Air-cooled motor

Abstract

The utility model discloses an air-cooled motor, comprising a motor assembly which comprises a rotor assembly and a stator assembly which are cooperatively used, a front end cover connected with one shaft side end of the stator assembly, and a rear end cover connected with the other shaft side end of the stator assembly; the fan is arranged on one end part, penetrating through the rear end cover, of the output shaft of the rotor assembly; and the wind scooper covers the outer sides of the fan, the rear end cover and the stator assembly. According to the utility model, on one hand, the structure of the whole motor assembly is simplified, the production and assembly cost is reduced, and the air cooling efficiency of the motor assembly can be accelerated.

Description

Technical Field

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

[0002] When converting electrical energy into mechanical energy, the motor will have a certain degree of energy loss, which will increase the temperature of the motor in the form of heat energy. Therefore, the motor is usually equipped with a cooling component to adjust the operating temperature of the motor to ensure the normal operation of the motor. Air cooling is the most common form of motor cooling.

[0003] In this regard, for example, a motor with a high-efficiency air-guiding hood is disclosed in the announcement number CN 208112400 U, which includes a casing, a front cover, a rear cover, a shaft, a stator assembly, a rotor assembly, a fan and a hood. The inner wall of the casing is tightly fitted with the stator assembly, and the outer wall of the shaft is tightly fitted with the rotor assembly. An air gap is formed between the stator assembly and the rotor assembly. The front end of the casing is fixed with the front cover, the rear end of the casing is fixed with the rear cover, the rear part of the shaft is installed with a fan, the hood is fixed on the rear cover, and the outer wall of the casing is evenly distributed with heat dissipation strips in the circumferential direction. Another example is a motor with a detachable cooling fan disclosed in the announcement number CN215072008U, which also includes a casing, a stator, a rotor, a main shaft and a fan. The stator here is arranged in the casing, and the cooling process of the stator also needs to pass through the heat transfer process of the casing.

[0004] There are numerous air-cooled motors with structures similar to the above. For the heat dissipation of the stator assembly under this structure, it needs to be achieved through the transfer effect of the casing. That is to say, the cooling air generated by the fan cannot directly cool the stator assembly. At this time, the cooling efficiency of the stator assembly will also be affected by the heat transfer efficiency of the motor casing.

[0005] Therefore, in order to improve the cooling effect of the air-cooled motor, its structure needs to be further optimized. Utility Model Content

[0006] The first purpose of the utility model is to provide an air-cooled motor to solve the technical problem of improving the cooling efficiency thereof.

[0007] The air-cooled motor of the utility model is realized as follows:

[0008] An air-cooled motor, comprising:

[0009] A motor assembly, comprising a rotor assembly and a stator assembly for use together, a front end cover connected to one axial side end of the stator assembly, and a rear end cover connected to the other axial side end of the stator assembly;

[0010] A fan, which is provided on one end of the output shaft of the rotor assembly passing through the rear end cover;

[0011] The air guide cover is arranged on the outside of the fan, the rear end cover and the stator assembly.

[0012] In an optional implementation of the utility model, the front end cover, the stator assembly and the rear end cover are connected by a fastener group;

[0013] The fastener group includes at least three fastening connectors spaced apart along the circumferential side of the stator assembly;

[0014] The front end cover, the stator assembly and the rear end cover are all provided with connection holes for matching the fastening connectors.

[0015] In an optional implementation of the utility model, a first sealing ring is provided between the assembly surface of the stator assembly and the front end cover; and

[0016] A second sealing ring is provided between the assembly surface of the stator assembly and the rear end cover.

[0017] In an optional implementation of the utility model, a first positioning groove for positioning the first sealing ring is concavely provided on the assembly surface of the front end cover adapted to the stator assembly;

[0018] A second positioning groove for positioning the second sealing ring is concavely provided on the assembly surface of the rear end cover adapted to the stator assembly.

[0019] In an optional implementation of the utility model, the outer circumferential side of the stator assembly is provided with a plurality of installation angles extending along the axial direction of the stator assembly at intervals;

[0020] The connection hole is provided through the installation angle; and

[0021] The front end cover and the rear end cover are respectively provided with a plurality of connecting ears which match with the plurality of installation angles one-to-one, and each of the connecting ears is provided with the connecting hole.

[0022] In an optional implementation of the utility model, an air inlet mesh plate is provided on the axial side end of the air guide cover facing the fan.

[0023] In an optional implementation of the utility model, the air guide cover is a cylindrical body with one end being open; and

[0024] The air guide cover is firmly connected with the rear end cover.

