Box folding electric bicycle

Abstract

The present application relates to a folding electric bicycle, in order to solve the existing folding electric bicycle operation complex, riding unreliable and unsafe problems, provide a box type folding electric bicycle, including box, the front and rear sides of the box have opening, box is provided with lifting mechanism and telescopic car body, the lifting mechanism is connected with box and telescopic car body, the telescopic car body includes front wheel assembly and rear wheel assembly, front wheel assembly and rear wheel assembly respectively from the opening of the front and rear sides of the box linearly extend, unfolding, lifting mechanism acts on the box and telescopic car body respectively, lift the box makes the box leave the ground, the present application has the characteristics of high safety, simple operation, riding stable and reliable structure.

Description

Technical Field

[0001] The invention relates to a folding electric bicycle, in particular to a box-type folding electric bicycle. Background Art

[0002] Box-type folding electric vehicles have the following shortcomings:

[0003] 1. Failure to meet the requirements of the relevant national technical standards for electric bicycles GB / 17761-2018, such as the lack of a chain pedal mechanism;

[0004] 2. The conversion from storage state to riding state, or vice versa, needs to be done manually, with a low degree of automation, long conversion time and complicated operation;

[0005] 3. The distance between the front and rear wheels is small, making it unsafe to ride on the road, prone to traffic accidents, and unable to be registered. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: to provide a box-type foldable electric bicycle in order to solve the problems of complex operation, unreliable riding and unsafety of existing box-type foldable electric vehicles.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a box-type folding electric bicycle, including a box body, the front and rear sides of the box body have openings, a lifting mechanism and a retractable body are provided in the box body, the lifting mechanism connects the box body and the retractable body, the retractable body includes a front wheel assembly and a rear wheel assembly, the front wheel assembly and the rear wheel assembly respectively extend straightly from the openings on the front and rear sides of the box body to be unfolded, the lifting mechanism acts on the box body and the retractable body respectively to lift the box body so that the box body is off the ground.

[0008] Both the front and rear wheels can be extended from the box, which increases the distance between the front and rear wheels and makes riding more stable and safer.

[0009] Furthermore, the lifting mechanism of the box body includes a lifting drive mechanism and a lifting guide mechanism, the lifting drive mechanism includes an electric push rod, a first connecting rod and a second connecting rod, the upper end of the first connecting rod is hinged on the box body, the lower end of the first connecting rod is hinged on the upper end of the second connecting rod, and the lower end of the second connecting rod is hinged on the retractable body, one end of the electric push rod is hinged on the upper end of the first connecting rod, and the other end of the electric push rod is hinged on the retractable body, and a limiting structure is provided between the first connecting rod and the second connecting rod, which is used to limit the first connecting rod and the second connecting rod after the first connecting rod and the second connecting rod are opened to the dead point, and the hinge point between the electric push rod and the first connecting rod and the hinge point between the first connecting rod and the box body are staggered, so that the electric push rod can push the first connecting rod to rotate by extending, so that the first connecting rod and the second connecting rod in the folded state are opened to the dead point; the lifting guide mechanism is used to guide the lifting and lowering of the box body relative to the retractable body.

[0010] The over-dead point design enables the elevated box to have a higher load-bearing capacity.

[0011] Furthermore, the rear wheel assembly has a leg support mechanism, and the box body has a matching leg support opening mechanism, the leg support mechanism is installed on the rear wheel assembly for supporting the unfolded box-type folding electric bicycle; the leg support mechanism includes a connecting base and a leg support, the leg support is rotatably installed on the connecting base, the leg support has an open state and a closed state, when the leg support is rotated to the open state, the leg support is in a position pointing to the ground, for supporting the unfolded box-type folding electric bicycle, when the leg support is rotated to the closed state, the leg support is lifted off the ground and is in a position tilted toward the rear of the vehicle; the leg support opening mechanism has an elastic toggle arm blocking the path of the leg support in and out of the box body, when the rear wheel assembly is linearly extended out of the box body, the leg support in the closed state touches the elastic toggle arm, so that the elastic toggle arm toggle the leg support to rotate to the open state, and when the rear wheel assembly is linearly retracted into the box body, the leg support in the open state touches the elastic toggle arm, so that the elastic toggle arm toggle the leg support to rotate to the closed state, and the elastic toggle arm elastically deforms to allow the leg to enter and exit the box body.

[0012] The foot support mechanism is automatically in the open state and the closed state when entering and exiting the box under the toggle of the foot support opening mechanism. It is easy to use. The foot support mechanism can play a role of making way when the box is in the closed state, which is convenient for the installation of internal components of the box or freeing up the internal space of the box.

[0013] Furthermore, the outer edge of the connecting base has a first positioning surface and a second positioning surface, and a reset slider is mounted on the support leg, which is reset by a reset spring. When the reset spring drives the reset slider to press against the first positioning surface, the support leg is positioned in an open state, and when the reset spring drives the reset slider to press against the second positioning surface, the support leg is positioned in a closed state. There is also a limiting structure between the support leg and the connecting base, which is used to limit the support leg from rotating toward the front side of the vehicle when the support leg is in the open state.

