Oil cooling motor structure

Abstract

The invention discloses an oil-cooled motor structure, and relates to the technical field of motor cooling, the oil-cooled motor structure comprises a shell, a driving shaft, a rotor body, an oil guide ring and a conveying structure, the driving shaft is rotatably installed on the shell, the rotor body is provided with a hollow rotor shaft, the rotor shaft is in transmission connection with the driving shaft, and the oil guide ring is arranged in the shell. The oil guide ring is arranged on the driving shaft in a sleeving mode, the oil guide ring is arranged on the driving shaft in a sleeving mode, the oil guide ring is located at one end of the rotor shaft, an oil storage cavity is formed in the oil guide ring, and an oil outlet hole communicated with the oil storage cavity is formed in the side, facing the driving shaft, of the oil guide ring. The cooling oil conveying device is used for conveying cooling oil to the position between the driving shaft and the rotor shaft. The cooling oil is conveyed between the driving shaft and the rotor shaft through cooperation of the conveying structure and the oil guide ring, so that the cooling oil is in direct contact with the interior of the rotor body, the interior of the rotor body is cooled more rapidly, and the temperature of the rotor magnetic steel is rapidly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of motor cooling, and in particular to an oil-cooling motor structure. Background Art

[0002] In the powertrain system of new energy vehicles, electric drive systems are increasingly using oil cooling systems, which can improve the heat dissipation performance of the motor and improve the efficiency of the assembly. The common electric drive assembly lubrication method on the market is generally to use an oil pump and a pipeline to transport the lubricating oil to the positions of the motor and reducer that need lubrication.

[0003] Cooling oil is generally delivered to both ends of the stator winding to cool the heat source, but the actual temperature requirement is stringent on the motor rotor magnet. The rotor magnet will demagnetize when the temperature reaches 150 to 200 degrees Celsius. The motor performance will drop sharply after demagnetization. The cooling oil is delivered to both ends of the stator winding to start cooling. When it is cooled to the rotor magnet, the rotor magnet has reached the demagnetization temperature. At this time, cooling cannot avoid the decline in motor performance. Summary of the invention

[0004] The main purpose of the present invention is to propose an oil-cooled motor structure, which aims to directly dissipate the heat of the motor rotor magnets to prevent the rotor magnets from rising to the demagnetization temperature and affecting the motor performance.

[0005] To achieve the above object, the oil-cooled motor structure proposed in the present invention includes:

[0006] case;

[0007] A drive shaft, rotatably mounted on the housing;

[0008] The rotor body has a hollow rotor shaft, the rotor shaft is drivingly connected to the drive shaft and sleeved on the drive shaft;

[0009] an oil guide ring, sleeved on the drive shaft, the oil guide ring being located at one end of the rotor shaft, the oil guide ring being provided with an oil storage cavity, and the oil guide ring being provided with an oil outlet hole communicating with the oil storage cavity on a side of the oil guide ring facing the drive shaft, so as to transport cooling oil between the drive shaft and the rotor shaft; and

[0010] A conveying structure is installed on the housing, and the conveying structure is used to convey cooling oil toward the oil storage cavity.

[0011] Preferably, a spiral groove is opened on the outer peripheral side of each driving shaft, and the spiral groove is extended in an axial spiral direction of the driving shaft. One end of the spiral groove is arranged between the rotor shaft and the driving shaft, and the other end of the spiral groove is arranged corresponding to the oil outlet hole to receive the cooling oil delivered by the oil outlet hole.

[0012] Preferably, two connecting holes for the driving shaft to pass through are formed at both ends of the rotor shaft, and the spiral groove is located in one of the connecting holes.

[0013] Preferably, a plurality of oil-swinging holes are formed in the inner cavity wall of the rotor shaft and extend to the end of the rotor body so as to transport cooling oil toward the end of the rotor body.

[0014] Preferably, the conveying structure comprises:

[0015] an oil pump, mounted on the housing, for extracting cooling oil;

[0016] A condenser is communicated with the oil pump and the oil guide ring to transport cooling oil into the oil storage cavity.

