WO2014056288A1

WO2014056288A1 - Folding luggage cart unfolding to form bicycle

Info

Publication number: WO2014056288A1
Application number: PCT/CN2013/000034
Authority: WO
Inventors: 吴宁
Original assignee: Wu Ning
Priority date: 2012-10-08
Filing date: 2013-01-16
Publication date: 2014-04-17

Abstract

A folding luggage cart unfolding to form a bicycle and composed of a front wheel, an extending and folding stem and steering assembly (1), a rear wheel, an extending and folding seat, a driving assembly (2) and an intermediate four connecting rod folding frame assembly (3). An extendable and folding stem (7) and a seat rod can be pulled out from the lower part and be locked. When the four connecting rod folding frame assembly (3) is folded and retracted to the width of the luggage cart, the front and rear assemblies (1, 2) connected thereto are parallel, and when same is unfolded into a bicycle frame, the front and rear assemblies (1, 2) respectively form a required angle of inclination with the ground, a form of stable trapezoid shape. The cart can be conveniently carried with a traveller and carry relatively heavy luggage on a journey, and can further be unfolded to form a portable travelling bicycle when necessary. In addition, the position of the frame is relatively low, facilitating riding and use by women, and while ensuring the aforementioned requirements, achieves the effects and aims of a compact and portable bulk after folding, and convenient storage.

Description

Folding luggage cart capable of forming bicycles

The invention relates to a multi-purpose bicycle, in particular to a foldable bicycle which is convenient to carry and has a multi-purpose vehicle. Background technique

We usually need a baggage car to carry luggage when traveling long distances. Generally, the baggage car can be folded, but few people use it for other purposes. In fact, we may need a bicycle more during the trip, so we can get off the plane and train, and leave the private car for short trips in downtown and scenic areas. However, due to the weight and size of the bicycle, in addition to the special bicycle hike, almost no one can carry a heavy bicycle with you on long-distance travel. Some bicycles can also be folded and lighter, but still greatly Beyond the possibility that travelers can easily carry around. Despite attempts to design bicycles that can be converted into luggage carts, there are many serious flaws that lack practical value.

In the newer background technology, there is a small-wheel folding bicycle A- bike that is closest to the case, also productized, and produced by many manufacturers. It is derived from the relatively new patented technology abroad. Known as the world's lightest and smallest folding bike. Because the car adopts the integrated transmission shifting mechanism and the telescopic frame technology, it folds and shrinks relatively compactly, and it is lighter in weight due to the large amount of aluminum alloy material. There is also a domestically licensed invention patent that is similar. The application number and authorization number are 200910103736. 0 and CN 101544259 B, respectively, but the corresponding products are not seen in the market. The following are mainly about these two newer technologies to illustrate the shortcomings and shortcomings of traditional technologies.

In order to simplify the structure and reduce the weight as much as possible, the frame of both cars adopts a simple and stable triangular structure or A-shaped structure, so that the rear frame can be realized while maintaining such small size and lightness. The sturdy requirements of manned riding.

However, because the upper end of the A-shaped structure is too small to pull the required distance between the handlebar and the seat, it uses three methods to expand: 1 is to add a small beam at the top of the A, so that A The upper end is a little wider, and it does not affect the stability of the structure. 2 is to add a small beam between the handlebar and the handlebar pole, so that the handlebars will be forwarded forward, which is equivalent to moving the handlebar forward a distance. 3 is the rear of the small beam added at the top of the A-shaped and the lower side of the telescopic frame. Two telescopic rods are added by the telescopic frame. When the frame is unfolded, another triangle is formed with the frame, and the seat is specially installed. This is equivalent to adding a small beam between the frame and the seat to move the seat backwards. Despite this, the handlebars are moved forward, the seat is moved backwards, and the middle is widened. The three extension distances are still small, and there is still a feeling that the thighs will touch the handlebars when riding the car. And the design of the frame in this way creates new safety issues. First of all, the handlebars that are forwarded forward, especially the new straight handles, do not coincide with the center of the front wheel and move backwards, causing a turn, not a hand held forward, the other hand You can turn backwards, but both hands draw an arc at the same time somewhere in front of the front wheel. This method is not suitable for everyone to adapt in a short time. It is easy to sway when riding this kind of car, so that it can be used with traditional bicycles, handlebars, and the handlebars of the handlebars. The operating technique is just the opposite. It is dangerous for people who are riding a traditional bicycle and suddenly change to ride it. Secondly, the shortcoming of the middle height of the A-shaped retractable frame can not be solved. It can only telescopic the main frame. The main telescopic and locking function of the handlebar and the seat is the overall expansion and locking function of the main frame. Designed to be inseparable, not the flexible mode of the telescopic handlebars, the seat or even the frame, so some people ride on the telescopic expansion, and the car with the high-high protruding frame in the middle of the car looks strange on the street. Strange, riding is also very uncomfortable. In particular, most women do not like to get on the back of the car. When they get off the bus, they need a quick front kick. That is, women get on and off the car in front of the car. This phenomenon is especially reflected in the summer when women wear skirts because At this time, it is impossible to get on the train from the rear, which makes this model have obvious gender preference. In addition, women, including many are not flexible enough, short and age-biased When a big male rides a bicycle, the person is squatting forward after the sudden braking. If this is a traditional curved car with a large curved beam, you can fork your legs and land on the curved beam. Keep yourself from falling, but if it’s past high straight beams

The 28-inch male car is hard to come down. Especially for this new A-shaped frame, the front frame may be taller than the seat. She or he can't get off the car and can only fall heavily on the ground. And it may also hurt the ankle, posing a greater risk to the rider, especially the female rider.

