A high heat dissipation type DC permanent magnet synchronous servo motor and use method thereof

Abstract

The present invention discloses a high heat dissipation type DC permanent magnet synchronous servo motor and a method of using the same, which relates to the field of motor technology, and includes a central shaft and a stator, wherein a rotor is arranged in the middle of the outer surface of the central shaft, and the stator is sleeved on the outside of the rotor, and a cover is arranged on one side of the outer surface of the central shaft. In the present invention, as the temperature of the brush assembly increases, the thermal expansion coefficient of the material will cause the brush to deform slightly or adjust its position, and this change can help maintain a good contact pressure between the brush and the commutation copper sheet, thereby reducing the increase in contact resistance caused by the increase in temperature. Under high temperature conditions, the graphite powder produced by the wear of the brush will form a conductive film on the surface of the commutation copper sheet. Although graphite itself is a conductor, if it is unevenly distributed, it will lead to poor local contact. Appropriate temperature control and design can ensure that the graphite layer is more evenly distributed on the commutation copper sheet, which helps to improve the quality of electrical contact.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a high heat dissipation type DC permanent magnet synchronous servo motor and a use method thereof. Background Art

[0002] For example, the patent document with publication number CN118214197B discloses a heat dissipation method for a generator set. By setting a thermal heat sink, the fin part pops up when the shell temperature rises, thereby connecting the inside and outside of the shell to achieve air exchange and rapid heat dissipation. When the generator is not running or the operating temperature is low, the fin part does not pop up. Then, the thermal heat sink is sealed under the action of the dustproof sponge to prevent dust from falling in.

[0003] During the long-term operation of the motor, the friction between the brush and the converter will generate heat. As the temperature rises, the graphite powder produced by the wear of the brush under high temperature conditions will form a conductive film on the surface of the commutation copper sheet. Although graphite itself is a conductor, if it is unevenly distributed, it may cause local poor contact. In addition, the brush and the converter are fixed at one point and continuously wear, resulting in uneven distribution of the contact points between the brush and the converter, causing wear. At the same time, due to the mechanical movement caused by temperature changes, the surface of the converter will produce impurities and oxides, which will reduce the electrical contact performance, thereby increasing the possibility of arc discharge and the occurrence rate of sparks. Sparks not only consume energy, but also generate electromagnetic interference (EMI), affecting the working stability of motors and other electronic equipment. Therefore, the present application provides a high heat dissipation type DC permanent magnet synchronous servo motor and a method of use, which improves the contact mechanism to provide more stable current transmission and reduce EMI levels. Summary of the invention

[0004] The purpose of the present application is to provide a high heat dissipation type DC permanent magnet synchronous servo motor and a method of use, which can effectively solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a high heat dissipation type DC permanent magnet synchronous servo motor, comprising a central shaft and a stator, a rotor is arranged in the middle of the outer surface of the central shaft, and the stator is sleeved on the outside of the rotor, a cover is arranged on one side of the outer surface of the central shaft, a commutation copper sheet is arranged on the outer surface of the central shaft, a brush assembly is sleeved on the outside of the commutation copper sheet and the electrical contact position with the commutation copper sheet is adjusted according to the motor temperature, a fan guide mechanism for extracting air between the rotor and the stator is arranged on the outer surface of the central shaft and located between the rotor and the commutation copper sheet, a heat dissipation mechanism for extracting external air and sending it between the rotor and the stator is arranged at one end of the central shaft, a guide mechanism for guiding air to be discharged from the inside of the motor is arranged on one side of the heat dissipation mechanism, and a flow guide mechanism fixed on the outer surface of the stator and guiding the airflow to cool the stator is arranged between the guide mechanism and the cover.

[0006] Among them, the guide mechanism includes a casing, the outer surface of the casing is provided with a plurality of heat sinks distributed in a circular array, one side of the outer surface of the plurality of heat sinks is commonly provided with an outer ring, the inner wall of the casing is provided with a plurality of spiral blades distributed in a circular array, one side of the casing is provided with a sealing shell, the sealing shell is fixedly installed on one side of the cover, and the plurality of spiral blades are all provided on the outer surface of the stator.

[0007] Among them, the guide fan mechanism includes an inner shell, which is fixedly installed on the outer surface of the central axis. The outer surface of the inner shell is provided with a plurality of rotating vanes distributed in a circular array, and the inner walls of the plurality of rotating vanes are commonly provided with guide ring pieces.

[0008] The heat dissipation mechanism comprises a rear cover and a cone shell, a bearing is arranged on the inner wall of the rear cover, and the bearing sleeve is arranged outside the central axis, and a plurality of ventilation holes are opened on one side of the rear cover.

