• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention provides a cab body 4, a swivel table 2 provided on the cab body so as to be able to turn around the slewing longitudinal axis X, a driver's seat 5 provided on the swivel table, and Swing bracket pivotally pivotally supported around a pivot shaft 19A extending longitudinally to a steering box 6 mounted on the upper surface of the pivot table and a flange unit 17 provided on the front end surface of the pivot frame in front of the driver's seat. 18, a boom 20 that is swingably attached to the swing bracket about a transverse shaft 22, and a boom that connects one end of the swing bracket to the other end of the swing bracket to swing the boom. It is a small swing work machine provided with the cylinder 21. The boom cylinder 21 is disposed on the outside of the boom along the rear wall surface of the boom, and a work space 100 is formed between the control box 6 and the driver's seat 5. The distance L1 from the pivot axis X of the swing table 2 to the swing shaft center 19a and the distance L2 from the pivot axis X to the rear end of the swing table 2 are substantially the same.
    公开号:KR20030069030A
    申请号:KR1020020051308
    申请日:2002-08-29
    公开日:2003-08-25
    发明作者:유까와가쯔히꼬；와다다까후미；신따니마사노리；후지와라쥰이찌
    申请人:가부시끼 가이샤 구보다；
    IPC主号:
    专利说明:

    SMALL SWIVEL TYPE WORKING VEHICLE}
    [27] The present invention provides a cab body, a swivel table provided on the cab body so as to be able to turn around the slewing longitudinal axis, a driver's seat installed on the swivel table, and a steering box installed on an upper surface of the swivel table in front of the cab. And a swing bracket pivotally pivotally supported around a pivot axis extending in the longitudinal direction to a flange unit provided at the front end face of the pivot table, the boom pivotally attached to the swing bracket about a transverse axis and the boom to swing. And a small swinging machine, in particular a small backhoe, having a boom cylinder connecting one end of the swing bracket to the other end of the boom.
    [28] Such a small backhoe is known, for example, from Japanese Patent Laid-Open No. 8-134948.
    [29] In the case of the backhoe, it is easy to secure a living space around the driver's seat and a work space that allows the driver to get on and off from both sides if the turntable is a large or medium sized backhoe that is sufficiently large. When it is difficult to configure so that normal work as a backhoe can be secured while attempting to secure a minimum, attempting to secure a minimum living space and a working space causes a problem that the front and rear balance of the turning table deteriorates or the swing angle of the boom decreases. In particular, ensuring adequate working space is closely related to the layout of the steering box pivot.
    [30] In the conventional backhoe, usually, a plurality of control valves for controlling pressure oil to actuators such as left and right travel motors, travel shifting, swing motors, dozer cylinders, boom cylinders, arm cylinders, bucket cylinders, swing cylinders, Although an operation means for operating the control valve is provided, the operation means is disposed in the steering box, whereas the control valve is disposed inside the swing table away from the control box.
    [31] Transmission of the operating force from the control means to the control valve and interlocking with the control lever via links and rods using mechanical control valves, such as control valves for left and right travel, dozers, swings, swing, boom For example, for arms, etc., a hydraulic control valve is controlled by pilot pressure by operating a pilot valve with an operation lever using a hydraulic control valve.
    [32] Controlling the control valve with this pilot pressure requires frequent and delicate operation, and a plurality of valves arranged in the control box are operated by a pair of left and right operation levers.
    [33] Only the control means is arranged in the control box, and the control valve is arranged in the pivot table away from the control box, so that the control box itself does not have to be so large in front and rear width, so that the distance between the back of the control box and the driver's seat is increased. To secure a foot space. However, since the control valves are arranged in the swing table away from the control box, their arrangement is not gathered together, and the piping space is also required, which is difficult to simplify. In addition, when the control valve is disposed in the swing table, the volume of oil tanks, fuel tanks, etc., which are disposed in the swing table in the same way, is pressed in order to form the control valve arrangement space inside the swing table.
    [34] Therefore, it is considered to arrange the control valve below the operation means in the control box. However, when the control valve is disposed in the control box, the front and rear dimensions of the control box increase, particularly in the small-sized turning back heavy rain from the driver's seat to the excavator. Since the distance is very short, large front and rear dimensions of the control box disposed therebetween narrow the work space and deteriorate the driver's mobility. In addition, the upper part of the control valve may interfere with the operation means, making assembly and maintenance difficult.
    [35] It is an object of the present invention to provide a small swing work vehicle that can secure a sufficient working space by improving the structure and layout of a control box. At that time, a good forward and backward balance of the swing table and a sufficient swing angle of the boom must be maintained.