[0017] Preferably, the conveying structure further comprises a filtering device, and the filtering device is respectively connected to the oil pump and the condenser.

[0018] Preferably, the filtering device comprises a filter element, and the filter element is detachably arranged on the housing.

[0019] Preferably, the housing comprises an end cover, the end cover is rotatably mounted on one end of the drive shaft close to the oil guide ring, and a connecting assembly is provided on the end cover, and the connecting assembly is used to fix the end cover and the oil guide ring.

[0020] Preferably, the connecting assembly comprises a threaded connection member, which passes through the end cover and is threadedly connected to the oil guide ring.

[0021] Preferably, the connecting assembly further comprises a positioning member, wherein the positioning member is arranged between the end cover and the oil guide ring and is used to limit the installation position of the positioning member.

[0022] In the technical solution provided by the present invention, the rotor body has a hollow rotor shaft, the rotor shaft is transmission-connected to the drive shaft and sleeved on the drive shaft, the oil guide ring is sleeved on the drive shaft, the oil guide ring is located at one end of the rotor shaft, an oil storage cavity is provided in the oil guide ring, and an oil outlet hole connected to the oil storage cavity is provided on the side of the oil guide ring facing the drive shaft, so as to transport cooling oil toward the drive shaft and the rotor shaft, the conveying structure is installed on the shell, the conveying structure is used to transport cooling oil toward the oil storage cavity, and the cooling oil is transported to between the drive shaft and the rotor shaft through the cooperation of the conveying structure and the oil guide ring, so that the cooling oil directly contacts the inside of the rotor body, thereby cooling the inside of the rotor body more quickly, and then quickly reducing the temperature of the rotor magnet, and avoiding demagnetization caused by excessive temperature rise of the rotor magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A three-dimensional schematic diagram of an embodiment of an oil-cooled motor structure provided by the present invention;

[0025] Figure 2 for Figure 1 A schematic cross-sectional view of a middle drive shaft;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of the local A in the middle;

[0027] Figure 4 for Figure 3 Schematic diagram of the structure of the middle oil guide ring.

[0028] Description of Figure Numbers:

[0029] 1. Shell; 11. End cover; 2. Drive shaft; 3. Conveying structure; 31. Oil pump; 32. Condenser; 33. Filter device; 4. Rotor body; 41. Rotor shaft; 5. Oil throwing hole; 6. Oil guide ring; 7. Spiral groove; 8. Oil storage chamber; 9. Oil outlet hole.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their 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 addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The present invention provides an oil-cooled motor structure. Figures 1 to 4 This is an embodiment of the oil-cooled motor structure provided by the present invention.

[0035] Please also read Figures 1 to 4 The oil-cooled motor structure includes a housing 1, a drive shaft 2, a rotor body 4, an oil guide ring 6 and a conveying structure 3, wherein the drive shaft 2 is rotatably mounted on the housing 1, the rotor has a hollow rotor shaft 41, the rotor shaft 41 is transmission-connected to the drive shaft 2 and sleeved on the drive shaft 2, the oil guide ring 6 is sleeved on the drive shaft 2, the oil guide ring 6 is located at one end of the rotor shaft 41, an oil storage chamber 8 is defined in the oil guide ring 6, an oil outlet hole 9 connected to the oil storage chamber 8 is defined on the side of the oil guide ring 6 facing the drive shaft 2, so as to convey cooling oil between the drive shaft 2 and the rotor shaft 41, and the conveying structure 3 is mounted on the housing 1, and the conveying structure 3 is used to convey cooling oil toward the oil storage chamber 8.

