Steering auxiliary control device of crawler walking mechanism

Abstract

The utility model belongs to the technical field of crawler walking machinery, and particularly relates to a steering auxiliary control device of a crawler walking mechanism, which comprises a control rod connected with an input end of a lever, and when the control rod linearly moves along a rod core in a reciprocating manner to drive the lever to rotate around a hinged shaft core, a valve rod of a steering valve connected with an output end of the lever moves along with the lever. The control rod used for driving the lever to rotate is additionally arranged, and the control rod serving as a rigid rod piece has higher strength and reliability and can push or pull the lever, so that the effectiveness of controlling the rotating speed and the rotating angle of the lever is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of crawler traveling machinery, in particular to a steering auxiliary control device of a crawler traveling mechanism. Background Art

[0002] In order to adapt to complex working surfaces, agricultural machinery usually adopts crawler walking mechanisms. In the prior art, when the crawler walking mechanism is turned, the operator needs to swing the operating handle to pull the pull wire, which drives the lever to rotate. The lever pushes the steering power valve stem to achieve braking of the corresponding crawler, so that there is a speed difference between the crawler tracks on both sides, thereby achieving the steering of the crawler walking mechanism. During the operation, it is often necessary to change the working direction or angle of the agricultural machinery. However, the swinging operation of the operating handle is very laborious and prone to operator fatigue. The turning radius of the walking mechanism is achieved by controlling the swing amplitude and swing speed of the operating handle. If the swing amplitude of the operating handle is large and the swing speed is fast, the pull wire will pull the lever to rotate with a large amplitude and a fast rotation speed, and the turning radius of the walking mechanism will be small. However, the pull wire will gradually loosen with the increase of the number of uses and years, making it difficult to accurately control the turning radius of the walking mechanism, further increasing the difficulty of operation. Utility Model Content

[0003] The purpose of the utility model is to provide a steering auxiliary control device for a crawler traveling mechanism, which can reduce the difficulty of steering operation of the crawler traveling mechanism of agricultural machinery.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a steering auxiliary control device for a crawler walking mechanism, including a control rod connected to the input end of a lever. When the control rod moves back and forth along its rod core to drive the lever to rotate around its hinge axis, the steering valve stem connected to the output end of the lever moves accordingly.

[0005] The control rod is a valve stem of a control valve, and the control valve is a solenoid valve, a hydraulic valve or a mechanical valve.

[0006] The rod core of the control rod is perpendicular to the axis core of the hinge shaft of the lever, and the control rod and the hinge shaft are arranged at intervals.

[0007] The base plate is provided with an articulated shaft which is articulated with a lever. The axis core of the articulated shaft is arranged perpendicular to the base plate surface. The control lever whose rod core is arranged parallel to the base plate surface is arranged beside the articulated shaft.

[0008] The base plate includes a vertical plate, which is provided with a wire pulling hole with the hole core direction pointing to the lever input end. The wire pulling hole is an upper opening hole, and its hole area is a closed shape with a larger bottom and a smaller top; the plate body of the vertical plate adjacent to the hinge axis is higher than the side away from the hinge axis, and the plate edge of the base plate is folded obliquely upward to form the vertical plate, and the opening of the wire pulling hole is obliquely pointed to the side away from the base plate and the hinge axis.

[0009] The hinge shaft is arranged adjacent to one side edge of the base plate; in the assembled state, the input end of the lever moves above the plate area of ​​the base plate, and the output end protrudes outward from the plate edge of the base plate adjacent to the hinge shaft and is connected to the steering valve.

[0010] A steering valve is provided on the base plate, and the steering valve and the control rod are respectively arranged on two sides of the hinge shaft which are opposite to each other.

[0011] The control rod is located between the hinge shaft and the vertical plate. In the assembled state, the control rod and the vertical plate are located on the same side of the lever input end, and the control rod and the cable through hole are arranged in a height-staggered manner.

[0012] The hinge shaft is located between the control rod and the vertical plate. In the assembled state, the control rod and the vertical plate are respectively placed on both sides of the lever input end.