In addition, the aforementioned A-shaped telescopic folding wheelbarrow, which has been commercialized, is not capable or inconvenient to pull, although it is small in folding, whether it is squatting, moving, carrying, or carrying a bicycle. Long-distance fulfillment, it is still a bit of a fantasy, after all, there is no light load. The latter type A telescopic folding BMX is only slightly improved on the original basis. It does not solve the main problems such as difficulty in riding and impracticality of this type of vehicle, and it is a bit cumbersome when the design is changed into a luggage cart. The two ready-made wheels are used at different times, and a wheel is designed to be carried behind the car. Not only is it ugly, but it also adds weight, and it is difficult to be tempted by others. Summary of the invention

In view of the above-mentioned deficiencies of the prior art, the problem to be solved by the present invention is to provide a folding luggage cart that can form a bicycle, which can be conveniently carried by a traveler, dragging a heavier baggage, and can also be used when needed. Expanded to form a lightweight travel bike, and the frame of the car is low in position for women to ride and use. At the same time, the use of a separate foldable frame, a separate retractable handlebar, and a separate retractable seat design can make the height of the handlebar and the seat, the distance between them more reasonable, and solve the riding comfort and practicality. The problem is that there is no danger of the knee touching the handlebar when turning, and under these premise, the same effect and purpose of compacting and compacting after the folding is achieved.

In order to achieve the above object, the present invention adopts the following technical solution - a folding luggage cart capable of forming a bicycle, which is composed of a front wheel, a telescopic folding handle assembly 1, a rear wheel, a telescopic folding seat, a drive assembly 2, and an intermediate portion. The front and rear components are respectively constructed by a four-link folding frame assembly 3 hinged on the upper and lower sides. The front wheel and the directional assembly are composed of a front wheel 4, a front fork 5, a front frame hinge rod 6 fixed to the upper end of the front fork, and a retractable and folding handlebar 7 with a lever. The lever of the retractable, folding handlebar 7 can be pulled out from the lower front frame hinge lever 6 and locked by the positioning lock. The middle portion of the left and right handlebars of the retractable and folding handlebar 7 are hinged and are in a relatively locked state by the positioning locking device, wherein only the half side is fixed to the lever, the other half can be folded from the upper side to the required side when needed. On the opposite side, it can be folded into a state in which the left and right sides are placed on the same side when the baggage car is formed. The rear wheel, the telescopic folding seat, the driving assembly 2 is composed of a rear wheel 8, an integrated transmission shifting mechanism 9, a pedal mechanism 10, a rear frame hinge rod 11 fixed to the upper end of the integrated transmission shifting mechanism 9, and a seat rod The telescopic folding seat 12 is composed of a seat bar which can be pulled out from the rear frame hinge lever 11 and locked by a positioning locking device. The four-link folding frame assembly 3 includes an intermediate foldable four-bar linkage mechanism 13, a front hinge sleeve 14 which is respectively hingedly connected to the upper and lower sides of the four-bar linkage mechanism and forms a rotatably sleeve with the front frame hinge rod 6. And a hinged sleeve 15 which is rotatably sleeved with the upper and lower hinges of the four-bar linkage mechanism and the rear frame hinge rod 11 respectively, when the above-mentioned four-link folding frame assembly 3 is laterally opened to become a bicycle frame At the time, the four sides of the front and rear two quadrilaterals formed by the upper and lower hinged sleeves 14 and the rear hinged sleeve 15 and the intermediate foldable four-bar linkage 13 are unequal non-parallelograms, if Appropriate selection of the position of all the movable connecting shafts between the four links hinged to each other allows the four-link folding frame assembly 3 to be skillfully formed with the front wheel and the telescopic folding direction component of the rotatably sleeved It is parallel with the rear wheel, the telescopic folding seat and the driving assembly folded and compressed to the width of the luggage cart. When it is unfolded into a bicycle frame, it can form the front wheel of the bicycle, the telescopic folding direction component, the rear wheel and the telescopic folding seat. The drive assembly are each formed with an inclined surface angle desired, a stable state of a trapezoid. The front wheel, the telescopic folding handle direction assembly 1 and the rear wheel, the telescopic folding seat, and the drive assembly 2 can all be steered, and they can be locked when rotated 90 degrees in the same direction, and the middle four-link folding bicycle at this time When the frame assembly 3 is in the compressed baggage width and the two ends are parallel, the two luggage compartments of the folded luggage car and the front hinge sleeve 14 and the rear hinge sleeve 15 are formed in parallel. In the state, the entire vehicle can be pulled by a telescopic folding handlebar 7 that can be pulled out and folded to a single side. The above-mentioned foldable four-bar linkage mechanism 13 and the front hinge sleeve 14 and the rear hinge sleeve 15 are respectively hinged on the side of the two sides of the link is a single tube, and the other side is a double tube arrangement, the single tube is in the middle, the double tube It is placed on the outside to clamp a single tube connected to it through the connecting rod shaft, thus forming a more stable, symmetrical, uniform force four-bar linkage mechanism composed of six metal tubes. The above-mentioned four-link folding frame assembly 3 and the rear wheel, the telescopic folding seat, and the driving assembly 2, when they are unfolded to form a bicycle frame, can pass through the foldable four-bar linkage 13 and the rear wheel, the telescopic folding seat, The frame assembly mechanism is provided on the drive unit 2, and the frame that is pressed downward is locked when it is opened to a predetermined position and the steerable rear wheel, the telescopic folding seat, and the drive assembly are rotated to a predetermined position.

