CN207389395U - Formula of lying bicycle - Google Patents

Abstract

The utility model discloses a reclining two-wheeled bicycle. The action system is set as a wheel set composed of front wheels and rear wheels; The backrest of the seat is connected with the base through the rotating shaft, the back of the backrest is connected with the central axis of the rear wheel through the support frame, and an umbrella pole structure is arranged between the headrest and the backrest; the brake handle of the braking system It is connected to the front and rear brakes through the brake line; the transmission system includes pedals, cranks, center shafts, sprockets, chains and flywheels. The pedal force of turning the pedals is transmitted to the flywheels and rear wheels through the cranks and sprockets to drive the bicycle forward. . The seat can be adjusted freely to suit groups of different heights. It meets the requirements of the human body, can meet the weight of the human body, and ensures the comfort of people when riding, and the speed is fast; it is fashionable and novel, with good comfort, good braking effect, safety, and it is not easy to fall and get injured.

Description

recumbent two-wheeled bicycle

technical field

The utility model belongs to the technical field of bicycle equipment, in particular to a lying two-wheeled bicycle.

Background technique

The adjustment range of the existing reclining car seat is small, and the prior art cannot flexibly adjust the seat, and cannot adapt to the needs of different groups of people.

The structure of an ordinary bicycle includes handlebars, frame, front and rear wheels [including front and rear axle components, spokes, rims, tires], front forks, saddles, sprockets, chains, center shafts, flywheels, cranks, pedals, brakes Brakes), lights, bells, reflectors, etc. As a new type of bicycle, the recumbent bicycle has many differences compared with traditional bicycles, but the standards (national standards, industry standards) of ordinary bicycles still have great reference value, so in this application, some standards of ordinary bicycles are used as the recumbent bicycle. design standards. The standards used in the patent are: QB/T1775-1993 bicycle handlebar, QB1880-2008 bicycle frame, QB1881-2008 bicycle front fork, QB/T1883-1993 bicycle ordinary front axle and rear axle, GB/T7377-2008 bicycle Tire series, QB/T1885-1993 bicycle sprocket and crank, etc.

As a new type of bicycle, the recumbent bicycle has many advantages that traditional bicycles do not have, but at the same time, due to its short development time, there are still imperfections to be improved. The recumbent bicycle has the following disadvantages: the body is too low, and it is easy to eat the exhaust gas of the car when it is close to the car. It is easy to cause misunderstanding, because it is a semi-recumbent design, people who do not understand it will think it is a special vehicle for the disabled. Flexibility and balance are slightly worse than traditional bicycles.

In the design process, the key dimensions of bicycles refer to the main dimensions that affect the performance of the mechanism. A design often cannot meet the requirements of all people. It can only be designed according to the body size of some people, and then allow certain variables to meet the needs of others. . Human body dimensions to be referenced in this design. In the end, it was decided to use the data with a percentage of 95% as the basis for the human body size in the design process, and then allow certain size changes to meet the requirements of different groups of people.

Due to structural defects, traditional bicycles have large wind resistance, poor comfort, high center of gravity, and poor vision for riders when riding, so structural improvements are needed. Recumbent bicycles are divided into two types: front-drive and rear-drive. The rear-drive recumbent two-wheeled bicycle has good maneuverability, flexible steering, and can adapt to various complicated roads, but the chain is long, the transmission system is complicated, and the effective power loss is large. This design transforms on the basis of the existing rear-drive bicycle, and devotes itself to developing a rear-drive recumbent two-wheeled bicycle.

Due to the lack of experience in the initial design, many structural and dimensional problems occurred during the design process, specifically in:

1. Determine the structure of the frame. The frame is the soul of the bicycle. In the design, it is necessary to consider whether the structure of the frame is reasonable, and whether the size of the frame meets the requirements. In the case of incomplete relevant information, resulting in confusion, unable to come up with a very reasonable plan.

2. Select the size of each component according to the standard. Due to the variety of size parameters, it is very difficult to choose the size that meets the requirements, especially on the premise that various sizes can meet the requirements, the choice is even more difficult.

3. The structural design of the seat, how to meet the expected requirements, make the structure compact, reasonable and comfortable, and at the same time meet the requirements of human body size, also needs to be considered repeatedly.

4. The connection between the seat and the frame, how to realize the stepless adjustment and fixation of the seat on the frame, including the adjustment and fixation of the backrest angle are all difficulties in the design process.

