Power takeoff adding structure of automatic transmission

Abstract

A power takeoff structure of an automatic transmission belongs to the technical field of automatic transmissions. A power takeoff driving gear structure is additionally arranged at the rear end of the driving chain wheel, a power takeoff driving gear of the driving chain wheel is in transmission connection with the power takeoff, and a needle bearing is radially additionally arranged between the driving chain wheel and the pump shell assembly. On the basis of an AT transmission and the principle of minimum variation, outward transmission of power is achieved through a newly designed oil pump driving chain wheel structure, a newly designed shell system is adopted, and two power takeoff mounting windows are additionally arranged on the two sides of a shell. The power takeoff is additionally arranged on the automatic transmission, the power takeoff is laterally arranged, the axial length of the transmission can be shortened, meanwhile, the power takeoff can be selectively arranged on any side according to the arrangement of the whole vehicle, and the space pressure of the whole vehicle is reduced. Two sets of power takeoff devices can be assembled on the two sides of the AT transmission at the same time, the two sets of power takeoff devices can work at the same time, and the requirement that multiple functions of a special vehicle can be carried out at the same time can be met.

Description

Technical Field

[0001] This utility model belongs to the field of automatic transmission technology, specifically relating to an automatic transmission with an added power take-off structure. Background Technology

[0002] With the rapid development of the automotive industry, the commercial vehicle sector has placed increasingly higher demands on driving and riding comfort. In particular, special vehicles such as cranes and sweepers used in specific professional fields have gradually evolved from only requiring the fulfillment of special functions to emphasizing both functionality and comfort.

[0003] To meet the comfort requirements of special vehicles, an automatic transmission can be selected. However, most automatic transmissions on the market do not have the ability to match a power take-off, and cannot transmit power other than driving the vehicle to the outside, thus failing to realize the lifting, sweeping and other functions of special vehicles. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, this utility model provides an automatic transmission with an added power take-off structure. Combining the mainstream power take-off arrangement in the industry, and in order to alleviate the space pressure of the whole vehicle, this utility model optimizes the development of the AT transmission by arranging the power take-off laterally, so as to meet the power take-off matching requirements of the AT transmission.

[0005] The technical solution adopted by this utility model is:

[0006] An automatic transmission with added power take-off (PTO) structure includes a transmission housing, a pump housing assembly, a front cover, a drive sprocket, a hydraulic torque converter, and an oil pump assembly. The drive sprocket is connected to the hydraulic torque converter, and the drive sprocket and the oil pump assembly are enclosed between the front cover and the pump housing assembly. The front spline of the drive sprocket and the oil pump assembly are connected via chain drive. A PTO drive gear structure is added to the rear end of the drive sprocket, and the PTO drive gear structure of the drive sprocket is driven by the PTO. A needle roller bearing is radially added between the drive sprocket and the pump housing assembly.

[0007] Compared with the prior art, the present invention has the following advantages:

[0008] Based on the AT transmission, this utility model achieves power transmission by redesigning the oil pump drive sprocket structure according to the principle of minimizing changes, and redesigns the housing system by adding two power take-off mounting windows on both sides of the housing.

[0009] This invention fulfills the need for adding a power take-off (PTO) to an automatic transmission. The PTO is arranged laterally, which can shorten the axial length of the transmission. At the same time, the PTO can be installed on either side of the vehicle according to the overall vehicle layout, reducing the space pressure of the vehicle.

[0010] This invention allows an automatic transmission to be equipped with two sets of power take-off units on both sides, and the two sets of power take-off units can work simultaneously, which can meet the needs of special vehicles to perform multiple functions at the same time. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the power take-off window structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the installation of the power take-off window of this utility model;

[0014] Figure 4 This is a schematic diagram of the active sprocket structure of this utility model;

[0015] Figure 5 This is a main sectional view of the drive sprocket of this utility model;

[0016] Figure 6 This is a left view of the power take-off window of this utility model;

[0017] Figure 7 This is a right view of the power take-off window of this utility model;

[0018] Figure 8 This is an isometric drawing of the power take-off cover plate of this utility model;

[0019] Figure 9 This is a main sectional view of the power take-off cover plate of this utility model;

[0020] The components include: 1. Transmission housing; 2. Anti-friction shim; 3. Pump housing assembly; 4. Input shaft assembly; 5. Reaction shaft; 6. Needle roller bearing; 7. Chain; 8. Front end cover; 9. Drive sprocket; 10. Hydraulic torque converter; 11. Thrust bearing; 12. Oil pump assembly; 13. Bolt; 14. Sealing gasket; 15. Power take-off cover plate; 16. Power take-off drive gear structure. Detailed Implementation

[0021] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model will be provided below with reference to the accompanying drawings.

[0022] The AT transmission oil pump system is located at the front of the transmission, between the hydraulic torque converter 10 and the planetary gear mechanism.

[0023] like Figure 1As shown, the oil pump system is connected to the hydraulic torque converter 10 via the drive sprocket 9. The drive sprocket 9 and the oil pump assembly 12 (driven sprocket) are enclosed between the front cover 8 and the pump housing assembly 3. The drive sprocket 9 and the oil pump assembly 12 are connected by a chain 7. Engine power is transmitted to the drive sprocket 9 via the hydraulic torque converter 10, and the drive sprocket 9 transmits the power to the oil pump assembly 12 via the chain 7, driving the oil pump assembly 12 to work.

