Gear shifting control mechanism of tractor

Abstract

The utility model relates to the technical field of tractor machinery, in particular to a tractor gear shifting control mechanism which comprises a speed change mechanism arranged on a tractor chassis and two control mechanisms arranged in a cab. A gear engaging device guide plate is fixedly arranged above the gear engaging device mounting seat, a gear shifting rocker arm is movably arranged on one side of the gear engaging device guide plate, and a gear engaging device gear selecting rocker arm is movably arranged on the other side of the gear engaging device guide plate; one end of each gear shifting flexible shaft is fixedly connected with the gear shifting rocker arm and the gear selecting rocker arm of the gear engaging device, and the speed change mechanism and the control mechanism are connected through the gear shifting flexible shafts. According to the tractor gear shifting control mechanism, the main speed changing gear lever slides on the gear engaging device guide plate to drive the gear shifting rocker arm to move, and gear shifting operation is achieved; the tractor gear shifting control mechanism has the advantages of being simple in structure, durable, reliable, capable of saving space and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to tractor mechanical technology field especially is tractor gear shifting control mechanism. BACKGROUND

[0002] In recent years, the development speed of tractor products in China is relatively fast, especially the large horsepower tractor, the user's requirement for the cab comfort and space is continuously improved, in order to save space, a new type of gear shifting control mechanism needs to be developed.

[0003] The Chinese patent with publication number CN110657232A discloses a tractor shuttle gear shifting control mechanism, which solves the problems of complicated structure and oil leakage of the original control mechanism, and the sealing part is arranged at the highest position of the bridge shell end cover, which reduces the risk of oil leakage, and the control handle is arranged near the driver's seat, which is convenient for operation, eliminates fatigue, improves the operation comfort, is convenient for assembly and disassembly, and beautifies the appearance and visual effect, but in the case that the gear shifting control mechanism is complicated to operate, easy to wear and complicated in structure, the problems of increased risk of operation failure and large space occupation are prone to occur. SUMMARY

[0004] The main purpose of the utility model is to provide a tractor gear shifting control mechanism to solve the problems in the related art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a tractor gear shifting control mechanism is provided, which comprises a gear shifting mechanism arranged on a tractor chassis and two control mechanisms arranged inside a cab, the control mechanism at least comprises a gear lever mounting seat fixed to a cab frame, a gear lever guide plate is fixedly arranged above the gear lever mounting seat, a gear shifting rocker arm is movably arranged on one side of the gear lever guide plate, and a gear lever selection rocker arm is movably arranged on the other side of the gear lever guide plate.

[0006] Further, the gear shifting mechanism at least comprises a gear shifting upper cover, two gear shifting control housings are fixedly installed on the gear shifting upper cover, an oil seal seat is inserted and connected in each of the two gear shifting control housings, and a transmission rod is inserted and connected in the oil seal seat.

[0007] Further, the transmission rod is welded with a gear shifting rocker arm at one end.

[0008] Further, a selection rocker arm is rotatably installed on the gear shifting control housing near one end of the gear shifting rocker arm.

[0009] Further, a selection rocker arm is rotatably installed on the gear shifting control housing near one end of the gear shifting rocker arm.

[0010] Further, the transmission rod one end is slidably installed with a selection shift knob, one side of the selection shift knob is fixedly connected with a thrust washer, the transmission rod is also fixedly connected with a thrust washer, and the two thrust washers are fixedly connected with a selection reset spring.

[0011] Further, the two operating mechanisms are respectively slidably provided with a main gear lever and a sub gear lever on the gear selector guide plate, the top of the main gear lever is fixedly connected with a main gear lever handball, and the top of the sub gear lever is fixedly connected with a sub gear lever handball.

[0012] Further, the main gear lever and the sub gear lever are connected with corresponding gear shift rocker arms and gear selector selection rocker arms.

[0013] Further, the main gear lever and the sub gear lever are connected with corresponding gear shift rocker arms and gear selector selection rocker arms.

[0014] Compared with the prior art, the tractor gear shift operating mechanism has the following beneficial effects:

[0015] In the tractor gear shift operating mechanism, the main gear lever is slidably arranged on the gear selector guide plate, drives the gear shift rocker arm to move, and realizes gear shift operation. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a tractor gear shift operating mechanism front view in the preferred embodiment of the utility model;

[0017] Figure 2 It is a tractor gear shift operating mechanism front view in the preferred embodiment of the utility model;

[0018] Figure 3 It is a tractor gear shift operating mechanism front view in the preferred embodiment of the utility model;

[0019] Figure 4 It is a tractor gear shift operating mechanism front view in the preferred embodiment of the utility model;

[0020] Figure 5 It is a tractor gear shift operating mechanism front view in the preferred embodiment of the utility model;

[0021] REFERENCE SIGNS:

