A test fixture for subway car door opening and closing

Abstract

This utility model discloses a test fixture for subway vehicle door opening and closing, relating to the field of rail transit vehicle maintenance. This subway vehicle door opening and closing test fixture, through innovative design of a dedicated test fixture, can accurately simulate the signals of the door control system, allowing for electric door opening and closing function testing after the door's mechanical adjustments are completed and before the side top plate is installed. This technical solution effectively solves the problems of inaccurate testing and high rework rates in traditional maintenance methods, enabling early verification of the door's electric function and significantly improving the quality and efficiency of overhaul operations. This test fixture can be widely used in the overhaul, major repair, and routine maintenance of subway, light rail, and other rail vehicle door systems, featuring high testing accuracy, convenient operation, and safety and reliability, and has significant practical value for improving the maintenance level of rail transit vehicles.

Description

Technical Field

[0001] This utility model relates to rail transit vehicle maintenance technology, specifically to a test fixture for the opening and closing of subway vehicle doors. Background Technology

[0002] The door system is a crucial interface between subway vehicles and the external environment, and its normal operation directly affects passenger safety and train operational efficiency. The door system not only needs to open and close frequently during daily operations but also needs to maintain stable operation under various environmental conditions (such as high temperature, low temperature, humidity, and vibration). Therefore, the maintenance and repair of the door system are of paramount importance.

[0003] In existing subway vehicle overhaul operations, the door system requires maintenance work such as size adjustments and replacement of mechanical components. Traditional maintenance methods have the following technical drawbacks: they rely on manual operation for door opening and closing tests, which can easily lead to misjudgments due to uneven force on the left and right door panels; they cannot verify the electric function before installing the side top panels and door pillar covers, and problems such as anti-pinch failures and collision noises often occur when the entire vehicle is powered on for debugging; after the side top panels are installed, the maintenance space is small, making rework difficult and seriously affecting maintenance efficiency.

[0004] It is evident that the maintenance of subway car door systems relies heavily on manual operation and experience-based judgment. After the door dimensions are adjusted, the opening and closing of the doors can usually only be performed manually, which cannot fully guarantee the functionality of the electric opening and closing system. This leads to problems such as anti-pinch issues, collisions, and abnormal noises during the commissioning phase, requiring the disassembly of the door pillar covers and side top panels for troubleshooting, increasing workload and potentially causing project delays.

[0005] To solve the aforementioned problems, it is necessary to develop a door opening and closing test fixture that is simple in structure, easy to operate, economical, practical, and portable. Utility Model Content

[0006] The purpose of this utility model is to provide a test fixture for the opening and closing of subway car doors, so as to solve the problem that the electric door opening and closing function cannot be fully guaranteed when the doors are inspected in the traditional way.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a test fixture for opening and closing subway car doors, comprising:

[0008] The control box consists of a box body, a first box cover, and a second box cover. The first box cover is sandwiched between the box body and the second box cover. The box body is provided with a handle.

[0009] There are multiple buttons, all of which are connected to the first box cover;

[0010] A circuit breaker is connected to the first box cover;

[0011] The connector is connected to the housing and is connected to the door LDCU, door MDCU and button respectively via wiring;

[0012] Terminal blocks are connected in the housing and are connected between the circuit breaker and the push button via wiring.

[0013] The contactor is connected in the housing and is connected to the terminal block, the door LDCU and the door MDCU respectively via wiring.

[0014] Preferably, the control box has a body size of 200mm×300mm×130mm, is made of polycarbonate material, has a waterproof rating of IP65, and the first box cover is made of stainless steel.

[0015] Preferably, the connector has 10 pins, a working current of 16A, a working voltage of 500V, and a working temperature of -40℃ to 125℃.

[0016] Preferably, the coil voltage of the contactor is DC77V-137V, and the contacts are 4 pairs of normally open contacts.

[0017] Preferably, the button has a rated voltage of DC110V, a rated current of 1A, and the contact material is selected from silver alloy and gold alloy.

[0018] Preferably, the circuit breaker has a current rating of 6A and a voltage rating of DC110V.

[0019] Compared with existing technologies, this utility model provides a subway vehicle door opening and closing test fixture. Through innovative design of a dedicated test fixture, it can accurately simulate the signals of the door control system, and perform electric door opening and closing function tests after the door mechanical adjustment is completed and before the side top plate is installed. This technical solution effectively solves the problems of inaccurate testing and high rework rate in traditional maintenance methods, realizes early verification of the electric door function, and significantly improves the quality and efficiency of overhaul operations.

