WO2000029277A1

WO2000029277A1 - Foldable bicycle

Info

Publication number: WO2000029277A1
Application number: PCT/CN1998/000271
Authority: WO
Inventors: Paul Hsin-Chieh Fang
Original assignee: Fang Paul Hsin Chieh
Priority date: 1998-11-13
Filing date: 1998-11-13
Publication date: 2000-05-25
Also published as: AU1140199A; JP2002529317A

Abstract

This invention relates to a foldable bicycle, including a front frame tube (1), a column tube (2) for receiving the steering handle, a main frame (3), a seat tube (4), a pair of cranks and pedals and some folding joints (5) arranged at the folding points of the frame. The main frame is cut off at the folding point, the two cut ends of the said frame are coupled with each other to form a convex seat at the other side. Both the front and rear forks are in the form of having only one fork blade and are at the same side. The front wheel and the rear wheel are conformable and convex toward the fork blades and the outer diameter of the former is corresponding to the inner diameter of the latter. Such crank is cut into two portions, the end portion, which is pivotally connected with the pedal, and the main portion which is pivotally connected with the said end portion through a bolt.

Description

Folding bike

Technical field

The invention relates to a foldable bicycle, in particular to a folding bicycle whose folding joints and pedals are locked and locked quickly and conveniently, and the front wheels are suitable for being stretched and stacked in the rear wheels, which can effectively reduce the folded volume. Background of the invention

In the early days, bicycles were mainly used as a means of travel. With the emergence of motor vehicles, bicycles that require human resources have gradually become a means of transportation for young people. Today, outdoor recreational sports are becoming more and more popular. Bicycles are also the best tool for outings in the countryside. Therefore, For the convenience of carrying, the folding design is the best choice. The current design of folding bicycles is nothing more than setting the handlebar and skeleton of the bicycle in a form that can be folded and retracted to reduce the size of the bicycle and facilitate the storage and carrying. Generally, the structure of a bending joint is a hinge structure that pivotally couples two objects that can be folded relatively, and cooperates with a locking structure to fix the expanded form. Among them, the common locking structure is a quick-release component that uses the eccentric principle to achieve an urgent effect, that is, it is a folding joint design using a quick-release component, and mainly uses a set of pivoted boxes and a lid to be fixedly connected to The two disconnected ends of the skeleton to be bent, and the other end of the box and the cover that are not pivoted are provided with a quick-release component for locking. The overall structural form is planned so that a set of boxes and the cover can be opposite to each other on the inner side to be able to be mutually connected. One of the latch assembly of the latch can be recessed with a recessed edge, and the other is fixed with a hollow latching tube with steel balls and springs corresponding to the recessed edge, so that the steel ball is pushed out of the latched tube by the spring pushing part, When the bicycle frame is unfolded and the box and cover are closed, the steel balls can be snapped against the concave edge, and the quick-release component is used to buckle the latching surface on the cover side of the cover. Have to lock the box and cover.

However, a careful study of this common folding positioning device has a large overall set of components, labor-intensive assembly time, high manufacturing cost, and the assembly of some components using welding methods, which increases the trouble of manufacturing, and the overall structure is large and large. It is prone to cause inconvenience to the rider, and also lacks beauty. In addition, the setting of the automatic latching structure of its box and cover is quite complicated, and it needs to cooperate with the quick release component to achieve the purpose of locking. The overall design is not excellent and needs to be improved.

In addition, in general folding bicycles, folding joints are usually provided only for large-volume skeletons, so that the volume can be greatly reduced after bending in one or two sections. Rarely, the cranks on both sides of the bicycle are structured as "cranks." And the "pedal" design collapses, so the folded bicycle generally still has a protruding pedal, which hinders the user from carrying and receiving. In addition, the folding structure of the above structure is mainly that the folding joint of the lower tube is a fulcrum so that the front and rear bodies overlap with each other. The vehicle body still has an angle space after being folded, and cannot be completely parallel. The collapsed volume (side width) is still very large, and the effect of reducing the volume is not very good. SUMMARY OF THE INVENTION The main object of the present invention is to provide a folding bicycle, which can simultaneously lock the bolts with the function of automatic latch positioning, so that the structure is convenient, easy to manufacture and easy to use. The folding bicycle includes components such as a front tube, a vertical rod, a skeleton, a seat tube, a folding joint and a pedal. The folding joint is provided at a bicycle pole frame to be folded, and the pole frame is set in a disconnected form. The abutting pivot ears on the side are pivotally connected, and the other side forms two mating half-bumped convex bodies, one of which passes through a movable bolt, and one end of the bolt forms a threaded body, and its end It has a circular arc surface, and a spring push-up bolt is set in the perforation of this base, so that the bolt has a force to move toward the other base, and the other base forms a near outer end with respect to the thread body of the bolt. A smooth hole surface and a positioning hole with a threaded section at the inner end, and a guide inclined surface is formed on the partial seat body at the front end of the outer edge of the positioning hole. When the rod frame is expanded so that the two seat bodies meet, the bolt is pushed by the spring. The arc-shaped circular surface slides along the guide slope to automatically snap into the smooth hole surface of the positioning hole, and the screwable bolt is screwed into the threaded section of the positioning hole to be locked. Conversely, when the bolt is unscrewed and pulled up, the bolt is released from the positioning hole, and the rod frame can be quickly folded. Wherein, the pole frame may be a skeleton or a vertical pole of a bicycle.

