CN116812051A - A bicycle that can be folded to form a two-wheeled parallel cart - Google Patents

Abstract

The invention discloses a bicycle that can be folded to form a two-wheeled parallel cart, which includes a front part, a rear part and a folding beam part. The folding beam part is used to connect the front part and the rear part front and rear, so The folding car beam part includes a folding car beam and a reinforced car beam. The folding car beam is located on the upper part of the reinforced car beam. The folding car beam includes a first car beam and a second car beam. The first car beam and The second vehicle beam is hingedly matched and folds and rotates in a horizontal direction. The front end of the first vehicle beam is mounted in conjunction with the front vehicle portion. The second vehicle beam is hingedly coupled with the rear vehicle portion. The second vehicle beam is hingedly coupled with the rear vehicle portion. The rear car part folds and rotates in a horizontal direction, and the two ends of the reinforced car beam cooperate with the front car part and the rear car part respectively, one end of which is a hinged fit and the other end is a detachable installation fit. The invention optimizes the overall frame structure, can realize the folding of bicycles with multiple wheel diameters, and is convenient for promotion and use after folding.

Description

A bicycle that can be folded to form a two-wheeled parallel cart

Technical field

The present invention relates to the technical field of bicycles, and in particular to a bicycle that can be folded to form a two-wheeled parallel cart.

Background technique

There are many types of folding bicycles currently popular on the market, and there are many folding methods. The common purpose of folding them is to reduce the size of the bicycle and make it easier to carry, store and store. Although such folding bicycles effectively reduce their size in the folded state, most of them lose the function of normal riding or pushing on the ground, especially in some situations that are not suitable for riding but require walking long distances. , although it can be folded and carried in a reduced size, it still requires the user to carry it by hand or shoulder, which is laborious and inconvenient, and sometimes even becomes a burden when traveling. The function of current folding bicycles is limited to changing the appearance size, reducing the space required for storage and making it easy to carry.

For example, the announcement number CN207631413U discloses a bicycle folding mechanism with simple structure, high folding efficiency and good passability. It includes: a telescopic front bracket assembly, a telescopic main bracket assembly, a head tube assembly, and a saddle. The seat assembly and a rear wheel assembly; one end of the head tube assembly is pivotably connected to the front bracket assembly, and the other end is pivotably connected to the main bracket assembly; the saddle assembly has a a seat tube that is pivotably connected to the main bracket assembly; the rear wheel assembly has a rear wheel fork that is pivotably connected to the main bracket and is disposed between the rear wheel fork and the seat tube The rear wheel fork connecting rods are connected by rotating shafts.

For example, the announcement number is CN213620094U. A folding bicycle includes a frame, a seat tube and a head tube connected to the frame. The frame includes a riser, a head tube, and a cross beam connected between the riser and the head pipe. Both the front end and the rear end of the beam can be folded, and the folding direction of the front end of the beam is opposite to the folding direction of the rear end of the beam; the lower side of the head tube can be folded vertically. The folding bicycle provided by the embodiment of the present application can be folded at the front end of the crossbeam so that the front end of the bicycle is folded toward the side of the vehicle body, and can also be folded at the rear end of the crossbeam so that the bicycle is folded from the middle and the head tube can be directed downwards. Fold so that the handlebars are folded to the side of the front wheel of the bicycle.

However, most existing folding bicycles usually adopt small wheel diameter specifications, and their wheel sizes are usually 20, 16 inches or even smaller, resulting in poor passability and relatively poor comfort when riding. The speed is relatively slow. Existing bicycles with large wheel diameters are usually 26 inches or larger, and such bicycles usually cannot achieve a good folding effect. Usually, the front or rear wheels need to be quickly detached to reduce the size. , after disassembly and folding, the function of moving by using the wheels is lost, and the user needs to carry it by himself, which is laborious and troublesome. Some bicycles with a folding structure are still large in size after folding, and are not compact enough, which affects the use effect; at the same time, for existing small wheels Folding bicycles of various diameters usually adopt a single main beam and double bar folding structure, resulting in relatively poor stability of the overall frame.

Contents of the invention

In view of the above problems, the present invention aims to provide a bicycle that can be folded to form a two-wheeled parallel cart, which optimizes the overall frame structure, can realize the folding of bicycles with multiple wheel diameters, and can be easily folded and used for promotion.

