Motor rotating shaft structure, motor and vehicle

Abstract

The utility model provides a motor rotating shaft structure, a motor and a vehicle. The motor rotating shaft structure comprises a rotating shaft body and a flow adjusting part. The rotating shaft body is provided with a cooling channel, an oil outlet and a first mounting hole formed in the radial direction of the rotating shaft body. The flow adjusting part comprises a first sliding block arranged in the first mounting hole in a sliding mode, a first elastic piece arranged between the rotating shaft body and the first sliding block and a second sliding block arranged on the rotating shaft body, the second sliding block is provided with an extending part, the extending part is sleeved with the first sliding block, and a through hole allowing cooling liquid to pass through is formed in the first sliding block; along with different rotating speeds of the rotating shaft body, the first sliding block can be located at a plurality of conduction positions, and the flow areas formed by the flow adjusting part at the conduction positions are different. According to the motor rotating shaft structure provided by the utility model, the flow area formed by the flow adjusting part can be automatically adjusted according to the cooling requirement of the rotating shaft body, so that the cooling efficiency can be improved, and the cooling cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor shaft; it also relates to a motor and a vehicle equipped with the motor. Background Technology

[0002] In existing technologies, the main cooling methods for motor rotors include air cooling and liquid cooling. Liquid cooling typically uses cooling oil or water as the coolant, which is then introduced into the motor shaft and sprayed onto the rotor through nozzles on the shaft. A solenoid valve is usually installed inside the shaft to control the coolant flow rate according to the motor's cooling needs. However, solenoid valves have a relatively complex structure, integrating electromagnetic drive devices, control circuits (in some cases), and other components, requiring more sophisticated manufacturing processes, resulting in higher costs. Utility Model Content

[0003] In view of this, the present invention aims to propose a motor shaft structure to improve cooling efficiency and reduce production costs.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A motor shaft structure includes a shaft body and a flow regulating part disposed on the shaft body;

[0006] The rotating shaft body is provided with a cooling channel arranged along its own axial direction, an oil outlet communicating with the cooling channel, and a first mounting hole arranged radially along the rotating shaft body on one side of the cooling channel.

[0007] The flow regulating unit includes a first slider slidably disposed in the first mounting hole, a first elastic member disposed between the rotating shaft body and the first slider, and a second slider disposed on the rotating shaft body. The second slider has an extension portion extending into the cooling channel, the first slider is sleeved outside the extension portion, and a through hole for coolant to pass through is provided on the first slider.

[0008] Depending on the rotational speed of the shaft body, the first slider can be in multiple conductive positions, and the flow area formed by the flow regulating part is different in each conductive position.

[0009] Furthermore, the conduction position includes a first conduction position, in which the first slider cuts off the cooling channel, and the flow regulating part circulates the coolant through the through hole.

[0010] Furthermore, the conduction position includes a second conduction position. In the second conduction position, the first slider cuts off the cooling channel, the through hole is located in the first mounting hole, and the flow area of ​​the flow regulating part is zero.

[0011] Furthermore, the conduction position includes a third conduction position, in which the through hole is located in the first mounting hole and a flow space is formed between the first slider, the second slider and the rotating shaft body, and the flow regulating part circulates the coolant through the flow space.

[0012] Furthermore, relative to the first mounting hole, the rotating shaft body is provided with a second mounting hole located on the other side of the cooling channel;

[0013] The second slider is slidably disposed in the second mounting hole, and a second elastic element is provided between the second slider and the rotating shaft body. In the first conductive position and the second conductive position, part of the first slider is located in the second mounting hole.

[0014] Furthermore, both the first slider and the second slider are cylindrical;

[0015] The first slider has a first blocking plate at the end opposite to the second slider, and the first elastic element is a first spring disposed between the rotating shaft body and the first blocking plate. Alternatively, the second slider has a second blocking plate at the end opposite to the first slider, and the second elastic element is a second spring disposed between the rotating shaft body and the second blocking plate.

[0016] Furthermore, the oil outlet includes a first oil outlet hole located near the inlet of the cooling channel, and a second oil outlet hole located at the other end of the shaft body.

