A smart sensor-operated rotating pedal for subway doors

Abstract

A smart sensor-activated rotating pedal for subway doors is disclosed. The pedal is fixedly connected to a rotating connector. The main unit contains a motor and a main control board. The main control board controls the motor's operation. The motor's power gear meshes with the transmission gear on the drive shaft, thereby driving the drive shaft to rotate. The drive shaft is fixedly connected to the rotating connector. If the pedal's rotation is obstructed, the motor rises, and the main control board stops the motor. This invention provides a smart sensor-activated rotating pedal device that actively, smoothly, and protectively flips outward and closes to the platform floor when the door opens. The motor's power gear meshing transmission and the drive shaft driving the rotating pedal are combined with multi-sensor detection and current detection modules. The main control board provides unified logic control and automatically extends and retracts the pedal according to a preset sequence.

Description

Technical Field

[0001] This utility model relates to a carriage auxiliary device, and more particularly to a smart sensor-operated rotating pedal for subway doors. Background Technology

[0002] In subway transit systems, a certain gap often exists between the train doors and the platform to accommodate factors such as track curvature or platform design. While this gap is necessary, it can easily lead to accidents for passengers boarding and alighting, such as feet getting stuck, luggage falling, or difficulties for people with disabilities. This is especially true during peak hours or when passengers are carrying wheelchairs or strollers, where the safety hazards are particularly pronounced. According to relevant statistics, subway gap accidents have become a common problem in urban rail transit safety management.

[0003] Existing technologies for solving this problem mainly fall into several categories:

[0004] 1. Mechanically fixed or spring-loaded passive pedals have a simple structure but cannot dynamically adapt to the actual working conditions of different platforms and trains;

[0005] 2. Hydraulic / pneumatically driven telescopic pedals offer smooth operation but are complex, costly, and require advanced onboard air / liquid supply and maintenance.

[0006] 3. While motor-driven active pedals can achieve relatively precise motion control and linkage with door signals, they still have several shortcomings in practical engineering. Common problems include unreliable sensing and judgment (leading to false extension and retraction), and high impact and wear during operation (shortening service life). Utility Model Content

[0007] A smart sensor-operated rotating pedal for subway doors is provided. The pedal is fixedly connected to a rotating connector. The main unit contains a motor and a main control board. The main control board controls the operation of the motor. The motor's power teeth mesh with the transmission teeth on the transmission shaft, thereby driving the transmission shaft to rotate. The transmission shaft is fixedly connected to the rotating connector. When the pedal rotation is obstructed, the motor rises, and the main control board controls the motor to stop.

[0008] This invention provides a smart sensing rotating pedal device that actively, smoothly, and protectively flips outward and closes to the platform floor when the door opens. This solution addresses technical problems such as the ease of accidental extension and retraction of existing pedals, insufficient obstacle detection leading to high risk of pinching injuries, inadequate operational reliability and position feedback, high requirements for vehicle power supply and maintenance, and difficulty in accurately matching the stopping sequence. It utilizes a motor and power gear meshing transmission within the main unit to drive the rotating pedal, and is equipped with multi-sensor detection and current detection modules. The main control board provides unified logic control and automatic extension and retraction according to a preset timing sequence.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A smart sensor-operated rotating pedal for subway doors includes: a main unit and a pedal. The pedal is fixedly connected to a rotating connector. The main unit contains: a motor and a main control board. The main control board controls the operation of the motor. The motor's power teeth mesh with the transmission teeth on the transmission shaft, thereby driving the transmission shaft to rotate. The transmission shaft is fixedly connected to the rotating connector. When the pedal rotation is obstructed, the motor rises, and the main control board controls the motor to stop.

[0011] Further configuration includes a base plate, a top cover, a left side plate, and a right side plate. The left side plate is connected to the left side of the base plate, and the right side plate is connected to the right side of the base plate. The top cover is placed on top of the base plate.

[0012] Further configuration: the motor is fixed to the upper surface of the base plate, and the output shaft of the motor is equipped with a follower mark that rotates synchronously with the power gear. A photoelectric sensor is installed on the side of the power gear on the base plate. The follower mark is recorded once by the photoelectric sensor when the power gear rotates one revolution. The photoelectric sensor is electrically connected to the main control board.

[0013] Further configuration includes an infrared detection probe. The main control board will only control the motor to run when the infrared detection probe detects no obstacles. The main control board has a built-in battery that powers the main control board and the motor.

[0014] Further configuration involves embedding a switch board in the left side panel, which is electrically connected to the main control board.

