A permanent magnet integrated machine with internal heat dissipation structure

Abstract

The present invention is applicable to the technical field of permanent magnet integrated machine, and provides a permanent magnet integrated machine with an internal heat dissipation structure, including a front shell; heat dissipation ribs; a rear shell; a vent; a motor shaft; a heat sink fixed in the rear shell; heat sinks evenly installed on the heat sink; a bowl-shaped wind shield fixed on the side of the heat sink away from the heat sink; a fan shaft rotatably connected to the motor shaft; heat sink blades installed on one end of the heat sink located in the rear shell; a connecting shaft rotatably connected to the front shell and distributed parallel to the fan shaft; an adjusting gear pair connected to the fan shaft and the connecting shaft respectively; a thermal sensing drive mechanism for connecting the motor shaft and the connecting shaft is arranged in the front shell; the thermal sensing drive mechanism is driven by a transmission adjustment mechanism to automatically switch its operating state; the transmission adjustment mechanism is arranged in the motor shaft, and the transmission adjustment mechanism includes a second memory alloy member and a first memory alloy member; the present invention has a good heat dissipation effect.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet integrated machines, and in particular to a permanent magnet integrated machine with an internal heat dissipation structure. Background Art

[0002] The permanent magnet integrated machine is an integrated permanent magnet synchronous motor, and its heat sources mainly come from copper loss, iron loss, mechanical loss and additional loss. For the integrated permanent magnet synchronous motor, these factors will cause the temperature to rise, and because the integrated design is more compact, the heat dissipation is not as effective as the non-integrated design, which requires good thermal management and heat dissipation design to ensure that the motor does not overheat, thereby affecting performance or causing demagnetization of the permanent magnet.

[0003] In the prior art, most permanent magnet integrated machines use air-cooling fans to let in natural wind from the outside for cooling. This method has defects. The fan rotates synchronously with the motor output shaft, which increases the load on the one hand, and cannot automatically adjust the speed according to the internal temperature on the other hand, resulting in energy waste, untimely heat dissipation and other problems. Summary of the invention

[0004] The object of the present invention is to provide a permanent magnet integrated machine with an internal heat dissipation structure, aiming to solve the problems mentioned in the background technology.

[0005] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A permanent magnet integrated machine with an internal heat dissipation structure, comprising:

[0007] front shell;

[0008] The heat dissipation ribs are evenly fixed on the outer wall of the front shell;

[0009] A rear shell, fixed to the rear end of the front shell;

[0010] Ventilation openings are evenly arranged on the outer wall of the rear shell;

[0011] The motor shaft is rotatably arranged at the axis center of the front housing;

[0012] A heat sink is fixed in the rear shell and is located at a side of the vent away from the front shell;

[0013] The heat sink is evenly mounted on the heat sink and distributed in a circular pattern;

[0014] A bowl-shaped wind shield is fixed on a side of the heat sink away from the heat sink plate;

[0015] The fan shaft is rotatably connected to one end of the motor shaft close to the rear housing and is coaxially distributed;

[0016] A heat sink is installed on one end of the heat sink located inside the rear housing;

[0017] A connecting shaft, rotatably connected to the front housing and distributed parallel to the fan shaft;

[0018] The adjusting gear pair is connected with the fan shaft and the connecting shaft respectively;

[0019] A thermal drive mechanism for connecting the motor shaft and the connecting shaft is arranged in the front housing;

[0020] The thermal sensing driving mechanism is driven by the transmission adjustment mechanism to automatically switch its operating state;

[0021] The transmission adjustment mechanism is arranged in the motor shaft, and the transmission adjustment mechanism comprises a second memory alloy member having a first preset temperature range and a first memory alloy member having a second preset temperature range.

[0022] Preferably, the transmission adjustment mechanism comprises:

[0023] A connecting rod is slidably connected to the motor shaft, and the motor shaft is provided with a second sliding groove that cooperates with the connecting rod;

[0024] an annular plate, fixed on the connecting rod;

[0025] A first fixed internal gear is mounted on an end of the inner side of the annular plate away from the front shell;

[0026] A second fixed internal gear is mounted on the other end of the inner side of the annular plate;

[0027] A first movable external gear is mounted on one end of the connecting shaft located inside the motor shaft and cooperates with the first fixed internal gear;

[0028] The second movable external gear is mounted on the connecting shaft at one side of the first movable external gear and cooperates with the second fixed internal gear;

[0029] The net distance between the first fixed internal gear and the second fixed internal gear is greater than the maximum distance between the first moving external gear and the second moving external gear.

[0030] Preferably, the thermal drive mechanism further comprises:

[0031] A connecting slider is slidably disposed in the motor shaft, wherein the motor shaft is provided with a first slide groove matched therewith, and the first slide groove is connected with the second slide groove;

[0032] A driving slider is slidably matched with the first sliding groove and fixedly connected with the connecting rod, and the driving slider is located on a side of the connecting slider close to the rear shell;

[0033] A first limiting block is fixed in the second sliding groove and is used to limit the connecting rod;

[0034] A first elastic member, two ends of which are respectively connected to the inner wall of the first slide groove and a side of the connecting slide away from the driving slide;

[0035] The second elastic member has two ends respectively connected to the connecting slider and the driving slider;

[0036] One end of the second memory alloy member abuts against the surface of the driving slider;

[0037] One end of the first memory alloy member is fixed to the inner wall of the first slide groove away from the rear shell, and the other end is hinged to a sliding frame slidably connected to the connecting slider;

[0038] One end of the second memory alloy component is fixed on the connecting slider, and the other end of the second memory alloy component is abutted against the driving slider.

[0039] Preferably, a circumferentially evenly distributed flip dust shield mechanism is provided on the outer side of the heat sink, a dust shield fixing mechanism for fixing the flip dust shield mechanism is provided inside the heat sink, and the dust shield fixing mechanism is connected to the driving slider via a pneumatic driving mechanism.