[0009] Among them, the conical shell is fixedly installed on the outer surface of the central axis, the inner wall of the conical shell is provided with a filter screen for filtering air, the inner wall of the conical shell is provided with a plurality of through holes distributed in a circular array, the outer surface of the through holes is provided with a plurality of rotary blades distributed in a circular array, and a blocking ring is commonly provided on one side of the plurality of rotary blades, and the conical shell is in the shape of a funnel.

[0010] Wherein, the guiding mechanism includes a collar, which is fixedly mounted on one side of the rear cover by bolts, an arc ring is provided on one side of the collar, and the arc ring is fixedly mounted on one side of the outer ring by bolts, and the arc ring is used to guide the airflow inside the casing to be discharged to the outside of the casing.

[0011] The inner wall of the collar is provided with a plurality of leakage holes distributed in a ring array, and a filter ring for filtering air is arranged between the collar and the arc ring.

[0012] Wherein, the brush assembly includes a cover tube, which is fixedly installed on one side of the cover, and the outer surface of the cover tube is provided with a plurality of slide grooves distributed in a circular array, and a guide rod is arranged inside the slide groove, and an electrical installation ring is slidably installed on the outer surfaces of the plurality of guide rods together, and a first spring is arranged on the outer surfaces of the plurality of guide rods and on one side of the electrical installation ring.

[0013] Among them, fixed plates are symmetrically arranged inside the electrical installation ring, a controller is arranged on one side of the two fixed plates, ink brushes are slidably installed inside the two controllers, and a second spring is arranged on one side of the two ink brushes, and the two ink brushes are in contact with the reversing copper plate, two bimetallic plates are symmetrically arranged on one side of the two fixed plates, a heat conducting plate is commonly arranged at one end of the two bimetallic plates, and one end of the two heat conducting plates is connected to the inner wall of the cover tube.

[0014] The present invention provides a method for using a high heat dissipation type DC permanent magnet synchronous servo motor, and the method for using is as follows:

[0015] S1. The commutation copper sheet is electrically connected through the brush assembly, so that the rotor drives the central shaft to rotate, and the central shaft will also drive the commutation copper sheet to rotate. When the commutation copper sheet rotates for a long time, more heat energy is generated between the brush assembly and the commutation copper sheet due to friction. When the temperature of the brush assembly rises, the position of electrical contact with the commutation copper sheet will be changed, so as to prevent the problem of poor contact caused by graphite adsorption on the surface of the commutation copper sheet due to the high temperature of the commutation copper sheet;

[0016] S2. When the central shaft rotates, the guide fan mechanism and the heat dissipation mechanism will also rotate. The heat dissipation mechanism rotates to draw air from the outside of the guide mechanism into between the rotor and the stator, while the guide fan mechanism draws air between the rotor and the stator into the inside of the guide mechanism as the central shaft rotates.

[0017] S3. After the fan guide mechanism guides the air into the interior of the guide mechanism, the guide mechanism guides the air to be discharged from the outer surface of the stator. The flowing air takes away the heat on the stator surface and is then guided out through the guide mechanism, so that the air forms a cycle inside the guide mechanism before being discharged.

[0018] In summary, the technical effects and advantages of the present invention are as follows:

[0019] 1. In the present invention, as the temperature of the brush assembly increases, the thermal expansion coefficient of the material will cause the brush to deform slightly or adjust its position. This change can help maintain a good contact pressure between the brush and the commutation copper sheet, thereby reducing the increase in contact resistance caused by the temperature increase. Under high temperature conditions, the graphite powder produced by brush wear will form a conductive film on the surface of the commutation copper sheet. Although graphite itself is a conductor, if it is unevenly distributed, it will lead to local poor contact. Appropriate temperature control and design can ensure that the graphite layer is more evenly distributed on the commutation copper sheet, which helps to improve the quality of electrical contact. Moreover, the displacement that occurs when the brush temperature rises can make different areas of the brush contact the commutation copper sheet in turn, rather than being fixed at one point and continuously worn, which can distribute the wear more evenly and extend the overall service life of the brush. Moreover, the mechanical movement caused by temperature changes can help to remove impurities and oxides on the surface of the commutation copper sheet to a certain extent, keep the contact surface clean, and further enhance the electrical contact performance. Good electrical contact reduces the possibility of arc discharge and reduces the incidence of sparks. Sparks not only consume energy, but also generate electromagnetic interference EMI, affecting the working stability of motors and other electronic equipment. Therefore, the improved contact mechanism helps to provide more stable current transmission and reduce EMI levels.