[0015] This invention provides a smart sensing rotating pedal device that actively, smoothly, and protectively flips outward and closes to the platform floor when the door opens. This solution addresses technical problems such as the ease of accidental extension and retraction of existing pedals, insufficient obstacle detection leading to high risk of pinching injuries, inadequate operational reliability and position feedback, high requirements for vehicle power supply and maintenance, and difficulty in accurately matching the stopping sequence. It utilizes a motor and power gear meshing transmission within the main unit to drive the rotating pedal, and is equipped with multi-sensor detection and current detection modules. The main control board provides unified logic control and automatic extension and retraction according to a preset timing sequence. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is an exploded view of the present invention;

[0019] Figure 4 This is an exploded view of some components of this utility model;

[0020] In the picture:

[0021] Base plate 11, top cover 12, left side plate 13, right side plate 14, pedal 2, rotating connector 21.

[0022] Motor 3, power gear 31, follower marking plate 32, transmission gear 41, transmission shaft 42

[0023] 5. Infrared detection probe; 6. Photoelectric sensor; 7. Battery; 8. Main control board; 9. Switch board. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual proportions. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Example 1: Main Structure and Transmission Mechanism

[0029] like Figure 1-4 As shown, the intelligent sensor-operated rotating pedal for subway doors disclosed in this utility model includes a main unit and a pedal 2. The main unit comprises a base plate 11, a top cover 12, a left side plate 13, and a right side plate 14. The left side plate 13 is connected to the left side of the base plate 11, the right side plate 14 is connected to the right side of the base plate 11, and the top cover 12 covers the base plate 11, together forming a closed or semi-closed main unit housing. This modular housing design not only facilitates the installation and maintenance of internal precision components but also provides necessary physical protection for the core transmission and control system, enabling it to resist external environmental erosion and potential physical impacts.

[0030] The pedal 2 is fixedly connected to the main unit via a rotating connector 21, which is also fixedly connected to the drive shaft 42 inside the main unit. A motor 3 is installed inside the main unit and is fixed to the upper surface of the base plate 11. A power gear 31 is provided on the output shaft of the motor 3, which meshes with the transmission gear 41 on the drive shaft 42. When the main control board 8 controls the motor 3 to operate, the power gear 31 drives the transmission gear 41 to rotate, which in turn drives the drive shaft 42 to rotate, ultimately achieving the flipping action of the pedal 2. Compared to direct connection or belt drive, this gear-drive shaft transmission structure has higher transmission efficiency, stronger torque transmission capability, and better motion precision. It can effectively convert the high speed and low torque output of the motor into the low speed and high torque required by the pedal, thereby ensuring that the pedal's rotational action is smooth, powerful, and controllable.

[0031] If the pedal 2 encounters an obstacle during rotation, causing the rotation to be obstructed, the load on the motor 3 will increase. The main control board 8 detects this abnormality by detecting the change in the current of the motor 3 and immediately controls the motor 3 to stop running, thereby effectively preventing the occurrence of pinching accidents.

[0032] Example 2: Intelligent Control and Safety Protection

[0033] To achieve precise position control and safety protection, this embodiment adds multiple sensors based on embodiment one.

[0034] Position Feedback Control: To achieve precise control of pedal movement, this invention employs a position feedback mechanism based on a photoelectric sensor. A follower marker 32, rotating synchronously with the power gear 31, is fixedly connected to the output shaft of the motor 3. A photoelectric sensor 6 is installed on the side of the power gear 31 on the base plate 11. When the power gear 31 rotates, its synchronous follower marker 32 periodically passes through the detection range of the photoelectric sensor 6. Each time the photoelectric sensor 6 records a marker, it means that the power gear 31 has completed one revolution. This sensor is electrically connected to the main control board 8, enabling it to transmit precise rotation count signals to the main control board in real time. By recording the number of revolutions of the power gear 31, the main control board 8 can accurately calculate the rotation angle of the pedal 2. This allows the pedal extension and retraction actions to stop precisely at the preset position, avoiding impacts or safety hazards caused by overshoot or undershoot, thus ensuring the smoothness and reliability of the pedal movement. This mechanism directly solves the technical problems of "insufficient action reliability and position feedback" and "difficulty in accurately matching with the stopping sequence" in the prior art.

