Tractor power chassis device

Abstract

The utility model provides a tractor power chassis device, and belongs to the technical field of tractor chassis. Comprising a chassis, a plurality of crawler belt movement mechanisms and a plurality of tire movement mechanisms, the two opposite sides of the chassis are each provided with two driving shafts, and the crawler belt movement mechanisms or the tire movement mechanisms can be installed on the driving shafts; the tire movement mechanism comprises a driving gear in transmission connection with the driving shaft, and a supporting frame rotationally connected with the driving shaft in a sleeving mode is further fixed to the chassis. Through the arrangement of the replaceable crawler belt movement mechanism and the tire movement mechanism, the tractor can work through the crawler belt movement mechanism when working on the ground with the severe environment, the application environment of the tractor is increased, and when the tractor works in the conventional environment or needs to be transferred to another environment to work, the tractor can work in the normal environment. The tire-replaceable movement mechanism improves the overall maneuverability of the tractor, guarantees the working timeliness of the tractor, and reduces the cultivation operation cost.

Description

Technical Field

[0001] This utility model relates to the field of tractor chassis technology, and in particular to a tractor power chassis device. Background Technology

[0002] In recent years, with the development of economy and technology, all kinds of tractors have been widely used in agricultural cultivation and transportation. Among them, wheeled tractors have been accepted by the vast rural areas due to their advantages such as high speed. However, when wheeled tractors are used for cultivating paddy fields, they often get stuck in the mud and cannot get out. At this time, they can only be rescued by other mechanical equipment, exposing their poor passability disadvantage. To address this, Chinese Patent No. CN211809924U discloses a tracked tractor that uses tracks for walking and has a self-rescue device at the front. When the tracks get stuck in the mud, the self-rescue device extends and holds against the ground, pushing the entire vehicle out of the mud. This allows the tractor to still have good passability even on harsh road surfaces. Although the above-mentioned tractor has achieved adaptation to harsh environments, the tracked mobility is poor when working on conventional ground. If the tractor chassis can only move through the tracks, it is obviously not conducive to high-mobility work in conventional working environments. Therefore, it may be necessary to purchase a wheeled tractor, which will easily increase operating costs. Therefore, this application provides a tractor power chassis device to meet the needs. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a tractor power chassis device to solve the problem that existing tractors, which can only move by tracks, have poor mobility when changing working environments, require towing, and easily increase the operating cost of tractors.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A tractor power chassis device includes a chassis, multiple track movement mechanisms, and multiple tire movement mechanisms. Two drive shafts are provided on opposite sides of the chassis, and either the track movement mechanism or the tire movement mechanism can be mounted on the drive shafts. Each track movement mechanism includes a drive gear that is hygienically connected to the drive shaft. A support frame that is rotatably sleeved with the drive shaft is fixed on the chassis. A connecting rod is fixed to the bottom of the support frame. A support roller and multiple guide rollers are rotatably connected to the bottom of the connecting rod. The support roller is located on the same side of the guide rollers. An adjusting bracket is also mounted on the connecting rod, and a tensioning roller is rotatably connected to the adjusting bracket. The drive gear, support roller, tensioning roller, and multiple guide rollers are all fitted with the same track. A plurality of internal driven teeth that mesh with the drive gear are evenly arranged on the inner ring of the track. A relief groove is provided in the middle of each support roller, guide roller, and tensioning roller, allowing the internal driven teeth to pass through the relief groove.

[0006] Preferably, the connecting rod is further equipped with a first adjusting member for adjusting the position of the adjusting bracket and thus achieving track tensioning through the tensioning wheel, and a second adjusting member for adjusting or limiting the position of the first adjusting member.

[0007] Preferably, threaded sleeves and support sleeves are installed on opposite sides of the connecting rod perpendicular to the tension wheel axis; two sliding rods are installed on the side of the adjusting bracket near the support sleeve, the sliding rods are slidably sleeved with the support sleeves, and the sliding rods are longer than the support sleeves; the first adjusting component includes an adjusting bolt threadedly connected to the threaded sleeve, one end of the adjusting bolt abutting against the end of the sliding rod away from the adjusting bracket, and the nut of the adjusting bolt is polygonal.

[0008] Preferably, the diameter of the adjusting bolt is larger than the diameter of the slide rod.

