Delayed heat dissipation motor capable of forming bidirectional air flow

Abstract

The application discloses a kind of delay heat dissipation type motor capable of forming two-way air flow, including motor shell and motor shaft, first heat dissipation channel is equipped in the two end surfaces of motor shaft, unidirectional transmission wheel is fixedly connected on the rear end of motor shaft, and wind collecting wheel is rotatably sleeved and slidably connected, outer heat dissipation blade is arranged on the outer circumferential surface of wind collecting wheel, and inner heat dissipation blade is arranged inside, outer heat dissipation blade is connected together with connecting ring connected in mounting ring fixed together with motor outer tube, the slot width of mounting ring slot is greater than the axial height of connecting ring to enable connecting ring to slide in mounting ring slot, reset spring is arranged in mounting ring slot to drive connecting ring to move to unidirectional transmission disc.The application has the advantages of smooth airflow in shaft part and delay heat dissipation, solves the problem of poor heat dissipation effect in existing motor shaft and inability to continue heat dissipation after shutdown.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a delayed-heating motor capable of generating bidirectional airflow. Background Technology

[0002] Heat dissipation is an important issue that needs to be considered when applying motors. Traditional methods of cooling the inside of motors are mostly achieved by opening air ducts in the stator yoke or the housing, which cannot achieve cooling inside the motor rotor.

[0003] Chinese patent application CN2023109361447, published on October 24, 2023, entitled "Electric Motor," includes a housing, a rotor mechanism, a stator mechanism, and a winding mechanism. The rotor mechanism is at least partially housed within the housing, comprising a shaft rotatably connected to the housing and a rotor mounted on the shaft. The stator mechanism is at least partially housed within the housing, fixedly connected to the housing, and at least partially surrounding the rotor mechanism. The winding mechanism is at least partially mounted on the stator mechanism. A first cooling duct is provided within the housing, communicating with the outside. A second cooling duct extends along the shaft axis within the shaft, with one end communicating with the outside. When the motor is operating, the first cooling duct delivers cooling air from the outside to the second cooling duct, and the cooling air, after passing through the second cooling duct, is then delivered to the outside from the end of the second cooling duct communicating with the outside. In other words, the internal channels of the motor shaft are used to dissipate heat from the inside of the motor.

[0004] The shortcomings of the existing technology are: the diameter of the motor shaft is usually small, the air duct inside the motor shaft is even narrower, and it is difficult for the external airflow to be transmitted into the air duct inside the motor shaft. Most of the airflow still flows through the outside of the motor, resulting in insufficient heat dissipation at the motor shaft; after the motor brakes and stops, the cooling fins immediately stop dissipating heat and cannot cool the stopped motor quickly. Summary of the Invention

[0005] The present invention aims to provide a delayed heat dissipation motor with smooth airflow in the shaft and the ability to form bidirectional airflow, which solves the problems of poor heat dissipation effect in the shaft of existing motors and the inability to continue heat dissipation after shutdown.