[0014] Furthermore, the leg opening mechanism includes a toggle block and a torsion spring. The torsion spring is sleeved on the mounting shaft in the box body. One torsion arm of the torsion spring serves as an elastic toggle arm. The other button arm of the torsion spring is fixed on the box body. The elastic toggle arm has a toggle block.

[0015] Furthermore, the retractable body also includes a chain pedal mechanism for driving the rear wheel of the rear wheel assembly through a chain and a pedal, the chain pedal mechanism includes a front sprocket, a rear flywheel, a chain and a pedal, the front sprocket is located in the box, the rear flywheel is installed on the rear wheel to drive the rear wheel, the chain is sleeved on the front sprocket and the rear flywheel, a chain limiter is provided on the upper and lower sides of the front sprocket, for limiting the chain to the front sprocket, the chain limiter of the front sprocket is located at the chain entry and exit position of the front sprocket, a chain limiter is provided on the upper and lower sides of the rear flywheel, for limiting the chain to the rear flywheel, the chain limiter of the rear flywheel is located at the chain entry and exit position of the rear flywheel, and the pedal is located outside the box and is detachably connected to the center axis of the front sprocket.

[0016] Furthermore, the front wheel assembly includes a foldable handlebar mechanism, a front wheel, a front fork and a front electric telescopic sleeve device, the front wheel is mounted on the front fork, and the front fork is mounted in front of the extended section of the front electric telescopic sleeve device; the rear wheel assembly includes a rear wheel, a rear fork and a rear electric telescopic sleeve device, the rear wheel is mounted on the rear fork, and the rear fork is mounted in the rear of the extended section of the rear electric telescopic sleeve device, both the front electric telescopic sleeve device and the rear electric telescopic sleeve device include a telescopic sleeve and an electric screw drive mechanism for driving the telescopic sleeve to extend and retract, the screw of the electric screw drive mechanism is located in the telescopic sleeve, and the non-extending sections of the telescopic sleeves of the front electric telescopic sleeve device and the rear electric telescopic sleeve device are assembled together in a stacked manner.

[0017] Furthermore, the foldable handlebar mechanism folds forward by folding forward. The foldable handlebar mechanism includes a U-shaped handlebar support frame, a folding riser, and a foldable handle. The lower end of the U-shaped handlebar support frame is connected to the front fork via the folding riser. The foldable handle is mounted on the upper ends of the two side arms of the U-shaped handlebar support frame. The foldable handle folds downward through its own folding structure and closes together with the two side arms of the U-shaped handlebar support frame. The gap between the side arms of the U-shaped handlebar support frame provides clearance for the front wheel, allowing the front wheel to pass through the U-shaped handlebar support frame after the foldable handlebar mechanism is folded. The design of the forward-folding foldable handlebar mechanism not only facilitates the folding operation, but also reduces the space occupied by the box.

[0018] Furthermore, the lifting guide mechanism is a guide post guide mechanism, there are 4 guide post guide mechanisms, which are respectively located at the four corners of the box body. The guide post guide mechanism includes a guide post and a guide sleeve sleeve on the guide post. The guide post is fixed on the box body, and the guide sleeve is fixed on the retractable body; there are two sets of lifting drive mechanisms, which are respectively located on the left and right sides of the retractable body.

[0019] Furthermore, the lifting mechanism is an electric lifting mechanism, and the retractable body is an electric retractable body, and the retractable body extends the front wheel assembly and the rear wheel assembly in a straight line by electric means.

[0020] In order to strengthen the box structure, the box further includes a box shell and an internal skeleton structure supporting the box shell. The internal skeleton structure includes an upper skeleton, a lower skeleton and four guide pillars. The upper skeleton and the lower skeleton are connected by four guide pillars. The four guide pillars are located at the four corners of the box; each of the four guide pillars is equipped with a guide sleeve, which is fixed on the retractable body.

[0021] Furthermore, the box body includes a box body shell and an internal skeleton structure supporting the box body shell. The internal skeleton structure includes an upper skeleton, a lower skeleton and four guide pillars. The upper skeleton and the lower skeleton are connected by four guide pillars. The four guide pillars are located at the four corners of the box body; each of the four guide pillars is equipped with a guide sleeve, which is fixed on the retractable body.

[0022] Furthermore, rollers are installed at the bottom of the box body, and a saddle is installed at the top of the box body.

