JP2021534982A - Fastener extractor - Google Patents

Abstract

It is a fastener extractor for removing the stuck fastener, and has a mechanism to assist in removing the fastener from the extractor. This extractor includes a shank body, torque tool body, tubular sleeve, external threads, and internal threads. The torque tool body includes a plurality of side walls and at least one engaging portion. The engaging portion is configured to be integrated into a particular side wall and bite into the anchored fastener. The drive head is terminally and concentrically connected to the shank body to receive an external torque tool. The torque tool body is terminally and concentrically connected to the shank body at a position opposite to the drive head. The tubular sleeve slidably engages along the shank body through internal and external threads to physically disconnect the torque tool body from the fasteners to which it is fastened.

Description

The present invention generally relates to fasteners (fasteners), in particular various tools designed to pull out (remove) bolts and nuts, and more specifically to slips designed to remove damaged fasteners. Various configurations of an extractor with a stop mechanism are disclosed.

Threaded parts (fasteners) such as hexagon bolts, nuts, and screws are used to secure and hold multiple members by engaging complementary screws called female threads. Generally, these types of fasteners consist of an external thread and a cylindrical shaft with a head at one end. The external threads engage with the threads of the complementary female threads tapped on the holes or nuts to secure the fasteners in place and secure the associated members together. The head is a means for receiving a torque force from the outside and turning (driving) the fastener with respect to the female screw. The head is specially shaped so that an external tool such as a wrench can rotate the fastener and apply a reasonable torque to the fastener to engage the complementary female screw. This type of fastener is simple, very effective, inexpensive and widely used in modern construction.

One of the most common problems with using these types of fasteners, whether male or female, is that the external tool slips on the head portion. This is typically caused by wear or corrosion of fasteners or tools, excessive tightening, or damage to the head portion of the fastener. Various methods are used to remove fasteners, some of which are more destructive than others. If the head of the fastener is damaged, more destructive methods need to be taken to remove the stuck fastener. Fastener drilling out is a common method used by some users. This method works well in some scenarios, but there is a high risk of damaging the internal threads of the holes. The present invention provides a fastener extraction (removal) system (extractor) that substantially eliminates the possibility of slipping. This design uses a series of integrated splines that bite into the fastener head, allowing efficient torque transfer between the extraction tool bit and the fastener head portion. Another common problem when using conventional fastener extractors is that some or all of the fasteners remain attached to the extraction tool. According to the present invention, the user can easily remove some or all of the remaining fasteners from the extractor.

It is a perspective view of the present invention. It is a perspective view of the open state of this invention. It is an enlarged view of the torque tool main body which concerns on this invention. It is a top view of the shank main body, the drive head, and the torque tool main body of this invention. It is a perspective view of the shank main body, the drive head, and the torque tool main body of the alternative embodiment of this invention. It is a top view of the shank main body, the drive head, and the torque tool main body of the alternative embodiment of this invention. It is a perspective view of the shank main body, the drive head, and the torque tool main body of the alternative embodiment of this invention. It is a perspective view of the alternative embodiment of the present invention.

All drawings are intended to illustrate particular aspects of the invention of the present application and are not intended to limit the scope of the invention of the present application.

The present invention broadly discloses various extractor bits, including extractors (screw extraction tools) and their accessories, and more specifically, both male and female embodiments. It can be difficult to remove damaged fasteners from the extractor. The present invention aims to solve this problem by providing a release sleeve built into the extractor, and in particular assists the user in removing broken fastener fragments left on the extractor. It is designed to be.

As shown in FIGS. 1 and 2, the extractor according to the present invention includes a shank body (1), a drive head (2), a torque tool body (3), an external thread (15), a tubular sleeve (16), and the like. Includes internal threads (17) and nuts (18). The shank body (1) and drive head (2) allow the extractor according to the present invention to be attached to an external torque tool, thereby pulling out via the torque tool body (3) as in conventional designs. Because of this, it is possible to apply torque force to the socket fastener. External torque tools include, but are not limited to, electric drills, torque wrenches, pneumatic drills, socket screwdrivers, and other similar torque tools. The drive head (2) functions as a component for engaging with an external torque tool. Specifically, the drive head (2) is a nut-shaped element and is terminally and concentrically connected to the shank body (1). The preferred horizontal cross section of the drive head (2) is a hexagonal profile, but other shapes may be used. For example, in one embodiment, the drive head (2) has a square horizontal cross section. In another embodiment, the bottom of the drive head (2) is dome-shaped. Specifically, the bottom portion is a part of the drive head (2) located at a position facing the shank main body (1) across the drive head (2). With such a dome shape, a striking surface on which an impact force for inserting the torque tool body (3) into an object forcibly pulled out is formed. This striking surface is not limited to the dome shape.

