Unidirectional transmission motor and electric vehicle comprising same

Abstract

The utility model discloses a one-way transmission motor, which is used for outputting torque to a driving wheel of an electric vehicle, and comprises a motor shell; the stator is fixedly arranged on the motor shell; the rotor is rotationally mounted on the motor shell; the conductive coil is arranged on the stator and surrounds the periphery of the rotor; the magnetic field generator is arranged on the rotor and used for generating a magnetic field capable of penetrating through a conductive coil and synchronously rotates along with the rotor; the rotor comprises a rotating shaft, a rotating body and a one-way transmission structure arranged at the power output end of the rotating shaft, the motor outputs forward torque to the driving wheel through the one-way transmission structure, and the driving wheel does not output torque to the rotating body; a protective cover is arranged on the outer side of the one-way transmission structure, and the inner side surface of the protective cover protrudes to form an impeller. The motor is provided with a one-way transmission structure, so that the retardation of the motor to the advancing process of the electric vehicle is avoided, and the energy loss caused by the motor is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a one-way transmission motor and electric vehicle containing the motor belong to motor technical field. BACKGROUND

[0002] With the rapid development of society, traffic congestion exists universally in various cities, especially during the rush hour, many people delay many important things because of traffic jams. In order to alleviate the annoyance of traffic congestion, more and more people use two-wheeled electric vehicles, electric scooters, balance cars and other small and medium-sized electric vehicles as the choice of daily travel.

[0003] The rotor of the motor will rotate with the driving wheel when the existing small and medium-sized electric vehicles are free to slide forward, consuming the kinetic energy of the vehicle; when the vehicle needs to be driven forward by manpower (such as vehicle failure, battery power consumption, etc.), it will consume the user's own energy and increase the resistance of forward movement.

[0004] Chinese patent CN211281364U discloses a power transmission system of an electric power-assisted bicycle, which adopts the structure of a one-way bearing to make the movement of the movement core and the five-way shaft mutually disconnected when driven completely by manpower, thereby not driving the movement core shaft to move, and plays the role of saving labor during pure manpower. However, the power transmission system lacks a protection structure and a heat dissipation structure, and when driving in rainy days, waterlogged sections and dusty sections, the power transmission system is easy to be waterlogged or dusty, and the motor is easy to overheat during long-time driving, thereby affecting the service life of the power transmission system.

[0005] Therefore, it is necessary to develop a new type of one-way transmission motor to solve the above problems. Utility model content

[0006] The utility model aims at providing a one-way transmission motor which does not waste the kinetic energy of the electric vehicle itself and is waterproof, dustproof and good at heat dissipation, and an electric vehicle containing the motor.

[0007] To achieve the above purpose, the utility model provides the following technical scheme:

[0008] A one-way transmission motor for outputting torque to a drive wheel of an electric vehicle, comprising: a motor housing; a stator fixedly installed on the motor housing; a rotor rotatably installed on the motor housing; a conductive coil arranged on the stator and surrounding an outer periphery of the rotor; a magnetic field generator arranged on the rotor to generate a magnetic field capable of passing through the conductive coil and synchronously rotating with the rotor; the rotor comprises a rotating shaft rotatably installed on the motor housing, a rotating body arranged on the rotating shaft and synchronously rotating with the rotating shaft, and a one-way transmission structure arranged on a power output end of the rotating shaft, the motor outputs positive torque to the drive wheel through the one-way transmission structure, and the drive wheel does not output torque to the rotating body; an outer side of the one-way transmission structure is provided with a protective cover, the protective cover is installed on the rotating shaft and synchronously rotates with the rotating shaft, an inner side surface of the protective cover is protruded to form an impeller, and the protective cover is gap-fitted with the motor housing. When the electric vehicle equipped with the motor is in a state of electric power driving forward, the motor operates to drive the drive wheel of the electric vehicle to rotate; when the electric vehicle is in a state of free sliding forward or driving forward by relying on human power, only the outer ring of the one-way transmission structure rotates with the drive wheel, and the rotor of the motor as a whole remains in a stationary state, thereby avoiding the obstruction of the motor to the forward movement of the electric vehicle and reducing the energy loss caused by the motor. The gap-fitted protective cover between the motor housing can effectively prevent rainwater, splashed water and dust from entering the interior of the motor; during the operation of the motor, the protective cover synchronously rotates with the rotating shaft, the impeller on the inner surface of the protective cover generates a cooling airflow towards the inside, and the heat dissipation effect of the motor and the one-way transmission structure is ensured.

