An aerial device

Abstract

The utility model provides a kind of ladder truck, comprising: ladder truck main body;Work platform, work platform is set on ladder truck main body, work platform is used to supply construction personnel aerial work;Ladder board support, ladder board support is provided with climbing ladder, ladder board support is rotatably connected with ladder truck main body, to make ladder board support switch between initial state and expansion state, when ladder board support is in initial state, preset included angle is arranged between ladder board support and ladder truck main body, ladder board support is used to supply construction personnel to climb, when ladder board support is in expansion state, ladder board support and work platform are mutually flush, ladder board support is used to supply construction personnel aerial work.The ladder truck in the utility model solves the technical problem that the working space available for the worker to stand on the ladder truck in the related art is limited.

Description

Technical Field

[0001] This utility model relates to the field of ladder truck technology, specifically to a ladder truck. Background Technology

[0002] A ladder truck, also known as an aerial ladder or escalator, is a device that helps workers climb to a certain height to retrieve goods or reach other heights. It also has other names such as aerial ladder truck or aerial ladder frame. The international standard for aerial ladders is that they have handrails and legs spread apart to ensure structural stability and thus protect the safety of those climbing.

[0003] However, in existing technologies, the structure and function of ladder trucks are relatively simple, and the working space available for workers to stand is limited. When loading or unloading goods or performing equipment maintenance, the ladder truck must be moved frequently to reach the next work position, forcing workers to repeatedly climb up and down. This not only increases labor intensity but also significantly reduces work efficiency and affects the continuity and safety of the overall operation.

[0004] Therefore, existing technologies need further development. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a ladder truck to solve the technical problem of limited working space for workers to stand on in related technologies.

[0006] To achieve the above technical objectives, the present invention adopts the following technical solution: A ladder truck is provided, comprising: a ladder truck body; a work platform, the work platform being mounted on the ladder truck body and used for construction workers to perform high-altitude operations; a ladder support frame, on which a climbing ladder is mounted, the ladder support frame being rotatably connected to the ladder truck body to allow the ladder support frame to switch between an initial state and an extended state. When the ladder support frame is in the initial state, a preset angle is set between the ladder support frame and the ladder truck body, and the ladder support frame is used for construction workers to climb. When the ladder support frame is in the extended state, the ladder support frame and the work platform are flush, and the ladder support frame is used for construction workers to perform high-altitude operations.

[0007] Furthermore, the ladder truck includes: a support rod, which is mounted on the main body of the ladder truck; a sliding seat, which is slidably mounted on the support rod, and a one-way limiting mechanism is provided between the support rod and the sliding seat. The one-way limiting mechanism is used to restrict or release the movement direction of the sliding seat. When the one-way limiting mechanism restricts the movement direction of the sliding seat, the sliding seat can only move in the direction closer to the work platform; and a connecting rod, one end of which is rotatably connected to the ladder plate bracket, and the other end of which is rotatably connected to the sliding seat.

[0008] Furthermore, the one-way limiting mechanism includes: ratchet teeth, which are disposed on the support rod and arranged along the extension direction of the support rod; and a limiting component, which is movably mounted on the sliding seat. When the limiting component is embedded in the ratchet teeth, the one-way limiting mechanism restricts the movement direction of the sliding seat, and the sliding seat can only move in the direction closer to the working platform.

[0009] Furthermore, the sliding seat includes: a mounting hole in which a limiting component is slidably mounted; the mounting hole includes a first mounting hole and a second mounting hole that are interconnected, and a stepped structure is formed between the first mounting hole and the second mounting hole; an elastic element that is sleeved on the limiting component, one end of the elastic element abutting against the stepped structure, and the other end of the elastic element abutting against a first limiting portion on the limiting component; and a second limiting portion that is formed at the end of the limiting component away from the support rod, and the second limiting portion abutting against the end of the sliding seat away from the support rod.

[0010] Furthermore, the limiting component also includes a third limiting part, which protrudes from the outer peripheral surface of the limiting component. The first mounting hole is located at the end of the second mounting hole away from the support rod. A clearance channel is provided in the first mounting hole corresponding to the third limiting part. When the one-way limiting mechanism releases the restriction on the movement direction of the sliding seat, the third limiting part abuts against the end of the sliding seat away from the support rod.