It is still another object of the present invention to provide a folding bicycle in which pedals protruding outward can be turned inwardly in order to eliminate the obstacle of protrusion on both sides. The folding bicycle includes components such as a front tube, a vertical rod, a skeleton, a seat tube, a folding joint and a pedal, wherein the bottom of the skeleton end is pivotally connected to the pedal by a crank, and the end of the crank is pivotally connected to the pedal. The cut-off and detachable form is pivotable, and the crank end of the pivotal pedal is fixedly connected with a shaft bolted through the pivot hole at the end of the main body of the pivot, and a card with a built-in spring ejector is provided on one side of the end of the crank body. The two ends of the end of the crank end corresponding to the latch to form two card holes, so that the end of the crank can be rotated 180 degrees relative to the crank body and positioned by the latch in the latch hole. Therefore, the pedal can be extended outward for stepping, and can also be folded inward, eliminating the obstacle of protruding on both sides.

Another object of the present invention is to provide a folding bicycle whose body can be folded and folded, so that the front wheel can be stretched and stacked inside the rear wheel to reduce the side width and the folded volume. The whole frame of the folding bicycle is connected with a bendable vertical rod and a handlebar on the front tube, and a front fork pivoting the front wheel is connected at the bottom end of the front tube, and a middle section is extended rearwardly. The skeleton of the joint is connected to a seat tube provided with a seat cushion, the skeleton end A pedal and a sprocket set are pivotally arranged on the bottom side, and a rear fork is extended to pivot the rear wheel of the seat tube. The front fork and the rear fork are arranged on the same side as a single side, and the ends of the two are pivoted respectively. The front and rear wheels maintain the same axis on the single-sided axles of the front and rear wheels, and the front and rear wheels are equally spaced in the rims of the front and rear forks to form cambered spokes, and make the front wheels ’ The outer wheel diameter corresponds to the inner diameter of the rim of the rear wheel. When the skeletal folding joint is disassembled and folded to fold the car body in half, the front wheel can be folded and accommodated in the rear wheel to reduce the side width and the collapsed volume. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram of an embodiment of the present invention.

Figure 2 is a side view of the present invention.

FIG. 3 is a schematic structural diagram of a folded joint of the present invention.

FIG. 4 is a schematic diagram of the locked state of the folded joint according to the present invention.

FIG. 5 is a schematic diagram of the locked state of the folded joint according to the present invention.

FIG. 6 is a schematic diagram of the unfolding state of the folded joint of the present invention.

FIG. 7 is a schematic structural diagram of another folding joint of the present invention.

FIG. 8 is a schematic structural diagram of a pedal and a crank of the present invention.

FIG. 9 is a schematic diagram of a combination of a pedal and a crank of the present invention.

FIG. 10 is a schematic diagram of the folded state of the present invention.

FIG. 11 is a sectional view of the folded state of the present invention. Mode of Carrying Out the Invention

The present invention is described in detail below with reference to the drawings.

First, please refer to FIG. 1 and FIG. 2. Application examples of the present invention include components such as a front tube 1, a vertical rod 2, a skeleton 3, a seat tube 4, a folding joint 5, and a stepping pole 6. The foldable structure with the pedal 6 and the front and rear wheels can be overlapped to save space. Among them, the design method of the folding joint 5 is to set a folding joint 5 at the near center of the body frame 3 and the vertical rod 2 near the front tube 1, so that the vehicle body can be folded in half, and the handlebar is extended vertically. 21 and the vertical rod 2 are inclined downward and lean against the vehicle side; among them, the folding joint 5 on the skeleton 3 mainly sets the bicycle skeleton 3 in a disconnected form, and the second disconnected end is pivoted on one side, and locking.

