Elevator car balance locking system

Abstract

The utility model discloses an elevator car balance locking system which comprises a car, a traction machine and a traction wheel, and the traction machine drags the car to move along a guide rail through a steel wire rope wound on the traction wheel and a plurality of guide wheels. The elevator is characterized in that the guide wheels comprise driven guide wheels and a driving guide wheel capable of actively rotating, the driven guide wheels are arranged on the front side and the rear side of the elevator car respectively, and the driving guide wheel is installed on the top of the elevator shaft; according to the elevator car balance adjusting device, the balance of the elevator car is adjusted through the driving guide wheel, the structure is simple, implementation is easy, cost is reduced, and the service life of an elevator is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, and in particular to an elevator car balance locking system. Background Technology

[0002] Currently, for some large-tonnage freight elevators, due to the depth of the car, the weight of the goods entering the car from the car door can cause uneven loading, easily leading to track deformation and affecting operation. Therefore, it is necessary to design three or more sets of guide rails to reduce deformation, which increases costs. If the elevator is unbalanced at the front and back during operation, it will affect the elevator's operation, generate noise, and accelerate the wear and lifespan of the guide shoe linings. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an elevator car balancing and locking system, which solves the problem of car eccentricity or imbalance in the prior art, so as to reduce costs and extend service life.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An elevator car balancing and locking system includes a car, a traction machine, and a traction sheave. The traction machine pulls the car along a guide rail via steel wire ropes wound around the traction sheave and multiple guide wheels. The system is characterized in that the guide wheels include passive guide wheels and active guide wheels capable of active rotation. The passive guide wheels are located at the front and rear of the car, respectively, while the active guide wheels are installed at the top of the elevator shaft. The car also has locking guide shoes that cooperate with the guide rails, and these locking guide shoes can lock or release with the guide rails when activated.

[0006] As an optimization, the active guide wheel includes a guide wheel shaft fixed to the top of the elevator shaft, a guide wheel hub rotatably mounted on the guide wheel shaft, and a steel wire rope wound around the guide wheel hub. An annular groove is provided on one end face of the guide wheel hub, and multiple magnets are circumferentially attached to the outer wall of the annular groove. A stator is installed in the annular groove with clearance fit. The stator is keyed to the guide wheel shaft, and multiple iron cores are circumferentially spaced on the stator. Coils are wound on the iron cores. When the coils are energized, they can generate a magnetic field that cooperates with the magnets, driving the guide wheel hub to rotate around the guide wheel shaft.

[0007] As an optimization, a dust cover is also provided on the annular groove to seal it.

[0008] As an optimization, the locking guide shoe includes a base for connecting to the car, a seat body is mounted on the base, and two sets of guide shoe assemblies are provided on the seat body. The guide shoe assembly includes a first fixed wedge and a second fixed wedge arranged vertically opposite each other. The first fixed wedges of the two sets of guide shoe assemblies are arranged adjacent to each other, and there is a gap between the two first fixed wedges for the guide rail to pass through. The two ends of the first fixed wedges are slidably connected to the seat body, so that the first fixed wedges of the two sets of guide shoe assemblies can move closer or further away from each other in the horizontal direction. When the two first fixed wedges move closer to each other, the two first fixed wedges can fit against the guide rail, and when the two first fixed wedges move further away from each other, there is a gap between the two first fixed wedges and the guide rail.

[0009] The opposing surfaces of the first and second fixed wedges are inclined, forming a V-shaped gap between the first and second wedges. A sliding wedge is slidably installed within the V-shaped gap. The sliding wedge is driven to slide by a drive mechanism, enabling it to move up and down. When the sliding wedge slides up and down within the V-shaped gap, it can drive the two first fixed wedges to move towards or away from each other.

[0010] As an optimization, the base includes two vertically opposite side plates, and an upper fixed plate and a lower fixed plate horizontally opposite 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.

[0011] As an optimization, the driving mechanism includes a guide shoe electromagnet, which has an electromagnetic push rod extending outward at both ends. The lower end of the electromagnetic push rod passes through the upper fixed plate and is connected to the sliding wedge. The upper end is provided with a reset nut, and a first reset spring is provided between the reset nut and the guide shoe electromagnet. When the electromagnet is energized, it can drive the electromagnetic push rod to move downward. 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.

[0012] As an optimization, a reset adjustment bolt is provided on the lower fixed plate, and a second reset spring is provided between the reset adjustment bolt and the lower end of the sliding wedge. Adjusting the reset adjustment bolt can adjust the pre-compression amount of the second reset spring.

[0013] As an optimization, the second fixed wedge is slidably connected to the base, and a wedge adjusting bolt is provided on the side plate of the base. Adjusting the wedge adjusting bolt can drive the second wedge to move horizontally.