The technical problems solved by the present invention can be achieved by adopting the following technical solutions:

A bicycle that can be folded to form a two-wheeled parallel cart, including a front part, a rear part and a folding beam part. The folding beam part is used to connect the front part and the rear part front and rear. The folding beam part The folding car beam includes a folding car beam and a reinforced car beam. The folding car beam is located on the upper part of the reinforced car beam. The folding car beam includes a first car beam and a second car beam. The first car beam and the second car beam are The vehicle beam is hingedly matched and folded and rotated in the horizontal direction. The front end of the first vehicle beam is installed in conjunction with the front vehicle portion. The second vehicle beam is hingedly matched with the rear vehicle portion. The second vehicle beam is hingedly coupled with the rear vehicle portion. The reinforced vehicle beam is folded and rotated in a horizontal direction. One end of the reinforced vehicle beam is hinged and the other end is detachably mounted.

When the detachable end of the reinforced vehicle beam is completely disassembled, the first vehicle beam drives the front vehicle part to fold horizontally relative to the second vehicle beam to form a 90° fit, and the second vehicle beam moves horizontally relative to the rear vehicle part. The directions are folded to form a 90° fit, so that the front wheels in the front vehicle part and the rear wheels in the rear vehicle part are in a parallel state, and the two wheels are in a concentric position.

The hinge structure of the first vehicle beam and the second vehicle beam, and the hinge structure of the second vehicle beam and the rear vehicle part all adopt a hinge structure that can be limited and locked.

The front vehicle part includes a handlebar part, a vehicle tube part and a front wheel. The vehicle tube part is provided with a first mounting seat and a second mounting seat, and the first mounting seat is used to cooperate with the first vehicle beam, The second mounting seat is used to cooperate with the reinforced vehicle beam; the handlebar portion includes handlebars at both ends and handlebar tubes connecting the handlebars at both ends. The handlebars are in a folded structure relative to the handlebar tubes. The lower part of the handlebar tube is fixedly matched with the vehicle tube part, and the lower part of the vehicle tube part is matched with the wheel through the front fork.

The front vehicle part includes a handlebar part, a vehicle tube part and a front wheel. The vehicle tube part is provided with a fifth mounting seat, and the fifth mounting seat is used to fixedly cooperate with the first vehicle beam. The lower part of the vehicle beam is also matched with the fifth mounting seat through a reinforced beam tube. One end of the first vehicle beam and the reinforced vehicle beam are detachably fixed, and the other end of the reinforced vehicle beam is hingedly matched with the rear vehicle part.

The reinforced vehicle beam includes reinforced cross beams and reinforced inclined beams. A triangular structure is formed between the reinforced cross beams, reinforced inclined beams and longitudinal beams. The reinforced cross beams and reinforced inclined beams cooperate with the longitudinal beams in a hinged structure.

The reinforced vehicle beam includes a reinforced fixed beam and a reinforced movable beam. The reinforced fixed beam is located at the lower part of the first vehicle beam. The other end of the reinforced fixed beam is used to hingely cooperate with the reinforced movable beam. The other end of the reinforced movable beam is used with the reinforced movable beam. The second crossbeam is butt-connected and is removably and fixedly installed with the first crossbeam or/and the second crossbeam.

The rear vehicle part includes a vehicle frame. The vehicle frame includes a rear main beam and a docking beam assembly. The docking beam assembly is used to cooperate with the folding vehicle beam part and the reinforcing vehicle beam. The docking beam assembly includes a first cross beam, a second cross beam, and a second cross beam. Cross beams and longitudinal beams, the first cross beam continues to extend toward the front of the vehicle relative to the longitudinal beams, and the first cross beam and the reinforced moving beam overlap in parallel up and down along the vertical direction.

The rear vehicle part includes a vehicle seat, a vehicle frame and a rear wheel. The vehicle seat is located on the upper part of the vehicle frame. The vehicle frame includes a rear vehicle main beam, a butt beam assembly and a rear fork. The butt beam assembly and the rear fork Both are fixedly installed with the rear main beam, the docking beam assembly is used to cooperate with the folding vehicle beam part, and the rear fork is used to cooperate with the rear wheel.

