Foldable electric bicycle
By separating the battery and controller in an electric bicycle, the problems of insufficient space and unbalanced weight are solved, resulting in greater capacity, better heat dissipation and stability, and improved range and ease of use of the electric bicycle.
Patent Information
- Application Number
- CN202520691534.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-04-11
AI Technical Summary
Existing electric bicycles suffer from insufficient space, heat accumulation, and weight imbalance due to the battery and controller being hidden inside the main beam tube, which affects range and operational stability.
The battery and controller are designed separately. The battery is housed in a cavity inside the main beam tube, while the controller is hidden inside the riser tube. This separate design avoids mutual heat interference and optimizes weight distribution.
The design capacity and heat dissipation of the battery have been improved to ensure stable operation of the controller and balanced weight distribution, making it convenient for users to fold and carry the electric bicycle.
Smart Images
Figure CN223702836U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bicycle technical field especially a kind of foldable electric bicycle. BACKGROUND
[0002] Electric bicycle is driven by the motor hidden in rear wheel hub, and the motor is powered by battery. The existing electric bicycle hides battery in front end of main beam tube of frame, and the controller for controlling motor is hidden in rear end of main beam tube of frame. In order to prevent water, the battery is usually designed to be closed and hidden. This brings the following problems:
[0003] First, the space inside main beam tube is very limited, and the controller occupies part of the space of main beam tube, so that the space for hiding battery in main beam tube is small, which affects the design of endurance of electric bicycle.
[0004] Second, the heat generated by battery and controller is gathered and affects each other, which not only makes battery easy to age, but also makes controller work unstable.
[0005] Third, the battery is concentrated in front end of main beam tube, and the weight is unbalanced after folding the vehicle, which is not conducive to the folding electric bicycle. INVENTION CONTENTS
[0006] The utility model aims at at least solving one of the technical problems existing in prior art, and provides a foldable electric bicycle, which has the advantages of good battery heat dissipation performance, balanced weight after folding and convenient user carrying.
[0007] The utility model provides a foldable electric bicycle, which comprises a frame, a front wheel assembly rotatably folded to one side of the frame and a rear wheel assembly rotatably folded to the other side of the frame, the frame comprises a main beam tube, a stand tube and a head tube fixed below and at the front end of the main beam tube respectively, the front wheel assembly comprises a front hub and a front fork fixedly connected, the rear wheel assembly comprises a rear hub and a rear fork fixedly connected, and a drive motor is hidden in the rear hub; the main beam tube is provided with a containing cavity and a cover for closing the containing cavity, and a battery is arranged in the containing cavity; a controller for controlling the drive motor is hidden in the stand tube, and the controller is arranged away from the battery.
[0008] In some preferred embodiments, the containing cavity extends from the front end of the main beam tube to the rear end of the main beam tube, and the battery is arranged in the containing cavity.
[0009] In some preferred embodiments, the transverse length of the containing cavity is at least 80% of the transverse length of the main beam tube.
[0010] In some preferred embodiments, a battery holder for fixing the battery is arranged in the accommodating cavity.
[0011] In some preferred embodiments, the vertical pipe comprises a front vertical pipe fixed below the middle part of the main beam pipe and a middle vertical pipe fixed below the rear end of the main beam pipe, the main beam pipe, the front vertical pipe and the middle vertical pipe form a triangular support structure, and the controller is hidden in the front vertical pipe.
[0012] In some preferred embodiments, the front fork is rotatably connected with the head tube through a first rotating shaft, so that the front wheel assembly is rotatable to one side below the main beam pipe around the first rotating shaft.
[0013] In some preferred embodiments, the rear fork is rotatably connected with the vertical pipe through a second rotating shaft, so that the rear wheel assembly is rotatable to the other side below the main beam pipe around the second rotating shaft.
[0014] Compared with the prior art, the utility model has the advantages of the following:
[0015] The utility model discloses a folding bicycle, adopts the separation design to the battery and the controller, and the battery has greater design capacity space in the main beam pipe, the appearance of the battery is made fine and beautiful under the premise of guaranteeing the battery capacity, and the battery also has greater heat dissipation space, the controller also has sufficient heat dissipation space in the vertical pipe, the heat generated by various work of the battery and the controller does not influence each other, the heat dissipation effect is good, the service life of the battery is improved, and the stable work of the controller is ensured, and simultaneously, the weight distribution of the battery in the main beam pipe is balanced, so that the gravity center of the battery in the main beam pipe is basically distributed in the middle part of the main beam pipe, the gravity center is stable when the user holds the middle part of the main beam pipe and carries in the folding state of the electric bicycle, and the user is not inclined to the front or the back, so that the user is convenient to use. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the perspective view of the utility model foldable electric bicycle in the use state.
