Oil-cooled motor rotor structure

Abstract

The utility model relates to the technical field of vehicle motors, in particular to an oil-cooled motor rotor structure, which comprises a rotating shaft and an iron core group, magnetic steel is arranged in the iron core group, and a first end plate and a second end plate are respectively sleeved on two sides of the rotating shaft; first oil guide grooves and first oil collecting grooves are formed in the inner wall of the first end plate; second oil guide grooves and second oil collecting grooves are formed in the inner wall of the second end plate; a first iron core oil way capable of communicating the first oil guide groove with the second oil collection groove and a second iron core oil way capable of communicating the second oil guide groove with the first oil collection groove are formed in the iron core group; a first oil inlet hole corresponding to the first oil guide groove and a second oil inlet hole corresponding to the second oil guide groove are formed in the rotating shaft; correspondingly, a first oil outlet hole capable of penetrating through the first end plate is formed in the first oil collecting groove, and a second oil outlet hole capable of penetrating through the second end plate is formed in the second oil collecting groove. According to the scheme, the structure is simple, machining is easy, cost is low, the rotor can be effectively cooled, and then the magnetic steel is effectively protected.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle motors, in particular to an oil-cooled motor rotor structure. Background Art

[0002] The motor plays a vital role in new energy vehicles. It is one of the key structures that distinguish new energy vehicles from traditional fuel vehicles, and it is also the core component for new energy vehicles to obtain forward momentum. Specifically, the role of the motor is mainly reflected in the following aspects: 1. Driving the vehicle forward: The motor converts electrical energy into mechanical energy to drive the tires of the new energy vehicle to rotate, thereby propelling the vehicle forward. 2. Determining vehicle performance: The performance of the motor directly determines the load capacity, acceleration ability, climbing ability and maximum speed of the new energy vehicle. These performance parameters are important indicators for measuring the quality of new energy vehicles, and the motor is the key factor in determining these parameters. 3. Influencing energy consumption and driving range: The motor affects the energy consumption and driving range of the whole vehicle of new energy vehicles to a certain extent. The higher the efficiency of the motor, the lower the energy consumption of the whole vehicle, so that under the same battery capacity, the driving range of the new energy vehicle will also increase accordingly.

[0003] In summary, the motor plays a pivotal role in new energy vehicles, affecting not only the performance and energy consumption of the vehicle, but also the overall competitiveness and market acceptance of new energy vehicles. This poses a great challenge to motor cooling, among which the cooling of the rotor is often neglected. If the rotor temperature is too high, it will lead to demagnetization of the rotor magnet, performance degradation, motor failure, and reduced reliability.

[0004] Therefore, a new technical solution is urgently needed to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the above-mentioned problems of the prior art and provide an oil-cooled motor rotor structure for solving the technical problem that the existing rotor temperature is too high, which will lead to demagnetization of the rotor magnet, performance degradation, motor failure and reduced reliability.

[0006] The above objectives are achieved through the following technical solutions:

[0007] An oil-cooled motor rotor structure comprises a hollow rotating shaft, and an iron core group sleeved on the outer side of the rotating shaft, wherein a magnetic steel is arranged in the iron core group, and a first end plate and a second end plate are sleeved on both sides of the rotating shaft, and the inner wall of the first end plate and the inner wall of the second end plate are respectively in contact with the outer wall of the iron core group;

[0008] The inner wall of the first end plate is provided with a first oil guide groove and a first oil collecting groove;

[0009] The inner wall of the second end plate is provided with a second oil guide groove and a second oil collecting groove;

[0010] The core group is provided with a first core oil path that can connect the first oil guide groove with the second oil collection groove, and a second core oil path that can connect the second oil guide groove with the first oil collection groove;

[0011] The rotating shaft is provided with a first oil inlet hole corresponding to the first oil guide groove, and a second oil inlet hole corresponding to the second oil guide groove;

[0012] Correspondingly, a first oil outlet hole capable of penetrating the first end plate is formed in the first oil collecting groove, and a second oil outlet hole capable of penetrating the second end plate is formed in the second oil collecting groove.

[0013] Furthermore, the core group includes a plurality of core punching sheets of the same specification, the core punching sheets include a core through hole arranged at the axis center position, and the core through hole is used to sleeve the rotating shaft;

[0014] A plurality of magnetic steel clamping grooves are arranged on the iron core punching sheet with the iron core through hole as the center of the circle, and the magnetic steel is arranged in the magnetic steel clamping groove;

[0015] A plurality of iron core deweighting holes are also arranged between the magnetic steel clamping groove and the iron core through hole, and the iron core deweighting holes are arranged in a circle with the iron core through hole as the center.

