CN111532369A - Device and electric power-assisted bicycle are put to drive and variable speed integral type - Google Patents
Device and electric power-assisted bicycle are put to drive and variable speed integral type Download PDFInfo
- Publication number
- CN111532369A CN111532369A CN202010494664.3A CN202010494664A CN111532369A CN 111532369 A CN111532369 A CN 111532369A CN 202010494664 A CN202010494664 A CN 202010494664A CN 111532369 A CN111532369 A CN 111532369A
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- wheel
- transmission
- drive
- driving
- planet carrier
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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
- 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
- B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
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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
Abstract
The embodiment of the invention discloses a driving and speed changing integrated middle device and an electric power-assisted bicycle, wherein the middle device comprises a main driving unit, an auxiliary driving unit and a transmission mechanism, and the transmission mechanism comprises a crank connecting shaft, a planet carrier, a planet wheel, a sun wheel and a transmission wheel; the driving wheel is of an annular structure, an inner gear ring is arranged on the inner side of the driving wheel, an outer gear ring is arranged on the outer side of the driving wheel, and the driving wheel is fixedly connected with the toothed disc; the planet carrier is arranged on one side of the transmission wheel, and the crank connecting shaft is fixedly connected with the planet carrier; the planet gear is arranged on the planet carrier and is respectively meshed with the sun gear and the inner gear ring of the transmission wheel; the main driving unit is connected with an outer gear ring of the driving wheel; the auxiliary drive unit is connected with the sun gear. The driving and speed changing integrated middle device provided by the invention can realize the functions of power-assisted driving and speed changing at the same time, and has the characteristics of low cost, small volume, light weight and simplicity in installation and maintenance.
Description
Technical Field
The invention relates to the technical field of bicycles, in particular to a driving and speed changing integrated middle device and an electric power-assisted bicycle.
Background
The electric power-assisted bicycle is originally produced in japan, is driven by a hybrid power mode of "manpower + electric power", and can be driven by pure manpower. The electric power-assisted bicycle does not have a pure electric power riding mode, but needs hybrid power of 'manpower + electric power' for driving, and the electric power-assisted bicycle is essentially different from the pure electric mode of an electric vehicle.
Classified according to the class of power-assisted motors, there are hub motors and central motors. The hub motors are divided into two types, namely, the hub motor is called as front drive at the front wheel of the bicycle, and the hub motor is called as rear drive at the rear wheel of the bicycle.
At present, high-end electric Power-assisted bicycles all adopt a mid-motor + sensor System (a torque sensor, a speed sensor and a pedaling frequency sensor), adopt a Power Assist System with the torque sensor as a core, have a Power-assisted response speed and riding experience obviously better than that of a front-drive or rear-drive System, and adopt the torque sensor as a core sensor and Assist the speed and pedaling frequency sensor. The moment sensor is installed on the middle shaft of the bicycle, the middle shaft is connected with the crank, a torsion bar structure is just formed in the riding process, the surface of the middle shaft can generate invisible fine deformation when the middle shaft is subjected to torsion, and the manpower size can be calculated according to a mathematical model by measuring the deformation.
The speed-changing transmission systems of the prior bicycles are mainly divided into two categories, namely an external speed-changing system and an internal speed-changing system. The speed-changing system of bicycle is very important on a speed-changing bicycle, and determines the performance of a speed-changing bicycle, and the speed-changing system changes the speed ratio of the bicycle by changing the matching of a chain and different crankshafts and flywheels.
The internal speed-changing system realizes different speed ratios through a reduction gear conversion device in the hub. The novel LED lamp is deeply popular in the market due to the characteristics of small volume, light weight, high reliability, long service life, maintenance-free property, attractive appearance and the like; the inner speed changer has a complex product structure, strict technological requirements and high production cost, so the inner speed changer is expensive and mainly applied to high-end bicycles.
The defects and shortcomings of the prior art are as follows:
at present, the functions of power-assisted driving and speed changing are realized simultaneously, and only two systems of middle power-assisted driving and external rear wheel speed changing or internal speed changing are adopted for superposition. The cost is very high, the volume and the weight of the whole vehicle are increased, the installation and the debugging are complex, and two sets of systems to be maintained are relatively complex.
