Anti-pinch device for rail transit vehicle door

Abstract

The invention relates to the technical field of rail transit protection, and discloses an anti-pinch device for a rail transit vehicle door, which comprises a vehicle wall and a multi-stage electric push rod, and two power inner cavities distributed in axial symmetry are formed in two opposite side edges in the vehicle wall; two multi-stage electric push rods which are symmetrically distributed in a horizontal axis are arranged in each of the two power inner cavities, the multi-stage electric push rods are correspondingly and fixedly connected with the inner walls of the power inner cavities, and the anti-pinch car door assemblies are correspondingly arranged in the car wall and are connected with the interior of the car wall in a rolling fit mode. The anti-pinch device for the rail transit vehicle door is simple in structure, and the riding anti-pinch safety is greatly improved through double protection of the infrared induction technology and the pressure detection technology.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit protection, and specifically to an anti-pinch device for the doors of rail transit vehicles. Background Technique

[0002] At present, with the rapid development of urban rail transit, the safety of transportation tools such as subways and light rails has attracted much attention. As the necessary passage for passengers to get on and off the vehicle, the anti-pinch function of the door is the key line of defense to ensure the safety of passengers. However, there are many deficiencies in the traditional anti-pinch devices for the doors of rail transit vehicles. Some devices use a single infrared induction technology. In complex environments such as strong light and dust, the infrared signal is easily interfered, resulting in misjudgment or missed detection, and the object being pinched cannot be detected in time. And the anti-pinch devices relying on single pressure detection have low detection sensitivity for light and flexible objects, and it is easy to miss the best anti-pinch opportunity, thus causing accidents of pinching people and objects. In addition, most of the door structure designs fail to effectively solve the problem of moving friction, and the frequent opening and closing cause serious wear of the doors and related components, which not only increases the maintenance cost but also poses a safety hazard. For this reason, we have proposed an anti-pinch device for the doors of rail transit vehicles. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] Aiming at the deficiencies of the existing technology, the present invention provides an anti-pinch device for the doors of rail transit vehicles, which solves the above problems.

[0005] (2) Technical Solutions

[0006] To achieve the above object, the present invention provides the following technical solutions: An anti-pinch device for the doors of rail transit vehicles, comprising:

[0007] A vehicle wall and multi-stage electric push rods. Two axially symmetrically distributed power cavities are opened on two opposite sides inside the vehicle wall. Two horizontally axially symmetrically distributed multi-stage electric push rods are provided inside each of the two power cavities, and the multi-stage electric push rods are fixedly connected to the inner walls of the power cavities correspondingly;

[0008] An anti-pinch door assembly. The anti-pinch door assembly is correspondingly placed inside the vehicle wall, and the anti-pinch door assembly is in rolling fit with the inside of the vehicle wall, and the anti-pinch door assembly is welded to the output shaft end of the multi-stage electric push rod correspondingly.

[0009] Preferably, two axially symmetrically distributed chutes are opened inside the vehicle wall, and both ends of the chutes penetrate into the inside of the power cavity correspondingly. An infrared induction device is provided at the middle position of the chute, and three laser detection transceivers are provided at equal distances on the end face of the infrared induction device.

[0010] Preferably, the anti-pinch door assembly includes a door body, rollers and rubber anti-pinch parts, and the main body of the anti-pinch door assembly is the door body, and the side wall of the door body is provided with two axially symmetrically distributed rubber anti-pinch parts, and the door body is respectively provided with two axially symmetrically distributed rollers on the two opposite axial ends corresponding to the rubber anti-pinch parts.

[0011] Preferably, the side wall of the vehicle door body is provided with two pressure detection grooves which are axially symmetrically distributed, a pressure sensor is provided inside the pressure detection groove, a laser detection groove is provided between the two pressure detection grooves, and connecting grooves are provided at both axial ends of the pressure detection grooves, and two rectangular rolling cavities which are axially symmetrically distributed are provided on one side of the vehicle door body corresponding to the connecting groove, connecting holes are provided on two opposite inner walls inside the rectangular rolling cavity, the rollers are correspondingly placed inside the rectangular rolling cavity, and the two opposite axial ends of the rollers are correspondingly rotatably connected with the connecting holes.

