CN203854815U - Middle-arranged power output mechanism for bicycle - Google Patents
Middle-arranged power output mechanism for bicycle Download PDFInfo
- Publication number
- CN203854815U CN203854815U CN201420169206.2U CN201420169206U CN203854815U CN 203854815 U CN203854815 U CN 203854815U CN 201420169206 U CN201420169206 U CN 201420169206U CN 203854815 U CN203854815 U CN 203854815U
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- China
- Prior art keywords
- gear
- support
- sheathed
- rotationally
- crank shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a middle-arranged power output mechanism for a bicycle. The middle-arranged power output mechanism for the bicycle comprises an enclosure, a crankshaft, a fluted disc base, a motor and a transmission unit; the fluted disc base is provided with a transmission external member capable of extending into the enclosure; the transmission unit comprises a first ring gear, a second ring gear, a sun wheel and a plurality of planetary wheels; the first ring gear is rotationally arranged in the enclosure and is connected to the transmission external member; the second ring gear is fixedly arranged in the enclosure; the sun wheel and a rotor are in unidirectional rotation connection relation; each planetary wheel is provided with a first tooth part and a second tooth part; the first tooth parts of all planetary wheels are meshed with the sun wheel and the second ring gear at the same time; the second tooth part of each planetary wheel is meshed with the first ring gear. Therefore, the transmission unit of the middle-arranged power output mechanism for the bicycle has the characteristics of high transmission ratio and small size.
Description
Technical field
The utility model is about a kind of power take-off mechanism of bicycle, particularly about a kind of mid-power take-off mechanism of bicycle.
Background technology
Traditional electric booster bicycle is to obtain by rider's the stampede power power-assisted that a power take-off mechanism (as mid-motor) provided of arranging in pairs or groups the power advancing, make electric booster bicycle can not cause too large burden to rider's muscle power, and can reach the effect of body-building again after leisure.
With regard to general mid-motor because spare part itself is many, so after assembling completes, be easy to be subject to each part Mismachining tolerance impact and cause producing in the running different sound or seismism.In order to address the above problem, No. 3974386 Patent Case of Japanese Patent disclosed " reduction gear of Vidacare corp " is a plurality of helical wheels to be set between motor force-output shaft and crank shaft reach the effect of eliminating Mismachining tolerance, but between these elements, be adopt disalignment to configuration, so can produce the problem that the volume of timber increases.
In order to take into account the object that reduces the volume of timber and eliminate the Mismachining tolerance between element, the applicant proposes TaiWan, China a few days ago No. M453636 " the mid-power take-off mechanism of electric booster bicycle " Patent Case, it is mainly single direction ratchet in the past and helical wheel to be integrated into sun wheel be used as main power transmits the component, reduces thus the volume of timber and takes into account the object of eliminating Mismachining tolerance.Blemish in an otherwise perfect thing be, its gear unit is to utilize satellite gear to be engaged between this sun wheel and a fixing Internal gear, then just by planet stent, output power to fluted disc, therefore its deceleration effect is limited, cannot adopt high-performance motor, and in order to increase reduction ratio, need to adopt the Internal gear with larger external diameter and the number of teeth, such design also can make the volume of gear unit increase.
Utility model content
In view of this, main purpose of the present utility model is to provide a kind of mounted in medium of bicycle power take-off mechanism that higher reduction ratio and gear unit take less volume that has.
In order to reach aforementioned and other objects, the utility model provides a kind of mounted in medium of bicycle power take-off mechanism, it comprises a casing, one crank shaft, one fluted disc pedestal, one motor and a gear unit, this crank shaft is arranged in this casing rotationally, this fluted disc base sleeve is located at this crank shaft and is unidirectional rotation connection relationship with this crank shaft, this fluted disc pedestal has the transmission external member stretching in this casing, this motor is located in this casing, and this motor has the rotor that a stator and that is fixedly arranged on this casing is sheathed on this crank shaft rotationally, this gear unit comprises a first ring gear, one second Internal gear, one sun wheel and several rows star-wheel, this first ring gear is located at rotationally in this casing and is connected in this transmission external member, this second Internal gear is fixedly arranged in this casing, this sun wheel and this rotor are unidirectional rotation connection relationship, respectively this satellite gear has one first tooth portion and one second tooth portion, respectively the first tooth portion of this satellite gear meshes with this sun wheel and the second Internal gear simultaneously, respectively the second tooth portion of this satellite gear and the engagement of this first ring gear.
