CN117780815A - Sprocket clutch driving method of electric bicycle - Google Patents
Sprocket clutch driving method of electric bicycle Download PDFInfo
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- CN117780815A CN117780815A CN202311072554.8A CN202311072554A CN117780815A CN 117780815 A CN117780815 A CN 117780815A CN 202311072554 A CN202311072554 A CN 202311072554A CN 117780815 A CN117780815 A CN 117780815A
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- pawl
- clutch driving
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- elastic piece
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005452 bending Methods 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000002441 reversible effect Effects 0.000 description 3
- 210000001611 motor endplate Anatomy 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The invention discloses a sprocket clutch driving method of an electric bicycle, which comprises a wheel shaft, a motor end disc and a clutch driving mechanism, wherein the motor end disc and the clutch driving mechanism are arranged on the wheel shaft; the clutch driving mechanism comprises an inner fixed sleeve, an outer driving sleeve, a chain wheel, a clutch driving ring pressing ring and a locking piece, wherein the inner fixed sleeve is fixedly arranged on a 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 which is matched with a ratchet of an inner gear ring on the motor end disc, and the clutch driving ring is provided with a first limiting piece, a pawl blocking piece, a first elastic piece, a second elastic piece, a first positioning bulge and a second resetting bulge. The invention realizes that the pawl on the outer driving sleeve can be in transmission engagement with the inner gear ring on the motor end disc only in the forward riding state so as to drive the motor wheel to run. When the motor moves, the flywheel is silent; the falling off of the inverted tooth of the common flywheel is stopped.
Description
Technical Field
The invention belongs to the technical field of electric bicycles, and particularly relates to a sprocket clutch driving method of an electric bicycle.
Background
Referring to fig. 1 and 2, in the conventional rear wheel driving structure of an electric bicycle, a motor wheel is generally mounted on a rear wheel shaft a, a threaded opening 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 fixedly mounted on the threaded opening through threads, a circle of teeth are 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 pawl structure is adopted in the flywheel to ensure unidirectional transmission of riding, so that 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 application number 202122578269.6 discloses a sprocket drive mechanism comprising a motor end plate, a sprocket, an inner fixed sleeve, an outer drive sleeve and a spring member; 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 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, and the pawl is meshed with the inner gear ring on the motor end disc. The sprocket driving mechanism also solves the problem that the flywheel always runs along with the motor wheel, but when the sprocket driving mechanism works, the spring piece can be continuously contacted with the convex teeth on the inner fixing sleeve, and when the bicycle is ridden, the spring piece can continuously generate the noise of the rattling.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a sprocket clutch driving method of an electric bicycle.
The invention is realized by the following technical scheme:
a sprocket clutch driving method of an electric bicycle comprises a wheel shaft, a motor end disc arranged on the wheel shaft and a clutch driving mechanism;
the motor end disc is rotatably 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 clutch driving mechanism comprises an inner fixed sleeve, an outer rotary sleeve, a chain wheel, a pawl ring, a clutch driving gear and an elastic piece; the inner fixed sleeve is fixedly arranged on the wheel shaft, the outer rotary sleeve is rotationally sleeved on the inner fixed sleeve, and the chain wheel and the pawl ring are fixedly sleeved on the outer rotary sleeve; a pawl is arranged on the pawl ring, and a spring ring is sleeved on the pawl ring and the pawl; the clutch driving gear is fixedly arranged on the wheel shaft, and the elastic piece is arranged on the pawl ring;
the elastic piece comprises a main body part, the main body part is of a semi-cylindrical structure with a circular arc-shaped section, a concave circular arc groove is formed in the pawl ring, the axial direction of the circular arc groove is parallel to the axial direction of the pawl and the axial direction of the wheel shaft, and the main body part is arranged in the circular arc groove; the end part of the main body part is connected with a supporting leg elastic piece, and the supporting leg elastic piece is provided with a bending part which is used for contacting with teeth on the clutch driving gear; a poking spring piece is arranged on the side part of the main body part and is positioned at the bottom of the pawl;
when a user rides forward, when the chain drives the chain wheel to run forward, the chain wheel and the pawl ring synchronously run, at the moment, the supporting leg elastic piece of the elastic piece and the clutch driving gear generate relative motion, teeth on the clutch driving gear upwards prop up the supporting leg elastic piece, the supporting leg elastic piece drives the main body part to rotate in the circular arc groove, the main body part drives the stirring elastic piece to upwards move, the pawl is jacked up, the pawl is contacted with the ratchet teeth of the inner gear ring on the motor end disc, the power of the chain is transmitted to the motor end disc through the chain wheel, the chain wheel and the ratchet teeth of the pawl ring and the inner gear ring, and the user rides the electric bicycle;
in the non-riding state, the spring ring can press down the pawl to enable the pawl to be in a normally closed state on the outer rotating sleeve, and in the state, the pawl is separated from the ratchet teeth of the inner gear ring and is not in contact with the ratchet teeth 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, so that relative rotation between the inner fixing sleeve and the wheel shaft can not occur.
