Rapid heat dissipation device of brushless direct current motor

Abstract

The utility model provides a rapid heat dissipation device of a brushless direct current motor, which belongs to the technical field of heat dissipation of brushless direct current motors and comprises a front cover, a bearing fixedly connected in the front cover, an output shaft fixedly connected in the bearing, an inner shell fixedly connected on the side wall of the front cover, a stator arranged in the inner shell, a plurality of groups of coils wound on the stator, and a plurality of coils wound on the stator. The outer side wall of the output shaft is fixedly connected with an inner support, a plurality of magnetic blocks are arranged in the inner support in an embedded mode, the outer sides of the magnetic blocks are wrapped with a lining frame, the outer side wall of the output shaft is fixedly connected with fan blades, the fan blades are fixedly connected with a plurality of first blades, and the end of the output shaft is provided with a rear cover. According to the utility model, through the arrangement of the heat radiation assembly, the plurality of heat radiation fins are kept not in a high temperature state, the temperature of the motor is reduced, and the normal work and the service life of the motor are prevented from being influenced by too high temperature.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for brushless DC motors, and more specifically, to a rapid heat dissipation device for brushless DC motors. Background Technology

[0002] Brushless DC motors are high-efficiency electric motors widely used in various applications requiring high precision, high efficiency, and long lifespan. Unlike traditional brushed DC motors, brushless DC motors do not have mechanical brushes or commutators; instead, they use electronic controllers to control the motor's rotation.

[0003] When a brushless DC motor is running, heat is generated due to resistance losses and core losses (including hysteresis and eddy current losses), increasing the motor's temperature. If the motor is under high load or overload for an extended period, the generated heat may not dissipate in time, causing the motor temperature to rise continuously. This not only reduces the motor's efficiency but may also accelerate the aging of the internal insulation materials, potentially causing insulation breakdown and motor damage. Furthermore, excessively high temperatures can affect the performance of the permanent magnets inside the motor, potentially leading to weakened magnetism or permanent demagnetization, severely impacting the motor's normal operation and lifespan.

[0004] How to invent a rapid heat dissipation device for brushless DC motors to improve these problems has become an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a rapid heat dissipation device for a brushless DC motor, aiming to improve the problems mentioned in the background.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a rapid heat dissipation device for a brushless DC motor, including a front cover, a bearing fixedly connected inside the front cover, an output shaft fixedly connected inside the bearing, an inner shell fixedly connected to the side wall of the front cover, a stator disposed inside the inner shell, multiple sets of coils wound on the stator, multiple wires disposed on the coils, an inner bracket fixedly connected to the outer wall of the output shaft, multiple magnetic blocks embedded in the inner bracket, a bushing disposed on the outer side of the multiple magnetic blocks, a fan blade fixedly connected to the outer wall of the output shaft, multiple first blades fixedly connected to the fan blade, a rear cover disposed at the end of the output shaft, the rear cover being fixedly connected to the inner shell, and a heat dissipation component disposed on one side of the inner shell.

[0008] Preferably, the front cover has multiple front heat dissipation windows, the inner shell is fitted to the stator, and the inner sidewall of the bushing is fixedly connected with multiple partition blocks.

[0009] Preferably, the wires are connected to an external electronic controller.

[0010] Preferably, the inner shell has multiple heat sinks fixedly connected inside, and the outer shell is installed around the multiple heat sinks.

[0011] Preferably, multiple first blades are arranged circumferentially at equal intervals, and multiple rear heat dissipation windows are provided on the rear cover.

[0012] Preferably, the heat dissipation assembly includes a circular rotating frame rotatably connected to the housing, a plurality of second blades fixedly connected to the inner side wall of the circular rotating frame, a plurality of support frames fixedly connected to the side wall of the circular rotating frame, a ring gear fixedly connected to the end of the plurality of support frames, a shaft bracket fixedly connected to the side wall of the rear cover, a rotating shaft rotatably connected inside the shaft bracket, a small gear fixedly sleeved on the outer side of the rotating shaft, and a large gear fixedly sleeved on the outer side wall of the output shaft.

[0013] Preferably, the pinion and the gear are meshed, and the multiple second blades are inclined along the length of the output shaft.

