Foldable ladder handrail device for vehicle

Abstract

A foldable boarding ladder handrail device for a vehicle comprises a mounting support unit which is composed of a plurality of mounting support single bodies fixed to boarding ladder side plates, and at least one mounting support single body is provided with a plug pin hole; the vertical pipe unit comprises a plurality of vertical pipe single bodies, one end of each vertical pipe single body is rotationally connected with the mounting support single body, and at least one vertical pipe single body is provided with a limiting hole and a locking bolt; the handrail pipe is rotationally connected to the multiple vertical pipe single bodies; in the folding state, the vertical pipe single bodies and the handrail pipes are folded on the ladder side plates; during unfolding, the stand pipe single bodies are overturned upwards, and the locking bolts are inserted into the bolt holes and the limiting holes to achieve fixation. The foldable ladder handrail has the advantages that the problems that a traditional foldable ladder handrail is large in occupied space, insufficient in stability and the like are solved through combination of modular connecting rod arrangement and key locking and buffering structures, rapid folding storage and stable unfolding supporting are achieved, the structure is compact, operation is easy and convenient, and the foldable ladder handrail is suitable for special vehicle ladder climbing scenes; the space is effectively saved; and the operation safety is improved.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle accessory technology, specifically relating to a foldable ladder handrail device for vehicles. Background Technology

[0002] A ladder is an auxiliary device installed on freight vehicles such as large trucks and chassis trucks, or special vehicles such as construction machinery transport vehicles and fire trucks. It provides workers with a stable climbing path, reduces the risk of falls through anti-slip textures and a foldable structure, and ensures the safety of personnel getting on and off the vehicle in complex work environments through details such as anti-slip textures and ergonomic tilt angles. Ladder handrails provide stable support points for workers to grasp during ascent and descent, helping them maintain balance when going up and down stairs or climbing. However, existing vehicle ladder handrails generally suffer from poor safety and space adaptability. Traditional external ladder handrails are fixed to the outside of the vehicle body, not only occupying external space but also posing a risk of falling off during transportation. Furthermore, some folding handrails can only fold the pedals and partial structures, while the main frame still occupies a large space, forcing them to be placed only at the rear of the subframe, unable to adapt to the compact space requirements of the left and right sides.

[0003] Chinese utility model patent CN203145822U discloses a folding handrail for boarding stairs, comprising a handrail, a bend, a first movable rod, a second movable rod, and a threaded sleeve. One end of the first and second movable rods are movably connected to the bend, and the other end is movably connected to the handrail. Threaded sleeves are provided at the connections between the first movable rod and the bend and the handrail. The bend is connected to the boarding stairs. When the handrail is folded, the threaded sleeve is unscrewed, and after extending beyond the connecting piece, the movable rod folds in one direction simultaneously. This utility model folding handrail for boarding stairs is installed on the side of the boarding stairs for easy gripping when boarding, ensuring personnel safety. Loosening the sleeve allows the handrail to be folded, occupying very little height space, and can be stored along with the boarding stairs, making operation convenient and labor-saving. However, the unfolding and folding of this folding handrail requires multiple steps, including screwing the threaded sleeve and folding the movable rod. The unfolding / folding process is cumbersome, the operation is unchanged, and there are problems with poor adaptability and structural redundancy. In addition, some folding handrails require hinges or slide rails to be welded to the side of the ladder, which increases the overall thickness of the ladder and makes it difficult to fit vehicles with limited space above the subframe.

[0004] In view of the above-mentioned existing technology, it is necessary to improve the structure of the foldable stair handrail. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced in this context. Utility Model Content

[0005] The purpose of this utility model is to provide a convenient, durable, and simple foldable ladder handrail device for vehicles. It facilitates the easy unfolding and folding of the ladder handrail through innovative structure and optimized design, improves usage efficiency, solves the problem of large space occupation of ladder handrails for special vehicles, has a wide range of applications, and enhances usage safety.

[0006] The present invention achieves its objective as follows: a foldable ladder handrail device for vehicles, comprising: a mounting support unit including multiple mounting support units fixed to the ladder side plate, and at least one mounting support unit having a mounting support unit pin hole; a riser unit including multiple riser units, one end of each riser unit being disposed within and rotatably connected to its corresponding mounting support unit, at least one riser unit having a riser unit limiting hole adapted to the mounting support pin hole, and a locking pin disposed within the riser unit limiting hole; and a handrail tube rotatably connected to the multiple... The other end of each riser unit is away from the ladder side plate; when the ladder handrail is in the folded state, the multiple riser units and handrail tubes are gathered on the ladder side plate; when the ladder handrail is in the unfolded state, the multiple riser units flip upward relative to the ladder side plate, and the handrail tubes rotate on the riser units and achieve self-positioning for personnel to grip, while the riser unit limiting hole rotates to the position corresponding to the mounting bracket unit pin hole, and the locking pin passes through the mounting bracket unit pin hole and is fitted in the corresponding riser unit limiting hole, thereby realizing the locking and fixing between the riser unit and the corresponding mounting bracket unit.