[0040] Preferably, the flip dust shielding mechanism comprises:

[0041] A rotating shaft, rotatably disposed in the rear housing;

[0042] The arc-shaped flip dust shield is fixedly connected to the rotating shaft;

[0043] The third elastic member is respectively connected to one side of the arc-shaped flip dust shield member close to the inner wall of the rear shell and the heat dissipation plate.

[0044] Preferably, the dust blocking and fixing mechanism comprises:

[0045] A receiving groove is provided on the heat dissipation plate and cooperates with the arc-shaped flip dust shield;

[0046] A limiting slide groove is arranged in the heat dissipation plate and communicated with the containing groove;

[0047] A limiting slider, one end of which is away from the heat sink and is provided with an extrusion surface, and the limiting slider is slidably matched with the limiting sliding groove;

[0048] The fourth elastic member has two ends fixedly connected to an end of the limiting sliding block away from the extrusion surface and the inner wall of the limiting sliding groove respectively;

[0049] The second limiting block is fixed in the limiting sliding groove and abuts against an end of the limiting sliding block away from the extrusion surface.

[0050] The pneumatic drive mechanism comprises:

[0051] The ventilation cavity is arranged in the heat dissipation plate and is connected with an end of the limiting slide groove away from the containing groove;

[0052] The mounting sleeve is fixed on the heat dissipation plate and communicated with the middle of the ventilation cavity;

[0053] A connecting slide rod, one end of which passes through the axis of the fan shaft and the axis of the motor shaft and is fixedly connected to the driving slide block, and the other end of which is slidably connected to the mounting sleeve;

[0054] A connecting block is fixedly connected to one end of the connecting slide rod located in the installation sleeve and is slidably matched with the installation sleeve;

[0055] The one-way piston pressurizing assembly is connected to the connecting block to control the air pressure in the ventilation cavity.

[0056] Preferably, the one-way piston pressurizing assembly comprises:

[0057] A pull rope, one end of which is fixed to the connecting block;

[0058] The movable screw sleeve is slidably arranged in the installation sleeve;

[0059] The driving rod is rotatably disposed in the ventilation cavity and the mounting sleeve and is threadedly connected with the movable screw sleeve;

[0060] The piston plate slides in contact with the inner wall of the mounting sleeve and is threadedly connected with the driving rod;

[0061] The position where the driving rod is threadedly connected with the movable screw sleeve and the piston plate is a thread with opposite rotation directions.

[0062] Preferably, a filtering self-cleaning mechanism connected to the bowl-shaped wind shield is installed on the side of the heat sink away from the heat sink plate, and the filtering self-cleaning mechanism achieves self-cleaning through the displacement of the connecting slide rod.

[0063] Preferably, the filtering self-cleaning mechanism comprises:

[0064] Filter element;

[0065] The screw sleeve is rotated to be connected with the filter element in rotation and is threadedly connected with the connecting slide rod;

[0066] The dust scraping member is installed on the rotating screw sleeve and abuts against a side of the filter member close to the heat dissipation plate.

[0067] The above solution of the present invention includes at least the following beneficial effects:

[0068] When in use, if the temperature inside the front shell is high, the transmission adjustment mechanism generates a corresponding state change by sensing the ambient temperature. More specifically, when the temperature inside the front shell is within the safe temperature range, the second memory alloy component and the first memory alloy component remain unchanged; when the temperature inside the front shell rises from the safe temperature range to the first preset temperature range, the second memory alloy component deforms to drive the transmission adjustment mechanism to operate, so that it switches from an unconnected state to transmitting the power of the motor shaft to the connecting shaft in the form of a low transmission ratio, so that the connecting shaft rotates at a low speed, and the connecting shaft drives the fan shaft to rotate by adjusting the gear pair, and the fan shaft drives the heat dissipation blades to rotate, thereby generating wind pressure, and the external airflow enters the rear shell through the vents on the rear shell, passes through the heat sink and the bowl-shaped wind shield, and then passes through the rear shell and The gap between the front shell and the shell is discharged onto the heat dissipation ribs, thereby achieving the purpose of stable heat dissipation; and when the temperature of the front shell rises from the first preset temperature range to the second preset temperature range, the first memory alloy part is deformed on the basis of the second memory alloy part, thereby driving the transmission adjustment mechanism to switch the operating state, and transmitting the power of the motor shaft to the connecting shaft in the form of a high transmission ratio, so that the connecting shaft rotates at a high speed, and then the heat dissipation blades rotate at a high speed, thereby achieving the purpose of rapid heat dissipation. Through this setting, not only the sensitivity to temperature changes in the front shell can be improved, but also the installation of power parts to drive the state of the transmission adjustment mechanism can be avoided. In the low-speed state, not only the heat accumulation in the front shell can be avoided, which leads to the problem of gradual increase in internal temperature, but also the load on the motor can be reduced compared with the traditional permanent magnet integrated machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] Figure 1 A structural schematic diagram of a permanent magnet integrated machine with an internal heat dissipation structure provided in an embodiment of the present invention.

[0070] Figure 2 A schematic diagram of the structure of a permanent magnet integrated machine with an internal heat dissipation structure provided in an embodiment of the present invention.

[0071] Figure 3 for Figure 2 Schematic diagram of the structure at point A.

[0072] Figure 4 for Figure 2 Schematic diagram of the structure at point B.

[0073] Figure 5 A schematic structural diagram of a first movable external gear in a permanent magnet integrated machine with an internal heat dissipation structure provided in an embodiment of the present invention.

[0074] Figure 6 A schematic diagram of changes of a first memory alloy component and a second memory alloy component in a permanent magnet integrated machine with an internal heat dissipation structure provided by an embodiment of the present invention.

[0075] Figure 7 for Figure 2 Schematic diagram of the structure at C.

[0076] Figure 8 for Figure 2 Schematic diagram of the structure at D.

[0077] Fig. 9 for Figure 2 Schematic diagram of the structure at E.

[0078] Fig.10 for Figure 2 Schematic diagram of the structure at F.

