Folding two-wheel drive pedal bicycle

Abstract

A foldable two-wheel pedal bicycle. The front and rear beams are connected by a sleeve and a core tube. The front end of the front beam and the rear end of the rear beam are respectively connected to the front and rear wheels through the front and rear steering heads. The left and right pedals are respectively connected to the left and right driving gears in the sleeve and the core tube through the left and right half shafts, and the driving gears can drive the wheels to rotate through the driven gears, transmission shafts, flexible shafts and wheel axles. The left and right direction rods are respectively connected to the left and right ring gears in the sleeve and the core tube through hinge heads, and the ring gears can drive the wheels to turn through the horizontal racks, connecting rods, vertical racks, column gears and steering heads. When the front and rear beams rotate along the sleeve and the core tube, the positioning pins on the sleeve will cooperate with the sliding grooves on the core tube to separate the front and rear beams to the left and right by a certain distance. Therefore, when the front and rear beams are completely folded, the front and rear wheels will completely overlap. The left and right direction rods are folded together with the front and rear beams through the hinge heads, and then the seat is retracted through the lifting rod mechanism.

Description

Technical Field

[0001] The present invention relates to a bicycle, in particular to a foldable two-wheel drive bicycle that can be driven by two wheels and is convenient to carry. Background Art

[0002] At present, the known bicycles are large in volume and not convenient to carry, and the traditional single-wheel drive mode cannot meet the off-road requirements of riding in the wild. Summary of the Invention

[0003] In order to overcome the deficiencies of the existing bicycles, such as large volume and poor off-road performance, the present invention provides a foldable two-wheel drive bicycle. The foldable two-wheel drive bicycle can improve the off-road passing ability of the vehicle by means of co-driving of the front and rear wheels, and at the same time can be folded and retracted for easy carrying.

[0004] The technical solution adopted by the present invention to solve its technical problems is: The present invention includes wheels, a steering rod, a lock sleeve, a seat, a rear beam, a sleeve, pedals, a front beam, a support seat, a positioning pin, a core tube, a chute, a wheel axle, a transmission shaft, a flexible shaft, a steering head, a right half shaft, a driven gear, a spline shaft, an annulus gear, a left half shaft, a driving gear, a hinge head, a horizontal rack, a connecting rod, a column gear, a vertical rack and a ratchet mechanism.

