JPS62172563U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing one embodiment of the present invention, and FIG. 2 is a cross-sectional view (--cross-sectional view in FIG. 3) showing the main parts thereof. Figure 3 is the same as Figure 2.
FIG. 4 is a cross-sectional view of FIG. 3. 5 and 6 are explanatory diagrams for explaining the clutch mechanism of FIG. 2, respectively. 10: Device body, 14: Fixed jaw, 20: Movable body, 22: Spindle, 24: Movable jaw, 2
6: rotating shaft, 30: handle, 32: connecting member,
40: Screw mechanism, 42: Clutch mechanism, 56: Sleeve member, 58, 60: Helical gear, 62, 6
4, 110, 112: Block member, 94: Piston member (second piston), 102: Stepped surface (
(Pressure receiving surface), 104: Main hydraulic chamber, 118: Piston member (first piston), 120: Sub-hydraulic chamber, 1
22: Oil passage, 126: Front end surface (pressure surface).

Claims (1)

[Claims for Utility Model Registration] A device body equipped with a fixed jaw, and a movable jaw movably provided on the device body for clamping a predetermined object between the fixed jaw of the device body. a movable body, rotatably supported by one of the device main body or the movable body, and screwed to the other of them,
a spindle that moves the movable body relative to the apparatus main body by rotation; a rotating shaft to which a rotational force is applied, which is rotatably held by a member on which the spindle is rotatably supported; interposed between the rotating shaft and the spindle,
a direction changing mechanism that transmits the rotation of the rotating shaft to the spindle while changing the direction; and an output of the rotating shaft or the direction changing mechanism that is interposed between the direction changing mechanism and the rotating shaft or the spindle. a connecting member that is screwed to the member by a predetermined screw mechanism, and is connected to the direction changing mechanism or the input member on the spindle side so as to be non-rotatable relative to the input member and movable in the axial direction; A screw mechanism is provided between the connecting member and the rotating shaft or the output member on the direction changing mechanism side, separately from the screw mechanism, and prevents relative rotation between the connecting member and the rotating shaft or the output member on the direction changing mechanism side. The rotational force of the output member on the rotating shaft or the conversion mechanism side is transmitted to the connecting member, and after the rotational load of the spindle reaches a predetermined magnitude, the rotational force is not transmitted to the connecting member. blocking and allowing the connecting member to rotate relative to the rotating shaft or the output member of the direction changing mechanism,
a clutch means that allows the connecting member to move relative to the rotating shaft or the output member on the direction changing mechanism side in the axial direction based on the screw feeding action of the screw mechanism; It has an enclosed hydraulic pressure chamber and a pressurizing surface facing the hydraulic chamber, and is moved toward the pressurizing surface as the connecting member moves based on the screw feeding action of the screw mechanism, and the hydraulic pressure is A first piston that generates hydraulic pressure in a chamber, and a pressure receiving surface that faces the hydraulic pressure chamber and has a larger area than the pressure applying surface of the first piston, and is based on the hydraulic pressure that is applied to the pressure receiving surface. and a second piston for pushing out the spindle in the direction of clamping the object.