CN203223450U

CN203223450U - Fastening connection structure

Info

Publication number: CN203223450U
Application number: CN 201320098781
Authority: CN
Inventors: 陈永凯; 陈鹏飞; 康玉燕; 吴武华; 韩京梅
Original assignee: Beijing Research Institute of Mechanical and Electrical Technology
Current assignee: Beijing Research Institute of Mechanical and Electrical Technology
Priority date: 2013-03-05
Filing date: 2013-03-05
Publication date: 2013-10-02
Anticipated expiration: 2023-03-05

Abstract

The utility model provides a fastening connection structure, which comprises a connected object I , a connected object II, a double-head threaded shaft and a self-locking nut, wherein the double-head threaded shaft is provided with an annular shaft shoulder structure in the middle, the to-be-connected end face of the connected object I is provided with a shaft shoulder installation surface, and when the connection object I and the connected object II are connected in a fastening way, the annular shaft structure is tightly pressed in a shaft shoulder installation slot. By adopting the shaft shoulder structure, pre-tightening force can be produced due to effects between the shaft shoulder and the shaft shoulder installation surface of the connected object, fastening without loosening between a threaded shaft and the connected object can be ensured, and the fastening connection structure is suitable for narrow operating space, operating space with poor openness or certain conditions.

Description

A kind of fastening structure

Technical field

The utility model relates to a kind of fastening structure, belongs to field of mechanical technique.

Background technique

The linkage structure of bolt+nut is adopted in connection between a plurality of objects usually, and is locking, fastening by spring washer or self-locking nut.This linkage structure is simple, reliable, under the good situation of operating space opening character, often adopts.But under the situation narrow and small in the operating space, that opening character is bad, need many objects reliably are fastenedly connected, the linkage structure of bolt+nut will be restricted.

The model utility content

The purpose of this utility model is to overcome the prior art deficiency, and a kind of fastening structure that operating space restriction, opening character are good, can produce pretightening force that is not subjected to is provided.

Technical solution of the present utility model: a kind of fastening structure, comprise and be connected object I, be connected object II, double thread screw axle and self-locking nut, described double thread screw axle is in middle part processing ring-type shaft shoulder structure, be connected object I end face processing to be connected shaft shoulder attachment face, be connected object I and be connected object II when being fastenedly connected, ring-type shaft shoulder structure and shaft shoulder mounting groove compress.

The utility model beneficial effect compared with prior art:

(1) the utility model adopts shaft shoulder structural type, by the shaft shoulder and the effect that is connected the shaft shoulder attachment face of object, produce pretightening force, guarantee thread spindle and be connected between the object fastening, do not get loose, be applicable to that the operating space is narrow and small, opening character is bad or some specific situation;

(2) the utility model adopts shaft shoulder structural type, by the pretightening force effect of the shaft shoulder, when the dismounting self-locking nut, can prevent from thread spindle and be connected between the object getting loose;

(3) the utility model adopts shaft shoulder structural type, by the positioning action of the shaft shoulder, can guarantee the mounting point unanimity of thread spindle.

Description of drawings

Fig. 1 is the utility model overall structure schematic representation;

Fig. 2 is the utility model connection part partial schematic diagram;

Fig. 3 is the utility model double thread screw axle construction schematic representation.

Embodiment

Below in conjunction with accompanying drawing and instantiation the utility model is elaborated.

The utility model is connected object I1, is connected object II2, double thread screw axle 3, plain washer 4, self-locking nut 5 as shown in Figure 1.

Double thread screw axle 3 as shown in Figure 3, tool application of force mouth 10 is revolved in the processing of middle part processing ring-type shaft shoulder structure 9, one end end faces; Be connected object I1 as shown in Figure 2, thread mill drilling 7 is at end face processing shaft shoulder attachment face 6 to be connected; Be connected object II2 as shown in Figure 2, processing through hole 8.

As shown in Figure 1, double thread screw axle 3 connects by the tapped hole 7 that is connected object I1, use torque spanner by revolving the pre-fastening moment rotation double thread screw axle 3 that tool application of force mouth 10 applies to be needed, make double thread screw 3 and be connected between the object I1 to produce installation pretightening force realization double thread screw axle 3 and be connected locking, the purpose that is fastenedly connected between the object I1 by ring-type shaft shoulder structure 9 and shaft shoulder attachment face 6 effect that is connected object I1; The through hole 8 that is connected object II2 passes double thread screw axle 3; be connected the attachment face of object II2 with plain washer 4 protections; apply the moment that needs with torque spanner and tighten self-locking nut 5, realize being connected object I1 and be connected between the object II2 locking, be fastenedly connected.

The unspecified part of the utility model is technology as well known to those skilled in the art.

Claims

1. fastening structure, comprise be connected object I (1), be connected object II (2), double thread screw axle (3) and self-locking nut (5), it is characterized in that: described double thread screw axle (3) is in middle part processing ring-type shaft shoulder structure (9), be connected object I (1) end face processing to be connected shaft shoulder attachment face (6), be connected object I (1) and be connected object II (2) when being fastenedly connected, ring-type shaft shoulder structure (9) compresses with shaft shoulder mounting groove (6).