Lightweight middle motor and electric moped

Abstract

The invention discloses a lightweight 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 present invention relates to the technical field of electric power-assisted vehicles, and in particular to a lightweight mid-mounted motor and an electric power-assisted vehicle. Background Art

[0002] At present, in the mid-mounted motor of an electric assisted bicycle, its outer shell is usually fully metal-enveloped to ensure that the structural strength of the outer shell meets the requirements, thereby ensuring the structural stability and reliability of the entire mid-mounted motor; however, since the entire outer shell is made of metal, the overall weight of the mid-mounted motor is heavy, which is not conducive to adapting to lightweight production requirements.

[0003] In view of the above problems, it is urgent to develop a lightweight mid-mounted motor and electric assisted bicycle that can optimize the layout space and change the material to reduce the overall weight to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a lightweight mid-mounted motor and an electric assisted bicycle, which can reasonably utilize the layout space and make the weight of the entire lightweight mid-mounted motor lighter while ensuring the structural strength.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A lightweight mid-mounted motor, comprising:

[0007] The upper cover module comprises a first connecting member and a first shell, wherein the first connecting member is connected to the inside of the first shell, at least a part of the first connecting member is made of metal material, and at least a part of the first shell is made of non-metal material;

[0008] A lower cover module connected to one side of the upper cover module, the lower cover module comprising a second connecting member and a second shell, the second connecting member is connected to the inside of the second shell, at least a portion of the second connecting member is made of metal, and at least a portion of the second shell is made of non-metallic material;

[0009] A rear end cover module is connected to the lower cover module, the rear end cover module includes a third connecting member and a third shell, the third connecting member is connected to one side of the third shell, at least a portion of the third connecting member is made of non-metallic material, at least a portion of the third shell is made of non-metallic material, and the first shell, the second shell and the third shell are connected to form an outer shell of the lightweight mid-mounted motor; or

[0010] The first shell and the second shell are connected to form an outer shell of the lightweight mid-mounted motor.

[0011] As an optional solution, the first connecting member and the first shell are an integrated structure of in-mold injection molding or are connected by a first fastener, the second connecting member and the second shell are an integrated structure of in-mold injection molding or are connected by a second fastener, and the third connecting member and the third shell are an integrated structure of in-mold injection molding or are connected by a third fastener.

[0012] As an optional solution, the lightweight mid-mounted motor further includes:

[0013] A transmission module is connected through the first housing and the second housing, and the first connecting member and the second connecting member are both in contact with and connected to the transmission module;

[0014] An electric control module connected to the transmission module, and the electric control module is placed between the first housing and the second housing;

[0015] The motor module is disposed between the rear end cover module and the lower cover module, and the second connecting member and the third connecting member are both in contact with and connected to the motor module.

[0016] As an optional solution, the third shell is shielded 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 optional solution, the material of the first shell and / or the second shell and / or the third shell includes at least one light-transmitting material, so that the first shell and / or the second shell and / or the third shell form a light-transmitting area.

[0018] As an optional solution, the lightweight mid-mounted motor further includes:

[0019] The light-emitting component is provided with at least one light-emitting component in the upper cover module and / or the lower cover module and / or the rear end cover module, and the light-emitting component can emit light of corresponding brightness according to the temperature difference when the lightweight mid-mounted motor is working, and the light-transmitting area can transmit light outward.

[0020] As an optional solution, the light emitting component includes:

[0021] A thermoelectric power generation sheet, one side of which is attached to a high-heating area of ​​the lightweight mid-mounted motor, and the other side of which is away from the high-heating area, and the thermoelectric power generation sheet can generate a potential difference through a temperature difference between the two sides;

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

[0023] A light guide is spaced apart from the light source, and the light guide is mounted on the first connecting member and / or the second connecting member and / or the third connecting member, and is used to guide the light emitted by the light source to the light-transmitting area.

[0024] As an optional solution, along the axial projection plane of the second shell, the light source and the light-transmitting area are misaligned, the light guide and the light-transmitting area have an overlapping area, and the light-emitting area of ​​the light source and the light guide are located in the same plane.

