Novel telescopic pedal

Abstract

The invention discloses a novel telescopic pedal which comprises a frame assembly, a cover plate assembly and a movable pedal assembly. A quick release lock assembly is arranged on the cover plate assembly; a platform detection assembly is arranged at the front end of the movable pedal assembly, and a gravity detection assembly is arranged at the rear end of the movable pedal assembly. A driving assembly, a locking assembly, an isolation assembly and an unlocking assembly are arranged in the frame assembly. The telescopic pedal shortens the disassembly and assembly time of the maintenance cover plate, has a platform detection function, protects the movable pedal and ensures the function; the movable pedal roller guide rails are optimized according to the stress characteristics of the rollers, independent guide rails are not needed, and weight reduction and efficiency improvement are achieved; a water collection type bottom plate is adopted below for guiding drainage; and the rear mounting points are integrated on the frame, so that an additional mounting bracket is not needed.

Description

Technical Field

[0001] The present invention relates to the field of rail transit vehicle door systems, and in particular to a novel telescopic pedal. Background Art

[0002] When rail transit vehicles stop at stations, steps are often installed at the entrance and exit areas to compensate for the gap between the vehicle and the platform. Some vehicles feature wider entrance and exit areas to accommodate faster boarding and alighting. The steps need to fully cover the entire width of the entrance and exit, necessitating a wide opening. Currently, most such steps require specialized tools to open maintenance covers, which is inconvenient and time-consuming. When extended, the steps can be too close to the upper surface of the platform, causing the vehicle to sink after loading, leaving the steps suspended on the platform and unable to retract. Currently, most steps require rollers to run on separate guide rails, increasing weight and cost. The lateral supports on both sides of the steps use rollers, which takes up a lot of space and is difficult to adjust. The rear of the steps is often supported by a beam, which is also space-consuming and heavy. The rear mounting bracket is separate from the step frame, occupying additional vehicle space. Water easily accumulates at the bottom, making drainage difficult.

[0003] Therefore, it is necessary to develop a new type of telescopic pedal in a targeted manner to overcome the above problems. Summary of the Invention

[0004] Purpose of the invention: In response to the shortcomings and defects of the existing technology, the present invention provides a new telescopic pedal with a quick-release maintenance cover and ensures sealing; adds a platform detection function to the movable pedal to avoid being too close to the upper surface of the platform when extended, thereby increasing safety; optimizes the guide rails, lateral supports, and installation points to reduce weight and space requirements; and makes targeted drainage optimization design at the bottom.

[0005] Technical solution: A new type of telescopic pedal of the present invention is characterized in that it includes a frame assembly, a cover assembly and a movable pedal assembly; the cover assembly is provided with a quick-release lock assembly; the front end of the movable pedal assembly is provided with a platform detection assembly, and the rear end of the movable pedal assembly is provided with a gravity detection assembly; the frame assembly is provided with a driving assembly, a locking assembly, an isolation assembly and an unlocking assembly.

[0006] Wherein, the driving assembly in the frame assembly drives the movable pedal assembly by means of a synchronous belt and a pulley.

[0007] Wherein, rollers are provided on both sides of the movable pedal assembly, the lower side of the roller runs on the frame, and the frame part on the upper side of the roller is provided with a roller limit block.

[0008] The platform detection assembly at the front end of the movable pedal assembly droops when the movable pedal assembly is extended, and a transverse limiting assembly is provided around the movable pedal assembly to limit the position of the movable pedal assembly.

[0009] Wherein, a water guide and drainage bottom plate is provided at the bottom of the frame assembly.

[0010] Wherein, the movable pedal assembly is provided with an oblique-pull transverse reinforcement support.

[0011] Wherein, the integrated mounting bracket of the rear mounting point of the frame assembly is integrated with the frame assembly.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention is a new type of telescopic pedal for rail transit, which is driven by a motor, a synchronous belt and a pulley, and has reliable drive. The pedal cover adopts a quick-release lock, which is easy to install and disassemble, and convenient for inspection and maintenance of the inside of the pedal. The front end of the pedal is equipped with a platform detection device to prevent the lower surface of the pedal from being too close to the platform and causing damage. It has a gravity detection function to increase passenger safety. The movable pedal runs directly on the pedal frame instead of an additional guide rail to reduce weight. The bottom plate adopts a water-guiding drainage structure to avoid water accumulation. The rear end mounting bracket is integrated with the pedal frame assembly to reduce the space requirement of the installation point. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the present invention in the closed position;

[0014] Figure 2 It is a structural schematic diagram of the present invention in an open state;

[0015] Figure 3 It is a side view schematic diagram of the structure of the present invention in the closed position;

[0016] Figure 4 It is a side view schematic diagram of the structure of the present invention in an open state;

[0017] Figure 5 A side sectional view of the frame of the present invention showing the pedal in a retracted position;

[0018] Figure 6 A side sectional view of the frame showing the pedal of the present invention in an open position;

