CN2138671Y

CN2138671Y - Dowel-free connection device for net frame structure

Info

Publication number: CN2138671Y
Application number: CN 92234561
Authority: CN
Inventors: 马又华
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-10
Filing date: 1992-10-10
Publication date: 1993-07-21
Anticipated expiration: 2002-10-10

Abstract

The utility model relates to a dowel-free connection device for a net frame structure. A steel screw bolt ball is provided with a threaded hole, the interior of the threaded hole is provided with a high-strength screw bolt which is provided with a cylindrical bush and a sealing plate, the screw bolt is also provided with a lug boss which is matched with a concave groove on the bush, and the screw bolt is coated with a circle of fluorescent circle. A notch of the bush can be used for checking whether the screw bolt is in position, and the interior of the bush is provided with a disconnection preventing ring which can prevent the bush from disconnecting from the screw bolt. The utility model can enhance construction speed and connection strength, and can be manufactured easily.

Description

Dowel-free connection device for net frame structure

The utility model relates to the no pin linkage of a kind of space truss structure, belongs to the technical field of the connector of construction industry space truss structure.

Space truss structure is generally being used aspect roof system and the floor, usually its rod member all is connected with spheroid, its bolted spherical node of existing connected mode is all by the bolt steel ball, pin, sleeve, part such as conehead or shrouding etc. are in addition formed, be specially adapted to connect steel tube member bar, when the effect of pin just is to use spanner to tighten sleeve, bolt is screwed in the screwed hole of steel ball, thereby play the effect that connects steel ball and rod member, its shortcoming just is will hole on bolt or process keyway, the load cross section is reduced, also produce the stress concentration phenomenon, cause the bolt supporting capacity to descend, and pin has only the size of M6, be easy to fracture, change pin or take out the pin that fractures all time-consuming from bolt, take a lot of work, influence speed of application.

The purpose of this utility model is a space truss structure that a kind of novelty will be provided with no pin linkage, it can not make pin also needn't be on bolt machining hole or keyway, can overcome above-mentioned shortcoming.

The purpose of this utility model is to realize like this, the high-strength bolt of in the screwed hole of Steel Bolt ball, packing into, shank of bolt has boss to match with groove in the cylindrical sleeve endoporus on one's body, and bolt scribbles a circle fluorescent paint, and barrel end is jagged, whether can detect the bolt connection thus puts in place, shrouding also is housed on the bolt, and shrouding is integrally welded with rod tube again, and the sleeve endoporus has cannelure, the anti-decylization of packing into can not split away off sleeve from bolt when transportation.

Fig. 1 space truss structure schematic diagram of no pin linkage

The A-A sectional view of Fig. 2 accompanying drawing 1

The elevation of Fig. 3 sleeve

The lateral view of Fig. 4 sleeve

Now in conjunction with the accompanying drawings the structure of space truss structure with no pin linkage is described in detail.

By Fig. 1, the bolt sphere of steel has screwed hole on (1), the high-intensity bolt (2) of packing in the hole, the screw portion of bolt (2) is equipped with cylindrical sleeve (3), on sleeve (3) inner hole wall cannelure (11) is arranged, anti-decylization (6) is housed in the groove, it makes unlikely and sleeve (3) disengaging of bolt (2) during carrying, the boss (7) of sleeve (3) endoporus groove (8) and bolt (2), turn sleeve (3), dependence boss (7) cooperates with groove (8), and bolt (2) is screwed in the screwed hole of bolt sphere (1).On sleeve (3) the left end end face jagged (9), be coated with a circle fluorescent coating (10) on the bolt (2), when being screwed into spiral shell, smashs when putting in place by bolt (2), can demonstrate the fluorescent circle from the breach (9) of sleeve (3), this is convenient to check whether bolt puts in place, go back a shrouding of suit (4) on the bolt, the right-hand member end face of shrouding (4) and rod tube (5) are integrally welded.

Fig. 2 is the A-A sectional view of accompanying drawing 1, on the inner hole wall of sleeve (3) fluted (8), axial boss (7) is arranged on the shaft of bolt (2), and boss (7) matches with groove (8).

Fig. 3 is the schematic diagram of sleeve, and the left end of cylindrical sleeve (3) has cross breach (9), and axial notch (8) and toroidal cavity radially (11) are arranged again in its endoporus.

Fig. 4 is the lateral view of sleeve, sleeve (3) end jagged (9), endoporus fluted (8).

Original sleeve is a hexagon, no matter is rolling or forges and be processed into hexagon, and is all time-consuming, increases cost, uses cylindrical sleeve instead and can overcome above-mentioned shortcoming, as long as it is just passable to use the pipe wrench instrument instead during construction.

Compared with prior art, this grid structure has following advantages with no pin jockey:

1, do not adopt pin, so needn't hole at bolt, improved bearing capacity, and the shortcoming of having avoided pin to fracture.

2, sleeve is changed into cylindrically by hexagon, and it is simple and easy to construct, and reduces cost.

3, scribble fluorescence coating on the bolt, the socket end end face is jagged, can check thus whether screw is screwed to the position.

Claims

1, the no pin linkage of a kind of space truss structure, it is characterized in that on the bolt sphere (1) of steel screwed hole being arranged, the high-strength bolt (2) of packing in the hole, cylindrical sleeve (3) and shrouding (4) are housed on the bolt (2), rod tube (5) and shrouding (4) right-hand member end face are integrally welded, on sleeve (3) the left end end face jagged (9), its endoporus fluted (8) and toroidal cavity (11), there is boss (7) to match on bolt (2) shaft, in the annular groove (11) of sleeve (3) anti-decylization (6) is housed with groove (8).

2, linkage according to claim 1 is characterized in that scribbling on bolt (2) shaft circle fluorescence.