KR20120119358A - Folding type bicycle - Google Patents

Abstract

PURPOSE: A foldable bicycle is provided to discover the defect of products beforehand because the products can be tested by a sub assembly before being completed by having a sub assembly, thereby preventing the failure of the products. CONSTITUTION: A foldable bicycle comprises a frame with a rear frame. The rear frame is connected to a rear wheel(80) and comprises a rear wheel coupling part(42) and a third connection part(43). The rear wheel coupling part is connected to the rear wheel. The third connection part is detachably coupled to the rear wheel coupling part. The rear wheel coupling part is separated from the third connection part to make one assembly with the rear wheel.

Description

Folding bike {FOLDING TYPE BICYCLE}

The present invention relates to a bicycle, and more particularly to a bicycle that can be folded for convenient storage and transportation.

Bicycles are widely used for sports or hobbies as one of the short distance transport means.

In general, a bicycle is composed of a frame forming the skeleton of the bicycle, wheels, pedals, handles and the like mounted on the frame.

However, such a conventional bicycle has a problem that the storage and transportation is inconvenient because the frame is formed integrally, in order to solve this problem, a bicycle having a structure that can be folded in recent years has been developed.

One side is to provide a folding bicycle with an improved structure of the rear frame.

The other side is to provide a folding bicycle with an improved structure of the center frame.

The other side is to provide a folding bicycle with improved reinforcement structure of the center frame and saddle frame.

According to one aspect of the present invention, a folding bicycle having a frame includes a rear wheel coupling portion connected to a rear wheel, and the rear wheel coupling portion is coupled to the body to form a predetermined accommodation space. And a plurality of electronic components provided in the predetermined accommodation space, wherein at least one of the plurality of electronic components is attached to the cover.

In addition, the cover is characterized in that formed of a metallic material.

In addition, the cover is characterized in that formed of aluminum.

In addition, the other one of the plurality of electronic components is characterized in that attached to the body.

In addition, the body is characterized in that formed of a metallic material.

In addition, the body is characterized in that formed of aluminum.

In addition, the electronic component attached to the cover is characterized in that it comprises a regulator (Regulator).

In addition, the electronic component attached to the body is characterized in that it comprises an electronic control unit (ECU).

On the other hand, in the folding bicycle having a frame according to another technical idea, the frame includes a rear wheel coupling portion which is connected to the rear wheel, the rear wheel coupling portion, the body; and the body to form the predetermined receiving space And at least one electronic component provided in the accommodation space, wherein the at least one electronic component is attached to the cover.

The at least one electronic component may include a regulator, and the cover may be formed of an aluminum material.

On the other hand, in the folding bicycle having a frame according to another technical idea, the frame includes a rear frame connected to the rear wheel, the rear frame is a rear wheel coupling portion connected to the rear wheel; and detachable from the rear wheel coupling portion And a third connecting portion, wherein the rear wheel coupling portion of the rear frame is separated from the third connecting portion to form an assembly with the rear wheel.

In addition, the rear wheel coupling portion and the third connection portion is characterized in that it comprises a bolt coupling structure.

In addition, a sealing member is provided between the rear wheel coupling portion and the third connection portion.

In addition, the third connecting portion is formed of a carbon material, and the rear wheel coupling portion is formed of an aluminum material.

In addition, the rear wheel coupling portion is characterized in that a plurality of electronic components are provided.

In addition, the plurality of electronic components may include a regulator and an electronic control unit (ECU).

On the other hand, the folding bicycle according to another technical idea includes a rear wheel; and a rear frame for supporting the rear wheel, the rear frame is a first portion located far from the rear wheel, and the first position located close to the rear wheel It includes two parts, the second portion of the rear frame is provided detachably from the first portion of the rear frame, characterized in that to form one assembly with the rear wheel.

On the other hand, the folding bicycle according to another technical idea is a rear wheel having a motor; and a rear frame for supporting the rear wheel; and an electronic control unit provided in the rear wheel coupling portion and electrically connected to the motor; and the electronic control unit And a regulator electrically connected to the battery, wherein the electronic control unit is provided closer to the motor than the regulator.

The rear frame may include a third connection part provided with the battery and a rear wheel coupling part provided with the electronic control unit and a regulator, and the rear wheel coupling part may include a body and a cover, and the electronic control unit includes the body. It is disposed close to the side, characterized in that the regulator is disposed close to the cover side.