[0019] In the figure, 1 is the frame assembly; 2 is the cover assembly; 3 is the quick-release lock assembly; 4 is the movable pedal assembly; 5 is the platform detection assembly; 6 is the gravity detection assembly; 7 is the drive assembly; 8 is the locking assembly; 9 is the isolation assembly; 10 is the unlocking assembly; 401 is the roller; 402 is the lateral limit assembly; 403 is the roller limit block; 404 is the frame; 405 is the water guide and drainage bottom plate; 406 is the integrated mounting bracket; and 407 is the lateral reinforcement support. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0021] The novel telescopic step of the present invention comprises a frame assembly 1, a cover assembly 2, and a movable step assembly 4. The cover assembly 2 is equipped with a quick-release lock assembly 3. The front end of the movable step assembly 4 is equipped with a platform detection assembly 5, and the rear end of the movable step assembly 4 is equipped with a gravity detection assembly 6. The frame assembly 1 is equipped with a drive assembly 7, a locking assembly 8, an isolation assembly 9, and an unlocking assembly 10. The drive assembly 7 within the frame assembly 1 drives the movable step assembly 4 using a synchronous belt and pulley system. Rollers 401 are provided on both sides of the movable step assembly 4. The lower sides of the rollers 401 run on a frame 404. Roller stoppers 403 are provided on the upper portion of the frame 404. The platform detection assembly 5 at the front end of the movable step assembly 4 droops when the movable step assembly 4 is extended. Lateral stoppers 402 are provided around the movable step assembly 4 to control its position. A water guide and drainage base plate 405 is provided at the bottom of the frame assembly 1. The movable step assembly 4 is equipped with a diagonally pulled lateral reinforcement support 407. An integrated mounting bracket 406 for the rear mounting point of the frame assembly 1 is integral with the frame assembly 1 .

[0022] The new telescopic pedal of the present invention includes: a pedal frame assembly, a cover assembly, a quick-release lock assembly installed on the cover assembly, a movable pedal assembly, a platform detection assembly installed at the front end of the movable pedal, a gravity detection assembly installed at the rear end, rollers and lateral limit blocks on both sides, a drive assembly consisting of a motor, a synchronous belt, a pulley, a synchronous rod, etc. installed in the frame assembly, a main lock including a locking assembly, an isolation assembly, and an unlocking assembly, and an L-shaped mounting bracket installed on the rear side.

[0023] The drive assembly, consisting of a motor, timing belt, pulley, and timing rod, is mounted within the pedal frame and connected to the movable pedal via a belt clamp on the movable pedal. The motor drives the timing belt, which in turn drives the belt clamp back and forth, thereby driving the movable pedal back and forth.

[0024] The main lock, installed within the pedal frame, consists of a locking mechanism, an isolation mechanism, and an unlocking mechanism. The locking mechanism automatically locks the movable pedal with a claw hook when the pedal is fully closed. To open the pedal, the claw hook is unlocked by an electromagnet and an unlocking block. The isolation mechanism uses an additional isolation claw hook to limit the movement of the locking mechanism's claw hook, allowing the movable pedal to be locked and isolated when needed. The unlocking mechanism releases the locking mechanism when necessary, disengaging the motor lock and allowing the pedal to be manually extended and retracted. The isolation and unlocking mechanisms are connected to the operating element via a wire rope for control.

[0025] The rollers on either side of the movable pedal run directly on the pedal frame. Based on the pedal's force characteristics, roller limiters are installed on the rear side of the frame. A gravity detection device based on the displacement mechanical lever amplification principle is located at the rear end of the movable pedal. This device triggers the sensor when mechanically triggered. Lateral limiters are installed on both sides to limit the left and right position of the movable pedal.

[0026] The front of the movable step has a platform detection device. When the step is extended, it naturally hangs down due to gravity. When it is retracted, it is pushed back into position by a nylon block fixed to the frame and compressed by a spring installed on both sides of the movable step. When the platform is close to the vehicle and the step is above the upper surface of the platform after being extended, if the lower surface of the movable step is too close to the upper surface of the platform, it will cause damage to the front rubber strip of the movable step. At the same time, if the vehicle is loaded and sinks at this time, the movable step may contact the upper surface of the platform and fall on the platform, making it impossible to retract or forcibly retracting it and causing damage. The function of the platform detection device is: when the vehicle is close to the platform and the step is above the upper surface of the platform after being extended, if the lower surface of the movable step is too close to the upper surface of the platform, the step will not be extended above the platform by colliding with the vertical surface of the platform in advance, thereby preventing the lower surface of the movable step from being too close to the upper surface of the platform.

[0027] The rollers on either side of the movable pedal run directly on the pedal frame, with a limit block installed on the upper portion of the rear frame. When the movable pedal is retracted, both the front and rear rollers are located under the limit blocks, preventing the movable pedal from bouncing up and down. When the movable pedal is extended, the rear roller is located under the limit block. When the pedal is loaded, the front roller presses down on the frame, while the rear roller lifts upward. The limit block restricts the upward movement of the rollers. A gap is also left for the gravity detection device to operate. The lateral limit block is a nylon slider that presses against the side of the pedal frame and is secured with a threaded adjustment and nut, providing low cost and easy adjustment.