[0036] After the motor is started, the drive shaft 2 is driven to rotate through the rotor body 4. At this time, the conveying structure 3 conveys cooling oil to the oil storage chamber 8 of the oil guide ring 6. The cooling oil entering the oil storage chamber 8 will be sprayed through the oil outlet hole 9 to the position on the drive shaft 2 corresponding to the end of the rotor shaft 41. The cooling oil will enter the hollow cavity of the rotor shaft 41 through the gap between the drive shaft 2 and the rotor shaft 41. The cooling oil enters the hollow cavity of the rotor shaft 41 to cool the inside of the rotor body 4, so that the rotor magnets are exposed to the cooling oil earlier for cooling, and the rotor magnets start to cool before rising to the demagnetization temperature. The cooling oil takes away the heat released during the operation of the rotor, thereby reducing the temperature of the rotor body 4 and increasing the service life of the rotor body 4.

[0037] The function of the conveying structure 3 is to convey cooling oil into the liquid storage cavity of the oil guide ring 6, and spray it onto the drive shaft 2 through the oil outlet 9, and penetrate into the gap between the drive shaft 2 and the rotor shaft 41. The conveying structure 3 itself does not have a structure for storing cooling oil. Therefore, the conveying structure 3 also needs to be connected to the cavity for storing cooling oil, so that the conveying structure 3 can continuously convey cooling oil to the oil storage cavity 8, and can also stop conveying cooling oil at any time, to avoid the rotor body 4 not heating up when the motor is not running, and the cooling oil entering the rotor body 4 cannot be cooled, thereby reducing the waste of cooling oil.

[0038] The conveying structure 3 can use a liquid pump, one end of the liquid pump is connected to the oil storage chamber 8, and the other end is connected to the cavity for storing cooling oil. When cooling the rotor body 4, the liquid pump is started to extract the cooling oil and transport it to the oil storage chamber 8, and then sprayed between the rotor shaft 41 and the drive shaft 2 through the oil outlet hole 9, and then flows into the hollow cavity of the rotor shaft 41 to cool the inside of the rotor body 4.

[0039] Therefore, in the technical solution provided by the present invention, the rotor body 4 has a hollow rotor shaft 41, the rotor shaft 41 is transmission-connected to the drive shaft 2 and sleeved on the drive shaft 2, the oil guide ring 6 is sleeved on the drive shaft 2, the oil guide ring 6 is located at one end of the rotor shaft 41, an oil storage chamber 8 is opened in the oil guide ring 6, and an oil outlet hole 9 connected to the oil storage chamber 8 is opened on the side of the oil guide ring 6 facing the drive shaft 2, so as to transport cooling oil toward the drive shaft 2 and the rotor shaft 41, and the conveying structure 3 is installed on the housing 1, and the conveying structure 3 is used to transport cooling oil toward the oil storage chamber 8, and the cooling oil is transported to between the drive shaft 2 and the rotor shaft 41 through the cooperation of the conveying structure 3 and the oil guide ring 6, so that the cooling oil directly contacts the inside of the rotor body 4, thereby cooling the inside of the rotor body 4 more quickly, and then quickly reducing the temperature of the rotor magnet, and avoiding the demagnetization caused by excessive temperature rise of the rotor magnet.

[0040] The cooling oil is sprayed between the drive shaft 2 and the rotor shaft 41 through the oil outlet hole 9 and then penetrates into the rotor shaft 41. The efficiency is low and a large amount of cooling oil will drip from the drive shaft 2 and cause waste. Therefore, it is necessary to accelerate the rate at which the cooling oil enters the rotor shaft 41. Specifically, in an embodiment of the present invention, a spiral groove 7 is provided on the outer peripheral side of the drive shaft 2, and the spiral groove 7 is extended in an axial spiral direction of the drive shaft 2. One end of the spiral groove 7 is provided between the rotor shaft 41 and the drive shaft 2, and the other end of the spiral groove 7 is provided corresponding to the oil outlet hole 9 to receive the cooling oil delivered by the oil outlet hole 9.

