Frame lower pipe for lithium battery power-assisted bicycle

Abstract

The utility model belongs to the technical field of electric power-assisted bicycles, and particularly relates to a frame lower pipe for a lithium battery power-assisted bicycle, which comprises a frame lower pipe body and a driving mechanism clamping seat, and a battery box is fixedly arranged in the frame lower pipe body and the driving mechanism clamping seat; the battery box comprises a first battery mounting box arranged in the frame lower tube body and a second battery mounting box arranged in the driving mechanism clamping seat; the motor base, the frame lower tube body, the battery cover and the like are designed into a whole, the structure is more attractive and more integrated, the strength is better, the battery box is divided into two parts, the first part is arranged to be of a structure attached to the frame lower tube body, the second part is arranged to be of an arc-shaped structure attached to the motor base, and the two parts are combined to form a whole. The internal space of the battery box is larger, 40 21700 type battery cells can be contained, the maximum capacity of the whole battery box 3 can reach 960 Wh, and therefore the endurance mileage of the electric vehicle is farther.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric assist bicycles, and particularly relates to a down tube of a lithium battery assist bicycle frame. Background Art

[0002] An assist bicycle is a new type of two-wheeled vehicle, which belongs to a kind of bicycle. It uses a battery as an auxiliary power source, is equipped with a motor, and has a power assist system. It is a new type of transportation that can realize the integration of human-powered riding and motor-assisted driving. Generally, the batteries of the existing assist bicycles on the market are installed in an external or semi-hidden installation method, that is, the whole battery is in a completely exposed or semi-exposed state. This installation method not only affects the beauty of the whole vehicle, but also the battery is easily damaged due to being knocked. Content of the Utility Model

[0003] The utility model provides a down tube of a lithium battery assist bicycle frame to solve the problems raised in the above background art.

[0004] To achieve the above object, the utility model provides the following technical solution: A down tube of a lithium battery assist bicycle frame includes a down tube body of the frame and a driving mechanism card seat. The down tube body of the frame and the driving mechanism card seat are integrally formed. A battery box is fixedly arranged inside the down tube body of the frame and the driving mechanism card seat, and a reinforcing plate is fixedly arranged inside the battery box.

[0005] Among them, the driving mechanism card seat includes an arc-shaped card seat that matches an external driving mechanism.

[0006] The battery box includes a first battery installation box arranged inside the down tube body of the frame and a second battery installation box arranged inside the arc-shaped card seat. The interiors of the first battery installation box and the second battery installation box both have battery cavities for installing batteries and communicating with each other.

[0007] Preferably, the shape and structure of the first battery installation box match the shape and structure of the down tube body of the frame, and it is arranged to fit the inner wall of the down tube body of the frame.

[0008] Preferably, the shape and structure of the second battery installation box match the shape and structure of the driving mechanism card seat, and it is arranged to fit the inside of the driving mechanism card seat.

[0009] Preferably, the interiors of the down tube body of the frame and the driving mechanism card seat have a wire routing cavity communicating with each other.

[0010] Preferably, a power supply hole is opened on the side wall of one end of the down tube body of the frame away from the driving mechanism card seat, and a lock hole is opened on the side wall of one end of the driving mechanism card seat away from the power supply hole.

[0011] Preferably, one end of the frame down tube body away from the driving mechanism card seat is fixedly provided with a head tube connection end connected to an external frame head tube.

[0012] Preferably, one end of the driving mechanism card seat away from the frame down tube body is fixedly provided with a rear fork connection end connected to an external frame rear fork.

