Rear bumper and bottom fork assembly integrated structure and electric bicycle

Abstract

The utility model discloses a rear bumper and bottom fork assembly integrated structure and an electric bicycle, and the rear bumper and bottom fork assembly integrated structure comprises a connecting piece, a left bottom fork pipe and a right bottom fork pipe which are arranged on the connecting piece, and a rear bumper, the front ends of the left bottom fork pipe and the right bottom fork pipe are symmetrically connected to the left end and the right end of the connecting piece, the left end and the right end of the rear protection bar are connected to the rear ends of the left bottom fork pipe and the right bottom fork pipe respectively, and the rear protection bar, the left bottom fork pipe and the right bottom fork pipe are of an integrated structure with the same pipe type. A left fork hook and a right fork hook are symmetrically arranged on the left flat fork pipe and the right flat fork pipe respectively and used for being connected with a rear wheel. The connecting mode of the rear bumper and the bottom fork assembly is optimized, an integrated structure of the rear bumper and the bottom fork assembly is achieved, the strength of the rear bumper and the bottom fork assembly is greatly improved under the condition of vehicle collision, and the requirement for vehicle safety is met. The whole structure is simpler, material specifications and styles are reduced, manufacturing procedures are reduced, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycle technology, and in particular to an integrated structure of a rear guard bar and flat fork assembly and an electric bicycle. Background Technology

[0002] Electric bicycles have become a widely used daily mode of transportation. The frame, as the core structural framework of the entire vehicle, supports the frame and connects various components. As one of the main components of an electric bicycle, its quality directly affects user safety. Its materials, manufacturing processes, and design collectively determine the vehicle's safety, durability, and functional expandability. From basic support to intelligent integration, the frame's role spans the entire lifecycle of the vehicle, requiring performance optimization through a combination of materials science, mechanical design, and manufacturing technology. The main frame is typically constructed from metal tubing or composite materials, formed through welding or die-casting processes. It includes key components such as the main frame, rear swingarm, and rear bumper, forming a complete mechanical load-bearing system. The frame's structural form should meet its requirements in terms of assemblability, rigidity, and strength. The rear swingarm assembly is the main component connecting the rear wheel. The rear bumper, also known as the rear guard or rear anti-collision beam, is a metal protective device installed at the rear of the electric bicycle and is an important part of the vehicle's protection system. Adding a rear bumper structure to the rear swingarm assembly provides protection for the rear wheel, improving driving safety.

[0003] In existing technology, the rear swingarm assembly and the rear bumper structure are two separate parts. The rear bumper is installed and welded onto the rear swingarm assembly. The rear swingarm assembly and the rear bumper have different tubing shapes and are assembled and stacked together. Due to the non-integrated molding design, the overall structural strength is poor, posing a driving safety hazard. In addition, this design structure has complex connections, multiple tubing specifications, many processes, and low production efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing an integrated structure for the rear guard bar and flat fork assembly, and an electric bicycle.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] In a first aspect, a rear bumper swingarm assembly integrated structure is provided, including a connector and a left swingarm tube and a right swingarm tube disposed on the connector. The structure is characterized by further including a rear bumper, with the front ends of the left and right swingarm tubes symmetrically connected to the left and right ends of the connector, and the left and right ends of the rear bumper respectively connected to the rear ends of the left and right swingarm tubes. The rear bumper, left swingarm tube, and right swingarm tube are an integrated structure with the same tube shape. A left fork hook and a right fork hook are symmetrically disposed on the left and right swingarm tubes for connecting to the rear wheel.

[0007] Furthermore, a rear mudguard mounting portion is provided on the left and right horizontal fork tubes respectively, and the rear mudguard mounting portion includes a rear mudguard mounting hole.

[0008] Furthermore, several wire harness fixing rings are provided on the left or right flat fork tube.

[0009] Furthermore, the front ends of the left and right flat fork tubes are respectively provided with a first frame connection part and a second frame connection part, and the first frame connection part and the second frame connection part are rotatably connected to the frame.

[0010] Furthermore, the left and right forks are respectively provided with a first U-shaped groove and a second U-shaped groove for mounting the rear wheel.

[0011] Furthermore, the left and right horizontal fork tubes are respectively provided with a first shock absorber connecting plate and a second shock absorber connecting plate.

