Oil circuit structure of motor rotor and motor

Abstract

The utility model relates to an oil circuit structure of a motor rotor and a motor, including a rotor shaft, a rotor core and two end plates, wherein the rotor shaft is provided with a first oil guide section and a second oil guide section connected to each other; the rotor core surrounds the rotor shaft, a third oil guide section is provided between the rotor core and the rotor shaft, and a fifth oil guide section running through both axial ends is provided in the rotor core; the two end plates are respectively abutted against both axial ends of the rotor core, a fourth oil guide section and a sixth oil guide section are provided between each end plate and the rotor core, and a seventh oil guide section is provided on the end plate, and adjacent oil guide sections are arranged perpendicular to each other. With this scheme, both ends of each radial oil guide section are connected to an axial oil guide section, and the radial oil guide section is similar to a centrifugal pump and will generate centrifugal suction on the axial oil guide section, thereby increasing the flow velocity of the oil in the axial oil guide section, strengthening convective heat exchange, and improving the heat dissipation effect; reducing the amount of oil accumulation in the axial oil guide section, and reducing the risk of leakage in the rotor oil circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotors, in particular to an oil circuit structure of a motor rotor and a motor. Background Art

[0002] In the motor thermal management system, in order to cool the motor rotor core and magnets, oil guide grooves or oil holes are usually opened on the core, and then with the hollow rotor shaft, oil is introduced into the rotor core to directly cool the core and magnets. The oil is finally thrown out from the oil holes of the rotor end plate. In order to ensure that the magnets are fully cooled, the common design idea is to design the oil holes and oil grooves of the rotor core to be more complex to increase the heat exchange area between the oil and the rotor to enhance the heat exchange. However, the complex oil circuit will reduce the flow rate of the oil, and even the local oil circuit will be blocked and oil will accumulate. The oil that has lost its fluidity will remain in the oil circuit for a long time, and will eventually be heated to a high temperature by the core and magnets, losing its heat dissipation ability. When the motor is at high speed, the accumulated oil that has lost its fluidity under the action of large centrifugal force will leak along the tiny gaps between the core punchings to the stator-rotor gap, causing large oil friction loss. The heat generated by the oil friction loss is transferred to the magnets through the surface of the rotor core, which will cause overheating and demagnetization of the magnets. Utility Model Content

[0003] Based on this, an oil circuit structure of a motor rotor and a motor are provided to improve the problem in the prior art that the cooling oil easily loses fluidity, thereby causing oil friction loss.

[0004] On the one hand, the utility model provides an oil circuit structure of a motor rotor, comprising:

[0005] A rotor core shaft, wherein the rotor core shaft is provided with a first oil guide section and a second oil guide section connected to each other;

[0006] The rotor core is surrounded by the rotor shaft, a third oil guide section is provided between the rotor core and the rotor shaft, and a fifth oil guide section is provided in the rotor core and runs through both ends of the axial direction;

[0007] Two end plates, the two end plates are respectively abutted against two ends of the rotor core in the axial direction, a fourth oil guide section and a sixth oil guide section are provided between each end plate and the rotor core, and a seventh oil guide section is also provided on the end plate;

[0008] Among them, the first oil guide section, the second oil guide section, the third oil guide section, the fourth oil guide section, the fifth oil guide section, the sixth oil guide section and the seventh oil guide section are connected in sequence and form a first oil outlet channel, and the adjacent oil guide sections in the first oil outlet channel are arranged perpendicular to each other, and the first oil guide section, the third oil guide section, the fifth oil guide section and the seventh oil guide section are all parallel to the axial direction of the rotor core shaft.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] In one implementation, the oil circuit structure includes at least two groups of first oil outlet channels, and different first oil outlet channels are evenly distributed along the circumference of the rotor core.

[0011] In one implementation, the first oil guiding section is located at the axis of the rotor core shaft, and the second oil guiding section extends along the radial direction of the rotor core shaft and is evenly distributed in the circumferential direction of the rotor core shaft.

