A foldable ladder with a rotating platform

Abstract

The present invention discloses a foldable ladder with a rotating platform, comprising a hatch on a vehicle body and a foldable ladder; fixed rails for the foldable platform are fixedly mounted on both sides of the hatch; movable rails for the foldable platform are mounted on both outer sides of the foldable platform, the movable rails being slidably connected to the fixed rails, and the foldable platform slides forward and backward along the fixed rails via the movable rails; ladder tracks are mounted on both inner sides of the foldable platform; both sides of a small platform pulley are slidably connected to the ladder tracks; the end of the foldable ladder is hinged to the small platform pulley; a ladder rotating mechanism is mounted on the small platform pulley; the small platform pulley is rotatable via the ladder rotating mechanism, thereby driving the foldable ladder to rotate. The present invention can conveniently change the direction of the foldable ladder's extension, adapting to work in a space-constrained environment, thereby improving work efficiency.

Description

Technical Field

[0001] The present application relates to a boarding ladder for special vehicles, and in particular to a retractable folding ladder with a rotating platform. Background Art

[0002] To ensure the passability of mobile command and communication vehicles and broadcast vehicles, large vehicles with high ground clearance are typically used as the vehicle chassis. This height necessitates a ladder. Currently, these ladders are typically either hanging ladders or pull-out ladders. Hanging ladders are lightweight and can be securely hung outside the vehicle or stored in a storage space inside the vehicle when not in use. When in use, they can be removed or hung from a hook under the upper door, facilitating entry. Pull-out ladders utilize a sufficient space reserved beneath the vehicle floor, within which tracks are installed. A sliding trolley guide is incorporated into the front end of the ladder, and rolling bearings are installed on both sides of the ladder to facilitate its extension.

[0003] However, sometimes due to space limitations at the workplace, there is insufficient space to mount a ladder in the width direction of the vehicle body. Therefore, the ladder must be rotated and placed parallel to the length of the vehicle body to facilitate boarding. In response to this need, a retractable folding ladder with a rotating platform was designed to meet the needs of boarding vehicles in various locations. Summary of the Invention

[0004] The purpose of the present invention is to provide a pull-out folding ladder with a rotating platform, which can conveniently change the pulling-out working direction of the pull-out folding ladder, adapt to working in an environment with cramped space, and thus improve work efficiency.

[0005] The technical solution for achieving the purpose of the present invention is: a pull-out folding ladder with a rotating platform, including a cabin hole and a pull-out folding ladder on a vehicle body, and also including a pull-out platform, a pull-out platform moving rail, a pull-out platform fixed rail, a pull-out ladder rotating mechanism, a small platform pulley and a pull-out ladder rail; the pull-out platform fixed rail is fixedly installed on both sides of the cabin hole, the pull-out platform moving rail is installed on both outer sides of the pull-out platform, the pull-out platform moving rail is slidably connected to the pull-out platform fixed rail, and the pull-out platform slides back and forth along the pull-out platform fixed rail through the pull-out platform moving rail; the pull-out ladder rail is installed on both inner sides of the pull-out platform, and both sides of the small platform pulley are slidably connected to the pull-out ladder rail, while the end of the pull-out folding ladder is hinged to the small platform pulley, and the pull-out ladder rotating mechanism is installed on the small platform pulley, and the small platform pulley can rotate through the pull-out ladder rotating mechanism, thereby driving the pull-out folding ladder to rotate.

[0006] Furthermore, a hatch door is installed at the opening of the hatch.

[0007] Furthermore, locking pins are installed on both sides of the opening end of the cabin hole, and pin holes adapted to the locking pins are provided on both sides of the pulling platform, and the pulling platform is locked by inserting the locking pins into the pin holes.

[0008] Furthermore, the locking latch is a spring locking latch.

[0009] Furthermore, vertical support bearings and horizontal positioning bearings are installed on the fixed rails of the pulling platform.

[0010] Furthermore, the end of the drawer-folding ladder is provided with a nylon pad for the footing.

[0011] Furthermore, the pedals of the drawer-folding ladder are made of aluminum plates.

[0012] Furthermore, the drawer ladder rotation mechanism adopts a return spring ball type locking mechanism.

