JP3206867U - Easy-to-detach chuck member for cutting tools - Google Patents

Abstract

An easily detachable chuck member for clamping a cutter in a cutting tool is provided. An easily detachable chuck member 20 for a cutting tool is provided with an insertion portion 21 provided on one side of the chuck member, and on the other side of the chuck member, and an arcuate annular surface is formed on the outer peripheral surface. A locking convex edge 22, an annular recess 23 provided between the insertion portion and the locking convex edge, a through hole 24 formed over the entire center of the chuck member in the axial direction, and a chuck, respectively. The outer peripheral surface of the member has a plurality of notch grooves 25 that are communicated with the through hole along the radial direction and cut so as to extend to one end of both ends of the chuck member along the axial direction. The chuck member and the lid member 40 can be easily disassembled. [Selection] Figure 2

Description

  The present invention particularly relates to a chuck member for clamping a cutter in a cutting tool.

  As shown in FIGS. 5 and 6, the conventional cutter holder has a holder main body 60, a chuck 70, a drill 80, and a lid member 90. A tapered mounting hole 61 whose inner diameter decreases toward the end is formed, and an insertion portion 71 having a tapered shape is provided on one side of the chuck 70 so as to be fitted into the mounting hole 61. A locking convex edge 72 is provided on the other side, a first inclined surface 721 is formed at the outer end of the locking convex edge 72, and a second inclined surface 722 is formed in an annular shape inside the locking convex edge 72. An annular recess 73 is formed between the second inclined surface 722 and the insertion portion 71, one end of the drill 80 is inserted into the chuck 70, and the lid member 90 is annularly engaged at one end thereof. The joint 91 is provided and the inner periphery A chamfered portion 911 is formed, and the lid member 90 is screwed into one end of the holder body 60 on which the chuck 70 is mounted, and is fitted into the annular recess 73 of the chuck 70 by the engaging portion 91 so as to engage the locking convex edge 72. Therefore, the chuck 70 can be firmly fixed to the holder body 60 so that the chuck 70 does not fall off.

  In the conventional cutter holder, since the engaging portion 91 of the lid member 90 is latched by the latching convex edge 72 of the chuck 70, the lid member 90 and the chuck 70 are firmly connected when cutting is performed. Because it can be assembled to, it will not come off.

  However, in the conventional cutter holder, when the lid member and the chuck are removed, the chamfered portion of the engaging portion in the lid member is locked to the second inclined surface of the locking convex edge in the chuck. Since it is very difficult to remove and disassemble the lid member and the chuck, it is very inconvenient in use.

The easily detachable chuck member for the cutting tool of the present invention is
An insertion portion provided on one side of the chuck member;
A locking convex edge provided on the other side of the chuck member and having an arcuate annular surface formed on the outer peripheral surface;
An annular recess provided between the insertion portion and the locking convex edge;
A through hole formed over the entire center of the chuck member in the axial direction;
A plurality of notch grooves that are communicated with the through-hole along the radial direction on the outer peripheral surface of the chuck member and cut into one end of both ends of the chuck member along the axial direction; Have.

  Since the easily detachable chuck member for a cutting tool according to the present invention has the above-described structure, when the chuck member and the lid member are detached from the holder body and disassembled from each other, the outer periphery of the locking convex edge of the chuck member Due to the arc-shaped annular surface on the surface, the portion where the locking convex edge contacts the chamfered portion of the lid member has only an annular contact area. Therefore, the annular contact area is smaller than that of the conventional structure, and the frictional force between the locking convex edge and the chamfered portion of the lid member is reduced. Therefore, the chuck member and the lid member It is easy to disassemble and is convenient and easy to operate.

It is a perspective view which shows the state which mounted | wore the cutter holder with the easily detachable chuck member for cutting tools which concerns on this invention. It is a partial expansion disassembled perspective view which shows the state which assembles | attaches the chuck member for cutting tools which concerns on this invention with the other member of a cutter holder easily. It is a partial expanded side sectional view which shows the state which assembled the chuck member for cutting tools which concerns on this invention with the other member of a cutter holder easily. It is a perspective view of an easily attachable / detachable chuck member for a cutting tool according to the present invention. It is a disassembled perspective view of the conventional cutter holder. It is a partial expanded side surface sectional view of the conventional cutter holder.

  As shown in FIGS. 1 and 2, a cutter holder using an easily detachable chuck member for a cutting tool according to the present invention includes a holder body 10, a chuck member 20, a blade member 30, and a lid member 40. Among them, the chuck member 20 is mounted on the holder body 10, the blade member 30 is inserted into the chuck member 20, and the lid member 40 penetrates the blade member 30 and protrudes to the outside. Screwed onto the holder body 10.

