JPS5856109Y2 - 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 this conventional method, it is necessary to adjust the tool or size on the machine tool, and when replacing the tip 2, all fixing bolts 7 must be removed and then , it is necessary to tighten each fixing bolt 7 again, and when the head body 1 is replaced, it is necessary to adjust the precision of concentricity before installing the head body 1. It takes a long time to adjust and replace the machine tool, and as a result, the machine tool has to be idle for a long time, which is a significant inconvenience in shortening machining time when mass producing a 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 allows a tool to be easily and quickly attached and detached 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 to 6.

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

A cylindrical fitting portion 1 is provided at the center of the rear end surface of the adapter main body 11.
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 a plurality of fixing bolts 17 passing through the main shaft 10 into threaded holes 18 formed around the distal end surface of the main shaft 10 .

On the other hand, a fitting hole 1 is provided in the center of the tip surface of the adapter main body 11.
9 is formed.

The fitting recess 19a of the fitting hole 19 is inserted into the fitting recess 19a.
It is formed in a tapered shape so that the inner diameter gradually becomes narrower toward the inside, and a locking piece 20 is fitted into this fitting hole 19 so as to be movable in the axial direction.

A locking protrusion 21 is formed at the tip of the locking piece 20.

This locking projection 21 is constructed by combining a rectangular head 21a and a round bar-shaped neck 21b into a T-shape.

Further, a tapered fitting protrusion 22 is protruded from the center of the rear end surface of the head main body 13, and by fitting the fitting protrusion 22 into the fitting recess 19a, the head The main body 13 is centered.

Furthermore, a locking hole 23 into which the locking protrusion 21 engages is formed in the center of the rear end surface of the head body 13.

This locking hole 23 has an opening 23 as shown in FIG.
a is formed in a rectangular shape, a space 23b is formed in a circular shape having a diameter approximately the same length as the long side of the opening 23a, and furthermore, there is a space between the opening 23a and the space 23b. A locking wall portion 24 is formed, and the head portion 21a of the locking protrusion 21 is inserted into the space portion 23b through the opening portion 23a, and the head body 13 is moved approximately 90 degrees.
When rotated by .degree., the head 21a is locked to the locking wall portion 24 of the locking hole 23.

Further, the lock piece 20 has a direction perpendicular to its axis;
That is, a substantially rectangular through hole 25 is formed in the radial direction.

A screw shaft 26 is inserted into the through hole 25, and one end of the screw shaft 26 has a right-hand thread, and the other end has a left-hand thread.

Slide pieces 27 and 27 that slide within the through hole 25 are screwed into each screw of the screw shaft 26, respectively.

In this state, the slide pieces 27, 27 are positioned equally apart from the axis of the lock piece 20 in opposite directions.

Additionally, a tapered portion 2 is provided at the tip of the slide pieces 27, 27.
8.2B is formed.

The tapered portions 2B and 28 correspond to the recessed inclined portions 29 and 29 formed on the inner surface of the fitting body 9 of the adapter body 11, and are slidable by rotating the screw shaft 26. When the pieces 27.27 are separated from each other, the tapered portion 28.28 abuts the inclined portion 29.29 and moves along them, thereby causing the locking piece 20 to move in the axial direction. .

Furthermore, a communication hole 30 is formed in the lock piece 20, and the communication hole 30 communicates the rear end surface with the through hole 25.
A ball 31 that moves outward by the slide pieces 27.27 when the slide pieces 27.27 approach each other is inserted into the inside of the adapter body 11. Pin 32 protruding from the back wall
2, the locking piece 20 is moved to the left in FIG.

Further, an arc-shaped groove 33 is formed at a predetermined position on the peripheral edge of the rear end surface of the head main body 13, and a pin 34 protruding from the peripheral edge position of the distal end surface of the adapter main body 11 is engaged with this groove 33. It is supposed to be done.

The relationship between the groove 33 and the pin 34 is such that when the head body 13 is fastened and fixed to the adapter body 11, the pin 34 is located at one end of the groove 33, as shown in FIG. .

In the figure, 35 is a stopper member that locks the lock piece 20 so that it does not come out from the insertion hole 19, and 36 is a hole for inserting a tool such as a screwdriver for rotating the screw shaft 26. It is.

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, the locking protrusion 21 of the locking piece 20 attached to the adapter main body 11 is inserted into the locking hole 23 provided in the head main body 13, and the head main body 13 is engaged with the adapter main body 11.

