JP2004308782A - Mounting structure of rolling bearing to shaft, and stopper member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure of a rolling bearing to a shaft capable of reducing the number of components in comparison with a conventional one, shortening the shaft, and shortening a machining time of the shaft. <P>SOLUTION: A retaining member 3 and a stopper member 4 are used to mount an inner ring 21 on the shaft 1. The stopper member 4 is composed of a cylindrical part 41 externally fitted to an outer peripheral face of the retaining member 3, an outward flange part 43 mounted at an axial one end side of the cylindrical member 41, and an inward flange part 42 mounted at the axial other end side of the cylindrical part 41. The outward flange part 43 has a part 43a recessed inward to a boundary side with the cylindrical part 41, and divided at equal intervals in the circumferential direction. A peripheral groove 21c is formed on an outer peripheral face of the inner ring 21. The recessed part 43a of the outward flange part of the stopper member 4 is locked in the peripheral groove 21c. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a structure for attaching a rolling bearing to a shaft, and a stopper member used for the structure.
[0002]
[Prior art]
FIGS. 6 and 7 show a conventional example of a mounting structure of a rolling bearing to a shaft. FIG. 6 is a cross-sectional view of the mounting structure, and FIG. 7 is a side view thereof (a view as seen from an arrow E). This conventional example is described in Patent Document 1 below as a “conventional axial positioning structure”.
[0003]
In this example, a small diameter portion 11 and a large diameter portion 12 are provided on the shaft 1, and a boundary surface 13 between the large diameter portion 12 and the small diameter portion 11 is formed on a surface perpendicular to the axial direction. The inner ring 21 of the rolling bearing 2 is fitted over the small diameter portion 11, and one end surface of the inner ring 21 is brought into contact with the boundary surface 13. Further, a circumferential groove 11a having a predetermined width is provided at a position of the small diameter portion 11 on the other end surface side of the inner ring 21. A holding member 3 obtained by dividing an annular body having a predetermined width into two in the circumferential direction is fitted into the circumferential groove 11a, and the other end surface of the inner race 21 is held by the holding member 3. FIG. 8 shows a side view in this state. FIG. 8 shows divided bodies 3 a and 3 b of the holding member 3.
[0004]
Further, a cover member 5 that covers an end surface and an outer peripheral surface of the holding member 3 opposite to the inner ring 21 is loosely fitted to the shaft 1. The circlip (ring-shaped fastener) 6 applies a force from the other end surface to the one end surface of the inner race 21 to the holding member 3 via the cover member 5. That is, the inner ring 21 is attached to a predetermined position in the length direction of the shaft 1 by pressing and holding the holding member 3 against the other end surface of the inner ring 21 with the circlip 6. A circumferential groove 11b into which the circlip 6 is fitted is also provided on the shaft 1.
The following Patent Document 2 describes a mounting structure of a gear to a shaft, in which a gear is inserted into a support shaft having a spline formed on the outer periphery, and the gear is thrust-stopped by a circlip inserted in a circumferential groove of the support shaft. Have been.
[0005]
[Patent Document 1]
JP 2001-200911 A [Patent Document 2]
JP-A-10-213206
[Problems to be solved by the invention]
However, in the above-described conventional example of the mounting structure of the rolling bearing to the shaft, it is necessary to form two circumferential grooves for the circlip and the holding member on the shaft, and to mount the shaft by the width of the cover member and the circlip. It needs to be longer. Here, if the shaft is lengthened, design restrictions are imposed. That is, the conventional example has room for improvement in terms of reducing the number of parts, shortening the shaft as much as possible, shortening the machining time of the shaft, and the like.
An object of the present invention is to provide a structure in which the number of parts is smaller than that of the conventional example, the shaft can be shortened, and the machining time of the shaft can be shortened as a mounting structure of the rolling bearing to the shaft.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the present invention relates to a position of a shaft in which an inner ring is fitted to a shaft in a state where movement in an axial direction is restricted on one end surface side of the inner ring, and the other end surface side of the inner ring. Is provided with a circumferential groove having a predetermined width, and a holding member composed of a plurality of members obtained by dividing an annular body having a predetermined width in the circumferential direction is fitted into the circumferential groove, and the other end surface of the inner ring is held by the holding member. The following structure (1) is provided in the mounting structure of the rolling bearing, in which the inner ring is mounted at a predetermined position in the longitudinal direction of the shaft, by the member and the stopper member that makes the plurality of members immovable in the circumferential direction. (3) A structure for mounting a rolling bearing on a shaft, characterized by the following (3).
