Pedal gravity detection device

Abstract

The application discloses a pedal gravity detection device, which comprises a movable pedal, the movable pedal slides horizontally in a guide rail through a bearing roller, gravity detection mechanisms are installed on the rear sides of the movable pedal, the gravity detection mechanism comprises a swing push-pull assembly and a detection element, the movable pedal moves horizontally in a free state through the swing push-pull assembly cooperating with the bearing roller to realize support, the swing push-pull assembly triggers the detection element when the movable pedal bears in front, and the detection of the surface load of the movable pedal is realized. The application has the advantages of simple structure, high reliability, convenient maintenance, long service life of gravity detection, and greatly reduced use cost; and the composition of the device is mainly composed of mechanical components, is less affected by temperature, can be applied to an ultralow-temperature environment, and improves the use temperature range of the gravity detection device.

Description

Technical Field

[0001] This invention belongs to the field of rail vehicle pedal technology, and more specifically, relates to a pedal gravity detection device. Background Technology

[0002] Rail transit vehicles are typically equipped with step stools to compensate for the distance or height difference between the vehicle entrance and the platform, facilitating passenger boarding and alighting. As vehicle requirements for intelligence and safety increase, step stools are usually required to have gravity detection functions. These functions identify whether there are passengers or heavy objects on the step stools and control the movement of the step stools based on the monitoring results, preventing injuries caused by step stool movement during passenger boarding and alighting.

[0003] Existing gravity detection devices can be divided into two types: direct detection and indirect detection.

[0004] The direct detection method primarily involves placing a sensing pad with a sensitive resistor on the pedal surface. When a person or heavy object is on the pedal, the sensitive resistor is triggered, thus detecting the gravity. However, this method requires the sensing pad to occupy space within the pedal's thickness and is unsuitable for ultra-low temperature environments due to the limitations of the sensitive element. Furthermore, this sensing pad is typically made of non-metallic materials, making it easily damaged, requiring regular replacement, and costly.

[0005] Indirect detection methods primarily use strain gauges to measure the stress generated on the pedals during passenger boarding and alighting. However, because pedal stress is affected by various factors such as installation, pedal extension / retraction length, and ambient temperature, the detection results are poor, and it cannot be used in ultra-low temperature environments. Furthermore, strain gauges require sophisticated installation and maintenance, necessitating professional personnel for maintenance and regular calibration, resulting in high operating costs. Summary of the Invention

[0006] The purpose of this invention is to address the above-mentioned shortcomings by providing a pedal gravity detection device that improves the reliability and service life of the gravity detection device while reducing usage and maintenance costs, and expands the operating temperature range of gravity detection to meet the requirements of ultra-low temperature applications.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0008] A pedal gravity detection device includes a movable pedal that slides horizontally within a guide rail via load-bearing rollers. Gravity detection mechanisms are mounted on both rear sides of the movable pedal.

[0009] The gravity detection mechanism includes a swing push-pull assembly and a detection element. In its free state, the movable pedal moves horizontally by means of the swing push-pull assembly and the load-bearing rollers. When the front of the movable pedal is under load, the swing push-pull assembly triggers the detection element to detect the load on the surface of the movable pedal.

[0010] Furthermore, the bearing rollers include front bearing rollers mounted on both sides of the front part of the movable pedal and rear bearing rollers mounted on both sides of the rear part of the movable pedal, and the front bearing rollers and rear bearing rollers are located inside the guide rail;

[0011] In its free state, the front and rear bearing rollers of the movable pedal are in close contact with the lower side of the guide rail; when the front of the movable pedal is subjected to a load, the front side of the movable pedal is pressed down, and the rear bearing roller is lifted up and in close contact with the upper side of the guide rail.

[0012] Furthermore, when the movable pedal is in a free state, the swing push-pull assembly pulls down the rear end of the movable pedal to overcome the weight of the front part of the movable pedal, so that the rear bearing roller is in close contact with the lower side of the guide rail.

[0013] Furthermore, the diameters of the front and rear bearing rollers are smaller than the width of the guide rail.

[0014] Furthermore, the swing push-pull assembly includes mounting plates fixedly installed on both sides of the rear of the movable pedal, and also includes a rotating arm, a roller, and a swing arm;

[0015] One end of the rotating arm is rotatably connected to the mounting plate via a torsion spring, and the other end is equipped with a movable shaft; the roller is mounted on the movable shaft, and when the rotating arm rotates, it drives the movable shaft and the roller to move up and down.

