CN215922441U

CN215922441U - Improved folding bicycle frame

Info

Publication number: CN215922441U
Application number: CN202120321626.8U
Authority: CN
Inventors: 周铭恩; 唐志勇; 饶雅杰
Original assignee: Giant Kunshan Co ltd
Current assignee: Giant Kunshan Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-03-01
Anticipated expiration: 2031-02-04

Abstract

An improved foldable bicycle frame is composed of an upper tube with two ends fixed between central tube and head tube, a lower tube with one end fixed to the middle of said upper tube and another end connected to lower fork connector, a rotary axle for fixing said lower tube to the end of said lower fork connector, and a middle tube with bottom end movably supported by said lower fork connector for allowing the lower fork connector to be longitudinally folded with the lower fork of bicycle frame, and a locking mechanism between said lower fork connector and lower tube for preventing the rotation of bicycle frame, the folding bicycle frame is ingenious in design, the bicycle frame is longitudinally folded, the size is very small after the folding, and the occupied space is greatly saved.

Description

Improved folding bicycle frame

Technical Field

The utility model relates to a bicycle frame, in particular to an improved folding bicycle frame.

Background

Most of the bicycles can not be folded at present, and the occupied space is larger when the bicycles are parked. Foldable bicycles in the market generally adopt transverse folding, folding joints are generally positioned in one or more lower tubes, upper tubes, seat tubes and head tubes or steering tubes of a bicycle frame, and a folding mechanism of the foldable bicycle can achieve a certain folding effect; however, the folding mechanism still has a large volume after being folded, occupies a large space and is not beneficial to storage.

Disclosure of Invention

In order to make up for the defects, the utility model designs the improved folding bicycle frame, the bicycle has simple structure and ingenious design, the frame is longitudinally folded, the volume is very small after the frame is folded, and the occupied space is greatly saved.

The technical scheme of the utility model is realized as follows: an improved folding bicycle frame comprises an upper tube with two ends fixed between a middle tube and a head tube, and a lower tube with one end fixed in the middle of the upper tube and the other end connected with a lower fork connecting piece, wherein the corresponding end of the lower tube and the lower fork connecting piece is rotationally fixed through a rotating shaft, the bottom end of the middle tube can be movably supported on the lower fork connecting piece, the lower fork connecting piece is convenient to be connected with a bicycle frame lower fork to be longitudinally rotationally folded, when the lower fork connecting piece is connected with the bicycle frame lower fork to be longitudinally rotationally folded,

the lower fork connecting piece and the corresponding wheel of the head tube can be aligned and overlapped, an upper tube folding mechanism is arranged on the upper tube part between the middle tube and the lower tube, so that the upper tube and the middle tube fixing part can be conveniently rotated and folded, and a locking mechanism capable of preventing the frame from rotating when being opened is further arranged between the lower fork connecting piece and the lower tube.

As a further improvement of the utility model, the upper tube folding mechanism is a side edge rotating folding head, and the upper tube part connected with the middle tube can be tightly attached to the lower tube when the upper tube part is folded along the side edge in a rotating way.

As a further improvement of the present invention, the upper tube folding mechanism is a horizontal rotary folding head, and when the upper tube portion connected to the middle tube is folded in a horizontal rotary manner, the upper tube portion connected to the middle tube can be attached to the upper tube portion connected to the head tube in a horizontal rotary manner.

As a further improvement of the present invention, the upper tube folding mechanism is a longitudinal rotation folding head, and when the upper tube portion connected with the middle tube is folded in a longitudinal rotation manner, the upper tube portion connected with the middle tube can be attached to the upper tube portion connected with the head tube in a longitudinal rotation manner.

As a further improvement of the utility model, the locking mechanism is as follows: the lower fork connecting piece forms a U-shaped end (the corresponding end of the lower pipe forms a lower pipe forging piece which can extend into the U-shaped end, the lower pipe forging piece and the lower fork are convenient to connect and are fixed in a rotating mode through the rotating shaft, and the U-shaped end and the bottom end of the lower pipe forging piece are respectively provided with a clamping groove and a buckle which are convenient to clamp and fix.

As a further improvement of the utility model, the lower end of the middle tube is fixed with an elastic body which is convenient to be movably supported on the corresponding concave part on the lower fork connecting piece.

