Two-gear pure electric vehicle transmission gear shifting mechanism and shifting mechanism method

Abstract

The invention discloses a two-gear pure electric vehicle transmission gear shifting mechanism and a shifting mechanism method. During gear shifting, a motor on a motor worm assembly drives a worm of the motor worm assembly to rotate, and the worm is engaged with a turbine of a torsion shock absorber assembly; and the turbine rotates to drive a straight gear on the torsion shock absorber assembly to rotate, the straight gear is engaged with a shifting fork rod rack on a shifting fork assembly, a shifting fork rod is driven to move in the axial direction, and accordingly, a shifting fork is driven to move in the axial direction to achieve gear shifting. Compared with the prior art, a transmitting swing rod assembly is omitted, the purchase cost and the assembling cost are reduced, meanwhile,a power transmit chain during gear shifting is shortened, the power efficiency is higher compared with that of a traditional mechanism, dynamic response is quick, and gear shifting setback of a wholevehicle is reduced.

Description

technical field [0001] The invention relates to a pure electric vehicle transmission, in particular to a shifting mechanism and a shifting method of a two-speed pure electric vehicle transmission. Background technique [0002] The shift mechanism of the two-speed pure electric vehicle transmission of the prior art is as follows: figure 1 shown. The shift mechanism of the two-speed pure electric vehicle transmission includes a motor worm assembly, a torsional shock absorber assembly, a transmission swing rod assembly and a shift fork assembly. When shifting gears, the motor 11 on the motor worm assembly starts to drive its worm 13 to rotate, and the worm 13 cooperates with the turbine 21 on the torsional shock absorber assembly to transmit power, and then the spur gear on the torsional shock absorber assembly 2 24 cooperates with the sector gear 411 on the sector gear 41 on the transmission pendulum assembly 4, and then the finger 421 on the transmission pendulum assembly 4...

AI Technical Summary

Problems solved by technology

[0003] The two-speed pure electric vehicle transmission in the prior art has a large number of parts, the power transmission chain is long when shifting gears, and the total clearance of the mechanism is relatively large, so there are the following defects:

[0004] 1) The number of parts is large, and the manufacturing cost and assembly cost are high;

[0005] 2) The power response is delayed, which affects the comfort of the vehicle when shifting and stopping;

[0006] 3) Occupying the internal space of the transmission case, it is impossible to reduce the weight and size of the transmission;

[0007] 4) The total gap of the mechanism is large, and the sensor feedback is not accurate, which may easily cause problems such as gear-off and gear-hitting

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