Wherein, between this fluted disc pedestal and this crank shaft, be provided with one first single direction ratchet.
Wherein, between this sun wheel and this rotor, be provided with one second single direction ratchet.
Wherein, between this sun wheel and this rotor, be provided with one second single direction ratchet.
Wherein, this rotor is positioned at the radially inner side of this stator.
Wherein, this gear unit also comprises a planet stent, and this planet stent is sheathed on this crank shaft rotationally, and described satellite gear is located at this planet stent rotationally.
Wherein, this planet stent has one first support, one second support and some planets and is located between this first, second support, and described satellite gear is sheathed on respectively described planet axis and between this first, second support.
Wherein, this first bracket-rotatable is sheathed on this crank shaft movingly, and this second bracket-rotatable is sheathed on this sun wheel movingly.
Wherein, this gear unit also comprises a planet stent, and this planet stent is sheathed on this crank shaft rotationally, and described satellite gear is located at this planet stent rotationally.
Wherein, this planet stent has one first support, one second support and some planets and is located between this first, second support, described satellite gear is sheathed on respectively described planet axis and between this first, second support, this first bracket-rotatable is sheathed on this crank shaft movingly, and this second bracket-rotatable is sheathed on this sun wheel movingly.
The beneficial effects of the utility model: pass through previous designs, the power of motor sequentially exports fluted disc pedestal to via sun wheel, satellite gear and first ring gear, that is than the more than once deceleration of existing design (deceleration between satellite gear and first ring gear), therefore the reduction ratio of gear unit of the present utility model can significantly improve, so just, can use more high efficiency motor, simultaneously under many conditions of once slowing down, just can select to have first, second Internal gear of less external diameter and the number of teeth, therefore the shared volume of gear unit also can reduce.
Accompanying drawing explanation
Fig. 1 is the block diagram of the utility model preferred embodiment.
Fig. 2 is the exploded drawings of the utility model preferred embodiment.
Fig. 3 is the longitudinal sectional view of the utility model preferred embodiment.
Fig. 4 is the transverse sectional view of the utility model preferred embodiment, the unidirectional rotation connection relationship between main manifestations sun wheel and rotor.
Fig. 5 is the transverse sectional view of the utility model preferred embodiment, the meshing relation between main manifestations satellite gear and sun wheel and the second Internal gear.
Fig. 6 is the transverse sectional view of the utility model preferred embodiment, the meshing relation between main manifestations satellite gear and first ring gear.
[nomenclature]
Casing 10
The first housing 11
The second housing 12
Crank shaft 20
Fluted disc pedestal 30
Base body 31
Transmission external member 32
The first single direction ratchet 35
Motor 40
Stator 41
Rotor 42
Gear unit 50
First ring gear 51
The second Internal gear 52
Sun wheel 53
Satellite gear 54
The first tooth portion 541
The second tooth portion 542
The second single direction ratchet 55
Planet stent 56
The first support 561
The second support 562
Planet axis 563
The specific embodiment
Please refer to Fig. 1 to Fig. 3, in preferred embodiment of the present utility model, a kind of mounted in medium of bicycle power take-off mechanism comprises a casing 10, a crank shaft 20, a fluted disc pedestal 30, a motor 40 and a gear unit 50.
Casing 10 has the side that one first housing 11 and one second housing 12 are located at this first housing 11, between first, second housing 11,12, encloses structure one accommodation space, and first, second housing 11,12 has respectively an axis hole and passes for crank shaft 20.
Crank shaft 20 is arranged in this casing 10 rotationally, and its two ends pass the axis hole of casing 10 both sides, can connect for the crank (not illustrating) of bicycle.