[0020] 2. The coordinated work of the fan guide mechanism and the heat dissipation mechanism in the present invention creates a forced convection system, which effectively introduces external cold air into the motor and discharges the heated air to take away the heat more quickly. The flow guide mechanism and the guiding mechanism ensure that the air forms an orderly flow path inside the motor, covering the entire stator surface and the area around the rotor to evenly distribute the cooling airflow to avoid local overheating. Continuous and effective cooling can prevent thermal stress caused by high temperature in the motor and reduce the risk of deformation or damage to parts. Especially for precision components such as brushes and commutators, the designed flow guide mechanism and guiding mechanism can make the air flow smoother, reduce turbulence, and thus reduce operating noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of a DC permanent magnet synchronous servo motor;

[0023] Figure 2 It is a first-perspective three-dimensional structural cross-sectional view of a DC permanent magnet synchronous servo motor;

[0024] Figure 3 It is a sectional view of the three-dimensional structure of the DC permanent magnet synchronous servo motor from a second perspective;

[0025] Figure 4 It is a third-angle perspective three-dimensional structural cross-sectional view of the DC permanent magnet synchronous servo motor;

[0026] Figure 5 It is a schematic diagram of the three-dimensional connection structure of a DC permanent magnet synchronous servo motor;

[0027] Figure 6 It is a schematic diagram of the three-dimensional connection structure of the diversion mechanism;

[0028] Figure 7 It is a cross-sectional view of the three-dimensional connection structure of the flow guide mechanism;

[0029] Figure 8 It is a schematic diagram of the local three-dimensional connection structure of a DC permanent magnet synchronous servo motor;

[0030] Fig. 9 It is a schematic diagram of the three-dimensional connection structure of the fan guide mechanism;

[0031] Fig.10 It is a schematic diagram of the three-dimensional connection structure of the diversion mechanism and the guiding mechanism;

[0032] Fig.11 It is a cross-sectional view of the three-dimensional connection structure of the diversion mechanism and the guiding mechanism;

[0033] Fig.12 It is a schematic diagram of the three-dimensional connection structure of the heat dissipation mechanism;

[0034] Fig.13 It is a cross-sectional view of the three-dimensional connection structure of the heat dissipation mechanism;

[0035] Fig.14 It is a schematic diagram of the three-dimensional connection structure of the commutation copper sheet and the brush assembly;

[0036] Fig.15 It is a schematic diagram of the three-dimensional connection structure of the brush assembly;

[0037] Fig.16 It is a schematic diagram of a partial three-dimensional connection structure of a brush assembly;

[0038] Fig.17 This is a schematic diagram of the three-dimensional connection structure of the bimetallic strip and the electrical mounting ring.

[0039] In the figure: 1. guide mechanism; 11. heat sink; 12. sealing shell; 13. spiral sheet; 14. outer ring; 15. casing; 2. central axis; 3. guiding mechanism; 31. sleeve ring; 32. filter ring; 33. arc ring; 34. leakage hole; 4. cover; 5. brush assembly; 51. cover tube; 52. slide groove; 53. guide rod; 54. first spring; 55. electrical installation ring; 56. bimetallic sheet; 57. controller; 58. ink brush; 59. second spring; 511. heat conducting sheet; 50. fixing sheet; 6. stator; 7. fan guide mechanism; 71. inner shell; 72. guide ring sheet; 73. rotary sheet; 8. rotor; 9. heat dissipation mechanism; 91. baffle ring sheet; 92. cone shell; 93. through hole; 94. rotary vane; 95. rear cover; 96. filter screen; 10. reversing copper sheet. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1, Reference Figures 1 to 17 A high heat dissipation DC permanent magnet synchronous servo motor shown in the figure includes a central shaft 2 and a stator 6, a rotor 8 is arranged in the middle of the outer surface of the central shaft 2, and the stator 6 is sleeved on the outside of the rotor 8, a cover 4 is arranged on one side of the outer surface of the central shaft 2, a commutation copper sheet 10 is arranged on the outer surface of the central shaft 2, a brush assembly 5 is sleeved on the outside of the commutation copper sheet 10 and the electrical contact position with the commutation copper sheet 10 is adjusted according to the motor temperature, a fan guide mechanism 7 for extracting air between the rotor 8 and the stator 6 is arranged on the outer surface of the central shaft 2 and between the rotor 8 and the commutation copper sheet 10, a heat dissipation mechanism 9 for extracting external air and sending it between the rotor 8 and the stator 6 is arranged at one end of the central shaft 2, a guide mechanism 3 for guiding air to be discharged from the inside of the motor is arranged on one side of the heat dissipation mechanism 9, and a flow guide mechanism 1 fixed on the outer surface of the stator 6 and guiding the airflow to cool the stator 6 is arranged between the guide mechanism 3 and the cover 4.

