An oil-cooled motor

Abstract

The present invention discloses an oil-cooled motor, which includes a housing and internal components disposed within the housing; an oil inlet for introducing cooling oil into the housing is provided at the top of the housing, and an oil outlet is provided at the bottom of the housing; it further includes an oil sump disposed at the bottom of the housing; an oil storage cavity is defined inside the oil sump, and the oil outlet communicates with the oil storage cavity; the cooling oil enters the interior of the housing through the oil inlet, cools and dissipates heat from the internal components, and then flows into the oil storage cavity from the oil outlet, so that the cooling oil accumulates in the oil storage cavity. By providing an oil sump at the bottom of the housing, the cooling oil introduced into the motor flows through the internal components and then into the oil storage cavity of the oil sump, thereby avoiding the vibration of the motor caused by the accumulation of cooling oil inside the motor and extending the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and more specifically to an oil-cooled motor. Background Art

[0002] When the motor is running, the motor body (components such as the iron core) will generate a large amount of heat. Excessive temperature will have a greater impact on the service performance and life of the motor. Currently, cooling oil is usually used to dissipate heat from the motor. Such a motor cooled by cooling oil is called an oil-cooled motor. However, the cooling oil in the existing oil-cooled motors cannot be discharged in time and will be squeezed inside the motor, resulting in vibration during the operation of the motor and affecting the service life of the motor. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an oil-cooled motor.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: An oil-cooled motor includes a housing and internal components disposed inside the housing; an oil inlet for introducing cooling oil into the housing is provided at the top of the housing, and an oil outlet is provided at the bottom of the housing; a fuel tank is also provided at the bottom of the housing; a storage cavity is defined inside the fuel tank, and the oil outlet communicates with the storage cavity; the cooling oil enters the interior of the housing through the oil inlet, cools and dissipates heat from the internal components, and then flows into the storage cavity from the oil outlet, so that the cooling oil accumulates in the storage cavity.

[0005] A further technical solution thereof is that the fuel tank and the housing are of an integrally formed structure.

[0006] A further technical solution thereof is that the internal components include an iron core, a first sliding bearing and a second sliding bearing located at both ends of the iron core; there are multiple oil inlets, namely a first oil inlet, a second oil inlet and a third oil inlet; there are multiple oil outlets, namely a first oil outlet, a second oil outlet, a third oil outlet and a fourth oil outlet; the cooling oil introduced from the first oil inlet flows to the first sliding bearing and flows into the storage cavity from the first oil outlet; the cooling oil introduced from the second oil inlet flows to the second sliding bearing and flows into the storage cavity from the second oil outlet; the cooling oil introduced from the third oil inlet flows to the iron core and flows into the storage cavity from the third oil outlet and the fourth oil outlet.

[0007] Its further technical solution is as follows: Multiple axial protrusions arranged along the axial direction of the iron core and multiple circumferential protrusions arranged along the circumferential direction of the iron core are provided on the surface of the iron core; A first end face edge is provided on one end face of the iron core in the axial direction by extending along the radial direction of the iron core, and a second end face edge is provided on the other end face of the iron core in the axial direction by extending along the radial direction of the iron core; Multiple said axial protrusions, multiple said circumferential protrusions, the first end face edge, and the second end face edge form multiple branch oil paths for the cooling oil to flow; An axial groove is further provided on the surface of the iron core along its axial direction, and the axial groove forms the main oil path for the cooling oil to enter; The oil path inlets of multiple said branch oil paths are all communicated with the main oil path, and the oil path outlets of multiple said branch oil paths are located on the first end face edge and / or the second end face edge; The third oil inlet is located above the main oil path.

[0008] Its further technical solution is as follows: There are four branch oil paths, namely the first branch oil path, the second branch oil path, the third branch oil path, and the fourth branch oil path; The oil path inlets of the first branch oil path and the third branch oil path are located on one side of the main oil path, and the oil path inlets of the second branch oil path and the fourth branch oil path are located on the other side of the main oil path.

[0009] Its further technical solution is as follows: The oil path outlets of the first branch oil path and the second branch oil path are located on the first end face edge, and the oil path outlets of the third branch oil path and the fourth branch oil path are located on the second end face edge; The oil path outlets of the first branch oil path and the second branch oil path correspond to the position of the third oil outlet, and the oil path outlets of the third branch oil path and the fourth branch oil path correspond to the position of the fourth oil outlet.

[0010] Its further technical solution is as follows: An oil groove is provided on the iron core along its circumferential direction, the oil groove surrounds the circumferential surface of the iron core, and multiple oil through holes are provided on the iron core at intervals around its center, and the oil through holes penetrate the axial length of the iron core and are communicated with the oil groove.

