Lifting system and loading and unloading lifting machine

Abstract

The invention discloses a lifting system and a loading and unloading lifting machine, and relates to the technical field of lifting machines, in particular to the lifting system and the loading and unloading lifting machine, the lifting system comprises a cross beam, the near end of the cross beam is provided with a near-end guide wheel set, the far end of the cross beam is provided with a far-end guide wheel set, and the rotating shaft position of the far-end guide wheel set is provided with a pin shaft sensor; the traction rope is wound between the near-end guide wheel set and the far-end guide wheel set, the two ends of the traction rope are wound in the winding drum, and any section of the traction rope between the near-end guide wheel set and the far-end guide wheel set is wound in the combined pulley set. According to the lifting system and the loading and unloading lifting machine, the mode that the winch assembly is arranged at one end of the cross beam is adopted, the self weight of the walking trolley is reduced, the single traction rope is reused in the mode that the traction rope is turned and folded back at the far-end guide wheel set, and therefore the overall maximum lifting capacity of equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting machines, and more specifically, to a hoisting system. In addition, the present invention also relates to a loading and unloading hoisting machine comprising the hoisting system. Background Art

[0002] As a common equipment for cargo loading and unloading, the crane includes several parts such as the gantry, lifting mechanism, trolley and lifting frame. Among them, most of the lifting mechanisms are arranged on the trolley, which directly lifts the lifting frame, and then drives the trolley to move in the gantry to drive the lifting frame and the cargo to move together. Since the lifting mechanism is arranged in the trolley, the weight of the trolley increases, so the overall energy consumption of the equipment is large when the trolley and the cargo are moved, and the friction loss between the trolley and the gantry is also large;

[0003] Some hoists place the lifting equipment at one end of the gantry, and use a single or multiple traction ropes to connect directly to the lifting frame through the fixed pulley in the walking trolley. The limited load-bearing capacity of a single traction rope limits the maximum lifting capacity of the equipment. Using multiple traction ropes at the same time can increase the overall maximum lifting capacity, but there is a problem of concentrated force on a single traction rope due to uneven force, which poses a risk of breakage and affects the overall life of the equipment.

[0004] Moreover, with this arrangement, when the lifting frame lifts a heavy object, the traction rope will exert a large lateral force on the trolley, causing the trolley to tend to move toward the side where the lifting device is installed. Therefore, an additional limiting mechanism needs to be added, which makes the overall structure of the equipment complicated and increases the weight of the trolley.

[0005] In summary, how to solve the problem of high overall energy consumption of the equipment caused by the limited maximum lifting capacity of the crane and the heavy weight of the traveling trolley is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a lifting system, which adopts the form of arranging the winch assembly at one end of the crossbeam to reduce the deadweight of the traveling trolley, and by making the traction rope turn and return at the far end guide wheel group, the single traction rope can be reused, thereby improving the overall maximum lifting capacity of the equipment.

[0007] Another object of the present invention is to provide a loading and unloading crane including the above-mentioned lifting system, which has the same technical features and can solve the same technical problems.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A lifting system, comprising:

[0010] A crossbeam, wherein a proximal guide wheel group is arranged at the proximal end thereof, and a distal guide wheel group is arranged at the distal end thereof, and a pin sensor is arranged at the rotary axis position of the distal guide wheel group;

[0011] A traveling trolley, comprising a fixed pulley block and a traveling driving assembly with braking capability, wherein the traveling driving assembly is used to drive the traveling trolley to move along a preset track in the crossbeam;

[0012] The lifting frame comprises a movable pulley block, wherein the movable pulley block and the fixed pulley block form a combined pulley block;

[0013] A hoisting assembly, which is fixedly arranged at the proximal end of the crossbeam, comprises a drum, a traction rope and a power drive assembly for driving the drum to rotate;

[0014] Wherein, the traction rope is wound between the proximal guide wheel group and the distal guide wheel group, and both ends of the traction rope are wound in the drum, and any section of the traction rope between the proximal guide wheel group and the distal guide wheel group is wound in the combined pulley group.

[0015] Preferably, the travel drive assembly comprises a main travel wheel, an auxiliary travel wheel and a drive motor for driving the main travel wheel to rotate, the main travel wheel abuts against the top surface of the track in the crossbeam, and the auxiliary travel wheel abuts against two side surfaces of the track;

[0016] A brake assembly is arranged in the driving motor.

