Bicycle hub assembly, bicycle wheel and electric power-assisted bicycle

Abstract

The utility model provides a bicycle hub assembly, a bicycle wheel and an electric power-assisted bicycle. The bicycle hub assembly comprises an axle, a shell arranged on the axle, a control panel and a motor assembly, wherein the control panel and the motor assembly are arranged in the shell; the control panel and a stator of the motor assembly are fixedly connected with the shell, the bicycle hub assembly further comprises a sliding ring arranged in the shell, and the sliding ring is arranged on the axle in a sleeving mode and is close to the control panel. The sliding ring comprises a fixed part and a rotating part, the control panel is electrically connected with the stator and the rotating part, the fixed part is provided with a power line leading-out end, and the power line leading-out end is used for being connected with a power line outside the shell. The bicycle hub assembly, the bicycle wheel and the electric power-assisted bicycle have the advantages of being simple in structure, high in mechanism stability and the like.

Description

Technical Field

[0001] The present application relates to the technical field of electric-assisted bicycles, and in particular to a bicycle hub assembly, a bicycle wheel and an electric-assisted bicycle. Background Art

[0002] An electric-assisted bicycle is a new type of two-wheeled vehicle, a type 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 tool that can integrate human riding and motor assistance.

[0003] In the field of electric-assisted bicycles, there are two main types of motor installation positions. One is mid-mounted, that is, the motor is installed in the middle of the vehicle body, which is called a mid-mounted motor. The mid-mounted motor is connected to the frame and connected to the rear wheel through a chain to transmit power. At the same time, pedals are installed on both sides of the motor. When the motor has no power supply, the rider can use the pedals to achieve human riding, and the resistance is no different from that of a normal bicycle. The other is installed in the wheel hub of the bicycle, integrating the motor inside the hub. After power is turned on, the motor converts electrical energy into mechanical energy, thereby driving the wheel to rotate and drive the vehicle forward. The hub motor is usually installed on the front or rear wheel.

[0004] In the process of realizing the present application, the inventors found that when the prior art adopts the solution of installing the motor in the wheel hub, some designs will integrate the battery inside the wheel hub. This structure usually causes the overall volume of the wheel hub to be too large and heavy, which causes one of the wheels of the bicycle to be heavy and the center of gravity to be unstable. At the same time, the battery is set inside the wheel hub, which will limit the volume of the battery by the space of the wheel hub, making it inconvenient to increase the battery capacity. In addition, the battery and the motor will generate heat when working, and the two components will affect each other, and even cause damage or failure of one component. There are also designs that place the controller, torque sensor, etc. outside the wheel hub, resulting in a lot of wiring, difficult and cumbersome structural layout, and relatively large losses. Summary of the invention

[0005] Based on this, the present application provides a bicycle hub assembly, a bicycle wheel and an electric-assisted bicycle to solve the problem of mutual constraints between the hub shell, the motor assembly and the battery assembly in the prior art.

[0006] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a bicycle hub assembly, comprising an axle, a shell disposed on the axle and rotatably connected to the axle, and a control board and a motor assembly disposed in the shell; characterized in that the control board and the stator of the motor assembly are respectively fixedly connected to the shell, and the bicycle hub assembly also includes a slip ring disposed in the shell, the slip ring is sleeved on the axle and arranged close to the control board; the slip ring includes a fixed part and a rotating part, the control board is respectively electrically connected to the stator and the rotating part, the fixed part is provided with a power cord lead-out end, and the power cord lead-out end is used to connect to a power cord outside the shell.

[0008] In one of the embodiments, the axle is provided with a first hole in the axial direction and a second hole in the radial direction; the first hole extends inward from the first end of the axle to a position corresponding to the slip ring, and the second hole is arranged close to the slip ring and extends inward from the outer wall of the axle to communicate with the first hole; the power cord can enter the interior of the shell through the first hole and the second hole in turn and then be connected to the power cord lead-out end.

