CN111516795A - Middle motor for electric power-assisted vehicle - Google Patents
Middle motor for electric power-assisted vehicle Download PDFInfo
- Publication number
- CN111516795A CN111516795A CN202010360258.8A CN202010360258A CN111516795A CN 111516795 A CN111516795 A CN 111516795A CN 202010360258 A CN202010360258 A CN 202010360258A CN 111516795 A CN111516795 A CN 111516795A
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- Prior art keywords
- rotor
- bearing
- electric power
- assisted vehicle
- motor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
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- 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
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
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- 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
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a middle motor for an electric power-assisted vehicle, which is used for outputting torque to a driving wheel of the electric power-assisted vehicle and comprises a seat body; the base body is fixedly provided with a stator, and the base body is rotatably provided with a rotor shaft and a main shaft; the rotor shaft and the power output unit are in a transmission relation, the rotor shaft is provided with a rotor, and a first one-way transmission unit is arranged between the rotor shaft and the rotor; the main shaft is connected with the power output unit through a second one-way transmission unit. According to the middle motor for the electric power-assisted vehicle, the first one-way transmission unit and the second one-way transmission unit are arranged, so that the rotor and the main shaft have mutually independent effects on the power output unit, three power modes including an electric mode, a manpower mode and a power-assisted mode can be realized, the loss of electric energy or kinetic energy input by a user in the electric mode and the manpower mode is small, and the energy conversion rate is high.
Description
Technical Field
The invention relates to the technical field of accessories for electric power-assisted vehicles, in particular to a middle-mounted motor for an electric power-assisted vehicle.
Background
Put the main application of motor in two-wheeled electric motor car, two-wheeled electric power assisted bicycle, electric tricycle isoelectric bicycle, put motor operation mode single in the current, carry on the electric bicycle who puts the motor in when pure electric operation, pedal can follow to rotate the foot nothing department of consuming energy and user and trample, when pure manpower tramples and gos forward, the rotor of motor rotates thereupon can consume user's energy.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the middle motor for the electric power-assisted vehicle with various operation modes.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a mid-motor for an electric power-assisted vehicle, which is used for outputting torque to a driving wheel of the electric power-assisted vehicle, and comprises a base body; the base body is fixedly provided with a stator, and the base body is rotatably provided with a rotor shaft and a main shaft;
the rotor shaft and the power output unit are in a transmission relation, the rotor shaft is provided with a rotor, and a first one-way transmission unit is arranged between the rotor shaft and the rotor;
the main shaft is connected with the power output unit through a second one-way transmission unit.
Further, the first one-way transmission unit is a one-way bearing which is arranged in a middle hole of the rotor.
Further, the rotor shaft is arranged in parallel with the main shaft; the main shaft and the power output unit are coaxially arranged; the rotor shaft establishes a driving relationship with the power take-off unit through a gear set.
Further, the gear set is provided with a first gear which is coaxially arranged with the power output unit and is fixedly connected with the power output unit;
the second one-way transmission unit is a ratchet mechanism and is arranged in the inner hole of the first gear.
Further, a speed sensor and/or a torque sensor are/is arranged on the main shaft;
the centrally-mounted motor further comprises a control system, and the speed sensor and/or the torque sensor are/is electrically connected with the control system.
Further, the rotor is an outer rotor.
Furthermore, the stator is internally provided with a middle hole, and a first bearing is arranged in the middle hole; the seat body is provided with a second bearing; the first bearing and the second bearing both play a role in supporting the rotor shaft.
Furthermore, a third bearing is further installed in an inner hole of the first gear, and a fourth bearing is installed on the seat body; the third bearing and the fourth bearing support the main shaft.
Further, the first gear is provided with a transmission part, and both sides of the transmission part are respectively provided with a first flange and a second flange; and a fifth bearing and a sixth bearing are respectively arranged between the first flange and the base body and between the second flange and the base body.
Further, the gear set also includes a second gear fixedly mounted on the rotor shaft and meshed with the first gear.
Has the advantages that: according to the middle motor for the electric power-assisted vehicle, the first one-way transmission unit and the second one-way transmission unit are arranged, so that the rotor and the main shaft have mutually independent effects on the power output unit, three power modes including an electric mode, a manpower mode and a power-assisted mode can be realized, the loss of electric energy or kinetic energy input by a user in the electric mode and the manpower mode is small, and the energy conversion rate is high.
Drawings
Fig. 1 is a structural diagram of a middle motor for an electric power-assisted vehicle.
