TW201325840A - Adaptor structure of rotary tool bit - Google Patents

Abstract

An adaptor structure of a rotary tool bit comprises a rotary tool bit and an adaptor block. The rotary tool bit can be a drill bit, a screwdriver bit, or a milling cutter, which has a tail end forming an externally-threaded section. The externally-threaded section comprises a right-hand thread. The adaptor block is a polygonal bar, which can be clamped in a chuck of rotation-driving devices such as an electric drill or a milling machine. The adaptor block has an end face provided with a threaded hole to screwedly engage with the externally-threaded section of the rotary tool bit. The adaptor block comprises three projections and three clamping faces. The three projections can be protruding into the clamping slots among three jaws of the chucks. The three clamping faces are respectively engaged by the locking surfaces of the three jaws. With such an arrangement, the rotary tool bit can be securely clamped by the rotation-driving device without slipping, thereby achieving the efficacy of easy operation and use convenience.

Description

Rotating tool head transfer structure

The present invention relates to the technical field of an adapter structure such as a drill bit, a screwdriver bit or a milling cutter, etc., and more particularly to a method for enabling a rotary tool head to be firmly held by a rotary drive without sliding And a transfer structure having a rotary tool head that is easy to operate and use.

Referring to the first and second figures, the conventional rotary tool head 10, such as a drill bit, a screwdriver bit, a milling cutter, etc., is shown, and the fixing portion 11 at the trailing end thereof has a cylindrical shape. The rotary driving device 12 for driving the rotary tool head 10, such as an electric drill, a milling machine, etc., has a collet 13 for holding the fixing portion 11 of the rotary tool head 10 to drive the rotary tool head 10 Rotate for drilling, screwing or milling...etc. The chuck 13 has a clamping portion 14 and a rotating portion 15 rotatably sleeved on the clamping portion 14. The clamping jaws 14 are provided with three clamping jaws 16 that are relatively slidably spaced apart on the inner circumference of the clamping portion 14. The clamping faces 160 on the opposite sides of the three clamping jaws 16 are U-shaped. At least one insertion hole 17 is provided on the outer circumferential surface of the clamping portion 14. The front end surface of the rotating portion 15 has a plurality of convex teeth arranged in an annular shape, and the rotating portion 15 can drive the three clamping jaws 16 to be clamped or opened by positive and reverse rotation.

When in use, the fixing portion 11 of the rotary tool head 10 is first inserted between the three clamping jaws 16, and the fixing wrench 18 is combined with the insertion hole 17 to make the card of the circumferential surface thereof. The teeth are engaged between the convex teeth of the rotating portion 15. Then, the fixing wrench 18 is rotated to drive the rotating portion 15 to rotate forward, thereby driving the three clamping jaws 16 to clamp the fixing portion 11 of the rotary tool head 10. Thus, the rotary drive unit 12 can drive the rotary tool head 10 to rotate for processing.

However, since the three jaws 16 grip the round cylindrical fixing portion 11 of the rotary tool head 10 by the U-shaped clamping surface 160, the clamping force is very limited, and the clamping is not easy. The cylindrical fixing portion 11 is housed. The general rotary tool head 10 is usually used for processing materials such as plastic, wood, cement or metal. When drilling, screwing or milling a hard material such as cement or metal, The reaction force of the cutting or screw lock is very large. Therefore, it is often the case that the clamping force of the three jaws 16 is insufficient, and the cylindrical fixing portion 11 of the rotary tool head 10 is apt to slide between the three clamping jaws 16, thereby causing the chuck 13 to idle. Seriously affect processing efficiency and safety.

In view of the above, the inventors have intensively conceived the above-mentioned problems, and actively researched and improved the trial and development to design the present invention.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a transfer structure for a rotary tool head that can be held by a rotary drive unit without being slid and operated.

The adapter structure of the rotary tool head of the present invention is mainly used for clamping the chuck of a rotary driving device (such as an electric drill or a milling machine, etc.) so that it is driven to rotate and does not slip. By. The clamping head is provided with three clamping jaws which are relatively clamped or opened at equal intervals, and the opposite sides of the three clamping jaws respectively have a U-shaped clamping surface, and respectively separate the two adjacent clamping jaws. Form a card slot. The utility model is characterized in that the transfer structure of the rotary tool head comprises a rotary tool head and a transfer block. Wherein, the rotary tool head can be a drill bit, a screwdriver bit or a milling cutter, etc., and the tail end has an externally threaded section, and the externally threaded section is a right-handed thread. The adapter block is a polygonal cylinder comprising three protrusions and three clamping faces. The three protrusions are respectively protruded into the slots between the three jaws, and the three clamping faces are respectively clamped by the clamping faces of the three jaws. One end of the adapter block has a screw hole for screwing the threaded portion of the rotary tool head.

