A high-low voltage switching device for an electric machine, an electric machine and a power device

Abstract

The application provides a high-low voltage switching device for an electric machine, an electric machine and a power device. The high-low voltage switching device has a high voltage state and a low voltage state. The high-low voltage switching device comprises an attraction component, a high voltage busbar component, a low voltage busbar component and a connecting component. The attraction component comprises an attraction part and a driving part in driving connection with the attraction part. The driving part is used to drive the attraction part to be attracted to or disconnected from the driving part, so as to switch the high-low voltage switching device between the high voltage state and the low voltage state. The high voltage busbar component is arranged around the circumference of the attraction part and can move with the attraction part. The low voltage busbar component is arranged around the circumference of the attraction part and can move with the attraction part. The connecting component is fixed between the high voltage busbar component and the low voltage busbar component. The connecting component is used to electrically connect the outgoing line end of the electric machine. The high-low voltage switching device can reduce the error rate of the electric machine, thereby improving the working efficiency.

Description

Technical Field

[0001] This application relates to the field of motor technology, specifically to a high-low voltage switching device for a motor, a motor, and a power device including the motor. Background Technology

[0002] Currently, motors can be equipped with two independent windings—a high-voltage winding and a low-voltage winding—to produce different voltages and thus output different torques to adapt to different environments, which allows them to be widely used.

[0003] However, in related technologies, the two independent windings may interfere with each other, making the dual-voltage motor prone to errors and resulting in a decrease in its working efficiency. Summary of the Invention

[0004] This application provides a high / low voltage switching device for an electric motor, an electric motor, and a power device including the electric motor. The high / low voltage switching device can reduce the error rate of the electric motor, thereby improving its working efficiency.

[0005] In a first aspect, this application provides a high-low voltage switching device for a motor, the high-low voltage switching device having a high voltage state and a low voltage state, and including a pull-in component, a high voltage bus component, a low voltage bus component, and a connecting component. The pull-in component includes a pull-in portion and a driving portion drivenly connected to the pull-in portion, the driving portion driving the pull-in portion to engage or disengage with the driving portion, thereby switching the high-low voltage switching device between the high voltage state and the low voltage state. The high voltage bus component is circumferentially arranged around the pull-in portion and is movable with the pull-in portion. The low voltage bus component is circumferentially arranged around the pull-in portion and is movable with the pull-in portion. The connecting component is fixedly located between the high voltage bus component and the low voltage bus component, and the connecting component is used to electrically connect the output terminals of the motor.

[0006] In the high-low voltage switching device provided in the embodiments of this application, the driving part of the attracting component can drive the attracting part to engage or disengage with the driving part, so that the high-low voltage switching device switches between a high voltage state and a low voltage state. This can drive the high voltage bus component or the low voltage bus component to be electrically connected to the connecting component, thereby enabling the motor to have high voltage and low voltage under one set of windings, thereby avoiding mutual interference between the two sets of windings, reducing the error rate of the motor, and improving its working efficiency.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the suction part includes a first cylinder, a first cover and a first iron core. The first cylinder has a first receiving cavity with openings at both ends. The first cover is connected to the outer peripheral wall of the first cylinder. The first iron core is located in the first receiving cavity and connected to the first cover, so that the high voltage busbar and the low voltage busbar arranged circumferentially around the first cylinder can move with the first cylinder.

[0008] The driving unit includes a second cylinder, a second cover, a coil, a spring, and a second iron core. The second cylinder has a second receiving cavity with openings at both ends. The second cover covers the opening of the second receiving cavity away from the second cylinder. The coil is located inside the second receiving cavity and wound around the outer surface of the second iron core. The spring is located between the first cover and the second cylinder. The second iron core is located inside the second receiving cavity and includes a first end and a second end connected to each other. The first end is connected to the second cover, and there is a gap between the second end and the cavity wall of the second receiving cavity.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the outer diameter of the first iron core is smaller than the inner diameter of the second cylinder.

[0010] According to any of the foregoing embodiments of the first aspect of this application, the connecting component includes:

[0011] A connecting body, wherein multiple grooves are formed on the inner wall of the connecting body;

[0012] Multiple first connecting posts are provided in a one-to-one correspondence with multiple wire grooves and are arranged at intervals along the circumference of the connecting body. The multiple first connecting posts are used for electrical connection with the high voltage bus component.

