A hoisting device for transporting large parts

Abstract

The present invention discloses a hoisting device for transporting large components, which includes a horizontally fixed track, a large vehicle body, and a small vehicle body. A wheel I is arranged on the large vehicle body, and the wheel I is in rolling connection with the horizontally fixed track. A wheel II is arranged on the small vehicle body, and the wheel II is in rolling connection with the large vehicle body. A braking device I is arranged on the large vehicle body, and the braking device I is used to brake the wheel I. A braking device II is arranged on the small vehicle body, and the braking device II is used to brake the wheel II. Beneficial effects: The hoisting device for transporting large components in this application uses electromagnetic braking instead of traditional drum brakes, does not reduce the wheel speed by mechanical friction, so it has low noise and there is no problem of rapid wear. Maintenance is simple, convenient, has a long cycle, and low cost.

Description

Technical Field

[0001] The present invention relates to the field of hoisting and transportation machinery, and particularly to a hoisting device for transporting large parts. Background Art

[0002] A bridge crane is a hoisting device that spans over workshops, warehouses, and yards for material hoisting. Since its two ends are seated on tall cement columns or metal brackets and it resembles a bridge in shape, it gets its name. The bridge of the bridge crane runs longitudinally along the tracks laid on both sides of the elevated structures, and can make full use of the space under the bridge to hoist materials without being hindered by ground equipment. It is the most widely used and most numerous type of hoisting machinery.

[0003] In the prior art, the braking system of bridge cranes generally adopts drum brakes. As shown in patents such as those with publication numbers CN118602039A, CN202429908U, CN200961085Y, etc., drum brakes are technically mature, low in cost, and reliable in braking, and are the mainstream braking systems on current bridge cranes.

[0004] However, if the materials hoisted by a bridge crane are large parts with large weight and volume, the disadvantages of drum brakes will become prominent. First, it is easy to cause the large parts to swing during the braking process, posing a production safety risk. Second, it generates harsh noises during the braking process, polluting the working environment in the workshop and factory building. Because the large parts are heavy and large in volume, they have a large hoisting inertia and are difficult to stop. Sometimes, even though the drum brake significantly reduces the rotational speed of the wheels rolling on the tracks of the bridge crane, the huge inertial swing of the large parts will drive the wheels to continue to slide slightly on the tracks for a certain distance before stopping, and emit harsh noises, causing abnormal wear of the tracks and wheels. Although the inertial swing amplitude of the large parts during braking can be reduced by lowering the hoisting speed, excessive reduction in the hoisting speed will affect the overall hoisting work efficiency of the bridge crane. Therefore, in fact, the reduction amplitude of the hoisting speed is very limited. In order to ensure reliable braking, the braking force of the drum brake is generally designed to be relatively large, and during the braking process, it is easy for the wheel speed to drop sharply, causing the large parts to swing due to inertia and driving the wheels to slide abnormally, while emitting harsh braking noises.

[0005] In addition, when the materials hoisted by a bridge crane are large parts with large weight and volume, the service life of the drum brake will be significantly shortened, especially the brake shoes wear very quickly. At this time, the maintenance period of the braking system of the bridge crane is short and the maintenance frequency is high, which not only delays the hoisting production but also increases the maintenance cost. Summary of the Invention

[0006] The main object of the present invention is to provide a hoisting device for transporting large parts, aiming to solve the problems existing in the existing hoisting devices mentioned in the above background technology, such as the large parts are prone to swing during braking, the braking noise is large, the maintenance period of the braking system is short, the frequency is high, and the cost is high.

[0007] To solve the above problems, the present invention provides a hoisting device for transporting large parts, including a horizontal fixed track, a large vehicle body, and a small vehicle body. A wheel I is provided on the large vehicle body, and the wheel I is in rolling connection with the horizontal fixed track. A wheel II is provided on the small vehicle body, and the wheel II is in rolling connection with the large vehicle body. A braking device I is provided on the large vehicle body, and the braking device I is used to brake the wheel I. A braking device II is provided on the small vehicle body, and the braking device II is used to brake the wheel II;

[0008] The braking device I and the braking device II have the same structure;

[0009] The braking device I includes:

[0010] A rotating ring, coaxially and fixedly connected to the axle drivingly connecting the wheel I. A plurality of permanent magnets are evenly distributed on the outer circumferential surface of the rotating ring;

