Lightweight middle motor and electric moped

Abstract

The utility model discloses a light-weight middle motor and an electric moped, and belongs to the technical field of electric mopeds. The lightweight mid-motor comprises an upper cover module, a lower cover module and a rear end cover module. The upper cover module comprises a first connecting piece and a first shell, the first connecting piece is connected into the first shell, at least part of the first connecting piece is made of a metal material, and at least part of the first shell is made of a non-metal material; the lower cover module comprises a second connecting piece and a second shell, the second connecting piece is connected into the second shell, at least part of the second connecting piece is made of a metal material, and at least part of the second shell is made of a non-metal material; the rear end cover module comprises a third connecting piece and a third shell, the third connecting piece is connected to one side of the third shell, at least part of the third connecting piece and at least part of the third shell are made of non-metal materials, and the first shell, the second shell and the third shell form an outer shell; or the first shell and the second shell form the outer shell, so that the weight of the lightweight middle motor is light.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric moped technical field especially relates to a kind of lightweight middle motor and electric moped. BACKGROUND

[0002] At present, in the middle motor of electric power-assisted bicycle, its shell body is usually full metal envelope, to be able to guarantee the structural strength of shell body to meet the demand, to guarantee the structural stability and reliability of entire middle motor;However, since the entire shell body is metal material, leading to the overall weight of middle motor is heavy, it is not conducive to adapt to the production demand of lightweight.

[0003] For the above problems, it is urgent to develop a kind of lightweight middle motor and electric moped which can optimize layout space and change material to reduce overall weight to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at presenting a kind of lightweight middle motor and electric moped, can reasonably utilize layout space, while guaranteeing structural strength, so that the weight of entire lightweight middle motor is lighter.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A kind of lightweight middle motor, comprising:

[0007] Upper cover module, including first connecting piece and first shell, the first connecting piece is connected in the first shell, at least part of the first connecting piece is metal material, at least part of the first shell is non-metal material quality;

[0008] Lower cover module, connected to one side of the upper cover module, the lower cover module includes second connecting piece and second shell, the second connecting piece is connected in the second shell, at least part of the second connecting piece is metal material, at least part of the second shell is non-metal material quality;

[0009] Rear end cover module, connected to the lower cover module, the rear end cover module includes third connecting piece and third shell, the third connecting piece is connected to one side of the third shell, at least part of the third connecting piece is non-metal material, at least part of the third shell is non-metal material, and the first shell, the second shell and the third shell are connected to form the shell body of the lightweight middle motor;Or

[0010] The first shell and the second shell are connected to form the shell body of the lightweight middle motor.

[0011] As an option, the first connecting piece and the first shell are an integrally-structured injection molding or connected through a first fastener, the second connecting piece and the second shell are an integrally-structured injection molding or connected through a second fastener, and the third connecting piece and the third shell are an integrally-structured injection molding or connected through a third fastener.

[0012] As an option, the lightweight middle motor further comprises:

[0013] A transmission module is connected through the first shell and the second shell, and the first connecting piece and the second connecting piece are in contact with the transmission module;

[0014] An electronic control module is connected with the transmission module, and the electronic control module is arranged between the first shell and the second shell;

[0015] A motor module is arranged between the rear end cover module and the lower cover module, and the second connecting piece and the third connecting piece are in contact with the motor module.

[0016] As an option, the third shell is arranged outside the motor module, and at least one of the first shell, the second shell, and the third shell is provided with a heat dissipation structure.

[0017] As an option, the material of the first shell and / or the second shell and / or the third shell comprises at least one light-transmitting material, so that the first shell and / or the second shell and / or the third shell is formed with a light-transmitting region.

[0018] As an option, the lightweight middle motor further comprises:

[0019] A light-emitting assembly is arranged on at least one of the upper cover module, the lower cover module, and the rear end cover module, and the light-emitting assembly can emit light with a brightness corresponding to the temperature difference of the lightweight middle motor during operation, and the light-transmitting region can transmit the light outward.

