Self drilling screw with guiding function

Abstract

The self-drilling screw with the guiding function comprises a guiding column, a guiding hole, guiding strips, a guiding block, a spring and a self-drilling screw body, the vertically-arranged guiding hole is formed in the guiding column and provided with openings in the upper end and the lower end of the guiding column, the multiple vertically-arranged guiding strips are arranged on the inner wall of the guiding hole, and the guiding blocks are arranged on the guiding strips. The guide block is located in the guide column and matched with the guide hole, a vertically-formed receding hole is formed in the guide block, a plurality of guide grooves in one-to-one correspondence with the guide strips are formed in the outer wall of the guide block, and the guide strips are embedded into the guide grooves. According to the self-drilling screw, the guide column, the guide hole, the guide strip, the guide block and the spring are matched, so that the self-drilling screw body has a guide function in the screwing process, and the self-drilling screw is not prone to deflection.

Description

[Technical field]

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of self-drilling screws. [Background technology]

[0002] The tail of the self-drilling screw is in the shape of a drill tail or a pointed tail. It does not require auxiliary processing and can be directly drilled, tapped, and locked on the setting material or base material, greatly saving construction time. Compared with ordinary screws, it has higher toughness and retention, and will not loosen after a long time of assembly. It is safe to use and the drilling and tapping can be completed in one operation. Ordinary self-drilling screws do not have a guide structure when screwing in. The self-drilling screw is easy to deflect when it is turned. The head of the self-drilling screw may not fit the surface of the workpiece, resulting in a poor connection effect of the self-drilling screw.

[0003] The existing patent CN220396215U discloses a self-drilling screw, which is guided by a combination of a rotating ring, an iron sheet and a support ring to prevent the self-drilling screw from being deflected when being screwed. However, during the screwing process, the combination of the rotating ring, the iron sheet and the support ring will gradually deform, and eventually remain in the form of a gasket substitute. However, in some cases, gaskets or corresponding substitutes are not needed. In some cases, the gasket substitute formed by this type of self-drilling screw cannot meet the demand. At the same time, when the length of the self-drilling screw is long, the size of the gasket substitute formed will be too large, so the versatility of this type of self-drilling screw is poor. [Contents of the utility model]

[0004] The utility model aims to solve the problems in the prior art and provides a self-drilling screw with a guiding function, which can make the self-drilling screw have a guiding function and is not easy to deflect when being screwed, and no additional accessories will be added after being tightened.

[0005] To achieve the above-mentioned purpose, the utility model proposes a self-drilling screw with a guiding function, comprising a guide column, a guide hole, a guide strip, a guide block, a spring, and a self-drilling screw body, wherein a vertically arranged guide hole is provided inside the guide column, the guide hole is open at both upper and lower ends of the guide column, a plurality of vertically arranged guide strips are provided on the inner wall of the guide hole, the guide block is located inside the guide column, the guide block is adapted to the guide hole, a vertically arranged avoidance hole is provided on the guide block, a plurality of guide grooves corresponding to the guide strips are provided on the outer wall of the guide block, the guide strips are embedded in the guide grooves, the self-drilling screw body is located inside the guide hole, and the self-drilling screw body consists of a head, a screw rod and a drill bit connected in sequence from top to bottom. The guide block is composed of a main body block and a mounting block, a side groove is provided on the main body block, and the side groove is open at both upper and lower ends and side walls of the main body block, and the groove bottom of the side groove is semicircular, and the side groove allows the screw part of the drill tail screw body to move from the side opening end of the side groove to the groove bottom of the side groove. A detachable mounting block is installed in the side groove, and the mounting block is provided with a concave semicircular arc surface facing the side groove end, and the groove bottom and the semicircular arc surface of the side groove jointly constitute the inner wall of the avoidance hole, and a spring is provided inside the guide hole, and the top end of the spring is against the guide block, and the spring surrounds the screw part and the drill tail part, and the spring allows the head to pass through.

[0006] Preferably, a mounting groove is provided on the side wall of the side groove, the mounting groove is arranged horizontally, and a mounting strip adapted to the mounting groove is provided on the mounting block, and the mounting strip is embedded in the mounting groove.

[0007] Preferably, guide grooves are provided on the main body block and the mounting block.

[0008] Preferably, an annular embedding groove is provided at the bottom of the guide block, and the top end of the spring is embedded in the annular embedding groove.