[0014] The beneficial effects of this utility model are as follows: By setting up fan blades, the output shaft drives the fan blades to rotate. Under the action of centrifugal force, the airflow enters the gap between multiple magnetic blocks from the front heat dissipation window, carrying away the heat generated by the multiple magnetic blocks and cooling them down. By setting up a heat dissipation assembly, the rotation of the output shaft causes multiple second blades to rotate, and air is drawn into the low-pressure area from the gap between multiple heat sinks and flows to the high-pressure area. The continuously flowing airflow carries away the heat on the multiple heat sinks, keeping them from being in a high-temperature state, reducing the temperature of the motor, and preventing the normal operation and lifespan of the motor from being affected by excessive temperature. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of a rapid heat dissipation device for a brushless DC motor provided by an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram showing the location of the heat sink in a rapid heat dissipation device for a brushless DC motor, provided by an embodiment of this utility model.

[0018] Figure 3 This is a schematic diagram of the magnetic block position of a rapid heat dissipation device for a brushless DC motor provided by an embodiment of this utility model;

[0019] Figure 4This is a schematic diagram of the heat dissipation component structure of a rapid heat dissipation device for a brushless DC motor provided by an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram of gear meshing in a rapid heat dissipation device for a brushless DC motor provided by an embodiment of this utility model.

[0021] In the diagram: 1. Front cover; 2. Bearing; 3. Output shaft; 4. Inner shell; 5. Stator; 6. Coil; 7. Wire; 8. Inner support; 9. Magnet; 10. Front heat dissipation window; 11. Bushing; 110. Separator block; 12. Fan blade; 13. First blade; 14. Rear cover; 41. Heat sink; 42. Outer shell; 140. Rear heat dissipation window; 15. Circular rotating frame; 21. Second blade; 16. Support frame; 17. Ring gear; 18. Shaft support; 19. Rotating shaft; 20. Small gear; 22. Large gear. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example, refer to Figures 1-5 A rapid heat dissipation device for a brushless DC motor includes a front cover 1, a bearing 2 fixedly connected inside the front cover 1, an output shaft 3 fixedly connected inside the bearing 2, an inner shell 4 fixedly connected to the side wall of the front cover 1, a stator 5 disposed inside the inner shell 4, multiple sets of coils 6 wound on the stator 5, multiple wires 7 disposed on the coils 6, an inner bracket 8 fixedly connected to the outer wall of the output shaft 3, multiple magnetic blocks 9 embedded in the inner bracket 8, a bushing 11 wrapped around the outer side of the multiple magnetic blocks 9, a fan blade 12 fixedly connected to the outer wall of the output shaft 3, multiple first blades 13 fixedly connected to the fan blade 12, a rear cover 14 disposed at the end of the output shaft 3, the rear cover 14 fixedly connected to the inner shell 4, a heat dissipation component disposed on one side of the inner shell 4, and multiple front heat dissipation windows 10 opened on the front cover 1.

[0024] The inner shell 4 is fitted to the stator 5, so that the heat generated by the stator 5 can be effectively transferred to the inner shell 4. Multiple partition blocks 110 are fixedly connected to the inner side wall of the bushing 11. The wire 7 is connected to the external electronic controller. The electronic controller energizes multiple coils 6 on the stator 5 to generate an initial magnetic field. Multiple magnetic blocks 9 start to rotate under the force of the initial magnetic field. Multiple heat sinks 41 are fixedly connected inside the inner shell 4. The multiple heat sinks 41 increase the surface area in contact with the air. By absorbing the heat on the inner shell 4, the heat energy of the inner shell 4 is accelerated. The outer shell 42 is installed on the outside of the multiple heat sinks 41. Multiple first blades 13 are arranged equidistantly in a circle. Multiple rear heat dissipation windows 140 are opened on the rear cover 14.

[0025] The heat dissipation assembly includes a circular rotating frame 15 rotatably connected to the outer casing 42. Multiple second blades 21 are fixedly connected to the inner side wall of the circular rotating frame 15. Multiple support frames 16 are fixedly connected to the side wall of the circular rotating frame 15. A ring gear 17 is fixedly connected to the end of the multiple support frames 16. A shaft bracket 18 is fixedly connected to the side wall of the rear cover 14. A rotating shaft 19 is rotatably connected inside the shaft bracket 18. A small gear 20 is fixedly sleeved on the outer side of the rotating shaft 19. A large gear 22 is fixedly sleeved on the outer side wall of the output shaft 3. The small gear 20 and the large gear 22 are meshed. The multiple second blades 21 are inclined in the length direction of the output shaft 3.

