Multi-stage pedal with connecting link guardrails

Abstract

The utility model discloses a kind of multistage pedal with connecting rod guardrails, including front and rear hinged front pedal, middle pedal, front pedal, middle pedal are hinged by first shaft, the sidewall of front pedal, middle pedal is respectively hinged first connecting rod, second connecting rod by second shaft, third shaft, first connecting rod top and second connecting rod are hinged, when front pedal unfolds, second shaft, third shaft are located respectively on the two sides of first shaft, and the height of second shaft, third shaft is less than first shaft;Second connecting rod top and driving device are connected, or connect by third connecting rod, fourth connecting rod and middle pedal sidewall connection.The multistage pedal of the utility model, side guardrail is located on the two sides of pedal, does not occupy aisle space, side guardrail is multiple connecting rod mechanism, and is linked with pedal, in the unfolding process of pedal, side guardrail is synchronously automatically raised, is automatically stored when folding, easy to operate.

Description

Technical Field

[0001] This utility model relates to a rail transit treadmill, and more particularly to a multi-stage treadmill with connecting guardrails. Background Technology

[0002] In the field of rail transit, the step area of ​​the lifting platform at the train door is usually equipped with a side guardrail device. Its working principle is to restrict the range of motion of passengers through a rigid or adjustable structure to prevent them from stepping into the air or falling, so as to ensure the safety of passengers or wheelchairs when getting on and off the train.

[0003] Existing side railing structures for footboards generally employ fixed metal railings or folding / retractable railings. Fixed railings are welded or bolted to the edge of the footboard, offering a simple structure and reliable connection. However, they lack flexibility, occupy a large space, and cannot meet the space-constrained requirements of multi-stage footboard folding and storage. Folding / retractable railings unfold for protection when in use and fold away when not in use, typically using hinges or sliding rails. However, folding / retractable railings usually require manual operation, making the adjustment process cumbersome, and they lack self-locking or positioning functions. Over time, subjected to passenger / wheelchair collisions or train vibrations, connecting components (such as hinges or sliding rails) are prone to wear, loosening, or even breakage, affecting the safety and reliability of footboard use and increasing maintenance costs.

[0004] In addition, most existing fixed and folding / telescopic side guardrails are fixed to both sides of the upper surface of the pedal. When unfolded, they occupy the limited clearance of the pedal, and when folded, they occupy the thickness space of the pedal, which makes it difficult to meet the usage requirements of the vehicle. Utility Model Content

[0005] Purpose of the utility model: The purpose of this utility model is to provide a multi-stage tread mechanism with a connecting rod guardrail that is easy to operate and does not occupy passageway space.

[0006] Technical solution: The present invention provides a multi-stage tread with a connecting rod guardrail, comprising a front tread and a middle tread hinged together. The front tread and the middle tread are hinged together by a first shaft. The side walls of the front tread and the middle tread are respectively hinged to a first connecting rod and a second connecting rod by a second shaft and a third shaft. The top of the first connecting rod is hinged to the second connecting rod. When the front tread is unfolded, the second shaft and the third shaft are located on both sides of the first shaft, and the height of the second shaft and the third shaft is less than that of the first shaft. The top of the second connecting rod is connected to a driving device, or the top of the second connecting rod is connected to the side wall of the middle tread through a third connecting rod and a fourth connecting rod.

[0007] Preferably, the length of the second link is greater than the length of the link, and the top of the first link is hinged to one side of the second link via the fourth axis.

[0008] Preferably, the main pedal is hinged to the rear of the middle pedal, and the two ends of the third link are bent.

[0009] Preferably, the top of the second link is connected to the side wall of the front pedal via a fifth link and a sixth link. When the front pedal is deployed, the fifth link and the sixth link form a side guardrail for the front pedal.

[0010] Preferably, the sixth link is bent toward the first link.

[0011] Preferably, the middle pedal sidewall is provided with a limiting pin, and when the front pedal is folded, the fourth link and the limiting pin abut against each other. The limiting pin is provided to prevent the second link from rotating excessively.

[0012] Preferably, the main pedal sidewall is hinged to the handrail, and the tail of the drive device is hinged to the base of the handrail.

[0013] Preferably, the driving device is a gas spring or an electric push rod.

[0014] Preferably, a lifting device is connected to the other side of the main pedal opposite to the handrail.

[0015] Preferably, a rear pedal is hinged behind the main pedal.