[0009] Preferably, a plurality of anti-slip protrusions are provided on the outer wall of the guide column.

[0010] Preferably, the head is provided with a twisting groove.

[0011] The beneficial effects of the utility model are as follows: the utility model matches the guide column, the guide hole, the guide strip, the guide block and the spring, so that the drill screw body has a guiding function during the screwing process, and the drill screw is not easy to deflect; the detachable design of the guide block allows the guide block to be separated from the drill screw body, and the guide block will not be left behind after the drill screw body is tightened.

[0012] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0013] Figure 1This is a front view of the first embodiment of the self-drilling screw with a guiding function of the utility model;

[0014] Figure 2 It is a top view of the first embodiment of the self-drilling screw with a guiding function of the utility model;

[0015] Figure 3 This is a top view of a guide block of a first embodiment of a self-drilling screw with a guiding function of the utility model;

[0016] Figure 4 The utility model is a side view of a guide block of a second embodiment of a self-drilling screw with a guiding function.

[0017] In the figure: 1-guide column, 2-guide block, 3-drill screw body, 4-spring, 10-guide strip, 11-guide hole, 20-guide groove, 21-main block, 22-mounting block, 23-mounting groove, 24-mounting strip, 25-avoidance hole, 30-twisting groove, 31-head, 32-screw part, 33-drill tail part. [Specific implementation method]

[0018] Embodiment 1:

[0019] See also Figure 1 , Figure 2 , Figure 3The utility model has a self-drilling screw with a guiding function, including a guide column 1, a guide hole 11, a guide bar 10, a guide block 2, a spring 4, and a self-drilling screw body 3. A vertically arranged guide hole 11 is provided inside the guide column 1. The guide hole 11 is open at both upper and lower ends of the guide column 1. A plurality of vertically arranged guide bars 10 are provided on the inner wall of the guide hole 11. The guide block 2 is located inside the guide column 1. The guide block 2 is adapted to the guide hole 11. A vertically arranged avoidance hole 25 is provided on the guide block 2. A plurality of guide grooves 20 corresponding to the guide bars 10 are provided on the outer wall of the guide block 2. The guide bars 10 are embedded in the guide grooves 20. The self-drilling screw body 3 is located inside the guide hole 11. The self-drilling screw body 3 is composed of a head 31, a screw portion 32 and a drill tail portion 33 connected in sequence from top to bottom. The head 31 abuts against the upper end surface of the guide block 2. The screw portion 32 passes through the avoidance hole 25. The outer diameter of the screw portion 32 is equal to The inner diameter of the avoidance hole 25, the guide block 2 is composed of a main body block 21 and a mounting block 22, a side groove is provided on the main body block 21, the side groove is open at both ends and side walls of the main body block 21, the bottom of the side groove is semicircular, the side groove allows the screw portion 32 of the drill screw body 3 to move from the side opening end of the side groove to the bottom of the side groove, a detachable mounting block 22 is installed in the side groove, the mounting block 22 is provided with a concave semicircular arc surface towards the side groove end, the bottom of the side groove and The semicircular arc surfaces together constitute the inner wall of the avoidance hole 25. A spring 4 is provided inside the guide hole 11. The top end of the spring 4 abuts against the guide block 2. The spring 4 surrounds the screw portion 32 and the drill tail portion 33. The spring 4 allows the head 31 to pass through. The guide column 1 and the spring 4 both abut against the mounting surface for screwing into the drill screw body 3 and when the drill screw body 3 is not inserted into the guide hole 11, the spring 4 abuts against the guide block 2 and the upper end surface of the guide block 2 is slightly lower than the upper end surface of the guide column 1.

[0020] In order to ensure the smooth movement of the guide block 2 , guide grooves 20 are provided on the main block 21 and the mounting block 22 .

[0021] In order to prevent the spring 4 and the guide block 2 from relative horizontal movement, an annular embedding groove is provided at the bottom of the guide block 2, and the top end of the spring 4 is embedded in the annular embedding groove.

[0022] In order to ensure that the guide column 1 is not easy to rotate when the self-drilling screw body 3 is screwed, a plurality of anti-slip protrusions are arranged on the outer wall of the guide column 1 .

[0023] The head 31 is provided with a screwing groove 30 .

[0024] Embodiment 2:

[0025] See also Figure 4On the basis of the first embodiment, a mounting groove 23 is provided on the side wall of the side groove, the mounting groove 23 is horizontally arranged, and a mounting strip 24 adapted to the mounting groove 23 is provided on the mounting block 22, and the mounting strip 24 is embedded in the mounting groove 23.

