A frame for an electric bicycle

Abstract

The present invention discloses a frame for an electric bicycle, which can reduce the overall weight while increasing the strength of the frame. It includes a frame vertical pipe and a bottom bracket. On both sides of the frame vertical pipe, a left main beam and a right main beam are symmetrically welded. The frame vertical pipe is located at the front ends of the left main beam and the right main beam. The tail ends of the left main beam and the right main beam extend obliquely downward. The frame vertical pipe, the left main beam and the right main beam form a main support structure. On both sides of the bottom bracket, a left auxiliary beam and a right auxiliary beam are symmetrically welded. The bottom bracket is located at the front ends of the left auxiliary beam and the right auxiliary beam. The tail ends of the left auxiliary beam and the right auxiliary beam extend obliquely upward. The bottom bracket, the left auxiliary beam and the right auxiliary beam form a secondary support structure. The left auxiliary beam and the right auxiliary beam are welded and fixed between the left main beam and the right main beam to form an X shape. A section extending backward is provided at the tail ends of the left auxiliary beam and the right auxiliary beam, and a bracket is welded thereon. A seat cushion bracket is welded on the bracket.

Description

Technical Field

[0001] The present invention relates to the technical field of electric bicycles, and particularly to a frame for an electric bicycle. Background Art

[0002] Currently, in the electric bicycle industry, lightweight design has become a hot topic of research. For electric bicycles, lightweighting is of greater significance and higher requirements. Aluminum alloy has become one of the most popular materials that can solve the lightweight problem. However, for the frames currently made of aluminum alloy, although aluminum alloy is used instead of alloy steel to reduce the weight of the frame, due to structural problems, the strength of the frame still needs to be improved. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a frame for an electric bicycle that can reduce the overall weight while increasing the strength of the frame.

[0004] The purpose of the present invention is achieved as follows:

[0005] A frame for an electric bicycle includes a frame vertical pipe and a bottom bracket. On both sides of the frame vertical pipe, a left main beam and a right main beam are symmetrically welded. The frame vertical pipe is located at the front end of the left main beam and the right main beam. The tail ends of the left main beam and the right main beam extend obliquely downward. The frame vertical pipe, the left main beam, and the right main beam form a main support structure. On both sides of the bottom bracket, a left sub-beam and a right sub-beam are symmetrically welded. The bottom bracket is located at the front end of the left sub-beam and the right sub-beam. The tail ends of the left sub-beam and the right sub-beam extend obliquely upward. The bottom bracket, the left sub-beam, and the right sub-beam form a sub-support structure. The left sub-beam and the right sub-beam are welded and fixed between the left main beam and the right main beam to form an X shape;

[0006] At the tail ends of the left sub-beam and the right sub-beam, there is a section extending backward. On the section where the left sub-beam and the right sub-beam extend backward, a bracket is welded. A seat bracket is welded on the bracket. The seat bracket is used to connect and fix the seat. The bracket is used to support the seat. The tail ends of the left main beam and the right main beam are used to install the rear wheel and the hub motor.

[0007] Preferably, a storage box board and a storage box mounting board are successively welded between the left main beam and the right main beam from front to back. The storage box board and the storage box mounting board are both located in front of the left sub-beam and the right sub-beam and at the upper ends of the left main beam and the right main beam. The storage box board and the storage box mounting board are used to install the storage box.

[0008] Preferably, a battery front mounting board and a battery rear mounting board are provided between the left main beam and the right main beam. The battery front mounting board is welded to the lower part of the front ends of the left main beam and the right main beam. The battery rear mounting board is welded between the left sub-beam and the right sub-beam. The battery front mounting board and the battery rear mounting board are used to install the battery.

[0009] Preferably, both the left main beam and the right main beam are made of aluminum alloy profiles. At the tails of the left main beam and the right main beam, a left tail reinforcement block and a right tail reinforcement block are embedded and welded in place to increase the structural strength of the tails of the left main beam and the right main beam.

[0010] Preferably, at one end of the extended part of the left auxiliary beam and the right auxiliary beam towards the rear, a taillight mounting plate is fixed, and the taillight mounting plate is used for mounting the taillight.

[0011] Preferably, rear mudguard supports are respectively arranged on the inner sides of the rear ends of the left main beam and the right main beam, and the rear mudguard supports are used for mounting the rear mudguard.

