Drill bit torsional shear screw assembly

Abstract

The invention relates to the technical field of screws, one embodiment of the invention provides a drill bit torsional shear screw assembly, a drill bit is arranged on a screw body and located at the other end of a hexagonal head part, and the drill bit is used for forming a through hole in a to-be-installed part, so that the screw body penetrates through the through hole and is connected with the to-be-installed part; the drill bit and the screw body are connected through the connecting part, the outer diameter of the connecting part is smaller than that of the screw body and smaller than that of the drill bit, after the bolt body penetrates through a to-be-installed piece, the drill bit is twisted and cut off, and then the nut is in threaded connection with the screw body and used for being matched with the screw body to lock the to-be-installed piece. According to the technical scheme, the two steps of drilling and screw mounting are combined into a whole, after the drill bit punches holes, the drill bit part is subjected to torsional shear and removed, cooperative use of the bolt body and the nut is not affected, the mounting period is greatly shortened, the labor intensity of constructors is reduced, and the tool replacement frequency is reduced. And meanwhile, the nut is matched with the screw body for locking, and the scene with the high requirement for connecting strength can be met.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the technical field of screws, and in particular, to a drill torsion shear screw assembly. Background Art

[0002] In various fields such as mechanical installation, construction, and furniture manufacturing, screw connection is a common fixing method, mainly for the installation of panels. In the traditional screw installation process, it is usually necessary to use a drilling tool to drill a through hole on the part to be installed, and then pass the screw through the through hole, and use a nut to fix the part to be installed, but this method has many problems in actual use. On the one hand, the drilling and screw installation operations are independent of each other, which not only prolongs the installation cycle, but also increases the labor intensity of construction personnel. Due to the need to frequently replace drilling tools and screw installation tools, workers are usually required to carry multiple tools such as drilling tools and installation tools before installation, and the operation is cumbersome. On the other hand, when drilling, it is difficult to accurately control the size of the drill hole, and the drill hole is often too large or too small. If the drill hole is too large, there will be a gap between the screw and the part to be installed, reducing the stability of the connection; if the drill hole is too small, it may cause the screw to fail to pass smoothly, or even damage the part to be installed. For example, self-tapping screws can also be drilled directly on the part to be installed, which simplifies the installation steps to a certain extent. However, self-tapping screws cannot be installed with nuts for further tightening, and have limitations in hardness and applicability, and cannot meet scenarios with high requirements for connection strength. Summary of the invention To overcome the above-mentioned defects, an embodiment of the present disclosure provides a drill bit torsion shear screw assembly, which solves the technical problems in the prior art that workers usually need to carry multiple tools such as drilling tools and installation tools before installation, the operation is cumbersome and the drilled holes may not meet the requirements.

[0003] According to one aspect, at least one embodiment of the present disclosure provides a drill bit shear screw assembly, comprising: Screw body; a drill bit, arranged on the screw body and located at an end away from the hexagonal head, the drill bit is used to open a through hole on the part to be installed so that the screw body passes through the through hole and is connected to the part to be installed, the drill bit and the screw body are connected by a connecting portion, and the outer diameter of the connecting portion is smaller than the outer diameter of the screw body and smaller than the outer diameter of the drill bit; The nut is threadedly connected to the screw body and is used to cooperate with the screw body to lock the part to be installed.

[0004] Optionally, the connecting portion is fixedly connected to the screw body, the screw body, the drill bit and the connecting portion are an integral structure, and the connecting portion can be twisted and sheared to separate the screw body and the drill bit.

[0005] Optionally, the drill bit is divided into a pointed cone section, a transition section and a reaming section from top to bottom, the maximum diameter of the reaming section is larger than the diameter of the pointed cone section and the diameter of the transition section, and the diameter of the reaming section is larger than the diameter of the screw body.

[0006] Optionally, a groove is formed between the screw body, the connecting portion and the drill bit, and the groove is used to accommodate a tool for twisting and shearing the connecting portion.

[0007] Optionally, the pointed cone section has a plurality of chip removal grooves.

[0008] Optionally, the screw body has an anti-slip portion, and the anti-slip portion is located on the end surface of the hexagonal head on a side close to the drill bit.

[0009] Optionally, a plug hole is provided on the end surface of the screw body away from the hexagonal head, and the connecting portion is plug-fitted into the plug hole.

