A structure for selecting the rotation angle of a shift fork for a worm gear reducer

Abstract

The invention discloses a structure for selecting a rotation angle by a shifting fork for a worm gear-worm reducer. The structure comprises a base, a complete-tooth worm gear, an incomplete-tooth worm gear, a worm and the shifting fork, wherein the complete-tooth worm gear and the incomplete-tooth worm gear are respectively connected to a shaft I and a shaft II; the shaft I and the shaft II are both mounted on the base via bearings; the tail end of the worm is connected to the shifting fork; the initial end of the worm is arranged between the complete-tooth worm gear and the incomplete-tooth worm gear; the complete-tooth worm gear and the incomplete-tooth worm gear are symmetrically distributed at two sides of the worm; and the shifting fork is arranged on a sliding groove and moves upwards and downwards under the action of a driving mechanism. According to the invention, the complete-tooth worm gear and the incomplete-tooth worm gear are both arranged on the worm gear-worm reducer, and the adopted shifting fork moves upwards and downwards to enable the worm to choose to be meshed with any one of the complete-tooth worm gear and the incomplete-tooth worm gear, so that the change of the rotation angle of the worm gear-worm reducer is realized, and the universality is good; and a difference between the complete-tooth worm gear and the incomplete-tooth worm gear is that whether a stopping sheet exists, so that the cost input is low.

Description

technical field [0001] The invention relates to the technical field of worm gear reducers, in particular to a structure for selecting a rotation angle of a shift fork for a worm gear reducer. Background technique [0002] At present, worm gear transmission is widely used in various reduction transmission devices due to its characteristics of large transmission ratio, stable transmission, and self-locking. In the prior art, the general worm gear reducer mostly rotates 360°, but for some application occasions, the rotation angle of the worm gear does not need to be as large as 360°, thus causing the existing worm gear The defect of poor versatility, such as a single-axis tracking solar power station only needs a rotation angle range of ±60°, if you want to use a worm gear reducer with a rotation angle of 360°, you need to add a limit design on the worm gear, which makes the cost large The amplitude increases, and the worm wheel has teeth at 360°, some teeth are not used in us...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a structure for selecting the rotation angle of a shift fork for a worm gear reducer, which can solve the problems of limited use occasions, poor versatility, complicated limit design, and large cost investment of the worm gear reducer in the prior art.

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