The frame locking mechanism described above may be provided with a four-bar linkage locking top block 16 hinged to the lower end end of the double-tube side under the foldable four-bar linkage mechanism 13 on the plane of the box above the integrated transmission shifting mechanism 9. The rear wheel direction locking protrusion 20 and the rear wheel direction limiting protrusion 21 are provided. When the folding four-bar linkage 13 is unfolded to form the bicycle frame, the lower surface of the connecting rod hinged below the rear hinge sleeve 15 should be integrated with The transmission shifting mechanism 9 is large and parallel on the large side of the box body, but we must first make the folding four-bar linkage 13 unfolded and higher, so that we can lock the four-bar linkage to the opposite side of the top block 16 Rotating and attempting to lie on the notch of the opposite end of the single-link extension end, and rotating the integrated transmission shifting mechanism including the rear wheel direction locking projection 20 thereon to the lower side link of the folded four-bar linkage mechanism, Since the rear wheel direction limiting protrusion 21 is higher than the rear wheel direction locking protrusion 20 and closer to the lower hinge point of the connecting rod and the rear hinge sleeve 15, the rotation process is limited by the rear wheel direction limiting protrusion 21, The rear wheel should be in line with the frame formed by the four-bar linkage mechanism, so that when the slightly extended folding four-bar linkage is deployed, it falls back down to the large surface of the integrated transmission shifting mechanism 9 In the position, one of the double links hinged to the lower side of the rear hinge sleeve 15 is just lying in the gap between the rear wheel direction locking projection 20 and the rear wheel direction limiting projection 21, and the rear wheel direction locking projection 20 also fits into the gap of the double rod and is clamped, so that the direction of the entire steerable rear wheel, the telescopic folding seat and the driving assembly 2 is locked at the position of the bicycle, and at this time, the four-bar linkage locks the top. The block 16 is also just tightened against the notch of the opposite end of the single-link extension, so that the downwardly-pressed folded four-bar linkage 13 is restrained and locked when deployed to a prescribed position.

The pedal mechanism 10 described above can be equipped with an easy-to-remove pedal crank attachment on its pedal crank; the easy-to-remove pedal crank attachment includes a pedal crank locking bolt 17 with a knob, a special fixing cover 18 for the locking bolt and The bolt pin 19 is composed of a special fixing cover 18 for the locking bolt, which is screwed on the outer thread of the decorative cover which is originally installed on the outside of the square hole of the pedal crank, and the pedal crank locking bolt with the knob is fixed by the locking bolt. On the other side of the cover, the pedal crank lock bolt 17 with the knob is locked by the pin 19 or the split pin on the other side of the cover, so that the pedal crank lock bolt 17 with the knob can be locked The bolt fixing special cover 18 is rotated on the upper side to form a dynamic fit, so that the pedal crank locking bolt 17 with the knob can rotate or rotate the pedal crank together with the foldable pedal mounted thereon, The two mounting holes 34 are also provided at the same position of the knob end face of the pedal crank lock bolt with the knob and the special fixing cover of the lock bolt.

The front wheel, the telescopic folding handle direction assembly 1, the rear wheel, the telescopic folding seat and the drive assembly 2 are respectively provided with a folding luggage rack fixing bolt right angle 22 on the outer side of the outer side thereof for mounting the folding luggage rack 23 and its accessories 24 The folding luggage rack 23 is hinged by three hollow rectangular movable metal rods, and the two luggage rack longitudinal rods 25 are hinged at the ends of the roof rack rail 26, and the other perpendicular surface of the rail should be There are also holes at both ends that are hinged to the fixing bolts on the right angle 22 of the folding luggage rack fixing bolts, but only one side is actually provided, and the other end is only provided with a groove matching the fixing bolt at the corresponding position. When the whole vehicle is unfolded to form a bicycle, the luggage rack is folded, and the luggage rack rail 26 is vertically hinged on the fixing bolt on the right angle 22 of the folding luggage rack fixing bolt of the front wheel, and the two luggage rack vertical rods 25 are folded opposite each other. Slightly inclined and closely attached to the roof rail 26, when the luggage cart is formed in the present invention, the front and rear wheels are arranged in parallel, and at this time we let the roof rail 26 rotate 90 degrees to level, backwards The folding luggage rack is fixed on the fixing bolt of the right angle 22 and fastened with the groove on it, so that the parallel state of the two wheels is further locked; this is actually a state of not carrying heavy luggage, if we want to further enable this To fold the luggage rack, we must move the two luggage racks before the rack rail 26 is rotated 90 degrees. 25 unfolded into a state perpendicular to the roof rail 26, and then rotated 90 degrees to flatten and lock the fixing bolts on the right angle 22 of the folding luggage rack fixing bolts on the opposite side, and finally the two on the luggage rack attachment 24 A metal button 27 with a spring button is tightly inserted into the two hollow roof racks 25 that cooperate with it and is locked by a positioning locking device formed by the opening of the roof rail 25 corresponding to the spring button. Then a complete luggage rack was formed.

The front wheel, the telescopic folding handle direction assembly 1, the rear wheel, the telescopic folding seat, the drive assembly 2 and the four-link folding frame assembly 3, when folded into a luggage cart, on the rear side of the entire center of gravity of the frame, That is, the side of the integrated transmission shifting mechanism 9 is biased, and a special backpack assembly with lighter luggage can be provided, and a special single-locked buckle 33 for supporting them and the whole vehicle at this time; the special backpack assembly includes, a special backpack 28, which is respectively attached to the front wheel, the steering assembly, the rear wheel, the seat, the shoulder bag hook 29 on the driving assembly and the two backpack lanyards 30 matched on the upper part of the special backpack; The special backpack 28 described above is provided with a length-matched vertical zipper 31 which can be pulled to the bottom of the special backpack at the place where the integrated transmission shifting mechanism 9 collides. After the zipper 31 is pulled apart, the inside is provided with one body. The transmission gear shifting mechanism 9 has a bag with a close volume on the rear side of the casing, and it is possible to fit the protruding portion of the integrated transmission shifting mechanism 9 as a whole; The single kick with lock 33 is a single kick with an increased folding angle, which ensures that the single kick can be closely attached to the rear side of the box of the integrated transmission shifting mechanism 9 in case it is deformed into a bicycle and operated. The pedal mechanism 10 conflicts.