[0025] In an optional implementation of the utility model, the front end cover is provided with a front shaft hole suitable for the output shaft to pass through, and the front end cover is also provided with a bearing chamber for assembling a first bearing connected to the output shaft;

[0026] The inner wall of the bearing chamber is provided with a first guide groove communicating with the front shaft hole, and the side wall of the bearing chamber is formed with a first drip hole communicating with the first guide groove; and

[0027] The inner side wall of the front end cover is also provided with a second guide groove connected with the first drip hole; and

[0028] A second drip hole connected to the second guide groove is formed through the inner side wall of the front end cover.

[0029] In an optional implementation of the utility model, the rear end cover is provided with a rear shaft hole suitable for the output shaft to pass through; and

[0030] A raised annular waterproof platform is provided on the end surface of the rear end cover facing the fan and on the circumferential side of the rear shaft hole.

[0031] In an optional implementation of the present invention, the outer side wall of the front end cover is also connected to the junction box; and

[0032] The outer side wall of the front end cover is also connected with a mounting plate.

[0033] By adopting the above technical solution, the utility model has the following beneficial effects: the air-cooled motor of the utility model eliminates the motor housing in the traditional motor assembly, which simplifies the structure of the overall motor assembly and reduces the cost of production and assembly. At the same time, it can speed up the air cooling efficiency of the stator assembly and avoid the problem of long heat conduction chain caused by the transfer of the motor housing in traditional technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the structure of the air-cooled motor of the utility model from a first perspective;

[0035] Figure 2 This is a second perspective structural diagram of the air-cooled motor of the utility model;

[0036] Figure 3 It is a schematic cross-sectional view of the air-cooled motor of the utility model;

[0037] Figure 4 This is a schematic diagram of the exploded structure of the air-cooled motor of the utility model;

[0038] Figure 5 It is a structural schematic diagram of the air guide cover of the air-cooled motor of the utility model;

[0039] Figure 6 It is a structural schematic diagram of the stator assembly of the air-cooled motor of the utility model;

[0040] Figure 7 This is a schematic structural diagram of the rear end cover of the air-cooled motor of the utility model from a first perspective;

[0041] Figure 8It is a second perspective structural schematic diagram of the rear end cover of the air-cooled motor of the utility model;

[0042] Fig. 9 It is a schematic structural diagram of the front end cover of the air-cooled motor of the utility model.

[0043] In the figure: rotor assembly 1, stator assembly 2, front cover 3, rear cover 4, long screw 5, connecting hole 6, mounting angle 7, connecting ear 8, first sealing ring 9, second sealing ring 10, output shaft 11, fan 12, air guide cover 13, air inlet mesh plate 14, front shaft hole 15, bearing chamber 16, first guide groove 17, first drip hole 18, second guide groove 19, second drip hole 20, rear shaft hole 21, annular waterproof platform 22, supporting rib 23, mounting plate 24, junction box 25, first positioning groove 26, second positioning groove 27. DETAILED DESCRIPTION

[0044] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0045] Embodiment 1:

[0046] See also Figures 1 to 9 As shown, this embodiment provides an air-cooled motor, including: a motor assembly, a fan 12 and an air guide cover 13 used in conjunction with the motor assembly. The motor assembly includes: a rotor assembly 1 and a stator assembly 2 used in conjunction, a front end cover 3 connected to one axial side end of the stator assembly 2, and a rear end cover 4 connected to the other axial side end of the stator assembly 2.

[0047] The fan 12 is arranged on the end of the output shaft 11 of the rotor assembly 1 that passes through the rear end cover 4, and the air guide cover 13 is arranged on the outside of the fan 12, the rear end cover 4 and the stator assembly 2. When the output shaft 11 rotates, the fan 12 draws air from the rear of the rear end cover 4 and blows it toward the front end cover 3 to achieve cooling of the stator assembly 2.

[0048] On the basis of the above structure, from the perspective of simplifying the assembly process, in an optional implementation, the front cover 3, the stator assembly 2 and the rear cover 4 in this embodiment are connected by a fastener group; the fastener group includes at least three fastening connectors spaced along the circumferential side of the stator assembly 2; the front cover 3, the stator assembly 2 and the rear cover 4 are all provided with connection holes 6 for matching the fastening connectors. The fastening connectors here can be optionally long screws 5. That is to say, the front cover 3, the stator assembly 2 and the rear cover 4 can be fastened relatively to each other at the same time, without the need to fasten and assemble them two by two separately.

[0049] In more detail, with reference to the accompanying drawings, an optional implementation is given as an example. With respect to the design of the connecting hole 6, a plurality of mounting angles 7 extending axially along the stator assembly 2 are provided at intervals on the outer circumferential side of the stator assembly 2; a connecting hole 6 is penetrated through the mounting angles 7; and a plurality of connecting ears 8 that match the plurality of mounting angles 7 one-to-one are provided on the front end cover 3 and the rear end cover 4, respectively, and a connecting hole 6 is provided in each connecting ear 8.