[0013] Multiple second connecting posts are provided in a one-to-one correspondence with multiple wire grooves and are arranged at intervals along the circumference of the connecting body. The multiple second connecting posts are used for electrical connection with the low voltage bus component.

[0014] The first connecting post is located between two adjacent second connecting posts.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the high-voltage bus component includes:

[0016] High-voltage busbar;

[0017] Multiple first protrusions protrude from the lower surface of the high-voltage bus body and are disposed opposite to multiple first connecting posts and can be electrically connected to each of the multiple first connecting posts one by one;

[0018] The first terminal is connected to the high-voltage bus body and is used to electrically connect to the input terminal of the motor.

[0019] According to any of the foregoing embodiments of the first aspect of this application, the low-voltage bus component includes:

[0020] Low voltage busbar;

[0021] Multiple second protrusions protrude from the upper surface of the low-voltage bus body and are disposed opposite to multiple second connecting posts and can be electrically connected to multiple second connecting posts one by one;

[0022] The second terminal is connected to the low-voltage bus body and is used to electrically connect to the input terminal of the motor.

[0023] According to any of the foregoing embodiments of the first aspect of this application, the second cover is provided with a first through hole and a second through hole spaced apart, the first terminal passes through the first through hole and extends out, and the second terminal passes through the second through hole and extends out.

[0024] According to any of the foregoing embodiments of the first aspect of this application, the driving part includes a cylinder, and the cylinder is drivenly connected to the suction part.

[0025] Secondly, this application provides a motor that includes the high-low voltage switching device described in any embodiment of the first aspect of this application.

[0026] Thirdly, this application provides a power device, including the electric motor described in any embodiment of the second aspect of this application.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become apparent to those skilled in the art. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0029] Figure 1 This application shows a schematic diagram of the structure of a high-low voltage switching device provided in some embodiments;

[0030] Figure 2This application shows a cross-sectional structural schematic diagram of a high-low voltage switching device provided in some embodiments;

[0031] Figure 3 This invention provides an exploded structural schematic diagram of a high-low voltage switching device according to some embodiments of the present application.

[0032] Figure 4 Show Figure 3 A schematic diagram of the engaging component in a medium-high-low voltage switching device;

[0033] Figure 5 Show Figure 3 A schematic diagram of the connecting components in a medium-high-low voltage switching device;

[0034] Figure 6 Show Figure 3 A schematic diagram of the high-voltage busbar component in a medium-high-low voltage switching device;

[0035] Figure 7 Show Figure 3 A schematic diagram of the low-voltage busbar component in a medium-high-low voltage switching device.

[0036] The reference numerals in the detailed embodiments are as follows:

[0037] 100 - High / Low Voltage Switching Device;

[0038] 10-Actuating component, 11-Actuating part, 111-First cylinder, 112-First cover, 113-First iron core, 12-Drive part, 121-Second cylinder, 122-Second cover, 123-Coil, 124-Spring, 125-Second iron core;

[0039] 20-High voltage busbar component, 21-High voltage busbar body, 22-First protrusion, 221-First grounding protrusion, 222-First wiring protrusion, 23-First wiring terminal, 231-First U-phase terminal, 232-First V-phase terminal, 233-First W-phase terminal;

[0040] 30-Low voltage bus component, 31-Low voltage bus body, 32-Second protrusion, 321-Second grounding protrusion, 322-Second wiring protrusion, 33-Second wiring terminal, 331-Second U-phase terminal, 332-Second V-phase terminal, 333-Second W-phase terminal;

[0041] 40 - Connecting component, 41 - Connecting body, 42 - First connecting post, 421 - First electrical connection terminal, 422 - Second electrical connection terminal, 43 - Second connecting post, 431 - Third electrical connection terminal, 432 - Fourth electrical connection terminal. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "transverse", "length", "width", "wall thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and other indications of orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] High and low voltage switching device

[0051] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of the structure of a high-low voltage switching device provided in some embodiments of this application is shown. Figure 2 A cross-sectional structural schematic diagram of a high-low voltage switching device provided in some embodiments of this application is shown. Figure 3 An exploded structural schematic diagram of a high-low voltage switching device provided in some embodiments of this application is shown.

