Self drilling screw with front-end drill bit structure

Abstract

The utility model relates to the technical field of self-drilling screws, in particular to a self-drilling screw with a front-end drill bit structure, which comprises a threaded drill bit, the threaded drill bit contracts from one end to the other end, a first threaded block is fixedly connected with the threaded drill bit far away from the contracted end, and a first internal thread is arranged on the inner surface of the first threaded block. The first internal thread is in threaded connection with a first external thread, the first threaded block is separated from the first external thread by rotating the threaded drill bit, after separation, the first threaded block slides to enable the first extension rod to slide, the screw is extended in the sliding process, then the first insertion rod can slide downwards, and the first insertion rod is in inserted connection with the first corresponding insertion hole. The connecting rod and the first threaded block are fixed and limited, then the screw is fixed into the plate, after fixing is completed, the screw is rotated inwards, and in the rotating process, if the length is not enough, the second extending rod can slide outwards in the same mode to achieve the continuous extending effect.

Description

Technical Field

[0001] The utility model relates to the technical field of self - drilling screws, and more specifically, to a self - drilling screw with a front - end drill bit structure. Background Art

[0002] The tail of a self - drilling screw is in the shape of a drill tail or a pointed tail. Without auxiliary processing, it can directly drill holes, tap threads, and lock on the set material or base material, greatly saving construction time. Compared with ordinary screws, it has high toughness pulling force and maintaining force, and will not loosen even after a long time of combination. The operation of drilling, tapping, and locking is completed at one time, and the use is safe and simple. Application: It is a type of screw, mainly used for fixing color steel tiles of steel structures, and can also be used for fixing thin plates of simple buildings. It cannot be used for fixing metal - to - metal connections.

[0003] When drilling screws are used for fixed connection of plates, screws of different lengths need to be selected according to the thickness of different plates. However, when fixing screws of different lengths, different lengths of screws need to be produced. On the one hand, it increases the fixing steps, and on the other hand, it increases the production cost of screws.

[0004] Therefore, an improvement is made, and a self - drilling screw with a front - end drill bit structure is proposed. Summary of the Utility Model

[0005] The purpose of the utility model is to address the problem of the adaptability of screws when fixing different plates.

[0006] To achieve the above - mentioned utility model purpose, the utility model provides a self - drilling screw with a front - end drill bit structure to solve the above problems.

[0007] Specifically, the utility model is as follows:

[0008] It includes a threaded drill bit. The threaded drill bit tapers from one end to the other. A first threaded block is fixedly connected to the end of the threaded drill bit away from the tapered end. An internal thread is provided on the inner surface of the first threaded block. An external thread is threadedly connected to the internal thread. A first extension rod is slidably connected to the side of the external thread close to the first threaded block. A number of first insertion holes are provided on the upper surface of the first extension rod, and a first insertion rod is inserted into any one of the first insertion holes.

[0009] As a preferred technical solution of the utility model, a connecting rod is fixedly connected to the end of the external thread away from the extension rod, and a second external thread is fixedly connected to the other end of the connecting rod.

[0010] As a preferred technical solution of the utility model, a second insertion rod is slidably connected to the side of the second external thread close to the connecting rod. The lower end of the second insertion rod is inserted into a second insertion hole, and the second insertion hole is provided on the upper surface of a second extension rod. The second extension rod is slidably connected to the inner wall of the second external thread.

[0011] As a preferred technical solution of the present utility model, a nut is fixedly connected to the end of the second extension rod away from the second external thread, and a fixing groove is provided at the end of the nut away from the connecting rod.

[0012] As a preferred technical solution of the present utility model, the fixing groove is hexagonal, and the contraction end of the threaded drill bit is spirally wound towards the other end.

