A type of internal Torx pan head Mitsubishi self-tapping screw

Abstract

An internal Torx pan head Mitsubishi self-tapping screw is characterized by comprising: a nut, a washer, and a stud; the center of the bottom of the nut is integrally formed with the top of the stud, and a Torx groove is formed in the center of the top of the nut; the stud has threads on its body, and a triangular head is formed in the center of the bottom of the stud body; the washer has an umbrella-shaped side, and a circular hole is formed in the center of the washer, the diameter of the circular hole in plan view matching the diameter of the stud in plan view. This utility model of an internal Torx pan head Mitsubishi self-tapping screw increases the overall friction of the washer by designing friction blocks on the washer, allowing the washer to rotate along with the nut, preventing stripping between the nut and the washer. Furthermore, the umbrella-shaped design of the washer increases the structural stress area and tension, thus preventing loosening and ensuring a secure lock.

Description

Technical Field

[0001] This utility model relates to the technical field of self-tapping screws, and in particular to a Mitsubishi self-tapping screw with an internal Torx pan head. Background Technology

[0002] Self-tapping screws, also known as quick-thread screws, are quick-installing fasteners made of steel with a passivated galvanized surface. They are primarily used for connecting thin metal sheets (steel plates, saw blades, etc.). The connection process involves first drilling a threaded hole in the parts to be connected, and then screwing the self-tapping screw into the threaded hole.

[0003] Currently, when self-tapping screws are used for threaded connections on metal sheets, the rigidity between metals often causes the screw head to dent at the connection point with the metal sheet, affecting the overall appearance of the metal sheet. To prevent this, workers usually put a washer on the screw for protection. However, the existing washer design affects the screw tension, and the surface of the washer is relatively smooth, so it does not rotate with the screw when it rotates. Repeated use can cause stripping. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an internal Torx pan head Mitsubishi self-tapping screw.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A type of internal Torx pan head Mitsubishi self-tapping screw, characterized in that it comprises: a nut, a washer, and a stud; the center of the bottom of the nut is integrally formed with the top of the stud, and a Torx groove is formed in the center of the top of the nut; the stud has threads on its body, and a triangular head is formed in the center of the bottom of the stud body; the washer has an umbrella-shaped side, and a circular hole is formed in the center of the washer, the diameter of the circular hole in plan view is adapted to the diameter of the stud in plan view; the washer is fitted onto the stud body, and friction blocks are arranged at equal intervals around the circumference of the washer on the side of the washer closest to the stud.

[0007] In one embodiment, the friction block has an arc-shaped top view, with a smooth design on one side in the clockwise direction and a angular design on the other side in the counterclockwise direction, and is arranged at equal intervals around the center of the circular hole.

[0008] In one embodiment, the bottom of the nut is provided with slots at equal intervals around the stud, and a slot is provided in the center of the inner cavity of the slots.

[0009] In one embodiment, the washer has protrusions arranged at equal intervals around the circumference with the circular hole as the center on the side near the nut, and an insert is provided in the center of the front of the protrusion.

[0010] In one embodiment, the shape and size of the card slot top view are the same as the shape and size of the protrusion top view, the number of card slots is the same as the number of protrusions and their positions correspond to each other, and the shape of the slot top view is the same as the shape of the insert top view.

[0011] In one embodiment, the width of the bump near the circular hole is smaller than that of the side away from the circular hole, and the shape of the bump's top view is trapezoidal.

[0012] In one embodiment, the height of the side of the slot body is the same as the height of the side of the plug, and the shape of the top view of the plug is elliptical.

[0013] Compared with the prior art, the present invention has at least the following advantages:

[0014] This utility model discloses an internal Torx pan head Mitsubishi self-tapping screw. By designing friction blocks on the washer, the overall friction of the washer can be increased. At the same time, the groove and slot designed on the bottom of the nut, together with the protrusion and insertion block designed on the washer, can connect the nut and the washer together. When the nut rotates, it can drive the washer to rotate together, preventing stripping between the nut and the washer. Furthermore, the umbrella-shaped design of the washer can increase the structural stress area and tension, thus preventing loosening and ensuring a firm lock. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0017] Figure 2 This is a perspective view of the front part of the present invention.

[0018] Figure 3 This is a schematic diagram of the gasket structure from a bottom view.

[0019] Figure 4 This is a schematic diagram of the stud structure from a bottom view.

[0020] Figure 5This is a top view of the nut structure of this utility model;

[0021] Figure 6 This is a side sectional view of the gasket of this utility model.

[0022] In the diagram: 1. Nut; 11. Torx groove; 12. Slot; 13. Slot; 2. Washer; 21. Round hole; 22. Protrusion; 23. Insertion block; 24. Friction block; 3. Stud; 31. Thread; 32. Triangular head. Detailed Implementation

[0023] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0024] like Figure 1-6 As shown, a type of internal Torx head Mitsubishi self-tapping screw includes: a nut 1, a washer 2, and a stud 3; the center of the bottom of the nut 1 is integrally formed with the top of the stud 3, and a Torx groove 11 is formed in the center of the top of the nut 1; the stud 3 has threads 31 on its body, and a triangular head 32 is formed in the center of the bottom of the stud 3; the washer 2 has an umbrella-shaped side, and a circular hole 21 is formed in the center of the washer 2, the diameter of the circular hole 21 in the top view is adapted to the diameter of the stud 3 in the top view, the washer 2 is fitted onto the body of the stud 3, and friction blocks 24 are arranged at equal intervals around the circumference of the side of the washer 2 closest to the stud 3. It should be noted that the triangular head designed at the bottom of the stud 3 can play an anti-loosening role, and the umbrella-shaped design of the washer 2 can increase the structural stress area and tension force, thus achieving the purpose of anti-loosening and secure locking.