The above-mentioned various components of the present invention, the retractable portion, the folding handlebar and the steerable rear wheel, the telescopic folding seat, and the steering portion of the driving assembly are all sleeve-layered designs, and an elastic positioning button for locking is disposed on the inner layer. The positioning holes are matched on the outer layer, so that the inner layer can be positioned and locked by the cooperation between the elastic button and the different position positioning holes after extending, retracting or rotating 90 degrees to form a positioning locking device. In fact, the telescopic folding handle assembly of the present invention, the rear wheel, the telescopic folding seat, and the telescopic portion of the drive assembly are the same as the telescopic handle of the folding scooter, not only the sleeve design, but also the handlebar and the seatpost and their The corresponding jacket layer also has matching positioning slots to prevent the handlebar from rotating relative to the front fork, the seat and the frame, and also has a safety lock collar 32 with a trigger for further locking to be raised. Position the handlebars and the seat to maximize safety.

Compared with the prior art, the present invention has the outstanding advantages that it can be conveniently carried by the traveler, dragging and heavier baggage travel, and can also form a light travel bicycle when needed, carrying the traveler on a long distance. During the trip or at the destination, you can take a short-distance action of freedom, environmental protection, and good health. When you are not using it, you can drag and drop it in the mall, the scenic area or even play like a normal baggage car. And the frame of the car is low in position, making it easy for women to ride and use. At the same time, the use of a separate foldable frame, a separate retractable handlebar, and a separate retractable seat design can make the height of the handlebar and the seat, the distance between them more reasonable, and solve the riding comfort and practicality. The problem, and under these premise, also achieves the effect and purpose of compact and lightweight after folding. In high-rise offices, residences, and any places where parking is inconvenient, it can be folded into small, lightweight luggage carts that are pulled into the elevator, pulled into the office, or carried on the floor, conveniently placed in the office or at home. Under the table, behind the door, in the kitchen, even under the train seat, in the trunk of the car, in any corner of the collection. DRAWINGS

The drawings are schematic structural views of embodiments of the present invention.

1 is a perspective structural view of a folding luggage cart capable of forming a bicycle according to the present invention; FIG. 2 is a perspective structural view of the present invention when folded into a luggage cart and a folding luggage rack and a luggage rack attachment; 3 is a schematic perspective view showing the structure of the present invention when folded into a luggage cart and attached to a special shoulder bag;

Figure 4 is a perspective view of the present invention folded into a minimum structure and stood with a dedicated single-kick support; Figure 5 is a foldable four-bar linkage mechanism slightly extended, the integrated transmission shifting mechanism together with the rear wheel direction locking projection thereon a view to the underside of the raised foldable four-bar linkage that is ready to be turned directly underneath it, etc., when it is re-dropped; Fig. 6 is a schematic view showing the locking of the top block when the folding four-bar linkage is deployed, and the four-bar linkage is used to lock the top block; Fig. 7 is a view of attaching the pedal handle to the pedal handle and the single kicking and kicking in FIG. Figure 2 is a schematic view showing the structure of the assembly of the attachment of the pedal handle;

Figure 9 is a schematic view showing the three-dimensional structure of the luggage rack attachment;

Figure 10 is a perspective view of a dedicated backpack;

Figure 11 is a perspective view of the user carrying a special backpack while riding into a bicycle; Figure 12 is a perspective view of the user walking with a special backpack hanging on the luggage cart when the user folds into the luggage cart;

1 to 12: 1 front wheel, telescopic folding handle assembly; 2 rear wheel, telescopic folding seat, drive assembly; 3 four-link folding frame assembly; 4 front wheel; 5 front fork; 6 front frame articulated rod; 7 retractable, folding handlebar; 8 rear wheel; 9 integrated transmission shifting mechanism; 10 pedaling mechanism; 11 rear frame articulated lever; 12 retractable folding seat with seatpost; Foldable four-bar linkage; 14 front articulated bushing; 15 rear articulated bushing; 16 four-bar linkage locking top block; 17 pedal crank locking bolt with knob; 18 locking bolt special fixing cover; Axis; 20 rear wheel direction locking projection; 21 rear wheel direction limiting protrusion; 22 folding luggage rack fixing bolt right angle; 23 folding luggage rack; 24 luggage rack attachment; 25 luggage rack longitudinal bar; 26 luggage rack rail; Metal tongue; 28 special backpack; 29 shoulder bag hook; 30 shoulder bag lanyard; 31 zipper; 32 safety lock hoop; 33 special lock single kick; 34 mounting holes. detailed description

The invention will now be further described with reference to the drawings and specific embodiments.

