• 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:
    work machine, and lift link assembly the present invention provides a lift link assembly for a work machine having a work tool. the lift link assembly includes a frame, a boom arm, and an upper link, a lower link, and a hydraulic actuator. the boom arm is configured to be pivotally coupled to the work tool and has a surface that defines a longitudinal axis. the upper connection has a first end pivotally attached to the frame and a second end pivotally attached to the boom arm. the lower connection has a first end pivotally coupled to the frame and a second end pivotally coupled to the boom arm. the hydraulic actuator has a rod that is pivotally attached to the boom arm and moves between a retracted position and an extended position. the upper connection, lower connection and the hydraulic actuator are individually spaced from the longitudinal axis.
    公开号:BR102013017182B1
    申请号:R102013017182-4
    申请日:2013-07-03
    公开日:2021-03-23
    发明作者:Kyle T. Martin；Travis Shekleton；Andrew W. Kahler；Jeff Ekins；Nilesh Kumbhar
    申请人:Deere & Company；
    IPC主号:
    专利说明:

    [0001] [001] The present invention relates to a construction machine, such as a compact skid steer loader and, in particular, to a connection assembly for lifting a working implement of this construction machine. Fundamentals of the invention
    [0002] [002] Working machines, such as those used in agriculture, construction and forestry perform a variety of operations. In some cases, the machines are provided with an implement or work tool to perform a desired function. The implement or work tool, such as a bucket, lifting fork, or grapple, is movably coupled to a machine chassis by a mechanical lifting arm or boom. The lifting arm or boom is operationally controlled by a machine operator using controls arranged in a machine cab.
    [0003] [003] In one example, the machine may have a bucket operationally attached to its front. The machine operator can control the bucket to collect material at floor level and transport it to a desired location. The operator can operationally control the bucket starting from the floor level up to a maximum lift height, so that a defined point of the bucket moves along a lifting path. The shape of the lift path and the maximum lift height can be functions of the lift arm or boom assembly that couples the lift arm or boom to the chassis. In many cases, the relationship between the link assembly and the lifting arm or boom defines the lifting path and the maximum height attainable by the machine.
    [0004] [004] Conventional machines can be limited by the force generated by the hydraulic actuators to move the implement or work tool to a maximum height. In addition, many conventional machines can be designed to reach a higher maximum height, but with a limited breaking force at floor level (ie, the force required to break or loosen a portion of material from a compact pile) Other conventional machines they may have a greater potential for breaking force, but with shorter elevation path heights.
    [0005] [005] There is, therefore, a need to provide a machine and, in particular, a connection and boom assembly for the machine that can maximize the breaking performance at floor level and obtain even greater lifting heights. summary
    [0006] [006] In an exemplary embodiment of the present invention, a working machine includes a chassis and a floor locking mechanism. The floor locking mechanism is adapted to support the chassis. A work tool is attached to the chassis and is operationally controlled to perform a desired function. The machine also includes a pivot boom arm coupled to the work tool, where the boom arm is configured to move the work tool from a first position to a second position along an elevation path. An upper link is pivotally coupled by one end to the chassis and by an end opposite the boom arm, where the upper link is pivotally attached to the boom arm in a second location. The machine also includes a hydraulic actuator pivoted coupled by one end to the chassis and by an end opposite the boom arm, where the hydraulic actuator is pivotally attached to the boom arm in a third location. The first location and the second location are spaced from each other by a first distance, the second location and the third location are spaced from each other by a second distance, and the first location and the third location are spaced from each other by a third distance . Here, the first distance and the second distance are at least twice the third distance.
    [0007] [007] In a first aspect of this embodiment, the first distance and the second distance are at least three times the third distance. In a second aspect, the boom arm includes an internal surface that defines a longitudinal axis towards a center line of the machine. In a way this aspect, the upper connection is off-center in relation to the longitudinal axis by a first deviation distance and the hydraulic actuator is off-center from the longitudinal axis by a second deviation distance, where the first deviation distance is greater than the second deviation distance. In another form, the bottom link is off-center from the longitudinal axis by a third deviation distance, where the third deviation distance is less than the first deviation distance.
