Efficient and energy-saving direct-current brushless motor

Abstract

The invention relates to the technical field of brushless motors, and discloses an efficient and energy-saving direct-current brushless motor which comprises a driving shaft, a first hollow column is fixedly connected to the outer wall of the driving shaft, a magnet is fixedly connected to the inner wall of the first hollow column, and a first connecting ring is fixedly connected to the end, away from the driving shaft, of the first hollow column. The stator mechanism comprises a third connecting ring rotationally connected to the inner wall of the first connecting ring through a bearing, and the end, away from the first connecting ring, of the third connecting ring is fixedly connected with a bottom plate. By arranging the stator mechanism, when the motor rotates reversely, the airflow direction can be automatically switched along with reverse rotation of fan blades, and at the moment, a conical net effectively prevents dust from invading from the rear portion; the self-cleaning function is achieved through reverse airflow, long-term smoothness of a ventilation system is guaranteed through the structure, the motor can still keep excellent heat management performance under the complex working condition, and the environment adaptability and operation reliability of equipment are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of brushless motors, and particularly to a high-efficiency and energy-saving DC brushless motor. Background Art

[0002] A brushless DC motor consists of a motor main body and a driver, and is a typical mechatronic product. Since the brushless DC motor operates in an automatic control mode, it does not require an additional starting winding on the rotor like a synchronous motor under variable-frequency speed regulation during heavy-load starting, nor does it generate oscillations and loss of synchronization when the load suddenly changes.

[0003] The patent application with the application number CN201720754129.0 discloses a high-efficiency and energy-saving DC brushless motor, which includes an inner stator iron core fixedly arranged inside an outer rotor core, an excitation winding wound around the inner stator iron core, an inner rotor rotatably arranged inside the inner stator iron core, and a machine shell sleeved outside the outer rotor core. A permanent magnet is fixedly arranged on the inner rotor, and a driving circuit is arranged at one end of the outer rotor core. The driving circuit provides a driving current for the excitation winding. It has the advantages of long service life, high controllability, high efficiency, adjustable, low energy consumption, low noise, etc., and can be widely applied in multiple fields.

[0004] In the existing brushless motors, due to the lack of a heat dissipation mechanism, under continuous high-load working conditions, the temperature inside the motor shows an accumulative upward trend. With the long-term action of thermal stress, the working temperature of the permanent magnet is likely to exceed its critical threshold, resulting in irreversible demagnetization of the permanent magnet, and further causing the overall performance attenuation or even functional failure of the motor, leading to a decrease in the service life of the motor, which is not conducive to the long-term use of the equipment. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a high-efficiency and energy-saving DC brushless motor to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A high-efficiency and energy-saving DC brushless motor, including a drive shaft, an outer wall of the drive shaft is fixedly connected with a hollow column one, an inner wall of the hollow column one is fixedly connected with a magnet, one end of the hollow column one far from the drive shaft is fixedly connected with a connection ring one, and further includes: Stator mechanism, the stator mechanism includes a connecting ring three rotatably connected to the inner wall of the connecting ring one through a bearing. One end of the connecting ring three away from the connecting ring one is fixedly connected with a bottom plate. One side of the bottom plate away from the connecting ring three is fixedly connected with a housing. The outer wall of the bottom plate is fixedly connected with a hollow column four. A notch two is provided on the outer wall of the hollow column four. After the coil is energized, by controlling the coil current, the magnet and the hollow column one are driven to rotate. By setting the stator mechanism, when the motor rotates in reverse, as the fan blade rotates in reverse, the air flow direction will automatically switch. At this time, the conical net effectively blocks the intrusion of dust from the rear, and also realizes the self-cleaning function by using the reverse air flow. This structure ensures the long-term smoothness of the ventilation system, enables the motor to maintain excellent thermal management performance under complex working conditions, and improves the environmental adaptability and operation reliability of the equipment.

