A motor with a built-in fan

Abstract

The present invention relates to the field of motor heat dissipation, and discloses a motor with a built-in fan, including a motor housing, a heat dissipation rib arranged on the outer wall of the motor housing, a heat dissipation tail cover arranged at the rear end of the motor housing, and a motor shaft arranged in the middle of the motor housing; one end of the motor shaft extends to the inner side of the heat dissipation tail cover and is provided with a heat dissipation fan assembly, the heat dissipation fan assembly includes a hollow shaft fixedly arranged on the motor shaft and extending to one end of the inner side of the heat dissipation tail cover, the inner side of the hollow shaft is connected with a sliding block along the axial direction of the motor shaft, and the outer side of the sliding block is evenly provided with fixed grooves. The heat dissipation fan assembly can automatically adjust the inclination angle of the blades during rotation, and adjust according to the magnitude of the centrifugal force. When the speed is high, the inclination angle increases, and the pressure difference on both sides of the blade is greater, which can generate greater wind pressure, which helps to improve the heat dissipation effect, thereby adapting to the high heat generated when the motor rotates at a high speed, and vice versa, the wind pressure is reduced, which is conducive to reducing energy consumption.

Description

Technical Field

[0001] The invention relates to the field of motor heat dissipation, and in particular to a motor with a built-in fan. Background Art

[0002] A motor, also called an electric motor, is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to convert electrical energy into mechanical energy as a power source for electrical appliances or various machines. Since a lot of heat is generated inside the motor when it rotates, and the heat will affect the service life and performance of the motor, many heat dissipation ribs are set along the circumference of the motor casing, and a heat dissipation fan is also set in the cover at the tail end of the motor. The two work together to achieve heat dissipation of the motor.

[0003] However, the cooling fan in the prior art is fixed on the motor shaft and rotates synchronously with the motor shaft. Once the size and inclination angle of the blades are determined, they remain unchanged. When the motor is at high speed, more heat is generated, and relatively less heat is generated at low speed. Therefore, once the inclination angle and size of the blades are determined, it is easy to have insufficient heat dissipation capacity at high speed and excessive heat dissipation capacity at low speed. Insufficient heat dissipation capacity will affect the performance and life of the motor, and excessive heat dissipation capacity will increase energy consumption, which is inconvenient to use.

[0004] Therefore, it is necessary to propose a motor with a built-in fan to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a motor with a built-in fan, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A motor with a built-in fan comprises a motor housing, a heat dissipation rib arranged on the outer wall of the motor housing, a heat dissipation tail cover arranged at the rear end of the motor housing, and a motor shaft arranged in the middle of the motor housing;

[0008] One end of the motor shaft extends to the inner side of the heat dissipation tail cover and is provided with a heat dissipation fan assembly, and the heat dissipation fan assembly includes a hollow shaft fixedly arranged on the motor shaft and extending to one end of the inner side of the heat dissipation tail cover, the inner side of the hollow shaft is connected with a sliding block in a sliding manner along the axial direction of the motor shaft, the outer side of the sliding block is evenly provided with a fixing groove, and one side of the inner cavity of the fixing groove is fixedly provided with a rack arranged parallel to the motor shaft, and blades are evenly arranged on the outer side of the hollow shaft along the circumference of the hollow shaft, and a fixed shaft is fixedly arranged on one end of the blade close to the hollow shaft, and the fixed shaft is rotatably connected to the side wall of the hollow shaft, and the fixed shaft is away from the blade. One end of the sheet extends to the inner side of the fixed groove and is fixedly provided with a gear meshing with the rack, a spring is provided between the side of the sliding block close to the motor shaft and the inner wall of the hollow shaft, a first guide groove is evenly arranged around the side of the sliding block away from the motor shaft, a slider is slidably connected to the first guide groove, and the slider cooperates with the inner wall inclined surface of the first guide groove, a sliding rod extending to the outside of the hollow shaft is fixedly provided on one side of the slider, and a counterweight head is fixedly provided on one end of the sliding rod extending to the outside of the hollow shaft, and the sliding rod cooperates with the sliding guide of the hollow shaft, so that when the sliding rod drives the slider to move, the sliding block moves along the axial direction of the motor shaft;