[0006] The above technical problems are solved by the following technical solution: a delayed-heating motor capable of forming bidirectional airflow, comprising a motor housing and a motor shaft rotating within the motor housing, a stator fixedly disposed within the motor housing, the motor housing comprising a tubular shell, a front end cover connected to one end of the tubular shell, and a rear end cover connected to the other end of the tubular shell, a rotor fixedly disposed on the motor shaft, the stator driving the rotor and motor shaft to rotate together when energized, both ends of the motor shaft extending outside the motor housing, and external heat dissipation blades connected to the rear end of the motor shaft, characterized in that a first heat dissipation channel extending axially along the motor shaft is provided inside the motor shaft, the first heat dissipation channel penetrating both end faces of the motor shaft, a fan wheel slidably and rotatably fitted on the rear end of the motor shaft, the external heat dissipation blades being connected to the outer circumferential surface of the fan wheel, and the fan wheel being provided with heat dissipation... The invention includes a through hole connecting the channels, an inner heat dissipation blade on the fan wheel, which generates airflow through the first heat dissipation channel when rotating. The outer heat dissipation blade is connected to the connecting ring. A one-way drive wheel is fixed to the rear end of the motor shaft. A mounting ring is located behind the rear end cover at the rear end of the motor housing. The inner circumference of the mounting ring has a mounting ring groove extending circumferentially along the motor shaft. The bottom of the mounting ring groove rotatably engages with the outer circumference of the connecting ring. The groove width is greater than the axial height of the connecting ring, allowing the connecting ring to slide within the groove. A return spring is located within the mounting ring groove, driving the connecting ring to move towards the one-way drive wheel, thus engaging the fan wheel with the drive wheel. When the one-way drive wheel rotates with the motor shaft, it drives the fan wheel to rotate synchronously. When the one-way drive wheel stops rotating and the fan wheel continues to rotate due to inertia, the fan wheel disengages from the one-way drive wheel. The motor disclosed in this invention, in addition to existing cooling fans, also incorporates inner heat dissipation blades to drive airflow through the first heat dissipation channel, thereby improving the internal heat dissipation capacity of the motor and ensuring reliable cooling. When the motor starts, the one-way drive wheel drives the air collecting ring to rotate. The rotation of the air collecting blades allows airflow to pass through the first heat dissipation channel and the outer heat dissipation blades for heat dissipation, ensuring motor cooling. When the motor stops, the air collecting ring overcomes the elastic force of the return spring under the action of inertia and disengages from the one-way drive wheel, thus continuing to rotate. This allows the air cooling to continue independently for a period of time after the motor brakes to stop, further improving the motor cooling effect.

[0007] Preferably, a second heat dissipation channel connecting both ends of the stator is provided on the stator or between the stator and the rotor; a front end cover has a vent that connects to the front end of the second heat dissipation channel; and a rear end cover has a vent that connects to the rear end of the second heat dissipation channel. This improves heat dissipation.

[0008] Preferably, the system also includes an isolation tube connected to the through hole. The isolation tube is fixed to the motor housing. The airflow generated by the rotating inner cooling blades passes through the isolation tube and blows towards the through hole to reach the first heat dissipation channel. The airflow generated by the outer cooling blades flows sequentially through the air holes in the front cover, the second heat dissipation channel, and the air holes in the rear cover. The isolation tube separates the airflow generated by the inner and outer cooling blades, preventing hot air from being drawn in and reducing the cooling effect. The suction method directs airflow through the second heat dissipation channel, improving the heat dissipation efficiency of the outer cooling blades.

[0009] Preferably, the isolation tube is tapered, with one end smaller than the other, connected to the through hole. This allows the airflow from the second heat dissipation channel to be further away from the center of the motor, and the exhausted airflow can form a jet of air on the periphery of the motor casing, thereby improving the heat dissipation effect.

[0010] Preferably, one end of the isolation pipe connected to the through pipe extends into the through hole, and the isolation pipe is rotatably connected to the fan impeller. This prevents airflow blowing into the first heat dissipation channel from leaking out from the connection point when it flows into the isolation pipe.

[0011] Preferably, the isolation tube is provided with connecting feet that are connected to the motor housing by fixing bolts, and the isolation tube is fixed to the motor housing by the connecting feet. This facilitates connection.

[0012] Preferably, the end of the through hole away from the heat dissipation channel has a conical section, with one end of the conical section connected to the heat dissipation channel being smaller than the other, and the inner heat dissipation blades located within the conical section. This achieves a concealed arrangement of the air-collecting blades within the fan wheel, improving the overall consistency of the motor.

