Cooling device for motor

Abstract

The invention relates to the technical field of motor cooling, and particularly discloses a cooling device for a motor, the cooling device comprises a motor body and a cooling device, the cooling device comprises a fan, a shunting mechanism and a driving mechanism, the fan is fixedly connected with a rotating shaft, the shunting mechanism comprises a fan cover and a plurality of air pipes, and the fan cover is rotatably arranged at the front end of the fan; a plurality of air pipes are arranged in the shell, the side, away from the fan, of each air pipe is provided with a plurality of cover nozzles, each air pipe is arranged in an air channel formed between the stator and the shell in the axial direction of the rotating shaft, each air pipe comprises an inner pipe and an outer pipe, the outer pipe is provided with a plurality of first air openings and a second air opening, the inner pipe is provided with a plurality of through openings, and in the initial state, the cover nozzles are communicated with the first air openings through the through openings; the motor is provided with the shunting assembly, the interior of the motor body can be uniformly cooled through the multiple first air ports, and when the temperature in the motor body is too high, each area in the motor body is gradually cooled through the independent second air ports, so that the purpose of rapid cooling is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of motor cooling, and in particular to a cooling device for a motor. Background Art

[0002] As the main power source for driving mechanical equipment, the motor will inevitably generate heat when working due to stator winding loss and rotor eddy current effect. Excessive heat will reduce the output power of the motor. When the heat is severe, it will cause demagnetization or even burn out the motor. Therefore, a cooling device needs to be installed in the motor to take away the heat generated by the motor.

[0003] The patent document with authorization announcement number CN117879260B discloses a permanent magnet generator cooling device, including an engine, a generator body and an evaporator wound on the outside of the generator body, and also includes fan blades, an air collecting hood, a cooling assembly and a diversion assembly. The cooling assembly is arranged on one side of the generator body, and the diversion assembly includes a mounting sleeve, which is fixedly connected to the air collecting hood. A diversion pipe is installed on the side of the mounting sleeve away from the air collecting hood, and an air nozzle is connected to one end of the diversion pipe. The patent is provided with a diversion assembly, and a part of the wind blown out by the fan blades is introduced into the interior of the mounting sleeve by the air collecting hood, and enters the air inlet pipe through the air inlet, and then enters the diversion pipe through the connecting pipe, and finally is ejected by the air nozzle to cool the inner wall of the shell of the generator body, and at the same time, the outside of the generator body is cooled in conjunction with the coolant circulation, which solves the problem of limited heat dissipation effect when only a fan is arranged on the outside of the generator.

[0004] However, when the wind blown by the fan is ejected from the air nozzle to cool the inside of the generator body, only the area facing the air nozzle can get a good cooling effect, while other areas have poor cooling effects due to insufficient wind speed and air volume, resulting in uneven cooling of the generator body and failure to guarantee the cooling effect. Summary of the invention

[0005] The present invention provides a cooling device for a motor, aiming to solve the problem that when a cooling device in the related art uses a diverter component to cool the interior of a generator body, only the area facing the air nozzle can obtain a good cooling effect, while other areas have poor cooling effects due to insufficient wind speed and air volume, resulting in uneven cooling of the generator body and failure to ensure the cooling effect.

[0006] A cooling device for a motor of the present invention comprises a motor body, the motor body comprises a housing, a rotating shaft and a stator, and a cooling device, the cooling device comprises a fan, a flow dividing mechanism and a driving mechanism; The fan is arranged at one end of the motor body and is fixedly connected to the rotating shaft; The flow dividing mechanism includes a wind cover and a plurality of wind ducts. The wind cover is rotatably arranged at the front end of the fan, and a plurality of cover nozzles corresponding to and communicating with the wind ducts are arranged on a side away from the fan. Each wind duct is arranged in the wind channel formed between the stator and the shell along the axial direction of the rotating shaft. Each wind duct includes an inner tube and an outer tube rotatably sleeved on the outer side of the inner tube. The outer tube is provided with a plurality of first wind ports and a second wind port. In an initial state, the cover nozzle is communicated with the first wind port and is not communicated with the second wind port. The driving mechanism includes driving component 1, driving component 2 and driving component 3. Driving component 1 is used to drive the wind hood to reciprocate around the axis of the rotating shaft. Driving component 2 is used to drive the outer tube to rotate around its own axis so that the hood mouth is connected with the air outlet 2 and not connected with the air outlet 1. Driving component 3 is used to drive the air duct to reciprocate along the axial direction of the rotating shaft.

