Elevator car balance locking system and control method

Abstract

The invention discloses an elevator car balance locking system and a control method, the elevator car balance locking system comprises an elevator control system and a car running in an elevator shaft, a traction machine and a traction wheel are arranged at the top of the elevator shaft, and the traction machine pulls the car to move along a guide rail installed in the elevator shaft through a steel wire rope wound on the traction wheel and a plurality of guide wheels; the elevator further comprises a balance control system and a horizon sensor installed on the lift car, the guide wheels comprise driven guide wheels and driving guide wheels capable of actively rotating, the driven guide wheels are arranged on the front side and the rear side of the lift car respectively, and the driving guide wheels are installed on the top of an elevator shaft. Locking guide shoes matched with the guide rails are further arranged on the lift car, the balance of the lift car is adjusted through the driving guide wheels by detecting the balance state of the lift car, the structure is simple, implementation is easy, cost is reduced, and the service life of an elevator is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator equipment, and particularly relates to an elevator car balance locking system and a control method. Background Art

[0002] Currently, for some large-tonnage freight elevators, due to the deep car depth, when goods enter the car from the car door, due to the heavy weight of the goods, the car is unevenly loaded, which easily causes the track to deform and affects the use. Therefore, it is necessary to design three groups of guide rails, or multiple groups of guide rails, to reduce deformation, increasing the cost. If the car is unbalanced before and after during elevator operation, it will affect the elevator operation, generate noise, and accelerate the wear and service life of the guide shoe linings. Summary of the Invention

[0003] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide an elevator car balance locking system and a control method, which solve the problems of uneven loading or imbalance of the car in the prior art, so as to reduce costs and extend the service life.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: An elevator car balance locking system includes an elevator control system, a car, guide rails, a traction machine and a traction wheel. The traction machine drives the car to move along the guide rails through the traction wheel, multiple guide wheels and a steel wire rope wound around the traction wheel and the guide wheels; it further includes a balance control system and a horizontal sensor installed on the car. The horizontal sensor is connected to the balance control system, and the balance control system is connected to the elevator control system; the guide wheels include a passive guide wheel and an active guide wheel that can rotate actively. The passive guide wheels are respectively arranged on the front side and the rear side of the car, and the active guide wheel is installed at the top of the elevator shaft. The balance control system is connected to the active guide wheel and can control the rotation of the active guide wheel; a locking guide shoe that cooperates with the guide rail is further provided on the car. The balance control system is connected to the locking guide shoe and can control the action of the locking guide shoe, so that the locking guide shoe can lock or release from the guide rail.

[0005] As an optimization, the active guide wheel includes a guide wheel shaft fixed at the top of the elevator shaft. A guide wheel hub is rotatably sleeved on the guide wheel shaft, and the steel wire rope is wound around the guide wheel hub; an annular groove is provided on one end face of the guide wheel hub, and a plurality of spaced magnets are circumferentially attached to the outer side wall of the annular groove. A stator is installed in the annular groove with a clearance fit. The stator is key-connected to the guide wheel shaft. A plurality of iron cores are circumferentially spaced on the stator, and coils are wound around the iron cores. When the coils are energized, a magnetic field that can cooperate with the magnets is generated to drive the guide wheel hub to rotate around the guide wheel shaft.

[0006] As an optimization, a dust cover is further provided on the annular groove to close the annular groove.

[0007] As an optimization, the locking guide shoe includes a base for connecting with the car. A seat body is installed on the base. Two sets of guide shoe components are arranged oppositely on the seat body. The guide shoe component includes a first fixed wedge and a second fixed wedge which are vertically arranged oppositely. Among them, the first fixed wedges of the two sets of guide shoe components are arranged adjacent to each other, and there is a spacing for the guide rail to pass through between the two first fixed wedges; both ends of the first fixed wedge are slidably connected with the seat body, so that the first fixed wedges of the two sets of guide shoe components can approach or move away from each other in the horizontal direction. When the two first fixed wedges approach each other, the two first fixed wedges can be attached to the guide rail, and when the two first fixed wedges move away from each other, there is a gap between the two first fixed wedges and the guide rail; The opposite surfaces of the first fixed wedge and the second fixed wedge are inclined planes, so that a V-shaped gap is formed between the first wedge and the second wedge, and a sliding wedge is slidably installed in the V-shaped gap. The sliding wedge is driven by a driving mechanism to slide, so that the sliding wedge can move up and down. When the sliding wedge slides up and down in the V-shaped gap, it can drive the two first fixed wedges to move towards or away from each other.

