Electromagnetic unbalance self-leveling suspension device

Abstract

The present application relates to a kind of electromagnetic type unbalance self-leveling suspension device, by using electromagnetic balancing device, the non-contact guiding of car is realized, the friction and wear caused by traditional mechanical guiding are significantly reduced, thereby effectively prolong the service life of guide rail and related components, and greatly reduce operating noise, improve the comfort of ride;At the same time, counterweight balancing device can accurately adjust the position of counterweight, effectively deal with static unbalance, ensure the initial balance state of elevator operation;More importantly, when the car unbalance exceeds the adjustment capacity of counterweight balancing device, electromagnetic balancing device can actively and quickly adjust magnetic field parameters, realize the accurate compensation of dynamic unbalance, so that the stable operation of car can be maintained under various load conditions, significantly improve the stability and comfort of elevator operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator equipment, in particular to an electromagnetic off-load self-leveling suspension device. BACKGROUND

[0002] As an indispensable means of transportation in modern cities, the safety and comfort of elevators have always been the focus of attention. Traditional elevator systems mainly rely on mechanical components such as steel wire ropes, pulleys, guide rails, and guide shoes to achieve the lifting and guiding of the car. This mechanical guiding method has inherent limitations. Specifically, due to the direct contact and sliding friction between mechanical components, the components are prone to wear and tear, requiring regular maintenance and replacement, which not only increases maintenance costs and downtime, but also generates noise from mechanical friction, significantly affecting the comfort of passengers. In addition, traditional elevators often have difficulty achieving precise automatic leveling when the distribution of passengers or cargo inside the car is uneven. When off-load occurs inside the car, it can easily cause the car to tilt and run unevenly.

[0003] To solve the above problems, for example, Chinese Patent No. CN206842794U (publication date: January 5, 2018, invention name: Elevator self-balancing car device) discloses a scheme that achieves self-balancing effect by adding a self-balancing frame, a weighing device, and a balancing unit to the bottom of the car. However, in actual application, the balance bracket structure of this scheme is relatively complex, the balancing effect is not fine enough, and the car guiding still relies on mechanical contact guiding, which cannot avoid mechanical wear and tear and noise problems. SUMMARY

[0004] To solve the above problems, the present application provides an electromagnetic off-load self-leveling suspension device that achieves smoother, more comfortable, safer, and lower maintenance cost through non-contact electromagnetic guiding and active magnetic field adjustment, in cooperation with counterweight balancing.

[0005] To achieve the above purpose, the electromagnetic off-load self-leveling suspension device designed by the present application is applied to an elevator car, which includes:

[0006] A guide rail is provided on the side wall of the elevator shaft and is vertically arranged along the running direction of the car.

[0007] An electromagnetic balancing device is provided in the car opposite to the guide rail, which is used to generate a magnetic field acting on the guide rail to non-contact guide the car.

[0008] A counterweight balancing device is provided in the car, which is used to adjust the position of the counterweight according to the first off-load adjustment instruction to balance the car.

[0009] When the unbalanced load of the car exceeds a predetermined balance value of the counterweight balancing device, the electromagnetic balancing device adjusts the magnetic field parameter according to a second unbalanced load adjusting instruction to balance the car.

[0010] Preferably, the counterweight balancing device comprises two oppositely arranged driving units, a guide connected between the two driving units, and a counterweight unit slidingly connected to the guide; the driving unit is used to drive the counterweight unit to move to a target position according to a first unbalanced load adjusting instruction.

[0011] Preferably, the driving unit is an electromagnetic coil.

[0012] Preferably, the guide comprises:

[0013] a sliding rod, and the counterweight unit is provided with a sliding hole matched with the sliding rod;

[0014] or a hollow conduit for accommodating the counterweight unit.

[0015] Preferably, a plurality of counterweight balancing devices are provided, and the plurality of counterweight balancing devices are arranged along the width and length directions of the car and connected to be integrally installed on the top and / or bottom of the car.

[0016] Preferably, a universal buffer support is further arranged between the car and the counterweight balancing device.

[0017] Preferably, the electromagnetic balancing device comprises a plurality of electromagnetic coils; the guide rail is made of permanent magnetic material or internally provided with an electromagnetic coil.

