Integrated high-power electric propeller

Abstract

The utility model relates to an integrated high-power electric propeller, and relates to the field of motors, the integrated high-power electric propeller comprises a paddle rod, paddles and a brushless motor, the brushless motor comprises a shell, a main shaft, a controller and a transmission assembly, the shell is cylindrical, the main shaft, the transmission assembly and the controller are all arranged in the shell, one end of the main shaft is fixedly connected with a fan, and a heat dissipation plate is fixedly connected in the shell; the heat dissipation plate is located on the side, away from the fan, of the transmission assembly, the controller is annular and arranged on the side face, away from the transmission assembly, of the heat dissipation plate, a gap is reserved between the inner wall of the shell and the transmission assembly, the shell is provided with air holes communicated with the gap, and the paddle rod is located between the shell and the paddles, is hollow and is provided with a transmission shaft used for transmission from the main shaft to the paddles. And the paddle is rotationally connected with the paddle rod. The controller is designed to be annular and installed in the shell, heat generated by the controller is conducted to the heat dissipation plate, heat dissipation of the motor and the controller is achieved at the same time, and the heat dissipation effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of propellers, and in particular to an integrated high-power electric propeller. Background Art

[0002] The propeller is a common power mechanism for watercraft such as ships and yachts. It uses the continuously rotating propeller blades to push the water flow and facilitate the movement of the ship. In addition, the direction and rotation of the propeller can also be controlled to assist in controlling the movement direction of the ship.

[0003] In the related technology, common thrusters generally include a motor and a propeller connected to the motor output shaft and extended into the water during operation. The propeller blades are installed at the end of the propeller extending into the water and rotate under the drive of the motor. In order to reduce the operating noise and other requirements, current thrusters generally use brushless motors as power sources, but brushless motors must be used with a controller (i.e., a control circuit board). A Chinese patent with reference to publication number CN206766310U discloses a marine electric propulsion device, including a power box, a support tube, a gear box and a propeller connected in sequence from top to bottom, the support tube is connected to a fixed frame in a radially rotatable manner, and is detachably hung on the stern of the ship through the fixed frame; a steering rod is provided at the upper part of the support tube, and a pressurized water straightening rudder plate integrating a pressurized water plate and a straightening rudder plate is provided at the lower part of the support tube, the pressurized water plate is horizontally arranged on the support tube above the propeller, the straightening rudder plate is parallel to the output shaft of the gear box and vertically arranged on the support tube below the pressurized water plate, and an opening is provided in the middle of the straightening rudder plate to accommodate the propeller and the gear box.

[0004] As in the electric thruster mentioned above, the controller is generally installed outside the motor body, occupying a large space, and the life of the controller will be affected by the heat generated by the operation of the motor. The MOS tube of the controller itself will also generate a certain amount of heat, so it is generally necessary to supplement it with a heat dissipation mechanism. The heat dissipation of the current motor body relies on the heat sinks evenly arranged around the outer shell for heat dissipation, and the controller is installed on one side of the outer shell. Even if the airflow is used to disperse the heat, it will inevitably have a certain impact on the heat dissipation effect of the motor itself at this position; and due to the installation of the relevant components of the controller, the shape of the motor shell is relatively irregular, and there are many problems such as difficulty in processing and limited motor installation space. Therefore, a motor structure is urgently needed to improve the above problems. Utility Model Content

[0005] In order to improve the impact of controller installation on motor heat dissipation, installation, etc., the present application provides an integrated high-power electric thruster.

[0006] The present application provides an integrated high-power electric thruster, which adopts the following technical solution:

[0007] An integrated high-power electric propeller comprises a propeller rod, blades and a brushless motor. The brushless motor comprises a shell, a main shaft, a controller and a transmission assembly for driving the main shaft to rotate. The shell is provided with a plurality of heat dissipation grooves along the circumferential direction, and the heat dissipation grooves extend along the length direction of the shell. The shell is cylindrical. The main shaft, the transmission assembly and the controller are all arranged in the shell. A fan is fixedly connected to one end of the main shaft. The fan outer cover is provided with a wind cover connected to the shell. A heat sink is fixedly connected in the shell. The heat sink divides the shell into two parts. The heat sink is located on the side of the transmission assembly away from the fan, and the heat sink is provided with a through hole through which the main shaft passes. The controller is annular and is arranged on the side of the heat sink away from the transmission assembly. A gap is left between the inner wall of the shell and the transmission assembly. The shell is provided with a wind hole connected to the gap. The propeller rod is located between the shell and the blade. The propeller rod is hollow and is provided with a transmission shaft for the main shaft to drive the blade. The blade is rotatably connected to the propeller rod.