The docking beam assembly includes a first cross beam, a second cross beam and a longitudinal beam. A third mounting seat is provided at the joint between the first beam and the longitudinal beam. The third mounting seat is used to cooperate with the second vehicle beam. A fourth mounting seat is provided at the joint between the second cross beam and the longitudinal beam, and the fourth mounting seat is used for installation in conjunction with the reinforced vehicle beam.

The first car beam, the second car beam and the first cross beam are folded with each other to form a "凵" shaped structure.

The second mounting seat and the reinforced vehicle beam are detachably installed and matched, the fourth mounting seat and the reinforced vehicle beam are hingedly matched, and the hinge structure of the fourth mounting seat and the reinforced vehicle beam adopts a hinge structure that can be limited and locked. .

The second mounting seat and the reinforced vehicle beam adopt a hinged fit. The hinge structure of the second mounting seat and the reinforced vehicle beam adopts a limitable and lockable hinge structure. The fourth mounting seat and the reinforced vehicle beam adopt a detachable installation fit. .

Compared with the existing technology, the present invention has the following beneficial effects: by optimizing the overall frame structure, the present invention has a simple and practical structure, and the optimized use of folding beams can realize the folding of the bicycle to form a cart structure, which is convenient for users to use in special environments. The wheels can be used to push the vehicle for easy transportation; at the same time, a reinforced beam is added to improve the stability of the overall frame, and a single-end detachable structure is used to facilitate folding and matching with the folding beam.

The characteristics of the present invention can be clearly understood by referring to the drawings of the present invention and the following detailed description of the preferred embodiments.

Description of the drawings

Figure 1 is a schematic structural diagram of the bicycle riding state according to the present invention;

Figure 2 is a schematic structural diagram of the bicycle riding state of the present invention;

Figure 3 is a schematic structural diagram of the bicycle reinforced beam of the present invention in a disassembled state;

Figure 4 is a schematic structural diagram of the folding stroller state of the present invention;

Figure 5 is a schematic diagram 3 of the bicycle riding state structure of the present invention;

Figure 6 is a partially enlarged structural diagram of part A in Figure 5;

Figure 7 is a schematic diagram 2 of the state structure of the folding stroller of the present invention;

Figure 8 is a partially enlarged structural diagram of part B in Figure 7;

Figure 9 is a schematic structural diagram 4 of the bicycle riding state according to the present invention;

Figure 10 is a schematic structural diagram of the folding vehicle beam portion of the present invention;

Figure 11 is a schematic diagram 2 of the structure of the bicycle reinforced beam in the disassembled state according to the present invention;

Figure 12 is a schematic diagram three of the state structure of the folding stroller of the present invention;

Figure 13 is a schematic diagram 5 of the bicycle riding state structure of the present invention;

Figure 14 is a schematic structural diagram three of the bicycle reinforced beam of the present invention in a disassembled state;

Figure 15 is a schematic diagram 4 of the structure of the bicycle reinforced beam of the present invention in a disassembled state;

Figure 16 is a schematic structural diagram of the folding vehicle beam state of the present invention;

Figure 17 is a second structural schematic diagram of the folding beam state of the present invention;

Figure 18 is a schematic diagram 4 of the state structure of the folding stroller of the present invention.

Detailed ways

In order to make it easy to understand the technical means, creative features, objectives and effects of the present invention, the present invention will be further explained below in conjunction with specific illustrations.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiment of the present invention are only used to explain each direction in a certain posture (as shown in the accompanying drawings). The relative positional relationship between components, movement conditions, etc., if the specific posture changes, the directional indication will also change accordingly. In addition, descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features.

Example 1

As shown in Figures 1 to 8, this embodiment discloses a bicycle that can be folded to form a two-wheeled parallel cart, which is particularly suitable for bicycles with large wheel diameters, including a front bicycle part 100, a rear bicycle part 300 and a folding bicycle. The beam part 200 and the folding beam part 200 are used to connect the front part 100 and the rear part 300 front and back to form an overall bicycle structure. The folding beam part 200 can be folded and folded to form two different states, namely bicycle Riding status and folding stroller status.

