Hydraulic jacking device of tower crane

Abstract

The utility model relates to the technical field of tower cranes, in particular to a tower crane hydraulic jacking device which comprises a fixed supporting frame, a movable tower frame and a guide assembly, a jacking hydraulic cylinder is fixedly installed on the inner side of the fixed supporting frame, and a top frame fixedly connected with the inner side of the movable tower frame is arranged at the top end of the jacking hydraulic cylinder. The guide assembly comprises a movable angle rod fixed to the periphery of the fixed supporting frame and a fixed angle rod fixed to the inner side of the movable tower, the fixed angle rod and the movable angle rod are each of a right-angle strip structure, limiting sliding grooves are formed in the surface of the fixed angle rod and the surface of the movable angle rod, and the strip bearing set comprises a retaining strip and a rolling shaft. According to the novel hydraulic jacking guide structure, the fixed angle rod, the movable angle rod and the inner bearing strip set are used for movement guide, movement guide is conducted under uniform contact of the rolling shafts, supporting guide work is achieved, the supporting contact effect is improved, and lateral toppling is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tower cranes, in particular to a hydraulic jacking device for tower cranes. Background Art

[0002] The tower crane jacking device includes a pump station and a jacking cylinder. The pump station is installed on the lifting frame of the tower crane. One end of the jacking cylinder is fixed on the lifting frame, and the other end is supported on the standard section. The extension and retraction of the jacking cylinder controls the lifting and lowering of the tower crane. The jacking device is a very important component of the tower crane. The jacking device mainly provides vertical upward support during the driving process, but it is affected by lateral forces such as wind during the jacking process, which can easily cause the tower crane to tilt, causing the jacking device to bend and deform due to the lateral force, affecting the retraction of the jacking device and reducing its service life.

[0003] In view of this, research and improvement are carried out on the existing problems, and a tower crane hydraulic jacking device is provided to solve the current problems. The purpose is to solve the problems and improve the practical value through this technology. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] To this end, the technical solution adopted by the utility model is: a hydraulic jacking device for a tower crane, comprising: a fixed support frame, a moving tower frame and a guide assembly, a jacking hydraulic cylinder is fixedly installed on the inner side of the fixed support frame, the top of the jacking hydraulic cylinder is provided with a jacking frame fixedly connected to the inner side of the moving tower frame, the guide assembly comprises a moving angle rod respectively fixed to the outer periphery of the fixed support frame and a fixed angle rod fixed to the inner side of the moving tower frame, the fixed angle rod and the moving angle rod are both right-angle bar structures, and limiting sliding grooves are provided on the surfaces of the fixed angle rod and the moving angle rod, the supporting bar group comprises a retaining bar and a roller, the surface of the retaining bar is provided with a plurality of through holes, the roller is located on the inner side of each through hole and slides in contact with the inner side of the limiting sliding groove.

[0006] In a preferred example, the utility model can be further configured as follows: the cross-sections of the fixed angle rods and the movable angle rods are right-angled, and the number of the fixed angle rods and the movable angle rods are four and they are respectively fixed to the four corners of the fixed support frame and the movable tower frame.

[0007] In a preferred example, the utility model can be further configured as follows: the limiting slide groove is in the shape of a right-angled triangular groove, and the end face and the cylindrical surface of the roller are in sliding contact with the surface of the limiting slide groove.

[0008] In a preferred example, the utility model can be further configured as follows: the surfaces of the limiting slide groove and the roller are hardened, and the roller is a component made of alloy steel.

[0009] In a preferred example, the utility model can be further configured as follows: the roller diameter is equal to the roller column length, and the diagonal line of the roller cross section and the retaining strip are located in the same vertical plane.

[0010] In a preferred example, the utility model can be further configured as follows: the number of the rollers is multiple, and the multiple rollers are evenly arranged in a straight line direction, and adjacent rollers are arranged in mutually staggered directions.

[0011] The beneficial effects achieved by the utility model are:

[0012] 1. In the utility model, a new hydraulic lifting guide structure is provided, and the fixed angle rod, the movable angle rod and the internal bearing bar group are used for motion guidance. The motion guidance is carried out under the uniform contact of a plurality of rollers, so as to realize the support and guidance work, improve the support contact effect and avoid lateral tipping.

[0013] 2. In the utility model, a plurality of rollers are arranged in a staggered manner, and rolling guidance is performed under the support of the rollers, and the support is staggered in a V shape, and the double support surface supports the guidance, thereby reducing the sliding friction between the fixed support frame and the moving tower frame and improving the stability of the jacking movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the exploded structure of a guide assembly and a support bar assembly according to an embodiment of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of a guide assembly according to an embodiment of the utility model;

[0017] Figure 4 The figure is a schematic diagram of the structure of a support bar group according to an embodiment of the utility model.

[0018] Reference numerals:

[0019] 100, fixed support frame; 110, lifting hydraulic cylinder; 200, moving tower frame;

[0020] 300, guide assembly; 310, fixed angle rod; 320, movable angle rod; 321, limit slide;

[0021] 400, support bar assembly; 410, retaining bar; 420, roller; 411, through hole. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0023] A tower crane hydraulic jacking device provided by some embodiments of the utility model will be described below in conjunction with the accompanying drawings.

