Bearing Assemblies for the Pinion Shaft of an Axle Differential

• US 20070269157A1
• Filed: 08/10/2005
• Published: 11/22/2007
• Est. Priority Date: 08/11/2004
• Status: Abandoned Application

• Current Assignee: The Timken Company
• Original Assignee: The Timken Company
• Inventors: Fahrni, Glenn, Piotrowski, Gregory, Marcelli, Michael, Marks, Christopher
• Application Number:
  US11/659,889
• Publication Number:
  US 20070269157A1
• Time in Patent Office: Days
• US Class Current: 384/569
• CPC Class Codes: F16B 39/10 by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the boltF16B39/08 takes precedence
• 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 2226/60 with threaded parts, e.g. bolt and nut connections in general F16B23/00 - F16B43/00
• CPC Class Codes: F16C 2361/61 Toothed gear systems, e.g. support of pinion shafts in general F16H57/02
• CPC Class Codes: F16C 25/06 Ball or roller bearings
• CPC Class Codes: F16C 33/586 outside the space between the races, e.g. end faces or bore of inner ring
• CPC Class Codes: F16C 35/067 Fixing them in a housing with interposition of an element F16C35/07
• CPC Class Codes: F16H 2048/423 characterised by bearing arrangement
• CPC Class Codes: F16H 57/021 Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
• CPC Class Codes: F16H 57/037 Gearboxes for accommodating differential gearings rotating cases for differential gearings F16H48/40
• CPC Class Codes: Y10T 29/53 Means to assemble or disassemble

Abstract

The vehicle differential includes a housing (40) having at least one bearing seat (41) that is aligned along an axis. The housing also includes a counter bore having an internal thread. A bearing assembly (20) located in at least one bearing seat (41) supports a pinion shaft. The bearing assembly (20) comprises a bearing (38) and a lock member (62). The bearing (38) is located in at least one bearing seat (41) and around the pinion shaft. The bearing (38) includes an outer race (45), an inner race (46) and rolling elements (47). The outer race has a raceway (48) that is inclined with respect to the axis. The outer race (45) also has an external thread (49) on the narrow/thin section of the outer race, that is located around the outer race (45) and that is engaged with the internal thread (43) of the housing counter bore to set the bearing (38) along the axis. The external thread (49) may have at least one of an axial groove (60) and a radial slot (56) such that the axial groove (60) is positioned within the external thread (49) and the radial slot (56) is positioned within the external thread (49) and the outer race (45). Additionally, the outer race may contain no axial grooves nor radial slots. The lock member (62) may removably attach to at least one of the axial groove (60) and the radial slot (56) of the outer race (45) and removably attaches to the housing (40) whereby the lock member (62) prevents rotation of the outer race (45) within the bearing seat (41) of the housing (40). The lock member may also attach to the outer race by other methods.

Claims

1-28. -28. (canceled)

29. A bearing assembly for facilitating rotation about an axis, the bearing assembly comprising:

a housing having an internal thread presented toward the axis and also having a slot providing a well-defined surface that is oriented generally radially with respect to the axis;

an outer race received in the housing, the outer race having an external thread that engages the internal thread of the housing, so that rotation of the outer race in the housing will change the axial position of the outer race in the housing; and

a lock member attached to the outer race so that it cannot rotate with respect to the outer race, the lock member having a tab that projects into the slot and that lies along the well-defined surface, so that the lock member and outer race remain fixed against rotation in the housing.

31. The bearing assembly of claim 29 wherein the outer race has an axial groove and a radial slot such that the axial groove opens out of the outer race and the radial slot opens out of an end of the outer race, wherein the lock member couples to at least one of the axial groove and the radial slot of the outer race and couples to the housing, whereby the lock member prevents rotation of the outer race within the housing.

32. The bearing assembly of claim 31 wherein the lock member includes a body having a first end, a middle portion and a second end.

33. The bearing assembly of claim 31 wherein the first end includes an extension that engages the radial slot of the outer race and the second end includes a bendable ear that engages at least one radial slot of the housing.

34. The bearing assembly of claim 31 wherein the lock member includes a portion having a tube defining a plurality of holes there through, the lock member further including a fastener that inserts through a threaded hole of the housing and through one of the plurality of holes of the tube to fasten the lock member to the housing.

35. The bearing assembly of claim 32 wherein the body comprises a snap ring such that the first end comprises an outer diameter of the snap ring and the second end comprises an inner diameter of the snap ring.