[0008] By adopting the above technical solution, after the brushless motor is started, the main shaft drives the blades to rotate through the transmission shaft. The controller of the brushless motor is designed to be installed in the shell in a ring shape, which is conducive to the shape of the shell being more regular and easy to process and install; and the heat generated by the controller is transferred to the heat sink, and the fan rotates with the main shaft to guide the filtered airflow, so that the airflow enters the shell, flows through the gap and is discharged. In the process, the heat generated by the transmission components of the motor itself and the heat of the heat sink are taken out, and the heat of the motor itself and the controller is dissipated at the same time, ensuring the heat dissipation effect.

[0009] Optionally, the MOS tube of the controller is located on a side of the controller close to the heat sink and abuts against the heat sink.

[0010] By adopting the above technical solution, the heat generated by the MOS tube is directly contacted and conducted to the heat sink, and then the heat is efficiently taken out by the airflow passing through the heat sink.

[0011] Optionally, the transmission assembly includes a stator and a rotor, the stator is fixedly connected to the heat sink, the rotor is cylindrical and is sleeved outside the stator, a hollow plate is connected between the main shaft and the rotor, the hollow plate is annular, the inner periphery of the hollow plate is fixed to the main shaft, and the outer periphery is fixed to the rotor, and the air cover is provided with a filter.

[0012] By adopting the above technical solution, when the motor is running, the magnetic field between the stator and the rotor causes the rotor to drive the main shaft to rotate. The setting of the hollow plate allows the airflow guided by the fan to pass through the hollow plate and enter between the stator and the rotor, thereby achieving more efficient heat dissipation. The filter element filters the airflow introduced into the motor by the fan to avoid dust accumulation in the motor.

[0013] Optionally, the filter is in the shape of a column arranged coaxially with the air cover, and the filter is detachably connected to a side of the air cover facing away from the fan.

[0014] By adopting the above technical solution, the columnar filter element can provide a relatively larger filtering area in a limited space, and can ensure the air volume required for motor heat dissipation while ensuring the filtering effect; and the filter element that can be removed from the outside of the air cover is easy to disassemble, clean and replace.

[0015] Optionally, the shell includes a head shell and a tail shell that are coaxially arranged, the heat sink is located between the head shell and the tail shell, and the head shell and the tail shell are connected to the heat sink by bolts.

[0016] By adopting the above technical solution, a separate head shell and tail shell are used and connected by a heat sink, which facilitates the installation of the transmission component and the controller.

[0017] Optionally, the outer coaxial sleeve of the shell is provided with a retaining ring, and the retaining ring is detachably connected just above the air hole.

[0018] By adopting the above technical solution, the baffle ring can guide the airflow blown out from the air hole, thereby allowing the airflow to flow into the heat dissipation grooves of the head shell and the tail shell, further enhancing the heat dissipation effect.

[0019] Optionally, the stator includes a support tube, a winding and a plurality of cores, the support tube is fixedly connected to the heat sink, the main shaft passes through the support tube, the cores are annular and sleeved and fixedly connected to the outside of the support tube, the plurality of cores are arranged along the axial direction of the support tube, and the windings are wound outside the cores.

[0020] By adopting the above technical solution, the stator is supported and fixed by the heat sink, which is not easy to block the airflow in the gap, making the contact area between the airflow and the heat sink larger, optimizing the structure and improving the heat dissipation effect.

[0021] Optionally, the core is made of ferrite material.

[0022] By adopting the above technical solution, the ferrite has higher magnetic permeability and lower loss.

[0023] Optionally, the propeller rod is fixedly connected to a steering rod, and the steering rod is located at one end of the propeller rod close to the brushless motor.

