Expansion device for water running for quickly refitting bicycle

Abstract

The invention relates to an extension device for water traveling for quickly refitting a bicycle, and belongs to the technical field of bicycle refitting. Comprising an inflator pump, an air bag, an air pipe, an underwater driving device and a connecting device. The inflator pump is detachably connected with a rear frame of the bicycle, and a rear wheel of the bicycle drives the inflator pump to work. The air bag provides buoyancy for the bicycle, so that the bicycle floats on the water surface. The underwater driving device is detachably connected with a front wheel of the bicycle, paddles of the underwater driving device are located below the water surface, the inflator pump injects air flow into the underwater driving device through an air pipe, and the paddles are pushed to rotate through the air flow. The bicycle is fixedly connected with the air bag through the connecting device. The bicycle can be transformed in a splicing mode, so that the bicycle can run in water, and the riding fun is increased.

Description

Technical Field

[0001] The present application belongs to the technical field of bicycle modification, and in particular relates to an expansion device for quickly modifying a bicycle for traveling on water. Background Art

[0002] Bicycles are both a means of transportation and a kind of sports and fitness equipment, and outdoor cycling has become a favorite outdoor fitness method for people. However, existing bicycles cannot travel in water, and pedal-type equipment used for exercising in water cannot travel on land. Summary of the invention

[0003] The technical problem to be solved by the present application is: to overcome the deficiencies of the prior art and to provide an expansion device for quickly modifying a bicycle for traveling on water. The present application can modify the bicycle by assembling it so that it can travel on water, thereby increasing the fun of riding.

[0004] The technical solution adopted by this application to solve the problems existing in the prior art is:

[0005] The invention discloses an expansion device for quickly modifying a bicycle for traveling on water, comprising an air pump, an air bag, an air pipe, an underwater driving device and a connecting device.

[0006] The air pump is detachably connected to the rear frame of the bicycle, and the rear wheel of the bicycle drives the air pump to work.

[0007] The air bag provides buoyancy for the bicycle, so that the bicycle floats on the water.

[0008] The underwater driving device is detachably connected to the front wheel of the bicycle, the paddles of the underwater driving device are located below the water surface, and the air pump injects air into the underwater driving device through an air pipe, and the air pushes the paddles to rotate.

[0009] The connecting device fixedly connects the bicycle to the airbag.

[0010] Preferably, the connecting device includes a rear wheel connecting device and a front wheel connecting device, the rear wheel connecting device is detachably connected to the rear frame of the bicycle and the rear end of the airbag respectively, and the front wheel connecting device is detachably connected to the front frame of the bicycle and the front end of the airbag respectively.

[0011] Preferably, the rear wheel connecting device comprises a first bottom intermediate tube, a horizontal end portion of the first bottom intermediate tube is detachably connected to an airbag connecting tube, and the airbag connecting tube is cooperatively connected to a hanging ring on the airbag.

[0012] The first bottom middle tube is detachably connected with a first height adjustment tube, the inner side of the first height adjustment tube is rotatably connected with a rear frame fixing tube, and a second connector is provided at the end of the rear frame fixing tube, and the second connector is connected with the rear frame of the bicycle.

[0013] Preferably, the front wheel connecting device includes a second bottom middle tube, and the horizontal end of the second bottom middle tube is detachably connected to an airbag connecting tube, and the airbag connecting tube is cooperatively connected with a hanging ring on the airbag.

[0014] A second height adjustment tube is detachably connected above the second bottom middle tube, a third connector is rotatably connected above the second height adjustment tube, and the third connector is connected to the front frame of the bicycle.

[0015] Preferably, the air pump adopts a piston pump, a waist-shaped ring is fixed to the connecting rod end of the piston, racks are provided on the vertical surfaces on both sides of the inner wall of the waist-shaped ring, a half gear is rotatably provided inside the waist-shaped ring, a rotating wheel is coaxially fixed to the half gear, and the circumferential surface of the rotating wheel abuts against the rear wheel of the bicycle.

[0016] Preferably, the bicycle comprises at least two air bags arranged on both sides of the bicycle.

[0017] Preferably, the airbag comprises an outer wall, a second partition is provided inside the outer wall, and the second partition divides the interior of the airbag into a plurality of independent separation chambers.

