CN215890733U - High-toughness self-tapping screw - Google Patents
High-toughness self-tapping screw Download PDFInfo
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- CN215890733U CN215890733U CN202121683192.2U CN202121683192U CN215890733U CN 215890733 U CN215890733 U CN 215890733U CN 202121683192 U CN202121683192 U CN 202121683192U CN 215890733 U CN215890733 U CN 215890733U
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Abstract
The utility model discloses a high-toughness self-tapping screw which comprises a nut, a cross groove, a cylinder, a circular truncated cone, a screw rod, a first external thread, a groove, a cone and a second external thread, wherein the center of the upper end face of the nut is provided with the cross groove, the coaxial cone is arranged right below the nut, the vertex of the cone is vertically arranged downwards, the coaxial cylinder, the circular truncated cone and the screw rod are sequentially arranged from the lower end face of the nut to the upper end face of the cone, the diameter of the lower end face of the cylinder is the same as that of the upper end face of the circular truncated cone, the diameter of the lower end face of the circular truncated cone is the same as that of the upper end face of the screw rod, the diameter of the upper end face of the circular truncated cone is slightly larger than that of the lower end face of the circular truncated cone, the diameter of the lower end face of the screw rod is the same as that of the upper end face of the cone, the surface of the screw rod is provided with the first external thread, the surface of the cone is provided with the second external thread, and the first external thread is matched with the second external thread. According to the utility model, the reinforcing ribs are arranged on the two sides of the notch of the cross groove, so that the notch strength of the cross groove can be enhanced, and the cross groove is not easy to damage when a screw is screwed by a screwdriver.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of screws, in particular to the technical field of high-toughness self-tapping screws.
[ background of the utility model ]
The self-tapping screw, or fast-tooth screw, is a steel fast-assembling fastener with galvanized and passivated surface. Tapping screws are often used for connecting thin metal plates (steel plates, saw plates, etc.). During connection, a threaded bottom hole is formed in the connected piece, then the self-tapping screw is screwed into the threaded bottom hole of the connected piece, and the self-tapping screw needs to bear large pressure in the process of expanding the threaded bottom hole to a fixed block matched with the threaded bottom hole, so that the high-toughness self-tapping screw is needed to be provided.
[ Utility model ] content
The utility model aims to solve the problems in the prior art and provides a high-toughness tapping screw which can reduce the pressure borne by the tapping screw during screwing.
In order to achieve the purpose, the utility model provides a high-toughness self-tapping screw, which comprises a screw cap, a cross groove, a cylinder, a circular truncated cone, a screw rod, a first external thread, a groove, a cone and a second external thread, wherein the cross groove is arranged in the center of the upper end face of the screw cap, the coaxial cone is arranged right below the screw cap, the vertex of the cone is vertically arranged downwards, the coaxial cylinder, the circular truncated cone and the screw rod are sequentially arranged from the lower end face of the screw cap to the upper end face of the cone, the diameter of the lower end face of the cylinder is the same as that of the upper end face of the circular truncated cone, the diameter of the lower end face of the circular truncated cone is the same as that of the upper end face of the screw rod, the diameter of the upper end face of the circular truncated cone is slightly larger than that of the lower end face of the circular truncated cone, the surface of the screw rod is provided with the first external thread, the surface of the cone is provided with the second external thread, the first external thread and the second external thread are adaptive to each other, and the surface of a screw rod and a cone assembly is provided with a plurality of grooves which are axially arranged, the recess extends to the second external thread bottommost end from first external screw thread topmost, and the degree of depth of recess is slightly less than the difference between the major diameter and the path of first external screw thread.
Preferably, reinforcing ribs are arranged on two sides of the notch of the cross groove.
Preferably, a sharp needle which is vertically arranged downwards is arranged at the vertex of the cone, and the sharp needle is coaxial with the cone.
The utility model has the beneficial effects that: the reinforcing ribs are arranged on the two sides of the notch of the cross groove, so that the strength of the notch of the cross groove can be enhanced, and the cross groove is not easy to damage when a screw is screwed by a screwdriver; the pointed needle which is vertically arranged downwards is arranged at the vertex of the cone, and the pointed needle can be used for positioning a screw more accurately; the self-tapping screw is screwed on the surface of an object, the self-tapping screw is forcibly screwed into a threaded bottom hole through the combined action of the first external thread and the second external thread and is transformed into a matched fixed hole, the hole wall of the fixed hole can strongly extrude the screw rod and the cone of the self-tapping screw, and in the forming process of the fixed hole, object scraps can be generated in the hole wall of the fixed hole and are not easily discharged, the pressure of the hole wall of the fixed hole on the screw rod and the cone is further enhanced by the object scraps, partial object scraps can be discharged by the groove, the pressure reduction is realized for the self-tapping screw, meanwhile, the compression surface of the self-tapping screw is reduced, the pressure received by the screw rod during rotation is reduced, the connection between the self-tapping screw and the fixed hole orifice of the fixed hole is firmer and is not easy to loosen, and the circular truncated cone plays a transition role when the cylinder enters the fixed hole orifice of the sealed self-tapping screw.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a front view of a high toughness self-tapping screw of the present invention;
fig. 2 is a top view of the shank of a high toughness self-tapping screw of the present invention.
Fig. 3 is a top view of a high toughness self-tapping screw of the present invention.