[0009] It also includes an area adjustment component, which includes a receiving groove arranged on the side of the blade, the receiving grooves on the left and right sides of the blade are movably connected with expansion side plates, the receiving groove at one end of the blade away from the hollow shaft is movably connected with the expansion end plate, a sliding groove corresponding to the receiving groove is arranged in the middle part of the inner side of the blade, the sliding groove is movably connected with a driving plate along the radial direction of the hollow shaft, and the end of the driving plate away from the expansion end plate is fixedly connected to the expansion end plate, guide rods are obliquely arranged on the left and right sides of the driving plate, a convex plate is arranged on the side of the expansion side plate close to the driving plate, and the end of the convex plate away from the expansion side plate extends to the inner side of the sliding groove and is connected to the expansion end plate. The guide rod is movably sleeved and is configured to expand the side plate to move toward the outside of the accommodating groove when the driving plate moves in a direction away from the hollow shaft. A notch corresponding to the end of the driving plate is provided at a corner of the blade close to one end of the hollow shaft. A guide plate corresponding to the fixed shaft and in an arc shape is fixedly provided on the outside of the hollow shaft. The axis of the guide plate coincides with the axis of the fixed shaft, and the cross-section of the guide plate along the radial direction of the hollow shaft is "T"-shaped, and the side of the guide plate away from the hollow shaft is a slope, and the end of the guide plate away from the hollow shaft is movably guided and connected to the end of the driving plate, so that the driving plate is displaced along the radial direction of the hollow shaft when the fixed shaft drives the blade to rotate.

[0010] Preferably, each fixed shaft corresponds to two guide plates, and the guide plates are distributed on both sides of the fixed shaft in a centrally symmetrical manner.

[0011] Preferably, a second fixing ring with a diameter larger than the diameter of the motor housing is fixedly provided on the outer side of one end of the motor housing close to the heat dissipation tail cover, a first fixing ring is fixedly provided on the outer side of the second fixing ring, the heat dissipation tail cover is fixed on the outer side of the first fixing ring, and an intake pipe arranged parallel to the motor shaft is evenly surrounded and penetrated on the second fixing ring, and the intake pipe corresponds to the gap between adjacent heat dissipation ribs one by one.

[0012] Preferably, in the initial state of the spring, the side surfaces of the plurality of blades are flush, and the diameter of the blades is smaller than the inner diameter of the second fixing ring.

[0013] Preferably, a dustproof net is detachably provided at one end of the inner side of the air intake pipe close to the heat dissipation ribs.

[0014] Preferably, the heat dissipation tail cover is provided with a cleaning component, and the cleaning component includes a bearing seat fixedly arranged on the movable inner wall of the heat dissipation tail cover, and the bearing seat is rotatably connected with a rotating shaft arranged parallel to the motor shaft, and the bearing seat is rotatably connected with a rotating shaft through a bearing, and a cleaning frame in a "U" shape and corresponding to the blade is fixedly arranged on the outside of one end of the rotating shaft, and cleaning sponge strips are arranged at both ends of the inner side of the cleaning frame, and the gap between the two cleaning sponge strips is adapted to the thickness of the blade, and a third guide groove in a spiral shape is arranged on the outer side of one end of the rotating shaft away from the cleaning frame, and one end of the heat dissipation tail cover is provided with a cleaning frame corresponding to the cleaning frame. The cam is provided with a second cam which is movably connected to the movable frame, and the cam is provided with a screw rod which is rotatably connected to the movable frame, and the cam is screwed on the fixed frame, so that the movable frame can be displaced by rotating the screw rod, and the cam rod can drive the movable frame to rotate by the second cam through the third guide groove.

[0015] Preferably, a first exhaust groove is provided on the side of the heat dissipation tail cover away from the motor housing, and a sealing plate is rotatably connected to one end of the inner cavity of the heat dissipation tail cover away from the motor housing, and a second exhaust groove corresponding to the first exhaust groove is provided on the sealing plate.

[0016] Preferably, a traction plate is fixedly provided at one end of the sealing plate, and a second inclined guide groove is provided on the traction plate. The end of the movable frame extending to the inner side of the heat dissipation tail cover is provided with a first convex shaft corresponding to the second guide groove and coordinated with the movable guide, so that the sealing plate rotates when the movable frame drives the first convex shaft to move.

[0017] Preferably, when the second exhaust groove is in a matching state with the first exhaust groove, the cleaning frame is attached to the inner wall of the heat dissipation tail cover, and when the blocking plate rotates to drive the second exhaust groove to be offset from the first exhaust groove, the cleaning frame flips toward the direction of the blade.

[0018] Preferably, a sealing plate for sealing the through slot is fixedly provided at the outer end of the movable frame, and the sealing plate is slidably matched with the outer side of the heat dissipation tail cover, and the length of the sealing plate is greater than the length of the through slot.