    [0008] [008] In another aspect, the upper connection comprises a transverse fold defined thereon between one end and its opposite end. In addition, the upper connection may include a rear coupling point defined between one end and its opposite end, so that the transverse curve is defined between the first location and the rear coupling point. In a different aspect, the working machine can include a second hydraulic actuator pivotally coupled by one end to the boom arm and a second end to the work tool, where the first and second hydraulic actuators each include a rod that extends between a stowed position and an extended position, and the corresponding pivoted movement of the upper link, lower link and first hydraulic actuator in relation to the boom arm induces movement of the work tool along the elevation path, between the first position and the second position. Correlatively, the movement of the work tool along the elevation path defines an elevation curve relative to a pivot pin coupling the work tool and the boom arm to each other, so that the elevation curve has at least one first region corresponding to the first, a second region corresponding to the second position, and a third region corresponding to a position defined between the first and second positions. The elevation curve can have a first ramp defined in the first region, a second ramp defined in the second region, and a third ramp defined in the third region, so that the first ramp and second ramp are greater than the third ramp.
    [0009] [009] In another embodiment of this invention, a lift connection assembly is provided for a work machine having a work tool. The lift link assembly includes a chassis, a boom arm, an upper link, a lower link and a hydraulic actuator. The boom arm is configured to be pivotally coupled to the work tool, and has a surface that defines a longitudinal axis. The upper link has a first end pivotally attached to the chassis and a second end pivotally attached to the boom arm. The lower link has a first end pivotally attached to the chassis and a second end pivotally attached to the boom arm. The hydraulic actuator has a rod pivotally attached to the boom arm and moves between a retracted and an extended position. The hydraulic actuator is also coupled to the chassis. The upper connection, lower connection and hydraulic actuator are individually spaced from the longitudinal axis.
    [0010] [0010] In one aspect, the upper connection is deflected from the longitudinal axis by a first deviation distance and the hydraulic actuator is deflected from the longitudinal axis by a second deviation distance, where the first deviation distance is greater than the second distance deviation. In another aspect, the lower link is deflected from the longitudinal axis by a third deviation distance, where the third deviation distance is less than the first deviation distance. In another aspect, the upper connection may include a transverse fold defined therein, between the first end and the second end. In this regard, the upper connection may include a rear coupling point defined between the first end and the second end, so that the transverse fold is defined between the second end and the rear coupling point. In another aspect, the upper link is pivotally coupled to the boom arm in a first location, the lower link is pivotally attached to the boom arm in a second location, and the rod is pivotally attached to the boom arm in a third location. The first location and the second location can be spaced from each other by a first distance, the second location and third location can be spaced from each other by a second distance, and the first location and the third location can be spaced from each other by a third distance. Here, the first distance and the second distance are individually greater than the third distance.
    [0011] [0011] In another embodiment, a connection set is provided for a working machine. The set includes a chassis, a boom, a hydraulic actuator, a first connection, and a second connection. The hydraulic actuator has a rod that extends between a retracted position and an extended position, where the hydraulic actuator is pivotally attached to the chassis and the rod is pivotally attached to the boom arm. The first connection has a first end pivotally attached to the chassis and a second end pivotally attached to the boom arm. The second connection has a first end pivotally attached to the chassis and a second end pivotally attached to the boom arm. The second connection also includes a transverse fold defined therein, between the first end and the second end.
