CN214707408U - Structure for improving reduction ratio of outer rotor motor - Google Patents

Structure for improving reduction ratio of outer rotor motor Download PDF

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Publication number
CN214707408U
CN214707408U CN202120983481.8U CN202120983481U CN214707408U CN 214707408 U CN214707408 U CN 214707408U CN 202120983481 U CN202120983481 U CN 202120983481U CN 214707408 U CN214707408 U CN 214707408U
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reduction ratio
sun wheel
matching part
diameter
rod
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CN202120983481.8U
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Chinese (zh)
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康献兵
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Suzhou Moteng Electronic Technology Co Ltd
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Suzhou Moteng Electronic Technology Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

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Abstract

The utility model relates to a structure for improving the reduction ratio of an external rotor motor, which adopts a split type main shaft, wherein the split type main shaft comprises a left shaft rod, a right shaft rod and a sun wheel matching part, a sun wheel is sleeved outside the sun wheel matching part, the sun wheel matching part is arranged on the left shaft rod, and the diameter of the sun wheel matching part is smaller than the main diameter of the left shaft rod; or the sun wheel matching part is arranged on the right axle rod, and the diameter of the sun wheel matching part is smaller than the diameter of the main body of the right axle rod. The utility model discloses the main shaft adopts split type main shaft, is guaranteeing main shaft and bicycle equipment connecting axle diameter
Figure DDA0003058158570000011
Under the unchangeable condition, furthest's reduction sun gear's diameter for the number of teeth of sun gear reduces, increases the speed reduction ratio of gear, and then increases the output torque of motor.

Description

Structure for improving reduction ratio of outer rotor motor
Technical Field
The utility model relates to a motor field of helping hand electric motor car, concretely relates to improve structure of external rotor electric machine speed reduction ratio.
Background
Motor collar of power-assisted electric vehicleIn the field, the spindle of the conventional external rotor motor is an integrated spindle, as shown in fig. 1 and 2, the diameters of the spindle of the motor and the bicycle assembly connecting shaft are generally equal
Figure BDA0003058158550000011
Therefore, the diameter of the inner aperture of the sun gear must be larger than that of the inner aperture of the sun gear
Figure BDA0003058158550000012
Is usually that
Figure BDA0003058158550000013
It is also determined that the outer diameter of the sun gear is minimized during design
Figure BDA0003058158550000014
Because the sun gear is bigger than normal, the number of teeth of the sun gear is bigger than normal, and under the condition that the diameter of the main shell of the motor is not changed, the rotating speed ratio of the motor contrast is reduced, and the torque output by the motor is smaller.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an improve structure of external rotor electric machine speed reduction ratio.
The utility model discloses a following technical scheme realizes above-mentioned purpose: a structure for improving the reduction ratio of an outer rotor motor adopts a split type main shaft, the split type main shaft comprises a left shaft rod, a right shaft rod and a sun wheel matching part, a sun wheel is sleeved outside the sun wheel matching part, the sun wheel matching part is arranged on the left shaft rod, and the diameter of the sun wheel matching part is smaller than the main diameter of the left shaft rod; or the sun wheel matching part is arranged on the right axle rod, and the diameter of the sun wheel matching part is smaller than the diameter of the main body of the right axle rod.
Furthermore, the right shaft rod is provided with a right shaft rod flange connecting part or a sub-connecting part is arranged at a certain part of the shaft rod and can be directly and fixedly connected with the stator assembly through a rotation stopping key pin.
Furthermore, the end part of the right shaft rod is provided with a positioning groove, and the end part of the left shaft rod is provided with a positioning part which can be inserted into the positioning groove.
Furthermore, the structure for improving the reduction ratio of the outer rotor motor further comprises a hub motor shell and a hub end cover, wherein the hub motor shell is connected with the hub end cover.
Furthermore, an inner gear ring and a clutch are arranged in the hub motor shell, the clutch is mounted on the left shaft rod, the clutch is provided with a planetary gear, and the inner gear ring is meshed with the sun gear and is connected with the planetary gear of the clutch.
Further, the structure for improving the reduction ratio of the outer rotor motor further comprises a motor rotor assembly and a motor stator assembly, and the motor stator assembly is located inside the motor rotor assembly.
Further, the motor stator assembly is installed on the flange connecting part of the right shaft rod.
Compared with the prior art, the utility model provides the beneficial effect who improves external rotor electric machine speed reduction ratio's structure is: the main shaft adopts split type main shaft, under the unchangeable circumstances of assurance main shaft and bicycle equipment connecting axle diameter, furthest's reduction sun gear's diameter for the number of teeth of sun gear reduces, increases the speed reduction ratio of gear, and then increases the output torque of motor.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a conventional external rotor motor.
Fig. 2 is a schematic structural view of an integrated main shaft of a conventional external rotor motor.
Fig. 3 is a schematic perspective view of the present invention.
Fig. 4 is a schematic sectional structure of the present invention.
Fig. 5 is a schematic diagram of the explosion structure of the present invention.
Fig. 6 is a perspective view of the split spindle.
Fig. 7 is a perspective view of the sun gear.
Fig. 8 is a schematic structural view of another connection mode of the left axle stick and the right axle stick.
The numbers in the figures are as follows:
1. a hub motor housing;
2. an inner gear ring;
31. a left shaft roller bearing;
32. a planetary gear bearing;
33. a right shaft roller bearing;
4. a clutch;
5. a screw;
6. a planetary gear;
7. a motor output line;
9. a left shaft rod;
91. positioning a groove;
10. a right shaft rod;
101. a sun gear fitting section;
102. a right shaft rod flange connecting part;
103. a positioning part;
12. a sun gear;
13. a motor rotor assembly;
15. a motor stator assembly;
16. a tower footing sensor;
17. and a hub end cover.
Detailed Description
Referring to fig. 3 to 8, a structure for increasing the reduction ratio of an outer rotor motor adopts a split spindle, the split spindle includes a left shaft rod 9 and a right shaft rod 10, the right shaft rod 10 is provided with a sun gear matching portion 101 and a right shaft rod flange connecting portion 102; the sun gear 12 is sleeved outside the sun gear matching part 101; the diameter of the sun gear fitting part 101 is smaller than the diameter of the main body of the right stick 10. The diameter of the sun gear fitting portion 101 is 7 mm. There are multiple connected modes for left axle rod and right axle rod, and what demonstrate in this embodiment is that the tip of left axle rod 9 is equipped with constant head tank 91, and the tip of right axle rod 10 is equipped with the location portion 103 that can insert the constant head tank.
The left and right sticks may be connected in another way, as shown in fig. 8. The sun wheel matching part is arranged on the left shaft rod, and the diameter of the sun wheel matching part is smaller than the diameter of the main body of the left shaft rod. The end part of the right shaft rod is provided with a positioning groove, and the end part of the left shaft rod is provided with a positioning part which can be inserted into the positioning groove.
The structure for improving the reduction ratio of the outer rotor motor further comprises a hub motor shell 1 and a hub end cover 17, wherein the hub motor shell 1 is connected with the hub end cover 17, the hub end cover 17 is connected with a tower footing sensor 16 through a screw 5, and the tower footing sensor 16 is electrically connected with a motor output line 7.
An inner gear ring 2 and a clutch 4 are arranged in a hub motor shell 1, the clutch 4 is installed on a left shaft rod, the clutch 4 is provided with three planetary gears 6, the three planetary gears 6 are connected with the clutch through planetary gear bearings 32, and the inner gear ring is meshed with a sun gear and is connected with the planetary gears of the clutch. A left shaft rod bearing 31 is sleeved between the hub motor shell 1 and the left shaft rod 9.
The utility model provides a structure of improving external rotor electric machine speed reduction ratio still includes motor rotor subassembly 13 and motor stator subassembly 15, and motor stator subassembly 15 is basically that silicon steel sheet twines multiunit enameled wire and forms, and motor rotor group 13 is rotor shell and the combination of multi-disc magnetic steel piece basically and forms, and motor stator subassembly 15 is located motor rotor subassembly 13's inside, and motor stator subassembly 15 installs on right axle rod flange joint portion 102. A right shaft roller bearing 33 is sleeved between the motor rotor assembly 13 and the right shaft roller 10.
The utility model discloses a main shaft adopts split type main shaft, is guaranteeing main shaft and bicycle equipment connecting axle diameter
Figure BDA0003058158550000031
Under the unchangeable condition of 12.0mm, furthest's reduction sun gear's diameter for the number of teeth of sun gear reduces, increases the speed reduction ratio of gear, and then increases the output of motor.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (8)