[0025] As an optional solution, the light guide is made of a light-transmitting material.

[0026] An electric power-assisted bicycle comprises the lightweight mid-mounted motor as described above.

[0027] The beneficial effects of the present invention are:

[0028] By making the upper cover module include the first connecting piece and the first shell, the lower cover module include the second connecting piece and the second shell, and the rear end cover module include the third connecting piece and the third shell; and 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, and the connection force-bearing position in the lightweight mid-mounted motor is mainly designed on the first connecting piece and the second connecting piece by adopting a reasonable transmission layout, so as to ensure that the structural strength of the first connecting piece and the second connecting piece used for contact connection is high, thereby ensuring the structural stability and reliability of the entire lightweight mid-mounted motor; at the same time, making at least part of the first shell, the second shell and the third shell That is, at least part of the outer shell of the lightweight mid-mounted motor formed by connecting the first shell, the second shell and the third shell is made of non-metallic material, or at least part of the outer shell of the lightweight mid-mounted motor formed by connecting the first shell and the second shell is made of non-metallic material. Compared with setting the entire outer shell to be made of metal material, the overall weight of the entire lightweight mid-mounted motor can be reduced, which is conducive to adapting to lightweight production needs; and at least part of the third connecting member that will not bear a large force load is made of non-metallic material, so as to better reduce the overall weight of the entire lightweight mid-mounted motor, which is further conducive to adapting to lightweight production needs.

[0029] The electric assisted vehicle of the present invention includes the above-mentioned lightweight mid-mounted motor, so that the weight of the entire electric assisted vehicle is relatively light, thereby meeting the lightweight design requirements of the electric assisted vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The structure of the lightweight mid-mounted motor provided by the present invention is shown in FIG. Figure 1 ;

[0031] Figure 2It is a schematic diagram of the exploded structure of the lightweight mid-mounted motor provided by the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the lightweight mid-mounted motor provided by the present invention (the light-emitting component and the rear end cover module are not assembled) Figure 2 ;

[0033] Figure 4 It is a structural schematic diagram of the upper cover module provided by the present invention;

[0034] Figure 5 It is a structural schematic diagram of the lower cover module provided by the present invention;

[0035] Figure 6 It is a structural schematic diagram of the rear end cover module provided by the present invention.

[0036] Description of reference numerals:

[0037] 10- outer shell;

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

[0039] 2-lower cover module; 21-second connecting member; 22-second shell; 221-circumferential ribs;

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

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

[0042] 7-light-emitting component; 71-temperature difference power generation sheet; 72-light source; 73-light guide. DETAILED DESCRIPTION

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

[0044] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0045] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0046] In this embodiment, a lightweight mid-mounted motor and an electric assisted vehicle including the lightweight mid-mounted motor are proposed. The lightweight mid-mounted motor can reasonably utilize the layout space, and while ensuring the structural strength, the weight of the entire lightweight mid-mounted motor is made lighter; and the aesthetic appearance and safe use of the lightweight mid-mounted motor can be ensured, and the service life of the lightweight mid-mounted motor and the entire electric assisted vehicle can be increased.

[0047] That is, the lightweight mid-mounted motor in this embodiment can promote lightweight, improve the shielding protection of the outer shell, extend the service life, and ensure a more beautiful appearance. Among them, the lightweight mid-mounted motor is an integrated mid-mounted motor, and the electric power-assisted vehicle is specifically an electric power-assisted bicycle. The working principle of the lightweight mid-mounted motor can refer to the working principle of the mid-mounted motor in the existing electric power-assisted vehicle, and the working principle of the lightweight mid-mounted motor will not be described in detail here.