Disclosure of Invention
The embodiment of the invention aims to solve the problems of high cost, large increase of the volume and weight of the whole vehicle, complex installation and debugging and complex maintenance caused by the fact that a power-assisted driving function and a speed changing function in the prior art need to adopt a middle power-assisted driving system and an external rear wheel speed changing system or an internal speed changing system.
In order to solve the above problems, in a first aspect, an embodiment of the present invention provides a driving and speed changing integrated centrally-mounted device, where the driving and speed changing integrated centrally-mounted device includes a main driving unit, an auxiliary driving unit, and a transmission mechanism, where the transmission mechanism includes a crank connecting shaft, a planet carrier, a planet wheel, a sun wheel, and a transmission wheel; the transmission wheel is of an annular structure, an inner gear ring is arranged on the inner side of the transmission wheel, an outer gear ring is arranged on the outer side of the transmission wheel, and the transmission wheel is fixedly connected with the chain wheel; the planet carrier is arranged on one side of the transmission wheel, and the crank connecting shaft is fixedly connected with the planet carrier; the planet gear is arranged on the planet carrier and is respectively meshed with the sun gear and the inner gear ring of the transmission wheel; the main driving unit is connected with an outer gear ring of the driving wheel; the auxiliary drive unit is connected with the sun gear.
The technical scheme is that the main driving unit comprises a main driving motor and a first reduction gear set, and the main driving motor is connected with the outer gear ring of the driving wheel through the first reduction gear set.
The technical scheme is that the auxiliary driving unit comprises an auxiliary driving motor, a one-way clutch and a second reduction gear set, the auxiliary driving motor is connected with the second reduction gear set through the one-way clutch, and the second reduction gear set is connected with the sun gear.
The transmission mechanism comprises a plurality of planet wheels, and the planet wheels are uniformly arranged in a gap between the sun wheel and the transmission wheel.
The further technical scheme is that the driving and speed changing integrated middle device further comprises a motor fixing plate, and the main driving motor and the auxiliary driving motor are arranged on the motor fixing plate.
The further technical scheme is that the driving and speed changing integrated centrally-mounted device further comprises a controller, and the main driving unit and the auxiliary driving unit are connected with and controlled by the controller.
The further technical scheme is that two ends of the crank connecting shaft are connected with the crank.
The device further comprises a first shell and a second shell, wherein the first shell and the second shell are buckled to form an accommodating cavity, and the main driving unit, the auxiliary driving unit and the transmission mechanism are arranged in the accommodating cavity.
The further technical scheme is that the driving and speed changing integrated middle device further comprises a battery, and the main driving unit and the auxiliary driving unit are connected with the battery.
In a second aspect, an embodiment of the present invention provides an electric power assisted bicycle, which includes the driving and speed changing integrated middle device according to the first aspect.
Compared with the prior art, the embodiment of the invention can achieve the following technical effects:
in the embodiment of the invention, the main driving unit is connected with the outer gear ring of the driving wheel, and the main driving unit can output power to the driving wheel through the outer gear ring of the driving wheel, so that the power-assisted driving wheel rotates to achieve the power-assisted effect. Meanwhile, the auxiliary driving unit is connected with the sun gear and can drive the sun gear to rotate. When the sun wheel is static or rotates at a constant speed, the rotating speed of the crank connecting shaft and the rotating speed of the outer gear ring of the driving wheel keep a certain speed ratio. When the sun gear rotates in a speed-changing way, the rotating speed among the transmission wheel, the planet carrier and the sun gear is changed, and the transmission speed ratio of the crank rotation input speed and the output speed of the chain wheel is also changed correspondingly, so that different speed-changing effects can be generated. Therefore, the driving and speed changing integrated middle-mounted device provided by the invention can realize the power-assisted driving and speed changing functions simultaneously, and has the characteristics of low cost, small size, light weight and simplicity in installation and maintenance compared with the prior art that two systems of middle-mounted power-assisted driving and external rear wheel speed changing or internal speed changing are respectively adopted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is an exploded view of a mid-mounted device with integrated driving and speed changing according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a main driving unit of a mid-mounted device with integrated driving and speed changing according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an auxiliary driving unit of a mid-mounted device with integrated driving and speed changing according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a transmission mechanism of a driving and speed changing integrated centrally-mounted device according to an embodiment of the present invention.
