Vehicle's steering wheel rotation angle sensing device

Abstract

The invention relates to a vehicle steering wheel angle detection device, which comprises: a rotor connected to a steering shaft capable of transmitting an operating force to the wheels and rotating; a main gear fixed on the rotor and integrated into one body and rotating; a first The rotating gear and the second rotating gear rotate together with the above-mentioned main gear; the first magnetic body and the second magnetic body are in the shape of a hexahedron and the area of ​​the top surface is larger than the area of ​​the bottom surface as the opposite surface, and are respectively fixed on the above-mentioned first magnetic body. The first rotating gear and the second rotating gear rotate according to the same rotation ratio as the first rotating gear and the second rotating gear; the first detecting part and the second detecting part can respectively detect and the phase change of polarity (N pole, S pole) caused by the rotational movement of the second magnetic body; the PCB substrate has various terminals and pins, including the above-mentioned first detection part and second detection part; and the casing.

Description

technical field [0001] The invention relates to a vehicle steering wheel angle detection device. The vertical section of the magnetic body combined with the rotating gear is trapezoidal in shape and can prevent the magnetic body from swimming in the vertical direction, and the tooth crown of the main gear is consistent with the first rotation When the dedendums of the gears mesh, the tooth crowns of the second rotating gear mesh with the dedendums of the main gear and rotate, thereby reducing the backlash phenomenon of the gears. Background technique [0002] Generally speaking, the steering device necessary for a car is a conversion device that can change the route and direction of the car according to the driver's idea. It basically includes the following units: the steering wheel (Steering wheel) operated by the driver; A steering shaft (Steering shaft) for transmitting an operating force; and a steering wheel angle detection device mounted on the steering shaft and capab...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned bonding method will reduce the adhesive force of the above-mentioned adhesive and cause the above-mentioned magnetic body to break away from the above-mentioned rotating gear when the magnetic body rotates for a long time, and an additional bonding process is required during the processing to increase the processing time and Cost of production

[0006] When the above-mentioned plurality of rotating gears of the conventional vehicle steering wheel angle detection device mesh with each other and rotate in one direction, although the tooth crowns of the above-mentioned plurality of rotating gears are in contact with each other, the tooth crowns of the rotating gear on one side are in contact with the tooth crowns of the rotating gear on the other side. There will be a gap between the tooth grooves, and the gear needs to be rotated by the corresponding angle of the gap, so the backlash phenomenon that the power cannot be accurately transmitted to the gear appears.

[0007] The above backlash phenomenon affects the accuracy of angle detection

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