[0013] The control valve is fixedly connected to the base plate. In the assembled state, the control rod pushes the lever body to drive the lever to rotate, or the control rod is connected to the corresponding strip hole / groove set on the lever body. When the control rod is telescopically displaced, the control rod or the connecting part is displaced along the guide in the strip hole / groove.

[0014] The control valve is rotatably connected to the base plate. In the assembled state, the control rod and the lever are hingedly connected, and the hinge axis core of the control valve and the base plate is parallel to the hinge axis core of the control rod and the lever.

[0015] A waterproof cover is sealed and connected to the base plate. The control valve is arranged in the enclosed chamber between the waterproof cover and the base plate. The two oppositely arranged cover walls of the waterproof cover are respectively provided with holes for the control rod and the wiring harness connector to pass through. The edge of the cover body of the waterproof cover and the edge of the hole are respectively provided with annular grooves for accommodating O-rings.

[0016] Compared with the existing technology, the present invention has the following technical effects: a control rod is added to drive the lever to rotate. As a rigid rod, the control rod has higher strength and reliability, and can push or pull the lever, thereby improving the effectiveness of controlling the rotation speed and rotation angle of the lever. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 is a top view of the first embodiment;

[0019] Figure 2 This is a top view of the first embodiment when the waterproof cover is removed;

[0020] Figure 3 yes Figure 2 Schematic diagram of top view of assembly state;

[0021] Figure 4 It is the left diagram of embodiment 1;

[0022] Figure 5 It is a three-dimensional schematic diagram of the waterproof cover;

[0023] Figure 6 This is a top view of the second embodiment when the waterproof cover is removed;

[0024] Figure 7 yes Figure 6 Schematic diagram of the assembly state;

[0025] Figure 8 This is a top view of the third embodiment when the waterproof cover is removed;

[0026] Figure 9 This is a top view of the fourth embodiment when the waterproof cover is removed;

[0027] Figure 10 yes Figure 9 Left view of;

[0028] Figure 11 This is a top view of another embodiment of the fourth embodiment when the waterproof cover is removed;

[0029] Figure 12 yes Figure 11 Left view of . DETAILED DESCRIPTION

[0030] The specific implementation of the present invention will be further described in detail below through description of embodiments in conjunction with the accompanying drawings. Example 1

[0031] A steering assist control device for a crawler walking mechanism includes a control rod 21 connected to the input end of a lever. When the control rod 21 moves back and forth along its rod core to drive the lever to rotate around its hinge axis, the steering valve stem connected to the output end of the lever moves accordingly. Figure 3 As shown, the lever is hingedly connected at the hinge axis 11. In the figure, the lever section located below the hinge axis 11 is the input section, and the lever section located above the hinge axis 11 is the output section. The control lever 21 engages with the lever's input section, and the steering valve engages with the lever's output section. In the illustrated embodiment, when the control lever 21 moves to the left, it causes the lever to rotate clockwise. The output end of the lever pushes the valve stem of the steering valve to the right, thereby controlling the transmission. It should be noted that the output end of the steering valve is connected to the transmission's brake fork, which is conventional technology and the specific implementation will not be detailed here.

[0032] To ensure that the control rod 21 can stably and reliably push or pull the lever to rotate and avoid interference between the rod bodies when the two are displaced in coordination, the core of the control rod 21 is perpendicular to the core of the hinge shaft 11 of the lever, and the control rod 21 and the hinge shaft 11 are arranged at intervals.