[0009] Preferably, the number of sides of the nut is even, and an adjustment hole penetrating the nut is provided on each of the two opposite sides of the nut;

[0010] Preferably, the second adjusting member includes an adjusting rod that is inserted into the adjusting hole, and one end of the adjusting rod is fitted with a handle perpendicular to the axis of the adjusting rod;

[0011] Preferably, one side of the connecting rod has multiple positioning holes that pass through the connecting rod. The multiple positioning holes are evenly arranged along the axis of the adjusting bolt. When the chassis uses a tracked motion mechanism, the adjusting rod passes through any one of the positioning holes and any one of the adjusting holes on the two nuts at the same time.

[0012] Preferably, the adjusting rod has a limiting hole, and a limiting pin is detachably connected to the limiting hole. The limiting pin and the handle are located on opposite sides of the two nuts.

[0013] Preferably, a limiting ring is provided at the junction of the nut and the adjusting bolt, and a slot is provided on the side of the handle near the adjusting rod, the width of which is adapted to the thickness of the limiting ring.

[0014] Preferably, the end of the adjusting rod away from the handle has a tapered portion.

[0015] Preferably, when the handle is engaged with the limiting ring via the slot, the axis of the handle is parallel to the axis of the adjusting bolt, and one end of the handle extends beyond the nut.

[0016] Compared with the prior art, this utility model has at least the following beneficial effects:

[0017] In the above solution, by setting up replaceable track movement mechanism and tire movement mechanism, the tractor can work through the track movement mechanism when working on harsh ground, increasing the tractor's applicable environment. When the tractor is working in a normal environment or needs to be transferred to another environment, the replaceable tire movement mechanism can improve the tractor's overall mobility, ensure the timeliness of the tractor's work, and reduce the cost of farming operations.

[0018] By setting the first adjustment component, when the track tension needs to be adjusted, the adjusting nut is turned by turning a wrench that matches the number and size of the nut, which in turn causes the adjusting bolt to push the sliding rod. This, in turn, drives the tensioning wheel through the adjusting bracket to adjust the track tension. When the track needs to be replaced, the adjusting nut can be turned in the opposite direction, causing the sliding rod to lose the support of the adjusting bolt. This causes the track to press the tensioning wheel under its own weight, moving the tensioning wheel closer to the support sleeve, thereby loosening the track and facilitating the removal and installation of the track.

[0019] After adjusting the adjusting bolts using the adjusting rod, the adjusting rod can be passed through the coaxial positioning hole and the two adjusting holes to prevent the adjusting bolts from rotating due to vibration during daily use, thereby ensuring the tensioning effect of the tensioning wheel on the track. Furthermore, the adjusting rod can only pass through the predetermined positioning hole and adjusting hole at predetermined positions, ensuring the consistency of the positions of the two adjusting bolts after adjustment, ensuring the uniformity of force on the adjusting bracket and the tensioning wheel, and improving the service life of the adjusting bracket and the tensioning wheel. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0021] Figure 1 A three-dimensional structural diagram of a tracked motion mechanism installed on a tractor power chassis;

[0022] Figure 2 A three-dimensional structural diagram of a tire-mounting mechanism for a tractor power chassis;

[0023] Figure 3 This is a three-dimensional structural diagram of the tracked motion mechanism;

[0024] Figure 4 A three-dimensional structural diagram of the connecting rod and adjusting components;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the connecting rod;

[0026] Figure 6 A schematic diagram of the three-dimensional structure of the adjustment component;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the adjusting rod.

[0028] [Figure Labels]

[0029] 1. Chassis; 2. Tracked motion mechanism; 3. Tire motion mechanism; 4. Drive gear; 5. Track; 6. Internal driven gear; 7. Support frame; 8. Connecting rod; 9. Track roller; 10. Idler wheel; 11. Adjusting bracket; 12. Tensioner wheel; 13. Threaded sleeve; 14. Support sleeve; 15. Slide rod; 16. Positioning hole; 17. Adjusting bolt; 18. Nut; 19. Adjusting hole; 20. Adjusting rod; 21. Handle; 22. Limiting hole; 23. Limiting pin; 24. Tapered part; 25. Limiting ring; 26. Slot.

[0030] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to the specific structure, device and environment. According to specific needs, those skilled in the art can adjust or modify these devices and environments, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0031] The present invention provides a tractor power chassis device in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; for some known technologies, those skilled in the art can also use other alternative methods to implement the invention; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0032] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0033] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0034] It is understood that the meanings of “on”, “above” and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0035] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0036] like Figure 1 and Figure 2 As shown, an embodiment of this utility model provides a tractor power chassis device, including a chassis 1, multiple track movement mechanisms 2 and multiple tire movement mechanisms 3. Two drive shafts are provided on opposite sides of the chassis 1. The track movement mechanism 2 or the tire movement mechanism 3 can be installed on the drive shaft. The tire movement mechanism 3 is the prior art. It can be connected to the drive shaft through the wheel rim, and the tire is installed on the wheel rim and driven by the drive shaft.

