Quick release chassis and fire truck
Patent Information
- Application Number
- CN202510911655.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-02
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2045-07-02
Smart Images
Figure CN120716560B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle loading and unloading technology, and in particular to a chassis and fire truck with a quick loading and unloading mechanism. Background Technology
[0002] In practical applications of fire trucks, the rapid handling and loading / unloading of equipment inside the cargo compartment has a significant impact on the timeliness of emergency rescue. With the increasing frequency of various sudden disasters and accidents, higher demands are being placed on fire response speed and equipment operation efficiency. How to complete the loading, unloading, deployment, and retrieval of fire equipment in a short time has become one of the key factors in improving overall rescue effectiveness.
[0003] Currently, the two most common material handling methods used in the industry are hydraulic tailgate loading and unloading, and hooklift truck transport. However, both methods have certain operational bottlenecks in actual use, making it difficult to fully meet the demands of efficient and rapid practical applications.
[0004] Hydraulic tailgate loading and unloading is a relatively traditional human-machine collaborative operation method. In practice, the equipment box must first be manually moved to the tailgate's support surface. Then, the hydraulic system is activated to raise and lower the tailgate. Finally, the equipment box is manually transferred from the tailgate to the ground or a transport vehicle. This process involves multiple mechanical actions, and each step requires a certain amount of time to switch and execute, resulting in a lengthy overall handling process. In time-sensitive scenarios such as fire rescue, this multi-step, multi-personnel operation method can easily lead to wasted time and affect overall rescue efficiency.
[0005] On the other hand, while hooklift transport offers a degree of automation, its reliance on a robotic arm to grab and release containers necessitates tilting the containers at a certain angle during loading and unloading. This tilting method not only limits the efficient use of space within the container but also poses safety hazards such as equipment slippage or collisions due to changes in the container's angle, compromising the safety and integrity of the transported equipment. Summary of the Invention
[0006] This invention provides a quick-loading and unloading chassis and fire truck to solve the problems of low loading and unloading efficiency, complex operation and safety hazards of fire equipment in the prior art, and realize efficient, safe and stable loading, unloading and transfer of equipment boxes.
[0007] This invention provides a quick-loading and unloading chassis for a box-type vehicle, comprising: a chassis assembly connected to a front axle drive assembly of a vehicle, the front axle drive assembly including front wheels; wherein the chassis assembly includes a beam frame and a boom, the beam frame including longitudinal beams disposed on both sides of the chassis assembly, the boom including rocker arm beams disposed on both sides of the chassis assembly, the middle portion of the rocker arm beams being hinged to the middle portion of the longitudinal beams, and the rear end of the rocker arm beams being provided with rear wheels; an upper body box, the front end and rear end of the upper body box being respectively provided with assembly structures adapted to the front end of the rocker arm beams and the rear end of the longitudinal beams; a hydraulic cylinder is provided between the rocker arm beams and the longitudinal beams, the hydraulic cylinder being used to drive the longitudinal beams and the rocker arm beams to rotate relative to each other, thereby realizing the lifting and lowering action of the upper body box.
[0008] According to one embodiment of the present invention, the beam frame includes a front beam, and the front axle drive assembly is provided with a laterally extending front connecting shaft; the front end of the front beam is hinged to the front connecting shaft, and the rear end of the front beam is rigidly connected to the longitudinal beams on both sides; the rear end of the longitudinal beam is provided with a rear fixing hook, and the rear ends of the upper body are respectively provided with rear fixing pins adapted to the rear fixing hooks of the two longitudinal beams.
[0009] According to one embodiment of the present invention, the boom includes a front fixing rod for connecting the front ends of the two rocker arm beams; the front end of the upper loading box is provided with a front fixing hook for cooperating with the front fixing rod.
[0010] According to one embodiment of the present invention, the number of the front fixing hooks is multiple; the front fixing hooks are C-shaped hooks, and the front fixing hooks have a margin that allows the front fixing rod to move relative to the front fixing hooks in the horizontal longitudinal direction.
