Aerial work platform truck underframe floating device and aerial work platform truck

Abstract

The application provides a high-altitude operation vehicle chassis floating device and a high-altitude operation vehicle, and relates to the technical field of high-altitude operation vehicles.The high-altitude operation vehicle chassis floating device comprises a chassis main body, a front axle assembly and a rear axle assembly connected with the chassis main body, the rear axle assembly is connected with the chassis main body, a floating mechanism is connected between the front axle assembly and the chassis main body, the floating mechanism comprises a lockable floating oil cylinder, the floating oil cylinder can keep the front axle assembly fixed relative to the chassis main body when being locked, and allow the front axle assembly to swing up and down relative to the chassis main body when being unlocked.The high-altitude operation vehicle chassis floating device of the application controls the vertical movement degree of freedom of the front axle through the lockable floating mechanism, so that the chassis can be switched between the flexible passing mode and the rigid operation mode, thereby simultaneously optimizing the driving adaptability of the vehicle and the stability and safety of the high-altitude operation.

Description

Technical Field

[0001] This application relates to the field of aerial work platform technology, and in particular to an aerial work platform chassis floating device and an aerial work platform. Background Technology

[0002] Aerial work platforms are widely used in construction, power, communications, and industrial equipment maintenance. Their core function is to lift personnel and equipment to high positions using a boom-type mechanical structure to complete complex tasks such as building exterior wall maintenance, power line repair, and installation of large mechanical components. These devices need to operate in various terrain conditions, including flat indoor ground, uneven outdoor roads, slopes, steps, and other complex environments.

[0003] Existing aerial work platforms suffer from significant vehicle swaying and tilting when operating on uneven surfaces. This is due to the fact that the front and rear axles are all connected to the underframe via shafts, and the rear axle has a certain amount of free space, a complex structure, and numerous electro-hydraulic components. Furthermore, the underframe lacks rigidity, leading to poor handling and a risk of rollover. Utility Model Content

[0004] In view of the above problems, this application provides a floating device for the chassis of an aerial work platform and an aerial work platform to solve the problems of insufficient chassis rigidity in complex terrain, which leads to vehicle body swaying, poor operation experience and low safety in the prior art.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] The first aspect of this application provides a floating device for the chassis of an aerial work platform, comprising:

[0007] The underframe main body, and the front axle assembly and rear axle assembly connected to the underframe main body; the rear axle assembly is connected to the underframe main body;

[0008] A floating mechanism is connected between the front axle assembly and the underframe body. The floating mechanism includes a lockable floating cylinder that keeps the front axle assembly fixed relative to the underframe body when locked and allows the front axle assembly to swing up and down relative to the underframe body when unlocked.

[0009] In one possible implementation, the floating mechanism further includes a solenoid valve capable of controlling the locking and unlocking states of the floating cylinder.

[0010] In one possible implementation, the floating cylinder includes a cylinder body and a piston rod that can extend and retract relative to the cylinder body. The cylinder body is fixed to the chassis body along the height direction, and one end of the piston rod is fixedly connected to the front axle assembly.

[0011] When the solenoid valve is energized, the piston rod enters a floating state; when the solenoid valve is de-energized, the piston rod enters a locked state.

[0012] In one possible implementation, the floating cylinder further includes a connecting seat, which is fixedly connected to the cylinder body;

[0013] The base frame is equipped with a fixed seat, which is arranged opposite to the connecting seat along the width direction. The fixed seat and the connecting seat are connected by bolts.

[0014] In one possible implementation, a wedge-shaped fitting structure is provided between the fixed seat and the connecting seat. The wedge-shaped fitting structure includes a boss provided on the fixed seat or the connecting seat, and a groove provided on the other that matches the boss.

[0015] In one possible implementation, the groove has a first surface and a second surface disposed opposite to each other along the height direction; the boss has a third surface and a fourth surface on both sides along the height direction; the third surface can fit into the first surface, and the fourth surface can fit into the second surface.

[0016] In one possible implementation, the boss and the groove extend along the length direction.

[0017] In one possible implementation, the rear axle assembly is rigidly fixed to the underframe body.