[0033] To facilitate operation of the control lever 21, in this embodiment, the control lever 21 serves as the valve stem of the control valve 20. The control valve 20 can be a common valve body such as a solenoid valve, hydraulic valve, or mechanical valve. It can be connected to the control components via a wiring harness or wireless signal, making it easy for operators to operate the control valve from the cab or a nearby location. In a specific implementation, the control valve 20 can be fixedly connected to the base plate 10, so that the rod end of the control lever 21 contacts and engages with the lever in the initial position. In this way, the control lever 21 pushes against the lever body to drive the lever to rotate. To further prevent the control lever 21 from dislocating from the lever, a strip hole or strip groove can be provided on the lever body corresponding to the control lever 21. The control lever 21 can be directly connected to the strip hole or strip groove, or the control lever 21 can be connected to the strip hole or strip groove via a connector. In this way, when the control lever 21 moves back and forth along its rod core, the control lever 21 or the connector moves along its guide within the strip hole / strip groove, driving the lever to rotate accordingly. The control valve 20 can also be rotatably connected to the base plate 10. At the same time, the control rod 21 needs to be hingedly connected to the lever, and the hinge axis core of the control valve 10 and the base plate 10 should be parallel to the hinge axis core of the control rod 21 and the lever. In this way, when the control rod 21 moves back and forth along its rod core, the control rod 21 can swing accordingly, thereby ensuring smooth rotational displacement of the lever.

[0034] As attached Figure 1 、 2 In the embodiment shown, the length direction of the valve body of the control valve 20 is arranged parallel to the edge of the substrate 10. In specific implementation, according to the layout space or usage requirements, it can also be arranged as shown in the attached figure. Figure 3 As shown, the valve body length direction of the control valve 20 is arranged at an angle with the plate edge of the base plate 10.

[0035] In other embodiments, the control lever 21 may also be controlled by a connecting rod mechanism, so that the operating end of the connecting rod mechanism is located in the cab, thereby enabling convenient steering operations for the driver.

[0036] This embodiment further includes a base plate 10, on which is provided an articulated shaft 11 for articulating with the lever. The axis of the articulated shaft 11 is arranged perpendicular to the surface of the base plate 10, and the control rod 21, whose core is arranged parallel to the surface of the base plate 10, is disposed beside the articulated shaft 11. The articulated shaft 11 determines the installation position of the lever. By determining the installation position of the articulated shaft 11 and the control rod 21 on the base plate 10, the mating position of the lever and the control rod 21 can be determined. In this way, simply by installing the base plate 10 on an existing crawler traveling machine, the stability and reliability of the mating of the lever and the control rod 21 can be ensured, thereby improving the convenience of positioning and installing the auxiliary steering device.

[0037] In order to avoid the failure of the crawler walking mechanism to turn when the control rod 21 fails, when the input end of the lever is still connected to the cable C, in order to reliably guide the cable C, Figure 2As shown, in this embodiment, the base plate 10 includes a vertical plate 12, and the vertical plate 12 is provided with a wire through hole 13 with the hole core pointing to the lever input end. Figure 4 As shown, in order to facilitate the assembly and replacement of the pull wire C, the pull wire through hole 13 is an upper opening hole, and its hole area is in a closed shape with a larger bottom and a smaller top. Furthermore, in order to prevent the pull wire C from escaping from the upper opening of the pull wire through hole 13, the plate body of the vertical plate 12 adjacent to the hinge shaft 11 is higher than the side away from the hinge shaft 11, and the opening of the pull wire through hole 13 is obliquely pointed away from the base plate 10 and the hinge shaft 11. In order to facilitate the production and processing of the base plate 10, this embodiment makes the plate edge of the base plate 10 on the left side of the hinge shaft 11 folded obliquely upward to form the vertical plate 12. As shown in the attached figure Figure 3 As shown, for ease of operation, the input lever section of the lever is longer than the output lever section, and a cable C is connected to the end of the input lever section. In other embodiments, the cable C may be omitted, thereby eliminating the need for the vertical plate 12 or cable hole 13. Alternatively, the vertical plate 12 and cable hole 13 may be provided, with the wiring harness of the control valve 20 being routed through the cable hole 13 to guide and position the wiring harness of the control valve 20.

[0038] The vertical plate 12 and the control rod 21 for guiding the pull wire C are respectively connected to the input end of the lever. In this embodiment, the hinge shaft 11, the vertical plate 12, and the control rod 21 are arranged at intervals in the left and right directions of the base plate 10 in the figure, and the hinge shaft 11 is located between the control rod 21 and the vertical plate 12. Figure 3 As shown, in the assembled state, the control rod 21 and the vertical plate 12 are placed on both sides of the lever input end to avoid interference between the pull wire C, the vertical plate 12 and the control rod 21 and its components.