Reference numerals
The main drive unit 10, the auxiliary drive unit 20, the transmission mechanism 30, the crank connecting shaft 31, the planet carrier 32, the planet gear 33, the sun gear 34, the transmission wheel 35, the inner gear ring 351, the outer gear ring 352, the main drive motor 11, the first reduction gear set 12, the auxiliary drive motor 21, the one-way clutch 22, the second reduction gear set 23, the motor fixing plate 40, the controller 50, the crank 60, the first housing 70, the second housing 80, the transmission cover plate 90 and the chain wheel 100.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, wherein like reference numerals represent like elements in the drawings. It is apparent that the embodiments to be described below are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention. As used in the description of embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
Referring to fig. 1 to 4, the present invention provides a mid-mounted device with integrated drive and transmission, which includes a main drive unit 10, an auxiliary drive unit 20, and a transmission mechanism 30.
The transmission mechanism 30 includes a crank connecting shaft 31, a planet carrier 32, a planet wheel 33, a sun wheel 34 and a transmission wheel 35. The transmission wheel 35 is of an annular structure, an inner gear ring 351 is arranged on the inner side of the transmission wheel 35, an outer gear ring 352 is arranged on the outer side of the transmission wheel 35, and the transmission wheel 35 is fixedly connected with the chain wheel 100. The driving wheel 35 drives the chain wheel 100 to rotate so as to drive the bicycle to move. The planet carrier 32 is arranged on one side of the transmission wheel 35, and the crank connecting shaft 31 is fixedly connected with the planet carrier 32. The planet gears 33 are arranged on the planet carrier 32 and are respectively meshed with the sun gear 34 and the inner gear ring 351 of the transmission wheel 35, and the main driving unit 10 is connected with the outer gear ring 352 of the transmission wheel 35; the auxiliary drive unit 20 is connected to the sun gear 34.
In the embodiment of the present invention, the main driving unit 10 is connected to the outer gear ring 352 of the transmission wheel 35, and the main driving unit 10 can output power to the transmission wheel 35 through the outer gear ring 352 of the transmission wheel 35, so as to assist the transmission wheel 35 to rotate, thereby achieving the assisting effect. Meanwhile, the auxiliary driving unit 20 is connected to the sun gear 34, and can drive the sun gear 34 to rotate. When the sun gear 34 is stationary or rotating at a constant speed, the rotational speed of the crank connecting shaft 31 and the rotational speed of the transmission wheel 35 will maintain a certain speed ratio. When the sun gear 34 rotates in a speed-changing manner, the rotation speed among the transmission wheel 35, the planet carrier 32 and the sun gear 34 is changed, and the transmission speed ratio of the crank rotation input speed and the output speed of the chain wheel 100 is also changed correspondingly, so that different speed-changing effects can be generated. Therefore, the driving and speed changing integrated middle-mounted device provided by the invention can realize the power-assisted driving and speed changing functions simultaneously, and has the characteristics of low cost, small size, light weight and simplicity in installation and maintenance compared with the prior art that two systems of middle-mounted power-assisted driving and external rear wheel speed changing or internal speed changing are respectively adopted.
Further, the main drive unit 10 comprises a main drive motor 11 and a first reduction gear set 12, and the main drive motor 11 is connected with the outer ring gear 352 of the transmission wheel 35 through the first reduction gear set 12. Wherein the main drive motor 11 is used to provide a main driving force. The first reduction gear set 12 (planetary reduction structure or multi-stage series reduction gear structure) is used to adapt the speed, outputting electric power assist to the outer ring gear 352 of the driving wheels.
Further, the auxiliary driving unit 20 includes an auxiliary driving motor 21, a one-way clutch 22, and a second reduction gear set 23, wherein the auxiliary driving motor 21 is connected to the second reduction gear set 23 through the one-way clutch 22, and the second reduction gear set 23 is connected to the sun gear 34. Wherein the auxiliary driving motor 21 is used to supply power or recover power. The one-way clutch 22 can only rotate in one direction and is disengaged from drive when reversing. The second reduction gear set 23 is used to adapt the speed, driving the sun gear 34 in rotation.