[0048] Specifically, Figures 1 to 6 As shown, the lightweight mid-mounted motor includes an upper cover module 1, a lower cover module 2 and a rear end cover module 3; wherein the upper cover module 1 includes a first connecting member 11 and a first shell 12, the first connecting member 11 is connected to the first shell 12, at least part of the first connecting member 11 is made of metal, and at least part of the first shell 12 is made of non-metallic material; the lower cover module 2 is connected to one side of the upper cover module 1, the lower cover module 2 includes a second connecting member 21 and a second shell 22, the second connecting member 21 is connected to the second shell 22, at least part of the second connecting member 21 is made of metal, and at least part of the second shell 22 is made of non-metallic material; the rear end cover module 3 is connected to the lower cover module 2, the rear end cover module 3 includes a third connecting member 31 and The third shell 32, the third connecting member 31 is connected to one side of the third shell 32, at least a part of the third connecting member 31 is made of non-metallic material, at least a part of the third shell 32 is made of non-metallic material, and the first shell 12, the second shell 22 and the third shell 32 are connected to form the outer shell 10 of the lightweight mid-mounted motor, that is, after the entire lightweight mid-mounted motor is assembled, the outer shell 10 that is most enclosed 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 lightweight mid-mounted motor, that is, after the entire lightweight mid-mounted motor is assembled, the outer shell 10 that is most enclosed 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 side of 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 mid-mounted 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 mid-mounted motor.

[0050] Compared with the prior art, the lightweight mid-mounted motor in this embodiment changes the overall layout and part of the material of the lightweight mid-mounted motor; the upper cover module 1 includes the first connecting member 11 and the first shell 12, the lower cover module 2 includes the second connecting member 21 and the second shell 22, and the rear end cover module 3 includes the third connecting member 31 and the third shell 32; and at least part of the first connecting member 11 and the second connecting member 21 is made of metal, that is, the layout space is optimized, and the connection force position in the lightweight mid-mounted motor is mainly designed on the first connecting member 11 and the second connecting member 21 by adopting a reasonable transmission layout, so as to ensure that the first connecting member 11 and the second connecting member 21 for contact connection are connected. The structural strength of the two connecting members 21 is relatively high, thereby ensuring the structural stability and reliability of the entire lightweight mid-mounted motor; at the same time, at least part of the first shell 12, the second shell 22 and the third shell 32 is made of non-metallic material, that is, at least part of the outer shell 10 of the lightweight mid-mounted motor formed by connecting the first shell 12, the second shell 22 and the third shell 32 is made of non-metallic material, or at least part of the outer shell 10 of the lightweight mid-mounted motor formed by connecting the first shell 12 and the second shell 22 is made of non-metallic material. Compared with setting the entire outer shell 10 to be made of metal material, the overall weight of the entire lightweight mid-mounted motor can be reduced, which is conducive to adapting to lightweight production needs.

[0051] Furthermore, by making at least a portion of the third connecting member 31 that will not bear a large force load be made of non-metallic material, the overall weight of the entire lightweight mid-mounted motor can be better reduced, which is further conducive to adapting to lightweight production requirements.

[0052] It is worth noting that, since at least part of the third connecting member 31 is made of non-metallic material, during the assembly of the entire lightweight mid-mounted motor, it is necessary to ensure that the axial force of the entire lightweight mid-mounted motor is away from the third connecting member 31, so that the third connecting member 31 does not bear a large force load, so as to ensure lightweight while increasing the structural connection strength of the entire lightweight mid-mounted motor. Among them, at least part of the third connecting member 31 is made of medium-to-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 electric control module 5 and the motor module 6 are described in detail below:

[0054] Specifically, the first connecting member 11 and the second connecting member 21 can be made of all-metal material, or a combination of partial metal material and partial non-metal material, as long as the structural strength of the first connecting member 11 and the second connecting member 21 can be guaranteed; that is, there is a positioning and matching relationship between the first connecting member 11 and the second connecting member 21 to ensure the connection strength and stability of the entire lightweight mid-mounted motor; and the first connecting member 11, the second connecting member 21 and the third connecting member 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 member 31, the first shell 12, the second shell 22 and the third shell 32 can all be made of non-metallic materials, so as to further reduce the weight of the entire lightweight mid-mounted motor, thereby meeting more extreme lightweight design requirements.