[0022] 1. Main transmission handwheel; 2. Main transmission gear lever; 3. Gear shifter guide plate; 4. Gear shift rocker arm; 5. Gear shifter selection rocker arm; 6. Auxiliary transmission handwheel; 7. Gear shifter mounting base; 8. Auxiliary transmission gear lever; 9. Gear shift flexible shaft; 10. Main transmission flexible shaft bracket; 11. Auxiliary transmission shift bracket; 20. Transmission top cover; 21. Transmission control housing; 22. Oil seal seat; 25. Gear shift rocker arm; 26. Transmission rod; 28. Thrust washer; 29. ​​Gear selection return spring; 30. Gear selection dial; 31. Gear selection rocker arm; 32. Paddle shifter; 33. Rib; 34. Strip groove; 35. Paddle slot. Detailed Implementation

[0023] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0024] This embodiment provides a tractor shifting control mechanism, such as Figures 1 to 5 As shown, it includes a transmission mechanism arranged on the tractor chassis and two operating mechanisms arranged inside the cab. The transmission mechanism includes at least a transmission cover 20, on which a main transmission flexible shaft bracket 10 and a secondary transmission shift bracket 11 are fixedly connected.

[0025] Two gear shift control housings 21 are fixedly installed on the gear shift cover 20. An oil seal seat 22 is inserted into each of the two gear shift control housings 21, and a transmission rod 26 is inserted into the oil seal seat 22.

[0026] The operating mechanism includes two gear shifter mounting seats 7 fixed on the cab frame. Each gear shifter mounting seat 7 is fixedly provided with a gear shifter guide plate 3 above it. Each gear shifter guide plate 3 has a shift rocker arm 4 movably arranged on one side and a gear shifter selection rocker arm 5 movably arranged on the other side.

[0027] The main gear shift lever 2 and the auxiliary gear shift lever 8 are slidably mounted on the gear shift guide plate 3 of the two operating mechanisms, respectively. The top of the main gear shift lever 2 is fixedly connected to the main gear shift hand ball 1, and the top of the auxiliary gear shift lever 8 is fixedly connected to the auxiliary gear shift hand ball 6.

[0028] One end of the main gear shift lever 2 and the auxiliary gear shift lever 8 both pass through the gear shift guide plate 3 of the corresponding operating mechanism, and the main gear shift lever 2 and the auxiliary gear shift lever 8 are connected to the corresponding shift rocker arm 4 and the gear shift selector rocker arm 5.

[0029] Furthermore, the main gear shift lever 2 and the shift rocker arm 4, the main gear shift lever 2 and the gear selector rocker arm 5, the auxiliary gear shift lever 8 and the shift rocker arm 4, and the auxiliary gear shift lever 8 and the gear selector rocker arm 5 are all connected by spherical bearings.

[0030] When the driver operates the main shift knob 1 or the auxiliary shift knob 6, the operation force is transmitted to the shift arm 4 or the selector arm 5 through the main shift lever 2 and the auxiliary shift lever 8, so that the movement is transmitted to the gear shifting mechanism to realize the gear selection and shifting operation;

[0031] The gear shifting mechanism further comprises four gear shifting soft shafts 9, the end of each gear shifting soft shaft 9 is connected with a gear shifting arm 25 arranged on the gear shifting upper cover 20, one end of each gear shifting soft shaft 9 is fixedly connected with the shift arm 4 and the selector arm 5 respectively, the other end of the gear shifting soft shaft 9 penetrates through the main shift soft shaft support 10 and the auxiliary shift support 11 and is rotationally connected with the gear shifting arm 25, and the gear shifting mechanism and the operating mechanism are connected through the gear shifting soft shaft 9.

[0032] The transmission rod 26 is welded with the gear shifting arm 25 at one end.

[0033] The gear shifting operating shell 21 is further rotationally provided with a selector arm 31, the selector arm 31 is welded with the gear shifting arm 25, the bottom end of the selector arm 31 is fixedly provided with a shifting piece 32, the bottom surface of the selector shifting head 30 is provided with a shifting groove 35, and the end of the shifting piece 32 extends into the shifting groove 35.

[0034] The selector shifting head 30 is slidingly arranged at one end of the transmission rod 26, one thrust washer 28 is fixedly connected to one side of the selector shifting head 30, and one thrust washer 28 is also fixedly connected to the transmission rod 26, and a selector reset spring 29 is fixedly connected between the two thrust washers 28.

[0035] The surface of the transmission rod 26 is provided with a strip-shaped groove 34, the inside of the selector shifting head 30 is provided with a convex rib 33, and the convex rib 33 and the strip-shaped groove 34 are matched and embedded with each other, so that the selector shifting head 30 can slide on the transmission rod 26 and can also rotate synchronously with the transmission rod 26 when the transmission rod 26 rotates.