The beneficial technical effects of the utility model are as follows: the improved folding bicycle frame comprises an upper tube, two ends of which are fixed between a middle tube and a head tube, and a lower tube, one end of which is fixed in the middle of the upper tube and the other end of which is connected with a lower fork connecting piece, wherein the lower tube is rotationally fixed with the corresponding end of the lower fork connecting piece through a rotating shaft, the bottom end of the middle tube is movably supported on the lower fork connecting piece, an upper tube folding mechanism is arranged on the upper tube part between the middle tube and the lower tube, so that the upper tube and the fixed part of the middle tube can be conveniently rotationally folded, a locking mechanism which can prevent the lower tube from rotating when the bicycle frame is unfolded is also arranged between the lower fork connecting piece and the lower tube, thus the lower fork connecting piece and the bicycle frame lower fork can be longitudinally rotationally folded, namely longitudinally rotate around the middle tube, the upper tube, the lower tube and the head tube (and a front wheel), the folding of the front wheel and the rear wheel is realized, in order to further reduce the folding space, an upper tube folding mechanism is arranged on the upper tube part between the middle tube and the lower tube, therefore, the upper pipe and the middle pipe fixing part (including the cushion part) are rotated and folded, the space is further reduced, and the storage is convenient.

Furthermore, this upper tube folding mechanism can be folded along the side, and this upper tube part of being convenient for can paste this low tube tightly, also can be along vertical rotation folding (or along horizontal rotation folding), and the upper tube part of being convenient for connect well pipe pastes the upper tube part of tightly connecting the car head pipe.

Further, the locking mechanism is: this lower fork connecting piece forms U type end (and this low tube corresponds the end and forms the low tube forging that can stretch into this U type and hold the interior, be convenient for this low tube forging and should fork down and be connected and rotate fixedly through this pivot, this U type end is equipped with the draw-in groove and the buckle of being convenient for card income fixed respectively with this low tube forging bottom, like this when opening folding frame, draw-in groove on this U type is held to the kelly card income on this low tube bottom, and well tube bottom's elastomer movable support is at this lower fork connecting piece concave part, the locking is realized with the lower fork connecting piece to the low tube, prevent rotating.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a front view of the present invention in the configuration when the locking mechanism is unlocked (rotated longitudinally);

FIG. 3 is a perspective view of the structure of the present invention;

FIG. 4 is a front view of the first embodiment of the present invention (with the folding head rotated to open the side);

FIG. 5 is a perspective view of the second embodiment of the present invention (opening the horizontal rotary folding head);

FIG. 6 is a perspective view of another structure of a second embodiment of the present invention;

FIG. 7 is a perspective view of the third embodiment of the present invention (opening the longitudinally rotatable folding head);

FIG. 8 is a perspective view of another structure of a third embodiment of the present invention;

FIG. 9 is a schematic view of the locking mechanism of the present invention when it is open;

fig. 10 is a schematic view of the locking mechanism according to the present invention when engaged.

The following supplementary description is made with reference to the accompanying drawings:

1-middle tube 6-lower tube

12-elastomer 61-lower tube forging

2-headstock tube 611-fastener

3-upper tube 7-rotating shaft

5-bottom fork connector 91-side edge rotary folding head

51-recess 92-horizontal rotation folding head

52-U-shaped end 93-longitudinal rotary folding head

53-card slot

Detailed Description

With reference to fig. 1 to 10, the following is set forth in detail:

an improved folding bicycle frame (as shown in figures 1 and 2) comprises an upper tube 3 with two ends fixed between a middle tube 1 and a head tube 2, and a lower tube 6 having one end fixed to the middle of the upper tube 3 and the other end connected to the lower fork link 5, the lower tube 6 is fixed with the corresponding end of the lower fork connecting piece 5 through a rotating shaft 7, the bottom end of the middle tube 1 is movably supported on the lower fork connecting piece 5, so that the lower fork connecting piece 5 and the frame lower fork 10 can be conveniently folded along the longitudinal rotation, when the lower fork connecting piece 5 and the frame lower fork 10 are folded along the longitudinal rotation, the lower fork connecting piece 5 and the corresponding wheel of the head tube 2 can be aligned and overlapped, the upper tube 3 part between the middle tube 1 and the lower tube 6 is provided with an upper tube folding mechanism, which is convenient for the fixed part of the upper tube 3 and the middle tube 1 to rotate and fold, a locking mechanism which can prevent the frame from rotating when being opened is arranged between the lower fork connecting piece 5 and the lower pipe 6. Thus, the lower fork connecting piece 5 with the frame lower fork 10 (and the rear wheel) can rotate and fold along the longitudinal direction, namely rotate longitudinally around the middle pipe, the upper pipe, the lower pipe and the head pipe (and the front wheel), and the folding of the front wheel and the rear wheel is realized. In order to further reduce the folding space, the upper tube 3 part between the middle tube 1 and the lower tube 6 is provided with an upper tube folding mechanism, so that the upper tube 3 and the fixed part of the middle tube 1 can be conveniently rotated and folded, the space is further reduced, and the storage is convenient.

