JPS6334832Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a rotary tool mounting unit that is used by being set on the tool drive spindle of a machine tool, primarily a numerically controlled machine tool (NC machine tool).

This type of rotary tool mounting unit is also provided with a rotation prevention mechanism. That is, a support member for supporting a rotating body having a shank portion at one end and a rotary tool attachment portion at the other end includes a movable pin movable within a certain range parallel to the rotating body, and the movable pin is A spring that biases the shank toward the side thereof and a rotation preventing member that moves in conjunction with the movable pin are provided, and when the movable pin is held at the limit position by the spring, the rotating body is rotated. The rotation prevention member is configured to engage with the rotation prevention engaged portion. When a rotary tool mounting unit equipped with such a rotation prevention mechanism is set on a tool driving spindle on a machine tool side, the movable pin is set to a spring by a rotation prevention block provided on the machine tool side. The rotating body is moved backward a certain distance inward against the rotational force, and the rotation preventing member is disengaged from the engaged portion on the rotating body side, and the rotation prevention for the rotating body is automatically released.

However, there are a wide variety of machine tools that use this type of rotary tool mounting unit, and the position of the detent release block also varies depending on the meter and model. If the amount of protrusion is constant, there is a problem that it can be used only for a specific machine tool, resulting in a lack of versatility.

The present invention provides a rotary tool mounting unit that can solve these problems.
Hereinafter, one embodiment will be described based on the attached illustrative drawings.

In FIG. 1, reference numeral 1 denotes a rotating body, on one end of which a manipulator grip 2 and a shank 3 are concentrically connected, and on the other end a rotary tool mounting portion 4.
are arranged concentrically. Reference numeral 5 denotes a support member that rotatably supports the central portion of the rotating body 1 via a bearing 6, and a rotation prevention mechanism 7 that also serves as a fluid coupling is provided on one side of the support member. This rotation prevention mechanism 7 which also serves as a fluid coupling includes a cylindrical movable pin 9 that is movable in the axial direction of the rotating body 1 and has a check valve 8 therein, and a cylindrical movable pin 9 that is movable in the direction of the shank portion 3. It is composed of a spring 10 that biases the movable pin 9, and a rotation preventing member 11 attached to the movable pin 9.

The cylindrical movable pin 9 has a base 1 fitted into the movable pin fitting hole 12 of the support member so as to be movable in and out.
3, and a length adjusting movable part 14 screwed into the inside of this base part 13, the check valve 8 is housed inside this movable part 14, and the spring 10
is interposed between the spring receiving seat 15 which is locked on the inside near the lower end of the base 13 and the bottom of the movable pin fitting hole 12. Further, a fluid communication port 17 is provided on the side surface near the lower end of the base 13 and communicates with an annular recess 16 formed in the inner circumferential surface of the movable pin fitting hole 12 over an appropriate length in the axial direction. an annular recess 18 formed in the support member 5 so as to surround the support member 1;
and the annular recess 16 are communicated by a communication passage 19, and the rotating body 1 is further provided with a fluid receiving passage 20 communicating with the annular recess 18.

The rotation preventing member 11 is connected to the movable portion 14 so as to come into contact with the outer end of the base portion 13 of the movable pin 9.
The movable portion 14 is fitted loosely into the movable portion 14, and is clamped and fixed to the base portion 13 by a fixing nut 21 screwed onto the movable portion 14. Further, by fitting into the recess 22 formed in the support member 5, the rotation preventing member 11 is configured to be movable only in the axial direction of the rotating body 1 with respect to the support member 5, and the tip thereof is , an engaged portion 2 provided at a position adjacent to the manipulator grip portion 2 of the rotating body 1 by moving integrally with the movable pin 9 that protrudes and moves by a spring 10.
3 to fix the rotating body 1 to the support member 5. The position of the movable pin 9 at this time becomes the limit position. The check valve 8 is composed of a spherical valve body 8a and a spring 8b that biases the valve body 8a in the direction of closing the valve.

