JP2554927Y2 - Machined cage for thrust roller bearings - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machined cage for a thrust roller bearing manufactured by cutting a forged product, a bar, or a cast product.

[0002]

2. Description of the Related Art As shown in FIG. 5, in a conventional machined cage for a thrust roller bearing, the inner surface of a pocket 20 has an arc surface 20a along the outer surface of a roller 21 as shown in FIG.
The pocket 20 has a planar shape as shown in FIG.
No oil groove was particularly formed in the shape along the outer surface of No. 1. Further, as shown in FIG. 7, the assembling was carried out using screws 22, which consisted of a retainer main body 23 and a lid 24 at the periphery of the retainer.

[0003]

In the above prior art, there is a problem that the gap between the roller and the cage is small, the lubricating property of the oil is insufficient, the rotational friction with the cage is large, and the roller does not rotate smoothly. was there.

[0004] Further, in the case of the separation type shown in Fig. 7, there is a problem that the head of the countersunk screw may hit the head when the outer diameter guide is used, and the strength is weak.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to dispose two vertically arranged two opposing members.
A machined cage of a thrust roller bearing which is disposed a plurality of rollers between the race, respectively above or below the inside and outside diameters
Of the inner and outer projections.
It is characterized in that it has an integral shape having circumferential and radial oil grooves on the surface facing the lower track .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention shown in FIGS. Reference numerals 1 and 2 denote bearing rings arranged opposite to each other. Numeral 3 denotes a retainer having projections 4 and 5 formed on the upper and lower inner diameters toward the opposed races 1 and 2, respectively, and the lower projection 5 is placed on the lower race 2 and the upper projection is formed. The protrusion 4 has a small gap between the upper race 1 and the retainer 3.
The up and down movement is restricted.

A plurality of pockets 6 are formed radially in the retainer 3 and tapered rollers 7 are fitted therein. A guide surface 8 facing the outer peripheral surface of the tapered rollers 7 has a flat shape, and the center of the guide surface is formed. The portion has an oil groove 9. A circumferential oil groove 10 is formed on the lower surface of the lower projecting portion 5, and a radial oil groove 10 ' is formed at an even position of the rollers. Reference numeral 11 denotes a rotating shaft which is inserted through the center holes of the bearing rings 1, 2 and the retainer 3, the flange 12 rotates while being pressed against the upper bearing ring 1, and the lower bearing ring 2 comes into contact with the fixing member 13, I have.

Next, the operation will be described. When the rotating shaft 11 rotates, the axial thrust force F rotates the tapered roller 7 via the upper orbit shaft 1. Sufficient oil flows from the oil groove 9 between the tapered roller 7 and the flat guide surface 8 of the cage 3 so that lubrication is good and friction is reduced, so that rotational friction of the cage 3 can be reduced.

The weight of the retainer 3 is supported by the lower race 2 and has a circumferential oil groove 10 and a radial oil groove 1 on its contact surface.
Since the 0 ' is formed, wear is prevented, frictional force due to the weight of the cage can be reduced, and even if the cage 3 attempts to fly up due to vibration, the upper protruding portion 4 prevents upward jumping to prevent upward jump. Noise can be prevented, and it is suitable for large cages with considerable weight.

[0010]

According to the present invention, there is provided a machined cage for a thrust roller bearing, wherein protrusions are provided on the inner and outer diameters, respectively, toward opposed races, and a guide surface of a cage pocket facing the roller raceway surface. Has a flat shape and has an oil groove, so that the lubricating property of the oil between the tapered rollers and the cage is improved, friction is reduced, and noise due to jumping of the cage can be prevented. Also, the inner lower track of the inner and outer diameter projections
Since circumferential and radial oil grooves are provided on the surface facing the ring ,
Since the lubricating oil can be sufficiently supplied and held between the facing surface and the bearing ring, the frictional resistance of this portion is reduced, and the wear of the retainer and the bearing ring can be prevented.

Further, since the cage has high strength, it is suitable for large bearings. Further, by reducing the friction between the raceway and the cage, the preload for preventing the roller from sliding can be reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a main part of a tapered roller bearing device using an embodiment of the present invention.

FIG. 2 is a front sectional view of a main part of the cage of FIG. 1;

FIG. 3 is a plan view in which tapered rollers are inserted into FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view of a conventional cage pocket.

FIG. 6 is a plan view of FIG. 5;

FIG. 7 is a front sectional view of a conventional cage.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 raceway ring 2 raceway ring 3 cage 4 protrusion 5 protrusion 6 pocket 7 tapered roller 8 guide surface 9 oil groove 10 circumferential oil groove 10 ′ radial oil groove

Claims (1)

(57) [Scope of request for utility model registration] 1. Two orbital rings which are vertically opposed to each other.
A thrust roller bearing having a plurality of rollers disposed between the inner and outer diameters, wherein the inner and outer diameters have projections provided toward upper or lower races, respectively.
An integrated machined cage for a thrust roller bearing having a circumferential and radial oil groove on the surface facing the road ring .