CN201246386Y

CN201246386Y - Locking stud with key

Info

Publication number: CN201246386Y
Application number: CNU2008203019014U
Authority: CN
Inventors: 杨玖锡; 王建文; 许琳
Original assignee: Guizhou Aerospace Precision Products Co Ltd
Current assignee: Guizhou Aerospace Precision Products Co Ltd
Priority date: 2008-08-22
Filing date: 2008-08-22
Publication date: 2009-05-27
Anticipated expiration: 2018-08-22

Abstract

The utility model discloses a key locking stud, it includes that both ends all establish the screwed stud, and the diameter of screw one end of establishing at the stud both ends is big, the other end is little, is equipped with the keyway of symmetry on the axial of the big one end of stud diameter of screw to be equipped with the round pin key that can pull out the plug in the keyway. The utility model discloses a structure of being equipped with the keyway on stud screw in base member end is assisted being connected between stud and the base member with the round pin key, the utility model discloses not only the assembly is simple easy, can conveniently dismantle moreover, still has good relaxation performance simultaneously.

Description

A kind of band key locking stud

Technical field

The utility model relates to a kind of band key locking stud, belongs to technical field of fastening.

Background technique

Stud is a kind of fastening piece commonly used, and it is different with bolt, bolt structure, and stud does not have head, and all there is screw thread at two ends.This two-part screw thread can be isometrical, also can be waney.Stud in use, normally the screw thread of earlier that diameter is a big end is screwed into matrix; The other end and nut adapted are imbedded matrix securely in order to make stud, and the screw thread that screws in matrix one end adopts the transition fit screw thread usually.But because the precision of transition fit screw thread is high, difficulty of processing is very big, often adopts the way of apolegamy, and not only processing cost height, and assembling difficulty is controlled the bad softer matrix of material that also can damage.In order to address this problem, the person is also arranged with common Spielpassung screw thread, before assembling,, so not only can't dismantle the double thread gluing, and also loosening easily.

The model utility content:

The purpose of this utility model is: the band key locking stud that a kind of production easy to assembly, easy is provided, processing cost is low and has good anti-loosening performance, and to overcome the deficiencies in the prior art.

The utility model is to constitute like this: it comprises that two ends all are provided with the stud of screw thread, the diameter of thread one end that is located at the stud two ends is big, the other end is little, the big end of the stud diameter of thread axially on be provided with the keyway of symmetry, and in keyway, be provided with can plug pin key.

The number of above-mentioned keyway is more than 2 or 2.

Above-mentioned pin key is made up of flat key section and Three Diamond section, the height of flat key section less than keyway bottom to the perpendicular distance between the core diameter of thread, the height of Three Diamond section greater than the keyway bottom to the perpendicular distance between the core diameter of thread.

Above-mentioned keyway and pin key are interference fit.

Owing to adopted technique scheme, compared with prior art, the utility model has adopted the structure that is provided with keyway on stud is screwed into the thread section of matrix, and assist stud to be connected with assembling between the matrix with pin key, its screw thread adopts the clearance thread of common easy assembling, this not only makes assembling easily simple, but also can dismantle easily, and has a good moving performance of loosening, in addition, the utility model also has advantages such as simple in structure, highly versatile, production easily, low processing cost, using effect are good.

Description of drawings

Accompanying drawing 1 is that stud of the present utility model is connected the structural representation when using with matrix;

Accompanying drawing 2 is the structural representation of the utility model stud;

Accompanying drawing 3 is the structural representation of the utility model pin key;

Accompanying drawing 4 is the plan view of accompanying drawing 3;

Accompanying drawing 5 is analysed and observe schematic cross-section for the A Abandon place of accompanying drawing 3.

Description of reference numerals: the flat key section height of 1-stud, 2-keyway, 3-pin key, 4-matrix, t-pin key, the Three Diamond section height of T-pin key.

Embodiment

Embodiment of the present utility model: stud 1 all is made into common Spielpassung screw thread with the connecting thread of the matrix 4 that will be connected; All produce screw thread at the two ends of stud 1 in the usual way, during making the diameter of thread at stud 1 two ends is made into that an end is big, the other end is little, one end of the major thread diameter of stud 1 can be connected with the tapped hole of matrix 4, then the big end of stud 1 diameter of thread axially on produce the keyway 2 (as shown in Figure 2) that is symmetrically distributed by circumference respectively, produce simultaneously can plug in keyway 2 pin key 3; The number of keyway 2 can be made as more than 2 or 2 according to the needs that use; When making pin key 3, be made into by flat key section and Three Diamond section and form (as Fig. 3, Fig. 4 and shown in Figure 5), the height t of flat key section is made into less than keyway 2 bottoms to the perpendicular distance between this section stud 1 core diameter of thread, the height T of Three Diamond section is made into greater than keyway 2 bottoms to the perpendicular distance between this section stud 1 core diameter of thread; And keyway 2 and cooperating of pin key 3 be made into interference fit; During making, stud 1 preferably adopts the GH2132 iron-based high-temperature alloy material to make, and pin key 3 preferably adopts 1Cr18Ni9 or 1Cr18Ni9Ti stainless steel material to make, and stud 1 and pin key 3 also can adopt other material according to the needs that use.During use, the stud 1 that will have keyway 2 is screwed in the screw of matrix 4, then pin key 3 is inserted in the keyway 2, and be guiding with keyway 2, with conventional instrument pin key 3 is knocked in the connecting thread hole of stud 1 and matrix 4, can firmly stud 1 be locked in the tapped hole of matrix 4 like this and to prevent that it from taking place loosening.The other end thread section of stud 1 can need fastening parts by connections such as nuts.Because the effect of pin key 3 makes stud 1 have good anti-loosening property.The utility model can be used for the high-end product that class such as aeroengine etc. are born the vibration of repeat load.

Claims

[claim 1] a kind of band key locking stud, it comprises that two ends all are provided with the stud of screw thread (1), it is characterized in that: the diameter of thread one end that is located at stud (1) two ends is big, the other end is little, the big end of stud (1) diameter of thread axially on be provided with the keyway (2) of symmetry, and in keyway (2), be provided with can plug pin key (3).
[claim 2] band key locking according to claim 1 stud, it is characterized in that: the number of keyway (2) is more than 2 or 2.
[claim 3] band key locking according to claim 1 stud, it is characterized in that: pin key (3) is made up of flat key section and Three Diamond section, the height of flat key section (t) less than keyway (2) bottom to the perpendicular distance between the core diameter of thread, the height of Three Diamond section (T) greater than keyway (2) bottom to the perpendicular distance between the core diameter of thread.
[claim 4] band key locking according to claim 1 stud is characterized in that: keyway (2) is interference fit with pin key (3).