Special inertia synchronizer and gearbox for agricultural tractor

Abstract

The utility model relates to the technical field of transmission variable-speed walking, in particular to an inertia synchronizer and a gearbox special for an agricultural tractor. An inertia synchronizer special for an agricultural tractor comprises a transmission shaft, a first transmission gear, a second transmission gear and a sliding gear sleeve are rotationally connected to the transmission shaft, a first connecting protrusion is arranged on the side, adjacent to the first transmission gear, of the sliding gear sleeve, and a connecting groove is formed in the side, adjacent to the sliding gear sleeve, of the first transmission gear. A second connecting protrusion is arranged on the side, opposite to the second transmission gear, of the sliding gear sleeve, a connecting inclined face is arranged on the side, opposite to the sliding gear sleeve, of the second transmission gear, and the side, away from the sliding gear sleeve, of the first connecting protrusion and the side, away from the sliding gear sleeve, of the second connecting protrusion are rotationally connected with speed measuring wheels. When the rotating speed detected by the tachometer wheel reaches a set threshold value, the sliding gear sleeve continues to be pushed, clamping of the sliding gear sleeve and the first transmission gear is achieved, gear shifting is completed, shutdown is not needed in the gear shifting process, and gear shifting is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission speed change and travel, in particular to an inertia synchronizer and a gearbox special for agricultural tractors. Background Art

[0002] When switching between forward and reverse gears, the gearbox of traditional large machinery such as agricultural tractors needs to stop the tractor first and then shift gears, and the shifting process is relatively cumbersome.

[0003] In order to solve the above problems, the present application provides an inertia synchronizer for an agricultural tractor, which solves the problem of the complicated shifting process of the existing synchronizer assembly and improves the shifting efficiency. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an inertia synchronizer specially used for agricultural tractors.

[0005] The technical solution adopted by the utility model to solve the technical problem is: an inertia synchronizer specially used for agricultural tractors, comprising a transmission shaft, on which a first transmission gear, a second transmission gear and a sliding gear sleeve are rotatably connected, and the sliding gear sleeve is located between the first transmission gear and the second transmission gear;

[0006] A first connecting protrusion is provided on the side of the sliding gear sleeve adjacent to the first transmission gear, a connecting groove is provided on the side of the first transmission gear adjacent to the sliding gear sleeve, a second connecting protrusion is provided on the side of the sliding gear sleeve opposite to the second transmission gear, a connecting inclined surface is provided on the side of the second transmission gear opposite to the sliding gear sleeve, and a side of the first connecting protrusion away from the sliding gear sleeve and a side of the second connecting protrusion away from the sliding gear sleeve are both rotatably connected to a speed measuring wheel.

[0007] As an optimization, a support rod is slidably connected to the sliding gear sleeve, and the first connecting protrusion and the second connecting protrusion are respectively connected to two ends of the support rod.

[0008] As an optimization, the lower part of the support rod is recessed to form a limit groove, the internal sliding connection of the limit groove is connected to a limit wedge block, a support spring is connected between the limit wedge block and the top of the limit groove, and the thickness of one end of the limit wedge block adjacent to the sliding gear sleeve is smaller than the thickness of the end of the limit wedge block away from the sliding gear sleeve.

[0009] As an optimization, the side of the first connecting protrusion away from the sliding gear sleeve and the side of the second connecting protrusion away from the sliding gear sleeve are both recessed to form an accommodating groove, the tachometer wheel is connected to the accommodating groove, and the wheel surface of the tachometer wheel passes through the opening of the accommodating groove and is arranged outside the accommodating groove.

[0010] As an optimization, a guide groove is provided inside the accommodating groove along the axial direction of the transmission shaft, the axle of the speed measuring wheel is slidably connected in the guide groove, and a tensioning spring is provided inside the guide groove.

[0011] As an optimization, a first bearing is connected between the first transmission gear and the transmission shaft, a second bearing is connected between the second transmission gear and the transmission shaft, a first connecting gear ring is provided in the axial direction of the first transmission gear, a second connecting gear ring is provided in the axial direction of the second transmission gear, a first connecting gear is provided on the side of the sliding gear sleeve opposite to the first connecting gear ring, and a second connecting gear is provided on the side of the sliding gear sleeve opposite to the second connecting gear ring.