[0056] Furthermore, if Figures 4 to 6 As shown, the first connecting member 11 and the first shell 12 are an integrated structure of in-mold injection molding or are connected by a first fastener, the second connecting member 21 and the second shell 22 are an integrated structure of in-mold injection molding or are connected by a second fastener, and the third connecting member 31 and the third shell 32 are an integrated structure of in-mold injection molding or are connected by a third fastener, so that the connection between the first connecting member 11 and the first shell 12, between the second connecting member 21 and the second shell 22, and between the third connecting member 31 and the third shell 32 is relatively simple and fast, and the connection cost is low.

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

[0058] Specifically, Figures 1 to 3As shown, the lightweight mid-mounted motor also includes a transmission module 4, an electronic 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, and the first connecting member 11 and the second connecting member 21 are both in contact with the transmission module 4, that is, the first connecting member 11 and the second connecting member 21 mainly bear the supporting force from the transmission module 4; the electronic control module 5 is connected to the transmission module 4, and the electronic control module 5 is placed between the first shell 12 and the second shell 22; the motor module 6 is placed between the rear end cover module 3 and the lower cover module 2, and the second connecting member 21 and the third connecting member 31 are both in contact with the motor module 6, that is, the second connecting member 21 mainly bears the supporting force from the motor module 6, and the third connecting member 31 assists in bearing the smaller supporting force from the motor module 6.

[0059] Specifically, if Figures 1 to 3 As shown, the output end shaft gears of the electric control module 5, the transmission module 4, and the motor module 6 are all placed between the upper cover module 1 and the lower cover module 2; the stator assembly and the rotor assembly of the motor module 6 are all placed 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 mid-mounted motor, and their specific structures and working principles are not described in detail here.

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

[0061] At present, since the motor module is a heat source, the motor module has a high heat area. Therefore, the temperature of the area where the all-metal outer shell envelops the motor module will increase with the heat of the motor module, which can easily cause the high-temperature metal outer shell to scald the person who accidentally touches it, causing physical harm to the person, making the entire lightweight mid-mounted motor less safe to use.

[0062] In order to solve the above problems, Figures 1 to 6 As shown, the third shell 32 in this 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 efficient enveloping protection for the motor module 6 through the third shell 32 and the second shell 22 that are at least partially made of non-metallic materials, 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, the heat insulation effect of the third shell 32 and the second shell 22 ensures that the temperature of the third shell 32 and the second shell 22 will not be too high, thereby avoiding the third shell 32 and the second shell 22 in the high-heating area at the end of the outer envelope of the motor module 6 from causing burns to those who accidentally touch it, thereby ensuring that the entire lightweight mid-mounted motor has a higher safety in use; and, the motor module 6 is completely shielded by the third shell 32 and the second shell 22 that are at least partially made of non-metallic materials, so as to improve the appearance.

[0063] Furthermore, at least one of the first housing 12, the second housing 22 and the third housing 32 has a heat dissipation structure for dissipating heat for the entire lightweight mid-mounted motor; specifically, Figures 1 to 6 As shown, a heat dissipation structure is provided on the outer periphery of the second housing 22, and the heat dissipation structure includes a plurality of circumferential ribs 221, and the circumferential ribs 221 are used for heat dissipation. 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 to avoid overheating of the motor module 6, thereby ensuring the stability and reliability of the use of the motor module 6, and further ensuring that the temperature of the third shell 32 and the second shell 22 will not be too high, thereby better avoiding the third shell 32 and the second shell 22 in the high-heating area at the end of the outer envelope of the motor module 6 from causing burns to those who accidentally touch it, making the entire lightweight mid-mounted motor safer to use.

[0065] The light-transmissive area and the light-emitting component 7 are described in detail below:

[0066] At present, since the motor module generates high temperature during operation, and the user is unable to reasonably control the gear according to the specific high temperature conditions, the motor module is easily damaged, thereby reducing the service life of the motor module and the entire lightweight mid-mounted motor.