Fluted disc pedestal 30 is sheathed on crank shaft 20 and is unidirectional rotation connection relationship with crank shaft 20, and " unidirectional rotation connection relationship " described herein refers to two elements interlock on a hand of rotation, and on another hand of rotation, two elements can relatively rotate.In order to realize the unidirectional rotation connection relationship between fluted disc pedestal 30 and crank shaft 20, between fluted disc pedestal 30 and crank shaft 20, can be provided with one first single direction ratchet 35 or other isolators.In the present embodiment, fluted disc pedestal 30 comprises a base body 31 and a transmission external member 32, and base body 31 can be for fluted disc (not illustrating) installing of bicycle, and 32 of transmission external members stretch in casing 10.In the present embodiment, transmission external member 32 is to utilize screw tightening and be connected with base body 31, but in other may embodiment, base body 31 can fix or be one-body molded by other fixing means with transmission external member 32.In addition, base body 31 also can be one-body molded with fluted disc.
Motor 40 is located in casing 10, and it has the rotor 42 that a stator 41 and that is fixedly arranged on casing 10 is sheathed on crank shaft 20 rotationally, and rotor 42 is positioned at the radially inner side of this stator 41, that is the motor 40 of the present embodiment is an inner rotor motor.
Gear unit 50 comprises a first ring gear 51, one second Internal gear 52, a sun wheel 53 and several rows star-wheel 54.First ring gear 51 is located at rotationally in casing 10 and is connected this transmission external member 32, can see through connecting element, flush fit, is embedded the mode such as even one-body molded and fixes between first ring gear 51 and transmission external member 32.The second Internal gear 52 is fixedly arranged in casing 10, can utilize between the two but be not limited to aforementioned manner and fix.Sun gear 53 is unidirectional rotation connection relationship with rotor 42, and as shown in Figure 4, between sun gear 53 and rotor 42, can be provided with one second single direction ratchet 55 or other isolators.Respectively this satellite gear 54 has one first tooth portion 541 and one second tooth portion 542, as shown in Figure 5, respectively the first tooth portion 541 of this satellite gear 54 meshes with sun wheel 53 and the second Internal gear 52 simultaneously, and separately as shown in Figure 6, respectively the second tooth portion 542 of this satellite gear 54 meshes with first ring gear 51.In order to allow each satellite gear 54 can accurately be located and improve the stability of running, gear unit 50 also can comprise a planet stent 56, and planet stent 56 is sheathed on crank shaft 20 rotationally, and described satellite gear 54 is located at this planet stent 56 rotationally.As a kind of preferably configuration mode, planet stent 56 can have one first support 561, one second support 562 and some planet axis 563 and be located between first, second support 561,562,54 of described satellite gears are sheathed on respectively described planet axis 563 and between first, second support 561,562, wherein the first support 561 is sheathed on rotationally between crank shaft 20, the first supports 561 and crank shaft 20 and can be provided with bearing; The second 562, support is sheathed between these sun wheel 53, the second supports 562 and sun wheel 53 rotationally also can be provided with bearing.Certainly, the form of planet stent 56 is not limited with the present embodiment those shown.
Pass through previous designs, the power of motor 40 will be sequentially via sun wheel 53, satellite gear 54 and first ring gear 51 and be passed to fluted disc pedestal 30 and make its rotation, now satellite gear 54 is except rotation, also will revolve round the sun around sun wheel 53, its medium power is in sun wheel 53, between the first tooth portion 541 of satellite gear 54 and the second Internal gear 52, slow down for the first time, then between the second tooth portion 542 of satellite gear 54 and first ring gear 51, slow down for the second time, therefore gear unit 50 of the present utility model has higher reduction ratio, therefore and can select high-performance motor 40 and compared with first of path, the second Internal gear 51, 52, the volume-diminished that gear unit 50 is taken.
In the close beta of carrying out applicant, the reduction ratio of the gear unit of M453636 patent is only 9.6, the reduction ratio of reviewing the deceleration unit of this preferred embodiment can reach 22.1, both diameters are 132:107 than, these simulations fully show the utility model and compared to existing design, have the reduction ratio of remarkable lifting, can also dwindle in the lump the volume of gear unit, be the significant optimal design of an effect really.
