Front drive axle with automatic adjustment of track

Abstract

The utility model provides a kind of front drive axle of automatic adjustment wheel distance, including central transmission assembly, the both sides of central transmission assembly are equipped with wheel edge assembly, the input shaft of wheel edge assembly is connected with the output shaft of central transmission assembly by telescopic shaft sleeve mechanism transmission coupling;The shell both sides of central transmission assembly are fixed with adjusting oil cylinder, adjusting oil cylinder is parallel with telescopic shaft sleeve mechanism, the telescopic end of adjusting oil cylinder is connected with the fixed end shell of wheel edge assembly;The fixed end shell of wheel edge assembly is also connected with the shell of central transmission assembly by locking component.Adopting the utility model, by adjusting oil cylinder drive wheel edge assembly close or far from central transmission assembly, telescopic shaft sleeve mechanism can adapt the distance change of both, realize the automatic adjustment of wheel distance, without affecting the transmission of central transmission assembly to wheel edge assembly;Wheel distance can be adjusted according to the different ridge distance change of different crops.

Description

Technical Field

[0001] This utility model relates to the field of tractor front drive axle technology, specifically to a front drive axle with automatic wheel track adjustment. Background Technology

[0002] When tractors are used for planting different crops, the spacing between rows needs to be adjusted to accommodate varying row spacing. Currently, the track width of the front drive axle of tractors is not adjustable, making it impossible to adjust the track width according to the different row spacing requirements of various crops. If the track width and row spacing of the tractor do not match, it will lead to reduced work efficiency, increased difficulty for the driver, and additional wear and tear on the implements. Furthermore, a mismatched track width can cause seedling damage, root damage, incorrect row spacing during sowing, and wasted harvest. Utility Model Content

[0003] To solve at least one of the above technical problems, this utility model provides a front drive axle with automatic wheel track adjustment.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides an automatically adjustable front drive axle, including a central drive assembly. Wheel assemblies are provided on both sides of the central drive assembly. The input shaft of the wheel assemblies is connected to the output shaft of the central drive assembly via a telescopic bushing mechanism. Adjusting cylinders are fixed on both sides of the housing of the central drive assembly. The adjusting cylinders are parallel to the telescopic bushing mechanism, and the telescopic ends of the adjusting cylinders are connected to the fixed end housing of the wheel assemblies. The fixed end housing of the wheel assemblies is also connected to the housing of the central drive assembly via a locking component.

[0005] The beneficial effects of this utility model are: By employing this utility model, the wheel-side assembly can be driven closer to or further away from the central transmission assembly by adjusting the hydraulic cylinder. At the same time, the telescopic bushing mechanism can adapt to changes in the distance between the wheel-side assembly and the central transmission assembly, realizing automatic adjustment of the wheel gauge. This is convenient to operate and does not affect the transmission from the central transmission assembly to the wheel-side assembly. Therefore, the wheel gauge can be adjusted according to the different row spacing of different crops, ensuring that the wheel gauge matches the row spacing. This results in high operating efficiency, low operating difficulty and minimal wear on machinery, and avoids crushing seedlings, damaging roots, and wasting fruit.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the locking component is a locking plate, which has multiple sets of bolt holes along its length. At least one set of bolt holes is bolted to the fixed end housing of the wheel assembly, and the remaining at least one set of bolt holes is bolted to the housing of the central transmission assembly.

[0008] With multiple sets of bolt holes, the locking plate can select two appropriate sets of bolt holes according to the distance between the wheel rim assembly and the central drive assembly for connection with the wheel rim assembly and the central drive assembly, thus adapting to changes in wheel track and providing good stability.

[0009] Furthermore, one end of the locking plate is provided with a set of first bolt holes, which are bolted to the fixed end housing of the wheel assembly; multiple sets of second bolt holes are distributed from the middle to the other end of the locking plate, and at least one set of second bolt holes is bolted to the housing of the central transmission assembly.