As shown in FIG. 1 to FIG. 12, a folding luggage cart capable of forming a bicycle includes:

The front wheel, the telescopic folding direction component 1, the rear wheel, the telescopic folding seat, the driving assembly 2 and the four-link folding frame assembly 3 which are respectively hinged up and down in the middle and the front and rear components respectively; wherein the front wheel and the direction component are from the front The wheel 4, the front fork 5, the front frame hinge rod 6 fixed to the upper end of the front fork and the retractable and folding handlebar 7 with the lever; the telescopic and folding handlebar 7 of the handlebar can be removed from the lower half The front frame hinged rod 6 fixed to the upper end of the front fork is pulled out and locked by a positioning locking device. The middle portion of the left and right handlebars of the retractable and folding handlebar 7 is hinged and locked in a relatively locked state by the positioning locking device, wherein only the half of the handlebar is fixed to the lever, the other half can be The upper side is folded to the opposite side so that it can be folded into a state of being on the same side when the luggage cart is formed; the rear wheel, the telescopic folding seat, the drive assembly 2 are provided by the rear wheel 8, the integrated transmission shifting mechanism 9, and the foot The stepping mechanism 10 is composed of a rear frame hinge rod 11 fixed to the upper end of the integrated transmission shifting mechanism 9, and a retractable folding seat 12 with a seat rod, wherein the seat post can be fixed from the integrated transmission shifting mechanism 9 and the upper end thereof. The rear frame hinge rod 11 is pulled out and locked by the positioning locking device; the above-mentioned four-link folding frame assembly 3 includes an intermediate foldable four-bar linkage mechanism 13 and hinged to the upper and lower sides of the four-bar linkage mechanism respectively. Further, the front frame hinge rod 6 in the middle of the front wheel and the telescopic folding handle assembly 1 forms a rotatably sleeved front hinge sleeve 14 and two upper and lower hinges and a rear wheel and a telescopic folding seat respectively. , The rear frame hinge rod 11 in the middle of the movable assembly 2 forms a rotatably sleeved rear hinge sleeve 15 which is actually in front of the bicycle frame when the four-link folding frame assembly 3 is laterally pulled apart The four sides of the front and rear two quadrilaterals formed by the hinged sleeve 14 and the rear hinge sleeve 15 and the intermediate foldable four-bar linkage 13 are unequal, that is, not parallelograms; if the appropriate selection is hinged to each other The position of all the movable connecting shafts between the four links allows the four-link folding frame assembly 3 to subtly form the front wheel, the telescopic folding handle direction assembly and the rear wheel, and the telescopically folded sleeve The folding seat and the driving assembly are compressed in parallel to the width of the luggage cart, and when the bicycle frame is unfolded into a bicycle frame, the front wheel of the bicycle, the telescopic folding direction component, the rear wheel, the telescopic folding seat and the driving component are respectively grounded. Forming the required tilt angle, a stable trapezoidal state; the front wheel, the telescopic folding direction assembly 1 and the rear wheel, the telescopic folding seat, and the drive assembly 2 can all be turned, Moreover, they can be locked when they are rotated 90 degrees in the same direction. At this time, the middle four-link folding frame assembly 3 is in the compressed baggage width and the two ends are parallel, and the folded luggage car is formed. The shackles are in parallel with the front hinge sleeve 14 and the rear hinge sleeve 15, and the whole vehicle can be pulled by a telescopic folding handlebar 7 that can be pulled out and folded to a single side; The rod mechanism is hinged to the front hinge sleeve 14 and the rear hinge sleeve 15 respectively. The side of the two side links is a single tube, and the other side is a double tube arrangement, the single tube is in the middle, and the double tube is placed on the outside and clamped thereto. a single tube connected by a connecting rod shaft, thus forming a more stable, symmetrical, uniform force four-bar linkage mechanism composed of six metal tubes; the above-mentioned four-link folding frame assembly 3 and rear wheel, telescopic folding The seat and drive assembly 2, when they are unfolded to form a bicycle frame, can be placed downwardly by providing a frame locking mechanism on the foldable four-bar linkage 13 and on the rear wheel, the telescopic folding seat, and the drive assembly 2. The frame is open to the gauge Position and the steerable rear wheels, the telescopic folding seat, the drive assembly is locked in rotation to a predetermined position.

The above-mentioned frame locking mechanism may be provided with a four-bar linkage locking top block 16 hinged to the lower end end of the double-tube side under the foldable four-bar linkage mechanism 13, which is disposed on the integrated transmission shifting mechanism 9 The wheel direction locking protrusion 20 and the rear wheel direction limiting protrusion 21, when the folding four-bar linkage 13 is unfolded to form the bicycle frame, the lower surface of the connecting rod hinged below the rear hinge sleeve 15 and the integrated transmission shifting mechanism 9 The large faces of the cabinets are parallel and close to each other, but we have to make the folding four-bar linkage 13 unfolded and higher at first, so that we can rotate the four-bar linkage locking top block 16 to the opposite side and try While the top is on the opposite side of the single-link extension end, the integrated transmission shifting mechanism including the rear wheel direction locking projection 20 thereon is rotated under the lower side link of the folding four-bar linkage, due to the rear wheel The direction limiting protrusion 21 is higher than the rear wheel direction locking protrusion 20, and is closer to the lower hinge point of the connecting rod and the rear hinge sleeve 15, and the rotation process is limited by the rear wheel direction limiting protrusion 21, and the rear wheel is at this time The frame formed by the four-bar linkage mechanism is in a straight line, so that when the folded four-bar linkage mechanism that has been partially extended is returned to the predetermined position closely adjacent to the large surface of the integrated transmission shifting mechanism 9, One of the double links hinged under the hinge sleeve 15 is just lying in the gap between the rear wheel direction locking projection 20 and the rear wheel direction limiting projection 21, and the rear wheel direction locking projection 20 also falls into the gap. The gap between the double rods is clamped, so that the direction of the entire steerable rear wheel, the telescopic folding seat, and the drive assembly 2 is locked in the position of the bicycle, and at this time, the four-bar linkage locking top block 16 is also just top. Immediately on the notch of the opposite end of the single-link extension, the downwardly-pressed folded four-bar linkage 13 is restrained and locked when deployed to a prescribed position.