    [1] BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view showing the whole of a backhoe which is an example of a swing working machine according to the present invention.
    [2] FIG. 2 is a plan view of the bag heavy rain according to FIG. 1;
    [3] 3 is a side view showing the front portion of the backhoe according to FIG. 1;
    [4] 4 is a side view of the control box.
    [5] 5 is a rear view of the control box.
    [6] 6 is a plan explanatory view showing a relationship between a control box and a boom;
    [7] <Explanation of symbols for the main parts of the drawings>
    [8] 1: back heavy rain
    [9] 2: turning table
    [10] 3: excavation device
    [11] 4: crawler traveling device
    [12] 5: driver's seat
    [13] 6: control box
    [14] 7: box cover
    [15] 8: pilot valve
    [16] 9: control valve
    [17] 10: manifold
    [18] 11: piping
    [19] 12: frame
    [20] 13: left and right frame side plate
    [21] 15: Euro change unit
    [22] 17: flange unit
    [23] 18: swing bracket
    [24] 19: longitudinal axis
    [25] 20: boom
    [26] 21: boom cylinder
    [36] In order to achieve the above object, the rider body, a swivel table provided on the rider body so as to be able to turn around the slewing longitudinal axis X, a driver's seat installed on the swivel table, and the front of the driver's seat, A control box mounted on the upper surface of the swing table, a swing bracket pivotally pivotally supported around a pivot axis extending in the longitudinal direction to a flange unit provided on the front end surface of the swing table, and swingably attached to the swing bracket about a transverse axis In the small swinging machine according to the present invention having a boom cylinder having one end connected to the swing bracket and the other end thereof to the swing bracket to swing the boom and the boom, the boom cylinder is mounted on the rear wall surface of the boom. Therefore, it is arrange | positioned outside the said boom, and the working space is formed between the said control box and the said driver's seat, The distance L1 from the swing shaft center of the swing table to the swing shaft center and the distance L2 from the swing shaft center to the rear end of the swing table are substantially the same.
    [37] This ensures that the minimum required work space and the like can be maintained even after the wheel is downsized, or the swing angle of the boom is sufficiently sufficient while keeping the boom and the boom cylinder as close to the front surface of the control box as possible. You can set the size.
    [38] In addition, if the front end of the driver's seat adopts a layout positioned between the swing shaft center and the front end of the swing table, the space between the driver's seat and the control box can be enlarged only as long as the steering box protrudes forward from the front end of the swing table. Despite being a miniaturized turntable, sufficient working space can be secured.
    [39] Similarly, the front surface of the control box is formed with a convex curved surface, and the rear surface of the control box is formed with a concave curved surface, thereby enlarging the space between the driver's seat and the control box, and consequently, the working space without difficulty. It becomes possible.
    [40] Further, if the boom is substantially made of a hollow rectangular box member, and the aspect ratio of the rectangular cross section is approximately 1: 1, the boom swing angle of sufficient size can be secured even if the steering box is placed in front of the swing table.
    [41] One suitable embodiment of this invention is that the said control box is equipped with the pair of left and right frame side plates by which the lower end part was fixed to the turntable, and the intermediate | middle of the apparatus mounting space manufactured by the said left and right pair of frame side plates. The control valve is arrange | positioned at the area | region, the manifold is arrange | positioned above the said control valve, and the operation means is arrange | positioned on the said manifold. In this structure, by connecting the operation means, the control valve, and the manifold to the left and right frame side plates as a cross member, the frame structure is completed as a whole, and despite the simple structure, high strength can be obtained by reinforcing each other.
    [42] In the case where the operation means is constituted by a pair of left and right operation lever mechanisms, it is proposed to simplify the fixing to the frame side plate, and it is proposed that these operation lever mechanisms are fixed to the frame upper plate supported by the left and right pair of frame side plates. do.
    [43] One of the other suitable embodiment of this invention is that the center line of the front-back direction of the said control valve has shifted to the front side rather than the centerline of the said operation means, and the upper part of the said frame side plate is biased to the back side rather than the lower part, and the intermediate part of the said frame side plate is It is biased forward than the lower part. As a result, the piping work on the upper part of the control valve can be performed without being obstructed by the operation means, so that the piping work becomes easy, and the left and right direction side on the front side of the operation means and the left and right direction side on the control valve back side are connected to the left and right frame side plates. It can be opened without being disturbed by it, and maintenance of the front side of an operation means and the back side of a control valve becomes easy. In addition, the footing housing space between the driver's seat and the control box is enlarged, resulting in a satisfactory working space.
    [44] In order to facilitate piping work around the control valve, in a preferred embodiment of the present invention, the control valve arranges the spool in the vertical direction, and the pipe connecting the control valve and the operation means is placed in front of the control valve. And extend upwards.
