Motor heat dissipation structure and integrated motor

Abstract

The utility model relates to motor technical field, concretely relates to a motor heat dissipation structure and integral motor, the motor heat dissipation structure includes motor body, fan blade and controller, wherein, the motor body includes machine shell and pivot, the machine shell is sealed and is filled with cooling oil, the pivot extends to the outside of machine shell, the fan blade sets up the outside of machine shell, and is assembled on the pivot with rotation, the controller is directly or indirectly installed in the motor body, the airflow can pass through the controller and the outside of machine shell and carries out heat dissipation when the fan blade rotates, the utility model provides a motor heat dissipation structure and integral motor, and the outside of motor body and the controller can be heat dissipated through the fan blade, and the heat dissipation effect of the whole motor is improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a motor heat dissipation structure and an integrated motor. Background Technology

[0002] Traditional brushed series motors require frequent maintenance and have a short lifespan; traditional asynchronous motors are generally large in size and have certain limitations in control. In contrast, brushless motors are more efficient, have a longer lifespan, and are easier to control precisely.

[0003] Brushless motors include air-cooled and oil-cooled types. Air-cooled brushless motors have blades mounted on their shafts. To achieve adequate heat dissipation, their rotational speed is generally designed to be relatively high, resulting in significant noise. Furthermore, for medium-speed applications, a reduction gear is required, increasing their size. Oil-cooled brushless motors, on the other hand, offer better cooling, can operate stably at medium speeds, and are smaller and quieter.

[0004] However, existing oil-cooled brushless motors still have some problems: 1. Although the motor body can be cooled by filling it with cooling oil, the efficiency of heat exchange between the housing and the external air is low, and the heat dissipation effect is still not ideal; 2. Although the motor body can be cooled, the controller part located outside the motor body cannot be cooled well. Utility Model Content

[0005] This invention addresses the technical problems of existing oil-cooled brushless motors, such as the controller lacking heat dissipation function and the overall heat dissipation effect still being unsatisfactory. It proposes a motor heat dissipation structure and an integrated motor, which uses fan blades to dissipate heat from the exterior of the motor body and the controller, thereby improving the overall heat dissipation effect of the motor.

[0006] The technical solution of this utility model: A motor heat dissipation structure, comprising: The motor body includes a housing and a rotating shaft. The housing is sealed with cooling oil, and the rotating shaft extends to the outside of the housing. The fan blade is disposed outside the housing and is mounted on the rotating shaft. The controller is directly or indirectly installed on the motor body, and the airflow can dissipate heat from the controller and the outside of the housing when the fan blades rotate.

[0007] Furthermore, the non-drive end of the rotating shaft extends outside the housing, and the fan blade is mounted on the non-drive end of the rotating shaft as it rotates; the controller is located on the rear side of the fan blade.

[0008] Furthermore, the motor heat dissipation structure also includes an air guide shroud, which covers the outer periphery of the fan blade and the controller, and forms a radial airflow channel for air intake or exhaust between the fan blade and the controller.

[0009] Furthermore, the air guide cover includes a rear cover and an electrical control box. The rear cover is mounted on the rear side of the housing and surrounds the radial outer side of the fan blade. The controller is installed inside the electrical control box. The rear cover is connected to the electrical control box, and a certain gap is left between the rear cover and the electrical control box to form the airflow channel.

[0010] Furthermore, an air inlet is provided in the middle of the rear end face of the rear cover, the fan blade is a centrifugal fan blade, and multiple axially extending and circumferentially arranged heat-conducting fins are formed on the outer side wall of the housing. The airflow enters from the airflow channel and the air inlet, passes through the centrifugal fan blade, and is blown towards the heat-conducting fins.

[0011] Furthermore, the motor heat dissipation structure also includes a heat dissipation plate, the controller is mounted on the heat dissipation plate or in thermal contact with the heat dissipation plate, the heat dissipation plate is disposed between the fan blade and the controller; multiple heat dissipation fins are also formed on the heat dissipation plate facing the fan blade.

[0012] Furthermore, the plurality of heat dissipation fins are arranged circumferentially, and each heat dissipation fin points to the center position.

