Counterweight device for auxiliary balancing of elevator car

Abstract

The present invention discloses a counterweight device for auxiliary balance of an elevator car, which belongs to the technical field of elevator car counterweight. Its structure includes a car, a top beam, a base, a controller, two sets of rigid sliding guide shoes, two distance meters, a leveling mechanism and two parallel guide rails. Two columns are fixed between the top beam and the base, a limit frame is fixed between the two columns, a top frame is fixed on the top of the car, and monitoring cylinders are fixed at four positions on the upper surface of the base. A piston 2 is slidably matched in the monitoring cylinder, and a liquid guide tube is fixedly connected to the inner bottom of the monitoring cylinder, and a piston 1 is slidably matched inside the liquid guide tube. The counterweight device for auxiliary balance of an elevator car of the example of the present invention can realize sensitive monitoring of unbalanced force on the car, so that the controller can respond in time and control the leveling mechanism to compensate for the counterweight. The entire device only needs two distance meters to complete the force balance monitoring of the car, which is simple to operate, has low monitoring cost, high sensitivity, and improves the service life of the elevator.

Description

Technical Field

[0001] The invention relates to the technical field of elevator car counterweights, in particular to a counterweight device for auxiliary balancing of an elevator car. Background Art

[0002] When the cargo in the elevator car is unevenly placed, the elevator car will be unevenly stressed, which will increase the friction between the guide shoes and the guide rails of the car, causing the elevator car and the beam structure to bear uneven stress, increasing the wear of mechanical and electrical components such as the guide shoes, wire ropes, traction machines, traction machine drive modules, and reducers. When the elevator car is subjected to uneven stress for a long time, the various components of the elevator are continuously worn, and the car and the beam structure will deform to varying degrees, which will cause the elevator car to become skewed and lose balance, reducing the service life of the elevator and increasing maintenance costs. In the prior art, in order to avoid imbalance in the elevator car, a counterweight is usually set at the top or bottom of the elevator. By adjusting the position of the counterweight, the unbalanced side of the car is compensated, so that the force inside the elevator car is kept balanced.

[0003] In the process of balancing the elevator car, it is necessary to first determine the stress state of the car. The existing methods for determining the stress of the car usually include the following methods: 1. monitoring the pressure values ​​of the two sets of guide shoes on both sides of the car, 2. monitoring the pressure value of the bottom of the car, 3. or monitoring the tilt state of the bottom of the car;

[0004] As for the first monitoring method: since the existing guide shoes are fixed at the top and bottom of the car, and the guide shoes and the car are rigidly connected, the two sets of guide shoes are respectively matched with two guide rails, and each guide shoe is provided with three guide wheels, when the force inside the car is unbalanced, different force changes will occur on the two sets of guide shoes. This kind of force monitoring requires the installation of sensors on each guide wheel to monitor the force condition of each guide wheel, and then the controller's complex force calculation analysis can accurately determine the imbalance direction of the car, which is difficult to monitor, has high monitoring costs, and has high inspection and maintenance costs;

[0005] As for the second monitoring method: it is also necessary to install multiple pressure sensors at the bottom of the car, but the production cost is high, and due to frequent use, it is very easy to be damaged. In addition, when the cargo is large and needs to be placed at an angle, the top of the cargo needs to be leaning against the inner wall of the car, and the internal force conditions of the car cannot be accurately detected, which has limitations. As for the third monitoring method: China Patent Publication No.: CN114906701B is an elevator self-balancing adjustment device, which uses multiple distance meters to detect the change of the distance between the bottom of the car and the balance plate to judge the balance state of the car. In the public document, the balance plate and the car are movably connected by a telescopic spring, and the balance plate is slidably matched with the guide rail. This causes the balance plate to slide downward away from the car under the reaction force after being squeezed by the inclined side of the car, so that the distance between the car and the balance plate detected by the distance meter is inaccurate, the error is large, and the self-balancing of the elevator cannot be effectively achieved. In addition, the tilt amplitude of the car in the prior art solution is limited by the guide shoe and the deformation of the car. In fact, the tilt amplitude is very small, which leads to a very small range of variation of the distance between the car and the balance plate monitored by the distance meter, and the balance plate is slidably matched with the guide rail, which amplifies the detection error. Therefore, it is difficult for the prior art to effectively monitor the force condition of the car and to effectively balance and regulate the car, and there are technical difficulties in overcoming. Summary of the invention

[0006] In order to solve the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a counterweight device for auxiliary balancing of an elevator car, which can realize sensitive monitoring of the unbalanced force on the car, so that the controller can respond in time and control the leveling mechanism to perform counterweight compensation. The entire device only requires two rangefinders to complete the force balance monitoring of the car. It is simple to operate, low in monitoring cost, can quickly assist the force balance of the car, has high sensitivity, and improves the service life of the elevator.