[0020] As an option, the light-emitting assembly comprises:

[0021] A thermoelectric power sheet is attached to a high-heat area of the lightweight middle motor on one side, and is away from the high-heat area on the other side, and the thermoelectric power sheet can generate a potential difference through the temperature difference between the two sides;

[0022] A light source is installed on the first connecting piece, the second connecting piece, and / or the third connecting piece, and the light source is electrically connected with the thermoelectric power sheet to form a circuit;

[0023] A light guide body is disposed apart from the lamp source, the light guide body is mounted on the first connecting piece, the second connecting piece and / or the third connecting piece, and the light guide body is used to guide the light emitted by the lamp source to the light-transmissive region.

[0024] As an option, along the axial projection plane of the second housing, the lamp source is misaligned with the light-transmissive region, the light guide body overlaps the light-transmissive region, and the light-emitting region of the lamp source is located in the same plane as the light guide body.

[0025] As an option, the light guide body is made of a light-transmissive material.

[0026] An electric moped includes the lightweight middle motor as described above.

[0027] The electric moped has the following advantages:

[0028] By making the upper cover module include the first connecting piece and the first housing, the lower cover module include the second connecting piece and the second housing, and the rear end cover module include the third connecting piece and the third housing, and by making at least part of the first connecting piece and the second connecting piece be made of metal, that is, the layout space is optimized to adopt a reasonable transmission layout to mainly design the connection stress position in the lightweight middle motor on the first connecting piece and the second connecting piece, so as to ensure that the structure strength of the first connecting piece and the second connecting piece for contact connection is high, thereby ensuring the structural stability and reliability of the entire lightweight middle motor. At the same time, at least part of the first housing, the second housing and the third housing are made of non-metal material, that is, at least part of the outer housing of the lightweight middle motor formed by the connection of the first housing, the second housing and the third housing is made of non-metal material, or at least part of the outer housing of the lightweight middle motor formed by the connection of the first housing and the second housing is made of non-metal material, which can reduce the overall weight of the entire lightweight middle motor compared with setting the entire outer housing to be made of metal, and is conducive to adapting to the production demand of lightweight. In addition, at least part of the third connecting piece which will not bear a large stress load is made of non-metal material, so as to better reduce the overall weight of the entire lightweight middle motor, and further facilitate the production demand of lightweight.

[0029] The electric moped of the utility model has the advantages that the electric moped includes the lightweight middle motor as described above, so as to make the weight of the entire electric moped lighter, thereby meeting the lightweight design demand of the electric moped. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of the lightweight middle motor provided by the utility model Figure 1 ;

[0031] Figure 2It is the exploded structure schematic view of the light-weight middle motor provided by the utility model;

[0032] Figure 3 It is the structure schematic view of the light-weight middle motor (luminescent assembly and rear end cover module are not assembled) provided by the utility model Figure 2 ;

[0033] Figure 4 It is the structure schematic view of the upper cover module provided by the utility model;

[0034] Figure 5 It is the structure schematic view of the lower cover module provided by the utility model;

[0035] Figure 6 It is the structure schematic view of the rear end cover module provided by the utility model.

[0036] Mark explanation:

[0037] 10-outer shell body;

[0038] 1-upper cover module;11-first connecting piece;12-first shell body;

[0039] 2-lower cover module;21-second connecting piece;22-second shell body;221-circumferential rib;

[0040] 3-rear end cover module;31-third connecting piece;32-third shell body;

[0041] 4-transmission module;5-electric control module;6-motor module;

[0042] 7-luminescent assembly;71-thermoelectric power piece;72-light source;73-light guide body. Specific implementation

[0043] All the features disclosed in the specification, or the steps of all the methods disclosed in the specification, can be combined in any manner, except for mutually exclusive features and / or steps.

