Split type photoelectric encoder

Abstract

The invention relates to a split type photoelectric encoder which comprises a circuit board, a rotating shaft, a code disc, a base and a fixing assembly. The fixing assembly comprises a fixed ring, awedge-shaped supporting block and a rotor, wherein the fixed ring, the wedge-shaped supporting block and the rotor are sleeved in the base. The fixed ring can drive the rotor to rotate on the base sothat the rotor is supported by the wedge-shaped supporting block on the base and the height is changed. When the rotor is at a highest position, the rotor abuts against the lower surface of the rotating shaft, thereby ensuring an air gap between photoelectric converting chips on the code disc and the circuit board. Through a locking device, the rotating shaft of a motor is fixed to the rotating shaft of the photoelectric encoder. Then the rotor is rotated to a lowest position for realizing normal operation. The split type photoelectric encoder can ensure field safe and simple mounting, and ensures an air gap between the code disc and the photoelectric converting chip on the circuit board. Compared with an integrated coder, the split type photoelectric encoder has advantages of small size and height reduction for about 15mm. The split type photoelectric encoder better satisfies the requirement for servo equipment miniaturization, and the encoder body is made of a plastic material. Furthermore a pair of bearings is saved, and the product cost is reduced by about 30%.

Description

technical field [0001] The invention relates to the technical field of electronic measurement, in particular to a split photoelectric encoder. Background technique [0002] Photoelectric encoder is a sensor that converts the mechanical geometric displacement of the output shaft into pulse or digital quantity through photoelectric conversion. It is mainly used in various numerical control equipment and is the most widely used sensor at present. Photoelectric encoder is mainly composed of code Composed of a disc and a photoelectric detection device, in the servo system, the code disc and the motor are coaxial so that the rotation of the motor drives the rotation of the code disc, and then a number of pulse signals are output through the photoelectric detection device, which can be calculated according to the number of pulses per second of the signal The current speed of the motor. One of the core problems of the incremental photoelectric encoder is to accurately ensure the ai...

AI Technical Summary

Problems solved by technology

One of the core problems of the incremental photoelectric encoder is to accurately ensure the air gap between the code disc and the photoelectric conversion chip on the circuit board. The integrated photoelectric encoder is the mainstream product in the servo market at present. For the integrated encoder However, due to the existence of upper and lower bearings, the size of the shafting system is easy to be fixed, but it has defects such as large volume and high cost

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