[0079] In the attached drawings: 1-front shell; 2-heat dissipation ribs; 3-rear shell; 4-vent; 5-motor shaft; 6-heat dissipation plate; 7-heat sink; 8-bowl-shaped wind shield; 9-fan shaft; 10-heat dissipation blades; 11-connecting shaft; 12-adjusting gear pair; 13-connecting rod; 14-annular plate; 15-first fixed inner gear; 16-second fixed inner gear; 17-first movable outer gear; 18-second movable outer gear; 19-gear plate; 20-meshing teeth; 21-conical guide; 22-connecting slider; 23-first memory alloy member; 24-second memory alloy member; 25-driving slider; 26-first limit block; 27-first elastic member; 28-second elastic member; 29-first slider slot; 30-second slide slot; 31-rotating shaft; 32-wedge-shaped mounting member; 33-arc baffle; 34-inclined surface; 35-third elastic member; 36-accommodating slot; 37-limiting slide slot; 38-limiting slider; 39-fourth elastic member; 40-second limiting block; 41-ventilation cavity; 42-mounting sleeve; 43-connecting slide rod; 44-connecting block; 45-pull rope; 46-movable screw sleeve; 47-driving rod; 48-piston plate; 49-filter element; 50-rotating screw sleeve; 51-dust scraper; 100-transmission adjustment mechanism; 200-thermal drive mechanism; 300-flip dust shield mechanism; 400-dust shield fixing mechanism; 500-air pressure drive mechanism; 600-filter self-cleaning mechanism. DETAILED DESCRIPTION

[0080] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0081] like Figure 1 , Figure 2 FIG. 1 is a schematic diagram of a permanent magnet integrated machine with an internal heat dissipation structure provided by an embodiment of the present invention, comprising:

[0082] Front shell 1;

[0083] The heat dissipation ribs 2 are evenly fixed on the outer wall of the front shell 1;

[0084] The rear shell 3 is fixed to the rear end of the front shell 1;

[0085] The vents 4 are evenly arranged on the outer wall of the rear shell 3;

[0086] The motor shaft 5 is rotatably arranged at the axis center of the front housing 1;

[0087] The heat sink 6 is fixed in the rear housing 3 and is located on a side of the vent 4 away from the front housing 1;

[0088] The heat sink 7 is evenly mounted on the heat sink 6 and distributed in a circular pattern;

[0089] A bowl-shaped wind shield 8 is fixed on a side of the heat sink 7 away from the heat sink 6;

[0090] The fan shaft 9 is rotatably connected to one end of the motor shaft 5 close to the rear housing 3 and is coaxially distributed;

[0091] The heat dissipation blade 10 is installed on one end of the heat dissipation blade 10 located inside the rear housing 3;

[0092] A connecting shaft 11 is rotatably connected to the front housing 1 and is distributed parallel to the fan shaft 9;

[0093] The adjusting gear pair 12 is connected to the fan shaft 9 and the connecting shaft 11 respectively;

[0094] The front housing 1 is provided with a thermal drive mechanism 200 for connecting the motor shaft 5 and the connecting shaft 11;

[0095] The thermal drive mechanism 200 is driven by the transmission adjustment mechanism 100 to automatically switch its operating state;

[0096] The transmission adjustment mechanism 100 is disposed in the motor shaft 5 , and includes a second memory alloy member 24 with a first preset temperature range and a first memory alloy member 23 with a second preset temperature range, and generates corresponding deformation by sensing the ambient temperature.

[0097] In the embodiment of the present invention, when in use, if the temperature inside the front shell 1 is high, the transmission adjustment mechanism 100 generates a corresponding state change by sensing the ambient temperature. More specifically, when the temperature inside the front shell 1 is within the safe temperature range, the second memory alloy member 24 and the first memory alloy member 23 do not change; when the temperature inside the front shell 1 rises from the safe temperature range to the first preset temperature range, the second memory alloy member 24 deforms to drive the transmission adjustment mechanism 100 to operate, so that it switches from an unconnected state to transmitting the power of the motor shaft 5 to the connecting shaft 11 in the form of a low transmission ratio, so that the connecting shaft 11 rotates at a low speed, and the connecting shaft 11 drives the fan shaft 9 to rotate by adjusting the gear pair 12, and the fan shaft 9 drives the heat dissipation blades 10 to rotate, thereby generating wind pressure, and the external airflow enters the rear shell 3 through the vent 4 on the rear shell 3, and passes through the heat sink 7 and the bowl-shaped wind shield. 8, and then discharged into the heat dissipation ribs 2 through the gap between the rear shell 3 and the front shell 1, so as to achieve the purpose of stable heat dissipation; when the temperature of the front shell 1 rises from the first preset temperature range to the second preset temperature range, the first memory alloy part 23 is deformed on the basis of the second memory alloy part 24, thereby driving the transmission adjustment mechanism 100 to switch the operating state, and transmitting the power of the motor shaft 5 to the connecting shaft 11 in the form of a high transmission ratio, so that the connecting shaft 11 rotates at a high speed, and then the heat dissipation blades 10 rotate at a high speed, so as to achieve the purpose of rapid heat dissipation. Through this setting, not only the sensitivity to the temperature change in the front shell 1 can be improved, but also the installation of power parts to drive the state of the transmission adjustment mechanism 100 can be avoided. In the low-speed state, not only the heat accumulation in the front shell 1 can be avoided, which leads to the problem of gradual increase in the internal temperature, but also the load on the motor can be reduced compared with the traditional permanent magnet integrated machine.

[0098] like Figure 3 , Figure 4 As shown, as a preferred embodiment of the present invention, the transmission adjustment mechanism 100 includes:

[0099] The connecting rod 13 is slidably connected to the motor shaft 5, and the motor shaft 5 is provided with a second sliding groove 30 that cooperates with the connecting rod 13;

[0100] The annular plate 14 is fixed on the connecting rod 13;

[0101] A first fixed internal gear 15 is mounted on an end of the inner side of the annular plate 14 away from the front housing 1;

[0102] A second fixed internal gear 16 is mounted on the other end of the inner side of the annular plate 14;

[0103] The first movable external gear 17 is mounted on one end of the connecting shaft 11 located inside the motor shaft 5 and cooperates with the first fixed internal gear 15;

[0104] The second movable external gear 18 is mounted on the connecting shaft 11 on one side of the first movable external gear 17 and cooperates with the second fixed internal gear 16;

[0105] The clearance distance between the first fixed internal gear 15 and the second fixed internal gear 16 is greater than the maximum distance between the first moving external gear 17 and the second moving external gear 18 .