[0010] When adjusting the wheel track, simply select a suitable set of second bolt holes according to the wheel track and connect them to the housing of the central drive assembly. There is no need to remove the bolts in the first bolt holes, making disassembly and assembly convenient.

[0011] Furthermore, there are two second bolt holes in the same group, and the distribution direction of the two second bolt holes forms an angle with the length direction of the locking plate.

[0012] This helps to reduce the weakening effect of the second bolt holes in the same group on the locking plate and improve the strength of the locking plate.

[0013] Furthermore, a steering cylinder is also fixed on the housing of the central transmission assembly, and the telescopic end of the steering cylinder is connected to the steering end housing of the wheel-side assembly through an adjustable linkage mechanism.

[0014] The adjustable linkage mechanism transmits the movement of the steering cylinder to the steering end housing of the wheel-side assembly, which is convenient to adapt to changes in the distance between the wheel-side assembly and the central drive assembly and is easy to adjust.

[0015] Furthermore, the adjustable linkage mechanism includes a linkage body and an adjusting rod. One end of the adjusting rod is hinged to the telescopic end of the steering cylinder via a ball joint. The other end of the adjusting rod is rotatably fitted with an adjusting block. The end of the adjusting block near the linkage body has an external thread section that extends into the linkage body and is threadedly connected to the linkage body. The end of the linkage body away from the adjusting block is hinged to the steering end housing of the wheel assembly.

[0016] When adjusting the wheel track, the length of the external thread section screwed into the connecting rod body can be adjusted by turning the adjusting block to adapt to changes in the distance between the wheel assembly and the central transmission assembly, making adjustment convenient. One end of the adjusting rod is hinged to the ball joint of the housing of the central transmission assembly, and the end of the connecting rod body away from the adjusting block is hinged to the steering end housing of the wheel assembly. This allows the extension and retraction motion of the steering cylinder to be transmitted to the steering end housing of the wheel assembly, avoiding structural interference. Furthermore, the ball joint can adapt to angle changes in all directions, reducing the resistance to the movement of the adjustable linkage mechanism.

[0017] Furthermore, the side of the adjusting rod has multiple threaded holes distributed along its length, and the adjusting block is connected to the threaded holes of the adjusting rod by bolts.

[0018] By selecting the appropriate threaded hole on the adjusting block and adjusting rod for connection, it is easy to adjust the overall length of the connecting rod body and the adjusting rod, thereby adapting to the changes in distance between the wheel-side assembly and the central transmission assembly, making adjustment convenient.

[0019] Furthermore, the telescopic bushing mechanism includes a wheel-side drive shaft and a central spline sleeve, which are connected by a spline drive. The wheel-side drive shaft is coaxially and fixedly connected to the input shaft of the wheel-side assembly, and the central spline sleeve is coaxially and fixedly connected to the output shaft of the central drive assembly.

[0020] The splines of the wheel-side drive shaft and the central spline sleeve are slidable, which makes it easy to adapt to changes in the distance between the wheel-side assembly and the central drive assembly without affecting the transmission.

[0021] Furthermore, the telescopic bushing mechanism also includes a first guide sleeve and a second guide sleeve. One end of the first guide sleeve is fixedly connected to the fixed end housing of the wheel-side assembly, and the other end of the first guide sleeve extends into one end of the second guide sleeve. The other end of the second guide sleeve is fixedly connected to the housing of the central transmission assembly.

[0022] The first guide sleeve and the second guide sleeve surround the wheel-side drive shaft and the central spline sleeve, which helps to protect the wheel-side drive shaft and the central spline sleeve from corrosion by external media such as water, and improves the transmission reliability of the wheel-side drive shaft and the central spline sleeve.

[0023] Furthermore, both the first guide sleeve and the second guide sleeve are coaxially arranged with the wheel-side drive shaft, and the first guide sleeve and the second guide sleeve are slidably connected.

[0024] Easy to install, and the sliding connection can improve the sealing of the first guide sleeve and the second guide sleeve, preventing external corrosive media from entering the first guide sleeve and the second guide sleeve. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 for Figure 1 The front view.

