CN114084273A - Motor driving device of electric bicycle - Google Patents
Motor driving device of electric bicycle Download PDFInfo
- Publication number
- CN114084273A CN114084273A CN202111357217.4A CN202111357217A CN114084273A CN 114084273 A CN114084273 A CN 114084273A CN 202111357217 A CN202111357217 A CN 202111357217A CN 114084273 A CN114084273 A CN 114084273A
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- Prior art keywords
- motor
- electric bicycle
- wheel shell
- small
- rotating shaft
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- 239000000463 material Substances 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 10
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 10
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 4
- 239000010959 steel Substances 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M7/00—Motorcycles characterised by position of motor or engine
- B62M7/12—Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to the field of driving of electric bicycles, and particularly discloses a motor driving device of an electric bicycle, which comprises at least two small motors, a rotating shaft and a wheel shell, wherein the rotating shaft is fixed on a bicycle frame, the wheel shell is fixedly connected with a wheel, the wheel shell is cylindrical, two ends of the wheel shell are respectively and fixedly provided with an end cover, the rotating shaft is arranged along the axis of the wheel shell and is in rotating fit with the end covers at the two ends of the wheel shell, a motor support is arranged in the wheel shell, the motor support is fixedly arranged on the rotating shaft, and the small motors are fixedly arranged on one side of the motor support along the circumferential direction; an output gear is installed on an output shaft of the small motor, a gear ring is fixedly installed on the inner side of one end cover, and the output gear is respectively in meshing transmission with the gear ring. The invention aims to further reduce the use amount of rare earth magnetic steel, copper wire and silicon steel materials and meet the output power requirement of the electric bicycle.
Description
Technical Field
The invention relates to the field of driving of electric bicycles, in particular to a motor driving device of an electric bicycle.
Background
An electric bicycle is a mechatronic personal transportation tool which takes a storage battery as auxiliary energy and is provided with an electric motor, a controller, the storage battery, a rotating handle brake handle and other operating components and a display instrument system on the basis of a common bicycle. The most important part of the electric bicycle is the motor, and the quality of the motor basically determines the performance and the grade of the electric bicycle. The motors used by the electric bicycle are mostly high-efficiency rare earth permanent magnet motors which are mainly divided into a high-speed gear reduction motor with brushes, a low-speed brush motor and a low-speed brushless motor.
The motor is a component that converts battery electrical energy into mechanical energy and drives the electric vehicle wheel to rotate. There are many kinds of motors used in electric vehicles, including mechanical structures, rotation speed ranges, and energization forms. The common categories are: brush geared hub motors, brush gearless hub motors, brushless geared hub motors, high-disk motors, side-mounted motors, and the like.
At present, the motor of the electric bicycle usually uses a single motor, and the motor has the defects of large volume, heavy mass, more consumption of rare earth magnetic steel, copper wire and silicon steel materials, high cost and no contribution to environmental protection.
Disclosure of Invention
In order to further reduce the use amount of rare earth magnetic steel, copper wire and silicon steel materials and meet the output power requirement of the electric bicycle, the invention provides a motor driving device of the electric bicycle.
The invention adopts the following technical scheme:
a motor driving device of an electric bicycle comprises at least two small motors, a rotating shaft fixed on a bicycle frame and a wheel shell fixedly connected with a wheel, wherein the wheel shell is cylindrical, end covers are respectively and fixedly arranged at two ends of the wheel shell, the rotating shaft is arranged along the axis of the wheel shell and is in rotating fit with the end covers at the two ends of the wheel shell, a motor support is arranged in the wheel shell, the motor support is fixedly arranged on the rotating shaft, and the small motors are fixedly arranged on one side of the motor support along the circumferential direction; an output gear is installed on an output shaft of the small motor, a gear ring is fixedly installed on the inner side of one end cover, and the output gear is in meshing transmission with the gear ring respectively.
Further, the ring gear of the gear ring protrudes from one side of the small-sized motor, and the ring gear is engaged with the tooth profile of the output gear.
Furthermore, the number of the small motors is three, and the small motors are fixedly arranged on the motor support through motor supports respectively.
Further, the small-sized motor has a power of 90W, an outer diameter of 36mm, a length of 50mm, and a weight of 0.25 kg.
Furthermore, the main materials of the miniature motor are rare earth magnetic materials, copper wires and silicon steel sheets.
Furthermore, the motor support is of a disc-shaped structure, and a gap is reserved between the outer edge of the motor support and the inner wall of the wheel shell.
Furthermore, the rotating shaft is provided with a positioning hole, and the motor support is provided with a positioning pin matched with the positioning hole on the rotating shaft.