[0011] Its further technical solution is as follows: The oil groove is located at the center of the iron core in the axial direction.

[0012] Its further technical solution is as follows: Multiple oil grooves are provided on the iron core along its axial direction, multiple said oil grooves surround the outer peripheral surface of the iron core, the length of the oil groove is the same as the axial length of the iron core, and both ends of the oil groove are open.

[0013] Its further technical solution is as follows: Multiple said oil grooves are evenly spaced around the outer peripheral surface of the iron core.

[0014] The beneficial effects of the present invention compared with the prior art are as follows: An oil-cooled motor provided by the present invention is provided with an oil collecting tank at the bottom of the machine shell. The cooling oil flowing into the motor flows through the internal components and then flows into the oil storage cavity of the oil collecting tank, avoiding the vibration of the motor caused by the accumulation of cooling oil inside the motor and extending the service life of the motor.

[0015] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically given and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a device diagram of the first embodiment of an oil-cooled motor of the present invention;

[0017] Figure 2 It is an exploded view of the first embodiment of an oil-cooled motor of the present invention;

[0018] Figure 3 It is a partial schematic diagram of the machine shell in the first embodiment of an oil-cooled motor of the present invention Figure 1 ;

[0019] Figure 4 It is a partial schematic diagram of the machine shell in the first embodiment of an oil-cooled motor of the present invention Figure 2 ;

[0020] Figure 5 It is a partial schematic diagram of the machine shell in the first embodiment of an oil-cooled motor of the present invention Figure 2 (Another perspective);

[0021] Figure 6 It is a three-dimensional view of the iron core in the first embodiment of an oil-cooled motor of the present invention;

[0022] Figure 7 It is a three-dimensional view of the iron core from another perspective in the first embodiment of an oil-cooled motor of the present invention;

[0023] Figure 8 It is a three-dimensional view of the iron core in the second embodiment of an oil-cooled motor of the present invention;

[0024] Figure 9 It is a three-dimensional view of the iron core in the third embodiment of an oil-cooled motor of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to understand the technical content of the present invention more fully, the technical solution of the present invention will be further introduced and described below in conjunction with specific embodiments, but it is not limited thereto.

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0029] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0031] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0032] Embodiment 1

[0033] The present invention provides an oil-cooled motor. Please refer to Figure 1 , 5 , the oil-cooled motor includes a housing 1 and internal components provided in the housing 1; an oil inlet for introducing cooling oil into the housing 1 is provided at the top of the housing 1, and an oil outlet is provided at the bottom of the housing 1; it further includes an oil sump 2 provided at the bottom of the housing 1; an oil storage cavity 21 is defined inside the oil sump 2, and the oil outlet communicates with the oil storage cavity 21; the cooling oil enters the inside of the housing 1 through the oil inlet to cool and dissipate heat from the internal components and then flows into the oil storage cavity 21 from the oil outlet, so that the cooling oil accumulates in the oil storage cavity 21. Due to the provision of the oil sump 2, therefore, the vibration of the motor caused by the accumulation of cooling oil inside the motor is avoided, thereby extending the service life of the motor.

[0034] Preferably, for the convenience of manufacturing and reducing production costs, the oil sump 2 and the housing 1 are of an integrally formed structure. Of course, in other embodiments, they can be manufactured separately and then assembled.

[0035] Specifically, please refer to Figures 2 - 4, the internal components include an iron core 3, a first sliding bearing 4 and a second sliding bearing 5 located at both ends of the iron core 3; there are multiple oil inlets, namely a first oil inlet 11, a second oil inlet 13 and a third oil inlet 12 respectively; there are multiple oil outlets, namely a first oil outlet 14, a second oil outlet 16, a third oil outlet 16 and a fourth oil outlet 17 respectively; the cooling oil introduced from the first oil inlet 11 flows to the first sliding bearing 4 and flows into the oil storage cavity 21 from the first oil outlet 14; the cooling oil introduced from the second oil inlet 13 flows to the second sliding bearing 5 and flows into the oil storage cavity 21 from the second oil outlet 16; the cooling oil introduced from the third oil inlet 12 flows to the iron core 3 and flows into the oil storage cavity 21 from the third oil outlet 16 and the fourth oil outlet 17. In the motor, mainly the heat generated by the iron core 3 and the bearings is relatively large. Therefore, the cooling oil is mainly introduced to dissipate heat from the iron core 3 and the bearings. By introducing the cooling oil from different oil inlets respectively, heat dissipation for the bearings and the iron core 3 is achieved. It should be noted that the oil inlets are arranged at the top of the housing 1, and the oil outlets are arranged at the bottom of the housing 1. The purpose of this is to make the cooling oil flow over a wider area or for a longer time on the bearings or the iron core 3, so that the heat dissipation effect is better.