[0011] According to one embodiment of the present invention, the front axle drive assembly includes a cab, the front wheels are located below the cab and are used to integrate power output and steering functions; the rear wheels of the vehicle are unpowered follower wheels, and the rear ends of the rocker arm beams on both sides are respectively hinged to the two rear wheels of the vehicle.
[0012] According to one embodiment of the present invention, one end of the hydraulic cylinder is hinged to the longitudinal beam, and the other end is hinged to the front end of the rocker arm beam, forming a scissor-type lifting and lowering mechanism; when the hydraulic cylinder extends, the upper casing lowers under the action of the lifting and lowering mechanism; when the hydraulic cylinder retracts, the casing is lifted under the action of the lifting and lowering mechanism.
[0013] According to one embodiment of the present invention, based on the extension and retraction length of the cylinder rod of the hydraulic cylinder, the chassis assembly includes at least the following working states: driving state, in which the extension and retraction length of the cylinder rod of the hydraulic cylinder is between fully extended and fully retracted; ground separation state, in which the cylinder rod of the hydraulic cylinder is fully extended, causing the bottom of the superstructure to contact the ground; and elevated state, in which the cylinder rod of the hydraulic cylinder is fully retracted, causing the horizontal height of the superstructure to be raised.
[0014] According to one embodiment of the present invention, a foot pad is provided at the bottom of the upper casing; in the ground separation state, the foot pad is supported between the upper casing and the ground, so that space is reserved between the front and rear assembly structures of the upper casing and the ground to allow the front end of the rocker arm beam and the rear end of the longitudinal beam to move.
[0015] According to one embodiment of the present invention, a downwardly extending triangular connecting plate is provided in the middle of the longitudinal beam; the bottom of the triangular connecting plate is hinged to the middle position of the rocker arm beam; the hinge point between the hydraulic cylinder and the longitudinal beam is located above the triangular connecting plate.
[0016] The present invention also provides a fire truck, which includes the quick-loading and unloading chassis of the above embodiments.
[0017] The present invention provides a rapid loading and unloading chassis and fire truck. By incorporating a movable beam frame structure consisting of longitudinal beams and rocker arm beams on the chassis assembly, and configuring a hydraulic cylinder drive mechanism between the rocker arm beams and longitudinal beams, the rocker arm beams rotate relative to the longitudinal beams, thereby driving the upper loading container to lift and lower. The front and rear ends of the upper loading container are equipped with assembly structures adapted to the rear ends of the longitudinal beams and the front ends of the rocker arm beams, ensuring the container remains level during loading and unloading, preventing equipment from slipping or wasting space due to tilting. This structure not only simplifies the multi-stage operation process in traditional handling and reduces manual intervention, but also improves loading and unloading efficiency and safety, meeting the actual needs of rapid response and efficient operation in firefighting operations. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this invention 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 invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a structural schematic diagram of the quick-loading and unloading chassis for the box provided by the present invention.
[0020] Figure 2 This is a structural schematic diagram of the chassis assembly and front axle drive assembly of the quick-loading and unloading chassis provided by the present invention.
[0021] Figure 3 yes Figure 2 A side view of the structure shown.
[0022] Figure 4 yes Figure 2 The diagram shows a top view of the structure.
[0023] Figure 5 This is a schematic diagram of the upper body of the quick-loading and unloading chassis provided by the present invention.
[0024] Figure 6 This is a schematic diagram of the landing separation state of the chassis for quick loading and unloading of the box provided by the present invention.
[0025] Figure 7 This is a schematic diagram of the elevated state of the chassis for quick loading and unloading of the box provided by the present invention.
[0026] Figure label: 11. Longitudinal beam; 12. Front wheel of vehicle; 13. Hydraulic cylinder; 14. Front beam; 15. Cab; 16. Triangular connecting plate; 21. Rocker arm beam; 22. Rear wheel of vehicle; 23. Front fixing rod; 30. Upper body box; 31. Rear fixing pin; 32. Front fixing hook; 33. Foot mat. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that in the description of the present invention, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.