[0007] In a specific embodiment of this utility model, a mounting support unit hinge hole is further provided on the mounting support unit, and a corresponding riser unit hinge hole is provided at one end of the riser unit along its length. A riser unit hinge shaft is disposed in the riser unit hinge hole. The riser unit hinge shaft passes through the mounting support unit hinge hole and rotates with the corresponding riser unit, thereby realizing the rotational connection between the end of the riser unit and its corresponding mounting support unit.

[0008] In another specific embodiment of this utility model, a plurality of riser connecting grooves are provided on the handrail tube at positions corresponding to the plurality of riser units. The ends of the plurality of riser units in the length direction away from the mounting support unit are inserted into the riser connecting grooves and are hinged to them by a hinge shaft, thereby realizing the rotational connection between the handrail tube and the plurality of riser units.

[0009] In another specific embodiment of this utility model, a fixed bracket is also installed on the ladder side plate. An arc-shaped groove is formed on the fixed bracket. In the folded state, the riser unit is placed in the arc-shaped groove of the fixed bracket in a state parallel to the ladder side plate.

[0010] In another specific embodiment of this utility model, the fixed bracket is characterized in that it is connected to the ladder side plate by welding, riveting or bolting, and its arc-shaped groove surface is provided with a rubber buffer layer to reduce vibration and impact in the folded state.

[0011] In another specific embodiment of this utility model, multiple mounting bracket units are fixedly installed on the ladder side plate by welding, riveting or bolting.

[0012] In a further specific embodiment of this utility model, the handrail tube is made of profile material and the surface is treated with anti-slip material.

[0013] In a further specific embodiment of this utility model, all of the plurality of riser units are made of profiles, the surface is treated with rust prevention, and the end connections are structurally reinforced.

[0014] The beneficial effects of this utility model are as follows: First, by adopting a linkage mechanism composed of a handrail tube, a vertical tube unit, a mounting support unit, and a ladder side plate, and utilizing a locking pin and a fixed bracket, the handrail tube and ladder side plate are parallel when unfolded for easy gripping by the user. When folded, the handrail tube and vertical tube unit are completely retracted into the upper part of the ladder side plate, with a thickness only the size of a double-layer pipe fitting, significantly reducing space occupation. At the same time, the folding action only requires inserting and removing the locking pin and rotating the handrail tube upwards, with an operation time of less than 5 seconds, making it suitable for frequently used special vehicle scenarios (such as rescue vehicles and engineering vehicles). In addition, by setting a mounting support unit pin hole on the mounting support unit, the pin forms a rigid constraint after insertion, preventing the handrail tube from accidentally swinging back due to personnel gripping or vehicle bumps, significantly improving safety. Third, this technical solution effectively optimizes the load-bearing structure and ensures the reliability of use by setting a vertical tube connecting groove on the handrail tube to connect the vertical tube unit. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model in the folded state;

[0016] Figure 2 This is a structural schematic diagram of the present invention in its unfolded state.

[0017] In the diagram: 1. Mounting support unit, 11. Mounting support unit, 111. Mounting support unit pin hole, 112. Mounting support unit hinge hole; 2. Riser unit, 21. Riser unit, 211. Riser unit limiting hole, 212. Riser unit hinge hole, 22. Locking pin, 23. Riser unit hinge shaft; 3. Handrail tube, 31. Riser connecting groove; 4. Ladder side plate; 5. Fixed bracket. Detailed Implementation

[0018] The following will provide a detailed description by way of embodiments. However, the description of the embodiments is not intended to limit the present utility model. Any formal but not substantive equivalent transformations made based on the present utility model concept should be considered within the scope of the present utility model's technical solution.

[0019] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back refer to the current situation. Figure 1 The description pertains to the location and state of the object, and therefore should not be construed as a specific limitation on the technical solution provided by this utility model.

