JPS63140392U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 3 are cross-sectional views of a robot wrist collision protection device according to a first embodiment of the present invention, and FIG. 4 is a sectional view of a similar collision protection device according to a second embodiment of the present invention. The cross-sectional view, FIG. 5, is a cross-sectional view of a conventional collision protection device. 1...Cylinder, 3...Free piston, 5...First
port, 6...Push rod, 7...Second port, 9...Divided collector, 10...Blade, 13...
Ball shaft, 15...first fixing part, 16...second fixing part, 17...spring, 18...robot.

Claims (1)

[Scope of utility model registration request] A free piston is slidably installed inside a bottomed cylindrical cylinder that is held in the robot's wrist.
A push rod is slidably inserted through the free piston, a spring is interposed between the free piston and the push rod to relatively bias the push rod toward the cylinder opening, and the spring is inserted into the open end of the cylinder. In this method, a divided collet consisting of a plurality of blades movably arranged in the circumferential direction is mounted so as to be swingable in a plane including the cylinder axis, and a ball shaft having a jig is installed in the divided collet to rotate within the plane. The free piston is provided with a first fixing portion that engages with one end of the split collet to fix the split collet to the cylinder, and the push rod is provided with a first fixing portion that engages with an end surface of the ball shaft. a second fixing part for fixing the ball shaft to the split collet; and a first port for introducing air pressure into the cylinder to move the free piston toward the cylinder opening; and a cylinder bottom of the push rod. A collision protection device for a robot wrist, characterized in that it is provided with a second port that opens following movement to the side.