36. The bearing assembly of claim 35 wherein the first end comprises a pair of extensions that engages at least one groove of the housing.

37. The bearing assembly of claim 36 wherein the second end includes at least one bendable ear that engages the radial slot of the outer race.

38. The bearing assembly of claim 32 wherein the first end includes at least one extension that extends into the axial groove of the outer race.

39. The bearing assembly of claim 32 wherein the middle portion comprises a tube having a dimple extending away from the tube and toward the housing such that the dimple engages the housing.

40. The bearing assembly of claim 32 wherein the secure end includes a lip that engages a keyway of the housing.

41. The bearing assembly of claim 32 further comprising a fastener that inserts through the housing and through the body.

30. A bearing assembly for facilitating rotation about an axis, the bearing assembly comprising:

a first member in the form of a housing, the housing having an internal thread presented toward the axis;

a second member in the form of an outer race, the outer race being received in the housing, the outer race having an external thread that engages the internal thread of the housing, so that rotation of the outer race in the housing will change the axial position of the outer race in the housing, the outer race having a raceway that is presented inwardly toward the axis and is inclined with respect to the axis;

one of the members providing a well-defined surface that is oriented generally radially with respect to the axis; and

a lock member attached to the other member so that lock member cannot rotate with respect to the other member, the lock member providing an edge that lies along the well-defined surface of the one member, so that the lock member and other member cannot rotate with respect to the one member.

42. In a vehicle differential including a housing having at least one bearing seat that is aligned along an axis, the housing includes a bore having an internal thread, a bearing assembly located in at least one bearing seat for supporting a pinion shaft, the bearing assembly, comprising:

a bearing located in at least one bearing seat and located around the pinion shaft, the bearing having

an outer race having a raceway that is inclined with respect to the axis, the outer race having an external thread on the narrow section end of the outer race, that is located around the outer race and that is engaged with the internal thread of the housing bore to set the bearing along the axis,

an inner race having a raceway located around the shaft, the raceway being inclined with respect to the axis in the same direction as the raceway for the outer race,

rolling elements located between and contacting the raceways; and

a lock member attached to the outer race and to the housing, the lock member including a body having a first end and a second end such that the first end attaches to the housing and the second end attaches to the outer race whereby the lock member prevents rotation of the outer race within the bearing seat of the housing.

43. In combination with the bearing assembly of claim 42, a setting tool comprising an inner diameter, an outer diameter and at least one projection which is configured to engage the lock member and turn the lock member when a torque is applied to the setting tool.

44. The bearing assembly of claim 42 further comprising a fastener that inserts through the housing and through the first end of the body to attach the first end to the housing and into the external thread of the outer race.

45. The bearing assembly of claim 42 wherein the housing includes a slot and the outer race includes another slot positioned through the external thread such that the first end of the lock member inserts through the slot in the housing while the second end of the lock member inserts through other slot in the outer race.

46. A process for securing a bearing assembly having a housing with a bearing seat that is concentric about an axis, the housing having a bore which has an internal thread and the housing having a slot, such that the bearing assembly located on the bearing seat supports a shaft, the process comprising:

inserting a bearing within the housing, the bearing comprising an outer race having a raceway that is inclined with respect to the axis, the outer race having an external thread on the narrow section end of the outer race, that is located around the outer race and that is engaged with the internal thread of the housing bore to set the bearing along the axis, the bearing further comprising an inner race having a raceway located around the shaft, the raceway being inclined with respect to the axis in the same direction as the raceway for the outer race and rolling elements located between and contacting the raceways;

rotating the outer race to engage the external thread and the internal thread until the bearing achieves a desired setting on the shaft; and

attaching a lock member to the outer race to prevent rotation of the outer race within the housing wherein the lock member has a tab that projects into the slot of the housing, whereby the lock member and outer race remain fixed against rotation in the housing.

47. The process according to claim 46 wherein attaching the outer race comprises engaging an extension of the lock member with a radial slot of the outer race.

48. The process according to claim 46 wherein attaching the outer race comprises engaging a bendable ear of the lock member with a slot of the housing.

49. The process according to claim 46 wherein attaching the outer race comprises engaging an extension of the lock member with an axial groove of the outer race.

50. The process according to claim 46 wherein attaching the outer race comprises fastening the lock member to the housing.

51. The process according to claim 50 wherein attaching the outer race comprises fastening the lock member to the outer race.