[0007] In the initial state, the interior of the motor body can be evenly cooled through multiple air vent pairs. When the temperature inside the motor body is too high, each area inside the motor body can be gradually cooled through a separate air vent pair to achieve rapid cooling.

[0008] Preferably, the inner tube is provided with a plurality of openings that can communicate with air outlet one or air outlet two, the openings include end openings and peripheral openings, the end openings are located on the end of the inner tube away from the fan, the peripheral openings are arranged at intervals along the axial direction of the inner tube on the peripheral side of the inner tube, and are located on the side of the inner tube close to the axis of the rotating shaft, air outlet one includes an end air outlet matched with the end opening, and a peripheral air outlet matched with the peripheral opening, and air outlet two is arranged on the side of the peripheral side of the outer tube away from air outlet one, so that the projections of air outlet one and air outlet two in the axial direction of the outer tube are symmetrical along the axis of the outer tube.

[0009] Preferably, each hood mouth is conical, and its diameter gradually decreases along the direction from the fan to the air duct.

[0010] By gradually reducing the diameter of the hood mouth, the wind blown by the fan will increase in speed after passing through the hood mouth and entering the inside of the air duct, so as to more effectively cool the motor body.

[0011] Preferably, driving component one includes bevel gear one, bevel gear two, bevel gear three and bevel gear four, bevel gear one is fixedly connected to the rotating shaft, and bevel gear one is an incomplete gear, a fixing ring connected to it is provided in the outer shell, bevel gear two and bevel gear three are both rotatably arranged on the fixing ring, bevel gear two and bevel gear three are symmetrically arranged on both sides of the rotating shaft, and are respectively meshed with bevel gear one, bevel gear four is fixedly connected to the wind cover, and is meshed with bevel gear two and bevel gear three.

[0012] Preferably, the diversion assembly also includes a telescopic tube arranged between the wind hood and the air duct, one end of the telescopic tube is connected to the hood mouth, the other end of the telescopic tube is fixedly connected to the inner tube and rotatably connected to the outer tube, and a spring is connected between the two ends of the telescopic tube.

[0013] When the air duct reciprocates along the axial direction of the rotating shaft, the air blown out by the fan can flow smoothly into the interior of the air duct through the extension and contraction of the telescopic tube.

[0014] Preferably, drive component two includes sleeve rod one, sleeve rod two and a driving structure. Sleeve rod one and sleeve rod two are both provided in plurality and are respectively arranged corresponding to a plurality of air ducts. Sleeve rod one is rotatably sleeved on the outside of the telescopic tube, sleeve rod two is rotatably sleeved on the outside of sleeve rod one, and a torsion spring is connected between sleeve rod one and sleeve rod two. A rod is connected to the side of sleeve rod two facing the outer tube. A mounting ring is provided on the outer side of the outer tube, and a through hole is provided on the mounting ring for the rod to pass through, so that the outer tube can slide with the rod through the mounting ring and the outer tube can rotate synchronously with sleeve rod two. The driving structure is used to drive sleeve rod one to rotate.

[0015] Preferably, the driving structure includes a connecting ring, an electric push rod and a connecting rod. The connecting ring is slidably matched with the wind hood along the axial direction of the rotating shaft. The electric push rod is arranged on the wind hood, and the output end is connected to the connecting ring. There are multiple connecting rods, and they are respectively arranged corresponding to multiple air ducts. A spiral groove is provided on the circumferential side of the sleeve rod. One end of the connecting rod is connected to the connecting ring, and the other end is slidably matched with the sleeve rod through the spiral groove.

[0016] Preferably, the projection of the spiral track of the spiral groove in the axial direction of the sleeve rod is in the shape of a semicircle, so that when the connecting rod moves from one end of the spiral groove to the other end of the spiral groove, the sleeve rod rotates 180 degrees.

[0017] The sliding cooperation between the connecting rod and the sleeve rod 1 can make the sleeve rod 1 rotate, and drive the outer tube to rotate, and rotate exactly 180 degrees, so as to switch the air outlet state of the air duct.

[0018] Preferably, drive component three includes a drive member and a plurality of protrusions, the drive member is fixedly connected to the rotating shaft, and a contact surface is formed at an end of the drive member away from the fan, and the contact surface is wavy, and the plurality of protrusions are respectively arranged on mounting rings arranged on the outer sides of the plurality of outer tubes, and the protrusions can contact the contact surface on the drive member.

[0019] Preferably, ventilation holes are provided on the side walls of the driving member.

[0020] Avoid the driving component blocking the air outlet 1 or 2 and affecting the cooling of the motor body.

