Bicycle

FIELD: transport.

SUBSTANCE: bicycle relates to backrest bicycles, so-called, recumbent. Proposed bicycle consists of two frames jointed via pivot joint and shock absorber. Seat is attached to frame rear part, while fork (12) seats in bearings (10) with two wings (14, 15) and steer, located at bottom and top parts, respectively. One wing (14) is secured by split joint (16) to nut (17) screwed on axle (18) with hole. Another wing (15) is secured by split joint (19) to eye (2) with hole fitted on axle (18) with hole and has flange (21) on its end. Hub (23) of front wheel (3) is fitted on axle (18) with hole in bearing (22) mounted between nut (17) and eye (18). Two tubes (26, 27) with bearings (28, 29) on its ends are secured to front part of frame (5) of the sides of front wheel (3). Said tubes receive shaft (3) with con rods (31, 32) and pedals 33 on ends. Shaft (30) passes through axle (18) with hole. Shaft (3) is coupled with rear wheel via chain gear (40).

EFFECT: higher reliability of front wheel bearing, simple dismantling of front wheel.

4 cl, 4 dwg

 

The invention relates to vehicles with a muscular drive and can be used for movement.

Famous bike "BIGHA", commercially available in the United States, with a seat in a chair with a backrest and carrier rods and pedals located above the swivel front wheel and chain transmission, connecting the carriage with the rear wheel (see www.membrana.ru).

This bike is inconvenient that have high to pull up his legs over the front wheel, and also because of the small diameter front wheels this bike has low permeability.

Famous bike "Ranger", commercially available in the United States, with a seat in a chair with a backrest and carrier rods and pedals, located in front of the swivel front wheel and chain transmission, connecting the carriage with the rear wheel (see www.velomobil.nm.ru).

This bike has, long base, very large dimensions and weight.

Closest to the claimed is a Bicycle, comprising a frame with a seat mounted on the rear drive wheel and front swivel wheel the hub of which is provided with a bearing mounted on the axis with a through hole. This axis is fixed to a single console Peru rotary plug. The axis of the plug fixed in bearings of the frame and provided with a wheel on the end. To the frame in bearings attached to the shaft with cranks and pedals is on the ends the shaft passes through the hole of the wheel. When this shaft is connected by two chain drives through the intermediate shaft located near the fork, and freewheel with the rotation of the rear wheels (see application US 20060001232).

The disadvantage of this bike is the lack of angle of rotation of the fork of the front wheel, and with it the low maneuverability of the bike, as for console mounting axis with a through hole stylus plug for rigidity should be broad.

But when turning the plug, even if, as expected, to shift the axis with a through hole forward of the axis of rotation of the fork for better handling, wide fork feather even with a small turn abuts the bearing shaft of the carriage. To extend the distance between the pedals is highly undesirable, as the pedals and so are much wider than those of well-known rental. In addition, console mounting axis on potholes due to elastic deformation of the only pen fork leads to the stroke axis with the hole on the shaft with rods, which will lead to the release bearing of the front wheel down. The two transmission chain transmission has lower efficiency, and the location of one of asterisks in place of the movement of the knee cyclist will interfere with pedalboat. The disadvantage of this bike is also the difficulty of removing the wheel to repair the camera if PR is the stake.

The aim of the present invention is to improve usability by improving the maneuverability without extending the distance between the pedals. This goal is achieved by the fact that the bike consists of a frame with a seat mounted on the rear drive wheel and front swivel wheel the hub of which is provided with a bearing mounted on the axis with a through hole, which is fixed to the swivel fork axle which is fixed in bearings of the frame and provided with a wheel on the end, to the frame in bearings attached to the shaft with cranks and pedals on the ends so that the shaft passes through the hole of the wheel axis, the shaft is connected with a chain and freewheel with the rotation of the rear wheels.

What's new is that the plug is provided with two feathers covering the wheel on both sides. One feather plugs attached plug connection, for example a screw, nut, wound on an axle hole, and the other fork feather attached plug connection, for example by screws, to a lug with a hole, thrown over the axle with a hole and having at one end a flange, while the nut presses the bearing mounted on the axle with a hole for the eyelet and through it to the flange on the end of the axis. The bike can be made to quickly remove the wheel with its puncture shaft with rods on the ends are made of two parts, the United States is x screw connection. The bike can be made so that to improve the ease of driving and quick disassembly of the Bicycle for transportation other transport frame it consists of two parts connected by a hinge with a horizontal transverse axis, with one of the frames hinge one end attached to the shock absorber, which is the other end with a hinge attached to the other frame, with the seat attached to the rear frame and the front part of the frame attached two deflecting roller for the two branches of the circuit, while the rollers are located under the seat and above the axes of the wheels. The bike can be made so as not to dirty the chain leg, and also not to allow the wheel to RUB on the chain by turning the plug in the end position, on the upper branch of the chain around the front wheel wearing a plastic tube, and attached to the fork stop, upiralsia in the tube and in the lower branch of the chain while turning the fork of the front wheel.

