CN114104182B - Sprocket driving mechanism and using method thereof - Google Patents
Sprocket driving mechanism and using method thereof Download PDFInfo
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- CN114104182B CN114104182B CN202111243194.4A CN202111243194A CN114104182B CN 114104182 B CN114104182 B CN 114104182B CN 202111243194 A CN202111243194 A CN 202111243194A CN 114104182 B CN114104182 B CN 114104182B
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- sleeve
- driving sleeve
- outer driving
- spring piece
- pawl
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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
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
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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
- B62M1/00—Rider propulsion of wheeled vehicles
- B62M1/10—Rider propulsion of wheeled vehicles involving devices which enable the mechanical storing and releasing of energy occasionally, e.g. arrangement of flywheels
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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
- B62M7/00—Motorcycles characterised by position of motor or engine
- B62M7/12—Motorcycles characterised by position of motor or engine with the engine beside or within the driven wheel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses a chain wheel driving mechanism and a using method thereof, wherein the chain wheel driving mechanism comprises a motor end disc, a chain wheel, an inner fixing sleeve, an outer driving sleeve and a spring piece; an inner gear ring is arranged on the motor end disc, an inner fixed sleeve is fixedly arranged on the wheel shaft, an outer driving sleeve is rotationally sleeved on the inner fixed sleeve through a bearing, and a chain wheel is fixedly sleeved on the outer driving sleeve; the outer driving sleeve is provided with normally closed pawls corresponding to ratchets of the inner gear ring, the inner fixing sleeve is provided with a circle of convex teeth, the spring piece is fixedly arranged on the outer driving sleeve and is formed by bending an elastic steel wire, the end part of the spring piece is inserted between the bottom surface of the pawl and the outer driving sleeve, when the spring piece rotates along with the outer driving sleeve, the bending part of the spring piece contacts with the convex teeth on the inner fixing sleeve, the convex teeth jack up the spring piece outwards, the end part of the spring piece drives the pawl on the outer driving sleeve to lift upwards, and the pawl is meshed with the inner gear ring on the motor end disc.
Description
Technical Field
The invention belongs to the technical field of electric bicycles and bicycles, and particularly relates to a chain wheel driving mechanism and a using method thereof.
Background
Referring to fig. 1 and 2, the existing rear wheel driving structure of an electric bicycle is that a motor wheel is mounted on a rear wheel shaft a, a threaded opening b-1 for mounting a flywheel (i.e. a chain wheel) is arranged on a motor end disc b of the motor wheel, a flywheel c is fixedly mounted with the motor wheel by being mounted on the threaded opening through threads, a circle of teeth are arranged 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 the inside of the flywheel adopts a ratchet and pawl structure to ensure unidirectional transmission of riding, and the flywheel transmission structure has the following problems: 1. the flywheel always runs along with the motor wheel, so that the working time of the flywheel is greatly prolonged, and the flywheel is internally provided with a ratchet and pawl structure to ensure the unidirectional transmission of riding, so that the ratchet and pawl structure in the flywheel is easy to damage, and the service life of the flywheel is lower. 2. After the flywheel works for a long time and ages, the condition that the crank rotates with the rotation easily occurs (when the motor wheel runs, the flywheel can possibly drive the flywheel outer ring to rotate due to the increase of the aging friction force in the flywheel, and then the flywheel outer ring drives the chain to rotate, the chain drives the crank to rotate with the rotation), the crank rotates with the rotation to cause the vehicle auxiliary sensor to send an auxiliary signal to the controller, the controller mistakenly uses an auxiliary function for a client, the galloping is caused, and hidden danger is brought to the trip safety of the client. 3. After the flywheel works and ages for a long time, when the motor wheel drives the flywheel to operate, larger noise can occur.
