A frame and a chassis suitable for a small sanitation vehicle

Abstract

The utility model provides a kind of frame and wire control chassis suitable for small sanitation car, the frame includes two longitudinal beams of mutually parallel arrangement, multiple mutually parallel cross beams are provided between two longitudinal beams, trapezoidal web is provided in the junction of longitudinal beam and cross beam, and the trapezoidal web is connected between longitudinal beam and / or cross beam by rivet;The cross section of longitudinal beam and the cross section of cross beam are all sheet metal bending and form integrated shape structure;Longitudinal beam and cross beam form multiple first frame structures connected with each other, second frame structure is provided in one first frame structure, and the second frame structure is connected with several front suspension plate spring mounting seat.The chassis has the advantages of large load and small wheelbase, and can efficiently adapt to various loading requirements.

Description

Technical Field

[0001] This utility model relates to the field of sanitation vehicle technology, and in particular to a frame and drive-by-wire chassis suitable for small sanitation vehicles. Background Technology

[0002] Currently, drive-by-wire chassis technology is rapidly iterating and its structural forms are becoming increasingly diverse. However, there are still significant product gaps in sanitation operation scenarios. On the one hand, the load-bearing capacity of small unmanned sanitation vehicle drive-by-wire chassis is generally limited to less than 1 ton. Due to the limitations of the overall vehicle size design, its driving range is short and its operating range is narrow, making it difficult to meet the needs of short-to-medium distance, high-frequency operations. On the other hand, although medium and heavy-duty drive-by-wire chassis can bear high loads, their wheelbase usually exceeds 2 meters, resulting in a large turning radius and insufficient operational flexibility in compact scenarios such as narrow alleys in residential areas and roads in old urban areas.

[0003] Furthermore, existing sanitation vehicle chassis also face the industry pain point of "limited adaptability." Most products still rely on secondary modifications to conventional truck chassis. If the superstructure dimensions do not match the chassis, a subframe often needs to be added at the rear, making the production process more cumbersome, increasing the weight of the frame, and raising costs. The superstructure structure also needs to passively adapt to the fixed dimensions and interface design of the chassis, resulting in the inability of some sanitation equipment (such as customized sweeping mechanisms and compact compression devices) to fully utilize its performance, exhibiting significant functional limitations.

[0004] Furthermore, during cleaning operations, unmanned sanitation vehicles operate under conditions of high-frequency vibration. The main frame directly bears the load from the superstructure and the road surface. High-frequency vibration can affect the normal operation of the superstructure and the autonomous driving sensors, reducing the service life of the equipment. In addition, the superstructure of unmanned sanitation vehicles is often asymmetrically arranged, which can easily lead to unilateral deformation of the main frame, reducing the vehicle's anti-rollover capability. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a chassis and drive-by-wire platform suitable for small sanitation vehicles. This chassis combines the advantages of high load capacity and short wheelbase, and can efficiently adapt to various superstructure requirements.

[0006] A frame for a small sanitation vehicle includes two parallel longitudinal beams and multiple parallel transverse beams between them. A trapezoidal web is provided at the junction of the longitudinal beams and the transverse beams, and the trapezoidal web is connected to the longitudinal beams and / or transverse beams by rivets. The cross-sections of the longitudinal beams and the transverse beams are both integral [-shaped] structures formed by sheet metal bending. The longitudinal beams and the transverse beams form multiple interconnected first frame structures, and a second frame structure is provided within one of the first frame structures. Several front suspension leaf spring mounting seats are connected to the second frame structure.

[0007] Rivet connections avoid welding defects and achieve stress diffusion from the connection point to a large area through the gradual change structure of the web, reducing the stress at the connection point. At the same time, the rivet penetrates the three-layer structure to improve shear resistance.

[0008] The front suspension leaf spring mounts are installed on the subframe, reducing the mounting center distance of the front suspension. During cornering, this design helps the vehicle absorb roll loads, preventing the superposition of roll and vibration. When the vehicle is operating on bumpy roads, this structure provides a "buffer layer" for the overall frame, increasing the stiffness of the front suspension frame, enhancing the absorption of high-frequency vibrations, and ensuring vehicle stability.

[0009] Preferably, the upper surface of the vehicle frame is provided with multiple upper structure protrusions.

[0010] Preferably, the height of the upper protrusion is 35mm.

[0011] Preferably, the upper mounting boss is provided with a connecting hole.

[0012] The boss isolates part of the space between the superstructure and the drive-by-wire chassis, which can be used to arrange wiring harnesses and pipes, improve assembly efficiency, and reduce later maintenance costs without damaging the original structure of the frame.