[0041] One end of the spiral groove 7 is arranged corresponding to the oil outlet hole 9 on the oil guide ring 6 for receiving the cooling oil sprayed from the oil outlet hole 9, and the other end extends into the hollow cavity of the rotor shaft 41. When the drive shaft 2 rotates, the spiral groove 7 produces a pumping effect to quickly transport the cooling oil collected in the spiral groove 7 to the hollow cavity of the rotor shaft 41, so that the cooling oil sprayed into the spiral groove 7 can be quickly and massively transported to between the drive shaft 2 and the rotor shaft 41 to cool the inside of the rotor body 4, thereby avoiding the cooling oil directly sprayed on the drive shaft 2 being thrown out of the drive shaft 2 due to the centrifugal force generated when the drive shaft 2 rotates, causing waste.

[0042] An oil guide pipe can also be connected to the oil outlet hole 9 of the oil guide ring 6. The end of the oil guide pipe away from the oil guide ring 6 extends to between the drive shaft 2 and the rotor shaft 41. The diameter of the oil guide pipe is smaller than the gap between the rotor shaft 41 and the drive shaft 2, so that the rotation of the rotor shaft 41 and the drive shaft 2 will not drive the oil guide pipe to rotate. The cooling oil in the oil storage cavity 8 of the oil guide ring 6 can be directly transported into the hollow cavity of the rotor shaft 41 through the oil guide pipe to cool the inside of the rotor body 4. However, the gap between the drive shaft 2 and the rotor shaft 41 is difficult to control. Some have enough gaps, and some have very small gaps. At this time, the use of the oil guide pipe requires an extremely small pipe, which is difficult to produce and has extremely low transportation efficiency. Therefore, it is more appropriate to open a spiral groove 7.

[0043] Furthermore, two connecting holes for the drive shaft 2 to pass through are formed at both ends of the rotor shaft 41, and the spiral groove 7 is located in one of the connecting holes. The drive shaft 2 passes through from one end of the rotor shaft 41 to the other end of the rotor shaft 41, so that the rotor shaft 41 can be sleeved on the drive shaft 2, thereby forming a gap between the drive shaft 2 and the rotor shaft 41, and allowing cooling oil to enter the gap to cool the rotor shaft 41.

[0044] The rotor body 4 not only needs internal cooling to accelerate the cooling rate of the rotor magnets, but also the two ends of the rotor body 4 need to be cooled. Therefore, cooling oil needs to be transported to the two ends of the rotor for cooling. Specifically, in an embodiment of the present invention, a plurality of oil-throwing holes 5 are provided on the inner cavity wall of the rotor shaft 41 and extend to the end of the rotor body 4 for transporting cooling oil toward the end of the rotor body 4.

[0045] After the cooling oil in the oil storage chamber 8 is sprayed into the spiral groove 7 through the oil outlet hole 9, the drive shaft 2 cooperates with the spiral groove 7 to produce a pumping phenomenon during the rotation process to suck the cooling oil in the spiral groove 7 into the rotor shaft 41 and continuously move along the direction in which the spiral groove 7 extends. When transported to the oil-slinging hole 5, part of the cooling oil enters the oil-slinging hole 5 and flows along the direction in which the oil-slinging hole 5 extends to the end of the rotor body 4, thereby cooling the end of the rotor body 4.

[0046] The rotor body 4 has two ends, and one oil-slinging hole 5 can only transport cooling oil toward one end. Therefore, at least two oil-slinging holes 5 are required, extending to the two ends of the rotor body 4 respectively. When more oil-slinging holes 5 are needed, the number of oil-slinging holes 5 should be set to a multiple of two, so that each end of the rotor body 4 has the same number of oil-slinging holes 5, ensuring that the cooling efficiency at both ends is the same, thereby making the service life consumed by the two ends the same, avoiding the situation where the service life of one end of the rotor body 4 is consumed while the other end is not consumed, causing waste.

[0047] The temperature of the cooling oil will be affected by the environment. The cooling oil input into the rotor body 4 needs to ensure that its temperature is within the set temperature range to achieve the cooling function. Therefore, the cooling oil needs to be temperature-adjusted before being transported to the oil storage chamber 8. Specifically, in an embodiment of the present invention, the delivery structure 3 includes an oil pump 31 and a condenser 32. The oil pump 31 is installed on the shell 1 for extracting cooling oil. The condenser 32 is connected to the oil pump 31 and to the oil guide ring 6 to transport the cooling oil toward the oil storage chamber 8.

