Title:
REVERSIBLE POWER WRENCH
Document Type and Number:
Japanese Patent JP3629316
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a pneumatic power wrench, compact, simple in structure, easily operated, and comprising a power transmission integrally provided with a reversible reduction gear shiftable between a forward rotating state and a reverse rotating state.
SOLUTION: A pneumatic power wrench is provided with a reduction gearing 20 shiftable to select the rotating direction of an output shaft and provided with a first planetary gearing 28 engageable in the forward direction of rotation and a second planetary gearing 29 engageable in the reverse direction of rotation. A sun gear 31 of the gearing 28 and a sun gear 39 of the gearing 29 are connected to each other and rotated, and the gearing 29 is provided with an inner set of planetary gears 37 and an outer set of planetary gears 38. Planetary gears 33 of the gearing 28 and both inner and outer sets of planetary gears 37, 38 are journalled on a common planetary gear carrier, and a ring gear 40 is axially shiftable between a forward rotating position in which it is meshed only with the planetary gears 33 of the gearing 28 and in a reverse rotating position in which it is meshed only with the gear set 38 of the gearing 29.
Inventors:
Regal Health
Application Number:
JP28356495A
Publication Date:
March 16, 2005
Filing Date:
October 31, 1995
Export Citation:
Assignee:
ATLAS COPCO TOOLS AKTIE BOLAG
International Classes:
B25B21/00; B25F5/00; F16H3/60; (IPC1-7): B25B21/00
Domestic Patent References:
| JP4060680U |
Attorney, Agent or Firm:
Shigeru Yagida
Takao Hamano
Takao Hamano
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