[0044] Any feature disclosed in the specification, unless specifically stated otherwise, can be replaced by an alternative feature or a feature with a similar purpose. That is, unless specifically stated otherwise, each feature is one example only of a number of equivalent or similar features. Throughout this specification the same reference numerals refer to the same elements in all figures.

[0045] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model will be further explained by specific implementation manners in combination with the drawings below.

[0046] The embodiment provides a light-weight middle motor and an electric moped comprising the light-weight middle motor, the light-weight middle motor can reasonably utilize layout space, ensures structural strength, and makes the whole light-weight middle motor lighter; and the light-weight middle motor can ensure appearance aesthetics and safe usability, and improve the service life of the light-weight middle motor and the whole electric moped.

[0047] That is, the light-weight middle motor can promote weight reduction, improve shielding protection of the shell, prolong the service life, and ensure more beautiful appearance. The light-weight middle motor is an integrated middle motor, the electric moped is specifically an electric moped bicycle, and the working principle of the light-weight middle motor can refer to the working principle of the middle motor in the existing electric moped, and the working principle of the light-weight middle motor will not be described in detail here.

[0048] Specifically, as shown in the figure, Figures 1 to 6 The light-weight middle motor comprises an upper cover module 1, a lower cover module 2 and a rear end cover module 3; the upper cover module 1 comprises a first connecting piece 11 and a first shell 12, the first connecting piece 11 is connected in the first shell 12, at least part of the first connecting piece 11 is metal material, and at least part of the first shell 12 is non-metal material; the lower cover module 2 is connected to one side of the upper cover module 1, the lower cover module 2 comprises a second connecting piece 21 and a second shell 22, the second connecting piece 21 is connected in the second shell 22, at least part of the second connecting piece 21 is metal material, and at least part of the second shell 22 is non-metal material; the rear end cover module 3 is connected to the lower cover module 2, the rear end cover module 3 comprises a third connecting piece 31 and a third shell 32, the third connecting piece 31 is connected to one side of the third shell 32, at least part of the third connecting piece 31 is non-metal material, at least part of the third shell 32 is non-metal material, and the first shell 12, the second shell 22 and the third shell 32 are connected to form an outer shell 10 of the light-weight middle motor, that is, after the whole light-weight middle motor is assembled, the outer shell 10 on the outermost side is only the first shell 12, the second shell 22 and the third shell 32; or the first shell 12 and the second shell 22 are connected to form the outer shell 10 of the light-weight middle motor, that is, after the whole light-weight middle motor is assembled, the outer shell 10 on the outermost side is only the first shell 12 and the second shell 22.

[0049] Specifically, in this embodiment, the rear end cover module 3 is connected to the lower cover module 2 away from the upper cover module 1, so that the first shell 12, the second shell 22 and the third shell 32 are connected to each other to form the outer shell 10 of the lightweight in-wheel motor. In other embodiments, the rear end cover module 3 can also be connected to the second shell 22 of the lower cover module 2, so that the first shell 12 and the second shell 22 are connected to each other to form the outer shell 10 of the lightweight in-wheel motor.

[0050] The lightweight in-wheel motor in this embodiment changes the overall layout and part of the material of the lightweight in-wheel motor compared with the prior art. By making the upper cover module 1 include the first connecting piece 11 and the first shell 12, the lower cover module 2 include the second connecting piece 21 and the second shell 22, and the rear end cover module 3 include the third connecting piece 31 and the third shell 32, and making at least part of the first connecting piece 11 and the second connecting piece 21 be metal material, that is, optimizing the layout space, adopting a reasonable transmission layout to mainly design the connection stress position in the lightweight in-wheel motor on the first connecting piece 11 and the second connecting piece 21, so as to ensure that the structure strength of the first connecting piece 11 and the second connecting piece 21 for contact connection is high, thereby ensuring the structural stability and reliability of the entire lightweight in-wheel motor. At the same time, at least part of the first shell 12, the second shell 22 and the third shell 32 is non-metal material, that is, at least part of the outer shell 10 of the lightweight in-wheel motor formed by the first shell 12, the second shell 22 and the third shell 32 is non-metal material, or at least part of the outer shell 10 of the lightweight in-wheel motor formed by the first shell 12 and the second shell 22 is non-metal material, compared with setting the entire outer shell 10 as metal material, the overall weight of the entire lightweight in-wheel motor can be reduced, which is conducive to adapting to the production demand of lightweight.