[0021] The beneficial effects of the present invention are: 1. The present invention is provided with a diversion component. In the initial state, the wind blown by the fan can enter into multiple air ducts through the hood mouth on the wind cover, and blow out through multiple air ports on the air ducts to cool the inside of the motor body. In this process, the wind cover can be driven to rotate back and forth through the driving component, and the multiple air ducts can be driven to move back and forth along the circumference of the motor body, gradually cooling the inside of the motor body to ensure uniform cooling of the motor body.

[0022] 2. The present invention can drive the outer tube to rotate around its own axis through the driving component 2, so that the inner tube and the outer tube can rotate relative to each other, so that the wind blown by the fan enters the air duct through the hood mouth, and then blows out from the air outlet 2 on the air duct to locally cool the inside of the motor body. In this process, through the cooperation of the driving component 1 and the driving component 3, the position of the air outlet 2 is constantly changed, so that the wind blown by the fan can be concentrated to each area in the motor body to achieve the purpose of rapid cooling. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic structural diagram of the present invention cut along the longitudinal direction.

[0025] Figure 3 It is a schematic diagram of the assembly structure of the cooling device and the motor body of the present invention.

[0026] Figure 4 It is a schematic structural diagram of the cooling device of the present invention.

[0027] Figure 5 It is a schematic diagram of the exploded structure of the driving component 1 of the present invention.

[0028] Figure 6 It is a schematic diagram of the assembly structure of the air duct and the driving component 2 of the present invention.

[0029] Figure 7 It is a schematic structural diagram of the air duct of the present invention cut along the longitudinal direction.

[0030] Figure 8 It is a structural schematic diagram of the driving structure of the present invention.

[0031] Reference numerals: 1. Motor body; 11. Casing; 12. Rotating shaft; 13. Stator; 14. Fixing ring; 2. Fan; 3. Wind hood; 31. hood mouth; 4. Air duct; 41. Inner tube; 411. Through port; 411a. End through port; 411b. Peripheral through port; 42. Outer tube; 421. Air outlet 1; 421a. End air outlet; 421b. Peripheral air outlet; 422. Air outlet 2; 423. Mounting ring; 43. Telescopic tube; 44. Spring; 51. Bevel gear 1; 52. Bevel gear 2; 53. Bevel gear 3; 54. Bevel gear 4; 61. Sleeve rod 1; 611. Spiral groove; 62. Sleeve rod 2; 621. Rod; 63. Torsion spring; 64. Connecting ring; 65. Electric push rod; 66. Connecting rod; 71. Driving member; 711. Ventilation hole; 72. Bump; 8. Heat dissipation hole. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] like Figures 1 to 8 As shown, a cooling device for a motor of the present invention comprises a motor body 1 and a cooling device, wherein the motor body 1 comprises a housing 11, a rotating shaft 12 and a stator 13, and the cooling device comprises a fan 2, a diversion mechanism and a driving mechanism.

[0034] The fan 2 is arranged at one end of the motor body 1 and is fixedly connected to the rotating shaft 12. The diversion mechanism includes a wind cover 3 and a plurality of air ducts 4. The wind cover 3 is arranged at the front end of the fan 2 and is rotatably matched with the rotating shaft 12. A plurality of cover nozzles 31 are circumferentially arranged on the side of the wind cover 3 away from the fan 2. The plurality of air ducts 4 are respectively arranged corresponding to the plurality of cover nozzles 31. Each air duct 4 is arranged in the air duct formed between the stator 13 and the outer shell 11 along the axial direction of the rotating shaft 12. Each air duct 4 includes an inner tube 41 and an outer tube 42 rotatably sleeved on the outside of the inner tube 41. The outer tube 42 is provided with a plurality of air outlets 1 421 and a second air outlet 422. In the initial state, the cover nozzle 31 is communicated with the air outlet 1 421, and is not communicated with the air outlet 2 422.

[0035] The driving mechanism includes driving component 1, driving component 2 and driving component 3. Driving component 1 is used to drive the wind hood 3 to reciprocate around the axis of the rotating shaft 12. Driving component 2 is used to drive the outer tube 42 to rotate around its own axis so that the hood mouth 31 is connected with the air outlet 2 422 and is not connected with the air outlet 1 421. Driving component 3 is used to drive multiple air ducts 4 to reciprocate along the axial direction of the rotating shaft 12.