The torque tool body (3) is a shank-shaped member for applying torque to remove the fixed fastener, and is a fixed socket screw, a socket fastener such as a socket bolt, a broken stud, or any screw. The mountain engages in a particular size perforated hole in the cut shank. The torque tool body (3) is arranged along the shank body (1) so as to face the drive head (2). As shown in FIG. 3, the torque tool body (3) has a plurality of side walls (4), at least one engaging portion (8), a first base (13), and a second base (14). include. Broadly speaking, the torque tool body (3) is a tough metal prism that is terminally and concentrically connected to the shank body (1). Each of the plurality of sidewalls (4) engages within the socket fastener and grips the socket fastener in order to efficiently transmit the torque force of the external torque tool to the socket fastener. The plurality of side walls (4) are arranged radially with respect to the axis of rotation (12) of the torque tool body (3) to fit the geometry of the socket fastener. The number in the plurality of sidewalls (4) may be modified to fit various socket fastener shapes and cross sections. In one embodiment of the present invention, the number of plurality of side walls (4) is 6, resulting in a hexagonal geometric cross section of the torque tool body (3). In another embodiment of the present invention, the number of plurality of sidewalls (4) is 4, and the resulting torque tool body (3) has a square geometric cross section.

The first base (13) and the second base (14) are arranged so as to face each other along a plurality of side walls (4). Here, the shank main body (1) is connected to a position adjacent to the second base portion (14) and facing the first base portion (13). Further, the first base (13) and the second base (14) are oriented perpendicular to each of the plurality of side walls (4), whereby the polygonal shape of the torque tool body (3). To configure. More specifically, it is preferred that the first base (13) consists of a flat surface and is oriented perpendicular to each of the plurality of side walls (4). Further, it is preferable that the lateral end portion between the first base portion (13) and each of the plurality of side walls (4) is chamfered. Further, the first base (13) may be formed in a conical shape so as to provide a bite point similar to a punching tool. When an impact force is applied to the drive head (2), the engaging portion (8) is designed to cut into the side wall of the object to be removed. The engaging portion (8) increases the frictional and connecting forces between the plurality of side strikes (4) and the socket / fastener to prevent mutual slippage. In this way, the engaging portion (8) is integrated with a specific side wall among the plurality of side walls (4). Here, the specific side wall refers to any one of the plurality of side walls (4).

The tubular sleeve (16) is an elongated tubular structure having an inner diameter complementary to the outer diameter of the shank body (1). Tubular sleeves (16), internal threads (17), external threads (15), and nuts (18) to remove any extra material or socket fasteners from the torque tool body (3). Functions as a retaining mechanism. The preferred tubular sleeve (16) design involves stepping up the diameter along the tubular sleeve (16) at the first end of the tubular sleeve (16) (where the first end of the tubular sleeve is torque). (Placed adjacent to the tool body (3)). This provides an additional engagement surface between the tubular sleeve (16) and the foreign material adhering to the torque tool body (3). Generally, the tubular sleeve (16) translates along the shank body (1) to apply pressure to the socket fastener on the torque tool body (3) until the socket fastener (foreign matter) is dislodged. Specifically, the external thread (15) extends along the shank body (1) between the torque tool body (3) and the drive head (2). Further, the external thread (15) is laterally cut into the shank body (1). The internal thread (17) is designed to complement the external thread (15). The internal thread (17) is located within the tubular sleeve (16) and extends along the tubular sleeve (16). In addition, the internal thread (17) is cut laterally within the tubular sleeve (16). During operation, the shank body (1) is concentrically placed within the tubular sleeve (16) with the internal threads (17) mechanically engaged with the external threads (15). This allows the tubular sleeve (16) to slide along the shank body (1) as the shank body (1) and tubular sleeve (16) rotate relative to each other. After removing the seized socket fastener using the torque tool body (3), the user may need to remove the socket fastener from the torque tool body (3). To do this, the user ties the tubular sleeve (16) to the shank body (1) and rotates it until the tubular sleeve (16) is pressed against the socket fastener and the socket fastener comes off. All you have to do is slide it toward the torque tool body (3). The rotation of the tubular sleeve (16) may be done manually by the user, but if more force is required, two external torque tools such as a wrench may be used. One wrench is mechanically engaged to the shank body (1) via the drive head (2) and the other wrench is mechanically engaged to the tubular sleeve (16) via the nut (18). Wrench. To this end, the nut (18) is terminally and concentrically connected to the tubular sleeve (16). Like the tubular sleeve (16), the shank body (1) is also located inside the nut (18). The preferred shape of the nut (18) is hexagonal, but alternative shapes may also be used. The size, length, and material of the tubular sleeve (16) and nut (18) may be changed according to the needs and preferences of the user.