Further, the transmission mechanism 30 includes a plurality of planetary wheels 33, and the plurality of planetary wheels 33 are uniformly arranged in a gap between the sun wheel 34 and the transmission wheel 35. For example, in the present embodiment, the transmission mechanism 30 includes 4 planetary wheels 33.
Further, the driving and speed changing integrated centrally-mounted device further comprises a motor fixing plate 40, and the main driving motor 11 and the auxiliary driving motor 21 are both arranged on the motor fixing plate 40.
Further, the driving and speed changing integrated center-mounted device further comprises a controller 50, and the main driving unit 10 and the auxiliary driving unit 20 are connected with the controller 50 and controlled by the controller 50.
Further, both ends of the crank connecting shaft 31 are connected to the crank 60. Pedals are provided on the crank 60 for the user to input manual power.
Further, the driving and speed changing integrated center device further includes a first housing 70 and a second housing 80, the first housing 70 and the second housing 80 are fastened to form an accommodating cavity, and the main driving unit 10, the auxiliary driving unit 20 and the transmission mechanism 30 are all disposed in the accommodating cavity.
Further, the invention provides a driving and speed changing integrated middle-mounted device which further comprises a battery (such as a lithium battery). The main drive unit 10 and the auxiliary drive unit 20 are both connected to and powered by the battery.
Further, the driving and speed changing integrated centrally-mounted device further comprises a transmission cover plate 90, and the transmission cover plate 90 is arranged on one side of the transmission mechanism 30.
The operation modes of the driving and speed changing integrated centrally-mounted device provided by the invention comprise a manpower mode, an electric power-assisted mode and a speed changing mode, wherein the speed changing mode can be operated simultaneously with the manpower mode or the electric power-assisted mode, and the specific description is as follows:
in the human mode, the main drive unit is not operated. The auxiliary driving unit controls the sun wheel to be in a static state. The pedal manpower is input through the crank, and the planet carrier and the crank connecting shaft are fixedly connected because the crank and the crank connecting shaft are fixed. The crank connecting shaft rotates and simultaneously drives the planet carrier to rotate, the planet carrier drives the planet wheel to rotate, the driving wheel is further driven to rotate, and therefore the linkage chain wheel rotates to output power.
In the electric power assist mode, the main drive unit takes part in the operation control. And the auxiliary driving unit controls the sun gear to run at a certain speed. When the crank is driven to rotate by pedaling and manpower, the planet carrier is linked to rotate, the outer gear ring rotates under stress, the inner sensing system and the outer sensing system of the controller respond rapidly, real-time data such as pedaling frequency, torque, bicycle rotating speed and the like are obtained in real time through operation and amplification of the electric control system, electric power assistance starts to intervene immediately when set conditions (such as increasing of torque and rotating speed) are met, the main driving unit controls the power assistance to operate, namely the working output torque of the main motor is transmitted to the transmission wheel through the main driving reduction gear set, and the power assistance toothed disc operates. Meanwhile, the auxiliary driving unit converts the surplus energy into electric energy to be stored in the battery.
In the shift mode, the main drive unit and the auxiliary drive unit participate in the operation control at the same time.
When the crank is driven to rotate by foot-operated manpower, the planet carrier is linked to rotate at the same time to drive the driving wheel to operate. If the sun gear is stationary or constant, the rotational speed of the crank and the rotational speed of the drive wheel (i.e., the output speed of the crankset) will maintain a certain speed ratio.
When the sun gear rotates in a speed-changing way, the rotating speed among the transmission wheel, the planet carrier and the sun gear is changed, and the transmission speed ratio of the crank rotation input speed and the output speed of the chain wheel is also changed correspondingly, so that different speed-changing effects can be generated. The speed ratio change of the input and the output is controlled by the controller through the main driving unit and the auxiliary driving unit.
The embodiment of the invention also provides an electric power-assisted bicycle which comprises the driving and speed changing integrated middle device provided by the embodiment.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, while the invention has been described with respect to the above-described embodiments, it will be understood that the invention is not limited thereto but may be embodied with various modifications and changes.
