JPH0445793Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an adapter for expanding the range of application of an attachment used by being attached to the spindle head of a machine tool.

[Prior art]

When machining is required in the direction of an axis that intersects (perpendicularly perpendicular to) the main axis of a machine tool, attachments that are attached to the main spindle head are used, as is clear from the example shown in Fig. 3. The head 13 is restricted by coming into contact with the upper surfaces of the workpieces W1 and W2, and upward movement is restricted by the stroke upper limit position of the spindle head 13, and a long attachment is difficult to use. For this reason, conventionally, as shown in FIG. 3 a and b, the workpiece W1,
Height H1, H to the center of attachment spindle 2 according to the range of depth L1, L2 of the processing position of W2
I was creating and using multiple types of attachments with different 2 types.

[Problem that the invention attempts to solve]

However, in this conventional technique, it is necessary to prepare a plurality of types of expensive attachments depending on the machining depth range of the workpiece, so there is a problem that the total cost of the attachments increases. The present invention solves the above problem by attaching an adapter to one type of short attachment to change the distance to the attachment main axis.

[Means for solving problems]

For this purpose, the attachment adapter 40 according to the present invention includes a cylindrical adapter body 41 and a connection that extends concentrically through the adapter body and is rotatably supported on the adapter body, as illustrated in FIG. The adapter main body 41 has a first fitting that is removably fitted to a head-side fitting surface 14 that is formed concentrically with the main spindle 15 on the main spindle head 13 of a machine tool that supports the main spindle 15. The attachment body 21 has a surface 42 at one end in the axial direction, and is formed concentrically with the input shaft 30 on the attachment body 21 which supports the input shaft 30 and the attachment main shaft 23 intersecting with the input shaft 30, and is fitted with the head side fitting surface 14. It has a second fitting surface 43 that removably fits with the attachment side fitting surface 22 at the other end in the axial direction, and has a mounting part 41a that is removably fixed to the attachment main body 21, and The connecting shaft 50 has a main shaft tapered hole 1 formed concentrically at the tip of the main shaft 15.
5a, and a locking member 50c that is removably locked to the main shaft. A tapered hole 50b formed at one end and capable of fitting into the main shaft tapered hole 15a and detachably fitting into the input tapered shaft portion 30a only in a specific phase relationship to transmit rotation is provided at the other axial end. It is characterized by:

[Effect]

The adapter 40 connects the tapered hole 50b at the other end of the connecting shaft 50 to the input tapered shaft portion 30 of the attachment.
a in a predetermined phase relationship to connect the connecting shaft 50.
is connected to the input shaft 30, and the second
By fitting the fitting surface 43 into the attachment side fitting surface 22 and fixing the adapter main body 41 to the attachment main body 21 via the mounting portion 41a, the adapter body 41 is attached to the attachment. The distance from to the attachment spindle 23 is extended by the length of the adapter.

[Effect of idea]

As mentioned above, by attaching the adapter of the present invention to the attachment, the distance from the attachment surface to the attachment main shaft head to the attachment main shaft is extended by the length of the adapter, so prepare an adapter of an appropriate length. Accordingly, one attachment can be used as multiple types of attachments having different distances. Since such an adapter is less expensive and smaller than an attachment, the total cost and total storage space of the attachment for performing the required range of processing can be reduced.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the attachment 20 to which the adapter 40 according to the present invention is applied will be explained. As shown in FIG. 1, the attachment 20 includes a cylindrical attachment body 21, an input shaft 30 that is coaxially supported on the attachment body 21, and an attachment main shaft that is perpendicular to the input shaft 30 and supported on the attachment body 21. 23 and bevel gears 24, 25 that interlock both shafts 30, 23 are the main constituent members.
The input shaft 30 consists of an intermediate shaft 31 supported by the attachment body 21 via a ball bearing, and a mounted member 32 provided above the intermediate shaft 31.
2 are movable concentrically and somewhat relative to each other through centering pins 35, and the double-sided chamfered portion 33 at the upper end of the intermediate shaft 31 is connected to the engagement groove 34 at the lower end of the member to be mounted 32.
It is connected so as to engage with and transmit rotation. An input tapered shaft portion 3 is provided on the upper part of the mounted member 32.
0a is formed. The mounted member 32 is biased upward by a spring 36 interposed between it and the intermediate shaft 31, and a groove 37 formed on the upper surface of the flange portion allows the attachment member 32 to be pushed upward when the attachment 20 is removed and stored. Main body 2
The input shaft 30 is locked in a predetermined phase by engaging with a protrusion 26 on the lower surface of an annular block 21b fixed inside the input shaft 30. A tool holder 28 to which a tool T is fixed is attached to the tip of the attachment main shaft 23 via a key 29 in a predetermined phase.