In the figure: 1-a seat body; 2-a stator; 3-a rotor shaft; 4-a main shaft; 5-a rotor; 6-a first unidirectional transmission unit; 7-a second unidirectional transmission unit; 8-a power take-off unit; 9-a first gear; 91-a transmission part; 92-a first flange; 93-a second flange; 10-a speed sensor; 11-a torque sensor; 12-a control system; 13-a first bearing; 14-a second bearing; 15-a third bearing; 16-a fourth bearing; 17-a fifth bearing; 18-a sixth bearing; 19-second gear.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The middle motor for an electric power-assisted vehicle shown in fig. 1 can be used for electric power-assisted vehicles in the form of five-way electric bicycles, non-five-way electric bicycles, etc., and the middle motor outputs torque to a driving wheel of the electric power-assisted vehicle through a power output unit 8, wherein the power output unit 8 can be in the form of a sprocket, a gear, etc.
The built-in motor comprises a base body 1; the stator 2 is fixedly arranged on the base body 1, and the rotor shaft 3 and the main shaft 4 are rotatably arranged on the base body 1; the stator 2 is fixedly arranged on one side end cover included in the base body 1, and the stator 2 can be disassembled and assembled by disassembling and assembling the side end cover; the rotor shaft 3 is used for installing a rotor 5, the rotor 5 and the stator 2 form a main body part of the motor, and after the main body part of the motor is electrified, the rotor 5 can drive the rotor shaft 3 to actively run; the main shaft 4 is connected with a pedal of the electric power-assisted vehicle, and a user can apply pedal force to the main shaft 4 by stepping on the pedal to enable the main shaft 4 to rotate. The rotor shaft 3 is arranged in parallel with the main shaft 4, the main shaft 4 is directly arranged coaxially with the power output unit 8, the rotor shaft 3 establishes a power transmission relationship with the power output unit 8 through a gear set, the gear set comprises a second gear 19 which is coaxially arranged with the rotor shaft 3 and is relatively fixed, and a first gear 9 which is coaxially arranged with the power output unit 8 and is relatively fixed, and the first gear 9 is meshed with the second gear 19.
The rotor shaft 3 and the power output unit 8 have a transmission relation, a first one-way transmission unit 6 is arranged between the rotor shaft 3 and the rotor 5, the first one-way transmission unit 6 enables the rotor 5 to drive the rotor shaft 3 to rotate so as to drive the power output unit 8 to rotate in the forward direction only when the rotor 5 operates in the forward direction, and the rotor shaft 3 cannot drive the rotor 5 to rotate when the rotor 5 does not operate in the forward direction. In this embodiment, the first unidirectional transmission unit 6 is a unidirectional bearing.
The main shaft 4 is connected with the power output unit 8 through the second one-way transmission unit 7, the second one-way transmission unit 7 enables the main shaft 4 to drive the power output unit 8 to rotate in the forward direction only when the main shaft 4 rotates in the forward direction, the main shaft 4 cannot drive the power output unit 8 to rotate when the main shaft 4 rotates in the reverse direction, and the power output unit 8 cannot drive the main shaft 4 to rotate when the main shaft 4 is not operated by the pedal force of a user and the power output unit 8 rotates in the forward direction. In this embodiment, the second unidirectional transmission unit 7 is a ratchet mechanism.
The power output unit 8 is connected with the driving wheel of the electric power-assisted vehicle, and when the electric power-assisted vehicle normally runs, the power output unit 8 rotates in the forward direction, so that the power output unit 8 cannot rotate in the reverse direction when the electric power-assisted vehicle normally runs.
Through the structure, the first one-way transmission unit 6 and the second one-way transmission unit 7 are arranged, so that the rotor 5 and the main shaft 4 are independent of each other in action on the power output unit 8, and three power modes can be realized, namely: the electric mode, the manual mode, and the power-assisted mode are respectively described as follows:
under the electronic mode, the motor main part circular telegram, rotor 5 positive initiative operation drives rotor shaft 3 and rotates, and rotor shaft 3 drives power output unit 8 positive rotation and advances with the drive electric power assisted vehicle, and at this moment, the user does not provide pedal power to the pedal, and main shaft 4 does not initiatively operate, because the existence of second one-way transmission unit 7, power output unit 8 can not drive main shaft 4 and rotate, therefore user's foot can normally be put on pedal, and pedal can not rotate the power that consumes rotor 5.
In a manual mode, the main body part of the motor is not electrified, the rotor 5 does not actively run, a user pedals the pedal to drive the main shaft 4 to rotate, and the main shaft 4 drives the power output unit 8 to rotate through the second one-way transmission unit 7 to drive the electric vehicle to run; at this time, the power output unit 8 can drive the rotor shaft 3 to rotate, but due to the existence of the first one-way transmission unit 6, the rotor shaft 3 cannot drive the rotor 5 to rotate, so that the energy of the user cannot be lost by the rotor 5, and the kinetic energy generated by the user pedaling can be maximally transmitted to the driving wheel.
