TWI643697B - Tool fixing structure with balancing nut and easy removal of the tool holder collet - Google Patents

Abstract

The invention relates to a tool fixing structure with a dynamic balance nut and easy to take out the tool holder collet, which comprises a cutter bar, a collet, a cutter and a nut, and the front end of the cutter bar is formed with an external thread, the cylinder The clip is fixed in the arbor, the outer ring circumferential surface of the collet is concavely provided with an abutting ring groove, and a front end surface of the collet is recessed with a through hole, and the cutter penetrates and is fixed to the through hole of the collet, The nut is locked to the external thread of the arbor, and a driving ring portion is partially protruded from the inner circumferential surface of the nut, and the driving ring portion partially extends into the abutting ring groove of the collet, and the nut The inner circumferential surface of the inner ring is partially concavely disposed with a balance groove, and the balance groove is disposed adjacent to the driving ring portion, and the inner circumferential surface of the nut protrudes from the inner circumferential surface of the nut with an clamping portion and a clamping portion, and the clamping portion The clamping portion is spaced along the inner circumferential surface of the nut to prevent the collet from falling to the ground during the process of detaching the shank to damage or injure people.

Description

Tool fixing structure with balancing nut and easy removal of the tool holder collet

The invention relates to a tool nut device, in particular to a tool fixing structure with a dynamic balance nut and easy to take out the tool holder collet.

The existing tool fixing structure comprises a cutter bar, a collet, a cutter and a nut, the front end of the cutter bar is concavely provided with a mounting hole, and the front end of the cutter bar is formed with an external thread, and the collet is disposed on the cutter bar The inside of the mounting hole and the front end surface thereof are provided with a through hole, and the cutter is tightly inserted into the through hole of the collet, and the nut is screwed to the external thread of the shank. And the inner circumferential surface of the nut is partially inwardly convexly provided with a driving ring portion, and the driving ring portion is in contact with the outer circumferential surface of the collet, so that the nut is rotated away from the arbor, the nut The collet can also be detached from the arbor by the driving ring portion, thereby achieving the effect of facilitating disassembly.

However, when the existing tool fixing structure is in use, the tool will rotate rapidly, because the nut is provided with the driving ring portion, so that the dynamic torque of the tool is not balanced when rotating at a high speed, so that the tool will shake when rotating. The accuracy of the tool during machining is affected, so the existing tool fixing structure is necessary for improvement.

In order to solve the problem that the tool is driven by the ring part, the tool will sway when the tool rotates at a high speed, which causes inaccuracies and insufficiency during operation. The main purpose of the present invention is to provide a tool. The nut balance nut is easy to take out the tool fixing structure of the tool holder collet, and the balance groove is recessed in the inner circumference of the nut inner ring of the nut, so that the nut can be stably rotated without shaking, and further, the screw An inner side of the inner ring of the cap protrudes from the clamping portion and the clamping portion, and the clamping portion and the clamping portion are spaced along the inner circumferential surface of the nut to prevent the collet from being detached from the arbor The ground is dropped during the process to damage or injure people.

The present invention solves the prior art problem and provides a tool fixing structure for moving a balance nut and easy to take out the tool holder collet, comprising: a cutter bar having a front end and a rear end, the front end of the cutter bar being recessed a mounting hole is formed, and a front end of the arbor is formed with an external thread; a collet is fixed in the mounting hole of the arbor, and an outer ring circumferential surface of the collet is concavely provided with an abutting ring groove, a front end surface of the collet is concavely provided with a through hole; a cutter, the cutter penetrates and is fixed to the through hole of the collet; and a nut locked to the external thread of the cutter rod, and the inside of the nut A driving ring portion is partially protruded from the circumferential surface of the ring, and the driving ring portion partially extends into the abutting ring groove of the collet, and a peripheral groove of the inner ring of the nut is partially recessed with a balance groove, the balance groove and the balance groove The driving ring portion is disposed adjacent to each other, and the inner circumferential surface of the nut protrudes from the clamping portion and a clamping portion, and the clamping portion and the clamping portion are spaced along the inner circumferential surface of the nut Settings.

In the foregoing tool fixing structure, which has a balance nut and is easy to take out the tool holder collet, wherein the clamping portion and the clamping portion are disposed along the same radial line of the inner circumferential surface of the nut.

The utility model can improve the efficiency obtained by: the inner circumferential surface of the nut is partially recessed with the balance groove, and the dynamic moment of the balance groove and the dynamic moment of the driving ring are balanced with each other to balance the balance The groove can achieve the dynamic balance effect with the driving ring portion, and the nut can be stably rotated without shaking when the tool fixing structure with the balance nut and the tool holder is easy to take out, and further, The clamping portion and the clamping portion can support the collet against the clamping portion of the inner ring of the nut by the clamping portion and the clamping portion, wherein the nut is rotated and detached relative to the arbor To prevent the collet from falling to the ground during the process of detaching the arbor to damage or injure people.

In order to understand the technical features and practical effects of the present invention in detail, and in accordance with the present invention, further details are shown in the following preferred embodiments.