Furthermore, two ends of the rotating shaft are rotatably mounted in end covers at two ends of the wheel shell through bearings respectively.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. the invention relates to a bicycle, which is characterized in that a rotating shaft is fixedly arranged on a bicycle frame, end covers at two ends of a wheel shell are respectively and rotatably arranged on the rotating shaft, a gear ring is fixedly arranged at the inner side of one end cover, a motor support is fixedly arranged on the rotating shaft, small motors are respectively arranged on the motor supports, and an output gear meshed with the gear ring is arranged on an output shaft of each small motor. The small motors are started simultaneously to drive the gear rings to rotate synchronously and drive the end covers fixed with the small motors to rotate together, correspondingly, the wheel shells fixed with the end covers rotate synchronously, and the tires of the bicycle start to rotate as the wheel shells and the tires of the bicycle are fixed into a whole. This motor drive arrangement is through the quantity that increases small-size motor to satisfy different output's operation requirement, further reduce tombarthite magnet steel, copper line and silicon steel material quantity, satisfy electric bicycle's output requirement simultaneously.
2. The method is characterized in that according to a calculation formula T =9550P/N, P is power and is in KW unit; n is the rated rotation speed of the motor and the unit r/min, and T is the output torque of the motor and the unit Nm. Under the condition of meeting the requirement of providing the same motor power, the motor can be realized by increasing the rated rotating speed or reducing the volume of the motor, and the size and the weight of the motor are correspondingly reduced when the volume of the motor is reduced. According to the using power and product size limit of the electric bicycle, the size and the rotating speed of the small motor are designed to be suitable, and the number of the small motors can be increased or reduced to meet different using requirements of output power.
3. The invention is composed of at least two small motors, the power of the small motors is 90W, the outer diameter is 36mm, the length is 50mm, the weight is 0.25kg, the total usage amount of the main materials of the small motors is obviously reduced compared with the usage amount of rare earth magnetic materials, copper wires and silicon steel sheets of the main materials of the general electric bicycle, and the material resources and the production cost are effectively saved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the installation of the miniature motor of the present invention.
Fig. 3 is a schematic view of the motor mount mounting of the present invention.
Description of reference numerals:
1. a small-sized motor; 2. a rotating shaft; 3. a wheel housing; 4. an end cap; 5. a motor support; 6. an output gear; 7. a gear ring; 8. positioning holes; 9. positioning pins; 10. a ring gear; 11. a motor bracket; 12. and a bearing.
Detailed Description
The embodiment discloses a motor driving device of an electric bicycle, referring to fig. 1, the motor driving device comprises three small motors 1, a rotating shaft 2 fixed on a bicycle frame and a wheel shell 3 fixedly connected with a wheel, a motor support 5 is arranged in the wheel shell 3, the motor support 5 is in a disc-shaped structure, a gap is reserved between the outer edge of the motor support 5 and the inner wall of the wheel shell 3, and the motor support 5 is fixedly arranged on the rotating shaft 2. The small-sized motor 1 is fixedly arranged on one side of the motor support 5 along the annular direction and is fixedly arranged on the motor support 5 through the motor support 11 respectively; the small-sized motor 1 has a power of 90W, an outer diameter of 36mm, a length of 50mm, and a weight of 0.25 kg. The main materials of the small-sized motor 1 are rare earth magnetic materials, copper wires and silicon steel sheets.
Referring to fig. 2, an output gear 6 is mounted on an output shaft of the small-sized motor 1, a gear ring 7 is fixedly mounted on the inner side of one end cover 4, and the output gear 6 is in meshing transmission with the gear ring 7 respectively. The ring gear 10 of the gear ring 7 protrudes from one side of the small-sized motor 1, and the ring gear 10 is engaged with the tooth form of the output gear 6.
Referring to fig. 3, the wheel housing 3 is cylindrical, end caps 4 are fixedly mounted at two ends of the wheel housing 3, and the rotating shaft 2 is disposed along the axis of the wheel housing 3 and is in rotating fit with the end caps 4 at two ends of the wheel housing 3. The rotating shaft 2 is provided with a positioning hole 8, and the motor support 5 is provided with a positioning pin 9 matched with the positioning hole 8 on the rotating shaft 2. Two ends of the rotating shaft 2 are rotatably installed in the end covers 4 at two ends of the wheel shell 3 through bearings 12 respectively.
For motors with the same power and different pole numbers, the more the number of the magnetic pole pairs is, the lower the rotating speed is, the larger the volume is, and the larger the output torque is; the magnetic pole number is less, the rotating speed is higher, the volume is smaller, the output torque is smaller, and the power, the torque and the rotating speed of the motor meet the following calculation formula: t =9550P/N, where P is power, in KW; n is the rated rotation speed of the motor and the unit r/min, and T is the output torque of the motor and the unit Nm. The motor power of a common electric bicycle adopted in the prior art is 200-250W, the size is 106mm in outer diameter, the length is about 50mm, the weight is about 2kg, and the main materials are rare earth magnetic materials, copper wires and silicon steel sheets. The power of the single small motor 1 adopted in the embodiment is 90W, the outer diameter is 36mm, the length is 50mm, and the weight is 0.25kg, which is obviously reduced compared with the main materials of the motor of a general electric bicycle, such as rare earth magnetic material, copper wire and silicon steel sheet. According to the embodiment, three small motors 1 are used, the total output power of 270W is provided, the total weight is about 0.75kg, and the material consumption of the motor of the general electric bicycle with the specific power of 250W is saved by about 62.5%, so that the material resources and the production cost are effectively saved.
