CN217477481U - Folding bicycle frame - Google Patents

Abstract

The utility model provides a folding frame, which can be folded for a plurality of times to reduce the volume of a bicycle or an electric bicycle; the front fork penetrates through one end of the first bracket and can rotate at one end of the first bracket; one end of the second bracket is connected with the first bracket through a folder, and the first bracket can be folded along the folder; one end of the folding group is connected with the other end of the second bracket, the other end of the folding group is used for being connected with the rear wheel, and the folding group can be folded towards the position of the first bracket by taking the other end of the second bracket as a basis; the utility model provides a folding frame reduces holistic volume through folding many times to carry out subsequent operations such as carrying or transport.

Description

Folding bicycle frame

Technical Field

The utility model belongs to the technical field of the folding car technique and specifically relates to a folding frame is related to.

Background

The bicycle drives the vehicle to run in a manual mode to increase the running speed, and along with the development of science and technology, the electric bicycle is produced at the same time, and the electric bicycle adopts electric energy as a power source and can increase the running speed, so that the electric bicycle is widely favored;

in the prior art, no matter a bicycle or an electric vehicle, the bicycle or the electric vehicle occupies a large space due to structural limitation, and is inconvenient to carry; therefore, a foldable bicycle or an electric bicycle is provided, the whole volume is reduced in a folding mode, and the occupied space is reduced; however, due to the structural limitation, the bicycle or the electric bicycle in the prior art can only be folded once to reduce the overall volume, but the overall volume is still larger after the folding, and the overall volume cannot be further reduced.

Disclosure of Invention

The utility model aims to provide a folding frame which can be folded for a plurality of times to reduce the volume of a bicycle or an electric bicycle;

the utility model provides a folding frame, including the front fork, still include:

the front fork penetrates through one end of the first bracket and can rotate at one end of the first bracket;

one end of the second bracket is connected with the first bracket through a folder, and the first bracket can be folded along the folder;

folding group, one end is connected with the other end of second support, and the other end is used for being connected with the rear wheel, and folding group can be folded to first support position by the second support other end as the basis.

As a further technical scheme, one end of the first support is provided with a head tube, and the front fork is arranged in the head tube in a penetrating mode.

As a further technical scheme, two ends of the front fork, which are far away from the head pipe, are respectively provided with a hook.

As a further technical solution, the second bracket includes:

one end of the arc tube is connected with the folder;

the stand pipe is connected with the other end of the arc pipe.

As a further technical solution, the second bracket further includes: and one end of the reinforcing pipe is connected with the arc pipe, and the other end of the reinforcing pipe is connected with the vertical pipe.

As a further technical solution, the folding group includes:

the folding device comprises a first folding arm, a second folding arm and a folding piece, wherein one end of the first folding arm is rotatably connected with the folding piece; one end of the folding piece is rotatably connected with the second folding arm; the other end of the first folding arm and the other end of the second folding arm are connected.

As a further technical solution, the first folding arm includes:

one end of the damping section is rotatably connected with the folding piece;

and one end of the vertical fork is connected with the other end of the damping section, and the other end of the vertical fork is connected with the second folding arm.

As a further technical solution, the second folding arm includes:

a support part arranged on the second bracket; one end of the folding piece is rotatably arranged on the supporting part;

one end of the lower fork is rotatably connected with the supporting part, and the other end of the lower fork is connected with the first folding arm.

As a further technical solution, the support portion includes:

the fixing part is arranged on the second bracket;

the rotating platform is arranged on the fixing part, and one end of the folding piece is rotatably connected with the rotating platform.

As a further technical solution, the support portion further includes: and one end of the reinforcing plate is connected with the second support, and the other end of the reinforcing plate is connected with the fixing part.

The technical scheme of the utility model through set up the scray between first support and second support, and the folding group that the cooperation set up, install the front wheel on the front fork of first support in the use stage, install the rear wheel on folding group, and through the operation to folding group respectively, it is folding to the front wheel direction with the rear wheel, through the operation to first support, it is folding to the rear wheel direction with front wheel and first support, reduce holistic volume through folding many times, so that carry out subsequent operations such as carrying or transport.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a foldable frame of the present invention;

fig. 2 is a schematic structural view of a first folding arm in the present invention;

fig. 3 is a schematic structural view of a second folding arm according to the present invention;

FIG. 4 is a schematic view of the folded structure of FIG. 1;

FIG. 5 is a schematic view of the folded structure of FIG. 4;

fig. 6 is a structural view of a first body included in the present invention;

fig. 7 is a side view of a first body encompassed by the present invention;

fig. 8 is a structural view of a second body included in the present invention;

fig. 9 is a side view of a second body encompassed by the present invention;

fig. 10 is a structural view of a folder encompassed by the present invention;

fig. 11 is a side view of an end cap according to the present invention.

