JP2017166614A - Assembly jig for conical roller bearing and its assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable an assembling work to be carried out to an outer ring 1 under a state in which several conical rollers 4 arranged in an annular form while holding a spacer-type cage 5 at an outer peripheral raceway surface 2a of an inner ring 2 are restrained in respect to the inner ring 2 at the time of assembly, and further to automatically remove an annular body 6 for restraining the spacer-type cage 5 and the conical rollers 4 against the inner ring 2 at the time of assembly.SOLUTION: An annular body 6 of which diameter can be expanded by a slit part 6b is installed at outer peripheries of large diameter side end parts of several conical rollers 4 arranged in an annular form while holding a spacer-type cage 5 at an outer raceway surface 2a of an inner ring 2 to cause the conical rollers 4 and the spacer-type cage 5 to be restrained against the inner ring 2 to assemble an inner assembly, thereafter the inner ring assembly is assembled into an outer ring 3 in its axial direction, and the annular body 6 is pushed out of an outer periphery of the large diameter side end parts of the conical rollers 4 by the large diameter side end surface of the outer ring 3 to remove the annular body 6.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an assembling jig used for assembling a tapered roller bearing in which a plurality of tapered rollers are arranged in an annular shape with a spacer type retainer sandwiched between an inner ring and an outer ring, and an assembling method thereof.

  As a retainer for a tapered roller bearing, there is an integrated press-formed product.

  A cage made of an integrated press-molded product requires a pressing mold at the time of production, and at the time of assembling a bearing, an assembly mold is used to expand the bottom for incorporating a tapered roller and It is necessary to perform a caulking process after incorporation of the tapered roller.

  On the other hand, there is a spacer type retainer as a retainer of the tapered roller bearing, and the spacer retainer is disposed so as to be sandwiched between the tapered roller and the tapered roller (Patent Document 1).

  This spacer type cage has the advantage that the die size at the time of producing the cage can be smaller than the cage made of an integrated press-molded product, and that the bottom spreading process and the caulking process are not required when assembling. is there.

JP 2007-64437 A

  However, since the spacer type cages are separated from each other, when an inner ring assembly in which a plurality of tapered rollers are arranged annularly on the outer raceway surface of the inner ring with the spacer type cage interposed therebetween is incorporated into the outer ring. The tapered roller and the spacer retainer are separated from the inner ring.

  For this reason, in assembling the tapered roller bearing, in order to prevent the spacer type cage from separating from the inner ring, in Patent Document 1, a protrusion is provided in the spacer type cage, and an annular assembly is provided on the projection. Side spacers are fitted and the spacer type cages arranged in an annular shape are restrained against the inner ring.

  The built-in side wheel used in this assembly is handled integrally with the tapered roller bearing even after assembly, which causes an increase in the mass of the tapered roller bearing.

  Therefore, the present invention includes an inner ring, an outer ring arranged concentrically on the outer periphery thereof, and a plurality of tapered rollers arranged in an annular shape with a spacer type retainer interposed between the inner ring and the outer ring. When assembling tapered roller bearings, multiple tapered rollers arranged annularly with spacer spacers on the outer raceway surface of the inner ring can be constrained to the inner ring and are automatically removed after assembly. Therefore, it is an object of the present invention to provide an assembly jig for a tapered roller bearing capable of suppressing an increase in mass of the tapered roller bearing.

  In order to solve the above-described problems, a tapered roller bearing assembly jig according to the present invention is composed of an annular body whose diameter can be expanded by a slit portion, and a spacer type cage is sandwiched between outer peripheral raceway surfaces of an inner ring. By attaching to the outer periphery of the large-diameter end of a plurality of tapered rollers arranged in an annular shape, the tapered roller and spacer retainer can be constrained to the inner ring, and the tapered roller and spacer constrained to the inner ring In the process of arranging the outer ring on the outer periphery of the cage in a concentric state with the inner ring, the outer ring is pushed by the outer ring to increase the diameter of the cut portion and is removed from the outer periphery of the large-diameter end of the tapered roller.

