Tractor power reversing and high-low gear transmission device

Abstract

The utility model relates to a tractor power reversing and high-low gear transmission device, which is characterized in that a main shaft, an output shaft and an intermediate shaft are respectively arranged on a transmission box body, the input side of the main shaft is connected with a torsion damper, and a reverse gear clutch and a reverse gear driving gear of a reverse gear transmission assembly are arranged at the front part of the main shaft; the intermediate gear is installed on the intermediate shaft and can rotate freely, the reverse gear driven gear is installed on the front portion of the output shaft, and the intermediate gear is meshed with the reverse gear driving gear and the reverse gear driven gear; a high-gear clutch and a low-gear clutch of the high-low-gear transmission assembly are installed on the output shaft and located on the rear portion of the reverse-gear driven gear, and a first low-gear gear is connected to the low-gear clutch and meshed with a second low-gear gear installed on the main shaft. The first high-gear gear is connected to the high-gear clutch and meshed with a second high-gear gear installed on the main shaft. According to the utility model, the operation efficiency of a unit can be improved, the labor intensity of a machinist can be reduced, modular assembly can be realized, and the manufacturability is good.

Description

Technical Field

[0001] The utility model relates to a tractor power reversing and high and low gear transmission device, belonging to the technical field of wheeled tractor transmission systems. Background Art

[0002] The mechanical transmission system of a wheeled tractor amplifies and transmits engine torque to the tractor's drive wheels and power output, transferring engine power to drive the tractor through multiple gears. This power output is achieved through speed reduction and torque increase to meet varying operational requirements. Existing mechanical transmission systems feature a gearbox equipped not only with a main clutch but also with two shift clutches for power reversing, with high and low gear clutches used for shifting between high and low gears. This requires the operator to frequently switch gears during the tillage process, adapting to the type of work and soil structure, to accommodate the varying resistance requirements under varying operating conditions. Once the tiller reaches the edge of the field, it must repeatedly turn and reverse, performing reversing maneuvers to align with the transition row. Since the operator must disengage the corresponding clutch for each shift and reversal, the tiller's travel speed decreases or even stops, impacting operational efficiency and increasing the operator's workload. Summary of the Invention

[0003] The purpose of the utility model is to provide a tractor power reversing and high and low gear transmission device which can improve the operating efficiency of the unit, reduce the labor intensity of the operator, and realize modular assembly.

[0004] The technical solution of the utility model to achieve the above-mentioned purpose is: a tractor power reversing and high and low gear transmission device, characterized in that it includes a transmission box, a main shaft, an output shaft and an intermediate shaft, a reverse gear transmission assembly and a high and low gear transmission assembly;

[0005] The main shaft, output shaft and intermediate shaft are respectively mounted on the transmission housing, and the input side of the main shaft is connected to the torsional vibration damper;

[0006] The reverse gear transmission assembly includes a reverse gear clutch, a reverse gear driving gear, an intermediate gear and a reverse gear driven gear. The reverse gear clutch and the reverse gear driving gear are mounted on the front of the main shaft, the intermediate gear is mounted on the intermediate shaft and can rotate freely, and the reverse gear driven gear is mounted on the front of the output shaft. The intermediate gear is meshed with the reverse gear driving gear and the reverse gear driven gear.

[0007] The high and low gear transmission assembly includes a high gear clutch, a first high gear gear, a second high gear gear, and a low gear clutch, a first low gear gear and a second low gear gear; the high gear clutch and the low gear clutch are installed on the output shaft and are located behind the reverse gear driven gear, the first low gear gear is connected to the low gear clutch and meshes with the second low gear gear installed on the main shaft, and the first high gear gear is connected to the high gear clutch and meshes with the second high gear gear installed on the main shaft.

[0008] The utility model relates to a tractor power reversing and high-low gear transmission device. The reverse gear transmission assembly is mounted on the main shaft and the intermediate shaft, and the reverse clutch is mounted on the main shaft. The high-low gear transmission assembly is mounted on the main shaft and the output shaft. The reverse gear transmission assembly is arranged before the high-low gear transmission assembly. The high-speed clutch and the low-speed clutch are mounted on the output shaft and located behind the reverse gear clutch. Therefore, engine power is transmitted to the torsional vibration damper and then to the main shaft through the torsional vibration damper. Power reversal is first achieved by engaging and disengaging the reverse gear clutch, and high-low gear transmission is then achieved by engaging and disengaging the high-speed clutch and the low-speed clutch. Based on the existing mechanical shift tractor chassis, the original shaft system space can be fully utilized. Without modifying the original main and auxiliary transmission gearboxes and gear structure, the transmission system is simplified, thereby improving the operating efficiency of the unit and reducing the labor intensity of the operator. The utility model reduces the number of clutches, simplifies the structure, reduces manufacturing costs, and facilitates technical upgrades based on mechanical shifting. The utility model arranges the reverse gear transmission assembly and the high-low gear transmission assembly on both sides of the center wall panel, enabling modular assembly and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0010] Figure 1 The utility model is a structural diagram of a tractor power reversing and high and low gear transmission device.

