Crawler tractor guide wheel adjustment device

Abstract

The application discloses a caterpillar tractor guide wheel adjusting device, which comprises a tractor frame and a guide wheel shaft assembly, and the two ends of the guide wheel shaft assembly are respectively used for mounting guide wheel hubs; the guide wheel adjusting device further comprises a swing shaft assembly, the swing shaft assembly comprises a swing shaft and an adjusting handle mounted on the swing shaft, the adjusting handle is rotatably mounted on the tractor frame through the swing shaft, the first end of the adjusting handle is used for mounting the guide wheel shaft assembly, and the second end of the adjusting handle can swing to adjust, so that the guide wheel shaft assembly at the first end of the adjusting handle is adjusted in position around the swing shaft. The device has the advantages of compact structure and convenient operation.

Description

Technical Field

[0001] This invention belongs to the field of agricultural machinery technology, and specifically relates to a guide wheel adjustment device for a tracked tractor. Background Technology

[0002] In the manufacturing of tracked tractors, errors in machining and parts assembly can cause different gaps between the tractor's guide wheels and the left and right sides of the track, which can easily lead to wear on the guide wheels and the track. Currently, the installation position of the guide wheels of most domestically produced tracked tractors is not adjustable, and the gap between them and the track cannot be changed according to requirements. This reduces the efficiency of the entire machine and the service life of the walking system. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art and to provide a guide wheel adjustment device for tracked tractors. This device has the advantages of compact structure and convenient operation.

[0004] The purpose of this invention is to provide a guide wheel adjustment device for a tracked tractor, including a tractor frame and a guide wheel axle assembly. Both ends of the guide wheel axle assembly are used to mount guide wheel hubs. The guide wheel adjustment device also includes a swing shaft assembly, which includes a swing shaft and an adjustment handle mounted on the swing shaft. The adjustment handle is rotatably mounted on the tractor frame via the swing shaft. The first end of the adjustment handle is used to mount the guide wheel axle assembly, and the second end of the adjustment handle is swingable for adjustment, thereby driving the guide wheel axle assembly at the first end of the adjustment handle to adjust its position around the swing shaft.

[0005] As a preferred embodiment, the tractor frame is provided with a shaft hole, and the swing shaft passes through the shaft hole and the mounting hole of the adjusting handle in sequence and is fixed to the end cover, so that the adjusting handle can be rotatably mounted on the tractor frame, thereby restricting the adjusting handle to only be able to rotate around the swing shaft.

[0006] As a preferred embodiment, the guide wheel adjustment device further includes an adjustment bolt group, which is installed at the second end of the adjustment handle and is used to swing the second end of the adjustment handle.

[0007] As a preferred embodiment, the adjusting bolt group is provided with at least one adjusting bolt on each side of the second end of the adjusting handle. The adjusting bolt passes through the corresponding screw holes of the adjusting handle from both sides. After passing through the corresponding screw holes, the adjusting bolt can abut against the corresponding limiting side plate of the tractor frame.

[0008] As a preferred embodiment, the guide wheel adjustment device further includes a locking assembly. After the position of the guide wheel shaft assembly is adjusted to the correct position, the locking assembly is used to lock and fix the adjusting bolt.

[0009] As a preferred embodiment, the locking assembly includes at least one locking plate, which has a locking hole that matches the shape of the bolt head of the adjusting bolt. After the locking hole is fitted onto the corresponding bolt head, the locking plate is fixed to the corresponding limiting side plate by a fastening bolt.

[0010] As a preferred embodiment, the central axis of the swing shaft is perpendicular to the central axis of the guide wheel shaft assembly.

[0011] As a preferred embodiment, the adjusting handle is rotatably mounted on the swing shaft via a bearing.

[0012] As a preferred embodiment, the swing shaft between the adjusting handle and the tractor frame is externally fitted with a washer to isolate the two.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects:

[0014] Firstly, this solution improves the structure by including a guide wheel axle assembly, an adjustment handle, and a swing shaft assembly. The guide wheel axle assembly is used to install the guide wheel hub and is installed at one end of the adjustment handle. The swing shaft serves as a fulcrum for adjusting the rotation of the adjustment handle and is used to adjust the position of the guide wheel axle assembly through a lever-like structure, thereby adjusting the relative position of the guide wheel hub and the track.

