Driving motor rotor capable of improving oil cooling effect

Abstract

The utility model discloses a driving motor rotor capable of improving oil cooling effect, which comprises a rotating shaft, an iron core and a first pressing plate, the iron core and the first pressing plate are sleeved on the peripheral surface of the rotating shaft, the rotating shaft is provided with a fixing piece, the first pressing plate is respectively clamped with the iron core and the fixing piece along the two sides of the axial direction of the rotating shaft, the rotating shaft is provided with an oil inlet hole, and the oil inlet hole is communicated with the oil inlet hole. A first oil conveying hole communicated with the oil inlet hole is formed in the peripheral surface of the rotating shaft, a first communicating hole communicated with the first oil conveying hole is formed in the first pressing plate, a first oil throwing groove communicated with the first communicating hole is formed in the side, away from the iron core, of the first pressing plate, and the width of the first oil throwing groove is gradually increased in the direction away from the first oil conveying hole. The cooling oil spraying device has the advantages that the cooling oil spraying range is large, it is guaranteed that different positions can be fully cooled, the cooling oil can make full contact with a bearing on a rotating shaft, and the lubricating effect of the cooling oil on the bearing is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of motor rotors, in particular to a drive motor rotor with improved oil cooling effect. Background Art

[0002] A motor consists of a stator and a rotor. The rotor rotates on the stator, driving the driven component to produce power. Because the motor generates heat from current flowing through it and friction from the rotor during rotation, the motor can easily overheat after prolonged high-speed operation. Therefore, motor cooling is necessary to improve the reliability of the motor during long-term high-speed operation.

[0003] The Chinese invention patent application document with publication number CN116073564A discloses a structure for oil supply and bearing lubrication of a motor rotor. The outer bearing, which is conventionally interference-fitted on the shaft, is repositioned to fit inside the shaft, and the bearing support is changed from the shaft to the outer shell. This simplifies the complex outer shell oil passage, and the bearing also functions as an oil seal, eliminating the oil seal. The non-drive end bearing is fitted with the inner ring of the rotor shaft, replacing the oil inlet nozzle, which also extends the bearing's service life. The outer shell oil passage is simplified into an L-shape to directly supply oil to the inner hole of the rotor shaft. The simplified oil passage reduces flow resistance, increases flow rate, and increases the oil supply per unit time, resulting in better cooling effect. A stepped maze structure is added to the shaft to reduce the amount of cooling oil leaking under centrifugal force. At the same time, two notches are added to enhance the lubrication and cooling effect of the bearing. The rotor bearing is simultaneously lubricated with cooling oil, eliminating the conventional oil seal structure. The bearing also functions as an oil seal, reducing parts and lowering costs.

[0004] In the existing motor rotor shaft, cooling oil is sprayed through the oil hole. Due to the small width of the oil hole, the cooling oil is sprayed over a small area, which cannot fully cool and dissipate heat. Therefore, the existing technology has the problem of too small a cooling oil spraying area. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a driving motor rotor with improved oil cooling effect, which includes a rotating shaft, an iron core, and a first pressure plate. The driving motor rotor with improved oil cooling effect has the advantages of...

[0006] In order to achieve the above-mentioned purpose of the utility model, the technical solution adopted by the utility model is as follows:

[0007] A driving motor rotor for improving oil cooling effect includes a rotating shaft, an iron core, and a first pressure plate. The iron core and the first pressure plate are both sleeved on the outer peripheral surface of the rotating shaft. The rotating shaft is equipped with a fixing piece. The first pressure plate is respectively engaged with the iron core and the fixing piece on both sides of the axial direction of the rotating shaft. The rotating shaft is provided with an oil inlet hole. The outer peripheral surface of the rotating shaft is provided with a first oil delivery hole connected to the oil inlet hole. The first pressure plate is provided with a first connecting hole connected to the first oil delivery hole. The first pressure plate is provided with a first oil-spinning groove connected to the first connecting hole on the side away from the iron core. The width of the first oil-spinning groove gradually increases in the direction away from the first oil delivery hole.

[0008] This arrangement increases the oil-splitting range of the first and second oil-splitting troughs, allowing the cooling oil to be spread to different locations, achieving the advantage of a wider cooling oil spraying range. This ensures that all locations are adequately cooled and that the cooling oil fully contacts the bearings on the rotating shaft, ensuring the cooling oil's lubrication effect on the bearings.