[0051] Moreover, by making at least part of the third connecting piece 31 which will not bear a large stress load be non-metal material, the overall weight of the entire lightweight in-wheel motor can be better reduced, which is further conducive to adapting to the production demand of lightweight.

[0052] It is worth noting that since at least part of the third connecting piece 31 is non-metal material, during the assembly of the entire lightweight in-wheel motor, it is necessary to ensure that the axial stress of the entire lightweight in-wheel motor is away from the third connecting piece 31, so that the third connecting piece 31 will not bear a large stress load, so as to ensure the structural connection strength of the entire lightweight in-wheel motor while ensuring lightweight. At least part of the third connecting piece 31 is a medium-high strength plastic material.

[0053] The upper cover module 1, the lower cover module 2, the rear end cover module 3, the transmission module 4, the electronic control module 5 and the motor module 6 will be described in detail below:

[0054] Specifically, the first connecting piece 11 and the second connecting piece 21 can be all-metal material, or can be a combination of local metal material and local non-metal material, as long as the structural strength of the first connecting piece 11 and the second connecting piece 21 can be guaranteed; that is, the first connecting piece 11 and the second connecting piece 21 have a positioning and matching relationship with each other, so as to guarantee the connection strength and stability of the entire lightweight center motor; and the first connecting piece 11, the second connecting piece 21 and the third connecting piece 31 can also be used to strengthen the structural rigidity of the first shell 12, the second shell 22 and the third shell 32, respectively.

[0055] Specifically, the third connecting piece 31, the first shell 12, the second shell 22 and the third shell 32 can all be full non-metal material, so as to further reduce the weight of the entire lightweight center motor, thereby meeting the more extreme lightweight design requirements.

[0056] Further, as shown in Figures 4 to 6 The first connecting piece 11 and the first shell 12 are a mold-in-gel injection molding integrated structure or are connected by a first fastener, the second connecting piece 21 and the second shell 22 are a mold-in-gel injection molding integrated structure or are connected by a second fastener, and the third connecting piece 31 and the third shell 32 are a mold-in-gel injection molding integrated structure or are connected by a third fastener, so as to make the connection between the first connecting piece 11 and the first shell 12, the second connecting piece 21 and the second shell 22, and the third connecting piece 31 and the third shell 32 relatively simple and fastened, and the connection cost is relatively low.

[0057] In other embodiments, the first connecting piece 11 and the first shell 12, the second connecting piece 21 and the second shell 22, and the third connecting piece 31 and the third shell 32 can also be connected by double-color injection molding, adhesive, interference connection, riveting or welding connection; here, the specific connection method is not limited, and needs to be determined according to the actual connection requirements and specific working conditions.

[0058] Specifically, as shown in Figures 1 to 3As shown, the lightweight middle motor further comprises a transmission module 4, an electric control module 5, and a motor module 6; wherein the transmission module 4 is connected through the first shell 12 and the second shell 22, the first connecting piece 11 and the second connecting piece 21 are both in contact with the transmission module 4, that is, the first connecting piece 11 and the second connecting piece 21 mainly bear the supporting force from the transmission module 4; the electric control module 5 is connected with the transmission module 4, and the electric control module 5 is arranged between the first shell 12 and the second shell 22; the motor module 6 is arranged between the rear end cover module 3 and the lower cover module 2, and the second connecting piece 21 and the third connecting piece 31 are both in contact with the motor module 6, that is, the second connecting piece 21 mainly bears the supporting force from the motor module 6, and the third connecting piece 31 assists to bear the smaller supporting force from the motor module 6.

