JPH0740735Y2 - Thrust traces for thrust roller bearings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of use) A thrust roller bearing (including a needle bearing) according to the present invention is a thrust race that is mounted on a rotating part of an automobile such as a transmission to support a thrust load. It is sandwiched between the roller bearing and a mating member such as a housing. Then, the rotation support by the thrust bearing is favorably performed.

(Prior Art) A thrust roller bearing is attached to a rotating portion of a transmission or the like to support a thrust load applied to a rotating shaft or the like. As a thrust roller bearing used for such an application, a structure having a structure as shown in, for example, FIG. 9 has been conventionally known.

The conventional thrust roller bearing shown in FIG. 9 is of a race-integrated type. It consists of two ring-shaped plate members 1 and 1 combined in a donut shape and a plurality of rollers 2 arranged in a radial direction. A cage 3 for holding 2 and a metal plate having a sufficient hardness are formed into an annular shape, and are provided so as to face the cage 3 so that the upper and lower surfaces of the plurality of rollers 2 and 2 come into contact with each other. Races 4a and 4b (the race is often provided only on one side of the cage 3).

Of the pair of races 4a, 4b, one end of a short cylindrical flange 5a formed on the outer peripheral edge of one race 4a is bent toward the outer peripheral edge of the cage 3. As a result, the bent edge 6 is formed. The engagement between the bent edge 6 and the outer peripheral edge of the cage 3 causes the rollers 2,
The retainer 3 which holds 2 and the race 4a are connected to each other while allowing relative rotation of each other.

Although not shown, when the other race 4b is fixedly connected to the cage 3, the inner peripheral edge portion of the short cylindrical flange 5b formed on the inner peripheral edge of the race 4b is retained. Three
The bent edge is formed by bending toward the inner peripheral edge of the. Then, this bent edge is engaged with the inner peripheral edge of the cage 3.

By the way, when mounting the thrust roller bearing with a race configured as described above in the recess 8 formed in the housing 7,
As shown in FIGS. 10 to 13, it is possible to form the reverse assembly preventing pieces 11 and 11 at three or more end edge portions of the flange 5a so as to prevent the assembly work from being carried out in the wrong mounting direction. Has been done.

The reverse assembly preventing pieces 11, 11 are formed by bending outwardly tongue pieces formed at equal intervals to each other at three or more positions on the edge of the flange 5a. When trying to assemble the race 4a into the recess 8 of the housing 7 from the opposite direction, the tip edges of the anti-reverse assembly pieces 11, 11 come into contact with the peripheral edge of the opening of the recess 8 to allow the race 4a to be in the recess 8. Can't be pushed into. Therefore, it is not necessary to assemble the thrust roller bearing in the opposite direction.

Although not shown, the tongue formed on the edge of the flange 5b of the other race 4b is bent inward to form a reverse assembly preventing piece, and the race 4b is provided with respect to the convex portion 10 provided on the shaft 9. Therefore, it is also performed so that it is not assembled in the opposite direction.

(Problems to be Solved by the Invention) However, in the case of the conventional thrust trace for thrust roller bearing configured as described above, there are the following points to be solved.

That is, in the case of the conventional thrust race, the bent edge 6 and the reverse assembly preventing piece 1 for permanently connecting the race 4a and the cage 3 to each other.
1 and 11 are formed in a continuous state. Therefore, the height h (FIGS. 10 and 13) from the base plate portion 12 of the race 4a to the tips of the reverse assembly preventing pieces 11 and 11 must be increased.

As a result, in order to prevent interference between the reverse assembly preventing pieces 11 and 11 and the outer peripheral edge of the other race 4b, it is necessary to reduce the outer diameter of the race 4b. The outer diameter also becomes smaller. Therefore, the load capacity of this thrust roller bearing becomes small.

Further, as a result of the bent edge 6 and the reverse assembly preventing pieces 11, 11 being continuous, the area of the lubricating oil flow passage in the outer peripheral portion of the space 13 surrounded by the pair of races 4a, 4b becomes narrow. Therefore,
Lubricating oil may not flow smoothly between the space 13 and the outsides of the races 4a and 4b, which may result in poor lubrication of the thrust roller bearing and other peripheral components.

The thrust roller bearing thrust race of the present invention eliminates any of the above-mentioned disadvantages.

