A brushless motor's anti-throw package rotor structure

Abstract

The present invention discloses an anti-throw package rotor structure for a brushless motor, belonging to the technical field of anti-throw package rotor structures. An anti-throw package rotor structure for a brushless motor includes a structural main body, and the structural main body includes a rotating shaft and a rotor core arranged at the rotating shaft. The rotor core has a connecting portion that is in interference fit with the rotating shaft, and a plurality of winding portions that extend axially outward along the connecting portion. Chutes are provided at both ends of the winding portion in the axial direction of the rotating shaft, and heat dissipation members are detachably arranged in the chutes. Through the combined setting of the heat dissipation members and the protective members, the problem of rotor anti-throw package is solved, the dynamic balance of the rotor can be adjusted, the coil and the rotating shaft can be cooled, and the situation of restricting the output power of the motor is avoided. Through the setting of the protective members, the protection and limitation of the coil are realized, and the heat dissipation members are limited in the axial direction of the rotating shaft, effectively preventing the coil from loosening or being thrown out due to the centrifugal force during the high-speed rotation of the motor, and enhancing the reliability of the coil fixation.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-throwing package rotor structures, and specifically, to an anti-throwing package rotor structure for a brushless motor. Background Art

[0002] When the motor rotor rotates at a high speed, a great centrifugal force will be generated on the coils, permanent magnets, etc. on the surface of the rotor. The coil is the main component on the rotor, and various measures need to be taken to fix it reliably. Especially for high-speed motors, the fixation of the coil is very important. This requires a coil anti-throwing package structure with good strength, high reliability, easy manufacturing, and convenient installation and operation to fix the motor rotor coil to prevent the coil from loosening and throwing out during the high-speed rotation of the rotor.

[0003] At present, the traditional methods for preventing the throwing of the motor end include end binding and dipping for fixation, coil bracket auxiliary fixation, coil encapsulation, etc. The traditional anti-throwing package methods have poor coil heat dissipation. For high-power density motors with small volume space, the traditional methods have high temperature rise, which limits the output power of the motor. Summary of the Invention

[0004] The present invention provides an anti-throwing package rotor structure for a brushless motor, which can overcome certain or some defects of the prior art.

[0005] According to an anti-throwing package rotor structure for a brushless motor of the present invention, it includes a structural main body, the structural main body includes a rotating shaft and a rotor core arranged at the rotating shaft. The rotor core has a connecting portion that is in interference fit with the rotating shaft, and a plurality of winding portions that extend axially outward along the connecting portion. Both ends of the winding portion in the axial direction of the rotating shaft are provided with sliding grooves, and a heat dissipation member is detachably arranged in the sliding grooves, and a coil is wound outside the sliding grooves and the heat dissipation member;

[0006] A protective member is detachably arranged at the rotating shaft, and the protective member is used to form an abutment against the coil and limit the heat dissipation member.

[0007] Preferably, the heat dissipation member includes a housing, a plugging portion that is matched with the sliding groove is formed on the outer wall of the housing, an exhaust air channel is formed inside the housing along the height direction, first through openings that are communicated with the exhaust air channel are formed on both sides of the housing, and a plurality of first guiding plates that are arranged at equal intervals are formed on the inner wall of the first through opening.

[0008] Through the arrangement of the exhaust air channel and the first through opening, the heat dissipation member can effectively guide the air flow, increase the contact area between the air and the coil, thereby improving the heat dissipation efficiency. At the same time, with the arrangement of the first guiding plates, the air forms a vortex inside the exhaust air channel, further enhancing the heat dissipation effect.

[0009] Preferably, a first air inlet channel is formed between adjacent first guiding plates, and the first guiding plates are arranged to be inclined downward from the exhaust air channel to the first air inlet channel direction.

[0010] Guided by the first guide plate, air forms a vortex inside the heat sink. This flow pattern helps to carry away the heat generated by the coil more quickly, reducing the temperature of the coil and thus improving the operating stability and service life of the motor.

[0011] Preferably, a second through-hole communicating with the exhaust passage is formed on the side of the housing away from the plugging portion. A plurality of second guide plates are formed at equal intervals on the inner wall of the second through-hole. Grooves are formed along both sides of the second through-hole on the outer wall of the housing, and rubber pads are provided in the grooves.

[0012] Through the arrangement of the second through-hole and the second guide plates inside it, the heat at the coil and the rotating shaft can be discharged more smoothly in multiple directions through the heat sink, and a vortex is formed during the outflow process, improving the heat dissipation efficiency.

[0013] The setting of the rubber pad improves the connection stability between the heat sink and the coil.