[0052] Firstly, such as Figures 1 to 3As shown, this application provides a high-low voltage switching device for a motor. The high-low voltage switching device 100 has a high voltage state and a low voltage state. The high-low voltage switching device 100 includes a pull-in component 10, a high voltage bus component 20, a low voltage bus component 30, and a connecting component 40. The pull-in component 10 includes a pull-in part 11 and a driving part 12 drivenly connected to the pull-in part 11. The driving part 12 is used to drive the pull-in part 11 to engage or disengage with the driving part 12, so that the high-low voltage switching device 100 switches between the high voltage state and the low voltage state. The high voltage bus component 20 is arranged circumferentially around the pull-in part 11 and can move with the pull-in part 11. The low voltage bus component 30 is arranged circumferentially around the pull-in part 11 and can move with the pull-in part 11. The connecting component 40 is fixedly located between the high voltage bus component 20 and the low voltage bus component 30, and the connecting component 40 is used to electrically connect the output terminal of the motor.

[0053] In this application, the high-voltage busbar 20 can electrically connect an external high-voltage power supply to the motor via the connecting member 40, and the low-voltage busbar 30 can also electrically connect an external low-voltage power supply to the motor via the connecting member 40, thereby enabling the motor to operate normally under different voltages. The engaging part 11 is driven to the driving part 12, so that the engaging part 11 can drive the high-voltage busbar 20 and the low-voltage busbar 30 to electrically connect to the connecting member 40, thereby enabling the motor to switch between high and low voltages using a single set of windings. The driving connection mentioned here refers to a connection method capable of transmitting driving force; it can be a direct connection or an indirect connection, as long as it can drive the engaging part 11 to engage or disengage with the driving part 12.

[0054] Furthermore, in the embodiments of this application, there is no specific limitation on the relative positions of the high voltage bus component 20 and the low voltage bus component 30 on the absorbing part 11. The high voltage bus component 20 can be disposed above or below the low voltage bus component 30, as long as the high and low voltage switching can be achieved with the absorbing part 11 closing and opening.

[0055] In the high-low voltage switching device 100 provided in the embodiments of this application, the driving part 12 included in the attracting part 10 can drive the attracting part 11 to engage or disengage with the driving part 12, so that the high-low voltage switching device 100 switches between a high voltage state and a low voltage state. This can drive the high voltage bus part 20 or the low voltage bus part 30 to be electrically connected to the connecting part 40, thereby enabling the motor to have both high voltage and low voltage under one set of windings, thereby avoiding mutual interference between the two sets of windings, reducing the error rate of the motor, and improving its working efficiency.

[0056] In some embodiments of this application, the high-voltage busbar 20 is disposed above the low-voltage busbar 30. When the drive unit 12 and the engaging unit 11 are disconnected, the high-voltage busbar 20 is electrically connected to the connecting member 40, while the low-voltage busbar 30 is not electrically connected to the connecting member 40, thereby causing the motor to output high-voltage torque. When the drive unit 12 and the engaging unit 11 are engaged, the high-voltage busbar 20 is disconnected from the connecting member 40 under the drive of the engaging unit 11, while the low-voltage busbar 30 and the high-voltage busbar 20 move synchronously, and then move upward to be electrically connected to the connecting member 40, thereby realizing the switching from high voltage to low voltage so that the motor outputs low-voltage torque.

[0057] In some other embodiments of this application, the high-voltage bus component 20 is disposed below the low-voltage bus component 30. When the drive unit 12 and the engaging unit 11 are disconnected, the low-voltage bus component 30 is electrically connected to the connecting member 40, while the high-voltage bus component 20 is not electrically connected to the connecting member 40, thereby causing the motor to output low-voltage torque. When the drive unit 12 and the engaging unit 11 are engaged, the low-voltage bus component 30 is disconnected from the connecting member 40 under the drive of the engaging unit 11, while the high-voltage bus component 20 and the low-voltage bus component 30 move synchronously, and then move upward to be electrically connected to the connecting member 40, thereby realizing the switching from low voltage to high voltage so that the motor outputs high-voltage torque.