[0020] This testing fixture can be widely used in the overhaul, major repair, and daily maintenance of door systems for subway, light rail, and other rail vehicles. It features high testing accuracy, convenient operation, and safety and reliability, and has significant practical value for improving the maintenance level of rail transit vehicles. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model. Figure 1 ;

[0023] Figure 2 A schematic diagram of the overall structure provided for an embodiment of this utility model. Figure 2 ;

[0024] Figure 3 A schematic diagram of the overall structure provided for an embodiment of this utility model. Figure 3 ;

[0025] Figure 4 A schematic diagram of the device circuit structure provided for an embodiment of this utility model;

[0026] Figure 5 A schematic diagram illustrating the conditions for allowing door opening during data collection, provided for embodiments of this utility model;

[0027] Figure 6 A schematic diagram illustrating the data acquisition conditions that allow the gate to close, as provided in this embodiment of the utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Enclosure; 2. First enclosure cover; 3. Second enclosure cover; 4. Handle; 5. Button; 6. Circuit breaker; 7. Connector; 8. Terminal block; 9. Contactor. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0031] As attached Figure 1 To be continued Figure 6 As shown:

[0032] Example:

[0033] This utility model provides a test fixture for the opening and closing of subway vehicle doors, comprising:

[0034] The control box consists of a box body 1, a first box cover 2, and a second box cover 3. The first box cover 2 is sandwiched between the box body 1 and the second box cover 3. The box body 1 is provided with a handle 4. The dimensions of the box body 1 of the control box are 200mm×300mm×130mm. It is made of polycarbonate material and has a waterproof rating of IP65. The first box cover 2 is made of stainless steel.

[0035] Button 5, multiple of which are connected to the first box cover 2, the rated voltage of button 5 is DC110V, the rated current is 1A, and the contact material is silver alloy and gold alloy.

[0036] Circuit breaker 6 is connected to the first box cover 2. The rated current of circuit breaker 6 is 6A and the rated voltage is DC110V.

[0037] The connector 7 is connected to the housing 1 and is connected to the door LDCU, door MDCU and button 5 respectively through wiring. The connector 7 has 10 pins, a working current of 16A, a working voltage of 500V and a working temperature of -40℃ to 125℃.

[0038] Terminal block 8 is connected in the housing 1 and is connected between the circuit breaker 6 and the button 5 via wiring.

[0039] Contactor 9 is connected in the housing 1 and is connected to terminal block 8, door LDCU and door MDCU respectively through wiring. The coil voltage of contactor 9 is DC77V-137V and the contacts are 4 pairs normally open.

[0040] During testing, wiring is used to connect the various structural components, and a DC regulated power supply is used to connect the circuit breaker and contactor 9, the door LDCU and door MDCU to power them.

[0041] By innovatively designing specialized testing fixtures, signals from the vehicle door control system can be accurately simulated, allowing for electric door opening and closing function testing immediately after mechanical adjustments of the door and before the installation of the side roof panel. This technical solution effectively solves the problems of inaccurate testing and high rework rates inherent in traditional maintenance methods, enabling early verification of the electric door function and significantly improving the quality and efficiency of overhaul operations.

[0042] This testing fixture can be widely used in the overhaul, major repair, and daily maintenance of door systems for subway, light rail, and other rail vehicles. It features high testing accuracy, convenient operation, and safety and reliability, and has significant practical value for improving the maintenance level of rail transit vehicles.

[0043] Tooling can be categorized based on its functionality as follows:

[0044] The signal simulation unit is used to generate door opening and closing control signals that conform to rail transit vehicle standards.

[0045] The logic verification module monitors the mechanical isolation status, emergency unlocking status, zero-speed signal, and door permission signal of the door system in real time.

[0046] Portable testing terminal, with an IP65-rated housing and standard electrical interfaces;

[0047] The safety interlock mechanism ensures that the drive power is automatically cut off when not in a test state.

[0048] The logic verification module is further divided into:

[0049] The first verification submodule is used to confirm the door opening conditions: mechanical isolation and emergency unlocking are not triggered, the door permission signal is valid, the zero speed signal is valid, and the door closing signal is invalid.

