Screw type worm screw and worm strip transmission mechanism

Abstract

The invention discloses a screw-type worm and worm strip actuating mechanism, which is characterized by the following: comprising bench, worm strip, casing, base, worm, butterfly spring, axle, coupler and motor; storing fluid oil in the housing; fixed-connecting with base with screw and pin; nesting two worm on inner axle in the housing; arranging butterfly spring between the two worms; floating at axial position of the axle with the worm and the butterfly spring; auto-adjusting back lash between the worm and the worm strip with the butterfly; connecting the right end of the axle to the motor through the coupler; setting the worm strip as more piece set rule strip component; setting the light flat of the worm strip toward upper; applying with the bottom face of bench; connecting with the screw and pin; contacting the face with screwed tooth with the worm. This invention possesses high accuracy without noise, which is fit for actuator.

Description

technical field [0001] The invention relates to a mechanical transmission mechanism, in particular, the invention relates to a worm transmission mechanism. Background technique [0002] Gantry lathes and gantry milling machines are large-scale equipment that realize mechanical cutting with the reciprocating linear motion of the worktable. The workbench transmission mechanism of this kind of machinery usually uses a cylindrical gear and a rack to form a low-speed heavy-duty motion pair. The cylindrical gear performs fixed-point rotary motion, and the rack is driven by the cylindrical gear to perform horizontal and linear motion. Although the transmission mechanism in the prior art is simple, it can effectively drive the workbench to perform horizontal reciprocating linear motion. However, when the cylindrical gear meshes with the straight rack, only 2 to 3 teeth mesh sequentially, and the torque transmitted by the transmission mechanism is borne by the meshing teeth. Since t...

AI Technical Summary

Problems solved by technology

However, when the cylindrical gear meshes with the straight rack, only 2 to 3 teeth mesh sequentially, and the torque transmitted by the transmission mechanism is borne by the meshing teeth. Since the load is relatively concentrated on the meshing tooth surface, the teeth It is difficult to establish a lubricating oil film between the surfaces, and the tooth surface is prone to pitting, abrasion or gluing damage under heavy loads, and even tooth breakage accidents

The shortcomings of the transmission mechanism composed of cylindrical gears and racks in the prior art directly affect the transmission accuracy, vibration, noise, load characteristics and work reliability of gantry milling machines and gantry milling machines

In addition, the worm drive of the prior art is used to transmit the motion and torque between the two shafts interlaced in space. Due to the large length space and small width space under the working table of the gantry milling machine and the gantry milling machine, it is not suitable to use the worm drive of the prior art. Worm drive

Images