[0039] In specific implementation, the substrate 10 is arranged beside the steering valve. Figure 3 As shown, the upper edge of the base plate 10 is arranged adjacent to the steering valve. The input end of the lever is displaced within the plate area of ​​the base plate 10, and the output end protrudes outward from the edge of the base plate 10 adjacent to the hinge shaft 11 and is connected to the steering valve. In order to shorten the distance between the hinge shaft 11 and the steering valve stem, the external force required at the input end to drive the lever to rotate is reduced, so that the auxiliary steering function can be achieved with a relatively low-power control valve 20, thereby reducing production costs. Figure 2 As shown, in a preferred embodiment, the hinge shaft 11 is arranged adjacent to one side edge of the base plate 10 .

[0040] The working environment of agricultural machinery is relatively complex. In order to prevent the control rod 21 and its driving components from being eroded by rain and muddy water, the present embodiment is as shown in the attached figure. Figure 1 As shown, a waterproof cover 30 is sealed and connected to the substrate 10, and the control valve 20 is set in the enclosed chamber between the waterproof cover 30 and the substrate 10. Figure 5As shown, the two oppositely arranged walls of the waterproof cover 30 are respectively provided with holes 31 for the control rod 21 and the wiring harness connector to pass through. The edge of the cover body of the waterproof cover 30 and the edge of the hole 31 are respectively provided with annular grooves for accommodating O-rings. When in use, the sealing ring is clamped between the waterproof cover 30 and the base plate 10 or the rod body of the control rod 21 and the outer periphery of the wiring harness connector to achieve a sealed connection between the two. Example 2

[0041] The difference between this embodiment and the first embodiment is that the hinge shaft 11 and the vertical plate 12 are located on the same side of the control rod 21. Figure 3 As shown in the figure, the hinge shaft 11, the vertical plate 12, and the control rod 21 are arranged at intervals in the vertical direction. Specifically, in order to facilitate the operation of the pull wire C, the pull wire C is connected to the end of the input rod section of the lever hinged to the hinge shaft 11, and the control rod 21 should be located between the hinge shaft 11 and the vertical plate 12. The assembled and used state is shown in the attached figure. Figure 7 As shown, the control rod 21 and the vertical plate 12 are located on the same side of the lever input end, and the control rod 21 and the cable through hole 13 are arranged in a staggered manner to avoid interference between the cable C and the control rod 21 and its components.

[0042] When implementing it specifically, please refer to the attached Figure 7 As shown, a pin on control rod 21 passes through an arcuate hole in the lever. When control rod 21 moves leftward, the pin pulls the lever clockwise, causing the output end of A to push the valve stem of the steering valve rightward, thereby controlling the transmission. The end of cable C is sleeved onto a pin located at the input section of the lever. If control rod 21 fails and cannot be moved, cable C pulls the lever, causing it to rotate clockwise. The strip hole in the lever through which the pin on control rod 21 passes does not interfere with the pin, thus enabling cable C to control the transmission. Example 3

[0043] The difference between this embodiment and the first embodiment is that the steering valve is provided on the base plate 10, and the steering valve and the control rod 21 are respectively provided on two opposite sides of the hinge shaft 11. Figure 8 As shown, the base plate 10 is a flat plate, and the steering valve and the control rod 21 are respectively arranged on the upper and lower sides of the hinge shaft 11 in the figure, and are respectively connected to the input end and the output end of the lever. Example 4

[0044] The difference between this embodiment and the third embodiment is that the substrate 10 is a folded plate. Figure 9 、 10 As shown, the hinge shaft 11 is arranged adjacent to its folded edge, the control rod 21 and the hinge shaft 11 are located on the same plate body, and the steering valve is located on another plate body and adjacent to the hinge shaft 11. Figure 11 、 12In the embodiment shown, the plate edge above the base plate 10 is folded toward the overhanging end of the hinge shaft 11 to form a folding plate, and the plate body of the folding plate is arranged to avoid the hinge shaft 11. In this way, the steering valve is fixed on the folding plate, which can further reduce the distance between the hinge shaft 11 and the steering valve stem, thereby reducing the external force required at the input end when driving the lever to rotate.

