A pneumatic driven wrench comprises: a housing defining a middle channel; a cylinder defining two fluid passages; a rotor; a first valve; a second valve driven by a valve-switching member for controlling fluid communication between the middle channel and a selected one of the fluid passages; a valve
A pneumatic driven wrench comprises: a housing defining a middle channel; a cylinder defining two fluid passages; a rotor; a first valve; a second valve driven by a valve-switching member for controlling fluid communication between the middle channel and a selected one of the fluid passages; a valve-triggering unit for driving the first valve; and a locking member driven by the valve-triggering unit to move between releasing and locking positions. The locking member engages one of the valve-switching member and the second valve when at the locking position. The locking member is disengaged from the one of the valve-switching member and the second valve when at the releasing position.
대표청구항▼
1. A pneumatic driven wrench having a tool head that is rotatable for driving an object, said pneumatic driven wrench comprising: a housing having first and second sections and a middle section disposed between and interconnecting said first and second sections, said first section defining a inlet c
1. A pneumatic driven wrench having a tool head that is rotatable for driving an object, said pneumatic driven wrench comprising: a housing having first and second sections and a middle section disposed between and interconnecting said first and second sections, said first section defining a inlet channel that is adapted to receive a compressed air therein, said middle section defining a middle channel;a cylinder mounted securely in said second section of said housing, having an inner surface that defines a cylinder chamber, and formed with first and second fluid passages that are in fluid communication with said cylinder chamber and that are angularly displaced from each other;a rotor mounted in said cylinder chamber and adapted to be driven by the compressed air to rotate relative to said cylinder in a first rotational direction when the compressed air passes through said first fluid passage and enters said cylinder chamber and in a second rotational direction when the compressed air passes through said second fluid passage and enters said cylinder chamber;a first valve mounted in said housing and movable between opened and closed positions for controlling fluid communication between said inlet channel and said middle channel;a direction-switching unit including a valve-switching member that is supported on said housing, and a second valve that is mounted in said housing and that is driven by said valve-switching member to rotate relative to said housing between a first angular position, in which said second valve permits fluid communication between said middle channel and said first fluid passage while preventing fluid communication between said middle channel and said second fluid passage, and a second angular position, in which said second valve prevents fluid communication between said middle channel and said first fluid passage while permitting fluid communication between said middle channel and said second fluid passage;a valve-triggering unit supported on said housing, coupled to said first valve, and movable relative to said housing between a non-actuating position and an actuating position to drive movement of said first valve between the closed position and the opened position; anda locking member supported on said housing and driven by said valve-triggering unit to move between a releasing position and a locking position when said valve-triggering unit is moved between the non-actuating position and the actuating position, said locking member engaging one of said valve-switching member and said second valve so as to prevent rotation of said second valve relative to said housing when said locking member is disposed at the locking position, said locking member being disengaged from said one of said valve-switching member and said second valve so as to permit rotation of said second valve relative to said housing when said locking member is disposed at the releasing position. 2. The pneumatic driven wrench of claim 1, wherein said valve-switching member is rotatably sleeved around said housing, is rotatable relative to said housing about a central axis, and is formed with an engaging hole, said locking member being in the form of a bent plate, being slidable along a direction parallel to said central axis, and having a driven end that is driven by said valve-triggering unit, and an engaging end that is disposed in said engaging hole when said locking member is disposed at the locking position and that is disposed outwardly of said engaging hole when said locking member is disposed at the releasing position. 3. The pneumatic driven wrench of claim 2, wherein said valve-triggering unit includes a trigger switch that is supported on said housing and that is rotatable relative to said housing about a switch axis transverse to said central axis, and a linkage that has first and second ends which are respectively pivoted to said trigger switch and said driven end of said locking member so that rotation of said trigger switch can drive movement of said locking member through said linkage, said trigger switch being connected to said first valve in such a manner that rotation of said trigger switch about the switch axis drives movement of said first valve between the closed position and the opened position. 4. The pneumatic driven wrench of claim 3, wherein said valve-triggering unit further includes a valve rod that is connected to said first valve, and a pushing rod that interconnects said trigger switch and said valve rod. 5. The pneumatic driven wrench of claim 1, wherein said valve-triggering unit includes a trigger switch that is supported on said housing and that is rotatable relative to said housing about a switch axis transverse to said central axis, said trigger switch being connected to said first valve in such a manner that rotation of said trigger switch about the switch axis drives movement of said first valve between the closed position and the opened position, said second valve being formed with an engaging hole, said locking member being in the form of a pin and having a pivot end that is pivoted to said trigger switch, and an engaging end, said engaging end of said locking member being disposed in said engaging hole when said locking member is disposed at the locking position and being disposed outwardly of said engaging hole when said locking member is disposed at the releasing position. 6. The pneumatic driven wrench of claim 1, further comprising an annular valve seat secured to said cylinder and disposed between said cylinder and said second valve, said valve seat defining a central recess and first and second conduits that are respectively in fluid communication with said first and second fluid passages, said second valve extending into said central recess and defining a valve channel that is in fluid communication with said first conduit when said second valve is disposed at the first angular position and that is in fluid communication with said second conduit when said second valve is disposed at the second angular position.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.