Motor cooling casing structure and motor

By adopting coaxially arranged inner, middle and outer cylinder structures in the motor cooling casing, combined with the design of grooves and through holes, lightweight and efficient cooling is achieved, solving the problems of complex processing, high cost and heavy weight in the prior art, and improving production efficiency and cooling effect.

CN222721239UActive Publication Date: 2025-04-04SICHUAN SONGZHENG AVIATION POWER TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421222930.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-31
Publication Date
2025-04-04
Estimated Expiration
2034-05-31

AI Technical Summary

Technical Problem

The existing motor case is complex, costly, and has a large weight, which is difficult to meet the needs of lightweight, and the sealing and welding processes are cumbersome, which affects production efficiency.

Method used

The inner cylinder, middle cylinder and outer cylinder structure are adopted coaxially arranged, and the middle cylinder is equipped with a groove structure and flow holes to realize the flow and heat exchange of cooling medium. The inner cylinder, middle cylinder and outer cylinder are quickly installed through the limit structure and are connected through integral welding to reduce production costs.

Benefits of technology

The motor cooling case is lighter, and the overall mass is more than 50% lighter than the traditional stretched case, which simplifies the installation process and sealing process, reduces production costs, and improves the cooling effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a motor cooling casing structure and a motor, the motor cooling casing structure comprises an inner cylinder, a middle cylinder and an outer cylinder which are coaxially arranged, and the inner cylinder and the outer cylinder are arranged at two sides of the middle cylinder; wherein the middle barrel comprises a middle barrel main body, the middle barrel main body comprises a plurality of groove structures which are sequentially connected in the axial direction of the middle barrel, and a groove is formed between every two adjacent groove structures, so that a plurality of flow channels are formed between the middle barrel and the inner barrel and between the middle barrel and the outer barrel; a circulation hole is formed in the groove structure, so that every two adjacent flow channels communicate with each other, and flowing of the cooling medium is achieved. The utility model has the beneficial effects that the cooling flow channel is convenient to process and free in design, the cooling contact area is larger, and the cooling effect is better; the motor cooling casing is a sheet metal forming casing, and the inner cylinder, the middle cylinder and the outer cylinder are all formed by sheet metal stamping and are connected through integral welding, so that the manufacturing cost is low; after the machine shell is machined, finish machining of the matching face is not needed, and machining procedures are reduced.
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Description

Technical Field

[0001] The utility model belongs to the technical field of motor production, and in particular relates to a motor cooling casing structure and a motor. Background Art

[0002] The motor housing is generally made using mechanical processing technology. The water channel is processed on the outer surface of the housing, and a circle of sealing sleeve is made on the outer ring to be assembled on the outer surface of the water channel. Some seals and water nozzles are added or welded at the corresponding positions. The overall processing is complicated and the cost is high.

[0003] Due to the pure machining process, large processing volume and high cost, for batch products, it is generally chosen to develop casting molds. Non-important surfaces only need rough machining, and important surfaces need fine machining, but an outer cylindrical sealing shell or welding shell is also required.

[0004] With the demand for cost, a batch of one-piece stretch-formed housings have appeared on the market. The water channel is stretched and formed in one piece with the housing. This kind of stretch profile generally uses 6063-T5 aluminum alloy, which has low strength and can only meet general needs. The two ends are sealed or welded, and holes are opened on the outer circle of the housing, and then the water nozzles are welded. After the overall welding, fine processing is carried out to further reduce the cost.

[0005] The above types have the following common disadvantages: First, the overall weight is too heavy, which cannot meet the needs of some fields such as vehicles or aircraft that have high requirements for lightweight. Second, after processing, the water channel needs to be sealed or welded, and the external water nozzle part also needs to be reprocessed. Third, the shell needs to be assembled with the stator, and the matching dimensions of the shell, stator and two end covers cannot usually be designed to be the same size, that is, it is not convenient to process the whole in one clamping to ensure the overall coaxiality. Summary of the invention

[0006] In view of the above problems, the utility model provides a motor cooling casing structure and a motor to solve the above or other problems existing in the prior art.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is: a motor cooling casing structure, comprising an inner cylinder, a middle cylinder and an outer cylinder arranged coaxially, wherein the inner cylinder and the outer cylinder are arranged on both sides of the middle cylinder; wherein,

[0008] The middle cylinder includes a middle cylinder body, which includes a plurality of groove structures sequentially connected along the axial direction of the middle cylinder, and a groove is configured between two adjacent groove structures, so that a plurality of flow channels are configured between the middle cylinder and the inner cylinder and between the middle cylinder and the outer cylinder;

[0009] The groove structure is provided with flow holes so that two adjacent flow channels are connected to realize the flow of cooling medium.

[0010] Furthermore, the groove structure includes a first inclined portion, a transition portion and a second inclined portion connected to each other, the first inclined portion and the second inclined portion are arranged at two ends of the transition portion, and the first inclined portion and the second inclined portion are both arranged on the same side of the transition portion.

[0011] Further, the transition portion contacts the inner tube or the outer tube, and the connection between the adjacent first inclined portion and the second inclined portion contacts the outer tube or the inner tube.

[0012] Furthermore, a transition portion of the groove structure provided at both ends of the middle tube body is provided with a receiving groove, and a sealing member is provided in the receiving groove.

[0013] Furthermore, the first inclined portion and the second inclined portion are both provided with a plurality of flow holes, and the plurality of flow holes are sequentially arranged along the circumferential direction of the first inclined portion or the second inclined portion.

[0014] Furthermore, both ends of the middle cylinder body are provided with middle cylinder limiting structures for axially limiting the inner cylinder and the outer cylinder respectively. The middle cylinder limiting structure is coaxially arranged with the middle cylinder body, and the outer diameter of the middle cylinder limiting structure is adapted to the maximum outer diameter of the middle cylinder body.

