CN203488656U

CN203488656U - Back clearance reducing screw structure

Info

Publication number: CN203488656U
Application number: CN201320508869.8U
Authority: CN
Inventors: 潘忠豪
Original assignee: GMT Global Inc
Current assignee: Dongguan tripod Intelligent Automation Technology Co., Ltd.
Priority date: 2013-08-19
Filing date: 2013-08-19
Publication date: 2014-03-19
Anticipated expiration: 2023-08-19

Abstract

A back clearance reducing screw structure comprises a base, a driving screw, a spring, a seal cap and at least two locating pins. An accommodation chamber is formed inwards in the side end of the base, and the bottom edge of the accommodation chamber penetrates the other end of the base through a reducing screw hole to enable the accommodation chamber and the screw hole to be bound to form an abutting edge. At least two limit grooves are formed in a position in the inner wall of the accommodation chamber, which is opposite to the opening. The driving screw is screwed in the screw hole of the base, and the spring is arranged in the base accommodation chamber, so that one end of the spring abuts against the abutting edge of the base. A screw hole is formed in the center of the seal cap, a flange is arranged outwards circularly on the front and rear portions, and a plurality of gaps are formed in the flanges. The seal cap is screwed in the driving screw through the screw hole to push the spring inwards to be compressed. The locating pins are arranged in the opposite limit grooves and gaps in a penetrating mode to clamp the seal cap, so that the seal cap cannot rotate during the rotation of the driving screw. According to the structure, the usage is not limited easily, the screw hole can be screwed with the driving screw, the service life is long, and assembly is simple and rapid.

Description

Can reduce back clearance driving screw structure

Technical field

The utility model relates to a kind of back clearance driving screw structure that reduces, and espespecially a kind ofly avoids the empty stroke that runs to produce, and allows the higher driving screw structure of service precision.

Background technique

At present known without back clearance screw-rod structure, mostly be following structure, the patent announcement number No. 478573 " without the driving screw device of back clearance " that Qi Wei Patent Office checked and approved on March 1st, 91, the date of application of this patent is on April 12nd, 90, and by the claim of this patent and graphic in can analyze and learn, it still has following shortcoming: the cap head of (), its nut and hold-doun nut protrudes fixed pedestal side, allow known driving screw when mounted, also need to consider how to avoid the factors such as nut, hold-doun nut, easily limited in use; (2), it utilizes the locking of bolt to be fixed nut, easily, because two bolts are locked degree of depth difference, causes nut deflection, allows thread cannot be average produce and screw togather with driving screw, and then will speed up thread and damage.

Model utility content

The purpose of this utility model is to provide a kind of back clearance driving screw structure that reduces, it does not need to consider how to avoid the problems such as capping in using, in use, be difficult for limited, improved known driving screw nut because locking degree of depth difference, and easily there is the problem of deflection, allow the screw can certain and average screwing togather with driving screw, extended working life, its assembling be simple, rapidly.

In order to achieve the above object, the utility model provides a kind of back clearance driving screw structure that reduces, and it includes: a pedestal, a driving screw, a spring, a capping and at least two locating studs, wherein:

Described pedestal side is formed with a room toward in, described room root edge passes through out toward the pedestal the other end with the screw of a undergauge, allows room and screw have a common boundary and can form a resting edge, at room inwall, with respect to opening, is provided with at least two restraining grooves;

Described driving screw is screwed on the screw of pedestal, and driving screw two ends can be stretched out from room and screw;

Described spring is put into pedestal room, spring one end can be shored on the resting edge of pedestal, so as to accumulating the power that bullet is stretched outward;

Described capping central authorities have provided a screw, and all sides are formed with a plurality of breach, and this capping, makes toward interior goring push spring compression with screwhole spiro bonding on driving screw;

Described locating stud is located in relative restraining groove and breach, so that capping is fixed, allows capping can, when driving screw rotates, and then not produce together rotation.

Described capping is a circular block, and central authorities have provided a screw, and forward and backward each is equipped with a flange outward, cuts and be provided with a plurality of relative breach on flange.

