CN111409760A - Clutch type electric bicycle chain wheel driving mechanism - Google Patents
Clutch type electric bicycle chain wheel driving mechanism Download PDFInfo
- Publication number
- CN111409760A CN111409760A CN202010393472.3A CN202010393472A CN111409760A CN 111409760 A CN111409760 A CN 111409760A CN 202010393472 A CN202010393472 A CN 202010393472A CN 111409760 A CN111409760 A CN 111409760A
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- Prior art keywords
- chain wheel
- end disc
- wheel
- outer end
- motor
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- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000001611 motor endplate Anatomy 0.000 description 1
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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
- 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
- B62M6/60—Rider propelled cycles with auxiliary electric motor power-driven at axle parts
-
- 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
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention discloses a clutch type electric bicycle chain wheel driving mechanism which comprises a wheel shaft, a motor end disc, a chain wheel, an outer end disc and a return spring, wherein the outer end disc, the chain wheel and the motor end disc are sequentially arranged on the wheel shaft from outside to inside; a ring of teeth are arranged on the outer end face of the motor end disc; the chain wheel and the wheel shaft are rotatably arranged and in clearance sliding fit, and the chain wheel can axially slide along the wheel shaft; a locking column matched with teeth of the motor end disc is arranged on one surface of the chain wheel opposite to the motor end disc; a ratchet and pawl mechanism for driving the chain wheel to approach the motor end disc is arranged between the chain wheel and the outer end disc; the return spring is arranged between the chain wheel and the motor end disc and provides restoring force for the chain wheel to separate from the motor end disc. The chain wheel can be meshed with the motor wheel for transmission only in a riding state, so that the working time of the chain wheel is greatly reduced, and the service life of the chain wheel is prolonged; and the running noise of the chain wheel is reduced, and the follow-up rotation is avoided.
Description
Technical Field
The invention belongs to the technical field of electric bicycles, and particularly relates to a clutch type chain wheel driving mechanism of an electric bicycle.
Background
Referring to fig. 6 and 7, in the conventional rear wheel driving structure of a bicycle, a motor wheel is mounted on a rear wheel shaft a, a threaded hole b-1 for mounting a flywheel (i.e., a sprocket) is formed in a motor end disc b of the motor wheel, a flywheel c is mounted on the threaded hole through threads to be fixedly mounted with the motor wheel, a circle of teeth is formed on an outer ring of the flywheel, so that the outer ring of the flywheel is linked with a crank wheel disc through a chain to realize chain transmission, and a ratchet and pawl structure is adopted in the flywheel to ensure unidirectional transmission of riding, so that the following problems exist in the flywheel driving structure:
1. the flywheel runs along with the motor wheel all the time, the working time of the flywheel is greatly prolonged, and the ratchet wheel and pawl structure in the flywheel is arranged to ensure the one-way transmission of riding, so that the ratchet wheel and pawl structure in the flywheel is easy to damage, and the service life of the flywheel is short.
2. After the flywheel is aged for long-time work, the condition of crank follow-up rotation easily occurs (when a motor wheel operates, the inner aging friction force of the flywheel is increased, the outer ring of the flywheel can be driven to rotate, then the outer ring of the flywheel drives a chain to rotate, and the chain drives the crank to follow-up rotation), the crank follow-up rotation can cause a power-assisted sensor of the vehicle to send a power-assisted signal to a controller, the controller mistakenly uses a power-assisted function for a client, the runaway is caused, and hidden dangers are brought to the safety of the client.
3. After the flywheel works and ages for a long time, when the motor wheel drives the flywheel to operate, large noise can be generated.
4. The flywheel is installed on the motor end disc through threads, and the flywheel is easy to withdraw after long-time running, so that potential safety hazards are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a clutch type electric bicycle chain wheel driving mechanism.
