A noise reduction device for a lift door

Abstract

The application discloses a car door noise reduction device, aiming at solving the problem that the gap between the door plate and the front wall in the prior art or the low assembly precision between the door plate and the front wall causes the noise to enter the car from the gap between the door plate and the front wall, and the user's riding experience is poor. The application solves the above technical problems through the following technical scheme: including: a sealing plate assembly arranged at the edge of the door plate, a driving device for driving the sealing plate assembly to be close to or away from the edge of the door plate, and a transmission device connected between the driving device and the sealing plate assembly. The driving device drives the sealing plate assembly to move through the transmission device, so that the sealing plate assembly can automatically adhere to the edge of the door plate according to the opening and closing condition of the door plate, thereby realizing that the sealing plate assembly can automatically block the gap between the door plate and the front wall when the elevator is running, so that the noise can be effectively blocked from entering the car from the gap between the door plate and the front wall, and the user's riding experience is improved.

Description

Technical Field

[0001] This invention relates to the field of elevator technology, and more specifically, to a car door noise reduction device. Background Technology

[0002] The noise and comfort issues in existing elevators have always been a difficult problem to solve in design and development. Most of the noise comes from the operation of other components outside the car and enters the car interior. In most cases, the noise is generated during elevator operation, and the higher the elevator speed, the louder the noise and the worse the passenger experience. Existing solutions usually use a U-shaped interlocking structure at the connection between the door panels. However, there are few solutions for dealing with the gap between the door panel and the front wall. In addition, existing side sealing of the door panels requires high installation precision and cannot completely block the gap between the inside and outside.

[0003] Chinese Patent Publication No. CN211444666U, published on September 8, 2020, is entitled "Elevator Door Panel Noise Reduction Device". This application discloses a structure for an elevator door panel noise reduction device, which mainly uses vibration damping rubber and vibration damping film on the inner surface of the door panel. This noise reduction is achieved by improving the noise reduction effect of the door panel itself. However, it cannot effectively solve the problem of noise entering the car from the gap between the front wall and the door panel. Summary of the Invention

[0004] This invention overcomes the shortcomings of existing technologies where gaps exist between the door panel and the front wall, or where low assembly precision between the door panel and the front wall allows noise to enter the car through these gaps, thus degrading the user's riding experience. It provides a car door noise reduction device that can seal the gap between the elevator and the front wall during elevator operation, effectively blocking noise from entering the car and improving the user's riding experience. Furthermore, it can automatically open the gap between the door panel and the front wall in the event of elevator malfunction, power outage, or power failure, ensuring air circulation with the outside environment and guaranteeing that the car has a clearance that meets standard ventilation requirements when passengers are trapped due to power outages or other malfunctions.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a car door noise reduction device, comprising: a sealing plate assembly disposed on the edge of the door panel, a driving device for driving the sealing plate assembly to move closer to or away from the edge of the door panel, wherein the driving device and the sealing plate assembly are connected by a transmission device.

[0006] In this invention, the drive device drives the sealing plate assembly to move through the transmission device, so that the sealing plate assembly can automatically fit against the edge of the door panel according to the opening and closing of the door panel. Thus, when the elevator is running, the sealing plate assembly can automatically seal the gap between the door panel and the front wall, thereby effectively blocking noise from entering the car from the gap between the door panel and the front wall, thereby improving the passenger experience.

[0007] Preferably, the transmission device includes a connecting rod and a connecting rod. The connecting rod is provided with a rotation fulcrum. One end of the connecting rod is rotatably connected to the end of the connecting rod, and the other end of the connecting rod is rotatably connected to the sealing plate assembly. The driving device is rotatably connected to the end of the connecting rod away from the connecting rod. The driving device drives the connecting rod to rotate around the rotation fulcrum.

[0008] By driving one end of the connecting rod to rotate through the drive device, the other end of the connecting rod can drive the sealing plate assembly to move. The transmission device is set according to the above structure, which has the characteristics of simple and compact structure.

[0009] Preferably, the sealing plate assembly is provided with a guide slide rod connected thereto, and the side wall of the edge of the door panel is provided with a guide block, the guide block is provided with a guide hole, and the guide slide rod passes through the guide hole.

[0010] The cooperation between the guide slide rod and the guide block makes the movement of the sealing plate assembly closer to or further away from the edge of the door panel more stable.

[0011] Preferably, the edge of the door panel is provided with a front wall that is parallel to it, and the guide hole is inclined in a direction away from the front wall.