[0019] Compared with the prior art, the present invention provides a motor with a built-in fan, which has the following beneficial effects:

[0020] The motor of the built-in fan can automatically adjust the inclination angle of the blades during rotation through the provided cooling fan assembly, and adjust the angle according to the size of the centrifugal force. When the speed is high, the inclination angle increases, and the pressure difference on both sides of the blade is larger, which can generate greater wind pressure, thereby helping to improve the heat dissipation effect, thereby adapting to the high heat generated when the motor rotates at high speed. Conversely, the wind pressure is reduced, which is beneficial to reducing energy consumption and avoiding energy waste due to excessive heat dissipation capacity. The area of ​​the blades can be easily adjusted through the provided area adjustment assembly, which is linked with the cooling fan assembly. When the inclination angle is increased at high speed, the area increases synchronously, thereby increasing the volume of air passing through the blades per unit time, so that more air is sucked in and discharged through the cooling fan, further improving the heat dissipation capacity at high speed. The structure is linked and compact, and it is easy to use.

[0021] The motor with a built-in fan can draw hot air between adjacent heat dissipation ribs at a high speed through the provided air intake pipe and the second fixing ring, thereby accelerating the flow of air, facilitating rapid heat dissipation of the heat dissipation ribs, and improving the heat dissipation effect of the motor housing exterior.

[0022] The motor of the built-in fan can clean both sides of the blades through the cleaning component to avoid dust accumulation during long-term use. There is no need to open the motor housing or the heat dissipation tail cover, which increases practicality and convenience. The mutual cooperation of the sealing plate, the first cam, the second exhaust groove, the traction plate, and the second guide groove can facilitate the sealing of the first exhaust groove at the end of the motor when not in use, avoiding the entry of dust and impurities. The cleaning component is linked to the cleaning component to seal the first exhaust groove while cleaning the blades, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the present invention in a disassembled state;

[0025] Figure 3 The present invention Figure 2 A structural diagram from another perspective based on the above;

[0026] Figure 4 It is a schematic diagram of the structure of the air intake pipe and the second fixing ring of the present invention in a separated state;

[0027] Figure 5 It is a schematic diagram of the overall structure of the hollow shaft and blades of the present invention;

[0028] Figure 6 The present invention Figure 5 Schematic diagram of the structure of the foundation with the sliding block and the hollow shaft disassembled;

[0029] Figure 7 The present invention Figure 6 A structural diagram from another perspective based on the above;

[0030] Figure 8 is a structural schematic diagram highlighting the guide plate of the present invention;

[0031] Fig. 9 It is a schematic diagram of the structure of the blade, the sliding block, the driving plate and the rack of the present invention in a disassembled state;

[0032] Fig.10 It is a structural schematic diagram of the sliding block of the present invention;

[0033] Fig.11 It is a schematic diagram of the structure of the blades, the extended end plate, the extended side plate and the driving plate of the present invention in a separated state;

[0034] Fig.12 It is a structural schematic diagram of another form of separation of the expanded end plate, the expanded side plate, the drive plate and the blades of the present invention;

[0035] Fig.13 It is a structural schematic diagram of the heat dissipation tail cover of the present invention;

[0036] Fig.14 It is a schematic diagram of the structure of the heat dissipation tail cover, the blocking plate and the cleaning assembly of the present invention in a disassembled state;

[0037] Fig.15 It is a schematic diagram of the structure of the present invention when the driving cylinder and the rotating shaft are separated;

[0038] Fig.16 The present invention Fig.15 A structural diagram from another perspective based on the above;

[0039] Fig.17 It is a schematic diagram of the cross-sectional structure of the driving cylinder of the present invention.

