JPH0340497Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tool holder device for an end mill or the like.

[Conventional technology]

2. Description of the Related Art Various tool holder devices for end mills and the like are conventionally known.

For example, the applicant has devised a tool holder device shown in FIGS. 1 to 3 and has filed an earlier application.

Its schematic configuration will be explained.

A chuck body 5 for holding a tool is provided in a holder part 1' protruding from the tip of the holder body 1, and the chuck body 5 can be expanded and contracted by pushing and pulling action. A push/pull shaft member 10 is provided in the holding hole 8 provided so as to be movable in the axial direction, and the tip of the push/pull shaft member 10 is placed inside the holding hole 8 similarly provided in the holder portion 1' of the chuck body 5. Screwingly connected to the rear end part, an engagement hole 12 having a shape to support a plate is formed in the middle part of the push/pull shaft 10, and a plate-shaped engagement body 11 is inserted into the engagement hole 12, Both ends of the engaging body 11 are axially movably engaged with guide length windows 13 bored in the axial direction of the holder part 1', and the rotating body 14 that holds both protruding ends of the engaging body 11 is connected to the holder part 1'. 1' so as to be movable in the axial direction.

In such a tool holder device, when the rotating body 14 is rotated, the rotating body 14 rotates and moves in the axial direction due to the action of the threaded portion 15, and this axial movement causes the rotating body 14 to be loosely engaged and held. The engaging body 11 moves in the axial direction in a non-rotating state, and the push/pull shaft member 10
In this case, when the push-pull shaft member 10 moves forward, the chuck body 5 screwed to the push-pull shaft member 10 also moves forward, and the chuck body 5 expands due to its own elasticity, and the push-pull shaft moves forward. When the material 10 retreats, the chuck body 5 also retreats, and the chuck body 5 undergoes a contraction movement due to the contact between the tapered inner surface 9 and the tapered outer surface 7, and can hold the tool 16 therebetween.

[The problem that the idea attempts to solve]

However, in this earlier application, the plate-shaped engaging body 1
It has been confirmed that since the side surface of the rotating body 14 is engaged with the engagement step 14' of the rotary body 14, a disadvantage arises in that it receives a large surface pressure.

The applicant proposes a tool holder device that solves these drawbacks.

[Means to solve the problem]

The gist of the present invention is to provide a chuck body 5 for holding a tool in a holder portion 1' protruding from the tip of a holder body 1.
A push-pull shaft member 10 is provided in a holding hole 8 provided in the holder portion 1' so as to be movable in the axial direction, and the chuck body 5 can be expanded and contracted by pushing and pulling action. The tip of the pull shaft member 10 is screwed and connected to the rear end of the chuck body 5 which is placed inside the holding hole 8 similarly provided in the holder part 1'.
The collar member 17 is fitted onto the collar member 17.
A through hole 18 for supporting the pin-shaped engaging body 11 is formed in the push-pull shaft member 10, and an engaging hole 12 for supporting the pin-shaped engaging body 11 is formed in the middle of the push-pull shaft member 10. 12 and a through hole 18 bored in the collar member 17
The engaging body 11 is inserted through the holder portion 1', and both ends of the engaging body 11 are fitted into and engaged with the guide length windows 13 formed in the axial direction of the holder portion 1' so as to be movable in the axial direction. The present invention relates to a tool holder device characterized in that a rotating body 14 having a locking stepped surface 14' for holding a rotary member 14 is screwed onto a holder portion 1' so as to be movable in the axial direction.

[Effect]

When the rotating body 14 is rotated, the rotating body 14 rotates and moves in the axial direction due to the action of the threaded portion 15, and this axial movement causes the collar member 17 to engage with the locking stepped surface 14' of the rotating body 14. moves in the axial direction together with the engaging body 11 in a non-rotating state, and the push-pull shaft member 10 also moves in the axial direction. In this case, when the push-pull shaft member 10 moves forward, the chuck body 5 also moves forward together, and the chuck body 5 expands due to self-elasticity, and when the push/pull shaft member 10 retreats, the chuck body 5 also retreats, and the chuck body 5 contracts due to the abutting action between the tapered inner surface 9 and the tapered outer surface 7, so that the tool 16 can be clamped and held. .

〔Example〕

4 to 6 show examples of the present invention.

