Crane carriage for tower crane

Abstract

The utility model provides a crane carriage for a tower crane, and belongs to the technical field of cranes. A crane carriage for a tower crane comprises a carriage frame, a first transmission assembly is connected to the carriage frame, the first transmission assembly comprises a pulley shaft connected to the carriage frame and a plurality of pulley assemblies arranged on the pulley shaft, and the pulley shaft is in sliding fit with the pulley assemblies; the frame comprises a front cross beam and a rear cross beam which are symmetrically arranged, clamping plates are symmetrically connected to the front side and the rear side of each cross beam, and connecting plates are connected between the two clamping plates on each same cross beam in a bilateral symmetry mode through first pin shafts; two balance wheel frame assemblies are symmetrically connected between the connecting plate located on the front side and the connecting plate located on the rear side through second pin shafts, and idler wheels are symmetrically arranged on the balance wheel frame assemblies. And a screw rod is also fixed between the two clamping plates on each same cross beam. The device has the advantages that the total load is uniformly distributed, and the service life of the device is prolonged. And the method is simple.

Description

Technical Field

[0001] This utility model belongs to the field of crane technology, specifically a lifting trolley for a tower crane. Background Technology

[0002] Tower cranes are crucial pieces of machinery in industrial infrastructure, bridges, and other infrastructure projects. They are equipped with trolleys that can move rapidly along steel cables for transporting and moving equipment. However, existing trolleys only have four wheels. For tower cranes with large lifting capacities, this four-wheel design can easily lead to excessive loads on any one wheel, potentially causing damage and shortening the crane's lifespan. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a lifting trolley for tower cranes, which has the advantages of uniform load distribution and extended device lifespan.

[0004] The objective of this utility model can be achieved through the following technical solution: a lifting trolley for a tower crane, comprising a frame, wherein a first transmission assembly is connected to the frame.

[0005] The first transmission assembly includes a pulley shaft connected to the frame and a plurality of pulley assemblies arranged on the pulley shaft, wherein the pulley shaft and the plurality of pulley assemblies are in sliding engagement.

[0006] The frame includes two symmetrically arranged crossbeams at the front and rear. Each crossbeam has a first clamping plate symmetrically connected to its front and rear sides, and the two first clamping plates on the same crossbeam are symmetrically connected to each other by a first pin.

[0007] Two balance wheel frame assemblies are symmetrically connected between the connecting plate located on the front side and the connecting plate located on the rear side via a second pin, and rollers are symmetrically arranged on the balance wheel frame assembly;

[0008] A screw is also fixed between the two plates on each of the same crossbeams.

[0009] Preferably, the frame has four balance wheel frame assemblies, each of which is equipped with two rollers.

[0010] Preferably, each of the crossbeams is symmetrically equipped with a tripod, and each tripod is equipped with a lateral wheel mechanism.

[0011] Preferably, the lateral wheel mechanism includes a third pin, a second clamping plate, and a lateral wheel assembly. Two second clamping plates are symmetrically arranged on the tripod body. A third pin is installed between the second clamping plate and the other second clamping plate. The lateral wheel assembly is installed on the third pin.

[0012] Preferably, the tripod body is also equipped with a snap-fit ​​bracket, and one side of the crossbeam is rotatably connected to a safety valve rod in the forward or backward direction, and the safety valve rod is snapped into the snap-fit ​​bracket for limiting engagement.

[0013] Preferably, a rope retainer is installed between one of the crossbeams and the other crossbeam, and the rope retainer has a rope retainer bar for preventing the cable from winding around an excessively large outer diameter.

[0014] Compared with the prior art, the advantages of this utility model are: by adding a secondary swing frame mechanism on the basis of a primary swing frame mechanism, doubling the number of rollers, and setting a first pin on the connecting plate of the primary swing frame mechanism, and then setting a secondary swing frame mechanism and several rollers on it, the total load is evenly distributed among the 16 wheels, which helps to prevent a single roller from being subjected to a large load, thus preventing damage and improving the service life of the device. Attached Figure Description

[0015] Figure 1 This is a front view of the present invention.

[0016] Figure 2 This is a top view of the present invention.

[0017] Figure 3 This is a cross-sectional view of segment AA of this utility model.

[0018] Figure 4 This is a cross-sectional view of segment BB in this utility model.

[0019] Figure 5 This is an enlarged view of section J in this utility model.

[0020] In the diagram, 2 is the frame; 31 is the pulley axle; 32 is the pulley assembly; 4 is the crossbeam; 41 is the first clamping plate; 42 is the first pin; 43 is the connecting plate; 44 is the triangular frame; 451 is the third pin; 452 is the second clamping plate; 453 is the side wheel assembly; 51 is the second pin; 52 is the swing wheel frame assembly; 53 is the roller; 61 is the clamping bracket; 62 is the safety valve stem; 71 is the rope retainer; 72 is the rope retainer rod; and 8 is the screw. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1 to 5 As shown, a lifting trolley for a tower crane includes a frame 2. A first transmission assembly is connected to the frame 2. The first transmission assembly includes a pulley shaft 31 connected to the frame 2 and a plurality of pulley assemblies 32 arranged on the pulley shaft 31. The pulley shaft 31 and the plurality of pulley assemblies 32 are slidably engaged. The frame 2 includes two symmetrically arranged crossbeams 4. Each crossbeam 4 has a clamping plate symmetrically connected to its front and rear sides. The two clamping plates on each crossbeam 4 are symmetrically connected to each other by a first pin 42 with connecting plates 43 on the left and right sides. The connecting plate 43 on the front side and the connecting plate 43 on the rear side are symmetrically connected by a second pin 51 with two swing wheel frame assemblies 52. Rollers 53 are symmetrically arranged on the swing wheel frame assemblies 52. A screw 8 is also fixed between the two clamping plates on each crossbeam 4.

