CN201944231U

CN201944231U - Micro-gear eliminating backlash mechanism

Info

Publication number: CN201944231U
Application number: CN2011200131230U
Authority: CN
Inventors: 殷律华
Original assignee: CHENGDU SEEKCON MICROWAVE COMMUNICATION Co Ltd
Current assignee: CHENGDU SEEKCON MICROWAVE COMMUNICATION Co Ltd
Priority date: 2011-01-17
Filing date: 2011-01-17
Publication date: 2011-08-24
Anticipated expiration: 2021-01-17

Abstract

The utility model discloses a micro-gear eliminating backlash mechanism which comprises the following parts: a potentiometer, a driving gear, a main gear, an auxiliary gear, torsion springs, a retainer ring and fastening screws. The inner bore of the main gear is set on the shaft of the potentiometer, and a hole is arranged on the terminal surface; the auxiliary gear is set on the step shaft of the main gear, and also a through-hole is arranged on the surface; one end of the torsion spring is inserted in the through-hole of main gear and the other end is inserted in the through-hole of vice gear; the retainer ring is set on the step axis of the main gear; one to three screw holes are disposed for mounting fastening screws along the radial direction of retainer ring; several holes are disposed on the corresponding locations of the main gear. The micro-gear consumer backlash mechanism can eliminate the transmission return differences and obtain sufficient torsion stiffness and is also easy for processing and debugging.

Description

A kind of miniature gears return difference mechanism that disappears

Technical field

The utility model relates to the precision drive technical field, is specifically related to a kind of miniature gears that transmission return difference that precision drive realizes the miniature gears pair eliminates return difference mechanism that disappears that is used for.

Background technique

When carrying out the precision drive design, reduce the control performance that return difference can improve closed loop control, pass at number and adopt split gear and elastic element combination can eliminate return difference on the transmission link.

Pass in the link at number, the combination of split gear that adopts and elastic element all adopts extension spring as elastic element usually, only is used for the bigger split gear of diameter, when gear diameter is very little, because there are not enough installing spaces, just can't use.

Summary of the invention

The technical problems to be solved in the utility model is: be directed to the deficiencies in the prior art, a kind of miniature gears return difference mechanism that disappears is provided, the transmission return difference of miniature gears can be eliminated by this miniature gears return difference mechanism that disappears, and obtains enough torsional stiffnesies, and convenient processing and debugging.

To achieve the above object of the invention, the technological scheme that the utility model adopted is: a kind of miniature gears return difference mechanism that disappears is provided, it is characterized in that: comprise potentiometer, driving gear, master gear, pinion, torsion spring, back-up ring and set screw; The inner hole sleeve of described master gear is on potentiometric axle, and its end face is provided with a through hole; Described pinion sky is enclosed within on the step axle of master gear, also offers a through hole on its end face; In the through hole on the one end insertion master gear end face of described torsion spring, the other end of torsion spring inserts the through hole on the pinion end face; Described back-up ring sky is enclosed within on the step axle of master gear, has radially offered one to three screw that is used to install and fix screw on the back-up ring, offers the through hole of quantity correspondence on the master gear in the corresponding position.

According to the miniature gears provided by the utility model return difference mechanism that disappears, it is characterized in that: the aperture of through hole is slightly larger than the diameter of set screw on the described master gear.

In sum, this practical miniature gears that provides return difference mechanism that disappears has following advantage:

1, the effect of torsion spring is arranged, and pinion keeps in touch with driving gear constantly, has just eliminated the gap of commutation fully, has realized zero return difference;

2, adopt this mechanism to realize disappearing return difference on little miniature gears about to 8, mechanism is compact reliable, and can compensation automatically behind gear wear, thereby uses very convenient.

Description of drawings

Fig. 1 is the disappear sectional view of return difference mechanism of miniature gears.

Wherein, 1, potentiometer; 2, driving gear; 3, master gear; 4, pinion; 5, torsion spring; 6, back-up ring; 7, set screw.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is done and to be described in detail:

As shown in Figure 1, this miniature gears return difference mechanism that disappears comprises potentiometer 1, driving gear 2, master gear 3, pinion 4, torsion spring 5, back-up ring 6 and set screw 7; The inner hole sleeve of described master gear 3 is on the axle of potentiometer 1, and its end face is provided with a through hole; Described pinion 4 skies are enclosed within on the step axle of master gear 3, also offer a through hole on its end face; In the through hole on one end insertion master gear, 3 end faces of described torsion spring 5, the other end of torsion spring 5 inserts the through hole on pinion 4 end faces; Described back-up ring 6 skies are enclosed within on the step axle of master gear 3, have radially offered one to three screw that is used to install and fix screw 7 on the back-up ring 6, offer the through hole of quantity correspondence on the master gear 3 in the corresponding position.

The aperture of through hole is slightly larger than the diameter of set screw 7 on the described master gear 3.Pinion 4 can rotate flexibly at the cylindrical of master gear 3, and torsion spring 5 has certain clearance with master gear 3 step axle peripheries.Described potentiometer can be a ring potentiometer, also can be to revolve change, and also can be the sensor of other measurement rotational parameters.

During installation, at first master gear is inserted in earlier torsion spring vertically, an end of torsion spring inserts the aperture of master gear; Be inserted in pinion again, the end face aperture of pinion be inserted in the other end of torsion spring; Then be inserted in back-up ring, the screw of back-up ring alignd with the radial direction through hole of master gear, and be screwed into set screw to certain depth; Stir pinion, several teeth that stagger tighten up torsion spring, and potentiometric axle is inserted in to the proper axial position with integral body in the holding position, makes the engagement of split gear and driving gear, last fastening set screw.

During work, a lateral tooth flank of driving gear contacts with the master gear flank of tooth, drives the rotation of potentiometer axle; The opposite side flank of tooth contacts with the flank of tooth of pinion, this survey flank of tooth that torsion spring promotes pinion contacts with driving gear constantly, like this, and when driving gear is reverse, driving gear drives pinion and rotates, and rotates round about and promote master gear by pinion by torsion spring.

By the effect of torsion spring, pinion keeps in touch with driving gear constantly, has just eliminated the gap of commutation fully, has realized zero return difference.Adopt this mechanism to realize disappearing return difference on little miniature gears about to 8, mechanism is compact reliable, and can compensation automatically behind gear wear, thereby uses very convenient.

The utility model is not limited to above-mentioned example, in claims of the present utility model institute restricted portion, and various distortion that those skilled in the art can make without creative work or revise the protection that all is subjected to this patent.

Claims

1. miniature gears return difference mechanism that disappears is characterized in that: comprise potentiometer (1), driving gear (2), master gear (3), pinion (4), torsion spring (5), back-up ring (6) and set screw (7); The inner hole sleeve of described master gear (3) is on the axle of potentiometer (1), and its end face is provided with a through hole; Described pinion (4) sky is enclosed within on the step axle of master gear (3), also offers a through hole on its end face; In the through hole on one end insertion master gear (3) end face of described torsion spring (5), the other end of torsion spring (5) inserts the through hole on pinion (4) end face; Described back-up ring (6) sky is enclosed within on the step axle of master gear (3), has radially offered one to three screw that is used to install and fix screw (7) on the back-up ring (6), and master gear (3) is gone up the through hole that offers the quantity correspondence in the corresponding position.

2. the miniature gears according to claim 1 return difference mechanism that disappears is characterized in that: the aperture that described master gear (3) is gone up through hole is slightly larger than the diameter of set screw (7).