CN209870096U - Side-hanging type motor driving device of electric motorcycle - Google Patents
Side-hanging type motor driving device of electric motorcycle Download PDFInfo
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- CN209870096U CN209870096U CN201920623713.1U CN201920623713U CN209870096U CN 209870096 U CN209870096 U CN 209870096U CN 201920623713 U CN201920623713 U CN 201920623713U CN 209870096 U CN209870096 U CN 209870096U
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Abstract
The utility model discloses an edge-hung motor driving device of an electric motorcycle, which comprises a driving wheel and a motor, wherein the driving wheel is arranged on a driving shaft, the two ends of the driving shaft are connected with a left fork body and a right fork body, and the tail ends of the left fork body and the right fork body are connected with a cross connector together and are fixedly connected with a frame; the motor is arranged on the outer side edge of one of the fork bodies, a motor shaft of the motor penetrates through the fork body and then is connected with a speed reducer positioned on the inner side of the fork body, and an output shaft of the speed reducer and the driving shaft are arranged integrally. The utility model adopts the external motor arrangement, and drives the wheel to work through the speed reducer, thereby breaking the limitation of the size of the wheel hub to the specification of the motor, and having the characteristics of large motor power, enough power, good heat dissipation effect and long service life; and the motor is optimally designed, so that the working stability of the motor can be effectively improved, and the working noise is reduced.
Description
Technical Field
The invention relates to an electric motorcycle, in particular to an edge-hung motor driving device of the electric motorcycle.
Background
The electric motorcycle is one kind of electric vehicle, and it is the same to use the battery driving motor to travel, but it is higher to the requirement on power than ordinary electric vehicle.
At present, the existing electric motorcycle still adopts a hub motor as a driving motor, but the space inside the hub is very limited, so that the specification and power of the motor inside the hub are severely limited, the whole power of the electric motorcycle is insufficient, the power and acceleration effect similar to those of a fuel motorcycle cannot be achieved, and the electric motorcycle is more obvious particularly in climbing.
In addition, the whole sealing of wheel hub motor is installed inside wheel hub, and the radiating effect in whole operation process is not good, and its work efficiency and life that will seriously influence the motor.
Disclosure of Invention
Aiming at the problems, the invention designs the side-hung motor driving device of the electric motorcycle, which adopts an external motor to drive a wheel to work through a speed reducer, thereby breaking the limit of the size of a wheel hub on the specification of the motor, and having the characteristics of large motor power, enough power, good heat dissipation effect and long service life; and the motor is optimally designed, so that the working stability of the motor can be effectively improved, and the working noise is reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electric motorcycle car's hanging motor drive arrangement in limit, includes drive wheel and motor, its characterized in that: the driving wheel is arranged on a driving shaft, the two ends of the driving shaft are connected with a left fork body and a right fork body, and the tail ends of the left fork body and the right fork body are jointly connected with a cross joint and fixedly connected with the frame; the motor is arranged on the outer side edge of one of the fork bodies, a motor shaft of the motor penetrates through the fork body and then is connected with a speed reducer positioned on the inner side of the fork body, and an output shaft of the speed reducer and the driving shaft are arranged integrally.
Further, the motor is composed of a shell, a stator and a rotor; the outer circle of the rotor is uniformly and continuously provided with a plurality of arc-shaped bulges in a circumferential direction, so that an unequal air gap structure is formed between the stator and the rotor, each bulge corresponds to two permanent magnets in a V-shaped layout on the rotor, and the highest position of each bulge is positioned in the center of the two permanent magnets.
Further, the ratio of the maximum air gap to the minimum air gap between the stator and the rotor is in the range of 2 ~ 3.
Furthermore, the inner circumferential surface of the stator is provided with at least one groove with the width equal to that of the stator notch on the surface of each yoke part.
Further, the groove is a rectangular groove or an arc groove.
