WO2016019639A1

WO2016019639A1 - Longitudinal quick folding frame

Info

Publication number: WO2016019639A1
Application number: PCT/CN2014/089899
Authority: WO
Inventors: 黎龙飞
Original assignee: 黎龙飞
Priority date: 2014-08-05
Filing date: 2014-11-27
Publication date: 2016-02-11
Also published as: CN104149906A; CN104149906B

Abstract

Disclosed is a folding bicycle. A frame thereof can be divided into two parts, i.e. a front fork folding unit and a rear fork folding unit. The folding form is longitudinal folding, and the operation mode is to twist or plug together a head pipe (1) and a seat post (7). In this frame, a front fork (4) and the head pipe (1) are set as one piece after being folded, a rear fork (9) is housed as one piece with the seat post (7) after being folded, and using the two folding units enables the four positions of the frame to be folded. The invention can effectively solve the problem that existing folding bicycles have insufficient rigidity and durability, and has the characteristics of simplicity and reliability, smooth lines, easy and elegant operation, small volume after being folded, and high folding speed.

Description

Vertical quick folding frame

Technical field

The utility model relates to a bicycle, in particular to a bicycle which can be folded longitudinally and quickly.

Background technique

In recent years, bicycle sports have spread among the people who are paying more and more attention to the quality of life. This is accompanied by the popularization of automobiles and the wide spread of public transportation. Due to these two factors, portable folding bicycles have also been widely accepted. use. The folding method commonly used in the market for folding bicycles is generally horizontal folding, that is, the folding and unfolding of the frame is realized by using a box-shaped folding buckle on the girders and other parts by using a handle, which has the advantages of simple process and low cost. However, because of its folded position at the root of the girders and head tubes, its rigidity and durability are not ideal. In addition to ordinary horizontal folding bicycles, some of the higher-grade folding bicycles adopt a longitudinal folding design, and thus obtain better safety and durability, but these longitudinal folding frames still have complicated structure and complicated operation, and after folding Disadvantages such as large volume and chain drop.

technical problem

The traditional horizontal folding car is folded by the folding box. Generally, the middle section of the main beam of the frame is cut off to weld the folding box, and the folding box is arranged at the bottom end of the head tube, thereby causing poor rigidity of the frame, large safety hazard, and easy damage. The maintenance cost is high, and the folding mechanism is generally too complicated and complicated, and generally has more than three, so the steel is also poor.

Problem solution

Technical solution

The utility model aims to provide a longitudinal folding bicycle, which has the characteristics of quick folding, simple and reliable structure, beautiful appearance and free operation of the handle.

The present invention is achieved in the form of a longitudinal quick folding vehicle comprising a rear fork folding unit and a front fork folding unit.

The seat tube of the main beam of the frame is provided with a through hole, so that the rear fork hook member can be inserted.

The lower end of the seat rod is provided with a non-circular irregular opening, and the rear fork fixing member can be clamped.

The lower end of the head tube is different from the axis of the lower lower end tube, and the user inserts and inserts the front tube of the front fork and the head tube of the front fork to lock and fix the front fork.

The front fork is provided with a spring stop bolt, and the spring stop bolt includes a fixing screw, a spring piece and a bolt. The spring stop bolt is fixed to one end of the root of the front fork by a fixing screw, and the bolt is pressed into the end of the root of the front fork under the pressure of the spring piece. Inside the hole.

The plug of the spring stop can be in contact with the head tube after inserting the front fork, and the head tube is inserted into the front fork and then rotated to make the through hole coincide with the pin of the spring stop bolt, and is pressed into the head tube by the pressure of the spring. Through hole, and then fixed head tube and front fork.

Advantageous effects of the invention

Beneficial effect

The invention realizes the folding of the front fork and the rear fork by controlling the insertion and rotation of the head tube and the seat rod, and the user can separately control the head tube and the seat rod by both hands, and simultaneously fold and unfold, and has the advantages of simple and quick operation, simple and reliable structure. The shape is beautiful and smooth, which can effectively improve the rigidity of the frame, and eliminate the cumbersome operation of folding the buckle in multiple parts.

Brief description of the drawing

DRAWINGS

Figure 1 is a side view of the entire frame;

Figure 2 is a plan view and a side view of the frame in a folded state;

Figure 3 is an exploded view of the frame;

Figure 4 is a detailed view of the rear fork folding unit;

Figure 5 is a detail of the front fork folding unit Figure 1;

Figure 6 is a front fork folding unit detail view 2;

Invention embodiment

Embodiments of the invention

A longitudinal quick folding bicycle of the present invention will be further described in detail below with reference to the accompanying drawings.

