Chassis arrangement structure of four-door special operation vehicle matched with front and rear disc type axles and vehicle
By adopting the front and rear disc bridge structure and high-rigid leaf spring suspension design on the special operation vehicle, the problem of poor heat dissipation of the drum drive axle is solved, and the chassis layout of the special operation vehicle with fast braking response and high safety is achieved. It is suitable for small fire emergency vehicles and command vehicles and other models.
Patent Information
- Application Number
- CN202422628039.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-30
AI Technical Summary
The drum-type driving axle of existing special operation vehicles has poor heat dissipation capabilities, which affects the braking effect, poses safety hazards, and requires regular maintenance, which cannot meet the working environment needs of the ABS/EBS system.
The front and rear disc axle structure are adopted, and the frame is a double-layer design. The front and rear suspension adopts a less-leaf spring structure. The cab is connected by a four-point suspension system. The tires are arranged on the axle wheel hub and a hybrid pattern tire are installed. The rear suspension uses high-rigid leaf springs and 50mm thick spring seats to reserve space for disc brake room.
It improves the braking reaction speed, enhances the heat dissipation and heat attenuation of the vehicle, improves driving safety and water wading capabilities, and adapts to the working environment of the ABS/EBS system.
Smart Images
Figure CN223212418U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a chassis layout structure of a four-door special operation vehicle matched with front and rear disc bridges and the vehicle, belonging to the technical field of automobiles. Background Art
[0002] Currently, most 4×2 chassis designed for special operations vehicles feature drum-type drive axles, used in convertible small special operations vehicles, small command vehicles, and small emergency vehicles. Few domestic competitors have developed chassis with single-disc rear axles. Due to the poor heat dissipation capacity of drum rear axles, heat cannot be dissipated quickly under prolonged continuous braking, affecting braking effectiveness and posing a safety hazard. Furthermore, drum brakes require regular cleaning and adjustment of the brake shoe clearance. To ensure firefighters can complete disaster relief missions stably and quickly, a specialized chassis with front and rear discs is urgently needed for special operations vehicles, improving brake response speed and adapting to the operating environment of ABS / EBS systems. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to address the defects of the existing technology and provide a chassis layout structure and vehicle of a four-door special operation vehicle matching the front and rear disc bridges, so as to effectively bring into play the chassis performance.
[0004] To solve this technical problem, the utility model provides a four-door special operation vehicle chassis layout structure matching front and rear disc bridges, including a frame, a cab, an exhaust system, a disc rear axle, a battery box, a fuel tank, a urea tank, a gearbox and a leaf spring suspension, wherein the disc rear axle is connected to the leaf spring suspension by bolts, and the leaf spring suspension is fixed to the frame by bolts; the frame is a double-layer frame, and the front and rear suspensions adopt a leaf spring-less structure and are connected to the frame by bolts; the front axle is a steering axle, and the rear axle is a drive axle, and the drive axle drive form is 4×2, which is fixed to the front suspension and the rear suspension respectively; the cab and the gearbox are assembled on the frame through a suspension connection, the urea tank, the fuel tank and the battery box are arranged in sequence on the left side of the frame along the X direction, and the exhaust system is arranged on the right side of the frame; the tires are arranged on the axle hub.
[0005] The frame is designed for a short wheelbase, and the two cross beams of the double-layer frame are tubular beams.
[0006] The leaf spring suspension includes a rear spring front bracket, a small-leaf rear leaf spring assembly, a grease nipple assembly, a leaf spring pressure plate, a spring rear bracket, a spring seat, a limit block assembly, a front spring riding bolt and a front spring lifting ear assembly. The middle part of the small-leaf rear leaf spring assembly is fixed by a leaf spring pressure plate using a front spring riding bolt, and a rear spring front bracket and a rear spring rear bracket are respectively provided at both ends; the leaf spring suspension is assembled on the vehicle frame through the rear spring front bracket and the rear spring rear bracket using hexagonal head bolts and hexagonal flange nuts.
