JP2003184892A - Roller bearing with pin-type cage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller bearing with a pin-type cage, in which rotation of a pin with a roller is surely inhibited, and assembly operation is simplified. <P>SOLUTION: The roller bearing with a pin-type cage is provided with a pair of a plurality of pins rotatively supporting a plurality of hollow rollers, and a pair of side plates which are formed annularly, and arranged parallel with each other, and have a plurality of insertion holes in which respective ends of pins are to be inserted. A groove having depth in the radial direction is provided at least one end of the outside periphery of the pin. A radially extending through-hole communicating with the insertion hole is made in the side sheet. A securing member is attached to the through hole, and the rip end of the member is fit to the groove. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a roller bearing with a pin type cage.

[0002]

2. Description of the Related Art Conventionally, large-sized bearings, which are often used in low-speed and high-load industrial machines and steel facilities, are provided with pin type cages (hereinafter also referred to as cages) as shown in FIGS. Tapered roller bearings are widely used. Here, FIG. 7 to FIG. 9 are partial cross-sectional views in which the conventional pin type cage is cut in the circumferential direction.

A pin type cage 71 shown in FIG. 7 has two parallel side plates 72 and a pin 74 penetrating the center hole of a hollow roller 73 interposed between the side plates 72. 73 is rotatably held. One end of the pin 74 is welded and fixed to the one side plate 72 of the retainer 71 by the welded portion 75, and the other end thereof is screwed and fixed to the other side plate 72 by the screw portion 76. . Figure 8
In the pin type retainer 81 shown in FIG. 1, one end of the pin 84 is welded and fixed to one side plate 82 of the retainer 81 by the welded portion 85, and the other end is screwed to the other side plate 82 by the screw portion 87. It is configured to be. Also,
A welded portion 86 is provided at the end of the pin 84 fixed by the screw portion 87. In the pin type retainer 91 shown in FIG. 9, one end of the pin 94 is welded and fixed to one side plate 92 of the retainer 91 by the welded portion 95, and the other end is fixed to the other side plate 92 by the screw portion 96. It is configured to be screwed. Also, the welded portion 95 of the pin 94
A cylindrical bush 97 is fitted between the side end portion and the side plate 92.

[0004]

As described above, in the pin type cage provided in the conventional roller bearing, one end or both ends of the pin are fixed by welding and the other end is fixed by screws. It is generally done. Since it is necessary to weld and fix one end or both ends of each pin, it takes a lot of time to assemble the bearing in manufacturing the bearing.
In addition, it is difficult to control the quality of the welded part between the side plate and the pin, and if the welded part is damaged due to factors such as excessive load or impact, the pin part will rotate around and the screw part of the pin will loosen, resulting in the worst case. In this case, the pins may fall out of the cage and damage the device. In addition, if this weld is damaged due to excessive load or shock, the pin and the pin may rotate together, the screws that fix the pin may loosen, and the pin may fall out of the cage and damage the device. Was a concern. The present invention has been made in view of the above circumstances, and an object thereof is to provide a roller bearing provided with a pin-type cage that eliminates welding in an assembly process and further prevents the pin-type cage from falling off due to co-rotation with a pin. It is in.

[0005]

The above object of the present invention is to provide a plurality of pins for rotatably supporting a plurality of hollow rollers and annularly formed pins arranged in parallel with each other so that the ends of the pins are inserted. A roller bearing including a pin type retainer having a pair of side plates provided with a plurality of insertion holes, wherein a groove having a radial depth is provided at least at one end of an outer peripheral surface of the pin. A pin type in which a through hole that extends in the radial direction and communicates with the insertion hole is provided in the side plate, a fixing member is mounted in the through hole, and a tip of the fixing member engages with the groove portion. Achieved by roller bearings with cages. According to such a structure, when fixing the side plate and the pin of the cage, it is only necessary to engage the fixing member mounted on the side plate with the groove provided at the end of the pin, and therefore, the welding portion is provided. No need for assembly work.