[0067] In order to solve the above problems, the material of the first shell 12 and / or the second shell 22 and / or the third shell 32 includes at least one light-transmitting material, so that the first shell 12 and / or the second shell 22 and / or the third shell 32 form a light-transmitting area, so that the user can adaptively control the use according to the brightness of the light transmitted from the light-transmitting area, and it is not easy to damage the motor module 6, thereby improving the service life of the motor module 6. In this embodiment, the material of the third shell 32 includes at least one light-transmitting material, that is, a light-transmitting area is formed on the third shell 32, and the light-transmitting area can be formed on the third shell 32 by overmolding or two-color injection molding or other processing technology.

[0068] Furthermore, if Figures 1 to 3As shown, the lightweight mid-mounted motor further includes a light-emitting component 7. The upper cover module 1 and / or the lower cover module 2 and / or the rear end cover module 3 are provided with at least one light-emitting component 7. The light-emitting component 7 can emit light of a corresponding brightness according to the temperature difference when the lightweight mid-mounted motor is working, and the light-transmitting area can transmit light to the outside. In this embodiment, a light-emitting component 7 is provided on the rear end cover module 3. Here, the specific setting position and setting quantity of the light-emitting component 7 are not limited.

[0069] By providing a light-transmitting area and a light-emitting component 7 that cooperate with each other, on the one hand, the entire lightweight mid-mounted motor can produce a light effect during riding, so as to better improve the aesthetic appearance of the lightweight mid-mounted motor; on the other hand, during the user's riding process, if the lightweight mid-mounted motor is in a high-heat state, the user can identify it by observing the brightness of the light emitted from the light-transmitting area, thereby actively reducing the output torque of the motor module 6 for downshifting, that is, on the basis of the existing passive design solutions that only extend the service life of the lightweight mid-mounted motor through component design, thermal protection, etc., the service life of the lightweight mid-mounted motor can be extended from the user's subjective use perspective, thereby maximizing the service life of the lightweight mid-mounted motor.

[0070] Specifically, when the lightweight mid-mounted motor is in a high-heat state, the user can observe that the brightness of the light emitted from the light-transmitting area is brighter, so as to actively reduce the output torque of the motor module 6 and downshift, thereby increasing the service life of the lightweight mid-mounted motor; when the lightweight mid-mounted motor is in a low-heat state, the user can observe that the brightness of the light emitted from the light-transmitting area is weaker, so as to actively increase the output torque of the motor module 6 and upshift, thereby ensuring the high output torque usage requirement of the lightweight mid-mounted motor; thereby, the rational use of the entire lightweight mid-mounted motor can be guaranteed based on the user's subjective perspective.

[0071] Furthermore, if Figure 2 and Figure 3As shown, the light-emitting assembly 7 includes a thermoelectric power generation sheet 71, a light source 72 and a light guide 73; wherein one side of the thermoelectric power generation sheet 71 is attached to the high-heating area of ​​the lightweight mid-mounted motor, and the other side of the thermoelectric power generation sheet 71 is away from the high-heating area, and the thermoelectric power generation sheet 71 can generate a potential difference through the temperature difference on both sides; the light source 72 is installed on the first connecting member 11 and / or the second connecting member 21 and / or the third connecting member 31, and the light source 72 is electrically connected to the thermoelectric power generation sheet 71 to form a circuit. When the potential difference generated by the thermoelectric power generation sheet 71 reaches When the light source 72 reaches a certain value, the formed circuit can be used to drive the light source 72 to light up; the light guide 73 and the light source 72 are spaced apart to facilitate installation of the light guide 73 and the light source 72, and avoid installation interference between the light guide 73 and the light source 72; and the light guide 73 is installed on the first connecting member 11 and / or the second connecting member 21 and / or the third connecting member 31, and the light guide 73 is used to guide the light emitted by the light source 72 to the light-transmitting area, so that the user can observe the light emitted by the light source 72 through the light-transmitting area. In this embodiment, the light guide 73 is fixedly installed on the third connecting member 31.