[0012] Preferably, a controller mounting plate is fixed on the inner side of the extended part of the left auxiliary beam and the right auxiliary beam towards the rear, and the controller mounting plate is used for mounting the vehicle controller.

[0013] Preferably, a disc brake mounting plate is welded and fixed at the tail end of the left main beam / right main beam, and the disc brake mounting plate is used for mounting the rear brake.

[0014] Preferably, wire grooves are respectively arranged on the inner sides of the left main beam and the right main beam, and the wire grooves are used for hiding and fixing the wire harness.

[0015] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0016] 1. The main and auxiliary beams of this vehicle frame adopt an aluminum alloy profile structure design, and a reinforcement block is designed inside the tail of the vehicle frame for assembling the motor, which has the advantages of high structural strength, stability, and light weight;

[0017] 2. The structure design of this vehicle frame is simple. The supporting body is the main support structure and the auxiliary support structure, and the main support structure and the auxiliary support structure are welded together. There are fewer welding points during assembly welding, which has the advantage of lower cost;

[0018] 3. The main beam of this vehicle frame adopts a unique profile design with a wire groove. The electrical wire harness can pass through it, which plays a role in fixing the wire harness and at the same time has the advantage of hiding the wire harness;

[0019] Based on the above three points, the core competitiveness of the vehicle in the market is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention.

[0021] REFERENCE SIGNS

[0022] In the attached drawings, 1 is the frame vertical pipe; 2 is the storage box plate; 3 is the front battery mounting plate; 4 is the right main beam; 5 is the bracket; 6 is the seat cushion bracket; 7 is the controller mounting plate; 8 is the tail light mounting plate; 9 is the rear mudguard support; 10 is the right rear strengthening block; 11 is the left rear strengthening block; 12 is the disc brake mounting plate; 13 is the bottom bracket; 14 is the right auxiliary beam; 15 is the rear battery mounting plate; 16 is the left auxiliary beam; 17 is the left main beam; 18 is the storage box mounting plate; A is the wire groove; B-B is the frame main beam profile structure Detailed implementation manners

[0023] As Figure 1 shown, the frame is composed of 18 parts including the frame vertical pipe 1, the storage box plate 2, the front battery mounting plate 3, the right main beam 4, the bracket 5, the seat cushion bracket 6, the controller mounting plate 7, the tail light mounting plate 8, the rear mudguard support 9, the right rear strengthening block 10, the left rear strengthening block 11, the disc brake mounting plate 12, the bottom bracket 13, the right auxiliary beam 14, the rear battery mounting plate 15, the left auxiliary beam 16, the left main beam 17, and the storage box mounting plate 18.

[0024] Specific combination relationship:

[0025] As Figure 1 shown, the right main beam 4 and the left main beam 17 are connected by the frame vertical pipe 1, the right auxiliary beam 14 and the left auxiliary beam 16 are connected by the bottom bracket 13 and the bracket 5, and then connected to the right main beam 4 and the left main beam 17. The storage box plate 2, the rear mudguard support 9, the disc brake mounting plate 12, and the storage box mounting plate 18 are welded on the right main beam 4 and the left main beam 17. The right rear strengthening block 10 and the left rear strengthening block 11 are respectively inserted into the right main beam 4 and the left main beam 17 and then welded. The seat cushion bracket 6, the controller mounting plate 7, and the tail light mounting plate 8 are welded on the right auxiliary beam 14 and the left auxiliary beam 16.

[0026] Specific functions:

[0027] The frame vertical pipe 1 is used for front fork assembly; the storage box plate 2 and the storage box mounting plate 18 are used for storage box assembly; the front battery mounting plate 3 and the rear battery mounting plate 15 are used for battery assembly; the right main beam 4 and the left main beam 17 are used for hub motor assembly, the bracket 5, the seat cushion bracket 6, the right auxiliary beam 14, and the left auxiliary beam 16 are used for seat cushion assembly; the tail light mounting plate 8 is used for tail light assembly; the rear mudguard support 9 is used for rear mudguard assembly; the right rear strengthening block 10 and the left rear strengthening block 11 inserted into the right main beam 4 and the left main beam 17 play a strengthening role; the disc brake mounting plate 12 is used for rear brake assembly; the bottom bracket 13 is used for footrest assembly; Structure A is the wire groove on the frame, used for hiding and fixing the wire harness; Structure B-B is the cross-section of the frame main beam, designed with profiles, which can reduce weight and has high strength.

