JP2001304271A - Double row roller bearing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double row roller bearing capable of preventing abnormal sound and early abrasion and providing favourable lubricity. SOLUTION: The double row roller bearing 10 has a holder 19 to hold a roller 95 between an outer ring raceway surface 93 of an outer ring 91 and an inner ring raceway surface 64 of an inner ring 92. The holder 19 is furnished with an annular part 20 along an intermediate collar 97 and a large number of pillar parts 21 extending from the annular part 20, and an outer peripheral surface 20A of the annular part 20 is guided to an inner peripheral surface 97A of the intermediate collar 97 as a guide surface. A first groove part 25 continued along the peripheral direction and a large number of second groove parts 26 communicated to the first groove part and to open to an end surface of the annular part 20 are provided on the outer peripheral surface 20A of the annular part 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double row roller bearing, and more particularly to a double row roller bearing capable of improving lubrication.

[0002]

2. Description of the Related Art As shown in FIG.
Outer ring 91, inner ring 92, outer ring raceway surface 93 of outer ring 91 and inner ring
Numerous rollers 95 arranged in rows between 92 inner ring raceway surfaces 94
A pair of outer collars 96, 96 provided on the inner peripheral surface of the outer ring 91,
It has a middle flange 97 provided between the outer flanges 96, 96, a greasing hole 98 penetrating from the outer peripheral surface of the outer ring 91 to the middle flange 97, and a retainer 99 for holding each roller 95. .

[0003] The retainer 99 has an annular portion 100 arranged along the middle flange 97, and a number of pillars 101 extending from both end faces of the annular portion 100 along the generatrix of each roller 95. . In this retainer 99, the outer peripheral surface of the annular portion 100 is guided on the inner peripheral surface of the middle flange 97 as a guide surface. In such a double row roller bearing 90, grease is pressure-fed inside from a housing (not shown) through a greasing hole 98, and then grease is passed between the outer peripheral surface of the annular portion 100 and the inner peripheral surface of the middle flange 97. Lubricated by being supplied to 95 rolling surfaces.

[0004]

Meanwhile, in the conventional double row roller bearing 90, the separation dimension S between the outer peripheral surface of the annular portion 100 and the inner peripheral surface of the middle flange 97 is 0.3 mm to 1.0 mm. Therefore, it is difficult for grease to enter inside, and there is a possibility that poor lubrication may occur. In order to solve this problem, a method of setting a large separation dimension S is conceivable. However, the allowable movement of the cage 99 in the radial direction becomes large, so that the behavior of the cage 99 becomes unstable. There is a possibility that abnormal noise or early wear may occur in the row roller bearing 90.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a double row roller bearing which can prevent abnormal noise and early wear and can obtain good lubricity. .

[0006]

SUMMARY OF THE INVENTION The present invention provides an outer race, an inner race, a plurality of rollers arranged in a plurality of rows between an outer raceway surface of the outer race and an inner raceway surface of the inner race, and the outer race and the inner race. A pair of outer flanges provided on one of the outer flanges and a middle flange provided between the outer flanges, and a lubrication penetrating from one of an outer peripheral surface of the outer ring and an inner peripheral surface of the inner ring to the middle flange. A hole, a retainer for retaining the rollers, the retainer is provided with an annular portion disposed along the middle flange, and a bus bar of each roller from both end surfaces of the annular portion. And a plurality of pillar portions extending along the inner ring surface, and one of an outer peripheral surface and an inner peripheral surface of the annular portion is guided as a guide surface on the peripheral surface of the middle flange. And

Then, in order to achieve the above-mentioned object,
The present invention relates to a first groove portion continuous along one circumferential direction of the guide surface and the peripheral surface of the middle flange, and a peripheral surface of the annular portion and the central flange communicating with the first groove portion. And a large number of second groove portions that are open on one end face of the second groove portion.

Here, the first groove portion may be provided at a position corresponding to the greasing hole on the inner peripheral surface and the outer peripheral surface of the guide surface or the middle flange, and may be rectangular, V-shaped, hemispherical or the like. Can be adopted. On the other hand, as the second groove, the first groove
It may be provided linearly along the generatrix of the inner peripheral surface and the outer peripheral surface of the guide surface or the middle flange, for example, so as to intersect the groove at a predetermined angle, or the inner periphery of the guide surface or the middle flange. It may be provided in a curved shape along the spiral direction of the surface and the outer peripheral surface.

