CN111359150A - Indoor bicycle competition device and competition method thereof - Google Patents
Indoor bicycle competition device and competition method thereof Download PDFInfo
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- CN111359150A CN111359150A CN202010264087.9A CN202010264087A CN111359150A CN 111359150 A CN111359150 A CN 111359150A CN 202010264087 A CN202010264087 A CN 202010264087A CN 111359150 A CN111359150 A CN 111359150A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000012549 training Methods 0.000 description 15
- 238000005452 bending Methods 0.000 description 3
- 230000002860 competitive effect Effects 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002650 habitual effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000004202 respiratory function Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
- A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B71/00—Games or sports accessories not covered in groups A63B1/00 - A63B69/00
- A63B71/04—Games or sports accessories not covered in groups A63B1/00 - A63B69/00 for small-room or indoor sporting games
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
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Abstract
The invention discloses an indoor bicycle competition device and a competition method thereof, wherein the indoor bicycle competition device comprises: a base, two bicycles and a differential; two bicycles are arranged on the base in a back direction, and the two bicycles are respectively non-wheel bicycles; the driving shafts of the two bicycles are connected with the rear wheel shaft through a transmission chain, an output pinion is arranged on the rear wheel shaft of each bicycle, the two output pinions are respectively connected with two input ends of a differential mechanism, and an output end of the differential mechanism is meshed with an output bevel gear, so that the speed difference of the two bicycles is transmitted to an output shaft; the front wheel positions of the two bicycles are respectively provided with a sliding block, a pulley is arranged in the sliding block, the base is provided with a bottom plate, and the pulley moves on the bottom plate. The invention designs an indoor bicycle competition device based on the differential principle of an epicyclic gear train, realizes the force competition and the speed competition of double persons when riding a bicycle indoors like a tug-of-war game, and simultaneously solves the environmental problem and the time problem.
Description
Technical Field
The invention relates to the technical field of indoor bicycles, in particular to an indoor bicycle competition device and a competition method thereof.
Background
The closed training environment and the field limitation in military schools make officers and soldiers relatively dull in training content, the utilization degree of the bicycle in daily training is not high, riding equipment placed in some office places is dull and cannot ask people for much attention, the bicycle has an important function in riding, leg muscles can be strengthened through habitual riding movement, microvascular tissues can be strengthened, the vital capacity can be improved, and the respiratory function of the lung can be improved. The traditional bicycle sports is carried out outdoors and needs to occupy a larger field, so how to improve the pleasure of indoor bicycle training, enhance the training enthusiasm of officers and soldiers, and can be used for training without time limitation and occasions, thereby becoming the key for improving the bicycle training of military schools.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide an indoor bicycle competition device and a competition method thereof.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme.
An indoor bicycle exerciser, comprising: a base, two bicycles and a differential; two bicycles are arranged on the base in the back direction, and the two bicycles are non-wheel bicycles respectively; the driving shafts of the two bicycles are connected with the rear wheel shaft through a transmission chain, an output pinion is arranged on the rear wheel shaft of each bicycle, the two output pinions are respectively connected with two input ends of a differential mechanism, and the output end of the differential mechanism is meshed with an output bevel gear, so that the speed difference of the two bicycles is transmitted to an output shaft; the front wheel positions of the two bicycles are respectively provided with a sliding block, a pulley is arranged in the sliding block, the base is provided with a bottom plate, and the pulley moves on the bottom plate.
The technical scheme of the invention has the characteristics and further improvements that:
further, the differential comprises a pair of inner bevel gears, two pairs of outer bevel gears and a planet carrier, wherein two output pinions are respectively meshed with outer wheels of the pair of outer bevel gears, and inner wheels of the outer bevel gears are respectively meshed with the pair of inner bevel gears; the rotating shafts of the pair of inner bevel gears are fixed on the planet carrier through bearings, one side of the planet carrier is arranged on the rotating shafts of the two pairs of outer bevel gears through bearing rotating frames, and the other side of the planet carrier is fixed with a differential output gear.
Furthermore, the differential output gear is meshed with an upper bevel gear of a horizontally arranged coaxial bevel gear pair, a lower bevel gear of the coaxial bevel gear is meshed with an output bevel gear, and the output bevel gear is sleeved on the output shaft.
Furthermore, an output spur gear is sleeved on the output shaft, a transmission rack is arranged on the bottom plate, and the output spur gear is meshed with the transmission rack.
Furthermore, the output shaft is sleeved with a rotating wheel.
