Emergency unlocking device for sliding plug door and unlocking door opening device

Abstract

The utility model discloses an emergency unlocking device and an unlocking door opener for a sliding plug door, the emergency unlocking device comprises an unlocking cylinder used for driving an unlocking plate to slide, a spring is sleeved outside a piston rod of the unlocking cylinder, and a rod cavity of the unlocking cylinder is connected with a reversing valve used for switching gas circuits. When an emergency occurs in the vehicle, the reversing valve switches the air path, the rod cavity of the unlocking air cylinder loses air, and the piston rod loses limitation, the unlocking air cylinder extends out under the action of the spring to drive the unlocking plate of the unlocking device to slide, and one-key automatic unlocking is achieved.

Description

Technical Field

[0001] The utility model relates to an emergency unlocking device for a plug sliding door and also to an emergency unlocking and opening device for a plug sliding door, belonging to the field of transportation. Background Art

[0002] In the prior art, the driving device that drives the sliding plug door to slide will continue to deflect a certain angle after the door is closed, so that the door is locked to ensure driving safety. When the door is opened, the driving device is unlocked in advance, and then the door can be driven to slide and open. However, when an emergency occurs in the vehicle, the driving device fails, and the door needs to be manually unlocked and opened. For example, the invention patent application with publication number CN 112983182 A discloses a plug door bearing drive mechanism for urban rail vehicles. The manual unlocking device cannot meet the requirement of quickly evacuating passengers from the vehicle in critical moments. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to provide an emergency unlocking device for a Sierra door that can be unlocked quickly. Another purpose of the utility model is to provide an emergency opening device for a Sierra door that can open the door with one click in an emergency.

[0004] Technical solution: The utility model discloses an emergency unlocking device for a plug door, comprising an unlocking cylinder for driving an unlocking plate to slide, a spring for driving the piston rod to extend is arranged outside the piston rod of the unlocking cylinder, and a reversing valve for switching the air circuit is connected to the rod chamber of the unlocking cylinder.

[0005] When the vehicle is operating normally, the rod chamber of the unlocking cylinder is connected to the vehicle's normal air source through the reversing valve, and the piston rod is restricted and retracted. When the vehicle encounters an emergency, the reversing valve switches the air path, the rod chamber of the unlocking cylinder loses air, and the piston rod loses its restriction and extends out under the action of the spring, thereby driving the unlocking plate of the unlocking device to slide, achieving one-button automatic unlocking.

[0006] Preferably, in order to facilitate the installation of the unlocking cylinder and avoid affecting the normal operation of the door leaf, the front end of the piston rod of the unlocking cylinder is provided with an unlocking flap for lifting the unlocking plate, the unlocking flap is L-shaped, and a support for supporting the rotation of the unlocking flap is provided at the middle corner of the unlocking flap. The unlocking flap is arranged so that the unlocking cylinder can be installed on the top of the door leaf.

[0007] Preferably, a mounting seat for supporting a cylinder body of the unlocking cylinder is provided outside the unlocking cylinder.

[0008] Preferably, a side arm of the unlocking flap away from the piston rod is provided with a mounting hole for connecting with the unlocking plate.

[0009] Preferably, a side arm of the unlocking flap away from the piston rod is provided with a steel rope for connecting to the unlocking plate.

[0010] A plug door emergency unlocking and opening device comprises the unlocking device of the aforementioned part and a door opening cylinder, wherein the door opening cylinder has a rodless chamber and is connected to a reversing valve.

[0011] When the vehicle is operating normally, the rod chamber of the unlocking cylinder is connected to the vehicle's normal air source through the reversing valve, and the rodless chamber of the door opening cylinder has no gas supply; in an emergency, the reversing valve automatically switches the air circuit to connect the normal air source with the rodless chamber of the door opening cylinder, the rod chamber of the unlocking cylinder loses air, the door leaf is unlocked, and the air piston rod of the door opening cylinder extends to push the door leaf open. The door can be unlocked and opened by replacing the air circuit with one button.

[0012] Preferably, in order to ensure that the piston rod of the door opening cylinder is retracted under normal circumstances, the rod chamber of the door opening cylinder and the rod chamber of the unlocking cylinder are connected through a three-way valve and a reversing valve.