[0009] In the double row roller bearing constructed as described above, for example, when the first groove and each second groove are provided on the guide surface, the grease pressure-fed inside through the greasing hole is formed by the first groove. Circulates along the circumference of the ring,
Next, since it is supplied between the outer raceway surface and the rolling surface at the inner raceway surface through each second groove portion, the distance between the inner peripheral surface of the middle flange and the guide surface can be increased without increasing the separation dimension. Good lubricity is obtained in comparison. In addition, when providing each 2nd groove part in the ring part of a retainer, if the opening position of each 2nd groove part is provided in the position corresponding to each pillar part, grease will not be obstructed by the end face of a roller, Grease can be smoothly supplied to the rolling surfaces of the rollers.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, in each embodiment described below, the members and the like already described in FIG. 5 are denoted by the same reference numerals or corresponding reference numerals in the drawings to simplify or omit the description.

As shown in FIG. 1, a double row roller bearing 10 according to a first embodiment of the present invention includes an outer ring 91, an inner ring 92, and an outer ring 91.
A plurality of rollers 95 arranged in a plurality of rows between the outer ring raceway surfaces 93, 93 and the inner ring raceway surface 94 of the inner ring 92; a pair of outer collars 96, 96 provided on the inner peripheral surface of the outer ring 91; , 96, a greasing hole 98 penetrating from the outer peripheral surface of the outer ring 91 to the middle flange 97, and a retainer 19 for holding each roller 95. The retainer 19 has an annular portion 20 arranged along the middle collar 97.
And a number of pillar portions 21 extending from both end surfaces of the annular portion 20 along the generatrix of each roller 95. In the retainer 19, the outer peripheral surface 20A of the annular portion 20 is guided on the inner peripheral surface 97A of the middle flange 97 as a guide surface.

The retainer 19 includes a first groove 25 continuous along the circumferential direction of the outer peripheral surface 20A of the annular portion 20,
A large number of second grooves 26A and 26B are provided to communicate with the first groove 25 and open at the end face of the annular portion 20. First
The groove 25 has a substantially rectangular cross section corresponding to the position where the greasing hole 98 is formed, and the width of the first groove 25 is formed slightly larger than the diameter of the greasing hole 98. Each second groove 26A, 26
B has a substantially semicircular cross section and is provided linearly along the generatrix on the outer peripheral surface 20A of the annular portion 20. And the 2nd groove part 26A is provided in the position corresponding to the pillar part 21,
The second groove 26B is provided at a position corresponding to between the pillars 21,21. These second grooves 26A and 26B are provided in the same number.

According to the double row roller bearing 10 as described above, the grease that has been pressure-fed into the inside through the greasing hole 98 is formed in the first groove 25.
Circulates along the circumferential direction of the annular portion 20 and then
It is supplied between the outer raceway surface 93, the inner raceway surface 94 and the rolling surface at 95 through the grooves 26A and 26B. That is, according to the double row roller bearing 10 described above, the inner peripheral surface of the middle flange 97 and the guide surface 20
Good lubricity can be obtained as compared with the related art without increasing the separation dimension between A and, in other words, without causing abnormal noise or premature wear.

According to such a double row roller bearing 10, the second groove 26A provided at a position corresponding to the column 21 is provided.
And a second groove provided at a position corresponding to between the pillars 21 and 21
Since the same number of 26Bs are provided, grease can be reliably and evenly supplied to the end faces and the rolling surfaces of the rollers 95, thereby obtaining good lubricity.

As shown in FIG. 2, a double-row roller bearing 30 according to a second embodiment of the present invention has outer flanges 36, 36 and a middle flange 37 provided on the outer peripheral surface of an inner ring 32. The hole 38 penetrates from the inner peripheral surface of the inner ring 32 to the middle flange 37, and the inner peripheral surface 40B of the annular portion 40 forming the retainer 39 serves as a guide surface for the outer peripheral surface of the middle flange 37.
You will be guided to 37A. The retainer 39 has a first portion continuous along a circumferential direction of an inner peripheral surface 40B which is a guide surface of the annular portion 40.
A groove 45 and a number of second grooves 46A and 46B communicating with the first groove 45 and opening at the end face of the annular portion 40 are provided.

According to the double row roller bearing 30 as described above, the grease flows between the outer raceway surface 33 and the inner raceway surface 34 and the rolling surface 95 through the first groove portion 45 and the second groove portions 46A and 46B. As described above, the first lubrication property can provide better lubricity as compared with the related art without causing abnormal noise or premature wear.
An effect similar to that of the embodiment can be obtained.

As shown in FIG. 3, in a double row roller bearing 50 according to a third embodiment of the present invention, outer flanges 56, 56 and a middle flange 57 are provided on an inner peripheral surface of an outer ring 51, and a supply roller is provided. The oil hole 58 penetrates from the inner peripheral surface of the outer ring 51 to the middle flange 57, and the outer peripheral surface 100A of the annular portion 100 constituting the retainer 99 is guided to the inner peripheral surface 57A of the middle flange 57 as a guide surface. And this Nakatsuba 57 is the inner peripheral surface
A first groove 65 continuous along the circumferential direction of 57A, and a first groove
A large number of second grooves 66 are provided which communicate with the inner wall 65 and open at the end face of the middle flange 57.