    [45] In another suitable embodiment of the present invention, the swing bracket is disposed above the rider body, and its swing shaft center is located behind the front roller shaft of the crawler device constituting the rider body. In the case of micro backhoes, there is a need to keep the body length as short as possible while maintaining a high weight balance. Therefore, in the normal posture of the backhoe (posture with the boom straight forward, see FIG. 1), the swing bracket is arranged in a space partitioned by the front end face of the swing table disposed on the crawler device and the top face of the crawler device. By positioning the swing shaft center of the swing bracket behind the front roller shaft, it is possible to stably perform the bucket work even though it is extremely small.
    [46] Similarly, in order to satisfy the requirement to keep the body length as short as possible while maintaining a high weight balance in the ultra-compact backhoe, the present invention proposes a layout in which the rear end of the pivot stage and the rear roller shaft of the crawler traveling apparatus are approximately coincident. It is.
    [47] Other features and advantages of the present invention will become apparent from the following description of the embodiments using the drawings.
    [48] EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on drawing.
    [49] 1 and 2, an ultra-small backhoe 1 is shown as an example of a turning work machine. The backhoe 1 is a crawler traveling device 4 that functions as a main body of the rider, a turning table 2, and a turning point. It consists of the excavation apparatus 3 attached to the base 2. As shown in FIG.
    [50] The crawler traveling device 4 rotates around the axle 4b at the rear of the left and right side frames 31 and the front roller 4A at the front of the track frame. The rear roller 4B, which is made of a rubber or steel crawler 32 wound around these rollers, and functions as a driving roller, is driven by a hydraulic left and right traveling motor.
    [51] The track frame supports the left and right side frames 31 so as to be movable in the left and right directions and moves them in the hydraulic cylinder. The right and left crawler traveling apparatus 4 is of a variable width (tread width) type.
    [52] When the crawler traveling device 4 is the maximum width, the distance from the pivot axis X to the outer end of the left and right crawler traveling device 4 is approximately equal to, or slightly (10%) the maximum radius of the swing table 2. It is long).
    [53] When the crawler traveling device 4 is the narrowest width, the distance from the pivot axis X to the outer end of the right and left crawler traveling device 4 is from the pivot axis X to the left and right sides of the pivot table 2. It is approximately equal to the distance, or slightly longer (about 10%).
    [54] The track frame is equipped with a revolving table 2 through the revolving bearing 34 on the upper portion thereof, and the revolving table 2 is capable of turning left and right about the revolving axis X by a revolving motor. The doser 35 is attached to the front part of the track frame so as to be lifted and lowered via the doser cylinder 36.
    [55] The pivot table 2 is formed by welding a frame, a vertical wall, a support base, etc. on the base plate 2A as a base, and the counterweight 37 which forms the last end part of the pivot table 2 is provided in the rear end. It is.
    [56] On the pivot table 2, it is disposed on the engine 38, the fuel tank 39, the oil tank 40, the hydraulic pump 41 driven by the engine 38, the radiator 42, the oil tank 40. The battery 43, the bonnet 44 covering them, the driver's seat 5 attached to the bonnet 44, the control box 6 disposed in front of the driver's seat 5, and the like are mounted. The whole of the above-mentioned components mounted on the swing table 2 and the swing table 2 is called the upper member 30.
    [57] The oil tank 40 is installed in the counterweight 37 or the front side, the hydraulic pump 41 is a pilot pressure hydraulic pump for supplying pilot oil to the operation means, in addition to the main pump for supplying the operating oil to the various actuators Also have.
    [58] The upper surface of the turntable 2 on the front side of the driver's seat 5 is a step 45. A flange unit 17 is provided at the front end of the swing table 2. In this flange unit 17, the swing bracket 18 of the excavating device 3 is rotatably mounted around the longitudinal axis 19 having the shaft center 19a.
    [59] 1, the swing bracket 18 is disposed above the crawler traveling apparatus 4, and the swinging shaft center 19 of the swing bracket 18 is the front roller shaft center of the crawler traveling apparatus 4 (Fig. 1). It is located behind 4a). Moreover, the rear end part of the revolving stand 2 and the rear roller shaft 4b of the said crawler traveling apparatus 4 correspond substantially.
    [60] As is apparent from Figs. 3 to 6, the steering box 6 is disposed in front of the driver's seat 5 and in front of the swing table 2, and stores almost everything necessary for steering therein. 4 and 5, the reference numeral 12 is an entrance-type frame viewed from the front, and the flow path manifold is attached to the upper part of the frame 2 by attaching a pilot valve 8 and a flow path manifold 10 as operating means. A large number of control valves 9 are arranged in the middle portion of the lower side of the fold 10, and the pedals are supported at the lower portion to cover them with the box cover 7.