[0009] Preferably, the rotating shaft is provided with a second pressing plate, and the second pressing plate is clamped to a side of the iron core away from the first pressing plate.

[0010] Through such an arrangement, the first pressing plate and the second pressing plate can clamp and fix the iron core.

[0011] Preferably, the rotating shaft is provided with a second oil delivery hole connected to the oil inlet hole, the second pressure plate is provided with a second connecting hole connected to the second oil delivery hole, and the second pressure plate is provided with a second oil-swinging groove connected to the second connecting hole on the side away from the iron core, and the width of the second oil-swinging groove gradually increases in the direction away from the second oil delivery hole.

[0012] Through such an arrangement, the advantage of a wider cooling oil spraying range is achieved.

[0013] Preferably, a second inclined surface is provided on a side of the second oil-swing groove close to the iron core, and an end of the second inclined surface away from the rotating shaft is inclined in a direction away from the iron core.

[0014] Through such an arrangement, the spraying range of the cooling oil is increased.

[0015] Preferably, a first inclined surface is provided on a side of the first oil-swing groove close to the iron core, and an end of the first inclined surface away from the rotating shaft is inclined in a direction away from the iron core.

[0016] Through such an arrangement, the spraying range of the cooling oil is increased.

[0017] Preferably, a plurality of the first oil delivery holes, the first connecting holes and the first oil-spinning grooves are provided, and the plurality of the first oil delivery holes, the first connecting holes and the first oil-spinning grooves correspond to each other one by one, and the plurality of the first oil-spinning grooves are evenly distributed around the circumference of the rotating shaft.

[0018] Through such an arrangement, the cooling and lubrication effects on the bearings are further improved.

[0019] Preferably, a plurality of the second oil delivery holes, second connecting holes and second oil-spinning grooves are provided, and the plurality of the second oil delivery holes, second connecting holes and second oil-spinning grooves correspond to each other one by one, and the plurality of the second oil-spinning grooves are evenly distributed around the circumference of the rotating shaft.

[0020] Through such an arrangement, the cooling and lubrication effects on the bearings are further improved.

[0021] Preferably, the rotating shaft is provided with a keyway extending along the axial direction of the rotating shaft, the first pressure plate is fixedly connected with a first sliding key which is engaged in the keyway, the second pressure plate is fixedly connected with a second sliding key which is engaged in the keyway, the iron core is provided with a third sliding key which is fixedly connected with the keyway, the keyway is connected to one end of the rotating shaft, the rotating shaft is fixedly connected with a shaft shoulder, and the shaft shoulder is engaged with the side of the second pressure plate away from the iron core.

[0022] Through such an arrangement, synchronous rotation of the rotating shaft, the second pressing plate, the iron core and the first pressing plate is achieved.

[0023] Preferably, the iron core is provided with an oil hole, and both ends of the oil hole are connected to the first connecting hole and the second connecting hole respectively.

[0024] Through such an arrangement, cooling and heat dissipation inside the iron core are achieved.

[0025] Preferably, the oil hole is communicated with the outer peripheral surface of the rotating shaft, and the oil hole extends along the axial direction of the rotating shaft.

[0026] Through such an arrangement, the cooling effect of the rotating shaft is further ensured.

[0027] Compared with the existing technology, the present invention has achieved beneficial technical effects:

[0028] Cooling oil is injected into the oil inlet and enters the first oil-slinging trough through the first oil delivery hole and the first connecting hole. As the first pressure plate rotates with the rotating shaft, the cooling oil in the first oil-slinging trough moves away from the rotating shaft due to centrifugal force, causing the cooling oil to be ejected from the end of the first oil-slinging trough away from the rotating shaft. Because the width of the first oil-slinging trough gradually increases as it moves away from the first oil delivery hole, the cooling oil can be ejected from the wider end of the first oil-slinging trough, thereby increasing the oil-slinging range of the first oil-slinging trough, allowing the cooling oil to be sprayed to different locations, achieving the advantage of a wider cooling oil spray range. This ensures that different locations are adequately cooled and that the cooling oil fully contacts the bearings on the rotating shaft, ensuring the cooling oil's lubrication effect on the bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a drive motor rotor for improving oil cooling effect in an embodiment of the utility model;

[0030] Figure 2 This is a structural diagram of the first pressing plate in an embodiment of the present utility model;

[0031] Figure 3 This is a structural diagram of the second pressing plate in an embodiment of the present utility model;

[0032] Figure 4 It is a structural schematic diagram of the iron core in an embodiment of the present utility model.