[0018] Preferably, the control device further comprises:

[0019] an unbalanced load detection device arranged on the car and used to detect the unbalanced load state of the car;

[0020] a controller electrically connected with the unbalanced load detection device, the electromagnetic balancing device and the counterweight balancing device, and used to generate a first unbalanced load adjusting instruction and a second unbalanced load adjusting instruction according to the detection result of the unbalanced load detection device;

[0021] When the unbalanced load of the car detected by the unbalanced load detection device exceeds a predetermined balance value of the counterweight balancing device, the controller generates the second unbalanced load adjusting instruction to control the electromagnetic balancing device to adjust the magnetic field strength and / or magnetic field direction of the electromagnetic balancing device to balance the car.

[0022] Preferably, the unbalanced load detection device comprises:

[0023] a pressure-sensitive sensing unit used to detect the load distribution on the car platform;

[0024] A piezoelectric induction unit is used to convert the pressure signal of the piezoelectric sensor unit into an electric signal.

[0025] A horizontal detection unit is used to detect the tilt angle of the car.

[0026] Preferably, the controller generates the first or second unbalanced load adjustment instruction when the tilt angle of the car detected by the horizontal detection unit exceeds 3 degrees.

[0027] The electromagnetic unbalanced load self-leveling suspension device designed in the application realizes non-contact guiding of the car through the electromagnetic balancing device, significantly reduces the friction and wear caused by traditional mechanical guiding, effectively prolongs the service life of the guide rail and related components, greatly reduces the running noise, and improves the riding comfort. At the same time, the counterweight balancing device can accurately adjust the position of the counterweight, effectively cope with static unbalanced load, and ensure the initial balance state of the elevator operation. More importantly, when the car unbalanced load exceeds the adjustment capacity of the counterweight balancing device, the electromagnetic balancing device can actively and quickly adjust the magnetic field parameters to realize accurate compensation of dynamic unbalanced load, so that the car can run smoothly under various load conditions, significantly improving the stability and comfort of the elevator operation. In addition, the non-contact electromagnetic guiding reduces the wear of mechanical parts, reduces the maintenance demand and cost, and improves the reliability and economy of the elevator operation. The counterweight balancing device and the electromagnetic balancing device work together to more efficiently cope with various unbalanced load conditions, improve the balance efficiency and response speed of the entire system, and ultimately improve the overall operation performance of the elevator and the riding experience of passengers. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the electromagnetic unbalanced load self-leveling suspension device provided by the application.

[0029] Figure 2 is a structural schematic diagram of the counterweight balancing device provided by the application.

[0030] Figure 3 is a structural schematic diagram of the counterweight balancing device provided by another embodiment of the application.

[0031] Figure 4 is a leveling schematic diagram of the electromagnetic unbalanced load self-leveling suspension device provided by the application.

[0032] Figure 5 is a leveling schematic diagram of the counterweight balancing device provided by the application.

[0033] Figure 6 is a leveling schematic diagram of the electromagnetic balancing device provided by the application.

[0034] Figure 7is a structural block diagram of the unbalanced load detection device provided by the embodiment of the application.

[0035] The elevator car 100, the guide rail 10, the electromagnetic balancing device 20, the counterweight balancing device 30, the driving unit 31, the guide 32, the sliding rod 321, the hollow conduit 322, the counterweight unit 33, the universal buffer support 40, the unbalanced load detection device 50, the pressure-sensitive sensing unit 51, the weighing piezoelectric sensing unit 52, the horizontal detection unit 53, the controller 60, and the mounting seat 70. DETAILED DESCRIPTION

[0036] The preferred embodiments of the application are described below in conjunction with the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to explain and illustrate the application, and are not used to limit the application.

[0037] The electromagnetic unbalanced load self-leveling suspension device provided by the embodiment is applied to the elevator car 100, and aims to solve the problems of friction and wear caused by the traditional mechanical guide and the unbalanced load in operation, thereby improving the smoothness of elevator operation and the comfort of riding.

