WO2024044988A1

WO2024044988A1 - Electric motor and drive system having electric motor

Info

Publication number: WO2024044988A1
Application number: PCT/CN2022/115960
Authority: WO
Inventors: 潘继成; 童高强; 郭建国; 梁源宏; 刘学选
Original assignee: 广东德昌电机有限公司
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2024-03-07

Abstract

Disclosed are an electric motor and a drive system. The electric motor comprises: a first housing, which defines a first accommodation cavity, the first housing being provided with a first hole; a stator, which is arranged in the first accommodation cavity; a rotor, which is arranged in the first accommodation cavity and located in the stator, the rotor comprising a first end portion, the first end portion passing through the first housing and being used for outputting torque to the outside, and the first hole being arranged in a wall portion of the first housing near one side of the first end portion; and a circuit board, which is arranged in the first accommodation cavity, the circuit board being arranged on one side of the rotor facing away from the first end portion, wherein the rotor is provided with a flow guide structure arranged in the first accommodation cavity, and the flow guide structure is configured to be capable of driving, when the flow guide structure rotates with the rotation of the rotor, first fluid entering the first accommodation cavity via the first hole, so as to cause the first fluid to flow to a position where same is in contact with the circuit board. In the present application, the first fluid is capable of cooling a circuit board, which can extend the service life of the circuit board, and further enhance the safety of the circuit board.

Description

Motors and drive systems with motors

Technical field

Embodiments of the present application relate to the electromechanical field, and in particular, to a motor and a drive system having the motor.

Background technique

Motors are common driving equipment. The motor includes a casing, a stator, a rotor and a circuit board. The stator, rotor and circuit board are all arranged in the housing, and the rotor can rotate relative to the stator to transmit power to the outside world. The circuit board is at least used to control the rotation of the rotor. The operating temperature of the circuit board of the existing motor is too high, making it difficult to effectively cool down.

technical problem

This application provides a motor and a drive system with the motor, which can reduce the temperature of the circuit board in the motor.

Technical solutions

In order to solve the above technical problems, the first aspect of this application provides a motor, including:

A first shell defines a first accommodation cavity, and the first shell is provided with a first hole;

A stator, located in the first accommodation cavity;

A rotor is provided in the first accommodation cavity and located in the stator. The rotor includes a first end that passes through the first shell and is used to output torque to the outside world. The first hole is provided in the wall portion on one side of the first shell close to the first end;

A circuit board is provided in the first accommodation cavity, and the circuit board is located on a side of the rotor away from the first end;

Wherein, the rotor is provided with a flow guide structure located in the first accommodation cavity, and the flow guide structure is configured to drive the first hole into the first hole when rotating with the rotation of the rotor. The first fluid in the accommodation cavity is allowed to flow to a position in contact with the circuit board.

The second aspect of this application also provides a driving system, including:

Motors of any of the above;

The pump includes a second shell, the second shell defines a second accommodation chamber, the second shell is provided with a fluid inlet and a fluid outlet respectively connected with the second accommodation chamber, the pump is connected to the first end, and is used to extract the fluid from the second accommodation chamber. After the one end obtains the driving force, the supply fluid is sucked in through the fluid inlet and then led out of the second accommodation chamber through the fluid outlet.

The third aspect of this application also provides a driving system, including a motor and a pump;

Motor includes:

The first shell defines a first accommodation cavity, the first shell includes an end wall, and the end wall is provided with a first hole;

The rotor is located in the first accommodation cavity, the rotor includes a first end that passes through the end wall; and,

Temperature sensor, located in the first accommodation cavity,

Wherein, the rotor is provided with a flow guide structure located in the first accommodating cavity, and the flow guide structure is configured to drive the first fluid entering the first accommodating cavity from the first hole when rotating with the rotation of the rotor, so that the first fluid flows into the first accommodating cavity. The fluid flows to the point of contact with the temperature sensor;

The pump is connected to the first end, and the pump is configured to absorb the first fluid and export the first fluid after obtaining the driving force from the first end. The drive system is configured to enable a portion of the first fluid to flow to the first fluid before entering the pump. hole.

beneficial effects

In the motor provided by the embodiment of the present application, a first hole is opened in the first shell, so that the first fluid can enter the first shell through the first hole. The motor also includes a circuit board, which is at least used to drive the rotation of the rotor. The rotor is provided with a flow guide structure located in the first shell. When the rotor rotates, the flow guide structure can drive the first fluid entering the first shell from the first hole to flow in the direction of the circuit board, and Eventually it flows to a point where it can make contact with the circuit board. After the first fluid contacts the circuit board, it can absorb the heat on the circuit board, thereby cooling the circuit board, extending the service life of the circuit board, and improving the safety performance of the circuit board.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application.

