Self-tapping type extrusion threaded sleeve

Abstract

The utility model discloses a self-tapping type extrusion thread sleeve which comprises a thread sleeve body and a thread sleeve tail arranged at the end of the thread sleeve body, inner holes are formed in the thread sleeve body and the thread sleeve tail, the radial section of the thread sleeve body and the radial section of the thread sleeve tail are in a circular ring shape, and internal threads are arranged on the inner walls of the thread sleeve body and the thread sleeve tail. Outer threads are arranged on the outer wall of the thread sleeve body and the outer wall of the thread sleeve tail, a plurality of planes are arranged on threads of the outer threads on the outer wall of the thread sleeve body in the circumferential direction, and the outer diameters of the threads of the outer threads on the outer wall of the thread sleeve tail are gradually reduced in the direction away from one end of the thread sleeve body. In the installation and use process of the self-tapping type extrusion threaded sleeve, no chippings remain, the chippings do not need to be cleaned away by spending redundant time, and the installation efficiency is improved; and moreover, a plurality of planes are arranged on the threads of the external threads on the outer wall of the thread sleeve body in the circumferential direction, so that the contact area between the external threads and a workpiece is reduced, the self-tapping type extrusion thread sleeve is easy to tap into the workpiece, time and labor are saved during tapping, and the mounting efficiency is high.

Description

Technical Field

[0001] The utility model relates to a self-tapping extrusion screw sleeve, belonging to the technical field of fasteners. Background Art

[0002] Self-tapping screw inserts are also called self-tapping screw inserts. They are a new type of fastener that strengthens the thread strength. They have teeth inside and outside. They can be embedded in plastic, aluminum cast iron, copper and other materials to form internal thread holes with higher strength. Self-tapping screw inserts can also repair damaged internal threads. Self-tapping screw inserts do not need to be pre-threaded when installed. They can play the role of self-tapping threads. They can be directly screwed into the reserved holes of the parent material using installation tools, thus saving a tapping process. They are easy to operate, easy to use, and economical and practical.

[0003] However, the existing self-drilling screw inserts all have chip grooves at the ports, and the screw inserts are easily deformed during installation, resulting in unqualified product installation. In addition, the existing self-drilling screw inserts are difficult to tap into the workpiece, and tapping is time-consuming and labor-intensive, resulting in low installation efficiency. In addition, the existing self-drilling screw inserts will generate debris during installation and use, and it takes extra time to clean up the debris, further reducing the installation efficiency. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a self-tapping extrusion screw sleeve. During the installation and use of the self-tapping extrusion screw sleeve, no debris will remain, and there is no need to spend extra time cleaning the debris, thereby improving the installation efficiency; and, the thread teeth of the external thread on the outer wall of the screw sleeve body are provided with several planes along the circumferential direction, which reduces the contact area between the external thread and the workpiece, making it easier for the self-tapping extrusion screw sleeve to tap into the workpiece, saving time and effort during tapping, and having high installation efficiency.

[0005] The utility model is realized by the following technical solutions:

[0006] A self-tapping extrusion screw sleeve comprises a screw sleeve body and a screw sleeve tail portion arranged at the end of the screw sleeve body, wherein the screw sleeve body and the screw sleeve tail portion are provided with inner holes, the inner walls of the screw sleeve body and the screw sleeve tail portion are provided with inner threads, the outer walls of the screw sleeve body and the screw sleeve tail portion are provided with outer threads, the screw teeth of the outer threads of the outer wall of the screw sleeve body are provided with a plurality of planes along the circumferential direction, and the outer radial direction of the screw teeth of the outer threads of the outer wall of the screw sleeve tail portion gradually decreases away from the end of the screw sleeve body.

[0007] In one embodiment of the present utility model, a plurality of the planes are evenly arranged circumferentially on the outer surface of the threads of the external threads of the outer wall of the screw sleeve body.

[0008] In one embodiment of the present invention, the cross section of the thread of the external thread on the outer wall of the screw sleeve body is a regular polygon.

[0009] In one embodiment of the present invention, the screw sleeve body and the screw sleeve tail are coaxial hollow cylinders.

[0010] In one embodiment of the present invention, the screw sleeve body and the screw sleeve tail are an integrated structure.

[0011] In one embodiment of the present utility model, the thread teeth of the external thread of the outer wall of the rear end of the screw sleeve are designed with a conical inclined surface structure.

[0012] In one embodiment of the present utility model, the inner hole passes through the entire screw sleeve body and the screw sleeve tail.

[0013] In one implementation of the present invention, the internal thread runs through the entire inner hole.

[0014] In one embodiment of the present utility model, the threads of the internal thread of the inner wall of the screw sleeve body and the threads of the internal thread of the inner wall of the screw sleeve tail are arranged with the same diameter.