[0029] To improve the response efficiency of fire emergency rescue, this invention proposes a modular container-type rapid loading and unloading chassis and its matching fire truck. Based on an innovatively designed lifting mechanism, this chassis system enables the horizontal lifting and lowering of the upper container during loading and unloading. It can smoothly descend to the ground or be raised to a height platform for easy operation, improving the efficiency and stability of equipment handling. The chassis adopts a movable beam frame structure composed of longitudinal beams and rocker arm beams, combined with a hydraulic cylinder drive device, ensuring the container remains level throughout the loading and unloading process, avoiding the risk of equipment slippage due to tilting in traditional methods. Simultaneously, the upper container preferably uses a unified assembly interface, possessing modular and standardized characteristics, supporting rapid connection and separation from the chassis, realizing a "one vehicle, multiple containers, flexible loading" transportation mode. This meets the rapid deployment needs of different mission scenarios, providing a new path for the efficient transfer of firefighting equipment and enhancing the overall combat capability of emergency rescue.
[0030] The following is combined Figures 1-7 This invention describes specific embodiments of a rapid loading and unloading chassis and fire truck.
[0031] like Figure 1As shown, the present invention provides a quick-loading and unloading chassis for a box body, comprising: a chassis assembly connected to the front axle drive assembly of a vehicle, the front axle drive assembly including front wheels 12 of the vehicle; wherein, the chassis assembly includes a beam frame and a boom, the beam frame including longitudinal beams 11 disposed on both sides of the chassis assembly, the boom including rocker arm beams 21 disposed on both sides of the chassis assembly, the middle part of the rocker arm beams 21 being hinged to the middle part of the longitudinal beams 11, and the rear end of the rocker arm beams 21 being provided with rear wheels 22 of the vehicle; a superstructure box body 30, the front end and rear end of the superstructure box body 30 being respectively provided with assembly structures adapted to the front end of the rocker arm beams 21 and the rear end of the longitudinal beams 11; a hydraulic cylinder 13 is provided between the rocker arm beams 21 and the longitudinal beams 11, the hydraulic cylinder 13 being used to drive the longitudinal beams 11 and the rocker arm beams 21 to rotate relative to each other, thereby realizing the lifting and lowering action of the superstructure box body 30.
[0032] Specifically, the rapid loading and unloading chassis utilizes a movable beam frame structure composed of longitudinal beams 11 and rocker arm beams 21. Driven by hydraulic cylinders 13, the rocker arm beams 21 rotate relative to the longitudinal beams 11. When the hydraulic cylinders 13 extend or retract, they cause the rocker arm beams 21 and longitudinal beams 11 to swing relative to each other around the hinge point, thereby enabling the upper loading container 30, connected to the front end of the rocker arm beams 21 and the rear end of the longitudinal beams 11, to rise and fall as a whole while maintaining a horizontal position. In practical applications, the aforementioned rapid loading and unloading chassis is suitable for scenarios with high requirements for response speed and equipment dispatch efficiency, such as firefighting, emergency rescue, and field operations. For example, in fire rescue missions, operators can quickly activate the hydraulic cylinders 13 on the chassis via the hydraulic control system, allowing the upper loading container 30 to smoothly descend to the ground, enabling direct access to equipment without secondary manual handling. After completing the mission, the container can be quickly lifted and secured in transport mode, ready to proceed to the next mission location, significantly improving the mobility and emergency response capabilities of firefighting operations.
[0033] Furthermore, the design of the aforementioned quick-loading and unloading chassis can incorporate a limiting mechanism or buffer device at the connection between the longitudinal beam 11 and the rocker arm beam 21 to enhance stability and safety during lifting. Additionally, the control system of the hydraulic cylinder 13 can integrate an electro-hydraulic system to enable remote control or automatic leveling. Moreover, the assembly structure of the upper body 30 preferably adopts standardized mechanical interfaces, supporting the rapid replacement of various functional modules (such as storage boxes, generator sets, water pump units, etc.), forming a multi-functional transportation platform that can serve multiple purposes, further enhancing the equipment's versatility and adaptability.