[0058] Please refer to Figure 4 , Figure 4 Show Figure 3 A schematic diagram of the engaging component in a medium-high-low voltage switching device.

[0059] like Figure 4As shown, in some embodiments of this application, the suction part 11 includes a first cylindrical body 111, a first cover 112, and a first iron core 113. The first cylindrical body 111 has a first receiving cavity with openings at both ends. The first cover 112 is connected to the outer peripheral wall of the first cylindrical body 111. The first iron core 113 is located in the first receiving cavity and is connected to the first cover 112, so that the high voltage bus component 20 and the low voltage bus component 30 arranged circumferentially around the first cylindrical body 111 can move with the first cylindrical body 111. The drive unit 12 includes a second cylinder 121, a second cover 122, a coil 123, a spring 124, and a second iron core 125. The second cylinder 121 has a second receiving cavity with openings at both ends. The second cover 122 covers the opening of the second receiving cavity away from the second cylinder 121. The coil 123 is located in the second receiving cavity and wound around the outer surface of the second iron core 125. The spring 124 is located between the first cover 112 and the second cylinder 121. The second iron core 125 is located in the second receiving cavity and includes a first end and a second end that are connected to each other. The first end is connected to the second cover 122, and there is a gap between the second end and the cavity wall of the second receiving cavity.

[0060] In the embodiments of this application, the shapes of the first cylindrical body 111 and the second cylindrical body 121 can be designed according to the shape of the motor, and are generally square or circular. Furthermore, the embodiments of this application do not specifically limit the diameters of the first cylindrical body 111 and the second cylindrical body 121; that is, the diameter of the first cylindrical body 111 can be larger or smaller than the diameter of the second cylindrical body 121. In some embodiments, the diameter of the first cylindrical body 111 is larger than the diameter of the second cylindrical body 121.

[0061] The first cover 112 and the second cover 122 can be made of conductive metal or insulating material. For example, the conductive metal can be copper, aluminum or other metals, and the insulating material can be plastic or rubber or other materials. This application embodiment does not impose specific limitations here.

[0062] When coil 123 is connected to an external power source, it generates a magnetic field. Under the action of the magnetic field, the first iron core 113 and the second iron core 125 attract each other, thereby causing the high-voltage bus component 20 or the low-voltage bus component 30 to rise and compress the spring 124. When the power is turned off, the magnetic field force disappears, and the first iron core 113 is driven to disconnect from the second iron core 125 under the action of the spring 124.

[0063] In the above embodiments, the switching between high and low voltages can be quickly achieved through the action of the magnetic field and the action of the spring 124, so as to further improve the high and low voltage switching rate of the motor and thus improve the working efficiency of the motor.

[0064] In some embodiments of this application, the outer diameter of the first iron core 113 is smaller than the inner diameter of the second cylinder 121.

[0065] In the above embodiments, the outer diameter of the first iron core 113 is smaller than the inner diameter of the second cylinder 121. This allows the first iron core 113 to be attracted to the second iron core 125 inside the second cylinder 121 under the action of the magnetic field, thereby reducing external interference and further accelerating the switching between high and low voltages.

[0066] Please refer to Figure 5 , Figure 5 Show Figure 3 A schematic diagram of the connecting components in a medium-high-low voltage switching device.

[0067] like Figure 5 As shown, in some embodiments of this application, the connecting component 40 includes a connecting body 41, a plurality of first connecting posts 42, and a plurality of second connecting posts 43. The inner wall of the connecting body 41 has a plurality of wire grooves. The plurality of first connecting posts 42 are arranged in a one-to-one correspondence with the plurality of wire grooves and are spaced apart along the circumference of the connecting body 41. The plurality of first connecting posts 42 are used for electrical connection with the high-voltage busbar component 20. The plurality of second connecting posts 43 are arranged in a one-to-one correspondence with the plurality of wire grooves and are spaced apart along the circumference of the connecting body 41. The plurality of second connecting posts 43 are used for electrical connection with the low-voltage busbar component 30. The first connecting posts 42 are located between two adjacent second connecting posts 43.