[0017] The flow regulating part is located on the side of the first oil outlet near the inlet, and the first oil outlet and / or the second oil outlet are a plurality of them arranged at circumferential intervals along the rotating shaft body.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] The motor shaft structure described in this utility model facilitates the cooling of the shaft and its rotor by providing a cooling channel and an oil outlet within the shaft body. Furthermore, the cooperation of a first slider and a first elastic element, slidably disposed within a first mounting hole, allows the first slider to withstand different centrifugal forces at different rotational speeds, enabling it to occupy multiple conductive positions with varying flow areas. This not only ensures adequate cooling for the shaft and its rotor but also prevents excessive coolant usage and waste. Compared to traditional solutions that incorporate solenoid valves, the control unit can be eliminated, thereby reducing production costs.

[0020] Furthermore, in the first open position, the first slider cuts off the cooling channel, and the coolant flows through the through hole of the flow regulating part. This ensures that even when the rotational speed of the shaft body is low, the coolant can still flow into the cooling channel and be sprayed out through the oil outlet for cooling. In the second open position, the through hole is located within the first mounting hole, and the flow area of ​​the flow regulating part is zero. This allows the coolant to circulate continuously for cooling under certain operating conditions, such as when the motor is just starting up or operating at extremely low load, thus avoiding coolant waste. In the third open position, the coolant flows through the flow space between the first slider, the second slider, and the shaft body, increasing the flow area of ​​the flow regulating part and thus meeting the cooling requirements of the shaft body at higher rotational speeds.

[0021] Furthermore, the sliding arrangement of the second slider within the second mounting hole, along with the inclusion of the second elastic element, facilitates improved dynamic balance of the flow regulation unit during shaft rotation. The cylindrical shape of the first and second sliders, along with the arrangement of the blocking plate and spring, positively contributes to improved cooling efficiency and reduced cooling costs by optimizing coolant flow, stabilizing flow regulation, facilitating maintenance, and extending component lifespan. This helps the motor shaft cooling system achieve more economical and efficient operation. The coordination of the first and second oil outlets ensures that the coolant is sprayed directly onto the rotor requiring cooling, thereby improving the cooling effect on the rotor. The arrangement of multiple first and second oil outlets spaced circumferentially along the shaft further enhances the uniformity of coolant spray, thus improving cooling efficiency.

[0022] In addition, another objective of this utility model is to provide an electric motor, including the motor shaft structure described above.

[0023] The motor described in this utility model, by setting the motor shaft structure as described above, helps to improve cooling efficiency and motor performance.

[0024] In addition, this utility model also proposes a vehicle, including the motor and oil cooler as described above, a main oil circuit connected to the oil cooler, and a first oil circuit for connecting the main oil circuit and the cooling channel, wherein the first oil circuit is connected to the inlet of the cooling channel.

[0025] Furthermore, it also includes a second oil passage for connecting the main oil passage and the cooling channel;

[0026] The connection between the second oil passage and the cooling channel is located on the side of the flow regulating section away from the inlet, and a one-way flow section is provided on the second oil passage to limit the one-way flow of coolant oil from the second oil passage to the cooling channel.

[0027] Compared with the prior art, this utility model has the following advantages:

[0028] The vehicle described in this utility model, through the arrangement of the main oil circuit, the first oil circuit, and the aforementioned motor, facilitates the improvement of the motor's performance.

[0029] In addition, by setting up a second oil circuit and a one-way flow section, the flow regulation section on the first oil circuit can be used to cool the rotating shaft, thereby further improving the performance of the motor. Attached Figure Description

[0030] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0031] Figure 1 This is a schematic diagram of the flow regulating unit in the first conducting position according to Embodiment 1 of this utility model;

[0032] Figure 2 This is a schematic diagram of the flow regulating unit in the second conducting position according to Embodiment 1 of this utility model;

[0033] Figure 3 This is a schematic diagram of the flow regulating unit in the third conducting position according to Embodiment 1 of this utility model;

[0034] Figure 4 This is a schematic diagram of the flow regulating unit described in Embodiment 1 of the present invention from one perspective;

[0035] Figure 5 This is a schematic diagram of the flow regulating unit described in Embodiment 1 of this utility model from another perspective;

[0036] Figure 6 This is a schematic diagram of the structure of the first slider described in Embodiment 1 of this utility model;

[0037] Figure 7 This is a schematic diagram of the structure of the second slider according to Embodiment 1 of this utility model;

[0038] Figure 8 This is a schematic diagram of the oil circuit described in Embodiment 3 of this utility model.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Shaft body; 2. First slider; 3. Second slider; 4. Oil pan; 5. Suction filter; 6. Electric pump; 7. Oil cooler; 8. Main oil circuit; 9. Check valve; 10. Flow regulating unit;

[0041] 100. Cooling channel; 101. First elastic element; 102. Second elastic element; 103. First mounting hole; 104. Second mounting hole; 105. Flow space;

[0042] 201. First blocking plate; 202. First through hole; 203. Second through hole;

[0043] 301. Second blocking plate;

[0044] 801, First oil circuit; 802, Second oil circuit. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0046] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not 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 this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0047] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances.