[0018] The outer wall is provided with an air charging and discharging valve, and the air charging and discharging valve is connected with each partition cavity through each air charging and discharging pipe.

[0019] Preferably, the inflation and deflation valve is detachably connected to the end of the trachea via a switching device.

[0020] Preferably, the underwater driving device includes a shell, a U-shaped clip is fixed on the top of the shell, a fastening bolt is threadedly connected to the U-shaped clip, the U-shaped clip is connected to the front wheel of the bicycle, and is fixedly connected to the front wheel of the bicycle by rotating the fastening bolt.

[0021] Preferably, a driving cavity is provided at the lower interior of the shell, a rotating shaft is provided coaxially in the driving cavity, blades are provided on the circular axis surface of the rotating shaft located inside the driving cavity, and paddles are provided on the circumferential surface of the rotating shaft located outside the shell.

[0022] An air inlet channel and an air exhaust channel are provided inside the shell and are connected to the driving cavity respectively. The air inlet at the end of the air inlet channel is connected to the air pipe, and the end of the air exhaust channel is provided with an air exhaust port on the outer wall of the shell.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The bicycle is modified by assembling it so that it can travel in water, which increases the fun of riding.

[0025] (2) The air pump, air bag, air pipe, underwater driving device, rear wheel connecting device and front wheel connecting device can be disassembled. After disassembly, the air inside the air bag is emptied and folded and put into the backpack together for easy carrying.

[0026] (3) The airbag is divided into several independent compartments. In this way, if the bicycle is accidentally scratched while riding in the water, it will not completely leak air and lose buoyancy, thereby increasing the safety of riding on the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0028] Figure 1 This is a diagram of the overall structure of a bicycle after modification, which is an expansion device for water travel that can be quickly modified for a bicycle in this application.

[0029] Figure 2 This is a structural diagram of the connection when the airbag is inflated by an expansion device for water travel used to quickly modify a bicycle in this application.

[0030] Figure 3 This is a structural diagram of an air pump in an expansion device for quickly modifying a bicycle for water travel in this application.

[0031] Figure 4 for Figure 3 The first cross-sectional view of

[0032] Figure 5 for Figure 3 The second cross-sectional view of

[0033] Figure 6 This is a diagram of the airbag structure of an expansion device for quickly modifying a bicycle for water travel in this application.

[0034] Figure 7 for Figure 6 A cross-sectional view of

[0035] Figure 8 for Figure 6 Connection structure diagram of the middle filling and deflation valve,

[0036] Fig. 9 for Figure 8 A cross-sectional view of

[0037] Fig.10 for Figure 8 An exploded diagram of

[0038] Fig.11This is a structural diagram of the connection between the air pump and the underwater driving device in an expansion device for quickly modifying a bicycle for water travel in this application.

[0039] Fig.12 This is a structural diagram of a water driving device in an expansion device for quickly modifying a bicycle for water travel in this application.

[0040] Fig.13 for Fig.12 A cross-sectional view of

[0041] Fig.14 This is a structural diagram of the rear wheel connection device in an expansion device for quickly modifying a bicycle for water travel in this application.

[0042] Fig.15 for Fig.14 An exploded diagram of

[0043] Fig.16 for Fig.14 Structure diagram of the middle and rear frame fixing rod.

[0044] Fig.17 for Fig.14 Cross-sectional view of the middle airbag connecting rod,

[0045] Fig.18 This is the exploded view of the airbag connecting rod.

[0046] Fig.19 for Fig.18 A partial enlarged view of the middle A.

[0047] Fig. 20 This is a structural diagram of the front wheel connection device in an expansion device for quickly modifying a bicycle for water travel in this application.

[0048] Fig.21 for Fig. 20 Exploded diagram of .

