CN202056159U

CN202056159U - Bolt for construction project

Info

Publication number: CN202056159U
Application number: CN201120059404XU
Authority: CN
Inventors: 孙浩儿
Original assignee: NINGBO HAOBO COMMERCE CO Ltd
Current assignee: NINGBO HAOBO COMMERCE CO Ltd
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2011-11-30
Anticipated expiration: 2021-03-03

Abstract

The utility model discloses a bolt for a construction project. The bolt includes a threaded rod(1), a polished rod (3) and a head part (4) which are sequentially integrated, wherein the cross section of the head part (4) adopts a geometrical shape formed by a straight line (6) and a major arc (7). By adopting the structure, as the head part of the bolt is formed by axially cutting off a part of a cylinder through a plane surface, and so long as the bolt is arranged in the required position, and the other end of the bolt is screwed with a nut through a spanner under the spacing action of the plane surface, the bolt is mounted; and as no projecting edge is formed at the cylindrical head part of the bolt, no rusting joint is formed, the head part of the bolt is not that easy to rust, the service life of the bolt is prolonged, the spanner dismounting is facilitated, destructive measures for dismounting are avoided, resource waste is avoided, and dismounting is time-saving and labor-saving.

Description

The bolt that is used for construction project

Technical field

The utility model relates to fastener areas, specifically is a kind of bolt that is used for construction project that is applicable to open-air engineerings such as train, boats and ships, Mars Miner, dump car.

Background technique

In capital construction engineerings such as highway, harbour, railway, often can use bolt, these bolts are hexagon head or square toes usually, need hexagon wrench or square spanner during assembling, and bolts and nuts are tightened.But, this bolt 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 be caught oxidation on the metal, thereby is easy to be eroded, cause bolt not screw out by spanner by severse weather, can only take destructive behave to remove, as means such as gas cuttings, can cause the wasting of resources like this, take time and effort again simultaneously.

The model utility content

Technical problem to be solved in the utility model is, a kind of bolt that is used for construction project of getting rusty, can increasing the service life of being difficult for is provided.

For solving the problems of the technologies described above, the bolt that is used for construction project that the utility model provides comprises the threaded stem, polished rod and the head that are connected as a single entity successively, being shaped as by straight line and the geometrical shape that major arc is formed of the cross section of described head.

After adopting above structure, the utility model compared with prior art, has following advantage: because the shape of the head cross section of bolt is made up of straight line and one section major arc, in other words, the head of bolt be on columniform basis with a planar axes to cutting away a part, like this, bolt is placed on required position, utilizes the position-limiting action on plane, use the spanner nut of screwing at the other end of bolt, can finish the installation of bolt, therefore, the corner angle that this cylindrical bolt head does not protrude just do not have the corrosion node, thereby bolt head is not easy to get rusty, can prolong the working life of bolt, convenient simultaneously with the spanner dismounting, avoid adopting destructive behave to remove, just can not cause the waste of resource, dismounting is time saving and energy saving.

As improvement, the length of described straight line is not less than the diameter of the threaded stem of bolt, and straight line is not less than the radius of the polished rod of bolt to the distance in the major arc center of circle.After adopting this structure, make the plane of bolt head can satisfy spacing requirement, can not be corrupted to bolt itself again, processing is control better, produces simpler.

As further improvement, the ratio of the diameter of described head and the diameter of threaded stem was more than or equal to 1.5: 1.Wherein optimal proportion is that the ratio of the diameter of the diameter of described head and threaded stem equals 1.5: 1.After adopting this structure, make bolt head can satisfy stressed requirement, waste material is not more optimized resource again.

As further improving, the joint of described threaded stem and polished rod has circular groove.Adopt this structure, be because bolt is easy to damaged screw after repeated disassembled and assembled, after having designed circular groove, this circular groove has played the effect of oil impregnate, lubricant oil can flow to the tooth that each is in contact with one another by circular groove, so both reduced the friction between double-screw bolt and the supporting nut thread, simultaneously also leicht fallen D/A in nutting.

Description of drawings

Fig. 1 is the main TV structure schematic representation of the utility model bolt of being used for construction project;

Fig. 2 is the sectional structure schematic representation of A-A direction among Fig. 1.

Wherein, 1, threaded stem; 2, circular groove; 3, polished rod; 4, head; 5, plane; 6, straight line; 7, major arc.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.

Be used for by the utility model illustrated in figures 1 and 2 construction project bolt structural representation as can be known, it comprises threaded stem 1, polished rod 3 and the head 4 that is connected as a single entity successively, being shaped as by straight line 6 and the geometrical shape that major arc 7 is formed of the cross section of described head 4.The length of described straight line 6 is not less than the diameter of the threaded stem 1 of bolt, and straight line 6 is not less than the radius of the polished rod 3 of bolt to the distance in major arc 7 centers of circle.

The ratio of the diameter of the diameter of described head 4 and threaded stem 1 was more than or equal to 1.5: 1.In the present embodiment, the ratio of the diameter of the diameter of described head 4 and threaded stem 1 equals 1.5: 1.

Described threaded stem 1 has circular groove 2 with the joint of polished rod 3.

The utility model inserts needed position with bolt in use, utilize the plane positioning of bolt head after, get final product at the other end threaded end of the bolt nut of screwing on.

Claims

1. bolt that is used for construction project, comprise the threaded stem (1), polished rod (3) and the head (4) that are connected as a single entity successively, it is characterized in that: the cross section of described head (4) be shaped as the geometrical shape of forming by a straight line (6) and a major arc (7).

2. the bolt that is used for construction project according to claim 1, it is characterized in that: the length of described straight line (6) is not less than the diameter of the threaded stem (1) of bolt, and straight line (6) is not less than the radius of the polished rod (3) of bolt to the distance in major arc (7) center of circle.

3. the bolt that is used for construction project according to claim 1 is characterized in that: the ratio of the diameter of the diameter of described head (4) and threaded stem (1) was more than or equal to 1.5: 1.

4. the bolt that is used for construction project according to claim 3 is characterized in that: the ratio of the diameter of the diameter of described head (4) and threaded stem (1) equals 1.5: 1.

5. the bolt that is used for construction project according to claim 1 is characterized in that: described threaded stem (1) has circular groove (2) with the joint of polished rod (3).