Elevator non-contact deceleration switch structure

Abstract

This utility model discloses a non-contact deceleration switch structure for elevators, belonging to the field of elevator technology. It includes a U-shaped photoelectric switch and a blocking plate. The photoelectric switch is mounted on the elevator car via a connecting mechanism and is connected to the car control system. A bracket is connected to the fixed end of the blocking plate, and the bracket is fixed to the elevator guide rail by a guide rail clamp. The trigger end of the blocking plate passes vertically through the U-shaped notch of the photoelectric switch, and a slot for controlling the on / off state of the photoelectric signal is provided on the trigger end of the blocking plate. This utility model, through the cooperation of the U-shaped photoelectric switch and the blocking plate, utilizes the blocking and recovery of the photoelectric signal to achieve triggering, accurately detecting the position of the car. Without any mechanical moving parts or contact points, it fundamentally avoids problems such as wear, jamming, and arc oxidation. Its service life is equivalent to that of the photoelectric switch itself, greatly reducing the failure rate.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to a non-contact deceleration switch structure for elevators. Background Technology

[0002] In the current elevator industry, contact-type deceleration switches are commonly used to determine the elevator deceleration position. Their core structure and working principle are as follows: Figure 3 As shown, a bumper 8 is fixedly installed on the side wall of the elevator car 7, and a contact-type deceleration switch 10 is fixed in the elevator shaft at the corresponding deceleration position via a metal bracket 11. The trigger end of the contact-type deceleration switch 10 is a rotatable roller, which is mechanically connected to the conductive contacts inside the switch via a connecting rod. Each contact-type deceleration switch 10 needs to be individually connected to the signal input terminal of the elevator control cabinet via a cable 9. When the elevator car 7 runs to the preset deceleration position, the bumper 8 on the car will mechanically squeeze the roller of the corresponding contact-type deceleration switch 10 in the shaft, forcing the roller to rotate around its axis. This, in turn, drives the contacts inside the switch to close or open via the connecting rod, generating an electrical signal that is transmitted to the control cabinet. The control cabinet determines that the elevator has reached the deceleration position based on this electrical signal and then outputs a deceleration control command to realize the deceleration operation of the elevator.

[0003] However, contact switches rely on mechanical collisions and the mechanical movement of rollers and links to trigger contacts. During long-term operation, problems such as rollers easily shrinking in diameter due to friction and wear, links easily deforming due to stress leading to transmission failure, spring failure, and poor contact due to oxidation or dust accumulation frequently occur, resulting in a shortened switch life. Utility Model Content

[0004] The purpose of this utility model is to provide a non-contact deceleration switch structure for elevators, which uses a concave photoelectric switch in conjunction with a baffle plate. Triggering is achieved through photoelectric signal blocking and recovery, completely eliminating mechanical contact wear and extending the service life of the switch, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-contact deceleration switch structure for elevators, comprising a U-shaped photoelectric switch and a baffle plate. The photoelectric switch is installed on the elevator car via a connecting mechanism and is connected to the car control system. A bracket is connected to the fixed end of the baffle plate, and the bracket is fixed to the elevator guide rail via a guide rail clamp. The trigger end of the baffle plate passes through the U-shaped notch of the photoelectric switch in a vertical direction, and a slot for controlling the on / off state of the photoelectric signal is provided on the trigger end of the baffle plate.

[0006] Preferably, the photoelectric switch is a through-beam or light-shielding photoelectric switch, and the photoelectric switch is provided with mounting holes for the installation of the connection mechanism.

[0007] Preferably, the transmitting end and the receiving end of the photoelectric switch are located on both sides of the notch, and the width of the notch of the photoelectric switch is 20-60mm.

[0008] Preferably, the connecting mechanism includes a connecting plate, one end of which is connected to the outer wall of the elevator car by bolts, and the other end of which has a through hole that matches the mounting hole.

[0009] Preferably, the shield is an L-shaped metal plate, with the short plate of the shield being the fixed end and the long plate of the shield being the transmitting end, and multiple slots are provided.

[0010] Preferably, the length of the slot is 50mm ± 0.2mm, and the width of the slot matches the width of the notch of the photoelectric switch.