    [0012] [0012] In one aspect of the connection set, the boom arm defines a longitudinal axis and the first connection, second connection and the hydraulic actuator are spaced from the longitudinal axis. In this regard, the second connection can be deviated from the longitudinal axis by a first deviation distance and the hydraulic actuator can be deviated from the longitudinal axis by a second deviation distance, where the first deviation distance is greater than the second deviation distance . In addition, the first connection is deviated from the longitudinal axis by a third deviation distance, where the third deviation distance is less than the first deviation distance. In another aspect, the first connection is pivotally coupled to the boom arm in a first location, the second connection is pivotally attached to the boom arm in a second location, and the rod is pivotally attached to the boom arm in a third location. Here, the first location and the second location are spaced from each other by a first distance, the first location and the third location are spaced from each other by a second distance, and the second location and the third location are spaced from each other by a third distance, where the first distance and the second distance are individually greater than the third distance. Brief description of the drawings
    [0013] [0013] The above-mentioned aspects of the present invention and the manner of obtaining them will become more apparent and the invention itself will be better understood by reference to the following description of the embodiments of the invention, taken in conjunction with the accompanying drawings, in which : Figure 1 is a perspective view of a skid steer loader; Figure 2 is a schematic front view of a conventional boom arm and link assembly for a working machine; Figure 3 is a schematic side view of an exemplary embodiment of a conventional boom arm and connection assembly; figure 4 is a partial perspective view of the boom arm and connection assembly of figure 3; Figure 5 is a top view in profile of the boom arm and connection set of Figure 3; Figure 6 is a schematic front view of a hydraulic actuator of the boom arm and connection assembly in an extended position; Figure 7 is a graphical representation of the lifting path of the hinge pin for a working machine; and Figure 8 is a graphical representation of the boom breaking force relative to the lifting height of a working machine.
    [0014] [0014] Corresponding reference numbers are used to indicate corresponding parts in all views. Detailed Description
    [0015] [0015] The embodiments of the present invention described below are not exhaustive or limiting the invention to the precise forms in the detailed description below. Rather, the embodiments have been chosen and described so that someone skilled in the art can appreciate and understand the principles and practices of the present invention.
    [0016] [0016] With reference to figure 1, an exemplary embodiment of a machine, such as a skid steer loader 100 is shown. The invention is not limited to a skid steer loader, but on the contrary, it can include any agricultural, construction or forestry machine. The skid steer loader 100 may be provided with a mechanism for engaging the floor to move along the floor. In Figure 1, this mechanism comprises a pair of front wheels 102 and a pair of rear wheels 104. In another aspect, like a compact track loader, the mechanism for engaging with the floor can be a traction track arranged on each side of the machine. On a skid steer loader, the operator can manipulate controls inside the cab 112 to steer the wheels to the right or left side of the machine 100 at different speeds, thereby steering the machine 100 in a conventional manner.
    [0017] [0017] Machine 100 can also be provided with an implement or work tool to perform a desired operation. In figure 1, the skid steer loader 100 includes a loader bucket 106 to collect material therein and transport it to a desired location. Loader bucket 106 can be pivotally coupled to a front portion of a pair of boom arms 108 positioned on each side of the machine 100. A pair of bucket tilting hydraulic actuators 114 can be extended between bucket 106 and boom arms 108 to control the tilted orientation of the bucket 106 relative to the boom arms 108. Each hydraulic actuator 114 may include a cylinder rod that acts back and forth within a cylinder in response to a load on hydraulic pressure. By acting on hydraulic tilt actuators 114, the operator can tilt bucket 106 to unload material.
    [0018] [0018] In figure 1, the loader bucket 106 is shown at a minimum height. To raise bucket 106, each of the pair of boom arms 108 is connected to an upper link 110 in a first location 122 and a lower link 118 in a second location 124. The upper link 110 and the lower link 118 are also coupled to a main chassis 116 of the end loader 100 at opposite ends from which each connects to the boom arm 108. A hydraulic actuator 120 is pivotally secured by one end to the main chassis 116 and coupled to the boom arm 108 at one end thereof opposite. The hydraulic actuator 120 connects to the boom arm 108 at a third location 126. The first location 122, second location 124 and third location 126 are approximately equidistant from each other.
    [0019] [0019] With reference to figure 2, a conventional arrangement of an elevation connection assembly 200 is shown. Assembly 200 includes a front end 202 and a rear end 204, where an implement or work tool (not shown) can be attached to the front end 202 of the machine. In particular, the implement or work tool can be actuated hydraulically by a pair of hydraulic actuators 214, The implement or work tool (not shown) can be coupled to a machine frame at a hinge pin location 214. The location and pivot pin 214 is the location where the implement or work tool is pivotally connected to the boom arm 108 of the machine. In figure 2, connection set 200 includes a pair of boom arms 108, one on each side of the machine.