[0038] As shown in Figures 1 to 7 , the electromagnetic unbalanced load self-leveling suspension device comprises:

[0039] The guide rail 10 is arranged on the side wall of the elevator shaft and vertically arranged along the running direction of the car 100, thereby providing a solid foundation and a reliable guide track for the stable work of the subsequent electromagnetic balancing device 20.

[0040] The electromagnetic balancing device 20 is arranged in the car 100 and arranged opposite to the guide rail 10, and is used to guide the car 100 in a non-contact manner by generating a magnetic field acting on the guide rail 10. In the embodiment, the electromagnetic balancing device 20 comprises a plurality of electromagnetic coils, which are mounted on the front, rear, left and right side walls of the car 100 and generate a magnetic field after being energized. The magnetic field interacts with the guide rail 10 arranged opposite to it to form a non-contact supporting force between the car 100 and the guide rail 10, thereby achieving the suspension and non-contact guiding of the car 100, and effectively reducing the friction and wear caused by the traditional mechanical guide.

[0041] The counterweight balancing device 30 is arranged in the car 100, and is used to adjust the position of the counterweight to balance the car 100 according to the first unbalanced load adjustment instruction. When the unbalanced load of the car 100 exceeds the predetermined balance value of the counterweight balancing device 30, the electromagnetic balancing device 20 adjusts the magnetic field parameters to balance the car 100 according to the second unbalanced load adjustment instruction.

[0042] When the device works specifically: as Figure 4 , Figure 5 , Figure 6As shown, under the drive of an elevator traction system (not shown), the car 100 normally runs in the elevator shaft, and the electromagnetic balancing device 20 and the guide rail 10 interact through magnetic force to achieve non-contact guiding of the car 100. Meanwhile, the counterweight balancing device 30 actively adjusts the position of the counterweight according to the load condition to make the center of gravity of the car 100 coincide with the suspension center as much as possible, thereby maintaining the preliminary balance state of the car 100. When the degree of unbalanced load of the car 100 is small and does not exceed the balance limit of the counterweight balancing device 30, the counterweight balancing device 30 can adjust the position of the counterweight according to the first unbalanced load adjustment instruction to achieve balance. At this time, the electromagnetic balancing device 20 mainly provides non-contact guiding. When the degree of unbalanced load of the car 100 exceeds the balance limit of the counterweight balancing device 30, for example, passengers concentrate in a corner of the car 100, causing the center of gravity to deviate too much. At this time, the electromagnetic balancing device 20 will actively adjust the magnetic field parameters acting on the guide rail 10 according to the second unbalanced load adjustment instruction, such as the current size and / or direction of the electromagnetic coil in the electromagnetic balancing device 20, thereby generating additional balancing force to offset the remaining unbalanced torque, and cooperating with the counterweight balancing device 30 to ultimately restore the balance state of the car 100 and ensure the smoothness of the elevator operation. The detailed generation process of the first unbalanced load adjustment instruction and the second unbalanced load adjustment instruction will be described in detail in subsequent embodiments.

[0043] In summary, through non-contact guiding and combined with the cooperative leveling of the counterweight balancing device 30 and the electromagnetic balancing device 20, the problems of mechanical wear, loud noise and difficulty in automatic leveling of the traditional elevator are effectively solved, thereby significantly improving the safety and comfort of the elevator operation.

[0044] In some embodiments, as shown, Figure 4 The counterweight balancing device 30 includes two oppositely arranged drive units 31, a guide piece 32 connected between the two drive units 31, and a counterweight unit 33 slidingly connected to the guide piece 32. The drive unit 31 is used to drive the counterweight unit 33 to move to a target position according to the first unbalanced load adjustment instruction.

[0045] In the embodiment, the driving unit 31 is an electromagnetic coil, which, after receiving the first unbalance adjustment instruction, drives the counterweight unit 33 on the guide 32 to slide along the guide 32, so as to accurately adjust the position of the counterweight unit 33. Specifically, when the passengers in the elevator car 100 are unevenly distributed, resulting in unbalance, the unbalance detection device (not shown) can detect the unbalance condition and generate a first unbalance adjustment instruction to control the current size and / or direction of the electromagnetic coils of the two driving units 31, so as to drive the counterweight unit 33 to move along the guide 32, and finally make the counterweight unit 33 move to the target position determined by the controller, thereby effectively offsetting the unbalance torque of the car 100 and restoring the car 100 to a balanced state. In the embodiment, the counterweight unit 33 can adopt a permanent magnet capable of interacting with the magnetic field generated by the electromagnetic coil of the driving unit 31, or adopt a counterweight block embedded with a permanent magnet.