[0040] In the figure: 1, motor housing; 2, heat dissipation tail cover; 3, heat dissipation ribs; 4, air intake pipe; 5, first fixing ring; 6, first exhaust groove; 7, motor shaft; 8, blades; 9, blocking plate; 10, second fixing ring; 11, hollow shaft; 12, counterweight head; 13, slide bar; 14, expansion end plate; 15, expansion side plate; 16, sliding block; 17, spring; 18, guide plate; 19, fixed shaft; 20, gear; 21, rack; 22, fixing groove; 23, first guide groove; 24. Drive plate; 25. Protruding plate; 26. Accommodating groove; 27. Guide rod; 28. Sliding groove; 29. ​​Cleaning frame; 30. Notch; 31. Second exhaust groove; 32. Pulling plate; 33. Second guide groove; 34. Through groove; 35. Sealing plate; 36. Cleaning sponge strip; 37. Moving frame; 38. First convex shaft; 39. Drive cylinder; 40. Fixed seat; 41. Screw; 42. Third guide groove; 43. Second convex shaft; 44. Sliding block; 45. Bearing seat; 46. Rotating shaft. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0042] like Figure 1-Figure 3 , Figure 5-Figure 7 , Figure 9-12As shown, a motor with a built-in fan comprises a motor housing 1, a heat dissipation rib 3 arranged on the outer wall of the motor housing 1, a heat dissipation tail cover 2 arranged at the rear end of the motor housing 1, and a motor shaft 7 arranged in the middle of the motor housing 1, a side of the heat dissipation tail cover 2 away from the motor housing 1 is provided with a first exhaust slot 6, one end of the motor shaft 7 extends to the inner side of the heat dissipation tail cover 2 and is provided with a heat dissipation fan assembly, the heat dissipation fan assembly comprises a hollow shaft 11 fixedly arranged on the motor shaft 7 and extending to one end of the inner side of the heat dissipation tail cover 2, a sliding block 16 is slidably connected to the inner side of the hollow shaft 11 along the axial direction of the motor shaft 7, a fixed groove 22 is evenly arranged on the outer side of the sliding block 16, a rack 21 arranged parallel to the motor shaft 7 is fixedly arranged on one side of the inner cavity of the fixed groove 22, blades 8 are evenly arranged on the outer side of the hollow shaft 11 along the circumference of the hollow shaft 11, a fixed shaft 19 is fixedly arranged on one end of the blade 8 close to the hollow shaft 11, and The fixed shaft 19 is rotatably connected to the side wall of the hollow shaft 11, and the end of the fixed shaft 19 away from the blade 8 extends to the inner side of the fixed groove 22 and is fixedly provided with a gear 20 meshing with the rack 21. A spring 17 is provided between the side of the sliding block 16 close to the motor shaft 7 and the inner wall of the hollow shaft 11, and the side of the sliding block 16 away from the motor shaft 7 is evenly surrounded by a first guide groove 23, and a slider 44 is slidably connected to the first guide groove 23, and the slider 44 cooperates with the inner wall inclined surface of the first guide groove 23. A sliding rod 13 extending to the outside of the hollow shaft 11 is fixedly provided on one side of the slider 44, and a counterweight head 12 is fixedly provided on one end of the sliding rod 13 extending to the outside of the hollow shaft 11, and the sliding rod 13 cooperates with the sliding guide of the hollow shaft 11, so that when the sliding rod 13 drives the slider 44 to move, the sliding block 16 moves axially along the motor shaft 7, and the sides of multiple blades 8 are flush when the spring 17 is in the initial state;

[0043] like Figure 5-Figure 12As shown, it also includes an area adjustment component, which includes a receiving groove 26 arranged on the side of the blade 8, the receiving grooves 26 on the left and right sides of the blade 8 are movably connected to the expansion side plate 15, the receiving groove 26 at one end of the blade 8 away from the hollow shaft 11 is movably connected to the expansion end plate 14, and a sliding groove 28 corresponding to the receiving groove 26 is arranged in the middle part of the inner side of the blade 8, the sliding groove 28 is movably connected to the driving plate 24 along the radial direction of the hollow shaft 11, and the end of the driving plate 24 away from the expansion end plate 14 is fixedly connected to the expansion end plate 14, and guide rods 27 are obliquely arranged on the left and right sides of the driving plate 24, and a convex plate 25 is arranged on the side of the expansion side plate 15 close to the driving plate 24, and the end of the convex plate 25 away from the expansion side plate 15 extends to the inner side of the sliding groove 28 and is movably sleeved with the guide rod 27, and is configured so that when the driving plate 24 moves away When the hollow shaft 11 is displaced in the direction, the expanded side plate 15 is displaced toward the outer side of the accommodating groove 26, and a notch 30 corresponding to the end of the driving plate 24 is provided at the corner of the blade 8 close to one end of the hollow shaft 11, and a guide plate 18 corresponding to the fixed shaft 19 and in an arc shape is fixedly provided on the outer side of the hollow shaft 11, and each fixed shaft 19 corresponds to two guide plates 18, and the guide plates 18 are centrally symmetrically distributed on both sides of the fixed shaft 19, and the axis of the arc-shaped guide plate 18 coincides with the axis of the fixed shaft 19, and the cross-section of the guide plate 18 along the radial direction of the hollow shaft 11 is "T"-shaped, and the side of the guide plate 18 away from the hollow shaft 11 is a slope, and the end of the guide plate 18 away from the hollow shaft 11 is movably guided and connected to the end of the driving plate 24, so that when the fixed shaft 19 drives the blade 8 to rotate, the driving plate 24 is displaced along the radial direction of the hollow shaft 11.

