CN220298667U

CN220298667U - Electric bicycle frame

Info

Publication number: CN220298667U
Application number: CN202322079296.8U
Authority: CN
Inventors: 施志雄; 吕汉雄; 石贤海; 黄津
Original assignee: Zhejiang Oufei Electric Vehicle Co ltd
Current assignee: Zhejiang Oufei Electric Vehicle Co ltd
Priority date: 2023-08-03
Filing date: 2023-08-03
Publication date: 2024-01-05
Anticipated expiration: 2033-08-03

Abstract

The utility model discloses an electric bicycle frame which comprises a lower pipe, a vertical pipe and a rear fork, wherein one end of the lower pipe is provided with a mounting part for mounting a power component, one end of the vertical pipe is fixedly connected with the mounting part, the rear fork comprises a lower rear fork, an upper rear fork I and a connecting plate, one end of the lower rear fork is fixedly connected with the mounting part, the connecting plate is fixedly connected with the other end of the lower rear fork, one end of the upper rear fork I is fixedly connected with the vertical pipe, the other end of the upper rear fork I is fixedly connected with the connecting plate, and the lower rear fork comprises a connecting pipe I, a connecting pipe II and a breakpoint connecting component. The electric bicycle frame obtains the breakpoint structure that is convenient for the chain to install or dismantle based on quick assembly disassembly structure, only needs to use conventional instrument can make the rear fork in the state that the rear fork department assembly opening is in opening or closes down, from this the operation of the installation chain of greatly being convenient for, helps improving production efficiency.

Description

Electric bicycle frame

Technical Field

The utility model relates to an electric bicycle frame.

Background

Electric bicycles are important daily vehicles, and are required in various fields of society, so that the electric bicycles are indispensable vehicles for social production activities. With the diversification of application scenes, the subdivision types of electric bicycles become various, and the subdivision types comprise heavy-duty electric bicycles which are suitable for heavy-duty environments and off-road traveling. The electric bicycle is structurally characterized in that the parts of the frame are assembled in a welding mode, and the welding part is high in mechanical strength, so that the electric bicycle meets the load requirement. So that the electric bicycle frame forms a firm integrated structure through welding.

After the rear wheel is installed on the frame of the electric bicycle, the rear fork on the frame can extend into the area between the chain plate in the pedal area and the chain plate of the rear wheel. Because the welding mode can not be dismantled at will, the chain can receive the interference of rear fork and can't enter into the region between the chain plate in pedal region and the chain plate of rear wheel when the installation chain. Only the area between the chain plate of the foot pedal area and the chain plate of the rear wheel can normally install the chain.

In order to solve the interference problem encountered during the installation operation in the prior art, the lower rear fork of the rear fork is cut off to form a breakpoint structure, so that the chain can be fused with the rear fork through the breakpoint structure, and then the position of the rear fork disconnection is treated in a welding mode. The processing means has the problem of complicated operation, and is inconvenient to improve the production efficiency.

Disclosure of Invention

The utility model aims to solve the technical problem of simply passing a chain through a rear fork so as to obtain an electric bicycle frame.

In order to solve the technical problems, the utility model adopts the following technical scheme: this electric bicycle frame includes down pipe, riser, rear fork, the one end of down pipe is equipped with the installation department that is used for installing power component, the one end and the installation department fixed connection of riser, the rear fork includes lower rear fork, goes up rear fork I, connecting plate, one end and the installation department fixed connection of lower rear fork, connecting plate fixed connection is at the other end of lower rear fork, go up the one end and the riser fixed connection of rear fork I, go up the other end and the connecting plate fixed connection of rear fork I, the rear fork includes connecting pipe I, connecting pipe II and breakpoint adapting unit down, breakpoint adapting unit includes mounting and quick-release piece, the one end and the installation department fixed connection of connecting pipe I, the other end fixed connection of connecting pipe I a mounting, one end and the connecting plate fixed connection of connecting pipe II, the other end fixed connection of connecting pipe II also forms the assembly opening between two mounts, be equipped with the spacing groove that is the T shape on the mounting, the opening orientation of spacing groove is perpendicular to lower rear fork, be equipped with the corresponding spacing groove that the T is equipped with on the quick-release piece and take out the protruding spacing groove that the two is equipped with between the fixed connection of two corresponding T shape spacing groove.

