JPS6149105U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a front cross-sectional view of a main part of a hydraulic cylinder according to an embodiment of the present invention, and FIG. 2 is a front cross-sectional view of a main part showing one operating state of the same cylinder. 3 to 5 are front sectional views of main parts of hydraulic cylinders according to other embodiments of the present invention. FIG. 6 is a front sectional view of a main part of a hydraulic cylinder according to another embodiment of the present invention, and FIG. 7 is a view taken in the direction of the arrow in FIG. 6. 15, 88: cylinder body, 16: piston,
28, 92, 128, 146: retainer, 52,
114, 138: Output rod, 56: Pin, 60
: Inner wall surface, 62: Bottom surface, 64: Rear end surface, 68: Lock surface, 70, 116, 118, 144: Cam surface, 72, 130, 154: Accommodation hole, 74, 124
, 126: Ball, 76, 120, 122, 16
8: Gap, 80, 132, 134, 162: Ball drive surface, 90: Piston rod.

Claims (1)

[Claims for Utility Model Registration] A fluid pressure cylinder comprising a cylinder body and an actuating member such as a ram or piston that is fluid-tightly fitted into the cylinder body and moved in a linear direction by the pressure of fluid supplied to the cylinder body. an output member provided to be reciprocally movable in a direction parallel to the moving direction of the actuating member; a locking surface formed on the cylinder body or a member fixed thereto in parallel to the moving direction of the actuating member; a cam surface that is fixedly provided to the output member and forms a wedge-shaped gap with the lock surface that changes in width in the direction of movement of the output member; and a cam surface that is arranged to be able to bite into the wedge-shaped gap. a ball that is fixedly provided with respect to the actuating member and moves with it, holds the ball movably in a direction parallel to the direction of movement of the ball, and is caught in the wedge-shaped gap; a ball retainer including a ball drive surface that drives the balls to come into contact with the balls and release the balls; an elastic member that biases the balls in the direction of the balls; and between the output member and the actuating member. and when the actuating member moves in a first direction that results in the ball drive surface disengaging the ball, they abut each other after disengaging and move the output member together with the actuating member. a first abutting portion that contacts each other when the actuating member moves in a second direction opposite to the first direction, and a second abutting portion that causes the output member to move in the second direction together with the actuating member. When a load is applied to the output member in the first direction, a locking function based on the biting of the ball prevents the output member from moving in the first direction; When the actuating member moves in the first direction, the output member is moved in the first direction together with the actuating member by releasing the ball from the ball driving surface and contacting the first contact portion. Fluid pressure cylinder with functions.