LT6601B - Portable folding backpack bicycle - Google Patents

Abstract

The invention relates to cycling technique and assigned to a portable folding bicycle, namely, which is convenient to carry, to pack into a portable backpack and which can ride not only the city but also the forest and field paths. Portable folding bicycle consisting of two folding junction A and B, and a connecting junction C, in which the locking bolt 1 is connecting the bicycle frame 4 with a detachable front part of the bicycle. The connecting junction C consists of a joint 16 with bearings 17, between which a metal rod is situated and fixed between the brackets 19. The joint 16 enables a handlebar to rotate sideways, thus to perform bicycle steering function. The detachable front part of the bicycle has a folding junction B, in which a double bending joint 20 is connecting the handlebar 3 with the front wheel fork 2. This joint allows to fold compactly the front part by bending the handlebar 3 towards the front wheel fork 2. The folding junction A of the rear part of the bicycle consist of a “T” shape connecting element 5 with the horizontal part 6 tightly fixed with the bicycle frame 4, and perpendicular part ends with joints 7 and 8, respectively connected to the fastening elements 9, 10 and 14. Fastening elements 9, 10, 14 are tightly fixed with each other with the locking bolt 14b. Unscrewing and removing the locking bolt 14b, the rare part of the bicycle can be compactly folded with the help of folding junction A by bending the seat tube 13 towards the frame 4, which in turn bending towards the frame part 11.

Description

BACKGROUND OF THE INVENTION The invention relates to bicycle technology and relates to folding bikes, namely compact folding bikes, which can be transported and carried in a portable backpack, not only for easy transport but also for carrying.

BACKGROUND OF THE INVENTION Various types of folding bikes are known in the art, such as city, mountain, children's bikes, which vary in wheel size, frame shape, and folding.

Known folding bicycle construction described in US201702I892 (A1), TPK B62kl5 / 00; B62K3 / 02, which incorporates a folding mechanism with a pivoting axle at the bottom of the bicycle frame to bend the bicycle so that the front forks of the bicycle are pressed against the rear wheel and the front wheel itself is removed and placed on the rear wheel. However, this bicycle design is not compact enough, more transportable, but not suitable for carrying because the wheels are two-pronged, high radius, and when the bicycle is folded, the structural parts of the frame protrude.

Known folding city bicycle, the construction of which is described in patent application WO 199904113 7 (A1), TPK B62K 15/00. The bicycle structure consists of a bicycle folding bicycle frame where one joint connects a perpendicular saddle tube to the diagonal part of the rear wheel frame and the other one to the front wheel frame part through a second joint. The axis of rotation of the joints is oriented perpendicular to the plane of the hinged body such that the saddle tube and the diagonal tube of the front wheel are folded parallel to one another and the front and rear wheels overlap partly inside these parallel tubes. The steering wheel of the bicycle is removed and placed inside the frame.

Although more compact and easy to fold compared to the first example, this bicycle is not compact enough to fit in a backpack when folded, since the wheels do not overlap when folded, and the folded frame is not comfortable to carry.

There are many types of folding bicycles available at https: //www.amazon.com using the search term folding bikes. The compactness of the folding is determined by the size of the bicycle wheels and the folding characteristics of the frame. Usually city bikes are compact because their wheels do not have a large radius, but such bikes are only suitable for high quality city streets.

Recently, bicycles have become particularly popular in hiking, where part of the chosen route is on foot, other part is cycling, so there is a need to design a bicycle that is not only foldable but light enough, compact and comfortable to carry. to get around and drive quickly, if necessary, not only on high-quality city streets, but also on lower quality roads, even forest tracks, find the optimum ratio between the compactness of a bicycle and its runnability.

It is an object of the present invention that a folding portable bicycle consisting of a frame, a seat tube and two bicycle frame folding units with hinges, and a removable steering wheel, has two folding units A and B and an additional connecting unit C which is connected by a locking bolt 1 to the bicycle frame. a part 4 with a removable front part of the bicycle consisting of a front wheel fork 2 which is connected to the steering wheel 3 via a double bend joint 20 and the folding unit A consists of a T-shaped coupling 5 whose horizontal part 6 is rigidly connected to the part 4 of the bicycle frame, and at the ends of the perpendicular portion of this element 5 are joints 7 and 8 having fasteners 9 and 10, wherein the element 9 is bolted to the bicycle frame part 11 and the seat tube 13 is rigidly connected to the connecting member 14 with its position oriented perpendicular to the fastener 10 and both of these elements 1 O and 14 are interconnected va by means of bolts 15 allowing the connecting member 14 to move horizontally and to change the horizontal locking position of the seat tube 13 attached thereto, and the axis of rotation of the joints 7 and 8 is oriented perpendicular to the plane of the bicycle frame.