[0017] Preferably, the lifting frame further comprises a hook and a rotation drive assembly, and the rotation drive assembly is used to drive the hook and the movable pulley block to rotate relative to each other along the vertical axis.

[0018] Preferably, the lifting frame further comprises a fixed frame and a rotating frame;

[0019] The hook is relatively fixedly connected to the rotating frame, and the movable pulley block is relatively fixedly connected to the fixed frame;

[0020] The rotary drive assembly is used to drive the rotary frame to rotate relative to the fixed frame along a vertical axis, and a brake assembly is arranged inside the rotary drive assembly.

[0021] Preferably, the proximal end, the middle end and the distal end of the crossbeam are all provided with image acquisition components for multi-point positioning of the lifting frame and acquisition of the overall rotation angle of the lifting frame.

[0022] Preferably, at least four sets of mechanical arms are fixedly provided on the lower surface of the traveling trolley, and the mechanical arms are provided with guide assemblies for radially guiding the traction rope in the combined pulley block.

[0023] Preferably, the fixed pulley group includes a first fixed pulley group, a second fixed pulley group and a third fixed pulley group which are respectively arranged at the proximal end, the middle end and the distal end of the walking trolley, and the traction rope is passed around the first fixed pulley group, the movable pulley group, the second fixed pulley group, the movable pulley group and the third fixed pulley group in sequence.

[0024] Preferably, the first fixed pulley group, the second fixed pulley group and the third fixed pulley group each include two coaxial pulleys that rotate relatively, and the distances between the two pulleys in the first fixed pulley group, the second fixed pulley group and the third fixed pulley group are equal;

[0025] The movable pulley block includes four groups of coaxial pulleys that rotate relatively, and the traction line is wound between the pulleys in the fixed pulley block and the pulleys in the movable pulley block in sequence.

[0026] Preferably, the pulleys in the fixed pulley block and / or the movable pulley block include a wheel body and a core shaft, and the core shaft is relatively fixedly connected to a mounting frame of the movable pulley block or the fixed pulley block;

[0027] A self-aligning ball bearing is arranged between the wheel body and the core shaft;

[0028] The outer peripheries of the core shafts at both ends of the wheel body are respectively provided with elastic parts through limiting components, and the elastic parts are in contact with the end faces of the wheel body through thrust ball bearings.

[0029] A loading and unloading crane comprises the lifting system described in any one of the above items.

[0030] Compared with the prior art, the lifting system provided by the present invention has at least the following beneficial effects:

[0031] 1. Set the winch assembly at one end of the beam to reduce the weight of the trolley, thereby reducing the work done when the trolley and the cargo space move horizontally, reducing the overall energy consumption, and also reducing the wear between the trolley and the beam, thereby increasing the overall service life.

[0032] 2. By respectively arranging a proximal guide wheel group and a distal guide wheel group at both ends of the crossbeam, the traction line is wound between the fixed pulley groups at both ends, and the traction rope in the fixed pulley groups at both ends is wound in the combined pulley group, thereby realizing the single-line reuse of the traction rope and improving the maximum lifting capacity of the equipment. Moreover, since a single traction rope is wound between the fixed pulley groups at both ends, each section of the traction rope can be evenly stressed under the action of the fixed pulley groups at both ends, thereby avoiding the problem of breakage caused by concentrated force on a single section of the traction rope.

[0033] 3. At the same time, a pin sensor is arranged at the rotation axis of the remote guide wheel group, which can detect the radial force of the remote guide wheel group, that is, detect the tension in the traction rope, and finally calculate the weight of the hoisted goods, that is, realize the monitoring of the hoisting gravity.

[0034] The loading and unloading crane provided by the present invention includes the above-mentioned lifting system and has the same technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0036] Figure 1 This is a structural schematic diagram of the loading and unloading hoist provided by the present invention;

[0037] Figure 2 A schematic diagram of the winding method of the traction rope provided by the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the combination of the traveling trolley and the lifting frame provided by the present invention;

[0039] Figure 4 This is a front view of the traveling trolley provided by the present invention;

[0040] Figure 5 This is a side view of the traveling trolley provided by the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of the lifting frame provided by the present invention;

[0042] Figure 7 This is a schematic diagram of the installation method of the pulley provided by the present invention.