(Means for Solving the Problems) The thrust roller bearing thrust thrust trace of the present invention is formed with a short cylindrical flange at the peripheral portion of a circular ring-shaped metal plate in the same manner as the above-mentioned conventional thrust trace. Opposite a thrust roller bearing, which is formed by bending a tongue piece provided at three or more end edge portions of the flange to form a reverse assembly preventing piece and holding a plurality of rollers arranged in a radial direction by a cage. Is provided.

In particular, in the thrust roller bearing thrust trace of the present invention, the portions of the tongues near the base end are substantially in the same cylindrical surface as the flange. The reverse assembly preventing piece is constructed by bending only the tip portion of the tongue piece.
Further, notches are formed in the end portions of the flange located on both sides of each of the reverse assembly preventing pieces.

(Operation) In the case of the thrust roller bearing thrust race of the present invention configured as described above, it is possible to reduce the height of the reverse assembly preventing piece by forming notches on both sides of the reverse assembly preventing piece. The result is that the peripheral edge portion of the other race and the reverse-assembly preventing piece do not easily interfere with each other. Therefore, the area of the other race can be made sufficiently large, and the load capacity of the thrust roller bearing can be made sufficiently large.

Further, the space portion where the thrust roller bearing exists and the outer portion of the race communicate with each other through the notches, so that the lubricating oil can smoothly flow between the two portions, and the thrust roller bearing and Good lubrication of other parts existing around.

Further, since a part of the edge of the race does not rub strongly against the surface of the member on which the race is mounted, wear of this member can be prevented and deterioration of durability of the thrust roller bearing due to generation of abrasion powder can be prevented. .

Furthermore, by providing the reverse assembly preventing piece, it is not difficult to separate the race from the member to which the race is attached, so that disassembling and repairing the mechanical device incorporating the thrust trace is not troublesome.

(Embodiment) FIGS. 1 to 6 show a first embodiment of the present invention. The thrust roller bearing 14 shown in FIG. 1 is configured by holding a plurality of rollers 2, 2 arranged in a radial direction by a cage 3. The thrust roller bearing 14 has a race 15 made of a metal plate having a sufficient hardness.
It is sandwiched between a and 15b. Of these, one race 15
A short cylindrical flange 16a is attached to the outer peripheral edge of a, and the other race
Short cylindrical flanges 16b are also formed on the inner peripheral edge of 15b.

The edge of the flange 16a formed on the outer peripheral edge of the one race 15a is bent inward in the diametrical direction to form a bent edge 17. Then, by making this bent edge 17 engageable with the outer peripheral edge of the cage 3, the rollers 2,
The retainer 3 holding 2 and the race 15a are fixedly coupled while allowing relative rotation of each other.

In addition, the reverse assembly preventing pieces 18, 18 which are bent outward in the diametrical direction and project from the outer peripheral surface of the flange 16a are formed at three positions of the edge portions of the flange 16a formed on the outer peripheral edge of the one race 15a. Is formed. Further, in the case of the thrust roller bearing thrust trace of the present invention, notches 19 and 19 are formed at the end edge portions of the flange 16a on both sides of the reverse assembly preventing pieces 18 and 18, respectively. That is, the tongue pieces are formed between the notches 19 formed in two pieces at three positions in the circumferential direction of the flange 16a, and the tip of each tongue piece is bent outward in the diametrical direction. Assemble prevention pieces 18 and 18. The portion of each of the tongues near the base end is located substantially in the same cylindrical surface as the flange 16a.

When the thrust roller bearing 14 having the thrust race of the present invention constructed as described above is assembled in the recess 8 (see FIG. 9) formed in the housing 7, the flange 16a is provided unless the assembly direction is properly regulated. The anti-reverse-assembly pieces 18, 18 protruding from the outer peripheral surface hit the peripheral edge portion of the opening of the recess 8 and the race 15a cannot be pushed into the recess 8. Therefore, the thrust roller bearing 14 with a race is installed in the recess 8
There is no possibility to assemble in the opposite direction.

The above-mentioned operation is similar to that of the above-mentioned conventional thrust roller bearing thrust trace. In particular, in the case of the thrust trace of the present invention, by forming cuts 19 and 19 on both sides of each anti-assembly member 18, 18, each anti-assembly member 18, 18 and the bending edge 17 are discontinuous. . Therefore, the bent edge
Regardless of the presence of 17, the reverse-assembly preventing pieces 18, 18 can be freely bent and formed, and the height of the reverse-assembly preventing pieces 18, 18 can be reduced.

