JPH0752972Y2 - Thrust rolling bearing with synthetic resin case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) A thrust rolling bearing with a synthetic resin case according to the present invention is provided in a suspension part of an automobile or the like, while supporting a load in a thrust direction applied to a rotating part. It is used to allow rotation of the rotating part.

(Prior Art) By providing thrust rolling bearings such as thrust ball bearings and thrust roller bearings in a rotating portion to which a thrust load is applied, such as a suspension portion of an automobile, while supporting the load in the thrust direction applied to the rotating portion, This rotation part is allowed to rotate.

BACKGROUND ART As is well known, thrust rolling bearings are formed in a circular ring shape, respectively, and a pair of race members formed with raceway surfaces on the surfaces facing each other and a plurality of rolling members provided between the raceway surfaces of both race members are freely rollable. And a member supporting one race member and a member supporting the other race member are allowed to rotate relative to each other with the rolling of the plurality of rolling members. I have to.

Further, in order to facilitate the work of mounting such a thrust rolling bearing on the rotating part, a synthetic resin case is mounted on the pair of race members in a state of enclosing a part other than the raceway surface of each race member. Things are being done.

Further, in French Patent Publication No. 2375484, as shown in FIG. 9, synthetic resin cases 2 and 3 mounted on a pair of race members 1 and 1 are prevented from being inadvertently separated from each other.
A device for facilitating handling of a thrust rolling bearing with a synthetic resin case is described.

That is, according to this conventional device, the hook pieces 4a, 4b hanging from both ends of the lower surface of one synthetic resin case 2 and the hook pieces 5a, 5b planted on the upper surfaces of both ends of the other synthetic resin case 3 are mutually connected. By engaging them, both synthetic resin cases 2 and 3 are prevented from separating from each other unless a strong force is applied.

Further, apart from the device described in French Patent Publication No. 2375484, the synthetic resin cases 2 and 3 attached to the pair of race members 1 and 1 are carelessly structured by the structure shown in FIG. Some of them are not separated.

In the case of the structure shown in FIG. 10, the hook piece 6 formed on the one synthetic resin case 3 and the inner peripheral edge of the one race member 1 are engaged with each other so that the synthetic resin case 3 and the one And the lower end portion of the hook piece 7 hanging from the outer peripheral portion of the lower surface of the other synthetic resin case 2 is engaged with the outer peripheral edge portion of the one race member 1. Thus, the pair of synthetic resin cases 2 and 3 are prevented from being separated carelessly. A retaining piece 8 is planted on the outer peripheral edge of one of the synthetic resin cases 3, and the inner peripheral surface of the retaining piece 8 is opposed to the outer peripheral surface of the hook piece 7, so that the hook piece 7 is a race member. The outer peripheral edge of No. 1 is set so as not to retract carelessly.

(Problems to be Solved by the Invention) However, in the case of the conventional thrust rolling bearing with a synthetic resin case configured and configured as described above, it was not always satisfactory in terms of manufacturing cost and the like.

That is, in the case of the structure shown in FIG. 9, not only is the implementation restricted by the existence of the patent right, but also the pair of synthetic resin cases 2 and 3 are provided with the hook pieces 4a, 4b, 5a and 5b, respectively. Since it is formed, it is unavoidable that the mold for injection molding the synthetic resin cases 2 and 3 becomes complicated, and accuracy is maintained unless a good (expensive) synthetic resin is used. It is difficult to do so, and the hook pieces 4a, 4b, 5a, 5b are liable to fail in engagement with each other.

Further, in the case of the structure shown in FIG. 10, it is inevitable that the mold for injection-molding the synthetic resin cases 2 and 3 is complicated, and a high quality and expensive synthetic resin must be used. However, it is difficult to maintain accuracy, and the engagement between the hook pieces 6 and 7 and the race member 1 is likely to be poor.

The thrust rolling bearing with a synthetic resin case of the present invention eliminates the above-mentioned inconvenience.

(Means for Solving the Problem) The thrust rolling bearing with a synthetic resin case of the present invention is formed in the shape of a circular ring, respectively, like the conventional thrust rolling bearing with a synthetic resin case, and is formed on the surfaces facing each other. A pair of race members that form raceway surfaces, a plurality of rolling elements provided between the raceway surfaces of both race members, and a state in which parts other than the raceway surfaces of both race members are fitted to each race member. It is composed of a supported synthetic resin case.

Further, in the thrust rolling bearing with case made of synthetic resin of the present invention, a sealing member made of a sealing material made of an elastic material and a metal core made of a metal plate for reinforcing the sealing material is used as one synthetic resin. It is fitted and supported on the peripheral surface of the case, and a bending locking portion is formed at the tip of the core metal, and the hook portion formed at the end of the other synthetic resin case and the bending locking portion are engaged. By combining them, the synthetic resin cases externally fitted and supported by the pair of race members are prevented from being separated from each other.

(Operation) When the thrust rolling bearing with a synthetic resin case of the present invention configured as described above supports the load in the thrust direction applied to the rotating portion while allowing the rotating portion to rotate, This is the same as the thrust rolling bearing.