[0050] Based on the above situation, in order to improve the waterproofness of the overall motor assembly, a first sealing ring 9 is provided between the assembly surfaces of the stator assembly 2 and the front end cover 3 of this embodiment; and a second sealing ring 10 is provided between the assembly surfaces of the stator assembly 2 and the rear end cover 4.

[0051] In more detail, with reference to the accompanying drawings and taking an optional embodiment as an example, a first positioning groove 26 for positioning the first sealing ring 9 is recessed on the assembly surface of the front end cover 3 adapted to the stator assembly 2; a second positioning groove 27 for positioning the second sealing ring 10 is recessed on the assembly surface of the rear end cover 4 adapted to the stator assembly 2.

[0052] Next, it is explained that the air guide cover 13 in this embodiment is a cylindrical body with one end open, and the air guide cover 13 is fastened to the rear end cover 4. An air inlet mesh plate 14 is provided on the axial side of the air guide cover 13 facing the fan 12.

[0053] The air guide cover 13 used in this embodiment is integrally provided with an air inlet mesh plate 14, so that there is no need to design a separate protective cover for the fan 12. Such a design can not only simplify the production process of the air cover structure of the air-cooled motor, but also simplify the assembly process of the air-cooled motor, thereby reducing production costs.

[0054] Here, an optional implementation is given in conjunction with the accompanying drawings. The air guide cover 13 of this embodiment can be optionally directly connected to the connecting ear 8 of the rear end cover 4 by screws, that is, the stator assembly 2 and the air guide cover 13 are matched at the same time by the connecting ear 8, which can directly simplify the structure of the air-cooled motor. In this regard, it is necessary to explain that since the installation angle 7 of the stator assembly 2 is convex relative to the outer circumferential side of the stator assembly 2, and the connecting ear 8 is directly matched with the installation angle 7, the connecting ear 8 is also convex relative to the outer circumferential side of the stator assembly 2. Therefore, when the air guide cover 13 and the connecting ear 8 are fastened together, a circulation channel suitable for the wind blown out by the fan 12 can be formed between the inner wall of the air guide cover 13 and the outer circumferential side of the stator assembly 2, thereby avoiding the cumbersomeness of designing a ventilation duct in the air guide cover 13.

[0055] In summary, for the motor assembly adopted in this embodiment, the motor housing in the traditional motor assembly is eliminated, and the front end cover 3 and the rear end cover 4 are directly assembled with the stator assembly 2, which not only simplifies the structure and reduces production costs, but also speeds up the air cooling efficiency of the stator assembly 2 and avoids the problem of long cooling air conduction chain due to the transmission of the motor housing in traditional technology.

[0056] Embodiment 2:

[0057] See also Figures 1 to 9 As shown, based on the cold motor of embodiment 1, the air-cooled motor provided in this embodiment is designed as follows in order to improve the waterproofness of the overall air-cooled motor:

[0058] First, the front end cover 3 is provided with a front shaft hole 15 suitable for the output shaft 11 to pass through, and the front end cover 3 is also provided with a bearing chamber 16 for assembling a first bearing connected to the output shaft 11; the inner wall of the bearing chamber 16 is provided with a first guide groove 17 connected to the front shaft hole 15, and the side wall of the bearing chamber 16 is penetrated with a first drip hole 18 connected to the first guide groove 17; and the inner side wall of the front end cover 3 is also provided with a second guide groove 19 connected to the first drip hole 18; the inner side wall of the front end cover 3 is penetrated with a second drip hole 20 connected to the second guide groove 19.

[0059] It should be noted that the extension direction of the first guide groove 17 and the second guide groove 19 in the present embodiment is mainly determined in combination with the viewing angle during the use of the overall air-cooled motor. For example, the axial direction of the stator assembly 2 of a conventional air-cooled motor is parallel to the support surface during use, that is, the air-cooled motor is in a horizontal state. At this time, the first guide groove 17 and the second guide groove 19 both extend downward along the radial direction of the stator assembly 2, and the first drip hole 18 is located in the liquid flow direction of the first guide groove 17, and the second drip hole 20 is located in the liquid flow direction of the second guide groove 19.

[0060] Based on the above structure, the condensed water that penetrates into the bearing chamber 16 after passing through the first shaft outlet hole can flow smoothly to the outside of the front end cover 3 along the first guide groove 17, the first drip hole 18, the second guide groove 19 and the second drip hole 20 under the action of the gravity of the condensed water, thereby preventing the condensed water from penetrating into the stator assembly 2.