[0012] As an optimization, a guide block is provided on the side of the first connecting gear opposite to the first connecting gear ring and on the side of the second connecting gear opposite to the second connecting gear ring, and the upper part of the guide block is tilted downward in a direction away from the sliding gear sleeve to form a pointed end.

[0013] As an optimization, the sliding gear sleeve is driven by a pneumatic system.

[0014] As an optimization, both ends of the transmission shaft are connected to the wheels respectively.

[0015] A gearbox comprises any one of the above-mentioned inertia synchronizers specifically for agricultural tractors.

[0016] The inertial synchronizer for agricultural tractors has the following advantages:

[0017] The present application respectively arranges a first connecting protrusion and a second connecting protrusion on both sides of the sliding gear sleeve. When the sliding gear sleeve is pushed, the first connecting protrusion contacts the first transmission gear or the second connecting protrusion contacts the second connecting gear. When the first connecting protrusion contacts the first transmission gear, the speed of the first transmission gear is detected by the speed measuring wheel. When the speed detected by the speed measuring wheel reaches a set threshold, the sliding gear sleeve continues to be pushed to achieve the engagement of the sliding gear sleeve with the first transmission gear and complete the gear shifting. The gear shifting process does not require shutdown, and the gear shifting is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a schematic diagram of the axial side of the utility model.

[0019] Attached Figure 2 It is a schematic diagram of the cutaway structure of the utility model.

[0020] Attached Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure of part A.

[0021] Attached Figure 4 This is a schematic diagram of the axial side of the utility model in use.

[0022] Among them, 1. transmission shaft, 2. first transmission gear, 3. second transmission gear, 4. sliding gear sleeve, 5. first connecting protrusion, 6. connecting groove, 7. second connecting protrusion, 8. speed measuring wheel, 9. support rod, 10. limiting groove, 11. limiting wedge block, 12. supporting spring, 13. receiving groove, 14. tightening spring, 15. first connecting gear ring, 16. second connecting gear ring, 17. first connecting gear, 18. second connecting gear, 19. guide block. DETAILED DESCRIPTION

[0023] like Figure 1-3 The embodiment shown is an inertia synchronizer for agricultural tractors, comprising a transmission shaft 1, on which a first transmission gear 2, a second transmission gear 3 and a sliding gear sleeve 4 are rotatably connected, and the sliding gear sleeve 4 is located between the first transmission gear 2 and the second transmission gear 3;

[0024] A first connecting protrusion 5 is provided on the side of the sliding gear sleeve 4 adjacent to the first transmission gear 2, a connecting groove 6 is provided on the side of the first transmission gear 2 adjacent to the sliding gear sleeve 4, a second connecting protrusion 7 is provided on the side of the sliding gear sleeve 4 opposite to the second transmission gear 3, a connecting inclined surface is provided on the side of the second transmission gear 3 opposite to the sliding gear sleeve 4, and a speed measuring wheel 8 is rotatably connected to the side of the first connecting protrusion 5 away from the sliding gear sleeve 4 and the side of the second connecting protrusion 7 away from the sliding gear sleeve 4.

[0025] In another embodiment, the first connecting protrusion 5 can be connected to the first transmission gear 2, and the second connecting protrusion 7 can also be arranged on the second transmission gear 3. Correspondingly, the connecting groove 6 should be arranged at a position where the sliding gear sleeve 4 is opposite to the first connecting protrusion 5.

[0026] like Figure 2 and Figure 3 As shown, a support rod 9 is slidably connected to the sliding gear sleeve 4, and a first connecting protrusion 5 and a second connecting protrusion 7 are respectively connected to two ends of the support rod 9.

[0027] The sliding gear sleeve 4 is slidably connected to the support rod 9 .

[0028] like Figure 2 and Figure 3 As shown, the lower part of the support rod 9 is recessed to form a limit groove 10, and the inner sliding connection of the limit groove 10 is a limit wedge block 11, and a support spring 12 is connected between the limit wedge block 11 and the top of the limit groove 10, and the thickness of the end of the limit wedge block 11 adjacent to the sliding gear sleeve 4 is smaller than the thickness of the end of the limit wedge block 11 away from the sliding gear sleeve 4.

