Centrally-driven four-lifting-point double-rope lifting type crane trolley

Abstract

The utility model provides a centrally-driven four-lifting-point double-rope lifting type crane trolley, which relates to the technical field of four-lifting-point crane trolleys, and comprises a construction platform and a track, the construction platform is provided with walking wheels and a driving assembly connected with the walking wheels, and the walking wheels are matched with the track; the device further comprises a double-shaft motor, a coupler, a first speed reducer, a second speed reducer, a first winding drum, a second winding drum, a pulley block and a mounting frame. According to the device, the local hoisting stress can be effectively dispersed through a double-rope four-point hoisting structure, so that the stress is uniformly distributed and dispersed, the breakage and abrasion of a steel wire rope or a pulley block caused by overlarge local stress are avoided, the hoisting process effect of the crane trolley is better, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of four-point lifting trolleys, and more specifically, to a centrally driven four-point double-rope lifting crane trolley. Background Technology

[0002] Bridge cranes include both bridge cranes and gantry cranes, both of which belong to the category of bridge-type cranes. A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also known as an overhead crane, gantry crane, or hoist.

[0003] Currently, a drum is installed on the crane trolley and connected to a drive device to drive the wire rope and the lifting device to lift and transfer the drum. However, the traditional single lifting point causes stress concentration during the lifting and transfer of the drum, which makes the wire rope or pulley block prone to breakage or deformation due to local overload. This results in greater safety hazards during the operation of the crane trolley and a shorter service life. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a centralized drive four-point double-rope lifting crane trolley.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A centrally driven four-point double-rope hoisting crane trolley includes a construction platform and a track. The construction platform is equipped with traveling wheels and a drive assembly connected to the traveling wheels, with the traveling wheels cooperating with the track. It also includes a dual-shaft motor, a coupling, a first reducer, a second reducer, a first drum, a second drum, a pulley block, a mounting frame, and wire ropes.

[0007] The dual-shaft motor is fixed on the construction platform;

[0008] The first and second reducers are fixed on the construction platform and are respectively connected to the two ends of the dual-shaft motor via couplings.

[0009] The first drum is rotatably connected to the construction platform and is also connected to the first reducer;

[0010] The second drum is rotatably connected to the construction platform and is also connected to a second reducer;

[0011] Two sets of pulley blocks are set on the construction platform and the installation frame, and steel wire ropes connected to the first drum and the second drum are wound on the two sets of pulley blocks respectively to form a double rope four-point suspension structure.

[0012] Furthermore, a set of pulleys includes a first fixed pulley, a second fixed pulley, a first movable pulley, and a second movable pulley. The first fixed pulley and the second fixed pulley are fixed on the construction platform, and the first movable pulley and the second movable pulley are fixed on the mounting frame. The left and right sides of the first drum / second drum are respectively provided with rope grooves in opposite directions, and the middle is fixed with a non-connected mounting platform. A rope pressing assembly is provided on the mounting platform. One end of the wire rope is fixed and wound in the left rope groove of the first drum / second drum by the left end rope pressing plate. The wire rope passes through the first movable pulley, the first fixed pulley, the second fixed pulley, and the second movable pulley in sequence. Then, the other end of the wire rope is wound in the right rope groove of the first drum / second drum and fixed by the right end rope pressing plate.

[0013] Furthermore, the rope pressing assembly includes a channel steel, a through hole, and a rope clamp. The channel steel is fixed on the mounting platform, and a through hole is opened on the channel steel. A rope clamp for locking the middle of the wire rope after leveling is installed in the through hole.

[0014] Furthermore, encoders are provided on both the first and second reels.

[0015] Furthermore, each of the four corners of the construction platform is provided with a plug, and the mounting frame is provided with multiple plugs that correspond one-to-one with and cooperate with the plugs.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] Compared to existing technologies, this device can effectively disperse local lifting stress through a double-rope four-point lifting structure, thereby making the stress distribution uniform and dispersed. This avoids the breakage and wear of wire ropes or pulley blocks caused by excessive local stress, resulting in better lifting process of the crane trolley and improved safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the mounting bracket;

[0020] Figure 3 This is a schematic diagram showing the connection between the wire rope and the pulley block;

[0021] Figure 4 This is a schematic diagram of the installation of the insert and the post;

[0022] Figure 5 for Figure 1 Enlarged view of section A (labeled A);

[0023] Figure label:

[0024] 1. Construction platform; 2. Dual-shaft motor; 3. Coupling; 4. First reducer; 5. Second reducer; 6. First drum; 7. Second drum; 8. Pulley block; 9. Mounting frame; 10. First movable pulley; 11. First fixed pulley; 12. Second fixed pulley; 13. Second movable pulley; 14. Insert cylinder; 15. Insert post; 16. Left end rope pressing plate; 17. Mounting platform; 18. Channel steel; 19. Rope clamp. Detailed Implementation

[0025] The technical solutions of the present utility model 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 utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0026] like Figures 1 to 5 As shown, a centrally driven four-point double-rope lifting crane trolley includes a construction platform 1 and a track (the track is not shown in the figure, but is actually an I-beam track). The construction platform 1 is equipped with traveling wheels and drive components connected to the traveling wheels (the traveling wheels and drive components are shown in the figure but are not labeled; their principle is prior art and will not be described). The traveling wheels cooperate with the track. The trolley also includes a dual-shaft motor 2, a coupling 3, a first reducer 4, a second reducer 5, a first drum 6, a second drum 7, a pulley block 8, a mounting frame 9, and wire ropes.