[0009] In one embodiment, the control panel is further provided with a communication module, and the connection method of the communication module includes wired connection or wireless connection; when connected by wired method, the communication line of the communication module is connected to the rotating part, and the fixed part is provided with a communication line lead-out end, and the communication line lead-out end is used to connect with the communication line of the electronic device outside the shell, and the communication line can enter the interior of the shell through the first hole body and the second hole body in sequence and then be connected to the communication line lead-out end.

[0010] In one embodiment, the bicycle hub assembly also includes a flywheel and a torque sensor arranged on the wheel axle; the flywheel and the torque sensor are respectively arranged outside the shell and arranged close to the first end of the wheel axle, the torque sensor is respectively connected to the flywheel and the shell, and the torque sensor is used to send the torque information transmitted by the flywheel to the control board, and the control board is used to control the speed of the motor according to the torque information.

[0011] In one embodiment, the motor assembly further includes a rotor and a reducer; the rotor is passed through the wheel axle and is rotationally connected to the wheel axle; the reducer is sleeved on the wheel axle and is respectively connected to the housing and the rotor.

[0012] In one embodiment, the bicycle hub assembly further comprises a magnetic ring, which is sleeved on the wheel axle and located between the rotor and the control board. The magnetic ring is used to detect the speed of the bicycle and transmit the detected speed information to the control board.

[0013] In one embodiment, the shell includes a cylinder, a first end cover and a second end cover; the cylinder is sleeved outside the stator, and the first end cover and the second end cover are respectively arranged at two ends of the cylinder to close the two end openings of the cylinder; the torque sensor is connected to the first end cover, and the output end of the reducer is connected to the second end cover.

[0014] In a second aspect, an embodiment of the present application provides a bicycle wheel, comprising the bicycle hub assembly as described above, and further comprising a tire and a plurality of spokes, wherein two ends of the spokes are respectively connected to the bicycle hub assembly and the tire.

[0015] In a third aspect, an embodiment of the present application provides an electric-assisted bicycle, comprising a frame, and a front wheel and a rear wheel respectively disposed on the frame, wherein the rear wheel is the bicycle wheel described above.

[0016] In one embodiment, the electric-assisted bicycle further includes a battery, which is fixed on the frame and connected to the control board via the power cord.

[0017] The present application has at least the following beneficial effects: the bicycle hub assembly provided in the embodiment of the present application does not have a battery assembly arranged in its shell, but by adding a slip ring on the wheel axle, the circuit on the control board is led out of the shell through the slip ring and connected to the external power line, so that the overall structure of the bicycle hub assembly is more concise. The bicycle hub assembly of the embodiment of the present application has a simple structure. Since the battery assembly is not arranged inside, the overall structure of the hub is more compact and lighter, which is conducive to keeping the overall center of gravity of the bicycle stable. At the same time, the battery is not arranged inside the shell, which reduces the heat generated inside the hub, is conducive to the normal operation of the motor assembly, and avoids mutual influence between the battery assembly and the motor assembly. The bicycle wheel and the electric power-assisted bicycle of the embodiment of the present application include the above-mentioned bicycle hub assembly, and therefore also have the above-mentioned beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a bicycle hub assembly according to an embodiment of the present application.

[0019] Figure 2 for Figure 1 A schematic cross-sectional view of a bicycle hub assembly.

[0020] Figure 3 for Figure 1 Schematic diagram of the exploded structure of a bicycle hub assembly.

[0021] The meanings of the symbols in the accompanying drawings are as follows:

[0022] 1. axle; 11. first end; 12. second end; 13. first hole body; 14. second hole body;

[0023] 2. Shell; 21. First end cover; 22. Second end cover; 23. Cylinder;

[0024] 3. Flywheel; 4. Torque sensor; 5. Slip ring; 6. Control board; 7. Magnetic ring;

[0025] 8. Motor assembly; 81. Stator; 82. Rotor; 83. Reducer; 831. Outer ring gear; 832. Planetary gear; 833. Sun gear. DETAILED DESCRIPTION

[0026] The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0028] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] The electric-assisted bicycle of the embodiment of the present application includes a frame (not shown), a front wheel (not shown) and a rear wheel (not shown) rotatably connected to the frame respectively, and a handlebar head (not shown) arranged on the frame above the front wheel, and also includes a battery (not shown). The battery serves as a power source for the electric-assisted bicycle to provide electrical energy. The battery can be a rechargeable battery, such as a lithium battery.