[0007] The technical solution adopted by the present invention to solve the technical problem is:

[0008] Provided is a counterweight device for auxiliary balancing of an elevator car, comprising a car, two sets of rigid sliding guide shoes, a leveling mechanism, and two parallel guide rails, wherein a transverse counterweight block and a longitudinal counterweight block are slidably matched in the leveling mechanism, and further comprising a top beam and a base, wherein two columns are fixed between the top beam and the base, and a controller is fixedly installed on the lower surface of the top beam, a limited position frame is fixed between the two columns, and the top beam and the base are slidably matched between the two guide rails through the rigid sliding guide shoes;

[0009] A top frame is fixed on the top of the car, the leveling mechanism is fixed on the top of the top frame, and the top frame is located inside the limit frame;

[0010] The four inner sides of the limit frame are all slidably matched with adjustment columns, and one end of the adjustment column is in contact with the side of the top frame;

[0011] A universal joint 1 is fixed at the center of the bottom end of the car, and the universal joint 1 is rotatably connected to the top surface of the base. Monitoring cylinders are fixed at four positions on the upper surface of the base. Piston 2 is slidably fitted in the monitoring cylinder, and a liquid guide tube is fixedly connected to the inner bottom of the monitoring cylinder. Piston 1 is slidably fitted on the inner side of the liquid guide tube, and the connecting cavity between piston 2 and piston 1 is filled with fluid. Support plates are fixed on one side of two adjacent monitoring cylinders, and a rangefinder for measuring the horizontal height of piston 1 is fixedly installed on the top of the support plate. A connecting rod is rotatably connected to the top of piston 2, and the top of the connecting rod is rotatably connected to the bottom of the car.

[0012] Furthermore, the four inner side surfaces of the limit frame, namely the front, rear, left and right sides, are all fixed with adjustment cylinders, the adjustment column is slidably fitted inside the adjustment cylinder, and a spring is fixed between the adjustment column and the inner bottom wall of the adjustment cylinder.

[0013] Furthermore, mounting plates are fixed on both sides of the upper and lower surfaces of the limit frame, a group of bolt columns are provided on one side of the mounting plate, the mounting plate is fixed to the column by the bolt columns, and the end of the adjustment column in contact with the top frame is a spherical structure.

[0014] Furthermore, a fixing seat is fixed at the center of the upper surface of the base, and the universal joint is rotatably connected to the inner side of the fixing seat.

[0015] Furthermore, the four monitoring tubes can be classified into two transverse monitoring tubes and two longitudinal monitoring tubes, the two transverse monitoring tubes are symmetrically distributed at the front and rear positions of the upper surface of the base, and the two longitudinal monitoring tubes are symmetrically distributed at the left and right positions of the upper surface of the base.

[0016] Furthermore, one of the support plates is fixed to one side of a horizontal monitoring tube, and the other support plate is fixed to one side of a vertical monitoring tube. A hanging plate is fixed to the top of the support plate, and the rangefinder is fixedly mounted on the lower surface of the hanging plate.

[0017] Furthermore, the liquid guiding tube is provided with a vertical section, the piston 1 is slidably fitted in the vertical section, and the rangefinder is located directly above the piston 1.

[0018] Furthermore, two universal joints are provided at both ends of the connecting rod, and the two universal joints are rotatably connected to the top of the piston and the bottom of the car respectively.

[0019] Furthermore, the leveling mechanism includes a base plate, a top plate is fixed on the top of the base plate, and driving components are fixed to the upper surface of the base plate and the lower surface of the top plate. The driving component includes a servo motor and two vertical plates, a threaded screw is rotatably connected between the two vertical plates and a group of sliding rods are fixed thereto, a sprocket is fixed to the output end of the servo motor, one end of the threaded screw penetrates the vertical plate and is also fixed with a sprocket, chains are connected to the outer shells of the two sprockets, a slide seat is slidably sleeved on the two sliding rods, the threaded screw penetrates the slide seat and is threadedly connected to the slide seat, and the longitudinal counterweight is fixed to the top surface of the slide seat.

