CN219031590U - Underframe for tower crane - Google Patents

Abstract

The utility model belongs to the technical field of tower cranes, in particular to a chassis for a tower crane, which aims at the problem that the existing chassis for the tower crane only has the effect of being fixed with the ground when in use, and cannot be well supported when the tower crane inclines, so that the tower crane is easy to turn on one's side. The utility model has simple operation and convenient use, can be convenient for stably supporting the crane, can adjust the supporting angle and the height according to the requirement, and is convenient for people to use.

Description

Underframe for tower crane

Technical Field

The utility model relates to the technical field of tower cranes, in particular to a bottom frame for a tower crane.

Background

The tower crane is a lifting device which is most commonly used on a construction site, is also called as a tower crane, is built by a standard section of a standard section, is used for lifting construction raw materials such as steel bars, wood ridges, concrete, steel pipes and the like, and is an indispensable device on the construction site. The underframe of the tower crane mainly plays a role in stabilizing and supporting.

The application number 202021593951.1 discloses a chassis for a tower crane, which comprises an embedded joint, wherein the top of the embedded joint is provided with a base, the base is connected with the embedded joint through a bolt, the surface of a bolt is provided with a protective cover, and the bolt is in threaded connection with the protective cover.

When the existing tower crane underframe is used, the effect of being fixed with the ground can only be achieved, and when the tower crane tilts, the tower crane underframe cannot be well supported, so that the tower crane is easy to turn over.

Disclosure of Invention

The utility model aims to solve the defects that the existing tower crane underframe only has the effect of being fixed with the ground when in use, and the tower crane cannot be well supported when the tower crane tilts, so that the tower crane is easy to appear a rollover phenomenon.

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

the utility model provides a chassis that tower crane used, includes the bottom plate, the top fixed mounting of bottom plate has the bed frame, the top fixed mounting of bed frame has four bracing pieces that the symmetry set up, installs the mount between two bracing pieces that correspond, the top of bottom plate rotates and is connected with four stay tubes that the symmetry set up, sliding connection has the ejector pin on the stay tube, it is connected with the connecting plate to rotate on the ejector pin, is equipped with two bolts on the connecting plate, has seted up a plurality of locating holes on the bracing piece, bolt and corresponding locating hole threaded connection, be equipped with pushing mechanism on the bottom plate, be equipped with stop gear on the stay tube, stop gear and ejector pin mutually support, pushing mechanism mutually support with the stay tube.

Preferably, the pushing mechanism comprises a motor, the motor is fixedly arranged on one side of the bottom plate, four symmetrically arranged sliding grooves are formed in the top of the bottom plate, the two corresponding sliding grooves are rotationally connected with the same bidirectional screw rod, the inner wall of each sliding groove is slidably connected with a moving block, and the two corresponding moving blocks are in threaded connection with the same bidirectional screw rod.

Preferably, the limiting mechanism comprises a rotary pipe, a rotary groove is formed in the bottom end of the rotary pipe in a sleeved mode, the rotary groove is rotationally connected with the supporting pipe, positioning blocks are fixedly installed on inner walls of two sides of the rotary groove, an annular sliding groove is formed in the outer side of the supporting pipe, and the two positioning blocks are in sliding connection with the annular sliding groove.

Preferably, the two-way screw is fixedly sleeved with a chain wheel, and the two chain wheels are meshed with the same chain.

Preferably, limit grooves are formed in two sides of the ejector rod, limit blocks are fixedly mounted on inner walls of two sides of the supporting tube, and the limit blocks are in sliding connection with the corresponding limit grooves.

Compared with the prior art, the utility model has the advantages that:

(1) According to the scheme, as the two chain wheels are meshed with the chain, and the two-way screw rod is in threaded connection with the two moving blocks, the output shaft of the motor can drive the two-way screw rods to rotate simultaneously, so that the two moving blocks are driven to approach each other, and the supporting tube is pushed;

(2) Because the two positioning blocks are in sliding connection with the annular sliding groove, and the limiting groove is in sliding connection with the limiting block, the rotating pipe can drive the ejector rod and the supporting pipe to move in position through threaded connection with the ejector rod.