[0018] In one possible implementation, the floating device of the aerial work platform chassis also includes a steering mechanism connected to the front axle assembly for steering the front axle assembly.

[0019] A second aspect of this application provides an aerial work platform vehicle, including the aerial work platform vehicle chassis floating device as described above.

[0020] The aerial work platform chassis floating device provided in this application, by incorporating a floating mechanism including a lockable floating cylinder, enables the front axle assembly to operate in two states. When the floating mechanism is locked, the front axle assembly is rigidly connected to the chassis body, forming a stable working platform foundation; when the floating mechanism is unlocked, the front axle assembly can swing up and down along the height direction, giving the chassis the ability to adapt to terrain undulations. By controlling the vertical freedom of the front axle through the lockable floating mechanism, the chassis can switch between a flexible passage mode and a rigid working mode, thereby simultaneously optimizing the vehicle's driving adaptability and the stability and safety of aerial work operations.

[0021] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the aerial work platform underframe floating device and the aerial work platform provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A perspective view of the floating device of the aerial work platform chassis provided in the embodiments of this application;

[0024] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle;

[0025] Figure 3 for Figure 2 A magnified view of a portion of point B in the middle;

[0026] Figure 4 for Figure 3 A three-dimensional view of the boss shown;

[0027] Figure 5 for Figure 3 A perspective view of the groove shown;

[0028] Figure 6 for Figure 1 The image shows a top view of the floating device on the chassis of the aerial work platform.

[0029] Explanation of reference numerals in the attached figures:

[0030] 10. Underframe main body; 11. Fixed seat; 20. Front axle assembly; 30. Rear axle assembly; 40. Floating mechanism; 41. Floating cylinder; 411. Cylinder body; 412. Piston rod; 413. Connecting seat; 42. Solenoid valve; 43. Bolt; 51. Boss; 511. Third surface; 512. Fourth surface; 52. Groove; 521. First surface; 522. Second surface; 60. Steering mechanism; X, Height direction; Y, Width direction; Z, Length direction. Detailed Implementation

[0031] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0032] Secondly, it should be noted that, in the description of the embodiments of this application, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0033] As described in the background section, aerial work platforms in the related technologies suffer from problems such as vehicle body swaying due to insufficient rigidity of the chassis in complex terrain, resulting in a poor operating experience and low safety.

[0034] To address the aforementioned technical problems, this application provides a floating device for the chassis of an aerial work platform and an aerial work platform. The floating device for the chassis of the aerial work platform includes: a chassis body, and a front axle assembly and a rear axle assembly connected to the chassis body; the rear axle assembly is connected to the chassis body; a floating mechanism is connected between the front axle assembly and the chassis body, and the floating mechanism includes a lockable floating cylinder, which can keep the front axle assembly fixed relative to the chassis body when locked, and allow the front axle assembly to swing up and down relative to the chassis body when unlocked.

[0035] The aerial work platform chassis floating device provided in this application, by incorporating a floating mechanism including a lockable floating cylinder, enables the front axle assembly to operate in two states. When the floating mechanism is locked, the front axle assembly is rigidly connected to the chassis body, forming a stable working platform foundation; when the floating mechanism is unlocked, the front axle assembly can swing up and down along the height direction, giving the chassis the ability to adapt to terrain undulations. By controlling the vertical freedom of the front axle through the lockable floating mechanism, the chassis can switch between a flexible passage mode and a rigid working mode, thereby simultaneously optimizing the vehicle's driving adaptability and the stability and safety of aerial work operations.

[0036] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] Please refer to the attached document. Figure 1-6 The first aspect of this application provides a floating device for the chassis of an aerial work platform, comprising:

[0038] The chassis body 10, and the front axle assembly 20 and the rear axle assembly 30 connected to the chassis body 10; the rear axle assembly 30 is connected to the chassis body 10.

[0039] A floating mechanism 40 is connected between the front axle assembly 20 and the underframe body 10. The floating mechanism 40 includes a lockable floating cylinder 41. When locked, the floating cylinder 41 can keep the front axle assembly 20 fixed relative to the underframe body 10, and when unlocked, it allows the front axle assembly 20 to swing up and down relative to the underframe body 10 in the height direction X.

