JP2007010091A - Bearing mounting adapter and bearing mounting structure using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable easy mounting work for a bearing while greatly reducing manufacturing cost. <P>SOLUTION: This bearing mounting adapter 1 is laid between a shaft 6 and the bearing 9. A main body 2 is approximately C-shaped in view from the front face from which its part is isolated. On the inner peripheral faces of adjacent ends 2a, 2b of an isolated portion 3 of the main body 2 and on the inner peripheral faces of others than the ends 2a, 2b, a plurality of inside protrusions 4A, 4B, 4C, 4D are provided symmetrically across the isolated portion 3 for abutting on the outer peripheral face of the shaft 9. On the outer face of the main body 2 at an almost central position among the inside protrusions 4A, 4B. 4C, 4D, outside protrusions 3A, 3B, 3C are provided for abutting on the inner peripheral face of the inner ring of the bearing 9. A guide inclined face 5 is formed on the outside protrusions 3A, 3B, 3C for guiding the bearing 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bearing mounting adapter used for mounting a bearing on a shaft and a bearing mounting structure using the same.

  The quality of the bearing fixed to the shaft greatly affects the performance and life of the bearing. Generally, when the bearing is fixed to the shaft, a clearance fit or an interference fit is used. The clearance fit makes it easy to incorporate the bearing and it is not necessary to increase the machining accuracy of the shaft, so it is widely used for light load bearing fixing in mass production equipment. Since it is not firmly fixed, there is a drawback that creep occurs and the bearing is easily damaged by fretting.

  On the other hand, in the interference fit, since the bearing is fixed to the shaft with a predetermined interference, the possibility of damage to the bearing due to fretting caused by creep is low. These operations require large-scale equipment such as a press or an electromagnetic induction heating device, and in order to avoid excessive load on the shaft and ensure a predetermined tightening margin, In addition, there is a problem that it is necessary to increase the machining accuracy of the shaft, which is expensive.

Further, in order to cope with the above-described problem, a bearing fixing device or an inner ring inner member including an outer sleeve that is tightly fitted to the inner peripheral surface of the inner ring of the rolling bearing and an inner sleeve that is fitted to the inner peripheral surface of the outer sleeve. A bearing adapter or the like has been developed that includes a sleeve having a tapered peripheral surface, a lock nut fitted to a male screw formed on one outer peripheral surface of the sleeve, and a lock nut washer.
JP-A-7-180727 Japanese Patent Laid-Open No. 2002-235761

  However, since the conventional bearing fixing device and the adapter for the bearing described above require an operation to operate a plurality of members according to a predetermined procedure, when used in an assembly line for mass production equipment, it takes time to install the bearing, In addition, there is a problem that the assembly operator has to work with a plurality of different parts in his / her hands.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing mounting adapter and a bearing mounting structure using the same, which can easily mount a bearing and have a single member structure.

  The present invention according to claim 1 is a bearing mounting adapter interposed between a shaft and a bearing, wherein the main body has a substantially C-shape when viewed from the front part of the main body is opened. A plurality of inner projections that contact the outer peripheral surface of the shaft are provided symmetrically with respect to the shaft outer peripheral surface on the inner peripheral surface of the adjacent end portion and the inner peripheral surface other than the end portion. Except for the adjacent inner protrusions on the inner peripheral surface of the end portion of the separated portion of the main body, an outer protrusion that abuts the inner peripheral surface of the inner ring of the bearing is provided on the main outer surface at a substantially central position between the other adjacent inner protrusions. A guide inclined surface for guiding the bearing is formed on the outer protrusion.

  The adapter according to the present invention can be used for mounting various bearings such as a rolling bearing and a sliding bearing.

  The material constituting the adapter is not particularly limited as long as the adapter can be elastically deformed, and various materials such as synthetic resin and metal can be used. In particular, synthetic resin such as polycarbonate is preferable, and reinforcing fiber is used. In some cases, mixed materials are used.

  According to a second aspect of the present invention, in the bearing mounting adapter according to the first aspect, the outer protrusion and the inner protrusion are formed to extend in the axial direction, and a guide inclined surface is formed on at least one end of both ends of the outer protrusion. It is characterized by being.

  The guide inclined surface is for facilitating a smooth mounting operation when the bearing is attached to the shaft, but the guide inclined surface may be provided at both ends of the outer protrusion.

  According to a third aspect of the present invention, in the bearing mounting adapter according to the first or second aspect, N number of outer protrusions and N + 1 number of inner protrusions are formed.

  According to a fourth aspect of the present invention, there is provided the bearing mounting adapter according to any one of the first to third aspects, wherein an upright portion for bearing stop is formed at one end of the outer protrusion. It is what.

