Frame structure of power-assisted bicycle

Abstract

The invention relates to the technical field of power-assisted bicycles, in particular to a frame structure of a power-assisted bicycle. The invention provides a power-assisted bicycle frame structure carrying a standby battery. A power-assisted bicycle frame structure comprises a bicycle body, the bicycle body is provided with an upper tube and a lower tube, the bicycle body is connected with a seat tube through the upper tube and the lower tube which have the supporting function, a main battery box is located on the lower tube and rotationally connected with the lower tube through a hinge, a main battery is located in the main battery box, and a control motor is fixed in the seat tube. The main battery is electrically connected with the control motor, the auxiliary seat is fixedly connected to the seat tube, and the auxiliary seat is provided with the box cover which is closed through opposite rotation. The auxiliary seat is arranged to place the standby battery, when the power of the main battery box is insufficient, the main battery box can be rotationally opened, a rider can conveniently take the standby battery for replacement, and the problem that the capacity of a traditional power-assisted bicycle is insufficient is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of power-assisted bicycle technology, and more particularly to a power-assisted bicycle frame structure. Background Technology

[0002] An electric-assisted bicycle is a mode of transportation that combines the features of a traditional bicycle and an electric power-assisted device. Its core characteristic is that it can be propelled forward using both pedals and electricity. When the rider pedals, the electric-assisted bicycle automatically senses this and outputs the corresponding electric power to assist riding; when the rider is not pedaling, the electric-assisted bicycle is powered solely by battery power.

[0003] However, existing electric bicycles have limited battery capacity due to their structural design, which directly restricts their range. To address this issue, designing a frame structure that can accommodate a backup battery becomes essential.

[0004] Therefore, the present invention aims to design a bicycle frame structure equipped with a backup battery, so that riders can quickly install or replace the battery when needed without any special tools. Summary of the Invention

[0005] In order to overcome the shortcomings of existing electric bicycles, such as limited battery capacity and short driving range, this invention provides an electric bicycle frame structure equipped with a backup battery.

[0006] A power-assisted bicycle frame structure includes a bicycle body with a top tube and a bottom tube. The bicycle body is connected to the seat tube via the supporting top and bottom tubes. The main battery box is located on the bottom tube and is rotatably connected via a hinge. The main battery is located inside the main battery box. The control motor is fixed inside the seat tube and is electrically connected to the main battery and the control motor. The frame also includes an auxiliary seat, a cover, a spare battery, and a cover opening mechanism. The auxiliary seat is fixed to the seat tube and has a cover that rotates and closes in opposite directions. The spare battery is located inside the auxiliary seat. The cover opening mechanism is connected to the bottom tube, and the cover can be opened by rotating the main battery box.

[0007] Optionally, the opening mechanism includes a sliding frame, a fixed rod, a lifting frame, a first return spring, and a convex shaft. The sliding frame slides horizontally on the side of the control motor, the fixed rod is fixed to the upper tube, the lifting frame slides longitudinally within the fixed rod, and the first return spring connects the lifting frame and the fixed rod. A convex shaft is fixedly connected to the pivot of the cover, and the end of the convex shaft slides to a limit on the upper end of the lifting frame. The sliding frame can contact and push the lifting frame upward to rotate and unfold the main battery box. The main battery box will push the sliding frame horizontally, and the sliding frame will push the lifting frame upward. A transverse groove is provided at the upper end of the lifting frame, and the convex shaft slides to a limit within the groove. When the lifting frame moves upward, the lifting frame pushes the convex shaft to rotate, and then the convex shaft drives the cover to rotate and open.

[0008] Optionally, a diagonal rod a is provided at the end of the sliding frame that contacts the lifting frame, and a diagonal rod b is provided at the lower end of the lifting frame that contacts and cooperates with the diagonal rod a, with the diagonal rod a and the diagonal rod b in frictional contact.

[0009] Optionally, it also includes a fastener, a locking lever, and a second return spring. The fastener is fixed to the main battery box, the locking lever slides horizontally on the side of the control motor, and the second return spring is connected between the locking lever and the control motor. The locking lever limits and fixes the fastener by locking it in place. Therefore, when the rider rotates the main battery box to open it, the locking lever can be used to fix it.