[0005] Both the front cantilever beam and the rear cantilever beam are tube structures. Support seats are connected to the front end head of the front cantilever beam and the rear end head of the rear cantilever beam respectively, and the support seats are rectangular column structures. Transverse grooves communicating with the inner holes of the front cantilever beam and the rear cantilever beam are respectively opened on the right side surface of the front support seat and the left side surface of the rear support seat. Axial holes longitudinally communicating with the grooves are opened on the upper and lower end faces of the front and rear support seats. Two steering heads are respectively arranged in the grooves on the front and rear support seats. The steering heads are rectangular column structures. Longitudinal rotating shafts are arranged on the upper and lower end faces of the steering heads. The lower end shaft head of the lower rotating shaft of the steering head is set as a column gear. The upper and lower rotating shafts of the steering head are respectively connected in the upper and lower axial holes of the support seat. An axial hole is opened at the transverse central axis position of the steering head. The inner end of the wheel shaft is connected in the axial hole on the steering head, and the outer end of the wheel shaft is connected to the hub of the wheel through a bearing and a ratchet mechanism. The rear end head of the front cantilever beam is vertically connected to the left end head of the sleeve and communicates with the inner hole of the sleeve. The front end head of the rear cantilever beam is vertically connected to the right end head of the core tube and communicates with the inner hole of the core tube. The left half shaft and the right half shaft are respectively connected in the sleeve and the core tube through bearings. The left driving gear is connected to the left half shaft. The left shaft head of the left half shaft extends out of the sleeve and is connected to the foot pedal. A spline hole is opened at the axis position of the left half shaft. The right driving gear is connected to the right half shaft. The right shaft head of the right half shaft extends out of the core tube and is connected to the foot pedal. The left shaft head of the right half shaft is set as a spline shaft. The right end head of the sleeve is sleeved on the left end head of the core tube. The spline shaft on the right half shaft is connected in the spline hole on the left half shaft. A chute is opened on the outer tube wall of the core tube. The chute is a spiral groove structure. A positioning pin cooperating with the chute is arranged on the sleeve. The left and right ring gears are respectively arranged in the inner holes of the sleeve and the core tube. Hinge heads and lock sleeves are arranged at the lower end heads of the left and right direction rods respectively. The hinge heads are locked through the lock sleeves. The hinge heads on the left and right direction rods pass through the through grooves opened on the sleeve and the core tube and are respectively connected to the left and right ring gears. The seat is connected to the rear cantilever beam through a lifting rod mechanism. The left and right driven gears are respectively arranged in the sleeve and the core tube and respectively mesh with the left and right driving gears. The front and rear transmission shafts are respectively arranged in the front cantilever beam and the rear cantilever beam. The front end head of the front transmission shaft is connected to the wheel shaft in the front steering head through a flexible shaft. The rear end shaft head of the front transmission shaft is connected to the left driven gear. The flexible shaft is of a universal coupling structure. The rear end head of the rear transmission shaft is connected to the wheel shaft in the rear steering head through a flexible shaft. The front end shaft head of the rear transmission shaft is connected to the right driven gear. The front and rear vertical racks are respectively arranged in the front and rear support seats and respectively mesh with the column gears on the front and rear steering heads. The front vertical rack is connected to the right end of the column gear on the front steering head. The rear vertical rack is connected to the right end of the column gear on the rear steering head. The front and rear horizontal racks are respectively arranged in the sleeve and the core tube and respectively mesh with the left and right ring gears. The front and rear horizontal racks are both connected to the lower ends of the ring gears. A connecting rod is connected between the front vertical rack and the left rear horizontal rack and between the right horizontal rack and the rear vertical rack.

[0006] When the footrest drives the wheel axle to rotate through the driving gear, driven gear, transmission shaft and flexible shaft driving wheel, the front and rear wheel axles can drive the front and rear wheels to rotate simultaneously through the front and rear ratchet mechanisms respectively.

[0007] When the left direction lever is pulled, the left direction lever will push the front cross rack, connecting rod and front vertical rack forward through the ring gear. When the front vertical rack drives the front wheel to turn left through the column gear on the front steering head, the vehicle can turn left. When the right direction lever is pulled, the right direction lever will pull the rear cross rack, connecting rod and rear vertical rack forward through the ring gear. When the rear vertical rack drives the rear wheel to turn left through the column gear on the rear steering head, the vehicle can turn right.

[0008] When the front cantilever and rear cantilever rotate along the sleeve and core barrel, the sleeve and core barrel can separate the front cantilever and rear cantilever horizontally by a certain distance under the action of the positioning pin and sliding groove. Therefore, when the front cantilever and rear cantilever are completely folded, the front and rear wheels will overlap completely. When the locking of the hinge head by the locking sleeve is released, the left and right direction levers can be rotated around the hinge head to close with the front cantilever and rear cantilever, and then the seat can be retracted through the lifting rod mechanism.

[0009] The beneficial effect of the present invention is to improve the off-road performance of the vehicle by the way of jointly driving the front and rear wheels, and at the same time, it can be folded and shrunk for easy carrying. Description of the Drawings

[0010] The present invention will be further described below in conjunction with the drawings and embodiments.

[0011] Figure 1 is the front view of the present invention.

[0012] Figure 2 is Figure 1 the right view of

[0013] Figure 3 is Figure 2 the top view of

[0014] Figure 4 is Figure 3 the schematic diagram of left turn of

[0015] Figure 5 is Figure 3 the schematic diagram of right turn of

[0016] Figure 6 is Figure 1 the enlarged schematic diagram when folded.

[0017] Figure 7 is Figure 6 the right view of

[0018] Figure 8 is Figure 1 the enlarged A-A sectional view of

[0019] Figure 9 is Figure 8 a schematic structural view when turning.