[0013] This utility model also discloses a drive-by-wire chassis suitable for small sanitation vehicles. The drive-by-wire chassis includes the frame as described above. A drive motor and controller are installed at the lower rear end of the frame. A power battery is installed at the lower middle part of the frame. A drive-by-wire steering gear and a drive-by-wire brake are installed at the lower front end of the frame.

[0014] The movable end of the front suspension leaf spring is adjusted to the front of the frame. This effectively reduces the turning radius of the vehicle and enhances its advantages in operating in narrow spaces.

[0015] Both the steering and braking systems employ highly integrated steer-by-wire mechanisms, including a steer-by-wire gear and a brake-by-wire actuator. The steer-by-wire system uses a rack and pinion structure and is located on the rear side of the front axle, further saving chassis space.

[0016] Preferably, a power battery mounting bracket is provided at the lower center of the vehicle frame, and the power battery mounting bracket has a hollow structure.

[0017] The beneficial effects of this utility model are as follows: 1. This utility model uses rivets to connect the longitudinal beams and the transverse beams. The front and rear overhang lengths can be flexibly adjusted according to the specific equipment requirements of the upper body. Multiple upper body bosses are used to set the upper body interface separately, which can be customized according to the size requirements of the upper body at the same time, and has high flexibility and compatibility.

[0018] 2. This chassis is adapted to small unmanned sanitation vehicles and can accurately match the dual requirements of "space adaptability" and "functional customization" for sanitation operations. It can also be applied to various scenarios such as small special-purpose vehicles and special vehicles. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the vehicle frame disclosed in this utility model; Figure 2 A schematic diagram of the overall chassis structure. Figure 1 ; Figure 3 A schematic diagram of the overall chassis structure. Figure 2 ; Among them, 1. crossbeam, 2. upper structure boss, 3. trapezoidal web, 4. longitudinal beam, 5. power battery mounting bracket, 6. front suspension leaf spring mounting seat, and 7. second frame structure. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] In this utility model, "upper," "lower," "left," and "right" refer to... Figure 1 The coordinates in the diagram are used as a reference. In this utility model, "inner" and "outer" are defined based on the area enclosed by the two sets of concrete foundations and the front and rear limiting mechanisms. For example, the left side of the left concrete foundation or the right side of the right concrete foundation is the outer side of the device.

[0024] To solve the above problems, this utility model discloses a method as follows: Figure 2-3The diagram shows a drive-by-wire chassis suitable for small sanitation vehicles. This chassis mainly includes, as shown below... Figure 1 The vehicle consists of a frame, running system, steering system, braking system, power system, and other accessories. The core parameters of this structure are as follows: wheelbase 1500mm, front and rear axle rated loads of 2t each, uniform axle load distribution, and a turning radius of 3.5m. The frame adopts an integral straight beam structure, using a one-piece sheet metal bending process with a []-shaped cross-section. The longitudinal beams 4 are connected to the reinforcing crossbeams 1 and trapezoidal webs 3 in a gradual transition. This structure can evenly distribute the load, resulting in minimal frame deformation under a 4t load. In terms of manufacturing, trapezoidal webs 3 and high-strength rivets are used to reinforce the connections. This avoids welding defects, and the gradual transition structure of the trapezoidal webs 3 allows stress to diffuse from the connection point to a wider area, reducing stress at the connection point. Simultaneously, the rivets penetrate the three layers of structure, increasing shear resistance.

[0025] The longitudinal beams 4 and the cross beams 1 are assembled into multiple first frame mechanisms with first and second connections. The power battery mounting bracket 5 is connected below the middle first frame structure. The second rectangular frame structure 7 is welded inside the two first frames at the front end of the main frame. The second frame structure 7 is connected to the main frame using a trapezoidal gradient web. The front suspension leaf spring mounting seat 6 is installed below the second frame structure 7 by rivets. The reinforcement structure composed of the second frame structure absorbs the vibration generated by the road surface and equipment during operation, avoids stress being directly transmitted to the main frame, and extends the service life of the frame and the superstructure equipment.

[0026] The front suspension leaf spring mounting bracket 6 is mounted on the second frame structure 7, reducing the mounting center distance of the front suspension. During cornering, this design helps the vehicle absorb roll loads, preventing the superposition of roll and vibration. When the vehicle is operating on bumpy roads, this structure provides a "buffer layer" for the overall frame, increasing the stiffness of the front suspension frame, enhancing high-frequency vibration absorption, and ensuring vehicle stability.

[0027] The integral straight beam frame structure adopts a riveted assembly connection. Compared with the existing technology that uses a standard Class II truck chassis, the assembled structure of this application can flexibly adjust the length of the crossbeam or longitudinal beam according to the specific needs of the superstructure equipment (achieved by adjusting the dimensions during material cutting). The superstructure boss 2 is welded above the longitudinal beam 4, and the connecting holes are machined on the superstructure boss as the superstructure interface, which can adapt to the fixed installation requirements of different types of superstructures.