Figure 1 is a full cross-sectional schematic diagram of a motor provided by an embodiment of the present application;

Figure 2 is a schematic bottom view of a motor provided by an embodiment of the present application;

Figure 3 is a three-dimensional schematic diagram of a rotor provided by an embodiment of the present application;

Figure 4 is an exploded schematic diagram of a rotor provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of a motor provided by an embodiment of the present application;

Figure 6 is a full cross-sectional schematic diagram of a driving system provided by an embodiment of the present application;

7 is a schematic perspective view of a full cross-sectional view of a driving system provided by an embodiment of the present application;

Figure 8 is a schematic perspective view of a full cross-sectional view of a driving system provided by an embodiment of the present application from a second perspective;

Figure 9 is an exploded schematic diagram of a driving system provided by an embodiment of the present application;

Figure 10 is a schematic bottom view of a driving system provided by an embodiment of the present application.

Reference signs: 10. Device; 100. Motor; 110. First shell; 111. End wall; 112. First hole; 113. Second hole; 120. Rotor; 121. Rotating shaft; 1211. First end; 1212. Second end; 122. Rotor core; 123. Guide channel; 123a, first guide channel; 123b, second guide channel; 1231, first port; 1232, second port; 130, stator ; 140. Circuit board; 141. Temperature sensor; 150. First accommodation chamber; 160. Return channel; 200. Pump; 210. Second shell; 211. Pump shell; 212. End cover; 213. Fluid inlet; 214 , fluid outlet; 215, first flow channel; 216, second flow channel; 220, first gear; 230, second gear; 240, second accommodation cavity.

Embodiments of the invention

In order to facilitate understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "secured" to another element, it can be directly on the other element, or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements present therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by a person skilled in the technical field belonging to this application. The terms used in the description of this application are only for the purpose of describing specific embodiments and are not used to limit this application. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In view of this, referring to FIGS. 1-5 , this embodiment provides a motor 100 , which includes a first shell 110 , a rotor 120 , a stator 130 and a circuit board 140 .

Referring to FIGS. 1 and 3 , the first housing 110 defines a first accommodation cavity 150 , and the rotor 120 , the stator 130 and the circuit board 140 are all disposed in the first accommodation cavity 150 . The first shell 110 is provided with a first hole 112 through which the first fluid can enter the first receiving cavity 150 of the first shell 110 . The first fluid may be a gas, a liquid, or a combination of both. In this embodiment, the first fluid is a liquid.

In this embodiment, the rotor 120 is disposed inside the stator 130 , the stator 130 is fixed in position relative to the first shell 110 , and the rotor 120 can rotate relative to the stator 130 . The rotor 120 includes a first end 1211 and a second end 1212 that are relatively distributed along the axial direction of the motor 100 . The first end 1211 of the rotor 120 passes through the first housing 110 and is used to output torque to the outside world. An external device (such as the pump 200 ) can obtain driving force by being connected to the first end 1211 of the rotor 120 .

In this embodiment, the rotor 120 may specifically include a rotating shaft 121 and a rotor core 122. The rotating shaft 121 is inserted into the rotor core 122. The rotating shaft 121 includes the aforementioned first end 1211 and the second end 1212. Only the first end 1211 of the rotating shaft 121 may pass through the first shell 110 , or both the first end 1211 and the second end 1212 may pass through the first shell 110 . In this embodiment, only the first end 1211 of the rotating shaft 121 passes through the first shell 110 , and the second end 1212 of the rotating shaft 121 is located in the first shell 110 .

In this embodiment, the first hole 112 on the first shell 110 is provided on a wall of the first shell 110 close to the first end 1211 (relative to the second end 1212). In other words, the first hole 112 is arranged closer to the first end 1211 , and the distance between the first hole 112 and the first end 1211 is smaller than the distance between the first hole 112 and the second end 1212 .

The circuit board 140 is electrically connected to the stator 130 , and the circuit board 140 controls the rotation of the rotor 120 by controlling the current flowing through the windings of the stator 130 . The circuit board 140 can be disposed at any position in the first accommodation cavity 150 according to actual needs. In this embodiment, referring to FIG. 1 , the circuit board 140 is disposed on the side of the rotor 120 away from the first end 1211. Specifically, The circuit board 140 is disposed adjacent to one side of the second end 1212 of the rotor 120 . In other embodiments, the second end 1212 of the rotor 120 may also pass through the circuit board 140 .