The engaging body 11 is formed into a pin shape, and the rotating body 14
The collar member 17 is loosely attached to the rotating body 14 between the structural members 14a and 14b, and the freely rotatable collar member 17 is fitted into the holder portion 1', and a through hole 18 is formed in the collar member 17. , a guide in which the engaging hole 12 of the push/pull shaft member 10 is a circular hole that exactly supports the pin-shaped engaging body 11, and the pin-shaped engaging body 11 is formed into a through hole 18 and a substantially rectangular hole when viewed from the top. It penetrates into the engagement hole 12 through the long window 13, and the engagement body 11
The holder part 1' can be moved in the axial direction while being prevented from rotating.
It is designed to hold the

Reference numeral 1 denotes a holder body, and the base of the holder body 1 is fitted onto a spindle 2 of a machine tool, and a pull stud 4 that is pulled by a claw member 3 is provided at the base end of the holder body 1.

Reference numeral 5 denotes a chuck body, the chuck body 5 has several grooves 6, the outer circumferential surface of the distal end of the chuck body 5 is formed into a tapered outer surface 7 that widens at the tip, and the chuck body 5 It is movably fitted into the holding hole 8 of the holder part 1' protruding from the tip, and the chuck body 5 can be expanded and contracted by the contact between the tapered inner surface 9 of the tip of the holding hole 8 and the tapered outer surface 7. This is what I did.

Reference numeral 10 denotes a push-pull shaft member. The push-pull shaft member 10 is formed into a shaft shape, and is provided in an extension of the holding hole 8 of the holder portion 1' so as to be movable in the axial direction, and its tip end is connected to the chuck body. 5 is screwed and connected.

Reference numeral 13 denotes a guide long window, which is a substantially rectangular hole when viewed from above, and is formed in the holder portion 1', and is inserted into the holder portion 1' so that the engaging body 11 can be moved in the axial direction while being prevented from rotating. shaped to hold.

Reference numeral 14 denotes a rotating body, and in this case, the rotating body 14 is integrally formed by screwing two members together.
A collar member 17 is provided between the structural members 14a and 14b.
is provided so as to be locked and held by the locking step surface 14',
The rotating body 14 is connected to the threaded portion 15 on the outer peripheral surface of the holder portion 1'.
It is screwed on.

[Effect of idea]

In the present invention, when the above-mentioned rotating body is rotated, the rotating body rotates and moves in the axial direction, and this axial movement causes the engaging body to be held in a non-rotating state through a collar member that is engaged with the locking cross section of the rotating body. The tool is moved in the axial direction, and the push/pull shaft material is also moved in the axial direction, and the chuck body screwed to the push/pull shaft material is also pushed and pulled together, so the tool can be clamped and held. Therefore, a chuck operating mechanism with a simple structure and high durability can be obtained, and the tool holder device is easy to manufacture, easy to assemble and disassemble, and can reduce costs.

Moreover, the pin-shaped engaging body is fitted into the through hole of the collar member fitted into the holder part, and the locking of the rotating body to the locking step surface is performed on the entire circumferential surface of both end faces of the collar member. Compared to the embodiments of FIGS. 1 to 3 devised by humans, the contact area between the engaging body 11 and the rotating body 14 is larger, and the surface pressure is correspondingly smaller. This is a highly practical tool holder device that can be used without causing distortion.

As described above, the intended purpose can be fully achieved.

[Brief explanation of drawings]

FIG. 1 is an overall side view of the embodiment according to the applicant's earlier application, FIG. 2 is a cross-sectional view of the same, FIG. 3 is a partial perspective view of the same, and FIG. 4 is an overall side view of the embodiment of the present invention. FIG. 5 is a cross-sectional view of the same, and FIG. 6 is a partial perspective view of the same. 1...Holder body, 1'...Holder part, 2...,
5...chuck body, 8...holding hole, 10...push/pull shaft member, 11...engaging body, 12...engaging hole, 13...
... Guide length window, 14 ... Rotating body, 14' ... Locking step surface, 17 ... Collar member, 18 ... Through hole.

Claims (1)

[Scope of utility model registration request] A chuck body for holding a tool is provided in a holder portion protruding from the tip of the holder body, and the chuck body can be expanded and contracted by pushing and pulling action,
A rear end portion of the chuck body in which a push-pull shaft member is provided in a holding hole provided in the holder portion so as to be movable in the axial direction, and the tip of this push-pull shaft material is placed within the holding hole also provided in the holder portion. A collar member is fitted onto the holder portion, a through hole for supporting a pin-shaped engaging body is bored in the collar member, and a pin-shaped engaging body is mounted in the middle part of the push/pull shaft member. A supporting engagement hole is formed through the collar member, an engagement body is inserted through the engagement hole and a through hole bored in the collar member, and both ends of the engagement body are inserted into guide length windows bored in the axial direction of the holder part. A tool holder characterized in that a rotary body is screwed onto a holder part so as to be movable in an axial direction, and has a locking stepped surface that is fitted and engaged so as to be movable in an axial direction and that holds both protruding ends of the engaging body. Device.