According to the above configuration, the movable pin movable part 14 is rotated with respect to the movable pin base 13, and the movable part 14 is rotated with respect to the movable pin base 13.
By moving the movable pin 9 in and out of the base 13 to change the overall length of the movable pin 9, the amount of protrusion of the movable pin 9 relative to the support member 5 can be adjusted within the adjustment range L. Even if the entire length of the movable pin 9 is adjusted, the rotation preventing member 11 is always kept at the movable pin base 13.
By fixing the rotation prevention member 11 with the fixing nut 21 while in contact with the outer end of the rotation prevention member 11, the position of the rotation prevention member 11 relative to the support member 5 can be maintained constant.

The method of using the rotary tool mounting unit constructed as described above may be the same as conventional methods. That is, as shown in FIG. 1, the rotating body 1, which is fixed to the support member 5 by the rotation preventing member 11 fitting into the engaged portion 23 on the rotating body 1 side, is held in a predetermined position by the gripping part 2. It is set via the shank portion 3 onto the tool drive spindle 24 of the machine tool shown in FIG. At this time, the tip of the movable pin 9 of the rotation prevention mechanism 7 (movable The tips of the parts 14) are facing each other, so the shank part 3 is connected to the spindle 2.
4, as shown in FIG. 2, the movable pin 9 comes into contact with the movable pin tip abutting portion 27a of the detent release block 27, and is relatively pressed and moved backward against the spring 10. I am forced to do it.
As a result, the rotation prevention member 11 coupled to the movable pin 9 also moves backward together and separates from the engaged portion 23 on the rotating body 1 side, so that the rotation prevention for the rotation body 1 is released.

FIG. 2 shows that when the tip of the movable pin 9 is at the minimum position of the adjustment range L shown in FIG. Therefore, it is possible to give the movable pin 9 the necessary amount of backward movement. However, as shown by the imaginary line in FIG. If the contact portion 27a is low as shown in position B, adjust the amount of protrusion of the movable pin 9 within the adjustment range L as described above, and attach the rotation stopper 11 to the movable pin 9.
What is necessary is to provide the amount of backward movement necessary to disengage the engaged portion 23 from the engaged portion 23. Even if the tip of the movable pin 9 were adjusted to the maximum position within the adjustment range L, the movable pin tip abutting portion 27a of the detent release block 27 would be too low to provide the movable pin 9 with the necessary amount of backward movement. If this is not possible, it is sufficient to replace only the movable portion 14 of the movable pin 9 with a longer one.

When the movable pin 9 is moved backward and the rotation of the rotary body 1 is released, the rotary body 1 is driven by the spindle 24 and the required machining is performed using the rotary tool attached to the tool attachment part 4. However, if it is necessary to supply oil to the rotary tool set in this tool mounting part 4, the movable pin end abutting part 27 of the detent release block 27 can be used.
By supplying oil at a required pressure to the fluid passage 28 provided in the block 27 so as to open at the end of the movable pin 9, the interior of the interior is removed from the tip of the movable pin 9 that is in pressure contact with the movable pin tip contact portion 27a. The check valve 8 is pushed open and the oil is injected into the movable pin 9, and the oil flows from the fluid flow port 17 through the annular recess 16, the fluid passage 19, and the annular recess 18 into the rotating body 1. The fluid is supplied to the fluid receiving channel 20. The oil supplied into the rotating body 1 in this way is
It is guided to the tool by methods well known in the art.

In the above embodiment, an example was explained in which the fluid coupling function of the rotation stopper mechanism 7 is used to supply oil to a tool attached to the rotating body 1. However, this rotating tool attachment unit itself is a mechanism that requires hydraulic pressure or air pressure. If equipped with such mechanisms, the fluid coupling function can be used to supply oil or air to these mechanisms. In addition, the detent mechanism 7 can also have a function other than a fluid coupling, but it is of course possible to use it exclusively as a detent mechanism.