[0020] Furthermore, the two driving components are vertically arranged, and the servo motor on the driving component is electrically connected to the controller, and the rangefinder is electrically connected to the controller, one group of rigid sliding guide shoes is fixed on both sides of the upper surface of the top beam, and the other group of rigid sliding guide shoes is fixed on both sides of the bottom of the base, and the rigid sliding guide shoes are adapted to the guide rails.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The counterweight device for auxiliary balancing of an elevator car in the example of the present invention fixes the car between the top beam and the base through a limit frame, so that when the car is subjected to unbalanced force, it will swing slightly with the universal joint 1 as the fulcrum. The occurrence of this small swing is monitored by the connecting rod driving the piston 2 to rise and fall inside the horizontal monitoring cylinder. The cooperation of the liquid guide tube and the piston 1 plays a role in amplifying the displacement change of the piston 2, so that when the piston 2 produces a small displacement, the rangefinder can sensitively detect the change in the vertical height of the piston 1, thereby realizing sensitive monitoring of the unbalanced force of the car, so that the controller can respond in time and control the leveling mechanism to compensate for the counterweight. The entire device only needs two rangefinders to complete the force balance monitoring of the car, is simple to operate, has low monitoring cost, can quickly assist the force balance of the car, has high sensitivity, and improves the service life of the elevator.

[0023] 2. In the elevator car and the auxiliary balancing counterweight device of the examples of the present invention, the adjusting column on the inner side of the limit frame will squeeze the side of the top frame under the action of the spring elastic force, and the adjusting columns on the four inner sides of the limit frame squeeze the side of the top frame with the same force, so that when the car is unloaded, the car is only subjected to the vertical downward gravity, and the bottom of the car is parallel to the top surface of the base. When the car is loaded and the force is uneven, and the top of the car tilts to one side, the inclined side of the top frame will squeeze the adjusting column. At this time, the spring will contract, and the adjusting column will slide a certain range toward the inside of the adjusting cylinder. The setting of the sliding range of the adjusting column allows the car to swing only a small amplitude, while ensuring the comfort of passengers riding the elevator, the monitoring cylinder can monitor the unbalanced force of the car.

[0024] 3. The counterweight device for auxiliary balancing of the elevator car in the example of the present invention has a coordinated arrangement of the liquid guiding tube, piston 1 and piston 2. When piston 2 moves down or up, the fluid inside the liquid guiding tube will change synchronously. Since the diameter of the liquid guiding tube is small, the moving range of piston 1 in the vertical section of the liquid guiding tube is several times that of piston 2 in the horizontal monitoring tube, thereby amplifying the displacement change of piston 2, so that the unbalanced force of the car can be sensitively monitored.

[0025] 4. In the counterweight device for auxiliary balancing of the elevator car of the example of the present invention, the arrangement of the transverse monitoring cylinder and the longitudinal monitoring cylinder can respectively monitor the transverse force and the longitudinal force of the car. According to the analysis of the force conditions, the two driving components in the leveling mechanism respectively control the two transverse counterweight blocks and the longitudinal counterweight blocks to compensate for the force imbalance in the transverse and longitudinal directions, so as to achieve the purpose of assisting the force balance of the car. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 is a front view of the present invention;

[0028] Figure 2 It is a structural schematic diagram of the car of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the limit frame of the present invention;

[0030] Figure 4 It is a schematic diagram of the internal structure of the regulating cylinder of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the base, the horizontal monitoring tube and the vertical monitoring tube when they are coordinated with each other;

[0032] Figure 6 is a cross-sectional view of the support plate and the transverse monitoring tube of the present invention when they are matched;

[0033] Figure 7 It is a schematic diagram of the structure of the driving assembly and the longitudinal counterweight block of the present invention when they cooperate.