[0016] Furthermore, there are 4 core punching sheets.

[0017] Furthermore, the core deweighting holes on the core punching sheets correspond to each other, forming the first core oil path connecting the first oil guide groove and the second oil collecting groove, and the second core oil path connecting the second oil guide groove and the first oil collecting groove.

[0018] Further, the first core oil circuits have 4 and the second core oil circuits have 4;

[0019] Correspondingly, there are two first oil guide grooves, and each of the first oil guide grooves corresponds to two first iron core oil paths;

[0020] There are two second oil guide grooves, and each of the second oil guide grooves corresponds to two second iron core oil passages;

[0021] There are two first oil collecting grooves, and each of the first oil collecting grooves corresponds to two second core oil passages;

[0022] There are two second oil collecting grooves, and each of the second oil collecting grooves corresponds to two first iron core oil circuits.

[0023] Furthermore, the two first oil guide grooves are symmetrically arranged about the rotating shaft axis, and the two second oil guide grooves are symmetrically arranged about the rotating shaft axis; the two first oil collecting grooves are symmetrically arranged about the rotating shaft axis, and the two second oil collecting grooves are symmetrically arranged about the rotating shaft axis.

[0024] Further, the first oil guide groove is T-shaped, and includes a first oil guide groove oil outlet portion for communicating with the first core oil path, and a first oil guide groove oil guide portion for connecting the first oil guide groove oil outlet portion with the first oil inlet hole;

[0025] Correspondingly, the second oil guiding groove is T-shaped, including a second oil guiding groove oil outlet portion for communicating with the second core oil circuit, and a second oil guiding groove oil guiding portion for connecting the second oil guiding groove oil outlet portion with the second oil inlet hole.

[0026] Furthermore, the oil guiding portion of the first oil guiding groove and the oil guiding portion of the second oil guiding groove are both inclined grooves.

[0027] Furthermore, the first oil collecting tank is T-shaped, and comprises a first oil collecting tank oil guide portion for communicating with the second core oil path, and the first oil outlet hole arranged at the axial center position of the first oil collecting tank oil guide portion;

[0028] Correspondingly, the second oil collecting tank is T-shaped, including a second oil collecting tank oil guide portion for communicating with the first core oil path, and the second oil outlet hole arranged at the axial center position of the second oil collecting tank oil guide portion.

[0029] Furthermore, a limiting sliding groove is arranged on the outer wall of the rotating shaft, and correspondingly, limiting protrusions matching the limiting sliding groove are arranged on the first end plate, the core group and the second end plate.

[0030] The utility model provides an oil-cooled motor rotor structure, which combines the rotor shaft, two rotor end plates, and the rotor punching deweighting holes to form forward and reverse oil circuits, thereby effectively cooling the rotor, reducing cooling costs, and improving motor reliability. This solution is not only simple in structure, easy to process, and low in cost, but can effectively cool the rotor and effectively protect the magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram from a first perspective of an oil-cooled motor rotor structure according to the utility model;

[0032] Figure 2 This is a schematic structural diagram from a second viewing angle of an oil-cooled motor rotor structure according to the utility model;

[0033] Figure 3 This is an exploded view from a first perspective of an oil-cooled motor rotor structure described in the utility model;

[0034] Figure 4 This is an exploded view from a second perspective of an oil-cooled motor rotor structure according to the utility model;

[0035] Figure 5 This is a schematic diagram of the structure after the rotating shaft and the first end plate are assembled in the oil-cooled motor rotor structure described in the utility model;

[0036] Figure 6 This is a schematic diagram of the structure after the rotating shaft and the second end plate are assembled in the oil-cooled motor rotor structure described in the utility model;

[0037] Figure 7 The utility model is a schematic diagram of the connection between the first end plate and the iron core punching sheet in the oil-cooled motor rotor structure.

[0038] Graphic marking:

[0039] 1-rotating shaft, 101-first oil inlet hole, 102-second oil inlet hole, 103-first oil outlet hole, 104-second oil outlet hole, 105-limiting slide groove;

[0040] 2- iron core group, 201- first iron core oil circuit, 202-, 203- iron core punching sheet, 204- iron core through hole, 205- magnetic steel clamping groove, 206- iron core deweighting hole;

[0041] 3-first end plate, 301-first oil guide groove, 302-first oil collecting groove, 303-oil outlet of first oil guide groove, 304-oil guide portion of first oil guide groove;

[0042] 4-second end plate, 401-second oil guide groove, 402-second oil collecting groove, 403-oil outlet of second oil guide groove, 404-oil guide portion of second oil guide groove, 405-oil guide portion of second oil collecting groove;