Description of reference numerals:

1-a first scaffold; 2-a front fork; 3-a second scaffold; 31-arc tube; 32-a riser; 33-a reinforced tube; 4-a folder; 401. a first body; 402. a second body; 403. a first connection portion; 404. a second connecting portion; 405. an end cap; 406. an internal thread block; 5-folding group; 51-a first folding arm; 511-a damper section; 512-vertical fork; 52-second folding arm; 521-a support portion; 5211-a fixed part; 5212-rotating table; 5213-a reinforcing plate; 5214-first connecting cylinder; 5215-a second connector barrel; 522-lower fork; 53-a fold; 61-a headstock tube; 62-hanging hooks; 7-front wheels; 8-rear wheel; 9-telescopic bolts.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "coupled" are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1-11, the utility model provides a folding bicycle frame, including front fork 2, still include: a first support 1;

the first bracket 1 is an arc tubular structure, and the front fork 2 is arranged at one end of the first bracket 1 in a penetrating way and can rotate at one end of the first bracket 1; specifically, the front fork 2 is arranged on the first bracket 1 in a penetrating way and can rotate at one end of the first bracket 1; wherein, one end of the first bracket 1 is provided with a head tube 61, and the front fork 2 is arranged in the head tube 61 in a penetrating way; as shown in fig. 1, hooks 62 are respectively provided at both ends of the front fork 2 away from the head tube 61; in the utility model, the hook 62 is an independent structure, is manufactured and molded independently, is arranged at two ends of the front fork 2, is used for installing the front wheel 7, and can be disassembled and repaired as required; the disassembly and assembly efficiency is improved;

one end of the second bracket 3 is connected with the first bracket 1 through a folder 4, and the first bracket 1 can be folded along the folder 4; specifically, the second bracket 3 is of an arc-shaped tubular structure, the radian of the second bracket is the same as that of the first bracket 1, and after the second bracket 3 is connected with the first bracket 1 through the folder 4, the structures of the first bracket 1 and the second bracket 3 can be kept consistent, the stress point is reduced, and the stability of the first bracket 1 and the second bracket 3 after connection is improved;

specifically, the folder 4 is configured as shown in fig. 6 to 11, and includes a first main body 401, a second main body 402, a first connection portion 401, a second connection portion 404, and an end cover 405, where the first connection portion 401 is disposed on one side of the first main body 401, the second connection portion 404 is disposed on one side of the second main body 402, through holes with the same inner diameter are disposed in the first connection portion 401 and the second connection portion 404, protrusions are disposed at ends of the first main body 401 and the second main body 402 away from the first connection portion 401, grooves matched with the protrusions are embedded in one side of the end cover 405, and an internal thread block 406 is further disposed in the first main body 401;

in the working process, the first main body 401 and the second main body 402 are respectively connected with the first support 1 and the second support 3, preferably, the first main body 401 and the second main body 402 are respectively inserted into the inner sides of arc pipes included in the first support 1 and the second support 3 and welded, the first connecting portion 401 is inserted into the second connecting portion 404 until the inner walls of through holes included in the two connecting portions vertically coincide, the first connecting portion 401 and the second connecting portion 404 are fixed through pins, and a screw rod penetrates through the end cover 405 and rotates into the internal thread block 406 for connecting the end cover 405 and the first main body 401, so that the first main body 401 and the second main body 402 are connected, when the first main body 401 and the second main body 402 rotate and are attached under the limit of the pins, the arc pipes included in the first support 1 and the second support 3 are positioned on the same extension line, when the end cover 405 rotates until the groove on one side of the end cover 405 is attached to the bulges of the first main body 401 and the second main body 402, the screw rod is rotated to finish the limiting of the positions of the end cover 405 and the bulge, so that the first support 1 and the second support 3 are fixed, and the open welding between the folder 4 and the arc pipes included by the first support 1 and the second support 3 in the using process can be effectively avoided by adopting the connecting mode.