[0020] Please see Figure 1 and Figure 2This utility model relates to a foldable ladder handrail device for vehicles, comprising: a mounting support unit 1, including multiple mounting support units 11 fixed to the ladder side plate 4, and a mounting support unit pin hole 111 provided on at least one mounting support unit 11; a riser unit 2, including multiple riser units 21, one end of each riser unit 21 being disposed in and rotatably connected to its corresponding mounting support unit 11, and a riser unit limiting hole 211 adapted to the mounting support pin hole 111 provided on at least one riser unit 21, and a locking pin 22 disposed in the riser unit limiting hole 211; and a handrail tube 3, which is rotatably connected to the other end of the multiple riser units 21 away from the ladder side plate 4; and a foldable ladder handrail device for vehicles, comprising: a mounting support unit 1, including multiple mounting support units 11 fixed to the ladder side plate 4, and a foldable ladder handrail device for vehicles; and a foldable ladder handrail device for vehicles, including a foldable ladder side plate 4, including multiple mounting support units 11 fixed to the ladder side plate 4, and a foldable ladder handrail device for vehicles, including a foldable ladder side plate 4, including multiple mounting support units 2 ... When the handrail is in the folded state, the aforementioned vertical tube units 21 and handrail tubes 3 are all folded up on the aforementioned ladder side plate 4 in a state parallel to the ladder side plate 4. When the aforementioned ladder handrail is in the unfolded state, the aforementioned vertical tube units 21 can be flipped upward relative to the aforementioned ladder side plate 4, and the vertical tube units 21 can rotate within an angle range of 0° to 90° with the ladder side plate 4. The aforementioned handrail tubes 3 rotate on the vertical tube units 21 and achieve their own positioning for the operator to grip. At the same time, the vertical tube unit limiting hole 211 rotates to the position corresponding to the mounting bracket unit pin hole 111. The aforementioned locking pin 22 passes through the mounting bracket unit pin hole 111 and is fitted in the corresponding vertical tube unit limiting hole 211, thereby realizing the locking and fixing between the vertical tube unit 21 and the corresponding mounting bracket unit 11. This technical solution achieves the folding function through the hinged design of the mounting support unit 1 and the riser unit 2. When the entire handrail is folded up, the riser unit 21 and the handrail tube 3 are parallel to each other and folded into the step side plate 4, significantly reducing space occupation. When unfolded, the riser unit 21 provides vertical support to form a stable frame, and the handrail tube 3 extends obliquely upward for gripping. At the same time, the cooperation between the locking pin 22 and the pin hole 111 of the mounting support unit ensures rigid fixation in the unfolded state. When folding is required, simply pull out the locking pin 22, flip the handrail tube 3 and the riser unit 21 downward, and the aforementioned handrail can be folded up conveniently and efficiently.

[0021] In this embodiment, as Figure 2 As shown in the figure. The number of mounting support units 11 in the mounting support unit 1 is two, and the upper mounting support unit 11 is provided with a mounting support unit pin hole 111. The number of riser units 21 in the riser unit 2 is correspondingly set to two. The riser unit 21 connected to the upper mounting support unit 11 is provided with a riser unit limiting hole 211 and a locking pin 22. Of course, the number of mounting support units 11 and riser units 21 is not limited to this, and those skilled in the art can make corresponding changes according to the actual production situation.

[0022] Furthermore, a mounting support unit hinge hole 112 is provided on the aforementioned mounting support unit 11, and a corresponding riser unit hinge hole 212 is provided at one end of the aforementioned riser unit 21 along its length. A riser unit hinge shaft 23 is disposed in the riser unit hinge hole 212. The aforementioned riser unit hinge shaft 23 passes through the aforementioned mounting support unit hinge hole 112 and rotates with the corresponding riser unit 21, thereby realizing the rotational connection between the end of the aforementioned riser unit 21 and its corresponding mounting support unit 11. Through the rotational connection of the hinge shaft, the rotational connection between the riser unit 21 and the mounting support unit 11 forms a stable rotation fulcrum, while allowing the riser unit 21 to rotate smoothly during folding and unfolding, reducing mechanical wear.

[0023] Please continue reading Figure 1 and Figure 2 Multiple riser connecting grooves 31 are provided on the aforementioned handrail tube 3 at positions corresponding to multiple riser units 21. The ends of the multiple riser units 21, away from the mounting support unit 11 along their length, extend into the aforementioned riser connecting grooves 31 and are hinged to them via a hinge shaft, thereby achieving a rotatable connection between the aforementioned handrail tube 3 and the multiple riser units 21. The setting of the riser connecting grooves 31 allows the handrail tube 3 and the riser units 21 to rotate at multiple angles via the hinge shaft, and the opening width of the riser connecting grooves 31 is adapted to the outer diameter of the riser units 21, ensuring both hinge freedom and limiting lateral displacement to prevent structural misalignment during folding.

[0024] In this embodiment, a fixing bracket 5 is also installed on the aforementioned ladder side plate 4. The fixing bracket 5 has an arc-shaped groove. In the aforementioned folded state, the aforementioned riser unit 21 is placed in the arc-shaped groove of the fixing bracket 5 in a state parallel to the ladder side plate 4. The arc-shaped groove of the fixing bracket 5 provides precise positioning for the riser unit 21 in the folded state, preventing shaking during storage, and the radius of curvature of the arc-shaped groove matches the outer diameter of the riser unit 21.

