CN117842257A - Quick-mounting type large-reduction-ratio electric power assisting middle motor assembly - Google Patents
Quick-mounting type large-reduction-ratio electric power assisting middle motor assembly Download PDFInfo
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- CN117842257A CN117842257A CN202410189992.0A CN202410189992A CN117842257A CN 117842257 A CN117842257 A CN 117842257A CN 202410189992 A CN202410189992 A CN 202410189992A CN 117842257 A CN117842257 A CN 117842257A
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Abstract
The invention relates to the technical field of electric power assisting middle motor assemblies, in particular to a quick-mounting type large-reduction-ratio electric power assisting middle motor assembly. The technical proposal comprises: the motor shell comprises a first shell and a second shell which are assembled in a butt joint way, the second shell is detachably connected with one end of a bicycle five-way pipe, and the other end of the bicycle five-way pipe is connected with a lock nut; the speed reducing and boosting mechanism comprises an epicycloidal wheel, a hypocycloidal wheel, a cycloidal output wheel and a motor stator and a motor rotor which are coaxially arranged with the epicycloidal wheel, the hypocycloidal wheel and the cycloidal output wheel to reduce the axial thickness of the motor assembly. The device can be installed at the five-way pipe by dismantling the middle shaft, the crank and the pedals of the original bicycle on the basis of the traditional bicycle, so that the electric booster bicycle driving system is built; the motor rotor, the motor stator and other driving structures are coaxially arranged with the speed reducing mechanisms such as the epicycloidal wheel, the intermediate cycloidal wheel and the cycloidal output wheel, and the axial thickness of the motor assembly can be reduced.
Description
Technical Field
The invention relates to the technical field of electric power-assisted bicycle middle motor assemblies, in particular to a quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly.
Background
Electric power assisted bicycles are used as personal green travel vehicles, which are realized by adding a power driving system to a traditional bicycle. The power driving system selects a motor driving system, and the motor driving system is applied to a bicycle and adopts a hub motor assembly or a middle motor assembly. The hub motor assembly is generally arranged on the rear wheel and a small part of the hub motor assembly is also arranged on the front wheel, and the advantages are that excessive adjustment of a frame of a bicycle is not needed, but the power scheme needs to be used for re-programming hub spokes, and meanwhile a speed change system of the bicycle cannot be applied. The middle motor assembly is an independent electric drive system, components such as a motor, a speed reduction device, a controller, a sensor and the like are integrated in the middle motor assembly, the middle motor assembly is directly arranged at the five-way position of the bicycle, and meanwhile, a speed change system using a rear wheel can be continuously configured, so that the vehicle has larger and more flexible use scenes, and the frame is required to be redesigned due to the overlarge volume.
For an individual user, if the user wants to conveniently experience the electric bicycle based on the existing bicycle, the two schemes are inconvenient to realize because the two schemes involve refitting the bicycle. Therefore, the invention provides a quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly.
Disclosure of Invention
The invention aims to solve the problems in the background art and provides a quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly.
The technical scheme of the invention is as follows: a quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly comprises a motor shell, a reduction power-assisted mechanism arranged in the motor shell and a pedal shaft linked with the reduction power-assisted mechanism; the motor shell comprises a first shell and a second shell which are assembled in a butt joint way, the second shell is detachably connected with one end of a five-way pipe of a bicycle, and the other end of the five-way pipe of the bicycle is used for performing auxiliary positioning on a central shaft of the assembly through a lock nut so as to perform fixed connection on the central motor assembly;
the speed reducing and boosting mechanism comprises an epicycloidal wheel, a hypocycloidal wheel, a cycloidal output wheel and a motor stator and a motor rotor which are coaxially arranged with the epicycloidal wheel, the hypocycloidal wheel and the cycloidal output wheel to reduce the axial thickness of the motor assembly.
Preferably, the intermediate cycloidal gear and the epicyclic gear do planetary rotation.
Optionally, the speed reducing and assisting mechanism comprises an output wheel, and the output wheel is mounted on the first shell through a second bearing.
Optionally, the device comprises a dental tray, wherein the dental tray is fixedly connected with the output wheel.
Optionally, the device comprises a torque sensor which is sleeved on the pedal shaft and fixedly connected with one end of the pedal shaft through an internal deformation sleeve.
