TWI661964B - Foldable structure of bicycle - Google Patents

Abstract

The invention relates to a folding structure of a bicycle. The bicycle frame is folded after unlocking. In particular, the bicycle is designed through the inclined surface of the folding joint and the two shells. It can synchronize the original during the folding process. The front and rear wheels on the same line are staggered, so that the bicycle completes the folding of the main skeleton. The front and rear wheels are in a side-by-side state. In this state, it is convenient for users to pull the bicycle. When not riding a bicycle, reduce the volume of the bicycle, reduce the space occupation, and make it easy to carry or store.

Description

Bicycle folding structure

The invention relates to a bicycle, in particular to an innovative design for the field of bicycle folding structure. Through a pair of skewed folding joints, after unlocking, the folding joints can be rotated along the skewed mating surface, The front and rear wheels are folded to the corresponding position to reduce the volume after folding.

Such as TWI385101B Taiwan patent, which discloses a folding frame and folding bicycle. Its folding technology is to fold the rear frame through the first pivot axis through the front frame, and the rear wheel bracket group is rotated relative to the rear frame by the second pivot axis to adjust the relative position of the rear wheel bracket group and the front frame. That is, adjust the relative position of the rear wheel and the front wheel to reduce the volume of the bicycle and facilitate storage. However, after folding the frame, if the frame is to be moved, if the frame is to be moved, the entire frame must be lifted and cannot be moved in the pushing manner, which is quite inconvenient to use.

For example, the Chinese patent case CN104843123B discloses a V-shaped folding bicycle, which is hinged with a bottom bracket through the front fork assembly and the upper end of the rear frame member, and is provided on the bottom bracket to lock the front fork assembly and the rear frame assembly. Or achieve a folding mechanism that rotates relative to each other. That is, the bicycle frame has two folding modes, but the two folding modes are not contiguous, and the first or second folding mode is selected depending on the use situation, and the operation is more complicated.

In Taiwan patent such as TW M399082U, a folding bicycle frame is disclosed, which includes a rear leg, a front frame, and a head. The rear leg has a rear leg and a pivot portion connected to the front of the rear leg. The front frame is provided. Above the rear axle of the rear foot, the front frame is provided with a pivot tube. The pivot pipe is rotatably disposed in the shaft portion to enable the front frame to rotate relative to the rear foot. The front of the vehicle is provided with a quick positioning device for rapid installation. The top of the front end of the front frame allows the rear foot frame and the front frame to be folded into each other. However, the folded front and rear wheels are not parallel or juxtaposed, and have an included angle, so that the folded bicycle cannot be moved in a moving manner, and it can only be moved by lifting the entire frame. It is quite inconvenient to use.

The main object of the present invention is to provide a folding structure for a bicycle. The bicycle frame can be collapsed by unlocking, which can reduce the volume when not riding, reduce the occupation of space, and is convenient to carry or store. In particular, the bicycle is designed with a slanted surface that folds the joints of the two shells of the joint, which can synchronize the front and rear wheels that are originally on the same line during the folding process. Staggered to make the bicycle complete the folding of the main skeleton, the front wheel and the rear wheel are placed side by side, and in this state, it is convenient for users to pull the bicycle.

Another object of the present invention is to enable the front wheels assembled on the front wheel frame to be juxtaposed with the rear wheels after the folding of the main frame is completed regardless of whether the front wheel frame is rotated backward through the handle lever or not.