[0011] A fixed ring, fixedly connected to the large vehicle body and coaxial with the rotating ring. The inner diameter of the fixed ring is larger than the outer diameter of the rotating ring. An electromagnet is slidably installed on the inner circumferential surface of the fixed ring. The electromagnet is connected with a spring. When the rotating ring drives the permanent magnets to rotate close to the electromagnet, the energized electromagnet repels the like poles of the permanent magnets. Under the action of the electromagnetic repulsive force, the electromagnet slides away from the permanent magnets and compresses the spring. After the permanent magnets rotate away from the electromagnet, the compressed spring pushes the electromagnet to slide back to its original position;

[0012] The rotating ring of the braking device II is coaxially and fixedly connected to the axle drivingly connecting the wheel II;

[0013] The fixed ring of the braking device II is fixedly connected to the small vehicle body.

[0014] In one embodiment, one pole of the permanent magnet is located inside the rotating ring, and the other pole of the permanent magnet is located outside the rotating ring, and the other pole of the permanent magnet does not contact the inner wall of the fixed ring.

[0015] In one embodiment, the electromagnet slides close to or away from the outer wall of the fixed ring.

[0016] In one embodiment, when the permanent magnet does not approach the electromagnet, the spring is not compressed. At this time, one pole of the electromagnet is located inside the fixed ring, and the other pole of the electromagnet extends from the inner circumferential surface of the fixed ring and approaches the outer circumferential surface of the rotating ring.

[0017] In one embodiment, there are multiple electromagnets, which are centrosymmetrically distributed on the fixed ring with the central axis of the fixed ring as the center.

[0018] In one embodiment, mounting holes are provided on the inner circumferential surface of the fixed ring. The spring is located at the bottom of the mounting hole. The electromagnet is slidably inserted into the mounting hole and connected to the spring.

[0019] In one embodiment, a coil cylinder is fixedly inserted into the mounting hole. An inductance coil is embedded in the coil cylinder. The electromagnet is slidably inserted into the coil cylinder.

[0020] In one embodiment, a piezoelectric power generation plate is installed at the bottom of the mounting hole. The two ends of the spring are respectively connected to the piezoelectric power generation plate and the electromagnet.

[0021] In one embodiment, there is a pair of fixed rings, which are fastened and fixedly connected. Mounting grooves are provided on one side surface of each fixed ring. After the two fixed rings are fastened and fixedly connected, the two mounting grooves form the mounting hole.

[0022] In one embodiment, a hoisting device for transporting large parts further includes an electric hoist, a hook, a tension sensor, and a rotational speed sensor. The electric hoist is installed on the small vehicle body. The electric hoist is connected to a fixed pulley through a lifting rope. The fixed pulley is connected to the hook through the tension sensor. The weight of the object suspended by the hook is detected through the tension sensor. The rotational speed sensor is used to detect the rotational speeds of the first wheel and the second wheel.

[0023] Beneficial effects: The hoisting device for transporting large parts in this application uses electromagnetic braking to replace the traditional drum brake, does not reduce the wheel speed by mechanical friction, so the noise is small, and there is no problem of relatively fast wear. The maintenance is simple, convenient, has a long cycle, and low cost;

[0024] The hoisting device for transporting large parts in this application can dynamically adjust the electromagnetic braking force according to the wheel rotational speed, and can continuously maintain the maximum dynamic electromagnetic braking force without causing inertial swing of large parts during the braking process, minimizing the braking time and distance. The braking time and distance are short, which can meet the braking requirements for transporting large parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1It is the front view of a hoisting device for transporting large parts in the present invention. In the figure, to clearly show the structure of the braking device 1, the speed reducer 1 and the wheel 1 at the right end of the large vehicle body are hidden;

[0027] Figure 2 It is the right view of a hoisting device for transporting large parts in the present invention;

[0028] Figure 3 It is the internal structure diagram of the braking device in the present invention;

[0029] Figure 4 It is the schematic diagram when the sliding displacement of the electromagnet is the largest;

[0030] Figure 5 It is the schematic diagram when the permanent magnet leaves the electromagnet and the electromagnet slides and gradually resets;

[0031] Figure 6 It is the front view of the braking device in the present invention;

[0032] Figure 7 It is the top view of the rotating ring in the present invention;

[0033] Figure 8 It is the top view of the fixed ring in the present invention;

[0034] Figure 9 It is the installation schematic diagram of the inductance coil and the pressure generating plate.

