A rotor oil quantity control structure and motor thereof

Abstract

The utility model relates to a rotor oil quantity control structure and a motor thereof, comprising a rotor, the rotor comprising a rotating shaft and a rotor core mounted on the rotating shaft, the rotating shaft comprising a rotating shaft body and an oil inlet short shaft, a balloon is press-fitted on the outer end of the head of the oil inlet short shaft, the shaft cavity comprises a shaft cavity body and an oil inlet space formed on both sides of the balloon, a gap connecting the shaft cavity body and the oil inlet space is formed between the circumference of the balloon and the inner wall of the shaft cavity, the balloon can deform under the action of the centrifugal force of the rotating shaft to cling to the inner wall of the shaft cavity to block the gap to isolate the shaft cavity body and the oil inlet space. In the above scheme, under high speed working conditions, the balloon deforms and blocks one side of the inner end of the oil inlet short shaft, so that the oil enters the rotor core, greatly improving the heat dissipation of the rotor magnet and improving the rotor performance. In addition, the oil cannot enter the shaft cavity body through the gap, the oil in the shaft cavity body is very small, and there is basically no oil splashing and hitting the inner wall in the motor shaft, thereby avoiding the torque loss of the motor shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a rotor oil quantity control structure and a motor thereof. Background Art

[0002] The existing oil-cooled motor shaft solution introduces lubricating oil through the spline end or the resolver end, and uses the centrifugal force when the motor rotates to throw the oil through the oil outlet holes on the shaft body. Therefore, the amount of oil in the rotor cannot be controlled under high-speed conditions, and under high-speed conditions, due to the centrifugal force, the oil flow rate of the oil holes on the shaft is extremely high, and the impact may cause the stator insulation material and the bearing retainer to fall off. In addition, under high-speed conditions, the oil is thrown inside the motor shaft and the oil hits the inner wall of the motor shaft, causing more torque loss of the motor shaft. Summary of the invention

[0003] In order to solve the above problems, the first purpose of the utility model is to provide a rotor oil quantity control structure. By arranging a balloon in the shaft cavity, under high speed conditions, the balloon can be deformed and close to the inner wall of the shaft cavity, preventing oil from entering the shaft cavity and reducing oil throwing loss. At the same time, the oil holes on the shaft are aligned with the rotor core, and a core cooling oil channel is constructed on the rotor core to connect with the oil hole, taking into account the cooling of the rotor magnetic steel and improving the heat dissipation of the rotor. The second purpose of the utility model is to provide a motor having the above-mentioned rotor oil quantity control structure.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A rotor oil quantity control structure comprises a rotor, the rotor comprises a rotating shaft and a rotor core mounted on the rotating shaft, wherein the rotating shaft comprises a rotating shaft body and an oil inlet stub shaft, a shaft cavity and an oil outlet passage communicating with each other are formed in the rotating shaft body in an axial direction, the oil inlet stub shaft is interference-connected with the rotating shaft body, and a head of the oil inlet stub shaft extends into the shaft cavity of the rotating shaft body;

[0006] An oil inlet passage and an oil inlet passage are constructed on the inner side of the oil inlet stub shaft, an oil inlet space is formed between the head side wall of the oil inlet stub shaft and the inner wall of the shaft cavity, and the oil inlet passage is arranged on the head of the oil inlet stub shaft to connect the oil inlet passage and the oil inlet space;

[0007] An iron core cooling oil channel is axially constructed on the rotor iron core, and a first oil guide channel and a second oil guide channel are respectively opened on both sides of the rotating shaft body, the first oil guide channel is close to the side of the oil inlet channel and connects the oil inlet space and the iron core cooling oil channel, and the second oil guide channel is close to the side of the oil outlet channel and connects the shaft cavity and the iron core cooling oil channel;

[0008] A balloon is press-fitted on the outer end of the head of the oil inlet short shaft, and the shaft cavity includes a shaft cavity main body and an oil inlet space formed on both sides of the balloon. A gap connecting the shaft cavity main body and the oil inlet space is formed between the circumference of the balloon and the inner wall of the shaft cavity. The balloon can be deformed under the action of the centrifugal force of the rotating shaft and fit tightly against the inner wall of the shaft cavity to block the gap and isolate the shaft cavity main body and the oil inlet space.