[0012] Preferably, the outer side of the door body facing away from the pressure detection groove is correspondingly placed inside the power inner cavity, and the side wall is correspondingly welded to the output shaft end of the multi-stage electric push rod.

[0013] Preferably, the side wall of the rubber anti-clamp component is provided with a pressing strip, which is inserted into the interior and corresponds to the pressure sensor. The two opposite axial ends of the pressing strip are provided with connecting blocks, which are connected to the connecting groove through an adapter screw.

[0014] Preferably, the roller is connected to the inside of the slide groove in a rolling manner.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the present invention provides an anti-pinch device for rail transit vehicle doors, which has the following beneficial effects:

[0017] The anti-pinch device for rail transit vehicle doors has multiple protection effects and adopts a dual anti-pinch mechanism of infrared sensing and pressure detection. The laser detection transceiver of the infrared sensing device can detect obstacles in time during the door closing process with a large detection span, and achieve rapid anti-pinch response. The pressure sensor serves as a backup protection and plays a role when the infrared sensing fails, avoiding accidents of people or objects being pinched due to failure of a single detection method, greatly improving the reliability and safety of door anti-pinch. At the same time, the setting of the roller effectively reduces the friction of door movement, reduces the wear of doors and related components, extends the service life of doors, reduces maintenance costs, and provides a strong guarantee for the safe and stable operation of rail transit vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional schematic diagram of an anti-pinch device for a rail transit vehicle door of the present invention;

[0019] Figure 2Schematic cross-sectional view of the vehicle wall of the present invention;

[0020] Figure 3 Schematic explosion structure diagram of the anti-pinch door assembly of the present invention;

[0021] Figure 4 Schematic cross-sectional view of the door body of the present invention;

[0022] Figure 5 Schematic diagram of the rubber anti-pinch member of the present invention.

[0023] In the figure: 1, vehicle wall; 2, door body; 3, multi-stage electric push rod; 4, roller; 5, rubber anti-pinch member; 6, chute; 7, infrared sensing device; 8, laser detection transceiver; 9, power inner cavity; 10, rectangular rolling cavity; 11, connection hole; 12, pressure detection groove; 13, connection groove; 14, laser detection groove; 15, pressure sensor; 16, connection block; 17, pressing strip. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-5 , an anti-pinch device for the doors of rail transit vehicles, including:

[0026] The vehicle wall 1 and the multi-stage electric push rod 3. Two axially symmetrically distributed power inner cavities 9 are opened on two opposite side edges inside the vehicle wall 1. Two horizontally axially symmetrically distributed multi-stage electric push rods 3 are provided inside each of the two power inner cavities 9, and the multi-stage electric push rods 3 are fixedly connected to the inner walls of the power inner cavities 9 correspondingly;

[0027] The anti-pinch door assembly is correspondingly placed inside the vehicle wall 1, and the anti-pinch door assembly is in rolling fit connection with the inside of the vehicle wall 1, and the anti-pinch door assembly is welded to the output shaft end of the multi-stage electric push rod 3 correspondingly.

[0028] Furthermore, two axially symmetrically distributed chutes 6 are opened inside the vehicle wall 1, and both ends of the chutes 6 penetrate into the power inner cavities 9 correspondingly. An infrared sensing device 7 is provided at the middle position of the chutes 6, and three equally spaced laser detection transceivers 8 are provided on the end face of the infrared sensing device 7. If an object blocks the infrared light emitted by the laser detection transceiver 8, the signal of the laser detection transceiver 8 on the other side changes, and the system will immediately determine that there is a situation of pinching a person or an object, thereby triggering the door to reopen. Moreover, the span of the laser detection transceiver 8 group is relatively large, effectively ensuring the detection range.

[0029] Furthermore, the anti-pinch door assembly includes a door body 2, rollers 4 and rubber anti-pinch parts 5, and the main body of the anti-pinch door assembly is the door body 2, and the side wall of the door body 2 is provided with two axially symmetrically distributed rubber anti-pinch parts 5, and the door body 2 is respectively provided with two axially symmetrically distributed rollers 4 on the two opposite axial ends corresponding to the rubber anti-pinch parts 5, and the anti-pinch door assembly is controlled by a multi-stage electric push rod 3 to push and close or retract and open.