[0024] By adopting the above technical solution, it is convenient for the user to control the direction of the paddle rod by holding the steering rod, so as to facilitate adjustment.

[0025] Optionally, the paddle rod is detachably connected to a rotating bracket, and the rotating bracket is located below the steering rod.

[0026] By adopting the above technical solution, it is convenient for users to fix the oar rod on the edge of the ship using the rotating bracket, thereby increasing the convenience of use.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. After the brushless motor is started, the main shaft drives the blades to rotate through the transmission shaft. The controller of the brushless motor is designed to be installed in the shell in a ring shape, which is conducive to the shape of the shell being more regular and easy to process and install; and the heat generated by the controller is transferred to the heat sink, and at the same time, the fan rotates with the main shaft to guide the filtered airflow, so that the airflow enters the shell, flows through the gap and is discharged. In the process, the heat generated by the transmission components of the motor itself and the heat of the heat sink are taken out, and the heat of the motor itself and the controller is dissipated at the same time, ensuring the heat dissipation effect;

[0029] 2. The heat generated by the MOS tube is directly transferred to the heat sink, and then the heat is efficiently taken out by the airflow passing through the heat sink;

[0030] 3. When the motor is running, the magnetic field between the stator and the rotor causes the rotor to drive the main shaft to rotate. The setting of the hollow plate allows the airflow guided by the fan to pass through the hollow plate and enter between the stator and the rotor, thereby achieving more efficient heat dissipation. The filter element filters the airflow introduced into the motor by the fan to avoid dust accumulation in the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the propeller of this application.

[0032] Figure 2 It is a schematic diagram of the overall structure of the brushless motor of the present application.

[0033] Figure 3 It is a schematic diagram of the explosion structure of an embodiment of the present application.

[0034] Figure 4 It is a schematic diagram of the relative position of the stator and the heat sink.

[0035] Figure 5 It is a schematic diagram of the stator structure.

[0036] Figure 6 is a schematic diagram highlighting the location of the filter element.

[0037] Figure 7 is a schematic diagram highlighting the position of the retaining ring.

[0038] Explanation of the reference numerals: 1. outer shell; 11. head shell; 12. tail shell; 121. air hole; 13. heat sink; 14. heat sink; 15. baffle ring; 16. filter element; 2. main shaft; 3. transmission assembly; 31. stator; 311. support tube; 312. core body; 313. winding; 32. rotor; 4. controller; 41. MOS tube; 5. fan; 6. wind cover; 7. hollow plate; 8. paddle rod; 81. steering rod; 82. rotating bracket; 9. paddle blade. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0040] The embodiment of the present application discloses an integrated high-power electric thruster.

[0041] Reference Figure 1 An integrated high-power electric propeller includes a propeller rod 8, a propeller blade 9 and a brushless motor. After the brushless motor is started, the main shaft 2 drives the propeller blade 9 to rotate via the transmission shaft, and the propeller blade 9 can stir the water flow to achieve propulsion.

[0042] Reference Figure 2 and Figure 3 The brushless motor includes a housing 1, a controller 4, a main shaft 2 and a transmission assembly 3 of the main shaft 2. The controller 4 is installed in the housing 1, and a fan 5 is installed at one end of the main shaft 2 located at the tail of the motor. The rotation of the main shaft 2 drives the fan 5 to rotate, guides the airflow into the housing 1, and efficiently dissipates the heat of the transmission assembly 3 and the controller 4.

[0043] Reference Figure 1 The paddle rod 8 is cylindrical, and one end of the paddle rod 8 is detachably connected to the housing 1 of the brushless motor. Specifically, in this embodiment, bolts are used to connect the housing 1 and the paddle rod 8, which is convenient for assembly, maintenance, etc. A transmission shaft is coaxially connected to the paddle rod 8. The end of the transmission shaft close to the brushless motor can be connected to the main shaft 2 by a coupling or the like, and the other end of the transmission shaft is connected to the blade 9. During operation, the end of the paddle rod 8 on which the blade 9 is installed extends below the water surface, and then the brushless motor is started, and the main shaft 2 rotates and drives the blade 9 to rotate through the transmission shaft to achieve propulsion.