[0015] Secondly, considering the ease of adjustment of the adjustment handle and the convenience of fixing it after adjustment, this solution also provides an adjustment bolt assembly at the manual adjustment end of the adjustment handle. The adjustment handle has two threaded holes corresponding to the adjustment bolt assembly. The adjustment bolt assembly has at least one adjustment bolt on each side of the adjustment handle's rotation direction. The screw head of the adjustment bolt abuts against the limiting side plate of the tractor frame. When one adjustment bolt rotates, the adjustment handle will swing in the direction of adjustment of the handle. The adjustment bolt on the other side is loosened from the adjustment handle in advance and will not obstruct the rotation of the adjustment handle. When the adjustment is in place, the adjustment bolt on the other side is fixedly connected to the threaded hole of the adjustment handle again, thereby fixing the position of the adjustment handle from both sides.

[0016] Thirdly, this solution also considers that after the guide wheel axle assembly is adjusted to the correct position, the adjusting bolt may loosen with the use of the track, causing the position of the guide wheel axle assembly to wobble. Therefore, a locking component is also provided. The locking plate is provided with a locking hole corresponding to the shape of the bolt head. After the locking plate is fitted onto the bolt head, the locking plate is fixed by the fastening bolt, which can prevent the adjusting bolt from rotating arbitrarily, thereby limiting the position of the guide wheel axle assembly to remain unchanged after it is adjusted to the correct position. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the guide wheel adjustment device for tracked tractors described in this invention.

[0019] Figure 2 This is a schematic diagram of the swing shaft assembly of the guide wheel adjustment device for tracked tractors described in this invention.

[0020] Figure 3 This is a schematic diagram of the adjusting bolt group of the guide wheel adjusting device for tracked tractors according to the present invention.

[0021] The markings in the diagram are: 1. Adjusting handle; 11. First lever arm; 12. Second lever arm; 2. Guide wheel shaft assembly; 3. Swing shaft assembly; 31. Swing shaft; 32. End cover; 33. Bearing; 34. Washer; 4. Adjusting bolt assembly; 41. First adjusting bolt; 42. Second adjusting bolt; 5. Locking assembly; 51. Locking plate; 52. Fixing bolt; 10. Tractor frame; 20. Limiting side plate. Detailed Implementation

[0022] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0024] As shown in the figure, this embodiment provides a guide wheel adjustment device for a tracked tractor, including an adjustment handle 1, a guide wheel shaft assembly 2, and a swing shaft assembly 3. The adjustment handle 1 is mounted on the tractor frame 10 via the swing shaft assembly 3, forming a lever structure with the swing shaft assembly 3 as the fulcrum. The guide wheel shaft assembly 2 is fastened to the transverse circular hole at the front of the adjustment handle 1 by an interference fit. Both ends of the guide wheel shaft assembly 2 are connected to the guide wheel hub of the tractor by bolts, and the guide wheel shaft assembly 2 can be adjusted in position relative to the tractor frame 10, thereby driving the guide wheel hub mounted on the guide wheel shaft assembly 2 to adjust its position, so as to ultimately achieve the adjustment of the relative position between the guide wheel and the track.

[0025] In this embodiment, the swing shaft assembly 3 includes a swing shaft 31. A shaft hole for mounting the swing shaft 31 is provided on the tractor frame 10. The swing shaft 31 passes through one end of the shaft hole and exits from the other end. An adjusting handle 1 is installed on the extended section of the swing shaft 31. The extended end of the swing shaft 31 is secured to the adjusting handle 1 by an end cap 32 to prevent it from moving along the axial direction of the swing shaft 31. This design forms a lever structure with the swing shaft 31 as the fulcrum. The adjusting handle 1 can swing relative to the tractor frame 10 around the swing shaft 31. The front part of the adjusting handle 1 can drive the guide wheel to move in the left and right directions.

