Elevator landing door anti-collision device and anti-collision elevator
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG HUAKAI ELEVATOR
- Filing Date
- 2025-09-18
- Publication Date
- 2026-06-16
Smart Images
Figure CN224362354U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of elevator equipment technology, and in particular to an elevator landing door anti-collision device and an anti-collision elevator. Background Technology
[0002] In the field of elevator safety, the impact resistance of landing doors is directly related to passenger safety. Traditional impact resistance design mainly focuses on passive protection, such as adding reinforcing ribs inside the landing door to enhance overall rigidity, or laying cushioning materials on the back of the landing door to absorb impact energy. However, these methods have significant limitations: reinforcing ribs significantly increase the weight and cost of the door panel, and their effectiveness in dispersing and transmitting impact force is limited; cushioning materials are prone to aging and failure, and their protective effect against severe concentrated impacts is poor; reinforcing ribs or cushioning materials cannot effectively dissipate impact force.
[0003] To address the aforementioned issues, some active locking anti-collision solutions have emerged in the existing technology. For example, electromagnetic drive pins are inserted into fixing slots to strengthen the connection between the landing door and the door frame. However, these solutions are structurally complex and space-consuming. The drive device and its transmission mechanism often occupy a large amount of space inside the landing door, making it difficult to arrange with existing components such as the door operator system and hanging plates. They may even require sacrificing the thickness or internal structure of the landing door, resulting in poor versatility. Some solutions have a single locking point, such as locking only in the middle, which fails to efficiently disperse and transmit the impact force to the strongest upper and lower tracks in the hoistway. This means that even under a large lateral impact, the landing door may still overturn or derail. Utility Model Content
[0004] The purpose of this utility model is to provide an elevator landing door anti-collision device and an anti-collision elevator to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] This utility model provides an elevator landing door anti-collision device, comprising:
[0007] The elevator landing door has movable blocks protruding from the elevator landing door and / or retracting from the elevator landing door at its upper and lower ends, respectively. The upper and lower door rails of the elevator landing door are respectively provided with positioning grooves corresponding to the movable blocks.
[0008] A cross-support assembly has two steel arms that are hinged together at the middle. The steel arms are installed inside the elevator landing door through a hinge shaft, and the hinge shaft is located at the middle position of the elevator landing door in the vertical direction. The ends of the steel arms are hinged with sliding blocks, and the sliding blocks are slidably connected to the movable blocks.
[0009] A linkage assembly has an upper linkage and a lower linkage. One end of the upper linkage is hinged to the upper part of a steel arm, and one end of the lower linkage is hinged to the lower part of another steel arm. The other ends of the upper linkage and the lower linkage are hinged together to form a driving hinge point. The driving hinge point is at the same horizontal height as the hinge axis.
[0010] A bistable electromagnet is fixed inside the elevator landing door and at the same horizontal height as the hinge shaft. The movable iron core of the bistable electromagnet is arranged horizontally and its end is connected to the drive hinge point.
[0011] Compared to traditional elevator landing doors where reinforcing ribs or cushioning materials cannot effectively dissipate impact force, this technical solution employs a cross-support assembly. This assembly forms a robust, rigid structure connecting the landing door, the cross-bracing steel arms, and the tracks. Upon impact, the force is immediately transmitted through the cross-bracing steel arms to the sturdy upper and lower door tracks, rather than being borne solely by the landing door. This significantly improves impact resistance and derailment prevention. Furthermore, the linkage design places the drive hinge point and the hinge axis of the steel arm at the same horizontal level and directly connects them to the movable core of the bistable electromagnet. This results in a short and efficient power transmission path, utilizing the space in the middle of the elevator landing door cavity and avoiding interference with other components above and below the door. This solves the problems of complex and space-consuming traditional drive mechanisms.
[0012] As an extension of the above solution: When the bistable electromagnet is in its first stable state, the movable iron core pushes the drive hinge point toward the hinge axis, causing the upper and lower connecting rods to spread the two steel arms. The cross support assembly is in the spread position, where the distance between the two ends of the steel arms in the vertical direction increases, allowing the movable block to insert into the positioning slot from the elevator landing door. The first stable state of this technical solution is the working state when the elevator landing door is closed. In this state, the bistable electromagnet provides a holding force to keep the cross support assembly in the spread position, thereby supporting the movable blocks at both ends to insert into the positioning slot. The impact force received by the elevator landing door is directly transmitted to the strongest upper and lower door rails in the shaft through the cross steel arms, solving the problem of insufficient impact resistance of traditional elevator landing doors.