In addition, the rear wheel coupling portion; spaced apart from the body to support the electronic control unit; characterized in that it comprises a.

In addition, the third connection portion is provided with a carbon material, the rear wheel coupling portion is characterized in that the aluminum material.

On the other hand, the folding bicycle according to another technical idea is a rear wheel having a motor; and a rear frame for supporting the rear wheel; and an electronic control unit provided in the rear frame and electrically connected to the motor; and the electronic control unit electrically A battery connected to the battery; and a regulator electrically connected to the battery, wherein the electronic control unit is disposed close to the position where the motor is located, and the regulator is disposed far from the position where the motor is located. It is done.

And a first wire connecting the motor and the electronic control unit, a second wire connecting the electronic control unit and the battery, and a third wire connecting the regulator and the battery. The electric wire, the second electric wire and the third electric wire do not cross each other.

On the other hand, the folding bicycle according to another technical idea includes a center frame; and a generator connected to the center frame; and a pedal for driving the generator, the frame is integrally formed by the housing and the insert molding of the generator It is characterized by.

In addition, the generator housing is characterized in that it is formed in a hollow shape.

In addition, the generator is characterized in that it is inserted into the housing of the generator.

In addition, the generator and the housing of the generator is characterized in that the bolting coupling.

In addition, the bolting coupling is characterized in that a plurality is provided along the circumference of the housing of the generator.

On the other hand, the folding bicycle according to another technical idea includes a pedal; and a generator for generating electric power by the pedal; and a center frame for supporting the generator; The center frame of the generator for receiving and supporting the generator It characterized in that it comprises a housing.

In addition, the housing of the generator is characterized in that formed integrally by the frame and the insert molding.

In addition, the generator housing and the frame is characterized in that formed of carbon material.

On the other hand, in the folding bicycle having a frame according to another technical idea, the frame includes a rear wheel coupling portion for coupling with the rear wheel, the rear wheel coupling portion, the body; and includes a cover for coupling with the body, The rear wheel is disposed on one side of the body, and the cover is disposed on the other side of the body.

In addition, the cover is characterized in that it is provided so as not to interfere with the rear wheel.

In addition, a sealing member is provided between the body and the cover.

In addition, the body and the cover is characterized in that the bolting coupling.

On the other hand, the folding bicycle according to another technical idea includes a rear wheel having a motor; and a rear wheel coupling portion for rotatably supporting the motor; wherein the rear wheel coupling portion, the body; and a cover detachable to the body; includes And, the cover is characterized in that the removable from the body in a position that does not interfere with the rear wheel.

On the other hand, in the folding bicycle having a frame according to another technical idea, the frame extends to one side from the hinge plate; and the hinge plate, the center frame on which the pedal is mounted; and extends to the other side from the hinge plate And a saddle frame on which the saddle is mounted, wherein a reinforcing member connecting the center frame and the saddle frame is provided between the center frame and the saddle frame.

In addition, the reinforcing member is characterized in that it is formed in a shape protruding from the hinge plate.

In addition, the center frame and the saddle frame is characterized in that formed integrally through the hinge plate.

In addition, the reinforcing member is characterized in that formed integrally with the center frame, the saddle frame and the hinge plate.

In addition, the reinforcing member is characterized in that the center frame, the saddle frame and the hinge plate is formed of a carbon material.

The foldable bicycle according to an embodiment may easily discharge heat generated from an electronic component to the outside by improving heat transfer performance.

In addition, the subassembly can be configured and tested in the pre-finished stage, so that defects can be found in advance to prevent product defects.

In addition, since the cover does not interfere with the rear wheel when the cover is attached or detached, the cover may be opened to provide services for electronic components embedded in the rear wheel coupling unit.

In addition, by minimizing the wiring distance between the electronic control unit and the motor, the wiring structure can be simplified, safety accidents can be prevented, and unnecessary wire waste can be prevented.

In addition, by insert molding the housing of the generator can solve the crack problem, it is possible to reduce the assembly labor when mounting the generator. And because it is formed of a carbon material can reduce the weight.

In addition, by reinforcing the strength of the center frame and the saddle frame there is an effect that can firmly support the load of the driver.