[0011] Furthermore, the limiting component includes a first rod and a second rod connected to each other. The end of the first rod near the support rod is disposed in contact with the ratchet. The end of the first rod away from the support rod is connected to the second rod. The outer diameter of the first rod is larger than the outer diameter of the second rod. The connection between the first rod and the second rod forms a first limiting part. Furthermore, a first hinge seat is provided on the periphery of the work platform, and a second hinge seat is provided at the end of the ladder plate bracket near the work platform. The first hinge seat and the second hinge seat are rotatably connected.

[0012] Furthermore, the ladder support has a protective state connected to the main body of the ladder truck. When the ladder support is in the protective state, it is perpendicular to the working platform and is used to protect construction workers when they are working at height.

[0013] Furthermore, the main body of the ladder truck includes a base, one end of a support rod is connected to the work platform, and the other end of the support rod is connected to the base.

[0014] Furthermore, the ladder plate support includes multiple ladder plate supports arranged around the perimeter of the ladder vehicle. Beneficial effects: In this embodiment of the ladder truck, by designing the ladder plate bracket as a convertible structure that is rotatably connected to the main body of the ladder truck, it can be used as a climbing passage in the initial state and form an extended working surface flush with the work platform in the extended state. This maximizes the multi-functionality and space utilization of the ladder truck and solves the technical problem of limited working space for workers to stand in the ladder truck in related technologies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the ladder truck in its initial state as used in an embodiment of this utility model; Figure 2 This is a schematic diagram of the ladder truck in its extended state as used in an embodiment of this utility model; Figure 3 This is a top view of the ladder truck in its extended state as used in this embodiment of the utility model; Figure 4 yes Figure 3 AA section view in the middle; Figure 5 yes Figure 4 An enlarged view of point B in the image; Figure 6 This is a schematic diagram of the structure of the unidirectional limiting mechanism of the ladder car used in this embodiment of the utility model when it releases the restriction on the sliding seat; Figure 7 This is a schematic diagram of the sliding seat of the ladder cart used in an embodiment of this utility model; Figure 8 This is a schematic diagram of the structure of the limiting component of the ladder truck used in this embodiment of the utility model; Figure 9 This is a schematic diagram of the ladder truck in a protected state as used in an embodiment of this utility model.

[0016] The above figures include the following reference numerals: 1. Ladder car body; 11. Support rod; 111. Ratchet; 12. Base; 2. Working platform; 3. Ladder plate bracket; 31. Climbing ladder; 4. Sliding seat; 41. Limiting component; 411. First limiting part; 412. Second limiting part; 413. Third limiting part; 414. First rod body; 415. Second rod body; 421. First mounting hole; 422. Second mounting hole; 423. Clearance passage; 43. Elastic element; 5. Connecting rod; 61. First hinge seat; 62. Second hinge seat. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0018] According to an embodiment of this utility model, a ladder cart is provided; please refer to [link / reference]. Figures 1 to 9 ,include: The system comprises: a ladder truck body 1; a work platform 2 mounted on the ladder truck body 1 for use by construction workers for high-altitude operations; and a ladder support 3 equipped with a climbing ladder 31, which is rotatably connected to the ladder truck body 1 to allow the ladder support 3 to switch between an initial state and an extended state. In the initial state, the ladder support 3 and the ladder truck body 1 are at a preset angle, and the ladder support 3 is used for climbing by construction workers. In the extended state, the ladder support 3 and the work platform 2 are level, and the ladder support 3 is used for high-altitude operations by construction workers.

[0019] Specifically, the ladder truck body 1 serves as the load-bearing foundation for the entire ladder truck, supporting and fixing the work platform 2 and the ladder plate bracket 3. The bottom of the ladder truck body 1 is equipped with traveling wheels and locking devices, which facilitates the flexible movement and reliable fixation of the equipment within the work area, preventing displacement during high-altitude operations.

[0020] Specifically, the work platform 2 is set on top of the ladder truck body 1, serving as the main standing area for construction workers to perform high-altitude operations. The work platform 2 is fixed to the ladder truck body 1 by welding or bolting.