[0034] In the figure, 1. car, 2. guide rail, 3. column, 4. top beam, 5. base, 6. rigid sliding guide shoe, 7. controller, 8. limit frame, 9. top frame, 10. bottom plate, 11. top plate, 12. horizontal counterweight, 13. longitudinal counterweight, 14. drive assembly, 141. vertical plate, 142. threaded screw, 143. slide bar, 144. servo motor, 145. sprocket, 146. chain, 147. slide seat, 15. universal joint 1, 16. mounting plate, 17. bolt column, 18. adjustment cylinder, 19. adjustment column, 20. spring, 21. horizontal monitoring cylinder, 22. longitudinal monitoring cylinder, 23. fixed seat, 24. support plate, 25. suspension plate, 26. rangefinder, 27. liquid guide tube, 28. piston 1, 29. piston 2, 30. connecting rod, 31. universal joint 2. DETAILED DESCRIPTION

[0035] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0036] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings.

[0041] Example: Reference Figure 1-7 The illustrated elevator car auxiliary balancing counterweight device comprises a car 1, two sets of rigid sliding guide shoes 6, a leveling mechanism and two parallel guide rails 2, wherein a transverse counterweight block 12 and a longitudinal counterweight block 13 are slidably matched in the leveling mechanism, and further comprises a top beam 4 and a base 5, wherein two upright posts 3 are fixed between the top beam 4 and the base 5, and a controller 7 is fixedly mounted on the lower surface of the top beam 4, a limited position frame 8 is fixed between the two upright posts 3, and the top beam 4 and the base 5 are slidably matched between the two guide rails 2 through the rigid sliding guide shoes 6;

[0042] One set of rigid sliding guide shoes 6 is fixed on both sides of the upper surface of the top beam 4, and the other set of rigid sliding guide shoes 6 is fixed on both sides of the bottom of the base 5, and the rigid sliding guide shoes 6 are adapted to the guide rails 2;

[0043] A top frame 9 is fixed on the top of the car 1, and a leveling mechanism is fixed on the top of the top frame 9, and the top frame 9 is located inside the limit frame 8;

[0044] The four inner sides of the limit frame 8 are all slidably matched with adjustment columns 19, and one end of the adjustment column 19 abuts against the side of the top frame 9;

[0045] A universal joint 15 is fixed at the center of the bottom end of the car 1, and the universal joint 15 is rotatably connected to the top surface of the base 5. Monitoring tubes are fixed at four positions on the upper surface of the base 5. The four monitoring tubes can be classified into two horizontal monitoring tubes 21 and two longitudinal monitoring tubes 22. A piston 29 is slidably fitted in the monitoring tube, and a liquid guide tube 27 is fixedly connected to the inner bottom of the monitoring tube, and a piston 28 is slidably fitted on the inner side of the liquid guide tube 27. The connecting cavity between the piston 29 and the piston 28 is filled with fluid, and a support plate 24 is fixed on one side of two adjacent monitoring tubes, and a rangefinder 26 for measuring the horizontal height of the piston 28 is fixedly installed on the top of the support plate 24. A connecting rod 30 is rotatably connected to the top of the piston 29, and the top of the connecting rod 30 is rotatably connected to the bottom of the car 1, and the bottom of the support plate 24 is fixed to the top surface of the base 5.

[0046] In the present invention, the bottom of the car 1 is rotatably connected to the base 5 through a universal joint 15, and the adjusting columns 19 on the four inner sides of the limit frame 8 squeeze the sides of the top frame 9 with the same force, so that the car 1 is fixed between the top beam 4 and the base 5. When the car 1 is unloaded, the car 1 is only subjected to the vertical downward gravity, and the bottom of the car 1 is parallel to the top surface of the base 5. When the car 1 is loaded and the force is uneven, the top of the car 1 tilts to one side, and the inclined side of the top frame 9 squeezes the adjusting column 19. At this time, the adjusting column 19 slides within a preset range, which will cause the car 1 to swing slightly with the universal joint 15 as the fulcrum when the force is unbalanced, and the limit frame 8 limits the swing amplitude of the top frame 9. The car 1 is in the swinging process. In the embodiment, the bottom of the car 1 is no longer level with the base 5, and the car 1 drives the piston 29 to rise and fall inside the horizontal monitoring tube 21 through the connecting rod 30. During the downward or upward movement of the piston 29, the fluid inside the liquid guide tube 27 will change synchronously. The composition of the fluid is engine oil. Since the diameter of the liquid guide tube 27 is small, the moving range of the piston 1 28 in the vertical section of the liquid guide tube 27 is multiple times the moving range of the piston 29 in the horizontal monitoring tube 21. When the piston 29 has a small displacement, the distance meter 26 can sensitively detect the change in the vertical height of the piston 1 28, which plays a role in amplifying the displacement change of the piston 29, so that the unbalanced force of the car 1 can be sensitively monitored by the distance meter 26.

