Automatic Belt Tensioner for Electric Vehicles

Abstract

An automatic belt tensioning device for an electric vehicle, comprising a tensioning belt, a pulley shaft, a tensioning pulley, a pressure sensor, a main controller, a bearing, a pressure plate, a spring, a tensioning bracket, a tensioning motor, a worm, a worm wheel, and a magnetic ring , sensor, fixed frame, bracket shaft and motor driver; the bracket shaft is fixedly connected with the fixed frame; the tensioning bracket is rotatably connected to the bracket shaft; the worm gear is fixedly connected to the tensioning bracket; the worm is connected with the tensioning motor and the worm gear transmission; the magnetic ring Fixedly connected to the output shaft of the tensioning motor; the sensor is fixedly connected to the body of the tensioning motor; the pulley shaft is fixedly connected to the tensioning bracket and has a radial slide groove; the bearing is sleeved on the outer circumference of the pulley shaft; the spring and pressure The sensors are all arranged in the radial chute; the tension pulley is set on the outer periphery of the bearing; the pressure sensor, the motor driver and the sensor are all electrically connected with the main controller. The invention can realize the automatic tensioning of the tensioning belt after it is loosened, and the automatic control of the magnitude of the tensioning force.

Description

technical field [0001] The invention relates to an electric vehicle, in particular to an automatic belt tensioner for the electric vehicle. Background technique [0002] An electric vehicle is a complex product, involving multiple systems such as heat dissipation, steering, braking, and pneumatics, and these systems all need power sources to drive. For example, the heat dissipation system needs to be powered by a cooling water pump; the steering system needs to be driven by a steering oil pump As a power source; the pneumatic system requires an air compressor as a power source. Integrating these power sources and uniformly controlling them can save the layout space of the chassis and save costs. Electric vehicles of the prior art generally provide power for these power sources by drive motors, such as Figure 8 As shown, the cooling water pump, the steering oil pump and the air compressor are driven to rotate synchronously by the driving motor through the tension belt 51 . ...

AI Technical Summary

Problems solved by technology

As an important part of energy transmission, the normal operation of the tension belt 51 plays a vital role in the power transmission process, and the important factor affecting the transmission efficiency of the tension belt 51 is the tension force. When the tension belt When the tension force of the tension belt 51 is insufficient, the ability to transmit the load is low, the efficiency is low, and the pulley will heat up rapidly, and the belt will be worn; when the tension force of the tension belt 51 is too large, the life of the tension belt 51 will be reduced , the load on the shaft and bearing increases, and the bearing heats up and wears. Therefore, proper tension is an important factor to ensure the normal operation of the tension belt 51 drive

The belt tensioning device of the electric vehicle of the prior art cannot automatically tension after the tension belt 51 is loosened, and the tension force cannot be automatically controlled, so that the tension force is insufficient or the tension force is too large, thereby Affects the transmission efficiency of the tension belt 51

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