Anti-bag-throwing rotor structure of brushless motor

Abstract

The invention discloses an anti-package-throwing rotor structure of a brushless motor, and belongs to the technical field of anti-package-throwing rotor structures. An anti-package-throwing rotor structure of a brushless motor comprises a structure body, the structure body comprises a rotating shaft and a rotor core arranged at the rotating shaft, the rotor core is provided with a connecting part in interference fit with the rotating shaft and a plurality of winding parts extending outwards in the axial direction of the connecting part, and sliding grooves are formed in the two ends, in the axial direction of the rotating shaft, of the winding parts. A heat dissipation piece is detachably arranged in the sliding groove. Through the cooperative arrangement of the heat dissipation piece and the protection piece, the problem of preventing the rotor from bag throwing is solved, dynamic balance adjustment of the rotor can be carried out, heat dissipation can be carried out on the coil and the rotating shaft, and the situation that the output power of the motor is limited is avoided. Through the arrangement of the protection piece, protection and limiting of the coil are achieved, the heat dissipation piece is limited in the axial direction of the rotating shaft, the situation that the coil is loosened or thrown out due to the centrifugal force effect when the motor rotates at a high speed is effectively prevented, and the reliability of coil fixing is enhanced.

Description

Technical Field

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

[0002] When the motor rotor rotates at high speed, a large centrifugal force will be generated on the coils and magnets on the rotor surface. The coil is the main part of the rotor and needs to be reliably fixed by various measures. Especially for high-speed motors, the fixation of the coil is very important. This requires a coil anti-throwing bag 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 being thrown out during the high-speed rotation of the rotor.

[0003] At present, the traditional methods of preventing the motor end from being thrown away include end binding and paint fixation, coil bracket auxiliary fixation, coil packaging, etc. The traditional anti-throwing method has poor coil heat dissipation. For high-power density motors with small volume space, the traditional method increases the temperature rise, limiting the output power of the motor. Summary of the invention

[0004] The invention provides an anti-throw-off rotor structure of a brushless motor, which can overcome certain defects of the prior art.

[0005] According to the present invention, a brushless motor anti-swinging rotor structure comprises a structural body, the structural body comprises a rotating shaft and a rotor core arranged at the rotating shaft, the rotor core comprises a connecting portion with an interference fit with the rotating shaft, and a plurality of winding portions extending outwardly along the axial direction of the connecting portion, a slide groove is arranged at both ends of the winding portion along the axial direction of the rotating shaft, a heat sink is detachably arranged in the slide groove, and a coil is wound around the outside of the slide groove and the heat sink;

[0006] A protective piece is detachably provided at the rotating shaft, and the protective piece is used to abut against the coil and limit the heat sink.

[0007] Preferably, the heat sink includes a shell, an outer wall of the shell is formed with a plug-in portion that cooperates with the slide groove, an exhaust channel is formed inside the shell along the height direction, first through openings that penetrate the exhaust channel are formed on both sides of the shell, and a plurality of first guide plates arranged at equal intervals are formed on the inner wall of the first through opening.

[0008] Through the setting of the exhaust channel and the first through-hole, the heat sink can effectively guide the air flow, increase the contact area between the air and the coil, and thus improve the heat dissipation efficiency. At the same time, in conjunction with the setting of the first guide plate, the air forms a vortex inside the exhaust channel, further enhancing the heat dissipation effect.

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

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

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

[0012] By providing the second through-hole and the second guide plate therein, the heat from the coil and the rotating shaft can be discharged more smoothly in multiple directions through the heat sink, and eddy currents are formed during the outflow process, thereby improving the heat dissipation efficiency.

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

[0014] Preferably, a second air inlet channel is formed between adjacent second guide plates, and the second guide plates are arranged to be inclined downward from the exhaust channel toward the second air inlet channel.

[0015] By providing the second air inlet channel and the second guide plate therein, the air can be diffused more evenly when flowing out of the heat sink, thereby increasing the flow rate of hot air inside the heat sink and improving the heat dissipation efficiency.