[0072] Specifically, if Figure 2 and Figure 3 As shown, one side of the thermoelectric power generation sheet 71 is attached to the stator assembly in the motor module 6, and the other side of the thermoelectric power generation sheet 71 is fixedly mounted on the third connecting member 31; so that during the operation of the lightweight mid-mounted motor, the temperature of the side where the thermoelectric power generation sheet 71 is attached to the stator assembly is much higher than the temperature of the other side. At this time, the two sides of the thermoelectric power generation sheet 71 begin to generate a potential difference due to the temperature difference, and as the temperature difference gradually increases, the potential difference generated by the thermoelectric power generation sheet 71 will also gradually increase until thermal equilibrium is reached; when the potential difference reaches a certain value, current can be generated in the circuit formed above, so that the light source 72 can be driven by current to light up. Among them, one side of the thermoelectric power generation sheet 71 can be directly attached to the stator assembly or indirectly attached to the stator assembly through the coated thermal conductive material.

[0073] Furthermore, the light source 72 is electrically connected to the thermoelectric power generation sheet 71 through an electrical connector, and the electrical connector includes at least a connecting harness, and may also include electrical components such as a circuit board, so that different light effects can be achieved by controlling the circuit board under the electrical drive of the thermoelectric power generation sheet 71. The connecting harness and the circuit board may adopt common structures in the prior art.

[0074] Specifically, Figures 1 to 3As shown, along the axial projection plane of the second shell 22, the light source 72 and the light-transmitting area are misaligned, the light guide 73 and the light-transmitting area have overlapping areas, and the light-emitting area of ​​the light source 72 and the light guide 73 are located in the same plane, so as to ensure that the layout of the light source 72, the light-transmitting area and the light guide 73 is relatively reasonable, so that the light emitted by the light source 72 can be evenly guided in the light-transmitting area, and there will be no problem of partial overbrightness or partial overdarkness in the light-transmitting area, which can help to accurately and directly observe the brightness of the light in the light-transmitting area. Among them, the axial direction of the second shell 22 specifically refers to Figure 3 Horizontal direction in .

[0075] Furthermore, the light guide 73 is made of a translucent material, so that the light guide 73 can effectively transmit light and reduce light scattering, so that the light emitted by the lamp source 72 can be more evenly guided to the translucent area of ​​the third shell 32 through the light guide 73, which is further conducive to accurately and directly observing the brightness of the light in the translucent area.

[0076] It is worth noting that the non-metallic material mentioned above can be preferably plastic material; the light-transmitting material mentioned above can be plastic, glass, crystal or optical fiber material. Here, the specific types of non-metallic material and light-transmitting material are not limited.

[0077] The lightweight mid-mounted motor in this embodiment optimizes the layout space and adopts a reasonable transmission layout, so that the forces of the transmission module 4 and the motor module 6 are designed to be on the first connecting member 11 and the second connecting member 21 made of metal materials, thereby ensuring the stability of the overall structure; at the same time, by enveloping the outside through the first shell 12, the second shell 22 and the third shell 32, which are at least partially made of non-metallic materials, and making at least a part of the third connecting member 31 that will not bear a large force load be made of non-metallic material, not only can the entire lightweight mid-mounted motor be enveloped to make the appearance beautiful, but also the lightweight design of the entire lightweight mid-mounted motor can be achieved.

[0078] The lightweight mid-mounted motor in this embodiment is provided with a matching structure of the second shell 22, the third shell 32 and the circumferential ribs 221, so as to ensure effective heat dissipation while avoiding the third shell 32 and the second shell 22 in the high-heating area at the end of the outer envelope of the motor module 6 from causing burns to those who accidentally touch them, thereby ensuring the safety of the entire lightweight mid-mounted motor.

[0079] The lightweight mid-mounted motor in this embodiment is provided with a light-permeable area and a light-emitting component 7 that cooperate with each other, so as to produce a light line effect through the light-permeable area, so as to further improve the aesthetic effect of the entire lightweight mid-mounted motor; and, according to the operating temperature of the motor module 6, the service life of the motor module 6 can be extended from the user's subjective use perspective, thereby maximizing the service life of the entire lightweight mid-mounted motor.