[0013] Preferably, the unidirectional drive wheel has a plurality of protruding teeth arranged in a circular array around its axis on the side facing the collecting wheel. Each protruding tooth includes a transmission plane coplanar with the motor axis and an unlocking inclined surface intersecting the transmission plane. The collecting wheel has a mating structure on the side facing the unidirectional drive wheel that engages with the protruding teeth on the unidirectional drive wheel. When the unidirectional drive wheel rotates with the motor shaft, it transmits power through the transmission surface contacting the mating structure. When the unidirectional drive wheel stops rotating while the collecting wheel continues to rotate due to inertia, the collecting wheel contacts the unlocking inclined surface through the mating structure, causing the collecting wheel to disengage from the unidirectional drive wheel. This provides a specific technical solution where the unidirectional drive wheel can drive the collecting wheel when rotating, and disengage from the unidirectional drive wheel when the collecting wheel moves forward due to inertia.

[0014] Preferably, the mating structure is a toothed structure.

[0015] As another preferred embodiment, the mating structure is a groove.

[0016] The beneficial effects of this invention are: it can improve the internal heat dissipation capacity of the motor, and the cooling effect is reliable; the overall consistency of the motor is good; and it can continue to dissipate heat after shutdown. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A magnified view of a portion of point A; Figure 3 This is a rear view of a one-way drive wheel.

[0018] In the diagram: 1. Motor shaft; 2. Stator; 3. Tubular housing; 4. Front end cover; 5. Rear end cover; 6. Rotor; 7. Collector wheel; 8. External heat dissipation blades; 9. Connecting ring; 10. One-way transmission wheel; 11. Mounting ring; 12. Return spring; 13. Protruding tooth; 14. Transmission plane; 15. Unlocking ramp; 16. First heat dissipation channel; 17. Conical section; 18. Internal heat dissipation blades; 19. Second heat dissipation channel; 20. Front end cover vent; 21. Rear end cover vent; 22. Isolation tube; 23. Fixing bolt; 24. Connecting foot; 34. Through hole. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0020] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] See Figures 1 to 3A time-delayed cooling motor capable of generating bidirectional airflow includes a motor housing and a motor shaft 1 rotating within the motor housing. A stator 2 is fixedly mounted inside the motor housing. The motor housing includes a tubular shell 3, a front end cover 4 connected to one end of the tubular shell, and a rear end cover 5 connected to the other end of the tubular shell. A rotor 6 is fixedly mounted on the motor shaft. When the stator is energized, it drives the rotor and the motor shaft to rotate together. Both ends of the motor shaft extend outside the motor housing. A fan-collecting wheel 7 is slidably and rotatably fitted on the rear end of the motor shaft. External cooling blades 8 are connected to the fan-collecting wheel. The external cooling blades are connected within a connecting ring 9. A one-way drive wheel 10 is fixed to the rear end of the motor shaft. The one-way drive wheel is located between the fan-collecting wheel and the rear end cover. The rear end of the motor housing is provided with a mounting ring 11 located behind the rear end cover. The inner circumference of the mounting ring is provided with a mounting ring groove extending along the circumferential direction of the motor shaft. The bottom of the mounting ring groove is rotatably engaged with the outer circumference of the connecting ring. The width of the mounting ring groove (i.e., the dimension along the extension direction of the motor shaft) is greater than the axial height of the connecting ring so that the connecting ring can slide in the mounting ring groove. A return spring 12 is provided in the mounting ring groove to drive the connecting ring to move toward the one-way transmission wheel and mesh with the transmission wheel. When the one-way drive wheel rotates with the motor shaft, it can drive the collecting wheel to rotate synchronously. When the one-way drive wheel stops rotating and the collecting wheel rotates due to inertia, the collecting wheel disengages from the one-way drive wheel. Specifically, this is achieved through the following structure: the one-way drive wheel has a plurality of protruding teeth 13 arranged in a circular array around its axis on the side facing the collecting wheel. The protruding teeth include a transmission plane 14 coplanar with the motor axis and an unlocking inclined surface 15 intersecting the transmission plane. The collecting wheel has a mating structure on the side facing the one-way drive wheel that engages with the protruding teeth on the one-way drive wheel. In this embodiment, the mating structure is a groove, but protruding teeth are also possible. When the one-way drive wheel rotates with the motor shaft, it transmits power through the transmission surface contacting the mating structure. When the one-way drive wheel stops rotating and the collecting wheel rotates due to inertia, the collecting wheel disengages from the one-way drive wheel through the mating structure contacting the unlocking inclined surface.

