JPH045203Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to an apparatus for optimally changing a chuck for chucking a workpiece depending on the workpiece.

<Prior Art> A conventional chuck has a structure in which, for example, a shifter that operates a claw that grips a workpiece is directly connected to a piston shaft of an operating hydraulic cylinder.

<<Problems to be solved by the invention>> In the structure of the conventional chuck, the piston shaft of the hydraulic cylinder for actuating the pawl is directly connected to the shifter, etc., so the chuck body and the shifter are integrated.

Therefore, when it is necessary to change the gripping ability of the chuck depending on the workpiece, the chuck is removed from the chuck body and replaced with an optimal grip.

However, replacing these nails is very time-consuming.
Work efficiency is poor.

Therefore, an object of the present invention is to easily replace the chuck according to the workpiece by replacing the chuck main body.

<Means for Solving the Problems> In order to solve the above problems, the present invention connects the base of the draw tube 4 to the connecting piston 10,
A draw nut 11 is screwed onto the tip, flanged protrusions 17 are arranged at regular intervals on the outer periphery of the tip of the draw nut 11, and a recess 6 for locking the ball 13 is provided on the inner peripheral wall, for claw operation. Connect the base to the piston 8,
And the connecting piston 10 and the draw tube 4
A through hole 12 is bored at the tip of the draw bar 5 through which the draw bar 5 is inserted, and engaging protrusions 16 are arranged at regular intervals on the inner wall of the connecting recess 3 provided on the back surface of the chuck body 2. A groove 15 is provided around the tail portion 14 of the pawl actuating body 9 that protrudes from the top, and the ball 13 is located between the notch 6 of the draw nut 11 and the through hole 12 of the draw bar 5.
Or the through hole 12 of the drawbar 5 and the groove 15 of the tail part 14
be able to be inserted freely between the draw nuts 11 and 11;
The flange-shaped protrusion 17 and the engagement protrusion 16 in the coupling recess 3
are characterized in that they can be separated from each other at their inner surfaces 17a, 16a.

<<Operation>> Next, the operation of the present invention will be described based on the embodiment shown in the drawings. After the chuck main body 2 is attached to the main shaft as shown in FIG. Then move it to the left). At this time, the draw nut 11 is also interlocked, and the ball 13 is inserted into the groove 15 provided in the tail part 14 of the pawl actuating body 9.
The ball 13 is dropped into the through hole 1 of the drawbar 5.
2 and the groove 15 of the tail portion 14, and is closed from above by the inner circumferential surface of the drawnut 11.

Therefore, the drawbar 5 and the pawl actuating body 9 are connected by the ball 13, and the pawl actuating body 9 is moved laterally via the drawbar 5 by the operation of the pawl actuating piston 8, thereby opening and closing the pawl.

On the other hand, as the ball 13 is dropped, the inner surfaces 17a and 16a of the flanged protrusion 11 of the draw nut 11 and the engaging protrusion 16 of the chuck body 2 come into contact with each other, so that the draw tube 4 firmly attracts and supports the chuck body 2. That's what I do.

Also, when removing the chuck, draw tube 4
By moving the ball 13 forward, the ball 13 connects the recess 6 of the draw nut 11 and the through hole 1 of the draw bar 5.
2, the engagement between the drawbar 5 and the tail portion 14 of the pawl actuating body 9 is released, and at the same time, the flange-shaped protrusion 17 of the draw nut 11 and the engagement protrusion 16 of the chuck body 2 are separated, and one of them is rotated. By doing so, the chuck body 2 can be removed because it becomes possible to disengage at the non-engaged portion.

Then, insert the new chuck while oriented so that the flanged protrusion 16 of the draw nut 11 and the engagement protrusion 16 of the chuck body 2 do not interfere with each other, rotate it to the hooking position, and then connect the draw tube 4. When the cylinder 10 is moved backward, the ball 13 partially fits into the groove 15 of the tail part 14 of the pawl actuating body 9 of the new chuck body 2, and the draw nut 11
The flange protrusion 17 contacts the engagement protrusion 16 of the chuck body 2 and firmly attaches it to the chuck body 2 to support the chuck body 2.

<<Effects of the invention>> As described above, the present invention allows the chuck main body having a chuck claw according to the workpiece to be replaced extremely easily, and is a highly effective invention.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a double cylinder part showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the connecting part,
FIG. 3 is a longitudinal sectional view of the chuck portion. 2 is the chuck body, 3 is the connecting recess of the chuck body, 4 is the draw tube, 5 is the draw bar, 6 is the concave notch, 8 is the pawl actuating piston, 9 is the pawl actuating body, 10 is the connecting cylinder, 11 is Draw nut, 12 is a through hole, 13 is a ball, 14 is a tail, 1
5 is a groove, 16 is an engaging protrusion, and 17 is a flanged protrusion.

Claims (1)

[Scope of utility model registration request] The base of the draw tube 4 is connected to the connecting piston 10, and a draw nut 11 is screwed onto the tip. Flange-like projections 17 are arranged at regular intervals on the outer periphery of the tip of the draw nut 11, and balls 13 are arranged on the inner peripheral wall. A through hole 1 is provided at the tip of the draw bar 5 whose base is connected to the pawl actuating piston 8 and through which the connecting piston 10 and the draw tube 4 are inserted.
2, the engaging protrusions 16 are arranged at regular intervals on the inner wall of the connecting recess 3 provided on the back surface of the chuck body 2, and the tail 14 of the pawl actuating body 9 protrudes into the connecting recess 3. The groove 15 is provided around the circumference, and the ball 13 is connected to the recess 6 of the draw nut 11 and the through hole 1 of the draw bar 5.
2 or between the through hole 12 and the tail portion 14 of the drawbar 5.
It is characterized in that it can be fitted freely between the grooves 15 of the draw nut 11, and that the flange-like protrusion 17 of the draw nut 11 and the engagement protrusion 16 in the coupling recess 3 can be separated from each other at the inner surfaces 17a and 16a. Chuck exchange device.