[0013] Furthermore, the electrical control box includes a box body and a cover located on the rear side. An opening is formed on the side of the box body facing the rear cover. The heat sink is installed on the box body and covers the opening. A sealing ring is provided between the heat sink and the box body. The controller inside the box body is potted with glue.

[0014] Furthermore, the housing includes a front cover, a middle housing, and a rear cover that are sealed together. The rear cover is mounted on the rear cover, and the radial outer edge of the rear cover is provided with a flow hole for airflow. The rear end cover is also equipped with an oil cup; The rear end cover is also sealed with a plug, one end of which extends into the inside of the housing and is electrically connected to the motor lead wire, and the other end extends out of the housing. An oil seal is provided between the rotating shaft and the front end cover; a mechanical seal is provided between the rotating shaft and the rear end cover, and the middle part of the rear end cover protrudes rearward to form a receiving cavity, the receiving cavity containing the mechanical seal.

[0015] In another aspect, this utility model provides an integrated motor, including a motor body and a controller, wherein the integrated motor adopts a motor heat dissipation structure as described in any of the above.

[0016] After adopting the above technical solution, the motor heat dissipation structure and integrated motor provided by this utility model have the following beneficial effects compared with the prior art: the motor body of this utility model is oil-cooled, with small overall size and low noise; and the fan blades accelerate the airflow on the outside of the motor body, increasing the efficiency of heat exchange and improving the heat dissipation effect; in addition, the fan blades also dissipate heat from the controller, improving the overall heat dissipation effect of the integrated motor. Attached Figure Description

[0017] Figure 1 This is a perspective view of the integrated motor of this utility model from a first-person perspective. Figure 2 This is a perspective view of the integrated motor of this utility model from a second-view perspective. Figure 3 This is a cross-sectional view of the integrated motor of this utility model; Figure 4 This is a perspective view of the motor body of this utility model; Figure 5 This is a perspective view of the rear end cap, oil cup, and insert of this utility model; Figure 6 This is an exploded view of the rear end cover, oil cup, and insert of this utility model from a first-view perspective; Figure 7 This is an exploded view of the rear end cap, oil cup, and insert of this utility model from a second perspective. Figure 8 This is a schematic diagram of the structure of the rear cover, electrical control box, controller and heat sink of this utility model; Figure 9 This is an exploded view of the rear cover, electrical control box, controller, and heat sink of this utility model from a first-person perspective. Figure 10 This is an exploded view of the rear cover, electrical control box, controller, and heat sink of this utility model from a second perspective.

[0018] in, Motor body 1, housing 11, front cover 111, middle housing 112, heat-conducting fins 1121, rear cover 113, flow hole 1131, receiving cavity 1132, mounting groove 1133; stator 12, rotor 13, rotating shaft 14; fan blade 2; controller 3, power device 31; airflow channel 4; rear cover 5, protrusion 51, air inlet 52; electrical control box 6, box body 61, protrusion 611, opening 612, cover 62, sealing ring 63; heat sink 7, heat sink fins 71, groove 72; oil seal 81, mechanical seal 82, oil cup 83, pressure cover 84, insert 85, insulating pressure plate 86, blocking protrusion 861, sealing sleeve 87, pressing edge 871, middle sleeve 872, oil filling sealing screw 88. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0022] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0023] This embodiment provides a motor heat dissipation structure that can be used in brushless motors and other integrated motors including a motor body 1 and a controller 3. This motor heat dissipation structure enables both the motor body 1 and the controller 3 to be well cooled.

[0024] Specifically, such as Figure 1-4As shown, the motor heat dissipation structure includes a motor body 1 and a controller 3. The motor body 1 includes a housing 11, and the housing 11 contains components such as a stator 12, a rotor 13, and a rotating shaft 14. The housing 11 is sealed with cooling oil, making the motor body 1 an internally oil-cooled motor. At least one end of the rotating shaft 14, for example, its rear end, extends to the outside of the housing 11. The portion of the rotating shaft 14 located outside the housing 11 is also equipped with a fan blade 2. When the rotating shaft 14 rotates, the fan blade 2 rotates with the rotating shaft 14.