[0044] Reference Figure 1 , a steering rod 81 and a rotating bracket 82 can be optionally installed on the oar rod 8. The steering rod 81 and the rotating bracket 82 can both adopt the same structure corresponding to the current common propeller, and this embodiment will not be elaborated in detail. The rotating bracket 82 is fixed to the oar rod 8 using a clamp or similar structure. The user can use the rotating bracket 82 to fix the oar rod 8 on the edge of the ship to stabilize its position. In addition, the steering rod 81 is installed above the rotating bracket 82, and the user can also hold the steering rod 81 to adjust the direction of the oar rod.

[0045] Reference Figure 2 and Figure 3In this embodiment, the housing 1 is cylindrical for illustration. The housing 1 includes a head housing 11 and a tail housing 12. The two parts are coaxially arranged and arranged along the length direction of the entire housing 1. A heat sink 14 is installed between the head housing 11 and the tail housing 12. The heat sink 14 is annular. The outer diameter of the heat sink 14 is equivalent to the diameter of the housing 1. A plurality of bolt holes are opened at the outer edge. The head housing 11 and the tail housing 12 are fixedly connected to the heat sink 14 by bolts passing through the bolt holes. The heat sink 14 is used to separate the space inside the head housing 11 from the space inside the tail housing 12.

[0046] Reference Figure 3 and Figure 4 A through hole is provided at the center of the heat sink 14, and the main shaft 2 passes through the through hole and is coaxially installed in the housing 1. The transmission assembly 3 includes a stator 31 and a rotor 32. The stator 31 includes a support tube 311, a winding 313 and a plurality of cores 312. The aperture of the through hole is adapted to the outer diameter of the support tube 311. The support tube 311 passes through the through hole and is connected to the heat sink 14, and is relatively fixed by welding, gluing, etc., so that the heat sink 14 supports the main shaft 2. The main shaft 2 is inserted into the support tube 311, and a bearing is installed between the support tube 311 and the main shaft 2, and the support tube 311 is used to support the main shaft 2.

[0047] Reference Figure 3 and Figure 5 , a plurality of core bodies 312 are installed on the part of the support tube 311 located inside the tail housing 12. The core body 312 is annular and its outer periphery is a "T-shaped" structure that is the same as the conventional stator 31 in the art. This embodiment will not be described in detail. In this embodiment, the number of core bodies 312 is three for illustration, but the actual number is not limited and can be selected according to factors such as the required length of the stator 31. The core body 312 is arranged along the axial direction of the support tube 311 and is sleeved outside the support tube 311, and is also relatively fixed to the support tube 311 by gluing, welding, etc.

[0048] Reference Figure 5 In the present embodiment, a clamping structure such as a groove and a protrusion is selectively provided between the inner wall of the core body 312 and the outer wall of the support tube 311, which plays the role of fixing the relative position of the core body 312 and the support tube 311, and at the same time can fix the relative position between different core bodies 312, so as to achieve the effects of facilitating installation and extending service life.

[0049] Reference Figure 4 The winding 313 is wound on the core 312 in the same manner as the conventional stator 31, which will not be described in detail in this embodiment. In this embodiment, the core 312 is made of ferrite, which has higher magnetic permeability and lower loss. In other embodiments, non-steel soft magnetic materials such as sendust and nanomagnetic can also be used.

[0050] Reference Figure 3The rotor 32 is in the shape of a tube that is sleeved outside the stator 31 as a whole. The end of the rotor 32 away from the heat sink 14 is fixedly connected to a hollow plate 7. The hollow plate 7 is in the shape of a ring that is coaxially arranged with the main shaft 2, and the inner circumference is fixedly connected to the main shaft 2. The rotor 32 rotates under the magnetic force between the stator 31, thereby driving the main shaft 2 to rotate. The hollow plate 7 is located between the transmission assembly 3 and the fan 5, and the airflow introduced into the housing 1 by the fan 5 can pass through the hollow plate 7 and directly contact the transmission assembly 3.