[0013] As an extension of the above solution: When the bistable electromagnet is in the second stable state, the movable iron core pulls back the drive hinge point, causing the upper and lower connecting rods to retract their two steel arms. The cross support assembly is in the retracted position, where the vertical distance between the two ends of the steel arms decreases, allowing the movable block to retract into the elevator landing door via its self-positioning groove. The second stable state of this technical solution is the working state with the elevator landing door open. In this state, the bistable electromagnet provides a holding force to keep the cross support assembly in the retracted position, thereby keeping the movable blocks at both ends retracted into the elevator landing door, ensuring the flatness of the landing door end face and not affecting the normal operation of the elevator.
[0014] As an extension of the above solution: when the elevator door retracts, the movable block is flush with the end face of the elevator door. This ensures the aesthetics of the elevator door in its normal state, prevents tripping or snagging of items, and improves safety.
[0015] As an extension of the above solution: The elevator landing door has slots at both its upper and lower ends, and the movable block is sealed to the slots. An effective barrier is established at the dynamic joint between the movable block and the elevator landing door slots to prevent the passage of flames, smoke, airflow, and moisture, while not affecting the normal extension and retraction of the movable block.
[0016] As an extension of the above solution: a guide rail is provided on the inner side of the slot, and the movable block is provided with a guide lug that is embedded in the guide rail. In this technical solution, the guide rail is arranged vertically to restrict the movement of the movable block in the vertical direction, so as to accurately align and insert it into the positioning slot and prevent the mechanism from failing to lock or being damaged due to jamming or tilting.
[0017] As an extension of the above solution: a sliding groove is provided on the side of the movable block that contacts the sliding block. The sliding groove is a dovetail groove or a T-shaped groove. The sliding block is provided with a sliding lug that cooperates with the sliding groove, so that the movable block and the sliding block are always in contact in the vertical direction and do not derail, and slide relative to each other in the horizontal direction. The dovetail groove or T-shaped groove is a standard mechanical structure, which has the characteristics of anti-derailment and unidirectional constraint, and can effectively convert the rotation of the steel arm into the vertical movement of the movable block.
[0018] As an extension of the above solution: the elevator landing door is equipped with an unlocking assembly, which includes an unlocking shaft, an unlocking lever, and an unlocking lever. The unlocking lever is mounted on the unlocking shaft, and the unlocking lever includes a long lever arm, a short lever arm, and a fulcrum. A slot is provided on the long lever arm, and the end of the unlocking lever is mounted in the slot via a shaft, so that when the unlocking shaft rotates, it pushes the long lever arm to rotate around the fulcrum. A push plate is provided at the end of the short lever arm, and a reset plate is provided at the tail of the movable iron core. When the long lever arm and the short lever arm rotate, the push plate abuts against the reset plate and pushes the reset plate, causing the movable iron core to move towards the tail.
[0019] In the event of a power outage or a malfunction of the bistable electromagnet requiring manual emergency unlocking, the maintenance personnel rotate the unlocking shaft by a certain angle, such as 70°-90°. The unlocking lever, fixed to the unlocking shaft, rotates synchronously. The end of the rotating unlocking lever slides in a slot via a shaft, pushing the long arm of the unlocking lever. The long arm rotates around its fulcrum, generating a magnified output force at the end of the short arm. This force pushes the reset plate via the push plate on the short arm, which in turn acts on the movable iron core, pulling it back to its original position. The movable iron core moves towards its tail, causing the drive hinge point to move away from the hinge shaft on the steel arm. This causes the upper and lower connecting rods to retract the two steel arms, and the movable block retracts from its positioning slot into the elevator door, releasing the locked elevator door and allowing it to be opened normally. By amplifying the force of rotating the unlocking shaft through the lever principle, one person can easily and reliably unlock the elevator manually in an emergency.