[0025] Furthermore, the controller 3 is used to control the operation of the motor body 1. The controller 3 is directly or indirectly installed on the motor body 1 with the aid of other components, that is, it is fixed relative to the motor body 1, and can be located on the rear side or radial side of the motor body 1. When the fan blade 2 rotates, it disturbs the airflow, and the airflow can pass sequentially or simultaneously through the vicinity of the controller 3 and the outside of the casing 11 of the motor body 1, thereby cooling the controller 3 and the motor body 1, so that the motor body 1 forms an internal oil-cooled and external air-cooled structure.

[0026] Thus, compared with the prior art, the motor heat dissipation structure of this embodiment features an internal oil-cooled motor body 1, resulting in a smaller overall size and lower noise. Furthermore, the fan blades 2 accelerate the airflow outside the motor body 1, increasing heat exchange efficiency and improving heat dissipation. In addition, this embodiment also uses the fan blades 2 to dissipate heat from the controller 3, further enhancing the overall heat dissipation of the integrated motor.

[0027] Preferably, in this embodiment, both ends of the rotating shaft 14 extend outside the housing 11. One end is the driving end, located at the front to connect with the load and drive its movement; the other end is the non-driving end, located at the rear and not connected to the load. The fan blade 2 is mounted on the non-driving end of the rotating shaft 14, and the controller 3 is also located at the rear of the fan blade 2. This reduces the radial dimensions of the fan blade 2 and the overall product.

[0028] like Figure 3 and Figure 8-10 As shown, the motor heat dissipation structure of this embodiment also includes an air guide shroud, which is disposed on the outer periphery of the fan blade 2 and the controller 3, and forms a radial airflow channel 4 between the fan blade 2 and the controller 3.

[0029] Specifically, the air guide cover includes a rear cover 5 and an electrical control box 6. The rear cover 5 is mounted on the rear side of the housing 11 and at least surrounds the radial outer side of the fan blade 2. The controller 3 is installed inside the electrical control box 6. The electrical control box 6 has multiple protrusions 611, and the rear cover 5 has multiple corresponding protrusions 51. Fasteners can pass through the protrusions 51 and connect to the protrusions 611 to fix the electrical control box 6 and the rear cover 5. The protrusions 51 can be fitted onto the protrusions 611 for positioning. Furthermore, a certain gap is left between the electrical control box 6 and the rear cover 5, for example, formed by the protrusions 611 supporting the rear cover 5 and the electrical control box 6. This gap forms the airflow channel 4. Thus, when the fan blade 2 rotates, the airflow can only enter and exit through the airflow channel 4. When passing near the controller 3, it dissipates heat from the controller 3, and when passing outside the housing 11, it dissipates heat from the housing 11.

[0030] The air guide cover in this embodiment includes a rear cover 5 and an electrical control box 6, which is an assembly comprising multiple components for easy installation. Furthermore, in other embodiments, the air guide cover can also be an integral cover structure, with multiple through holes radially formed on the side wall located between the fan blade 2 and the controller 3 to create an airflow channel 4 for accommodating airflow.

[0031] Preferably, such as Figure 8-10 As shown, in this embodiment, the rear cover 5 has an air inlet 52 of a certain size in the middle of its rear end face; the fan blade 2 is a centrifugal fan blade, which can guide the airflow in its middle to the radially outward side. Figure 5 As shown, the radial outer edge of the rear end cover 113 of the housing 11 is provided with flow holes 1131 for airflow, preferably multiple arc-shaped elongated holes; the outer side wall of the housing 11 is provided with multiple heat-conducting fins 1121 extending along the axial length direction and arranged in a circumferential direction. When the fan blade 2 rotates, the airflow is forced to enter from the airflow channel 4 between the rear cover 5 and the electrical control box 6 to dissipate heat from the controller 3; then through the air inlet 52 on the rear cover 5, it is guided to the radial outer side by the fan blade 2, and then flows through the flow holes 1131 on the rear end cover 113 to the heat-conducting fins 1121 on the outer side wall of the housing 11 to dissipate heat from the motor body 1.

[0032] To improve the heat dissipation effect on the controller 3, the motor heat dissipation structure in this embodiment also includes a heat sink 7. The controller 3 is equipped with power devices 31 such as IGBTs, which can be directly mounted on the heat sink 7 with screws. The heat sink 7 can also be provided with grooves 72 adapted to the power devices 31 for positioning; or, the controller 3 and the heat sink 7 can be in thermal contact, that is, they are in direct contact or indirect contact through thermal grease, etc., to achieve heat conduction. The heat sink 7 is disposed between the fan blade 2 and the controller 3, and multiple heat dissipation fins 71 are formed on the heat sink 7 facing the fan blade 2; when the airflow enters from the airflow channel 4, the controller 3 can be better cooled by the heat sink 7 and its heat dissipation fins 71.