In the technical scheme, the inner wall of the clutch driving gear is provided with two planes which are symmetrically arranged, and the wheel shaft is correspondingly milled with the planes, so that relative rotation between the clutch driving gear and the wheel shaft can not occur.
In the technical scheme, the first groove is formed in the middle of the pawl, the second groove is formed in the outer wall of the outer rotary sleeve, the first groove and the second groove are located on the same circumference, and the spring ring is sleeved on the first groove and the second groove.
In the technical scheme, teeth are uniformly distributed on the circumference of the clutch driving gear, and tooth tops are arc-shaped so as to reduce friction with the elastic piece.
In the above technical scheme, the number of the pawls is two, the pawls are symmetrically arranged on the pawl ring, the corresponding number of the elastic pieces is also two, and the pawls are symmetrically arranged on the pawl ring, namely, each pawl corresponds to one elastic piece.
In the above technical scheme, an opening is formed in the main body of the elastic piece, the opening, the first groove and the second groove are located on the same circumference, the spring is sleeved on the opening of the main body, the main body is mounted and limited, and the elastic piece is prevented from being separated from the pawl ring.
In the technical scheme, the other end of the main body part of the elastic piece, which is opposite to the supporting leg elastic piece, is also provided with a limiting piece, and correspondingly, a limiting groove is formed in the chain wheel, the limiting piece is inserted into the limiting groove, the limiting groove is rectangular, and the limiting piece is limited in the moving range through the limiting groove.
The invention also aims to provide an electric bicycle which comprises the chain wheel driving device.
The invention has the advantages and beneficial effects that:
the chain wheel driving device has a simple structure and reasonable design, and realizes that the pawls of the pawl ring 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. When the motor moves, the flywheel is silent; the falling off of the inverted tooth of the common flywheel is stopped; when the electric locomotive is reversed, the pedal crank is static, so that the foot is prevented from being hit; when the motor works normally, the pedal crank does not rotate with the foot, so that the foot is prevented from being hit.
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 apparatus of the present invention.
Fig. 4 is a schematic perspective view of the clutch driving mechanism in the sprocket driving apparatus of the present invention.
Fig. 5 is a schematic front view of the clutch driving mechanism in the sprocket driving apparatus of the present invention.
Fig. 6 is an enlarged partial schematic view of the clutch driving mechanism in the sprocket driving apparatus 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 to 6, a sprocket clutch driving method of an electric bicycle includes an axle 0, and a motor end plate 1 and a clutch driving mechanism mounted on the axle 0.
The motor end disc 1 is rotatably arranged on the wheel shaft 0, an inner gear ring 1-1 is arranged at the outer side end of the motor end disc, and a ring of ratchet teeth 1-2 are arranged on the inner wall of the inner gear ring.
The clutch driving mechanism comprises an inner fixing sleeve 2, an outer rotating sleeve 3, a chain wheel 4, a pawl ring 5, a clutch driving gear 6 and an elastic piece 7. The specific structure of the clutch driving mechanism will be described in detail with reference to the accompanying drawings.