[0023] The beneficial effects of the present invention are as follows: the box-type folding electric bicycle of the present invention first meets the relevant national technical standards for electric bicycles GB / 17761-2018; can meet the needs of users for short-distance convenient travel such as right-of-way driving, short-distance use, subway travel, tourism, and business trips; secondly, the conversion process of the entire vehicle is optimized. Except for the manual deployment of the foldable handlebar mechanism and the installation of the pedals, other folding and storage conversions are completed by the motor, with a high degree of automation, simple operation, and a short conversion process. In summary, the present invention has the characteristics of high safety, simple operation, stable riding, and reliable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and examples.

[0025] Figure 1 It is a schematic structural diagram of the present invention after storage is completed.

[0026] Figure 2 It is a structural schematic diagram of the box body of the present invention.

[0027] Figure 3 It is a schematic diagram of the structure when the retractable body is stored in the internal skeleton structure.

[0028] Figure 4 It is a structural diagram of the internal skeleton structure of the box.

[0029] Figures 5 to 7 It is a structural diagram of the lifting mechanism.

[0030] Figure 8 It is a structural diagram of the central axis and mounting frame.

[0031] Figures 9 to 12 It is a structural schematic diagram of a retractable vehicle body.

[0032] Figure 13 and Figure 14 This is a diagram showing the coordinated use of the leg support mechanism and the leg support opening mechanism.

[0033] Figure 15 It is a structural diagram of the leg opening mechanism.

[0034] Figure 16 It is a structural diagram of the leg support mechanism.

[0035] Figures 17 to 19 It is a structural schematic diagram of a foldable handlebar mechanism.

[0036] Figure 20 This is a diagram of the installation of the pedals.

[0037] Figure 21 and Figure 22 It is a schematic diagram of the structure when riding.

[0038] Figure 23 This is a schematic diagram of the structure in the storage state.

[0039] In the figure: 1. Box, 2. Front wheel, 3. Rear wheel, 4. Front screw nut, 5. Front telescopic sleeve, 6. Rear telescopic motor, 7. Front fork, 8. Rear screw, 9. Front screw, 10. Rear fork, 11. Front telescopic motor, 12. Bottom shaft, 13. Front chainring, 14. Chain, 15. Rear telescopic sleeve, 16. Guide post, 17. Electric push rod, 18. Limiting structure, 19. Guide sleeve, 20. Rear screw nut, 21. Roller, 22. Pedal, 23. First positioning surface, 24. Second positioning surface, 25. Third positioning surface, 26. Saddle, 27. Hinge, 28. Door panel, 29. Rear flywheel, 30. Folding joint, 31. Reset spring, 32. Support foot, 33. First connecting rod, 34. Second connecting rod, 35. Reset slider, 36. Card sleeve, 37. Lock, 38. Foldable handle, 39. U-shaped handlebar support, 40. Connecting shaft, 41. Rear limit column upper, 42. Rear limit column lower, 43. Front limit column upper, 44. Front limit column lower, 45. Gasket, 46. Connecting base, 47. Torsion spring, 48. Compression spring, 49. Connecting seat, 50. Front damping spring, 51. Rear damping spring, 52. Toggle block, 53. Upper frame, 54. Lower frame, 55. Protective sleeve, 56. Mounting frame, 57. Reinforced connecting rod. DETAILED DESCRIPTION

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0041] like Figures 1 to 23The box-type folding electric bicycle shown mainly includes a box body, a lifting mechanism, a retractable body and a foldable handlebar mechanism of the retractable body:

[0042] 1. Box 1

[0043] The box body 1 is used to accommodate the foldable retractable body. The lifting mechanism and the retractable body are located inside the box body 1. A saddle 26 is installed on the top of the box body 1. The user sits on the saddle 26 of the box body 1. Of course, the saddle 26 can also be omitted and the user can sit directly on the box body 1. Figure 1 and Figure 2 The front and rear sides of the middle box body 1 are openings, and the retractable body is installed in the box body 1 through the openings. The front and rear wheels can be extended from the box body 1, which increases the distance between the front and rear wheels and makes riding more stable and safe.

[0044] A lifting mechanism is installed between the box body 1 and the retractable body; the openings on the front and rear sides are hingedly installed with double-door-type door panels 28 through hinges 27, and there are a total of four door panels 28 on the front and rear sides. Installing the door panels 28 can make the appearance of the box body 1 more beautiful, and can also prevent foreign objects from entering the box body 1 and affecting its use.

[0045] In order to further improve the intelligence of the product and make the folding and storage conversion fully electric, an electric drive unit is installed at the hinge of the door panel 28 and the box body 1, and the electric drive unit drives the opening and closing of the door panel 28. One door panel 28 is installed with one electric drive unit, for a total of four, and the four electric drive units open and close synchronously. The electric drive unit is an existing commercially available product. The rotation of the motor of the electric drive unit drives the door panel 28 to rotate. After it rotates into place, the motor stops rotating, presenting the door panel 28 in a fully open state or the door panel 28 in a closed state. The opening and closing of the door panel 28 is achieved by controlling the forward or reverse rotation of the motor.