[0036] Specifically, in the initial state, the hood mouth 31 is connected with the multiple air outlets 421 on the air duct 4, so that the wind blown by the fan 2 enters the air duct 4 through the hood mouth 31, and can be blown to the inside of the motor body 1 through the multiple air outlets 421 on the air duct 4. In this process, the wind hood 3 is driven to reciprocate around the axis of the rotating shaft 12 by the driving component 1, and the multiple air ducts 4 are driven to reciprocate along the circumference of the motor body 1 in the air duct, so that the motor body 1 can be evenly cooled. After the cold air completes the heat exchange in the motor body 1, it will be discharged from the motor body 1 through the heat dissipation holes 8; when the local temperature in the motor body 1 is too high, the outer tube 42 is driven to rotate around its own axis by the driving component 2, and the relative rotation between the outer tube 42 and the inner tube 41 will make the hood mouth 31 communicate with the air outlet 2 422, and not communicate with the air outlet 1 421. At this time, the wind After the wind blown by the fan 2 enters the inner tube 41 through the hood mouth 31, it will be blown out through the second air port 422 on the air duct 4 to locally cool the motor body 1. By reducing the number of air outlets, the air volume at the second air port 422 is increased and the wind speed is faster, so that the motor body 1 can be locally cooled more effectively. In this process, the wind cover 3 is driven by the driving component 1 to reciprocate around the axis of the rotating shaft 12, so that the air duct 4 is reciprocated in the circumferential direction of the motor body 1 in the air duct. At the same time, the air duct 4 is driven by the driving component 3 to reciprocate along the axial direction of the rotating shaft 12, so that the position of the second air port 422 is constantly changed, so that the wind blown by the fan 2 can be concentratedly blown to each area in the motor body 1 to achieve the purpose of rapid cooling. At the same time, the dust attached to the inside of the motor body 1 can be blown away to prevent the dust from affecting the heat dissipation of the motor body 1.

[0037] It should be noted that the inner tube 41 is provided with a plurality of openings 411 that can communicate with the air outlet 1 421 or the air outlet 2 422, and the openings 411 include end openings 411a and peripheral openings 411b. The end openings 411a are located on the end of the inner tube 41 away from the fan 2, and the peripheral openings 411b are arranged at intervals along the axial direction of the inner tube 41 on the peripheral side of the inner tube 41, and are located on the side of the inner tube 41 close to the axis of the rotating shaft 12. The air outlet 1 421 includes the end air outlet 421a matched with the end opening 411a, and the peripheral air outlet 421b matched with the peripheral opening 411b, and the air outlet 2 422 is arranged on the side of the peripheral side of the outer tube 42 away from the air outlet 1 421, so that the projections of the air outlet 1 421 and the air outlet 2 422 in the axial direction of the outer tube 42 are symmetrical along the axis of the outer tube 42.

[0038] Specifically, Figures 1 to 7As shown, in the initial state, the hood mouth 31 is connected to the air outlet 421 through the through hole 411, that is, the end air outlet 421a on the outer tube 42 is connected to the end through hole 411a on the inner tube 41, and the multiple peripheral air outlets 421b on the outer tube 42 are correspondingly connected to the multiple peripheral through holes 411b on the inner tube 41, so that the wind blown by the fan 2 can enter the inner tube 41 through the hood mouth 31, and then can be blown to the end of the motor body 1 away from the fan 2 through the end air outlet 421a on the air duct 4, so as to cool the other end of the motor body 1, and at the same time, can be blown to the axis of the motor body 1 through the multiple peripheral air outlets 421b on the air duct 4, so as to cool the center of the motor body 1, so as to evenly cool the motor body 1, and the cold air will be discharged from the motor body 1 through the heat dissipation holes 8 after completing the heat exchange in the motor body 1; when the temperature in the motor body 1 is too high , the outer tube 42 is driven to rotate around its own axis by the second driving component. The relative rotation between the outer tube 42 and the inner tube 41 will cause the end air outlet 421a on the outer tube 42 to be misaligned with the end through hole 411a on the inner tube 41, and the multiple peripheral air outlets 421b on the outer tube 42 to be misaligned with the multiple peripheral through holes 411b on the inner tube 41, so that the cover mouth 31 and the air outlet 1 421 are not connected. When the outer tube 42 rotates 180 degrees, the air outlet 2 422 on the outer tube 42 will be connected to a certain through hole 411 on the inner tube 41. At this time, the wind blown by the fan 2 enters the inner tube 41 through the cover mouth 31, and is blown out through the air outlet 2 422 on the air duct 4. By reducing the number of air outlets, the air volume blown out from the air outlet 2 422 is increased, and the wind speed becomes faster, so that the heat generated in the motor body 1 can be more effectively taken away, thereby improving the cooling efficiency.

