JPH0512494Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a roller bearing such as a flat roller bearing or a thrust roller bearing.

[Prior art]

As a cage for a roller bearing, there is a conventional cage as shown in FIG. This retainer consists of an annular plate 20
An annular slot 21 with a predetermined width equal to the roller length plus an axial clearance is cut on one side, and grooves 22 with a predetermined width equal to the roller diameter plus a rotational clearance are formed radially and at equal intervals on the other side. It is opened to a depth exceeding the bottom 23 of the annular slot 21, and a desired pocket window 24 is formed at the matching portion of both grooves 21 and 22. (Unexamined Japanese Patent Publication No. 52-
(Refer to Publication No. 85662)

[Problem that the invention attempts to solve]

By the way, in the cage described above, although the rollers are prevented from falling off from the radial pockets formed on one side, they do fall off from the annular grooves on the other side, causing problems in workability when assembling the bearing. On the other hand, there is a cage proposed in Utility Model Publication No. 36-2906 that prevents the rollers from coming off from both sides of the cage. In this retainer, the inner surface of the pocket is formed into a dogleg shape by two inclined walls, and the openings on both sides of the pocket are formed to have a width smaller than the diameter of the rollers to prevent the rollers from slipping out. However, in the above-mentioned retainer, it is necessary to set the width of the opening of each pocket to a required dimension, and therefore, there is a problem in that dimensional control is time-consuming and manufacturing is difficult. Furthermore, since it is necessary to store the roller in the pocket by pushing the circumferential surface of the roller into the pocket through the linear opening of the pocket in a linear contact state, there is a problem in that the opening and the circumferential surface of the roller are likely to wear out. Therefore, the object of this invention is to provide a roller bearing that prevents the rollers from falling off from the cage, is easy to manufacture, and does not require strain when pushing into the pockets of the rollers.

[Means to solve the problem]

In order to solve the above problems, this invention provides grooves with a width smaller than the roller diameter and a predetermined depth at regular intervals on one surface of the cage, and grooves with an opening width smaller than the roller length on the other surface. A dovetail groove that extends beyond the bottom of the roller and intersects with the groove is formed continuously with the groove, a roller holding pocket is formed at the matching part of both grooves, and both end surfaces of the roller are formed with the center protruding from the periphery. This is the configuration formed by.

【Example】

Hereinafter, embodiments of the present invention will be described in detail based on FIGS. 1 to 5. Figures 1 to 3 show an embodiment in which the roller bearing retainer of the present invention is applied to a flat roller bearing.
FIG. 1 is a perspective view, FIG. 2 is a partial sectional view of the pocket portion, and FIG. 3 is a partial side view. A groove 3 smaller than the diameter of the roller 2 and taking into account the clearance in the rolling direction of the roller 2 is provided on one surface of the strip material 1, and a groove 3 with an opening width smaller than the length of the roller 2 is provided on the other surface. A dovetail groove 5 extending beyond the bottom 4 of the roller 3 and intersecting the groove 3 is formed, and the matching portion of both grooves 3 and 5 forms a pocket 6 for holding the roller 2. Therefore, if the roller 2 falls off upward, as shown in FIG. 3, the difference A between the diameter of the roller 2 and the width of the groove 3, and if the roller 2 falls off downward, as shown in FIG.
Difference B between the length of the roller 2 and the inclined surface 7 of the dovetail groove 5
The rollers 2 are reliably held by the pockets 6. As shown in this embodiment, the end surface 8 of the roller 2 is formed into a spherical curved surface with the center protruding from the periphery as shown in FIG.
The roller 2 is stored in the pocket 6 with both ends pushed into the opening of the dovetail groove 12. In this case, since the end surface 8 of the roller 2 is spherical, the roller is pushed in in a point contact state, and there is no strain, and the end surface 8 enters inside the dovetail groove 12, preventing the roller from coming out. Prevented. 4 and 5 show an embodiment in which the present invention is applied to a thrust roller bearing, with FIG. 4 showing the top surface and FIG. 5 showing the bottom surface. This retainer has a diameter smaller than the roller 2 on one side of the annular plate member 10.
A radial groove 11 is formed taking into account the clearance in the rolling direction of the roller 2, and an annular dovetail groove 12 is formed on the other surface with an opening width smaller than the length of the roller 2 and extending beyond the bottom of the radial groove 11. It is. Similar to the embodiment described above, falling off of the roller 2 in the vertical direction is prevented by interference between the outer diameter and end surface of the roller 2 and the grooves 11 and 12, respectively.

【effect】

As explained above, the present invention has a groove with a width smaller than the roller diameter and a predetermined depth on one side, and an opening width smaller than the roller length on the other side that extends beyond the bottom of the groove and connects the groove. Since intersecting dovetail grooves are formed and roller holding pockets are formed at the matching portions of both grooves, the rollers are prevented from falling off in the vertical direction, and the rollers are reliably guided and held. Furthermore, since continuous dovetail grooves are formed in the retainer to prevent the rollers from slipping out, there is no need to control the dimensions of the openings for each pocket, which facilitates manufacturing. Furthermore, since both end surfaces of the roller are formed with surfaces that protrude from the center, the roller can be pressed in by point contact, which suppresses wear on the pocket opening and the roller surface, and the pocket formed by the dovetail grooves. This has the advantage that the end face of the roller fits in, reliably preventing the roller from slipping out.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a first embodiment of the present invention;
Fig. 2 is a partial sectional view of the same as above, Fig. 3 is a side view of the same as above, Fig. 4 is a top view showing the second embodiment of the present invention, Fig. 5 is a top and bottom view of the same, Fig. 6 is a conventional holding It is a perspective view showing a container. 2... Roller, 3... Groove, 5... Dovetail groove, 6... Pocket, 7... Inclined surface, 11... Radial groove, 12
...A circular dovetail groove.

Claims (1)

[Scope of utility model registration request] In a roller bearing in which rollers are housed in roller holding pockets formed in a cage, grooves with a width smaller than the roller diameter and a predetermined depth are provided at regular intervals on one surface of the cage, and grooves on the other surface are formed at regular intervals. A dovetail groove extending beyond the bottom of the groove and intersecting the groove with an opening width smaller than the roller length is continuously formed in the groove, and a pocket for holding the roller is formed at the matching part of both grooves, and A roller bearing characterized in that both end faces of the roller bearing are formed with surfaces whose center protrudes from the periphery.