[0048] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0049] Example 1

[0050] This embodiment relates to a motor shaft structure to solve the problem of high production cost in the existing technology of controlling coolant flow through solenoid valves.

[0051] In terms of overall structure, the motor shaft structure described in this embodiment includes a shaft body 1 and a flow regulating part 10 disposed on the shaft body 1. The shaft body 1 is provided with a cooling channel 100 disposed along its own axial direction, an oil outlet communicating with the cooling channel 100, and a first mounting hole 103 disposed radially along the shaft body 1 on one side of the cooling channel 100.

[0052] The flow regulating unit 10 includes a first slider 2 slidably disposed in the first mounting hole 103, a first elastic member 101 disposed between the rotating shaft body 1 and the first slider 2, and a second slider 3 disposed on the rotating shaft body 1. The second slider 3 has an extension portion that extends into the cooling channel 100, and the first slider 2 is sleeved outside the extension portion. The first slider 2 has a through hole for coolant to pass through. Depending on the rotational speed of the rotating shaft body 1, the first slider 2 can be in multiple conductive positions, and the flow area formed by the flow regulating unit 10 is different in each conductive position.

[0053] The motor shaft structure described in this embodiment, by providing a cooling channel 100 and an oil outlet within the shaft body 1, facilitates the cooling of the shaft body 1 and its rotor. Furthermore, through the cooperation of a first slider 2 and a first elastic element 101 slidably disposed within the first mounting hole 103, the first slider 2 experiences different centrifugal forces at different rotational speeds of the shaft body 1, allowing it to occupy multiple conductive positions with varying flow areas. This not only ensures the cooling requirements of the shaft body 1 and its rotor but also avoids excessive use of coolant, thus preventing waste. Compared to traditional solutions that incorporate solenoid valves, the control unit can be eliminated, thereby reducing production costs.

[0054] Based on the above overview, an exemplary structure of the motor shaft structure described in this embodiment is as follows: Figures 1 to 5 As shown in the diagram, the first mounting hole 103 is open at one end facing the cooling channel 100, and sealed at the other end to ensure the effectiveness of the cooling channel 100. The first slider 2 has a first end facing the cooling channel 100 and a second end away from the cooling channel 100.

[0055] The first elastic element 101 is preferably disposed within the first mounting hole 103 and located between the second end and the first mounting hole 103. When the shaft body 1 rotates, the first slider 2, under the action of centrifugal force, overcomes the elastic force of the first elastic element 101 and slides away from the axis of the shaft body 1, compressing the first elastic element 101. When the rotational speed of the shaft body 1 decreases or disappears, the first slider 2 can be reset under the action of the first elastic element 101. In this way, the state of the first slider 2 moves only with the rotational speed of the shaft body 1, thereby realizing purely mechanical control of the amount of coolant flowing out of the oil outlet, thereby achieving cooling of the shaft body 1 and its rotor.

[0056] As a preferred implementation method, such as Figure 1 As shown, a second mounting hole 104 is provided on the shaft body 1 on the other side of the cooling channel 100, relative to the first mounting hole 103. The second slider 3 is slidably disposed within the second mounting hole 104, and a second elastic member 102 is provided between the second slider 3 and the shaft body 1. In the first and second open positions, a portion of the first slider 2 is located within the second mounting hole 104. The slidable second slider 3 within the second mounting hole 104 and the provision of the second elastic member 102 facilitate improved dynamic balance of the flow regulating unit 10 during the rotation of the shaft body 1.