The inner fixing sleeve 2 is fixedly arranged on the wheel axle 0, the inner wall of the inner fixing sleeve 2 is provided with two planes which are symmetrically arranged, and the wheel axle 0 is correspondingly milled with the planes, so that relative rotation between the inner fixing sleeve 2 and the wheel axle can not occur.
The outer rotary sleeve 3 is rotationally sleeved on the inner fixed sleeve 2 through a bearing 8, the chain wheel 4 and the pawl ring 5 are fixedly sleeved on the outer rotary sleeve 3, the chain wheel 4 is positioned at the outer side of the pawl ring 5, and when the chain drives the chain wheel 4, the chain wheel 4 and the pawl ring 5 synchronously operate; a pawl 5-1 is arranged on the pawl ring 5, and the pawl 5-1 can be contacted with a ratchet 1-2 of an inner gear ring 1-1 on the motor end disc 1 in a bouncing state to form a pawl ratchet matching structure; the pawl 5-1 is in a normally closed state on the outer rotating sleeve 3, namely, a first groove 5-11 is arranged in the middle of the pawl 5-1, a circle of second groove 5-2 is arranged on the outer wall of the outer rotating sleeve 3, the first groove 5-11 and the second groove 5-2 are positioned on the same circumference, a spring ring (not shown in the figure) is sleeved on the first groove 5-11 and the second groove 5-2, and in a natural state, the spring ring can press down the pawl 5-1 to enable the pawl 5-1 to be in a normally closed state on the outer rotating sleeve 3, and in this state, the pawl 5-1 is separated from the ratchet 1-2 of the inner gear ring 1-1.
The clutch driving gear 6 is fixedly arranged on the wheel axle 0 and positioned at the inner side of the pawl ring 5 (the inner side of the pawl ring 5 refers to the side of the pawl ring 5 facing the motor end disc 1), the inner wall of the clutch driving gear 6 is provided with two planes which are symmetrically arranged, and the wheel axle 0 is correspondingly milled with the planes, so that the clutch driving gear 6 and the wheel axle 0 cannot rotate relatively; teeth are uniformly distributed on the circumference of the clutch driving gear 6, and tooth tops are arc-shaped so as to reduce friction with the elastic piece 7.
The elastic piece 7 is arranged on the pawl ring 5, and when the chain wheel 4 and the pawl ring 5 synchronously run, the elastic piece 7 can jack up the pawl 5-1 under the drive of the teeth of the clutch driving gear 6, so that the pawl 5-1 is contacted with the ratchet teeth 1-2 of the inner gear ring 1-1 on the motor end disc 1.
Further, the number of the pawls 5-1 is two, and the pawls are symmetrically arranged on the pawl ring 5, and the number of the elastic members 7 is two correspondingly, and the pawls are symmetrically arranged on the pawl ring 5, namely, each pawl 5 corresponds to one elastic member 7.
The specific structure of the elastic piece 7, see fig. 6, comprises a main body part 7-1, wherein the main body part 7-1 is of a semi-cylindrical structure with a circular arc-shaped section, a concave circular arc groove 5-3 is arranged on the pawl ring 5, the axial direction of the circular arc groove 5-3 is parallel to the axial direction of the pawl 5-1 and the axial direction of the wheel axle 0, and the main body part 7-1 is arranged in the circular arc groove 5-3; the end part of the main body part 7-1 is connected with a supporting leg elastic sheet 7-2, and the supporting leg elastic sheet 7-2 is provided with a bending part for contacting with teeth on the clutch driving gear 6; the side part of the main body part 7-1 is provided with a poking elastic piece 7-3, the poking elastic piece 7-3 is positioned at the bottom of the pawl 5-1, when the chain wheel 4 and the pawl ring 5 synchronously run, the supporting leg elastic piece 7-2 of the elastic piece 7 and the clutch driving gear 6 generate relative motion, teeth on the clutch driving gear 6 can upwards prop against the supporting leg elastic piece 7-2, the supporting leg elastic piece 7-2 drives the main body part 7-1 to rotate in the arc groove 5-3, the main body part 7-1 drives the poking elastic piece 7-3 to upwards move, the pawl 5-1 is jacked up, the pawl 5-1 is contacted with the ratchet teeth 1-2 of the inner gear ring 1-1 on the motor end disc 1, and therefore the power of a chain is transmitted to the motor end disc 1 through the chain wheel 4 and the ratchet teeth 1-2 of the pawl ring 5 and the inner gear ring 1-1 when a user rides forwards, and then the power is transmitted to the motor end disc 1, namely the driven wheels run.