[0049] In the figure: 1-air pump, 1001-pump body, 10011-piston chamber, 10012-air storage chamber, 10013-air inlet, 1002-piston, 1003-connecting rod, 1004-waist ring, 1005-rack, 1006-first spring, 1007-rotating wheel, 1008-connecting shaft, 1009-half gear, 1010-rotating bracket, 1011-first partition, 1012-through hole, 1013-first stuffy plate, 1014-first sliding rod, 1015-second spring, 1016-first sleeve, 1017-support plate, 1018-first connector, 1019-second stuffy plate, 1020-guide rod, 1021-first spring seat, 1022-third spring, 1023-rubber sheet, 1024-check valve;

[0050] 2-airbag, 2001-outer wall, 2002-second partition, 2003-dividing chamber, 2004-inflating and discharging pipe, 2005-sealing cover, 2006-valve body, 20061-second sleeve, 20062-sealing plate, 20063-internal threaded pipe, 20064-external corresponding hole, 2007-second slide bar, 2008-third stuffy plate, 20081-lower sealing liner, 20082-internal corresponding hole, 2009-pressing ring, 2010-connecting rod, 2011-fourth spring, 2012-clamping ring, 2013-external threaded pipe, 2014-reducing pipe, 2015-upper end, 2016-hanging ring;

[0051] 3- trachea;

[0052] 4- underwater driving device, 4001- housing, 4002- U-shaped card, 4003- fastening bolt, 4004- driving chamber, 4005- air inlet channel, 4006- air inlet, 4007- exhaust channel, 4008- exhaust port, 4009- rotating shaft, 4010- blade, 4011- paddle;

[0053] 5-rear wheel connecting device, 5001-first bottom middle tube, 50011-horizontal plug connector, 50012-vertical plug connector, 5002-first middle tube, 50021-first plug hole, 5003-first height adjustment tube, 50031-second plug hole, 50032-mounting hole, 5004-first plug rod, 5005-rear frame fixing tube, 50051-second connector, 50052-mounting tube, 5006-bolt, 5007-airbag connecting tube, 50071-third plug hole, 5008-telescopic tube, 50081-second spring seat, 5009-plug plate, 5010-second plug rod, 5011-fifth spring;

[0054] 6-front wheel connecting device, 6001-second bottom middle tube, 60011-middle connecting tube, 6002-second middle tube, 60021-fourth plug hole, 6003-second height adjustment tube, 60031-fifth plug hole, 6004-third plug rod, 6005-third connector, 6006-adapter shaft;

[0055] 7- Bicycle. DETAILED DESCRIPTION

[0056] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0057] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "horizontal", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present application.

[0058] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] The following is a further detailed description of the expansion device for quickly converting a bicycle for water travel in the present application in conjunction with the accompanying drawings, but it is not intended to limit the present application.

[0060] An expansion device for quickly modifying a bicycle for traveling on water, comprising Figures 1 to 21 As shown, the bicycle comprises an air pump 1, an air bag 2, an air pipe 3, an underwater driving device 4 and a connecting device. The connecting device comprises a rear wheel connecting device 5 and a front wheel connecting device 6. The rear wheel connecting device 5 is detachably connected to the rear frame of the bicycle 7 and the rear end of the air bag 2, respectively, and the front wheel connecting device 6 is detachably connected to the front frame of the bicycle 7 and the front end of the air bag 2, respectively.

[0061] The air pump 1, the air bag 2, the air pipe 3, the underwater driving device 4, the rear wheel connecting device 5 and the front wheel connecting device 6 can all be disassembled. After disassembly, the air in the air bag 2 is emptied and folded and put into the backpack together. After disassembly, the bicycle 7 can be ridden normally. When it is necessary to ride on the water, the air pump 1, the air bag 2, the air pipe 3, the underwater driving device 4, the rear wheel connecting device 5 and the front wheel connecting device 6 are taken out of the backpack, the air pump 1 is connected to the bicycle first, and then the air bag 2 is inflated through the air pipe 3 to make the air bag 2 bulge. Then, other parts are connected to the bicycle 7, and the air pipe 3 is removed from the air bag 2 and connected to the underwater driving device 4. After the assembly is completed, the bicycle 7 can be ridden on the water.

[0062] Depend on Figures 3 to 5 As shown, the air pump 1 is detachably connected to the rear frame of the bicycle 7, and the rear wheel of the bicycle 7 drives the air pump 1 to work.

[0063] The air pump 1 adopts a piston pump, and a waist-shaped ring 1004 is fixed to the end of the connecting rod 1003 of the piston 1002. Racks 1005 are provided on the vertical surfaces on both sides of the inner wall of the waist-shaped ring 1004. A half gear 1009 is rotatably provided inside the waist-shaped ring 1004. The half gear 1009 is coaxially fixed with a rotating wheel 1007 through a connecting shaft 1008. The circumferential surface of the rotating wheel 1007 abuts against the rear wheel of the bicycle 7.