    [0020] [0020] On each side of the machine, the boom arm 108 is pivotally coupled to the upper connection 110, lower connection 118 and hydraulic actuator 120. In the conventional arrangement in figure 2, a longitudinal axis is identified by reference number 210. The axis 210 passes through each hydraulic actuator 120 and its corresponding rod 208. As shown, shaft 210 also passes through each boom arm 108, thus showing hydraulic actuator 120 and rod 208 aligned with boom arm 108. In addition furthermore, the hydraulic actuator 120 is bypassed from the upper connection 110 and the lower connection 118 in this arrangement.
    [0021] [0021] To accommodate hydraulic actuator 120 and rod 208, particularly when hydraulic actuator 120 acts between an extended position and a stowed position, each of the pair of boom arms 108 includes a first portion 212 and a second portion 206. A first portion 212 has a first thickness and the second portion 206 has a second thickness, where the second thickness is less than the first thickness. In other words, the boom arm 108 includes a recessed area defined by its second portion 206. The recessed portion 206 provides spacing for the actuator 120 to act for different positions. The hydraulic actuator 120 is connected to the boom arm 108 at a third connection point 126 defined in the recessed portion of the boom arm 108.
    [0022] [0022] The conventional connection set of figure 2 has a limited boom breaking force, or force generated at the cutting edge of the bucket. As defined above, the bucket's breaking force is the force exerted at the floor level by the bucket or work tool to break or loosen material from a compacted pile of material. For example, if a skid steer loader is collecting debris from a compact pile of debris, the breakout force is the force that the bucket exerts on the pile to break or loosen debris from the pile. In many skid steer loaders, there is a trade-off between having a great breaking force and being able to lift a load to a higher height. In other words, for a conventional skid steer loader to have a greater breaking force, it must have a limited lift height and vice versa.
    [0023] [0023] In figures 3-6, the present invention provides an exemplary embodiment of a lift link assembly 300. The lift link assembly 300 may include a boom arm 304, an upper link 310, a lower link 312 and a hydraulic actuator 314. The hydraulic actuator 314 may include a cylinder rod that acts back and forth within a cylinder in response to a change in hydraulic pressure. The boom arm 304 can be coupled to an implement or work tool at a pivot pivot location 306. One or more hydraulic actuators can also be coupled by one end 308 to a frame or chassis 302 and by an end opposite the implement or work tool. The one or more hydraulic actuators can provide hydraulic force to move the implement or work tool. In particular, the one or more hydraulic actuators 308 pivot relative to the boom arm 304, so that the lift assembly 300 and hydraulic actuators 308 can raise the implement or work tool from the floor level to a maximum lift height. along an elevation trajectory. This will be explained in more detail with reference to figure 7.
    [0024] [0024] The upper link 310 can be pivotally coupled to the boom arm 304 at a first connection point 324 and the lower link 312 can be pivotally attached to the boom arm 304 at a second connection point 326. Similarly, the hydraulic actuator 314 can be pivotally coupled to the boom arm 304 at a third connection point 328. As shown in figure 3, the first connection point 324, the second connection point 326 and the third connection point 328 are arranged individually within an inner surface 330 of the boom arm 304. In other words, in figure 3, the inner surface 300 is arranged towards the inside of the machine and each of the upper connection 310, lower connection 312 and hydraulic actuator 314 are pivotally coupled to the arm of boom 304 at locations deviated from the inner surface 330 or inside the boom arm 304. This is further shown in figures 4 and 5 and commented below.
    [0025] [0025] Furthermore, the locations of the first connection point 324, second connection point 326 and third connection point 328 in relation to each other are different from those in connection set 200 of figure 2, that is, the first connection point connection 324 is arranged more closely adjacent to the third connection point 328. More specifically, the first connection point 324 and second connection point 326 are spaced from each other by a first distance D1, and the second connection point 326 and third point connection points 328 are separated from each other by a second distance D2. Likewise, the first connection point 324 and third connection point 328 are spaced from each other by a third distance D3. In one aspect, the first distance and the second distance can be approximately the same. In another aspect, the first distance and the second distance may be different from each other, but both are greater than the third distance. In other words, the three distances are not the same, so the connection points are not approximately equidistant from each other. In a different aspect, the first and second distance s can be at least twice the third distance. In another aspect, the first and second distances are three times or more than the third distance.