Further, an opening 7-5 is provided on the main body 7-1, the opening 7-5 is located on the same circumference with the first groove 5-11 and the second groove 5-2, and then the spring is sleeved on the opening 7-5 of the main body 7-1, so as to limit the installation of the main body 7-1 and prevent the elastic piece 7 from separating from the pawl ring 5. Furthermore, a limiting piece 7-4 is further disposed at the other end of the main body 7-1 opposite to the leg elastic piece 7-2, correspondingly, a limiting groove 4-1 is formed in the sprocket 4, the limiting piece 7-4 is inserted into the limiting groove 4-1, the limiting groove 4-1 is rectangular, and the limiting piece 7-4 is limited in the moving range through the limiting groove 4-1, so that the leg elastic piece 7-2 does not rotate excessively when driving the main body 7-1 to rotate, and if the leg elastic piece rotates excessively, the poking elastic piece 7-3 may be separated from the bottom of the pawl 5-1, thereby losing the function.
The operation method of the chain wheel driving device is as follows:
when a user rides forward, when the chain drives the chain wheel 4 to operate forward, the chain wheel 4 and the pawl ring 5 synchronously operate, at the moment, the supporting leg spring piece 7-2 of the elastic piece 7 and the clutch driving gear 6 generate relative motion, teeth on the clutch driving gear 6 can upwards prop against the supporting leg spring piece 7-2, the supporting leg spring piece 7-2 drives the main body part 7-1 to rotate in the arc groove 5-3, the main body part 7-1 drives the stirring spring piece 7-3 to upwards move, the pawl 5-1 is jacked up, the pawl 5-1 is contacted with the ratchet teeth 1-2 of the inner gear ring 1-1 on the motor end disc 1, and therefore the power of the chain is transmitted to the motor end disc 1 through the chain wheel 4, the pawl 5-1 of the chain wheel 4 and the ratchet teeth 1-2 of the inner gear ring 1-1, and the function of riding the electric bicycle by the user can be achieved.
In the non-riding state, the chain wheel 4 and the pawl ring 5 are in a non-rotating state, the spring ring can press down the pawl 5-1, so that the pawl 5-1 is in a normally closed state on the outer rotating sleeve 3, in the state, the pawl 5-1 is separated from the ratchet teeth 1-2 of the inner gear ring 1-1 and is not contacted with the ratchet teeth of the inner gear ring on the motor end disc, at the moment, the motor can normally drive the rear wheel to move, and the pawl and the ratchet teeth are in non-contact and have no noise.
When the sprocket 4 and the pawl ring 5 are rotated in the reverse direction (the user drives the chain in the reverse direction), the elastic member 7 will lift up the pawl 5-1, but due to the structure of the pawl 5-1 and the ratchet teeth 1-2, the pawl 5-1 does not make driving engagement with the ratchet teeth 1-2, but the ratchet teeth 1-2 push down the pawl 5-1 to make a clicking sound. Normally, the user does not drive the chain in reverse, but rather acts infrequently, and thus does not always produce noise.
