Parallel brake (centering)

This document describes the functionality of the mechanism, the basic dimensions, the mounting position, and the design equations and actuated forces.  Useful data (unit conversion), materials and complete manufacturing drawings also included in appendix.

MAIN SECTION

A toggle and a wedge action mechanism compose the parallel brake. The wedge action mechanism changes the direction of the spring force and the toggle one releases the above action (see figure 1, 2 & 3 on appendix).  

FUNCTIONALITY

The preloaded spring (5) by means of a secure nut forces the shaft (1) in wards the brake’s body (2). The taper surface of the shaft (1) forces the ball ends (4) of the two coaxially placed brake pads (3). In this way the spring force redirected to the brake pads. The preload of the spring is adjustable by means of the secure nut (6). When we want to release the brake we turn the toggle lever (8) by means of a wire rope (10) clockwise (default). The toggle lever actuates the toggle link (7), which is pinned with the taper shaft (1), composed this way a 4-bar linkage (inverted, slider block in stationary). The toggle force breaks wedge effect and releases the braking action. An adjusting set screw on the wire rope mounting bracket (10) blocks the lever from turning in toggle position.