[0015] In one embodiment of the utility model, a first inner chamfer is provided on the inner edge of the screw sleeve body away from one end of the screw sleeve tail, and a second inner chamfer is provided on the inner edge of the screw sleeve tail away from one end of the screw sleeve body, and the inclination angle of the first inner chamfer is greater than the inclination angle of the second inner chamfer.

[0016] The beneficial effects of the utility model are:

[0017] The self-drilling extrusion screw sleeve provided by the utility model is not provided with a chip groove at the port, which ensures the overall structural strength of the screw sleeve. The screw teeth of the internal thread are not easily squeezed and deformed during installation, thereby making the screw sleeve not easily deformed, ensuring the qualified rate of product installation and use. In addition, during the installation and use of the self-drilling extrusion screw sleeve, there will be no debris left in its inner hole, and there is no need to spend extra time to clean up the debris, thereby improving the installation efficiency. In addition, the screw teeth of the external thread on the outer wall of the screw sleeve body are arranged along the circumferential direction. The several planes reduce the contact area between the external thread and the workpiece, making it easier for the self-drilling extrusion screw sleeve to tap into the workpiece, saving time and effort during tapping, and having high installation efficiency; and due to the arrangement of the outer peripheral plane of the external thread, the contact position between the external thread and the workpiece will not generate debris, so there is no need to clean up the debris, further improving the installation efficiency, while also ensuring the cleanliness of the installation and construction working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the self-tapping extrusion screw sleeve provided by the utility model.

[0019] Figure 2 A three-dimensional diagram from another perspective of the self-tapping extrusion screw sleeve provided by the utility model.

[0020] Figure 3 The utility model is provided for a top view of the self-tapping extrusion screw sleeve.

[0021] Figure 4 This is a front view of the self-tapping extrusion screw sleeve provided by the utility model.

[0022] Figure 5 for Figure 4 AA section view in.

[0023] In the figure: 1, screw sleeve body; 2, inner hole; 3, internal thread; 4, external thread; 5, plane; 6, screw sleeve tail; 7, first inner chamfer; 8, second inner chamfer. DETAILED DESCRIPTION

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

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] like Figure 1-5As shown, this embodiment provides a self-tapping extrusion screw sleeve, including a screw sleeve body 1 and a screw sleeve tail portion 6 arranged at the end of the screw sleeve body 1, an inner hole 2 is arranged in the screw sleeve body 1 and the screw sleeve tail portion 6, an inner thread 3 is arranged on the inner wall of the screw sleeve body 1 and the screw sleeve tail portion 6, an external thread 4 is arranged on the outer wall of the screw sleeve body 1 and the screw sleeve tail portion 6, the thread teeth of the external thread 4 on the outer wall of the screw sleeve body 1 are provided with a plurality of planes 5 along the circumferential direction, and the outer radial direction of the thread teeth of the external thread 4 on the outer wall of the screw sleeve tail portion 6 gradually decreases away from the end of the screw sleeve body 1.

[0028] In some embodiments, a plurality of the planes 5 are evenly arranged circumferentially on the outer surface of the threads of the external thread 4 on the outer wall of the screw sleeve body 1 .

[0029] Furthermore, the cross section of the thread of the external thread 4 on the outer wall of the screw sleeve body 1 is a regular polygon.

[0030] During the installation and use of the self-drilling extrusion screw sleeve provided by this embodiment of the utility model, no debris will remain in the inner hole 2, and there is no need to spend extra time to clean up the debris, thereby improving the installation efficiency. In addition, the thread teeth of the external thread 4 on the outer wall of the screw sleeve body 1 are provided with several planes 5 along the circumferential direction, which reduces the contact area between the external thread 4 and the workpiece, making it easier for the self-drilling extrusion screw sleeve to tap into the workpiece, saving time and effort during tapping, and having high installation efficiency; and due to the setting of the outer circumferential plane 5 of the external thread 4, no debris will be generated at the contact position between the external thread 4 and the workpiece, so there is no need to clean up the debris, further improving the installation efficiency, while also ensuring the cleanliness of the installation construction work environment.

[0031] In some embodiments, the screw sleeve body 1 and the screw sleeve tail 6 are coaxial hollow cylinders.

[0032] In some embodiments, the screw sleeve body 1 and the screw sleeve tail 6 are an integrated structure. This structure makes the strength of the entire self-drilling extrusion screw sleeve higher, meeting the high-strength connection requirements between it and the workpiece.

[0033] In some embodiments, the thread of the external thread 4 on the outer wall of the screw sleeve tail 6 is designed with a conical inclined surface structure.

