1 inner ring
2 outer ring
3 spherical roller
10 cage for self-aligning roller bearing
11 pocket
11
a inner lateral surface of a pocket on the side of a small-diameter flange
12 annular section
13 outward flange
14 pawl
15 small-diameter flange
20 roller inserting guide
21 guise surface
An example of an embodiment of the present invention is to be described with reference to the drawings.
A cage 10 assembled in the self-aligning roller bearing as an example of the embodiment of the present invention is formed integrally, for example, by press molding and, as shown in
Then, the pawl 14 protruded on the outward flange 13 engages the concave 3a formed in the head of the spherical roller 3 after insertion of the spherical roller 3 into the cage 10 thereby preventing the spherical roller 3 from detaching out of the cage 10.
Then, in this embodiment, a roller inserting guide 20 is disposed on the outer circumferential side of the small-diameter flange 15 of the cage 10, and a guide surface 21 substantially in parallel with the direction of an angle of contact of the spherical roller 3 is disposed to the roller inserting guide 20 along the inner lateral surface 11a of the pocket 11 on the side of the small-diameter flange 15. Further, the roller inserting guide 20 is formed by applying caulking to the small-diameter flange 15 thereby radially bending the same in an arcuate shape outward of the cage 10 as shown in
As described above, in this embodiment, since the guide surface 21 substantially in parallel with the direction of the angle a contact of the spherical roller 3 is formed, along the inner lateral surface 11a of the pocket 11 on the side of the small-diameter flange 15 to the roller inserting guide 20 disposed on the outer circumferential side of the small-diameter flange 15 of the cage 10, the attitude of the spherical roller 3 can be controlled to a stable state by the guide surface 21 of the roller inserting guide 20 before contact of the top end of the spherical roller 3 in the insertion direction with a point A1 where the inner lateral surface 11a of the pocket 11 on the side of the small-diameter flange 15 crosses the shortest distance directional line B and with a point A2 where the pawl 14 crosses the shortest distance directional line B with reference to
As a result, also in a case of inserting the spherical roller 3 into the cage 10 at a substantially optimal insertion angle (angle orthogonal to the shortest distance directional line B), the spherical roller 3 can be inserted easily into the cage 10 with a considerably smaller force than usual under deformation of the pawl 14 while rotating the roller in a stable attitude by a cylinder device 9, thereby capable of preventing poor insertion of the roller or detachment of the roller.
Further, since the roller inserting guide 20 is formed by applying caulking to the small-diameter flange 15, the roller inserting guide 20 can be formed easily without increasing the number of parts but by merely changing the shape of the existent cage.
The constitution of the self-aligning roller bearing, the inner ring, the outer ring, the roller, the cage, the pocket, the annular section, the outward flange, the pawl, the small-diameter flange, the guide surface, the inner lateral surface of the pocket on the side of the small-diameter flange, the roller inserting guide, etc. in the present invention are not restricted to those of the embodiment described above but they can be properly modified within a range not departing the gist of the invention.
For example, while the embodiment described above shows an example of forming the roller inserting guide 20 by applying caulking to the small-diameter flange 15, the roller inserting guide 20 may alternatively be formed integrally with the cage by burring fabrication as shown in
Further, it may also be formed by applying crushing to the small-diameter flange portion 7b.
According to the present invention, since the roller inserting guide is disposed on the outer circumferential side of the small-diameter flange of the cage with the guide surface substantially in parallel with the direction of the angle of contact of the roller being disposed to the pocket on the side of the small-diameter flange, the spherical roller can be inserted easily into the cage in a stable attitude substantially at an optimal insertion angle, thereby capable of preventing poor insertion of the roller or detachment of the roller.
In this case, the roller inserting guide can easily be formed without increasing the number of parts but by merely changing the shape of the existent cage, by applying caulking to the small-diameter flange thereby forming the roller inserting guide.
Number | Date | Country | Kind |
---|---|---|---|
2004-161602 | May 2004 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
---|---|---|---|---|
PCT/JP05/07791 | 4/25/2005 | WO | 00 | 7/5/2006 |