[0061] Secondly, the rear end cover 4 is provided with a rear shaft hole 21 suitable for the output shaft 11 to pass through; and a raised annular waterproof platform 22 is provided on the end surface of the rear end cover 4 facing the fan 12 and located on the circumferential side of the rear shaft hole 21. Under this structure, when condensed water appears on the outside of the rear end cover 4, it flows downward under the influence of gravity and is diverted along the outer wall of the annular waterproof platform 22, thereby preventing the condensed water from entering the second shaft hole and affecting the service life of the air-cooled motor.

[0062] In addition, still in combination with the horizontal use state of the overall stator assembly 2, in order to avoid the stator assembly 2 from directly pressing on the inner wall of the air guide cover 13 and affecting the circulation of the wind blown by the fan 12 in the air guide cover 13, the inner wall of the air guide cover 13 of this embodiment is provided with spaced support ribs 23 at least on the wall surface of the bottom end portion when the stator assembly 2 is horizontally placed. At this time, for the wall surface of the top end portion when the stator assembly 2 is horizontally placed, even if the support ribs 23 are not provided, the matching state between the air guide cover 13 and the stator assembly 2 can be maintained by the fixed connection between the air guide cover 13 and the rear end cover 4.

[0063] Finally, regarding the air-cooled motor of this embodiment, the outer side wall of the front end cover 3 of this embodiment is also connected to the terminal box 25 to meet the wiring requirements of the air-cooled motor; and the outer side wall of the front end cover 3 is also connected to the mounting plate 24. The design of the mounting plate 24 here facilitates fixing the air-cooled motor of this embodiment to a specific application scenario.

[0064] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0065] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are 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 therefore cannot be understood as a limitation on the present invention.

[0066] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0068] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0069] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. An air-cooled motor, characterized in that: include: A motor assembly, comprising a rotor assembly and a stator assembly for use together, a front end cover connected to one axial side end of the stator assembly, and a rear end cover connected to the other axial side end of the stator assembly; A fan, which is provided on one end of the output shaft of the rotor assembly passing through the rear end cover; The air guide cover is arranged on the outside of the fan, the rear end cover and the stator assembly.

2. The air-cooled motor according to claim 1, characterized in that: The front end cover, the stator assembly and the rear end cover are connected by a fastener group; The fastener group includes at least three fastening connectors spaced apart along the circumferential side of the stator assembly; The front end cover, the stator assembly and the rear end cover are all provided with connection holes for matching the fastening connectors.

3. The air-cooled motor according to claim 1, characterized in that: A first sealing ring is provided between the assembly surface of the stator assembly and the front end cover; and A second sealing ring is provided between the assembly surface of the stator assembly and the rear end cover.

4. The air-cooled motor according to claim 3, characterized in that: The assembly surface of the front end cover adapted to the stator assembly is concavely provided with a first positioning groove for positioning the first sealing ring; A second positioning groove for positioning the second sealing ring is concavely provided on the assembly surface of the rear end cover adapted to the stator assembly.

5. The air-cooled motor according to claim 2, characterized in that: The outer circumferential side of the stator assembly is provided with a plurality of installation angles extending in the axial direction of the stator assembly at intervals; The connection hole is provided through the installation angle; and The front end cover and the rear end cover are respectively provided with a plurality of connecting ears which match with the plurality of installation angles one-to-one, and each of the connecting ears is provided with the connecting hole.

6. The air-cooled motor according to claim 1, characterized in that: An air inlet mesh plate is provided on the axial side end of the air guide cover facing the fan.

7. The air-cooled motor according to claim 1 or 6, characterized in that: The air guide cover is a cylindrical body with one end being open; and The air guide cover is firmly connected with the rear end cover.

8. The air-cooled motor according to claim 1, characterized in that: The front end cover is provided with a front shaft hole suitable for the output shaft to pass through, and the front end cover is also provided with a bearing chamber for assembling a first bearing connected to the output shaft; The inner wall of the bearing chamber is provided with a first guide groove communicating with the front shaft hole, and the side wall of the bearing chamber is formed with a first drip hole communicating with the first guide groove; and The inner side wall of the front end cover is also provided with a second guide groove connected with the first drip hole; and A second drip hole connected to the second guide groove is formed through the inner side wall of the front end cover.

9. The air-cooled motor according to claim 1, characterized in that: The rear end cover is provided with a rear shaft hole suitable for the output shaft to pass through; and A raised annular waterproof platform is provided on the end surface of the rear end cover facing the fan and on the circumferential side of the rear shaft hole.

10. The air-cooled motor according to claim 1, characterized in that: The outer side wall of the front end cover is also connected to the junction box; and The outer side wall of the front end cover is also connected with a mounting plate.

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