Furthermore, the shell of the motor is composed of a left shell, a right shell and a middle shell which is wrapped outside the stator and connected with the left shell and the right shell.
Furthermore, the speed reducer is composed of an outer box body, an inner box cover and an internal transmission assembly; the outer box body and the fork body on the corresponding side are integrally formed; the inner box body is fixedly connected with the outer box body through a plurality of bolts.
Furthermore, the speed reducer is a two-stage speed reducing mechanism, a transmission assembly of the speed reducer comprises an input shaft, a transmission shaft and an output shaft, and two ends of each shaft are positioned on the outer box body and the inner box cover through bearings; the input shaft is provided with a driving pinion, the driving pinion is in meshing transmission with a driven gearwheel on the transmission shaft, the transmission shaft is coaxially provided with a driven pinion, and the driven pinion is in meshing transmission with an output gearwheel on the output shaft.
Furthermore, the outer end of the input shaft extends into the motor and is sleeved with the motor shaft through an inner spline structure. Furthermore, a disc brake device is arranged on the fork body on the other side and comprises a brake disc and a brake clamp, the brake disc is fixedly connected with the hub, and the brake clamp is arranged on the outer side of the front end of the fork body.
A method for processing an iron core of a stator comprises the following steps:
a. continuously punching notches and yoke parts which are larger than tooth sockets from a strip material, wherein each yoke part and half of the notches on the two sides of the yoke part form a T-like winding unit, each winding unit is provided with a riveting point at a position close to three end points, and a V-like notch is reserved in the center of the bottom of the notch of each adjacent winding unit;
b. and winding each winding unit to ensure that the inclined planes at the two sides of each V-shaped notch are just matched and corresponding to obtain a complete stator punching sheet, and overlapping and fastening the riveting points of each stator punching sheet up and down to obtain the iron core of the outer stator.
Furthermore, two bevel edges of the V-shaped notch are provided with arc bulges and arc grooves which are matched with each other.
The external-hanging motor drives the driving wheel to run, fundamentally breaks through the limitation of the size of the hub on the size of the motor and the influence of heat dissipation, can be directly driven by the high-power motor, and has the characteristics of sufficient power, good heat dissipation effect and long service life.
In addition, the motor is optimally designed, an unequal air gap structure design is adopted between the stator and the rotor, and the inner surface of the yoke part of the stator is provided with a plurality of grooves, so that the running stability of the motor can be improved, the noise is reduced, and the service life of the motor can be prolonged to a certain extent.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of the motor of the present invention;
FIG. 3 is a schematic structural diagram of a stator and a rotor of the motor of the present invention;
FIG. 4 is an enlarged view of a portion A of FIG. 3 according to the present invention;
FIG. 5 is a schematic perspective view of the reducer of the present invention;
FIG. 6 is a schematic perspective view of the transmission assembly of the speed reducer of the present invention;
FIG. 7 is a schematic perspective view of the motor shaft and the input shaft of the reducer of the motor of the present invention;
FIG. 8 is a sectional view showing a coupling structure of a motor shaft of the motor of the present invention and an input shaft of the decelerator;
fig. 9 is a schematic structural diagram of a bar-shaped material punched in the processing of an outer stator core punching sheet;
FIG. 10 is an enlarged view of a portion B of FIG. 9 according to the present invention;
fig. 11 is a schematic view of a punching sheet structure of the outer stator core.
Detailed Description
As shown in fig. 1, a side-hung motor driving apparatus for an electric motorcycle includes a driving wheel 1 and a motor 2.
The driving wheel 1 is installed on a driving shaft 11, two ends of the driving shaft 11 are connected with a left fork body 31 and a right fork body 32, and the tail ends of the left fork body 31 and the right fork body 32 are connected with a cross joint 4 together to be fixedly connected with a frame.