Further, the method of attaching the rotation preventing member 11 to the movable pin 9 is not limited to the configuration of the above embodiment. 3 and 4 respectively show other mounting methods, and in the configuration shown in FIG. 3, the movable pin base 1
A movable pin movable part 14 is fitted into the movable pin movable part 3 so as to be freely movable, and a rotation preventing member 11 is screwed into the movable part 14 and fixed with a fixing nut 21. In this case, the movable part 14 is rotated relative to the rotation stopper 11 to take it in and out, but since the base 13 comes into contact with the rotation stopper 11 due to the pressing force of the spring 10, the rotation is prevented. The stop member 11 will be held in a fixed position relative to the base 13.

In the example shown in FIG. 4, the fixing nut 21 of the embodiment shown in FIG. 1 is omitted, and the rotation preventing member 11 is directly fixed to the movable pin movable portion 14 by a fixing screw 29. Of course, also in this case, the rotation preventing member 11 is fixed to the movable part 14 at a position where it abuts the outer end of the movable pin base 13.

Note that the rotation preventing member 11 can also be directly fixed to the outer end of the movable pin movable portion 14. In this case, the rotation of the movable pin base 13 is stopped by the rotation preventing member 11, so when the movable pin movable part 14 is screwed into the base 13, it becomes easier to rotate the movable part 14. . Further, the limit position of the movable pin 9 is regulated by the rotation preventing member 11 fitting into the engaged portion 23 on the rotating body 1 side. It is also possible to provide the support member 5 with a stopper for regulating the limit position that acts directly on the support member 11. or,
The rotation preventing member 11 may fix the rotating body 1 by engaging with a gear or the like mounted on the rotating body 1 within the support member 5.

The rotary tool mounting unit of the present invention, as in the above embodiment, includes a base that is biased by a spring, and a length adjusting movable unit that is connected to the base so as to be movable in and out of the base. The amount of protrusion from the support member can be adjusted from the part, and the rotation stopper member is held at a constant position with respect to the base of the movable pin. Even if the position (height) of the movable pin end abutting part of the detent release block is not constant, the position (height) of the movable pin end abutting part
By adjusting the amount of protrusion of the movable pin according to the amount of rotation, the movable pin can be provided with the amount of backward movement necessary for releasing the rotation stop, and the rotation stop can always be reliably released. In other words, even when the detent release block is used for various machine tools in which the position (height) of the movable pin end abutment part is not constant, there is no need to replace the block. Therefore, it can be economically utilized as a versatile rotary tool mounting unit.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal side view, FIG. 2 is a longitudinal side view showing the state of use, and FIGS. 3 and 4 are longitudinal side views of main parts showing modified examples. DESCRIPTION OF SYMBOLS 1...Rotating body, 2...Gripping part for manipulator, 3...Shank part, 4...Tool mounting part, 5
...Supporting member, 7... Rotating prevention mechanism that also serves as a fluid coupling, 8... Check valve, 9... Movable pin, 10... Spring for biasing movable pin, 11... Rotation preventing member, 13... Movable Pin base, 14...Movable pin movable part, 21... Fixing nut, 22... Recess into which the rotation stopper 11 fits, 23... Engaged part on the rotating body side, 24... Spindle, 27... Rotation stop release block, 27a... movable pin tip contact portion.

Claims (1)

[Scope of utility model registration request] A support member supporting a rotating body having a shank portion at one end and a rotary tool attachment portion at the other end includes a movable pin movable within a certain range parallel to the rotating body, and the movable pin is attached to the shank portion. A spring that biases toward a certain side and a rotation preventing member that moves in conjunction with the movable pin are provided, and when the movable pin is held at the end position by the spring, the rotating body is prevented from rotating. In the rotary tool mounting unit in which the rotation preventing member engages with the engaged portion, the movable pin has a base urged by the spring and is movable in and out of the base. and a length adjustment movable part connected to the movable pin, the amount of protrusion from the support member can be adjusted, and the rotation stopper is held at a constant position with respect to the movable pin base. Rotary tool mounting unit with mechanism.