    [0026] [0026] With reference to figure 3, the upper connection 310 is also coupled to the frame or chassis 302 of the machine. Here, the upper link 310 has a first end coupled to the frame or chassis 302 at a first location and pivot 316 and a second end coupled to the first connection point 324. The first pivot location 316 is arranged along a tower portion rear 318 of the frame or chassis 302. The upper link 310 may have a substantially L-shaped structure, in which the pivot location 316 is at a first end, the first connection point 324 is at the second end, and a rear coupling 322 disposed between them. In figure 4, for example, the rear coupling point 332 can be used to couple the upper connection 310 to a frame member 408 that extends between the upper connection 310 on the left side of the machine and the upper connection 310 on the side machine right. This allows the machine to operationally raise and lower the implement or work tool in a controlled manner using a connection set 300 on both sides of the machine.
    [0027] [0027] The bottom link 312 can also be pivotally coupled to the machine frame or chassis 302 at a second pivot location 320. Similarly, hydraulic actuator 314 can be pivotally coupled to the frame or chassis 302 at a third pivot location 322. Therefore, the upper link 310, lower link 312 and hydraulic actuator 314 are pivotally coupled to the frame or chassis 302 of the machine and to the boom arm 304. As previously described, the machine can include a lift link assembly 300 over its two sides, so that the machine includes at least two boom arms 304, upper connections 310, lower connections 312 and hydraulic actuators 314.
    [0028] [0028] With reference now to figures 4 and 5, the inner surface 330 of the boom arm 304 is defined as planar along line 404. As shown, the upper connection 310, lower connection 312 and hydraulic actuator 314 are arranged offset from the line 404 in a direction indicated by arrow 406. In addition, a stem 400 of hydraulic actuator 314 is coupled to boom arm 304 at a third connection point 328. In figure 5, stem 400 and hydraulic actuator 314 can be deflected from the boom arm 304 for a distance DA. Similarly, the lower link 312 is coupled to the boom arm 304 at a second connection point 326 and can be deflected from the boom arm 304 by approximately the same distance DA. In other words, the hydraulic actuator 314 and the bottom connection 312 can be deflected towards the center line of the machine (i.e., inside the machine) by approximately the same distance DA. Because the first connection point 324 and third connection point 328 are arranged very close to each other, however, the upper connection 310 can be deflected from the boom arm 304 by a distance DB. Here, the distance DA is greater than DB, so that the pivoted movement of the upper connection 310 or the hydraulic actuator 314 does not result in any interference between the two connections. In addition, when the boom arms 304 move the implement or work tool between a floor position and a maximum lift height position, the additional deviation of the upper connections 310 from the boom arm 304 allows the entire set of lift link 300 moves and pivots in relation to each other without any contact or interference between any two of the links.
    [0029] [0029] As shown further in figures 4 and 5, the upper connection 310, lower connection 312 and hydraulic actuator 314 can be arranged substantially parallel to the plane defined by line 404 and, therefore, the upper connection 310, lower connection 312 and actuator hydraulic 314 can be arranged, at least partially, substantially parallel to the inner surface 330 of the boom arm 304. In addition, in one aspect, the bottom link 312 and the hydraulic actuator 314 can be defined in a foreground, and the top link 310 can be set in a background that is offset from the foreground. Alternatively, the upper connection 310 can be defined in the foreground, the lower connection 312 can be defined in the foreground and the hydraulic actuator 314 can be defined in a third plan, where the foreground, background and third plan are substantially parallel, but deviated from each other.