[0040] It should be noted that, please refer to Figure 1 As shown, "height direction X" in the text refers to the height direction of the aerial work platform vehicle, "width direction Y" refers to the width direction of the aerial work platform vehicle, and "length direction Z" refers to the length direction of the aerial work platform vehicle. The height direction X, width direction Y, and length direction Z intersect each other.

[0041] When the floating cylinder 41 is released, the front axle assembly 20 is allowed to swing up and down relative to the chassis body 10. This allows the front axle assembly 20 and its wheels to passively adapt to the terrain when the vehicle passes over uneven surfaces such as potholes and slopes, reducing the impact and bumps transmitted to the chassis body 10 and the upper platform, thereby improving the overall vehicle passability and driving comfort.

[0042] When the vehicle enters the high-altitude operation state, the floating cylinder 41 locks. At this time, the front axle assembly 20 and the underframe body 10 remain fixed and no longer move relative to each other. This allows the front axle assembly 20, rear axle assembly 30, and underframe body 10 to form a highly rigid integral frame, providing an extremely stable base for boom extension, turntable rotation, and personnel operation, effectively suppressing vehicle sway and tilt, and significantly reducing the risk of rollover caused by chassis flexibility.

[0043] The front axle assembly 20 is responsible for steering and load-bearing, while the rear axle assembly 30 is responsible for load-bearing and connected to the underframe body 10. The floating mechanism 40 is specifically responsible for controlling the vertical degree of freedom of the front axle assembly 20. This modular and functionally separated structure makes the system control logic (such as controlling the cylinder lock by turning the solenoid valve on and off) direct and reliable, reducing the potential failure points caused by complex hydraulic or linkage mechanisms.

[0044] The aerial work platform chassis floating device provided in this application, through the setting of a floating mechanism 40 including a lockable floating cylinder 41, enables the front axle assembly 20 to have two working states. When the floating mechanism 40 is locked, the front axle assembly 20 is rigidly connected to the chassis body 10, forming a stable working platform foundation; when the floating mechanism 40 is unlocked, the front axle assembly 20 can swing up and down along the height direction X, giving the chassis the ability to adapt to terrain undulations. By controlling the vertical movement freedom of the front axle through the lockable floating mechanism 40, the chassis can switch between a flexible passage mode and a rigid working mode, thereby simultaneously optimizing the vehicle's driving adaptability and the stability and safety of aerial work.

[0045] In one possible implementation, please see Figure 2 As shown, the floating mechanism 40 also includes a solenoid valve 42, which can control the locking and unlocking states of the floating cylinder 41.

[0046] In this embodiment, a solenoid valve 42 is installed in the floating mechanism 40 to control the locking and unlocking states of the floating cylinder 41. On one hand, the solenoid valve 42, as an electronically controlled switch element, can accurately, quickly, and reliably switch the hydraulic circuit of the floating cylinder 41 through simple energizing / de-energizing commands, thereby controlling the floating cylinder 41 to be locked (oil circuit closed, piston rod fixed) or unlocked (oil circuit connected, piston rod can float freely). This control method has a fast response speed, ensuring that the vehicle can switch instantly and accurately between driving and operating states.

[0047] On the other hand, simplifying the control signal to energizing and de-energizing the solenoid valve 42 allows the entire mode switching control to be directly integrated into the vehicle's central control system or the driver's cab control panel. Operators can switch between the chassis's "rigid" and "flexible" modes with a single button or switch, greatly simplifying the operation process and reducing operational complexity.

[0048] On the other hand, compared with control schemes that may rely on more complex mechanical linkages or multi-way hydraulic valve groups, using a single solenoid valve 42 for core function control results in a simpler structure and fewer components. This reduces the probability of failures caused by wear and jamming of complex mechanical structures, or leakage in hydraulic lines and blockage of valve cores, thereby improving the overall reliability and durability of the floating mechanism 40.