[0034] In this embodiment, the thread of the external thread 4 of the outer wall of the screw sleeve tail 6 is not provided with a flat surface 5. The thread of the external thread 4 of the outer wall of the screw sleeve tail 6 is designed with a conical inclined surface structure, which provides a guiding effect when tapping the self-tapping extrusion screw sleeve, facilitating its tapping operation.

[0035] In some embodiments, the inner hole 2 passes through the entire screw sleeve body 1 and the screw sleeve tail 6 .

[0036] Furthermore, the internal thread 3 runs through the entire inner hole 2 .

[0037] Further, the threads of the internal thread 3 on the inner wall of the screw sleeve body 1 and the threads of the internal thread 3 on the inner wall of the screw sleeve tail 6 are arranged with equal diameters. That is, the diameters of the threads of the internal thread 3 are the same from the screw sleeve body 1 to the screw sleeve tail 6.

[0038] In some embodiments, a first inner chamfer 7 is provided on the inner edge of the screw sleeve body 1 away from the screw sleeve tail 6, and a second inner chamfer 8 is provided on the inner edge of the screw sleeve tail 6 away from the screw sleeve body 1, and the inclination angle of the first inner chamfer 7 is greater than the inclination angle of the second inner chamfer 8.

[0039] In summary, the self-drilling extrusion screw sleeve provided by the utility model is not provided with a chip groove at the port, which ensures the overall structural strength of the screw sleeve, and the screw teeth of the internal thread are not easily squeezed and deformed during installation, thereby making the screw sleeve not easily deformed, ensuring the qualified rate of product installation and use. In addition, during the installation and use of the self-drilling extrusion screw sleeve, there will be no debris residue in its inner hole, and there is no need to spend extra time to clean up the debris, thereby improving the installation efficiency. In addition, the screw teeth of the external thread on the outer wall of the screw sleeve body are arranged along the circumferential direction. The several planes reduce the contact area between the external thread and the workpiece, making it easier for the self-drilling extrusion screw sleeve to tap into the workpiece, saving time and effort during tapping, and having high installation efficiency; and due to the arrangement of the outer peripheral plane of the external thread, the contact position between the external thread and the workpiece will not generate debris, so there is no need to clean up the debris, further improving the installation efficiency, while also ensuring the cleanliness of the installation and construction work environment.

[0040] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

[0042] The principles and implementation methods of the utility model are described in this article using specific examples. The description of the above examples is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. A self-tapping extrusion screw sleeve, characterized in that: The invention comprises a screw sleeve body and a screw sleeve tail portion arranged at the end of the screw sleeve body, wherein the screw sleeve body and the screw sleeve tail portion are provided with inner holes, the inner walls of the screw sleeve body and the screw sleeve tail portion are provided with inner threads, the outer walls of the screw sleeve body and the screw sleeve tail portion are provided with outer threads, the screw teeth of the outer threads of the outer wall of the screw sleeve body are provided with a plurality of planes along the circumferential direction, and the outer radial direction of the screw teeth of the outer threads of the outer wall of the screw sleeve tail portion gradually decreases away from the end of the screw sleeve body.

2. A self-tapping extrusion screw sleeve according to claim 1, characterized in that: A plurality of the planes are evenly arranged circumferentially on the outer surface of the thread teeth of the external thread on the outer wall of the screw sleeve body.

3. A self-tapping extrusion screw sleeve according to claim 2, characterized in that: The cross section of the thread teeth of the external thread on the outer wall of the screw sleeve body is a regular polygon.

4. A self-tapping extrusion screw sleeve according to claim 1, characterized in that: The screw sleeve body and the screw sleeve tail are coaxial hollow cylinders.

5. The self-tapping extrusion screw sleeve according to claim 1, characterized in that: The screw sleeve body and the screw sleeve tail are an integrated structure.

6. A self-tapping extrusion screw sleeve according to claim 1, characterized in that: The thread teeth of the external thread on the outer wall of the rear end of the screw sleeve are designed in a conical inclined surface structure.

7. The self-tapping extrusion screw sleeve according to claim 1, characterized in that: The inner hole passes through the entire screw sleeve body and the screw sleeve tail.

8. The self-tapping extrusion screw sleeve according to claim 7, characterized in that: The internal thread runs through the entire inner hole.

9. The self-tapping extrusion screw sleeve according to claim 1, characterized in that: The thread teeth of the internal thread on the inner wall of the screw sleeve body and the thread teeth of the internal thread on the inner wall of the screw sleeve tail are arranged with the same diameter.

10. The self-tapping extrusion screw sleeve according to claim 1, characterized in that: The inner edge of the screw sleeve body away from one end of the screw sleeve tail is provided with a first inner chamfer, and the inner edge of the screw sleeve tail away from one end of the screw sleeve body is provided with a second inner chamfer, and the inclination angle of the first inner chamfer is greater than the inclination angle of the second inner chamfer.

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