[0007] According to the above technical solution, a fan blade is fixedly connected to the outer wall of the hollow column one. One end of the fan blade away from the hollow column one is fixedly connected with a hollow column three. The outer wall of the hollow column three is rotatably connected to the hollow column four through a bearing. The rotation of the fan blade drives the flow of gas inside the equipment. By setting the fan blade between the hollow column three and the hollow column one, as the motor works, the fan blade will also rotate synchronously, guiding the external cooling air flow to penetrate the motor cavity along a preset path, quickly cooling the coil and the magnet. Compared with the passive heat dissipation method, active heat dissipation can control the temperature of the core components within the safety threshold, not only effectively extending the continuous operation time of the equipment, but also reducing the magnetic flux attenuation phenomenon caused by the increase in temperature.

[0008] According to the above technical solution, a lifting plate is fixedly connected to the outer wall of the hollow column one. A ventilation hole one is provided on the outer wall of the lifting plate. A notch one is provided on the outer wall of the hollow column one. The lifting plate and the ventilation hole one divide the gas inside the hollow column three, playing a role in the flow direction of the hollow gas. By setting the lifting plate and the ventilation hole one, the space inside the hollow column one can be divided into two parts. During the intake stage, most of the dust is intercepted through the ventilation hole one, and at the same time, the diversion design is used to make part of the air flow form a self-cleaning air curtain, continuously blowing the dust accumulated on the surface area of the ventilation hole one. This not only keeps the core components in a clean state, but also avoids the accumulation of dust on the lifting plate, effectively controlling the operating temperature of the motor and enabling the equipment to maintain long-term stable operation.

[0009] According to the above technical solution, a hollow column two is fixedly connected to one end of the lifting plate away from the hollow column one. A connecting ring two is fixedly connected to the inner wall of the hollow column two. The inner wall of the connecting ring two is fixedly connected to the hollow column one. The outer wall of the hollow column two is fixedly connected to the hollow column three. The hollow column two and the connecting ring two, in cooperation with the lifting plate, divide the gas inside the hollow column three into two parts.

[0010] According to the above technical solution, a second ventilation hole is provided at one end of the second hollow column away from the lifting plate. The second ventilation hole penetrates through the second hollow column and extends to the lifting plate. This second ventilation hole allows the gas in the third hollow column to communicate with the outside gas. By providing the second hollow column, as the lifting plate divides the airflow inside the device into two parts, the other part of the airflow will be discharged through the second ventilation hole on the second hollow column. Since the position of the second ventilation hole is in the peripheral part of the entire device, some heat generated by passive heat dissipation will accumulate near the second hollow column, and the rapidly flowing airflow can quickly take away the temperature on the second hollow column, further enhancing the heat dissipation function of the device, effectively extending the continuous operation time of the device, and also reducing the magnetic flux attenuation phenomenon caused by temperature rise.

[0011] According to the above technical solution, a first ventilation opening is provided on one side of the bottom plate close to the coil. A ventilation groove is provided on the inner wall of the first ventilation opening. The ventilation groove penetrates through the bottom plate and extends into the interior of the housing. This first ventilation opening and the ventilation groove allow the gas in the fourth hollow column to be exchanged with the gas in the housing.

[0012] According to the above technical solution, a conical net is fixedly connected to the inner wall of the housing. The inner wall of the conical net is fixedly connected to the housing. This conical net is used to filter impurities in the gas.

[0013] According to the above technical solution, a second ventilation opening is provided on the outer wall of the housing, and a third ventilation opening is provided on the outer wall of the housing. An annular plate is fixedly connected to the inner wall of the housing. The end of the annular plate away from the housing is arc-shaped, which can play a role in guiding the flow direction of the gas inside the working housing.

[0014] Compared with the prior art, the present invention provides a high-efficiency and energy-saving DC brushless motor, having the following beneficial effects: 1. By providing the fan blades between the third hollow column and the first hollow column, as the motor operates, the fan blades will also rotate synchronously, guiding the external cooling airflow to penetrate through the motor cavity along the preset path, quickly cooling the coil and the magnet. Compared with the passive heat dissipation method, the active heat dissipation can control the temperature of the core components within the safe threshold, not only effectively extending the continuous operation time of the device, but also reducing the magnetic flux attenuation phenomenon caused by temperature rise.