[0064] The rear wheel of the bicycle 7 rotates, driving the rotating wheel 1007 to rotate, and then driving the half gear 1009 to rotate. The rotating half gear 1009 is meshed with the racks 1005 on both sides of the inner wall of the waist-shaped ring 1004 in turn, driving the waist-shaped ring 1004 to reciprocate, and then driving the piston 1002 to reciprocate, realizing the function of the air pump 1 to exhaust air outwards.

[0065] In this embodiment, the air pump 1 includes a pump body 1001, and a first partition plate 1011 is provided in the internal chamber of the pump body 1001. A through hole 1012 is provided on the first partition plate 1011. The first partition plate 1011 divides the internal chamber of the pump body 1001 into a piston chamber 10011 and an air storage chamber 10012. The piston chamber 10011 and the air storage chamber 10012 are connected through the through hole 1012, and the piston 1002 is slidably arranged inside the piston chamber 10011.

[0066] The pump body 1001 is provided with an air inlet 10013 at the piston cavity 10011. When the piston 1002 moves downward, the external air is drawn into the piston cavity 10011 through the air inlet 10013. When the piston 1002 moves upward, the gas inside the piston cavity 10011 is injected into the gas storage cavity 10012 through the through hole 1012. The gas storage cavity 10012 plays the role of stabilizing the pressure and continuously outputting the gas.

[0067] In order to prevent the gas from being discharged through the air inlet hole 10013 again during the upward movement of the piston 1002, an air inlet check valve is provided on the air inlet hole 10013. In this embodiment, in order to expand the area of ​​the air inlet hole 10013, the air inlet hole 10013 is arranged in a rectangular shape, so the air inlet check valve adopts a second blocking plate 1019, and the size and area of ​​the second blocking plate 1019 is larger than the size and area of ​​the air inlet hole 10013.

[0068] The second blocking plate 1019 is arranged inside the piston cavity 10012, and at least one guide rod 1020 is vertically fixed on the second blocking plate 1019. The guide rod 1020 passes through the pump body 1001, and a first spring seat 1021 is fixed to the end of the guide rod 1020. A third spring 1022 is sleeved on the guide rod 1020 located outside the pump body 1001. Under the thrust of the third spring 1022, the second blocking plate 1019 abuts against the inner wall of the piston cavity 10011 to block the air inlet 10013.

[0069] In order to prevent the second plate 1019 from being loosely closed in the early stage of the upward movement of the piston 1002, a rubber sheet 1023 is provided below or below and on both sides of the second plate 1019, and the other end of the rubber sheet 1023 is in contact with the inner wall of the piston cavity 10011. In this way, even if the second plate 1019 is loosely closed in the early stage of the upward movement of the piston 1002, the airflow generated by the upward movement of the piston 1002 will push the second plate 1019 to be closed and will not be discharged.

[0070] A first spring 1006 is sleeved on the connecting rod 1003 located inside the piston cavity 10011. When the air pump 1 is not installed on the bicycle, the first spring 1006 pushes the piston 1002 to move to the top dead center, shortening the length of the entire air pump 1 and facilitating the storage of the air pump 1.

[0071] A rotating bracket 1010 is fixed at the bottom of the pump body 1001. The rotating bracket 1010 is sleeved on the connecting shaft 1008 to play a limiting role. The two are rotatably connected.

[0072] A first stuffing plate 1013 is provided inside the air storage chamber 10012, and first sliding bars 1014 arranged perpendicularly to each other are coaxially fixed on the first stuffing plate 1013. The first sliding bars 1014 are inserted into the coaxially arranged first sleeve 1016. The first sleeve 1016 plays a guiding role and is fixedly connected to the inner wall of the air storage chamber 10012.

[0073] The first blocking plate 1013 is coaxially arranged with the through hole 1012 , and a second spring 1015 is sleeved on the outside of the first sliding rod 1014 . Under the push of the second spring 1015 , the first blocking plate 1013 blocks the through hole 1012 .

[0074] An exhaust hole connected to the air storage chamber 10012 is provided on the pump body 1001, and a one-way valve 1024 is provided outside the exhaust hole.