[0027] The dual-shaft motor 2 is fixed on the construction platform 1;

[0028] The first reducer 4 and the second reducer 5 are fixed on the construction platform 1 and are respectively connected to the two ends of the dual-shaft motor 2 through the coupling 3.

[0029] The first drum 6 is rotatably connected to the construction platform 1 and is connected to the first reducer 4;

[0030] The second drum 7 is rotatably connected to the construction platform 1 and is also connected to the second reducer 5;

[0031] Two sets of pulley blocks 8 are set on the construction platform 1 and the mounting frame 9, and steel wire ropes connected to the first drum 6 and the second drum 7 are wound on the two sets of pulley blocks 8 respectively to form a double rope four-point suspension structure (the steel wire ropes are shown in the figure without labels).

[0032] In a further refinement of the embodiment of this utility model, a lifting device is provided at the bottom of the mounting frame 9. The lifting device is not shown in the figure and is considered prior art and will not be improved.

[0033] Further refinements of the embodiments of this utility model, such as... Figures 1 to 3 As shown, a pulley group 8 includes a first fixed pulley 11, a second fixed pulley 12, a first movable pulley 10, and a second movable pulley 13. The first fixed pulley 11 and the second fixed pulley 12 are fixed on the construction platform 1, and the first movable pulley 10 and the second movable pulley 13 are fixed on the mounting frame 9. The left and right sides of the first drum 6 / second drum 7 are respectively provided with rope grooves in opposite directions, and the mounting platform 17 is fixed in the middle without being connected. A rope pressing assembly is provided on the mounting platform 17. One end of the wire rope is fixed and wound in the left rope groove of the first drum 6 / second drum 7 by the left end rope pressing plate 16. The wire rope passes through the first movable pulley 10, the first fixed pulley 11, the second fixed pulley 12, and the second movable pulley 13 in sequence. Then the other end of the wire rope is wound in the right rope groove of the first drum 6 / second drum 7 and fixed by the right end rope pressing plate (the right end rope pressing plate is shown in the figure but is not labeled).

[0034] A further refinement of the above embodiment is that the rope clamping assembly includes a channel steel 18, a through hole, and a rope clamp 19. The channel steel 18 is fixedly mounted on the mounting platform 17. A through hole is formed in the channel steel 18, and a rope clamp 19 is installed inside the through hole for locking the middle of the wire rope after leveling. The through hole is not shown in the figure. The rope clamping assembly allows for locking the middle of the wire rope after connection and balance adjustment (as per the attached instruction manual). Figure 3 (as shown in the image), thereby preventing the lifting point from tilting when lifting heavy objects later.

[0035] The working process of this utility model is as follows:

[0036] This application adopts a design where the rope is lowered on the same side of both the first drum 6 and the second drum 7, with a rope locking mechanism in the middle. The specific steps are as follows:

[0037] (1) When the wire rope needs to be wound, first press one end of the rope to the left end of the left half of the first drum 6 / second drum 7 at the rope pressing plate 16, as shown in the instruction manual. Figure 5 As shown;

[0038] (2) Then the rope is wound along the left half of the rope groove of the first drum 6 / second drum 7, and finally wound to the outer end of the left half of the first drum 6 / second drum 7.

[0039] (3) Then pull the wire rope out along the outer end of the left half of the first drum 6 / second drum 7 and wind it onto the first movable pulley 10, and then wind it onto the first fixed pulley 11, the second fixed pulley 12 and the second movable pulley 13 in sequence (the advantage of this rope winding method is that the four suspension points are connected in pairs, and the height of the four suspension points can be easily adjusted).

[0040] (4) Finally, the two wire ropes are wound into the reverse rope grooves of the right half of the first drum 6 / second drum 7 and pressed through the rope pressing plate at the right end of the right half of the first drum 6 / second drum 7. After the balance is corrected, the wire ropes can be locked in the middle through the rope pressing device to prevent the lifting point from being tilted due to uneven force on the load under the lifting device. Then, the dual-axis motor 2 can move the lifting device downward when it rotates forward and can move the lifting device upward when it rotates in reverse.