[0009] In the above technical solution, under normal speed conditions, the direction of the rotor oil circuit is: the oil enters the oil inlet space from the oil inlet channel, a part of it enters the shaft cavity main body to the oil outlet channel along the gap between the balloon and the inner wall of the shaft cavity, and the other part enters the iron core cooling oil channel along the first oil guide channel, enters the shaft cavity from the second oil guide channel, and comes out from the oil outlet channel.

[0010] Under high speed conditions, the direction of the rotor oil circuit is: the oil enters the oil inlet space from the oil inlet channel, all enters the core cooling oil channel along the first oil guide channel, enters the shaft cavity from the second oil guide channel, and comes out from the oil outlet channel.

[0011] This solution is to set a balloon inside the rotating shaft, which will not affect the basic function of the rotating shaft (motor shaft) and the added weight can be basically ignored.

[0012] Under high-speed conditions, the spherical balloon deforms and blocks the inner end of the oil inlet short shaft. At this time, all the oil passes through the core cooling oil channel. The oil guide channel on the shaft body is connected to the core cooling oil channel, which will not cause the stator insulation material to fall off, the bearing retainer to fall off, etc. In addition, the heat dissipation of the rotor magnet is greatly improved, and the rotor performance is improved. In addition, the oil cannot enter the shaft cavity through the gap, and the amount of oil in the shaft cavity is very small. There is basically no oil splashing and hitting the inner wall in the motor shaft, thereby avoiding the torque loss of the motor shaft.

[0013] Preferably, a convex column is formed at the outer end of the head of the oil inlet short shaft, and the convex column is interference-connected with the balloon. In this technical solution, the convex column of the oil inlet short shaft is interference-connected with the balloon, and the assembly structure is stable, which can effectively prevent the balloon from falling off.

[0014] Preferably, the balloon includes a balloon body, an open channel is provided below the balloon body, the open channel is interference-fitted with the convex column through a metal pressure ring, and the balloon body is made of rubber and coated on the outside of the metal pressure ring. In this technical solution, the metal pressure ring provides a clamping force for balloon installation, and the assembly is more reliable.

[0015] Preferably, the head side wall of the oil inlet short shaft is an inclined surface, and the oil inlet channels are arranged in a plurality of inclined lines, and the outlet of the oil inlet channels faces the first oil guide channel. In this technical solution, the oil inlet channels are arranged in an inclined manner, so that the oil coming out can quickly enter the gap or the first oil guide channel along the outer wall of the oil inlet space, thereby improving the oil circuit circulation efficiency.

[0016] Preferably, a plurality of first oil holes and a second oil hole are respectively constructed circumferentially on both sides of the shaft body, the plurality of first oil holes and the plurality of second oil holes are axially arranged correspondingly, the first oil holes form a first oil guide channel radially inwardly, and the second oil holes form a second oil guide channel radially inwardly;

[0017] Baffles sleeved on the rotating shaft are provided on both sides of the rotor core, and the baffles on both sides correspond to the first oil guide channel and the second oil guide channel respectively; a plurality of oil guide grooves are circumferentially provided on the inner side of one side of the baffle that is in contact with the rotor core, and a pressure oil channel connected to the oil inlet channel is formed between the oil guide groove and the rotor core, and a plurality of core cooling oil channels are arranged, and the plurality of pressure oil channels are respectively connected and arranged on the outside of the plurality of core cooling oil channels.