[0021] The ladder plate bracket 3 is rotatably connected to the ladder car body 1, allowing it to switch between the initial state and the extended state. (See also...) Figure 1 In its initial state, the ladder support 3 and the ladder vehicle body 1 form a preset angle. This angle design ensures that the climbing ladder 31 has a tilt angle that meets safety regulations, facilitating the safe climbing of construction personnel to the work platform 2 along the ladder support 3. The climbing ladder 31 is integrated into the ladder support 3, with uniform step spacing and a robust structure, meeting the functional requirements for personnel to move up and down. Figure 1 In the middle, the ladder support 3 is provided with multiple horizontal bars arranged at intervals, and the multiple horizontal bars form a climbing ladder 31. The rotational connection structure between the ladder support 3 and the ladder car body 1 is realized through a hinge shaft, and the ladder support 3 rotates around a fixed axis to complete the state transition.

[0022] When construction workers complete the climb and need to perform large-scale high-altitude operations, the ladder support 3 can be converted from its initial state to its extended state. See also Figure 2 In this state, the ladder support 3 rotates around its rotational connection point with the ladder truck body 1 until its upper surface is flush with the upper surface of the work platform 2, forming a continuous, height-free extended working surface. In this state, the ladder support 3 is no longer used as a climbing passage, but as an extension of the work platform 2, allowing construction workers to stand and move, thereby significantly increasing the working area and avoiding frequent movement of the ladder truck due to limited working range.

[0023] In this embodiment of the ladder truck, the ladder plate bracket 3 is designed as a convertible structure that is rotatably connected to the ladder truck body 1. In its initial state, it is used as a climbing passage, and in its extended state, it is flush with the work platform 2 to form an extended working surface. This maximizes the multi-functionality and space utilization of the ladder truck and effectively solves the existing problem in related technologies where the working space available for workers to stand on the ladder truck is limited, leading to frequent movement of the ladder truck and repeated climbing during operation, resulting in low work efficiency and high labor intensity. Through state switching, construction workers can obtain a larger working range without moving the ladder truck, improving the continuity of operation and work efficiency, and solving the technical problem of limited working space available for workers to stand on the ladder truck in related technologies.

[0024] In the ladder car of this embodiment, see Figure 4 The ladder truck includes: a support rod 11, which is mounted on the main body 1 of the ladder truck; a sliding seat 4, which is slidably mounted on the support rod 11, and a one-way limiting mechanism is provided between the support rod 11 and the sliding seat 4. The one-way limiting mechanism is used to restrict or release the movement direction of the sliding seat 4. When the one-way limiting mechanism restricts the movement direction of the sliding seat 4, the sliding seat 4 can only move in the direction closer to the working platform 2; and a connecting rod 5, one end of which is rotatably connected to the ladder plate bracket 3, and the other end of which is rotatably connected to the sliding seat 4.

[0025] In this embodiment of the ladder truck, the support rod 11 is mounted on the main body 1 of the ladder truck, serving as a guide and load-bearing component, providing a stable movement path and structural support for the movement of the sliding seat 4. The sliding seat 4 is slidably mounted on the support rod 11 and can reciprocate along the extension direction of the support rod 11. Its movement is controlled by a one-way limiting mechanism disposed between the support rod 11 and the sliding seat 4. When the one-way limiting mechanism restricts the movement direction of the sliding seat 4, the sliding seat 4 can only move towards the working platform 2 and cannot retract away from the working platform 2. This function ensures that the sliding seat 4 remains locked in position during the force-driven propulsion process, preventing accidental slippage due to gravity or external forces, and ensuring the safety and controllability of the structural movement.

[0026] One end of the connecting rod 5 is rotatably connected to the ladder plate bracket 3, and the other end is rotatably connected to the sliding seat 4, forming a linkage transmission structure. When the sliding seat 4 moves along the support rod 11 towards the working platform 2, the linkage action of the connecting rod 5 pushes the ladder plate bracket 3 to rotate around its rotational connection point with the ladder car body 1, thereby realizing the transformation of the ladder plate bracket 3 from the initial state to the extended state. Since the one-way limiting mechanism restricts the reverse movement of the sliding seat 4, this linkage structure can maintain self-locking after the ladder plate bracket 3 is extended into place, preventing accidental slippage due to gravity or external force, and maintaining the stability of the extended state without the need for an additional locking device.

[0027] When it is necessary to restore the ladder support 3 to its initial state, the operator can manually release the restriction of the one-way limit mechanism on the sliding seat 4, so that the sliding seat 4 can slide along the support rod 11 away from the working platform 2 under the action of external force. At this time, the connecting rod 5 moves accordingly, and the ladder support 3 rotates back to the initial tilt position, restoring the climbing function.