[0057] Specifically, in this embodiment, the cross-sectional area of ​​the second mounting hole 104 is adapted to the cross-sectional area of ​​the first slider 2 so that the first slider 2 can be inserted. For ease of description, the end of the second slider 3 facing the cooling channel 100 is referred to as the third end, and the other end is referred to as the fourth end. The second elastic member 102 is disposed between the fourth end and the inner wall of the second mounting hole 104, and the aforementioned extended portion is specifically located at the third end of the second slider 3.

[0058] When the rotating shaft body 1 rotates, the second slider 3 moves synchronously with the first slider 2. That is, under the action of centrifugal force, the second slider 3 slides away from the axis of the rotating shaft body 1 and compresses the second elastic element 102. When the rotational speed of the rotating shaft body 1 decreases or disappears, the second slider 3 can return to its original position under the action of the second elastic element 102. In this way, the state of the second slider 3 moves only with the rotational speed of the rotating shaft body 1, which helps to improve the dynamic balance of the rotating shaft body 1.

[0059] It should be noted that in this embodiment, the centers of mass of the first slider 2 and the second slider 3 are symmetrically arranged on two opposite sides of the axis of the rotating shaft body 1, and the weights of the first slider 2 and the second slider 3 are equal. This helps to further ensure the sliding effect and dynamic balance of the first slider 2 and the second slider 3 during the rotation of the rotating shaft body 1, thereby helping to extend the service life of the first slider 2 and the second slider 3.

[0060] As a preferred implementation method, such as Figures 5 to 7 As shown in the diagram, both the first slider 2 and the second slider 3 are cylindrical. The end of the first slider 2 facing away from the second slider 3 has a first blocking plate 201, and a first elastic element 101 is a first spring located between the rotating shaft body 1 and the first blocking plate 201. The end of the second slider 3 facing away from the first slider 2 has a second blocking plate 301, and a second elastic element 102 is a second spring located between the rotating shaft body 1 and the second blocking plate 301. The edge of the second blocking plate 301 protrudes outward from the second slider 3, allowing the edge of the second blocking plate 301 to abut against the first end of the first slider 2, thereby limiting the sliding amount of the first slider 2 towards the second slider 3 and further ensuring the operational stability of the flow regulating unit 10.

[0061] Here, the cylindrical shape of the first slider 2 and the second slider 3, along with the arrangement of the blocking plate and spring, plays a positive role in improving cooling efficiency and reducing cooling costs from multiple aspects, including optimizing coolant flow, stabilizing flow regulation, facilitating maintenance, and extending component lifespan. This contributes to a more economical and efficient operation of the motor shaft cooling system. Furthermore, the arrangement of the first blocking plate 201 and the second blocking plate 301 further enhances the structural strength and stability of the first slider 2 and the second slider 3.

[0062] To facilitate the flow of coolant through the flow regulating section 10, specifically, a through hole on the first slider 2 is provided at the second end of the first slider 2 and extends radially through it. For ease of description, the through hole communicating with the cooling channel 100 upstream of the flow regulating section 10 is referred to as the first through hole 202, and the through hole communicating with the cooling channel 100 downstream of the flow regulating section 10 is referred to as the second through hole 203. The coolant flows into the space formed between the first slider 2 and the second slider 3 through the first through hole 202, and then flows out through the second through hole 203.

[0063] In a preferred embodiment, the conduction position in this embodiment includes a first conduction position. In the first conduction position, the first slider 2 cuts off the cooling channel 100, and the flow regulating part 10 allows coolant to flow through the through hole. The first slider 2 cutting off the cooling channel 100 and the coolant flowing through the through hole of the flow regulating part 10 ensures that even when the rotational speed of the shaft body 1 is low, coolant can still flow into the cooling channel 100 and be sprayed out through the oil outlet for cooling. In the first conduction position, the flow rate of coolant flowing through the flow regulating part 10 is relatively small.

[0064] In terms of specific structure, such as Figure 1As shown, in the first conductive position, the rotational speed of the shaft body 1 is relatively small. At this time, the centrifugal force of the first slider 2 is less than the elastic force of the first elastic element 101, and the centrifugal force of the second slider 3 is less than the elastic force of the second elastic element 102. Neither the first slider 2 nor the second slider 3 slides relative to the shaft body 1, and the first end of the first slider 2 has the maximum insertion depth in the second mounting hole 104. At this time, the flow regulating part 10 is in the low flow opening state.