[0014] Preferably, a second air inlet passage is formed between adjacent second guide plates. The second guide plates are arranged to slope downward from the exhaust passage towards the second air inlet passage.

[0015] Through the arrangement of the second air inlet passage and the second guide plates inside it, the air can form a more uniform diffusion when flowing out of the heat sink, increasing the flow rate of the hot air inside the heat sink and thus improving the heat dissipation efficiency.

[0016] Preferably, the protective member includes a balance ring that is interference-fitted with the rotating shaft. A ring groove is formed on the side of the balance ring away from the rotor core. A plurality of partition plates are formed along the circumference of the rotating shaft on the inner wall of the ring groove. A collection passage is formed between adjacent partition plates. An air outlet communicating with the collection passage is formed on the outer wall of the balance ring. The partition plates are inclined clockwise.

[0017] Through the setting of the balance ring, it helps to balance the centrifugal force generated during the operation of the motor, reduces vibration and noise, and improves the operating stability of the motor.

[0018] Preferably, a convex portion is formed on the side of the balance ring close to the rotor core. A concave portion for inserting the convex portion is formed at the connecting portion. A plurality of second threaded holes are formed at the concave portion; mounting holes are formed on the side walls of the collection passage close to the rotor core, and counterweight bolts detachably connected to the second threaded holes are provided at the mounting holes.

[0019] Through the setting of the concave portion, the balance ring can be accurately positioned on the connecting portion, avoiding errors and deviations during the installation process.

[0020] Preferably, a plurality of baffles corresponding to the winding part are formed at equal intervals in the circumferential direction of the rotating shaft on the outer wall of the balance ring. Through holes are formed at the baffles, and air guide plates are formed inside the through holes. The air guide plates are arranged in the same inclined direction as the partition plates.

[0021] Through the combined action of the baffles, through holes and air guide plates, air can flow evenly through the winding part, thereby improving the heat dissipation efficiency, increasing the contact area and contact rate between the coil and air, helping to reduce the temperature of the winding part and the coil, and extending the service life of the motor.

[0022] Preferably, a plug-in groove is formed on the side of the baffle close to the rotor core, and a positioning block matching the plug-in groove is formed on the outer wall of the housing.

[0023] Through the connection between the plug-in groove and the positioning block, the connection strength between the baffle and the housing is further improved, making the motor operate more stably during operation and reducing the risk of component loosening and damage caused by vibration.

[0024] Preferably, a fastening member is detachably provided at the baffle. First threaded holes are formed along both sides of the sliding groove of the winding part. The fastening member is used to penetrate the baffle and connect to the first threaded hole.

[0025] Through the matching setting of the fastening member and the first threaded hole, a firm connection between the baffle and the winding part is ensured. The detachable setting of the fastening member makes the installation and disassembly of the baffle more convenient.

[0026] The beneficial effects of the present invention are as follows:

[0027] Through the combined setting of the heat dissipation member and the protection member, the problem of the rotor preventing the throwing of the package is solved, the dynamic balance adjustment of the rotor can be carried out, the coil and the rotating shaft can be cooled, and the situation of restricting the output power of the motor is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an anti-throwing rotor structure of a brushless motor.

[0029] Figure 2 It is a schematic diagram of the rotor core structure of an anti-throwing rotor structure of a brushless motor.

[0030] Figure 3 It is a front view schematic diagram of the protection member of an anti-throwing rotor structure of a brushless motor.

[0031] Figure 4 It is a rear view schematic diagram of the protection member of an anti-throwing rotor structure of a brushless motor.

[0032] Figure 5 It is a front view schematic diagram of the heat dissipation member of an anti-throwing rotor structure of a brushless motor.

[0033] Figure 6 Schematic side view structure of the heat sink for a brushless motor's anti-throw package rotor structure

[0034] Figure 7 Schematic front view sectional structure of the heat sink for a brushless motor's anti-throw package rotor structure

[0035] Figure 8 Schematic side view sectional structure of the heat sink for a brushless motor's anti-throw package rotor structure

[0036] 100, Structural main body; 110, Rotating shaft; 120, Rotor core; 130, Heat sink; 140, Protective part; 210, Slide groove; 220, First threaded hole; 230, Coil; 240, Second threaded hole; 310, Balance ring; 320, Ring groove; 321, Partition plate; 322, Air outlet; 323, Mounting hole; 330, Baffle; 340, Through port; 350, Air guide plate; 360, Fastener; 410, Convex part; 420, Counterweight bolt; 430, Insertion slot; 510, Housing; 520, Exhaust passage; 530, First air inlet passage; 540, First guide plate; 550, Second air inlet passage; 560, Second guide plate; 570, Positioning block; 580, Rubber pad; 610, Insertion part. Detailed implementation mode

[0037] To further understand the content of the present invention, the present invention will be described in detail in combination with embodiments. It should be understood that the embodiments are only for explaining the present invention and not for limiting it.