The motor 2 is mounted on the outer side of one of the forks, in the present illustration on the left fork 31, but in practice it could also be mounted on the right fork 32. The motor shaft 2a of the motor 2 penetrates through the left fork body 31 and then is connected with a speed reducer 5 positioned on the inner side of the left fork body 31, and the output shaft 5a of the speed reducer 5 and the driving shaft 11 are integrally arranged.
As shown in fig. 2 to 4, the motor 2 is composed of a housing 21, a stator 22, and a rotor 23. The housing 21 is composed of a left housing 21a, a right housing 21b and a middle housing 21c wrapping the outer side of the outer stator and connecting the left and right housings.
The outer circle of the rotor 23 is uniformly and continuously provided with a plurality of arc-shaped protrusions 231 around the circumferential direction, so that an unequal air gap 2b structure is formed between the stator 22 and the rotor 23, each arc-shaped protrusion 231 corresponds to two permanent magnets 232 arranged in a V shape on the rotor 23, and the highest position of each arc-shaped protrusion 231 is located in the center of the two permanent magnets 232.
In the prior art, the air gaps between the stator and the rotor of the motor are uniform, the air gap flux density distribution under the rotor permanent magnet is closer to the trapezoidal wave, more harmonic waves exist to influence the operation stability of the motor, the performance of the motor is influenced, and larger noise is generated. In order to solve the problem, the invention is provided with the arc bulge 231 arranged on the outer circumference of the rotor 23 to form an unequal air gap 2b structure with the stator 22, so that the air gap at the center of the rotor permanent magnet 232 is smaller, and the pole tips at two sides are provided with larger air gaps, thereby the air gap flux density distribution under the rotor permanent magnet 232 is close to a sine wave, which is very beneficial to reducing cogging torque and torque ripple during loading. Tests show that the cogging torque of the structure arrangement of the uneven air gaps 2b can be reduced by more than 50%, the performance of the motor can be effectively improved, and the running noise is reduced.
Here, in order to obtain the maximum cogging torque reduction effect, the ratio range of the maximum air gap to the minimum air gap between the stator and rotor 22 and 23 is set to 2 ~ 3.
The inner circumferential surface of the stator 22 is provided with at least one rectangular or circular arc-shaped groove 2211 on the surface of each yoke 221, the width of the groove 2211 is equal to that of the stator slot 222, the arrangement direction of the groove 2211 is parallel to that of the stator slot 222, and the grooves 2211 on the yoke 221 are uniformly distributed at equal intervals.
In the present illustration, the number of the grooves 2211 provided on each yoke portion 221 is four, and is rectangular in shape. In practice, one, two, three or more grooves 2211 may be provided on each yoke portion 221 according to the size of the stator 22, and the shape of the grooves 2211 may be circular arc as required.
The arrangement of the grooves 2211 on the yoke part 221 is equivalent to increase of the fundamental period number of the cogging torque of the stator 22, and the grooves can generate new cogging torque to compensate the original cogging torque, so that the amplitude of the total cogging torque is reduced, and the performance and the working efficiency of the motor are improved.
As shown in fig. 5 and 6, the speed reducer 5 includes an outer case 51, an inner case cover 52, and an internal transmission assembly 53, and the outer case 51 is integrally formed with the left fork 31 on the corresponding side. The inner case 52 is fixedly connected to the outer case 51 by a plurality of bolts 521.
The speed reducer adopted by the invention is a two-stage speed reducing mechanism, the whole transmission assembly 53 comprises an input shaft 531, a transmission shaft 532 and an output shaft 5a, and two ends of each shaft are positioned on the outer box body 51 and the inner box cover 52 through bearings 534.
The input shaft 531 is provided with a driving pinion 5311, the driving pinion 5311 is in meshing transmission with a driven gearwheel 5321 on the transmission shaft 532, the transmission shaft 532 is coaxially provided with a driven pinion 5322, and the driven pinion 5322 is in meshing transmission with an output gearwheel 5a1 on the output shaft 5 a.