In the power-assisted mode, the main body part of the motor is electrified, the rotor 5 positively and actively runs to drive the rotor shaft 3 to rotate, meanwhile, a user pedals the pedal to drive the main shaft 4 to rotate, the power transmitted by the rotor shaft 3 and the power transmitted by the main shaft 4 are converged on the power output unit 8, and the combined force of the two powers drives the electric vehicle to run.
Preferably, in order to improve the compactness of the overall structure of the mid-motor, the rotor 5 is provided with a middle hole penetrating through the rotor, and the first unidirectional transmission unit 6 (i.e. the unidirectional bearing) is arranged in the middle hole of the rotor 5, so that the first unidirectional transmission unit 6 does not occupy the axial space of the rotor shaft 3 additionally, and the structural compactness is effectively improved.
The central motor in this embodiment adopts an outer rotor structure, that is, the rotor 5 is an outer rotor, the rotor 5 is provided with an accommodating cavity, and the stator 2 is arranged in the accommodating cavity. The outer rotor structure is adopted, the outer rotor has larger rotational inertia, larger power drive can be output through a smaller reduction ratio under the same volume, and the overall dimension of the motor can be obviously reduced under the condition that the power of the motor is the same.
In addition, the stator 2 is provided with a middle hole, and a first bearing 13 is installed in the middle hole; a second bearing 14 is arranged on the seat body 1; the first bearing 13 and the second bearing 14 both support the rotor shaft 3 and are arranged on two sides of the first one-way transmission unit 6, so that two sides of the rotor 5 are supported and rotate stably. Through the structural layout, the first bearing 13 is also accommodated in the width range of the rotor 5, so that the overall width of the stator 2, the rotor 5, the first unidirectional transmission unit 6 and the first bearing 13 is the width of the rotor 5, the occupied axial space is small, and the structure compactness is further improved.
The first gear 9 has a transmission part 91, transmission teeth engaged with the second gear 19 are arranged around the transmission part 91, a first flange 92 and a second flange 93 are respectively arranged at two sides of the transmission part 91, and a fifth bearing 17 and a sixth bearing 18 are respectively arranged between the first flange 92 and the second flange 93 and the seat body 1, so that the rotational stability of the first gear 9 can be ensured, and the power output unit 8 is fixed on the first flange 92. The central point of first gear 9 puts the hole that has its through, the hole is the ladder shape hole, and it comprises two hole sections that the diameter is different, second one-way transmission unit 7 (ratchet promptly) it is arranged in a hole section, installs third bearing 15 in another hole section, install fourth bearing 16 on the pedestal 1, third bearing 15 with fourth bearing 16 is right main shaft 4 plays the supporting role. By adopting the structure, on one hand, the power output unit 8 is fixed on the first flange 92, and the second one-way transmission unit 7 is arranged in the inner hole at the center of the first gear 9, so that the main shaft 4 and the rotor shaft 3 transmit power to the power output unit 8 through the first gear 9, and the flanges at two sides of the first gear 9 are supported by the bearings, so that the reliability and the rotational stability of the whole structure are greatly improved; on the other hand, the third bearing 15 for supporting the main shaft 4 is arranged in the inner hole at the center of the first gear 9, so that the third bearing 15 does not occupy the axial space of the main shaft 4 additionally, and the compactness of the structure is improved.
In a preferred embodiment, the main shaft 4 is provided with a speed sensor 10 and a torque sensor 11; the centrally-mounted motor further comprises a control system 12, and the speed sensor 10 and the torque sensor 11 are electrically connected with the control system 12. Like this control system 12 can judge present state of present electric power assisted vehicle according to rotational speed and moment data that speed sensor 10 and moment sensor 11 gathered to the auxiliary torque of rotor 5 output is increased and decreased to intelligence, for example: when the rotation speed of the main shaft 4 is slow and the torque is large, it is seen that the current road section is difficult to ride, and the control system 12 can control the rotor 5 to raise the output torque. In addition, because the diameter of the first gear 9 is large, the adjacent position of the first gear 9 has a large amount of space, and the control system 12 can be arranged at the adjacent position of the first gear 9, so that the whole width of the middle motor is not increased, and the small size of the middle motor is ensured.
According to the middle motor for the electric power-assisted vehicle, the first one-way transmission unit and the second one-way transmission unit are arranged, so that the rotor and the main shaft have mutually independent effects on the power output unit, three power modes including an electric mode, a manpower mode and a power-assisted mode can be realized, the loss of electric energy or kinetic energy input by a user in the electric mode and the manpower mode is small, and the energy conversion rate is high.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (10)
1. A middle motor for an electric power-assisted vehicle is used for outputting torque to a driving wheel of the electric power-assisted vehicle and is characterized by comprising a seat body; the base body is fixedly provided with a stator, and the base body is rotatably provided with a rotor shaft and a main shaft;
the rotor shaft and the power output unit are in a transmission relation, the rotor shaft is provided with a rotor, and a first one-way transmission unit is arranged between the rotor shaft and the rotor;
the main shaft is connected with the power output unit through a second one-way transmission unit.