[0036] Please refer to Figure 6 , 7 , multiple axial protrusions arranged along the axial direction of the iron core 3 and multiple circumferential protrusions arranged along the circumferential direction of the iron core 3 are provided on the surface of the iron core 3; a first sliding bearing 36 is extended and provided along the radial direction of the iron core 3 at one axial end face of the iron core 3, and a second end face edge 37 is extended and provided along the radial direction of the iron core 3 at the other axial end face of the iron core 3; the multiple axial protrusions, the multiple circumferential protrusions, the first sliding bearing 36 and the second end face edge 37 form multiple branch oil paths for the cooling oil to flow; an axial groove 31 is further provided on the surface of the iron core 3 along its axial direction, and the axial groove 31 forms the main oil path for the cooling oil to enter; the oil path inlets of the multiple branch oil paths are all communicated with the main oil path, and the oil path outlets of the multiple branch oil paths are located on the first sliding bearing 36 and / or the second end face edge 37; the third oil inlet 12 is located above the main oil path. Through the multiple branch oil paths formed on the surface of the iron core 3, the cooling oil flows through the outer surface of the iron core 3 through the multiple branch oil paths, thereby achieving sufficient heat dissipation for the iron core 3, having a good cooling effect, and not requiring additional components for auxiliary heat dissipation, reducing the cost.

[0037] In this embodiment, there are four branch oil paths, namely the first branch oil path 32, the second branch oil path 33, the third branch oil path 34, and the fourth branch oil path 35. The oil path inlets of the first branch oil path 32 and the third branch oil path 34 are located on one side of the main oil path, and the oil path inlets of the second branch oil path 33 and the fourth branch oil path 35 are located on the other side of the main oil path. Additionally, the oil path outlet 361 of the first branch oil path and the oil path outlet 362 of the second branch oil path are located on the first end face rib 36, and the oil path outlet 371 of the third branch oil path and the oil path outlet 372 of the fourth branch oil path are located on the second end face rib 37. The oil path outlets of the first branch oil path 32 and the second branch oil path 33 correspond to the position of the third oil outlet 16, and the oil path outlets of the third branch oil path 34 and the fourth branch oil path 35 correspond to the position of the fourth oil outlet 17.

[0038] Preferably, the first sliding bearing 36 and the second end face rib 37 have the same height. The height of the axial protrusion and the circumferential protrusion is less than or equal to the height of the first sliding bearing 36.

[0039] In other embodiments, the number of branch oil paths can be determined according to design requirements, such as designed to be 2, 3, 5, etc.

[0040] Embodiment 2

[0041] The difference between this embodiment and Embodiment 1 lies in the different oil path structures of the iron core 6. Please refer to Figure 8 , in this embodiment, the iron core 6 is provided with an oil groove 61 along its circumferential direction. The oil groove 61 surrounds the circumferential surface of the iron core 6. A plurality of oil through holes 62 are provided on the iron core 6 at intervals around its center. The oil through holes 62 penetrate the axial length of the iron core 6 and communicate with the oil groove 61. By providing the oil groove 61 in the circumferential direction of the iron core 6 and providing the oil through holes 62 at intervals in the axial direction, the cooling oil flows into the oil through holes 62 after entering the oil groove 61, thereby realizing sufficient heat dissipation of the iron core 6, having a good cooling effect, and without the need to set additional components for auxiliary heat dissipation, reducing the cost. Additionally, since the oil through holes 62 are provided inside the iron core 6 and penetrate the axial length of the iron core 6, the flow area of the cooling oil is increased, which is more conducive to heat dissipation.

[0042] Preferably, the oil groove 61 is located at the center of the iron core 6 in the axial direction, so that the lengths of the oil through holes 62 on both sides of the oil groove 61 are the same, which is conducive to the cooling oil evenly dissipating heat from the iron core 6 after entering the oil through holes 62. The oil through holes 62 are evenly spaced near the outer peripheral edge of the iron core 6. In this embodiment, the oil through holes 62 are circular.

[0043] In some embodiments, such as in the present embodiment, the iron core 6 is provided with axial grooves 63 for the flow of cooling oil along its axial direction, and the axial grooves 63 are located outside the oil through holes 62. The provided axial grooves 63 can further improve the heat dissipation efficiency. Preferably, the bottom of the axial grooves 63 is in an arc shape, and being set as a circular shape facilitates the flow of the cooling oil.