[0033] The technical features indicated by the reference numerals are as follows:

[0034] 11. Rotating shaft; 12. Fixing part; 13. Oil inlet hole; 14. First oil delivery hole; 15. Second oil delivery hole; 16. Keyway; 17. Shoulder; 18. Bearing; 21. Iron core; 22. Third sliding key; 23. Oil through hole; 31. First pressure plate; 32. First connecting hole; 33. First oil-spinning groove; 34. First inclined surface; 35. First sliding key; 41. Second pressure plate; 42. Second connecting hole; 43. Second oil-spinning groove; 44. Second inclined surface; 45. Second sliding key. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments, but the scope of protection claimed in the present invention is not limited to the following specific embodiments.

[0036] refer to Figure 1-4A drive motor rotor for improving oil cooling performance includes a rotating shaft 11, an iron core 21, and a first pressure plate 31. The iron core 21 and the first pressure plate 31 are both sleeved on the outer circumference of the rotating shaft 11. The rotating shaft 11 is mounted with a fixing member 12. The first pressure plate 31 is respectively engaged with the iron core 21 and the fixing member 12 on both sides of the axial direction of the rotating shaft 11. The rotating shaft 11 is mounted with a second pressure plate 41. The second pressure plate 41 is engaged with the side of the iron core 21 away from the first pressure plate 31. The first pressure plate 31 and the second pressure plate 41 clamp and fix the iron core 21. The rotating shaft 11 is provided with a keyway 16 extending axially along the rotating shaft 11, the first pressure plate 31 is fixedly connected with a first sliding key 35 that is engaged with the keyway 16, the second pressure plate 41 is fixedly connected with a second sliding key 45 that is engaged with the keyway 16, the iron core 21 is provided with a third sliding key 22 that is fixedly connected with the keyway 16, the keyway 16 is connected to one end of the rotating shaft 11, the rotating shaft 11 is fixedly connected with a shaft shoulder 17, and the shaft shoulder 17 is engaged with the side of the second pressure plate 41 away from the iron core 21. During the installation of the second pressure plate 41, the iron core 21 and the first pressure plate 31, the second sliding key 45, the third sliding key 22 and the first sliding key 35 are aligned with the key groove 16 respectively, and then the second sliding key 45, the third sliding key 22 and the first sliding key 35 are inserted into the key groove 16, thereby realizing the circumferential clamping of the rotating shaft 11 with the second pressure plate 41, the iron core 21 and the first pressure plate 31, and realizing the synchronous rotation of the rotating shaft 11, the second pressure plate 41, the iron core 21 and the first pressure plate 31.

[0037] The rotating shaft 11 has an oil inlet 13. A first oil delivery hole 14 is formed on its outer circumference, communicating with the oil inlet 13. A first connecting hole 32 is formed on the first pressure plate 31, communicating with the first oil delivery hole 14. A first oil slinging groove 33 is formed on the side of the first pressure plate 31 facing away from the iron core 21, communicating with the first connecting hole 32. The first oil slinging groove 33 gradually increases in width as it moves away from the first oil delivery hole 14. The rotating shaft 11 has a second oil delivery hole 15 communicating with the oil inlet 13. A second connecting hole 42 is formed on the second pressure plate 41, communicating with the second connecting hole 42. A second oil slinging groove 43 gradually increases in width as it moves away from the second oil delivery hole 15. The rotating shaft 11 is mounted with two bearings 18, with the first and second oil slinging grooves 33 and 43 located between the two bearings 18.

[0038] A first inclined surface 34 is provided on the side of the first oil-swing trough 33 near the iron core 21. The first inclined surface 34 is inclined in a direction away from the iron core 21 at the end away from the rotating shaft 11. The first inclined surface 34 guides the cooling oil in the first oil-swing trough 33 to be sprayed away from the iron core 21, allowing the cooling oil to move to a farther position, thereby increasing the cooling oil spraying range. A second inclined surface 44 is provided on the side of the second oil-swing trough 43 near the iron core 21. The second inclined surface 44 is inclined in a direction away from the iron core 21 at the end away from the rotating shaft 11. The second inclined surface 44 guides the cooling oil in the second oil-swing trough 43 to be sprayed away from the iron core 21, allowing the cooling oil to move to a farther position, thereby increasing the cooling oil spraying range.