[0007] The disc rear axle includes a leaf spring upper seat, a brake air chamber, a single rear axle housing assembly, a sensor bracket assembly, a rear wheel hub with a brake disc assembly, a flange assembly and a leaf spring lower seat. The leaf spring upper seat and the leaf spring lower seat are provided with through holes adapted to riding bolts. The disc rear axle is assembled on the leaf spring suspension through the leaf spring upper seat and the leaf spring lower seat using riding bolts and Spirax hexagonal thick flange nuts.
[0008] The cab includes a four-door cab body, front and rear fenders, a rear step assembly for a fire-fighting four-door cab, front and rear cab suspensions, a bumper and a front lower protection. The four-door cab body adopts an extended bulged floor design, is connected to the frame through a four-point suspension system, and is provided with a front flip mechanism; the suspension system adopts a coil spring front cab suspension and an air spring rear cab suspension.
[0009] The bumper adopts a three-section full metal bumper. The front lower protection is connected to the lower wing surface of the frame through a separate frame connecting plate, and the side is connected to the front end casting of the frame. The front lower protection installation point is adjusted through the frame connecting plate.
[0010] The rear suspension uses high-rigidity leaf springs and 50mm thick spring seats to keep the vehicle low in front and high in the rear, reserving space for the disc brake compartment.
[0011] The chassis is equipped with mixed pattern tires arranged in a front single tire and rear double tire form and fixed on the axle wheel hub.
[0012] The utility model also provides a vehicle, comprising the above-mentioned four-door special operation vehicle chassis matched with the front and rear disc bridges.
[0013] Beneficial effects: The utility model adopts a disc-structured drive axle with a 4×2 drive form and a single rear axle system. It has good heat dissipation, resistance to thermal attenuation, and resistance to water attenuation, and a fast braking response speed, which improves driving safety. The air chamber interface is high, which enhances the vehicle's wading ability. The rear suspension uses high-rigidity leaf springs and 50mm thick spring seats to maintain a low front and high rear posture of the vehicle, and reserves space for the layout of the disc brake room. It can be modified into various models such as small fire emergency vehicles and small command vehicles as needed. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic top view of the structure of the present utility model;
[0015] Figure 2 It is a schematic side view of the structure of the utility model;
[0016] Figure 3 This is a schematic structural diagram of the disc-type rear axle of the utility model;
[0017] Figure 4 The structure diagram of the leaf spring suspension of this utility model Figure 1;
[0018] Figure 5 The structure diagram of the leaf spring suspension of this utility model Figure 2 .
[0019] In the figure: 1. Vehicle frame; 2. Cab; 3. Exhaust system; 4. Disc rear axle; 41. Leaf spring upper seat; 42. Brake chamber; 43. Single rear axle housing assembly; 44. Sensor bracket assembly; 45. Rear wheel hub with brake disc assembly; 46. Flange assembly; 47. Leaf spring lower seat; 5. Battery box; 6. Fuel tank; 7. Urea tank; 8. Gearbox; 9. Leaf spring suspension; 91. Rear spring front bracket; 92. Rear leaf spring assembly with small leaf; 93. Grease nipple assembly; 94. Leaf spring pressure plate; 95. Rear spring rear bracket; 96. Spring seat; 97. Limit block assembly; 98. Front spring riding bolt; 99. Front spring lifting ear assembly. DETAILED DESCRIPTION
[0020] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0021] like Figure 1-Figure 5 As shown, the utility model provides a chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges, including a frame 1, a cab 2, an exhaust system 3, a disc rear axle 4, a battery box 5, a fuel tank 6, a urea tank 7, a gearbox 8 and a leaf spring suspension 9. The disc rear axle 4 is connected to the leaf spring suspension 9 by bolts, and the leaf spring suspension 9 is fixed to the frame 1 by bolts; the frame 1 is a double-layer frame, and the front and rear suspensions adopt a maintenance-free leaf spring structure and are connected to the frame 1 by bolts. , self-lubricating rubber bushings are provided at the leaf spring ears at both ends, and frequent lubrication is unnecessary; the front axle is a steering axle, and the rear axle is a disc-type drive axle. The drive axle is a 4×2 single rear axle system, which is fixed on the front suspension and rear suspension respectively; the cab 2 and the gearbox 8 are assembled on the frame 1 through a suspension connection, and the urea tank 7, the fuel tank 8 and the battery box 5 are arranged in sequence on the left side of the frame 1 along the X direction. The exhaust system 3 is arranged on the right side of the frame 1 to avoid thermal hazards; the tires are arranged on the axle hub.