[0014] Based on the above system, this utility model also provides an elevator car balance locking control method, including the aforementioned elevator car balance locking system, comprising the following steps:

[0015] 1) The car's level status is detected by a level sensor on the car, and the level status signal of the car is sent to the balance control system;

[0016] 2) The balance control system controls the rotation of the drive guide wheel according to the elevator operation status signal sent by the elevator control system. When the car is level, the traction sheave is locked. The balance control system controls the rotation of the drive guide wheel according to the level status signal, pulls the wire rope, and adjusts the car to a level state. Then, it brakes the drive guide wheel and controls the locking guide shoe to lock the guide rail. When the car is in operation, the balance control system controls the drive guide wheel to accelerate or decelerate according to the level status signal, reducing or increasing the resistance of the wire rope, and adjusting the car to a level state.

[0017] Compared with the prior art, this application has the following advantages:

[0018] This invention utilizes an active guide wheel and a passive guide wheel. When the active guide wheel rotates actively, it pulls the steel wire rope on the corresponding side of the car, or increases or decreases the resistance of the steel wire rope to pull it, thereby achieving car balance adjustment. Simultaneously, depending on different operating states of the car, the locking guide shoe and guide rail can be locked or released to maintain the car's level. This invention adjusts car balance through active adjustment, has a simple structure, is easy to implement, thereby reducing costs and extending the elevator's service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram illustrating the principle of this utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0021] Figure 3 This is a top view of the structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the active guide wheel in this utility model;

[0023] Figure 5 This is a schematic diagram of the main structure of the locking guide shoe in this utility model;

[0024] Figure 6 This is a top view of the locking guide shoe in this utility model.

[0025] In the diagram, 1 is the car, 2 is the traction sheave, 3 is the 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, 73 is the first fixed wedge, 74 is the second fixed wedge, 75 is the sliding wedge, 76 is the guide shoe electromagnet, 77 is the first return spring, 78 is the second return spring, and 79 is the wedge adjusting bolt. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] For specific implementation: see [link / reference] Figures 1-6 ,

[0028] An elevator car balancing and locking system includes a car 1, a traction machine, and a traction sheave 2. The traction machine pulls the car 1 along a guide rail 4 via steel wire ropes 3 wound around the traction sheave 2 and multiple guide wheels. The system is characterized in that the guide wheels include passive guide wheels 5 and active guide wheels 6 capable of active rotation. The passive guide wheels 5 are located on the front and rear sides of the car 1, and the active guide wheels 6 are installed on the top of the elevator shaft. A locking guide shoe 7 is also provided on the car 1 to cooperate with the guide rail 4. The locking guide shoe 7 can lock or release with the guide rail 4 when it is activated.

[0029] This invention features an active guide wheel 6 and a passive guide wheel 5. When the active guide wheel 6 rotates actively, it pulls the steel wire rope 3 on the corresponding side of the car 1, or increases or decreases the resistance of the steel wire rope 3 to pull the steel wire rope 3 on the corresponding side of the car 1, thereby achieving the balance adjustment of the car 1. At the same time, depending on the different operating states of the car 1, the locking guide shoe 7 and the guide rail 4 can be locked or released to maintain the horizontal state of the car 1. This invention adjusts the balance of the car 1 through active adjustment, with a simple structure and easy implementation, thereby reducing costs and extending the service life of the elevator.

[0030] Specifically, this utility model can be used in freight elevators with traction ratios of 4:1, 6:1, 8:1, and so on, with additional... Figure 1Taking the 4:1 ratio as an example, one end of the wire rope 3 is fixed, and the other end passes over the guide wheel of the counterweight, then over the traction sheave 2, then over the guide wheel at the rear of the car 1, then over the active guide wheel 6 (in this embodiment, there is one active guide wheel 6), then over the guide wheel at the front of the car 1, and finally the other end is fixed to the top of the elevator shaft. There can be one or more active guide wheels 6, which increase auxiliary power, maintain the balance of the car 1, and the locking guide shoe 7 and active guide wheel 6 can also provide emergency braking in case of an emergency, improving the safety performance of the elevator. This system can also be installed on existing elevators, i.e., by adding the active guide wheel 6 and the locking guide shoe 7. It can also provide left-right balance adjustment for the car 1, i.e., the bottom anti-cord pulley also uses the active guide wheel 6, driving the active guide wheel 6 to accelerate or decelerate according to the elevator's up-and-down movement and left-right horizontal condition, ensuring the car 1 is level.