[0008] As an optimization, the seat body includes two side plates arranged oppositely vertically, and an upper fixing plate and a lower fixing plate arranged oppositely horizontally. The driving mechanism is installed on the upper fixing plate, and the upper end of the sliding wedge penetrates through the upper fixing plate and is connected with the driving mechanism.

[0009] As an optimization, the driving mechanism includes a guide shoe electromagnet. An electromagnetic push rod with two ends extending outwards is arranged in the guide shoe electromagnet. The lower end of the electromagnetic push rod passes through the upper fixing plate and is connected with the sliding wedge. A reset nut is arranged at the upper end, and a first reset spring is arranged between the reset nut and the guide shoe electromagnet. When the electromagnet is energized, it can drive the electromagnetic push rod to move downwards, and when it is powered off, the electromagnetic push rod moves upwards under the action of the first reset spring, thereby driving the sliding wedge to move up and down.

[0010] As an optimization, a reset adjusting bolt is arranged on the lower fixing plate, and a second reset spring is arranged between the reset adjusting bolt and the lower end of the sliding wedge. By adjusting the reset adjusting bolt, the pre-compression amount of the second reset spring can be adjusted.

[0011] As an optimization, the second fixed wedge is slidably connected with the seat body, and a wedge adjusting bolt is arranged on the side plate of the seat body. By adjusting the wedge adjusting bolt, the second wedge can be driven to move horizontally.

[0012] Based on the above system, the present invention also provides an elevator car balance locking control method, including the above elevator car balance locking system, and includes the following steps: 1) Detect the horizontal state of the car through the horizontal sensor on the car, and send the horizontal state signal of the car to the balance control system; 2) The balance control system controls the rotation of the active guide wheel according to the elevator operation state signal sent by the elevator control system. When the car is leveled, the traction wheel is locked. The balance control system controls the rotation of the active guide wheel according to the horizontal state signal, pulls the steel wire rope, adjusts the car to the horizontal state, then brakes the active guide wheel, and controls the locking guide shoe to act to lock the guide rail; when the car is in the running state, the balance control system controls the active guide wheel to accelerate or decelerate according to the horizontal state signal, reduces or increases the resistance of the steel wire rope, and adjusts the car to the horizontal state.

[0013] The present application has the following beneficial effects compared with the prior art: In the present invention, the horizontal state of the car is sensed by the horizontal sensor, and by setting the active guide wheel and the passive guide wheel, the balance control system controls the active guide wheel to rotate according to the running state of the car, thereby pulling the steel wire rope on the corresponding side of the car, or increasing or decreasing the resistance of the steel wire rope to pull the steel wire rope on the corresponding side of the car, so as to realize the balance adjustment of the car. At the same time, according to different running states, the locking guide shoe is controlled to lock or release from the guide rail to maintain the horizontal state of the car. The present invention actively controls and adjusts the balance of the car, has a simple structure and is easy to implement, thereby reducing the cost and prolonging the service life of the elevator. Description of the Drawings

[0014] Figure 1 is the schematic diagram of the principle of the present invention; Figure 2 is the front view structural schematic diagram of the present invention; Figure 3 is the top view structural schematic diagram of the present invention; Figure 4 is the structural schematic diagram of the active guide wheel in the present invention; Figure 5 is the front view structural schematic diagram of the locking guide shoe in the present invention; Figure 6 is the top view structural schematic diagram of the locking guide shoe in the present invention In the figure, 1 is the car, 2 is the traction wheel, 3 is the steel wire rope, 4 is the guide rail, 5 is the passive guide wheel, 6 is the active guide wheel, 61 is the guide wheel shaft, 62 is the guide wheel hub, 63 is the magnet, 64 is the stator, 65 is the iron core, 66 is the coil, 67 is the dust cover, 7 is the locking guide shoe, 71 is the base, 72 is the seat body, 73 is the first fixed wedge block, 74 is the second fixed wedge block, 75 is the sliding wedge block, 76 is the guide shoe electromagnet, 77 is the first return spring, 78 is the second return spring, 79 is the wedge block adjusting bolt. Detailed Embodiment

[0015] The present invention will be further described in detail below with reference to the drawings.