[0015] Furthermore, a plurality of connecting members are provided on the middle cylinder limiting structure, and the plurality of connecting members are arranged in sequence along the circumferential direction of the middle cylinder limiting structure.

[0016] Furthermore, the outer cylinder includes an outer cylinder body and an outer cylinder limiting structure arranged at either end of the outer cylinder body. The outer cylinder limiting structure is coaxially arranged with the outer cylinder body, and the outer diameter size of the outer cylinder limiting structure is adapted to the diameter of the outer cylinder body. A water inlet connecting hole and a water outlet connecting hole are provided on the outer cylinder body. The water inlet connecting hole is used for connecting to the water inlet, and the water outlet connecting hole is used for connecting to the water outlet.

[0017] Furthermore, the inner cylinder comprises an inner cylinder body and an inner cylinder limiting structure arranged at either end of the inner cylinder, the inner cylinder limiting structure is coaxially arranged with the inner cylinder body, and the inner diameter of the inner cylinder limiting structure is adapted to the diameter of the inner cylinder body.

[0018] Further, the outer tube limiting structure is provided with a first positioning structure, the inner tube limiting structure is provided with a second positioning structure, and the middle tube limiting structure is provided with a third positioning structure. The first positioning structure is plugged into and matched with the third positioning structure on the middle tube limiting structure at one end of the middle tube main body, and positioning is performed during the installation of the outer tube and the middle tube. The second positioning structure is plugged into and matched with the third positioning structure on the middle tube limiting structure at the other end of the middle tube main body, and positioning is performed during the installation of the inner tube and the middle tube.

[0019] Furthermore, a limiting member is provided on one side of the inner cylinder facing the stator to perform axial positioning on the stator when the stator is installed.

[0020] Furthermore, the inner cylinder, the middle cylinder and the outer cylinder are prepared by stamping and winding a steel plate or an aluminum plate, or the inner cylinder, the middle cylinder and the outer cylinder are prepared by spinning a barrel material.

[0021] A motor comprises the motor cooling casing structure as described above, a front cover and a rear cover arranged at both ends of the motor cooling casing structure, and a stator. The stator is arranged in an inner tube, and the front cover and the rear cover are connected to the motor cooling casing structure through fixing parts.

[0022] Due to the adoption of the above technical solution, the motor cooling casing structure comprises a coaxially arranged inner cylinder, a middle cylinder and an outer cylinder, the inner cylinder and the outer cylinder are located on the inner and outer sides of the middle cylinder, and the materials of the inner cylinder, the middle cylinder and the outer cylinder are a shell structure formed by sheet metal, so that the motor cooling casing is lightweight, and the overall mass is more than 50% lighter than the weight of a traditional stretched casing; the middle cylinder is provided with a middle cylinder limiting structure, the inner cylinder is provided with an inner cylinder limiting structure, and the outer cylinder is provided with an outer cylinder limiting structure, and the middle cylinder limiting structure cooperates with the inner cylinder limiting structure to perform axial positioning when the inner cylinder is installed, and the middle cylinder The limiting structure cooperates with the outer cylinder limiting structure to perform axial positioning when the outer cylinder is installed, so as to realize the rapid installation of the inner cylinder, the middle cylinder and the outer cylinder; the middle cylinder limiting structure is provided with a third positioning structure, the inner cylinder limiting structure is provided with a second positioning structure, the third positioning structure is plugged with the second positioning structure, so as to realize the rapid positioning of the inner cylinder and the outer cylinder during installation; the outer cylinder limiting structure is provided with a first positioning structure, the first positioning structure is plugged with the third positioning structure, so as to realize the rapid positioning of the inner cylinder and the outer cylinder during installation; the outer cylinder is provided with a water inlet connection The inner and outer cylinders are designed according to the size of the front and rear covers of the motor and the size of the stator during winding, so that the matching surfaces of the housing, the stator and the two end covers are of the same size, ensuring the overall coaxiality of the housing, the stator, and the bearing seat holes of the two end covers; the main body of the middle cylinder is composed of a plurality of groove structures connected in sequence along the axial direction, so that the middle cylinder can be easily welded to the outer cylinder. A plurality of flow channels are arranged on the cylinder body, and a flow hole is arranged on the groove structure, so that two adjacent flow channels are connected, so that the cooling medium flows in the flow channel formed by the middle cylinder and the inner cylinder and the flow channel formed by the middle cylinder and the outer cylinder. The cooling flow channel is easy to process and free to design, the cooling contact area is larger, and the cooling effect is better. The motor cooling casing is a sheet metal forming casing, and the inner cylinder, the middle cylinder and the outer cylinder are all formed by sheet metal stamping and connected by integral welding, so the production cost is low. After the casing is processed, there is no need to fine-process the mating surface, which reduces the processing steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of a motor in one embodiment of the utility model;

[0024] Figure 2It is a side view structural schematic diagram of a motor cooling casing of an embodiment of the utility model;

[0025] Figure 3 yes Figure 2 AA cross-sectional structural diagram;

[0026] Figure 4 yes Figure 3 A magnified view of part B;

[0027] Figure 5 This is a schematic structural diagram of an inner cylinder of an embodiment of the utility model;

[0028] Figure 6 It is a side view structural schematic diagram of an inner cylinder of an embodiment of the utility model;

[0029] Figure 7 yes Figure 6 Schematic diagram of CC cross-sectional structure;

[0030] Figure 8 This is a schematic structural diagram of a middle tube in one embodiment of the utility model;

[0031] Fig. 9 It is a side view structural schematic diagram of a middle tube in one embodiment of the utility model;

[0032] Fig.10 yes Fig. 9 DD cross-sectional structure diagram;

[0033] Fig.11 This is a schematic structural diagram of an outer cylinder of an embodiment of the utility model;

[0034] Fig.12 It is a side view structural schematic diagram of an outer cylinder of an embodiment of the utility model;

[0035] Fig.13 yes Fig.12 Schematic diagram of EE cross-sectional structure.