[0013] As a preferred technical solution of the present utility model, the first extension rod and the second extension rod are symmetrical about the connecting rod, the first extension rod and the second extension rod are straight rods, and the connecting rod is a threaded rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In the solution of the present utility model:

[0016] By rotating the threaded drill bit, the first threaded block is disengaged from the first external thread. After disengagement, the first threaded block is slid to make the first extension rod slide. During the sliding process, the screw is extended. Then, the first insertion rod can be slid. The first insertion rod slides downward and is inserted into the corresponding first insertion hole to realize the fixed limit of the connecting rod and the first threaded block. Then, the screw is fixed into the plate. After the fixing is completed, the screw is rotated inward. During the rotation process, if the length is not enough, the second extension rod can be slid outward in the same way to realize the effect of continuous extension. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 1 is an overall structural schematic diagram of a self-drilling screw with a front drill bit structure provided by the present utility model;

[0018] Figure 2 FIG. 2 is a schematic diagram of a self-drilling screw with a front drill bit structure provided by the present utility model;

[0019] Figure 3 FIG. 3 is a schematic diagram of an adjusting device of a self-drilling screw with a front drill bit structure provided by the present utility model;

[0020] Figure 4 FIG. 4 is a schematic diagram of a grinding device of a self-drilling screw with a front drill bit structure provided by the present utility model.

[0021] Labels in the figures:

[0022] 1. Threaded drill bit; 101. First threaded block; 102. First internal thread; 103. First external thread; 104. First extension rod; 105. First insertion hole; 106. First insertion rod;

[0023] 2. Connecting rod; 201. Second external thread;

[0024] 3. Second insertion rod; 301. Second insertion hole; 302. Second extension rod;

[0025] 4. Nut; 401. Fixed groove. Detailed implementation mode

[0026] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0028] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0030] Please refer to Figure 1 - Figure 4 , a drill tail screw with a front drill bit structure, including a threaded drill bit 1, the threaded drill bit 1 tapers from one end to the other end, a first threaded block 101 is fixedly connected to the threaded drill bit 1 away from the tapered end, an internal thread 102 is provided on the inner surface of the first threaded block 101, an external thread 103 is threadedly connected to the internal thread 102, a first extension rod 104 is slidably connected to the surface of the external thread 103 close to the first threaded block 101, a plurality of first jacks 105 are provided on the upper surface of the first extension rod 104, and a first plug rod 106 is inserted into any one of the first jacks 105.

[0031] When fixing the screw, the adjustment can be made first according to the thickness of the plate. During the adjustment process, the threaded drill bit 1 can be rotated first to disengage the first threaded block 101 from the external thread 103. After disengagement, the first threaded block 101 is slid to make the first extension rod 104 slide. During the sliding process, the screw is extended. Then, the first plug rod 106 can be slid. The first plug rod 106 slides downward and is inserted into the corresponding first jack 105 to realize the fixed limit of the connecting rod 2 and the first threaded block 101. Then, the screw is fixed into the plate. After the fixing is completed, the screw is rotated inward. During the rotation process, if the length is not enough, the same method can be used to slide the second extension rod 302 outward to achieve the effect of continuous extension.

[0032] A connecting rod 2 is fixedly connected to the end of the external thread 1 103 away from the extension rod 1 104, and the other end of the connecting rod 2 is fixedly connected to an external thread 2 201.

[0033] The connecting rod 2 fixedly connected to the end of the external thread 1 103 away from the extension rod 1 104 is used to fix the plate. When fixing, it is fixed by rotating inward. The external thread 2 201 fixedly connected to the other end of the connecting rod 2 is used to be fixed to the nut 4.

[0034] A second plug rod 3 is slidably connected to the end of the external thread 2 201 close to the connecting rod 2. The lower end of the second plug rod 3 is inserted into a second jack 301. The second jack 301 is arranged on the upper surface of the second extension rod 302, and the second extension rod 302 is slidably connected to the inner wall of the external thread 2 201.

[0035] The second plug rod 3 slidably connected to the end of the external thread 2 201 close to the connecting rod 2 is used to fix the second extension rod 302 for alignment and limit. When limiting, the second plug rod 3 can be slid and inserted into the second jack 301 on the second extension rod 302 to achieve limit fixation.

[0036] A nut 4 is fixedly connected to the end of the second extension rod 302 away from the external thread 2 201, and a fixing groove 401 is arranged at the end of the nut 4 away from the connecting rod 2.

[0037] The nut 4 fixedly connected to the end of the second extension rod 302 away from the external thread 2 201 is used to be docked with a screwdriver. The fixing groove 401 arranged at the end of the nut 4 away from the connecting rod 2 is used to be clamped with the screwdriver to fix the screw.

