CN201202784Y

CN201202784Y - Automatic compensation clearance ball screw

Info

Publication number: CN201202784Y
Application number: CNU2008200883531U
Authority: CN
Inventors: 夏根儿
Original assignee: HANGZHOU FUDE MACHINE TOOL MANUFACTURE CO Ltd
Current assignee: Hangzhou Ford Machine Tool Co., Ltd.
Priority date: 2008-06-04
Filing date: 2008-06-04
Publication date: 2009-03-04
Anticipated expiration: 2018-06-04

Abstract

The utility model relates to an automatic clearance compensation ball screw. The technical problem solved by the utility model is to provide an automatic clearance compensation ball screw which can compensate the clearance automatically along with the abrasion degree and can slide flexibly. The technical proposal which solves the problem includes that: an inwards concave left step is arranged on the outer circumference of the end surface on one side of a driving gasket; an inwards concave right step is arranged on the outer circumference of the end surface on one side of a driven gasket; the left step and the right step are assembled to form an annular concave groove in which a planar bearing is mounted. The automatic clearance compensation ball screw can be applicable to the movement of the workbenches of numeric controlled line cutting machines, machining centers, carving machines and the numeric controlled milling machines, and the devices which require accurate movement and high bearing capacity.

Description

The automatic compensation gap ball screw

Technical field

The utility model relates to a kind of ball screw, particularly a kind of automatic compensation gap ball screw.Be mainly used in numerically controlled wire cutting machine, machining center, engraving machine, the moving of working plates such as numerical control milling machine, and need accurately to move and need on the equipment of big carrying.

Background technique

In numerically controlled wire cutting machine, moving of working plate finished by ball screw, but owing to be the uncompensated device of single nut work, time one long lead screw and nut circle groove will wear and tear, and that the precision of wire cutting machine tool requires is higher, generally at about several, so a common leading screw is generally used about 2 years and will be scrapped, user cost is very high.In view of the above, the patent No. is that the Chinese utility model patent of ZL 200720110221.X discloses the technology that a kind of name is called " ball screw of torsion compensate for clearance ", the nut that this scheme has screw rod and is threaded with it, described nut comprises initiatively nut and driven nut, installs link between the two.This ball screw can prolong the working life of leading screw greatly along with the degree automatic compensation gap of wearing and tearing.But be close to mutually owing to the active packing ring with from washer in this patented technology, cause the slip underaction between active nut and the driven nut.

Summary of the invention

The technical problems to be solved in the utility model is: provide a kind of not only can be along with the degree automatic compensation gap of wearing and tearing, and the automatic compensation gap ball screw very flexibly that slides.

The technological scheme that the utility model adopted is: the automatic compensation gap ball screw, the active nut and the driven nut that have screw rod and be threaded with it, folder is established initiatively packing ring and from washer between two nuts, described active nut and initiatively between the packing ring and driven nut and from all connecting between the washer by driver blade, on described active packing ring, have semicircular left groove, have semicircular right groove described from washer, a described left side, after finishing, right groove assembling forms a toroidal cavity, pass through screw one resilient member in this cavity, this resilient member one end is fixed on the active packing ring, the other end axially is fixed on from washer symmetrically, it is characterized in that having on the excircle of described active packing ring one side end face the left step of indent, described excircle from washer one side end face has the right step of indent, a left side, right step assembling back forms an annular groove, adorns a plane bearing in it.

Described plane bearing is made of ball clamping ring and ball, and the ball clamping ring is ring, and its thickness is less than the diameter of ball, has on the circumference of ball clamping ring that a circle equates at interval and through hole that diameter and ball diameter are complementary, ball of placement in each through hole.

Described resilient member is a spring.

The beneficial effects of the utility model are: this ball screw has increased a plane bearing on original basis, not only can be along with the degree automatic compensation gap of wearing and tearing, prolong the working life of leading screw greatly, and it is very flexible to slide, existing picture can not get stuck.

Description of drawings

Fig. 1 is a main sectional view of the present utility model.

The A of Fig. 2 Fig. 1 is to view.

Fig. 3 is the main sectional view of active packing ring in the utility model.

Fig. 4 is the left view of Fig. 3.

Fig. 5 is from the main sectional view of washer in the utility model.

The right elevation of Fig. 6 Fig. 5.

Fig. 7 is the plan view of rolling bearing in the utility model

Fig. 8 is the main sectional view of Fig. 7.

Embodiment

Embodiment 1, as Fig. 1～shown in Figure 6, active nut 2 and driven nut 3 that present embodiment has screw rod 1 and is threaded with it, folder is established initiatively packing ring 4 and from washer 5 between two nuts, described active nut 2 and initiatively between the packing ring 4 and driven nut 3 and between the washer 5 all by driver blade 6 connections.On described active packing ring 4, have semicircular left groove 4-1, similarly, have semicircular right groove 5-1 described from washer 5, a left side after assembling is finished, right groove then forms a toroidal cavity 7, fix a spring 8 (Fig. 3 by screw 11 in this cavity, tapped hole 4-2 among Fig. 4 on the active packing ring, and Fig. 5, tapped hole 5-2 among Fig. 6 from the washer is used for rigging screw), this spring one end is fixed on the active packing ring 4, the other end axially is fixed on symmetrically from washer 5, utilize the elastic force of spring itself to make two nuts can lock (and nisi locking mutually, locked, only the pulling force with spring exceeds).When wearing and tearing take place leading screw, can utilize the elastic force of spring self to compensate the gap of generation automatically, thereby prolong the working life of reel according to the degree of wearing and tearing.

These routine characteristics are the left step 4-3 that have indent on the excircle of active packing ring 4 one side end faces, have the right step 5-3 of indent equally at the excircle from washer 5 one side end faces on the other side, after driving and driven packing ring assembling is finished, described left and right step just forms the groove of an annular, adorns a plane bearing in this groove.Described plane bearing is made of ball clamping ring 9 and ball 10, ball clamping ring 9 is ring, its thickness is less than the diameter of ball 10, has on the circumference of ball clamping ring 9 that a circle equates at interval and through hole that diameter and ball diameter are complementary, ball of placement in each through hole.The advantage of adorning this plane bearing is that slip is flexible when driving and driven packing ring relatively rotates, operational noise is little.

Claims

1, a kind of automatic compensation gap ball screw, the active nut (2) and the driven nut (3) that have screw rod (1) and be threaded with it, folder is established initiatively packing ring (4) and from washer (5) between two nuts, described active nut (2) and initiatively between the packing ring (4) and driven nut (3) and from all connecting between the washer (5) by driver blade (6), on described active packing ring (4), have semicircular left groove (4-1), have semicircular right groove (5-1) described from washer (5), a described left side, after finishing, right groove assembling forms a toroidal cavity (7), fix a resilient member (8) by screw (11) in this cavity, this resilient member one end is fixed on the active packing ring (4), the other end axially is fixed on symmetrically from washer (5), it is characterized in that: the left step (4-3) that has indent on the excircle of described active packing ring (4) one side end faces, described excircle from washer (5) one side end faces has the right step (5-3) of indent, a left side, right step assembling back forms an annular groove, adorns a plane bearing in it.

2, automatic compensation gap ball screw according to claim 1, it is characterized in that: described plane bearing is made of ball clamping ring (9) and ball (10), ball clamping ring (9) is ring, its thickness is less than the diameter of ball (10), have on the circumference of ball clamping ring (9) that a circle equates at interval and through hole that diameter and ball diameter are complementary, ball of placement in each through hole.

3, automatic compensation gap ball screw according to claim 1 and 2 is characterized in that: described resilient member (8) is a spring.