[0036] In the figure:

[0037] 1. Housing 2. Front cover 3. Rear cover

[0038] 4. Stator 5. Fixing parts 6. Water inlet nozzle

[0039] 7. Spout 10, outer cylinder 11, middle cylinder

[0040] 12. Inner tube 13. Limiting piece 14. Sealing piece

[0041] 15, connecting piece 16, mounting hole 100, outer tube body

[0042] 101, water outlet connection hole 102, water inlet connection hole 103, outer tube limit structure

[0043] 104, first positioning structure 110, middle tube body 111, middle tube limiting structure

[0044] 112, circulation hole 113, third positioning structure 120, inner tube body

[0045] 121. Inner cylinder limiting structure 122. Second positioning structure DETAILED DESCRIPTION

[0046] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0047] Figure 1 A structural schematic diagram of an embodiment of the utility model is shown. This embodiment relates to a motor cooling casing structure and a motor. The motor cooling casing is made of lightweight sheet metal material. Through the cooperation of the middle cylinder, the inner cylinder and the outer cylinder, the cooling channel can be freely designed and processed conveniently. The assembly coaxiality accuracy of the casing, the stator and the end cover is higher, thereby reducing the overall cost of the motor.

[0048] A motor cooling housing 1 structure, such as Figure 1-4 As shown, the motor cooling housing 1 comprises an inner cylinder 12, a middle cylinder 11 and an outer cylinder 10 which are coaxially arranged. The inner cylinder 12 and the outer cylinder 10 are arranged on both sides of the middle cylinder 11. That is, the motor cooling housing 1 has a three-layer structure. The inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are sheathed together. The inner cylinder 12 is located at the innermost part, the outer cylinder 10 is located at the outermost part, and the middle cylinder 11 is located between the inner cylinder 12 and the outer cylinder 10. After the inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are sheathed, the inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are coaxially arranged. The motor cooling casing 1 is arranged to form an overall structure, and the motor cooling casing 1 has a simple structure and is easy to install; wherein the inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are all shell structures, and the inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are prepared by stamping and welding of steel plates or aluminum plates, or the inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are prepared by spinning of barrel materials, so that the weight of the motor casing 1 is reduced, and the weight of the motor casing 1 is reduced, and the overall weight is reduced by more than 50% compared with the weight of the transmission casing 1.

[0049] In some feasible embodiments, the inner cylinder 12 is a tubular structure with a certain length, and its shape can be cylindrical. The inner cylinder 12 is hollow inside and has a cavity, and both ends are open so that the stator 4 can be installed in the internal space of the inner cylinder 12.

[0050] In some feasible embodiments, the middle cylinder 11 is a tubular structure with a certain length, and its shape can be cylindrical. The middle cylinder 11 is hollow inside, has a cavity, and is open at both ends so that the inner cylinder 12 can be installed in the internal space of the middle cylinder 11.

[0051] In some feasible embodiments, the outer cylinder 10 is a tubular structure with a certain length, and its shape can be cylindrical. The outer cylinder 10 is hollow inside, has a cavity, and is open at both ends so that the component structure composed of the inner cylinder 12 and the middle cylinder 11 can be installed in the internal space of the outer cylinder 10.

[0052] Specifically, Figure 8-10 As shown, the middle cylinder 11 includes a middle cylinder body 110, and the middle cylinder body 110 includes a plurality of groove structures connected in sequence along the axial direction of the middle cylinder 11, and a groove is configured between two adjacent groove structures, so that a plurality of flow channels are configured between the middle cylinder 11 and the inner cylinder 12, and a plurality of flow channels are configured between the middle cylinder 11 and the outer cylinder 10 to realize the flow of the cooling medium, that is, the peripheral side surface of the middle cylinder body 110 is not a smooth curved surface structure, but a plurality of protrusions are sequentially arranged along the axial direction of the middle cylinder body 110, and there are grooves between adjacent protrusions, and the inner surface and the outer surface of the peripheral side surface of the middle cylinder body 110 have similar structures The outer surface of the peripheral side surface of the middle cylinder body 110 is a convexity, and correspondingly, the inner surface of the peripheral side surface of the middle cylinder body 110 is a groove, so that the cross-sectional shape of the middle cylinder body 110 along the axial direction is a curved structure, preferably similar to a sine curve shape, any groove on the outer surface of the peripheral side surface of the middle cylinder body 110 and the outer cylinder 10 form a flow channel, so that the cooling medium flows between the middle cylinder 11 and the outer cylinder 10 for heat exchange, and any groove on the inner surface of the peripheral side surface of the middle cylinder body 110 and the inner cylinder 12 form a flow channel, so that the cooling medium flows between the middle cylinder 11 and the inner cylinder 12 for heat exchange.

[0053] In some feasible embodiments, the maximum outer diameters of the groove structures of the middle cylinder body 110 are the same, that is, the protrusions of the groove structures of the middle cylinder body 110 are located on the same circumferential plane, so that the structure of the middle cylinder 11 is symmetrical, which facilitates the installation and cooperation of the middle cylinder 11 with the inner cylinder 12 and the outer cylinder 10.

[0054] The groove structure is provided with a flow hole 112, so that two adjacent flow channels are connected to realize the flow of cooling medium. The setting of the flow hole 112 connects the two adjacent flow channels located on the inner and outer sides of the middle tube 11, so that the cooling medium between the middle tube 11 and the outer tube 10 can flow and exchange with the cooling medium between the middle tube 11 and the inner tube 12 to perform heat exchange.

