TWM485778U - Drilling and screw-locking extension bar provided with flexible collet function for electric hammer and electric drill - Google Patents

Description

Borehole with elastic collet function for electric hammer and electric drill

This creation is a drill with a flexible collet function for electric hammers and electric drills. It is also suitable for woodworking, ironwork or construction cement drill bits.

In general, in order to improve work efficiency and save energy, ironsmiths or carpenters will use tools such as electric drills to drill or lock screws. When the ironsmith master makes the machining parts, it usually performs two steps of drilling and locking screws continuously. That is to say, it is usually necessary to drill holes in the machining parts before locking the screws. Based on labor-saving considerations, some constructors use a power tool equipped with a drill to drill holes, remove the drill bit and replace it with a screw lock to lock the screw into the hole, and then switch back to the drill. Drill bits for holes; even, in order to increase work efficiency, some builders often carry two electric machine tools during operation, first drilled with a power tool equipped with a drill bit, and then replace the power tool with screw locks. The machine locks the screw into the hole. The above construction methods have an additional burden on the builder in terms of efficiency, cost and physical strength.

At present, some combination tools with drilling and locking screws are also found in the workshop, but the drills of such tools are limited by type and handle type. Therefore, compared with traditional drills, such tools The cost of the drill bit is often much higher, which will increase the cost burden of the constructor and make it less suitable for full use.

Therefore, the creator devoted himself to research and cooperated with the application of the theory to propose a kind of The ingenious design can effectively improve the above-mentioned missing hammer and electric drill with the function of the elastic collet and the locking screw post.

The main purpose of this creation is to provide a special design with elastic joints, elastic collets, kits, first sleeves and second sleeves. The same electric drill can be used with traditional drill bits and screw locks. Drilling and locking screws work to improve work efficiency and reduce costs.

The second purpose of this creation is that the elastic collet is specially designed by a plurality of elastic clips, and can be applied to drills of various diameters to achieve simple operation and low cost.

A further object of the present invention is that the first sleeve system comprises a clutch zone, an outer ring sleeve and two springs specially designed to achieve the effect of fixing and disengaging the two-way clutch device.

The technical means adopted for the above purpose is a drilled and locked screw post with an elastic collet function for an electric hammer and an electric drill, comprising: a hollow elastic post, each of which has a first end a first connecting portion and a first clamping portion, and a first threaded portion and a polygonal portion are continuously disposed outside the first socket portion; a hollow elastic collet having one end connected to the first socket portion And the other end is provided with a second clamping portion, the second clamping portion is composed of a plurality of clips equidistantly arranged in a ring shape, each of the clips has a cutting groove therebetween; a hollow sleeve is sleeved on the sleeve Outside the elastic collet, the second threaded portion and the first threaded portion are respectively coupled to each other; a hollow first sleeve has one end fitted to the first sleeve portion and the polygonal portion Correspondingly coupled to each other, the other end of the first sleeve is provided with a second sleeve portion; a drill bit is inserted into the second clamping portion of the elastic collet, and the elastic collet is clamped to the sleeve And a hollow second set a tube, which is detachably coupled to the first sleeve, and a second sleeve portion and a fourth socket portion are respectively disposed at two ends of the second sleeve, the third sleeve portion and the second sleeve The joints are coupled to each other, and the fourth sleeve portion is detachably coupled to a screw lock member.

In an embodiment of the present invention, the first socket has a tapered hole therein, and one end of the elastic collet has an outer taper and is coupled to the tapered hole.

In an embodiment of the present invention, the kit has an inner taper therein, and the other end of the elastic collet has an outer taper and is coupled to the sleeve.

In an embodiment of the present creation, the first clamping portion is circular or polygonal.

In an embodiment of the present invention, the outer wall surface of the elastic collet is provided with a first joint portion, and the inner wall surface of the sleeve is provided with a second joint portion, and the first joint portion and the second joint portion are movably coupled to each other. .

In an embodiment of the present invention, the first sleeve includes a clutch area, an outer ring sleeve, two springs, a first through hole, and a first ball, and the first thread portion of the first socket portion and a first circular arc groove is disposed between the polygonal portions, the first through hole is disposed at a center of the clutch portion and corresponds to the first circular arc groove, and the outer ring sleeve and the two spring systems are sleeved on the a clutch area, and the outer ring sleeve resists between the two springs and presses the first ball, so that the first ball is located in the first through hole and protrudes from an inner wall surface of the first sleeve and resists The first circular groove.

