External rotor motor with control
By integrating the radiator and control board into the outer rotor motor and utilizing the rotation of the rotor housing to drive air circulation, the problems of space waste and poor ventilation in the outer rotor motor are solved, achieving efficient heat dissipation and convenient installation.
Patent Information
- Application Number
- CN202422889601.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-26
AI Technical Summary
When installing a circuit board and a heat sink in an existing external rotor motor, space is wasted and ventilation is poor, which easily leads to temperature accumulation and shortens the service life of the circuit board.
The radiator and control board are integrated inside the rotor housing. The rotation of the rotor housing drives air circulation, and heat is dissipated through the heat conducting plate and fins, avoiding single-point connection and increasing connection stability.
It saves space, improves heat dissipation, extends the service life of the circuit board, and is easy to install and use.
Smart Images
Figure CN223428299U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a motor, in particular to a controlled outer rotor motor. Background Art
[0002] Motors are generally divided into outer rotor motors and inner rotor motors according to the relative positions of the rotor and stator. The outer housing of an outer rotor motor is in a rotating state, that is, the portion of the housing where the permanent magnets are fixed rotates, while the stator assembly remains fixed in the center of the housing and remains stationary. Therefore, compared with inner rotor motors, outer rotor motors have the characteristics of high efficiency, high torque output, space saving, and compact design. However, since the control of the motor generally requires the additional installation of a circuit board and a heat sink for dissipating heat from the circuit board, when installing the motor, although the outer rotor motor structure is used to save space, the installation of the circuit board and the heat sink still causes space waste. As a result, even products made with outer rotor motors still have bloated size or are inconvenient to install. In addition, the additionally installed circuit board and heat sink are prone to poor ventilation due to problems with the installation environment, which can easily lead to temperature accumulation and temperature rise, and in severe cases, damage to the electronic components on the circuit board can easily occur. Utility Model Content
[0003] The utility model mainly solves the technical problems existing in the prior art, thereby providing a controlled outer rotor motor that effectively saves space, improves space utilization, improves the heat dissipation effect of the circuit board, ensures service life, and is easy to assemble and use.
[0004] The utility model is a controlled outer rotor motor, comprising a rotor housing, end covers and a tail cover connected at both ends of the rotor housing, a permanent magnet connected to the inner surface of the rotor housing, and a stator assembly movably connected to the center of the rotor housing, a core shaft penetrating the end covers and the tail cover is provided in the center of the stator assembly, and a control board and a radiator connected to the core shaft are provided on the side of the stator assembly close to the tail cover, the radiator comprises a heat conducting plate, fins connected to the side of the heat conducting plate for heat dissipation, and a clip connected below the heat conducting plate for fixing the control board, and an axial hole for the core shaft to pass through is provided in the center of the heat conducting plate, the end covers and the tail cover are both provided with an inner cylinder and an outer cylinder, and a fan blade is connected between the inner cylinder and the outer cylinder, the outer cylinder and the rotor housing are connected to each other, and the inner cylinder and the core shaft are movably connected.
[0005] Preferably, the core shaft is provided with a core hole at one end of the control panel, and a wire hole is provided between the central control panel and the tail cover of the core shaft. One side of the core hole passes through the core shaft, and the other side of the core hole is connected to the wire hole, so that the energized wires in the stator assembly and the connecting wires of the control panel can pass through the core hole and pass through the tail cover, and the wires can enter the rotor housing through the wire hole and be connected to the control panel or the stator assembly.
[0006] Preferably, the core shaft passes through the shaft hole and is cooperatively connected with the heat conducting plate, and a spacer is provided inside the shaft hole. The spacer is located between the core shaft and the heat conducting plate, so that the core shaft and the heat conducting plate in the radiator can be insulated and protected by the spacer to prevent the heat generated by the operation of the stator assembly from being transferred to the radiator through the core shaft, thereby ensuring the effect of cooling the control board through the radiator. At the same time, the spacer can increase the stability and firmness of the connection between the radiator and the core shaft, and avoid the problem of movement caused by the single-point connection of the radiator in the core shaft.
