A car elevator's level landing anti-slip device

Abstract

The utility model discloses a kind of flat layer anti-slip devices of car elevator belongs to elevator technical field.The device includes elevator car, elevator guide rail, traction drive mechanism and the flat layer anti-slip slide rail fixed to the bottom of car, the slide rail is equipped with slide rail pedestal, slide rail pedestal is equipped with by transmission swing arm driven sliding limit block and guide rail limit lock, when flat layer, sliding limit block and limit positioning pearl are engaged to form first mechanical lock;Meanwhile, electromagnetic drive guide rail limit lock extends lock tongue and is engaged into the tooth groove of elevator guide rail, forms second rigid lock, the utility model directly rigidly locks car in guide rail by this independent double locking structure, solve the problem of existing technology dependence single brake, easy to slip due to steel wire rope deformation.It has very high safety redundancy, can ensure flat layer absolute precision, completely eliminates the risk of tripping.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to a leveling anti-slip device for a car elevator. Background Technology

[0002] As an indispensable vertical transportation tool in modern buildings, the smoothness and safety of elevator operation are of paramount importance. During daily operation, the elevator car needs to stop precisely at the designated floor and ensure that the car sill is flush with the floor sill to facilitate safe entry and exit for passengers.

[0003] Currently, maintaining the elevator's level position primarily relies on the brakes in its traction drive mechanism. When the elevator car reaches the target floor, the control system cuts off the traction machine's power and commands the brakes to lock, indirectly fixing the car's position by braking the traction sheave. However, this conventional braking method has inherent technical flaws. Because the elevator car is suspended by elastic steel cables, changes in the internal load caused by passengers entering and exiting the car result in slight stretching or contraction of the cables. This elastic deformation causes the car to experience slight vertical displacement, a phenomenon known as "slippage," even when the traction machine brake is locked. This slippage creates an unsafe height difference between the car sill and the floor sill, easily leading to tripping accidents. Furthermore, relying entirely on the traction machine brake for leveling safety means that its reliability becomes the sole guarantee. If the brake's braking force decreases or fails due to long-term wear or malfunction, it directly poses a serious safety hazard.

[0004] Therefore, this utility model proposes a leveling and anti-slip device for a car elevator to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a leveling and anti-slipping device for a car elevator. It aims to improve the existing technology, in which the car elevator mainly relies on a single traction mechanism brake to maintain the leveling position, which has the risk of insufficient safety redundancy and single-point failure. In addition, it cannot eliminate the problem of slight slippage of the car caused by factors such as elastic deformation of the wire rope, which can easily cause unsafe leveling height differences.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a leveling and anti-slipping device for a car elevator, comprising: an elevator car, an elevator guide rail, a traction drive mechanism, and a leveling and anti-slipping slide rail fixed to the bottom of the elevator car.

[0007] The flat anti-slip slide rail is provided with a slide rail base, which integrates a sliding limit block, a transmission swing arm, a limit positioning bead, and a guide rail limit lock.

[0008] The transmission swing arm is used to drive the sliding limit block to slide along the slide rail base. When the sliding limit block slides to the locking position, the preset groove on it engages with the limiting positioning bead to form the first mechanical lock. Under the drive of the control signal, the locking tongue inside the guide rail limit lock will extend and engage with the preset tooth groove on the elevator guide rail to form the second lock that is rigidly connected to the elevator guide rail.

[0009] Preferably, the transmission swing arm rotates around its axis via a transmission bearing to achieve low-friction, rapid driving of the sliding limit block.

[0010] Preferably, the guide rail limit lock is an electromagnetic drive structure, which can quickly respond and drive the locking tongue to extend when it receives a leveling locking electrical signal from the traction drive mechanism.

[0011] Preferably, the limiting positioning bead is a spring-loaded steel ball, which is embedded in the hole of the slide rail base. When the sliding limiting block slides to the locking position, it can automatically pop out and lock into the groove of the sliding limiting block to achieve reliable self-locking positioning.

[0012] Preferably, the leveling anti-slip slide rail further includes a positioning protrusion, which is a spring preloaded structure used to pre-position itself in cooperation with the slot at the bottom of the elevator car before the main locking mechanism is activated, providing a basis for subsequent precise locking.

[0013] Preferably, the traction drive mechanism specifically includes: A traction machine mounting base fixed to the top of the shaft; a traction drive mounted on the traction machine mounting base for driving the elevator car via a wire rope; The driver chip is used to control the operation of the entire system and send locking signals; and the anti-displacement wheel is used to monitor the displacement status of the wire rope in real time.