Further, in the case of the thrust rolling bearing with the synthetic resin case of the present invention, the bending locking portion formed at the tip of the core metal and the hook portion formed at the end of the other synthetic resin case, The pair of synthetic resin cases function so as not to be separated carelessly.

In the thrust rolling bearing with the synthetic resin case of the present invention, the hook portion is formed only on the other synthetic resin case, and the hook portion is engaged with the bent locking portion formed on the core metal.
The mold for injection molding synthetic resin is relatively simple,
Moreover, compared to the case where the synthetic resin cases are engaged with each other, the accuracy required for the hook portion is low, and sufficient performance can be obtained even if a relatively inexpensive synthetic resin is used.

(Embodiment) Next, the present invention will be described in more detail with reference to the illustrated embodiment.

1 and 2 show a first embodiment of the present invention. FIG. 1 is a half sectional view and FIG. 2 is a sectional view taken along the line AA of FIG.

Reference numerals 9 and 9 denote a pair of race members each formed in a circular ring shape, and raceway surfaces 10 and 10 formed on surfaces facing each other. Each race member 9, 9 is a metal plate formed in advance in a circular ring shape. It is made by press molding. Therefore, the above-mentioned raceway surface
Convex parts 11 and 11 are formed on the side opposite to 10 and 10,
A press die is formed so that each of the protrusions 11 and 11 has a size that allows the protrusions 11 and 11 to enter the insides of the raceway surfaces 10 and 10 completely. Therefore,
After the race members 9 and 9 are press-molded, and after the raceway surfaces 10 and 10 are finished by machining,
A large number of lace members 9 and 9 can be overlapped with each other without a gap, and the heat treatment can be performed in a state where the large number of lace members 9 and 9 are strongly suppressed. Therefore, it is possible to improve the handleability of the lace members 9 and 9 during the quenching process, improve the space efficiency, and prevent distortion of the lace members 9 and 9 associated with the heating process.

Raceway surfaces of a pair of race members 9, 9 formed as described above
A plurality of balls 12, which are rolling elements, are provided between 10 and 10 so as to be rollable.

13 and 14 are synthetic resin cases, and the synthetic resin cases 13 and 14 are raceway surfaces 10 and 10 of the race members 9 and 9, respectively.
It is externally fitted and supported by each race member 9 in a state of enclosing other parts. On the bottom surface of the thick synthetic resin case 14, a recess 15 for thinning is formed to prevent deformation caused by injection molding.

Of the pair of synthetic resin cases 13 and 14, the inner peripheral edge of one synthetic resin case 13 has an inner peripheral surface of the case 13 and an outer peripheral surface of a shaft inserted inside the case 13. A seal member 16 is attached to seal the gap between and.

The seal member 16 includes a seal material 17 made of an elastic material such as oil resistant rubber, and a metal plate cored bar for reinforcing the seal material 17.
The core metal 18 is fitted into the inner peripheral edge of the synthetic resin case 13 so that the core 13 is supported on the inner peripheral edge portion of the case 13.

The base end portion (upper end portion in FIG. 1) of the cored bar 18 is bent outward to form an outward flange portion 19, and the lower surface of the outward flange portion 19 is formed on the upper surface of the synthetic resin case 13. The cored bar 18 is positioned by bringing them into contact with each other.

Further, the tip end portion (lower end portion in FIG. 1) of the cored bar 18 is formed with bent locking portions 20, 20 which are bent outward toward the raceway surface 10 of the race member 9. This bent locking part
As shown in FIG. 2, 20 and 20 are formed intermittently at the tip of the cored bar 18, and the inner peripheral edge of the synthetic resin case 13 that supports the cored bar 18 is shown in FIG. Such recesses 21, 21
Formed at the same pitch as the above-mentioned bending lock parts 20, 20,
The synthetic resin case 13 can be fitted into the case 18 from above.

Further, on the upper surface of the end portion on the inner peripheral side of the other synthetic resin case 14, a hook portion 22 having an upper end portion protruding inward is formed.
At the time of assembling the thrust rolling bearing with a synthetic resin case, by engaging the hook portion 22 with the bending engaging portions 20, 20, the outer fitting support is provided on the pair of race members 9, 9. The separated synthetic resin cases 13 and 14 are prevented from separating from each other.

The thrust rolling bearing with a synthetic resin case of the present invention configured as described above, while supporting the load in the thrust direction applied to the rotating portion, allows the rotating portion to rotate. Similar to the bearing, the relative rotation of the member supporting one synthetic resin case 13 and the member supporting the other synthetic resin case 14 is allowed with the rolling of the plurality of balls 12. .

Further, in the case of the thrust rolling bearing with a synthetic resin case of the present invention, the bending locking portions 20, 20 formed at the tip of the cored bar 18 fitted and supported on the inner peripheral edge of one synthetic resin case 13
And the pair of synthetic resin cases 13 and 14 are inadvertently separated from each other by the engagement with the tip of the hook portion 22 formed on the inner peripheral side upper surface of the other synthetic resin case 14. Prevent.

