CN210050184U

CN210050184U - Screw with multiple spiral convex edges

Info

Publication number: CN210050184U
Application number: CN201920910769.5U
Authority: CN
Inventors: 董秀山
Original assignee: Shandong Shanze Industry And Trade Co Ltd
Current assignee: Shandong Shanze Industry And Trade Co Ltd
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-02-11
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a take screw of many heliciform beads, including screwhead and screw rod, the screw rod includes the body of rod at middle part and sets up the screw thread on the body of rod, a plurality of heliciform beads have on the screw rod, the body of rod cross-section is the path cross-section, screw rod cross-section is big footpath cross-section, and this big footpath cross-section is regular polygon, and regular polygon's angular form the bead. The utility model discloses a screw is owing to have a plurality of spiral helicine beads, and consequently the path cross-section of its screw rod is bigger than the cross-section with the specification, therefore has higher tensile strength, because screw thread and internal thread area of contact are great, consequently has higher threaded connection intensity.

Description

Screw with multiple spiral convex edges

Technical Field

The utility model relates to a screw field, concretely relates to take screw of many heliciform beads.

Background

Screws are a common fastener and are widely used in machinery, electrical appliances and buildings. Generally, the material is metal or plastic, and is cylindrical, and the grooves with the concave and convex surfaces are called as screw threads.

The prior art screws consist of a recessed screw head and a threaded screw shaft.

Disclosure of Invention

An object of the utility model is to provide a pair of take screw of many heliciform beads to it attacks nature and locking nature to strengthen it.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a take screw of many heliciform beads, including screwhead and screw rod, the screw rod includes the body of rod at middle part and sets up the screw thread on the body of rod, a plurality of heliciform beads have on the screw rod, the body of rod cross-section is the path cross-section, screw rod cross-section is big footpath cross-section, and this big footpath cross-section is regular polygon, and regular polygon's angular form the bead.

Preferably, the corners of the regular polygon have a rounded transition.

Preferably, the sides of the regular polygon are straight.

Preferably, the small diameter section is circular.

Preferably, the small-diameter section is a regular polygon.

Preferably, the end of the shaft has a tapered section with a large diameter and a tapered section with a small diameter.

Preferably, the teeth of the thread have tips, the thread is a circle of thread along the circumferential circle of the rod body, the tips of the teeth at one end face one side and the tips of the teeth at the other end face the other side on the circle of thread.

The utility model has the advantages that:

the utility model discloses a screw is owing to have a plurality of spiral helicine beads, and consequently the path cross-section of its screw rod is bigger than the cross-section with the specification, therefore has higher tensile strength, because screw thread and internal thread area of contact are great, consequently has higher threaded connection intensity.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the screw head of the screw with multiple spiral ribs according to the present invention;

FIG. 2 is a schematic view of a screw with multiple helical ribs according to the present invention;

FIG. 3 is a view from the direction of FIG. 2A-A;

FIG. 4 is a schematic view of a half-cycle thread configuration.

Description of reference numerals:

a screw head 1; a cross slot 11;

a screw shaft 2; a large-diameter section 21; a small-diameter section 22; a rib 23; an arc 24; the teeth 25; a tip 26.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Example 1

The embodiment discloses a screw with multiple spiral ridges 23, which comprises a screw head 1 and a screw rod 2.

Fig. 1 shows a screw head 1 of the present embodiment, which is of the type: JMP M4.0 with a cross slot 11.

Fig. 2 shows the screw of the present embodiment, the length of the screw shaft 2 is 12mm, and the model: m4 x 0.7, C value 3.98-4.13, D value 3.76-3.86.

The screw rod 2 comprises a rod body at the middle part, and threads are arranged on the rod body. The screw shaft 2 has a plurality of helical ribs 23. As shown in FIG. 3, the cross-section of the shank is a small diameter section 22, the cross-section of the screw shank 2 is a large diameter section 21, the large diameter section 21 is a regular polygon, and the corners of the regular polygon form the ribs 23. Because the periphery of the teeth 25 of the screw thread is not circular, after the screw is tapped into the plate, the plate is deformed and is tightly attached to the tooth shape of the teeth 25. When the screw tends to loosen, the end part of the tooth 25 is subjected to the resistance of the plate material to prevent the loosening. The corners of the regular polygon have a radius 24 transition to facilitate machining and for ease of attack. The sides of the regular polygon are straight, so that the looseness prevention performance is improved. The screw of the present embodiment has a large tensile strength because the small-diameter cross section 22 of the screw shaft 2 is larger than the cross section of the same specification because of the plurality of spiral ridges 23, and a high screw connection strength because the contact area between the screw thread and the female screw thread is large.

Advantageously, the section 22 of small diameter is circular or regular polygonal. For ease of processing, the regular polygon is congruent with the regular polygon of the major diameter section 21. For ease of use, the end major and

minor diameter sections

21, 22 of the shaft 2 are tapered, i.e. the end portion of the shaft 2 is tapered.

Preferably, the teeth 25 of the thread have a tip 26, and the thread is a circle of thread along the circumferential direction of the rod body, wherein the tip 26 of one end of the teeth 25 faces one side and the tip 26 of the other end of the teeth 25 faces the other side. As shown in fig. 4, the upper teeth 25 are inclined to the right, the lower teeth 25 are inclined to the left, and the tip 26 of the teeth 25 between the two ends is gradually inclined to the left from the right. That is, on a week screw thread, the partial direction of tooth 25 is different to make the screw after attacking the board, because board self deformation, panel and tooth 25 profile of tooth closely laminate, when the screw had not hard up trend, tooth 25 side can receive the resistance of panel, therefore more has locking nature.

Screw parameters of the present embodiment: surface hardness: hv450 min; core hardness: hv 200-400; breaking torsion: cm, 65 kgf.min.

The screw of the embodiment is formed by rolling a corrugated washboard which is waved in the longitudinal direction and a cylindrical blank. While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. Take screw of many heliciform beads, including screwhead and screw rod, the screw rod includes the body of rod at middle part and sets up the screw thread on the body of rod, its characterized in that, a plurality of heliciform beads have on the screw rod, the body of rod cross-section is the path cross-section, the screw rod cross-section is big footpath cross-section, and this big footpath cross-section is regular polygon, and regular polygon's angular form is the bead.

2. The screw with multiple helical ridges of claim 1, wherein the corners of said regular polygon have rounded transitions.

3. The screw with multiple helical ridges of claim 1, wherein the sides of said regular polygon are straight.

4. The screw of claim 1, wherein the minor diameter is circular in cross-section.

5. The screw of claim 1, wherein the minor diameter is a regular polygon in cross-section.

6. The screw of claim 1, wherein the shank has end portions with a tapered larger and smaller cross-sections.

7. The screw of claim 1, wherein the teeth of the thread have tips, and the thread is formed in one turn along the circumference of the shank, and the tips of the teeth of one end face one side and the tips of the teeth of the other end face the other side of the one turn.