[0013] Preferably, in order to ensure that the rod chamber of the unlocking cylinder is filled with gas before the rod chamber of the door opening cylinder, and to ensure that the piston rod of the unlocking cylinder extends before the piston rod of the door opening cylinder, the length of the piston rod of the unlocking cylinder is shorter than the length of the piston rod of the door opening cylinder.

[0014] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. One-touch unlocking, easy to operate; 2. Small size, the unlocking device and the door leaf work normally without interfering with each other; 3. Simple structure, easy to install; 4. One-touch unlocking and door opening in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model in use state.

[0017] Figure 3 It is a schematic diagram of the connection relationship of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0019] Embodiment 1: In the prior art, a double-opening plug sliding door is mainly maintained in operation by a bearing drive mechanism, which includes a frame 1, an intermediate unlocking assembly 2, a left door leaf bearing assembly 3 and a right door leaf bearing assembly 4. The left door leaf bearing assembly and the right door leaf bearing assembly are symmetrically arranged and have the same structure. The left door leaf bearing assembly and the right door leaf bearing assembly both include mutually parallel screw rods and guide columns. The screw thread directions of the left and right door leaf bearing assemblies are opposite, and the guide columns are all smooth rods. A movable sleeve 32 and a slide cylinder are respectively mounted on the screw rod and the guide column. A connecting structure is also mounted on the outside of the movable sleeve 32 and the slide cylinder, which will not be repeated here. The movable sleeve 32 and the slide cylinder are connected by a bent connecting piece 34. The two ends of the bent connecting piece 34 are respectively hinged to the movable sleeve 32 and the slide cylinder. The output end of the motor is connected to the screw rod to drive the movable sleeve 32 to move along the axis of the screw rod. The slide cylinder slides along the axis of the guide column according to the movable sleeve 32 to drive the door leaves to move relatively close or away.

[0020] When the door leaf is closed, that is, when the movable sleeve 32 moves to the inner top of the screw rod and the slide moves to the inner top of the guide post, the movable sleeve 32 also rotates a certain angle with the screw rod and makes the guide post approach the screw rod through the bent connector 34 to complete the locking; when the door leaf needs to be opened, the movable sleeve 32 is manually pushed to reverse first to restore the distance between the screw rod and the guide post to release the lock. The intermediate unlocking component 2 is used to complete the unlocking work of pushing the movable sleeve 32 to reverse, mainly including an unlocking plate 25, which is slidably connected to the frame 1 between the two opposite movable sleeves 32, pushes the unlocking plate 25 to slide and push, and at the same time pushes the two movable sleeves 32 to flip to complete the unlocking.

[0021] On this basis, the utility model discloses an emergency unlocking device for a plug sliding door, the unlocking device mainly consists of an unlocking cylinder 5, the piston rod 51 of the unlocking cylinder 5 pushes the unlocking plate 25 to slide to unlock the door leaf, the piston rod 51 of the unlocking cylinder 5 is provided with a spring 52, the rod cavity air pipe 53 of the unlocking cylinder 5 is connected with a reversing valve 8, the reversing valve 8 is used to switch the air circuit in an emergency, so that the rod cavity of the unlocking cylinder 5 is cut off, and the rodless cavity of the unlocking cylinder 5 is not connected to the air pipe or air circuit. The reversing valve 8 has an air source interface P, an air circuit I interface A, an air circuit I exhaust port R1, an air circuit II interface B, an air circuit II exhaust port R2, and a reversing air circuit interface C for switching the connection relationship between P and A and B.

[0022] When the vehicle is operating normally, the unlocking cylinder 5 is connected to the vehicle's normal air source through the interface A and the interface P of the reversing valve 8, and the piston rod 51 is restricted and retracted; when the vehicle encounters an emergency, the air circuit control of the interface A and the interface P controlled by the controlled interface C is disconnected, and the gas in the rod cavity of the unlocking cylinder 5 is discharged through the exhaust port R1. The piston rod 51 loses its restriction and extends out under the driving action of the spring 52, driving the unlocking plate 25 to slide, realizing one-button automatic unlocking.