The invention is realized by the following technical scheme:
a clutch type electric bicycle chain wheel driving mechanism comprises a wheel shaft, a motor end disc, a chain wheel, an outer end disc and a return spring, wherein the outer end disc, the chain wheel and the motor end disc are sequentially arranged on the wheel shaft from outside to inside;
a ring of teeth are arranged on the outer end face of the motor end disc;
the chain wheel and the wheel shaft are rotatably arranged and in clearance sliding fit, and the chain wheel can axially slide along the wheel shaft; a locking column matched with teeth of the motor end disc is arranged on one surface of the chain wheel opposite to the motor end disc;
a ratchet and pawl mechanism is arranged between the chain wheel and the outer end disc, and when the chain wheel runs in the forward direction, the chain wheel is driven to approach the motor end disc through the ratchet and pawl mechanism, so that the transmission meshing of the chain wheel and the motor end disc is realized;
the reset spring is arranged between the chain wheel and the motor end disc and provides restoring force for the chain wheel to be separated from the motor end disc.
In the above technical solution, the outer end disc is fixedly mounted on the wheel shaft by a thread.
In the technical scheme, the inner surface of the outer end disc is provided with the pawl, and the outer end surface of the chain wheel is provided with a circle of ratchet teeth.
In the technical scheme, the top action surface of the pawl and the tooth surface of the ratchet are mutually matched inclined surfaces.
In the technical scheme, the tooth space between the teeth on the end disc of the motor is larger than the diameter of the locking column, so that the locking column can smoothly enter the teeth, and each tooth on the end disc of the motor is obliquely arranged, so that the locking column can continuously enter the tooth root under the self-oblique guiding action of the tooth even if the chain wheel loses the driving action of the ratchet pawl mechanism along with the running of the chain wheel after the locking column just enters the teeth.
In the above-described embodiments, the number of the locking posts on the sprocket is not limited to one, and may be plural.
In the above technical solution, the specific structure of the sprocket is: the wheel axle bearing device comprises a cylinder body, wherein a circle of baffle wall is arranged on the inner wall of the cylinder body, a bearing is arranged in a cylinder cavity on the outer side of the baffle wall, the bearing is arranged on a wheel axle through the bearing, and the bearing and the wheel axle are in clearance fit and can axially slide along the wheel axle; the inner side cylinder cavity of the blocking wall is used for mounting the return spring; a circle of chain teeth are arranged on the outer wall of the cylinder body and used for mounting a chain; the outer end of the barrel is provided with a ratchet, and the outer wall of the inner end of the barrel is provided with the locking column.
In the technical scheme, the inner surface of the outer end disc is provided with a mounting groove for mounting the pawl, and the pawl is mounted in the mounting groove through a torsion spring.
In the technical scheme, the outer end disc is provided with the protective cover, and the protective cover covers the ratchet pawl to play a role in dust prevention.
The invention has the advantages and beneficial effects that:
1. the sprocket of the present invention does not risk the escape of the wire.
2. The chain wheel can be meshed with the motor wheel for transmission only in a riding state, so that the working time of the chain wheel is greatly reduced, and the service life of the chain wheel is prolonged; and the running noise of the chain wheel is reduced, and the follow-up rotation is avoided.
3. The chain wheel is internally provided with the ratchet wheel and pawl mechanism, so that the working stability and the service life of the chain wheel are improved.
4, the chain wheel of the invention is directly installed on the wheel shaft, and compared with the traditional chain wheel which is installed on the threaded opening of the motor end disc, the inner diameter of the chain wheel is smaller, therefore, the size of the chain wheel is favorably reduced, and the design of the vehicle model is more beautiful.
Drawings
Fig. 1 is a schematic perspective view of a clutch type electric bicycle chain wheel driving mechanism according to the present invention.
FIG. 2 is a cross-sectional view of the clutch type electric bicycle sprocket drive mechanism of the present invention.
Fig. 3 is a partial enlarged view of the ratchet pawl of the present invention.
Fig. 4 is a schematic view of the outer disk of the present invention after a protective cover is provided thereon.
FIG. 5 is a schematic structural view of the present invention with the pawl and ratchet constraint between the sprocket and the outer end disc lost.
FIG. 6 is a schematic view of a prior art bicycle motor wheel.
FIG. 7 is a schematic view of a prior art bicycle motor wheel and flywheel mounting arrangement.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the present invention is further described below with reference to specific examples.
