CN210882487U - Centrally-mounted driving mechanism and power-assisted bicycle with same - Google Patents
Centrally-mounted driving mechanism and power-assisted bicycle with same Download PDFInfo
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- CN210882487U CN210882487U CN201921301386.4U CN201921301386U CN210882487U CN 210882487 U CN210882487 U CN 210882487U CN 201921301386 U CN201921301386 U CN 201921301386U CN 210882487 U CN210882487 U CN 210882487U
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Abstract
The utility model discloses a middle-placed driving mechanism, which comprises a shell connected with a bicycle frame, a motor arranged in the shell, a transmission mechanism connected with the motor, and a middle shaft arranged in the shell and connected with a pedal crank of a bicycle; the axis of the motor is perpendicular to the middle shaft, and the axis of the motor is located in the vertical plane where the axis of the bicycle frame is located after assembly is completed. Because the centers of gravity of the motor and the bicycle frame respectively fall on the respective axes, and the axes of the motor are positioned in the vertical plane where the axes of the bicycle frame are positioned, the center of gravity of the central driving mechanism and the center of gravity of the bicycle frame are positioned in the same vertical plane, the problems that the center of gravity of the whole bicycle is unstable due to the center of gravity offset, the whole bicycle is difficult to control and is easy to turn on one's side and the like caused by the unstable center of gravity of the whole bicycle are solved, the stability of the power-assisted bicycle is improved. Furthermore, the utility model also provides an including above-mentioned put actuating mechanism's moped in.
Description
Technical Field
The utility model relates to a moped technical field, more specifically say, relate to an in put actuating mechanism. Furthermore, the utility model discloses still relate to one kind and put actuating mechanism's moped in above-mentioned.
Background
The power-assisted bicycle is provided with a power auxiliary system, and is a novel vehicle capable of realizing integration of manual riding and motor power assisting.
According to the position of the power auxiliary system, the motor of the power-assisted bicycle can be divided into a middle motor and a hub motor, wherein the middle motor has great advantages in the aspects of technology, performance and the like, and the application is wider.
In the prior art, the axis of the middle motor is parallel to the middle shaft, and the center of gravity of the middle driving mechanism assembled on the power-assisted bicycle is offset from the center of gravity of the frame due to the large size of the middle driving mechanism, so that the center of gravity of the whole power-assisted bicycle is unstable, and the user experience of a user is seriously influenced.
In summary, how to avoid the center of gravity of the centrally-mounted driving mechanism and the center of gravity of the vehicle frame from being offset is an urgent problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an in put actuating mechanism, the focus of putting actuating mechanism in and the focus of frame are located same vertical face, have avoided the unstable problem of moped focus that the focus biasing brought.
The utility model also provides a moped of putting actuating mechanism in including the aforesaid.
In order to achieve the above object, the present invention provides the following technical solutions:
a middle driving mechanism comprises a shell, a motor, a transmission mechanism and a middle shaft, wherein the shell is used for being connected with a bicycle frame, the motor is arranged in the shell, the transmission mechanism is connected with the motor, and the middle shaft is arranged in the shell and is used for being connected with a pedal crank of a bicycle;
the axis of the motor is perpendicular to the middle shaft, and the axis of the motor is approximately positioned in a vertical plane where the axis of the bicycle frame is positioned after the motor is assembled.
Preferably, the transmission mechanism comprises a first bevel gear and a second bevel gear for changing the transmission direction, the axis of the first bevel gear is collinear with the axis of the output shaft of the motor, and the axis of the second bevel gear is collinear with the axis of the middle shaft.
Preferably, a planetary gear reduction mechanism is arranged between the motor and the first bevel gear, the planetary gear reduction mechanism comprises a sun gear connected with an output shaft of the motor, a gear carrier connected with the first bevel gear, and a plurality of planet gears meshed with the sun gear, the planet gears are mounted on the gear carrier, and the plurality of planet gears are uniformly distributed in the circumferential direction of the gear carrier.
