WO2018099483A1

WO2018099483A1 - Frame of electric bicycle

Info

Publication number: WO2018099483A1
Application number: PCT/CN2017/114353
Authority: WO
Inventors: 刘钧; 刘益闯
Original assignee: 浙江超级电气科技有限公司
Priority date: 2016-12-03
Filing date: 2017-12-02
Publication date: 2018-06-07
Also published as: CN108146568A

Abstract

A frame of an electric bicycle, comprising a seat tube (12), a head tube (10), a top tube (9), a down tube (1), a bottom bracket shell (3), chain stays (7), a cylindrical battery (2), and a charging and discharging wire (5). The bottom bracket shell (3) is installed at the joint of the seat tube (12), the down tube (1), and the chain stays (7), and is provided with a battery mounting and removal opening (4) consistent and in communication with an inner hole of the down tube (1). The battery mounting and removal opening (4) is provided at and passes through a central axis through-hole (13) of the bottom bracket shell (3). The cylindrical battery (2) can be mounted or removed via the battery mounting and removal opening (4). A stopper block (6) is provided at an opening of the down tube (1) to limit the position of the cylindrical battery (2) in an axial and radial direction. The charging and discharging wire (5) has one end connected to both electrodes of the battery (2), and the other end led out via the battery mounting and removal opening (4) to be connected to a bicycle controller and a motor. An opening is provided at an upper portion of the down tube (1) to be a charging socket mounting opening (8). By designing a battery of an electric bicycle to have a cylindrical shape, and mounting the battery inside a down tube, the present invention optimally integrates the battery and a bicycle frame, enables easy mounting and removal of the battery, and simplifies a manufacturing process.

Description

Electric bicycle frame

Technical field

The invention belongs to the technical field of electric bicycles, and is particularly related to an electric bicycle frame.

Background technique

The existing electric bicycles have become more and more popular among people all over the world because of their advantages of environmental protection, safety and light weight. At present, the battery placement of electric bicycles is mainly external, and the batteries are placed on the frame of the bicycle, which affects the appearance of the vehicle. Increasing vehicle weight and increasing manufacturing cost; the applicant designed a battery built-in bicycle frame, including the frame middle tube, the frame front tube, the frame upper tube, the frame lower tube and the front fork, the frame The upper tube and the lower frame of the frame are fixedly mounted on the tube in the frame, and the front tube of the frame is installed at the intersection of the upper tube of the frame and the lower tube of the frame, and the upper tube and the frame of the frame are opened on the front tube of the frame. An opening having a uniform inner diameter of the lower tube from which the battery can be loaded and unloaded. However, after the assembly is finally completed, a large cover plate is required to cover the opening, which affects the appearance of the front side of the bicycle, and the front fork, the front wheel and the handlebar are required for disassembly and assembly. All the components are removed and the battery is disassembled and assembled, which is very troublesome.

Summary of the invention

The object of the present invention is to overcome the above-mentioned drawbacks of the existing electric bicycle, and to provide an electric bicycle frame with convenient and quick battery installation and light and beautiful structure.

To this end, the present invention adopts the following technical solutions: an electric bicycle frame, including a frame middle tube, a frame front tube, a frame upper tube, a frame lower tube, a five-way, a rear fork, a tubular battery, and a charging and discharging wire. The five-way is installed at the intersection of the middle tube of the frame, the lower tube of the frame and the rear fork, and is characterized in that the five-way is provided with a battery disassembly corresponding to the inner hole of the lower tube of the frame. The battery dismounting opening passes through the middle shaft through hole provided in the five-way, the tubular battery can be loaded or removed from the battery dismounting port, and a limit stop is arranged at the opening of the lower tube of the frame. The tubular battery is axially and radially limited. One end of the charging and discharging wire is connected to the two poles of the battery, and the other end is connected to the bicycle controller and the motor through the battery dismounting port, and a hole is arranged in the upper part of the lower tube of the frame as a charging socket. Mounting holes.

As a supplement and improvement of the above technical solutions, the present invention also includes the following technical features.

The limit stop is a flat type, comprising a base body and two plane cylinders integrally connected with the base body, an axial slot is formed between the two plane cylinders, and a through hole and an axial joint are arranged in the middle of the base body. The axial direction of the groove is uniform. In use, the expansion clamp is inserted between the lower tube of the frame and the tubular battery, and the screw passes through the through hole and rotates to open the slot between the two flat cylinders. The expansion has a fixed effect on the tubular battery.

The limit stop may also be a semi-circular expansion clamp, comprising a base body and a plane cylinder and a curved surface cylinder integrally connected with the base body, and an axis formed between the plane cylinder body and the curved surface cylinder body To the slot, the through hole in the middle of the base body is aligned with the axial direction of the axial slot. When in use, the expansion clamp is inserted between the lower tube of the frame and the tubular battery, and the screw passes through the through hole and rotates Expanding the slot between the plane cylinder and the curved face cylinder to fix the tubular battery.

The pipe wall of the lower frame of the frame is provided with a plurality of radial through holes spaced apart from each other, and each of the radial through holes is provided with a screw, and the tubular battery in the tube is fixed by rotating the screw to prevent the tubular shape. The battery moves radially within the tube.