[0008]
{Circle around (1)} The stop member includes a tubular portion fitted to the outer peripheral surface of the holding member, a first locking portion provided at one axial end of the tubular portion, and another axial end of the tubular portion. And a second locking portion provided on the side.
(2) A groove for locking the first locking portion is formed on the outer peripheral surface of the inner ring on the side where the holding member is arranged.
(3) The first locking portion is locked to the groove of the inner race, and the second locking portion is brought into contact with the end surface of the holding member. The inner ring is mounted so as to be immovable in the axial direction with respect to the shaft.
[0009]
According to the present invention, the inner ring is externally fitted to the shaft in a state where axial movement is restricted on one end surface side of the inner ring, and a circumferential groove having a predetermined width is formed at a position of the shaft on the other end surface side of the inner ring. A holding member composed of a plurality of members obtained by dividing an annular body having a predetermined width in the circumferential direction is fitted into the peripheral groove, and the other end surface of the inner ring is held by the holding member, and the holding member of the inner ring is disposed on the side. A groove is formed on the outer peripheral surface of the shaft, and the holding member and the stopper member that makes the plurality of members immovable in the circumferential direction, the inner ring is mounted at a predetermined position in the longitudinal direction of the shaft by the shaft of the rolling bearing. The present invention provides a stop member used in a structure for attaching to a stop member, characterized by the following (4).
{Circle around (4)} A cylindrical portion fitted on the outer peripheral surface of the holding member, a first locking portion locked in the groove of the inner ring, and a second locking contact with an end surface of the holding member. A first locking portion is provided at one axial end of the cylindrical portion, and a second locking portion is provided at the other axial end of the cylindrical portion.
[0010]
The present invention also includes a small-diameter portion and a large-diameter portion, and a boundary surface between the small-diameter portion of the large-diameter portion and the small-diameter portion is formed on a surface perpendicular to the axial direction. A circumferential groove having a predetermined width is provided at a position of the small diameter portion on the other end surface side of the inner ring while applying one end surface of the inner ring, and a holding member formed of a plurality of members obtained by dividing an annular body having a predetermined width in the circumferential direction is provided in the circumferential groove. The inner ring is held at a predetermined position in the longitudinal direction of the shaft by fitting the member and holding the other end surface of the inner ring by the holding member, and by the holding member and a stop member for disabling the plurality of members in the circumferential direction. The present invention provides a structure for mounting a rolling bearing on a shaft, characterized by the following (5) to (8).
[0011]
{Circle around (5)} The stop member has a tubular portion fitted to the outer peripheral surface of the holding member, an outward flange portion provided at one axial end of the tubular portion, and an axially opposite end portion of the tubular portion at the other axial end. And an inward flange provided.
{Circle around (6)} The outward flange portion has a shape in which it protrudes outward after being depressed inward on the boundary side with the cylindrical portion, and a slit extending in the axial direction from the outward flange portion to a middle portion of the cylindrical portion is formed. A plurality is formed in the direction.
{Circle around (7)} On the outer peripheral surface of the inner ring on the side where the holding member is arranged, a groove for locking the recessed portion of the outward flange portion is formed.
{Circle around (8)} The recessed portion of the outward flange portion is locked to the groove of the inner race, and the inward flange portion is brought into contact with the holding member. The inner ring is mounted so as to be immovable in the axial direction with respect to the shaft.