[0017] Figure 2 It is the perspective view of the utility model foldable electric bicycle in the folding state.
[0018] Figure 3 It is Figure 2 partial explosion drawing.
[0019] Figure 4 It is the explosion drawing of another embodiment of the frame of the foldable electric bicycle.
[0020] The meanings of the reference numerals of the components in the drawings are as follows: 1, frame; 11, main beam tube; 111, accommodating cavity; 112, cover; 113, battery support; 12, head tube; 13, front vertical tube; 14, middle vertical tube; 2, front wheel assembly; 21, front wheel hub; 22, front fork; 3, rear wheel assembly; 31, rear wheel hub; 32, rear horizontal fork; 33, five-way middle shaft; 4, handlebar assembly; 6, first rotating shaft; 7, second rotating shaft; 91, storage battery; 92, controller. DETAILED DESCRIPTION
[0021] To further clarify the technical means and effects taken by the present application to achieve the predetermined purpose, the specific embodiments, structures, features and effects thereof according to the present application are described in detail below in combination with the drawings and preferred embodiments. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.
[0022] In combination Figure 1 And Figure 2 As shown in the drawings, the utility model discloses a kind of foldable electric bicycle, including frame 1, rotatable folding to the front wheel assembly 2 of one side of frame 1 and rotatable folding to the rear wheel assembly 3 of the other side of frame 1. As shown in Figure 1 As shown in the drawings, in use state, front wheel assembly 2 is fixed at the front end of frame 1, and rear wheel assembly 3 is fixed at the rear end of frame 1. As shown in the drawings, Figure 2 As shown in the drawings, in folding state, front wheel assembly 2 is folded to one side of frame 1 by rotating backwards, and rear wheel assembly 3 is folded to the other side of frame 1 by rotating forwards, so that the overall size of folded electric bicycle is smaller, to facilitate storage, or folding after riding to destination.
[0023] Frame 1 specifically includes main beam tube 11, vertical tube and head tube 12 fixed below and at the front end of main beam tube 11. Preferably, vertical tube includes front vertical tube 13 fixed below the middle of main beam tube 1 and middle vertical tube 14 fixed below the rear end of main beam tube 11, and main beam tube 11, front vertical tube 13 and middle vertical tube 14 constitute a triangular support structure, so that the overall structure of frame 1 is stable, with better load-bearing performance.
[0024] Front wheel assembly 2 includes fixedly connected front wheel hub 21 and front fork 22, and front wheel hub 21 is fixed at the lower end of front fork 22, and the upper end of front fork 22 is rotatably connected with the lower end of front vertical tube 13. For example, the upper end of front fork 22 is rotatably connected with head tube 12 through first rotating shaft 61, so that front wheel assembly 2 can be rotated to one side below main beam tube 11 around first rotating shaft 61.
[0025] It can be understood that any prior art first locking assembly can be installed between the head tube 12 and the front fork 22 to control the front wheel assembly 2 relative to the frame 1 to be in an unfolded use state or in a foldable rotating state. The first locking assembly adopts the prior art, and its specific structure is not described here.
[0026] The rear wheel assembly 3 includes a fixedly connected rear hub 31 and a rear fork 32, the rear end of the rear fork 32 is fixedly connected with the rear hub 31, and a driving motor is hiddenly arranged in the rear hub 31 to provide driving force when the electric bicycle is ridden. The rear wheel assembly 3 further includes a five-way axle 33 for installing a gear disc, and the front end of the rear fork 32 is fixedly connected with the five-way axle 33.
[0027] A second rotating shaft 62 is arranged at the lower end of the vertical tube, and the rear fork 32 is rotatably connected with the vertical tube through the second rotating shaft 62, so that the rear wheel assembly 3 can be rotated to the other side below the main beam tube 11.
[0028] Of course, the electric bicycle also includes a handlebar assembly 4 installed on the head tube 12, which is also folded to one side of the frame 1 to reduce the overall size in the folded state as shown in Figure 2
[0029] Further in combination with Figure 3 and Figure 4 It is shown that the main beam tube 11 is provided with a receiving cavity 111 and a cover 112 for closing the receiving cavity 111, and the receiving cavity 111 is provided with a battery 91; and a controller 92 for controlling the driving motor is hiddenly arranged in the vertical tube, and the controller 92 is arranged away from the battery 91.
[0030] By arranging the controller 92 away from the battery 91 and hiddenly arranging it in the vertical tube instead of arranging it in the receiving cavity 111, at least the following beneficial technical effects can be obtained:
[0031] 1. The controller 92 does not need to occupy the space of the receiving cavity 111 in the main beam tube 11, and the receiving cavity 111 is only used for installing the battery 91, so that the battery 91 can be designed with maximum capacity according to the specifications of the receiving cavity 111, which is beneficial to improve the endurance design of the electric bicycle.