[0020] As an extension of the above solution: the outer surface of the elevator landing door is provided with a hexagonal wrench interface that is connected to the unlocking shaft, and a limit block is provided inside the elevator landing door on one side of the long lever arm. In case of manual emergency unlocking, maintenance personnel can easily unlock the door by inserting a standard hexagonal wrench into the hexagonal wrench interface and turning it, improving the adaptability of safe unlocking. The limit block restricts the rotation of the long lever arm in the direction on which the limit block is located, and can play a foolproof role in emergency situations. If the user is restricted when turning the unlocking shaft towards the limit block side, they can then rotate the unlocking shaft in the correct direction on the other side, improving the efficiency of safe unlocking.
[0021] On the other hand, this utility model also provides an anti-collision elevator, including an elevator landing door anti-collision device as described above.
[0022] Compared to the problem that traditional elevator landing doors cannot effectively dissipate impact force due to their reinforcing ribs or cushioning materials, this utility model adopts a cross-support component, which forms a stable rigid structure with the landing door, the cross steel arms and the track. Once the elevator landing door is hit, the impact force will be directly transmitted to the sturdy upper and lower door tracks through the cross steel arms, rather than being borne by the landing door alone, thereby greatly improving the impact resistance and anti-derailment ability. Attached Figure Description
[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0024] Figure 1 This is a structural schematic diagram of the elevator landing door in the open state according to an embodiment;
[0025] Figure 2 This is a structural schematic diagram of the elevator landing door in the closed state according to an embodiment;
[0026] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle.
[0027] In the attached diagram: 100: Elevator landing door; 110: Movable block; 111: Sliding groove; 120: Upper door rail; 130: Lower door rail; 140: Positioning groove; 150: Groove; 151: Guide rail; 160: Unlocking shaft; 170: Unlocking lever; 180: Unlocking lever; 181: Long lever arm; 182: Short lever arm; 183: Fulcrum; 184: Slot; 185: Push plate; 190: Limiting block; 200: Cross support assembly; 210: Steel arm; 220: Hinge shaft; 230: Sliding block; 310: Upper connecting rod; 320: Lower connecting rod; 330: Drive hinge point; 400: Bistable electromagnet; 410: Movable iron core; 411: Reset plate. Detailed Implementation
[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0030] In the description of this utility model, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.
[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0032] Reference Figures 1 to 3 The following are several embodiments of an elevator landing door anti-collision device and an anti-collision elevator according to the present invention.
[0033] In some embodiments, such as Figures 1 to 3 As shown, an elevator landing door anti-collision device includes:
[0034] The elevator landing door 100 has movable blocks 110 protruding from the elevator landing door and / or retracting from the elevator landing door at its upper and lower ends, respectively. The upper door rail 120 and lower door rail 130 of the elevator landing door 100 are respectively provided with positioning grooves 140 corresponding to the movable blocks 110.
[0035] The cross support assembly 200 has two steel arms 210 that are hinged together at the middle. The steel arms 210 are installed inside the elevator landing door 100 through a hinge shaft 220, and the hinge shaft 220 is located at the middle position in the vertical direction of the elevator landing door 100. The ends of the steel arms 210 are hinged with sliding blocks 230, and the sliding blocks 230 are slidably connected to the movable block 110.
[0036] The linkage assembly has an upper linkage 310 and a lower linkage 320. One end of the upper linkage 310 is hinged to the upper part of a steel arm 210, and one end of the lower linkage 320 is hinged to the lower part of another steel arm 210. The other ends of the upper linkage 310 and the lower linkage 320 are hinged together to form a driving hinge point 330. The driving hinge point 330 is at the same horizontal height as the hinge shaft 220.
[0037] A bistable electromagnet 400 is fixed inside the elevator landing door 100 and is at the same horizontal height as the hinge shaft 220. The movable iron core 410 of the bistable electromagnet 400 is arranged horizontally and its end is connected to the drive hinge point 330.
[0038] In this embodiment, the cross-bracing assembly is the main load-bearing component. The cross-sectional shape of the two steel arms is rectangular. If rectangular tubing is used, the material can be Q235B or higher strength steel, with a thickness of 3-5mm, which needs to be determined based on the impact resistance rating. The drive hinge point and the hinge shaft are at the same horizontal level, ensuring that the horizontal thrust generated by the bistable electromagnet can be most effectively converted into a torque that unfolds the steel arms through the connecting rods, avoiding unnecessary bending moments, maximizing transmission efficiency, and minimizing the required electromagnet thrust. The core parameters of the bistable electromagnet are the holding force (e.g., 300N-500N) and the stroke (30-50mm). The specific stroke setting is determined by technicians based on the cross angle of the cross-shaped steel arms and the distance between the upper and lower connecting rods hinged to the steel arms and the hinge shaft. Figure 1 The approximate positional relationship of the upper and lower connecting rods shown is one embodiment. To clearly illustrate the working method of the upper and lower connecting rods, the middle position of the upper part of the steel arm is hinged to the connecting rod. In practical applications, according to the stroke of the electromagnet, the position on the steel arm should be set closer to the hinge axis to the connecting rod. This utility model does not impose any restrictions on the specific hinge position of the connecting rod group and the steel arm or the specific displacement parameters of the driving hinge point. As long as the working principle of the four-bar linkage can be used to push the driving hinge point to realize the opening and / or retraction of the cross steel arm, it is acceptable.
