Title:
ELECTRIC CYLINDER
Document Type and Number:
Japanese Patent JP3389961
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To minimize a load applied to a thread mechanism in starting the movement of an object by simultaneously applying a driving force by a thread mechanism and a force by a booster to an expansion rod in starting to move the object by installing the booster to the expansion rod.
SOLUTION: A motor 9 is started to move an object and, at the same time, a shut-off valve 19 and a check valve 17 are opened, then a rotating force of the output shaft of a motor 9 is transmitted to a thread shaft 4 of a ball thread mechanism 3 through a transmission mechanism 10, and the thread shaft 4 begins to rotate. Accordingly, a nut 5 of a ball thread mechanism 3 begins to move to the right and left while its rotation is prevented by a slider 12 and a rail member 11 and, at the same time with this, an output rod of a booster 14 is pushed out to the right and left by pressure oil of an accumulator 20, a projected member 13 is pushed out to the right and left by a booster 14, an expansion rod 6 is moved to the left by receiving an auxiliary force by the booster 14 and is expanded. By doing this, a load acting to the thread mechanism in starting can be minimized.
Inventors:
Kunimasa Kimura
Shigehiro Toyoda
Isao Murata
Shigehiro Toyoda
Isao Murata
Application Number:
JP4047696A
Publication Date:
March 24, 2003
Filing Date:
February 02, 1996
Export Citation:
Assignee:
Shinto Industry Co., Ltd.
International Classes:
B65G25/08; F16H25/20; H02K7/06; (IPC1-7): H02K7/06; B65G25/08
Domestic Patent References:
| JP5834557U | ||||
| JP7274437U |