[0012] The inclined setting of the guide hole allows the sealing plate assembly to move away from the edge of the door panel while moving away from the front wall, and the sealing plate assembly to move closer to the edge of the door panel while moving closer to the front wall.

[0013] Preferably, the transmission device is provided in two sets, which are symmetrically arranged on both sides of the drive device.

[0014] The inclined setting of the guide hole allows the sealing plate assembly to move away from the edge of the door panel while moving away from the front wall, and the sealing plate assembly to move closer to the edge of the door panel while moving closer to the front wall.

[0015] Preferably, the driving device includes an electromagnetic valve body fixedly installed on the inner side of the door panel edge, a valve stem is provided inside the electromagnetic valve body, an electromagnetic valve tongue is provided at the end of the valve stem, and the electromagnetic valve tongue is rotatably connected to the end of the connecting rod; a return spring is sleeved on the valve stem, and the return spring abuts between the electromagnetic valve body and the valve tongue.

[0016] By setting a reset spring, the valve stem can be automatically reset when the solenoid valve body is de-energized, thereby allowing the sealing plate assembly to automatically move away from the edge of the door panel.

[0017] Preferably, the sealing panel assembly includes a fixed plate and a sound insulation layer disposed on the fixed plate; the sound insulation layer is disposed on the side of the fixed plate that is close to the door panel.

[0018] By installing a sound insulation layer, the sealing and noise reduction effect can be effectively improved.

[0019] Preferably, the drive device includes a guide rod arranged along the width direction of the door panel and a thrust spring sleeved on the guide rod. One end of the guide rod is rotatably connected to the end of the connecting rod away from the connecting rod, and the other end of the guide rod abuts against the side of the door panel away from the sealing plate assembly. A magnet is provided at the end of the guide rod away from the sealing plate assembly. A fixing ring is fixedly arranged in the circumferential direction of the guide rod, and an abutting ring is fixedly arranged on the door panel. The guide rod passes through the abutting ring, and the thrust spring abuts between the fixing ring and the abutting spring.

[0020] When the elevator car entrance / exit opens, the thrust spring pushes the fixed ring, causing the transmission rod to move. This transmission rod then drives the connecting rod to rotate, causing the end of the connecting rod near the edge of the door panel to move towards the edge of the door panel. This moves the sealing plate assembly away from the edge of the door panel, thus opening the gap between the door panel and the front wall. When the elevator car entrance / exit closes, the two door panels come together, causing the magnets on the two door panels to stick together. Because the magnetic poles are the same, the magnets on the two door panels move away from each other, causing the transmission rods on the two door panels to move away from each other. This causes the transmission rod to move, driving the connecting rod at its end to rotate. This causes the end of the connecting rod to rotate away from the edge of the door panel, allowing the sealing plate assembly to fit into the gap between the door panel and the front wall. This prevents noise during elevator operation from entering the car, thus improving passenger comfort.

[0021] Preferably, a fixing sleeve is fixedly installed on the door panel, and a through hole is provided on the side wall of the fixing sleeve, and a plug is provided in the through hole to seal it.

[0022] The transmission rod includes a first transmission rod and a second transmission rod;

[0023] One end of the first transmission rod is rotatably connected to the connecting rod, and the other end of the first transmission rod is set inside the fixed sleeve;

[0024] A magnet is provided at one end of the second transmission rod, and the other end of the second transmission rod is located inside the fixed sleeve;

[0025] The fixed sleeve contains several abutting balls that abut against each other. These abutting balls form an abutting ball group, and the two ends of the abutting ball group abut against the first guide rod and the second guide rod, respectively.

[0026] When the elevator stops running due to a malfunction, the plug can be removed, allowing the abutment ball inside the fixed sleeve to be removed through the perforation. This allows the thrust spring to push the first transmission rod to move, causing the transmission rod to drive the connecting rod to rotate. This causes the end of the connecting rod near the connecting rod to move towards the edge of the door panel, thereby moving the sealing plate assembly away from the edge of the door panel and opening the gap between the door panel and the front wall, thus ensuring ventilation inside the car.

[0027] Preferably, the end of the transmission rod away from the sealing plate assembly is provided with several parallel taps, and the ends of the taps are provided with magnets.

