Assembled fire engine sub-beam

Abstract

The utility model discloses an assembly type fire engine vice beam, including vehicle longitudinal beam, transverse connecting beam, up and down connecting subassembly, damping buffer subassembly and vehicle vice beam bolt subassembly, vehicle longitudinal beam sets up in the both sides of fire engine chassis girder, and vehicle longitudinal beam is detachably connected in fire engine chassis girder through vehicle vice beam bolt subassembly, transverse connecting beam is transversely connected between the vehicle longitudinal beam of the both sides of fire engine chassis girder, and transverse connecting beam is used for strengthening integral stability, up and down connecting subassembly sets up between vehicle longitudinal beam and fire engine chassis girder. Damping buffer subassembly is used for absorbing the impact load and vibration energy produced when vehicle operation, and vehicle vice beam bolt subassembly is used for assembling and fixing each part, and vehicle vice beam bolt subassembly sets up in vice beam structure many stress points. Assemble and detach quickly, reduce maintenance and replacement cost. Vehicle vice beam bolt subassembly distributes at each stress node. Damping buffer subassembly utilizes the combination energy absorption of disc spring washer and thickening flat washer.

Description

Technical Field

[0001] This utility model relates to the technical field of fire truck chassis structure, specifically to a prefabricated fire truck sub-beam. Background Technology

[0002] The existing connection between the subframe and the main beam of the fire truck chassis mostly adopts the traditional welding fixing method. Although this structural design was common in the early manufacturing of fire-fighting equipment, it has gradually revealed many undeniable shortcomings in actual production and long-term use. From the production perspective, the welding process requires high operational precision and worker skill levels. It not only requires strict control of welding temperature and weld quality to avoid problems such as incomplete welds and missing welds, but also necessitates tedious grinding and rust prevention treatment after welding. This leads to a complex overall production process, significantly reduced production efficiency, and directly extended the manufacturing cycle of fire trucks, making it difficult to meet the demand for rapid delivery of emergency equipment.

[0003] In terms of use and maintenance, the non-removable nature of welded fixings causes significant inconvenience for subsequent maintenance. When local wear, corrosion, or replacement of related parts occur in the sub-beam, maintenance personnel must first cut the weld, and then re-weld it after repair. This not only increases maintenance costs and time but may also compromise the stability of the original structure due to secondary welding. Furthermore, the stress concentration generated during welding is difficult to completely eliminate. These concentrated stresses gradually accumulate during long-term driving, frequent starts and stops, and high-load operations of the fire truck, easily leading to fatigue cracks at the connection between the sub-beam and the main beam, severely shortening the service life of the sub-beam and even the entire vehicle.

[0004] Furthermore, fire trucks often need to travel at high speeds in complex road conditions or endure strong vibrations and high loads during firefighting operations, such as pump operation and equipment loading. Traditional welded sub-beams have relatively weak overall rigidity and are unable to effectively withstand these external impacts. After prolonged use, they are prone to structural deformation, which not only affects the sub-beam's support stability for the vehicle body components but may also cause additional damage to the main beam of the fire truck chassis, posing a safety hazard. Therefore, developing a fire truck sub-beam structure that allows for rapid assembly, facilitates later maintenance, and possesses good seismic resistance and structural strength has become a key requirement for improving the overall reliability and service life of fire trucks. Utility Model Content

[0005] The purpose of this invention is to provide a prefabricated fire truck sub-beam to solve the problems of complex installation, difficult maintenance, and insufficient rigidity of existing welded sub-beam structures.

[0006] To address the aforementioned technical problems, this utility model provides a prefabricated fire truck sub-beam, comprising a vehicle longitudinal beam, a transverse connecting beam, upper and lower connecting components, a shock-absorbing and buffering component, and a vehicle sub-beam bolt assembly. The vehicle longitudinal beam is disposed on both sides of the fire truck chassis main beam and is detachably connected to the fire truck chassis main beam via the vehicle sub-beam bolt assembly. The transverse connecting beam is transversely connected between the vehicle longitudinal beams on both sides of the fire truck chassis main beam, and is used to enhance overall stability. The upper and lower connecting components are disposed between the vehicle longitudinal beam and the fire truck chassis main beam. The shock-absorbing and buffering component is disposed between the upper and lower connecting components and the fire truck chassis main beam, and is used to absorb the impact load and vibration energy generated during vehicle operation. The vehicle sub-beam bolt assembly is used to assemble and fix the various components, and is disposed at multiple stress points of the sub-beam structure.

