CN219567376U

CN219567376U - Tower crane attachment stay bar

Info

Publication number: CN219567376U
Application number: CN202320409015.8U
Authority: CN
Inventors: 孙兆帅; 刘士伟; 孟凡峰; 刘顺利
Original assignee: Shandong Build Power Equipment Leasing Co ltd
Current assignee: Shandong Build Power Equipment Leasing Co ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-08-22
Anticipated expiration: 2033-03-07

Abstract

The utility model relates to the technical field of attachment stay bars, and discloses a tower crane attachment stay bar, which comprises an outer tube and an outer rod, wherein one end of the outer tube is sealed, the cross section of the outer tube is rectangular, one end of the outer rod, which is close to the outer tube, is connected with an extension column, the cross section of the extension column is rectangular, the other end of the extension column extends into the outer tube, and the vertical two sides of the extension column and the inner tube walls of the two corresponding sides of the outer tube are both connected with a positioning mechanism together; the positioning mechanism comprises a first rack, the first rack is fixedly connected to the column wall of the extension column, a positioning groove is formed in the inner tube wall of the outer tube at a position corresponding to the first rack, a second rack is movably arranged in the positioning groove, and the first rack is meshed with the second rack. The utility model can be used for adjusting the length of the attached stay bar without punching a plurality of adjusting holes on the surface of the outer tube, thereby avoiding fatigue crack of the outer tube and prolonging the service life of the attached stay bar.

Description

Tower crane attachment stay bar

Technical Field

The utility model relates to the technical field of attachment stay bars, in particular to a tower crane attachment stay bar.

Background

The tower crane is a lifting device used in building construction, the tower crane attachment stay bar is a component used for connecting the tower crane with a building main body to play a role in fixing and supporting the tower crane, when the using height of the tower crane exceeds the maximum independent height allowed by the specification, the tower crane is required to be attached and reinforced according to construction requirements, the attaching horizontal distance is generally 3.5-5 meters, the attachment frame is firstly arranged on the tower body during attachment, then the attachment stay bar is hoisted, the attachment stay bar is connected with the attachment frame and an attachment embedded part on a building through a pin shaft, the attachment stay bar is kept in the same horizontal plane, and the extraction length of the inner rod of the attachment stay bar is controlled by inserting different adjusting holes through adjusting pin shafts, so that the integral length of the attachment stay bar is adjusted, and the installation requirements of different distances between the tower crane and the building are met.

The whole length mode of the attaching stay bar is adjusted by inserting the adjusting pin shafts into different adjusting holes: a plurality of adjusting holes are uniformly and equidistantly drilled on the outer tube of the attached stay bar, and the adjusting pin shafts are selectively fixed on the corresponding adjusting holes, so that the length of the attached stay bar is adjusted, but each adjusting hole is spaced, the length of the attached stay bar, which is required to be adjusted, cannot meet the length adjustment requirement of the attached stay bar when the length of the attached stay bar is between the two adjusting holes, and if too many dense adjusting holes are drilled on the outer tube, although the length adjustment requirement of the attached stay bar can be met, the hole edges of the adjusting holes have stress concentration phenomenon, the stress of the stress concentration region is attenuated to the stress level of a normal position along with the increase of the distance away from the hole edges, and the excessively dense stress concentration region can cause breakage of the fragile thick-wall coiled pipe, so that the outer tube generates fatigue cracks, and the service life of the attached stay bar is influenced.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a tower crane attachment stay bar.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the tower crane attachment stay bar comprises an outer tube with one sealed end and a rectangular section and an outer rod, wherein one end of the outer rod, which is close to the outer tube, is connected with an extension column with the rectangular section, the other end of the extension column extends into the outer tube, and the vertical two sides of the extension column and the inner tube walls on the two corresponding sides of the outer tube are both connected with a positioning mechanism together;

the positioning mechanism comprises a first rack, the first rack is fixedly connected to the column wall of the extension column, a positioning groove is formed in the inner tube wall of the outer tube, corresponding to the first rack, a second rack is movably arranged in the positioning groove, the first rack is meshed with the second rack, two threaded columns are symmetrically and rotatably connected to one side, away from the extension column, of the second rack through two bearings, two threaded tubes are inlaid in the position, corresponding to the two threaded columns, of the bottom of the positioning groove, and the threaded columns penetrate through the threaded tubes.

Preferably, the outer tube and the opposite ends of the outer rod are respectively connected with two symmetrically arranged fixing lugs.

Preferably, the top and the bottom of the extension column far away from one end of the outer rod are connected with a plurality of support rollers along the direction of the extension column, and the support rollers are connected on the corresponding inner pipe wall of the outer pipe in a rolling manner.

Preferably, the end parts of the two threaded columns positioned on the same side of the outer tube are connected with belt pulleys, and the two belt pulleys are connected through belt transmission.

Preferably, a driving handle is connected to the side wall of any one of the pulleys.

Preferably, limiting blocks are connected to the inner pipe walls at the top and bottom of the outer pipe, which are close to one end of the outer rod.

Compared with the prior art, the utility model provides the tower crane attachment stay bar, which has the following beneficial effects:

this tower machine adheres to vaulting pole for after second rack breaks away from mutually with first rack through the position of adjustment second rack, can adjust the whole length of adhesion vaulting pole, makes second rack and first rack mesh mutually again, fixes the length after the adjustment of adhesion vaulting pole, when satisfying the adjustable use of adhesion vaulting pole length, need not to beat a plurality of regulation holes on outer tube surface, avoids the outer tube to produce fatigue crack, has improved the life of adhesion vaulting pole.