[0048] The oil pump 31 extracts the cooling oil and delivers it to the condenser 32. The condenser 32 adjusts the temperature of the cooling oil to the set temperature and then delivers it to the oil storage chamber 8. It is sprayed into the spiral groove 7 through the oil outlet hole 9 and then delivered to the hollow cavity of the rotor shaft 41 under the action of pump suction to cool the inside of the rotor shaft 41. At the same time, it is delivered to the two ends of the rotor body 4 through the oil throwing hole 5. At the same time, the two ends of the rotor body 4 are cooled, and the entire rotor body 4 is cooled during the operation of the motor.

[0049] The cooling oil may carry impurities during the re-delivery process. These impurities will affect the transmission effect of the rotor shaft 41 and the drive shaft 2 when transported between the rotor shaft 41 and the drive shaft 2, and will also reduce the cooling effect of the cooling oil. Therefore, it is necessary to filter out the impurities in the cooling oil to reduce the occurrence of unexpected situations. Specifically, in an embodiment of the present invention, the conveying structure 3 also includes a filtering device 33, and the filtering device 33 is respectively connected to the oil pump 31 and the condenser 32.

[0050] The cooling oil delivered to the oil storage chamber 8 is filtered through the filter device 33, so that impurities carried in the cooling oil will not be delivered to between the rotor shaft 41 and the drive shaft 2 to affect the performance of the motor. After being used for a period of time, a large amount of impurities will accumulate inside the filter device 33. These impurities will accumulate together and cause blockage, making it difficult for the oil pump 31 to deliver cooling oil to the condenser 32.

[0051] Furthermore, the filtering device 33 includes a filter element, and the filter element is detachably disposed on the housing 1 .

[0052] The filter device 33 mainly relies on the filter element to filter the impurities in the cooling oil, so the impurities filtered out are mostly accumulated on the filter element. The filter element is removed and cleaned at regular intervals, or a damaged filter element is removed and replaced.

[0053] The main function of the filter device 33 is to filter impurities in the cooling oil and to facilitate the cleaning of impurities accumulated inside. Therefore, a filter chamber with an opening can be cast on the shell 1. At the same time, this filter chamber is connected to the oil pump 31 and the condenser 32 respectively, and a filter element is installed in the filter chamber. The opening is closed with a cover body, and a sealing gasket is set between the cover body and the filter chamber to seal the gap to prevent leakage of cooling oil. The cover body and the filter chamber can be set to be threaded, which is convenient for opening the filter chamber at any time to clean the impurities inside.

[0054] The oil guide ring 6 is arranged in the shell 1, and the oil guide ring 6 does not rotate with the drive shaft 2 or the rotor shaft 41. When the oil guide ring 6 rotates with the drive shaft 2 or the rotor shaft 41, it will drive the pipeline connected to the oil storage chamber 8 to rotate. The pipeline will be tangled during the rotation, which will cause the pipeline to be torn off, making the cooling oil skewed and unable to continue to be transported to the oil storage chamber 8. Therefore, the oil guide ring 6 cannot rotate. Specifically, in an embodiment of the present invention, the shell 1 includes an end cover 11, and the end cover 11 is rotatably installed on one end of the drive shaft 2 close to the oil guide ring 6. A connecting assembly is provided on the end cover 11, and the connecting assembly is used to fix the end cover 11 and the oil guide ring 6.

[0055] When the motor is running, the drive shaft 2 drives the rotor shaft 41 to rotate, and the oil guide ring 6 is fixed to the end cover 11 by the connecting assembly on the end cover 11 and remains stationary. The conveying structure 3 continuously conveys cooling oil to the oil storage chamber 8 of the oil guide ring 6, and the cooling oil flows to the gap between the drive shaft 2 and the rotor shaft 41 through the oil outlet hole 9 for cooling. Although the end cover 11 is rotatably installed on the drive shaft 2, under the action of the connecting assembly, the oil guide ring 6 will not rotate with the rotation of the end cover 11 and the drive shaft 2, thereby ensuring that the cooling oil can be stably conveyed from the oil guide ring 6 to the part that needs cooling, avoiding the problem of pipeline entanglement and tearing caused by the rotation of the oil guide ring 6.