Patent number CN212423372U discloses a clutch-type sprocket drive mechanism, which comprises a wheel axle, a side end disc, a sprocket sleeve, an inner sleeve, an elastic washer and a toggle; the side end disc is rotatably arranged on the wheel shaft, and teeth are arranged on the side end disc; the inner sleeve is fixedly arranged on the wheel shaft, and the elastic washer is fixedly arranged on the inner end surface of the inner sleeve; the poking button is movably sleeved on the wheel shaft and is arranged on the inner side of the elastic washer, and is provided with poking teeth which can be meshed with teeth on the side end disc after the poking button moves towards the side end disc; the chain wheel sleeve is arranged on the inner sleeve through a bearing, and one end of the outer side of the chain wheel sleeve is provided with a chain wheel for being connected with a chain; one end of the inner side of the chain wheel sleeve is provided with a circle of cylinder, the wall of the cylinder is provided with a guide channel matched with the poking teeth of the poking twists, and the poking teeth of the poking twists are positioned in the guide channel. When a rider rides forwards, the chain drives the chain wheel sleeve to rotate forwards, the guide channel of the chain wheel sleeve can drive the poking button to rotate forwards, and the convex elastic sheet on the elastic gasket can drive the poking button to move towards the side end disc when the poking button rotates forwards, so that the poking button is meshed with teeth of the inner gear ring on the side end disc, and the side end disc is driven to rotate; when a rider stops riding, the bicycle body continues to move forwards, at the moment, the lateral end disc rotates forwards along with the wheel, the second tooth surface of the tooth teeth of the inner gear ring of the lateral end disc can promote the poking teeth of the poking button to exit the tooth teeth along the second tooth surface, and therefore the sprocket sleeve cannot be driven to rotate; when a rider steps on the pedals backwards, the chain drives the chain wheel sleeve to reversely rotate, at the moment, the guide channel of the chain wheel sleeve can drive the poking twists to reversely rotate, the convex elastic piece on the elastic washer can drive the poking twists to reversely move towards the side end disc during the poking twists reversely rotating, but because the poking teeth of the poking twists act with the second tooth surface of the teeth of the inner gear ring of the side end disc during the poking twists reversely rotating, the poking twists can not drive the side end disc to reversely move, but the second tooth surface of the teeth of the side end disc can promote the poking twists to withdraw from the teeth along the second tooth surface, and meanwhile the poking twists compress the convex elastic piece on the elastic washer. The clutch type chain wheel driving mechanism solves the problem that the flywheel always runs along with the motor wheel, but the clutch type chain wheel driving mechanism is excessively complex in structure and unstable in operation.
Patent application number 202110655619.6 discloses a switch-type sprocket drive mechanism comprising a motor end plate, a sprocket, an internal fixing sleeve, a drive sleeve and an elastic switch; an inner gear ring is arranged at the outer side end of the motor end disc, an inner fixed sleeve is fixedly arranged on the wheel shaft, a driving sleeve is rotationally sleeved on the inner fixed sleeve, and a chain wheel is fixedly sleeved on the driving sleeve; a pawl is arranged on the driving sleeve and is matched with teeth of an inner gear ring on the motor end disc to form a pawl ratchet matching structure; the elastic switch is arranged on the driving sleeve and used for controlling the rising and pressing states of the pawl on the driving sleeve; a contact part for driving the elastic switch is arranged on the inner fixed sleeve; in a riding state, the top contact part drives the elastic switch to open outwards (namely to open towards the motor end disc), so that a pawl on the driving sleeve loses the limit function of the elastic switch and is lifted to be contacted with teeth of the inner gear ring; in the non-riding state, the elastic switch limits the pawl to a pressing state, so that the pawl is separated from the inner gear ring of the motor end disc. The switch type chain wheel driving mechanism also solves the problem that the flywheel always runs along with the motor wheel, but the structure of the elastic switch in the switch type chain wheel driving mechanism is too complex, the elastic switch needs to transversely cut into or separate from the pawl every time, the work is not stable enough, and the service life is low.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a chain wheel driving mechanism and a using method thereof.