[0031] The front wheel includes a tire (not shown), spokes (not shown) and a hub (not shown), wherein a plurality of spokes are evenly arranged between the tire and the hub, and both ends of each spoke are detachably connected to the hub and the tire to form a complete bicycle wheel.

[0032] like Figure 1 As shown, the rear wheel includes a tire (not shown), spokes (not shown) and a bicycle hub assembly. Figure 2 and Figure 3 As shown, the bicycle hub assembly of the rear wheel includes an axle 1, a housing 2 disposed on the axle 1 and rotatably connected to the axle 1, and a control board 6 and a motor assembly 8 disposed in the housing 2. It also includes a slip ring 5 disposed on the axle 1, and the slip ring 5 is disposed close to the control board 6.

[0033] The axle 1 is provided with a first hole 13 in the axial direction and a second hole 14 in the radial direction. The axle 1 includes a first end 11 and a second end 12 opposite to each other. The first hole 13 extends inwardly from the first end 11 of the axle 1 to a position corresponding to the slip ring 5. The second hole 14 is arranged close to the slip ring 5 and extends inwardly from the outer wall of the axle 1 to communicate with the first hole 13.

[0034] Specifically, see Figure 2 and Figure 3 In this embodiment, the shell 2 includes a cylinder 23, a first end cover 21 and a second end cover 22. The cylinder 23 is specifically a cylinder, which is rotatably connected to the axle 1. The first end cover 21 and the second end cover 22 are respectively arranged at both ends of the cylinder 23, and are used to close the openings at both ends of the cylinder 23. The first end cover 21 is arranged close to the first end 11 of the axle 1, and the second end cover 22 is arranged close to the second end 12 of the axle 1. The two end covers (the first end cover 21 and the second end cover 22) can be detachably connected to the cylinder 23 respectively, or one of the end covers can be detachably connected to the cylinder 23, and the other end cover can be integrally formed or fixedly connected to the cylinder 23. In this embodiment, both end covers are detachably connected to the cylinder 23, and the detachable end covers can facilitate the installation and maintenance of internal components.

[0035] The motor assembly 8 includes a rotor 82, a stator 81 and a reducer 83. The rotor 82 is inserted into the axle 1 and is rotatably connected to the axle 1. The stator 81 is sleeved outside the rotor 82 and is fixedly connected to the housing 2. The reducer 83 is sleeved on the axle 1 and is connected to the housing 2 and the rotor 82 respectively.

[0036] The control board 6 is provided with a controller (not shown), which can be used for controlling the entire bicycle, and can include multiple functional modules, such as a motor speed control module and a battery management module. The control board 6 is fixedly connected to the housing and is arranged near the first end cover 21. A slip ring 5 is provided between the first end cover 21 and the control board 6, and the slip ring 5 includes a fixed part (not shown) and a rotating part (not shown). The fixed part is inserted and fixed on the wheel axle 1, and the rotating part rotates together with the control board 6. In order to realize the functional diversification and convenient use of the electric power-assisted bicycle, a communication module (not shown) can also be installed. The communication module can be a wireless communication module such as a WIFI module or a Bluetooth module, or it can also be a wired communication module. The wired module is arranged on the control board 6, and the communication line of the communication module is connected to the rotating part. The fixed part is provided with a communication line lead-out terminal (not shown), and the communication line lead-out terminal is used to connect with the communication line of the electronic device outside the housing 2. The control board 6 is electrically connected to the stator 81 and the rotating part respectively, and the fixed part is also provided with a power line lead-out terminal (not shown), and the power line lead-out terminal is used to connect with the power line of the battery outside the housing 2. The external power line can enter the housing 2 through the first hole 13 and the second hole 14 in sequence and then be connected to the power line lead-out terminal. The external communication line can also enter the housing 2 through the first hole 13 and the second hole 14 in sequence and then be connected to the communication line lead-out terminal.