[0049] In one possible implementation, please see Figure 2 As shown, the floating cylinder 41 includes a cylinder body 411 and a piston rod 412 that can extend and retract relative to the cylinder body 411. The cylinder body 411 is fixed to the base frame body 10 along the height direction X, and one end of the piston rod 412 is fixedly connected to the front axle assembly 20.

[0050] When the solenoid valve 42 is energized, the piston rod 412 enters a floating state; when the solenoid valve 42 is de-energized, the piston rod 412 enters a locked state.

[0051] In this embodiment, the cylinder body 411 is fixed to the chassis body 10 along the height direction X, and the piston rod 412 is fixedly connected to the front axle assembly 20. When the floating cylinder 41 is locked, the piston rod 412 is rigidly connected to the cylinder body 411. At this time, the front axle assembly 20 is rigidly connected to the chassis body 10 through the piston rod 412 and the cylinder body 411, and the force flow is direct, ensuring the overall rigidity of the chassis during operation. When the floating cylinder 41 is unlocked, the vertical swing freedom of the front axle assembly 20 is directly converted into the extension and retraction motion of the piston rod 412 relative to the cylinder body 411. The motion relationship is intuitive and efficient.

[0052] The control logic is designed so that "when solenoid valve 42 is energized, piston rod 412 floats; when solenoid valve 42 is de-energized, piston rod 412 locks." In the most critical high-altitude operation state of the aerial work platform, if an electrical system failure occurs (such as power outage or circuit interruption), solenoid valve 42 will automatically cut off the oil circuit due to power failure, causing the floating cylinder 41 to immediately enter the locked state, thereby forcing the front axle assembly 20 to maintain a rigid connection with the underframe body 10. This effectively prevents the risk of instability caused by accidental loss of rigid support during operation, providing fundamental redundancy for operational safety.

[0053] By assigning the "power-on" state to the "floating" mode (adapting to terrain) and the "power-off" state to the "locked" mode (ensuring rigidity during operation), the operator needs to actively provide energy (power on) to switch to the floating state. In the event of any passive power failure, the system automatically returns to the safest rigid locking state. This design reduces the probability of the vehicle operating in an unsafe state due to misoperation or negligence, enhancing the predictability and reliability of the system's behavior.

[0054] In one possible implementation, please see Figure 2 As shown, the floating cylinder 41 also includes a connecting seat 413, which is fixedly connected to the cylinder body 411;

[0055] A fixed seat 11 is provided on the base frame body 10. The fixed seat 11 and the connecting seat 413 are arranged opposite each other along the width direction Y. The fixed seat 11 and the connecting seat 413 are connected by bolts 43.

[0056] In this embodiment, the connecting seat 413 is fixedly connected to the cylinder body 411, and the fixing seat 11 is mounted on the base frame body 10. The fixing seat 11 and the connecting seat 413 are connected by bolts 43. Thus, the floating cylinder assembly (including the cylinder body 411, piston rod 412, and connecting seat 413) and the base frame body 10 are designed as two independent modules. During manufacturing and assembly, the floating cylinder 41 and the connecting seat 413 can be pre-assembled into a complete sub-module, and then installed as a whole onto the fixing seat 11 of the base frame body 10 by bolts 43. This simplifies the assembly process and improves assembly efficiency and accuracy. Furthermore, in subsequent use, if maintenance or replacement of the floating cylinder 41 is required, the entire module can be removed simply by unscrewing the bolts 43, resulting in better maintainability without requiring cutting or welding of the base frame body 10.

[0057] The fixed seat 11 and the connecting seat 413 are positioned opposite each other along the width direction Y and connected by bolts 43, forming an axial fastening method perpendicular to the connecting surface. When the floating cylinder 41 is locked and the device is in a high-altitude operation state, the huge load and torque of the front axle assembly 20 need to be transmitted to the base frame body 10 through the piston rod 412, cylinder 411, connecting seat 413, bolts 43, and fixed seat 11. The bolt connection can generate huge static friction between the contact surfaces of the connecting seat 413 and the fixed seat 11 by applying a high preload, thereby forming a strong, rigid connection without relative movement, ensuring the integrity of the force transmission path and extremely high connection rigidity in the operation state.