That is, as shown in FIG. 5, the head 21a of the locking protrusion 21 is inserted into the space 23b from the opening 23a of the locking hole 23, and the head main body 13 is rotated approximately 90 degrees. move.

At this time, the head portion 21a of the locking protrusion 21 is in a state where it faces and engages with the locking wall portion 24 of the locking hole 23.

Note that at this time, the pin 34 is located at one end of the groove 33.

Thereafter, the screw shaft 26 is rotated using a tool such as a screwdriver to separate the slide pieces 27 from each other.

As a result, the tapered portion 28.28 of the slide piece 27.27
moves along the inclined portions 29.29 formed on the adapter body 11, the head body 13 is drawn toward the adapter body 11 side, and the fitting convex portion 22 of the head body 13 It is fitted into the fitting recess 19a, thereby being firmly fastened and fixed to the adapter main body 11.

Moreover, in this case, the slide piece 27°27 is moved to the lock piece 20.
Since the slide pieces 27 and 27 are equally spaced from each other in opposite directions from the axis of the slide pieces 27 and 27, each slide piece 27 presses the lock piece 20 in a well-balanced manner.

Therefore, the head main body 13 can be firmly fastened and fixed to the adapter main body 11 in a well-balanced manner.

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 27 and 27 approach each other, the ball 31 moves to the right, and when the ball 31 comes into contact with the pin 32, the lock piece 20 moves to the right. 2, and as a result, the locking piece 20 pushes out the head body 13 as shown in FIG.

Note that when the head body 13 is fastened and fixed to the adapter body 11 by forming the groove 33 in the head body 13 and protruding the pin 34 from the adapter body 11 as in the above embodiment,
If the pin 34 is located at one end of the groove 33,
Reproducibility of the mounting state of the head body 13 can be obtained, there is no need to adjust the mounting position every time the head body 13 is attached or detached, and the mounting accuracy of the head body 13 can be ensured.

Furthermore, if the fitting recess 19a is formed on the rear end surface of the head main body 13 as in the above embodiment, centering of the head main body 13 can be easily performed, and the fitting recess 19a can be formed in the fitting hole 19.
The head main body 13 is firmly fastened and fixed to the adapter main body 11 by tightly fitting into the fitting convex portion 22 of the adapter.

Next, a second embodiment will be described based on FIGS. 7 to 9.

Note that the same parts in the figures are designated by the same reference numerals, and their explanations will be omitted.

The adapter main body 11 includes a lock piece 4 as in the first embodiment.
0 is attached.

A through hole 41 is formed in this lock piece 40, and tapered portions (slanted portions) 42, 42 are formed at both ends of this through hole 41.
is formed.

A screw shaft 43 is inserted into this through hole 41 .

A slide piece 44 having a tapered portion corresponding to the tapered portion 42 is integrally formed at one end of this screw shaft 43 .

Further, a slide piece 45 having a tapered portion corresponding to the tapered portion is screwed onto the other end of the screw shaft 43, and this slide piece 45 is connected to the fitting hole 1 of the adapter body 11.
It is fitted into a hole 46 formed on the inner surface of 9.

Further, this slide piece 45 has a key groove 47 formed therein, and is locked with a key 4B so as not to rotate within the hole 46, and one end of the key groove 47 allows the slide piece 45 to It acts as a stopper to prevent it from coming out.

Further, a disc spring 49 is provided on the back wall of the insertion hole 19 to constantly press the lock piece 40 to the left.

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

First, similarly to the first embodiment, the locking hole 23 of the head body 13
The locking protrusion 21 of the locking piece 40 is engaged with the locking piece 40.

Thereafter, when the screw shaft 43 is rotated with a tool such as a screwdriver to bring the slide pieces 44 and 45 closer to each other, the tapered portions of the slide pieces 44 and 45 come into contact with the tapered portions 42 and 42 of the through hole 41. Touch the lock piece 4 to the right in Figure 7.
0, and the head 21a of the locking protrusion 21 is aligned with the locking hole 2.
As a result, the head body 1
3 is fastened and fixed to the adapter main body 11.

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.

Furthermore, in each of the above embodiments, the adapter main body 11 is formed with a fitting hole 19, and the locking pieces 20, 40 are inserted into this fitting hole 19.
However, the present invention is not limited to this. For example, the head body 13 may have a fitting hole 19, and the lock pieces 20, 40 may be inserted into the fitting hole 19. In this case, the locking protrusion 21 of the lock piece 20.40 engages (L23 is connected to the adapter body 1).
What is necessary is to form it on the tip surface of 1.

