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Wet clutch applied to pure electric multi-gear gearbox

A wet clutch and transmission technology, applied in the field of clutches, to achieve the effect of facilitating the selection of oil pumps, improving stability and reliability, and compact design space

Pending Publication Date: 2022-07-29
BORGWARNER UNITED TRANSMISSION SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently no clutch suitable for multi-speed electric drive transmissions on the market, so a wet clutch for pure electric multi-speed transmissions is proposed

Method used

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  • Wet clutch applied to pure electric multi-gear gearbox
  • Wet clutch applied to pure electric multi-gear gearbox
  • Wet clutch applied to pure electric multi-gear gearbox

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Refer to the manual attached Figure 1-3 ( image 3 The solid line arrow is the clutch pressure oil circuit; the black hollow arrow is the clutch lubricating oil circuit), a wet clutch applied to a pure electric multi-speed gearbox in this embodiment includes a gearbox shaft 1, the There is an output hub 3 on it, and the transmission shaft 1 and the output hub 3 are movably connected through the cooperation of splines and internal splines, so as to facilitate the transmission of torque between the transmission shaft 1 and the output hub 3. There is an O-ring groove on the 1, and two O-rings 2 are installed in the O-ring groove. The two O-rings 2 are radially installed between the gearbox shaft 1 and the output hub 3 to prevent the pressure oil passage. The oil leaks and can maintain the pressure in the pressure chamber of the clutch.

[0031] The top of the output hub 3 is provided with a piston housing 4 and an action piston 5, the action piston 5 is arranged on the ...

Embodiment 2

[0048] Refer to the manual attached Figure 4 , in the embodiment 1, the action piston 5 is designed in one piece. Considering the stamping process of the parts, it needs to occupy a large radial space. Therefore, the difference between this embodiment and the embodiment 1 is that the action piston 5 adopts a two-stage type, which can Further reduction of the overall diameter of the clutch.

[0049] The difference between this embodiment and the first embodiment is that the top of the outer casing 9 is provided with a clamp 20, which makes the outer casing 9 more stable when rotating at a high speed, and can still run stably at a very high rotational speed.

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Abstract

The invention discloses a wet clutch applied to a pure electric multi-gear gearbox, and particularly relates to the technical field of clutches, the wet clutch comprises a gearbox shaft, an output hub is arranged on the gearbox shaft, a piston shell and an acting piston are arranged at the top end of the output hub, and the acting piston is arranged on the right side of the piston shell; the output hub is fixedly connected with the piston shell, the acting piston axially reciprocates on a piston running face at the top end of the output hub, a spring plate is arranged on the right side of the acting piston, one end of the spring plate is fixedly connected with the right side of the acting piston, a return piston is fixedly arranged at the other end of the spring plate, and the inner shell is arranged on the right side of the return piston. The return piston is pressed on the left side of the inner shell through the elastic force of the spring disc, and the inner shell is fixedly connected to the top end of the output hub. The clutch is suitable for a two-gear or multi-gear electric drive gearbox, the design space is compact, the heat capacity is good, and the system stability is high.

Description

technical field [0001] The invention relates to the technical field of clutches, in particular to a wet clutch applied to a pure electric multi-speed gearbox. Background technique [0002] Traditional electric drive systems are single-speed gearboxes, which require higher motor performance such as speed and torque. For long cruising range, larger-capacity batteries are often required, and the system speed is too high, which affects the NVH performance of the vehicle. Therefore, the development of two-speed or multi-speed electric drive transmission is imminent. The core element in the above gearbox is the clutch. The electric drive gearbox has extremely high requirements on the design of the clutch, which needs to transmit a large torque, and requires a compact space, and the axial length and radial dimensions are limited within a small space; and the clutch is required to respond quickly, in milliseconds. Interruption and combination of torque are achieved. At present, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D25/0638F16D25/12
CPCF16D25/0638F16D25/12F16D25/123
Inventor 李军均
Owner BORGWARNER UNITED TRANSMISSION SYST