[0012] In one implementation, the end plate further comprises:

[0013] A first mounting hole, the first mounting hole is located in the middle of the end plate and is used to place the rotor core shaft;

[0014] An oil guide groove, the oil guide groove is arranged around the first mounting hole;

[0015] A fourth oil groove, the fourth oil groove extends in the radial direction of the end plate, a plurality of fourth oil grooves are evenly distributed in the circumferential direction of the end plate, and the fourth oil groove and the end surface of the rotor core together form a fourth oil guide section;

[0016] The sixth oil groove is arranged between the adjacent fourth oil grooves, the number of the sixth oil grooves is equal to that of the fourth oil grooves, and the sixth oil groove and the end surface of the rotor core together form a sixth oil guide section;

[0017] The seventh oil guiding section is arranged parallel to the axial direction of the end plate.

[0018] In one implementation, one end of the fourth oil groove away from the oil guide groove is partially enlarged, and the partially enlarged structure of the fourth oil groove is used to connect to the fifth oil guide section.

[0019] In one implementation, the sixth oil groove is symmetrically arranged along the radial direction of the end plate, the seventh oil guide section is opened on the symmetry axis of the sixth oil groove, and the seventh oil guide section is located at the farthest end of the sixth oil groove away from the center of the end plate.

[0020] In one implementation, the two end plates of the oil circuit structure are arranged staggered along the axial rotation; the second oil guide section is arranged along the radial direction of the rotor core shaft, the third oil guide section runs through the two end surfaces of the rotor core in the axial direction, the two ends of the third oil guide section are respectively connected to different end plates, one end of the third oil guide section is connected to the fourth oil guide section, and the other end of the third oil guide section is connected to the oil guide groove;

[0021] The oil circuit structure also includes at least two groups of second oil outlet channels, each group of second oil outlet channels includes a first oil guide section, a second oil guide section, a third oil guide section, an oil guide groove, a fourth oil guide section, a fifth oil guide section, a sixth oil guide section and a seventh oil guide section connected in sequence.

[0022] In one implementation manner, the first oil outlet channel and the second oil outlet channel each include four, and the seventh oil guiding sections corresponding to the two oil outlet channels are located on different end plates.

[0023] In one implementation, the rotor core includes:

[0024] A second mounting hole, the second mounting hole is located in the middle of the rotor core and is used to place the rotor core shaft;

[0025] A third oil groove, the third oil groove is arranged along the inner wall of the second mounting hole, and the third oil groove and the rotor core shaft together form a third oil guide section;

[0026] a fifth oil guiding section, the fifth oil guiding section being arranged in parallel with the third oil groove;

[0027] A plurality of magnetic steel grooves are provided and surround the fifth oil guiding section.

[0028] On the other hand, the utility model also provides a motor, including an oil circuit structure of a motor rotor.

