CN202322129U

CN202322129U - Tower crane

Info

Publication number: CN202322129U
Application number: CN2011204926364U
Authority: CN
Inventors: 吴传戈; 黄华; 李国臣; 张中凯; 张中义; 张铁锤; 袁林泽; 陈浩然
Original assignee: ZHENGZHOU GREATWALL MACHINE MANUFACTURING Co Ltd
Current assignee: ZHENGZHOU GREATWALL MACHINE MANUFACTURING Co Ltd
Priority date: 2011-12-01
Filing date: 2011-12-01
Publication date: 2012-07-11
Anticipated expiration: 2021-12-01

Abstract

The utility model relates to a tower crane which comprises a base, a tower body and a rotating mechanism, wherein the rotating mechanism comprises an upper bracket, a lower bracket and a rotating support positioned between the upper bracket and the lower bracket; the rotating axis of the rotating support is in the vertical direction; the rotating support comprises an inner race and an outer ring which forms a rotating fit with the inner race; the inner race is fixed with the upper bracket; the outer ring is fixed with the lower bracket; and the inner race and the upper bracket are aligned with the centering structure of the rotating center and the centering structure of the outer ring and lower bracket through a centering structure. The utility model has the advantages of simple structure, low workload, high efficiency and low cost, and is very convenient to mount, and well solves the problem that the rotating center of the upper bracket, the rotating support and the lower bracket in the rotating mechanism of the tower crane can not be easily aligned with the vertical direction.

Description

Tower crane

Technical field

The utility model relates to a kind of vehicle for construction, particularly tower crane.

Background technology

Tower crane generally comprises base, is installed in the body of the tower on the base, is located at arm and equilibrium arm on the body of the tower, has single-revolution mechanism in the position that is positioned on the body of the tower below the arm; This swing type mechanism comprises upper bracket, undersetting and the pivoting support between upper and lower bearing, pivoting support comprise inner ring and with the outer ring of inner ring normal-running fit, wherein inner ring and upper bracket are connected; Outer ring and undersetting are connected, in the prior art, because the Internal and external cycle upper and lower end face of pivoting support is the plane; Be the plane with the end face of the corresponding upper and lower bearing of pivoting support Internal and external cycle contact matching, so the unusual difficulty of the center of gyration that vertically aligns upper bracket, pivoting support and undersetting, adding the each several part massiveness has more increased the difficulty that the center aligns; If center of gyration does not align, bolt of rear end plate all can't screw in the corresponding bolt hole, even use welding by force each several part to be fixed; If but center of gyration is not to be on the vertical straight line, stability reduces during operation, even can cause danger; In the real work; Usually need adjust times without number in the hope of the center of gyration with each several part and align, work capacity is very big, and efficient is very low.

The utility model content

The purpose of the utility model is to provide tower crane, with the difficult problem that vertically aligns of the center of gyration of upper bracket, pivoting support and support down in the swing type mechanism that solves tower crane in the prior art.

In order to address the above problem; The tower crane of the utility model; Comprise base, be installed in the body of the tower on the said base and be located at the swing type mechanism on the said body of the tower; This swing type mechanism comprises upper bracket, undersetting and the pivot center pivoting support vertically between said upper and lower bearing; This pivoting support comprise inner ring and with the outer ring of said inner ring normal-running fit; Wherein said inner ring and said upper bracket are connected; Said outer ring and said undersetting are connected; Said inner ring and said upper bracket align center of gyration through adjective-centre structure, and first annular groove that this adjective-centre structure overlaps for the line of centers that on one of them face in said inner ring upper surface and the said upper bracket lower surface, is provided with and the pivot center of said pivoting support and on another face, be provided with said first annular groove and rotate first annular projection that the location of pegging graft cooperates perhaps is setting and the said pivoting support endoporus rotation annular boss that grafting cooperates and pivot center overlaps with said upper bracket rotation axis on the lower surface of said upper bracket; Said outer ring and the adjective-centre structure of said undersetting be included in be provided with on second annular groove that the line of centers that is provided with on one of them face in lower surface, said outer ring and the said undersetting lower surface and the pivot center of said pivoting support overlap and another face rotate second annular projection that the location of pegging graft cooperates with said second annular groove.