[0020] Figure 10 is Figure 1 an enlarged view of the B-B section of

[0021] Figure 11 is Figure 10 a schematic structural view when folding.

[0022] Figure 12 is Figure 2 an enlarged view of the C-C section of

[0023] Figure 13 is Figure 12 a schematic structural view when folding the steering rod.

[0024] Figure 14 is Figure 2 an enlarged view of the partial D-D section of

[0025] In the figure: 1. Wheel. 2. Steering rod. 3. Lock sleeve. 4. Seat. 5. Rear cantilever. 6. Sleeve. 7. Pedal. 8. Front cantilever. 9. Support seat. 10. Positioning pin. 11. Core tube. 12. Slide groove. 13. Ratchet mechanism. 14. Wheel axle. 15. Transmission shaft. 16. Flexible shaft. 17. Steering head. 18. Right half shaft. 19. Driven gear. 20. Spline shaft. 21. Ring gear. 22. Left half shaft. 23. Driving gear. 24. Hinge head. 25. Transverse rack. 26. Connecting rod. 27. Cylindrical gear. 28. Vertical rack. Detailed implementation manners

[0026] In Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 10 , Figure 12 , Figure 14Among them, the front cantilever beam 8 and the rear cantilever beam 5 are both tube structures. Support seats 9 are connected to the front end head of the front cantilever beam 8 and the rear end head of the rear cantilever beam 5 respectively, and the support seats 9 are rectangular column structures. Transverse grooves communicating with the inner holes of the front cantilever beam 8 and the rear cantilever beam 5 are respectively provided on the right side surface of the front support seat 9 and the left side surface of the rear support seat 9, and shaft holes longitudinally communicating with the grooves are provided on the upper and lower end surfaces of the front and rear support seats 9. Two steering heads 17 are respectively arranged in the grooves on the front and rear support seats 9. The steering heads 17 are rectangular column structures. Longitudinal rotating shafts are arranged on the upper and lower end surfaces of the steering heads 17. The lower end shaft head of the lower rotating shaft of the steering head 17 is set as a column gear. The upper and lower rotating shafts of the steering head 17 are respectively connected in the upper and lower shaft holes of the support seat 9. An shaft hole is provided at the transverse central axis position of the steering head 17. The inner end of the wheel shaft 14 is connected to the shaft hole on the steering head 17, and the outer end of the wheel shaft 14 is connected to the hub of the wheel 1 through a bearing and a ratchet mechanism 13. The rear end head of the front cantilever beam 8 is vertically connected to the left end head of the sleeve 6 and communicates with the inner hole of the sleeve 6. The front end head of the rear cantilever beam 5 is vertically connected to the right end head of the core barrel 11 and communicates with the inner hole of the core barrel 11. The left half shaft 22 and the right half shaft 18 are respectively connected in the sleeve 6 and the core barrel 11 through bearings. The left driving gear 23 is connected to the left half shaft 22. The left shaft head of the left half shaft 22 extends out of the sleeve 6 and is connected to the pedal 7. A spline hole is provided at the axis position of the left half shaft 22. The right driving gear 23 is connected to the right half shaft 18. The right shaft head of the right half shaft 18 extends out of the core barrel 11 and is connected to the pedal 7. The left shaft head of the right half shaft 18 is set as a spline shaft 20. The right end head of the sleeve 6 is sleeved on the left end head of the core barrel 11. The spline shaft 20 on the right half shaft 18 is connected in the spline hole on the left half shaft 22. A chute 12 is provided on the outer barrel wall of the core barrel 11. The chute 12 is a spiral groove structure. A positioning pin 10 cooperating with the chute 12 is provided on the sleeve 6. Left and right ring gears 21 are respectively arranged in the inner holes of the sleeve 6 and the core barrel 11. Hinge heads 24 and lock sleeves 3 are provided at the lower end heads of the left and right two direction rods 2. The hinge head 25 is locked through the lock sleeve 3. The hinge heads 24 on the left and right direction rods 2 pass through the through grooves provided on the sleeve 6 and the core barrel 11 and are respectively connected to the left and right ring gears 21. The seat 4 is connected to the rear cantilever beam 5 through a lifting rod mechanism. Left and right two driven gears 19 are respectively arranged in the sleeve 6 and the core barrel 11 and respectively mesh with the left and right driving gears 23. Front and rear two transmission shafts 15 are respectively arranged in the front cantilever beam 8 and the rear cantilever beam 5. The front end head of the front transmission shaft 15 is connected to the wheel shaft 14 in the front steering head 17 through a flexible shaft 16. The rear end shaft head of the front transmission shaft 15 is connected to the left driven gear 19. The flexible shaft 16 is of a universal coupling structure. The rear end head of the rear transmission shaft 15 is connected to the wheel shaft 14 in the rear steering head 17 through a flexible shaft 16. The front end shaft head of the rear transmission shaft 15 is connected to the right driven gear 19.The front and rear vertical racks 28 are respectively arranged in the front and rear support seats 9 and are respectively meshed with the spur gears on the front and rear swivel heads 17. The front vertical rack 28 is connected to the right end of the spur gear on the front swivel head 17, and the rear vertical rack 28 is connected to the right end of the spur gear on the rear swivel head 17. The front and rear horizontal racks 25 are respectively arranged in the sleeve 6 and the core barrel 11 and are respectively meshed with the left and right ring gears 21. The front and rear horizontal racks 25 are both connected to the lower end of the ring gear 21. The front vertical rack 28 and the left rear horizontal rack 25, and the right horizontal rack 25 and the rear vertical rack 28 are both connected by connecting rods 26.