[0029] The beneficial effects of the utility model are as follows: by setting a first oil outlet channel, and the first oil outlet channel includes seven oil guide sections connected in sequence, the adjacent oil guide sections are arranged perpendicular to each other, and the first oil guide section, the third oil guide section, the fifth oil guide section and the seventh oil guide section are all parallel to the axial direction of the rotor core shaft, and it can be known that the second oil guide section, the fourth oil guide section and the sixth oil guide section are all arranged along the radial direction of the rotor core shaft; when the oil is thrown off, the cooling oil in the oil guide section arranged along the axial direction is attracted by the oil guide section arranged along the radial direction, so that the cooling oil is sequentially discharged, specifically: ... in the oil guide section is sequentially discharged, specifically: when the oil is thrown off, the cooling oil in the oil guide section arranged along the axial direction is attracted by the oil guide section arranged along the radial direction, so that the cooling oil in the oil guide section is sequentially discharged, specifically: when the oil is thrown off, the cooling oil in the oil guide section arranged along the axial direction is attracted by the oil guide section arranged along the radial direction, so that the cooling oil in the oil guide section is sequentially discharged, specifically: when the oil is thrown off, the The oil section sucks the oil in the first oil guiding section into the third oil guiding section, sucks the oil in the third oil guiding section into the fifth oil guiding section through the fourth oil guiding section, sucks the oil in the fifth oil guiding section into the seventh oil guiding section through the sixth oil guiding section, and finally the oil is thrown out from the seventh oil guiding section; in summary, both ends of each radial oil guiding section are connected to an axial oil guiding section, the radial oil guiding section is similar to a centrifugal pump and will generate centrifugal suction on the axial oil guiding section, thereby increasing the flow velocity of the oil in the axial oil guiding section, strengthening convective heat exchange, and improving the heat dissipation effect; reducing the amount of oil accumulated in the axial oil guiding section, and reducing the risk of leakage in the rotor oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic axial cross-sectional view of an oil circuit structure of a motor rotor in one embodiment;

[0031] Figure 2 is a schematic structural diagram of an end plate in one embodiment;

[0032] Figure 3 Schematic diagram of a radial cross-section of an oil circuit structure of a motor rotor in one embodiment.

[0033] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0034] 10. rotor core shaft; 11. first oil guide section; 12. second oil guide section;

[0035] 20. rotor core; 21. fifth oil guide section; 22. magnetic steel slot;

[0036] 30. end plate; 31. first mounting hole; 32. oil guide groove; 33. fourth oil groove; 34. sixth oil groove; 35. seventh oil guide section;

[0037] 41. The third oil guide section; 42. The fourth oil guide section; 43. The sixth oil guide section. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] An oil circuit structure of a motor rotor, see Figure 1 , comprising a rotor shaft 10, a rotor core 20 and two end plates 30, the rotor shaft 10 is provided with a first oil guide section 11 and a second oil guide section 12 connected to each other; the rotor core 20 surrounds the rotor shaft 10, a third oil guide section 41 is provided between the rotor core 20 and the rotor shaft 10, and a fifth oil guide section 21 penetrating through both axial ends is provided in the rotor core 20; the two end plates 30 are respectively in contact with both axial ends of the rotor core 20, and a fourth oil guide section 41 is provided between each end plate 30 and the rotor core 20 2 and the sixth oil guide section 43, and the end plate 30 is further provided with a seventh oil guide section 35; wherein, the first oil guide section 11, the second oil guide section 12, the third oil guide section 41, the fourth oil guide section 42, the fifth oil guide section 21, the sixth oil guide section 43 and the seventh oil guide section 35 are sequentially connected to form a first oil outlet passage, and the adjacent oil guide sections in the first oil outlet passage are perpendicularly arranged to each other, and the first oil guide section 11, the third oil guide section 41, the fifth oil guide section 21 and the seventh oil guide section 35 are all parallel to the axial direction of the rotor core shaft 10.

[0040] The beneficial effects of this embodiment are as follows: by setting a first oil outlet channel, and the first oil outlet channel includes seven oil guide sections connected in sequence, the adjacent oil guide sections are arranged perpendicular to each other, and the first oil guide section 11, the third oil guide section 41, the fifth oil guide section 21 and the seventh oil guide section 35 are all parallel to the axial direction of the rotor core shaft 10, it can be seen that the second oil guide section 12, the fourth oil guide section 42 and the sixth oil guide section 43 are all arranged along the radial direction of the rotor core shaft 10; when the oil is thrown off, the cooling oil in the oil guide section arranged along the axial direction is attracted by the oil guide section arranged along the radial direction, so that the cooling oil is sequentially discharged, specifically: ... in the oil guide section is sequentially discharged, specifically: when the oil is thrown off, the cooling oil in the oil guide section arranged along the axial direction is attracted by the oil guide section arranged along the radial direction, so that the cooling oil 12 sucks the oil in the first oil guiding section 11 into the third oil guiding section 41, sucks the oil in the third oil guiding section 41 into the fifth oil guiding section 21 through the fourth oil guiding section 42, sucks the oil in the fifth oil guiding section 21 into the seventh oil guiding section 35 through the sixth oil guiding section 43, and finally throws the oil out from the seventh oil guiding section 35; in summary, both ends of each radial oil guiding section are connected to an axial oil guiding section, the radial oil guiding section is similar to a centrifugal pump and will generate centrifugal suction on the axial oil guiding section, thereby increasing the flow velocity of the oil in the axial oil guiding section, strengthening convective heat exchange, and improving the heat dissipation effect; reducing the amount of oil accumulation in the axial oil guiding section, and reducing the risk of leakage in the rotor oil circuit.

