CN201961998U

CN201961998U - Connecting structure between standard sections of building tower crane

Info

Publication number: CN201961998U
Application number: CN201020668250XU
Authority: CN
Inventors: 洪学如
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-20
Filing date: 2010-12-20
Publication date: 2011-09-07
Anticipated expiration: 2020-12-20

Abstract

The utility model relates to a connecting structure between standard sections of a building tower crane, in particular to a connecting surface structure between standard sections in a building tower crane, belonging to the technical field of design and manufacture of building machinery. The connecting structure comprises standard sections taking four pieces of main bearing angle iron as the main body, and the upper end surfaces and the lower end surfaces of the four pieces of main bearing angle iron are respectively provided with a plurality of trapezoid teeth and slots. The trapezoid teeth and slots at the lower end of the four pieces of main bearing angle iron in the last standard section are completely coupled in the trapezoid slots and teeth at the upper end of the four pieces of main bearing angle iron in the next standard section. In the technical scheme, a structure manner that a plurality of tooth surfaces and a plurality of slot surfaces are completely contacted in a coupling way is adopted between the contact surfaces of the adjacent standard sections, and the degree of freedom of tangential rotation between the two adjacent standard sections is restrained, thus eliminating the relative movement of the tangential rotation between the two adjacent standard sections, and realizing the aim of getting rid of external force for loosening the nut in a fastening bolt. The connecting structure has the obvious advantages of being reasonable and reliable in structure, and greatly promoting the safety factor.

Description

Connection structure between a kind of building tower crane standard knot

Technical field

The utility model relates to the connection structure between a kind of building tower crane standard knot, relates in particular to the joint face structure between the standard knot and standard knot in a kind of building tower crane, belongs to vehicle for construction design and manufacturing technology field.

Background technology

Its suspension bracket of known building tower crane is piled up by several standard knot assembly units and is formed, and the contact surface between standard knot and the standard knot is the end face of four main load-bearing angle steel, is fastenedly connected by bolt between standard knot and the standard knot.Such building tower crane exists serious potential safety hazard on the joint face structure of standard knot and standard knot.Because, place tower crane lifting cantilever topmost often to need the load left rotation and right rotation, even under the situation of not handling building materials, the counterweight load of lifting cantilever rear end also is very big.Therefore lift by crane cantilever when rotated to suspension bracket effect great twisting resistance, wherein lift by crane the cantilever twisting resistance that its rotatory inertia produced when rotation direction changes and be maximum.This twisting resistance will cause producing between the standard knot of tower crane and the standard knot contact surface relative motion of tangentially reversing.Although people have adopted a plurality of large diameter bolts fastening in addition, but because tangential rotary freedom does not between the two obtain constraint and restriction, therefore its relative motion still inevitable (the lifting cantilever squeak that suspension bracket sent when rotated, the friction that is exactly the tangential relative motion generation between the standard knot is sent).This relative motion meeting makes bolt looseness and loosening amplitude As time goes on become increasing, if can not eliminate immediately, its consequence is that bolt fracture causes tower to fall the people to die.Many bloody accidents of witnessing for above-mentioned reasons to be occurred are startling.

Summary of the invention

At the potential safety hazard that present building tower crane exists, the utility model proposes the connection structure between a kind of building tower crane standard knot that can eliminate above-mentioned potential safety hazard on the contact surface structure between the standard knot.

To achieve these goals, the utility model takes following technical scheme to implement: it comprises a plurality of standard knots that are main body by four main load-bearing angle steel, is shaped on a plurality of stepped tooths and groove respectively on the upper and lower end face of four main load-bearing angle steel.The stepped tooth of four main load-bearing angle steel lower ends and the complete coupling of groove are in the dovetail groove and tooth of four main load-bearing angle steel of next joint standard knot upper end in the last joint standard knot.This programme has adopted a plurality of flank of tooth and the complete coupling contacting structure of groove face mode between every adjacent standard knot contact surface, constrained tangential rotary freedom between the two, therefore eliminated the relative motion of tangential rotation between the two, purpose is to get rid of the external force that produces nut loosening in the binding bolt.The utlity model has reliable, remarkable advantage that safety factor significantly promotes rational in infrastructure.

Description of drawings

Fig. 1 is the main TV structure scheme drawing of the utility model standard knot;

Fig. 2 is the left TV structure scheme drawing of the utility model standard knot;

Fig. 3 is the contact surface structural representation between the utility model standard knot and the standard knot;

Fig. 4 is an I part-structure enlarged drawing among Fig. 3.

In Fig. 1,2,3,4: 1 main load-bearing angle steel, 2 stepped tooths, 3 dovetail grooves, 4 bolts, 5 adapter sleeves, 6 nuts.

The specific embodiment

Stepped tooth 2, the dovetail groove 3 of a plurality of positive and negatives each other and coupling fully are set at the upper and lower end of the main load-bearing angle steel 1 shown in Fig. 1,2 standard knots.Shown in Fig. 3,4, when building suspension bracket, a plurality of stepped tooths 2, the dovetail groove 3 complete couplings of four main load-bearing angle steel 1 lower ends in the last joint standard knot are saved in a plurality of dovetail grooves 3 and stepped tooth 2 of four main load-bearing angle steel 1 upper ends in standard knot at next, and pass a plurality of adapter sleeves 4 that are welded on the main load-bearing angle steel 1 with a plurality of large diameter bolts 4, upper and lower two adjacent standard knots are coupled together, again by double nuts 6 and tight.Because the upper and lower end of the four piece main load-bearing angle steel 1 of the utility model in a plurality of standard knots all is provided with stepped tooth 2, the dovetail groove 3 of positive and negative each other and coupling fully, thereby make contact surface between every adjacent two standard knots become the closely connected contact surface in bottom surface, inclined-plane of end face, inclined-plane and the groove of tooth.Wherein the vertical plane on end face and bottom surface and the inclined-plane is the bearing surface that bears gravity and vertical component.When coming from the twisting force that lifts by crane cantilever on the contact inclined-plane time, this torsion is exactly the positive pressure on the contact inclined-plane, and this positive pressure can resolve into a vertical component and a horizontal component of force.Wherein horizontal component of force is the basic external force that causes producing between the standard knot contact surface tangential rotation relative motion.As everyone knows, on contact surface, there is application force that antagonistic force is just arranged, wherein antagonistic force can resolve into a vertical component and a horizontal component of force equally, and this horizontal component of force is exactly the power that produces tangential rotation relative motion between constraint and the limitation standard joint contact surface, also is to limit the power of tangential rotary freedom between the two.So, behind the degree of freedom that has limited tangential rotation between the two, it is impossible that bolt 4, nut 5 loosening will become, thereby improved the safety factor of building tower crane greatly.

Claims

1. the connection structure between a building tower crane standard knot, it comprises a plurality of standard knots that are main body by four main load-bearing angle steel, it is characterized in that being shaped on a plurality of stepped tooths and groove on the upper and lower end face of four main load-bearing angle steel.

2. the connection structure between a kind of building tower crane standard knot according to claim 1 is characterized in that the stepped tooth and the complete coupling of groove of four main load-bearing angle steel lower surfaces in the joint standard knot saves in the dovetail groove and tooth of four main load-bearing angle steel of standard knot upper surface at next.