5. In order to adapt to different groups of people, the distance from the pedal to the seat can be adjusted, which will cause the position of the sprocket to change, thereby changing the tightness of the chain. When it is too loose, the chain will easily slip off. How to ensure the tightness of the chain Moderation is another big issue in design.

6. Modeling of parts. Many parts have complex and changeable structures. It is very difficult to design their structures well with software and model them with software.

Difficulties encountered in the design process of the whole bicycle are various, how to overcome the above problems, a new type of lying two-wheeled bicycle developed by the research and development department has important practical significance.

Utility model content

Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a recumbent two-wheeled bicycle.

Ergonomics is the study of the interaction between man, machine and their working environment. In the structural design of a recumbent bicycle, the cooperation between the rider and the bicycle must be considered, and the design of the recumbent bicycle is required to conform to the human body structure, and it is safe and comfortable to ride, so ergonomics should be considered.

The technical scheme that the utility model takes is:

A recumbent two-wheeled bicycle includes a body, a moving system, a braking system and a transmission system, the moving system is set as a wheel set consisting of a front wheel and a rear wheel, and the diameter of the front wheel is smaller than that of the rear wheel;

The vehicle body includes a vehicle frame, a handlebar and a seat, and the vehicle frame is configured as a structure in which a horizontal bracket and a vertical bracket are connected at an angle of 71°. The bottom end of the vertical bracket and the rear end of the horizontal bracket pass through the front fork, The rear fork is connected with the front wheel and the rear wheel, and the top of the longitudinal support is provided with a handlebar;

The seat includes a headrest, a backrest, and a base. The backrest and the base are movably connected through a rotating shaft. The back of the backrest is connected with the central axis of the rear wheel through a support frame. The backrest rotates around the rotating shaft to adjust the angle of the backrest. An umbrella pole is arranged between the headrest and the backrest. Structure, the distance between the headrest and the backrest is adjusted through the umbrella pole; the base is fixed on the horizontal bracket through the connecting frame;

The braking system consists of brake levers, front and rear brakes, and brake lines. The brake levers are connected to the front and rear brakes through brake lines; the transmission system includes pedals, cranks, central shafts, sprockets, chains and flywheels. The central shaft is along the horizontal bracket. The front end of the front wheel is extended to the front end of the front wheel, a flywheel is provided on the central shaft, left and right cranks are respectively provided on both sides of the central shaft, pedals are provided on the left and right cranks, a sprocket is provided on the central shaft of the rear wheel, and the chain is sleeved. On the flywheel and the sprocket, the pedal force of turning the pedals is transmitted to the flywheel and the rear wheel through the crank and the sprocket to drive the bicycle forward.

Further, the handlebar is a structure formed by connecting the standpipe and the horizontal pipe, and the handlebar forms symmetrical door-shaped handlebar arms along both sides of the vehicle body.

Further, the bottom of the base is provided with a rectangular parallelepiped protrusion, and the upper end of the connecting frame is provided with a "concave"-shaped slot that engages with the rectangular parallelepiped protrusion, and the rectangular parallelepiped protrusion engages in the "concave"-shaped clamping groove.

Further, the lower end of the connecting frame is provided with a locking cavity, and the cross section of the locking cavity is set as a hollow cavity formed by connecting an elliptical cavity and a square cavity; the width of the square cavity is smaller than that of the elliptical cavity The connecting frame is fixedly installed on the cross bracket of the vehicle frame through the snap-in cavity.

Further, the backrest and the headrest of the seat are sequentially provided with airbags and shock-absorbing pads from the inside to the outside, and the inner walls of the shock-absorbing pads and the airbags are interlaced with hemispherical grooves and hemispherical protrusions.

Furthermore, the shock-absorbing pad is configured as a structure in which the shock-absorbing units are arranged at equal intervals, and the shock-absorbing units are configured as cylindrical sponge pads with springs sleeved on the outside.

Further, the frame is a detachable structure made of chrome-molybdenum steel; the handlebar is made of aluminum alloy; the end of the handlebar is provided with a handlebar cover made of rubber material.

Further, the chain is a structure in which inner chain plates, outer chain plates, rollers, sleeves and pins are interconnected, and a tapered wear-resistant block is provided on the contact surface of the pins and the sleeves.