[0035] Obstacle Detection: This device is equipped with an infrared detection probe 5 on the main unit, specifically for real-time detection of whether there are obstacles in the path of the extended pedal 2. This system makes a judgment before the pedal is activated, serving as a proactive preventative safety measure. Only when the probe detects no obstacles in the path will the main control board 8 issue a command to allow the motor 3 to start running. Unlike the traditional passive method of judging obstacles by detecting motor current overload, the infrared detection mechanism of this utility model is a proactive protection, avoiding equipment damage or personnel injury accidents that may be caused by misoperation or obstacles in front. This "prevention before the event" intelligent protection directly solves the "high risk of pinching" problem mentioned in the background technology, reflecting the designer's high regard for safety performance.

[0036] Power Supply and Operation: The main unit is equipped with a battery 7, which provides independent power to the main control board 8 and the motor 3, ensuring that the equipment can still operate normally without external power. In addition, a switch board 9 is embedded in the left side panel 13. The switch board 9 is electrically connected to the main control board 8 and is used to manually control the start, stop or mode switching of the equipment, enhancing the flexibility of operation.

[0037] The design incorporates a mechanism where "if pedal 2 is obstructed from rotating, motor 3 rises, and the main control board 8 stops motor 3." This mechanism is a physical feedback-based passive safety protection, and its working principle is as follows:

[0038] When pedal 2 encounters an obstacle, such as a passenger's foot or luggage, during its extension or retraction, its rotational movement is immediately impeded, generating a reverse torque. This torque is transmitted to the motor 3 body through the transmission system's drive shaft, drive gears, and power gears. Since the motor 3's mounting structure is not completely rigid, this torque causes a slight upward displacement of the motor body. This slight displacement triggers a preset mechanical or inductive switch, which immediately sends an emergency stop signal to the main control board 8. Upon receiving the signal, the main control board 8 immediately cuts off the power supply to the motor 3, causing it to stop instantly. This physical feedback mechanism offers far superior response speed and reliability compared to methods that rely solely on software judgment, such as detecting abnormal increases in motor current. Through a clever mechanical design, it creates an independent physical "circuit breaker" unaffected by electrical noise, achieving millisecond-level safety response and fundamentally solving the problem of "high risk of pinching" in existing technologies.

[0039] This invention provides a smart sensing rotating pedal device that actively, smoothly, and protectively flips outward and closes to the platform floor when the door opens. This solution addresses technical problems such as the ease of accidental extension and retraction of existing pedals, insufficient obstacle detection leading to high risk of pinching injuries, inadequate operational reliability and position feedback, high requirements for vehicle power supply and maintenance, and difficulty in accurately matching the stopping sequence. It utilizes a motor and power gear meshing transmission within the main unit to drive the rotating pedal, and is equipped with multi-sensor detection and current detection modules. The main control board provides unified logic control and automatic extension and retraction according to a preset timing sequence.

[0040] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A smart sensor-activated rotating pedal for subway doors, characterized in that, include: The main unit and pedal (2) are fixedly connected to the rotating connector (21). The main unit contains a motor (3) and a main control board (8). The main control board (8) controls the operation of the motor (3). The power gear (31) of the motor (3) meshes with the transmission gear (41) set on the transmission shaft (42), thereby driving the transmission shaft (42) to rotate. The transmission shaft (42) is fixedly connected to the rotating connector (21). When the pedal (2) is obstructed from rotating, the motor (3) rises. The main control board (8) controls the motor (3) to stop.

2. The intelligent sensor-operated rotating pedal for a subway door according to claim 1, characterized in that: The host includes: The bottom plate (11), the top cover (12), the left side plate (13), and the right side plate (14) are connected to the left side of the bottom plate (11), and the right side plate (14) is connected to the right side of the bottom plate (11). The top cover (12) covers the bottom plate (11).

3. The intelligent sensor-operated rotating pedal for a subway door according to claim 1, characterized in that: The motor (3) is fixed on the upper surface of the base plate (11). The output shaft of the motor (3) is equipped with a follower mark (32) that rotates synchronously with the power gear (31). The base plate (11) is equipped with a photoelectric sensor (6) on the side of the power gear (31). The follower mark (32) is recorded once by the photoelectric sensor (6) when the power gear (31) rotates one revolution. The photoelectric sensor (6) is electrically connected to the main control board (8).

4. The intelligent sensor-operated rotating pedal for a subway door according to claim 1, characterized in that: The main unit is equipped with an infrared detection probe (5). The main control board (8) will control the motor (3) to run when the infrared detection probe (5) detects no obstacles. The main unit is equipped with a battery (7), which supplies power to the main control board (8) and the motor (3).

5. A smart sensor-operated rotating pedal for a subway door according to claim 2, characterized in that: The left side panel (13) is embedded with a switch board (9), which is electrically connected to the main control board (8).

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