JP2009297830A - Apparatus and method for attaching thrust roller bearing race - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus and a method for attaching a thrust roller bearing race, capable of avoiding troublesome installing work to a hollow shaft 11 or the like even if a metal plate having a large thickness dimension is used for a race 4d and completely preventing the race 4d from dropping off after the installing work. <P>SOLUTION: Each of the locking protrusion pieces 14, 14 is formed at a front edge of a supporting tubular part 9a constituting the race 4d. Filling slots 18, 18 for passing the locking protrusion pieces 14, 14 are formed between a locking recess groove 16 formed on an inner-peripheral surface of the hollow shaft 11 and an end face 17 of the hollow shaft 11. Under a state where the locking protrusion pieces 14, 14 are inserted up to a position matching with the locking recess groove 16 through the filling slots 18, 18, the race 4d is rotated relative to the hollow shaft 11 to deviate the locking protrusion pieces 14, 14 from the filling slots 18, 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a thrust with a race for mounting on an electrical component such as an automobile transmission, a compressor for a car air conditioner, or a rotation support part of various machines for general industry, and for supporting a thrust load applied to the rotation support part. The present invention relates to improvements in roller bearings. The thrust roller bearing described in the present specification and claims includes a thrust needle bearing using a roller (needle) having a larger axial length (a larger aspect ratio) than a diameter.

  A thrust roller bearing with a race is mounted on a rotation support portion of various machines such as an automobile transmission. For example, in the case of a transmission for an automobile, a thrust roller bearing with a race is mounted between a step portion provided on the rotation shaft and an axial end surface of a gear disposed around the rotation shaft. The rotation shaft and the gear can be rotated relative to each other while the thrust load applied between the gear and the gear is supported. In order to improve the assemblability of such a thrust roller bearing with a race, a structure for locking the race with a mating member has been conventionally known as described in Patent Documents 1 and 2, for example. . 10 to 11 show conventional structures described in Patent Documents 1 and 2.

  First, FIG. 10 shows a structure described in Patent Document 1 as a first example of a conventional structure. The race thrust roller bearing 1 includes a cage 2, a plurality of rollers 3 and 3, and a race 4. Among these, the cage 2 is formed into an annular shape by bending a metal plate, and is provided with a plurality of pockets 5 radially arranged (arranged radially) at a plurality of circumferential positions. 5 is provided. The rollers 3 and 3 are held in the pockets 5 and 5 so as to roll freely. The race 4 is formed by bending a metal plate. An annular race portion 6 for rolling contact of the rolling surfaces of the rollers 3 and 3 and the race portion 6 are provided. A cylindrical flange portion 7 is provided which is bent from the outer peripheral edge to the side where the rollers 3 and 3 are disposed.

  Further, the cage 2 and the race 4 are prevented from being separated based on the engagement between the engaging portion 8 formed by bending the leading edge of the flange portion 7 toward the inner diameter side and the outer peripheral edge of the cage 2. ing. In addition, a support tube portion 9 that is bent to the opposite side of the flange portion 7 in the axial direction is formed on the inner peripheral edge portion of the race 4. Furthermore, locking projections 10 are formed at a plurality of locations in the circumferential direction on the outer peripheral surface of the support cylinder 9. On the other hand, a locking concave groove 12 is formed over the entire circumference on the inner peripheral surface of the end of the hollow shaft 11, which is a counterpart member to which the thrust roller bearing with race 1 is to be mounted. In order to mount the thrust roller bearing with race 1 on the hollow shaft 11, the support tube portion 9 is fitted into the end of the hollow shaft 11, and the locking protrusions 10 are inserted into the locking grooves. 12 is engaged. In this state, the thrust roller bearing with race 1 is assembled to the hollow shaft 11 so as not to be inadvertently separated. Therefore, it is possible to easily assemble a rotary machine such as a transmission.

  Next, FIG. 11 shows a second example of the conventional structure described in Patent Document 2. The thrust roller bearing with race 1a of the second example includes a cage 2a, a plurality of rollers 3, 3, and a pair of races 4a, 4b. Then, as in the case of the first example described above, a cylindrical flange portion provided on the outer peripheral edge portion of the race 4a to prevent separation of the one race 4a (to the right in FIG. 11) and the cage 2a. This is illustrated by a locking portion 8 formed at the tip edge of 7a. On the other hand, the locking projections 10a are formed at a plurality of locations in the circumferential direction on the inner peripheral surface of the flange portion 7b formed on the inner peripheral edge portion of the other race 4b (left side in FIG. 11). On the other hand, a locking groove 12a is formed over the entire circumference in a portion close to the step surface 19 on the outer circumferential surface of the shaft member 13, which is a counterpart member to which the thrust roller bearing with race 1a is to be mounted. In order to attach the thrust roller bearing with race 1a to the shaft member 13, the flange portion 7b is externally fitted to the shaft member 13, and the locking protrusions 10a are engaged with the locking grooves 12a. Let In this state, the thrust roller bearing with race 1a is assembled to the shaft member 13 in a state where it is not inadvertently separated, so that assembly work of a rotary machine such as a transmission can be easily performed.