  The cut portion of the annular body can be formed in a stepped shape overlapping each other.

  The stepped shape can be provided so as to overlap in the radial direction or the axial direction.

  You may make it provide the hook nail | claw which mutually catches in the overlapping surface of the axial direction of the said cutting part.

  You may make it connect the cut part of the said annular body with an elastic body.

  The annular body can be formed of resin or metal.

The method of assembling the tapered roller bearing using the tapered jig for assembling the tapered roller bearing according to the present invention is as follows.
That is, a tapered roller comprising an inner ring, an outer ring arranged concentrically on the outer periphery thereof, and a plurality of tapered rollers arranged in an annular shape with a spacer-type cage interposed between the inner ring and the outer ring. In the method of assembling the bearing, an annular body whose diameter can be expanded by a slit portion is provided on the outer periphery of the large-diameter end of a plurality of tapered rollers arranged in an annular shape on the outer raceway surface of the inner ring with a spacer type cage interposed therebetween. After assembling the inner ring assembly with the tapered rollers and spacer retainer restrained against the inner ring, the inner ring assembly is assembled in the axial direction of the outer ring. At the end face, the annular body is pushed out from the outer periphery of the end portion on the large diameter side of the tapered roller, and the annular jig is removed.

  The outer diameter of the annular body at the time of diameter expansion is set smaller than the outer diameter of the bearing.

  According to this invention, on the outer peripheral raceway surface of the inner ring, the annular body whose diameter can be expanded by the split portion is mounted on the outer periphery of the large diameter side end of the plurality of tapered rollers arranged annularly with the spacer type cage interposed therebetween. After assembling the inner ring assembly that constrains the tapered roller and the spacer retainer to the inner ring, the inner ring assembly is assembled in the axial direction of the outer ring. The annular body can be pushed out from the outer periphery of the end portion on the large diameter side of the tapered roller and the annular jig can be removed, so that the mass of the tapered roller bearing is not increased. Further, since the outer ring can be assembled in the state of the inner ring assembly in which the tapered roller and the spacer retainer are restrained with respect to the inner ring, the assembly is easy.

These are the fragmentary sectional views of the tapered roller bearing of this invention. It is a disassembled perspective view which shows the state of an inner ring | wheel, a tapered roller, and a spacer retainer. FIG. 5 is a perspective view showing an inner ring assembly in which tapered rollers and spacer holders are annularly arranged on the inner ring raceway surface of the inner ring. It is a perspective view which shows the inner ring | wheel assembly which removed the annular body. It is a perspective view which shows the inner ring | wheel assembly which attached the annular body. It is a fragmentary sectional view of the inner ring assembly to which an annular body is attached. It is a fragmentary sectional view which shows the state which incorporates an inner ring assembly in an outer ring. It is a fragmentary sectional view showing a state where an inner ring assembly is built in an outer ring and an annular body is pushed out by the outer ring. It is a perspective view which shows the inner ring | wheel assembly which removed the annular body which concerns on other embodiment. It is a perspective view which shows the inner ring assembly which attached the annular body which concerns on embodiment of FIG. It is a perspective view which shows the inner ring | wheel assembly which removed the annular body which concerns on other embodiment. It is a perspective view which shows the inner ring assembly which attached the annular body which concerns on embodiment of FIG. It is a fragmentary sectional view which shows the state which incorporates the inner ring assembly of FIG. 12 in an outer ring. FIG. 13 is a partial cross-sectional view showing a state in which the inner ring assembly of FIG. 12 is assembled into the outer ring and the annular body is pushed out by the outer ring. (A) is a partial top view which shows the cut part of the annular body which concerns on embodiment of FIG. 11, (b) is a partial top view which shows the state which cancel | released the lock | rock of the catch claw of the cut part. It is a perspective view which shows the inner ring | wheel assembly which removed the annular body which concerns on other embodiment. It is a perspective view which shows the inner ring assembly which attached the annular body which concerns on embodiment of FIG.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  The tapered roller bearing 1 includes an inner ring 2 having an inner ring raceway surface 2a on an outer peripheral surface, an outer ring 3 having an outer ring raceway surface 3a on an inner peripheral surface disposed concentrically on the outer periphery of the inner ring 2, and these inner rings 2 And a plurality of tapered rollers 4 arranged annularly with a spacer type retainer 5 interposed therebetween.

