Shuttle type gear shifting gear mechanism of tractor

Abstract

The utility model discloses a shuttle type gear shifting gear mechanism of a tractor, and relates to the field of tractor gear shifting. The shuttle type gear shifting gear mechanism comprises a gear shifting unit, a gear unit is arranged on one side of the gear shifting unit, a gear shifting box is arranged on the outer side of the gear shifting unit and the gear unit, the gear shifting unit comprises a gear shifting shaft, a quick release assembly, a meshing sleeve and a meshing block, the quick release assembly is arranged at one end of the gear shifting shaft, and the meshing block is arranged on one side of the meshing sleeve. The quick release assembly comprises a screwing sleeve, a threaded sleeve and a tightening block, the front end of the screwing sleeve is arranged to be in a circular truncated cone shape, the threaded sleeve is in threaded connection with the screwing sleeve, and the tightening block is arranged at the front end of the threaded sleeve. According to the shuttle type gear shifting gear mechanism, the meshing sleeve can be quickly disassembled by arranging the quick disassembling assembly, so that when the meshing sleeve is replaced, the whole shuttle type gear shifting mechanism or related parts do not need to be replaced, the repairing cost is reduced, and the overhauling efficiency of the shuttle type gear shifting gear mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tractor gear shifting, in particular to a shuttle-type gear shifting mechanism for a tractor. Background Art

[0002] The shuttle shift gear mechanism of the tractor is an important part of the tractor transmission system. It allows the driver to adjust the shuttle position by operating the handle and control the gear position of the tractor quickly and conveniently.

[0003] The core of the shuttle-shift gear mechanism is the shuttle (also known as the shuttle shift sleeve) that can quickly move and engage between different gears, thereby achieving rapid gear changes. This shifting method is faster and more convenient than conventional manual shifting, and is also more suitable for some special working environments.

[0004] The engagement sleeve of the existing shuttle-type shift gear mechanism is easily impacted and worn during operation and needs to be repaired and replaced. However, most engagement sleeves are fixed or difficult to disassemble, so when replacing the engagement sleeve, the entire shuttle-type shift mechanism or related components must be replaced, which results in high repair costs. Utility Model Content

[0005] In view of the deficiencies of the prior art, the utility model provides a shuttle-type shift gear mechanism for a tractor, which solves the problem that most engaging sleeves are fixedly installed or difficult to disassemble, so that when replacing the engaging sleeve, the entire shuttle-type shift mechanism or related components need to be replaced, resulting in high repair costs.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A shuttle-type shift gear mechanism for a tractor includes a shift unit, a gear unit is provided on one side of the shift unit, and a shift box is provided on the outside of the shift unit and the gear unit;

[0007] The shift unit includes a shift shaft, a quick release assembly, an engagement sleeve, and an engagement block. The shift shaft is rotatably connected to the shift box. The quick release assembly is provided at one end of the shift shaft. The engagement sleeve is connected to the quick release assembly. The engagement block is provided on one side of the engagement sleeve and is movably engaged with the engagement sleeve.

[0008] The quick-release assembly includes a tightening sleeve, a threaded sleeve and a tightening block. The front end of the tightening sleeve is configured to be truncated into a cone shape. The threaded sleeve and the tightening sleeve are threadedly connected. The tightening block is arranged at the front end of the threaded sleeve.

[0009] Preferably, the threaded sleeve is fixedly sleeved on the shift shaft.

[0010] Preferably, the front end of the tightening sleeve abuts against the tightening block.

[0011] Preferably, the shift unit also includes a first gear, a connecting rod, a second gear and an idler gear, the first gear is fixedly sleeved on the shift shaft, one end of the connecting rod is rotatably connected to the shift shaft, the second gear is arranged on one side of the engagement block, the idler gear is fixedly sleeved on the other end of the connecting rod, and the idler gear is movably engaged with the second gear.

[0012] Preferably, a rotating shaft is provided on one side of the engagement block, the engagement block is fixedly connected to one end of the rotating shaft, and the second gear is fixedly connected to the rotating shaft.

[0013] Preferably, one side of the engagement sleeve is fixedly connected with an insertion rod, the insertion rod is inserted into the tightening sleeve and the threaded sleeve, and the insertion rod abuts against the tightening block.

[0014] Preferably, the quick-release assembly further comprises a fastening bolt, which passes through the tightening sleeve and the threaded sleeve and is threadedly connected in the insertion rod.

[0015] Preferably, the gear unit includes a speed change shaft, a forward gear and a reverse gear. The speed change shaft is rotatably connected in the shift box, and the forward gear and the reverse gear are fixedly sleeved on the speed change shaft.

[0016] Preferably, the forward gear is meshed with the first gear, and the reverse gear is movably meshed with the idle gear.

