Hydraulic power gear shifting gearbox of harvester

Abstract

The utility model belongs to the technical field of agricultural machinery transmission equipment, and particularly relates to a hydraulic power shifting gearbox of a harvester, which comprises a box body and an input shaft rotationally connected onto the box body, the outer end of the input shaft extends out of the box body and is in transmission connection with an external power source, and a sun gear I is fixedly sleeved at the inner end of the input shaft; the input shaft is connected with the planet carrier through a high-gear clutch, the box body is connected with the box body through a low-gear clutch, the planet carrier is rotationally connected with a first planet wheel and a second planet wheel which rotate synchronously, the first sun wheel is meshed with the first planet wheel, and the input shaft is rotationally sleeved with a second sun wheel meshed with the second planet wheel. An output gear synchronously rotating with the second sun gear is meshed with input teeth of the differential mechanism assembly, and a left half shaft and a right half shaft of the differential mechanism assembly rotate and are connected to the box body in a penetrating mode. The planetary mechanism is matched with the high-gear clutch and the low-gear clutch, high-gear and low-gear switching of transmission gears is achieved, and the operation requirements of the harvester under different working conditions and loads can be effectively met.

Description

Technical field:

[0001] The utility model belongs to the technical field of agricultural machinery transmission equipment, in particular to a hydraulic power shift gearbox for a harvester. Background technology:

[0002] The existing domestic harvesting machinery gearbox shifting has great limitations, the operator has poor flexibility in controlling the harvester's travel speed, and is unable to quickly switch the output torque and vehicle speed according to actual working conditions and load. There are problems such as weak transmission travel, difficult shifting operations, and complex transmission structure. Summary of the invention:

[0003] The purpose of this utility model is to provide a hydraulic power shift gearbox for a harvester, which has stable transmission, simple structure, and convenient shifting operation. With the help of a planetary mechanism in conjunction with a high-gear clutch and a low-gear clutch, high and low gear switching of the transmission gear is achieved, which can effectively meet the operating requirements of the harvester under different working conditions and loads.

[0004] The utility model is achieved in this way:

[0005] A hydraulic power shift gearbox for a harvester includes a housing and an input shaft rotatably connected to the housing, the outer end of the input shaft extends out of the housing and is transmission-connected to an external power source, the inner end is fixedly sleeved with a sun gear 1, the input shaft is connected to a planetary carrier through a high-gear clutch, the housing is connected to the housing through a low-gear clutch, a planetary gear 1 and a planetary gear 2 that rotate synchronously are rotatably connected to the planetary carrier, sun gear 1 is meshed with planetary gear 1, a sun gear 2 that meshes with planetary gear 2 is rotatably sleeved on the input shaft, an output gear that rotates synchronously with sun gear 2 is meshed with the input teeth of a differential assembly, and the left and right half shafts of the differential assembly rotate and are connected through the housing.

[0006] In the above-mentioned hydraulic power shift gearbox for a harvester, an intermediate transmission shaft is rotatably connected in the box body, and an intermediate transmission gear 1 engaged with the output gear and an intermediate transmission gear 2 engaged with the input teeth of the differential assembly are fixedly sleeved on the intermediate transmission shaft.

[0007] In the above-mentioned hydraulic power shift transmission for a harvester, the planetary gear 1 and the planetary gear 2 are double gears with an integrated structure.

[0008] In the above-mentioned hydraulic power shift gearbox of a harvester, the differential assembly includes a differential housing, and a left half-shaft and a right half-shaft rotatably engaged with the differential housing. The left half-shaft or the right half-shaft is connected to the differential housing through a differential clutch, and the left half-shaft and the right half-shaft extending out of the differential housing are respectively connected to the housing through the service brake.

[0009] In the above-mentioned hydraulic power shift gearbox for a harvester, a hollow shaft sleeve is rotatably mounted on the input shaft, the second sun gear and the output gear are arranged on the hollow shaft sleeve, and the hollow shaft sleeve is connected to the housing through a transmission clutch.

