Freight electric bicycle

Abstract

The invention discloses a freight electric bicycle which comprises a bicycle body, a wheel assembly, a transmission assembly, a first driving device, a cargo bucket and a power generation device. The wheel assembly is arranged below the vehicle body and is driven by the transmission assembly; the first driving device is connected with the transmission assembly so as to drive the transmission assembly to move, and the cargo bucket is arranged in front of the top of the vehicle body; the power generation device comprises a solar panel arranged at the top of the cargo bucket and is used for supplying power to external electric equipment and the first driving device; and the solar panel also rotates or ascends and descends relative to the goods bucket. The solar panel at the top of the cargo bucket can convert solar energy into electric energy to supply power to external electric equipment and the first driving device, self-sufficiency of clean energy is achieved, and dependence on a traditional power grid is reduced.

Description

Technical Field

[0001] The present invention relates to the field of vehicles, and in particular to an electric freight bicycle. Background Art Most electric tricycles currently on the market are simply powered bicycles with cargo frames added. Due to structural limitations, their batteries are generally small. This results in short range, making it difficult to meet the demands of long-distance and long-duration freight transport, leading to range anxiety for operators. Furthermore, existing products are limited in functionality and lack intelligent features, making them difficult to meet the diverse needs of urban logistics, community delivery, and personal cargo transportation. Furthermore, they are unable to adapt to the expanded application scenarios of electronic devices such as external in-car refrigerators, DC projectors, and DC speakers. Summary of the Invention

[0002] The purpose of the present invention is to provide a freight electric bicycle that can achieve self-sufficiency in clean energy and reduce dependence on traditional power grids.

[0003] The embodiment of the present invention is achieved as follows: An embodiment of the present application discloses a freight electric bicycle, comprising: a vehicle body, a wheel assembly, a transmission assembly, a first drive device, a cargo box and a power generation device; the wheel assembly is arranged below the vehicle body and is driven by the transmission assembly; the first drive device is connected to the transmission assembly to drive the transmission assembly to move, and the cargo box is arranged in front of the top of the vehicle body; the power generation device includes a solar panel arranged on the top of the cargo box, which is used to supply power to external electrical equipment and the first drive device; wherein, the solar panel can also rotate or rise and fall relative to the cargo box.

[0004] In a possible embodiment, a first connecting frame and a second connecting frame are respectively provided on both sides of the top of the cargo box; the top of the first connecting frame is rotatably connected to one side of the solar panel, and the top of the second connecting frame is openably connected to the other side of the solar panel; wherein, when the connection relationship between the second connecting frame and the solar panel is released, the solar panel can rotate around the first connecting frame. In a possible embodiment, the second connecting frame is provided with an opening and closing structure to achieve connection or release of the connection relationship between the second connecting frame and the solar panel; wherein the opening and closing structure includes but is not limited to: a snap connection structure, a magnetic connection structure, and a locking tongue connection structure. In a possible embodiment, the solar panel is raised and lowered manually, and lifting holes are provided on both sides of the top of the cargo box. The bottoms of the first connecting frame and the second connecting frame are located in the corresponding lifting holes, and the lifting holes are provided with scales matching different lifting heights. In a possible embodiment, the solar panels are raised and lowered electrically, and a second drive device is provided inside the cargo box, which can drive the first connecting frame and the second connecting frame to rise and fall; wherein the second drive device is a matching drive motor, gear, rack, or cylinder. In a possible embodiment, the power generation device also includes an inverter and a battery pack, and the inverter and the battery pack are located at the bottom of the partition inside the cargo box. The battery pack is electrically connected to the solar panel and the inverter respectively, and the inverter is used to supply power to external electrical equipment and the first drive device.

[0005] In a possible embodiment, the vehicle body is further provided with a power-assisting pedal and a display, and the power-assisting pedal is connected to the transmission assembly; a speed sensor is provided on the front wheel and / or the rear wheel of the wheel assembly for collecting the speed of the wheel; and the display is used to display a matching reference cadence based on the collected speed.

[0006] In a possible embodiment, the wheel assembly includes front wheels and rear wheels, the number of the front wheels is at least two and they are arranged side by side through a connecting shaft, the rear wheels are connected to the connecting shaft through the transmission assembly, and the cargo box is located above the connecting shaft.