Optionally, the speed-reducing and power-assisting mechanism comprises an adapter sleeve, and the adapter sleeve is connected to the end part of the torsion sensor.
Optionally, the adapter sleeve is sleeved with the output wheel through a first one-way clutch integrated bearing.
Optionally, the output wheel is sleeved with the cycloidal output wheel through a second one-way clutch integrated bearing.
Optionally, the output wheel is sleeved with the pedal shaft through a third bearing.
Optionally, the motor rotor and the motor shell are supported to rotate through a fourth bearing and a first bearing, and the motor rotor and the intermediate cycloid gear are supported to rotate through a fifth bearing;
the motor stator is fixedly arranged in the first shell or the second shell.
Compared with the prior art, the invention has the following beneficial technical effects:
the device can be installed at the five-way pipe by dismantling the middle shaft, the crank and the pedals of the original bicycle on the basis of the traditional bicycle, so that the electric booster bicycle driving system is built;
further, the motor rotor, the motor stator and other driving structures are coaxially arranged with the epicycloidal wheel, the intermediate cycloidal wheel, the cycloidal output wheel and other reducing mechanisms, so that the axial thickness of the motor assembly can be reduced, the double cycloidal gear reducing mechanism can obtain larger transmission ratio in a small space, and meanwhile, the small space can reduce air vibration and noise and can be better arranged at the five-way pipe.
Drawings
FIG. 1 is a schematic diagram of a quick-mount high-reduction-ratio electric-assist center motor assembly;
FIG. 2 is a schematic illustration of the connection of the motor assembly of FIG. 1 to a bicycle five-way tube;
FIG. 3 is a perspective cross-sectional view of FIG. 2;
FIG. 4 is a schematic plan view of FIG. 3;
FIG. 5 is a schematic diagram of a separate structure of the motor housing and the bicycle five-way tube;
FIG. 6 is a schematic diagram of the separation structure of FIG. 1;
fig. 7 is a plan sectional view of a quick-install large-reduction-ratio electric power-assisted center motor assembly.
Reference numerals: 1. five-way pipe of bicycle; 11. an internal thread;
2. a lock nut;
3. a pedal shaft;
4. a motor housing; 41. a first housing; 42. a second housing; 421. an external thread;
5. a dental tray;
6. a deceleration booster mechanism; 61. an outer balance; 62. a middle cycloidal gear; 63. cycloidal output wheels; 64. a motor stator; 65. magnetic steel; 66. a motor rotor; 67. a first bearing; 68. an output wheel; 69. a second bearing; 610. an adapter sleeve; 611. a first one-way clutch integral bearing; 612. a second one-way clutch integral bearing; 613. a third bearing; 614. a fourth bearing; 615. a fifth bearing; 616. a sixth bearing;
7. a torque sensor deformation sleeve;
8. a torsion sensor.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in figures 1-7, the invention provides a quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly.
Comprises a motor housing 4, wherein the motor housing 4 is formed by mutually butting a first housing 41 and a second housing 42. The second casing 42 is provided with external threads 421, both ends of the bicycle five-way pipe 1 are provided with internal threads 11, and the internal threads 11 positioned at one end of the bicycle five-way pipe are screwed with the external threads 421, so that the motor assembly can be quickly installed on the bicycle five-way pipe 1. The internal thread 11 at the other end of the bicycle five-way pipe 1 is screwed with the lock nut 2 to further fasten the installation of the motor assembly on the bicycle five-way pipe 1;
in the present embodiment, the speed reducing and assisting mechanism 6 includes an epicycloidal gear 61, an intermediate cycloid gear 62, a cycloid output gear 63, a motor stator 64, magnetic steel 65, a motor rotor 66, a first bearing 67, an output gear 68, a second bearing 69, an adapter sleeve 610, a first one-way clutch integrated bearing 611, a second one-way clutch integrated bearing 612, a third bearing 613, a fourth bearing 614, a fifth bearing 615, and a sixth bearing 616.
