JPS6315022Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an arbor holder that is attached to a milling machine equipped with an automatic tool changer, for example, and is used to hold the arbor of a tool that has been removed from the main spindle when exchanging cutting tools. .

In conventional arbor retainers of this type, the tapered part of the arbor is inserted into the cylindrical retainer body, and the key on the end face of the retainer engages with the notch in the flange of the arbor to prevent it from rotating. Since the arbor is simply inserted into the retainer by dropping it into the cage, if too much force is applied when attaching or detaching the cutting tool, the arbor will move and become unstable.

There is also a type that fixes the arbor by grasping and pulling in the drawing bolt at the end of the arbor inserted into the retainer, but since the arbor is pulled in using hydraulic pressure, a spring, or a screw mechanism, the structure is complicated and expensive. be.

This invention solves the above-mentioned problems of the conventional arbor retainer for changing cutting tools. The feature is that the arbor can be easily and quickly attached and detached.

The structure of the arbor cage of the present invention will be explained below with reference to the drawings. 1 is a cylindrical cage body that is fixed horizontally on the underframe, etc. on the side of a machine tool, and a seat 3 with a tightening bolt through hole 2 is attached. It protrudes on both the left and right sides.

The retainer body 1 has an inner diameter, length, and inner surface shape capable of receiving and holding the tapered part T of the arbor A, and has a stepped part 5 on the periphery of the opening 4 on the arbor insertion side, against which the flange F of the arbor A comes into contact. A detent key 6 that engages with a notch C in a flange F of the arbor A is attached to at least one location of the annular stepped portion 5 with a bolt 7. Further, a rubber packing-like elastic ring 8 for receiving the flange F is attached to the bottom of the annular stepped portion 5.

An opening 9 from which a drawing bolt B of the arbor A projects is opened on the end surface of the retainer body 1 opposite to the arbor insertion opening 4. An arcuate raised surface 10 is formed along approximately the lower half circumference of the bolt protrusion 9.

A grip handle 1 is attached to the end surface of the main body on the side where the raised surface 10 is located.
A clamp member 12 having a clamp member 1 is mounted on a fulcrum shaft 13 so as to be able to swing along its end surface. There is a notch groove 14 in the center of the clamp member 12 that engages with the lower neck N of the drawing bolt B.
The notch groove 14 is located at the fulcrum shaft 1 of the clamp member 12.
It has an arc shape centered at 3.

The arcuate raised surface 10 and the clamp member 1
The contact edges 15 and 16 of the clamp member 12 are located about 10 degrees above the pivot point (axis) 13 of the clamp member 12 with respect to the horizontal.
They are set so that they abut on a line extending at an angle of degrees.

The contact edges 15 and 16 are formed on slopes facing each other, and the slope is, for example, a 1 mm step.
Set to 10 degrees. The clamp member 12 is attached with a margin to allow some movement in the axial direction of the attachment shaft 13.

Next, to explain the procedure for attaching and detaching the arbor A to the cage body 1, the tapered part T of the arbor A to which the cutting tool M, which has been removed from the main shaft of the machine tool, is
As shown in FIG. 2, with the clamp member 12 raised, insert the clamp member 12 into the main body 1 through the opening 4 until the notch C and the detent key 6 are engaged and the flange F touches the elastic ring 8. Then, the drawing bolt B protrudes from the opening 9 on the opposite side.

By holding the grip handle 11 and lowering the clamp member 12, the arcuate notch groove 14 of the clamp member 12 is engaged with the lower neck N of the drawing bolt B.

When the clamp member 12 is pressed down further, the abutting edges 15 and 16 come into contact with each other, and the clamp member 12 is guided by the slope and moves rearward to pull the drawing bolt B rearward. Clamp member 1
2 completely rides on the raised surface 10 over the slope of the main body 1 side, the elastic ring 8 is compressed by the flange F, and the head of the drawing bolt B and the clamp member 12 are compressed by the repulsive force. With a tight engagement, the arbor A is fixed to the retainer body 1.

The tool M is removed and attached while the arbor A is held and fixed to the cage main body 1 as described above.

When removing the arbor A from the retainer body 1, pull up the clamp member 12 by holding the grip handle 11, and the pulling and fixing action of the arbor A to the main body 1 is released, allowing the arbor A to be easily taken out. .

Since the arbor holder for exchanging cutting tools of the present invention has the above-described structure, the arbor can be easily and quickly attached to and removed from the holder, and the time required for exchanging tools with respect to the arbor can be reduced. In addition, the arbor is securely fixed to the retainer body by the attraction and fixing action against the retainer body, and the locking action caused by the combination of the locking key and the notch, so that the arbor does not need to be removed when attaching or removing tools from the arbor. stable,
In addition to being easy to attach and detach, the fixing mechanism is simple and can be provided at low cost.

[Brief explanation of the drawing]

Figure 1 is a longitudinal sectional front view of the arbor retainer of the present invention in use, Figure 2 is a side view of the clamp member side, and Figure 3 is a side view of the arbor retainer of the present invention in use.
The figure is an exploded perspective view, and FIGS. 4 and 5 are a longitudinal sectional front view and a side view showing the clamped state. A is arbor, T is tapered part, F is flange, B
is the drawing bolt, N is the lower part of the neck, 1 is the retainer body, 4 is the insertion port, 6 is the detent key, 8 is the elastic ring, 9 is the protrusion, 10 is the raised surface, 11 is the grip handle, 1
2 is a clamp member, 13 is a clamp member mounting shaft,
14 is an arcuate notch groove, and 15 and 16 are abutting edges.

Claims (1)

[Scope of utility model registration request] A detent key that engages with a notch in the flange of the arbor is provided on the periphery of the insertion opening of the cylindrical retainer body into which the tapered part of the arbor is inserted, and an elastic ring is arranged to receive the flange. A raised surface surrounding approximately the lower half of the drawing bolt protrusion of the arbor is formed on the end surface opposite to the insertion port of the arbor, and a clamp member with a handle that swings along the end surface is attached with a shaft. The clamp member is provided with a notched groove that engages with the lower part of the neck of the drawing bolt of the arbor in an arc shape centered on the mounting shaft, and the abutment edge of the approximately semicircular raised surface and the clamp member is formed into an inclined surface. Arbor retainer for cutting tool replacement.