[0028] The movable pedal is reinforced with diagonal supports on both sides. The support plate connects the movable pedal surface and the support rod. Ribs are added at the bend to improve strength. This eliminates the need for a crossbeam between the left and right support rods of the movable pedal, reducing weight and space requirements.

[0029] A cover assembly, constructed from a spliced ​​aluminum profile, sits above the pedal frame. This assembly serves as a sealing cover for the upper portion of the pedal and also provides support for the floor. A quick-release lock, featuring a rotating bolt, is installed on the cover, secured to the pedal frame using a key.

[0030] The pedal bottom plate is made of stamped aluminum plate, forming a funnel shape, with a drainage hole at the lowest point. Water entering the pedal cavity will flow along the slope of the bottom plate and collect in the drainage hole, and then flow out from the drainage hole.

[0031] The rear side of the step features an integrated L-shaped sheet metal mounting bracket. This bracket serves as both a connection between the rear bead and the frame, and a mounting point between the step and the vehicle body. The rear bead has a clearance notch, which is covered by a sealing plate. Fasteners are inserted through the clearance notch to secure the L-shaped sheet metal mounting bracket to the vehicle body.

[0032] The present invention requires convenient and rapid maintenance of the pedal, and the maintenance cover features quick-release functionality. The pedal includes a drive assembly, a locking assembly, an isolation assembly, and an unlocking assembly to meet the pedal's functional requirements. To enhance safety, the pedal needs to be able to identify a passenger or load on the pedal surface. When a passenger is detected, the pedal is disabled or stops, ensuring passenger safety.

[0033] To prevent the lower surface of the extended step from coming too close to the upper surface of the platform, which would damage the front rubber strip of the step and cause damage when forcibly retracted after the vehicle settles, a platform detection device is used. Existing steps usually only retract a certain distance when encountering an obstacle, which is less effective.

[0034] The pedal frame eliminates the need for additional roller guides, and the movable pedal utilizes stamped sheet metal for lateral support, reducing weight and space requirements. The rear mounting point utilizes an integrated mounting bracket, minimizing installation space and facilitating installation.

[0035] The lower base plate adopts a funnel-shaped structure, which allows accumulated water to collect and flow out from the drainage holes to avoid damage to the mechanical and electrical components inside the pedal.

[0036] This invention is a new type of retractable step for rail transit, driven reliably by a motor, synchronous belt, and pulley. The step cover features a quick-release lock, making installation and removal easy and facilitating internal inspection and maintenance. The front end of the step is equipped with a platform detection device to prevent damage to the lower surface of the step from being too close to the platform. A gravity detection function enhances passenger safety. The movable step operates directly on the step frame rather than on additional guide rails, reducing weight. The base plate utilizes a water-guiding and drainage structure to prevent water accumulation. The rear mounting bracket is integrated with the step frame assembly, reducing the space required for the installation point.

Claims

1. A new telescopic pedal, characterized by: The invention comprises a frame assembly (1), a cover assembly (2) and a movable pedal assembly (4); the cover assembly (2) is provided with a quick-release lock assembly (3); the front end of the movable pedal assembly (4) is provided with a platform detection assembly (5), and the rear end of the movable pedal assembly (4) is provided with a gravity detection assembly (6); the frame assembly (1) is provided with a driving assembly (7), a locking assembly (8), an isolation assembly (9) and an unlocking assembly (10).

2. The novel telescopic pedal according to claim 1 is characterized in that: The driving assembly (7) in the frame assembly (1) drives the movable pedal assembly (4) by means of a synchronous belt and a pulley.

3. The novel telescopic pedal according to claim 1 is characterized in that: The movable pedal assembly (4) is provided with rollers (401) on both sides. The lower side of the roller (401) runs on the frame (404). The frame (404) part on the upper side of the roller (401) is provided with a roller limit block (403).

4. The novel telescopic pedal according to claim 1 is characterized in that: The platform detection assembly (5) at the front end of the movable pedal assembly (4) droops when the movable pedal assembly (4) is extended, and a transverse limiting assembly (402) is provided around the movable pedal assembly (4) to limit the position of the movable pedal assembly (4).

5. The novel telescopic pedal according to claim 1 is characterized in that: A water guide and drainage bottom plate (405) is provided at the bottom of the frame assembly (1).

6. The novel telescopic pedal according to claim 3 is characterized in that: The movable pedal assembly (4) is provided with an obliquely pulled transverse reinforcement support (407).

7. The novel telescopic pedal according to claim 1 is characterized in that: The integrated mounting bracket (406) of the rear mounting point of the frame assembly (1) is integrated with the frame assembly (1).

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