[0015] 2. By providing the lifting plate and the first ventilation hole, the space inside the first hollow column can be divided into two parts. During the air intake stage, most of the dust is intercepted through the first ventilation hole, and at the same time, the shunt design is used to make part of the airflow form a self-cleaning air curtain, continuously blowing the dust on the surface area of the first ventilation hole. This can not only keep the core components clean, but also prevent dust from accumulating on the lifting plate, effectively controlling the operating temperature of the motor and enabling the device to work stably for a long time.

[0016] 3. By providing the second hollow column in the present invention, as the lifting plate divides the airflow inside the device into two parts, the other part of the airflow will be discharged through the second ventilation holes on the second hollow column. Since the positions of the second ventilation holes are in the peripheral part of the whole device, some heat generated by passive heat dissipation will accumulate near the second hollow column, and the fast-flowing airflow can quickly take away the temperature on the second hollow column, further enhancing the heat dissipation function of the device, effectively extending the continuous operation time of the device, and also reducing the magnetic flux attenuation phenomenon caused by the temperature rise.

[0017] 4. By providing the stator mechanism in the present invention, when the motor rotates in reverse, as the fan blades rotate in reverse, the airflow direction will automatically switch. At this time, the conical net effectively blocks the intrusion of dust from the rear, and also realizes the self-cleaning function by using the reverse airflow. This structure ensures the long-term smoothness of the ventilation system, enables the motor to maintain excellent thermal management performance under complex working conditions, and improves the environmental adaptability and operation reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an exploded view of the overall structure of the present invention; Figure 3 is a cross-sectional view of the internal structure of the present invention; Figure 4 is an exploded view of the internal structure of the present invention; Figure 5 is a schematic diagram of the internal structure of the present invention; Figure 6 is a schematic diagram of the stator mechanism of the present invention; Figure 7 is a cross-section of the stator mechanism of the present invention Figure 1 ; Figure 8 is a cross-section of the stator mechanism of the present invention Figure 2 ; Figure 9 is of the present invention Figure 8 an enlarged view of A in.

[0019] In the figure: 1. drive shaft; 101. first hollow column; 102. magnet; 103. first notch; 104. lifting plate; 105. first ventilation hole; 106. first connecting ring; 107. fan blade; 108. second hollow column; 109. third hollow column; 1010. second connecting ring; 1011. second ventilation hole; 2. stator mechanism; 201. fourth hollow column; 202. bottom plate; 203. coil; 204. third connecting ring; 205. second notch; 206. first ventilation opening; 207. ventilation groove; 208. second ventilation opening; 209. third ventilation opening; 2010. annular plate; 2011. conical net; 2012. housing. Detailed implementation manners

