Power-assisted electric bicycle frame

Abstract

The utility model discloses a power-assisted electric bicycle frame which comprises a main frame, a tail fork, a seat frame and a battery box. A mounting groove is formed in the upper side of the left end of the main frame, the seat frame and the main frame are fixedly connected through the mounting groove, the lower side of the left end of the main frame is rotationally connected with the tail fork, and the right end of the main frame is rotationally connected with the battery box; the tail fork is integrally arranged in a U shape, two arms of the tail fork face leftwards, open grooves for installing rear wheels are formed in the two arms of the tail fork, and the right end of the tail fork is rotationally connected with the main frame through a rotating shaft; the seat frame comprises two supporting plates, the upper ends of the two supporting plates are fixedly connected with the same seat tube, and a connecting plate is fixedly connected between the two supporting plates; a head tube is arranged on the right side of the battery box, and the battery box is hollow. According to the utility model, the assembly is more labor-saving and more convenient, the stress uniformity of the front wheel and the rear wheel is better during riding, and the stability during riding is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric bicycles, in particular to a frame of a power-assisted electric bicycle. Background Technique

[0002] An electric bicycle refers to a new type of vehicle that integrates a "triple sensing system" centered on a torque sensor, equipped with a cadence sensor and a speed sensor, on the basis of an ordinary bicycle. The sensor system can accurately sense the pedaling force, cadence and vehicle speed of the rider during the riding process, and process the triple data through an algorithm, and finally control the motor to output the power that meets the needs of the rider, making the riding process easy and labor-saving.

[0003] The manufacturing process of ordinary electric bicycles uses bent pipe welding, which is inconvenient for assembling electric bicycles. Moreover, the battery box on the existing electric bicycle is generally arranged on the lower side of the seat frame. Due to the large overall weight of the battery box and the weight of the rider himself, during riding, the overall load of the vehicle needs to be supported by the rear wheels of the vehicle, which puts a greater pressure on the rear wheels, the front wheels are less stressed, and the center of gravity is biased to the rear, resulting in poor force uniformity and low riding stability.

[0004] Therefore, we propose a frame of a power-assisted electric bicycle to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a frame of a power-assisted electric bicycle to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A frame of a power-assisted electric bicycle includes a main frame, a rear fork, a seat frame and a battery box; an installation groove is provided on the upper side of the left end of the main frame, the seat frame is fixedly connected to the main frame through the installation groove, the lower side of the left end of the main frame is rotatably connected to the rear fork, and the right end of the main frame is rotatably connected to the battery box; the rear fork is integrally U-shaped, the two arms of the rear fork face left, and slots for installing the rear wheels are provided on both arms of the rear fork, and the right end of the rear fork is rotatably connected to the main frame through a rotating shaft; the seat frame includes two support plates, a seat tube is fixedly connected to the upper ends of the two support plates, and a connecting plate is fixedly connected between the two support plates; a head tube is provided on the right side of the battery box, the battery box is hollow, and the battery box is rotatably connected to the main frame through a rotating shaft.

[0008] Further, a buffer telescopic rod is rotatably connected to the upper end of the rear fork, and the upper end of the buffer telescopic rod is rotatably connected to the lower side of the seat frame.

[0009] Further, a buckle is provided on the main frame, and a latch block matching the buckle is provided on the battery box.

[0010] Further, electrode connectors are provided at the part where the main frame is connected to the battery box.

[0011] Further, a through hole for installing a bicycle pedal rod is provided through the tail fork.

[0012] Further, a support block for installing a kickstand is fixedly connected to the lower end of the tail fork.

[0013] Compared with the prior art, the beneficial effects of the present utility model are at least as follows:

[0014] 1. By providing a battery box, a seat frame and a tail fork, the battery box is arranged at the front side of the overall electric bicycle, and the seat frame is arranged at a position closer to the middle of the overall electric bicycle. When riding, the weights of the rider and the battery box are basically evenly supported by the front wheel and the rear wheel, and the force uniformity of the front and rear wheels is better, increasing the stability during riding.

[0015] 2. By providing a main frame, a tail fork, a seat frame and a battery box, the overall electric bicycle is composed of these four parts. When assembling, assembling these four parts can complete the assembly of the frame, without the need for additional welding, reducing the assembly time, being more labor-saving and convenient for assembly.

[0016] The present utility model is more labor-saving and convenient for assembly, and when riding, the force uniformity of the front and rear wheels is better, increasing the stability during riding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view structural schematic diagram of the present utility model;

[0018] Figure 2 is a rear view structural schematic diagram of the present utility model;

[0019] Figure 3 is an exploded structural view of the present utility model;

[0020] Figure 4 is a structural schematic diagram of the main frame in the present utility model;

[0021] Figure 5 is a structural schematic diagram of the battery box in the present utility model when unfolded.