[0043] Figure 1-Figure 7 middle:

[0044] 1. Beam;

[0045] 2. Traveling trolley; 21. First fixed pulley block; 22. Second fixed pulley block; 23. Third fixed pulley block; 24. Traveling drive assembly; 25. Main traveling wheel; 26. Auxiliary traveling wheel;

[0046] 3. Lifting frame; 31. Hook; 32. Moving pulley block; 33. Fixed frame; 34. Rotating frame; 35. Rotating drive assembly;

[0047] 4. Near-end guide wheel set; 5. Far-end guide wheel set; 6. Winch assembly;

[0048] 71. Wheel body; 72. Mandrel; 73. Self-aligning ball bearing; 74. Thrust ball bearing; 75. First bracket; 76. Elastic member; 77. Second bracket; 78. Limiting assembly. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The core of the present invention is to provide a lifting system, which adopts the form of arranging the winch assembly at one end of the beam to reduce the deadweight of the traveling trolley, and by making the traction rope turn and return at the far end guide wheel group, a single traction rope can be reused, thereby improving the overall maximum lifting capacity of the equipment.

[0051] Another core of the present invention is to provide a loading and unloading crane including the above-mentioned lifting system, which has the same technical features and can solve the same technical problems.

[0052] Please refer to Figure 1-Figure 7 , a lifting system, comprising:

[0053] The crossbeam 1 has a proximal guide wheel set 4 at its proximal end and a distal guide wheel set 5 at its distal end, and a pin sensor is provided at the rotary axis position of the distal guide wheel set 5;

[0054] The traveling trolley 2 includes a fixed pulley block and a traveling driving assembly 24 with a braking capability, and the traveling driving assembly 24 is used to drive the traveling trolley 2 to move along a preset track in the crossbeam 1;

[0055] The lifting frame 3 includes a movable pulley block 32, and the movable pulley block 32 and the fixed pulley block form a combined pulley block;

[0056] A hoisting assembly 6, which is fixedly arranged at the proximal end of the crossbeam 1, comprises a drum, a traction rope and a power drive assembly for driving the drum to rotate;

[0057] Among them, the traction rope is wound between the proximal guide wheel group 4 and the distal guide wheel group 5, and both ends of the traction rope are wound in the drum, and any section of the traction rope between the proximal guide wheel group 4 and the distal guide wheel group 5 is wound in the combined pulley group.

[0058] like Figure 1 and Figure 2As shown, the winch assembly 6 is relatively fixedly arranged at one end of the beam 1, such as at the proximal end of the beam 1, and the lifting work is performed by combining the traction rope with the combined pulley group in the traveling trolley 2. Since the traveling trolley 2 is no longer equipped with the winch assembly 6, the weight of the traveling trolley 2 can be controlled. Therefore, the relative force between the traveling trolley 2 and the track in the beam 1 is reduced, and the friction between the two is reduced. Therefore, when the traveling trolley 2 moves on the track in the beam 1, the energy it needs to consume is reduced, that is, the energy consumption of the entire equipment can be controlled.

[0059] At the same time, a proximal guide wheel group 4 and a distal guide wheel group 5 are respectively arranged at the proximal end and the distal end of the crossbeam 1, the traction rope is wound between the proximal guide wheel group 4 and the distal guide wheel group 5, and any section of the traction rope between the proximal guide wheel group 4 and the distal guide wheel group 5 is wound in the age combination pulley group, so that a single traction rope is repeatedly wound between the proximal guide wheel group 4 and the distal guide wheel group 5, and then wound with the combination pulley group, so that the single traction rope can be reused, and then the pulling force is doubled, thereby improving the overall maximum lifting capacity of the equipment, and with the help of the guiding ability of the guide wheel group, the traction ropes on the upstream and downstream sides of the guide wheel group can be evenly stressed, avoiding the problem of breakage caused by concentrated force on a single traction rope, and effectively improving the overall service life of the equipment.

[0060] In some embodiments, Figure 2 As shown, after the traction rope passes around the proximal guide wheel group 4 and the combined pulley group in turn, it turns through the distal guide wheel group 5 and then turns back, and then passes around the combined pulley group and the proximal guide wheel group 4 in turn, and both ends of the traction rope are wound in the drum, so that the two sections of the traction rope enter the combined pulley group to do work, and then the tension on the single section of the traction rope is reduced by multiples. Since the traction rope turns at the distal guide wheel group 5, and the distal guide wheel group 5 has the ability to rotate, the internal tension of the two sections of the traction rope before and after the turning is consistent, avoiding the concentration of force on the unilateral traction rope.