[0011] Figure 2 yes Figure 1 A-direction structural diagram without reverse clutch.

[0012] Among them: 1-transmission housing, 2-intermediate shaft, 3-intermediate gear, 4-torsional vibration damper, 5-reverse clutch, 6-main shaft, 7-reverse driving gear, 8-reverse driven gear, 9-output shaft, 10-first low gear, 11-low gear clutch, 12-high gear clutch, 13-first high gear, 14-intermediate wall panel, 15-second low gear, 16-second high gear, 17-fixed wall panel. DETAILED DESCRIPTION

[0013] See Figure 1As shown, the utility model is a tractor power reversing and high and low gear transmission device, which includes a transmission box 1, a main shaft 6, an output shaft 9 and an intermediate shaft 2 as well as a reverse gear transmission component and a high and low gear transmission component.

[0014] See Figure 1 As shown, the main shaft 6, output shaft 9, and intermediate shaft 2 of the present invention are mounted on a transmission housing 1. The input side of the main shaft 6 is connected to a torsional vibration damper 4. Therefore, the engine power is transmitted to the main shaft 6 through the torsional vibration damper 4. The rear end of the main shaft 6 is a power output, providing power output for the implement suspended on the tractor. The power is output to the main transmission device through the rear end of the output shaft 9, providing the tractor with power for driving in various gears. The transmission housing 1 of the present invention is an existing mechanical transmission housing. Therefore, it can be technically upgraded based on mechanical shifting without changing the main and auxiliary transmissions and gear structures.

[0015] See Figure 1 As shown, an intermediate wall panel 14 and a fixed wall panel 17 are provided in the transmission case 1 of the present invention. The intermediate wall panel 14 is mounted on the assembly seat of the transmission case 1 by fasteners. The fixed wall panel 17 is a part of the transmission case 1. The main shaft 6 and the output shaft 9 are mounted on the intermediate wall panel 14 and the fixed wall panel 17 by bearings, and the intermediate shaft 2 is fixed on the intermediate wall panel 14 and the fixed wall panel 17. The reverse clutch 5 is located in front of the intermediate wall panel 14, and the high gear clutch 12 and the low gear clutch 11 are located at the rear of the intermediate wall panel 14, so as to realize convenient modular assembly, improve assembly efficiency, and have good processability.

[0016] See Figure 1 、 2 As shown, the reverse gear transmission assembly of the present invention includes a reverse gear clutch 5, a reverse gear driving gear 7, an intermediate gear 3 and a reverse gear driven gear 8. The reverse gear clutch 5 and the reverse gear driving gear 7 are mounted on the front of the main shaft 6, the intermediate gear 3 is mounted on the intermediate shaft 2 and can rotate freely, and the reverse gear driven gear 8 is mounted on the front of the output shaft 9. The intermediate gear 3 is engaged with the reverse gear driving gear 7 and the reverse gear driven gear 8. Figure 2 As shown, the main shaft 6, output shaft 9 and intermediate shaft 2 of the utility model are spatially arranged in the transmission case, and the reverse gear driving gear 7 and the reverse gear driven gear 8 are not directly engaged, but are engaged through the intermediate gear 3. The power reversing operation is achieved by operating the engagement and disengagement of the reverse gear clutch 5.

[0017] See Figure 1 、 2As shown, the reverse driving gear 7 of the utility model is provided on the rotating hub of the reverse clutch 5. The reverse driving gear 7 and the rotating hub of the reverse clutch 5 are an integral structure. The intermediate gear 3 is mounted on the intermediate shaft 2 through a bearing so that the intermediate gear 3 can rotate along the intermediate shaft 2. The reverse driven gear 8 is mounted on the front side of the output shaft 9 through a key. The reverse driven gear 8 is mounted on the output shaft 9 through a spline. By operating the engagement or disengagement of the reverse clutch 5, the reversing of the main transmission is controlled. The reverse clutch 5 of the utility model is an electro-hydraulic controlled wet clutch.

[0018] See Figure 1 As shown, the high and low gear transmission assembly of the present invention includes a high gear clutch 12, a first high gear 13, a second high gear 16, and a low gear clutch 11, a first low gear 10, and a second low gear 15. The high gear clutch 12 and the low gear clutch 11 are mounted on the output shaft 9 and located behind the reverse gear driven gear 8. The high gear clutch 12 and the low gear clutch 11 are electro-hydraulic controlled wet clutches. The first low gear 10 is connected to the low gear clutch 11 and meshes with the second low gear 15 mounted on the main shaft 6. The first high gear 13 is connected to the high gear clutch 12 and meshes with the second high gear 16 mounted on the main shaft 6. Therefore, by controlling the engagement and disengagement of the low gear clutch 11 and the high gear clutch 12, the output of power high and low gears is achieved through the output shaft 9.