[0047] When one of the distance meters 26 detects that the piston 28 on one side of the lateral monitoring tube 21 rises and exceeds the preset height range, it indicates that the force on the side of the car 1 close to the distance meter 26 is unbalanced, and the force on the side of the car 1 close to the distance meter 26 is relatively large. At this time, the controller 7 will control the leveling mechanism to start, and the leveling mechanism controls the lateral counterweight block 12 to move laterally toward the side of the car 1 with less force, until the height of the piston 28 drops to within the preset height range, and the lateral counterweight block 12 stops moving; if the distance meter 26 detects that the height of the piston 28 drops and exceeds the preset height range, it indicates that the force on the side of the car 1 close to the distance meter 26 is relatively small, and the lateral counterweight block 12 moves to the side with less force to compensate for the force; this process can quickly assist in balancing the force on the car 1 in the lateral direction;

[0048] Another distance meter 26 cooperates with the longitudinal monitoring tube 22 to monitor the force balance in the longitudinal direction of the car 1. With the same judgment method and operation steps, the controller 7 controls the start of the leveling mechanism, and the leveling mechanism controls the longitudinal counterweight block 13 to move longitudinally and compensate for the side of the car 1 with less force in the longitudinal direction, thereby assisting in the force balance in the longitudinal direction of the car 1.

[0049] When the elevator is unloaded, the transverse counterweight 12 and the longitudinal counterweight 13 are both located at the top middle position of the car 1 , and the transverse counterweight 12 is located directly above the longitudinal counterweight 13 .

[0050] In order to make the adjusting column 19 press the side of the top frame 9 with the same force, so that the car 1 is fixed between the top beam 4 and the base 5, In this embodiment, the four inner sides of the limit frame 8, namely, the front, back, left and right sides, are all fixed with adjustment cylinders 18, the adjustment column 19 is slidably fitted inside the adjustment cylinder 18, and a spring 20 is fixed between the adjustment column 19 and the inner bottom wall of the adjustment cylinder 18, the upper and lower surfaces of the limit frame 8 are all fixed with mounting plates 16, one side of the mounting plate 16 is provided with a group of bolt columns 17, and the mounting plate 16 is fixed to the column 3 through the bolt columns 17, and the end of the adjustment column 19 in contact with the top frame 9 is a spherical structure, and the setting of the spherical structure facilitates the sliding contact between the top frame 9 and the adjustment column 19, and under the action of the elastic force of the spring 20, the adjustment column 19 will squeeze the side of the top frame 9, when the top of the car 1 tilts to one side, the inclined side of the top frame 9 will squeeze the adjustment column 19, and at this time the spring 20 will contract, and the adjustment column 19 will slide a certain range toward the inside of the adjustment cylinder 18, and the setting of the sliding range of the adjustment column 19 allows the car 1 to only swing slightly, while ensuring the comfort of passengers riding the elevator, the monitoring cylinder can monitor the unbalanced force of the car 1.

[0051] In order to enable the universal joint 15 to be rotatably connected to the base 5 , in this embodiment, a fixing seat 23 is fixed at the center of the upper surface of the base 5 , and the universal joint 15 is rotatably connected to the inner side of the fixing seat 23 .

[0052] In order to enable the two rangefinders 26 to respectively monitor the stress conditions of the car 1 in the transverse and longitudinal directions, in the present embodiment, the two transverse monitoring tubes 21 are symmetrically distributed at the front and rear positions on the upper surface of the base 5, and the two longitudinal monitoring tubes 22 are symmetrically distributed at the left and right positions on the upper surface of the base 5, wherein one support plate 24 is fixed on one side of a transverse monitoring tube 21, and the other support plate 24 is fixed on one side of a longitudinal monitoring tube 22, a hanging plate 25 is fixed on the top of the support plate 24, the rangefinder 26 is fixedly installed on the lower surface of the hanging plate 25, the liquid guide tube 27 is provided with a vertical section, the piston 28 is slidably fitted in the vertical section, the rangefinder 26 is located directly above the piston 28, and the two rangefinders 26 respectively monitor the changes in the horizontal heights of the pistons 28 on the transverse monitoring tube 21 and the longitudinal monitoring tube 22, so as to judge the inclination of the car 1, and further obtain the stress conditions of the car 1 in the transverse and longitudinal directions.