    [0030] [0030] In figures 4 and 5, in addition to the upper connection 310 being deviated from the boom arm 304 by a greater distance than the hydraulic actuator 314 and lower connection 312, the upper connection 310 may also include a transverse fold 402 defined therein. The transverse fold 402 can be defined between the first connection point 324 and the rear coupling point 332. In other words, the transverse fold 402 is defined in the upper connection 310 at a location closer to the first connection point 324 instead of the first pivot location 316. In the exemplary connection set 300, the upper connection 310 is coupled to the boom arm 304 at a location adjacent to or closer to the location where the hydraulic actuator stem 400 engages the boom arm 304 (or (ie, the relative proximity of the first connection point 324 to the third connection point 328). Due to the close proximity of both connection points, the transverse bend 402 allows the hydraulic actuator 314 to extend and retract without contacting the upper connection 310. In most conventional connection assemblies, the upper connection and hydraulic actuator are spaced apart from each other. another over a distance so that potential interference between connections when the boom arm moves is not a problem. However, in order to obtain the desired elevation curve and elevation height of the exemplary elevation link assembly 300, the first connection point 324 and the third connection point 328 can be arranged very close to each other, due to the defined transverse bend 402 on the upper connection 310.
    [0031] [0031] With reference again to figure 2 of the conventional connection set 200, the hydraulic actuator / actuator 120 is shown in an extended position, in which the actuator 120 and stem 208 are aligned or overlapping a recessed portion 206 of the arm boom 108. The recessed portion of the boom arm 108 is a necessity in the conventional assembly 200 due to the positioning and location of the connection point 126 between the hydraulic actuator 120 and the boom arm 108. This, however, reduced the maximum height of elevation and limited the amount of potential breaking force of the machine. Additionally, the recessed hold of the boom arm 304 reduced the total strength of the boom arm 108, thereby limiting the lifting height, breaking force and overall machine productivity.
    [0032] [0032] In figures 5 and 6, however, the positional relationship of the hydraulic actuator 314 in relation to the boom arm 304 is shown for the example connection set 300. Here, each hydraulic actuator 314 is arranged deviated towards the center line of the machine 604 from the respective boom arm 304. In figure 6, for example, the connection set 300 is in an extended position 600, while in figure 5 it is in a retracted position 500. As a result, the boom arm 304 it may include a reinforced portion 602 that does not include a recessed area. The boom arm 304 provides more resistance, and the connection set 300, as a whole, can obtain greater breaking force and maximum lifting height.
    [0033] [0033] Another aspect of the positional relationship of the hydraulic actuator 314 in relation to the boom arm 304 is the greater visibility for the machine operator. In the conventional connection set of figure 2, when connection set 200 moved to a position of maximum lifting height, the boom arm 108 and hydraulic actuator 120 were positioned in different horizontal planes in relation to each other. In other words, the hydraulic actuator 120 is positioned substantially below the boom arm 108 on both sides of the machine, so that the machine operator had limited or reduced external view of both the right and left sides of the machine. As shown in figure 3, however, the third connection point 328 allows the hydraulic actuator 314 to be substantially aligned in one direction or horizontal plane with the boom arm 304. In this way, when the connection assembly 300 moves to a position of maximum lifting height, the area occupied by the boom arm 304 is also occupied by the hydraulic actuator 314, thus allowing greater external visibility from both sides of the machine.
    [0034] [0034] In addition to some of the advantages described above, the exemplary lift link assembly 300 can also provide additional benefits for breakout force and lift height. With reference to figure 7, a non-limiting example of a curve and elevation having the exemplary connection set 300 is shown in graphical representation 700. In particular, a first elevation curve 702 is shown by a Series 323E compact track loader of Deere & Company. The first lift curve 702 is representative of a machine having the exemplary lift link assembly 300. A second lift curve 704 is provided for a machine having a more conventional lift link assembly.
    [0035] [0035] In figure 7, the first and second curves include a floor level height or position represented by a point 712 in the graphical representation 700. The height corresponds to the height of the articulation pin, where the articulation pin 306 is shown in figure 3. The first curve 702 is an illustration of the path taken by the articulation pin 306 from a floor level position (ie point 712) to its maximum elevation height position (ie point 708). In addition, the second curve 704 having the conventional lift connection has the maximum lift height corresponding to point 714 in the graphical representation 700. As shown, the first curve 702 can achieve a higher maximum lift height compared to the second curve 704 when the maximum lift height point 708 is offset to the right of the lift height point 714.