[0007] In a possible embodiment, the transmission assembly is a belt drive or a sprocket drive; in the case of a belt drive, it includes a front pulley, a rear pulley and a belt, the front pulley is arranged on the connecting shaft, the rear pulley is arranged on the rear wheel, and the front pulley and the rear pulley are connected through the belt drive; in the case of a sprocket drive, it includes a front sprocket, a rear sprocket and a chain, the front sprocket is arranged on the connecting shaft, the rear sprocket is arranged on the rear wheel, and the front sprocket and the rear sprocket are connected through the chain drive; wherein, the front sprocket and / or the rear sprocket are multi-speed change wheels.

[0008] In a possible implementation manner, a handlebar and a seat are provided on the top of the vehicle body, and a brake system is provided on the handlebar for connecting with the front wheel and / or the rear wheel.

[0009] The beneficial effects of the embodiments of the present invention are: The solar panels on top of the cargo bed convert solar energy into electricity, powering external electrical devices and the first drive unit, achieving self-sufficiency in clean energy and reducing dependence on the traditional power grid. The solar panels can be rotated or raised relative to the cargo bed and adjusted to the optimal angle according to the position of the sun to maximize sunlight reception, thereby improving energy conversion efficiency. Furthermore, the battery can be continuously charged while riding. This solution, through the use of rotatable or raiseable solar panels, may achieve similar or even better battery life improvements. Furthermore, the cargo bed is located in front of the top of the vehicle body, making it more suitable for small tricycles. By adopting a front-mounted cargo bed layout, the center of gravity of the vehicle is shifted to the front, effectively preventing the vehicle from tipping over when turning. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 This is an overall structural diagram of an electric freight bicycle according to an embodiment of the present invention; Figure 2 This is a partial structural diagram of an electric freight bicycle according to an embodiment of the present invention; Figure 3 A diagram of a power supply system for an electric freight bicycle according to an embodiment of the present invention; Figure 4 It is an assembly diagram of the opening and closing structure and the first frame of the present invention; Figure 5 This is an overall structural diagram of an embodiment of the openable and closable structure of the present invention; Figure 6 This is a diagram of the internal structure of an embodiment of the openable and closable structure of the present invention; Figure 7 This is an embodiment of the present invention for realizing the rotation of the solar panel; Figure 8 is a plan view of the first connecting frame and the solar panel in the present invention; Figure 9 for Figure 8 Cross-section along the mid-DD direction; Figure 10 for Figure 9 Enlarged view of point B in the middle.

[0012] Icons: 1. Vehicle body; 2. Front wheel; 3. Rear wheel; 4. Cargo box; 5. Solar panel; 6. First connecting frame; 61. Mounting hole; 7. Second connecting frame; 8. Inverter; 9. Battery pack; 10. Handlebar; 11. Seat; 121. Lock; 130. Locking assembly; 131. First fastener; 1311. Lock tongue; 1312. First notch; 300. Articulated mounting assembly; 330. Drive unit; 310. Articulated rod; 211. Articulated hole. DETAILED DESCRIPTION

[0013] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0016] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0017] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0018] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0019] refer to Figures 1 to 3 A freight electric bicycle according to an embodiment of the present application includes: a body 1, a wheel assembly, a transmission assembly, a first drive device, a cargo box 4 and a power generation device; the wheel assembly is arranged below the body 1 and is driven by the transmission assembly; the first drive device is connected to the transmission assembly to drive the transmission assembly to move, and the cargo box 4 is arranged in front of the top of the body 1; the power generation device includes a solar panel 5 arranged on the top of the cargo box 4, which is used to supply power to external electrical equipment and the first drive device; wherein, the solar panel 5 can also rotate or rise and fall relative to the cargo box 4.

[0020] In this embodiment, the solar panel 5 on top of the cargo bed 4 converts solar energy into electricity to power external electrical devices and the first drive unit, achieving clean energy self-sufficiency and reducing reliance on the traditional power grid. The solar panel 5 can be rotated or raised relative to the cargo bed 4, adjusting to the optimal angle based on the sun's position to maximize sunlight reception and improve energy conversion efficiency. Furthermore, the battery can be continuously charged while riding. This solution, through the rotatable or raiseable solar panel 5, may achieve similar or even better battery life improvements. Furthermore, the cargo bed 4 is positioned forward of the top of the vehicle body 1, making it particularly suitable for small tricycles. This forward placement of the cargo bed 4 shifts the vehicle's center of gravity to the front, effectively preventing the vehicle from tipping over when turning. Adjustable driving lights are also located on both sides of the front of the cargo bed 4, powered by solar energy. Underneath the lights, crash pads are positioned to absorb and cushion vibrations generated during driving.