[0053] In order to make the two ends of the connecting rod 30 rotatably connected to the car 1 and the second piston 29 respectively, in this embodiment, both ends of the connecting rod 30 are provided with universal joints 31, and the two universal joints 31 are rotatably connected to the top of the second piston 29 and the bottom of the car 1 respectively.

[0054] In order to enable the leveling mechanism to control the lateral movement of the lateral counterweight 12 and the longitudinal movement of the longitudinal counterweight 13 respectively, in this embodiment, the leveling mechanism includes a base plate 10, a top plate 11 is fixed on the top of the base plate 10, and a driving assembly 14 is fixed to the upper surface of the base plate 10 and the lower surface of the top plate 11. The driving assembly 14 includes a servo motor 144 and two vertical plates 141. A threaded screw 142 is rotatably connected between the two vertical plates 141 and a group of sliding rods 143 are fixed thereto. A sprocket 145 is fixed to the output end of the servo motor 144. One end of the threaded screw 142 passes through the vertical plate 141 and is also fixed with a sprocket 145. Chains 146 are connected to the outer shells of the two sprockets 145. A slide seat 147 is slidably sleeved on the two sliding rods 143. The threaded screw 142 passes through the slide seat 147 and is threadedly connected to the slide seat 147. The longitudinal counterweight 13 is fixed to the upper top surface of the slide seat 147. The two driving components 14 respectively control the sliding seats 147 thereon to slide, and drive the lateral counterweight block 12 and the longitudinal counterweight block 13 to move horizontally and vertically through the sliding seats 147; Figure 7 As shown, the servo motor 144 and the vertical plate 141 are both fixed on the surface of the base plate 10, the servo motor 144 drives the sprocket 145 to rotate, and the two sprockets 145 rotate synchronously with the cooperation of the chain 146, the threaded screw 142 rotates with the chain 146, the threaded screw 142 drives the slide 147 to slide, and then drives the longitudinal counterweight 13 to move, and the setting of the slide rod 143 enables the slide 147 to move stably along a straight line.

[0055] Furthermore, in this embodiment, the two drive assemblies 14 are vertically arranged, and the servo motor 144 on the drive assembly 14 is electrically connected to the controller 7, and the rangefinder 26 is electrically connected to the controller 7. The two rangefinders 26 transmit the monitored data signals to the controller 7 in real time. After the controller 7 analyzes and processes the received signals, it controls the servo motors 144 in the two drive assemblies 14 to start, and then controls the movement of the transverse counterweight block 12 and the longitudinal counterweight block 13 to assist the force balance of the car 1.

[0056] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0057] Except for the technical features described in the specification, the remaining technical features are known technologies to those skilled in the art. In order to highlight the innovative features of the present invention, the remaining technical features will not be described here in detail.