[0030] Furthermore, two pressure detection grooves 12 are axially symmetrically distributed on the side wall of the door body 2, a pressure sensor 15 is provided inside the pressure detection groove 12, and a laser detection groove 14 is provided between the two pressure detection grooves 12, and connecting grooves 13 are provided at both axial ends of the pressure detection grooves 12. Two rectangular rolling cavities 10 are axially symmetrically distributed on one side of the door body 2 corresponding to the connecting groove 13, and connecting holes 11 are provided on two opposite inner walls of the rectangular rolling cavity 10. The roller 4 is correspondingly placed inside the rectangular rolling cavity 10, and the two opposite axial ends of the roller 4 are rotatably connected with the connecting holes 11. The laser detection grooves 14 of the two door bodies 2 effectively provide a detection space for the infrared sensing device 7, ensure the detection accuracy, and ensure the overall safety and anti-pinch performance. The pressure sensor 15 can play a second protection role when the infrared sensing device 7 fails.

[0031] Furthermore, the side of the door body 2 facing away from the pressure detection groove 12 is correspondingly placed inside the power inner cavity 9, and the side wall is correspondingly welded to the output shaft end of the multi-stage electric push rod 3.

[0032] Furthermore, a pressing strip 17 is provided on the side wall of the rubber anti-pinch component 5, and the pressing strip 17 is inserted into the interior and corresponds to the pressure sensor 15. Connecting blocks 16 are provided at both opposite axial ends of the pressing strip 17, and the connecting blocks 16 are connected to the connecting grooves 13 through adapter screws. When the infrared sensing device 7 fails unexpectedly, if the anti-pinch door assembly clamps the passenger, the rubber anti-pinch component 5 is compressed and deformed, so that the pressing strip 17 is squeezed and fitted with the pressure sensor 15, and the signal is transmitted to the control system to control the multi-stage electric push rod 3 to open the two anti-pinch door assemblies.

[0033] Furthermore, the roller 4 is connected to the inside of the slide groove 6 by rolling cooperation, and the roller 4 reduces the movement friction between the rubber anti-clamping part 5 and the vehicle wall 1, so that the overall opening and closing is smooth.

[0034] Structure Description:

[0035] Car wall 1: Car wall 1 is the basic bearing structure of the anti-pinch device for rail transit vehicle doors, and two opposite sides thereof are provided with a power inner cavity 9 and a slide groove 6 which are axially symmetrically distributed, providing installation space and a motion track for other components;

[0036] Door body 2: The door body 2 is the main body of the anti-pinch door assembly. The side wall is provided with a rubber anti-pinch member 5 and a pressure detection groove 12, which are correspondingly connected to the multi-stage electric push rod 3 and drive the opening and closing of the door under its drive;

[0037] Multi-stage electric push rod 3: The multi-stage electric push rod 3 is fixed on the inner wall of the power cavity 9 and serves as the driving source for the movement of the door. It is welded to the door body 2 through the output shaft end to control the anti-pinch door assembly to push and close or retract and open;

[0038] Roller 4: The roller 4 is placed in the rectangular rolling cavity 10 of the door body 2. The two shaft ends are rotationally matched with the connection holes 11 and are in rolling connection with the chute 6, which can reduce the moving friction of the door and ensure the smooth opening and closing of the door;

[0039] Rubber anti-pinch member 5: The rubber anti-pinch member 5 is symmetrically arranged on the side wall of the door body 2. The pressing strip 17 on the side wall corresponds to the pressure sensor 15 and triggers pressure detection when being squeezed and deformed. It is an important induction component for anti-pinching;

[0040] Chute 6: The chute 6 is axially symmetrically distributed in the vehicle wall 1, penetrates into the power cavity 9 at both ends, and an infrared induction device 7 is installed in the middle to provide a rolling track for the roller 4 and assist in realizing the smooth movement of the door;