[0042] The commutation copper sheet 10 is electrically connected through the brush assembly 5, so that the rotor 8 drives the central shaft 2 to rotate, and the central shaft 2 will also drive the commutation copper sheet 10 to rotate. When the commutation copper sheet 10 rotates for a long time, more heat energy is generated between the brush assembly 5 and the commutation copper sheet 10 due to friction. When the temperature of the brush assembly 5 increases, the position of the electrical contact with the commutation copper sheet 10 will be changed, so as to prevent the problem of poor contact caused by graphite adsorption on the surface of the commutation copper sheet 10 due to the high temperature of the commutation copper sheet 10.

[0043] Among them, as the temperature of the brush assembly 5 increases, the thermal expansion coefficient of the material will cause the brush to deform slightly or adjust its position. This change can help maintain a good contact pressure between the brush and the commutation copper sheet 10, thereby reducing the increase in contact resistance caused by the temperature increase. Under high temperature conditions, the graphite powder produced by brush wear will form a conductive film on the surface of the commutation copper sheet. Although graphite itself is a conductor, if it is not evenly distributed, it will lead to local poor contact. Appropriate temperature control and design can ensure that the graphite layer is more evenly distributed on the commutation copper sheet, which helps to improve the quality of electrical contact.

[0044] Moreover, the displacement that occurs when the brush temperature rises can make different areas of the brush contact the commutation copper sheet in turn, rather than being fixed at one point and continuously worn, which can distribute the wear more evenly and extend the overall service life of the brush. In addition, the mechanical movement caused by temperature changes can help to remove impurities and oxides on the surface of the commutation copper sheet to a certain extent, keep the contact surface clean, and further enhance the electrical contact performance.

[0045] Good electrical contact reduces the possibility of arc discharge and reduces the incidence of sparks. Sparks not only consume energy, but also generate electromagnetic interference EMI, affecting the working stability of motors and other electronic equipment. Therefore, the improved contact mechanism helps to provide more stable current transmission and reduce EMI levels.

[0046] When the central shaft 2 rotates, the fan guide mechanism 7 and the heat dissipation mechanism 9 will also be driven to rotate. The heat dissipation mechanism 9 rotates to draw the air outside the guide mechanism 1 into the space between the rotor 8 and the stator 6, and the fan guide mechanism 7 draws the air between the rotor 8 and the stator 6 into the interior of the guide mechanism 1 as the central shaft 2 rotates.

[0047] After the fan guide mechanism 7 guides the air into the interior of the guide mechanism 1, the guide mechanism 1 guides the air to be discharged from the outer surface of the stator 6. The flowing air takes away the heat on the surface of the stator 6 and is then guided and discharged through the guide mechanism 3, so that the air forms a cycle inside the guide mechanism 1 before being discharged.

[0048] The cooperation of the fan guide mechanism 7 and the heat dissipation mechanism 9 creates a forced convection system, which effectively introduces external cold air into the motor and discharges the heated air to take away the heat more quickly. The guide mechanism 1 and the guide mechanism 3 ensure that the air forms an orderly flow path inside the motor, covering the entire surface of the stator 6 and the area around the rotor 8 to evenly distribute the cooling airflow and avoid local overheating.

[0049] Continuous and effective cooling can prevent thermal stress caused by high temperature in the motor and reduce the risk of deformation or damage of components, especially for precision components such as brushes and commutators. The designed guide mechanism 1 and guide mechanism 3 can make the air flow smoother, reduce turbulence, and thus reduce operating noise.

[0050] Embodiment 2: Based on the air guide mechanism 1, the fan guide mechanism 7, the heat dissipation mechanism 9 and the guiding mechanism 3 provided in Embodiment 1, this embodiment provides a further technical solution for the air guide mechanism 1, the fan guide mechanism 7, the heat dissipation mechanism 9 and the guiding mechanism 3.

[0051] The inner wall of the collar 31 is provided with a plurality of leak holes 34 distributed in a ring array, and a filter ring 32 for filtering air is provided between the collar 31 and the arc ring 33 .

[0052] The conical shell 92 is fixedly mounted on the outer surface of the central axis 2, and a filter screen 96 for filtering air is provided on the inner wall of the conical shell 92. A plurality of through holes 93 distributed in a circular array are opened on the inner wall of the conical shell 92, and a plurality of rotary blades 94 distributed in a circular array are provided on the outer surface of the through holes 93, and a blocking ring 91 is provided on one side of the plurality of rotary blades 94, and the conical shell 92 is in the shape of a funnel.