[0037] like Figures 1-3 As shown, in this embodiment, the track movement mechanism 2 includes a drive gear 4 that is connected to the drive shaft. A support frame 7, rotatably connected to the drive shaft, is also fixed on the chassis 1. A connecting rod 8 is fixed to the bottom of the support frame 7. A support roller 9 and multiple guide rollers 10 are rotatably connected to the bottom of the connecting rod 8. The support roller 9 is located on the same side of the multiple guide rollers 10. An adjusting bracket 11 is also installed on the connecting rod 8. A tensioning wheel 12 is rotatably connected to the adjusting bracket 11. The drive gear 4, support roller 9, tensioning wheel 12, and multiple guide rollers 10 are all fitted with the same track 5. The inner ring of the track 5 is evenly provided with a number of internal driven teeth 6 that mesh with the drive gear 4. The middle of the support roller 9, the guide roller 10, and the tension roller 12 are all provided with relief grooves. The internal driven teeth 6 can pass through the relief grooves. The advantage of this arrangement is that it avoids interference between the internal driven teeth 6 and the support roller 9, the guide roller 10, and the tension roller 12, ensuring the normal use of this device. The connecting rod 8 is also equipped with a first adjusting member for adjusting the position of the adjusting bracket 11 and thus achieving the tension of the track 5 through the tension roller 12, and a second adjusting member for adjusting or limiting the position of the first adjusting member.

[0038] By setting up replaceable track movement mechanism 2 and tire movement mechanism 3, the tractor can work through track movement mechanism 2 when working on harsh ground, increasing the tractor's applicable environment. When the tractor is working in a normal environment or needs to be transferred to another environment, the replaceable tire movement mechanism 3 can improve the tractor's overall mobility, ensure the timeliness of the tractor's work, and reduce the cost of farming operations.

[0039] It should be noted that the hub and drive gear 4 mentioned in this device can be quickly disassembled and fixed to the drive shaft via bolts at corresponding positions.

[0040] like Figures 3-6 As shown, in this embodiment, threaded sleeves 13 and support sleeves 14 are installed on opposite sides of the connecting rod 8 perpendicular to the axis of the tensioning wheel 12; two sliding rods 15 are installed on the side of the adjusting bracket 11 near the support sleeve 14, the sliding rods 15 are slidably sleeved with the support sleeve 14, and the sliding rods 15 are longer than the support sleeve 14; the first adjusting component includes an adjusting bolt 17 threadedly connected to the threaded sleeve 13, one end of the adjusting bolt 17 abuts against the end of the sliding rod 15 away from the adjusting bracket 11, and the nut 18 of the adjusting bolt 17 is polygonal.

[0041] By setting the first adjusting component, when it is necessary to adjust the tension of the track 5, the adjusting nut 18 is rotated by a wrench that matches the number and size of the nut 18, thereby causing the adjusting bolt 17 to push the slide bar 15. The tensioning wheel 12 can then be driven by the adjusting bracket 11 to adjust the tension of the track 5. When it is necessary to replace the track 5, the adjusting nut 18 can be rotated in the opposite direction, causing the slide bar 15 to lose the support of the adjusting bolt 17. This causes the track 5 to press the tensioning wheel 12 under its own weight, causing the tensioning wheel 12 to move towards the side closer to the support sleeve 14, thereby loosening the track 5 and facilitating the disassembly and installation of the track 5.

[0042] In this embodiment, the diameter of the adjusting bolt 17 is larger than the diameter of the slide rod 15. The advantage of this setting is that it prevents the adjusting bolt 17 from being screwed into the support sleeve 14, which would cause the slide rod 15 to be squeezed out of the support sleeve 14, thus ensuring the support strength of the slide rod 15 during use.

