CN216269718U

CN216269718U - Electric bicycle frame

Info

Publication number: CN216269718U
Application number: CN202123061270.8U
Authority: CN
Inventors: 田国锋
Original assignee: Tianjin Shunfan Technology Co ltd
Current assignee: Tianjin Shunfan Technology Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-04-12
Anticipated expiration: 2031-12-07

Abstract

The utility model relates to an electric bicycle frame. Comprises an upper beam consisting of two upper beam tubes which are parallel and a lower beam consisting of two lower beam tubes which are parallel; the front ends of the upper beam and the lower beam are provided with front fork tubes, and the rear ends of the upper beam and the lower beam are provided with supporting plates; the rear seat support is provided with a controller box at the bottom, the front end of the rear seat support is provided with an installation plate with a threaded hole, and the installation plate is fixedly connected with the support plate by adopting an installation screw; a support rod is also arranged between the rear part of the lower beam pipe and the controller box; the bottom of the lower beam is provided with a middle shaft seat with a middle shaft sleeve, the lower beam further comprises a left V-shaped rear fork frame and a right V-shaped rear fork frame, the front ends of the two rear fork frames are provided with rotating shafts, the rotating shafts are located in shaft holes in the rear portion of the middle shaft seat, a fork frame base is arranged between the upper ends of the two rear fork frames, the bottom of the rear portion of the upper beam is provided with a beam base, and a shock absorber is arranged between the beam base and the fork frame base. The shock absorption device is reasonable in structural design, convenient to process, good in shock absorption effect and convenient to adjust.

Description

Electric bicycle frame

Technical Field

The utility model belongs to the technical field of bicycle parts, and particularly relates to an electric bicycle frame.

Background

With the development of technology and the improvement of living standard of people, electric bicycles are increasingly favored by people and play an increasingly important role in daily life of people. The frame of the electric bicycle is an important component of the electric bicycle, is one of important components of the electric bicycle, and is used as a mounting bracket of other auxiliary parts of the electric bicycle and a bracket when people ride the electric bicycle, so that the frame of the electric bicycle has very important influence on the structural strength of the whole electric bicycle and the working characteristics of the electric bicycle.

The existing bicycle frame is obtained by welding and splicing metal sections, and has many welding points, so that the production and processing process is complicated. On the other hand, considering that people need to filter jolts and vibrations from the ground when riding, therefore install the shock attenuation subassembly on electric bicycle's frame usually, the current frame installation of shock attenuation subassembly is usually installed the position unreasonable, and this results in electric bicycle frame's shock attenuation effect to receive the influence. In the case of an electric bicycle with a manned function, the height of a manned rear seat is generally required to be adjusted according to the manned condition, and the conventional electric bicycle frame is inconvenient for the adjustment operation.

In summary, the structure of the electric bicycle frame needs to be optimized to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides the electric bicycle frame which is reasonable in structural design, convenient to process, good in damping effect and convenient to adjust, and aims to solve the technical problems in the prior art.

The technical scheme adopted by the utility model for solving the technical problems in the prior art is as follows: an electric bicycle frame comprises an upper beam and a lower beam, wherein the upper beam is composed of two upper beam tubes which are parallel to each other, the lower beam is composed of two lower beam tubes which are parallel to each other, the upper beam tubes are straight, and the lower beam tubes are inverted trapezoidal; the front ends of the upper beam and the lower beam are provided with front fork tubes, the rear ends of the upper beam and the lower beam are provided with supporting plates, and the supporting plates are provided with a plurality of groups of connecting holes which are arranged along the vertical direction; the rear seat support is provided with a controller box at the bottom, the front end of the rear seat support is provided with an installation plate with a threaded hole, and the installation plate is fixedly connected with the support plate by adopting an installation screw; a support rod is further arranged between the rear part of the lower beam pipe and the controller box, the lower end of the support rod is hinged with an ear plate arranged on the lower beam pipe, and the upper end of the support rod is hinged with the side wall of the controller box; the bottom of underbeam is provided with a center shaft seat with a center shaft sleeve, and further comprises a left rear fork frame and a right rear fork frame which are V-shaped, wherein a rear fork piece is arranged outside the bending position of the rear fork frame, a rotating shaft is arranged at the front ends of the two rear fork frames, the rotating shaft is located in a shaft hole at the rear part of the center shaft seat, a fork frame base is arranged between the upper ends of the two rear fork frames, a beam base is arranged at the bottom of the rear part of the underbeam, and a shock absorber is arranged between the beam base and the fork frame base.