[0007] Preferably, a limiting groove and a positioning hole are provided on the side of the shaft hole, the positioning hole passes through the heat conducting plate and is connected to the shaft hole, and the outer surface of the core shaft is provided with a locking hole that cooperates with the positioning hole to fix the radiator, and the outer surface of the spacer is connected with a convex strip that is engaged with the limiting groove. The cooperation between the convex strip and the limiting groove allows the spacer to be limitedly installed inside the shaft hole, and is connected to the core shaft through a pin or a screw passing through the positioning hole, so that the radiator can be connected and fixed on the core shaft.
[0008] Preferably, a concave cavity is provided in the center of the inner cylinder, and a through hole is provided in the center of the concave cavity that penetrates the inner cylinder. The outer surface of the outer cylinder is connected with a connecting hole, so that the bearing for the movably connected center of the core shaft can be embedded and installed in the concave cavity in the center of the inner cylinder, so that the core shaft can be movably supported by the inner cylinder, and the core shaft can be movably connected to the center of the rotor shell, while the two ends of the core shaft can pass through the through hole, and the screws pass through the connecting hole to fit the outer cylinder and the rotor shell.
[0009] Preferably, the end cover is arranged on the side away from the radiator, and the tail cover is arranged on the side close to the radiator. The concave cavity of the end cover and the concave cavity of the tail cover are arranged opposite to each other, and a belt pattern is provided on the side of the end cover away from the concave cavity, so that the rotation of the rotor shell can synchronously drive the end cover and the tail cover to rotate, and then drive the outside air into the rotor shell through the fan blades between the inner cylinder and the outer cylinder for air circulation. The relative arrangement of the concave cavity makes it easier for the bearing with a movable connection in the center of the core shaft to be installed inside the rotor shell, and the belt pattern on the side of the end cover makes it easier for the rotation of the rotor shell to drive other transmission mechanisms to rotate through the end cover.
[0010] As preferred, the heat sink is located between the control panel and the tail cover, and the control panel is connected with electronic components, the electronic components are fixed with the clamping piece, the outer surface of the heat sink is connected with two or more fins, the gap between the inner surface of the rotor shell and the control panel is more than two millimeters, the electronic components can be bridge stacks or other heating elements, the heat generated by the electronic components on the control panel can be transmitted to the heat conduction plate through the clamping piece, so that the heat conduction plate and the connected fins can dissipate heat, and the air driven by the rotation of the tail cover is used to dissipate heat from the heat sink, and the gap between the control panel and the rotor shell not only avoids the rotor shell rotating and possibly touching the control panel or the electronic components, but also improves the air entering the stator assembly for cooling circulation driven by the rotation of the rotor shell, and the gap between the inner surface of the rotor shell and the heat sink is more than two millimeters, which avoids the possibility of the inner surface of the rotor shell touching the heat sink.
[0011] The utility model discloses the beneficial effect is: because the stator assembly is close to the tail cover's one side is provided with the control panel and the heat sink that cooperates and connects with the mandrel, and the both ends of rotor shell are connected with end cover and tail cover respectively, make the heat sink and control panel can be integrated in the inside of rotor shell, guaranteeed that the outer rotor motor design structure compact, space saving's characteristics, avoided the additional radiator's space structure that is used for controlling the circuit control panel and cooling of outer rotor motor, effectively saved the space, improved space utilization, convenient subsequent outer rotor motor's installation effect and use convenience, and because the end cover and tail cover of rotor shell both ends are all provided with the fan page in the center, and the heat sink and control panel are connected and installed on the mandrel in the center of rotor shell, and the electronic component of control panel is fixed on the heat conduction plate of heat sink through the clamping piece, so that the heat generated by the electronic component in the control panel can be conducted to the heat sink through the clamping piece and the heat conduction plate, and the circulation of external air is driven by the fan page of end cover and tail cover in the process of rotor shell rotation, so that the external air in the rotor shell can take away the corresponding temperature, so that the external air can be cooled quickly through the heat sink when entering the stator assembly, improve the cooling effect of the heat sink on the control panel, avoid the temperature accumulation caused by the poor air circulation of the circuit control panel due to the installation structure environment problem, and guarantee the service life of the control panel. ACCURACY
[0012] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for those skilled in the art, under the premise of not creating laboriously, can also obtain other drawings according to these drawings.