  The present invention according to claim 5 is a bearing mounting adapter interposed between the shaft and the bearing, and the main body is substantially C-shaped from the front part of which is separated, and has a transverse cross section around the entire circumference. A convex arc-shaped portion is provided, the top of the convex arc-shaped portion in cross section is in contact with the inner peripheral surface of the inner ring of the bearing, and the entire circumference of the front and rear side edges or a predetermined portion is in contact with the outer peripheral surface of the shaft. It is what.

  The present invention according to claim 6 is a bearing mounting adapter interposed between the shaft and the bearing, and the main body is substantially C-shaped from the front part of which is separated from any one of the front and rear edges. A plurality of bent portions are formed at a predetermined interval on one edge, the top of the bent portion is in contact with the inner peripheral surface of the inner ring of the bearing, and the bent portion is formed among the front and rear side edges of the main body. The edge on the side is in contact with the outer peripheral surface of the shaft between adjacent bent portions, and the opposite edge to the side on which the bent portion is formed is in contact with the outer peripheral surface of the shaft. It is.

  The material constituting the adapter according to claims 5 and 6 may be any material as long as the adapter can be elastically deformed, and various materials such as synthetic resin and metal can be used, and metal is particularly preferable. .

  A seventh aspect of the present invention is a bearing mounting structure using the bearing mounting adapter according to any one of the first to third aspects and the fifth and sixth aspects, wherein the bearing mounting adapter is provided on the outer periphery of the shaft. A recessed groove to be fitted is formed, and a bearing contact step is provided at a position adjacent to the recessed groove, and the inner ring of the bearing is pressed into the shaft with the bearing mounting adapter fitted in the recessed groove. As a result, the bearing abuts against the bearing contact step, and the bearing inner ring inner circumferential surface abuts against the outer projection of the bearing mounting adapter and presses the outer projection in the axial direction of the shaft. The main body of the adapter is elastically deformed in the axial direction with the inner protrusion of the adapter in contact with the fulcrum as a fulcrum, and the bearing is fixed to the outer peripheral surface of the adapter.

  In any of the bearing mounting adapters according to the present invention, the outer protrusion of the adapter is basically formed on the inner peripheral surface of the inner ring only by moving the bearing to the upper side in a state of being mounted on the shaft. Since the bearing comes into contact with the shaft, the mounting operation of the bearing is simplified as compared with the conventional case. Therefore, it is possible to mount in a short time even in the mounting operation of the relatively light load bearing in the assembly line of the mass production equipment, and work efficiency can be improved.

  Further, according to the bearing mounting structure according to the present invention, it is not necessary to increase the accuracy of the adapter mounting groove formed on the adapter and the shaft, so that the machining cost can be greatly reduced as compared with the conventional case. Moreover, since the bearing is attached via the adapter of the present invention, noise can be reduced.

  Next, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to such embodiments, and various modifications can be made within the scope of the gist.

(Embodiment 1)
As shown in FIG. 1 and FIG. 2, reference numeral 1 denotes a synthetic resin bearing mounting adapter, and its main body 2 has a substantially C-shape when viewed from the front partly separated. The inner protrusions 4A, 4B, and 4C that are in contact with the outer peripheral surface of the shaft, which will be described later, are located at symmetrical positions on the inner peripheral surface of the adjacent end portions 2a and 2b in FIG.・ 4D is provided. Further, an outer peripheral surface of the main body 2 at each central position between the inner protrusion 4A and the inner protrusion 4D, between the inner protrusion 4B and the inner protrusion 4C, and between the inner protrusion 4C and the inner protrusion 4D, Outer protrusions 3A, 3B, and 3C that are in contact with each other are provided. The outer projections 3A, 3B, and 3C have a shape extending in the axial direction, and a bearing guide inclined surface 5 is formed at one end of both ends thereof.

  Next, an example of a bearing mounting structure using the bearing mounting adapter 1 of the present embodiment will be described. As shown in FIG. 3, a concave groove 7 to which the bearing mounting adapter 1 is mounted is formed on the outer peripheral surface of the shaft 6. A small groove 8 for mounting a stopper ring, which will be described later, is formed on the outer peripheral surface formed near the tip of the shaft 6.

  As shown in FIGS. 3 and 4, when the bearing 9 is attached to the shaft 6 using the bearing mounting adapter 1, first, the adapter 1 is first slightly expanded in the groove 7 of the shaft 6 and the opening 3 is slightly expanded. At this time, the guide inclined surfaces 5 of the outer protrusions 3A, 3B, and 3C on the outer peripheral surface of the adapter 1 are made to face the direction in which the bearing 9 enters (the tip side of the shaft 6).