The utility model has the advantages and positive effects that:

compared with the existing electric bicycle frame, the electric bicycle frame has the advantages that the main body part of the frame is composed of the double-pipe-type upper beam, the double-pipe-type lower beam and the like, the number of components forming the main body part of the whole frame is reduced on the basis of ensuring the overall structural strength, the welding positions are reduced, and therefore the processing complexity of the frame is reduced. Meanwhile, the design of the inverted trapezoidal lower beam structure enables the middle part of the frame to form a large hollow space, so that enough space is provided for mounting components such as batteries, and the simple design of the whole vehicle structure is also ensured.

Through the backup pad that has the multiunit connecting hole at the rear portion installation of frame main part to adopt the mounting screw to fix between the mounting panel of order rear seat support and the backup pad, make rear seat support whole by the bracing piece support, realized rear seat support's height-adjustable's technical effect, when electric bicycle is in manned state like this, can carry out convenient altitude mixture control to rear seat support as required, promote manned stability and manned travelling comfort.

Through the front part and the middle shaft seat hinged connection that set up two back crotch, upper portion assemble in the crotch base and install the bumper shock absorber between crotch base and crossbeam base, make this electric bicycle frame possess more reasonable shock-absorbing structure and provide more reasonable shock attenuation effect. When riding and bumping, the two rear forks tilt and rotate by taking the rotating shaft between the two rear forks and the center shaft seat as a center, the shock absorber is compressed or released in the process, bumping energy is absorbed, and the vibration effect generated by bumping can be transmitted to the main body part of the frame less, so that the riding comfort can be improved.

Preferably: the rear ends of the upper beam pipe and the lower beam pipe on the left side are welded and connected, and the rear ends of the upper beam pipe and the lower beam pipe on the right side are welded and connected; the supporting plate is L-shaped, the upper part of the supporting plate is welded and fixed with the rear ends of the two upper beam pipes, and the lower edge of the supporting plate is welded and fixed with the two lower beam pipes.

Preferably: the rear seat support is U-shaped, and the mounting plate is welded and mounted at the front part of the rear seat support; and a rear seat connecting plate is welded in the middle of the rear seat support.

Preferably: the front part of the upper beam is welded with an upper battery connecting plate with a connecting hole, the rear part of the upper beam is welded with a middle seat connecting plate with a connecting hole, and the front part of the lower beam is welded with a front battery connecting plate with a connecting hole.

Preferably: and a reinforcing connecting plate is welded between the front parts of the lower ends of the two rear forks.

Preferably: rear pedal mounting seats are mounted on the outer sides of the rear portions of the two rear fork frames.

Preferably: and a tail lamp connecting plate with a connecting hole is arranged at the rear part of the bottom of the rear seat support.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1;

fig. 3 is a schematic diagram of the structure of the use state of the present invention.

In the figure:

1. a front fork tube; 2. a lower beam; 3. an upper battery connecting plate; 4. an upper beam; 5. a middle shaft sleeve; 6. a middle shaft seat; 7. reinforcing the connecting plate; 8. a rear pedal mounting base; 9. a rear fork piece; 10. a rear fork; 11. a middle seat connection plate; 12. a beam base; 13. a shock absorber; 14. a fork carriage base; 15. a support bar; 16. a support plate; 17. a rear seat attachment plate; 18. a controller box; 19. a rear seat support; 19-1, mounting plate; 19-2, mounting screws; 20. a tail light connecting plate; 21. a front battery connection plate; 22. a rechargeable battery; 23. riding a seat; 24. a rear seat; 25. a rear wheel; 26. a front wheel; 27. a front fork assembly; 28. a middle pedal assembly; 29. a front fender; 30. a rear fender.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are described in detail.

Referring to fig. 1 and 2, the electric bicycle frame of the present invention includes an upper frame 4 formed of two upper frame pipes arranged in parallel, the upper frame pipe having a straight shape, and a lower frame 2 formed of two lower frame pipes arranged in parallel, the lower frame pipe having an inverted trapezoidal shape. As shown in the drawing, each of the two upper beam pipes and the two lower beam pipes is made of a metal pipe section, the upper beam pipe is bent without bending and is in a straight shape, and the lower beam pipe is bent twice in a circular arc transition at the middle part to form an inverted trapezoid shape.

The front fork 1 is attached to the front ends of both the upper beam 4 and the lower beam 2, and the support plate 16 is attached to the rear ends of both. The front fork tube 1 is used for mounting a front fork of the electric bicycle, the front ends of the two upper beam tubes are welded and fixed with the rear part of the middle upper part of the front fork tube 1, and the front ends of the two lower beam tubes are welded and fixed with the rear part of the middle lower part of the front fork tube 1. The support plate 16 is located between the rear portion of the left side frame structure formed by the upper beam tube and the lower beam tube on the left side and the rear portion of the right side frame structure formed by the upper beam tube and the lower beam tube on the right side, and combines the left and right frame structures into a whole.