    [61] The pilot valve 8 and the control valve 9 in the box cover 7 do not have the same front-rear position, and the front-rear center 9S of the control valve 9 is smaller than the center 8S of the pilot valve 8. It is biased (offset) toward the front side.
    [62] The spool 9a of the control valve 9 is located approximately in the middle of the front and rear direction of the valve body, and hydraulic pipes or links for pilot oil operation are connected to the upper and lower ends thereof, but the control valve 9 is connected to the pilot valve 8. ) And the manifold 10 directly below, they become obstacles, making it difficult to connect hydraulic piping or links.
    [63] As described above, only by slightly displacing the control valve 9 from the pilot valve 8 to the front side, piping work on the upper part of the control valve 9 is facilitated, and only by displacing the control valve 9 forward. Since the distance from the driver's seat 5 to the control valve 9 becomes long, even if the pipe 11C is connected to the back surface of the control valve 9, the space required most for the free movement of the driver's foot can be enlarged, and consequently the steering The work space 100 formed between the box 6 and the driver's seat 5 is also enlarged.
    [64] That is, by deflecting the control valve 9 to the front side, the back surface (back surface of the rear cover 7R) of the control box 6 is formed in concave shape, and even if the front and rear dimensions of the control box 6 are the same as the conventional one, the upper and lower midway The work space 100 is enlarged by shifting the part to the front side, making a bag on the rear side, increasing the distance from the driver's seat 5.
    [65] As for the pipe 11 connecting the control valve 9 and the manifold 10, a pipe 11A connected to the lower side of the control valve 9 is disposed along the front surface of the control valve 9. The pipe 11B connected to the upper side of the control valve 9 extends almost immediately above the control valve 9. A pipe 11C connected to the control valve 9, the hydraulic pump 41, and the oil tank 40 extends downward from the rear surface of the control valve 9. And these piping 11 can remove piping and the box cover 7, and piping operation and repair are attained.
    [66] As the control valve 9 is biased to the front side, the left and right frame side plates 13 of the frame 12 bias the upper part to the rear side and the middle part to the front side with respect to the lower part, respectively, and the pilot valve 8 ) The left and right side sides of the front side and the control valve 9 can be opened without being hindered by the frame 12, so that the front side and the control valve 9 of the pilot valve 8 can be opened. The upper side, the lower side of the pilot valve 8, the rear side of the control valve 9, and the like are easily shaped.
    [67] The box cover 7 has a front cover 7F and a rear cover 7R, and is detachable back and forth, and is detachably attached to the pivot table 2, respectively. The front and rear dividing surfaces P of the front and back covers 7F and 7R have a shape in which the intermediate portion is located in front of the upper portion. That is, the side surface shape is formed in substantially S shape (right side S shape, left side reverse S shape), and the divided surface formation edge part of the front cover 7F and the rear cover 7R is not gathered in a wave shape.
    [68] By forming the front and rear dividing line P of the box cover 7 in a substantially S shape, the front and rear dividing line P passes through the front and rear center positions of each of the pilot valve 8 and the control valve 9 from the side. I will go. As a result, the pilot valve 8 is not disturbed by the rear cover 7R when the front cover 7F is opened, and is not disturbed by the front cover 7F when the rear cover 7R is opened. ) And the front or rear side of the control valve 9 can be repaired.
    [69] In addition, when the front cover 7F is opened by forming the front and rear dividing line P in a substantially S-shape, the front side of the pilot valve 8 and the upper side of the control valve 9 can be greatly opened, and the rear cover ( When 7R) is opened, the lower side of the pilot valve 8 and the rear side of the control valve 9 can be greatly opened, and the front and rear sides can be opened at the center instead of uniformly opening up and down, respectively, and the parts requiring maintenance are removed. It can be opened for easier maintenance.
    [70] After the control valve 9 is biased to the front side, the front surface of the steering box 6 protrudes forward from the front end of the swing table 2, and the front surface of the steering box 6 (front cover 7F) The front face] is formed with a convex curved surface, and the whole steering box 6 is conventionally shifted to the front side, so that the distance from the front end of the driver's seat 5 and the bonnet 44 to the back of the steering box 6 is made larger. The work space 100 is enlarged.
    [71] The control box 6 is wide in the upper part from the middle part to the lower part from the front side, and the left and right space | interval of the left and right pedals 59, 60, 61 etc. which are arrange | positioned at the lower part does not become wide enough.