[0017] The utility model discloses a shuttle-type shift gear mechanism for a tractor, which has the following beneficial effects:

[0018] By providing a quick-release assembly, the fastening bolt is loosened to move the fastening bolt out of the insertion rod, and the tightening sleeve is rotated to move the tightening sleeve outward, so that the frustum-shaped block at the front end of the tightening sleeve does not abut against the tightening block, so that the insertion rod can be removed from the threaded sleeve, and then the engaging sleeve can be quickly removed. When replacing the engaging sleeve, there is no need to replace the entire shuttle shift mechanism or related components, which not only reduces the repair cost but also improves the maintenance efficiency of the shuttle shift gear mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the structure of the utility model;

[0021] Figure 2This is a schematic diagram of the structure of the shift unit and the gear position unit of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the quick-release assembly of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the meshing sleeve of the utility model.

[0024] In the figure: 1. Shift box; 2. Shift unit; 21. Shift shaft; 22. First gear; 23. Connecting rod; 24. Quick release assembly; 241. Tightening sleeve; 242. Threaded sleeve; 243. Tightening block; 244. Fastening bolt; 25. Engaging sleeve; 251. Insert rod; 26. Engaging block; 27. Second gear; 28. Idle gear; 3. Shift unit; 31. Speed ​​change shaft; 32. Forward gear; 33. Reverse gear. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] The embodiment of the utility model discloses a shuttle-type shifting gear mechanism for a tractor.

[0027] According to the attached Figure 1-4 As shown, it includes a shift unit 2, a gear unit 3 is provided on one side of the shift unit 2, and a shift box 1 is provided on the outside of the shift unit 2 and the gear unit 3. The shift unit 2 includes a shift shaft 21, a quick release assembly 24, an engagement sleeve 25 and an engagement block 26. The shift shaft 21 is rotatably connected in the shift box 1, the quick release assembly 24 is provided at one end of the shift shaft 21, the engagement sleeve 25 is connected to the quick release assembly 24, the engagement block 26 is provided on one side of the engagement sleeve 25, and the engagement block 26 is movably engaged with the engagement sleeve 25.

[0028] Specifically disclosed, the quick-release assembly 24 includes a tightening sleeve 241, a threaded sleeve 242 and a tightening block 243. The front end of the tightening sleeve 241 is arranged to be truncated cone-shaped, the threaded sleeve 242 and the tightening sleeve 241 are threadedly connected, and the tightening block 243 is arranged at the front end position of the threaded sleeve 242. Rotating the tightening sleeve 241 can make the tightening sleeve 241 move outward, so that the truncated cone-shaped block at the front end of the tightening sleeve 241 does not abut against the tightening block 243, so that the insertion rod 251 can be removed from the threaded sleeve 242, and then the engaging sleeve 25 can be quickly removed, so that when replacing the engaging sleeve 25, there is no need to replace the entire shuttle shift mechanism or related components, which not only reduces the repair cost but also improves the maintenance efficiency of the shuttle shift gear mechanism.

[0029] Furthermore, the threaded sleeve 242 is fixedly sleeved on the shift shaft 21 , so that the engagement sleeve 25 is fixedly inserted into the threaded sleeve 242 , thereby connecting the engagement sleeve 25 to the shift shaft 21 .

[0030] Furthermore, the front end of the tightening sleeve 241 abuts against the tightening block 243 , and by rotating the tightening sleeve 241 , the tightening block 243 can be tightened and loosened, thereby achieving tightening and loosening of the insertion rod 251 .

[0031] Furthermore, the shift unit 2 also includes a first gear 22, a connecting rod 23, a second gear 27 and an idler gear 28. The first gear 22 is fixedly sleeved on the shift shaft 21, one end of the connecting rod 23 is rotatably connected to the shift shaft 21, the second gear 27 is arranged on one side of the engaging block 26, the idler gear 28 is fixedly sleeved on the other end of the connecting rod 23, and the idler gear 28 is movably engaged with the second gear 27.

[0032] Furthermore, a rotating shaft is provided on one side of the engagement block 26 , the engagement block 26 is fixedly connected to one end of the rotating shaft, and the second gear 27 is fixedly connected to the rotating shaft.

[0033] Furthermore, an insert rod 251 is fixedly connected to one side of the engagement sleeve 25 . The insert rod 251 is inserted into the tightening sleeve 241 and the threaded sleeve 242 , and the insert rod 251 abuts against the tightening block 243 .

[0034] Furthermore, the quick-release assembly 24 also includes a fastening bolt 244, which passes through the tightening sleeve 241 and the threaded sleeve 242 and is threadedly connected to the insertion rod 251. By providing the fastening bolt 244, the insertion rod 251 is reinforced for the second time, so that the engaging sleeve 25 is more stably connected to the shift shaft 21.

[0035] Furthermore, the gear unit 3 includes a speed change shaft 31 , a forward gear 32 and a reverse gear 33 . The speed change shaft 31 is rotatably connected to the shift box 1 , and the forward gear 32 and the reverse gear 33 are fixedly sleeved on the speed change shaft 31 .

[0036] Furthermore, the forward gear 32 is meshed and connected with the first gear 22 , and the reverse gear 33 is movably meshed with the idle gear 28 .

[0037] It should be noted that the meshing surfaces of the gears, meshing block 26 and meshing sleeve 25 are all rounded to make meshing easier and reduce connection jams between the gears.