[0014] Preferably, it also includes an elevator shaft frame, and the elevator guide rail is fixed on the elevator shaft frame to provide a support reference for the stable operation of the elevator.

[0015] Preferably, the elevator car entrance and exit bottom is provided with a car sill, and a bottom fixing plate is provided under the car sill. The bottom fixing plate abuts against the upper surface of the leveling anti-slip slide rail, which is used to help distribute the force and further stabilize the car position in the locked state.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by adding a set of dual mechanical locking mechanisms consisting of a sliding limit block and a guide rail limit lock at the bottom of the elevator car, the problem of insufficient safety redundancy and single-point failure risk of existing technologies that mainly rely on a single traction mechanism brake to prevent leveling slippage is solved. In the extreme case of traction system brake failure, the car can still be rigidly locked on the elevator guide rail, fundamentally eliminating the accidental slippage of the car and greatly improving the technical effect of elevator operation safety.

[0017] 2. In this utility model, after the car is leveled, the guide rail limit lock directly locks the car to the fixed elevator guide rail, which solves the problem of a slight height difference between the car sill and the floor sill caused by the elastic expansion and contraction of the steel wire rope or the load change caused by passengers entering and exiting. This achieves precise leveling and completely eliminates the risk of tripping caused by the height difference, significantly improving the safety and convenience of passengers, especially the elderly, children and people with mobility impairments, when entering and exiting. Attached Figure Description

[0018] Figure 1 This is a perspective view of a leveling anti-slip device for a car elevator proposed in this utility model; Figure 2 This is a schematic diagram of the traction drive mechanism of a leveling anti-slip device for a car elevator proposed in this utility model; Figure 3 This is a schematic diagram of a leveling anti-slip slide rail for a leveling anti-slip device of a car elevator proposed in this utility model; Figure 4 This is a schematic diagram of the positioning protrusion of a leveling anti-slip device for a car elevator proposed in this utility model; Figure 5 This is a schematic diagram of the elevator guide rail for a leveling and anti-slip device for a car elevator proposed in this utility model.

[0019] Legend: 1. Elevator car; 2. Elevator shaft frame; 3. Car sill; 301. Bottom fixing plate; 4. Traction drive mechanism; 401. Traction machine mounting base; 402. Traction driver; 403. Driver chip; 404. Anti-displacement wheel; 405. Steel wire rope; 5. Leveling anti-slip slide rail; 501. Slide rail base; 502. Positioning protrusion; 503. Transmission swing arm; 504. Transmission bearing; 505. Sliding limit block; 506. Guide rail limit lock; 507. Limit positioning bead; 508. Elevator guide rail. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-5 The present invention provides an embodiment of a leveling anti-slip device for a car elevator, which aims to solve the problem that the existing technology mainly relies on the traction mechanism brake for indirect braking, which has the risk of single-point failure and cannot eliminate the slippage problem caused by the elastic deformation of the wire rope.

[0022] The overall structure of the leveling and anti-slip device of the elevator car is based on the elevator shaft frame 2 as the supporting skeleton. The elevator guide rail 508 is vertically fixed to the inner wall of the elevator shaft frame 2. The elevator car 1 is the core carrying structure. The guide shoe on its side wall is slidably connected to the elevator guide rail 508 to achieve guided lifting. A traction drive mechanism 4 is set on the top of the elevator shaft frame 2 and is connected to the elevator car 1 through multiple steel wire ropes 405. It is used to pull the elevator car 1 to run along the elevator guide rail 508. The leveling and anti-slip slide rail 5, which is the core locking mechanism, is horizontally fixed to the bottom of the elevator car 1. It is used to rigidly lock the elevator car 1 and the elevator guide rail 508 after the elevator car 1 is leveled into place.