[0058] In one possible implementation, please see Figure 2 As shown, a wedge-shaped fitting structure is provided between the fixed base 11 and the connecting base 413. The wedge-shaped fitting structure includes a boss 51 provided on the fixed base 11 or the connecting base 413, and a groove 52 provided on the other that matches the boss 51.

[0059] In this embodiment, a wedge-shaped mating structure comprising a boss 51 and a groove 52 is provided between the fixed seat 11 and the connecting seat 413. When the boss 51 is embedded in the matching groove 52, the two form a tight fit in the width direction Y. This fit firstly provides precise mechanical positioning, ensuring that the connecting seat 413 (along with the entire floating cylinder 41) is accurately positioned relative to the fixed seat 11 (and the base frame body 10) in the horizontal plane (especially in the width direction Y and height direction X). More importantly, when the floating cylinder 41 is locked and the vehicle is in a high-altitude operation state, the horizontal (especially lateral) forces and impacts transmitted from the front axle assembly 20 will attempt to cause the connecting seat 413 to undergo lateral displacement (shear) relative to the fixed seat 11. At this time, the vertical side of the boss 51 and the groove 52 that mates with each other (i.e., the inclined surface of the wedge-shaped structure) can directly bear and transmit these shear forces, transforming the shear load that might have been borne solely by the bolt 43 into compressive stress borne by the large-area metal contact surface, greatly enhancing the shear resistance of the connection.

[0060] When bolt 43 is tightened, connecting seat 413 and fixed seat 11 are pulled together, and boss 51 is fully pressed into groove 52, eliminating the gap between them on the mating surface. This "metal-to-metal" hard contact ensures that, in the locked state, floating cylinder 41 forms a highly rigid mechanical connection with almost no play between connecting seat 413 and base frame body 10. This effectively suppresses any minor deformation or displacement that may occur during high-altitude operations (especially when the turntable rotates), ensuring a gapless and ultra-high rigidity connection during high-altitude operations.

[0061] In one possible implementation, please see Figure 5 As shown, the groove 52 has a first surface 521 and a second surface 522 disposed opposite to each other along the height direction X; please refer to Figure 4 As shown, the boss 51 has a third surface 511 and a fourth surface 512 on both sides along the height direction X; please refer to Figure 3 As shown, the third surface 511 can be attached to the first surface 521, and the fourth surface 512 can be attached to the second surface 522.

[0062] In this embodiment, the mating surfaces of the boss 51 and the groove 52 are designed as two sets of inclined surfaces (the third surface 511 and the first surface 521 are mated, and the fourth surface 512 and the second surface 522 are mated) that are opposite each other along the height direction X and can fit tightly together when locked. When the third surface 511 and the first surface 521, and the fourth surface 512 and the second surface 522 are simultaneously tightly mated, they form a rigid mechanical limit on the boss 51 (and the connecting seat 413 and the floating cylinder 41 connected thereto) in both the vertical and vertical directions along the height direction X. This eliminates any gaps or movement that may occur in the vertical direction between the connecting seat 413 and the fixed seat 11. In the working state where the floating cylinder 41 is locked, regardless of whether the front axle assembly 20 is subjected to upward (such as ground lifting) or downward (such as the vehicle body weight and the working load pressing down) forces, they can be directly and efficiently transmitted to the underframe body 10 through these two sets of mating surfaces, forming a rigid force flow path, thereby ensuring the stability of the working platform.

[0063] In one possible implementation, please see Figure 3 , Figure 4 and Figure 5 As shown, the boss 51 and the groove 52 extend along the length direction Z.

[0064] In this embodiment, during operation or driving, especially when the vehicle is on a slope or when turning or braking, the connection point of the front axle assembly 20 is subjected to a torsional moment about the width direction Y (i.e., the lateral axis) or an overturning force in the longitudinal direction. By designing the boss 51 and the groove 52 to extend along the length direction Z (i.e., the vehicle's longitudinal direction), this extended contact surface can very effectively resist and transmit the torque and force in this direction, preventing relative rotation or misalignment between the connecting seat 413 and the fixed seat 11 in the longitudinal direction, and greatly enhancing the torsional stiffness and stability of the connection point (and thus the entire chassis) in the longitudinal plane.