[0041] On the basis of the above embodiment, since the fifth oil guiding section 21 is arranged along the axial direction parallel to the rotor core shaft 10, it can be inferred that: in the first oil outlet channel, the fourth oil guiding section 42 and the sixth oil guiding section 43 are connected through the fifth oil guiding section 21, the fourth oil guiding section 42 and the sixth oil guiding section 43 belong to different end plates 30, and the sixth oil guiding section 43 and the seventh oil guiding section 35 belong to the same end plate 30.

[0042] In some embodiments, see Figure 1 The oil circuit structure includes at least two groups of first oil outlet channels, and different first oil outlet channels are evenly distributed along the circumference of the rotor core 20. In this way, multiple groups of first oil outlet channels are provided, which increases the flow rate of coolant flowing through the rotor core shaft 10, thereby improving the cooling effect on the rotor core shaft 10 and the magnetic steel.

[0043] Based on the above embodiment, there are four groups of first oil outlet channels which are evenly distributed.

[0044] In some embodiments, see Figure 1 , the first oil guide section 11 is located at the axis of the rotor core shaft 10, and the second oil guide section 12 extends along the radial direction of the rotor core shaft 10 and is evenly distributed in the circumferential direction of the rotor core shaft 10. In this way, the first oil guide section 11 is located at the axis of the rotor core shaft 10 to introduce the cooling oil, and the second oil guide section 12 extends along the radial direction of the rotor core shaft 10 and is evenly distributed in the circumferential direction, so that the cooling oil is evenly introduced into the rotor core 20, thereby improving the cooling effect.

[0045] In some embodiments, see Figure 1 and Figure 2 The end plate 30 further includes a first mounting hole 31, an oil guide groove 32, a fourth oil groove 33, a sixth oil groove 34 and a seventh oil guide section 35. The first mounting hole 31 is located in the middle of the end plate 30 and is used to place the rotor core shaft 10. The oil guide groove 32 is arranged around the first mounting hole 31; the fourth oil groove 33 extends along the radial direction of the end plate 30, and the fourth oil grooves 33 are evenly distributed in the circumferential direction of the end plate 30 and are provided with a plurality of them. The fourth oil grooves 33 and the end surface of the rotor core 20 together form a fourth oil guide section 42; the sixth oil grooves 34 are arranged between adjacent fourth oil grooves 33, and the number of the sixth oil grooves 34 and the fourth oil grooves 33 is equal. The sixth oil grooves 34 and the end surface of the rotor core 20 together form a sixth oil guide section 43; the seventh oil guide section 35 is arranged parallel to the axial direction of the end plate 30. In this way, the end plate 30 is provided with an oil guide groove 32 for circumferential oil guide, so that the cooling oil flowing in from the oil guide groove 32 can enter different fourth oil grooves 33 to divert the oil and cool the whole; the oil guide groove 32, the fourth oil groove 33 and the sixth oil groove 34 are all local groove structures provided on the end plate 30, and a complete oil guide section is formed by fitting with the end surface of the rotor core shaft 10.

