JPS5920918Y2 - Quick-change tool holding device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a quick-change one-tool holding device for attaching a cutting tool such as a boring tool to the main shaft of a machine tool.

Conventionally, when attaching a tool to the main shaft of a machine tool, for example, as shown in FIG. A cylindrical fitting part 3 protruding from the head body 1 is inserted into a fitting hole 5 drilled in the center of the front end surface of the main shaft 4 of the machine tool, and a plurality of fixing bolts are inserted through the flange part 6 of the head body 1. It was fastened and fixed at 7.

However, in such a conventional method, when replacing the head body 1, it is necessary to remove all the fixing bolts and then tighten each fixing bolt 7 again. Therefore, it is necessary to replace the head body 1. As a result, the machine tool is left idle for a long time.
There is a significant inconvenience in shortening processing time when mass producing a wide variety of products.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tool holding device that can easily and quickly attach and detach a tool without impairing the dimensional accuracy of the cutting edge.

A first embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

As shown in FIG. 2, the tool holding device of the present invention consists of an adapter main body 11 fixed to the main shaft 10 of a machine tool, and a tip 12 fixed to a predetermined position at the tip end so that the position can be adjusted. The head main body 13 is attached to the main body 11.

Adapter body 1] Cylindrical fitting part in the center of the rear end surface]
4 is provided protrudingly, and this cylindrical fitting part 14 is fitted into a fitting hole 15 bored in the center of the distal end surface of the main shaft 10, and a flange part 16 provided at the rear end side of the adapter main body 11. The adapter main body 11 is fixed to the main shaft 10 by screwing the plurality of fixing holes I to 17 passing through the main shaft 10 into the threaded holes 18 drilled around the distal end surface of the main shaft 10. A fitting recess 19 is formed in the center of the distal end surface of 11 .

A tapered recess 19 a is formed at the open end of the fitting recess 19 so that the inner diameter gradually becomes narrower toward the inside of the fitting recess 19 .

Further, a fitting convex portion 21 is formed at the center of the rear end surface of the head main body 13 .

A tapered protrusion 20 that fits into the tapered recess 19a of the fitting recess 19 is formed on the distal end side of the fitting protrusion 21.

The head body 13 is centered by fitting the tapered convex portion 20 into the tapered concave portion 19a.

Further, a through hole (space) 31 is formed on the rear end side of the fitting convex portion 21 in a direction perpendicular to the axis thereof, that is, in a radial direction.

A locking device is inserted into this through hole 31 .

This locking device is composed of a screw shaft 32 and slide pieces 33, 33 screwed onto both ends of the screw shaft 32, respectively.

That is, the screw shaft 32 is inserted into the through hole 31, and one end of the screw shaft 32 has a right-hand thread, and the other end has a left-hand thread.

Slide pieces 33 and 33 that slide within the through hole 31 are screwed into each screw of the screw shaft 32 at positions spaced approximately equal distances from the axis of the fitting convex portion 21 in opposite directions.

Tapered portions 34.34 are formed at mutually opposite ends of the slide pieces 33.33.

The tapered portion 34.34 corresponds to a concave-shaped sloped portion 35.35 formed on the inner surface of the fitting recess 19 of the adapter main body 11 and is inclined in opposite directions to rotate the screw shaft 32. When the slide pieces 33, 33 are moved apart from each other, the tapered portions 34, 34 are aligned with the inclined portion 35.
．． 35 and moves along it, thereby causing the fitting convex portion 21 to move in the axial direction.

Furthermore, a locking recess 36 cut out in a substantially rectangular planar shape is formed in the side wall of the slide piece 33.33.

The locking recess 36 is engaged with a small-diameter round rod-shaped stop 1 to a collar member 37, 37 provided on the head body 13.
It acts as a stopper when the screw shaft 32 is turned, and connects the head body 13 to the adapter body 11. When pouring out the contents, the melee shaft 32 and slide pieces 33, 33 are prevented from coming out.