The utility model has simple operation and convenient use, can be convenient for stably supporting the crane, can adjust the supporting angle and the height according to the requirement, and is convenient for people to use.

Drawings

FIG. 1 is a schematic view of a chassis for a tower crane according to the present utility model;

FIG. 2 is a schematic cross-sectional view of a base plate and a positioning shaft of a chassis for a tower crane according to the present utility model;

fig. 3 is a schematic cross-sectional view of a support tube and a swivel of a chassis for a tower crane according to the present utility model.

In the figure: 1. a bottom plate; 2. a base frame; 3. a support rod; 4. a fixing frame; 5. a support tube; 6. a push rod; 7. a connecting plate; 8. a bolt; 9. positioning holes; 10. a rotary pipe; 11. a sliding groove; 12. a moving block; 13. a bidirectional screw; 14. a motor; 15. a rotating groove; 16. a positioning block; 17. an annular chute; 18. a limiting block; 19. a limit groove; 20. a placement groove; 21. positioning a shaft; 22. and a baffle.

Detailed Description

The technical solutions of the present embodiment will be clearly and completely described below with reference to the drawings in the present embodiment, and it is apparent that the described embodiments are only some embodiments of the present embodiment, not all embodiments.

Example 1

Referring to fig. 1-3, an underframe for a tower crane comprises a bottom plate 1, a base frame 2 is fixedly arranged at the top of the bottom plate 1, four symmetrically arranged supporting rods 3 are fixedly arranged at the top of the base frame 2, a fixing frame 4 is arranged between the two corresponding supporting rods 3, four symmetrically arranged supporting pipes 5 are rotatably connected at the top of the bottom plate 1, a top rod 6 is slidably connected on the supporting pipes 5, a connecting plate 7 is rotatably connected on the top rod 6, two bolts 8 are arranged on the connecting plate 7, a plurality of positioning holes 9 are formed in the supporting rods 3, the bolts 8 are in threaded connection with the corresponding positioning holes 9, a pushing mechanism is arranged on the bottom plate 1, a limiting mechanism is arranged on the supporting pipes 5 and is mutually matched with the top rod 6, and the pushing mechanism is mutually matched with the supporting pipes 5.

In this embodiment, the pushing mechanism includes motor 14, motor 14 fixed mounting is in one side of bottom plate 1, four sliding tray 11 that symmetry set up have been seted up at the top of bottom plate 1, rotate on two corresponding sliding tray 11 and be connected with same two-way screw 13, sliding connection has movable block 12 on the inner wall of sliding tray 11, two corresponding movable block 12 and same two-way screw 13 threaded connection, fixed cover is equipped with the sprocket on the two-way screw 13, the meshing has same chain on two sprockets, the output shaft of motor 14 drives two-way screw 13 simultaneously rotations through the intermeshing of two sprockets and chain, and then thereby carry out the top to stay tube 5 through the threaded connection of two-way screw 13 and two movable block 12.

In this embodiment, stop gear includes changeing tub 10, changeing tub 10 thread bush has been seted up on ejector pin 6, changeing tub 10's bottom and has been seted up and rotate groove 15, rotate groove 15 and stay tube 5 rotation and be connected, equal fixed mounting has locating piece 16 on the both sides inner wall of changeing groove 15, annular spout 17 has been seted up in the outside of stay tube 5, two locating pieces 16 and annular spout 17 sliding connection, spacing groove 19 has all been seted up to the both sides of ejector pin 6, equal fixed mounting has stopper 18 on the both sides inner wall of stay tube 5, stopper 18 and corresponding spacing groove 19 sliding connection, annular spout 17 and two sliding connection of locating pieces 16, thereby can carry out spacingly between changeing tub 10 and the stay tube 5, and through spacing groove 19 and stopper 18 sliding connection, thereby carry out spacingly to ejector pin 6.

