CN203239724U

CN203239724U - High-strength oval head screw

Info

Publication number: CN203239724U
Application number: CN 201320165970
Authority: CN
Inventors: 孙浩儿
Original assignee: NINGBO HAOBO COMMERCE CO Ltd
Current assignee: NINGBO HAOBO COMMERCE CO Ltd
Priority date: 2013-04-03
Filing date: 2013-04-03
Publication date: 2013-10-16
Anticipated expiration: 2023-04-03

Abstract

A high-strength oval head screw comprises a head part and a screw stem part connected with the head part, wherein the cross section of the head part is in an oval shape, the head part is also provided with a layer of wear plate, the cross section of the wear plate is greater than the cross section of the head part, and the head part and the screw stem part are both made of a 42CrMo material. The high-strength oval head screw is not easy to rust, convenient to mount and detach, resistant to wear and long in service life.

Description

The high strength oval head screw

Technical field:

The utility model relates to a kind of fastening piece, specifically is a kind of high strength oval head screw for boats and ships, electric power and chemical engineering industry industry.

Background technique:

At boats and ships, in the industry such as electric power and chemical engineering industry, often can use screw, usually the head of these screws is square toes or hexagon head, need to be with instrument with screw and nut screwing clamping during assembling, but, this screw is because head is hexagonal rib or Square-edge, come from the principle of node according to corrosion of metal, there is the place of corner angle to be easy to oxidized on the metal, thereby be easy in atrocious weather, corrode, cause the screw can not be for convenience detach, can only take destructive behave to remove, such as means such as gas cuttings, can cause the wasting of resources like this, effort again, and the screw head of prior art simultaneously is hexagonal rib or Square-edge, so staff may hurt because of carelessness, so still there is certain danger; And because screw head is exposed, thus collision or wearing and tearing often can be produced, so working life is lower.

The model utility content:

The technical problems to be solved in the utility model is, provides a kind of and is difficult for getting rusty, the high strength oval head screw of easy accessibility, wear-resistant and long service life.

Technical solution of the present utility model is that a kind of high strength oval head screw with following structure is provided: comprise head and screw part, wherein, the cross section of head is oval, and also is provided with one deck wear strip on the head.

High strength oval head screw described in the utility model, wherein, the cross-section area of wear strip is greater than the cross-section area of head.

High strength oval head screw described in the utility model, wherein, head and screw part are made by the 42CrMo material.

After adopting above structure, compared with prior art, the utility model high strength oval head screw has the following advantages: the cross section of screw head is done ovalisation, the head of this like this screw just not have the corner angle of protrusion, does not namely have the corrosion node, thereby so that screw head be not easy to get rusty, prolonged the working life of screw, and because the screw head cross section is done ovalisation, so can not hurt hand when the workman operates, Safety performance is higher; And at wear strip of head installation, so that the wear-resisting effect of whole screw is better, working life is longer like this.

The wear strip cross-section area is greater than the cross-section area of head, so just can allow the whole screw head that blocks of wear strip, can make so the wear-resisting better effects if of whole screw.

The head and the screw part that adopt the 42CrMo material to make can make the intensity of whole screw higher.

Description of drawings:

Fig. 1 is the main TV structure schematic representation of the utility model high strength oval head screw;

Fig. 2 is the section structure for amplifying schematic representation of edge " A-A " line among Fig. 1.

Embodiment:

Below in conjunction with the drawings and specific embodiments the utility model high strength oval head screw is described in further detail:

As depicted in figs. 1 and 2, in this embodiment, the utility model high strength oval head screw comprises head 1 and screw part 2, the cross section of head 1 is oval, and also be provided with one deck wear strip 3 on the head 1, the cross-section area of wear strip 3 is greater than the cross-section area of head 1, and head 1 and screw part 2 are made by the 42CrMo Steel material.

Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.

Claims

1. a high strength oval head screw comprises head (1) and screw part (2), it is characterized in that: the cross section of described head (1) is ellipse, and also is provided with one deck wear strip (3) on the head (1).

2. high strength oval head screw according to claim 1, it is characterized in that: the cross-section area of described wear strip (3) is greater than the cross-section area of described head (1).

3. high strength oval head screw according to claim 1 and 2, it is characterized in that: described head (1) and screw part (2) are made by the 42CrMo material.