[0075] A support plate 1017 is fixed to the end surface of the pump body 1001 facing the rear frame of the bicycle 7, and a first clamp 1018 is rotatably connected to the support plate 1017. The first clamp 1018 is clamped with the rear frame of the bicycle 7. Since the first clamp 1018 is rotatably connected with the support plate 1017, the installation position of the air pump 1 can be easily adjusted. A locking bolt is provided at the rotation axis of the first clamp 1018 and the support plate 1017. After the position of the air pump 1 is fixed, the locking bolt is tightened to prevent the air pump 1 from shifting later.

[0076] The first connector 1018 adopts the existing technology and can adopt a clamp that is sealed by bolts.

[0077] The airbag 2 provides buoyancy for the bicycle 7, so that the bicycle 7 floats on the water. In order to keep the bicycle 7 balanced, in this embodiment, at least two airbags 2 are arranged on both sides of the bicycle 7. The airbags 2 are rectangular after being inflated, and the overall length is the same as or greater than the length of the bicycle 7.

[0078] Depend on Figure 6 , Figure 7 As shown, the airbag 2 includes an outer wall 2001, a second partition 2002 is provided inside the outer wall 2001, and the second partition 2002 divides the inside of the airbag 2 into a plurality of independent partition chambers 2003. In this way, if the bicycle 7 is accidentally scratched during riding in water, it will not completely leak air and lose buoyancy, thereby increasing the safety of riding on water.

[0079] The outer wall 2001 is provided with an air charging and discharging valve, and the air charging and discharging valve is connected with each partition chamber 2003 through each air charging and discharging pipe 2004.

[0080] Depend on Figures 8 to 10 As shown, the inflation and deflation valve includes a valve body 2006 , and the outer portion of the valve body 2006 is sleeved with two spaced-apart clamping rings 2012 that are fixedly connected, and the two clamping rings 2012 are clamped on both sides of the outer wall 2001 .

[0081] The valve body 2006 is sealed at the bottom and open at the top. A plurality of external corresponding holes 20064 are provided on the circular axial surface of the valve body 2006 located on the inner side of the outer wall 2001. The external corresponding holes 20064 correspond to each of the gas charging and discharging pipes 2004 one by one and are connected through them.

[0082] An internal threaded tube 20063 is provided above the valve body 2006. A sealing plate 20062 is provided in the middle of the valve body 2006, and a through hole is provided in the middle of the sealing plate 20062.

[0083] A second sleeve 20061 is vertically provided on the bottom surface of the valve body 2006, a second slide bar 2007 is slidably provided inside the second sleeve 20061, a third blocking plate 2008 is coaxially fixed to the middle of the second slide bar 2007, a lower sealing liner 20081 is sleeved on the circular axis surface below the third blocking plate 2008, and a plurality of corresponding internal holes 20082 are provided on the lower sealing liner 20081.

[0084] A fourth spring 2011 is sleeved on the second slide bar 2007 below the third plate 2008. Under the push of the fourth spring 2011, the top surface of the third plate 2008 abuts against the bottom surface of the sealing plate 20062 to block the through hole on the sealing plate 20062. At this time, the inner corresponding hole 20082 is located above the outer corresponding hole 20064, and the two are arranged alternately.

[0085] A pressure ring 2009 is sleeved on the outer side of the top of the second slide bar 2007 . The pressure ring 2009 is fixedly connected to the second slide bar 2007 via a connecting rod 2010 . The outer wall of the pressure ring 2009 abuts against the inner wall of the internal threaded tube 20063 .

[0086] The charging and discharging valve is detachably connected to the end of the trachea 3 through a switching device. The switching device includes an external threaded tube 2013, a reducer 2014 and an upper end 2015 which are coaxially fixedly connected in sequence. The upper end 2015 is connected to the end of the trachea 3, and the two can be connected by a quick-plug connector or other existing connection methods.

[0087] The external threaded tube 2013 is threadedly connected with the internal threaded tube 20063. When the two are threadedly connected, the external threaded tube 2013 moves downward, presses the pressure ring 2009 downward, and then presses the third plate 2008 downward to open the through hole on the sealing plate 20062. After the third plate 2008 moves downward, the inner corresponding hole 20082 and the outer corresponding hole 20064 are arranged correspondingly, and the two are connected through. The upper end of the inner corresponding hole 20082 extends to the upper surface of the third plate 2008. After the through hole is opened, the external gas flows into each partition chamber 2003 through the through hole, the inner corresponding hole 20082, the outer corresponding hole 20064 and the gas charging and discharging pipe 2004 to be inflated.