[0068] In embodiments of this application, the first connecting post 42 and the second connecting post 43 can be integrally injection molded with the connecting body 41, or they can be manufactured separately. In some embodiments, the connecting body 41 is annular, and the annular connecting body 41 has multiple first through holes and multiple second through holes along its circumference, with the first through holes corresponding to the first connecting post 42 and the second through holes corresponding to the second connecting post 43. It is understood that the first connecting post 42 and the second connecting post 43 are electrical connection terminals. The first connecting post 42 includes a first electrical connection terminal 421 and a second electrical connection terminal 422, wherein the first electrical connection terminal 421 is a grounding terminal. The second connecting post 43 includes a third electrical connection terminal 431 and a fourth electrical connection terminal 432, wherein the third electrical connection terminal 431 is a grounding terminal. Furthermore, both ends of these electrical connection terminals have sockets, and the high-voltage bus component 20 and the low-voltage bus component 30 can be electrically connected to the connecting component 40 by being inserted into the sockets.

[0069] Please refer to Figure 6 , Figure 6 Show Figure 3 A schematic diagram of the high-voltage busbar component in a medium-high-low voltage switching device.

[0070] like Figure 6As shown, in some embodiments of this application, the high-voltage bus component 20 includes a high-voltage bus body 21, a plurality of first protrusions 22, and a first terminal 23. The plurality of first protrusions 22 protrude from the lower surface of the high-voltage bus body 21 and are disposed opposite to and electrically connected to a plurality of first connecting posts 42. The first terminal 23 is connected to the high-voltage bus body 21 and is used to electrically connect to the input terminal of a motor.

[0071] In the above embodiments, the high-voltage bus body 21 can be ring-shaped or square, and the embodiments of this application do not impose specific limitations on this. The first terminal 23 has a first U-phase terminal 231, a first V-phase terminal 232, and a first W-phase terminal 233 that are electrically connected to the input terminal of the motor. The first protrusion 22 includes a first grounding protrusion 221 and a first wiring protrusion 222 that are electrically connected to each other. The first grounding protrusion 221 can be inserted into the socket of the first electrical connection terminal 421, and the first wiring protrusion 222 can be inserted into the socket of the second electrical connection terminal 422, thereby electrically connecting the high-voltage bus component 20 and the connecting component 40.

[0072] Please refer to Figure 7 , Figure 7 Show Figure 3 A schematic diagram of the low-voltage busbar component in a medium-high-low voltage switching device.

[0073] like Figure 7 As shown, in some embodiments of this application, the low-voltage bus component 30 includes a low-voltage bus body 31, a plurality of second protrusions 32, and a second terminal 33. The plurality of second protrusions 32 protrude from the upper surface of the low-voltage bus body 31 and are disposed opposite to and electrically connected to a plurality of second connecting posts 43. The second terminal 33 is connected to the low-voltage bus body 31 and is used to electrically connect to the motor's input terminal.

[0074] In the above embodiments, the low-voltage bus body 31 can be ring-shaped or square, and the embodiments of this application do not impose specific limitations on this. The second terminal 33 has a second U-phase terminal 331, a second V-phase terminal 332, and a second W-phase terminal 333 that are electrically connected to the motor's input terminal. The second protrusion 32 includes a second grounding protrusion 321 and a second wiring protrusion 322 that are electrically connected to each other. The second grounding protrusion 321 can be inserted into the socket of the third electrical connection terminal 431, and the second wiring protrusion 322 can be inserted into the socket of the fourth electrical connection terminal 432, thereby electrically connecting the low-voltage bus component 30 and the connecting component 40.

[0075] In some embodiments of this application, the second cover 122 is provided with a first through hole and a second through hole spaced apart, the first terminal 23 passes through the first through hole and extends out, and the second terminal 33 passes through the second through hole and extends out.

[0076] In the above embodiments, the first through hole and the second through hole of the second cover 122 can help to miniaturize the electrode.

[0077] In some other embodiments of this application, the drive unit 12 includes a cylinder, which is drivenly connected to the suction unit 11. The cylinder can drive the suction unit 11 to move up and down, thereby enabling the electrical connection and disconnection of the high-voltage busbar 20 and the low-voltage busbar 30 with the connecting member 40.

