Lightweight aluminum alloy electric bicycle frame

Abstract

A lightweight aluminum alloy electric bicycle frame comprises a head tube, an upper tube, a lower tube, a seat frame, a mounting seat and a rear fork, one end of the upper tube is connected with the head tube, the other end of the upper tube is connected with the mounting seat, the two ends of the lower tube are connected with the head tube and the mounting seat respectively, and the rear fork is connected with the mounting seat; one end of the seat frame is fixed on the lower pipe, a mounting frame is arranged on the upper pipe, one side of the mounting frame is fixed on the upper pipe, and the other end of the mounting frame is fixed on the two sides of the seat frame; an accommodating groove is formed between the seat frame and the mounting frame, a seat cushion is arranged in the accommodating groove, and the seat cushion is respectively connected with the seat frame and the mounting frame; a containing bin for containing a battery is arranged in the lower pipe, and a battery box fixedly connected with the lower pipe is arranged on the lower pipe. According to the principle, the overall structure of the rear frame is simplified, and meanwhile the overall structural strength of all parts of the frame is guaranteed; due to the design of the double battery cabins, the endurance of the electric bicycle is enhanced, and the use experience of a user is optimized.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycles, and in particular to a lightweight aluminum alloy electric bicycle frame. Background Technology

[0002] With its large population, transportation is a major issue in my country. Bicycles and electric bicycles are gaining popularity due to their convenience, small footprint, and ability to reduce fuel pollution. However, electric bicycles, with their higher average speed compared to regular bicycles, experience greater road bumps and impacts during riding, necessitating a more stable frame. Therefore, increasing the overall strength of the frame has become a pressing issue in electric bicycle design. Summary of the Invention

[0003] The problem this invention aims to solve is to provide a lightweight aluminum alloy electric bicycle frame that simplifies the rear fork structure while ensuring the overall structural strength of the frame.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a lightweight aluminum alloy electric bicycle frame, including a head tube, a top tube, a bottom tube, a seat frame, a mounting base, and a rear fork. One end of the top tube is connected to the head tube, and the other end of the top tube is connected to the mounting base. Both ends of the bottom tube are connected to the head tube and the mounting base, respectively. The rear fork is connected to the mounting base. One end of the seat frame is fixed to the bottom tube, and a mounting bracket is provided on the top tube. One side of the mounting bracket is fixed to the top tube, and the other end of the mounting bracket is fixed to both sides of the seat frame. A receiving groove is formed between the seat frame and the mounting bracket, and a seat cushion is provided in the receiving groove. The seat cushion is connected to both the seat frame and the mounting bracket. A battery compartment is provided in the bottom tube, and a battery box is fixedly connected to it on the bottom tube. The principle of this utility model is to simplify the overall structure of the rear frame while ensuring the overall structural strength of each part of the frame; the dual battery compartment design also enhances the electric bicycle's range and optimizes the user experience.

[0005] As an improvement, the rear fork includes two rear fork arms, and the rear fork is connected to the mounting base via a connecting seat. The connecting seat includes a connecting block and two connecting rods fixed on the connecting block. The two connecting rods correspond to the two rear fork arms and are welded to them. The mounting base is provided with a first hinge seat, and the connecting block is hinged to the first hinge seat.

[0006] As an improvement, a reinforcing plate is provided at the bottom of the connection between the rear fork arm and the connecting rod, and the reinforcing plate is welded to the rear fork arm and the connecting rod respectively.

[0007] As an improvement, the seat frame is provided with a first mounting rod, the two sides of which are welded to the two sides of the seat frame, and the first mounting rod is provided with a second hinge seat; a second mounting rod is provided between the two rear fork arms, the two ends of which are welded to the connection between the connecting rod and the rear fork arm, and the second mounting rod is provided with a third hinge seat; a shock absorber is provided between the seat frame and the rear fork, and the two ends of the shock absorber are respectively hinged to the second hinge seat and the third hinge seat.

[0008] As an improvement, the upper tube includes a first connecting section, a second connecting section and a third connecting section from front to back. The front end of the first connecting section is welded to the head tube, the second connecting section is parallel to the lower tube, and the rear end of the third connecting section is welded to the mounting base. The first connecting section, the second connecting section and the third connecting section are integrally formed. A first accommodating area is formed between the upper tube and the lower tube, and the battery box is located in the first accommodating area.

[0009] As an improvement, a second receiving area is formed between the mounting bracket and the upper tube, and a kettle is provided in the second receiving area.

[0010] As an improvement, the frame is provided with a reinforcing rod, the two ends of which are welded to both sides of the frame, and the reinforcing rod passes through the upper tube and is welded to the upper tube.

[0011] As an improvement, the seat frame is provided with a first mounting plate, the two sides of the first mounting plate are welded to the two sides of the seat frame, and the first mounting plate is connected to the seat cushion by screws; the mounting frame is provided with a second mounting plate, the two ends of the second mounting plate are respectively welded to the two sides of the mounting frame, and the second mounting plate is connected to the seat cushion by screws.