[0021] Furthermore, the rooftop solar photovoltaic panels collect solar energy and input it unidirectionally into the charging and discharging ports. These ports provide bidirectional input and output with the vehicle controller. The ports default to input mode and automatically enter charging mode when connected to a charger. Furthermore, various transmission methods, not limited to 4G cards and Bluetooth, enable wireless short-range or remote connection between the mobile app and the vehicle system. The charging and discharging ports can also be set to discharge mode. Different electrical circuits can be configured to discharge mode within the mobile app to facilitate charging external electronic devices such as refrigerators, mobile phones, tablets, DC projectors, e-bikes, and e-cargo vehicles. To accommodate different voltage levels for electrical devices, such as 12V, 24V, and 36V, different electrical circuits can be configured to corresponding voltage levels within the mobile app. The charging and discharging ports provide bidirectional input and output with the vehicle controller, and different input and output states and output voltage levels can be configured within the mobile app. The vehicle controller also provides bidirectional input and output with the energy storage battery, and different input and output states and output voltage levels can be configured within the mobile app.

[0022] Furthermore, electrical equipment includes but is not limited to mobile phones, tablets, car refrigerators, DC speakers, DC projectors, etc.

[0023] In some embodiments, a first connecting frame 6 and a second connecting frame 7 are respectively provided on both sides of the top of the cargo box 4; the top of the first connecting frame 6 is rotatably connected to one side of the solar panel 5, and the top of the second connecting frame 7 is openably connected to the other side of the solar panel 5; wherein, when the connection relationship between the second connecting frame 7 and the solar panel 5 is released, the solar panel 5 can rotate around the first connecting frame 6.

[0024] In this embodiment, a first connecting frame 6 and a second connecting frame 7 are respectively provided on both sides of the top of the cargo box 4, and stable support for the solar panel 5 is achieved by the first connecting frame 6 and the second connecting frame 7. Moreover, the top of the first connecting frame 6 is rotatably connected to one side of the solar panel, such as by means of a rotating shaft or a shaft sleeve. The second connecting frame 7 can be fixed to the other side of the solar panel 5, while also being in contact with the connection relationship with the solar panel 5. When it is not necessary to rotate and adjust the angle of the solar panel 5, the second connecting frame 7 is fixed to the solar panel 5 to prevent the solar panel 5 from shaking. When it is necessary to rotate and adjust the angle of the solar panel 5, the connection between the second connecting frame 7 and the solar panel 5 is released, and the solar panel 5 is manually rotated to rotate it to the appropriate angle. At this time, it is also necessary to raise or lower the second connecting frame 7 to the corresponding height and fix the second connecting frame 7 to the solar panel 5.

[0025] In some embodiments, the second connecting frame 7 is provided with an opening and closing structure to achieve the connection or release of the connection relationship between the second connecting frame 7 and the solar panel 5; wherein the opening and closing structure includes but is not limited to: a snap connection structure, a magnetic connection structure, and a locking tongue connection structure.

[0026] As a preferred embodiment, the specific structure of the opening and closing structure is as follows, Figures 4 to 6 , including a first latch 131 and a second latch 132, the first latch 131 is provided with a locking tongue 1311 and a first notch 1312, the locking tongue 1311 is engaged with or separated from the lock 121, so that the solar panel 5 and the second connecting frame 7 can be detachably connected, the cargo box 4 is locked and fixed with the locking assembly 130 through the lock 121, and the lock 121 is released to facilitate the separation of the solar panel 5 and the second connecting frame 7.

[0027] In this embodiment, when the lock tongue 1311 is engaged with the lock buckle 121, the first latch 131 is in contact with the second latch 132, the lock buckle 121 is inserted into the first notch 1312, and the second latch 132 is close to the first notch 1312. The lock tongue 1311 and the second latch 132 jointly limit the lock buckle 121. When the lock buckle 121 and the locking assembly 130 are connected, the lock buckle 121 can be inserted into the lock tongue 1311 of the first latch 131 from the first notch 1312. The position of the second latch 132 close to the first notch 1312 prevents the lock buckle 121 from falling out of the first notch 1312. When locked, the lock tongue 1311 and the second latch 132 jointly limit the lock buckle 121 to ensure the stability of the connection between the lock tongue 1311 and the lock buckle 121.