Specifically, the motor stator 64 is fixedly mounted in the first housing 41 or the second housing 42, and the motor rotor 66 is mounted to the second housing 42 via the first bearing 67 and the fourth bearing 614. In the present embodiment, the motor rotor 66 and the motor stator 64 are coaxially arranged and positioned on the outer rings of the below-described epicycloidal wheel 61, intermediate cycloidal wheel 62 and cycloidal output wheel 63, so that the axial thickness of the whole assembly can be reduced;
specifically, referring to fig. 7, the epicycloidal wheel 61 is fixed on the first housing 41, the output end of the electronic rotor 66 is eccentrically disposed, and one end of the intermediate cycloid wheel 62 is mounted on the eccentric output end of the electronic rotor 66 through the fifth bearing 615. While the other end of the intermediate cycloidal gear 62 is connected to an output cycloidal gear 63. When the motor rotor 66 rotates, the motor rotor 66 drives the intermediate cycloid gear 62 to perform planetary reduction relative to the epicycloidal gear 61, and simultaneously, the intermediate cycloid gear 62 drives the cycloid output gear 63 to perform reduction rotation, and the cycloid output gear 63 is output to the output gear 68 through the second one-way clutch integrated bearing 612.
The output wheel 68 is mounted in a fixed position on the pedal shaft 3 by means of a third bearing 613 and is in rotational connection with the first housing 41 by means of a second bearing 69. The output wheel 68 is coupled to the cycloid output wheel 63 through a second one-way clutch-integrated bearing 612, and the output wheel 68 is coupled to an adapter sleeve 610 described below through a first one-way clutch-integrated bearing 611. And, the crankset 5 is fixedly coupled to the output wheel 68 by bolts or splines, the crankset 5 being used to connect a bicycle chain.
In this embodiment, the torque sensor deformation sleeve 7 is a functional component of the torque sensor 8, one end of the torque sensor deformation sleeve 7 far away from the power-assisted speed reducing mechanism is sleeved with the pedal shaft 3 and limited by a spline structure or other structures, and the torque sensor 8 is fixedly connected with the second housing 42; the adapter sleeve 610 is sleeved with the torque sensor deformation sleeve 7 and limited by a spline structure or other structures. One end of the pedal shaft 3 is connected with a sixth bearing 616, and the sixth bearing 616 is located inside the lock nut 2 to support one end of the pedal shaft 3, and the other end of the pedal shaft 3 is connected with the output wheel 68 through the third bearing 613, so that the support to the other end of the pedal shaft 3 is formed, and smooth rotation of the pedal shaft 3 is ensured. Thus, when the pedal shaft 3 rotates, the torque sensor deformation sleeve 7 is connected to the pedal shaft 3 at one end, so that the torque sensor deformation sleeve 7 is twisted, a torsion signal is acquired and processed by the torsion sensor 8, and the torsion signal is output to an external motor controller for motor motion control.
In the present embodiment, the first one-way clutch-integrated bearing 611 and the second one-way clutch-integrated bearing 612 have both functions of clutch and bearing, i.e., function as both support and one-way coupling.
The working principle of the embodiment is divided into different driving modes, and the driving modes are as follows:
the two one-way clutches arranged in the decelerating and boosting mechanism can be automatically engaged and disengaged according to the conditions of motor driving and manpower driving, so that a motionless movement mode is realized.
When the electric booster is driven: when the motor rotor 66 rotates, the intermediate cycloid gear 62 can be driven to planetary rotate relative to the epicycloidal gear 61 through the eccentric structure, and meanwhile, the intermediate cycloid gear 62 drives the cycloid output gear 63 to output rotation. At this time, the second one-way clutch integrated bearing 612 is in an engaged state, and the rotation of the cycloidal output wheel 63 can drive the output wheel 68 to rotate, and the output wheel 68 drives the chain wheel 5 to rotate, so that the bicycle chain is driven to rotate, and the running is realized; at this time, the first one-way clutch-integrated bearing 611 is disengaged, and therefore, the power of the motor does not rotate the pedal shaft 3.
When the manpower is driving: the pedal shaft 3 is driven to rotate by manpower riding, and the pedal shaft 3 drives the output wheel 68 and the dental disk 5 to rotate through the deformation sleeve 7, the adapter sleeve 610 and the first one-way clutch integrated bearing 611 so as to realize the forward running of the bicycle. In this process, since one end of the torque sensor deformation sleeve 7 is connected with the pedal shaft 3, the torque sensor deformation sleeve 7 can form torsion, and torsion signals are collected and processed through the torsion sensor 8 and output to an external motor controller for motor motion control. Specifically, during riding by a person, the first one-way clutch-integrated bearing 611 is engaged, and the rotation of the pedal shaft 3 is transmitted to the output wheel 68 through the adapter sleeve 610 connected to the torque sensor deformation sleeve 7. At this time, the second one-way clutch-integrated bearing 612 is in a disengaged state, and the rotation of the output wheel 68 does not rotate the cycloid output wheel 63. Namely, the stepping motion of manpower can not drive the speed reducing mechanism and the motor part in the motor to rotate; realize the less resistance of trampling when the manpower tramples.