The invention is realized by the following technical scheme:
a chain wheel driving mechanism and a using method thereof comprise a motor end disc, a chain wheel, an inner fixing sleeve, an outer driving sleeve and a spring piece; the motor end disc is arranged on the wheel shaft, an inner gear ring is arranged at the outer side end of the motor end disc, and a circle of ratchet teeth is arranged on the inner wall of the inner gear ring; the inner fixed sleeve is fixedly arranged on the wheel shaft, the outer driving sleeve is rotationally sleeved on the inner fixed sleeve through a bearing, and the chain wheel is fixedly sleeved on the outer driving sleeve; the outer driving sleeve is provided with a pawl corresponding to the ratchet teeth of the inner gear ring, the circumferential outer wall of the position of the pawl on the outer driving sleeve is provided with a circle of mounting groove, the mounting groove is sleeved with an elastic ring, and the elastic ring sleeves the pawl to keep the pawl in a closed state; a space is reserved between the bottom surface of the pawl and the outer driving sleeve in the closed state;
a circle of convex teeth are arranged on the outer wall of the inner fixed sleeve at equal intervals along the circumference of the inner fixed sleeve, the spring piece is fixedly arranged on the outer driving sleeve, the spring piece is formed by bending an elastic steel wire, the end part of the spring piece is inserted into a space between the bottom surface of the pawl and the outer driving sleeve, the spring piece is provided with a bending part matched with the convex teeth on the inner fixed sleeve, and the bending part bends towards the convex teeth;
when a rider rides forward, when the chain drives the chain wheel to run forward, the chain wheel synchronously drives the outer driving sleeve to rotate, and when the outer driving sleeve rotates, the outer driving sleeve synchronously drives the spring piece to rotate, and when the spring piece rotates, the bending part of the spring piece contacts with the convex teeth on the inner fixing sleeve, the convex teeth jack up the spring piece to the radial outer side direction of the inner fixing sleeve, so that the end part of the spring piece drives the pawl on the outer driving sleeve to lift up against the elastic force of the elastic ring, and the pawl is meshed with the ratchet of the inner gear ring on the motor end disc, so that the pawl drives the motor end disc to rotate;
in the non-riding state, the pawl on the outer driving sleeve is in a closed rotating state and is not contacted with the ratchet of the inner gear ring on the motor end disc.
In the technical scheme, the inner wall of the inner fixing sleeve is provided with two planes which are symmetrically arranged, and the wheel shaft is correspondingly milled with the planes.
In the technical scheme, the number of the pawls is two, and the pawls are symmetrically arranged on the outer driving sleeve.
In the technical scheme, the groove is formed in the outer wall of the outer driving sleeve corresponding to the bottom surface of the pawl, so that a certain space is reserved between the bottom surface of the pawl and the outer driving sleeve in the closed state.
In the above technical scheme, two mounting holes for mounting the spring member are symmetrically formed in the outer driving sleeve, the spring member is provided with an outward bending portion corresponding to the mounting holes, and the outward bending portion is embedded into the mounting holes from the inner side to the outer side of the outer driving sleeve, so that the spring member is fixed on the outer driving sleeve.
In the technical scheme, the outer end of the inner fixing sleeve and the outer driving sleeve is provided with the outer end disc, the outer end disc is connected with the inner fixing sleeve through threads, and the outer end disc plays a role in axially limiting the outer driving sleeve.
In the technical scheme, at least one positioning groove is formed in the outer wall of the outer driving sleeve, and a positioning boss corresponding to the positioning groove is arranged on the inner wall of the chain wheel and used for fixedly sleeving the chain wheel on the outer driving sleeve.
In the technical scheme, a protective cover is further arranged on the outer wall of the outer driving sleeve.