Described first annular groove is located on the upper surface of said pivoting support inner ring, and described first annular projection is located on the said lower surface of upward supporting and the line of centers of this annular projection overlaps with the said pivot center that supports of going up; Described second annular groove is located on the said upper surface of supporting down, and described first annular projection is located on the lower surface, said pivoting support outer ring and the line of centers of this annular projection and the said central lines that supports down.

Along the circumferential direction be evenly distributed to few two bolt penetration hole of in axial direction extending on the said inner ring of said pivoting support and the said outer ring; Said inner ring is realized fixing through bolt of rear end plate in the bolt penetration hole and said upper bracket, said outer ring is realized fixing through the bolt of rear end plate and the said undersetting that revolve in the bolt penetration hole.

The outer peripheral face of said outer ring is provided with and is used for and the cog gear teeth of engagement fit of propulsion source output shaft.

The utility model cooperates with the grafting of annular recess with pivoting support endoporus or annular projection through annular boss in upper bracket, undersetting and the pivoting support of swing type mechanism in the tower crane; Be easy to realize the aligning of center of gyration of upper bracket, undersetting and pivoting support; Simple in structure; Install very convenient again; Work capacity is little, efficient is expensive low, and the fine center of gyration that has solved in the prior art upper bracket, pivoting support in the swing type mechanism of tower crane and supported down is difficult for the problem that vertically aligns.

Description of drawings

Fig. 1 is the structural representation of the swing type mechanism of tower crane among the utility model embodiment;

Fig. 2 is the structural representation at A place among Fig. 1;

Fig. 3 is the structural representation of tower crane among the utility model embodiment.

The specific embodiment

Below in conjunction with accompanying drawing the utility model embodiment is done detailed description:

The embodiment of tower crane

Embodiment 1

Shown in Fig. 1 ~ 3; Comprise base 10, be installed in body of the tower 11 on 10 bases, be located at arm 12 and the equilibrium arm 13 on this body of the tower 11 and be located at the swing type mechanism 14 on the body of the tower 11; This swing type mechanism 14 comprises upper bracket 1, undersetting 2 and at upper and lower bearing 1, line of centers pivoting support vertically between 2; This pivoting support comprise inner ring 4 and with the outer ring 3 of inner ring 4 normal-running fiies; Wherein inner ring 4 is connected with upper bracket 1; Outer ring 3 is connected with undersetting 2, and said inner ring 4 and said upper bracket 1 align center of gyration through adjective-centre structure, and this adjective-centre structure be on the lower surface of said upper bracket 1, to be provided with and the said pivoting support endoporus 5 rotation annular boss 7 that grafting cooperates and pivot center overlaps with said upper bracket 1 rotation axis; The adjective-centre structure of said outer ring and said undersetting is included in second annular groove 6 that is provided with on the upper surface of undersetting 2; And outer ring 3 and undersetting 2 upper surface heavy keying fit the lower surface on be provided with and second annular groove 6, second annular projection 8 that the location cooperates of pegging graft; The line of centers of this second annular groove 6 overlaps with the pivot center of said pivoting support, the central lines of the line of centers of this convexity 8 and undersetting 2; Along the circumferential direction be evenly distributed to few two

bolt penetration hole

15,16 of in axial direction extending on the said inner ring 4 of pivoting support and the said outer ring 3; Inner ring 4 is realized fixing through bolt of rear end plate in the bolt penetration hole 16 and upper bracket 1, outer ring 3 is realized fixing through bolt of rear end plate in the bolt penetration hole 16 and undersetting 2; The outer peripheral face of outer ring 3 is provided with and is used for and the cog gear teeth 9 of engagement fit of propulsion source output shaft, between the pivoting support Internal and external cycle, is provided with exclusion seal ring 17.

During assembling; Only need annular boss with upper bracket be plugged in the endoporus of pivoting support and the annular projection of outer ring inserted aligning of the center of gyration that to realize upper bracket, undersetting and pivoting support in the annular recess of undersetting; Simple in structure, to install very conveniently again, work capacity is little; Efficient is expensive low, and the fine center of gyration that has solved in the prior art upper bracket, pivoting support in the swing type mechanism of tower crane and supported down is difficult for the problem that vertically aligns.