    [0036] [0036] In addition, the lifting linkage set 300 provides a lifting curve 702 that has a better "reach capability", that is, distance between the rear axle and the hinge pin 306. More specifically, the lifting curve 702 can include three defined regions. In a first region 706, the elevation curve 702 has a first ramp 716 much larger than the ramp of the second curve 704. This can allow the machine to obtain greater breaking force at or near the floor level. The breaking force can be much greater for the first lifting curve 702, due to the repositioning of the hydraulic actuator 314 in relation to the boom arm 304. In particular, the repositioning or deviated location of the hydraulic actuator 314 can obtain a longer arm and moment or advantageously, lever over the implement or work tool through the entire lifting path.
    [0037] [0037] The first elevation curve 702 moves from a first region of increasing ramp to a second region 718 in which the curve begins to level and has a lower growth ramp compared to the first V ramp 716. As the link assembly 300 moves to a maximum lift height position 708, the first lift curve 702 moves to a third region 710 in which the ramp begins to increase more slightly. Thus, in the second region 718, the elevation curve 702 includes a partial inflection point or less increasing ramp point compared to the first region 706 and the second region 710. As a result, based on the embodiment of figure 7, the exemplary lift link assembly 300 can provide better breaking force in the first region 706 and a higher maximum lift height 708 in the third region, while also achieving better “reach capability” compared to the conventional link assembly illustrated by the second curve 704.
    [0038] [0038] In figure 8, the boom breaking force of the exemplary lift connection assembly 300 is shown in a second graphic representation 800. Here, the curve 802 has a substantially concave shape, having a first portion 804 of increasing ramp, in which the breaking force is determined. In this first region 804, curve 802 illustrates where the machine has a breaking force of approximately 2,200 kgf. The force peaks in a second region 806 before falling in a third region 808. By comparison, and in terms of English units, a conventional lift link assembly can achieve a breaking force of approximately 3700 pounds, where the exemplary lift link assembly 300 is capable of reaching a breaking force of 4,700 pounds. Here, the hydraulic pressure force intensity of the hydraulic actuators remains the same, but the exemplary design of the connection set 300 allows greater breaking force close to the floor level, better maximum lifting height, and greater “reach capacity” over the conventional connection set.
    [0039] [0039] Although exemplary embodiments incorporating the principles of the present invention have been described above, the present invention is not limited to the described embodiments. Instead, this application is intended to cover any variation, use or adaptation of the invention using its general principles. In addition, this application is intended to cover such departures from the present invention when within the known or normal practice in the technique to which this invention belongs and which fall within the limits of the appended claims.
    权利要求:
    Claims (9)
    [0001]
    Lifting link assembly for a work machine having a work tool, the movable lifting link assembly for lifting the work tool from a position at ground level to a maximum lifting height, the lifting link assembly comprising : a frame (302); a boom arm (304) configured to be pivotally coupled to the frame and the work tool, the boom arm having an inner surface facing the frame, the inner surface defining a longitudinal axis; an upper connection (310) having a first end and a second end, the first end configured to be pivotally coupled to the frame and the second end pivotally coupled to the boom arm (304) at a first location (324); a lower connection (312) having a first end and a second end, the first end configured to be pivotally coupled to the frame and the second end pivotally coupled to the boom arm (304) at a second location (326); a hydraulic actuator (314) pivotally coupled to the boom arm (304) at a third location (328), wherein the first location (324) and the second location (326) are spaced apart by a first distance (D1), the second location (326) and the third location (328) are spaced apart by a second distance (D2 ), and the first location (324) and the third location (328) are spaced apart by a third distance (D3); wherein, the first distance (D1) is at least twice the third distance (D3), and the second distance (D2) is at least twice the third distance (D3); and wherein the upper link (310), the lower link (312), and the hydraulic actuator (314) are positioned offset from the inner surface; characterized by the fact that the third location (328) is positioned below the first location so that the hydraulic actuator is aligned with the boom arm (304) along a horizontal plane.