[0046] The box body 1 includes a box body shell and an internal skeleton structure supporting the box body shell. The internal skeleton structure includes an upper skeleton 53, a lower skeleton 54 and four guide pillars 16. The upper skeleton 53 and the lower skeleton 54 are connected by the four guide pillars 16. The four guide pillars 16 are located at the four corners of the box body 1.

[0047] In order to facilitate the movement of the box 1 after storage, rollers 21 are installed at the bottom of the box 1. The rollers 21 are specifically four universal wheels. The four universal wheels are installed at the inner side of the four corners of the box 1, giving way to the lower frame 53 of the box 1. The universal wheels are installed in the concave cavity at the bottom of the box 1. This design can effectively lower the height of the box 1 from the ground, reduce the lifting stroke of the lifting mechanism, shorten the time of unfolding and storing, and also reduce the space occupied by the lifting mechanism in the box 1. At the same time, lowering the center of gravity of the entire product can make the box 1 less likely to tip over when moving.

[0048] 2. Lifting mechanism

[0049] The lifting mechanism is used to lift the box 1 and distribute the rider's weight between the box 1 and the retractable body during riding. The lifting mechanism includes a lifting drive mechanism and a lifting guide mechanism. There are two sets of lifting drive mechanisms, located on the left and right sides of the retractable body.

[0050] The lifting drive mechanism includes an electric push rod 17, a first link 33 and a second link 34. The upper end of the first link 33 is hinged on the box body 1, the lower end of the first link 33 is hinged to the upper end of the second link 34, and the lower end of the second link 34 is hinged to the retractable body. One end of the electric push rod 17 is hinged to the upper end of the first link 33, and the other end of the electric push rod 17 is hinged to the central axis 12 of the retractable body. A limiting structure 18 is provided between the first link 33 and the second link 34, which is used to limit the first link 33 and the second link 34 after the first link 33 and the second link 34 are opened to the dead point. The hinge point of the electric push rod 17 and the first link 33 and the hinge point of the first link 33 and the box body 1 are staggered, so that the electric push rod 17 can push the first link 33 to rotate by extending, so that the first link 33 and the second link 34 in the folded state are opened to the dead point. The over-dead point design enables the elevated box to have a higher load-bearing capacity.

[0051] The lifting guide mechanism is used to guide the box body 1 to lift and lower relative to the retractable body. The lifting guide mechanism adopts a guide post guide mechanism. There are four guide post guide mechanisms, which are respectively located at the four corners of the box body 1. The guide post guide mechanism includes a guide post 16 and a guide sleeve 19 mounted on the guide post 16. The guide sleeve 19 is fixed on the retractable body.

[0052] The electric push rod 17 is mounted on the outside of the mounting frame 56. There are two mounting frames 56. A round hole is opened at the bottom of the mounting frame 56. A bearing is installed in the round hole. The central shaft 12 is installed in the bearing. The upper part of the mounting frame 56 is connected to the retractable body. The front sprocket 13 and the chain 14 are located in the middle position of the two mounting frames 56. The outside of the mounting frame 56 is a mounting hole for installing the fixed end of the electric push rod 17.

[0053] 3. Retractable body

[0054] The retractable vehicle body is the riding main body, including a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly are respectively extended or retracted straightly from the openings on the front and rear sides of the box body 1 to be unfolded or stored.

[0055] The front wheel assembly includes a foldable handlebar mechanism, a front wheel 2, a front fork 7 and a front electric telescopic sleeve device, the front electric telescopic sleeve device includes a front telescopic sleeve 5 and a front electric screw drive mechanism, the front telescopic sleeve 5 is generally two-section or three-section, and this embodiment is a two-section front telescopic sleeve 5, one section is a fixed section, and the other section is an extension section. The front wheel 2 is mounted on the front fork 7, and the front fork 7 is mounted on the front of the extension section of the front telescopic sleeve 5. The front electric screw drive mechanism is used to drive the front telescopic sleeve 5 to extend and retract; the front electric screw drive mechanism includes a front screw nut 4, a front screw 9, and a front telescopic motor 11 And the front damping spring 50, the front telescopic motor 11 is installed at the rear end of the fixed section of the front telescopic sleeve 5, the front screw rod 9 is driven to rotate by the front telescopic motor 11, the front screw rod 9 is located in the front telescopic sleeve 5, and is threadedly matched with the front screw rod nut 4. The front screw rod nut 4 is fixedly mounted at the rear end of the extended section of the front telescopic sleeve 5, and the front damping spring 50 is installed at the end position of the front screw rod 9. The front telescopic motor 11 drives the front screw rod 9 to rotate, and the front screw rod 9 and the front screw rod nut 4 are threadedly matched to pull or push the extended section of the front telescopic sleeve 5 forward or retract backward. When the front screw rod nut 4 moves to the end position of the front screw rod 9, the front screw rod nut 4 begins to compress the front damping spring 50. When the reaction force of the front damping spring 50 is greater than the force of the front telescopic motor 11, the front telescopic motor 11 stops rotating to prevent the front wheel 2 from extending or retracting into position and then excessively moving to damage the front telescopic motor 11 or affect subsequent use.