  On the inner ring raceway surface 2a of the inner ring 2, a small collar portion 2b is formed on the small diameter side, and a large collar portion 2c is formed on the large diameter side.

  The spacer type retainer 5 has a column portion 5a in which guide surfaces of the tapered roller 4 are formed on both side surfaces, and a small-diameter side protruding portion 5b that is formed at one end of the column portion 5a and guides the small-diameter side end surface of the tapered roller 4. And a large-diameter protruding portion 5c that is formed at the other end of the column portion 5a and guides the large-diameter side end surface of the tapered roller 4, and is made of resin or carbon. It is steel.

  As shown in FIGS. 2 and 3, the tapered rollers 4 and the spacer type cages 5 are alternately arranged on the inner ring raceway surface 2 a of the inner ring 2, and the spacer type cages 5 sandwich the tapered rollers 4. The tapered roller 4 and the spacer type retainer 5 are separated from the inner ring 2 only by arranging the tapered roller 4 and the spacer type retainer 5 on the inner ring raceway surface 2 a of the inner ring 2.

  In order to assemble the tapered roller bearing 1, first, as shown in FIG. 3, the tapered roller 4 and the spacer type cage 5 are arranged on the inner ring raceway surface 2 a of the inner ring 2, and then the inner ring 2 is connected to the tapered roller 4. As shown in FIGS. 4 to 6, an annular body 6 is attached to the outer periphery of the end portion on the large diameter side of the tapered roller 4 so that the seat-type cage 5 does not come apart, and the tapered roller 4 and the spacer type cage are attached. An inner ring assembly in which 5 is restrained with respect to the inner ring 2 is formed.

  The annular body 6 is fitted on the outer periphery of the large-diameter side end of the plurality of tapered rollers 4 arranged in an annular shape with the spacer type cage 5 interposed therebetween, and the tapered roller 4 and the spacer type cage 5 are restrained with respect to the inner ring 2. It has an annular groove 6a in which the outer periphery of the end portion on the large diameter side of the tapered roller 4 is fitted on the inner peripheral surface.

  The annular body 6 is made of resin or metal, and is divided in the circumferential direction by a cut portion 6b so that the diameter can be increased.

  The cut portions 6b of the embodiment shown in FIGS. 4 and 5 are formed in a stepped shape that overlaps each other in the radial direction.

  Next, the inner ring assembly assembled as described above is fitted into the inner periphery of the outer ring 3 to assemble the tapered roller bearing 1 as shown in FIG.

  When the inner ring assembly is inserted into the inner circumference of the outer ring 3, the annular body 6 is pushed by the large-diameter side end surface of the outer ring 3 as shown by the white arrow in FIG. The tapered roller bearing 1 as shown in FIG. 1 is completed by spreading and automatically detaching from the outer periphery of the end portion on the large diameter side of the tapered roller 4.

  The outer diameter d1 of the annular body 6 is increased by the state shown in FIG. 7 from the state shown in FIG. .

  The outer diameter d1 of the annular body 6 is made small so as not to become larger than the outer diameter d2 of the outer ring 3 when the outer ring 3 is assembled in the expanded state.

  Next, FIG.9 and FIG.10 has shown another embodiment of the cutting part 6b of the annular body 6. FIG.

  The cut part 6b of the annular body 6 shown in FIGS. 9 and 10 is divided into two in the axial direction, and the divided part 6b divided into two is in a position shifted in the radial direction.

  Moreover, FIG.11 and FIG.12 is another embodiment with which the cut part 6b of the annular body 6 overlaps with an axial direction. In this embodiment, a catching claw 6c is formed on the overlapping surface in the axial direction of the cut portion 6b.