Example one
Referring to the attached drawings 1-2, the clutch type electric bicycle chain wheel driving mechanism comprises a wheel shaft 1, a motor end disc 2, a chain wheel 3, an outer end disc 4 and a return spring 5.
The motor end disc 2 is rotatably arranged on the wheel shaft 1, and a ring of teeth 2-1 are arranged on the outer end face of the motor end disc.
The chain wheel 3 is arranged on the wheel shaft 1, the chain wheel 3 is positioned on the outer side of the motor end disc 2, the chain wheel 3 and the wheel shaft 1 are rotatably arranged, the chain wheel 3 and the wheel shaft 1 are in clearance sliding fit, and the chain wheel can axially slide along the wheel shaft; the opposite side of the chain wheel 3 and the motor end disc 2 is provided with a locking column 3-1 matched with teeth 2-1 of the motor end disc, and the locking column can be placed between the teeth of the motor end disc, so that the chain wheel 3 and the motor end disc 2 are meshed in a transmission mode.
The outer end disc 4 is fixedly installed on the wheel shaft 1 through threads, the outer end disc 4 is located on the outer side of the chain wheel 3, a ratchet and pawl mechanism is arranged between the chain wheel 3 and the outer end disc 4, when the chain wheel 3 operates in the forward direction, the chain wheel 3 is driven to be close to the motor end disc 2 through the ratchet and pawl mechanism, and then transmission meshing of the chain wheel 3 and the motor end disc 2 is achieved.
The return spring 5 is arranged between the chain wheel 3 and the motor end disc 2, and provides restoring force towards the direction of the outer end disc 4 for the chain wheel 3 through the return spring 5.
Further, the inner surface of the outer end disc 4 (i.e. the surface of the outer end disc 4 opposite to the chain wheel 3) is provided with a pawl 4-1, and the outer end surface of the chain wheel 3 is provided with a circle of ratchet teeth 3-2. The number of the pawls 4-1 is not limited to one, and may be plural; referring to fig. 3, the top action surface of the pawl 4-1 and the tooth surface of the ratchet 3-2 are mutually matched inclined surfaces, when the chain wheel 3 is driven to run in the positive direction, a relative repulsive force is generated between the top action surface of the pawl 4-1 and the ratchet 3-2, and therefore the chain wheel is driven to move along the wheel shaft 1 to the motor end plate 2.
Furthermore, the tooth space between the teeth on the motor end disc 2 is slightly larger than the diameter of the locking column 3-1, so that the locking column can smoothly enter the tooth space, and each tooth on the motor end disc is obliquely arranged, so that the locking column 3-1 can continuously enter the tooth root under the self-oblique guiding action of the tooth even if the chain wheel 3 loses the driving action of the ratchet and pawl mechanism along with the operation of the chain wheel after the locking column just enters the tooth space.
Further, the number of the locking posts 3-1 on the sprocket 3 is not limited to one, and may be plural.
Furthermore, a circle of screw holes (not shown in the figure) are formed in the motor end disc 2 and are used for being connected with the motor wheel body through bolts.
Further, the specific structure of the sprocket 3 is as follows: the device comprises a cylinder body, wherein a circle of baffle wall 3-4 is arranged on the inner wall of the cylinder body, a bearing 3-5 is arranged in a cylinder cavity at the outer side of the baffle wall, the bearing is arranged on a wheel shaft 1 through the bearing, and the bearing and the wheel shaft are in clearance fit and can axially slide along the wheel shaft; the inner side cylinder cavity of the blocking wall is used for installing the return spring 5; a circle of chain teeth 3-3 for mounting a chain are arranged on the outer wall of the cylinder body; ratchets 3-2 are machined at the outer end of the cylinder body (namely, the end of the cylinder body opposite to the outer end disc), and locking columns 3-1 are arranged on the outer wall of the inner end of the cylinder body (namely, the outer wall of the end of the cylinder body opposite to the motor end disc).
Furthermore, the inner surface of the outer end disc is provided with a mounting groove for mounting the pawl, and the pawl is mounted in the mounting groove through a torsion spring.
Further, referring to fig. 4, a protective cover 4-2 is arranged on the outer end disc, and covers the ratchet pawl to play a role in dust prevention.