The invention can achieve the following beneficial effects: by designing the battery of the electric bicycle into a tubular shape and embedding in the tube of the lower tube of the frame to form a battery built-in type, the battery and the frame are perfectly combined, the material consumption is saved, and the waterproof effect is good. It can well avoid the danger caused by burning and explosion caused by the battery, and set the disassembly and disassembly hole of the battery on the five-way connecting piece, so that the battery can be disassembled and assembled conveniently, the manufacturing process is simple and the appearance is beautiful. With a small drive motor, it looks like an ordinary bicycle, and the entire frame structure is light and in line with the current environmentally friendly low carbon requirements.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

Figure 2 is a schematic view showing the structure of the five-way connector of the present invention.

Figure 3 is a schematic view showing the structure of the flat expansion clip of the present invention.

detailed description

The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 3, the present invention includes a frame middle tube 12, a frame front tube 10, a frame upper tube 9, a frame lower tube 1, a five-way connecting member 3, a rear fork 7, a tubular battery 2, and The charging and discharging electric wire 5 and the five-way 3 are installed at the intersection of the frame middle tube 12, the frame lower tube 1 and the rear fork 7, and the five-way 3 is provided with the inner hole of the lower frame 1 of the frame. And a through-hole battery detaching port 4, the battery detaching port 4 is inserted through the middle-shaft through hole 13 provided in the five-way connecting member 3, and the tubular battery 2 can be loaded or unloaded from the battery detaching port 4 An inner hole of the lower tube 1 of the frame, one end of the charging and discharging electric wire 5 is connected to the electrode of the tubular battery 2, and the other end is taken out through the battery dismounting hole, and is connected with the bicycle controller and the motor, under the frame The upper part of the tube 1 is provided with a hole as a charging socket mounting hole 8, and the charging and discharging electric wire 5 is connected to the charging socket; a limiting stopper is arranged at the opening of the lower tube 1 of the frame, and the limiting stopper is a semi-circular expansion clamp. 6, comprising a base body 61 and a planar cylinder 62 and a curved face cylinder 63 integrally connected with the base body 61, and an axial joint formed between the plane cylinder 62 and the curved face cylinder 63 The slot is provided with a threaded through hole in the middle of the base body and is axially aligned with the axial slot. In use, the flat expansion clamp 6 is inserted between the lower frame tube 1 and the tubular battery 2 to form a curved surface cylinder 63. The curved side surface abuts against the inner wall of the lower frame 1 of the frame, the side of the planar cylinder 63 abuts the tubular battery, and the screw passes through the threaded through hole and extends into the axial joint under the action of rotation In the slot, the slot between the plane cylinder and the curved face cylinder is expanded to expand the tubular battery, and the pipe wall of the lower frame 1 of the frame is provided with a plurality of radial through holes spaced apart from each other. A screw is inserted into each of the radial through holes, and the tubular battery 2 in the tube is fixed by rotating the screw 11, thereby preventing the tubular battery 2 from moving radially in the tube. When the battery is disassembled, simply remove the middle shaft to remove or insert the battery, and do not need to remove the front fork, which is very convenient and quick.

In another embodiment, the limiting stopper may further be a flat expansion clamp, comprising a base body and two planar cylinders integrally connected with the base body, and an axial slot is formed between the two planar cylinders. The through hole in the middle of the base body is aligned with the axial direction of the axial slot. When in use, the expansion clamp is inserted between the lower tube of the frame and the tubular battery, and the screw passes through the through hole and rotates to form two planes. The expansion of the slots between the cylinders serves to fix the tubular battery.

Claims

An electric bicycle frame comprises a middle tube of a frame, a front tube of the frame, an upper tube of the frame, a lower tube of the frame, a five-way, a rear fork, a tubular battery and a charging and discharging electric wire, and the five-way is installed in the middle tube of the frame, The intersection of the lower frame of the frame and the rear fork is characterized in that: the five-way is provided with a battery dismounting port which is consistent with the inner hole of the lower tube of the frame, and the battery dismounting opening is arranged through The middle shaft through hole on the five-way, the tubular battery can be loaded or removed from the battery dismounting port, and a limit stop is arranged at the opening of the lower tube of the frame, and the tubular battery is axially and radially limited. One end of the charging and discharging wire is connected to the two poles of the battery, and the other end is connected to the bicycle controller and the motor through the battery dismounting port, and a hole is arranged in the upper part of the lower tube of the frame as the charging socket mounting hole.
The electric bicycle frame according to claim 1, wherein the limit stop is a flat expansion clamp, comprising a base body and two plane cylinders integrally connected with the base body, two planes An axial slot is formed between the cylinders, and the through hole is arranged in the middle of the base body to coincide with the axial direction of the axial slot.
The electric bicycle frame according to claim 1, wherein the limit stop is a semi-circular expansion clamp, and comprises a base body and a plane cylinder and a curved surface column integrated with the base body. An axial slot is formed between the body, the plane cylinder and the curved face cylinder, and the through hole in the middle of the base body is aligned with the axial direction of the axial slot.
The electric bicycle frame according to claim 2 or 3, wherein the pipe wall of the lower frame of the frame is provided with a plurality of radial through holes spaced apart from each other, and each of the radial through holes is bored. Screwed.