[0016] Preferably, the protective member includes a balancing ring that has an interference fit with the rotating shaft, a ring groove is formed on the side of the balancing ring away from the rotor core, a plurality of partition plates are formed on the inner wall of the ring groove along the circumference of the rotating shaft, a collecting channel is formed between adjacent partition plates, an air outlet that passes through the collecting channel is formed on the outer wall of the balancing ring, and the partition plates are inclined clockwise.

[0017] The setting of the balance ring helps to balance the centrifugal force generated when the motor is running, reduce vibration and noise, and improve the running stability of the motor.

[0018] Preferably, a bulge is formed at one side of the balance ring close to the rotor core, a recess for the bulge to be inserted is formed at the connecting portion, and a plurality of second threaded holes are formed at the recess; mounting holes are formed at the collecting channels close to the side walls of the rotor core, and a counterweight bolt removably connected to the second threaded hole is provided at the mounting hole.

[0019] By providing the recessed portion, the balancing ring can be accurately positioned on the connecting portion, thereby avoiding errors and deviations during the installation process.

[0020] Preferably, a plurality of baffles corresponding to the winding parts are formed at equal intervals on the outer wall of the balance ring along the circumference of the rotating shaft, and a through opening is formed on the baffle, and an air guide plate is formed inside the through opening, and the air guide plate and the partition plate are arranged in the same inclination direction.

[0021] Through the combined action of the baffle, the opening and the air guide plate, 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 the 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 slot is formed on one side of the baffle plate close to the rotor core, and a positioning block matching the plug-in slot is formed on the outer wall of the shell.

[0023] Through the connection between the plug slot and the positioning block, the connection strength between the baffle and the housing is further improved, making the motor more stable during operation and reducing the risk of loosening and damage of components due to vibration.

[0024] Preferably, a fastener is detachably provided at the baffle, and first threaded holes are formed on both sides of the winding portion along the slide groove, and the fastener is used to penetrate the baffle and connect to the first threaded hole.

[0025] The cooperation between the fastener and the first threaded hole ensures a stable connection between the baffle and the winding portion, and the detachable arrangement of the fastener makes the installation and removal of the baffle more convenient.

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

[0027] By coordinating the heat sink and the protective element, the problem of preventing the rotor from being thrown off is solved, the dynamic balance of the rotor can be adjusted, and the coil and the shaft can be cooled, thus avoiding the situation of limiting the output power of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0029] Figure 2 The present invention is a schematic diagram of the rotor core structure of an anti-throwaway rotor structure of a brushless motor.

[0030] Figure 3 The present invention is a schematic diagram of the front view structure of a protective member of a brushless motor's anti-rotor swinging structure.

[0031] Figure 4 The figure is a schematic diagram of the rear view structure of a protective part of a brushless motor's anti-rotor swinging structure.

[0032] Figure 5 The figure is a schematic diagram of the front view of the heat sink of the anti-throw-off rotor structure of a brushless motor.

[0033] Figure 6 The figure is a schematic diagram of the side view of the heat sink of the anti-rotor structure of a brushless motor.

[0034] Figure 7 The present invention is a schematic diagram of the front cross-sectional structure of a heat sink of a brushless motor with an anti-throw-off rotor structure.

[0035] Figure 8 The figure is a schematic diagram of the side cross-sectional structure of a heat sink of a brushless motor's anti-rotor structure.

[0036] 100, structural body; 110, rotating shaft; 120, rotor core; 130, heat sink; 140, protective member; 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 hole; 350, air guide plate; 360, fastener; 410, convex part; 420, counterweight bolt; 430, plug-in groove; 510, shell; 520, exhaust channel; 530, first air inlet channel; 540, first guide plate; 550, second air inlet channel; 560, second guide plate; 570, positioning block; 580, rubber pad; 610, plug-in part. DETAILED DESCRIPTION

[0037] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0038] Example 1

[0039] See also Figure 1-8 The present embodiment provides a brushless motor anti-swinging rotor structure, which includes a structural body 100, the structural 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 portion with an interference fit with the rotating shaft 110, and a plurality of winding portions extending outward along the axial direction of the connecting portion, and both ends of the winding portion along the axial direction of the rotating shaft 110 are provided with a slide groove 210, a heat sink 130 is detachably provided in the slide groove 210, and a coil 230 is wound around the outside of the slide groove 210 and the heat sink 130;

[0040] 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 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 8In this embodiment, a second through opening communicating with the exhaust passage 520 is formed on the shell 510 and the side away from the plug-in portion 610, and a plurality of second guide plates 560 arranged at equal intervals are formed on the inner wall of the second through opening. Grooves are formed on the outer wall of the shell 510 along both sides of the second through opening, and rubber pads 580 are provided in the grooves.