[0034] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, according to a quick-loading and unloading chassis for a box-type vehicle according to the present invention, the beam frame includes a front beam 14, and the front axle drive assembly is provided with a laterally extending front connecting shaft (located below the cab 15, not shown in the figure); the front end of the front beam 14 is hinged to the front connecting shaft, and the rear end of the front beam 14 is rigidly connected to the longitudinal beams 11 on both sides; the rear end of the longitudinal beams 11 is provided with a rear fixing hook, and the rear sides of the rear end of the upper body box 30 are respectively provided with rear fixing pins 31 adapted to the rear fixing hooks of the two longitudinal beams 11. Specifically, the quick-loading and unloading chassis for a box-type vehicle further optimizes the beam frame structure design. By setting the hinged connection between the front beam 14 and the front connecting shaft, when the hydraulic cylinder 13 is actuated, the beam frame and the boom can synchronously generate relative swing, thereby realizing the overall lifting and lowering of the upper body box 30. This linkage structure not only improves the chassis's adaptability to different terrain conditions, but also enhances the stability and coordination during the lifting and lowering process, ensuring that the box-type vehicle remains horizontal during movement and avoiding the risk of equipment slippage due to tilting.
[0035] Based on this, the rear end of the longitudinal beam 11 is provided with a rear fixing hook, preferably a U-shaped hook groove structure with the opening facing upward or to the side, which facilitates quick alignment and locking with the rear fixing pin 31 of the upper body 30; at the same time, the outer surface of the upper body 30 is preferably also provided with an L-shaped guard plate, and the rear fixing pin 31 connects between the outer surface of the upper body 30 and the inner side of the L-shaped guard plate. This design not only improves the installation strength of the rear fixing pin 31, making it more stable under stress, but also forms a lateral limiting effect at both ends of the rear fixing pin 31, preventing the rear fixing hook from laterally disengaging in the connected state, thereby significantly improving the connection safety between the chassis and the body.
[0036] Furthermore, according to a quick-loading and unloading chassis for a container according to the present invention, the boom includes a front fixing rod 23, which is used to connect the front ends of two rocker arm beams 21; the front end of the upper container 30 is provided with a front fixing hook 32, which is used to cooperate with the front fixing rod 23. After the front fixing rod 23 is inserted into the front fixing hook 32, it combines with the rear fixing hook at the rear end of the longitudinal beam 11 and the rear fixing pin 31 at the rear end of the upper container 30 to form a synchronous locking connection between the front and rear ends, ensuring that the container remains stable during lifting and transportation, avoiding shaking or falling off, and improving the overall safety and reliability of operation.
[0037] Furthermore, according to a quick-loading and unloading chassis for a box according to the present invention, the number of front fixing hooks 32 is multiple; the front fixing hooks 32 are C-shaped hooks, and the front fixing hooks 32 have a margin allowing the front fixing rod 23 to move relative to the front fixing hook 32 in the horizontal longitudinal direction. Specifically, the number of front fixing hooks 32 is preferably multiple, evenly distributed along the front end of the upper box body 30, to improve connection strength and force balance. The front fixing hooks 32 are preferably C-shaped hook structures with their openings facing downwards, providing good anti-detachment performance and self-locking characteristics. The internal design of the C-shaped hook has a certain margin of movement, allowing the front fixing rod 23 to move slightly relative to the front fixing hook 32 in the horizontal longitudinal direction (this direction is described based on the vehicle's direction). This margin of movement is mainly used to compensate for the distance change between the front end of the rocker arm beam 21 and the rear end of the longitudinal beam 11 when the beam and boom swing relative to each other under the drive of the hydraulic cylinder 13, thereby avoiding connection stress concentration or jamming caused by structural deformation or displacement, and ensuring smooth and interference-free lifting and lowering operations. In the preferred embodiment, the maximum relative displacement between the front end of the rocker arm beam 21 and the rear end of the longitudinal beam 11 should match the maximum allowable movement margin of the C-hook to ensure that the connection between the box and the chassis remains stable and reliable throughout the entire process of lifting and lowering the chassis, without loosening or generating excessive assembly stress, thereby further improving the operational stability and safety of the entire rapid loading and unloading system.
