Precision worm gear-worm speed reducer

Abstract

The invention relates to a precision worm gear-worm speed reducer which comprises a box body, an end cover, an input flange and a close cover, wherein the input flange and the close cover are respectively fixed on two sides of the box body, a dual-lead worm gear pair is arranged in the box body, wherein a dual-lead worm is externally connected with an input shaft, two ends of the dual-lead worm are supported in the box body through a bearing, a worm gear is in transmission with an output shaft sleeve, and automatic adjusting springs are respectively arranged between the bearing at the back end of the dual-lead worm and the end cover, and between the bearing at the front end of the dual-lead worm and the input flange. The precision worm gear-worm speed reducer can overcome the defects that the radial adjustment quantity of the worm gear pair of the ordinary worm gear-worm speed reducer in the prior art is difficult to grasp, the axial line of the worm is easy to skew during the adjustment, the adjustment quantity of mesh clearance is smaller and seizure is easy to cause, with the design, the mesh clearance of the worm gear pair can be eliminated or adjusted by using the method of axially moving the dual-lead worm, and the center distance can not be changed, thereby having the advantages of compact structure, high repositioning precision, strong carrying capacity, high precision of axial adjustment of the mesh clearance and strong reliability.

Description

technical field [0001] The invention relates to a precision worm gear reducer. Background technique [0002] The worm gear pair of the traditional worm gear reducer uses the radial movement of the worm to adjust the meshing backlash, thereby changing the center distance of the transmission pair, which is unreasonable from the perspective of the meshing principle, because changing the center distance will cause the tooth surface contact to change Poor, or even aggravated wear, is not conducive to maintaining the accuracy of the worm gear pair, and the radial adjustment of the ordinary worm gear pair is difficult to grasp, and it is easy to cause the worm axis to be skewed during adjustment. The meshing clearance can only be adjusted to 0.03~0.08mm, no matter how small It is easy to bite to death. Contents of the invention [0003] In order to overcome the problems in the prior art that the radial adjustment of the worm gear pair of the ordinary worm gear reducer is difficu...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems in the prior art that the radial adjustment of the worm gear pair of the ordinary worm gear reducer is difficult to grasp, the worm axis is easily skewed during adjustment, the adjustment of the meshing gap is small and the problem of easy seizure, the present invention provides a precision Worm gear reducer, the precision worm gear reducer has compact structure, high repeat positioning accuracy, strong bearing capacity, high precision and high reliability of axial adjustment of meshing gap

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