[0046] In another embodiment, the driving unit 31 can also adopt a motor, the guide 32 can adopt a lead screw for driving the movement of the counterweight unit 33, and the counterweight unit 33 can be driven by the motor to move accurately on the lead screw, thereby achieving the balance of the car 100.

[0047] In some embodiments, the guide 32 comprises:

[0048] a sliding rod 321, the counterweight unit 33 is provided with a sliding hole matched with the sliding rod 321;

[0049] or a hollow conduit 322 for accommodating the counterweight unit 33.

[0050] In a specific embodiment, as shown in Figure 3 the guide 32 is a sliding rod 321, which is a smooth cylindrical rod body, and the counterweight unit 33 is a counterweight sliding block, which is provided with a sliding hole matched with the sliding rod 321, so that the counterweight sliding block can slide freely along the sliding rod 321. This structure is simple and reliable, easy to implement, has lower requirements for the shape of the counterweight unit 33, and has a wider range of weight adjustment of the counterweight unit 33, and is therefore more suitable for passenger elevators with larger load requirements. To further improve the sliding performance, the material of the sliding rod 321 can be a high-strength, low-friction alloy material, such as stainless steel or aluminum alloy, and the inner wall of the sliding hole can be coated with a low-friction material to reduce the resistance when the counterweight sliding block slides.

[0051] In another specific embodiment, as shown in Figure 2As shown, the guide 32 is a hollow conduit 322, and the counterweight unit 33 is a plurality of cylindrical counterweight blocks which are freely movable inside the hollow conduit 322. This structure can effectively protect the counterweight unit 33 from external interference, and can significantly reduce the noise generated during the movement of the counterweight unit 33; in addition, the hollow conduit 322 adopts a closed structure, which has good dust and dirt prevention effect, thereby effectively reducing the cost of regular maintenance, and is more suitable for residential elevators with small load requirements. In order to further reduce the moving resistance of the counterweight unit, the hollow conduit 322 can be made of high-strength, low-friction engineering plastics or metal materials.

[0052] In some embodiments, as shown in Figure 1 , Figure 2 As shown, the counterweight balancing device 30 is provided with a plurality of counterweight balancing devices 30, which are arranged along the width and length directions of the car 100 and connected to form a whole mounted on the top and / or bottom of the car 100. In this way, connecting multiple counterweight balancing devices 30 into a whole can be installed and removed as a complete module, thereby avoiding the tediousness and time-consuming of installing multiple independent counterweight balancing devices 30, and only needs to fix the whole assembly on the top and / or bottom of the car 100, which greatly simplifies the installation and maintenance steps, and significantly reduces the installation time and maintenance cost.

[0053] In a specific embodiment, as shown in Figure 2 According to the size and shape of the car 100, the counterweight balancing device 30 can be configured in two specifications, one long and one short. Four long specification counterweight balancing devices 30 are respectively installed on the four side edges of the bottom of the car 100, and four short specification counterweight balancing devices 30 are installed in a cross layout between the four long specification counterweight balancing devices 30, and the counterweight balancing devices 30 are connected into a whole through the mounting seat 70 of the drive unit 31. After receiving the first unbalanced load adjustment instruction, the drive unit 31 controls the counterweight unit 33 in the eight counterweight balancing devices 30 to move to the corresponding target position, thereby achieving the unbalanced load balancing of the car 100, that is, through the cooperative work of multiple counterweight balancing devices 30, the center of gravity of the car 100 can be adjusted more finely, thereby effectively offsetting the unbalanced moment of the car 100, so that the car 100 can recover to the balanced state more quickly.

