CN102242767A - Guide bearing - Google Patents

Abstract

The invention discloses a guide bearing, comprising an outer ring which takes the shape of a circular shaft sleeve. Circumferentially arranged spherical rolling bodies are installed in the outer ring. The spherical rolling bodies are isolated through a retaining frame. Two ends of the outer ring are provided with stop rings for preventing the retaining frame from being separated from the outer ring. The outer ring and the retaining frame of the guide bearing disclosed by the invention are the same as an outer ring and a retaining frame of a needle bearing while the rolling bodies are spherical bodies, instead of rolling needles, and the guide bearing is different from a ball bearing because of not having an inner ring. When being used, the guide bearing moves circumferentially or axially and also can move circumferentially and axially at the same time relative to a shaft arranged in the guide bearing. Furthermore, the bearing also has an aligning function; a certain included angle between an axis in the guide bearing and an axis of the outer ring is allowed to exist; when a locating hole of the retaining frame is a kidney-shaped hole, the rolling bodies can be axially distributed in the kidney-shaped hole according to a stress condition; and the guide bearing is more rational and uniform to stress and more precise to locate.

Description

Guide bearing

Technical field

The present invention relates to rolling bearing, relate in particular to a kind of guide bearing.

Background technique

Rolling bearing is a kind of part commonly used in the mechanical rotation.Traditional rolling bearing is normally combined by rolling element and retainer, forms the rolling element assembly parts, and rolling element is the plane or circumferentially distributes, in the both sides of rolling element assembly parts or circumferencial direction inside and outside be furnished with raceway respectively.If the rolling element circumferential arrangement is radial antifriction bearing, the rolling element layout be plain thrust bearing, the common rolling element assembly parts of these bearings can only rotate around the axle center, is used in two parts and does between the circular movement relatively.The linear roller bearing that is mainly used in the relative moving linearly of two parts is that the axial and circumferential at axle sleeve internal surface or outer surface are furnished with many steel balls, is used for unlimited stroke and cylinder axis or axle sleeve and is used.Since the carrying steel ball with spool or axle sleeve be and contact, so maneuvering load is little.Steel ball rotates with minimum surface friction drag, thereby can obtain high-precision easy motion, but this bearing structure complexity, the manufacture cost height, and just can't satisfy for the structure that the aligning requirement is arranged.Can only be though spherical rolling bearing has the aligning effect around the circular movement in axle center.Therefore, just can't select, can only be solved, but complex structure by methods such as combinations for the rolling bearing that needs not only can have been made straight line and circular movement but also have an aligning effect, the cost height, some occasion is also because the restriction of size and can't realizing.

The content of invention

The objective of the invention is to overcome the shortcoming that exists in the prior art, provide a kind of simple in structure, processing, guide bearing easy for installation.

In order to solve the problems of the technologies described above, the present invention is achieved by the following scheme: it is characterized in that it includes the outer ring of circular shaft shell-like, the spherical rolling element of circumferential arrangement is installed in the outer ring, there is retainer to isolate between each spherical rolling element, is provided with the prevention retainer at the two ends of outer ring and deviates from the back-up ring of outer ring.

Described retainer is the waist circular port axial along the outer ring at the positioning hole of placing rolling element.

One is made in described back-up ring and outer ring.

Described rolling element is a steel ball.

According to the guide bearing that such scheme is made, the outer ring of its outer ring and retainer such as needle bearing and retainer, and rolling element is spherical non-needle roller, but difference and ball bearing, no inner ring.In use guide bearing can be installed in axle in the guide bearing relatively and makes circular movement or move axially also can make circular movement simultaneously and move axially, in addition, this bearing also has the aligning effect, allows to be installed in the interior axis of guide bearing and the axis of outer ring and has certain included angle.When the positioning hole of retainer was the oval hole, rolling element can move axially distribution according to stressing conditions in the oval hole, made stressed more reasonable, equal even more accurate positioning.

Description of drawings

Fig. 1 is the plan view of guide bearing;

Fig. 2 is the unfolded drawing of retainer;

Fig. 3 is that guide bearing is installed in the schematic representation that can circumferentially, axially reach the motion of inclination aligning on the axle.

Among the figure: 1, outer ring; 2, spherical rolling element; 3, retainer; 4, positioning hole; 5, back-up ring; 6, axle.

Embodiment

The invention will be further described below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural representation of guide bearing.As seen from the figure, it includes the outer ring 1 of circular shaft shell-like, the spherical rolling element 2 of circumferential arrangement is installed in the outer ring 1, described rolling element 2 is a steel ball, there is retainer 3 to isolate between each spherical rolling element 2, described retainer 3 is that 1 axial waist circular port is as shown in Figure 2 along the outer ring at the positioning hole 4 of placing rolling element, 1 two ends are provided with and stop retainer 3 to deviate from the back-up ring 5 of outer ring 1 in the outer ring, described back-up ring 5 is that 1 both ends of the surface form to in-flanges by punching press in the outer ring, makes one with outer ring 1.

Fig. 3 is that guide bearing is installed in the schematic representation on the axle.Because the rolling element of guide bearing be spherical, spherical rolling element 2 directly contact with axle 6, and therefore, guide bearing axle 6 relatively can be done circumferential, axial and the inclination aligning moves simultaneously.And spherical rolling element 2 can move to suitable position automatically according to the size of guide bearing with axle 6 deflection angle A in the oval shape positioning hole 4 of retainer 3, make the stressed more even of each spherical rolling element 2 in the guide bearing, and precision is higher.

Claims (4)

1. a guide bearing is characterized in that it includes the outer ring of circular shaft shell-like, and the spherical rolling element of circumferential arrangement is installed in the outer ring, has retainer to isolate between each spherical rolling element, is provided with at the two ends of outer ring to stop retainer to deviate from the back-up ring of outer ring.

2. guide bearing according to claim 1 is characterized in that described retainer is the waist circular port axial along the outer ring at the positioning hole of placing rolling element.

3. guide bearing according to claim 1 is characterized in that described back-up ring and outer ring make one.

4. guide bearing according to claim 1 is characterized in that described rolling element is a steel ball.