WO2020215406A1

WO2020215406A1 - Bicycle frame structure for novel electric bicycle

Info

Publication number: WO2020215406A1
Application number: PCT/CN2019/087183
Authority: WO
Inventors: 应儿
Original assignee: 浙江阿波罗摩托车制造有限公司
Priority date: 2019-04-25
Filing date: 2019-05-16
Publication date: 2020-10-29
Also published as: CN209795697U

Abstract

A bicycle frame structure for a novel electric bicycle, the structure comprising: a head tube (1), a top tube (2), a down tube (3), a seat tube (4), a seat post (5), a front fork (6), a seat stay (7), a chain stay (8), a central motor mounting frame (9), and a rear fork-end (10). A rear side of an upper portion of the head tube is connected to a front end of the top tube, a rear end of the top tube is connected to a front side of an upper end of the seat tube, and a lower end of the seat tube and a lower end of the down tube are connected to the central motor mounting frame, thereby forming a main triangle of a bicycle frame. A rear side of a lower portion of the head tube is provided with an insertion connection end and is inserted into, and connected to, an upper end opening of the down tube, and the insertion connection end of the head tube and the upper end opening of the down tube are provided with an invisible welding groove. The bicycle frame structure has the following advantages: providing a secure and aesthetically pleasing connection by means of an insertion connection for the head tube and the down tube, and welding the same to have an invisible welding groove; improving an operation efficiency for battery installation and wire routing; connecting the seat post and the seat tube securely; and providing a rear cargo rack to facilitate an object carrying capability.

Description

A new type of frame structure of electric bicycle

Technical field

The utility model relates to a frame, in particular to a frame structure of a novel electric bicycle.

Background technique

Electric bicycle refers to a mechatronics personal vehicle that uses storage batteries as auxiliary energy sources on the basis of ordinary bicycles and is equipped with motor, controller, storage batteries, handlebars and other operating components and display instrument systems. There are several defects in the structure design of the existing electric bicycle frame, mainly as follows:

1. The head tube and the down tube of the existing electric bicycle frame are connected by welding. On the one hand, welding is required during production, which causes process troubles. On the other hand, it also produces obvious welding beads and affects the appearance of the whole vehicle. degree.

2. The lower tube structure of the existing electric bicycle is a single-lumen structure, which is troublesome to install batteries and wire, and work efficiency is low.

3. The existing electric bicycle saddle tube and the middle tube adopt an exposed fixed connection structure, which is not firm when fixing the seat, which is prone to shaking, and it is not beautiful when exposed to the outside.

4. The existing electric bicycles are not equipped with a rear hanger, so it is inconvenient to carry things.

Therefore, the research and development of a new type of electric bicycle frame structure has become an urgent problem for those skilled in the art.

Utility model content

In order to solve the above shortcomings, the utility model provides a novel electric bicycle frame structure.

The above objectives of the present invention are achieved through the following technical solutions: a new type of electric bicycle frame structure, including a head tube, an upper tube, a down tube, a middle tube, a seat tube, a front fork, a seat stay, and a chain stay , The middle motor hanger and the rear hook; the upper back side of the head tube is connected to the front end of the upper tube, the rear end of the upper tube is connected to the front side of the upper end of the middle tube, and the lower end of the middle tube and the lower end of the down tube are connected to the middle motor hanger to form a car Frame front triangle; the lower end of the head tube is connected to the front fork, and the lower end of the front fork is connected to both sides of the front axle; the rear end of the central motor hanger is connected to one end of the chainstay, and the rear side of the upper end of the middle tube is connected to the end of the seat stay , The other end of the chain stay and the other end of the seat stay are connected to the rear hook claws, the rear hooks are connected to both sides of the rear wheel axle, the middle motor hanger is equipped with a motor, and the characteristic is that the rear part of the head tube The side is provided with a plug-in end, which is plugged into the upper port of the down tube, and the plug-in end of the head tube and the upper port of the down tube are provided with hidden welding grooves.

Further, a reinforcing piece is welded at the V-shaped included angle formed by the lower end of the middle tube and the lower tube.