[0018] In the above technical solution, the oil holes on the rotating shaft body correspond to the oil guide grooves on the baffles on both sides of the rotor core. The oil enters the oil pressure channel after coming out of the first oil guide channel. Each oil pressure channel corresponds to an iron core cooling oil channel, so that the oil enters the iron core cooling oil channel, and then comes out from the oil pressure channel on the other side, enters the second oil guide channel, enters the shaft cavity, and then comes out from the oil outlet channel. Setting the oil guide groove on the baffle can avoid opening a channel on the rotor core, destroying the core structure, and reducing the function of the rotor core.

[0019] Preferably, the outer bottom surface of the oil guide groove is constructed as an inclined surface so that the outer part of the oil pressure channel gradually increases from the inside to the outside. In this technical solution, the outer bottom surface of the oil guide groove is constructed as an inclined surface so that the oil from the first oil guide channel can be quickly pressed into the inner side of the oil pressure channel, or the oil inside the oil pressure channel can be quickly introduced into the second oil guide channel.

[0020] Preferably, the rotor core is formed by punching multiple rotor sheets, and multiple through holes are radially constructed on the rotor sheets. The through holes on the multiple rotor sheets correspond to form a core cooling oil channel, and a groove is formed on the inner side of the bottom surface of the oil guide groove, and the groove corresponds to the through hole. In this technical solution, the groove corresponds to the through hole, which ensures the amount of oil entering the core cooling oil channel and improves the oil circulation efficiency.

[0021] A motor comprises a rotor oil quantity control structure as described in any one of the above. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a rotor oil quantity control structure.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the rotating shaft.

[0024] Figure 3 This is a schematic diagram of the coordination between the rotor core and the baffle.

[0025] Figure 4It is a schematic diagram of the three-dimensional structure of the shaft body.

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the oil inlet short shaft.

[0027] Figure 6 This is a schematic diagram of the assembly of the oil inlet short shaft and the balloon.

[0028] Figure 7 Schematic diagram of the layout of the core cooling oil channel.

[0029] Figure 8 Schematic diagram of the layout of the oil guide groove on the baffle.

[0030] Fig. 9 This is a schematic diagram of the axial structure of a rotor oil quantity control structure.

[0031] Fig.10 for Fig. 9 Schematic diagram of the cross section along the BB direction.

[0032] Fig.11 It is a side structural schematic diagram of a rotor oil quantity control structure.

[0033] Fig.12 for Fig.11 Schematic diagram of the cross section along the FF direction. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] 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 one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Embodiment 1:

[0039] like Figures 1 to 12 A rotor oil quantity control structure shown in the figure comprises a rotor, the rotor comprises a rotating shaft 1 and a rotor core 2 mounted on the rotating shaft 1, the rotating shaft 1 comprises a rotating shaft body 3 and an oil inlet stub shaft 4, a shaft cavity 5 and an oil outlet channel 24 communicating with each other are formed axially in the rotating shaft body 3, the oil inlet stub shaft 4 is interference-connected with the rotating shaft body 3, and the head of the oil inlet stub shaft 4 extends into the shaft cavity 5 of the rotating shaft body 3;

[0040] The inner side of the oil inlet stub shaft 4 is constructed with an oil inlet channel 6 and an oil inlet channel 7, an oil inlet space 8 is formed between the head side wall of the oil inlet stub shaft 4 and the inner wall of the shaft cavity 5, and the oil inlet channel 7 is arranged on the head of the oil inlet stub shaft 4 to connect the oil inlet channel 6 and the oil inlet space 8;

[0041] The rotor core 2 is axially constructed with a core cooling oil passage 9, and the two sides of the shaft body 3 are respectively provided with a first oil guide passage 10 and a second oil guide passage 11, wherein the first oil guide passage 10 is close to a side of the oil inlet passage 6 and connects the oil inlet space 8 and the core cooling oil passage 9, and the second oil guide passage 11 is close to a side of the oil outlet and connects the shaft cavity 5 and the core cooling oil passage 9;

