Browse Prior Art Database

Actuator Incorporating a Compact Crash Stop And Transport Latch

IP.com Disclosure Number: IPCOM000099583D
Original Publication Date: 1990-Feb-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 71K

Publishing Venue

IBM

Related People

Dickie, HG: AUTHOR [+4]

Abstract

In a known type of linear actuator wherein a carriage runs along one or more guide ways, it is common practice to provide means to prevent movement of the carriage assembly during transportation and, in the event of an access failure, to provide a means to halt movement of the carriage at both extremities of travel.

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Actuator Incorporating a Compact Crash Stop And Transport Latch

       In a known type of linear actuator wherein a carriage
runs along one or more guide ways, it is common practice to provide
means to prevent movement of the carriage assembly during
transportation and, in the event of an access failure, to provide a
means to halt movement of the carriage at both extremities of travel.

      Prior art describes the use of crash stops to limit the extent
of travel and also the use of a solenoid/latch mechanism to prevent
movement during transportation.  This article discloses an actuator
assembly which uses both of these methods but in a way which reduces
the number of parts required and does not significantly increase the
overall size of the actuator assembly.

      Figs. 1 and 2 show the actuator assembly in which a stop
bracket 20 including a crash stop 22 is mounted on the back of the
core 30 of the actuator assembly, the crash stop extending into the
body of the core.  A stop plate 42 is mounted on the rear of the
carriage assembly 40.  At the forward extremity of travel, the
carriage assembly is stopped by the impact of the stop plate on the
rear of the crash stop.  At the backwards extremity of travel, the
carriage assembly is stopped by the collision of the body of the
carriage with the front of the crash stop.  The crash stop is
positioned so that the stopping force is coincident with the center
of gravity of the carriage in order to reduce the a...