In particular, the rotor 120 is provided with a flow guide structure located in the first accommodation cavity 150 , and the rotor 120 forms the flow guide structure. When the flow guide structure is configured to rotate with the rotation of the rotor 120, it can drive the first fluid entering the first accommodation cavity 150 from the first hole 112, so that the first fluid flows to a position in contact with the circuit board 140. In other words, when the rotor 120 rotates, the flow guide structure also rotates, and the rotation of the flow guide structure can generate a driving force to drive the first fluid, so that the first fluid flows in a direction close to the circuit board 140 until it contacts the circuit board 140 . The first fluid in contact with the circuit board 140 can exchange heat with the circuit board 140, thereby taking away the heat on the circuit board 140.

The air guide structure can be a solid structure (for example, the air guide structure can be a fan blade fixed on the rotating shaft 121 or a fan blade capable of linking with the rotating shaft 121), or it can be a virtual structure such as a hole or a slot. In this embodiment, the flow guide structure is a channel provided on the rotor 120 (specifically, it may be the flow guide channel 123 below). When the rotor 120 rotates, the channel serving as the flow guide structure also rotates. The rotation of the channel can drive the first fluid located in the channel to flow, thereby generating a driving force for the first fluid.

In the motor 100 provided in this embodiment, a first hole 112 is opened in the first shell 110 so that the first fluid can enter the first shell 110 through the first hole 112 . The motor 100 also includes a circuit board 140 , which is at least used to drive the rotation of the rotor 120 . The rotor 120 is provided with a flow guide structure located in the first shell 110. When the rotor 120 rotates, the flow guide structure can drive the first fluid entering the first shell 110 from the first hole 112 toward the circuit board 140 during the rotation. direction, and finally flows to a position where it can contact the circuit board 140 . After the first fluid contacts the circuit board 140, it can absorb the heat on the circuit board 140, thereby cooling the circuit board 140, extending the service life of the circuit board 140, and improving the safety performance of the circuit board 140.

When the circuit board 140 is disposed on the side where the second end 1212 of the rotor 120 is located, the circuit board 140 and the first hole 112 are respectively located on opposite sides of the rotor 120 . In order to enable the first fluid to smoothly reach a position in contact with the circuit board 140, in this embodiment, referring to FIGS. 1, 3 and 4, the rotor 120 is provided with a flow guide channel 123 along the axis of the rotor 120. To penetrate the rotor 120. The flow guide channel 123 is used for the first fluid entering the first receiving cavity 150 from the first hole 112 to pass through and reach a position in contact with the circuit board 140 . That is, the first fluid located close to the first end 1211 can pass through the flow guide channel 123 of the rotor 120 to reach a position far away from the first end 1211 , thereby achieving the purpose of contacting the circuit board 140 . The provision of the flow guide channel 123 makes the flow of the first fluid smoother and increases the flow rate of the first fluid in contact with the circuit board 140 . In other embodiments, the first fluid may also pass through the gap between the rotor 120 and the stator 130 to achieve the purpose of passing through the rotor 120 and contacting the circuit board 140 .

The specific structure of the flow guide channel 123 depends on the requirements, as long as it can conduct the first fluid on both sides of the rotor 120 . In this embodiment, specifically, the flow guide structure includes a flow guide channel 123 . In other words, the flow guide channel 123 in this embodiment is used both to conduct the first fluid on both sides of the rotor 120 and to drive the first fluid when the rotor 120 rotates. Specifically, referring to FIG. 4 , the flow guide channel 123 has a first port 1231 located close to the first end 1211 and a second port 1232 away from the first end 1211 . Viewed along the axial direction of the motor 100 , the first port 1231 Offset from the second port 1232 , the flow guide channel 123 is configured such that when the rotor 120 rotates, the wall of the flow guide channel 123 can give pressure to the first fluid to flow in a direction close to the circuit board 140 . In this embodiment, the flow guide channel 123 has a simple structure, easy processing, and low cost. In other embodiments, the motor 100 may additionally be provided with other flow guide structures to drive the first fluid (such as fan blades connected to the rotating shaft 121 of the rotor 120 ), so that the flow guide channel 123 is only used to conduct flow on both sides of the rotor 120 . First fluid. At this time, the axis of the flow guide channel 123 may be arranged parallel to the rotation axis of the rotor 120 .