[0049] By providing the second through-hole and the second guide plate 560 therein, the heat from the coil 230 and the rotating shaft 110 can be discharged more smoothly in multiple directions through the heat sink 130 , and eddy currents are formed during the outflow process, thereby improving the heat dissipation efficiency.

[0050] The provision of the rubber pad 580 improves the connection stability between the heat sink 130 and the coil 230 .

[0051] See Figure 5 , Figure 7 and Figure 8 In this embodiment, a second air inlet channel 550 is formed between adjacent second guide plates 560 , and the second guide plates 560 are arranged to be inclined downward from the exhaust channel 520 to the second air inlet channel 550 .

[0052] By providing the second air inlet channel 550 and the second guide plate 560 therein, the air can be diffused more evenly when flowing out of the heat sink 130, thereby increasing the flow of hot air inside the heat sink 130 and improving the heat dissipation efficiency.

[0053] In addition, the volume of the second air inlet channel 550 is greater than the volume of the first air inlet channel 530, so that the air intake volume of the second air inlet channel 550 is greater than the air intake volume of the first air inlet channel 530. Therefore, when the second air inlet channel 550 is exhausted, the air flow rate of the first air inlet channel 530 can be accelerated, thereby improving the heat dissipation effect.

[0054] Example 2

[0055] See Figure 3 This embodiment also provides an anti-bag-swinging rotor structure of a brushless motor, which differs from Embodiment 1 in that: the protective member 140 includes a balance ring 310 that is interference fit with the rotating shaft 110, and 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 circumference of the rotating shaft 110, and a collecting channel is formed between adjacent partition plates 321. An air outlet 322 that penetrates the collecting channel is formed on the outer wall of the balance ring 310, and the partition plates 321 are inclined clockwise.

[0056] The arrangement of the balance ring 310 helps to balance the centrifugal force generated when the motor is running, reduces vibration and noise, and improves the running stability of the motor.

[0057] It can be understood that the setting of the collection channel allows the protective member 140 to discharge the heat generated at the shaft 110 when it rotates, and diffuse it outward through the air outlet 322, while cooperating with the heat sink 130 for further discharge, thereby reducing the heat at the shaft 110. In addition, it can also improve the air flow at the shaft 110, which is convenient for the heat sink 130 to further dissipate heat.

[0058] See Figure 3 and Figure 4 In this embodiment, a convex portion 410 is formed at the balance ring 310 near 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 at the side walls of the collecting channel near the rotor core 120, and a counterweight bolt 420 detachably connected to the second threaded hole 240 is provided at the mounting hole 323.

[0059] By providing the recessed portion, the balance ring 310 can be accurately positioned on the connecting portion, thereby avoiding errors and deviations during the installation process.

[0060] It can be understood that the counterweight bolt 420 not only fixes the balance ring 310, but also optimizes the balance performance of the motor and reduces the vibration and noise when the motor is running through its weight and position adjustment.

[0061] In addition, by axially setting on the balance ring 310, the radial centrifugal force generated when the rotor rotates at high speed can be effectively prevented from causing the counterweight bolt 420 to loosen, thereby improving stability and reliability, effectively improving the dynamic balancing effect of the rotor, and improving the working stability of the motor.

[0062] See Figure 3 In this embodiment, a plurality of baffles 330 corresponding to the winding portion are formed at equal intervals along the circumference of the rotating shaft 110 on the outer wall of the balance ring 310, and a through opening 340 is formed at the baffle 330. An air guide plate 350 is formed inside the through opening 340. The air guide plate 350 is arranged in the same inclination direction as the partition plate 321.

[0063] Through the joint action of the baffle 330, the opening 340 and the air guide plate 350, air can flow through the winding part evenly, 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 part and the coil 230, and extending the service life of the motor.