[0106] In the embodiment of the present invention, when the temperature in the front shell 1 is within the safe temperature range, the second memory alloy 24 and the first memory alloy 23 are unchanged, the first movable external gear 17 and the second movable external gear 18 are both located between the first fixed internal gear 15 and the second fixed internal gear 16, and no transmission-related contact is generated at this time; when the temperature in the front shell 1 rises from the safe temperature range to the first preset temperature range, the second memory alloy 24 is deformed, thereby driving the connecting rod 13 to move toward the connecting shaft 11, the connecting rod 13 drives the annular plate 14 to move, and the annular plate 14 drives the first fixed internal gear 15 and the second fixed internal gear 16 to move until the second fixed internal gear 16 is meshed with the second movable external gear 18, at which time the transmission ratio is low-speed transmission, and the second movable external gear 18 is meshed with the second fixed internal gear 16. The wheel 18 drives the connecting shaft 11 to rotate, and the connecting shaft 11 drives the fan shaft 9 to rotate by adjusting the gear pair 12. The fan shaft 9 drives the heat dissipation blades 10 to rotate at a low speed, and the heat dissipation blades 10 dissipate heat. This arrangement can not only avoid heat accumulation and the problem of gradual increase in the internal temperature of the motor, but also reduce the load on the motor compared to the traditional permanent magnet integrated machine; and when the temperature of the front shell 1 rises from the first preset temperature range to the second preset temperature range, the first memory alloy part 23 is deformed on the basis of the second memory alloy part 24, thereby driving the connecting rod 13 and the annular plate 14 to move in a direction away from the connecting shaft 11 until the first movable outer gear 17 is meshed with the first fixed inner gear 15. At this time, the transmission ratio is a high transmission, and the heat dissipation blades 10 can achieve the purpose of rapid heat dissipation.

[0107] like Figure 5 As shown, in one case of this embodiment, the first movable external gear 17 and the second movable external gear 18 have the same structure, and the first movable external gear 17 includes:

[0108] The gear plate 19 is provided with a mounting hole;

[0109] The meshing teeth 20 are evenly mounted on the outer wall of the gear plate 19;

[0110] The conical guide member 21 is evenly installed on one side of the meshing teeth 20 for guiding.

[0111] Specifically, since the annular plate 14 may cause a rigid collision with the first movable external gear 17 or the second fixed internal gear 16 when driving the first fixed internal gear 15 and the second fixed internal gear 16 to move, a conical guide 21 is provided on one side of the first movable external gear 17 to provide guidance and avoid the problem of rigid collision. Specifically, when the conical guide 21 on the first movable external gear 17 contacts the end face of the first fixed internal gear 15, the conical guide 21 drives the meshing teeth 20 and the gear plate 19 to rotate automatically through the smooth surface of the conical guide 21, thereby being inserted between adjacent teeth of the first fixed internal gear 15 and avoiding rigid collision.

[0112] Please note that here the first movable external gear 17 and the second movable external gear 18 are both installed by means of a shoulder, a slot and an elastic retaining ring, so the first movable external gear 17 and the second movable external gear 18 have a preset buffer distance in the axial direction of the connecting shaft 11.

[0113] like Figure 4 , Figure 6 As shown, as another preferred embodiment of the present invention, the thermal drive mechanism 200 further includes:

[0114] The connecting slider 22 is slidably disposed in the motor shaft 5. The motor shaft 5 is provided with a first slide groove 29 that matches with the motor shaft 5. The first slide groove 29 is connected with the second slide groove 30.

[0115] The driving slider 25 is slidably matched with the first sliding groove 29 and is fixedly connected to the connecting rod 13. The driving slider 25 is located on a side of the connecting slider 22 close to the rear housing 3;

[0116] A first limiting block 26 is fixed in the second sliding groove 30 and is used to limit the connecting rod 13;

[0117] The first elastic member 27 has two ends respectively connected to the inner wall of the first slide groove 29 and a side of the connecting slider 22 away from the driving slider 25;

[0118] The second elastic member 28 has two ends connected to the connecting slider 22 and the driving slider 25 respectively;

[0119] One end of the second memory alloy member 24 abuts against the surface of the driving slider 25;

[0120] One end of the first memory alloy member 23 is fixed to the inner wall of the first slide slot 29 away from the rear housing 3, and the other end is hinged to a sliding frame (not shown in the figure) slidably connected to the connecting slider 22;

[0121] One end of the second memory alloy member 24 is fixed on the connecting slider 22 , and the other end of the second memory alloy member 24 abuts against the driving slider 25 .

[0122] In the embodiment of the present invention, when the temperature in the front shell 1 is within the safe temperature range, the second memory alloy 24 and the first memory alloy 23 do not change, the driving slider 25 and the connecting rod 13 are both at the initial position, the first movable external gear 17 and the second movable external gear 18 are both between the first fixed internal gear 15 and the second fixed internal gear 16, and no transmission-related contact is generated at this time; when the temperature in the front shell 1 rises from the safe temperature range to the first preset temperature range, the second memory alloy 24 is deformed, thereby changing from a bending deformation state to a vertical state, and the force of the second memory alloy 24 is greater than the pulling force of the second elastic member 28, thereby driving the driving slider 25 and the connecting rod 13 to move toward the connecting shaft 11, the connecting rod 13 drives the annular plate 14 to move, and the annular plate 14 drives the first fixed internal gear 15 and the second fixed internal gear 16 to move until the second fixed internal gear 16 is meshed with the second movable external gear 18, at which time the transmission ratio is low-speed transmission, the second movable external gear 18 drives the connecting shaft 11 to rotate, and the connecting shaft 11 drives the fan shaft through the adjusting gear pair 12 9 rotates, the fan shaft 9 drives the heat dissipation blades 10 to rotate at a low speed, and the heat dissipation blades 10 dissipate heat. This setting can not only avoid the problem of heat accumulation causing the internal part of the motor to gradually rise, but also reduce the load on the motor compared with the traditional permanent magnet integrated machine; and when the temperature of the front shell 1 rises from the first preset temperature range to the second preset temperature range, the first memory alloy member 23 is deformed on the basis of the second memory alloy member 24, and the first memory alloy member 23 changes from a vertical state to a bent state. The force of the first memory alloy member 23 is greater than the elastic force of the first elastic member 27, so the bent end of the first memory alloy member 23 drives the sliding frame to move, the sliding frame drives the connecting slider 22 to move, the connecting slider 22 drives the second elastic member 28 and the second memory alloy member 24 to move, and the second elastic member 28 drives the driving slider 25 to move, and the driving slider 25 drives the connecting rod 13 and the annular plate 14 to move in a direction away from the connecting shaft 11 until the first movable outer gear 17 is meshed with the first fixed inner gear 15. At this time, the transmission ratio is a high transmission, and the heat dissipation blade 10 can achieve the purpose of rapid heat dissipation.

