TORQUE DAMPENING COMPENSATOR FOR A VEHICLE

• US 20100009763A1
• Filed: 07/11/2008
• Published: 01/14/2010
• Est. Priority Date: 07/11/2008
• Status: Active Grant

• Current Assignee: Harley-Davidson Motor Company Incorporated (Harley-Davidson Incorporated)
• Original Assignee: Harley-Davidson Motor Company Group Incorporated (Harley-Davidson Incorporated)
• Inventors: Kopp, Joel, Martinek, Christopher, Boppre, William
• Granted Patent: US 7,931,538 B2
• Time in Patent Office: Days
• US Class Current: 464/73
• CPC Class Codes: B62M 7/02 with engine between front and rear wheels
• CPC Class Codes: F16D 3/68 the elements being made of rubber or similar material
• CPC Class Codes: F16F 15/124 Elastomeric springs F16F15/123, F16F15/127 take precedence

Abstract

A torque dampening compensator for a vehicle including an isolator member disposed between an input member and an output member. The isolator member includes isolator elements disposed between corresponding lugs of the respective input and output members. The lugs of the output member have a draft angle, and the isolator elements have contact faces corresponding to the respective lugs with unequal axial depths to induce a moment on each isolator element that counteracts a thrust load between the input and output members initiated by the draft angle. One isolator element of the isolator member is formed to have a size corresponding to the space provided between adjacent lugs of the input and output members and a shape that is dissimilar from the space. The one isolator element is resiliently deformable into the space.

Claims

1. A torque dampening compensator for a vehicle comprising:

an input member operable to receive an input torque, the input member including a first lug portion operable to transmit the input torque;

an output member operable to transmit an output torque that is less than or equal to the input torque, the output member including a second lug portion operable to receive the output torque; and

an isolator member disposed between the input member and the output member, the isolator member operable to receive the input torque from the input member, to selectively absorb a portion of the input torque, and to transmit the output torque to the output member,

wherein the isolator member includes a first portion positioned in a space between the first lug portion and the second lug portion, the first portion of the isolator member having a size corresponding to the space and having a shape that is dissimilar to the space, the first portion of the isolator member being resiliently deformable into the space.

2. The torque dampening compensator of claim 1, wherein the isolator member includes a plurality of spaced-apart portions positioned in a plurality of separate spaces between corresponding pairs of lug portions of the input and output members, the space between the first lug portion of the input member and the second lug portion of the output member having a predetermined size when the compensator is in a neutral state with each of the plurality of spaced-apart portions of the isolator member being positioned in a respective one of the plurality of separate spaces between corresponding pairs of lug portions of the input and output members.

3. The torque dampening compensator of claim 2, wherein the first portion of the isolator member includes a first side that is generally concave and a second side opposite the first side having a protrusion.

4. The torque dampening compensator of claim 3, wherein the first portion of the isolator member is resiliently deformed between the first and second lug portions when the compensator is in the neutral state such that the first generally concave side of the isolator member is stressed in tension and the protrusion is compressed.

5. The torque dampening compensator of claim 4, wherein the first portion of the isolator member is the only portion of isolator member configured to be substantially deformed in the neutral state of the compensator.

6. The torque dampening compensator of claim 5, wherein the first and second lug portions have an axial overlap and the first portion of the isolator member has an axial depth within the axial overlap, the protrusion extending along the second side of the first portion of the isolator member in the axial direction a length substantially less than the axial depth of the first portion of the isolator member.

7. The torque dampening compensator of claim 6, wherein the protrusion extends along the second side of the first portion of the isolator member in the axial direction a length about three fourths the axial depth of the first portion of the isolator member.

8. The torque dampening compensator of claim 5, wherein the first portion of the isolator member exerts a biasing force that urges the first lug portion and the second lug portion away from each other, the biasing force being resistant to compression set in the isolator member from repeated loading and unloading.

9. The torque dampening compensator of claim 2, wherein the plurality of spaced-apart portions of the isolator member include a plurality of first portions for absorbing torque impulses in a first rotational direction between the input and output members and a plurality of second portions for absorbing torque impulses in a second rotational direction between the input and output members that is opposite the first rotational direction.

10. The torque dampening compensator of claim 9, wherein each of the plurality of first portions is paired with one of the plurality of second portions, each pair of first and second portions being coupled together with a connecting strap.

11. The torque dampening compensator of claim 9, wherein the plurality of first portions and the plurality of second portions are all coupled to a central ring.

12. A torque dampening compensator for a vehicle comprising:

an input member rotatable about an axis and operable to receive an input torque, the input member including a first radially-extending lug operable to transmit the input torque, the first radially-extending lug having a first radially-extending contact face;

an output member rotatable about the axis and operable to transmit an output torque that is less than or equal to the input torque, the output member including a second radially-extending lug operable to receive the output torque, the second radially-extending lug having a second radially-extending contact face; and

an isolator member disposed between the input member and the output member, the isolator member operable to receive the input torque from the input member, to selectively absorb a portion of the input torque, and to transmit the output torque to the output member,

wherein the isolator member includes a first portion having a first surface in contact with the first contact face and a second surface in contact with the second contact face, at least one of the first and second contact faces being non-parallel with the axis and having a draft angle promoting a thrust load between the input member and the output member when the isolator member is compressed between the first and second lugs, and wherein the first and second surfaces of the isolator member are asymmetrical, counteracting the thrust load.

13. The torque dampening compensator of claim 12, wherein the first and second lugs have an axial overlap and the first portion of the isolator member has an axial depth within the axial overlap, the contact between one of the first and second lugs and the first portion of the isolator member being greater in the axial direction than the contact between the other of the first and second lugs and the first portion of the isolator member.

14. The torque dampening compensator of claim 13, wherein the second lug is non-parallel with the axis and has a draft angle, the contact between the second lug and the first portion of the isolator member is greater in the axial direction than the contact between the first lug and the first portion of the isolator member.

15. The torque dampening compensator of claim 13, wherein the first portion of the isolator member further includes an inboard surface facing a body portion of one of the input member and the output member and an outboard surface facing a body portion of the other of the input member and the output member, both the inboard surface and the outboard surface being generally concave.

16. The torque dampening compensator of claim 15, wherein the inboard and outboard surfaces are spaced from the respective body portions of the input member and the output member.

17. The torque dampening compensator of claim 16, wherein the first portion of the isolator member is resiliently compressed between the first and second lugs, increasing the axial depth of the first portion of the isolator member, the first portion of the isolator member being configured to maintain its inboard and outboard surfaces out of contact with the respective body portions of the input and output members during compression of the first portion of the isolator member.

18. The torque dampening compensator of claim 13, wherein the input member includes a third radially-extending lug, the second lug of the output member being circumferentially interposed between the first and third lugs of the input member.

19. The torque dampening compensator of claim 18, wherein the isolator member includes a second portion positioned between the second lug and the third lug, the first portion being configured to absorb torque impulses in a first rotational direction between the input and output members and the second portion being configured to absorb torque impulses in a second rotational direction between the input and output members that is opposite the first rotational direction, the first and second portions of the isolator member being coupled together with a strap extending directly across the second lug.

20. The torque dampening compensator of claim 19, wherein the first portion and the second portion are respective ones of a plurality of spaced-apart first portions and a plurality of spaced-apart second portions, wherein the plurality of first portions and the plurality of second portions are all coupled to a central ring.