Example two
The operation method of the clutch type electric bicycle chain wheel driving mechanism is as follows:
when riding passerby and riding forward, chain drive sprocket forward operation, during sprocket forward operation, pawl on the outer end dish can drive sprocket and be close to the motor end dish, make the locking post on the sprocket get into between the tooth of motor end dish, along with the continuation forward operation of sprocket, the locking post gets into tooth root department under the self guide effect of tooth, lose pawl ratchet restraint (see figure 5) between sprocket and the outer end dish this moment, do not influence the continuation operation of follow-up sprocket, and then the whole motor wheel operation of sprocket drive, the automobile body moves ahead.
After the rider stops riding, the chain wheel moves outwards under the action of the reset spring to be disengaged from the transmission of the teeth of the motor end disc, and the motor wheel does not drive the chain wheel to synchronously operate at the moment, so that the working time of the bearing in the chain wheel is reduced, and the service life of the chain wheel is greatly prolonged.
When the rider tramples the pedal backwards, the chain drives the chain wheel to run reversely, the ratchet on the chain wheel presses down the pawl on the outer end disc at the moment, and the pawl cannot limit the direction rotation of the chain wheel.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The invention has been described in an illustrative manner, and it is to be understood that any simple variations, modifications or other equivalent changes which can be made by one skilled in the art without departing from the spirit of the invention fall within the scope of the invention.
Claims (9)
1. The utility model provides a separation and reunion formula electric bicycle sprocket actuating mechanism which characterized in that: the device comprises a wheel shaft, a motor end disc, a chain wheel, an outer end disc and a return spring, wherein the outer end disc, the chain wheel and the motor end disc are sequentially arranged on the wheel shaft from outside to inside;
a ring of teeth are arranged on the outer end face of the motor end disc;
the chain wheel and the wheel shaft are rotatably arranged and in clearance sliding fit, and the chain wheel can axially slide along the wheel shaft; a locking column matched with teeth of the motor end disc is arranged on one surface of the chain wheel opposite to the motor end disc;
a ratchet and pawl mechanism is arranged between the chain wheel and the outer end disc, and when the chain wheel runs in the forward direction, the chain wheel is driven to approach the motor end disc through the ratchet and pawl mechanism, so that the transmission meshing of the chain wheel and the motor end disc is realized;
the reset spring is arranged between the chain wheel and the motor end disc and provides restoring force for the chain wheel to be separated from the motor end disc.
2. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the outer end disc is fixedly arranged on the wheel shaft through threads.
3. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the inner surface of the outer end disc is provided with a pawl, and the outer end surface of the chain wheel is provided with a circle of ratchets.
4. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the top action surface of the pawl and the tooth surface of the ratchet are mutually matched inclined surfaces.
5. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the tooth space between the teeth on the end disc of the motor is larger than the diameter of the locking column, and each tooth on the end disc of the motor is obliquely arranged, so that the locking column can continuously enter the tooth root under the self-oblique guiding action of the tooth along with the operation of the chain wheel even if the chain wheel loses the driving action of the ratchet and pawl mechanism after the locking column just enters the tooth space.
6. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the number of locking posts on the sprocket is plural.
7. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the specific structure of sprocket does: the wheel axle bearing device comprises a cylinder body, wherein a circle of baffle wall is arranged on the inner wall of the cylinder body, a bearing is arranged in a cylinder cavity on the outer side of the baffle wall, the bearing is arranged on a wheel axle through the bearing, and the bearing and the wheel axle are in clearance fit and can axially slide along the wheel axle; the inner side cylinder cavity of the blocking wall is used for mounting the return spring; a circle of chain teeth are arranged on the outer wall of the cylinder body and used for mounting a chain; the outer end of the barrel is provided with a ratchet, and the outer wall of the inner end of the barrel is provided with the locking column.
8. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: and the inner surface of the outer end disc is provided with a mounting groove for mounting the pawl, and the pawl is mounted in the mounting groove through a torsion spring.
