CN105134881A

CN105134881A - Worm wheel and worm mechanism with reverse output function

Info

Publication number: CN105134881A
Application number: CN201510396090.5A
Authority: CN
Inventors: 曹西京; 曹凯
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-07-08
Filing date: 2015-07-08
Publication date: 2015-12-09

Abstract

The invention discloses a worm wheel and worm mechanism with the reverse output function. A worm wheel is fixed to a rack through fixing screws. A center shaft on the inner edge of a sector plate is hinged to the circle center of the worm wheel. A worm base is fixed to the lower side of the outer edge of the sector plate. A worm is arranged in the worm base and meshed with the outer edge of the worm wheel. The motion output form that only a worm drives a worm wheel to rotate in traditional worm wheel and worm transmission is overturned, and torque generated when the worm rotates directly pushes the sector plate through the worm base for two-way output; and due to the fact that a worm wheel shaft does not bear the torque, the diameter of the worm wheel shaft can be greatly reduced on the premise that it is guaranteed that the mechanism achieves large output torque, and the space interference problem between two vertically-staggered shafts is effectively solved. The worm wheel and worm mechanism is compact in structure, the size is reduced, the weight is reduced, output motion is stable, and no crawling or torsional vibration phenomenon exists; and the worm wheel and worm mechanism can be widely applied to the fields of precision machines, military industry machines, aerospace machines and the like.

Description

A kind of worm-and-wheel gear of Inverted Output

Technical field

The present invention relates to a kind of worm-and-wheel gear, particularly a kind of worm-and-wheel gear of Inverted Output, belongs to field of manufacture of precision machinery.

Background technique

Worm Wheel System is a kind of common mechanical transmission mechanism, very extensive in mechanical transmission fields application, the feature of Worm Wheel System is that single staged transmission ratio is large, unidirectional, self-locking can vertical interlaced shaft drive, single-direction transmission wherein refers to and can only be rotated by worm drive worm gear, then using the rotary motion of worm gear as output movement, for multiple mechanism transmission design, modal is exactly worm-gear speed reducer, is worm gear and worm screw to be contained in a containment housing with vertical interlaced axle to use as speed reducer.At metal cutting machine industry, worm-and-wheel gear is commonly used to realize dividing movement, as first-class in gear hobbing machine, calibration, mainly make use of the feature of worm-and-wheel gear single-direction transmission, opposite force from worm gear can not pass to worm screw, to ensure stationarity and the reliability of working angles.In Worm and worm-wheel gearings all at present worm gear be can not reverse direction actuation worm geared.This traditional Worm and worm-wheel gearing, large at ask for something output torque, the machinery that kinematic accuracy is high is often difficult to reach desirable usage requirement, to be worm-wheel shaft can produce when exporting high pulling torque main cause turns round shake, for overcoming this defect, the method strengthening worm-wheel shaft diameter can only be adopted to solve, but this makes troubles to again gang tool structural design, exacerbate the space interference between multiaxis revolution coordinate, increase coordinate space must be designed again to reduce space interference, make machinery overall huge and heavy, driving power is multiplied, produce creeping phenomenon.A kind of desirable drive mechanism is not also had can effectively to solve this technical barrier at present.

Summary of the invention

The object of the invention is effectively to solve existing Worm and worm-wheel gearing using scope little, output characteristics is limited, multiaxis revolution coordinate produces space interferes mutually, and the huge driving power of equipment is multiplied and produces the problems such as creeping phenomenon, and a kind of worm-and-wheel gear of Inverted Output is disclosed.

The present invention is achieved through the following technical solutions:

Be fixed in frame by several set screws by worm gear, the central shaft being located at sector inner edge is hinged at the center of circle of worm gear, and worm seat is fixed on the downside of the outer rim of sector by housing screw, and worm screw to be arranged in worm seat and to be meshed with worm gear outer rim.

The present invention to have overturned completely in traditional Worm Wheel System and can only have been rotated then using the form of the rotary motion of worm gear as movement output by worm drive worm gear, but the moment of torsion produced when being rotated by worm screw directly promotes sector by worm seat carries out two-way output.Because worm-wheel shaft does not bear moment of torsion, just can under ensureing that mechanism realizes the prerequisite of larger output torque, significantly reduce the diameter of worm-wheel shaft, thus solve driving mechanism arrange in space interference problem between two vertical interlaced axles, the compact structure of equipment can be made, volume-diminished, weight saving, there is output movement steady, without creeping and turning round the features such as shake phenomenon, solve the problem that traditional worm-and-wheel gear using scope is little and output characteristics is limited, the fields such as precision optical machinery, military project is mechanical, Aero-Space are mechanical can be widely used in.

Accompanying drawing explanation

Accompanying drawing 1 is that master of the present invention looks cross-sectional view.

Accompanying drawing 2 is plan structure schematic diagram of the present invention.

Reference character title is as follows: set screw 1, frame 2, worm gear 3, central shaft 4, sector 5, worm screw 6, worm seat 7, housing screw 8.

Embodiment

Now with the following Examples and accompanying drawing more detailed describing is done to the present invention:

Worm gear (3) wheel edge is provided with set screw (1), by set screw (1), worm gear (3) is fixed in frame (2), the inner edge of sector (5) is provided with central shaft (4), central shaft (4) is hinged at the center of circle of worm gear (3), worm seat (7) is contained on the downside of the outer rim of sector (5) by housing screw (8), and worm screw (6) to be arranged in worm seat (7) and to be meshed with worm gear (3) outer rim.

Worm gear wheel is continued to use screw to be fixed in frame by the present invention, limits it and rotates; Next is hinged on the center of circle of worm gear by the central shaft be positioned on sector by sector, the moment of torsion produced when rotating using worm screw directly promotes sector around the rotation of the worm gear center of circle as the form of movement output by worm seat, the direction exported is two-way, fundamentally change existing Worm and worm-wheel gearing and can only carry out by worm gear the form that exports, realize the Inverted Output of Worm and worm-wheel gearing.

Claims

1. the worm-and-wheel gear of an Inverted Output, it is characterized in that being achieved through the following technical solutions: by several set screws (1), worm gear (3) is fixed in frame (2), the central shaft (4) being located at sector (5) inner edge is hinged at the center of circle of worm gear (3), worm seat (7) is fixed on the downside of the outer rim of sector (5) by housing screw (8), and worm screw (6) to be arranged in worm seat (7) and to be meshed with worm gear (3) outer rim.

2. the worm-and-wheel gear of a kind of Inverted Output according to claim 1, is characterized in that: on worm gear (3) wheel edge, be provided with set screw (1), be fixed in frame (2) by worm gear (3) by set screw (1).