[0064] It can be understood that the air guide plate 350 and the partition plate 321 are arranged with the same inclination direction, so that the air can 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] See Figure 4 and Figure 5 In this embodiment, a plug-in slot 430 is formed on the baffle 330 near the rotor core 120 , and a positioning block 570 that cooperates with the plug-in slot 430 is formed on the outer wall of the housing 510 .

[0066] Through the connection between the insertion slot 430 and the positioning block 570, the connection strength between the baffle 330 and the housing 510 is further improved, making the motor more stable during operation and reducing the risk of loosening and damage of components due to vibration.

[0067] See Figure 2 and Figure 3 In this embodiment, a fastener 360 is detachably provided at the baffle 330 , and a first threaded hole 220 is formed along both sides of the winding portion along the slide groove 210 , and the fastener 360 is used to penetrate the baffle 330 and connect to the first threaded hole 220 .

[0068] The cooperation between the fastener 360 and the first threaded hole 220 ensures a stable connection between the baffle 330 and the winding portion. The detachable arrangement of the fastener 360 makes the installation and removal 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 to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0070] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the 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: The invention comprises a structural body (100), wherein the structural body (100) comprises a rotating shaft (110) and a rotor core (120) arranged at the rotating shaft (110), wherein the rotor core (120) comprises a connection portion which is interference-fitted with the rotating shaft (110), and a plurality of winding portions extending outwardly along the axial direction of the connection portion, wherein both ends of the winding portions along the axial direction of the rotating shaft (110) are provided with a slide groove (210), a heat sink (130) is detachably arranged in the slide groove (210), and a coil (230) is wound around the outside of the slide groove (210) and the heat sink (130); A protective member (140) is detachably provided at the rotating shaft (110), and the protective member (140) is used to abut against the coil (230) and to limit the heat sink (130).

2. The anti-throw-off rotor structure of a brushless motor according to claim 1, characterized in that: The heat sink (130) includes a shell (510), an inserting portion (610) that cooperates with the slide groove (210) is formed on the outer wall of the shell (510), an exhaust passage (520) is formed inside the shell (510) along the height direction, first through openings that penetrate the exhaust passage (520) are formed on both sides of the shell (510), and a plurality of first guide plates (540) that are arranged at equal intervals are formed on the inner wall of the first through opening.

3. The anti-throw-off rotor structure of a brushless motor according to claim 2, characterized in that: 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) toward the first air inlet channel (530).

4. The anti-throw-off rotor structure of a brushless motor according to claim 2, characterized in that: A second through hole that is connected to the exhaust passage (520) is formed on the shell (510) and on the side away from the plug-in portion (610), and 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 the outer wall of the shell (510) along both sides of the second through hole, and rubber pads (580) are provided in the grooves.

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

6. The anti-throw-off rotor structure of a brushless motor according to claim 1, characterized in that: The protective member (140) comprises a balancing ring (310) which is interference-fitted with the rotating shaft (110); a ring groove (320) is formed on the side of the balancing 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 circumference of the rotating shaft (110); a collecting channel is formed between adjacent partition plates (321); an air outlet (322) which is connected to the collecting channel is formed on the outer wall of the balancing ring (310); and the partition plates (321) are inclined clockwise.

7. The anti-throw-off rotor structure of a brushless motor according to claim 6, characterized in that: A convex portion (410) is formed on one 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 connection portion, and a plurality of second threaded holes (240) are formed at the concave portion; and mounting holes (323) are formed at the side wall of the collecting channel close to the rotor core (120), and a counterweight bolt (420) connected to the second threaded hole (240) is detachably provided at the mounting hole (323).

8. The anti-throw-off rotor structure of a brushless motor according to claim 7, characterized in that: A plurality of baffles (330) corresponding to the winding portion are formed at equal intervals on the outer wall of the balance ring (310) along the circumferential direction of the rotating shaft (110), a through opening (340) is formed on the baffle (330), and an air guide plate (350) is formed inside the through opening (340), and the air guide plate (350) and the partition plate (321) are arranged in the same inclination direction.

9. The anti-throw-off rotor structure of a brushless motor according to claim 8, characterized in that: A plug-in slot (430) is formed on one side of the baffle (330) close to the rotor core (120), and a positioning block (570) matched with the plug-in slot (430) is formed on the outer wall of the housing (510).

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

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