[0055] The above-mentioned groove structure includes a first inclined portion, a transition portion and a second inclined portion that are connected to each other. The first inclined portion and the second inclined portion are arranged at both ends of the transition portion, and the first inclined portion and the second inclined portion are both arranged on the same side of the transition portion. The transition portion is an annular structure, and its cross-sectional shape can be a straight line structure or a curved structure, such as an arc, which is selected according to actual needs. The first inclined portion and the second inclined portion are both annular structures, and the cross-sectional shape of the first inclined portion and the cross-sectional shape of the second inclined portion can be a straight line structure or a curved structure, which is selected according to actual needs; one end of the first inclined portion is connected to one end of the transition portion, and the other end of the transition portion is connected to one end of the second inclined portion, and the other end of the first inclined portion and the other end of the second inclined portion are both located on the same side of the transition portion, and the distance between the other end of the first inclined portion and the other end of the second inclined portion is greater than the length of the transition portion, thereby constructing a groove structure with a certain depth, and the cooling medium can flow along the groove structure.

[0056] The other end of the first inclined portion of a groove structure is connected to the other end of the second inclined portion of an adjacent groove structure, and the other end of the second inclined portion is connected to the other end of the first inclined portion of an adjacent groove structure. Multiple groove structures are connected in sequence along the axial direction of the middle tube body 110 to form the overall structure of the middle tube body 110.

[0057] The first inclined portion is fixedly connected to the transition portion, and the fixed connection is preferably integrally formed. The second inclined portion is fixedly connected to the transition portion, and the fixed connection is preferably integrally formed, so that the middle cylinder body 110 has a stable structure and a long service life.

[0058] In order to make the overall structure of the motor cooling casing 1 compact, and the middle cylinder 11 can support the outer cylinder 10 and the inner cylinder 12, reduce the deformation of the inner cylinder 12 and the outer cylinder 10, the transition part contacts the inner cylinder 12 or the outer cylinder 10, and the connection between the adjacent first inclined part and the second inclined part contacts the outer cylinder 10 or the inner cylinder 12, that is, the transition part of the groove structure on the outer surface of the peripheral side surface of the middle cylinder main body 110 contacts the outer cylinder 10, supports the outer cylinder 10, and the groove between the outer cylinder 10 and the two adjacent transition parts constitute a flow channel, the transition part of the groove structure on the inner surface of the peripheral side surface of the middle cylinder main body 110 contacts the inner cylinder 12, supports the inner cylinder 12, and the groove between the inner cylinder 12 and the two adjacent transition parts constitute a flow channel, and the middle cylinder main body 110 forms a flow channel while supporting the inner cylinder 12 and the outer cylinder 10 to realize the circulation of the cooling medium.

[0059] In order to prevent the cooling medium from leaking out of the two ends of the motor cooling housing, the transition parts of the groove structures at the two ends of the middle cylinder 11 are provided with receiving grooves, and the sealing members 14 are provided in the receiving grooves to seal the cooling medium in the flow channels between the groove structures at the two ends, and the cooling medium flows in the multiple flow channels between the groove structures at the two ends. The receiving groove is a groove structure with a certain depth, which is formed by the transition part being recessed inwardly, and the sealing member 14 is installed in the receiving groove, and the sealing member 14 is preferably a sealing ring, which can be an O-type sealing ring, to seal the contact between the middle cylinder 11 and the outer cylinder 10.

[0060] Both the first inclined portion and the second inclined portion are provided with a plurality of flow holes 112, and the plurality of flow holes 112 are arranged in sequence along the circumferential direction of the first inclined portion or the second inclined portion. The flow holes 112 are through holes, so that the two side surfaces of the first inclined portion or the second inclined portion are connected, and the number of the flow holes 112 is selected according to actual needs.

[0061] Both ends of the middle cylinder body 110 are provided with a middle cylinder limiting structure 111 for connecting with the inner cylinder 12 and the outer cylinder 10 respectively. The middle cylinder limiting structure 111 is coaxially arranged with the middle cylinder body 110. The middle cylinder limiting structure 111 is an annular plate structure. The outer diameter of the middle cylinder limiting structure 111 is adapted to the maximum outer diameter of the middle cylinder body 110. The inner diameter end of the middle cylinder limiting structure 111 is connected to the end of the middle cylinder body 110. The outer diameter end of the middle cylinder limiting structure 111 and the transition part of the groove structure of the middle cylinder body 110 are located in the same circumferential surface. The setting of the middle cylinder limiting structure 111 performs axial positioning when the middle cylinder 11 is installed with the inner cylinder 12 and the outer cylinder 10, so that the inner cylinder 12 and the outer cylinder 10 can be quickly installed on the middle cylinder 11. At the same time, the setting of the middle cylinder limiting structure 111 facilitates the connection of the motor cooling housing 1 with the front cover 2 and the rear cover 3.

[0062] The middle cylinder limiting structure 111 is provided with a plurality of mounting holes 16, and the plurality of mounting holes 16 are sequentially arranged along the circumferential direction of the middle cylinder limiting structure 111, and the mounting holes 16 are through holes, so that the middle cylinder 11, the outer cylinder 10 and the inner cylinder 12 are connected with the front end cover 2 and the rear end cover 3 through the fixing member 5, and the fixing member 5 can be a connecting member 15 such as a bolt.