[0039] In this embodiment, after the elevator landing door closes, the bistable electromagnet is energized, and the movable iron core extends horizontally, pushing the drive hinge point to move horizontally toward the hinge axis. Through the transmission of the upper and lower connecting rods, the horizontal movement is converted into pushing the upper and lower parts of the two steel arms, forcing the cross steel arms to expand or retract around the hinge axis in the middle. During the pushing process, the two steel arms move in a more vertical posture, that is, the projection distance between the two ends of the steel arms in the vertical direction increases, thereby driving the sliding blocks at both ends of the steel arms to move closer to each other on the movable block. During the movement of the sliding blocks, due to the change in the vertical distance between the two ends of the steel arms, the movable block extends out of the elevator landing door and inserts into the positioning groove. In this state, when the elevator landing door is hit or impacted, the impact force can be directly transmitted to the strongest upper and lower door rails in the shaft through the cross steel arms, realizing the optimal path transmission of force and fundamentally solving the problem of insufficient impact resistance of the landing door itself. When the elevator landing door needs to be opened, the movable iron core is first pulled back horizontally by a bistable electromagnet. Through the transmission of the upper and lower connecting rods, the horizontal movement is converted into the pull back of the upper and lower parts of the two steel arms, forcing the crossed steel arms to retract or expand around the hinge axis in the middle. During the pull-back process, the two steel arms tend to move in a horizontal posture, that is, the projection distance between the two ends of the steel arms in the vertical direction decreases, thereby causing the sliding blocks at both ends of the steel arms to move away from each other on the movable block. During the movement of the sliding blocks, due to the change in the vertical distance between the two ends of the steel arms, the movable block retracts into the elevator landing door and returns from the positioning slot into the elevator landing door. At this time, the movable block does not affect the normal operation of the elevator landing door.
[0040] Compared to traditional elevator landing doors where reinforcing ribs or cushioning materials cannot effectively dissipate impact force, this embodiment employs a cross-support assembly. This assembly forms a robust, rigid structure connecting the landing door, the cross-bracing steel arms, and the tracks. Upon impact, the force is immediately transmitted directly to the sturdy upper and lower door tracks via the cross-bracing steel arms, rather than being borne solely by the landing door. This significantly improves impact resistance and derailment prevention. Furthermore, this embodiment utilizes a linkage design, arranging the drive hinge point and the hinge axis of the steel arms at the same horizontal level and directly connecting them to the movable core of the bistable electromagnet. This results in a short and efficient power transmission path, utilizing the space in the middle of the elevator landing door cavity and avoiding interference with other components above and below the landing door. This solves the problems of complex and space-consuming traditional drive mechanisms.
[0041] In some embodiments, such as Figure 2 As shown, the bistable electromagnet 400 is in the first stable state (i.e., Figure 2(As shown in the extended state of the movable iron core), the movable iron core 410 pushes the drive hinge point 330 toward the hinge shaft 220, causing the upper connecting rod 310 and the lower connecting rod 320 to spread the two steel arms 210. The cross support assembly 200 is in the spread position, where the distance between the two ends of the steel arms 210 in the vertical direction increases, allowing the movable block 110 to insert into the positioning slot 140 from the elevator landing door 100. The first steady state of this embodiment is the working state when the elevator landing door is closed. In this state, the bistable electromagnet provides a holding force to keep the cross support assembly in the spread position, thereby supporting the movable blocks at both ends to insert into the positioning slot. The impact force received by the elevator landing door is directly transmitted to the strongest upper and lower door rails in the shaft through the cross steel arms, solving the problem of insufficient impact resistance of traditional elevator landing doors.