The object and effect of the present invention are achieved by the following technology: a bicycle folding structure including a main skeleton, a first folding joint, and a front wheel frame, wherein the main skeleton includes a first link, a second link, and the first The first folding joint is provided between a link and the second link, and a front end of the first link is connected to the front wheel frame, and the front wheel frame is mounted with a front wheel. A rear wheel is assembled at the end, and a direction parallel to the axis of the front wheel and the rear wheel is defined as a transverse axis; the first folding joint includes a first shell, a second shell, a toothed member, an elastic body, a push button, and a cam lock member; The first shell is connected to the rear end of the first link, the second shell is connected to the front end of the second link, and the first shell and the second shell are connected by a side wall and along the A shell formed by a ring wall surrounded by a periphery of the side wall, wherein the heights of the ring walls of the first shell and the second shell linearly change and each has a high point and a low point, so that the ring The wall forms a non-constant height wall surface, and the height of the ring wall of the first shell and the wall The low points of the ring walls of the two shells correspond to the low points of the ring walls of the first shell and the high points of the ring walls of the second shell. After the ring walls are docked, the abutting surfaces of the two ring walls are obliquely arranged, and the tooth engagement members are accommodated in a space formed inside the first casing and the second casing after correspondingly covering, The elastic body is arranged between the engaging member and the second housing, and the cam lock member shaft is set to position the first housing, the engaging member, and the second housing, so that the first housing, The teeth engaging member and the second housing are coaxial. The axis of this coaxial axis is the folding shaft of the first folding joint, and an angle is formed between the axial direction of the folding shaft and the transverse axial direction, so that The folding shaft is inclined relative to the transverse axis, and the cam lock is operated to control the tightness of the cover between the first casing and the second casing. The push button is provided with a push rod. The push rod penetrates the inside of the first casing from the outside of the first casing, and abuts against the teeth engaging member. Usually, the teeth engaging member spans the first casing and the second casing. The first butt joint is locked on the mating surface of the first butt joint, and the first folding joint is in a locked state. When the pressing button is pressed, the pusher is pushed by the pusher to the first joint. The two shells move until they are released from the first shell, and the first folding joint is unlocked. When the first folding joint is unlocked, Then, the first folding joint can rotate and fold with its folding axis as an axis. During the folding process, the first and second shells are rotated along the inclined butt joint surface to collapse the main frame. To the front wheels and the rear wheels side by side.

The bicycle folding structure as described above, wherein the outer surface of the first casing is recessed with a receiving groove, the receiving groove is used for receiving the pressing button, and the receiving groove is provided with the perforated pressing button. Putting through.

The bicycle folding structure as described above, wherein the top of the front wheel frame is provided with a handle bar through a second folding joint, and unlocking the second folding joint can fold the handle bar downward and lean against the front wheel frame side.

A folding method of a bicycle. A direction parallel to the central axis of the front wheel and the rear wheel is defined as a transverse axis, and a direction perpendicular to the ground is a longitudinal axis. The main skeleton between the front wheel and the rear wheel has a first folding joint. When the first folding joint is unlocked, the first folding joint rotates and folds with its folding axis as an axis, and an angle between the axial direction and the lateral axis of the folding axis makes the folding axis inclined. It is assumed that after the main skeleton is folded with the folding axis of the first folding joint as an axis, the front wheels and the rear wheels are in a parallel state.

The bicycle folding method as described above, wherein after the folding of the main frame is completed, the handle bar connected to the upper end of the front wheel frame can be further folded, which is through unlocking the handle bar and the front wheel frame. A second folding joint between the two, folding the handle lever downward with the folding shaft of the second folding joint as an axis.

The bicycle folding method as described above, wherein after folding the main skeleton and before folding the handlebars, the front wheel frame assembled at the front end of the main skeleton is used as an axis with the joint with the main skeleton. Turning clockwise (or counterclockwise), the front wheel frame is changed from the direction that originally faces the front to the back, and then the operation of folding the main skeleton is followed.

(1) ‧‧‧Main skeleton

(11) ‧‧‧First connecting rod

(12) ‧‧‧Second link

(2) ‧‧‧First Folding Joint

(21) ‧‧‧First Shell

(211) ‧‧‧Side wall

(212) ‧‧‧Round wall

(213) ‧‧‧Perforation

(214) ‧‧‧Capacity

(22) ‧‧‧Second Shell

(221) ‧‧‧Sidewall

(222) ‧‧‧ Ring

(23) ‧‧‧Toothed pieces

(24) ‧‧‧Elastomer

(25) ‧‧‧Press the button

(251) ‧‧‧Put

(26) ‧‧‧Cam lock

(3) ‧‧‧Front wheel frame

(4) ‧‧‧ front wheel

(5) ‧‧‧ rear wheel

(6) ‧‧‧Second Folding Joint

(61) ‧‧‧Upper seat

(62) ‧‧‧Lower seat

(63) ‧‧‧Unlock Control

(64) ‧‧‧Folded shaft

(7) ‧‧‧Handlebar

(S1) ‧‧‧ Butt Face

(L1) ‧‧‧Transverse axial

(L2) ‧‧‧Folding shaft

(θ) ‧‧‧angle

First image: side view of bicycle disclosed in the present invention

Second image: An exploded perspective view showing the folding structure of a bicycle according to the present invention

Third figure: Exploded top view revealing the folding structure of the bicycle of the present invention

