Boot assembly for a joint member

• US 10,378,593 B1
• Filed: 04/27/2018
• Issued: 08/13/2019
• Est. Priority Date: 04/27/2018
• Status: Active Grant

• Current Assignee: GKN Driveline North America Incorporated (Melrose Industries Plc)
• Original Assignee: GKN Driveline North America Incorporated (Melrose Industries Plc)
• Inventors: Cassell, Robert L.
• Primary Examiner(s): Binda, Greg
• Application Number:
  US15/964,116
• Time in Patent Office: 473 Days
• Field of Search: 464173-175, 403 50, 403 51, 277634-637
• CPC Class Codes: F16D 2003/22316 Means for fastening or attaching the bellows or gaiters
• CPC Class Codes: F16D 3/223 the rolling members being guided in grooves in both coupling parts
• CPC Class Codes: F16D 3/845 allowing relative movement of joint parts due to the flexing of the cover
• CPC Class Codes: F16J 15/50 between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall
• CPC Class Codes: F16J 3/042 Fastening details
• CPC Class Codes: Y10S 464/906 Torque transmitted via radially spaced balls
• CPC Class Codes: Y10T 403/606 Leaf spring

Abstract

A boot assembly for a joint includes a boot and a boot can coupled to the boot at a connecting portion. The boot can includes a mounting portion including a flange having an inner surface and a retainer. The retainer is connected to the flange at a first location and is separate from the flange at a second location spaced from the first location. The retainer includes an inward portion spaced from the first location, and the inward portion is arranged closer to the axis than is the inner surface of the retainer between the first location and a midpoint of the retainer. The inner surface of the retainer is not at a constant angle relative to the axis along the length of the retainer.

Claims

1. An assembly for a joint, comprising;

a joint member having a body with a central axis and an annular mounting surface defined by a portion of a radially outer surface of the body, the mounting surface including a radially inwardly extending void open to the outer surface; and

a boot assembly coupled to the joint member, the boot assembly having;

a boot made from a flexible material; and

a boot can having a body that includes a connecting portion at which the boot and boot can are coupled together, and a mounting portion received over the mounting surface to couple the boot assembly to the joint member, the mounting portion includes a retainer that is connected to the boot can at a first location and is separate from the boot can at a second location spaced from the first location and the mounting portion includes a void that defines the second location of the retainer, and the retainer is flexible and resilient so that at least a portion of the retainer is movable relative to the remainder of the boot can between an unflexed state and a flexed state, the retainer has a bend spaced from the first location that defines an inward portion of the retainer that, in the unflexed state of the retainer, is located radially closer to the axis than the remainder of the retainer and closer to the axis than at least a portion of the mounting surface, wherein when the mounting portion is received over the mounting surface, the inward portion engages the joint member and the retainer is flexed outwardly to the flexed state wherein the inward portion engages the mounting surface, and when the inward portion is aligned with the void the inward portion may resiliently return toward its unflexed position so that the inward portion is received in the void with part of the inward portion closer to the axis than the mounting surface outboard of the void and removal of the boot assembly from the joint is inhibited by engagement of the retainer with the joint member body.

2. The assembly of claim 1 wherein the void in the mounting surface is a circumferentially extending groove, and wherein the boot can includes multiple retainers that are circumferentially spaced apart and each arranged for receipt of an inward portion of each retainer in the groove.

3. The joint assembly of claim 1 wherein the mounting surface includes more than one inwardly extending void and the voids are not continuous with each other, are circumferentially spaced around the outer surface, and arranged for receipt of an inward portion of the retainer.

4. The assembly of claim 1 wherein the inner surface of the retainer, between the first location and a midpoint between the first location and second location, is not more than 1 mm closer to the axis than a radially innermost portion of the inner surface of the flange.

5. The assembly of claim 1 wherein the inner surface of the retainer, between the first location and a midpoint between the first location and second location, is at an angle relative to the axis that does not vary by more than 10 degrees.

6. The assembly of claim 5 wherein the inner surface of the retainer from the midpoint to the first location is parallel to the axis or within 5 degrees of parallel to the axis.

7. The assembly of claim 1 wherein the inward portion is defined in a free end of the retainer that is movable relative to the flange and the free end is bent relative to the remainder of the retainer at an angle of at least 20°

.

8. The assembly of claim 1 wherein the inner surface of the retainer is not at a constant angle relative to the axis along the length of the retainer.

9. The assembly of claim 1 wherein the second location includes a free end of the retainer and wherein the inward portion is closer to the free end than the first location.

10. An assembly for a joint, comprising;

a joint member having a body with a central axis and an annular mounting surface defined by a portion of a radially outer surface of the body, the mounting surface including a radially inwardly extending void open to the outer surface; and

a boot assembly coupled to the joint member, the boot assembly having;

a boot made from a flexible material; and

a boot can having a body that includes a connecting portion at which the boot and boot can are coupled together, and a mounting portion received over the mounting surface to couple the boot assembly to the joint member, the mounting portion includes a retainer that is connected to the remainder of the boot can at a first location and is separate from the remainder of the boot can at a second location spaced from the first location, and the retainer is flexible and resilient so that at least a portion of the retainer is movable relative to the remainder of the boot can between an unflexed state and a flexed state, the retainer has a bend spaced from the first location that defines an inward portion of the retainer that, in the unflexed state of the retainer, is located radially closer to the axis than the remainder of the retainer and closer to the axis than at least a portion of the mounting surface, wherein when the mounting portion is received over the mounting surface, the inward portion engages the joint member and the retainer is flexed outwardly to the flexed state wherein the inward portion engages the mounting surface, and when the inward portion is aligned with the void the inward portion may resiliently return toward its unflexed position so that the inward portion is received in the void with part of the inward portion closer to the axis than the mounting surface outboard of the void and removal of the boot assembly from the joint is inhibited by engagement of the retainer with the joint member body, wherein the second location includes a free end of the retainer and wherein the inward portion is closer to the free end than the first location.