[0028] As a preferred embodiment, refer to Figures 7 to 10 The rotation of the solar panel 5 (including the surrounding frames and the photovoltaic panel located within the frame) can be achieved in the following manner: a hinged mounting assembly 300 is provided on one side of the frame of the solar panel 5, and the hinged mounting assembly 300 includes a driving unit 330 and a hinged rod 310. The hinged rod 310 is telescopically mounted in the mounting hole 61 of the first connecting frame 6. The driving unit 330 drives one end of the hinged rod 310 to extend out of the mounting hole 61 and extend into the hinged hole 211 of the frame of the solar panel 5, so that the frame of the solar panel 5 is hingedly mounted on the hinged rod 310. When the hinged rod 310 retracts into the mounting hole 131, one side of the solar panel 5 is released from the hinged rod 310. After the hinge is released, the solar panel 5 can be flipped relative to the first connecting frame 6.

[0029] In some embodiments, the solar panel 5 is raised and lowered manually, and lifting holes are provided on both sides of the top of the cargo box 4. The bottoms of the first connecting frame 6 and the second connecting frame 7 are located in the corresponding lifting holes, and the lifting holes are provided with scales matching different lifting heights.

[0030] In this embodiment, the first connecting frame 6 and the second connecting frame 7 can be U-shaped or gate-shaped frames. The corresponding lifting holes for the U-shaped frame are slotted, long holes that can accommodate the bottom of the frame. The corresponding lifting holes for the gate-shaped frame are deep holes, with both ends of the frame bottom extending into the lifting holes. The lifting holes are provided with scales, each of which can accommodate a horizontal latch. Once the first connecting frame 6 and the second connecting frame 7 are adjusted to the appropriate position, the latches can secure them at that height.

[0031] In some embodiments, the solar panel 5 is electrically raised and lowered, and a second drive device is provided within the cargo box 4. The second drive device can drive the first and second connecting frames 6 and 7 to rise and fall. The second drive device comprises a coordinated drive motor, gear, and rack. The drive motor is connected to the rack through a gear transmission. The rack is vertically arranged and connected to the corresponding first and second connecting frames 6 and 7. The rotation of the drive motor can achieve the raising and lowering of the rack and the corresponding first and second connecting frames 6 and 7. Alternatively, the second drive device is a cylinder that can be extended and retracted up and down, and the extension and retraction of the cylinder can achieve the raising and lowering of the corresponding first and second connecting frames 6 and 7. In some embodiments, the power generation device also includes an inverter 8 and a battery pack 9, which are located at the bottom of the partition inside the cargo box 4. The battery pack 9 is electrically connected to the solar panel 5 and the inverter 8 respectively. The inverter 8 is used to supply power to external electrical equipment and the first drive device.

[0032] In this embodiment, some external electrical devices use AC power, while the solar panels 5 and battery pack 9 output DC power. The DC power is converted to AC power by the inverter 8 for use by the AC devices. A partition within the cargo bed 4 is located above the battery pack 9 and inverter 8, shielding the electrically charged devices and facilitating the loading of goods or passengers within the cargo bed 4.

[0033] In this embodiment, the vehicle body 1 is further provided with a power-assisting pedal and a display, and the power-assisting pedal is connected to the transmission assembly; a speed sensor is provided on the front wheel 2 and / or the rear wheel 3 of the wheel assembly for collecting the speed of the wheel; the display is used to display a matching reference cadence based on the collected speed.

[0034] In this embodiment, the wheel assembly includes front wheels and rear wheels, the number of the front wheels is at least two and they are arranged side by side through a connecting shaft, the rear wheels are connected to the connecting shaft through the transmission assembly, and the cargo box 4 is located above the connecting shaft.