[0027] Figure 3 for Figure 2 Top view.

[0028] Figure 4 This is a schematic diagram of the telescopic bushing mechanism.

[0029] In the accompanying drawings, the technical features represented by each reference numeral are as follows: 1-Central drive assembly; 2-Wheel-side assembly; 3-Telescopic bushing mechanism; 4-Adjusting cylinder; 5-Locking plate; 6-Connecting rod body; 7-Adjusting block; 8-Adjusting rod; 9-Steering cylinder; 10-Wheel-side drive shaft; 11-Central spline sleeve; 12-First guide sleeve; 13-Second guide sleeve. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0031] This utility model refers to Figure 1-4 .

[0032] This utility model provides an automatically adjustable front drive axle, including a central drive assembly 1, with wheel assemblies 2 on both sides of the central drive assembly 1. The input shaft of the wheel assemblies 2 is connected to the output shaft of the central drive assembly 1 via a telescopic bushing mechanism 3. Adjusting cylinders 4 are fixed on both sides of the housing of the central drive assembly 1. The adjusting cylinders 4 are parallel to the telescopic bushing mechanism 3, and the telescopic end of the adjusting cylinders 4 is connected to the fixed end housing of the wheel assemblies 2. The fixed end housing of the wheel assemblies 2 is also connected to the housing of the central drive assembly 1 via a locking component.

[0033] principle: Both the central drive assembly 1 and the wheel-side assembly 2 are existing structures on the tractor and belong to the prior art. The wheel-side assembly 2 has a fixed end and a steering end. A universal joint drive shaft is provided between the fixed end and the steering end for transmission and to accommodate the steering end relative to the fixed end. The steering end is provided with an output flange for mounting tires.

[0034] During installation, the input shaft of the central drive assembly 1 is connected to the power output shaft of the transfer case. The power of the transfer case comes from the engine of the agricultural machinery. The tires are fixed to the wheel assembly 2 with bolts. During operation, the two output shafts of the central drive assembly 1 transmit power to the wheel assembly 2 through the telescopic bushing mechanism 3, and the wheel assembly 2 drives the tires to move.

[0035] When adjusting the wheel track, remove the locking component, then control the extension or retraction of the adjusting cylinder 4 to drive the wheel-side assembly 2 closer to or further away from the central transmission assembly 1. The telescopic bushing mechanism 3 extends or retracts to adapt to changes in the distance between the wheel-side assembly 2 and the central transmission assembly 1. The wheel-side assembly 2 drives the tire to adjust the wheel track. After selecting the wheel track, fix the fixed end housing of the wheel-side assembly 2 and the housing of the central transmission assembly 1 to the locking component to fix the wheel track for stable operation. Depending on the needs, the tractor's front wheels can be jacked up or left unjacked when adjusting the wheel track.

[0036] By adjusting the hydraulic cylinder 4, the wheel-side assembly 2 can be driven closer to or further away from the central transmission assembly 1. At the same time, the telescopic bushing mechanism 3 can adapt to changes in the distance between the wheel-side assembly 2 and the central transmission assembly 1, thus realizing automatic adjustment of the wheel gauge. This is convenient to operate and does not affect the transmission from the central transmission assembly 1 to the wheel-side assembly 2. Therefore, the wheel gauge can be adjusted according to the different ridge spacing of different crops, ensuring that the wheel gauge matches the ridge spacing. This results in high operating efficiency, low operating difficulty and low wear on machinery, and avoids crushing seedlings, damaging roots and wasting fruit.

[0037] Furthermore, the locking component is a locking plate 5, which has multiple sets of bolt holes along its length. At least one set of bolt holes is bolted to the fixed end housing of the wheel assembly 2, and the remaining at least one set of bolt holes is bolted to the housing of the central transmission assembly 1.

[0038] Note: A set of bolt holes may consist of one or more bolt holes.