[0033] like Figure 9 As shown, the plurality of heat dissipation fins 71 are arranged in a circumferential direction, preferably in a circumferential array. More preferably, the inner end of each heat dissipation fin 71 in the longitudinal direction points to the center. This arrangement structure does not obstruct airflow and does not affect the airflow from the radial outer side to the center; moreover, it increases the heat dissipation contact area, which is beneficial to the heat dissipation of the controller 3.

[0034] like Figure 9-10 As shown, the electrical control box 6 in this embodiment includes a box body 61 and a cover 62 located on its rear side. An opening 612 is formed on the side of the box body 61 facing the rear cover 5. The heat sink 7 is installed on the box body 61 and covers this opening 612. A sealing ring 63 is provided between the heat sink 7 and the mounting edge of this opening 612 of the box body 61. The controller 3 inside the box body 61 is potted with adhesive, such as silicone or resin, to provide protection and fixation for the controller 3. During installation, the controller 3 can be installed on the heat sink 7 first, and then the heat sink 7, controller 3, and sealing ring 63 can be installed on the box body 61. At this time, adhesive can be potted from the side of the cover 62. The sealing ring 63 prevents the adhesive from flowing out, and then the cover 62 can be installed. The rear cover 5 can be first connected to the box body 61 of the electrical control box 6 to form a component, and then this component can be installed on the rear end cover 113 of the housing 11. In this embodiment, the heat sink 7 can be made of metal materials such as aluminum alloy, and the electrical control box 6 and the rear cover 5 can be made of plastic.

[0035] like Figure 3 and Figure 5-7As shown, in this embodiment, the housing 11 includes a rear end cover 113 for mounting the rear cover 5, a front end cover 111, and an intermediate housing 112. The front end cover 111 and the intermediate housing 112 are sealed together by double sealing rings, and the rear end cover 113 and the intermediate housing 112 are also sealed together by double sealing rings. An oil seal 81, i.e., a skeleton oil seal, is also provided between the middle of the front end cover 111 and the rotating shaft 14. The middle of the rear end cover 113 protrudes rearward to form a receiving cavity 1132, and a mechanical seal 82, i.e., a mechanical seal, is provided between the receiving cavity 1132 and the rotating shaft 14.

[0036] Furthermore, in this embodiment, at least one oil cup 83 is provided on the rear end cover 113. Preferably, there are multiple oil cups 83 arranged circumferentially, with the elastic bladder of the oil cup 83 facing the interior of the motor body 1. The oil cup 83 is pressed and installed on the rear end cover 113 by a pressure cap 84. In this way, the oil cup 83 can adapt to elastic deformation when the pressure inside the motor body 1 changes.

[0037] Furthermore, in this embodiment, inserts 85 are also sealed and installed on the rear cover 113. Specifically, the inserts 85 correspond to three phase currents and are integrally formed on the insulating pressure plate 86, and are spaced apart. The insulating pressure plate 86 may also be provided with blocking protrusions 861 to separate the three inserts 85 on the outside. The rear cover 113 is provided with a mounting groove 1133, and a through hole is formed in the middle of the mounting groove 1133. A sealing sleeve 87 is also provided in the mounting groove 1133. The sealing sleeve 87 includes a pressing edge 871 and an intermediate sleeve body 872. The pressing edge 871 is pressed tightly against the bottom of the mounting groove 1133 by the insulating pressure plate 86 for sealing. The intermediate sleeve body 872 extends into the through hole and wraps around the inserts 85, thus insulating and isolating the inserts 85 from the through hole and the rear cover 113. One end of the insert 85 extends into the housing 11 and is electrically connected to the motor lead via welding or other methods; the other end extends out of the housing 11, where a cable can be welded. Holes can be made in the rear cover 5 and the electrical control box 6 to pass the other end of the cable through the electrical control box 6 and connect it electrically to the controller 3. In addition, the rear cover 113 is also provided with an oil-filled sealing screw 88, which includes a screw and an O-ring, and can be sealed by the O-ring.

