Heavy-load chassis of electric tricycle

Abstract

The utility model relates to the technical field of electro-tricycles, and discloses a heavy load type underframe of an electro-tricycle, which comprises an underframe body, a connecting frame is fixedly connected to the inner wall of the underframe body, a plurality of sliding groove tables are fixedly connected to the inner wall of the connecting frame, and the inner walls of the sliding groove tables are connected with adapter rods through resistance groups. The opposite ends of the adapter rods are rotationally connected with buffer plates, the bottom ends of the buffer plates are connected with extrusion rods through buffer sets, the inner walls of the sliding groove tables are fixedly connected with connecting tables, the upper ends and the lower ends of the inner walls of the connecting tables are fixedly connected with connecting pipes, and the four corners of the outer wall of the bottom frame body are fixedly connected with sliding groove plates. The upper end and the lower end of the sliding groove plate are connected with an upper baffle and a lower baffle through assembling sets correspondingly, and the top end of the upper baffle is fixedly connected with a vehicle body frame. According to the utility model, through three-stage energy consumption of mechanical friction, elastic energy storage and fluid damping, the system can absorb impact energy, and the buffering performance is obviously improved.

Description

Technical Field

[0001] This utility model relates to the field of electric tricycle technology, and in particular to a heavy-duty chassis for an electric tricycle. Background Technology

[0002] Electric tricycles are three-wheeled transportation vehicles powered by high-performance batteries and driven by an electric motor, suitable for both cargo and passenger transport. They utilize high-capacity tubular batteries with deep discharge characteristics, meeting the demands of long-term continuous operation. Under normal use, the battery capacity exhibits minimal degradation after two years, ensuring long-term reliability. The power system features a DC series-wound traction motor, offering both brushed and brushless options, with an integrated speed-regulating and power-boosting device for precise speed control and robust power output. The motor's durable design ensures it is not easily damaged under standardized operating conditions, guaranteeing stable vehicle operation under various working conditions. With its high efficiency, durability, and adaptability, electric tricycles have become an ideal choice for short-distance urban transportation and rural logistics.

[0003] Early development of electric tricycle chassis focused primarily on improving static load-bearing capacity, neglecting the energy absorption requirements under dynamic loads. Their structural designs generally adopted a straight beam architecture with uniform cross-section, lacking corrugated deformation zones or buffer cavities designed to withstand vertical impacts. This resulted in the kinetic energy generated by road bumps being directly transferred to the cargo box and drive system through rigid connections. This rigid force transmission mode not only exacerbated the damage rate of goods but also caused high-frequency micro-vibrations at the welded parts of the chassis, accelerating the propagation of metal fatigue cracks, creating a vicious cycle, and affecting the service life of the chassis.

[0004] In response to this technical problem, this application proposes a heavy-duty chassis for an electric tricycle. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a heavy-duty chassis for an electric tricycle. Through three levels of energy dissipation—mechanical friction, elastic energy storage, and fluid damping—the system can absorb impact energy and significantly improve its buffering performance.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A heavy-duty chassis for an electric tricycle includes a chassis body. A connecting frame is fixedly connected to the inner wall of the chassis body. A plurality of sliding platforms are fixedly connected to the inner wall of the connecting frame. A transition rod is connected to the inner wall of the sliding platform through a resistance assembly. A buffer plate is rotatably connected to one end of each transition rod. A compression rod is connected to the bottom end of each buffer plate through a buffer assembly. A connecting platform is fixedly connected to the inner wall of each sliding platform. A connecting pipe is fixedly connected to the upper and lower ends of the inner wall of each connecting platform. Sliding plates are fixedly connected to the four corners of the outer wall of the chassis body. An upper baffle and a lower baffle are respectively connected to the upper and lower ends of each sliding plate through an assembly assembly. A vehicle frame is fixedly connected to the top of the upper baffle.

[0008] Furthermore, the resistance assembly includes slide rods fixedly connected to both ends of the inner wall of the slide platform, slide blocks slidably connected to the outer walls of the slide rods, and the opposite ends of the adapter rods rotatably connected to the upper and lower ends of the slide blocks respectively.

