Gear drive mechanism in wing mirror reverse of automobile

Abstract

The present invention discloses a gear drive mechanism in the wing mirror reverse of an automobile. The gear drive mechanism comprises a plurality of planetary gears (2), a sun gear rod (3), a gear box upper cover (1) and a gear box lower cover (4). Both the gear box upper cover (1) and the gear box lower cover (4) are provided with internal tooth rings. The tooth number of the internal tooth ring of the gear box upper cover (1) is 41, the tooth number of all planetary gears (21) on the upper layer is 17, the tooth number of all planetary gears (22) on the lower layer is 18, the tooth number of the internal tooth ring of the gear box lower cover (4) is 42, and the tooth number of the sun gear rod (3) is 6. The adoption of the structure can meet the low rotating speed requirement for electromotors, thereby making noise low. Meanwhile, the requirement of electromotor running for small torsion is met, and the trouble that the parts in the electromotors are redesigned is avoided.

Description

technical field [0001] The invention relates to the field of vehicle accessories, in particular to a gear transmission mechanism in an automobile rearview mirror reversing device. Background technique [0002] The car rearview mirror is an auto accessory for the driver to observe the running status of the rear vehicles and pedestrians while driving the car. It is a necessary guarantee for safe driving. By adjusting the installation angle of the rearview mirror, the driver can observe Wide field of vision for safe driving. There are currently many solutions for how to adjust the rotation of the lens, including a fixed rearview mirror that fixes the mirror surface and the frame; Mirrored rearview mirrors; there are also rearview mirrors controlled by electric motor drives. In order to achieve the electric automation of the car, the last way is the most commonly used. This electric car rearview mirror reversing device generally includes an electric motor, a gear transmission...

AI Technical Summary

Problems solved by technology

[0004] Since the output speed of the motor is fixed, for the gear transmission mechanism of the first two reduction ratios, the required speed of the motor is fast, which will cause the motor to generate a lot of noise during operation. Relatively speaking, the first reduction ratio The motor will be louder than the motor with the second reduction ratio; for the gear transmission mechanism with the third reduction ratio, although the required speed of the motor is slower, it solves the disadvantage of high noise during the operation of the motor, but the motor in this case The required torque is large, so the parts of the internal structure of the motor must be redesigned and changed. Since the space inside the motor is certain, the design of the internal parts of the motor becomes very troublesome.

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