[0039] With multiple sets of bolt holes, the locking plate 5 can select two appropriate sets of bolt holes according to the distance between the wheel rim assembly 2 and the central transmission assembly 1, for connection with the wheel rim assembly 2 and the central transmission assembly 1, thereby adapting to changes in wheel track and providing good stability.

[0040] Furthermore, one end of the locking plate 5 is provided with a set of first bolt holes, which are bolted to the fixed end housing of the wheel assembly 2; multiple sets of second bolt holes are distributed from the middle to the other end of the locking plate 5, and at least one set of second bolt holes is bolted to the housing of the central transmission assembly 1.

[0041] Preferably, there are three first bolt holes and two second bolt holes. In addition, two sets of second bolt holes are bolted to the housing of the central drive assembly 1.

[0042] When adjusting the wheel track, simply select a suitable set of second bolt holes according to the wheel track and connect them to the housing of the central transmission assembly 1. There is no need to disassemble or install the bolts in the first bolt holes, making disassembly and assembly convenient.

[0043] Furthermore, there are two second bolt holes in the same group, and the distribution direction of the two second bolt holes forms an angle with the length direction of the locking plate 5.

[0044] This helps to reduce the weakening effect of the second bolt holes in the same group on the locking plate 5 and improve the strength of the locking plate 5.

[0045] Furthermore, a steering cylinder 9 is also fixed on the housing of the central transmission assembly 1, and the telescopic end of the steering cylinder 9 is connected to the steering end housing of the wheel-side assembly 2 through an adjustable linkage mechanism.

[0046] Note: Steering cylinder 9 is an existing structure on the tractor. Steering cylinder 9 drives the steering end housing of wheel-side assembly 2 to perform steering actions by extending and retracting, which is existing technology.

[0047] The adjustable linkage mechanism transmits the movement of the steering cylinder 9 to the steering end housing of the wheel-side assembly 2, which is convenient to adapt to changes in the distance between the wheel-side assembly 2 and the central transmission assembly 1, and is easy to adjust.

[0048] Furthermore, the adjustable linkage mechanism includes a linkage body 6 and an adjusting rod 8. One end of the adjusting rod 8 is hinged to the telescopic end of the steering cylinder 9 via a ball joint. The other end of the adjusting rod 8 is rotatably fitted with an adjusting block 7. The end of the adjusting block 7 near the linkage body 6 is provided with an external thread section, which extends into the linkage body 6 and is threadedly connected to the linkage body 6. The end of the linkage body 6 away from the adjusting block 7 is hinged to the steering end housing of the wheel assembly 2.

[0049] Note: One end of the adjusting rod 8 is connected to the telescopic end of the steering cylinder 9 by a ball joint hinge, that is, the telescopic end of the steering cylinder 9 is fixed with a ball joint hinge seat, and one end of the adjusting rod 8 is provided with a hinge ball joint, which extends into the ball joint hinge seat.

[0050] When adjusting the wheel track, the length of the external thread section of the connecting rod body 6 can be adjusted by turning the adjusting block 7 to adapt to the changes in the distance between the wheel assembly 2 and the central transmission assembly 1, making adjustment convenient. One end of the adjusting rod 8 is hinged to the ball joint of the housing of the central transmission assembly 1, and the end of the connecting rod body 6 away from the adjusting block 7 is hinged to the steering end housing of the wheel assembly 2, so that the extension and retraction movement of the steering cylinder 9 can be transmitted to the steering end housing of the wheel assembly 2, avoiding structural interference. Moreover, the ball joint can adapt to angle changes in various directions, reducing the resistance of the adjustable linkage mechanism.

[0051] Furthermore, the side of the adjusting rod 8 has multiple threaded holes distributed along its length, and the adjusting block 7 is connected to the threaded holes of the adjusting rod 8 by bolts.

[0052] Note: The side of the adjusting block 7 has a through hole, and the bolt passes through the through hole of the adjusting block 7 and connects to the threaded hole of the adjusting rod 8.

