JPH0417283Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to a tool attachment/detachment device that can easily and firmly attach a tool to the main shaft of a machine tool.

(B) Prior art Conventionally, an adapter for attaching a tool to a spindle is made up of a main body with a female spline on the inner periphery of the step on the connecting part side, and a movable body with a male spline on the outer periphery of the flange at the base. and a fastening nut having a forward and reverse thread on the inner periphery is screwed into a forward and reverse thread formed on the outer periphery of the presser foot superimposed on the outer end surface of the flange of the movable body and the outer periphery of the main body. The presser foot presses the flange of the movable body against the stepped part of the main body to connect the two, and the tapered centering hole of the main body has a shaft so that centering can be performed in the pressure-welded state. A tool attachment/detachment device including a movable taper ring that slides in the center direction and a plurality of disk springs that receive the movable taper ring is already known from Japanese Utility Model Publication No. 60-24524.

(c) Problems to be solved by the invention The known tool attachment/detachment device has a complicated structure because it requires a presser foot in addition to the main body, movable body, and fastening nut. In order to prevent the presser foot from rotating together when fastening to the main body, multiple holes are drilled in the end face of the main body, pins are inserted and fixed into these holes, and the pins are fitted into the presser foot. A large number of processes such as drilling a plurality of matching holes had to be performed, and the increased number of parts required a large number of man-hours for assembly.

In addition, since the flange of the movable body is crimped and clamped between the end face of the presser foot and the bottom of the stepped part of the main body, it becomes difficult to accurately align the center when the body is clamped. A ring with a tapered inner surface was slidably inserted into the receiving hole, and a plurality of disk springs were inserted to receive the ring, which made the structure even more complicated and was troublesome to assemble. , the cost has become significantly higher.

(d) Means to solve the problem The present invention provides a tapered hole for centering on the mounting side end face of the adapter that connects the adapter to the main shaft of the machine tool, and In this attachment/detachment device, a tapered protrusion that fits into the receiving hole is protruded from the axial center of the attachment/detachment device to couple the tool to the adapter, and the adapter has a screw on the outer periphery and is attached to the tool side. A main body having a plurality of protrusions near the outer periphery of an end face, a ring-shaped movable ring having a plurality of notches on the outer periphery having screws in opposite directions and with which the protrusions engage, and an inner periphery. and a fastening nut having a thread in the opposite direction that is threaded into the thread of the movable ring and a thread in the opposite direction, and which has a tapered protrusion for centering on the end surface of the movable ring on the tool side. The above-mentioned problem was solved by providing a protruding locking means for attaching.

(e) Action The adapter is connected to the main shaft, the tool is attached to the movable ring, and when the notch on the outer circumference of the movable ring is fitted into the protrusion protruding toward the outer circumference of the end face of the main body, the fastening nut is rotated. , the movable ring is pulled and tightened without rotating relative to the main body.

At this time, the tapered protrusion at the rear is press-fitted into a tapered hole drilled in the center of the main body for accurate centering.

(F) Example An example of the present invention will be explained with reference to the drawings.
1 is an adapter that is connected to the end surface of the main shaft 2 of the machine tool, and 3 is a tool that is attached to the other end surface of the adapter 1.The adapter 1 is composed of a main body 1a and a movable ring 1b, and one end of the main body 1a ( An alignment protrusion 4 is provided protruding from the center of the main shaft 2 side), and a plurality of holes 6 through which mounting bolts 5 are inserted are bored near the outer periphery, and screws 7 are cut on the outer periphery.

In addition, a tapered hole 8 is drilled in the center of the other end (tool side) of the main body 1a, a drive pin 9 is fitted on the outside of the hole so that it partially protrudes, and a circular groove 10 is bored near the outer periphery. Notches 11 of a constant width are formed at equal intervals in the circular protrusion formed on the outside of the circular groove 10.
An arc-shaped protrusion 12 is formed between the notches 11 and 11, and the outer diameter of the protrusion 12 is slightly smaller than the portion where the screw 7 is formed.

The movable ring 1b consists of a ring-shaped part 13 that fits into the circular groove 10 and four sector-shaped protrusions 14 that protrude from the outer periphery and movably fit into the notch 11, and is attached to the main body 1a. They fit together so that they do not rotate relative to each other, but move in the axial direction.
On the outer periphery of the fan-shaped protrusion 14, a screw 15 is cut in the opposite direction to the screw 7 on the outer periphery of the main body 1a and has a diameter slightly smaller than that of the screw 7.

Furthermore, four bolt-shaped connecting means 16 are protruded at equal intervals from the end surface of the movable ring 1b on the tool 3 side.

The fastening nut 17 has a larger diameter on the inner peripheral surface of the main body 1a side and a smaller diameter on the movable ring 1b side, and has screws 18 and 19 facing in opposite directions corresponding to the screws 7 and 15.
is engraved, and the outer periphery has a plurality of receiving grooves 22 for hooking the knurling 20 and the rotating tool 21.
has been drilled.

The tool 3 has a tapered protrusion 8a in the center of the end surface of the base that tightly fits into the tapered hole 8 of the main body 1a, and has a circular arc shape near the outer periphery into which the head of the connecting means 16 is fitted and guided. Locking grooves 23 are provided at four locations, and both sides of the portion following the entrance of the locking grooves 23 are U-shaped grooves 23a, and inside the grooves 23a, there is an arc-shaped groove into which the pin 9 is inserted. A long hole 24 is bored.

