| 摘要 |
PURPOSE: An electric tool is provided to prevent a wear of parts and a generation of noise and to extend a lifetime of the tool by installing a hydraulic motor for generating a large torque, and by providing a lubrication operation at a friction portion. CONSTITUTION: A hydraulic motor(20) is installed at an inside of a case. A hydraulic supply and recover pipes(14,15) are extended and installed at backside of the hydraulic motor(20). The hydraulic supply and recover pipes(14,15) are connected at a tube pipes(16,17). An axis(21) of the motor(20) is extended forward, and a first bevel gear(22) is installed at the end portion thereof. The axis is supported rotatably at an inside of the case(10) by a bearing(23). A rotating axis(24) is installed perpendicularly at the inside of the case(10) with regard to the axis(21). An upper portion and a lower portion of the rotating axis(24) are supported rotatably to the case(10) by a bearings(26,28). A second bevel gear(25) fitted to the first bevel gear(22) is installed at a body of the rotating axis(24) and is changed a transferring direction of a power at a right angle.
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