Axial load resistant no-return-difference torque output ball-hinged driving mechanism

Abstract

The invention discloses an axial load resistant no-return-difference torque output ball-hinged driving mechanism, comprising a driving unit, a transmission unit and an aligning unit; a servo direct current motor is arranged on a motor mounting seat and is connected with a motor shaft coupling block so as to form the driving unit; an output shaft, a criss-cross sliding block and the motor shaft coupling block are coupled by a longitudinal slot and a horizontal slot so as to form the transmission unit; a pressure side ring is used for fastening a ball-hinged joint outer ring in a mounting hole of the motor mounting seat and a ball-hinged joint inner ring and the ball-hinged joint outer ring are mutually matched to realize the aligning function; a bearing outer baffle ring is used for pressing two angular contact ball bearings in a bearing mounting hole of a ball-hinged joint; and the output shaft and the angular contact ball bearing are locked by fastening nuts, thus forming the aligning unit together. The axial load resistant no-return-difference torque output ball-hinged driving mechanism adopts the ball-hinged joint to realize axial load characteristic, simultaneously uses the floating criss-cross sliding block to transfer torque, overcomes return difference of the servo direct current motor when switching by forward and reverse rotation, and compensates the radial and axial errors caused by deflection of the output shaft.

Description

technical field [0001] The present invention relates to a ball joint driving mechanism, more particularly, a ball joint driving mechanism with anti-axial load and non-backlash torque output. Background technique [0002] The torque output spherical hinge drive mechanism is a form of a rotary drive mechanism with an adjustable output shaft angle. When the mechanism outputs torque, the angle of the output shaft can be adjusted to adapt to changes in the posture and position of the rear transmission mechanism, and can be used in the fields of robots, micro-manipulation, medical equipment, and scientific research instruments. [0003] The traditional torque output spherical joint drive mechanism mainly uses a cross cardan coupling or an elastic coupling to connect with the output shaft to realize the functions of torque output and passive swing around the center of the ball. The realization of this kind of mechanism adopts standard devices, which has the advantages of simple an...

AI Technical Summary

Problems solved by technology

[0004] 1) poor axial load resistance

If an elastic coupling is used as a transitional joint, the axial length dimension will change; while a cross universal coupling is used, the coupling pin bearing of the coupling is subject to axial and radial alternating loads, which is easy to wear and deform, resulting in Transmission clearance is large

[0005] 2) The rotation difference is large

If an elastic coupling is used as a transitional coupling, there is a certain phase difference between the output shaft and the input shaft; while using a cross universal coupling, the wear of the cross pin will quickly affect the rotation accuracy, so that there is a Rest zone, impact on the ball joint drive

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