Further, a cavity is provided in the lower tube, and a crimping plate is installed. The crimping plate separates the cavity of the lower tube into a battery cavity and a wire storage cavity. When installing, the crimping plate covers each wire, and then install the battery.

Further, an upper fixing seat and a lower fixing seat are installed at both ends of the battery cavity, an elastic lock and an elastic thimble are installed on the upper fixing seat, a discharge male is installed on the lower fixing seat, and the lower tube is provided with The lock hole is fixed with a lock holder and an elastic lock; the battery is installed in the battery cavity, and the battery is connected to the discharge male.

Further, the middle tube is provided with a saddle tube insertion cavity, the rear part of the saddle tube insertion cavity is provided with a downwardly inclined inclined surface, the front side of the inclined surface is a socket part, and the saddle tube is inserted into the socket The middle tube pressing block is inserted into the inclined surface part, the bottom of the middle tube pressing block is provided with a lower inclined surface that matches the inclined surface, and the middle tube pressing block is locked in the middle tube by screws.

Further, the rear hook is connected with a rear hanger, the lower end of the rear hanger is connected with the rear end of the rear hook, and the upper front end of the rear hanger is connected with the seat fork through the rear hanger attachment.

Assembly instructions of the utility model:

1. Insert the head tube into the lower tube, and then weld and grind it. Place the upper tube, middle tube, and middle motor hanger on the welding fixture and fix it to the angle required by the frame drawing and weld it into the front triangle of the frame.

2. Place the front triangle, rear seat fork, chainstay, and rear hooks in the welding jig in sequence and fix them to the angle required by the frame drawing and weld them into the frame.

3. Put the discharge male head into the lower fixing seat and fix it into the lower fixing seat assembly with M3 Phillips screws.

4. Clamp the elastic lock and elastic thimble on the upper fixing base, and fix them into the upper fixing base assembly with M3 Phillips screws.

5. Put the crimping plate in the lower tube of the frame, and fix the upper and lower fixing seat components on the inner wall of the lower tube with M3 cross countersunk screws.

6. Fix the lock holder with two M3 cross countersunk head screws on the lock hole of the lower tube of the frame.

7. Insert the battery into the upper and lower fixing base assembly and lock it with a key.

8. Insert the saddle tube into the middle tube of the frame, put the middle tube clamp into the middle tube and press it, and fix it in the middle tube with M6 hexagon socket screws to hide it.

9. Fix the lower leg of the rear hanger on the rear hook of the frame with two M6 hexagon socket screws and washers. The front end is attached and hidden inside the rear mud plate through the rear hanger, and fixed with 2 Phillips pan head screws On the seat stay of the frame. The overall appearance achieves the integrated effect of the frame, the rear fender and the rear hanger.

Compared with the prior art, the utility model has the advantages that: the head tube and the down tube in the utility model adopt a plug-in method, and through a hidden welding groove welding method, the joint is firm and beautiful; the battery is installed and The working efficiency of routing is greatly improved; the connection between the saddle tube and the middle tube is stable; the rear hanger is arranged to facilitate the carrying of items.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Figure 2 is a schematic diagram of the exploded structure of the present utility model.

Fig. 3 is a schematic diagram of a side structure of the lower tube part of the present invention.

Figure 4 is a schematic view of the other side of the lower tube part of the utility model.

Figure 5 is a schematic cross-sectional view of the middle tube in the present invention.

Figure 6 is a schematic cross-sectional view of the down tube in the present invention.

Figure 7 is a schematic diagram of the utility model with tires installed.

Detailed ways

The utility model is further described in detail below in conjunction with the drawings.