[0038] As can be seen from the above, the motor heat dissipation structure and integrated motor provided in this embodiment can dissipate heat from the exterior of the motor body and the controller through the fan blades, thereby improving the overall heat dissipation effect of the motor.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A motor heat dissipation structure, characterized in that, include: The motor body (1) includes a housing (11) and a rotating shaft (14). The housing (11) is sealed with cooling oil, and the rotating shaft (14) extends to the outside of the housing (11). Fan blade (2), the fan blade (2) is disposed outside the housing (11) and is mounted on the rotating shaft (14) as it rotates; The controller (3) is directly or indirectly installed on the motor body (1). When the fan blade (2) rotates, the airflow can dissipate heat to the outside of the controller (3) and the housing (11).

2. The motor heat dissipation structure according to claim 1, characterized in that, The non-driving end of the rotating shaft (14) extends to the outside of the housing (11), and the fan blade (2) is mounted on the non-driving end of the rotating shaft (14) as it rotates; the controller (3) is located on the rear side of the fan blade (2).

3. The motor heat dissipation structure according to claim 2, characterized in that, The motor heat dissipation structure also includes an air guide shroud, which covers the outer periphery of the fan blade (2) and the controller (3), and forms a radial airflow channel (4) between the fan blade (2) and the controller (3).

4. The motor heat dissipation structure according to claim 3, characterized in that, The air guide cover includes a rear cover (5) and an electrical control box (6). The rear cover (5) is mounted on the rear side of the housing (11) and surrounds the radial outer side of the fan blade (2). The controller (3) is installed inside the electrical control box (6). The rear cover (5) is connected to the electrical control box (6), and a certain gap is left between the rear cover (5) and the electrical control box (6) to form the airflow channel (4).

5. The motor heat dissipation structure according to claim 4, characterized in that, An air inlet (52) is provided in the middle of the rear end face of the rear cover (5). The fan blade (2) is a centrifugal fan blade. Multiple axially extending and circumferentially arranged heat-conducting fins (1121) are formed on the outer side wall of the casing (11). The airflow enters from the airflow channel (4) and the air inlet (52), passes through the centrifugal fan blade, and blows towards the heat-conducting fins (1121).

6. The motor heat dissipation structure according to claim 4 or 5, characterized in that, The motor heat dissipation structure also includes a heat sink (7), the controller (3) is installed on the heat sink (7) or in thermal contact with the heat sink (7), the heat sink (7) is disposed between the fan blade (2) and the controller (3); a plurality of heat dissipation fins (71) are also formed on the heat sink (7) facing the fan blade (2).

7. The motor heat dissipation structure according to claim 6, characterized in that, The multiple heat dissipation fins (71) are arranged circumferentially, and each heat dissipation fin (71) points to the center position.

8. The motor heat dissipation structure according to claim 6, characterized in that, The electrical control box (6) includes a box body (61) and a cover (62) located on the rear side. The box body (61) has an opening (612) on the side facing the rear cover (5). The heat sink (7) is installed on the box body (61) and covers the opening (612). A sealing ring (63) is provided between the heat sink (7) and the box body (61). The controller (3) inside the box body (61) is potted with glue.

9. The motor heat dissipation structure according to claim 5, characterized in that, The housing (11) includes a front cover (111), a middle housing (112) and a rear cover (113) that are sealed together. The rear cover (5) is installed on the rear cover (113). The radial outer edge of the rear cover (113) is provided with a flow hole (1131) for airflow. The rear end cover (113) is also provided with an oil cup (83); A insert (85) is also sealed on the rear cover (113). One end of the insert (85) extends into the housing (11) and is electrically connected to the motor lead wire, while the other end extends out of the housing (11). An oil seal (81) is provided between the rotating shaft (14) and the front end cover (111); a mechanical seal (82) is provided between the rotating shaft (14) and the rear end cover (113), and the middle part of the rear end cover (113) protrudes to the rear to form a receiving cavity (1132), and the mechanical seal (82) is placed inside the receiving cavity (1132).

10. An integrated motor, characterized in that, It includes a motor body (1) and a controller (3), and the integrated motor adopts the motor heat dissipation structure as described in any one of claims 1-9.

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