According to the double row roller bearing 50 as described above, the grease that has been pressure-fed into the inside through the greasing hole 58 is formed in the first groove 65.
Circulates along the circumferential direction of the middle flange 57, and is then supplied to the outer raceway surface 53, the inner raceway surface 54 and the rolling surfaces at 95 through each second groove portion 66, and to the end surface of each roller 95. ,
The same effects as those of the first and second embodiments can be obtained.

As shown in FIG. 4, a double row roller bearing 70 according to a fourth embodiment of the present invention has outer flanges 76, 76 and a middle flange 77 provided on the outer peripheral surface of an inner ring 72, and lubrication. The hole 78 penetrates from the inner peripheral surface of the inner ring 72 to the middle flange 77, and the inner peripheral surface 80A of the annular portion 80 forming the retainer 79 serves as a guide surface.
You will be guided to 77A. And this middle flange 77 is an outer peripheral surface 77A.
And a plurality of second grooves 86 communicating with the first grooves 85 and opening at the end face of the middle flange 77.

According to the double row roller bearing 70 as described above, the grease that has been pressure-fed into the inside through the greasing hole 78 is supplied to the first groove 85.
Circulates along the circumferential direction of the middle collar 77, and then between the outer raceway surface 33 of the outer race 31, the inner raceway surface 74 of the inner race 72 and the rolling surface of 95 through each second groove portion 86, and between the rollers 95. Since it is supplied to the end face, the same effects as those of the above-described first to third embodiments can be obtained.

The double-row roller bearing of the present invention is not limited to the above embodiments, but can be appropriately modified and improved. The outer ring, the inner ring, and the outer ring illustrated in the above embodiments can be used. The material, shape, dimensions, form, number, location, etc. of the outer ring raceway surface, inner ring raceway surface, rollers, outer collar, middle collar, greasing hole, cage, ring, first groove, second groove, etc. The present invention is arbitrary and not limited as long as the present invention can be achieved.

[0022]

As described above, according to the present invention, according to the present invention, the first groove provided on the guide surface or the peripheral surface of the middle flange, and both end surfaces of the guide surface or the middle flange communicating with the first groove. The grease is supplied to the rollers through a large number of second grooves that are open to the inside, so that a better lubricating property can be obtained as compared with the related art without increasing the distance between the peripheral surface of the middle flange and the guide surface. Can be

[Brief description of the drawings]

FIG. 1 is a sectional view and a main part perspective view showing a first embodiment according to the present invention.

FIG. 2 is a sectional view and a main part perspective view showing a second embodiment according to the present invention.

FIGS. 3A and 3B are a cross-sectional view and a main part perspective view showing a third embodiment according to the present invention.

FIGS. 4A and 4B are a sectional view and a main part perspective view showing a fourth embodiment according to the present invention.

FIG. 5 is a sectional view showing a conventional double-row cylindrical roller bearing.

[Description of Signs] 10, 30, 50, 70 Double-row roller bearings 19, 39, 79, 99 Cage 20, 40, 80, 100 Circular part 21, 41, 81, 101 Column part 25, 45, 55, 85 1st groove 26,46,56,86 2nd groove 31,51,91 Outer ring 32,52,92 Inner ring 33,53,93 Outer ring raceway surface 34,54,94 Inner ring raceway surface 36,56,76,96 Outer Tsuba 37, 57, 77, 97 Nakatsuba 38, 58, 78, 98 Lubrication hole 95 Rollers

Claims (1)

[Claims] 1. An outer race, an inner race, a plurality of rollers arranged in a plurality of rows between an outer raceway surface of the outer race and an inner raceway surface of the inner race, and a pair provided on one of the outer race and the inner race. The outer collar and the middle collar provided between the outer collars, a greasing hole penetrating from one of the outer peripheral surface of the outer ring and the inner peripheral surface of the inner ring to the middle collar, and holding each roller A retainer for performing, the retainer, the annular portion disposed along the middle collar,
A plurality of pillars extending from both end surfaces of the annular portion along the generatrix of the rollers, and one of an outer peripheral surface and an inner peripheral surface of the annular portion serves as a guide surface, and A double-row roller bearing guided on a peripheral surface of the first groove portion, the first groove portion being continuous along a circumferential direction of one of the guide surface and the peripheral surface of the middle flange, and communicating with the first groove portion. A double row roller bearing, wherein a number of second grooves are provided on one end surface of the annular portion and the peripheral surface of the middle flange.