[0026] Specifically, the swing shaft 31 passes sequentially through the shaft hole and the vertical circular hole in the middle of the adjusting handle 1 from below the tractor frame 10; the end cover 32 is fixed above the swing shaft 31, and the adjusting handle 1 is installed on the tractor frame 10. The end cover 32 is fixedly connected to the end of the swing shaft 31 by several screws in a detachable manner. Of course, the end cover 32 can also be fixed in other ways, such as welding.

[0027] In this design, to ensure that the adjusting handle 1 can rotate relative to the tractor frame 10, a bearing 33 is fitted on the outer side of the swing shaft 31, which serves as a sliding layer between the swing shaft 31 and the adjusting handle 1. The bearing 33 is installed in the installation gap between the adjusting handle 1 and the swing shaft 31. The swing shaft 31 and the inner ring of the bearing 33 are fixedly connected, and the swing shaft 31 itself does not rotate. The adjusting handle 1 and the outer ring of the bearing 33 are fixedly connected. Therefore, the adjusting handle 1 can rotate relative to the tractor frame 10 around the swing shaft 31 as the center.

[0028] In this design, in order to ensure that the adjusting handle 1 does not experience direct relative wear during rotation relative to the tractor frame 10, a washer 34 is also provided on the swing shaft 31. The washer 34 is located between the adjusting handle 1 and the tractor frame 1 and is used to isolate the two, thereby avoiding mutual wear between the adjusting handle 1 and the tractor frame 1.

[0029] In this embodiment, two lever arms are respectively provided at both ends of the mounting hole that matches the adjustment handle 1 and the swing shaft 31. The guide wheel shaft assembly 2 is mounted on one lever arm of the adjustment handle 1. The position of the guide wheel shaft assembly 2 can be adjusted by levering the other lever arm of the adjustment handle 1, thereby achieving the adjustment of the position of the guide wheel shaft assembly 2 with relatively little effort.

[0030] In this scheme, after the adjustment handle 1 is installed on the swing shaft 31, the first lever arm 11 and the second lever arm 12 are located on both sides of the swing shaft 31, the guide wheel shaft assembly 2 is installed in the mounting hole at the end of the first lever arm 11, and the adjustment bolt group 4 is correspondingly installed in the threaded hole at the end of the second lever arm 11.

[0031] As shown in the figure, the adjusting handle 1 can adopt the following specific structure: The adjusting handle 1 includes a vertical circular hole in the middle, a first lever arm 11 and a second lever arm 12 located at both ends of the vertical circular hole, wherein the first lever arm 11 is a short lever arm and the second lever arm 12 is a long lever arm, and the length of the second lever arm 12 is greater than the length of the first lever arm 11. The adjusting bolt group 4 adjusts the position of the guide wheel shaft assembly 2 through lever action. Thus, during the position adjustment process of the adjusting handle 1, it can achieve the effect of saving effort. At the same time, during the position adjustment process, the guide wheel on the guide wheel shaft assembly 2 installed on the first lever arm 11 can be adjusted more precisely. Because the long lever arm adjusts the position by every bit through the adjusting bolt, the position adjustment amount formed on the guide wheel shaft assembly 2 on the short lever arm will be reduced by a factor of two. Therefore, during the manual adjustment process, not only is the effect of saving effort achieved, but also a higher precision adjustment of the relative position of the guide wheel and the track can be achieved.

[0032] In this design, the first lever arm 11 at the front of the adjusting handle 1 has a transverse circular hole for mounting the guide wheel shaft assembly 2. This transverse circular hole is perpendicular to the vertical circular hole on the tractor frame 10. It should be noted that the relative positions of the transverse and vertical circular holes are only shown in the diagram for ease of description; their relative positional relationship is that their central axes are perpendicular, and their positional changes during use are not limited. The second lever arm 12 at the rear of the adjusting handle 1 has at least two transverse threaded holes at its tail end for mounting the adjusting thread assembly 4. (The text repeats itself here.) Figure 2 As shown, the two transverse threaded holes and the lever fulcrum in the middle of the adjusting handle 1 are roughly arranged in a triangular position. With this arrangement, after the adjusting handle 1 is fixed from the left and right sides through the transverse threaded holes, the tail end of the adjusting handle 1 will be more stable and secure.