[0044] like Figure 1-Figure 4 As shown, in order to achieve accelerated heat dissipation outside the motor housing 1, a second fixing ring 10 with a diameter larger than the diameter of the motor housing 1 is fixedly provided on the outer side of one end of the motor housing 1 close to the heat dissipation tail cover 2. When the speed is low or the stop state, the diameter of the blade 8 is smaller than the inner diameter of the second fixing ring 10. A first fixing ring 5 is fixedly provided on the outer side of the second fixing ring 10. The heat dissipation tail cover 2 is fixed on the outer side of the first fixing ring 5. An intake pipe 4 arranged parallel to the motor shaft 7 is evenly surrounded and penetrated on the second fixing ring 10, and the gap between the intake pipe 4 and the adjacent heat dissipation ribs 3 corresponds one to one. A dustproof net is detachably provided on the inner side of the intake pipe 4 close to the heat dissipation rib 3. Conventional means, not shown in the figure, prevent dust from entering the heat dissipation tail cover 2.

[0045] like Figure 13-Figure 17As shown, a cleaning assembly is provided on the heat dissipation tail cover 2, and the cleaning assembly includes a bearing seat 45 fixedly provided on the movable inner wall of the heat dissipation tail cover 2, and a rotating shaft 46 arranged parallel to the motor shaft 7 is rotatably connected to the bearing seat 45, and a rotating shaft 46 is rotatably connected to the bearing seat 45 through a bearing, and a cleaning frame 29 in a "U" shape corresponding to the blade 8 is fixedly provided on the outside of one end of the rotating shaft 46, and cleaning sponge strips 36 are provided at both ends of the inner side of the cleaning frame 29, and the gap between the two cleaning sponge strips 36 is adapted to the thickness of the blade 8, and a third spiral guide groove 42 is provided on the outer side of one end of the rotating shaft 46 away from the cleaning frame 29, and a through groove 34 corresponding to the cleaning sponge strip 36 is provided at one end of the heat dissipation tail cover 2 The through slot 34 is slidably connected to a moving frame 37, one end of the through slot 34 extends to the inner side of the heat dissipation tail cover 2 and is fixedly provided with a driving cylinder 39 corresponding to the rotating shaft 46, the driving cylinder 39 is movably sleeved on the end of the rotating shaft 46 away from the cleaning frame 29, and one end of the inner wall of the driving cylinder 39 is provided with a second convex shaft 43 movably connected to the third guide groove 42, and one end of the outer side of the heat dissipation tail cover 2 is provided with a fixing seat 40 corresponding to the moving frame 37, one side of the outer end of the moving frame 37 is rotatably connected with a screw rod 41, and one end of the screw rod 41 away from the moving frame 37 is threadedly matched with the fixing seat 40, so that rotating the screw rod 41 can drive the moving frame 37 to move, and then the second convex shaft 43 drives the rotating shaft 46 to rotate through the third guide groove 42;

[0046] The cleaning assembly provided can be used to clean both sides of the blade 8 to avoid dust accumulation due to long-term use, without opening the motor housing 1 or the heat dissipation tail cover 2, thereby increasing practicality and convenience.

[0047] like Figure 13-Figure 16 As shown, in order to block the first exhaust groove 6 when not in use, a sealing plate 9 is rotatably connected to the end of the inner cavity of the heat dissipation tail cover 2 away from the motor housing 1, and a second exhaust groove 31 corresponding to the first exhaust groove 6 is arranged on the sealing plate 9, and a traction plate 32 is fixedly arranged at one end of the sealing plate 9, and a second inclined guide groove 33 is arranged on the traction plate 32, and a movable convex shaft 38 corresponding to the second guide groove 33 and movable guiding is arranged on one end of the movable frame 37 extending to the inner side of the heat dissipation tail cover 2, so that the sealing plate 9 rotates when the movable frame 37 drives the first convex shaft 38 to move, and when the second exhaust groove 31 is in a coincident state with the first exhaust groove 6, the cleaning frame 29 is attached to the inner wall of the heat dissipation tail cover 2, and when the sealing plate 9 rotates to drive the second exhaust groove 31 to stagger with the first exhaust groove 6, the cleaning frame 29 flips in the direction of the blade 8, and is linked with the cleaning component to block the first exhaust groove 6 while cleaning the blade 8, which is convenient to operate.