[0050] The second verification submodule is used to confirm the closing conditions: mechanical isolation and emergency unlocking are not triggered, and the zero-speed signal is valid.

[0051] The anomaly detection unit triggers a protection mechanism when it detects abnormal current or positional deviation.

[0052] The basic principle of this fixture is to collect door opening and closing conditions, and when the door opening and closing command is met, transmit it to the main door control unit (MDCU) to simulate the signals of the door control system, drive the door motor to perform door opening and closing operations, and test the electric door opening and closing function of the door. Specifically, the fixture sends control signals through the interface of the door control system to simulate the actual door opening and closing operation, ensuring that the door can operate normally after size adjustment.

[0053] The EDCU drive motor is only allowed to perform the door opening operation when the tooling meets the following conditions:

[0054] There was no mechanical isolation device in operation, and;

[0055] The emergency unlocking device was not activated, and;

[0056] The "gate allows trains to proceed" signal is high, and;

[0057] The "zero-speed train line" is at a high voltage level, and;

[0058] The "closed train line" is at a low level, and;

[0059] The door is in a non-fully opened position, and;

[0060] No fault occurred in the lock-in switch.

[0061] Collection of conditions for allowing door opening, such as Figure 5 As shown;

[0062] Allowed closing conditions: After receiving a valid closing command, the EDCU drive motor is only allowed to perform the closing operation when the tooling meets the following conditions:

[0063] There was no mechanical isolation device in operation, and;

[0064] The emergency unlocking device was not activated, and;

[0065] The "zero-speed train line" is at a high level, and...

[0066] Data collection allows for gate closure conditions such as Figure 6 As shown.

[0067] Operators use their equipment to check the indicator lights to ensure the door opening and closing control logic is met, as shown in the table below:

[0068] Doors allow train lines Zero-speed train line Door opening signal Door closing signal Door status x 1->0 x x close 1->0 1 0 0 Keep 0 1 x 0->1 close 0 1 0->1 x Keep 1 1 0 0 Keep 1 1 x 0->1 close 1 1 0->1 0 open 1 1 0->1 1 Keep

[0069] During testing, the output signal points of the tooling control box are matched one-to-one with the input signal points of the door controller. The handle is convenient for carrying and the installation is secure. The test power supply, enable signal, zero speed signal, door opening signal, and door closing signal are all correct, with an accuracy rate of 100%.

[0070] The power-on test confirmed that the door opening and closing functions, anti-pinch function, and isolation function were normal, and there was no collision or abnormal noise during the opening and closing process, with a 100% accuracy rate.

[0071] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A test fixture for opening and closing subway car doors, characterized in that, include: The control box consists of a box body (1), a first box cover (2) and a second box cover (3). The first box cover (2) is sandwiched between the box body (1) and the second box cover (3). The box body (1) is provided with a handle (4). Buttons (5) are provided in multiple ways, all of which are connected to the first box cover (2); The circuit breaker (6) is connected to the first box cover (2); The connector (7) is connected to the housing (1) and is connected to the door LDCU, door MDCU and button (5) respectively by wiring; Terminal block (8) is connected in the housing (1) and connected between the circuit breaker (6) and the button (5) by wiring; The contactor (9) is connected in the housing (1) and is connected to the terminal block (8), the door LDCU and the door MDCU respectively by wiring.

2. The test fixture for opening and closing subway car doors according to claim 1, characterized in that, The control box has a box body (1) with dimensions of 200mm×300mm×130mm, made of polycarbonate material, with a waterproof rating of IP65, and the first box cover (2) is made of stainless steel.

3. The test fixture for opening and closing subway car doors according to claim 1, characterized in that, The connector (7) has 10 pins, a working current of 16A, a working voltage of 500V, and a working temperature of -40℃ to 125℃.

4. The test fixture for opening and closing subway car doors according to claim 1, characterized in that, The coil voltage of the contactor (9) is DC77V-137V, and the contacts are 4 pairs of normally open contacts.

5. The test fixture for opening and closing subway car doors according to claim 1, characterized in that, The rated voltage of the button (5) is DC110V, the rated current is 1A, and the contact material is silver alloy and gold alloy.

6. The test fixture for opening and closing subway car doors according to claim 1, characterized in that, The circuit breaker (6) has a current rating of 6A and a voltage rating of DC110V.

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