In this embodiment, be located left upper beam pipe and lower beam pipe rear end welded connection between them, be located right upper beam pipe and lower beam pipe rear end welded connection between them, formed aforementioned left side frame construction and right side frame construction respectively, backup pad 16 is the L shape, the bottom is buckled to the front, backup pad 16's upper portion and two upper beam pipe's rear end welded fastening, its lower part edge and two lower beam pipe welded fastening, structural strength when can guaranteeing to control two frame construction and connect like this.

The support plate 16 is provided with a plurality of groups of connecting holes arranged along the vertical direction, and further comprises a rear seat support 19 with a controller box 18 at the bottom, the front end of the rear seat support 19 is provided with an installation plate 19-1 with a threaded hole, and the installation plate 19-1 is fixedly connected with the support plate 16 by an installation screw 19-2.

The heights of the groups of connecting holes on the supporting plate 16 are different, so that the height of the rear seat support 19 can be adjusted and set. The controller box 18 is used as a protection box of the whole electric bicycle controller, and the whole electric bicycle controller is placed in the controller box 18, so that the whole electric bicycle controller can be effectively prevented from being collided with by external force, and a good protection effect is achieved.

In this embodiment, the rear seat support 19 is U-shaped, and the mounting plate 19-1 is welded to the front portion of the rear seat support 19, and when mounting, the mounting screw 19-2 is passed through the attachment hole of the support plate 16 from the front to the rear and then screwed into the threaded hole of the mounting plate 19-1.

In order to stably support the rear seat support 19 and improve the structural strength of the manned support, a support rod 15 is further installed between the rear part of the lower beam tube and the controller box 18, the lower end of the support rod 15 is hinged with an ear plate arranged on the lower beam tube, and the upper end of the support rod is hinged with the side wall of the controller box 18. When the height of the rear seat support 19 is adjusted, the support rod 15 deflects by a certain angle, and after the rear seat support 19 is fixed by the mounting screw 19-2, the support rod 15 can stably support the rear seat support 19.

A rear seat connecting plate 17 is welded to the middle of the rear seat bracket 19, and the rear seat connecting plate 17 is used for mounting a rear seat 24. An upper battery connecting plate 3 with a connecting hole is welded on the front part of the upper beam 4, a middle seat connecting plate 11 with a connecting hole is welded on the rear part of the upper beam, the upper battery connecting plate 3 is used for installing a rechargeable battery 22, and the middle seat connecting plate 11 is used for installing a riding seat 23. The front battery connecting plate 21 with the connecting hole is welded and installed on the front part of the lower beam 2, and the front battery connecting plate 21 is used for installing the rechargeable battery 22, so that the electric bicycle frame provided by the utility model has two positions for installing the rechargeable battery 22 on the upper part and the front part, and the rechargeable battery 22 can be selectively installed on one position or both positions, thereby improving the driving mileage.

A middle shaft seat 6 with a middle shaft sleeve 5 is installed at the bottom of the lower beam 2, the middle shaft seat 6 is welded and fixed with the two lower beam tubes of the lower beam 2, and the middle shaft sleeve 5 is used for installing a middle shaft of the electric bicycle and a middle pedal assembly.

The rear fork is characterized by further comprising a left V-shaped rear fork frame 10 and a right V-shaped rear fork frame 10, wherein a rear fork piece 9 is installed on the outer side of the bending position of the rear fork frame 10, the rear fork piece 9 is used for installing a rear wheel 25 of an electric bicycle, and the rear fork piece 9 and the bending position of the rear fork frame 10 are welded and fixed.

A rotation shaft is installed at the front ends of the two rear forks 10 and is positioned in a shaft hole at the rear of the center shaft base 6, a fork base 14 is installed between the upper ends of the two rear forks 10, a beam base 12 is installed at the rear bottom of the upper beam 4, and a damper 13 is installed between the beam base 12 and the fork base 14. The combination of the two rear forks 10 and their rear fork blades 9, the fork base 14 and the shaft can be tilted and rotated around the shaft, and the damper 13 is compressed or released to achieve the damping effect. The damper 13 may be selected from conventional spring type dampers, pneumatic type dampers, etc.

Specifically, the front ends of the two rear forks 10 are welded and fixed to the rotating shaft, the rear portion of the center shaft seat 6 is open and shaft holes are formed in the two sides of the opening, and the two ends of the rotating shaft are located in the shaft holes in the two sides respectively. The upper ends of the two rear forks 10 are welded and fixed with the fork base 14, and the beam base 12 is welded and fixed with the upper beam tube.

In this embodiment, in order to improve the structural strength of the aforementioned assembly, a reinforcing connecting plate 7 is welded between the lower end front portions of the two rear forks 10 in this embodiment. As shown in the drawing, the reinforcing connecting plate 7 is located rearward of the rotating shaft.