As shown in FIGS. 3 and 4, in one embodiment of the present invention, the engaging portion (8) is an engaging cavity. For reference, each of the plurality of side walls (4) comprises a first side wall edge (5), a second side wall edge (6), and a brace surface (7). The brace surface (7) physically presses the socket fastener (more specifically, against the lateral side wall of the head portion of the socket fastener). The first side wall edge portion (5) and the second side wall edge portion (6) are arranged so as to face each other with the brace surface (7) interposed therebetween. When viewed from either above or below, the first side wall edge (5) and the second side wall edge (6) of each of the plurality of side walls (4) are the corners of the torque tool body (3). To configure. The engaging cavity penetrates into the brace surface (7) of a particular sidewall along the normal and forms an additional gripping point (teeth) on the brace surface (7). The grip point is formed by the engaging cavity and the brace surface (7). In one embodiment of the present invention, the engagement cavity extends in the torque tool body (3) from the first base (13) to the second base (14). This extends the additional grip point along the length of the torque tool body (3), ensuring maximum grip engagement. In another embodiment of the invention, as shown in FIG. 3, the engaging cavity is tapered from the first base (13) to the second base (14). To further ensure maximum grip engagement, it is preferred that the entire cross section (9) of the engagement cavity be oriented parallel to the first base (13) and the second base (14).

In one embodiment of the invention, the cross section (9) of the engaging cavity is a partial circular profile as a whole, from the first side wall edge (5) of the particular side wall to the second side edge of the particular side wall. It is concave with respect to the straight line connecting the parts (6). The partial circular profile ensures that the torque tool body (3) has few high stress points and increases the overall life of the tool. In another embodiment of the invention, the entire cross section (9) of the engaging cavity is a triangular profile, which is the second side of the particular side wall from the first side wall edge (5) of the particular side wall. It is concave with respect to the straight line connecting the edges (6). A semi-square profile, a semi-rectangular profile, a semi-elliptical profile, and the like may be used for the engaging cavity. The inner corners of the triangular, square, and half-square profiles are preferably rounded to add strength.

As shown in FIG. 4, in one embodiment of the present invention, the entire cross section (9) of the engaging cavity is composed of a curved portion (10) and a straight portion (11). The resulting grip points have a unique shape to form sharp engaging teeth that bite into the corners of the socket fastener, allowing material from the inner side of the fastener socket to be taken into the engaging cavity. The result is a higher grip than conventional tools designed to simply push the material away. This is especially true for worn or damaged fastener sockets. The curved portion (10) is a partially circular curved shape arranged adjacent to the first side wall edge portion (5) of a specific side wall. The straight portion is arranged adjacent to the curved portion (10) and facing the first side wall edge portion (5) of the specific side wall. The straight portion (11) guides a portion of the socket fastener to be pressed against the formed engaging teeth. Therefore, the straight portion (11) extends from the curved portion (10) to the second lateral edge portion (6) of the specific side wall. Specifically, the straight portion (11) begins at the curved portion (10) and ends at the second lateral edge portion (6) of the particular side wall. This embodiment may be implemented in a clockwise configuration, or may be implemented in a counterclockwise configuration by reversing the positional relationship between the curved portion (10) and the straight portion (11).