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0022] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Embodiment 1: Refer to Figures 1 - 5, the present invention provides a technical solution: an efficient and energy-saving brushless DC motor, including a drive shaft 1. An outer wall of the drive shaft 1 is fixedly connected with a hollow column one 101. An inner wall of the hollow column one 101 is fixedly connected with a magnet 102. One end of the hollow column one 101 away from the drive shaft 1 is fixedly connected with a connection ring one 106. An outer wall of the hollow column one 101 is fixedly connected with a fan blade 107. One end of the fan blade 107 away from the hollow column one 101 is fixedly connected with a hollow column three 109. An outer wall of the hollow column three 109 is rotationally connected with a hollow column four 201 through a bearing. When the fan blade 107 rotates in reverse, the rotating fan blade 107 sucks external gas from a ventilation hole two 1011. The inhaled air flow will take away the heat on the hollow column two 108 and pass through the fan blade 107, and finally discharge the high-temperature gas in a notch two 205. An outer wall of the hollow column one 101 is fixedly connected with a lifting plate 104. A ventilation hole one 105 is formed in an outer wall of the lifting plate 104. A notch one 103 is formed in an outer wall of the hollow column one 101. The lifting plate 104 and the ventilation hole one 105 divert the gas inside the hollow column three 109, playing a role in the direction of the hollow gas flow. One end of the lifting plate 104 away from the hollow column one 101 is fixedly connected with a hollow column two 108. An inner wall of the hollow column two 108 is fixedly connected with a connection ring two 1010. An inner wall of the connection ring two 1010 is fixedly connected with the hollow column one 101. An outer wall of the hollow column two 108 is fixedly connected with the hollow column three 109. The hollow column two 108 and the connection ring two 1010, in cooperation with the lifting plate 104, divide the gas inside the hollow column three 109 into two parts. One end of the hollow column two 108 away from the lifting plate 104 is provided with a ventilation hole two 1011. The ventilation hole two 1011 penetrates the hollow column two 108 and extends to the lifting plate 104. When the motor operates, with the entry of current, the coil 203 drives the magnet 102 to move. The moving magnet 102 drives the hollow column one 101 to rotate. The rotating hollow column one 101 drives the fan blade 107 to rotate, and then the external gas is inhaled between the hollow column three 109 and the hollow column one 101 through the rotation of the fan blade 107. When the air flow moves to the area of the lifting plate 104, a part of the air flow is accelerated and passes through the outside of the lifting plate 104 under the extrusion of the lifting plate 104, while another part of the air flow passes through the ventilation hole one 105 from the inside of the lifting plate 104. When the air flow passing through the inside of the lifting plate 104 passes through the ventilation hole one 105, the dust mixed in the air flow will be isolated outside the ventilation hole one 105, and the air flow will enter the inside of the motor through the notch one 103. The air flow passing through the outside of the lifting plate 104, under the extrusion and acceleration of the lifting plate 104, takes away the dust accumulated on the ventilation hole one 105 and takes away the heat on the hollow column two 108 through the high-speed air flow.

[0024] Embodiment two: Please refer to Figures 6 - 9, on the basis of the first embodiment, the present invention provides a technical solution: a stator mechanism 2, which includes a connecting ring three 204 rotatably connected to the inner wall of the connecting ring one 106 through a bearing. One end of the connecting ring three 204 away from the connecting ring one 106 is fixedly connected to a bottom plate 202. One side of the bottom plate 202 away from the connecting ring three 204 is fixedly connected to a housing 2012. The outer wall of the bottom plate 202 is fixedly connected to a hollow column four 201. A notch two 205 is opened on the outer wall of the hollow column four 201. After the coil 203 is energized, by controlling the current of the coil 203, the magnet 102 and the hollow column one 101 are driven to rotate. A ventilation opening one 206 is opened on the side of the bottom plate 202 close to the coil 203. A ventilation groove 207 is opened on the inner wall of the ventilation opening one 206. The ventilation groove 207 penetrates through the bottom plate 202 and extends into the interior of the housing 2012. The ventilation opening one 206 and the ventilation groove 207 allow the gas in the hollow column four 201 to be exchanged with the gas in the housing 2012. As the device works, the air flow entering the vicinity of the coil 203 will send the air flow into the housing through the ventilation opening one 206 and the ventilation groove 207. The air flow in the housing will discharge the high-temperature gas from the motor through the ventilation opening two 208. A conical net 2011 is fixedly connected to the inner wall of the housing 2012. The inner wall of the conical net 2011 is fixedly connected to the housing 2012. The conical net 2011 is used to filter impurities in the gas. A ventilation opening two 208 is opened on the outer wall of the housing 2012. A ventilation opening three 209 is opened on the outer wall of the housing 2012. An annular plate 2010 is fixedly connected to the inner wall of the housing 2012. One end of the annular plate 2010 away from the housing 2012 is arc-shaped, which can play a role in guiding the flow direction of the gas inside the working housing 2012. When the motor rotates in reverse, due to the reverse rotation of the fan blade 107, the gas will enter the housing from the ventilation opening two 208. Part of the gas in the housing will be filtered through the conical net 2011, and the other part of the gas will pass through the surface of the conical net 2011, taking away the dust on the surface, and discharging the dust through the annular plate 2010 and the ventilation opening three 209. The gas entering the interior of the device will be discharged from the notch one 103 between the coil 203 and the magnet 102. The gas discharged from the notch one 103 will pass through the ventilation hole one 105, and under the rotation of the fan blade 107, the high-temperature gas will be discharged from the notch two 205.

