TW202012120A - Fastener extractor and dislodging tool apparatus - Google Patents

Abstract

A fastener extractor and dislodging tool apparatus includes a torque-tool body, a threaded opening, a plurality of engagement features, and a release bolt. The plurality of engagement features that grips the lateral surface of the stripped fastener is radially positioned around a rotation axis of the torque-tool body. The plurality of engagement features being perimetrically connected around a base of the torque-tool body thus delineating a socket body that removes the stripped fastener. The threaded opening traverses through the base so that the release bolt can be threadedly engaged with the threaded opening, opposite of the plurality of engagement features. When the stripped fastener is jammed within the plurality of engagement features, the release bolt can be threadedly moved into the space between the plurality of engagement features thus dislodging the stripped fastener from the torque-tool body.

Description

Combination of fastener removal tool and fastener withdrawal device

The present invention relates to tools of various designs to remove or remove fasteners, such as bolts and nuts. The invention particularly relates to a combination of a fastener removal tool and a fastener withdrawal device, wherein the fastener removal tool can remove the damaged fastener without slipping with the damaged fastener, and the fastener withdrawal device can remove the fastener The broken fastener is withdrawn from the tool removal tool.

Hexagon bolts, nuts, screws, and other similar threaded devices are used to securely join multiple workpieces by combining complementary threads, such as male or female threads. The structure of these types of fasteners usually has a cylindrical shaft, an external thread on the surface of the shaft, and a head at one end of the shaft. The external thread is combined with a complementary female thread tapped into the hole or nut to fix the fastener and join the work pieces together. The head of the fastener receives an external torque. The head of the fastener is a means for rotating or driving the fastener into the female thread. The head of the fastener is made into a special shape to allow external tools, such as a wrench, to apply torque to the fastener, allowing the fastener to be bonded to the female thread to some extent. These fasteners are simple, cheap and effective, so they are commonly used in modern industry. One of the most common problems with using these fasteners is that whether they are male or female thread fasteners, these external tools, such as wrenches, will slide on their heads. This problem is often caused by: worn fasteners or tools, corrosion, excessive tightening, or damage to the head of the fastener. There are various conventional methods for removing fasteners, some of which are more aggressive. Once the head of the fastener is damaged, a more aggressive method must be used to remove the fastener locked by the clip. In this case, digging fasteners with an electric drill is a method that some users often use to remove fasteners. Although this method is indeed effective in some occasions, it has a high risk of damaging the internal thread of the screw hole.

The invention provides a combination of a fastener removal tool and a fastener withdrawal device, which can surely eliminate the possibility of slippage between the fastener and the removal tool. The present invention uses a series of keyway structures combined together to bite the head of the fastener, and effectively transfer torque between the tool for removing the fastener and the head of the fastener. The invention also solves the common problems of the traditional bolt removal tool, for example: the problem that the head of the fastener or the fastener itself is attached or adhered to the fastener removal tool. Furthermore, the present invention allows a user to use a fastener withdrawing device to easily withdraw residual materials or removed fasteners from the fastener extraction tool.

In one embodiment, the combination of the fastener extraction tool and the fastener withdrawal device of the present invention includes: a torsion tool body, a threaded opening, a plurality of coupling features, and an ejection bolt, wherein the plurality of coupling features are distributed in the torsion force The tool body is around a rotating shaft; a plurality of coupling features are connected around a base of the torsion tool body; a threaded opening passes through the base; the exit bolt may be screwed to the threaded opening, and relative to the plurality of coupling features.

In one embodiment, the combination of the fastener removal tool and the fastener withdrawal device of the present invention further includes: an attachment portion and a coupling hole, wherein the center of the attachment portion is located on the rotation axis, and the attachment portion is along the rotation axis Distribution; the attachment part is connected to the base of the torsion tool body, and the attachment part is relative to a plurality of coupling features; the coupling hole passes through the attachment part along the rotation axis.

In one embodiment, the exit bolt of the present invention includes: a tapered tapered portion, a threaded shank portion, and a driving portion; wherein the tapered tapered portion and the driving portion are opposed to each other across the threaded shank portion; the tapered tapered shape The constricted part is concentrically connected to one end of the threaded shank; the driving part is concentrically connected to the other end of the threaded shank.