[0056] The rear wheel assembly includes a rear wheel 3, a rear fork 10 and a rear electric telescopic sleeve device, the rear electric telescopic sleeve device includes a rear telescopic sleeve 15, a rear electric screw drive mechanism, the rear telescopic sleeve 15 is generally two or three sections, the present embodiment is a two-section rear telescopic sleeve 15, one section is a fixed section, the other section is an extended section, the rear wheel 3 is mounted on the rear fork 10, the rear fork 10 is mounted on the rear part of the extended section of the rear telescopic sleeve 15, the rear electric screw drive mechanism is used to drive the rear telescopic sleeve 15 to extend and retract; the rear electric screw drive mechanism includes a rear screw nut 20, a rear screw 8, a rear telescopic motor 6 and a rear damping spring 51, the rear telescopic motor 6 is mounted on the front end of the fixed section of the rear telescopic sleeve 15, the rear screw 8 is driven to rotate by the rear telescopic motor 6, the rear screw 8 is located in the rear telescopic sleeve 15, and is threadedly matched with the rear screw nut 20. The rear screw nut 20 is fixedly mounted on the front end of the extended section of the rear telescopic sleeve 15, the rear damping spring 51 is mounted at the end position of the rear screw 8, and the rear telescopic motor 6 is installed. The rear screw rod 88 is driven to rotate, and the rear screw rod 8 and the rear screw rod nut 20 are threadedly matched to pull or push the extended section of the rear telescopic sleeve 15 to extend forward or retract backward. When the rear screw rod nut 20 moves to the end position of the rear screw rod 8, the rear screw rod nut 20 begins to compress the rear damping spring 51. When the reaction force of the rear damping spring 51 is greater than the force of the rear telescopic motor 6, the rear telescopic motor 6 stops rotating to prevent the rear wheel 3 from extending or retracting into position and then moving excessively to damage the rear telescopic motor 6 or affect subsequent use.

[0057] The fixed sections of the front telescopic sleeve 5 and the rear telescopic sleeve 15 are stacked and fixed together one above the other.

[0058] The rear wheel assembly also has a foot support mechanism, and the box body 1 has a matching foot support opening mechanism. The foot support mechanism is installed on the rear wheel assembly and is used to support the unfolded box-type folding electric bicycle. The foot support mechanism includes a connecting base 46 and a foot support 32. The foot support 32 is rotatably installed on the connecting base 46. The foot support 32 has an open state and a closed state. When the foot support 32 is rotated to the open state, the foot support 32 is in a position pointing to the ground and is used to support the unfolded box-type folding electric bicycle. When the foot support 32 is rotated to the closed state, the foot support 32 is lifted off the ground and is in a position tilted toward the rear of the vehicle.

[0059] The leg opening mechanism has an elastic toggle arm that blocks the path of the leg 32 in and out of the box body 1. When the rear wheel assembly is linearly extended from the box body 1, the leg 32 in the closed state touches the elastic toggle arm, causing the elastic toggle arm to toggle the leg 32 to rotate to the open state. When the rear wheel assembly is linearly retracted into the box body 1, the leg 32 in the open state touches the elastic toggle arm, causing the elastic toggle arm to toggle the leg 32 to rotate to the closed state. The elastic toggle arm elastically deforms to allow the leg 32 to enter and exit the box body 1.

[0060] The outer edge of the connecting base 46 has a first positioning surface 23 and a second positioning surface 24. A reset slider 35 is mounted on the support leg 32 and is pushed to reset by a reset spring 31. When the reset spring 31 drives the reset slider 35 to press against the first positioning surface 23, the support leg 32 is positioned in an open state. When the reset spring 31 drives the reset slider 35 to press against the second positioning surface 24, the support leg 32 is positioned in a closed state.

[0061] The leg opening mechanism specifically includes a toggle block 52 and a torsion spring 47. The torsion spring 47 is sleeved on the mounting shaft in the box body 1. One torsion arm of the torsion spring 47 serves as an elastic toggle arm. The other button arm of the torsion spring 47 is fixed on the box body 1. The elastic toggle arm has a toggle block 52.

[0062] The outer edge of the connecting base 46 may also have a third positioning surface 25, which is located above the first positioning surface 23 and the second positioning surface 24 of the connecting base 46. When the support leg mechanism is kicked to the third positioning surface 25, the support leg 32 is in a horizontal state.

[0063] The support leg 32 is driven by external force to rotate around the connecting base 46. At the same time, the front end of the reset slider 35 is always pressed against the outer edge of the connecting base 46 under the action of the reset spring 31. The reset slider 35 and the reset spring 31 are both sleeved on the support leg 32. The rear end of the reset slider 35 is the reset spring 31. The support leg 32 also has a protective sleeve 55 sleeved on the outside of the reset spring 31.