In this embodiment, the axis of the flow guide channel 123 may extend along a straight line, and the axis of the flow guide channel 123 is inclined relative to the rotation axis. The obliquely extending wall portion of the flow guide channel 123 can generate a driving force to guide the first fluid to the circuit board 140 . Preferably, the axis of the flow guide channel 123 is inclined in the circumferential direction of the rotor 120.

Specifically, the flow guide channel 123 may satisfy at least one of the following conditions a)-c): a), the flow guide channel 123 is provided on the rotor core 122; b), the flow guide channel 123 is provided on the rotating shaft 121; c ), the outer peripheral wall of the rotating shaft 121 is provided with a first groove, and the inner peripheral wall of the rotor core 122 is provided with a second groove. The first groove and the second groove together define a flow guide channel 123. In other words, in a), the flow guide channel 123 can be completely disposed on the rotor core 122. At this time, the flow guide channel 123 can be disposed inside the rotor core 122 or on the outer peripheral wall of the rotor core 122. , or may be provided on the inner peripheral wall of the rotor core 122 . In b), the flow guide channel 123 can be completely disposed on the rotating shaft 121. At this time, the flow guide channel 123 can be located inside the rotating shaft 121, or the flow guide channel 123 can also be located on the outer peripheral wall of the rotating shaft 121 (the flow guide channel 123 is exposed on the outer peripheral wall of the rotating shaft 121). In c), part of the guide channel 123 can also be provided on the rotating shaft 121 and part on the rotor core 122. The first groove on the rotating shaft 121 and the second groove on the rotor core 122 are combined to form a guide channel. 123.

Specifically, in this embodiment, referring to FIG. 3 and FIG. 4 , the flow guide channel 123 includes a first flow guide channel 123 a and a second flow guide channel 123 b. The first flow guide channel 123 a is completely provided on the rotating shaft 121 and is located on the rotating shaft. The outer peripheral wall of 121, the inner peripheral wall of the rotating shaft 121 and the rotor core 122 jointly define a first flow guide channel 123a. The second flow guide channel 123b is completely provided on the rotor core 122. Specifically in this embodiment, the second flow guide channel 123b is provided inside the rotating shaft 121, and the second flow guide channel 123b penetrates the top surface and the bottom surface of the rotor core 122. The axes of the two types of flow guide channels (123a, 123b) extend along straight lines and are inclined relative to the rotation axis of the rotor 120. By arranging two types of flow guide channels (123a, 123b) at different distances from the rotation axis of the rotor 120, the first fluid can be efficiently conducted at different positions of the rotor 120 from the rotation axis, so that for The conduction effect of the first fluid is better.

In this embodiment, the rotor 120 is provided with three first flow guide channels 123a, and the three first flow guide channels 123a are evenly arranged around the rotation axis of the rotor 120. The rotor 120 is also provided with four second flow guide channels 123b, and the four second flow guide channels 123b are evenly arranged around the rotation axis of the rotor 120. By evenly arranging a plurality of first flow guide channels 123a and second flow guide channels 123b, on the one hand, the flow rate of the first fluid can be increased, and on the other hand, the first fluid can also flow more evenly to the rotor 120 away from the first fluid. One side of the end 1211 makes the heat exchange between the circuit board 140 and the first fluid more uniform, and the heat exchange effect of the circuit board 140 is better.

In this embodiment, the stator 130 and the first shell 110 jointly define a return channel 160 , and the return channel 160 is used to allow the first fluid located on the side away from the first end 1211 to return to the side close to the first end 1211 . That is, after the first fluid passes through the guide channel 123 and reaches the side of the rotor 120 away from the first end 1211, it can flow back to the side of the rotor 120 close to the first end 1211 through the return channel 160, so that the first fluid can Forming a loop within the motor 100 improves the heat exchange effect of the first fluid. In other embodiments, the first fluid can also flow back to the side of the rotor 120 near the first end 1211 through other additional channels, or can also flow back to the side near the first end 1211 through the gap between the rotor 120 and the stator 130 . side, which will not be described in detail here.