In an embodiment of the present invention, a third circular arc groove is disposed at each end of the inner wall surface of the outer ring sleeve.

In an embodiment of the present invention, the two ends of the clutch area are respectively provided with a first stop portion and a second stop portion, and the two springs are located at the first stop portion and the second stop portion. between.

In an embodiment of the present invention, the first stop portion is a flange, and the second stop The blocking portion is composed of a card groove and a circlip, and the circlip is engaged in the card groove.

In an embodiment of the present invention, the third sleeve portion is sleeved on the outer wall surface of the second socket portion, and the second sleeve comprises a second ball body, a second hole, and a second button. a second annular groove, the second through hole is disposed in the second annular groove, and the outer wall surface of the second sleeve portion has a second circular groove, the second buckle sleeve The second ball is disposed in the second annular groove, and the second ball is located in the second through hole and protrudes from the inner wall surface of the third socket and resists the second circular groove.

In an embodiment of the present invention, the fourth sleeve portion is sleeved on the outer wall surface of the screw lock member, and the second sleeve includes a third sphere, a third perforation, and a third buckle. a third annular groove is disposed in the third annular groove, and the outer wall surface of the screw lock has a fourth circular groove, and the third buckle is sleeved on the first The third annular groove is pressed to press the third ball, and the third ball is located in the third through hole and protrudes from the inner wall surface of the fourth socket portion and resists the fourth circular groove.

The clamping principle of the elastic collet is that when the elastic collet which is divided into several equal parts is pressed into the conical hole of the same taper, the outer taper surface of the elastic collet will contract inward in the same ratio, so that the elasticity can be made The inner hole of the collet will also shrink in the same way as the face. When the drill bit is placed in the inner hole of the elastic collet, and the elastic collet is placed in the inner taper hole and the elastic collet is compressed inward by the nut, the inner hole of the elastic collet will be contracted inwardly at the same ratio to the surface. The diameter of the shank is determined by the diameter of the shank of the drill. This application applies this principle to the elastic post, so that the various drills with a diameter difference within a certain range can share the commonality of a flexible post, and the elastic collet is made of high elastic alloy steel and has high compressibility. And resilience. When the inner compression force of the nut is relaxed, the clip of the elastic collet can rebound to the original position, and each can also be solved. The drill of the same specification produced by the manufacturer has different handle diameter problems. In addition, the creation combines the rotation energy of the electric tool machine to drive the second sleeve with the first casing of the outer hexagon to achieve the elastic clamping function of the creation. And the function of drilling and locking screws.

When the outer ring on the first sleeve is not subjected to external force, the spring of the outer ring sleeve can be centered because the springs of the same coefficient are used at both ends, so that the plane between the third arc grooves in the outer ring sleeve is at the The position of the ball can force the first ball to fall into the first circular groove between the first threaded portion and the polygonal portion outside the elastic joint, so that the first sleeve can be fixed on the elastic pole. Function, when pushing the outer ring sleeve to the left, the third arc groove on the right side of the outer ring sleeve can be placed in the first ball position, and the space of the third arc groove can allow the first ball to float upward and escape from the elastic state. The first circular groove outside the post, so that the first sleeve can be taken out to the left. When the outer ring sleeve is pulled to the right, the third arc groove on the left side of the outer ring sleeve can be placed at the first ball position, and the space of the third arc groove can allow the first ball to float upward, so that the first The inside of the sleeve can be inserted into the outer part of the elastic post. When the tension of the outer ring sleeve is released, the outer ring sleeve will rebound to the centering position, so that the plane between the third circular arc grooves in the outer ring sleeve is in the first sphere. Position to secure the first sleeve to the resilient post.

In order to more clearly describe the drill hole and the lock screw post with the elastic collet function for the electric hammer and the electric drill proposed in the present invention, the following embodiments and accompanying drawings will be further described.