The fourth figure: a top combination view showing the folding structure of the bicycle of the present invention

Fifth image: side view of bicycle disclosed in the present invention

The sixth figure: reveals the state of the bicycle of the present invention after folding the first folding joint

Figure 7: A perspective view showing the relationship between the handlebar, the second folding joint and the front wheel frame of the bicycle of the present invention

Figure 8: A perspective view showing the second folding joint of the bicycle of the present invention

The ninth figure: reveals the state of the bicycle of the present invention after folding the second folding joint

The tenth figure: reveals the three-dimensional state diagram of the bicycle of the present invention after it is completely folded

Figure 11: A side view showing the bicycle of the present invention after it is completely folded

Figure 12: A perspective view illustrating the relationship between the handlebar, the second folding joint and the front wheel frame of another embodiment of the bicycle of the present invention

Figure 13: A perspective view of a rotating handlebar of another embodiment of the bicycle of the present invention

Figure 14: A side view of the folding handlebar of the second folding joint of another embodiment of the bicycle of the present invention

Figure 15: Side view of another embodiment of the bicycle of the present invention after the handlebar is folded

In order to make the technical content, the purpose of the invention, and the effect achieved by the present invention more complete and clear disclosure, it is described in detail below, and please refer to the disclosed figure together Formula and figure number: Please refer to the first to sixth figures.

The bicycle folding structure of the present invention comprises a main skeleton (1), a first folding joint (2), and a front wheel frame (3); wherein: the main skeleton (1) includes a first link (11) and a second link (12) A first folding joint (2) is provided between the first link (11) and the second link (12), and the front end of the first link (11) is connected to the front wheel frame (3) and the front wheel frame (3) ) Is installed with a front wheel (4), a rear wheel (5) is assembled at the rear end of the second link (12), and the direction parallel to the axis of the front wheel (4) and the rear wheel (5) is defined as the transverse axial direction (L1), The direction perpendicular to the ground is the longitudinal axis (H1); the first folding joint (2) includes a first shell (21), a second shell (22), an engaging member (23), an elastic body (24), and a push button ( 25). Cam lock (26); the first housing (21) is connected to the rear end of the first link (11), the second housing (22) is connected to the front end of the second link (12), and the first housing (21) ) Is a shell formed by a side wall (211) and a ring wall (212) ringed along the periphery of the side wall (211), and the ring wall (212) has a high point and a low point, and the high point and The positions between the low points correspond, and the height of the annular wall (212) changes linearly from the high point to the low point, so that the annular wall (212) forms a non-equivalent positive slope. On the wall surface, the second shell (22) is also a shell formed by a side wall (221) and a ring wall (222) that is arranged around the periphery of the side wall (221), and the ring wall (222) also has a The high point corresponds to a low point, and the position between the high point and the low point corresponds to the height of the ring wall (222) changes linearly from the high point to the low point, so that the ring wall (222) forms a non-equal height negative The wall surface is set obliquely. After the first casing (21) and the second casing (22) correspond to each other's ring walls (212) and (222), the ring wall (212) of the first casing (21) The high point corresponds to the low point of the ring wall (222) of the second shell (22), and the low point of the ring wall (212) of the first shell (21) corresponds to the high point of the ring wall (222) of the second shell (22). Make the abutment surface (S1) of the second ring wall (212) and the ring wall (222) obliquely set; the tooth engagement member (23) is accommodated in the first casing (21) and the second casing (22) correspondingly In the space formed by the interior; the elastic body (24) is set between the engaging member (23) and the second casing (22); the pressing button (25) is disposed at the outer side of the first casing (21), and the pressing The button (25) is extended with a push rod (251). The push rod (251) penetrates the inside of the first casing (21) from the outside of the first casing (21) through the perforation (213) on the first casing (21), and Its end is pressed against the tooth engagement member (23); the cam lock member (26) passes through the first housing (21), the tooth engagement member (23) and the second housing (22) coaxially, so that the first housing (21) , The engaging element (23), and the second housing (22) are coaxial, and the axis of this coaxial axis is the folding axis (L2) of the first folding joint (2), and the axial and lateral directions of the folding axis (L2) There is an included angle (θ) between the axial direction (L1), so that the folding shaft (L2) is inclined relative to the transverse axial direction (L1), and the operating cam lock (26) is pulled to penetrate the cam Radius and short radius to control the tightness of the cover between the first shell (21) and the second shell (22), and the normal toothing member (23) corresponds to the first shell (21) and the second shell (22) ) (S1).