[0010] The outstanding advantages of the utility model compared with the prior art are:

[0011] This utility model features stable transmission, simple structure, and convenient gear shifting. By leveraging a planetary mechanism in conjunction with a high- and low-gear clutch, it achieves high- and low-gear switching, effectively meeting the harvester's operational requirements under varying operating conditions and loads. Furthermore, when assembled in a harvester, the control system automatically adjusts power input and high- and low-gear switching based on actual operating conditions and loads, enabling automatic gear shifting and real-time adjustment of vehicle speed and torque output, resulting in highly efficient order changes. Description of the drawings:

[0012] Figure 1 This is a schematic diagram of the power transmission machinery of the present utility model.

[0013] In the figure: 1. Case; 2. Input shaft; 3. Sun gear 1; 4. High gear clutch; 5. Planet carrier; 6. Low gear clutch; 7. Planet gear 1; 8. Planet gear 2; 9. Sun gear 2; 10. Output gear; 11. Left half shaft; 12. Right half shaft; 13. Intermediate transmission shaft; 14. Intermediate transmission gear 1; 15. Intermediate transmission gear 2; 16. Differential housing; 17. Differential clutch; 18. Service brake; 19. Hollow shaft sleeve; 20. Transmission clutch. Specific implementation method:

[0014] The present invention is further described below with reference to specific embodiments. Figure 1 :

[0015] A hydraulic power shift transmission for a harvester includes a housing 1 and an input shaft 2 rotatably connected to the housing 1. The outer end of the input shaft 2 extends outside the housing 1 and is transmission-connected to an external power source, and the inner end is fixedly sleeved with a sun gear 1 3. The input shaft 2 is connected to a planetary carrier 5 via a high-speed clutch 4. The housing 1 is connected to the housing 1 via a low-speed clutch 6. Planetary carrier 5 is rotationally connected with planetary gear 1 7 and planetary gear 2 8 that rotate synchronously. Sun gear 1 3 meshes with planetary gear 1 7. Sun gear 2 9 that meshes with planetary gear 2 8 is rotatably sleeved on the input shaft 2. An output gear 10 that rotates synchronously with sun gear 2 9 meshes with the input teeth of a differential assembly. The left and right half shafts 11 and 12 of the differential assembly rotate and extend through the housing 1. In this embodiment, the external power source is a power motor, and the high-speed clutch 4, the low-speed clutch 6, the differential clutch 17, and the service brake 18 are all hydraulically driven.

[0016] The utility model has stable transmission, simple structure and convenient shifting operation. By means of the cooperation of the planetary mechanism with the high-speed clutch 4 and the low-speed clutch 6, the high and low gear switching of the transmission gear is realized, which can effectively meet the operation requirements of the harvester under different working conditions and loads. Moreover, when assembled into the harvester, it can automatically adjust the power input and high and low gear switching according to the actual working conditions and loads with the control system, realize automatic shifting, adjust the vehicle speed and torque output in real time, and has high shifting efficiency.

[0017] In order to further improve the transmission stability and increase the magnitude of the output torque, an intermediate transmission shaft 13 is rotatably connected in the box body 1. An intermediate transmission gear one 14 meshing with the output gear 10 and an intermediate transmission gear two 15 meshing with the input gear of the differential assembly are fixedly sleeved on the intermediate transmission shaft 13. And, in this embodiment, the number of teeth of the intermediate transmission gear one 14 is greater than that of the intermediate transmission gear two 15.

[0018] And, in order to make the planetary gear one 7 and the planetary gear two 8 rotate synchronously and reduce the part cost, the planetary gear one 7 and the planetary gear two 8 are a double gear with an integral structure.