[0042] In some embodiments, such as Figure 1 As shown, the bistable electromagnet 400 is in the second stable state (i.e., Figure 1 (As shown in the retracted state of the movable iron core), the movable iron core 410 retracts the drive hinge point 330, causing the upper connecting rod 310 and the lower connecting rod 320 to retract the two steel arms 210. The cross support assembly 200 is in the retracted position, where the distance between the two ends of the steel arms 210 in the vertical direction is reduced, allowing the movable block 110 to retract into the elevator landing door 100 from the positioning groove 140. The second steady state of this embodiment is the working state with the elevator landing door open. In this state, a holding force is provided by a bistable electromagnet to keep the cross support assembly in the retracted position, thereby keeping the movable blocks at both ends retracted into the elevator landing door, ensuring the flatness of the landing door end face and not affecting the normal operation of the elevator.
[0043] In some embodiments, such as Figure 3 As shown, when the elevator door 100 retracts, the movable block 110 is flush with the end face of the elevator door 100. This ensures the aesthetic appearance of the elevator door in its normal state, prevents tripping or snagging of items, and improves safety.
[0044] In some embodiments, such as Figure 3As shown, the elevator landing door 100 has slots 150 at both its upper and lower ends. The movable block 110 is sealed to the slots 150. This sealing means that an effective barrier is established at the dynamic joint between the movable block and the elevator landing door slot to prevent the passage of flames, smoke, airflow, and moisture, without affecting the normal expansion and contraction of the movable block. This can be achieved by creating a continuous sealing groove around the inner wall of the slot, into which a sealing strip with elastic and high-temperature resistant properties (such as silicone rubber or fluororubber, which are high-temperature resistant, flame-retardant, and aging-resistant) is embedded. In its natural state, the lip or tube portion of the sealing strip protrudes from the mounting surface, and the side of the movable block is in close contact with the elastic sealing strip, forming a seal. Alternatively, a flexible folding sealing layer can be used. For example, inside an elevator door, one end of a flexible, flame-retardant composite material (such as fiberglass cloth coated with fire-retardant adhesive) is fixed to the frame inside the slot, and the other end is fixed to the root of the movable block. When the movable block extends or retracts, the flexible folding sealing layer folds or unfolds accordingly, always covering the gap between the movable block and the slot.
[0045] In some embodiments, such as Figure 3 As shown, a guide rail 151 is provided on the inner side of the slot 150, and the movable block 110 is provided with a guide lug (not shown in the figure) that is embedded in the guide rail 151. In this embodiment, the guide rail is arranged vertically to restrict the movement of the movable block in the vertical direction, so as to accurately align and insert into the positioning slot and prevent the mechanism from failing to lock or being damaged due to jamming or tilting. The guide rail can be a simple U-shaped channel steel. The fit tolerance between the guide lug and the guide rail must ensure smooth sliding without excessive wobble. Regular lubrication and maintenance can further ensure the smooth sliding of the movable block and reduce the driving force of the cross steel arm.
[0046] In some embodiments, such as Figure 3 As shown, the movable block 110 is provided with a sliding groove 111 on the side that contacts the sliding block 230. The sliding groove 111 is a dovetail groove or a T-shaped groove. The sliding block 230 is provided with a sliding lug (not shown in the figure) that cooperates with the sliding groove 111, so that the movable block 110 and the sliding block 230 are always in contact in the vertical direction and do not derail, and slide relative to each other in the horizontal direction. The dovetail groove or T-shaped groove is a standard mechanical structure, which has the characteristics of anti-derailment and unidirectional constraint, and can effectively convert the rotation of the steel arm into the vertical movement of the movable block.
[0047] In some embodiments, such as Figure 1 and Figure 2As shown, the elevator landing door 100 is equipped with an unlocking assembly, which includes an unlocking shaft 160, an unlocking lever 170, and an unlocking lever 180. The unlocking lever 170 is mounted on the unlocking shaft 160. The unlocking lever 180 includes a long lever arm 181, a short lever arm 182, and a fulcrum 183. The fulcrum 183 is a pivot fixed to the landing door frame. The long lever arm 181 and the short lever arm 182 are an integral rigid structure. A slot 184 is provided on the long lever arm 181. The end of the unlocking lever 170 is installed in the slot 184 through a shaft, so that when the unlocking shaft 160 rotates, it pushes the long lever arm 181 to rotate around the fulcrum 183. The end of the short lever arm 182 is provided with a push plate 185. The tail of the movable iron core 410 is provided with a reset plate 411. When the long lever arm 181 and the short lever arm 182 rotate, the push plate 185 abuts against the reset plate 411 and pushes the reset plate 411, so that the movable iron core 410 moves towards the tail.