[0053] It is worth noting that when in use, the rotation of the central shaft 2 drives the rotor 8 to rotate. Because the rotor 8 and the stator 6 will generate a magnetic field when the winding group is energized during use, they will also generate a lot of heat. When the central shaft 2 rotates, it will drive the cone shell 92 to rotate, and the cone shell 92 will drive the rotary vane 94 and the blocking ring 91 to rotate. The rotary vane 94 rotates to draw external air through the leakage hole 34, and the filter ring 32 is set to filter the air flowing through the leakage hole 34. Because the cone shell 92 is set in a funnel shape, the air drawn by the rotary vane 94 is sent along the outer wall of the cone shell 92 to between the rotor 8 and the stator 6.

[0054] The heat dissipation mechanism 9 includes a rear cover 95 and a cone shell 92 . A bearing is disposed on the inner wall of the rear cover 95 , and the bearing sleeve is disposed outside the central axis 2 . A plurality of ventilation holes are provided on one side of the rear cover 95 .

[0055] When the rotary blades 94 draw air into the space between the rotor 8 and the stator 6, the negative pressure generated by the gas flow will guide the air on one side of the rear cover 95 to enter the interior of the rotor 8 and the stator 6 through the through hole 93, and the filter net 96 is used to filter the air entering the space between the rotor 8 and the stator 6 through the through hole 93.

[0056] The fan guide mechanism 7 includes an inner shell 71, which is fixedly mounted on the outer surface of the central shaft 2. The outer surface of the inner shell 71 is provided with a plurality of rotating vanes 73 distributed in a ring array, and the inner walls of the plurality of rotating vanes 73 are commonly provided with guide ring pieces 72.

[0057] It is worth noting that when the central shaft 2 rotates, the inner shell 71 will be driven to rotate, and the inner shell 71 will drive the vane 73 to rotate. The guide ring 72 rotates with the vane 73 to guide the airflow into the interior of the guide mechanism 1. The inner shell 71 is conical in shape and cooperates with the guide ring 72 to guide the airflow into the interior of the guide mechanism 1. The vane 73 is set to extract the air between the rotor 8 and the stator 6, and the vane 94 sends the external air into the rotor 8 and the stator 6, so that the air between the rotor 8 and the stator 6 can circulate quickly, and the rotor 8 and the stator 6 can be cooled by the rapid circulation of air.

[0058] The guide mechanism 1 includes a casing 15, the outer surface of which is provided with a plurality of heat sinks 11 distributed in a circular array, an outer ring 14 is commonly provided on one side of the outer surfaces of the plurality of heat sinks 11, the inner wall of the casing 15 is provided with a plurality of spiral blades 13 distributed in a circular array, a sealing shell 12 is provided on one side of the casing 15, the sealing shell 12 is fixedly mounted on one side of the cover 4, and the plurality of spiral blades 13 are all provided on the outer surface of the stator 6.

[0059] It is worth mentioning that when the vane 73 draws the air inside the rotor 8 and the stator 6 into the interior of the casing 12, the air will flow from the outer surface of the stator 6 under the guidance of the spiral vane 13, and the air will take away the heat from the surface of the stator 6. The spiral vane 13 is set in a spiral shape, so that the air flows in a spiral inside the casing 15 under the guidance of the spiral vane 13.

[0060] The guide mechanism 3 includes a collar 31, which is fixedly mounted on one side of the rear cover 95 by bolts, an arc ring 33 is provided on one side of the collar 31, and the arc ring 33 is fixedly mounted on one side of the outer ring 14 by bolts, and the arc ring 33 is used to guide the airflow inside the casing 15 to be discharged to the outside of the casing 15.

[0061] It is worth mentioning that after the air is guided and circulated through the spiral blades 13, the air will be blown into between the heat sinks 11 through the guidance of the guide mechanism 3, so that the circulated air is discharged to the outside of the shell 15, and the air blown out through the arc ring 33 can also take away the heat on the surface of the heat sink 11.

[0062] Among them, the central axis 2 drives the cone shell 92, the rotary vane 94 and the baffle ring 91 to rotate. The rotary vane 94 draws external air through the leakage hole 34, and sends it to the space between the rotor 8 and the stator 6 after being filtered by the filter ring 32. At the same time, the inner shell 71 drives the rotary vane 73 to rotate, and further guides the airflow into the guide mechanism 1. The dual mechanism ensures sufficient air flow and forms efficient forced convection cooling. The negative pressure generated when the rotary vane 94 draws air will guide the air on one side of the rear cover 95 through the through hole 93 to enter between the rotor 8 and the stator 6. The filter screen 96 ensures that the incoming air is clean, and the air flow speed is increased by the assistance of negative pressure.