[0059] Specifically, as shown in the figure, Figures 1 to 3 the output shaft teeth of the electric control module 5, the transmission module 4, and the motor module 6 are all arranged between the upper cover module 1 and the lower cover module 2; and the stator assembly and the rotor assembly of the motor module 6 are both arranged between the lower cover module 2 and the rear end cover module 3. Among them, the electric control module 5, the transmission module 4, and the motor module 6 are all common structures in the existing middle motor, and here, the specific structure and working principle will not be described in detail.

[0060] The heat dissipation of the motor module 6 is described in detail as follows:

[0061] At present, since the motor module is a heat source, the motor module has a high heat area, so the temperature of the outer shell of the full metal material enveloping the motor module area will rise with the heating of the motor module, which is easy to cause the high-heat metal shell to scald the toucher, causing physical harm to the toucher, and making the use safety of the entire lightweight middle motor lower.

[0062] In order to solve the above problems, as shown in the figure, Figures 1 to 6 the third shell 32 in the embodiment cooperates with the second shell 22 of the lower cover module 2 to envelop and shield the motor module 6, so as to ensure the efficient enveloping and shielding effect of the motor module 6 through the third shell 32 and the second shell 22 which are at least partially made of non-metal material, so as to reduce the heat generated by the motor module 6 from being conducted to the third shell 32 and the second shell 22, that is, through the heat insulation effect of the third shell 32 and the second shell 22, the temperature of the third shell 32 and the second shell 22 will not be too high, thereby avoiding that the third shell 32 and the second shell 22 of the high-heat area at the outer envelope end of the motor module 6 will scald the toucher, and further ensuring that the use safety of the entire lightweight middle motor is higher; and the third shell 32 and the second shell 22 which are at least partially made of non-metal material completely shield the motor module 6, so as to improve the appearance aesthetics.

[0063] Further, at least one of the first shell 12, the second shell 22 and the third shell 32 has a heat dissipation structure for dissipating heat of the entire lightweight middle motor. Specifically, as shown in Figures 1 to 6 the second shell 22 is provided with a heat dissipation structure, and the heat dissipation structure includes a plurality of circumferential ribs 221 for dissipating heat. The specific structure and number of the circumferential ribs 221 are not limited, as long as the heat dissipation effect of the motor module 6 can be ensured by each circumferential rib 221.

[0064] By providing the circumferential ribs 221, effective heat dissipation can be achieved through the circumferential ribs 221, that is, the motor module 6 can be effectively cooled during riding, avoiding overheating of the motor module 6, thereby ensuring the stability and reliability of the motor module 6, further preventing the third shell 32 and the second shell 22 of the high-heat area at the end of the outer envelope of the motor module 6 from causing burns to the touchers, and making the use of the entire lightweight middle motor safer.

[0065] The light-transmissible area and the light-emitting assembly 7 will be described in detail as follows:

[0066] At present, since the motor module generates high temperature during operation, the user cannot reasonably control the use according to the specific high temperature condition, and thus the motor module is easily damaged, reducing the service life of the motor module and the entire lightweight middle motor.

[0067] To solve the above problems, the material of the first shell 12 and / or the second shell 22 and / or the third shell 32 at least includes a light-transmissible material, so that the first shell 12 and / or the second shell 22 and / or the third shell 32 is formed with a light-transmissible area, thereby enabling the user to adaptively control the use according to the brightness of the light transmitted by the light-transmissible area, and the motor module 6 is not easily damaged, thereby improving the service life of the motor module 6. In the present embodiment, the material of the third shell 32 at least includes a light-transmissible material, that is, the third shell 32 is formed with a light-transmissible area, and the light-transmissible area can be formed on the third shell 32 by gluing injection molding or double-color injection molding or other processing technology.