Claims

1. A steering assist control device for a crawler walking mechanism, characterized in that: The invention comprises a control rod (21) connected to the input end of the lever (A). When the control rod (21) moves back and forth along its rod core to drive the lever (A) to rotate around its hinge axis, the valve stem of the steering valve (B) connected to the output end of the lever (A) moves accordingly.

2. The steering assist control device for a crawler traveling mechanism according to claim 1, characterized in that: The control rod (21) is a valve stem of the control valve (20), and the control valve (20) is a solenoid valve, a hydraulic valve or a mechanical valve.

3. The steering assist control device for a crawler traveling mechanism according to claim 1, characterized in that: The rod core of the control rod (21) is perpendicular to the axis core of the hinge shaft (11) of the lever (A), and the control rod (21) and the hinge shaft (11) are arranged at intervals.

4. The steering assist control device for a crawler traveling mechanism according to claim 1 or 2, characterized in that: The invention comprises a base plate (10), wherein a hinge shaft (11) is provided on the base plate (10) and is hingedly matched with a lever (A), wherein the axis core of the hinge shaft (11) is arranged perpendicular to the plate surface of the base plate (10), and a control rod (21) whose rod core is arranged parallel to the plate surface of the base plate (10) is arranged beside the hinge shaft (11).

5. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: The base plate (10) includes a vertical plate (12), and the vertical plate (12) is provided with a wire drawing hole (13) with a hole core direction pointing to the input end of the lever (A). The wire drawing hole (13) is an upper opening hole, and its hole area is in a closed shape with a larger bottom and a smaller top. The side of the vertical plate (12) adjacent to the hinge axis (11) is higher than the side away from the hinge axis (11), the edge of the base plate (10) is folded upward obliquely to form the vertical plate (12), and the opening of the wire through hole (13) is obliquely directed toward the side away from the base plate (10) and the hinge axis (11).

6. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: The hinge shaft (11) is arranged adjacent to a side edge of the base plate (10); in the assembled state, the input end of the lever (A) is displaced above the plate area of ​​the base plate (10), and the output end protrudes outward from the plate edge of the base plate (10) adjacent to the hinge shaft (11) and is connected to the steering valve (B).

7. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: A steering valve (B) is provided on the base plate (10), and the steering valve (B) and the control rod (21) are respectively arranged on two sides of the hinge shaft (11) that are opposite to each other.

8. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: The control rod (21) is located between the hinge shaft (11) and the vertical plate (12). In the assembled state, the control rod (21) and the vertical plate (12) are located on the same side of the input end of the lever (A), and the control rod (21) and the wire through hole (13) are arranged in a staggered manner.

9. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: The hinge shaft (11) is located between the control rod (21) and the vertical plate (12). In the assembled state, the control rod (21) and the vertical plate (12) are respectively placed on both sides of the input end of the lever (A).

10. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: The control valve (20) is fixedly connected to the base plate (10). In the assembled state, the control rod (21) pushes the rod body of the lever (A) to drive the lever (A) to rotate, or the control rod (21) is connected to a corresponding strip hole / slot provided on the rod body of the lever (A). When the control rod (21) is telescopically displaced, the control rod (21) or the connecting member is displaced along the guide in the strip hole / slot.

11. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: The control valve (20) is rotatably connected to the base plate (10). In the assembled state, the control rod (21) is hingedly connected to the lever (A), and the hinge axis of the control valve (20) and the base plate (10) is parallel to the hinge axis of the control rod (21) and the lever (A).

12. The steering assist control device for a crawler traveling mechanism according to claim 4, characterized in that: A waterproof cover (30) is sealedly connected to the base plate (10), and the control valve (20) is arranged in an enclosed chamber between the waterproof cover (30) and the base plate (10). Two oppositely arranged cover walls of the waterproof cover (30) are respectively provided with a control rod (21) and a hole (31) through which a wiring harness connector passes. An annular groove for accommodating an O-ring is respectively provided at the cover edge of the waterproof cover (30) and the edge of the hole (31).

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