While the invention has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A driving and speed change integrated middle device is characterized by comprising a main driving unit, an auxiliary driving unit and a transmission mechanism, wherein the transmission mechanism comprises a crank connecting shaft, a planet carrier, a planet wheel, a sun wheel and a transmission wheel; the transmission wheel is of an annular structure, an inner gear ring is arranged on the inner side of the transmission wheel, an outer gear ring is arranged on the outer side of the transmission wheel, and the transmission wheel is fixedly connected with the chain wheel; the planet carrier is arranged on one side of the transmission wheel, and the crank connecting shaft is fixedly connected with the planet carrier; the planet gear is arranged on the planet carrier and is respectively meshed with the sun gear and the inner gear ring of the transmission wheel; the main driving unit is connected with an outer gear ring of the driving wheel; the auxiliary drive unit is connected with the sun gear.
2. The drive and transmission integrated center-mount device according to claim 1, wherein the main drive unit includes a main drive motor and a first reduction gear set, the main drive motor being connected to the outer ring gear of the transmission wheel through the first reduction gear set.
3. The drive and transmission integrated center device according to claim 2, wherein the auxiliary drive unit includes an auxiliary drive motor, a one-way clutch, and a second reduction gear set, the auxiliary drive motor being connected to the second reduction gear set through the one-way clutch, the second reduction gear set being connected to the sun gear.
4. The drive and transmission integrated centrally-mounted device according to claim 1, wherein the transmission mechanism comprises a plurality of planetary wheels, and the plurality of planetary wheels are uniformly arranged in a gap between the sun wheel and the transmission wheel.
5. The mid-mount drive-and-shift device as recited in claim 3, further comprising a motor mounting plate, wherein the primary drive motor and the secondary drive motor are both disposed on the motor mounting plate.
6. The mid-mount drive-and-shift device as recited in claim 1, further comprising a controller, wherein the main drive unit and the auxiliary drive unit are connected to and controlled by the controller.
7. The drive and transmission integrated center device according to claim 1, wherein both ends of the crank connecting shaft are connected to a crank.
8. The mid-mounting device with integrated drive and transmission as set forth in claim 1, further comprising a first housing and a second housing, wherein the first housing and the second housing are fastened together to form a receiving cavity, and the main drive unit, the auxiliary drive unit and the transmission mechanism are disposed in the receiving cavity.
9. The mid-mount drive-and-shift device as recited in claim 1, further comprising a battery, the primary drive unit and the secondary drive unit being connected to the battery.
10. An electric power assisted bicycle comprising the drive and transmission integrated center device according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010494664.3A CN111532369A (en) | 2020-06-03 | 2020-06-03 | Device and electric power-assisted bicycle are put to drive and variable speed integral type |
| PCT/CN2020/099218 WO2021243780A1 (en) | 2020-06-03 | 2020-06-30 | Driving and speed changing integrated middle device and electric power-assisted bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010494664.3A CN111532369A (en) | 2020-06-03 | 2020-06-03 | Device and electric power-assisted bicycle are put to drive and variable speed integral type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111532369A true CN111532369A (en) | 2020-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010494664.3A Pending CN111532369A (en) | 2020-06-03 | 2020-06-03 | Device and electric power-assisted bicycle are put to drive and variable speed integral type |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111532369A (en) |
| WO (1) | WO2021243780A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105195A1 (en) * | 2020-11-23 | 2022-05-27 | 八方电气(苏州)股份有限公司 | Mid-drive motor capable of achieving multi-gear variable-speed adjustment |
| DE102022212262B3 (en) | 2022-11-17 | 2024-04-04 | Zf Friedrichshafen Ag | Drive device for a human-powered vehicle and vehicle with this drive device |
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| CN107074320A (en) * | 2014-09-02 | 2017-08-18 | E2驱动公司 | Dynamical system for pedal vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022105195A1 (en) * | 2020-11-23 | 2022-05-27 | 八方电气(苏州)股份有限公司 | Mid-drive motor capable of achieving multi-gear variable-speed adjustment |
| DE102022212262B3 (en) | 2022-11-17 | 2024-04-04 | Zf Friedrichshafen Ag | Drive device for a human-powered vehicle and vehicle with this drive device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021243780A1 (en) | 2021-12-09 |
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