[0009] Furthermore, friction plates are fixedly connected to both ends of the slide block, and the outer wall of the friction plate is in close contact with the inner wall of the slide platform.

[0010] Furthermore, the buffer group includes a fixing rod fixedly connected to each end of the buffer plate, and the fixing rods are respectively fixedly connected to the opposite ends of the compression rods.

[0011] Furthermore, each of the buffer plates is fixedly connected to a return spring at one end, and the other end of the return spring is fixedly connected to the upper and lower ends of the connecting platform, respectively.

[0012] Furthermore, each of the extrusion rods is fixedly connected to a reflux plate at one end, and the outer wall of the reflux plate is sleeved on the inner wall of the connecting pipe.

[0013] Furthermore, the assembly includes a transition block that is slidably connected at both ends of the slide plate, and a fixing bolt is fixedly connected to the opposite end of each transition block, and a connecting nut is installed on the outer wall of each fixing bolt.

[0014] This utility model has the following beneficial effects:

[0015] In this invention, when the upper baffle and lower baffle are compressed, the buffer plate disperses the impact stress through its curved surface, causing the fixed rod to compress the return spring, thus converting the impact energy into elastic potential energy. The sliding block moves along the sliding rod, generating heat through friction with the friction plate and dissipating mechanical energy. At the same time, the extrusion rod pushes the return plate downward, and its wedge-shaped groove forms a gradually narrowing oil passage with the connecting pipe, generating gradient viscous resistance. When the return spring rebounds, the return plate moves in the opposite direction, and the inverted cone structure reduces the oil return velocity, forming hydraulic damping. Through three levels of energy dissipation—mechanical friction, elastic energy storage, and fluid damping—the system can absorb impact energy and significantly improve buffering performance. Attached Figure Description

[0016] Figure 1 This is a perspective view of a heavy-duty chassis for an electric tricycle proposed in this utility model.

[0017] Figure 2 This is a schematic diagram of the low baffle structure of a heavy-duty chassis for an electric tricycle proposed in this utility model.

[0018] Figure 3 This is a half-sectional view of the chassis frame of a heavy-duty electric tricycle proposed in this utility model.

[0019] Figure 4 This is a half-sectional view of the connecting frame of a heavy-duty chassis for an electric tricycle proposed in this utility model;

[0020] Figure 5 This is a half-sectional view of the sliding platform of the heavy-duty chassis of an electric tricycle proposed in this utility model.

[0021] Figure 6 This is a half-sectional view of the connecting platform of the heavy-duty chassis of an electric tricycle proposed in this utility model.

[0022] Figure 7 This is a half-sectional view of the connecting frame of a heavy-duty chassis for an electric tricycle proposed in this utility model.

[0023] Legend:

[0024] 1. Base frame body; 2. Slide plate; 3. Body frame; 4. Fixing bolts; 5. Connecting nuts; 6. Low baffle; 7. Upper baffle; 8. Connecting frame; 9. Slide platform; 10. Connecting platform; 11. Extrusion rod; 12. Fixing rod; 13. Buffer plate; 14. Slide block; 15. Friction plate; 16. Slide rod; 17. Return spring; 18. Adapter rod; 19. Connecting pipe; 20. Return plate; 21. Adapter block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-3This utility model provides an embodiment of a heavy-duty chassis for an electric tricycle, comprising a chassis body 1, a connecting frame 8 fixedly connected to the inner wall of the chassis body 1, a plurality of sliding platforms 9 fixedly connected to the inner wall of the connecting frame 8, a transition rod 18 connected to the inner wall of the sliding platform 9 via a resistance group, a buffer plate 13 rotatably connected to one end of each transition rod 18, a pressing rod 11 connected to the bottom end of the buffer plate 13 via a buffer group, a connecting platform 10 fixedly connected to the inner wall of each sliding platform 9, a connecting pipe 19 fixedly connected to the upper and lower ends of the inner wall of each connecting platform 10, and a resistance group comprising sliding rods 16 fixedly connected to the left and right ends of the inner wall of each sliding platform 9, sliding blocks 14 slidably connected to the outer wall of each sliding rod 16, and the opposite ends of the transition rods 18 rotatably connected to the upper and lower ends of the sliding blocks 14, respectively. (See reference...) Figures 4-6 Friction plates 15 are fixedly connected to both ends of the chute block 14. The outer wall of the friction plate 15 is in close contact with the inner wall of the chute platform 9. The buffer group includes a fixed rod 12 fixedly connected to one end of the buffer plate 13. The fixed rod 12 is fixedly connected to the opposite end of the extrusion rod 11. A return spring 17 is fixedly connected to one end of the buffer plate 13. The other end of the return spring 17 is fixedly connected to the upper and lower ends of the connecting platform 10. A return plate 20 is fixedly connected to one end of the extrusion rod 11. The outer wall of the return plate 20 is sleeved on the inner wall of the connecting pipe 19.