Referring to FIGS. 1-2 , in this embodiment, a second hole 113 is provided on the wall of the first shell 110 near the first end 1211 , and the second hole 113 is used to lead out the first fluid in the first accommodation chamber 150 . That is, after the first fluid enters the first receiving cavity 150 through the first hole 112, it flows from the position on the side of the rotor 120 close to the first end 1211 to the position on the side of the rotor 120 away from the first end 1211. After a fluid exchanges heat with the circuit board 140 , it can flow back through the return channel 160 to a position near the first end 1211 of the rotor 120 , and then be led out of the first accommodation cavity 150 through the second hole 113 . This solution enables the first fluid to take the heat generated by the circuit board 140 away from the first accommodation cavity 150 of the motor 100, thereby further improving the heat dissipation effect of the circuit board 140. In other embodiments, the first fluid can also self-circulate in the first accommodation chamber 150 .

In this embodiment, referring to FIG. 2 , the first shell 110 includes an end wall 111 located at one axial end thereof, the first end 1211 passes through the end wall 111 , and the first hole 112 and the second hole 113 are both provided in the end wall 111 . This solution enables the first fluid to be introduced or exported into the first accommodation chamber 150 in substantially the same direction, making the introduction or export of the first fluid more convenient. In other embodiments, the first hole 112 and the second hole 113 can also be provided on different wall portions of the first shell 110, which will not be described again here.

In this embodiment, the circuit board 140 includes a temperature sensor 141. The temperature sensor 141 is disposed at a position of the circuit board 140 that can contact the first fluid. The temperature sensor 141 is used to sense the temperature of the first fluid. In this solution, by sensing the temperature of the first fluid, the parameters of the first fluid can be adjusted accordingly. For example, the flow rate of the first fluid or the temperature of the first fluid entering the first accommodation chamber 150 from the first hole 112 can be adjusted. , thereby further improving the heat dissipation effect of the circuit board 140. For example, when the first temperature sensor 141 senses that the temperature of the first fluid is too high, the temperature of the first fluid entering the first accommodation chamber 150 through the first hole 112 can be intelligently reduced. Other effects of sensing the temperature of the first fluid are also described below, see below.

The temperature sensor 141 only needs to be disposed at a position on the circuit board 140 that can be in contact with the first fluid. In this embodiment, referring to FIG. 5 , the temperature sensor 141 is disposed on the wall of the circuit board 140 facing the first hole 112 . This solution allows the first fluid to directly contact the temperature sensor 141 after passing through the flow guide channel 123, which makes the sensing of the temperature sensor 141 more convenient. In other embodiments, the temperature sensor 141 can also be disposed on the side of the circuit board 140 away from the rotor 120 , which will not be described again here.

Referring to FIG. 5 , in this embodiment, the motor 100 is provided with a channel that enables the first fluid to flow to a side of the circuit board 140 away from the first hole 112 , so that the first fluid can flow to a side of the circuit board 140 away from the first hole 112 . 112 wall contact. In this way, the entire circuit board 140 can exchange heat with the first fluid, and the heat dissipation effect of the circuit board 140 is better. Specifically, the first fluid may flow from the gap between the circuit board 140 and the first shell 110 to the side of the circuit board 140 facing away from the rotor 120 . In other embodiments, holes may be made in the circuit board 140 to facilitate the flow of the first fluid to the side away from the rotor 120 , which will not be described again here.

Referring to Figures 6-10, this application also provides a driving system 10, which includes the motor 100 in any of the above embodiments. In particular, the drive system 10 also includes a pump 200 . The pump 200 includes a second housing 210 that defines a second accommodation chamber 240. The second housing 210 is provided with a fluid inlet 213 and a fluid outlet 214 respectively communicated with the second accommodation chamber 240. The pump 200 is connected to the first end 1211 of the rotor 120 of the motor 100 and is used to suck the supply fluid through the fluid inlet 213 after obtaining the driving force from the first end 1211. The drive system 10 is configured to enable the fluid flowing through the fluid inlet 213 to The supply fluid is divided into a first fluid and a second fluid. The second fluid flows into the second accommodation chamber 240 and is then led out of the second accommodation chamber 240 through the fluid outlet 214 . That is, the pump 200 can obtain the power of the motor 100 to drive the second fluid to flow.

The second fluid may be of the same material as the first fluid or may be different. When the first fluid and the second fluid are of the same material, the first fluid and the second fluid may be stored in the same tank, or they may be stored in two different tanks. In the oil tank, when the first fluid and the second fluid are respectively stored in different oil tanks, the annular passage of the first fluid and the annular passage of the second fluid are isolated from each other. In this embodiment, the first fluid and the second fluid are made of the same material. And the first fluid and the second fluid are stored in the same oil tank, that is, the annular passage of the first fluid and the annular passage of the second fluid are connected.