1 is a perspective view of a folding bicycle according to one embodiment.
2 is a side view of the folding bicycle according to one embodiment.
3 is a plan view of a folding bicycle according to one embodiment.
4 is a perspective view showing an exploded view of the frame constituting the folding bicycle according to an embodiment.
5 is a plan view showing an exploded view of the frame constituting the folding bicycle according to an embodiment.
6 is a perspective view illustrating a folded state of a folding bicycle according to one embodiment;
7 is an exploded perspective view illustrating a rear frame and a rear wheel of a foldable bicycle according to one embodiment.
8 is a view showing a coupling state of the electronic control unit and the regulator of the folding bicycle according to an embodiment.
9 is a view showing the main wiring structure of the folding bicycle according to an embodiment.
10 is an exploded view of the center frame and the generator of the folding bicycle according to another embodiment.
11 is a view showing the reinforcement structure of the center frame and the saddle frame of a folding bicycle according to another embodiment.

Hereinafter, a folding bicycle according to an embodiment will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a folding bicycle according to an embodiment, FIG. 2 is a side view of a folding bicycle according to an embodiment, FIG. 3 is a plan view of a folding bicycle according to an embodiment, and FIG. 4 is according to an embodiment. 5 is a perspective view illustrating an exploded view of a frame constituting a folding bicycle, and FIG. 5 is a plan view illustrating an exploded view of a frame constituting a folding bicycle, and FIG. 6 is a folding bike according to an embodiment. A perspective view showing a state.

1 to 6, the folding bicycle may include a frame 1, a handle assembly 60, a front wheel 70, a rear wheel 80, a power generation unit 90, and a controller.

The frame 1 may include a front frame 10, a center frame 20, a saddle frame 30, and a rear frame 40.

The front frame 10 may include a first hinge plate 11 and a handle coupling portion 12, and a first connecting portion 13 connecting them.

The first hinge plate 11 is formed in a substantially circular shape, and is bent at an angle α of 5 to 20 degrees at the first connecting portion 13. A first reinforcing rib 14 is provided inside the first hinge plate 11 for reinforcing strength, and a first shaft coupling hole may be coupled to the hinge shaft 50 at the center of the first reinforcing rib 14. 15) is formed.

Handle coupling portion 12 is formed in a substantially cylindrical shape. A bearing (not shown) is mounted on an inner circumferential surface of the handle coupling part 12, and the handle stay 61 is inserted into and supported by the handle coupling part 12 to rotate.

The hand assembly 60 may include a handle stay 61 and a handle part 62.

The handle stay 61 connects the handle part 62 and the front wheel 70 to the front frame 10. The upper end of the handle stay 61 is coupled to the handle portion 62, the lower end is coupled to the front wheel (70).

The handle part 62 may include a handle frame 63, a handle bar 64, and a handle grip 65.

The handle frame 63 is formed in a circular rod shape, one end of which is connected to the handlestay 61, and the other end thereof is connected to the handlebar 64. In particular, the handle frame 63 is connected to the handle stay 61 through the first hinge portion 67, the handle frame 63 can be folded to rotate around the first hinge portion (67).

The user can adjust the driving direction of the bicycle by adjusting the handle grip (65).

In addition, the handle grip 65 is provided with a brake lever 66, the user can operate the brake lever 66 to stop the bicycle.

In addition, the handle grip 65 may be provided with an adjusting unit 101. The user can adjust the stepping power through the generator 91 by controlling the adjustment unit 101, it is possible to adjust the output of the motor 83. The adjusting unit 101 is electrically connected to the electronic control unit 102.

The center frame 20 may include a second hinge plate 21, a generator coupling part 22, and a second connecting part 23 connecting them.

The second hinge plate 21 is provided in a substantially circular shape, and is bent at a predetermined angle at the second connecting portion 23. The second reinforcing rib 24 is provided inside the second hinge plate 21 for reinforcing strength, and the second shaft coupling hole may be coupled to the hinge shaft 50 at the center of the second reinforcing rib 24. 25 is formed.

The generator coupling part 22 is provided at the lower end of the second connection part 23 and is provided to allow the generator 91 to be mounted.

The saddle frame 30 may include a second hinge plate 21, a saddle coupling part 32, and a third connection part 33 connecting them. Here, the second hinge plate 21 of the saddle frame 30 is the same as the second hinge plate 21 of the center frame 20. That is, the saddle frame 30 and the center frame 20 share the second hinge plate 21, and they are integrally formed.