[0043] like Figures 3-6As shown, in this embodiment, the number of sides of the nut 18 is even, and an adjustment hole 19 penetrating the nut 18 is provided on each of the opposite two sides of the nut 18; the second adjustment component includes an adjustment rod 20 that is inserted into the adjustment hole 19, and a handle 21 perpendicular to the axis of the adjustment rod 20 is installed at one end of the adjustment rod 20; a plurality of positioning holes 16 penetrating the connecting rod 8 are provided on one side of the connecting rod 8, and the plurality of positioning holes 16 are evenly arranged along the axis of the adjusting bolt 17. When the chassis 1 uses the track movement mechanism 2, the adjustment rod 20 simultaneously penetrates any positioning hole 16 and any adjustment hole 19 on the two nuts 18. The advantage of this design is that after adjusting the adjusting bolt 17 using the adjusting rod 20, the adjusting rod 20 can pass through the coaxial positioning hole 16 and the two adjusting holes 19, preventing the adjusting bolt 17 from rotating due to vibration during daily use. This ensures the tensioning effect of the tensioning wheel 12 on the track 5. Furthermore, the adjusting rod 20 can only pass through the predetermined positioning hole 16 and adjusting hole 19, ensuring the consistency of the positions of the two adjusting bolts 17 after adjustment. This also ensures the uniformity of force on the adjusting bracket 11 and the tensioning wheel 12, and improves the service life of the adjusting bracket 11 and the tensioning wheel 12.

[0044] like Figure 6 and Figure 7 As shown, in this embodiment, a limiting hole 22 is provided on the adjusting rod 20, and a limiting pin 23 is detachably connected to the limiting hole 22. The limiting pin 23 and the handle 21 are located on opposite sides of the two nuts 18. The advantage of this arrangement is that when the adjusting rod 20 is not needed, the limiting pin 23 is inserted into the limiting hole 22, and the adjusting rod 20 can be firmly fixed to the two nuts 18 by the limiting pin 23 and the handle 21. This is simple and effective. Furthermore, when the adjusting rod 20 needs to be removed, pressing the limiting pin 23 to disengage it from the limiting hole 22 can release the limiting of one end of the adjusting rod 20. Then, by holding the handle 21, the adjusting rod 20 can be pulled out from the adjusting hole 19 on the two nuts 18. This is simple and convenient.

[0045] like Figure 6 and Figure 7 As shown, in this embodiment, a limiting ring 25 is provided at the junction of the nut 18 and the adjusting bolt 17. A slot 26 is provided on the side of the handle 21 near the adjusting rod 20. The width of the slot 26 is adapted to the thickness of the limiting ring 25. The advantage of this setting is that when the adjusting rod 20 is not in use, the adjusting rod 20 can be inserted into any positioning hole 16 and the adjusting holes 19 on the two nuts 18. Push the handle 21 and rotate the adjusting handle 21 until the slot 26 engages with the limiting ring 25. This prevents the handle 21 from deflecting during the movement of the tractor, avoids the handle 21 from contacting the guide wheel 10 and causing wear, and improves the service life of the handle 21.

[0046] like Figure 7As shown, in this embodiment, the end of the adjusting rod 20 away from the handle 21 is provided with a tapered portion 24. The advantage of this design is that the tapered portion 24 increases the tolerance of the adjusting rod 20 when inserting into the adjusting hole 19, and improves the convenience of inserting the adjusting rod 20 into the adjusting hole 19.

[0047] like Figure 4 and Figure 7 As shown, in this embodiment, when the handle 21 is engaged with the limiting ring 25 through the slot 26, the axis of the handle 21 is parallel to the axis of the adjusting bolt 17, and one end of the handle 21 extends beyond the nut 18, generally by five to ten centimeters. The advantage of this setting is that when the adjusting rod 20 is used, there is enough space to hold the handle 21 and apply force to the handle 21, thus improving the ease of use of the handle 21.

[0048] The technical solution provided by this utility model, by setting up a replaceable track movement mechanism 2 and a tire movement mechanism 3, enables the tractor to work in harsh environments through the track movement mechanism 2, thereby increasing the tractor's applicable environment. When the tractor is working in a normal environment or needs to be transferred to another environment, the replaceable tire movement mechanism 3 improves the overall mobility of the tractor, ensures the timeliness of the tractor's work, and reduces the cost of farming operations.

[0049] By setting the first adjusting component, when it is necessary to adjust the tension of the track 5, the adjusting nut 18 is rotated by a wrench that matches the number and size of the nut 18, thereby causing the adjusting bolt 17 to push the slide bar 15. The tensioning wheel 12 can then be driven by the adjusting bracket 11 to adjust the tension of the track 5. When it is necessary to replace the track 5, the adjusting nut 18 can be rotated in the opposite direction, causing the slide bar 15 to lose the support of the adjusting bolt 17. This causes the track 5 to press the tensioning wheel 12 under its own weight, causing the tensioning wheel 12 to move towards the side closer to the support sleeve 14, thereby loosening the track 5 and facilitating the disassembly and installation of the track 5.