[0037] The axle 1 is configured as a hollow structure with a hole body to facilitate the lead-out of the circuit inside the housing 2. The power line includes two power positive and power negative lines, which are connected to the battery respectively. The communication line can be one to realize single-line communication, or two to realize data transmission and reception functions at the same time.

[0038] The battery can be installed at the front diagonal bar of the frame and connected to the control board 6 through a power cord. The battery is arranged outside the housing 2 to avoid the limitation of the battery volume due to the space limitation of the housing 2, which is conducive to enhancing the battery's endurance. At the same time, the battery is arranged on the frame to avoid the excessive weight of the bicycle hub assembly and affect the overall center of gravity of the bicycle. For example, when the user uses it, the front may be light and the back may be heavy, which may cause the front wheel to leave the ground if not paid attention. The motor assembly 8 and the battery will both generate heat during operation. If both are arranged in the housing 2, it is very easy for the two to affect each other, which reduces the working stability of the motor assembly 8 and the battery. Designing the battery outside the housing 2 can avoid the occurrence of the above problems.

[0039] On the axle 1 inside the housing 2, from the first end 11 to the second end 12, a slip ring 5, a control plate 6, a magnetic ring 7, a rotor 82 and a reducer 83 are sequentially sleeved.

[0040] The rotor 82 is rotatably connected to the wheel shaft 1. The stator 81 is sleeved on the outer periphery of the rotor 82. The stator 81 is fixedly connected to the control board 6 and the housing 2, thereby realizing synchronous movement with the housing 2. The stator 81 coil is electrically connected to the control board 6. The magnetic ring 7 is used to detect the speed of the bicycle and transmit the detected speed information to the control board 6. Figure 3 As shown, the reducer 83 in this embodiment is a planetary gear reducer 83, including an outer ring gear 831, planetary gears 832 and a sun gear 833. The sun gear 833 and the rotor 82 are fixedly connected, and the outer ring gear 831 and the second end cover 22 are fixedly connected, thereby driving the housing 2 to rotate around the wheel shaft 1.

[0041] The bicycle hub assembly of this embodiment further includes a flywheel 3 and a torque sensor 4 arranged on the wheel axle 1. The flywheel 3 and the torque sensor 4 are respectively arranged outside the housing 2, and the flywheel 3 is arranged closer to the first end 11 of the wheel axle 1 relative to the torque sensor 4. The torque sensor 4 is respectively connected to the flywheel 3 and the first end cover 21. When a person steps on the pedal, the flywheel 3 is driven to rotate through the chain, and the flywheel 3 drives the housing 2 to rotate synchronously through the torque sensor 4. The torque sensor 4 is also used to send the torque information transmitted by the flywheel 3 to the control board 6, and the control board 6 is used to control the speed of the motor according to the torque information. The control board 6 controls the speed of the rotor 82 according to the received torque information. For example, when the speed of the person pedals faster, the value of the torque information transmitted is larger, and the speed of the rotor 82 controlled by the control board 6 is larger. For example, the speed transmitted by the flywheel 3 to the housing 2 and the speed output by the rotor 82 to the housing 2 via the reducer 83 can be controlled according to a ratio of 1:1, 1:1.1 or 1:1.2. That is, the faster the person pedals, the larger the auxiliary power output by the motor assembly 8 is. The torque sensor 4 not only serves the purpose of detecting the torque information of the flywheel 3, but also serves the function of connecting the flywheel 3 and the housing 2. A handlebar control can also be set on the handlebar head of the bicycle. The handlebar control is electrically connected to the control board 6 through the torque sensor 4. The larger the angle of rotation of the handlebar control, the larger the value of the torque information transmitted to the torque sensor 4, and the larger the speed of the rotor 82 output controlled by the control board 6 is.

[0042] The electric-assisted bicycle of the embodiment of the present application can be set with three power modes, pure human power, combination of human power and electricity, and pure electricity. The pure human power mode is that the human pedals, the pedals drive the flywheel through the chain, and the flywheel drives the wheel to rotate, providing the electric-assisted bicycle with forward power. At this time, the motor assembly does not work. The human power and electricity combination mode is that when the human pedals, the motor assembly provides auxiliary power, making the person riding easier and more labor-saving. The pure electric mode is that the person does not need to pedal, and only controls the output speed of the motor assembly through the handlebar control, and the power is completely provided by the motor assembly.