Since the invention is small in size when converted into a luggage cart, the entire pedal mechanism loses its function, but its larger outer contour is highlighted, which is very inconvenient and may turn up, so we can The pedal crank is equipped with an easy-to-remove pedal crank attachment, which can be easily removed when not in use. The convenient removal of the pedal crank attachment includes: a pedal crank locking bolt 17 with a knob, a special fixing cover 18 for the locking bolt and a bolt pin 19, which is characterized in that the special fixing cover 18 for the locking bolt is screwed on the pedal crank. On the outer side of the square hole, the internal thread of the decorative cover is originally installed, and the pedal crank locking bolt 17 with the knob passes through the hole in the center of the special fixing cover 18 of the locking bolt. On the other side of the cover, the pin 19 is used. Or the split pin locks the pedal crank lock bolt 17 with the knob, so that the pedal crank lock bolt 17 with the knob can be rotated on the special bolt cover 18 of the lock bolt to form a dynamic fit, so that the pedal with the knob The crank lock bolt 17 can be used to screw down or screw up and screw the pedal crank together with the foldable foot mounted thereon. Two mounting holes 34 are provided at the same position of the knob end face of the pedal-locking locking bolt with the knob and the special fixing cover of the locking bolt, and the thickness of one of the two mounting holes can be simultaneously inserted. When the appropriate U-shaped iron bar is inserted, the pedal-locking locking bolt with the knob and the special fixing cover of the locking bolt can be relatively fixed, which facilitates the special fixing cover of the locking bolt on the pedal crank. Installation, using the knob on the pedal crank lock bolt with the knob to drive the special fixing cover of the locking bolt to rotate, screw into the dense thread buckle in the pedal crank and tighten, and then take out the U-shaped iron strip in the mounting hole 34 The installation is finished, and the special fixing cover for the locking bolt can be removed smoothly.

The front wheel, the telescopic folding handle direction assembly, the rear wheel, the telescopic folding seat and the driving assembly are respectively provided with a folding luggage rack fixing bolt right angle 22 on the outer side of the outer side thereof for mounting the folding luggage rack 23 and its attachment 24; The folding luggage rack 23 is hinged by three hollow rectangular movable metal rods, and the two luggage rack vertical rods 25 are hinged. At both ends of the crossbar 26, on the other perpendicular surface of the crossbar, there should be a hole at both ends which is hinged to the fixing bolt at the right angle 22 of the folding luggage rack fixing bolt, but only one side is actually Yes, the other end is only provided with a groove matching the fixing bolt at the corresponding place. When the whole vehicle is unfolded to form a bicycle, the luggage rack is folded, and the luggage rack rail 26 is vertically hinged to the folding luggage rack of the front wheel. On the fixing bolts on the right angle 22 of the bolt, the two vertical rods 25 of the roof rack are folded toward each other, and are slightly inclined to be closely attached to the rack rail 26. When the luggage cart is formed according to the present invention, the front and rear wheels are arranged in parallel. At this point, we let the roof rack rail 26 rotate 90 degrees to level, and pour the folding luggage rack fixing bolt of the rear wheel to the fixing bolt of the right angle 22, and fasten it with the groove on it, so that the parallel state of the two wheels is Further lock; this is actually a state of no baggage. If we want to further activate the rack, we must have two racks before the rack rail 26 is rotated 90 degrees. 25 unfolded into a state perpendicular to the roof rail 26, and then rotated 90 degrees to flatten the fastening bolts on the right angle 22 of the folding luggage rack fixing bolts on the opposite side, and finally the two springs on the luggage rack attachment 24 The metal tongue 27 of the button is tightly inserted into the two hollow roof racks 25 which cooperate with it and is locked by the positioning locking means formed by the circular hole corresponding to the spring button on the vertical rod 25 of the luggage rack, so that a complete The luggage rack is formed.

Since the front and rear wheels of the present invention have the same inclination angle, the integrated transmission shifting mechanism 9 is biased to one side, so when folding into a luggage cart, when there is no folding front luggage rack, no heavy objects are available. When loading, the center of gravity of the entire frame is not on the side of the luggage rack but on the back side. In order to ensure that the center of gravity of the vehicle is stable and often kept on one side, the lighter baggage should also be on the side of the center of gravity of the frame. It is reasonable, so a special backpack assembly that replaces the luggage on this side to load and store lighter luggage is required to be hung on the side of the luggage cart, such as a detachable luggage rack attachment for loading the vehicle, and a detachable pedal mechanism. And simple tools, etc.; and also need a special lock single kick 33 on this side to support the whole vehicle including the special backpack at this time, so that it can stand. The dedicated backpack assembly includes a dedicated backpack 28 that is attached to the front wheel, the steering assembly, the rear wheel, the seat, the shoulder bag hook 29 on the drive assembly, and the two shoulders that are placed on the upper portion of the dedicated backpack. The lanyard 30 is wrapped, because the integrated transmission shifting mechanism 9 is also on this side and is relatively convex, so that if the general backpack is placed in the corresponding position and cannot be leveled, the special backpack is integrated. In the conflicting position of the transmission shifting mechanism 9, there is a length-matched vertical zipper 31 that can be pulled to the bottom of the special backpack. After the zipper 31 is pulled apart, the inside is provided with a volume close to the rear side of the integrated transmission shifting mechanism 9. The cloth bag can just fit the protruding portion of the integrated transmission shifting mechanism 9 as a whole, and can simultaneously play the role of the internal volume of the special backpack and the external isolation, so that the special backpack 28 can be substantially flat at this time. The special lock single kick 33 is a single kick with an increased folding angle, so that the single kick can be fastened to the rear side of the box of the integrated transmission shifting mechanism 9 in case the bicycle is deformed into a bicycle. It collides with the running pedal mechanism 10.

