A tricycle macro-beam structure

Abstract

The present application relates to the technical field of tricycle frame, specifically to a tricycle large frame beam structure, comprising a large frame beam body, a front fixed support and a rear fixed support are fixed at the front end of the large frame beam body, a steel plate spring is installed between the front fixed support and the rear fixed support; a weight reduction hole and a mounting positioning hole are arranged on the beam body of the large frame beam body, a reinforcing rib structure is arranged at the stress concentration area of the large frame beam body, in the present application, the welding stress concentration and the welding cracking risk of the traditional welded frame are completely eliminated through the integral stamping forming welding-free integral structure; the bending resistance, the torsion resistance and the fatigue resistance of the beam body are significantly improved through the reinforcing rib design of the stress concentration area, the carrying capacity is stronger, and the service life of the whole vehicle is greatly prolonged.

Description

Technical Field

[0001] This invention relates to the field of tricycle frame technology, and more particularly to a tricycle frame beam structure. Background Technology

[0002] Three-wheeled vehicles, commonly used for short-distance transportation and daily commuting in urban and rural areas, possess advantages such as strong load-bearing capacity and low operating costs, making them widely applicable. The frame beam is the core load-bearing component of the three-wheeled vehicle, providing the mounting base for all other vehicle components, including the suspension system, powertrain, cargo box, and skid plates. Its structural strength, deformation resistance, and stability directly determine the three-wheeled vehicle's load-bearing capacity, driving safety, and service life. Currently, three-wheeled vehicle frame beams are mostly constructed by welding and splicing multiple sections of ordinary steel, resulting in the following significant defects: Significant safety hazards: Stress concentration easily occurs at the welded areas. Under prolonged exposure to alternating loads on bumpy roads, the welds are prone to cracking and deformation, potentially leading to frame failure and posing a major safety hazard. This also significantly shortens the frame's service life. Poor connection stability: The mounting brackets for the leaf springs are mostly welded to the frame beam, directly applying the suspension system's load to the welded joints. Long-term use can lead to bracket detachment and weld tearing. The problems directly affect the stability of the vehicle; excessive weight leads to high energy consumption: to compensate for the weakness of the welded structure, it is often necessary to increase the thickness of the steel or add additional reinforcing structures, resulting in excessive weight of the frame and increased energy consumption of the vehicle. For electric tricycles, this will directly shorten the overall range; low production efficiency and poor consistency: the welding process requires multiple clamping, welding, correction and grinding steps, the production process is long and inefficient, and the welding quality is highly dependent on manual operation. It is difficult to guarantee the dimensional accuracy and consistency of the products, and the yield rate fluctuates greatly, making it unsuitable for standardized mass production. Summary of the Invention

[0003] The purpose of this invention is to solve the technical problems mentioned in the background section.

[0004] The present invention adopts the following technical solution: a three-wheeled vehicle frame beam structure, including a frame beam body, a front fixed bracket and a rear fixed bracket fixed at the front end of the frame beam body, and a steel leaf spring installed between the front fixed bracket and the rear fixed bracket; the beam body of the frame beam body is provided with weight reduction holes and installation positioning holes, and the stress concentration area of ​​the frame beam body is provided with a reinforcing rib structure.

[0005] Preferably, the front fixed bracket and the rear fixed bracket are integrally stamped with the main beam body, or are detachably fixed to the main beam body by high-strength bolts.

[0006] Preferably, the reinforcing rib structure includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib is disposed in the connection area between the front fixed support, the rear fixed support and the main beam body, and the second reinforcing rib is disposed in the middle load-bearing area of ​​the main beam body.

[0007] Preferably, the weight-reducing holes include circular holes, triangular holes, and irregularly shaped hollow holes. The weight-reducing holes are evenly distributed along the length of the main beam body, and their positions avoid stress concentration areas of the beam body.

[0008] Preferably, the mounting and positioning holes include powertrain mounting holes, cargo box fixing holes, wiring harness mounting holes, and protective plate mounting holes, with each mounting and positioning hole corresponding to the assembly position of each component of the tricycle.

[0009] Preferably, the two ends of the leaf spring are respectively hinged to the front fixed bracket and the rear fixed bracket via pins, and the upper surface of the leaf spring is provided with a buffer rubber pad.

[0010] Preferably, the main beam body is integrally stamped from 510 hot-formed steel, forming a weld-free, monolithic structure.

[0011] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0012] 1. In this invention, the integral stamping and forming of the weldless whole structure completely eliminates the risk of stress concentration and weld cracking in traditional welded frames; with the reinforcement design in the stress concentration area, the bending, torsion and fatigue resistance of the beam is significantly improved, the load-bearing capacity is stronger, and the service life of the whole vehicle is greatly extended.

[0013] 2. In this invention, the front and rear fixed brackets are integrally formed with the main frame body or are detachably connected by bolts, which replaces the traditional welding fixation, eliminates the risk of bracket welding points falling off or tearing, ensures the long-term stability of the suspension system, and improves the safety of vehicle driving.

[0014] 3. In this invention, by using a reasonable layout of weight-reducing holes, the weight of the beam is reduced while ensuring structural strength, which effectively reduces the vehicle's driving energy consumption and can significantly improve the driving range for electric tricycles. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a three-wheeled vehicle frame structure proposed in this invention;

[0016] Figure 2 This invention provides a rear view schematic diagram of a three-wheeled vehicle frame structure;

[0017] Figure 3 This invention provides a bottom view schematic diagram of a three-wheeled vehicle frame structure.

