• 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:
    PURPOSE: A hydraulic control apparatus is provided to achieve a simple structure of the apparatus and an accurate control operation by modifying the mount structure of a control valve installed in a jack plate. CONSTITUTION: An apparatus comprises a jack plate(2) having a plurality of flow channels(2a,2b,2c,2d) for supplying hydraulic fluid from a lower oil tank(1) to an upper hydraulic jack(3) and hydraulic cylinder(4), a control valve(10) having a plurality of grooves(11,12) so as to be inserted into a valve hole(2e) of the jack plate and move by an external force so as to control the flow channels, the control valve having a communication hole(13) formed from the groove to an end of the control valve for a communication to the flow channel, a cap bolt(15) coupled to an end of the valve hole of the jack plate so as to prevent hydraulic fluid leakage, a return spring(16) supported by the cap bolt so as to provide a resilient force to the control valve, and a stopper member(17) arranged an end side of the control valve so as to prevent the control valve from being escaped outwardly.
    公开号:KR20000060925A
    申请号:KR1019990009617
    申请日:1999-03-22
    公开日:2000-10-16
    发明作者:이승춘
    申请人:이승춘；
    IPC主号:
    专利说明:

    Hydraulic control apparatus of manual transport cargo transport equipment
    The present invention relates to a hydraulic control device for a manual transport cargo transport apparatus, and in particular, by changing the mounting structure of the control valve installed in the jack plate to simplify the configuration of the device, but more accurate control operation of the cargo transport device for It relates to a hydraulic control device.
    Manual cargo transport devices such as pallet loaders and lifters are mainly used to transport and transport cargo to a certain place after loading the cargo.
    2 is a sectional view showing a hydraulic control structure.
    As shown in FIG. 1, the manual transport cargo transport apparatus includes a wheel W, a jack plate 40 having a hydraulic jack 51 installed at an upper portion thereof, and a control valve for controlling and controlling a flow path therein, and It is installed on the upper portion of the jack plate 40, the hydraulic cylinder 52 is provided with a working fluid by the hydraulic jack 51, and connected to the hydraulic jack 51 and the hydraulic cylinder 52 to move up and down by a predetermined height The pallet loader 26 is configured as a pallet loader 26, and the pallet loader 26 is loaded with cargo while the flow path in the jack plate 40 is changed according to the operation of the holder 25. It is possible to move up and down by the height of.
    Here, the control valve installed on the jack plate 40 has been registered by the applicant in the 'hydraulic control structure of the manual transport cargo transport apparatus' of the 'patent application 95-15804'.
    2 to 3, the patent patent invention is provided with a hydraulic jack 51 and a hydraulic cylinder 52 at the upper portion and a lower portion in order to raise and lower the pallet loader 26 by a predetermined height. The oil tank 55 is located and a plurality of flow paths (60a, 60b, 60c, 60d) and the valve hole 45 is formed therein jack plate 40 through which the working fluid is circulated, and the jack plate 40 Inserted into the valve hole 45, one side is connected to the lever 25a of the operation period 25, and retains the elasticity of the spring (S) to open the flow path (60a, 60b, 60c, 60d) of the jack plate 40 It consists of the control valve 30 which interrupts and controls.
    Here, the jack plate 40 has a first flow path 60a connected to the valve hole 45 at the tank port 55P of the oil tank 55 and the hydraulic jack 51 at the valve hole 45. A second flow path 60b connected to the jack port 51P, a third flow path 60c branched from the second flow path 60b and connected to the valve hole 45, and a hydraulic pressure in the valve hole 45. A fourth flow path 60d is formed which is connected to the cylinder port 52P of the cylinder 52.
    In particular, the control valve 30 is the first flow path (60a) and the second flow path (60b) so that the working fluid of the oil tank 55 is provided on the hydraulic cylinder 52 side to raise the pallet loader 26. ) And the fourth channel at the neutral position where the first and second grooves 31 and 32 and the pallet loader 26 stop at the same time communicating the third channel 60c and the fourth channel 60d. The second flow path 60b and the third flow path 60c of the first groove 31 are blocked so that 60d is blocked and only the first flow path 60a and the second flow path 60b and the third flow path 60c communicate with each other. Neutral groove 31a formed to extend by a predetermined width, and the first groove 31 to discharge working fluid from the hydraulic cylinder 52 side to the oil tank 55 side to lower the pallet loader 26. The first flow path (60a) and the fourth flow path (60d) of the c) is extended by a predetermined width is composed of a falling groove (31b) for communicating the fourth flow path (60d) and the first flow path (60a).