[0043] 5-Magnetic steel;

[0044] 6-limiting protrusion;

[0045] 7- Tightening hoop. DETAILED DESCRIPTION

[0046] The utility model is further described in detail below based on the accompanying drawings and embodiments. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] like Figure 1 to Figure 7As shown, the present solution provides an oil-cooled motor rotor structure, comprising a hollow rotating shaft 1, and an iron core group 2 sleeved on the outer side of the rotating shaft 1, wherein a magnetic steel 5 is arranged in the iron core group 2, and characterized in that a first end plate 3 and a second end plate 4 are sleeved on both sides of the rotating shaft 1, and the inner wall of the first end plate 3 and the inner wall of the second end plate 4 are respectively fitted with the outer wall of the iron core group 2;

[0048] The inner wall of the first end plate 3 is provided with a first oil guide groove 301 and a first oil collecting groove 302;

[0049] The inner wall of the second end plate 4 is provided with a second oil guide groove 401 and a second oil collection groove 402;

[0050] The core group 2 is provided with a first core oil passage 201 that can connect the first oil guide groove 301 with the second oil collecting groove 402, and a second core oil passage 202 that can connect the second oil guide groove 401 with the first oil collecting groove 302;

[0051] The rotating shaft 1 is provided with a first oil inlet hole 101 corresponding to the first oil guide groove 301 , and a second oil inlet hole 102 corresponding to the second oil guide groove 401 ;

[0052] Correspondingly, a first oil outlet hole 103 capable of penetrating the first end plate 3 is formed in the first oil collecting groove 302, and a second oil outlet hole 104 capable of penetrating the second end plate 4 is formed in the second oil collecting groove 402;

[0053] Working principle:

[0054] The rotating shaft 1 can drive the core group 2, the first end plate 3 and the second end plate 4 to rotate synchronously;

[0055] Under the action of the rotation force, the cooling oil in the hollow cavity of the rotating shaft 1 enters the first oil guide groove 301 through the first oil inlet hole 101, and enters the second oil collecting groove 402 along the first iron core oil path 201. Under the action of the rotation force, the cooling oil is thrown outward from the second oil outlet hole 104 and recovered through the external oil collecting device for recycling.

[0056] At the same time, the cooling oil located in the hollow cavity of the rotating shaft 1 enters the second oil guide groove 401 through the second oil inlet hole 102, and enters the first oil collecting groove 302 along the second iron core oil path 202. Under the action of the rotational force, the cooling oil is thrown outward from the first oil outlet hole 103 and recovered through an external oil collecting device for recycling.

[0057] In summary, two oil paths with opposite flow directions are formed on the rotor, thereby cooling the core group 2 and indirectly cooling the magnetic steel 5 arranged in the core group 2 .

[0058] It should be noted that, in this embodiment, the outer sides of the first end plate 3 and the second end plate 4 can be fixed in various conventional ways, such as by tightening with a gold hoop 7 .

[0059] like Figure 3 and Figure 4 As shown, the core group 2 includes a plurality of core punching sheets 203 of the same specification, and the core punching sheets 203 include a core through hole 204 arranged at the axis position, and the core through hole 204 is used to sleeve the rotating shaft 1;

[0060] A plurality of magnetic steel clamping grooves 205 are arranged on the iron core punching sheet 203 with the iron core through hole 204 as the center of the circle, and the magnetic steel 5 is arranged in the magnetic steel clamping grooves 205;

[0061] A plurality of iron core de-weighting holes 206 are further provided between the magnetic steel clamping groove 205 and the iron core through hole 204 , and the iron core de-weighting holes 206 are arranged in a circle with the iron core through hole 204 as the center.

[0062] As a specific embodiment of the present solution, there are four core punching sheets 203 .

[0063] In this embodiment, the core deweighting holes 206 on each core punching sheet correspond to each other, forming the first core oil path 201 for connecting the first oil guide groove 301 with the second oil collecting groove 402, and the second core oil path 202 for connecting the second oil guide groove 401 with the first oil collecting groove 302.

[0064] There are four first core oil passages 201 and four second core oil passages 202;

[0065] Correspondingly, there are two first oil guide grooves 301, and each of the first oil guide grooves 301 corresponds to two first core oil passages 201;

[0066] There are two second oil guide grooves 401, and each second oil guide groove 401 corresponds to two second core oil passages 202;

[0067] There are two first oil collecting grooves 302, and each of the first oil collecting grooves 302 corresponds to two second core oil passages 202;

[0068] There are two second oil collecting grooves 402 , and each of the second oil collecting grooves 402 corresponds to two first core oil passages 201 .