[0022] The frame 1 is designed with a short wheelbase and is matched with front and rear disc brake systems. The two cross beams of the double-layer frame are tubular beams.
[0023] The leaf spring suspension 9 includes a rear spring front bracket 91, a small-piece rear leaf spring assembly 92, a grease nipple assembly 93, a leaf spring pressure plate 94, a spring rear bracket 95, a spring seat 96, a limit block assembly 97, a front spring riding bolt 98 and a front spring hanging ear assembly 99. The middle part of the small-piece rear leaf spring assembly 92 is fixed by the leaf spring pressure plate 94 using the front spring riding bolt 98, and a rear spring front bracket 91 and a rear spring rear bracket 95 are respectively provided at both ends; the leaf spring suspension 9 is assembled on the vehicle frame 1 through the rear spring front bracket 91 and the rear spring rear bracket 95 using hexagonal head bolts and hexagonal flange nuts.
[0024] The disc rear axle 4 includes a leaf spring upper seat 41, a brake air chamber 42, a single rear axle housing assembly 43, a sensor bracket assembly 44, a rear wheel hub with a brake disc assembly 45, a flange assembly 46 and a leaf spring lower seat 47. The leaf spring upper seat 41 and the leaf spring lower seat 47 are provided with through holes adapted to riding bolts. The disc rear axle 4 is assembled on the leaf spring suspension 9 through the leaf spring upper seat 41 and the leaf spring lower seat 47 using riding bolts and Spirax hexagonal thick flange nuts.
[0025] The cab 2 includes a four-door cab body, front and rear fenders, a rear step assembly for a fire-fighting four-door cab, front and rear cab suspensions, bumpers and front lower protection. The four-door cab body adopts an extended bulge floor design, is connected to the frame 1 through a four-point suspension system, and is provided with a front flip mechanism, leaving space for later modification to match a single-axis power take-off, a hydraulic retarder and other configurations; the suspension system adopts a coil spring front cab suspension and an air spring rear cab suspension, which effectively ensures the stability and shock absorption function of the cab.
[0026] The bumper adopts a three-section all-metal bumper, which effectively reduces weight and improves the aesthetics of the bumper; the front lower protection is connected to the lower wing surface of the frame through a separate frame connecting plate, and the side is connected to the front end casting of the frame. The front lower protection installation point can be adjusted through the frame connecting plate, which is convenient and efficient.
[0027] The rear suspension uses high-rigidity leaf springs and 50mm thick spring seats to keep the vehicle low in front and high in the rear, reserving space for the disc brake compartment.
[0028] The chassis is equipped with mixed pattern tires arranged in a front single tire and rear double tire form and fixed on the axle wheel hub. Under good road conditions such as highways and national roads, the maximum driving speed can reach 110km / h.
[0029] The utility model also provides a vehicle, comprising the above-mentioned four-door special operation vehicle chassis matched with the front and rear disc bridges.
[0030] The drive axle of the utility model adopts a disc structure, the front axle is a steering axle, and the rear axle is a drive axle, which is fixed on the front and rear suspensions. The drive form is 4×2, single rear axle system. The heat dissipation, heat decay resistance and water decay resistance of the disc structure drive axle are better than those of the drum type. The braking response speed is fast, which improves driving safety. The rear suspension uses high-rigidity leaf springs and 50mm thick spring seats to keep the front low and the rear high posture of the vehicle, and reserve space for the layout of the disc brake room. The chassis of this special operation vehicle can be modified into various models such as small fire emergency vehicles and small command vehicles as needed. Under good road conditions such as highways and national roads, the maximum driving speed can reach 110km / h.
[0031] The above embodiments of the present invention are merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.