Claims

claims

1. A folding luggage cart that can be unfolded to form a bicycle, characterized by: It consists of a front wheel, a telescopic folding handle direction component 1, a rear wheel, a telescopic folding seat, a driving component 2 and a four-link structure in the middle and the front and rear components that are hinged up and down respectively. The front wheel and handlebar direction assembly is composed of a front wheel 4, a front fork 5, a front frame hinge rod 6 fixedly connected to the upper end of the front fork, and a retractable and foldable bicycle with a handlebar. Make up 7. It is characterized in that the handlebar of the telescopic, folding handlebar 7 can be pulled out from the lower half of the front frame hinge rod 6 and locked by a positioning locking device. The middle part of the left and right handlebars of the telescopic and foldable handlebar 7 is hinged and in a relatively locked state through the positioning locking device. Only half of the handlebars are fixedly connected to the handlebar, and the other half can be folded from above when needed. on the opposite side, so that when transformed into a luggage cart, it can be folded into a state where the left and right handles are on the same side; the rear wheel, telescopic folding seat, and drive assembly 2 are composed of the rear wheel 8, the integrated transmission transmission mechanism 9, and the pedal mechanism 10. It is composed of a rear frame hinge rod 11 fixedly connected to the upper end of the integrated transmission transmission mechanism 9 and a retractable folding seat 12 with a seat rod. The characteristic is that the seat rod can be pulled out from the rear frame hinge rod 11 and It is locked by a positioning locking device; the four-link folding frame assembly 3 includes a foldable four-link mechanism 13 in the middle, which is hinged to the upper and lower parts of the four-link mechanism and is rotatable with the hinged rod 6 of the front frame. The front hinge sleeve 14 is connected with the four-bar linkage mechanism and the rear hinge sleeve 15 is rotatably connected with the rear frame hinge rod 11. The characteristic is that when the four-bar linkage is connected, When the rod folding frame assembly 3 is laterally opened to become a bicycle frame, in fact, the front and rear two quadrangular quadrilaterals formed by the front hinge sleeve 14 and the rear hinge sleeve 15 and the middle foldable four-bar linkage mechanism 13 are hinged. All sides are unequal and are not parallelograms. If the positions of all the movable connecting axes between the mutually articulated four-links are properly selected, the four-link folding frame assembly 3 can be cleverly formed with the The rotatable sleeved front wheel, telescopic folding handlebar steering assembly and rear wheel, telescopic folding seat, and drive assembly are parallel when folded and compressed to the width of the luggage cart, and can form the front wheel of the bicycle when unfolded into a bicycle frame. , the telescopic and folding handle direction assembly, the rear wheel, the telescopic and folding seat, and the drive assembly each form a required tilt angle with the ground, a stable trapezoidal state; the front wheel, the telescopic and folding handle direction assembly 1 and the rear wheel, telescopic The characteristics of the folding seat and drive assembly 2 are that they can both be turned, and they can be locked when they are both turned 90 degrees in the same direction. At this time, the middle four-link folding frame assembly 3 is at the compressed width of the luggage trolley and the two sides. When the ends are in a parallel state, the two wheels of the folded luggage trolley, the front hinge sleeve 14 and the rear hinge sleeve 15 are all parallel, and the entire vehicle can be pulled out and folded to one side through telescopic folding. The handlebar 7 is used as a handle for pulling; the foldable four-bar linkage is characterized in that one side of the two side links hinged to the front hinge sleeve 14 and the rear hinge sleeve 15 is a single tube, and the other side is a single tube. It is a double-tube arrangement, with a single tube in the middle, and the double tubes are placed on the outside to clamp the single tube connected to it through the connecting rod shaft. This forms a more stable, symmetrical, and evenly stressed movable four-tube link composed of six metal tubes. The characteristic of the four-link folding frame assembly 3, the rear wheel, the telescopic folding seat, and the drive assembly 2 is that when they are unfolded to form a bicycle frame, they can be mounted on the foldable four-link mechanism 13 and A frame locking mechanism is provided on the rear wheel, telescopic folding seat, and drive assembly 2. The downward pressure-bearing frame is opened to a specified position and the steerable rear wheel, telescopic folding seat, and driving assembly are rotated to a specified position. locking.

2. The frame locking mechanism according to claim 1, characterized in that a four-bar link mechanism locking top block 16 hinged thereto can be provided at the extension end of the lower end of the double-tube side below the foldable four-bar link mechanism 13. The rear wheel direction locking protrusion 20 and the rear wheel direction limiting protrusion 21 are provided on the upper box plane of the integrated transmission transmission mechanism 9. When the folding four-bar linkage mechanism 13 is unfolded to form a bicycle frame, it is connected with the rear hinge sleeve 15 The lower surface of the hinged connecting rod below should be parallel to and close to the upper surface of the integrated transmission transmission mechanism 9 case, but we need to expand the folding four-bar linkage mechanism 13 further and higher at the beginning, so that we can The four-link mechanism locking top block 16 rotates to the opposite side and attempts to press against the gap at the opposite side of the single-link extended end. At the same time, the integrated transmission transmission mechanism including the rear wheel direction locking protrusion 20 thereon is rotated to fold. Under the lower link of the four-bar linkage mechanism, since the rear wheel direction limiting protrusion 21 is higher than the rear wheel direction locking protrusion 20 and is closer to the lower hinge point of the connecting rod and the rear hinge sleeve 15, the rotation process is delayed. The wheel direction limit protrusion 21 is limited. At this time, the rear wheel should be in a straight line with the frame formed by the four-bar linkage. In this way, when the folded four-bar linkage is unfolded a little too much, it will fall back to the integrated transmission speed change. When the large surface of the mechanism 9 is in close contact with the specified position, one of the double links hinged below the rear hinge sleeve 15 just lies on the rear wheel direction locking protrusion 20 and the rear wheel direction limiting protrusion. Claims