[0061] In some embodiments, a pin sensor is provided at the rotating shaft position of the distal guide wheel group 5. The pin sensor can detect the radial force borne by the distal guide wheel group 5, that is, it can detect the tension in the traction rope, and then calculate the lifting weight in the lifting frame 3, thereby realizing real-time monitoring of the lifting weight.

[0062] It is worth noting that a brake assembly is provided in the winch assembly 6, which is used for braking the power drive assembly, or directly for braking the drum, so that the drum in the winch assembly 6 will not rotate when the traveling trolley 2 is moving, and the drum can remain stationary after the goods reach a predetermined height, thereby ensuring that the goods can be stably maintained at a predetermined height.

[0063] In some embodiments, the travel drive assembly 24 includes a main travel wheel 25, an auxiliary travel wheel 26 and a drive motor for driving the main travel wheel 25 to rotate, the main travel wheel 25 abuts against the top surface of the track in the beam 1, and the auxiliary travel wheel 26 abuts against the two side surfaces of the track;

[0064] A brake assembly is arranged inside the driving motor.

[0065] like Figure 1-Figure 5 As shown, a track is arranged in the longitudinal direction of the crossbeam 1, and the travel drive assembly 24 can drive the trolley 2 to move in the track, wherein the travel drive assembly 24 drives the main travel wheel 25 to rotate through the driving motor, and acts as a driving wheel to interact with the track, thereby driving the trolley 2 to move relative to the track, while the auxiliary travel wheel 26 acts as a passive wheel, rolling and abutting against the surfaces on both sides of the track, thereby preventing the trolley 2 from being displaced perpendicular to the length direction of the track, that is, preventing the trolley 2 from leaving the track;

[0066] At the same time, a braking assembly is provided in the travel drive assembly 24, preferably an electromagnetic braking assembly is provided in the drive motor, which can realize the braking of the main travel wheel 25. Its function is that when the drum in the winch assembly 6 winds or releases the traction rope, since the traction rope is wound in the combined pulley group, when the traction rope moves axially, it will inevitably drive the pulley in the combined pulley group to rotate, and then cause the travel trolley 2 to have a certain displacement trend. Therefore, by arranging a braking assembly in the travel drive assembly 24, the rotation of the main travel wheel 25 is suppressed, thereby avoiding the displacement of the travel trolley 2 during the lifting of heavy objects.

[0067] In some embodiments, the walking drive assembly 24 is arranged at the proximal end of the beam 1, and the walking drive assembly 24 includes a second traction rope, a distal guide wheel and a proximal guide wheel with power. The second traction rope forms a closed loop between the proximal guide wheel and the distal guide wheel. One section of the second traction rope between the proximal guide wheel and the distal guide wheel is relatively fixed to the walking trolley 2. When the proximal guide wheel is driven to rotate, the second traction rope is driven to rotate in a circle between the proximal guide wheel and the distal guide wheel, that is, the walking trolley 2 is driven to move in the track of the beam 1. It is worth noting that at least one place in the power drive of the proximal guide wheel or the distal guide wheel is provided with a brake assembly, which can brake the rotation of the proximal guide wheel or the distal guide wheel to prevent the proximal guide wheel and the distal guide wheel from rotating during the lifting of heavy objects. Even during the lifting of heavy objects, the walking trolley 2 can remain stationary.

[0068] In some embodiments, the lifting frame 3 further includes a hook 31 and a rotation drive assembly 35 , and the rotation drive assembly 35 is used to drive the hook 31 and the movable pulley block 32 to rotate relative to each other along the vertical axis.

[0069] like Figure 3 and Figure 6 As shown, by setting a rotating drive component 35, the hook 31 and the movable pulley group 32 can rotate relative to each other along the vertical axis direction. When it works, the lifting frame 3 can rotate the heavy object when lifting it, so as to facilitate the stacking of goods. For example, when loading and unloading containers at the dock, most containers are rectangular column structures. During the loading and unloading process, the rotating drive component 35 can drive the hook 31 and the lifted container to rotate 90° and then stack them, so that the container group can be stacked neatly.