[0025] Furthermore, the aforementioned fixed bracket 5 is fixed to the ladder side plate 4 by welding, riveting or bolting, etc., and its arc-shaped groove surface can be provided with a rubber buffer layer to reduce vibration and impact in the folded state. The rubber buffer layer absorbs the vibration energy in the folded state through elastic deformation, reduces the noise generated by the collision of metal parts, and ensures the reliability of use.

[0026] Furthermore, multiple of the aforementioned mounting bracket units 11 are fixedly installed on the aforementioned ladder side plate 4 by means of welding, riveting or bolting; ensuring high strength and fatigue resistance of the connection parts, and suitable for high-frequency vibration scenarios during vehicle operation.

[0027] In this embodiment, the aforementioned handrail tube 3 is made of profile material with a non-slip surface treatment. The non-slip layer can increase the coefficient of friction through surface embossing (such as diamond or alligator pattern), enhancing grip safety in rainy or oily environments.

[0028] Preferably, all of the aforementioned riser units 21 are made of profiles, with rust-proof treatment on the surface and structural reinforcement at their end connections.

[0029] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0030] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A foldable ladder handrail device for a vehicle, characterized by comprising: The utility model relates to a kind of ladder handrails, including: One mounting support unit (1) includes multiple mounting support units (11) fixed on ladder side plate (4), and mounting support unit bolt hole (111) is opened in at least one mounting support unit (11);A vertical pipe unit (2) includes multiple vertical pipe units (21), and the end of multiple vertical pipe units (21) is equipped in the corresponding mounting support unit (11) and is realized rotation connection, at least one vertical pipe unit (21) is opened with the vertical pipe unit limiting hole (211) of mounting support bolt hole (111) adaptation, and locking bolt (22) is further equipped in the vertical pipe unit limiting hole (211);A handrail pipe (3), the handrail pipe (3) is rotationally connected in the other end of multiple vertical pipe units (21) away from the ladder side plate (4);When the ladder handrail is in folded state, multiple vertical pipe units (21) and handrail pipe (3) are all folded on the ladder side plate (4) with the state of parallel to ladder side plate (4);When the ladder handrail is in unfolded state, multiple vertical pipe units (21) are flipped upward relative to the ladder side plate (4), and the handrail pipe (3) is rotated on vertical pipe unit (21) and realizes self-positioning for personnel to grip, while vertical pipe unit limiting hole (211) is rotated to the position corresponding to mounting support unit bolt hole (111), the locking bolt (22) passes through mounting support unit bolt hole (111) and is equipped in the corresponding vertical pipe unit limiting hole (211), so as to realize the locking and fixing between vertical pipe unit (21) and the corresponding mounting support unit (11).

2. The foldable ramp handrail device for a vehicle according to claim 1, characterized by: Mounting support unit hinged hole (112) is further opened in the mounting support unit (11), and vertical pipe unit hinged hole (212) is correspondingly opened in the length direction of the end of vertical pipe unit (21), vertical pipe unit hinged shaft (23) is equipped in the vertical pipe unit hinged hole (212), the vertical pipe unit hinged shaft (23) passes through the mounting support unit hinged hole (112) and is rotationally matched with the corresponding vertical pipe unit (21), so as to realize the rotation connection between the end of vertical pipe unit (21) and the corresponding mounting support unit (11).

3. The foldable ramp handrail assembly of claim 1, wherein: Corresponding to the position of multiple vertical pipe units (21), vertical pipe connecting slot-shaped piece (31) is equipped on the handrail pipe (3), and the end of the length direction of multiple vertical pipe units (21) away from mounting support unit (11) is inserted into the vertical pipe connecting slot-shaped piece (31) and is hinged with the hinged shaft, so as to realize the rotation connection between the handrail pipe (3) and multiple vertical pipe units (21).

4. The foldable ramp handrail assembly of claim 1, wherein: Fixed bracket (5) is further installed on the ladder side plate (4), and arc-shaped groove is formed on the fixed bracket (5), in the folded state, the handrail pipe (3) is arranged in the arc-shaped groove of the fixed bracket (5) with the state of parallel to ladder side plate (4).

5. A foldable stairway handrail assembly for a vehicle as defined in claim 4, wherein: The fixed bracket (5) is welded, riveted or bolted to the ladder side plate (4), and the arc-shaped groove surface is provided with a rubber buffer layer for reducing vibration impact in the folded state.

6. The foldable ramp handrail assembly of claim 1, wherein: A plurality of the mounting support units (11) are fixedly mounted on the ladder side plate (4) by welding, riveting or bolting.

7. The foldable ramp handrail assembly of claim 1, wherein: The handrail pipe (3) is made of a profile and the surface is provided with an anti-slip treatment.

8. The foldable ramp handrail assembly of claim 1, wherein: The plurality of vertical pipe units (21) are each made of a profile, the surface is provided with an anti-rust treatment, and the end connection is structurally reinforced.

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