[0035] The description of the reference numerals in the drawings is as follows:

[0036] 1. Horizontal fixed track; 2. Large vehicle body; 3. Braking device 1; 301. Rotating ring; 302. Permanent magnet; 303. Shaft hole; 304. Fixed ring; 305. Installation groove; 306. Spring; 307. Electromagnet; 308. Wire; 309. Threading hole; 310. Fixed hole; 311. Coil cylinder; 312. Inductance coil; 313. Pressure generating plate;

[0037] 4. Speed reducer 1; 5. Wheel 1; 6. Speed sensor 1; 7. Small vehicle body; 8. Braking device 2; 9. Speed reducer 2; 10. Wheel 2; 11. Speed sensor 2; 12. Hoisting rope; 13. Hook; 14. Tension sensor; 15. Fixed pulley. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0040] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0042] The present invention provides a hoisting device for transporting large components. This hoisting device for transporting large components uses electromagnetic braking to replace the traditional drum brake, does not use mechanical friction to reduce the wheel speed, so it has low noise and does not have the problem of fast wear. Maintenance is simple, convenient, has a long cycle, and low cost.

[0043] In addition, the hoisting device for transporting large components of the present application can dynamically adjust the electromagnetic braking force according to the wheel speed, so as to continuously maintain the maximum dynamic electromagnetic braking force without causing inertial swing of large components during the braking process, minimize the braking time and distance. The braking time and distance are short, which can meet the braking requirements for transporting large components.

[0044] Specifically, in an embodiment of the invention, as Figure 1 and Figure 2As shown, the hoisting device for transporting large parts includes a horizontally fixed track 1, a large vehicle body 2, and a small vehicle body 7. A first wheel 5 is provided on the large vehicle body 2. The horizontally fixed track 1 is horizontally fixed in the factory workshop. The first wheel 5 is in rolling connection with the horizontally fixed track 1. The large vehicle body 2 moves along the horizontally fixed track 1 through the first wheel 5. A second wheel 10 is provided on the small vehicle body 7. The second wheel 10 is in rolling connection with the large vehicle body 2. The small vehicle body 7 moves horizontally on the large vehicle body 2 through the second wheel 10, and the moving direction is perpendicular to the moving direction of the large vehicle body 2. An electric hoist is installed on the small vehicle body 7. The electric hoist is connected to a fixed pulley 15 through multiple lifting ropes 12. A hook 13 is installed at the lower end of the fixed pulley 15. Control the movement of the large vehicle body 2 and the small vehicle body 7 to drive the hook 13 to first translate to the lifting position, and then control the electric hoist to drive the hook 13 to descend to perform the operation of transporting large parts.

[0045] In this embodiment, as Figure 1 and Figure 2 shown, a first braking device 3 is provided on the large vehicle body 2. The first braking device 3 is used to brake the first wheel 5. A second braking device 8 is provided on the small vehicle body 7. The second braking device 8 is used to brake the second wheel 10. The first braking device 3 and the second braking device 8 have the same structure, and the volumes of the first braking device 3 and the second braking device 8 can be different.

[0046] Furthermore, for the convenience of installing and arranging the first braking device 3 and the second braking device 8, as Figure 1 and Figure 2 shown, the hoisting device for transporting large parts further includes a first speed reducer 4 and a second speed reducer 9. The first speed reducer 4 is fixedly connected to and in transmission connection with the first braking device 3. The first braking device 3 is fixedly connected to the large vehicle body 2. The first wheel 5 is in transmission connection with the first speed reducer 4. The first speed reducer 4 drives the first wheel 5 to rotate. The input shaft of the first speed reducer 4 is in transmission connection with the first braking device 3. The input shaft of the first speed reducer 4 is braked through the first braking device 3, and then the first wheel 5 is braked.

[0047] Similarly, the second speed reducer 9 is fixedly connected to and in transmission connection with the second braking device 8. The second braking device 8 is fixedly connected to the small vehicle body 7. The second wheel 10 is in transmission connection with the second speed reducer 9. The second speed reducer 9 drives the second wheel 10 to rotate. The input shaft of the second speed reducer 9 is in transmission connection with the second braking device 8. The input shaft of the second speed reducer 9 is braked through the second braking device 8, and then the second wheel 10 is braked.

