CN218542859U - Fastening screw for assembling plastic part product - Google Patents
Fastening screw for assembling plastic part product Download PDFInfo
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- CN218542859U CN218542859U CN202222384416.0U CN202222384416U CN218542859U CN 218542859 U CN218542859 U CN 218542859U CN 202222384416 U CN202222384416 U CN 202222384416U CN 218542859 U CN218542859 U CN 218542859U
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- screw
- rod
- rod body
- fastening screw
- assembly
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- 239000004033 plastic Substances 0.000 title claims abstract description 29
- 229920003023 plastic Polymers 0.000 title claims abstract description 29
- 238000010079 rubber tapping Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 230000002401 inhibitory effect Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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Abstract
A fastening screw for assembling plastic products comprises a screw rod, wherein the screw rod comprises a rod body, a thread arranged on the rod body, and at least one row of notch groups arranged on the thread. The shape formed by the contour line of the thread on the section along the central axis of the rod body is an isosceles trapezoid. The notch group comprises a plurality of notches, and the arrangement direction of the plurality of notches is parallel to the central axis of the rod body. The shape formed by the contour line of the notch on the section perpendicular to the central axis of the rod body is an isosceles triangle. The gap groups are arranged at equal intervals and angles by taking the central shaft of the rod body as the center. In the fastening process, the screw is tightly attached to the internal thread in the prefabricated hole of the accessory assembly through the isosceles trapezoid-shaped screw threads, the screw is not easy to loosen, and the opening group can effectively cut plastic to prevent the accessory from expanding and cracking when tapping the internal thread of the prefabricated hole.
Description
Technical Field
The utility model relates to a fastener technical field, in particular to a fastening screw for plastic parts goods assembly.
Background
In the prior art, screws used for plastic assembly are generally self-tapping screws having a certain thread angle. The self-tapping screws are assembled by tapping internal threads matched with the self-tapping screws in the prefabricated holes by utilizing the self-tapping screw structures. The main problems of the existing tapping screw in the assembling process are as follows: thereby the screw easily bursts plastics and leads to the accessory to damage when attacking the internal thread, and simultaneously after the assembly of accessory is accomplished, thereby the screw thread easily withdraws from the accessory along the internal thread in the prefabricated hole and leads to the accessory to connect the steadiness poor. The main reason for the above problem is that the cross section of the thread of the conventional screw is perpendicular to the screw of the screw, and the cross section of the thread is triangular, so that the tapping screw is loosened and even dropped due to long-term use or vibration after the plastic part is assembled.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a fastening screw for plastic product assembly that can solve the above problems.
A fastening screw for the assembly of plastic articles comprises a threaded rod. The screw comprises a rod body, a screw tooth arranged on the rod body and at least one row of opening groups arranged on the screw tooth. The contour line of the thread on the section along the central axis of the rod body is in an isosceles trapezoid shape, and the height of the isosceles trapezoid shape is vertical to the central axis of the rod body. And the gap group comprises a plurality of gaps, and the arrangement direction of the plurality of gaps is parallel to the central axis of the rod body. The shape formed by the contour line of the opening on the section perpendicular to the central axis of the rod body is an isosceles triangle, and the height of the isosceles triangle is perpendicular to the central axis of the rod body.
Further, the fastening screw for assembling the plastic product also comprises a head part arranged at one end of the screw rod.
Further, a driving groove is arranged on the head.
Further, the other end of the rod body opposite to the head is provided with a guide-in part.
Further, the introduction portion is frustum-shaped.
Furthermore, four rows of opening groups are arranged on the screw teeth, and each opening group comprises a plurality of openings.
Furthermore, the contour line of the notch on the section perpendicular to the central axis of the rod body is in the shape of an isosceles triangle, and the isosceles triangle is perpendicular to the central axis of the rod body.
Furthermore, the gap groups are arranged at equal intervals and angles by taking the central axis of the rod body as a central axis.
Compared with the prior art, the utility model provides an among the fastening screw for plastic parts goods assembly, through the cross sectional shape to its screw tooth and the design of direction make when this fastening screw twists in goods difficult not hard up, improved stability. Specifically, the shape formed by the contour line of the thread on the section along the central axis of the rod body is an isosceles trapezoid, so that the force applied to two side surfaces of the isosceles trapezoid is the same as or opposite to the direction of the force of the fastening screw withdrawing from the product, and the force is the same in size, so that the force received by all the fastening screws withdrawing from the product can be offset, and the fastening screws are not easy to loosen. Meanwhile, the cross section of the screw tooth is perpendicular to the radial direction of the rod body, so that the product is easy to burst when the product is screwed in, and at least one row of notch groups are arranged on the screw tooth and comprise a plurality of notches. The gap is used for cutting the product when the fastening screw is screwed in, so that the product can be prevented from being cracked and damaged when the fastening screw is screwed in.