[0012] The beneficial effects of this utility model are: the overall structure of this utility model has high strength and is lightweight; the overall frame structure is reasonably designed, ensuring structural stability while maximizing storage space; and it has two battery storage locations, which enhances the range of the electric bicycle. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a structural view of the frame.

[0015] Figure 3 This is a structural view of the mounting bracket.

[0016] Figure 4 This is a structural view of the rear fork.

[0017] Figure 5 This is a structural view of the connector and the mounting base.

[0018] Figure 6This is a schematic diagram of the three-dimensional structure of the seat cushion.

[0019] Explanation of the labels in the diagram: 1. Head tube; 2. Upper tube; 3. Lower tube; 31. Battery box; 32. Storage compartment; 4. Mounting base; 41. First hinge base; 42. Connecting base; 421. Connecting block; 422. Connecting rod; 5. Seat frame; 51. First mounting rod; 511. Second hinge base; 52. Reinforcing rod; 53. First mounting plate; 6. Mounting bracket; 61. Second mounting plate; 7. Seat pad; 8. Rear fork; 81. Rear fork arm; 82. Reinforcing plate; 83. Second mounting rod; 831. Third hinge base. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a lightweight aluminum alloy electric bicycle frame includes a head tube 1, a top tube 2, a bottom tube 3, a seat frame 5, a mounting bracket 6, a mounting base 4, and a rear fork 8. One end of the top tube 2 is welded to the head tube 1, and the other end of the top tube 2 is welded to the mounting base 4. One end of the bottom tube 3 is welded to the head tube 1, and the other end of the bottom tube 3 is welded to the mounting base 4. The top tube 2 includes a first connecting section, a second connecting section, and a third connecting section from front to back. The front end of the first connecting section is welded to the mounting base 4, and the third connecting section... The tail end is welded to the mounting base 4. The second connecting section is parallel to the lower tube 3. A first accommodating area is formed between the upper tube 2 and the lower tube 3. A battery box 31 is provided in the first accommodating area. The battery box 31 is fixed to the lower tube 3 by screws. The lower tube 3 also has a battery accommodating compartment 32 inside. By designing two battery storage positions on the frame, the range of the electric bicycle is enhanced. The parallelism between the second connecting section and the lower tube 3 ensures the overall structural aesthetics and maximizes the space of the first accommodating area, making it convenient for users to install and remove batteries.

[0022] like Figure 1 , 2As shown in Figures 3 and 6, the seat frame 5 is a rectangular frame. One end of the seat frame 5 is welded to the lower tube 3. A mounting bracket 6 is provided between the seat frame 5 and the upper tube 2. One end of the mounting bracket 6 is welded to the upper tube 2, and the other end of the mounting bracket 6 is welded to both sides of the seat frame 5. A receiving groove for placing the seat cushion 7 is formed between the mounting bracket 6 and the seat frame 5. The receiving groove is V-shaped to strengthen the fixation of the seat cushion 7. The seat frame 5 is provided with a first mounting piece 53, and the two ends of the first mounting piece 53 are welded to both sides of the seat frame 5. The mounting bracket 6 is provided with a second mounting piece 61, and the two ends of the second mounting piece 61 are welded to both sides of the mounting bracket 6. The seat cushion 7 is connected to the first mounting piece 53 and the second mounting piece 61 by screws, respectively, to ensure that the seat cushion 7 is securely fixed. The seat frame 5 is also provided with a reinforcing rod 52, the two ends of which are welded to the seat frame 5. The reinforcing rod 52 passes through the upper tube 2 and is welded to the upper tube 2 to strengthen the structural strength of the seat frame 5. The mounting bracket 6 and the upper tube 2 form a second storage area for the user to place a water bottle, making it convenient for the user to place items while riding.

[0023] like Figure 1 , 2 As shown in Figures 4 and 5, the rear fork 8 is connected to the mounting base 4 via a connecting seat 42. The connecting seat 42 includes a connecting block 421 and two connecting rods 422 welded to the connecting block 421. The rear fork 8 includes two rear fork arms 81, which correspond to the two connecting rods 422 and are welded to one end of the connecting rods 422. The mounting base 4 is provided with a first hinge seat 41 welded thereto, which is hinged to the connecting block 421. To enhance the structural strength of the rear fork 8 and the connection between the rear fork arms 81 and the connecting seat 42, a reinforcing plate 82 is provided at the bottom of the connection between the connecting rod 422 and the rear fork arms 81. The reinforcing plate 82 is welded to the rear fork arms 81 and the connecting rods 422 respectively. The seat frame 5 is also equipped with a first mounting rod 51, the two ends of which are welded to the seat frame 5. A second hinge seat 511, welded to the first mounting rod 51, is also provided. A second mounting rod 83 is provided between the two rear fork arms 81. The two ends of the second mounting rod 83 are welded to the connection points of the connecting rod 422 and the rear fork arms 81, respectively. A third hinge seat 831, welded to the second mounting rod 83, is provided. A shock absorber is provided between the second hinge seat 511 and the third hinge seat 831, with both ends of the shock absorber hinged to the second hinge seat 511 and the third hinge seat 831, respectively. This reduces the impact on the frame during riding, thereby enhancing the overall load-bearing capacity and impact resistance of the frame, reducing the impact on the user, and optimizing the user experience. The head tube 1, top tube 2, bottom tube 3, rear fork 8, seat frame 5, and mounting bracket 6 are all made of aluminum alloy, reducing the overall weight of the frame while ensuring structural strength.

