KR20110123403A - Passenger car four-wheeled bicycle - Google Patents

Abstract

PURPOSE: A car-type four wheel bicycle is provided to miniaturize and lighten the bicycle by reducing the chassis of the bicycle. CONSTITUTION: A car-type four wheel bicycle comprises a main center tube(1), front wheel support tubes(2), post housings(7,7a), a center handle post housing, a handle post(15), a crank hub housing(9), a seat stay tube(6), and a rear wheel chain stay hub. The main center tube and the front wheel support tubes are connected to each other through bridges(3,3a). The post housings are installed in the end of the front wheel support tubes. The center handle post housing is formed in the front end of the main center tube. A handle bar is assembled in the top of the handle post. A down tube is formed from the top to bottom of the main center tube. The crank hub housing is installed in the end of the down tube. The seat stay tube is horizontally installed in the bottom end of the main center tube.

Description

Passenger car four-wheeled bicycle {omitted}

The present invention relates to a one-seat four-wheeled bicycle propelled by a pedal. The structure of the frame is simple, and the crank hub housing is formed in a free space that is not indirectly subjected to steering operation of the front wheels and the center part between the left and right front wheels. In the low phase of the center of the four wheels, the passengers can pedal in a comfortable and stable posture, and in the front wheel steering system, the existing suspension suspension forkpost with the steering arm formed on the neck of the fork is left and right Insert the steering wheel into the post housing formed in the center and insert the steering wheel with the steering wheel at the lower part of the center handle post housing to perform the steering function of the front wheels with a simple structure connecting the left and right steering arms and steering wheels with link balls and rods. The two-wheel suspension function is equipped with ballistic springs inserted to the left and right of the center cross tube. One end of the pring is inserted into a spring fixture formed in the cross tube, and the other end is formed by inserting and inserting a spring insertion fixture near the rear wheel chainstay hub to perform suspension by spring springs without a separate spring support. It is a four-wheeled bicycle that uses the stepping power of the occupants as a power source to shorten the body length with a short interaxle distance to realize lighter weight and smaller body size, and it is possible to operate safely and efficiently in the same posture as a passenger car. This waterproof and windproof cover is installed to provide a transport mechanism that can run all weather regardless of rainy weather.

In addition, it is possible to operate more easily by constructing a hybrid by adding a small engine or an electric battery as an auxiliary power source.

In general, the conventional three-wheeled, four-wheeled bicycle that uses the stepping force of the occupant to drive the rear wheel to perform a means of transportation or cargo transportation is used as one of the green transportation.

In particular, as one of the short-distance means of transportation, leisure, and sports equipment, the demand is gradually increasing due to environmentally friendly characteristics.

However, the conventional multi-wheeled bicycles do not meet the demands of the consumer due to their structural complexity and dullness in use. Most of the structure is a simple connection of the frame of the two-wheeled bicycle or too complicated structure is difficult to operate the situation is receiving the exterior of the user's real life bicycle.

The body structure of a three- or four-wheeled bicycle is a triangular support frame or a frame of two two-wheeled bicycles, which are simply connected to each other, and their practicality is limited.

First, the frame structure of the multi-wheeled bicycle is the same as the structure of the two-wheeled bicycle, and the seat (saddle) is formed at a high position, and the crank hub is formed at the vertical lower portion thereof, so that the center of gravity is located at the upper side. There is a more unstable risk of overturning.

Secondly, in the case of three- or four-wheeled bicycles, in order to avoid interference of pedaling due to the steering operation of the front wheels, the wheels of the front wheels were formed with a great distance or the wheels of the front wheels were equipped with very small wheels. This made the body more dull and difficult for the occupants to control.

Third, in the case of a multi-wheeled bicycle, it was difficult to structurally install an independent suspension system for each wheel. As a result, the impact on the uneven part of the road during driving was transmitted to the occupant without filtering and caused a sudden change in the center of gravity of the occupant.

Fourth, even in the steering device of the front wheel, the steering wheel of one side and the steering wheel of the other side were simply connected, and the steering wheel of one side was not suitable for steering of the four-wheeled bicycle.

A "V" shaped front wheel support frame capable of supporting two front wheels is formed at the front end of the main center tube in a multi-layer structure, and a crank hub housing is formed between the two front wheels to allow free pedaling without interference from the steering operation of the front wheels. The seat stay tube is horizontally formed under the main center tube, so the seat back with the backrest and the armrest, rather than the bicycle saddle, are installed in the low phase of the center of the four wheels, allowing the passenger to press the pedal effectively in a comfortable and stable position. In the lowermost part of the main center tube, a cross tube is formed horizontally so that suspension, power transmission, and rear support chain stays can be installed. In the front steering system, a steering arm is formed on the neck of the front fork. The Spencer fork post is inserted into the post housing formed on the front wheel shaft and rotated. The center handle post housing, which is formed at the top end of the main center tube, is inserted into the handle post with a steering rudder at the bottom, and the steering wheel of the front and rear wheels is connected by a link ball and a rod. The rear two-wheel suspension function is equipped with inserting each ball spring on the left and right sides of the cross tube to enable the suspension function without any spring support.