    [72] The pilot valve 8 is a pair of left and right, is attached to the frame upper plate 14 and is configured as an assembly, and both ends of the frame upper plate 14 are fixed to the left and right frame side plates 13. In addition, since the manifold 10 is connected to the upper part of the left and right frame side plates 13 and the control valve 9 is connected to the middle part, the frame 12 is not only an entrance shape, but also two of them. In addition, the left and right frame side plates 13 are connected by the control valve 9 and the manifold 10.
    [73] As the control valve 9, both of hydraulic type (hydraulic controlled by pilot pressure) and mechanical type (operating force is transmitted through a link or the like) are used, and the entire control valve 9 includes a plurality of valve members. From the driver's seat 5, it arrange | positions in the state superposed | polymerized in the left-right direction, the spool 9a of each valve member is arrange | positioned in the longitudinal direction, and the spool 9a is parallel to each other.
    [74] The control valve 9 is, for example, a swing valve 9A for a swing motor, an arm valve 9B for an arm cylinder 49, and a boom valve (elevation valve) 9C for a boom cylinder 21. , Bucket valve (purge and dump valve) 9D for the bucket cylinder 51, travel left valve 9E and travel right valve 9F for the left and right travel motor 33, for the doser cylinder 36 Swing valve for swing cylinder 52 swinging a doser valve 9G for a service port, a switching valve 9H for a service port, a shift valve 9J for a left and right traveling motor 33, and a swing bracket 18 ( 9K), and the whole control valve which controls the various actuators which are attached to the backhoe 1 is provided adjacently. The order of arrangement of these control valves 9 is appropriately set as necessary.
    [75] The traveling left valve 9E, the traveling right valve 9F, the doser valve 9G, the shift valve 9J, the switching valve H, and the like are mechanical control valves, and include links, arms and operation levers or operation pedals. Each manipulator is manipulated through
    [76] On the other hand, since the turning valve 9A, the arm valve 9B, the boom valve 9C, the bucket valve 9D, the swing valve 9K, and the like require frequent and delicate operation, the pilot hydraulic control valve is It is used, and hydraulic operation is possible by the pilot pressure oil from the hydraulic pump 41 driven by the engine 38.
    [77] Blocks 53A and 53B are connected at both ends thereof to sandwich the entire control valves 9A to 2K, and both of the blocks 53A and 53B are provided with a pump port P and a tank port T of the main circuit. The main pipe and the drain pipe (piping 11C shown in Fig. 4) are connected to each other.
    [78] In addition, the entire control valves 9A to 2K and the left and right blocks 53A and 53B are attached to the left and right pair of frame side plates 13 in a state where they are sandwiched, and serve to connect the upper and lower middle parts of the left and right frame side plates 13. Is also doing.
    [79] The flow path manifold 9 fixes a pair of right and left pilot valves 8 on the upper surface, and a flow path switching unit for switching the flow path connection pattern between the pilot valve 8 and the control valves 9A to 2K on the lower surface ( 15) is attached.
    [80] The flow path manifold 9 sandwiches one block and arranges two blocks so that a plurality of flow paths connecting them between the pilot valve 8 and the flow path switching unit 15 are formed.
    [81] The left and right pilot valves 8 each have one operation lever 55. The left operation lever 55 is for turning and arms, the right operation lever 55 is for booms and buckets, and each operation lever 55 is swingable from side to side and back and forth, and each pilot valve ( 8) Two valve members can be operated either alternatively or simultaneously.
    [82] Both ends of the frame upper plate 14 are fixed to the upper side of the left and right frame side plates 13, and the frame upper plate 14 supports not only the pilot valve 8 but also the left and right travel operation lever 56. . The left and right travel operation lever 56 constitutes a part of the operation means, and is connected to the spools of the left and right travel valves 9E and 9F via a link and an arm or the like.
    [83] The flow path switching unit 15 switches the flow path between the pilot valve 8 and the control valve 9 to change the combination, and one spool is held in the flat unit body and disposed on the outer surface of the unit body. The switching lever is capable of sliding in the axial direction.
    [84] An unload valve 57 is provided on the lower surface of the flow path manifold 10 and is connected in parallel with the pilot flow path from the hydraulic pump 41 to the pilot valve 8. Reference numeral 57A denotes an operation lever of the unload valve 57, which rotates the pilot pressure oil to make the pilot valve 8 inoperable. As a result, the excavator 3 does not operate even when the operation lever 55 is inadvertently rocked.