Further, in the above embodiment, the lock piece 20.40 has a locking protrusion 21.
The locking protrusion 21 is engaged with a locking hole 23 formed in the adapter main body 11 or the head main body 13, but the present invention is not limited to this, for example, A locking hole 23 is formed in the locking piece 20.40, and the locking protrusion 21 that engages with this locking hole 23 is attached to either the adapter main body 11 where the locking piece 20 is not arranged or the head main body 13. There is no problem even if the structure is similar to that of the original.

As explained in detail above, the present invention provides an insertion hole in either one of the adapter main body which is fixed to the main shaft and the head main body which has a tip attached to a predetermined position and is attached to the adapter main body. a locking piece that moves along the axial direction is fitted into this fitting hole, and a locking hole is formed in one of the adapter main body, the head main body, and the locking piece; In a tool holding device in which the lock piece has a locking protrusion that releasably engages with the locking hole, the lock piece has a through hole in a direction perpendicular to its axis, and Insert and place the screw shaft into the
Provided at both ends of the screw shaft are slide pieces for moving the lock piece back and forth toward or away from each other by rotating the screw shaft, and are spaced approximately equally apart from each other in opposite directions from the axis of the lock piece; Furthermore, since the structure is such that an inclined portion is provided at either a predetermined location on the inner surface of the insertion hole or a predetermined location on the inner surface of the through hole, with which the slide piece comes into contact, all that is required is to rotate the screw shaft. The locking protrusion can be reliably locked in the locking hole, and as a result, the head body can be removably fastened to the adapter body, so the tool can be easily and quickly attached and detached. This allows tools to be adjusted or replaced in a short time.
Therefore, the time during which the machine tool is stopped can be shortened, making it possible to improve work efficiency.

In addition, since the two slide pieces are spaced approximately equally apart from each other in opposite directions from the axis of the lock piece, each slide piece presses the lock piece in a well-balanced manner, thus firmly fastening the head body to the adapter body in a well-balanced manner. can do.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing a conventional tool holding device, Fig. 2 is a partially cutaway side view showing a first embodiment of the present invention, and Fig. 3 is a line taken along line III-III in Fig. 2. 4 is a plan view of the lock piece, FIG. 5 is a view taken along the line v-V in FIG. 2, and FIG. Figure 2 is a side view similar to Figure 2, Figure 7 is a side view similar to Figure 2 showing a second embodiment of the present invention, Figure 8 is a side view similar to Figure 7.
-Vnl line arrow view, FIG. 9 is a plan view of the lock piece. 10... Main shaft, 11... Adapter main body, 12... Chip, 13... Head main body, 19... Fitting hole, 20.40...
・Lock piece, 21... Locking protrusion, 23...
...Latching hole, 25°41...Through hole, 26.4
3... Screw shaft, 27.44.45...
Slide piece, 29.42... Inclined part (tapered part), 30... Communication hole, 31... Ball, 32... Pin, 49... ····Disc spring.

Claims (4)

[Scope of utility model registration request] (1) A fitting hole is formed in either the adapter body, which is fixed to the main shaft, or the head body, which has a tip attached to a predetermined location on the tip and is attached to the adapter body. Insert a locking piece that moves along the axial direction into the
A tool comprising a locking hole formed in one of the adapter main body, the head main body, and the lock piece, and a locking protrusion that removably engages with the locking hole in the other. In the holding device, a through hole is formed in the lock piece in a direction perpendicular to its axis, a screw shaft is inserted into the through hole, and the screw shaft is rotated at both ends of the screw shaft. A pair of slide pieces for moving the lock piece back and forth toward or away from each other are provided at approximately equal distances from the axis of the lock piece in opposite directions, and furthermore, a pair of slide pieces are provided at predetermined locations on the inner surface of the insertion hole and between the through hole. 1. A quick-change one-piece holding device, characterized in that an inclined portion is provided on either one of a predetermined inner surface and a predetermined location on which the slide piece abuts. (2) A right-hand thread is formed at one end of the screw shaft, and a left-hand thread is formed at the other end, and a slide piece is screwed into each screw. 1
Quick-change one-piece holding device as described in Section 1. (3) One slide piece is integrally formed on one end of the screw shaft, and the other slide piece is screwed onto the other end of the screw shaft. Quick change type % type % described in item 1 (4) The quick change type 1 according to claim 1, wherein the lock piece is provided with a protruding member that acts to protrude the lock piece when the head main body is removed. Tool holding device.