As a result, it becomes difficult for the reverse-assembly preventing pieces 18 and 18 to interfere with the outer peripheral edge portion of the other race 15b. Therefore, the other race
By making the outer diameter of 15b large enough, this race 15b
Is sufficiently widened, and the length dimension of each roller 2, 2 is increased, so that the load capacity of the thrust roller bearing 14 can be sufficiently increased.

Also, the thrust roller bearing is surrounded by a pair of races 15a and 15b.
A space 13 portion in which 14 exists and the outer portion of each race 15a, 15b communicate with each other through each of the notches 19,19. Therefore, the lubricating oil is smoothly circulated between the both parts, and the lubrication of the thrust roller bearing 14 and other peripheral parts is improved.

Further, a part of the edge of the race 15a does not rub strongly against the inner peripheral surface of the recess 8 formed in the housing 7, which is the surface of the member on which the race 15a is mounted. That is, thrust roller bearing
In the assembled state of 14, the tip edges of the respective reverse assembly preventing pieces 18, 18 do not come out of the recess 8 and rub against the inner peripheral surface.
Therefore, it is possible to prevent wear of the inner peripheral surface and prevent deterioration of the durability of the thrust roller bearing 14 due to generation of wear powder.

Furthermore, by providing the reverse assembly preventing pieces 18, 18, the race 15a,
Since it does not become difficult to separate from the housing 17 which is a member to which the race 15a is attached, disassembly and repair of the mechanical device incorporating the thrust trace is not troublesome.
In addition, notches 19 formed on both sides of each reverse assembly preventing piece 18, 18,
As the shape of 19, various shapes such as a rectangular shape as shown in FIGS. 4 to 6, a U shape as shown in FIG. 7 or a semicircular shape as shown in FIG. 8 should be adopted. Can be done.

(Effect of the Invention) Since the thrust roller bearing thrust race according to the present invention is constructed and operates as described above, it is possible to reduce the height dimension from the base plate portion of the race to the tip of the anti-assembly member. It becomes difficult for the anti-reassembly member and the edge of the other race to interfere with each other. Therefore, not only can the area of the other race be made sufficiently large to increase the load capacity of the thrust roller bearing, but also the area of the lubricating oil flow passage can be secured sufficiently to ensure that the thrust roller bearing and surrounding Can be fully lubricated.

In addition, since the presence of the reverse-assembly preventing piece does not easily cause abrasion powder or troublesome disassembly and repair work, it is possible to realize a mechanical device having excellent durability and easy maintenance.

[Brief description of drawings]

1 to 6 show a first embodiment of the present invention. FIG. 1 is a sectional view showing a state of being assembled to a thrust roller bearing, FIG. 2 is a plan view of the same, and FIG. 3 shows only a thrust trace. FIG. 4 is a plan view taken out and FIG. 4 is a sectional view taken along line AA of FIG.
FIG. 5 is a side view as seen from below in FIG. 3, FIG. 6 is an enlarged view of part B in FIG. 5, and FIGS. 7 to 8 show second to third embodiments of the present invention. Similar drawings, FIG. 9 is a sectional view showing a first example of a conventional thrust roller bearing with a race, FIG. 10 is a sectional view showing the same, and FIG. 11 is a plan view showing an example of a conventional thrust trace. Fig. 12 and Fig. 12 are side views from the bottom of Fig. 11,
FIG. 13 is a sectional view taken along line CC of FIG. 1: plate material, 2: roller, 3: cage, 4a, 4b: race, 5a, 5b: flange, 6: bent edge, 7: housing, 8: recess, 9: shaft,
10: convex part, 11: anti-assembly member, 12: substrate part, 13: space, 14: thrust roller bearing, 15a, 15b: race, 16a, 16b: flange, 17: bent edge, 18: anti-assembly member , 19: Notch.

Claims (1)

[Scope of utility model registration request] 1. A reverse cylinder-preventing piece is formed by forming a short cylindrical flange on the periphery of a circular metal plate and bending a tongue piece provided at three or more end edge portions of the flange. In a thrust roller bearing thrust trace provided to face a thrust roller bearing formed by holding a plurality of rollers arranged in a radial direction by a cage, the proximal end portion of each of the tongues is It exists substantially in the same cylindrical surface as the flange, and the anti-reverse-assembly prevention piece is configured by bending only the tip of the tongue piece. Thrust traces for thrust roller bearings, characterized by the fact that a notch is formed in the part where they are located.