[0036] In specific use, when the gear shifting operation is performed, according to the target gear position, the main shift lever 2 or the auxiliary shift lever 8 is pushed forward and backward to drive the shift arm 4 to rotate clockwise (counterclockwise) around the joint bearing axis, the gear shifting soft shaft 9 is stretched or compressed to make the soft shaft core line inside the gear shifting soft shaft 9 stretch or contract, so that the gear shifting arm 25 connected to the other end of the gear shifting soft shaft 9 rotates around the oil seal seat 22 axis, drives the transmission rod 26 and the selector shifting head 30 to rotate, and the shifting piece on the sliding rod is actuated to move the sliding rod forward and backward when the selector shifting head 30 rotates, so as to realize the gear shifting operation.

[0037] When the gear selecting operation is performed, according to the target gear, the main gear shift lever 2 or the auxiliary gear shift lever 8 is pushed left and right, the connected gear selector shift arm 5 is swung around the ball center of the joint bearing, the gear shift soft shaft 9 is stretched or compressed, the soft shaft core line inside the gear shift soft shaft 9 is stretched or compressed, the gear shift soft shaft 9 connected to the other end of the gear shift soft shaft 9 drives the gear shift arm 25 to rotate the gear selector shift arm 31 around the oil seal seat 22 axis, drives the shift piece 32 to rotate, because the shift piece 32 extends into the shift groove 35 on the bottom surface of the gear selector shift head 30, the gear selector shift arm 31 can shift the gear selector shift head 30, slides left and right on the transmission rod 26, so that the gear selector shift head 30 can move back and forth between the two shift blocks to realize the gear selecting operation, when the gear selecting operation is performed, the gear selector shift head 30 slides along the transmission rod 26, drives the thrust washer 28 connected thereto to move, so that the gear selector return spring 29 is elastically deformed; after the gear selecting operation is completed, the gear selector return spring 29 uses its elastic restoring force to pull the gear selector shift head 30 back to the initial position, realizing the gear selecting reset function. This reset mechanism not only ensures the accuracy and reliability of the gear selecting operation, but also improves the service life of the gear shift control mechanism and reduces the failure caused by gear selecting failure or reset failure.

[0038] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments, but as long as the changes or modifications do not deviate from the technical solution of the present application, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

Claims

1. A tractor gear shifting control mechanism, comprising a gear shifting mechanism mounted on the tractor chassis and two control mechanisms mounted inside the cab, characterized in that, The operating mechanism includes at least a gear shifter mounting seat (7) fixed on the cab frame, a gear shifter guide plate (3) fixedly installed above the gear shifter mounting seat (7), a shift rocker arm (4) movably installed on one side of the gear shifter guide plate (3), and a gear shifter selection rocker arm (5) movably installed on the other side of the gear shifter guide plate (3). It also includes several shift flexible shafts (9), one end of which is fixedly connected to the shift rocker arm (4) and the gear selector rocker arm (5), and the transmission mechanism and the operating mechanism are connected through the shift flexible shafts (9).

2. The tractor shifting control mechanism according to claim 1, characterized in that, The transmission mechanism includes at least a transmission cover (20), on which two transmission control housings (21) are fixedly installed. An oil seal seat (22) is inserted into each of the two transmission control housings (21), and a transmission rod (26) is inserted into the oil seal seat (22).

3. The tractor shifting control mechanism according to claim 2, characterized in that, A shift rocker arm (25) is welded to one end of the transmission rod (26), and a gear selection rocker arm (31) is rotatably mounted on the gear shift control housing (21).

4. The tractor shifting control mechanism according to claim 2, characterized in that, A gear selection dial (30) is slidably installed at one end of the transmission rod (26), and a gear selection reset spring (29) is fixedly connected between the gear selection dial (30) and the transmission rod (26).

5. The tractor shifting control mechanism according to claim 1, characterized in that, The main gear shift lever (2) and the auxiliary gear shift lever (8) are slidably arranged on the gear shift guide plate (3) of the two operating mechanisms respectively. The top of the main gear shift lever (2) is fixedly connected to the main gear shift hand ball (1), and the top of the auxiliary gear shift lever (8) is fixedly connected to the auxiliary gear shift hand ball (6).

6. The tractor shifting control mechanism according to claim 5, characterized in that, The main gear shift lever (2) and the auxiliary gear shift lever (8) are both connected to the corresponding shift rocker arm (4) and gear selector rocker arm (5).

7. The tractor shifting control mechanism according to claim 2, characterized in that, The main transmission flexible shaft bracket (10) and the auxiliary transmission shift bracket (11) are fixedly connected to the transmission cover (20), and the other end of the shift flexible shaft (9) passes through both ends of the main transmission flexible shaft bracket (10) and the auxiliary transmission shift bracket (11) and is fixedly connected to them, and is fixedly connected to the shift rocker arm (25).

8. The tractor shifting control mechanism according to claim 2, characterized in that, The gear selector rocker arm (31) is also rotatably mounted on the gear shift control housing (21). The gear selector rocker arm (31) and the gear shift rocker arm (25) are welded together. A paddle (32) is fixed at the bottom end of the gear selector rocker arm (31). A groove (35) is provided on the bottom surface of the gear selector head (30). The end of the paddle (32) extends into the groove (35).

Images