    Such control valve 30 is sequentially moved in the valve hole 45 of the jack plate 40 in accordance with the degree of grabbing or pulling the lever (25a) is installed between the operation 25, each flow path It is comprised so that intermittent control of (60a, 60b, 60c, 60d) may be carried out.
    However, the hydraulic control valve of the present invention made as described above has a stopper 35 to prevent the control valve 30 from being detached from the state exposed through the cap bolt 34 fastened to the jack plate 40. ), And O-rings (36a, 36b) to be installed on both sides of the control valve 30 so as not to leak the fluid, the assembly structure is complicated, there is a problem that the efficiency of the valve control operation is inferior.
    The present invention has been made to solve the above problems, by forming a hole in the inside of the control valve to fill the space at the end according to the left and right movement to improve the reliability of the control operation at the same time the mounting structure of the control valve It is to provide a hydraulic control device of the manual transport cargo transport apparatus to be made simple.
    Hydraulic control device of the manual transport cargo transport apparatus of the present invention for realizing the above object is a jack plate which is formed with a plurality of flow paths so that the working fluid is supplied to the upper hydraulic jack and the hydraulic cylinder in the lower oil tank; The control valve is inserted into the valve hole of the jack plate and a plurality of grooves are formed to switch the flow path by the external force and at the same time a communication hole is formed from the groove to the end portion so as to communicate with the flow path; ; A cap bolt fastened to an end of the valve hole of the jack plate to seal the inside thereof; A return spring supported by the cap bolt to provide an elastic force to the control valve; It is characterized in that the stopper means is provided on the front end side of the control valve to limit the control valve from leaving the outside.
    1 is a schematic perspective view showing a conventional manual transportation freight transport device,
    Figure 2 is a cross-sectional view showing a hydraulic control structure of a prior art manual cargo transport apparatus;
    3 is a perspective view showing a hydraulic control valve of the prior art,
    4 is a view showing the main part of the manual transport cargo transport apparatus according to the present invention,
    FIG. 5 is a cross-sectional view taken along the line A-A of FIG. 4, showing a hydraulic control structure;
    6 is a plan view illustrating a hydraulic control valve according to the present invention.
    <Description of the code | symbol about the principal part of drawing>
    1: Oil tank 2: Jack plate
    2a, 2b, 2c, 2d: flow path 2e: valve hole
    3: hydraulic jack 4: hydraulic cylinder
    5: operating lever 6: rod
    10: control valve 10a: ring groove
    11: first groove 12: second groove
    13: communication hole 14: locking jaw
    15: cap bolt 16: return spring
    17: stopper bolt
    Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
    Figure 4 is a configuration of the main part of the freight transport apparatus equipped with a hydraulic control valve according to the present invention.
    As shown in FIG. 4, a jack plate 2 having a valve hole 2e formed therein is installed between the oil tank 1 and the hydraulic jack 3, and the jack plate 2 is disposed in the oil tank 1. The control valve 10 is provided so that the flow path connected to the hydraulic jack 3 and the hydraulic cylinder can be switched.
    In this case, the control valve 10 is exposed to the outside of the jack plate (2) and the operating lever (5) connected to the rod (6) in accordance with the user's operation is to rotate linearly, the end is the operation lever It is supported by a return spring 16 to provide a force against (5). The return spring 16 is supported by a cap bolt 15 fastened to the jack plate 2.
    FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4, and FIG. 6 is a view illustrating a control valve, and the structure of the control valve described above with reference to FIGS. 5 and 6 is as follows.
    First, the hydraulic jack 3 and the hydraulic cylinder 4 are provided on the upper part of the jack plate 2 to raise and lower the pallet loader by a predetermined height, and the oil tank 1 is located on the lower part thereof. A plurality of flow paths 2a, 2b, 2c, 2d and valve holes 2e are formed therein to allow the working fluid to circulate.
    The jack plate 2 has a first flow path 2a connected from the tank port 1P of the oil tank 1 to the valve hole 2e, and a jack of the hydraulic jack 3 at the valve hole 2e. A second flow passage 2b connected to the port 3P, a third flow passage 2c branched from the second flow passage 2b and connected to the valve hole 2e, and a hydraulic cylinder in the valve hole 2e. The 4th flow path 2d connected to the cylinder port 4P of (4) is formed.