[0039] In some embodiments, each hood mouth 31 is conical, and its diameter gradually decreases along the direction from the fan 2 to the air duct 4. Specifically, by gradually reducing the diameter of the hood mouth 31, the wind blown by the fan 2 enters the air duct 4 through the hood mouth 31, and the wind speed increases, so as to more effectively cool the motor body 1.

[0040] like Figures 4 to 8 As shown, the diversion component also includes a telescopic tube 43 arranged between the wind hood 3 and the air duct 4, one end of the telescopic tube 43 is connected to the hood mouth 31, the other end of the telescopic tube 43 is fixedly connected to the inner tube 41, and is rotatably connected to the outer tube 42, and a spring 44 is connected between the two ends of the telescopic tube 43. Specifically, by arranging the telescopic tube 43, the air duct 4 can be reciprocated along the axial direction of the rotating shaft 12, and the air blown by the fan 2 can be smoothly circulated to the inside of the air duct 4 through the telescopic tube 43, and blown out from the air outlet 1 421 or the air outlet 2 422 on the air duct 4.

[0041] In some embodiments, driving component one includes bevel gear one 51, bevel gear two 52, bevel gear three 53 and bevel gear four 54. Bevel gear one 51 is fixedly connected to the rotating shaft 12, and bevel gear one 51 is an incomplete gear. A fixing ring 14 connected to it is provided in the outer casing 11. Bevel gear two 52 and bevel gear three 53 are both rotatably arranged on the fixing ring 14. Bevel gear two 52 and bevel gear three 53 are symmetrically arranged on both sides of the rotating shaft 12 and are respectively meshed with bevel gear one 51. Bevel gear four 54 is fixedly connected to the wind hood 3 and is meshed with bevel gear two 52 and bevel gear three 53.

[0042] Specifically, Figure 1 , Figure 4 and Figure 5 As shown, when the motor body 1 is started to rotate the rotating shaft 12, the bevel gear 1 51 fixedly connected to the rotating shaft 12 will be driven to rotate. Since the bevel gear 1 51 is an incomplete gear, the bevel gear 1 51 will alternately mesh with the bevel gear 2 52 and the bevel gear 3 53 during the rotation. When the bevel gear 1 51 is meshed with the bevel gear 2 52 and disengaged from the bevel gear 3 53, the bevel gear 2 52 can be driven to rotate, and the meshing between the bevel gear 2 52 and the bevel gear 4 54 can be driven to rotate, and the wind hood 3 connected thereto can be driven to rotate. When the bevel gear 1 51 is meshed with the bevel gear 3 When bevel gear 53 is engaged and disengaged from bevel gear 2 52, bevel gear 3 53 can be driven to rotate, and through the engagement between bevel gear 3 53 and bevel gear 4 54, bevel gear 4 54 can be driven to rotate in the opposite direction, and the wind hood 3 can be driven to rotate in the opposite direction, and the wind hood 3 can reciprocate around the axis of the rotating shaft 12, so that multiple air ducts 4 can be driven to reciprocate around the axis of the rotating shaft 12, so that the wind blown by the fan 2 is blown out through the air outlet 1 421 or the air outlet 2 422 on the air duct 4. In the process, the stator 13 can be gradually cooled in the circumferential direction through the reciprocating movement of the air duct 4, thereby increasing the cooling area and improving the cooling effect.

[0043] In some embodiments, the driving assembly 2 includes a sleeve rod 1 61, a sleeve rod 2 62 and a driving structure. The sleeve rod 1 61 and the sleeve rod 2 62 are both provided in plurality and are respectively provided corresponding to the plurality of air ducts 4. The sleeve rod 1 61 is rotatably sleeved on the outside of the telescopic tube 43, and the sleeve rod 2 62 is rotatably sleeved on the outside of the sleeve rod 1 61. A torsion spring 63 is connected between the sleeve rod 1 61 and the sleeve rod 2 62. The sleeve rod 2 62 is connected to a rod 621 on the side facing the outer tube 42. A mounting ring 423 is provided on the outer side of each outer tube 42, and a rod 621 is provided on the mounting ring 423. The through hole 21 passes through, so that the outer tube 42 can slide with the rod 621 through the mounting ring 423, and the outer tube 42 can rotate synchronously with the sleeve rod 62, and the driving structure is used to drive the sleeve rod 1 61 to rotate. In this embodiment, a temperature sensor for monitoring the temperature inside the motor body 1 is provided in the housing 11, and the temperature sensor is connected to the electric control structure, so that after the temperature sensor monitors the temperature inside the motor body 1, the signal is transmitted to the electric control structure, and the driving structure is controlled to start or shut down through the electric control structure.