Furthermore, the base is a cuboid with an opening at the upper end, and a plurality of reinforcing ribs are fixed on the outer side of the base along the length direction; the differential mechanism is arranged in the middle of the base, and the two bicycles are symmetrically arranged on two sides of the differential mechanism.
Further, still include the casing, the casing encloses and locates outside the differential mechanism.
(II) an indoor bicycle competition method, comprising the following steps:
step 1, two riders respectively trample pedals of two bicycles to enable transmission chains of the two bicycles to rotate in opposite directions and respectively input the transmission chains into two input ends of a differential mechanism;
and 3, the output end of the differential is meshed with the output bevel gear, so that the speed difference of the two bicycles is transmitted to the output shaft, and the racing result of the two riders is judged according to the trend of the spur gear or the rotating wheel sleeved on the output shaft.
Further, the differential principle of the epicyclic gear train is as follows: when the inner wheel rotating speeds of the two pairs of outer bevel gears are the same, the inner bevel gears do not rotate, and the planet carrier only revolves; when the rotating speeds of the inner wheels of the two pairs of outer bevel gears are different, namely, a speed difference exists, the inner bevel gears start to rotate, and the planet carrier revolves and rotates at the same time, so that the differential output gear is driven to rotate.
Compared with the prior art, the invention has the beneficial effects that:
(1) the differential mechanism utilizes the principle of the differential mechanism reversely, and the original two output ends of the differential mechanism are changed into the input ends, and one input end of the differential mechanism is changed into the output end. When the rotating speeds of the gears connected with the two input ends are different, the differential speed is output to the output end through the differential speed principle of the epicyclic gear train, the gears connected with the output end can move to a faster direction according to the differential speed, and when the rotating speeds of the gears connected with the two input ends are the same, the gears connected with the output end are not moved.
(2) The outdoor bicycle is moved from the outdoor to the indoor in a racing way, so that the dependence on time and space is reduced, and the interest and the competitive performance of exercise are enhanced. Under the guidance of the thinking of the bicycle for in-situ competitive sports, the bicycle can move left and right through the use of gear transmission, and the competitive result is visually shown.
(3) The invention reduces the cost of the training equipment. The double pull-force bicycle has a simple design structure, can meet the requirement of riding by two persons at the same time, but greatly reduces the parts required by the whole bicycle, and reduces the cost greatly compared with the cost required by a single bicycle trainer; and can be used for single riding training.
(4) The double riding tug-of-war sports training mode is adopted, training enthusiasm can be greatly aroused, daily training contents of people are enriched, and bicycle training is changed into the training contents loved by people.
Drawings
The invention is described in further detail below with reference to the figures and specific embodiments.
FIG. 1 is a three-dimensional structure diagram of an indoor bicycle competition device according to an embodiment of the present invention;
FIG. 2 is a perspective view of a differential in accordance with an embodiment of the present invention;
FIG. 3 is a schematic illustration of the attachment of the differential according to an embodiment of the present invention;
FIG. 4 is a three-dimensional perspective view of an indoor bicycle competition device according to another embodiment of the present invention;
FIG. 5 is a perspective effect view of the differential of FIG. 4;
in the above figures, 1 base; 101 reinforcing ribs; 2, a bicycle; 201 a drive chain; 202 output pinion; 3, a differential mechanism; 301 inner bevel gear; 302 an outer bevel gear; 303 a planet carrier; 304 differential output gear; 4 a coaxial bevel gear; 5, outputting a bevel gear; 6 an output shaft; 7, a sliding block; 8, a pulley; 9 an output spur gear; 10 a drive rack; 11 a housing; 12 turn the wheel.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention.
Referring to fig. 1 and 4, the present invention provides an indoor bicycle 2 competition device, comprising: a base 1, two bicycles 2 and a differential 3; two bicycles 2 are arranged on the base 1 in a back direction, and the two bicycles 2 are non-wheel bicycles 2 respectively; the driving shafts of the two bicycles 2 are connected with a rear wheel shaft through a transmission chain 201, an output pinion 202 is arranged on the rear wheel shaft of each bicycle 2, the two output pinions 202 are respectively connected with two input ends of a differential mechanism 3, and an output end of the differential mechanism 3 is meshed with an output bevel gear 5 through a coaxial bevel gear 4, so that the speed difference of the two bicycles 2 is transmitted to an output shaft 6; the front wheel positions of the two bicycles 2 are respectively provided with a sliding block 7, a pulley 8 is arranged in the sliding block 7, the base 1 is provided with a bottom plate, and the pulley 8 moves on the bottom plate.