In the drawings of the specification, the longitudinal quick-folding bicycle omits components such as a bowl, a handlebar, a crossbar, a wheelset, a seat bag, a brake system, and a drive system, and these components can be used in the prior art, and are not in the present invention. For the content category, those skilled in the art can use the existing components according to actual needs, and do not affect the technical effects of the present invention, and details are not described herein.

The longitudinal quick folding bicycle comprises a head tube 1, a bundle tube clamp 2, a front fork upper tube 3, a front fork 4, a spring stop bolt 5, a frame main beam 6, a seat rod 7, a seat rod clamp 8, a rear fork 9, and a front The fork hinge shaft 10, the rear fork hinge shaft 11, and the like.

The longitudinal quick folding bicycle can be roughly divided into a rear fork folding unit and a front fork folding unit, the control rod of the rear fork folding unit is a seat rod 7, and the control rod of the front fork folding unit is a head tube 1.

The rear fork folding unit comprises a main beam seat tube 15, a seat rod 7, a seat rod clamp 8, a rear fork 9, and a frame main beam 6 and a rear fork 9 connected by a hinge shaft 11.

Further, the main beam seat tube 15 and the seat rod 7 have through holes, and the seat rod opening 12 is non-circular irregular shape, and can be overlapped with the main beam seat tube through hole 13 under the control of the seat rod clamp 8.

Further, an adjustable screw 14 is disposed between the rear fork 9 and the main beam seat tube 15, and the umbrella head of the screw can extend into the main beam seat tube through hole 13 under the control of the hinge shaft 11.

Further, the adjustable screw 14 extends into the through hole 13 of the main beam seat tube, and sequentially extends into the seat opening 12, and the user then further presses the seat rod to fix the umbrella head of the adjustable screw 14 to the seat rod. In the inner wall, the operation link can make the seat rod, the main beam seat tube and the rear fork achieve fixation.

Further, when the user performs the loosening connection operation, only the seat rod 7 needs to be pulled, so that the adjustable screw 14 sequentially pulls out the seat rod opening 12 and the main beam seat tube through hole 13, and then the rear fork 9 can be folded and pulled out. Sitting on the pole 7.

Correspondingly, the front fork folding unit comprises a head tube 1, a pinch clamp 2, a front fork upper tube 3, a front fork 4, a spring stop bolt 5, and a front fork hinge shaft 10 and the like.

Further, the front fork 4 and the front fork upper tube 3 are connected and fixed by a hinge shaft 10, and then fixed to the main beam head tube 16 by a seat tube clamp 2.

Further, the head pipe 1 is composed of three or more round pipes, and the lowermost round pipe 22 and the lower lower end pipe 21 are inserted into the front fork root hole 26 and the front fork upper pipe 3, respectively.

Further, the outer diameter of the lowermost end pipe 22 in the head pipe 1 is slightly smaller than the lower end pipe 21, and the axial centers of the two pipes are not the same, and the outer diameters of the two pipes are tangent.

Further, the inner wall axis of the front fork upper tube 3 is parallel to the axis of the front fork root hole 26 but does not overlap, and the axis of the front fork root hole 26 is slightly offset from the inner wall axis of the front fork upper tube 3 toward the rear fork direction. .

Further, the lowermost end tube of the head pipe 1 can be inserted into the front fork root hole 26 through the inner wall of the front fork upper tube 3, and With its offset, the purpose of fixing the front fork upper tube 3, the front fork 4 and itself is achieved by rotation.

Further, the spring stopper 5 fixed to the front fork through the front fork screw hole 25 is composed of a fixing screw 19, a spring piece 27, and a plug 20.

Further, the latch 20 is inserted into the front fork through hole 24 at the pressure of the spring piece 27, and then is in contact with the head pipe 1, and a through hole 23 is provided at a proper position of the lowermost end pipe 23 of the head pipe, and is fixed at the rotary head pipe 1 In the front fork 4, the front fork upper tube 3 and its own operation, the head tube through hole 23 coincides with the bolt 20 of the spring stopper 5, and the bolt 20 is inserted into the head tube through hole 23 under the pressure of the spring piece 27 to prevent the head. Tube 1 continues to rotate and the purpose of abnormal extraction. Since the folding operation of the head tube folding unit is mainly performed by the rotation of the head tube, the hinge tube of the front fork upper tube 3 is provided with a stopping protrusion 18, and the main beam head tube of the frame main beam 6 corresponding thereto is provided. The lower end of the 16 is provided with two tenons 17.