[0044] Specifically, Figures 1 to 7As shown, when the temperature in the motor body 1 is within the normal range, the driving structure is in a closed state, and the air duct 4 is in an initial state, that is, the hood mouth 31 is connected to the air outlet 1 421 through the through port 411, and is not connected to the air outlet 2 422. At this time, the wind blown by the fan 2 can be blown to the inside of the motor body 1 through the multiple air outlets 1 421 on the air duct 4, so as to evenly cool the motor body 1; when the temperature of a certain place in the motor body 1 exceeds the normal range, the temperature sensor can detect that the temperature is too high and transmit the signal to the electric control structure. At this time, the electric control structure controls the driving structure to open, so as to drive the sleeve rod 1 61 to rotate through the driving structure, and drive the sleeve rod 2 62 to rotate synchronously under the action of the torsion spring 63, and at the same time drive the outer tube 42 to rotate with the sleeve rod 2 62. Through the relative rotation between the outer tube 42 and the inner tube 41, the hood mouth 31 can be connected to the air outlet 2 422 through the through port 411, and is not connected to the air outlet 1 421. The air in the air duct 4 is not connected to each other. At this time, the air blown by the fan 2 can be blown to the inside of the motor body 1 through the air outlet 2 422 on the air duct 4. By reducing the number of air outlets, the air volume blown out from the air outlet 2 422 is increased, and the wind speed becomes faster, so that the area where the air outlet 2 422 is facing can be cooled more effectively. In this process, the air duct 4 is driven to reciprocate around the axis of the rotating shaft 12 by the driving component 1, and the air duct 4 is driven to reciprocate along the axial direction of the rotating shaft 12 by the driving component 3, so that the position of the air outlet 2 422 is constantly changing, so that all areas in the motor body 1 can be gradually and efficiently cooled; when the temperature sensor detects that the temperature has returned to the normal range, it transmits a signal to the electric control structure, and the electric control structure controls the drive structure to close, so that the air duct 4 returns to its initial state. At this time, the air blown by the fan 2 will continue to be evenly blown out through multiple air outlets 1 421 to evenly cool the motor body 1.

[0045] In some embodiments, the driving structure includes a connecting ring 64, an electric push rod 65 and a connecting rod 66. The connecting ring 64 slides with the wind hood 3 along the axial direction of the rotating shaft 12. The electric push rod 65 is arranged on the wind hood 3, and the output end is connected to the connecting ring 64. The connecting rod 66 is provided in plurality and is respectively arranged corresponding to a plurality of air ducts 4. A spiral groove 611 is provided on the circumferential side of the sleeve rod 61. One end of the connecting rod 66 is connected to the connecting ring 64, and the other end slides with the sleeve rod 61 through the spiral groove 611.

[0046] Specifically, Figures 3 to 8As shown, when the temperature sensor detects that the temperature inside the motor body 1 is too high, the signal is transmitted to the electric control structure, and the electric control structure controls the electric push rod 65 to open, so that the output end of the electric push rod 65 extends, driving the connecting ring 64 to move along the axial direction of the rotating shaft 12 toward the wind hood 3, and driving the connecting rod 66 connected to the connecting ring 64 to move synchronously. At this time, the sliding cooperation between the connecting rod 66 and the sleeve rod 1 61 can drive the sleeve rod 1 61 to rotate, and under the cooperation of the sleeve rod 1 61, the sleeve rod 2 62 and the outer tube 42, the outer tube 42 is rotated, so that the hood mouth 31 is connected to the air outlet 2 422 through one of the through ports 411. At this time, the wind energy blown out by the fan 2 The air can be blown to each area in the motor body 1 in a concentrated manner, thereby improving the cooling efficiency. When the temperature sensor detects that the temperature in the motor body 1 has returned to normal, the signal is transmitted to the electric control structure, and the electric control structure controls the electric push rod 65 to close, so that the output end of the electric push rod 65 retracts, and drives the connecting ring 64 and the connecting rod 66 to move away from the wind hood 3. At this time, with the cooperation of the connecting rod 66 and the sleeve rod 61, the sleeve rod 61 and the outer tube 42 will rotate in the opposite direction, so that the hood mouth 31 is connected with the air outlet 421 through the through port 411. At this time, the air blown by the fan 2 can continue to be evenly blown to the inside of the motor body 1 through multiple air outlets 421, thereby ensuring uniform cooling of the motor body 1.

[0047] It should be noted that the projection of the spiral track of the spiral groove 611 in the axial direction of the sleeve rod 61 is semicircular, so that when the connecting rod 66 moves from one end of the spiral groove 611 to the other end of the spiral groove 611, the sleeve rod 61 just rotates 180 degrees.

