CN2298363Y

CN2298363Y - Anti-loosing screw

Info

Publication number: CN2298363Y
Application number: CN 95239323
Authority: CN
Inventors: 高联安
Original assignee: QIANGLI VEHICLE STANDARD PARTS FACTORY ZHENJIANG CITY
Current assignee: QIANGLI VEHICLE STANDARD PARTS FACTORY ZHENJIANG CITY
Priority date: 1995-03-10
Filing date: 1995-03-10
Publication date: 1998-11-25
Anticipated expiration: 2005-03-10

Abstract

The utility model relates to a device used for tightening or fixing members, particularly is an anti-loosing screw which is composed of a screw body, screw thread on the peripheral surface, and a screw head at the end part of the screw body, wherein, the screw head can be square, hexagonal, circular and flat heads. The utility model is characterized in that at least two elastic claws collocated in radiation symmetry are arranged on the screw head; the tightening and supporting medial surfaces of the elastic claws are concave surfaces with angles cambered inwards. When used, the utility model is always in vibratory tightening connection, omitting a spring washer which needs to be padded when a plain screw is used. The utility model has the effects that the utility model saves expense, reduces process steps, improves efficiency, and has the anti-vibration and anti-loosing functions. The utility model is widely used for connecting various workpieces in the field of machinery.

Description

Backing-up screw

The utility model relates to fastening or fixed block, or the mechanical parts device, particularly a kind of screw.

In order to improve firm power, in the time of particularly on using the fastened coupling member that is being in often in the vibrations, in order to prevent to shake connecting the influence of fastening effect, having to, pad adds spring washer on fastening supporting surface in existing screw attachment, the Bolt Connection.This has just not only increased realizes the cost of connection, and has increased the complexity of assembling connection operation, thereby has reduced working efficiency.This shows, design a kind of spring washer that saves, and can realize still preventing that the screw that vibration influence connects fastening effect from being necessary.

This practical purpose is that a kind of need not the pad of design adds spring washer, still has to prevent that vibration influence from connecting the backing-up screw of effect.

The technical solution of the utility model is: a kind of by the body of screw, screw thread on the body of screw outer surface, what the screw head of body of screw end constituted is the square spigot of symmetry center with body of screw central shaft, hexagonal head, garden shape head, the backing-up screw of flat head, feature of the present utility model are that design has at least 2 to be the elastic claw of radiation center configuration with body of screw central shaft on the screw head, and the fastening supporting inner side surface of elastic claw is designed to have the concave surface of inclined angle.When the utility model is used in when fastening, its fastening supporting surface presented as the Elastic Contact as the spring washer when elastic claw was subjected to axially fastening power, prevented to shake to connecting the influence of fastening effect thereby played.

Fig. 1 is the structural representation that conforms to the utility model theme, and Fig. 2 is the schematic representation of the A of Fig. 1 to projection.

In conjunction with the accompanying drawings 1, Fig. 2 is described as follows implementation detail of the present utility model: adopt the material that is fit to make fastening or fixed component, as steel, engineering plastics, be made into the backing-up screw that the screw head 3 by the screw thread 2 on the body of screw 1, the body of screw 1 outer surface, the body of screw 1 end as shown in Figure 1 and Figure 2 constitutes through corresponding common process, feature of the present utility model is that design has at least 2 to be the elastic claw 4 of radiation symmetry center configuration with the body of screw 1 central shaft on the screw head 3, and the fastening supporting inner side surface 5 of elastic claw 4 is designed to have the concave surface of inclined angle.The backing-up screw with elastic claw of the utility model through implementing to obtain, being used in the parts that automobile, engineering truck, tractor etc. are in the vibrations often connects, facts have proved to save fully and use existing screw must fill up the spring washer that adds, simultaneously to reducing operation on the manufacturing line, improving work efficiency and played good action.

Claims

One kind what be made of the screw head (3) of the screw thread (2) on the body of screw (1), the body of screw (1) outer surface, the body of screw (1) end is square spigot, hexagonal head, garden shape head, the flat head backing-up screw of symmetry center with screw head (1) central shaft, feature of the present utility model is that the last design of screw head (3) has at least 2 to be the elastic claw (4) of radiation symmetry center configuration with the body of screw (1) central shaft, and the fastening supporting inner side surface (5) of elastic claw (4) is designed to have the concave surface of inclined angle.