[0065] When the vehicle is in a low speed range or stopped, such as when the vehicle speed is less than 10 kph, due to the low speed and high torque and the condition of stopping and boosting charging, the rotor needs to be provided with a suitable flow for cooling. At this time, the flow regulating part 10 is in the first conducting position, and the oil will cool the rear part that needs to be cooled by cooperating with the first through hole 202 and the second through hole 203 on the first slider 2, so as to meet the cooling requirements of the rotor when stopping and boosting charging.

[0066] Furthermore, the conduction position in this embodiment includes a second conduction position. In the second conduction position, the first slider 2 cuts off the cooling channel 100, the through hole is located within the first mounting hole 103, and the flow area of ​​the flow regulating part is zero. This ensures that in the second conduction position, with the through hole located within the first mounting hole 103 and the flow area of ​​the flow regulating part zero, under certain specific operating conditions, such as when the motor is just starting up or operating at extremely low load, continuous cooling by the coolant is not required, thus avoiding coolant waste.

[0067] Specifically, such as Figure 2 As shown, in the second conductive position, the rotational speed of the shaft body 1 increases. At this time, the centrifugal force of the first slider 2 is greater than the elastic force of the first elastic element 101, and the centrifugal force of the second slider 3 is greater than the elastic force of the second elastic element 102. Both the first slider 2 and the second slider 3 slide away from the axis of the shaft body 1, so that the first through hole 202 and the second through hole 203 are both located in the first mounting hole 103 and are blocked by the first mounting hole 103. However, the insertion depth of the first end of the first slider 2 inserted into the second mounting hole 104 is reduced. At this time, the coolant cannot flow through the flow regulating part 10, and the flow regulating part 10 is in the closed state.

[0068] When the vehicle outputs power under low load, such as when the vehicle body is at 10-50 kph, the rotor of the power motor does not need to be cooled by flow, and only the reducer and motor stator need to be cooled. Therefore, the demand for the cooling system is low, and the speed of the electric pump 6 is in the low speed range. As the speed of the drive motor increases, the flow regulating section 10 is opened, so that the flow regulating section 10 is in the second conduction position. At this time, the channel for charging during parking is closed, and the oil cannot pass through the structure of the flow regulating section 10.

[0069] In this embodiment, the conduction position also includes a third conduction position. In the third conduction position, the through hole is located within the first mounting hole 103, and a flow space 105 is formed between the first slider 2, the second slider 3, and the rotating shaft body 1. The flow regulating part circulates coolant through the flow space 105. In the third conduction position, the flow regulating part circulates coolant through the flow space 105 between the first slider 2, the second slider 3, and the rotating shaft body 1, which helps to increase the flow area of ​​the flow regulating part 10, thereby meeting the cooling requirements of the rotating shaft body 1 at higher speeds.

[0070] Specifically, such as Figure 3 As shown, the flow space 105 is generally shaped like a groove with its opening facing the axis of the cooling channel 100. In the first and second open positions, the opening of the flow space 105 is blocked because the first end of the first slider 2 is inserted into the flow space 105. When the flow regulating unit 10 is in the third open position, the first end of the first slider 2 is outside the flow space 105, thereby releasing the blockage of the opening.

[0071] At the third conducting position, the rotational speed of the shaft body 1 continues to increase. At this time, the centrifugal force of the first slider 2 is much greater than the elastic force of the first elastic element 101, and the centrifugal force of the second slider 3 is much greater than the elastic force of the second elastic element 102. Both the first slider 2 and the second slider 3 continue to slide away from the axis of the shaft body 1, so that the first end of the first slider 2 disengages from the second mounting hole 104. The coolant flows into the flow space 105 through the second mounting hole 104 and continues to flow backward through the second mounting hole 104. At this time, the flow regulating part 10 is in the open state with the maximum flow.

[0072] When the vehicle outputs power under high load, such as when the vehicle speed is greater than 50 kph, the rotor of the power motor needs cooling flow to cool it because it rotates at high speed. In addition to the cooling of the reducer and the motor stator, the rotor demand is increased. The speed of the electronic pump 6 is controlled to be increased from the low speed range to the medium speed range. At this time, the flow regulating unit 10 continues to open based on the centrifugal force provided by the rotor speed and switches to the third conduction position, so that the coolant flows through the flow space 105.