[0038] According to a quick-loading and unloading chassis for a box-type vehicle according to the present invention, the front axle drive assembly includes a cab 15, with the front wheels located below the cab 15 for integrating power output and steering functions; the rear wheels 22 are unpowered follower wheels, and the rear ends of the rocker arm beams 21 on both sides are hinged to the two rear wheels 22 respectively. Specifically, this chassis assembly eliminates the rear-wheel drive axle in the traditional structure, adopting a 4×2 front-drive configuration, concentrating all drive and steering functions on the front axle, while the rear wheels only exist as follower support structures. This design not only effectively simplifies the vehicle's drivetrain, reduces mechanical complexity and maintenance costs, but also frees up a large amount of bottom space in the middle and rear of the chassis, providing ample space redundancy for the horizontal loading and unloading of the modular superstructure box 30.
[0039] Furthermore, the chassis assembly adopts a modular, frameless architecture, abandoning the traditional frame structure. A movable beam system composed of longitudinal beams 11 and rocker arm beams 21 undertakes the main load-bearing and movement functions, making the overall chassis structure lighter and more flexible in layout. During loading and unloading operations, the hydraulic cylinder 13 drives the rocker arm beams 21 to rotate relative to the longitudinal beams 11, thereby lifting and lowering the upper body box 30. The space freed up at the bottom of the chassis ensures that the box can move horizontally without physical interference. In addition, since the rear wheels are unpowered follower wheels and hinged to the ends of the rocker arm beams 21, they can swing synchronously with the boom structure during lifting and lowering, ensuring the stability and coordination of the entire chassis during loading and unloading, further enhancing the system's reliability and ease of operation.
[0040] According to a quick-loading and unloading chassis for a container of the present invention, one end of a hydraulic cylinder 13 is hinged to a longitudinal beam 11, and the other end is hinged to the front end of a rocker arm beam 21, forming a scissor-type lifting and lowering mechanism. When the hydraulic cylinder 13 extends, the upper container 30 lowers under the action of the lifting and lowering mechanism; when the hydraulic cylinder 13 retracts, the container is lifted under the action of the lifting and lowering mechanism. Specifically, this scissor-type structure drives the relative rotation angle between the rocker arm beam 21 and the longitudinal beam 11 through the hydraulic cylinder 13, thereby driving the entire beam frame system to move in tandem and controlling the lifting and lowering process of the upper container 30. This mechanism can ensure that the container remains horizontal during the lifting and lowering process, avoiding problems such as equipment slippage or unstable loading and unloading due to tilting.
[0041] Furthermore, the design of this lifting mechanism takes into account the loading and unloading needs under different operating scenarios, and can be matched with dual-mode operation functions of rapid ground separation and high-platform docking. For example, in emergency rescue scenarios where the container needs to be quickly unloaded to the ground, cylinder 13 drives the container to descend smoothly to a position close to the ground, facilitating personnel to quickly retrieve and place equipment; while in scenarios where high-altitude docking with a transport platform or workbench is required, cylinder 13 can lift the container to the target height to achieve precise docking. This dual-mode operation capability effectively solves the problem that traditional chassis can only support a single loading and unloading method due to structural limitations, significantly expanding the applicability and flexibility of the container rapid loading and unloading chassis.
