The drive shaft of the OEM speedometer is driven by a transmission or transfer case drive gear via a flexible shaft. The OEM speedometer consists of a permanent magnet fastened to the driving shaft, an aluminium bowl with shaft and pointer, a cover and a dial fastened to the case. When not in operation, the aluminum bowl keeps the pointer at the zero position of the scale under the action of the disc spring (hairspring).
When driving, the driving shaft rotates with the permanent magnet, and the magnetic field lines of the permanent magnet generate eddy currents on the aluminum bowl, and the eddy currents interact with the magnetic field of the permanent magnets to generate torque to overcome the elastic force of the disc spring, so that the aluminum bowl is deflected in the direction of the rotation of the permanent magnets. , so the aluminum bowl turns an angle with the pointer. Since the strength of the eddy current is proportional to the speed of the vehicle, the rotation angle of the pointer is proportional to the speed of the vehicle, and the pointer indicates the corresponding speed on the dial.
Taizhou Yongchang Electric Vehicle Manufacturing Co., Ltd. not only has OEM speedometer, but also other products such as speedometer manufacturer. Welcome to check our official website.