[0007] Furthermore, the upper and lower connecting components consist of a connecting seat and a connecting plate. The connecting seat is fixedly connected to the vehicle's longitudinal beam, and the connecting plate is connected to the main beam of the fire truck chassis. The connecting seat and the connecting plate are fixedly connected by bolts.

[0008] Furthermore, the upper and lower connecting components are integrally stamped structures.

[0009] Furthermore, the shock absorption and buffer assembly includes disc spring washers, thickened flat washers, and shock absorption and buffer bolts, with the disc spring washers located between the upper and lower connecting assemblies and the main beam of the fire truck chassis.

[0010] Furthermore, the vehicle sub-beam bolt assembly adopts a metal lock nut structure to prevent loosening due to prolonged vibration.

[0011] Furthermore, the transverse connecting beam is fixedly connected to the superstructure mounting assembly, which is used to install the fire truck's superstructure equipment.

[0012] Furthermore, the superstructure mounting components include a housing mounting base, a water tank mounting base, and a water pump mounting base. The superstructure mounting components are used for modular replacement according to different superstructure types.

[0013] Furthermore, the vehicle's longitudinal beam length and transverse connecting beams are available in various sizes.

[0014] The advantages of the prefabricated fire truck subframe provided by this utility model are as follows: Because the subframe uses a detachable bolt assembly method, replacing the traditional welded structure, assembly and disassembly are quicker, significantly reducing maintenance and replacement costs. The subframe bolt assemblies are distributed at each stress point, reducing stress concentration and improving overall mechanical performance. The shock absorption and buffer assembly utilizes a combination of disc spring washers and thickened flat washers to absorb energy, effectively reducing the vibration amplitude of the vehicle during driving and improving driving stability. The use of standardized bolts and stamping structures simplifies the production process, ensures high assembly precision, and facilitates subsequent maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the sub-beam of a prefabricated fire truck. Figure 2 This is a partial schematic diagram of the shock absorption and buffer assembly. Detailed Implementation

[0016] To better understand the purpose, structure, and function of this utility model, the following description is in conjunction with the appendix. Figures 1 to 2 The present invention provides a more detailed description of a prefabricated fire truck sub-beam.

[0017] like Figure 1 and Figure 2 As shown in the figure, an embodiment of this utility model discloses a prefabricated fire truck sub-beam, including a vehicle longitudinal beam 100, a transverse connecting beam 200, upper and lower connecting components, a shock-absorbing and buffering component 400, a vehicle sub-beam bolt assembly 500, and an upper structure mounting component 700. The vehicle longitudinal beams 100 are located on both sides of the main beam of the fire truck chassis and are detachably connected to the main beam of the fire truck chassis using the vehicle sub-beam bolt assembly 500. The longitudinal beams 100 are made of Q355D high-strength steel plate and are treated with anti-corrosion spraying.

[0018] The transverse connecting beam 200 is transversely connected to the vehicle longitudinal beam 100 using the same bolt connection method, forming a stable frame structure and improving the overall rigidity of the sub-beam.

[0019] In this invention, the upper and lower connecting components include a connecting seat 310 and a connecting plate 320. The connecting seat 310 is fixedly connected to the longitudinal beam 100, and the connecting plate 320 is connected to the main beam of the fire truck chassis. The two are locked together by the vehicle sub-beam bolt assembly 500, forming a stable upper and lower connection. The upper and lower connecting components are integrally formed by stamping process and are made of Q355D steel to ensure fatigue strength under long-term load.

[0020] In some embodiments, the shock-absorbing buffer assembly 400 consists of a disc spring washer 410, a thickened flat washer 420, and a shock-absorbing buffer bolt 430, and is installed between the upper and lower connecting assemblies and the main beam of the fire truck chassis. The disc spring washer 410 undergoes elastic deformation when the vehicle vibrates during operation, absorbing vibration energy, thereby effectively reducing impact transmission and improving vehicle driving stability.