In a specific structure, the front vehicle part 100 includes a handlebar part 110, a vehicle tube part 120 and a front wheel 130. The vehicle tube part 120 is provided with a first mounting seat 121 and a second mounting seat 122. The first mounting seat 121 is used to Cooperating with the first vehicle beam 211, the first mounting seat 121 can be the welding part of the first vehicle beam 211 and the vehicle tube part 120. The first vehicle beam 211 and the vehicle tube part 120 are directly welded and fixed into one body. The second mounting seat 122 is used to cooperate with the reinforced vehicle beam 220; the handlebar portion 110 includes handlebars 112 at both ends and handlebar tubes 111 connecting the handlebars 112 at both ends. The handlebars 112 are in a folded structure relative to the handlebar tubes 112, wherein the handlebars 112 The handlebar tube 111 can preferably adopt a limitable and lockable hinge structure, which is usually a downward folding structure. Depending on the specific use, it can be double folded or unilaterally folded. The lower part of the handlebar tube 111 is fixedly matched with the vehicle tube part 120 , the lower part of the vehicle tube part 120 cooperates with the wheel 130 through the front fork 123.

In the specific structure, the rear vehicle part 300 includes a vehicle seat 310, a vehicle frame 320 and a rear wheel 330. The vehicle seat 310 is located on the upper part of the vehicle frame 320. The vehicle frame 320 includes a rear vehicle main beam 323, a docking beam assembly and a rear fork 327. The docking The beam assembly and the rear fork 327 are both fixedly installed with the rear main beam 323. The butt beam assembly is used to cooperate with the folding beam part 200, and the rear fork 327 is used to cooperate with the rear wheel 330. Among them, at the lower part of the rear fork 327 A rear reinforcing beam 340 is usually disposed between the rear main beam 323 and the lower part of the rear main beam 323, so that the rear reinforcing beam 340, the rear fork 327 and the rear main beam 323 form a triangular structure to increase the overall stability of the frame 320. At the same time, the rear main beam 323. A sprocket assembly is usually provided at the intersection between the docking beam assembly and the rear reinforcing beam 340. The sprocket assembly includes components such as chains, front teeth, and pedals.

Further, the butt beam assembly includes a first cross beam 324, a second cross beam 325 and a longitudinal beam 326. A third mounting seat 321 is provided at the joint between the first beam 324 and the longitudinal beam 326. The third mounting seat 321 is used to connect with the second vehicle beam. 212, a fourth mounting base 322 is provided at the joint between the second crossbeam 325 and the longitudinal beam 326, and the fourth mounting base 322 is used to be installed in conjunction with the reinforced vehicle beam 220; among them, the first crossbeam 324, the second crossbeam 325, the longitudinal The beam 326 and the rear main beam 323 form a triangular structure, in which the first cross beam 324 and the second cross beam 325 are parallel to each other to increase the overall stability of the vehicle frame 320.

In a specific structure, the folding beam part 200 includes a folding beam 210 and a reinforced beam 220. The folding beam 210 is located on the upper part of the reinforced beam 220. The folding beam 210 includes a first beam 211 and a second beam 212. The first car beam 211 and the second car beam 212 are hingedly matched and folded and rotated in the horizontal direction. The front end of the first car beam 211 is installed with the front car part 100, preferably a fixed installation structure. The second car beam 212 is connected with the rear car part 300. The second car beam 212 and the rear car part 300 fold and rotate in the horizontal direction. Specifically, they are concentrically arranged. The two ends of the reinforced car beam 220 cooperate with the front car part 100 and the rear car part 300 respectively, and one end is hinged. , the other end is a removable installation fit.

When in the bicycle riding state, the first vehicle beam 211 and the second vehicle beam 212 are in the same axial state and remain coaxial with the first crossbeam 324, and the reinforced vehicle beam 220 and the second crossbeam 325 are in a coaxial state. , so that the first vehicle beam 211 and the second vehicle beam 212 are parallel up and down relative to the reinforced vehicle beam 220, and the front vehicle portion 100 and the rear vehicle portion 300 are arranged at both ends of the folded vehicle beam portion to form a rideable state; here, each The hinged active areas of the components are all in a locked state.

When the cart needs to be in the folding state, after the reinforced cart beam 220 is disassembled through the detachable end, the first cart beam 211 drives the front cart part to fold in the horizontal direction relative to the second cart beam 212 to form a 90° fit. The second cart beam 212 The rear vehicle part 300 is folded in the horizontal direction to form a 90° fit. The first vehicle beam 211, the second vehicle beam 212 and the first cross member 324 are folded with each other to form an "O" shape structure, so that the front wheels in the front vehicle part 100 130 and the rear wheel 330 in the rear car part 300 are in a parallel state, and the two wheels are in a concentric position; the front car part 100 and the rear car part 300 are arranged on the same side, in which the reinforced beam 220 can be moved after being disassembled at one end. Folded, it is convenient for users to carry and push.