[0026] The working principle of this rapid heat dissipation device for a brushless DC motor is as follows: By energizing multiple sets of coils 6, multiple magnetic blocks 9 are rotated by the magnetic field generated by the multiple sets of coils 6, which drives the output shaft 3 to rotate. The output shaft 3 drives the fan blades 12 to rotate. When the multiple first blades 13 rotate, under the action of centrifugal force, the air is pushed from the center of the fan blades 12 to the outside, and a negative pressure is generated at the center of the fan blades 12. The airflow enters the gap between the multiple magnetic blocks 9 from the front heat dissipation window 10, and takes away the heat generated by the multiple magnetic blocks 9. The heated airflow is blown out from the rear heat dissipation window 140. The fan blades 12 continue to rotate to dissipate heat for the multiple magnetic blocks 9. The rotation of the output shaft 3 also drives the large gear 22 to rotate. The large gear 22 drives the small gear 20 and the ring gear 17 to rotate. The ring gear 17 drives the circular rotating frame 15 and the multiple second blades 21 to rotate through multiple support frames 16. Since the multiple second blades 21 are inclined, the rotating multiple second blades 21 cut the surrounding air and generate a pressure difference. A low-pressure area is generated on the side close to the outer casing 42, and a high-pressure area is generated on the side away from the outer casing 42. Air is drawn into the low-pressure area from the gap between the multiple heat sinks 41 and flows to the high-pressure area. The airflow generated by the continuous flow carries away the heat on the multiple heat sinks 41, keeping the multiple heat sinks 41 from being in a high-temperature state.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 of the present invention.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rapid heat dissipation device for a brushless DC motor, comprising a front cover (1), characterized in that, The front cover (1) is fixedly connected to a bearing (2), the bearing (2) is fixedly connected to an output shaft (3), the side wall of the front cover (1) is fixedly connected to an inner shell (4), the inner shell (4) is provided with a stator (5), the stator (5) is wound with multiple sets of coils (6), the coils (6) are provided with multiple wires (7), the outer side wall of the output shaft (3) is fixedly connected to an inner bracket (8), the inner bracket (8) is embedded with multiple magnetic blocks (9), the outer side of the multiple magnetic blocks (9) is wrapped with a bushing (11), the outer side wall of the output shaft (3) is fixedly connected to a fan blade (12), the fan blade (12) is fixedly connected with multiple first blades (13), the end of the output shaft (3) is provided with a rear cover (14), the rear cover (14) is fixedly connected to the inner shell (4), and a heat dissipation component is provided on one side of the inner shell (4).

2. The rapid heat dissipation device for a brushless DC motor according to claim 1, characterized in that, The front cover (1) is provided with multiple front heat dissipation windows (10), the inner shell (4) is fitted with the stator (5), and the inner sidewall of the bushing (11) is fixedly connected with multiple partition blocks (110).

3. The rapid heat dissipation device for a brushless DC motor according to claim 1, characterized in that, The wire (7) is connected to an external electronic controller.

4. The rapid heat dissipation device for a brushless DC motor according to claim 1, characterized in that, The inner shell (4) is fixedly connected to a plurality of heat sinks (41), and the outer shell (42) is wrapped around the outside of the plurality of heat sinks (41).

5. The rapid heat dissipation device for a brushless DC motor according to claim 1, characterized in that, Multiple first blades (13) are arranged circumferentially at equal intervals, and multiple rear heat dissipation windows (140) are provided on the rear cover (14).

6. The rapid heat dissipation device for a brushless DC motor according to claim 4, characterized in that, The heat dissipation assembly includes a circular rotating frame (15) rotatably connected to the outer casing (42). Multiple second blades (21) are fixedly connected to the inner side wall of the circular rotating frame (15). Multiple support frames (16) are fixedly connected to the side wall of the circular rotating frame (15). A ring gear (17) is fixedly connected to the end of the multiple support frames (16). A shaft bracket (18) is fixedly connected to the side wall of the rear cover (14). A rotating shaft (19) is rotatably connected inside the shaft bracket (18). A small gear (20) is fixedly sleeved on the outer side of the rotating shaft (19). A large gear (22) is fixedly sleeved on the outer side wall of the output shaft (3).

7. The rapid heat dissipation device for a brushless DC motor according to claim 6, characterized in that, The small gear (20) is meshed with the large gear (22), and the multiple second blades (21) are inclined in the length direction of the output shaft (3).

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