[0123] like Figure 6 As shown, for example, the memory temperature range of the second memory alloy 24 is 100-400°, while the memory temperature range of the first memory alloy 23 is 200-400°, so that when the temperature rises to 100°, the deformation of the second memory alloy 24 is first triggered, reaching the first preset distance to the right, so that the second fixed internal gear 16 and the second movable external gear 18 are meshed; if the temperature rises to 200° subsequently, the deformation of the first memory alloy 23 is triggered based on the deformation of the second memory alloy 24, reaching the second preset distance to the left, and the second preset distance is greater than the first preset distance, so that the first movable external gear 17 and the first fixed internal gear 15 are meshed.

[0124] like Figure 1 , Figure 7 , Figure 8 , Fig. 9 As shown, as another preferred embodiment of the present invention, a circumferentially evenly distributed flip dust shield mechanism 300 is provided on the outer side of the heat sink 7, and a dust shield fixing mechanism 400 for fixing the flip dust shield mechanism 300 is provided inside the heat sink 6, and the dust shield fixing mechanism 400 is connected to the driving slider 25 via a pneumatic driving mechanism 500.

[0125] In an embodiment of the present invention, when in use and at a safe temperature, the flip dust shield mechanism 300 is in a dust shielding state, and when switched to a low-speed heat dissipation state of the fan shaft 9, wind pressure is generated, and at this time the flip dust shield mechanism 300 is not completely flipped, thereby allowing ventilation; when switched to a high-speed heat dissipation state of the fan shaft 9, the flip dust shield mechanism 300 is completely flipped, and at the same time, the driving slider 25 drives the dust shield fixing mechanism 400 to operate through the air pressure driving mechanism 500, thereby fixing the flip dust shield mechanism 300 and maintaining a stable full ventilation state to achieve the purpose of rapid heat dissipation; when the fan shaft 9 is switched to a state where it is not in a high-speed heat dissipation state, the dust shield fixing mechanism 400 stops running, and the natural elastic force of the flip dust shield mechanism 300 is used to reset the operation.

[0126] like Figure 7 As shown, as another preferred embodiment of the present invention, the flip dust shielding mechanism 300 includes:

[0127] A rotating shaft 31 is rotatably disposed in the rear housing 3;

[0128] The arc-shaped flip dust shield is fixedly connected to the rotating shaft 31;

[0129] The third elastic member 35 is connected to one side of the arc-shaped flip dust shield close to the inner wall of the rear housing 3 and the heat dissipation plate 6 respectively.

[0130] In the embodiment of the present invention, when in use, the wedge-shaped mounting member 32 is limited by the elastic force of the third elastic member 35. When the fan shaft 9 rotates, the heat dissipation blades 10 rotate to generate wind pressure. The suction force generated by the wind pressure causes the arc-shaped flip dust shield to flip toward the middle side of the rear shell 3, so that the external airflow can enter the interior of the motor and flow away the heat.

[0131] In one case of this embodiment, the arc-shaped flip dust shield comprises:

[0132] The wedge-shaped mounting member 32 has an inclined surface 34 on one side away from the inner wall of the rear housing 3;

[0133] The arc-shaped baffle 33 is fixedly connected to one end of the wedge-shaped mounting member 32 away from the heat sink 6 .

[0134] Specifically, by providing the inclined surface 34 on the wedge-shaped mounting member 32 , the arc-shaped baffle 33 can be easily flipped to a position parallel to the heat sink 6 , thereby avoiding interference with the heat sink 6 .

[0135] like Figure 8 As shown, as another preferred embodiment of the present invention, the dust blocking fixing mechanism 400 includes:

[0136] The receiving groove 36 is provided on the heat dissipation plate 6 and cooperates with the arc-shaped flip dust shield;

[0137] A limiting slide groove 37 is disposed in the heat dissipation plate 6 and communicated with the receiving groove 36;

[0138] The limiting slider 38 has an extrusion surface at one end away from the heat sink 6, and the limiting slider 38 is slidably matched with the limiting slide groove 37;

[0139] The fourth elastic member 39 has two ends fixedly connected to one end of the limiting sliding block 38 away from the extrusion surface and the inner wall of the limiting sliding groove 37 respectively;

[0140] The second limiting block 40 is fixed in the limiting sliding groove 37 and abuts against an end of the limiting sliding block 38 away from the extrusion surface.

[0141] In an embodiment of the present invention, when the first memory alloy component 23 is displaced, the pneumatic drive mechanism 500 drives the limit slider 38 to move through the pneumatic drive, thereby driving the limit slider 38 to slide stably along the limit slider groove 37 toward the accommodating groove 36. The limit slider 38 stretches the fourth elastic component 39, and the limit slider 38 slides to the maximum distance along the limit slider groove 37. At this time, the limit slider 38 is provided with an end of the extrusion surface extending into the accommodating groove 36, so that the arc-shaped flip dust stopper can be extruded and moved on its extrusion surface, so that the arc-shaped flip dust stopper is received in the accommodating groove 36, and then the end surface away from the extrusion surface is used to limit and fix the arc-shaped flip dust stopper.