[0022] As shown in the figure: 1, main frame; 2, tail fork; 3, seat frame; 4, battery box; 5, slotted hole; 6, support plate; 7, seat tube; 8, connecting plate; 9, head tube; 10, buffer telescopic rod; 11, buckle; 12, latch block; 13, electrode connector; 14, through hole; 15, support block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will describe the present utility model in detail in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present utility model, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present utility model.

[0024] Please refer to Figures 1 to 5 , a frame of an assisted electric bicycle, which includes a main frame 1, a rear fork 2, a seat frame 3, and a battery box 4;

[0025] In this embodiment, an installation groove is provided on the upper side of the left end of the main frame 1. The seat frame 3 is fixedly connected to the main frame 1 through the installation groove. The lower side of the left end of the main frame 1 is rotatably connected to the rear fork 2, and the right end of the main frame 1 is rotatably connected to the battery box 4. It is worth mentioning that a buckle 11 is provided on the main frame 1, and a latch 12 matching the buckle 11 is provided on the battery box 4. It should be noted that an electrode connector 13 is provided at the part where the main frame 1 is connected to the battery box 4;

[0026] In this embodiment, the rear fork 2 is integrally U-shaped, the two arms of the rear fork 2 face leftward, and installation slots 5 for installing the rear wheel are provided on both arms of the rear fork 2. The right end of the rear fork 2 is rotatably connected to the main frame 1 through a rotating shaft. It should be noted that a buffer telescopic rod 10 is rotatably connected to the upper end of the rear fork 2, and the upper end of the buffer telescopic rod 10 is rotatably connected to the lower side of the seat frame 3. Further, a through hole 14 for installing a bicycle pedal rod is provided through the rear fork 2. It should be noted that a support block 15 for installing a footrest is fixedly connected to the lower end of the rear fork 2;

[0027] In this embodiment, the seat frame 3 includes two support plates 6. The upper ends of the two support plates 6 are fixedly connected to the same seat tube 7, and a connecting plate 8 is fixedly connected between the two support plates 6;

[0028] A head tube 9 is provided on the right side of the battery box 4. The battery box 4 is hollow, and the battery box 4 is rotatably connected to the main frame 1 through a rotating shaft.

[0029] In this embodiment, the rear wheel is installed at the installation slot 5 on the rear fork 2, the pedal rod is installed at the through hole 14, the seat cushion is installed at the seat tube 7, the battery is installed in the battery box 4 and connected to the electrode connector 13, and the front wheel and the handle are installed at the head tube 9 to complete the installation of the electric bicycle.

[0030] It should be understood that although this specification is described according to embodiments, not every embodiment only includes an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0031] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the present utility model, and they are not intended to limit the protection scope of the present utility model. Any equivalent implementation modes or changes made without departing from the technical spirit of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An assistive electric bicycle frame, characterized in that: It includes a main frame (1), a rear fork (2), a seat frame (3) and a battery box (4); An installation groove is provided on the upper side of the left end of the main frame (1). The seat frame (3) is fixedly connected to the main frame (1) through the installation groove. The lower side of the left end of the main frame (1) is rotatably connected to the rear fork (2), and the right end of the main frame (1) is rotatably connected to the battery box (4); The rear fork (2) is integrally U-shaped. The two arms of the rear fork (2) face left. Grooves (5) for installing the rear wheel are provided on both arms of the rear fork (2). The right end of the rear fork (2) is rotatably connected to the main frame (1) through a rotating shaft; The seat frame (3) includes two support plates (6). A same seat tube (7) is fixedly connected to the upper ends of the two support plates (6). A connecting plate (8) is fixedly connected between the two support plates (6); A head tube (9) is provided on the right side of the battery box (4). The battery box (4) is hollow. The battery box (4) is rotatably connected to the main frame (1) through a rotating shaft.

2. The frame of a power-assisted electric bicycle according to claim 1, characterized in that: A buffer telescopic rod (10) is rotatably connected to the upper end of the rear fork (2). The upper end of the buffer telescopic rod (10) is rotatably connected to the lower side of the seat frame (3).

3. The frame of a power-assisted electric bicycle according to claim 1, wherein: A buckle (11) is provided on the main frame (1). A latch block (12) matching the buckle (11) is provided on the battery box (4).

4. A frame of a power-assisted electric bicycle according to claim 1, wherein: An electrode connector (13) is provided at the part where the main frame (1) is connected to the battery box (4).

5. A frame of a power-assisted electric bicycle according to claim 1, characterized in that: A through hole (14) for installing a bicycle pedal rod is provided through the rear fork (2).

6. The frame of a power-assisted electric bicycle according to claim 1, characterized in that: A support block (15) for installing a kickstand is fixedly connected to the lower end of the rear fork (2).

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