[0042] A balloon 12 is pressed onto the outer end of the head of the oil inlet short shaft 4, and the shaft cavity 5 includes a shaft cavity main body 13 and an oil inlet space 8 formed on both sides of the balloon 12. A gap connecting the shaft cavity main body 13 and the oil inlet space 8 is formed between the circumference of the balloon 12 and the inner wall of the shaft cavity 5. The balloon 12 can be deformed under the action of the centrifugal force of the rotating shaft 1 to fit tightly against the inner wall of the shaft cavity 5 to block the gap and isolate the shaft cavity main body 13 and the oil inlet space 8.

[0043] In the above technical solution, under normal speed conditions, the direction of the rotor oil circuit is: the oil enters the oil inlet space from the oil inlet channel, a part of it enters the shaft cavity main body to the oil outlet channel along the gap between the balloon and the inner wall of the shaft cavity, and the other part enters the iron core cooling oil channel along the first oil guide channel, enters the shaft cavity from the second oil guide channel, and comes out from the oil outlet channel.

[0044] Under high speed conditions, the direction of the rotor oil circuit is: the oil enters the oil inlet space from the oil inlet channel, all enters the core cooling oil channel along the first oil guide channel, enters the shaft cavity from the second oil guide channel, and comes out from the oil outlet channel.

[0045] This solution is to set a balloon inside the rotating shaft, which will not affect the basic function of the rotating shaft (motor shaft) and the added weight can be basically ignored.

[0046] Under high speed conditions, the spherical balloon deforms and blocks the inner end of the oil inlet short shaft. At this time, all the oil passes through the core cooling oil channel. The oil guide channel on the shaft body is connected to the core cooling oil channel, which will not cause the stator insulation material to fall off, the bearing retainer to fall off, etc. In addition, the heat dissipation of the rotor magnet is greatly improved, and the rotor performance is improved. In addition, the oil cannot enter the shaft cavity through the gap, and the amount of oil in the shaft cavity is very small. There will be no oil splashing and hitting the inner wall in the motor shaft, thereby avoiding the torque loss of the motor shaft.

[0047] Furthermore, a boss 14 is formed at the outer end of the head of the oil inlet short shaft 4, and the boss 14 is interference-connected with the balloon 12. In this technical solution, the boss of the oil inlet short shaft is interference-connected with the balloon, and the assembly structure is stable, which can effectively prevent the balloon from falling off.

[0048] Furthermore, the balloon 12 includes a balloon body 16, an open channel is provided below the balloon body 16, the open channel is interference-fitted with the protrusion 14 through a metal pressure ring, and the balloon body 16 is made of rubber and coated on the outside of the metal pressure ring. In this technical solution, the metal pressure ring provides a clamping force for balloon installation, and the assembly is more reliable.

[0049] Furthermore, the head side wall of the oil inlet stub shaft 4 is inclined, and the oil inlet channels 7 are arranged in a slanted manner, and the outlet of the oil inlet channels 7 faces the first oil guide channel 10. In this technical solution, the oil inlet channels are arranged in an inclined manner, so that the oil can quickly enter the gap or the first oil guide channel along the outer wall of the oil inlet space, thereby improving the oil circuit circulation efficiency.

[0050] Furthermore, a plurality of first oil holes 17 and a plurality of second oil holes 18 are respectively constructed circumferentially on both sides of the shaft body 3. The plurality of first oil holes 17 and the plurality of second oil holes 18 are axially arranged correspondingly. The first oil holes 17 form a first oil guide channel 10 radially inwardly, and the second oil holes 18 form a second oil guide channel 11 radially inwardly.