[0010] Optionally, the connecting part is a rod body, a key groove is provided on the outer wall of the connecting part along the axial direction of the connecting part, and the inner wall of the plug-in hole has a protrusion, which is engaged with the key groove.

[0011] Optionally, an abutment block is provided on the inner wall of the plug hole, and the abutment block is used to clamp the outer wall of the connecting part entering the plug hole.

[0012] The beneficial effects of the embodiments of the present disclosure are: In the present disclosure, the drill bit is aligned with the surface of the part to be installed, and the hexagonal head is rotated with an electric tool, and the drill bit is used to perform a drilling operation; after the through hole is drilled, the bolt body is continued to be rotated until the screw body passes through the through hole and the hexagonal head abuts against the surface of the part to be installed; then, the drill bit is twisted off, and a nut is screwed on the protruding part of the screw body, and the part to be installed is tightly locked by the threaded fit of the nut and the screw body. The two steps of drilling and screw installation are combined into one, which greatly shortens the installation cycle, reduces the labor intensity of construction workers, and reduces the frequency of tool replacement. At the same time, the nut is locked in conjunction with the screw body to meet the scenario with high requirements for connection strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some exemplary embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the contents of the exemplary embodiments of the present disclosure and these drawings without creative work.

[0014] Figure 1This is a schematic diagram of the structure of a torsion shear screw in one embodiment of the present disclosure; Figure 2 for Figure 1 A schematic diagram of the structure of the connection between the bolt body and the nut in the embodiment; Figure 3 for Figure 1 A schematic diagram of the structure of the bolt body and the drill bit in the embodiment of FIG. Figure 4 It is a structural schematic diagram of a plug hole in another embodiment of the present disclosure; Figure 5 for Figure 4 A schematic diagram of the structure of a torsion shear screw in an embodiment of the invention; Figure 6 for Figure 4 Schematic diagram of the structure of the drill bit in the embodiment of the present invention.

[0015] In the figure: 1. screw body, 101. plug-in hole, 2. drill bit, 201. taper section, 2011. chip groove, 202. transition section, 203. reaming section, 3. hexagonal head, 301. anti-slip portion, 4. connecting portion, 401. groove, 5. nut, 6. protrusion, 7. abutment block, 8. rod body, 801. keyway. DETAILED DESCRIPTION The present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure.

[0016] In order to simplify the drawings, only the parts related to the disclosure are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0017] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0018] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0019] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.

[0020] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0021] like Figure 1~Figure 3 As shown, it shows a drill bit torsion shear screw assembly in one embodiment of the present disclosure, comprising a screw body 1, a drill bit 2 and a nut 5. The drill bit 2 is located at the end of the screw body 1 away from the hexagonal head 3, and the two are connected by a connecting portion 4 with a smaller outer diameter. The screw body 1 is used to penetrate the part to be installed and to be fixed with the nut 5, the drill bit 2 is responsible for drilling, and then the drill bit 2 is torsionally sheared off, and the nut 5 is installed on the bolt body, and the nut 5 has a locking effect on the screw body 1.

[0022] For example, Figure 1 As shown, align the drill bit 2 with the surface of the part to be installed, use an electric tool to rotate the hexagonal head 3, and use the drill bit 2 to perform the drilling operation; after the through hole is drilled, continue to rotate the bolt body 1 until the screw body 1 passes through the through hole and the hexagonal head 3 abuts against the surface of the part to be installed; then, twist and cut off the drill bit 2, screw the nut 5 on the protruding part of the screw body 1, and tightly lock the part to be installed by matching the thread of the nut 5 with the screw body 1. The two steps of drilling 2 and installing the screw body 1 are combined into one, which greatly shortens the installation cycle, reduces the labor intensity of construction workers, and reduces the frequency of tool replacement. At the same time, the nut is locked in conjunction with the screw body to meet the scenarios with high requirements for connection strength.

[0023] In some examples, the connecting portion 4 is fixedly connected to the screw body 1, the screw body 1, the drill bit 2 and the connecting portion 4 are an integrally formed structure, the materials of the screw body 1, the drill bit 2 and the connecting portion 4 are also the same, and the connecting portion 4 can be twisted and sheared to separate the drill bit 2 from the screw body 1 to avoid interference of the drill bit 2 in subsequent use.