[0041] When the roller needs to be lifted, the controller immediately controls the dual-axis motor 2 to rotate forward, which then synchronously drives the first drum 6 and the second drum 7 to rotate. During this process, the speed of the first drum 6 and the second drum 7 can be adjusted by the reducer, and the speed of the two drums is always kept consistent. Then, in conjunction with the pulley block 8, the lifting device can be lowered at a preset speed. After the roller is lifted, the controller immediately controls the dual-axis motor 2 to rotate in reverse and, in conjunction with the pulley block 8, the roller can be raised. At this time, the double-rope four-point lifting structure can effectively disperse the local lifting stress, thereby making the stress distribution uniform and dispersed, thus avoiding the breakage and wear of the wire rope or pulley block 8 caused by excessive local stress, so as to make the lifting process of the crane trolley more effective and improve safety.

[0042] To further optimize the design and detect the rotation angle and speed of the first drum 6 and the second drum 7 in real time, encoders are installed on both the first drum 6 and the second drum 7 (not shown in the figure). In addition, the absolute encoders installed on the first drum 6 and the second drum 7 record the number of rotations of the drums, thereby monitoring the wire rope winding and unwinding length in real time, converting it into lifting device height data, and feeding it back to the control system (such as a PLC) to form a closed-loop control, thus further accurately limiting the lifting position of the lifting device.

[0043] To reduce the swaying of the wire rope during roller hoisting and transfer, further optimization of the solution is needed, such as... Figure 4 As shown, there are four insertion cylinders 14 on the four corners of the construction platform 1, and multiple insertion posts 15 on the mounting frame 9 that correspond to and cooperate with the insertion cylinders 14. By cooperating with the insertion cylinders 14 and the insertion posts 15, rigid sway can be reduced during the lifting process of the lifting device and the roller, thus making the lifting process safer. Specifically, when the lifting device descends, the insertion post 15 disengages from the insertion cylinder 14, and when the lifting device rises, the insertion post 15 cooperates with the insertion cylinder 14.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A centralized driving four-sling double-rope hoist trolley crane, comprising a construction platform (1) and a track, wherein the construction platform (1) is provided with traveling wheels and a driving assembly connected with the traveling wheels, and the traveling wheels are matched with the track, characterized in that, Also comprising a double-shaft motor (2), a coupling (3), a first speed reducer (4), a second speed reducer (5), a first winding drum (6), a second winding drum (7), a pulley block (8), a mounting frame (9), and a steel wire rope, The double-shaft motor (2) is fixedly arranged on the construction platform (1); The first speed reducer (4) and the second speed reducer (5) are fixedly arranged on the construction platform (1) and are connected to the two ends of the double-shaft motor (2) through the coupling (3); The first winding drum (6) is rotatably connected to the construction platform (1) and is connected with the first speed reducer (4); The second winding drum (7) is rotatably connected to the construction platform (1) and is connected with the second speed reducer (5); Two groups of pulley blocks (8) are arranged on the construction platform (1) and the mounting frame (9), and the two groups of pulley blocks (8) are respectively wound with the steel wire ropes connected with the first winding drum (6) and the second winding drum (7) to form a double-rope four-suspension-point structure.

2. A trolley for a centrally driven four-point double-rope hoist crane according to claim 1, characterized in that One group of the pulley blocks (8) comprises a first fixed pulley (11), a second fixed pulley (12), a first movable pulley (10), and a second movable pulley (13), the first fixed pulley (11) and the second fixed pulley (12) are fixedly arranged on the construction platform (1), the first movable pulley (10) and the second movable pulley (13) are fixedly arranged on the mounting frame (9), the left and right sides of the first winding drum (6) / the second winding drum (7) are respectively provided with rope grooves with opposite directions and a middle part of which is fixedly arranged with a mounting platform (17) to be spaced and not connected, the mounting platform (17) is provided with a rope pressing assembly, one end of the steel wire rope is fixed and wound in the left rope groove of the first winding drum (6) / the second winding drum (7) through a left end rope pressing plate (16), the steel wire rope passes through the first movable pulley (10), the first fixed pulley (11), the second fixed pulley (12), and the second movable pulley (13) in sequence, and then the other end of the steel wire rope is wound in the right rope groove of the first winding drum (6) / the second winding drum (7) and is fixed through a right end rope pressing plate.

3. A centrally driven four-point suspension trolley for a double-rope hoist, according to claim 2, characterized in that, The rope pressing assembly comprises a channel steel (18), a through hole, and a rope clamp (19), the mounting platform (17) is fixedly arranged with the channel steel (18), the channel steel (18) is provided with the through hole, and the rope clamp (19) for locking the middle part of the steel wire rope after leveling is arranged in the through hole.

4. A centrally driven four-point suspension trolley for a double-rope hoist, according to claim 1, characterized in that, The first winding drum (6) and the second winding drum (7) are both provided with encoders.

5. A centrally driven four-point suspension trolley for a double-rope hoist, according to claim 1, characterized in that, The construction platform (1) is provided with a plurality of insertion columns (15) corresponding to the insertion columns (14) and matched with the insertion columns (14) on the mounting frame (9).

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