10‧‧‧Flexible Posts

11‧‧‧First set of joints

111‧‧‧Conical hole

112‧‧‧First threaded part

113‧‧‧Polygonal Department

114‧‧‧First circular groove

12‧‧‧First clamping section

20‧‧‧Flexible collet

21‧‧‧Second gripping section

211‧‧‧ Clips

212‧‧‧ cutting trench

22‧‧‧First joint

30‧‧‧ kit

31‧‧‧Second thread

32‧‧‧Second joint

40‧‧‧First casing

41‧‧‧Second socket

411‧‧‧Second arc groove

42‧‧‧Clutch Zone

421‧‧‧First stop

422‧‧‧second stop

4221‧‧‧ card ditch

4222‧‧‧ circlip

43‧‧‧Outer ring set

431‧‧‧The third circular groove

44‧‧‧ Spring

45‧‧‧First perforation

46‧‧‧First sphere

50‧‧‧ drill bit

60‧‧‧second casing

61‧‧‧ Third socket

611‧‧‧Second sphere

612‧‧‧Second perforation

613‧‧‧second buckle

614‧‧‧second annular groove

62‧‧‧Fourth joint

621‧‧‧ third sphere

622‧‧‧ third perforation

623‧‧‧ third buckle

624‧‧‧3rd annular groove

70‧‧‧ Screw locks

71‧‧‧fourth arc groove

100‧‧‧Power tool machine

110‧‧‧ chuck

120‧‧‧ joints

Figure 1 is a perspective view of an embodiment of the present invention.

Figure 2 is a partial cross-sectional view showing an embodiment of the present invention.

Fig. 3 is an exploded view of the element of Fig. 1.

Fig. 4 is an exploded view of the element of Fig. 2.

Figure 5 is a perspective view of an embodiment of the present invention in which a drill bit is inserted into the elastic collet and the elastic collet is clamped to the kit and the elastic post, and one end of the first sleeve is fitted with the fifth figure and electrically A schematic diagram of the use of the machine tool after clamping the elastic post.

Figure 6 is a schematic view showing the use of a screw sleeve on the other end of the first sleeve of the fifth sleeve.

Fig. 7 is a schematic view showing the matching of the screw lock member and the screw which can be inserted into the second sleeve according to an embodiment of the present invention.

Figure 8 is a schematic view showing the elastic post connecting the elastic collet and decomposing the kit according to an embodiment of the present invention.

Please refer to the figures 1~6, which is a drilling and locking screw post with an elastic collet function for a hammer and an electric drill, which is mounted on an electric power tool 100, including: a flexible joint The rod 10, an elastic collet 20, a kit 30, a first sleeve 40, a drill bit 50, and a second sleeve 60.

The elastic pole 10 is a hollow rod body, and a first sleeve portion 11 and a first clamping portion 12 are respectively disposed at two ends thereof, and the first socket portion 11 has a tapered hole 111 therein, and A first threaded portion 112 and a polygonal portion 113 are continuously disposed outside the first socket portion 11. The tapered hole 111 is a circular inner hole with a taper, and the taper is the same as the taper of the elastic collet 20 The first clamping portion 12 can be circular or polygonal, and the shape thereof depends on the electric power tool 100 used. The first clamping portion 12 can be inserted into the electric device. The chuck 110 of the machine tool 100 transmits energy for hammering and rotating the power tool 100. In this embodiment, the polygonal portion 113 is a hexagonal shape, and serves as a second sleeve 60 for connecting the first sleeve 40 and further transmitting the rotational energy of the power tool 100 to the lock screw connected to the first sleeve 40, and the front end of the polygonal portion 113 is provided. The first threaded portion 112 is coupled to the sleeve 30 to fix the elastic collet 20 and the drill bit 50 to the elastic post 10, and the first threaded portion 112 and the polygonal portion 113 of the first sleeve portion 11 have a first Circular groove 114.

The elastic collet 20 is a hollow elastic cylinder with a taper. One end of the elastic collet 20 and the tapered hole 111 are coupled to each other, and the other end of the elastic collet 20 is provided with a second clamping portion. 21, which is composed of a plurality of clips 211 equidistantly arranged in a ring shape, and each of the clips 211 has a cutting groove 212 therebetween, whereby the taper portion of the elastic collet 20 is cut into three equal parts or four equal parts. , the aliquot or the halving, wherein the diameter of the inner bore is determined by the diameter of the bit 50 to be clamped, wherein the outer wall of the elastic collet 20 is provided with a first joint portion 22, in this embodiment, the first The joint portion 22 is an annular flange, but is not limited thereto.

The kit 30 is a hollow sleeve that is sleeved outside the elastic collet 20 and is interlocked with the elastic collet 20. The second threaded portion 31 and the first of the elastic post 10 are disposed in the sleeve 30. The threaded portions 112 are coupled to each other, wherein the inner wall surface of the sleeve 30 is provided with a second joint portion 32, and the second joint portion 32 and the first joint portion 22 of the elastic collet 20 are movably coupled to each other, this embodiment The second joint portion 32 is an annular groove, but is not limited thereto. The second threaded portion 31 of the kit 30, with the first threaded portion 112 on the resilient post 10, compresses the elastic collet 20 inwardly to secure the elastic collet 20 and the drill bit 50 to the resilient post 10. Preferably, the front end of the kit 30 is provided with a parallel end face cut to facilitate the rotation of the wrench.