In the above embodiment, the base 1 is used for stabilizing the whole device, and it directly mounted on the ground can, and the base 1 has a bottom plate, and the bottom plate left and right sides sets up two bicycles 2 respectively, adopts 2 frames on two highway bicycles, and the bottom plate mid portion sets up the part that can embody output shaft 6 and turn to, like slide or rack, makes things convenient for whole bicycle 2 to move on the bottom plate. The front wheel position of bicycle 2 is that the bottom four corners is equipped with slider 7 of pulley 8, and slider 7 is fixed with bicycle 2 front axle through the welding, and when the rear wheel antedisplacement, the slider 7 of front wheel department antedisplacement simultaneously. The drive shafts of the two bicycles 2 are connected to the rear wheel shaft via a drive chain 201, an output pinion 202 is provided on the rear wheel shaft of each bicycle 2, and the two output pinions 202 are connected to two input ends of the differential 3, respectively, so that the power of the bicycles 2 is transmitted to the differential 3. The two bicycles 2 are connected through a connecting rod, so that excessive load on the differential mechanism 3 is prevented. Finally, the output end of the differential mechanism 3 changes the torque direction through a pair of coaxial bevel gears 4 and then transmits the torque direction to an output bevel gear 5, finally, the power is transmitted to an output shaft 6, so that the output shaft drives a gear or a rotating wheel 12 to move, a competition result can be obtained from the moving direction of the output shaft, and the riding speed difference between the output shaft and the rotating wheel can be judged according to the rotating speed of the gear. The speed difference of the competitor is obtained by changing the two original output ends of the differential mechanism 3 into the input ends and changing one input end into the output end by reversely utilizing the principle of the differential mechanism 3.
Referring to fig. 2 and 3, according to an embodiment of the present invention, the differential 3 includes a pair of inner bevel gears 301, two pairs of outer bevel gears 302, and a carrier 303, two output pinions 202 are respectively engaged with outer wheels of the pair of outer bevel gears 302, and inner wheels of the outer bevel gears 302 are respectively engaged with the pair of inner bevel gears 301; the rotating shafts of the inner bevel gears 301 are fixed on the planet carrier 303 through bearings, one side of the planet carrier 303 is rotatably erected on the rotating shafts of the two pairs of outer bevel gears 302 through bearings, and the other side of the planet carrier 303 is fixed with a differential output gear 304.
Referring to fig. 2 and 3, according to an embodiment of the present invention, the differential output gear 304 is engaged with an upper bevel gear of a horizontally disposed coaxial bevel gear 4, a lower bevel gear of the coaxial bevel gear 4 is engaged with an output bevel gear 5, and the output bevel gear 5 is sleeved on an output shaft 6.
Referring to fig. 4 and 5, according to an embodiment of the present invention, the output shaft 6 is sleeved with an output spur gear 9, the bottom plate is provided with a transmission rack 10, and the output spur gear 9 is meshed with the transmission rack 10.
Referring to fig. 3, according to an embodiment of the present invention, a rotating wheel 12 is sleeved on the output shaft 6.
In the above embodiment, the differential 3 includes a pair of inner bevel gears 301 disposed in front and rear, two pairs of outer bevel gears 302 disposed in left and right, and a carrier 303, and the pair of outer bevel gears 302 is composed of an outer spur gear and an inner bevel gear which are coaxial and rotate coaxially. The two output pinions 202 are respectively engaged with outer wheels (i.e., outer spur gears) of a pair of outer bevel gears 302, so that the rotational speeds of the two bicycles 2 are transmitted to the outer bevel gears 302; inner wheels (namely inner bevel gears) of the outer bevel gears 302 are respectively meshed with a pair of left and right inner bevel gears 301; the rotating shafts of a pair of left and right inner bevel gears 301 are fixed on the planet carrier 303 through bearings, one side of the planet carrier 303 is rotatably erected on the rotating shafts of two pairs of outer bevel gears 302 through bearings, the other side of the planet carrier 303 is fixed with a differential output gear 304, and when the speeds of two bicycles 2 are the same, the inner bevel gears 301 do not rotate; when the speeds of the two bicycles 2 are different, the inner bevel gear 301 rotates, the planet carrier 303 rotates along the same direction along with the fast side, and the differential output gear 304 welded on one side of the planet carrier 303 is driven to rotate along the same direction; the differential output gear 304 vertically arranged is meshed with the upper bevel gear of the pair of coaxial bevel gears 4 horizontally arranged, so that the output rotating speed is transmitted to the lower bevel gear of the coaxial bevel gear 4 and then meshed with the output bevel gear 5, the output bevel gear 5 is sleeved on the output shaft 6, and finally the speed difference is transmitted to the output shaft 6. The output shaft 6 represents the speed difference by suitable means:
illustratively, the output shaft 6 is sleeved with an output spur gear 9, a transmission rack 10 is welded on the bottom plate, the output spur gear 9 is meshed with the transmission rack 10, the output spur gear 9 moves to the faster direction according to the differential speed, and meanwhile, the sliding block 7 at the front wheel of the bicycle 2 also moves forwards.
