| 摘要 |
A hydraulic wrench comprises an integrally cast housing having a first housing portion and a second elongated housing portion extending transverse to the first portion and forming a cylinder in which a piston is reciprocably mounted. A shaft extending transverse to the axis of the cylinder is turnably mounted in the first housing portion and carries at one end projecting beyond the housing an exchangeable socket for engaging a polygonal head of a threaded connector to be turned by the wrench. The shaft is turned in one direction during reciprocation of the piston over a ratchet mechanism interconnected between the piston rod and the shaft, whereby during such turning of the shaft and the connector engaged by the socket a force is created tending to turn the housing in the opposite direction. To counteract this force, a plate extending substantially parallel to the shaft is connected to the second housing portion and engages a fixed abutment adjacent the connector to be turned. |