[0068] Further, as shown in Figures 1 to 3As shown, the lightweight middle motor further comprises a light-emitting assembly 7, the upper cover module 1 and / or the lower cover module 2 and / or the rear end cover module 3 is provided with at least one light-emitting assembly 7, the light-emitting assembly 7 can emit light with corresponding brightness according to the temperature difference when the lightweight middle motor works, and the light-transmitting area can transmit light outward. In the embodiment, one light-emitting assembly 7 is arranged on the rear end cover module 3. Here, the specific arrangement position and the number of the light-emitting assembly 7 are not limited.

[0069] By arranging the light-transmitting area and the light-emitting assembly 7 which are used in cooperation, on the one hand, the entire lightweight middle motor can produce light effect during riding, so as to better improve the appearance aesthetics of the lightweight middle motor; on the other hand, during the riding of the user, if the lightweight middle motor is in a high heating state, the user can identify by observing the brightness of the light transmitted outward by the light-transmitting area, so as to actively reduce the output torque of the motor module 6 for downshift use, that is, on the basis of prolonging the service life of the lightweight middle motor by the existing passive design scheme such as component design and thermal protection, the service life of the lightweight middle motor is prolonged from the subjective use of the user, so as to maximize the service life of the lightweight middle motor.

[0070] Specifically, when the lightweight middle motor is in a high heating state, the user can actively reduce the output torque of the motor module 6 for downshift use by observing the brightness of the light transmitted outward by the light-transmitting area, so as to improve the service life of the lightweight middle motor; when the lightweight middle motor is in a low heating state, the user can actively increase the output torque of the motor module 6 for upshift use by observing the brightness of the light transmitted outward by the light-transmitting area, so as to ensure the use demand of high output torque of the lightweight middle motor; so as to ensure the reasonable use of the entire lightweight middle motor according to the subjective angle of the user.

[0071] Further, as shown in FIG. 6, the light-transmitting area and the light-emitting assembly 7 are arranged on the upper cover module 1 and the lower cover module 2. Figure 2 and Figure 3As shown, the light-emitting component 7 includes a thermoelectric generator 71, a light source 72, and a light guide 73. One side of the thermoelectric generator 71 is attached to the high-heat area of ​​the lightweight mid-mounted motor, while the other side is away from the high-heat area. The thermoelectric generator 71 can generate a potential difference through the temperature difference between its two sides. The light source 72 is mounted on the first connector 11 and / or the second connector 21 and / or the third connector 31. The light source 72 is electrically connected to the thermoelectric generator 71 to form a circuit. When the potential difference generated by the thermoelectric generator 71 reaches... Once a certain value is reached, the formed circuit can drive the lamp source 72 to illuminate. The light guide 73 is spaced apart from the lamp source 72 to facilitate the installation of the light guide 73 and the lamp source 72, avoiding installation interference between the light guide 73 and the lamp source 72. The light guide 73 is installed on the first connector 11 and / or the second connector 21 and / or the third connector 31. The light guide 73 guides the light emitted from the lamp source 72 to a light-transmitting area, allowing the user to easily observe the light emitted from the lamp source 72 through the light-transmitting area. In this embodiment, the light guide 73 is fixedly installed on the third connector 31.

[0072] Specifically, such as Figure 2 and Figure 3 As shown, one side of the thermoelectric generator 71 is attached to the stator assembly in the motor module 6, and the other side of the thermoelectric generator 71 is fixedly mounted on the third connector 31. This ensures that during operation of the lightweight mid-drive motor, the temperature of the side of the thermoelectric generator 71 attached to the stator assembly is much higher than the temperature of the other side. At this time, a potential difference is generated on both sides of the thermoelectric generator 71 due to the temperature difference. As the temperature difference gradually increases, the potential difference generated by the thermoelectric generator 71 also gradually increases until thermal equilibrium is reached. When the potential difference reaches a certain value, current is generated in the circuit formed above, thereby driving the lamp source 72 to illuminate. One side of the thermoelectric generator 71 can be directly attached to or indirectly attached to the stator assembly through a coated thermally conductive material.