In one of the preferred embodiments, the second mounting seat 122 and the reinforced vehicle beam 220 adopt a detachable installation fit, the fourth mounting seat 322 and the reinforced vehicle beam 220 adopt a hinged fit, and the fourth mounting seat 322 and the reinforced vehicle beam 220 are hingedly connected. The structure adopts a hinge structure that can be limited and locked; among them, the detachable installation structure adopts mutually docking lifting lugs and is coaxially fixed through detachable lock pins. In addition, the detachable installation structure can also adopt snap-on and plug-in connections. , locks and other detachable structures commonly used in the existing technology.

In one of the preferred embodiments, the second mounting seat 122 and the reinforced vehicle beam 220 adopt a hinged fit. The hinge structure of the second mounting seat 122 and the reinforced vehicle beam 220 adopts a limitable and lockable hinge structure. The fourth mounting seat 322 It adopts detachable installation and matching with the reinforced vehicle beam 220; among them, the detachable installation structure adopts mutually docking lifting lugs and is coaxially fixed through detachable lock pins. In addition, the detachable installation structure can also adopt snap-on or plug-in connections. , locks and other detachable structures commonly used in the existing technology.

In combination with the above, the hinge structure of the first vehicle beam 211 and the second vehicle beam 212, and the hinge structure of the second vehicle beam 212 and the rear vehicle part 300 all adopt a hinge structure that can be limited and locked. The hinge structure can be limited and locked. The structure can be applied to corresponding specifications according to the usage requirements; in addition, the hinge structure of the fourth mounting seat 322 and the reinforced vehicle beam 220 adopts a hinge structure that can be limited and locked; or the hinge structure of the second mounting seat 122 and the reinforced vehicle beam 220 A hinge structure that can be limited and locked is used; among them, the hinge structure that can be limited and locked is a common design in the prior art, such as the announcement number is CN203041514U, which discloses a locking hinge mechanism for a foldable playground frame; such as The announcement number is CN203835894U, which discloses a 90° elbow quick-locking two-dimensional hinged assembly; in addition, it is preferred to use the applicant's independently developed application number 2022209275565, which is called a multi-angle limit hinge for connecting rod-shaped components. mechanism.

By optimizing the overall frame structure, the present invention has a simple and practical structure. By optimizing the use of folding beams, bicycles with large wheel diameters can be folded to form a cart structure, which is convenient for users to use in special environments and facilitate transportation; it can also be applied to other specifications. Automatic vehicles with wheel diameters can be folded for use; at the same time, a reinforced vehicle beam is added to improve the stability of the overall frame, and a single-end detachable structure is used to facilitate folding and matching with the folding vehicle beam.

Example 2

Based on Embodiment 1, as shown in Figures 9 to 12, this embodiment discloses a bicycle that can be folded to form a two-wheeled parallel cart, which is particularly suitable for bicycles with large wheel diameters.

Among them, the alternative feature of this embodiment and Embodiment 1 is that the reinforced vehicle beam 220 of the single-beam structure used in Embodiment 1 is optimized and improved. Specifically, the front vehicle portion 100 includes a handlebar portion 110 and a vehicle tube portion 120 and the front wheel 130. The vehicle tube portion 120 is provided with a fifth mounting seat 124. The fifth mounting seat 124 is used to fixedly cooperate with the first vehicle beam 211. The lower part of the first vehicle beam 211 is also connected to the fifth mounting seat through the reinforcing beam tube 125. The base 124 cooperates, one end of the first vehicle beam 211 and the reinforced vehicle beam 220 are detachably fixed, and the other end of the reinforced vehicle beam 220 is articulated with the rear vehicle part 300. The butt beam assembly of the frame 320 in the rear vehicle part 300 is The second beam structure is removed to facilitate the rotation of the vehicle beam 220.

The reinforced vehicle beam 220 includes a reinforced cross beam 221 and a reinforced inclined beam 222. A triangular structure is formed between the reinforced cross beam 221, the reinforced inclined beam 222 and the longitudinal beam 326. The reinforced cross beam 221, the reinforced inclined beam 222 and the longitudinal beam 326 all adopt a hinged structure.