[0048] In some embodiments, drive component three includes a drive member 71 and a plurality of protrusions 72. The drive member 71 is fixedly connected to the rotating shaft 12, and a contact surface is formed at the end of the drive member 71 away from the fan 2, and the contact surface is wavy. The plurality of protrusions 72 are respectively arranged on a plurality of mounting rings 423, and the protrusions 72 can contact the contact surface on the drive member 71.

[0049] Specifically, Figures 3 to 7As shown, when the motor body 1 is started to rotate the shaft 12, the driving member 71 is driven to rotate around the axis of the shaft 12. In this process, the sleeve rod 1 61 is driven to rotate through the driving structure, and under the action of the torsion spring 63, the sleeve rod 2 62 and the outer tube 42 are driven to rotate, and at the same time, the mounting ring 423 and the protrusion 72 arranged on the mounting ring 423 are driven to rotate. As the protrusion 72 rotates, the protrusion 72 contacts the side wall of the driving member 71, and the driving member 71 blocks the protrusion 72, so that the outer tube 42 and the sleeve rod 2 62 stop rotating. At this time, as the sleeve rod 1 61 continues to rotate, the sleeve rod 1 61 and the sleeve rod 2 62 will rotate relative to each other, and the torsion spring 63 will rotate. 3 is twisted to accumulate force until the concave surface in the contact surface of the driving member 71 rotates to the convex block 72, so that the convex block 72 is separated from the obstruction of the driving member 71. At this time, under the action of the torsion spring 63, the sleeve rod 2 62, the outer tube 42 and the convex block 72 continue to rotate until the stored force of the torsion spring 63 is completely released. At this time, the convex block 72 is located on the side of the driving member 71 away from the fan 2 and contacts the concave surface in the contact surface of the driving member 71. As the driving member 71 continues to rotate, the convex block 72 alternately contacts the concave surface and the convex surface in the contact surface, so that the convex block 72 reciprocates along the axial direction of the rotating shaft 12 under the cooperation of the two, and drives the air duct 4 to reciprocate along the axial direction of the rotating shaft 12.

[0050] like Figure 1 As shown, a ventilation hole 711 is provided on the side wall of the driving member 71, so that the wind blown out from the air outlet 1 421 or the air outlet 2 422 can pass through the ventilation hole 711 and blow toward the motor body 1, thereby preventing the driving member 71 from blocking the air outlet 1 421 or the air outlet 2 422 and affecting the cooling of the motor body 1.

[0051] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cooling device for a motor, comprising a motor body (1), the motor body (1) comprising a housing (11), a rotating shaft (12) and a stator (13), characterized in that: Also included is a cooling device, which includes a fan (2), a flow diversion mechanism and a driving mechanism; The fan (2) is disposed at one end of the motor body (1) and is fixedly connected to the rotating shaft (12); The flow dividing mechanism comprises a wind cover (3) and a plurality of wind ducts (4); the wind cover (3) is rotatably arranged at the front end of the fan (2), and a plurality of cover nozzles (31) corresponding to and communicating with the wind ducts (4) are arranged on a side away from the fan (2); each wind duct (4) is arranged in an air duct formed between the stator (13) and the housing (11) along the axial direction of the rotating shaft (12); each wind duct (4) comprises an inner tube (41) and an outer tube (42) rotatably sleeved on the outer side of the inner tube (41); a plurality of first wind ports (421) and one second wind port (422) are arranged on the outer tube (42); in an initial state, the cover nozzle (31) is in communication with the first wind port (421) and is not in communication with the second wind port (422); The driving mechanism comprises a driving component 1, a driving component 2 and a driving component 3, wherein the driving component 1 is used to drive the wind cover (3) to reciprocate around the axis of the rotating shaft (12), the driving component 2 is used to drive the outer tube (42) to rotate around its own axis so that the cover mouth (31) is connected to the second air outlet (422) and is not connected to the first air outlet (421), and the driving component 3 is used to drive the air duct (4) to reciprocate along the axial direction of the rotating shaft (12).

2. A cooling device for a motor according to claim 1, characterized in that: The inner tube (41) is provided with a plurality of openings (411) capable of communicating with the first air port (421) or the second air port (422), the openings (411) comprising an end opening (411a) and a peripheral opening (411b), the end opening (411a) being located at an end of the inner tube (41) away from the fan (2), and the peripheral opening (411b) being arranged at intervals along the axial direction of the inner tube (41) on the peripheral side of the inner tube (41) and being located on the inner tube (41) near the rotating shaft. (12) on one side of the axis, air outlet one (421) includes an end air outlet (421a) matched with the end opening (411a), and a peripheral air outlet (421b) matched with the peripheral opening (411b), and air outlet two (422) is arranged on a side of the peripheral side of the outer tube (42) away from air outlet one (421), so that the projections of air outlet one (421) and air outlet two (422) in the axial direction of the outer tube (42) are symmetrical along the axis of the outer tube (42).