[0042] like Figure 1 , Figure 6 and Figure 7As shown, according to the present invention, a quick-loading and unloading chassis for a container body, based on the extension and retraction length of the cylinder rod of the hydraulic cylinder 13, the chassis assembly includes at least the following working states: Driving state, where the extension and retraction length of the cylinder rod of the hydraulic cylinder 13 is between fully extended and fully retracted; Ground separation state, where the cylinder rod of the hydraulic cylinder 13 is fully extended, causing the bottom of the upper container body 30 to contact the ground; and Platform lifting state, where the cylinder rod of the hydraulic cylinder 13 is fully retracted, raising the horizontal height of the upper container body 30. Specifically, by controlling the extension and retraction stroke of the hydraulic cylinder 13, precise control of the lifting and lowering action of the upper container body 30 can be achieved, and corresponding chassis working modes can be switched in different operating scenarios to meet diverse emergency task requirements.
[0043] In driving mode, the hydraulic cylinder 13 is in the middle position, and the upper body 30 and the chassis form an assembly structure, maintaining a stable transportation posture and adapting to the requirements of conventional road driving. After arriving at the work point, it enters the landing separation state, the hydraulic cylinder 13 extends fully, drives the rocker arm beam 21 and the longitudinal beam 11 to swing relative to each other, and drives the body to land smoothly on the ground. Then the chassis automatically disassembles and drives away, realizing the independent deployment of the body, which facilitates rapid on-site operation. When facing application scenarios such as loading and unloading platforms with height differences and fire-fighting access surfaces, the chassis enters the high platform lifting state, the hydraulic cylinder 13 retracts fully, and lifts the body to the designated height, ensuring that it is precisely aligned with the high platform plane, thereby achieving "zero bending" loading and unloading of equipment, significantly improving operating efficiency and human-machine interaction experience. Furthermore, in actual operation, the chassis can be aligned with the target container by reversing. After the lifting mechanism is activated, it will automatically rise. The front fixing rod 23 will be inserted into the front fixing hook 32, and the rear fixing pin 31 will be embedded in the rear fixing hook at the end of the longitudinal beam 11 to complete the automatic locking. Then the hydraulic cylinder 13 will continue to move to lift the container to the standard transportation height for towing. After the transportation task is completed, during the landing process of the container, the lifting mechanism will be further finely adjusted to lower it, so that the front and rear connecting structures will be automatically unlocked to achieve uninterrupted separation.
[0044] like Figure 5 As shown, according to a quick-loading and unloading chassis of the present invention, the bottom of the upper casing 30 is provided with foot pads 33; as Figure 6 As shown, in the ground-separated state, the foot pad 33 supports the upper body 30 between it and the ground, ensuring sufficient space between the front and rear assembly structures of the upper body 30 and the ground to allow movement of the front end of the rocker arm beam 21 and the rear end of the longitudinal beam 11. Specifically, the foot pad 33 not only provides cushioning and stable support but also offers the necessary structural clearance for the separation and docking of the chassis and the body, ensuring that during the lifting mechanism's operation, the front fixing rod 23 and the rear fixing hook on the chassis can smoothly detach from or connect to the corresponding assembly structures on the body.
[0045] Furthermore, the height design of the foot pads 33 takes into account the travel and space requirements of the chassis connection structure, ensuring that when the hydraulic cylinder 13 is fully extended and the box is lowered to the ground, the front end of the rocker arm beam 21 and the rear end of the longitudinal beam 11 can still maintain a certain amount of horizontal movement, thus smoothly completing the automatic unlocking or locking action of the front and rear connection points. In addition, the foot pads 33 are preferably made of wear-resistant, non-slip, and elastic materials, which can not only reduce the impact force when the box lands, but also enhance the stability of the box in the independent deployment state, preventing displacement caused by uneven ground or external forces.
[0046] Furthermore, the sides of the upper body box 30 are preferably equipped with anti-collision strips to prevent friction damage between the longitudinal beams 11 and the box shell due to relative movement during lifting or transportation, thereby improving the safety and service life of the overall structure. Simultaneously, the upper body box 30 preferably adopts a standardized modular design, with its main structure, external dimensions, and key installation and fixing point positions all following unified specifications. While different functional types of boxes may differ in internal configuration or purpose, they can all achieve rapid coupling and separation with the chassis through a unified interface, meeting the practical needs of "one vehicle, multiple boxes, and multiple application scenarios."