[0013] Furthermore, the drawer ladder rotating mechanism includes an upper plate, a lower plate, a spring, a ball and a rotating shaft. The upper plate and the lower plate are in surface contact, the rotating shaft passes through the center holes of the upper plate and the lower plate, and extends to the center hole of the small platform pulley. The upper plane of the lower plate is evenly distributed with 4 spherical blind holes in the circumferential direction, and the upper plate is provided with 2 symmetrical blind holes, which are adapted to the symmetrical spherical blind holes. Springs and balls are installed in the blind holes, one end of the spring is fixedly connected to the inner wall of the blind hole, and the other end is connected to the ball. The ball is locked in the spherical blind hole under the elastic force of the spring, the upper plate is slidably connected to the drawer ladder track of the drawer platform, and the lower plate is fixedly connected to the small platform pulley. When the lower plate is rotated by external force, the small platform pulley is driven to rotate.

[0014] Furthermore, both sides of the lower plate are connected to the pull-out platform through a rotating mechanism track, the rotating mechanism track is installed inside the pull-out platform, and the pull-out ladder track is installed on the lower side of the pull-out platform.

[0015] Furthermore, lubricating oil is applied between the upper plate and the lower plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging a pull-out folding ladder with a rotating platform in a command and communication vehicle and a television broadcast vehicle, the present invention can rotate the pull-out ladder in a cramped space environment and change the working direction of the pull-out ladder, thereby adapting to the working needs of a small space, and at the same time improving the manufacturing level of the command and communication vehicle and television broadcast vehicle industry; the pedals of the pull-out folding ladder use aluminum plates instead of the previous stainless steel plate structure to reduce the weight of the pedals; vertical bearing supports and horizontal positioning supports are installed on the pull-out platform fixed rails to ensure that the pull-out platform moves smoothly within the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is a schematic diagram of the platform ladder in the folded state.

[0019] Figure 2 This is a schematic diagram of the platform ladder in the pulled-out state.

[0020] Figure 3 This is a schematic diagram of the platform folding ladder in the pulled-out state.

[0021] Figure 4 This is a schematic diagram of the platform folding ladder rotated 90 degrees.

[0022] Figure 5 Cross-section view of the platform folding ladder.

[0023] Figure 6 This is the structural diagram of the rotating mechanism. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] like Figures 1 to 5 As shown, a retractable folding ladder with a rotating platform is used for commanding communication vehicles, TV broadcast vehicles, RVs and other mobile special vehicles, including a cabin 1, a retractable platform 2, a retractable platform moving rail 3, a retractable ladder rotating mechanism 4, a small platform pulley 5, a retractable platform fixed rail 6, a vertical support bearing 7, a horizontal positioning bearing 8, a retractable folding ladder 9, a retractable ladder rail 10, a rotating mechanism rail 11, a locking pin 12, a cabin door 13, etc.

[0026] The vehicle body is provided with a cabin hole 1, and a cabin hole door 13 is provided at the opening of the cabin hole 1. Drawing platform fixed rails 6 are fixedly installed on both sides of the cabin hole 1, and drawing platform moving rails 3 are installed on both sides of the outside of the drawing platform 2. The drawing platform moving rails 3 are connected to the drawing platform fixed rails 6 through vertical support bearings 7, horizontal positioning bearings 8, and the drawing platform 2 as a whole slides back and forth through the drawing platform moving rails 3 under the constraints of the vertical support bearings 7 and horizontal positioning bearings 8 of the drawing platform fixed rails 6, thereby realizing the drawing and pulling movement of the drawing platform 2; locking pins 12 are provided on both sides of the opening of the cabin hole 1, and pin holes adapted to the locking pins 12 are provided on both sides of the drawing platform 2. When the drawing platform 2 is pulled or retracted to the specified position, it is locked by inserting the locking pins 12 into the pin holes.

[0027] The lower part of the pulling platform 2 is provided with symmetrical pulling ladder tracks 10, and the small platform pulley 5 is located below the pulling platform 2. Both sides of the small platform pulley 5 are connected to the pulling ladder tracks 10, and the small platform pulley 5 is provided with a pulling ladder rotating mechanism 4. The rotating mechanism track 11 is inside the pulling platform 2, and both sides of the pulling ladder rotating mechanism 4 are connected to the rotating mechanism track 11, which can move relative to the pulling platform 2. The inner end of the pulling folding ladder 9 is hinged to the end of the small platform pulley 5, and the pulling folding ladder 9, the small platform pulley 5 and the pulling ladder rotating mechanism 4 slide back and forth as a whole relative to the pulling platform 2; when the pulling folding ladder 9 is pulled out to the tail of the cabin hole 1, based on the hinged connection method, the pulling folding ladder 9 can be rotated and lowered, perpendicular to the ground, and the small platform pulley 5 can be rotated through the pulling ladder rotating mechanism 4, thereby driving the pulling folding ladder 9 to rotate, so that the pulling folding ladder 9 rotates from the opening position to the side position.