[0053] By selecting the appropriate threaded hole on the adjusting block 7 and the adjusting rod 8, it is easy to adjust the overall length of the connecting rod body 6 and the adjusting rod 8, thereby adapting to the change in distance between the wheel-side assembly 2 and the central transmission assembly 1, making adjustment convenient.

[0054] Furthermore, the telescopic bushing mechanism 3 includes a wheel-side drive shaft 10 and a central spline sleeve 11, which are connected by a spline drive. The wheel-side drive shaft 10 is coaxially and fixedly connected to the input shaft of the wheel-side assembly 2, and the central spline sleeve 11 is coaxially and fixedly connected to the output shaft of the central drive assembly 1.

[0055] Note: The wheel-side drive shaft 10 and the input shaft of the wheel-side assembly 2 can be the same shaft.

[0056] The splines of the wheel-side drive shaft 10 and the central spline sleeve 11 are slidable, which makes it easy to adapt to changes in the distance between the wheel-side assembly 2 and the central drive assembly 1 without affecting the transmission.

[0057] Furthermore, the telescopic bushing mechanism 3 also includes a first guide sleeve 12 and a second guide sleeve 13. One end of the first guide sleeve 12 is fixedly connected to the fixed end housing of the wheel rim assembly 2, and the other end of the first guide sleeve 12 extends into one end of the second guide sleeve 13. The other end of the second guide sleeve 13 is fixedly connected to the housing of the central transmission assembly 1.

[0058] The first guide sleeve 12 and the second guide sleeve 13 enclose the wheel-side drive shaft 10 and the central spline sleeve 11, which helps to protect the wheel-side drive shaft 10 and the central spline sleeve 11 from external water and other media corrosion, thereby improving the transmission reliability of the wheel-side drive shaft 10 and the central spline sleeve 11.

[0059] Furthermore, the first guide sleeve 12 and the second guide sleeve 13 are both arranged coaxially with the wheel-side drive shaft 10, and the first guide sleeve 12 and the second guide sleeve 13 are slidably connected.

[0060] Easy to install, and the sliding connection can improve the sealing of the first guide sleeve 12 and the second guide sleeve 13, preventing external corrosive media from entering the first guide sleeve 12 and the second guide sleeve 13.

[0061] In the description of this utility model, it should be understood that if descriptive terms indicating orientation, direction, or positional relationship appear, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of understanding this utility model and simplifying the description, and does not indicate or imply that the part, element, or whole referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0062] Furthermore, if sequential descriptive terms such as "first," "second," etc., appear, their purpose in this specification is for ease of understanding or simplification. For example, to distinguish multiple technical features of the same type or function, which must be mentioned separately, this specification may use prefixes or suffixes to differentiate them. Therefore, they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first," "second," etc., may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this utility model, if descriptive terms describing structural relationships are used, such as "installation," "connection," "joining," and "fixing," they should be interpreted broadly unless otherwise explicitly specified and limited. For example, "installation," "connection," and "joining" can refer to a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. "Fixing" can refer to an integral fixation or a detachable fixation using fasteners; it can be a direct fixation or a fixation through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood based on the specific circumstances, the context, and the coherence of the preceding and following text.

[0064] In this utility model, if descriptive terms containing subordinate or connecting meanings appear, such as "above" or "below" the second feature, they should not be interpreted restrictively unless otherwise explicitly specified and limited. For example, "above" or "below" can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For those skilled in the art, the specific meaning of the above descriptive terms in this utility model can be understood according to the specific circumstances, the context, and the coherence of the preceding and following text.

[0065] Furthermore, "above," "on top of," and "above" the first feature in relation to the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments, examples, and features described in this specification, and such combinations or integrations should all fall within the scope of the present invention.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Variations, modifications, substitutions, and modifications made by those skilled in the art to the above embodiments within the scope of information available through public channels and in conjunction with the technical teachings given in this application are still covered within the protection scope of this application.