[0056] When designing and constructing a connection assembly, a variety of different structural compositions can be used. One of the simpler and more common methods is to use a threaded connection. Specifically, in an embodiment of the present invention, the connection assembly includes a threaded connection, which passes through the end cover 11 and is threadedly connected to the oil guide ring 6.

[0057] During the installation of the oil guide ring 6, firstly, a screw connection is required to penetrate the end cover 11, and then the oil guide ring 6 is connected to the screw connection by means of threads. In this way, the oil guide ring 6 is firmly fixed on the end cover 11. Next, the inner ring part of the oil guide ring 6 is put on the drive shaft 2 to ensure that the drive shaft 2 and the end cover 11 can be rotatably connected. Finally, the end cover 11 is fixed to complete the installation and fixing of the entire oil guide ring 6.

[0058] In addition, in order to further enhance the stability and reliability of the connection assembly, it is possible to consider adding a locking device at the connection between the threaded connection and the oil guide ring 6. For example, a locking nut or a locking washer can be used to prevent the threaded connection from loosening due to vibration or thermal expansion during the operation of the motor. The use of the locking device not only improves the vibration resistance of the connection assembly, but also ensures stability and safety during long-term operation.

[0059] In practical applications, screw connectors and locking devices made of different materials can be selected according to different working environments and requirements. For example, for oil-cooled motors working in high-temperature environments, high-temperature resistant alloy materials can be selected to manufacture screw connectors and locking devices to ensure their mechanical properties and corrosion resistance at high temperatures. In highly corrosive environments, corrosion-resistant materials such as stainless steel or specially coated screw connectors can be selected to extend the service life of the entire connection assembly.

[0060] The position of the oil guide ring 6 installed in the shell 1 is also subject to certain restrictions. The oil guide ring 6 needs to spray cooling oil toward the spiral groove 7 with the help of the oil outlet hole 9. Therefore, the installation position of the oil guide ring 6 needs to ensure that the cooling oil sprayed from the oil outlet hole 9 can enter the spiral groove 7. Therefore, it is necessary to use other parts to limit the installation position of the oil guide ring 6. Specifically, in an embodiment of the present invention, the connecting assembly also includes a positioning member, which is arranged between the end cover 11 and the oil guide ring 6 to limit the installation position of the positioning member. Its main function is to limit and ensure the accuracy of the installation position of the positioning member. Through the positioning member, we can ensure that there is a proper alignment relationship between the oil outlet hole 9 of the oil guide ring 6 and the spiral groove 7, so that the cooling oil can be effectively sprayed into the spiral groove 7 to achieve the expected cooling effect.

[0061] The design of the locating piece takes into account many factors, including size, shape and material. In terms of size, the locating piece must be large enough to provide stable support, but not too large to affect the flow of cooling oil. In terms of shape, a design that can closely match the end cover 11 and the oil guide ring 6 is usually adopted, such as a stepped or concave-convex structure, to ensure that the locating piece will not shift during installation. In terms of material selection, the locating piece needs to have good mechanical strength and oil resistance to withstand wear and oil erosion during long-term operation.

[0062] During the actual installation process, the positioning piece is first placed between the end cover 11 and the oil guide ring 6, and then fixed in an appropriate position by means of threads or other mechanical fixing methods. In this way, the alignment relationship between the oil outlet hole 9 of the oil guide ring 6 and the spiral groove 7 is established, thereby ensuring the correct spraying path of the cooling oil. In addition, in order to further improve the accuracy and reliability of the installation, the installation position of the positioning piece can be designed with a special guide structure, such as a guide groove or a guide hole, to ensure that the positioning piece can be automatically aligned during installation and reduce human operation errors.