[0028] By setting a tap, the pushing force of the magnet-driven transmission rod can be increased, enabling the sealing plate assembly to abut against the gap between the front wall and the door panel more quickly and stably.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] (1) The present invention can effectively block noise in the shaft from entering the car through the gap between the door panel and the front wall. The effect is more significant for high-speed or ultra-high-speed elevators, making the user experience better.

[0031] (2) By reducing the air circulation between the car and the shaft during elevator operation, this invention alleviates the discomfort caused to passengers by air pressure difference and improves the comfort of elevator ride.

[0032] (3) By using the present invention, the gap between the front wall and the door panel can be appropriately increased, thereby avoiding the noise caused by friction between the door panel and the front wall;

[0033] (4) When the device is powered on, the valve rod retracts and when the power is cut off, the valve rod extends, which can effectively ensure that the elevator car has a gap that meets the standard ventilation requirements when people are trapped due to power failure or other malfunctions. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0035] Figure 2 This is the front view of the present invention;

[0036] Figure 3 yes Figure 2 A magnified view of region A in the image;

[0037] Figure 4 yes Figure 3 A magnified view of region B in the image;

[0038] Figure 5 This is a top view of the door panel of the present invention engaging with the front wall when closed;

[0039] Figure 6 This is a schematic diagram of the cooperation between the guide slide rod and the guide block of the present invention;

[0040] Figure 7 This is a structural diagram of another embodiment of the present invention;

[0041] Figure 8 yes Figure 7 A magnified view of a portion of the image;

[0042] Figure 9 This is a schematic diagram of the perforation and plug structure in this invention;

[0043] In the diagram: 1. Door panel, 11. Drive shaft, 12. Guide block, 121. Guide hole, 13. Abutment ring, 14. Fixing sleeve, 141. Through hole, 142. Plug;

[0044] 2. Sealing plate assembly; 21. Fixing plate; 22. Sound insulation layer; 23. Guide slide bar;

[0045] 3. Transmission device; 31. Connecting rod; 311. Rotating hole; 32. Connecting rod;

[0046] 4. Solenoid valve body; 41. Valve stem; 42. Solenoid valve tongue; 43. Return spring;

[0047] 51. Conducting rod; 511. Fixing ring; 512. First conducting rod; 513. Second conducting rod; 52. Thrust spring; 53. Magnet; 54. Tap joint; 55. Abutment ball;

[0048] 6. Anterior wall. Detailed Implementation

[0049] The technical solution of the present invention will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0050] Example 1: Refer to Figures 1 to 6 As shown, a car door noise reduction device includes: a car, an entrance and exit provided on the car, front walls 6 on both sides of the entrance and exit, door panels 1 respectively provided on both sides of the entrance and exit, the door panels on both sides being parallel to the front walls on both sides, sealing plate assemblies 2 provided on the edges of the door panels, and a driving device and a transmission device 3 provided inside the door panels; the driving device drives the sealing plate assemblies to move closer to or away from the edges of the door panels, and the transmission device is located between the driving device and the sealing plate assemblies.

[0051] Specifically: the transmission device includes a connecting rod 31 and a connecting rod 32. The connecting rod is arranged along the length of the door panel. A rotating shaft 11 is fixedly arranged on the door panel. A rotating hole 311 is provided on the connecting rod. The rotating hole and the rotating shaft cooperate to form a rotating fulcrum. One end of the connecting rod is rotatably connected to the end of the connecting rod, and the other end of the connecting rod is rotatably connected to the sealing plate assembly. The driving device is rotatably connected to the end of the connecting rod away from the connecting rod. The driving device drives the connecting rod to rotate around the rotating fulcrum.

[0052] The sealing panel assembly is provided with a guide slide rod 23 vertically connected to it. The guide slide rod 23 is rotatably connected to the connecting rod. A guide block 12 is fixedly provided on the side wall of the door panel near the sealing panel assembly. A guide hole 121 is provided in the guide block, and the guide slide rod passes through the guide hole. The guide hole is inclined in the direction away from the front wall. Figure 6 As shown, the guide hole is tilted so that the sealing plate assembly is away from the edge of the door panel and away from the front wall at the same time, and the sealing plate assembly is close to the edge of the door panel and close to the front wall at the same time.

[0053] In this embodiment, there are two sets of transmission devices. The drive device is located at the middle position in the length direction of the door panel. The two sets of transmission devices are symmetrically arranged on both sides of the drive device, and the two sets of transmission devices are respectively connected to both ends of the sealing plate assembly. This allows the movement of the drive device to stably drive the sealing plate assembly to move parallel to or away from the edge of the door panel.