    [0002]
    Lifting connection assembly according to claim 1, characterized by the fact that the first distance (D1) and the second distance (D2) are at least three times the third distance (D3).
    [0003]
    Lifting connection assembly according to claim 2, characterized in that the lower connection (312) is deflected from the internal surface (404) by a third deviation distance, where the third deviation distance is less than the first deviation distance.
    [0004]
    Lifting connection assembly according to claim 1, characterized in that the upper connection (310) comprises a fold in the direction of the internal surface (402) defined therein, between its first end and the second end.
    [0005]
    Lifting connection assembly according to claim 4, characterized by the fact that: the upper link (310) comprises a rear coupling point (332), arranged to allow coupling to an additional upper link, defined between the first end and the second end of the upper link; and, the fold (402) is defined between the first location (324) and the rear coupling point (332).
    [0006]
    Lifting connection set for a working machine, comprising: a frame (302); a boom arm (304); a hydraulic actuator (314) having a stem (400) extending between a retracted position and an extended position, where the hydraulic actuator (314) is pivotally coupled to the frame (302) and the stem (400) is pivotally coupled to the arm lance (304); a first connection (310) having a first end pivotally coupled to the frame (302) and a second end pivotally coupled to the boom arm (304); and, a second connection (312) having a first end pivotally coupled to the frame (302) and a second end pivotally coupled to the boom arm (304), where the second connection (312) includes a defined transverse fold between the first end and the second far end, wherein the upper link (310), the lower link (312), and the hydraulic actuator (314) are positioned offset from the boom arm (304); wherein the upper connection (310) is pivotally coupled to the boom arm (304) in a first location (324), the second connection (312) is pivotally coupled to the boom arm (304) in a second location (326), and the rod (400) is pivotally coupled to the boom arm (304) at a third location; wherein the first location (324) and the second location (326) are spaced apart by a first distance (D1), the first location (324) and the third location (328) are spaced apart by a second distance (D2 ), and the second location (326) and the third location (328) are spaced apart by a third distance (D3), where the first distance (D1) and the second distance (D2) are each greater than the third distance (D3); wherein, the first distance (D1) is at least twice the third distance (D3), and the second distance (D2) is at least twice the third distance (D3); and wherein the upper link (310), the lower link (312), and the hydraulic actuator (314) are positioned offset from the inner surface; characterized by the fact that the third location (328) is positioned below the first location so that the hydraulic actuator is aligned with the boom arm (304) along the horizontal plane.
    [0007]
    Connection set according to claim 6, characterized by the fact that: the boom arm (304) defines a longitudinal axis; and, the first connection (310), the second connection (312) and the hydraulic actuator (314) are spaced from the longitudinal axis.
    [0008]
    Connection set according to claim 7, characterized in that the second connection (312) is deviated from the longitudinal axis by a first deviation distance and the hydraulic actuator (314) is deviated from the longitudinal axis by a second deviation distance , where the first deviation distance is greater than the second deviation distance.
    [0009]
    Connection set according to claim 8, characterized in that the first connection (310) is deviated from the longitudinal axis by a third deviation distance, where the third deviation distance is less than the first deviation distance.
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    同族专利:
    公开号 | 公开日
    EP2762642A3|2015-06-10|
    US20150159342A1|2015-06-11|
    US9988786B2|2018-06-05|
    EP2762642A2|2014-08-06|
    CN103967062A|2014-08-06|
    RU2637684C2|2017-12-06|
    MX2013009107A|2014-07-29|
    CN103967062B|2018-09-18|
    BR102013017182A2|2018-12-04|
    MX336603B|2016-01-25|
    US9017005B2|2015-04-28|
    US20140212254A1|2014-07-31|
    EP2762642B1|2020-03-11|
    RU2013136198A|2015-02-10|
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    法律状态:
    2018-12-04| B03A| Publication of an application: publication of a patent application or of a certificate of addition of invention|
    2018-12-18| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-12-31| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2021-02-02| B09A| Decision: intention to grant|
    2021-03-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 03/07/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/754,074|2013-01-30|
    US13/754,074|US9017005B2|2013-01-30|2013-01-30|Skid steer loader lift linkage assembly|
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