Automatic transmission

Abstract

The utility model provides an automatic transmission which comprises a differential mechanism, two ends of the differential mechanism are respectively connected with a first half shaft and a second half shaft, the automatic transmission further comprises an input shaft, and the input shaft is respectively connected with a first clutch and a second clutch. The first clutch and the second clutch are correspondingly connected with the first rotating shaft and the second rotating shaft respectively; the first rotating shaft is a hollow shaft, and the second rotating shaft is coaxially nested in the first rotating shaft; the first rotating shaft is connected with a first gear of the input shaft, and the second rotating shaft is connected with a second gear of the input shaft; the input shaft first gear and the input shaft second gear are respectively connected with the intermediate shaft first gear and the intermediate shaft second gear; the intermediate shaft first gear and the intermediate shaft second gear are respectively arranged at two ends of the intermediate shaft; a shifting fork type gear shifting mode on a traditional manual box structure is effectively replaced, the overall automation level of the small-tonnage agricultural harvesting machine is improved, and the small-tonnage agricultural harvesting machine is suitable for industrial large-scale use and popularization.

Description

Technical Field

[0001] This utility model belongs to the field of small-tonnage agricultural harvesting machinery transmissions, and specifically relates to an automatic transmission. Background Technology

[0002] In the current technology, small-tonnage agricultural harvesting machinery usually refers to agricultural harvesting machinery with a capacity of 18-25 tons. Automatic transmissions have not yet appeared in such machinery because the current technology modifies the shifting module of the shift fork on the manual gearbox structure, which makes it difficult to achieve automatic shifting.

[0003] While automatic transmissions exist in the market for large-tonnage agricultural harvesting machinery ranging from 30 to 44 tons, these transmissions have a planetary gear set structure at the input end, making them quite complex, and they achieve gear shifting through a clutch.

[0004] In summary, existing small-tonnage agricultural harvesting machinery has a low degree of automation, and it is necessary to develop a transmission route suitable for small-tonnage agricultural harvesting machinery to achieve automation requirements while ensuring low cost. Utility Model Content

[0005] The purpose of this invention is to provide an automatic transmission to solve the problem of low automation in existing small-tonnage agricultural harvesting machinery.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] An automatic transmission includes a differential, with a first half-shaft and a second half-shaft respectively connected to both ends of the differential, and also includes an input shaft, which is respectively connected to a first clutch and a second clutch.

[0008] The first clutch and the second clutch are respectively connected to the first rotating shaft and the second rotating shaft;

[0009] The first rotating shaft is a hollow shaft, and the second rotating shaft is coaxially nested inside the first rotating shaft; the first rotating shaft is connected to the first gear of the input shaft, and the second rotating shaft is connected to the second gear of the input shaft;

[0010] The first input shaft gear and the second input shaft gear are respectively connected to the first intermediate shaft gear and the second intermediate shaft gear; the first intermediate shaft gear and the second intermediate shaft gear are respectively located at both ends of the intermediate shaft;

[0011] The first gear on the intermediate shaft is connected to the differential.

[0012] This utility model also has the following features:

[0013] Furthermore, a differential lock is provided within the differential.

[0014] Furthermore, a first service brake and a second service brake are respectively provided between the differential and the first half-shaft and the second half-shaft.

[0015] The second clutch is also connected to the parking brake.

[0016] Furthermore, the first clutch and the second clutch are located on the same side.

[0017] Furthermore, the central axes of the input shaft, the first rotating shaft, the second rotating shaft, the first gear of the input shaft, and the second gear of the input shaft are collinear.

[0018] Compared with the prior art, this utility model has the following technical effects:

[0019] This invention relates to an automatic transmission for small-tonnage agricultural harvesting machinery. It uses a fixed-axis gear train instead of a planetary gear set, which saves resource costs and simplifies the complexity of the entire system. The transmission completes gear shifting through the cooperation of a clutch and multiple gears, effectively replacing the shifting mode of the traditional manual gearbox structure. This improves the overall automation level of small-tonnage agricultural harvesting machinery and is suitable for large-scale industrial use and promotion. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the automatic transmission structure of this utility model.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Differential; 2. First half-shaft; 3. Second half-shaft; 4. Input shaft; 5. First clutch; 6. Second clutch; 7. First rotating shaft; 8. Second rotating shaft; 9. First gear of input shaft; 10. Second gear of input shaft; 11. First gear of intermediate shaft; 12. Second gear of intermediate shaft; 13. Intermediate shaft; 14. Differential lock; 15. First service brake; 16. Second service brake; 17. Parking brake. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, all components in this invention are known in the prior art. For example, the differential uses a commonly used differential.

[0024] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0025] like Figure 1As shown, an automatic transmission includes a differential 1, with a first half-shaft 2 and a second half-shaft 3 connected to its two ends respectively, and also includes an input shaft 4, which is connected to a first clutch 5 and a second clutch 6 respectively.