[0032] 2. Since the battery 91 and the controller 92 are designed separately, the battery 91 has a large heat dissipation space in the main beam tube, and the controller 92 also has sufficient heat dissipation space in the vertical tube, the heat generated by various operations of the battery 91 and the controller 92 will not affect each other, the heat dissipation effect is good, which is beneficial to improve the service life of the battery 91 and ensure the stable operation of the controller 92.
[0033] 3、Only the battery 91 is in the accommodating cavity 111 of the main beam tube 11, the battery 91 does not need to be centrally arranged at the front end or the rear end of the accommodating cavity 111, so that the weight of the battery 91 in the main beam tube 11 is evenly distributed, and after the electric bicycle is in the folding state shown in the figure, the user often holds the middle part of the main beam tube 11 with one hand to carry the electric bicycle to the destination, and the overall mass distribution is balanced during the carrying process, and the electric bicycle in the folding state will not overturn when carrying due to the uneven weight caused by the battery 91 arranged at the front end or the rear end of the accommodating cavity 111 to avoid the controller 92, thereby facilitating the user to use. Figure 2
[0034] In order to fully utilize the large space of the accommodating cavity 111 of the main beam tube 11, so as to design a larger accommodating battery 91, the accommodating cavity 111 is usually extended from the front end of the main beam tube 11 to the rear end of the main beam tube. And the transverse length of the accommodating cavity 111 is at least 80% of the transverse length of the main beam tube 11. The transverse direction refers to the length direction of the main beam tube 11 between the front wheel assembly 2 and the rear wheel assembly 3.
[0035] In addition, the battery 91 is preferably centrally arranged in the accommodating cavity 11. This is to make the weight of the battery 91 in the frame 1 balanced, especially to make the center of gravity of the battery 91 in the folding state basically located in the middle part of the main beam tube 11, so that the user holds the middle part of the main beam tube 11 to carry the electric bicycle more stably, and the electric bicycle will not overturn forward or backward.
[0036] The battery 91 can be an integral structure, as shown in the figure. It can also include a combination state of multiple batteries 91, and for this purpose, a battery support 113 for fixing the battery is arranged in the accommodating cavity 111, and two adjacent battery supports 113 are used to fix a battery 91, as shown in the figure. Figure 3 Figure 4
[0037] In addition, the controller 92 is preferably hidden in the front vertical tube 13, not only because the front vertical tube 13 has a larger space to provide better heat dissipation performance, but also to facilitate the wiring of the wires connecting the controller 92 and the drive motor.
[0038] The above only describes the preferred embodiments of the present application and does not limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A foldable electric bicycle, comprising a frame, a front wheel assembly rotatably foldable to one side of the frame, and a rear wheel assembly rotatably foldable to the other side of the frame, the frame comprising a main beam tube, a stand tube and a head tube fixed respectively below and at the front end of the main beam tube, the front wheel assembly comprising a front hub and a front fork fixedly connected, and the rear wheel assembly comprising a rear hub and a rear horizontal fork fixedly connected, a driving motor being arranged in the rear hub in a hidden manner; characterized in that: The main beam pipe is provided with a containing cavity and a cover for closing the containing cavity, and a storage battery is arranged in the containing cavity; a controller for controlling the driving motor is arranged in the vertical pipe and is away from the storage battery.
2. The foldable electric bicycle of claim 1, wherein: The containing cavity extends from the front end of the main beam pipe to the rear end of the main beam pipe, and the storage battery is arranged in the containing cavity centrally.
3. The foldable electric bicycle of claim 2, wherein: The transverse length of the containing cavity is at least 80% of the transverse length of the main beam pipe.
4. The foldable electric bicycle of claim 1, wherein: A battery support for fixing the storage battery is arranged in the containing cavity.
5. The foldable electric bicycle of claim 1, wherein: The vertical pipe comprises a front vertical pipe fixed below the middle part of the main beam pipe and a middle vertical pipe fixed below the rear end of the main beam pipe, and the main beam pipe, the front vertical pipe and the middle vertical pipe form a triangular support structure; the controller is arranged in the front vertical pipe.
6. The foldable electric bicycle according to any one of claims 1-5, characterized in that: The front fork is rotatably connected with the lower end of the head tube through a first rotating shaft, so that the front wheel assembly is rotatable to one side below the main beam pipe about the first rotating shaft.
7. The foldable electric bicycle of claim 6, wherein: The rear flat fork is rotatably connected with the lower end of the vertical pipe through a second rotating shaft, so that the rear wheel assembly is rotatable to the other side below the main beam pipe about the second rotating shaft.