[0028] In the ladder truck of this embodiment, the linear motion of the sliding seat 4 is converted into the rotational motion of the ladder plate support 3 via the connecting rod 5 through the unidirectional controllable movement of the sliding seat 4. This realizes the smooth switching of the ladder plate support 3 between the initial state and the extended state. The unidirectional limit mechanism ensures the anti-misoperation and self-locking functions during the state transition process, which significantly improves the safety and stability of the ladder truck in high-altitude operations and effectively solves the technical problem of the single function of traditional ladder trucks.

[0029] In the ladder car of this embodiment, see Figure 5-6 The one-way limiting mechanism includes: a ratchet 111, which is disposed on the support rod 11 and arranged along the extension direction of the support rod 11; and a limiting component 41, which is movably mounted on the sliding seat 4. When the limiting component 41 is embedded in the ratchet 111, the one-way limiting mechanism restricts the movement direction of the sliding seat 4, and the sliding seat 4 can only move in the direction closer to the working platform 2.

[0030] Specifically, the sliding seat 4 has a ratchet channel inside, and the limiting component 41 is movably installed on the sliding seat 4, which can extend into the ratchet channel or retract into the sliding seat 4.

[0031] Specifically, the ratchet 111 is arranged continuously or at equal intervals along the extension direction of the support rod 11, providing multiple lockable positions, which enables the sliding seat 4 to achieve multi-level positioning within the stroke range, enhancing the structural adjustment flexibility and adapting to different operational needs.

[0032] See Figure 5A mechanical one-way locking structure is constructed by setting ratchet teeth 111 arranged along the length of the support rod 11 and movably mounting a limiting component 41 on the sliding seat 4 that can engage or disengage from the ratchet teeth 111. When the sliding seat 4 moves along the support rod 11 towards the working platform 2 under the action of thrust, the head of the limiting component 41 can slide along the inclined surface of the ratchet teeth 111 and cross over each tooth, achieving smooth advancement; while when the sliding seat 4 attempts to move in the opposite direction, i.e. away from the working platform 2, the end of the limiting component 41 will abut against the vertical tooth surface of the ratchet teeth 111, forming a rigid block to prevent it from sliding in the opposite direction. This structure utilizes the mechanical meshing principle to achieve reliable one-way motion control, ensuring that the sliding seat 4 will not retract due to external force or gravity during the process of pushing the ladder support 3 to unfold, thus ensuring the stability and safety of state transition.

[0033] See Figure 6 When the limiting component 41 disengages from the ratchet 111, the one-way limiting mechanism releases the restriction on the movement direction of the sliding seat 4, allowing the sliding seat 4 to move toward or away from the work platform 2, facilitating the rotation of the ladder support 3 back to its initial tilt position and restoring the climbing function.

[0034] By setting a one-way limiting mechanism consisting of ratchet 111 and limiting component 41, reliable one-way control of the moving direction of sliding seat 4 is achieved, effectively preventing it from accidentally sliding back during the process of pushing the ladder support 3 to unfold, and ensuring the stability of the linkage mechanism and the safety of operation.

[0035] In some embodiments, the angle of the ladder support 3 can be visually estimated to switch between different working states. Alternatively, a positioning structure can be added to position different working positions. For example, a spring pin structure can be added to the sliding seat, and multiple positioning holes can be set on the support rod 11 corresponding to different working positions. The sliding seat can be reliably positioned at a specified position by the cooperation of the spring pin and the corresponding positioning hole, thereby meeting the positioning requirements of the ladder support in different unfolded states.

[0036] In the ladder car of this embodiment, see Figure 5-6 The sliding seat 4 includes: a mounting hole in which a limiting component 41 is slidably mounted; the mounting hole includes a first mounting hole 421 and a second mounting hole 422 that are interconnected, and a stepped structure is formed between the first mounting hole 421 and the second mounting hole 422; an elastic member 43 that is sleeved on the limiting component 41, one end of the elastic member 43 abutting against the stepped structure, and the other end of the elastic member 43 abutting against the first limiting portion 411 on the limiting component 41; and a second limiting portion 412 that is formed at the end of the limiting component 41 away from the support rod 11, and the second limiting portion 412 abutting against the end of the sliding seat 4 away from the support rod 11.