[0048] like Figure 14-16As shown, in order to seal the through slot 34 and prevent foreign matter from entering the heat dissipation tail cover 2, a sealing plate 35 for sealing the through slot 34 is fixedly provided at the outer end of the movable frame 37, and the sealing plate 35 is slidably matched with the outer side of the heat dissipation tail cover 2, and the length of the sealing plate 35 is greater than the length of the through slot 34, so that the sealing plate 35 always covers the through slot 34 when the movable frame 37 is displaced.

[0049] Working principle: when in use, the second exhaust groove 31 is consistent with the first exhaust groove 6, the cleaning frame 29 is hidden and fits on the inner wall of the heat dissipation tail cover 2, and multiple blades 8 are in a vertical state, and the sides of multiple blades 8 are flush. When the motor runs at a high speed, the counterweight head 12 is subjected to a large centrifugal force, thereby driving the slider 44 to move toward the outer peripheral direction of the sliding block 16 through the sliding rod 13. Since the slider 44 cooperates with the inner wall inclined surface of the first guide groove 23, the sliding block 16 is displaced along the axial direction of the motor shaft 7 and compresses the spring 17, so that the sliding block 16 drives the rack 21 to move horizontally, and the rack 21 drives the gear 20 to rotate a certain angle, and then the gear 20 drives the blade 8 to rotate a certain angle through the fixed shaft 19, so that the inclination angle of the blade 8 increases, and the pressure difference on both sides of the blade 8 is larger, and a greater wind pressure can be generated, which is helpful to improve the heat dissipation effect, so as to adapt to the high heat generated when the motor rotates at a high speed. On the contrary, the wind pressure is reduced, which is beneficial to reduce energy consumption and avoid waste of energy due to excessive heat dissipation capacity. Under the guiding action of the plate 18, the driving plate 24 inside the blade 8 is radially displaced along the hollow shaft 11, and the driving plate 24 drives the expansion end plate 14 to move outward. The driving plate 24 drives the expansion side plate 15 to move outward through the guide rod 27 and the convex plate 25, so that the area of ​​the blade 8 is increased. When the inclination angle is increased at a high speed, the area is simultaneously increased, so that the volume of air passing through the blade 8 per unit time is increased, so that more air is sucked in and discharged through the heat dissipation fan, and the heat dissipation capacity at a high speed is further improved. Moreover, after the area is increased, the expansion end plate 14 will correspond to the second fixing ring 10, so that when rotating, the hot air inside the motor housing 1 can be sucked, and the airflow between adjacent heat dissipation ribs 3 can be sucked through the air intake pipe 4, so as to accelerate the circulation of the airflow outside the motor housing 1, facilitate rapid heat exchange, and dissipate heat inside and outside at the same time, which greatly increases the heat dissipation capacity at a high speed. At a low speed, the area of ​​the blade 8 is reduced, the inclination angle is reduced, and the heat dissipation capacity is reduced, so as to adapt to the low heat generation at a low speed and avoid excessive heat dissipation capacity and increase energy consumption;

[0050] In addition, when in the stopped state, the screw rod 41 is screwed to drive the moving frame 37 to move, the moving frame 37 drives the first cam 38 and the driving cylinder 39 to move synchronously, the driving cylinder 39 drives the second cam 43 to move, the second cam 43 drives the rotating shaft 46 to rotate under the action of the third guide groove 42, the rotating shaft 46 drives the cleaning frame 29 to rotate, the cleaning frame 29 is turned to the outside of the blade 8, and when the first cam 38 is displaced, the second guide groove 33 can drive the blocking plate 9 to rotate a certain angle, so that the second exhaust groove 31 is staggered with the first exhaust groove 6, and the first exhaust groove 6 is staggered. 6 is blocked by the blocking plate 9 to prevent foreign matter and dust from entering when not in use. When the cleaning frame 29 is flipped to the outside of the blade 8, the motor shaft 7 can be controlled to rotate slowly for a few weeks, and the blade 8 and the cleaning sponge strip 36 are relatively displaced, so that the cleaning sponge strip 36 cleans the outside of the blade 8. Cleaning can be achieved without disassembly. The cleaned dust can be discharged from the first exhaust groove 6 through the airflow when it is used next time. The screw 41 can be reversed before subsequent use to reset the cleaning frame 29 to hide it, and the second exhaust groove 31 can be matched with the first exhaust groove 6 again.