[0069] like Figure 5 and Figure 6 As shown, in this embodiment, the two first oil guide grooves 301 are symmetrically arranged about the rotating shaft 1, and the two second oil guide grooves 401 are symmetrically arranged about the rotating shaft 1; the two first oil collecting grooves 302 are symmetrically arranged about the rotating shaft 1, and the two second oil collecting grooves 402 are symmetrically arranged about the rotating shaft 1.

[0070] Specifically, under this structure, the first oil guide groove 301 and the first oil collecting groove 302 adjacent to each other on the first end plate 3 form an angle of 90°, and correspondingly, the second oil guide groove 401 and the second oil collecting groove 402 adjacent to each other on the second end plate 4 form an angle of 90°.

[0071] Under the above structure, 8 oil circuits are formed, including:

[0072] Four forward oil paths formed by two of the first oil guide grooves 301, four of the first core oil paths 201, and two of the second oil collecting grooves 402;

[0073] Four reverse oil paths are formed by two of the second oil guide grooves 401 , four of the second core oil paths 202 , and two of the first oil collecting grooves 302 .

[0074] It should be noted that the forward oil circuit and the reverse oil circuit described in this embodiment are only used to indicate that the cooling oil flows in opposite directions. Under this structure, the heat of the rotor itself can be taken away more effectively, and as the temperature of the rotor at the shaft portion decreases, the high temperature of the rest of the core group 2 will be conducted to the low temperature area under the effect of heat conduction, thereby achieving the cooling of the core group 2 as a whole, and indirectly achieving the cooling of the magnetic steel 5 installed on the core group 2.

[0075] In this embodiment, the first oil guide groove 301 is T-shaped, and includes a first oil guide groove oil outlet portion 303 for communicating with the first core oil path 201, and a first oil guide groove oil guide portion 304 for connecting the first oil guide groove oil outlet portion 303 with the first oil inlet hole 101;

[0076] Correspondingly, the second oil guiding groove 401 is T-shaped, including a second oil guiding groove oil outlet portion 403 for communicating with the second core oil path 202 , and a second oil guiding groove oil guiding portion 404 for connecting the second oil guiding groove oil outlet portion 403 with the second oil inlet hole 102 .

[0077] In this embodiment, both the first oil guiding groove oil guiding portion 304 and the second oil guiding groove oil guiding portion 404 are inclined grooves, that is, the bottom side of the inclined groove tends to the oil inlet hole on the rotating shaft 1, and the upper side of the inclined groove is connected to the first oil guiding groove oil guiding portion 304 or the second oil guiding groove oil guiding portion 404.

[0078] In addition, the first oil collecting tank 302 is T-shaped, including a first oil collecting tank oil guide portion 305 for communicating with the second core oil passage 202, and the first oil outlet hole 103 disposed at the axial center of the first oil collecting tank oil guide portion 305;

[0079] Correspondingly, the second oil collecting groove 402 is T-shaped, including a second oil collecting groove oil guide portion 405 for communicating with the first core oil path 201 , and the second oil outlet hole 104 arranged at the axial center position of the second oil collecting groove oil guide portion 405 .

[0080] Specifically, in this embodiment, the first oil outlet hole 103 and the second oil outlet hole 104 are used to throw the cooling oil received in the oil circuit outward under the action of the rotational force, and recover it through an external oil collection device for recycling.

[0081] In order to ensure that the rotating shaft 1 can drive the first end plate 3, the core group 1 and the second end plate 4 to rotate synchronously, a limiting groove 105 is provided on the outer wall of the rotating shaft 1, and correspondingly, a limiting protrusion 6 matching the limiting groove 105 is provided on the first end plate 3, the core group 2 and the second end plate 4; under this structure, not only can the quick assembly or disassembly between the four be ensured, but also the synchronous rotation can be effectively ensured.

[0082] The above description is only for illustrating the implementation mode of the present invention and is not intended to limit the present invention. For those skilled in the art, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-cooled motor rotor structure, comprising a hollow rotating shaft (1), and an iron core group (2) sleeved on the outside of the rotating shaft (1), wherein a magnetic steel (5) is arranged in the iron core group (2), characterized in that: A first end plate (3) and a second end plate (4) are respectively sleeved on both sides of the rotating shaft (1), and the inner wall of the first end plate (3) and the inner wall of the second end plate (4) are respectively in contact with the outer wall of the core assembly (2); A first oil guide groove (301) and a first oil collecting groove (302) are provided on the inner wall of the first end plate (3); A second oil guide groove (401) and a second oil collecting groove (402) are provided on the inner wall of the second end plate (4); The iron core group (2) is provided with a first iron core oil path (201) capable of connecting the first oil guide groove (301) with the second oil collecting groove (402), and a second iron core oil path (202) capable of connecting the second oil guide groove (401) with the first oil collecting groove (302); The rotating shaft (1) is provided with a first oil inlet hole (101) corresponding to the first oil guide groove (301), and a second oil inlet hole (102) corresponding to the second oil guide groove (401); Correspondingly, a first oil outlet hole (103) capable of penetrating the first end plate (3) is provided in the first oil collecting groove (302), and a second oil outlet hole (104) capable of penetrating the second end plate (4) is provided in the second oil collecting groove (402).