  In the case of the first and second examples of the conventional structure shown in FIGS. 10 to 11 as described above, ensuring durability in a state where the rigidity of the portion backing up the races 4 and 4b is low and reducing the manufacturing cost. It is difficult to achieve both. The reason for this is as follows. First, in the case of the conventional structure shown in FIGS. 10 to 11, each of the locking protrusions 10 and 10 a is formed at the intermediate portion in the axial direction of the support cylinder portion 9 and the flange portion 7 b. It is difficult to use a metal plate having a large thickness as the metal plate constituting 4b. That is, the metal plates constituting each of the races 4 and 4b use hard iron-based metals such as bearing steel, carbon steel, and case-hardened steel in order to support the thrust load repeatedly applied from the rollers 3 and 3. There is a need. In the case of such a hard iron-based metal, when the thickness dimension is increased, it becomes difficult to engage the locking protrusions 10 and 10a with the locking grooves 12 and 12a. That is, when the races 4 and 4b are mounted on the hollow shaft 11 and the shaft member 13, the locking projections 10 are elastically deformed in the radial direction while the support cylinder portion 9 or the flange portion 7b is elastically deformed. 10a needs to be engaged with the locking grooves 12, 12a. If the thickness dimension is increased, this operation becomes troublesome.

  On the other hand, as shown in FIG. 12A, the support cylinder 9 formed on the inner peripheral edge of the race 4c is simply fitted into the hollow shaft 11 from above, or (B) of FIG. ), The support cylinder portion 9 of the race 4c coated with grease, petroleum jelly, or the like is also fitted into the hollow shaft 11 from below. According to such a method, even if the thickness dimension of the metal plate constituting the race 4c is increased, the assembly work of the race 4c is not troublesome. However, in the case of the conventional method shown in FIGS. 12A and 12B, after assembling the race 4c to the hollow shaft 11, before assembling the hollow shaft 11 and other shaft members, This race 4c is easy to drop off. If a transmission, a compressor for a car air conditioner, or the like is assembled in a state where the race 4c is dropped, a serious failure may be caused.

German Patent Application No. 10227377 US Pat. No. 5,647,675

  In view of the circumstances as described above, the present invention does not bother assembly work even if a metal plate having a large thickness is used, and can reliably prevent the race from falling off after assembly. Invented to realize the mounting method.

  The thrust roller bearing race mounting apparatus and mounting method according to the present invention constitutes a thrust roller bearing installed between axial end surfaces of a pair of members that are provided in a state of being opposed to each other in the axial direction and relatively displaced. A race composed of an annular race portion and a cylindrical support tube portion provided at the peripheral edge of the race portion, and the support tube portion on the axial end surface of one of the two members. It attaches by making it fit in the cylindrical surface part provided in this one member.

  In the case of the thrust roller bearing race mounting device according to the first aspect of the present invention, the thrust roller bearing race mounting device is formed in a state of projecting in the radial direction toward the cylindrical surface portion at least at one end edge of the support cylinder portion. A locking groove formed in a portion of the cylindrical surface portion that extends in the axial direction from the axial end surface of the one member, and the locking groove and the one member. More than (preferably the same number of) insertion grooves as the number of the locking projection pieces communicating with the end face in the axial direction are provided. Then, the race is rotated with respect to the one member in a state in which the locking protrusion is advanced to a position aligned with the locking groove through the insertion groove, and the locking protrusion is inserted into the insertion groove. It is shifted from the groove.

  Further, in the case of the invention of the method for mounting the thrust roller bearing race according to claim 2, the race protrudes in the radial direction toward the cylindrical surface portion at least at one end edge of the support cylinder portion as the race. The thing provided with the latching protrusion formed in the state to use is used. In addition, as the one member, a locking groove formed in a portion of the cylindrical surface portion entering the axial direction from the axial end surface of the one member, and the locking groove and the one member A thing provided with the slot more than the number of the above-mentioned locking projection pieces (preferably the same number) which makes an axial end face communicate is used. And after making this latching protrusion come to the position which aligns with the said latching groove through this slot, the said race is rotated with respect to said one member, and the said latching protrusion is said slot Make fun of you.