[0063] like Figure 11-13As shown, the outer cylinder 10 comprises an outer cylinder body 100 and an outer cylinder limiting structure 103 provided at either end of the outer cylinder body 100. The outer cylinder limiting structure 103 is coaxially arranged with the outer cylinder body 100, and the outer diameter of the outer cylinder limiting structure 103 is adapted to the diameter of the outer cylinder body 100. The outer cylinder body 100 is a cylindrical structure with a certain length, and its peripheral side surface is a smooth curved surface. The outer cylinder limiting structure 103 is fixedly arranged at either end of the outer cylinder body 100, and the outer cylinder limiting structure 103 is fixedly connected to the outer cylinder body 100. The fixed connection mode is preferably integrally formed, so that the outer cylinder 10 has a long service life. The outer cylinder limiting structure 103 is an annular plate structure, the outer diameter end of the outer cylinder limiting structure 103 is connected to the end of the outer cylinder body 100, and the inner diameter end of the outer cylinder limiting structure 103 corresponds to the internal space of the outer cylinder body 100, that is, the outer cylinder limiting structure 103 does not protrude from the peripheral side of the outer cylinder body 100. The outer cylinder limiting structure 103 performs axial positioning on the outer cylinder 10 and the middle cylinder 11 when installing, so that the outer cylinder 10 and the middle cylinder 11 can be quickly installed.

[0064] The above-mentioned outer cylinder limiting structure 103 is provided with a plurality of mounting holes 16, and the plurality of mounting holes 16 are sequentially arranged along the circumferential direction of the outer cylinder limiting structure 103, and the number of the mounting holes 16 corresponds to the number of the mounting holes 16 on the middle cylinder limiting structure 111, and the arrangement of each mounting hole 16 corresponds to the arrangement of each mounting hole 16 on the middle cylinder limiting structure 111, so that the outer cylinder 10 and the middle cylinder 11 are connected and fixed to the front end cover 2 or the rear end cover 3 through the fixing member 5.

[0065] In order to facilitate the cooling medium to enter the flow channel between the outer cylinder 10 and the inner cylinder 12 and the flow channel between the inner cylinder 12 and the middle cylinder 11, the outer cylinder body 100 is provided with an inlet nozzle connecting hole 102 and a water outlet nozzle connecting hole 101. The inlet nozzle connecting hole 102 is used to connect with the water inlet nozzle 6, and the water outlet nozzle connecting hole 101 is used to connect with the water outlet nozzle 7. The inlet nozzle connecting hole 102 is a through hole, and the water inlet nozzle 6 is fixedly installed at the inlet nozzle connecting hole 102, and the water inlet nozzle 6 is connected with the interior of the outer cylinder 10. The water outlet nozzle connecting hole 101 is a through hole, and the water outlet nozzle 7 is fixedly installed at the water outlet nozzle connecting hole 101, and the water outlet nozzle 7 is connected with the interior of the outer cylinder 10, so as to realize the cooling medium flowing into the motor cooling casing 1 and flowing out of the motor cooling casing 1.

[0066] like Figure 5-7As shown, the inner cylinder 12 includes an inner cylinder body 120 and an inner cylinder limiting structure 121 provided at either end of the inner cylinder body 120. The inner cylinder limiting structure 121 is coaxially arranged with the inner cylinder body 120, and the inner diameter of the inner cylinder limiting structure 121 is adapted to the diameter of the inner cylinder body 120. The inner cylinder body 120 is a cylindrical structure with a certain length, and its circumferential side surface is a smooth curved surface. The inner cylinder limiting structure 121 is fixedly arranged at either end of the inner cylinder body 120. The fixed connection method is preferably integrally formed, so that the service life of the inner cylinder 12 is long. The inner cylinder limiting structure 121 is an annular plate structure, and the inner diameter end of the inner cylinder limiting structure 121 is fixedly connected to the end of the inner cylinder body 120, that is, the outer diameter end of the inner cylinder limiting structure 121 protrudes from the peripheral side surface of the inner cylinder body 120. The setting of the inner cylinder limiting structure 121 performs axial limiting during the installation process of the inner cylinder 12 and the middle cylinder 11, thereby realizing rapid installation of the inner cylinder 12 and the middle cylinder 11.

[0067] The above-mentioned inner cylinder limiting structure 121 is provided with a plurality of mounting holes 16, and the plurality of mounting holes 16 are sequentially arranged along the circumferential direction of the inner cylinder limiting structure 121, and the number of the mounting holes 16 corresponds to the number of the mounting holes 16 on the middle cylinder limiting structure 111, and the arrangement of each mounting hole 16 corresponds to the arrangement of each mounting hole 16 on the middle cylinder limiting structure 111, so that the inner cylinder 12 and the middle cylinder 11 are connected and fixed to the front end cover 2 or the rear end cover 3 through the fixing member 5.

[0068] In order to facilitate rapid positioning of the outer cylinder 10 and the middle cylinder 11 during installation, the outer cylinder limiting structure 103 is provided with a first positioning structure 104, and the middle cylinder limiting structure 111 at one end of the middle cylinder body 110 is provided with a third positioning structure 113. The first positioning structure 104 and the third positioning structure 113 are plugged and matched to achieve rapid positioning of the outer cylinder 10 and the middle cylinder 11. After the outer cylinder 10 and the middle cylinder 11 are assembled, the various mounting holes 16 on the outer cylinder limiting structure 103 correspond to the various mounting holes 16 on the middle cylinder limiting structure 111, so as to facilitate subsequent connection and fixation.

[0069] In order to facilitate rapid positioning of the inner cylinder 12 and the middle cylinder 11 during installation, the inner cylinder limiting structure 121 is provided with a second positioning structure 122, and the middle cylinder limiting structure 111 at the other end of the middle cylinder body 110 is provided with a third positioning structure 113. The second positioning structure 122 and the third positioning structure 113 are plugged and matched to achieve rapid positioning of the inner cylinder 12 and the middle cylinder 11. After the inner cylinder 12 and the middle cylinder 11 are assembled, the various mounting holes 16 on the inner cylinder limiting structure 121 correspond to the various mounting holes 16 on the middle cylinder limiting structure 111, so as to facilitate subsequent connection and fixation.