[0022] The motor shaft has a first heat dissipation channel 16 extending axially along the motor shaft, passing through both ends of the motor shaft. The fan impeller has a through hole 34 that mates with the heat dissipation channel. A conical section 17 is located at the end of the through hole away from the heat dissipation channel, with the end of the conical section connected to the heat dissipation channel being smaller than the other end. Internal heat dissipation blades 18 are located within the conical section. During the movement of the fan impeller, the motor shaft remains on the side of the conical section facing the rear end cover.

[0023] A second heat dissipation channel 19 connecting both ends of the stator is provided on the stator or between the stator and rotor. A front cover has a front cover vent 20 connected to the front end of the second heat dissipation channel, and a rear cover has a rear cover vent 21 connected to the rear end of the second heat dissipation channel. It also includes an isolation tube 22 connected to the through hole. The isolation tube is fixed to the motor housing. Specifically, the isolation tube has connecting feet 24 connected to the motor housing by fixing bolts 23, and the isolation tube is fixed to the motor housing by the connecting feet. The airflow generated by the inner heat dissipation blades when rotating blows through the isolation tube towards the through hole to reach the first heat dissipation channel. The airflow generated by the outer heat dissipation blades flows sequentially through the front cover vent, the second heat dissipation channel, and the rear cover vent. The isolation tube separates the airflow generated by the inner and outer heat dissipation blades. The isolation tube is tapered, with one end smaller than the other end, connected to the through hole. The end of the isolation tube connected to the through tube extends into the through hole, and the isolation tube is connected to the fan wheel in a rotating and removable manner.

[0024] Initially, the air collecting ring and the one-way drive wheel are engaged under the action of the return spring. When the motor rotates, the drive shaft drives the extension section to rotate, causing the one-way drive wheel to rotate. The one-way drive wheel drives the air collecting ring to rotate through the drive surface, thereby generating airflow for heat dissipation from both the inner and outer heat dissipation blades. When the motor brakes and stops, the motor shaft stops rotating, causing the one-way drive wheel to stop as well. At this time, the air collecting ring continues to rotate due to inertia until the mating structure abuts against the unlocking ramp. Under the guidance of the unlocking ramp, the air collecting wheel overcomes the elastic force of the return spring and disengages from the one-way drive wheel, continuing to rotate, thus achieving heat dissipation delay. As the inertia of the air collecting wheel weakens, the return spring drives the air collecting wheel to re-engage with the one-way drive wheel so that the air collecting wheel can rotate with the motor shaft when the motor starts next time.

