JPH0410965Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a collector chuck suitable for facilitating the separation of a sleeve and a collet crimped thereto.

[Conventional technology]

FIG. 4 shows a conventional collector chuck and its surrounding structure.

The collet 11 is held with the tapered portion of its outer periphery pressed against the contact surface 5 of the sleeve 10a,
In order to grip a workpiece (not shown), it is generally formed with a plurality of slotted grooves (not shown). The sleeve 10a is slidably supported within the chuck body 15, and is held movably along its axial direction by a moving means (not shown). Further, since a cover plate 16 is joined to the front side of the collet 11 in contact with the side end surface thereof and is fixed to the main body 15 by bolts 17, the collet 11 is prevented from flying out.

On the other hand, a long hole 13 along the axial direction is provided in the vicinity of the rear end surface 12 of the sleeve 10a, and the main body 15 is screwed into the long hole 13.
A stop 14 is provided which extends in the radial direction of a. The insertion end of the stopper 14 is placed at a position where it can come into contact with the rear end portion 12 of the collector with a slight gap therebetween.

In the conventional technology having the above structure, in order to release the pressure bond between the outer circumferential surface of the collet 11 and the contact surface 5 of the sleeve 10a, the sleeve 10a is first moved to the rear (left side) in the figure by the above-mentioned moving means, and the collet 11 Although the collet 11 operates to release the crimped contact with the collet 11, there may be a case where the collet 11 moves back together with the collet 11. Therefore, by pressing the rear end surface 12 of the collet against the insertion end of the stopper 14 and moving the sleeve 10a in a further backward direction, only the collet 11 is left behind, and the pressure bond between the sleeve 10a and the collet 11 is released. . In addition to the above-mentioned means, a method has also been adopted in which an impact is applied to the collet 11 from the outside to release the crimping.

[The problem that the idea attempts to solve]

In the above-mentioned conventional technology, it is necessary to provide the long hole 13 in the sleeve 10a and attach the stopper 14, which complicates the structure and prevents chips and the like from flowing through the long hole 13 into the sleeve 10a and the collector 1.
1 and therefore collect 11 and sleeve 10.
Problems arise in that the accuracy of contact with a is lowered and the contact surface is damaged. Furthermore, stopper 14
Due to the pressure contact between the collet and the rear end surface 12 of the collet, problems such as damage to the collet 11 and loss of contact accuracy are likely to occur.

The present invention solves the above problems and ensures the crimping between the collet and the sleeve, as well as
To provide a collet chuck which can be easily separated, has a simple structure, prevents chips, cooling water, etc. from entering the collet, and can improve the life of the collet chuck.

[Means to solve the problem]

To this end, the present invention has a plurality of rows of appropriately shaped grooves, some of which are overlapped, on the contact surface of the sleeve that contacts the outer peripheral surface of the collet, within a range that does not protrude from the contact surface. The collector chuck is provided with a communicating groove that communicates with each of the plurality of rows of grooves and also communicates with the grease supply port.

[Effect]

Grease supplied from the grease supply port is introduced into each groove via the communicating groove. As mentioned above, since the groove is sealed in the contact surface in a dead-end state that does not protrude from the contact surface, grease is constantly inserted between the outer peripheral surface of the collet and the contact surface of the sleeve, and the two are pressed together so that they slide easily. . This makes it easy to separate the sleeve from the collet.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in FIG. 1, the collet 11 grips a workpiece W, such as a pipe, with its outer peripheral surface pressed against the contact surface 5 of the sleeve 10.

The sleeve 10 is slidably supported within the main body 15, and is moved along the axial direction by a moving means (not shown) via a connecting pipe 19 screwed into the rear end.
Move within 5. A stopper 21 screwed onto the main body 15 engages with a guide groove 20 on the outer periphery of the sleeve 10 to limit movement of the sleeve 10.

Sleeve 10 that the outer peripheral surface of collet 11 comes into contact with
The contact surface 5 is provided with concave grooves 1a, 1 as shown in FIG.
b, 1c, a communicating groove 2, etc. are formed. The communication groove 2 is connected to a communication hole 4 provided in the sleeve 10.
It communicates with a grease supply nipple 9, which is a grease supply port, through a communication path 8. The grease supply nipple 9 is housed in a recess 18 of the main body 15 and is screwed onto the main body 15.

