CN201293086Y

CN201293086Y - Device for eliminating worm gear worm backlash

Info

Publication number: CN201293086Y
Application number: CNU2008202171194U
Authority: CN
Inventors: 崔海斌; 陈雨峰; 沈大为; 徐秀兵
Original assignee: JIANGSU GAOJING MECHANICAL& ELECTRICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU GAOJING MECHANICAL& ELECTRICAL EQUIPMENT CO Ltd
Priority date: 2008-11-27
Filing date: 2008-11-27
Publication date: 2009-08-19
Anticipated expiration: 2018-11-27

Abstract

The utility model relates to a device for eliminating the meshing clearance of a worm gear. Worm wheels are in a separate structure of which the relative position can be adjusted; a key slot is disposed on one of two worm wheel sheets, and an eccentric pin is mounted on the other worm wheel sheet; the small end of the eccentric pin is inserted in the key slot, and the two worm wheels generate relative rotation by rotating the eccentric pin so as to change the meshing clearance of a worm gear transmission device. The device is convenient to eliminate the meshing clearance of the worm gear and improve the transmission precision and the transmission stability, has simple structure and is convenient for adjustment.

Description

A kind of device of eliminating the worm and gear back lash

Technical field:

The utility model relates to mechanical transmission, particularly a kind of transmission device of eliminating the worm and gear back lash.

Background technique:

At present, worm gearing commonly used mainly adopts two kinds of methods to adjust the back lash, and to improve transmission accuracy, the first adopts two helical pitch worm and gear transmissions, but the difficulty of processing of worm screw is big and machining accuracy is difficult for guaranteeing; It two is the transmission centre distance that changes worm and gear, but complex structure and adjust difficulty.

Summary of the invention:

The utility model purpose is to overcome the deficiency of above two kinds of technology, and a kind of device that can eliminate the worm and gear back lash is provided.

The technological scheme that the utility model technical solution problem is adopted is: worm gear is adjustable minute body structure of relative position.

Worm gear contains two worm gear sheets, be processed with keyway on the worm gear sheet, a cam pin is installed on another worm gear sheet, and the cam pin small end is inserted in the keyway, changes the back lash of worm gearing thereby by the rotation cam pin two worm gears are produced relative rotation.

The beneficial effects of the utility model: can eliminate the worm and gear back lash easily, improve the stationarity of transmission accuracy and transmission, simple in structure, easy to adjust.

Description of drawings:

Below in conjunction with drawings and embodiments the utility model is elaborated.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A of Fig. 1 is to view.

Among the figure: the 1----transmission case body; The 2----upper ball cover; The 3----output shaft; The last worm gear sheet of 4----; Worm gear sheet under the 5----; The 6----key; The 7----pin-and-hole; The 8----cam pin; The 9----worm screw; The 10----keyway; The 11----lower ball cover; The 12----screw; 13----cam pin small end.

Embodiment:

In Fig. 1, time worm gear sheet 5 to be installed on the output shaft 3, and have been linked together by key 6, last worm gear sheet 4 is installed in down on the worm gear sheet 5 and by screw 12 and links together, and worm screw 9 drives and goes up worm gear sheet 4 and worm gear sheet 5 rotations down, thereby drives the rotation of output shaft 3.Last worm gear sheet 4 is provided with pin-and-hole 7, following worm gear sheet 5 is provided with keyway 10, cam pin 8 is installed in the pin-and-hole 7, cam pin small end 13 places keyway 10, when rotating cam pin 8, thereby last worm gear sheet 4 and following worm gear sheet 5 can produce relative rotation and change drive gap between itself and the worm screw 9, adjust that worm gear sheet 4 will be gone up with screw 12 in the back and following worm gear sheet 5 is fastening.

In Fig. 2, rotation along with cam pin 8, cam pin 8 is held greatly in the pin-and-hole 7 of last worm gear sheet 4 and is rotated, cam pin small end 13 is sliding in worm gear sheet 5 keyways 10 down, because of cam pin 8 big small end decentraction, so must cause worm gear sheet 4 to relatively rotate, thereby reach the back lash that changes 5 of worm screw 9 and last worm gear sheet 4 and following worm gear sheets along the following axle center of worm gear sheet 5.

Claims

1, a kind of device of eliminating the worm and gear back lash is characterized in that: worm gear is adjustable minute body structure of relative position.

2, a kind of device of eliminating the worm and gear back lash according to claim 1, it is characterized in that: worm gear contains two worm gear sheets, be processed with keyway on the worm gear sheet, a cam pin is installed on another worm gear sheet, the cam pin small end is inserted in the keyway.