Claims
1. A chassis layout structure for a four-door special operation vehicle matching front and rear disc bridges, characterized by: The invention comprises a vehicle frame (1), a cab (2), an exhaust system (3), a disc rear axle (4), a battery box (5), a fuel tank (6), a urea tank (7), a gearbox (8) and a leaf spring suspension (9), wherein the disc rear axle (4) is connected to the leaf spring suspension (9) by bolts, and the leaf spring suspension (9) is fixed to the vehicle frame (1); the vehicle frame (1) is a double-layer vehicle frame, and the front and rear suspensions adopt a structure with a small leaf spring and are connected to the vehicle frame (1) by bolts; the front axle is a steering axle, and the rear axle is a drive axle, and the drive axle has a driving form of 4×2 and is fixed to the front and rear suspensions respectively; the cab (2) and the gearbox (8) are assembled on the vehicle frame (1) by suspension connection, the urea tank (7), the fuel tank (6) and the battery box (5) are arranged in sequence on the left side of the vehicle frame (1) along the X direction, and the exhaust system (3) is arranged on the right side of the vehicle frame (1); and the tires are arranged on the axle wheel hub.
2. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges according to claim 1 is characterized by: The frame (1) is designed for a short wheelbase, and the two cross beams of the double-layer frame are tubular beams.
3. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges according to claim 1 is characterized by: The leaf spring suspension (9) comprises a rear spring front bracket (91), a small-piece rear steel leaf spring assembly (92), a grease nipple assembly (93), a leaf spring pressure plate (94), a spring rear bracket, a spring seat (96), a limit block assembly (97), a front spring riding bolt (98) and a front spring hanging ear assembly (99). The middle portion of the small-piece rear steel leaf spring assembly (92) is fixed by the leaf spring pressure plate (94) using the front spring riding bolt (98), and a rear spring front bracket (91) and a rear spring rear bracket (95) are respectively provided at both ends.
4. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc axles according to claim 3 is characterized by: The leaf spring suspension (9) is assembled on the vehicle frame (1) via a rear spring front bracket (91) and a rear spring rear bracket (95) using hexagonal head bolts and hexagonal flange nuts.
5. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges according to claim 1 is characterized by: The disc rear axle (4) comprises a leaf spring upper seat (41), a brake air chamber (42), a single rear axle housing assembly (43), a sensor bracket assembly (44), a rear wheel hub with a brake disc assembly (45), a flange assembly (46) and a leaf spring lower seat (47). The leaf spring upper seat (41) and the leaf spring lower seat (47) are provided with through holes adapted to riding bolts. The disc rear axle (4) is assembled on the leaf spring suspension (9) through the leaf spring upper seat (41) and the leaf spring lower seat (47) using riding bolts and Spirax thick flange nuts.
6. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges according to claim 1 is characterized by: The cab (2) comprises a four-door cab body, front and rear fenders, a fire-fighting four-door cab rear boarding step assembly, front and rear cab suspensions, a bumper and a front lower protection. The four-door cab body adopts an extended bulge floor design, is connected to the vehicle frame (1) through a four-point suspension system, and is provided with a front flip mechanism; the suspension system adopts a coil spring front cab suspension and an air spring rear cab suspension.
7. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges according to claim 6 is characterized by: The bumper adopts a three-section full metal bumper. The front lower protection is connected to the lower wing surface of the frame through a separate frame connecting plate, and the side is connected to the front end casting of the frame. The front lower protection installation point is adjusted through the frame connecting plate.
8. The chassis layout structure of a four-door special operation vehicle matching front and rear disc axles according to claim 1 is characterized by: The rear suspension uses high-rigidity leaf springs and 50mm thick spring seats to keep the vehicle low in front and high in the rear, reserving space for the disc brake compartment.
9. The chassis layout structure of a four-door special operation vehicle matching the front and rear disc bridges according to any one of claims 1 to 8, characterized in that: The chassis is equipped with mixed pattern tires arranged in a front single tire and rear double tire form and fixed on the axle wheel hub.
10. A vehicle, characterized in that: A four-door special operation vehicle chassis matching the front and rear disc bridges according to any one of claims 1 to 9.