Electrical Rotary Connector

Abstract

The invention relates to an electric rotary connector which comprises an outer housing, a rotary connector and an external connector, wherein the rotary connector comprises a rotary shaft; an axis of the rotary shaft stretches in front and rear directions; the external connector is connected with the rotary shaft by a synchronous transmission structure in a transmission manner; an encoder mandrel of an encoder is fixedly arranged on the outer housing; an encoder housing of the encoder is connected with the rotary shaft in a synchronous transmission manner; and an encoder outgoing line end on the encoder housing is connected with the external connector by a lead. According to the electric rotary connector, an outgoing line of the encoder is not required to pass through the rotary connector.

Description

Technical field [0001] The present invention relates to an electric rotary connector for electric signal transmission. Background technique [0002] In order to realize the transmission of electrical signals between two relatively rotating components, an electrical rotary connector is required. The structure of the existing electric rotary connector is as figure 1 Shown: It includes an outer housing 3, an encoder, a rotary connector, and an external connector 13. The rotary connector includes a rotating shaft 4 with an axis extending in the front-to-rear direction. A plurality of conductive rings are arranged on the rotating shaft at intervals along the axial direction. The encoder also includes brushes that respectively contact and frictionally conduct electricity with each conductive ring. The brushes are fixed on the outer shell, and the external connector is fixed at the front end of the rotating shaft. The encoder includes an encoder shaft 15 and rotates with the encoder sha...

AI Technical Summary

Problems solved by technology

The encoder is used to detect the rotation angle of the rotary connector. The problem with the existing electric rotary connector is that, since the encoder housing rotates relative to the external connector, in order to avoid winding, the wire 1 drawn out from the outlet end of the encoder It must be welded and fixed on the brush, and then the signal can be output through the external connector after passing through the conductive ring, which leads to a poor shielding effect on the encoder, because the wire needs to be stripped before it can be welded to the brush, and the connection between the wire and the brush The shielding at the welding position, the brush position and the conductive ring position are very difficult to handle, which makes the encoder vulnerable to external interference, because the external motor, the welding machine start and the surrounding power lines will all affect these difficult shielding positions. As the encoder is a precision component, small interference may cause the waveform of the encoder to be inaccurate, and it is difficult to measure the accurate output angle of the rotary connector

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