[0029] The maximum thickness of the limiting wedge block 11 is greater than the depth of the limiting groove 10 , and a limiting end block should be provided at one end of the limiting wedge block 11 away from the transmission shaft 1 so that the limiting wedge block 11 cannot completely escape from the limiting groove 10 .

[0030] like Figure 3 As shown, the side of the first connecting protrusion 5 away from the sliding gear sleeve 4 and the side of the second connecting protrusion 7 away from the sliding gear sleeve 4 are both recessed to form a receiving groove 13, the speed measuring wheel 8 is connected to the receiving groove 13, and the wheel surface of the speed measuring wheel 8 passes through the opening of the receiving groove 13 and is arranged outside the receiving groove 13.

[0031] like Figure 3 As shown, a guide groove is provided inside the receiving groove 13 along the axial direction of the transmission shaft 1, the axle of the speed measuring wheel 8 is slidably connected in the guide groove, and a tensioning spring 14 is provided inside the guide groove.

[0032] Under the action of the tension spring 14 , the axle of the speed measuring wheel 8 is always located at the end of the guide groove away from the sliding gear sleeve 4 .

[0033] The wheel surface of the speed measuring wheel 8 is coated with an anti-skid layer having a certain elasticity, and the anti-skid pattern can be arranged on the outside of the anti-skid layer.

[0034] like Figure 1-3 As shown, a first bearing is connected between the first transmission gear 2 and the transmission shaft 1, a second bearing is connected between the second transmission gear 3 and the transmission shaft 1, a first connecting gear ring 15 is provided in the axial direction of the first transmission gear 2, a second connecting gear ring 16 is provided in the axial direction of the second transmission gear 3, a first connecting gear 17 is provided on the side of the sliding gear sleeve 4 opposite to the first connecting gear ring 15, and a second connecting gear 18 is provided on the side of the sliding gear sleeve 4 opposite to the second connecting gear ring 16.

[0035] like Figure 1-3 As shown, a guide block 19 is provided on the side of the first connecting gear 17 opposite to the first connecting gear ring 15 and on the side of the second connecting gear 18 opposite to the second connecting gear ring 16. The upper portion of the guide block 19 is tilted downward in a direction away from the sliding gear sleeve 4 to form a pointed end.

[0036] When the sliding gear sleeve 4 moves toward the first transmission gear 2 and the second transmission gear 3 , the guide block 19 improves the engagement efficiency between the first connecting gear 17 and the first connecting gear ring 15 , the second connecting gear 18 and the second connecting gear ring 16 .

[0037] The sliding gear sleeve 4 is driven by a pneumatic system.

[0038] Both ends of the transmission shaft 1 are connected to wheels respectively.

[0039] like Figure 4 As shown, a gearbox is characterized in that it includes an inertia synchronizer specifically for agricultural tractors as described in the above scheme.

[0040] The present application should also include a controller, which is connected to the speed measuring module of the speed measuring wheel 8.

[0041] When the device is used, it pushes the sliding gear sleeve 4 to move;

[0042] like Figure 1-3 As shown, taking the leftward movement as an example, the sliding gear ring pushes the first connecting protrusion 5 to the left, and under the action of the limiting wedge block 11, the movement of the sliding gear ring is resisted;

[0043] Under the action of thrust, the first connecting protrusion 5 contacts the annular surface of the connecting groove 6, and the wheel surface of the speed measuring wheel 8 contacts the bottom of the connecting groove 6, reaching a pre-synchronization state;

[0044] The speed difference between the first transmission gear 2 and the sliding gear sleeve 4 is detected by the speed measuring wheel 8, and a certain speed is preset by the controller. When it is detected that the speed of the first transmission gear 2 reaches the set threshold, the sliding gear sleeve 4 is continued to be pushed to move;

[0045] Under the action of the guide block 19, the first connecting gear 17 of the first transmission gear 2 is engaged with the first connecting gear ring 15 to complete the gear shifting.

[0046] When the sliding gear ring shifts rightward, or the first connecting protrusion 5 is located on the first transmission gear 2 and the second connecting protrusion 7 is located on the second transmission gear 3, the specific shifting process is the same as the principle of the above-mentioned shifting process.