[0010] Optionally, it also includes an air inlet pipe, which is fixed to the side of the lower pipe. The air inlet pipe is a through pipe with the same inclination angle as the lower pipe. The upper end of the air inlet pipe is bent into a horizontal outlet, and the lower end of the air inlet pipe is connected to the outside of the main battery box.

[0011] Optionally, it also includes a sealing bracket, a control bracket, a protrusion, a third return spring, and a limiting plate. The sealing bracket is vertically slidably connected to the lower tube, and a baffle is provided at the lower end of the sealing bracket to seal the upper end of the air inlet pipe. The control bracket is slidably connected to the sealing bracket, and a third return spring is connected between the two. A protrusion is provided at the lower end of the control bracket, and the limiting plate is vertically fixed to the lower tube. A slot is provided on the limiting plate, and the protrusion can be fixed in the slot by snapping. Both the sealing bracket and the control bracket extend out of the upper tube for easy operation by the rider. The rider holds the upper end of the sealing bracket and the control bracket and moves the control bracket horizontally to snap the protrusion into the limiting plate at different heights, thereby adjusting the height of the sealing bracket.

[0012] Optionally, it also includes a storage box located behind the auxiliary seat for storing bicycle repair parts.

[0013] Optionally, it also includes hooks, which are evenly distributed on the sides of the auxiliary seat and can be used to hang goods.

[0014] The beneficial effects of this invention are: an auxiliary seat is provided to hold a spare battery. When the main battery box is not powerful enough, the main battery box can be rotated open. The lever and fastener fix the main battery box by snapping together. The main battery box will push the sliding frame to move horizontally, and then push the lifting frame to move upward. The lifting frame will drive the box cover to open automatically, so that the rider can easily take out the spare battery for replacement, effectively solving the problem of insufficient battery capacity in traditional electric bicycles. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2This is a three-dimensional structural diagram of the bicycle body, main battery box, and control motor of the present invention.

[0017] Figure 3 This is a three-dimensional structural diagram of the auxiliary seat and the lid of the present invention.

[0018] Figure 4 This is a three-dimensional structural diagram of the box lid when it is opened according to the present invention.

[0019] Figure 5 This is a three-dimensional structural diagram of the fastener and clamp rod of the present invention.

[0020] Figure 6 This is a three-dimensional structural diagram of the air inlet duct of the present invention.

[0021] Figure 7 This is an exploded three-dimensional view of the sealing bracket, control bracket, and protrusion of the present invention.

[0022] Figure 8 This is a three-dimensional structural diagram of the storage box and hook of the present invention.

[0023] Explanation of reference numerals in the attached drawings: 1_Bicycle body, 101_Top tube, 102_Down tube, 103_Seat post, 2_Main battery box, 3_Control motor, 4_Auxiliary seat, 401_Box cover, 5_Spare battery, 6_Sliding frame, 7_Fixing rod, 8_Lifting frame, 801_First return spring, 9_Piston shaft, 10_Fastener, 11_Clamping rod, 12_Second return spring, 13_Air inlet pipe, 14_Sealing bracket, 15_Control bracket, 1501_Protrusion, 16_Third return spring, 17_Limiting plate, 18_Storage box, 19_Hook. Detailed Implementation

[0024] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0025] Example: A power-assisted bicycle frame structure, such as Figures 1-4 As shown, the bicycle includes a bicycle body 1, which is equipped with a top tube 101 and a bottom tube 102. The bicycle body 1 is connected to the seat tube 103 via the supporting top tube 101 and bottom tube 102. The main battery box 2 is located in the bottom tube 102 and is rotatably connected by a hinge. The main battery is located inside the main battery box 2. The control motor 3 is fixed inside the seat tube 103 and is electrically connected to the control motor 3. The bicycle also includes an auxiliary seat 4, a cover 401, a spare battery 5, and a cover opening mechanism. The auxiliary seat 4 is fixed to the seat tube 103 and is equipped with a cover 401 that rotates and closes in opposite directions. The spare battery 5 is located inside the auxiliary seat 4. The cover opening mechanism is connected to the bottom tube 102. By rotating the main battery box 2, the cover 401 can be opened through the cover opening mechanism to facilitate battery replacement by the rider.