When the bicycle is not folded normally (see Figures 2 to 5), the cam lock (26) abuts the outer side of the second casing (22) with the long radius of its cam, so that the first casing (21) and the second casing ( 22) is in a tightly closed state. At this time, the tooth engagement member (23) is supported by the elastic top of the elastic body (24), and is relatively located at the butt joint between the corresponding first shell (21) and the second shell (22). At the surface (S1), the first casing (21) and the second casing (22) are clamped to make the first folding joint (2) in a locked state. At this time, the bicycle is unfolded and fixed and cannot be folded.

When carrying out the folding operation of the main frame (1) of the bicycle (refer to the second to fifth figures), the cam lock member (26) needs to be pulled first so that the cam lock member (26) abuts the second housing by the long radius of its cam ( The outer side of 22) is changed by the short radius of the cam against the outer side of the second casing (22), so that the first casing (21) and the second casing (22) are in a loose state, and then the pressing button ( 25), and the pusher (251) of the push button (25) is used to push the engaging member (23) toward the second housing (22) until the engaging member (23) is completely submerged in the second housing (22) and disengaged After the first shell (21), the first folding joint (2) is unlocked. At this time, the first folding joint (2) can be rotated and folded around its folding axis (L2). During the folding process, the first , Two shells (1), (2) rotate along the inclined abutment surface (S1) to collapse the main frame (1) so that the front wheels (4) and rear wheels (5) are side by side (see the sixth Figure).

It can be known from the above that the present invention can implement a bicycle folding method. After unlocking the first folding joint (2), the method can rotate and fold using the folding axis (L2) of the first folding joint (2) as the axis. Because there is an angle (θ) between the axial direction of the folding axis (L2) and the transverse axial direction (L1), the folding axis (L2) is inclined. When the main skeleton (1) uses the first folding joint (2) The folded shaft (L2) is that after the shaft center is folded, the radial direction of the front wheel (4) and the radial direction of the rear wheel (5) are not on the same plane, and the front wheel (4) and the rear wheel (5) are in a parallel state; The best condition is that the axis of the front wheel (4) is coaxial with the axis of the rear wheel (5). In this folded state, the user can still push the folded bicycle frame through the handlebar (7) set by the second folding joint (6) on the top of the front wheel frame (3) (as shown in Figure 6).示).

See Figures 7 and 8. The second folding joint (6) includes an upper seat body (61), a lower seat body (62), an unlocking control member (63) provided on the first side of the upper seat body (61), and an upper seat body (61) and a lower seat are pivotally arranged. The folded shaft portion (64) on the second side of the body (62); when the unlocking control member (63) is used to lock the first side of the lower seat body (62) (such as the first picture and the seventh picture), the upper seat body can be (61) The lower seat (62) is docked. The user controls the forward direction of the front wheel (4) by controlling the handle lever (7). When the unlocking state of the unlocking control member (63) is released, the handle lever (7) ) Use the folded shaft portion (64) of the second folded joint (6) as the axis to turn down and close (see Figures 9-11).

If you want to store a bicycle, you can further fold the handlebar (7) (see Figures 8 to 11) to fold the bicycle to the minimum volume to reduce space. Among them, after the main skeleton (1) is folded, the front wheel frame (3) assembled at the front end of the main skeleton (1) is rotated clockwise (or counterclockwise) around the assembly point with the main skeleton (1) ( (Refer to the twelfth to fifteenth drawings), the front wheel frame (3) is changed from the original direction toward the front, and then the handle bar (7) connected to the upper end of the front wheel frame (3) is folded, which is unlocked by The second folding joint (6) located between the handle bar (7) and the front wheel frame (3), turning the handle bar (7) with the folding shaft portion (64) of the second folding joint (6) as the axis. Collapse so that the handlebar (7) rests against the side of the front wheel frame (3).

In a preferred embodiment of the present invention, a receiving groove (214) is recessed on the outer surface of the first casing (21), and the receiving groove (214) is used for receiving the pressing button (25), and the receiving groove (214) A perforation (213) is provided for the push rod (251) of the push button (25) to pass through (see the second figure).

The above are only part of the embodiments of the present invention, and are not intended to limit the present invention. Those who are modified according to the creative spirit and characteristics of the present invention should also be included. It is included in the scope of this patent.