[0031] 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 mounted 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 multiple magnets 63 are affixed to the outer wall of the annular groove at intervals, with their magnetic poles aligned to generate a fixed magnetic field. A stator 64 is installed in the annular groove with a clearance fit. The stator 64 is keyed to the guide wheel shaft 61, and an iron core 65 is provided around the stator 64 to concentrate the magnetic field. A coil 66 is wound around the iron core 65 to generate a magnetic field. When the coil 66 is energized, it generates an alternating magnetic field, which, in conjunction with the magnets 63, drives the guide wheel hub 62 to rotate around the guide wheel shaft 61. A dust cover 67 is also provided on the annular groove to seal it, protecting the coil 66 and maintaining a seal. A Hall sensor is also installed on the stator 64 to detect the rotational speed of the active guide wheel 6. The Hall sensor is connected to the balance control system. The active guide wheel 6 utilizes the principle of an electric motor and has a simple structure.

[0032] The locking guide shoe 7 includes a base 71 for connecting to the car 1. A seat 72 is mounted on the base 71. The seat 72 includes two vertically opposite side plates and a horizontally opposite upper and lower fixing plates. Two sets of opposite guide shoe assemblies are provided on the seat 72. Each guide shoe assembly includes a first fixing wedge 73 and a second fixing wedge 74 vertically opposite each other. The first fixing wedges 73 of the two sets of guide shoe assemblies have a gap that cooperates with the guide rail 4. Shoe liners are installed on opposite sides of the two first fixing wedges 73 to increase the friction with the guide rail 4 and improve the locking force. The first fixing wedge 73 is slidably connected to the seat 72, so that the first fixing wedges 73 of the two sets of guide shoe assemblies can move closer or further apart in the horizontal direction. When the two first fixing wedges 73 move closer together, the first fixing wedge 73 can fit against the guide rail 4. When the two first fixing wedges 73 move further apart, there is a gap between the first fixing wedge 73 and the guide rail 4.

[0033] The opposing surfaces of the first fixed wedge 73 and the second fixed wedge 74 are inclined, forming a V-shaped groove between them. A sliding wedge 75, matching the shape of the V-shaped groove, is slidably installed within this groove. The sliding wedge 75 is driven to slide by a drive mechanism. As the sliding wedge 75 slides up and down within the V-shaped groove, it moves the two first fixed wedges 73 closer together or further apart. Specifically, the two sides of the sliding wedge 75 are connected to the fixed wedges via needle rollers and retainers. When the sliding wedge 75 slides up and down, its two sides remain connected to the fixed wedges, thus moving the two first fixed wedges 73 closer together or further apart. The drive mechanism is mounted on an upper fixed plate, and the upper end of the sliding wedge 75 passes through the upper fixed plate and connects to the drive mechanism.

[0034] The driving mechanism includes a guide shoe electromagnet 76, which has electromagnetic push rods extending outwards at both ends. The lower end of the electromagnetic push rod passes through the upper fixed plate and connects to the sliding wedge block 75. The upper end is provided with a reset nut, 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 downwards. When the power is off, the electromagnetic push rod moves upwards under the action of the first reset spring 77, thereby driving the sliding wedge block 75 to move up and down. The reset nut is used to adjust the reset force of the first reset spring 77.

[0035] The lower fixed plate is provided with a reset adjustment bolt, and a second reset spring 78 is provided between the reset adjustment bolt and the lower end of the sliding wedge 75. Adjusting the reset adjustment bolt can adjust the pre-compression amount of the second reset spring 78 to adjust the reset force of the second reset spring 78.

[0036] The second fixed wedge 74 is slidably connected to the base 72, and a wedge adjusting bolt 79 is provided on the side plate of the base 72. Adjusting the wedge adjusting bolt 79 can drive the second wedge to move horizontally, and the corresponding guide shoe electromagnet 76 is slidably connected to the upper fixed plate to adapt to the horizontal adjustment of the guide shoe assembly.

[0037] At work,

[0038] Based on the car's levelness, the drive guide wheel rotates. When the car is level with the floor, the traction sheave locks, the drive guide wheel rotates, pulling the wire rope to adjust the car to a level state. Then, the drive guide wheel is braked, and the locking guide shoe is controlled to lock the guide rail. When the car is in operation, the drive guide wheel accelerates or decelerates to reduce or increase the resistance of the wire rope, adjusting the car to a level state.

[0039] During operation, when the elevator levels, after stopping at the user's designated floor, the car's level is determined. When the front of the car is slightly lower, the drive guide wheel rotates counterclockwise. Since the traction sheave is locked, the front of the car can be lifted upwards, and the corresponding rear of the car moves downwards. Once the car is level, the guide shoes are locked to secure the car to the tracks, preventing it from becoming uneven. When the rear of the car is lower, the drive guide wheel rotates counterclockwise and clockwise, lifting the rear of the car. The guide shoes are then locked to prevent the car from moving up and down. After the guide shoes are locked, the drive guide wheel brakes.

