Tapered bearing system to minimize shaft damage and component failure

• US 9,222,517 B1
• Filed: 11/26/2014
• Issued: 12/29/2015
• Est. Priority Date: 11/26/2014
• Status: Active Grant

• Current Assignee: Bradford Christopher King
• Original Assignee: Bradford Christopher King
• Inventors: King, Bradford Christopher
• Primary Examiner(s): Charles, Marcus
• Application Number:
  US14/555,207
• Time in Patent Office: 398 Days
• Field of Search: 384/513, 384/516, 384/551, 384/559, 384/563, 384/565, 384/571, 384584-586, 411/120, 411/122, 411/197
• US Class Current: 1/1
• CPC Class Codes: B23Q 1/28 Means for securing sliding members in any desired position
• CPC Class Codes: F16C 19/364 with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
• CPC Class Codes: F16C 19/548 in O-arrangement
• CPC Class Codes: F16C 19/56 in which the rolling bodies of one bearing differ in diameter from those of another
• CPC Class Codes: F16C 2226/16 by wedge action, e.g. by tapered or conical parts
• CPC Class Codes: F16C 33/583 Details of specific parts of races
• CPC Class Codes: F16C 35/063 Fixing them on the shaft with interposition of an element F16C35/07

Abstract

A roller bearing system for use with a rotating shaft remains locked to the shaft during thermal expansion and vibrations generated by the rotating shaft. The system includes a first bearing assembly with a first bearing cone connected to the shaft, a tubular member disposed around the shaft and positioned against the first bearing assembly, a disc spring assembly connected to the shaft and positioned between the tubular member and a clearance ring, a second bearing assembly with a second bearing cone connected to the shaft and positioned against the clearance ring, and a locking assembly connected to the shaft and positioned against the second bearing assembly. The locking assembly rotatably adjusts to exert sufficient pressure to lock the first bearing cone to the shaft and enable the disc spring assembly to generate a compression force to lock the second bearing cone to the shaft.

Claims

1. A tapered roller bearing system for use with a rotating shaft secured within a housing, the bearing system being configured to remain locked to the shaft during thermal expansion and vibrations generated by the rotating shaft to minimize shaft damage and component failure, the bearing system comprising:

a first bearing assembly comprising a first bearing cone operably connected to a tapered portion of the shaft;

a tubular member disposed around the shaft and positioned against the first bearing assembly;

a disc spring assembly operably connected to the shaft and positioned between the tubular member and a clearance ring;

a second bearing assembly comprising a second bearing cone operably connected to the shaft and positioned against the clearance ring; and

a locking assembly operably connected to the shaft and positioned against the second bearing assembly, wherein the locking assembly is configured to rotatably adjust to exert sufficient pressure to lock the first bearing cone to the shaft and enable the disc spring assembly to generate a compression force to exert frictional pressure between the clearance ring and the locking assembly to lock the second bearing cone to the shaft, wherein contact between the first bearing cone and the tapered portion of the shaft minimizes slippage of the first and second bearing cones on the shaft, thereby minimizing damage to the shaft.

2. The bearing system of claim 1, wherein the disc spring assembly comprises a first disc spring disposed around the shaft and positioned against the tubular member, a second disc spring disposed around the shaft and positioned between the first disc spring and the clearance ring.

3. The bearing system of claim 2, wherein the first disc spring and the second disc spring each comprises a concave side, wherein the concave side of the first disc spring is oriented to contact the concave side of the second disc spring.

4. The bearing system of claim 3, wherein the locking mechanism comprises a flat washer disposed around a threaded portion of the shaft and positioned against the second bearing assembly, and a castellated lock nut comprising interior threads configured to engage with the threaded portion of the shaft.

5. The bearing system of claim 4, wherein the first bearing assembly comprises a first set of bearing rollers disposed on the first bearing cone and a first bearing outer race disposed around the first set of bearing rollers.

6. The bearing system of claim 5, wherein the first bearing cone comprises a tapered bore configured to receive a tapered portion of the shaft.

7. The bearing system of claim 6, wherein the second bearing assembly comprises a second set of bearing rollers disposed on the second bearing cone and a second bearing outer race disposed around the second set of bearing rollers.

8. The bearing system of claim 7, wherein the second bearing cone comprises a cylindrical bore configured to receive a cylindrical portion of the shaft.