Flow drill screw

Abstract

The utility model discloses a flow drill screw which comprises a screw rod and a screw head, the screw head is fixedly connected to the top end of the screw rod, a drilling-in section, a tapping section, a screwing-in section and a locking thread section are sequentially arranged on the outer side of the screw rod from the bottom end to the top end, and the included angle between the center line of the screw rod and the contour line of the edge of the top end of the locking thread section is minus degree. A groove is formed in the middle of the bottom end of the screw head. The self-tapping and self-drilling device is directly screwed into the aluminum plate, is very suitable for new energy vehicle types or other vehicle types adopting all-aluminum vehicle bodies, and can be screwed into the aluminum plate only by using a screw gun on a single surface, so that the convenience of the whole application is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of screws, in particular to a flow drill screw. Background Technique

[0002] A screw is a tool that uses the physical and mathematical principles of the inclined plane circular rotation and friction of an object to gradually fasten the parts of a utensil. A screw is a general term for fasteners.

[0003] Currently, screws are widely used in the body of new energy vehicles made of all aluminum. However, the assembly of screws in traditional technologies requires the setting of nuts and tightening at designated positions, resulting in a relatively long overall installation time and lack of convenience.

[0004] Therefore, the utility model provides a flow drill screw to solve the above problems. Content of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a flow drill screw to solve the above problems.

[0006] To achieve the above objectives, the utility model is realized through the following technical solutions: a flow drill screw, including a screw rod and a screw head, the screw head is fixedly connected to the top end of the screw rod, and the outer side of the screw rod is sequentially provided with a drilling section, a thread tapping section, a screwing section, and a locking thread section from the bottom end to the top end.

[0007] Preferably, the included angle between the center line of the screw rod and the top edge contour line of the locking thread section is 0-15 degrees.

[0008] Preferably, a groove is provided in the middle of the bottom end of the screw head.

[0009] Preferably, the drilling section includes a screwing section and an expanding section. The screwing section is located at the bottom end of the expanding section. The screwing section and the expanding section are integrally formed. The size of the screwing section is smaller than that of the expanding section. Both the screwing section and the expanding section are conical structures, and conical teeth are provided on the outer sides of the screwing section and the expanding section.

[0010] Preferably, a plurality of concave ribs are provided on the outer side of the drilling section.

[0011] Preferably, the longitudinal section shape of the thread tapping section is conical, and triangular teeth are provided on the outer side of the thread tapping section.

[0012] Preferably, an external thread is provided on the outer side of the thread tapping section.

[0013] Beneficial Effects

[0014] The utility model provides a flow drill screw. Compared with the prior art, the following beneficial effects are achieved:

[0015] Compared with traditional screws that are tightened and fixed on a stainless steel plate by means of nuts, etc., the flow drill screw of the present utility model is directly self-tapping and self-drilling into an aluminum plate, which is very suitable for new energy vehicle models or other vehicle models with all-aluminum bodies. It only needs to be driven in with a screw gun on one side, greatly improving the convenience of overall application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the present utility model;

[0017] Figure 2 is a side view of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the groove of the present utility model.

[0019] In the figure, 1 is the screw rod; 2 is the screw head; 3 is the drilling section; 4 is the thread tapping section; 5 is the screwing section; 6 is the locking thread section; 7 is the groove; 8 is the concave rib. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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.

[0021] Please refer to Figures 1-3 , a flow drill screw, comprising a screw rod 1 and a screw head 2. The screw head 2 is fixedly connected to the top end of the screw rod 1. The outer side of the screw rod 1 is sequentially provided with a drilling section 3, a thread tapping section 4, a screwing section 5, and a locking thread section 6 from the bottom end to the top end;

[0022] Specifically, the included angle between the center line of the screw rod 1 and the top edge contour line of the locking thread section 6 is 0-15 degrees;

[0023] Further, the length of the screw rod 1 is 22.4 millimeters;

[0024] Among them, in this embodiment, the diameter of the screw head 2 is 12.8 millimeters;

[0025] Specifically, a groove 7 is provided in the middle of the bottom end of the screw head 2. By using the groove 7, when the aluminum material melts, it will flow into the groove 7 and solidify in the groove 7 after cooling, thereby improving the fastening effect between the screw and the aluminum plate;