[0012] Furthermore, the first shock absorber connecting plate and the second shock absorber connecting plate are symmetrically arranged above the left fork hook and the right fork hook, respectively.

[0013] Furthermore, the first shock absorber connecting plate and the second shock absorber connecting plate are respectively provided with a first hook bolt and a second hook bolt for connecting the rear shock absorber.

[0014] Furthermore, a brake lever is provided on the left fork hook for connecting to the braking system.

[0015] In a second aspect, an electric bicycle is provided, characterized in that: it includes an integrated structure of a frame and the rear bumper and fork assembly described in the first aspect, wherein the frame and the integrated structure of the rear bumper and fork assembly are connected.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The connection between the rear bumper and the swingarm assembly has been optimized, achieving an integrated structure. This significantly improves the strength of both components in the event of a vehicle collision, meeting vehicle safety requirements. The overall structure is simpler, reducing material specifications and manufacturing processes, thus improving production efficiency. The product also boasts a more streamlined and aesthetically pleasing appearance.

[0018] Other features and advantages of this invention will be set forth in the following description or may be learned by practicing this invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0020] In the diagram: 1-Connector, 2-Left flat fork tube, 3-Right flat fork tube, 4-Rear guard bar, 5-Left fork hook, 6-Right fork hook, 7-Rear mudguard mounting part, 8-Rear mudguard mounting hole, 9-Wire harness fixing ring, 10-First frame connection part, 11-Second frame connection part, 12-First U-groove, 13-Second U-groove, 14-First shock absorber connecting plate, 15-Second shock absorber connecting plate, 16-First fork hook bolt, 17-Second fork hook bolt, 18-Brake post. Detailed Implementation

[0021] To enhance understanding of this utility model, we will now describe it in further detail with reference to the accompanying drawings. This embodiment is only used to explain this utility model and does not constitute a limitation on the scope of protection of this utility model.

[0022] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figure 1As shown, a rear bumper swingarm assembly integrated structure includes a connector 1, a left swingarm tube 2 and a right swingarm tube 3 disposed on the connector 1, and a rear bumper 4. The front ends of the left swingarm tube 2 and the right swingarm tube 3 are symmetrically connected to the left and right ends of the connector 1, and the left and right ends of the rear bumper 4 are respectively connected to the rear ends of the left swingarm tube 2 and the right swingarm tube 3. The rear bumper 4, the left swingarm tube 2, and the right swingarm tube 3 are an integrated structure with the same tube shape. A left fork hook 5 and a right fork hook 6 are symmetrically disposed on the left swingarm tube 2 and the right swingarm tube 3, respectively, for connecting the rear wheel.

[0026] Specifically, through structural optimization, the original three parts and two types of tubing—the left flat fork tube, the right flat fork tube, and the rear guard bar—are optimized into a single unit. The original flat fork tube and rear guard bar tube structures are merged to achieve an integrated structural product design. This allows only one type of tubing to meet the structural requirements, significantly improving the strength under vehicle collision conditions and meeting vehicle safety requirements.

[0027] Preferably, a rear mudguard mounting portion 7 is provided on the left swingarm tube 2 and the right swingarm tube 3, respectively. The rear mudguard mounting portion 7 includes a rear mudguard mounting hole 8, which enables the assembly and fixation of the rear mudguard. Several wire harness fixing rings 9 are provided on the right swingarm tube 3 for fixing the motor wire harness. The front ends of the left swingarm tube 2 and the right swingarm tube 3 are respectively provided with a first frame connecting portion 10 and a second frame connecting portion 11. The first frame connecting portion 10 and the second frame connecting portion 11 are rotatably connected to the frame, realizing the connection with the frame body.

[0028] Preferably, the left fork hook 5 and the right fork hook 6 are respectively provided with a first U-shaped groove 12 and a second U-shaped groove 13 for mounting the rear wheel. The rear wheel is connected by engaging the first U-shaped groove 12 and the second U-shaped groove 13, and the rear wheel axle is engaged in the first U-shaped groove 12 and the second U-shaped groove 13 to achieve a rotatable connection between the rear wheel and the integrated structure of the rear guard bar flat fork assembly.