[0064] The retractable body also includes a chain pedal mechanism for driving the rear wheel of the rear wheel assembly through a chain 14 and a pedal. The chain pedal mechanism includes a front sprocket 13, a rear flywheel 29, a chain 14 and a pedal. The front sprocket 13 is located in the box 1, and the rear flywheel 29 is installed on the rear wheel to drive the rear wheel 3. The chain 14 is mounted on the front sprocket 13 and the rear flywheel 29. A chain limiter is provided on each of the upper and lower sides of the front sprocket 13 to limit the chain 14 to the front sprocket 13 to prevent the chain 14 from being pulled out of the retractable body. The chain 14 of the rear flywheel 29 is connected to the front chainring 13 so that the chain 14 can be kept in the rear flywheel 29 when the retractable vehicle body is retracted or extended. The chain limiter of the front chainring 13 is located at the entry and exit position of the chain 14 of the front chainring 13. A chain limiter is provided on each side of the upper and lower sides of the rear flywheel 29 for limiting the chain 14 to the rear flywheel 29 to prevent the chain 14 from falling off the rear flywheel 29 when the retractable vehicle body is retracted or extended. The chain limiter of the rear flywheel 29 is located at the entry and exit position of the chain 14 of the rear flywheel 29. The pedal 22 is located outside the box body 1 and is detachably connected to the center axis 12 of the front chainring 13.

[0065] 4. Foldable handlebar mechanism

[0066] The foldable handlebar mechanism is folded by folding forward. The foldable handlebar mechanism includes a U-shaped handlebar support frame 39 and a foldable handle 38. The lower end of the U-shaped handlebar support frame 39 is connected to the front fork 7 through a folding riser. The foldable handle 38 is installed at the upper ends of the two side arms of the U-shaped handlebar support frame 39. The foldable handle 38 is folded downward by its own folding structure and is close to the two side arms of the U-shaped handlebar support frame 39. The gap between the side arms of the U-shaped handlebar support frame 39 is the clearance for the front wheel 2, which is used to allow the front wheel 2 to pass through the U-shaped handlebar support frame 39 after folding.

[0067] The folding standpipe between the U-shaped handlebar support frame 39 and the front fork 7 includes a folding joint 30 and a lock 37. The U-shaped handlebar support frame 39 is folded forward by the folding joint 30. The folded U-shaped handlebar support frame 39 is engaged with the front wheel 2 and can also limit the front wheel 2. The lock 37 is used to lock the folding joint 30 after the U-shaped handlebar support frame 39 is rotated upward and opened to the full position, making the foldable handlebar mechanism a solid whole. The upper ends of the two side arms of the U-shaped handlebar support frame 39 extend outward to install the connecting seat 49. The connecting seat 49 The upper hinged connecting shaft 40 has a sleeve 36 mounted on the connecting shaft 40. The front end of the connecting shaft 40 is sequentially installed with a compression spring 48, a gasket 45 and a handle. The connecting seat 49, the connecting shaft 40, the sleeve 36, the compression spring 48, the gasket 45 and the handle constitute the foldable handle 38 of this embodiment. The compression spring 48 and the gasket 45 are located in the sleeve 36. When the foldable handle 38 needs to be folded, the sleeve 36 is pushed outward to expose the hinge of the connecting seat 49 and the connecting shaft 40, and then the handle is pressed downward to complete the folding of the foldable handle; the handle is bent upward, and the sleeve 36 is sleeved on the hinge of the connecting seat 49 and the connecting shaft 40 under the action of the compression spring 48 to complete the unfolding of the handle. The U-shaped opening of the U-shaped handlebar support frame 39 is also installed with a reinforcing connecting rod 57 connecting the side arms at both ends of the opening, so that the U-shaped handlebar support frame 39 becomes a closed state, thereby improving the strength of the foldable handlebar mechanism.

[0068] The lifting mechanism, retractable body and door panels are all electric. After the electric control parts of the lifting mechanism, retractable body and door panels are connected together, they can be unfolded and folded for storage with one button, which is very convenient to use.

[0069] When used specifically

[0070] Riding and unwinding: Start the riding and unwinding program through the key, mobile phone APP, one-touch start button or other control methods. 1. The electric drive unit of the door panel 28 opens the door panel 28, and the door panel 28 is attached to both sides of the box body 1, revealing the openings on the front and rear sides of the box body 1; 2. The front telescopic motor 11 and the rear telescopic motor 6 rotate synchronously, and the front wheel 2 The foldable bicycle body 1 extends from the front end of the box body 1, and the rear wheel 3 extends from the rear end of the box body 1. After the footrest mechanism touches the footrest opening mechanism, the footrest 32 is switched from a closed state to an open state. After the front wheel 2 and the rear wheel 3 are fully extended, the front telescopic motor 11 and the rear telescopic motor 6 stop rotating; 3. The two electric push rods 17 extend their movable ends at the same time, and the movable ends move the telescopic body downward through the first connecting rod 33 and the second connecting rod 34. After the front wheel 2 and the rear wheel 3 touch the ground, the box body 1 is slowly lifted off the ground; 4. Rotate the foldable handlebar mechanism, lock the lock buckle 37, and finally open the foldable handlebar 38; 5. Install the pedals 22 to both ends of the middle axis 12, and the rider sits on the saddle 26 of the box body 1 and starts riding.