  The embodiment shown in FIG. 11 and FIG. 12 has the hook claw 6c formed in the axial direction, so when the outer ring 3 is pushed in and the annular body 6 is expanded and removed, as shown in FIG. It is necessary to remove the catch of the catch claws 6c.

  For example, as shown in FIG. 15 (a), when the engagement allowance of the catching claw 6c is A before the outer ring 3 is pushed in, the outer ring 3 is pushed in to remove the catching of the catching claw 6c. As shown in FIG. 15B, it is necessary to shift one of the cutting portions 6b in the axial direction by B.

  In the embodiment shown in FIGS. 11 and 12, in order to shift one of the cut portions 6b in the axial direction, a protrusion 6d for unlocking is provided on the side surface of the cut portion 6b of the annular body 6 on the outer ring 3 side, This protrusion 6d is pushed by the outer ring 3, so that the catching claw 6c is released as shown in FIG. 15 (b).

  Next, in the embodiment shown in FIGS. 16 and 17, the cut portion 6b of the annular body 6 is connected by an elastic body 6e such as rubber.

  In addition, the shape of the cutting part 6b of the annular body 6 is not limited to the above embodiment, Other shapes, such as V shape, may be sufficient.

1: Tapered roller bearing 2: Inner ring 2a: Inner ring raceway surface 2b: Small brim part 2c: Large brim part 3: Outer ring 3a: Outer ring raceway surface 4: Tapered roller 5: Spacer type cage 5a: Column part 5b: Small diameter side Projection 5c: Large-diameter side projection 6: Annular body 6a: Annular groove 6b: Cutting part 6c: Claw 6d: Protrusion 6e: Elastic body

Claims (8)

  Tapered rollers are mounted on the outer periphery of the large-diameter end of a plurality of tapered rollers that are annularly arranged on the outer raceway surface of the inner ring with a spacer-type cage sandwiched between the outer raceway surfaces of the inner ring. The spacer retainer can be restrained with respect to the inner ring, and the outer ring is pushed by the outer ring in the process of arranging the outer ring concentrically with the inner ring on the outer periphery of the tapered roller and the spacer retainer restrained with respect to the inner ring. An assembly jig for a tapered roller bearing, wherein the cutting portion is expanded and removed from the outer periphery of the end portion on the large diameter side of the tapered roller.   The tapered jig for assembling a tapered roller bearing according to claim 1, wherein the cut portions of the annular body are formed in a stepped shape overlapping each other.   3. The tapered roller bearing assembly jig according to claim 2, wherein the stepped shape is provided so as to overlap in a radial direction or an axial direction.   4. A tapered roller bearing assembly jig according to claim 3, wherein hooking claws that engage with each other are provided on the overlapping surface.   The tapered roller bearing assembly jig according to claim 1, wherein the cut portions of the annular body are connected by an elastic body.   The jig for assembling a tapered roller bearing according to any one of claims 1 to 5, wherein the annular body is made of resin or metal.   A tapered roller bearing comprising an inner ring, an outer ring arranged concentrically on the outer periphery thereof, and a plurality of tapered rollers arranged annularly with a spacer type retainer interposed between the inner ring and the outer ring. In the assembling method, an annular body whose diameter can be expanded by a slit portion is mounted on the outer periphery of the large diameter side end portions of a plurality of tapered rollers arranged in an annular shape with a spacer-type cage interposed therebetween on the outer peripheral raceway surface of the inner ring. After assembling the inner ring assembly that constrains the tapered roller and spacer retainer against the inner ring, the inner ring assembly is assembled into the outer ring, and when the inner ring assembly is assembled into the outer ring, the outer ring has an annular shape at the end face on the large diameter side. A method for assembling a tapered roller bearing, wherein the annular body is removed by extruding the body from the outer periphery of the end portion on the large diameter side of the tapered roller.   8. The method of assembling a tapered roller bearing according to claim 7, wherein an outer diameter of the annular body when expanding is smaller than a bearing outer diameter.

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