[0027] Specifically: When the upper baffle 7 and the lower baffle 6 are subjected to external compressive load, the buffer plate 13, as the core pressure-bearing component, first disperses the impact stress through its curved structure. At this time, the fixed rod 12, which is rigidly connected to the buffer plate 13, moves downward synchronously, forcing the return spring 17 sleeved on the outside of the fixed rod 12 to undergo axial compression deformation, converting 30%-40% of the impact kinetic energy into elastic potential energy for storage. As the pressure continues to be transmitted, the slide block 14 undergoes directional displacement along the linear guide rail of the slide rod 16. During its movement, it generates dynamic frictional resistance with the ceramic coating surface of the friction plate 15, and through the lever action of the adapter rod 18, converts 15%-20% of the mechanical energy into heat energy for dissipation. Simultaneously, under pressure, the extrusion rod 11 drives the return plate 20 to move towards the bottom of the connecting pipe 19. During this process, the wedge-shaped groove of the return plate 20, with a top width of 8mm and a bottom width of 3mm, forms a gradually narrowing oil channel with the inner wall of the connecting pipe 19, causing the hydraulic oil to generate a gradient of viscous resistance during the return phase. When the return spring 17 releases the rebound force, the fixed rod 12 drives the return plate 20 to move in the opposite direction through the traction mechanism. At this time, the inverted cone structure of the wedge-shaped groove reduces the oil return speed by 40%-60%, forming a hydraulic damping effect. This dual buffer system effectively absorbs 75%-85% of the impact energy through a three-stage energy dissipation mechanism of mechanical friction, elastic energy storage, and fluid damping, significantly improving the overall buffering performance of the device.

[0028] Reference Figure 7The four corners of the outer wall of the base frame body 1 are fixedly connected to the slide plate 2. The upper and lower ends of the slide plate 2 are respectively connected to the upper baffle 7 and the lower baffle 6 through the assembly. The top of the upper baffle 7 is fixedly connected to the vehicle frame 3. The assembly includes the adapter block 21 located at the upper and lower ends of the slide plate 2 and is slidably connected. The opposite ends of the adapter block 21 are fixedly connected to the fixing bolt 4. The outer wall of the fixing bolt 4 is installed with the connecting nut 5.

[0029] Specifically, when assembling the upper baffle 7 and the lower baffle 6, the mating ends of the two must first be precisely aligned with the installation position of the adapter block 21. The operator must ensure that the lower edge of the upper baffle 7 and the upper edge of the lower baffle 6 form a flat mating surface at the adapter block 21. At the same time, the fixing bolts 4 are passed through the pre-designed installation holes in sequence. Then, the connecting nut 5 is rotated clockwise using a special tool so that the precision-machined thread groove on its inner side fully engages with the external thread of the fixing bolt 4. During the tightening process, the connecting nut 5 will generate a uniform axial preload, so that the mating surfaces of the upper baffle 7 and the lower baffle 6 are tightly fitted with the adapter block 21, ensuring that the three form a stable connection structure at the fixing bolts 4. This assembly process requires controlling an appropriate torque value to ensure that the tightness of the connecting parts meets the structural strength requirements without causing excessive compression deformation of the plates. Finally, through this modular connection method, the upper baffle 7 and the lower baffle 6 are reliably fixed at the adapter block 21, providing a strong guarantee for the stability and load-bearing capacity of the overall structure.