The fasteners 9,10, 14 are angular in shape and are each rigidly secured to each other by a locking screw 14b.

The connecting member 14 has a cylindrical member 14a in the upper part with a nut in the upper part, on which the seat tube 13 is inserted and rigidly fixed.

The seat tube 13 is bolted to position 15 so that the vertical axis of the seat and the rear wheel overlap as much as possible.

The connecting unit C consists of a joint 16 in which a metal shaft is mounted between the bearings 17 and is rigidly fixed between the holders 19.

The front wheel has one outer wheel attachment fork 2 whose frame is curved so that the vertical axes of the wheel and the joystick overlap.

The invention is illustrated in IFIG, Figures 2, 3 and 4. 1. - shows a general diagram of the bicycle.

FIG. -Figure A of the folding unit A is shown.

Fig. - is a diagram of a folding unit B and a connecting unit C; 4. - shows the folding diagram of the bicycle.

Bicycle construction description.

FIG. depicts the overall construction of the bicycle. Folding bicycle consists of two folding A and B and connecting C units. A detachable front bicycle part consisting of a front wheel fork 2 connected to the steering wheel 3 via a double bend joint 20 is connected to the bicycle frame. The front part of the bicycle is secured by a locking bolt 1 to the bicycle frame part 4. The bicycle frame 11 has a folding unit A of the member 5, on which the bicycle frame part 4 is rigidly mounted on the horizontal part 6 and the ends of the perpendicular part through the joints 7 and 8 are connected to the fasteners 9 and 1 O. The fastening element 9 is bolted to the bicycle frame part 11. coupled to a connecting member 14 having a position perpendicular to the mounting member 10 and secured to each other by bolts 15 allowing the connecting member 14 to move horizontally and to change the horizontal locking position of the seat tube 13 attached, the upper member da The hinge assembly has a cylindrical member 14a with a nut on which the seat tube 13 is mounted and rigidly fixed. The folding unit B has a double-bend joint 20 which swivels the double-wishbone joystick 3 against the wheel fork 2. The front wheel has a vein outer fork 2, of which the shape is curved such that the vertical axes of the front wheel and the joystick overlap. This shape of the fork ensures a more compact folding of the bike,

FIG. a diagram of the folding unit A is shown. This folding unit has a T-shaped connecting member 5 through which the joint 7 and 8 fan-fold the bicycle frame parts 4 and 11 together with the seat tube 13. The horizontal connecting member 5 is fixed to the bicycle frame part 4 and has hinges mounted on it. 9 and 1 O are attached to the bicycle frame part 11.

FIG. depicts a diagram of bicycle Node C and B. The front of the bicycle consists of a front wheel fork 2 connected to the steering wheel 3 via a double bend assembly 20 by a locking bolt 1, the front of the bicycle (assembly B) connected to the bicycle frame part 4, a switch unit C consisting of a joint 16 the bearings 17 have a metal axis 18 mounted rigidly between the brackets 19. The moving axis 18 between the bearings allows the front wheel with the steering wheel to rotate horizontally.

FIG. shows the folding diagram of the bicycle in the sequence shown in positions A-E. A detailed explanation of each position is provided below, with reference to the designation of the elements in FIG.

Position A. The bicycle is in its initial assembled position for riding. To fold the bicycle, the standard clamps 21 on the seat-holding tube and the joystick tube are first released. When released, the seat and steering wheel are moved to their lowest positions.

Position B. A special key is used to unscrew and remove the locking bolts 1 and 14b. In this way, the folding assemblies (positions I and B in Fig. I) as well as the connecting assembly (position C in Fig. I) are released.