[0021] Understandably, the upper structure mounting component 700 is fixed to the transverse connecting beam 200, and different modules can be selected according to different upper structure equipment. Specifically, it includes a box mounting base 710, a water tank mounting base 720, and a water pump mounting base 730, which are connected by the vehicle sub-beam bolt assembly 500, making installation flexible and easy to replace and maintain.

[0022] This utility model discloses a prefabricated sub-beam structure that is integrally installed on both sides of the main beam of the fire truck chassis. The installation sequence is as follows: first, assemble the vehicle longitudinal beam 100 and the transverse connecting beam 200 into a sub-beam frame; then, connect it to the main beam of the fire truck chassis via upper and lower connecting components; next, install the shock absorption and buffer components 400 and the vehicle sub-beam bolt components 500; and finally, install the superstructure mounting components 700. No welding is required throughout the entire process, and all connections are detachable structures, facilitating assembly and maintenance.

[0023] Trial assembly and testing results show that the sub-beam structure of this utility model is significantly superior to the traditional welded sub-beam in terms of load-bearing capacity, seismic performance, and ease of maintenance, which can effectively extend the service life of fire trucks and improve the overall reliability of the vehicle.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A prefabricated fire truck sub-beam, characterized in that, The system includes vehicle longitudinal beams (100), transverse connecting beams (200), upper and lower connecting assemblies, shock-absorbing and buffering assemblies (400), and vehicle sub-beam bolt assemblies (500). The vehicle longitudinal beams (100) are located on both sides of the main beam of the fire truck chassis, and are detachably connected to the main beam of the fire truck chassis via the vehicle sub-beam bolt assemblies (500). The transverse connecting beams (200) are transversely connected between the vehicle longitudinal beams (100) on both sides of the main beam of the fire truck chassis. The connecting beam (200) is used to enhance overall stability; the upper and lower connecting components are disposed between the vehicle longitudinal beam (100) and the fire truck chassis main beam; the shock absorption and buffer assembly (400) is disposed between the upper and lower connecting components and the fire truck chassis main beam, and the shock absorption and buffer assembly (400) is used to absorb the impact load and vibration energy generated during vehicle operation; the vehicle sub-beam bolt assembly (500) is used to assemble and fix the various components, and the vehicle sub-beam bolt assembly (500) is disposed at multiple stress points of the sub-beam structure.

2. The prefabricated fire truck sub-beam according to claim 1, characterized in that, The upper and lower connecting components consist of a connecting seat (310) and a connecting plate (320). The connecting seat (310) is fixedly connected to the vehicle longitudinal beam (100), and the connecting plate (320) is connected to the main beam of the fire truck chassis. The connecting seat (310) and the connecting plate (320) are fixedly connected by bolts.

3. The prefabricated fire truck sub-beam according to claim 2, characterized in that, The upper and lower connecting components are integrally stamped structures.

4. The prefabricated fire truck sub-beam according to claim 3, characterized in that, The shock-absorbing and buffering assembly (400) includes a disc spring washer (410), a thickened flat washer (420), and a shock-absorbing and buffering bolt (430). The disc spring washer (410) is located between the upper and lower connecting assemblies and the main beam of the fire truck chassis.

5. The prefabricated fire truck sub-beam according to claim 4, characterized in that, The vehicle sub-beam bolt assembly (500) adopts a metal lock nut structure to prevent loosening due to long-term vibration.

6. The prefabricated fire truck sub-beam according to claim 5, characterized in that, The transverse connecting beam (200) is fixedly connected to the superstructure installation assembly (700), which is used to install the fire truck superstructure equipment.

7. The prefabricated fire truck sub-beam according to claim 6, characterized in that, The superstructure mounting assembly (700) includes a housing mounting base (710), a water tank mounting base (720), and a water pump mounting base (730). The superstructure mounting assembly (700) is used for modular replacement according to different superstructure types.

8. The prefabricated fire truck sub-beam according to claim 7, characterized in that, The vehicle longitudinal beam (100) has various lengths and the transverse connecting beam (200) has various dimensions.

Images