For the purpose of docking to form a complete skeleton 3 structure, an example design adopted is shown in FIG. 3. Skeleton 3 One side of the two breaks is formed with abutting pivot ears 51 and 52, two sets of pivot ears 51 and 52 are provided with holes to cooperate with the pivot shaft 53 to form a knot, and a lock seat 54 and a fixing seat 55 are formed on the other side. It is a butt-shaped half-bump convex body. Wherein, a lock hole 54 is formed in the lock base 54 to penetrate a movable bolt 56, and a spring 57 is set in the hole to set the bolt 56, and the force of the top bolt body to displace the fixture toward the fixed base 55 is The end of the bolt 56 forms a threaded body 561, and the end is provided with an arcuate surface 562. In addition, the fixing base 55 is formed with a positioning hole 551 with a threaded section on the inner end as a smooth hole surface near the bolt 56 and the threaded body 561 on the bolt 56. A guide slope 552 is formed.

When the folding joint 5 of the present invention is unfolded at the beginning of the vehicle body, the design of the present invention has a relatively convenient positioning effect, as shown in FIG. 4. When the skeleton 3 is unfolded so that the lock base 54 and the fixed base 55 are aligned, the bolts on the lock base 54 can be pushed up by the spring 57 and the arc surface 562 can be automatically retracted along the guide inclined surface 552 at the front end of the fixed base 55. When the smooth hole surface of the positioning hole 551 is engaged, at this time, the lock seat 54 is temporarily locked with respect to the fixed seat 55 to facilitate the vehicle body to be placed on the ground. Continue to refer to FIG. 5, the bolt 56 can be screwed into the threaded body 561 into the inner thread section of the positioning hole 551, and the locking seat 54 and the fixing seat 55 can be locked to match the other side. The construction of the pivot structure makes the folded joint of the skeleton 3 firmly connected, and has the strength of an integrated skeleton. In addition, if you want to unfold the folding frame 3, as shown in FIG. 6, you only need to unscrew the bolt 56 and pull it up to release the threaded body 561 from the positioning hole 551, which can be quickly folded. smoothly.

Also, as shown in FIG. 7, the design of the folding joint on the vertical rod 2 is similar to that of the folding joint on the skeleton 3. The only difference is that the direction of pivoting and locking is set obliquely. In addition, the shape of the molding may be slightly changed due to the round face of the vertical rod 2. Therefore, please do not commend the detailed component structure and operation form, but only use the diagram to illustrate it.

In addition, another important design of the present invention is directed to the improvement of the pedal structure, which mainly makes the end of the pivotal connection of the crank and the pedal to be cut off and pivoted. As shown in FIGS. 8 and 9, the end 611 of the crank end of the pivoting pedal 6 is penetrated by a pivot hole 614 at the end of the pivot body 61 with a shaft bolt 613, and a side of the end of the crank body 61 is provided with a An inner spring 615 pushes the latch 616, and the end surface of the crank end 611 is opposite to the latch 616, and a latch hole 612 is provided on each of the two sides, so that the crank end 611 can rotate one hundred relative to the crank body 61. At eighty degrees, the latch 616 is inserted into the latch hole 612 for positioning.

In addition, another important design of the present invention is that the front and rear two wheels can be overlapped to reduce the side width. Please refer to FIG. 1 again. The vehicle body of the present invention mainly includes a bendable vertical rod 2 connected to the front tube 1. And a handlebar 21, and the front end of the front tube 1 is provided with a single-sided front fork 11, which is pivotally connected to the axle of one side of the front wheel 12, and the front tube 1 is curved backward Extending a middle section is provided with a skeleton 3 with a folding joint 5 and connected to a seat tube 4, the seat tube 4 is connected to a seat post 41 on which a seat pad 41 1 is placed, and a single-sided rear fork 42 is extended backward, The end of the rear fork 42 is pivotally connected to the rear wheel 43 on one side, and maintains the same unilateral direction with the front fork 11 above, so that the front and rear wheels 12, 43 are adapted to form the same axis. In addition, the rims 121 and 431 of the front and rear wheels 12, 43 are equidistantly formed with one-side convex cambered spokes 122, 432, and the inner diameter of the rim 431 of the rear wheel 43 is the same as that of the outer wheel of the front wheel 12. corresponding. In addition, the bottom and bottom sides of the ends of the skeleton 3 are respectively pivoted with a pedal 6 and a sprocket set 7 for driving the rear wheels 43.