[0073] To further improve the cooling effect, the oil outlet in this embodiment includes a first oil outlet hole located near the inlet of the cooling channel 100, and a second oil outlet hole located at the other end of the shaft body 1. The combination of the first and second oil outlet holes facilitates the spraying of coolant onto the rotor that requires cooling, thereby improving the cooling effect on the rotor.

[0074] In this embodiment, the flow regulating unit 10 is located on the side of the first oil outlet near the inlet, and the first and second oil outlets are multiple ones spaced apart along the circumference of the rotating shaft body 1. This arrangement of multiple first and second oil outlets spaced apart along the circumference of the rotating shaft body 1 helps to further improve the uniformity of coolant spraying, thereby improving cooling efficiency. Of course, in practice, the number of first oil outlets can be adjusted adaptively according to usage requirements.

[0075] It should be noted that in this embodiment, it is also feasible to not provide a second elastic part between the second slider 3 and the second mounting hole 104, and to directly fix the fourth end of the second slider 3 in the second mounting hole 104. However, in this case, the dynamic balance of the entire rotating shaft body 1 is worse when the first slider 2 slides.

[0076] In addition, the rotating shaft body 1 in this embodiment may also include a main body part having the above-mentioned cooling channel 100, and a seat part having the cooling channel 100. The first mounting hole 103 and the second mounting hole 104 are both provided through the seat part. The first slider 2 is slidably disposed in the first mounting hole 103 in the seat part, and the second slider is slidably disposed in the second mounting hole 104 in the seat part. This facilitates the arrangement and implementation of the flow regulating part 10.

[0077] The motor shaft structure described in this embodiment, through the arrangement of the first slider 2 and the second slider 3 in the flow regulating section 10 and the elastic element, allows the flow regulating section 10 to have a first conducting position with a small opening, a third conducting position with a large opening, and a second conducting position in a closed state. Furthermore, the switching of the conducting position of the flow regulating section 10 relies solely on the rotational speed of the shaft body 1, which facilitates automatic adjustment of the conducting position of the flow regulating section 10 according to different usage requirements, thereby meeting cooling needs under different conditions.

[0078] Compared to existing technologies that use solenoid valves and control units, this motor shaft structure is not only lower in cost and easier to implement, but also offers higher operational stability. By incorporating a flow regulation unit 10, tiered control of stator and rotor flow based on rotational speed is achieved, which improves motor transmission efficiency and extends high-load operating time.

[0079] Example 2

[0080] This embodiment relates to an electric motor, including the motor shaft structure described above.

[0081] The motor described in this embodiment, by setting the motor shaft structure as described above, helps to improve cooling efficiency and motor performance.

[0082] Example 3

[0083] This embodiment relates to a vehicle, including a motor and an oil cooler 7 as described above, a main oil circuit 8 connected to the oil cooler 7, and a first oil circuit 801 for connecting the main oil circuit 8 to a cooling channel 100, wherein the first oil circuit 801 is connected to the inlet of the cooling channel 100.

[0084] In terms of specific structure, such as Figure 8 As shown, the cooling oil in the oil cooler 7 flows into the inlet of the cooling channel 100 through the main oil passage 8 and the first oil passage 801 in sequence, and continues to flow backward through the flow regulating unit 10, thereby cooling the shaft body 1 and the rotor.

[0085] Furthermore, it also includes a second oil passage 802 for connecting the main oil passage 8 and the cooling channel 100. The connection port of the second oil passage 802 and the cooling channel 100 is located on the side of the flow regulating section 10 away from the inlet, and a one-way flow section is provided on the second oil passage 802 to limit the one-way flow of coolant oil from the second oil passage 802 to the cooling channel 100. When the pressure of the coolant oil upstream of the one-way flow section meets the opening condition of the one-way flow section, the second oil passage 802 is opened, and at this time the oil can flow into the cooling channel 100 through the second oil passage 802.

[0086] Reference Figure 8 As shown, the transmission fluid is concentrated in the oil pan 4. When cooling and lubrication are required, the control unit energizes the electric pump 6, causing it to rotate. Fluid flows from the oil pan 4 through the suction filter 5 into the pump's suction port. The fluid from the electric pump 6 is then delivered to the oil cooler 7, where it exchanges heat with the coolant from the vehicle. The fluid flowing out of the oil cooler 7 flows into the main oil passage 8 and through the first oil passage 801 into the cooling channel 100. It can also flow into the cooling channel 100 through the check valve 9 on the second oil passage 802.