In this embodiment, the second shell 210 is at least partially integrally connected with the first shell 110 . In this solution, on the one hand, the connection between the first shell 110 and the second shell 210 is made more stable, and on the other hand, the processing steps can be reduced and the processing cost can be reduced. In other embodiments, the first housing 110 can also be arranged independently from the second housing 210 , that is, the motor 100 and the pump 200 are connected only through the first end 1211 of the rotor 120 .

Specifically, the second housing 210 and the end wall 111 jointly define the second accommodating cavity 240. In this way, on the one hand, the distance between the motor 100 and the pump 200 can be reduced, thereby shortening the length of the rotating shaft 121 of the rotor 120; on the other hand, , since the second housing 210 can reduce one wall portion used to define the second accommodation cavity 240, the number of parts of the second housing 210 can be reduced, and the material cost of the driving system 10 can be reduced.

Referring to FIG. 6 , in this embodiment, the second shell 210 also defines a first flow channel 215 . The first flow channel 215 is isolated from the second accommodation cavity 240 , and the first flow channel 215 is in communication with the first hole 112 . A part of the fluid inlet 213 is connected to the second accommodation chamber 240 and a part is connected to the first flow channel 215 . The supply fluid flows in through the fluid inlet 213, and the driving system 10 is configured to split the supply fluid flowing through the fluid inlet 213 into a first fluid and a second fluid. The first fluid is directed to the first hole 112 through the first flow channel 215, and the second fluid Guide to the second accommodation cavity 240. In other words, the supply fluid is divided at the fluid inlet 213 , part of it is guided through the first flow channel 215 to the first hole 112 and enters the first accommodation chamber 150 in the motor 100 , and part of it enters the second accommodation chamber 240 of the pump 200 .

It should be noted that in this embodiment, the first fluid and the second fluid are both stored in one oil tank. Their materials are exactly the same and both are supply liquids. The difference in nomenclature is only used to distinguish the different arrangement locations of the fluids. That is, the fluid arranged at a position from the oil tank to the drive system 10 is the supply fluid, the supply fluid branched into the pump 200 is the second fluid, and the supply fluid branched into the motor 100 is the first fluid.

In this embodiment, since the second shell 210 is used to define the first flow channel 215 connected to the first hole 112, on the one hand, there is no need to arrange additional bifurcated pipes to connect the fluid inlet 213 and the first hole 112, which can save flow splitting. pipeline. On the other hand, since the temperature of the first fluid branched into the motor 100 can be sensed by the temperature sensor 141, and the first fluid passes through the guide channel 123 on the rotor 120 and contacts the temperature sensor 141, the first fluid The temperature is substantially not affected by the temperature of the stator 130 of the motor 100 , so that the temperature of the first fluid in contact with the temperature sensor 141 can substantially reflect the temperature of the second fluid entering the pump 200 . Therefore, this embodiment can correspondingly adjust the parameters of the pump 200 according to the temperature sensed by the temperature sensor 141 . For example, when the pump 200 is a cooling pump and the temperature sensed by the temperature sensor 141 is too high, it proves that the temperature of the second fluid entering the pump 200 is too high. The rotation speed of the pump 200 can be appropriately increased to accelerate the flow of oil in the tank. , and cooled by an external radiator circuit. When the temperature exceeds the limit value, the temperature sensor 141 feeds back to the controller, and the controller can perform derating protection according to actual needs.

Referring to Figures 8-9, in this embodiment, the second shell 210 also defines a second flow channel 216. The second flow channel 216, the first flow channel 215 and the second accommodation cavity 240 are all Isolated, one end of the second flow channel 216 is connected to the second hole 113 , and the other end is connected to the fluid outlet 214 . The first fluid in the first receiving cavity 150 can flow out of the driving system 10 through the second flow channel 216 and the fluid outlet 214 . In this solution, since only the fluid outlet 214 of the entire drive system 10 can export fluid, the external openings of the entire drive system 10 can be reduced, and the drive system 10 only needs a single pipe to export all internal fluids.

In other embodiments, the second hole 113 may also be connected to the second accommodating cavity 240 so that the first fluid exported from the second hole 113 can be exported to the driving system 10 via the second accommodating cavity 240 and the fluid outlet 214 . In this solution, not only can the number of external openings of the entire driving system 10 be reduced, but the pump 200 can also provide the power for the first fluid to flow out of the first accommodation chamber 150, thereby improving the fluidity of the first fluid. Specifically, the second accommodation chamber 240 has a negative pressure area connected to the fluid inlet 213 and a positive pressure area connected to the fluid outlet 214, and the second hole 113 is connected to the negative pressure area. That is, the pump 200 can suck the first fluid in the first accommodation chamber 150 through the second hole 113 into the second accommodation chamber 240 , and then discharge the first fluid through the fluid outlet 214 .