After the reinforced beam 220 is optimized, a triangular structure is formed between the reinforced cross beam 221, the reinforced oblique beam 222 and the longitudinal beam 326 to increase the stability of the overall frame.

The hinge structures used in this embodiment all adopt the hinge structures corresponding to those in Embodiment 1, preferably a hinge structure that can be limited and locked.

In this embodiment, the overall frame has fewer movable mechanisms, and each component of the frame body forms a triangular stable structure with each other, which ensures good force-bearing performance when the vehicle is in use, and also ensures that the frame has good rigidity and stability. sex.

Example 3

Based on Embodiment 1, as shown in FIGS. 13 to 18 , this embodiment discloses a bicycle that can be folded to form a two-wheeled parallel cart, which is suitable for bicycles with small wheel diameters.

Among them, the replacement feature of this embodiment and Embodiment 1 is: the single-beam structure reinforced vehicle beam 220 used in Embodiment 1 is optimized and improved. Specifically, the reinforced vehicle beam 220 includes a reinforced fixed beam 223 and a reinforced movable beam 224. The reinforced fixed beam 223 is located at the lower part of the first vehicle beam 211. The other end of the reinforced fixed beam 223 is used to hingely cooperate with the reinforced moving beam 224. The other end of the reinforced moving beam 224 is used to dock with the second cross beam 325 and with the first cross beam 324. Detachable and fixed installation; the rear vehicle part 300 includes a vehicle frame 320, and the vehicle frame 320 includes a rear vehicle main beam 323 and a docking beam assembly. The docking beam assembly is used to cooperate with the folding vehicle beam part 210 and the reinforced vehicle beam 220. The docking beam assembly includes a third A transverse beam 324, a second transverse beam 325 and a longitudinal beam 326. The first transverse beam 324 continues to extend toward the front vehicle part 100 relative to the longitudinal beam 326. The first transverse beam 324 and the reinforced moving beam 224 overlap vertically in parallel along the vertical direction.

Optimize the design and lengthen the first cross beam 324 to overlap with the reinforced movable beam 224. The double beam can be fixed up and down through the detachable fixed structure. In the preferred design, the first beam 211 and the reinforced fixed beam 223 are The joints are preferably connected and fixed by bolts, so that the folding beams and reinforced beams achieve a stronger overall structure.

In one of the preferred embodiments, both the first crossbeam 324 and the second crossbeam 325 are designed with a lengthened extension structure, in which the longitudinal beam 326 structure can be fixedly installed with the second crossbeam 325, and the other ends of the first crossbeam 324 and the second crossbeam 325 are both The sixth mounting base 350 is fixedly installed and matched, and the sixth mounting base 350 is located on the rear main beam 323 of the vehicle frame 320; a seventh mounting base 230 is provided at the other end of the first cross beam 324 and the second cross beam 325, wherein the seventh mounting base 230 is The seat 230 respectively includes an upper collar 232 for fixed installation with the first cross beam 324 and a lower collar 231 for fixed installation with the second cross beam 325, and a docking groove 233 is provided at the outer end of the lower collar 231. The docking groove 233 has A locking hole 234 is provided, and a lock pin seat 250 is provided at the end of the reinforced moving beam 224. The lock pin seat 250 is provided with a locking pin 251. When the reinforced moving beam 224 completes the docking with the second cross beam 325, the lock pin 250 is provided at the end. The pin seat 251 is installed in cooperation with the docking groove 233, and through the fixation of the lock pin 251 and the locking hole 234, the fixed installation of the reinforced moving beam 224 is realized.

Among them, an eighth mounting base 240 is preferably provided at the end of the reinforced fixed beam 223 and the end of the first vehicle beam 211. The eighth mounting base 240 preferably adopts an "8"-shaped ring sleeve structure to facilitate the fixation of the double beams; in the remaining In embodiments, other structures may also be used for installation and fixation.

In this embodiment, the longitudinal beam 326 is shortened while retaining the length specifications of the reinforced beam 220 and the folding beam 210. By utilizing structural optimization, it can be suitable for use on folding bicycles with small wheel diameters. This structure is easy to disassemble and fold. .