The structure capable of being quickly disassembled and assembled is arranged at the lower rear fork of the rear fork, and a break point structure is formed at the lower rear fork of the rear fork by adopting a conventional tool, so that the chain can be conveniently installed. In addition, the lower rear fork is provided with a reinforced structure at the breakpoint structure, namely an embedded structure of the limit protrusion and the limit groove, and can have stronger mechanical properties than a common pipe. After the breakpoint connection parts on the lower rear fork are separated, the assembly opening between the two fixing parts can ensure that the chain transversely penetrates into the rear fork from the opening; after the chain is in place, the quick-release member is mounted on the two fixing members, the assembly opening is plugged, and the transverse penetrating function provided by the assembly opening to the chain is closed.

The space that the assembly opening took is to its mechanical properties factor of weakening to whole lower back fork, in order to compensate this not enough, eliminates down the back fork and has missed the problem that the mechanical strength is not enough that the body leads to because of the assembly opening part, this technical scheme is equipped with the strengthening rib of embedding at the assembly opening on the quick detach piece, the strengthening rib protrusion is between two spacing archs. When the quick release member is combined with the two fixing members, the reinforcing ribs are embedded into the assembly openings, so that the assembly openings of the lower rear fork are filled. After the reinforcing ribs fill the assembly openings, the overall mechanical properties of the lower rear fork are improved, and particularly the torsional strength is improved.

In order to further improve the effect of the reinforcing ribs, the technical scheme contemplates a structure capable of tightly connecting the quick-release piece and the fixing piece. Be equipped with spacing face I and spacing face II on the quick-release member, spacing face I is located the both ends of quick-release member, spacing face II is located the both sides of strengthening rib, be equipped with spacing face III that corresponds spacing face II on the mounting to and correspond spacing face IV of spacing face I, spacing face III is located the one end of spacing groove and is located the tip of mounting, spacing face IV is located the other end of spacing groove and is located the middle part of mounting. After quick-release part and two mounting combine, spacing face I laminates with spacing face III, spacing face II laminates with spacing face III for quick-release part and mounting zonulae occludens, both form the integration degree and improve.

The quick release is a solid structure with significant mechanical strength so that it has the conditions for mounting the tension members. Therefore, in the technical scheme, the lower rear fork further comprises a tensioning component mounting seat, and the tensioning component mounting seat is fixed below the quick-release piece. The tensioning component for tensioning the chain can be fixedly arranged on the lower rear fork through the tensioning component mounting seat.

The distribution characteristic of the bolts for connecting the quick-release piece and the fixing piece can bring positive effects to the improvement of mechanical properties of the lower rear fork, and for this technical scheme, the optimal distribution characteristic of the bolts is provided, the bolt holes I are fixedly arranged, the bolt holes I are arranged in a regular triangle with the central line coincident with the extending direction of the lower rear fork, the quick-release piece is provided with the bolt holes II, and the bolt holes II are arranged in a regular triangle with the central line coincident with the extending direction of the lower rear fork.

In order to strengthen the whole bearing capacity of the frame, a connecting column is arranged on a fixing piece at the end part of the connecting pipe II, the rear fork further comprises an upper rear fork II, one end of the upper rear fork II is fixedly connected with the other end of the vertical pipe, and the other end of the upper rear fork II is fixedly connected with the connecting column.

The utility model adopts the technical scheme that: the electric bicycle frame obtains the breakpoint structure that is convenient for the chain to install or dismantle based on quick assembly disassembly structure, only needs to use conventional instrument can make the rear fork in the state that the rear fork department assembly opening is in opening or closes down, from this the operation of the installation chain of greatly being convenient for, helps improving production efficiency.

Drawings

The utility model is described in further detail below with reference to the drawings and the detailed description.