[0035] In this embodiment, the transmission assembly is a belt drive or a sprocket drive; in the case of a belt drive, it includes a front pulley, a rear pulley and a belt, the front pulley is arranged on the connecting shaft, the rear pulley is arranged on the rear wheel, and the front pulley and the rear pulley are connected through the belt drive; in the case of a sprocket drive, it includes a front sprocket, a rear sprocket and a chain, the front sprocket is arranged on the connecting shaft, the rear sprocket is arranged on the rear wheel, and the front sprocket and the rear sprocket are connected through the chain drive; wherein, the front sprocket and / or the rear sprocket are multi-speed change wheels.

[0036] In this embodiment, a handlebar 10 and a seat 11 are provided on the top of the vehicle body 1. The handlebar 10 is provided with a brake system for connecting with the front wheel and / or the rear wheel.

[0037] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A freight electric bicycle, characterized in that: include: A vehicle body, a wheel assembly, a transmission assembly, a first drive device, a cargo box and a power generation device; the wheel assembly is arranged below the vehicle body and is driven by the transmission assembly; the first drive device is connected to the transmission assembly to drive the transmission assembly to move, and the cargo box is arranged in front of the top of the vehicle body; the power generation device includes a solar panel arranged on the top of the cargo box, which is used to supply power to external electrical equipment and the first drive device; wherein, the solar panel can also rotate or rise and fall relative to the cargo box.

2. The electric cargo bicycle according to claim 1, characterized in that: A first connecting frame and a second connecting frame are respectively provided on both sides of the top of the cargo box; the top of the first connecting frame is rotatably connected to one side of the solar panel, and the top of the second connecting frame is openably connected to the other side of the solar panel; wherein, when the connection relationship between the second connecting frame and the solar panel is released, the solar panel can rotate around the first connecting frame.

3. The electric cargo bicycle according to claim 2, characterized in that: The second connecting frame is provided with an opening and closing structure to realize the connection or release of the connection relationship between the second connecting frame and the solar panel; wherein the opening and closing structure includes but is not limited to: a snap connection structure, a magnetic connection structure, and a locking tongue connection structure.

4. The electric cargo bicycle according to claim 1, characterized in that: The solar panel is raised and lowered manually. Lifting holes are provided on both sides of the top of the cargo box. The bottoms of the first connecting frame and the second connecting frame are located in the corresponding lifting holes. The lifting holes are provided with scales matching different lifting heights.

5. The electric cargo bicycle according to claim 3, characterized in that: The solar panels are raised and lowered electrically, and a second drive device is provided inside the cargo box, which can drive the first connecting frame and the second connecting frame to rise and fall; wherein, the second drive device is a matching drive motor, gear, rack, or cylinder.

6. The electric cargo bicycle according to claim 1, characterized in that: The power generation device also includes an inverter and a battery pack. The inverter and the battery pack are located at the bottom of the partition inside the cargo box. The battery pack is electrically connected to the solar panel and the inverter respectively. The inverter is used to supply power to external electrical equipment and the first drive device.

7. The electric cargo bicycle according to claim 1, characterized in that: The vehicle body is further provided with a power-assisting pedal and a display, and the power-assisting pedal is connected to the transmission assembly; a speed sensor is provided on the front wheel and / or the rear wheel of the wheel assembly for collecting the speed of the wheel; The display is used to display the matching reference cadence according to the collected rotation speed.

8. The electric cargo bicycle according to claim 1, characterized in that: The wheel assembly includes front wheels and rear wheels, the number of the front wheels is at least two and they are arranged side by side through a connecting shaft, the rear wheels are connected to the connecting shaft through the transmission assembly, and the cargo box is located above the connecting shaft.

9. The electric cargo bicycle according to claim 8, characterized in that: The transmission assembly is belt driven or sprocket driven; in the case of belt driven, it includes a front pulley, a rear pulley and a belt, the front pulley is arranged on the connecting shaft, the rear pulley is arranged on the rear wheel, and the front pulley and the rear pulley are connected through the belt drive; in the case of sprocket driven, it includes a front sprocket, a rear sprocket and a chain, the front sprocket is arranged on the connecting shaft, the rear sprocket is arranged on the rear wheel, and the front sprocket and the rear sprocket are connected through the chain drive; wherein, the front sprocket and / or the rear sprocket are multi-stage speed change wheels.

10. The electric cargo bicycle according to claim 8, characterized in that: A handlebar and a seat are provided on the top of the bicycle body. A brake system is provided on the handlebar for connecting with the front wheel and / or the rear wheel.

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