[0011] Preferably, the bracket has a zigzag cross-section when viewed from above. One end of the bracket is fitted with a guide rail clamp by bolts. The guide rail clamp is clamped and fixed to the elevator guide rail. The other end of the bracket is connected to the fixed end of the baffle plate by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model utilizes the combination of a U-shaped photoelectric switch and a baffle plate to trigger the photoelectric signal by blocking and restoring it, accurately detecting the position of the car. It has no mechanical moving parts or contact points, fundamentally avoiding problems such as wear, jamming, and arc oxidation. Its service life is equivalent to that of the photoelectric switch itself, greatly reducing the failure rate.

[0014] 2. This utility model only requires one set of cables to be laid for the photoelectric switch on the car. There is no need to lay separate cables for each deceleration position in the hoistway, which greatly reduces the amount of wiring, reduces the risk of line interference and construction costs.

[0015] 3. This utility model eliminates the need to inspect the wear of mechanical parts; it only requires periodic cleaning of the dust on the surface of the photoelectric switch recess and the shield, thus reducing the difficulty of maintenance.

[0016] 4. The shape of the baffle and the position of the slot in this utility model can be flexibly set, so that one system can meet multiple signal requirements. The length of the baffle, the position of the slot, and the installation height can all be adjusted as needed. The guide rail clamp fixing method does not require damage to the shaft structure and can be adapted to the deceleration control requirements of different types and speeds of elevators such as residential, commercial, and medical elevators.

[0017] 5. This utility model realizes the switching on and off of photoelectric signals through the empty slot on the shielding plate, which effectively avoids false signals that may be caused by dust accumulation or momentary obstruction, and its anti-interference ability is far superior to simple high and low level signals. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a top view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the installation structure of a conventional contact-type deceleration switch.

[0021] In the diagram: 1. Photoelectric switch; 2. Baffle plate; 3. Bracket; 4. Elevator guide rail; 5. Guide rail clamp; 6. Connecting plate; 7. Elevator car; 8. Impact bow; 9. Cable; 10. Contact type deceleration switch; 11. Metal bracket. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-2 This utility model provides a technical solution: a non-contact deceleration switch structure for elevators, including a U-shaped photoelectric switch 1 and a shield 2. The photoelectric switch 1 is installed on the elevator car 7 through a connecting mechanism, and the photoelectric switch 1 is connected to the car control system. The car control system is an elevator's own control system, which includes a control cabinet for controlling the car's lifting and lowering. The photoelectric switch 1 transmits data to the control cabinet through the car's traveling cable. Only one set of cables 9 needs to be laid for the photoelectric switch 1 on the car. There is no need to lay separate wiring for each deceleration position in the shaft, which greatly reduces the amount of wiring, lowers the risk of line interference, and reduces construction costs. The fixed end of the shield 2 is connected to a bracket 3, and the bracket 3 is fixed to the elevator guide rail 4 by a guide rail clamp 5. The trigger end of the shield 2 passes through the U-shaped notch of the photoelectric switch 1 in a vertical direction, and the trigger end of the shield 2 is provided with a slot for controlling the on / off of the photoelectric signal. The on / off of the photoelectric signal is realized through the slot on the shield 2, which effectively avoids false signals that may be caused by dust accumulation or momentary obstruction. The anti-interference ability is far superior to simple high and low level signals.

[0024] By combining the U-shaped photoelectric switch 1 and the baffle plate 2, the blocking and recovery of photoelectric signals are used to trigger the system and accurately detect the position of the car. There are no mechanical moving parts or contact points, which fundamentally avoids the problems of wear, jamming and arc oxidation. The service life is the same as that of the photoelectric switch 1 itself, which greatly reduces the failure rate. There is no need to check the wear of mechanical parts. Only the dust on the surface of the recess of the photoelectric switch 1 and the baffle plate 2 needs to be cleaned regularly, which reduces the difficulty of maintenance.

[0025] The photoelectric switch 1 is a through-beam or light-shielding photoelectric switch. The photoelectric switch 1 is provided with mounting holes for the installation of the connecting mechanism. The mounting holes facilitate the installation of the photoelectric switch 1 on the connecting plate 6 that is installed with the elevator car 7 by bolts.

[0026] The transmitting end and receiving end of the photoelectric switch 1 are located on both sides of the notch. The width of the notch of the photoelectric switch 1 is 20-60mm. The notch of the photoelectric switch 1 is adapted to the passage size of the baffle plate 2. The photoelectric switch 1 moves up and down synchronously with the elevator car 7.