In the above technical scheme, when a rider steps on the pedal backwards, the chain drives the chain wheel to rotate reversely, the chain wheel drives the outer driving sleeve to rotate reversely, at the moment, the convex teeth on the inner fixing sleeve can also prop up the bending part of the spring piece, the convex teeth jack up the spring piece towards the radial outer side direction of the inner fixing sleeve, the end part of the spring piece drives the pawl on the outer driving sleeve to lift upwards against the elastic force of the elastic ring, so that the pawl is meshed with the ratchet of the inner gear ring on the motor end disc, but because the outer driving sleeve rotates reversely, the ratchet of the inner gear ring of the motor end disc can push down the pawl on the outer driving sleeve in the reverse rotation process of the outer driving sleeve, and the outer driving sleeve can rotate reversely.
The invention also aims to provide an electric bicycle which comprises the chain wheel driving mechanism.
The invention has the advantages and beneficial effects that:
the chain wheel driving mechanism has a simple structure and reasonable design, and realizes that pawls on the outer driving sleeve can be in transmission engagement with the inner gear ring on the motor end disc only in a forward riding state so as to drive the motor wheel to operate. Compared with the prior art, the technical scheme of the invention greatly reduces the working time of the pawl, prolongs the service life of the mechanism, reduces the running noise of the chain wheel driving mechanism, and effectively avoids the situation of crank follow-up rotation.
The spring part in the chain wheel driving mechanism is formed by bending one elastic steel wire, and has the advantages of simple manufacturing process, low cost and good service life. The end of the spring piece is inserted into the space between the bottom surface of the pawl and the outer driving sleeve, the spring piece is provided with a bending part matched with the convex teeth on the inner fixing sleeve, the bending part bends towards the convex teeth, when the spring piece rotates along with the outer driving sleeve, the bending part of the spring piece contacts with the convex teeth on the inner fixing sleeve, the convex teeth jack up the spring piece towards the radial outer direction of the inner fixing sleeve, the end of the spring piece drives the pawl on the outer driving sleeve to lift upwards against the elastic force of the elastic ring, and the pawl is meshed with the ratchet teeth of the inner gear ring on the motor end disc.
In addition, as the chain wheel is directly arranged on the wheel shaft, compared with the traditional chain wheel which is arranged on the threaded opening of the motor end disc, the inner diameter of the chain wheel is smaller, so that the size of the chain wheel is reduced, the design of a vehicle model is more attractive, and the risk of yarn withdrawal of the chain wheel is avoided.
Drawings
Fig. 1 is a schematic structural view of a rear wheel driving structure of an electric bicycle of the related art (a state in which a flywheel is not mounted).
Fig. 2 is a schematic structural view of a rear wheel driving structure of an electric bicycle in the related art.
Fig. 3 is a cross-sectional view of the sprocket drive mechanism of the present invention.
Fig. 4 is a schematic perspective view showing an assembled inner fixing sleeve, outer driving sleeve and spring member in the sprocket driving mechanism of the present invention.
Fig. 5 is a schematic side view of the assembled inner fixing sleeve, outer drive sleeve and spring member of the sprocket drive mechanism of the present invention.
Other relevant drawings may be made by those of ordinary skill in the art from the above figures without undue burden.
Detailed Description
In order to make the person skilled in the art better understand the solution of the present invention, the following describes the solution of the present invention with reference to specific embodiments.
Referring to fig. 3-5, a sprocket drive mechanism includes a motor end plate 1, a sprocket 2, an inner stationary sleeve 3, an outer drive sleeve 4, and a spring member 5.
The motor end disc 1 is arranged on the wheel shaft 0, an inner gear ring 1-1 is arranged at the outer side end of the motor end disc, a circle of ratchet teeth 1-2 is arranged on the inner wall of the inner gear ring, or the inner gear ring and the motor end disc can be of an integrated structure or a split connection structure.