[0023] The cylinder body of the unlocking cylinder 5 is installed with the frame 1 through the mounting seat 54. The piston rod of the unlocking cylinder 5 can be arranged below the unlocking plate 25 of the unlocking device, and its piston rod 51 pushes the unlocking plate 25 to slide upward when the door is opened, or it can be installed above the unlocking plate 25, and the unlocking plate is slid by the unlocking flap 6. In order to facilitate the installation of the unlocking cylinder and avoid affecting the normal operation of the door leaf, the front end of the piston rod 51 of the unlocking cylinder is provided with an L-shaped unlocking flap 6 for lifting the unlocking plate 25, and the middle corner of the unlocking flap 6 is rotatably connected to the frame 1 through the support 61. When in use, the rod chamber of the unlocking cylinder 5 loses air, the piston rod 51 pushes one side arm of the unlocking flap 6 to rotate the unlocking flap 6, and the other side arm of the unlocking flap 6 lifts the unlocking plate 25, driving the unlocking plate to slide and unlock. The side arm of the unlocking flap 6 away from the piston rod 51 is provided with a mounting hole (not shown) for connecting with the unlocking plate, and the side arm of the unlocking flap 6 away from the piston rod 51 is connected to the unlocking plate through a steel rope 62.

[0024] Embodiment 2: Based on Embodiment 1, the unlocking device can also be added with a door opening device to achieve one-touch unlocking and quick door opening in an emergency. The device for opening the door is a door opening cylinder 7. The rodless cavity air pipe 71 of the door opening cylinder 7 is connected to the interface B of the reversing valve 8. When the vehicle is operating normally, interface B and the normal air source interface P are disconnected. When an emergency occurs in the vehicle, interface B and the air source interface P are connected (interface A and the air source interface P are disconnected), the piston rod 51 of the unlocking cylinder 5 extends out to unlock, and the piston rod of the door opening cylinder 7 also extends out to push the door leaf to open, achieving one-touch automatic unlocking and door opening. Since the door leaf bearing device is provided with a screw, the screw serves as a synchronization device for opening the door leaf, and one door opening cylinder 7 can drive two door leaves to open by pushing one door leaf to slide.

[0025] The rod chamber air pipe 72 of the door opening cylinder 7 and the rod chamber air pipe 53 of the unlocking cylinder are connected through the three-way valve 9 and the interface A of the reversing valve 8. Under normal circumstances, the piston rods of the door opening cylinder 7 and the unlocking cylinder 5 are both retracted.

[0026] In order to ensure that the piston rod of the unlocking cylinder 5 extends before the piston rod of the door opening cylinder 7, the length of the piston rod of the unlocking cylinder 5 needs to be smaller than the length of the piston rod of the door opening cylinder 7.

Claims

1. An emergency unlocking device for a plug door, characterized in that: The invention comprises an unlocking cylinder (5) for driving an unlocking plate to slide, a spring (52) being arranged on the outer surface of a piston rod (51) of the unlocking cylinder (5), the piston rod (51) of the unlocking cylinder (5) being arranged above the unlocking plate (25), an unlocking flap (6) for lifting the unlocking plate being arranged at the front end of the piston rod (51) of the unlocking cylinder (5), and a reversing valve (8) for switching an air path being connected to a rod cavity of the unlocking cylinder (5).

2. The plug door emergency unlocking device according to claim 1, characterized in that: The unlocking flap (6) is L-shaped, and a support (61) for supporting the unlocking flap (6) to rotate is provided at a central corner of the unlocking flap (6).

3. The plug door emergency unlocking device according to claim 1, characterized in that: The unlocking cylinder is provided with a mounting seat (54) outside to support the unlocking cylinder body.

4. The plug door emergency unlocking device according to claim 2, characterized in that: The side arm of the unlocking flap (6) away from the piston rod is provided with a mounting hole for connecting with the unlocking plate.

5. The plug door emergency unlocking device according to claim 2, characterized in that: The side arm of the unlocking flap (6) away from the piston rod is provided with a steel rope (62) for connecting with the unlocking plate.

6. A plug door emergency unlocking and opening device, characterized in that: It comprises the unlocking device as claimed in claim 1 and a door-opening cylinder (7), wherein the rodless chamber of the door-opening cylinder (7) is connected to a reversing valve (8).

7. The plug door emergency unlocking and opening device according to claim 6, characterized in that: The rod chamber of the door opening cylinder (7) and the rod chamber of the unlocking cylinder (5) are connected via a three-way valve (9) and a reversing valve (8).

8. The plug door emergency unlocking and opening device according to claim 6, characterized in that: The length of the piston rod of the unlocking cylinder (5) is shorter than the length of the piston rod of the door opening cylinder (7).

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