When the human power is applied to reverse the pedal, the first one-way clutch-integrated bearing 611 is in a disengaged state, that is, the output wheel 68 is not rotated by the rearward movement of the pedal shaft 3.
The above-described embodiments are merely a few alternative embodiments of the present invention, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present invention and the related teachings of the above-described embodiments.
Claims (10)
1. A quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly comprises a motor shell (4), a reduction power-assisted mechanism (6) mounted in the motor shell (4) and a pedal shaft (3) linked with the reduction power-assisted mechanism (6);
the method is characterized in that: the motor shell (4) comprises a first shell (41) and a second shell (42) which are assembled in a butt joint way, the second shell (42) is detachably connected with one end of a bicycle five-way pipe (1), and the other end of the bicycle five-way pipe (1) is connected with a lock nut (2);
the speed reduction and power assisting mechanism (6) comprises an epicycloidal wheel (61), a middle cycloidal wheel (62), a cycloidal output wheel (63), and a motor stator (64) and a motor rotor (66) which are coaxially arranged with the epicycloidal wheel, the cycloidal output wheel and the motor stator to reduce the axial thickness of the motor assembly.
2. The quick-mounting type large-reduction-ratio electric power-assisted center motor assembly according to claim 1, wherein the intermediate cycloidal gear (62) and the epicyclic gear (61) perform planetary rotation.
3. A quick-fit large reduction ratio electric power-assisted center motor assembly according to claim 2, characterized in that the reduction power-assisted mechanism (6) comprises an output wheel (68), the output wheel (68) being mounted to the first housing (41) by means of a second bearing (69).
4. A quick-mounting large-reduction-ratio electric power-assisted center motor assembly according to claim 3, comprising a toothed disc (5), wherein the toothed disc (5) is fixedly connected with an output wheel (68).
5. The quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly according to claim 4 is characterized by comprising a torque sensor deformation sleeve (7) sleeved on a pedal shaft (3) and a torque sensor (8).
6. The quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly according to claim 5, wherein the reduction power assisting mechanism (6) comprises an adapter sleeve (610), and the adapter sleeve (610) is connected to the end part of the torque sensor deformation sleeve (7).
7. The quick-mounting large-reduction-ratio electric power-assisted center motor assembly according to claim 6, wherein the adapter sleeve (610) is sleeved with the output wheel (68) through a first one-way clutch integrated bearing (611).
8. The quick-mount high reduction ratio electric assist center motor assembly as set forth in claim 7 wherein said output wheel (68) is sleeved with a cycloidal output wheel (63) through a second one-way clutch integral bearing (612).
9. The quick-mounting type large-reduction-ratio electric power-assisted middle motor assembly according to claim 8, wherein the output wheel (68) is sleeved with the pedal shaft (3) through a third bearing (613).
10. The quick-mount high-reduction-ratio electric power-assisted center motor assembly according to claim 9, wherein the motor rotor (66) is rotatably supported and connected with the second housing (42) through a fourth bearing (614) and a first bearing (67), and the motor rotor (66) and the intermediate cycloid gear (62) are rotatably supported through a fifth bearing (615);
the motor stator (64) is fixedly mounted in the first housing (41) or the second housing (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410189992.0A CN117842257A (en) | 2024-02-20 | 2024-02-20 | Quick-mounting type large-reduction-ratio electric power assisting middle motor assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410189992.0A CN117842257A (en) | 2024-02-20 | 2024-02-20 | Quick-mounting type large-reduction-ratio electric power assisting middle motor assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117842257A true CN117842257A (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410189992.0A Pending CN117842257A (en) | 2024-02-20 | 2024-02-20 | Quick-mounting type large-reduction-ratio electric power assisting middle motor assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117842257A (en) |
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- 2024-02-20 CN CN202410189992.0A patent/CN117842257A/en active Pending
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