[0054] The drive device can use a hydraulic cylinder or other device to rotate the connecting rod away from the end of the connecting rod. In this embodiment, the drive device includes an electromagnetic valve body 4 fixedly mounted in the middle of the inner side of the door panel edge. A valve stem 41 is housed within the electromagnetic valve body, and an electromagnetic valve tongue 42 is located at the end of the valve stem. The electromagnetic valve tongue is rotatably connected to the end of the connecting rod, and the connection point between the connecting rod and the electromagnetic valve tongue is a long slot. A return spring 43 is fitted onto the valve stem, abutting against the electromagnetic valve body and the valve tongue. The electromagnetic valve body is connected to the elevator control device, so that when the elevator is running, the electromagnetic valve body is energized, causing the valve stem to retract. This causes the electromagnetic valve tongue to overcome the elastic force of the return spring, and the movement of the electromagnetic valve tongue drives the connecting rod to rotate around the pivot point. This causes the end of the connecting rod connected to the connecting rod to rotate away from the edge of the door panel, thereby causing the sealing plate assembly to fit against the gap between the door panel and the front wall. This seals the gap between the door panel and the front wall during elevator operation, improving passenger comfort. When the elevator stops running, the solenoid valve body is de-energized. Through the action of the return spring, the valve stem extends, which causes the solenoid valve tongue to move. The solenoid valve tongue drives the connecting rod to rotate, causing the end of the connecting rod connected to the connecting rod to rotate towards the edge of the door panel. This moves the sealing plate assembly away from the edge of the door panel, thus preventing friction between the sealing plate assembly and the front wall during the opening of the door panel.

[0055] In this embodiment, in order to improve the sealing and noise reduction effect, the sealing plate assembly is configured to include a fixed plate 21 and a sound insulation layer 22 disposed on the fixed plate. The sound insulation layer is composed of sound insulation cotton. The sound insulation layer is disposed on the side close to the fixed plate and close to the door panel.

[0056] The working principle of this embodiment is as follows: When the elevator is about to run, the door panel moves to close the car entrance and exit. After the car entrance and exit are closed, the solenoid valve body is energized, causing the valve rod to retract. This causes the solenoid valve tongue to overcome the elastic force of the return spring and move. Then, the movement of the solenoid valve tongue drives the connecting rod to rotate, causing the end of the connecting rod connected to the connecting rod to rotate away from the edge of the door panel. This causes the sealing plate assembly to fit into the gap between the door panel and the front wall, thereby sealing the gap between the door panel and the front wall during elevator operation. This prevents noise from entering the car during elevator operation, thereby improving passenger comfort.

[0057] When the elevator stops running, after the car comes to a complete stop, the solenoid valve body is de-energized. Through the elastic action of the return spring, the valve stem extends, which causes the solenoid valve tongue to move and return to its original position. This causes the solenoid valve tongue to drive the connecting rod to rotate, causing the end of the connecting rod connected to the connecting rod to rotate towards the edge of the door panel. This moves the sealing plate assembly away from the door panel, thus preventing friction between the sealing plate assembly and the front wall during the opening of the door panel.

[0058] When an elevator malfunctions, the solenoid valve body is de-energized. Through the elastic action of the return spring, the valve stem extends, causing the solenoid valve tongue to move and reset. This causes the solenoid valve tongue to drive the connecting rod to rotate, causing the end of the connecting rod to rotate towards the edge of the door panel. This moves the sealing plate assembly away from the door panel, ensuring adequate airflow inside the car.

[0059] The present invention has the following technical effects:

[0060] (1) The present invention can effectively block noise in the shaft from entering the car through the gap between the door panel and the front wall. The effect is more significant for high-speed or ultra-high-speed elevators, making the user experience better.

[0061] (2) By reducing the air circulation between the car and the shaft during elevator operation, this invention alleviates the discomfort caused to passengers by air pressure difference and improves the comfort of elevator ride.

[0062] (3) By using the present invention, the gap between the front wall and the door panel can be appropriately increased, thereby avoiding the noise caused by friction between the door panel and the front wall;

[0063] (4) When the device is powered on, the valve rod retracts and when the power is cut off, the valve rod extends, which can effectively ensure that the elevator car has a gap that meets the standard ventilation requirements when people are trapped due to power failure or other malfunctions.