[0012]
The present invention also includes a small-diameter portion and a large-diameter portion, and a boundary surface between the small-diameter portion of the large-diameter portion and the small-diameter portion is formed on a surface perpendicular to the axial direction. A circumferential groove having a predetermined width is provided at a position of the small diameter portion on the other end surface side of the inner ring while applying one end surface of the inner ring, and a holding member formed of a plurality of members obtained by dividing an annular body having a predetermined width in the circumferential direction is provided in the circumferential groove. A member is fitted, the other end surface of the inner ring is held by the holding member, a groove is formed on the outer peripheral surface on the side where the holding member of the inner ring is arranged, and the holding member and the plurality of members are moved in the circumferential direction. A stop member for disabling the inner ring, the stop member being used in a structure for mounting the rolling bearing on the shaft in which the inner ring is mounted at a predetermined position in the longitudinal direction of the shaft, characterized by the following (9): Provide a member.
[0013]
{Circle around (9)} A cylindrical portion fitted to the outer peripheral surface of the holding member, an outward flange portion provided at one axial end of the cylindrical portion, and an inward flange provided at the other axial end of the cylindrical portion. The outward flange portion is shaped so as to protrude outward after being depressed inward on the boundary side with the cylindrical portion, and a slit extending in the axial direction from the outward flange portion to a middle portion of the cylindrical portion. Are formed in the circumferential direction.
The present invention also provides a transmission including the mounting structure of the present invention or the stop member of the present invention.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
FIG. 1 is a cross-sectional view illustrating a “structure for mounting a rolling bearing to a shaft” corresponding to an embodiment of the present invention. FIG. 2 is a view taken in the direction of the arrow A in FIG. FIG. 3 is a cross-sectional view showing one embodiment of the stop member of the present invention. FIG. 4 is a view on arrow B in FIG. FIG. 5 is a view on arrow C in FIG.
[0015]
As shown in FIG. 1, in the mounting structure of this embodiment, the shaft 1 has a small diameter portion 11 and a large diameter portion 12. A boundary surface 13 between the large diameter portion 12 and the small diameter portion 11 is formed on a surface perpendicular to the axial direction. The inner ring 21 of the rolling bearing 2 is externally fitted to the small diameter portion 11, and one end surface 21 a of the inner ring 21 is in contact with the boundary surface 13. The rolling bearing 2 includes an inner ring 21, an outer ring 22, a rolling element 23, and a retainer 24.
[0016]
Further, a circumferential groove 11a having a predetermined width is provided at the position of the small diameter portion 11 on the other end surface 21b side of the inner ring 21. The holding member 3 is fitted in the peripheral groove 11a. The holding member 3 is composed of divided bodies 3a and 3b in which an annular body having a predetermined width is divided into two in the circumferential direction (having a shape obtained by dividing an outer circumferential circle of the annular body into two parts by diameter). The divided bodies 3a and 3b constituting the holding member 3 are shown in FIG. The other end surface 21 b of the inner race 21 is held by the holding member 3. A force from the other end surface 21b of the inner race 21 toward the one end surface 21a is applied to the holding member 3 by the stopper member 4.
[0017]
As shown in FIGS. 1 to 5, the stopper member 4 includes a cylindrical portion 41 that is fitted to the outer peripheral surface of the holding member 3, and an outward flange portion provided at one axial end of the cylindrical portion 41 (the first flange portion). Locking portion) 43 and an inward flange portion (second locking portion) 42 provided at the other axial end of the cylindrical portion 41.
The outward flange portion 43 has a shape that protrudes outward after being depressed inward on the boundary side with the cylindrical portion 41. That is, the outward flange portion 43 has an inwardly depressed portion 43 a on the boundary side with the cylindrical portion 41. Further, a plurality of slits 43b extending in the axial direction from the outward flange portion 43 to the middle portion of the cylindrical portion 41 (for example, to the position "D" in FIG. 3) are formed in the circumferential direction. That is, as shown in FIG. 4, the outward flange 43 is a divided piece 43c divided at equal intervals in the circumferential direction.
[0018]
As shown in FIG. 1, a peripheral groove 21c is formed on the outer peripheral surface of the inner race 21 on the side where the holding member 3 is disposed. The circumferential groove 21c is shaped so that the recessed portion 43a of the outward flange portion of the stopper member 4 can be locked.
