Stud-type roller bearing with tracking roller

• US 20030210840A1
• Filed: 04/03/2003
• Published: 11/13/2003
• Est. Priority Date: 05/07/2002
• Status: Abandoned Application

• Current Assignee: Nippon Thompson Company Limited
• Original Assignee: Nippon Thompson Company Limited
• Inventors: Ogawa, Yoshitaka
• Application Number:
  US10/405,695
• Publication Number:
  US 20030210840A1
• Time in Patent Office: Days
• US Class Current: 384/477
• CPC Class Codes: F16C 13/006 Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
• CPC Class Codes: F16C 19/466 comprising needle rollers and an outer ring, i.e. subunit without inner ring
• CPC Class Codes: F16C 21/00 Combinations of sliding-contact bearings with ball or roller bearings, for exclusively rotary movement F16C17/24, F16C19/52 take precedence
• CPC Class Codes: F16C 33/7809 for needle roller bearings

Abstract

A stud-type roller bearing with tracking roller, in which a thrust washer together with a sealing member fits effectively in a space limited to get the bearing in itself shrunk in size. With the stud-type roller bearing with tracking roller disclosed here, an outer ring is made at axially opposite ends thereof with circular setbacks, one to each end, which are larger in their inside diameters than a circular raceway surface. Any one of the setbacks is arranged in opposition to the flange of the shaft while the other is placed in opposition relation to a cover plate that fits on the shaft at a location adjacent to the raceway surface around the shaft. Circular recesses are cut in the setbacks to hold a laminate of the thrust washer and the elastic sealing member together with the thrust washer therein.

Claims

1. A stud-type roller bearing with tracking roller;

a circular outer ring having a first circular raceway surface over an inside surface thereof, a shaft fit in the outer ring for rotation, the shaft being made at any one of forward and aft ends thereof with a flange while at the other end with a thread, and provided around an outside surface thereof with a second circular raceway surface confronting the first raceway surface, and more than one roller disposed between the first raceway surface and the second raceway surface to roll through a load raceway circuit;

wherein the outer ring is made at axially opposite ends thereof with circular setbacks, one to each end, which are larger in their inside diameters than the first circular raceway surface, and any one of the setbacks is arranged in opposition to the flange of the shaft while the other is placed in opposition relation to a cover plate that fits on the shaft at a location adjacent to the second raceway surface around the shaft; and

wherein the setbacks are each made with a circular recess where a laminate of a thrust washer and an elastic sealing member joined together with the thrust washer fits therein.

2. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the cover plate fits in a circular groove around the shaft, which is cut at a location next to the second raceway surface on the shaft.

3. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the roller is held in a retainer having more than one pocket that are spaced circumferentially at regular intervals around the retainer.

4. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the thrust washer fits in the circular recess with being situated nearer to the first raceway surface than the sealing member in such a way that a circular inside surface of the thrust washer is in opposition to a circular periphery of the retainer.

5. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein one of the axially opposite sealing members has a circular lip extending radially inwards out of the sealing member into abutment against a circular periphery of the flange, thereby closing a circular clearance left between the circular periphery of the flange and a circular inside surface in the associated setback, while the other sealing member has a circular lip extending radially inwards out of the sealing member into abutment against a circular periphery of the cover plate, thereby closing a circular clearance left between the circular periphery of the cover plate and a circular inside surface in the associated setback.

6. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the thrust washer is made of a thermoplastic synthetic resin including polyether ether ketone and so on much subject to elastic deformation, which is rich in wear-resisting property as well as in mechanical strength, and also less subjected to deformation, and wherein the thrust washer is formed into a circular disc of rectangle in cross section.

7. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the sealing member is made of elastically deformable synthetic resin including polypropylene and so on.

8. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the outer ring is made as radially thin as possible, providing there is reserved a desired thickness between the circular periphery of the outer ring and the bottom of the circular recess.

9. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the sealing member has an outside periphery that is chamfered along axially circular edges thereof to render the sealing member easier to fit in the recess cut in the outer ring.

10. A stud-type roller bearing with tracking roller constructed as defined in claim 1, wherein the flange integral with lengthwise one end of the shaft comes into engagement with one circular side of the retainer, while the cover plate held in the circular groove around the shaft comes into engagement with the other circular side of the retainer, so that the retainer is held in place between the flange and the cover plate.

11. A stud-type roller bearing with a tracking roller constructed as defined in claim 1, wherein the flange of the shaft is made on an end face thereof with a hole that fits on any fastening bolt, and also an oiling passage communicating the hole and the load raceway circuit.