[0040] When the elevator is running, it begins to move up and down. The drive guide wheel releases its brakes, and the locking guide shoes reset and release. During the upward movement, depending on the level of the car, when the front of the car is slightly lower, the drive guide wheel decelerates clockwise, increasing the resistance of the wire rope and lifting the front of the car upward. When the front of the car is slightly higher, the drive guide wheel accelerates clockwise, reducing the resistance of the wire rope and lifting the rear of the car upward. During the downward movement, when the front of the car is slightly lower, the drive guide wheel decelerates counterclockwise, increasing the resistance of the wire rope and lifting the front of the car upward. When the front of the car is slightly higher, the drive guide wheel accelerates counterclockwise, reducing the resistance of the wire rope and lifting the rear of the car upward, thus achieving level adjustment of the car.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations 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 merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. An elevator car balance locking system comprising a car, a hoisting machine and a hoisting sheave, the hoisting machine pulling the car along a guide rail by means of a steel wire rope wound around the hoisting sheave and a plurality of guide sheaves; characterized in that, The guide wheel comprises a passive guide wheel and an active guide wheel capable of being actively rotated, the passive guide wheel is separately arranged on 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 locking guide shoe matched with the guide rail is further arranged on the car, and the locking guide shoe can be locked or released with the guide rail when the locking guide shoe is in action.

2. The elevator car balancing locking system of claim 1, wherein, The active guide wheel comprises a guide wheel shaft fixed on the top of the elevator shaft, a guide wheel hub rotatably sleeved on the guide wheel shaft, and the steel wire rope is wound on the guide wheel hub; an annular groove is arranged on one side end surface of the guide wheel hub, a plurality of spaced magnets are attached to the outer side wall of the annular groove in the circumferential direction, a stator is gap-fitted in the annular groove, the stator is key-connected with the guide wheel shaft, a plurality of iron cores are spaced apart in the circumferential direction of the stator, and a coil is wound on the iron core, the coil can generate a magnetic field matched with the magnet when the coil is electrified, and the guide wheel hub is driven to rotate around the guide wheel shaft.

3. The elevator car balancing locking system of claim 1, wherein, A dust cover is further arranged on the annular groove to close the annular groove.

4. The elevator car balance locking system of claim 1, wherein, The locking guide shoe comprises a base for connecting with the car, a seat body installed on the base, and two groups of oppositely arranged guide shoe assemblies arranged on the seat body, the guide shoe assembly comprises a first fixed wedge and a second fixed wedge arranged vertically opposite to each other, wherein the first fixed wedges of the two groups of guide shoe assemblies are arranged adjacent to each other, and the first fixed wedges have a spacing for the guide rail to pass through; the two ends of the first fixed wedge are slidingly connected with the seat body, so that the first fixed wedges of the two groups of guide shoe assemblies can move close to or away from each other in the horizontal direction, when the two first fixed wedges move close to each other, the first fixed wedges can be attached to the guide rail, and when the two first fixed wedges move away from each other, the first fixed wedges have a gap with the guide rail; The opposite surfaces of the first fixed wedge and the second fixed wedge are inclined surfaces, so that a V-shaped gap is formed between the first wedge and the second wedge, and a sliding wedge is slidingly fitted in the V-shaped gap, the sliding wedge is driven to slide by the driving mechanism, so that the sliding wedge can move up and down, and when the sliding wedge slides up and down in the V-shaped gap, the sliding wedge can drive the two first fixed wedges to move towards each other or away from each other.

5. An elevator car balance locking system as defined in claim 4, wherein, The seat body comprises two vertically opposite side plates, and horizontally opposite upper and lower fixed plates, the driving mechanism is installed on the upper fixed plate, and the upper end of the sliding wedge penetrates through the upper fixed plate and is connected with the driving mechanism.

6. An elevator car balance locking system as defined in claim 5, wherein, The driving mechanism comprises a guide shoe electromagnet, the guide shoe electromagnet is provided with an electromagnetic push rod extending outward from both ends, the lower end of the electromagnetic push rod penetrates through the upper fixed plate and is connected with the sliding wedge, the upper end of the electromagnetic push rod is provided with a reset nut, a first reset spring is arranged between the reset nut and the guide shoe electromagnet, the electromagnetic push rod can be driven to move downward when the electromagnet is electrified, and the electromagnetic push rod can move upward under the action of the first reset spring when the electromagnet is de-energized, thereby driving the sliding wedge to move up and down.

7. The elevator car balance locking system of claim 5, wherein, The lower fixed plate is provided with a reset adjusting bolt, a second reset spring is arranged between the reset adjusting bolt and the lower end of the sliding wedge, and the reset adjusting bolt can be adjusted to adjust the pre-compression amount of the second reset spring.

8. The elevator car balance locking system of claim 5, wherein, The second fixed wedge is in sliding fit connection with the seat body, and a wedge adjusting bolt is arranged on the side plate of the seat body, and adjusting the wedge adjusting bolt can drive the second wedge to move horizontally.

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