Drawings
Fig. 1 is a schematic structural view of a fastening screw for plastic product assembly according to the present invention.
Figure 2 is a schematic cross-sectional view of the fastening screw for plastic article assembly of figure 1 taken parallel to the central axis of the threaded rod.
Fig. 3 is a schematic cross-sectional view of the fastening screw for plastic article assembly of fig. 1, taken perpendicular to the central axis of the screw shaft.
Detailed Description
Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.
As shown in fig. 1 to 3, it is a schematic structural diagram of a fastening screw for plastic product assembly according to the present invention. The fastening screw for assembling the plastic product comprises a head part and a screw rod 20 connected with the head part 10. It is contemplated that the fastening screw may also include other functional structures, such as rust-inhibiting coatings, rust-inhibiting oils, etc., which are known to those skilled in the art and will not be described herein.
The head 10 is vertically disposed at one end of the screw 20. The head 10 has a disk shape, and a central axis of the head 10 and a central axis of the screw 20 coincide with each other. During the assembly of the fitting, the head 10 is turned by a tool, and the head 10 is connected with the screw rod 20 to rotate, so that the screw rod 20 is rotated to tap the corresponding internal thread in the prefabricated hole of the fitting to complete the assembly. It is also conceivable that the head 10 is provided with a drive slot 11 for cooperation with a drive tool. The driving groove 11 may be cross-shaped, hexagonal, quincunx, etc., which may be designed according to actual requirements. In the present embodiment, the driving groove 11 has a cross shape.
The screw 20 comprises a rod body 21 fixedly connected to the head 10, a thread 22 arranged on the side wall of the rod body 21, and at least one row of notch groups 23 arranged on the thread 22. The screw 20 is cylindrical. The rod body 21 is vertically arranged on the central axis of the head 10. The screw thread 22 is spirally disposed outside the rod body 21. How to manufacture the thread 22 is prior art and will not be described in detail herein. The pitch, the elevation angle, etc. of the thread 22 can be designed according to the actual requirements, and will not be described in detail here. The shape formed by the contour line of the thread 22 on the section along the central axis of the rod body 21 is an isosceles trapezoid, and the height of the isosceles trapezoid is perpendicular to the central axis of the rod body 21, that is, the cross section of the thread 22 is perpendicular to the radial direction of the rod body 21. Because the shape formed by the contour line of the screw teeth 22 on the section along the central axis of the rod body 21 is an isosceles trapezoid, that is, the cross section of the screw teeth 22 is perpendicular to the radial direction of the rod body 21, the force applied to the two side surfaces of the isosceles trapezoid is the same as and opposite to the force applied to the fastening screw to withdraw from the product, and the force is the same in size, so that the force applied to all the fastening screws when withdrawing from the product can be counteracted, and the fastening screw is not easy to loosen. Compared with the thread of the existing screw, the thread is triangular, and the cross section of the triangle is perpendicular to the spiral of the thread, namely, the cross section of the triangle forms an included angle with the central axis of the rod body 21, so when the screw is subjected to an external force for driving the screw to exit the product, the force applied to two surfaces of the triangle is decomposed into a force parallel to the radial direction of the rod body 21 and a force perpendicular to the radial direction of the rod body 21, and therefore the force perpendicular to the radial direction of the rod body 21 is smaller than the external force for driving the screw to exit the product, and the screw can exit the product.
The number of rows of the gap groups 23 is at least one, and the gap groups can be arranged according to actual requirements, such as the diameter of the rod body 21. In this embodiment, the screw thread 22 is provided with four rows of the notch groups 23, and the four rows of the notch groups 23 are arranged at equal intervals and angles with the central axis of the rod 21 as the central axis.
Each row of the gap group 23 includes a plurality of gaps 231, and the arrangement direction of the plurality of gaps 231 is parallel to the central axis of the rod 21. The gap group 30 is perpendicular to the central axis of the rod body 21. The contour line of the notch group 30 on the cross section perpendicular to the central axis of the rod body 21 is an isosceles triangle, and the height of the isosceles triangle is perpendicular to the central axis of the rod body 21. The notch group 30 is provided with four rows, and the notch groups 30 are arranged at equal intervals and angles around the central axis of the rod body 21, the design of the notch group 30 enables a screw to effectively cut plastics when the screw is used for self-tapping in a prefabricated hole of a plastic part, and prevents the plastic part from being burst and damaged when being assembled, specifically, the cross section of the screw thread 22 is perpendicular to the radial direction of the rod body 21, so that the cross section of the screw thread 22 is not perpendicular to the spiral line of the screw thread when the product is screwed in, the product is easy to burst, and the notch 231 needs to be designed to cut the product during the screwing in process, so that the product can be prevented from being burst and cracked when the product is screwed in.