[0030] Working principle: After the upper baffle 7 and the lower baffle 6 are respectively connected to the outside of the fixing bolt 4 at the adapter block 21, the connecting nut 5 is rotated so that the connecting nut 5 passes through the inner thread groove, so that the upper baffle 7 and the lower baffle 6 are installed at the fixing bolt 4. When the upper baffle 7 and the lower baffle 6 are subjected to external pressure, the buffer plate 13 buffers the external force. The buffer plate 13 is buffered by the return spring 17 connected to the fixing rod 12. After the return spring 17 generates a rebound force, it causes the sliding block 14 to move at the sliding rod 16. The sliding block 14 is on the friction plate 1. Under the friction effect of 5, the friction plate 15 is pulled down by the adapter rod 18 to offset the buffer plate 13. When the return plate 20 inside the extrusion rod 11 moves inside the connecting pipe 19, the return plate 20 moves to the bottom side of the connecting pipe 19 after being pressed down by the pressure. The fixed rod 12 rebounds and pulls the extrusion rod 11 to move the return plate 20. The wedge-shaped groove at the return plate 20 is larger at the top and smaller at the bottom, which increases the resistance of the oil in the connecting pipe 19 when the return plate 20 flows back. This further offsets the rebound force of the return spring 17, thereby improving the buffering effect of the device.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heavy-duty chassis for an electric tricycle, comprising a chassis body (1), characterized in that: The inner wall of the base frame body (1) is fixedly connected to a connecting frame (8), and the inner wall of the connecting frame (8) is fixedly connected to several sliding platforms (9). The inner wall of the sliding platform (9) is connected to a transition rod (18) through a resistance group. The transition rod (18) is rotatably connected to a buffer plate (13) at one end. The bottom end of the buffer plate (13) is connected to a pressing rod (11) through a buffer group. The inner wall of the sliding platform (9) is fixedly connected to a connecting platform (10). The upper and lower ends of the inner wall of the connecting platform (10) are fixedly connected to a connecting pipe (19). The four corners of the outer wall of the base frame body (1) are fixedly connected to sliding plates (2). The upper and lower ends of the sliding plates (2) are respectively connected to an upper baffle (7) and a lower baffle (6) through an assembly group. The top of the upper baffle (7) is fixedly connected to a vehicle frame (3).

2. The heavy-duty chassis of an electric tricycle according to claim 1, characterized in that: The resistance group includes slide rods (16) fixedly connected to both the left and right ends of the inner wall of the slide platform (9), slide blocks (14) slidably connected to the outer wall of the slide rods (16), and the opposite ends of the adapter rods (18) are rotatably connected to the upper and lower ends of the slide blocks (14).

3. The heavy-duty chassis of an electric tricycle according to claim 2, characterized in that: The front and rear ends of the slide block (14) are fixedly connected with friction plates (15), and the outer wall of the friction plate (15) is in close contact with the inner wall of the slide table (9).

4. The heavy-duty chassis of an electric tricycle according to claim 1, characterized in that: The buffer group includes a fixed rod (12) fixedly connected to one end of the buffer plate (13), and the fixed rod (12) is fixedly connected to the opposite end of the compression rod (11).

5. The heavy-duty chassis of an electric tricycle according to claim 1, characterized in that: Each buffer plate (13) is fixedly connected to a return spring (17) at one end, and the other end of the return spring (17) is fixedly connected to the upper and lower ends of the connecting platform (10).

6. The heavy-duty chassis of an electric tricycle according to claim 1, characterized in that: Each of the extrusion rods (11) is fixedly connected to a return plate (20) at one end, and the outer wall of the return plate (20) is sleeved on the inner wall of the connecting pipe (19).

7. The heavy-duty chassis of an electric tricycle according to claim 1, characterized in that: The assembly includes a transition block (21) that is slidably connected to both the upper and lower ends of the slide plate (2). Each of the transition blocks (21) has a fixing bolt (4) fixedly connected to one of its opposite ends. Each of the fixing bolts (4) has a connecting nut (5) installed on its outer wall.

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