[0013] Figure 1This is a schematic diagram of the overall structure of a controlled outer rotor motor of the present invention;
[0014] Figure 2 This is an exploded view of the overall structure of a controlled outer rotor motor of the present invention;
[0015] Figure 3 This is a cross-sectional view of the overall structure of an outer rotor motor with control according to the present invention;
[0016] Figure 4 This is a schematic structural diagram of an end cover or tail cover of an outer rotor motor with control in the present invention;
[0017] Figure 5 This is a schematic diagram of the connection structure of the radiator, control board and stator assembly in a controlled outer rotor motor of the utility model;
[0018] Figure 6 The utility model is a schematic diagram of the connection structure of the radiator and the control board in a controlled outer rotor motor. DETAILED DESCRIPTION
[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.
[0020] like Figures 1 to 6 The outer rotor motor with control shown in the figure includes a rotor housing 1, an end cover 11 and a tail cover 12 connected to both ends of the rotor housing 1, a permanent magnet (not marked) connected to the inner surface of the rotor housing 1, and a stator assembly 2 movably connected to the center of the rotor housing 1. The center of the stator assembly 2 is provided with a core shaft 21 passing through the end cover 11 and the tail cover 12, and the side of the stator assembly 2 close to the tail cover 12 is provided with a control board 3 and a radiator 4 connected to the core shaft. The radiator 4 includes a heat conducting plate 43, and fins 41 connected to the side of the heat conducting plate 43 for heat dissipation, and a clip 42 connected to the bottom of the heat conducting plate 43 for fixing the control board 3, and an axial hole 44 for the core shaft 21 to pass through is provided in the center of the heat conducting plate 43, the end cover 11 and the tail cover 12 are both provided with an inner cylinder 123 and an outer cylinder 121, and a fan leaf 122 is connected between the inner cylinder 123 and the outer cylinder 121, the outer cylinder 121 and the rotor housing 1 are connected to each other, and the inner cylinder 123 and the core shaft 21 are movably connected.
[0021] The core shaft 21 is located at one end of the control board 3 and is provided with a core hole 211, and a wire hole 212 is provided between the control board 3 and the tail cover 12 in the center of the core shaft 21. One side of the core hole 211 passes through the core shaft 21, and the other side of the core hole 211 is connected to the wire hole 212, so that the energized wires in the stator assembly 2 and the connecting wires of the control board 3 can pass through the core hole 211 and pass through the tail cover 12, and allow the wires to enter the rotor housing 1 through the wire hole 212 and be connected to the control board 3 or the stator assembly 2.
[0022] The core shaft 21 passes through the shaft hole 44 and is connected with the heat conducting plate 43, and a spacer 5 is provided inside the shaft hole 44. The spacer 5 is located between the core shaft 21 and the heat conducting plate 43, so that the core shaft 21 and the heat conducting plate 43 in the radiator 4 can be insulated and protected by the spacer 5 to prevent the heat generated by the stator assembly 2 from being transferred to the radiator 4 through the core shaft 21, thereby ensuring the effect of cooling the control board 3 through the radiator 4. At the same time, the spacer 5 can increase the connection stability and firmness between the radiator 4 and the core shaft 21, and avoid the problem of movement caused by the single point connection of the radiator 4 in the core shaft 21.
[0023] A limiting groove 441 and a positioning hole 442 are provided on the side of the shaft hole 44. The positioning hole 442 passes through the heat conducting plate 43 and is connected to the shaft hole 44. The outer surface of the core shaft 21 is provided with a locking hole 213 that cooperates with the positioning hole 442 to fix the radiator 4. The outer surface of the spacer 5 is connected with a convex strip (not marked) that is engaged with the limiting groove 441. The cooperation between the convex strip and the limiting groove 441 allows the spacer 5 to be limitedly installed inside the shaft hole 44, and is connected to the core shaft 21 through a pin or a screw passing through the positioning hole 442, so that the radiator 4 is connected and fixed on the core shaft 21.