The second hinge plate 21 is provided to be bent at an angle β of 5 to 20 degrees at the third connecting portion 33. The second reinforcing ribs 24 and the second shaft coupling holes 25 are as described above.

Saddle coupling portion 32 is provided in a cylindrical shape. The saddle coupling part 32 receives the auxiliary saddle frame 30 to guide the auxiliary saddle frame 30 to move in the vertical direction.

Auxiliary saddle frame 30 is inserted into the saddle coupling portion 32, the saddle 34 is coupled to the upper end. The user may adjust the height of the saddle 34 by moving the auxiliary saddle frame 30 in the vertical direction. In addition, when the user sits on the saddle 34, a tightening device (not shown) may be provided to prevent the auxiliary saddle frame 30 from falling down due to the load.

The rear frame 40 may include a third hinge plate 41 and a rear wheel coupling portion 42, and a fourth connecting portion 43 connecting them.

The third hinge plate 41 is provided in a substantially circular shape, and is formed to be bent at an angle γ of 5 to 20 degrees at the fourth connection portion 43. A third reinforcing rib 44 is provided inside the third hinge plate 41 for reinforcing strength, and a third shaft coupling hole is provided at the center of the third reinforcing rib 44 to allow the hinge shaft 50 to be coupled thereto. 45 is formed.

The rear wheel coupling portion 42 rotatably supports the rear wheel 80. The rear wheel 80 is equipped with a motor 83 having a transmission structure for rotating the rear wheel 80 to advance the bicycle.

Meanwhile, the front frame 10, the center frame 20, the saddle frame 30, and the rear frame 40 are provided to be rotatable with respect to the hinge axis 50.

The hinge shaft 50 pivotally connects the first hinge plate 11, the second hinge plate 21, and the third hinge plate 41 about one axis. That is, the hinge shaft 50 sequentially passes through the first shaft coupling hole 15, the second shaft coupling hole 25, and the third shaft coupling hole 45 to be coupled to the tightening unit 51.

A fixing unit 52 is provided between the third hinge plate 41 and the tightening unit 51. The fixing unit 52 fixes the first hinge plate 11, the second hinge plate 21, and the third hinge plate 41 to each other or releases the fixed state. The user rotates the fixing unit 52 to one side in an unfolded state of the bicycle so that the first hinge plate 11, the second hinge plate 21, and the third hinge plate 41 closely adhere to each other so that the frame 1 is close to each other. In order to maintain the unfolded state and to fold the bicycle, the fixing unit 52 is rotated to the other side to release the binding between the first hinge plate 11, the second hinge plate 21, and the third hinge plate 41. So that the frame 1 can be folded. As described above, the folding or unfolding of the bicycle is described in detail in Korean Patent Application No. 2010-0089775 filed by the applicant of September 14, 2010, and a detailed description thereof will be omitted.

The power generation unit 90 may include a generator 91, a pedal 92, and a main battery 93.

The generator 91 is mounted to the generator coupling unit 22 and coupled to the pedal 92 on a rotating shaft (not shown) of the generator 91. When the user rotates the pedal 92, the rotational force of the pedal 92 is converted into electrical energy in the generator 91, and the electrical energy is stored in the main battery 93. On the other hand, the user may receive a stepping force by the generator 91 when rotating the pedal 92.

The control unit may include a control unit 101 and an electronic control unit (ECU) 102. The adjusting unit 101 is electrically connected to the electronic control unit 102.

The electronic control unit 102 is electrically connected to the generator 91, the user can control the stepping power through the generator 91 by adjusting the adjustment unit 101. For example, when the power of the generator 91 is increased, it is difficult for the user to roll the pedal 92, and when the power is reduced, the user can easily rotate the pedal.

In addition, the electronic control unit 102 is electrically connected to the motor 83, the user can control the output of the motor 83 by adjusting the adjustment unit 101. For example, when the output of the motor 83 is increased, the speed of the bicycle is increased, and when the output is lowered, the speed of the bicycle is slowed.

7 is an exploded perspective view illustrating a rear frame and a rear wheel of a folding bicycle according to an embodiment, and FIG. 8 is a view illustrating a coupling state of an electronic control unit and a regulator of the folding bicycle according to an embodiment.

