JP3088832B2 - Thrust bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thrust bearing, and more particularly to a thrust bearing with an elastic case used for a suspension of an automobile.

[0002]

2. Description of the Related Art As a thrust bearing of this type, one having a structure shown in FIG. 2 is generally known.

As shown in the figure, the thrust bearing includes a pair of races 101 and 102 facing each other and the races 1 and 2.
Roller 103 as a rolling element interposed between 01 and 102
An annular holder 104 for holding and guiding the rollers 103;
It is composed of a pair of cases 105 and 106 that house one of the two races 101 and 102 integrally, and cover the outer peripheral portion of the retainer 104 to seal between the two races.

The races 101 and 102 are made of metal and abut against rollers 103 from above and below respectively.
For example, a plurality of reference numerals 3 are housed in holding holes (not shown) formed in the holder 104 at equal intervals in the circumferential direction, and a plurality of the reference numerals 3 are arranged over the entire circumference of the holder. Therefore, the pair of races 101 and 102 can rotate with each other via the rollers 103.

The above cases 105 and 106 are made of an elastic material such as a synthetic resin material or rubber.
05 is the outer peripheral edge 1 of the cage 104
08, the inner peripheral side wall 109 of the other case 106 covers the inner peripheral edge 110 of the retainer 104, and the outer peripheral side wall 10
The retainer 104 is guided by regulating the position of the retainer 104 by the inner peripheral wall 7 and the inner peripheral side wall 109. The two cases 105 and 106 seal the inside of each other and are integrated as a thrust bearing.

[0006]

In the conventional thrust bearing described above, the position of the retainer 104 is regulated and guided by the inner peripheral side wall 109 of one case 105 and the outer peripheral side wall 107 of the other case 106. Therefore, the inner peripheral side wall 109 and the outer peripheral side wall 107 are worn by the use of the thrust bearing, and there is a possibility that rotational torque unevenness occurs. In particular, the retainer 104 is made of metal and the cases 105 and 106
If it is a synthetic resin material or the like , the wear progresses quickly, the life of the thrust bearing is shortened, and the bearing cannot be put to practical use.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and has as its object to provide a thrust bearing which has improved wear resistance of a case with respect to a cage.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to an opposed facing device.
A pair of bearing rings, a plurality of rolling elements interposed between the bearing rings,
A retainer that is interposed between the bearing rings and retains and guides the rolling element;
A thrust bearing, each of which is made of an elastic body and integrally accommodates one of the races, and covers the periphery of the retainer to seal between the races. The guide ring is interposed between the peripheral part of the container and the case.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a thrust bearing as an embodiment of the present invention. In the figure, the basic structure of the thrust bearing is the same as that of the conventional example shown in FIG. 2, and a pair of races 1 and 2, a roller 3, a cage 4, a synthetic resin or
And a pair of cases 5 and 6 made of an elastic body such as a rubber. The outer peripheral side wall 7 of the case 5 and the inner peripheral side wall 9 of the case 6 seal between the races 1 and 2 to be integrated as a bearing. Is what it is.

The feature of this embodiment is that the inner peripheral side wall 9 of the case 6
And a guide ring 11 interposed between the retainer 4 and the inner peripheral edge 10 of the retainer 4. The guide ring 11 is made of, for example, metal, and has an inner end portion of one of the races 1 and an inner peripheral side wall 1 of the case 5.
2 and are integrally accommodated and fixed. As described above, since the guide ring 11 is fixed by sandwiching it between the race 1 and the case 5, a special member for fixing the guide ring is not required, and the number of parts is reduced.

The guide ring 11 may have a larger diameter, and may be provided between the outer peripheral edge 8 of the retainer 4 and the outer peripheral side wall 7 of the case 5. Two guides may be provided so as to correspond to both peripheral edges, respectively. However, by providing the guide ring 11 so as to correspond to the inner peripheral edge 10 of the retainer 4 as described above, the diameter of the guide ring 11 is reduced, and the thrust The size and weight of the entire bearing are reduced.

The guide ring 11 may be made of a material other than metal, such as synthetic resin or ceramics, as described above.

A part of the guide ring 11 protrudes to a position close to the inner peripheral edge 10 of the retainer 4, and the outer peripheral surface of this protruding portion restricts the position of the retainer 4 in the radial direction with respect to the inner peripheral edge 10, and Guide in the circumferential direction. On the other hand, a clearance 13 is formed between the outer peripheral edge 8 of the retainer 4 and the outer peripheral side wall 7 of the case 5, and the retainer 4 does not contact the case 5 due to the clearance 13.

Therefore, when the pair of races 1 and 2 rotate relative to each other, the retainer 4 is guided only by its inner peripheral edge 10 by the guide ring 11, and the wear between the two is minimal and there is no torque unevenness. Demonstrate.

In this embodiment, the guide ring 11 is fixed to one of the cases 5, but a plurality of guide rings may be provided so as to correspond to both the cases 5 and 6. Case 6
A tapered surface 6a is formed on the outer periphery of the
The base 5 projects inward so as to face the tapered surface 6a.
The protrusion 5a is formed. With this configuration,
After the thrust bearing is assembled, both separate in the axial direction.
Internal space including the clearance 13
Can be lubricated by filling it with grease
You.

[0017]

As described above, according to the present invention,
Since the cage is regulated and guided by the guide ring, there is an effect that a thrust bearing having excellent wear resistance and high durability can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of a thrust bearing as an embodiment of the present invention.

FIG. 2 is a partial sectional view of a conventional thrust bearing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 2 Track ring 3 Roller (rolling element) 4 Cage 5, 6 Case 8 Outer rim 10 Inner rim 11 Guide ring

Claims (4)

(57) [Claims] 1. A pair of races facing each other, a plurality of rolling elements interposed between the races, a retainer interposed between the races and holding and guiding the rolling elements, each comprising an elastic body. A pair of cases that integrally house one of the races and cover a peripheral portion of the cage to seal between the races, the thrust bearing comprising: A thrust bearing, wherein a guide ring is interposed between a peripheral portion and the case. 2. The thrust bearing according to claim 1, wherein said guide ring is made of metal. 3. The guide ring according to claim 1, wherein the guide ring is provided corresponding to an inner peripheral edge of the retainer.
Or the thrust bearing according to claim 2. 4. The guide ring according to claim 1, wherein the guide ring is interposed between the race and the case.
A thrust bearing according to claim 1.