[0070] In some embodiments, the lifting frame 3 further includes a fixed frame 33 and a rotating frame 34;

[0071] The hook 31 is relatively fixedly connected to the rotating frame 34, and the movable pulley block 32 is relatively fixedly connected to the fixed frame 33;

[0072] The rotation driving assembly 35 is used to drive the rotating frame 34 to rotate along the vertical axis relative to the fixed frame 33 . A braking assembly is disposed inside the rotation driving assembly 35 .

[0073] like Figure 6 As shown, the movable pulley block 32 is relatively fixedly connected to the fixed frame 33, the hook 31 is relatively fixedly connected to the rotating frame 34, the rotating frame 34 is relatively rotationally connected to the fixed frame 33 along the vertical axis, and the rotation drive assembly 35 is relatively fixed to the fixed frame 33. The rotation drive assembly 35 includes a driving motor, a gear arranged at the output shaft end of the driving motor, and a gear ring coaxially fixed to the rotating frame 34. The gear and the gear ring are meshed, and an electromagnetic brake assembly is arranged in the driving motor. When the driving motor is working, the gear and the gear ring can drive the rotating frame 34 to rotate relative to the fixed frame 33, that is, the hook 31 and the lifted cargo thereof can be driven to rotate.

[0074] In some embodiments, the proximal end, middle end and distal end of the beam 1 are provided with image acquisition components for multi-point positioning of the lifting frame 3 and acquisition of the overall rotation angle of the lifting frame 3 .

[0075] By setting image acquisition components at the near, middle and far positions of the beam 1, the distance between the hook 31 and each image acquisition component is calculated through a visual recognition algorithm, and then the actual position coordinates of the hook 31 and the lifted cargo are calculated. In addition, multiple image acquisition components can also monitor the rotation angle of the cargo to provide operators with a decision on whether to start the rotation drive component 35 in the lifting frame 3, and then adjust the angle of the cargo.

[0076] In some embodiments, the position coordinates of the hook 31 and the lifted cargo are calculated by calculating the displacement of the traveling trolley 2 and the retraction and extension of the traction rope, and the angle of the cargo is identified by an image acquisition component arranged at the lower end of the traveling trolley 2, which can also achieve the above-mentioned functions and should also fall within the protection scope of this application.

[0077] In some embodiments, at least four sets of mechanical arms are fixedly disposed on the lower surface of the traveling trolley 2, and the mechanical arms are provided with guide components for radially guiding the traction rope in the combined pulley block.

[0078] When the traction rope adopts single-line multiplexing, there are at least four sections of force-bearing traction ropes between the movable pulley group 32 and the fixed pulley group. Therefore, a group of mechanical arms are respectively arranged at the four corners of the walking trolley 2, and a guide component is arranged in the mechanical arm to guide the traction rope at the corresponding position. When the lifting frame 3 swings without the subjective control of the operator, the movement of the mechanical arm can be controlled to drive the position of the guide component to change, and then guide the traction rope to move in the opposite direction of the swing of the lifting frame 3, thereby eliminating the non-subjective control swing of the lifting frame 3, that is, reducing the swing of the goods during the lifting process and ensuring the stability of the lifting.

[0079] In some embodiments, the acceleration of the traveling trolley 2 during starting, running and stopping is controlled by an algorithm, such as realizing slow starting, constant speed movement and slow stopping, so as to reduce the swing of the goods during the lifting process.

[0080] In some embodiments, the fixed pulley group includes a first fixed pulley group 21, a second fixed pulley group 22 and a third fixed pulley group 23 which are respectively arranged at the proximal end, the middle end and the distal end of the walking trolley 2, and the traction rope is passed around the first fixed pulley group 21, the movable pulley group 32, the second fixed pulley group 22, the movable pulley group 32 and the third fixed pulley group 23 in sequence.

[0081] like Figure 2 and Figure 4 As shown, the fixed pulley group is divided into a first fixed pulley group 21, a second fixed pulley group 22 and a third fixed pulley group 23, and the three are respectively located at the proximal end, the middle end and the distal end of the walking trolley 2, so the three can generate three different directions of force on the lifting frame 3 through the traction rope, the resultant force of the three force components is balanced with the gravity of the lifting frame 3, and there is a part of the three force components that are in the horizontal direction and act opposite to each other, that is, it has a certain inhibitory effect on reducing the lateral swing of the lifting frame 3, and the multiple pulleys in the fixed pulley group can be arranged in a split-axis manner to avoid force concentration on a single axis.