1 to 8, the rear frame 40 includes a third hinge plate 41, a rear wheel coupling portion 42, and a third connecting portion 43 connecting them.

The rear wheel coupling portion 42 may include a body 42a and a cover 42b.

The cover 42b is provided detachably to the body 42a. The cover 42b and the body 42a are provided with a bolt coupling structure. The cover 42b is disposed so as not to interfere with the rear wheel 80 when the cover 42b is attached to or detached from the body 42a. The user may fasten or release the bolt B1 without interference of the rear wheel 80 in the side of the bicycle.

The cover 42b is combined with the body 42a to form a predetermined accommodation space. Electronic components are installed in this space. In one example, the electronic control unit 102 is installed on the body 42a side, and the regulator 103 is installed on the cover 42b side. The electronic control unit 102 may be provided inside the body 42a by a separate spacer 46.

The cover 42b and the body 42a are made of a metal material. Specifically, it is formed of aluminum. Since heat is generated in the electronic control unit 102 and the regulator 103, the materials of the cover 42b and the body 42a are made of metal in order to release heat to the outside. In addition, in order to increase the heat transfer performance, the electronic control unit 102 is separately attached to the metal body 42a side for rapid heat transfer, and the regulator 103 is separately attached to the metal cover 42b side. To ensure rapid heat transfer. When the electronic control unit 102 is supported by the spacer member 46, the spacer member 46 may be formed of a metal material to increase heat transfer efficiency.

The sealing member 42c is provided between the cover 42b and the body 42a. The sealing member 42c removes a gap between the cover 42b and the body 42a to prevent the inflow of foreign substances. As a result, the internal electronic components can be protected.

The body 42a includes a motor support 42d for rotatably supporting the motor 83. The motor shaft 83a is inserted into the motor support 42d. The end of the motor shaft 83a is engaged with the release preventing nut 47 so that the motor shaft 83a does not fall out of the motor support part 42d.

The fourth connector 43 is provided in the shape of a hollow tetrahedron. The main battery 93 is embedded in the third shaft coupling hole 43.

The fourth connecting portion 43 is provided detachably to the rear wheel coupling portion 42. A bolt coupling structure is provided at the fourth connection portion 43 and the rear wheel coupling portion 42. The user may fasten or release the bolt B2 to connect or disconnect the rear wheel coupling portion 42 to the third shaft coupling hole 43. The rear wheel coupling portion 42 is separated from the fourth connecting portion 43 to form an assembly together with the rear wheel 80. At this time, since the electronic component is installed in the rear wheel coupling portion 42, the operation of the rear wheel 80 can be tested or measured in the step before the finished product.

A sealing member 42c is provided between the fourth connecting portion 43 and the rear wheel coupling portion 42, and the sealing member 42c is a foreign matter in the coupling gap between the fourth connecting portion 43 and the rear wheel coupling portion 42. Prevent ingress;

In addition, the fourth connector 43 is made of carbon material. The fourth connector 43 is formed of a carbon material together with the third hinge plate 41 and is integrally formed by inter molding.

Meanwhile, the rear wheel 80 may include a wheel frame 81, a tire 82, a motor 83, and a brake unit 84. The brake unit 84 is composed of a disk 85 and a pad 86. The disk 85 is installed on the motor 83 side, and the pad 86 is attached to the body 42a of the rear wheel engaging portion 42. Is installed.

Hereinafter, the main wiring structure of the folding bicycle will be described in detail.

9 is a view showing the main wiring structure of the folding bicycle according to an embodiment.

As shown in FIGS. 1 to 9, the first wire 111 electrically connects the motor 83 and the electronic control unit 102. Since the electronic control unit 102 is electrically connected to the adjusting unit 101, the user can control the electronic control unit 102 by adjusting the adjusting unit 101.

The second wire 112 electrically connects the electronic control unit 102 and the main battery 93. The main battery 93 may supply power for the electronic control unit 102 to operate, and supply power to the motor 83.

The third wire 113 electrically connects the regulator 103 and the main battery 93, and the fourth wire 114 electrically connects the regulator 103 and the generator 91. The electrical energy generated by the generator 91 is stored in the main battery 93 via the regulator 103.