[0078] motor

[0079] Secondly, this application provides a motor including a high-low voltage switching device according to any embodiment of the first aspect of this application.

[0080] Power unit

[0081] Thirdly, this application provides a power device, including the electric motor in any embodiment of the second aspect of this application.

[0082] In this application, the power unit can be a vehicle, an aerospace vehicle, or other similar power unit.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high / low voltage switching device for a motor, characterized in that, The high-low voltage switching device has a high voltage state and a low voltage state, and the high-low voltage switching device includes: A suction component, the suction component including a suction part and a driving part motively connected to the suction part, the driving part being used to drive the suction part to engage or disengage with the driving part, so that the high-low voltage switching device switches between the high voltage state and the low voltage state; A high-voltage busbar is arranged circumferentially around the suction part and can move with the suction part; A low-voltage bus component is arranged circumferentially around the suction part and can move with the suction part; A connecting component is fixedly located between the high-voltage busbar and the low-voltage busbar, and the connecting component is used to electrically connect the output terminal of the motor.

2. The high / low voltage switching device according to claim 1, characterized in that, The suction part includes a first cylinder, a first cover and a first iron core. The first cylinder has a first receiving cavity with openings at both ends. The first cover is connected to the outer peripheral wall of the first cylinder. The first iron core is located in the first receiving cavity and is connected to the first cover, so that the high voltage bus component and the low voltage bus component arranged circumferentially around the first cylinder can move with the first cylinder. The driving unit includes a second cylinder, a second cover, a coil, a spring, and a second iron core. The second cylinder has a second receiving cavity with openings at both ends. The second cover covers the opening of the second receiving cavity away from the second cylinder. The coil is located inside the second receiving cavity and wound around the outer surface of the second iron core. The spring is located between the first cover and the second cylinder. The second iron core is located inside the second receiving cavity and includes a first end and a second end connected to each other. The first end is connected to the second cover, and there is a gap between the second end and the cavity wall of the second receiving cavity.

3. The high / low voltage switching device according to claim 2, characterized in that, The outer diameter of the first iron core is smaller than the inner diameter of the second cylinder.

4. The high / low voltage switching device according to claim 2, characterized in that, The connecting component includes: A connecting body, wherein multiple grooves are formed on the inner wall of the connecting body; Multiple first connecting posts are provided in a one-to-one correspondence with multiple wire grooves and are arranged at intervals along the circumference of the connecting body. The multiple first connecting posts are used for electrical connection with the high voltage bus component. Multiple second connecting posts are provided in a one-to-one correspondence with multiple wire grooves and are arranged at intervals along the circumference of the connecting body. The multiple second connecting posts are used for electrical connection with the low voltage bus component. The first connecting post is located between two adjacent second connecting posts.

5. The high / low voltage switching device according to claim 4, characterized in that, The high-voltage bus component includes: High-voltage busbar; Multiple first protrusions protrude from the lower surface of the high-voltage bus body and are disposed opposite to multiple first connecting posts and can be electrically connected to each of the multiple first connecting posts one by one; The first terminal is connected to the high-voltage bus body and is used to electrically connect to the input terminal of the motor.

6. The high / low voltage switching device according to claim 4, characterized in that, The low-voltage bus component includes: Low voltage busbar; Multiple second protrusions protrude from the upper surface of the low-voltage bus body and are disposed opposite to multiple second connecting posts and can be electrically connected to multiple second connecting posts one by one; The second terminal is connected to the low-voltage bus body and is used to electrically connect to the input terminal of the motor.

7. The high / low voltage switching device according to claim 5 or 6, characterized in that, The second cover is provided with a first through hole and a second through hole spaced apart. A first terminal passes through the first through hole and extends out, and a second terminal passes through the second through hole and extends out.

8. The high / low voltage switching device according to claim 1, characterized in that, The driving unit includes a cylinder, which is drivenly connected to the suction unit.

9. An electric motor, characterized in that, Includes the high-low voltage switching device according to any one of claims 1-8.

10. A power unit, characterized in that, Includes the motor described in claim 9.

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