Illustratively, the output shaft 6 is sleeved with a rotating wheel 12, the rotating wheel 12 rotates along with the output shaft 6 and moves forwards on the bottom plate, and the slide block 7 at the front wheel of the bicycle 2 also moves forwards at the same time.
Referring to fig. 1 and 4, according to an embodiment of the present invention, the base 1 is a rectangular parallelepiped with an open upper end, and a plurality of ribs 101 are fixed to an outer side of the base 1 along a length direction; the differential mechanism 3 is arranged in the middle of the base 1, and the two bicycles 2 are symmetrically arranged on two sides of the differential mechanism 3.
In the above embodiment, two ends of a rectangular base 1 with an opening at the upper end along the length direction are respectively provided with a bicycle 2, and two sides of a bottom plate of the base 1 are connected with reinforcing ribs 101 through bolt pairs, so that the whole device is stabilized; the differential mechanism 3 is arranged in the middle of the base 1, and racks are welded on the front side edge strips and the rear side edge strips of the middle part of the bottom plate corresponding to the output end of the differential mechanism 3, so that the whole bicycle 2 device can conveniently move on the rack. The base 1 adopts the cuboid, and the area of contact with ground is bigger, has added strengthening rib 101 around the chassis simultaneously, has provided necessary protection to the left and right rocking that produces in the motion process.
Referring to fig. 4, according to an embodiment of the present invention, the differential further includes a housing 11, and the housing 11 is enclosed outside the differential 3.
In the above embodiment, the housing 11 is a protective housing of the differential 3, so that the appearance is attractive and the production is convenient; the pulley 8 is arranged below the shell 11, so that the riding stability is stronger, and the friction influence of the structure per se is reduced to the maximum extent during the force competition.
The invention provides an indoor bicycle competition method, which comprises the following steps:
step 1, two riders respectively trample pedals of two bicycles to enable transmission chains of the two bicycles to drive rear wheel shafts to rotate in opposite directions, and the rear wheel shafts are respectively input into two input ends of a differential mechanism;
and 3, the output end of the differential is meshed with the output bevel gear, so that the speed difference of the two bicycles is transmitted to the output shaft, and the racing result of the two riders is judged according to the trend of the output spur gear or the rotating wheel sleeved on the output shaft.
Specifically, the differential principle of the epicyclic gear train is as follows: when the inner wheel rotating speeds of the two pairs of outer bevel gears are the same, the inner bevel gears do not rotate, and the planet carrier only revolves; when the rotating speeds of the inner wheels of the two pairs of outer bevel gears are different, namely, a speed difference exists, the inner bevel gears start to rotate, and the planet carrier revolves and rotates at the same time, so that the differential output gear is driven to rotate.
The specifications of each mechanical part in the invention are specifically shown in table 1:
TABLE 1 materials and specifications of the parts
Because of the requirement of compact structure and low speed and light load, a closed soft tooth surface design is adopted. When the large gear and the small gear are soft tooth surfaces, considering that the tooth root of the output pinion is thin, the bending strength is low and the loading times are large, when materials are selected and heat treatment is carried out, the tooth surface hardness of the output pinion is generally 20 to 50HBS higher than that of the input large gear (an outer wheel of an outer bevel gear), so that the bending fatigue limit of the output pinion is slightly higher than that of the input large gear of the differential mechanism; the bending strength of the two gear teeth is similar. Therefore, the output pinion gear adopts ZG340-640, and the input gearwheel of the differential mechanism adopts ZG 310-570; the output spur gear is ZG 340-. For safety, the sliding block can adopt an embedded sliding block, and the racks on the floor are arranged into double rows of tooth paths, so that the whole device is more stable.
The invention is based on the situation of two persons riding in situ for competing, and can realize the principle that the left and right driving wheels rotate at different rotating speeds by reversely utilizing a differential mechanism, so that the power generated by the two persons riding is transmitted to the two driving wheels by a chain mechanism, and the differential speed is output to a moving part (a rack and a rotating wheel) by an epicyclic gear train.