Preferably, the gear carrier comprises an upper supporting plate, a lower supporting plate and a planet gear shaft sleeved on the planet gear, and two ends of the planet gear shaft are respectively connected with the upper supporting plate and the lower supporting plate so as to support two ends of the planet gear.
Preferably, the transmission mechanism includes a clutch for disconnecting or maintaining a transmission relationship between the motor and the middle shaft, and the clutch is disposed between the second bevel gear and the middle shaft, or between the planetary gear reduction mechanism and the first bevel gear, or between an output shaft of the motor and the planetary gear reduction mechanism.
Preferably, the clutch is a wedge clutch.
Preferably, the height of the wedge clutch cross section ranges from 3.5mm to 4.5 mm.
Preferably, the axis of the motor is perpendicularly intersected with the axis midpoint of the middle shaft.
Preferably, the axis of the motor is parallel to the bicycle frame so as to mount the motor portion within the bicycle frame.
A power-assisted bicycle comprises a frame and a middle driving mechanism arranged on the frame, wherein the middle driving mechanism is the middle driving mechanism of any one of the above.
The utility model provides a middle driving mechanism, which comprises a shell connected with a bicycle frame, a motor connected with the shell, a transmission mechanism connected with the motor, and a middle shaft arranged in the shell and connected with a pedal crank of a bicycle; the axis of the motor is vertical to the middle shaft, and the axis of the motor is positioned in the vertical plane where the axis of the bicycle frame is positioned.
The motor, the transmission mechanism and the middle shaft are sequentially connected, and the middle shaft is connected with the pedal crank of the bicycle, so that the rotation of the motor can be transmitted to the middle shaft through the transmission mechanism to help a user to ride.
Because the motor and the bicycle frame are of an axisymmetric structure, the centers of gravity of the motor and the bicycle frame respectively fall on respective axes, and the axes of the motor are positioned in a vertical plane where the axes of the bicycle frame are positioned, so that the center of gravity of the middle driving mechanism and the center of gravity of the bicycle frame are positioned in the same vertical plane, the problems that the center of gravity of the whole bicycle is unstable due to gravity offset and is difficult to control and easy to turn over caused by the unstable center of gravity of the whole bicycle are solved, the stability of the power-assisted bicycle is improved, and the user experience of a user is improved.
Furthermore, the utility model also provides a moped of putting actuating mechanism in including the aforesaid, stability is high, has improved user experience.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a mid-drive mechanism provided in the present invention;
FIG. 2 is a schematic cross-sectional view of the mid-drive mechanism provided in FIG. 1;
FIG. 3 is a schematic front view of the mid-drive mechanism provided in FIG. 1;
FIG. 4 is a schematic right side view of the mid-drive mechanism provided in FIG. 1;
FIG. 5 is a rear view of the mid-drive mechanism provided in FIG. 1;
fig. 6 is a schematic structural view of the planetary gear speed reduction mechanism in fig. 1.
In fig. 1-6:
1 is a chain wheel, 2 is a bicycle pedal crank, 3 is a shell, 4 is a motor, 5 is a middle shaft, 6 is a clutch, 7 is a planet wheel, 8 is a bevel gear, 9 is a planet gear shaft, 10 is an upper support plate, 11 is a lower support plate, and 12 is a chain wheel support.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The core of the utility model is to provide an in put actuating mechanism, the focus of putting actuating mechanism in is located same vertical face with the focus of frame, has avoided the unstable problem of helping hand bicycle focus that the focus biasing brought.
Furthermore, the utility model also provides an including above-mentioned put actuating mechanism's moped in.