[0063] The cone shell 92 is funnel-shaped, which helps to concentrate and guide the air to be evenly delivered along its outer wall into the space between the rotor 8 and the stator 6, thereby increasing the air coverage area, reducing turbulence, and making the cooling more uniform. The design of the spiral blades 13 allows the air to flow in a spiral inside the casing 15, extending the time the air stays inside the motor, thereby more effectively removing heat. In addition, the spiral flow helps to reduce the possibility of local overheating.

[0064] The rapid circulation of air takes away the heat from the surfaces of the rotor 8 and the stator 6, especially when the air is guided by the spiral blades 13 and then flows from the outer surface of the stator 6, the temperature can be effectively reduced. Finally, the air is blown between the heat sinks 11 through the guide mechanism 3, taking away the heat from the surfaces of the heat sinks, and finally discharged to the outside of the casing 15. The design of the arc ring 33 further enhances the heat dissipation effect in this process, which can maintain the operating temperature of the motor at a low level, reduce the resistance loss caused by high temperature, improve the motor efficiency, and extend the service life of the insulating material and other key components. Good heat dissipation conditions can also reduce the wear of wearing parts such as the brush assembly 5 and the commutation copper sheet 10.

[0065] Embodiment 3: Based on the brush assembly 5 provided in Embodiment 1, this embodiment provides a further technical solution of the brush assembly 5.

[0066] The electrical installation ring 55 has fixed plates 50 symmetrically arranged inside, a controller 57 is arranged on one side of the two fixed plates 50, ink brushes 58 are slidably installed inside the two controllers 57, and a second spring 59 is arranged on one side of the two ink brushes 58, and the two ink brushes 58 are in contact with the reversing copper plate 10, two bimetallic strips 56 are symmetrically arranged on one side of the two fixed plates 50, a heat conductive sheet 511 is commonly arranged at one end of the two bimetallic strips 56, and one end of the two heat conductive sheets 511 is connected to the inner wall of the cover tube 51.

[0067] It is worth noting that the second spring 59 pushes the ink brush 58 to slide and contact the commutation copper plate 10. The ink brush 58 is energized by contact with the commutation copper plate 10. When the commutation copper plate 10 rotates along the central axis 2, heat will be generated when the commutation copper plate 10 and the ink brush 58 are in contact and friction. Through the long-term accumulation of heat, the heat energy will be transferred to the fixed plate 50 through the ink brush 58.

[0068] The brush assembly 5 includes a cover tube 51, which is fixedly mounted on one side of the cover 4. The outer surface of the cover tube 51 is provided with a plurality of slide grooves 52 distributed in a ring array, and a guide rod 53 is arranged inside the slide groove 52. An electrical installation ring 55 is slidably mounted on the outer surfaces of the plurality of guide rods 53 together, and a first spring 54 is arranged on the outer surfaces of the plurality of guide rods 53 and on one side of the electrical installation ring 55.

[0069] Among them, the heat energy of the fixed plate 50 will be transferred to the bimetallic strip 56, and the bimetallic strip 56 will be deformed by the heat transferred from the inside of the motor and the fixed plate 50, and the bimetallic strip 56 is set in a "C" shape. When the bimetallic strip 56 is heated and deformed, it will gradually straighten from the bent shape, and the deformed bimetallic strip 56 will push the electrical installation ring 55 to slide on the outer surface of the guide rod 53, and the sliding of the electrical installation ring 55 will drive the ink brush 58 to slide, thereby changing the contact position between the ink brush 58 and the commutation copper plate 10, preventing the surface temperature of the commutation copper plate 10 from overheating and too much carbon accumulation at the same position causing poor contact, and the set bimetallic strip 56 changes the contact position of the ink brush 58 and the commutation copper plate 10 with the temperature inside the motor, preventing the commutation copper plate 10 and the ink brush 58 from contacting at the same position for a long time, causing excessive wear of the commutation copper plate 10.

[0070] When the commutation copper sheet 10 and the ink brush 58 generate heat by friction, the heat energy is transferred to the bimetallic sheet 56 through the fixing sheet 50. Since the bimetallic sheet is very sensitive to temperature changes, it will deform according to the temperature increase, gradually straightening from a curved shape. As the bimetallic sheet 56 deforms, it pushes the electrical installation ring 55 to slide on the guide rod 53, thereby driving the ink brush 58 to slide, changing the contact position between it and the commutation copper sheet 10, avoiding local overheating and carbon deposition caused by long-term contact at the same position. By continuously adjusting the contact position of the ink brush 58, it can ensure that the heat on the surface of the commutation copper sheet 10 is more evenly distributed, reducing the formation of local hot spots, thereby reducing the risk of material aging or damage caused by high temperature.