Drawings

FIG. 1 is a schematic view of a tower crane attachment stay bar according to the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along B-B in FIG. 1;

fig. 4 is an enlarged view of a portion C in fig. 2.

In the figure: 1. an outer tube; 2. an outer rod; 3. an extension column; 4. a first rack; 5. a positioning groove; 6. a second rack; 7. a threaded column; 8. a threaded tube; 9. a bearing; 10. a fixed ear; 11. supporting rollers; 12. a belt pulley; 13. a belt; 14. a drive handle; 15. and a limiting block.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments.

Referring to fig. 1-4, a tower crane attachment stay bar, including outer tube 1 and outer pole 2 that one end is sealed and the cross-section is rectangular, outer tube 1 and outer pole 2 all are connected with two fixed lugs 10 that set up symmetrically in opposite ends, use the round pin axle to pass fixed lugs 10, be connected with the built-in fitting on attaching frame and the attachment building respectively outer tube 1 and outer pole 2, the one end that outer pole 2 is close to outer tube 1 is connected with extension post 3 that the cross-section is rectangular, the other end of extension post 3 extends to in outer tube 1, the top and the bottom that extension post 3 kept away from outer pole 2 one end position all are connected with a plurality of support rollers 11 along extension post 3 direction, support roller 11 roll connection is on the corresponding inner tube wall of outer tube 1, support roller 11 supports extension post 3 through support roller 11, when extension post 3 moves in outer tube 1, support roller 11 rolls, reduce the resistance that extension post 3 receives when moving in outer tube 1, all be connected with stopper 15 on the inner tube wall of top and bottom that outer tube 1 is close to outer pole 2 one end position, stop roller 11, prevent that extension post 3 from taking place from the outer tube 1.

The vertical both sides of extending post 3 all are connected with the positioning mechanism jointly with on the corresponding both sides inner tube wall of outer tube 1, positioning mechanism includes first rack 4, first rack 4 fixed connection is on the column wall of extending post 3, positioning groove 5 has been seted up to the position that corresponds first rack 4 on the inner tube wall of outer tube 1, positioning groove 5 internalization is equipped with second rack 6, first rack 4 meshes with second rack 6 mutually, one side that extending post 3 was kept away from to second rack 6 is connected with two screw thread post 7 through two bearing 9 symmetry rotations, two screw thread pipe 8 have been inlayed to the tank bottom of positioning groove 5 corresponding to the position of two screw thread post 7, screw thread post 7 passes screw thread pipe 8 setting, two screw thread post 7 screw thread directions on the same positioning mechanism are the same.

The ends of the two threaded columns 7 positioned on the same side of the outer tube 1 are connected with belt pulleys 12, the two belt pulleys 12 are connected through a belt 13 in a transmission manner, the side wall of any one belt pulley 12 is connected with a driving handle 14, the driving handle 14 is held, the belt pulleys 12 connected with the driving handle 14 rotate, after the belt 13 is used for transmission, the two belt pulleys 12 rotate at the same speed and in the same direction, the two belt pulleys 12 synchronously rotate and simultaneously drive the two threaded columns 7 to synchronously rotate, and the stable movement of the second rack 6 is ensured.

Working principle: when the integral length of the attached stay bar needs to be adjusted, the driving handle 14 is held, the belt pulleys 12 connected with the driving handle 14 rotate, after the belt 13 drives the two belt pulleys 12 to rotate in the same direction at the same speed, the two belt pulleys 12 rotate synchronously and simultaneously drive the two threaded columns 7 to rotate synchronously, the threaded columns 7 rotate in the threaded pipes 8 and adjust the positions of the threaded columns, the threaded columns 7 move outwards towards the outer pipe 1, the threaded columns 7 drive the second racks 6 to move outwards synchronously through the bearings 9 when moving, after the second racks 6 are separated from the first racks 4, the outer pipe 2 is held again to apply a pulling force, the extension columns 3 are pulled to move in the outer pipe 1, after the integral length of the attached stay bar is adjusted to the required length, reverse rotating force is applied to the driving handle 14, the threaded columns 7 rotate reversely, the second racks 6 move towards the extension columns 3, the second racks 6 are meshed with the first racks 4, the stay positions of the extension columns 3 in the outer pipe 1 are fixed, the adjusted length of the attached stay bar is fixed, the length of the attached stay bar is met, and meanwhile, the fatigue of the outer pipe 1 is avoided, and the fatigue is avoided.

The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.

Claims

1. The tower crane attachment stay bar comprises an outer tube and an outer rod, wherein one end of the outer tube is sealed, the cross section of the outer tube is rectangular, and the tower crane attachment stay bar is characterized in that one end of the outer rod, which is close to the outer tube, is connected with an extension column, the cross section of which is rectangular, the other end of the extension column extends into the outer tube, and the vertical two sides of the extension column and the inner tube walls of the two corresponding sides of the outer tube are both connected with a positioning mechanism together;

2. The tower crane attachment stay of claim 1 wherein the outer tube and the opposite ends of the outer rod are each connected with two symmetrically disposed fixed lugs.

3. The tower crane attachment stay of claim 1 wherein the top and bottom of the extension column at a location distal from the outer column end are each connected with a plurality of support rollers along the extension column direction, the support rollers being rollingly connected to corresponding inner tube walls of the outer tube.

4. The tower crane attachment stay of claim 1 wherein the two threaded post ends on the same side of the outer tube are each connected to a pulley, the two pulleys being connected by a belt drive.

5. The tower attachment brace of claim 4, wherein a drive handle is attached to a sidewall of any one of the pulleys.

6. The tower crane attachment stay of claim 1 wherein the top and bottom inner walls of the outer tube proximate the outer rod at one end are each connected to a stop block.