FIG. 1 is a front elevational view of a first embodiment of an electric bicycle frame in accordance with the present utility model;

FIG. 2 is a rear elevational view of a first embodiment of an electric bicycle frame in accordance with the present utility model;

FIG. 3 is a perspective view of one of the fixing members of the first embodiment of the electric bicycle frame of the present utility model;

FIG. 4 is a perspective view of a quick release of a first embodiment of an electric bicycle frame in accordance with the present utility model;

FIG. 5 is a view showing a state in which an assembly opening is formed between fixing members of a first embodiment of a frame for an electric bicycle in accordance with the present utility model;

FIG. 6 is a perspective view of another fixing member of the first embodiment of the electric bicycle frame of the present utility model;

fig. 7 is a perspective view of a break point connection part of a first embodiment of a frame of an electric bicycle according to the present utility model;

fig. 8 is a front view of a third embodiment of a frame for an electric bicycle according to the present utility model.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5, 6, 7, a first embodiment of the present utility model.

The electric bicycle frame comprises a lower tube 1, a vertical tube 2 and a rear fork 4. The lower tube 1 is positioned at the front end of the whole electric bicycle frame; one end of the lower pipe 1 is provided with an installation part 3 for installing a power component, a motor of the electric bicycle is installed at the installation part 3, and the other end of the lower pipe 1 is used for installing a head pipe. The vertical pipe 2 is positioned in the middle of the whole electric bicycle frame, one end of the vertical pipe 2 is fixedly connected with the mounting part 3 in a welding mode, and the other end of the vertical pipe 2 is used for mounting a saddle.

Two sides of the electric bicycle frame are respectively provided with a rear fork 4, and the two rear forks 4 are symmetrically distributed relative to the vertical pipe 2. The rear forks 4 on both sides comprise a lower rear fork 5, an upper rear fork I6, an upper rear fork II 7 and a connecting plate 8.

The lower rear fork 5 is integrally provided with one end fixedly connected to the mounting part 3 in a welding manner and the other end fixedly connected to the connecting plate 8 in a welding manner. The connecting plate 8 is used for installing a rotating shaft of the rear wheel, namely the rear wheel, and is installed on the connecting plate 8. One end of the upper rear fork I6 is fixedly connected with the vertical pipe 2 in a welding mode, and the other end of the upper rear fork I6 is fixedly connected with the connecting plate 8 in a welding mode. The upper rear fork I6, the lower rear fork 5 and the vertical pipe 2 form a stable stress structure.

The lower rear fork 5 of the rear fork 4 at one side is of a split structure and comprises a connecting pipe I9, a connecting pipe II 10, a breakpoint connecting part 25 and a tensioning part mounting seat 11. The connecting pipe I9 and the connecting pipe II 10 are both pipe structures. One end of a connecting pipe I9 is fixedly connected with the mounting part 3 in a welding mode, and one end of a connecting pipe II 10 is fixedly connected with the connecting plate 8 in a welding mode; the connecting pipes i 9 and ii 10 are distributed in the same extending direction, that is, the extending direction of the lower rear fork 5, which corresponds to the feature that the lower rear fork 5 is a straight structure as a whole. The lower rear fork 5 of the rear fork 4 on the other side is of an integrated structure, one end of the lower rear fork 5 is fixedly connected to the mounting part 3 in a welding manner, and the other end of the lower rear fork 5 is fixedly connected to the connecting plate 8 in a welding manner; one end of the upper rear fork I6 is fixedly connected with the vertical pipe 2 in a welding mode, and the other end of the upper rear fork I6 is fixedly connected with the connecting plate 8 in a welding mode; one end of the upper rear fork II 7 is fixedly connected with the other end of the vertical pipe 2 in a welding mode, and the other end of the upper rear fork II 7 is fixedly connected with the lower rear fork 5 in a welding mode.

The break-point connection 25 comprises two fixing elements 12 and a quick release element 20.