1. The utility model provides an improve structure of external rotor electric machine speed reduction ratio which characterized in that: the split type main shaft is adopted and comprises a left shaft rod, a right shaft rod and a sun wheel matching part, a sun wheel is sleeved outside the sun wheel matching part, the sun wheel matching part is arranged on the left shaft rod, and the diameter of the sun wheel matching part is smaller than the main body diameter of the left shaft rod; or the sun wheel matching part is arranged on the right axle rod, and the diameter of the sun wheel matching part is smaller than the diameter of the main body of the right axle rod.
2. The structure for improving the reduction ratio of an external rotor motor according to claim 1, wherein: the right axle rod is provided with a right axle rod flange connecting part.
3. The structure for improving the reduction ratio of an external rotor motor according to claim 1, wherein: the tip of left side axle rod is equipped with the constant head tank, the tip of right side axle rod is equipped with the location portion that can insert the constant head tank.
4. The structure for improving the reduction ratio of an external rotor motor according to claim 1, wherein: the tip of right side axle rod is equipped with the constant head tank, the tip of left side axle rod is equipped with the location portion that can insert the constant head tank.
5. The structure for improving the reduction ratio of an external rotor motor according to claim 1, wherein: the structure for improving the reduction ratio of the outer rotor motor further comprises a hub motor shell and a hub end cover, wherein the hub motor shell is connected with the hub end cover.
6. The structure for increasing the reduction ratio of an external rotor motor according to claim 5, wherein: an inner gear ring and a clutch are arranged in the hub motor shell, the clutch is mounted on the left shaft rod, the clutch is provided with a planetary gear, and the inner gear ring is meshed with the sun gear and is connected with the planetary gear of the clutch.
7. The structure for increasing the reduction ratio of an external rotor motor according to claim 2, wherein: the structure for improving the reduction ratio of the outer rotor motor further comprises a motor rotor assembly and a motor stator assembly, and the motor stator assembly is located inside the motor rotor assembly.
8. The structure for increasing the reduction ratio of an external rotor motor according to claim 7, wherein: and the motor stator assembly is arranged on the flange connecting part of the right shaft rod.
CN202120983481.8U 2021-05-10 2021-05-10 Structure for improving reduction ratio of outer rotor motor Active CN214707408U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120983481.8U CN214707408U (en) 2021-05-10 2021-05-10 Structure for improving reduction ratio of outer rotor motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120983481.8U CN214707408U (en) 2021-05-10 2021-05-10 Structure for improving reduction ratio of outer rotor motor

Publications (1)

Publication Number Publication Date
CN214707408U true CN214707408U (en) 2021-11-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120983481.8U Active CN214707408U (en) 2021-05-10 2021-05-10 Structure for improving reduction ratio of outer rotor motor

Country Status (1)

Country Link
CN (1) CN214707408U (en)

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