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 (8)
1. A sprocket clutch driving method of an electric bicycle is characterized in that: comprises a wheel axle, a motor end disc arranged on the wheel axle and a clutch driving mechanism;
the motor end disc is rotatably 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 clutch driving mechanism comprises an inner fixed sleeve, an outer rotary sleeve, a chain wheel, a pawl ring, a clutch driving gear and an elastic piece; the inner fixed sleeve is fixedly arranged on the wheel shaft, the outer rotary sleeve is rotationally sleeved on the inner fixed sleeve, and the chain wheel and the pawl ring are fixedly sleeved on the outer rotary sleeve; a pawl is arranged on the pawl ring, and a spring ring is sleeved on the pawl ring and the pawl; the clutch driving gear is fixedly arranged on the wheel shaft, and the elastic piece is arranged on the pawl ring;
the elastic piece comprises a main body part, the main body part is of a semi-cylindrical structure with a circular arc-shaped section, a concave circular arc groove is formed in the pawl ring, the axial direction of the circular arc groove is parallel to the axial direction of the pawl and the axial direction of the wheel shaft, and the main body part is arranged in the circular arc groove; the end part of the main body part is connected with a supporting leg elastic piece, and the supporting leg elastic piece is provided with a bending part which is used for contacting with teeth on the clutch driving gear; a poking spring piece is arranged on the side part of the main body part and is positioned at the bottom of the pawl;
when a user rides forward, when the chain drives the chain wheel to run forward, the chain wheel and the pawl ring synchronously run, at the moment, the supporting leg elastic piece of the elastic piece and the clutch driving gear generate relative motion, teeth on the clutch driving gear upwards prop up the supporting leg elastic piece, the supporting leg elastic piece drives the main body part to rotate in the circular arc groove, the main body part drives the stirring elastic piece to upwards move, the pawl is jacked up, the pawl is contacted with the ratchet teeth of the inner gear ring on the motor end disc, the power of the chain is transmitted to the motor end disc through the chain wheel, the chain wheel and the ratchet teeth of the pawl ring and the inner gear ring, and the user rides the electric bicycle;
in the non-riding state, the spring ring can press down the pawl to enable the pawl to be in a normally closed state on the outer rotating sleeve, and in the state, the pawl is separated from the ratchet teeth of the inner gear ring and is not in contact with the ratchet teeth of the inner gear ring on the motor end disc.
2. The sprocket clutch driving method of an electric bicycle according to 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 clutch driving method of an electric bicycle according to claim 1, wherein: the inner wall of the clutch driving gear is provided with two planes which are symmetrically arranged, and the wheel shaft is correspondingly milled with the planes.
4. The sprocket clutch driving method of an electric bicycle according to claim 1, wherein: the middle part of the pawl is provided with a first groove, the outer wall of the outer rotating sleeve is provided with a circle of second groove, the first groove and the second groove are positioned on the same circumference, the first groove and the second groove are sleeved with spring rings, and in a natural state, the spring rings can press down the pawl to enable the pawl to be in a normally closed state on the outer rotating sleeve.
5. The sprocket clutch driving method of an electric bicycle according to claim 1, wherein: teeth are uniformly distributed on the circumference of the clutch driving gear, and tooth tops are arc-shaped.
6. The sprocket clutch driving method of an electric bicycle according to claim 1, wherein: the number of the pawls is two, and the pawls are symmetrically arranged on the pawl ring, and the corresponding number of the elastic pieces is also two, and the elastic pieces are symmetrically arranged on the pawl ring.
7. The sprocket clutch driving method of an electric bicycle according to claim 4, wherein: an opening is arranged on the main body part of the elastic piece, the opening and the first groove and the second groove are positioned on the same circumference, and the spring is sleeved on the opening of the main body part.
8. The sprocket clutch driving method of an electric bicycle according to claim 1, wherein: the other end of the main body part of the elastic piece, which is opposite to the supporting leg elastic piece, is also provided with a limiting piece, and correspondingly, a limiting groove is formed in the chain wheel, the limiting piece is inserted into the limiting groove, the limiting groove is rectangular, and the limiting piece is limited in the moving range through the limiting groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311072554.8A CN117780815A (en) | 2023-08-23 | 2023-08-23 | Sprocket clutch driving method of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311072554.8A CN117780815A (en) | 2023-08-23 | 2023-08-23 | Sprocket clutch driving method of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117780815A true CN117780815A (en) | 2024-03-29 |
Family
ID=90378874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311072554.8A Pending CN117780815A (en) | 2023-08-23 | 2023-08-23 | Sprocket clutch driving method of electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117780815A (en) |
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2023
- 2023-08-23 CN CN202311072554.8A patent/CN117780815A/en active Pending
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