[0033] In this design, the guide wheel shaft assembly 2 is located at the front of the adjustment device, passes through the transverse circular hole at the front of the adjustment handle 1, and is connected to the tractor guide wheel hub seat at both ends by bolts.

[0034] In this design, the adjusting bolt assembly 4 is connected to the rear of the adjusting handle 1 and can be fixed to the tractor frame 10 (specifically, the limiting side plate 20 of the tractor frame 10). There are two limiting side plates 20, both of which are fixed to the tractor frame 10. The two limiting side plates 20 are located on both sides of the adjusting handle 1 and are arranged opposite to each other. The function of the adjusting bolt assembly 4 is to adjust the swing position of the rear of the adjusting handle 1, thereby driving the position of the guide wheel shaft assembly 2 at the front of the adjusting handle 1 to be adjusted.

[0035] In this embodiment, the adjusting bolt group 4 can adopt the following structure: The adjusting bolt group 4 includes a first adjusting bolt 41 and a second adjusting bolt 42, wherein the first adjusting bolt 41 and the second adjusting bolt 42 pass through the through holes on the two oppositely arranged limiting side plates 20 of the tractor frame 10, and then pass through the threaded hole corresponding to the tail of the adjusting handle 12. The threaded end of the adjusting bolt can abut against the side wall of the limiting side plate 20. The first adjusting bolt 41, which enters from the left, passes through the threaded hole of the left limiting side plate 20 and the tail of the adjusting handle 12 and abuts against the side wall of the right limiting side plate. The second adjusting bolt 42, which enters from the right, passes through the threaded hole of the right limiting side plate 20 and the tail of the adjusting handle 12 and abuts against the side wall of the left limiting side plate.

[0036] This solution also includes a locking assembly for locking the adjusting bolt. The locking assembly 5 includes a locking plate 51 and a fixing bolt 52. The locking plate has a locking hole that matches the shape of the bolt head of the adjusting bolt. For example, if the bolt head has a polygonal cross-section, the locking hole on the locking plate is also a polygonal hole that matches the bolt head. Specifically, the bolt heads of the first adjusting bolt 41 and the second adjusting bolt 42 are external hexagonal, while the locking hole of the locking plate 51 is an internal hexagonal hole. The purpose of their cooperation is to prevent the adjusting bolt from arbitrarily changing position when it is adjusted into place. The rotation causes the guide wheel hub to automatically shift position during use. After locking the locking plate 51, a fixing hole is provided at the other end of the locking plate 51. The fixing hole is used to fix the locking plate 51 to the limiting side plate 20 of the tractor frame 10 by passing through the fixing bolt 52. Since the polygonal hole of the locking plate 51 cooperates with the bolt head, and the fixing bolt 52 fixes one end of the locking plate 51, the locking plate 51 can effectively prevent the first and second adjusting bolts 41 and 42 from rotating arbitrarily, thus avoiding the guide wheel hub from shifting.

[0037] In this design, two adjusting bolts are used. The adjusting bolts pass through the limiting side plate 20 of the tractor frame 10 from the left and right sides respectively, and are screwed into the two transverse threaded holes at the rear of the adjusting handle 1 until the threaded end contacts the limiting side plate 20 of the tractor frame 10. A gap h is provided between the rear of the adjusting handle 1 and the inner wall of the tractor frame 10 (limiting side plate 20) to enable left and right movement. The locking piece 51 has a hole that matches the shape of the bolt head of the adjusting bolt, and is fixed to the outside of the tractor frame 10 by the fixing bolt 52.

[0038] The working principle of this scheme is as follows: When the guide wheel hub position needs to be adjusted to the right, remove the fixing bolts 52 and locking plates 51 on both sides, loosen the right-side adjusting bolt, and then tighten the left-side adjusting bolt. Since the threaded end of the left-side adjusting bolt is already in contact with the limiting side plate 20 of the tractor frame 10, the bolt cannot move further to the right. However, there is a gap between the rear part of the adjusting handle 1 and the inner walls of the limiting side plate 20. Therefore, when the left-side adjusting bolt is tightened, the rear part of the adjusting handle 1 follows the thread rotation and swings to the left, while simultaneously driving the front part of the adjusting handle 1 to swing to the right, i.e., the guide wheel position is adjusted to the right. When the guide wheel reaches the appropriate position, tighten the right-side adjusting bolt. The combined force of the two adjusting bolts positions the adjusting handle 1. Then, install the locking plates 51 and fixing bolts 52 to prevent the adjusting bolts from loosening, thus completing the locking of the adjusting device.

