Drum brake camshaft formed with engineered core
US11879510B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 24, 2020 |
| Grant date | Jan 23, 2024 |
| Priority date | — |
| Expiry date | Nov 27, 2041 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2250/0069
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of manufacturing a camshaft for a drum brake includes designing a tubular camshaft and thereafter forming the camshaft as a unitary body through, for example, an additive manufacturing process. The camshaft is designed with a first end portion configured for coupling to a brake actuator, a second end portion defining a cam configured to engage cam followers coupled to first and second brake shoes, rotation of the cam causing the first and second brake shoes to move between positions of engagement and disengagement with an associated braking surface, and an intermediate portion disposed between the first and second end portions. A wall thickness of at least one of the end portions and the intermediate portion is configured to achieve at least one of a predetermined torsional stiffness in the camshaft and vibration damping in the camshaft at a selected frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.