[0028] The upper body boss 2 separates the vehicle frame from the upper body equipment bracket by 35mm, reserving an independent wiring harness and pipeline routing channel between the chassis and the upper body equipment, improving assembly efficiency, and without damaging the original structure of the vehicle frame, thus reducing later maintenance costs.

[0029] The front and rear suspensions of the driving system are leaf spring structures, with the movable end of the front leaf spring adjusted to the front of the frame. This design effectively reduces the turning radius of the vehicle, enhancing its advantages in narrow environments. In addition, the forward placement of the movable end effectively suppresses brake dive, improves braking stability, and helps maintain a relatively stable vehicle posture.

[0030] Both the steering and braking systems employ highly integrated steer-by-wire actuators, specifically including a steer-by-wire gear 14 and a brake-by-wire actuator 8. The steer-by-wire system uses a rack and pinion structure and is located on the rear side of the front axle, further saving chassis space.

[0031] The power system includes a drive axle 9, a drive motor 10 and motor controller 11, a power battery 12, and a charging mechanism 13. The drive axle 9 is a high-ratio single-speed axle, suitable for use on steep inclines. The power battery 12 is located in the middle of the vehicle and has dual power supply capabilities from both the chassis and the superstructure, eliminating the need for an additional battery on the superstructure and saving space. Simultaneously, the optimized battery capacity increases the no-load range to 100km, expanding the operating range. The battery installation adopts a lifting bracket and a recessed design within the frame. Compared to traditional externally mounted batteries, this increases ground clearance, effectively avoiding the risks of bumps and stones on the road surface, improving vehicle passability and adapting to uneven road conditions.

[0032] Compared with current small-scale drive-by-wire chassis, this invention effectively solves the following pain points: First, the low load-bearing capacity is a common problem in small-scale unmanned drive-by-wire chassis; second, the fixed structure of traditional chassis significantly limits the adaptability and installation space of the superstructure equipment; and third, it effectively reduces the problem of deformation and cracking of the vehicle frame due to prolonged high-frequency vibration during operation. This solution not only fills the market gap for small-wheelbase, high-load-bearing drive-by-wire chassis, but its adjustable height and rigidity also provide ample space for personalized design and functional expansion of the superstructure equipment. Simultaneously, it improves frame rigidity, increases the frame's resistance to high-frequency vibration, and effectively avoids structural fatigue caused by repeated deformation.

[0033] This invention, while maintaining a similar wheelbase, not only significantly improves load-bearing capacity but also boasts high reliability. Its chassis interface and structure can be customized to meet different superstructure requirements. It not only satisfies a wider range of load-bearing needs but also serves as a universal carrier, achieving highly precise and efficient matching with diverse superstructures through flexible adjustments.

[0034] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the present invention by those skilled in the art without departing from the spirit and essence of the present invention, and such modifications or substitutions should all be within the scope of the present invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should also be included within the protection scope of the present invention.

Claims

1. A frame suitable for small sanitation vehicles, characterized in that, The frame includes two parallel longitudinal beams, with multiple parallel transverse beams between them. A trapezoidal web is provided at the junction of the longitudinal beams and the transverse beams, and the trapezoidal web is connected to the longitudinal beams and / or transverse beams by rivets. The cross-sections of the longitudinal beams and the transverse beams are both integral I-shaped structures formed by sheet metal bending. The longitudinal beams and the transverse beams form multiple interconnected first frame structures, and a second frame structure is provided within one of the first frame structures. The second frame structure is connected to several front suspension leaf spring mounting seats.

2. The frame for a small sanitation vehicle according to claim 1, characterized in that, The upper surface of the vehicle frame is provided with multiple superstructure protrusions.

3. A frame suitable for small sanitation vehicles according to claim 2, characterized in that, The height of the upper protrusion is 35mm.

4. A vehicle frame suitable for small sanitation vehicles according to claim 2, characterized in that, The upper mounting boss is provided with a connection hole.

5. A drive-by-wire chassis suitable for small sanitation vehicles, characterized in that, The drive-by-wire chassis includes a frame as described in any one of claims 1 to 4, with a drive motor and controller mounted below the rear end of the frame, a power battery mounted below the middle of the frame, and a drive-by-wire steering gear and a drive-by-wire brake mounted below the front end of the frame.

6. A drive-by-wire chassis suitable for small sanitation vehicles according to claim 5, characterized in that, A power battery mounting bracket is provided at the lower center of the vehicle frame, and the power battery mounting bracket has a hollow structure.

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