[0024] like Figure 4 , Figure 5 As shown, a power take-off (PTO) drive gear structure 16 is added to the rear end of the drive sprocket 9, which meshes with the PTO input gear to transmit the power transmitted by the hydraulic torque converter 10 to both the PTO and the oil pump assembly 12.

[0025] like Figure 1 As shown, to meet the requirements of the power take-off (PTO), a needle roller bearing 6 is added radially between the drive sprocket 9 and the pump housing assembly 3. This reduces friction, transmits load, and supports the rotational motion of the drive sprocket 9. The hydraulic torque converter 10 is mounted on the rear end of the drive sprocket 9. The spline at the front end of the drive sprocket 9 is connected to the oil pump assembly 12 with the driven sprocket via a chain 7. The PTO drive gear structure 16 of the drive sprocket 9 is connected to the PTO drive gear.

[0026] Power is transmitted from the engine to the front spline of the drive sprocket 9 via the hydraulic torque converter 10. Part of the power is transmitted to the chain 7 through the drive chain teeth of the drive sprocket 9, thereby driving the oil pump assembly 12 to work; the other part of the power is transmitted directly to the power take-off via the power take-off drive gear structure 16 of the drive sprocket 9, so as to drive the power take-off to work.

[0027] The drive sprocket 9 has a pump housing assembly 3 on its left and right ends on its right, and a front cover 8 on its left. As the drive sprocket 9 moves, it generates an axial force in the direction of the front cover 8 (front end of the transmission). Therefore, a thrust bearing 11 is added between the drive sprocket 9 shaft and the front cover 8 to withstand the axial thrust load. To prevent the drive sprocket 9 from moving to the rear of the transmission under certain operating conditions and directly contacting the pump housing assembly 3 to generate friction, a friction-reducing shim 2 is added between the drive sprocket 9 and the pump housing assembly 3 to reduce friction.

[0028] The transmission housing 1, pump housing assembly 3, input shaft assembly 4, reaction shaft 5, and front cover 8 need to be adapted to the power take-off drive gear structure 16 added to the drive sprocket 9, and make axial and radial adaptive designs to ensure the movement space of the drive sprocket 9.

[0029] The pump housing assembly 3 is mounted on the reaction shaft 5, and the reaction shaft 5 is mounted on the input shaft assembly 4.

[0030] like Figure 2 , Figure 3As shown, to meet the installation requirements of the power take-off (PTO), the transmission housing 1 needs to be axially lengthened, and a PTO window needs to be added to each of the left and right sides of the transmission housing 1 (see details). Figure 6 , Figure 7 This allows for connection with the power take-off (PTO) and enables the PTO to be arranged laterally.

[0031] The new PTO cover plate 15 is designed according to the PTO window (see details). Figure 8 , Figure 9 When the power take-off (PTO) is not installed, the PTO window is sealed by the PTO cover plate 15. The PTO cover plate 15 can be directly installed on the PTO window of the transmission housing 1 by bolts 13, and a sealing gasket 14 is added between the PTO cover plate 15 and the PTO window to achieve a sealing effect; when the PTO is needed, the PTO cover plate 15 can be directly removed and the PTO can be replaced.

[0032] Both power take-off windows can be connected to the power take-off, and the power take-off drive gear structure 16 of the internal drive sprocket 9 can transmit power outward at both power take-off window positions. Therefore, this utility model can realize the function of matching power take-offs on either side or both sides of the transmission at the same time.

[0033] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An automatic transmission with added power take-off structure, comprising a transmission housing (1), a pump housing assembly (3), a front cover (8), a drive sprocket (9), a hydraulic torque converter (10), and an oil pump assembly (12); wherein the drive sprocket (9) is connected to the hydraulic torque converter (10), the drive sprocket (9) and the oil pump assembly (12) are enclosed between the front cover (8) and the pump housing assembly (3), and the front spline of the drive sprocket (9) and the oil pump assembly (12) are connected by a chain (7), characterized in that: A power take-off (PTO) active gear structure (16) is added to the rear end of the active sprocket (9). The PTO active gear structure (16) of the active sprocket (9) is connected to the PTO drive. A needle roller bearing (6) is added radially between the active sprocket (9) and the pump housing assembly (3).

2. The automatic transmission power take-off structure according to claim 1, characterized in that: A thrust bearing (11) is added between the drive sprocket (9) shaft and the front end cover (8) to withstand axial thrust load.

3. The automatic transmission power take-off structure according to claim 2, characterized in that: A wear-reducing shim (2) is added between the drive sprocket (9) and the pump housing assembly (3) to reduce wear.

4. The automatic transmission power take-off structure according to claim 1, characterized in that: A power take-off window is added to each of the left and right sides of the transmission housing (1) so that the power take-off is arranged laterally.

5. The automatic transmission power take-off structure according to claim 4, characterized in that: The power take-off window is sealed by the power take-off cover plate (15).

6. The automatic transmission power take-off structure according to claim 5, characterized in that: A sealing gasket (14) is provided between the power take-off cover plate (15) and the power take-off window.

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