[0063] When installing, the oil guide ring 6 is firstly installed in a certain position by means of a positioning piece, and then fixed to the end cover 11 by means of a screw connection, and then is sleeved on the drive shaft 2, and one end of the drive shaft 2 is rotatably connected to the end cover 11, and then the end cover 11 is fixed, and the oil pump 31 and the condenser 32 are started at the same time as the motor is started, the oil pump 31 transports the cooling oil to the filter device 33 to filter out impurities, and then transports it to the condenser 32 to adjust the temperature, and then transports it to the oil storage cavity 8 of the oil guide ring 6 through the condenser 32, and finally sprays it into the spiral groove 7 through the oil outlet hole 9, and the cooling oil in the spiral groove 7 is transported to the hollow cavity of the rotor shaft 41 under the action of pump suction, so as to cool the inside of the rotor body 4, and the cooling oil part entering the hollow cavity of the rotor shaft 41 will be transported to the two ends of the rotor body 4 through the oil throwing hole 5 for cooling, thereby cooling the entire rotor during the operation of the motor to ensure that the working temperature of the rotor magnet will not cause demagnetization.

[0064] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An oil-cooled motor structure, characterized in that: include: case; A drive shaft, rotatably mounted on the housing; The rotor body has a hollow rotor shaft, the rotor shaft is drivingly connected to the drive shaft and sleeved on the drive shaft; an oil guide ring, sleeved on the drive shaft, the oil guide ring being located at one end of the rotor shaft, the oil guide ring being provided with an oil storage cavity, and the oil guide ring being provided with an oil outlet hole communicating with the oil storage cavity on a side of the oil guide ring facing the drive shaft, so as to transport cooling oil between the drive shaft and the rotor shaft; and A conveying structure is installed on the housing, and the conveying structure is used to convey cooling oil toward the oil storage cavity.

2. The oil-cooled motor structure according to claim 1, characterized in that: A spiral groove is provided on the outer peripheral side of the drive shaft, and the spiral groove is extended in an axial spiral manner along the drive shaft. One end of the spiral groove is arranged between the rotor shaft and the drive shaft, and the other end of the spiral groove is arranged corresponding to the oil outlet hole to receive the cooling oil delivered by the oil outlet hole.

3. The oil-cooled motor structure according to claim 2, characterized in that: Two connecting holes for the driving shaft to pass through are formed at both ends of the rotor shaft, and the spiral groove is located in one of the connecting holes.

4. The oil-cooled motor structure according to claim 1, characterized in that: The inner cavity wall of the rotor shaft is provided with a plurality of oil-slinging holes extending to the end of the rotor body for conveying cooling oil toward the end of the rotor body.

5. The oil-cooled motor structure according to claim 1, characterized in that: The conveying structure comprises: an oil pump, mounted on the housing, for extracting cooling oil; A condenser is communicated with the oil pump and the oil guide ring to transport cooling oil into the oil storage cavity.

6. The oil-cooled motor structure according to claim 5, characterized in that: The conveying structure further includes a filtering device, and the filtering device is communicated with the oil pump and the condenser respectively.

7. The oil-cooled motor structure according to claim 6, characterized in that: The filtering device comprises a filter element, and the filter element is detachably arranged on the housing.

8. The oil-cooled motor structure according to claim 1, characterized in that: The housing comprises an end cover, which is rotatably mounted on one end of the drive shaft close to the oil guide ring. A connecting assembly is arranged on the end cover, and the connecting assembly is used to fix the end cover and the oil guide ring.

9. The oil-cooled motor structure according to claim 8, characterized in that: The connecting assembly comprises a threaded connection member, which passes through the end cover and is threadedly connected to the oil guide ring.

10. The oil-cooled motor structure according to claim 8, characterized in that: The connecting assembly further comprises a positioning member, wherein the positioning member is arranged between the end cover and the oil guide ring and is used to limit the installation position of the positioning member.

Images