[0051] Reference Figure 3 Since the hollow plate 7 is used to allow the airflow to directly enter between the stator 31 and the rotor 32, impurities such as dust in the airflow are likely to affect the service life of the transmission assembly 3. For slightly larger impurities, the wind shield 6 installed outside the fan 5 is used to block them in this embodiment. The wind shield 6 is bowl-shaped and fixed to the tail housing 12 at the edge of the circumference, thereby completely covering the fan 5 inside, thereby playing a protective effect on the fan 5.

[0052] Reference Figure 6 For small particles of dust, etc., this embodiment also selectively installs a filter 8 to pre-filter the air entering the housing 1. And in this embodiment, a columnar filter 8 is preferably installed on the outside of the wind hood 6. The cylindrical filter 8 can ensure sufficient filtering area while ensuring the air intake within the limited area of ​​the wind hood 6. The filter 8 is installed outside the wind hood 6, and the filter 8 can be disassembled, cleaned or replaced without disassembling the housing 1, and even does not affect the operation of the motor itself in a short time.

[0053] Reference Figure 3 and Figure 6 Since the rotor 32 rotates at a high speed during operation, a gap is left between the rotor 32 and the inner wall of the housing 1. The airflow introduced into the housing 1 by the fan 5 not only enters between the stator 31 and the rotor 32, but also enters the gap at the same time. In addition, a plurality of heat dissipation grooves 13 are provided on the outer peripheral surface of the housing 1. The heat dissipation grooves 13 extend along the busbar direction of the housing 1. The ends of the heat dissipation grooves 13 close to the wind cover 6 are connected to the housing 1, so that the airflow at the fan 5 also flows from the outside of the housing 1 along the heat dissipation grooves 13 at the same time, thereby comprehensively reducing the heat accumulation inside and outside the motor.

[0054] Reference Figure 6 The airflow flowing from the outer shell 1 will directly contact the heat sink 14. The tail shell 12 is provided with an air hole 121 in the direction close to the heat sink 14. The airflow is discharged out of the motor from the air hole 121 along the surface of the heat sink 14. In this embodiment, the bolts at the connection between the tail shell 12 and the heat sink 14 are used to separate a gap between the tail shell 12 and the heat sink 14. The gap serves as the air hole 121, which reduces the processing difficulty of the tail shell 12.

[0055] Reference Figure 3, the process of airflow will take away the heat of the heat sink 14. In this embodiment, the controller 4 is annularly sleeved outside the portion of the support tube 311 extending into the head shell 11, and its MOS tube 41 is located on the side close to the heat sink 14 and fits with the heat sink 14, so that the heat generated by the MOS tube 41 is quickly transferred to the heat sink 14, and then the heat is dissipated outside the motor along with the airflow passing through the heat sink 14. Among them, the material of the heat sink 14 is preferably aluminum metal with relatively strong thermal conductivity, and aluminum or aluminum alloy can be used; other types of materials with strong thermal conductivity can also be selected in other embodiments.

[0056] Reference Figure 3 and Figure 6 Since the controller 4 is installed in the head shell 11 and is separated by a heat sink 14 in the middle, the airflow will not directly contact the controller 4, avoiding the influence of static electricity, dust, etc. on the total electronic components of the controller 4, thereby ensuring the normal operation of the controller 4 and having sufficient heat dissipation capacity.

[0057] Reference Figure 6 and Figure 7 A baffle ring 15 is selectively provided on the outside of the housing 1. The baffle ring 15 is sleeved on the outside of the housing 1. When the motor is in normal operation, the baffle ring 15 is directly above the air hole 121. The airflow blown out of the air hole 121 is deflected by the baffle ring 15, and then flows through the surface of the housing 1 along the heat dissipation groove 13 to dissipate the heat generated in various parts of the motor.

