Foldable ladder trolley

Abstract

The utility model belongs to the field of ladder trucks, particularly relates to a foldable ladder truck, and aims to solve the problem that an operator needs to consume a large amount of time and energy to carry out a tedious process of pushing the ladder truck to go off a track and advance due to the fact that an existing ladder truck cannot be quickly folded and restored. Two supporting frames are symmetrically hinged to the two sides of the top of the bottom frame, and the same platform is hinged to the tops of the two supporting frames. A locking mechanism is arranged on the bottom frame and used for locking and unlocking the two supporting frames, and folding and supporting of the supporting frames are facilitated. Due to the arrangement of the locking mechanism, an operator can quickly fold and restore the ladder trolley, easily fold and put down the ladder trolley to quickly avoid a running railway vehicle, and quickly support the support frame to lock and restore the ladder trolley after the vehicle passes through, so that the tedious process of pushing the ladder trolley to get off a road and pushing the ladder trolley is not needed; and avoiding is greatly reduced, the subway construction efficiency is improved, and the labor intensity is reduced.

Description

Technical Field

[0001] This utility model relates to the field of ladder truck technology, and in particular to a foldable ladder truck. Background Technology

[0002] A rail ladder vehicle is a maintenance and repair operation equipment specifically designed for railway, subway and other track systems. It consists of a movable chassis frame, climbing ladder, operating platform and drive system. Its core advantage is that it can quickly reach work points along the track to perform tasks such as overhead contact line maintenance, signal equipment maintenance and track inspection. It is an indispensable professional tool in the field of rail transit maintenance.

[0003] Currently, existing ladder cars are typically pushed to the tunnel entrance and off the track to let rail vehicles pass during subway construction. After the rail vehicles pass, the ladder cars are pushed back in for construction. Although this method ensures the passage of rail vehicles, it is impossible to quickly fold and unfold the ladder cars during this process. As a result, operators have to spend a lot of time and energy on the tedious process of pushing the ladder cars off the track and pushing them back in, which not only reduces the efficiency of subway construction but also increases the labor intensity. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the inability to quickly fold and unfold ladder cars, which not only reduces the efficiency of subway construction but also increases labor intensity. Therefore, a foldable ladder car is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A foldable ladder cart, comprising:

[0007] The base frame and the protective frame are provided. The top two sides of the base frame are symmetrically hinged with two support frames, and the top of the two support frames are hinged with the same platform.

[0008] The base frame is equipped with a locking mechanism for locking and unlocking the two support frames, facilitating the folding and support of the support frames. The platform is equipped with an adjustment mechanism for adjusting the height of the protective frame.

[0009] In one possible design, the locking mechanism includes a placement frame fixedly mounted inside the base frame. Pins are slidably mounted through both sides of the placement frame, and these pins can be disengaged and inserted into the side of the support frame. Two connecting frames are symmetrically mounted inside the placement frame. Two pins on the same side are fixedly connected to the connecting frames on the same side. Push blocks are slidably mounted through both sides of the placement frame, and the inner sides of the two push blocks are fixedly connected to the two connecting frames respectively. A sliding rod is fixedly mounted inside one of the connecting frames, and the other end of the sliding rod is slidably mounted through one side of the other connecting frame. A spring is sleeved on the outside of the sliding rod, and the two ends of the spring are fixedly connected to the adjacent sides of the two connecting frames via spring seats.

[0010] In one possible design, the adjustment mechanism includes four rectangular support columns fixedly mounted on the top of the platform. Each of the four support columns is fitted with a sleeve. The protective frame is fixedly mounted on the top of the four sleeves. Two of the support columns on opposite sides each have multiple positioning holes longitudinally opened on one side. A fixing frame is fixedly mounted on one side of the sleeve fitted on the two support columns on opposite sides. A button is hinged to the inner side of the fixing frame. A pin is hinged to the lower inner side of the button. The pin slides through one side of the sleeve and can be disengaged and inserted into the positioning hole. A second spring is fixedly mounted on the upper inner side of the button via a spring seat. The other end of the second spring is fixedly mounted on one side of the sleeve via a spring seat.

[0011] In one possible design, positioning posts 2 are fixedly installed on the upper sides of both of the two support frames, and tug blocks 2 are rotatably installed on the inner sides of multiple positioning posts 2. Positioning posts 1 are slidably installed on the lower sides of both of the two support frames, and tug blocks 1 are rotatably installed on the inner sides of multiple positioning posts 1. Loops are sleeved on the outer sides of positioning posts 2 and 1 on the same side. The same support rod is fixedly installed between two loops on opposite sides, and the two support rods on the same side are hinged together.