Claims

1. A counterweight device for auxiliary balancing of an elevator car, comprising a car (1), two sets of rigid sliding guide shoes (6), a leveling mechanism and two parallel guide rails (2), wherein a transverse counterweight block (12) and a longitudinal counterweight block (13) are slidably fitted in the leveling mechanism, characterized in that: It also comprises a top beam (4) and a base (5), two columns (3) are fixed between the top beam (4) and the base (5), a controller (7) is fixedly mounted on the lower surface of the top beam (4), a limit position frame (8) is fixed between the two columns (3), and the top beam (4) and the base (5) are slidably matched between the two guide rails (2) via a rigid sliding guide shoe (6); A top frame (9) is fixed on the top of the car (1), the leveling mechanism is fixed on the top of the top frame (9), and the top frame (9) is located inside the limit frame (8); The four inner sides of the limit frame (8) are all slidably matched with adjustment columns (19), and one end of the adjustment column (19) is in contact with the side of the top frame (9); A universal joint (15) is fixed at the center of the bottom end of the car (1), and the universal joint (15) is rotatably connected to the top surface of the base (5). Monitoring tubes are fixed at four positions on the upper surface of the base (5). A piston (29) is slidably fitted in the monitoring tube, and a liquid guide tube (27) is fixedly connected to the inner bottom of the monitoring tube. A piston (28) is slidably fitted inside the liquid guide tube (27). A fluid is filled in the connecting cavity between the piston (29) and the piston (28). A support plate (24) is fixedly installed on one side of two adjacent monitoring tubes. A rangefinder (26) for measuring the horizontal height of the piston (28) is fixedly installed on the top of the support plate (24). A connecting rod (30) is rotatably connected to the top of the piston (29), and the top of the connecting rod (30) is rotatably connected to the bottom of the car (1); The leveling mechanism comprises a bottom plate (10), a top plate (11) is fixed on the top of the bottom plate (10), a driving assembly (14) is fixed on the upper surface of the bottom plate (10) and the lower surface of the top plate (11), the driving assembly (14) comprises a servo motor (144) and two vertical plates (141), a threaded screw rod (142) is rotatably connected between the two vertical plates (141) and a group of sliding rods (143) are fixed thereto, a sprocket wheel (145) is fixed at the output end of the servo motor (144), and the threaded screw rod (142) is fixed thereto. One end passes through the vertical plate (141) and is also fixed with a sprocket (145), the two sprockets (145) are outer-connected with chains (146), the two slide rods (143) are slidably sleeved with a slide seat (147), the threaded screw rod (142) passes through the slide seat (147) and is threadedly connected to the slide seat (147), the longitudinal counterweight block (13) is fixed on the top surface of the slide seat (147), the two drive assemblies (14) are vertically arranged, and the servo motor (144) on the drive assembly (14) is electrically connected to the controller (7).

2. The counterweight device for auxiliary balancing of an elevator car according to claim 1, characterized in that: The four inner side surfaces of the limit frame (8) are all fixed with adjustment cylinders (18); the adjustment column (19) is slidably fitted inside the adjustment cylinder (18); and a spring (20) is fixed between the adjustment column (19) and the inner bottom wall of the adjustment cylinder (18).

3. The counterweight device for auxiliary balancing of an elevator car according to claim 2, characterized in that: Mounting plates (16) are fixed on both sides of the upper and lower surfaces of the limit frame (8), a group of bolt columns (17) are provided on one side of the mounting plate (16), the mounting plate (16) is fixed on the column (3) through the bolt columns (17), and the end of the adjustment column (19) in contact with the top frame (9) is a spherical structure.

4. The counterweight device for auxiliary balancing of an elevator car according to claim 2, characterized in that: A fixing seat (23) is fixed at the exact center of the upper surface of the base (5), and the universal joint (15) is rotatably connected to the inner side of the fixing seat (23).

5. The counterweight device for auxiliary balancing of an elevator car according to claim 1, characterized in that: The four monitoring tubes can be classified into two transverse monitoring tubes (21) and two longitudinal monitoring tubes (22). The two transverse monitoring tubes (21) are symmetrically distributed at front and rear positions on the upper surface of the base (5), and the two longitudinal monitoring tubes (22) are symmetrically distributed at left and right positions on the upper surface of the base (5).

6. The counterweight device for auxiliary balancing of an elevator car according to claim 5, characterized in that: One of the support plates (24) is fixed to one side of a transverse monitoring tube (21), and the other support plate (24) is fixed to one side of a longitudinal monitoring tube (22). A hanging plate (25) is fixed to the top of the support plate (24), and the rangefinder (26) is fixedly mounted on the lower surface of the hanging plate (25).

7. The counterweight device for auxiliary balancing of an elevator car according to claim 6, characterized in that: The liquid guiding tube (27) is provided with a vertical section, the piston one (28) is slidably fitted in the vertical section, and the distance meter (26) is located directly above the piston one (28).

8. The counterweight device for auxiliary balancing of an elevator car according to claim 1, characterized in that: Universal joints (31) are provided at both ends of the connecting rod (30), and the two universal joints (31) are rotatably connected to the top of the second piston (29) and the bottom of the car (1) respectively.

9. The counterweight device for auxiliary balancing of an elevator car according to claim 8, characterized in that: The distance meter (26) is electrically connected to the controller (7), wherein one set of rigid sliding guide shoes (6) is fixed on both sides of the upper surface of the top beam (4), and another set of rigid sliding guide shoes (6) is fixed on both sides of the bottom of the base (5), and the rigid sliding guide shoes (6) are adapted to the guide rails (2).

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