[0027] In Figure 1 , Figure 2 , Figure 8 , Figure 10 , Figure 12 When the foot pedal 7 drives the wheel axle 14 to rotate through the driving gear 23, the driven gear 19, the transmission shaft 15 and the flexible shaft 16, the front and rear wheel axles 14 can respectively drive the front and rear wheels 1 to rotate simultaneously through the front and rear ratchet mechanisms 13.

[0028] In Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 14 When the left direction rod 2 is pulled, the left direction rod 2 will push the front horizontal rack 25, the connecting rod 26 and the front vertical rack 28 forward through the ring gear 21. When the front vertical rack 28 drives the front wheel 1 to turn left through the spur gear on the front swivel head 17, the vehicle can turn left. When the right direction rod 2 is pulled, the right direction rod 2 will pull the rear horizontal rack 25, the connecting rod 26 and the rear vertical rack 28 forward through the ring gear 21. When the rear vertical rack 28 drives the rear wheel 1 to turn left through the spur gear on the rear swivel head 17, the vehicle can turn right.

[0029] In Figure 1 , Figure 6 , Figure 10 , Figure 11 , Figure 12 , Figure 13 When the front cantilever 8 and the rear cantilever 5 rotate along the sleeve 6 and the core barrel 11, the sleeve 6 and the core barrel 11 can separate the front cantilever 8 and the rear cantilever 5 horizontally by a certain distance under the action of the positioning pin 10 and the sliding groove 12. Therefore, when the front cantilever 8 and the rear cantilever 5 are completely folded, the front and rear wheels 1 will completely overlap. When the locking of the locking sleeve 3 on the hinge head 24 is released, the left and right direction rods 2 can rotate around the hinge head 24 and close together with the front cantilever 8 and the rear cantilever 5, and then the seat 4 can be retracted through the lifting rod mechanism.