[0071] Contact at different positions can help remove graphite deposits and other impurities on the surface of the commutation copper sheet 10, keep the contact surface clean, and reduce carbon deposition. Good contact quality reduces the possibility of arc discharge, reduces the occurrence rate of sparks, ensures stable current transmission, and improves the working efficiency of the motor.

[0072] The design of the bimetallic strip 56 enables the system to automatically adjust when the temperature changes to maintain the best contact state. The temperature-sensitive automatic adjustment mechanism of the bimetallic strip 56 can be flexibly adjusted according to the changes in the internal temperature of the motor and is suitable for different working conditions and load conditions.

[0073] This example also provides a method for using a high heat dissipation type DC permanent magnet synchronous servo motor, and the method of use is as follows:

[0074] S1. The commutation copper sheet 10 is electrically connected through the brush assembly 5, so that the rotor 8 drives the central shaft 2 to rotate, and the central shaft 2 will also drive the commutation copper sheet 10 to rotate. When the commutation copper sheet 10 rotates for a long time, more heat energy is generated between the brush assembly 5 and the commutation copper sheet 10 due to friction. When the temperature of the brush assembly 5 increases, the position of the electrical contact with the commutation copper sheet 10 will be changed, so as to prevent the problem of poor contact caused by graphite adsorption on the surface of the commutation copper sheet 10 due to the high temperature of the commutation copper sheet 10;

[0075] S2. When the central shaft 2 rotates, the fan guide mechanism 7 and the heat dissipation mechanism 9 will also be driven to rotate. The heat dissipation mechanism 9 rotates to draw out the air outside the guide mechanism 1 into between the rotor 8 and the stator 6, and the fan guide mechanism 7 draws the air between the rotor 8 and the stator 6 into the inside of the guide mechanism 1 as the central shaft 2 rotates;

[0076] S3. After the fan guide mechanism 7 guides the air into the interior of the guide mechanism 1, the guide mechanism 1 guides the air to be discharged from the outer surface of the stator 6. The flowing air takes away the heat on the surface of the stator 6 and is then guided and discharged through the guide mechanism 3, so that the air forms a cycle inside the guide mechanism 1 before being discharged.

[0077] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high heat dissipation type DC permanent magnet synchronous servo motor, comprising a central shaft (2) and a stator (6), a rotor (8) being arranged in the middle of the outer surface of the central shaft (2), and the stator (6) being sleeved on the outside of the rotor (8), a cover (4) being arranged on one side of the outer surface of the central shaft (2), and a commutation copper sheet (10) being arranged on the outer surface of the central shaft (2), characterized in that: A brush assembly (5) is provided on one side of the cover (4) and is sleeved on the outside of the commutation copper sheet (10) and adjusts the electrical contact position with the commutation copper sheet (10) according to the temperature of the motor; a fan guide mechanism (7) for extracting air between the rotor (8) and the stator (6) is provided on the outer surface of the central shaft (2) and between the rotor (8) and the commutation copper sheet (10); a heat dissipation mechanism (9) for extracting external air and sending it between the rotor (8) and the stator (6) is provided at one end of the central shaft (2); a guide mechanism (3) for guiding air to be discharged from the inside of the motor is provided on one side of the heat dissipation mechanism (9); and a flow guide mechanism (1) is provided between the guide mechanism (3) and the cover (4) and is fixed on the outer surface of the stator (6) and guides air flow to cool the stator (6); The flow guide mechanism (1) comprises a casing (15), the outer surface of the casing (15) is provided with a plurality of heat sinks (11) distributed in an annular array, one side of the outer surfaces of the plurality of heat sinks (11) is provided with an outer ring (14), the inner wall of the casing (15) is provided with a plurality of spiral blades (13) distributed in an annular array, one side of the casing (15) is provided with a sealing shell (12), the sealing shell (12) is fixedly mounted on one side of the sealing cover (4), and the plurality of spiral blades (13) are all provided on the outer surface of the stator (6); The brush assembly (5) comprises a cover tube (51), the cover tube (51) being fixedly mounted on one side of the cover (4), the outer surface of the cover tube (51) being provided with a plurality of slide grooves (52) distributed in a ring array, and the interior of the slide groove (52) being provided with a guide rod (53), the outer surfaces of the plurality of guide rods (53) being slidably mounted with an electrical appliance mounting ring (55), and the outer surfaces of the plurality of guide rods (53) and being located on one side of the electrical appliance mounting ring (55) being provided with a first spring (54); A fixing plate (50) is symmetrically arranged inside the electrical installation ring (55), a controller (57) is arranged on one side of the two fixing plates (50), an ink brush (58) is slidably installed inside the two controllers (57), a second spring (59) is arranged on one side of the two ink brushes (58), and the two ink brushes (58) are in contact with the reversing copper plate (10), two bimetallic plates (56) are symmetrically arranged on one side of the two fixing plates (50), a heat conducting plate (511) is commonly arranged at one end of the two bimetallic plates (56), and one end of the two heat conducting plates (511) is connected to the inner wall of the cover tube (51), and the two bimetallic plates (56) are deformed after being heated.

