Electric bicycle frame

Abstract

An electric bicycle frame comprises a front frame body, a rear frame body, a mounting box provided with a five-way pipe and a rear fork, the front frame body comprises a head pipe, side frames arranged in a bilateral symmetry mode and a mounting plate, one end of each side frame is connected with the head pipe, the other end of each side frame is connected with the mounting box, each side frame comprises a first upper pipe, a second upper pipe and a lower pipe, the first upper pipe is in an L shape, and the second upper pipe is in an L shape. One end of the first upper pipe is connected with the head pipe, the other end of the first upper pipe is connected with the mounting box, the second upper pipe is arranged below the first upper pipe, one end of the second upper pipe is connected with the head pipe, the other end of the second upper pipe is connected with the lower end of the first upper pipe, one end of the lower pipe is connected with the second upper pipe, and the other end of the lower pipe is connected with the mounting box; the rear frame comprises an annular base, first supporting rods arranged on the two sides of the lower portion of the annular base and second supporting rods arranged below the first supporting rods. And the overall structural strength of the frame is higher.

Description

Technical Field

[0001] This utility model relates to the field of electric bicycle technology. Background Technology

[0002] As people's living standards gradually improve, electric bicycles have gradually become a major means of transportation for daily travel, bringing great convenience to people's daily travel.

[0003] Existing electric bicycles only have one top tube and one bottom tube, and the overall strength of the frame is insufficient, so its load-bearing capacity and off-road performance cannot meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an electric bicycle frame, thereby solving the technical problems existing in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an electric bicycle frame, including a front frame, a rear frame, a mounting box with a bottom bracket, and a rear fork. The front frame is located on top of the mounting box, and the rear frame is located behind the front frame. The rear fork is hinged to the mounting box via a hinge seat and is located below the rear frame. A shock absorber is provided between the rear frame and the rear fork. The front frame includes a head tube, symmetrically arranged side frames, and a mounting plate. One end of the side frame is connected to the head tube, and the other end is connected to the mounting box. The side frame includes a first top tube, a second top tube, and a bottom tube. The first top tube is L-shaped, with one end connected to the head tube and the other end connected to the mounting box. The second top tube is located below the first top tube, with one end connected to the head tube. The other end of the second upper tube is connected to the lower end of the first upper tube. One end of the lower tube is connected to the second upper tube, and the other end of the lower tube is connected to the mounting box. A front heat dissipation plate is provided between the lower tubes of the two side frames, a rear heat dissipation plate is provided between the first upper tubes of the two side frames, and a crossbeam is provided between the first upper tubes of the two side frames. The two side frames, the front heat dissipation plate, and the rear heat dissipation plate form a battery housing space. The rear frame includes an annular seat, a first support rod located on both sides below the annular seat, and a second support rod located below the first support rod. The front end of the annular seat is located on the crossbeam. One end of the first support rod is connected to the annular seat, and the other end of the first support rod is connected to the first upper tube. One end of the second support rod is connected to the first support rod, and the other end of the second support rod is connected to the first upper tube. A seat cushion is provided on the annular seat, and a mounting crossbeam is provided inside the annular seat. The principle of this utility model is as follows: the front frame includes a first upper tube, a second upper tube, and a lower tube, and the rear frame includes a ring seat, a first support rod, and a second support rod, resulting in higher overall structural strength of the frame; the side frames and the front and rear heat sinks form a battery housing space, and the frame space layout is reasonable. During driving, air can enter the battery housing space through the heat sinks to dissipate heat from the battery box.

[0006] As an improvement, several reinforcing fittings are provided between the first upper pipe and the second upper pipe.

[0007] As an improvement, a first decorative cover is provided between the second upper tube and the lower tube, a second decorative cover is provided between the first upper tube and the second upper tube, a third decorative cover is provided between the first support rod and the second support rod, a fourth decorative cover is provided between the first support rod and the annular seat, and a flip cover for opening the battery accommodating space is provided between the tops of the two side frames, the flip cover being hinged to the annular seat.

[0008] As an improvement, the upper end of the lower tube is connected to the middle position of the second upper tube, the upper end of the front heat sink is bent and extends to the space between the two second lower tubes, and the space between the battery box and the head tube forms a charger accommodating space.

[0009] The beneficial effects of this utility model compared with the prior art are:

[0010] The front frame includes a first upper tube, a second upper tube, and a lower tube, while the rear frame includes a ring seat, a first support rod, and a second support rod, resulting in a higher overall structural strength. The side frames, together with the front and rear heat sinks, form a battery housing space. The frame space layout is reasonable, allowing air to enter the battery housing space through the heat sinks during driving to dissipate heat from the battery box. Attached Figure Description

[0011] Figure 1 This is a 3D view of the vehicle frame.