Furthermore, a communication hole 38 is formed in the fitting convex portion 21 and communicates the rear end surface with the through hole 31.
A ball 39 is inserted into the ball 8 and is moved to the right in FIG. 2 by the slide pieces 33.33 when the slide pieces 33.33 approach each other.
When the head 9 comes into contact with a pin 40 protruding from the back wall of the fitting recess 19 of the adapter main body 11, the head main body 13 is pushed out to the left in FIG.

Further, a hole 28 a is formed at a predetermined position on the peripheral edge of the rear end surface of the head body 13 , and a pin 2 protruding from the peripheral edge position of the distal end surface of the adapter body 11 is inserted into the hole 28 a.
9 are engaged, and when the head main body 13 is fastened to the adapter main body 11, the head main body 13 is always fastened at a predetermined position, so that the reproducibility of the fastened state, that is, the position of the cutting edge of the tip 12 can be obtained. There is.

Note that 41 in the figure is a hole into which a tool such as a screwdriver for rotating the screw shaft 32 is inserted.

Next, the operation of attaching and detaching the tool holding device configured as described above will be explained.

The adapter main body 11 is fixed to the tip end surface of the main shaft 10 in advance with a fixing bolt 17.

Then, while fitting the pin 29 provided on the adapter main body 11 into the hole 28a formed in the head main body 13, the fitting convex portion 21 of the head main body 13 is inserted into the fitting recess 19 of the adapter main body 11. Insert inside.

Thereafter, a tool such as a screwdriver is inserted through the hole 41 and the screw shaft 32 is rotated to separate the slide pieces 33 from each other.

Along with this, the tapered portion 34 of the slide piece 33.33.
34 is a sloped portion 35.3 formed on the adapter body 11.
Move along 5.

At this time, the slide pieces 33 , 33 are provided at substantially equal distances from the axis of the fitting convex portion 21 in opposite directions, and the inclined portions 35 with which the slide pieces 33 , 33 abut, respectively, are provided.
．． Since the inclinations of the head bodies 35 are opposite to each other, the head body 13 is pressed and fixed to the adapter body 11 in a well-balanced manner.

As a result, premature wear of a portion of the tapered recess 19a can be prevented.

That is, when only one slide piece is provided, the fitting protrusion 21 is pressed toward one side of the fitting recess 19, and the tapered protrusion 20 and the tapered recess 19a come into partial contact.

For this reason, only a portion of the tapered recess 19a wears out early, which not only shortens the life of the device, but also causes problems such as deterioration of positional accuracy when fixing the head body 13.

In this regard, in the present invention, the slide piece 33 and the inclined part 3
5 are provided so that the fitting protrusion 21 is drawn into the fitting recess 19 in a well-balanced manner, such a problem does not occur.

Moreover, when removing the head main body 13 from the adapter main body 11, the operation described above may be reversed.

In this case, when the slide pieces 33, 33 approach each other, the ball 39 comes into contact with the pin 40,
The fitting convex portion 21 is moved to the left in FIG. 2, and as a result, the head body 13 is pushed out.

Next, a second embodiment will be described based on FIGS. 4 to 7.

Note that the same parts as in the above embodiment are given the same reference numerals, and the explanation thereof will be omitted.

A fitting groove (space) 41 is formed in the fitting convex portion 21 provided on the head main body 13 .

A locking device is inserted into this insertion groove 41 .

This locking device is composed of a screw shaft 42 substantially similar to that of the above embodiment, and slide pieces 44 and 44 screwed onto both ends of the screw shaft 42, respectively.

That is, the threaded shaft 42 is inserted into the fitting groove 41, and at both ends of the threaded shaft 42 there are slide pieces 44 that slide in l locking holes 43 formed in the adapter body 11. .44 are screwed together.

Convex-shaped sloped portions 45.45 are formed at mutually opposing ends of these slide pieces 44.44, respectively.

These inclined portions 45.45 correspond to recessed inclined portions 46.46 formed on both side surfaces of the fitting convex portion 21 so as to be inclined in opposite directions, and rotate the screw shaft 42. When the slide pieces 44, 44 are moved closer to each other, the convex-shaped inclined portion 45° 45 becomes the concave-shaped inclined portion 46.
．． 46, thereby causing the head main body 13 to move in the axial direction via the fitting convex portion 21.

Next, the operation of attaching and detaching the tool holding device configured as described above will be explained.