[0013] Preferably, the driving mechanism includes a driving motor or a driving motor.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] 1. The present utility model integrates the motor (motor) seat, the frame down tube body, the battery cover, etc. into a whole, making the battery box an integral part of the frame. It is more beautiful and integral in structure, and the strength is better. The battery box is divided into two parts. The first part is designed to fit the frame down tube body, and the second part is designed to fit the arc-shaped structure of the motor (motor) seat. The combination of the two parts of the battery box makes the internal space of the battery box larger, and it can accommodate 40 21700 model battery cells, so that the maximum capacity of the entire battery box 3 can reach 960 Wh, thereby making the cruising range of the electric vehicle farther;

[0016] 2. The motor (motor) seat and the frame down tube are designed as an integrally formed structure. This design structure has lower requirements for the welding accuracy of the frame compared with the ordinary fully hidden battery, and simplifies the assembly process of the frame down tube and the motor seat. The assembly is also simpler, improving production efficiency while taking into account the quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is an axonometric structural diagram of the present utility model;

[0020] Figure 3 is another axonometric structural diagram of the present utility model;

[0021] Figure 4 is yet another axonometric structural diagram of the present utility model;

[0022] Figure 5 is a bottom view structural diagram of the present utility model.

[0023] In the figure: 1. Frame down tube body; 101. Power supply hole; 11. Head tube connection end; 2. Driving mechanism card seat; 21. Rear fork connection end; 22. Arc-shaped card seat; 3. Battery box; 31. First battery installation box; 32. Second battery installation box; 4. Reinforcement plate. Detailed implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-5 , the present invention provides the following technical solutions: A frame down tube for a lithium battery assisted bicycle, including a frame down tube body 1, a driving mechanism card seat 2 and a battery box 3.

[0026] Among them, both the frame down tube body 1 and the driving mechanism card seat 2 are of hollow structures inside, forming a battery box 3 for accommodating battery installation, and the two are integrally formed, and the internal spaces are connected to each other, forming a battery box 3 with a larger internal space compared to the ordinary fully hidden battery box in the prior art. More battery cells of the same model can be accommodated, specifically, the maximum capacity of the entire battery box 3 can reach 960 Wh, so that the electric vehicle has a longer cruising range.

[0027] In this embodiment, 40 21700 model battery cells can be selected. There are screw holes reserved in the battery box 3, which can be used for pre-installing the battery in the battery box 3 inside the frame down tube body 1 and the driving mechanism card seat 2 before assembling the frame.

[0028] Furthermore, reinforcement plates 4 as shown in Figures 2-5 are provided inside the battery boxes 3 of the frame down tube body 1 and the driving mechanism card seat 2. The setting of the reinforcement plates 4 can improve the overall structural strength of the frame down tube body 1 and the driving mechanism card seat 2.

[0029] Furthermore, the driving mechanism card seat 2 includes an arc-shaped card seat 22 that matches the external driving mechanism. During installation, it is pressed above the external driving mechanism. In this embodiment, since the frame down tube body 1 and the driving mechanism card seat 2 are integrally formed, the battery cavity and the wiring cavity inside the frame down tube body 1 are both connected to the battery cavity and the wiring cavity inside the driving mechanism card seat 2 to form an interconnected battery installation space.

[0030] As shown in Figures 4-5As shown, the battery box 3 includes a first battery installation box 31 disposed inside the lower tube body 1 of the frame and a second battery installation box 32 disposed inside the driving mechanism card holder 2. The interiors of the first battery installation box 31 and the second battery installation box 32 both have a battery cavity for installing batteries and communicating with each other, and a wiring cavity separated from the battery cavity by a reinforcing plate 4 and communicating with each other.

[0031] Furthermore, the shape and structure of the first battery installation box 31 match the shape and structure of the lower tube body 1 of the frame, and it is arranged to fit against the inner wall of the lower tube body 1 of the frame; the shape and structure of the second battery installation box 32 match the shape and structure of the driving mechanism card holder 2, and it is arranged to fit against the inside of the driving mechanism card holder 2.

[0032] In this way, the battery cavity inside the interconnected first battery installation box 31 and second battery installation box 32 can increase the battery loading space, so as to install a larger number of batteries, further increasing the cruising range of the electric assist bicycle. Moreover, the hidden design of the battery box 3 has a compact and beautiful structure, and the batteries hidden inside the battery box 3 also ensure the safety of the batteries and improve the safety of battery use.

[0033] The interconnected wiring cavity can be used for wiring. Wires, brake wires and other wire materials in the electric assist bicycle can pass through and be arranged in the wiring cavity. In this way, there are fewer exposed wire materials on the electric assist bicycle. On the one hand, it can reduce the aging of the wire materials, and on the other hand, it is more beautiful.