[0064] Example 2: Refer to Figures 7 to 9As shown, this embodiment is similar in structure to Embodiment 1, except that the structure of the driving device is different. The specific structure is as follows:

[0065] The drive unit includes a guide rod 51 arranged along the width of the door panel and a thrust spring 52 sleeved on the guide rod. One end of the guide rod is rotatably connected to the end of the connecting rod away from the connecting rod, and the other end of the guide rod abuts against the edge of the door panel away from the sealing plate assembly. A magnet 53 is provided at the end of the guide rod away from the sealing plate assembly. A fixing ring 511 is fixedly arranged in the circumferential direction of the guide rod, and an abutment ring 13 is fixedly arranged on the door panel. The guide rod passes through the abutment ring, and the thrust spring abuts between the fixing ring and the abutment ring. When the car's entrance and exit are closed, the two door panels fit together, the positions of the two magnets on the two door panels correspond, and the magnetic poles on the facing surfaces of the magnets on the two door panels are the same.

[0066] In addition, in this embodiment, the end of the transmission rod away from the sealing plate assembly is provided with several parallel taps 54, and the taps are also provided with magnets. In this embodiment, there are two taps, which are symmetrically arranged on both sides of the transmission rod, and the ends of the taps are provided with magnets.

[0067] In this embodiment, when the car entrance / exit is opened, the thrust spring pushes the fixing ring, causing the transmission rod to move. This causes the transmission rod to drive the connecting rod to rotate, causing the end of the connecting rod near the connecting rod to move towards the edge of the door panel. This causes the sealing plate assembly to move away from the edge of the door panel, thereby opening the gap between the door panel and the front wall.

[0068] When the elevator car entrance and exit are closed, the two door panels come together, causing the magnets on the two door panels to come into contact. Since the magnetic poles are the same, the magnets on the two door panels move away from each other, which in turn causes the transmission rods on the two door panels to move away from each other. This causes the transmission rods to move, which in turn causes the connecting rods at their ends to rotate. This causes the connecting rods to rotate away from the edge of the door panel, allowing the sealing plate assembly to fit into the gap between the door panel and the front wall. This prevents noise from the elevator during operation from entering the car, thereby improving passenger comfort.

[0069] By setting a tap, the pushing force of the magnet-driven transmission rod can be increased, enabling the sealing plate assembly to abut against the gap between the front wall and the door panel more quickly and stably.

[0070] Example 3: This example is similar in structure to Example 2, except that, in order to increase ventilation inside the car when the elevator stops running due to a malfunction, a fixing sleeve 14 is fixedly installed on the door panel. The side wall of the fixing sleeve is provided with a through hole 141, and a plug 142 is provided in the through hole to seal it.

[0071] The conductive rod is configured to include a first conductive rod 512 and a second conductive rod 513;

[0072] One end of the first transmission rod is rotatably connected to the connecting rod, and the other end of the first transmission rod is set inside the fixed sleeve;

[0073] A magnet is provided at one end of the second transmission rod, and the other end of the second transmission rod is located inside the fixed sleeve;

[0074] The fixed sleeve contains several abutting balls 55 that abut against each other. The abutting balls form an abutting ball group, and the two ends of the abutting ball group abut against the first guide rod and the second guide rod, respectively.

[0075] With the above configuration, when the elevator stops running due to a malfunction, the plug can be removed, allowing the abutment ball inside the fixed sleeve to be removed through the perforation. This allows the thrust spring to push the first transmission rod to move, causing the transmission rod to drive the connecting rod to rotate. This causes the end of the connecting rod near the connecting rod to move towards the edge of the door panel, thereby moving the sealing plate assembly away from the edge of the door panel and opening the gap between the door panel and the front wall, thus ensuring ventilation inside the car.

[0076] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Other variations and modifications may be made without departing from the technical solutions described in the claims.