The inner fixing sleeve 3 is fixedly arranged on the wheel axle 0, the inner wall of the inner fixing sleeve 3 is provided with two planes 3-1 which are symmetrically arranged, and the wheel axle 0 is correspondingly milled with a plane, so that relative rotation between the inner fixing sleeve 3 and the wheel axle can not occur.
The outer driving sleeve 4 is rotatably sleeved on the inner fixing sleeve 3 through a bearing a, and the chain wheel 2 is fixedly sleeved on the outer driving sleeve 4; the outer driving sleeve 4 is provided with two pawls 4-1, the pawls 4-1 are symmetrically arranged on the outer driving sleeve 4, and the pawls 4-1 are matched with the ratchet teeth 1-2 of the inner gear ring 1-1 on the motor end disc 1 to form a pawl ratchet matching structure; the pawl 4-1 is in a normally closed state on the outer driving sleeve 4, namely, a circle of mounting groove 4-2 is formed in the outer wall of the circumference of the position of the pawl 4-1 on the outer driving sleeve 4, an elastic ring is sleeved in the mounting groove, the elastic ring is sleeved on the pawl 4-1 (a groove 4-11 for mounting the elastic ring is formed in the pawl 4-1, and therefore the elastic ring cannot protrude out of the surface of the pawl), and the elastic ring enables the pawl 4-1 to keep in a closed state under the action of no external force. In addition, a groove 4-3 is provided at the outer wall of the outer driving sleeve 4 corresponding to the bottom surface of the pawl 4-1 so that a certain space is formed between the bottom surface of the pawl 4-1 and the outer driving sleeve 4 in the closed state of the pawl 4-1.
A circle of convex teeth 3-2 are arranged on the outer wall of the inner fixing sleeve 3 at equal intervals along the circumference of the inner fixing sleeve, and the number of the convex teeth 3-2 is preferably 7-12.
The spring piece 5 is fixedly arranged on the outer driving sleeve 4, the spring piece 5 is formed by bending an elastic steel wire, the end part of the spring piece 5 is inserted into a space between the bottom surface of the pawl 4-1 and the outer driving sleeve 4, the spring piece 5 is provided with a bending part 5-1 matched with the convex teeth 3-2 on the inner fixing sleeve 3, the bending part bends towards the convex teeth 3-2, when the spring piece 5 rotates along with the outer driving sleeve 4, the bending part 5-1 of the spring piece 5 is contacted with the convex teeth 3-2 on the inner fixing sleeve 3, the convex teeth 3-2 jack the spring piece 5 towards the radial outer side direction of the inner fixing sleeve 3, so that the end part of the spring piece 5 drives the pawl 4-1 on the outer driving sleeve 4 to upwards overcome the elasticity of an elastic ring, and the pawl 4-1 is meshed with the ratchet teeth 1-2 of the inner gear ring 1-1 on the motor end disc 1.
Further, two mounting holes 4-4 for mounting the spring member 5 are symmetrically formed in the outer driving sleeve 4, the spring member 5 is provided with an outward bending portion 5-2 corresponding to the mounting hole 4-4, and the outward bending portion 5-2 of the spring member 5 is embedded into the mounting hole 4-4 from the inner side to the outer side of the outer driving sleeve 4, so that the spring member 5 is fixed on the outer driving sleeve 4.
Further, outer end plates 6 are provided at outer ends of the inner fixing sleeve 3 and the outer driving sleeve 4, the outer end plates 6 are connected with the inner fixing sleeve 3 through threads, and an axial limiting effect of the outer driving sleeve 4 is achieved through the outer end plates 6.
Further, at least one positioning groove 4-3 is arranged on the outer wall of the outer driving sleeve 4, and a positioning boss corresponding to the positioning groove 4-3 is arranged on the inner wall of the chain wheel 2, so that the chain wheel 2 is fixedly sleeved on the outer driving sleeve 4.
Further, a protective cover 7 is also arranged on the outer wall of the outer driving sleeve 4.