[0041] Infrared induction device 7: The infrared induction device 7 is installed in the middle position of the chute 6, and three equally spaced laser detection transceivers 8 are arranged on the end face to detect obstacles on the closing path of the door through infrared light;

[0042] Laser detection transceiver 8: The laser detection transceiver 8 is the core component of the infrared induction device 7. Multiple are equally spaced. By emitting and receiving infrared light, it detects whether there is an object blocking and triggers the door anti-pinch mechanism;

[0043] Power cavity 9: The power cavity 9 is symmetrically opened inside the vehicle wall 1 to provide an installation space for the multi-stage electric push rod 3. It is the integrated area of the door opening and closing power system to ensure the normal operation of the driving components;

[0044] Rectangular rolling cavity 10: The rectangular rolling cavity 10 is opened on the door body 2, and connection holes 11 are provided on the inner opposite walls for installing the roller 4 to provide space for the roller to rotate and assist the smooth movement of the door;

[0045] Connection hole 11: The connection hole 11 is located on the inner wall of the rectangular rolling cavity 10 and cooperates with the two shaft ends of the roller 4 to realize the rotational connection of the roller in the rectangular rolling cavity and ensure the flexibility of the roller when the door moves;

[0046] Pressure detection groove 12: The pressure detection groove 12 is symmetrically distributed on the side wall of the door body 2, and a pressure sensor 15 is installed inside to cooperate with the rubber anti-pinch member 5 to perform pressure detection for anti-pinching when the infrared induction fails;

[0047] Connecting groove 13: The connecting groove 13 is opened at the shaft end of the pressure detection groove 12 and is used to connect the connecting block 16 of the rubber anti-pinch member 5 to ensure the stable connection between the rubber anti-pinch member and the vehicle door body and the pressure conduction;

[0048] Laser detection groove 14: The laser detection groove 14 is located between the two pressure detection grooves 12 and provides a detection channel for the laser detection transceiver of the infrared induction device to ensure the accuracy of infrared detection;

[0049] Pressure sensor 15: The pressure sensor 15 is installed in the pressure detection groove 12 and corresponds to the pressing strip 17 of the rubber anti-pinch member. When being squeezed, it transmits a signal and serves as the second layer of protection against pinching;

[0050] Connecting block 16: The connecting block 16 is arranged at both ends of the pressing strip 17 and is connected to the connecting groove 13 of the vehicle door body 2 through an adapter screw. While fixing the rubber anti-pinch member, it ensures that the pressure is transmitted to the pressure sensor;

[0051] Pressing strip 17: The pressing strip 17 is located on the side wall of the rubber anti-pinch member 5, inserts into the interior of the vehicle door body and corresponds to the pressure sensor 15. When the rubber anti-pinch member is deformed under pressure, it squeezes the sensor to trigger the anti-pinch operation.

[0052] Working principle: Install the anti-pinch device for the vehicle door of rail transit vehicles correctly according to the schematic diagram. The anti-pinch device works in coordination through various detection methods to achieve reliable anti-pinching. When the vehicle door of rail transit vehicles is about to close, the multi-stage electric push rod 3 starts, pushing the vehicle door body 2 in the anti-pinch door assembly to move along the sliding groove 6 in the vehicle wall 1. During the closing process of the vehicle door, the infrared induction device 7 at the middle position of the sliding groove 6 and the three laser detection transceivers 8 evenly distributed on its end face start to work. The laser detection transceiver 8 emits infrared light. If an object blocks the light, the signal received by the laser detection transceiver 8 on the other side changes, and the system immediately determines that there is a situation of pinching a person or an object, and then controls the multi-stage electric push rod 3 to move in the reverse direction to open the vehicle door again. At the same time, the pressure sensor 15 in the pressure detection groove 12 on the side wall of the vehicle door body 2 is also in a monitoring state. The pressing strip 17 on the side wall of the rubber anti-pinch member 5 on the vehicle door body 2 corresponds to the pressure sensor 15. When the infrared induction device 7 fails accidentally and the vehicle door pinches an object, the rubber anti-pinch member 5 is squeezed and deformed, the pressing strip 17 is squeezed and fitted with the pressure sensor 15, and the pressure sensor 15 transmits the signal to the control system. The control system controls the multi-stage electric push rod 3 to open the vehicle door. In addition, the laser detection grooves 14 of the two vehicle door bodies 2 provide a detection space for the infrared induction device 7 to ensure the accuracy of infrared detection; The roller 4 is in rolling cooperation with the sliding groove 6 to reduce the friction when the vehicle door moves, making the opening and closing of the vehicle door more smooth and ensuring the smooth progress of the entire anti-pinch process.