[0044] Embodiment Three

[0045] The difference between this embodiment and Embodiment One lies in the oil circuit structure cylinder of the iron core 7. Please refer to Figure 9 , the iron core 7 of this embodiment is provided with a plurality of oil grooves 71 along its axial direction. The plurality of oil grooves 71 surround the outer peripheral surface of the iron core 7. The length of the oil grooves 71 is the same as the axial length of the iron core 7 and both ends of the oil grooves 71 are open. By arranging a plurality of oil grooves 71 in the axial direction of the iron core 7, after the cooling oil enters the oil grooves 71, the iron core 7 can be fully cooled, the cooling effect is good, and there is no need to set additional components for auxiliary heat dissipation, reducing the cost.

[0046] Preferably, the plurality of oil grooves 71 are evenly spaced around the outer peripheral surface of the iron core 7. Evenly arranging the oil grooves 71 is beneficial to evenly dissipating heat from the iron core 7.

[0047] Furthermore, the oil grooves 71 are in a U shape, and the two sides and the bottom of the oil grooves 71 form a 90° angle.

[0048] The above only further illustrates the technical content of the present invention with embodiments to make it easier for readers to understand, but it does not mean that the implementation manners of the present invention are limited to this. Any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. An oil-cooled motor, characterized in that, It includes a housing and internal components disposed within the housing; an oil inlet for introducing cooling oil into the housing is provided at the top of the housing, and an oil outlet is provided at the bottom of the housing; it further includes an oil collecting tank disposed at the bottom of the housing; a storage oil cavity is defined inside the oil collecting tank, and the oil outlet communicates with the storage oil cavity; the cooling oil enters the interior of the housing through the oil inlet, cools and dissipates heat from the internal components, and then flows into the storage oil cavity from the oil outlet, so that the cooling oil accumulates in the storage oil cavity; the oil collecting tank and the housing are of an integrally formed structure; the internal components include an iron core, and a first sliding bearing and a second sliding bearing located at both ends of the iron core; there are multiple oil inlets, namely a first oil inlet, a second oil inlet, and a third oil inlet respectively; there are multiple oil outlets, namely a first oil outlet, a second oil outlet, a third oil outlet, and a fourth oil outlet respectively; the cooling oil introduced from the first oil inlet flows towards the first sliding bearing and flows into the storage oil cavity from the first oil outlet; the cooling oil introduced from the second oil inlet flows towards the second sliding bearing and flows into the storage oil cavity from the second oil outlet; the cooling oil introduced from the third oil inlet flows towards the iron core and flows into the storage oil cavity from the third oil outlet and the fourth oil outlet; multiple axial protrusions arranged along the axial direction of the iron core and multiple circumferential protrusions arranged along the circumferential direction of the iron core are provided on the surface of the iron core; a first end face edge is extended along the radial direction of the iron core at one axial end face of the iron core, and a second end face edge is extended along the radial direction of the iron core at the other axial end face of the iron core; the multiple axial protrusions, the multiple circumferential protrusions, the first end face edge, and the second end face edge constitute multiple branch oil paths for the flow of cooling oil; an axial groove is further provided on the surface of the iron core along its axial direction, and the axial groove constitutes the main oil path for the cooling oil to enter; the oil path inlets of the multiple branch oil paths are all connected to the main oil path, and the oil path outlets of the multiple branch oil paths are located on the first end face edge and / or the second end face edge; the third oil inlet is located above the main oil path.

2. The oil-cooled motor according to claim 1, characterized in that, There are four branch oil paths, namely a first branch oil path, a second branch oil path, a third branch oil path, and a fourth branch oil path respectively; the oil path inlets of the first branch oil path and the third branch oil path are located on one side of the main oil path, and the oil path inlets of the second branch oil path and the fourth branch oil path are located on the other side of the main oil path.

3. The oil-cooled motor according to claim 2, wherein The oil path outlets of the first branch oil path and the second branch oil path are located on the first end face edge, and the oil path outlets of the third branch oil path and the fourth branch oil path are located on the second end face edge; the oil path outlets of the first branch oil path and the second branch oil path correspond to the position of the third oil outlet, and the oil path outlets of the third branch oil path and the fourth branch oil path correspond to the position of the fourth oil outlet.

4. An oil-cooled motor according to claim 1, characterized in that, An oil groove is provided on the iron core along its circumferential direction, the oil groove surrounds the circumferential surface of the iron core, and multiple oil through holes are provided on the iron core at intervals around its center, and the oil through holes penetrate the axial length of the iron core and communicate with the oil groove.

5. The oil-cooled motor according to claim 4, wherein The oil groove is located at the center of the axial direction of the iron core.

6. The oil-cooled motor according to claim 1, characterized in that, The iron core is provided with a plurality of oil grooves along its axial direction, and the plurality of oil grooves surround the outer peripheral surface of the iron core. The length of the oil groove is the same as the axial length of the iron core, and both ends of the oil groove are open.

7. The oil-cooled motor according to claim 6, characterized in that, The plurality of oil grooves are evenly spaced around the outer peripheral surface of the iron core.

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