In addition, there are two cutting blades on the outer periphery and corner of the tip.
5 and 26 are attached, and a chamfering blade 27 is attached near the base.

Furthermore, water guide holes 28 and 29 are formed in the center of the tool 3 and the adapter 1 to communicate with each other, and the water guide hole 28 of the tool 3 is branched to form the cutting blade 2.
5, 26, so the main shaft 2
The cooling water pumped through the water guide holes of the cutting blades 25, 2
It is ejected towards the tip of 6 to cool it.

Next, to explain the action, adapter 1
Insert the alignment protrusion 4 of the main body 1a into the center hole of the main shaft 2 for alignment, and then tighten the mounting bolt 5...
and then tighten the tapered protrusion 8 of the tool 3.
a to the tapered hole 8 of the adapter 1, the large diameter part of the locking groove 23 to the connecting means 16, and the elongated hole 24.
are fitted to the pins 9 respectively, and in this state, the tool 3 is rotated relative to the adapter 1 to fit the U-shaped groove of the locking groove 23 into the head of the connecting means 16, and in this state, the locking mechanism is If the machine tool does not have one, lock the spindle 2, and if the machine tool does not have one, insert a rod into the hole 30 drilled in the outer periphery of the base of the tool 3 to prevent the tool 3 and adapter 1 from rotating before tightening the fastening nut 17. When the ring is rotated in one direction, the screws 18 and 19 in opposite directions carved on the inner peripheral surface thereof engage with the screws 7 and 15 in opposite directions carved in the outer periphery of the fan-shaped protrusion 14 of the main body 1a and the movable ring 1b. Since the movable ring 1
b is drawn toward the adapter 1, and as a result, the end surface of the tool 3 is pressed against the end surface of the main body 1a,
Installation is complete. In addition, in the tightened state, some gap is left between the end surface of the main body 1a and the end surface of the movable ring 1b. That is, by forming the engraved gap, the taper protrusion 8a of the tool 3 can be removed without interposing a ring having a taper hole on the main body side or a disc spring for elastically supporting the ring as in the conventional case.
However, it is possible to press-fit into the tapered hole 8 of the main body 1a and maintain this state.

Further, when removing the tool 3, the above-mentioned installation process is performed in the reverse order.

Furthermore, since there is no fastening means in the center as in the conventional case, a liquid guide hole for cooling can be provided.

(g) Effects of the invention As described above, the present invention connects the movable ring 1b within the end face of the main body 1a so that it can transmit rotation but can move forward and backward, and to make this possible, the outer circumference of the movable ring 1b is By making the screws smaller in diameter than the screws on the outer periphery of the main body and matching the diameters of the screws of the fastening nut 17, the tool 3 can be easily attached to and detached from the movable ring 1b, while still being movable. It is now possible to adjust the ring 1b directly forward and backward with respect to the main body 1a using the fastening nut 17, and there is no need for a presser foot or a means for preventing it from rotating as in conventional ones, which reduces the number of parts, processing man-hours, and assembly. Man-hours can be reduced.

Further, when the movable ring 1b is fastened to the main body 1a by rotating the fastening nut 17 as described above, the thing directly moved by the fastening nut 17 is not the presser foot as in the conventional case, but the movable ring 1b.
b, so the tool 3 attached to the movable ring 1b
Even when the end surfaces of the movable ring 1b and the main body 1a do not overlap, it is possible to press the centering taper protrusion 8a into the tapered hole 8 of the main body 1a for centering, which simplifies the centering mechanism. It is possible to maintain an accurate centering state, and furthermore, the structure is significantly simplified and costs can be reduced.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Figure 1 is a front view, Figure 2 is a side view of the adapter,
Figure 3 is a side view of the tool, Figure 4 is a right side view, and Figure 5 is a side view of the tool.
The figure is a partially cutaway perspective view of the adapter, and FIG. 6 is an exploded perspective view of the same. 1...Adapter, 1a...Main body, 1b...Movable ring, 2...Main shaft, 3...Tool, 7, 15,
18, 19...Screw, 16...Connection means, 23...
...Latching groove.

Claims (1)

[Scope of utility model registration request] A tapered receiving hole for centering is provided on the mounting side end surface of the adapter 1 that connects the adapter 1 to the main shaft 2 of the machine tool, and a tapered receiving hole is provided at the axial center of the mounting side end surface of the tool 3. In the attachment/detachment device in which the tool 3 is coupled to the adapter 1 by protruding a fitting tapered protrusion, the adapter 1 is
A main body 1a having a screw 7 on the outer periphery and having a plurality of protrusions near the outer periphery of the tool side end surface, and a plurality of notches having oppositely oriented screws on the outer periphery and engaging the protrusions on the outer periphery. A ring-shaped movable ring 1b provided with
and a fastening nut 17 having on its inner periphery a screw 19 that screws into the screw 15 of the movable ring 1b and a screw 18 in the opposite direction that screws into the screw 7 of the main body 1a, A tool attaching/detaching device characterized in that a locking means for attaching a tool 3 having a tapered projection for centering is provided protrudingly on an end face of the tool.