[0016] During specific implementation: Refer to Figures 1 - 6 , An elevator car balance locking system includes an elevator control system, a car 1, guide rails 4, a traction machine, and a traction sheave 2. The traction machine drives the car 1 to move along the guide rails 4 through the traction sheave 2, multiple guide wheels, and a steel wire rope 3 wound around the traction sheave 2 and the guide wheels; it further includes a balance control system and a horizontal sensor installed on the car 1. The horizontal sensor is connected to the balance control system, and the balance control system is connected to the elevator control system; the guide wheels include a passive guide wheel 5 and an active guide wheel 6 that can rotate actively. The passive guide wheels 5 are respectively arranged on the front side and the rear side of the car 1, and the active guide wheel 6 is installed at the top of the elevator shaft. The balance control system is connected to the active guide wheel 6 and can control the rotation of the active guide wheel 6; a locking guide shoe 7 that cooperates with the guide rail 4 is also provided on the car 1. The balance control system is connected to the locking guide shoe 7 and can control the action of the locking guide shoe 7 so that the locking guide shoe 7 can lock or release from the guide rail 4.

[0017] In the present invention, the horizontal state of the car 1 is sensed by the horizontal sensor, and by setting the active guide wheel 6 and the passive guide wheel 5, the balance control system controls the active guide wheel 6 to rotate according to the operating state of the car 1, thereby pulling the steel wire rope 3 on the corresponding side of the car 1, or increasing or decreasing the resistance of the steel wire rope 3 to pull the steel wire rope 3 on the corresponding side of the car 1, so as to realize the balance adjustment of the car 1. At the same time, according to different operating states, the locking guide shoe 7 is controlled to lock or release from the guide rail 4 to maintain the horizontal state of the car 1. The present invention actively controls and adjusts the balance of the car 1, with a simple structure and easy implementation, thereby reducing costs and extending the service life of the elevator.

[0018] Specifically, the present invention can be used for freight elevators with a traction ratio of 4:1, 6:1, 8:1, and so on. Taking the 4:1 shown in Figure 1 as an example, one end of the steel wire rope 3 is fixed, and the other end bypasses the guide wheel of the counterweight, then bypasses the traction sheave 2, then bypasses the guide wheel at the rear side of the car 1 and then bypasses the active guide wheel 6 (in this embodiment, the active guide wheel 6 is one), and then bypasses the guide wheel at the front side of the car 1, and finally the other end is fixed at the top of the elevator shaft. The active guide wheel 6 can be one or more, adding auxiliary power to maintain the balance of the car 1. The locking guide shoe 7 and the active guide wheel 6 can also provide an emergency braking function in case of an elevator emergency, improving the safety performance of the elevator. This system can also be installed on existing elevators, that is, adding a balance control system, a horizontal sensor, an active guide wheel 6, and a locking guide shoe 7. It can also provide left - right balance adjustment for the car 1, that is, the counterweight sheaves at the bottom of the car also use active guide wheels 6. According to the up - down movement and left - right horizontal situation of the elevator, the balance control system drives the active guide wheel 6 to accelerate or decelerate to ensure the horizontal state of the car 1.

[0019] In this embodiment, the active guide wheel 6 includes a guide wheel shaft 61 fixed to the top of the elevator shaft. A guide wheel hub 62 is rotatably sleeved on the guide wheel shaft 61, and the steel wire rope 3 is wound around the guide wheel hub 62. An annular groove is provided on one end face of the guide wheel hub 62, and a plurality of magnets 63 are attached to the outer side wall of the annular groove at intervals. The magnetic poles are arranged to be consistent to generate a fixed magnetic field. A stator 64 is installed in the annular groove with a clearance fit. The stator 64 is key-connected to the guide wheel shaft 61. An iron core 65 is provided around the stator 64 for converging the magnetic field, and a coil 66 is wound around the iron core 65 for generating a magnetic field. When the coil 66 is energized, it can cooperate with the magnet 63 to drive the guide wheel hub 62 to rotate around the guide wheel shaft 61. The active guide wheel 6 utilizes the motor principle and has a simple structure. A dust cover 67 is also provided on the annular groove to close the annular groove for protecting the coil 66 therein and maintaining the seal. A Hall sensor is also provided on the stator 64 for detecting the rotation speed of the active guide wheel 6, and the Hall sensor is connected to the balance control system.

