Attachment arrangement for composite wheels
The present invention provides an attachment arrangement for use in attaching at least one composite wheel to a mount using an elongate fastener element and a fastening nut which can be fastened on the elongate fastener element. The attachment arrangement is used with a composite wheel that includes at least one attachment aperture through which the elongate fastener element is inserted. The attachment arrangement includes a fastening washer having a fastening aperture through which the elongate fastener element can be inserted when in use. The fastening aperture includes a radially central fastening axis. The fastening washer also has a base configured to face a surface of the composite wheel about the attachment aperture. In addition, the fastening washer has a fastening side facing substantially axially outwardly from the attachment aperture. The fastening side includes at least one engagement surface configured to operatively engage a complementary portion of the fastening nut when the fastening nut is assembled on the elongate fastener element. The fastening arrangement also includes a sleeve which extends axially relative to the fastening axis outwardly from the base about the fastening aperture. The sleeve is configured to extend into the attachment aperture of the composite wheel. The sleeve also includes a distal end configured to be received in a complementary shaped sleeve aperture located in the mount or in an element located adjacent the mount.
1. An attachment arrangement for use in attaching at least one composite wheel to a mount using an elongate fastener element and a fastening nut fastenable on the elongate fastener element, the composite wheel including at least one attachment aperture through which the elongate fastener element is inserted, the attachment arrangement including:
a fastening washer that includes:
a fastening aperture through which the elongate fastener element is inserted when in use, the fastening aperture including a fastening axis;
a base configured to face a surface of the composite wheel about the attachment aperture; and
a fastening side facing substantially axially outwardly from the attachment aperture relative to the fastening axis, the fastening side including at least one engagement surface configured to operatively engage a complementary portion of the fastening nut when the fastening nut is assembled on the elongate fastener element;
the attachment arrangement further including a sleeve which extends axially relative to the fastening axis outwardly from the base about the fastening aperture, the sleeve being configured to extend into the attachment aperture of the composite wheel, the sleeve including a distal end configured to be received in a sleeve aperture located in the mount or in an element located adjacent the mount.
2. The attachment arrangement according to claim 1 , wherein the sleeve aperture and the distal end of the sleeve have a complementary configuration or feature which substantially prevents axial rotation relative to the fastening axis of the sleeve relative to the mount.
3. The attachment arrangement according to claim 2 , wherein the complementary configuration or feature includes at least one of a polygonal shape, irregular shape, spline, flat, recess, shoulder, projection, spigot, key, cavity, groove or finger.
4. The attachment arrangement according to claim 1 , wherein the base of the fastening washer includes a fixing feature that which substantially prevents axial rotation of the sleeve relative to the mount.
5. The attachment arrangement according to claim 4 , wherein the fixing feature comprises at least one projection, spigot, flange or embossment that is seated in at least one complementary groove, hole, aperture, detent, recess or depression in the surface of the composite wheel.
6. The attachment arrangement according to claim 1 , wherein the sleeve aperture is sized to allow only a portion of the sleeve to move through the sleeve aperture.
7. The attachment arrangement according to claim 1 , wherein a radial width relative to the fastening axis of the sleeve is smaller than the radial width relative to the fastening axis of the fastening aperture.
8. The attachment arrangement according to claim 1 , further including a backing element configured to be inserted between the mount and the composite wheel, the backing element including at least one section of the sleeve aperture.
9. The attachment arrangement according to claim 8 , wherein the backing element comprises a plate configured to abut the surface of the composite wheel about the attachment aperture.
10. The attachment arrangement according to claim 8 , wherein the distal end of the sleeve has a fixing feature which prevents withdrawal of the sleeve through the sleeve aperture of the backing element.
11. The attachment arrangement according to claim 10 , wherein the fixing feature comprises a deformation of the distal end of the sleeve, such that the distal end has a greater size than the sleeve aperture.
12. The attachment arrangement according to claim 8 , wherein the composite wheel includes at least two fastening apertures, and the backing element includes at least two sleeve apertures configured to cooperate with sleeves from respective fastening washers inserted through each of the at least two fastening apertures.
13. The attachment arrangement according to claim 1 , wherein the base of the fastening washer is bonded to the abutting surface of the composite wheel.
14. The attachment arrangement according to claim 1 , wherein the engagement surface of the fastening washer is angled or curved relative to the fastening axis.
15. The attachment arrangement according to claim 14 , wherein the engagement surface of the fastening washer comprises a substantially annular portion of the fastening side.
16. The attachment arrangement according to claim 1 , wherein the base of the fastening washer includes a flat engagement surface configured to abut the surface of the composite wheel about the attachment aperture.
17. The attachment arrangement according to claim 1 , wherein the composite wheel comprises a carbon fibre composite wheel.
18. The attachment arrangement according to claim 8 , wherein the sleeve includes a cutout section to provide clearance between the distal end of the sleeve and a section of a surface of the backing element proximal the sleeve aperture.
19. The attachment arrangement according to claim 18 , wherein the cutout section comprises a step in the distal end of the sleeve.