低速重载纵置变速器

Abstract

本实用新型涉及机动车变速器的技术领域，公开了一种低速重载纵置变速器，可以应用于汽车，在使用过程中，驾驶员可以通过第一离合器、第二离合器、第三离合器、第四离合器和制动器的分别结合和分离，配合第一行星排组件、第二行星排组件、第三行星排组件、第四行星排组件，实现多个前进挡和一个倒挡的切换。并通过结合设置第四离合器，实现第三行星排的锁死，并且通过第一离合器实现第一太阳轮和第二转轴的分离和结合，能够使第一离合器和第四离合器处结合后扭矩较小，解决现有技术中的离合器结合处的扭矩较大，容易造成变速器损坏的技术问题，达到了第一离合器和第四离合器处扭矩较小，避免变速器损坏的技术效果。

Claims

1. A low speed heavy duty longitudinal transmission, characterized in that, include: Housing, input shaft, output shaft, first planetary gear assembly, second planetary gear assembly, third planetary gear assembly, fourth planetary gear assembly, brake, first clutch, second clutch, third clutch and fourth clutch; The first planetary gear set includes a first sun gear, a first planetary gear, a first planet carrier, and a first ring gear; the second planetary gear set includes a second sun gear, a second planetary gear, a second planet carrier, and a second ring gear; the third planetary gear set includes a third sun gear, a third planetary gear, a third planet carrier, and a third ring gear; the fourth planetary gear set includes a fourth sun gear, a fourth planetary gear, a fourth planet carrier, and a fourth ring gear. The input shaft is connected to the second clutch and the second planetary carrier, respectively. The brake is fixedly installed on the inner wall of the housing, and the brake is connected to the first sun gear and the second sun gear respectively through the first rotating shaft; The first planetary carrier is connected to the fourth gear ring via the second rotating shaft. The first gear ring is fixedly disposed on the inner wall of the housing. The first sun gear is connected to the first rotating shaft via the first clutch. The second gear ring is connected to the third sun gear via a third rotating shaft; The third gear ring is connected to the second clutch via the sixth rotating shaft; The third planetary carrier is connected to the third clutch via a fourth rotating shaft; The third sun gear is connected to the fourth clutch via the eighth shaft, and the fourth clutch is connected to the third planet carrier via the fifth shaft; The fourth sun gear is connected to the sixth shaft, the fourth planetary carrier is connected to the third clutch via the seventh shaft, and the output shaft is connected to the fourth planetary carrier via a transmission connection.

2. The low speed, heavy duty, longitudinal transmission of claim 1, wherein, The output shaft is connected to the seventh shaft mounted on the fourth planetary carrier.

3. The low speed, heavy duty, longitudinal shift transmission of claim 1, wherein, The fourth clutch is disposed on the side of the third planetary gear assembly closer to the fourth planetary gear assembly, and the fourth shaft is connected to the side of the third planetary gear assembly away from the fourth planetary gear assembly.

4. The low speed, heavy duty, longitudinal shift transmission of claim 1, wherein, The input shaft and the output shaft are coaxially arranged.

5. The low speed, heavy duty, longitudinal transmission of claim 4, wherein, The first planetary gear set, the second planetary gear set, the third planetary gear set, and the fourth planetary gear set are arranged sequentially along the axial direction of the output shaft.

6. The low-speed, heavy-duty longitudinally mounted transmission according to claim 1, characterized in that, It also includes a hydraulic assembly connected to the brake, the first clutch, the second clutch, the third clutch and the fourth clutch respectively, the hydraulic assembly being used to provide oil pressure to the brake, the first clutch, the second clutch, the third clutch and the fourth clutch.

7. The low speed, heavy duty, longitudinal transmission of claim 6 wherein, The low-speed, heavy-duty longitudinal transmission includes eight forward gears and one reverse gear: The first forward gear is achieved by closing the brake, the first clutch, and the second clutch; The second forward gear is achieved by closing the brake, the first clutch, and the fourth clutch; The third forward gear is achieved by engaging the first clutch, the second clutch, and the fourth clutch; The fourth forward gear is achieved by engaging the first clutch, the third clutch, and the fourth clutch; The fifth forward gear is achieved by engaging the first clutch, the second clutch, and the third clutch; The sixth forward gear is achieved by engaging the second clutch, the third clutch, and the fourth clutch; The seventh forward gear is achieved by closing the brake, the second clutch, and the third clutch; The eighth forward gear is achieved by closing the brake, the third clutch, and the fourth clutch; Reverse gear is achieved by closing the brake, the first clutch, and the third clutch.

8. The low speed, heavy duty, longitudinal shift transmission of claim 1, wherein, It also includes a hydraulic torque converter disposed within the housing, one end of which is connected to the engine and the other end of which is connected to the input shaft.

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