The beneficial effects of the utility model are:

In the utility model, the seat can be adjusted freely, and the angle of the backrest can be adjusted, and the utility model can adapt to groups of different heights. Can meet the needs of different groups of people. The structure of the car body is closely connected with the front and rear wheels, which meets the requirements of the human body, can meet the weight of the human body, and ensures the comfort of people when riding. Various requirements such as strength requirements, maximum allowable load requirements, and cost requirements.

Advantages of recumbent bikes:

The speed is fast. Since you ride on your back, the shoulders and back are used as a support point, which is convenient for the feet to exert force.

Stylish and novel, the difference from ordinary bicycle structure makes it give people a refreshing feeling.

The comfort is good. Compared with the narrow saddle, the semi-recumbent seat design makes people more comfortable and relaxed.

The braking effect is better, the comfortable riding posture and the rearward center of gravity make the braking effect better than that of an upright bicycle.

Safety, the center of gravity of the body is low, and it is not easy to fall and get injured.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a structural schematic diagram of the seat in the utility model.

Fig. 3 is a schematic cross-sectional structure diagram of the connecting frame in the present invention.

Among them, 1. Front wheel; 2. Pedal; 3. Crank; 4. Flywheel; 5. Horizontal support; 6. Vertical support; 7. Handlebar; 8. Handle; 9. Base; 10. Backrest; 11. Head Pillow; 12, support frame; 13, rear wheel; 14, rear fork; 15, connecting frame; 16, front fork;

Detailed ways

Further illustrate the utility model below in conjunction with accompanying drawing.

Example 1

As shown in Figure 1 and Figure 2, a recumbent two-wheeled bicycle includes a car body, a motion system, a braking system and a transmission system. The self-weight of a recumbent bicycle is about 17kg, and the maximum load is about 120kg. ° around, the leg length range is 850mm-1150mm, and the human body height is between 1500mm-1900mm.

The action system is set as a wheel set composed of front wheels and rear wheels, and the diameter of the front wheels is smaller than that of the rear wheels;

On the one hand, the wheel bears the full weight of the bicycle itself and the rider, and on the other hand, the rotation of the wheel pushes the bicycle forward and turns, so the wheel must have sufficient strength. In addition, the wheel structure should have appropriate elasticity to enhance the shock absorption and improve the comfort of the rider.

The vehicle body includes a vehicle frame, a handlebar and a seat, and the vehicle frame is configured as a structure in which a horizontal bracket and a vertical bracket are connected at an angle of 71°. The bottom end of the vertical bracket and the rear end of the horizontal bracket pass through the front fork, The rear fork is connected with the front wheel and the rear wheel, and the situation of avoiding stress is of the nature of the cantilever beam. The front wheel and the rear wheel are connected through the front fork and the rear fork to provide sufficient strength.

The frame is the main part of the bicycle, which bears the full weight of the rider. The front and rear parts of the frame must have certain rigidity and elasticity to ensure that the bicycle can run smoothly on different roads.

In the structure of the bicycle, the angle of the seat tube determines the position of the riding center of gravity and the output effect. The larger the angle, the more the seat tube leans forward, and the faster the riding speed. The selected angle is 71°, which is suitable for the design of a recumbent bicycle, so that the speed of the bicycle is moderate and the riding safety is ensured.

The frame is a detachable structure made of chrome-molybdenum steel; on the basis of meeting the strength requirements, the existing one-piece frame cannot meet the problem of seat adjustment, so the frame structure is set as a detachable structure. It can solve the mobility problem of the seat position and the connection of the seat and the frame.

The handlebars of a bicycle control the direction of travel of the bicycle, and the flexibility of its manipulation is related to the length and height of the handlebars. The top of the longitudinal bracket is provided with a handlebar; the handlebar is made of aluminum alloy; the end of the handlebar is provided with a handlebar cover made of rubber material to improve the comfort of use. The frame is made of chrome-molybdenum steel, which is a traditional type of strong and durable steel, characterized by thin tube walls, light weight and high strength. Extended service life.

The seat includes a headrest, a backrest, and a base. The backrest and the base are movably connected through a rotating shaft. The back of the backrest is connected with the central axis of the rear wheel through a support frame. The backrest rotates around the rotating shaft to adjust the angle of the backrest. An umbrella pole is arranged between the headrest and the backrest. Structure, the distance between the headrest and the backrest is adjusted through the umbrella pole; the base is fixed on the horizontal bracket through the connecting frame;

The reclining bicycle seat is quite different from the ordinary bicycle seat, and its structure is similar to that of a car seat. It is designed according to human body size, so when riding, the rider can freely choose the angle of the backrest. The distance between the headrest and the backrest is adjusted through the umbrella rod, which improves the comfort of the bicycle. The seat material is aluminum alloy. long lasting.