[0009] In some embodiments, the one-way transmission structure is a one-way bearing; specifically, the one-way bearing is a roller type one-way bearing or a wedge block type one-way bearing.

[0010] In some embodiments, the one-way transmission structure is a ratchet structure, which can be arranged as a single layer or multiple layers as needed; when the ratchet structure is a multiple layer, the ratchet outer ring of each layer of the ratchet structure can be in transmission connection with the drive wheel of the electric vehicle and output different torque to the drive wheel of the electric vehicle to adapt to different road conditions.

[0011] Further, the one-way transmission motor further comprises a control module, the control module comprises a speed measuring magnet, a Hall sensor matched with the speed measuring magnet, a controller and an electronic speed regulator, the controller is electrically connected with the speed measuring magnet and the Hall sensor respectively, and the electronic speed regulator is electrically connected with the controller and the conductive coil respectively. The linear speed of the driving wheel is monitored in real time through the speed measuring magnet and the Hall sensor matched with the speed measuring magnet, and the monitoring result is transmitted to the controller; when the linear speed V of the driving wheel is less than a set speed V1, the controller sends an electric signal instruction to the electronic speed regulator to increase the input power of the conductive coil to accelerate the motor; when the linear speed V of the wheel is greater than a set speed V2, the controller sends an electric signal instruction to the electronic speed regulator to reduce the input power of the conductive coil to slow down the motor, so that the uniform cruise of the electric vehicle is realized.

[0012] The utility model also provides a kind of electric vehicle, the drive device of the electric vehicle is the one-way transmission motor described above, and the electric vehicle includes but is not limited to electric scooter, electric balance car or two-wheeled electric vehicle.

[0013] The utility model has the advantages that:

[0014] The utility model is provided with one-way transmission structure at the power output end of motor rotating shaft, when the electric vehicle installed with the motor is in the state of electric power driving forward, the motor rotates to drive the rotation of the driving wheel of the electric vehicle;When the electric vehicle is in the state of free sliding forward or is driven forward by manpower, only the outer ring of one-way transmission structure in the motor rotates with the driving wheel, and the rotor of the motor remains in a static state, which avoids the retardation of the motor to the forward process of the electric vehicle and reduces the energy loss caused by the motor.

[0015] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following will be described in detail with the preferred embodiment of the utility model and the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0017] Figure 1The sectional view of the one-way transmission motor shown in embodiment 1 of the utility model;

[0018] Figure 2 The whole structure schematic diagram of the one-way transmission motor shown in embodiment 1 of the utility model;

[0019] Figure 3 The structure schematic diagram of the protective cover shown in embodiment 1 of the utility model;

[0020] Figure 4 The structure schematic diagram of the one-way bearing shown in embodiment 1 of the utility model;

[0021] Figure 5 The structure schematic diagram of the single-layer ratchet wheel structure shown in embodiment 2 of the utility model.