In the overall structure, the first cross beam 324 and the first vehicle beam 211 are preferably fixed structures with the rear vehicle part 300 and the front vehicle part 100 respectively, usually by welding and fixed as one body. A second beam 212 is provided. Both ends of the second beam 212 are hingedly matched with the first cross beam 324 and the first beam 211 respectively, so that the horizontal folding arrangement can be realized; the second cross beam 325 and the reinforced fixed beam 223 are respectively connected with the rear car part. 300 and the front car part 100 preferably adopt a fixed structure, usually welded and fixed as one body. A reinforced moving beam 224 is provided between the second cross beam 325 and the reinforced fixed beam 223, wherein the reinforced moving beam 224 and the reinforced fixed beam 223 are preferably A hinged structure is used, and the other end adopts a detachable fixed structure with the superimposed first cross beam 324. In other embodiments, the end of the second cross beam 325 can also be replaced with a detachable fixed structure.

When the vehicle is unfolded, the first cross beam 324, the second beam 212, and the first beam 211 form an upper beam structure as a whole, and the second cross beam 325, the reinforced movable beam 224, and the reinforced fixed beam 223 form a lower beam structure. The upper and lower vehicle beams can also be docked and fixed through fasteners, thereby forming an integral vehicle beam structure with good stability.

When the vehicle is folded, the reinforced movable beam 224 completes the disassembly and separation from the first cross beam 324 or the second cross beam 325, and the reinforced movable beam 224 is rotated to other positions through hinged cooperation with the reinforced fixed beam 223; The first cross beam 324, the second vehicle beam 212 and the first vehicle beam 211 are folded according to the corresponding folding structures in Embodiment 1, so that the front vehicle part 100 and the rear vehicle part 300 realize parallel wheels.

In one of the preferred embodiments, as shown in FIGS. 15 and 16 , the second vehicle beam 212 can be designed with a telescopic rod structure, preferably a double-rod telescopic structure, because the second vehicle beam 212 is subject to stress during the overall riding process. The force interference is relatively small. For this reason, in order to have a better stroller space after folding to form a stroller structure, it is preferred to set the second cart beam 212 as a telescopic structure, and form a cart with a larger space after stretching, thereby improving Product usage effects.

In other structures, the handlebar portion 110, the vehicle tube portion 120, the rear main beam 323 and other structures may preferably adopt a telescopic structure, in which the handlebar portion 110 may adopt a folding structure or other designs.

The hinge structures used in this embodiment all adopt the hinge structures corresponding to those in Embodiment 1, preferably a hinge structure that can be limited and locked.

Compared with Embodiment 1, this embodiment adds a fixed connection link, increases the overall stiffness and stability of the vehicle, reduces multiple movable mechanisms, reduces the complexity of folding and unfolding operations, simplifies the mechanism accessories, simplifies the manufacturing and assembly process, and also It reduces the cost and is especially suitable for folding bicycles with small wheel diameters.

The above are only preferred embodiments of the present invention and do not limit the invention in any form. Any simple modifications, equivalent changes or modifications made to the above embodiments based on the technical principles of the present invention still belong to the present invention. within the scope of the technical solution of the invention.

Claims (13)