[0012] In one possible design, a sliding column is fixedly installed on one side of each of the plurality of positioning columns located below, and hooks are rotatably installed on one side of each of the two support frames located on the sliding column.

[0013] In one possible design, the base frame has four track wheels arranged in a rectangular shape on both sides for rotation.

[0014] In this application, when the subway construction process begins and a railcar is about to pass, in order to ensure construction safety and the normal operation of rail transit, the ladder car needs to be moved in time to avoid it. First, the operator pinches the blocks on both sides of the frame inside the base frame, causing the two blocks to move towards each other. The movement of the blocks will cause the connecting frame fixed to them to move synchronously. The movement of the connecting frame will in turn cause the pin fixed to it to move towards each other, thereby causing the pin to disengage from the side of the support frame. After the pin is disengaged, the lock between the two support frames and the base frame is released. Then, the hook frame is rotated to contact the hook of the sliding column. At this time, the operator can easily rotate the two support frames and gradually lower them. As the support frames are lowered, the platform hinged to the top of the support frames will also fold down. The entire ladder car begins to fold. When the ladder car is folded to a certain extent and close to a flat state, the operator stands the folded ladder car upright and places it on the side of the track in a position that does not affect the passage of the railcar, allowing the railcar to pass smoothly.

[0015] After the railcar has passed, when the ladder car needs to be restored, the operator goes to the ladder car and presses the button to retract the pin, preparing to support the frame. Then, the operator raises the two support frames, and the platform unfolds accordingly. When the support frames are raised to the appropriate angle, the button is released. At this time, the spring sleeved on the outside of the slide bar will push the two connecting frames to move to opposite sides through its own elasticity. The movement of the connecting frames will cause the pin to push outward, so that it re-inserts into the side of the support frame, thus locking the support frame.

[0016] After the support frame is locked, the platform is also fixed at a suitable height. At this time, the construction workers climb onto the platform through the support frame to continue the construction operation. After climbing onto the platform, they press one side of the two buttons located on opposite sides, causing the other side of the button to lift up. The lifting of the button will cause the pin hinged on the inner side below it to disengage from the positioning hole on one side of the support column. After the pin disengages from the positioning hole, the operator can lift the protective frame upward as needed. When the protective frame reaches a suitable height, the button is released. At this time, the second spring will push the button back to its original position through the elastic principle, thereby causing the pin to re-insert into the corresponding positioning hole, completing the adjustment and locking of the height of the protective frame.

[0017] In addition, during the unfolding of the support frame, the strut will drive the lower positioning column to move upward (during the folding of the support frame, the strut will also drive the lower positioning column to move downward). As the positioning column moves upward, it will drive the sliding column above it to rise simultaneously. When the support frame is fully unfolded, the positioning column and the sliding column are at their extreme positions. At this time, the operator can rotate the hook on the side of the support frame located on the sliding column to hook it onto the sliding column, thereby locking the position of the positioning column and the strut, further enhancing the stability of the ladder truck.

[0018] This utility model has the following beneficial effects:

[0019] In this invention, the locking mechanism allows operators to quickly fold and unfold the ladder car, easily folding it down to avoid oncoming rail vehicles. After the vehicle passes, the support frame can be quickly erected to lock and unfold the ladder car, eliminating the need for cumbersome pushing and advancing processes. This greatly saves time and effort, improves subway construction efficiency, and reduces labor intensity.

[0020] In this invention, the adjustable mechanism allows operators to easily adjust the height of the protective frame. In the initial state, the protective frame is lowered to facilitate entry and exit of the ladder truck. During construction, the protective frame can be flexibly raised to a suitable height according to the operator's height. This not only ensures the convenience of personnel entering and exiting the ladder truck, but also provides effective and suitable construction protection for operators of different heights, thereby improving construction safety and flexibility. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the foldable ladder truck proposed in this utility model;

[0022] Figure 2 This is a cross-sectional view and a partially enlarged structural schematic diagram of the foldable ladder cart placement frame proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the support frame and a portion of the enlarged structure of the foldable ladder truck proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the raised protective frame and partially enlarged structure of the foldable ladder truck proposed in this utility model.