[0025] like Figure 1-6 As shown, in one embodiment, the friction block 24 has an arc-shaped top view, with a smooth design on one side in the clockwise direction and a angular design on the other side in the counterclockwise direction, and is arranged at equal intervals around the center of the circular hole 21. It should be noted that the thickness of the friction block 24 is between 2mm and 3mm, and the friction block 24 and the rotating square of the thread 31 are designed in opposite directions.

[0026] like Figure 1-6As shown, in one embodiment, the bottom of the nut 1 has grooves 12 evenly spaced around the stud 3 at its center, and a slot 13 is located in the center of the inner cavity of the grooves 12. The washer 2, near the nut 1, has protrusions 22 evenly spaced around the circular hole 21 at its center, and an insert 23 is located in the center of the front of the protrusion 22. The shape and size of the grooves 12 in top view are the same as those of the protrusions 22 in top view. The number of grooves 12 is the same as the number of protrusions 22, and their positions correspond to each other. The shape of the slot 13 in top view is the same as that of the insert 23 in top view. The height of the side of the slot 13 is the same as the height of the side of the insert 23, and the shape of the insert 23 in top view is elliptical. It should be noted that the protrusions 22 and the insert 23 are both made of rigid plastic, while the washer 2 is made of soft rubber.

[0027] When in use, the operator needs to first put the washer 2 on the stud 3 and rotate it so that each protrusion 22 and insert 23 on the washer 2 can be inserted into each slot 12 and socket 13 in the nut 1. Then, the screw is threaded into the screw hole on the metal plate. When the screw is rotated, the washer 2 will rotate along with it, thereby preventing stripping between the nut 1 and the washer 2. At the same time, the friction block 24 designed at the bottom of the washer 2 can enhance the friction at the bottom of the washer 2, thereby increasing the structural stress area and tension, and achieving the purpose of preventing loosening and locking firmly.

[0028] like Figure 1-6 As shown, in one embodiment, the width of the protrusion 22 near the circular hole 21 is smaller than that of the side away from the circular hole 21, and the shape of the top view of the protrusion 22 is trapezoidal. It should be noted that the top view of the protrusion 22 is trapezoidal, and its height is 5mm~8mm, while the thickness of the slot 13 and the groove 12 is adapted to it.

[0029] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A type of internal Torx pan head Mitsubishi self-tapping screw, characterized in that, include: Nut (1), washer (2) and stud (3); the center of the bottom of the nut (1) is integrally formed with the top of the stud (3), and a plum blossom groove (11) is provided in the center of the top of the nut (1); the stud (3) is provided with a thread (31) on its body, and a triangular head (32) is provided in the center of the bottom of the stud (3); the side of the washer (2) is umbrella-shaped, and a round hole (21) is provided in the center of the washer (2), the diameter of the top view of the round hole (21) is matched with the diameter of the top view of the stud (3), the washer (2) is fitted onto the body of the stud (3), and friction blocks (24) are provided at equal intervals around the circumference on the side of the washer (2) close to the stud (3).

2. The Mitsubishi self-tapping screw with an internal Torx pan head as described in claim 1, characterized in that, The friction block (24) has an arc shape when viewed from above. Its clockwise side is rounded and its counterclockwise side is angular. It is arranged at equal intervals around the center of the circular hole (21).

3. The Mitsubishi self-tapping screw with an internal Torx pan head as described in claim 1, characterized in that, The bottom of the nut (1) is provided with a slot (12) at equal intervals around the stud (3) as the center, and a slot (13) is provided in the center of the inner cavity of the slot (12).

4. The Mitsubishi self-tapping screw with an internal Torx pan head as described in claim 3, characterized in that, The washer (2) has protrusions (22) arranged at equal intervals around the circumference with the hole (21) as the center on the side close to the nut (1). A plug (23) is arranged in the center of the front of the protrusion (22).

5. A Mitsubishi self-tapping screw with an internal Torx pan head according to claim 4, characterized in that, The shape and size of the card slot (12) from top view are the same as the shape and size of the protrusion (22) from top view. The number of card slots (12) is the same as the number of protrusions (22) and their positions correspond to each other. The shape of the slot (13) from top view is the same as the shape of the insert (23) from top view.

6. The Mitsubishi self-tapping screw with an internal Torx pan head according to claim 4, characterized in that, The width of the protrusion (22) on the side closer to the circular hole (21) is smaller than that on the side farther from the circular hole (21), and the shape of the top view of the protrusion (22) is trapezoidal.

7. A Mitsubishi self-tapping screw with an internal Torx pan head according to claim 5, characterized in that, The height of the side of the slot (13) is the same as the height of the side of the plug (23), and the shape of the top view of the plug (23) is elliptical.

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