FIG. 2 shows a developed view of the contact surface 5 of the sleeve 10. In this embodiment, three grooves 1a, 1b, and 1c are formed diagonally, and both ends of the grooves 1a, 1b, and 1c are shaped so that they do not protrude from the side surfaces of the contact surface 5, that is, inside the grooves. The grooves are formed in such a manner as to confine the grease introduced therein, and their ends are arranged so as to overlap each other. On the other hand, the communicating groove is provided in a straight line along the end surface of the contact surface 5 at a position slightly apart from the end surface. The communication groove 2 and the grooves 1a, 1b, and 1c are formed to communicate with each other through communication paths 3a, 3b, and 3c. As described above, in the contact surface 5 there are diagonally overlapping grooves 1a, 1b, 1c and a linear communicating groove 2.
and communication paths 3a, 3b, 3c that communicate these
As shown in the figure, a group of concave grooves are formed without protruding from the contact surface 5.

A communication hole 4 provided in the sleeve 10 is opened in a part of the communication groove 2 . The communication hole 4 communicates with the grease supply nipple 9 via the communication path 8 as described above. When grease is supplied from the grease supply nipple 9 with the above structure, the communication groove 2, the communication paths 3a, 3b, 3c, and each groove 1a, 1b, 1c are filled with grease. Therefore, the outer peripheral surface of the collet 11 and the sleeve 1
Grease is always present between the contact surfaces 5 of 0, and a slippery state is maintained.

Furthermore, as is clear from a comparison between FIG. 1 and FIG. 4, in the case of this embodiment, the elongated hole 13 and the stopper 14
etc., and the structure is extremely simple. Furthermore, since there are no elongated holes 13, etc., chips and cooling water do not enter the sleeve 10 or the collector 11, and furthermore, since there is no need for a stopper 14, no shock is applied to the collector 11.

In this embodiment, in order to detach the collet 11 from the sleeve 10, it is sufficient to simply move the connecting pipe 19 rearward and move the sleeve 10 along the inside of the main body 15, and this can be easily done.

The grooves 1a, 1b, and 1c, the communication grooves 2, and the communication passages 3a, 3b, and 3c can be easily machined using an NC machine tool or the like, and do not require any particular skill or time to process. Of course, as mentioned above, the concave groove 1
Since parts a and the like are of the enclosed type, there is no grease leakage and no impact force is applied, so the accuracy of the collect can be maintained indefinitely and the life of the collect can be extended. Further, as described above, there is no intrusion of chips or cooling water into the collet, and no scratches or the like occur on the contact surface 5 between the collet 11 and the sleeve 10. Furthermore, since the concave groove 1a etc. are formed on the sleeve 10 side, the ready-made collect 11
can be used as is.

FIG. 3 shows a grease groove formed on the contact surface 5 of the sleeve 10, which is different from that shown in FIG. In this case, the concave grooves 6a, 6 bent into a mountain shape
b, grooves 7a and 7b intersecting this groove, and a communication groove 2 communicating with these grooves.
The one shown in FIG. 3 has more grease grooves than the one in FIG. 2, making it more slippery, but of course the one shown in FIG. 2 is sufficient.

Of course, the shape of the grease groove is not limited to that shown in FIGS. 2 and 3, and various other shapes may be adopted.
It is a necessary requirement that each grease groove be formed in a shape that confines grease within the contact surface 5.

[Effect of idea]

As is clear from the above description, according to the present invention, the collection chuck can be easily and smoothly attached and detached due to its simple structure. In addition, chips and cooling water do not enter the collector, and
Since no impact is applied to the collet, there is no fear of scratches, and the accuracy of the collet itself, the accuracy of contact between the collet and the sleeve, and the life of the collet can be improved.

[Brief explanation of drawings]

Fig. 1 is an axial sectional view of one embodiment of the present invention, Fig. 2 is a developed view showing the shape of the grease groove formed on the contact surface of the sleeve, and Fig. 3 is a developed view showing the shape of the grease groove formed on the contact surface of the sleeve. Developed view of other embodiments of grooves, 4th
The figure is an axial sectional view showing a conventional collector chuck structure. 1a, 1b, 1c, 6a, 6b, 7a, 7b...
...concave groove, 2... communicating concave groove, 3a, 3b, 3c, 8
...Communication path, 4...Communication hole, 5...Contact surface, 9...
...Grease supply nipple (grease supply port), 1
0,10a...Sleeve, 11...Collect, 1
2... Rear end surface of the collet, 13... Long hole, 14...
Stoppa, 20... Guide groove, 21... Stoppa.

Claims (1)

[Scope of utility model registration request] On the contact surface of the sleeve that contacts the outer peripheral surface of the collet, a plurality of rows of appropriately shaped grooves are provided within a range that does not protrude from the contact surface, with some of the grooves overlapping each other, and each of the plurality of rows of grooves is communicates with the groove,
A collector chuck characterized in that it is provided with a communication groove that also communicates with a grease supply port.