Double-thread self-tapping screw

Abstract

The utility model relates to the field of self-tapping screws, and discloses a double-thread self-tapping screw which comprises a thread end and an auxiliary thread end, auxiliary assemblies are arranged on the upper surface of the thread end and the lower surface of the auxiliary thread end, two sets of protection assemblies are arranged on the left surface and the right surface of each auxiliary assembly, and each auxiliary assembly comprises an auxiliary shell and an auxiliary block. A positioning column is fixedly connected to the axis of the lower surface of the inner wall of the auxiliary shell, two reinforcing plates are fixedly connected to the front side and the rear side, close to the positioning column, of the lower surface of the inner wall of the auxiliary shell, and two limiting grooves are formed in the front side and the rear side of the lower surface of an auxiliary block. According to the double-end self-tapping screw, through mutual matching of parts in the auxiliary assembly, replacement of the whole auxiliary tooth end is achieved, the phenomenon that the whole double-end self-tapping screw is scrapped due to loss of the auxiliary tooth end is avoided, convenience of maintenance and replacement of the double-end self-tapping screw by workers is improved, and practicability of the double-end self-tapping screw is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of self-tapping screws, in particular to a double-thread self-tapping screw. Background Art

[0002] Double-thread self-tapping screws are a special type of screw characterized by two threads on one end. These screws provide greater grip and stability, making them suitable for applications requiring a strong connection. They typically have fine threads on one end and coarse threads on the other, enabling effective fastening in different materials.

[0003] After searching, Chinese patent announcement number: CN219994119U discloses a double-headed self-tapping screw, including a polished rod portion, one end of the polished rod portion is provided with a first stud portion, the other end of the polished rod portion is provided with a second stud portion, the side surface of the polished rod portion is pressed with two turning grooves, a turning column is formed between the two turning grooves, a rivet through-hole is provided on the turning column, the orifice of the rivet through-hole is provided at the bottom of the turning groove, a rivet column that can be rotated therein is inserted into the rivet through-hole, one end of the rivet column is provided with an integrated pick that is close to the bottom of one turning groove, and the other end is provided with a split pick that is close to the bottom of the other turning groove, a rivet connecting hole is provided on the split pick, one end of the rivet column is inserted into the rivet connecting hole and riveted with the split pick; both the integrated pick and the split pick have two torsion plates with an angle of 180° between them, and when the integrated pick and the split pick rotate 90° around the axis of the rivet column, the two torsion plates extend out of the turning groove. The double-thread self-tapping screw has the characteristics of convenient and labor-saving pre-rotation, complete overall functions and strong practicality.

[0004] The above device has the following defects: when one end of the double-headed self-tapping screw is damaged, it is often necessary to disassemble and replace the entire double-headed self-tapping screw, which makes the entire double-headed self-tapping screw scrapped, wasting the use of materials, and the double-headed self-tapping screw embedded in the wall is prone to slipping due to its cylindrical shape during disassembly, which reduces the convenience of disassembling the double-headed self-tapping screw. Therefore, a double-headed self-tapping screw is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a double-ended self-tapping screw, which aims to improve the problem in the prior art that one end of the double-ended self-tapping screw is difficult to replace.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a double-thread self-tapping screw, comprising a thread end and an auxiliary thread end, the upper surface of the thread end and the lower surface of the auxiliary thread end are provided with auxiliary components, and two groups of protective components are provided on the left and right surfaces of the auxiliary components, the auxiliary components include an auxiliary shell and an auxiliary block, a positioning column is fixedly connected at the axis center of the lower surface of the inner wall of the auxiliary shell, two groups of reinforcing plates are fixedly connected on the front and rear sides of the lower surface of the inner wall of the auxiliary shell near the positioning column, two groups of limit grooves are provided on the front and rear sides of the lower surface of the auxiliary block, and a positioning groove is provided at the axis center of the left surface of the auxiliary block.

[0007] As a further description of the above technical solution: the protective component includes a protective block, the upper and lower surfaces of the protective block are fixedly connected to two groups of protective platforms, a plurality of groups of evenly distributed rubber strips are fixedly connected to the axis of the left surface of the protective block, and a protective groove is opened at the axis of the right surface of the protective block.

[0008] As a further description of the above technical solution: two groups of circular grooves are provided at the axis centers of the left and right surfaces of the outer wall of the auxiliary shell, and the inner walls of the circular grooves are threadedly connected with positioning bolts.

[0009] As a further description of the above technical solution: a fixing block is fixedly connected to the axis of the front and rear surfaces of the protective block, and four groups of slots are provided on the front and rear sides of the left and right surfaces of the auxiliary shell near the circular groove.

[0010] As a further description of the above technical solution: a clamping column is connected through the groove of the fixing block.

[0011] As a further description of the above technical solution: the auxiliary block is fixedly connected to the lower surface of the auxiliary tooth end.

[0012] As a further description of the above technical solution: the auxiliary shell is fixedly connected to the upper surface of the screw thread end.