[0023] The leveling anti-slip slide rail 5 includes a slide rail base 501 bolted to the bottom of the elevator car 1. This slide rail base 501 provides an installation reference for other locking components. A sliding limit block 505 is slidably connected to the slide rail base 501 along its length. A groove is provided on the side wall of the sliding limit block 505. A transmission swing arm 503 is also rotatably connected to the slide rail base 501 via a transmission bearing 504. One end of the transmission swing arm 503 is drively connected to the sliding limit block 505 for driving... The sliding limit block 505 slides back and forth along the slide rail base 501. The slide rail base 501 is also provided with a limit positioning bead 507. This limit positioning bead 507 is a spring-preloaded steel ball, which is embedded in the hole of the slide rail base 501. When the transmission swing arm 503 drives the sliding limit block 505 to move to the predetermined locking position, the limit positioning bead 507 will automatically pop out and lock into the groove of the sliding limit block 505, thereby locking the position of the sliding limit block 505 and forming the first mechanical lock. A guide rail limit lock 506 is also fixedly installed on the slide rail base 501. The guide rail limit lock 506 is located on the side close to the elevator guide rail 508. The guide rail limit lock 506 is an electromagnetic drive component, which includes an extendable locking tongue. The elevator guide rail 508 has a preset tooth groove corresponding to the position of the guide rail limit lock 506. After leveling, after receiving the control signal from the traction drive mechanism 4, the electromagnetic coil inside the guide rail limit lock 506 is energized to drive the locking tongue to extend and accurately engage in the tooth groove of the elevator guide rail 508, forming a second rigid lock. This internal self-locking formed by the sliding limit block 505 and the limit positioning bead 507, and the external rigid lock formed by the guide rail limit lock 506 and the elevator guide rail 508, constitute a double locking structure, ensuring the absolute stability of the elevator car 1 after leveling.

[0024] For the specific actuators that drive the swing arm 503 to swing and provide electrical signals to the guide rail limit lock 506, those skilled in the art can use a variety of conventional methods such as motors and electromagnets. Their internal control logic is a well-known technology in the field and will not be described in detail here.

[0025] In order to improve the response speed of the transmission swing arm 503 and reduce the motion resistance, the transmission swing arm 503 is connected to the slide rail base 501 by means of the transmission bearing 504 rotating around its axis. The transmission bearing 504 can be a deep groove ball bearing to ensure that the transmission swing arm 503 can quickly reach the position, thereby improving the locking response speed.

[0026] The guide rail limit lock 506 has an electromagnetic drive component. Its internal electromagnetic coil is energized when it receives a leveling locking electrical signal from the traction drive mechanism 4, thereby reliably driving the lock tongue to extend.

[0027] The traction drive mechanism 4 includes a traction machine mounting base 401 fixed on the load-bearing beam at the top of the shaft, and a traction drive 402 mounted on the traction machine mounting base 401. The traction drive 402 integrates a motor and a reducer, which is used to drive the elevator car 1 up and down through the wire rope 405. The drive chip 403 serves as the control core, which is used to calculate the position of the elevator car 1, control the rotation speed of the traction drive 402, and send a locking signal to the leveling anti-slip rail 5 when leveling. The anti-displacement wheel 404 is used to monitor the displacement speed of the wire rope 405 in real time, and transmits an abnormal signal to the drive chip 403 to trigger protection when slippage is detected.

[0028] In order to perform preliminary positioning of the elevator car 1 before the main locking mechanism is activated, the leveling anti-slip slide rail 5 also includes a positioning protrusion 502. The positioning protrusion 502 is a spring preloaded structure, which is installed on the slide rail base 501 and is used to cooperate with the corresponding slot opened at the bottom of the elevator car 1 to prevent the car from shifting to the left or right and to lay the foundation for longitudinal locking.

[0029] The elevator car 1 is also provided with a car sill 3 at the bottom of the entrance and exit. A bottom fixing plate 301 is fixed below the car sill 3. In the assembled state, the bottom fixing plate 301 abuts against the upper surface of the leveling anti-slip slide rail 5, which is used to help distribute the force when locked and further stabilize the relative position of the elevator car 1 and the leveling anti-slip slide rail 5.

[0030] The device also includes an elevator shaft frame 2, and elevator guide rails 508 are vertically fixed to the inner wall of the elevator shaft frame 2 by bolts or welding, providing stable support and guidance for the operation of the entire elevator system.