In summary, the embodiments of the present invention can indeed achieve the expected use effect, and the specific technical means disclosed have not only been found in similar products, nor have they been disclosed before the application. They have fully complied with the patent law. Regulations and requirements, applying for an invention patent in accordance with the law, and begging for examination and granting the patent, it is a matter of merits.

Claims (6)

A bicycle folding structure includes a main skeleton, a first folding joint, and a front wheel frame. The main skeleton includes a first link and a second link. The first link and the second link are disposed between the first link and the second link. In the first folding joint, the front end of the first link is connected to the front wheel frame, the front wheel frame is mounted with a front wheel, and the rear end of the second link is assembled with a rear wheel, defining a parallel front wheel and a rear wheel axis. The direction is the transverse axis; the first folding joint includes a first shell, a second shell, an engaging member, an elastic body, a push button, and a cam lock; the first shell is connected to the rear of the first link End, the second shell is connected to the front end of the second link, and the first shell and the second shell are both formed by a side wall and a ring wall surrounding the periphery of the side wall The shell, wherein the heights of the ring walls of the first shell and the second shell are linearly changed and each has a high point and a low point, so that the ring wall forms a non-constant wall surface, and the first The high point of the ring wall of a shell corresponds to the low point of the ring wall of the second shell. The low point of the wall corresponds to the high point of the ring wall of the second shell. When the corresponding covers of the first shell and the second shell are brought into abutment with each other, the butt surfaces of the two ring walls are inclined. The teeth engaging member is accommodated in a space formed by the inside of the first casing and the second casing correspondingly closed, and the elastic body is arranged between the teeth engaging member and the second casing The cam lock member shaft is set to position the first housing, the gear engaging member, and the second housing, so that the first housing, the gear engaging member, and the second housing are coaxial. The axis of the shaft is the folding axis of the first folding joint. An angle between the axial direction of the folding shaft and the transverse axial direction makes the folding shaft be inclined relative to the transverse axial direction. The cam locking member controls the tightness of the cover between the first casing and the second casing. The push button is provided with a push rod. The push rod penetrates the first casing from the outside of the first casing. An inside of the shell and abutting against the teeth engaging member, usually the teeth engaging member correspondingly straddles the first housing, the first The abutting surface of the casing is used to clamp the first casing and the second casing, and the first folding joint is in a locked state. After pressing the pressing button, the pusher pushes the engaging member toward the The second casing moves until it detaches from the first casing to unlock the first folding joint. When the first folding joint is unlocked, the first folding joint can be rotated and folded with its folding axis as the axis. During the process, the first and second shells are rotated along the oblique butting surface to collapse the main frame to the front wheels and the rear wheels side by side. The bicycle folding structure according to item 1 of the scope of patent application, wherein the outer surface of the first housing is recessed with a receiving groove, the receiving groove is used for receiving the pressing button, and the receiving groove is provided with a perforation. The push rod for pressing the button is threaded. The bicycle folding structure according to item 1 or 2 of the scope of patent application, wherein the front wheel frame is provided with a handlebar via a second folding joint group, and unlocking the second folding joint can fold the handlebar downward. The combination leans against the side of the front wheel frame. A bicycle folding method, which is used to operate the bicycle folding structure as described in any one of claims 1 to 3, and defines the direction parallel to the central axis of the front wheel and the rear wheel as the lateral axis, and The vertical direction of the ground is the longitudinal axis; the main skeleton between the front wheel and the rear wheel has a first folding joint. When the first folding joint is unlocked, the first folding joint is rotated and folded around its folding axis. There is an angle between the axial direction and the transverse axial direction of the folding shaft, so that the folding shaft is obliquely arranged. After the main skeleton completes the folding with the folding shaft of the first folding joint as the axis, The front wheels are juxtaposed with the rear wheels. The bicycle folding method according to item 4 of the scope of patent application, wherein after the folding of the main skeleton is completed, the handle bar connected to the upper end of the front wheel frame can be further folded, which is located at the handle by unlocking A second folding joint between the lever and the front wheel frame, the handle lever is turned downward and folded with the folding shaft portion of the second folding joint as an axis. The bicycle folding method according to item 4 or 5 of the scope of patent application, wherein after folding the main frame and before folding the handlebar, a front wheel frame assembled at the front end of the main frame is connected with the main frame. The joint of the main skeleton is rotated clockwise (or counterclockwise) on the axis, so that the front wheel frame is changed from the original direction to the front, and then the operation of folding the main skeleton is followed.