[0026] like Figure 1 , Figure 3 and Figure 4 As shown, the opening mechanism includes a sliding frame 6, a fixed rod 7, a lifting frame 8, a first return spring 801, and a convex shaft 9. The sliding frame 6 slides horizontally on the side of the control motor 3. The fixed rod 7 is fixedly connected to the upper tube 101. The lifting frame 8 slides longitudinally inside the fixed rod 7. The first return spring 801 connects the lifting frame 8 and the fixed rod 7. A convex shaft 9 is fixedly connected to the pivot of the cover 401. The end of the convex shaft 9 slides on the upper end of the lifting frame 8. An inclined rod a is provided at the end of the sliding frame 6 that contacts the lifting frame 8. An inclined rod a is provided at the lower end of the lifting frame 8 that contacts and cooperates with the inclined rod a. The inclined rod b and the inclined rod a make frictional contact with the inclined rod b. The sliding frame 6 can contact and push the lifting frame 8 upward. When the main battery power is low, the main battery box 2 can be rotated and unfolded. The main battery box 2 will push the sliding frame 6 horizontally. The sliding frame 6 will push the lifting frame 8 to move upward. The upper end of the lifting frame 8 is provided with a transverse sliding groove. The convex shaft 9 is limited and slides in the sliding groove. When the lifting frame 8 moves upward, the lifting frame 8 pushes the convex shaft 9 to rotate. Then the convex shaft 9 drives the box cover 401 to rotate and open. The staff can easily take out the spare battery 5 and replace the main battery box 2.

[0027] like Figure 1 and Figure 5 As shown, it also includes a fastener 10, a lever 11, and a second return spring 12. The fastener 10 is fixed to the main battery box 2. The lever 11 slides horizontally on the side of the control motor 3. The second return spring 12 is connected between the lever 11 and the control motor 3. The lever 11 limits and fixes the fastener 10 by snapping. Therefore, when the rider rotates and opens the main battery box 2, it can be fixed by the lever 11 to prevent the main battery box 2 from resetting, which improves the convenience of battery replacement.

[0028] like Figure 1 and Figure 6 As shown, it also includes an air inlet pipe 13, which is fixed to the side of the lower pipe 102. The air inlet pipe 13 is a through pipe with the same inclination angle as the lower pipe 102. The upper end of the air inlet pipe 13 is bent into a horizontal outlet, and the lower end of the air inlet pipe 13 is connected to the outside of the main battery box 2. When the rider is riding, the wind resistance during the journey can be guided into the air inlet pipe 13 to achieve the effect of heat dissipation of the main battery box 2 and improve the working performance of the main motor.

[0029] like Figure 1 , Figure 6 and Figure 7As shown, it also includes a sealing bracket 14, a control bracket 15, a protrusion 1501, a third return spring 16, and a limiting plate 17. The sealing bracket 14 is vertically slidably connected to the lower pipe 102. A baffle is provided at the lower end of the sealing bracket 14, which can seal the upper end of the air inlet pipe 13. The control bracket 15 is slidably connected to the sealing bracket 14, and the third return spring 16 is connected between the two. A protrusion 1501 is provided at the lower end of the control bracket 15. The limiting plate 17 is vertically fixed to the lower pipe 102. A slot is provided on the limiting plate 17, and the protrusion 1501 can be engaged by the slot. The sealing bracket 14 and the control bracket 15 are fixed in the slot. Both extend from the upper tube 101 for easy operation by the rider. The rider holds the upper end of the sealing bracket 14 and the control bracket 15 and moves the control bracket 15 horizontally to engage the protrusion 1501 with the limiting plate 17 at different heights. This adjusts the height of the sealing bracket 14, which controls whether the air inlet pipe 13 is closed. That is, the air inlet pipe 13 can be opened when riding to dissipate heat from the main battery box 2 in time, and the air inlet pipe 13 can be closed after parking to reduce the intrusion of foreign objects into the air inlet pipe 13.

[0030] like Figure 1 and Figure 8 As shown, it also includes a storage box 18, which is located behind the auxiliary seat 4 and is used to store bicycle repair parts and tools.

[0031] like Figure 1 and Figure 8 As shown, it also includes hooks 19, which are evenly distributed on the sides of the auxiliary seat 4, and can hang goods.