When the stop member 4 is attached, the rolling bearing 2 is externally fitted to the small diameter portion 11 of the shaft 1, and each of the divided bodies 3a, 3b of the holding member 3 is fitted to the circumferential groove 11a from the side facing each other. Is fitted toward the holding member 3 from the outward flange 43 side. At this time, the outward flange 43 returns to its original position after the split piece 43c is allowed by the slit 43b and spreads in the radial direction by elastic force.
[0019]
Therefore, the cylindrical portion 41 of the stopper member 4 is easily fitted to the holding member 3, and the concave portion 43 a of the outward flange portion 43 is easily locked in the circumferential groove 21 c of the inner race 21. Then, in this state, the inward flange portion 42 of the stop member 4 is pressed against the end surface (the other end surface) of the holding member 3. That is, in this state, the dimensions of the cylindrical portion 41 are set such that the inward flange portion 42 of the stop member 4 comes into contact with the end surface (the other end surface) of the holding member 3 with a sufficient pressing force.
[0020]
This stopper member 4 can be easily manufactured by press working using, for example, SPCC.
In the conventional example described with reference to FIGS. 6 to 8, the holding member 3, the cover member 5, and the circlip 6 are used to attach the inner race 21 to the shaft 1. The member 3 and the stopper member 4 are used. Therefore, according to the “mounting structure of the rolling bearing to the shaft” of this embodiment, the number of components can be reduced as compared with the conventional example described with reference to FIGS.
In this embodiment, since it is not necessary to provide a circumferential groove for the stopper member 4 on the shaft 1, the shaft 1 can be shorter than the conventional example described with reference to FIGS. Can be shortened.
[0021]
【The invention's effect】
As described above, according to the "mounting structure of the rolling bearing to the shaft" of the present invention, the number of parts is smaller than in the conventional example, the shaft can be shortened, and the machining time of the shaft can be shortened.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view illustrating a “structure for mounting a rolling bearing on a shaft” corresponding to an embodiment of the present invention.
FIG. 2 is a view taken in the direction of arrow A in FIG. 1;
FIG. 3 is a cross-sectional view showing one embodiment of a stop member of the present invention.
FIG. 4 is a view as viewed in the direction of the arrow B in FIG. 3;
FIG. 5 is a view taken in the direction of the arrow C in FIG. 3;
FIG. 6 is a cross-sectional view showing a conventional example of a “structure for mounting a rolling bearing to a shaft”.
FIG. 7 is a side view (E arrow view) of FIG. 6;
FIG. 8 is a side view (E arrow view) showing a state before the cover member 5 is attached in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft 11 Small diameter part 11a Peripheral groove 11b Peripheral groove 12 in which circlip is fitted Large diameter part 13 Boundary surface 2 Rolling bearing 21 Inner ring 21a One end face 21b of inner ring End face 21c of inner ring Cage 3 Holding members 3a, 3b Dividing body of holding member 4 Stopping member 41 Cylindrical portion 42 Inward flange portion (second locking portion)
43 Outward flange part (first locking part)
43a Inwardly depressed portion 43b Slit 43c Divided piece 5 of outward flange portion 5 Cover member 6 circlip

Claims (5)

The inner ring is fitted to the shaft with the axial movement restricted on one end surface side of the inner ring,
A circumferential groove of a predetermined width is provided at the position of the shaft on the other end surface side of the inner ring, and a holding member composed of a plurality of members obtained by dividing the annular body of the predetermined width in the circumferential direction is fitted into this circumferential groove, and the holding member is used. Hold the other end of the inner ring,
With the holding member and the stop member that makes the plurality of members immovable in the circumferential direction, the inner ring is attached to the shaft of the rolling bearing, which is attached to a predetermined position in the length direction of the shaft.