[0023] The frame 2 has four balance wheel frame assemblies 52, and each balance wheel frame assembly 52 is equipped with two rollers 53.

[0024] With the above structure, in this utility model, the two connecting plates 43 connected by the first pin 42 on the front and rear plates together constitute a primary swing frame mechanism. The frame 2 has two primary swing frame mechanisms, and two swing wheel frame assemblies 52 are installed on one primary swing frame mechanism. Each swing wheel frame assembly 52 is symmetrically provided with two rollers 53, which together constitute a secondary swing frame mechanism. This structural design is advantageous because by adding a secondary swing frame mechanism on the basis of a primary swing frame mechanism, the number of rollers 53 is doubled. At the same time, the first pin 42 is provided on the connecting plate 43 of the primary swing frame mechanism, and the secondary swing frame mechanism and several rollers 53 are set on it, the total load is evenly distributed among the 16 rollers 53. This helps to prevent a single roller 53 from being subjected to a large load, which would cause it to be damaged, and helps to improve the service life of the device.

[0025] like Figures 1 to 5 As shown, each of the crossbeams 4 is symmetrically equipped with a triangular frame 44, and each triangular frame 44 is equipped with a side wheel mechanism. The side wheel mechanism includes a third pin 451, a second clamping plate 452, and a side wheel assembly 453. Two second clamping plates 452 are symmetrically arranged on the triangular frame 44, and a third pin 451 is installed between the second clamping plate 452 and the other second clamping plate 452. The side wheel assembly 453 is installed on the third pin 451. By setting the side wheel assembly 453, it is beneficial to control the turning of the machine body. It is usually located on both sides of the machine body, and the operator can control the steering of the left and right wheels, thereby realizing the turning of the frame 2. The crane has the ability to turn and travel, improving the flexibility of the machine body.

[0026] like Figures 1 to 5As shown, a snap-fit ​​bracket 61 is also installed on the tripod body 44. A safety valve rod 62 is rotatably connected to one side of the crossbeam 4 in a forward or backward direction. The safety valve rod 62 is engaged with the snap-fit ​​bracket 61 for limiting and locking. By setting the safety valve rod 62, when it is necessary to balance and fix the frame 2 at the predetermined lifting position, engaging the safety valve rod 62 with the snap-fit ​​bracket 61 facilitates the start and stop of the device, further securing and protecting the device, and preventing the device from moving back and forth on the crane.

[0027] like Figures 1 to 5 As shown, a rope retainer 71 is installed between one of the crossbeams 4 and the other crossbeam 4, and the rope retainer 71 has a rope retainer bar for preventing the cable from winding around an excessively large outer diameter.

[0028] By setting up the rope retainer 71, it is beneficial to prevent the cable from flying off the pulley assembly 32, ensure the cable is coiled on the pulley assembly 32, and improve the coiling quality of the cable.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0031] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0032] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A tower crane trolley comprising a trolley frame (2), a first transmission assembly connected to the trolley frame (2), the first transmission assembly comprising a pulley shaft (31) connected to the trolley frame (2) and a plurality of pulley assemblies (32) arranged on the pulley shaft (31), the pulley shaft (31) being in sliding fit with the plurality of pulley assemblies (32); the trolley frame (2) comprising two symmetrical cross beams (4), each of the cross beams (4) being symmetrically connected with a first clamping plate (41) on both sides, and two first clamping plates (41) on each cross beam (4) being symmetrically connected with a connecting plate (43) through a first pin shaft (42); two swing frame assemblies (52) being symmetrically connected between the connecting plate (43) on the front side and the connecting plate (43) on the rear side through a second pin shaft (51), the swing frame assemblies (52) being symmetrically provided with a roller (53); each of the cross beams (4) being further provided with a screw rod between the two clamping plates.

2. A trolley for a tower crane according to claim 1, characterized in that The trolley frame (2) is provided with four swing frame assemblies (52), each of the swing frame assemblies (52) being provided with two rollers (53).

3. A trolley for a tower crane according to claim 2, characterised in that Each of the cross beams (4) is symmetrically provided with a tripod body (44), the tripod body (44) being provided with a lateral wheel mechanism.

4. A trolley for a tower crane according to claim 1, characterized in that The lateral wheel mechanism comprises a third pin shaft (451), a second clamping plate (452) and a lateral wheel assembly (453), the tripod body (44) being symmetrically provided with two second clamping plates (452), the second clamping plate (452) being provided with the third pin shaft (451) between the other second clamping plate (452), and the third pin shaft (451) being provided with the lateral wheel assembly (453).

5. A trolley for a tower crane according to claim 1, characterized in that The tripod body (44) is further provided with a clamping frame (61), one side of the cross beam (4) being rotatably connected with the first pin shaft (42) in the forward or rearward direction, the first pin shaft (42) being limitingly clamped with the clamping frame (61).

6. A trolley for a tower crane according to claim 1, characterized in that One of the cross beams (4) is provided with a rope blocking frame (71) between the other cross beam (4), the rope blocking frame (71) being provided with a rope blocking rod (8) for preventing the cable from being wound outside the diameter.

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