    [85] The left and right frame side plates 13 of the frame 12 have die plates 12A for attaching to the pivot table 2 at the lower left and right sides, and tubular members 58A and 58P are provided near the left die plate 12A. And pivotally support the pedal rotation shaft connected to the switching valve 9H on the tubular member 58A, and the service pedal 59 is mounted on the pedal rotation shaft, and interlocked with the shift valve 9J on the tubular member 58B. The pedal rotation shaft is pivotally supported, and a shift pedal 60 for switching the driving speeds 1 and 2 is mounted on the pedal rotation shaft.
    [86] Further, a tubular member 58C is provided near the right die plate 12A, pivotally supporting a pedal rotary shaft linked to the swing valve 9K on the cylindrical member 58C, and swing pedal 24C on the pedal rotary shaft. Equipped with.
    [87] A doser for pivotally supporting the lever shaft 62 via the stay in the middle portion of the right frame side plate 13 and the manifold 10 and operating the doser valve 9G at the outer end of the lever shaft 62. The lever 63 is provided.
    [88] The excavating device 3 includes a swing bracket 18 supported on the flange unit 17 via a longitudinal axis 19, and a boom 20 that is swingably mounted around the horizontal transverse axis 22 on the swing bracket 18. ), A boom cylinder 21 whose one end is pivotally supported on the swing bracket 18 via a horizontal horizontal axis 23, and whose other end is pivotally connected to the boom 20, and a tip end of the boom 20 An arm 48 which is pivotally supported at the same time and swings to the arm cylinder 49, and a bucket (work tool) which is pivotally supported at the distal end of the arm 48 and is pumped (scratched) and dumped to the bucket cylinder 51 ( 50).
    [89] The flange unit 17 consists of two bracket plates which are spaced apart from each other, projecting forward from the front surface (most front end) of the pivot table 2 on the front side of the steering box 6, and steering. While the box 6 is located approximately at the center of the left and right directions, the flange unit 17 is arranged to be shifted to the left and right one side (right side).
    [90] The distance L1 from the pivot axis X of the pivot table 2 to the distal end or longitudinal axis 19 of the flange unit 17 is the distance L2 from the pivot axis X to the rear end of the pivot table 2. The distances L1 and L2 are set to be substantially the same as or shorter, and the distances L1 and L2 are substantially the same as the distance from the pivotal axis X to the outer end of the crawler 32 when the crawler traveling device 4 is made wide. Or smaller.
    [91] Since the swing work machine 1 is small, the swing table 2 is very small, and the width of the swing table 2 is about twice or less the width of the driver's seat 5 of a standard size, and the front part of the driver's seat 5 is the pivot axis. The engine 38 is also arranged near the pivot center X as the position approaches the X and the front portion of the bonnet 44 overlaps with the pivot axis X. As shown in FIG.
    [92] In order to make the front-back balance of the turntable 2 front-back balance from the front face of the turntable 2 of the said flange unit 17 small, it is preferable that it is as small as possible. Therefore, distance L1 is made into the distance ( L2) is set below.
    [93] The boom 20 is bent in the middle region, and the attachment plate 20A is fixedly attached to the outer surface of the bent portion, and the base portion of the tube of the boom cylinder 21 is pivotally supported on the attachment plate 20A. The cylinder 21 is disposed outside the rear surface of the boom 20.
    [94] The boom 20 has the steering box 6 with the pivot table 2 so that the steering box 6 does not come into contact with the boom cylinder 21 in the posture shown in FIG. 1 where the rear surface is substantially parallel to the boom cylinder 21. The front face of the control box 6 is placed in front of the longitudinal direction bearing portion 18A of the swing bracket 18 and is moved forward and backward as far as possible. Is approaching.
    [95] As shown in Fig. 6, the boom 20 sets the aspect ratio to approximately 1: 1 in the cross-sectional shape. In the case of pivoting the tube base of the boom cylinder 21 into the boom 20, a hole is formed in the rear surface of the boom 20, so it is necessary to increase the width to secure the strength, but the boom cylinder 21 When arrange | positioning on the back outer side of the boom 20, even if a boom width is narrow, sufficient strength can be ensured.
    [96] 6 shows a state in which the boom 20 is swinged at an angle of about 60 degrees to the left and right by a dashed-dotted line and a 2-dot dashed line, and the boom cylinder 21 has a smaller dimension in the left-right direction than the boom 20. Since the boom 20 is formed to be narrow as mentioned above, when it swings, the distance extended to the back side from the boom center Y becomes short.
    [97] That is, by arranging the boom cylinder 21 on the rear side of the boom 20 and by forming the boom 20 in a narrow width, the swing angle of the boom 20 can be made larger, and the tip end portion of the swing table 2 is provided. Distance from the longitudinal axis 19 to the longitudinal axis 19 can be shortened, and the protrusion amount of the steering box 6 can be increased from the distal end of the turning table 2 and / or of the turning table 2 and the steering box 6. The tip portion can be further moved away from the pivot axis X so that the width between the driver's seat 5 and the control box 6 can be enlarged without difficulty while maintaining a good forward and backward weight balance of the pivot table 2. A work space 100 that can be satisfied is secured.