[0026] Further, a connection end for cooperating with an external screw gun is integrally formed in the middle of the top end of the screw head 2, and a plurality of arc-shaped grooves are formed in the connection end;

[0027] More specifically, the connection end is circular in shape, and the diameter of the connection end is 11 mm;

[0028] Further, a plurality of concave ribs 8 are arranged on the outer side of the drilling section 3. By arranging the concave ribs 8, the drilling section 3 can be more stably connected to the aluminum plate;

[0029] Further, the drilling section 3 includes a screwing-in section and an expanding section. The screwing-in section is located at the bottom end of the expanding section. The screwing-in section and the expanding section are integrally formed. The size of the screwing-in section is smaller than that of the expanding section. Both the screwing-in section and the expanding section are conical structures, and conical teeth are arranged on the outer sides of both the screwing-in section and the expanding section. By using the size change of the screwing-in section and the expanding section, during the overall screwing-in process, the contact surface between the screwing-in section and the aluminum plate is smaller, the resistance is smaller, and it is easier to screw into the aluminum plate, thereby ensuring the overall installation efficiency;

[0030] Specifically, the length of the screwing-in section is 4 mm, and the length of the expanding section is 6.5 mm;

[0031] In detail, the longitudinal section shape of the thread tapping section 4 is conical, and triangular teeth are arranged on the outer side of the thread tapping section 4. By using the shape characteristics of the thread tapping section 4, internal threads can be generated in the hole during the overall screwing-in process;

[0032] Specifically, external threads are arranged on the outer side of the thread tapping section 4, so that the thread tapping section 4 and the screwing-in section 5 can be screwed in smoothly and are easier to penetrate deeper;

[0033] Meanwhile, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0034] Working principle: By arranging the drilling section 3, during the overall installation and use process, the contact surface with the aluminum plate is smaller, the resistance is smaller, and it is easier to screw into the aluminum plate;

[0035] Compared with the traditional screw fixed to the stainless steel plate by means of a nut, etc., the present utility model directly uses self-tapping and self-drilling to screw into the aluminum plate, which is very suitable for new energy vehicle models or other models with all-aluminum bodies. It only needs to be screwed in with a screw gun on one side. Because of the existence of the drilling section 3, it can have a higher rotation speed, accelerate the heating of the aluminum plate, and then accelerate the heat fusion, so that the aluminum plate becomes soft and sinks at high temperature. Along with the overall screwing-in, corresponding internal threads can be formed on the aluminum plate. Relatively speaking, it is easier to drill holes. When the aluminum material is heat-fused, it will flow into the groove 7 and solidify in the groove 7 after cooling, thereby improving the fastening effect with the aluminum plate.

[0036] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0037] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flow drill screw, characterized in that: The invention comprises a screw rod (1) and a screw head (2), wherein the screw head (2) is fixedly connected to the top end of the screw rod (1), and the outer side of the screw rod (1) is provided with a drilling section (3), a tapping section (4), a screwing section (5) and a locking thread section (6) in sequence from the bottom end to the top end.

2. A flow drill screw according to claim 1, characterized in that: The angle between the center line of the screw rod (1) and the top edge contour line of the locking threaded section (6) is 0-15 degrees.

3. A flow drill screw according to claim 2, characterized in that: A groove (7) is provided in the middle of the bottom end of the screw head (2).

4. The flow drill screw according to claim 1, characterized in that: The drilling section (3) comprises a screw-in section and an expansion section, the screw-in section is located at the bottom end of the expansion section, the screw-in section and the expansion section are integrally formed, the size of the screw-in section is smaller than the size of the expansion section, and the screw-in section and the expansion section are both conical structures, and the outer sides of the screw-in section and the expansion section are both provided with conical teeth.

5. A flow drill screw according to claim 4, characterized in that: A plurality of concave ribs (8) are arranged on the outer side of the drilling section (3).

6. The flow drill screw according to claim 1, characterized in that: The longitudinal section of the tapping thread section (4) is in the shape of a cone, and the outer side of the tapping thread section (4) is provided with triangular teeth.

7. A flow drill screw according to claim 6, characterized in that: The outer side of the tapping thread section (4) is provided with an external thread.

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