[0070] The first positioning structure 104 and the second positioning structure 122 are protruding structures, such as protruding blocks or column structures, and the third positioning structure 113 is a groove or through-hole structure, so as to achieve plug-in matching and rapid positioning.

[0071] A stopper 13 is provided on one side of the inner cylinder 12 facing the stator 4, and the stator 4 is axially positioned when the stator 4 is installed. The stopper 13 is a plate structure with a certain length, which is arranged along the axial direction of the inner cylinder 12, fixedly installed on the inner side surface of the inner cylinder 12, and protrudes from the inner side surface of the inner cylinder 12. When the stator 4 is installed, it contacts the end of the stator 4 to position the stator 4 in the axial direction.

[0072] The lengths of the inner cylinder body 120, the middle cylinder body 110 and the outer cylinder body 100 are adapted to each other. When the inner cylinder 12, the middle cylinder 11 and the outer cylinder 10 are installed, the inner cylinder limiting structure 121 contacts the middle cylinder limiting structure 111 at one end of the middle cylinder body 110 to be connected, and the outer cylinder limiting structure 103 contacts the middle 1 limiting structure 111 at the other end of the middle cylinder body 110 to be connected, thereby forming the overall structure of the motor cooling casing 1.

[0073] In order to facilitate the connection between the motor cooling housing and the front end cover 2 and the rear end cover 3 of the motor through the fixing member 5, a connecting member 15 is provided on the middle cylinder limiting structure 111. The number of the connecting members 15 corresponds to the number of the mounting holes 16 on the middle cylinder limiting structure 111. A connecting member 15 is fixedly installed at each mounting hole 16. Through the connecting member 15, the motor cooling housing 1 is respectively connected to the front end cover 2 and the rear end cover 3 through the fixing member 5. The connecting member 15 is located on a side surface of the middle cylinder limiting structure 111 facing the middle cylinder main body 110. The connecting members 15 on the two middle cylinder limiting structures 111 are arranged face to face, so that the connecting member 15 is located in the space formed by the middle cylinder 11 and the outer cylinder 10, and will not be exposed to the outside of the motor cooling housing, and will not interfere with the installation of the motor cooling housing 1 and the front end cover 2 and the rear end cover 3.

[0074] In some feasible embodiments, the connector 15 is preferably a nut, and the nut is preferably welded to the middle cylinder limiting structure 111. Of course, the connector 15 can also be a block structure protruding from the side of the middle cylinder limiting structure 111, and the block structure has a threaded through hole.

[0075] When the motor cooling casing 1 is assembled, the middle cylinder 11 is sleeved on the outside of the inner cylinder 12 along the axial direction of the inner cylinder 12, and the second positioning structure 122 on the inner cylinder 12 corresponds to the third positioning structure 113 on the middle cylinder limiting structure 111 at one end of the middle cylinder body 110. When the inner cylinder limiting structure 121 contacts the middle cylinder limiting structure 11, the second positioning structure 122 on the inner cylinder 12 is plugged and matched with the third positioning structure 113 on the middle cylinder limiting structure 111 at one end of the middle cylinder body 110 to perform rapid positioning and installation, and the contact between the middle cylinder 11 and the inner cylinder 12 is welded and fixed;

[0076] Along the axial direction of the inner cylinder 12, the outer cylinder 10 is sleeved on the outside of the middle cylinder 11, and the first positioning structure 104 on the outer cylinder 10 corresponds to the third positioning structure 113 on the middle cylinder limiting structure 111 at the other end of the middle cylinder body 110. When the outer cylinder limiting structure 103 contacts the middle cylinder limiting structure 11, the first positioning structure 104 on the outer cylinder 10 is plugged into and matched with the third positioning structure 113 on the middle cylinder limiting structure 111 at the other end of the middle cylinder body 110 to perform rapid positioning and installation. The contact between the middle cylinder 11 and the outer cylinder 10 is welded and fixed to complete the assembly of the motor cooling casing 1.

[0077] A motor, such as Figure 1 As shown, it includes the motor cooling casing structure as mentioned above, the front end cover 2 and the rear end cover 3 arranged at both ends of the motor cooling casing structure, and the stator 4, the stator 4 is arranged in the inner cylinder 12, the front end cover 2 and the rear end cover 3 are connected to the motor cooling casing structure through the fixing member 5, the fixing member 5 on the side of the front end cover 2 sequentially passes through the through hole on the front end cover 2 and the corresponding mounting holes 16 on the outer cylinder 10 and the middle cylinder 11, and is connected to the connecting member on the inner cylinder 11, the fixing member 5 on the side of the rear end cover 3 sequentially passes through the through hole on the rear end cover 3 and the corresponding mounting holes 16 on the inner cylinder 12 and the middle cylinder 11, and is connected to the connecting member on the inner cylinder 11, so that the casing 1 is installed together with the front end cover 2 and the rear end cover 3.