[0013] As a further description of the above technical solution: the protective block is detachably connected to the inner wall of the card slot through a card column.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the auxiliary block, auxiliary shell, positioning column and other parts in the auxiliary assembly cooperate with each other through the connection relationship to realize the replacement of the entire auxiliary thread end, thereby avoiding the phenomenon of the entire double-headed self-tapping screw being scrapped due to the loss of the auxiliary thread end, improving the convenience of the staff in repairing and replacing the double-headed self-tapping screws, and enhancing the practicality of the double-headed self-tapping screws.

[0016] 2. In the present invention, the rubber strips, protective grooves, protective blocks and other components in the protective assembly cooperate with each other through the connection relationship, so that the double-thread self-tapping screws can be installed without slipping due to force, and the positioning bolts can be prevented from rusting due to contact with air after being embedded for a long time, thereby enhancing the convenience and protection effect of the double-thread self-tapping screws during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main body front view area of ​​a double-thread self-tapping screw proposed in the utility model;

[0018] Figure 2 This is an exploded schematic diagram of a local area of ​​the main body of a double-thread self-tapping screw proposed in the utility model;

[0019] Figure 3 This is a schematic diagram of a local area of ​​the auxiliary shell of a double-thread self-tapping screw proposed in the present invention;

[0020] Figure 4 This is an exploded schematic diagram of a partial cross-sectional area of ​​the auxiliary shell of a double-thread self-tapping screw proposed in the present invention;

[0021] Figure 5 This is a schematic diagram of the exploded parts of a local area of ​​a protective block of a double-thread self-tapping screw proposed in the utility model.

[0022] Legend:

[0023] 1. Screw end; 2. Auxiliary end; 3. Auxiliary component; 31. Auxiliary shell; 32. Reinforcement plate; 33. Positioning column; 34. Auxiliary block; 35. Limiting groove; 36. Positioning groove; 37. Positioning bolt; 38. Circular groove; 4. Protection component; 41. Protection block; 42. Protection platform; 43. Rubber strip; 44. Protection groove; 45. Fixing block; 46. Clamping column; 47. Clamping groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Reference Figure 1 - Figure 3The utility model provides an embodiment: a double-thread self-tapping screw, including a thread end 1 and an auxiliary thread end 2. After the thread end 1 is embedded in the wall, it plays a supporting role for the entire device. The auxiliary thread end 2 is set through the outer wall thread, which is convenient for connecting other accessories and improves the diversified use of the equipment. Auxiliary components 3 are set on the upper surface of the thread end 1 and the lower surface of the auxiliary thread end 2.

[0026] Reference Figure 3 - Figure 5 When the auxiliary tooth end 2 needs to be repaired or replaced, the protective component 4 is disassembled and the auxiliary component 3 is started. Two groups of protective components 4 are provided on the left and right surfaces of the auxiliary component 3. The auxiliary component 3 includes an auxiliary shell 31 and an auxiliary block 34. Two groups of circular grooves 38 are opened at the axis center of the left and right surfaces of the outer wall of the auxiliary shell 31. The inner wall of the circular groove 38 is threadedly connected with a positioning bolt 37. The staff uses a tool to release the limiting effect of the positioning bolt 37, so that the positioning bolt 37 is screwed out from the circular groove 38. After the limiting effect of the auxiliary block 34 is released, two groups of limiting grooves 35 are opened on the front and back sides of the lower surface of the auxiliary block 34. The left surface of the auxiliary block 34 is opened at the axis center. There is a positioning groove 36, which is pulled out by personnel through the auxiliary tooth end 2. The auxiliary block 34 is fixedly connected to the lower surface of the auxiliary tooth end 2, and the auxiliary shell 31 is fixedly connected to the upper surface of the screw tooth end 1. The positioning column 33 is fixedly connected to the axis of the lower surface of the inner wall of the auxiliary shell 31, so that the auxiliary block 34 is detached from the auxiliary shell 31, and the replacement of the entire auxiliary tooth end 2 is completed, avoiding the phenomenon that the entire double-headed self-tapping screw is scrapped due to the loss of the auxiliary tooth end 2. Two sets of reinforcing plates 32 are fixedly connected to the front and rear sides of the lower surface of the inner wall of the auxiliary shell 31 near the positioning column 33, which improves the convenience of staff in repairing and replacing the double-headed self-tapping screws and enhances the practicality of the double-headed self-tapping screws.