[0031] Working principle: During normal elevator operation, the drive chip 403 in the traction drive mechanism 4 controls the traction driver 402, which pulls the elevator car 1 along the elevator guide rail 508 smoothly through the steel wire rope 405. At this time, all locking components on the leveling anti-slip rail 5 are in the reset state. When the elevator car 1 reaches the target floor, the drive chip 403 controls the traction driver 402 to decelerate and accurately position. After the car sill 3 is aligned with the floor sill, the locking program is started. First, the spring-loaded positioning protrusion 502 engages with the slot at the bottom of the elevator car 1 for initial positioning. Then, the drive chip 403 issues a locking command, and the transmission swing arm 503 swings under the drive, pushing the sliding limit block 505 to slide along the slide rail base 501. When the sliding limit block 505 reaches the predetermined locking position, the limit positioning bead 507 automatically pops out and gets stuck in the groove on the side wall of the sliding limit block 505, forming the first mechanical self-locking. The driving chip 403 sends an electrical signal to the guide rail limit lock 506, driving its internal locking tongue to extend and firmly engage in the tooth groove of the elevator guide rail 508, forming a second rigid lock. This is achieved through the synergistic effect of the internal self-locking of the sliding limit block 505 and the external rigid lock of the guide rail limit lock 506 and the elevator guide rail 508. By directly fixing the elevator car 1 to the elevator guide rail 508, the dependence on the brake of the traction drive mechanism 4 is completely eliminated, solving the problem of leveling slippage caused by the elastic deformation of the wire rope or the wear of the brake in the prior art. In the leveling locked state, the anti-displacement wheel 404 in the traction drive mechanism 4 continuously monitors the slight displacement of the wire rope 405. Once any abnormal slippage trend is detected, the anti-displacement wheel 404 immediately transmits the signal to the drive chip 403. After receiving the slippage signal, the drive chip 403 will ensure that all locking components remain locked and at the same time cut off the power supply to the traction drive 402, achieving double safety protection. When the elevator needs to run again, the drive chip 403 sends an unlocking signal, the locking tongue of the guide rail limit lock 506 retracts, and the transmission swing arm 503 reverses its movement to reset the sliding limit block 505. After all locking mechanisms are completely released, the elevator car 1 resumes normal operation.

Claims

1. A leveling anti-slip device for a car elevator, comprising an elevator car (1), the elevator car (1) being slidably connected to an elevator guide rail (508), further comprising a traction drive mechanism (4) for driving the elevator car (1) to rise and fall, and a leveling anti-slip slide rail (5) fixed to the bottom of the elevator car (1), characterized in that: The leveling anti-slip slide rail (5) includes a slide rail base (501) fixed to the bottom of the elevator car (1), and the slide rail base (501) is provided with: A sliding limit block (505) that can slide along the slide rail base (501) is provided with a groove; a transmission swing arm (503) for driving the sliding limit block (505) to slide. And a limiting positioning bead (507) disposed on the slide rail base (501) and used to engage with the groove to form a first mechanical lock; The leveling anti-slip slide rail (5) also includes a guide rail limit lock (506). The guide rail limit lock (506) is set on the side close to the elevator guide rail (508) and is used to extend the locking tongue to engage in the preset tooth groove on the elevator guide rail (508) after receiving the locking signal, forming a second rigid lock.

2. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The transmission swing arm (503) rotates about its axis via the transmission bearing (504) to drive the sliding limit block (505).

3. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The guide rail limit lock (506) is an electromagnetic drive structure, which drives the lock tongue to extend when it receives a leveling locking electrical signal from the traction drive mechanism (4).

4. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The limiting positioning bead (507) is a spring-loaded steel ball that is embedded in the hole of the slide rail base (501) and automatically pops out when the sliding limiting block (505) slides to the locking position and is locked into the groove of the sliding limiting block (505).

5. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The leveling anti-slip slide rail (5) also includes a positioning protrusion (502), which is a spring preloaded structure used to pre-position itself in cooperation with the slot at the bottom of the elevator car (1) before locking.

6. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The traction drive mechanism (4) includes: A traction machine mounting base (401) fixed to the top of the shaft; a traction drive (402) mounted on the traction machine mounting base (401) for driving the elevator car (1) via a wire rope (405). The driving chip (403) is used to control the traction driver (402) and send the locking signal to the leveling anti-slip slide rail (5); And an anti-displacement wheel (404) is used to monitor the displacement of the wire rope (405) and transmit abnormal signals to the drive chip (403).

7. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The device also includes an elevator shaft frame (2), on which the elevator guide rail (508) is fixed.

8. The leveling and anti-slip device for a car elevator according to claim 1, characterized in that, The elevator car (1) is also provided with a car sill (3) at the bottom of the entrance and exit. The car sill (3) is provided with a bottom fixing plate (301) at the bottom. The bottom fixing plate (301) abuts against the upper surface of the leveling anti-slip slide rail (5) and is used to help stabilize the position of the elevator car (1) when locked.

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