[0050] After adjusting the adjusting bolt 17 using the adjusting rod 20, the adjusting rod 20 can be passed through the coaxial positioning hole 16 and the two adjusting holes 19 to prevent the adjusting bolt 17 from rotating due to vibration during daily use, thereby ensuring the tensioning effect of the tensioning wheel 12 on the track 5. Furthermore, the adjusting rod 20 can only pass through the predetermined positioning hole 16 and adjusting hole 19 at predetermined positions, ensuring the consistency of the positions of the two adjusting bolts 17 after adjustment, ensuring the uniformity of force on the adjusting bracket 11 and the tensioning wheel 12, and improving the service life of the adjusting bracket 11 and the tensioning wheel 12.

[0051] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art can fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A tractor power chassis device, characterized in that, include: The chassis (1), multiple tracked motion mechanisms (2) and multiple tire motion mechanisms (3) are provided on opposite sides of the chassis (1), and the tracked motion mechanism (2) or the tire motion mechanism (3) can be installed on the drive shaft. The tracked motion mechanism (2) includes a drive gear (4) that is connected to the drive shaft. A support frame (7) that is rotatably sleeved with the drive shaft is also fixed on the chassis (1). A connecting rod (8) is fixed to the bottom of the support frame (7). A support roller (9) and multiple guide rollers (10) are rotatably connected to the bottom of the connecting rod (8). The support roller (9) is located on the same side of the multiple guide rollers (10). An adjusting bracket (11) is also installed on the connecting rod (8). The tensioning wheel (12) is rotatably connected to the adjusting bracket (11). The drive gear (4), support wheel (9), tensioning wheel (12) and multiple guide wheels (10) are covered with the same track (5). The inner ring of the track (5) is evenly provided with a number of internal driven teeth (6) that mesh with the drive gear (4). The support wheel (9), guide wheel (10) and tensioning wheel (12) are all provided with a relief groove in the middle. The internal driven teeth (6) can pass through the relief groove. The connecting rod (8) is also equipped with a first adjusting member for adjusting the position of the adjusting bracket (11) and thus tensioning the track (5) through the tensioning wheel (12), and a second adjusting member for adjusting or limiting the position of the first adjusting member.

2. The tractor power chassis device according to claim 1, characterized in that, The connecting rod (8) is equipped with threaded sleeves (13) and support sleeves (14) on opposite sides of the tension wheel (12) axis; The adjusting bracket (11) has two sliding rods (15) installed on the side near the support sleeve (14). The sliding rods (15) are slidably sleeved with the support sleeve (14), and the sliding rods (15) are longer than the support sleeve (14). The first adjusting component includes an adjusting bolt (17) that is threadedly connected to the threaded sleeve (13). One end of the adjusting bolt (17) abuts against the end of the slide rod (15) away from the adjusting bracket (11). The nut (18) of the adjusting bolt (17) is polygonal.

3. The tractor power chassis device according to claim 2, characterized in that, The diameter of the adjusting bolt (17) is larger than the diameter of the slide bar (15).

4. The tractor power chassis device according to claim 2, characterized in that, The number of sides of the nut (18) is even, and an adjustment hole (19) is provided on each of the opposite sides of the nut (18). The second adjusting member includes an adjusting rod (20) that is inserted into the adjusting hole (19), and one end of the adjusting rod (20) is fitted with a handle (21) that is perpendicular to the axis of the adjusting rod (20); The connecting rod (8) has multiple positioning holes (16) through it on one side. The multiple positioning holes (16) are evenly arranged along the axis of the adjusting bolt (17). When the chassis (1) uses the track movement mechanism (2), the adjusting rod (20) passes through any positioning hole (16) and any adjusting hole (19) on the two nuts (18) at the same time.

5. The tractor power chassis device according to claim 4, characterized in that, The adjusting rod (20) has a limiting hole (22), and a limiting pin (23) is detachably connected to the limiting hole (22). The limiting pin (23) and the handle (21) are located on opposite sides of the two nuts (18).

6. The tractor power chassis device according to claim 4, characterized in that, A limiting ring (25) is provided at the junction of the nut (18) and the adjusting bolt (17). A slot (26) is provided on the side of the handle (21) near the adjusting rod (20). The width of the slot (26) is adapted to the thickness of the limiting ring (25).

7. The tractor power chassis device according to claim 4, characterized in that, The adjusting rod (20) has a tapered portion (24) at the end away from the handle (21).

8. The tractor power chassis device according to claim 4, characterized in that, When the handle (21) is engaged with the limiting ring (25) through the slot (26), the axis of the handle (21) is parallel to the axis of the adjusting bolt (17), and one end of the handle (21) extends beyond the nut (18).

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