[0142] like Fig. 9 As shown, as another preferred embodiment of the present invention, the pneumatic drive mechanism 500 includes:

[0143] The ventilation cavity 41 is disposed in the heat dissipation plate 6 and communicates with an end of the limiting sliding groove 37 away from the receiving groove 36;

[0144] The mounting sleeve 42 is fixed on the heat dissipation plate 6 and communicated with the middle of the ventilation cavity 41;

[0145] A connecting slide rod 43, one end of which passes through the axis of the fan shaft 9 and the axis of the motor shaft 5 and is fixedly connected to the driving slide block 25, and the other end of which is slidably connected to the mounting sleeve 42;

[0146] The connecting block 44 is fixedly connected to one end of the connecting slide rod 43 located in the mounting sleeve 42 and is slidably matched with the mounting sleeve 42;

[0147] The one-way piston pressurizing assembly is connected to the connecting block 44 to control the air pressure in the ventilation cavity 41 .

[0148] In the embodiment of the present invention, when in use, when the second memory alloy component 24 is deformed to drive the driving slider 25 to move, the driving slider 25 drives the connecting slide rod 43 to move. At this time, the connecting slide rod 43 slides along the mounting sleeve 42 and does not trigger the one-way piston pressurizing assembly; when the first memory alloy component 23 is deformed on the basis of the second memory alloy component 24, it drives the driving slider 25 to move toward the front shell 1; on the one hand, the driving slider 25 drives the connecting rod 13 and the annular plate 14 to move in the direction away from the connecting shaft 11, and the annular plate 14 drives the first fixed internal gear 15 to move until the first movable external gear 17 is meshed with the first fixed internal gear 15, and the first movable external gear 17 is meshed with the first fixed internal gear 15. A movable external gear 17 drives the connecting shaft 11 to rotate, and the connecting shaft 11 drives the fan shaft 9 to rotate by adjusting the gear pair 12, and the fan shaft 9 drives the heat dissipation blades 10 to rotate. The heat dissipation blades 10 generate wind pressure, thereby driving the arc-shaped flip dust shield to flip until it fits with the accommodating groove 36 and is thus accommodated; on the other hand, the driving slider 25 drives the connecting slide rod 43 to move, and the connecting slide rod 43 moves to the initial position and continues to move, thereby triggering the one-way piston pressurizing assembly, and the one-way piston pressurizing assembly gradually squeezes into the ventilation cavity 41. Since the ventilation cavity 41 and the limiting slide groove 37 are connected, the limiting slider 38 is pushed to limit and fix the arc-shaped flip dust shield.

[0149] Note that since the above two processes are carried out simultaneously, there is a situation where the limit slider 38 first extends into the accommodating groove 36. At this time, the force of the arc-shaped flip dust shield flipping is greater than the force driving the limit slider 38 to move in the ventilation cavity 41. Therefore, the arc-shaped flip dust shield squeezes the extrusion surface of the limit slider 38, thereby causing the limit slider 38 to move into the limit slot 37. Subsequently, it is pushed back to its original position by air pressure to limit and block the arc-shaped flip dust shield.

[0150] In one aspect of this embodiment, the one-way piston pressurizing assembly includes:

[0151] A pull rope 45, one end of which is fixed to the connecting block 44;

[0152] The movable screw sleeve 46 is slidably disposed in the mounting sleeve 42;

[0153] The driving rod 47 is rotatably disposed in the ventilation cavity 41 and the mounting sleeve 42 and is threadedly connected with the movable screw sleeve 46;

[0154] The piston plate 48 slides in contact with the inner wall of the mounting sleeve 42 and is threadedly connected to the driving rod 47;

[0155] The position where the driving rod 47 is threadedly connected to the movable screw sleeve 46 and the piston plate 48 is a thread with opposite rotation directions.

[0156] Specifically, in the initial state, the pull rope 45 is in a stretched state. When the connecting block 44 moves toward the heat sink 6, the pull rope 45 is relaxed, so the movable screw sleeve 46 does not move. When the connecting block 44 moves toward the front shell 1, it first moves to the initial position, thereby straightening the pull rope 45, and then pulls the pull rope 45 to move. The pull rope 45 drives the movable screw sleeve 46 to move, and the movable screw sleeve 46 drives the driving rod 47 to rotate. The driving rod 47 drives the piston plate 48 to move in the opposite direction of the movable screw sleeve 46, that is, toward the ventilation chamber 41. The piston plate 48 squeezes the gas in the ventilation chamber 41, thereby using air pressure to drive the limit slider 38 to move.

[0157] like Fig.10 As shown, as another preferred embodiment of the present invention, a filtering self-cleaning mechanism 600 connected to the bowl-shaped wind shield 8 is installed on the side of the heat sink 7 away from the heat sink 6, and the filtering self-cleaning mechanism 600 realizes self-cleaning by the displacement of the connecting slide rod 43, and the filtering self-cleaning mechanism 600 includes:

[0158] Filter element 49;

[0159] The screw sleeve 50 is rotated to be connected with the filter element 49 and is threadedly connected with the connecting slide rod 43;

[0160] The scraper 51 is mounted on the rotating screw sleeve 50 and abuts against a side of the filter 49 close to the heat dissipation plate 6 .

[0161] In the embodiment of the present invention, when the connecting slide rod 43 moves, the connecting slide rod 43 drives the rotating screw sleeve 50 to rotate, and the rotating screw sleeve 50 drives the dust scraper 51 to rotate, so that the dust scraper 51 scrapes off the dust on the surface of the filter element 49, thereby increasing its service life. The scraped dust falls downward under the action of gravity, and then falls on the arc-shaped flip dust shield. After the arc-shaped flip dust shield is flipped, the dust is automatically discharged from the gap between the arc-shaped flip dust shield and the heat sink 6.