[0054] In some embodiments, as shown in Figure 6As shown, the universal buffer support 40 is arranged between the car 100 and the counterweight balancing device 30. In the embodiment, the universal buffer support 40 adopts a ball joint structure, the ball head of which is connected with the bottom of the car 100, and the ball socket of which is connected with the mounting seat 70 of the counterweight balancing device 30, so that the ball head can rotate in the ball socket to realize multi-directional buffering and adjustment. In actual installation process, the installer can loosen the adjusting bolt to adjust the angle of the universal buffer support 40, so as to change the initial counterweight position of the counterweight balancing device 30. For example, the initial counterweight positions of the four counterweight balancing devices 30 arranged at the four corners of the bottom of the car 100 can be adjusted to make the car 100 as horizontal as possible in the initial installation, thereby providing a good basis for subsequent unbalanced load self-leveling.

[0055] In a specific embodiment, the counterweight balancing device 30 is installed at the bottom of the car 100 through the universal buffer support 40, and a spring is further arranged on the universal buffer support 40 to serve as a buffer when the car 100 sags.

[0056] In some embodiments, the guide rail 10 is made of permanent magnetic material or internally provided with an electromagnetic coil. Specifically, when the guide rail 10 is made of permanent magnetic material, it can provide a fixed and stable magnetic field without additional power supply; and when the guide rail 10 is internally provided with an electromagnetic coil, the strength and direction of the magnetic field can be flexibly adjusted by controlling the current of the electromagnetic coil. In operation, no matter whether the permanent magnetic material or the electromagnetic coil is adopted, the magnetic poles of the magnetic field generated by the guide rail 10 will repel the magnetic poles of the magnetic field generated by the electromagnetic balancing device 20, so as to jointly form stable suspension and guiding forces to ensure the smooth running of the car 100 on the guide rail 10.

[0057] In a specific embodiment, as shown in Figure 1 , Figure 5 , Figure 6 As shown, the electromagnetic balancing device 20 can adopt an electromagnetic suction disc, and sixteen electromagnetic suction discs are arranged at the upper and lower eight corners of the car 100 to realize uniform support of the car 100; the guide rail 10 is correspondingly arranged with the electromagnetic balancing device 20 and is made of high-carbon steel material, which has good magnetic conductivity and can form stable magnetic force action with the electromagnetic suction disc. As shown in Figure 6 When the car 100 normally runs in the elevator shaft, the electromagnetic balancing devices 20, i.e. the electromagnetic suction discs, located at the opposite sides of the car 100 will generate magnetic forces to attract the corresponding guide rails 10, so as to form non-contact guiding forces between the car 100 and the guide rails 10, and make the car 100 stably suspended between the guide rails 10 opposite to the car 100.

[0058] In some embodiments, as shown in Figure 1 , Figure 7As shown, also includes:

[0059] The off-load detection device 50 is arranged in the car 100 and is used to detect the off-load state of the car 100.

[0060] The controller 60 is electrically connected with the off-load detection device 50, the electromagnetic balancing device 20 and the counterweight balancing device 30, and is used to generate the first off-load adjustment instruction and the second off-load adjustment instruction according to the detection result of the off-load detection device 50.

[0061] When the off-load of the car 100 detected by the off-load detection device 50 exceeds the predetermined balance value of the counterweight balancing device 30, the controller 60 generates the second off-load adjustment instruction to control the electromagnetic balancing device 20 to adjust the magnetic field strength and / or the magnetic field direction of the electromagnetic balancing device 20 to balance the car 100.

[0062] In the embodiment, as shown, Figure 4 The off-load detection device 50 includes;

[0063] The pressure-sensitive sensing unit 51 is used to detect the load distribution on the platform of the car 100.

[0064] The weighing piezoelectric sensing unit 52 is used to convert the pressure signal of the pressure-sensitive sensing unit 51 into an electric signal.

[0065] The horizontal detection unit 53 is used to detect the inclination angle of the car 100.