2. The high heat dissipation type DC permanent magnet synchronous servo motor according to claim 1, characterized in that: The fan guide mechanism (7) comprises an inner shell (71), wherein the inner shell (71) is fixedly mounted on the outer surface of the central shaft (2), and the outer surface of the inner shell (71) is provided with a plurality of rotating vanes (73) distributed in a ring array, and the inner walls of the plurality of rotating vanes (73) are commonly provided with guide ring pieces (72).

3. The high heat dissipation type DC permanent magnet synchronous servo motor according to claim 1, characterized in that: The heat dissipation mechanism (9) comprises a rear cover (95) and a cone shell (92); a bearing is provided on the inner wall of the rear cover (95), and the bearing sleeve is arranged outside the central axis (2); and a plurality of ventilation holes are provided on one side of the rear cover (95).

4. The high heat dissipation type DC permanent magnet synchronous servo motor according to claim 3, characterized in that: The cone shell (92) is fixedly mounted on the outer surface of the central shaft (2); the inner wall of the cone shell (92) is provided with a filter screen (96) for filtering air; the inner wall of the cone shell (92) is provided with a plurality of through holes (93) distributed in a ring array; the outer surface of the through holes (93) is provided with a plurality of rotating blades (94) distributed in a ring array; and a blocking ring (91) is commonly provided on one side of the plurality of rotating blades (94); the cone shell (92) is in the shape of a funnel.

5. The high heat dissipation type DC permanent magnet synchronous servo motor according to claim 1, characterized in that: The guide mechanism (3) comprises a collar (31), the collar (31) being fixedly mounted on one side of the rear cover (95) by means of bolts, an arc ring (33) being provided on one side of the collar (31), and the arc ring (33) being fixedly mounted on one side of the outer ring (14) by means of bolts, and the arc ring (33) being used to guide the internal airflow of the casing (15) to be discharged to the outside of the casing (15).

6. The high heat dissipation type DC permanent magnet synchronous servo motor according to claim 5, characterized in that: The inner wall of the collar (31) is provided with a plurality of leakage holes (34) distributed in a ring array, and a filter ring (32) for filtering air is provided between the collar (31) and the arc ring (33).

7. A method for using the high heat dissipation type DC permanent magnet synchronous servo motor according to any one of claims 1 to 6, characterized in that: The usage is as follows: S1. The commutation copper sheet (10) is electrically connected via the brush assembly (5), so that the rotor (8) drives the central shaft (2) to rotate, and the central shaft (2) also drives the commutation copper sheet (10) to rotate. When the commutation copper sheet (10) rotates for a long time, a large amount of heat energy is generated between the brush assembly (5) and the commutation copper sheet (10) due to friction. When the temperature of the brush assembly (5) rises, the position of the electrical contact with the commutation copper sheet (10) is changed, thereby preventing the problem of poor contact caused by graphite adsorption on the surface of the commutation copper sheet (10) due to the high temperature of the commutation copper sheet (10); S2. When the central shaft (2) rotates, the fan guide mechanism (7) and the heat dissipation mechanism (9) will also rotate. The heat dissipation mechanism (9) rotates to draw air from the outside of the guide mechanism (1) into between the rotor (8) and the stator (6). The fan guide mechanism (7) draws air from between the rotor (8) and the stator (6) into the inside of the guide mechanism (1) as the central shaft (2) rotates. S3. After the fan guide mechanism (7) guides the air into the interior of the flow guide mechanism (1), the flow guide mechanism (1) guides the air to be discharged from the outer surface of the stator (6). The flowing air takes away the heat on the surface of the stator (6) and is then guided to be discharged through the guide mechanism (3), so that the air forms a cycle inside the flow guide mechanism (1) before being discharged.

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