The first sleeve 40 is a hollow sleeve, one end of which is sleeved on the first socket portion 11 and is coupled with the polygonal portion 113, and the other end of the first sleeve 40 is provided with a hollow sleeve. The second sleeve portion 41 includes a clutch portion 42 , an outer ring sleeve 43 , two springs 44 , a first through hole 45 , and a first ball body 46 . The first hole portion 41 . 45 is disposed at the center of the clutch area 42 and corresponds to the first circular arc groove 114 of the first socket portion 11. The outer ring sleeve 43 and the two springs 44 are sleeved on the clutch area 42 and the outer portion The ring sleeve 43 is resisted between the two springs 44 and presses the first ball 46 so that the first ball 46 is located in the first through hole 45 and protrudes from the inner wall surface of the first sleeve 40 and resists the a first circular arc groove 114, wherein the two ends of the clutch portion 42 are respectively provided with a first stopping portion 421 and a second stopping portion 422, wherein the two springs 44 are located at the first stopping portion 421 and the The second stopping portion 422 is a flange, and the second stopping portion 422 is composed of a card groove 4221 and a circlip 4222. The circlip 4222 is engaged. In the card groove 4221, a third circular arc groove 431 is disposed at each end of the inner wall surface of the outer ring sleeve 43, and a gap is formed between the two third circular arc grooves 431, and the outer ring sleeve 43 is disposed at both ends. Have the same number of turns Spring 44, with a circular circlip 44 fixed spring 4222, as the fixing device into and out of the bidirectional clutch.

The rear end of the drill bit 50 (generally referred to as a handle or a handle) is inserted into the second clamping portion 21 of the elastic collet 20, and the elastic collet 20 is clamped to the sleeve 30 and the elastic The post 10 is for drilling on the workpiece.

The second sleeve 60 is a hollow circular sleeve that is detachably coupled to the first sleeve 40. The second sleeve 60 is respectively provided with a third sleeve portion 61 and a first portion. The four socket portions 62 are correspondingly coupled to the second socket portion 41, and the fourth socket portion 62 is detachably coupled to a screw lock member 70. In this embodiment, the second socket portion 41 is a connecting member with an outer hexagonal shape, and the third socket portion 61 is sleeved on the outer wall surface of the second socket portion 41, and the second sleeve portion The second hole 612 includes a second ball 611 , a second through hole 612 , a second buckle 613 , and a second annular groove 614 . The second through hole 612 is disposed on the second annular groove 614 . The outer wall surface of the second socket portion 41 has a second circular arc groove 411. The second buckle ring 613 is sleeved on the second annular groove 614 and presses the second spherical body 611. The second ball 611 is located in the second through hole 612 and protrudes from the inner wall surface of the third socket portion 61 and resists the second circular arc groove 411, and the fourth socket portion 62 is sleeved thereon. The second sleeve 60 includes a third ball 621, a third through hole 622, a third buckle 623, and a third annular groove 624. The third through hole 622 is provided. In the third annular groove 624, the outer wall surface of the screw lock 70 has a fourth circular arc groove 71, and the third buckle ring 623 is sleeved on the third annular groove 624 and presses the first The third ball 621 is disposed in the third through hole 622 and protrudes from the inner wall surface of the fourth socket portion 62 and resists the fourth circular arc groove 71.

Referring to FIG. 7 , the fourth socket portion 62 is detachably coupled to a rear end of a screw lock member 70 (generally referred to as a handle portion), and the screw lock member 70 can be a screw of various specifications and forms. The head or the screw head is combined with the sleeve, and the screw lock 70 can select a corresponding form for different screw heads, for example, the screw head is an inner hexagon, an outer hexagon, a cross, a shape, and the like.