[0047] According to a quick-loading and unloading chassis for a box according to the present invention, a downwardly extending triangular connecting plate 16 is provided in the middle of the longitudinal beam 11; the bottom of the triangular connecting plate 16 is hinged to the middle position of the rocker arm beam 21; the hinge point between the hydraulic cylinder 13 and the longitudinal beam 11 is located above the triangular connecting plate 16. Specifically, the triangular connecting plate 16, as a key structural force transmission node, not only enhances the connection rigidity between the longitudinal beam 11 and the rocker arm beam 21, but also provides stable mechanical support for the entire lifting mechanism. By setting the hinge position of the hydraulic cylinder 13 above the triangular connecting plate 16, the hydraulic cylinder 13 can drive the rocker arm beam 21 to rotate around its hinge point with the triangular connecting plate 16 at a more optimal force angle during the extension and retraction process, thereby driving the upper box 30 to achieve lifting and lowering actions. This structure utilizes the lever principle and scissor motion characteristics. Under the drive of the hydraulic cylinder 13, the rocker arm beam 21 can swing flexibly around the middle hinge point, forming a linkage effect with the longitudinal beam 11, ensuring that the box remains horizontal throughout the entire lifting and lowering process.
[0048] The present invention also provides a fire truck, which includes the quick-loading and unloading chassis of the above-described embodiments. The fire truck provided by the present invention will be described below, and the fire truck described below can be referred to in correspondence with the quick-loading and unloading chassis described above.
[0049] In a preferred embodiment, the fire truck includes the quick-loading and unloading chassis described above, employing a 4×2 front-drive structure and a frameless modular architecture. It integrates a scissor-lift mechanism, using hydraulic cylinders 13 to drive the longitudinal beams 11 and rocker arm beams 21 to rotate relative to each other, thus achieving the lifting and lowering of the upper body 30. The chassis has assembly structures at the front and rear ends that match the body, including a front fixing rod 23, a rear fixing hook, and standardized mechanical interfaces, supporting rapid docking and separation of modular bodies of various functions. Simultaneously, the chassis eliminates the traditional rear-axle drive structure, simplifying the transmission system, freeing up bottom space, and providing sufficient motion redundancy for horizontal loading and unloading of the body.
[0050] In practical applications, this fire truck can be flexibly configured with various functional compartments such as storage boxes, generator sets, high-pressure water pump modules, and lighting equipment compartments according to different mission requirements, realizing a diversified operation mode of "one vehicle with multiple compartments and multiple uses". The entire loading and unloading process can be designed to be completed automatically by the hydraulic system, and the compartment replacement can be completed in just a few minutes, without the need for secondary manual handling or complex adjustments, thus improving the efficiency of on-site emergency response and the flexibility of equipment dispatch.
[0051] This fire truck boasts significant advantages in loading and unloading efficiency and ease of operation. The container can be quickly lowered or raised horizontally, avoiding the cumbersome procedures and time waste associated with traditional hydraulic tailgate operations and tilting hook truck transport, thus meeting the "golden time" requirements for emergency rescue. Especially in high-platform operations, the container can be adapted to the platform height, enabling "zero-bending" loading and unloading of equipment, significantly shortening operation time, reducing firefighters' physical exertion, and improving operational efficiency.
[0052] Furthermore, this fire truck maintains a level cargo box throughout the loading and unloading process, resolving issues such as equipment slippage, collisions, and low internal space utilization caused by excessive tilting angles in traditional hooklift trucks. This ensures the safety and integrity of the equipment inside the cargo box. Multiple design features, including foot pads, anti-collision strips, and limiting structures, enhance the connection stability and cushioning protection between the chassis and the cargo box, further improving the overall system's safety and reliability.