Embodiment 2

The adjective-centre structure of different with embodiment 1 is said inner ring and said upper bracket can also on first annular groove that is provided with on the upper surface of inner ring and lower surface, be provided with in upper bracket and inner ring upper surface heavy keying fit with first annular groove, first annular projection that the location cooperates of pegging graft; The line of centers of first annular groove overlaps with the pivot center of said pivoting support, and the line of centers of first annular projection overlaps with the pivot center of upper bracket.

Embodiment 3

Different with embodiment 2 is, the adjective-centre structure of said inner ring and said upper bracket can also for first annular groove that is provided with on the upper bracket lower surface and said inner ring and upper bracket lower surface heavy keying fit the upper surface on be provided with first annular groove, first annular projection that the location cooperates of pegging graft.

Embodiment 4

All different with embodiment 1 and embodiment 2 is; On the lower surface, outer ring, be provided with the line of centers of second annular groove and this second annular groove and the central lines of said pivoting support, on the upper surface of undersetting and lower surface, outer ring heavy keying fit, be provided with and second annular groove, second annular projection that the location cooperates of pegging graft.

Embodiment 5

Different with embodiment 2 is; On the upper bracket lower surface, be provided with the line of centers of first annular groove and this first annular groove and the central lines of said pivoting support, said inner ring and upper bracket lower surface heavy keying fit the upper surface on be provided with and first annular groove, first annular projection that the location cooperates of pegging graft; On the lower surface, outer ring, be provided with the line of centers of second annular groove and this second annular groove and the central lines of said pivoting support, on the upper surface of undersetting and lower surface, outer ring heavy keying fit, be provided with and second annular groove, second annular projection that the location cooperates of pegging graft.

Claims

1. tower crane; Comprise base, be installed in the body of the tower on the said base and be located at the swing type mechanism on the said body of the tower; This swing type mechanism comprises upper bracket, undersetting and the pivot center pivoting support vertically between said upper and lower bearing; This pivoting support comprise inner ring and with the outer ring of said inner ring normal-running fit; Wherein said inner ring and said upper bracket are connected; Said outer ring and said undersetting are connected; It is characterized in that: said inner ring and said upper bracket align center of gyration through adjective-centre structure; First annular groove that this adjective-centre structure overlaps for the line of centers that on one of them face in said inner ring upper surface and the said upper bracket lower surface, is provided with and the pivot center of said pivoting support and on another face, be provided with said first annular groove and rotate first annular projection that the location of pegging graft cooperates perhaps is setting and the said pivoting support endoporus rotation annular boss that grafting cooperates and pivot center overlaps with said upper bracket rotation axis on the lower surface of said upper bracket; Said outer ring and the adjective-centre structure of said undersetting be included in be provided with on second annular groove that the line of centers that is provided with on one of them face in lower surface, said outer ring and the said undersetting lower surface and the pivot center of said pivoting support overlap and another face rotate second annular projection that the location of pegging graft cooperates with said second annular groove.

2. tower crane according to claim 1; It is characterized in that: described first annular groove is located on the upper surface of said pivoting support inner ring, and described first annular projection is located on the said lower surface of upward supporting and the line of centers of this annular projection overlaps with the said pivot center that supports of going up; Described second annular groove is located on the said upper surface of supporting down, and described first annular projection is located on the lower surface, said pivoting support outer ring and the line of centers of this annular projection and the said central lines that supports down.

3. tower crane according to claim 1 and 2; It is characterized in that: along the circumferential direction be evenly distributed to few two bolt penetration hole of in axial direction extending on the said inner ring of said pivoting support and the said outer ring; Said inner ring is realized fixing through bolt of rear end plate in the bolt penetration hole and said upper bracket, said outer ring is realized fixing through the bolt of rear end plate and the said undersetting that revolve in the bolt penetration hole.

4. tower crane according to claim 3 is characterized in that: the outer peripheral face of said outer ring is provided with and is used for and the cog gear teeth of engagement fit of propulsion source output shaft.