[0026] Working process of this utility model:

[0027] In the working process of the self-drilling screw with a guiding function of the utility model, taking the self-drilling screw body 3 being screwed vertically downward into a workpiece as an example, the bottom end of the guide column 1 is against the surface of the workpiece, the spring 4 is placed in the guide hole 11, and a gasket can be placed before the spring 4 is placed when necessary, the guide block 2 is installed in the guide hole 11, the self-drilling screw body 3 is inserted into the guide hole 11, the guide column 1 is grasped and pressed downward, and the self-drilling screw body 3 is pressed downward using a tool adapted to the screwing groove 30 until the self-drilling screw body 3 is against the surface of the workpiece, and then the drill is turned. The self-drilling screw body 3 can be vertically screwed into the workpiece due to the guidance of the guide block 2 without deflection. When the self-drilling screw body 3 is screwed into a certain depth, the guide column 1 is pulled out upward, the mounting block 22 is removed from the main block 21, the main block 21 is separated from the self-drilling screw body 3, and the spring 4 is pulled out upward. Since the self-drilling screw 3 has been vertically screwed into a certain depth at this time, the self-drilling screw body 3 can be continued to be screwed vertically downward under the guidance of the screwing-in part until the self-drilling screw body 3 is tightened.

[0028] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A self-drilling screw with a guiding function, characterized in that: The invention comprises a guide column (1), a guide hole (11), a guide strip (10), a guide block (2), a spring (4), and a self-drilling screw body (3). A vertically arranged guide hole (11) is provided inside the guide column (1). The guide hole (11) is open at both upper and lower ends of the guide column (1). A plurality of vertically arranged guide strips (10) are provided on the inner wall of the guide hole (11). The guide block (2) is located inside the guide column (1). The guide block (2) is adapted to the guide hole (11). A vertically arranged avoidance hole (25) is provided on the guide block (2). A plurality of guide grooves (20) corresponding to the guide strips (10) are provided on the outer wall of the guide block (2). The guide strips (10) are embedded in the guide grooves (20). The self-drilling screw body (3) is located inside the guide hole (11). The self-drilling screw body (3) is composed of a head (31), a screw rod (32), and a drill tail (33) connected in sequence from top to bottom. The head (31) is provided with a screw rod (32), and a drill tail (33) is provided with a screw rod (32). 1) against the upper end surface of the guide block (2), the screw portion (32) passes through the avoidance hole (25), the outer diameter of the screw portion (32) is equal to the inner diameter of the avoidance hole (25), the guide block (2) is composed of a main block (21) and a mounting block (22), a side groove is provided on the main block (21), the side groove is open at both upper and lower ends and the side wall of the main block (21), the groove bottom of the side groove is semicircular, and the side groove allows the screw portion (32) of the drill screw body (3) to be opened from the side of the side groove The mouth end moves to the bottom of the side groove, a detachable mounting block (22) is installed in the side groove, the mounting block (22) is provided with a concave semicircular arc surface facing the side groove end, the groove bottom of the side groove and the semicircular arc surface together constitute the inner wall of the avoidance hole (25), a spring (4) is provided inside the guide hole (11), the top end of the spring (4) abuts against the guide block (2), the spring (4) surrounds the screw part (32) and the drill tail part (33), and the spring (4) allows the head (31) to pass through.

2. The self-drilling screw with a guiding function according to claim 1, characterized in that: The side wall of the side groove is provided with a mounting groove (23), the mounting groove (23) is arranged horizontally, and the mounting block (22) is provided with a mounting strip (24) adapted to the mounting groove (23), and the mounting strip (24) is embedded in the mounting groove (23).

3. The self-drilling screw with a guiding function according to claim 1, characterized in that: The main body block (21) and the mounting block (22) are both provided with guide grooves (20).

4. The self-drilling screw with a guiding function according to claim 1, characterized in that: The bottom of the guide block (2) is provided with an annular embedding groove, and the top end of the spring (4) is embedded in the annular embedding groove.

5. The self-drilling screw with a guiding function according to claim 1, characterized in that: A plurality of anti-slip protrusions are arranged on the outer wall of the guide column (1).

6. The self-drilling screw with a guiding function according to claim 1, characterized in that: The head (31) is provided with a twisting groove (30).

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