[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A quick-loading and unloading chassis for a box, characterized in that, include: A chassis assembly connected to a front axle drive assembly of a vehicle, the front axle drive assembly including the front wheels of the vehicle; The chassis assembly includes a beam frame and a boom. The beam frame includes longitudinal beams disposed on both sides of the chassis assembly. The boom includes rocker arm beams disposed on both sides of the chassis assembly. The middle part of the rocker arm beam is hinged to the middle part of the longitudinal beam. The rear end of the rocker arm beam is provided with a vehicle rear wheel. The upper body has an assembly structure at its front and rear ends that is adapted to the front end of the rocker arm beam and the rear end of the longitudinal beam, respectively. A hydraulic cylinder is provided between the rocker arm beam and the longitudinal beam. The hydraulic cylinder is used to drive the longitudinal beam and the rocker arm beam to rotate relative to each other, thereby realizing the lifting and lowering action of the upper loading box.
2. The quick-loading and unloading chassis for the box body according to claim 1, characterized in that, The beam frame includes a front beam, and the front axle drive assembly is provided with a laterally extending front connecting shaft; The front end of the front beam is hinged to the front connecting shaft, and the rear end of the front beam is rigidly connected to the longitudinal beams on both sides. The rear end of the longitudinal beam is provided with a rear fixing hook, and the two sides of the rear end of the upper casing are respectively provided with rear fixing pins that are adapted to the rear fixing hooks of the two longitudinal beams.
3. The quick-loading and unloading chassis for the box body according to claim 1, characterized in that, The boom includes a front fixing rod for connecting the front ends of the two rocker arm beams; The front end of the upper casing is provided with a front fixing hook for cooperating with the front fixing rod.
4. The quick-loading and unloading chassis for the box body according to claim 3, characterized in that, The number of the front fixing hooks is multiple; The front fixing hook is a C-shaped hook, and the front fixing hook has a margin that allows the front fixing rod to move relative to the front fixing hook in the horizontal longitudinal direction.
5. The quick-loading and unloading chassis for the box body according to claim 1, characterized in that, The front axle drive assembly includes a cab, with the front wheels located below the cab for integrating power output and steering functions; The rear wheels of the vehicle are unpowered follower wheels, and the rear ends of the rocker arm beams on both sides are respectively hinged to the two rear wheels of the vehicle.
6. The quick-loading and unloading chassis for a box according to any one of claims 1 to 5, characterized in that, One end of the hydraulic cylinder is hinged to the longitudinal beam, and the other end is hinged to the front end of the rocker arm beam, forming a scissor-type lifting mechanism. When the hydraulic cylinder extends, the upper casing descends under the action of the lifting mechanism. When the hydraulic cylinder retracts, the housing is lifted by the lifting mechanism.
7. The quick-loading and unloading chassis for the box body according to claim 6, characterized in that, Based on the extension and retraction length of the cylinder rod, the chassis assembly includes at least the following operating states: In driving mode, the extension and retraction length of the cylinder rod is between fully extended and fully retracted; In the ground separation state, the cylinder rod of the hydraulic cylinder is fully extended, so that the bottom of the upper casing contacts the ground; When the platform is raised, the cylinder rod of the hydraulic cylinder retracts completely, raising the horizontal height of the upper casing.
8. The quick-loading and unloading chassis for the box body according to claim 7, characterized in that, The bottom of the upper container is equipped with foot pads; In the ground-separated state, the foot pads are supported between the upper casing and the ground, so that space is left between the front and rear assembly structures of the upper casing and the ground to allow the front end of the rocker arm beam and the rear end of the longitudinal beam to move.
9. The quick-loading and unloading chassis for the box body according to claim 6, characterized in that, A downward-extending triangular connecting plate is provided in the middle of the longitudinal beam; The bottom of the triangular connecting plate is hinged to the middle position of the rocker arm beam; The hinge point between the hydraulic cylinder and the longitudinal beam is located above the triangular connecting plate.
10. A fire truck, characterized in that, The fire truck includes a quick-loading and unloading chassis as described in any one of claims 1 to 9.
Citation Information
Patent Citations
Low-position posture quick-changing device for underground coal mine container carrier
CN117227615A
Commercial vehicle with container
WO2005018985A1