One end of the fixing piece 12 is provided with a T-shaped limit groove 13, and the other end is provided with a connecting protrusion 14; be equipped with three bolt hole I15 on the mounting 12, the bolt hole I15 distributes and is regular triangle arrangement, and the interval of arbitrary adjacent bolt hole I15 is all equal promptly, and bolt hole I15 all communicates with spacing groove 13. The fixing piece 12 is provided with a step structure from the end provided with the limit groove 13 to the end provided with the connecting protrusion 14, the step structure is positioned in the middle of the fixing piece 12, and a limit surface IV 17 is formed at the kick surface of the step structure; a limiting surface III 18 is arranged at one end of the limiting groove 13 and at the end of the fixing piece 12. The other end of the connecting tube I9 is fixedly connected with a fixing member 12 in a welding manner, and a connecting protrusion 14 of the fixing member 12 is embedded in the connecting tube I9. The other end of the connection pipe II 10 is fixedly connected with another fixing piece 12 in a welding manner, and the connection protrusion 14 of the fixing piece 12 is embedded in the connection pipe II 10. After installation, the opening of the limiting groove 13 faces to the extending direction perpendicular to the lower rear fork 5, namely, the opening of the limiting groove 13 is positioned on one side of the fixing piece 12; the limiting surface III 18 on one fixing piece 12 is opposite to and parallel to the limiting surface III 18 on the other fixing piece 12, the limiting surface IV 17 on one fixing piece 12 is opposite to and parallel to the limiting surface IV 17 on the other fixing piece 12, and an assembly opening 19 is formed between the two fixing pieces 12 in a separated mode.

The quick release member 20 is provided with two symmetrically distributed T-shaped limit protrusions 21 corresponding to the limit grooves 13. The quick release 20 is provided with a reinforcing rib 22 between two stop lugs 21 for insertion into the mounting opening 19. Be equipped with spacing face I23 and spacing face II 24 on the quick release member 20, spacing face I23 is located the both ends of quick release member 20, and spacing face II 24 is located the both sides of strengthening rib 22. The quick-dismantling piece 20 is provided with bolt holes II 16, three bolt holes II 16 are a group, two groups of bolt holes II 16 are distributed on two sides of the reinforcing rib 22 respectively, the two groups of bolt holes II 16 are symmetrically distributed relative to the reinforcing rib 22, and each group of bolt holes II 16 is arranged in a regular triangle.

The quick release member 20 is fixedly connected with the fixing member 12 through bolts. Firstly, the limit protrusions 21 of the quick release piece 20 are respectively embedded into the limit grooves 13 of the fixing piece 12, and the reinforcing ribs 22 are embedded into the assembly openings 19; at this time, any one of the bolt holes I15 is aligned with one of the bolt holes II 16, the bolt holes I15 are arranged in a regular triangle with the center line overlapping with the extending direction of the lower rear fork 5, and the bolt holes II 16 are arranged in a regular triangle with the center line overlapping with the extending direction of the lower rear fork 5. Next, the bolts are screwed into the bolt holes i 15 and ii 16. After installation, limiting surface I23 is attached to limiting surface III 18, and limiting surface II 24 is attached to limiting surface III 18, so that the fixing piece 12 is connected with the quick-release piece 20 more tightly.

The tensioning member mount 11 is integral with the quick release 20 and is secured below the quick release 20. The tensioning member mounting base 11 is used for mounting a chain tensioning member.

The fixing piece 12 positioned at the end part of the connecting pipe II 10 is provided with a connecting column 26, one end of the upper rear fork II 7 is fixedly connected with the other end of the vertical pipe 2 in a welding mode, and the other end of the upper rear fork II 7 is fixedly connected with the connecting column 26 in a welding mode.

When the quick release member 20 is separated from the fixing member 12, the assembly opening 19 is in an open state, and any part of the chain can ensure the area between the chain plate in the pedal area and the chain plate of the rear wheel after passing through the assembly opening 19; after the quick release member 20 is fixedly connected with the fixing member 12 by the bolts, the assembly opening 19 is in a closed state, and the lower rear fork 5 is restored to an integral state.

The second embodiment of the present utility model is different from the first embodiment in that the lower rear fork of the rear fork at both sides is of a split structure.