[0028] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A frame for an electric bicycle, comprising a frame vertical pipe (1) and a bottom bracket (13), characterized in that: On both sides of the frame vertical pipe (1), the left main beam (17) and the right main beam (4) are symmetrically welded. The frame vertical pipe (1) is located at the front ends of the left main beam (17) and the right main beam (4). The tail ends of the left main beam (17) and the right main beam (4) extend obliquely downward. The frame vertical pipe (1), the left main beam (17), and the right main beam (4) form the main support structure. On both sides of the bottom bracket (13), the left auxiliary beam (16) and the right auxiliary beam (14) are symmetrically welded. The bottom bracket (13) is located at the front ends of the left auxiliary beam (16) and the right auxiliary beam (14). The tail ends of the left auxiliary beam (16) and the right auxiliary beam (14) extend obliquely upward. The bottom bracket (13), the left auxiliary beam (16), and the right auxiliary beam (14) form the auxiliary support structure. The left auxiliary beam (16) and the right auxiliary beam (14) are welded and fixed between the left main beam (17) and the right main beam (4) to form an X shape; The tail ends of the left auxiliary beam (16) and the right auxiliary beam (14) are provided with a section extending backward. A bracket (5) is welded on the section where the left auxiliary beam (16) and the right auxiliary beam (14) extend backward. A seat cushion bracket (6) is welded on the bracket (5). The seat cushion bracket (6) is used to connect and fix the seat cushion. The bracket (5) is used to support the seat cushion. The tail ends of the left main beam (17) and the right main beam (4) are used to install the rear wheel and the hub motor; Between the left main beam (17) and the right main beam (4), there are a battery front mounting plate (3) and a battery rear mounting plate (15). The battery front mounting plate (3) is welded to the lower part of the front ends of the left main beam (17) and the right main beam (4). The battery rear mounting plate (15) is welded between the left auxiliary beam (16) and the right auxiliary beam (14). The battery front mounting plate (3) and the battery rear mounting plate (15) are used to install the battery; On the inner sides of the sections where the left auxiliary beam (16) and the right auxiliary beam (14) extend backward, a controller mounting plate (7) is fixed. The controller mounting plate (7) is used to install the vehicle controller.

2. The frame for an electric bicycle according to claim 1, characterized in that: Between the left main beam (17) and the right main beam (4), a storage box plate (2) and a storage box mounting plate (18) are successively welded from front to back. Both the storage box plate (2) and the storage box mounting plate (18) are located in front of the left auxiliary beam (16) and the right auxiliary beam (14), and at the upper ends of the left main beam (17) and the right main beam (4). The storage box plate (2) and the storage box mounting plate (18) are used to install the storage box.

3. A frame for an electric bicycle according to claim 1, characterized in that: Both the left main beam (17) and the right main beam (4) are made of aluminum alloy profiles. The left tail reinforcement block (11) and the right tail reinforcement block (10) are embedded at the tail ends of the left main beam (17) and the right main beam (4) and are welded and fixed to increase the structural strength of the tail ends of the left main beam (17) and the right main beam (4).

4. A frame for an electric bicycle according to claim 1, wherein: At the ends of the sections where the left auxiliary beam (16) and the right auxiliary beam (14) extend backward, a taillight mounting plate (8) is fixed. The taillight mounting plate (8) is used to install the taillight.

5. A frame for an electric bicycle according to claim 1, characterized in that: On the inner sides of the rear ends of the left main beam (17) and the right main beam (4), rear fender supports (9) are respectively provided. The rear fender supports (9) are used to install the rear fender.

6. The frame for an electric bicycle according to claim 1, wherein: A disc brake mounting plate (12) is fixedly welded to the tail end of the left main beam (17) / right main beam (4), and the disc brake mounting plate (12) is used for mounting the rear brake.

7. The frame for an electric bicycle according to claim 1, wherein: Wire grooves are respectively arranged on the inner sides of the left main beam (17) and the right main beam (4), and the wire grooves are used for hiding and fixing wire harnesses.

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