[0028] The rotating mechanism 4 moves along the rotating mechanism track through the bearings on both sides thereof; the small pulley moves along the extension ladder track through the bearings on both sides thereof.

[0029] Combine Figure 6The rotating mechanism 4 adopts a reset spring ball type locking mechanism, including an upper plate 4-1, a lower plate 4-2, a spring 4-3, a ball 4-4 and a rotating shaft 4-5. The upper plate 4-1 and the lower plate 4-2 are in surface contact. The rotating shaft 4-5 passes through the center holes of the upper plate 4-1 and the lower plate 4-2 and extends to the center hole of the small platform pulley 5. The upper plane of the lower plate 4-2 is evenly distributed with 4 spherical blind holes in the circumferential direction. The upper plate 4-1 corresponds to the circumferential position of the lower plate 4-2. Two symmetrical blind holes are provided, and a spring 4-3 and a ball 4-4 are installed in the blind holes. One end of the spring 4-3 is fixedly connected to the inner wall of the blind hole, and the other end is connected to the ball 4-3. When the lower plate 4-2 is rotated under the action of an external force, the ball 4-4 disengages from the blind hole of the lower plate 4-2. After the lower plate 4-2 rotates 90 degrees, it reaches the position of the other two symmetrical blind holes. Under the action of the elastic potential energy of the return spring, the ball is pushed into the blind hole of the lower plate 4-2 again, and the rotating mechanism is locked again. When it is necessary to rotate the drawer ladder again, as long as an external force exceeding the return spring 4-3 is used to rotate the lower plate 4-2, the locking device of the rotating mechanism 4 can be opened, and the drawer ladder can be rotated using the rotating mechanism. This automatic locking mechanism avoids manual operation and realizes automated operation. The upper plate 4-1 is connected to the drawer ladder rotating mechanism track 11 through a bearing, and the lower plate 4-2 is fixedly connected to the small platform pulley 5.

[0030] The foldable ladder track 10 is shorter than the rotating mechanism track 11. Even after the small platform trolley 5 leaves the track, the rotating mechanism remains connected to the rotating mechanism track 11. At this point, the small platform trolley 5 and the foldable ladder 9 are both kept in motion by the rotating mechanism 4. Manually rotating the foldable ladder 9 90 degrees, the foldable ladder 9 drives the small platform trolley 5, which in turn drives the lower plate 4-2 of the rotating mechanism 90 degrees. After releasing the hand, the elastic potential energy of the return spring pushes the ball bearing back into the blind hole of the lower plate 4-2, locking it in place and thus achieving the desired 90-degree rotation of the rotating ladder.

[0031] Lubricating oil is applied between the upper plate 4-1 and the lower plate 4-2 to reduce sliding friction resistance and increase the service life of metal parts.

[0032] The end of the pull-out folding ladder 9 is provided with a nylon pad for the foot.

[0033] Furthermore, the pedals of the foldable ladder are made of aluminum plates instead of the previous stainless steel plates, which reduces the weight of the pedals.

[0034] The pull-out platform fixed rail is equipped with vertical bearing supports and horizontal positioning supports to ensure smooth movement of the pull-out platform within the rail;

[0035] A fixed rail is installed on the pull-out ladder track 10 of the pull-out platform to make a small pulley, which effectively expands the use space of the platform;

[0036] The rotating mechanism installed on the small pulley can realize the 90-degree rotation of the pull-out folding ladder, which solves the problem of insufficient space in the workplace and inability to carry out work smoothly. At the same time, the rotating mechanism is equipped with a limit locking mechanism to ensure that the rotating pull-out folding ladder works within the allowed angle range;

[0037] This patent adopts a folding ladder to solve the problem of less utilization of the cabin hole space and the storage of the folding ladder.

[0038] The method of using the pull-out folding ladder with a rotating platform is as follows:

[0039] like Figure 2 As shown, when the pull-out ladder is needed, open the hatch door 13, then manually unlock the locking pin 12, and then slowly pull out the pull-out platform 2 assembly with both hands. At this time, the pull-out platform movable rails 3 on both sides of the pull-out platform 2 slowly move out of the hatch 1 along the pull-out platform fixed rails 6.