The brake system consists of brake levers, front and rear brakes, and brake cables. The brake levers are connected to the front and rear brakes through the brake cables; the front and rear brakes are controlled by manipulating the brake levers by hand, so as to realize the braking of the bicycle and ensure that the brakes are effectively achieved. Performance requirements to improve the safety of recumbent bikes.

The transmission system includes pedals, a crank, a central shaft, a sprocket, a chain and a flywheel. The central shaft extends along the front end of the cross bracket to the front end of the front wheel. The crank is a device that converts horizontal force into rotational force. There are pedals on the left and right cranks, and a sprocket on the central axis of the rear wheel. The chain is set on the flywheel and the sprocket. It is transmitted to the flywheel and rear wheel through the crank and sprocket to drive the bicycle forward.

The chain is installed on the sprocket and the flywheel. The flywheel and the sprocket keep the same plane, are installed on the rear axle, and are connected with the sprocket through the chain to form the driving system of the bicycle. Flywheels can be divided into two types: single-stage flywheels and multi-stage flywheels. In this design, due to the simple structure, a single-stage flywheel and a single-stage sprocket are selected. A single-stage flywheel is also called a single-sprocket flywheel. It is mainly composed of a jacket, a flat block and a core, a jack, a jack spring, a washer, a wire block, and a few steel balls. Its working principle: step the pedal forward, and the chain drives the flywheel to rotate forward. At this time, the inner teeth of the flywheel and the jack are contained, and the rotational force of the flywheel is transmitted to the core through the jack, and the core drives the rear axle and the rear wheel to rotate. just go ahead. Stop stepping on the pedals, the chain and the overcoat do not rotate, but the rear wheel still drives the core and the jack to rotate forward under the action of inertia. When the pedals are reversed, the jacket rotates in the opposite direction, which will accelerate the sliding of the jack and make the "click" sound more urgent. Its function is to transfer the pedal force from the crank and the sprocket to the flywheel and the rear wheel to drive the bicycle forward.

The chain is a structure in which inner chain plates, outer chain plates, rollers, sleeves and pins are connected to each other, and a tapered wear-resistant block is arranged on the contact surface of the pin shaft and the sleeve. The inner and outer chain plates of the bicycle chain are made into an 8 shape, so that each section of it has a close tensile strength, and at the same time reduces the mass of the chain and the inertial force of movement.

Example 2

On the basis of Embodiment 1, different from Embodiment 1, the handlebar is a structure that connects the standpipe and the cross pipe, and the handlebar forms symmetrical door-shaped handlebar arms along both sides of the car body. The handle of the handlebar is set at an angle close to 90° downwards, which ensures the comfort of the handle when lying on the seat and improves the accuracy of the control.

As shown in Figure 3, the bottom of the base is provided with a rectangular parallelepiped projection, and the upper end of the connecting frame is provided with a "concave"-shaped slot that engages with the rectangular parallelepiped projection, and the rectangular parallelepiped projection engages in the "concave"-shaped clamping groove. The lower end of the connecting frame is provided with a locking cavity, and the cross section of the locking cavity is set as a hollow cavity formed by connecting the oval cavity and the square cavity; the width of the square cavity is smaller than the width of the oval cavity, and the connecting frame passes through The engaging cavity is fixedly installed on the cross bracket of the vehicle frame.

The structure of the connecting frame is novel, it is fixed with the base through the card slot at the upper end, the card slot of the connecting frame and the bottom protrusion of the base fit together to avoid displacement; The bracket is fixed, and the square cavity plays a transitional role. The inner wall of the elliptical cavity and the horizontal bracket of the frame are attached to each other. At the same time, the side plates corresponding to the square cavity are fastened by bolts to prevent the base from going left and right along the horizontal bracket of the frame. Moving, the connecting frame fixes the base and the frame well, ensuring the position stability of the seat during riding and ensuring riding safety.