[0047] The above-mentioned specific implementation is only a specific case of the present utility model. The patent protection scope of the present utility model includes but is not limited to the product form and style of the above-mentioned specific implementation. Any inertia synchronizer for agricultural tractors that complies with the claims of the present utility model and any appropriate changes or modifications made thereto by ordinary technicians in the corresponding technical field shall fall within the patent protection scope of the present utility model.

Claims

1. An inertia synchronizer for agricultural tractors, characterized in that: It comprises a transmission shaft (1), on which a first transmission gear (2), a second transmission gear (3) and a sliding gear sleeve (4) are rotatably connected, and the sliding gear sleeve (4) is located between the first transmission gear (2) and the second transmission gear (3); A first connecting protrusion (5) is provided on a side of the sliding gear sleeve (4) adjacent to the first transmission gear (2), a connecting groove (6) is provided on a side of the first transmission gear (2) adjacent to the sliding gear sleeve (4), a second connecting protrusion (7) is provided on a side of the sliding gear sleeve (4) opposite to the second transmission gear (3), a connecting inclined surface is provided on a side of the second transmission gear (3) opposite to the sliding gear sleeve (4), and a speed measuring wheel (8) is rotatably connected to a side of the first connecting protrusion (5) away from the sliding gear sleeve (4) and a side of the second connecting protrusion (7) away from the sliding gear sleeve (4).

2. The inertia synchronizer for agricultural tractors according to claim 1, characterized in that: A support rod (9) is slidably connected to the sliding gear sleeve (4), and a first connecting protrusion (5) and a second connecting protrusion (7) are respectively connected to two ends of the support rod (9).

3. The inertia synchronizer for agricultural tractors according to claim 2, characterized in that: The lower part of the support rod (9) is recessed to form a limiting groove (10), the limiting groove (10) is internally slidably connected to a limiting wedge block (11), a supporting spring (12) is connected between the limiting wedge block (11) and the top of the limiting groove (10), and the thickness of one end of the limiting wedge block (11) adjacent to the sliding gear sleeve (4) is smaller than the thickness of one end of the limiting wedge block (11) away from the sliding gear sleeve (4).

4. The inertia synchronizer for agricultural tractors according to claim 1, characterized in that: A side of the first connecting protrusion (5) away from the sliding gear sleeve (4) and a side of the second connecting protrusion (7) away from the sliding gear sleeve (4) are both recessed to form an accommodating groove (13), the speed measuring wheel (8) is connected to the accommodating groove (13), and the wheel surface of the speed measuring wheel (8) passes through the opening of the accommodating groove (13) and is arranged outside the accommodating groove (13).

5. The inertia synchronizer for agricultural tractors according to claim 4, characterized in that: A guide groove is provided inside the receiving groove (13) and is arranged along the axial direction of the transmission shaft (1). The axle of the speed measuring wheel (8) is slidably connected in the guide groove. A tensioning spring (14) is provided inside the guide groove.

6. The inertia synchronizer for agricultural tractors according to claim 1, characterized in that: A first bearing is connected between the first transmission gear (2) and the transmission shaft (1), a second bearing is connected between the second transmission gear (3) and the transmission shaft (1), a first connecting gear ring (15) is provided in the axial direction of the first transmission gear (2), a second connecting gear ring (16) is provided in the axial direction of the second transmission gear (3), a first connecting gear (17) is provided on the side of the sliding gear sleeve (4) opposite to the first connecting gear ring (15), and a second connecting gear (18) is provided on the side of the sliding gear sleeve (4) opposite to the second connecting gear ring (16).

7. The inertia synchronizer for agricultural tractors according to claim 6, characterized in that: A guide block (19) is provided on the side of the first connecting gear (17) opposite to the first connecting gear ring (15) and on the side of the second connecting gear (18) opposite to the second connecting gear ring (16), and the upper part of the guide block (19) is tilted downward in a direction away from the sliding gear sleeve (4) to form a pointed end.

8. The inertia synchronizer for agricultural tractors according to claim 1, characterized in that: The sliding gear sleeve (4) is driven by a pneumatic system.

9. The inertia synchronizer for agricultural tractors according to claim 1, characterized in that: Both ends of the transmission shaft (1) are connected to wheels respectively.

10. A gearbox, characterized in that: The invention comprises the inertia synchronizer specially used for agricultural tractors as described in any one of claims 1 to 9.

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