[0039] When the guide wheel hub position needs to be adjusted to the left, remove the fixing bolts 52 and locking plates 51 on both sides, loosen the left adjusting bolt, and then tighten the right adjusting bolt. When the guide wheel reaches the appropriate position, tighten the left adjusting bolt again to position the adjusting handle 1, and then install the locking plate 51 and fixing bolts 52 to prevent the adjusting bolts from loosening, thus completing the locking of the adjusting device.

[0040] The adjustment device in this solution adopts a lever-type structure. One end is connected to the tractor's guide wheel, and the other end is a two-way bolt adjustment and locking mechanism. Only two bolts are needed to achieve stepless adjustment and locking of the clearance between the guide wheel and the track. In use, the guide wheel hub position can be adjusted manually by adjusting one side of the bolt, and locked by the bolt on the other side. This adjusts the clearance between the tractor's guide wheel and the track, resulting in more even wear on both, improving overall machine efficiency and extending the service life of the walking system. The device has a simple structure, low cost, and is easy to manufacture and promote.

[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A guide wheel adjustment device for a tracked tractor, comprising a tractor frame and a guide wheel axle assembly, wherein both ends of the guide wheel axle assembly are respectively used to mount guide wheel hubs; characterized in that: The guide wheel adjustment device further includes a swing shaft assembly and an adjusting bolt group. The swing shaft assembly includes a swing shaft and an adjusting handle mounted on the swing shaft. The adjusting handle is rotatably mounted on the tractor frame via the swing shaft. The first end of the adjusting handle is used to mount the guide wheel shaft assembly, and the second end of the adjusting handle can swing and adjust, thereby driving the guide wheel shaft assembly at the first end of the adjusting handle to adjust its position around the swing shaft. The adjusting bolt group is mounted on the second end of the adjusting handle and is used to swing and adjust the second end of the adjusting handle.

2. The guide wheel adjustment device for a tracked tractor according to claim 1, characterized in that: The tractor frame is provided with a shaft hole, and the swing shaft passes through the shaft hole and the mounting hole of the adjustment handle in sequence and is fixed to the end cover, so that the adjustment handle can be rotatably mounted on the tractor frame, thereby restricting the adjustment handle to only be able to rotate around the swing shaft.

3. The guide wheel adjustment device for a tracked tractor according to claim 1, characterized in that: The adjusting bolt group has at least one adjusting bolt on each side of the second end of the adjusting handle. The adjusting bolt passes through the corresponding screw hole of the adjusting handle from both sides. After passing through the corresponding screw hole, the adjusting bolt can abut against the corresponding limit side plate of the tractor frame.

4. The guide wheel adjustment device for a tracked tractor according to claim 3, characterized in that: The guide wheel adjustment device also includes a locking assembly. After the guide wheel shaft assembly is adjusted to the correct position, the locking assembly is used to lock and fix the adjusting bolt.

5. The guide wheel adjustment device for a tracked tractor according to claim 4, characterized in that: The locking assembly includes at least one locking plate, which has a locking hole that matches the shape of the bolt head of the adjusting bolt. After the locking hole is fitted onto the corresponding bolt head, the locking plate is fixed to the corresponding limiting side plate by a fastening bolt.

6. The guide wheel adjustment device for a tracked tractor according to claim 1, characterized in that: The central axis of the swing shaft is perpendicular to the central axis of the guide wheel shaft assembly.

7. The guide wheel adjustment device for a tracked tractor according to claim 1, characterized in that: The adjustment handle is rotatably mounted on the swing shaft via a bearing.

8. The guide wheel adjustment device for a tracked tractor according to claim 1, characterized in that: The swing shaft between the adjusting handle and the tractor frame is externally fitted with a washer to separate the two.

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