The backrest and headrest of the seat are provided with airbags and shock-absorbing pads sequentially from the inside to the outside, and the inner walls where the shock-absorbing pads and airbags contact each other are interlaced with hemispherical grooves and hemispherical protrusions, and the shock-absorbing pads are set as shock-absorbing units The structure is arranged at equal intervals, and the shock-absorbing unit is set as a cylindrical sponge pad with springs on the outside. The setting of the shock-absorbing pad improves the effect of shock-absorbing and buffering. When it is subjected to a certain pressure bump, the shock-absorbing unit composed of the spring and the sponge pad acts as the first layer of shock-absorbing protection, and at the same time transmits the force to the airbag, using the airbag itself The excellent elasticity can fully alleviate the bumps during riding, and provide the rider with a conveying seat environment, which is conducive to extending the riding time and reducing riding fatigue.

The above description is not a limitation of the present utility model. It should be pointed out that for those of ordinary skill in the art, some changes, modifications, additions or replacements can also be made without departing from the essential scope of the present utility model. , These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims (8)

1. Recumbent two-wheel bicycle is characterized in that, comprises car body, action system, brake system and transmission system, and described action system is set to the wheel set that front wheel, rear wheel form, and the diameter of front wheel is less than that of rear wheel diameter; The vehicle body includes a vehicle frame, a handlebar and a seat, and the vehicle frame is configured as a structure in which a horizontal bracket and a vertical bracket are connected at an angle of 71°. The bottom end of the vertical bracket and the rear end of the horizontal bracket pass through the front fork, The rear fork is connected with the front wheel and the rear wheel, and the top of the longitudinal support is provided with a handlebar; The seat includes a headrest, a backrest, and a base. The backrest and the base are movably connected through a rotating shaft. The back of the backrest is connected with the central axis of the rear wheel through a support frame. The backrest rotates around the rotating shaft to adjust the angle of the backrest. An umbrella pole is arranged between the headrest and the backrest. Structure, the distance between the headrest and the backrest is adjusted through the umbrella pole; the base is fixed on the horizontal bracket through the connecting frame; The braking system consists of brake levers, front and rear brakes, and brake lines. The brake levers are connected to the front and rear brakes through brake lines; the transmission system includes pedals, cranks, central shafts, sprockets, chains and flywheels. The central shaft is along the horizontal bracket. The front end of the front wheel is extended to the front end of the front wheel, a flywheel is provided on the central shaft, left and right cranks are respectively provided on both sides of the central shaft, pedals are provided on the left and right cranks, a sprocket is provided on the central shaft of the rear wheel, and the chain is sleeved. On the flywheel and the sprocket, the pedal force of turning the pedals is transmitted to the flywheel and the rear wheel through the crank and the sprocket to drive the bicycle forward. 2. The recumbent two-wheeled bicycle according to claim 1, characterized in that, the handlebar is a structure that connects the standpipe and the horizontal pipe, and the handlebar forms a symmetrical gate shape along both sides of the vehicle body handlebar arm. 3. The recumbent two-wheeled bicycle according to claim 1, characterized in that, the bottom of the base is provided with a cuboid bump, and the upper end of the connecting frame is provided with a "concave"-shaped slot that engages with the cuboid bump, The rectangular parallelepiped bump is engaged in the "concave" shaped slot. 4. The recumbent two-wheeled bicycle according to claim 3, characterized in that, the lower end of the connecting frame is provided with an engaging cavity, and the cross section of the engaging cavity is set to be connected by an elliptical cavity and a square cavity. Hollow cavity; the width of the square cavity is smaller than the width of the oval cavity, and the connecting frame is fixedly installed on the horizontal bracket of the vehicle frame through the locking cavity. 5. The recumbent two-wheeled bicycle according to claim 1, characterized in that, the backrest and the headrest of the seat are sequentially provided with airbags and shock-absorbing pads from the inside to the outside, and the inner walls of the shock-absorbing pads and the airbags in contact with each other are staggered Hemispherical grooves and hemispherical protrusions are provided. 6. The recumbent two-wheeled bicycle according to claim 5, wherein the shock-absorbing pad is arranged as a structure in which shock-absorbing units are arranged at equal intervals, and the shock-absorbing unit is arranged as a cylindrical sponge with a spring sheathed on the outside pad. 7. The recumbent two-wheeled bicycle according to claim 1, wherein the frame is a detachable structure made of chrome-molybdenum steel; the handlebar is made of aluminum alloy; the end of the handlebar A handlebar cover made of rubber material is provided. 8. The recumbent two-wheeled bicycle according to claim 1, wherein the chain is a structure in which an inner chain plate, an outer chain plate, a roller, a sleeve and a pin are connected to each other, and the pin and the sleeve Conical wear-resistant blocks are set on the contact surface.