[ detailed description ] embodiments
Referring to fig. 1, 2 and 3, the high-toughness self-tapping screw comprises a screw cap 1, a cross groove 11, a cylinder 2, a circular truncated cone 3, a screw rod 4, a first external thread 41, a groove 42, a cone 6 and a second external thread 61, wherein the cross groove 11 is arranged in the center of the upper end face of the screw cap 1, the coaxial cone 6 is arranged right below the screw cap 1, the vertex of the cone 6 is vertically arranged downwards, the coaxial cylinder 2, the circular truncated cone 3 and the screw rod 4 are sequentially arranged from the lower end face of the screw cap 1 to the upper end face of the cone 6, the diameter of the lower end face of the cylinder 2 is the same as that of the upper end face of the circular truncated cone 3, the diameter of the lower end face of the circular truncated cone 3 is slightly larger than that of the lower end face of the circular truncated cone 3, the diameter of the lower end face of the screw rod 4 is the same as that of the upper end face of the cone 6, the first external thread 41 is arranged on the surface of the screw rod 4, the second external thread 61 is arranged on the surface of the cone 6, first external screw thread 41, second external screw thread 61 suit, and the surface of screw rod 4 and circular cone 6 combination is equipped with the recess 42 that a plurality of axial set up, and recess 42 extends to second external screw thread 61 bottommost from first external screw thread 41 topmost, and the degree of depth of recess 42 slightly is less than the difference between the major diameter and the path of first external screw thread 41, the notch both sides of cross recess 11 are equipped with strengthening rib 12, the summit department of circular cone 6 is equipped with vertical sharp needle 7 and the sharp needle 7 that sets up downwards and is coaxial with circular cone 6.
The working process of the utility model is as follows:
in the working process of the high-toughness self-tapping screw, the reinforcing ribs 12 are arranged on the two sides of the notch of the cross groove 11, so that the strength of the notch of the cross groove 11 can be enhanced, and the cross groove 11 is not easy to damage when a screw is screwed by a screwdriver; the pointed needle 7 which is vertically arranged downwards is arranged at the vertex of the cone 6, and the pointed needle 7 can be used for positioning screws more accurately; when the self-tapping screw is screwed on the surface of an object, the self-tapping screw is forcibly screwed into the thread bottom hole through the combined action of the first external thread 41 and the second external thread 61 and is transformed into a corresponding fixing hole, the hole wall of the fixing hole can strongly extrude the screw rod 4 and the cone 6 of the self-tapping screw, and object scraps generated in the hole wall of the fixing hole are difficult to discharge in the forming process of the fixing hole, the object scraps further enhance the pressure of the hole wall of the fixing hole on the screw rod 4 and the cone 6, the grooves 42 can discharge part of the object scraps, reduce the pressure of the tapping screw, meanwhile, the compression surface of the tapping screw is reduced, the pressure received by the screw rod 4 is reduced when the screw rod is rotated, the connection between the tapping screw and the hole opening of the fixing hole of the tapping screw is firmer and is not easy to loosen due to the cylinder 2, and the circular truncated cone 3 plays a transition role when the cylinder 2 enters the hole opening of the fixing hole for sealing the tapping screw.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (3)
1. A high toughness self-tapping screw characterized by: comprises a screw cap (1), a cross groove (11), a cylinder (2), a circular truncated cone (3), a screw rod (4), a first external thread (41), a groove (42), a cone (6) and a second external thread (61), wherein the cross groove (11) is arranged at the center of the upper end surface of the screw cap (1), the coaxial cone (6) is arranged under the screw cap (1), the vertex of the cone (6) is vertically arranged downwards, the coaxial cylinder (2), the circular truncated cone (3) and the screw rod (4) are sequentially arranged from the lower end surface of the screw cap (1) to the upper end surface of the cone (6), the lower end surface of the cylinder (2) is the same as the diameter of the upper end surface of the circular truncated cone (3), the lower end surface of the circular truncated cone (3) is the same as the diameter of the upper end surface of the screw rod (4), the diameter of the upper end surface of the circular truncated cone (3) is slightly larger than the diameter of the lower end surface of the circular truncated cone (3), and the diameter of the lower end surface of the screw rod (4) is the upper end surface of the circular truncated cone (6), the surface of screw rod (4) is equipped with first external screw thread (41), the surface of circular cone (6) is equipped with second external screw thread (61), first external screw thread (41), second external screw thread (61) suit, screw rod (4) are equipped with recess (42) that a plurality of axial set up with the surface of circular cone (6) combination body, recess (42) are followed first external screw thread (41) and are extended to second external screw thread (61) lower extreme topmost, the degree of depth of recess (42) slightly is less than the difference between the major diameter and the path of first external screw thread (41).
2. A high toughness self-tapping screw as claimed in claim 1, wherein: reinforcing ribs (12) are arranged on two sides of the notch of the cross groove (11).
3. A high toughness self-tapping screw as claimed in claim 1, wherein: the top point of the cone (6) is provided with a vertical and downward sharp needle (7), and the sharp needle (7) is coaxial with the cone (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121683192.2U CN215890733U (en) | 2021-07-23 | 2021-07-23 | High-toughness self-tapping screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121683192.2U CN215890733U (en) | 2021-07-23 | 2021-07-23 | High-toughness self-tapping screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215890733U true CN215890733U (en) | 2022-02-22 |
Family
ID=80501458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121683192.2U Active CN215890733U (en) | 2021-07-23 | 2021-07-23 | High-toughness self-tapping screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215890733U (en) |
-
2021
- 2021-07-23 CN CN202121683192.2U patent/CN215890733U/en active Active
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