[0027] The connecting mechanism includes a connecting plate 6. One end of the connecting plate 6 is connected to the outer wall of the elevator car 7 by bolts. The other end of the connecting plate 6 has a through hole that matches the mounting hole. The connecting plate 6 is made of metal. The connecting plate 6 provides support for the photoelectric switch 1 to ensure the stability of the installation of the photoelectric switch 1.

[0028] The shielding plate 2 is an L-shaped metal plate. The short plate of the shielding plate 2 is the fixed end, and the long plate of the shielding plate 2 is the transmitting end. Multiple slots are provided. The shape of the shielding plate 2 and the position of the slots can be flexibly set, so that one system can meet multiple signal requirements. The length of the shielding plate 2, the position of the slots, and the installation height can all be adjusted as needed. The guide rail clamp 5 fixing method does not require damage to the shaft structure and can be adapted to the deceleration control requirements of different types and speeds of elevators such as residential, commercial, and medical elevators.

[0029] The length of the slot is 50mm ± 0.2mm, and the width of the slot matches the width of the notch of the photoelectric switch 1. The length of the trigger end of the baffle plate 2 is cut according to the trigger distance requirement of the photoelectric switch 1. The trigger distance is usually 200-400mm, and the position of the slot at the trigger end can be set at different positions and lengths according to the requirements of the deceleration stage. For example, the deceleration stage requires pre-deceleration, first-level deceleration, and second-level deceleration. After the baffle plate 2 is fixed, it ensures that when the elevator car 7 drives the photoelectric switch 1 to move, the trigger end can completely pass through the U-shaped notch of the photoelectric switch 1 in the vertical direction.

[0030] The bracket 3 has a zigzag cross-section when viewed from above. One end of the bracket 3 is bolted to a guide rail clamp 5, which clamps and fixes the bracket 5 to the elevator guide rail 4. The other end of the bracket 3 is bolted to the fixed end of the baffle plate 2. The bracket 3 provides support for the baffle plate 2, improving the stability of the baffle plate 2 installation. The baffle plate 2 is fixed by the guide rail clamp 5 without damaging the shaft structure. The installation position can be flexibly adjusted to adapt to the deceleration position requirements of different elevator specifications.

[0031] During installation, according to the elevator shaft height and deceleration requirements, at the location where deceleration is required (such as the top / bottom floor deceleration zone, or the inter-floor deceleration zone), adjust the height of the baffle plate 2, fix the baffle plate 2 on the guide rail using the guide rail clamp 5, and ensure that when the photoelectric switch 1 moves to this position, the trigger end of the baffle plate 2 can pass through the U-shaped notch of the photoelectric switch 1 in the vertical direction.

[0032] When the elevator is running, the elevator car 7 drives the photoelectric switch 1 to move up and down. When the car approaches the deceleration position, the trigger end of the baffle plate 2 gradually extends into the notch of the photoelectric switch 1, blocking the photoelectric signal (outputting an "off" signal at this time). When the photoelectric switch 1 continues to move and sweeps through the 50mm slot of the baffle plate 2, the photoelectric signal is restored (outputting an "on" signal). After leaving the slot and continuing to move to the blocking position, it blocks the photoelectric signal (outputting an "off" signal). When the photoelectric switch 1 leaves the trigger end of the baffle plate 2, the optical path is continuously restored, and the photoelectric switch 1 outputs an "on" signal, forming a multi-segment signal of "on-off-on-off-on". The unique "on-off-on" pulse signal effectively avoids false signals that may be caused by dust accumulation or momentary blocking, and its anti-interference ability is far superior to simple high and low level signals.

[0033] The control cabinet accurately determines the current deceleration stage of the elevator by receiving the timing of the "on-off-on" signal, the signal node corresponding to the empty slot position, and the duration of the signal, and then outputs the corresponding deceleration command. By creating an empty slot of a specific length in the middle of the baffle plate 2, the dual-edge (rising edge and falling edge) pulse signal generated by this design is more reliable than the simple "on-off" signal, effectively preventing malfunctions caused by vibration, contamination, or external interference. The signal has strong anti-interference ability and more accurate judgment. The 50mm long empty slot forms a differentiated "on-off-on" signal, which can adapt to multi-stage deceleration requirements.