Wherein, the second bracket 3 comprises an arc tube 31 and a stand tube 32, and one end of the arc tube 31 is connected with the folder 4; the stand pipe 32 is connected with the other end of the arc pipe 31; as shown in fig. 1, the arc tube 31 and the stand tube 32 are connected to form an included angle; a saddle and the like are installed through a vertical pipe 32 and are connected with the first bracket 1 through an arc pipe 31;

in order to increase the strength of the second bracket 3, in the present invention, a reinforcing pipe 33 is preferably disposed on the second bracket 3, one end of the reinforcing pipe 33 is connected to the arc pipe 31, and the other end is connected to the stand pipe 32; therefore, the arc tube 31, the stand tube 32 and the reinforcing tube 33 form a structure approaching to a triangle, the force application point is increased, and the strength of the second bracket 3 is increased; in addition, the reinforcing pipe 33 is of an arc-shaped structure, so that the contact area of the reinforcing pipe 33 and the joint of the arc pipe 31 and the stand pipe 32 can be increased, and the connection strength among the arc pipe 31, the stand pipe 32 and the reinforcing pipe 33 can be further increased;

one end of the folding group 5 is connected with the other end of the second bracket 3, the other end of the folding group is used for being connected with the rear wheel 8, and the folding group 5 can be folded towards the position of the first bracket 1 by taking the other end of the second bracket 3 as a basis; the rear wheel 8 is connected to the folding group 5 in the using stage, and the folding group 5 drives the rear wheel 8 to fold through the operation on the folding group 5; the folding operation of the whole is completed by matching with the folding of the first bracket 1;

wherein, the folding group 5 comprises a first folding arm 51, a second folding arm 52 and a folding piece 53, one end of the first folding arm 51 is rotatably connected with the folding piece 53; one end of the folding member 53 is rotatably connected to the second folding arm 52; the other end of the first folding arm 51 and the other end of the second folding arm 52 are connected; as shown in fig. 1, 4 and 5, the folding based on the second support 3 is completed by the operation of the first folding arm 51 and the second folding arm 52; and realizes the folding of the driving rear wheel 8;

as shown in fig. 2 and 3, the first folding arm 51 comprises a shock absorbing section 511 and a seat stay 512 section, wherein one end of the shock absorbing section 511 is rotatably connected with the folding member 53; one end of the vertical fork 512 is rotatably connected with the other end of the damping section 511, and the other end is connected with the second folding arm 52; the second folding arm 52 includes a support portion 521 and a lower fork 522, the support portion 521 being provided on the second bracket 3; and one end of the folder 53 is rotatably provided on the supporting part 521; one end of the lower fork 522 is rotatably connected to the supporting portion 521, and the other end is connected to the first folding arm 51; specifically, one end of the folding member 53 is movably connected to the supporting portion 521, preferably, the folding member 53 is connected to the supporting portion by a pin, so that the folding member 53 can rotate by using the connection position as a shaft; the other end of the folding member 53 is rotatably connected with the first folding arm 51, and in the present invention, the other end is preferably connected with a pin, so that the rotation between the folding member 53 and the first folding arm 51 can be ensured; in the present invention, the damping section 511 can buffer the downward force applied to the first folding arm 51 during the use process, so as to prevent the first folding arm 51 from being damaged by the external force;

in the unfolded state, one end of the folding member 53, which is located below, is fixed to the rotating table 5212, and the other end of the folding member is fixed to the outer wall of the stand pipe 32 through a clamping member, specifically, the clamping member is fixedly mounted at one end, which is located above, of the folding member 53 and is disposed at an angle, and the clamping member is configured to provide a supporting force to the folding member 53, which is perpendicular to the cross section direction of the first folding arm 51, which is close to one end of the stand pipe 32, so that the folding member 53 simultaneously limits the states of the first folding arm 51 and the second folding arm 52, and the first folding arm 51 and the second folding arm 52 are in the unfolded state, as shown in fig. 1; when folding is needed, the folding piece 53 is separated from the extension tube, and the first folding arm 51 and the second folding arm 52 are driven to move, so that the rear wheel 8 moves towards the second support 3, and the folding of the first folding arm 51 and the second folding arm 52 is completed, as shown in fig. 4; then, the first support 1 is folded by operating the folder 4, and the whole folding is completed, as shown in fig. 5; the ends of the first folding arm 51 and the second folding arm 52 away from the folding member 53 are connected by a connecting clip, so that the rear wheel 8 can be mounted by the connecting clip, and the first folding arm 51 and the second folding arm 52 can be ensured to operate simultaneously;