[0078] A method for manufacturing a motor cooling casing structure, such as Figure 1-13 As shown, the following steps are included:

[0079] Preparation of the inner cylinder 12: the inner cylinder body 120 is prepared by winding, and any end of the inner cylinder body 120 is spun to prepare the inner cylinder limiting structure 121; the material of the inner cylinder 12 is a steel plate or an aluminum plate, or the material of the inner cylinder 12 is a barrel material, which is selected according to actual needs; the cylindrical inner cylinder body 120 is prepared by winding and forming, and then one end of the inner cylinder body 120 is spun to form the inner cylinder limiting structure 121, and the inner cylinder limiting structure 121 is coaxially arranged with the inner cylinder body 120, and the excess material is cut off to complete the preparation of the inner cylinder 12;

[0080] Welding the stopper 13, according to the actual size of the stator 4 and design requirements, weld the stopper 13 to the corresponding position on the inner side of the inner cylinder body 120 to perform axial positioning when installing the stator 4;

[0081] Preparation of the middle cylinder 11: preparing the flow hole 112 and the receiving groove by stamping, and preparing the middle cylinder body 110 by winding and then spinning. The material of the middle cylinder 11 can be a steel plate or an aluminum plate. According to the design size of the middle cylinder body 110, the flow hole 112 and the receiving groove are prepared by stamping, and then the middle cylinder body 110 is prepared by winding; or, the material of the inner cylinder 12 is a barrel material, and the flow hole 112 and the receiving groove are first prepared by stamping, and then the middle cylinder body 110 is prepared by spinning; after the middle cylinder 11 is prepared, the two ends of the middle cylinder body 110 are spun to prepare the middle cylinder limit structure 111, and the excess material is cut off to complete the preparation of the middle cylinder 11;

[0082] The inner cylinder 12 and the middle cylinder 11 are installed and fixed. Along the axial direction of the inner cylinder 12, the second positioning structure 122 on the inner cylinder limiting structure 121 corresponds to the third positioning structure 113 on the middle cylinder limiting structure 111. The middle cylinder 11 is sleeved on the outside of the inner cylinder 12. When the inner cylinder limiting structure 121 of the inner cylinder 12 contacts the middle cylinder limiting structure 111 at one end of the middle cylinder body 110, the second positioning structure 122 and the third positioning structure 113 are plugged and matched to position the middle cylinder 11 and the inner cylinder 12 in the axial direction, so that each mounting hole 16 on the middle cylinder limiting structure 111 corresponds to each mounting hole 16 on the inner cylinder limiting structure 121. Then, the contact position of the middle cylinder 11 and the inner cylinder 12 is rolled welded to be fixedly connected.

[0083] Then, the connectors 15 are welded at the mounting holes 16 on the middle cylinder limiting structures 111 at both ends of the middle cylinder body 110. The connectors 15 are coaxially arranged with the corresponding mounting holes 16. After the welding of the connectors 15 is completed, the assembly consisting of the middle cylinder 11 and the inner cylinder 12 is cleaned and surface treated according to actual needs, including galvanizing, chrome plating, anti-rust oil coating, etc.;

[0084] Prepare the outer cylinder 10: prepare the water inlet connection hole 102 and the water outlet connection hole 101 by stamping, and prepare the outer cylinder body 100 by winding. The material of the outer cylinder 10 may be a plate material, first prepare the water inlet connection hole 102, the water outlet connection hole 101 and a plurality of mounting holes 16 by stamping, and then prepare the outer cylinder body 100 by winding; or, the material of the outer cylinder 10 may be a barrel material, partially stamp the barrel material by stamping, prepare the water inlet connection hole 102, the water outlet connection hole 101 and a plurality of mounting holes 16, and then prepare the outer cylinder body 100 by spinning;

[0085] Spinning is performed on either end of the outer cylinder body 100 to prepare an outer cylinder limiting structure 103, and a plurality of mounting holes 16 are located at the outer cylinder limiting structure 103; the water inlet nozzle 6 and the water outlet nozzle 7 are fixedly installed, and the water inlet nozzle 6 is fixed at the water inlet nozzle connecting hole 102 and the water outlet nozzle 7 is fixed at the water outlet nozzle connecting hole 101 by welding, and the preparation of the outer cylinder 10 is completed;

[0086] The outer cylinder 10 is cleaned as a whole, and surface treated according to actual needs, including galvanizing, chrome plating, anti-rust oil coating, etc.;

[0087] Install the sealing member 14, the sealing member 14 is arranged in the receiving groove;

[0088] The outer cylinder 10 is heated, and the heated outer cylinder 10 is installed on the assembly of the inner cylinder 12 and the middle cylinder 11. Along the axial direction of the inner cylinder 12, the first positioning structure 104 on the outer cylinder limiting structure 103 corresponds to the third positioning structure 113 on the middle cylinder limiting structure 111 at the other end of the middle cylinder body 110, and the outer cylinder 10 is sleeved on the outside of the middle cylinder 11. The first positioning structure 104 and the third positioning structure 113 are plugged and matched, and the axial positioning is performed when the outer cylinder 10 is installed;

[0089] The contact boundary between the outer tube 10 and the middle tube 11 is welded all around to increase the strength.

[0090] In the above steps, when the outer cylinder 10 is heated, the heating temperature is 80-120° C., and the heating temperature is selected according to actual needs.