[0038] Embodiment 1

[0039] Please refer to Figure 1-8 , this embodiment provides an anti-throw package rotor structure for a brushless motor, which includes a structural main body 100. The structural main body 100 includes a rotating shaft 110 and a rotor core 120 arranged at the rotating shaft 110. The rotor core 120 has a connecting part that is interference-fitted with the rotating shaft 110, and a plurality of winding parts that extend axially outward along the connecting part. Both ends of the winding parts in the axial direction of the rotating shaft 110 are provided with slide grooves 210. A heat sink 130 is detachably arranged in the slide grooves 210, and a coil 230 is wound outside the slide grooves 210 and the heat sink 130;

[0040] A protective part 140 is detachably arranged at the rotating shaft 110. The protective part 140 is used to form an abutment against the coil 230 and form a limit for the heat sink 130.

[0041] The anti-swing rotor structure of a brushless motor disclosed in the present invention solves the problem of anti-swing rotor through the coordinated arrangement of a heat sink 130 and a protective member 140, and can also perform rotor dynamic balance adjustment, and can also dissipate heat for the coil 230 and the shaft 110, thereby avoiding the situation of limiting the output power of the motor.

[0042] It can be understood that by setting the protective member 140, the protective limit of the coil 230 is achieved, and the heat sink 130 is limited along the axial direction of the rotating shaft 110, which effectively prevents the coil 230 from loosening or being thrown out due to centrifugal force when the motor rotates at high speed, thereby enhancing the reliability of the fixation of the coil 230.

[0043] It can be understood that the setting of the heat sink 130 not only serves as a supporting structure for the coil 230, but also plays a key role in heat dissipation. Through the contact between the heat sink 130 and the coil 230, the internal heat of the end coil 230 can be discharged through the heat sink 130, thereby improving the heat dissipation efficiency at the coil 230 and the shaft 110.

[0044] See Figure 2 and Figure 5 In this embodiment, the heat sink 130 includes a shell 510, and a plug-in portion 610 cooperating with the slide groove 210 is formed on the outer wall of the shell 510. An exhaust channel 520 is formed inside the shell 510 along the height direction. First through openings that penetrate the exhaust channel 520 are formed on both sides of the shell 510, and a plurality of first guide plates 540 arranged at equal intervals are formed on the inner wall of the first through opening.

[0045] Through the setting of the exhaust channel 520 and the first through-hole, the heat sink 130 can effectively guide the air flow, increase the contact area between the air and the coil 230, and thus improve the heat dissipation efficiency. At the same time, in conjunction with the setting of the first guide plate 540, the air forms a vortex inside the exhaust channel 520, further enhancing the heat dissipation effect.

[0046] See Figure Figure 5 In this embodiment, a first air inlet channel 530 is formed between adjacent first guide plates 540 , and the first guide plates 540 are arranged to be inclined downward from the exhaust channel 520 to the first air inlet channel 530 .

[0047] Guided by the first guide plate 540 , air forms a vortex inside the heat sink 130 . This flow pattern helps to take away the heat generated by the coil 230 more quickly, thereby reducing the temperature of the coil 230 and improving the operating stability and service life of the motor.

[0048] See Figure 5 , Figure 7 and Figure 8, in this embodiment, a second through-hole communicating with the exhaust passage 520 is formed on the side of the housing 510 away from the insertion portion 610. A plurality of second guide plates 560 arranged at equal intervals are formed on the inner wall of the second through-hole. Grooves are formed on both sides of the second through-hole along the outer wall of the housing 510, and rubber pads 580 are provided in the grooves.

[0049] Through the arrangement of the second through-hole and the second guide plates 560 therein, the heat at the coil 230 and the rotating shaft 110 can be discharged more smoothly in multiple directions through the heat dissipation member 130, and eddy currents are formed during the outflow process, improving the heat dissipation efficiency.

[0050] The arrangement of the rubber pads 580 improves the connection stability between the heat dissipation member 130 and the coil 230.

[0051] As shown in Figure 5 、 Figure 7 and Figure 8 , in this embodiment, a second air inlet passage 550 is formed between adjacent second guide plates 560, and the second guide plates 560 are arranged to incline downward from the exhaust passage 520 towards the second air inlet passage 550.