[0039] Multiple first oil delivery holes 14, first connecting holes 32, and first oil-slinging grooves 33 are provided. These multiple first oil delivery holes 14, first connecting holes 32, and first oil-slinging grooves 33 correspond one-to-one, and the multiple first oil-slinging grooves 33 are evenly distributed around the rotating shaft 11. By simultaneously spraying cooling oil through multiple first oil-slinging grooves 33, the amount of cooling oil sprayed can be increased, further improving the cooling and lubrication effects on the bearing 18. Multiple second oil delivery holes 15, second connecting holes 42, and second oil-slinging grooves 43 are provided. These multiple second oil delivery holes 15, second connecting holes 42, and second oil-slinging grooves 43 correspond one-to-one, and the multiple second oil-slinging grooves 43 are evenly distributed around the rotating shaft 11. By simultaneously spraying cooling oil through multiple second oil-slinging grooves 43, the amount of cooling oil sprayed can be increased, further improving the cooling and lubrication effects on the bearing 18.

[0040] The iron core 21 is provided with an oil hole 23, the ends of which are connected to the first and second connecting holes 32 and 42, respectively. Cooling oil within the first and second connecting holes 32 and 42 can flow into the oil hole 23, where it absorbs heat from the iron core 21, thereby cooling and dissipating heat within the iron core 21. The oil hole 23 is connected to the outer circumference of the rotating shaft 11 and extends axially along the rotating shaft 11. The cooling oil within the oil hole 23 can absorb heat from the rotating shaft 11 at the iron core 21, further ensuring effective cooling of the rotating shaft 11.

[0041] The fixing member 12 is a locking nut threadedly connected to the rotating shaft 11. Tightening the fixing member 12 forces it against the first pressure plate 31. The fixing member 12 and the shaft shoulder 17 respectively clamp the first pressure plate 31 and the second pressure plate 41, thereby clamping the ends of the iron core 21 through the first pressure plate 31 and the second pressure plate 41, thereby securing the pressure plates and the iron core 21. A permanent magnet is installed inside the iron core 21. By generating an electromagnetic field around the iron core 21, the electromagnetic field drives the permanent magnet and the iron core 21, driving the rotating shaft 11 to rotate.

[0042] This embodiment has the following advantages:

[0043] Cooling oil is injected into the oil inlet and enters the first oil-swinging groove 33 through the first oil delivery hole 14 and the first connecting hole 32. As the first pressure plate 31 rotates with the rotating shaft 11, the cooling oil in the first oil-swinging groove 33 moves away from the rotating shaft 11 due to centrifugal force, causing the cooling oil to be ejected from the end of the first oil-swinging groove 33 away from the rotating shaft 11. Because the width of the first oil-swinging groove 33 gradually increases as it moves away from the first oil delivery hole 14, the cooling oil is ejected from the wider end of the first oil-swinging groove 33, thereby increasing the oil-swinging range of the first oil-swinging groove 33. This allows the cooling oil to be sprayed to different locations, achieving the advantage of a wider cooling oil spraying range. This ensures that different locations are adequately cooled and that the cooling oil fully contacts the bearing 18 on the rotating shaft 11, ensuring that the cooling oil effectively lubricates the bearing 18.

[0044] The cooling oil in the oil inlet enters the second oil-swing trough 43 through the second oil delivery hole 15 and the second connecting hole 42. As the second pressure plate 41 rotates with the rotating shaft 11, the cooling oil in the second oil-swing trough 43 moves away from the rotating shaft 11 due to centrifugal force, causing the cooling oil to be ejected from the end of the second oil-swing trough 43 away from the rotating shaft 11. Because the width of the second oil-swing trough 43 gradually increases as it moves away from the second oil delivery hole 15, the cooling oil can be ejected from the wider end of the second oil-swing trough 43, thereby increasing the oil-swinging range of the second oil-swing trough 43, thereby distributing the cooling oil to different locations and achieving the advantage of a wider cooling oil spraying range.

[0045] The cooling oil is sprayed onto both sides of the iron core 21 simultaneously through the first oil-spinning groove 33 and the second oil-spinning groove 43 , thereby increasing the spraying range of the cooling oil and achieving the advantage of a larger cooling oil spraying range.

[0046] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are for convenience only and do not constitute any limitation on the present invention.