[0038] Working principle: When the first gear 22 is engaged with the forward gear 32, the shift shaft 21 rotates in the opposite direction, causing the first gear 22 to rotate in the opposite direction and drive the forward gear 32 to rotate forward, thereby driving the speed change shaft 31 to rotate forward, which is the forward gear. When it is necessary to change to the reverse gear, the shift handle is operated to drive the shift shaft 21 to move, so that the first gear 22 is separated from the forward gear 32, and the meshing sleeve 25 is driven to be sleeved on the meshing block 26. At the same time, the connecting rod 23 drives the idler gear 28 to engage with the second gear 27 and the reverse gear 33, so that the shift shaft 21 drives the rotating shaft to rotate in the opposite direction, thereby driving the second gear 27 to rotate in the opposite direction. The reverse rotation of the second gear 27 drives the idler gear 28 to move forward, and then drives the reverse gear 33 to move in the opposite direction, which is the reverse gear, completing the shuttle shift.

[0039] When the engaging sleeve 25 needs to be replaced, first loosen the fastening bolt 244 so that the fastening bolt 244 moves out of the insertion rod 251, and then rotate the tightening sleeve 241 to move the tightening sleeve 241 outward so that the frustum-shaped block at the front end of the tightening sleeve 241 does not abut against the tightening block 243, so that the insertion rod 251 is removed from the threaded sleeve 242, and then the engaging sleeve 25 can be quickly removed, and the insertion rod 251 of the new engaging sleeve 25 is inserted into the tightening sleeve 241 and the threaded sleeve 242, and the tightening sleeve 241 is tightened to drive the frustum-shaped block to squeeze the tightening block 243, and the tightening block 243 is fixed against the insertion rod 251, and then the fastening bolt 244 is tightened to complete the secondary reinforcement of the engaging sleeve 25.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A shuttle-type shift gear mechanism for a tractor, comprising a shift unit (2), characterized in that: A gear unit (3) is provided on one side of the gear shift unit (2), and a gear shift box (1) is provided on the outsides of the gear shift unit (2) and the gear unit (3); The shift unit (2) comprises a shift shaft (21), a quick-release assembly (24), an engagement sleeve (25) and an engagement block (26); the shift shaft (21) is rotatably connected to the shift box (1); the quick-release assembly (24) is arranged at one end of the shift shaft (21); the engagement sleeve (25) is connected to the quick-release assembly (24); the engagement block (26) is arranged on one side of the engagement sleeve (25), and the engagement block (26) is movably engaged with the engagement sleeve (25); The quick-release assembly (24) comprises a tightening sleeve (241), a threaded sleeve (242) and a tightening block (243); the front end of the tightening sleeve (241) is configured to be truncated cone-shaped; the threaded sleeve (242) and the tightening sleeve (241) are threadedly connected; and the tightening block (243) is disposed at the front end of the threaded sleeve (242).

2. A shuttle-type shift gear mechanism for tractors according to claim 1, characterized in that: The threaded sleeve (242) is fixedly sleeved on the shift shaft (21).

3. The shuttle-type shift gear mechanism for tractors according to claim 1, characterized in that: The front end of the tightening sleeve (241) abuts against the tightening block (243).

4. The shuttle-type shift gear mechanism for tractors according to claim 1, characterized in that: The shift unit (2) further comprises a first gear (22), a connecting rod (23), a second gear (27) and an idler gear (28); the first gear (22) is fixedly sleeved on the shift shaft (21); one end of the connecting rod (23) is rotatably connected to the shift shaft (21); the second gear (27) is arranged on one side of the engagement block (26); the idler gear (28) is fixedly sleeved on the other end of the connecting rod (23), and the idler gear (28) is movably engaged with the second gear (27).

5. A shuttle-type shift gear mechanism for tractors according to claim 4, characterized in that: A rotating shaft is provided on one side of the engagement block (26), the engagement block (26) is fixedly connected to one end of the rotating shaft, and the second gear (27) is fixedly connected to the rotating shaft.

6. The shuttle-type shift gear mechanism for tractors according to claim 1, characterized in that: One side of the engagement sleeve (25) is fixedly connected with an insertion rod (251), the insertion rod (251) is inserted into the tightening sleeve (241) and the threaded sleeve (242), and the insertion rod (251) abuts against the tightening block (243).

7. A shuttle-type shift gear mechanism for tractors according to claim 6, characterized in that: The quick-release assembly (24) further comprises a fastening bolt (244), wherein the fastening bolt (244) passes through the tightening sleeve (241) and the threaded sleeve (242) and is threadedly connected to the insertion rod (251).

8. The shuttle-type shift gear mechanism for tractors according to claim 1, characterized in that: The gear unit (3) comprises a speed change shaft (31), a forward gear (32) and a reverse gear (33); the speed change shaft (31) is rotatably connected in the shift box (1); and the forward gear (32) and the reverse gear (33) are fixedly sleeved on the speed change shaft (31).

9. The shuttle-type shift gear mechanism for a tractor according to claim 8, characterized in that: The forward gear (32) is meshed and connected with the first gear (22), and the reverse gear (33) is movably meshed with the idle gear (28).

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