[0029] A first shock absorber connecting plate 14 and a second shock absorber connecting plate 15 are respectively provided on the left swingarm tube 2 and the right swingarm tube 3. The first shock absorber connecting plate 14 and the second shock absorber connecting plate 15 are symmetrically arranged above the left fork hook 5 and the right fork hook 6, respectively. A first fork hook bolt 16 and a second fork hook bolt 17 are respectively provided on the first shock absorber connecting plate 14 and the second shock absorber connecting plate 15 for connecting the rear shock absorber. After the integrated structure of the rear guard bar swingarm assembly is installed on the frame body, the rear shock absorber is rotatably connected to the first fork hook bolt 16 and the second fork hook bolt 17 to achieve the connection and cooperation between the integrated structure of the rear guard bar swingarm assembly and the rear shock absorber.

[0030] The left fork hook 5 is equipped with a brake lever 18 for connecting to the braking system. The brake lever 18 cooperates with the U-shaped limiting groove reserved in the drum brake cover to limit the rotation of the drum brake.

[0031] Example 2

[0032] An electric bicycle includes a frame and a rear bumper and fork assembly integrated into one structure as described in Embodiment 1, wherein the frame and the rear bumper and fork assembly are connected to each other.

[0033] The above specific embodiments are only for illustrating the technical concept and structural features of this utility model, and are intended to enable those skilled in the art to implement them. However, the above content does not limit the protection scope of this utility model. Any equivalent changes or modifications made in accordance with the spirit and essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. An integrated structure for a rear bumper swingarm assembly, comprising a connector (1), and a left swingarm tube (2) and a right swingarm tube (3) disposed on the connector (1), characterized in that: It also includes a rear bumper (4). The front ends of the left horizontal fork tube (2) and the right horizontal fork tube (3) are symmetrically connected to the left and right ends of the connector (1). The left and right ends of the rear bumper (4) are respectively connected to the rear ends of the left horizontal fork tube (2) and the right horizontal fork tube (3). The rear bumper (4), the left horizontal fork tube (2), and the right horizontal fork tube (3) are an integral structure with the same tube shape. The left horizontal fork tube (2) and the right horizontal fork tube (3) are symmetrically provided with left fork hooks (5) and right fork hooks (6) for connecting the rear wheel.

2. The integrated structure of the rear bumper guard fork assembly according to claim 1, characterized in that: A rear mudguard mounting part (7) is provided on the left flat fork tube (2) and the right flat fork tube (3), and the rear mudguard mounting part (7) includes a rear mudguard mounting hole (8).

3. The integrated structure of the rear bumper guardrail assembly according to claim 1, characterized in that: Several wire harness fixing rings (9) are provided on the left flat fork tube (2) or the right flat fork tube (3).

4. The integrated structure of the rear bumper guardrail assembly according to claim 1, characterized in that: The front ends of the left flat fork tube (2) and the right flat fork tube (3) are respectively provided with a first frame connection part (10) and a second frame connection part (11), and the first frame connection part (10) and the second frame connection part (11) are rotatably connected to the frame.

5. The integrated structure of the rear bumper guard fork assembly according to claim 1, characterized in that: The left fork hook (5) and the right fork hook (6) are respectively provided with a first U-shaped groove (12) and a second U-shaped groove (13) for installing the rear wheel.

6. The integrated structure of the rear bumper horizontal fork assembly according to claim 1, characterized in that: The left horizontal fork tube (2) and the right horizontal fork tube (3) are respectively provided with a first shock absorber connecting plate (14) and a second shock absorber connecting plate (15).

7. The integrated structure of the rear bumper horizontal fork assembly according to claim 6, characterized in that: The first shock absorber connecting plate (14) and the second shock absorber connecting plate (15) are respectively symmetrically arranged above the left fork hook (5) and the right fork hook (6).

8. The integrated structure of the rear bumper horizontal fork assembly according to claim 7, characterized in that: The first shock absorber connecting plate (14) and the second shock absorber connecting plate (15) are respectively provided with a first hook bolt (16) and a second hook bolt (17) for connecting the rear shock absorber.

9. The integrated structure of the rear bumper horizontal fork assembly according to claim 1, characterized in that: The left fork hook (5) is equipped with a brake post (18) for connecting the braking system.

10. An electric bicycle, characterized in that: The vehicle includes an integrated structure of a frame and a rear bumper swingarm assembly as described in any one of claims 1-9, wherein the frame and the integrated structure of the rear bumper swingarm assembly are connected.

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