A third embodiment of the utility model, shown in fig. 8, differs from the first embodiment in that no rear fork ii is provided. The rear forks 4 on both sides only comprise a lower rear fork 5, an upper rear fork I6 and a connecting plate 8.

The lower rear fork 5 of the rear fork 4 at one side is of a split structure and comprises a connecting pipe I9, a connecting pipe II 10, a breakpoint connecting part 25 and a tensioning part mounting seat 11. The connecting pipe I9 and the connecting pipe II 10 are both pipe structures. One end of a connecting pipe I9 is fixedly connected with the mounting part 3 in a welding mode, and one end of a connecting pipe II 10 is fixedly connected with the connecting plate 8 in a welding mode; the connecting pipes i 9 and ii 10 are distributed in the same extending direction, that is, the extending direction of the lower rear fork 5, which corresponds to the feature that the lower rear fork 5 is a straight structure as a whole. The lower rear fork 5 of the rear fork 4 on the other side is of an integrated structure, one end of the lower rear fork 5 is fixedly connected to the mounting part 3 in a welding manner, and the other end of the lower rear fork 5 is fixedly connected to the connecting plate 8 in a welding manner; one end of the upper rear fork I6 is fixedly connected with the vertical pipe 2 in a welding mode, and the other end of the upper rear fork I6 is fixedly connected with the connecting plate 8 in a welding mode.

The break-point connection part comprises two fixing elements and a quick release element.

One end of the fixing piece is provided with a T-shaped limit groove, and the other end of the fixing piece is provided with a connecting protrusion; be equipped with three bolt hole I on the mounting, the I distribution of bolt hole is regular triangle arrangement, and the interval of arbitrary adjacent bolt hole I all equals promptly, and the bolt hole I all communicates with the spacing groove. The fixing piece is provided with a step structure from the end provided with the limit groove to the end provided with the connecting protrusion, the step structure is positioned in the middle of the fixing piece, and a limit surface IV is formed at the kick surface of the step structure; the end part which is positioned at one end of the limiting groove and positioned at the fixing piece is provided with a limiting surface III. The other end of the connecting pipe I9 is fixedly connected with a fixing piece in a welding mode, and a connecting protrusion of the fixing piece is embedded in the connecting pipe I9. The other end of one end of the connecting pipe II 10 is fixedly connected with another fixing piece in a welding mode, and the connecting protrusion of the fixing piece is embedded in the connecting pipe II 10. After installation, the opening of the limiting groove faces to the extending direction perpendicular to the lower rear fork 5, namely, the opening of the limiting groove is positioned on one side of the fixing piece; the limiting surface III on one of the fixing pieces is opposite to and parallel to the limiting surface III on the other fixing piece, the limiting surface IV on one of the fixing pieces is opposite to and parallel to the limiting surface IV on the other fixing piece, and an assembly opening is formed between the two fixing pieces.

Two T-shaped limit protrusions which correspond to the limit grooves and are symmetrically distributed are arranged on the quick-dismantling piece. The quick release member is provided with a reinforcing rib between the two limit protrusions for being embedded in the assembly opening. Be equipped with spacing face I and spacing face II on the quick release piece 20, spacing face I is located the both ends of quick release piece 20, and spacing face II is located the both sides of strengthening rib. Be equipped with bolt hole II on the quick detach piece, three bolt hole II are a set of, respectively distribute a set of bolt hole II in the strengthening rib both sides, and two sets of bolt holes II are for strengthening rib symmetric distribution, and every group of bolt hole II is arranged and is regular triangle.

The quick-dismantling piece is fixedly connected with the fixing piece through bolts. Firstly, respectively embedding limit protrusions of the quick-release part into limit grooves of the fixing part, and embedding reinforcing ribs into the assembly openings; at this time, any one of the bolt holes I is aligned with one of the bolt holes II, the bolt holes I are arranged in a regular triangle with the center line overlapping with the extending direction of the lower rear fork 5, and the bolt holes II are arranged in a regular triangle with the center line overlapping with the extending direction of the lower rear fork 5. Next, the bolts are screwed into the bolt holes i and ii. After installation, the limiting surface I is attached to the limiting surface III, and the limiting surface II is attached to the limiting surface III, so that the fixing piece and the quick-dismantling piece are connected more tightly.

