TWM531350U - Collet of easily taking knife bar out - Google Patents

Description

Easy to remove the holder of the knife bar

The present invention relates to a machine tool part, in particular to a collet which is easy to remove the arbor and which can be easily separated from the fixed cover and the collet.

As shown in FIG. 5 and FIG. 6, the existing arbor includes a shank body 60, a collet 70, a cutter 80 and a fixing cover 90. The shank main body 60 has opposite ends and is provided with an inner portion. a hole 61, the inner hole 61 is a conical hole extending from an end surface of one end of the shank body 60 toward the other end; the collet 70 has two ends and is provided with a joint portion 71 and a fixing portion a cover edge 72 and a ring groove 73, the joint portion 71 is located at one end of the collet 70 and corresponding to the inner hole 61, and is disposed in a conical shape. The joint portion 71 is inserted into the inner hole 61, and the fixed cover card edge The fixing cover rim 72 has a first inclined surface 721 and a second inclined surface 722 which are oppositely arranged in a ring shape. The annular groove 73 is disposed on the joint portion 71 and the fixing cover. Between the rims 72 and adjacent to the second slanting surface 722; the cutter 80 is disposed in the collet 70; the fixing cover 90 has opposite ends and an annular portion of the engaging portion 91 is provided at one end thereof. The portion 91 is provided with a chamfered slope 911, and the fixing cover 90 is locked to the shank body 60. The engaging portion 91 of the fixing cover 90 is engaged with the barrel Ring grooves 73 and 70 by the collet 70 of the fixed cover 72 limits the card edge.

The engaging portion 91 of the fixing cover 90 of the existing arbor is restricted by the fixed cover rim 72 of the collet 70, so that it can be ensured that the collet 70 and the fixing cover 90 are not separated from each other during processing; however, When disassembling, the chamfered slope 911 of the engaging portion 91 of the fixing cover 90 abuts against the second inclined surface 722 of the fixing cover card edge 72 of the collet 70, thereby causing the collet 70 and the fixing cover 90 when disassembled. The problem is not easy to get rid of between the two.

In order to solve the problem that the fixing cover edge of the collet of the conventional arbor and the engaging portion of the fixing cover are not easily separated from each other, it is difficult to disassemble. The present invention proposes a collet which is easy to take out the arbor, and the fixing cover has a circular arc shape, which can reduce the range of the clamping edge of the fixing clip of the collet and the engaging portion of the fixing cover, and can be easily disassembled. purpose.

This creation solves the technical problem of the easy to remove the shank of the arbor:

The collet has opposite ends and includes a joint portion, a fixed cover card edge, a ring groove and a plurality of split grooves. The joint portion is located at one end of the collet, and the fixed cover card edge ring is disposed on the collet The other end has a circular arc-shaped circumferential surface, and the annular groove is disposed between the joint portion and the fixed cover card edge, and the plurality of split grooves respectively penetrate the collet radially.

The improvement in the efficiency of the technical means of the present invention is that the clip of the arbor that is easy to take out of the creation has a circular peripheral edge of the fixed cover, so that when the collet and the cover are separated, Both the collet and the fixed cover have only one loop of contact, reduce the range in which the collet and the fixed cover abut, and achieve the purpose of easily separating the collet and the fixed cover.

10‧‧‧Cutter body

11‧‧‧ external thread

12‧‧‧ Inner hole

20‧‧‧ Collet

21‧‧‧Combination Department

22‧‧‧Fixed cover edge

23‧‧‧Circle

231‧‧‧ side

24‧‧‧Perforation

25‧‧‧"

30‧‧‧Tools

31‧‧‧cutting department

32‧‧‧ Collet joint

40‧‧‧Fixed cover

41‧‧‧Care Department

411‧‧‧Chamfered bevel

42‧‧‧Walls

43‧‧‧ internal thread

60‧‧‧Cutter body

61‧‧‧ inside hole

70‧‧‧ Collet

71‧‧‧Combination

72‧‧‧Fixed cover edge

721‧‧‧First bevel

722‧‧‧Second slope

73‧‧‧Circle

80‧‧‧Tools

90‧‧‧Fixed cover

91‧‧‧Care Department

911‧‧‧Chamfered bevel

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view showing the appearance of a preferred embodiment of the present invention.

Figure 2 is an exploded view of the preferred embodiment of the present invention.

Figure 3 is a partial cross-sectional view of a preferred embodiment of the present invention.

Figure 4 is a perspective view showing the appearance of the collet of the preferred embodiment of the present invention.

Figure 5 is an exploded view of the existing arbor.

Figure 6 is a cross-sectional view of a portion of a prior art shank.