[0087] The vehicle described in this embodiment, through the arrangement of the main oil circuit 8, the first oil circuit 801, and the aforementioned motor, facilitates improved motor performance. Furthermore, the inclusion of the second oil circuit 802 and the one-way flow section, in conjunction with the flow regulating unit 10 on the first oil circuit 801, allows for cooling of the rotating shaft, thereby further enhancing motor performance.

[0088] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A motor shaft structure, characterized in that: It includes a rotating shaft body (1) and a flow regulating part (10) provided on the rotating shaft body (1). The rotating shaft body (1) is provided with a cooling channel (100) arranged along its own axial direction, an oil outlet communicating with the cooling channel (100), and a first mounting hole (103) arranged radially along the rotating shaft body (1) on one side of the cooling channel (100). The flow regulating part (10) includes a first slider (2) slidably disposed in the first mounting hole (103), a first elastic member (101) disposed between the rotating shaft body (1) and the first slider (2), and a second slider (3) disposed on the rotating shaft body (1). The second slider (3) has an extension portion extending into the cooling channel (100). The first slider (2) is sleeved outside the extension portion and has a through hole for coolant to pass through. Depending on the rotational speed of the rotating shaft body (1), the first slider (2) can be in multiple conductive positions, and the flow area formed by the flow regulating part (10) is different in each conductive position.

2. The motor shaft structure according to claim 1, characterized in that: The conduction position includes a first conduction position. In the first conduction position, the first slider (2) cuts off the cooling channel (100), and the flow regulating part (10) circulates the coolant through the through hole.

3. The motor shaft structure according to claim 2, characterized in that: The conduction position includes a second conduction position. In the second conduction position, the first slider (2) cuts off the cooling channel (100), the through hole is located in the first mounting hole (103), and the flow area of ​​the flow regulating part (10) is zero.

4. The motor shaft structure according to claim 3, characterized in that: The conduction position includes a third conduction position. In the third conduction position, the through hole is located in the first mounting hole (103) and a flow space (105) is formed between the first slider (2), the second slider (3) and the rotating shaft body (1). The flow regulating part (10) circulates the coolant through the flow space (105).

5. The motor shaft structure according to claim 4, characterized in that: A second mounting hole (104) is provided on the shaft body (1) on the other side of the cooling channel (100), relative to the first mounting hole (103). The second slider (3) is slidably disposed in the second mounting hole (104), and a second elastic element (102) is provided between the second slider (3) and the rotating shaft body (1). In the first conductive position and the second conductive position, part of the first slider (2) is located in the second mounting hole (104).

6. The motor shaft structure according to claim 5, characterized in that: Both the first slider (2) and the second slider (3) are cylindrical; The first slider (2) has a first blocking plate (201) at one end opposite to the second slider (3), and the first elastic element (101) is a first spring located between the rotating shaft body (1) and the first blocking plate (201). Alternatively, the second slider (3) has a second blocking plate (301) at one end opposite to the first slider (2), and the second elastic element (102) is a second spring located between the rotating shaft body (1) and the second blocking plate (301).

7. The motor shaft structure according to any one of claims 1 to 6, characterized in that: The oil outlet includes a first oil outlet hole located near the inlet of the cooling channel (100) and a second oil outlet hole located at the other end of the shaft body (1); The flow regulating part (10) is located on the side of the first oil outlet near the inlet, and the first oil outlet and / or the second oil outlet are a plurality of them arranged at circumferential intervals along the rotating shaft body (1).

8. An electric motor, characterized in that: The motor shaft structure includes any one of claims 1 to 7.

9. A vehicle, characterized in that: It includes the motor and oil cooler (7) as described in claim 8, a main oil passage (8) connected to the oil cooler (7), and a first oil passage (801) for connecting the main oil passage (8) and the cooling channel (100), wherein the first oil passage (801) is connected to the inlet of the cooling channel (100).

10. The vehicle according to claim 9, characterized in that: It also includes a second oil passage (802) for connecting the main oil passage (8) and the cooling passage (100); The connection between the second oil passage (802) and the cooling channel (100) is located on the side of the flow regulating part (10) away from the inlet, and a one-way flow part is provided on the second oil passage (802) to limit the coolant oil to flow unidirectionally from the second oil passage (802) to the cooling channel (100).

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