The operation method of the chain wheel driving mechanism is as follows:
when a rider rides forward, when the chain drive sprocket 2 runs forward, the sprocket 2 synchronously drives the outer drive sleeve 4 to rotate, the outer drive sleeve 4 synchronously drives the spring piece 5 to rotate when rotating, the bending part 5-1 of the spring piece 5 contacts with the convex teeth 3-2 on the inner fixed sleeve 3 when the spring piece 5 rotates, the convex teeth 3-2 jack up the spring piece 5 to the radial outer side direction of the inner fixed sleeve 3, the end part of the spring piece 5 drives the pawl 4-1 on the outer drive sleeve 4 to lift up against the elasticity of the elastic ring, and the pawl 4-1 is meshed with the ratchet 1-2 of the inner gear ring 1-1 on the motor end disc 1, so that the pawl 4-1 drives the motor end disc 1 to rotate.
In the non-riding state (i.e. the sprocket does not rotate), the pawl 4-1 on the outer driving sleeve 4 is in a closed rotating state and does not contact with the ratchet 1-2 of the inner gear ring 1-1 on the motor end disc 1, at the moment, the motor can normally drive the rear wheel to move, and the pawl 4-1 and the ratchet 1-2 do not contact and have no noise.
When a rider steps on the pedals backwards, the chain drives the chain wheel to reversely rotate, the chain wheel drives the outer driving sleeve 4 to reversely rotate, at the moment, the convex teeth 3-2 on the inner fixing sleeve 3 also prop against the bending parts 5-1 of the spring pieces 5, the convex teeth 3-2 jack up the spring pieces 5 towards the radial outer side direction of the inner fixing sleeve 3, the end parts of the spring pieces 5 drive the pawls 4-1 on the outer driving sleeve 4 to lift upwards against the elastic force of the elastic ring, the pawls 4-1 are meshed with the ratchet teeth 1-2 of the inner gear ring 1-1 on the motor end disc 1, but because the outer driving sleeve 4 reversely rotates, the ratchet teeth 1-2 of the inner gear ring of the motor end disc 1 can downwards press the pawls 4-1 on the outer driving sleeve 4 in the reverse rotation process of the outer driving sleeve 4, and the outer driving sleeve 4 can reversely rotate.
The foregoing has described exemplary embodiments of the invention, it being understood that any simple variations, modifications, or other equivalent arrangements which would not unduly obscure the invention may be made by those skilled in the art without departing from the spirit of the invention.
Claims (9)
1. A sprocket drive mechanism, characterized in that: comprises a motor end disc, a chain wheel, an inner fixed sleeve, an outer driving sleeve and a spring piece; the motor end disc is arranged on the wheel shaft, an inner gear ring is arranged at the outer side end of the motor end disc, and a circle of ratchet teeth is arranged on the inner wall of the inner gear ring; the inner fixed sleeve is fixedly arranged on the wheel shaft, the outer driving sleeve is rotationally sleeved on the inner fixed sleeve through a bearing, and the chain wheel is fixedly sleeved on the outer driving sleeve; the outer driving sleeve is provided with a pawl corresponding to the ratchet teeth of the inner gear ring, the outer wall of the circumference of the position of the pawl on the outer driving sleeve is provided with a circle of mounting groove, the mounting groove is sleeved with an elastic ring, and the elastic ring sleeves the pawl; a space is reserved between the bottom surface of the pawl and the outer driving sleeve in the closed state;
a circle of convex teeth are arranged on the outer wall of the inner fixed sleeve at equal intervals along the circumference of the inner fixed sleeve, the spring piece is fixedly arranged on the outer driving sleeve, the spring piece is formed by bending an elastic steel wire, the end part of the spring piece is inserted into a space between the bottom surface of the pawl and the outer driving sleeve, the spring piece is provided with a bending part matched with the convex teeth on the inner fixed sleeve, and the bending part bends towards the convex teeth;
when a rider rides forward, when the chain drives the chain wheel to run forward, the chain wheel synchronously drives the outer driving sleeve to rotate, and when the outer driving sleeve rotates, the outer driving sleeve synchronously drives the spring piece to rotate, and when the spring piece rotates, the bending part of the spring piece contacts with the convex teeth on the inner fixing sleeve, the convex teeth jack up the spring piece to the radial outer side direction of the inner fixing sleeve, so that the end part of the spring piece drives the pawl on the outer driving sleeve to lift up against the elastic force of the elastic ring, and the pawl is meshed with the ratchet of the inner gear ring on the motor end disc, so that the pawl drives the motor end disc to rotate;
in the non-riding state, the pawl on the outer driving sleeve is in a closed rotating state and is not contacted with the ratchet of the inner gear ring on the motor end disc.
