Unitary bracket for mounting a brake assembly and brake actuator
A bracket for a brake assembly and a brake actuator includes a unitary body including a tube configured to receive a camshaft of the brake assembly and an actuator mounting arm disposed proximate a first end of the tube and configured to receive the brake actuator. In some embodiments, the tube includes one or more helical ribs formed on a radially inner surface. The bracket further includes either a brake spider or a brake spider mounting flange disposed proximate a second end of the tube. In either embodiment, material may be omitted in various locations to reduce the weight of the bracket. The bracket may be formed through an additive manufacturing process and in a manner that achieve at least one of a predetermined torsional stiffness and attenuation of a predetermined natural frequency.
1. A bracket for mounting a brake assembly and a brake actuator, comprising:
a unitary body including
a tube configured to receive a camshaft of the brake assembly;
an actuator mounting arm disposed proximate a first end of the tube, the actuator mounting arm configured to receive the brake actuator; and,
a brake spider mounting flange disposed proximate a second end of the tube, the brake spider mounting flange configured to receive a brake spider of the brake assembly
wherein a radially inner surface of the tube defines at least one radially inwardly projecting helical rib.
2. The bracket of claim 1 wherein the radially inner surface of the tube defines a plurality of radially inwardly projecting helical ribs.
3. The bracket of claim 1 wherein first and second ends of the at least one radially inwardly projecting helical rib are spaced from corresponding first and second ends of the tube.
4. The bracket of claim 1 wherein the at least one radially inwardly projecting helical rib comprises a circular helical rib.
5. The bracket of claim 1 wherein a pitch of the at least one radially inwardly projecting helical rib is greater than a length of the tube.
6. A bracket for mounting a brake assembly and a brake actuator, comprising:
a unitary body including
a tube configured to receive a camshaft of the brake assembly;
an actuator mounting arm disposed proximate a first end of the tube, the actuator mounting arm configured to receive the brake actuator; and,
a brake spider disposed proximate a second end of the tube, the brake spider defining a central aperture configured to receive an axle and configured to support a pair of brake shoes for a drum brake
wherein a radially inner surface of the tube defines at least one radially inwardly projecting helical rib.
7. The bracket of claim 6 wherein the radially inner surface of the tube defines a plurality of radially inwardly projecting helical ribs.
8. The bracket of claim 6 wherein first and second ends of the at least one radially inwardly projecting helical rib are spaced from corresponding first and second ends of the tube.
9. The bracket of claim 6 wherein the at least one radially inwardly projecting helical rib comprises a circular helical rib.
10. The bracket of claim 6 wherein a pitch of the at least one radially inwardly projecting helical rib is greater than a length of the tube.
11. The bracket of claim 6 wherein the unitary body further includes at least one gusset extending between a radially outer surface of the tube and an inboard surface of the brake spider, the at least one gusset including at least one weight reduction opening extending therethrough.
12. The bracket of claim 11 wherein the unitary body includes a plurality of gussets, each gusset of the plurality of gussets extending between the radially outer surface of the tube and the inboard surface of the brake spider and including at least one weight reduction opening extending therethrough.
13. A method of manufacturing a plurality of different brackets for mounting a brake assembly and a brake actuator, comprising:
creating three-dimensional models of a first bracket having a first length and a second bracket having a second length different than the first length;
converting the three-dimensional models into program instructions for an additive manufacturing machine; and,
successively depositing layers of material, responsive to the program instructions, using the additive manufacturing machine to form the first bracket and the second bracket, each of the first bracket and the second bracket comprising a unitary body defining
a tube configured to receive a camshaft of the brake assembly; and,
an actuator mounting arm disposed proximate a first end of the tube, the actuator mounting arm configured to receive the brake actuator
wherein the first bracket and the second bracket are configured to have the same torsional stiffness.
14. The method of manufacture of claim 13 wherein a radially inner surface of the tube defines at least one radially inwardly projecting helical rib.
15. The method of manufacture of claim 13 wherein the unitary body further defines a brake spider mounting flange disposed proximate a first end of the tube, the brake spider mounting flange configured to receive a brake spider of the brake assembly.
16. The method of manufacture of claim 15 wherein the brake spider mounting flange includes at least one weight reduction opening extending from a first side of the brake spider mounting flange facing the brake spider to a second side of the brake spider mounting flange facing away from the brake spider, the at least one weight reduction opening configured to remain empty following assembly of the brake spider to the brake spider mounting flange.
17. The method of manufacture of claim 13 wherein the unitary body further defines a brake spider disposed proximate a second end of the tube, the brake spider defining a central aperture configured to receive an axle and the brake spider configured to support a pair of brake shoes for a drum brake.
18. The method of manufacture of claim 17 wherein the unitary body further includes at least one gusset extending between a radially outer surface of the tube and an inboard surface of the brake spider, the at least one gusset including at least one weight reduction opening extending therethrough.
19. The method of manufacture of claim 13 wherein the unitary body is configured to attenuate a predetermined natural frequency.