CN2219983Y

CN2219983Y - Complete cycle straight-line motion ball bearing

Info

Publication number: CN2219983Y
Application number: CN 94215232
Authority: CN
Inventors: 张军
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-22
Filing date: 1994-06-22
Publication date: 1996-02-14
Anticipated expiration: 2004-06-22

Abstract

The utility model relates to a complete-cycle straight-line motion ball bearing, which comprises a holder, an outer ring, steel balls, and a sealing ring. A ball track is a totally enclosed groove around the holder; one group of steel balls are positioned in the ball track; the outer ring is provided with support walls which are corresponding to the steel balls of the holder, are inwards convex and are uniformly distributed, and adjacent positions are provided with concave arcs which are uniformly distributed. The utility model avoids the phenomenon of the premature abrasion produced by the nonuniform load of a certain group of steel balls; the fabrication technology is simplified, and the production cost is reduced; the utility model is suitable for a standard straight-line motion ball bearing.

Description

The complete alternation ball bushing

The utility model relates to a kind of complete alternation ball bushing.

Linear motion bearing is a kind of bearing that can do linear reciprocating motion on axle, this kind bearing is made up of an outer shroud and multiple row steel ball and retainer etc., every group of steel ball all is present in the circular groove, be illustrated in figure 1 as the round circular orbit shape, this annular groove be distributed on the cylindrical shape outer shroud axially on, be straight line groove in the circular groove wherein with the axle mating part, Fig. 2 provides is a kind of model-standard type post view in the ball bushing, steel ball in Fig. 3 straight line groove stamps out inside supporting walls 2 by the cylindrical shape external annulus, in this kind structure, cause a certain group of steel ball because of being subjected to load bigger easily, promptly respectively organize steel ball and be subjected to the load inequality, make steel ball different with the outer shroud degree of wear, because of one group of raceway wearing and tearing is scrapped whole ball bushing too early, because outer ring structure, cause in manufacturing process, adopting 100 tons of stamping press punching press supporting walls, cause process equipment expense height, gap between required punch die and punch machines and mould is adjusted, positioning accuracy request is higher, the complexity of production is improved, thereby cost is higher.

The purpose of this utility model is to provide a kind of long service life, the simple complete alternation ball bushing of process structure.

The purpose of this utility model is achieved in that it comprises a retainer that has raceway, is arranged in the steel ball group of raceway, and the outer shroud of retainer and the seal ring that is positioned at the outer shroud two ends, and the retainer wall is axial, be communicated with from beginning to end by U-groove bevel, a sealing of formation The shape raceway, one group of steel ball is positioned at this In the shape raceway.

The utility model has changed retainer steel ball circuit form, circulate by Fig. 1, many groups steel ball small circle ring shown in Figure 2, improvement becomes the shape complete alternation as shown in Figure 9 of one group of steel ball form, avoided certain group steel ball because of being subjected to the uneven too early wear phenomenon that produces of load, the steel ball motion speed is consistent simultaneously, and the passing ability of bearing is better, outer ring structure of the present utility model need not to adopt large-scale pressure facility processing, there is simple machining equipment to process, simplified technology, reduced cost of production.

Fig. 1 is the round circular orbit plan view of existing ball bushing;

Fig. 2 is existing standard type ball bushing plan view;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the sectional view of the utility model assembly structure plan view;

Fig. 5 is the complete section figure of the utility model outer shroud plan view;

Fig. 6 is the left view of Fig. 5;

Fig. 7 is the utility model retainer plan view;

Fig. 8 is the plan view of Fig. 7;

Fig. 9 is the local unfolded drawing of the utility model retainer plan view;

Below in conjunction with drawings and Examples the utility model is further described.

The utility model as shown in Figure 4 comprises: retainer 3, and outer shroud 4 and steel ball 5 and seal ring 6, Fig. 7 are the retainer plan view, retainer 3 walls are axial, are communicated with from beginning to end by U-groove bevel, a sealing of formation 12, one groups of steel balls of shape raceway are positioned at this

In the shape raceway.The unfolded drawing that provides as Fig. 9 more can intuitively reflect, one group of steel ball 5 is arranged in the complete circulation type that raceway forms sealing, raceway 12 is the groove form with outer shroud supporting walls 8 corresponding linear ramps 10 among Fig. 7, two semi-circle pins 11 are arranged on the retainer 3, its purpose one be with outer shroud 4 on corresponding two semi-circle pin-and-holes 9 in the finger setting mode retainer 3 and outer shroud 4 are connected and fixed, as Fig. 5, Fig. 6 provides the outer shroud plan view, the outer wall of outer shroud is smooth cylindrical, the radially oriented axle center of its inwall protruding to supporting walls 8, it between the adjacent supports wall concave arc 7, its effect is with the space of activity to the steel ball except that straight line groove 7 in the raceway, the zone that the utility model after the assembling cooperates with axle is the steel ball in the straight line groove 10, and the remaining part of raceway 12 is blind groove.

Claims

1, a kind of complete alternation ball bushing comprises a retainer that has raceway, is arranged in the steel ball group of raceway, and the outer shroud of retainer and be positioned at the sealed at both ends circle of outer shroud, it is characterized in that: retainer (3) wall is axial, be communicated with from beginning to end by U-groove bevel, a sealing of formation

Shape raceway (12), one group of steel ball (5) is positioned at this

In the shape raceway (12).

2, a kind of complete alternation ball bushing according to claim 1 is characterized in that: its outer wall of described outer shroud (4) is smooth cylindrical, the radially oriented axle center of its inwall protruding to supporting surface (8), be concave arc (7) between adjacent support surfaces (8).