[0022] In the drawings, the component list represented by each sign is as follows:

[0023] 1, motor shell;2, stator;3, rotor;31, rotating shaft;32, rotating body;4, conducting coil;5, magnetic field generator;6, one-way transmission structure;61, bearing inner ring;62, bearing outer ring;63, ratchet wheel inner ring;64, ratchet wheel outer ring;7, protective cover;71, impeller. DETAILED DESCRIPTION

[0024] The specific implementation of the utility model will be described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0025] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. The device or element indicated or implied must have a particular orientation, a particular orientation and operation, so it cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it needs to be explained that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] Embodiment 1

[0028] Referring to Figures 1 to 3 The utility model provides a unidirectional transmission motor for outputting torque to the drive wheel of electric vehicle, which comprises a motor housing 1, a stator 2, a rotor 3, a conductive coil 4, a magnetic field generator 5 and a control module. The motor is a brushless motor, the stator 2 is fixedly installed on the motor housing 1, and the conductive coil 4 is arranged on the stator 2 and surrounds the rotor 3; the rotor 3 is rotatably installed on the motor housing 1, and the rotor 3 comprises a rotating shaft 31 rotatably installed on the motor housing 1, a rotating body 32 arranged on the rotating shaft 31 and synchronously rotating with the rotating shaft, and a unidirectional transmission structure 6 arranged on the power output end of the rotating shaft 31; the magnetic field generator 5 is arranged on the rotating body 32 and synchronously rotates with the rotating body 32 to generate a magnetic field capable of penetrating the conductive coil 4. The motor outputs positive torque to the drive wheel through the unidirectional transmission structure 6, and the drive wheel does not output torque to the rotating body 32. The outer side of the unidirectional transmission structure 6 is provided with a protective cover 7, the protective cover 7 is installed on the rotating shaft 31 and synchronously rotates with the rotating shaft 31, the inner side surface of the protective cover 7 is protruded to form an impeller 71, and the protective cover 7 is gap-fitted with the motor housing 1.

[0029] Referring to Figure 4 In the embodiment, the unidirectional transmission structure 6 is a wedge block type one-way bearing, the bearing inner ring 61 is fixedly sleeved on the rotating shaft 31 of the motor and synchronously rotates with the rotating shaft 31, and the bearing outer ring 62 is drivingly connected with the drive wheel of the electric vehicle. In other embodiments, the unidirectional transmission structure 6 can also be a roller type one-way bearing, and the specific type is not limited.

[0030] The control module comprises a speed measuring magnet, a Hall sensor matched with the speed measuring magnet, a controller electrically connected with the speed measuring magnet and the Hall sensor, and an electronic speed regulator electrically connected with the controller and the conductive coil 4 respectively.

[0031] The working principle of the motor is as follows:

[0032] When the electric vehicle installed with the motor is in the state of electric power driving forward, the motor rotates to drive the drive wheel of the electric vehicle to rotate; when the electric vehicle is in the state of free coasting forward or driving forward by relying on human power, only the bearing outer ring 62 of the unidirectional transmission structure 6 rotates with the drive wheel, and the rotor 3 of the motor as a whole keeps in a stationary state, thereby avoiding the retardation of the motor to the forward process of the electric vehicle and reducing the energy loss caused by the motor. The protective cover 7 gap-fitted with the motor housing can effectively prevent rainwater, splashing water, sand and dust from entering the inside of the motor; in the process of motor operation, the protective cover 7 synchronously rotates with the rotating shaft, the impeller 71 on the inner surface of the protective cover 7 generates a cooling air flow towards the inside, thereby ensuring the heat dissipation effect of the motor and the unidirectional transmission structure and prolonging the service life of the motor.

[0033] The linear speed of the drive wheel is monitored in real time by a speed-measuring magnet and a Hall sensor adapted to the speed-measuring magnet, and the monitoring results are transmitted to the controller. When the linear speed V of the drive wheel is less than the set speed V1, the controller sends an electrical signal command to the electronic speed controller to increase the input power of the conductive coil 4 to accelerate the motor. When the linear speed V of the wheel is greater than the set speed V2, the controller sends an electrical signal command to the electronic speed controller to reduce the input power of the conductive coil 4 to slow down the motor, thereby achieving constant speed cruising of the electric vehicle.

[0034] Example 2

[0035] The unidirectional drive motor provided in Embodiment 2 of this utility model is similar in construction to the unidirectional drive motor provided in Embodiment 1. In the following description, the differences between Embodiment 2 and Embodiment 1 will be the primary focus. Descriptions of elements (components or parts) that are identical or corresponding to those in Embodiment 1 in Embodiment 2 will be omitted.