[0082] In some embodiments, the first fixed pulley set 21, the second fixed pulley set 22 and the third fixed pulley set 23 each include two coaxial pulleys that rotate relative to each other, and the distances between the two pulleys in the first fixed pulley set 21, the second fixed pulley set 22 and the third fixed pulley set 23 are equal;

[0083] The movable pulley block 32 includes four groups of coaxial pulleys that rotate relatively, and the traction line is wound between the pulleys in the fixed pulley block and the pulleys in the movable pulley block 32 in sequence.

[0084] like Figure 3 and Figure 5 As shown, the traction line is wound in a single-line multiplexing manner, so each section of the traction rope between the proximal guide wheel group 4 and the distal guide wheel group 5 is separately wound in the combined pulley group; and the traction rope after the single-line multiplexing has a total of two sections of traction rope between the proximal guide wheel group 4 and the distal guide wheel group 5, and each section of the traction rope is separately wound with the pulleys on one side of the fixed pulley group and the movable pulley group 32, that is, the multiple traction points of the walking trolley 2 on the lifting frame 3 have a certain distance in the direction perpendicular to the beam 1, which has a certain effect on suppressing the swing of the lifting frame 3 in the direction perpendicular to the beam 1, and at the same time, the two pulleys in the same pulley group maintain a certain distance, which can avoid interference in the relative rotation of the two pulleys in the same pulley group, and avoid contact wear of adjacent traction ropes.

[0085] In some embodiments, the pulleys in the fixed pulley block and / or the movable pulley block 32 include a wheel body 71 and a core shaft 72, and the core shaft 72 is relatively fixedly connected to the mounting frame of the movable pulley block 32 or the fixed pulley block;

[0086] A self-aligning ball bearing 73 is provided between the wheel body 71 and the core shaft 72;

[0087] Elastic members 76 are respectively provided on the outer peripheries of the core shaft 72 at both ends of the wheel body 71 through limiting assemblies 78 , and the elastic members 76 abut against the end surface of the wheel body 71 through thrust ball bearings 74 .

[0088] like Figure 7 As shown, a self-aligning ball bearing 73 is coaxially arranged between the wheel body 71 and the core shaft 72 to ensure that the wheel body 71 and the core shaft 72 rotate relative to each other, while allowing the axis of the wheel body 71 and the core shaft 72 to have an angle, and the angle is variable, so as to meet the radial force acting on the traction rope caused by the movable pulley group 32 and the pulleys in the fixed pulley group not being in the same plane when the lifting frame 3 is rising or falling. The radial force will cause a large friction between the traction rope and the side wall of the track groove on the circumference of the wheel body. By adopting the self-aligning ball bearing 73 to assemble the wheel body 71 and the core shaft 72, an angle can be formed between the axes of the two, and the angle is variable, thereby reducing the angle of the plane where the fixed pulley group and the movable pulley group 32 slide, so as to reduce the friction between the traction rope and the side wall of the track groove on the outer periphery of the wheel body.

[0089] like Figure 7As shown, elastic parts 76 are assembled at both ends of the wheel body 71 through thrust ball bearings 74, wherein the elastic parts 76 can undergo axial compression deformation, thereby satisfying the requirement that the wheel body 71 deflects after being subjected to radial force. At the same time, when the radial force acting on the wheel body 71 is eliminated, it can be quickly reset under the action of the elastic parts 76.

[0090] like Figure 7 As shown, a first bracket 75 and a second bracket 77 are respectively provided at both end sides of the elastic member 76, wherein the first bracket 75 is relatively fixedly connected to the thrust ball bearing 74, and the second bracket 77 is relatively fixedly connected to the core shaft 72 through a limit assembly 78, thereby ensuring that the positions of the elastic member 76 and the core shaft 72 are relatively fixed.

[0091] In addition to the lifting systems disclosed in the above embodiments, the present invention also provides a loading and unloading crane including the above lifting system. For the structures of other parts of the loading and unloading crane, please refer to the prior art and will not be described in detail herein.