When using the present invention to remove a broken/frayed fastener, the user places the torsion tool body around the broken/frayed fastener, allowing a plurality of coupling features to surround the broken/frayed fastener with a considerable length , And then apply a counterclockwise torque to the torque tool body, you can rotate and remove the broken / worn fasteners.

When the broken/frayed fastener needs to be withdrawn from the plurality of coupling features, the user combines the threaded shank with the threaded opening so that the tapered tapered portion is within the plurality of coupling features. Then, the user applies an appropriate clockwise or counterclockwise torque to the eject bolt via the driving part, and converts the rotating force into a linear force until the broken/frictiond fastener is released from the plurality of coupling features.

1‧‧‧Torque tool body

10‧‧‧Any combination of features

11‧‧‧adjacent combined features

12‧‧‧Exit bolt

13‧‧‧ tapered part

14‧‧‧Threaded rod

15‧‧‧Drive Department

16‧‧‧ Attachment Department

17‧‧‧Combination hole

2‧‧‧rotation axis

3‧‧‧Base

31‧‧‧The bottom of the attachment

32‧‧‧Top surface of torque tool body

4‧‧‧Threaded opening

5‧‧‧Combined features

6‧‧‧The first inclined area

7‧‧‧Bend

8‧‧‧Second inclined area

81‧‧‧Nearby

82‧‧‧ Remote area

FIG. 1 is a perspective view showing a torsion tool body, a plurality of coupling features, and an ejection bolt according to an embodiment of the present invention.

2 is an upper view showing the bottom surface of a torsion tool body and an attachment element according to an embodiment of the present invention.

FIG. 3 is an upper view showing a torsion tool body and a plurality of combining features according to an embodiment of the present invention, and details are shown in FIG. 4.

FIG. 4 shows details of a plurality of combining features according to an embodiment of the present invention within the area A of FIG. 3.

5 is a side view showing a torsion tool body according to an embodiment of the present invention, and the cross section taken along line AA is shown in FIG. 6.

6 is a cross-sectional view showing a cross-section of the torsion tool body taken from line AA of FIG. 5.

7 is a side view showing an ejection bolt according to an embodiment of the present invention.

8 is a cross-sectional view showing a torsion tool body, a plurality of coupling features, and an exit bolt according to an embodiment of the present invention.

9 is a top view showing a torsion tool body and a plurality of coupling features according to a first other embodiment of the present invention, and the details are shown in FIG. 10.

FIG. 10 shows the details of the plurality of combining features according to the first other embodiment of the present invention within the area A of FIG. 9, and the details within the area B are shown in FIG. 11.

FIG. 11 shows details of a plurality of combining features according to the first other embodiment of the present invention within the area B of FIG. 10.

FIG. 12 is a top view showing a torsion tool body and a plurality of coupling features according to a second other embodiment of the present invention.

First of all, it should be particularly explained that the illustrations used in this specification are only used to illustrate some embodiments of the present invention, and the scope of the present invention is not limited by these illustrations.

The invention relates to a technology for a fastener take-out tool and a fastener take-out tool accessory. The invention discloses a combination of a fastener removal tool and a fastener withdrawal device. It is a difficult job to remove broken or worn fasteners from the fastener removal tool. The present invention solves this problem by revealing an ejection device, in which the ejection device is selectively combined with a removal tool. This ejection device is specially designed to assist the user to remove any broken or worn fasteners that have been clamped to the fastener extraction tool. Furthermore, the present invention is compatible with male components of fasteners. Fasteners using male components, also known as male fasteners, use the outer side of the head of the fastener as a coupling position with a locking or loosening tool, such as hexagon bolts and nuts. An example of a male fastener is a bolt with a hexagonal head. Furthermore, the present invention is compatible with male fasteners with right-hand threads and male fasteners with left-hand threads.