[0071] Folding and storage: 1. The rider kicks the kickstand 32 to the open state, parks the box-type folding electric bicycle through the kickstand 32, and then removes the pedals 22 as needed; 2. Fold the foldable handlebar 38, release the lock 37, flip the foldable handlebar mechanism forward, and buckle the U-shaped handlebar support frame 39 on the front wheel 2; 3. Start the folding and storage program through a key, a mobile phone APP, a one-button start button or other control methods; 4. The two electric push rods 17 retract their active ends at the same time, and the active ends make the box body 1 slowly fall back to the ground through the first connecting rod 33 and the second connecting rod 34. After the box body 1 falls to the ground, the retractable bicycle The body moves upward until the front wheel 2 and the rear wheel 3 leave the ground for a distance; 5. The front telescopic motor 11 and the rear telescopic motor 6 rotate synchronously, the front wheel 2 retracts from the front end of the box body 1, and the rear wheel 3 retracts from the rear end of the box body 1. After the leg mechanism touches the leg opening mechanism, the leg 32 is toggled from the open state to the closed state. After they are fully retracted, the front telescopic motor 11 and the rear telescopic motor 6 stop rotating; 5. The electric drive unit closes the door panel 28 to complete the folding and storage of the box-type foldable electric bicycle. The user can push the box body 1 or carry the box body 1 to enter shopping malls, subway stations, airports, railway stations and the like.

[0072] The above description only describes specific embodiments of the present invention. Various examples do not limit the essential content of the present invention. After reading the description, ordinary technicians in the relevant technical field can make modifications or variations to the specific embodiments described above without departing from the essence and scope of the invention.

Claims

1. A box-type folding electric bicycle, comprising a box body, characterized in that: The box body has openings on the front and rear sides, and a lifting mechanism and a retractable body are provided in the box body. The lifting mechanism connects the box body and the retractable body. The retractable body includes a front wheel assembly and a rear wheel assembly. The front wheel assembly and the rear wheel assembly extend straightly from the openings on the front and rear sides of the box body respectively to be deployed. The lifting mechanism acts on the box body and the retractable body respectively to lift the box body so that the box body is off the ground. The lifting mechanism of the box body includes a lifting drive mechanism and a lifting guide mechanism, and the lifting drive mechanism includes an electric push rod, a first connecting rod and a second connecting rod, the upper end of the first connecting rod is hinged on the box body, the lower end of the first connecting rod is hinged on the upper end of the second connecting rod, and the lower end of the second connecting rod is hinged on the telescopic body, one end of the electric push rod is hinged on the upper end of the first connecting rod, and the other end of the electric push rod is hinged on the telescopic body, a limiting structure is provided between the first connecting rod and the second connecting rod, for limiting the first connecting rod and the second connecting rod after the first connecting rod and the second connecting rod are opened to the dead point, the hinge point of the electric push rod and the first connecting rod and the hinge point of the first connecting rod and the box body are staggered, so that the electric push rod can push the first connecting rod to rotate by extending, so that the first connecting rod and the second connecting rod in the folded state are opened to the dead point; The lifting guide mechanism is used to guide the box to rise and fall relative to the telescopic body.

2. The box-type folding electric bicycle according to claim 1, characterized in that: The rear wheel assembly has a support mechanism, and the box body has a matching support opening mechanism, which is installed on the rear wheel assembly and is used to support the unfolded box-type folding electric bicycle; The support mechanism includes a connecting base and a support leg. The support leg is rotatably mounted on the connecting base. The support leg has an open state and a closed state. When the support leg is rotated to the open state, the support leg is in a position pointing to the ground and is used to support the unfolded box-type folding electric bicycle. When the support leg is rotated to the closed state, the support leg is lifted off the ground and is in a position tilted toward the rear of the bicycle. The leg opening mechanism has an elastic toggle arm that blocks the path of the leg in and out of the box. When the rear wheel assembly is linearly extended from the box, the leg in the closed state touches the elastic toggle arm, causing the elastic toggle arm to toggle the leg to rotate to the open state. When the rear wheel assembly is linearly retracted into the box, the leg in the open state touches the elastic toggle arm, causing the elastic toggle arm to toggle the leg to rotate to the closed state. The elastic toggle arm elastically deforms to allow the leg to enter and exit the box.

