JPH0570811U - Chuck device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a chuck device that can satisfactorily hold a work having an uneven thickness or a work having an irregular outer shape. A work receiving surface 4 is provided at a central portion of a chuck base 1, and a rod 2 protruding and retracting while rotating is provided outside the work receiving surface 4, and a work W is attached to the rod 2 by the work receiving surface 4. The holding claw 3 is provided to be held by.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chuck device that holds a work having a non-uniform thickness or an irregular outer diameter.

[0002]

[Problems to be solved by conventional techniques and devices]

 In the chuck device that has been conventionally proposed to hold the outer shape of a work, a work having a regular outer shape, for example, a work having a circular outer shape can be held without any support, but if the outer shape is irregular, good holding cannot be performed.

Further, if the work is thin, the work may be deformed by being held.

The present invention has a technical problem of providing a chuck device that solves such a problem.

[0005]

[Means for Solving the Problems]

 The gist of the present invention will be described with reference to the accompanying drawings.

A work receiving surface 4 is provided in the central portion of the chuck base body 1, and a rod 2 projecting and retracting while rotating is provided outside the work receiving surface 4, and a work W is attached to the work receiving surface on the rod 2. The present invention relates to a chuck device characterized in that a holding claw 3 for holding the holding device 4 is provided.

[0007]

[Action]

 The work W is held by the work receiving surface 4 and the holding claws 3 provided on the rod 2 by immersing the rod 2 while rotating it.

[0008]

【Example】

 The drawings illustrate one embodiment of the present invention and are described below.

A through hole 8 is formed in the center of the chuck base body 1, and a cylindrical body 9 is inserted and fixed in the through hole 8 from the base end side of the chuck base body 1.

Further, a receiving member 6 is fixed to the tip surface of the chuck base body 1, and an annular member 5 is projectingly provided on the outer periphery of the receiving member 6 on the right side in FIG. The surface is set as the work receiving surface 4.

An inner cylindrical body 7 is provided at the center of the receiving member 6 on the left side in FIG. 2, and the inner cylindrical body 7 is inserted into the cylindrical body 9.

Outside the outer edge of the receiving member 6, the chuck base 1 is provided with two rods 2 facing each other independently of each other by separate cylinder portions 10, and these rods 2 are A holding claw 3 is fixed to the tip portion with a bolt 11. The holding claw 3 is appropriately set in consideration of the size of the work W.

The cylinder portion 10 is composed of a cylinder 12 and a piston 13, and the rod 2 is connected to the piston 13. Reference numeral 14 is a fastening nut.

A spiral groove 15 for rotating the holding claw 3 by 90 ° is recessed on the outer peripheral surface of the rod 2, and a linear groove 21 for linearly sliding the holding claw 3 is recessed in the spiral groove 15 in an extended state. A ball 16 which is in contact with the spiral groove 15 or the straight groove 21 and rotates about its axis is provided on the chuck base 1 side.

Reference numeral 17 is a positioning pin that determines the position of the work W received by the work receiving surface 4, reference numeral 18 is a positioning screw that determines the position of the work W together with the positioning pin, reference numerals 19 and 20 are oil passages, reference numeral 22 and 23 is an oil passage pipe.

Since this embodiment has the above structure, the following operational effects are exhibited.

First, an annular work W having a non-uniform thickness whose both end surfaces are finished is pressed and brought into contact with the work receiving surface 4 while the work W comes into contact with the positioning pin 17. In this state, each rod 2 is in the most protruding state from the chuck base body 1, and the holding claw 3 of the rod 2 is in a state of being rotated by 90 ° from the central direction of the chuck base body 1.

Subsequently, the positioning screw 18 is adjusted so that the work W is positioned and held by the positioning pin 17 and the positioning screw 18.

In this state, when hydraulic fluid is sent from the oil passage 20 to the right side of each piston 13 in FIG. 2 through the oil passage 22 by the hydraulic device (not shown), the rod 2 causes the ball 16 and the spiral groove 15 to move. While rotating by 90 degrees, immerse into the chuck base 1 side. By the 90 ° rotation of the holding claws 3, the respective holding claws 3 face the center side of the chuck base body 1.

From this state, the balls 16 and the linear grooves 21 linearly retract the rods 2 toward the chuck base 1 side, and the work W is held by the respective holding claws 3 and the work receiving surface 4. To be done.

When the hydraulic fluid is introduced from the oil passage 19 to the left side of the piston 13 in FIG. 2 via the oil passage 23, the operation of the work W is canceled by the two holding claws 3 of the work W.

Therefore, according to the chuck device of the present embodiment, it is possible to satisfactorily hold a work W having an uneven thickness or a work W having an irregular outer shape.

Since the two rods 2 are actuated by the independent cylinder portions 10, it is possible to set the work holding force of each piston separately by changing the hydraulic pressure receiving area of each piston 13.

Therefore, it is possible to weaken the holding force of the holding claw 3 for holding the thin portion of the work W and increase the holding force of the holding jaw 3 for holding the thick portion.

The extremely simple ball 16 and spiral groove 15 allow the rod 2 to be projected and retracted while rotating, so that the cost is reduced and the mass productivity is excellent.

Although the chuck device according to the present embodiment illustrates the case where the number of rods 2 is two, the number of rods 2 may be any number. For example, when the number of rods 2 is one, the rods are attached to the rods 2. The shape of the holding claw 3 is appropriately designed such as a V-shaped front surface so that the work W can be held properly.

[0027]

[Effect of the device]

 Since the present invention is configured as described above, it is a chuck device that can satisfactorily hold a work having a non-uniform thickness or a work having an irregular outer shape.

[Brief description of drawings]

FIG. 1 is a front view of this embodiment.

FIG. 2 is a sectional view taken along the line AA in FIG.

[Explanation of symbols]

 W Work 1 Chuck base 2 Rod 3 Holding claw 4 Work receiving surface

Claims (1)

[Scope of utility model registration request] 1. A work receiving surface is provided in a central portion of a chuck base body, and a rod which is projected and retracted while being rotated is provided outside the work receiving surface, and the work is held by the rod with the work receiving surface. A chuck device having claws.