[0066] In specific implementation, the pressure-sensitive sensing unit 51 can adopt a pressure-sensitive element such as a pressure-sensitive resistor or a pressure-sensitive film, which is uniformly distributed on the bottom of the car 100, so as to accurately perceive the force condition of each position in the car 100, thereby forming the load distribution data; the weighing piezoelectric sensing unit 52 is electrically connected with the pressure-sensitive sensing unit 51, can receive the pressure signal of the pressure-sensitive sensing unit 51, and convert the pressure signal into an electric signal, thereby converting the weight information of the passenger or the cargo into an electric signal, and transmitting the electric signal to the controller 60; the horizontal detection unit 53 is installed at the center of the top or the bottom of the car 100, for example, can adopt a high-precision level meter, so as to be able to detect the inclination angle of the car 100 in real time.

[0067] Specifically, when passengers or goods enter the car 100, the pressure-sensitive sensing unit 51 can detect the force at each position inside the car 100 in real time and convert this force information into load distribution data. The weighing pressure sensing unit 52 can receive the pressure signal from the pressure-sensitive sensing unit 51 in real time, convert the pressure signal into an electrical signal, and transmit the electrical signal to the controller 60 in real time. At the same time, the horizontal detection unit 53 can also detect the tilt angle of the car 100 in real time and transmit the tilt angle data to the controller 60 in real time. Based on the above data, the controller 60 can calculate the off-center load of the car 100. When the calculated off-center load does not exceed the adjustment limit of the counterweight balancing device 30, such as... Figure 5 As shown, the controller 60 will generate a first off-center load adjustment command to control each counterweight unit 33 of the counterweight balancing device 30, causing its overall center of gravity to move diagonally towards the off-center side, thereby adjusting the off-center load. Conversely, when the calculated off-center load exceeds the adjustment limit of the counterweight balancing device 30, the controller 60 will generate a second off-center load adjustment command to actively control the electromagnetic balancing device 20 to adjust the off-center load. Figure 6 As shown, for example, the electromagnetic chuck located on the upper part of the opposite side of the off-center load can increase its magnetic force to increase the attraction force on the corresponding side guide rail 10, thereby correcting the tilt of the car 100. That is, it works in conjunction with the counterweight balancing device 30 to quickly restore the car 100 to a balanced state. In addition, during the operation of the car 100, the level detection unit 53 continuously detects the tilt angle of the car 100 and feeds the information back to the controller 60. The controller 60 dynamically adjusts the position of the counterweight unit 33 and the magnetic force of the electromagnetic chuck according to the feedback information to ensure that the platform of the car 100 always remains level.

[0068] In some embodiments, such as Figure 6 As shown, when the tilt angle of the car 100 detected by the horizontal detection unit 53 exceeds 3 degrees, the controller 60 generates a first off-center load adjustment command or a second off-center load adjustment command.

[0069] In the embodiment, the controller 60 is preset with a tilt angle threshold value, which is set to 3 degrees, that is, after the controller 60 receives the tilt angle a from the horizontal detection unit 53, the tilt angle a is compared with the preset tilt angle threshold value, that is, 3 degrees, if the tilt angle of the car 100 detected by the horizontal detection unit 53 is less than or equal to 3 degrees, it is considered that the car 100 is in a normal running state, for example, passengers walk in the car 100, and no leveling control is required to avoid frequent adjustment caused by slight disturbance, at this time, the controller 60 will not generate the first unbalanced load adjustment instruction and the second unbalanced load adjustment instruction; if the tilt angle of the car 100 detected by the horizontal detection unit 53 is greater than 3 degrees, it is considered that the car 100 has obvious unbalanced load, and leveling control is required, at this time, the controller 60 will select to generate the first unbalanced load adjustment instruction to control the counterweight balancing device 30 to perform coarse adjustment, or generate the second unbalanced load adjustment instruction to cooperate with the counterweight balancing device 30 and the electromagnetic balancing device 20 to perform fine unbalanced load adjustment, so as to restore the car 100 to a horizontal state.