  Next, the inner ring 12 of the bearing 9 is passed through the shaft 6, and the bearing 9 is further moved (press-fit) to the position of the concave groove 7 in the shaft 6. At this time, the inner peripheral surface of the inner ring 12 of the bearing 9 comes into contact with the outer protrusions 3A, 3B, 3C of the adapter 1 fitted in the concave groove 7, and the outer protrusions 3A, 3B, 3C are pressed in the axial direction. As a result, as shown in FIG. 5, the main body 2 of the adapter 1 bends in the axial direction of the shaft 6 with the inner protrusions 4A, 4B, 4C, and 4D in contact with the outer peripheral surface of the shaft 6 (elasticity). As a result, the bearing 9 is fixed to the shaft 6 via the adapter 1.

  As shown in FIG. 4, the outer ring 13 of the bearing 9 is attached to the housing 11, a sleeve 14 is mounted on the tip end side of the shaft 6 on both sides of the inner ring 12 of the bearing 9, and a stopper ring 15 is mounted in the small groove 8. Thus, the sleeve 14 is fixed. On the other hand, a movement of the bearing 9 in the axial direction is restricted by attaching a stopper ring or the like separately on the opposite side of the shaft 6 from both sides of the inner ring 12 of the bearing 9. In addition, as shown in FIG. 6, the diameter of the shaft 6 at a position adjacent to the concave groove 7 is increased, and a bearing contact step 16 is provided at the portion, and the inner ring 12 of the bearing 9 is provided at the step 16. In some cases, the movement of the bearing 9 in the axial direction is restricted in such a manner as to abut. Further, as a means for restricting the movement of the bearing 9, as shown in FIG. 7, a bearing stop standing portion 15 is provided on the other end side of the guide inclined surface 5 in the outer projections 3 </ b> A, 3 </ b> B, and 3 </ b> C of the bearing mounting adapter 1. When the bearing 9 is brought into contact with the upright portion 15 and its movement is restricted, the bearing contact step 16 in the shaft 6 can be omitted.

  (Embodiment 2)

  As shown in FIG. 8, the main body 22 of the bearing mounting adapter 21 has a substantially C shape from the front part of which is separated, and has a convex arc shape across the entire circumference. Abutting on the peripheral surface, the entire circumference of both front and rear side edges 22a and 22b of the main body 22 is in contact with the outer peripheral surface of the shaft.

  The method of using the bearing mounting adapter 21 of the present embodiment is the same as that of the adapter 1 of the first embodiment. However, in the adapter 21 of the present embodiment, the adapter 21 is fitted into the groove of the shaft, and then the bearing is mounted on the shaft. Is pressed against the inner peripheral surface of the inner ring of the bearing, and the top 23 is pressed in the axial direction of the shaft. The bearing 22 can be fixed by elastically bending the main body 22 in the circumferential direction and the axial direction of the shaft with 22b as a fulcrum.

  (Embodiment 3)

  As shown in FIG. 9, the main body 32 of the bearing mounting adapter 31 is substantially C-shaped from the front part of which is partly separated, and the cross-sectional linear portions 33 </ b> A and 33 </ b> B having a constant width are formed at both front and rear edge portions. In addition, a cross-section convex arc-shaped portion 34 is provided between the cross-section linear portions 33A and 33B. In addition, a pair of circular holes 34A and 34B corresponding to the front and rear sides are formed inside the linear sections 33A and 33B with a predetermined interval, and a notch 35 is formed between the corresponding circular holes 34A and 34B. .

  The method of using the bearing mounting adapter 31 of the present embodiment is the same as that of the adapter 21 of the second embodiment, but in the case of the adapter 31 of the present embodiment, the main body 32 is elastically bent in the axial direction when the bearing is mounted. It will be.

  (Embodiment 4)

  As shown in FIG. 10, the main body 42 of the bearing mounting adapter 41 is substantially C-shaped from the front part of which is separated and has seven corners 43, and has a cross-sectional convex arc shape over the entire circumference. The top portion 44 of the corner portion 43 is in contact with the inner peripheral surface of the inner ring of the bearing, and the central portions 46 of the straight front and rear side edges 45a and 45b between the corner portions 43 of the main body 42 are in contact with the outer peripheral surface of the shaft. ing.

  The method of using the bearing mounting adapter 41 of this embodiment is the same as that of the adapter 21 of the second embodiment. When the bearing is mounted, the main body 42 elastically bends in the outer peripheral direction and the axial direction of the shaft to fix the bearing. Can be done.