[0048] In this embodiment, the purpose of setting the speed reducer is not only to facilitate the installation and arrangement of the wheels and braking devices, but also to facilitate the arrangement of the first speed sensor 6 and the second speed sensor 11, as Figure 1 and Figure 2As shown, the first rotational speed sensor 6 is provided on the first reduction gearbox 4, and the second rotational speed sensor 11 is provided on the second reduction gearbox 9. The rotational speed of the first wheel 5 is detected by the first rotational speed sensor 6, and the rotational speed of the second wheel 10 is detected by the second rotational speed sensor 11, providing a reference for subsequently adjusting the magnetic force of the electromagnet 307 in real time.

[0049] In addition, as Figure 1 and Figure 2 described, the fixed pulley 15 is connected to the hook 13 through the tension sensor 14. The weight of the object suspended by the hook 13 is detected by the tension sensor 14. Then, the weight detection data and the wheel rotational speed data are transmitted to the processor together. The processor analyzes and processes them, and then adjusts the magnitude of the current flowing through the electromagnet 307 to achieve the purpose of dynamically adjusting the electromagnetic braking force, realizing the continuous maintenance of the maximum dynamic electromagnetic braking force without causing inertial swing of large components during the braking process, minimizing the braking time and distance. The short braking time and distance can meet the braking requirements for the transfer of large components.

[0050] In this embodiment, as Figures 3 - 8 described, the first braking device 3 includes: a rotating ring 301 and a fixed ring 304. A shaft hole 303 is provided on the rotating ring 301. The rotating ring 301 is coaxially and fixedly connected through the shaft hole 303 to the axle drivingly connected to the first wheel 5, that is, the input shaft of the reduction gearbox. In this way, when the wheel rotates, it drives the rotating ring 301 to rotate, and braking the rotating ring 301 can brake the wheel.

[0051] In this embodiment, as Figures 3 - 7 shown, a plurality of permanent magnets 302 are evenly distributed on the outer circumferential surface of the rotating ring 301. One pole of the permanent magnet 302 is located inside the rotating ring 301, and the other pole of the permanent magnet 302 is located outside the rotating ring 301, so that the permanent magnet 302 and the energized electromagnet 307 can generate electromagnetic repulsion force. With the help of the electromagnetic repulsion force, the rotational speed of the rotating ring 301 is decreased to brake the wheel. The other pole of the permanent magnet 302 does not contact the inner wall of the fixed ring 304. Such a design can avoid frictional noise.

[0052] In this embodiment, preferably, only one corner of the other pole of the permanent magnet 302 is located outside the rotating ring 301. With such a design, the permanent magnet 302 is not arranged radially along the rotating ring 301, which is beneficial for the permanent magnet 302 to generate electromagnetic repulsion force with the energized electromagnet 307 earlier. The electromagnetic repulsion force acts for a long time, which is beneficial for improving the wheel braking effect.

[0053] In this embodiment, as Figures 3 - 8As shown, a fixing hole 310 is provided on the fixing ring 304. A bolt passes through the fixing hole 310 to fixedly connect the fixing ring 304, the large vehicle body 2, and the first speed reducer 4 into one body. The fixing ring 304 is coaxial with the rotating ring 301, and the inner diameter of the fixing ring 304 is larger than the outer diameter of the rotating ring 301. With this design, one pole of the electromagnet 307 can extend out of the fixing ring 304, so that the electromagnet 307 is closer to the permanent magnet 302, and the generated electromagnetic repulsive force can act more effectively on the braking of the rotating ring 301, improving the electromagnetic braking efficiency. In addition, one pole of the electromagnet 307 extending out of the fixing ring 304 is conducive to the permanent magnet 302 generating an electromagnetic repulsive force with the energized electromagnet 307 earlier. The electromagnetic repulsive force acts for a long time, which is beneficial to improving the wheel braking effect. As Figure 3 shown, when the permanent magnet 302 is not close to the electromagnet 307, the spring 306 is not compressed. At this time, one pole of the electromagnet 307 is located inside the fixing ring 304, and the other pole of the electromagnet 307 extends out from the inner circumferential surface of the fixing ring 304 and is close to the outer circumferential surface of the rotating ring 301.

