CN211039325U - Self-locking self-tapping - Google Patents
Self-locking self-tapping Download PDFInfo
- Publication number
- CN211039325U CN211039325U CN201921679139.8U CN201921679139U CN211039325U CN 211039325 U CN211039325 U CN 211039325U CN 201921679139 U CN201921679139 U CN 201921679139U CN 211039325 U CN211039325 U CN 211039325U
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- self
- screw
- tapping
- thread
- head
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Abstract
The utility model discloses a self-locking self-tapping, including head and screw rod, the head is multilateral body structure, the screw rod includes cylinder portion and tapered portion, cylinder portion and tapered portion surface are equipped with first screw thread portion and second screw thread portion in proper order, first screw thread portion and second screw thread portion department of meeting are equipped with the transition screw thread, the thread of first screw thread portion and second screw thread portion is arc column structure, the transition screw thread is the conch column structure, the head surface has been seted up to the perforation, the interior hexagonal blind hole has been seted up in the head. The threads on the two sides of the screw are arranged in an opposite arc shape, so that the stress surfaces of the threads on the two sides are opposite, a self-locking effect is realized on the position of the screw, and the problem that self-tapping is easy to loosen is solved; the transition thread of the shell-shaped structure is arranged, so that the first thread part has a transition through the second thread part, and the screw cannot be clamped.
Description
Technical Field
The utility model relates to a from tapping technical field, especially, relate to a self-locking self-tapping.
Background
The self-tapping screw is a screw with a drill bit, and the drilling, tapping, fixing and locking are completed at one time through special tool construction. The self-tapping screw is mainly used for connecting and fixing thin plate pieces, such as connection of a color steel plate and a color steel plate, connection of the color steel plate and purlins, wall beams and the like. Because self-tapping locks through clamp force and frictional force with inside the object, receives vibrations at the object for a long time after, very easy not hard up, loses fastening, serious can lead to dangerous emergence.
Disclosure of Invention
To the problem that exists, the utility model aims at providing a self-locking self-tapping, including head and screw rod, the screw rod includes cylinder portion and tapered portion, the screw thread on cylinder portion and tapered portion surface just inclines the setting in opposite directions for the screw thread stress surface of two parts is different, thereby plays the effect of self-locking, has prevented the easy not hard up problem of self-tapping.
In order to achieve the above object, the utility model adopts the following technical scheme: a self-locking self-tapping device comprises a head and a screw, and is characterized in that: the head is of a polygonal structure, the screw comprises a cylindrical part and a conical part, a first thread part and a second thread part are sequentially arranged on the surfaces of the cylindrical part and the conical part, and the first thread part and the second thread part are obliquely arranged in opposite directions.
Preferably, a transition thread is arranged at the joint of the first thread part and the second thread part.
Preferably, the threads of the first thread part and the second thread part are both arc-shaped structures, and the transition thread threads are shell-shaped structures.
Preferably, the surface of the head is provided with a through hole.
Preferably, an inner hexagonal blind hole is formed in the head.
Preferably, a baffle is arranged between the head and the screw.
The utility model has the advantages that: (1) through the screw thread with the screw rod both sides arc setting in opposite directions for the stress surface of both sides screw thread is opposite, plays the effect of self-locking to screw rod position, has prevented the easy not hard up problem of self-tapping. (2) The transition thread of the shell-shaped structure is arranged, so that the first thread part has a transition through the second thread part, and the screw cannot be clamped. (3) The opposite through holes arranged on the surface of the head part can lead the penetrating tool to loose the self-tapping under the condition that the head part is worn.
Drawings
Fig. 1 is the schematic diagram of the whole structure of the self-tapping device of the present invention.
Fig. 2 is a left view structure diagram of the self-tapping device of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following describes the technical solution of the present invention with reference to the accompanying drawings and embodiments.