  (Embodiment 5)

  As shown in FIG. 11, the main body 52 of the bearing mounting adapter 51 is substantially C-shaped from the front part of which is separated, and is bent at a predetermined interval at one of the front and rear edges. 53, the bent portion 53 is in contact with the inner peripheral surface of the inner ring of the bearing. Among the front and rear side edges of the main body 52, an edge 54a on the side where the bent portion 53 is formed is adjacent to the bent portion. A central portion 55 between the three portions 53 is in contact with the outer peripheral surface of the shaft, and the entire periphery of the edge 54b opposite to the side where the bent portion 53 is formed is in contact with the outer peripheral surface of the shaft.

  The usage method of the bearing mounting adapter 51 of the present embodiment is the same as that of the adapter 21 of the second embodiment. However, in the bearing mounting adapter 51 of the present embodiment, the main body 52 is elastic in the circumferential direction when the bearing is mounted. The bearing can be fixed flexibly.

  The present invention can be widely used in equipment, devices, vehicles, and the like in which bearings are used.

3 is a perspective view of an adapter according to Embodiment 1. FIG. It is a front view of the adapter which concerns on the same embodiment. It is a perspective view which shows the state before attachment of an adapter and a bearing. It is a cross-sectional perspective view which shows the attachment state of the bearing by an adapter. It is a front view which shows the deformation | transformation state of the adapter at the time of bearing attachment. It is sectional drawing which shows the attachment structure of the bearing by an adapter. 6 is a perspective view showing another structure of the adapter according to Embodiment 1. FIG. 6 is a perspective view of an adapter according to Embodiment 2. FIG. 10 is a perspective view of an adapter according to Embodiment 3. FIG. 6 is a perspective view of an adapter according to Embodiment 4. FIG. FIG. 9 is a perspective view of an adapter according to a fifth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adapter 2 Main body 3 Opening part 4A * 4B * 4C * 4D Inner protrusion 5 Guide inclined surface 6 Shaft 7 Concave groove 9 Bearing 12 Bearing inner ring 13 Bearing outer ring

Claims (7)

  An adapter for mounting a bearing interposed between a shaft and a bearing, wherein the main body is substantially C-shaped when viewed from the front part of the main body, and the inner circumference of the adjacent end portion of the main body opening portion The inner peripheral surface other than the surface and the end portion is provided with a plurality of inner projections abutting on the outer peripheral surface of the shaft so as to be bilaterally symmetrical across the opening portion, and the inner peripheral surface of the end portion in the opening portion of the main body Except for the adjacent inner protrusions, outer main surfaces at substantially the center position between the other adjacent inner protrusions are provided with outer protrusions that contact the inner peripheral surface of the inner ring of the bearing, and the outer protrusions guide the bearings. A bearing mounting adapter with an inclined surface.   The bearing mounting adapter according to claim 1, wherein the outer protrusion and the inner protrusion have a shape extending in an axial direction, and a guide inclined surface is formed on at least one end of both ends of the outer protrusion.   The adapter for bearing attachment according to claim 1 or 2, wherein N number of outer protrusions are formed and N + 1 number of inner protrusions are formed.   The bearing mounting adapter according to any one of claims 1 to 3, wherein an upright portion for bearing stop is formed at one end of the outer protrusion.   A bearing mounting adapter interposed between the shaft and the bearing, wherein the main body is substantially C-shaped from the front part of which is separated, and is provided with a cross-sectional convex arc-shaped portion around the entire circumference. An adapter for mounting a bearing, wherein the top of the convex arc-shaped section in cross section is in contact with the inner peripheral surface of the inner ring of the bearing, and the entire circumference or a predetermined portion of both front and rear side edges of the main body is in contact with the outer peripheral surface of the shaft.   A bearing mounting adapter interposed between a shaft and a bearing, the main body of which is substantially C-shaped from the front part of which is separated, with a predetermined interval at one of the front and rear edges A plurality of bent portions are formed, the top portion of the bent portions is in contact with the inner peripheral surface of the inner ring of the bearing, and the edge on the side where the bent portions are formed among the front and rear side edges of the main body is an adjacent bent portion. A bearing mounting adapter in which the space is in contact with the outer peripheral surface of the shaft, and the edge opposite to the side on which the bent portion is formed is in contact with the outer peripheral surface of the shaft.   A bearing mounting structure using the bearing mounting adapter according to any one of claims 1 to 3 and claim 5 and claim 6, wherein a concave groove for fitting the bearing mounting adapter is formed on the outer periphery of the shaft. The bearing abutting step is provided at a position adjacent to the bearing, and the bearing is brought into contact with the bearing abutting step by press-fitting the inner ring of the bearing into the shaft with the bearing mounting adapter fitted in the groove. The inner circumferential surface of the bearing inner ring abuts the outer projection of the bearing mounting adapter and presses the outer projection in the axial direction of the shaft. A bearing mounting structure in which the main body of the adapter is elastically deformed in the axial direction as a fulcrum and the bearing is fixed to the outer peripheral surface of the adapter.

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