[0016] The swing arm is rotatably connected to the mounting plate via a mounting shaft. The rear end of the swing arm has a U-shaped notch, which is connected to a movable shaft. When the movable shaft moves up and down, it can control the rotation of the swing arm. When the swing arm rotates, the front end of the swing arm can trigger a detection element.

[0017] Furthermore, the detection element is mounted on the movable pedal, located between the front and rear load-bearing rollers.

[0018] Furthermore, the mounting shaft is located near the rear end of the swing arm and away from the front end of the swing arm.

[0019] Furthermore, the detection element is preferably a non-contact switch, but a micro switch or pressure sensor may also be used.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] This invention provides a pedal gravity detection device with simple structure, high reliability, and easy maintenance, which can improve the service life of gravity detection and significantly reduce the cost of use. Furthermore, the device is mainly composed of mechanical parts, which are less affected by temperature and can be used in ultra-low temperature environments, thereby improving the operating temperature range of the gravity detection device. Attached Figure Description

[0022] Figure 1This is a schematic diagram of the overall structure of a pedal gravity detection device provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the movable pedal in its free state as described in the embodiment;

[0024] Figure 3 This is a schematic diagram of the movable pedal in the front bearing state as described in the embodiment.

[0025] In the diagram: 1. Gravity detection mechanism; 2. Movable pedal; 3. Front load-bearing roller; 4. Rear load-bearing roller; 5. Guide rail; 101. Mounting plate; 102. Torsion spring; 103. Rotary arm; 104. Roller; 105. Mounting shaft; 106. Movable shaft; 107. Swing arm; 108. Detection element. Detailed Implementation

[0026] Preferred embodiments of the present invention will now be described in more detail with reference to the accompanying drawings and specific examples.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] Example

[0030] This invention provides a pedal gravity detection device, such as... Figure 1As shown, it includes a movable pedal 2, which slides horizontally within a guide rail 5 via a bearing roller, and gravity detection mechanisms 1 are installed on both sides of the rear of the movable pedal 2.

[0031] In specific embodiments, such as Figure 2 and Figure 3 As shown, front bearing rollers 3 are installed on both sides of the front part of the movable pedal 2, and rear bearing rollers 4 are installed on both sides of the rear part. The front bearing rollers 3 and rear bearing rollers 4 are located inside the guide rail 5 and can move along the guide rail 5. The diameter of the front bearing rollers 3 and rear bearing rollers 4 is smaller than the width of the guide rail 5.

[0032] In specific embodiments, such as Figure 2 As shown, the gravity detection mechanism 1 includes a swing push-pull assembly and a detection element 108. The swing push-pull assembly includes a mounting plate 101, a torsion spring 102, a rotating arm 103, a roller 104, a mounting shaft 105, a movable shaft 106, and a swing arm 107. The detection element 108 is mounted on the movable pedal 2.

[0033] In this embodiment, the mounting plate 101 is mounted on both sides of the rear of the movable pedal 2. One end of the torsion spring 102 is fixed to the mounting plate 101, and the other end is mounted on the rotating arm 103. One end of the rotating arm 103 is rotatably connected to the mounting plate 101, and the other end is mounted with a movable shaft 106. A roller 104 is mounted on the movable shaft 106 and contacts the guide rail 5. Under the action of the torsion spring 102, the rotating arm 103 rotates counterclockwise, causing the roller 104 to press tightly against the guide rail 5. The mounting shaft 105 is mounted on the mounting plate 101, and the swing arm 107 is rotatably connected to the mounting shaft 105. One end of the swing arm 107 has a U-shaped notch, which is connected to the movable shaft 106. When the movable shaft 106 moves up and down, it can control the swing arm 107 to rotate around the mounting shaft 105. The detection element 108 is mounted on the movable pedal 2, close to the front end of the swing arm 107. When the front end of the swing arm 107 moves upward, it can trigger the detection element 108.

[0034] In this embodiment, the mounting shaft 105 is close to the rear end of the swing arm 107 and far away from the front end of the swing arm 107. When the rear end of the swing arm 107 moves downward under the action of the movable shaft 106, the front end of the swing arm 107 moves upward, and the movement distance of the front end is greater than that of the rear end, which amplifies the displacement.