The working principle, during operation, pass through threaded connection of bolt 8 with connecting plate 7 and locating hole 9, thereby fix on corresponding bracing piece 3, restart motor 14 switch, the output shaft of motor 14 drives two bi-directional screw 13 simultaneously through the intermeshing of two sprocket and chain and rotates, and then thereby push away stay tube 5 through the threaded connection of bi-directional screw 13 and two movable blocks 12, thereby make stay tube 5 push away bracing piece 3 through changeing tub 10 and ejector pin 6, thereby guarantee the stability of hoist, when the supporting height of connecting plate 7 needs to be adjusted, at first demolish bolt 8 on the connecting plate 7, rotate changeing tub 10, changeing tub 10 through the threaded connection with ejector pin 6, and changeing tub 10 through annular spout 17 and locating piece 16's sliding connection, thereby can drive the length variation between ejector pin 6 and the stay tube 5, and then can drive connecting plate 7 and install the different positions on bracing piece 3, so as to adapt to the stability degree of tower crane of different heights, simultaneously the threaded connection of bi-directional screw 13 and movable block 12, can adjust the supporting angle of stay tube 5, the people can use conveniently.

Example two

The difference between the second embodiment and the first embodiment is that four symmetrically arranged placing grooves 20 are formed in the top of the bottom plate 1, positioning shafts 21 are installed on the inner wall of the bottom of the placing grooves 20, the positioning shafts 21 extend into the ground, baffle plates 22 are fixedly installed at the top ends of the positioning shafts 21, the baffle plates 22 are matched with the placing grooves 20, the stability of the bottom plate 1 and the base frame 2 can be improved due to the arrangement of the four positioning shafts 21, and therefore rollover phenomena of the base frame 2 and the supporting rods 3 can be avoided.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art will be able to apply equally to the technical solution of the present utility model and the inventive concept thereof, within the scope of the present utility model.

Claims (5)

1. The utility model provides a chassis that tower crane used, includes bottom plate (1), its characterized in that, the top fixed mounting of bottom plate (1) has bed frame (2), the top fixed mounting of bed frame (2) has bracing piece (3) that four symmetries set up, installs mount (4) between two bracing pieces (3) that correspond, the top rotation of bottom plate (1) is connected with four stay tubes (5) that the symmetry set up, sliding connection has ejector pin (6) on stay tube (5), rotation is connected with connecting plate (7) on ejector pin (6), is equipped with two bolts (8) on connecting plate (7), has seted up a plurality of locating holes (9) on bracing piece (3), bolt (8) and corresponding locating hole (9) threaded connection, be equipped with pushing mechanism on bottom plate (1), be equipped with stop gear on stay tube (5), stop gear and ejector pin (6) mutually support, pushing mechanism and stay tube (5) mutually support.

2. The underframe for the tower crane according to claim 1, characterized in that the pushing mechanism comprises a motor (14), the motor (14) is fixedly arranged on one side of the bottom plate (1), four symmetrically arranged sliding grooves (11) are formed in the top of the bottom plate (1), the same bidirectional screw (13) is rotationally connected to the corresponding two sliding grooves (11), a moving block (12) is slidingly connected to the inner wall of the sliding groove (11), and the corresponding two moving blocks (12) are in threaded connection with the same bidirectional screw (13).

3. The underframe for the tower crane according to claim 1, characterized in that the limiting mechanism comprises a rotating pipe (10), the rotating pipe (10) is sleeved with threads on the ejector rod (6), a rotating groove (15) is formed in the bottom end of the rotating pipe (10), the rotating groove (15) is rotationally connected with the supporting pipe (5), positioning blocks (16) are fixedly installed on the inner walls of the two sides of the rotating groove (15), an annular sliding groove (17) is formed in the outer side of the supporting pipe (5), and the two positioning blocks (16) are in sliding connection with the annular sliding groove (17).

4. The underframe for the tower crane according to claim 2, characterized in that the bidirectional screw (13) is fixedly sleeved with a chain wheel, and the two chain wheels are meshed with the same chain.

5. The underframe for a tower crane according to claim 3, characterized in that limiting grooves (19) are formed in two sides of the ejector rod (6), limiting blocks (18) are fixedly arranged on inner walls of two sides of the supporting tube (5), and the limiting blocks (18) are in sliding connection with the corresponding limiting grooves (19).

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