[0048] In this embodiment, when the elevator experiences a power outage or a malfunction of the bistable electromagnet, requiring manual emergency unlocking, the maintenance personnel rotate the unlocking shaft by a certain angle, such as 70°-90°. The unlocking lever fixedly mounted on the unlocking shaft rotates synchronously. The end of the rotating unlocking lever slides in a slot through a shaft, pushing the long arm of the unlocking lever. The long arm rotates around the fulcrum, generating an output force amplified several times at the end of the short arm. This force pushes the reset plate through the push plate on the short arm, which in turn acts on the movable iron core, pulling it back to its reset position. The movable iron core moves towards its tail, causing the drive hinge point to move away from the hinge shaft on the steel arm. This causes the upper and lower connecting rods to retract the two steel arms, and the movable block retracts from its positioning slot into the elevator door. The elevator door is then unlocked and can be opened normally. This embodiment amplifies the force of rotating the unlocking shaft through the lever principle, allowing for easy and reliable manual unlocking by one person in an emergency.
[0049] In some embodiments, such as Figure 1 and Figure 2 As shown, the outer surface of the elevator landing door 100 is provided with a hexagonal wrench interface that is kinetically connected to the unlocking shaft 160. Inside the elevator landing door 100, a limiting block 190 is provided on one side of the long lever arm 181. In case of manual emergency unlocking, maintenance personnel can easily unlock the door by inserting a standard hexagonal wrench into the hexagonal wrench interface and turning it, improving the adaptability of safe unlocking. The limiting block restricts the rotation of the long lever arm in the direction on which the limiting block is located, providing a foolproof function in emergencies. If the user is restricted when turning the unlocking shaft towards the limiting block side, they can rotate the unlocking shaft in the correct direction on the other side, improving the efficiency of safe unlocking.
[0050] Those skilled in the art will understand that, during normal operation, the unlocking lever can maintain the same posture through the frictional forces of the unlocking shaft, the shaft in the slot, the pivot shaft, and other related transmission paths, and will not swing or change position unnecessarily under natural conditions or the influence of gravity. Figure 1 and Figure 2 The position and orientation of the unlocking lever shown can be maintained in this position during normal elevator door operation without external force. When manual unlocking is required, it is achieved by rotating the unlocking shaft. After maintenance or emergency handling, the unlocking shaft is rotated in the opposite direction to reset it. If not reset, the elevator door can also be reset during normal operation by the short lever arm being moved by the reset plate on the movable core as it moves towards the hinge axis. In some preferred embodiments, a torsion spring is fitted on the pivot shaft or unlocking shaft at the fulcrum, holding it in a position that does not affect the operation of the movable core during elevator door operation. This torsion spring provides reset capability after manual unlocking.
[0051] This utility model also provides an anti-collision elevator, including an elevator landing door anti-collision device as described in one or more of the above embodiments. Compared to the problem that traditional elevator landing door reinforcements or buffer materials cannot effectively dissipate impact force, this embodiment uses a cross-support assembly to form a stable rigid structure with the landing door, the cross steel arms, and the rails. Once the elevator landing door is impacted, the impact force is immediately transmitted directly to the robust upper and lower door rails through the cross steel arms, rather than being borne solely by the landing door, thus greatly improving impact resistance and derailment prevention. This embodiment, through the design of the linkage group, arranges the drive hinge point and the hinge axis of the steel arm at the same horizontal level and directly connects to the movable iron core of the bistable electromagnet. The power transmission path is short and efficient, utilizing the space in the middle of the elevator landing door cavity, avoiding interference with other components above and below the elevator landing door, and solving the problem of complex and space-consuming traditional drive mechanisms.
[0052] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.