Therefore, when folding, as shown in FIG. 10, the folding joints on the skeleton 3 and the vertical rod 2 can be released, so that the front part of the skeleton 3 includes the front wheels 12, the handlebars 21, and the like, and leans back. Fold in half to reduce most of the volume, and the handlebar 21 on the upper section of the vertical rod 2 can be slanted downward and close to the side of the car body, and the latch 616 on the crank body 61 is retracted from the end of the crank end 61 1 The hole 612 enables the crank end 61 1 and the pedal 6 to be turned inward, so that the income pedal 6 is hidden in the space of the width of the vehicle body, and the protruding volume on both sides is reduced. As shown in FIG. 11 again, the wheel body of the front wheel 12 can be overlapped and accommodated in the rim 431 of the rear wheel 43 to reduce the side width and reduce the collapsed volume. In addition, the bendable form of the vertical rod 2, that is, the upper pivot joint thereof, can be used to bend the vertical rod 2 and the handlebar 21 obliquely to collect it at the side of the vehicle body, and also effectively reduce the collapsed volume.

With the above design, when the folding bicycle of the present invention is used for folding operation, the folding joint 5 and the pedal 6 folding structure, the unilateral front fork 1 1 and the rear fork 42 cooperate with the unilaterally curved front wheel body 12 The rear wheel body 43 is not only novel and ingenious in design, but also smooth and smooth in the form of retracting. Compared with the prior art, it also achieves the effect of significantly reducing the volume of retracting.

Claims

Claim

1. A folding bicycle, including a front tube, a vertical rod, a skeleton, a seat tube, a folding joint and a pedal, and the like, wherein the front tube is connected with a bendable vertical rod and a handlebar, and is connected at the bottom of the front tube. A front fork pivotally connected to the front wheels is provided, and a mid-section skeleton with a folding joint is extended rearwardly to be connected with a seat tube with a seat cushion. A pedal and a sprocket set are pivotally arranged on the bottom side of the skeleton end, and The rear end of the seat tube extends a rear fork pivotally connected to the rear wheel, which is characterized in that: the front fork and the rear fork are provided in the form of a single side on the same side, and the ends of the two are pivotally connected to the unilateral axles of the front and rear wheels respectively, so that The front and rear wheels maintain the same axis, and the rims of the front and rear wheels are equidistantly formed into curved spokes that are convex toward the front and rear forks, and the outer wheel diameter of the front wheel corresponds to the inner diameter of the rear wheel. When the skeleton folding joint is disassembled and folded to fold the car body in half, the front wheel can be folded and accommodated in the rear wheel to reduce the side width and the folded volume.

2. A folding bicycle, including a front tube, a vertical rod, a skeleton, a seat tube, a folding joint and a pedal, and the folding joint is provided at a bicycle pole frame to be folded, which is characterized in that the pole frame is set to be broken In the form of separation, two side ends of the two disconnected ends are pivotally connected to each other, and the other side forms two butt-shaped half-bump convex socket bodies, one of which is connected with a movable bolt, and one end of the bolt is formed. A threaded body with an arc-round surface at its end, and a spring push-up bolt is set in the perforation of this base, so that the bolt has a constant displacement force toward the other base, and the other base is opposite to the base of the bolt. The threaded body forms a positioning hole with a smooth hole surface near the outer end and a threaded section at the inner end, and a guide inclined surface is formed on the local seat at the front end of the outer edge of the positioning hole. The bolt is automatically pushed into the smooth hole surface of the positioning hole by being pushed by the spring and sliding along the arc surface along the guide slope surface. The bolt can be screwed into the screw hole of the positioning hole to be locked.

3. The folding bicycle according to claim 2, wherein: the pole frame is a skeleton or a vertical pole of a bicycle.

4. A folding bicycle, including a front tube, a vertical rod, a skeleton, a seat tube, a folding joint and a pedal, and the like, wherein the bottom of the skeleton end is pivotally connected to the pedal by a crank, which is characterized by: the crank and the pedal The end of the pivotal link is provided in a truncated and detachable form, and the crank end of the pivotal pedal is fixedly connected to a pivot hole that pivots through the end of the main body of the pivot, and is provided on one side of the end of the crank body A latch with a built-in spring ejection is formed, and two sides of the end of the crank end corresponding to the latch are formed into two latch holes, so that the crank end can be rotated by 180 degrees relative to the crank body and the latch is inserted into the latch. Card hole positioning.