[0037] By designing the mounting holes as interconnected first mounting hole 421 and second mounting hole 422, and setting a stepped structure between them, a reliable limiting reference is provided for the installation and positioning of the elastic element 43. The stepped structure, as one end support surface of the elastic element 43, can effectively transmit elastic force and prevent the elastic element 43 from shifting or falling off during compression or extension, ensuring that the reciprocating motion of the limiting component 41 in the sliding seat 4 has good guidance and repeatability.

[0038] The elastic element 43 is sleeved on the limiting member 41, with one end abutting against the stepped structure and the other end abutting against the first limiting part 411 on the limiting member 41, forming a pre-compressed elastic pre-tightened state. This pre-tightening force drives the limiting member 41 to always tend to move towards the support rod 11, ensuring that its end can reliably engage in the tooth groove of the ratchet 111, achieving effective engagement when the one-way limiting mechanism is in action. When the sliding seat 4 moves forward, the limiting member 41 overcomes the elastic force of the elastic element 43 and slides along the inclined plane, crossing each tooth one by one; when a reverse movement tendency occurs, the restoring force of the elastic element 43 further enhances the contact pressure between the limiting member 41 and the ratchet 111, improving locking reliability and preventing tooth dislodgement failure due to vibration or impact.

[0039] The second limiting part 412 is formed at the end of the limiting member 41 away from the support rod 11 and abuts against the end of the sliding seat 4 away from the support rod 11. This structure mechanically limits the maximum extension position of the limiting member 41 to prevent it from moving outward excessively under the action of the elastic member 43 and disengaging from the sliding seat 4, thus ensuring that the limiting member 41 is always within the designed stroke during the movement.

[0040] In the ladder car of this embodiment, see Figure 5-8 The limiting component 41 also includes a third limiting part 413, which protrudes from the outer peripheral surface of the limiting component 41. The first mounting hole 421 is located at the end of the second mounting hole 422 away from the support rod 11. A clearance channel 423 is provided in the first mounting hole 421 corresponding to the third limiting part 413. When the one-way limiting mechanism releases the restriction on the movement direction of the sliding seat 4, the third limiting part 413 abuts against the end of the sliding seat 4 away from the support rod 11.

[0041] Specifically, the third limiting part 413 is an elongated boss protruding from the outer peripheral surface of the limiting member 41, and there are two third limiting parts 413, which are arranged opposite to each other. The shape of the avoidance channel 423 corresponds to the third limiting part.

[0042] By providing a protruding third limiting part 413 on the outer peripheral surface of the limiting part 41 and providing an avoidance channel 423 at the corresponding position of the first mounting hole 421, the avoidance channel 423 allows the limiting part 41 to move axially along the mounting hole.

[0043] When the operator applies external force to release the one-way limiting function, the elastic element 43 needs to be compressed to move the limiting component 41 away from the support rod 11. At this time, the third limiting part 413 slides along the clearance channel 423. After the third limiting part 413 slides out of the clearance channel 423, the limiting component 41 is rotated so that the third limiting part 413 is offset from the clearance channel 423 by a certain angle, for example, in Figure 7 In this configuration, the third limiting part 413 is perpendicular to the clearance channel 423, causing the end face of the third limiting part 413 to abut against the end of the sliding seat 4 away from the support rod 11, forming a reliable axial limit. This prevents the limiting part 41 from re-entering the mounting hole and keeps the limiting part 41 disengaged from the ratchet 111. This ensures that the limiting part 41 maintains a reliable connection with the sliding seat 4 even in the unlocked state, preventing the limiting part 41 from re-entering the mounting hole and keeping the limiting part 41 disengaged from the ratchet 111.

[0044] In the ladder car of this embodiment, see Figure 5 The limiting component 41 includes a first rod 414 and a second rod 415 connected to each other. The end of the first rod 414 near the support rod 11 is abutted against the ratchet 111. The end of the first rod 414 away from the support rod 11 is connected to the second rod 415. The outer diameter of the first rod 414 is larger than the outer diameter of the second rod 415. The connection between the first rod 414 and the second rod 415 forms a first limiting part 411.

[0045] By designing the limiting component 41 as a stepped structure composed of a first rod 414 and a second rod 415 with different outer diameters, a first limiting part 411 is naturally formed at the connection between the first rod 414 and the second rod 415. The first limiting part 411 serves as the working end face of the elastic member 43 on the limiting component 41, and can reliably withstand the preload applied by the elastic member 43 and effectively transmit the force to the first rod 414, ensuring that its end always has a tendency to be embedded in the groove of the ratchet 111.