[0070] The electromagnetic unbalanced load self-leveling suspension device provided by the embodiment can realize non-contact guiding of the car by using the electromagnetic balancing device, significantly reduce the friction and wear caused by the traditional mechanical guiding, effectively prolong the service life of the guide rail and related components, greatly reduce the running noise, and improve the riding comfort; at the same time, the counterweight balancing device can accurately adjust the position of the counterweight, effectively cope with static unbalanced load, and ensure the initial balance state of the elevator operation; more importantly, when the car unbalanced load exceeds the adjustment capacity of the counterweight balancing device, the electromagnetic balancing device can actively and quickly adjust the magnetic field parameters to realize accurate compensation of dynamic unbalanced load, so that the car can run stably under various load conditions, and the stability and comfort of the elevator operation are significantly improved. In addition, the non-contact electromagnetic guiding reduces the wear of mechanical parts, reduces the maintenance demand and cost, and improves the reliability and economy of the elevator operation; the counterweight balancing device and the electromagnetic balancing device work together to more efficiently cope with various unbalanced load conditions, improve the balance efficiency and response speed of the whole system, and ultimately improve the overall operation performance of the elevator and the riding experience of passengers.

[0071] In the description of the present application, it should be noted that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0072] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] Finally, it should be pointed out that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic off-center load self-leveling suspension device, applied to an elevator car, characterized in that, include: The guide rail is installed on the side wall of the elevator shaft and is vertically installed along the running direction of the car; An electromagnetic balancing device is installed in the car and positioned opposite the guide rail, for non-contact guidance of the car by generating a magnetic field that interacts with the guide rail. A counterweight balancing device is provided in the car and is used to adjust the position of the counterweight to balance the car according to the first off-center load adjustment command. When the car is overloaded beyond the predetermined balance value of the counterweight balancing device, the electromagnetic balancing device adjusts the magnetic field parameters according to the second off-center load adjustment command to balance the car.

2. The electromagnetic off-center self-leveling suspension device according to claim 1, characterized in that, The counterweight balancing device includes two opposing drive units, with a guide connecting the two drive units and a counterweight unit slidably connected to the guide; the drive unit is used to drive the counterweight unit to move to the target position according to a first off-center load adjustment command.

3. The electromagnetic off-center self-leveling suspension device according to claim 2, characterized in that, The driving unit is an electromagnetic coil.

4. The electromagnetic off-center self-leveling suspension device according to claim 2, characterized in that, The guide component includes: The slide bar, wherein the counterweight unit is provided with a sliding hole adapted to the slide bar; Alternatively, a hollow conduit may be used to house the counterweight unit.

5. The electromagnetic off-center self-leveling suspension device according to any one of claims 1-4, characterized in that, The counterweight balancing device is provided in multiple ways. The multiple counterweight balancing devices are arranged along the width and length of the car and connected as a whole and installed on the top and / or bottom of the car.

6. The electromagnetic off-center self-leveling suspension device according to claim 5, characterized in that, It also includes a universal buffer support, which is disposed between the car and the counterweight balancing device.

7. The electromagnetic off-center self-leveling suspension device according to claim 1, characterized in that, The electromagnetic balancing device includes multiple electromagnetic coils; the guide rail is made of permanent magnet material or has electromagnetic coils inside.

8. The electromagnetic off-center self-leveling suspension device according to claim 1, characterized in that, Also includes: An off-center load detection device is installed in the car to detect the off-center load status of the car. The controller is electrically connected to the off-center load detection device, the electromagnetic balancing device and the counterweight balancing device, and is used to generate a first off-center load adjustment command and a second off-center load adjustment command based on the detection result of the off-center load detection device. When the off-center load detected by the off-center load detection device exceeds the predetermined balance value of the counterweight balancing device, the controller generates a second off-center load adjustment command to control the electromagnetic balancing device to adjust the magnetic field strength and / or magnetic field direction of the electromagnetic balancing device to balance the car.

9. The electromagnetic off-center self-leveling suspension device according to claim 8, characterized in that, The off-center load detection device includes: Pressure-sensitive sensing unit, used to detect load distribution on the car platform; A weighing pressure induction unit is used to convert the pressure signal from the pressure-sensitive sensing unit into an electrical signal. The horizontal detection unit is used to detect the tilt angle of the car.

10. The electromagnetic off-center self-leveling suspension device according to claim 9, characterized in that, When the tilt angle of the car detected by the horizontal detection unit exceeds 3 degrees, the controller generates the first off-center load adjustment command or the second off-center load adjustment command.

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