[0088] After inflation is completed, the adapter is removed, the third blocking plate 2008 is moved up to block the through hole, the inner corresponding holes 20082 and the outer corresponding holes 20064 are arranged alternately, the inflation and deflation pipes 2004 are blocked and cannot be deflated, and each partition chamber 2003 is sealed.

[0089] After the adapter is removed, the sealing cover 2005 is placed over the internal threaded tube 20063 to prevent debris or water from entering.

[0090] The underwater driving device 4 is detachably connected to the front wheel of the bicycle 7, and the paddle blades 4011 of the underwater driving device 4 are located below the water surface. The air pump 1 injects airflow into the underwater driving device 4 through the air pipe 3, and the airflow drives the paddle blades 4011 to rotate. The rotating paddle blades 4011 drive the bicycle 7 forward on the water surface. By turning the handlebars, the driving direction of the paddle blades 4011 is changed, thereby changing the moving direction of the bicycle 7.

[0091] While riding, you can hold the brakes tightly to lock the front wheel, or lock the front wheel using a bike lock.

[0092] Depend on Fig.12 as well as Fig.13 As shown, the underwater driving device 4 includes a shell 4001, a U-shaped clip 4002 is fixed on the top of the shell 4001, a fastening bolt 4003 is threadedly connected to the U-shaped clip 4002, the U-shaped clip 4002 is clamped on the front wheel of the bicycle 7, and is fixedly connected to the front wheel of the bicycle 7 by rotating the fastening bolt 4003.

[0093] A driving chamber 4004 is provided at the lower interior of the shell 4001 , a rotating shaft 4009 is provided coaxially inside the driving chamber 4004 , blades 4010 are provided on the circular axial surface of the rotating shaft 4009 inside the driving chamber 4004 , and paddles 4011 are provided on the circumferential surface of the rotating shaft 4009 outside the shell 4001 .

[0094] The shell 4001 is provided with an air inlet channel 4005 and an exhaust channel 4007 which are respectively connected to the driving cavity 4004. The air inlet port 4006 at the end of the air inlet channel 4005 is connected to the air pipe 3. The exhaust channel 4007 is provided with an exhaust port 4008 on the outer wall of the shell 4001 at the end.

[0095] Depend on Figures 14 to 19 As shown, the rear wheel connecting device 5 includes a first bottom middle tube 5001, the middle of the first bottom middle tube 5001 is V-shaped, the two ends are arranged horizontally, and the middle part is arranged below the rear wheel of the bicycle 7.

[0096] A horizontal plug connector 50011 and a vertical plug connector 50012 are provided at the horizontal end of the first bottom intermediate tube 5001. The horizontal plug connector 50011 is detachably connected to an airbag connecting tube 5007, and the airbag connecting tube 5007 is connected in cooperation with a hanging ring 2016 on the airbag 2.

[0097] The horizontal plug connector 50011 is plug-connected or threadedly connected to the airbag connecting tube 5007 .

[0098] In order to prevent the airbag connecting tube 5007 from falling off the hanging ring 2016, a third hole 50071 is provided on the airbag connecting tube 5007, and a telescopic tube 5008 is telescopically provided on the third hole 50071. After the airbag connecting tube 5007 passes through the hanging ring 2016, the telescopic tube 5008 extends out of the third hole 50071 and is engaged with the hanging ring 2016.

[0099] In order to facilitate production, a plug plate 5009 is inserted into the airbag connecting tube 5007, and second plug rods 5010 are protruding from both sides of the plug plate 5009. The telescopic tube 5008 is sleeved on the plug rods 5010. A second spring seat 50081 is fixed to the inner end of the telescopic tube 5008, and a fifth spring 5011 is provided between the second spring seat 50081 and the plug plate 5009, and the fifth spring 5011 is sleeved on the second plug rod 5010.

[0100] The provision of the plug plate 5009 facilitates the assembly of the telescopic tube 5008 and the airbag connecting tube 5007 .