In consideration of the intermittent transmission problem of the straight gear transmission, the gear teeth of the straight gear transmission have the phenomena of sudden engagement and sudden disengagement, which causes the mechanism to form instant impact and instant transmission ratio change.
Here, in consideration of the problem of oil sealing between the motor 2 and the reducer 5 in the reducer outer case 51, the input shaft 531 of the reducer 5 and the motor shaft 2a of the motor 2 of the present invention are separately connected, and as shown in fig. 7 and 8, the outer end of the input shaft 531 is inserted into the motor and is sleeved with the motor shaft 2a by the internal spline structure 5312. The split structure of the input shaft 531 and the motor shaft 2a enables the oil seal position not to be limited by the outer diameter of the motor shaft 2a and the outer diameter of the driving pinion 5311, and the shaft outer diameter of the oil seal position 5313 of the input shaft can be effectively reduced, so that the outer diameter of the oil seal with the outer box body of the speed reducer is reduced, the linear speed of the position is reduced during operation, and the purposes of reducing abrasion and prolonging the using effect are achieved. The disc brake device 6 is arranged on the right fork body 32 on the other side, the disc brake device 6 comprises a brake disc 61 and a brake clamp 62, the brake disc 61 is fixedly connected with a hub of the driving wheel 1, and the brake clamp 62 is arranged on the outer side of the front end of the right fork body 32.
The driving device with the structure drives the driving wheel 1 to operate through the externally-hung motor 2, fundamentally breaks through the limitation of the internal size of the hub of the driving wheel 1 on the size of the motor and the caused heat dissipation influence, can be directly driven by a high-power motor, has the characteristics of sufficient power, good heat dissipation effect and long service life, and can obtain the power performance comparable to that of a fuel motorcycle.
Considering that the conventional outer stator core is formed by stacking full-circle stamped sheets with tooth grooves, the conventional outer stator core has the defects of more leftover materials, low utilization rate of stamped sheet materials and very high material cost, the invention designs the iron core processing method of the stator 22, which comprises the following steps:
a. the strip-shaped material 7 is continuously punched with notches 71 and yoke parts 221 which are larger than the tooth grooves, each yoke part 221 and half notches on two sides of the yoke part form a T-shaped winding unit 7a, each winding unit 7a is provided with a riveting point 7a1 at the position close to three end points, and a V-shaped notch 7a2 is reserved in the center of the bottom of each notch of the adjacent winding unit 7a, and the structure of the T-shaped winding unit is shown in figures 9 and 10.
b. Each winding unit 7a is wound, so that the inclined surfaces at two sides of each V-shaped notch 7a2 are just matched and corresponding to obtain a complete stator punching sheet, the structure of which is shown in fig. 11, and the riveting points 7a1 of each stator punching sheet are aligned and overlapped and fastened up and down to obtain the iron core of the stator 22.
In order to ensure that the inclined surfaces on the two sides of the V-shaped notch 7a2 are in accurate corresponding fit in the winding process, the two inclined edges of the V-shaped notch 7a2 are provided with arc protrusions 7a21 and arc grooves 7a22 which are matched with each other.
The iron core of the stator 22 adopts a processing method of processing the straight strip material and then winding, which can effectively reduce the generation of leftover materials, save punching materials and have high economic benefit.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change or modification made to the above embodiments according to the technical principle of the present invention still falls within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides an electric motorcycle car's hanging motor drive arrangement in limit, includes drive wheel and motor, its characterized in that: the driving wheel is arranged on a driving shaft, the two ends of the driving shaft are connected with a left fork body and a right fork body, and the tail ends of the left fork body and the right fork body are jointly connected with a cross joint and fixedly connected with the frame; the motor is arranged on the outer side edge of one of the fork bodies, a motor shaft of the motor penetrates through the fork body and then is connected with a speed reducer positioned on the inner side of the fork body, and an output shaft of the speed reducer and the driving shaft are arranged integrally.
