Two-gear gearbox of electric vehicle

Abstract

The invention discloses a two-gear gearbox of an electric vehicle. The two-gear gearbox comprises a driving mechanism, a speed reducing mechanism, a gear shifting mechanism, a gear selecting mechanism, a gear shifting actuating mechanism and a control module, wherein the gear shifting mechanism comprises a gear selecting spline (14), a gear shifting shaft (5), a high-speed gear (6) and a low-speed gear (8); the gear selecting mechanism comprises a gear selecting shift fork (15), a gear selecting pull rod (16), a gear selecting gear (17), a gear selecting assembly (18), a gear position cam (19) and a gear propping spring (25). The two-gear gearbox disclosed by the invention adopts electric gear shifting to replace manual gear shifting, so that the gear shifting is convenient.

Description

technical field [0001] The utility model relates to a two-speed transmission applicable to electric vehicles, which belongs to the technical field of variable speed drive and transmission of electric vehicles. Background technique [0002] In order to make the motor work in the high-efficiency zone as much as possible, the application of electric vehicles equipped with transmissions is increasing. But the field of electric vehicles such as existing electric tricycle, electric vehicle, adopts hand-pulled gear shifting device more. This will cause several problems: [0003] 1. The existing hand-pull gear shifting device for electric vehicles has no synchronous action during the shifting process, which will cause problems such as tooth hitting, impact, jerk, noise, etc. during the shifting process, and may easily cause damage to the gear or gearbox. [0004] 2. In the existing hand-pull shifting device for electric vehicles, the shifting actuator is composed of pull wires, sp...

AI Technical Summary

Problems solved by technology

[0003] 1. The existing hand-pull shifting device for electric vehicles has no synchronous action during the shifting process, which will cause problems such as tooth hitting, impact, frustration, noise, etc. during the shifting process, and may easily cause damage to the gear or gearbox

[0004] 2. In the existing hand-pull gearshift device for electric vehicles, the gearshift actuator is composed of pull wires, springs and other mechanisms, and it is impossible to judge whether the gearshift is in place. Over time, it will lead to aging or loosening of purely mechanical mechanisms such as pull wires and springs. Causing disengagement or inability to shift gears during driving

[0005] 3. The existing hand-pull gear shifting device for electric vehicles requires the help of a strong spring to lock the gear. During the driving process, it is easy to fail to engage the gear, or miss the timing of shifting when going uphill.

[0006] 4. The existing hand-pull gear shifting device for electric vehicles does not have a clutch device, so power interruption or power connection cannot be achieved during the gear shifting process

Therefore, in the process of manual operation, more manual force is required, which will undoubtedly affect the handling performance and driving experience of the vehicle

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