Position C. When the coupling is released (position I in Fig. I), it is possible to separate the front part of the bicycle with the steering wheel, the front wheel fork and the front wheel from the rear part of the bicycle with frame, rear wheel, pedals and seat mount. The rear part of the bicycle is folded through the folding unit A so that the seat tube 13 together with the connecting member 14 and the fastening member 10 are pivoted parallel to the bicycle plane and thereby folded to the frame part 4.

The front part of the bicycle is folded through folding unit B as follows: the tiller 3 attached to the double-bending joint 20 is tilted forward by 45 ° to release from the front wheel fork 2 and then the tiller 3 is rotated to the side of the fork 2.

Position D. The rear part of the bicycle is further bent through the folding unit A such that the seat tube 13 together with the frame part 4 and the T-shaped connecting member 5 is pivoted parallel to the bicycle plane through the joint 7, thereby fitting to the frame part 11. The seat saddle is pivoted 180 ° so that it sits compactly against the rear wheel.

The pedal legs are folded when their latches are released. The rear of the bicycle is fully folded.

The front part of the bicycle is then bent over the folding unit B so that the tiller rests fully against the front wheel. This requires the steering wheel to be turned 90 ° to remove one handle held by the latch. The front of the bike is folded.

Position E. The folded rear and front parts of the bicycle are stacked on each other so that the rear and front wheel axles bend slightly and form a compact module that can be placed in a backpack with the following dimensions: height <50cm, width <40cm, thickness <20 cm. The backpack can be versatile, carrying with a handle, and also fitted on the back with a brace, as well as pulling on wheels with a specially extendable handle.

The claimed folding bicycle is much more compact folding than the prototype, since when folded this way, both wheels overlap completely without protruding additional parts, making the folding bicycle fit in a standard 50x40x20 cm backpack, lightweight and stable and sturdy when assembled . Not only is it comfortable to ride on asphalt city trails, but also on poorer forest and outdoor tracks, as this bike design has found the optimum ratio of bike wheel diameter to runnability. The wheels have a diameter of 30 cm, which ensures good cycling.

In summary, compared to the prototype, the claimed new bicycle design makes it easy to fold the bike into a compact carry bag or backpack, quickly assemble it into a lightweight and at the same time stable bike suitable for urban and inferior forest and outdoor trails. Such a bike is not expensive and would be accessible to many people who like hiking, combining walking and cycling at the same time.

Claims (6)

DEFINITION OF INVENTION 1. Compact folding portable bicycle consisting of a frame, a seat tube and two bicycle frame folding units with hinges, and a removable steering wheel, characterized by having two folding units A and B and an additional connecting unit C, which connects the bicycle with the locking bolt 1 frame part 4 with a removable front bicycle part consisting of a front wheel fork 2 which is connected to the steering wheel 3 via a double bend joint 20, and the folding unit A consists of a T-shaped coupling 5 whose horizontal part 6 is rigidly connected to the bicycle frame part 4 and at the ends of the perpendicular part of this element 5 are provided joints 7 and 8 having fasteners 9 and 10, wherein the element 9 is fixed to the bicycle frame part 11 by screws 12 and the seat tube 13 rigidly connected to the connecting element 14 with respect to element 10, and both elements 10 and 14 intersect The hinges are connected by bolts 15 allowing the connecting member 14 to move horizontally and to change the horizontal locking position of the seat tube 13 attached thereto, and the axis of rotation of the joints 7 and 8 is oriented perpendicular to the plane of the bicycle frame. Compact folding portable bicycle according to claim 1, characterized in that the fasteners 9, 10, 14 are angular in shape and are all rigidly fixed to each other by a locking screw 14b. Compact folding portable bicycle according to claim 2, characterized in that the connecting element 14 has a cylindrical element 14a in the upper part with a nut in the upper part, on which the seat tube 13 is mounted and rigidly fixed. Compact folding portable bicycle according to claim 1, characterized in that the seat tube 13 is bolted 15 in such a position that the vertical axes of the seat and the rear wheel are as close as possible. Compact folding portable bicycle according to claim 1, characterized in that the connecting unit C consists of a joint 16 in which a metal shaft 18 is mounted between the bearings 17 and is rigidly fixed between the holders 19. Compact folding portable bicycle according to claim 1, characterized in that the front wheel has one outer wheel anchorage fork 2, the frame of which is bent so that the vertical axes of the wheel and the joystick 3 coincide.