  As shown in FIGS. 1 and 2, the holder body 10 has an outer thread 11 formed on an outer peripheral surface on one side, and the holder body 10 goes from one end to the other end with the outer thread 11 inside. As a result, a tapered fitting hole 12 is formed.

  As shown in FIGS. 2, 3, and 4, the chuck member 20 includes an insertion portion 21, a locking convex edge 22, an annular concave portion 23, a through hole 24, and a plurality of notch grooves 25. Among them, the insertion portion 21 is provided on one side of the chuck member 20 and has a tapered shape so that it can be fitted into the fitting hole 12. The locking convex edge 22 is inserted on the other side of the chuck member 20, an arc-shaped annular surface is formed on the outer peripheral surface thereof, and the annular recess 23 is formed between the insertion portion 21 and the locking convex edge. 22 and a side surface 231 formed on the end surface of the distal end of the insertion portion 21 so as to be perpendicular to the outer peripheral surface of the annular recess 23, and the through hole 24 extends in the axial direction of the chuck member 20. Each of the plurality of notch grooves 25 is formed at the center of the chuck portion. So as to communicate with the through hole 24 in the radial direction on the outer peripheral surface of 20 are cut along said axial direction of the chuck member 20 to extend to one end of both ends of the chuck members 20.

  As shown in FIGS. 1 to 3, the blade member 30 is provided with a cutting part 31 that is a spiral drill on one side and a clamping part 32 on the other side. It is inserted into the through hole 24 of the member 20. The outer diameter of the clamping part 32 is set to correspond to the inner diameter of the through hole 24 of the chuck member 20.

  As shown in FIGS. 2 and 3, the lid member 40 is combined with the holder main body 10 and has a cover shape, and includes a locking portion 41, a peripheral wall portion 42, and an internal thread 43. The portion 41 is provided in an annular shape on one side of the lid member 40, and a chamfered portion 411 is formed in an annular shape on the other side of the locking portion 41 opposite to the holder main body 10. When combined with the main body 10, the locking portion 41 is fitted and locked in the annular recess 23 of the chuck member 20, and the peripheral wall portion 42 extends annularly from the periphery of the locking portion 41 to the other side. The inner thread 43 is formed on the inner peripheral surface near the other side of the peripheral wall portion 42, and the inner thread 43 of the lid member 40 is screwed to the outer thread 11 of the holder body 10. The lid member 40 is combined with the holder body 10 to When the locking portion 41 of the lid member 40 abuts against the side surface 231 of the annular recess 23 of the chuck member 20.

  When the chuck member 20 and the lid member 40 are detached from the holder body 10 and disassembled, the chuck member 20 and the lid member 40 are pulled in opposite directions, and the locking convex edge 22 of the chuck member 20 is pulled. When brought into contact with the chamfered portion 411 of the locking portion 41 of the lid member 40, the locking convex edge 22 and the lid member 40 are formed by an arcuate annular surface on the outer peripheral surface of the locking convex edge 22 of the chuck member 20. The portion in contact with the chamfered portion 411 has only an annular contact area. Therefore, the annular contact area is smaller than that of the conventional structure, and the frictional force between the locking convex edge 22 and the chamfered portion 411 of the lid member 40 is reduced. The lid member 40 can be easily disassembled, which is convenient and simple in operation.

DESCRIPTION OF SYMBOLS 10 Holder main body 11 External thread 12 Insertion hole 20 Chuck member 21 Insertion part 22 Locking convex edge 23 Annular recessed part 231 Side surface 24 Through hole 25 Notch groove 30 Blade member 31 Cutting part 32 Holding part 40 Lid member 41 Locking Part 411 Chamfered part 42 Peripheral wall part 43 Inner thread 60 Holder body 61 Mounting hole 70 Chuck 71 Insertion part 72 Locking convex edge 721 First inclined surface 722 Second inclined surface 73 Annular recess 80 Drill 90 Lid member 91 Engaging part 911 Chamfer

Claims (1)

An easily detachable chuck member for a cutting tool,
An insertion portion provided on one side of the chuck member;
A locking convex edge provided on the other side of the chuck member and having an arcuate annular surface formed on the outer peripheral surface;
An annular recess provided between the insertion portion and the locking convex edge;
A through hole formed over the entire center of the chuck member in the axial direction;
A plurality of notch grooves that are communicated with the through-hole along the radial direction on the outer peripheral surface of the chuck member and cut into one end of both ends of the chuck member along the axial direction; An easily attachable / detachable chuck member for a cutting tool.

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