2. The sprocket drive mechanism as set forth in claim 1, wherein: the inner wall of the inner fixing sleeve is provided with two planes which are symmetrically arranged, and the wheel shaft is correspondingly milled with the planes.
3. The sprocket drive mechanism as set forth in claim 1, wherein: the number of the pawls is two, and the pawls are symmetrically arranged on the outer driving sleeve.
4. The sprocket drive mechanism as set forth in claim 1, wherein: the outer wall of the outer driving sleeve corresponding to the bottom surface of the pawl is provided with a groove, so that a certain space is reserved between the bottom surface of the pawl and the outer driving sleeve in a closed state.
5. The sprocket drive mechanism as set forth in claim 1, wherein: two mounting holes for mounting the spring piece are symmetrically formed in the outer driving sleeve, the spring piece is provided with an outward bending part corresponding to the mounting holes, and the outward bending part is embedded into the mounting holes from the inner side to the outer side of the outer driving sleeve, so that the spring piece is fixed on the outer driving sleeve.
6. The sprocket drive mechanism as set forth in claim 1, wherein: the outer end of the inner fixed sleeve and the outer driving sleeve is provided with an outer end disc which is connected with the inner fixed sleeve through threads.
7. The sprocket drive mechanism as set forth in claim 1, wherein: at least one positioning groove is arranged on the outer wall of the outer driving sleeve, and a positioning boss corresponding to the positioning groove is arranged on the inner wall of the chain wheel.
8. The sprocket drive mechanism as set forth in claim 1, wherein: a protective cover is also arranged on the outer wall of the outer driving sleeve.
9. An electric bicycle is characterized in that: the electric bicycle comprising a sprocket drive mechanism as set forth in one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243194.4A CN114104182B (en) | 2021-10-25 | 2021-10-25 | Sprocket driving mechanism and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111243194.4A CN114104182B (en) | 2021-10-25 | 2021-10-25 | Sprocket driving mechanism and using method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114104182A CN114104182A (en) | 2022-03-01 |
| CN114104182B true CN114104182B (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111243194.4A Active CN114104182B (en) | 2021-10-25 | 2021-10-25 | Sprocket driving mechanism and using method thereof |
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| Country | Link |
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| CN (1) | CN114104182B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001187597A (en) * | 1999-10-21 | 2001-07-10 | Sanyo Electric Co Ltd | Power-assisted bicycle |
| CN201670332U (en) * | 2010-05-04 | 2010-12-15 | 陈戈平 | Power assisted transmission mechanism of electric power assisted bicycle |
| CN103754318A (en) * | 2014-01-26 | 2014-04-30 | 浙江来福谐波传动股份有限公司 | Power assembly mechanism for electric moped scooter |
| 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 |
| CN113247169B (en) * | 2021-06-11 | 2022-09-30 | 天津美派电动科技有限公司 | Switch type chain wheel driving mechanism |
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2021
- 2021-10-25 CN CN202111243194.4A patent/CN114104182B/en active Active
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| Publication number | Publication date |
|---|---|
| CN114104182A (en) | 2022-03-01 |
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