[0016] Beneficial effects: Compared with the prior art, this utility model has the following significant advantages: 1. Simple operation and side rails do not occupy aisle space: The side rails are located on both sides of the pedal, without occupying aisle space. The side rails are multi-link mechanisms, and the side rails are linked with the pedals. During the pedal unfolding process, the side rails automatically rise synchronously and automatically retract when folded, making operation simple; 2. Small storage volume, strong installation applicability, small vehicle space occupation, compact structure, simple operation, sturdy and durable, controllable cost, and applicable to the pedal structure of various types of rail vehicles and other vehicles; 3. In the unfolded working state, the connection structure is simple and easy to maintain, and there will be no loosening problem, making it safe and reliable. Attached Figure Description

[0017] Figure 1 This is a bottom view of the multi-stage pedal structure of this utility model in its unfolded state;

[0018] Figure 2 This is a bottom view of the multi-stage pedal folding structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the multi-stage pedal unfolding structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the multi-stage pedal front pedal folding structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the fully folded multi-stage pedal structure of this utility model. Detailed Implementation

[0022] The technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0023] like Figures 1 to 3 As shown, the multi-stage pedal system includes a front pedal 1 and a middle pedal 2 arranged front to back. The rear of the front pedal 1 and the front of the middle pedal 2 are hinged by a shaft 11. The front pedal 1 can rotate around the shaft 11 to overlap with the middle pedal 2 and retract, or rotate to be on the same plane as the middle pedal 2 and unfold. Linkage assemblies are provided on the left and right side walls of the front pedal 1 and the middle pedal 2. When the linkage assemblies are raised, they drive the front pedal 1 to unfold and also serve as side rails for the front pedal 1 and the middle pedal 2. When the linkage assemblies are folded, they drive the front pedal 1 to fold.

[0024] The linkage assembly mainly consists of link 7 and link 8. The bottoms of link 7 and link 8 are hinged to the side walls of the front pedal 1 and the middle pedal 2 via shafts 13 and 14, respectively. The top of link 7 is hinged to link 8 via shaft 12. Figure 1 After the front pedal 1 is deployed, shafts 13 and 14 are located on both sides of shaft 11, and the vertical height of shafts 13 and 14 is lower than that of shaft 11. Figure 2 When link 8 is driven by an external force to rotate around the middle pedal 2 at a certain angle, shaft 13 and link 7 can pass over shaft 11, causing the front pedal 1 to fold. The length of link 8 is greater than the length of link 7, that is, the top of link 8 protrudes relative to link 7. Shaft 12 is located on one side of link 8. The protruding part of link 8 can connect to link 4. The other end of link 4 is connected to the side of the middle pedal 2 through link 3. Link 3, link 8, link 4 and middle pedal 2 form a four-bar linkage structure. Manually driving link 4 to lift it drives link 8 to rotate around pedal 2, causing the front pedal 1 to unfold and the side railing of the middle pedal 2 to rise. Figure 2 , Figure 4 The middle pedal 2 has a limiting pin 9 on its side. After the connecting rod assembly drives the front pedal 1 to fold, the limiting pin 9 abuts against the connecting rod 3 below the connecting rod 3.

[0025] The top of the protruding part of the connecting rod 8 can also be connected to the drive device 18. The drive device 18 is a telescopic drive device. When the drive device 18 extends, it drives the connecting rod 8 to rotate around the middle pedal 2, and through the connecting rod 7, it drives the front pedal 1 to rotate relative to the middle pedal 2, thus unfolding it. The drive device can be a gas spring or an electric push rod. Similarly, the connecting rod 3, connecting rod 8, drive device, and middle pedal 2 form a four-bar linkage structure. When the front pedal 1 unfolds, the drive device and connecting rod 8 form a side guardrail. The drive device 18 enables automatic control of the multi-stage pedal retraction and extension, reducing the operator's workload and expanding the application range of the multi-stage pedal. Preferably, the top of the connecting rod 8 located on one side (left or right) of the middle pedal 2 is connected to the drive device 18, and the top of the connecting rod 8 located on the other side of the middle pedal 2 is connected to the side wall of the middle pedal 2 through the connecting rod 4. The drive device is an active linkage mechanism, and the other side is a driven linkage mechanism, ensuring that the multi-stage pedal unfolds automatically and the folding process is smooth.

[0026] The linkage assembly also includes linkage 6 and linkage 5. Linkage 6 is hinged to the side of the front pedal 1, and the top of linkage 6 is connected to the top of linkage 8 via linkage 5. The front pedal 1, linkage 6, linkage 5, and linkage 8 form a four-bar linkage structure. When the front pedal 1 is unfolded, linkages 5 and 4 rise simultaneously, forming side railings on both sides of the front pedal 1. When the front pedal 1 is unfolded, linkages 5 and 4 fold simultaneously, concealed on both sides of the multi-level pedals, without occupying aisle space. Linkage 6 bends towards linkage 7, and the structure of linkage 6 allows for a smooth transition at the end of the side railings of the front pedal 1.

[0027] like Figures 3 to 5 The multi-stage pedal also includes a main pedal 15, located behind the middle pedal 2. The front side of the main pedal 15 is hinged to the rear side of the middle pedal 2. The middle pedal 2 can rotate to overlap the main pedal 15. A lifting device (not shown) is hinged to the left or right wall of the main pedal 15. Figure 1 , Figure 2 The connecting rod 4 is bent at both ends, forming an upward-opening U-shape. When the middle pedal 2 is rotated and folded toward the main pedal 15, the top opening of the connecting rod 4 can avoid the left and right sides of the main pedal 15, reducing the space occupied by the pedal in the thickness direction when folded and preventing interference. When folded, the connecting rod 4 does not extend beyond the bottom surface of the middle pedal 2.