[0024] For example, Figure 1 As shown, after completing the drilling and screw installation steps, use a torsion shear tool to clamp the connection part 4, and apply torque to cause torsion shear damage to the connection part 4, thereby separating the screw body 1 and the drill bit 2. It should be noted that the diameter of the hole expansion section of the drill bit 2 is larger than the diameter of the screw body 1. Therefore, the nut 5 can only be installed after the drill bit 2 is torsion sheared, otherwise the nut 5 cannot be installed on the bolt body 1. The separated drill bit 2 will not affect the connection stability between the screw body and the part to be installed, and at the same time avoid the risk of damage to the drill bit 2 due to collision and other reasons during subsequent use. Moreover, it is also convenient to install the nut 5 after removing the drill bit 2.

[0025] In some examples, the drill bit 2 is divided into a pointed cone section 201, a transition section 202 and a reaming section 203 from top to bottom, the maximum diameter of the reaming section 203 is larger than the diameter of the pointed cone section 201 and the diameter of the transition section 202, and the diameter of the reaming section 203 is larger than the diameter of the screw body 1.

[0026] For example, Figure 2 As shown, the pointed cone section 201 of the drill bit 2 first contacts the surface of the part to be installed to achieve positioning and preliminary drilling, the transition section 202 guides the drilling process, and the reaming section 203 expands the hole to the same diameter as the screw body 1, which can ensure that the drilled hole is compatible with the screw body 1. During the drilling process, the pointed cone section 201 first penetrates the surface of the part to be installed to achieve positioning. As the drill bit 2 rotates, the transition section 202 guides the drilling depth and direction. When the reaming section 203 expands the hole diameter to a diameter slightly larger than the diameter of the screw body 1, it is convenient for the screw body 1 to pass through smoothly, avoiding the unstable connection caused by drilling too large a hole, and preventing the screw from being unable to pass through due to drilling too small a hole, thereby improving the connection quality.

[0027] In some examples, a groove 401 is formed between the screw body 1 , the connecting portion 4 and the drill bit 2 , and the groove 401 is used to accommodate a tool for twisting and shearing the connecting portion 4 .

[0028] For example, Figure 2 As shown, after the screw is installed, the operator inserts the twist shearing tool into the groove 401 to twist the connecting portion 4 to separate the drill bit 2 from the screw body 1. It is convenient for the operator to use the tool to twist the connecting portion 4, thereby improving work efficiency.

[0029] In some examples, the pointed cone section 201 has a plurality of chip flutes 2011 .

[0030] For example, Figure 1 As shown, when the drill bit 2 rotates to drill, the generated debris is discharged through the chip groove 2011, avoiding the accumulation of debris in the drill hole, effectively preventing the accumulation of debris, ensuring smooth drilling, and improving the drilling efficiency and quality.

[0031] In some examples, the screw body 1 has an anti-slip portion 301 , and the anti-slip portion 301 is located on the end surface of the hexagonal head 3 on a side close to the drill bit 2 .

[0032] For example, Figure 1 As shown, in order to prevent the screw from loosening easily, an anti-skid portion 301 is provided on the hexagonal head 3, and the anti-skid portion 301 is a circle of anti-skid teeth provided on the end surface of the hexagonal head 3. When the hexagonal head 3 is tightened, the anti-skid portion 301 increases the friction between the screw assembly and the surface of the mounted part to prevent the screw from loosening. The stability of the screw assembly during use is enhanced, the screw is prevented from loosening due to vibration and other reasons, and the reliability of the connection is improved.

[0033] Embodiment 2: The difference between this embodiment and embodiment 1 is that a plug hole 101 is provided on the end surface of the screw body 1 away from the hexagonal head 3 , and the connecting portion 4 is plugged into and matched with the plug hole 101 .

[0034] For example, Figure 3 As shown, different from the integrated structure of the embodiment, the present embodiment adopts a split structure, in which a plug-in hole 101 is prefabricated on the screw body 1, and then the connecting part 4 of the drill bit 2 is inserted into the plug-in hole 101 of the screw body 1. After ensuring a firm connection, the assembly is used for drilling and installation operations.

[0035] Specifically, when in use, first insert the connection part 4 into the plug hole 101 to complete the assembly of the drill bit 2 and the screw body 1; then perform the drilling and screw installation operations; if the drill bit 2 needs to be replaced, the connection part 4 can be directly pulled out from the plug hole 101. When working at high altitude, there is no need to bring a twisting shear tool, and the same drill bit 2 can be used on several screw bodies 1.