[0091] Due to the adoption of the above technical solution, the motor cooling casing structure comprises a coaxially arranged inner cylinder, a middle cylinder and an outer cylinder, the inner cylinder and the outer cylinder are located on the inner and outer sides of the middle cylinder, and the materials of the inner cylinder, the middle cylinder and the outer cylinder are a shell structure formed by sheet metal, so that the motor cooling casing is lightweight, and the overall mass is more than 50% lighter than the weight of a traditional stretched casing; the middle cylinder is provided with a middle cylinder limiting structure, the inner cylinder is provided with an inner cylinder limiting structure, and the outer cylinder is provided with an outer cylinder limiting structure, and the middle cylinder limiting structure cooperates with the inner cylinder limiting structure to perform axial positioning when the inner cylinder is installed, and the middle cylinder The limiting structure cooperates with the outer cylinder limiting structure to perform axial positioning when the outer cylinder is installed, so as to realize the rapid installation of the inner cylinder, the middle cylinder and the outer cylinder; the middle cylinder limiting structure is provided with a third positioning structure, the inner cylinder limiting structure is provided with a second positioning structure, the third positioning structure is plugged with the second positioning structure, so as to realize the rapid positioning of the inner cylinder and the outer cylinder during installation; the outer cylinder limiting structure is provided with a first positioning structure, the first positioning structure is plugged with the third positioning structure, so as to realize the rapid positioning of the inner cylinder and the outer cylinder during installation; the outer cylinder is provided with a water inlet connection The inner and outer cylinders are designed according to the size of the front and rear covers of the motor and the size of the stator during winding, so that the matching surfaces of the housing, the stator and the two end covers are of the same size, ensuring the overall coaxiality of the housing, the stator, and the bearing seat holes of the two end covers; the main body of the middle cylinder is composed of a plurality of groove structures connected in sequence along the axial direction, so that the middle cylinder can be easily welded to the outer cylinder. A plurality of flow channels are arranged on the cylinder body, and a flow hole is arranged on the groove structure, so that two adjacent flow channels are connected, so that the cooling medium flows in the flow channel formed by the middle cylinder and the inner cylinder and the flow channel formed by the middle cylinder and the outer cylinder. The cooling flow channel is easy to process and free to design, the cooling contact area is larger, and the cooling effect is better. The motor cooling casing is a sheet metal forming casing, and the inner cylinder, the middle cylinder and the outer cylinder are all formed by sheet metal stamping and connected by integral welding, so the production cost is low. After the casing is processed, there is no need to fine-process the mating surface, which reduces the processing steps.

[0092] The above is a detailed description of the embodiments of the utility model, but the contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A motor cooling casing structure, characterized in that: It comprises an inner cylinder, a middle cylinder and an outer cylinder which are arranged coaxially, wherein the inner cylinder and the outer cylinder are arranged on both sides of the middle cylinder; wherein, The middle cylinder comprises a middle cylinder body, and the middle cylinder body comprises a plurality of groove structures sequentially connected along the axial direction of the middle cylinder, and a groove is configured between two adjacent groove structures, so that a plurality of flow channels are configured between the middle cylinder and the inner cylinder and between the middle cylinder and the outer cylinder; The groove structure is provided with flow holes so that two adjacent flow channels are connected to achieve the flow of cooling medium.

2. The motor cooling housing structure according to claim 1, characterized in that: The groove structure comprises a first inclined portion, a transition portion and a second inclined portion connected to each other, wherein the first inclined portion and the second inclined portion are arranged at two ends of the transition portion, and the first inclined portion and the second inclined portion are arranged on the same side of the transition portion; the transition portion contacts the inner cylinder or the outer cylinder, and the connection between the adjacent first inclined portion and the second inclined portion contacts the outer cylinder or the inner cylinder; The transition part of the groove structure arranged at both ends of the middle tube body is provided with a receiving groove, and a sealing member is arranged in the receiving groove.

3. The motor cooling housing structure according to claim 2, characterized in that: The first inclined portion and the second inclined portion are both provided with a plurality of the flow holes, and the plurality of the flow holes are sequentially arranged along the circumferential direction of the first inclined portion or the second inclined portion.

4. The motor cooling housing structure according to any one of claims 1 to 3, characterized in that: Both ends of the middle cylinder body are provided with middle cylinder limiting structures for axially limiting the inner cylinder and the outer cylinder respectively. The middle cylinder limiting structure is coaxially arranged with the middle cylinder body, and the outer diameter of the middle cylinder limiting structure is adapted to the maximum outer diameter of the middle cylinder body.

5. The motor cooling housing structure according to claim 4, characterized in that: The middle cylinder limiting structure is provided with a plurality of connecting members, and the plurality of connecting members are sequentially arranged along the circumferential direction of the middle cylinder limiting structure.

6. The motor cooling housing structure according to claim 5, characterized in that: The outer cylinder includes an outer cylinder body and an outer cylinder limiting structure arranged at either end of the outer cylinder body, the outer cylinder limiting structure is coaxially arranged with the outer cylinder body, and the outer diameter of the outer cylinder limiting structure is adapted to the diameter of the outer cylinder body, and the outer cylinder body is provided with a water inlet connecting hole and a water outlet connecting hole, the water inlet connecting hole is used for connecting to the water inlet, and the water outlet connecting hole is used for connecting to the water outlet.

7. The motor cooling housing structure according to claim 6, characterized in that: The inner cylinder comprises an inner cylinder body and an inner cylinder limiting structure arranged at either end of the inner cylinder, the inner cylinder limiting structure is coaxially arranged with the inner cylinder body, and the inner diameter of the inner cylinder limiting structure is adapted to the diameter of the inner cylinder body, and a limiting piece is arranged on one side of the inner cylinder facing the stator to perform axial positioning on the stator when the stator is installed.

8. The motor cooling housing structure according to claim 7, characterized in that: The outer tube limiting structure is provided with a first positioning structure, the inner tube limiting structure is provided with a second positioning structure, and the middle tube limiting structure is provided with a third positioning structure. The first positioning structure is plugged and matched with the third positioning structure on the middle tube limiting structure at one end of the middle tube main body, and positioning is performed during the installation process of the outer tube and the middle tube. The second positioning structure is plugged and matched with the third positioning structure on the middle tube limiting structure at the other end of the middle tube main body, and positioning is performed during the installation process of the inner tube and the middle tube.

9. The motor cooling housing structure according to claim 1, characterized in that: The inner cylinder, the middle cylinder and the outer cylinder are prepared by stamping and winding a steel plate or an aluminum plate, or the inner cylinder, the middle cylinder and the outer cylinder are prepared by spinning a barrel material.

10. A motor, characterized in that: It comprises a motor cooling casing structure as described in any one of claims 1 to 9, a front end cover and a rear end cover arranged at both ends of the motor cooling casing structure, and a stator, wherein the stator is arranged in the inner tube, and the front end cover and the rear end cover are connected to the motor cooling casing structure through fixing parts.