[0101] The first bottom intermediate tube 5001 is detachably connected with the first height adjustment tube 5003, and the inside of the first height adjustment tube 5003 is rotatably connected with the rear frame fixing tube 5005. The specific arrangement is that a mounting hole 50032 is provided on the top of the first height adjustment tube 5003, and a mounting tube 50052 is provided at one end of the rear frame fixing tube 5005, and the mounting tube 50052 is provided with an internal thread. The mounting tube 50052 is inserted into the mounting hole 50032, and then clamped on the mounting hole 50032 by a bolt 5006 threadedly connected thereto.

[0102] The end of the rear frame fixing pipe 5005 is provided with a second clamp 50051, and the second clamp 50051 is clamped with the rear frame of the bicycle 7. The second clamp 50051 is a prior art, and adopts a clamp sealed by a bolt.

[0103] In order to adjust the distance between the first bottom middle tube 5001 and the rear frame fixing tube 5005 to adapt to bicycles 7 of different specifications, in this embodiment, the first middle tube 5002 is detachably connected above the vertical plug connector 50012, and the first middle tube 5002 is plugged or threadedly connected to the vertical plug connector 50012.

[0104] The first intermediate tube 5002 is provided with a first plug hole 50021, and the circumferential surface of the first height adjustment tube 5003 is provided with a plurality of second plug holes 50031 arranged at intervals along the axis. The first height adjustment tube 5003 is sleeved on the first intermediate tube 5002, and after one of the second plug holes 50031 is arranged corresponding to the first plug hole 50021, a first plug rod 5004 is passed therebetween, and the first intermediate tube 5002 and the first height adjustment tube 5003 are fixedly connected by the first plug rod 5004.

[0105] Depend on Fig. 20 , Fig.21 As shown, the front wheel connection device 6 comprises a second bottom middle tube 6001, and the horizontal end of the second bottom middle tube 6001 is detachably connected to an airbag connection tube 5007, and the airbag connection tube 5007 is matched and connected with the hanging ring 2016 on the airbag 2. A telescopic tube 5008 is also slidably provided on the airbag connection tube 5007, and the connection method and structure of the two are the same as those of the rear wheel connection device 5.

[0106] A second height adjustment tube 6003 is detachably connected to the upper portion of the second bottom intermediate tube 6001, and a third connector 6005 is rotatably connected to the upper portion of the second height adjustment tube 6003, and the third connector 6005 is connected to the front frame of the bicycle 7. The third connector 6005 is of the prior art, and is a clamp sealed by bolts. The third connector 6005 is rotatably connected to the second height adjustment tube 6003 via a transfer shaft 6006, and the transfer shaft 6006 is of the prior art, and can be tightened by rotating the bolts to prevent further rotation.

[0107] A middle connecting pipe 60011 is provided above the middle of the second bottom middle pipe 6001, and the middle connecting pipe 60011 is detachably connected to the second middle pipe 6002, and the two are plug-connected or threaded.

[0108] The second intermediate tube 6002 is provided with a fourth plug hole 60021, and the second height adjustment tube 6003 is provided with a plurality of fifth plug holes 60031 arranged at intervals along the axis on the circumferential surface. The second height adjustment tube 6003 is sleeved on the second intermediate tube 6002. After one of the fifth plug holes 60031 is arranged corresponding to the fourth plug hole 60021, a third plug rod 6004 is passed therebetween, and the second intermediate tube 6002 and the second height adjustment tube 6003 are fixedly connected by the third plug rod 6004.

[0109] The implementation methods of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. An expansion device for quickly converting a bicycle for traveling on water, characterized in that: It comprises an air pump (1), an air bag (2), an air pipe (3), an underwater driving device (4) and a connecting device; The air pump (1) is detachably connected to the rear frame of the bicycle (7), and the rear wheel of the bicycle (7) drives the air pump (1) to work; The air bag (2) provides buoyancy for the bicycle (7), so that the bicycle (7) floats on the water surface; The underwater driving device (4) is detachably connected to the front wheel of the bicycle (7); the paddle blades (4011) of the underwater driving device (4) are located below the water surface; the air pump (1) injects air into the underwater driving device (4) through the air pipe (3), and the air flow drives the paddle blades (4011) to rotate; The connecting device fixedly connects the bicycle (7) and the airbag (2).