The stop member includes a tubular portion that is fitted to the outer peripheral surface of the holding member, a first locking portion provided at one axial end of the tubular portion, and a first locking portion provided at the other axial end of the tubular portion. And a second locking portion,
A groove for locking the first locking portion is formed on an outer peripheral surface of the inner ring on a side where the holding member is disposed,
The first locking portion is locked to the groove of the inner race, and the second locking portion is brought into contact with the end surface of the holding member. A structure for mounting a rolling bearing on a shaft, wherein the inner ring is mounted immovably in the axial direction with respect to the shaft. The inner ring is fitted to the shaft with the axial movement restricted on one end surface side of the inner ring,
A circumferential groove of a predetermined width is provided at the position of the shaft on the other end surface side of the inner ring, and a holding member composed of a plurality of members obtained by dividing the annular body of the predetermined width in the circumferential direction is fitted into this circumferential groove, and the holding member is used. Hold the other end of the inner ring,
A groove is formed on the outer peripheral surface on the side where the holding member of the inner ring is arranged,
A stop used in a structure for mounting a rolling bearing on a shaft, in which an inner ring is mounted at a predetermined position in a longitudinal direction of the shaft, by the holding member and a stop member for disabling the plurality of members in a circumferential direction. A member,
A tubular portion externally fitted to the outer peripheral surface of the holding member, a first locking portion locked in the groove of the inner race, and a second locking portion abutting on an end surface of the holding member; Wherein the first locking portion is provided at one axial end of the cylindrical portion and the second locking portion is provided at the other axial end of the cylindrical portion. A boundary surface between the small diameter portion and the small diameter portion of the large diameter portion includes a small diameter portion and a large diameter portion, and the inner ring is externally fitted to the small diameter portion of the shaft formed on a surface perpendicular to the axial direction, and one end surface of the inner ring is attached to the boundary surface. Hit
A circumferential groove having a predetermined width is provided at the position of the small diameter portion on the other end surface side of the inner ring, and a holding member including a plurality of members obtained by dividing an annular body having a predetermined width in the circumferential direction is fitted into the circumferential groove. Holds the other end of the inner ring,
With the holding member and the stop member that makes the plurality of members immovable in the circumferential direction, the inner ring is attached to the shaft of the rolling bearing, which is attached to a predetermined position in the length direction of the shaft.
The stopper member has a tubular portion fitted to the outer peripheral surface of the holding member, an outward flange portion provided at one axial end of the tubular portion, and an inner flange provided at the other axial end of the tubular portion. An outward flange portion, the outward flange portion has a shape that protrudes outward after being depressed inward on the boundary side with the cylindrical portion, and extends in the axial direction from the outward flange portion to a middle portion of the cylindrical portion. A plurality of extending slits are formed in the circumferential direction,
On the outer peripheral surface on the side where the holding member of the inner ring is arranged, a groove for locking the recessed portion of the outward flange portion is formed,
The recessed portion of the outward flange portion is locked to the groove of the inner ring, and the inward flange portion is brought into contact with the holding member. A structure for mounting a rolling bearing on a shaft, wherein the structure is mounted immovably in the axial direction with respect to the shaft. A boundary surface between the small diameter portion and the small diameter portion of the large diameter portion includes a small diameter portion and a large diameter portion, and the inner ring is externally fitted to the small diameter portion of the shaft formed on a surface perpendicular to the axial direction, and one end surface of the inner ring is attached to the boundary surface. Hit
A circumferential groove having a predetermined width is provided at the position of the small diameter portion on the other end surface side of the inner ring, and a holding member including a plurality of members obtained by dividing an annular body having a predetermined width in the circumferential direction is fitted into the circumferential groove. Holds the other end of the inner ring,
A groove is formed on the outer peripheral surface on the side where the holding member of the inner ring is arranged,
A stop used in a structure for mounting a rolling bearing on a shaft, in which an inner ring is mounted at a predetermined position in a longitudinal direction of the shaft, by the holding member and a stop member for disabling the plurality of members in a circumferential direction. A member,
A cylindrical portion externally fitted to the outer peripheral surface of the holding member, an outward flange portion provided at one axial end of the cylindrical portion, and an inward flange portion provided at the other axial end of the cylindrical portion. The outward flange portion is shaped so as to protrude outward after being depressed inward on the boundary side with the cylindrical portion, and a slit extending in the axial direction from the outward flange portion to a middle portion of the cylindrical portion has a circumferential direction. A plurality of stopper members are formed in the stopper member. A transmission comprising the mounting structure according to claim 1 or 3 or the stop member according to claim 2 or 4.

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