3. The box-type folding electric bicycle according to claim 2, characterized in that: The outer edge of the connecting base has a first positioning surface and a second positioning surface. A reset slider is mounted on the support leg and is reset by a reset spring. When the reset spring drives the reset slider to press against the first positioning surface, the support leg is positioned in an open state. When the reset spring drives the reset slider to press against the second positioning surface, the support leg is positioned in a closed state. There is also a limiting structure between the support leg and the connecting base, which is used to limit the support leg from rotating toward the front side of the vehicle when the support leg is in the open state.

4. The box-type folding electric bicycle according to claim 2, characterized in that: The leg opening mechanism includes a toggle block and a torsion spring. The torsion spring is sleeved on the mounting shaft in the box body. One torsion arm of the torsion spring serves as an elastic toggle arm. The other button arm of the torsion spring is fixed on the box body. The elastic toggle arm has a toggle block.

5. The box-type folding electric bicycle according to claim 1, characterized in that: The retractable body also includes a chain pedal mechanism for driving the rear wheel of the rear wheel assembly through a chain and a pedal, the chain pedal mechanism includes a front sprocket, a rear flywheel, a chain and a pedal, the front sprocket is located in the box, the rear flywheel is installed on the rear wheel to drive the rear wheel, the chain is sleeved on the front sprocket and the rear flywheel, a chain limiter is respectively provided on the upper and lower sides of the front sprocket, for limiting the chain to the front sprocket, the chain limiter of the front sprocket is located at the chain entry and exit position of the front sprocket, a chain limiter is respectively provided on the upper and lower sides of the rear flywheel, for limiting the chain to the rear flywheel, the chain limiter of the rear flywheel is located at the chain entry and exit position of the rear flywheel, and the pedal is located outside the box and is detachably connected to the center axis of the front sprocket.

6. The box-type folding electric bicycle according to claim 1, characterized in that: The front wheel assembly includes a foldable handlebar mechanism, a front wheel, a front fork and a front electric telescopic sleeve device, the front wheel is mounted on the front fork, and the front fork is mounted on the front part of the extended section of the front electric telescopic sleeve device; The rear wheel assembly includes a rear wheel, a rear fork and a rear electric telescopic sleeve device. The rear wheel is mounted on the rear fork, and the rear fork is mounted on the rear part of the extended section of the rear electric telescopic sleeve device. Both the front electric telescopic sleeve device and the rear electric telescopic sleeve device include a telescopic sleeve and an electric screw drive mechanism for driving the telescopic sleeve to extend and retract. The screw of the electric screw drive mechanism is located inside the telescopic sleeve. The non-extending sections of the telescopic sleeves of the front electric telescopic sleeve device and the rear electric telescopic sleeve device are assembled together in an upper and lower stack.

7. The box-type folding electric bicycle according to claim 6, characterized in that: The foldable handlebar mechanism is folded by folding forward. The foldable handlebar mechanism includes a U-shaped handlebar support frame, a folding riser and a foldable handle. The lower end of the U-shaped handlebar support frame is connected to the front fork through the folding riser. The foldable handle is installed at the upper ends of the two side arms of the U-shaped handlebar support frame. The foldable handle is folded downward through its own folding structure and is put together with the two side arms of the U-shaped handlebar support frame. The gap between the side arms of the U-shaped handlebar support frame is a clearance for the front wheel, which is used to allow the front wheel to pass through the U-shaped handlebar support frame after the foldable handlebar mechanism is folded.

8. The box-type folding electric bicycle according to claim 1, characterized in that: The lifting guide mechanism is a guide post guide mechanism. There are four guide post guide mechanisms, which are located at the four corners of the box body. The guide post guide mechanism includes a guide post and a guide sleeve sleeved on the guide post. The guide post is fixed on the box body, and the guide sleeve is fixed on the retractable body. There are two sets of lifting drive mechanisms, which are respectively located on the left and right sides of the telescopic vehicle body.

9. The box-type folding electric bicycle according to claim 1, characterized in that: The lifting mechanism is an electric lifting mechanism, and the retractable body is an electric retractable body. The retractable body uses electric means to make the front wheel assembly and the rear wheel assembly extend straightly. Door panels are installed at the openings on both sides of the box body, and electric drive units are installed at the hinges between the door panels and the box body, which drive the door panels to open and close.

10. The box-type folding electric bicycle according to claim 1, characterized in that: The box body includes a box shell and an internal skeleton structure supporting the box shell. The internal skeleton structure includes an upper skeleton, a lower skeleton and four guide pillars. The upper skeleton and the lower skeleton are connected by four guide pillars. The four guide pillars are located at the four corners of the box body; each of the four guide pillars is equipped with a guide sleeve, which is fixed on the retractable body.

11. The box-type folding electric bicycle according to claim 1, characterized in that: The bottom of the box is equipped with rollers, and the top of the box is equipped with a saddle.

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