[0046] In the ladder car of this embodiment, see Figure 1 The working platform 2 is provided with a first hinge seat 61 on its periphery, and the ladder plate bracket 3 is provided with a second hinge seat 62 at one end near the working platform 2. The first hinge seat 61 and the second hinge seat 62 are rotatably connected.

[0047] By setting a first hinge seat 61 around the working platform 2 and a second hinge seat 62 correspondingly set at the end of the ladder support 3, the two are rotatably connected by a pin or a pivot, so that the ladder support 3 can rotate freely around the hinge axis between the initial state and the extended state, ensuring that its movement is smooth and without interference during the transition from the inclined climbing state to the extended state that is flush with the working platform 2.

[0048] In the ladder car of this embodiment, see Figure 9 The ladder support 3 has a protective state connected to the ladder truck body 1. When the ladder support 3 is in the protective state, it is perpendicular to the work platform 2. The ladder support 3 is used to protect construction workers when they are working at height. By designing the ladder support 3 to be switchable to a protective state perpendicular to the work platform 2, it can be transformed into a physical barrier when not used as a climbing passage or extension platform, forming a partial enclosure structure around the perimeter of the work platform 2. By setting the ladder support 3 in a protective state, it also has a safety protection function when standing vertically, further solving the technical problem of the relatively simple structure and function of the ladder truck.

[0049] In the ladder car of this embodiment, see Figure 1 The ladder truck body 1 includes a base 12, one end of a support rod 11 is connected to the work platform 2, and the other end of the support rod 11 is connected to the base 12. The base 12 is provided to support the support rod 11 and the work platform 2.

[0050] In the ladder car of this embodiment, see Figure 1 The ladder support 3 comprises multiple ladder supports 3 arranged around the perimeter of the ladder truck. By evenly arranging multiple ladder supports 3 around the perimeter of the ladder truck, distributing them circumferentially along the outer perimeter of the working platform 2, the ladder truck's functionality can be expanded in multiple directions. Each ladder support 3 can independently or simultaneously switch between initial, extended, and protective states, allowing construction personnel to climb, expand the working surface, or set up safety protection from different directions according to actual operational needs, significantly improving the ladder truck's operational flexibility and spatial adaptability.

[0051] See Figure 1 When the ladder car is a square ladder car, the ladder plate support 3 includes four, and one ladder plate support 3 is provided on each side of the ladder car body 1.

[0052] Understandably, regardless of whether the ladder support 3 is in its initial climbing state, its protective state as a safety structure, or its extended state flush with the work platform 2, one or all of the ladder support 3 can be flexibly selected for use according to actual operational needs. When all ladder support 3 are in the protective or extended state, ground personnel must operate the limiting components to unlock them and transition back to the initial state. However, when some ladder support 3 are kept in the initial state while the rest are set to the protective or extended state, construction workers can directly use the ladder support 3 in the initial state for climbing, independently completing the work at height without assistance, thus improving operational autonomy and work efficiency.

[0053] The working principle of the ladder truck is as follows: In the initial state, the ladder plate support 3 and the ladder truck body 1 form a preset angle, and the climbing ladder 31 on it allows construction personnel to safely climb to the working platform 2. When it is necessary to expand the working area, the operator pushes the sliding seat 4 to move along the support rod 11 towards the working platform 2, and the ladder plate support 3 rotates upward around the hinge axis between it and the working platform 2, which is formed by the first hinge seat 61 and the second hinge seat 62.

[0054] When the ladder support 3 rotates to be flush with the upper surface of the work platform 2, it enters the "expanded state," forming a continuous, level working surface that increases the standing and movement space for construction workers. During this process, the one-way limit mechanism automatically locks to prevent the sliding seat 4 from moving backward under gravity or external force, thus ensuring that the ladder support 3 remains stably in the expanded position without the need for additional locking devices.

[0055] When the climbing function needs to be restored, the operator manually releases the one-way limit mechanism, allowing the sliding seat 4 to slide in the opposite direction, and the ladder support 3 can then rotate back to its initial tilted state under gravity or manual assistance.

[0056] In addition, the ladder support 3 can also be erected in a "protective state" perpendicular to the work platform 2, serving as a safety railing. Multiple surrounding ladder supports 3 can be flexibly combined into different states as needed to achieve multi-directional operation, protection, and autonomous climbing, thereby improving the safety, efficiency, and flexibility of high-altitude operations.