[0040] like Figure 3 As shown, when the pull-out platform 2 is pulled out to its position, the locking pin 12 is manually operated to lock the pull-out platform 2, the pull-out folding ladder 9 is pulled out to the specified position, and then the pull-out folding ladder 9 is slowly lowered so that the nylon pad at the end of the pull-out folding ladder 9 is placed on the ground, and the pedal of the pull-out folding ladder 9 is opened. The staff can use the pull-out folding ladder 9 to climb the ladder and enter the cabin.

[0041] like Figure 4 As shown, if the space is limited, the pull-out folding ladder 9 can be rotated manually, and the pull-out folding ladder 9 is rotated 90 degrees, driving the small platform pulley 5 to rotate 90 degrees, and then driving the rotating mechanism 4 to rotate from the opening of the cabin hole 1 to the side. After stopping the external force, the pull-out ladder rotating mechanism 4 is locked, the pull-out folding ladder 9 is opened, and the ladder is climbed into the cabin to perform operations.

Claims

1. A foldable ladder with a rotating platform, comprising a hatch (1) on a vehicle body and a foldable ladder (9), characterized in that: It also includes a pulling platform (2), a pulling platform movable rail (3), a pulling platform fixed rail (6), a pulling ladder rotating mechanism (4), a small platform pulley (5) and a pulling ladder rail (10); the pulling platform fixed rail (6) is fixedly installed on both sides of the cabin hole (1), the pulling platform movable rail (3) is installed on both outer sides of the pulling platform (2), the pulling platform movable rail (3) is slidably connected to the pulling platform fixed rail (6), and the pulling platform (2) slides forward and backward along the pulling platform fixed rail (6) through the pulling platform movable rail (3); the pulling ladder rail (10) is installed on both inner sides of the pulling platform (2), and both sides of the small platform pulley (5) are slidably connected to the pulling ladder rail (10), and at the same time, the end of the pulling folding ladder (9) is hinged to the small platform pulley (5), and the pulling ladder rotating mechanism (4) is installed on the small platform pulley (5), and the small platform pulley (5) can rotate through the pulling ladder rotating mechanism (4), thereby driving the pulling folding ladder (9) to rotate; Locking pins (12) are installed on both sides of the opening end of the hatch (1), and pin holes adapted to the locking pins (12) are provided on both sides of the drawer platform (2), and the drawer platform (2) is locked by inserting the locking pins (12) into the pin holes; The locking latch (12) is a spring-loaded locking latch, and the end of the folding ladder (9) is provided with a nylon pad for the foot; The drawer ladder rotation mechanism (4) comprises an upper plate (4-1), a lower plate (4-2), a spring (4-3), a ball (4-4) and a rotation shaft (4-5). The upper plate (4-1) and the lower plate (4-2) are in surface contact. The rotation shaft (4-5) passes through the center holes of the upper plate (4-1) and the lower plate (4-2) and extends into the center hole of the small platform pulley (5). The upper plane of the lower plate (4-2) is evenly distributed with four spherical blind holes in the circumferential direction. The upper plate (4-1) is provided with two symmetrical blind holes. , adapted to two symmetrical spherical blind holes, a spring (4-3) and a ball (4-4) are installed in the blind hole, one end of the spring (4-3) is fixedly connected to the inner wall of the blind hole, and the other end is connected to the ball (4-4), and the ball (4-4) is located in the spherical blind hole under the elastic force of the spring (4-3) for locking, the upper plate (4-1) is connected to the pulling platform (2), and the lower plate (4-2) is fixedly connected to the small platform pulley (5). When the lower plate (4-2) is rotated by external force, the small platform pulley (5) is driven to rotate.

2. The foldable ladder with a rotating platform according to claim 1, characterized in that: A hatch door (13) is installed at the opening of the hatch (1).

3. The foldable ladder with a rotating platform according to claim 1, characterized in that: A vertical support bearing (7) and a horizontal positioning bearing (8) are installed on the drawer platform fixed rail (6).

4. The foldable ladder with a rotating platform according to claim 1, characterized in that: The pedals of the drawer-folding ladder (9) are made of aluminum plates.

5. The foldable ladder with a rotating platform according to claim 1, characterized in that: The drawer ladder rotation mechanism (4) adopts a return spring ball-type locking mechanism.

6. The foldable ladder with a rotating platform according to claim 1, characterized in that: Both sides of the lower plate (4-2) are connected to the drawer platform (2) via a rotating mechanism track (11), the rotating mechanism track (11) is installed inside the drawer platform (2), and the drawer ladder track (10) is installed on the lower side of the drawer platform (2).

7. The foldable ladder with a rotating platform according to claim 1, characterized in that: Lubricating oil is applied between the upper plate (4-1) and the lower plate (4-2).

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