[0054] In this embodiment, as Figures 3 - 8 shown, an installation hole is provided on the inner circumferential surface of the fixing ring 304. The spring 306 is located at the bottom of the installation hole. The electromagnet 307 is slidably inserted into the installation hole and is connected to the spring 306. The electromagnet 307 will not slide out of the installation hole and fall under the pulling of the spring 306. The electromagnet 307 slides in the installation hole close to or away from the outer wall of the fixing ring 304. With this design, Figure 3 when the rotating ring 301 drives the permanent magnet 302 to rotate and approach the electromagnet 307 as described in Figure 4 shown, the energized electromagnet 307 repels the permanent magnet 302 with the same pole. Under the action of the electromagnetic repulsive force, the electromagnet 307 slides away from the permanent magnet 302 in the direction shown by the arrow and compresses the spring 306, avoiding the collision and interference between the electromagnet 307 and the permanent magnet 302 and affecting the rotation of the rotating ring 301. When the sliding displacement of the electromagnet 307 is the largest, as Figure 5 shown, at this time, the compression of the spring 306 is the largest. Subsequently, as the rotating ring 301 continues to rotate, the permanent magnet 302 gradually moves away from the electromagnet 307. As Figure 3At the shown position, waiting for the arrival of the next permanent magnet 302, the processor analyzes and calculates the maximum electromagnetic braking force at this speed without causing inertial swing of the large component based on the obtained wheel speed and the weight data of the large component, and then adjusts the current flowing through the electromagnet 307 to make the electromagnet 307 generate the electromagnetic force calculated by the processor, and then generates the maximum electromagnetic braking force at this speed without causing inertial swing of the large component with the permanent magnet 302. The electromagnetic repulsive force between the electromagnet 307 and the permanent magnet 302 is the electromagnetic braking force, and this electromagnetic repulsive force is dynamically adjusted, comprehensively analyzed and calculated according to the rotation position of the permanent magnet 302, the wheel speed, and the weight of the large component, so as to continuously maintain the maximum dynamic electromagnetic braking force without causing inertial swing of the large component during the braking process, minimize the braking time and distance. The short braking time and distance can meet the braking requirements for the transfer of large components.

[0055] In this embodiment, at the initial braking stage, the speed of wheel one 5 is high, and at this time, the maximum electromagnetic braking force will not be too large, otherwise it will cause inertial swing of the large component. As the braking continues, the speed of the wheel continuously decreases, and the maximum electromagnetic braking force that does not cause inertial swing of the large component can continuously increase, minimizing the braking time and distance. The short braking time and distance can meet the braking requirements for the transfer of large components. Most traditional drum brakes cannot dynamically and accurately adjust the braking force, and the dynamic adjustment response speed of the braking force of drum brakes is slow, the adjustment accuracy is low, the adjustment structure is complex, and the reliability is not high.

[0056] Similarly, the rotating ring 301 of the brake device two 8 is coaxially and fixedly connected to the axle drivingly connected to wheel two 10, that is, the input shaft of the reduction gearbox two 9; the fixed ring 304 of the brake device two 8 is fixedly connected to the small vehicle body 7.

[0057] It can be seen that an overhead crane for transporting large components in this embodiment uses electromagnetic braking instead of traditional drum brakes, does not use mechanical friction to reduce the wheel speed, so the noise is small, and there is no problem of fast wear. The maintenance is simple, convenient, has a long cycle, and low cost.

[0058] Preferably, as Figures 3 - 8 shown, there are multiple electromagnets 307, and they are centrosymmetrically distributed on the fixed ring 304 with the central axis of the fixed ring 304 as the center. Such a design can increase the electromagnetic braking force, meet the hoisting and braking requirements of various large components, and at the same time reduce the braking burden of a single electromagnet 307 and avoid the electromagnet 307 from failing.

[0059] Furthermore, as Figure 9As shown, a coil cylinder 311 is fixedly inserted into the mounting hole. The coil cylinder 311 is made of a rigid material and does not shield the magnetic field. Such a design not only facilitates the embedding and arrangement of the inductor coil 312 in the coil cylinder 311, but also facilitates the sliding insertion and installation of the electromagnet 307 into the coil cylinder 311 without affecting the sliding of the electromagnet 307. The sliding of the electromagnet 307 will generate an induced current in the inductor coil 312, thereby realizing the recovery of braking kinetic energy into electric energy, saving energy and protecting the environment.

[0060] Further, the outer walls of the rotating ring 301 and the fixed ring 304 are both subjected to magnetic shielding treatment to reduce magnetic field leakage and prevent the magnetic fields leaked by the electromagnet 307 and the permanent magnet 302 from affecting the operation of other components in their vicinity.

[0061] Furthermore, the rotating ring 301, the fixed ring 304, and the components around the electromagnet 307 and the permanent magnet 302 are not made of materials that are easily attracted by magnetic force, so as not to affect the braking effect of the braking device and the normal operation of other components.