1. A bicycle that can be folded to form a two-wheeled parallel cart, including a front part, a rear part and a folding beam part, and the folding beam part is used to connect the front part and the rear part front and rear, and is characterized by: : The folding car beam part includes a folding car beam and a reinforced car beam. The folding car beam is located on the upper part of the reinforced car beam. The folding car beam includes a first car beam and a second car beam. The first car beam The beam and the second car beam are hingedly matched and folded and rotated in the horizontal direction. The front end of the first car beam is installed in conjunction with the front car part. The second car beam is hingedly matched with the rear car part. The second car beam is hingedly matched with the rear car part. The beam and the rear car part fold and rotate in a horizontal direction. One end of the reinforced car beam is hinged and the other end is detachably mounted. 2. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 1, characterized in that: after the detachable end of the reinforced vehicle beam is disassembled, the first vehicle beam drives the front vehicle part to face the opposite direction. The second vehicle beam is folded in the horizontal direction to form a 90° fit, and the second vehicle beam is folded in the horizontal direction relative to the rear vehicle part to form a 90° fit, so that the front wheel in the front vehicle part and the front wheel in the rear vehicle part The rear wheels are parallel. 3. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 2, characterized in that: the first vehicle beam and the second vehicle beam are hinged structures, the second vehicle beam and the said second vehicle beam are The hinge structure of the rear car part adopts a hinge structure that can be limited and locked. 4. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 1, characterized in that: the front bicycle part includes a handlebar part, a vehicle tube part and a front wheel, and the vehicle tube part is provided with a A first mounting seat and a second mounting seat. The first mounting seat is used to cooperate with the first vehicle beam. The second mounting seat is used to cooperate with the reinforced vehicle beam. The handlebar part includes handlebars and connections at both ends. The handlebar tubes of the handlebars at both ends have a folded structure relative to the handlebar tube. The lower part of the handlebar tube is fixedly matched with the vehicle tube part. The lower part of the vehicle tube part is matched with the wheel through the front fork. 5. A bicycle foldable to form a two-wheeled parallel cart according to claim 1, characterized in that: the front bicycle part includes a handlebar part, a vehicle tube part and a front wheel, and the vehicle tube part is provided with a The fifth mounting seat is used to fixedly cooperate with the first vehicle beam. The lower part of the first vehicle beam also cooperates with the fifth mounting seat through a reinforcing beam tube. The first vehicle beam is connected with the reinforced beam. One end of the vehicle beam is removable and fixedly matched, and the other end of the reinforced vehicle beam is hingedly matched with the rear vehicle part. 6. A bicycle foldable to form a two-wheeled parallel cart according to claim 5, characterized in that the reinforced vehicle beams include reinforced cross beams and reinforced diagonal beams, and a triangular structure is formed between the reinforced cross beams, reinforced diagonal beams and longitudinal beams. , the reinforced cross beams and reinforced oblique beams and the longitudinal beams all adopt hinged structures. 7. A bicycle that can be folded to form a two-wheeled parallel cart according to any one of claims 1 to 3, characterized in that: the reinforced vehicle beam includes a reinforced fixed beam and a reinforced movable beam, and the reinforced fixed beam is located at the first The lower part of a vehicle beam, the other end of the reinforced fixed beam is used to hingely cooperate with the reinforced movable beam, the other end of the reinforced movable beam is used to dock with the second crossbeam, and is detachably fixed with the first crossbeam or/and the second crossbeam Install. 8. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 7, characterized in that: the rear part includes a frame, and the frame includes a rear main beam and a docking beam assembly, and the docking beam assembly In order to cooperate with the folding vehicle beam and the reinforced vehicle beam, the docking beam assembly includes a first crossbeam, a second crossbeam and a longitudinal beam. The first crossbeam continues to extend toward the front vehicle part relative to the longitudinal beam. The first crossbeam is The cross beam and the reinforced movable beam are superimposed in parallel up and down along the vertical direction. 9. A bicycle that can be folded to form a two-wheeled parallel cart according to any one of claims 1 to 6, characterized in that: the rear portion includes a seat, a frame and a rear wheel, and the seat is located on the The upper part of the vehicle frame, the vehicle frame includes a rear main beam, a butt beam assembly and a rear fork. The butt beam assembly and the rear fork are both fixedly installed with the rear main beam. The butt beam assembly is used to connect with the folding vehicle beam. The rear fork is used to cooperate with the rear wheel. 10. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 9, characterized in that: the butt beam assembly includes a first cross beam, a second cross beam and a longitudinal beam, and the first cross beam and the longitudinal beam are connected at the joint A third mounting seat is provided, and the third mounting seat is used to cooperate with the second vehicle beam. A fourth mounting seat is provided at the joint between the second cross beam and the longitudinal beam. The fourth mounting seat is used to strengthen the Car beams are installed together. 11. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 10, characterized in that: the first vehicle beam, the second vehicle beam and the first cross beam are folded with each other to form an "O"-shaped structure. 12. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 11, characterized in that: the second mounting seat and the reinforced vehicle beam adopt a detachable installation fit, and the fourth mounting seat and the reinforced vehicle beam adopt a The hinge structure of the fourth mounting base and the reinforced vehicle beam adopts a hinge structure that can be limited and locked. 13. A bicycle that can be folded to form a two-wheeled parallel cart according to claim 11, characterized in that: the second mounting seat and the reinforced vehicle beam are hingedly matched, and the hinged structure of the second mounting seat and the reinforced vehicle beam is A hinge structure that can be limited and locked is used, and the fourth mounting base and the reinforced vehicle beam are detachably installed and matched.