Claims

1. A folding two-wheel drive pedal bicycle, which comprises wheels, a front cantilever beam, a rear cantilever beam, a steering rod, a seat, pedals, a left half shaft, a right half shaft, a driving gear, a driven gear, a flexible shaft, a wheel axle, a steering head, an annular gear, a transverse rack, a column gear, a vertical rack and a ratchet mechanism, and is characterized in that: Both the front cantilever beam and the rear cantilever beam are tube structures. Support seats are connected to the front end head of the front cantilever beam and the rear end head of the rear cantilever beam respectively. Transverse grooves communicating with the inner holes of the front cantilever beam and the rear cantilever beam are respectively formed on the right side surface of the front support seat and the left side surface of the rear support seat. Axial holes longitudinally communicating with the grooves are formed on the upper and lower end surfaces of the front and rear support seats. Two steering heads are respectively arranged in the grooves on the front and rear support seats. Longitudinal rotating shafts are arranged on the upper and lower end surfaces of the steering heads. The lower end shaft head of the lower rotating shaft of the steering head is set as a column gear. The upper and lower rotating shafts of the steering head are respectively connected in the upper and lower axial holes of the support seat. An axial hole is formed at the transverse central axis position of the steering head. The inner end of the wheel shaft is connected in the axial hole on the steering head. The outer end of the wheel shaft is connected to the hub of the wheel through a bearing and a ratchet mechanism. The rear end head of the front cantilever beam is vertically connected to the left end head of the sleeve and communicates with the inner hole of the sleeve. The front end head of the rear cantilever beam is vertically connected to the right end head of the core barrel and communicates with the inner hole of the core barrel. The left half shaft and the right half shaft are respectively connected in the sleeve and the core barrel through bearings. The left driving gear is connected to the left half shaft. The left shaft head of the left half shaft extends out of the sleeve and is connected to the footrest. A spline hole is formed at the axis position of the left half shaft. The right driving gear is connected to the right half shaft. The right shaft head of the right half shaft extends out of the core barrel and is connected to the footrest. The left shaft head of the right half shaft is set as a spline shaft. The right end head of the sleeve is sleeved on the left end head of the core barrel. The spline shaft on the right half shaft is connected in the spline hole on the left half shaft. A sliding groove is formed on the outer barrel wall of the core barrel. A positioning pin matched with the sliding groove is arranged on the sleeve. Left and right ring gears are respectively arranged in the inner holes of the sleeve and the core barrel. Hinge heads and lock sleeves are arranged at the lower end heads of the left and right direction rods. The hinge heads on the left and right direction rods pass through the through grooves formed on the sleeve and the core barrel and are respectively connected to the left and right ring gears. The saddle is connected to the rear cantilever beam through a lifting rod mechanism. Left and right driven gears are respectively arranged in the sleeve and the core barrel and respectively mesh with the left and right driving gears. Front and rear transmission shafts are respectively arranged in the front cantilever beam and the rear cantilever beam. The front end head of the front transmission shaft is connected to the wheel shaft in the front steering head through a flexible shaft. The rear end shaft head of the front transmission shaft is connected to the left driven gear. The rear end head of the rear transmission shaft is connected to the wheel shaft in the rear steering head through a flexible shaft. The front end shaft head of the rear transmission shaft is connected to the right driven gear. Front and rear vertical racks are respectively arranged in the front and rear support seats and respectively mesh with the column gears on the front and rear steering heads. Front and rear horizontal racks are respectively arranged in the sleeve and the core barrel and respectively mesh with the left and right ring gears. Connecting rods are respectively connected between the front vertical rack and the left horizontal rack and between the right horizontal rack and the rear vertical rack. The flexible shaft is of a universal coupling type structure. The front vertical rack is connected to the right end of the column gear on the front steering head. The rear vertical rack is connected to the right end of the column gear on the rear steering head.

2. The foldable two-wheel pedal bicycle according to claim 1, wherein: The support seat is of a rectangular column structure.

3. The foldable two-wheel pedal bicycle according to claim 1, wherein: The steering head is of a rectangular column structure.

4. The foldable two-wheel pedal bicycle according to claim 1, wherein: The sliding groove is of a spiral groove structure.

5. The foldable two-wheel drive pedal bicycle according to claim 1, wherein: The hinge head is locked by the lock sleeve.

6. The foldable two-wheel pedal bicycle according to claim 1, characterized in that: Both the front and rear horizontal racks are connected to the lower ends of the ring gears.

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