JPS5838651B2 - rolling bearing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rolling bearing in which a bearing body, such as a ball bearing or a roller bearing, and a rotating body or a non-rotating body are integrally fixed by caulking.

Generally, in the above-mentioned rolling bearing, the inner race fits and fixes the shaft, and the outer race is integral with a rotating body such as a wheel of various sizes or a non-rotating body to be fixed to the bearing, depending on the usage. It is fixed and formed.

Conventionally, the above-mentioned rolling bearings include those shown in Figs. 1 and 2, in which a total of eight balls C are placed between an inner race a and an outer race b in a cage. The interposed bearing body e is held at equal intervals in the circumferential direction by d,
The outer race b is fitted into the annular recess g of the rotating body or non-rotating body f, and the opening periphery g' of the annular recess g is caulked h. It is constructed by being fixed integrally.

However, according to conventional rolling bearings, balls C and rollers (
(not shown) is an even number such as 8, while the number of the crimps h is an even number such as 6 or 8 (6 in the illustrated example).

This is to make it easier to divide the entire circumference (360 degrees) when the balls C and the caulking h are arranged at equal intervals (equal angles) in the circumferential direction.

That is, the caulking h... is performed by a tool l as illustrated in FIG. On the end face of the cylindrical part j formed with a diameter corresponding to g', caulking blades k...
The number of caulking blades k of the tool i is an even number in order to facilitate the formation of the caulking blades k at equal intervals.

However, in a rolling bearing, forming the caulking h to integrally fix the bearing body e and the rotating body or non-rotating body f causes distortion in the rotating body or the non-rotating body f, To firmly fix both of the above,
The distortion of the caulking h should be, for example, about 5 to 7/1000 or more.

Therefore, caulking h... so as to satisfy the above fixation.
When the distortion of ・ is set, each caulking h of outer race b...
. . . The portions b' . . . facing the portions are each slightly deformed inward.

However, in general, rolling bearings have inner and outer races a and b.
For example, set the interval between 3 to 1871 mm to the diameter of ball C.
Since it is formed with a margin of about 000, the centers of balls c and c are on one side with respect to the center line 7-l' or mrn', which is the diametrical direction of the bearing connecting caulking h and h in Fig. 1. When the outer race b is in the biased position, rotation is performed smoothly without being affected by the deformation of the outer race b, considering the distortion and margin described above.

However, if the number of balls C and the number of caulking h are both even numbers, as shown in FIG.
It often happens that the centers of the two balls c' and c' are located on -'-n', and in the case of S, the balls c', The rotation of ball c' becomes unsmooth, producing track noise, or in low temperatures such as during the winter, the grease hardens, making it impossible to rotate, and ball c1 or the inner and outer races a
, b causes uneven wear, resulting in wear and tear, which has the disadvantage of significantly reducing durability.

Moreover, this problem becomes more significant as the load acting on the bearing increases.

Therefore, as a result of studies in view of the above-mentioned conventional drawbacks, the present invention has been developed by maintaining the number of balls or rollers and caulking in a relatively even number and odd number relationship, and fixing the bearing body and a rotating body or a non-rotating body by caulking. By configuring 2 on the same center line
The purpose is to avoid the alignment of two balls, etc. and two caulking parts, thereby obtaining smooth rotation without any trouble even if the caulking pressure is increased, and improving durability. It is something.

The present invention will be described below in detail based on an embodiment showing a ball bearing. In FIG. ) are held at equal intervals in the circumferential direction by a retainer 5 and are engaged with each other so as to be rotatable, as in the conventional example.

In the illustrated example, the rotating body or non-rotating body 6 that is integrally fixed with the bearing body 1 is a support member for fixing the outer race 3 of the bearing body 1 to the non-rotating part. Like the conventional example shown in the figure, it has a short cylindrical shape, and is provided with a recess 7 concentric with the outer periphery for fitting into the bearing body.

Here, the recess 7 is formed by enlarging the peripheral wall of the inner hole of the non-rotating body 6 (the part indicated by O in FIG. 2) concentrically, leaving an appropriate dimension at one axial end. The other end is opened, and at one end in the axial direction, that is, at a portion corresponding to the lower part of the recess 7, there is an annular stepped portion corresponding to the difference in inner diameter between the inner hole and the recess 7, as shown in FIG. As a result, one end of the outer race 3 in the bearing body 1 is supported in contact with the bearing body 1, and the depth of fitting of the bearing body 1 into the recess 7 is restricted, and this step and caulking described later , the outer race 3 is fixed integrally with the non-rotating body 6.