[0043] The bicycle hub assembly, bicycle wheel and electric-assisted bicycle of the embodiment of the present application have a simple overall structure and diversified functions. Since the battery and the bicycle hub assembly are separately arranged, the overall structure of the bicycle hub assembly is more compact, smaller in size, lighter in weight, and the user's experience is better. At the same time, the battery and the motor assembly will not affect each other during operation, the stability of the system is stronger, and the volume and capacity of the battery will not be restricted by the housing space, which is conducive to improving the endurance of the electric-assisted bicycle.

[0044] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0045] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A bicycle hub assembly, comprising a wheel axle, a housing disposed on the wheel axle and rotatably connected to the wheel axle, and a control panel and a motor assembly disposed in the housing; characterized in that: The control board and the stator of the motor assembly are respectively fixedly connected to the shell, and the bicycle hub assembly also includes a slip ring arranged in the shell, the slip ring is sleeved on the wheel axle and arranged close to the control board; the slip ring includes a fixed part and a rotating part, the control board is respectively electrically connected to the stator and the rotating part, the fixed part is provided with a power cord lead-out end, and the power cord lead-out end is used to connect with the power cord outside the shell.

2. The bicycle hub assembly according to claim 1, wherein: The axle is provided with a first hole body in the axial direction and a second hole body in the radial direction; the first hole body extends inwardly from the first end of the axle to a position corresponding to the slip ring, and the second hole body is arranged close to the slip ring and extends inwardly from the outer wall of the axle to communicate with the first hole body; the power cord can enter the interior of the shell through the first hole body and the second hole body in sequence and then be connected to the power cord lead-out end.

3. The bicycle hub assembly according to claim 2, wherein: A communication module is also provided on the control panel, and the connection method of the communication module includes wired connection or wireless connection; when connected by wired method, the communication line of the communication module is connected to the rotating part, and a communication line lead-out terminal is provided on the fixed part, and the communication line lead-out terminal is used to connect with the communication line of the electronic device outside the shell, and the communication line can enter the inside of the shell through the first hole body and the second hole body in sequence and then be connected to the communication line lead-out terminal.

4. The bicycle hub assembly according to claim 1, wherein: It also includes a flywheel and a torque sensor arranged on the axle; the flywheel and the torque sensor are respectively arranged outside the shell and arranged close to the first end of the axle, the torque sensor is respectively connected to the flywheel and the shell, and the torque sensor is used to send the torque information transmitted by the flywheel to the control board, and the control board is used to control the speed of the motor according to the torque information.

5. The bicycle hub assembly according to claim 4, wherein: The motor assembly also includes a rotor and a reducer; the rotor is inserted into the wheel axle and is rotatably connected to the wheel axle; the reducer is sleeved on the wheel axle and is respectively connected to the housing and the rotor.

6. The bicycle hub assembly according to claim 5, wherein: It also includes a magnetic ring, which is sleeved on the wheel shaft and located between the rotor and the control board. The magnetic ring is used to detect the speed of the bicycle and transmit the detected speed information to the control board.

7. The bicycle hub assembly according to claim 5, wherein: The shell includes a cylinder, a first end cover and a second end cover; the cylinder is sleeved outside the stator, and the first end cover and the second end cover are respectively arranged at two ends of the cylinder to close the two end openings of the cylinder; the torque sensor is connected to the first end cover, and the output end of the reducer is connected to the second end cover.

8. A bicycle wheel, characterized in that: The bicycle hub assembly comprises the bicycle hub assembly as claimed in any one of claims 1 to 7, and further comprises a tire and a plurality of spokes, wherein two ends of the spokes are respectively connected to the bicycle hub assembly and the tire.

9. An electric power-assisted bicycle, characterized in that: The bicycle comprises a frame, a front wheel and a rear wheel respectively arranged on the frame, wherein the rear wheel is the bicycle wheel according to claim 8.

10. The electric-assisted bicycle according to claim 9, characterized in that: It also includes a battery, which is fixed on the frame and connected to the control board through the power line.

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