The single-seat four-wheeled bicycle according to the present invention is a four-wheeled exercise machine that uses the stepping power of the occupant as the main driving force to shorten the length of the chassis with a short wheelbase to realize miniaturization and light weight, and efficient pedaling itself and a low center of gravity. In addition, it is possible to operate safely and comfortably like driving a car with a full suspension function of 4 wheels before and after. In addition, if the hybrid is constructed by the additional installation of auxiliary power, it is possible to operate a long distance and contribute to popularization as a living bicycle.

1 is a schematic perspective view according to the present invention
2 is a core structure diagram of a vehicle body according to the present invention;
Figure 3 is a front side view according to the present invention
4 is a schematic diagram of a steering apparatus according to the present invention;
5 is a block diagram of a rear wheel suspension and a power transmission device according to the present invention;
6 is a front view according to the present invention;
7 is a plan view according to the present invention

Hereinafter, a single-seat four-wheeled bicycle according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view of a one-seater four-wheeled bicycle according to an embodiment of the present invention

FIG. 2 is a view showing the core structure from which the parts are removed. As shown in the drawing, the "V" shaped front wheel support tubes 2 and 2a are widened to the left and right sides of the main center tube 1 of the multilayer structure having a high inclined tip and a lower bottom. And reinforcing the bridge between the main center tube (1) and the "V" shaped front wheel support tubes (2, 2a) with bridges (3, 3a) and at the ends of the left and right "V" shaped front wheel support tubes (2, 2a), respectively. The handle post 15 which forms a post housing 7 and 7a so that the front wheel post can be pivoted and a steering wheel 14 is formed at the lower end of the main center tube 1 and a handle bar can be assembled at the top. To form a center handle post housing (8) into which it can be inserted, and also to form a down tube (4) downward from the top of the main center tube (1), and assembling the crankset at the end of the down tube (4). Formable crank hub housing (9) to prevent interference with steering wheel steering The seat stay tube (6), which can be connected to the crank hub housing (9) and the cross tube (5) by chainstays (31, 31a) and can be seated at the lower portion of the main center tube (1). To form horizontally, horizontally forming the cross tube (5) horizontally at the bottom end of the main center tube (1) and the left and right end portions of the cross tube 5 is inserted into the ball spring (17, 17a) inwardly The parts 28 and 28a and the outside are formed with parts 29 and 29a for inserting and mounting the rear wheel chain stay hubs 20 and 20a.

In addition, the cross tube 5 is formed with spring supports 18 and 18a formed with insertion slots 19 and 19a capable of inserting one end of the tandem springs 17 and 17a. The other end inserts and inserts insertion slots 21 and 21a in the rear of the chain stay hub 20 supporting the rear wheels, so that the left and right ball springs 17 and 17a are independent of each other without the need for a separate spring support tube. Suspend function can be performed.

In addition, it is possible to provide an independent suspension function with sufficient four-wheel suspension using a fork equipped with a conventional speed up bar in front wheel suspension. At the rear of the cross tube 5, axle supports 22 and 22a with bearings are formed, and axle shafts are provided with a center axle wheel gear 27 connected to the crank chain gear and the chain. Small sprocket gears 23 and 23a are mounted on the yaling end of the shaft 26 and connected to the freewheel gears 24 and 24a mounted on the rear wheel hub.

For reference, in the single-seat four-wheeled bicycle configured as described above, a brake device, a transmission device, a lever, and each cable, etc., which are not shown in the related art, will not be described in detail.

Looking at the operation of each configuration of the present invention configured as described above are as follows.

As shown in FIG. 4, the steering mechanism of the front wheel has a fork post having a steering arm 10 of a predetermined length formed at the neck portion of the front fork, and a post housing 7 formed at both ends of the left and right front wheel support tubes 2 and 2a. Insert the steering arm (10, 10a) formed in the neck of the left and right front fork with the link balls (11, 11a) and the steering rod, and the left and right of the steering rod (15) It is connected to the left and right link balls 13 and 13a installed on the steering wheel 14 formed on the lower part to rotate the front wheel with a simple structure. By the action of the link ball yawing up and down, the steering arm assembled on the neck of the front hook alleviates the phase difference that occurs during steering, so that smooth steering is achieved.