[0046] In some embodiments, see Figure 1 and Figure 2 , the end of the fourth oil groove 33 away from the oil guide groove 32 is partially enlarged, and the partially enlarged structure of the fourth oil groove 33 is used to connect the fifth oil guide section 21. In this way, the fourth oil groove 33 is partially enlarged and this part is used to connect the fifth oil guide section 21, which improves the smoothness of the oil entering the fifth oil guide section 21, and facilitates the efficient cooling and transmission of the oil.

[0047] In some embodiments, see Figure 1 and Figure 2 The sixth oil groove 34 is symmetrically arranged along the radial direction of the end plate 30, and the seventh oil guide section 35 is opened on the symmetry axis of the sixth oil groove 34. The seventh oil guide section 35 is located at the farthest end of the sixth oil groove 34 away from the center of the end plate 30. In this way, the seventh oil guide section 35 is arranged on the symmetry axis of the sixth oil groove 34, and the seventh oil guide section 35 is farthest from the center of the end plate 30. Under the action of centrifugal force, the oil is easy to gather toward the position of the seventh oil guide section 35 and then flow out from the seventh oil guide section 35.

[0048] In some embodiments, see Figure 1 and Figure 2The two end plates 30 of the oil circuit structure are arranged staggered in axial rotation; the second oil guide section 12 is arranged along the radial direction of the rotor core shaft 10, the third oil guide section 41 runs through the two end surfaces of the rotor core 20 in the axial direction, the two ends of the third oil guide section 41 are respectively connected to different end plates 30, one end of the third oil guide section 41 is connected to the fourth oil guide section 42, and the other end of the third oil guide section 41 is connected to the oil guide groove 32; the oil circuit structure also includes at least two groups of second oil outlet channels, each group of second oil outlet channels includes the first oil guide section 11, the second oil guide section 12, the third oil guide section 41, the oil guide groove 32, the fourth oil guide section 42, the fifth oil guide section 21, the sixth oil guide section 43 and the seventh oil guide section 35 connected in sequence. In this way, the two end plates 30 are staggered in axial direction, so as to facilitate the arrangement of the first oil outlet channel and the second oil outlet channel, and the first oil outlet channel and the second oil outlet channel can be alternately arranged in the circumferential direction of the rotor core 20, so as to improve the cooling effect on the rotor core 20 and the magnetic steel.

[0049] Specifically, in the first oil outlet channel, the cooling oil flows in each oil guide section in a straight / linear direction; in the second oil outlet channel, the cooling oil needs to additionally pass through the non-straight segment in the oil guide groove 32, that is, it needs to pass through the local arc segment of the oil guide groove 32, and divert the oil.

[0050] In some embodiments, see Figure 1 and Figure 3 The first oil outlet channel and the second oil outlet channel each include four, and the seventh oil guide sections 35 corresponding to the two oil outlet channels are located on different end plates 30. In this way, four first oil outlet channels and four second oil outlet channels are provided. When specifically arranged, the two types of oil outlet channels are alternately arranged. Two end plates 30 are provided, one end plate 30 is used for the oil outlet of the first oil outlet channel, and the other end plate 30 is used for the oil outlet of the second oil outlet channel; all the first oil outlet channels and all the second oil outlet channels share a first oil guide section 11, and a first oil outlet channel and a second oil outlet channel share a second oil guide section 12. Each second oil guide section 12 is connected to the middle of the third oil guide section 41. The oil entering the third oil guide section 41 from the second oil guide section 12 has two flow directions, and the two flow directions correspond to different first oil outlet channels and second oil outlet channels, respectively; in summary, there is one first oil guide section 11, four second oil guide sections 12 and four third oil guide sections 41, and there are eight oil guide grooves 32, four fourth oil guide sections 42, five oil guide sections 21, six oil guide sections 43 and seven oil guide sections 35.

