A toothless drive screw with adjustable shaft axis position and drive friction

Abstract

The invention discloses a no-tooth transmission lead screw with adjustable polish rod axis positions and transmission friction force. The no-tooth transmission lead screw with the adjustable polish rod axis positions and the transmission friction force comprises a displacement block, a displacement platform, a polish rod, a friction drive pair, an adjusting screw group and a jacking bolt group, wherein the displacement platform is connected with the displacement block, the polish rod penetrates through an inner cavity of the displacement block, the friction drive pair is installed on the polish rod and is composed of a bearing group and a wedge block group, the adjusting screw group is pushed upwards to the bearing group and used for adjusting the positions of a polish rod axis, and the jacking bolt group is used for adjusting the friction force, locking and loosening the drive pair. Fast centering of the polish rod is easily achieved, and motion stability is good by adjusting of the adjusting screw group. By means of adjusting of the jacking bolt group, the transmission friction force can be adjusted, locking and releasing of the polish rod can be achieved, the displacement platform is enabled to do precise fine motions and fast motions, and changing over of the motions is simple, convenient and fast. The no-tooth lead screw is small in abrasion, strong in loading capacity, easy to machine, convenient to assemble, stable in quality and low in cost by adopting of symmetric design and standard parts. The no-tooth lead screw can be applied to a machine tool, a coordinate measuring machine and an image measurement device to drive the displacement platform to do fine displacement motions.

Description

technical field [0001] The invention relates to a friction transmission mechanism for transformation between rotation and linear motion, which is used for precision displacement transmission of translation tables of machine tools, coordinate measuring machines and video measuring machines, and is specifically a toothless transmission screw with adjustable axis position and transmission friction of a polished rod. Background technique [0002] At present, in the known technology, there is a friction transmission mechanism similar to a toothless screw <also called a toothless guide rod, a toothless screw, a toothless smooth rod, a toothless screw, and a linear slewing bearing>. The friction transmission pair is composed of a displacement block , polished rod, bearing group, and wedge group and other components; with the help of the polished rod and the friction mechanism to squeeze and contact, generate left and right rotation and axial friction thrust, and convert the ro...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a toothless transmission screw with adjustable shaft position and transmission friction force, so as to solve the problem of inability to fine-tune the axis position of the polished rod in the application of the prior art toothless screw, difficulty in adjusting the friction force, and difficulty in manufacturing. high cost problem

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