Please refer to Figure 1 and Figure 8. The invention includes: a torsion tool body 1, a threaded opening 4, a plurality of coupling features 5, and an exit bolt 12. The torque tool body 1 exerts a related force on the head of the fastener through a plurality of coupling features 5. As far as the male fastener is concerned, the torque tool body 1 is a tubular protrusion whose size allows it to wrap the male fastener in an interlocking manner, just like a conventional wrench socket. The length, width, and diameter of the torque tool body 1 can be designed to fit male fasteners of various sizes. The plurality of combining features 5 can prevent the fastener from sliding when the fastener is taken out, and it is distributed around a rotation axis 2 of the torque tool body 1 as shown in FIG. 3. Furthermore, a plurality of coupling features 5 are connected around a base 3 of the torque tool body 1 to engage the side surface of the fastener head. By preventing the sliding between the torque tool body 1 and the head of the fastener, the plurality of coupling features 5 can transmit the torque to the male fastener. The threaded opening 4 passes through the base 3 as an attachment feature of the exit bolt 12. Furthermore, the exit bolt 12 is screwed into the threaded opening 4 and is relative to the plurality of coupling features 5. Thus, when the broken/frayed fastener is taken out and the plurality of coupling features 5 are plugged, the eject bolt 12 can push out or withdraw the broken/frayed fastener from the plurality of coupling features 5.

Please refer to Figures 1 to 3. The torque tool body 1 extends outward from the plurality of coupling features 5. This produces a socket-like structure in which a plurality of coupling features 5 are distributed around the axis of rotation 2 on the inner surface of the torsion tool body 1 like a conventional socket for a wrench. Furthermore, a wrench handle can be connected to the outer side surface of the torque tool body 1 by a wrench handle attachment portion. Regarding both the wrench socket and the wrench handle attachment portion, each of the plurality of coupling features 5 extends along the torque tool body 1 by a specific length, thus defining an internal space in the torque tool body 1. This internal space serves as a receiving cavity for the head of the fastener, and a plurality of coupling features 5 can engage the side surface of the head of the fastener.

The traditional socket wrench transmits most of the torsional force to the male fastener through the corners on the side of the fastener head. Over time, the deterioration of the side corners reduces the efficiency of transferring torque from the socket wrench to the head of the fastener and causes slippage. The present invention solves the above problem by transferring the torque transmission point to the side of the head of the fastener. This is achieved by using a plurality of combining features 5. Each of the plurality of coupling features 5 is arranged at a position where the side of the head of the fastener can be coupled or bitten, instead of the side corners. In this way, an appropriate amount of torque can be transmitted to the head of the fastener, causing the fastener to rotate, and finally the broken/frictiond fastener can be taken out.

Please refer to Figures 3 to 4. In a preferred embodiment of the present invention, the cross section of each of the plurality of bonding features 5 includes: a first inclined region 6, a curved portion 7, and a second inclined region 8. In detail, the first inclined area 6 is connected to one end of the curved portion 7; the second inclined area 8 is connected to the other end of the curved portion 7; the first inclined area 6 and the second inclined area 8 are opposed to each other across the curved portion 7. Thus, a bite edge is formed between a pair of coupling features 5 or within a coupling feature 5. In this way, when removing the broken/frayed fastener, the bite blade can cut into the fastener head. A top surface 32 of the torque tool body 1 is located between the outer surface of the base 3 and the plurality of coupling features 5, wherein the top surface 32 is a flat surface. There is a transitional edge between the top surface 32 of the base 3 and the plurality of joining features 5, wherein the transitional edge is a chamfered edge or a curved edge, and the transitional edge faces the threaded opening 4. In one embodiment of the present invention, the first inclined region 6 and the second inclined region 8 are collinear with each other or concave inward, so that the first inclined region 6 and the second inclined region 8 form an acute angle to the curved portion 7.

In a preferred embodiment of the present invention, a plurality of coupling features 5 are equidistantly distributed on the torsion tool body 1 to form a closed shape as shown in FIGS. 3 and 4. In the present invention, the lengths of the first inclined area 6, the curved portion 7, and the second inclined area 8 can be changed; the angle between the first inclined area 6, the curved portion 7, and the second inclined area 8 can also be changed to Forms a sharp tooth structure. In order to plan this closed shape, an arbitrary joint feature 10 and an adjacent joint feature 11 are defined within the plurality of joint features 5. Any combination feature 10 is any one of a plurality of combination features 5, and adjacent combination features 11 are directly adjacent to any combination feature 10. More specifically, the first inclined region 6 of any bonding feature 10 is connected to the second inclined region 8 of an adjacent bonding feature 11 at an obtuse angle. In other words, the angle between the adjacent first inclined region 6 and the second inclined region 8 is an obtuse angle, and thus defines the shape of the bite edge. As described above, the present invention can be designed to adapt to the shape of various fastener heads. This can be achieved by changing the number of combining features 5. The number of the plurality of coupling features 5 generally corresponds to the number of sides of the head of the fastener. For example, a pentagonal fastener head has 5 sides. The user must use the embodiment of the present invention with 5 joint features 5 to remove the male fastener with 5 side fastener heads. In the preferred embodiment of the present invention, the number of the plurality of combining features 5 may be 18, 12, 6, or 4.

Please refer to FIGS. 9 to 11. In a first other embodiment of the invention, the cross-section of each of the plurality of bonding features 5 includes: a first inclined region 6, a curved portion 7, and a second inclined region 8; a second inclined region 8 It also includes a near zone 81 and a far zone 82. More specifically, the first inclined area 6 is connected to one end of the curved portion 7; one end of the near area 81 of the second inclined area 8 is connected to the other end of the curved portion 7; the first inclined area 6 and the second inclined area 8 The near area 81 is opposed to each other across the curved portion 7; the far area 82 of the second inclined area 8 is connected to the other end of the near area 81 of the second inclined area 8 and is opposed to the curved portion 7. Thus, a bite edge is formed between the near area 81 of the second inclined area 8 and the far area 82 of the second inclined area 8. In this way, when removing the broken/frayed fastener, the bite blade can cut into the fastener head. Furthermore, the angle between the near zone 81 of the second inclined zone 8 and the far zone 82 of the second inclined zone 8 is an obtuse angle, and the shape of the occlusal blade is thus defined.

In a first other embodiment of the present invention, a plurality of coupling features 5 are equidistantly distributed on the torsion tool body 1 to form a closed shape as shown in FIGS. 9 to 11. In this embodiment, the lengths of the first inclined area 6, the curved portion 7, and the second inclined area 8 can be changed; the angle between the first inclined area 6, the curved portion 7, and the second inclined area 8 can also be changed to Forms a sharp tooth structure. In order to plan this closed shape, an arbitrary joint feature 10 and an adjacent joint feature 11 are defined within the plurality of joint features 5. Any combination feature 10 is any one of a plurality of combination features 5, and adjacent combination features 11 are directly adjacent to any combination feature 10. More specifically, when the near region 81 and the far region 82 are adjacent to each other and at an obtuse angle relative to the adjacent bonding feature 11, the first inclined region 6 of any bonding feature 10 is connected to the far region of the adjacent bonding feature 11 at a right angle 82.

In some of the first other embodiments of the present invention, the angle of the first inclined region 6 and the far region 82 is equal to the angle of the far region 82 and the near region 81, where the far region 82 is along the fastener head Side surface distribution. Furthermore, the first inclined region 6, the far region 82, and the near region 81 define a trapezoidal shape.

Please refer to Figure 12. In a second other embodiment of the invention, the cross-section of each of the plurality of bonding features 5 includes: a first inclined region 6, a curved portion 7, and a second inclined region 8. The curved portion 7 further includes: a first area, a second area, a third area, and a fourth area. More specifically, the first zone is adjacent to the second zone; the third zone is adjacent to the second zone and is relative to the first zone; the fourth zone is adjacent to the third zone and is relative to the second zone. Thus, one end of the first inclined area 6 is connected to the first area; one end of the second inclined area 8 is connected to the fourth area, wherein the first inclined area 6 and the second inclined area 8 are opposed to each other via the curved portion 7. Furthermore, the first inclined area 6 and the second inclined area 8 are arranged in line with each other, and the curved portion 7 protrudes toward the rotating shaft 2. Thus, one bite blade is formed in the curved portion 7. In this way, when removing the broken/frayed fastener, the bite blade can cut into the fastener head. Furthermore, the first area, the second area, the third area, and the fourth area may be designed as a plurality of straight line areas, a plurality of curved areas, or a combination of straight line areas and curved areas.

Moreover, in a second other embodiment of the present invention, a plurality of coupling features 5 are arranged at equal distances on the torsion tool body 1 to form a closed shape as shown in FIG. 12. The lengths of the first inclined area 6, the curved portion 7, and the second inclined area 8 can all be changed; the angle between the first inclined area 6, the curved portion 7, and the second inclined area 8 can also be changed to form sharp teeth状结构。 Shaped structure. In order to plan this closed shape, an arbitrary joint feature 10 and an adjacent joint feature 11 are defined within the plurality of joint features 5. Any combination feature 10 is any one of a plurality of combination features 5, and adjacent combination features 11 are directly adjacent to any combination feature 10. In more detail, the first inclined region 6 of any bonding feature 10 is connected to the second inclined region 8 of the adjacent bonding feature 11 at an obtuse angle. In other words, the angle between the adjacent first inclined region 6 and the second inclined region 8 is an obtuse angle, and defines the connection point between the pair of coupling features 5 to become the bite edge within the curved portion 7.

In some embodiments of the invention, the plurality of coupling features 5 may taper from the top surface 32 toward the threaded opening 4, wherein the diameter of the plurality of coupling features 5 adjacent to the threaded opening 4 is smaller than that adjacent to the receiving cavity or A plurality of diameters of the bonding feature 5 adjacent the top surface 32.

The present invention also includes an attachment feature that allows an external torque tool to be attached to the torque tool body 1 to increase the torque applied to the broken/frayed fastener. Please refer to Figures 5 and 6. The present invention further includes an attachment portion 16 and a coupling hole 17, which allows an external tool to be attached to the torque tool body 1, such as an open-end wrench, a closed-end wrench, a combination wrench, an adjustable wrench, or a socket wrench. The center of the attachment portion 16 is located on the rotation shaft 2 and the attachment portion 16 is distributed along the rotation shaft 2 so that the rotation axis of the torque tool is aligned with the rotation shaft 2. Moreover, the attachment portion 16 is connected to the base portion 3 of the torque tool body 1 and is opposite to the plurality of coupling features 5. In the preferred embodiment of the present invention, the attachment portion 16 has a hexagonal configuration; the diameter of the attachment portion 16 is slightly larger than the diameter of the base portion 3 of the torque tool body 1. However, depending on the size, manufacturing method, and design of the base, the diameter of the attachment portion 16 may be smaller than the diameter of the base 3. The coupling hole 17 passes through the attachment portion 16 along the rotation shaft 2. The shape of the coupling hole 17 can accept a male attachment element of a socket wrench. Since most socket wrenches use a square male attachment element, the shape of the coupling hole 17 is preferably square. In other embodiments of the present invention, the design and shape of the attachment portion 16 and the coupling hole 17 can be changed to accommodate different torsion tools and different attachment means. For example, the shape of the coupling hole 17 may be, but not limited to, square or cylindrical. In other embodiments of the present invention, the outer surface of the attachment portion 16 may be subjected to surface gripping treatments, such as knurling or other treatments, to increase the friction between the torque tool body 1 and any driving embodiment.

Please refer to Figure 2 and Figure 6. One bottom surface 31 of the attachment portion 16 is gradually inclined from the coupling hole 17, so that a plurality of coupling features 5 can be knocked into the broken/frayed fastener with hammering without damaging the coupling hole 17. In other words, the height of the attachment portion 16 near the coupling hole 17 is slightly larger than the height of the attachment portion 16 near the outer surface, so that the bottom surface 31 is gradually inclined from the coupling hole 17.

Please refer to Figure 7. The ejection bolt 12 for ejecting the broken/frictiond fastener includes: a tapered tapered portion 13, a threaded rod portion 14, and a driving portion 15. More specifically, the tapered tapered portion 13 and the driving portion 15 face each other across the threaded rod portion 14. In a preferred embodiment of the present invention, the cross section of the threaded shank 14 may be circular. The tapered tapered portion 13, the threaded rod portion 14 and the driving portion 15 are coaxially arranged with each other, so that the tapered tapered portion 13 is concentrically connected to one end of the threaded rod portion 14, and the drive portion 15 is concentrically connected to the threaded rod portion 14 The other end. Furthermore, a hole can penetrate into the side of the driving part 15 to allow a torsion-applying shank to be combined with the hole. When the eject bolt 12 is combined with the coupling hole 17, a torque is applied to the eject bolt 12. This hole can be of any shape, including: round, square, or any other geometric shape.

In order to achieve the coupling between the threaded opening 4 and the withdrawal bolt 12, the threaded shank 14 is designed to be able to fit the receiving thread (female thread) of the threaded opening 4. When the broken/frayed fastener needs to be withdrawn, the threaded shank 14 is combined with the threaded opening 4. Thus, the tapered tapered portion 13 is located within the plurality of coupling features 5, and the drive portion 15 is at a position away from the torque tool body 1. The user can apply an appropriate clockwise or counterclockwise torque to the eject bolt 12 via the driving part 15 and convert the rotating force into a linear force until the broken/frictiond fastener is released from the socket. Due to the position of the tapered tapered portion 13 within the plurality of coupling features 5, the application of linear force can bring the tapered tapered portion 13 into contact and push out the broken/frayed fastener. In a preferred embodiment of the present invention, the driving portion 15 has a hexagonal structure. In other embodiments of the present invention, the driving portion 15 may be, but not limited to, a square configuration, a circular configuration, or other configurations that can be adapted to different socket wrenches or similar tools that apply rotational force. The tapered tapered portion 13 may be made into a cylindrical configuration, a square configuration, a hexagonal configuration, or other configurations desired by the user/manufacturer. The threaded shank portion 14 can be any shape of shank structure, which can be, but is not limited to, a semi-circular structure, a semi-square structure, or any other geometric shank structure that can be used for male threads.

In order to use the present invention to remove damaged/frictiond fasteners, the torque tool body 1 is placed around the damaged/frictiond fasteners, and a plurality of coupling features are wrapped around the damaged/frictiond fasteners with a considerable length. The user applies a counterclockwise torque to the torque tool body 1 to rotate and remove the broken/frayed fastener. When a torsional force is applied to the torsion tool body 1, a plurality of coupling features 5 will "bite" into the side of the head of the fastener and then rotate the fastener. The present invention is designed to partially or fully incorporate worn fastener heads. Each of the plurality of coupling features 5 of the present invention has a bite edge. With a plurality of combining features 5, the present invention can overcome the problem of the head of the fastener sliding.

The invention has been described above with examples. However, it should be understood that, without departing from the spirit or application scope of the present invention, modifications or changes made to these embodiments are still included in the scope of the present invention.

1‧‧‧Torque tool body

5‧‧‧Combined features

12‧‧‧Exit bolt

16‧‧‧ Attachment Department

32‧‧‧Top surface of torque tool body

Claims (7)

A combination of a fastener taking-out tool and a fastener withdrawing device includes: a torsion tool body; an opening with a thread; a plurality of coupling features; and an ejection bolt, wherein the plurality of coupling features are distributed on the torsion tool body Around the rotating shaft; the plurality of coupling features are connected around a base of the torsion tool body; the threaded opening passes through the base; the exit bolt is screwed to the threaded opening, and relative to the plurality of couplings feature. The combination of the fastener taking-out tool and the fastener withdrawing device as described in item 1 of the application scope, wherein the torsion tool body extends outward from a transverse face of the plurality of coupling features. The combination of the fastener taking-out tool and the fastener withdrawing device as described in item 1 of the application scope, wherein the cross-section of each of the plurality of coupling features includes: a first inclined region, a curved portion, and a first Two inclined areas; the first inclined area is connected to one end of the curved portion; the second inclined area is connected to the other end of the curved portion; the first inclined area and the second inclined area are opposed to each other across the curved portion. The combination of a fastener extraction tool and a fastener withdrawal device as described in item 3 of the application scope, wherein the plurality of coupling features include: an arbitrary coupling feature and an adjacent coupling feature; the first inclined region of the arbitrary coupling feature The second inclined region is connected to the adjacent bonding feature at an obtuse angle. The combination of the fastener taking-out tool and the fastener withdrawing device described in item 1 of the application scope further includes: an attachment portion and a coupling hole, wherein the center of the attachment portion is located on the rotation axis, and the attachment The attachment portion is distributed along the rotation axis; the attachment portion is connected to the base portion of the torsion tool body, and the attachment portion is relative to the plurality of coupling features; the coupling hole passes through the attachment portion along the rotation axis. The combination of the fastener taking-out tool and the fastener withdrawing device as described in item 1 of the application scope, wherein the withdrawing bolt includes: a tapered tapered portion, a threaded rod portion and a driving portion; the tapered tapered portion and The driving portion is opposed to each other across the threaded rod portion; the tapered tapered portion is concentrically connected to one end of the threaded rod portion; the driving portion is concentrically connected to the other end of the threaded rod portion. The combination of the fastener taking-out tool and the fastener withdrawing device as described in item 6 of the application scope, wherein the threaded rod portion is combined with the threaded opening; the tapered tapered portion is located adjacent to the plurality of coupling features; The driving part is located away from the torsion tool body.

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