As shown in Figures 1 to 7, the frame structure of a new type of electric bicycle includes a head tube 1, an upper tube 2, a down tube 3, a middle tube 4, a seat tube 5, a front fork 6, a rear seat fork 7, and a rear Lower fork 8, middle motor hanger 9 and rear hook 10; the upper rear side of the head tube 1 is connected to the front end of the upper tube 2, the rear end of the upper tube 2 is connected to the front side of the upper end of the middle tube 4, the lower end of the middle tube 4 and the lower tube 3 The lower end is connected to the central motor hanger 9 to form a front triangle of the frame; the lower end of the head tube 1 is connected to the front fork 6, and the lower end of the front fork 6 is connected to both sides of the front wheel axle; the rear end of the central motor hanger 9 is connected One end of the chain stay 8, the rear side of the upper end of the middle tube 4 is connected to one end of the chain stay 7, the other end of the chain stay 8 and the other end of the chain stay 7 are jointly connected to the rear hook 10, and the rear hook 10 is connected to the rear On both sides of the axle, the central motor hanger 9 is equipped with a motor 11, which is characterized in that: the lower rear side of the head tube 1 is provided with a plug-in end 1-1, and is plugged into the upper port of the down tube 3, Concealed welding grooves are provided at the connecting end 1-1 and the upper port of the down tube 3. After the head tube 1 and the down tube 3 are welded together, they are polished so that the overall appearance is integrated without affecting the strength of the frame. Traditional frame welding + grinding is only welding and grinding on the outer surface of the frame, and the grinding process is difficult to control: there are fewer grinding beads, and the weld bead will be seen on the outside, which makes the appearance unsightly and can not achieve the integrated effect; Too much, resulting in insufficient strength of the welded part and easy to break.

Further, a reinforcing piece 12 is welded at the V-shaped angle formed by the lower end of the middle tube 4 and the lower tube 3.

Further, the down tube 3 is provided with a cavity 3-1, and a crimping plate 3-2 is installed, and the crimping plate 3-2 divides the cavity 3-1 of the down tube 3 into a battery cavity 3-11 And the storage cavity 3-12. When installing, the crimping board 3-2 covers each wire, and then install the battery. An upper fixing seat 3-3 and a lower fixing seat 3-4 are installed at both ends of the battery cavity, and an elastic lock 3-5 and an elastic thimble 3-6 are installed on the upper fixing seat 3-3. The lower fixing seat 3-4 is equipped with a discharge male connector 3-7, the down tube 3 is provided with a key hole 3-10, a lock holder 3-8 is fixed at the key hole, and an elastic lock 3-5 is installed; installed in the battery cavity There are batteries 3-9, and batteries 3-9 are connected to the discharge male connector 3-7. The utility model adopts the structure of the crimping plate 3-2 to fix the wire. After the electric bicycle wire can be placed very quickly and conveniently, it is covered by a crimping plate 3-2, and then the lower fixing seat 3-4 and the upper fixing seat 3-3 are respectively installed in the upper and lower ends of the lower tube 3 with M3 cross countersunk head screws to fix the crimping plate 3-2.

Further, the middle tube 4 is provided with a saddle tube insertion cavity 4-1, and the rear part inside the saddle tube insertion cavity 4-1 is provided with a downward slope 4-2, which is in front of the slope 4-2. The side is the socket part 4-3. The saddle tube 5 is inserted into the socket part 4-3, and a middle tube pressing block 4-4 is inserted into the inclined surface 4-2. The bottom of the middle tube pressing block 4-4 is provided The inclined surface 4-2 is a matching lower inclined surface 4-5, and the middle tube pressing block 4-4 is locked in the middle tube 4 by screws. The utility model first installs the saddle tube 5 into the middle tube 4 and adjusts it to a proper position, and then installs the middle tube pressing block 4-4 into the middle tube 4 from the top, passing through the bottom slope of the middle tube pressing block 4-4 and the inside of the middle tube 4 The inclined surface structure allows the middle tube clamp 4-4 to fix the saddle tube 5, and the middle tube clamp 4-4 is locked and fixed in the middle tube 4 by installing a washer with M6 hexagon socket screws.

Further, the rear hook 10 is connected with a rear hanger 13, the lower end of the rear hanger 13 is connected with the rear end of the rear hook 10, and the upper front end of the rear hanger 13 is connected with the rear seat fork 7 through the rear hanger attachment 14.

Assembly instructions of the utility model:

1. Insert the head tube 1 into the lower tube 3, and then perform welding and grinding. Place the upper tube 2, the middle tube 4, and the middle motor hanger 9 on the welding fixture and fix it to the angle required by the frame drawing and weld it into the frame Front triangle.

2. Place the front triangle, rear seat forks 7, chain stays 8, and rear hooks 10 in the welding jig and fix them to the angle required by the frame drawings and weld them into the frame.

