Heat dissipating brake rotor

Patent metadata

Field	Value
Publication number	US-10480601-B2
Application number	US-201615252933-A
Country	US
Kind code	B2
Filing date	Aug 31, 2016
Priority date	Jun 22, 2016
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

A brake rotor for a bicycle has a brake body formed of a first material and a cooling element with a cooling body, at least part of which is formed of a second material that has a higher thermal conductivity than the first material. The brake body has a generally annular shape with a first axial contact surface. The cooling body is coupled to the first axial contact surface. The cooling body may be in contact with the first axial contact surface around the brake body for a majority of a circumference of the heat dissipation region. The cooling body may be attached to or be an integral part of a carrier coupled to the brake body. The cooling body may include a protrusion.

First claim

The claims are as follows:

1. A brake rotor for a bicycle, the brake rotor comprising:
a brake body formed of a first material and having a generally annular shape with a radially outer friction region and a radially inner heat dissipation region, the heat dissipation region having a first axial contact surface;
a carrier having a coupling region, the carrier configured for transmitting a braking load between the brake body and the coupling region, the carrier including a first cooling body formed of a second material and coupled to the first axial contact surface, the carrier being disposed at least partially within a central opening of the brake body, the carrier having a first contact section in contact with the first axial contact surface, and
a second cooling body disposed at least partially radially overlying the central opening, the second cooling body having a second contact section in contact with a second axial contact surface of the heat dissipation region, the second axial contact surface facing opposite the first axial contact surface on the brake body, and wherein the heat dissipation region of the brake body is disposed between the first contact section and the second contact section,
wherein the second material has a higher thermal conductivity than the first material and the first cooling body includes a protrusion formed therein and configured for heat transfer from the first cooling body comprising an axial surface configured to contact the second cooling body and transfer heat therebetween, and
wherein the first cooling body is in contact with the first axial contact surface around the brake body for a majority of a circumference of the heat dissipation region.

2. A brake rotor according to claim 1 , wherein the brake body comprises a first alignment feature, and the protrusion comprises a second alignment feature, the first and second alignment features corresponding to generate an alignment of the brake body to the carrier.

3. A brake rotor according to claim 2 , wherein the alignment is a rotational alignment of the brake body relative to the carrier about a rotational axis of the brake rotor.

4. A brake rotor according to claim 1 , wherein the first contact section, the second contact section, or a combination thereof are configured and arranged to contact the first axial contact surface, the second axial contact surface, or both, for 360 degrees around the circumference of the heat dissipation region.

5. A brake rotor according to claim 1 , wherein the first cooling body is in contact with the first axial contact surface around the brake body for between 300 degrees and 360 degrees of the circumference of the heat dissipation region.

6. A brake rotor according to claim 1 , wherein the first cooling body is in contact with the first axial contact surface around the brake body for 360 degrees of the circumference of the heat dissipation region.

7. A brake rotor according to claim 1 , wherein the second material is aluminum or an aluminum alloy.

8. A brake rotor according to claim 1 , wherein the first material is a stainless steel.

9. A brake rotor according to claim 1 , wherein the braking load results from a braking force applied to the friction region.

10. A brake rotor according to claim 1 , wherein the coupling region of the carrier is configured for mounting to a hub of a wheel of the bicycle.

11. A brake rotor according to claim 1 , wherein at least a portion of the first cooling body of the carrier radially overlaps the heat dissipation region of the brake body.

12. A brake rotor for a bicycle, the brake rotor comprising:
a brake body formed of a first material and having a generally annular shape with a first axial surface and a second axial surface opposite the first axial surface;
a carrier formed of a second material and coupled to the brake body such that one or more first contact sections of a first cooling body of the carrier contact the first axial surface of the brake body, the cooling body including a protrusion formed of the second material; and
a second cooling body formed of a third material and coupled to the brake body such that one or more second contact sections of the second cooling body contact the second axial surface of the brake body, the protrusion of the cooling body configured to contact the second cooling body to transfer heat therebetween,
wherein at least one of the second material or the third material has a higher heat conductivity than the first material of the brake body.

13. A brake rotor according to claim 12 , wherein the brake body further comprises:
a central opening;
an outer periphery;
an inner periphery facing radially inward around the central opening;
an attachment portion adjacent the inner periphery; and
a braking portion disposed radially outward of the attachment portion.

14. A brake rotor according to claim 13 , wherein the attachment portion has a first thickness between the first axial surface and the second axial surface and the braking portion has a second thickness between the first axial surface and the second axial surface, the first thickness being less than the second thickness.

15. A brake rotor according to claim 14 , wherein a second braking surface of the braking portion and a second contact surface of the attachment portion on the second axial surface are co-planar with one another, and wherein a first braking surface of the braking portion and a first contact surface of the attachment portion on the first axial surface are not co-planar with one another.

16. A brake rotor according to claim 15 , wherein the one or more first contact sections of the carrier contact the attachment portion on the first axial surface of the brake body, the one or more second contact sections of the second cooling body contact the attachment portion on the second axial surface of the brake body.

17. The brake rotor according to claim 15 , wherein the carrier and second cooling body contact one another in a mating region that is radially inward of an inner edge of the braking portion.

18. A brake rotor according to claim 15 , wherein the carrier and second cooling body are joined to one another and to the brake body via fasteners through the attachment portion, the second cooling body, and the carrier.

19. A brake rotor according to claim 13 , further comprising a plurality of attachment features formed into the inner periphery of the brake body, wherein the attachment portion is disposed between the one or more second contact sections and the one or more first contact sections, and wherein the second cooling body and the carrier are joined to one another and to the brake body by fasteners through the plurality of attachment features, whereby the plurality of attachment features are configured to permit relative radial expansion between the brake body and the second cooling body and carrier.

20. A brake rotor according to claim 12 , wherein the brake body comprises a first alignment feature, and the protrusion comprises a second alignment feature, the first and second alignment features corresponding to generate an alignment of the brake body to the carrier.

21. A brake rotor according to claim 20 , wherein the alignment is a rotational alignment of the brake body relative to the carrier about a rotational axis of the brake rotor.

22. A brake rotor according to claim 12 , wherein the second material is aluminum or an aluminum alloy.

23. A brake rotor according to claim 12 , wherein t

Assignees

• Sram Llc

Inventors

• Dunlap Charles
• Snead Braden

Classifications

• F16D2065/136

  with relative movement radially · CPC title

• F16D65/125

  characterised by the material used for the disc body · CPC title

• F16D2200/0026

  Non-ferro · CPC title

• F16D2065/1392

  Connection elements · CPC title

• F16D65/123

  comprising an annular disc secured to a hub member; Discs characterised by means for mounting · CPC title