[0051] Baffles 19 sleeved on the rotating shaft 1 are provided on both sides of the rotor core 2, and the baffles 19 on both sides correspond to the first oil guide channel 10 and the second oil guide channel 11 respectively; a plurality of oil guide grooves 20 are circumferentially provided on the inner side of one side of the baffle 19 that is in contact with the rotor core 2, and a pressure oil channel 21 connected to the oil inlet channel 7 is formed between the oil guide groove 20 and the rotor core 2, and a plurality of the core cooling oil channels 9 are arranged, and the plurality of pressure oil channels 21 are respectively arranged and connected to the outside of the plurality of core cooling oil channels 9.

[0052] In the above technical solution, the oil holes on the rotating shaft body correspond to the oil guide grooves on the baffles on both sides of the rotor core. The oil enters the oil pressure channel after coming out of the first oil guide channel. Each oil pressure channel corresponds to an iron core cooling oil channel, so that the oil enters the iron core cooling oil channel, and then comes out from the oil pressure channel on the other side, enters the second oil guide channel, enters the shaft cavity, and then comes out from the oil outlet channel. Setting the oil guide groove on the baffle can avoid opening a channel on the rotor core, destroying the core structure, and reducing the function of the rotor core.

[0053] Furthermore, the outer bottom surface of the oil guide groove 20 is constructed as an inclined surface so that the outer surface of the oil pressure channel 21 gradually increases from the inside to the outside. In this technical solution, the outer bottom surface of the oil guide groove is constructed as an inclined surface to quickly press the oil from the first oil guide channel into the inner side of the oil pressure channel, or quickly guide the oil inside the oil pressure channel into the second oil guide channel.

[0054] Furthermore, the rotor core is formed by punching multiple rotor sheets, and multiple through holes are radially constructed on the rotor sheets. The through holes on the multiple rotor sheets correspond to form the core cooling oil channel 9, and a groove 23 is formed on the inner side of the bottom surface of the oil guide groove 20, and the groove 23 corresponds to the through hole. In this technical solution, the groove corresponds to the through hole, which ensures the amount of oil entering the core cooling oil channel and improves the oil circulation efficiency. Embodiment 2:

[0055] A motor includes a rotor oil quantity control structure in the first embodiment.

[0056] In this specific embodiment, in view of the problem that the amount of oil in the rotor of the existing motor cannot be controlled under high speed working conditions, due to the centrifugal force, the oil flow rate of the oil hole on the shaft is extremely high, and the impact may cause the stator insulation material to fall off, the bearing retainer to fall off, and the oil is thrown inside the motor shaft, and the oil hits the inner wall of the motor shaft, causing a large torque loss of the motor shaft. The above scheme is to set a balloon inside the motor shaft. Under high speed working conditions, the balloon is deformed and blocks the inner end of the oil inlet short shaft. At this time, the oil is all passed through the iron core cooling oil channel, and the oil guide channel on the rotating shaft body is connected to the iron core cooling oil channel, which will not cause the stator insulation material to fall off, the bearing retainer to fall off, etc. In addition, the heat dissipation of the rotor magnetic steel is greatly improved, and the rotor performance is improved. In addition, the oil cannot enter the shaft cavity body through the gap, and the oil in the shaft cavity body is very small. There is basically no oil throwing and hitting the inner wall in the motor shaft, thereby avoiding the torque loss of the motor shaft.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A rotor oil quantity control structure, comprising a rotor, the rotor comprising a rotating shaft (1) and a rotor core (2) mounted on the rotating shaft (1), characterized in that: The rotating shaft (1) comprises a rotating shaft body (3) and an oil inlet stub shaft (4); a shaft cavity (5) and an oil outlet passage (24) communicating with each other are formed axially in the rotating shaft body (3); the oil inlet stub shaft (4) is interference-connected with the rotating shaft body (3), and the head of the oil inlet stub shaft (4) extends into the shaft cavity (5) of the rotating shaft body (3); An oil inlet passage (6) and an oil inlet passage (7) are constructed on the inner side of the oil inlet stub shaft (4); an oil inlet space (8) is formed between the side wall of the head of the oil inlet stub shaft (4) and the inner wall of the shaft cavity (5); and the oil inlet passage (7) is arranged on the head of the oil inlet stub shaft (4) to connect the oil inlet passage (6) and the oil inlet space (8); An iron core cooling oil passage (9) is axially constructed on the rotor iron core (2); a first oil guide passage (10) and a second oil guide passage (11) are respectively provided on both sides of the rotating shaft body (3); the first oil guide passage (10) is close to a side of the oil inlet passage (6) and is connected to the oil inlet space (8) and the iron core cooling oil passage (9); the second oil guide passage (11) is close to a side of the oil outlet and is connected to the shaft cavity (5) and the iron core cooling oil passage (9); A balloon (12) is press-fitted onto the outer end of the head of the oil inlet short shaft (4); the shaft cavity (5) comprises a shaft cavity body (13) and an oil inlet space (8) formed on both sides of the balloon (12); a gap connecting the shaft cavity body (13) and the oil inlet space (8) is formed between the circumference of the balloon (12) and the inner wall of the shaft cavity (5); the balloon (12) can be deformed under the action of the centrifugal force of the rotating shaft (1) to fit closely to the inner wall of the shaft cavity (5) to block the gap and isolate the shaft cavity body (13) and the oil inlet space (8).