[0024] Combination Figure 1-4 As shown, the utility model provides a hydraulic lifting device for a tower crane, comprising: a fixed support frame 100, a moving tower frame 200 and a guide assembly 300, wherein a lifting hydraulic cylinder 110 is fixedly installed on the inner side of the fixed support frame 100, and a top frame fixedly connected to the inner side of the moving tower frame 200 is provided on the top of the lifting hydraulic cylinder 110, and the guide assembly 300 comprises a moving angle rod 320 respectively fixed to the outer periphery of the fixed support frame 100 and a fixed angle rod 310 fixed to the inner side of the moving tower frame 200, the fixed angle rod 310 and the moving angle rod 320 are both right-angle bar structures, and limiting sliding grooves 321 are provided on the surfaces of the fixed angle rod 310 and the moving angle rod 320, and the supporting bar group 400 comprises a retaining bar 410 and a roller 420, and a plurality of through holes 411 are provided on the surface of the retaining bar 410, and the roller 420 is located on the inner side of each through hole 411 and slides against the inner side of the limiting sliding groove 321.

[0025] In this embodiment, the cross-sections of the fixed angle rods 310 and the movable angle rods 320 are in a right angle shape. There are four fixed angle rods 310 and four movable angle rods 320 , which are respectively fixed to the four corners of the fixed support frame 100 and the movable tower frame 200 .

[0026] In this embodiment, the limiting sliding groove 321 is in the shape of a right-angled triangular groove, and the end surface and the cylindrical surface of the roller 420 are in sliding contact with the surface of the limiting sliding groove 321 .

[0027] In this embodiment, the surfaces of the limiting slide groove 321 and the roller 420 are hardened, and the roller 420 is a component made of alloy steel.

[0028] Specifically, by increasing the surface hardness of the roller 420 and the limiting slide groove 321, wear caused by contact friction can be avoided.

[0029] In this embodiment, the diameter of the roller 420 is equal to the column length of the roller 420 , and the diagonal line of the cross section of the roller 420 and the retaining bar 410 are located in the same vertical plane.

[0030] Furthermore, there are a plurality of rollers 420 , and the plurality of rollers 420 are evenly arranged in a straight line, and adjacent rollers 420 are arranged in a staggered direction.

[0031] Specifically, by utilizing the staggered arrangement of rollers 420 , both the end faces and the cylindrical surfaces thereof can be contact supported, thereby improving the support stability.

[0032] The working principle and use process of this utility model:

[0033] During the hydraulic lifting process of the tower crane, the moving tower frame 200 is guided and lifted along the outer periphery of the fixed support frame 100 by the lifting hydraulic cylinder 110, and the limiting slide grooves 321 on the surfaces of the fixed angle rods 310 and the moving angle rods 320 are in contact with the surfaces of each roller 420. The gap between the fixed angle rods 310 and the moving angle rods 320 is supported and maintained stable by the rollers 420 to avoid the side tilt between the fixed support frame 100 and the moving tower frame 200 caused by the action of lateral wind and the like, and the surfaces of the rollers 420 are synchronously and evenly in contact with the inner walls of the limiting slide grooves 321 on both sides, and the four surfaces are in synchronous contact to improve the supporting effect.

[0034] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tower crane hydraulic jacking device, characterized in that: include: A fixed support frame (100), a moving tower frame (200), a guide assembly (300), and a support bar group (400); a lifting hydraulic cylinder (110) is fixedly installed on the inner side of the fixed support frame (100); a top frame fixedly connected to the inner side of the moving tower frame (200) is provided at the top of the lifting hydraulic cylinder (110); the guide assembly (300) comprises a moving angle bar (320) fixed to the outer periphery of the fixed support frame (100) and a fixed angle bar (310) fixed to the inner side of the moving tower frame (200); the fixed angle bar (310) and the moving angle bar (320) are both right-angle bar structures; and limited sliding grooves (321) are provided on the surfaces of the fixed angle bar (310) and the moving angle bar (320).

2. A tower crane hydraulic jacking device according to claim 1, characterized in that: The fixed angle rods (310) and the movable angle rods (320) have right-angle cross-sections. The number of the fixed angle rods (310) and the movable angle rods (320) are both four and they are respectively fixed to the four corners of the fixed support frame (100) and the movable tower frame (200).

3. A tower crane hydraulic jacking device according to claim 1, characterized in that: The support bar group (400) comprises a retaining bar (410) and a roller (420); a surface of the retaining bar (410) is provided with a plurality of through holes (411); the roller (420) is located inside each through hole (411) and is slidably abutted against the inside of the limiting sliding groove (321).

4. A tower crane hydraulic jacking device according to claim 3, characterized in that: The limiting sliding groove (321) is in the shape of a right-angled triangular groove, and the end surface and the cylindrical surface of the roller (420) are in sliding contact with the surface of the limiting sliding groove (321).

5. The tower crane hydraulic jacking device according to claim 3, characterized in that: The surfaces of the limiting slide groove (321) and the roller (420) are hardened, and the roller (420) is a component made of alloy steel.

6. A tower crane hydraulic jacking device according to claim 3, characterized in that: The diameter of the roller (420) is equal to the column length of the roller (420), and the diagonal line of the cross section of the roller (420) and the retaining strip (410) are located in the same vertical plane.

7. A tower crane hydraulic jacking device according to claim 3, characterized in that: The number of the rollers (420) is a plurality, and the plurality of rollers (420) are evenly arranged in a straight line direction, and adjacent rollers (420) are arranged in mutually staggered directions.

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