Claims

1. A noise reduction device for car doors, characterized in that, include: A sealing plate assembly is installed at the edge of the door panel, and a driving device drives the sealing plate assembly to or away from the edge of the door panel. The driving device and the sealing plate assembly are connected by a transmission device. The transmission device includes a connecting rod and a connecting rod. A pivot point is provided on the connecting rod. One end of the connecting rod is rotatably connected to the end of the connecting rod, and the other end of the connecting rod is rotatably connected to the sealing plate assembly. The driving device includes an electromagnetic valve body fixedly installed on the inner side of the door panel edge. A valve stem is installed inside the electromagnetic valve body, and an electromagnetic valve tongue is provided at the end of the valve stem. The electromagnetic valve tongue is rotatably connected to the end of the connecting rod. A return spring is sleeved on the valve stem, and the return spring abuts against the electromagnetic valve body and the valve tongue. The driving device is rotatably connected to the end of the connecting rod away from the connecting rod. The drive unit drives the connecting rod to rotate around the pivot point. The sealing plate assembly is equipped with a guide slide rod connected to it. The side wall of the door panel edge is equipped with a guide block, and the guide block is equipped with a guide hole. The guide slide rod passes through the guide hole. The edge of the door panel is equipped with a front wall parallel to it. The guide hole is inclined in the direction away from the front wall. When an elevator malfunction occurs, the solenoid valve body is de-energized. Through the elastic action of the return spring, the valve rod extends, the solenoid valve tongue moves, the solenoid valve tongue resets, and the solenoid valve tongue drives the connecting rod to rotate. The end of the connecting rod rotates towards the edge of the door panel, the sealing plate assembly moves away from the door panel, and the interior of the car can fully ensure air circulation.

2. The car door noise reduction device according to claim 1, characterized in that, The transmission device is provided in two sets, which are symmetrically arranged on both sides of the drive device.

3. The car door noise reduction device according to claim 1, characterized in that, The sealing panel assembly includes a fixed plate and a sound insulation layer disposed on the fixed plate.

4. The car door noise reduction device according to claim 3, characterized in that, The sound insulation layer is placed on the side closest to the fixed panel and the door panel.

5. A noise reduction device for car doors, characterized in that, include: A sealing plate assembly is installed at the edge of the door panel, and a driving device drives the sealing plate assembly to or away from the edge of the door panel. The driving device and the sealing plate assembly are connected by a transmission device. The transmission device includes a connecting rod and a connecting rod. A pivot point is provided on the connecting rod. One end of the connecting rod is rotatably connected to the end of the connecting rod, and the other end of the connecting rod is rotatably connected to the sealing plate assembly. The driving device includes a guide rod arranged along the width direction of the door panel and a thrust spring sleeved on the guide rod. One end of the guide rod is rotatably connected to the end of the connecting rod away from the connecting rod, and the other end of the guide rod abuts against the side of the door panel away from the sealing plate assembly. A magnet is provided at the end of the guide rod away from the sealing plate assembly. A fixing ring is fixedly provided in the circumferential direction of the guide rod, and an abutting ring is fixedly provided on the door panel. The guide rod passes through the abutting ring, and the thrust spring abuts between the fixing ring and the abutting spring. The driving device is rotatably connected to the end of the connecting rod away from the connecting rod. The driving device drives the connecting rod to rotate around... The rotating fulcrum rotates, and the sealing plate assembly is equipped with a guide slide rod connected to it. A guide block is provided on the side wall of the door panel edge, and a guide hole is provided in the guide block. The guide slide rod passes through the guide hole. A front wall is provided on the edge of the door panel parallel to it, and the guide hole is inclined in the direction away from the front wall. A fixing sleeve is fixedly installed on the door panel, and a through hole is provided on the side wall of the fixing sleeve. A plug is provided in the through hole to seal it. The transmission rod includes a first transmission rod, one end of which is rotatably connected to the connecting rod, and the other end of the first transmission rod is set in the fixing sleeve. When the elevator stops running due to a malfunction, the plug is removed, the abutment ball in the fixing sleeve is removed through the through hole, the thrust spring pushes the first transmission rod to move, the transmission rod drives the connecting rod to rotate, and the end of the connecting rod near the connecting rod moves towards the edge of the door panel. The sealing plate assembly moves away from the edge of the door panel, opening the gap between the door panel and the front wall to ensure ventilation inside the car.

6. The car door noise reduction device according to claim 5, characterized in that, The transmission rod includes a second transmission rod; A magnet is provided at one end of the second transmission rod, and the other end of the second transmission rod is located inside the fixed sleeve; The fixed sleeve contains several abutting balls that abut against each other. These abutting balls form an abutting ball group, and the two ends of the abutting ball group abut against the first guide rod and the second guide rod, respectively.

7. The car door noise reduction device according to claim 5, characterized in that, The end of the guide rod away from the sealing plate assembly has several parallel taps.

8. The car door noise reduction device according to claim 7, characterized in that, A magnet is installed at the end of the tap.

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