[0018] Legend:

[0019] 1. Main frame beam body; 2. Rear fixed bracket; 3. Front fixed bracket; 4. Steel leaf spring; 5. Reinforcing rib one; 6. Reinforcing rib two; 7. Weight reduction hole; 8. Mounting positioning hole. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Example 1

[0023] Please see Figure 1-3 This invention provides a technical solution: a tricycle frame structure, including a frame body 1, which is a long strip-shaped core load-bearing beam, integrally stamped from 510 hot-formed steel with a thickness of 4mm, and is a weld-free integral structure, completely eliminating the risk of weld cracking in traditional welded structures. The structural strength is much higher than that of ordinary welded frames. The front end of the frame body 1 is fixed with a front fixed bracket 3 and a rear fixed bracket 2. A leaf spring 4 is installed between the front fixed bracket 3 and the rear fixed bracket 2. The leaf spring 4 is the suspension elastic element of the tricycle, used to buffer road bumps and transmit the force of the vehicle body and load. The beam body of the frame body 1 has weight-reducing holes 7 and mounting positioning holes 8. The stress concentration areas of the frame body 1 are provided with reinforcing rib structures.

[0024] The front fixed bracket 3 and the rear fixed bracket 2 are integrally stamped with the main beam body 1, or can be detachably fixed to the main beam body 1 by high-strength bolts.

[0025] The reinforcing rib structure includes reinforcing rib 1 (5) and reinforcing rib 2 (6). Reinforcing rib 1 (5) is located in the connection area between the front fixed bracket 3, the rear fixed bracket 2 and the main beam body 1. It is used to improve the load-bearing capacity of the suspension mounting position and prevent deformation caused by long-term alternating loads. Reinforcing rib 2 (6) is located in the middle load-bearing area of ​​the main beam body 1. It is used to optimize the stress distribution of the beam as a whole, improve the bending and torsional resistance of the beam, and enhance the load-bearing capacity of the whole vehicle.

[0026] The two ends of the leaf spring 4 are hinged to the front fixed bracket 3 and the rear fixed bracket 2 respectively through pins, which makes disassembly and maintenance convenient and installation stable. The upper surface of the leaf spring 4 is provided with a buffer pad, which can further reduce vibration and impact during driving.

[0027] Example 2

[0028] Please see Figure 1-3 The weight reduction holes 7 include circular holes, triangular holes and irregularly shaped hollow holes. The weight reduction holes 7 are evenly distributed along the length of the main beam body 1, and the opening position avoids the stress concentration area of ​​the beam body. Under the premise of ensuring the structural strength of the beam body, the self-weight of the beam body is effectively reduced, and lightweight design is achieved.

[0029] The mounting positioning holes 8 include powertrain mounting holes, cargo box fixing holes, wiring harness mounting holes, and skid plate mounting holes. Each mounting positioning hole 8 corresponds to the assembly position of each component of the tricycle, providing a standardized assembly interface for each component of the vehicle and greatly improving the assembly efficiency of the entire vehicle.

[0030] The main beam body 1 is made of 510 hot-formed steel and is a one-piece stamped structure that does not require welding.

[0031] Working principle: The main frame beam 1, as the core load-bearing component of the vehicle, adopts a one-piece stamped structure of 510 hot-formed steel without welding, and is reinforced with a rib structure, which greatly improves the structural strength and resistance to deformation and fatigue; the front fixed bracket 3 and the rear fixed bracket 2 are used to stably install the leaf spring 4, replacing the traditional welding fixing method, eliminating the risk of bracket cracking and falling off, and ensuring the working stability of the suspension system; the weight reduction holes 7 of the beam body realize lightweight design and reduce vehicle driving energy consumption; the mounting positioning holes 8 provide standardized assembly interfaces for various components of the vehicle, improving assembly efficiency and product versatility.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A three-wheeled vehicle frame structure, comprising a frame body (1), characterized in that: The front end of the main beam body (1) is fixed with a front fixed bracket (3) and a rear fixed bracket (2), and a steel leaf spring (4) is installed between the front fixed bracket (3) and the rear fixed bracket (2); the beam body of the main beam body (1) is provided with a weight reduction hole (7) and an installation positioning hole (8), and a reinforcing rib structure is provided in the stress concentration area of ​​the main beam body (1).

2. The tricycle frame structure according to claim 1, characterized in that: The front fixed bracket (3) and the rear fixed bracket (2) are integrally stamped with the main beam body (1), or can be detachably fixed to the main beam body (1) by high-strength bolts.

3. The tricycle frame structure according to claim 1, characterized in that: The reinforcing rib structure includes a first reinforcing rib (5) and a second reinforcing rib (6). The first reinforcing rib (5) is located in the connection area between the front fixed support (3), the rear fixed support (2) and the main beam body (1). The second reinforcing rib (6) is located in the middle bearing area of ​​the main beam body (1).

4. The tricycle frame structure according to claim 1, characterized in that: The weight-reducing holes (7) include circular holes, triangular holes and irregularly shaped hollow holes. The weight-reducing holes (7) are evenly distributed along the length of the main beam body (1), and their positions avoid stress concentration areas of the beam body.

5. The tricycle frame structure according to claim 1, characterized in that: The mounting positioning holes (8) include powertrain mounting holes, carriage fixing holes, wiring harness mounting holes, and guard plate mounting holes. Each mounting positioning hole (8) is set according to the assembly position of each component of the tricycle.

6. The tricycle frame structure according to claim 1, characterized in that: The two ends of the leaf spring (4) are respectively hinged to the front fixed bracket (3) and the rear fixed bracket (2) by pins, and the upper surface of the leaf spring (4) is provided with a buffer rubber pad.

7. The tricycle frame structure according to claim 1, characterized in that: The main beam body (1) is made of 510 hot-formed steel and is a one-piece stamped structure that does not require welding.

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