The tensioning component mounting seat and the quick-release component are integrated into a whole, and the tensioning component mounting seat and the quick-release component are fixed below the quick-release component. The tensioning component mounting seat is used for mounting a chain tensioning component.

The fourth embodiment of the present utility model is different from the third embodiment in that the lower rear fork of the rear fork at both sides is a split structure.

Claims

1. The electric bicycle frame comprises a lower pipe (1), a vertical pipe (2) and a rear fork (4), wherein one end of the lower pipe (1) is provided with an installation part (3) for installing a power component, one end of the vertical pipe (2) is fixedly connected with the installation part (3), the rear fork (4) comprises a lower rear fork (5), an upper rear fork I (6) and a connecting plate (8), one end of the lower rear fork (5) is fixedly connected with the installation part (3), the connecting plate (8) is fixedly connected with the other end of the lower rear fork (5), one end of the upper rear fork I (6) is fixedly connected with the vertical pipe (2), the other end of the upper rear fork I (6) is fixedly connected with the connecting plate (8), the electric bicycle frame is characterized in that the lower rear fork (5) comprises a connecting pipe I (9), a connecting pipe II (10) and a breakpoint connecting component (25), the breakpoint connecting component (25) comprises a fixing piece (12) and a quick-release piece (20), one end of the lower rear fork I (5) is fixedly connected with the installation part (3), one end of the connecting pipe II (12) is fixedly connected with the connecting pipe II (12), the assembly opening (19) is formed in a separation mode between two fixing pieces (12), a T-shaped limiting groove (13) is formed in each fixing piece (12), the opening direction of each limiting groove (13) is perpendicular to the extending direction of the lower rear fork (5), two T-shaped limiting protrusions (21) which correspond to the corresponding limiting grooves (13) and are symmetrically distributed are arranged on each quick-dismantling piece (20), the limiting protrusions (21) are embedded in the limiting grooves (13), and the fixing pieces (12) are fixedly connected with the quick-dismantling pieces (20) through bolts.

2. The electric bicycle frame according to claim 1, wherein: the quick release member (20) is provided with a reinforcing rib (22) embedded in the assembly opening (19), and the reinforcing rib (22) protrudes between the two limiting protrusions (21).

3. The electric bicycle frame according to claim 2, wherein: be equipped with spacing face I (23) and spacing face II (24) on quick-release member (20), spacing face I (23) are located the both ends of quick-release member (20), spacing face II (24) are located the both sides of strengthening rib (22), be equipped with spacing face III (18) of corresponding spacing face II (24) and spacing face IV (17) of corresponding spacing face I (23) on mounting (12), spacing face III (18) are located the one end of spacing groove (13) and are located the tip of mounting (12), spacing face IV (17) are located the other end of spacing groove (13) and are located the middle part of mounting (12).

4. The electric bicycle frame according to claim 1, wherein: the lower rear fork (5) further comprises a tensioning component mounting seat (11), and the tensioning component mounting seat (11) is fixed below the quick-release piece (20).

5. The electric bicycle frame according to claim 1, wherein: the fixing device is characterized in that a bolt hole I (15) is formed in the fixing device, the bolt hole I (15) is arranged in a regular triangle shape with the center line coincident with the extending direction of the lower rear fork (5), a bolt hole II (16) is formed in the quick-dismantling piece (20), and the bolt hole II (16) is arranged in a regular triangle shape with the center line coincident with the extending direction of the lower rear fork (5).

6. The electric bicycle frame according to claim 1, wherein: be located be equipped with spliced pole (26) on mounting (12) of connecting pipe II (10) tip, rear fork (4) still include last rear fork II (7), the one end of going up rear fork II (7) and the other end fixed connection of riser (2), the other end and spliced pole (26) fixed connection of last rear fork II (7).