Shock-resistant cranking motor for automobile

Abstract

The invention discloses a shock-resistant cranking motor for an automobile. A gear base (7) is installed at the rear end of a reducer output shaft (6) in a sleeved mode. An internal gear (8) and a cover plate (9) are arranged on the back of the gear base (7). The internal gear (8) and a planetary gear (10) in the internal gear (8) are meshed. The periphery of the internal gear (8) is provided with a plurality of vibration reduction blocks (11) uniformly distributed along the circumference. The inner surfaces of the vibration reduction blocks (11) are closely attached to the outer circumferential face of the internal gear (8). The outer surfaces of the vibration reduction blocks (11) are attached to the inner wall of the case (1). The front end faces of the vibration reduction blocks (11) are attached to the gear base (7), and the rear end faces of the vibration reduction blocks (11) are attached to the cover plate (9). The shock-resistant cranking motor can effectively absorb the impact load of an engine, on one hand, failure of rotation stressing parts of a cranking motor is avoided, and the reliability of the cranking motor is ensured; on the other hand, the cranking motor works and operates stably, vibration is small, the work noise is lowered, and the use comfort of products is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to an anti-shock starter motor for automobiles. Background technique [0002] The starter motor is an important part of the car. Its function is to start the car engine, and the starter motor outputs power to make the engine run from a standstill. [0003] The basic working principle of the automobile starter motor is that the battery supplies a large current to the starter motor. The starter motor converts electrical energy into mechanical energy. The one-way clutch of the starter motor drives the flywheel of the engine to rotate until the engine is ignited and runs normally. The one-way device withdraws under the action of the shift fork and returns to the initial position. [0004] The engine torque is relatively large. Taking a 1.5L gasoline engine as an example, the frictional resistance torque at room temperature at 20°C is about 35N.m; at low temperature at -30°C,...

AI Technical Summary

Problems solved by technology

[0005] In the existing structure, the internal gear at the rear end of the internal reducer assembly of the starter motor is generally fixed by hard positioning. When the starter motor starts the engine, the impact force of the engine will be directly loaded on the internal gear. It will affect the stability of the starter motor, increase the vibration and noise of the starter motor, and reduce the comfort of the product; on the other hand, to obtain a large reduction ratio, the internal gear can only use a small module of plastic material Tooth, the small modulus gear is limited by its own structure, and the load it can bear is limited. When the engine operating condition is poor, it is easy to cause the teeth of the internal gear to break because they cannot bear the impact load, which will cause the starter motor to fail and the engine cannot be started.

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