[0057] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0058] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0059] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0060] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0061] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A ladder cart, characterized in that, include: Ladder car body (1); The work platform (2) is set on the ladder truck body (1) and is used for construction personnel to work at height. A ladder support (3) is provided on the ladder support (3). The ladder support (3) is rotatably connected to the ladder vehicle body (1) so that the ladder support (3) can switch between the initial state and the extended state. When the ladder support (3) is in the initial state, a preset angle is set between the ladder support (3) and the ladder vehicle body (1). The ladder support (3) is used for construction personnel to climb. When the ladder support (3) is in the extended state, the ladder support (3) is flush with the work platform (2). The ladder support (3) is used for construction personnel to work at height.

2. The ladder truck according to claim 1, characterized in that, The ladder car includes: Support rod (11), the support rod (11) is disposed on the ladder car body (1); A sliding seat (4) is slidably mounted on the support rod (11). A one-way limiting mechanism is provided between the support rod (11) and the sliding seat (4). The one-way limiting mechanism is used to restrict or release the movement direction of the sliding seat (4). When the one-way limiting mechanism restricts the movement direction of the sliding seat (4), the sliding seat (4) can only move in the direction closer to the working platform (2). Connecting rod (5), one end of which is rotatably connected to the ladder plate bracket (3), and the other end of which is rotatably connected to the sliding seat (4).

3. The ladder truck according to claim 2, characterized in that, The unidirectional limiting mechanism includes: A ratchet (111) is provided on the support rod (11) and the ratchet (111) is arranged along the extension direction of the support rod (11); The limiting component (41) is movably mounted on the sliding seat (4). When the limiting component (41) is embedded in the ratchet (111), the one-way limiting mechanism restricts the movement direction of the sliding seat (4). The sliding seat (4) can only move towards the working platform (2).

4. The ladder truck according to claim 3, characterized in that, The sliding seat (4) includes: The mounting hole has a slidable limit component (41) installed in it. The mounting hole includes a first mounting hole (421) and a second mounting hole (422) that are interconnected. A stepped structure is formed between the first mounting hole (421) and the second mounting hole (422). An elastic element (43) is sleeved on the limiting member (41). One end of the elastic element (43) abuts against the stepped structure, and the other end of the elastic element (43) abuts against the first limiting part (411) on the limiting member (41). The second limiting part (412) is formed at one end of the limiting member (41) away from the support rod (11), and the second limiting part (412) abuts against one end of the sliding seat (4) away from the support rod (11).

5. The ladder truck according to claim 4, characterized in that, The limiting component (41) further includes a third limiting part (413), which protrudes from the outer peripheral surface of the limiting component (41). The first mounting hole (421) is located at the end of the second mounting hole (422) away from the support rod (11). A clearance channel (423) is provided in the first mounting hole (421) corresponding to the third limiting part (413). When the one-way limiting mechanism releases the restriction on the movement direction of the sliding seat (4), the third limiting part (413) abuts against the end of the sliding seat (4) away from the support rod (11).

6. The ladder truck according to claim 4, characterized in that, The limiting component (41) includes a first rod (414) and a second rod (415) connected to each other. The end of the first rod (414) near the support rod (11) is abutted against the ratchet (111). The end of the first rod (414) away from the support rod (11) is connected to the second rod (415). The outer diameter of the first rod (414) is larger than the outer diameter of the second rod (415). The connection between the first rod (414) and the second rod (415) forms the first limiting part (411).

7. The ladder truck according to claim 1, characterized in that, The working platform (2) is provided with a first hinge seat (61) on its periphery, and the ladder plate bracket (3) is provided with a second hinge seat (62) at one end near the working platform (2). The first hinge seat (61) and the second hinge seat (62) are rotatably connected.

8. The ladder truck according to claim 1, characterized in that, The ladder support (3) has a protective state connected to the ladder vehicle body (1). When the ladder support (3) is in the protective state, the ladder support (3) is perpendicular to the working platform (2). The ladder support (3) is used to protect construction workers when they are working at height.

9. The ladder truck according to claim 2, characterized in that, The ladder car body (1) includes a base (12), one end of the support rod (11) is connected to the working platform (2), and the other end of the support rod (11) is connected to the base (12).

10. The ladder truck according to claim 1, characterized in that, The ladder plate support (3) includes multiple ladder plate supports (3) arranged around the periphery of the ladder vehicle.

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