[0024] A concave cavity 124 is provided in the center of the inner cylinder 123, and a through hole 125 is provided in the center of the concave cavity 124 to penetrate the inner cylinder 123. The outer surface of the outer cylinder 121 is connected with a connecting hole 126, so that the bearing for the central movably connected core shaft 21 can be embedded and installed in the concave cavity 124 in the center of the inner cylinder 123, so that the core shaft 21 can be movably supported by the inner cylinder 123, which facilitates the movably connected core shaft 21 in the center of the rotor housing 1, and both ends of the core shaft 21 can pass through the through hole 125. At the same time, screws pass through the connecting hole 126 to cooperate and connect the outer cylinder 121 and the rotor housing 1.
[0025] The end cover 11 is arranged on the side away from the radiator 4, and the tail cover 12 is arranged on the side close to the radiator 4. The concave cavity 124 of the end cover 11 is arranged opposite to the concave cavity 124 of the tail cover 12. A belt pattern (not marked) is provided on the side of the end cover 11 away from the concave cavity 124, so that the rotation of the rotor housing 1 can synchronously drive the end cover 11 and the tail cover 12 to rotate, and then drive the outside air into the rotor housing 1 through the fan blades 122 between the inner cylinder 123 and the outer cylinder 121 for air circulation. The relative arrangement of the concave cavity 124 makes it easier for the central movable bearing of the core shaft 21 to be installed inside the rotor housing 1, and the belt pattern on the side of the end cover 11 makes it easier for the rotation of the rotor housing 1 to drive other transmission mechanisms to rotate through the end cover 11.
[0026] The radiator 4 is located between the control board 3 and the tail cover 12, and an electronic component 31 is connected to the control board 3. The electronic component 31 and the clip 42 are fitted and fixed to each other. The outer surface of the radiator 4 is distributed and connected with two or more fins 41. A gap of more than two millimeters is set between the inner surface of the rotor housing 1 and the control board 3. The electronic component 31 can be a bridge pile or other heating element, so that the electronic component 31 that may generate heat on the control board 3 can be transferred to the heat conducting plate 43 through the clip 42, so that the heat conducting plate 43 and its connected fins 41 can dissipate heat, and the air driven by the rotation of the tail cover 12 is used to dissipate heat for the radiator 4. The gap between the control board 3 and the rotor housing 1 not only prevents the rotor housing 1 from rotating and possibly touching the control board 3 or the electronic component 31, but also increases the air driven by the rotation of the rotor housing 1 to enter the stator assembly 2 for cooling and circulation. There is also a gap of more than two millimeters between the inner surface of the rotor housing 1 and the radiator 4 to avoid the possibility of the inner surface of the rotor housing 1 touching the radiator 4.
[0027] The core shaft 21 in the center of the stator assembly of the controlled outer rotor motor is movably connected to the inside of the rotor housing 1 through the end cover 11 and the tail cover 12, so that the two ends of the core shaft 21 are movably connected with bearings installed in the concave cavity 124 in the center of the inner cylinder 123. The control board 3 and the radiator 4 are connected by screws passing through the electronic components 31 and the clip 42. The shaft hole 44 in the center of the radiator 4 is installed in the shaft hole 44 by the cooperation of the convex strip and the limiting groove 441, so that the core shaft 21 passes through the shaft hole 44 of the control board 3 and the radiator 4, and the core shaft 21 and the radiator 4 are isolated from each other by the spacer 5. Then, a screw or pin is passed through the positioning hole 442 through the spacer 5 and connected to the lock hole 213 of the core shaft 21, so that the heat sink 4 is fixedly installed in the center of the core shaft 21, and the two ends of the core shaft 21 pass through the end cover 11 and the tail cover 12 through the through hole 125. At the same time, the end cover 11 and the tail cover 12 are screwed to the rotor housing 1 through the connecting hole 126 on the outside of the outer cylinder 121; and the power wires or control wires of the control board 3 and the stator assembly 2 pass through the core hole 211 and the wire hole 212 through the tail cover 12 and enter the rotor housing 1 to supply power and control signals to the stator assembly 2 or the control board 3. The electronic component 31 and the clip 42 used to connect the control board 3 and the heat sink 4 can be fixed by screws, welding or glue; the heat sink 4 and the core shaft 21 can be connected by a screw through the positioning hole 442 and the lock hole 213 for threaded connection, or a pin / pin can be inserted through the positioning hole and the lock hole for interference fit.