9. The clutch-type electric bicycle sprocket drive mechanism according to claim 1, wherein: the outer end disc is provided with a protective cover which covers the ratchet pawl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393472.3A CN111409760A (en) | 2020-05-11 | 2020-05-11 | Clutch type electric bicycle chain wheel driving mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010393472.3A CN111409760A (en) | 2020-05-11 | 2020-05-11 | Clutch type electric bicycle chain wheel driving mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN111409760A true CN111409760A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010393472.3A Pending CN111409760A (en) | 2020-05-11 | 2020-05-11 | Clutch type electric bicycle chain wheel driving mechanism |
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| CN (1) | CN111409760A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111776128A (en) * | 2020-07-29 | 2020-10-16 | 天津美派电动科技有限公司 | Clutch type chain wheel driving device |
| CN112918612A (en) * | 2020-11-10 | 2021-06-08 | 天津爱玛车业科技有限公司 | Electric bicycle transmission device and electric bicycle |
| CN113147995A (en) * | 2021-05-07 | 2021-07-23 | 浙江阿波罗摩托车制造有限公司 | Electric bicycle |
| CN113530993A (en) * | 2021-08-11 | 2021-10-22 | 河北扶波机械制造有限公司 | Small-sized pulling type vehicle clutch and small-sized pulling type road surface thermal regeneration vehicle |
| CN114871792A (en) * | 2022-04-20 | 2022-08-09 | 安徽荣盛精密科技有限责任公司 | Numerical control machine tool for part production |
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| DE102018132429A1 (en) * | 2018-01-12 | 2019-07-18 | Shimano Inc. | bicycle hub |
| CN111469970A (en) * | 2020-05-11 | 2020-07-31 | 天津美派电动科技有限公司 | Electric bicycle chain wheel clutch driving method |
| CN212022892U (en) * | 2020-05-11 | 2020-11-27 | 天津美派电动科技有限公司 | Novel chain wheel for electric bicycle |
| CN212022890U (en) * | 2020-05-11 | 2020-11-27 | 天津美派电动科技有限公司 | Clutch type electric bicycle chain wheel driving mechanism |
| CN212951007U (en) * | 2020-05-11 | 2021-04-13 | 天津美派电动科技有限公司 | Cam-driven clutch type electric bicycle chain wheel driving mechanism |
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2020
- 2020-05-11 CN CN202010393472.3A patent/CN111409760A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20150352898A1 (en) * | 2014-06-05 | 2015-12-10 | Teddy Formosa Co., Ltd. | Bicycle freecoaster hub |
| DE102018132429A1 (en) * | 2018-01-12 | 2019-07-18 | Shimano Inc. | bicycle hub |
| CN111469970A (en) * | 2020-05-11 | 2020-07-31 | 天津美派电动科技有限公司 | Electric bicycle chain wheel clutch driving method |
| CN212022892U (en) * | 2020-05-11 | 2020-11-27 | 天津美派电动科技有限公司 | Novel chain wheel for electric bicycle |
| CN212022890U (en) * | 2020-05-11 | 2020-11-27 | 天津美派电动科技有限公司 | Clutch type electric bicycle chain wheel driving mechanism |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111776128A (en) * | 2020-07-29 | 2020-10-16 | 天津美派电动科技有限公司 | Clutch type chain wheel driving device |
| CN111776128B (en) * | 2020-07-29 | 2024-04-30 | 天津美派电动科技有限公司 | Clutch type chain wheel driving device |
| CN112918612A (en) * | 2020-11-10 | 2021-06-08 | 天津爱玛车业科技有限公司 | Electric bicycle transmission device and electric bicycle |
| CN113147995A (en) * | 2021-05-07 | 2021-07-23 | 浙江阿波罗摩托车制造有限公司 | Electric bicycle |
| CN113530993A (en) * | 2021-08-11 | 2021-10-22 | 河北扶波机械制造有限公司 | Small-sized pulling type vehicle clutch and small-sized pulling type road surface thermal regeneration vehicle |
| CN113530993B (en) * | 2021-08-11 | 2022-09-16 | 河北扶波机械制造有限公司 | Small-sized pulling type vehicle clutch and small-sized pulling type road surface thermal regeneration vehicle |
| CN114871792A (en) * | 2022-04-20 | 2022-08-09 | 安徽荣盛精密科技有限责任公司 | Numerical control machine tool for part production |
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