In the above structure, the fixing member is
For example, a set screw, a spring pin, and a knock pin. Further, as a retainer for the fixing member, a caulking process may be performed between the fixing member and the side plate. In the above-mentioned configuration, it is preferable that a convex portion having a height capable of being press-fitted into the insertion hole in the axial direction of the pin is continuously provided on the outer circumferential surface of the pin on the circumference. By doing so, it is possible to more firmly fix the side plate and the end portion of the pin. By co-rotating with the pin, it is possible to prevent the joint portion with the side plate from loosening and to prevent the pin from falling out of the side plate, and it is possible to remarkably prevent damage to the device / equipment incorporating this pin type roller bearing. It is preferable that the groove has a shape that makes surface contact with the tip of the fixing member. With this configuration, the pin and the side plate can be more securely fixed, and the pin can be prevented from co-rotating with the roller. Further, if the groove has a flat bottom with which the tip of the fixing member comes into surface contact, the pin and the side plate can be fixed more reliably.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partial sectional view showing a first embodiment of a pin type cage provided in a roller bearing according to the present invention. FIG. 2 is a sectional view taken along the line AA of FIG. As shown in FIG. 1, the pin type cage 11 has a plurality of hollow rollers (hereinafter, also referred to as rollers) around the outer peripheral surface.
It has a plurality of pins 14 that rotatably support 13 and a pair of side plates 12 that fix both ends of each pin 14. The side plates 12 are formed in an annular shape, are arranged parallel to each other and are concentric with each other, and a plurality of insertion holes 12a are provided at equal intervals in the circumferential direction. Insertion hole 12 of each side plate 12
Each end of the pin 14 is inserted in a. Before inserting both ends of the pin 14 into the side plate 12, the pin 14
Hollow rollers 13 are externally fitted to the outer peripheral surface of so as to be rotatable.

At the end of the pin 14, there is formed a groove 14a that circulates near the end of the outer peripheral surface of the pin 14 and has a depth in the radial direction of the pin 14. The cross section of the groove 14a has a semicircular shape.

The side plate 12 is formed with a through hole 12b extending in the radial direction from the inner diameter surface so as to communicate with the insertion hole 12a. The through hole 12b is opened so as to correspond to the axial position with the groove portion 14a formed in the pin 14 when the end portion of the pin 14 is inserted into the insertion hole 12a of the side plate 12.

In the through hole 12b, a set screw 15 which functions as a fixing member for fixing the pin 14 is provided with a side plate 12.
It is press-fitted in the radial direction from the inner diameter surface. In the state where the whole set screw 15 is pressed into the through hole 12b,
The tip of the set screw 15 strongly presses the bottom of the groove 14a of the pin 14 to engage the set screw 15 and the groove 14a,
The pin 14 and the side plate 12 are fixed. Set screw 1
In order to prevent 5 from coming off from the through hole 12b, a caulking process is applied to the gap between the inner surface of the through hole 12b and the outer peripheral surface of the set screw (fixing member) 15.

According to the configuration of this embodiment, in the pin type retainer 11, the pin 14 inserted into the insertion hole 12a of the side plate 12 has the groove 14a and the set screw 1 as a fixing member.
It is fixed to the side plate 12 by the engagement with the tip of 5. Therefore, the pin type cage 11 does not need to weld the end portion of the pin 14 and the side plate 12, and the groove portion 14 is not necessary.
Since it is not necessary to provide a threaded portion on the end of the pin 14 provided with a, the assembly process is simplified. Further, it is possible to prevent troubles such as loosening of the portion where the pin 14 and the side plate 12 are fixed due to the co-rotation of the pin 14 or the pin 14 falling off from the side plate 12.

In this embodiment, both ends of the pin are fixed by the set screws (fixing members) of the side plates.
You may make it fix only at least one end part of a pin. However, in order to surely fix the pin, it is preferable to fix both ends of the pin to the side plate with fixing members. The same applies to the following embodiments and modifications.
The cross-sectional shape of the groove is not limited to the semicircular shape, and may be a square shape, a rectangular shape, a triangular shape, or the like.

As a modification of this embodiment, as shown in FIG. 3, the pin 14 has a height near the end of the outer peripheral surface, which is intermittently continuous in the axial direction having a height capable of being press-fitted into the insertion hole. It has a convex portion (knurl) K formed on. Specifically, in a state in which the pin 14 is inserted into the insertion hole 12a, the end portion of the outer peripheral surface of the pin 14 which is in contact with the surface defining the insertion hole 12a and / or faces with a very small gap, A knurl (not shown) is used to form a substantially striped pattern composed of a plurality of slits extending in the axial direction of the pin 14. By doing so, the pin 14 and the side plate 12 can be more reliably fixed.