[0020] The locking guide shoe 7 includes a base 71 for connecting with the car 1. A seat body 72 is installed on the base 71. The seat body 72 includes two vertically opposite side plates, and a top fixing plate and a bottom fixing plate horizontally opposite to each other. Two sets of opposite guide shoe assemblies are provided on the seat body 72. The guide shoe assembly includes a first fixed wedge 73 and a second fixed wedge 74 vertically opposite to each other. A spacing for cooperating with the guide rail 4 is provided between the first fixed wedges 73 of the two sets of guide shoe assemblies. Shoe linings are respectively installed on the opposite sides of the two first fixed wedges 73 to increase the friction with the guide rail 4 and improve the locking force. Among them, the first fixed wedge 73 is slidably and cooperatively connected to the seat body 72, so that the first fixed wedges 73 of the two sets of guide shoe assemblies can approach or move away from each other in the horizontal direction. When the two first fixed wedges 73 approach each other, the first fixed wedge 73 can fit with the guide rail 4, and when the two first fixed wedges 73 move away from each other, there is a gap between the first fixed wedge 73 and the guide rail 4. The opposite faces of the first fixed wedge block 73 and the second fixed wedge block 74 are inclined planes, forming a V-shaped gap between the first wedge block and the second wedge block. A sliding wedge block 75 matching the shape of the V-shaped gap is slidably fitted in the V-shaped gap. The sliding wedge block 75 is driven to slide by a driving mechanism. When the sliding wedge block 75 slides up and down in the V-shaped gap, it can drive the two first fixed wedge blocks 73 to approach or move away from each other. Specifically, both sides of the sliding wedge block 75 are connected to the fixed wedge block through needle rollers and a cage. When the sliding wedge block 75 slides up and down, both sides of the sliding wedge block 75 are always connected to the fixed wedge block, so that when the sliding wedge block 75 slides up and down, it can drive the two first fixed wedge blocks 73 to move in the direction of approaching or moving away from each other. The driving mechanism is installed on the upper fixing plate, and the upper end of the sliding wedge block 75 penetrates through the upper fixing plate and is connected to the driving mechanism.

[0021] The driving mechanism includes a guide shoe electromagnet 76. An electromagnetic push rod extending at both ends is provided in the guide shoe electromagnet 76. The lower end of the electromagnetic push rod passes through the upper fixing plate and is connected to the sliding wedge block 75. A reset nut is provided at the upper end, and a first reset spring 77 is provided between the reset nut and the guide shoe electromagnet 76. When the electromagnet 63 is energized, it can drive the electromagnetic push rod to move downward. When powered off, the electromagnetic push rod moves upward under the action of the first reset spring 77, thereby driving the sliding wedge block 75 to move up and down. Among them, the reset nut is used to adjust the reset force of the first reset spring 77.

[0022] A reset adjustment bolt is provided on the lower fixing plate. A second reset spring 78 is provided between the reset adjustment bolt and the lower end of the sliding wedge block 75. By adjusting the reset adjustment bolt, the pre-compression amount of the second reset spring 78 can be adjusted to adjust the reset force of the second reset spring 78.

[0023] The second fixed wedge block 74 is slidably connected to the seat body 72. A wedge block adjustment bolt 79 is provided on the side plate of the seat body 72. By adjusting the wedge block adjustment bolt 79, the second wedge block can be driven to move horizontally, and the corresponding guide shoe electromagnet 76 is slidably connected to the upper fixing plate to adapt to the horizontal adjustment of the guide shoe assembly.