In another embodiment of the invention, the engaging cavity is centrally located on the brace plane (7) of a particular sidewall. In particular, the engagement cavities are arranged offset by a first distance from the first side wall edge (5) of the particular side wall and offset by a second distance from the particular second side wall edge (6). (Here, the first distance is equal to the second distance). In an alternative embodiment, the first distance does not have to be equal to the second distance. This positions the engagement cavity to engage with the inner sidewall of the socket fastener for the least likely slippage and most efficient torque transfer. Further, this embodiment may be used to rotate the socket fastener clockwise or counterclockwise.

As shown in FIGS. 5, 6 and 7, in one embodiment of the present invention, the engaging portion (8) is an engaging projection. The engagement projection is a member protruding from the torque tool body (3) that forms an additional grip element for a particular sidewall. Specifically, the engagement projection is provided on the side of the brace surface (7) of the specific side wall. In addition, the engagement projections are from the first base (13) to the second base (14) to ensure that the additional grip portion extends along the entire length of the torque tool body (3). It is extended. This allows the socket fastener to be engaged deeper and maximizes the torque applied to the socket fastener. Further, the engaging protrusions are provided on the first side wall edge portion (5) of the specific side wall and the second side wall edge portion of the specific side wall so that the tool according to the present embodiment can be used both clockwise and counterclockwise. It is preferably placed in the center between 6) and. To ensure a consistent grip along the torque tool body (3), the entire cross section (19) of the engaging projection is parallel to the first base (13) and the second base (14).

As shown in FIG. 6, in one embodiment of the present invention, the entire cross section (19) of the engaging projection is a profile of a partial circle. Specifically, the profile of the partial circle of the engagement projection is convex with respect to the straight line connecting the first side wall edge (5) of the specific side wall to the second side wall edge (6) of the specific side wall. Is. This embodiment is particularly useful for socket fasteners that are significantly worn and peeled off because the tool receiving cavity of the socket fastener is enlarged. The engaging projections protrude from the brace surface (7) of a particular side wall and press against the worn side of the socket fastener to engage.

As shown in FIGS. 4 and 6, preferred embodiments of the present invention include a plurality of engaging portions (8). In this case, as shown in FIG. 3, each of the plurality of engaging portions (8) is arranged radially with respect to the rotation axis (12) in a state of being integrated with the plurality of side walls (4). .. This configuration provides an additional grip function on each of the plurality of sidewalls, ensuring that an effective grip force is generated between the tool and the socket fastener according to the present invention.

As shown in FIG. 7, in one embodiment of the present invention, the torque tool body (3) is tapered from the second base portion (14) toward the first base portion (13). This allows the invention of the present application to be used for socket fasteners of different sizes. The degree of taper may be changed according to the needs and preferences of the user. In one embodiment of the present invention, the torque tool body (3) may be connected to various instruments such as, but not limited to, impact tools, hydraulic screws, wrench sockets, and screwdrivers.

As shown in FIG. 8, the invention of the present application is implemented in a double-ended configuration in one embodiment. In this embodiment, at least one shank body (1) comprises a first shank body (22) and a second shank body (23), and at least one torque tool body (3) is a first. It consists of a torque tool body (24) and a second torque tool body (25), and at least one external thread (15) is a first external thread (26) and a second external thread (27). It consists of. This embodiment provides a double-sided version for the present invention. Here, each side of both sides can be designed or oriented differently to increase diversity. Specifically, the invention of the present application can be used for clockwise rotation and counterclockwise rotation. The first shank main body (22) and the second shank main body (23) are arranged so as to face each other with the drive head (2) interposed therebetween. The first torque tool body (24) faces the drive head (2) and is terminally and concentrically connected to the first shank body (22). The first external thread (26) extends along the first shank body (22) between the first torque tool body (24) and the drive head (2), and further, the first. The external thread (26) is laterally connected to the first shank body (22). This constitutes a single engaging surface of the present invention. To make this a mirror image, the second torque tool body (25) is terminally and concentrically connected to the second shank body (23) opposite to the drive head (2). The second external thread (27) extends along the second shank body (23) between the second torque tool body (25) and the drive head (2). Further, the second external thread (27) is laterally connected to the second shank body (23). In this embodiment, in order to provide a 2-in-1 type tool, the type of the engaging portion of the first torque tool main body may be different from the type of the engaging portion of the second torque tool main body.

Although the invention of the present application has been described in the context of its preferred embodiment, many other possible modifications and variations are possible without departing from the spirit and scope of the invention claimed in the claims. Please understand that.