[0051] Based on the above embodiment, there are eight fourth oil grooves 33 on the two end plates 30, the angle between adjacent fourth oil grooves 33 on the same end plate 30 is 90°, and the axial rotation angle of the two end plates 30 is 45°.

[0052] In some embodiments, see Figure 1 and Figure 3The rotor core 20 includes a second mounting hole, a third oil groove, a fifth oil guide section 21 and a magnetic steel groove 22. The second mounting hole is located in the middle of the rotor core 20 and is used to place the rotor core shaft 10. The third oil groove is arranged along the inner wall of the second mounting hole. The third oil groove and the rotor core shaft 10 together form a third oil guide section 41. The fifth oil guide section 21 is arranged in parallel with the third oil groove. A plurality of magnetic steel grooves 22 are provided and surround the fifth oil guide section 21. In this way, by arranging the fifth oil guide section 21 in the rotor core 20, the third oil groove and the rotor core shaft 10 together form the third oil guide section 41, so that the oil flowing through the two oil guide sections can cool the rotor core 20, increase the contact area between the rotor core 20 and the cooling oil, and help improve the cooling effect.

[0053] Based on the above embodiments, see Figure 1 and Figure 3 The cross section of the third oil groove is rectangular and runs through both ends of the rotor core 20 in the axial direction, so the two ends of the third oil groove are respectively connected to the two end plates 30, and the number of the fifth oil guide sections 21 is twice that of the third oil groove.

[0054] A motor includes an oil circuit structure of a motor rotor.

[0055] Specifically, the rotor core 20 is formed by stacking a plurality of silicon steel sheets, and the rotor core shaft 10, the rotor core 20 and the rotor end plate 30 are fixed by means of a clamping groove and a fastening ring. The magnet is placed in the magnet groove 22 of the rotor core 20 and fixed by the end plates 30 on both sides. The fifth oil guide section 21 is located in the middle of the four magnets, which can better cool the four magnets. Because the magnet groove 22 is close to the outer side of the rotor core 20, the fourth oil guide section 42 is directly connected to the fifth oil guide section 21 and is not connected to the magnet groove 22, so as to prevent the oil from entering the magnet groove 22 and leaking into the stator-rotor gap; therefore, the rotor oil circuit structure of the present application can significantly increase the flow velocity of the oil in the rotor oil circuit, increase the convective heat transfer coefficient, and improve the heat transfer effect; reduce the amount of oil accumulation in the oil circuit, and reduce the oil friction loss caused by the oil leakage in the rotor.

[0056] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention. Therefore, the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0057] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0058] In the description of the present invention, it is necessary to understand that the terms "center", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An oil circuit structure of a motor rotor, characterized in that: include: A rotor core shaft (10), wherein the rotor core shaft (10) is provided with a first oil guide section (11) and a second oil guide section (12) connected to each other; A rotor core (20), the rotor core (20) surrounding the rotor core shaft (10), a third oil guide section (41) being provided between the rotor core (20) and the rotor core shaft (10), and a fifth oil guide section (21) penetrating through both axial ends is also provided in the rotor core (20); Two end plates (30), the two end plates (30) are respectively in contact with two axial ends of the rotor core (20), a fourth oil guide section (42) and a sixth oil guide section (43) are provided between each end plate (30) and the rotor core (20), and a seventh oil guide section (35) is also provided on the end plate (30); The first oil guide section (11), the second oil guide section (12), the third oil guide section (41), the fourth oil guide section (42), the fifth oil guide section (21), the sixth oil guide section (43) and the seventh oil guide section (35) are sequentially connected to form a first oil outlet passage; adjacent oil guide sections in the first oil outlet passage are arranged perpendicular to each other; the first oil guide section (11), the third oil guide section (41), the fifth oil guide section (21) and the seventh oil guide section (35) are all parallel to the axial direction of the rotor core shaft (10).