[0065] Furthermore, by extending the mating surfaces along the length direction Z, the effective bearing area between the third surface 511 / fourth surface 512 and the first surface 521 / second surface 522 is effectively increased. When subjected to the same load (such as the impact force from the front axle assembly 20 or the enormous pressure during operation), the pressure (pressure per unit area) on the contact surface is effectively reduced. This effectively avoids stress concentration, reduces plastic deformation and wear of the contact surface, thereby significantly improving the load-bearing capacity, fatigue life, and long-term reliability of the connection point.

[0066] In one possible implementation, please see Figure 1 As shown, the rear axle assembly 30 is rigidly fixedly connected to the underframe body 10.

[0067] In this embodiment, the rear axle assembly 30 is rigidly fixed to the underframe body 10, which allows the rear axle assembly 30, the underframe body 10, and the onboard working devices (such as turntables and booms) mounted on them to be structurally integrated into a whole. This whole constitutes the rigid foundation and geometric reference of the vehicle in the working state, providing a stable and reliable reference system and anchor point for the floating / locking function switching of the front axle assembly 20.

[0068] On the other hand, any gaps or slight displacements between the rear axle assembly 30 and the underframe body 10 are eliminated. When the floating cylinder 41 is locked and the vehicle is performing aerial work, the quadrilateral frame composed of the front axle assembly 20, the locked floating mechanism 40, the underframe body 10, and the rigidly fixed rear axle assembly 30 is a high-rigidity structure without internal moving joints. This effectively improves the natural frequency and deformation resistance of the entire vehicle (especially the work platform), and can effectively suppress and attenuate the vehicle body sway caused by boom movement, wind force, or slight ground unevenness, providing crucial static and dynamic stability for aerial work.

[0069] On the other hand, the rear axle assembly 30 and the chassis body 10 are rigidly fixedly connected (such as by full welding or high-rigidity fastening). Compared with complex axle connections, swing axles, or structures with multi-links, hydraulic locks, etc., this greatly simplifies the connection structure between the rear axle assembly 30 and the chassis body 10. Structural simplification directly means fewer potential failure points, lower manufacturing costs, and easier maintenance and inspection. At the same time, the direct rigid connection makes the force transmission path shorter and more direct, avoiding stiffness loss and energy dissipation caused by deformation of flexible components such as hinges and bushings, allowing the chassis structure to more efficiently bear and transmit loads from the vehicle and the ground.

[0070] In one possible implementation, the rear axle assembly 30 is welded to the underframe body 10.

[0071] In this embodiment, by welding the rear axle assembly 30 to the underframe body 10, the assembly gaps, micro-slippage (i.e., "free amount") on the contact surface, and the possibility of loosening due to changes in preload or vibration, which are inherent in traditional bolted or hinged connections, are eliminated. The connection point has a stiffness similar to that of the base material, making the rear axle assembly 30 and the underframe body 10 function as a single integral component. This provides reliable bending and torsional stiffness for the entire chassis (especially in the working state where the front axle assembly 20 is locked), effectively ensuring the stability of high-altitude operations. Furthermore, it ensures higher efficiency in force transmission from the rear axle assembly 30 to the underframe body 10. When the vehicle is subjected to complex operating loads, this connection method minimizes structural deformation, maintains the precision of the chassis geometry, and directly improves the overall structural strength and dynamic response characteristics of the machine.

[0072] In one possible implementation, please see Figure 6 As shown, the floating device of the aerial work platform chassis also includes a steering mechanism 60, which is connected to the front axle assembly 20 and is used to drive the front axle assembly 20 to steer.

[0073] In this embodiment, the steering mechanism 60 is configured to drive the front axle assembly 20 to steer, while the vertical swing freedom of the front axle assembly 20 is controlled by an independent floating mechanism 40. This makes the vehicle's steering function mechanically and controllably independent of the chassis's terrain adaptation function (floating) and operational stability function (locking). Regardless of whether the floating cylinder 41 is locked or floating, the steering mechanism 60 can operate independently and normally, ensuring that the vehicle maintains flexible steering capability under any operating conditions.