Referring to fig. 1 to 6, fig. 1 is a schematic structural diagram of an embodiment of a mid-drive mechanism provided in the present invention; FIG. 2 is a schematic cross-sectional view of the mid-drive mechanism provided in FIG. 1; FIG. 3 is a schematic front view of the mid-drive mechanism provided in FIG. 1; FIG. 4 is a schematic right side view of the mid-drive mechanism provided in FIG. 1; FIG. 5 is a rear view of the mid-drive mechanism provided in FIG. 1; fig. 6 is a schematic structural view of the planetary gear speed reduction mechanism in fig. 1.
The middle driving mechanism provided by the embodiment comprises a shell 3 connected with a bicycle frame, a motor 4 arranged in the shell 3, a transmission mechanism connected with the motor 4, and a middle shaft 5 which is arranged in the shell 3 and connected with a bicycle pedal crank 2, wherein the transmission mechanism is connected with the middle shaft 5; the axis of the motor 4 is perpendicular to the bottom bracket 5, and the axis of the motor 4 is approximately positioned in the vertical plane of the axis of the bicycle frame after the assembly is finished. "substantially" here in a vertical plane of the axis of the bicycle frame is understood to mean that, not absolutely in this vertical plane, a deviation of plus or minus 5mm is tolerable, that is to say when the maximum distance between the axis of the motor and the vertical plane of the axis of the frame is less than 5mm, and this is within the scope of the invention.
The shell 3 is connected with a bicycle frame and used for fixing the position of the middle driving mechanism on the power-assisted bicycle. The shell 3 and the bicycle frame can be detachably connected, such as pin connection and bolt connection, so that the middle-mounted driving mechanism can be conveniently overhauled and maintained; and may also be non-detachable connections such as welding.
The motor 4 is used for providing assistance and helping a user to drive the bicycle wheels, the motor 4 is connected with the transmission mechanism, and the transmission mechanism is connected with the middle shaft 5, so that the middle shaft 5 can be driven to rotate by utilizing the power output by the motor 4 through the transmission mechanism, a bicycle chain wheel connected to the middle shaft 5 is driven to rotate, and the bicycle chain wheel drives the bicycle wheels to rotate through a bicycle chain.
The transmission mechanism is used for reducing the speed of an output shaft of the motor 4 and transmitting torque through connection with the middle shaft 5. The structure of the transmission mechanism can be a planetary gear structure, a bevel gear structure, a worm gear mechanism, or any other structure meeting the requirements.
The central shaft 5 is mounted in the housing 3, preferably, the central shaft 5 is mounted on the central axis of the housing 3. The chain wheel support 12 for mounting the chain wheel 1 of the bicycle is sleeved on the middle shaft 5, and the chain wheel support 12 supports the chain wheel 1 at a first position in the axial direction of the middle shaft 5 so as to meet the design requirement of the distance between the chain wheel 1 and the bicycle frame. For example, it may be required that the mounting position of the crankset 1 is in the range of 44.5mm to 47mm from the projection of the bicycle frame in the axial direction of the bottom bracket 5.
Because motor 4, the bicycle frame is the axisymmetric structure, consequently the focus of motor 4 and bicycle frame falls on respective axis respectively, and the axis of motor 4 is located the vertical plane at the axis place of bicycle frame, so the focus of the centre drive mechanism that puts that this embodiment provided is located same vertical plane with the focus of bicycle frame, the whole car focus that has avoided the focus offset to bring is unstable and the difficult control that arouses from this, the scheduling problem turns on one's side easily, the stability of moped has been improved, user's user experience has been improved.
In the assembling process, in order to ensure that the axis of the motor 4 is positioned in the vertical plane of the axis of the bicycle frame, the distance range from the projection of the axis of the motor 4 and the axis of the transmission mechanism in the axial direction of the middle shaft 5 to the first position is controlled to be the same as the design requirement of the distance between the chain wheel 1 and the bicycle frame.
Preferably, the axis of the motor 4 is perpendicular to the axis midpoint of the bottom bracket 5.