[0080] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A lightweight mid-mounted motor, characterized in that: include: The upper cover module (1) comprises a first connecting member (11) and a first shell (12), wherein the first connecting member (11) is connected to the inside of the first shell (12), at least a portion of the first connecting member (11) is made of metal material, and at least a portion of the first shell (12) is made of non-metal material; A lower cover module (2) is connected to one side of the upper cover module (1), the lower cover module (2) comprises a second connecting member (21) and a second shell (22), the second connecting member (21) is connected to the inside of the second shell (22), at least a portion of the second connecting member (21) is made of metal material, and at least a portion of the second shell (22) is 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 member (31) and a third shell (32), the third connecting member (31) being connected to one side of the third shell (32), at least a portion of the third connecting member (31) being made of a non-metallic material, at least a portion of the third shell (32) being made of a non-metallic 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 lightweight mid-mounted motor; or The first shell (12) and the second shell (22) are connected to form an outer shell (10) of the lightweight mid-mounted motor.

2. The lightweight mid-mounted motor according to claim 1, characterized in that: The first connecting member (11) and the first shell (12) are an integral structure of in-mold overmolding or are connected via a first fastener, the second connecting member (21) and the second shell (22) are an integral structure of in-mold overmolding or are connected via a second fastener, and the third connecting member (31) and the third shell (32) are an integral structure of in-mold overmolding or are connected via a third fastener.

3. The lightweight mid-mounted motor according to claim 1, characterized in that: The lightweight mid-mounted motor also includes: A transmission module (4) is connected through the first housing (12) and the second housing (22); the first connecting member (11) and the second connecting member (21) are both in contact with and connected to the transmission module (4); An electric control module (5) connected to the transmission module (4), the electric control module (5) being disposed between the first housing (12) and the second housing (22); The motor module (6) is disposed between the rear end cover module (3) and the lower cover module (2), and the second connecting member (21) and the third connecting member (31) are both in contact and connected with the motor module (6).

4. The lightweight mid-mounted motor according to claim 3, characterized in that: The third shell (32) is shielded 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 lightweight mid-mounted motor according to any one of claims 1 to 4, characterized in that: The material of the first shell (12) and / or the second shell (22) and / or the third shell (32) includes at least one light-transmitting material, so that the first shell (12) and / or the second shell (22) and / or the third shell (32) form a light-transmitting area.

6. The lightweight mid-mounted motor according to claim 5, characterized in that: The lightweight mid-mounted motor also includes: A light-emitting component (7), wherein the upper cover module (1) and / or the lower cover module (2) and / or the rear end cover module (3) are provided with at least one of the light-emitting components (7), and the light-emitting component (7) can emit light of a corresponding brightness according to a temperature difference when the lightweight mid-mounted motor is in operation, and the light-transmitting area can transmit light outwardly.

7. The lightweight mid-mounted motor according to claim 6, characterized in that: The light emitting component (7) comprises: A temperature difference power generation sheet (71), wherein one side of the temperature difference power generation sheet (71) is attached to a high-heating area of ​​the lightweight mid-mounted motor, and the other side of the temperature difference power generation sheet (71) is away from the high-heating area, and the temperature difference power generation sheet (71) can generate a potential difference through a temperature difference between the two sides; a light source (72), the light source (72) being mounted on the first connecting member (11) and / or the second connecting member (21) and / or the third connecting member (31), the light source (72) being electrically connected to the temperature difference power generation sheet (71) to form a circuit; A light guide (73) is arranged at a distance from the light source (72); the light guide (73) is installed on the first connecting member (11) and / or the second connecting member (21) and / or the third connecting member (31); the light guide (73) is used to guide the light emitted by the light source (72) to the light-transmitting area.

8. The lightweight mid-mounted motor according to claim 7, characterized in that: On the axial projection plane along the second shell (22), the light source (72) and the light-transmitting area are misaligned, the light guide (73) and the light-transmitting area have an overlapping area, and the light-emitting area of ​​the light source (72) and the light guide (73) are located in the same plane.

9. The lightweight mid-mounted motor according to claim 7 or 8, characterized in that: The light guide (73) is made of a light-transmitting material.

10. An electric power-assisted vehicle, characterized in that: It comprises a lightweight mid-mounted motor as described in any one of claims 1-9.

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