[0034] As Figures 3-5 As shown, the reinforcing plate 4 is disposed inside the lower tube body 1 of the frame and the driving mechanism card holder 2. On the one hand, it can enhance the mechanical strength of the lower tube body 1 of the frame and the driving mechanism card holder 2, making them solid, durable and safe. On the other hand, it is used to separate the battery cavity and the wiring cavity, making the battery cavity and the wiring cavity into independent spaces from each other, so that the battery installation and wire routing will not interfere with each other. When assembling the electric assist bicycle, the wire routing is more convenient, the distribution of the battery and the wire materials can be made more neat, and it is also convenient for later maintenance and repair to a certain extent.

[0035] Specifically, a power supply hole 101 penetrating the side wall of the lower tube body 1 of the frame is opened on the inner wall of one end of the lower tube body 1 of the frame away from the driving mechanism card holder 2; it can be used for the battery inside the battery box 3 to be powered later.

[0036] Specifically, one end of the lower tube body 1 of the frame is fixedly provided with a head tube connection end 11 connected to the external frame head tube; one end of the driving mechanism card holder 2 is fixedly provided with a rear fork connection end 21 connected to the external frame rear fork; in this way, during assembly, the head tube connection end 11 of the lower tube body 1 of the frame is welded to the frame head tube, and the rear fork connection end 21 of the driving mechanism card holder 2 is welded to the frame rear fork, and the integrally connected lower tube body 1 of the frame and the driving mechanism card holder 2 are installed between the frame head tube and the rear fork.

[0037] In an alternative embodiment, the drive mechanism includes a drive motor or a drive actuator.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0039] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A down tube of a lithium battery assisted bicycle, characterized in that, It includes a frame down tube body (1) and a drive mechanism card seat (2). The frame down tube body (1) and the drive mechanism card seat (2) are integrally formed. A battery box (3) is fixedly arranged inside the frame down tube body (1) and the drive mechanism card seat (2), and a reinforcing plate (4) is fixedly arranged inside the battery box (3). Among them, the drive mechanism card seat (2) includes an arc-shaped card seat (22) that matches an external drive mechanism. The battery box (3) includes a first battery installation box (31) arranged inside the frame down tube body (1) and a second battery installation box (32) arranged inside the arc-shaped card seat (22). The interiors of the first battery installation box (31) and the second battery installation box (32) both have battery cavities for installing batteries and are interconnected.

2. The under-tube of a lithium battery assisted bicycle frame according to claim 1, characterized in that: The shape and structure of the first battery installation box (31) match the shape and structure of the frame down tube body (1) and are arranged to fit the inner wall of the frame down tube body (1).

3. The under-tube of the frame of a lithium battery assisted bicycle according to claim 1, characterized in that: The shape and structure of the second battery installation box (32) match the shape and structure of the drive mechanism card seat (2) and are arranged to fit the inside of the drive mechanism card seat (2).

4. A down tube of a lithium battery assisted bicycle according to claim 1, characterized in that: There is a wire routing cavity that is interconnected inside the frame down tube body (1) and the drive mechanism card seat (2).

5. The under-tube of a lithium battery assisted bicycle frame according to claim 1, characterized in that: A power supply hole (101) is opened on the side wall of one end of the frame down tube body (1) away from the drive mechanism card seat (2), and a lock hole (102) is opened on the side wall of one end of the drive mechanism card seat (2) away from the power supply hole (101).

6. The under-tube of a lithium battery assisted bicycle frame according to claim 1, characterized in that: A head tube connection end (11) connected to an external frame head tube is fixedly arranged at one end of the frame down tube body (1) away from the drive mechanism card seat (2).

7. A down tube of a lithium battery assisted bicycle according to claim 1, characterized in that: A rear fork connection end (21) connected to an external frame rear fork is fixedly arranged at one end of the drive mechanism card seat (2) away from the frame down tube body (1).

8. The under-tube of the frame of a lithium battery assisted bicycle according to claim 1, characterized in that: The drive mechanism includes a drive motor or a drive motor.

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