2. The edge-hung motor drive device of an electric motorcycle as claimed in claim 1, wherein: the motor consists of a shell, a stator and a rotor; the outer circle of the rotor is uniformly and continuously provided with a plurality of arc-shaped bulges in a circumferential direction, so that an unequal air gap structure is formed between the stator and the rotor, each bulge corresponds to two permanent magnets in a V-shaped layout on the rotor, and the highest position of each bulge is positioned in the center of the two permanent magnets.
3. The edge-hung motor driving device of an electric motorcycle as claimed in claim 2, wherein the ratio of the maximum air gap to the minimum air gap between the stator and the rotor is in the range of 2 ~ 3.
4. The edge-hung motor drive device of an electric motorcycle as claimed in claim 2, wherein: the inner circumferential surface of the stator is provided with at least one groove with the width equal to that of a stator notch on the surface of each yoke part.
5. The edge-hung motor drive device of an electric motorcycle as claimed in claim 4, wherein: the groove is a rectangular groove or an arc groove.
6. A side-hung motor drive unit for an electric motorcycle as claimed in any one of claims 2 to 5, wherein: the shell of the motor is composed of a left shell, a right shell and a middle shell which is wrapped outside the stator and connected with the left shell and the right shell.
7. A side-hung motor drive unit for an electric motorcycle as claimed in any one of claims 1 to 5, wherein: the speed reducer consists of an outer box body, an inner box cover and an internal transmission assembly; the outer box body and the fork body on the corresponding side are integrally formed; the inner box body is fixedly connected with the outer box body through a plurality of bolts.
8. The edge-hung motor drive device of an electric motorcycle as claimed in claim 7, wherein: the speed reducer is a two-stage speed reducing mechanism, a transmission assembly of the speed reducer comprises an input shaft, a transmission shaft and an output shaft, and two ends of each shaft are positioned on the outer box body and the inner box cover through bearings; the input shaft is provided with a driving pinion, the driving pinion is in meshing transmission with a driven gearwheel on the transmission shaft, the transmission shaft is coaxially provided with a driven pinion, and the driven pinion is in meshing transmission with an output gearwheel on the output shaft.
9. The edge-hung motor drive device of an electric motorcycle as claimed in claim 8, wherein: the outer end of the input shaft extends into the motor and is sleeved with the motor shaft through an inner spline structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920623713.1U CN209870096U8 (en) | 2019-05-05 | 2019-05-05 | Side-hanging type motor driving device of electric motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920623713.1U CN209870096U8 (en) | 2019-05-05 | 2019-05-05 | Side-hanging type motor driving device of electric motorcycle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN209870096U true CN209870096U (en) | 2019-12-31 |
| CN209870096U8 CN209870096U8 (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920623713.1U Active CN209870096U8 (en) | 2019-05-05 | 2019-05-05 | Side-hanging type motor driving device of electric motorcycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126607A (en) * | 2019-05-05 | 2019-08-16 | 台州市金宇机电有限公司 | A kind of hanging motor driver in the side of battery-operated motor cycle |
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2019
- 2019-05-05 CN CN201920623713.1U patent/CN209870096U8/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110126607A (en) * | 2019-05-05 | 2019-08-16 | 台州市金宇机电有限公司 | A kind of hanging motor driver in the side of battery-operated motor cycle |
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| Publication number | Publication date |
|---|---|
| CN209870096U8 (en) | 2023-04-07 |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Patentee Correct: TAIZHOU JINYU ELECTROMECHANICAL Co.,Ltd. False: Taizhou Jinyu electromechanical Co.,Ltd. Number: 53-01 Page: The title page Volume: 35 Correction item: Patentee Correct: TAIZHOU JINYU ELECTROMECHANICAL Co.,Ltd. False: Taizhou Jinyu electromechanical Co.,Ltd. Number: 53-01 Volume: 35 |
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| CU01 | Correction of utility model | ||
| OR01 | Other related matters | ||
| OR01 | Other related matters |