[0058] The implementation principle of an integrated high-power electric propeller in the embodiment of the present application is as follows: after the brushless motor is started, the main shaft 2 drives the blades 9 to rotate through the transmission shaft. The brushless motor designs the controller 4 to be installed in the housing 1 in a ring shape, which is conducive to a more regular shape of the housing 1 and is easy to process and install; and the heat generated by the controller 4 is conducted to the heat sink 14, while the fan 5 rotates with the main shaft 2 to guide the filtered airflow, so that the airflow enters the housing 1, flows through the gap and then is discharged, and in the process, the heat generated by the transmission component 3 of the motor itself and the heat of the heat sink 14 are taken out, and the heat of the motor itself and the controller 4 is dissipated at the same time, ensuring the heat dissipation effect.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An integrated high-power electric propeller, comprising a propeller rod (8), a propeller blade (9) and a brushless motor, wherein the brushless motor comprises a housing (1), a main shaft (2), a controller (4) and a transmission assembly (3) for driving the main shaft (2) to rotate, wherein the housing (1) is provided with a plurality of heat dissipation grooves (13) along the circumference, and the heat dissipation grooves (13) extend along the length direction of the housing (1), and wherein: The housing (1) is cylindrical, the main shaft (2), the transmission assembly (3) and the controller (4) are all arranged in the housing (1), one end of the main shaft (2) is fixedly connected to a fan (5), the outer cover of the fan (5) is provided with a wind shield (6) connected to the housing (1), a heat sink (14) is fixedly connected in the housing (1), the heat sink (14) divides the housing (1) into two parts, the heat sink (14) is located on the side of the transmission assembly (3) away from the fan (5), and the heat sink (14) ) is provided with a through hole through which the main shaft (2) passes; the controller (4) is annular and is arranged on the side of the heat sink (14) away from the transmission assembly (3); a gap is left between the inner wall of the housing (1) and the transmission assembly (3); the housing (1) is provided with a wind hole (121) connected to the gap; the propeller rod (8) is located between the housing (1) and the propeller blade (9); the propeller rod (8) is hollow and is provided with a transmission shaft for transmitting the main shaft (2) to the propeller blade (9); the propeller blade (9) is rotatably connected to the propeller rod (8).

2. The integrated high-power electric propeller according to claim 1, characterized in that: The MOS tube (41) of the controller (4) is located on a side of the controller (4) close to the heat sink (14) and abuts against the heat sink (14).

3. The integrated high-power electric propeller according to claim 1, characterized in that: The transmission assembly (3) comprises a stator (31) and a rotor (32), wherein the stator (31) is fixedly connected to a heat sink (14), the rotor (32) is cylindrical and sleeved outside the stator (31), a hollow plate (7) is connected between the main shaft (2) and the rotor (32), the hollow plate (7) is annular, the inner periphery of the hollow plate (7) is fixed to the main shaft (2), and the outer periphery is fixed to the rotor (32), and the air cover (6) is provided with a filter element (16).

4. The integrated high-power electric propeller according to claim 3, characterized in that: The filter element (16) is in the shape of a column and is coaxially arranged with the wind cover (6). The filter element (16) is detachably connected to a side of the wind cover (6) facing away from the fan (5).

5. The integrated high-power electric propeller according to claim 1, characterized in that: The housing (1) comprises a head housing (11) and a tail housing (12) which are coaxially arranged, a heat sink (14) is located between the head housing (11) and the tail housing (12), and the head housing (11) and the tail housing (12) are both connected to the heat sink (14) by means of bolts.

6. The integrated high-power electric propeller according to claim 1, characterized in that: The outer coaxial sleeve of the housing (1) is provided with a retaining ring (15), and the retaining ring (15) is detachably connected to the top of the air hole (121).

7. The integrated high-power electric propeller according to claim 3, characterized in that: The stator (31) comprises a support tube (311), a winding (313) and a plurality of core bodies (312); the support tube (311) is fixedly connected to the heat sink (14); the main shaft (2) passes through the support tube (311); the core bodies (312) are annular and sleeved and fixedly connected to the outside of the support tube (311); the plurality of core bodies (312) are arranged along the axial direction of the support tube (311); and the winding (313) is wound around the outside of the core bodies (312).

8. The integrated high-power electric propeller according to claim 7, characterized in that: The core (312) is made of ferrite material.

9. The integrated high-power electric propeller according to claim 1, characterized in that: The paddle rod (8) is fixedly connected to a steering rod (81), and the steering rod (81) is located at one end of the paddle rod (8) close to the brushless motor.

10. The integrated high-power electric propeller according to claim 9, characterized in that: The paddle rod (8) is detachably connected to a rotating bracket (82), and the rotating bracket (82) is located below the steering rod (81).

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