[0027] Reference Figure 3 - Figure 5, when it is necessary to install the double-headed self-tapping screws, start the protection component 4, which includes a protection block 41. The protection block 41 is detachably connected to the inner wall of the card slot 47 through the card column 46. The upper and lower surfaces of the protection block 41 are fixedly connected with two sets of protection platforms 42. The setting of the reinforcement plate 32 avoids the phenomenon of stress deformation of the auxiliary shell 31, improves the protection of the equipment during installation, and enhances the convenience and protection effect of the installation of the double-headed self-tapping screws. A plurality of groups of evenly distributed rubber strips 43 are fixedly connected to the axis of the left surface of the protection block 41. Since the middle part of the double-headed self-tapping screw is a flat part, the staff can clamp the rubber strip 43 in the protection block 41 with a tool. The rubber strip 43 improves the anti-slip property of the tool when it is used. In order to avoid slipping due to force when installing the double-headed self-tapping screws, a protective groove 44 is provided at the axis of the right surface of the protective block 41. The positioning bolt 37 is protected by the setting of the protective groove 44 to avoid rusting caused by the positioning bolt 37 being embedded for a long time and coming into contact with the air, thereby further enhancing the protection of the equipment. The front and rear surfaces of the protective block 41 are fixedly connected with a fixing block 45 at the axis, and a clamping column 46 is connected through the groove of the fixing block 45. The clamping column 46 is pulled out from the clamping groove 47 to realize the disassembly of the protective component 4. Four groups of clamping grooves 47 are provided on the front and rear sides of the left and right surfaces of the auxiliary shell 31 near the circular groove 38, which improves the convenience of the staff in installing and disassembling the protective component 4 and enriches the functionality of the equipment.

[0028] Working principle: When it is necessary to repair or replace the auxiliary tooth end 2, after disassembling the protective component 4, the auxiliary component 3 is started, and the staff uses a tool to release the limiting effect of the positioning bolt 37, so that the positioning bolt 37 is screwed out from the circular groove 38. After the limiting effect of the auxiliary block 34 is released, the staff pulls it out between the auxiliary tooth ends 2 to separate the auxiliary block 34 from the auxiliary shell 31, completing the replacement of the entire auxiliary tooth end 2, avoiding the phenomenon that the entire double-headed self-tapping screw is scrapped due to the loss of the auxiliary tooth end 2, improving the convenience of the staff in repairing and replacing the double-headed self-tapping screws, and enhancing the practicality of the double-headed self-tapping screws. When it is necessary to install the double-headed self-tapping screws, start the protective component 4. Since the middle part of the double-headed self-tapping screw is a flat part, the staff can easily install it. The staff can use the tool to clamp the rubber strip 43 in the protective block 41. The rubber strip 43 improves the anti-slip property of the tool when in use, so that the phenomenon of slipping due to force is avoided when installing the double-headed self-tapping screws. The setting of the reinforcing plate 32 avoids the phenomenon of deformation of the auxiliary shell 31 due to force, thereby improving the protection of the equipment during installation, and enhancing the convenience and protection effect of the installation of the double-headed self-tapping screws. The positioning bolt 37 is protected by the setting of the protective groove 44 to avoid the positioning bolt 37 from rusting due to contact with air after long-term use, further enhancing the protection of the equipment. The protective component 4 can be disassembled by pulling the card column 46 out of the card slot 47, thereby improving the convenience of the staff in installing and disassembling the protective component 4 and enriching the functionality of the equipment.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-thread self-tapping screw, comprising a thread end (1) and an auxiliary thread end (2), characterized in that: An auxiliary component (3) is provided on the upper surface of the screw thread end (1) and the lower surface of the auxiliary thread end (2); two groups of protective components (4) are provided on the left and right surfaces of the auxiliary component (3); the auxiliary component (3) comprises an auxiliary shell (31) and an auxiliary block (34); a positioning column (33) is fixedly connected to the axis of the lower surface of the inner wall of the auxiliary shell (31); two groups of reinforcing plates (32) are fixedly connected to the front and rear sides of the lower surface of the inner wall of the auxiliary shell (31) near the positioning column (33); two groups of limiting grooves (35) are provided on the front and rear sides of the lower surface of the auxiliary block (34); and a positioning groove (36) is provided at the axis of the left surface of the auxiliary block (34).

2. A double-ended self-tapping screw according to claim 1, characterized in that: The protection assembly (4) comprises a protection block (41), wherein the upper and lower surfaces of the protection block (41) are fixedly connected to two groups of protection platforms (42), the axis of the left surface of the protection block (41) is fixedly connected to multiple groups of evenly distributed rubber strips (43), and the axis of the right surface of the protection block (41) is provided with a protection groove (44).

3. The double-ended self-tapping screw according to claim 1, characterized in that: Two groups of circular grooves (38) are provided at the axis centers of the left and right surfaces of the outer wall of the auxiliary shell (31), and the inner walls of the circular grooves (38) are threadedly connected with positioning bolts (37).

4. The double-ended self-tapping screw according to claim 2, characterized in that: The front and rear surfaces of the protection block (41) are fixedly connected to a fixed block (45) at their axis. The left and right surfaces of the auxiliary shell (31) are each provided with four groups of slots (47) on both the front and rear sides close to the circular groove (38).

5. The double-ended self-tapping screw according to claim 4, characterized in that: A clamping column (46) is connected through the groove of the fixing block (45).

6. The double-ended self-tapping screw according to claim 1, characterized in that: The auxiliary block (34) is fixedly connected to the lower surface of the auxiliary tooth end (2).

7. The double-ended self-tapping screw according to claim 1, characterized in that: The auxiliary shell (31) is fixedly connected to the upper surface of the screw thread end (1).

8. The double-ended self-tapping screw according to claim 5, characterized in that: The protection block (41) is detachably connected to the inner wall of the clamping slot (47) via a clamping column (46).

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