In use, first, the drill bit 50 is placed into the second clamping portion 21 of the elastic collet 20 through the inner hole of the sleeve 30 (that is, the inner hole of the elastic collet 20 which is composed of a plurality of clips 211 equidistantly arranged annularly), and then Inserting the elastic collet 20 into the tapered hole 111 of the first socket portion 11 of the elastic post 10, rotating the sleeve 30 to fix the drill bit 50 to the elastic post 10; The tube 40 is inserted into the direction of the drill bit 50 and pulls the outer ring sleeve 43 to fit the first sleeve into the polygonal portion 113 of the elastic post 10; thirdly, the elastic post 10 is inserted into the chuck of the electric power tool 100 110, the first clamping portion 12 of the resilient post 10 is placed in the corresponding engagement portion 120 of the collet 110 of the power tool 100. Turning on the power of the power tool 100 to drill a hole in a predetermined position on the workpiece; fourth, inserting the rear end of the second sleeve 60 into the front end of the first sleeve 40 and using the second sphere 611 and the second through hole 612 and The second buckle 613 is configured to fix the second sleeve 60 to the first sleeve 40; and fourth, the front end of the second sleeve 60 is inserted into the screw lock 70 corresponding to the screw head type, and the matching The third ball 621, the third through hole 622 and the third buckle 623 fix the screw lock 70 on the second sleeve 60; fifthly, the electric power tool 100 is activated to lock the screw into the workpiece at an appropriate rotation speed; Finally, the second casing 60 is taken out to perform the drilling operation. In this way, it is only necessary to repeatedly insert and take out the second sleeve 60, and the drilling and the locking screw can be easily and efficiently performed.

Referring to FIG. 8 , in another embodiment, the difference between the embodiment and the foregoing embodiment is that a first sleeve portion 11 and a first clamping portion 12 are respectively disposed at two ends of the elastic pole 10 , and the first sleeve is disposed. A first threaded portion 112 and a polygonal portion 113 are continuously disposed outside the connecting portion 11 , and one end of the elastic collet 20 is connected to the first socket portion 11 , and the other end of the elastic collet 20 has an outer taper. The sleeve 30 has an inner taper (having the same function as the tapered hole 111 described in the previous embodiment), and the second threaded portion 31 and the first threaded portion 112 are coupled to each other in the sleeve 30 to make the elastic The other end of the collet 20 is fitted to the kit 30 in correspondence with each other.

In another embodiment (not shown), the difference from the previous embodiment is that the second sleeve portion is sleeved on the outer wall surface of the third socket portion, and the first sleeve includes a second portion. a second perforation is disposed in the second annular groove, and the second wall of the third sleeve has a second arc a groove, the second buckle sleeve is sleeved on the second annular groove and presses the second ball, so that the second ball is located in the second through hole and protrudes from the inner wall surface of the second sleeve portion and resists In the second circular arc groove, by this, the same effects as the foregoing embodiment can be achieved.

The present invention is characterized in that the elastic collet 20 is coupled with the sleeve 30, and the sleeve 30 further screws the elastic post 10, and the first sleeve is respectively coupled with the elastic post 10 And the second sleeve 60, the operation of drilling and locking the screw by using the same electric power tool 100 is achieved, thereby improving the work efficiency and reducing the cost; and the elastic clip 20 is used by the plurality of clips 211 having elasticity. The special design is made to achieve the effect that the drill bit can be applied to various diameters to achieve simple operation and reduce cost; and the first sleeve 40 further comprises a clutch zone 42, an outer ring sleeve 43, and two springs 44. The special design achieves the effect of fixing and disengaging the two-way clutch device, and the convenient performance effectively reduces the physical load of the constructor, greatly improves the work efficiency of the constructor and saves a large amount of construction cost.

The present invention is not limited to the scope of the present invention, and the shapes described in Structures, features, and spirits are subject to change. Therefore, the scope of patent protection of this creation is subject to the definition of the scope of the patent application attached to this specification.

10‧‧‧Flexible Posts

40‧‧‧First casing

60‧‧‧second casing

70‧‧‧ Screw locks

Claims (12)