wherein the supporting portion 521 includes a fixing portion 5211 and a rotating table 5212, and the fixing portion 5211 is disposed on the stand pipe 32 included in the second bracket 3; the rotating table 5212 is disposed on the fixing portion 5211, and one end of the folding member 53, which is located below the fixing portion, is rotatably connected to the rotating table 5212; the other end of the fixing portion 5211 is connected to the lower fork 522 by a shaft, so as to ensure that the lower fork 522 can rotate at the other end of the fixing portion 5211; the rotary table 5212 is fixed to the fixing portion 5211 through a bolt, that is, the bolt is screwed to the rotary table 5212 after passing through the fixing portion 5211, and the independent manufacturing and assembly in the subsequent use stage can be performed due to the independence of the rotary table 5212 and the fixing portion 5211;

of course, in order to increase the strength of the supporting portion 521, a reinforcing plate 5213 is preferably provided, and one end of the reinforcing plate 5213 is connected to the second bracket 3 and the other end is connected to the fixing portion 5211; specifically, one end of the reinforcing plate 5213 is fixed to the second bracket 3, and the other end of the reinforcing plate 5213 is abutted to the fixing portion 5211 and can move simultaneously with the fixing portion 5211, that is, the reinforcing plate 5213 is formed by integrally bending a metal plate (steel plate may be used), the bent short plate is welded to the vertical pipe 32, the long plate is in an integral state and contacts with the fixing portion 5211 in the supporting portion 521, when the reinforcing plate 5213 is in an unfolded state, the long plate is stressed and tensioned by the force in the direction of the fixing portion 5211 and simultaneously bears the force borne by the fixing portion 5211 through the reinforcing plate 5213, and when the reinforcing plate 5213 is in a folded state, the force borne by the long plate is reduced due to the change of the angle between the fixing portion 5211 and the vertical pipe 32, so that the long plate is reset; of course, in addition to the reinforcement plate 5213 being able to bear force simultaneously with the fixing portion 5211, the reinforcement plate 5213 will return in the folded state and push the fixing portion 5211 to operate simultaneously during the return, which can reduce the force used by the user during folding, and can improve the efficiency of the fixing portion 5211 during the folding process by virtue of the pushing force of the reinforcement plate 5213;

as shown in fig. 1 and 4, the folding member 53 includes a fixed arm and a rotating arm, and the fixed arm and the rotating arm are integrally formed, and one end of the rotating arm is connected to the fixed portion 5211, and the joint of the fixed arm and the rotating arm is connected to one end of the shock absorbing segment 511, and when in an unfolded state, the other end of the fixed arm is fixed to the extension pipe; the rotating arm is of an arc-shaped structure, so that the action distance of the connecting section of the fixing part 5211 and the lower fork 522 can be increased in the folding process, the folding distance is further increased, and the volume after the whole folding process can be further reduced;

as shown in fig. 3, the fixing portion 5211 further comprises a first connecting barrel 5214 and a second connecting barrel 5215, and the fixing portion 5211 is connected with the second bracket 3 through the first connecting barrel 5214; the lower fork 522 is connected to the fixing portion 5211 through the second connecting cylinder 5215, and in the present invention, an included angle α is formed between the second connecting cylinder 5215 and the lower fork 522 on one side, and an included angle β is formed between the second connecting cylinder 5215 and the lower fork 522 on the other side; wherein α is an acute angle and β is an obtuse angle, so that an included angle also exists between extension lines of the axes of the first connecting cylinder 5214 and the second connecting cylinder 5215, and in addition, in order to avoid the situation that the rear wheel 8 is inclined after being connected, the lengths of the lower fork on one side and the lower fork on the other side are different, so that the balance of the rear wheel 8 can be ensured when the rear wheel 8 is connected; due to the arrangement of the second connecting cylinder 5215, when the folding group 5 is folded, the rear wheel 8, the vertical fork 512 and the lower fork 522 do not contact with the vertical pipe 32, and are positioned on one side of the vertical pipe 32 after being folded, so that the folding distance of the folding group 5 is increased, and the volume after being folded is further reduced;