3. A cooling device for a motor according to claim 1, characterized in that: Each hood mouth (31) is conical, and its diameter gradually decreases along the direction from the fan (2) to the air duct (4).

4. A cooling device for a motor according to claim 1, characterized in that: The driving assembly 1 comprises a bevel gear 1 (51), a bevel gear 2 (52), a bevel gear 3 (53) and a bevel gear 4 (54). The bevel gear 1 (51) is fixedly connected to the rotating shaft (12), and the bevel gear 1 (51) is an incomplete gear. A fixing ring (14) connected to the bevel gear 1 (51) is provided in the housing (11). The bevel gear 2 (52) and the bevel gear 3 (53) are both rotatably arranged on the fixing ring (14). The bevel gear 2 (52) and the bevel gear 3 (53) are symmetrically arranged on both sides of the rotating shaft (12) and mesh with the bevel gear 1 (51) respectively. The bevel gear 4 (54) is fixedly connected to the wind cover (3) and meshes with the bevel gear 2 (52) and the bevel gear 3 (53).

5. A cooling device for a motor according to claim 1, characterized in that: The flow splitting assembly further comprises a telescopic tube (43) disposed between the wind hood (3) and the wind duct (4); one end of the telescopic tube (43) is connected to the hood mouth (31); the other end of the telescopic tube (43) is fixedly connected to the inner tube (41) and rotatably connected to the outer tube (42); a spring (44) is connected between the two ends of the telescopic tube (43).

6. A cooling device for a motor according to claim 5, characterized in that: The driving assembly 2 comprises a sleeve rod 1 (61), a sleeve rod 2 (62) and a driving structure. The sleeve rod 1 (61) and the sleeve rod 2 (62) are both provided in plurality and are respectively provided corresponding to the plurality of air ducts (4). The sleeve rod 1 (61) is rotatably sleeved on the outside of the telescopic tube (43), and the sleeve rod 2 (62) is rotatably sleeved on the outside of the sleeve rod 1 (61). A torsion spring (63) is connected between the sleeve rod 1 (61) and the sleeve rod 2 (62). A rod (621) is connected to the side of the sleeve rod 2 (62) facing the outer tube (42). A mounting ring (423) is provided on the outer side of the outer tube (42), and a through hole is provided on the mounting ring (423) through which the rod (621) passes, so that the outer tube (42) can slide with the rod (621) through the mounting ring (423) and the outer tube (42) can rotate synchronously with the sleeve rod 2 (62). The driving structure is used to drive the sleeve rod 1 (61) to rotate.

7. A cooling device for a motor according to claim 6, characterized in that: The driving structure comprises a connecting ring (64), an electric push rod (65) and a connecting rod (66); the connecting ring (64) is slidably matched with the wind cover (3) along the axial direction of the rotating shaft (12); the electric push rod (65) is arranged on the wind cover (3) and the output end is connected to the connecting ring (64); a plurality of connecting rods (66) are provided and are respectively arranged corresponding to a plurality of air ducts (4); a spiral groove (611) is provided on the circumferential side of the sleeve rod (61); one end of the connecting rod (66) is connected to the connecting ring (64), and the other end is slidably matched with the sleeve rod (61) via the spiral groove (611).

8. A cooling device for a motor according to claim 7, characterized in that: The projection of the spiral track of the spiral groove (611) in the axial direction of the sleeve rod (61) is in the shape of a semicircle, so that when the connecting rod (66) moves from one end of the spiral groove (611) to the other end of the spiral groove (611), the sleeve rod (61) rotates 180 degrees.

9. A cooling device for a motor according to claim 6, characterized in that: The driving component three comprises a driving member (71) and a plurality of protrusions (72); the driving member (71) is fixedly connected to the rotating shaft (12); a contact surface is formed at one end of the driving member (71) away from the fan (2); and the contact surface is wavy; the plurality of protrusions (72) are respectively and correspondingly arranged on mounting rings (423) arranged on the outer sides of the plurality of outer tubes (42); and the protrusions (72) can contact the contact surface on the driving member (71).

10. A cooling device for a motor according to claim 9, characterized in that: A ventilation hole (711) is provided on the side wall of the driving member (71).

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