On the basis of the above embodiment, in order to realize the perpendicular arrangement of the motor 4 and the middle shaft 5, the transmission mechanism may comprise a first bevel gear and a second bevel gear for changing the transmission direction, wherein the axis of the first bevel gear and the axis of the first bevel gear are collinear with the axis of the output shaft of the motor 4, and the axis of the second bevel gear is collinear with the axis of the middle shaft 5.
The axis of the first bevel gear is collinear with the axis of the motor 4, the first bevel gear can be directly connected with the output shaft of the motor 4, or can be connected with the output shaft of the motor 4 through other transmission devices, and the first bevel gear is connected with the output shafts of the other transmission devices.
The axis of the second bevel gear is collinear with the axis of the middle shaft 5, the second bevel gear can be sleeved on the middle shaft 5, and the second bevel gear can be connected on the middle shaft 5 through a connecting sleeve with other transmission devices.
Considering that the rotating speed output by the motor 4 is too high to be suitable for the middle shaft 5 and other rotating parts in the bicycle, the first bevel gear and the second bevel gear can be designed with a certain reduction ratio.
In the embodiment, the first bevel gear and the second bevel gear are arranged to convert the torque generated by the motor 4 into the torque on the plane vertical to the axis of the motor 4, so that the motor 4 and the middle shaft 5 are vertically arranged, and the transmission device has a compact structure and is beneficial to reducing the volume of the middle shaft driving mechanism.
On the basis of the above embodiment, in order to further reduce the rotation speed of the output torque of the motor 4, a planetary gear reduction mechanism may be disposed between the motor 4 and the first bevel gear, the planetary gear reduction mechanism includes a sun gear connected to the output shaft of the motor 4, a carrier connected to the first bevel gear, and a plurality of planet gears 7 engaged with the sun gear, the planet gears 7 are mounted on the carrier, and the plurality of planet gears 7 are uniformly distributed in the circumferential direction of the carrier.
In the working process, an output shaft of the motor 4 drives the sun gear to synchronously rotate, and when the planet gear 7 meshed with the sun gear revolves around the sun gear, the planet gear 7 rotates to drive the gear carrier to output torque outwards.
Preferably, the sun gear may be mounted on the output shaft of the motor 4, and of course, the sun gear and the output shaft of the motor 4 may be designed as an integral structure, so as to reduce the number of parts and facilitate the mounting process.
Preferably, the number of the planet wheels 7 is three, the stress on the output shaft of the motor 4 is uniform, the number of the planet wheels 7 is relatively small, and the occupied installation space is small.
The sun gear is connected with an output shaft of the motor 4, the sun gear is meshed with the planet gear 7 to complete the first speed reduction process, and the diameter ratio of the planet gear 7 to the output shaft of the motor 4 is a first speed reduction ratio; the first bevel gear and the second bevel gear can be collectively referred to as bevel gears 8, the two bevel gears 8 are meshed with each other to complete the second speed reduction process, and the diameter ratio of the second bevel gear to the first bevel gear is a second speed reduction ratio.
The product of the first reduction ratio and the second reduction ratio is the total reduction ratio of the reduction mechanism, the total reduction ratio is determined according to the output rotating speed of the motor 4 and the rotating speed range which can be borne by the middle shaft 5, and in the case of determining the total reduction ratio, the first reduction ratio and the second reduction ratio need to be distributed in consideration of the size of parts and other problems.
The dimensions of the planet wheels 7 and the bevel gears 8 are influenced by the first reduction ratio, the second reduction ratio, etc.
Preferably, the first reduction ratio may be set to 9: 1, the second reduction ratio is 5: 1. Of course, other desired reduction ratio assignment schemes may be selected.
On the basis of the above-mentioned embodiment, the gear carrier can include last backup pad 10, bottom suspension fagging 11 and be used for the cover to establish planet gear shaft 9 of planet wheel 7, and planet gear shaft 9's both ends are connected with last backup pad 10, bottom suspension fagging 11 respectively to support the both ends of planet wheel 7 simultaneously, reduce rocking of operation in-process planet wheel 7, noise abatement improves operating stability.