[0052] Through the arrangement of the second air inlet passage 550 and the second guide plates 560 therein, the air can form a more uniform diffusion when flowing out of the heat dissipation member 130, increasing the air flow rate inside the heat dissipation member 130, thereby improving the heat dissipation efficiency.

[0053] In addition, the volume of the second air inlet passage 550 is larger than that of the first air inlet passage 530, so that the air intake volume of the second air inlet passage 550 is larger than that of the first air inlet passage 530. Thus, when exhausting air from the second air inlet passage 550, the air flow rate of the first air inlet passage 530 can be accelerated, further improving the heat dissipation effect.

[0054] Embodiment 2

[0055] As shown in Figure 3 , this embodiment also provides an anti-throw package rotor structure of a brushless motor, which is different from that of Embodiment 1 in that: the protective member 140 includes a balance ring 310 that is in interference fit with the rotating shaft 110. A ring groove 320 is formed on the side of the balance ring 310 away from the rotor core 120. A plurality of partition plates 321 are formed on the inner wall of the ring groove 320 along the circumferential direction of the rotating shaft 110. A collection passage is formed between adjacent partition plates 321. An air outlet 322 communicating with the collection passage is formed on the outer wall of the balance ring 310, and the partition plates 321 are inclined clockwise.

[0056] Through the arrangement of the balance ring 310, it helps to balance the centrifugal force generated during the operation of the motor, reduces vibration and noise, and improves the operation stability of the motor.

[0057] It can be understood that the collection channels are arranged such that when the protective member 140 rotates, the heat generated at the rotating shaft 110 can be discharged externally, diffused outward through the air outlet 322, and further discharged in cooperation with the heat dissipation member 130, thereby reducing the heat at the rotating shaft 110. In addition, the air circulation at the rotating shaft 110 can also be improved, facilitating further heat dissipation by the heat dissipation member 130.

[0058] As seen in Figure 3 and Figure 4 , in this embodiment, a convex portion 410 is formed on the side of the balance ring 310 close to the rotor core 120, a concave portion for inserting the convex portion 410 is formed at the connecting portion, and a plurality of second threaded holes 240 are formed at the concave portion; mounting holes 323 are formed at the side walls of the collection channels close to the rotor core 120, and counterweight bolts 420 connected to the second threaded holes 240 are detachably provided at the mounting holes 323.

[0059] Through the setting of the concave portion, the balance ring 310 can be accurately positioned on the connecting portion, avoiding errors and deviations during the installation process.

[0060] It can be understood that the counterweight bolts 420 not only play a role in fixing the balance ring 310, but also optimize the balance performance of the motor through the adjustment of their weights and positions, reducing the vibration and noise during the operation of the motor.

[0061] In addition, by axially arranging on the balance ring 310, the radial centrifugal force generated during the high-speed rotation of the rotor can be effectively prevented from causing the loosening of the counterweight bolts 420, improving the stability and reliability, effectively enhancing the dynamic balance effect of the rotor, and enhancing the working stability of the motor.

[0062] As seen in Figure 3 , in this embodiment, a plurality of baffles 330 corresponding to the winding portion are formed at equal intervals in the circumferential direction of the rotating shaft 110 on the outer wall of the balance ring 310, through holes 340 are formed at the baffles 330, and air guide plates 350 are formed inside the through holes 340, and the air guide plates 350 are arranged in the same inclination direction as the partition plate 321.

[0063] Through the combined action of the baffles 330, the through holes 340 and the air guide plates 350, air can flow evenly through the winding portion, thereby improving the heat dissipation efficiency, increasing the contact area and contact rate between the coil 230 and the air, helping to reduce the temperature of the winding portion and the coil 230, and extending the service life of the motor.

[0064] It can be understood that the air guide plates 350 are arranged in the same inclination direction as the partition plate 321, enabling air to flow along a specific path, avoiding the problem of uneven heat dissipation caused by poor air flow, and helping to improve the overall heat dissipation performance of the motor.

[0065] As seen inFigure 4 and Figure 5 In this embodiment, a plug-in groove 430 is formed on one side of the baffle 330 close to the rotor core 120, and a positioning block 570 that cooperates with the plug-in groove 430 is formed on the outer wall of the housing 510.

[0066] Through the connection between the plug-in groove 430 and the positioning block 570, the connection strength between the baffle 330 and the housing 510 is further improved, making the motor operate more stably during operation and reducing the risk of component loosening and damage caused by vibration.

[0067] as seen in Figure 2 and Figure 3 In this embodiment, a fastener 360 is detachably provided at the baffle 330. First threaded holes 220 are formed along both sides of the sliding groove 210 in the winding part. The fastener 360 is used to penetrate the baffle 330 and connect to the first threaded holes 220.