[0024] Based on the above system, the present invention also provides an elevator car balance locking control method, including the above-mentioned elevator car balance locking system, and includes the following steps: 1) Detect the horizontal state of the car through a horizontal sensor on the car and send the horizontal state signal of the car to the balance control system; 2) The balance control system controls the rotation of the active guide pulley according to the elevator operation status signal sent by the elevator control system. When the car is leveled, the traction sheave is locked. The balance control system controls the rotation of the active guide pulley according to the horizontal status signal, pulls the steel wire rope, adjusts the car to the horizontal state, and then brakes the active guide pulley and controls the locking guide shoe to act to lock the guide rail. When the car is in the running state, the balance control system controls the active guide pulley to rotate at an accelerated or decelerated speed according to the horizontal status signal, reduces or increases the resistance of the steel wire rope, and adjusts the car to the horizontal state.

[0025] During use, when the elevator is leveled, after the elevator stops at the user-specified floor, according to the horizontal sensor, it senses whether the car is level in the front and back. When the front of the car is lower, the balance control system drives the active guide pulley to rotate counterclockwise. Since the traction sheave is locked, the front of the car can be lifted upward, and the corresponding rear of the car moves downward until the horizontal sensor senses that the car is level. Then the balance control system drives the locking guide shoe to lock, locking the car on the track to prevent it from being unlevel, and at the same time notifies the elevator control system to open the door to allow goods to enter and exit the car. When the rear of the car is lower, the balance control system drives the active guide pulley to rotate clockwise and counterclockwise, lifts the rear of the car, and then the locking guide shoe locks to prevent the car from moving up and down. After the locking guide shoe locks, the balance control system controls the active guide pulley to perform star connection braking.

[0026] When the elevator is running, the elevator starts to move up and down. The elevator control system notifies the balance control system to control the active guide pulley to release the star connection braking and the locking guide shoe to reset and release. According to the horizontal sensor, it senses whether the car is level in the front and back. During the upward movement of the elevator, when the front of the car is lower, the balance control system drives the active guide pulley to perform a clockwise decelerated movement, increasing the resistance of the steel wire rope movement, so that the front side of the car is lifted upward. When the front of the car is higher, the balance control system drives the active guide pulley to perform a clockwise accelerated movement, reducing the resistance of the steel wire rope movement, so that the rear side of the car is lifted upward. During the downward movement of the elevator, when the front of the car is lower, the balance control system drives the active guide pulley to perform a counterclockwise decelerated movement, increasing the resistance of the steel wire rope movement, so that the front side of the car is lifted upward. When the front of the car is higher, the balance control system drives the active guide pulley to perform a counterclockwise accelerated movement, reducing the resistance of the steel wire rope movement, so that the rear side of the car is lifted upward.

[0027] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are only illustrative examples of the present invention, and in no way do the embodiments of the present invention constitute a limitation to the present invention.

Claims

1. An elevator car balance locking system, comprising an elevator control system, a car, a guide rail, a traction machine and a traction wheel, wherein the traction machine pulls the car along the guide rail through a traction wheel, a plurality of guide wheels and a steel wire rope wound around the traction wheel and the guide wheel; characterized in that: It also includes a balance control system and a level sensor installed on the car, the level sensor is connected to the balance control system, and the balance control system is connected to the elevator control system; the guide wheel includes a passive guide wheel and an active guide wheel that can actively rotate, the passive guide wheel is respectively arranged at the front side and the rear side of the car, and the active guide wheel is installed on the top of the elevator shaft, the balance control system is connected to the active guide wheel and can control the rotation of the active guide wheel; a locking guide shoe that cooperates with the guide rail is also provided on the car, the balance control system is connected to the locking guide shoe and can control the action of the locking guide shoe, so that the locking guide shoe can be locked or released with the guide rail.

2. An elevator car balance locking system according to claim 1, characterized in that: The active guide wheel includes a guide wheel shaft fixed to the top of the elevator shaft, a guide wheel hub is rotatably sleeved on the guide wheel shaft, and the steel wire rope is wound around the guide wheel hub; an annular groove is provided on one side end face of the guide wheel hub, and a plurality of magnets arranged at intervals are attached to the outer side wall of the annular groove along the circumferential direction, a stator is installed in the annular groove with a gap fit, the stator is key-connected with the guide wheel shaft, a plurality of iron cores are arranged at intervals along the circumferential direction of the stator, and a coil is wound around the iron core, and when the coil is energized, a magnetic field matching the magnet can be generated to drive the guide wheel hub to rotate around the guide wheel shaft.