[0025] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. A time-delayed heat dissipation motor capable of generating bidirectional airflow, comprising a motor housing and a motor shaft rotating within the motor housing, a stator fixedly disposed within the motor housing, the motor housing comprising a tubular shell, a front end cover connected to one end of the tubular shell, and a rear end cover connected to the other end of the tubular shell, a rotor fixedly disposed on the motor shaft, the stator driving the rotor and the motor shaft to rotate together when energized, both ends of the motor shaft extending outside the motor housing, and external heat dissipation fins connected to the rear end of the motor shaft, characterized in that, The motor shaft has a first heat dissipation channel extending axially along the motor shaft, which passes through both ends of the motor shaft. A fan wheel is slidably and rotatably fitted onto the rear end of the motor shaft. Outer heat dissipation blades are connected to the outer circumferential surface of the fan wheel. The fan wheel has a through hole that mates with the heat dissipation channel. Inner heat dissipation blades are provided on the fan wheel; when the inner heat dissipation blades rotate, they generate airflow through the first heat dissipation channel. The outer heat dissipation blades are connected to a connecting ring. A one-way drive wheel is fixed to the rear end of the motor shaft. A mounting ring is located behind the rear end cover at the rear end of the motor housing. The inner circumference of the mounting ring has a mounting ring groove extending circumferentially along the motor shaft. The bottom of the mounting ring groove rotatably engages with the outer circumference of the connecting ring. The width of the mounting ring groove is greater than the axial height of the connecting ring so that the connecting ring can slide within the mounting ring groove. A return spring is provided in the mounting ring groove to drive the unidirectional transmission wheel to move, causing the collecting wheel to mesh with the transmission wheel. When the unidirectional transmission wheel rotates with the motor shaft, it can drive the collecting wheel to rotate synchronously. When the unidirectional transmission wheel stops rotating and the collecting wheel rotates due to inertia, the collecting wheel disengages from the unidirectional transmission wheel. The side of the unidirectional transmission wheel facing the collecting wheel has a plurality of protruding teeth arranged in a circular array around its axis. The protruding teeth include a transmission plane coplanar with the motor axis and an unlocking inclined surface intersecting the transmission plane. The side of the collecting wheel facing the unidirectional transmission wheel has a mating structure that engages with the protruding teeth on the unidirectional transmission wheel. When the unidirectional transmission wheel rotates with the motor shaft, it is transmitted through the transmission plane and the mating structure. When the unidirectional transmission wheel stops rotating and the collecting wheel rotates due to inertia, the collecting wheel is disengaged from the unidirectional transmission wheel through the mating structure and the unlocking inclined surface.

2. The delayed-heating motor capable of generating bidirectional airflow according to claim 1, characterized in that, A second heat dissipation channel connecting both ends of the stator is provided on the stator or between the stator and the rotor. A front end cover is provided with a front end cover vent that connects to the front end of the second heat dissipation channel, and a rear end cover is provided with a rear end cover vent that connects to the rear end of the second heat dissipation channel.

3. The delayed-heating motor capable of generating bidirectional airflow according to claim 2, characterized in that, It also includes an isolation tube connected to the through hole. The isolation tube is fixed to the motor housing. When the inner heat dissipation blades rotate, the air generated is blown through the inside of the isolation tube toward the through hole and reaches the first heat dissipation channel. The air generated by the outer heat dissipation blades flows sequentially through the air hole of the front cover, the second heat dissipation channel and the air hole of the rear cover. The isolation tube separates the air generated by the inner heat dissipation blades from the air generated by the outer heat dissipation blades.

4. The delayed-heating motor capable of generating bidirectional airflow according to claim 3, characterized in that, The isolation tube is a cone shape with one end smaller than the other, connected to the through hole.

5. The delayed-heating motor capable of generating bidirectional airflow according to claim 3 or 4, characterized in that, One end of the isolation pipe connected to the through pipe extends into the through hole, and the isolation pipe is rotatably connected to the wind collector wheel.

6. The delayed-heating motor capable of generating bidirectional airflow according to claim 3 or 4, characterized in that, The isolation tube is provided with a connecting foot that is connected to the motor housing by a fixing bolt, and the isolation tube is fixed to the motor housing by the connecting foot.

7. The delayed-heating motor capable of generating bidirectional airflow according to claim 1, 2, 3, or 4, characterized in that, The end of the through hole away from the heat dissipation channel is provided with a conical section. The end of the conical section connected to the heat dissipation channel is smaller and the other end is larger. The inner heat dissipation blade is located inside the conical section.

8. The delayed-heating motor capable of generating bidirectional airflow according to claim 1, 2, 3, or 4, characterized in that, The mating structure is a convex tooth.

9. The delayed-heating motor capable of generating bidirectional airflow according to claim 1, 2, 3, or 4, characterized in that, The mating structure is a groove.

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