[0068] Through the cooperative setting of the fastener 360 and the first threaded holes 220, a firm connection between the baffle 330 and the winding part is ensured. The detachable setting of the fastener 360 makes the installation and disassembly of the baffle 330 more convenient.

[0069] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on one or several embodiments provided by the present application to obtain other embodiments, and these embodiments do not exceed the protection scope of the present application.

[0070] The above schematically describes the present invention and its implementation manners. This description is not restrictive. What is shown in the embodiments is only part of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A brushless motor anti-throwing rotor structure, characterized in that: It includes a structural body (100), the structural body (100) includes a rotating shaft (110) and a rotor core (120) provided at the rotating shaft (110). The rotor core (120) has a connecting portion that is interference-fitted with the rotating shaft (110), and a plurality of winding portions that extend axially outward along the connecting portion. Both ends of the winding portion in the axial direction of the rotating shaft (110) are provided with sliding grooves (210), and a heat dissipation member (130) is detachably provided in the sliding grooves (210). A coil (230) is wound around the sliding grooves (210) and the heat dissipation member (130). A protective member (140) is detachably provided at the rotating shaft (110). The protective member (140) is used to abut against the coil (230) and limit the heat dissipation member (130). The heat dissipation member (130) includes a housing (510). A plug-in portion (610) that cooperates with the sliding groove (210) is formed on the outer wall of the housing (510). An exhaust air channel (520) is formed inside the housing (510) in the height direction. First through holes that communicate with the exhaust air channel (520) are formed on both sides of the housing (510). A plurality of first guide plates (540) arranged at equal intervals are formed on the inner wall of the first through hole. The protective member (140) includes a balance ring (310) that is interference-fitted with the rotating shaft (110). A ring groove (320) is formed on the side of the balance ring (310) away from the rotor core (120). A plurality of partition plates (321) are formed on the inner wall of the ring groove (320) along the circumferential direction of the rotating shaft (110). A collection channel is formed between adjacent partition plates (321). An air outlet (322) that communicates with the collection channel is formed on the outer wall of the balance ring (310). The partition plates (321) are inclined clockwise.

2. The anti-throw package rotor structure of a brushless motor according to claim 1, characterized in that: A first air inlet channel (530) is formed between adjacent first guide plates (540). The first guide plates (540) are inclined downward from the exhaust air channel (520) to the first air inlet channel (530).

3. The anti-throw package rotor structure of a brushless motor according to claim 1, characterized in that: A second through hole that communicates with the exhaust air channel (520) is formed on the side of the housing (510) away from the plug-in portion (610). A plurality of second guide plates (560) arranged at equal intervals are formed on the inner wall of the second through hole. Grooves are formed on both sides of the outer wall of the housing (510) along the second through hole, and rubber pads (580) are provided in the grooves.

4. A brushless motor anti-throw package rotor structure according to claim 3, characterized in that: A second air inlet channel (550) is formed between adjacent second guide plates (560). The second guide plates (560) are inclined downward from the exhaust air channel (520) to the second air inlet channel (550).

5. The anti-throw package rotor structure of a brushless motor according to claim 1, characterized in that: A convex portion (410) is formed on the side of the balance ring (310) close to the rotor core (120). A concave portion for the convex portion (410) to be inserted is formed at the connecting portion, and a plurality of second threaded holes (240) are formed at the concave portion. Mounting holes (323) are formed on the side walls of the collection channels close to the rotor core (120). A counterweight bolt (420) that is detachably connected to the second threaded hole (240) is provided at the mounting hole (323).

6. The anti-throw package rotor structure of a brushless motor according to claim 5, characterized in that: A plurality of baffles (330) corresponding to the winding portion are formed at equal intervals in the circumferential direction of the rotating shaft (110) on the outer wall of the balance ring (310). A through port (340) is formed at the baffle (330), and a wind guide plate (350) is formed inside each through port (340). The wind guide plate (350) is arranged in the same inclination direction as the partition plate (321).

7. The anti-throw package rotor structure of a brushless motor according to claim 6, characterized in that: A plug-in groove (430) is formed on the side of the baffle (330) close to the rotor core (120), and a positioning block (570) matching the plug-in groove (430) is formed on the outer wall of the housing (510).

8. The anti-throw-off rotor structure of a brushless motor according to claim 7, characterized in that: A fastener (360) is detachably provided at the baffle (330). First threaded holes (220) are formed on both sides of the winding portion along the sliding groove (210). The fastener (360) is used to penetrate the baffle (330) and connect to the first threaded hole (220).

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