JP2007120591A - Cam follower and roller follower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cam follower which can appropriately support a moment load or an induction thrust load caused by misalignment or the like, and can be used in an environment where an axial load is loaded thereon. <P>SOLUTION: The cam follower 21 comprises: an outer ring 22 whose outer diameter face is abutted with a track and whose inner diameter face has a raceway surface 22a; a stud 23 as an inner ring member whose outer diameter face has a raceway surface 23a; a plurality of rollers 24 disposed along raceway surfaces 22a, 23a of the outer ring 22 and the stud 23; and a cage 25 maintaining intervals between adjacent rollers 24. The rolling surface 24a of each roller 24 is formed into a projected curve, and each of the raceway surfaces 22a, 23a of the outer ring 22 and stud 23 is a concave-curved surface formed along each rolling surface 24a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cam follower or a roller follower that is used as a guide roller or the like and comes into contact with a track.

  As shown in FIG. 4, the conventional cam follower 11 includes an outer ring 12 having a raceway surface on an inner diameter surface, a stud 13 having a raceway surface on an outer diameter surface, and a plurality of rollers disposed between the outer ring 12 and the stud 13. 14 and a cage 15 that holds the interval between the adjacent rollers 14.

  The cam follower 11 is loaded with a moment load or an induced thrust load due to a cam follower mounting error or misalignment due to wear of the outer diameter surface of the outer ring 12 in contact with the track. Therefore, conventionally, for example, either the raceway surface of the outer ring 12 or the rolling surface of the roller 14 is subjected to crowning.

  However, when crowning is performed only on the raceway surface of the outer ring 12, if misalignment increases, the corners of the rollers 14 interfere with the raceway surface of the outer ring 12, causing edge stress at the contact portion and causing internal peeling. It becomes easy. On the other hand, when the crowning process is performed only on the rolling surface of the roller 14, the contact area with the raceway surface decreases, the contact surface pressure at the contact portion increases, and the behavior during rotation of the bearing becomes unstable. is there.

In order to solve this problem, Japanese Patent Application Laid-Open No. 11-101229 (Patent Document 1) discloses that a roller rolling surface is a convex curved surface and an outer ring raceway surface is a concave curved surface along the roller rolling surface. An example is disclosed. The publication describes that the corresponding concave and convex curved surface exhibits alignment, so that moment load and induced thrust load due to misalignment and the like can be absorbed.
JP-A-11-101229

  The cam follower 11 receives an axial load during rotation when an attachment error occurs. However, the roller bearing described in the publication cannot be used in an environment in which an axial load is applied because the raceway surface of the inner ring is a flat surface. Further, there is also a problem that the contact surface pressure at the contact portion increases between the roller whose rolling surface is a convex curved surface and the inner ring whose raceway surface is a flat surface. Furthermore, the same problem is seen also in a roller follower.

  Accordingly, an object of the present invention is to provide a cam follower and a roller follower that can appropriately support a moment load and an induced thrust load due to misalignment or the like and can be used even in an environment in which an axial load is applied.

  The cam follower according to the present invention is disposed along an outer ring whose outer diameter surface abuts on a track and has a raceway surface on an inner diameter surface, an inner ring member having a raceway surface on an outer diameter surface, and raceway surfaces of the outer ring and the inner ring member. The roller rolling surfaces are convex curved surfaces, and the raceways of the outer ring and inner ring member are concave curved surfaces along the roller rolling surfaces. Preferably, the rollers are arranged in a double row.

  By adopting the above-described configuration, the corresponding uneven curved surface exhibits alignment, so that it is possible to absorb a moment load or an induced thrust load due to misalignment or the like. Moreover, not only the outer ring raceway surface but also the raceway surface of the inner ring member is formed into a concave curved surface, so that it can be used even in an environment where an axial load is applied.

  The roller follower according to the present invention is disposed along an outer ring whose outer diameter surface abuts on a track and has a raceway surface on an inner diameter surface, an inner ring member having a raceway surface on an outer diameter surface, and the raceways of the outer ring and the inner ring member. The roller rolling surface is a convex curved surface, and the raceway surfaces of the outer ring and the inner ring member are concave curved surfaces along the roller rolling surface. Preferably, the rollers are arranged in a double row.

  The present invention can be expected not only to a cam follower but also to a roller follower in which the outer ring rotates in accordance with the rotation of a member that contacts the outer ring outer diameter surface.

  This invention absorbs moment load and induced thrust load due to misalignment etc. by making the rolling surface of the roller a convex curved surface and the raceway surface of the inner and outer rings as a concave curved surface along the rolling surface of the roller. In addition, a cam follower and a roller follower that can be used even in an environment in which an axial load is applied can be obtained.

  A cam follower 21 according to an embodiment of the present invention will be described with reference to FIG.