[0162] The above embodiment of the present invention provides a permanent magnet integrated machine with an internal heat dissipation structure, which achieves the following technical effects:

[0163] First, when in use, when the temperature in the front shell 1 is within the safe temperature range, the second memory alloy 24 and the first memory alloy 23 do not change by sensing the temperature, so the driving slider 25 and the connecting rod 13 are both in the initial position, and the first movable outer gear 17 and the second movable outer gear 18 are both between the first fixed inner gear 15 and the second fixed inner gear 16, and the two sets of matching gears do not have transmission-related contact; at the same time, under the action of the third elastic member 35, the arc-shaped flip dust shield is in a dust shielding state;

[0164] When the temperature in the front shell 1 rises from the safe temperature range to the first preset temperature range, the second memory alloy member 24 is deformed, and the second memory alloy member 24 overcomes the pulling force of the second elastic member 28, thereby changing from a deformed bent state to a vertical state, thereby driving the driving slider 25 and the connecting rod 13 to move toward the direction of the connecting shaft 11, and the connecting rod 13 drives the annular plate 14 to move, and the annular plate 14 drives the first fixed internal gear 15 and the second fixed internal gear 16 to move until the second fixed internal gear 16 is meshed with the second movable external gear 18. At this time, the transmission ratio between the second fixed internal gear 16 and the second movable external gear 18 is a low transmission ratio, and the second movable external gear 18 drives the connecting shaft 11 to rotate, and the connecting shaft 11 drives the fan shaft 9 to rotate through the adjusting gear pair 12, and the fan shaft 9 drives The heat dissipation blades 10 rotate at a low speed, thereby generating wind pressure, driving the arc-shaped flip dust shield to not completely flip, and the external airflow enters the rear shell 3 through the vents 4 on the rear shell 3, and passes through the heat sink 7 and the bowl-shaped wind shield 8, and then is discharged into the heat dissipation ribs 2 through the gap between the rear shell 3 and the front shell 1, thereby achieving the purpose of stable heat dissipation. This arrangement can not only avoid heat accumulation and the problem of gradual increase in the motor interior, but also reduce the load on the motor compared to the traditional permanent magnet integrated machine; at the same time, the driving slider 25 synchronously drives the connecting slider 43 to move, and at this time the connecting slider 43 slides along the mounting sleeve 42, and the connecting slider 43 drives the connecting block 44 to move toward the heat dissipation plate 6, and the pull rope 45 changes from a stretched state to a relaxed state, so the movable screw sleeve 46 does not move;

[0165] When the temperature of the front shell 1 rises from the first preset temperature range to the second preset temperature range, the first memory alloy 23 is deformed on the basis of the second memory alloy 24, and the first memory alloy 23 overcomes the elastic force of the first elastic member 27, and the first memory alloy 23 changes from a vertical state to a bent state. Therefore, the bent end of the first memory alloy 23 drives the sliding frame to move, the sliding frame drives the connecting slider 22 to move, the connecting slider 22 drives the second elastic member 28 and the second memory alloy 24 to move, the second elastic member 28 drives the driving slider 25 to move, and the driving slider 25 drives the connecting rod 13 and the annular plate 14 to move in a direction away from the connecting shaft 11 until the first movable external gear 17 is meshed with the first fixed internal gear 15. At this time, the transmission ratio between the first movable external gear 17 and the first fixed internal gear 15 is a high transmission ratio, and the second movable external gear 18 drives the connecting shaft 11 rotates, the connecting shaft 11 drives the fan shaft 9 to rotate by adjusting the gear pair 12, and the fan shaft 9 drives the heat dissipation blades 10 to rotate at a high speed, and the heat dissipation blades 10 generate wind pressure, thereby driving the arc-shaped flip dust shield to flip until it fits with the accommodating groove 36 and is accommodated; at the same time, the driving slider 25 drives the connecting slider 43 to move in the direction close to the front shell 1, and the connecting slider 43 drives the connecting block 44 to move, and the connecting block 44 first moves to the initial position, thereby straightening the pull rope 45, and then pulling the pull rope 45 to move, and the pull rope 45 drives the moving screw sleeve 46 to move, and the moving screw sleeve 46 drives the driving rod 47 to rotate, and the driving rod 47 drives the piston plate 48 to move in the opposite direction of the moving screw sleeve 46, that is, to move toward the ventilation chamber 41, and the piston plate 48 squeezes the gas in the ventilation chamber 41, thereby using the air pressure to drive the limit slider 38 to move, and the arc-shaped flip dust shield is limited and fixed by the limit slider 38;

[0166] Since the arc-shaped flip dust shield flips and the limit slider 38 moves synchronously, there is a situation where the limit slider 38 first extends into the accommodating groove 36. At this time, the flipping force of the arc-shaped flip dust shield is greater than the force in the ventilation cavity 41 that drives the limit slider 38 to move. Therefore, the arc-shaped flip dust shield squeezes the extrusion surface of the limit slider 38, so that the limit slider 38 moves into the limit slot 37. Subsequently, the air pressure is used to push it back to its original position, and the arc-shaped flip dust shield is limited and fixed, which can also achieve the same effect.

[0167] When the heat in the front shell 1 gradually dissipates, the temperature drops, so that it can be reset by the reverse process to facilitate the next use. The present invention can not only improve the sensitivity to the temperature change in the front shell 1, but also avoid the installation of power parts to drive the state of the transmission adjustment mechanism 100, thereby greatly reducing the overall weight and volume of the motor. In the low-speed state, it can not only avoid the accumulation of heat in the front shell 1, causing the internal temperature to gradually increase, but also reduce the load on the motor compared to the traditional permanent magnet integrated machine, and can quickly dissipate heat in the high-speed state, avoiding the problem of maintaining the same speed as the motor shaft 5 in traditional equipment and being unable to flexibly adjust.