In particular, since the electronic control unit 102 is coupled to the body 42a side of the rear wheel coupling portion 42, and the regulator 103 is coupled to the cover 42b side of the rear wheel coupling portion 42, the electronic control unit ( 102 is disposed close to the direction in which the motor 83 is located, and the regulator 103 is disposed far from where the motor 83 is located. Accordingly, the first wire 111 and the second wire 112 connecting the motor 83, the electronic control unit 102, and the main battery 93 form one line on the body 42a side, and a regulator ( The third wire 113 connecting the 103 and the main battery 93 forms one line on the cover 42b side.

By such a wiring structure, the first electric wire 111, the second electric wire 112, and the third electric wire 113 do not cross each other and are wired to prevent safety accidents. In addition, since the wiring structure is simplified, there is an advantage that the assembly and management of the electronic components are convenient.

10 is an exploded view of the center frame and the generator of the folding bicycle according to another embodiment.

As shown in Figures 1 to 10, the generator 91 is mounted to the center frame (1). The lower portion of the center frame 1 is provided with a generator coupling portion 22 on which the generator 91 is mounted. The center frame 1 and the generator coupling part 22 are formed of carbon, and are integrally formed by insert molding.

The generator coupling portion 22 is formed of a hollow housing. The generator 91 is housed in the hollow housing. The generator 91 and the generator coupling part 22 (or the housing of the generator) are formed with a bolt coupling structure. The bolt coupling structure is formed in plural along the circumference of the generator 91 and the housing 22 of the generator. When the user is rolling the pedal 92, when the shock is transmitted to the housing 22 of the generator, the generator housing 22 may be formed in a substantially circular shape to distribute the stress.

11 is a view showing the reinforcement structure of the center frame and the saddle frame of a folding bicycle according to another embodiment.

1 to 11, the center frame 20 and the saddle frame 30 share a second hinge plate 21. Since the saddle frame 30 directly supports the load of the driver, a bending moment is greatly generated at the connection portion between the second hinge plate 21 and the saddle frame 30. Accordingly, the reinforcing member 120 is installed to prevent the second hinge plate 21 cracks.

The reinforcement member 120 is provided between the center frame 20 and the saddle frame 30. The reinforcing member 120 directly connects the center frame 20 and the saddle frame 30. Since the saddle frame 30 is supported by the reinforcing member 120, the bending moments applied to the connection portion between the second hinge plate 21 and the saddle frame 30 are dispersed.

In addition, the reinforcing member 120 reinforces the strength by increasing the thickness of the second hinge plate (21). The reinforcing member 120 is formed to protrude from the second hinge plate 21. That is, the reinforcing member 120 is formed to have a structure filling the valley portion between the center frame 20 and the saddle frame 30.

The center frame 20, the saddle frame 30, and the reinforcing member 120 are formed of carbon and integrally formed. The integrated center frame 20, the saddle frame 30, and the reinforcing member 120 may increase strength.

10: front frame 20: center frame
30: saddle frame 40: rear frame
50: hinge axis 60: handle assembly
70: front wheel 80: rear wheel
90: power generation unit 120: reinforcing member

Claims (7)

In the folding bicycle having a frame,
The frame includes a rear frame connected to the rear wheels,
The rear frame includes a rear wheel coupling portion connected to the rear wheel; and a third connecting portion detachable from the rear wheel coupling portion.
The rear wheel coupling portion of the rear frame is separated from the third connecting portion folding bike, characterized in that to form an assembly with the rear wheel. The method of claim 1,
The rear wheel coupling portion and the third connection portion folding bike, characterized in that it comprises a bolt coupling structure. The method of claim 1,
Folding bicycle, characterized in that the sealing member is provided between the rear wheel coupling portion and the third connecting portion. The method of claim 1,
The third connecting portion is formed of a carbon material, and the rear wheel coupling portion is characterized in that the folding bicycle is formed of an aluminum material. The method of claim 1,
The rear wheel coupling portion is a folding bike, characterized in that a plurality of electronic components are provided. The method of claim 5,
The plurality of electronic components are a folding bike, characterized in that it comprises a regulator (Regulator) and an electronic control unit (ECU). Rear wheel; and
It includes; a rear frame for supporting the rear wheel,
The rear frame includes a first portion located far from the rear wheel, and a second portion located close to the rear wheel,
The second portion of the rear frame is detachably provided in the first portion of the rear frame, folding bike, characterized in that to form an assembly with the rear wheel.

Images