[0038] The fixing groove 401 is hexagonal, and the contraction end of the thread drill bit 1 is helically wound towards the other end.

[0039] The fixing groove 401 is set to be hexagonal to be connected with the screwdriver to fix the screw. In some cases, the fixing groove 401 can be set to be polygonal, and its shape can be adapted according to the shape of the screwdriver. The contraction end of the thread drill bit 1 is helically wound towards the other end to increase the contact area with the plate on the one hand for inward fixation.

[0040] The first extension rod 104 and the second extension rod 302 are symmetrical about the connecting rod 2. The first extension rod 104 and the second extension rod 302 are straight rods, and the connecting rod 2 is a threaded rod.

[0041] The first extension rod 104 and the second extension rod 302 are symmetrical about the connecting rod 2 to extend both ends of the connecting rod 2, thereby realizing the fixation of plates with different thicknesses. The first extension rod 104 and the second extension rod 302 are set as straight rods so that they can slide to achieve telescoping. The connecting rod 2 is set as a threaded rod so that it can rotate into the plate for fixation.

[0042] The using process of a self-drilling screw with a front drill bit structure provided by the present utility model is as follows:

[0043] When fixing the screw, it can be adjusted according to the thickness of the board first. During the adjustment process, the threaded drill bit 1 can be rotated first to separate the threaded block 101 from the external thread 103. After separation, the threaded block 101 can be slid to make the extension rod 104 slide. During the sliding process, the screw is extended. Then, the insertion rod 106 can be slid. The insertion rod 106 slides downward and is inserted into the corresponding insertion hole 105 to realize the fixed limit of the connecting rod 2 and the threaded block 101. Then, the screw is fixed into the board. After the fixing is completed, the screw is rotated inward. During the rotation process, if the length is not enough, the extension rod 302 can be slid outward in the same way to achieve the effect of continuous extension.

[0044] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0045] Obviously, the above-described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. The preferred embodiments of the present utility model are given in the drawings, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields is equally within the scope of the patent protection of the present utility model.

Claims

1. A self-drilling screw with a front drill bit structure, characterized in that, It includes a threaded drill bit (1), which tapers from one end to the other. A first threaded block (101) is fixedly connected to the threaded drill bit (1) away from the tapered end. An internal thread (102) is provided on the inner surface of the first threaded block (101), and an external thread (103) is threadedly connected to the internal thread (102). A first extension rod (104) is slidably connected to the surface of the external thread (103) close to the first threaded block (101). A number of first insertion holes (105) are provided on the upper surface of the first extension rod (104), and a first insertion rod (106) is inserted into any one of the first insertion holes (105).

2. The self-drilling screw with a front drill bit structure according to claim 1, characterized in that, The external thread (103) is fixedly connected to a connecting rod (2) at the end away from the first extension rod (104), and the other end of the connecting rod (2) is fixedly connected to a second external thread (201).

3. The self-drilling screw with a front drill bit structure according to claim 2, wherein A second insertion rod (3) is slidably connected to the second external thread (201) at the end close to the connecting rod (2). The lower end of the second insertion rod (3) is inserted into a second insertion hole (301), and the second insertion hole (301) is provided on the upper surface of a second extension rod (302). The second extension rod (302) is slidably connected to the inner wall of the second external thread (201).

4. The self - drilling screw with a front - end drill bit structure according to claim 3, characterized in that, A nut (4) is fixedly connected to the second extension rod (302) at the end away from the second external thread (201), and a fixing groove (401) is provided at the end of the nut (4) away from the connecting rod (2).

5. The drill tail screw with a front drill bit structure according to claim 4, characterized in that, The fixing groove (401) is hexagonal, and the tapered end of the threaded drill bit (1) spirally winds towards the other end.

6. The self-drilling screw with a front drill bit structure according to claim 3, characterized in that, The first extension rod (104) and the second extension rod (302) are symmetrical about the connecting rod (2). The first extension rod (104) and the second extension rod (302) are straight rods, and the connecting rod (2) is a threaded rod.

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