[0025] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0026] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-efficiency and energy-saving direct current brushless motor, comprising a driving shaft (1), wherein the outer wall of the driving shaft (1) is fixedly connected to a hollow column (101), the inner wall of the hollow column (101) is fixedly connected to a magnet (102), and the end of the hollow column (101) away from the driving shaft (1) is fixedly connected to a connecting ring (106), characterized in that: Also includes: A stator mechanism (2), the stator mechanism (2) comprising a connecting ring three (204) rotatably connected to the inner wall of the connecting ring one (106) via a bearing, the connecting ring three (204) having an end away from the connecting ring one (106) fixedly connected to a bottom plate (202), the bottom plate (202) having a side away from the connecting ring three (204) fixedly connected to a housing (2012), the outer wall of the bottom plate (202) fixedly connected to a hollow column four (201), the outer wall of the hollow column four (201) being provided with a notch two (205), and after the coil (203) is energized, the magnet (102) and the hollow column one (101) are driven to rotate by controlling the current of the coil (203).

2. The high-efficiency and energy-saving brushless DC motor according to claim 1, characterized in that: The outer wall of the hollow column one (101) is fixedly connected to a fan blade (107), and one end of the fan blade (107) away from the hollow column one (101) is fixedly connected to the hollow column three (109). The outer wall of the hollow column three (109) is rotatably connected to the hollow column four (201) via a bearing, and the rotation of the fan blade (107) drives the flow of gas inside the device.

3. The high-efficiency and energy-saving brushless DC motor according to claim 2, characterized in that: The outer wall of the hollow column one (101) is fixedly connected with a lifting plate (104), and the outer wall of the lifting plate (104) is provided with a ventilation hole one (105). The outer wall of the hollow column one (101) is provided with a notch one (103). The lifting plate (104) and the ventilation hole one (105) divert the gas inside the hollow column three (109), thereby playing a role in the flow direction of the hollow gas.

4. The high-efficiency and energy-saving brushless DC motor according to claim 3, characterized in that: The end of the lifting plate (104) away from the hollow column one (101) is fixedly connected to the hollow column two (108), the inner wall of the hollow column two (108) is fixedly connected to the connecting ring two (1010), the inner wall of the connecting ring two (1010) is fixedly connected to the hollow column one (101), and the outer wall of the hollow column two (108) is fixedly connected to the hollow column three (109). With the cooperation of the lifting plate (104), the hollow column two (108) and the connecting ring two (1010) allow the gas in the hollow column three (109) to be divided into two parts.

5. The high-efficiency and energy-saving brushless DC motor according to claim 4, characterized in that: A second ventilation hole (1011) is provided at one end of the second hollow column (108) away from the lifting plate (104). The second ventilation hole (1011) penetrates the second hollow column (108) and extends to the lifting plate (104). The second ventilation hole (1011) allows the gas in the third hollow column (109) to circulate with the gas outside.

6. The high-efficiency and energy-saving brushless DC motor according to claim 5, characterized in that: A ventilation opening (206) is provided on one side of the bottom plate (202) close to the coil (203), and a ventilation groove (207) is provided on the inner wall of the ventilation opening (206). The ventilation groove (207) penetrates the bottom plate (202) and extends to the inside of the outer shell (2012). The ventilation opening (206) and the ventilation groove (207) allow the gas in the hollow column (201) to be exchanged with the gas in the outer shell (2012).

7. The high-efficiency and energy-saving brushless DC motor according to claim 6, characterized in that: The inner wall of the outer shell (2012) is fixedly connected to a conical net (2011); the inner wall of the conical net (2011) is fixedly connected to the outer shell (2012); the conical net (2011) is used to filter impurities in the gas.

8. The high-efficiency and energy-saving brushless DC motor according to claim 7, characterized in that: The outer wall of the shell (2012) is provided with a second ventilation opening (208), the outer wall of the shell (2012) is provided with a third ventilation opening (209), and the inner wall of the shell (2012) is fixedly connected with an annular plate (2010), and the end of the annular plate (2010) away from the shell (2012) is in an arc shape, so that it can play a role in the flow direction of the gas inside the working shell (2012).

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