Title:
PRIME MOVER ROTATIONAL SPEED CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/1996/028651
Kind Code:
A1
Abstract:
A prime mover rotational speed control device that can not only improve the reliability and stability of a rotational speed control but also remarkably reduce power consumption by imparting an electric motor such as a stepping motor a mechanical retaining force by a worm gear. The device is provided between a governor lever (3) of a governor (2) and an output shaft (21A) of a stepping motor (21) a reduction gear (22) comprising a worm gear (25) comprising in turn a worm (23) and a worm wheel (24) and a rotating lever (27) connected to a rotating shaft (26) of the worm wheel (24) at its proximal end and to the governor lever (3) via a link (7) at its distal end, and the worm (23) is integrated with the output shaft (21A) of the stepping motor (21). In a case where the stepping motor is out of step, the revolution of the worm gear (25) is automatically restricted by virtue of a self-locking action acting between the worm (23) and the worm wheel (24).
Inventors:
NAKAMURA KEIICHIRO
SUNAMURA KAZUHIRO
TAKEGAHARA HIDEFUMI
YOSHINAGA SHIGEHIRO
SUNAMURA KAZUHIRO
TAKEGAHARA HIDEFUMI
YOSHINAGA SHIGEHIRO
Application Number:
PCT/JP1996/000671
Publication Date:
September 19, 1996
Filing Date:
March 15, 1996
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
International Classes:
F02D31/00; (IPC1-7): F02D1/08; F02D11/10
Foreign References:
| JPS5797130U | 1982-06-15 | |||
| JPS63128249U | 1988-08-22 | |||
| JPH05180054A | 1993-07-20 |
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