Claims

1. A drive motor rotor with improved oil cooling effect, characterized by: The invention comprises a rotating shaft (11), an iron core (21), and a first pressing plate (31). The iron core (21) and the first pressing plate (31) are both sleeved on the outer peripheral surface of the rotating shaft (11). The rotating shaft (11) is installed with a fixing member (12). The first pressing plate (31) is respectively engaged with the iron core (21) and the fixing member (12) on both sides of the axial direction of the rotating shaft (11). The rotating shaft (11) is provided with an oil inlet hole (13). The outer peripheral surface of the rotating shaft (11) is provided with a first oil delivery hole (14) connected to the oil inlet hole (13). The first pressing plate (31) is provided with a first communicating hole (32) connected to the first oil delivery hole (14). A first oil-spinning groove (33) connected to the first communicating hole (32) is provided on a side of the first pressing plate (31) away from the iron core (21). The width of the first oil-spinning groove (33) gradually increases in a direction away from the first oil delivery hole (14).

2. The drive motor rotor with improved oil cooling effect according to claim 1, characterized in that: The rotating shaft (11) is provided with a second pressing plate (41), and the second pressing plate (41) is clamped to a side of the iron core (21) away from the first pressing plate (31).

3. The drive motor rotor with improved oil cooling effect according to claim 2, characterized in that: The rotating shaft (11) is provided with a second oil delivery hole (15) connected to the oil inlet hole (13); the second pressure plate (41) is provided with a second communication hole (42) connected to the second oil delivery hole (15); a second oil-spinning groove (43) connected to the second communication hole (42) is provided on a side of the second pressure plate (41) away from the iron core (21); the width of the second oil-spinning groove (43) gradually increases in a direction away from the second oil delivery hole (15).

4. The drive motor rotor with improved oil cooling effect according to claim 3, characterized in that: A second inclined surface (44) is provided on a side of the second oil-swing groove (43) close to the iron core (21), and an end of the second inclined surface (44) away from the rotating shaft (11) is inclined in a direction away from the iron core (21).

5. The drive motor rotor with improved oil cooling effect according to claim 1, characterized in that: A first inclined surface (34) is provided on a side of the first oil-swing groove (33) close to the iron core (21), and an end of the first inclined surface (34) away from the rotating shaft (11) is inclined in a direction away from the iron core (21).

6. The drive motor rotor with improved oil cooling effect according to claim 1, characterized in that: A plurality of the first oil delivery holes (14), the first communicating holes (32) and the first oil-spinning grooves (33) are provided. The plurality of the first oil delivery holes (14), the first communicating holes (32) and the first oil-spinning grooves (33) correspond to each other one by one. The plurality of the first oil-spinning grooves (33) are evenly distributed around the circumference of the rotating shaft (11).

7. The drive motor rotor with improved oil cooling effect according to claim 3, characterized in that: A plurality of the second oil delivery holes (15), the second communicating holes (42) and the second oil-spinning grooves (43) are provided, and the plurality of the second oil delivery holes (15), the second communicating holes (42) and the second oil-spinning grooves (43) correspond to each other one by one. The plurality of the second oil-spinning grooves (43) are evenly distributed around the circumference of the rotating shaft (11).

8. The drive motor rotor with improved oil cooling effect according to claim 3, characterized in that: The rotating shaft (11) is provided with a keyway (16) extending axially along the rotating shaft (11); the first pressure plate (31) is fixedly connected with a first sliding key (35) snapped into the keyway (16); the second pressure plate (41) is fixedly connected with a second sliding key (45) snapped into the keyway (16); the iron core (21) is provided with a third sliding key (22) fixedly connected with the keyway (16); the keyway (16) is connected to one end of the rotating shaft (11); the rotating shaft (11) is fixedly connected with a shaft shoulder (17); the shaft shoulder (17) is snapped into the side of the second pressure plate (41) away from the iron core (21).

9. The driving motor rotor with improved oil cooling effect according to claim 3, characterized in that: The iron core (21) is provided with an oil through hole (23), and both ends of the oil through hole (23) are respectively connected to the first communicating hole (32) and the second communicating hole (42).

10. The driving motor rotor with improved oil cooling effect according to claim 9, characterized in that: The oil hole (23) is in communication with the outer peripheral surface of the rotating shaft (11), and the oil hole (23) extends along the axial direction of the rotating shaft (11).

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