[0036] Please see Figure 5 The difference between this embodiment and embodiment 1 is that in this embodiment, the one-way transmission structure 6 is a ratchet structure. The inner ring 63 of the ratchet is fixedly sleeved on the rotating shaft 31 of the motor and rotates synchronously with the rotating shaft 31. The outer ring 64 of the ratchet is connected to the drive wheel of the electric vehicle. The ratchet teeth are evenly distributed around the inner ring 63 of the ratchet, and the outer ring 64 of the ratchet is provided with pawls that correspond to the ratchet teeth. The ratchet structure can be set as a single layer or multiple layers as needed.

[0037] In this embodiment, the ratchet structure is a single layer. In other embodiments, the ratchet structure may also have multiple layers (2, 3, 4, 5, 6 layers, etc., which are not specifically limited). The multiple ratchet structures with different outer diameters are coaxially arranged, and the outer ring 64 of the ratchet in each layer can be connected to the drive wheel of the electric vehicle. Under the condition that the motor operating power remains unchanged, it can output a variety of different torques to the drive wheel of the electric vehicle to adapt to different road conditions.

[0038] Example 3

[0039] Embodiment 3 of this utility model provides a two-wheeled electric vehicle, the driving device of which is the unidirectional transmission motor described in Embodiment 1 or 2.

[0040] Example 4

[0041] Embodiment 4 of this utility model provides an electric scooter, the driving device of which is the unidirectional transmission motor described in Embodiment 1 or 2.

[0042] Example 5

[0043] Embodiment 5 of this utility model provides an electric self-balancing scooter, the driving device of which is the unidirectional transmission motor described in Embodiment 1 or 2.

[0044] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A one-way drive motor for outputting torque to a drive wheel of an electric vehicle, comprising: A motor housing; A stator fixedly installed on the motor housing; A rotor rotatably installed on the motor housing; A conductive coil arranged on the stator and surrounding the outer periphery of the rotor; and a magnetic field generator arranged on the rotor to generate a magnetic field capable of passing through the conductive coil and synchronously rotating with the rotor; characterized in that the rotor comprises a rotating shaft rotatably installed on the motor housing, a rotating body arranged on the rotating shaft and synchronously rotating with the rotating shaft, and a one-way transmission structure arranged on the power output end of the rotating shaft, the motor outputs a positive torque to the driving wheel through the one-way transmission structure, and the driving wheel does not output a torque to the rotating body; an outer side of the one-way transmission structure is provided with a protective cover, the protective cover is installed on the rotating shaft and synchronously rotates with the rotating shaft, an inner side surface of the protective cover is protruded to form an impeller, and the protective cover is gap-fitted with the motor housing.

2. A unidirectional transmission motor as claimed in claim 1, characterized in that The one-way transmission structure is a one-way bearing.

3. A unidirectional transmission motor as claimed in claim 2, characterized in that The one-way bearing is a roller type one-way bearing.

4. The one-way drive motor of claim 2, wherein The one-way bearing is a wedge block type one-way bearing.

5. The one-way drive motor of claim 1, wherein The one-way transmission structure is a ratchet structure.

6. The one-way drive motor of claim 1, wherein The one-way transmission motor further comprises a control module, the control module comprises a speed measuring magnet, a Hall sensor matched with the speed measuring magnet, a controller and an electronic speed regulator, the controller is electrically connected with the speed measuring magnet and the Hall sensor respectively, and the electronic speed regulator is electrically connected with the controller and the conductive coil respectively.

7. An electric vehicle, characterized in that The driving device of the electric vehicle is the one-way transmission motor according to any one of claims 1 to 6.

8. The electric vehicle of claim 7, wherein, The electric vehicle is an electric scooter.

9. The electric vehicle of claim 7, wherein, The electric vehicle is an electric balance car.

10. The electric vehicle of claim 7, wherein, The electric vehicle is a two-wheeled electric vehicle.

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