If the adapter 40 of the present invention is not used,
An attachment side fitting surface 22 at the upper end of the attachment body 21 is fitted into a head side fitting surface 14 formed on the spindle head 13 concentrically with the spindle 15,
The L-shaped protrusion 16a at the lower end of the clamp rod 16, which rotates reciprocally and moves up and down, engages with the stepped portion 22a and is attached to the spindle head 13. On the other hand, the input shaft 30 is attached to the spindle head 13 when the keyway 38 of the mounted member 32 is connected to the spindle key 19. After being engaged and phased with respect to the main shaft 15, and the input tapered shaft portion 30a is fitted into the main shaft tapered hole 15a,
Pull stud 30b at the tip of input taper shaft 30a
a locking device 18 actuated via the drawbar 17;
The attachment 20 is connected to the spindle head 15 in a single state.
It is installed on 3. In this state, the half portion 27 of the carby coupling on the top surface of the annular block 21b of the attachment body 21 is connected to the spindle head 13.
The attachment body 21 is prevented from rotating with respect to the spindle head 13 by engaging with half of the carby coupling 45 on the lower surface of the annular block fixed to the annular block, while the attached member 32 moves downward against the spring 36. By releasing the engagement between the groove 37 and the projection 26, the input shaft 30 connected to the main shaft 15 can freely rotate. In this state, the distance from the attachment mounting surface 14a of the spindle head 13 to the attachment spindle 23 is A.

Next, the structure of the adapter 40 will be explained. As shown in FIG. 1, the adapter 40 has a cylindrical adapter main body 41 and a connecting shaft 50 that passes concentrically through the adapter main body 41 and is supported by the connecting shaft 50 as main components. The adapter body 41 has a first fitting surface 42 that removably fits with the head side fitting surface 14 at the upper end, and a first fitting surface 42 that removably fits with the attachment side fitting surface 22 at the lower end. 2 fitting surface 43, and a flange-shaped mounting portion 41 on the outer periphery.
a is formed. The connecting shaft 50 is a connecting shaft main body 51 supported by the adapter main body 41 via a ball bearing.
and an input section 52, and like the intermediate shaft 31 and the attached member 32, both of them 51 and 52 are movable concentrically and relative to each other by a certain distance via a centering pin 55, and the connecting shaft main body 51 The double-sided chamfered portion 53 at the upper end engages with the engagement groove 54 at the lower end of the input section 52 to transmit rotation. Input section 52
A taper shaft portion 50a and a pull stud 50c having the same dimensions as the input taper shaft portion 30a are formed in the upper part of the input taper shaft portion 30a, and a key groove 58 having the same dimensions as the key groove 38 is formed in the lower part.
is formed. A tapered hole 50b having the same size as the main shaft taper hole 15a is formed at the lower end of the connecting shaft body 51, and a connecting key 59 having the same size as the main shaft key 19 is provided in the same phase as the keyway 58.
The input section 52 is also biased upward by a spring 56 interposed between the input section 52 and the connecting shaft main body 51, and when the adapter 40 is removed and stored,
An annular block 41b having a groove 57 formed on the upper surface of the flange portion is fixed to the inside of the adapter body 41.
It engages with the protrusion 44 on the lower surface to lock the connecting shaft 50 in a predetermined phase. The main shaft 1 is attached to the lower end of the main shaft head 13.
Between the lower surface of the annular block fixed concentrically to the annular portion 41b and the annular portion 41b, there is provided a curvature coupling 4 which engages with the annular portion 41b and prevents the adapter body 41 from rotating relative to the spindle head 13 in the installed state.
5 is formed. Such an adapter 40 is smaller in size than the attachment 20, and has a simpler structure, resulting in lower manufacturing costs.

As shown in FIG. 1, the adapter body 41 connects the second fitting surface 43 at the lower end to the attachment side fitting surface 22
The upper end surface 2 of the attachment body 21 is fitted into the upper end surface 2 of the attachment body 21 with a plurality of tightening bolts 46 via the mounting portion 41a.
It is fixed at 1a. On the other hand, the phase of the connecting shaft 50 is determined by the keyway 38 of the attached member 32 engaging with the connecting key 59 provided on the connecting shaft main body 51, and the input tapered shaft portion 30a is inserted into the tapered hole 50b by the biasing force of the spring 36. The input shaft 30 is fitted and connected to the input shaft 30. When the adapter 40 is attached to the attachment 20 in this way, the protrusion 26 on the attachment body 21 side and the groove 37 on the transmission shaft 30 side are similar to when attached to the spindle head 13.
has been disengaged.

FIG. 1 shows a state in which the attachment 20 with the adapter 40 attached is attached to the spindle head 13 in the same way as the attachment 20 alone described above, and the distance from the attachment mounting surface 14a of the spindle head 13 to the attachment spindle 23 is shown in FIG. The distance is A+B, which is longer than the distance A when the attachment 20 is used alone by the length B of the adapter 40.
becomes.

