JPH04127422U - Machined cage for thrust roller bearings - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention relates to a machined cage for thrust roller bearings, which improves the lubricity of oil between the tapered rollers and the cage to reduce friction and prevent cage jump-up. The purpose is to prevent noise. [Structure] This is a machined cage for thrust roller bearings, in which protrusions are provided on the inner and outer diameters toward the opposing bearing rings, the guide surface of the cage pocket facing the roller raceway surface is flat, and the cage is oil-free. An integrated machined cage for thrust roller bearings with grooves.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a thrust roller shaft manufactured by machining from a forged product, bar material, or cast product. Concerning a machined cage for acceptance.

0002

[Conventional technology]

A conventional machined cage for thrust roller bearings has a pocket 20 as shown in FIG. The cross-sectional shape of the inner surface was a circular arc surface 20a along the outer surface of the roller 21. Also, poke As shown in FIG. 6, the planar shape of the cut 20 is a shape that follows the outer surface of the roller 21, and is particularly shaped like an oil groove. was not formed. Moreover, as shown in FIG. 7, the cage main body 23 and the cage circumferential portion It consisted of a lid 24 and was assembled using screws 22.

0003

[Problem that the idea aims to solve]

In the above conventional technology, the gap between the rollers and the cage is small and the lubricity of the oil is insufficient. There was a problem in that the rotational friction with the cage was large and the rollers did not rotate smoothly.

0004 Also, if you use the separate type shown in Figure 7, the head of the countersunk screw will become hot when used with an outer diameter guide. There was a problem in that there was a risk of water damage and the strength was weak.

[0005]

[Means to solve the problem]

The purpose of this invention is to solve the above-mentioned problems. The retainer is provided with protrusions on the inner and outer diameters toward the opposing raceway, and the roller raceway The guide surface of the retainer pocket facing the surface is flat and has an oil groove. It is characterized by its integral shape.

[0006]

【Example】

Next, an embodiment of the present invention shown in FIGS. 1 to 4 will be described. 1 and 2 are opposite The bearing ring is arranged as follows. 3 is a cage with opposing tracks on the upper part of the inner diameter and the lower part of the outer diameter. Projections 4 and 5 are formed toward the bearing rings 1 and 2, and the lower projection 5 is formed toward the bearing ring 2 below. The upper protrusion 4 has a slight gap between it and the upper bearing ring 1, and is held The vertical movement of the vessel 3 is restricted.

[0007] A plurality of pockets 6 are formed radially in the cage 3, into which tapered rollers 7 are fitted. , the guide surface 8 facing the outer peripheral surface of the tapered roller 7 has a flat shape, and the guide surface 8 is flat in shape. It has an oil groove 9 at the center of the inner surface. Also, a circumferential oil groove 1 is provided on the lower surface of the lower protrusion 5. 0, and oil grooves 10' are formed at equidistant positions of the rollers. 11 is the rotating shaft and the bearing ring 1, 2 and the center hole of the retainer 3, and the collar 12 is in pressure contact with the upper raceway ring 1. The lower bearing ring 2 is in contact with the fixed member 13 as it rotates.

[0008] Next, the effect will be explained. When the rotating shaft 11 rotates, an axial thrust force F rotates the tapered roller 7 via the upper raceway shaft 1. Tapered roller 7 and retainer 3 flap Sufficient oil flows between the smooth guide surfaces 8 from the oil grooves 9, providing good lubricity and reducing friction. Therefore, the rotational friction of the retainer 3 can be reduced.

[0009] In addition, the weight of the retainer 3 is supported by the lower bearing ring 2, and an oil groove 10 and an oil groove are formed on the contact surface. 10' is formed to prevent wear and reduce frictional force due to cage weight. Even if the retainer 3 tries to jump up due to vibration, the upper protrusion 4 prevents it from jumping up. This prevents noise during rotation and is suitable for large cages with considerable weight.

0010

[Effect of the idea]

According to the present invention, it is a machined cage for a thrust roller bearing, in which the inner and outer diameters are each A protruding portion is provided toward the opposing raceway ring, and a retainer pocket facing the roller raceway surface. The guide surface is flat and integrated with an oil groove, so it is not conical. Improves the lubricity of oil between the rollers and cage to reduce friction and prevent the cage from jumping up. Can prevent noise.

[0011] In addition, the cage has high strength, making it suitable for large bearings. Furthermore, friction between raceway and cage is reduced. Therefore, the preload to prevent roller slipping can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of essential parts 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 shown in FIG. 1;

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

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

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

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

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

[Explanation of symbols]

1 Raceway ring 2 Raceway ring 3 Cage 4 Projection 5 Projection 6 pockets 7 Tapered roller 8 Guide surface 9 Oil groove 10 Oil groove 10' Oil groove

Claims (1)

[Scope of utility model registration request] 1. A machined cage for a thrust roller bearing, wherein protrusions are provided on the inner and outer diameters toward the opposing bearing rings, and the guide surface of the cage pocket facing the roller raceway surface is flat-shaped, An integrated machined cage for thrust roller bearings with an oil groove.