  The cam follower 21 is disposed along the outer race 22 having a raceway surface 22a on the inner diameter surface, the stud 23 as an inner ring member having the raceway surface 23a on the outer diameter surface, and the raceway surfaces 22a and 23a of the outer ring 22 and the stud 23. A plurality of rollers 24 and a cage 25 that holds the interval between the adjacent rollers 24 are provided.

  In this cam follower 21, a stud 23 is fixed to a housing (not shown), and the outer ring 21 rotates with a relative movement of a track (not shown) that abuts on the outer diameter surface of the outer ring 22.

  In the cam follower 21 configured as described above, the rolling surface 24a of the roller 24 is a convex curved surface, and the raceway surfaces 22a and 23a of the outer ring 22 and the stud 23 are concave curved surfaces along the rolling surface 24a, respectively.

  The cam follower 21 configured as described above can absorb moment load and induced thrust load due to misalignment or the like because the corresponding uneven curved surface exhibits alignment. Further, not only the raceway surface of the outer ring 22 but also the raceway surface of the stud 23 is formed into a concave curved surface, so that it can be used even in an environment where an axial load is applied.

  Next, a cam follower 31 according to another embodiment of the present invention will be described with reference to FIG.

  The cam follower 31 is basically the same cam follower as the cam follower 21 shown in FIG. 1, and has flanges 33 b that abut the end surfaces of the rollers 34 at both ends of the stud 31.

  This cam follower 31 can obtain the same effect as the cam follower 21 shown in FIG. 1, and also regulates the movement of the roller 34 in the axial direction by the flange 33b, so that it can be used even in an environment where a large axial load is applied. Is possible.

  In the cam followers 21 and 31 shown in FIGS. 1 and 2, the rollers 24 and 34 are arranged in a single row. However, the present invention is not limited to this, and the rollers may be arranged in a double row.

  For example, the cam follower 41 includes an outer ring 42 having a raceway surface 42 a on the inner diameter surface, a stud 43 as an inner ring member having a raceway surface 43 a on the outer diameter surface, and raceways 42 a and 43 a of the outer ring 42 and the stud 43. The cam follower includes a plurality of rollers 44 arranged in a row and a retainer 45 that holds a gap between adjacent rollers 44.

  In this cam follower 41, the rolling surface 44a of the roller 44 is a convex spherical surface, and the raceway surface 42a of the outer ring 42 is a concave spherical surface along the rolling surface 44a of the roller 44. Further, the raceway surface 43 a of the stud 43 has a shape combining concave spherical surfaces along the rolling surfaces 44 a of the double row rollers 44.

  In the embodiment shown in FIGS. 1 to 3, the stud is fixed to the housing (not shown), and the outer ring rotates with the relative movement of the track (not shown) in contact with the outer diameter surface. However, the present invention is not limited to this example, and the present invention can be applied to a roller follower in which the outer diameter surface of the outer ring is in contact with the track.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

  The present invention is advantageously used for cam followers and roller followers.

It is a figure which shows the cam follower which concerns on one Embodiment of this invention. It is a cam follower which concerns on other embodiment of this invention, Comprising: It is a figure which shows the example which provided the collar part in the both ends of a stud. It is a cam follower which concerns on other embodiment of this invention, Comprising: It is a figure which shows the example which has arrange | positioned the spherical roller in multiple rows. It is a figure which shows the conventional cam follower.

Explanation of symbols

  11, 21, 31, 41 Cam follower, 12, 22, 32, 42 Outer ring, 22a, 32a, 42a, 23a, 33a, 43a Raceway surface, 13, 23, 33, 43 Stud, 33b Saddle, 14, 24, 34 Roller, 44 Spherical roller, 24a, 34a, 44a Rolling surface, 15, 25, 35, 45 Cage.

Claims (4)

An outer ring whose outer diameter surface abuts on the track and has a raceway surface on the inner diameter surface;
An inner ring member having a raceway surface on the outer diameter surface;
A plurality of rollers arranged along the raceway surface of the outer ring and the inner ring member,
The rolling surface of the roller is a convex curved surface,
The track surface of the outer ring and the inner ring member is a cam follower that is a concave curved surface along the rolling surface of the roller.   The cam follower according to claim 1, wherein the rollers are arranged in a double row. An outer ring whose outer diameter surface abuts on the track and has a raceway surface on the inner diameter surface;
An inner ring member having a raceway surface on the outer diameter surface;
A plurality of rollers arranged along the raceway surface of the outer ring and the inner ring member,
The rolling surface of the roller is a convex curved surface,
The track surface of the outer ring and the inner ring member is a roller follower that is a concave curved surface along the rolling surface of the roller. The roller follower according to claim 3, wherein the rollers are arranged in a double row.

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