2. A rotor oil quantity control structure according to claim 1, characterized in that: A convex column (14) is formed at the outer end of the head of the oil inlet short shaft (4), and the convex column (14) is interference-connected with the balloon (12).

3. A rotor oil quantity control structure according to claim 2, characterized in that: The balloon (12) comprises a balloon body (16), an open channel is provided below the balloon body (16), the open channel is interference-fitted with the convex column (14) via a metal pressure ring, and the balloon body (16) is made of rubber and is coated on the outside of the metal pressure ring.

4. A rotor oil quantity control structure according to claim 1, characterized in that: The head side wall of the oil inlet stub shaft (4) is in the form of an inclined surface, and a plurality of oil inlet channels (7) are arranged obliquely, with the outlet of the oil inlet channel (7) facing the first oil guide channel (10).

5. A rotor oil quantity control structure according to claim 4, characterized in that: A plurality of first oil holes (17) and a plurality of second oil holes (18) are respectively constructed circumferentially on both sides of the rotating shaft body (3); the plurality of first oil holes (17) and the plurality of second oil holes (18) are axially arranged correspondingly; the first oil holes (17) form a first oil guide channel (10) radially inwardly, and the second oil holes (18) form a second oil guide channel (11) radially inwardly; Baffles (19) sleeved on the rotating shaft (1) are provided on both sides of the rotor core (2), and the baffles (19) on both sides correspond to the first oil guide channel (10) and the second oil guide channel (11) respectively; a plurality of oil guide grooves (20) are circumferentially provided on the inner side of one side of the baffle (19) that is in contact with the rotor core (2), and a pressure oil channel (21) communicating with the oil inlet channel (7) is formed between the oil guide groove (20) and the rotor core (2); a plurality of core cooling oil channels (9) are arranged, and the plurality of pressure oil channels (21) are arranged correspondingly and communicated with the outer sides of the plurality of core cooling oil channels (9).

6. A rotor oil quantity control structure according to claim 5, characterized in that: The outer portion of the bottom surface of the oil guide groove (20) is constructed as an inclined surface so that the outer portion of the oil pressure channel (21) gradually increases in size from the inside to the outside.

7. A rotor oil quantity control structure according to claim 6, characterized in that: The rotor core is formed by punching a plurality of rotor punching sheets, a plurality of through holes are radially formed on the rotor punching sheets, the through holes on the plurality of rotor punching sheets correspondingly form a core cooling oil passage (9), a groove (23) is formed on the inner side of the bottom surface of the oil guide groove (20), and the groove (23) corresponds to the through hole.

8. A motor, characterized in that: It comprises a rotor oil quantity control structure as described in any one of claims 1 to 7.

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