Claims

1. A front drive axle with automatic wheelbase adjustment, characterized in that: The assembly includes a central drive assembly (1), and wheel assemblies (2) are provided on both sides of the central drive assembly (1). The input shaft of the wheel assemblies (2) is connected to the output shaft of the central drive assembly (1) through a telescopic bushing mechanism (3). Adjusting cylinders (4) are fixed on both sides of the housing of the central drive assembly (1). The adjusting cylinders (4) are parallel to the telescopic bushing mechanism (3). The telescopic end of the adjusting cylinders (4) is connected to the fixed end housing of the wheel assemblies (2). The fixed end housing of the wheel assemblies (2) is also connected to the housing of the central drive assembly (1) through a locking component.

2. The front drive axle with automatic wheelbase adjustment according to claim 1, characterized in that: The locking component is a locking plate (5). Multiple sets of bolt holes are provided on the locking plate (5) along its own length direction. At least one set of bolt holes is connected to the fixed end housing of the wheel assembly (2) by bolts, and the remaining at least one set of bolt holes is connected to the housing of the central transmission assembly (1) by bolts.

3. The front drive axle with automatic wheelbase adjustment according to claim 2, characterized in that: One end of the locking plate (5) is provided with a set of first bolt holes, which are connected to the fixed end housing of the wheel assembly (2) by bolts; multiple sets of second bolt holes are distributed from the middle to the other end of the locking plate (5), and at least one set of second bolt holes is connected to the housing of the central transmission assembly (1) by bolts.

4. The front drive axle with automatic wheelbase adjustment according to claim 3, characterized in that: There are two second bolt holes in the same group, and the distribution direction of the two second bolt holes forms an angle with the length direction of the locking plate (5).

5. The front drive axle with automatic wheelbase adjustment according to claim 1, characterized in that: A steering cylinder (9) is also fixed on the housing of the central transmission assembly (1). The telescopic end of the steering cylinder (9) is connected to the steering end housing of the wheel-side assembly (2) through an adjustable linkage mechanism.

6. The front drive axle with automatic wheelbase adjustment according to claim 5, characterized in that: The adjustable linkage mechanism includes a linkage body (6) and an adjusting rod (8). One end of the adjusting rod (8) is hinged to the telescopic end of the steering cylinder (9) via a ball joint. The other end of the adjusting rod (8) is rotatably fitted with an adjusting block (7). The end of the adjusting block (7) near the linkage body (6) is provided with an external thread section, which extends into the linkage body (6) and is threadedly connected to the linkage body (6). The end of the linkage body (6) away from the adjusting block (7) is hinged to the steering end housing of the wheel assembly (2).

7. The front drive axle with automatic wheelbase adjustment according to claim 6, characterized in that: The side of the adjusting rod (8) has multiple threaded holes distributed along its length, and the adjusting block (7) is connected to the threaded holes of the adjusting rod (8) by bolts.

8. The front drive axle with automatic wheelbase adjustment according to claim 1, characterized in that: The telescopic bushing mechanism (3) includes a wheel-side drive shaft (10) and a central spline sleeve (11). The wheel-side drive shaft (10) and the central spline sleeve (11) are connected by spline transmission. The wheel-side drive shaft (10) is coaxially and fixedly connected to the input shaft of the wheel-side assembly (2), and the central spline sleeve (11) is coaxially and fixedly connected to the output shaft of the central transmission assembly (1).

9. The front drive axle with automatic wheelbase adjustment according to claim 8, characterized in that: The telescopic bushing mechanism (3) also includes a first guide sleeve (12) and a second guide sleeve (13). One end of the first guide sleeve (12) is fixedly connected to the fixed end housing of the wheel rim assembly (2), and the other end of the first guide sleeve (12) extends into one end of the second guide sleeve (13). The other end of the second guide sleeve (13) is fixedly connected to the housing of the central transmission assembly (1).

10. The front drive axle with automatic wheelbase adjustment according to claim 9, characterized in that: The first guide sleeve (12) and the second guide sleeve (13) are both arranged coaxially with the wheel-side drive shaft (10), and the first guide sleeve (12) and the second guide sleeve (13) are slidably connected.

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