[0073] Furthermore, the light source 72 and the thermoelectric generator 71 are electrically connected via an electrical connector, which includes at least a connecting wire harness and may also include electrical components such as a circuit board, so that different lighting effects can be achieved by controlling the circuit board under the electrical drive of the thermoelectric generator 71. The connecting wire harness and circuit board can adopt structures commonly found in existing technologies.

[0074] Specifically, such as Figures 1 to 3As shown, in the axial projection plane of the second housing 22, the light source 72 is misaligned with the light-transmissive region, the light guide 73 overlaps the light-transmissive region, and the light-emitting region of the light source 72 is in the same plane as the light guide 73, so as to ensure that the light source 72, the light-transmissive region, and the light guide 73 are arranged reasonably relative to each other, thereby enabling the light emitted by the light source 72 to be uniformly guided to the light-transmissive region, without causing local over-brightness or local under-brightness in the light-transmissive region, and thus facilitating accurate and direct observation of the brightness of the light in the light-transmissive region. The axial direction of the second housing 22 specifically refers to the lateral direction in the second housing 22. Figure 3

[0075] Further, the light guide 73 is made of a light-transmissive material, so that the light guide 73 can effectively transmit light and reduce scattering of the light, thereby enabling the light emitted by the light source 72 to be more uniformly guided to the light-transmissive region of the third housing 32 through the light guide 73, and further facilitating accurate and direct observation of the brightness of the light in the light-transmissive region.

[0076] It should be noted that the non-metal material mentioned above can be preferably plastic material; and the light-transmissive material mentioned above can be plastic, glass, crystal, or optical fiber material. Here, the specific types of the non-metal material and the light-transmissive material are not limited.

[0077] The lightweight in-wheel motor in the embodiment optimizes the layout space to adopt a reasonable transmission layout, and the stress of the transmission module 4 and the motor module 6 is designed on the first connecting member 11 and the second connecting member 21 made of metal material, so as to ensure the stability of the overall structure. At the same time, the first housing 12, the second housing 22, and the third housing 32 made at least partially of non-metal material are used for outer envelope, and at least part of the third connecting member 31 that does not bear a large stress load is made of non-metal material, which not only realizes the envelope of the entire lightweight in-wheel motor, so that the appearance is beautiful, but also realizes the lightweight design of the entire lightweight in-wheel motor.

[0078] The lightweight in-wheel motor in the embodiment is provided with the second housing 22, the third housing 32, and the circumferential rib 221 matched structure, so as to ensure effective heat dissipation while avoiding the third housing 32 and the second housing 22 of the high-heat area at the end of the outer envelope of the motor module 6 from causing burns to the toucher, thereby ensuring the use safety of the entire lightweight in-wheel motor.

[0079] ​The light-transmissible area and the light-emitting assembly 7 are arranged to cooperate with each other, so that the light-transmissible area can generate a lamp line effect, and the appearance of the light-weighted middle motor can be further improved; and the service life of the motor module 6 can be prolonged from the subjective use of the user according to the working temperature of the motor module 6, so that the service life of the light-weighted middle motor can be maximized.

[0080] The above merely describes the preferred embodiments of the present application, and for those skilled in the art, the specific implementation manner and application scope can be changed according to the thought of the present application, and the content of the description should not be understood as the limitation of the present application.