Next, a second embodiment of the present invention will be described.
In the embodiments described below, members having the same configurations and operations as those already described will be given the same or corresponding symbols in the drawings to simplify or omit the description. FIG. 4 is a partial cross-sectional view showing this embodiment. FIG. 5 is a sectional view taken along line BB of FIG. In the present embodiment, the groove portion 24a formed at the end portion of the outer peripheral surface of the pin 24 has a flat bottom surface that extends over a portion of the end portion 24a in the circumferential direction. That is,
The groove 24a has a substantially arcuate shape when the cross section of the pin 24 cut in the radial direction is viewed. When the set screw 25 that functions as a fixing member is press-fitted from the through hole 22b, the tip of the set screw 25 is configured to come into surface contact with the flat bottom portion.

According to the configuration of this embodiment, the roller bearing provided with the pin type cage 21 has the same effect as that of the first embodiment. Further, as shown in FIG. 5, the bottom portion of the groove portion 24a is formed in a flat shape, and the bottom portion is fixed by the set screw 25, so that the pin 24 and the side plate 22 are more securely fixed, and the pin 24 and 23 It is possible to prevent circulation due to. At the same time, it is possible to prevent the pin 24 from coming off the side plate 22. Further, as shown in FIG. 6, similarly to the first embodiment, a protrusion (knurl) K may be formed near the end of the outer peripheral surface of the pin 24.

The present invention is not limited to the above-described embodiments, but can be appropriately modified and improved. The fixing member is not limited to the set screw. For example, a spring pin or a knock pin may be used as the fixing member. For example, in the above embodiment, the fixing member is press-fitted into the through hole extending radially from the inner diameter surface of the side plate. However, the through hole extending radially from the outer diameter surface is formed, and the through hole is formed. A fixing member may be pressed into. Also,
The through hole is not limited to the radial direction of the side plate, and may be formed to be inclined toward the roller side or the side opposite to the roller as long as the fixing member and the groove portion of the pin can be appropriately engaged with each other.

[0017]

As described above, according to the present invention,
It is possible to provide a roller bearing equipped with a pin type retainer that more reliably prevents the pin from rotating around and simplifies the assembly process.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a partial cross-sectional view showing a modified example of the first embodiment.

FIG. 4 is a partial cross-sectional view showing a second embodiment of the present invention.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a partial cross-sectional view showing a modified example of the second embodiment.

FIG. 7 is a partial cross-sectional view showing a conventional pin type cage.

FIG. 8 is a partial cross-sectional view showing a conventional pin type cage.

FIG. 9 is a partial cross-sectional view showing a conventional pin type cage.

[Explanation of symbols]

11, 21 pin type cage 12, 22 Side plate 12a, 22a insertion holes 12b, 22b through holes 13, 23 (hollow) rollers 14, 24 pin 14a, 24a groove 15, 25 Set screw (fixing member)

Claims (4)

[Claims] 1. A pair of side plates provided with a plurality of pins that rotatably support a plurality of hollow rollers, and a plurality of insertion holes that are annularly formed and arranged in parallel with each other and into which the ends of the pins are inserted. A roller bearing provided with a pin type cage having: a groove having a radial depth in at least one end of an outer peripheral surface of the pin; A roller bearing with a pin type cage characterized in that a through hole communicating with the hole is provided, a fixing member is mounted in the through hole, and a tip of the fixing member engages with the groove portion. 2. The pin type according to claim 1, wherein a convex portion having a height capable of being press-fitted into the insertion hole in the axial direction of the pin is continuously provided in the vicinity of the groove on the outer peripheral surface of the pin on the circumference. Roller bearing with cage. 3. The roller bearing with a pin type cage according to claim 1, wherein the groove has a shape such that the groove comes into surface contact with the tip of the fixing member. 4. The roller bearing with a pin type cage according to claim 1, wherein the groove portion has a flat bottom portion with which the tip of the fixing member comes into surface contact.