2. The oil-cooled motor rotor structure according to claim 1, characterized in that: The iron core group (2) comprises a plurality of iron core punching sheets (203) of the same specification, the iron core punching sheets (203) comprising an iron core through hole (204) arranged at the axis center position, and the iron core through hole (204) is used for sleeve-mounting the rotating shaft (1); A plurality of magnetic steel clamping grooves (205) are arranged on the circumference of the iron core punching sheet (203) with the iron core through hole (204) as the center, and the magnetic steel (5) is arranged in the magnetic steel clamping groove (205); A plurality of iron core deweighting holes (206) are also provided between the magnetic steel clamping groove (205) and the iron core through hole (204), and the iron core deweighting holes (206) are arranged in a circle with the iron core through hole (204) as the center.

3. The oil-cooled motor rotor structure according to claim 2, characterized in that: There are four iron core punching sheets (203).

4. An oil-cooled motor rotor structure according to claim 2 or 3, characterized in that: The core deweighting holes (206) on the core punching sheets correspond to each other, forming the first core oil path (201) for connecting the first oil guide groove (301) and the second oil collecting groove (402), and the second core oil path (202) for connecting the second oil guide groove (401) and the first oil collecting groove (302).

5. The oil-cooled motor rotor structure according to claim 3, characterized in that: There are four first iron core oil circuits (201) and four second iron core oil circuits (202); Correspondingly, there are two first oil guide grooves (301), and each of the first oil guide grooves (301) corresponds to two first iron core oil paths (201); There are two second oil guide grooves (401), and each second oil guide groove (401) corresponds to two second iron core oil passages (202); There are two first oil collecting grooves (302), and each of the first oil collecting grooves (302) corresponds to two of the second iron core oil passages (202); There are two second oil collecting grooves (402), and each of the second oil collecting grooves (402) corresponds to two first iron core oil passages (201).

6. The oil-cooled motor rotor structure according to claim 5, characterized in that: The two first oil guide grooves (301) are arranged symmetrically about the axis of the rotating shaft (1), and the two second oil guide grooves (401) are arranged symmetrically about the axis of the rotating shaft (1); the two first oil collecting grooves (302) are arranged symmetrically about the axis of the rotating shaft (1), and the two second oil collecting grooves (402) are arranged symmetrically about the axis of the rotating shaft (1).

7. The oil-cooled motor rotor structure according to claim 1, characterized in that: The first oil guide groove (301) is T-shaped, comprising a first oil guide groove oil outlet portion (303) for communicating with the first iron core oil path (201), and a first oil guide groove oil guide portion (304) for connecting the first oil guide groove oil outlet portion (303) with the first oil inlet hole (101); Correspondingly, the second oil guide groove (401) is T-shaped, comprising a second oil guide groove oil outlet portion (403) for communicating with the second iron core oil path (202), and a second oil guide groove oil guide portion (404) for connecting the second oil guide groove oil outlet portion (403) with the second oil inlet hole (102).

8. The oil-cooled motor rotor structure according to claim 7, characterized in that: The first oil guide groove oil guide portion (304) and the second oil guide groove oil guide portion (404) are both inclined grooves.

9. The oil-cooled motor rotor structure according to claim 1, characterized in that: The first oil collecting groove (302) is T-shaped, comprising a first oil collecting groove oil guide portion (305) for communicating with the second iron core oil path (202), and the first oil outlet hole (103) arranged at the axial center position of the first oil collecting groove oil guide portion (305); Correspondingly, the second oil collecting groove (402) is T-shaped, comprising a second oil collecting groove oil guide portion (405) for communicating with the first iron core oil path (201), and the second oil outlet hole (104) arranged at the axial center position of the second oil collecting groove oil guide portion (405).

10. The oil-cooled motor rotor structure according to claim 9, characterized in that: A limiting slide groove (105) is provided on the outer wall of the rotating shaft (1), and correspondingly, a limiting protrusion (6) matching the limiting slide groove (105) is provided on the first end plate (3), the iron core group (2) and the second end plate (4).

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