2. The oil circuit structure of the motor rotor according to claim 1, characterized in that: The oil circuit structure comprises at least two groups of the first oil outlet channels, and different first oil outlet channels are evenly distributed along the circumference of the rotor core (20).

3. The oil circuit structure of the motor rotor according to claim 1, characterized in that: The first oil guide section (11) is located at the axis of the rotor core shaft (10), and the second oil guide section (12) extends in the radial direction of the rotor core shaft (10) and is evenly distributed in the circumferential direction of the rotor core shaft (10).

4. The oil circuit structure of the motor rotor according to claim 1, characterized in that: The end plate (30) further comprises: A first mounting hole (31), the first mounting hole (31) being located in the middle of the end plate (30) and being used for placing the rotor core shaft (10); An oil guide groove (32), the oil guide groove (32) being arranged around the first mounting hole (31); a fourth oil groove (33), the fourth oil groove (33) extending in the radial direction of the end plate (30), the fourth oil groove (33) being evenly distributed in the circumferential direction of the end plate (30) and being provided with a plurality of them, the fourth oil groove (33) and the end surface of the rotor core (20) together forming the fourth oil guide section (42); a sixth oil groove (34), the sixth oil groove (34) being arranged between adjacent fourth oil grooves (33), the number of the sixth oil grooves (34) being equal to the number of the fourth oil grooves (33), and the sixth oil groove (34) and the end surface of the rotor core (20) together forming the sixth oil guide section (43); The seventh oil guide section (35) is arranged parallel to the axial direction of the end plate (30).

5. The oil circuit structure of the motor rotor according to claim 4, characterized in that: One end of the fourth oil groove (33) away from the oil guide groove (32) is partially enlarged, and the locally enlarged structure of the fourth oil groove (33) is used to connect to the fifth oil guide section (21).

6. The oil circuit structure of the motor rotor according to claim 4, characterized in that: The sixth oil groove (34) is symmetrically arranged along the radial direction of the end plate (30), the seventh oil guide section (35) is opened on the symmetry axis of the sixth oil groove (34), and the seventh oil guide section (35) is located at the farthest end of the sixth oil groove (34) away from the center of the end plate (30).

7. The oil circuit structure of the motor rotor according to claim 4, characterized in that: The two end plates (30) of the oil circuit structure are arranged staggered in axial rotation; the second oil guide section (12) is arranged along the radial direction of the rotor core shaft (10); the third oil guide section (41) penetrates the two axial end surfaces of the rotor iron core (20); the two ends of the third oil guide section (41) are respectively connected to different end plates (30); one end of the third oil guide section (41) is connected to the fourth oil guide section (42); and the other end of the third oil guide section (41) is connected to the oil guide groove (32); The oil circuit structure further comprises at least two groups of second oil outlet passages, each group of the second oil outlet passages comprising the first oil guide section (11), the second oil guide section (12), the third oil guide section (41), the oil guide groove (32), the fourth oil guide section (42), the fifth oil guide section (21), the sixth oil guide section (43) and the seventh oil guide section (35) which are connected in sequence.

8. The oil circuit structure of the motor rotor according to claim 7, characterized in that: The first oil outlet channel and the second oil outlet channel each include four, and the seventh oil guide sections (35) corresponding to the two oil outlet channels are located on different end plates (30).

9. The oil circuit structure of the motor rotor according to claim 1, characterized in that: The rotor core (20) comprises: A second mounting hole, the second mounting hole being located in the middle of the rotor core (20) and being used for placing the rotor core shaft (10); a third oil groove, the third oil groove being arranged along the inner wall of the second mounting hole, the third oil groove and the rotor core shaft (10) together forming the third oil guide section (41); The fifth oil guide section (21), the fifth oil guide section (21) is arranged in parallel with the third oil groove; A plurality of magnetic steel grooves (22) are provided and surround the fifth oil guide section (21).

10. A motor, characterized in that: An oil circuit structure comprising a motor rotor as described in any one of claims 1-9.

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