The other end of the rod body 21 opposite to the head 10 is also provided with an introduction portion 40. The introduction portion 40 may have a truncated cone shape or a tapered tip shape. The central axis of the introduction portion 24 coincides with the central axis of the rod body 21, and is used for being inserted into a prepared hole of the product in advance at the initial stage of screwing in the fastening screw.
Compared with the prior art, in the utility model provides an among the fastening screw for plastic parts goods assembly, through right the cross sectional shape of thread 22 and the design of direction make when this fastening screw twists in the goods difficult not hard up, improved stability. Specifically, the contour line of the thread 22 on the cross section along the central axis of the rod body 21 is in the shape of an isosceles trapezoid, so that the force applied to the two side surfaces of the isosceles trapezoid is the same as or opposite to the force applied to the fastening screw to withdraw from the product, and the force is the same in size, so that the force applied to all the fastening screws to withdraw from the product can be offset, and the fastening screws are not easy to loosen. Meanwhile, since the cross section of the screw thread 22 is perpendicular to the radial direction of the rod body 21, the product is easily cracked when the product is screwed in, so that the screw thread 22 is provided with the at least one row of notch groups 23, and the notch groups 23 include a plurality of notches 231. The gap 231 is intended to cut the product when the fastening screw is screwed in, so that the product is prevented from being damaged by the fastening screw which cracks the product when screwed in.
The above description is only for the preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention, and any modification, equivalent replacement or improvement within the spirit of the present invention is encompassed by the claims of the present invention.
Claims (7)
1. A fastening screw for the assembly of plastic articles, comprising a threaded rod, characterized in that: the screw rod includes a body of rod, and a setting is in screw tooth on the body of rod to and at least one row sets up opening group on the screw tooth, the screw tooth is following the shape that the outline line formed on the cross-section of the center pin of the body of rod is isosceles trapezoid, and equal trapezoidal high perpendicular to of waist the center pin of the body of rod, one row opening group includes a plurality of openings, and is a plurality of the array orientation of opening is on a parallel with the center pin of the body of rod, the opening is at the perpendicular to the shape that the outline line formed on the cross-section of the center pin of the body of rod is isosceles triangle, and equal isosceles triangle's high perpendicular to the center pin of the body of rod.
2. A fastening screw for the assembly of a plastic article as defined in claim 1, wherein: the fastening screw for assembling the plastic product further comprises a head arranged at one end of the screw rod.
3. A fastening screw for the assembly of a plastic article as defined in claim 2, wherein: the head is provided with a driving groove.
4. A fastening screw for the assembly of plastic articles as claimed in claim 2, wherein: the other end of the rod body opposite to the head is provided with a leading-in part.
5. The fastening screw for assembly of a plastic article of claim 4, wherein: the leading-in part is frustum-shaped.
6. A fastening screw for the assembly of a plastic article as defined in claim 1, wherein: four rows of opening groups are arranged on the screw teeth.
7. The fastening screw for the assembly of a plastic article of claim 6, wherein: the gap groups are arranged at equal intervals and angles by taking the central shaft of the rod body as a central shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222384416.0U CN218542859U (en) | 2022-09-07 | 2022-09-07 | Fastening screw for assembling plastic part product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222384416.0U CN218542859U (en) | 2022-09-07 | 2022-09-07 | Fastening screw for assembling plastic part product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218542859U true CN218542859U (en) | 2023-02-28 |
Family
ID=85272765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222384416.0U Active CN218542859U (en) | 2022-09-07 | 2022-09-07 | Fastening screw for assembling plastic part product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218542859U (en) |
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2022
- 2022-09-07 CN CN202222384416.0U patent/CN218542859U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A fastening screw for the assembly of plastic products Effective date of registration: 20230908 Granted publication date: 20230228 Pledgee: Zhejiang Jiashan rural commercial bank Limited by Share Ltd. science and technology sub branch Pledgor: JIAXING HANGONG AUTOMOBILE FASTENER CO.,LTD. Registration number: Y2023330002002 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CP03 | Change of name, title or address |
Address after: 314100 Building 2, 99 Lingxiu Branch Road, Luoxing street, Jiashan County, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Hangong Intelligent Industry Co.,Ltd. Country or region after: China Address before: 314100 Building 2, 99 Lingxiu Branch Road, Luoxing street, Jiashan County, Jiaxing City, Zhejiang Province Patentee before: JIAXING HANGONG AUTOMOBILE FASTENER CO.,LTD. Country or region before: China |