[0012] Figure 2 This is a side view of the vehicle frame. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] like Figure 1 , 2As shown, an electric bicycle includes a frame, a front wheel, a rear wheel, and a seat, with the rear wheel integrating a motor. The frame includes a front frame 1, a rear frame 2, a mounting box 4 with a bottom bracket, and a rear fork 3. The front frame 1 is located on top of the mounting box 4, the rear frame 2 is located behind the front frame 1, the rear fork 3 is hinged to the mounting box 4 via a hinge joint, the rear fork 3 is located below the rear frame 2, and a shock absorber 5 is provided between the rear frame 2 and the rear fork 3. The front frame 1 includes a head tube 12, side frames 11 symmetrically arranged on the left and right, and a mounting plate 16; one end of the side frame 11 is connected to the head tube 12, and the other end of the side frame 11 is connected to the mounting box 4; the side frame 11 includes a first upper tube 111, a second upper tube 112, and a lower tube 113. The first upper tube 111 is L-shaped, one end of the first upper tube 111 is connected to the head tube 12, and the other end of the first upper tube 111 is connected to the mounting box 4. The second upper tube 112 is located below the first upper tube 111, one end of the second upper tube 112 is connected to the head tube 12, and the other end of the second upper tube 112 is connected to the lower end of the first upper tube 111. One end of the lower tube 113 is connected to the second upper tube 112, and the other end of the lower tube 113 is connected to the mounting box 4. Several reinforcing tubes 114 are provided between the first upper tube 111 and the second upper tube 112; the lower ends of the side frames 11... A front heat sink 13 is provided between the tubes 113, a rear heat sink 14 is provided between the first upper tubes 111 of the two side frames 11, and a crossbeam 15 is provided between the first upper tubes 111 of the two side frames 11. The two side frames 11, the front heat sink, and the rear heat sink form a battery housing space 17. A battery box 7 is provided in the battery housing space 17. The battery box 7 is set at a roughly vertical angle. The bottom of the battery box 7 is fixed on the mounting plate 16. A guide rod is provided in the battery housing space 17. A guide groove is provided on the battery box 7 to cooperate with the guide rod. The guide rod can constrain the battery box 7 and enable the battery box 7 to be accurately positioned. The upper end of the lower tube 113 is connected to the middle position of the second upper tube 112. The upper end of the front heat sink is bent and extends to the space between the two second lower tubes 113. The space between the battery box 7 and the head tube 12 forms a charger housing space 18. The rear frame 2 includes an annular seat 21, first support rods 22 located on both sides below the annular seat 21, and second support rods 23 located below the first support rods 22. The front end of the annular seat 21 is located on the crossbeam 15. One end of the first support rod 22 is connected to the annular seat 21, and the other end of the first support rod 22 is connected to the first upper tube 111. One end of the second support rod 23 is connected to the first support rod 22, and the other end of the second support rod 23 is connected to the first upper tube 111. A seat cushion is provided on the annular seat 21, and a mounting crossbar is provided inside the annular seat 21.Below the annular seat 21, a horizontally arranged cylindrical speaker 6 is provided. The speaker 6 is fixed to the mounting crossbar by a hanger. The sound outlet of the speaker 6 faces outward. The speaker 6 is located under the seat cushion, which can cover and protect the speaker. The shape and position of the speaker 6 are similar to a traditional exhaust pipe. The speaker can also simulate the sound of a gasoline engine. A first decorative cover is provided between the second upper pipe 112 and the lower pipe 113. A second decorative cover is provided between the first upper pipe 111 and the second upper pipe 112. A third decorative cover is provided between the first support rod 22 and the second support rod 23. A fourth decorative cover is provided between the first support rod 22 and the annular seat 21. A flip cover for opening the battery storage space 17 is provided between the tops of the two side frames 11. The flip cover is hinged to the annular seat 21. After opening the flip cover, the battery box 7 can be taken out upward.

[0015] The principle of this utility model is as follows: the front frame 1 includes a first upper tube 111, a second upper tube 112 and a lower tube 113, and the rear frame 2 includes a ring seat 21, a first support rod 22 and a second support rod 23, resulting in higher overall structural strength of the frame; the side frames 11 and the front and rear heat dissipation plates form a battery housing space 17, which has a reasonable spatial layout. During driving, air can enter the battery housing space 17 through the heat dissipation plates to dissipate heat from the battery box 7.

Claims

1. An electric bicycle frame, comprising a front frame, a rear frame, a mounting box with a bottom bracket, and a rear fork, wherein the front frame is mounted on top of the mounting box, the rear frame is mounted behind the front frame, the rear fork is hinged to the mounting box via a hinge joint, the rear fork is located below the rear frame, and a shock absorber is provided between the rear frame and the rear fork; characterized in that: The front frame includes a head tube, symmetrically arranged side frames, and mounting plates. One end of each side frame is connected to the head tube, and the other end is connected to the mounting box. Each side frame includes a first upper tube, a second upper tube, and a lower tube. The first upper tube is L-shaped, with one end connected to the head tube and the other end connected to the mounting box. The second upper tube is located below the first upper tube, with one end connected to the head tube and the other end connected to the lower end of the first upper tube. One end of the lower tube is connected to the second upper tube, and the other end is connected to the mounting box. A front heat sink is located between the lower tubes of the two side frames. A rear heat sink is provided between the first upper tubes, and a crossbeam is provided between the first upper tubes of the two side frames. The two side frames, the front heat sink, and the rear heat sink form a battery housing space. The rear frame includes an annular seat, first support rods located on both sides below the annular seat, and a second support rod located below the first support rod. The front end of the annular seat is located on the crossbeam. One end of the first support rod is connected to the annular seat, and the other end of the first support rod is connected to the first upper tube. One end of the second support rod is connected to the first support rod, and the other end of the second support rod is connected to the first upper tube. A seat cushion is provided on the annular seat, and a mounting crossbeam is provided inside the annular seat.

2. The electric bicycle frame according to claim 1, characterized in that: Several reinforcing pipe fittings are provided between the first upper pipe and the second upper pipe.

3. The electric bicycle frame according to claim 1, characterized in that: A first decorative cover is provided between the second upper tube and the lower tube, a second decorative cover is provided between the first upper tube and the second upper tube, a third decorative cover is provided between the first support rod and the second support rod, a fourth decorative cover is provided between the first support rod and the annular seat, and a flip cover for opening the battery accommodating space is provided between the tops of the two side frames, and the flip cover is hinged to the annular seat.

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