[0036] In some examples, the connecting part 4 is a rod body 8 , a key groove 801 is provided on the outer wall of the connecting part 4 along the axial direction of the connecting part 4 , and a protrusion 6 is provided on the inner wall of the mounting hole, and the protrusion 6 is engaged with the key groove 801 .

[0037] For example, Figure 4As shown, when the connecting part 4 is inserted into the plug hole 101 of the screw body 1, the key slot 801 on the outer wall of the connecting part 4 is engaged with the protrusion 6 on the inner wall of the plug hole 101 to prevent the connecting part 4 from rotating during the drilling process. During assembly, the connecting part 4 is inserted into the plug hole 101 so that the key slot 801 is aligned and engaged with the protrusion 6; during the drilling and installation process, the engagement of the key slot 801 with the protrusion 6 ensures that the connecting part 4 rotates synchronously with the screw body 1. The synchronization of the connecting part 4 and the screw body 1 during the working process is ensured, and the stability of drilling and installation is improved.

[0038] In some examples, an abutment block 7 is disposed on the inner wall of the plug hole 101 , and the abutment block 7 is used to clamp the outer wall of the connecting portion 4 entering the plug hole 101 .

[0039] For example, Figure 4 , Figure 5 and Figure 6 As shown, when the connecting portion 4 is inserted into the plug hole 101, the abutment block 7 clamps the outer wall of the connecting portion 4 to prevent the drill bit 2 and the screw body 1 from falling off, but the operator can pull out the drill bit 2 with force. The tightness of the connection between the drill bit 2 and the screw body 1 is improved to prevent the drill bit 2 and the screw body 1 from loosening when the operator is carrying or drilling.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, which should be included in the scope of the claims of the present disclosure.

Claims

1. A drill bit torsion shear screw assembly, characterized in that: include: Screw body (1); a drill bit (2) arranged on the screw body (1) and located at an end away from the hexagonal head (3); the drill bit (2) is used to open a through hole on the part to be installed so that the screw body (1) passes through the through hole and is connected to the part to be installed; the drill bit (2) and the screw body (1) are connected via a connecting portion (4); the outer diameter of the connecting portion (4) is smaller than the outer diameter of the screw body (1) and smaller than the outer diameter of the drill bit (2); A nut (5) is threadedly connected to the screw body (1) and is used to cooperate with the screw body (1) to lock the part to be installed.

2. A drill bit torsion shear screw assembly according to claim 1, characterized in that: The connecting portion (4) is fixedly connected to the screw body (1); the screw body (1), the drill bit (2) and the connecting portion (4) are an integrated structure; the connecting portion (4) can be twisted and sheared off to separate the screw body (1) and the drill bit (2).

3. A drill bit torsion shear screw assembly according to claim 2, characterized in that: The drill bit (2) is divided into a pointed cone section (201), a transition section (202) and a hole expansion section (203) from top to bottom, the maximum diameter of the hole expansion section (203) being larger than the diameter of the pointed cone section (201) and the diameter of the transition section (202), and the diameter of the hole expansion section (203) being larger than the diameter of the screw body (1).

4. A drill bit torsion shear screw assembly according to claim 2, characterized in that: A groove (401) is formed between the screw body (1), the connecting portion (4) and the drill bit (2), and the groove (401) is used to accommodate a tool for twisting and shearing the connecting portion (4).

5. A drill bit torsion shear screw assembly according to claim 3, characterized in that: The pointed cone section (201) has a plurality of chip removal grooves (2011).

6. A drill bit torsion shear screw assembly according to claim 1, characterized in that: The screw body (1) is provided with an anti-slip portion (301), and the anti-slip portion (301) is located on the end surface of the hexagonal head (3) on a side close to the drill bit (2).

7. A drill bit torsion shear screw assembly according to claim 1, characterized in that: An inserting hole (101) is provided on the end surface of the screw body (1) away from the hexagonal head (3), and the connecting portion (4) is plugged into and matched with the inserting hole (101).

8. A drill bit torsion shear screw assembly according to claim 8, characterized in that: The connecting portion (4) is a rod body (8), a keyway (801) is provided on the outer wall of the connecting portion (4) along the axial direction of the connecting portion (4), and a protrusion (6) is provided on the inner wall of the plug hole (101), and the protrusion (6) is engaged with the keyway (801).

9. A drill bit torsion shear screw assembly according to claim 8, characterized in that: An abutment block (7) is provided on the inner wall of the plug hole (101), and the abutment block (7) is used to clamp the outer wall of the connecting portion (4) entering the plug hole (101).

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