The utility model relates to a drill with an elastic collet function for an electric hammer and an electric drill, and a locking screw post, which comprises: an elastic connecting rod, which is a hollow rod body, and a first sleeve portion and a first portion are respectively arranged at two ends thereof a clamping portion, and a first threaded portion and a polygonal portion are continuously disposed outside the first socket portion; an elastic collet is a hollow cylinder, and one end of the elastic collet is coupled to the first sleeve The other end of the elastic collet is provided with a second clamping portion, which is composed of a plurality of clips equidistantly arranged in a ring shape, each of which has a cutting groove therebetween; a kit is a hollow sleeve The sleeve is sleeved outside the elastic collet, and the second threaded portion and the first threaded portion are respectively coupled to each other; a first sleeve is a hollow sleeve, and one end is sleeved on the first sleeve a set of joints and correspondingly coupled to the polygonal portion, and the other end of the first sleeve is provided with a second sleeve portion; a drill bit is inserted into the second clamping portion of the elastic collet, and The elastic collet is clamped to the sleeve and the elastic post; and a second sleeve is a hollow sleeve, which is separable The ground is coupled to the first sleeve, and a second sleeve portion and a fourth socket portion are respectively disposed at two ends of the second sleeve, and the third sleeve portion and the second sleeve portion are coupled to each other. And the fourth socket portion is detachably coupled to a screw lock member. A drill hole with an elastic collet function for a hammer and an electric drill according to the first aspect of the invention, which has a locking screw post, wherein the first socket has a tapered hole therein, and the elastic cylinder One end of the clip has an outer taper and is fitted to the tapered bore. A drilled hole with an elastic collet function for a hammer and an electric drill according to the first aspect of the invention, which has an inner taper, and the other end of the elastic collet has The outer taper is fitted to the kit. A drill with an elastic collet function for an electric hammer and an electric drill according to claim 1 of the patent application scope The hole also has a lock screw post, wherein the first clamping portion is circular or polygonal. The drilled hole with the elastic collet function for the electric hammer and the electric drill according to the invention of claim 1 has a lock screw post, wherein the outer wall surface of the elastic collet is provided with a first joint portion, and the inside of the sleeve The wall surface is provided with a second joint portion, and the first joint portion and the second joint portion are movably coupled to each other. The drill hole with the elastic collet function for the electric hammer and the electric drill according to the first aspect of the patent application has a lock screw post, wherein the first sleeve comprises a clutch zone, an outer ring sleeve, and two a first circular hole, and a first circular arc groove between the first threaded portion and the polygonal portion of the first socket portion, the first through hole is disposed in the clutch portion a central portion corresponding to the first circular arc groove, the outer ring sleeve and the two spring sleeves are sleeved on the clutch area, and the outer ring sleeve is resisted between the two springs and the first ball is pressed The first ball is located in the first through hole and protrudes from an inner wall surface of the first sleeve and resists the first circular arc groove. The drill hole with the elastic collet function for the electric hammer and the electric drill according to the sixth aspect of the patent application has a lock screw post, wherein the outer ring sleeve has a third arc at each end of the inner wall surface. Groove. The drill hole with the elastic collet function for the electric hammer and the electric drill according to the sixth aspect of the patent application has a lock screw post, wherein the two ends of the clutch zone are respectively provided with a first stop portion and a first The two stops are located between the first stop and the second stop. A drill having an elastic collet function for an electric hammer and an electric drill according to the invention of claim 8 which has a lock screw post, wherein the first stop portion is a flange, and the second stop The department is composed of a card groove and a circlip, and the circlip is engaged in the card groove. The drill hole with the elastic collet function for the electric hammer and the electric drill according to the first aspect of the patent application has a lock screw post, wherein the third sleeve portion is sleeved on the second sleeve portion. An outer wall surface, and the second sleeve comprises a second ball, a second through hole, a second buckle, and a second a second annular groove, the second through hole is disposed in the second annular groove, and the outer wall of the second sleeve portion has a second circular groove, and the second buckle is sleeved on the second annular groove The second annular groove presses the second ball such that the second ball is located in the second through hole and protrudes from the inner wall surface of the third socket and resists the second circular groove. The drill hole with the elastic collet function for the electric hammer and the electric drill according to the first aspect of the patent application has a lock screw post, wherein the second socket portion is sleeved on the third socket portion. An outer wall, and the first sleeve includes a second ball, a second through hole, a second buckle, and a second annular groove, the second through hole is disposed in the second annular groove, and the second The outer wall of the three sleeves has a second circular arc groove, the second buckle sleeve is sleeved on the second annular groove and presses the second sphere, so that the second sphere is located in the second perforation And protruding from the inner wall surface of the second socket portion and resisting the second circular arc groove. The drill hole with the elastic collet function for the electric hammer and the electric drill according to the first aspect of the invention is also a lock screw post, wherein the fourth socket portion is sleeved outside the screw lock member. a wall, and the second sleeve includes a third ball, a third through hole, a third buckle, and a third annular groove, the third through hole is disposed in the third annular groove, and the screw lock The outer wall of the piece has a fourth circular arc groove, the third buckle sleeve is sleeved on the third annular groove and presses the third ball, so that the third ball is located in the third perforation and protrudes from The inner wall surface of the fourth socket portion is resisted by the fourth circular arc groove.