A preferred embodiment of the tool fixing structure for moving the balance nut and for easily removing the tool holder collet is shown in FIGS. 1 and 2, and includes a tool holder 10, a collet 20, and a cutter 30. And a nut 40, wherein:

The shank 10 is provided with a front end 101 and a rear end 102. The front end 101 of the shank 10 is recessed with a mounting hole 11, and the front end of the shank 10 is formed with an external thread 12, and the collet 20 is fixed to the arbor The outer circumferential surface of the collet 20 is annularly provided with an abutting ring groove 21, and a front end surface of the collet 20 is recessed with a through hole 22, and the cutter 30 is inserted into and fixed to the collet The perforation 22 of the cutter 30 includes a set end 31 and a sharp end 32. The set end 31 of the cutter 30 is a smooth rod. The set end 31 of the cutter 30 penetrates and is fixed to the collet 20 The perforation 22, the sharp end 32 of the cutter 30 is a sharpened body, and the sharp end 32 of the cutter 30 extends beyond the perforation 22 of the collet 20.

Referring to FIG. 3, the nut 40 is locked to the external thread 12 of the shank 10, and a peripheral ring surface of the nut 40 is partially convexly provided with a driving ring portion 41, and the driving ring portion 41 is partially extended. The collet 20 is abutted in the annular groove 21, and a peripheral groove 42 is partially recessed in the inner circumferential surface of the nut 40, and the balance groove 42 is disposed adjacent to the driving ring portion 41. When the whole is rotated, the balance groove 42 can achieve a dynamic balance with the driving ring portion 41. Further, as shown in FIG. 6 and FIG. 7, the inner circumferential surface of the nut 40 is convexly provided with an intervening portion 43. And a clamping portion 44, the clamping portion 43 and the clamping portion 44 are spaced apart along the inner circumferential surface of the nut 40. Preferably, the clamping portion 43 and the clamping portion 44 are It is disposed along the same radial line along the inner circumferential surface of the nut 40.

When the operation of the present invention is performed, that is, when the shank fixing structure with the balance nut and the shank clamp is easy to take out, the balance groove 42 is partially recessed by the inner circumferential surface of the nut 40. The dynamic moment of the balance groove 42 and the dynamic moment of the driving ring portion 41 are balanced with each other, so that the balance groove 42 can achieve a dynamic balance with the driving ring portion 41, and the balance nut can be easily removed. When the cutter fixing structure of the collet is rotated as a whole, the nut 40 can be stably rotated without shaking. Further, as shown in FIG. 6, the clamping portion 43 is protruded from the inner circumferential surface of the nut 40. The clamping portion 44 allows the clamping portion 43 and the clamping portion 44 to bear against the collet 20 during the rotation of the nut 40 relative to the arbor 10, thereby preventing the collet 20 from being disassembled. Falling from the ground during the process of the shank 10 damages or injures the person.

Compared with the unbalanced dynamic torque of the existing tool at the time of high-speed rotation, the operation accuracy of the tool is affected, and the tool holder fixing structure of the present invention having the balance nut and the easy removal of the tool holder collet is transmitted through the nut The balance groove 42 is recessed on the inner circumference of the inner ring 40 to achieve the effect of balancing the dynamic moments of the driving ring portion 41. Further, the clamping portion 43 and the clamping portion 44 are designed to avoid the collet 20 Drops the ground during the process of detaching the shank 10 to damage or injure the person.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any one of ordinary skill in the art can use the present invention without departing from the scope of the present invention. Equivalent embodiments of the invention may be made without departing from the technical scope of the present invention.

10‧‧‧Cutter

101‧‧‧ front end

102‧‧‧ Backend

11‧‧‧Installation holes

12‧‧‧ external thread

20‧‧‧ Collet

21‧‧‧Attend the ring groove

22‧‧‧Perforation

30‧‧‧Tools

31‧‧‧Setting end

32‧‧‧ sharp end

40‧‧‧ Nuts

41‧‧‧Drive the ring

42‧‧‧balanced groove

43‧‧‧Clamping Department

44‧‧‧Clamping Department

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 perspective view of the preferred embodiment of the present invention. Figure 3 is a cross-sectional side view of a preferred embodiment of the present invention. Figure 4 is a perspective view showing the appearance of a nut according to a preferred embodiment of the present invention. Figure 5 is a cross-sectional side view of a nut of a preferred embodiment of the present invention. Figure 6 is a cross-sectional front view of the A-A cut line in Figure 5. Figure 7 is a partially enlarged cross-sectional front view of Figure 6.

Claims (2)

A tool fixing structure with a balance nut and easy to take out the tool holder collet, comprising: a cutter bar having a front end and a rear end, the front end of the cutter bar being recessed with a mounting hole, and the cutter bar The front end is formed with an external thread; a collet is fixed in the mounting hole of the arbor; the outer ring circumferential surface of the collet is concavely provided with an abutting ring groove, and the front end surface of the collet is concavely disposed a perforation; a cutter penetrating and fixing the perforation of the collet; and a nut locked to the external thread of the cutter bar, and the inner circumferential surface of the nut is partially convexly provided a ring portion, the driving ring portion partially extends into the abutting ring groove of the collet, and a peripheral groove of the inner ring of the nut is partially recessed with a balance groove, and the balance groove is adjacent to the driving ring portion A clamping portion and a clamping portion are protruded from a circumferential surface of the inner ring of the nut, and the clamping portion and the clamping portion are spaced apart along a circumferential surface of the inner ring of the nut. The tool fixing structure according to claim 1, wherein the clamping portion and the clamping portion are disposed along a same diameter line along a circumferential surface of the inner ring of the nut.