First, the fitting protrusion 21 of the head body 13 is inserted into the fitting recess 19 of the adapter main body 11, and the screw attached to the adapter main body 11 is inserted into the fitting groove 41 of the fitting protrusion 21. Insert the shaft 42.

Thereafter, when the screw shaft 42 is rotated and the slide pieces 44.44 are brought closer to each other in the same way as in the above embodiment, the convex-shaped inclined portions 45.45 of the slide pieces 44.44 are brought into contact with the recessed portions. The fitting convex portion 21 is moved to the right in FIG.

Further, when removing the head main body 13 from the adapter main body 11, the above-mentioned operation may be reversed.

In the second embodiment, the head main body 13 and the adapter main body 11 are cylindrically fitted.

In the above embodiment, a fitting convex portion 21 is formed on the head main body 11, and the fitting convex portion 21 is removably fitted into a fitting recess 19 formed on the adapter main body 11. However, the present invention is not limited thereto; for example, a fitting recess 19 is formed in the head main body 13, and a fitting protrusion 21 that fits into the fitting recess 19 is formed in the adapter main body. Of course, it may be of any configuration.

As explained in detail above, the present invention provides a fitting convex portion that is removably fitted into a fitting recess formed on one of the adapter main body and the head main body. A screw shaft is inserted into the fitting convex portion into a space extending orthogonally to the axis thereof, and the screw shaft is rotated at both ends of the screw shaft so as to be mutually connected to each other. A pair of slide pieces that approach each other and move away from each other are provided at approximately equal distances from each other in opposite directions from the axis of the fitting convex part, and these slide pieces are arranged at predetermined locations on the inner surface of the mating recess and at predetermined locations on both sides of the mating protrusion. The head main body is moved in the axial direction and fastened to the adapter main body by abutting on the inclined portions formed on either one of the adapters and tilting in opposite directions, so that the head main body can be easily attached and detached. It can be done quickly, and as a result, the machine tool does not have to be stopped for a long time, which improves work efficiency and prevents premature wear of some of the four mating parts. effective.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing a conventional configuration, Fig. 2 is a partially cutaway side view showing a first embodiment of the present invention, and Fig. 3 is a partially cutaway side view showing a conventional configuration.
The figure is a view taken along the line III-III in FIG. 2, FIG. 4 is a partially cutaway side view showing the second embodiment, and FIG.
6 is a plan view of the fitting convex portion, and FIG. 7 is a side view taken along the line II-II. 10...Main shaft, 11...Adapter main body, 13...Head main body, 19...Fitting recess, 21...Fitting Convex portion, 31...
Through hole (space), 32... Screw shaft, 33...
...Slide piece, 34... Taper part, 35.
... Slanted part, 41 ... Fitting groove (space),
42... Screw shaft, 43... Locking hole, 4
4...Slide piece, 46...Slope part.

Claims (2)

[Scope of utility model registration request] (1) A fitting recess is formed in either one of the adapter main body that is fixed to the main shaft and the head main body that has a tip attached at a predetermined position and is attached to the adapter main body, and the fitting recess is formed in the other one. A fitting protrusion that fits into the fitting recess is integrally formed, and a space extending from one side of the fitting protrusion to the other side is formed in the fitting protrusion so as to be perpendicular to the axis of the fitting protrusion. A screw shaft is inserted into this space, and the head body is pressed and fixed to the adapter body by rotating the screw shaft at both ends of the screw shaft so as to approach or move away from each other. A pair of slide pieces are provided at substantially equal distances in opposite directions from the axis of the fitting protrusion, and furthermore, a pair of slide pieces are provided at predetermined locations on the inner surface of the fitting recess and predetermined locations on both sides of the fitting protrusion. A quick-change type one-tool holding device, characterized in that one of the head bodies is provided with inclined portions inclined in opposite directions to each other, with which the pair of slide pieces abut, respectively, in order to press and fix the head main body. (2) The scope of the utility model registration claim, characterized in that one end of the screw shaft has a right-hand thread, and the other end has a left-hand thread, and a slide piece is screwed into each screw. 1st
Quick-change one-piece holding device as described in Section 1.