[0032] The working principle of this invention embodiment is as follows: The main battery provides power to the control motor 3 to assist the rider. The spare battery 5 is located in the auxiliary seat 4. When the main battery box 2 is not powerful enough, it can be rotated open. The lever 11 and the fastener 10 are fixed to the main battery box 2 by snapping. The main battery box 2 will push the sliding frame 6 to move horizontally, and then push the lifting frame 8 to move upward. The lifting frame 8 will drive the box cover 401 to open automatically, so that the rider can easily take out the spare battery 5 for replacement. When the rider is riding, the main battery is cooled in time through the air intake pipe 13, which ensures the power conversion efficiency of the main battery. When the rider stops, the air intake pipe 13 can be sealed by the sealing bracket 14 and the control bracket 15 to prevent foreign objects from entering the air intake pipe 13.

[0033] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A power-assisted bicycle frame structure, comprising a bicycle body (1), the bicycle body (1) being provided with a top tube (101) and a bottom tube (102), a main battery box (2) located in the bottom tube (102) and rotatably connected by a hinge, a control motor (3) fixed inside the seat tube (103), and the main battery and the control motor (3) being electrically connected, characterized in that, It also includes an auxiliary seat (4), a cover (401), a spare battery (5) and a cover opening mechanism. The auxiliary seat (4) is fixed to the seat tube (103). The auxiliary seat (4) is equipped with a cover (401) that rotates and closes in opposite directions. The spare battery (5) is located inside the auxiliary seat (4). The cover opening mechanism is connected to the lower tube (102). By rotating the main battery box (2), the cover (401) can be opened through the cover opening mechanism.

2. The electric bicycle frame structure according to claim 1, characterized in that, The opening mechanism includes a sliding frame (6), a fixed rod (7), a lifting frame (8), a first return spring (801), and a cam (9). The sliding frame (6) slides horizontally on the side of the control motor (3), the fixed rod (7) is fixed to the upper tube (101), the lifting frame (8) slides longitudinally inside the fixed rod (7), and the first return spring (801) is connected between the lifting frame (8) and the fixed rod (7). The cam (9) is fixed at the pivot of the cover (401), and the end of the cam (9) slides on the upper end of the lifting frame (8). The sliding frame (6) can contact and push the lifting frame (8) upward.

3. The electric bicycle frame structure according to claim 2, characterized in that, An inclined rod a is provided at the end of the sliding frame (6) that contacts the lifting frame (8), and an inclined rod b is provided at the lower end of the lifting frame (8) that contacts and cooperates with the inclined rod a. The inclined rod a and the inclined rod b are in frictional contact.

4. The electric bicycle frame structure according to claim 3, characterized in that, It also includes a fastener (10), a lever (11), and a second return spring (12). The fastener (10) is fixed to the main battery box (2). The lever (11) slides horizontally on the side of the control motor (3). The second return spring (12) is connected between the lever (11) and the control motor (3). The lever (11) limits and fixes the fastener (10) by snapping.

5. The electric bicycle frame structure according to claim 4, characterized in that, It also includes an air inlet pipe (13), which is fixed to the side of the lower pipe (102). The air inlet pipe (13) is a through pipe with the same inclination angle as the lower pipe (102). The upper end of the air inlet pipe (13) is bent into a horizontal outlet, and the lower end of the air inlet pipe (13) is connected to the outside of the main battery box (2).

6. The electric bicycle frame structure according to claim 5, characterized in that, It also includes a sealing bracket (14), a control bracket (15), a protrusion (1501), a third reset spring (16), and a limiting plate (17). The sealing bracket (14) is vertically slidably connected to the lower pipe (102). A baffle is provided at the lower end of the sealing bracket (14), which can seal the upper end of the air inlet pipe (13). The control bracket (15) is slidably connected to the sealing bracket (14), and a third reset spring (16) is connected between the two. A protrusion (1501) is provided at the lower end of the control bracket (15). The limiting plate (17) is vertically fixed to the lower pipe (102). A slot is provided on the limiting plate (17), and the protrusion (1501) can be fixed in the slot by snap-fit.

7. The electric bicycle frame structure according to claim 6, characterized in that, It also includes a storage box (18), which is located behind the auxiliary seat (4).

8. The electric bicycle frame structure according to claim 7, characterized in that, It also includes hooks (19), which are evenly distributed on the side of the auxiliary seat (4).

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