Procedure for setting the dead travel of a servo-motor for Assistance during braking
US4934249A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Aug 5, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The setting of the dead travel of a servo-motor for assistance during braking is carried out in the factory during its assembly. For this purpose, a subassembly (68) comprising the piston (20), the operating pushrod (30) and its plunger (28), the valve head (34), the springs (38, 40) and the fixed (44) and tilting (50) keys, is placed in a setting sleeve (70). A load (F1) is exerted on the front face of the piston (20) sufficient to maintain a bearing surface (20b) permanently against a reference surface (70a) formed on the sleeve, and the pushrod (30) is freed from the action of the spring (40) by means of a fork (70a) formed on the sleeve, and the pushrod (30) is freed from the action of the spring (40) by means of a fork (72), after having pushed the plunger (28) up against the valve head (34) by applying a load (F3), the movement (.DELTA.) made by the mobile key (50) is measured between the reference surface (170a) and a shoulder formed on the plunger (28). A stop is then calibrated by giving it a length equal to the movement (.DELTA.) measured, less the dead travel desired and this calibrated stop is fixed at the end of the mobile key (50).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.