    [98] The backhoe 1 mentioned above employ | adopts various structures in order to miniaturize, ensuring the minimum work space 100 required.
    [99] That is, the driver's seat 5 is set to a size necessary for driving, and the distance from the driver's seat 5 to the operation lever 55 and the traveling operation lever 56 is set to an appropriate distance, and the engine 38 having the required horsepower and the proper capacity The fuel tank 39, the oil tank 40, the hydraulic pump 41, the radiator 42, the battery 43, and the like are mounted on the turning table 2 and covered with the small bonnet 44 as much as possible. The driver's seat 5 is mounted on 44.
    [100] Then, the front end of the driver's seat 5 is substantially aligned with the rear end of the bonnet 44 and the counterweight 37 which form the rear end of the turning table 2 in the front-rear direction. The front end of the bonnet 44 is substantially overlapped with the pivot axis X by bringing the front part of the bonnet 44 closer to the pivot axis X.
    [101] Further, the left and right widths of the bonnet 44 and the turning table 2 are slightly wider than the left and right widths of the driver's seat 5 in the left and right directions to form the turning table 2 in a substantially front and rear circular shape, and the control box ( 6) is disposed at approximately the center of the left and right ends of the swing table 2, and the flange unit 17 is provided on the right side from the center of the front end face of the swing table 2.
    [102] In order to make the backhoe 11 have the necessary functions and then make it as small as possible, the backhoe 11 is configured as described above and then has the following configuration.
    [103] The boom cylinder 21 is disposed outside the rear surface of the boom 20 so that the side closer to the control box 6 is the boom cylinder 21 which is narrower than the boom 20 and the width of the boom 20 is narrowed. The boom cylinder 21 is arranged outside the rear surface of the boom 20 so that the boom 20 can be inserted into an outer side. In particular, the cross-sectional shape of the boom 20 is set to an aspect ratio of approximately 1: 1 so that the width is sufficiently narrower than that of the prior art The swing angle of the boom 20, which brings the boom 20 and the boom cylinder 21 as close to the front surface of the control box 6 as possible, may be set to a sufficient size, or the operation box 6 may be further forward. It is possible to arrange on the side.
    [104] Further, the distance L1 from the pivot axis X of the pivot table 2 to the longitudinal axis 19 is set substantially the same as the distance L2 from the pivot axis X to the rear end of the pivot table 2, The distance L2 from the driver's seat 5 to the rear end of the turning table 2, the driver's seat 5 and the positional relationship between the bonnet 44 and the pivot axis X as short as possible, and then to the longitudinal axis 19 By shortening the distance L1, the front and rear balance of the turning table 2 is maintained well, and the maximum turning radius as the micro turning machine is reduced.
    [105] In addition, the front face of the steering box 6 and the longitudinal axis bearing portion 18A of the swing bracket 18 are close to the front-rear direction, and the swing bracket 18 with respect to the steering box 6 specified for the driver's seat 5. By adjoining the longitudinal bearing portion 18A of the wheel), the front and rear balance of the swing table 2 can be maintained satisfactorily, and the maximum turning radius as the micro swing is reduced, and the steering box 6 is placed on the front side more conversely. (5) It becomes possible to make living area, work space, etc. of the front side wider.
    [106] In addition, the front surface of the steering box 6 projects forward from the front end of the turning table 2, and the living space between the driver's seat 5 and the steering box 6 can be enlarged only as long as the front surface of the steering box 6 protrudes. As a result, the working space is also improved, and the size of the swing table 2 can be reduced if the swing table 2 is made smaller as long as the control box 6 protrudes forward.
    [107] In addition, when the front surface of the control box 6 is formed convexly by shifting the front-back direction center 9S of the control valve 9 to the front side rather than the center 8S of the pilot valve 8, a control box ( The back surface of 6) can be formed concave, so that the space between the driver's seat 5 and the control box 6 can be enlarged, resulting in a work space 100 that can be satisfied.
    [108] The present invention provides a small swing work vehicle that can secure a sufficient work space by improving the structure and layout of a control box.