In this way, by the three convex portions of the adapter block protruding into the three card slots and the three clamping surfaces for the three jaws to be clamped, the three jaws can be Can be firmly clamped on the three clamping surfaces, and can easily apply rotational force to the three clamping surfaces for rotating the adapter block, so that the adapter block does not belong to the three clamps Sliding between the claws, thereby avoiding the idling of the collet. In particular, the externally threaded threaded portion of the rotary tool head is screwed into the threaded hole of the adapter block, and the rotary head can be rotated by the adapter block to rotate the rotary tool head. When the rotating tool head is prevented from coming off the adapter block. In addition, the rotating tool head and the adapter block can be easily disassembled by the screwing structure of the external thread segment and the screw hole. Moreover, as long as the external thread segments of the rotary tool heads of several specifications are set to the same outer diameter, the rotary tool heads of all common specifications are divided into a few groups according to the outer diameter dimensions of the outer thread segments thereof, so that A plurality of adapter blocks having corresponding screw holes are relatively matched. In this way, the rotary tool head of all common specifications can be used only by carrying the adapter block of a few specifications, so that the space can be saved and the portability is convenient and convenient.

The adapter structure of the rotary tool head according to the present invention is mainly used for a rotary drive device 20 to be firmly clamped so that it does not generate a slip when it is driven to rotate. The rotary tool head 30 can be a drill bit, a screwdriver head (cross or a word, etc.), a milling cutter, etc., and the rotary drive device 20 can be an electric drill, a milling machine, or the like. In order to facilitate the description of the object of the present invention and the means and effects thereof, the rotary tool head 30 and the rotary drive device 20 of the following embodiments are respectively described by using a drill bit and an electric drill.

Referring to FIGS. 8-8, the transfer structure of the rotary tool head includes a rotary tool head 30 and a transition block 40 coupled to the end of the rotary tool head 30. The transfer block 40 is It can be clamped by the rotary drive unit 20. among them:

The rotary drive unit 20 has a collet 21 having a clamping portion 22 and a rotating portion 23 rotatably fitted over the clamping portion 22. The clamping jaws 22 are provided with three jaws 24 that are relatively slidable or open at equal intervals in the inner circumference of the clamping portion 22. The clamping faces 25 on the opposite sides of the three jaws 24 are U-shaped, and a card slot 26 is formed between each of the two adjacent jaws 24, respectively. The outer peripheral surface of the clamping portion 22 is provided with at least one insertion hole 27 for insertion of a fixing wrench 28. The front end surface of the rotating portion 23 has a plurality of annularly arranged convex teeth for engaging with the engaging teeth of the fixed wrench 28, and the rotating portion 23 can drive the three clamping jaws 24 to be clamped or stretched by forward and reverse rotation. open. In this way, the latches of the fixed wrench 28 can be engaged between the protruding teeth of the rotating portion 23 to rotate the rotating portion 23, thereby driving the three clamping jaws 24 to be relatively clamped or opened. In order to achieve the purpose of clamping or releasing the adapter block 40.

The end of the rotary tool head 30 has an externally threaded section 31 which is a right-handed thread.

The adapter block 40 is a cylinder having a triangular cross section and has three convex portions 41 and three clamping surfaces 42. The three convex portions 41 are respectively protruded into the latching grooves 26 between the three clamping jaws 24, and the three clamping surfaces 42 are respectively clamped by the clamping faces 25 of the three clamping jaws 24. The front end of the adapter block 40 has a screw hole 43 for the external thread segment 31 of the rotary tool head 30 to be screwed. The three corners of the transition block 40 respectively form a circular arc surface. In the present invention, the adapter block 40 can also be other polygonal cylinders, which will not be further described.

Referring to FIG. 9 , it is another embodiment of the present invention, and the structure thereof is substantially the same as that of the above embodiment. The difference is that the three clamping faces 42 of the adapter block 40 of the embodiment are concave curved surfaces. shape.