3. An elevator car balance locking system according to claim 1, characterized in that: A dust cover is also provided on the annular groove to seal the annular groove.

4. The elevator car balance locking system according to claim 1, characterized in that: The locking guide shoe comprises a base for connecting with the car, a base body is installed on the base, and two sets of guide shoe assemblies arranged opposite to each other are arranged on the base body, wherein the guide shoe assemblies comprise a first fixed wedge and a second fixed wedge arranged opposite to each other vertically, wherein the first fixed wedges of the two sets of guide shoe assemblies are arranged adjacent to each other, and there is a spacing between the two first fixed wedges for the guide rail to pass through; the two ends of the first fixed wedge are slidably connected with the base body, so that the first fixed wedges of the two sets of guide shoe assemblies can approach or move away from each other in the horizontal direction, when the two first fixed wedges approach each other, the two first fixed wedges can fit with the guide rail, and when the two first fixed wedges move away from each other, there is a gap between the two first fixed wedges and the guide rail; The opposing surfaces of the first fixed wedge block and the second fixed wedge block are inclined surfaces, so that a V-shaped gap is formed between the first wedge block and the second wedge block, and a sliding wedge block is slidably installed in the V-shaped gap. The sliding wedge block is driven to slide by a driving mechanism, so that the sliding wedge block can move up and down, and when the sliding wedge block slides up and down in the V-shaped gap, it can drive the two first fixed wedge blocks to move towards or away from each other.

5. An elevator car balance locking system according to claim 4, characterized in that: The seat body includes two side plates arranged vertically opposite to each other, and an upper fixed plate and a lower fixed plate arranged horizontally opposite to each other. The driving mechanism is installed on the upper fixed plate, and the upper end of the sliding wedge passes through the upper fixed plate and is connected to the driving mechanism.

6. An elevator car balance locking system according to claim 5, characterized in that: The driving mechanism includes a guide shoe electromagnet, in which an electromagnetic push rod with two extended ends is provided, the lower end of the electromagnetic push rod passes through an upper fixed plate and is connected to a sliding wedge, a reset nut is provided at the upper end, and a first reset spring is provided between the reset nut and the guide shoe electromagnet. When the electromagnet is energized, the electromagnetic push rod can be driven to move downward, and when the power is off, the electromagnetic push rod moves upward under the action of the first reset spring, thereby driving the sliding wedge to move up and down.

7. The elevator car balance locking system according to claim 5, characterized in that: The lower fixed plate is provided with a reset adjustment bolt, and a second reset spring is provided between the reset adjustment bolt and the lower end of the sliding wedge block. By adjusting the reset adjustment bolt, the pre-compression amount of the second reset spring can be adjusted.

8. The elevator car balance locking system according to claim 5, characterized in that: The second fixed wedge block is connected to the seat body in a sliding cooperation manner, and a wedge block adjusting bolt is provided on the side plate of the seat body. Adjusting the wedge block adjusting bolt can drive the second wedge block to move horizontally.

9. An elevator car balance locking control method, comprising an elevator car balance locking system according to any one of claims 1 to 8, characterized in that: The steps include: 1) The horizontal state of the car is detected by the horizontal sensor on the car, and the horizontal state signal of the car is sent to the balance control system; 2) The balance control system controls the rotation of the active guide wheel according to the elevator operation status signal sent by the elevator control system. When the car is level, the traction wheel is locked, and the balance control system controls the rotation of the active guide wheel according to the horizontal status signal, pulls the wire rope, and adjusts the car to a horizontal state. Then, the active guide wheel is braked, and the locking guide shoe is controlled to lock the guide rail. When the car is in operation, the balance control system controls the active guide wheel to accelerate or decelerate according to the horizontal status signal, reduces or increases the wire rope resistance, and adjusts the car to a horizontal state.

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