The indoor bicycle competition device transfers outdoor bicycle competition to the indoor, and can meet the requirement of people for exercise at any time. Structural design has optimized the required device of riding, and the main instrument of riding adopts medium-sized frame, and the volume is less, can be in the office, and the corridor is put and is provided everybody's training.
Although the present invention has been described in detail in this specification with reference to specific embodiments and illustrative embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made thereto based on the present invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. An indoor bicycle exerciser, comprising: a base, two bicycles and a differential; two bicycles are arranged on the base in the back direction, and the two bicycles are non-wheel bicycles respectively; the driving shafts of the two bicycles are connected with the rear wheel shaft through a transmission chain, an output pinion is arranged on the rear wheel shaft of each bicycle, the two output pinions are respectively connected with two input ends of a differential mechanism, and the output end of the differential mechanism is meshed with an output bevel gear, so that the speed difference of the two bicycles is transmitted to an output shaft; the front wheel positions of the two bicycles are respectively provided with a sliding block, a pulley is arranged in the sliding block, the base is provided with a bottom plate, and the pulley moves on the bottom plate.
2. An indoor bicycle competition device according to claim 1, wherein the differential comprises a pair of inner bevel gears, two pairs of outer bevel gears and a planet carrier, wherein two output pinions are respectively engaged with outer wheels of the pair of outer bevel gears, and inner wheels of the outer bevel gears are respectively engaged with the pair of inner bevel gears; the rotating shafts of the pair of inner bevel gears are fixed on the planet carrier through bearings, one side of the planet carrier is arranged on the rotating shafts of the two pairs of outer bevel gears through bearing rotating frames, and the other side of the planet carrier is fixed with a differential output gear.
3. An indoor bicycle competition device according to claim 2, wherein the differential output gear is engaged with an upper bevel gear of a horizontally arranged coaxial bevel gear pair, a lower bevel gear of the coaxial bevel gear is engaged with an output bevel gear, and the output bevel gear is sleeved on the output shaft.
4. An indoor bicycle competition device according to claim 3, wherein an output spur gear is sleeved on the output shaft, a transmission rack is arranged on the bottom plate, and the output spur gear is meshed with the transmission rack.
5. An indoor bicycle competition device according to claim 3, wherein a rotating wheel is sleeved on the output shaft.
6. An indoor bicycle competition device according to claim 1, wherein the base is a cuboid with an opening at the upper end, and a plurality of reinforcing ribs are fixed on the outer side of the base along the length direction; the differential mechanism is arranged in the middle of the base, and the two bicycles are symmetrically arranged on two sides of the differential mechanism.
7. An indoor bicycle competition according to any one of claims 1 to 6, further comprising a housing, the housing being enclosed outside the differential.
8. An indoor bicycle competition method is characterized by comprising the following steps:
step 1, two riders respectively trample pedals of two bicycles to enable transmission chains of the two bicycles to rotate in opposite directions and respectively input the transmission chains into two input ends of a differential mechanism;
step 2, the differential mechanism outputs the speed difference of the two transmission chains from the output end of the differential mechanism through the differential principle of an epicyclic gear train;
and 3, the output end of the differential is meshed with the output bevel gear, so that the speed difference of the two bicycles is transmitted to the output shaft, and the racing result of the two riders is judged according to the trend of the spur gear or the rotating wheel sleeved on the output shaft.
9. An indoor bicycle competition method according to claim 8, wherein the epicyclic gear train has a differential principle of: when the inner wheel rotating speeds of the two pairs of outer bevel gears are the same, the inner bevel gears do not rotate, and the planet carrier only revolves; when the rotating speeds of the inner wheels of the two pairs of outer bevel gears are different, namely, a speed difference exists, the inner bevel gears start to rotate, and the planet carrier revolves and rotates at the same time, so that the differential output gear is driven to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010264087.9A CN111359150A (en) | 2020-04-07 | 2020-04-07 | Indoor bicycle competition device and competition method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010264087.9A CN111359150A (en) | 2020-04-07 | 2020-04-07 | Indoor bicycle competition device and competition method thereof |
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| CN111359150A true CN111359150A (en) | 2020-07-03 |
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| CN202010264087.9A Pending CN111359150A (en) | 2020-04-07 | 2020-04-07 | Indoor bicycle competition device and competition method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704841A (en) * | 2020-12-31 | 2021-04-27 | 徐荣华 | Interesting bicycle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112704841A (en) * | 2020-12-31 | 2021-04-27 | 徐荣华 | Interesting bicycle |
| CN112704841B (en) * | 2020-12-31 | 2022-04-15 | 泉州众联青创科技有限公司 | Interesting bicycle |
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Application publication date: 20200703 |