folding process for the folding group 5: the included angle between the fixing part 5211 and the second connecting barrel 5215 is specifically the angle between the central line of the cross section of the fixing part 5211 and the axis of the 5215 in the direction of the upper surface of the fixing part 5211, and in the using process, because the fixing portions 5211 and 5215 are disposed at an included angle, the folding member 53 and the fixing portion 5211 are rotatably disposed, and the vertical fork 512 and the shock absorbing section 511 are rotatably disposed, and, the damper section 511 is rotatably provided with the folder 53, the fixing portion 5211, the folder 53, the seat stay 512 and the lower stay 522, and the damper section 511 form a four-bar linkage, the working flow of folding the rear wheel from the side of the vertical pipe to the direction of the front wheel is realized by adjusting the angle between the fixing part 5211 and the second connecting cylinder 5215, and through angle calculation, the four-bar mechanism can realize the overlapping state shown in fig. 5 after the rear wheel and the front wheel are folded, so that the volume of the folded frame is further reduced;

as shown in fig. 5, the utility model discloses in still be provided with telescopic bolt 9, this telescopic bolt 9 wears to establish on the seat stay 512, can adjust its length on the seat stay 512, and one end of telescopic bolt 9 is provided with the line hole, like this when setting up the brake cable, can adjust the elasticity of brake cable through the adjustment to telescopic bolt 9, and then improve the efficiency of vehicle brake; in addition, wire passing grooves are formed in the first support and the second support, and used brake wires or speed change wires can be used for conducting wire bunching operation, so that the trend of each wire on the vehicle is restrained.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. A folding frame comprises a front fork (2), and is characterized by further comprising:

the front fork (2) penetrates through one end of the first bracket (1) and can rotate at one end of the first bracket (1);

one end of the second bracket (3) is connected with the first bracket (1) through a folder (4), and the first bracket (1) can be folded along the folder (4);

and one end of the folding group (5) is connected with the other end of the second support (3), the other end of the folding group is used for being connected with a rear wheel (8), and the folding group (5) can be folded towards the position of the first support (1) on the basis of the other end of the second support (3).

2. The folding frame of claim 1, characterized in that one end of the first bracket (1) is provided with a head tube (61), and the front fork (2) is arranged in the head tube (61) in a penetrating way.

3. A folding frame according to claim 2, characterised in that the two ends of the front fork (2) remote from the head tube (61) are provided with a respective hook (62).

4. The folding chassis according to claim 1, characterized in that said second bracket (3) comprises:

one end of the arc tube (31) is connected with the folder (4);

and the stand pipe (32) is connected with the other end of the arc pipe (31).

5. The folding chassis according to claim 4, characterized in that said second bracket (3) further comprises: and one end of the reinforcing pipe (33) is connected with the arc pipe (31), and the other end of the reinforcing pipe is connected with the stand pipe (32).

6. The folding chassis according to claim 1, characterized in that said folding group (5) comprises:

the folding device comprises a first folding arm (51), a second folding arm (52) and a folding piece (53), wherein one end of the first folding arm (51) is rotatably connected with the folding piece (53); one end of the folding piece (53) is rotatably connected with the second folding arm (52); the other end of the first folding arm (51) is connected to the other end of the second folding arm (52).

7. The folding chassis according to claim 6, characterized in that said first folding arm (51) comprises:

a shock absorbing section (511) having one end rotatably connected to the folding member (53);

and one end of the vertical fork (512) is connected with the other end of the damping section (511), and the other end of the vertical fork is connected with the second folding arm (52).

8. The folding frame of claim 6, characterized in that said second folding arm (52) comprises:

a support portion (521) provided on the second bracket (3); one end of the folding piece (53) is rotatably arranged on the supporting part (521);

and a lower fork (522) with one end rotatably connected with the support part (521) and the other end connected with the first folding arm (51).

9. The folding frame of claim 8, characterized in that said support portion (521) comprises:

a fixing portion (5211) provided on the second bracket (3);

and a rotating table (5212) which is provided on the fixing portion (5211) and to which one end of the folding piece (53) is rotatably connected.

10. The folding frame of claim 9, characterized in that said support portion (521) further comprises: and a reinforcing plate (5213) having one end connected to the second bracket (3) and the other end connected to the fixing portion (5211).

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