[0092] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0093] The above is a detailed introduction to the lifting system and loading and unloading crane provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A lifting system, characterized in that: include: A crossbeam (1), wherein a proximal guide wheel group (4) is provided at the proximal end thereof, and a distal guide wheel group (5) is provided at the distal end thereof, wherein a pin sensor is provided at the rotary axis position of the distal guide wheel group (5); A walking trolley (2) comprising a fixed pulley block and a walking drive assembly (24) having a braking capability, wherein the walking drive assembly (24) is used to drive the walking trolley (2) to move along a preset track within the crossbeam (1); The lifting frame (3) comprises a movable pulley block (32), wherein the movable pulley block (32) and the fixed pulley block form a combined pulley block; A hoisting assembly (6) fixedly arranged at the proximal end of the crossbeam (1), comprising a drum, a traction rope and a power drive assembly for driving the drum to rotate; The traction rope is wound between the proximal guide wheel group (4) and the distal guide wheel group (5), and both ends of the traction rope are wound in the drum, and any section of the traction rope between the proximal guide wheel group (4) and the distal guide wheel group (5) is wound in the combined pulley group.

2. The lifting system according to claim 1, characterized in that: The travel drive assembly (24) comprises a main travel wheel (25), an auxiliary travel wheel (26) and a drive motor for driving the main travel wheel (25) to rotate, the main travel wheel (25) abutting against the top surface of the track in the crossbeam (1), and the auxiliary travel wheel (26) abutting against two side surfaces of the track; A brake assembly is arranged in the driving motor.

3. The lifting system according to claim 1, characterized in that: The lifting frame (3) further comprises a hook (31) and a rotation drive assembly (35), wherein the rotation drive assembly (35) is used to drive the hook (31) and the movable pulley block (32) to rotate relative to each other along a vertical axis.

4. The lifting system according to claim 3, characterized in that: The lifting frame (3) further comprises a fixed frame (33) and a rotating frame (34); The hook (31) is relatively fixedly connected to the rotating frame (34), and the movable pulley block (32) is relatively fixedly connected to the fixed frame (33); The rotary drive assembly (35) is used to drive the rotary frame (34) to rotate along a vertical axis relative to the fixed frame (33); a brake assembly is provided in the rotary drive assembly (35).

5. The lifting system according to claim 1, characterized in that: The proximal end, the middle end and the distal end of the crossbeam (1) are all provided with image acquisition components for locating the lifting frame (3) at multiple points and acquiring the overall rotation angle of the lifting frame (3).

6. The lifting system according to claim 5, characterized in that: At least four sets of mechanical arms are fixedly arranged on the lower surface of the walking trolley (2), and the mechanical arms are provided with guide components for radially guiding the traction rope in the combined pulley block.

7. The lifting system according to claim 1, characterized in that: The fixed pulley group comprises a first fixed pulley group (21), a second fixed pulley group (22) and a third fixed pulley group (23) which are respectively arranged at the proximal end, the middle end and the distal end of the walking trolley (2), and the traction rope is passed through the first fixed pulley group (21), the movable pulley group (32), the second fixed pulley group (22), the movable pulley group (32) and the third fixed pulley group (23) in sequence.

8. The lifting system according to claim 7, characterized in that: The first fixed pulley group (21), the second fixed pulley group (22) and the third fixed pulley group (23) each include two coaxial pulleys that rotate relative to each other, and the distances between the two pulleys in the first fixed pulley group (21), the second fixed pulley group (22) and the third fixed pulley group (23) are equal; The movable pulley group (32) includes four groups of coaxial pulleys that rotate relatively, and the traction line is wound in sequence between the pulleys in the fixed pulley group and the pulleys in the movable pulley group (32).

9. The lifting system according to any one of claims 1 to 8, characterized in that: The pulleys in the fixed pulley block and / or the movable pulley block (32) comprise a wheel body (71) and a core shaft (72), and the core shaft (72) is relatively fixedly connected to a mounting frame of the movable pulley block (32) or the fixed pulley block; A self-aligning ball bearing (73) is provided between the wheel body (71) and the core shaft (72); The outer circumferences of the core shaft (72) at both ends of the wheel body (71) are respectively provided with elastic parts (76) via limiter assemblies (78), and the elastic parts (76) abut against the end surface of the wheel body (71) via thrust ball bearings (74).

10. A loading and unloading crane, characterized in that: A lifting system comprising any one of claims 1-9.

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