21, the rear wheel direction locking protrusion 20 also happens to fall into the gap between the double rods and is clamped, so that the direction of the entire steerable rear wheel, telescopic folding seat, and drive assembly 2 is locked. At this time, the locking top block 16 of the four-bar linkage mechanism is also just pressed against the gap at the extended end of the single link on the opposite side, so that the folding four-bar linkage mechanism 13, which bears downward pressure, is unfolded to the specified position. Limited and locked.

3. The foot pedal mechanism according to claim 1, characterized in that, a foot pedal crank accessory can be installed on its foot crank for easy disassembly; the foot pedal crank accessory for easy disassembly includes a foot pedal with a knob. The crank locking bolt 17, the special fixing cover 18 for the locking bolt and the bolt pin 19 are characterized in that the special fixing cover 18 for the locking bolt is screwed on the dense internal thread of the decorative cover originally installed outside the square hole of the pedal crank. , the pedal crank locking bolt 17 with a knob passes through the hole in the center of the special fixing cover 18 for the locking bolt. On the other side of the cover, use a pin 19 or a cotter pin to secure the pedal crank locking bolt with a knob. 17 is locked, so that the pedal crank locking bolt 17 with a knob can rotate on the special fixing cover 18 of the locking bolt to form a dynamic fit, so that the pedal crank locking bolt 17 with a knob can connect the pedal crank and other The foldable pedals installed on the pedal can be unscrewed or screwed up and tightened together through the knob. In addition, the end face of the knob of the locking bolt of the pedal crank with a knob and the special fixing cover of the locking bolt are at the same position. Two mounting holes 34 are also provided.

4. The front wheel, telescopic folding handle direction assembly 1, rear wheel, telescopic folding seat, and drive assembly 2 according to claim 1, characterized in that a folding luggage rack fixing bolt right angle 22 is installed on their outer lower sides. Used to install the folding luggage rack 23 and its accessories 24; the folding luggage rack 23 is hinged by three hollow rectangular movable metal rods, and the two luggage rack longitudinal bars 25 are hinged at both ends of the luggage rack cross bar 26 , on the other perpendicular surface of this crossbar, there should be garden holes at both ends that are hinged to the fixing bolts on the folding luggage rack fixing bolts 22 at right angles, but in fact only one side has them, then the other end is in the corresponding Only grooves matching the fixing bolts are provided in the places. When the whole vehicle is unfolded to form a bicycle, the luggage rack is folded, and the luggage rack cross bar 26 is vertically hinged to the fixing bolts on the right angles 22 of the folding luggage rack fixing bolts of the front wheel. On the luggage rack, the two luggage rack longitudinal bars 25 are folded end-to-end and are slightly tilted and closely connected with the luggage rack crossbar 26. When the luggage trolley is formed according to the present invention, the front and rear wheels are arranged in parallel. At this time, we make the luggage rack horizontal Rotate the rod 26 90 degrees and lay it flat, put it on the fixed bolt of the rear wheel folding luggage rack at right angle 22, and fasten it with the groove on it, so that the parallel state of the two wheels is further locked; this is actually a In the state of not carrying luggage, if we want to further enable this folding luggage rack, we must unfold the two luggage rack longitudinal bars 25 into a state perpendicular to the luggage rack crossbar 26 before the luggage rack crossbar 26 is rotated 90 degrees and flattened. , then turn it 90 degrees and lay it flat, fasten and lock it with the fixing bolts on the opposite side of the folding luggage rack fixing bolt 22, and finally insert the two metal tongues 27 with spring buttons on the luggage rack attachment 24 tightly. The two hollow luggage rack longitudinal rods 25 that cooperate with it are locked by the positioning locking device formed by the garden hole corresponding to the spring button on the luggage rack longitudinal rod 25, so a complete luggage rack is formed.

5. The front wheel, telescopic folding handle direction assembly 1, rear wheel, telescopic folding seat, drive assembly 2 and four-link folding frame assembly 3 according to claim 1, characterized in that, when folded into a luggage cart , on the rear side where the center of gravity of the entire frame is biased, that is, on the side where the integrated transmission transmission mechanism 9 is biased, a special backpack assembly for carrying lighter luggage can be provided, and a special belt for supporting them and the entire vehicle at this time Lock single kick 33; the special backpack assembly includes a special backpack 28, a backpack hook 29 respectively fixed on the front wheel, handlebar steering assembly, rear wheel, seat, and drive assembly, and a backpack hook 29 provided on the upper part of the special backpack. Two matching backpack straps 30; the special backpack 28 is provided with a vertical zipper 31 of matching length that can be pulled to the bottom of the special backpack at the place where it conflicts with the integrated transmission transmission mechanism 9. After the zipper 31 is opened, there is a cloth bag inside that is close to the volume of the rear box of the integrated transmission and transmission mechanism 9, which can just fit the protruding part of the integrated transmission and transmission mechanism 9 into it as a whole; the special locking single kick 33 It is a single kick with an enlarged folding angle, ensuring that the single kick can be closely attached to the rear side of the integrated transmission transmission mechanism 9 case when it is kicked up, to prevent it from interfering with the running pedal mechanism 10 when the invention is transformed into a bicycle. conflict.