[0019] See Figure 1 As shown, the first low gear 10 of the utility model is arranged on the rotating hub of the low gear clutch 11, and the first high gear 13 is arranged on the rotating hub of the high gear clutch 12. The first low gear 10 and the rotating hub of the low gear clutch 11 are an integrated structure. Similarly, the first high gear 13 and the rotating hub of the high gear clutch 12 are an integrated structure. The second low gear 15 and the second high gear 16 are connected to the main shaft 6 through a key. The second low gear 15 and the second high gear 16 are installed on the main shaft 6 through a spline. The power is output through the switching of the low gear clutch 11 and the high gear clutch 12 and the gear pair, and then the power is output through the output shaft 9.

[0020] See Figure 1 As shown, the low-gear clutch 11 of the present invention is located in front of the high-gear clutch 12, and the low-gear clutch 11 and the high-gear clutch 12 are integrated into an integral structure through a housing.

[0021] The tractor power reversing and high and low gear transmission device of the utility model is located between the tractor engine and the main gearbox. Figure 1 As shown, the power transmission routes under each gear working condition are as follows:

[0022] 1) Power reverse gear: torsional vibration damper 4 → main shaft 6 → reverse clutch 5 → reverse driving gear 7 → intermediate gear 3 → reverse driven gear 8 → output shaft 9 → main transmission. In power reverse gear, the reverse clutch 5 is engaged, while the high gear clutch 12 and the low gear clutch 11 are disengaged.

[0023] 2) Power low gear: torsional vibration damper 4 → main shaft 6 → second low gear 15 → first low gear 10 → low gear clutch 11 → output shaft 9 → main transmission. During this process, the low gear clutch 11 is engaged, while the reverse clutch 5 and the high gear clutch 12 are disengaged.

[0024] 3) Power high gear: torsional vibration damper 4 → main shaft 6 → second high gear 16 → first high gear 13 → high gear clutch 12 → output shaft 9 → main transmission. During this process, the high gear clutch 12 is engaged, and the reverse clutch 5 and the low gear clutch 11 are disengaged.

Claims

1. A tractor power reversing and high and low gear transmission device, characterized in that: It includes a transmission housing (1), a main shaft (6), an output shaft (9), an intermediate shaft (2), a reverse gear transmission assembly, and a high and low gear transmission assembly; The main shaft (6), output shaft (9) and intermediate shaft (2) are respectively mounted on the transmission housing (1), and the input side of the main shaft (6) is connected to the torsional vibration damper (4); The reverse gear transmission assembly comprises a reverse gear clutch (5), a reverse gear driving gear (7), an intermediate gear (3) and a reverse gear driven gear (8), wherein the reverse gear clutch (5) and the reverse gear driving gear (7) are mounted on the front of the main shaft (6), the intermediate gear (3) is mounted on the intermediate shaft (2) and can rotate freely, and the reverse gear driven gear (8) is mounted on the front of the output shaft (9), and the intermediate gear (3) is meshed with the reverse gear driving gear (7) and the reverse gear driven gear (8); The high and low gear transmission assembly comprises a high gear clutch (12), a first high gear gear (13), a second high gear gear (16), a low gear clutch (11), a first low gear gear (10) and a second low gear gear (15); the high gear clutch (12) and the low gear clutch (11) are mounted on the output shaft (9) and are located at the rear of the reverse gear driven gear (8); the first low gear gear (10) is connected to the low gear clutch (11) and meshes with the second low gear gear (15) mounted on the main shaft (6); the first high gear gear (13) is connected to the high gear clutch (12) and meshes with the second high gear gear (16) mounted on the main shaft (6).

2. A tractor power reversing and high and low gear transmission device according to claim 1, characterized in that: An intermediate wall panel (14) is provided in the transmission housing (1), and the intermediate wall panel (14) is mounted on an assembly seat of the transmission housing (1) via fasteners. The main shaft (6) and the output shaft (9) are mounted on the intermediate wall panel (14) and the fixed wall panel (17) via bearings. The intermediate shaft (2) is fixed on the intermediate wall panel (14) and the fixed wall panel (17). The reverse clutch (5) is located at the front of the intermediate wall panel (14), and the high gear clutch (12) and the low gear clutch (11) are located at the rear of the intermediate wall panel (14).

3. A tractor power reversing and high / low gear transmission device according to claim 1, characterized in that: The reverse gear driving gear (7) is arranged on the rotating hub of the reverse gear clutch (5), the intermediate gear (3) is mounted on the intermediate shaft (2) through a bearing, and the reverse gear driven gear (8) is mounted on the front side of the output shaft (9) through a key.

4. A tractor power reversing and high / low gear transmission device according to claim 1, characterized in that: The first low-speed gear (10) is arranged on the rotating hub of the low-speed clutch (11), the first high-speed gear (13) is arranged on the rotating hub of the high-speed clutch (12), and the second low-speed gear (15) and the second high-speed gear (16) are connected to the main shaft (6) via a key.

5. A tractor power reversing and high / low gear transmission device according to claim 1 or 4, characterized in that: The low-gear clutch (11) is located in front of the high-gear clutch (12), and the low-gear clutch (11) and the high-gear clutch (12) are integrated into an integral structure through a housing.

6. A tractor power reversing and high and low gear transmission device according to claim 1, characterized in that: The reverse clutch (5), high gear clutch (12) and low gear clutch (11) are wet clutches controlled by electro-hydraulic control.

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