[0028] The beneficial effects of the present invention are as follows: since a control board and a radiator that are connected to the core shaft are provided on one side of the stator assembly close to the tail cover, and the two ends of the rotor shell are respectively connected to the end cover and the tail cover, the radiator and the control board can be integrated into the interior of the rotor shell, thereby ensuring the compact design structure and space saving characteristics of the outer rotor motor, avoiding the spatial structure of the additional installation of a circuit control board for controlling the outer rotor motor and the additional radiator required for cooling, effectively saving space, improving space utilization, and facilitating the subsequent installation effect and use convenience of the outer rotor motor; and since fan blades are provided in the center of the end covers and the tail cover at both ends of the rotor shell, and the radiator and the control board are connected and installed on the rotor On the core shaft in the center of the sub-housing, the electronic components of the control board are fixed on the heat conducting plate of the radiator through clips, so that the heat generated by the electronic components in the control board can be conducted to the radiator through the clips and the heat conducting plate, and the fan blades of the tail cover and the end cover drive the circulation of the outside air during the rotation of the rotor housing, so that the outside air passes through the inside of the rotor housing to take away the corresponding temperature, so that when the outside air enters to cool the stator assembly, it can first be quickly cooled through the radiator, thereby improving the cooling effect of the radiator on the control board, avoiding the temperature accumulation caused by poor air circulation of the circuit control board due to environmental problems of the installation structure, and ensuring the service life of the control board.
[0029] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that do not require creative effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.
Claims
1. A controlled outer rotor motor comprising a rotor housing, end caps and tail caps connected to both ends of the rotor housing, a permanent magnet connected to the inner surface of the rotor housing, and a stator assembly movably connected to the center of the rotor housing, characterized in that: A core shaft passing through the end cover and the tail cover is provided in the center of the stator assembly, and a control board and a radiator connected to the core shaft are provided on the side of the stator assembly close to the tail cover. The radiator includes a heat conducting plate, and fins connected to the side of the heat conducting plate for heat dissipation, and a clip connected to the bottom of the heat conducting plate for fixing the control board, and an axial hole for the core shaft to pass through is provided in the center of the heat conducting plate. The end cover and the tail cover are both provided with an inner cylinder and an outer cylinder, and a fan blade is connected between the inner cylinder and the outer cylinder. The outer cylinder and the rotor housing are connected to each other, and the inner cylinder and the core shaft are movably connected.
2. The controlled outer rotor motor according to claim 1, characterized in that: The core shaft is provided with a core hole at one end of the control board, and a wire hole is provided between the central control board and the tail cover of the core shaft. One side of the core hole passes through the core shaft, and the other side of the core hole is connected to the wire hole.
3. The controlled outer rotor motor according to claim 2, characterized in that: The core shaft passes through the shaft hole and is matched with the heat conducting plate. A spacer is provided inside the shaft hole and is located between the core shaft and the heat conducting plate.
4. The controlled outer rotor motor according to claim 3, characterized in that: A limiting groove and a positioning hole are provided on the side of the shaft hole. The positioning hole passes through the heat conducting plate and is connected to the shaft hole. The outer surface of the core shaft is provided with a locking hole that cooperates with the positioning hole to fix the radiator. The outer surface of the spacer is connected with a convex strip that is engaged with the limiting groove.
5. The controlled outer rotor motor according to claim 1, characterized in that: A concave cavity is provided at the center of the inner cylinder, a through hole penetrating the inner cylinder is provided at the center of the concave cavity, and a connecting hole is connected to the outer surface of the outer cylinder.
6. The controlled outer rotor motor according to claim 5, characterized in that: The end cover is arranged on a side away from the radiator, the tail cover is arranged on a side close to the radiator, the concave cavity of the end cover is arranged opposite to the concave cavity of the tail cover, and the side of the end cover away from the concave cavity is provided with a belt pattern.
7. The controlled outer rotor motor according to any one of claims 1 to 6, characterized in that: The radiator is located between the control board and the tail cover, and the control board is connected to electronic components. The electronic components and the clips are fitted and fixed to each other. More than two fins are distributed and connected to the outer surface of the radiator, and a gap of more than two millimeters is set between the inner surface of the rotor housing and the control board.