3. Install the discharge male connector 3-7 into the lower fixing seat 3-4 and fix the assembly of the lower fixing seat 3-4 with M3 Phillips screws.

4. Clip the elastic lock 3-5 and elastic thimble 3-6 on the upper fixing seat 3-3, and fix them into the upper fixing seat 3-3 assembly with M3 Phillips screws.

5. Put the crimping plate 3-2 in the lower tube 3 of the frame, and fix the upper and lower fixing seat 3-3 components and the lower fixing seat 3-4 components on the inner wall of the lower tube 3 with M3 cross countersunk screws live.

6. Fix the lock holder 3-8 with two M3 cross countersunk head screws at the position of the lock hole of the lower tube 3 of the frame.

7. Insert the battery into the upper and lower fixing base 3-4 components and lock it with a key.

8. Insert the saddle tube 5 into the middle tube 4 of the frame, put the middle tube clamp 4-4 into the middle tube 4 and press it, and fix it in the middle tube 4 with M6 hexagon socket screws to hide it.

9. Fix the rear hanger 13 to the rear hook 10 of the frame by using two M6 hexagon socket screws and washers. The front end is hidden by the rear hanger attachment 14 on the inside of the rear mud board, and two crosses are used. The pan-head screws are fixed on the seat stay 7 of the frame. The overall appearance achieves the effect of a frame, a rear mud plate, and a rear hanger 13 in one.

The above are only the embodiments of the present utility model, and do not limit the scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model description and drawings, or directly or indirectly applied to other Related technical fields are included in the scope of patent protection of the utility model in the same way.

Claims

A new type of electric bicycle frame structure, including a head tube, an upper tube, a down tube, a middle tube, a saddle tube, a front fork, a seat stay, a chain stay, a middle motor hanger and a rear hook; the head The rear side of the upper part of the tube is connected to the front end of the upper tube, the rear end of the upper tube is connected to the front side of the upper end of the middle tube, the lower end of the middle tube and the lower end of the down tube are connected to the middle motor hanger to form a frame front triangle; the lower end of the head tube is connected to the front fork, The lower ends of the forks are connected to both sides of the front axle; the rear end of the middle motor hanger is connected to one end of the chainstay, the rear side of the middle tube is connected to one end of the chainstay, the other end of the chainstay, the other end of the chainstay Commonly connected to the rear claws, the rear claws are connected on both sides of the rear wheel shaft, the middle motor hanger is equipped with a motor, characterized in that: the lower rear side of the head tube is provided with a plug-in end, and is plugged into the upper tube Concealed welding grooves are arranged at the port, the plug-in end of the head tube and the upper port of the down tube.
The frame structure of a new type of electric bicycle according to claim 1, wherein the V-shaped included angle formed by the lower end of the middle tube and the lower tube is welded with a reinforcing piece.
The frame structure of a new type of electric bicycle according to claim 1, wherein the lower tube is provided with a cavity, and a crimping plate is installed, and the crimping plate separates the cavity of the down tube into a battery cavity And the deposit cavity.
The frame structure of a new type of electric bicycle according to claim 3, characterized in that: an upper fixing seat and a lower fixing seat are installed at both ends of the battery cavity, and an elastic lock and an elastic thimble are installed on the upper fixing seat The lower fixing seat is equipped with a discharge male head, the lower tube is provided with a key hole, the lock fixing seat is fixed at the key hole, and an elastic lock is installed; a battery is installed in the battery cavity, and the battery is connected to the discharge male head.
The frame structure of a new type of electric bicycle according to claim 1, wherein the middle tube is provided with a saddle tube insertion cavity, and the rear part of the saddle tube insertion cavity is provided with a downward slope The front side of the inclined surface is the socket part. The saddle tube is inserted into the socket and the middle tube pressing block is inserted into the inclined surface. The bottom of the middle tube pressing block is provided with a lower inclined surface that matches the inclined surface. The block is locked in the middle tube by screws.
The frame structure of a new type of electric bicycle according to claim 1, wherein the rear hook is connected with a rear hanger, the lower end of the rear hanger is connected with the rear end of the rear hook, and the upper front end of the rear hanger passes through the rear The hanger is attached and connected with the seat stay.