According to the thrust roller bearing race mounting apparatus and mounting method of the present invention configured as described above, the assembly work may be troublesome even if a metal plate having a large thickness is used to configure the race. Moreover, it is possible to reliably prevent the race from falling off after assembly.
That is, it is not necessary to elastically deform the locking protrusions and the locking grooves in the process of engaging the locking protrusions and the locking grooves. The operation of engaging these can be easily performed by slightly rotating the race after the engaging protrusion is inserted into the groove and the axial position of the engaging protrusion is moved to a portion corresponding to the engaging groove.
And after this race is rotated and the phase with respect to the rotation direction of the said latching protrusion and the said insertion groove | channel is shifted, the said race will not drop carelessly from one member. For this reason, it is possible to prevent the occurrence of a serious failure by assembling various rotating machinery devices such as a transmission from which a race has dropped and a compressor for a car air conditioner.

[First example of embodiment]
1 to 6 show a first example of an embodiment of the present invention. This example shows the case where the race 4d in which the support cylinder portion 9 is provided on the inner peripheral edge portion of the annular race portion 6a is assembled to the end portion of the hollow shaft 11. Locking protrusions 14 and 14 are formed at two positions opposite to the diametrical direction of the distal end edge of the support cylinder portion 9 so as to protrude outward in the radial direction. On the other hand, on the inner peripheral surface of the center hole 15 of the hollow shaft 11, a locking groove 16 is formed over the entire circumference in a portion that slightly enters from the end opening. Insert grooves 18 and 18 are formed between two positions on the opposite side in the diameter direction of the locking groove 16 and the end surface 17 of the hollow shaft 11, respectively. Both the insertion grooves 18 and 18 are sized so as to pass through both the locking protrusions 14 and 14. Further, the axial position of the locking groove 16 is regulated as follows. That is, the both locking protrusions 14 and 14 are inserted into the center hole 15 through the both insertion grooves 18 and 18, and the race portion 6 a is abutted against the end surface 17, and the hollow shaft 11. With respect to the axial direction, the locking protrusions 14 and 14 and the locking groove 16 are aligned.

  When the race 6a is assembled to the end of the hollow shaft 11, the race 4d and the hollow shaft 11 are placed with the support cylinder portion 9 facing the center hole 15 as shown in FIG. Are arranged concentrically. Further, with respect to the circumferential direction of the race 4 d and the hollow shaft 11, the phases of the locking protrusions 14 and 14 and the insertion grooves 18 and 18 are matched. Next, from this state, the support cylinder portion 9 is pushed into the center hole 15 and the race portion 6a is pushed to the end surface 17 while the both locking projection pieces 14 and 14 are passed through the insertion grooves 18 and 18. Let it enter until it hits. Next, the race 4d is slightly rotated (for example, about 90 degrees), and the phases of the locking protrusions 14 and 14 and the insertion grooves 18 and 18 are made different from each other. As a result, the locking protrusions 14 and 14 are engaged with the locking groove 16 so that the support cylinder portion 9 does not come out of the center hole 15.

According to the mounting apparatus and mounting method of the thrust roller bearing race of this example configured as described above, the assembly work can be performed even if a metal plate having a large thickness is used as the metal plate for configuring the race 4d. There is no trouble, and it is possible to reliably prevent the race 4d from falling off after assembly.
That is, in the process of engaging the locking protrusions 14 and 14 with the locking groove 16, the hollow shaft 11 provided with the locking protrusions 14 and 14 and the locking groove 16 is elastically deformed. There is no need to let them. The operation of engaging the locking protrusions 14 and 14 with the locking groove 16 is performed by inserting the locking protrusions 14 and 14 through the insertion grooves 18 and 18 so that the race portion 6a is connected to the hollow shaft. 11 until it hits the end surface 17 of 11 and then the race 4d is rotated a little so that it can be done easily.

Then, after the race 4d is rotated to shift the phase in the rotational direction between the locking protrusions 14 and 14 and the insertion grooves 18 and 18, the race 4d is not connected to the hollow shaft 11. It will not drop off in preparation. For this reason, it is possible to prevent a serious failure from occurring in various rotating machines such as an automobile transmission and a car air conditioner compressor by combining the hollow shaft 11 from which the race 4d has dropped with other members.
If grease or the like is applied to the surface of the race portion 6a that faces the end surface 17, after engaging both the locking protrusions 14 and 14 with the locking groove 16, It can be reliably prevented that the race 4d rotates inadvertently and the phases of the locking projections 14, 14 and the insertion grooves 18, 18 are matched.