Referring to fig. 1-2, the self-locking self-tapping screw comprises a head 1 and a screw 2, wherein the head 1 is of a polygonal structure, preferably a hexagonal structure, and the self-tapping screw is screwed into an object through the matching of a wrench and the hexagonal structure. The screw rod 2 comprises a cylindrical part 21 and a conical part 22, a first thread part 201 and a second thread part 202 are sequentially arranged on the surfaces of the cylindrical part 21 and the conical part 22, the first thread part 201 and the second thread part 202 are obliquely arranged towards each other, and the first thread part 201 and the second thread part 202 are different from the contact surface of an object in a manner of oblique arrangement, so that the stress directions are different, therefore, the screw rod 2 has a self-locking effect in the object through the first thread part 201 and the second thread part 202, and the problem that the self-tapping is easy to loosen after being vibrated is solved.
Further, in order to prevent the screw 2 from being stuck in an object, the transition thread 203 is provided at the joint of the first thread part 201 and the second thread part 202, and the first thread part 201 and the second thread part 202 are inclined differently, so that the first thread part 201 is easy to stick when passing through the second thread part 202, and therefore the transition thread 203 is provided to solve the problem.
In order to further enhance the clamping force between the screw rod 2 and the object, the threads of the first thread part 201 and the second thread part 202 are both arc-shaped structures, and the structures increase the contact area between the first thread part 201 and the second thread part 202 and the inside of the object; the transition thread 203 has a shell-shaped structure, the side of the structure close to the first thread part 201 is the same arc-shaped structure, and the side close to the second thread part 202 is the same arc-shaped structure, so that the transition thread has the functions of the first thread part 201 and the second thread part 202.
Further in order to increase the loose mode of self-tapping, the surface of the head part 1 is provided with a through hole 11, and under the condition that the head part 1 of the hexagonal body structure is worn, the self-tapping can be loosened by penetrating a tool into the through hole 11, and meanwhile, the problem of damaging a matched object is solved.
Further in order to increase the auxiliary operation mode to the self-tapping, interior hexagonal blind hole 12 has been seted up in head 1, assists the screw up or not hard up operation to the self-tapping through complex hexagonal spanner, has solved originally can only through the drawback of a mode operation, has improved the life cycle of self-tapping, has saved the cost.
Further in attacking the object in order to be fast from the tapping, be equipped with baffle 3 between head 1 and the screw rod 2, overlap hexagonal spanner on the head 1 of hexagonal body structure to transversely be used in on baffle 3, the tapered portion 22 can be fast accurate penetrate the object in, improved the result of use from the tapping.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. Self-locking self-tapping comprising a head (1) and a screw (2), characterized in that: the head part (1) is of a polygonal structure, the screw (2) comprises a cylindrical part (21) and a conical part (22), a first threaded part (201) and a second threaded part (202) are sequentially arranged on the surfaces of the cylindrical part (21) and the conical part (22), and the first threaded part (201) and the second threaded part (202) are both obliquely arranged in the opposite direction.
2. A self-locking self-tapping screw as claimed in claim 1, wherein: transition threads (203) are arranged at the joint of the first thread part (201) and the second thread part (202).
3. A self-locking self-tapping screw as claimed in claim 2, wherein: the threads of the first thread part (201) and the second thread part (202) are both arc-shaped structures, and the threads of the transition thread (203) are shell-shaped structures.
4. A self-locking self-tapping screw as claimed in claim 3, wherein: the surface of the head part (1) is provided with a pair of through holes (11).
5. A self-locking self-tapping according to claim 4, wherein: an inner hexagonal blind hole (12) is formed in the head (1).
6. A self-locking self-tapping according to claim 5, wherein: a baffle (3) is arranged between the head (1) and the screw (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921679139.8U CN211039325U (en) | 2019-10-09 | 2019-10-09 | Self-locking self-tapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921679139.8U CN211039325U (en) | 2019-10-09 | 2019-10-09 | Self-locking self-tapping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211039325U true CN211039325U (en) | 2020-07-17 |
Family
ID=71564309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921679139.8U Active CN211039325U (en) | 2019-10-09 | 2019-10-09 | Self-locking self-tapping |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211039325U (en) |
-
2019
- 2019-10-09 CN CN201921679139.8U patent/CN211039325U/en active Active
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