[0025] In the diagram: 1. Base frame; 2. Support frame; 3. Platform; 4. Track wheel; 5. Placement frame; 6. Pin; 7. Connecting frame; 8. Slide rod; 9. Spring 1; 10. Button; 11. Positioning post 1; 12. Toggle block 1; 13. Positioning post 2; 14. Toggle block 2; 15. Slide rod; 16. Hook frame; 17. Support rod; 18. Support column; 19. Sleeve; 20. Protective frame; 21. Positioning hole; 22. Fixing frame; 23. Button frame; 24. Pin; 25. Spring 2. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1

[0028] Reference Figure 1-4Ladder car, including:

[0029] The base frame 1, support frame 2, and protective frame 20 are provided. Two support frames 2 are symmetrically hinged on the top two sides of the base frame 1. The top of the two support frames 2 is hinged to the same platform 3. The base frame 1 is equipped with a locking mechanism, and the platform 3 is equipped with an adjustment mechanism.

[0030] The locking mechanism is used to lock and unlock the two support frames 2, facilitating their folding and support. This locking mechanism includes a placement frame 5 fixed inside the base frame 1. Pins 6 are slidably mounted on both sides of the placement frame 5, and the pins 6 can be disengaged from and inserted into the side of the support frame 2 (the side of the support frame 2 has holes for the pins 6 to be inserted). Two connecting frames 7 are symmetrically slidably mounted inside the placement frame 5. Two pins 6 on the same side are fixedly connected to the connecting frame 7 on the same side. Press blocks 10 are also slidably mounted on both sides of the placement frame 5, and the inner sides of the two press blocks 10 are fixedly connected to the two connecting frames 7 respectively. A sliding rod 8 is fixed inside one of the connecting frames 7, and the other end of the sliding rod 8 is slidably mounted on one side of the other connecting frame 7. A spring 9 is sleeved on the outside of the sliding rod 8, and both ends of the spring 9 are respectively connected to… The spring seat is fixedly connected to the side of the two connecting brackets 7 that are close to each other. When the support frame 2 needs to be folded, the operator squeezes the two buttons 10 by hand, causing the two buttons 10 to move to the side that is close to each other. This, in turn, causes the two connecting brackets 7 to move to the side that is close to each other. At the same time, the two connecting brackets 7 move, causing the pin 6 to move to the side that is close to each other, so that it is disengaged from the side of the support frame 2. Then, the two support frames 2 are rotated to be laid down. When the two support frames 2 need to be raised, the two buttons 10 are pressed to retract the pin 6. Then, the two support frames 2 are raised and the buttons 10 are released. At this time, the spring 9 pushes the two connecting brackets 7 to the side that is far away from each other through its own elasticity, thereby pushing the pin 6 out of the side of the support frame 2 to complete the locking.

[0031] The adjustment mechanism is used to adjust the height of the protective frame 20. This mechanism includes four rectangular support columns 18 fixed to the top of the platform 3. Each of the four support columns 18 is fitted with a sleeve 19. The protective frame 20 is fixedly mounted on the top of the four sleeves 19. Multiple positioning holes 21 are longitudinally opened on one side of each of the two diagonally opposite support columns 18. A fixing frame 22 is fixedly mounted on one side of each sleeve 19 fitted to the two diagonally opposite support columns 18. A button 23 is hinged to the inner side of the fixing frame 22. A pin 24 is hinged to the inner side of the lower part of the button 23. The pin 24 slides through one side of the sleeve 19 and can disengage and insert into the positioning hole 21. A second spring 25 is fixedly mounted on the inner side of the upper part of the button 23 via a spring seat. The other part of the second spring 25... One end is fixed to one side of the sleeve 19 by a spring seat. When climbing onto the platform 3 and carrying out construction operations for personnel protection, the operator presses one side of the two pushers 23, causing the other side to lift up, thereby driving the pin 24 to disengage from the positioning hole 21. Then, the protective frame 20 is lifted up. When the height of the protective frame 20 reaches the appropriate position, the pushers 23 are released. At this time, the spring 25 pushes the pushers 23 to reset through the elastic principle, thereby driving the pin 24 to insert into the positioning hole 21. When climbing down the folding ladder of the platform 3, the pushers 23 are pressed to disengage the pin 24 from the positioning hole 21. The protective frame 20 is then lowered. When the protective frame 20 is in the initial position, that is, when the protective frame 20 is in the initial state and has not been raised, it is convenient for workers to get out and in from the ladder.

[0032] This application can be used in the field of foldable ladder truck technology, or in other fields applicable to this application.