[0051] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A motor with a built-in fan, comprising a motor housing (1), a heat dissipation rib (3) arranged on the outer wall of the motor housing (1), a heat dissipation tail cover (2) arranged at the rear end of the motor housing (1), and a motor shaft (7) arranged in the middle of the motor housing (1); Features: One end of the motor shaft (7) extends to the inside of the heat dissipation tail cover (2) and is provided with a heat dissipation fan assembly, the heat dissipation fan assembly comprising a hollow shaft (11) fixedly arranged at one end of the motor shaft (7) extending to the inside of the heat dissipation tail cover (2), the inside of the hollow shaft (11) is slidably connected with a sliding block (16) along the axial direction of the motor shaft (7), the outside of the sliding block (16) is evenly provided with a fixing groove (22), one side of the inner cavity of the fixing groove (22) is fixedly provided with a rack (21) arranged parallel to the motor shaft (7), the outside of the hollow shaft (11) is evenly provided with blades (8) along the circumference of the hollow shaft (11), the end of the blade (8) close to the hollow shaft (11) is fixedly provided with a fixing shaft (19), and the fixing shaft (19) is rotatably connected to the side wall of the hollow shaft (11), and the end of the fixing shaft (19) away from the blade (8) extends to the fixing shaft (19) A gear (20) meshing with the rack (21) is fixedly arranged on the inner side of the groove (22); a spring (17) is arranged between the side of the sliding block (16) close to the motor shaft (7) and the inner wall of the hollow shaft (11); a first guide groove (23) is evenly arranged around the side of the sliding block (16) away from the motor shaft (7); a slider (44) is slidably connected to the first guide groove (23), and the slider (44) cooperates with the inner wall inclined surface of the first guide groove (23); a sliding rod (13) extending to the outside of the hollow shaft (11) is fixedly arranged on one side of the slider (44); a counterweight head (12) is fixedly arranged on one end of the sliding rod (13) extending to the outside of the hollow shaft (11), and the sliding rod (13) cooperates with the hollow shaft (11) in a sliding guide, so that when the sliding rod (13) drives the slider (44) to move, the sliding block (16) moves axially along the motor shaft (7); The blade (8) further comprises an area adjustment component, the area adjustment component comprising a receiving groove (26) arranged on the side of the blade (8), the receiving grooves (26) on the left and right sides of the blade (8) are both movably connected to the expansion side plate (15), the receiving groove (26) at the end of the blade (8) away from the hollow shaft (11) is movably connected to the expansion end plate (14), a sliding groove (28) corresponding to the receiving groove (26) is arranged in the middle of the inner side of the blade (8), the sliding groove (28) is movably connected to the driving plate (24) along the radial direction of the hollow shaft (11), and the end of the driving plate (24) away from the expansion end plate (14) is fixedly connected to the expansion end plate (14), the left and right sides of the driving plate (24) are obliquely provided with guide rods (27), and a convex plate (25) is arranged on the side of the expansion side plate (15) close to the driving plate (24), and the end of the convex plate (25) away from the expansion side plate (15) extends to the inner side of the sliding groove (28) and The side plate (15) is movably sleeved with the guide rod (27) and is configured to expand the side plate (15) to move toward the outside of the accommodating groove (26) when the driving plate (24) moves in a direction away from the hollow shaft (11). A notch (30) corresponding to the end of the driving plate (24) is provided at a corner of the blade (8) close to one end of the hollow shaft (11). An arc-shaped guide plate (18) corresponding to the fixed shaft (19) is fixedly provided on the outside of the hollow shaft (11). The guide plate ( The axis of the guide plate (18) coincides with the axis of the fixed shaft (19), and the cross-section of the guide plate (18) along the radial direction of the hollow shaft (11) is in a "T" shape, and the side of the guide plate (18) away from the hollow shaft (11) is a slope, and the end of the guide plate (18) away from the hollow shaft (11) is movably guided and connected to the end of the driving plate (24), so that when the fixed shaft (19) drives the blade (8) to rotate, the driving plate (24) is displaced along the radial direction of the hollow shaft (11).

2. The motor with a built-in fan according to claim 1, characterized in that: Each fixed shaft (19) corresponds to two guide plates (18), and the guide plates (18) are centrally symmetrically distributed on both sides of the fixed shaft (19).