[0026] The first half-shaft 2 and the second half-shaft 3 are respectively connected to the wheel hub of the vehicle;

[0027] The first clutch 5 and the second clutch 6 are respectively connected to the first rotating shaft 7 and the second rotating shaft 8;

[0028] The first rotating shaft 7 is a hollow shaft, and the second rotating shaft 8 is coaxially nested inside the first rotating shaft 7; the first rotating shaft 7 is connected to the first gear 9 of the input shaft, and the second rotating shaft 8 is connected to the second gear 10 of the input shaft;

[0029] The first input shaft gear 9 and the second input shaft gear 10 are respectively connected to the first intermediate shaft gear 11 and the second intermediate shaft gear 12; the first intermediate shaft gear 11 and the second intermediate shaft gear 12 are respectively located at both ends of the intermediate shaft 13;

[0030] The first gear 11 of the intermediate shaft is connected to the differential 1. The first gear 11 and the second gear 12 of the intermediate shaft are fixedly connected to the intermediate shaft 13. The intermediate shaft 9 can rotate around the axis with the first gear 11 and the second gear 12 of the intermediate shaft.

[0031] The following is an explanation of the power transmission route in this embodiment:

[0032] The automatic transmission in this embodiment has two gears. When the automatic transmission is in one of the gears, the first clutch 5 is engaged, and the input shaft 4 transmits to the first gear 9 of the input shaft through the first clutch 5, and then transmits to the differential 1 through the first gear 11 of the intermediate shaft.

[0033] When the transmission is in another gear, the second clutch 6 engages, and the input shaft 4 transmits power to the second gear 10 of the input shaft through the second clutch 6, and then through the second gear 12 of the intermediate shaft, the intermediate shaft 9, and the first gear 11 of the intermediate shaft to the differential 1.

[0034] It should be noted that the instruction manual includes... Figure 1 This is only a schematic diagram of the automatic transmission structure in this embodiment, intended to illustrate the connection relationships between components.

[0035] As a preferred option, a differential lock 14 is provided in the differential 1 to improve the overall power distribution efficiency.

[0036] As a preferred embodiment, a first service brake 15 and a second service brake 16 are respectively provided between the differential 1 and the first half-shaft 2 and the second half-shaft 3;

[0037] The second clutch 6 is also connected to the parking brake 17.

[0038] The parking brake 16 can brake the second rotating shaft 8, reducing its rotational speed to 0.

[0039] As a preferred option, the first clutch 5 and the second clutch 6 are located on the same side, that is, on the same side of the vehicle. This structure designs the two clutches as a dual-clutch module, which simplifies the difficulty of disassembly, assembly and maintenance.

[0040] As a preferred embodiment, the central axes of input shaft 4, first rotating shaft 7, second rotating shaft 8, first gear of input shaft 9, and second gear of input shaft 10 are collinear; this structure is a preferred structure, and this arrangement has a higher overall integration.

[0041] The automatic transmission route in this embodiment can achieve both gear engagement and neutral. Neutral is achieved when the first clutch 5 and the second clutch 6 are disengaged.

[0042] When parking is required, the first clutch 5 and the second clutch 6 are disengaged, and the parking brake 17 is engaged. As a result, the second rotating shaft 8 and the second gear 10 of the input shaft are braked, and the speed is 0. Then, the differential 1 is braked through the second gear 12 of the intermediate shaft, the intermediate shaft 13, and the first gear 11 of the intermediate shaft, thereby achieving braking of the entire vehicle.

[0043] As one specific implementation, the parking brake 17, the first service brake 15, and the second service brake 16 can be wet friction pads, dry friction pads, or any other type.

Claims

1. An automatic transmission, comprising a differential (1), wherein a first half-shaft (2) and a second half-shaft (3) are respectively connected to both ends of the differential (1), characterized in that, It also includes an input shaft (4), which is connected to the first clutch (5) and the second clutch (6) respectively; The first clutch (5) and the second clutch (6) are respectively connected to the first rotating shaft (7) and the second rotating shaft (8); The first rotating shaft (7) is a hollow shaft, and the second rotating shaft (8) is coaxially nested inside the first rotating shaft (7); the first rotating shaft (7) is connected to the first gear (9) of the input shaft, and the second rotating shaft (8) is connected to the second gear (10) of the input shaft; The input shaft first gear (9) and input shaft second gear (10) are respectively connected to the intermediate shaft first gear (11) and intermediate shaft second gear (12); the intermediate shaft first gear (11) and intermediate shaft second gear (12) are respectively disposed at both ends of the intermediate shaft (13); The intermediate shaft first gear (11) is connected to the differential (1).

2. The automatic transmission as described in claim 1, characterized in that, The differential (1) is equipped with a differential lock (14).

3. The automatic transmission as described in claim 1, characterized in that, A first service brake (15) and a second service brake (16) are respectively provided between the differential (1), the first half-shaft (2), and the second half-shaft (3). The second clutch (6) is also connected to the parking brake (17).

4. The automatic transmission as described in claim 1, characterized in that, The first clutch (5) and the second clutch (6) are located on the same side.

5. The automatic transmission as described in claim 2, characterized in that, The central axes of the input shaft (4), the first rotating shaft (7), the second rotating shaft (8), the first gear of the input shaft (9), and the second gear of the input shaft (10) are collinear.

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