[0062] Further, as Figure 9 shown, a pressure power generation plate 313 is installed at the bottom of the mounting hole. The two ends of the spring 306 are respectively connected to the pressure power generation plate 313 and the electromagnet 307. When the spring 306 is compressed, it will squeeze the pressure power generation plate 313 to generate electricity, further recovering the braking kinetic energy into electric energy, saving energy and protecting the environment.

[0063] Preferably, as Figure 8 shown, there are a pair of fixed rings 304, which are fastened and fixedly connected. As Figure 3 shown, an installation groove 305 is provided on one side surface of each fixed ring 304. After the two fixed rings 304 are fastened and fixedly connected, the two installation grooves 305 form the mounting hole. Such a design facilitates the disassembly and assembly of the electromagnet 307 and the coil cylinder 311.

[0064] In this embodiment, as Figure 8 shown, a wire passing hole 309 is provided on the fixed ring 304, and the wire 308 connecting the electromagnet 307, the inductor coil 312, and the pressure power generation plate 313 can extend out from the wire passing hole 309.

[0065] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A hoisting device for transporting large parts, comprising a horizontally fixed track, a large vehicle body, and a small vehicle body. A first wheel is provided on the large vehicle body, and the first wheel is in rolling connection with the horizontally fixed track. A second wheel is provided on the small vehicle body, and the second wheel is in rolling connection with the large vehicle body. It is characterized in that, A braking device I is provided on the large vehicle body, and the braking device I is used to brake the wheel I. A braking device II is provided on the small vehicle body, and the braking device II is used to brake the wheel II; The braking device I and the braking device II have the same structure; The braking device I includes: A rotating ring, which is coaxially and fixedly connected to the axle drivingly connected to the wheel I. A plurality of permanent magnets are evenly distributed on the outer circumferential surface of the rotating ring; one pole of the permanent magnet is located inside the rotating ring, and the other pole of the permanent magnet is located outside the rotating ring, and the other pole of the permanent magnet does not contact the inner wall of the fixed ring; A fixed ring, which is fixedly connected to the large vehicle body and is coaxial with the rotating ring, and the inner diameter of the fixed ring is larger than the outer diameter of the rotating ring. An installation hole is provided on the inner circumferential surface of the fixed ring. There are a pair of fixed rings, which are buckled and fixedly connected. An installation groove is provided on one side surface of each fixed ring. After the two fixed rings are buckled and fixedly connected, the two installation grooves form the installation hole; A spring is located at the bottom of the installation hole. A coil cylinder is fixedly inserted in the installation hole. An inductance coil is embedded in the coil cylinder. An electromagnet is slidably inserted in the coil cylinder and is connected to the spring; A pressure generating plate is installed at the bottom of the installation hole, and the two ends of the spring are respectively connected to the pressure generating plate and the electromagnet; The electromagnet slides close to or away from the outer wall of the fixed ring; When the permanent magnet does not approach the electromagnet, the spring is not compressed. At this time, one pole of the electromagnet is located inside the fixed ring, and the other pole of the electromagnet extends out from the inner circumferential surface of the fixed ring and approaches the outer circumferential surface of the rotating ring; When the rotating ring drives the permanent magnet to rotate close to the electromagnet, the energized electromagnet repels the permanent magnet with the same pole. Under the action of the electromagnetic repulsion force, the electromagnet slides away from the permanent magnet and compresses the spring. After the permanent magnet rotates away from the electromagnet, the compressed spring pushes the electromagnet to slide back to its original position; The outer walls of the rotating ring and the fixed ring are both subjected to magnetic shielding treatment; The rotating ring of the braking device II is coaxially and fixedly connected to the axle drivingly connected to the wheel II; The fixed ring of the braking device II is fixedly connected to the small vehicle body.

2. The hoisting device for transporting large parts as described in claim 1, characterized in that, There are a plurality of electromagnets, and they are centrosymmetrically distributed on the fixed ring with the central axis of the fixed ring as the center.

3. A hoisting device for transporting large parts as described in claim 1, characterized in that, It further includes an electric hoist, a hook, a tension sensor, and a rotational speed sensor. The electric hoist is installed on the small vehicle body. The electric hoist is connected to a fixed pulley through a lifting rope. The fixed pulley is connected to the hook through the tension sensor. The weight of the object suspended by the hook is detected through the tension sensor. The rotational speed sensor is used to detect the rotational speeds of the wheel I and the wheel II.

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