Claims (8)
1. The motor driving device of the electric bicycle is characterized by comprising at least two small motors (1), a rotating shaft (2) fixed on a bicycle frame and a wheel shell (3) fixedly connected with wheels, wherein the wheel shell (3) is cylindrical, end covers (4) are fixedly arranged at two ends of the wheel shell (3) respectively, the rotating shaft (2) is arranged along the axis of the wheel shell (3) and is in rotating fit with the end covers (4) at the two ends of the wheel shell (3), a motor support (5) is arranged in the wheel shell (3), the motor support (5) is fixedly arranged on the rotating shaft (2), and the small motors (1) are fixedly arranged on one side of the motor support (5) along the circumferential direction; an output gear (6) is installed on an output shaft of the small motor (1), a gear ring (7) is fixedly installed on the inner side of one end cover (4), and the output gear (6) is in meshing transmission with the gear ring (7) respectively.
2. The motor driving apparatus of an electric bicycle according to claim 1, wherein the ring gear (10) of the gear ring (7) protrudes from one side of the small-sized motor (1), and the ring gear (10) is engaged with the tooth profile of the output gear (6).
3. The motor driving apparatus of the electric bicycle according to claim 1, wherein the small-sized motors (1) are three in number and are fixedly mounted on the motor mount (5) by means of motor brackets (11), respectively.
4. The motor driving apparatus of the electric bicycle according to claim 3, wherein the small-sized motor (1) has a power of 90W, an outer diameter of 36mm, a length of 50mm, and a weight of 0.25 kg.
5. The motor driving apparatus of the electric bicycle according to claim 4, wherein the main materials of the small-sized motor (1) are rare earth magnet, copper wire and silicon steel sheet.
6. The motor driving apparatus of an electric bicycle according to claim 1, wherein the motor support (5) has a disk-like structure, and a gap is formed between an outer edge of the motor support (5) and an inner wall of the wheel housing (3).
7. The motor driving device of the electric bicycle according to claim 1, wherein the rotating shaft (2) is provided with a positioning hole (8), and the motor support (5) is provided with a positioning pin (9) which is matched with the positioning hole (8) of the rotating shaft (2).
8. The motor driving apparatus of an electric bicycle according to claim 1, wherein both ends of the rotation shaft (2) are rotatably installed in the end caps (4) of both ends of the wheel housing (3) through bearings (12), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111357217.4A CN114084273A (en) | 2021-11-16 | 2021-11-16 | Motor driving device of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111357217.4A CN114084273A (en) | 2021-11-16 | 2021-11-16 | Motor driving device of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114084273A true CN114084273A (en) | 2022-02-25 |
Family
ID=80301083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111357217.4A Pending CN114084273A (en) | 2021-11-16 | 2021-11-16 | Motor driving device of electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114084273A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453923A (en) * | 2002-04-27 | 2003-11-05 | 杨泰和 | Outer rotation driving mechanism of offset motor |
| CN2812389Y (en) * | 2005-07-01 | 2006-08-30 | 徐科科 | Wheel-hub motor for electric bicycle |
| CN201240466Y (en) * | 2008-06-30 | 2009-05-20 | 陈传生 | Combined type electric bicycle |
| CN201800859U (en) * | 2010-09-03 | 2011-04-20 | 陈传生 | Simple electric bicycle |
| CN202353386U (en) * | 2011-11-21 | 2012-07-25 | 天台县兴星电动车有限公司 | Electric bicycle motor with auxiliary power and electric bicycle provided with electric bicycle motor |
| CN202987453U (en) * | 2012-09-18 | 2013-06-12 | 袁国庆 | Electric bicycle power device |
| CN204415123U (en) * | 2014-01-17 | 2015-06-24 | 铁兵 | A kind of reduction electric hub system |
| CN105314052A (en) * | 2014-06-30 | 2016-02-10 | 德昌电机(深圳)有限公司 | A driving device for electric vehicles |
-
2021
- 2021-11-16 CN CN202111357217.4A patent/CN114084273A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453923A (en) * | 2002-04-27 | 2003-11-05 | 杨泰和 | Outer rotation driving mechanism of offset motor |
| CN2812389Y (en) * | 2005-07-01 | 2006-08-30 | 徐科科 | Wheel-hub motor for electric bicycle |
| CN201240466Y (en) * | 2008-06-30 | 2009-05-20 | 陈传生 | Combined type electric bicycle |
| CN201800859U (en) * | 2010-09-03 | 2011-04-20 | 陈传生 | Simple electric bicycle |
| CN202353386U (en) * | 2011-11-21 | 2012-07-25 | 天台县兴星电动车有限公司 | Electric bicycle motor with auxiliary power and electric bicycle provided with electric bicycle motor |
| CN202987453U (en) * | 2012-09-18 | 2013-06-12 | 袁国庆 | Electric bicycle power device |
| CN204415123U (en) * | 2014-01-17 | 2015-06-24 | 铁兵 | A kind of reduction electric hub system |
| CN105314052A (en) * | 2014-06-30 | 2016-02-10 | 德昌电机(深圳)有限公司 | A driving device for electric vehicles |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220225 |