2. The center-mounted motor for an electric power-assisted vehicle according to claim 1, wherein the first unidirectional transmission unit is a unidirectional bearing disposed in a center hole of the rotor.
3. The center-mounted motor for an electric power-assisted vehicle according to claim 1, wherein the rotor shaft is arranged in parallel with the main shaft; the main shaft and the power output unit are coaxially arranged; the rotor shaft establishes a driving relationship with the power take-off unit through a gear set.
4. The center-mounted motor for an electric power-assisted vehicle according to claim 3, wherein the gear set comprises a first gear which is coaxially arranged with the power output unit and is fixedly connected with the power output unit;
the second one-way transmission unit is a ratchet mechanism and is arranged in the shaft hole of the first gear.
5. The middle-placed motor for the electric power-assisted vehicle according to claim 1, wherein a speed sensor and/or a torque sensor is provided on the main shaft;
the centrally-mounted motor further comprises a control system, and the speed sensor and/or the torque sensor are/is electrically connected with the control system.
6. The mid-motor for an electric power-assisted vehicle according to claim 1, wherein the rotor is an outer rotor.
7. The mid-motor for the electric power-assisted vehicle according to claim 6, wherein the stator is provided with a middle hole, and a first bearing is installed in the middle hole; the seat body is provided with a second bearing; the first bearing and the second bearing both play a role in supporting the rotor shaft.
8. The middle-placed motor for the electric power-assisted vehicle according to claim 4, wherein a third bearing is further installed in an inner hole of the first gear, and a fourth bearing is installed on the seat body; the third bearing and the fourth bearing support the main shaft.
9. The center-mounted motor for an electric power-assisted vehicle according to claim 4, wherein the first gear includes a transmission portion, and both sides of the transmission portion include a first flange and a second flange, respectively; and a fifth bearing and a sixth bearing are respectively arranged between the first flange and the base body and between the second flange and the base body.
10. The center-mounted motor for an electric power-assisted vehicle of claim 4, wherein the gear set further comprises a second gear fixedly mounted on the rotor shaft and meshed with the first gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360258.8A CN111516795A (en) | 2020-04-30 | 2020-04-30 | Middle motor for electric power-assisted vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010360258.8A CN111516795A (en) | 2020-04-30 | 2020-04-30 | Middle motor for electric power-assisted vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111516795A true CN111516795A (en) | 2020-08-11 |
Family
ID=71902857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010360258.8A Pending CN111516795A (en) | 2020-04-30 | 2020-04-30 | Middle motor for electric power-assisted vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111516795A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09169290A (en) * | 1995-10-20 | 1997-06-30 | Mitsubishi Heavy Ind Ltd | Bicycle with auxiliary driving device and motor direct-coupled planetary roller speed reducing device |
| CN202414080U (en) * | 2011-12-29 | 2012-09-05 | 苏州博菲利电动科技有限公司 | Electric bicycle transmission system with speed sensing device |
| CN105966541A (en) * | 2016-07-01 | 2016-09-28 | 武汉千斤智能科技有限公司 | Middle motor for bicycle |
| CN205916284U (en) * | 2016-07-01 | 2017-02-01 | 武汉千斤智能科技有限公司 | Motor is put in with to bicycle |
| CN109625146A (en) * | 2019-01-11 | 2019-04-16 | 苏州盛亿电机有限公司 | The compact built-in motor being driven using primary gear speed reducing |
| CN212172437U (en) * | 2020-04-30 | 2020-12-18 | 常州洪记两轮智能交通工具有限公司 | Middle motor for electric power-assisted vehicle |
-
2020
- 2020-04-30 CN CN202010360258.8A patent/CN111516795A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09169290A (en) * | 1995-10-20 | 1997-06-30 | Mitsubishi Heavy Ind Ltd | Bicycle with auxiliary driving device and motor direct-coupled planetary roller speed reducing device |
| CN202414080U (en) * | 2011-12-29 | 2012-09-05 | 苏州博菲利电动科技有限公司 | Electric bicycle transmission system with speed sensing device |
| CN105966541A (en) * | 2016-07-01 | 2016-09-28 | 武汉千斤智能科技有限公司 | Middle motor for bicycle |
| CN205916284U (en) * | 2016-07-01 | 2017-02-01 | 武汉千斤智能科技有限公司 | Motor is put in with to bicycle |
| CN109625146A (en) * | 2019-01-11 | 2019-04-16 | 苏州盛亿电机有限公司 | The compact built-in motor being driven using primary gear speed reducing |
| CN212172437U (en) * | 2020-04-30 | 2020-12-18 | 常州洪记两轮智能交通工具有限公司 | Middle motor for electric power-assisted vehicle |
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