[0053] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-pinch device for the doors of rail transit vehicles, characterized in that: Including: A vehicle wall (1) and multi-stage electric push rods (3). Two relatively opposite side edges inside the vehicle wall (1) are provided with two power inner cavities (9) distributed axially symmetrically. Inside each of the two power inner cavities (9), there are two multi-stage electric push rods (3) distributed axially symmetrically horizontally, and the multi-stage electric push rods (3) are fixedly connected to the inner walls of the power inner cavities (9) correspondingly. An anti-pinch door assembly. The anti-pinch door assembly is correspondingly arranged inside the vehicle wall (1), and the anti-pinch door assembly is in rolling fit connection with the inside of the vehicle wall (1), and the anti-pinch door assembly is welded to the output shaft end of the multi-stage electric push rod (3) correspondingly.

2. The anti-pinch device for the door of a rail transit vehicle according to claim 1, characterized in that: Two axially symmetrically distributed chutes (6) are provided inside the vehicle wall (1), and both ends of the chutes (6) penetrate into the power inner cavities (9) correspondingly. An infrared sensing device (7) is arranged at the middle position of the chute (6), and three laser detection transceivers (8) are arranged at equal distances on the end face of the infrared sensing device (7).

3. The anti-pinch device for the door of a rail transit vehicle according to claim 1, characterized in that: The anti-pinch door assembly includes a door body (2), rollers (4) and rubber anti-pinch members (5). The main body of the anti-pinch door assembly is the door body (2). Two axially symmetrically distributed rubber anti-pinch members (5) are provided on the side wall of the door body (2), and two axially symmetrically distributed rollers (4) are respectively arranged on the two relatively opposite axial end sides of the door body (2) corresponding to the rubber anti-pinch members (5).

4. The anti-pinch device for the door of a rail transit vehicle according to claim 3, characterized in that: Two axially symmetrically distributed pressure detection grooves (12) are provided on the side wall of the door body (2). A pressure sensor (15) is arranged inside the pressure detection grooves (12). A laser detection groove (14) is provided between the two pressure detection grooves (12). Connection grooves (13) are provided at both axial ends of the pressure detection grooves (12). Two axially symmetrically distributed rectangular rolling cavities (10) are provided on one side of the door body (2) corresponding to the connection grooves (13). Connection holes (11) are provided on the two relatively opposite inner walls inside the rectangular rolling cavities (10). The rollers (4) are correspondingly arranged inside the rectangular rolling cavities (10), and the two relatively opposite axial ends of the rollers (4) are in rotational fit connection with the connection holes (11) correspondingly.

5. The anti-pinch device for the door of a rail transit vehicle according to claim 4, characterized in that: The side of the door body (2) facing away from the pressure detection grooves (12) outside is correspondingly arranged inside the power inner cavity (9), and this side wall is welded to the output shaft end of the multi-stage electric push rod (3) correspondingly.

6. The anti-pinch device for the door of a rail transit vehicle according to claim 3, wherein: A pressing strip (17) is provided on the side wall of the rubber anti-pinch member (5). The pressing strip (17) is correspondingly inserted inside, and the pressing strip (17) corresponds to the pressure sensor (15). Connection blocks (16) are provided at both relatively opposite axial ends of the pressing strip (17). The connection blocks (16) are connected to the connection grooves (13) through matching screws.

7. The anti-pinch device for the door of a rail transit vehicle according to claim 4, characterized in that: The rollers (4) are in rolling fit connection with the inside of the chutes (6) correspondingly.

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