[0168] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in the field of permanent magnet integrated machine technology, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A permanent magnet integrated machine with an internal heat dissipation structure, characterized in that: include: front shell; The heat dissipation ribs are evenly fixed on the outer wall of the front shell; A rear shell, fixed to the rear end of the front shell; Ventilation openings are evenly arranged on the outer wall of the rear shell; The motor shaft is rotatably arranged at the axis center of the front housing; A heat sink is fixed in the rear shell and is located at a side of the vent away from the front shell; The heat sink is evenly mounted on the heat sink and distributed in a circular pattern; A bowl-shaped wind shield is fixed on a side of the heat sink away from the heat sink plate; The fan shaft is rotatably connected to one end of the motor shaft close to the rear housing and is coaxially distributed; A heat sink is installed on one end of the heat sink located inside the rear housing; A connecting shaft, rotatably connected to the front housing and distributed parallel to the fan shaft; The adjusting gear pair is connected with the fan shaft and the connecting shaft respectively; A thermal drive mechanism for connecting the motor shaft and the connecting shaft is arranged in the front housing; The thermal sensing driving mechanism is driven by the transmission adjustment mechanism to automatically switch its operating state; The transmission adjustment mechanism is arranged in the motor shaft, and the transmission adjustment mechanism comprises a second memory alloy member having a first preset temperature range and a first memory alloy member having a second preset temperature range; The transmission adjustment mechanism comprises: A connecting rod is slidably connected to the motor shaft, and the motor shaft is provided with a second sliding groove that cooperates with the connecting rod; An annular plate, fixed on the connecting rod; A first fixed internal gear is mounted on an end of the inner side of the annular plate away from the front shell; A second fixed internal gear is mounted on the other end of the inner side of the annular plate; A first movable external gear is mounted on one end of the connecting shaft located inside the motor shaft and cooperates with the first fixed internal gear; The second movable external gear is mounted on the connecting shaft at one side of the first movable external gear and cooperates with the second fixed internal gear; The net distance between the first fixed internal gear and the second fixed internal gear is greater than the maximum distance between the first movable external gear and the second movable external gear; The thermal drive mechanism also includes: A connecting slider is slidably disposed in the motor shaft, wherein the motor shaft is provided with a first slide groove matched therewith, and the first slide groove is connected with the second slide groove; A driving slider is slidably matched with the first sliding groove and fixedly connected with the connecting rod, and the driving slider is located on a side of the connecting slider close to the rear shell; A first limiting block, fixed in the second sliding groove, for limiting the connection rod; A first elastic member, two ends of which are respectively connected to the inner wall of the first slide groove and a side of the connecting slide away from the driving slide; The second elastic member has two ends respectively connected to the connecting slider and the driving slider; One end of the second memory alloy member abuts against the surface of the driving slider; One end of the first memory alloy member is fixed to the inner wall of the first slide groove away from the rear shell, and the other end is hinged to a sliding frame slidably connected to the connecting slider; One end of the second memory alloy component is fixed on the connecting slider, and the other end of the second memory alloy component is abutted against the driving slider.

2. The permanent magnet integrated machine with internal heat dissipation structure according to claim 1, characterized in that: The outer side of the heat sink is provided with a circumferentially evenly distributed flip dust shield mechanism, and the heat sink is provided with a dust shield fixing mechanism for fixing the flip dust shield mechanism, and the dust shield fixing mechanism is connected to the driving slider through a pneumatic driving mechanism.

3. The permanent magnet integrated machine with internal heat dissipation structure according to claim 2, characterized in that: The flip dust shielding mechanism comprises: A rotating shaft, rotatably disposed in the rear housing; The arc-shaped flip dust shield is fixedly connected to the rotating shaft; The third elastic member is respectively connected to one side of the arc-shaped flip dust shield member close to the inner wall of the rear shell and the heat dissipation plate.

4. The permanent magnet integrated machine with internal heat dissipation structure according to claim 3, characterized in that: The dust blocking fixing mechanism comprises: A receiving groove is provided on the heat dissipation plate and cooperates with the arc-shaped flip dust shield; A limiting slide groove is arranged in the heat dissipation plate and communicated with the containing groove; A limiting slider, one end of which is away from the heat sink and is provided with an extrusion surface, and the limiting slider is slidably matched with the limiting sliding groove; The fourth elastic member has two ends fixedly connected to an end of the limiting sliding block away from the extrusion surface and the inner wall of the limiting sliding groove respectively; The second limiting block is fixed in the limiting sliding groove and abuts against an end of the limiting sliding block away from the extrusion surface.

5. The permanent magnet integrated machine with internal heat dissipation structure according to claim 4, characterized in that: The pneumatic drive mechanism comprises: The ventilation cavity is arranged in the heat dissipation plate and is connected with an end of the limiting slide groove away from the containing groove; The mounting sleeve is fixed on the heat dissipation plate and communicated with the middle of the ventilation cavity; A connecting slide rod, one end of which passes through the axis of the fan shaft and the axis of the motor shaft and is fixedly connected to the driving slide block, and the other end of which is slidably connected to the mounting sleeve; A connecting block is fixedly connected to one end of the connecting slide rod located in the installation sleeve and is slidably matched with the installation sleeve; The one-way piston pressurizing assembly is connected to the connecting block to control the air pressure in the ventilation cavity.

6. The permanent magnet integrated machine with internal heat dissipation structure according to claim 5, characterized in that: The one-way piston pressurizing assembly comprises: A pull rope, one end of which is fixed to the connecting block; The movable screw sleeve is slidably arranged in the installation sleeve; The driving rod is rotatably disposed in the ventilation cavity and the mounting sleeve and is threadedly connected with the movable screw sleeve; The piston plate slides in contact with the inner wall of the mounting sleeve and is threadedly connected with the driving rod; The position where the driving rod is threadedly connected with the movable screw sleeve and the piston plate is a thread with opposite rotation directions.

7. The permanent magnet integrated machine with internal heat dissipation structure according to claim 6, characterized in that: A filtering self-cleaning mechanism connected to a bowl-shaped wind shield is installed on one side of the heat sink away from the heat dissipation plate. The filtering self-cleaning mechanism realizes self-cleaning through the displacement of the connecting slide rod.

8. The permanent magnet integrated machine with internal heat dissipation structure according to claim 7, characterized in that: The filtering self-cleaning mechanism comprises: Filter element; The screw sleeve is rotated to be connected with the filter element in rotation and is threadedly connected with the connecting slide rod; The dust scraping member is installed on the rotating screw sleeve and abuts against a side of the filter member close to the heat dissipation plate.

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