[0034] For example, three deceleration positions are set in the shaft: the top deceleration zone (1.2m away from the top floor level), the bottom deceleration zone (1.2m away from the bottom floor level), and the middle floor deceleration zone (between the 5th and 6th floors, 0.8m away from the 5th floor level).

[0035] At each deceleration position, a baffle plate 2 is fixed by a guide rail clamp 5. The trigger end of the baffle plate 2 faces the direction of car movement, ensuring that when the photoelectric switch 1 moves to this position, the trigger end can be fully inserted into the notch.

[0036] When the elevator car 7 ascends to a position 1.2m away from the top floor level, the notch of the photoelectric switch 1 contacts the trigger end of the baffle plate 2 in the top floor deceleration zone:

[0037] Working process: When the elevator car 7 is running, the photoelectric switch 1 fixed on it moves accordingly. When the car reaches the deceleration point where the baffle plate 2 is installed, the free end of the baffle plate 2 begins to enter the groove of the photoelectric switch 1.

[0038] 1. When the light path of photoelectric switch 1 is blocked for the first time, the output signal changes from "on" to "off".

[0039] 2. As the elevator car 7 continues to move, the photoelectric switch 1 scans a specific length of empty slot (about 50mm) in the middle of the baffle plate 2, the optical path is restored, and the output signal changes from "off" back to "on".

[0040] 3. As the car continues to move, the end of the blind 2 blocks the light path again, and the signal changes from "on" to "off" again until it completely moves away. Thus, an "on-off-on" pulse signal is generated and transmitted to the control cabinet. By recognizing this unique pulse signal sequence, the control system can accurately determine that the car has reached the preset deceleration point and immediately initiate the deceleration program.

[0041] In summary, the core of replacing the existing "bumper 8 + contact switch" structure with a non-contact structure of "photoelectric switch 1 + baffle 2" lies in replacing the mechanical triggering component in the hoistway with baffle 2 and replacing the bumper 8 on the car with photoelectric switch 1. The deceleration signal is detected through non-contact photoelectric induction principle. There are no mechanical moving parts or contact points, which fundamentally avoids problems such as wear, jamming and arc oxidation, and extends the service life of photoelectric switch 1.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-contact deceleration switch structure for elevators, characterized in that: The device includes a U-shaped photoelectric switch (1) and a shield (2). The photoelectric switch (1) is installed on the elevator car (7) through a connecting mechanism and is connected to the car control system. The fixed end of the shield (2) is connected to a bracket (3). The bracket (3) is fixed on the elevator guide rail (4) by a guide rail clamp (5). The trigger end of the shield (2) passes through the U-shaped notch of the photoelectric switch (1) in a vertical direction. The trigger end of the shield (2) is provided with a slot for controlling the on / off of the photoelectric signal.

2. The elevator non-contact deceleration switch structure according to claim 1, characterized in that: The photoelectric switch (1) is a through-beam or light-shielding photoelectric switch, and the photoelectric switch (1) is provided with mounting holes for the installation of the connection mechanism.

3. The elevator non-contact deceleration switch structure according to claim 2, characterized in that: The transmitting end and receiving end of the photoelectric switch (1) are located on both sides of the notch, and the width of the notch of the photoelectric switch (1) is 20-60mm.

4. The elevator non-contact deceleration switch structure according to claim 3, characterized in that: The connecting mechanism includes a connecting plate (6), one end of which is connected to the outer wall of the elevator car (7) by bolts, and the other end of which is provided with a through hole that matches the mounting hole.

5. The elevator non-contact deceleration switch structure according to claim 4, characterized in that: The shielding plate (2) is an L-shaped metal plate. The short plate of the shielding plate (2) is the fixed end, the long plate of the shielding plate (2) is the transmitting end, and the slot is set in multiple places.

6. The elevator non-contact deceleration switch structure according to claim 5, characterized in that: The length of the slot is 50mm ± 0.2mm, and the width of the slot matches the width of the notch of the photoelectric switch (1).

7. The elevator non-contact deceleration switch structure according to claim 6, characterized in that: The top view of the bracket (3) is arranged in a broken line. One end of the bracket (3) is fitted with a guide rail clamp (5) by bolts. The guide rail clamp (5) is clamped and fixed to the elevator guide rail (4). The other end of the bracket (3) is connected to the fixed end of the baffle plate (2) by bolts.

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