Claims (13)

With at least one shank body,
With the drive head,
With at least one torque tool body,
Including at least one external thread
The torque tool body includes a plurality of side walls and at least one engaging portion.
The plurality of side walls are arranged radially with respect to the rotation axis of the torque tool main body.
The engaging portion is integrated into a specific side wall among the plurality of side walls.
The drive head is terminally and concentrically connected to the shank body.
The torque tool main body is arranged on the opposite side of the drive head along the shank main body.
The torque tool body is terminally and concentrically connected to the shank body.
The external thread extends between the torque tool body and the drive head along the shank body.
The external screw thread is a fastener extractor connected to the side surface of the shank body. In addition, with a tubular sleeve,
Including internal threads
The internal threads are located within the tubular sleeve.
The internal thread extends along the tubular sleeve and
The internal thread is cut relative to the tubular sleeve.
The shank body is concentrically located within the tubular sleeve and the internal threads engage the external threads.
The fastener extractor according to claim 1. In addition, including nuts,
The nut is terminally and concentrically connected to the tubular sleeve.
The shank body is located inside the nut,
The fastener extractor according to claim 2. In addition, it includes multiple engaging parts,
The plurality of engaging portions are composed of, and are arranged radially with respect to the rotation axis of the torque tool main body.
Each of the plurality of engaging portions is integrated into the corresponding side wall of the plurality of side walls.
The fastener extractor according to claim 1. The engaging portion is an engaging cavity.
The torque tool body further includes a first base and a second base.
Each of the plurality of side walls includes a first side wall edge portion, a second side wall edge portion, and a brace surface.
The first side wall edge portion and the second side wall edge portion are arranged so as to face each other with the brace surface interposed therebetween.
The shank body is connected adjacent to the second base on the opposite side of the first base.
The engaging cavity has a shape that bites into the brace surface of the specific side wall.
The fastener extractor according to claim 1. The entire cross section of the engaging cavity is parallel to the first base and the second base.
The fastener extractor according to claim 5. The entire cross section of the engaging cavity is composed of a curved portion and a straight portion.
The curved portion is arranged adjacent to the first side wall edge portion of the specific side wall, and the straight line portion is adjacent to the curved portion and the first side wall edge portion of the specific side wall. Located facing the,
The straight portion extends from the curved portion to the second side wall edge portion of the specific side wall.
The fastener extractor according to claim 5. The engaging portion is the engaging protrusion.
The torque tool body further includes a first base and a second base.
Each of the plurality of side walls includes a first side wall edge, a second side wall edge, and a brace surface.
The first side wall edge portion and the second side wall edge portion of the specific side wall are arranged so as to face each other with the brace surface interposed therebetween.
The shank body is connected to the opposite side of the first base and adjacent to the second base.
The engaging projections are laterally connected to the brace surface of the particular side wall.
The engaging protrusion extends from the first base toward the second base.
The engaging projection is centrally located between the first side edge of the particular side wall and the second side edge of the particular side wall.
The fastener extractor according to claim 1. The entire cross section of the engaging projection is parallel to the first base and the second base.
The fastener extractor according to claim 8. The entire cross section of the engaging projection is a profile of a partial circle.
The profile of the partial circle is convex with respect to the line connecting the first side edge of the particular side wall to the second side edge of the particular side wall.
The fastener extractor according to claim 8. The torque tool body further includes a first base and a second base.
The shank body is connected adjacent to the second base at a position opposite to the first base.
The torque tool body is tapered from the second base toward the first base.
The fastener extractor according to claim 1. A lateral end between the first base and each of the plurality of sidewalls is chamfered.
The fastener extractor according to claim 5. The at least one shank body includes a first shank body and a second shank body.
The at least one torque tool main body includes a first torque tool main body and a second torque tool main body.
The at least one external thread includes a first external thread and a second external thread.
The first shank main body and the second shank main body are arranged so as to face each other with the drive head interposed therebetween.
The first torque tool main body is terminally and concentrically connected to the first shank main body on the opposite side to the drive head.
The first thread extends along the first shank body between the first torque tool body and the drive head.
The first external thread is connected to the side surface of the first shank body.
The second torque tool main body is terminally and concentrically connected to the second shank main body on the side opposite to the drive head.
The second external thread extends along the second shank body between the second torque tool body and the drive head.
The second external screw is connected laterally to the side surface of the second shank body.
The fastener extractor according to claim 1.

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