The thrust rolling bearing with a synthetic resin case of the present invention has the hook portion 22 formed only on the other synthetic resin case 14, and the hook portion 22 and the bent locking portions 20, 20 formed on the cored bar 18 are engaged. In order to form the synthetic resin cases 13 and 14,
The mold for injection molding synthetic resin is relatively simple,
Moreover, compared to the case where the hooks integrally formed in the synthetic resin case are engaged with each other, the accuracy required for the hooks 22 is low, and the performance is sufficient even if a relatively inexpensive synthetic resin is used. Can be obtained.

Next, FIG. 3 shows a second embodiment of the present invention.

In the case of the present embodiment, the core metal 18 of the seal member 16 is fitted to the outer peripheral edge of the lower synthetic resin case 14 from below,
A lower end portion of a hook portion 22 that hangs from a portion of the upper side of the synthetic resin case 13 near the outer periphery of the lower surface is engaged with a bending locking portion 20 that is bent inward from the upper end portion of the cored bar 18.

Other configurations and operations are the same as those in the above-described first embodiment, and therefore, the same reference numerals are given to the same parts,
A duplicate description will be omitted.

Next, FIG. 4 shows a third embodiment of the present invention.

In the first and second embodiments described above, the cored bar 18 is made of a synthetic resin case.
Prior to fitting to the peripheral portions of 13 and 14, the bent locking portion 20 was formed at the tip of the cored bar 18, whereas in the case of the present embodiment, the cored bar 18 is made of a synthetic resin case. After being externally fitted to the outer peripheral edge of 14, the tip end portion is bent inward to form the bent locking portion 20.

Therefore, in the case of this embodiment, it is not necessary to form the concave portion 21 (see FIGS. 1 to 3) in the outer peripheral edge portion of the synthetic resin case 14 for passing the bending locking portion 20.

Other configurations and operations are the same as those in the above-described first and second embodiments, and therefore, the same reference numerals are given to the same portions and duplicate description will be omitted.

Next, FIGS. 5 to 7 show fourth to sixth embodiments of the present invention.

While the balls 12 are used as the rolling elements in the above-mentioned first to third embodiments, in the case of the present embodiment, the rollers 23 are used, and the shapes of the race members 9, 9 are also adapted to this. Changing.

Other configurations and operations are the same as those in the above-described first to third embodiments, and therefore, the same reference numerals are given to the same portions and duplicate description will be omitted.

In each of the above-described embodiments, the tip end of the cored bar 18 is bent toward the raceway surface to form the bending locking portion 20, but the bending forming direction of the bending locking portion 20 is the eighth. As in the seventh embodiment shown in the figure, the direction opposite to the raceway surface can be used.

(Effect of the device) Since the thrust rolling bearing with a synthetic resin case of the present invention is constructed and operates as described above, the mold for injection molding the synthetic resin is relatively simple, and the synthetic resin case is also available. Compared with the case of engaging the hook parts integrally formed with each other, the accuracy required for the hook parts is low, and sufficient performance can be obtained even if a relatively inexpensive synthetic resin is used,
The manufacturing cost of thrust rolling bearings with synthetic resin cases can be reduced.

[Brief description of drawings]

1 and 2 show a first embodiment of the present invention, wherein FIG. 1 is a half sectional view, FIG. 2 is an AA sectional view of FIG. 1, and FIG. 3 is a second sectional view of the present invention. FIG. 4 shows the third embodiment, FIG. 5 shows the fourth embodiment, FIG. 6 shows the fifth embodiment, FIG. 7 shows the sixth embodiment, and FIG. FIG. 9 is a sectional view similar to FIG. 1 showing the same seventh embodiment, and FIG.
FIG. 10 is a sectional view similar to FIG. 1, showing the same second example. 1: Lace member, 2, 3: Synthetic resin case, 4a, 4b, 5a,
5b, 6, 7: hook piece, 8: restraining piece, 9: race member, 10: race surface, 11: convex portion, 12: ball, 13, 14: synthetic resin case, 15: concave portion, 16: sealing member , 17: Seal material, 18: Core bar, 19: Outward flange part, 20: Bend locking part, 21: Recessed part, 22: Hook part, 2
3: Around.

Claims (1)

[Scope of utility model registration request] 1. A pair of race members, each of which is formed in an annular shape and has raceway surfaces formed on opposite surfaces thereof, a plurality of rolling elements provided between the raceway surfaces of both race members, and both race members. In a thrust rolling bearing with a synthetic resin case consisting of a synthetic resin case fitted and supported by each race member while enclosing a portion other than the raceway surface, the elastic sealing material and this sealing material are used. A seal member composed of a metal plate cored bar for reinforcement is fitted and supported on the peripheral surface of one synthetic resin case, and a bending locking part is formed at the tip of the cored bar. By engaging the hook portion formed at the end of the synthetic resin case with the above-mentioned bent locking portion,
A thrust rolling bearing with a synthetic resin case, characterized in that the synthetic resin cases externally fitted and supported by the pair of race members are prevented from separating from each other.