3. The motor with a built-in fan according to claim 1, characterized in that: A second fixing ring (10) having a diameter greater than that of the motor housing (1) is fixedly arranged on the outer side of one end of the motor housing (1) close to the heat dissipation tail cover (2); a first fixing ring (5) is fixedly arranged on the outer side of the second fixing ring (10); the heat dissipation tail cover (2) is fixed on the outer side of the first fixing ring (5); an air intake pipe (4) arranged parallel to the motor shaft (7) is uniformly surrounded and penetrated on the second fixing ring (10); and the gaps between the air intake pipe (4) and adjacent heat dissipation ribs (3) correspond one to one.

4. The motor with a built-in fan according to claim 3, characterized in that: When the spring (17) is in an initial state, the side surfaces of the plurality of blades (8) are flush, and the diameter of the blades (8) is smaller than the inner diameter of the second fixing ring (10).

5. The motor with a built-in fan according to claim 3, characterized in that: A dustproof net is detachably provided at one end of the inner side of the air intake pipe (4) close to the heat dissipation rib (3).

6. The motor with a built-in fan according to claim 4, characterized in that: The heat dissipation tail cover (2) is provided with a cleaning assembly, the cleaning assembly comprising a bearing seat (45) fixedly arranged on the movable inner wall of the heat dissipation tail cover (2), a rotating shaft (46) arranged parallel to the motor shaft (7) being rotatably connected to the bearing seat (45), the rotating shaft (46) being rotatably connected to the bearing seat (45) via a bearing, a cleaning frame (29) in a "U" shape and corresponding to the blade (8) being fixedly arranged on the outside of one end of the rotating shaft (46), cleaning sponge strips (36) being arranged at both ends of the inner side of the cleaning frame (29), and a gap between the two cleaning sponge strips (36) being adapted to the thickness of the blade (8), a third guide groove (42) in a spiral shape being arranged on the outer side of one end of the rotating shaft (46) away from the cleaning frame (29), a through groove (34) corresponding to the cleaning sponge strip (36) being arranged at one end of the heat dissipation tail cover (2). The groove (34) is slidably connected to a movable frame (37); one end of the through groove (34) extends to the inner side of the heat dissipation tail cover (2) and is fixedly provided with a driving cylinder (39) corresponding to the rotating shaft (46); the driving cylinder (39) is movably sleeved on the end of the rotating shaft (46) away from the cleaning frame (29); and one end of the inner wall of the driving cylinder (39) is provided with a second convex shaft (43) movably connected to the third guide groove (42); one end of the outer side of the heat dissipation tail cover (2) is provided with a fixing seat (40) corresponding to the movable frame (37); one side of the outer end of the movable frame (37) is rotatably connected to a screw rod (41); and one end of the screw rod (41) away from the movable frame (37) is threadedly engaged with the fixing seat (40), so that the rotating screw rod (41) can drive the movable frame (37) to move, and then the second convex shaft (43) drives the rotating shaft (46) to rotate through the third guide groove (42).

7. The motor with a built-in fan according to claim 6, characterized in that: A first exhaust groove (6) is provided on a side of the heat dissipation tail cover (2) away from the motor housing (1), and a sealing plate (9) is rotatably connected to an end of the inner cavity of the heat dissipation tail cover (2) away from the motor housing (1), and a second exhaust groove (31) corresponding to the first exhaust groove (6) is provided on the sealing plate (9).

8. The motor with a built-in fan according to claim 7, characterized in that: A traction plate (32) is fixedly provided at one end of the blocking plate (9), and a second inclined guide groove (33) is provided on the traction plate (32). One end of the movable frame (37) extending to the inner side of the heat dissipation tail cover (2) is provided with a first convex shaft (38) corresponding to the second guide groove (33) and movable and guidingly matched, so that the blocking plate (9) rotates when the movable frame (37) drives the first convex shaft (38) to move.

9. The motor with a built-in fan according to claim 8, characterized in that: When the second exhaust groove (31) and the first exhaust groove (6) are in a matching state, the cleaning frame (29) is attached to the inner wall of the heat dissipation tail cover (2); when the blocking plate (9) rotates to drive the second exhaust groove (31) and the first exhaust groove (6) to be offset, the cleaning frame (29) flips in the direction of the blade (8).

10. The motor with a built-in fan according to claim 6, characterized in that: A sealing plate (35) for sealing the through slot (34) is fixedly provided at the outer end of the movable frame (37), and the sealing plate (35) is slidably matched with the outer side of the heat dissipation tail cover (2), and the length of the sealing plate (35) is greater than the length of the through slot (34).

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