JPH0530554U - Solid type cage - Google Patents

Abstract

(57) [Abstract] [Purpose] In a solid cage used for a cylindrical roller bearing with a collar, to improve the lubrication performance at the sliding contact portion between the roller end surface and the race ring collar or the cage. [Structure] The cage 4 is a solid type having a beveled pocket 6 for holding and guiding the rollers 5, and has a circumferential groove 8 serving as a grease reservoir formed on the inner peripheral surface. The circumferential groove 8 is arranged in the axial range including the sliding contact portion 9 between the roller end surface and the pocket inner surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solid cage of a cylindrical roller bearing with a collar used for grease lubrication.

[0002]

[Prior Art]

 Conventionally, in a cylindrical roller bearing, a solid type retainer 51 is used as shown in FIG. 3, and a circumferential groove 52 serving as a grease reservoir is provided at the center of the inner peripheral surface of the retainer 51. By providing the circumferential groove 52 in this way, a part of the grease retained in the bearing is retained in the circumferential groove 52, and the lubrication performance of the sliding contact portion 54 between the rotating roller 53 and the cage 51 is improved. I am trying.

[0003]

[Problems to be solved by the device]

 However, since the circumferential groove 52 is an axial range that does not include the sliding contact portion 54 between the roller 53 and the cage 51, the flow of the grease supplied from the circumferential groove 52 into the rollers 53 and the pockets 57 is as shown in FIG. 4, the flow is as shown by the arrow, and the grease is not sufficiently supplied to the sliding contact portion 54. Therefore, there is a problem that lubrication becomes insufficient at the sliding contact portion 54 where heat is easily generated.

Further, in the cylindrical roller bearing having the collar portion 55a on the outer ring 55 as shown in FIG. 3, the collar portion 55a and the contact portion 58 with the end surface also make sliding contact, so that sufficient lubrication is required. If the circumferential groove 52 of the retainer 51 is in the central portion, the grease cannot be sufficiently supplied to the sliding contact portion 58 of the collar portion 55a. For this reason, insufficient lubrication in the collar portion 55a becomes a problem especially when used at high speed rotation. Even when the inner ring 56 has a collar portion, there is a problem of insufficient lubrication similar to the above.

An object of the present invention is to provide a solid type cage capable of improving lubrication performance in a sliding contact portion between a roller end surface and a race ring collar portion or a cage.

[0006]

[Means for Solving the Problems]

 This invention is applied to a solid cage having a pocket for holding and guiding a roller and used for a cylindrical roller bearing with a collar, in which a circumferential groove for accumulating grease is formed on the inner peripheral surface. . The circumferential groove of the cage having the above structure is arranged in the axial range including the sliding contact portion between the roller end surface and the pocket inner surface.

[0007]

[Action]

 According to this configuration, the circumferential groove holding grease is arranged in the axial range including the sliding contact portion between the roller end surface and the inner surface of the pocket, so that the grease in the circumferential groove or its base oil is When it is supplied into the rollers and pockets, it flows to the sliding contact portion between the roller end surface and the pocket inner surface. In addition, since the grease in the circumferential groove is supplied to the roller end face in this way, the grease is sufficiently supplied to the sliding contact part between the roller end face and the collar part of the bearing ring as the roller rotates. Become.

[0008]

【Example】

 An embodiment of this invention will be described with reference to FIGS. FIG. 1 shows a cross section of a cylindrical roller bearing 1 with a collar, in which a cage 4 is provided between an inner ring 2 without a collar and an outer ring 3 having a collar portion 3a on both sides. The cage 4 is of a solid type in which a cage body 4a, which has a pocket 6 for holding and guiding the rollers 5 cut out, and a cage side plate 4b, are integrally connected with a rivet 7.

The inner peripheral surface of the cage 4 is formed with two circumferential grooves 8 that serve as a grease reservoir. These circumferential grooves 8 are formed at the roller end surface and the pocket 6 at both ends of the roller 5, respectively. It is arranged in the axial range including the sliding contact portion 9 with the inner surface.

According to the bearing 1 having this structure, the clearance inside the bearing formed between the inner and outer rings 2 and 3, the cage 4 and the rollers 5 is filled with grease, and the circumferential groove 8 of the cage 4 is formed. It is used by collecting grease.

The grease held in the circumferential groove 8 is supplied to the rollers 5 and the pockets 6 in the state of grease or the state of base oil with use. At this time, since the circumferential groove 8 is arranged in the axial range including the sliding contact portion 9 between the end face and the pocket inner surface, the grease flow as shown by the arrow in FIG. Is also supplied with sufficient grease.

Further, since the grease of the circumferential groove 8 is supplied to the end surface of the roller 5 as described above, the grease attached to the end surface of the roller 5 comes into sliding contact with the flange portion 3a of the outer ring 3 as the roller 5 rotates. It will be supplied to 10.

As described above, sufficient grease can be supplied to the sliding contact portions 9 and 10 of the respective portions, and the lubricity performance is improved. Therefore, seizure damage due to heat generation due to insufficient lubrication of the sliding contact portions 9 and 10 and acceleration of deterioration of the grease in the bearing are prevented. In particular, since the lubrication performance of the sliding contact portion 10 of the collar portion 3a, which easily generates heat, is improved, it can be suitably used even for high-speed rotation.

In the above-mentioned embodiment, the case where the outer ring 3 is used for the bearing having the collar portion 3a is described. However, when the inner ring 2 is used for the cylindrical roller bearing having the collar portion, the collar portion is similar to the above. The effect of improving the lubrication performance can be obtained.

[0015]

[Effect of the device]

 In the solid cage of this invention, the circumferential groove that serves as a grease reservoir is arranged in the axial range including the sliding contact part between the roller end surface and the inner surface of the pocket, so that the grease retained in the circumferential groove is Flow to the sliding contact part between the inside surface of the pocket and the inner surface of the pocket, and lubrication is satisfactorily performed at this sliding contact part. Further, since the grease in the circumferential groove is supplied to the roller end surface, sufficient grease is supplied also to the sliding contact portion between the roller end surface and the collar portion of the bearing ring. In this way, sufficient grease can be supplied to the sliding contact portions of each portion where heat is likely to occur, and therefore the lubricating performance of the entire bearing is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a cylindrical roller bearing using a solid cage according to an embodiment of the present invention.

FIG. 2 is an operation explanatory view showing a grease flow in the cage.

FIG. 3 is a sectional view of a conventional cylindrical roller bearing.

FIG. 4 is an operation explanatory view showing a grease flow in the cage.

[Explanation of symbols]

1 ... Cylindrical roller bearing, 2 ... Inner ring, 3 ... Outer ring, 3a ... Collar part,
4 ... Retainer, 5 ... Roller, 6 ... Pocket, 8 ... Circumferential groove, 9
… Sliding contact part

Claims (1)

[Scope of utility model registration request] 1. A solid type cage used for a cylindrical roller bearing with a collar, which has a burr pocket for holding and guiding the roller, is provided with a circumferential groove for accumulating grease on an inner peripheral surface thereof. Is arranged in an axial range including a sliding contact portion between the roller end surface and the inner surface of the pocket.