In the fourth figure, it is pointed out that the rotating tool head 30 and the adapter block 40 can be easily disassembled by the screwing structure of the external thread segment 31 and the screw hole 43. Moreover, as long as the external thread segments 31 of the rotary tool heads 30 of several specifications are set to the same outer diameter, the rotary tool heads 30 of all common specifications are further divided into a few groups according to the outer diameter dimensions of the outer thread segments 31, In order to make it possible to fit a plurality of adapter blocks 40 having corresponding screw holes 43. For example, it can be set to three groups of L, M, and S, wherein the rotary tool head 30 of the L group has a specification of 9 to 13 mm, and the outer diameter of the outer thread segment 31 is M11; the specifications of the rotary tool head 30 of the M group The outer diameter of the outer thread segment 31 is M7; the outer diameter of the rotary tool head 30 of the S group is 2-6 mm, and the outer diameter of the outer thread segment 31 is M4. Therefore, it is only necessary to carry the screw block 43 correspondingly to the L, M, and S of the M11, M7, and M4, and the rotary tool head 30 of all the common specifications can be used, so that the space can be greatly saved. And cost, but also convenient to carry and have better convenience. Of course, the above-mentioned various specifications of the adapter block 40 can also be set to different outer diameters as needed, which will not be further described.

Since the adapter block 40 of the present invention is clamped by the three jaws 24, the three projections 41 project into the slot 26 between the three jaws 24, and the three clamps The holding surface 42 is held by the clamping faces 25 of the three jaws 24. In this way, the three clamping jaws 24 can firmly hold the adapter block 40, and the three clamping jaws 24 can easily apply rotational force to the three clamping faces 42 for the adapter block. 40 rotates, so that the adapter block 40 does not slide between the three jaws 24 due to the three convex portions 41, thereby preventing the chuck 21 from being idling. In particular, the externally threaded portion 31 of the right-handed thread of the rotary tool head 30 is screwed into the screw hole 43 of the adapter block 40, and the rotation of the chuck 21 through the adapter block 40 is further driven. When the tool head 30 is rotated in the forward direction, the rotary tool head 30 is prevented from being disengaged from the adapter block 40.

In summary, since the present invention has the above advantages and practical value, and has not seen the same or similar technology published or disclosed before, the present invention has met the novelty and progressive requirements of the invention patent, and applied according to law. .

[Prior technology]

10. . . Rotating tool head

11. . . Fixed part

12. . . Rotary drive

13. . . Chuck

14. . . Grip

15. . . Rotating part

16. . . Jaws

160. . . Clamping surface

17. . . Insert hole

18. . . Fixed wrench

[this invention]

20. . . Rotary drive

twenty one. . . Chuck

twenty two. . . Grip

twenty three. . . Rotating part

twenty four. . . Jaws

25. . . Clamping surface

26. . . Card slot

27. . . Insert hole

28. . . Fixed wrench

30. . . Rotating tool head

31. . . External thread segment

40. . . Transfer block

41. . . Convex

42. . . Clamping surface

43. . . Screw hole

The first figure is a schematic diagram of the state of use of the conventional drill bit.

The second figure is an enlarged cross-sectional view of the collet of the first figure.

The third figure is a perspective exploded view of the present invention.

The fourth figure is a perspective exploded view of the present invention.

The fifth figure is an enlarged schematic view of a three-dimensional combination of the present invention.

Figure 6 is an enlarged cross-sectional view showing the present invention.

The seventh figure is an enlarged schematic view of the cross-sectional combination of the present invention.

The eighth figure is an enlarged schematic cross-sectional view of the present invention clamped in the collet.

The ninth diagram is another embodiment of the present invention.

30. . . Rotating tool head

31. . . External thread segment

40. . . Transfer block

41. . . Convex

42. . . Clamping surface

43. . . Screw hole

Claims (6)

The adapter structure of the rotary tool head is mainly used for holding the chuck of a rotary driving device firmly, so that it is driven to rotate and does not generate a sliding when the machining is performed. Providing three clamping jaws that can be relatively clamped or opened, the opposite sides of the three clamping jaws respectively have a U-shaped clamping surface, and a card slot is formed between each two adjacent clamping jaws; The adapter structure of the rotary tool head comprises: a rotary tool head having a male threaded end at the tail end, the externally threaded section being a right-handed thread; and a transition piece being a polygonal cylinder comprising three a convex portion and three clamping surfaces, the three convex portions are respectively protruded into the slots between the three clamping jaws, and the three clamping surfaces respectively can be used for clamping the three clamping jaws The surface of the adapter block has a screw hole at one end of the adapter block for screwing the threaded portion of the rotary tool head. The adapter structure of the rotary tool head according to claim 1, wherein the three corners of the adapter block respectively form a circular arc surface. The transfer structure of the rotary tool head according to claim 2, wherein the three clamping surfaces are concave arcuate. The transfer structure of the rotary tool head according to any one of claims 1 to 3, wherein the rotary tool head is a drill bit. The transfer structure of the rotary tool head according to any one of claims 1 to 3, wherein the rotary tool head is a cross or a word driver. The transfer structure of the rotary tool head according to any one of claims 1 to 3, wherein the rotary tool head is a milling cutter.