Finally, must again illustrate, the utility model is only casehistory in front taking off disclosed composed component in embodiment, is not used for limiting scope of the present utility model, substituting or changing of other equivalence elements, also should be claim scope of the present utility model and contains.
Claims (10)
1. a mounted in medium of bicycle power take-off mechanism, is characterized in that, comprising:
One casing;
One crank shaft, can be arranged in this casing rotationally;
One fluted disc pedestal, is sheathed on this crank shaft and is unidirectional rotation connection relationship with this crank shaft, and this fluted disc pedestal has the transmission external member stretching in this casing;
One motor, is located in this casing, and this motor has the rotor that a stator and that is fixedly arranged on this casing can be sheathed on this crank shaft rotationally; And
One gear unit, comprise a first ring gear, one second Internal gear, a sun wheel and several rows star-wheel, this first ring gear can be located at rotationally in this casing and be connected in this transmission external member, this second Internal gear is fixedly arranged in this casing, this sun wheel and this rotor are unidirectional rotation connection relationship, respectively this satellite gear has one first tooth portion and one second tooth portion, respectively the first tooth portion of this satellite gear meshes with this sun wheel and the second Internal gear simultaneously, respectively the second tooth portion of this satellite gear and the engagement of this first ring gear.
2. mounted in medium of bicycle power take-off mechanism as claimed in claim 1, is characterized in that, is provided with one first single direction ratchet between this fluted disc pedestal and this crank shaft.
3. mounted in medium of bicycle power take-off mechanism as claimed in claim 1, is characterized in that, is provided with one second single direction ratchet between this sun wheel and this rotor.
4. mounted in medium of bicycle power take-off mechanism as claimed in claim 2, is characterized in that, is provided with one second single direction ratchet between this sun wheel and this rotor.
5. the mounted in medium of bicycle power take-off mechanism as described in any one in claim 1 to 4, is characterized in that, this rotor is positioned at the radially inner side of this stator.
6. the mounted in medium of bicycle power take-off mechanism as described in any one in claim 1 to 4, is characterized in that, this gear unit also comprises a planet stent, and this planet stent can be sheathed on this crank shaft rotationally, and described satellite gear can be located at this planet stent rotationally.
7. mounted in medium of bicycle power take-off mechanism as claimed in claim 6, it is characterized in that, this planet stent has one first support, one second support and some planets and is located between this first, second support, and described satellite gear is sheathed on respectively described planet axis and between this first, second support.
8. mounted in medium of bicycle power take-off mechanism as claimed in claim 7, is characterized in that, this first support can be sheathed on this crank shaft rotationally, and this second support can be sheathed on this sun wheel rotationally.
9. mounted in medium of bicycle power take-off mechanism as claimed in claim 5, is characterized in that, this gear unit also comprises a planet stent, and this planet stent can be sheathed on this crank shaft rotationally, and described satellite gear can be located at this planet stent rotationally.
10. mounted in medium of bicycle power take-off mechanism as claimed in claim 9, it is characterized in that, this planet stent has one first support, one second support and some planets and is located between this first, second support, described satellite gear is sheathed on respectively described planet axis and between this first, second support, this first support can be sheathed on this crank shaft rotationally, and this second support can be sheathed on this sun wheel rotationally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420169206.2U CN203854815U (en) | 2014-04-09 | 2014-04-09 | Middle-arranged power output mechanism for bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420169206.2U CN203854815U (en) | 2014-04-09 | 2014-04-09 | Middle-arranged power output mechanism for bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203854815U true CN203854815U (en) | 2014-10-01 |
Family
ID=51604685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420169206.2U Expired - Fee Related CN203854815U (en) | 2014-04-09 | 2014-04-09 | Middle-arranged power output mechanism for bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203854815U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107187540A (en) * | 2016-03-15 | 2017-09-22 | 健腾精密机电股份有限公司 | Motor speed reducer |
-
2014
- 2014-04-09 CN CN201420169206.2U patent/CN203854815U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107187540A (en) * | 2016-03-15 | 2017-09-22 | 健腾精密机电股份有限公司 | Motor speed reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20170409 |