2. The expansion device for quickly converting a bicycle for water travel according to claim 1, characterized in that: The connecting device comprises a rear wheel connecting device (5) and a front wheel connecting device (6), wherein the rear wheel connecting device (5) is detachably connected to the rear frame of the bicycle (7) and the rear end of the air bag (2), and the front wheel connecting device (6) is detachably connected to the front frame of the bicycle (7) and the front end of the air bag (2).

3. The expansion device for quickly converting a bicycle for water travel according to claim 2, characterized in that: The rear wheel connection device (5) comprises a first bottom intermediate tube (5001), the horizontal end of the first bottom intermediate tube (5001) is detachably connected to an airbag connection tube (5007), and the airbag connection tube (5007) is cooperatively connected to a hanging ring (2016) on the airbag (2); A first height adjustment tube (5003) is detachably connected to the top of the first bottom intermediate tube (5001); a rear frame fixing tube (5005) is rotatably connected to the inside of the first height adjustment tube (5003); a second connector (50051) is provided at the end of the rear frame fixing tube (5005); and the second connector (50051) is connected to the rear frame of the bicycle (7).

4. The expansion device for quickly converting a bicycle for water travel according to claim 2, characterized in that: The front wheel connection device (6) comprises a second bottom intermediate tube (6001), the horizontal end of the second bottom intermediate tube (6001) is detachably connected to an airbag connection tube (5007), and the airbag connection tube (5007) is cooperatively connected to a hanging ring (2016) on the airbag (2); A second height adjustment tube (6003) is detachably connected to the top of the second bottom intermediate tube (6001), a third connector (6005) is rotatably connected to the top of the second height adjustment tube (6003), and the third connector (6005) is connected to the front frame of the bicycle (7).

5. The expansion device for quickly converting a bicycle for water travel according to claim 1, 2, 3 or 4, characterized in that: The air pump (1) adopts a piston pump, and a waist-shaped ring (1004) is fixed to the end of the connecting rod (1003) of the piston (1002), and racks (1005) are provided on the vertical surfaces on both sides of the inner wall of the waist-shaped ring (1004). A half gear (1009) is rotatably provided inside the waist-shaped ring (1004), and a rotating wheel (1007) is coaxially fixed to the half gear (1009), and the circumferential surface of the rotating wheel (1007) is in contact with the rear wheel of the bicycle (7).

6. The expansion device for quickly converting a bicycle for water travel according to claim 5, characterized in that: The bicycle comprises at least two air bags (2) arranged on both sides of the bicycle (7).

7. The expansion device for quickly converting a bicycle for water travel according to claim 1, 2, 3, 4 or 6, characterized in that: The airbag (2) comprises an outer wall (2001), a second partition (2002) is provided inside the outer wall (2001), and the second partition (2002) divides the inside of the airbag (2) into a plurality of independent partition chambers (2003); The outer wall (2001) is provided with an air charging and discharging valve, and the air charging and discharging valve is connected to each partition cavity (2003) through each air charging and discharging pipe (2004).

8. The expansion device for quickly converting a bicycle for water travel according to claim 7, characterized in that: The gas charging and discharging valve is detachably connected to the end of the air pipe (3) via a switching device.

9. The expansion device for quickly converting a bicycle for water travel according to claim 1, 2, 3, 4 or 6, characterized in that: The underwater driving device (4) comprises a housing (4001), a U-shaped clamp (4002) is fixed on the top of the housing (4001), a fastening bolt (4003) is threadedly connected to the U-shaped clamp (4002), and the U-shaped clamp (4002) is clamped on the front wheel of the bicycle (7) and fixedly connected to the front wheel of the bicycle (7) by rotating the fastening bolt (4003).

10. The expansion device for quickly converting a bicycle for water travel according to claim 9, characterized in that: A driving chamber (4004) is provided at the lower part of the housing (4001), a rotating shaft (4009) is provided inside the driving chamber (4004) for coaxial rotation, blades (4010) are provided on the circular axial surface of the rotating shaft (4009) inside the driving chamber (4004), and paddles (4011) are provided on the circumferential surface of the rotating shaft (4009) outside the housing (4001); The shell (4001) is provided with an air intake channel (4005) and an air exhaust channel (4007) which are respectively connected to the drive chamber (4004); an air intake port (4006) at the end of the air intake channel (4005) is connected to the air pipe (3); and an air exhaust port (4008) is provided at the end of the air exhaust channel (4007) on the outer wall of the shell (4001).

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