The pump 200 may be a rotor pump. Refer to Figures 8-9. In this embodiment, the first end 1211 of the rotor 120 is connected to the first gear 220. The first gear 220 obtains the driving force from the first end 1211 of the rotor 120. Rotates relative to the second gear 230, thereby generating power to drive the second fluid.

Specifically, referring to Figures 7-9, in this embodiment, the second housing 210 includes a pump housing 211 and an end cover 212. The pump housing 211 is integrally formed with the first housing 110, and the end cover 212 is connected to the end of the pump housing 211 facing away from the motor 100. On one side, the fluid inlet 213 and the fluid outlet 214 are provided on the end cover 212 . That is, in this embodiment, the first shell 110 includes an end wall 111, the first end 1211 passes through the end wall 111, the first hole 112 is provided in the end wall 111, one end of the pump shell 211 is connected to the end wall 111, and the other end is connected to the end wall 111. The cover 212 , the end wall 111 , the first gear 220 , the second gear 230 and the end cover 212 jointly define a second accommodation cavity 240 . The pump housing 211 is arranged around the outer circumference of the second gear 230 . The pump housing 211 , the second gear 230 , the end wall 111 and the end cover 212 jointly define a first flow channel 215 and a second flow channel 216 . One end of the first flow channel 215 is connected to the fluid inlet 213 , and the other end is connected to the first hole 112 . One end of the second flow channel 216 is connected to the fluid outlet 214 and the other end is connected to the second hole 113 .

This application also provides a driving system 10 , which includes a motor 100 and a pump 200 . The motor 100 includes a first housing 110, a stator 130, a rotor 120 and a circuit board 140. The first shell 110 defines a first receiving cavity 150. The first shell 110 includes an end wall 111, and the end wall 111 is provided with a first hole 112. The rotor 120 is disposed in the first receiving cavity 150 , and the rotor 120 includes a first end 1211 passing through the end wall 111 . The circuit board 140 is disposed in the first accommodation cavity 150 . The circuit board 140 is at least used to control the rotation of the rotor 120 . The circuit board 140 includes a temperature sensor 141 . The rotor 120 is provided with a flow guide structure located in the first accommodating cavity 150. The flow guide structure is configured to drive the first fluid entering the first accommodating cavity 150 from the first hole 112 when rotating with the rotation of the rotor 120. , so that the first fluid flows to a position in contact with the temperature sensor 141 . The pump 200 is connected to the first end 1211. The pump 200 is configured to absorb the first fluid and export the first fluid after obtaining the driving force from the first end 1211 of the rotor 120. The driving system 10 is configured to make the first fluid A portion flows to the first hole 112 before entering the pump 200 . In this embodiment, the temperature sensed by the temperature sensor 141 in the motor 100 can basically reflect the temperature of the fluid flowing into the pump 200. Therefore, the parameters of the pump 200 can be adjusted based on the temperature sensed by the temperature sensor 141 in the pump 200. Adjustment improves the intelligence of the drive system 10.

It should be noted that the preferred embodiments of the present application are given in the description and drawings of this application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not used as additional limitations on the content of the present application, and are provided for the purpose of making the disclosure of the present application more thorough and comprehensive. Moreover, the above technical features can be continuously combined with each other to form various embodiments not listed above, which are all deemed to be within the scope of the description of this application; further, for those of ordinary skill in the art, they can be improved or transformed according to the above description. , and all these improvements and transformations should fall within the protection scope of the claims appended to this application.

Claims

A motor, characterized in that it includes:

A first shell defines a first accommodation cavity, and the first shell is provided with a first hole;

A stator, located in the first accommodation cavity;

A rotor is provided in the first accommodation cavity and located in the stator. The rotor includes a first end that passes through the first shell and is used to output torque to the outside world. The first hole is provided in the wall portion on one side of the first shell close to the first end;

A circuit board is provided in the first accommodation cavity, and the circuit board is located on a side of the rotor away from the first end;

Wherein, the rotor is provided with a flow guide structure located in the first accommodation cavity, and the flow guide structure is configured to drive the first hole into the first hole when rotating with the rotation of the rotor. The first fluid in the accommodation cavity is allowed to flow to a position in contact with the circuit board.
The motor according to claim 1, characterized in that:

The flow guide structure includes a flow guide channel that runs through the rotor along the axial direction of the rotor. The flow guide channel is used to provide access to the first accommodation cavity from the first hole. The first fluid passes through and reaches a position in contact with the circuit board.
The motor according to claim 1, characterized in that:

The flow guide structure includes a flow guide channel, the flow guide channel has a first port located close to the first end, and a second port away from the first end, viewed along the axial direction of the motor. , the first port is offset from the second port, and the flow guide channel is configured such that when the rotor rotates, the wall of the flow guide channel can give the first fluid a direction close to the circuit board. directional flow pressure.
The motor according to claim 2, characterized in that:

The axis of the flow guide channel extends along a straight line, and the axis is inclined relative to the rotation axis.
The motor according to claim 1, characterized in that:

The rotor includes a rotating shaft and a rotor core sleeved outside the rotating shaft. The rotating shaft includes the first end. The flow guide structure includes a flow guide channel, and the flow guide channel satisfies the following conditions a)- At least one of c):

a), the diversion channel is provided in the rotor core;

b), the diversion channel is provided on the rotating shaft;

c). The outer peripheral wall of the rotating shaft is provided with a first groove, and the inner peripheral wall of the rotor core is provided with a second groove. The first groove and the second groove jointly define the flow guide channel.
The motor according to claim 1, characterized in that:

The circuit board includes a temperature sensor. The temperature sensor is provided at a position of the circuit board that can contact the first fluid. The temperature sensor is used to sense the temperature of the first fluid; the temperature sensor is configured on the wall of the circuit board facing the first hole.
The motor according to claim 1, characterized in that:

The motor is provided with a channel that enables the first fluid to flow to a side of the circuit board facing away from the first hole, so that the first fluid can flow to a side of the circuit board facing away from the first hole. hole wall contact;

A second hole is provided on the wall of the first shell near the first end, and the second hole is used to lead out the first fluid in the first accommodation cavity;

The first shell includes an end wall, the first end passes through the end wall, and the first hole and the second hole are both provided in the end wall.
A driving system is characterized by including:

The motor according to any one of claims 1-6;

The pump includes a second shell, the second shell defines a second accommodation cavity, the second shell is provided with a fluid inlet and a fluid outlet respectively connected with the second accommodation cavity, the pump is connected to the second accommodation cavity. The first end is connected, and is used to obtain the driving force from the first end, suck the supply fluid through the fluid inlet, and then lead it out of the second accommodation chamber through the fluid outlet.
The drive system according to claim 8, characterized in that:

The first shell includes an end wall, the first end passes through the end wall, and the first hole is provided in the end wall;

The second shell and the end wall jointly define the second accommodation cavity.
The drive system according to claim 9, characterized in that:

The second shell also defines a first flow channel, the first flow channel is isolated from the second accommodation cavity, and the first flow channel is in communication with the first hole;

A part of the fluid inlet is connected to the second accommodation cavity, and the other part is connected to the first flow channel;

Supply fluid flows in through the fluid inlet, and the drive system is configured to split the supply fluid flowing through the fluid inlet into the first fluid and the second fluid, and the first fluid flows through the fluid inlet. The first flow channel guides the first hole, and the second fluid guides the second accommodation cavity.
The drive system according to claim 10, characterized in that:

A second hole is provided on the wall of the first shell near the first end, and the second hole is used to lead out the first fluid in the first accommodation cavity;

The second shell also defines a second flow channel, which is isolated from the first flow channel and the second accommodation cavity, and one end of the second flow channel is connected to the second hole. , the other end is connected with the fluid outlet.
A driving system is characterized by including a motor and a pump;

The motor includes:

A first shell defines a first accommodation cavity, the first shell includes an end wall, and the end wall is provided with a first hole;

A rotor is provided in the first accommodation cavity, the rotor includes a first end that passes through the end wall; and,

Temperature sensor, located in the first accommodation cavity,

Wherein, the rotor is provided with a flow guide structure located in the first accommodation cavity, and the flow guide structure is configured to drive the first hole into the first hole when rotating with the rotation of the rotor. accommodating a first fluid in the cavity such that the first fluid flows to a position in contact with the temperature sensor;

The pump is connected to the first end, the pump is configured to absorb the first fluid and export the first fluid after obtaining the driving force from the first end, and the drive system is configured to be able to A portion of the first fluid is allowed to flow toward the first hole before entering the pump.