    In addition, the control valve 10 is inserted into the valve hole 2e of the jack plate 2 so that the front end is supported by the stopper bolt 17 and the rear end is supported by the cap bolt 15. ), The flow paths 2a, 2b, 2c, and 2d of the jack plate 2 are interrupted and controlled.
    The control valve 10 as described above allows the first flow passage 2a, the second flow passage 2b, and the third flow passage so that the working fluid of the oil tank 1 is provided on the hydraulic cylinder 4 side to raise the pallet loader. The first groove 11 and the second groove 12 are formed to communicate the flow path 2c and the fourth flow path 2d at the same time.
    Here, the first groove 11 blocks the fourth flow path 2d at the neutral position where the pallet loader is stopped, and only the first flow path 2a, the second flow path 2b, and the third flow path 2c. In communication, a neutral groove 11a is formed such that the second flow path 2b and the third flow path 2c of the first groove 11 extend by a predetermined width, and the hydraulic cylinder (for lowering the pallet loader) The first flow path 2a and the fourth flow path 2d of the first groove 11 are extended by a predetermined width so that the working fluid is discharged from the 4) side to the oil tank 1 side, and the fourth flow path 2d The first flow passage 2a can be communicated with.
    In particular, the control valve 10 of the present invention is formed with a communication hole 13 penetrating from the first groove to the end where the return spring is located, the communication hole 13 is the control valve 10 is a valve The first flow path 2a and the first flow path are formed in accordance with the movement of the control valve 10 so that a vacuum phenomenon does not occur in the space M between the control valve 10 and the cap bolt 15 when moving back and forth inside the hole 2e. The working fluid provided through the one groove 11 is filled.
    That is, the O-ring which is sealed by the cap bolt 15 on one side and the other side is inserted into the ring groove 10a of the control valve 10 so that the working fluid does not leak out to the valve hole 2e of the jack plate 2. Since the vacuum phenomenon may occur in the return spring mounting space M when the control valve 10 moves, it is provided through the communication hole 13 to the space M through the first flow path 2a. Filling the oil is facilitated the movement of the control valve 10 it is possible to achieve a more accurate control operation.
    In addition, the control valve 10 is subjected to an elastic force in the left direction of the valve hole 2e by the return spring 16, so that a locking jaw 14 is formed at the front end thereof so as to be caught by the stopper bolt 17. It is.
    Of course, the bolt plate is processed to fasten the stopper bolt 17 to the jack plate 2, and the end of the fastened stopper bolt 17 is exposed to the inside of the valve hole 2e so that the control valve 10 It will limit the movement of to the left.
    Therefore, the hydraulic control device of the manual transport cargo transport apparatus of the present invention constructed and operated as described above is configured to be filled with oil through a communication hole when moving left and right, and the cap bolt and stopper mounting structure is simplified to improve the efficiency of the valve control operation. As well as improved, there is an advantage that the assembly of the device is improved.
    权利要求:
    Claims (2)
    [1" claim-type="Currently amended] A jack plate in which a plurality of flow paths are formed so that a working fluid is supplied from the lower oil tank to the upper hydraulic jack and the hydraulic cylinder; The control valve is inserted into the valve hole of the jack plate and a plurality of grooves are formed to switch the flow path by the external force and at the same time a communication hole is formed from the groove to the end portion so as to communicate with the flow path; ; A cap bolt fastened to an end of the valve hole of the jack plate to seal the inside thereof; A return spring supported by the cap bolt to provide an elastic force to the control valve; And a stopper means installed on the front end side of the control valve to restrict the control valve from escaping to the outside.
    [2" claim-type="Currently amended] The method of claim 1,
    The stopper means is fastened to the jack plate and the stopper bolt protruding into the valve hole and the hydraulic control device of the manual transport cargo transport device, characterized in that consisting of the locking step formed on the front end of the control valve to be caught by the stopper bolt.
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    同族专利:
    公开号 | 公开日
    KR100284610B1|2001-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1999-03-22|Application filed by 이승춘
    1999-03-22|Priority to KR1019990009617A
    2000-10-16|Publication of KR20000060925A
    2001-03-15|Application granted
    2001-03-15|Publication of KR100284610B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019990009617A|KR100284610B1|1999-03-22|1999-03-22|Hydraulic control apparatus of a palette loader|
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