In order to realize that the locking mechanism can prevent the folding bicycle frame from rotating when the folding bicycle frame is unfolded and release the rotation when the folding bicycle frame is stored (as shown in figures 9 and 10), the locking mechanism is as follows: the lower fork connecting piece 5 forms a U-shaped end 52, the corresponding end of the lower tube 6 forms a lower tube forging 61 which can extend into the U-shaped end 52, the lower tube forging 61 and the lower fork connecting piece 5 are convenient to rotate and fix through the rotating shaft, and the bottom ends of the U-shaped end 52 and the lower tube forging 61 are respectively provided with a clamping groove 53 and a buckle 611 which are convenient to clamp and fix.

The lower end of the middle tube 1 is fixed with an elastic body 12 which is convenient to be movably supported on a corresponding concave part 51 on the lower fork connecting piece 5.

On the basis of the above, the upper tube folding mechanism has the following different folding modes:

the first embodiment is as follows: as shown in fig. 3 and 4, the upper tube folding mechanism is a side rotation folding head 91, which can be attached to the lower tube 6 when the upper tube connected to the middle tube 1 is folded along the side rotation.

Example two: as shown in fig. 5 and 6, the upper tube folding mechanism is a horizontal rotation folding head 92, and when the upper tube portion connected with the middle tube 1 is folded along horizontal rotation, the upper tube portion connected with the middle tube 1 can be attached to the upper tube portion connected with the head tube 2 along horizontal rotation.

Example three: as shown in fig. 7 and 8, the upper tube folding mechanism is a longitudinal rotation folding head 93, and when the upper tube portion connected with the middle tube 1 is folded in a longitudinal rotation manner, the upper tube portion connected with the middle tube 1 can be attached to the upper tube portion connected with the head tube 2 in a longitudinal rotation manner.

By applying the technology of the utility model, the folding bicycle realizes longitudinal folding through the locking mechanism, namely, the longitudinal rotation realizes the folding of the rear wheel of the front wheel, and then realizes three different folding modes (side edge rotation folding, longitudinal rotation folding and horizontal rotation folding) through the upper pipe folding mechanism, namely, the middle pipe and the connected cushion component are folded, thereby further reducing the space, being convenient for storage and having use value.

Claims

1. An improved folding bicycle frame comprises an upper tube (3) with two ends fixed between a middle tube (1) and a head tube (2), and a lower tube (6) with one end fixed in the middle of the upper tube (3) and the other end connected with a lower fork connecting piece (5), wherein the lower tube (6) is rotationally fixed with the corresponding end of the lower fork connecting piece (5) through a rotating shaft (7), the bottom end of the middle tube (1) is movably supported on the lower fork connecting piece (5), so that the lower fork connecting piece (5) is convenient to rotate and fold along the longitudinal direction with a bicycle frame lower fork (10), the lower fork connecting piece (5) and the corresponding wheel of the head tube (2) can be aligned and overlapped when the lower fork connecting piece (5) rotates and folds along the longitudinal direction with the bicycle frame lower fork (10), and is characterized in that the upper tube folding mechanism is arranged on the part of the upper tube (3) between the middle tube (1) and the lower tube (6), the fixed part of the upper tube (3) and the middle tube (1) can be conveniently rotated and folded, and a locking mechanism which can prevent the frame from rotating when being opened is arranged between the lower fork connecting piece (5) and the lower tube (6).

2. The improved foldable vehicle frame as claimed in claim 1, characterized in that the upper tube folding mechanism is a lateral rotation folding head (91) which can be applied against the lower tube (6) when the upper tube portion connected to the middle tube (1) is folded laterally in rotation.

3. The improved foldable vehicle frame as claimed in claim 1, characterized in that the upper tube folding mechanism is a horizontal rotary folding head (92), and when the upper tube portion connected with the middle tube (1) is folded along horizontal rotation, the upper tube portion connected with the middle tube (1) can be attached to the upper tube portion connected with the head tube (2) along horizontal rotation.

4. The improved foldable vehicle frame as claimed in claim 1, characterized in that the upper tube folding mechanism is a longitudinal rotary folding head (93), and when the upper tube portion connected with the middle tube (1) is folded in a longitudinal rotary manner, the upper tube portion connected with the middle tube (1) can be attached to the upper tube portion connected with the head tube (2) in a longitudinal rotary manner.

5. An improved foldable vehicle frame as claimed in claim 1, 2, 3 or 4, characterised in that the locking mechanism is: this lower fork connecting piece (5) form U type end (52) and this low tube (6) correspond the end and form lower pipe forging (61) that can stretch into this U type end (52), and this lower pipe forging (61) of being convenient for is connected (5) with this lower fork and is rotated fixedly through this pivot, and this U type end (52) and this lower pipe forging (61) bottom are equipped with respectively and are convenient for card income fixed draw-in groove (53) and buckle (611).

6. An improved foldable vehicle frame as claimed in claim 5, characterised in that the lower end of the middle tube (1) is fixed with an elastomer (12) for movable support in a corresponding recess (51) in the lower fork connection (5).