In this way, the steering device of the front wheel is operated at a high position, not at the bottom or middle part of the wheel, so that the crank hub housing is formed in a free space in the center between the left and right front wheels without being interfered with the steering operation of the front wheel. It is possible to realize the weight reduction by shortening the chassis length by reducing the distance between the shafts.

In addition, the seat stay tube 6 is formed horizontally at the lower end of the main center tube so that the seating position of the seat 25 can be installed at a lower phase at the center of the left and right rear wheels, thereby lowering the center of gravity of the occupant and the vehicle body. And stable pedaling.

In addition, the seat stay tube (6) forms a seat fixing bracket (30) capable of adjusting the distance between the pedal and the seat, and the seat is installed, the backrest portion and the left and right armrests (armrests) are not conventional bicycle saddles (seats) The seat 25 provided to hold the center of gravity of the occupant while driving to enable safe driving.

In addition, by installing a waterproof windproof cover that can be detached and folded, it provides a transport mechanism that can run all weather regardless of cold or rainy weather. It is also a high-power by adding a small engine or electric battery as an auxiliary power source. And efficient operation is possible.

1: main center tube 2: front wheel support tube
3: bridge 4: down tube
5: cross tube 6: seat stay tube
7: Post housing 8: Center handle post housing
9: crank hub housing 10: steering arm
11: Link Ball 12: Steering Rod
13: Link Ball 14: Steering
15: handlepost 16: front fork
17: Tandong spring 18: Tandong spring support
19: spring insertion hole 20: chain stay hub
21: spring insertion zone 22: axle support
23: sprocket gear 24: free wheel
25: seat 26: axle
27: centrifugal 28: spring mounting portion
29: chainstay hub mounting 30: seat bracket
31: Crank Hub Chain Stay

Claims (3)

In the frame structure of a single-seater four-wheeled bicycle that is pedaled, a "V" shaped front wheel support tube (2, 2a) which is widened from side to side on the front end of the main center tube (1) having a high inclined portion and a low lower portion inclined. ) And reinforcing the bridge between the main center tube (1) and the "V" shaped front wheel support tubes (2, 2a) with bridges (3, 3a), and at the ends of the left and right front wheel support tubes (2, 2a), respectively. A post housing (7, 7a) for inserting and rotating the post is formed, and a center handlepost housing (8) is formed at the top of the main center tube (1) so that the handle bar is assembled at the top and the steering wheel (14) at the bottom. Inserting the handle post (15) formed therein and also forms the down tube (4) downward from the top of the main center tube and the crank hub housing (9) to which the crank set can be mounted at the end of the down tube (4). Between the crank hub housing (9) and the cross tube (5) It is connected to the chainstays 31 and 31a and horizontally forms a seatstay tube 6 for seat mounting at the lower end of the main center tube 1, and crosses the tube at the bottom of the main center tube 1 laterally. ) Horizontally and the left and right end portions of the cross tube (5) inserting and inserting the elastic spring (17, 17a) on the inside and the rear chain chain stay hub (20, 20a) on the outside (29) Passenger car type four-wheeled bicycle, characterized in that it has a core frame structure to form, 29a). In the steering system of a single-seater four-wheeled bicycle that is pedaled, a fork post having a predetermined length of steering arms (10, 10a) formed at the neck of the front fork is provided at both ends of the left and right front wheel support tubes (2, 2a). Inserting the formed post housing (7, 7a) and connecting the steering arm (10, 10a) formed on the neck portion of the fork to one side of the link ball (11, 11a) and the other side of the steering rod (12, 12a) of a certain length Another side of the steering rod is connected to the left and right link balls (13, 13a) installed on one side of the steering wheel 14 formed in the center of the steering wheel post (15) is installed on the center of the steering wheel poster Passenger car type four-wheeled bicycle, characterized in that the steering wheel has a structure in which the steering function of the front wheel is performed. In the rear suspension of a single-seat four-wheeled bicycle, which is driven by a pedal, the ballistic springs are inserted into the ballistic spring mounting portions 28 and 28a of the cross tube 5 by the action of loosening and tightening the ballistic springs. 17a) One end is inserted into the insertion slots 19 and 19a of the spring supports 18 and 18a formed in the cross tube 5, and the other end is formed in the close rear of the chain stay hub 20 supporting the rear wheels. It is operated by inserting into the insertion slots 21 and 21a and using the front fork in which the existing shock absorber is built into the front suspension system, so that the front and rear four wheels have a unique suspension structure. Suspension's four-wheeled bicycle.

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