[0035] In this embodiment, the detection element 108 is a non-contact switch, positioned between the front and rear support rollers. When the non-contact switch senses the swing arm 107, it sends a signal to the controller of the movable pedal 2. In some other embodiments, a microswitch or pressure sensor may also be used.

[0036] In this embodiment, the detection accuracy can be adjusted by the torsion spring 102, thereby enabling the detection of loads with different gravities.

[0037] In this embodiment, when the movable pedal 2 is in a free state, the rotating arm 103 rotates counterclockwise under the action of the torsion spring 102, causing the roller 104 to press tightly against the guide rail 5. Under the reaction force of the guide rail 5, the rear of the movable pedal 2 moves downward, overcoming the weight of the front of the movable pedal 2, causing the front bearing roller 3 and the rear bearing roller 4 to press tightly against the lower side of the guide rail 5. This allows the movable pedal 2 to move horizontally normally. Figure 2 As shown.

[0038] like Figure 3 As shown, when the front of the movable pedal 2 is subjected to a load, the front of the movable pedal 2 is pressed down, and the rear bearing roller 4 is lifted up and pressed against the upper side of the guide rail 5. During this process, the rotating arm 103 will rotate clockwise relative to the movable pedal 2, and at the same time, the movable shaft 106 connected to the rotating arm 7 will also rotate clockwise relative to the movable pedal 2, and drive the swing arm 107 to rotate clockwise.

[0039] The pedal gravity detection device described in this embodiment is mainly composed of mechanical components, which is less affected by temperature and has a wider range of applications.

[0040] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and principles of the described embodiments, and these modifications and variations should also be considered within the scope of protection of the present invention.

Claims

1. A pedal gravity detection device, characterized in that, It includes a movable pedal, which slides horizontally within a guide rail via load-bearing rollers. Gravity detection mechanisms are installed on both sides of the rear of the movable pedal. The gravity detection mechanism includes a swing push-pull assembly and a detection element. In the free state, the movable pedal moves horizontally by means of the swing push-pull assembly and the bearing rollers. When the front of the movable pedal is under load, the swing push-pull assembly triggers the detection element to detect the load on the surface of the movable pedal. The load-bearing rollers include front load-bearing rollers installed on both sides of the front of the movable pedal and rear load-bearing rollers installed on both sides of the rear of the movable pedal. The front load-bearing rollers and rear load-bearing rollers are located inside the guide rail. In its free state, the front and rear bearing rollers of the movable pedal are in close contact with the lower side of the guide rail; when the front of the movable pedal is subjected to a load, the front side of the movable pedal is pressed down, and the rear bearing roller is lifted up and in close contact with the upper side of the guide rail. The swing push-pull assembly includes mounting plates fixedly installed on both sides of the rear of the movable pedal, and also includes a rotating arm, rollers and a swing arm; One end of the rotating arm is rotatably connected to the mounting plate via a torsion spring, and the other end is equipped with a movable shaft; the roller is mounted on the movable shaft, and when the rotating arm rotates, it drives the movable shaft and the roller to move up and down. The swing arm is rotatably connected to the mounting plate via a mounting shaft. The rear end of the swing arm has a U-shaped notch, which is connected to a movable shaft. When the movable shaft moves up and down, it can control the rotation of the swing arm. When the swing arm rotates, the front end of the swing arm can trigger a detection element.

2. The pedal gravity detection device according to claim 1, characterized in that, When the movable pedal is in a free state, the swing push-pull assembly pulls down the rear end of the movable pedal, overcoming the weight of the front part of the movable pedal itself, so that the rear bearing roller is in close contact with the lower side of the guide rail.

3. The pedal gravity detection device according to claim 1, characterized in that, The diameters of the front and rear load-bearing rollers are smaller than the width of the guide rail.

4. The pedal gravity detection device according to claim 1, characterized in that, The detection element is mounted on the movable pedal, located between the front and rear load-bearing rollers.

5. The pedal gravity detection device according to claim 1, characterized in that, The mounting shaft is located near the rear end of the swing arm and away from the front end of the swing arm.

6. The pedal gravity detection device according to claim 1, characterized in that, The detection element includes, but is not limited to, one of a non-contact switch, a micro switch, or a pressure sensor.

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