Further, the depth of the recess 7, that is, the length in the axial direction, is set to be thicker than the width of the outer race 3 by a necessary and sufficient dimension for caulking, as shown in FIG. ,
The inner diameter R is set to a size that allows the outer race 3 to be fitted as easily and tightly as possible with respect to the outer diameter r of the outer race 3.

Therefore, after fitting the bearing body 1 into the recess 7 of the non-rotating body 6, the opening periphery 7' of the recess 7 is crimped with the crimping tool l shown in FIG.
The outer race 3 is compressed in the axial direction using a tool i, and a caulking blade k provided on the tool i forms caulks 8 partially on the opening periphery 7' at equal intervals in the circumferential direction. fixed,
Although the bearing body 1 and the non-rotating body 6 are integrated, the number of crimps 8 formed at equal intervals in the circumferential direction is the same as that of the balls 4.
... is an even number, the number is an odd number (5 in the illustrated example), and when the number of balls 4 is an odd number, the number of crimps 8 is an even number. It goes without saying that a sufficient number of crimps 8 are formed so that the rotating body 6 and the outer race 3 are firmly integrated.

In the above configuration, a shaft (not shown) is attached to the inner race 2.
When the valve rotating body 6 is fixedly supported by a suitable member and the shaft is rotated, or conversely, the shaft is fixed and the non-rotating body 6 is rotated by one drive as a rotating body. Then,
The position of the caulking 8 with respect to the rotating and revolving balls 4 remains unchanged or moves depending on the above usage as a rolling bearing, but in any case, the positions of the caulking 8 are fixed or moved relative to the balls 4 which rotate and revolve. The positions of . . . and caulking 8 . . . change relative to each other.

However, ball 4... and caulking 8...
Since the number of is kept relatively even and odd,
Now, if we consider the embodiment shown in Fig. 4, ball 4...
If there is an even number of . Since ・ is an odd number, the caulking 8 is 1 with respect to the center line P-v.
Only one location will match; two locations will never line up at the same time.

Therefore, even if the portion of the outer race 3 facing the caulking 8 deforms inwardly, if the caulking is done to a strain of 5 to 7/1000 that can firmly fix the non-rotating body 6 and the outer race 3, Inner and outer race 2°3 and ball 4 allowance 3~1
At 8/1000, the balls 4, 4 rotate smoothly.

Also, contrary to the above, when the number of balls 4... is an odd number and the number of crimps 8... is an even number, the balls 4... rotation can be made smooth.

As explained above, according to the rolling bearing according to the present invention,
In a bearing body 1 having balls 4 or rollers interposed between the inner and outer races 2 and 3, and a rotating body or a non-rotating body 6, which are fitted together and integrated by caulking 8, the above-mentioned Since the outer race 3 and the rotating body or non-rotating body 6 are fixed by caulking so that the number of caulking 8 and the number of the balls 4, etc. are relatively even and odd, during one drive rotation. In this case, the two balls 4° 4 and the two caulking parts 8, 8 no longer coincide on the same center line, and therefore the rotation of the balls 4 or rollers can be made smoother, which not only reduces drive rotation noise but also reduces drive rotation noise. It is possible to cope with changes in the dimensions of each member due to temperature changes and changes in the concentration of grease, and can ensure smooth rotation especially during winter.

Furthermore, even if the caulking pressure is made larger than in the conventional case, rotation will not be hindered, so the bearing body 1, that is, the outer race 3, and the rotating or non-rotating body 6 can be firmly fixed to apply contact pressure. It is noteworthy that it can be used in areas that are subject to large loads.

[Brief explanation of drawings]

Figures 1 and 2 show examples of conventional rolling bearings, with Figure 1 being a front view, Figure 2 being a vertical side view, and Figure 3 being a perspective view showing an example of a tool for caulking. Figure, 4th
The figure is a front view showing one embodiment of a rolling bearing according to the present invention. 1...Bearing body, 2...Inner race, 3
...Outside race, 4...Ball, etc., 6.
... Rotating body or non-rotating body, 8... Caulking.

Claims (1)

[Claims] 1. In a bearing body in which a plurality of balls or rollers are interposed between inner and outer races, the bearing body is fitted onto a rotating body or a non-rotating body and fixed by caulking,
The outer race and the rotating body or the non-rotating body are fixed by caulking while maintaining the number of the balls or rollers arranged at equal intervals and the number of caulking parts in a relatively even and odd number relationship. A rolling bearing characterized by the following characteristics: