CN112714682B - Combination of fastener extraction tool and fastener ejection device - Google Patents

Abstract

A fastener-extracting tool and fastener-ejecting device combination comprising: a torque tool body, a threaded opening, a plurality of engagement features, and an extraction bolt. A plurality of engagement features are distributed about a rotational axis of the torque tool body and are capable of biting into the sides of the wear fastener head. A plurality of engagement features are attached about a base of the torque tool body and form a socket-like configuration for removing worn fasteners. A threaded opening passes through the base portion to allow the draw bolt to be threaded into the threaded opening from a direction relative to the plurality of engagement features. When the worn fastener is jammed within the plurality of engagement features, the ejector bolt may be threaded into the space between the plurality of engagement features and eject the worn fastener from the torque tool body.

Description

Combination of fastener extraction tool and fastener ejection device

technical field

This invention relates to tools of various designs for extracting or removing fasteners, such as bolts and nuts. In particular, the present invention relates to a combination of a fastener extracting tool and a fastener ejecting device, wherein the fastener extracting tool can remove a damaged fastener without slipping between the fastener and the damaged fastener, and the fastener ejecting device can be removed from the Extract broken fasteners from the fastener extraction tool.

Background technique

Hex bolts, nuts, screws, and other similar threaded devices are used to securely join multiple workpieces together by engaging complementary threads, such as male or female threads. These types of fasteners are generally constructed with 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 a hole or nut to hold the fastener and hold the workpiece together. The head of the fastener receives an external torque. The head of the fastener is the means used to rotate or drive the fastener into the female thread. The head of the fastener is specially shaped to allow an external tool, such as a wrench, to apply torque to the fastener, allowing the fastener to engage to some degree with the female thread. These fasteners are simple, cheap and effective, so they are commonly used in modern industry. One of the most common problems with these fasteners is that the external tool, such as a wrench, can slip on the head, whether it is a male or female fastener. This problem often occurs due to: worn fasteners or tools, corrosion, overtightening, or broken fastener heads. There are various known methods for removing fasteners, some of which are more invasive. Once the head of the fastener is damaged, more invasive methods must be used to remove the clipped fastener. In this case, using an electric drill to dig out the fastener is a method that some users often use to remove the fastener. While this method does work in some cases, it carries a high risk of damaging the internal threads of the screw hole.

Contents of the invention

The present invention provides a combination of a fastener taking out tool and a fastener ejecting device, which can reliably eliminate the possibility of slipping between the fastener and the removal tool. The present invention uses a series of bonded keyway structures to engage the head of the fastener and effectively transfer torque between the fastener removal tool and the head of the fastener. The present invention also solves common problems of conventional bolt extraction tools, such as the problem of the fastener head or the fastener itself attaching or sticking to the fastener extraction tool. Furthermore, the present invention allows the user to easily eject residual material or removed fasteners from the fastener extraction tool using a fastener ejection device.

In one embodiment, the combination of the fastener extraction tool and the fastener ejection device of the present invention includes: a torque tool body, an opening with threads, a plurality of coupling features, and an ejection bolt, wherein the plurality of coupling features are distributed in the torque around a rotational axis of the tool body; a plurality of coupling features and connected to around a base of the torque tool body; a threaded opening passes through the base; an exit bolt can be threaded into the threaded opening and relative to the plurality of coupling features.

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

In one embodiment, the withdrawal bolt of the present invention comprises: a tapered taper, a threaded shank, and a drive portion; wherein the tapered taper and the drive face each other across the threaded shank; the tapered taper The constriction part is concentrically connected to one end of the threaded rod part; the driving part is concentrically connected to the other end of the threaded rod part.

When using the present invention to remove a damaged/worn fastener, the user places the torque tool body around the damaged/worn fastener so that the plurality of engagement features surround the damaged/frayed fastener with a considerable length around the fastener, then apply a counterclockwise torque to the torque tool body to rotate and remove the damaged/worn fastener.

When a broken/worn fastener needs to be withdrawn from the engagement features, the user engages the threaded shank with the threaded opening, leaving the tapered taper within the engagement features. The user then applies appropriate clockwise or counterclockwise torque to the exit bolt via the drive portion and converts the rotational force to a linear force until the broken/frayed fastener is released from the engagement features.

Description of drawings

Figure 1 is a perspective view showing a torque tool body, engagement features, and an exit bolt according to one embodiment of the present invention.

Figure 2 is a top view showing the underside of a torque tool body and an attachment assembly according to one embodiment of the present invention.

FIG. 3 is a top view showing a torque tool body and coupling features according to one embodiment of the present invention, details of which are shown in FIG. 4 .

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

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

FIG. 6 is a sectional view showing a cross section of the torque tool body taken along line AA of FIG. 5 .

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

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

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

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

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

12 is a top view showing a torque tool body and coupling features according to a second alternative embodiment of the present invention.

[Description of main component symbols]

1 Torque tool body

2 axes of rotation

3 base

31 Bottom surface of attachment part

32 Top surface of torque tool body

4 Threaded opening

5 Combining features

6 First slope zone

7 bend

8 Second slope zone

81 near area

82 Far Zone.

Detailed ways

First of all, it should be specifically stated 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 taking out a fastener and accessories for the fastener taking out tool. The invention discloses a combination of a fastener taking out tool and a fastener withdrawing device. Removing broken or worn fasteners from fastener extraction tools is a difficult job. The present invention solves this problem by disclosing an ejection device which is selectively combined with a removal tool. This ejection device is specifically designed to assist the user in removing any broken or worn fasteners that have been gripped by the fastener removal tool. Furthermore, the present invention is compatible with the male component of the fastener. Fasteners using male components, also known as male fasteners, use the outer side of the fastener head as the engagement location for locking or loosening tools, such as hexagon bolts and nuts. An example of a male fastener is a bolt with a hex 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 present invention comprises: a torque tool body 1 , a threaded opening 4 , a plurality of coupling features 5 , and an exit bolt 12 . The torque tool body 1 exerts relevant forces 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 sized to enclose the male fastener in an interlocking manner, like a known wrench socket. The length, width, and diameter of the torque tool body 1 can be designed to match male fasteners of various sizes. A plurality of coupling features 5 can prevent the fastener from sliding when the fastener is taken out, and they are distributed around a rotation axis 2 of the torque tool body 1 , as shown in FIG. 3 . Furthermore, a plurality of engagement 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 slippage between the torque tool body 1 and the fastener head, the plurality of coupling features 5 can transmit torque to the male fastener. A threaded opening 4 passes through the base 3 as an attachment feature for the exit bolt 12 . Furthermore, the exit bolt 12 is screwed into the threaded opening 4 and relative to the engagement features 5 . Thus, when the damaged/worn fastener is removed and plugs the coupling features 5, the ejection bolt 12 can push or withdraw the damaged/worn fastener from the coupling features 5.

Please refer to Figure 1 to Figure 3. The torque tool body 1 extends outwardly from a plurality of engagement features 5 . This results in a socket-like configuration in which a plurality of engagement features 5 are distributed on the inner surface of the torque tool body 1 around the axis of rotation 2, like a conventional wrench socket. Furthermore, a wrench handle can be connected to the outer side of the torque tool body 1 through a wrench handle attachment portion. With respect to both the wrench socket and the wrench handle attachment, each of the plurality of engaging features 5 extends a certain length along the torque tool body 1 , thus defining an inner space in the torque tool body 1 . This inner 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.

Traditional socket wrenches transmit most of the torque 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 torque transfer from the socket wrench to the fastener head and leads to the phenomenon of slippage. The present invention solves the above problems by transferring the torque transfer point to the side of the fastener head. This is achieved by using a plurality of binding features 5 . Each of the plurality of engagement features 5 is positioned to engage or bite the sides of the fastener head, rather than the side corners. This way, just the right amount of torque can be transferred to the fastener head, causing the fastener to rotate and eventually remove the damaged/worn fastener.

Please refer to Figure 3 to Figure 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 bent portion 7 ; the second inclined area 8 is connected to the other end of the bent portion 7 ; the first inclined area 6 and the second inclined area 8 face each other through the bent portion 7 . Thus, a biting edge is formed between a pair of engagement features 5 or within a engagement feature 5 . This allows the biting edge to cut into the head of the fastener when removing a broken/worn fastener. 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 plane. There is a transition edge between the top surface 32 of the base 3 and the plurality of coupling features 5 , wherein the transition edge is a chamfered edge or a curved edge, and the transition edge faces the threaded opening 4 . In an embodiment of the present invention, the first inclined region 6 and the second inclined region 8 are collinear or concave inward, so that the first inclined region 6 and the second inclined region 8 form an acute angle with respect to the curved portion 7 .

In a preferred embodiment of the present invention, a plurality of coupling features 5 are equidistantly distributed on the torque tool body 1 to form a closed shape as shown in FIG. 3 and FIG. 4 . In the present invention, the lengths of the first inclined region 6, the curved portion 7, and the second inclined region 8 can be changed; the angle between the first inclined region 6, the curved portion 7, and the second inclined region 8 can also be changed to Form a sharp tooth-like structure. In order to plan this closed shape, an arbitrary bonding feature 10 and an adjacent bonding feature 11 are defined within the plurality of bonding features 5 . Any combination feature 10 is any one of a plurality of combination features 5 , and an adjacent combination feature 11 is directly adjacent to any combination feature 10 . More specifically, the first sloped region 6 of any bonding feature 10 is connected to the second sloped region 8 of an adjacent bonding feature 11 at an obtuse angle. In other words, the angle between the adjacent first inclined area 6 and the second inclined area 8 is an obtuse angle, which defines the shape of the biting edge. As noted above, the present invention can be designed to accommodate a variety of fastener head shapes. This can be achieved by varying the number of binding features 5 . The number of engaging features 5 generally corresponds to the number of fastener head sides. For example, a pentagonal fastener head has 5 sides. The user must employ the embodiment of the invention with 5 engagement features 5 to remove a male fastener with 5 side fastener heads. In a preferred embodiment of the present invention, the number of the plurality of binding features 5 can be 18, 12, 6, or 4.

Please refer to Figure 9 to Figure 11. In a first other 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; the second inclined region 8 It further includes a near zone 81 and a far zone 82 . In more detail, the first inclined area 6 is connected to one end of the curved portion 7; one end of the proximal region 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 regions 81 are opposite to each other across the curved portion 7 ; the far region 82 of the second inclined region 8 is connected to the other end of the proximal region 81 of the second inclined region 8 and is opposite to the curved portion 7 . Thus, a biting edge is formed between the proximal region 81 of the second inclined region 8 and the distal region 82 of the second inclined region 8 . This allows the biting edge to cut into the head of the fastener when removing a broken/worn fastener. Moreover, the angle between the proximal region 81 of the second inclined region 8 and the distal region 82 of the second inclined region 8 is an obtuse angle, and thus defines the shape of the biting edge.

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

In some embodiments among the first other embodiments of the present invention, the angle of the first inclined zone 6 and the far zone 82 is equal to the angle of the far zone 82 and the near zone 81, wherein the far zone 82 is along the direction of the fastener head. side surface distribution. Furthermore, the first inclined area 6 , the far area 82 , and the near area 81 define a trapezoidal shape.

Please refer to Figure 12. In the second other 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 . The curved portion 7 further includes: a first zone, a second zone, a third zone, and a fourth zone. More specifically, the first area is adjacent to the second area; the third area is adjacent to the second area and opposite to the first area; the fourth area is adjacent to the third area and opposite to the second area. Therefore, 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 opposite to each other through the curved portion 7 . Moreover, 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, a biting edge is formed at the bent portion 7 . This allows the biting edge to cut into the head of the fastener when removing a broken/worn fastener. Moreover, the first area, the second area, the third area, and the fourth area can be designed as a plurality of straight line areas, a plurality of curved line areas, or a combination of straight line areas and curved line areas.

Moreover, in the second other embodiment of the present invention, a plurality of coupling features 5 are arranged equidistantly on the torque tool body 1 to form a closed shape as shown in FIG. 12 . The lengths of the first inclined zone 6, the curved portion 7, and the second inclined zone 8 can be changed; the angles between the first inclined zone 6, the curved portion 7, and the second inclined zone 8 can also be changed to form sharp teeth shaped structure. In order to plan this closed shape, an arbitrary bonding feature 10 and an adjacent bonding feature 11 are defined within the plurality of bonding features 5 . Any combination feature 10 is any one of a plurality of combination features 5 , and an adjacent combination feature 11 is directly adjacent to any combination feature 10 . More specifically, the first sloped region 6 of any bonding feature 10 is connected to the second sloped region 8 of an adjacent bonding feature 11 at an obtuse angle. In other words, the angle between adjacent first slanted regions 6 and second slanted regions 8 is an obtuse angle, and defines a connection point between a pair of bonding features 5 as an occlusal edge within the curved portion 7 .

In some embodiments of the present invention, the plurality of bonding features 5 may taper from the top surface 32 toward the threaded opening 4, wherein the plurality of bonding features 5 adjacent to the threaded opening 4 have a smaller diameter than adjacent receiving cavities or The diameter of the plurality of bonding features 5 adjacent to 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 damaged/worn fasteners. Please refer to Figure 5 and Figure 6 . The present invention further includes: an attachment portion 16 and a coupling hole 17, which allow 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 axis 2 , and the attachment portions 16 are distributed along the rotation axis 2 so that the rotation axis of the torque tool is aligned with the rotation axis 2 . Furthermore, 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 a preferred embodiment of the present invention, the attachment portion 16 is 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 that of the base 3 . The coupling hole 17 passes through the attachment portion 16 along the rotation shaft 2 . The coupling hole 17 is shaped to accept a male attachment component of a socket wrench. Since most socket wrenches use a square male attachment component, 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 adapt to different torque tools and different attachment means. For example, the shape of the coupling hole 17 may be, but not limited to, a square or a cylinder. In other embodiments of the present invention, the outer surface of the attachment part 16 can be treated with surface grip, 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. A bottom surface 31 of the attachment portion 16 is gradually sloped from the engagement hole 17 so that the plurality of engagement features 5 can be hammered into a broken/worn fastener without damaging the engagement hole 17 . In other words, the height of the attachment portion 16 near the coupling hole 17 is slightly greater 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 exit bolt 12 for exiting a broken/frayed fastener comprises: a conical taper 13 , a threaded shank 14 , and a drive 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 part 13, the threaded rod part 14 and the driving part 15 are arranged coaxially with each other, so that the tapered tapered part 13 is concentrically connected to one end of the threaded rod part 14, and the driving part 15 is concentrically connected to the threaded rod part 14 on the other end. What's more, a hole can be penetrated into the side of the driving part 15, so that a torque applying lever can be combined with the hole, and when the withdrawal bolt 12 is combined with the combination hole 17, the torsion force is applied to the withdrawal bolt 12. This hole can be in any shape, including: circular, 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 cooperate with the receiving thread (female thread) of the threaded opening 4 . When a broken/worn fastener needs to be withdrawn, the threaded shank 14 engages the threaded opening 4 . Thus, the conical taper 13 is located within the plurality of engagement features 5 and the drive portion 15 is located away from the torque tool body 1 . The user can apply an appropriate clockwise or counterclockwise torque to the ejection bolt 12 via the drive portion 15 and convert the rotational force into a linear force until the broken/worn fastener is released from the socket. Due to the location of the tapered tapers 13 within the plurality of engagement features 5, application of a linear force can cause the tapered tapers 13 to contact and push out a broken/worn fastener. In a preferred embodiment of the present invention, the driving part 15 is a hexagonal structure. In other embodiments of the present invention, the driving part 15 can be, but not limited to, a square configuration, a circular configuration, or other configurations which can adapt to different socket wrenches or similar tools for applying rotational force. The tapered taper 13 can be made in a cylindrical configuration, a square configuration, a hexagonal configuration, or other configurations desired by the user/manufacturer. The threaded shank 14 may be of any shape shank configuration, which may be, but is not limited to, a semi-circular configuration, a semi-square configuration, or any other geometric shank configuration that male threads may use.

In order to use the present invention to remove a damaged/worn fastener, the torque tool body 1 is placed around the damaged/worn fastener so that the plurality of coupling features surround the damaged/worn fastener with a considerable length around. The user applies a counterclockwise torque to the torque tool body 1 to rotate and remove the damaged/frayed fastener. When torque is applied to the torque tool body 1, the plurality of coupling features 5 will "bite" into the side of the fastener head, and then rotate the fastener. The present invention is designed to partially or fully incorporate worn fastener heads. Each of the plurality of joining features 5 of the present invention has an engaging edge. With a plurality of combination features 5, the present invention can overcome the problem of the fastener head slipping.

The present 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.

Claims (4)

1. A fastener-extracting tool and fastener-ejecting device combination comprising:

a torque tool body;

an opening having threads;

a plurality of binding features; and

An ejector bolt in which

The plurality of combination features are distributed around a rotation axis of the torque tool body;

the plurality of engagement features are connected around a base of the torque tool body;

the cross-section of each of the plurality of bonding features comprises: a first sloped region, a curved portion, and a second sloped region;

the plurality of bonding features includes: an arbitrary binding feature, and an adjacent binding feature;

the first sloped region of the arbitrary combination feature connects to the second sloped region of the adjacent combination feature at an angle, wherein a bite edge is formed between the arbitrary combination feature and the adjacent combination feature;

the threaded opening passing through the base;

the exit bolt is threaded into the threaded opening and is opposite the plurality of engagement features;

the exit bolt includes: a cylindrical configuration, a threaded shank portion, and a drive portion;

the cylindrical configuration and the drive portion being opposite each other across the threaded shank portion;

the cylindrical formation being concentrically connected to one end of the threaded shank;

the driving part is concentrically connected with the other end of the threaded rod part;

the threaded shank is coupled to the threaded opening;

the cylindrical structure is positioned adjacent to the plurality of bonding features; and

The driving part is located at a position far away from the torque tool body.

2. The combination fastener-extracting tool and fastener-extracting device of claim 1, wherein,

the torque tool body extends outwardly from a cross-section of the plurality of engagement features.

3. The combination fastener-extracting tool and fastener-extracting device of claim 1, wherein,

the first inclined area is connected to one end of the bending part;

the second inclined area is connected with the other end of the bending part; and

The first inclined region and the second inclined region are opposite to each other across the bending portion.

4. The fastener-extracting tool and fastener-ejecting device combination of claim 1, further comprising:

an attachment portion; and

A combining hole in which

The center of the attachment portion is located at the rotation axis, and the attachment portion is distributed along the rotation axis;

the attachment portion is connected to the base portion of the torque tool body and the attachment portion is opposite to the plurality of coupling features; and

The coupling hole passes through the attachment portion along the rotation axis.

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