Further, in the operation of fixing the front fork folding unit, the head pipe 1 is inserted into the front fork upper tube 3 and the front fork root hole 26, and the front fork upper tube 3 and the front fork 4 are driven to the main beam head tube 16 axis as an axis. Rotating, when rotated to a certain position, the retaining projection 18 of the front fork upper tube 3 is in contact with a tenon 17 on the main beam head tube 16, and the front fork upper tube 3 and the front fork 4 are thus fixed. The head tube is independently rotated to achieve the purpose of fixing the head pipe 1, the front fork pipe 3 and the front fork by rotation.

Further, when the user wants to perform the operation of folding the front fork, it is only necessary to rotate the head pipe 1 in the opposite direction, and the fixed head pipe 1 drives the front fork upper tube 3 and the front fork 4 to rotate to a certain position, the front fork The retaining projection 18 on the upper tube 3 is in contact with the other tenon, and the front fork upper tube 3 and the front fork 4 are rotated by the spring tab 27 of the spring stop bolt 5 which is fixed to the front fork 4. The upper end is in contact with the tenon 17 at the other end, and is bounced under the action of the tenon 17 to drive the bolt 20 away from the head tube through hole 23, whereby the head tube can continue under the action of two factors. The rotation, the loose head tube 1, the front fork upper tube 3, and the front fork 4 are fixed and pulled out, and the rear front fork 4 is folded by the front fork hinge shaft 10 for the shaft.

After the insertion and removal of the seat bar 7 and the rotation of the head pipe 1 are separately controlled by both hands, the rear fork 9 and the front fork 4 are longitudinally folded toward the main beam 6, and then the seat bar 7 and the head pipe 1 are completely pulled out and placed in a folded state. The folding action is completed in the gap between the rear fork 4 and the rear fork 9.

When the user wants to unfold the frame, only the upper ends of the head tube 1 and the seat rod 7 are separately required to be inserted into the front fork upper tube 3 and the main beam seat tube 15, respectively, and the fast fixed frame is realized by the above principle. action.

Claims

A folding frame is characterized in that it comprises a rear fork folding unit and a front fork folding unit, and the folding of the front fork and the rear fork folding unit is triggered by the head tube (1) and the seat rod (7).
A rear fork folding unit according to claim 1, comprising a main beam (6), a seat rod (7), a seat rod clamp (8), a rear fork (9), a rear fork hinge shaft (11), and the like. The seat rod (9) can be inserted into the main beam seat tube (15) to be fixed by the seat rod clamp (8), and the rear fork (9) is fixed to the main beam (6) through the rear fork hinge shaft (11), and the rear fork hinge shaft ( 11) The angle with the center line of the center axis is 5-10 degrees, and the rear fork (9) is fixed to the main beam (6) by the insertion of the seat rod (7).
A main beam (6) according to claim 2, characterized in that the main beam seat tube (15) is provided with a seat tube through hole (13).
A seat rod (7) according to claim 2, characterized in that the middle part has a seat rod clamp (8), the lower end has a seat rod opening (12), and the insertion main beam seat tube (15) is fixed to the seat rod clamp (8) ) Limited location.
A rear fork (9) according to claim 2, characterized in that the front end has a support rod (28), and the front end of the support rod (28) is provided with an umbrella-shaped adjustable hook member (14).
A front fork folding unit according to claim 1, comprising a head pipe (1), a bundle pipe clamp (2), a main beam head pipe (16), a front fork upper pipe (3), a front fork (4), Spring stop bolt (5), front fork hinge shaft (10) and other components, front fork upper tube (3) and front fork (4) are fixed by front fork hinge shaft (10), front fork upper tube (3) passes beam The pipe clamp (2) is fixed in the main beam head pipe (16), and the head pipe (1) extends into the inner wall of the upper fork upper pipe (3) and the front fork through hole (24), and is fixed by folding or loosening the front fork. unit.
The head pipe (1) according to claim 7, characterized in that it is composed of a plurality of round pipes having different outer diameters, and the outer diameter of the lower end pipe (22) of the head pipe (1) is slightly smaller than that of the lower lower end pipe (21). The outer diameter, the lower end tube (22) is parallel to the axis of the secondary small end tube (21) but not collinear. .
The spring stop bolt (5) according to claim 7, characterized in that it is composed of a fixing screw (19), a spring piece (27), a bolt (20) and the like. .
A front fork upper tube (3) according to claim 7, wherein the lower end is provided with a boss (18).
A main beam head pipe (16) according to claim 6 wherein the periphery is provided with two tenons (17). .