In order to understand the technical features and practical functions of the present work in detail, and in accordance with the creative content, the following further describes the preferred embodiment as shown in the following figure:

As shown in FIG. 1 and FIG. 2, the arbor that is provided with the clip for easy removal of the arbor includes a shank body 10, a collet 20, a cutter 30 and a fixing cover 40; wherein the cylinder The clip 20 is mounted to the cutter body 10, and the cutter 30 is placed in the collet 20, and the fixed cover 40 is locked to the cutter body 10 and the cutter 30 protrudes from the fixed cover 40.

As shown in FIG. 1 and FIG. 2, the shank body 10 has opposite ends and includes an external thread 11 and an inner hole 12; wherein the external thread 11 is located at one end of the shank body 10 and is disposed at the same a circumferential surface of the shank body 10, the inner hole 12 and the external thread 11 are located at the same end of the shank body 10, the inner hole 12 is a conical hole and faces from an end surface of one end of the shank body 10 The other end of the shank body 10 extends.

As shown in FIG. 2, FIG. 3 and FIG. 4, the collet 20 has opposite ends and includes a joint portion 21, a fixed cover card edge 22, a ring groove 23, a through hole 24 and a plurality of slit grooves 25; The joint portion 21 is located at one end of the collet 20 and is disposed in a conical shape corresponding to the inner hole 12, and the joint portion 21 is inserted into the inner hole 12 of the cutter body 10; the fixed cover card edge 22 is ring-shaped The other end of the collet 20 has a circular arc-shaped circumferential surface; the annular groove 23 is recessed between the joint portion 21 and the fixed cover card edge 22, and the annular groove 23 has a bottom surface and the ring a side surface 231 of the bottom surface of the groove 23, the side surface 231 is located at a side of the annular groove 23 adjacent to the joint portion 21; the through hole 24 extends axially through the collet 20; the plurality of intersecting grooves 25 are respectively penetrated radially The collet 20.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the cutter 30 has opposite ends and is provided with a cutting portion 31 and a collet coupling portion 32 . The cutting portion 31 is located at one end of the cutter 30 and is a spiral blade, the collet joint 32 is located at the other end of the cutter 30, the collet joint 32 is inserted through the through hole 24 of the collet 20, and the outer diameter of the collet joint 32 is engaged with the collet The aperture of the perforation 24 of 20 is set.

As shown in FIG. 2 and FIG. 3 , the fixing cover 40 is coupled to the shank body 10 . The fixing cover 40 is in the shape of a cover and has a first end and a second end. The fixing cover 40 includes a first end and a second end. Clamping department 41. A wall 42 and an internal thread 43; wherein the engaging portion 41 is annular and located at the first end of the fixing cover 40. The engaging portion 41 has a chamfered slope 411, and the chamfered surface 411 is annularly disposed. And facing away from the second end of the fixing cover 40, the engaging portion 41 is engaged with the annular groove 23 of the collet 20 and is restricted by the fixed cover card edge 22 of the collet 20; the peripheral wall 42 is connected to the ring The outer edge of the engaging portion 41 has an inner peripheral surface; the inner thread 43 is disposed on the inner circumferential surface of the peripheral wall 42 , and the internal thread 43 of the fixing cover 40 is locked to the external thread 11 of the cutter body 10 , so that The engaging portion 41 of the fixing cover 40 abuts against the side surface 231 of the annular groove 23 of the collet 20 .

When the collet 20 and the fixing cover 40 are separated, the collet 20 and the fixing cover 40 are firstly held by both hands, and the collet 20 and the fixing cover 40 are pulled in opposite directions, when the cylinder is When the fixed cover card edge 22 of the clip 20 abuts against the chamfered slope 411 of the engaging portion 41 of the fixing cover 40, since the fixed cover card edge 22 of the collet 20 has a circular arc-shaped circumferential surface, when When the fixed cover card edge 22 is in contact with the chamfered slope 411, there is only one line of contact, so that the contact range of the two is reduced to be easily separated from each other; when the collet 20 and the fixed cover 40 are separated, the The fixed cover card edge 22 is slidable along the chamfered slope 411 so that it is less laborious to separate the two.

10‧‧‧Cutter body

11‧‧‧ external thread

12‧‧‧ Inner hole

20‧‧‧ Collet

21‧‧‧Combination Department

22‧‧‧Fixed cover edge

23‧‧‧Circle

231‧‧‧ side

24‧‧‧Perforation

30‧‧‧Tools

31‧‧‧cutting department

32‧‧‧ Collet joint

40‧‧‧Fixed cover

41‧‧‧Care Department

411‧‧‧Chamfered bevel

42‧‧‧Walls

43‧‧‧ internal thread

Claims (1)

A collet for easy removal of a shank, which is mounted on a processing shank: the collet has opposite ends and includes a joint portion, a fixed cover rim, a ring groove and a plurality of gullies, the joint portion The end of the collet is disposed at the other end of the collet and has a circular arc-shaped circumferential surface. The annular groove is disposed between the joint portion and the fixed cover card edge. A plurality of split grooves respectively extend through the collet radially and radially.