As shown by the two-dot chain line in FIG. 2, an attachment 20 and an adapter 40 are held on the bed 10 of the machine tool by holders 11 and 12. When the machining position of the workpiece is shallow, that is, when only the attachment 20 is attached to the spindle head 13 for machining, the spindle 15 is stopped at a predetermined phase by an unillustrated spindle drive motor controlled by the control device, and the spindle 15 is stopped at a predetermined phase. Move the head 13 from the original position as shown by the solid arrow c and bring it close to the attachment 20 on the holder 11, so that the head side fitting surface 14 and the main shaft taper hole 15a are connected to the attachment side fitting surface 22 and the input taper shaft portion 30a. Fit and clamp rod 16
and actuates the locking device 18 to release the attachment 2.
0 is attached to the spindle head 13, the spindle head 13 is moved as shown by the solid arrow d to return it to its original position, and then moved to a predetermined position to process the workpiece. If the processing position of the workpiece is deep, that is, the adapter 40
Attachment 20 with attached
3, when processing by attaching it to the spindle head 13.
The clamp rod 16 is moved as shown by the broken line arrow e to approach the adapter 40 on the holder 12, and the head side fitting surface 14 and the main shaft tapered hole 15a are fitted to the first fitting surface 42 and the tapered shaft portion 50a. After activating the locking device 18 and attaching the adapter 40 to the spindle head 13, it moves in the direction of the broken line arrow f to approach the attachment 20 on the holder 11 and align the second fitting surface 43 and tapered hole 40b. Fit the attachment side fitting surface 22 and the input taper shaft portion 30a, and tighten the adapter body 41 with the tightening bolt 46.
is fixed to the attachment body 21, and then moved as indicated by the dashed arrow g to once return the spindle head 13 to its original position, and then moved to a predetermined position to machine the workpiece.

In addition, when the adapter body 41 of this embodiment is installed as shown in FIG. 1, the carboxylic coupling 45 is engaged with the adapter body 41, and the adapter body 41 is fixed in phase with the spindle head 13. As the clamp shaft 16 moves downward as shown by the two-dot chain line, the adapter main body 41 also moves downward and the carboxylic coupling 45 detaches, and the adapter main body 41 becomes rotatable and at the same time the protrusion 44 of the annular block 41b is moved downward. It is supported by the groove 57 of the input section 52. In this state, the adapter main body 41 and the attachment main body 21 are rotated to a predetermined phase by the main shaft drive motor (not shown) controlled by the control device via the main shaft 15 and the input section 52, and the clamp shaft 16 is moved upward again. By moving and connecting the carboxylic coupling 45, the attachment spindle 34 is positioned in a new phase. However, the present invention is not limited to this embodiment, and the adapter body 41 may be attached to and detached from the spindle head 13 only at a certain phase. In such a case, the connecting shaft 50 may be one piece, and there is no need to divide it into two parts 51 and 52 as in this embodiment. Further, in this case, the phase of the attachment main shaft 23 can be changed by changing the mounting phase of the adapter body 41 with respect to the attachment body 21.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the attachment adapter according to the present invention, and FIG. 1 is a side view with main parts cut away with the adapter and attachment attached to the spindle head of a machine tool;
FIG. 2 is an explanatory diagram of the procedure for installing the adapter and attachment, and FIG. 3 is an explanatory diagram of the prior art. Explanation of symbols, 13...Spindle head, 14...Head side fitting surface, 15...Main shaft, 15a...Spindle taper hole, 20...Attachment, 21...Attachment main body, 22...Attachment side fitting surface , 23... Attachment main shaft, 30... Input shaft, 30a... Input taper shaft portion, 40... Adapter, 41... Adapter body, 41a... Mounting part,
42...First fitting surface, 43...Second fitting surface, 50
...Connection shaft, 50a...Tapered shaft portion, 50b...
Tapered hole, 50c...Engaging member (pull stud).

Claims (1)

[Scope of utility model registration request] The adapter body includes a cylindrical adapter body, and a connecting shaft that extends concentrically through the adapter body and is rotatably supported on the adapter body, and the adapter body is connected to the main shaft in a spindle head of a machine tool that supports the main spindle. A first fitting surface that removably fits with a concentrically formed head side fitting surface is provided at one end in the axial direction, and the input shaft is attached to an attachment body that supports an input shaft and an attachment main shaft that intersects with the input shaft. The second fitting surface is formed concentrically with the attachment surface and is removably fitted to the attachment side fitting surface that can be fitted to the head side fitting surface. The connection shaft has a mounting portion that can be fixed to the main shaft, and the connecting shaft is removably fitted to a main shaft taper hole formed concentrically at the tip of the main shaft in a specific phase relationship to transmit rotation. and a locking member that is removably locked to the main shaft and has a locking member at one end in the axial direction, and has a specific phase relationship with an input taper shaft portion that is formed at one end of the input shaft and can be fitted into the main shaft taper hole. An attachment adapter characterized by having a tapered hole at the other end in the axial direction that is removably fitted only at the other end in the axial direction and transmits rotation.