During assembly, referring to fig. 2, the planet shafts 9 are first mounted on the lower support plate 11, the planet wheels 7 are then sleeved on the corresponding planet shafts 9, and finally the upper support plate 10 is connected with the planet shafts 9.
On the basis of the above embodiment, in order to realize the switching between the manual riding state and the motor assisting state, the transmission mechanism includes the clutch 6 for cutting off or maintaining the transmission relationship between the motor 4 and the middle shaft 5, and the clutch 6 is arranged between the first bevel gear and the middle shaft 5, or between the planetary gear reduction mechanism and the first bevel gear, or between the output shaft of the motor 4 and the planetary gear reduction mechanism.
Preferably, referring to fig. 2, the clutch 6 is arranged between the first bevel gear and the bottom bracket 5. When the clutch 6 is meshed with the middle shaft 5, the torque is transmitted to the middle shaft 5 from the output shaft of the motor 4 through the speed reducing mechanism and the clutch 6 in sequence to help drive the bicycle chain wheel sleeved on the middle shaft 5, so that the bicycle wheel connected with the bicycle chain wheel through a bicycle chain is driven to rotate, and the motor power assisting function is realized; when the clutch 6 is separated from the middle shaft 5, the torque transmission between the motor 4 and the middle shaft 5 is cut off, and the bicycle pedal can drive the middle shaft 5 to rotate freely without extra work to drive the transmission mechanism.
In order to meet the switching of the running state of the power-assisted bicycle, the clutch 6 adopts a one-way clutch.
Preferably, a wedge clutch can be selected as the clutch 6, the cross section thickness is low, the load capacity is high, the occupied installation space can be reduced, and the structure of the middle driving mechanism is more compact.
Preferably, the wedge clutch may have a cross-sectional height ranging from 3.5mm to 4.5 mm.
Referring to fig. 2, the cross-sectional height of the clutch 6 may be 4mm, which greatly reduces the installation space occupied by the clutch 6.
On the basis of the above embodiment, in order to reduce the installation space occupied by the centrally-mounted driving mechanism, the axis of the motor 4 may be designed to be parallel to the bicycle frame, so that the motor 4 is partially installed in the bicycle frame. Because the motor 4 is partially installed in the bicycle frame, the gravity center of the motor 4 and the gravity center of the bicycle frame are ensured to be positioned in the same vertical plane, and the problem of gravity center offset in the prior art is avoided.
Except that put drive arrangement in the above-mentioned, the utility model discloses still provide a put drive arrangement's moped including the disclosure of above-mentioned embodiment, this moped includes the frame and installs the actuating mechanism in putting on the frame, put actuating mechanism in for the central actuating mechanism that puts that the above-mentioned embodiment discloses, this moped's other structures can refer to prior art, and this specific embodiment is no longer repeated.
It should be noted that the first and second bevel gears mentioned in the present document are only used to distinguish the difference in position, and do not contain any limitation on the order.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
It is right above the utility model provides an in put actuating mechanism and put actuating mechanism's moped including the aforesaid and introduced in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (10)
1. The middle-placed driving mechanism is characterized by comprising a shell (3) connected with a bicycle frame, a motor (4) arranged in the shell (3), a transmission mechanism connected with the motor (4), and a middle shaft (5) which is arranged in the shell (3) and is used for being connected with a pedal crank (2) of a bicycle;
the axis of the motor (4) is perpendicular to the middle shaft (5), and the axis of the motor (4) is approximately located in the vertical plane where the axis of the bicycle frame is located after assembly.
2. The centrally placed drive mechanism according to claim 1, characterised in that the transmission comprises a first bevel gear and a second bevel gear for changing the transmission direction, the axis of the first bevel gear being co-linear with the axis of the output shaft of the motor (4), the axis of the second bevel gear being co-linear with the axis of the central shaft (5).