[0074] In floating mode (driving state), the front axle assembly 20 can swing up and down to adapt to the terrain, and the steering mechanism 60 integrated on it moves accordingly. This ensures that when turning on bumpy roads, the wheels can still maintain good ground contact, the steering operation is smooth, and there is no loss of steering ability or impact due to the wheels being suspended in the air.

[0075] In the locked mode (high-altitude operation state), the front axle assembly 20 is rigidly connected to the underframe body 10. At this time, the steering mechanism 60, front axle assembly 20, underframe body 10, and rear axle assembly 30 form a rigid whole with no relative movement. When making fine-tuning steering or parking steering in this state, the entire chassis acts like a rigid platform, without any lag or swaying caused by loose chassis connections (such as traditional swing axles). Steering operation is precise and stable, providing a solid and interference-free foundation for the high-altitude platform, indirectly ensuring the stability and safety of high-altitude operations.

[0076] This application also provides an aerial work platform vehicle, including the aerial work platform vehicle chassis floating device as described above.

[0077] Since the aerial work platform vehicle in this embodiment includes the aerial work platform vehicle chassis floating device described in any of the above embodiments, the structure and beneficial effects of the aerial work platform vehicle including the aerial work platform vehicle chassis floating device will not be described in detail here.

[0078] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0079] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A floating device for the chassis of an aerial work platform, characterized in that, include: The underframe body, and a front axle assembly and a rear axle assembly connected to the underframe body; the rear axle assembly is connected to the underframe body; A floating mechanism is connected between the front axle assembly and the underframe body. The floating mechanism includes a lockable floating cylinder that, when locked, keeps the front axle assembly fixed relative to the underframe body, and when unlocked, allows the front axle assembly to swing up and down relative to the underframe body.

2. The floating device for the chassis of the aerial work platform according to claim 1, characterized in that, The floating mechanism also includes a solenoid valve, which can control the locking and unlocking states of the floating cylinder.

3. The floating device for the chassis of the aerial work platform according to claim 2, characterized in that, The floating cylinder includes a cylinder body and a piston rod that can extend and retract relative to the cylinder body. The cylinder body is fixed to the chassis body along the height direction, and one end of the piston rod is fixedly connected to the front axle assembly. When the solenoid valve is energized, the piston rod enters a floating state; when the solenoid valve is de-energized, the piston rod enters a locked state.

4. The floating device for the chassis of the aerial work platform according to claim 3, characterized in that, The floating cylinder also includes a connecting seat, which is fixedly connected to the cylinder body; The base frame is provided with a fixed seat, and the fixed seat and the connecting seat are arranged opposite to each other along the width direction. The fixed seat and the connecting seat are connected by bolts.

5. The floating device for the chassis of the aerial work platform according to claim 4, characterized in that, A wedge-shaped fitting structure is provided between the fixed seat and the connecting seat. The wedge-shaped fitting structure includes a boss provided on the fixed seat or the connecting seat, and a groove provided on the other that matches the boss.

6. The floating device for the chassis of the aerial work platform according to claim 5, characterized in that, The groove has a first surface and a second surface that are arranged opposite each other along the height direction; the boss has a third surface and a fourth surface on both sides along the height direction; the third surface can fit into the first surface, and the fourth surface can fit into the second surface.

7. The floating device for the chassis of an aerial work platform according to claim 5, characterized in that, The boss and the groove extend along the length direction.

8. The floating device for the chassis of an aerial work platform according to claim 1, characterized in that, The rear axle assembly is rigidly fixedly connected to the underframe body.

9. The floating device for the chassis of an aerial work platform according to any one of claims 1-8, characterized in that, The floating device of the aerial work platform chassis also includes a steering mechanism, which is connected to the front axle assembly and is used to drive the front axle assembly to steer.

10. An aerial work platform vehicle, characterized in that, Includes the aerial work platform underframe floating device as described in any one of claims 1 to 9 above.

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