Claims

1. A lightweight middle motor, characterized by, The application relates to a light-weight middle motor, which comprises: an upper cover module (1) comprising a first connecting piece (11) and a first shell (12), the first connecting piece (11) being connected in the first shell (12), at least part of the first connecting piece (11) being made of metal, and at least part of the first shell (12) being made of non-metal material; a lower cover module (2) connected to one side of the upper cover module (1), the lower cover module (2) comprising a second connecting piece (21) and a second shell (22), the second connecting piece (21) being connected in the second shell (22), at least part of the second connecting piece (21) being made of metal, and at least part of the second shell (22) being made of non-metal material; a rear end cover module (3) connected to the lower cover module (2), the rear end cover module (3) comprising a third connecting piece (31) and a third shell (32), the third connecting piece (31) being connected to one side of the third shell (32), at least part of the third connecting piece (31) being made of non-metal material, at least part of the third shell (32) being made of non-metal material, and the first shell (12), the second shell (22) and the third shell (32) being connected to form an outer shell (10) of the light-weight middle motor; or the first shell (12) and the second shell (22) are connected to form an outer shell (10) of the light-weight middle motor.

2. The light-weight IPM of claim 1, wherein, The first connecting piece (11) and the first shell (12) are an in-mold encapsulation injection molding integrated structure or are connected through a first fastener, the second connecting piece (21) and the second shell (22) are an in-mold encapsulation injection molding integrated structure or are connected through a second fastener, and the third connecting piece (31) and the third shell (32) are an in-mold encapsulation injection molding integrated structure or are connected through a third fastener.

3. The light-weight IPM of claim 1, wherein, The light-weight middle motor further comprises: a transmission module (4) connected through the first shell (12) and the second shell (22), the first connecting piece (11) and the second connecting piece (21) being in contact with the transmission module (4); an electric control module (5) connected with the transmission module (4), the electric control module (5) being arranged between the first shell (12) and the second shell (22); a motor module (6) arranged between the rear end cover module (3) and the lower cover module (2), the second connecting piece (21) and the third connecting piece (31) being in contact with the motor module (6).

4. The light-weight IPM of claim 3, wherein, The third shell (32) is arranged outside the motor module (6), and at least one of the first shell (12), the second shell (22) and the third shell (32) is provided with a heat dissipation structure.

5. The light-weight IPM of any one of claims 1-4, wherein, The material of the first shell (12) and / or the second shell (22) and / or the third shell (32) comprises at least one light-transmitting material, so that the first shell (12) and / or the second shell (22) and / or the third shell (32) are formed with a light-transmitting region.

6. The light-weight IPM of claim 5, wherein, The light-weight middle motor further comprises: The upper cover module (1) and / or the lower cover module (2) and / or the rear end cover module (3) is provided with at least one light-emitting assembly (7), which can emit light with a brightness corresponding to the temperature difference of the light-weighted middle motor during operation, and the light-transmissible area can transmit light outward.

7. The light-weight IPM of claim 6, wherein, The light-emitting assembly (7) comprises: A thermoelectric power sheet (71) is attached to one side of the light-weighted middle motor in a high heat area, and the other side of the thermoelectric power sheet (71) is away from the high heat area. The thermoelectric power sheet (71) can generate a potential difference through the temperature difference between the two sides. A light source (72) is installed on the first connecting piece (11) and / or the second connecting piece (21) and / or the third connecting piece (31), and the light source (72) is electrically connected with the thermoelectric power sheet (71) to form a circuit. A light guide body (73) is arranged apart from the light source (72), and the light guide body (73) is installed on the first connecting piece (11) and / or the second connecting piece (21) and / or the third connecting piece (31), and the light guide body (73) is used to guide the light emitted by the light source (72) to the light-transmissible area.

8. The light-weight IPM of claim 7, wherein, Along the axial projection plane of the second shell (22), the light source (72) is misaligned with the light-transmissible area, the light guide body (73) overlaps with the light-transmissible area, and the light-emitting area of the light source (72) is located in the same plane as the light guide body (73).

9. The light-weight IPM of claim 7 or 8, wherein, The material of the light guide body (73) is a light-transmissible material.

10. An electric assist bicycle characterized by comprising: The light-weighted middle motor comprises the light-emitting assembly (7) as claimed in any one of claims 1-9.

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