[0019] In order to enable the left half shaft 11 and the right half shaft 12 of the differential assembly to rotate synchronously for the harvester to travel on muddy, potholed and other bad road conditions, the differential assembly includes a differential housing 16, and the left half shaft 11 and the right half shaft 12 rotatably fitted on the differential housing 16. The left half shaft 11 or the right half shaft 12 is connected to the differential housing 16 through a differential clutch 17. And, in order to be able to perform braking operations, the left half shaft 11 and the right half shaft 12 extending outside the differential housing 16 are respectively connected to the box body 1 through service brakes 18. At the same time, a hollow shaft sleeve 19 is rotatably sleeved on the input shaft 2, the sun gear two 9 and the output gear 10 are arranged on the hollow shaft sleeve 19, and the hollow shaft sleeve 19 is connected to the box body 1 through a transmission clutch 20.

[0020] The power transmission route of the utility model:

[0021] Low-speed transmission route (the low-speed clutch 6 is engaged, and the planet carrier 5 is fixed to the box body 1): external power source motor input → input shaft 2 → sun gear one 3 → synchronously rotating planetary gear one 7 and planetary gear two 8 → synchronously rotating sun gear two 9 and output gear 10 → synchronously rotating intermediate transmission gear one 14 and intermediate transmission gear two 15 → differential assembly → left half shaft 11 and right half shaft 12.

[0022] High-speed transmission route (the high-speed clutch 4 is engaged, and the planet carrier 5 is fixed to the input shaft 2): external power source motor input → input shaft 2 → the planet carrier 5 and the hollow shaft sleeve 19 both rotate synchronously with the input shaft 2 → synchronously rotating intermediate transmission gear one 14 and intermediate transmission gear two 15 → differential assembly → left half shaft 11 and right half shaft 12.

[0023] The above embodiments are only one of the preferred embodiments of the present utility model, and do not limit the scope of implementation of the present utility model. Therefore, all equivalent changes made according to the shape, structure, and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A hydraulic power shift transmission for a harvesting machine, characterized in that: It includes a box body (1) and an input shaft (2) rotatably connected to the box body (1). The outer end of the input shaft (2) extends outside the box body (1) and is in transmission connection with an external power source, and a first sun gear (3) is fixedly sleeved on the inner end. The input shaft (2) is connected to a planet carrier (5) through a high-speed clutch (4), and the box body (1) is connected to the box body (1) through a low-speed clutch (6). A first planet gear (7) and a second planet gear (8) that rotate synchronously are rotatably connected to the planet carrier (5). The first sun gear (3) meshes with the first planet gear (7), and a second sun gear (9) that meshes with the second planet gear (8) is rotatably sleeved on the input shaft (2). An output gear (10) that rotates synchronously with the second sun gear (9) meshes with the input gear of the differential assembly. The left half shaft (11) and the right half shaft (12) of the differential assembly rotate and are connected through the box body (1).

2. The hydraulic power shift transmission of a harvester according to claim 1, characterized in that: A middle transmission shaft (13) is rotatably connected inside the box body (1). A first intermediate transmission gear (14) that meshes with the output gear (10) and a second intermediate transmission gear (15) that meshes with the input gear of the differential assembly are fixedly sleeved on the middle transmission shaft (13).

3. A hydraulic power shift transmission for a harvester according to claim 1, characterized in that: The first planet gear (7) and the second planet gear (8) are an integral two-piece gear.

4. A hydraulic power shift transmission for a harvester according to claim 1, characterized in that: The differential assembly includes a differential housing (16), and the left half shaft (11) and the right half shaft (12) rotatably fitted on the differential housing (16). The left half shaft (11) or the right half shaft (12) is connected to the differential housing (16) through a differential clutch (17). The left half shaft (11) and the right half shaft (12) extending outside the differential housing (16) are respectively connected to the box body (1) through service brakes (18).

5. A hydraulic power shift transmission for a harvester according to claim 1, characterized in that: A hollow shaft sleeve (19) is rotatably sleeved on the input shaft (2). The second sun gear (9) and the output gear (10) are arranged on the hollow shaft sleeve (19). The hollow shaft sleeve (19) is connected to the box body (1) through a transmission clutch (20).

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