The Involute Cam Rotary Actuator for Hydraulic Servomechanisms
Abstract
The article shows that a rotary hydraulic actuator, by virtue of a symmetrical involute cam rocker arm, will offer the following attractions to designers: no backlash and high stiffness; no rotary high pressure fluid seals, no high starting or running friction; zero pressure angle; angular motion directly proportional to linear motion; constant torque throughout full range of motion; simplicity, economy and reliability. Through examples illustrating several basic types, the fundamental design procedure is presented, together with instructions for calculating all pertinent dimensions. Material selection (that oft-neglected subject) is discussed, and a few 'timely hints' of practical consideration is offered.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1958
- Accession Number
- AD0626652
Entities
People
- L. H. Schwerdtfeger
Organizations
- Johns Hopkins University