[0028] Relative to the lifting device, the other side of the main pedal 15 is hinged to the armrest 17. One end of the drive device 18 is connected to the top of the connecting rod 8, and the other end is hinged to the base of the armrest 17. When the middle pedal 2 rotates around the main pedal 15 to overlap with it, the drive device rotates around the base, and the middle pedal 2 is folded. When retracted, the armrest 17 is folded and located above the middle pedal 2. The rear pedal 16 is hinged to the rear side of the main pedal 15. The rear pedal 16 includes a horizontal plate and a vertical baffle. The horizontal plate is used to expand the area of ​​the main pedal 15, and the vertical baffle is used to ensure the safety of people and wheelchairs on the main pedal 15 and prevent slippage. A vertical baffle is also provided in front of the front pedal 1.

[0029] Both the front step 1 and the middle step 2 are constructed from high-strength aluminum alloy profiles, ensuring they meet the high load-bearing requirements of the lifting platform while maintaining controllable weight and adaptability to low-temperature environments down to -40°C. To guarantee corrosion resistance, the surface undergoes anodizing. The surface features evenly distributed grooves for anti-slip properties. The connecting rods are made of high-strength alloy steel with a galvanized surface, meeting the system's strength, low-temperature operation, and corrosion resistance requirements.

[0030] Detailed operating procedures: as follows Figures 3 to 5 When the train comes to a stop on the platform and the doors open, the operator rotates and positions the lifting device outside the train, unfolds the handrail 17, and then manually (or driven by the drive device 18) unfolds the middle step 2 and the front step 1 on the platform. At this time, the connecting rod assemblies on both sides of the middle step 2 and the front step 1 will automatically unfold as the middle step 2 and the front step 1 unfold, forming two side guardrails to protect passengers on the platform. After the lifting device is used, the platform steps are folded and stored. The connecting rod assemblies will automatically fold and be placed on both sides of the middle step 2 and the front step 1 as the front step is unfolded, minimizing the space occupied by the platform when it is folded.

Claims

1. A multi-stage tread with a connecting rod guardrail, comprising a front tread (1) and a middle tread (2) hinged together, the front tread (1) and the middle tread (2) being hinged together via a first shaft (11), characterized in that, The front pedal (1) and the middle pedal (2) are respectively hinged to the first link (7) and the second link (8) via the second shaft (13) and the third shaft (14). The top of the first link (7) is hinged to the second link (8). When the front pedal is unfolded, the second shaft (13) and the third shaft (14) are located on both sides of the first shaft (11), and the height of the second shaft (13) and the third shaft (14) is less than that of the first shaft (11). The top of the second link (8) is connected to the drive device (18), or the second link (8) is connected to the side wall of the middle pedal (2) via the third link (4) and the fourth link (3).

2. The multi-stage treadle with connecting rod guardrail according to claim 1, characterized in that, The length of the second link (8) is greater than the length of the link (7), and the top of the first link (7) is hinged to the second link (8) via the fourth shaft (12).

3. The multi-stage treadle with connecting rod guardrail according to claim 1, characterized in that, The main pedal (15) is hinged to the rear of the middle pedal (2), and the two ends of the third link (4) are bent.

4. The multi-stage treadle of the railing with linkage according to any one of claims 1 to 3, characterized in that, The top of the second link (8) is connected to the side wall of the front pedal (1) through the fifth link (5) and the sixth link (6). When the front pedal is unfolded, the fifth link (5) and the sixth link (6) form the side guardrail of the front pedal.

5. The multi-stage treadle with connecting rod guardrail according to claim 4, characterized in that, The sixth link (6) bends toward the first link (7).

6. The multi-stage treadle with connecting rod guardrail according to claim 1, characterized in that, The middle pedal (2) has a limiting pin (9) on its side wall. The front pedal (1) is folded, and the fourth link (3) and the limiting pin (9) abut against each other.

7. The multi-stage treadle with connecting rod guardrail according to claim 3, characterized in that, The main pedal (15) is hinged to the side wall of the handrail (17), and the tail of the drive device (18) is hinged to the base of the handrail (17).

8. The multi-stage treadle with connecting rod guardrail according to claim 7, characterized in that, The drive device (18) is a gas spring or an electric push rod.

9. The multi-stage treadle with connecting rod guardrail according to claim 7, characterized in that, The main pedal (15) is connected to a lifting device on the other side of the handrail (17).

10. The multi-stage treadle with connecting rod guardrail according to claim 3, characterized in that, The rear pedal (16) is hinged behind the main pedal (15).

Images