[0033] Example 2

[0034] Based on Embodiment 1, Embodiment 2 further includes: a foldable ladder cart, which is applied to the field of foldable ladder cart technology. Positioning posts 2nd generation 13 are fixedly installed on the upper sides of both sides of the two support frames 2. Multiple positioning posts 2nd generation 13 have rotatably mounted lever blocks 2nd generation 14 on their inner sides. Positioning posts 1st generation 11 are slidably installed on the lower sides of both sides of the two support frames 2. Multiple positioning posts 1st generation 11 have rotatably mounted lever blocks 12 on their inner sides. Loops are fitted around the outer sides of positioning posts 2nd generation 13 and positioning posts 1st generation 11 on the same side. A common support rod 17 is fixedly installed between two diagonally opposite loops. The two support rods 17 on the same side are hinged together. Multiple... Each of the positioning posts 11 has a fixed sliding post 15 on one side. Each of the two support frames 2 has a hook 16 rotatably mounted on one side of the sliding post 15. When the two support frames 2 are unfolded, the support rod 17 drives the positioning post 11 below to move upward. As the positioning post 11 moves upward, the sliding post 15 above it rises synchronously. When the support frame 2 is fully unfolded, the positioning post 11 and the sliding post 15 are at their extreme positions. At this time, the hook 16 is rotated to hook the sliding post 15, thereby locking the position of the positioning post 11 and the support rod 17, further enhancing the stability of the ladder truck. When the ladder truck is folded, the hook 16 is rotated to disengage it from the sliding post 15.

[0035] In addition, four track wheels 4 are arranged in a rectangular shape on both sides of the base frame 1 to facilitate the movement of the ladder car on the track.

[0036] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A foldable ladder cart, characterized in that, include: The base frame (1) and the protective frame (20) are provided with two support frames (2) symmetrically hinged on the top two sides of the base frame (1), and the top of the two support frames (2) are hinged to the same platform (3); The base frame (1) is provided with a locking mechanism, which is used to lock and unlock the two support frames (2) to facilitate the folding and support of the support frames (2). The platform (3) is provided with an adjustment mechanism, which is used to adjust the height of the protective frame (20).

2. The foldable ladder cart according to claim 1, characterized in that, The locking mechanism includes a placement frame (5) fixedly installed inside the base frame (1). Pins (6) are slidably installed on both sides of the placement frame (5). The pins (6) can be disengaged and inserted into the side of the support frame (2). Two connecting frames (7) are symmetrically slidably installed inside the placement frame (5). The two pins (6) on the same side are fixedly connected to the connecting frames (7) on the same side. Press blocks (10) are slidably installed on both sides of the placement frame (5). The inner sides of the two press blocks (10) are fixedly connected to the two connecting frames (7) respectively. A slide rod (8) is fixedly installed on the inner side of one of the connecting frames (7). The other end of the slide rod (8) is slidably installed on one side of the other connecting frame (7). A spring (9) is sleeved on the outside of the slide rod (8). The two ends of the spring (9) are fixedly connected to the side of the two connecting frames (7) that are close to each other through spring seats.

3. The foldable ladder cart according to claim 1, characterized in that, The adjustment mechanism includes four rectangular support columns (18) fixedly mounted on the top of the platform (3). Each of the four support columns (18) is fitted with a sleeve (19). The protective frame (20) is fixedly mounted on the top of the four sleeves (19). Each of the two support columns (18) located on opposite sides has multiple positioning holes (21) longitudinally opened on one side. Each of the sleeves (19) fitted on the two support columns (18) located on opposite sides is fixedly mounted with a fixing frame (22). The fixing frame (22) is hinged to the inner side with a button (23). The button (23) is hinged to the inner side below with a pin (24). The pin (24) slides through one side of the sleeve (19) and can be disengaged and inserted into the positioning hole (21). The inner side above the button (23) is fixedly mounted with a spring (25) through a spring seat. The other end of the spring (25) is fixedly mounted to one side of the sleeve (19) through a spring seat.

4. The foldable ladder cart according to claim 1, characterized in that, Positioning pins 2 (13) are fixedly installed on the upper sides of both of the two support frames (2). A lever 2 (14) is rotatably installed on the inner side of multiple positioning pins 2 (13). Positioning pins 1 (11) are slidably installed on the lower sides of both of the two support frames (2). A lever 1 (12) is rotatably installed on the inner side of multiple positioning pins 1 (11). A collar is sleeved on the outside of positioning pins 2 (13) and positioning pins 1 (11) on the same side. The same support rod (17) is fixedly installed between two collars on opposite sides. The two support rods (17) on the same side are hinged together.

5. The foldable ladder cart according to claim 4, characterized in that, Each of the multiple positioning columns (11) located below is fixedly provided with a sliding column (15) on one side, and each of the two support frames (2) is rotatably provided with a hook frame (16) on one side of the sliding column (15).

6. The foldable ladder cart according to claim 1, characterized in that, The base frame (1) has four track wheels (4) arranged in a rectangular shape on both sides.

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