[0024] The principle of this utility model is as follows: the structure of the rear fork 8 is simplified, thereby reducing the overall weight of the frame. The seat frame 5 is connected to the rear fork 8, the top tube 2 and the bottom tube 3 respectively, ensuring the structural strength of the overall frame. The second connecting section is parallel to the bottom tube 3, which ensures the maximum space of the first storage area, making it convenient for users to install and remove the battery box 31 and the battery in the storage compartment 32 in the first storage area. At the same time, the two battery storage areas also enhance the range of the vehicle.

Claims

1. A lightweight aluminum alloy electric bicycle frame, comprising a head tube, an upper tube, a lower tube, a seat tube, a mounting seat and a rear fork, one end of the upper tube is connected with the head tube, the other end of the upper tube is connected with the mounting seat, two ends of the lower tube are respectively connected with the head tube and the mounting seat, and the rear fork is connected with the mounting seat; characterized in that: One end of the seat frame is fixed on the lower tube, the upper tube is provided with a mounting frame, one side of the mounting frame is fixed on the upper tube, and the other end of the mounting frame is fixed on the two sides of the seat frame; the seat frame and the mounting frame form a containing groove, the containing groove is provided with a seat cushion, and the seat cushion is connected with the seat frame and the mounting frame respectively; the lower tube is provided with a containing bin containing a battery, and the lower tube is provided with a battery box fixedly connected therewith.

2. The lightweight aluminum alloy electric bicycle frame of claim 1, wherein: The rear fork comprises two rear fork arms, the rear fork is connected with the mounting seat through a connecting seat, the connecting seat comprises a connecting block and two connecting rods fixed on the connecting block, and the two connecting rods correspond to the two rear fork arms and are welded therewith; the mounting seat is provided with a first hinged seat, and the connecting block is hinged with the first hinged seat.

3. The lightweight aluminum alloy electric bicycle frame of claim 2, wherein: The bottom of the connecting part of the rear fork arm and the connecting rod is provided with a reinforcing sheet, and the reinforcing sheet is welded with the rear fork arm and the connecting rod respectively.

4. The light-weight aluminum alloy electric bicycle frame of claim 2, wherein: The seat frame is provided with a first mounting rod, the two sides of the first mounting rod are welded with the two sides of the seat frame, and the first mounting rod is provided with a second hinged seat; a second mounting rod is arranged between the two rear fork arms, the two ends of the second mounting rod are welded at the connecting parts of the connecting rods and the rear fork arms, and the second mounting rod is provided with a third hinged seat; a shock absorber is arranged between the seat frame and the rear fork, and the two ends of the shock absorber are hinged with the second hinged seat and the third hinged seat respectively.

5. The light-weight aluminum alloy electric bicycle frame of claim 1, wherein: The upper tube sequentially comprises a first connecting section, a second connecting section and a third connecting section from front to back, the front end of the first connecting section is welded with the head tube, the second connecting section is parallel to the lower tube, the tail end of the third connecting section is welded with the mounting seat, and the first connecting section, the second connecting section and the third connecting section are integrally formed; the first containing area is formed between the upper tube and the lower tube, and the battery box is arranged in the first containing area.

6. The light-weight aluminum alloy electric bicycle frame of claim 1, wherein: The second containing area is formed between the mounting frame and the upper tube, and the kettle is arranged in the second containing area.

7. The light-weight aluminum alloy electric bicycle frame of claim 1, wherein: The seat frame is provided with a reinforcing rod, the two ends of the reinforcing rod are welded on the two sides of the seat frame, and the reinforcing rod penetrates through the upper tube and is welded with the upper tube.

8. The light-weight aluminum alloy electric bicycle frame of claim 1, wherein: The seat frame is provided with a first mounting sheet, the two sides of the first mounting sheet are welded on the two sides of the seat frame, and the first mounting sheet is connected with the seat cushion through screws; the mounting frame is provided with a second mounting sheet, the two ends of the second mounting sheet are welded on the two sides of the mounting frame respectively, and the second mounting sheet is connected with the seat cushion through screws.

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