Adopt after such scheme, the utlity model has following effect:

(1), the utility model can reduce back clearance driving screw structure, its capping is to be built in pedestal, the configuration of Gu mechanism is upper, does not need to consider how to avoid the problems such as capping, is difficult for limited in use;

(2), the utility model can reduce back clearance driving screw structure, it utilizes locating stud to insert restraining groove and breach simultaneously, so that capping is fixed, can improve known driving screw nut because locking degree of depth difference, and easily there is the problem of deflection, allow the screw can certain and average screwing togather with driving screw, to increase the service life;

(3), the utility model can reduce back clearance driving screw structure, it utilizes plugging of locating stud, does not need slow rotating bolt, it will be simpler in assembling, rapidly.

Accompanying drawing explanation

Fig. 1 is the three-dimensional combination figure that the utility model can reduce back clearance driving screw structure;

Fig. 2 is the three-dimensional exploded view that the utility model can reduce back clearance driving screw structure;

Fig. 3 is the combination section that the utility model can reduce back clearance driving screw structure;

Fig. 4 is the enlarged view of local A capping and the driving screw engagement of Fig. 3;

Fig. 5 is the local B pedestal of Fig. 3 and the enlarged view of driving screw engagement.

Embodiment

For auditor can be had a better understanding and awareness the purpose of this utility model, feature and effect, below coordinate the graphic embodiment of enumerating, detailed description is as follows:

First, by shown in Fig. 1 to Fig. 3, the utility model can reduce back clearance driving screw structure and include: a pedestal 10, one driving screw 20, one spring 30, one capping 40 and at least two locating studs 50, wherein, the side of pedestal 10 is formed with a room 11 toward in, room 11 root edges pass through out toward pedestal 10 the other ends with the screw 12 of a undergauge, allow room 11 have a common boundary and can form a resting edge 13 with screw 12, at room 11 inwalls, with respect to opening, be provided with at least two restraining grooves 14, driving screw 20 is screwed on the screw 12 of pedestal 10, driving screw 20 two ends can be stretched out from room 11 and screw 12, spring 30 is put into the room 11 of pedestal 10, spring 30 one end can be shored on the resting edge 13 of pedestal 10, so as to accumulating the power that bullet is stretched outward, capping 40 is a circular block, central authorities have provided a screw 41, before, rear each is equipped with a flange 42 outward, on flange 42, cut and be provided with a plurality of relative breach 43, this capping 40 is screwed on driving screw 20 with screw 41, make toward interior goring push spring 30 compressions, locating stud 50 is located in relative restraining groove 14 and breach 43, so that capping 40 is fixed, allow the capping 40 can be when driving screw 20 rotates, and then produce together rotation.

By said structure, during its actual use, utilize the pushing tow of spring 30, stopper pedestal 10 and capping 40 toward opposite direction away from, allow pedestal 10 and the screw 12,41 of capping 40 can be pushed against respectively the forward and backward flank of tooth of the thread 21 of driving screw 20, without the effect (please refer to Fig. 3 to Fig. 5) of back clearance, when driving, relatively without empty generation of running stroke, service precision is higher when reaching engagement action.

By the structure of above-mentioned specific embodiment, can obtain following beneficial effect:

(1), because capping 40 is built in pedestal 10, Gu mechanism configuration is upper, does not need to consider how to avoid the problems such as capping 40, is difficult for limited in use;

(2), utilize locating stud 50 to insert restraining groove 14 and breach 43 simultaneously, so that capping 40 is fixed, can improve known driving screw, nut because locking degree of depth difference, and easily there is the problem of deflection, allow the screw 41 can certain and average screwing togather with driving screw 20, to increase the service life;

(3), utilize plugging of locating stud 50, do not need slow rotating bolt, will be more in assembling simple, rapidly.

The above embodiment is only the preferred embodiment for absolutely proving that the utility model is lifted, and protection domain of the present utility model is not limited to this.Being equal to that those skilled in the art do on the utility model basis substitutes or conversion, all within protection domain of the present utility model.Protection domain of the present utility model is as the criterion with claims.

Claims

1. can reduce a back clearance driving screw structure, it includes: a pedestal, a driving screw, a spring, a capping and at least two locating studs, is characterized in that:

2. the back clearance driving screw structure that reduces as claimed in claim 1, is characterized in that: described capping is a circular block, and central authorities have provided a screw, and forward and backward each is equipped with a flange outward, cuts and be provided with a plurality of relative breach on flange.