[Second Example of Embodiment]
7 to 9 show a second example of the embodiment of the present invention. This example shows the case where the race 4e in which the support cylinder portion 9a is provided on the inner peripheral edge of the annular race portion 6b is assembled to the end portion of the shaft member 13a. Locking protrusions 14a and 14a are formed at two positions on the diametrically opposite side of the tip edge of the support cylinder portion 9a so as to protrude radially inward. On the other hand, on the outer peripheral surface of the shaft member 13a, a locking groove 16a is formed over the entire circumference at a portion slightly away from the end surface 17a of the shaft member 13a toward the center side (upward in FIG. 7). Insertion grooves 18a and 18a are formed between two positions on the opposite side in the diameter direction of the locking groove 16a and the end surface 17a of the shaft member 13a, respectively. Both the insertion grooves 18a and 18a are sized so as to pass through both the locking protrusions 14a and 14a. Further, the axial position of the locking groove 16a is such that the locking protrusions 14a, 14a and the locking groove 16a are aligned with the race portion 6b abutting against the end surface 17a. Is regulated.

When the race 4e is assembled to the end of the shaft member 13a, as shown in FIG. 7, the race 4e and the shaft member 13a are arranged with the support cylinder portion 9a facing the shaft member 13a. Are arranged concentrically. Further, the phases of the locking protrusions 14a, 14a and the insertion grooves 18a, 18a are matched. Next, from this state, while passing both the locking protrusions 14a and 14a through the insertion grooves 18a and 18a, the support tube portion 9a is used as the end portion of the shaft member 13a, and the race portion 6b is used as the end surface 17a. Fit until it hits. Next, the race 4e is rotated a little to engage the locking protrusions 14a and 14a with the locking groove 16a, so that the support cylinder portion 9a does not come off from the end of the shaft member 13a. Like.
Even in this case, even if a metal plate having a large thickness is used as the metal plate for constituting the race 4e, the assembling work does not become troublesome. It can be reliably prevented from falling off.

Sectional drawing which shows the 1st example of embodiment of this invention in the assembled state. Sectional drawing shown in the state before assembling. The perspective view which shows the edge part of a hollow shaft. FIG. FIG. FIG. 6 is an enlarged perspective view of a portion C in FIG. 5. Sectional drawing which shows the 2nd example of embodiment of this invention in the state before assembling. The knee view of FIG. The ho-ho view. Sectional drawing which shows the 1st example of a conventional structure. Sectional drawing which shows the 2nd example. Sectional drawing (A) which shows the 3rd example, and sectional drawing (B) which shows the 4th example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a Thrust roller bearing with a race 2, 2a Cage 3 Roller 4, 4a-4e Race 5 Pocket 6, 6a, 6b Race part 7, 7a, 7b Flange part 8 Locking part 9, 9a Support cylinder part 10, 10a Locking protrusion 11 Hollow shaft 12, 12a Locking groove 13, 13a Shaft member 14, 14a Locking protrusion 15 Center hole 16, 16a Locking groove 17, 17a End face 18, 18a Groove 19 Step surface

Claims (2)

  Provided in the annular race part and the peripheral part of this race part that constitutes a thrust roller bearing installed between the axial end faces of a pair of members that are provided in a state of being opposed to each other in the axial direction. By fitting a race composed of the cylindrical support cylinder portion formed into the axial end surface of one of the two members and the support cylinder portion into the cylindrical surface portion provided on the one member. A mounting apparatus for a thrust roller bearing race to be attached, wherein at least one of the front end edges of the support cylinder portion is a locking projection piece formed in a state of projecting radially toward the cylindrical surface portion side, A locking groove formed in a portion of the cylindrical surface portion entering the axial direction from the axial end surface of the one member, and the locking groove and the axial end surface of the one member communicate with each other. Equipped with slots for more than the number of locking protrusions The race is rotated with respect to the one member in a state where the locking protrusion is advanced to a position aligned with the locking groove through the insertion groove, and the locking protrusion is inserted into the insertion groove. A device for attaching a thrust roller bearing race.   Provided in the annular race part and the peripheral part of this race part that constitutes a thrust roller bearing installed between the axial end faces of a pair of members that are provided in a state of being opposed to each other in the axial direction. By fitting a race composed of the cylindrical support cylinder portion formed into the axial end surface of one of the two members and the support cylinder portion into the cylindrical surface portion provided on the one member. A method of attaching a thrust roller bearing race to be attached, wherein the race is a locking projection formed in a state of projecting in a radial direction toward the cylindrical surface portion at at least one end edge of the support cylinder portion. A locking groove formed in a portion of the cylindrical surface portion that enters the axial direction from the axial end surface of the one member is used as the one member. Groove and axis of this one member Use one with a groove more than the number of the locking protrusions that communicates with the opposite end surface, and let the locking protrusions enter a position that aligns with the locking grooves through this groove. Then, a method for attaching a thrust roller bearing race in which the race is rotated with respect to the one member to displace the locking protrusion from the insertion groove.

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