3. The centrally placed drive mechanism according to claim 2, characterised in that a planetary gear reduction mechanism is provided between the electric motor and the first bevel gear, the planetary gear reduction mechanism comprising a sun gear connected to the output shaft of the electric motor (4), a carrier connected to the first bevel gear, and a number of planet gears (7) meshing with the sun gear, the planet gears (7) being mounted on the carrier and the number of planet gears (7) being evenly distributed in the circumferential direction of the carrier.
4. The centrally placed drive mechanism according to claim 3, characterized in that the gear carrier comprises an upper support plate (10), a lower support plate (11) and a planet gear shaft (9) for sleeving the planet gears (7), and two ends of the planet gear shaft (9) are respectively connected with the upper support plate (10) and the lower support plate (11) so as to support two ends of the planet gears (7).
5. The centrally placed drive mechanism according to claim 3, characterised in that the transmission mechanism comprises a clutch (6) for disconnecting or maintaining the transmission relationship between the electric motor (4) and the central shaft (5), the clutch (6) being arranged between the second bevel gear and the central shaft (5), or between the planetary gear reduction mechanism and the first bevel gear, or between the output shaft of the electric motor (4) and the planetary gear reduction mechanism.
6. A centrally placed drive mechanism according to claim 5, characterised in that the clutch (6) is a wedge clutch.
7. The mid-drive mechanism as recited in claim 6, wherein the wedge clutch cross-section has a height in the range of 3.5mm to 4.5 mm.
8. Centrally placed drive mechanism according to any of claims 1-7, characterized in that the axis of the motor (4) perpendicularly intersects the axial midpoint of the bottom bracket axle (5).
9. The centrally placed drive mechanism according to claim 8, characterised in that the axis of the motor (4) is parallel with the bicycle frame in order to partly mount the motor (4) within the bicycle frame.
10. A power-assisted bicycle comprising a frame and a centrally mounted drive mechanism mounted on the frame, wherein the centrally mounted drive mechanism is the centrally mounted drive mechanism of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301386.4U CN210882487U (en) | 2019-08-12 | 2019-08-12 | Centrally-mounted driving mechanism and power-assisted bicycle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921301386.4U CN210882487U (en) | 2019-08-12 | 2019-08-12 | Centrally-mounted driving mechanism and power-assisted bicycle with same |
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| Publication Number | Publication Date |
|---|---|
| CN210882487U true CN210882487U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921301386.4U Active CN210882487U (en) | 2019-08-12 | 2019-08-12 | Centrally-mounted driving mechanism and power-assisted bicycle with same |
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| CN (1) | CN210882487U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282067A (en) * | 2019-08-12 | 2019-09-27 | 苏州万佳电器有限公司 | Driving mechanism is set in a kind of and with the moped for setting driving mechanism in this |
| CN113187863A (en) * | 2021-05-21 | 2021-07-30 | 常熟鑫利茗动力科技有限公司 | Power auxiliary system |
| US20220307582A1 (en) * | 2021-03-24 | 2022-09-29 | Techway Industrial Co.,Ltd. | Electric vehicle transmission mechanism and electric vehicle |
-
2019
- 2019-08-12 CN CN201921301386.4U patent/CN210882487U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110282067A (en) * | 2019-08-12 | 2019-09-27 | 苏州万佳电器有限公司 | Driving mechanism is set in a kind of and with the moped for setting driving mechanism in this |
| US20220307582A1 (en) * | 2021-03-24 | 2022-09-29 | Techway Industrial Co.,Ltd. | Electric vehicle transmission mechanism and electric vehicle |
| US11614157B2 (en) * | 2021-03-24 | 2023-03-28 | Techway Industrial Co., Ltd. | Electric vehicle transmission mechanism and electric vehicle |
| CN113187863A (en) * | 2021-05-21 | 2021-07-30 | 常熟鑫利茗动力科技有限公司 | Power auxiliary system |
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