Claims
1. An elevator landing door anti-collision device, characterized in that, include: The elevator landing door (100) has movable blocks protruding from the elevator landing door (100) and / or retracting from the elevator landing door (100) at its upper and lower ends respectively. The upper door rail (120) and lower door rail (130) of the elevator landing door (100) are respectively provided with positioning grooves (140) corresponding to the movable blocks (110). The cross support assembly (200) has two steel arms (210) that are hinged together at the middle. The steel arms (210) are installed inside the elevator landing door (100) through a hinge shaft (220) and the hinge shaft (220) is located at the middle position in the vertical direction of the elevator landing door (100). The ends of the steel arms (210) are hinged with sliding blocks (230), and the sliding blocks (230) are slidably connected to the movable block (110). A linkage assembly has an upper linkage (310) and a lower linkage (320), one end of the upper linkage (310) is hinged to the upper part of a steel arm (210), and one end of the lower linkage (320) is hinged to the lower part of another steel arm (210). The other ends of the upper linkage (310) and the lower linkage (320) are hinged together to form a drive hinge point (330), which is at the same horizontal height as the hinge axis (220). A bistable electromagnet (400) is fixed inside the elevator landing door (100) and is at the same horizontal height as the hinge shaft (220). The movable iron core (410) of the bistable electromagnet (400) is arranged horizontally and its end is connected to the drive hinge point (330).
2. The elevator landing door anti-collision device according to claim 1, characterized in that: When the bistable electromagnet (400) is in the first stable state, the movable iron core (410) pushes the drive hinge point (330) toward the hinge axis (220), so that the upper connecting rod (310) and the lower connecting rod (320) spread the two steel arms (210), and the cross support assembly (200) is in the spread position. The spread position is when the distance between the two ends of the steel arms (210) in the vertical direction increases so that the movable block (110) is inserted into the positioning groove (140) from the elevator landing door (100).
3. The elevator landing door anti-collision device according to claim 1, characterized in that: When the bistable electromagnet (400) is in the second stable state, the movable iron core (410) pulls back the drive hinge point (330) so that the upper connecting rod (310) and the lower connecting rod (320) retract the two steel arms (210), and the cross support assembly (200) is in the retracted position. The retracted position is when the distance between the two ends of the steel arms (210) in the vertical direction is reduced so that the movable block (110) retracts into the elevator landing door (100) from the positioning groove (140).
4. The elevator landing door anti-collision device according to claim 1, characterized in that: When the movable block (110) retracts the elevator landing door (100), the movable block (110) is flush with the end face of the elevator landing door (100).
5. The elevator landing door anti-collision device according to claim 4, characterized in that: The elevator landing door (100) has slots (150) at its upper and lower ends respectively, and the movable block (110) is sealed to the slots (150).
6. The elevator landing door anti-collision device according to claim 5, characterized in that: The slot (150) is provided with a guide rail (151) on its inner side, and the movable block (110) is provided with a guide lug that is embedded in the guide rail (151).
7. The elevator landing door anti-collision device according to claim 1, characterized in that: The movable block (110) is provided with a sliding groove (111) on the side that contacts the sliding block (230). The sliding groove (111) is a dovetail groove or a T-shaped groove. The sliding block (230) is provided with a sliding lug that cooperates with the sliding groove (111).
8. The elevator landing door anti-collision device according to claim 1, characterized in that: The elevator landing door (100) is equipped with an unlocking assembly, which includes an unlocking shaft (160), an unlocking lever (170), and an unlocking lever (180). The unlocking lever (170) is mounted on the unlocking shaft (160). The unlocking lever (180) includes a long lever arm (181), a short lever arm (182), and a fulcrum (183). A slot (184) is provided on the long lever arm (181). The end of the unlocking lever (170) is mounted on the slot (184) via a shaft. Within 184), when the unlocking shaft (160) rotates, it pushes the long lever arm (181) to rotate around the fulcrum (183). The end of the short lever arm (182) is provided with a push plate (185), and the tail of the movable iron core (410) is provided with a reset plate (411). When the long lever arm (181) and the short lever arm (182) rotate, the push plate (185) abuts against the reset plate (411) and pushes the reset plate (411), causing the movable iron core (410) to move towards the tail.
9. An elevator landing door anti-collision device according to claim 8, characterized in that: The outer surface of the elevator landing door (100) is provided with a hexagonal wrench interface that is connected to the unlocking shaft (160) in a transmission manner, and a limiting block (190) is provided inside the elevator landing door (100) on one side of the long lever arm (181).
10. A collision-resistant elevator, characterized in that: Including an elevator landing door anti-collision device as described in any one of claims 1-9.