In this embodiment, rear pedal mounts 8 are mounted on the outer sides of the rear portions of the two rear forks 10, and the two rear pedal mounts 8 are used for mounting rear pedal assemblies for a person sitting on the rear seat 24 to step on.

In this embodiment, a tail light attachment plate 20 having an attachment hole is attached to a rear portion of the bottom of the rear seat bracket 19, and the tail light attachment plate 20 is used to attach and fix a tail light of the electric bicycle.

The assembling method comprises the following steps:

referring to fig. 3, a front fork assembly 27 of the electric bicycle is mounted in the front fork tube 1, and a front wheel 26 of the bicycle is mounted on the front fork assembly 27; the rear wheel 25 (with hub motor) of the electric bicycle is arranged between the two rear fork blades 9; mounting the central pedal assembly 28 within the central hub 5; a front mudguard 29 is arranged on the front wheel 26, a rear mudguard 30 is arranged on the rear wheel 25, the front mudguard 29 is arranged and fixed on the front fork assembly 27, and the rear mudguard 30 is arranged and fixed under the fork frame base 14; rear pedal assemblies can be arranged on the left rear pedal mounting seat 8 and the right rear pedal mounting seat 8;

a rear seat 24 is arranged on the rear seat connecting plate 17, a rechargeable battery 22 is arranged on the upper battery connecting plate 3 and/or the front battery connecting plate 21, and a riding seat 23 is arranged on the middle seat connecting plate 11; mounting a tail light assembly on the tail light attachment plate 20; the controller of the electric bicycle is placed in the controller box 18 and fixed, the cables of all the electric components extend into the controller box 18 and are connected with the controller, and the middle parts of all the cables are fixed on the frame by adopting wire clamps.

Claims

1. An electric bicycle frame is characterized in that: the beam comprises an upper beam (4) consisting of two upper beam pipes which are parallel and a lower beam (2) consisting of two lower beam pipes which are parallel, wherein the upper beam pipes are straight, and the lower beam pipes are inverted trapeziform; the front fork tubes (1) are arranged at the front ends of the upper beam (4) and the lower beam (2), the supporting plates (16) are arranged at the rear ends of the upper beam and the lower beam, and a plurality of groups of connecting holes which are arranged along the vertical direction are formed in the supporting plates (16); the device also comprises a rear seat support (19) with a controller box (18) at the bottom, wherein a mounting plate (19-1) with a threaded hole is mounted at the front end of the rear seat support (19), and the mounting plate (19-1) is fixedly connected with the support plate (16) by a mounting screw (19-2); a support rod (15) is further arranged between the rear part of the lower beam pipe and the controller box (18), the lower end of the support rod (15) is hinged with an ear plate arranged on the lower beam pipe, and the upper end of the support rod is hinged with the side wall of the controller box (18);

install well axle bed (6) that have well axle sleeve (5) in the bottom of underbeam (2), still include back crotch (10) of controlling two V-arrangements, back yoke piece (9) are installed outside the position of buckling of back crotch (10), install the pivot and this pivot is located the axle hole at well axle bed (6) rear portion at the front end of two back crotch (10), install crotch base (14) between the upper end of two back crotch (10), crossbeam base (12) are installed to the rear portion bottom of entablature (4), install bumper shock absorber (13) between crossbeam base (12) and crotch base (14).

2. The electric bicycle frame as claimed in claim 1, wherein: the rear ends of the upper beam pipe and the lower beam pipe on the left side are welded and connected, and the rear ends of the upper beam pipe and the lower beam pipe on the right side are welded and connected; the support plate (16) is L-shaped, the upper part of the support plate is welded and fixed with the rear ends of the two upper beam tubes, and the lower edge of the support plate is welded and fixed with the two lower beam tubes.

3. The electric bicycle frame as claimed in claim 2, wherein: the rear seat support (19) is U-shaped, and the mounting plate (19-1) is welded and mounted at the front part of the rear seat support (19); a rear seat connecting plate (17) is welded and installed in the middle of the rear seat support (19).

4. The electric bicycle frame as claimed in claim 3, wherein: an upper battery connecting plate (3) with a connecting hole is welded and installed at the front part of the upper beam (4), a middle seat connecting plate (11) with a connecting hole is welded and installed at the rear part of the upper beam, and a front battery connecting plate (21) with a connecting hole is welded and installed at the front part of the lower beam (2).

5. The electric bicycle frame as claimed in claim 4, wherein: and a reinforcing connecting plate (7) is welded and installed between the front parts of the lower ends of the two rear forks (10).

6. The electric bicycle frame as claimed in claim 5, wherein: rear pedal mounting seats (8) are mounted on the outer sides of the rear parts of the two rear forks (10).

7. The electric bicycle frame as claimed in claim 6, wherein: and a tail lamp connecting plate (20) with a connecting hole is arranged at the rear part of the bottom of the rear seat support (19).