    权利要求:
    Claims (10)
    [1" claim-type="Currently amended] With the rider body 4,
    A turntable 2 provided on the rider body so as to be able to turn around the turning longitudinal axis X;
    A driver's seat (5) installed in the turning table,
    A control box 6 installed on the upper surface of the turning table in front of the driver's seat,
    A swing bracket (18) pivotably pivotally supported around a pivot axis (19a) extending in the longitudinal direction to a flange unit (17) provided on the front end face of the pivot table;
    A boom 20 rotatably attached to the swing bracket about a horizontal axis 22;
    In the small swing work machine comprising a boom cylinder (21) connecting one end of the swing bracket to the other end of the boom to swing the boom,
    The boom cylinder 21 is disposed outside the boom along the rear wall surface of the boom,
    The work space 100 is formed between the control box 6 and the driver's seat 5,
    The small swing characterized in that the distance L1 from the pivot shaft center of the pivot table 2 to the swing shaft center 19a and the distance L2 from the pivot shaft X to the rear end of the pivot platform 2 are substantially the same. Working machine.
    [2" claim-type="Currently amended]
    The small swing work machine according to claim 1, wherein the front end of the driver's seat (5) is located between the swing shaft center (19a) and the front end of the pivot table (2).
    [3" claim-type="Currently amended] The small swing machine according to claim 1, wherein the front face of the control box (6) is formed with a convex curved surface, and the rear face of the control box (6) is formed with a concave curved surface.
    [4" claim-type="Currently amended] The small swing machine according to claim 1, wherein the boom is substantially made of a hollow rectangular box member, and an aspect ratio of the rectangular cross section is approximately 1: 1.
    [5" claim-type="Currently amended] 2. The control box (6) is provided with a pair of left and right frame side plates (13), the lower end of which is fixed to the pivot table (2), and the pair of left and right frame side plates (13). The control valve 9 is arrange | positioned in the intermediate region of the apparatus mounting space manufactured by this, the manifold 10 is arrange | positioned above the control valve 9, and the operation means 8 on the manifold 10 is carried out. A small swing work machine, which is arranged.
    [6" claim-type="Currently amended] 6. The frame according to claim 5, wherein the operating means (8) consists of a pair of left and right operating lever mechanisms (55), and these operating lever mechanisms (55) are frames supported by the left and right pair of frame side plates (13). A small swing work machine, which is fixed to the top plate (14).
    [7" claim-type="Currently amended] The front and rear center line 9S of the control valve 9 is biased forward than the center line 8S of the operation means 8, and an upper portion of the frame side plate 13 is lower than a lower portion thereof. A small swing working machine, which is biased toward the rear side, and the middle portion of the frame side plate (13) is biased to the front side than the lower portion thereof.
    [8" claim-type="Currently amended] The control valve (9) according to claim 5, wherein the spool (9a) is arranged in the vertical direction, and the pipes (11A, 11B) connecting the control valve (9) and the operation means (8) are controlled. A small swing work machine, which extends forward and upward of the valve (9).
    [9" claim-type="Currently amended] 9. The front roller shaft center of the crawler traveling apparatus of claim 1, wherein the swing bracket 18 is disposed above the rider body 4, and the oscillation shaft center 19a is configured as a front roller axial center of the crawler traveling device constituting the rider body. Swivel working machine, characterized in that located behind the 4a).
    [10" claim-type="Currently amended] The swing work machine according to any one of claims 1 to 8, wherein the rear end of the swing table (2) and the rear roller shaft (4b) of the crawler traveling device are substantially coincident with each other.
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    同族专利:
    公开号 | 公开日
    DE10239745A1|2003-08-28|
    KR100497451B1|2005-06-23|
    US6886277B2|2005-05-03|
    US20030154635A1|2003-08-21|
    FR2836168A1|2003-08-22|
    DE10239745B4|2007-04-26|
    FR2836168B1|2006-01-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2002-02-15|Priority to JP2002038557A
    2002-02-15|Priority to JP2002038555A
    2002-02-15|Priority to JPJP-P-2002-00038557
    2002-02-15|Priority to JP2002038558A
    2002-02-15|Priority to JPJP-P-2002-00038558
    2002-02-15|Priority to JPJP-P-2002-00038555
    2002-08-29|Application filed by 가부시끼 가이샤 구보다
    2003-08-25|Publication of KR20030069030A
    2005-06-23|Application granted
    2005-06-23|Publication of KR100497451B1
    优先权:
    申请号 | 申请日 | 专利标题
    JPJP-P-2002-00038557|2002-02-15|
    JP2002038558A|JP3895614B2|2002-02-15|2002-02-15|Swivel work machine|
    JPJP-P-2002-00038558|2002-02-15|
    JPJP-P-2002-00038555|2002-02-15|
    JP2002038557A|JP3895613B2|2002-02-15|2002-02-15|Swivel work machine|
    JP2002038555A|JP3895611B2|2002-02-15|2002-02-15|Swivel work machine|
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