The invention is illustrated by drawings.

Figure 1 depicts the bike from the side.

Figure 2 depicts the front wheels with partial cuts.

Figure 3 - section a-a in Fig 2.

Figure 4 depicts the front wheels with two bearings in the sleeve.

The Bicycle includes a frame with a seat 1, mounted on the rear drive wheel 2 and the front swivel wheel 3. The frame consists of frames 4 and 5, connected by a hinge 6 with horizontal polarization is pepper axis. To the frame 4 by a hinge 7 is attached to the absorber 8, which hinge 9 is attached to the frame 5. To the frame 5 in bearings 10 are attached to the axis 11 of the rotary plug 12 and provided with a wheel 13 at the upper end. The plug 12 is equipped with feathers 14 and 15, covering the wheel 3. One feather 14 plug connection, for example by a screw 16, is attached to the nut 17, wound on the axis 18 with a through hole along it. Another feather 15 plug 12 attached plug connection, for example by screws 19, to the eyelet 20 with a hole, thrown over the axle 18. The axle 18 has at one end a flange 21, which is provided with slots for twisting axis 18 in the nut 17. Between the nut 17 and the ring 18 is clamped in the bearing 22, which is mounted in the sleeve 23 of the front wheel 3 and is clamped therein by a ring 24 with an external thread. The ring 24 for winding provided with slots 25 on the end. To the frame 5 at the sides of the front wheel 3 attached two tubes 26 and 27, in which the ends of the fixed bearings 28 and 29. In bearings mounted shaft of the carriage 30, provided at the ends of the rods 31 and 32 with pedals 33 and 34. Pipes 26 and 27 for rigidity attached to the frame 5 additional spacers 35. The shaft of the carriage 30 is kinematically connected with a chain and freewheel 36 with the rotation of the rear wheels 2. Chain transmission consists of a sprocket 37 and sprocket unit 38 with monetary the shifter 39, on which was drawn the circuit 40. On the frame 5 under the seat 1 updat the additional fixed for deflecting circuit 40 rollers with flanges 41 and 42. In order not to spoil the foot of the chain 40, the upper chain 40 thrown over the plastic tube 43, one end of which is attached to the pipe 26. The plug 12 is attached to the stop 44, deflecting both branches of the chain from the wheel 3 at the turn of the fork 12. For convenient control of the axle 18 of the plug 12 should be carried out with removal of the axis 18 forward on the distance L with respect to the axis 11 of rotation of the plug 12. In this case, the angle between the axis of the plug 18 and the axis of the pipes 26 and 27 should be in the range of 3-7 degrees. The connecting rods 31 and 32 are mounted on the shaft of the carriage 30 by nuts 45 and 46. The shaft of the carriage 30 may be made of a composite of two parts connected by a screw connection 47 connected so that when the tightening screw to lock the rods 31 and 32 stood opposite each other. When the puncture is sufficient to spin the pedals towards each other, and screw connection opens. Further, the shaft of the carriage 30 moves to the side. Turned off the screws 16 and 19 and the wheel removed. On potholes due to elastic deformation of the plug 12 possible blow-axis with the hole 18 on the shaft of the carriage 30, which can damage the bearings 22, 28 and 29 of the building. So in the middle of the shaft of the carriage is fixed rubber ring 48, softening the blow. Seat 1 is equipped with guide 49 which is inserted in the clamp 50 attached to the frame 4. The seat is also attached to the collar 51 mounted on the guide 52, priceplan the Yu to the frame 4. This allows you to move the seat 1 and fix it with clamps 50 and 51 under the length of the legs of the driver. Instead of screws 19 and 16 may also be used for fastening clamps. The clamps are attached to the nut 17 and the ring 18, and the feathers 14 and 15 are supplied with pins on the end and inserted in these clamps. When removing the axes of the hinges 6 and 9 bike splits into two approximately equal parts, which is convenient for carriage by other means of transport. Stated the bike has enough maneuverability, comfortable fit, provides a comfortable ride on any road.

1. A Bicycle including a frame with a seat mounted on the rear drive wheel and front swivel wheel the hub of which is provided with a bearing mounted on the axis with a through hole, which is fixed to the swivel fork axle which is fixed in bearings of the frame and provided with a wheel on the end, to the frame in bearings attached to the shaft with cranks and pedals on the ends so that the shaft passes through the hole of the wheel axis, the shaft is connected with a chain and freewheel with the rotation of the rear wheels, characterized in that the plug has two feathers covering the wheel with two sides one pen which is attached a detachable connection, such as a screw, nut, wound on an axle hole, and the other fork feather attached plug connection, for example the er screw, to lug with hole, thrown over the axle hole, and having at one end a flange, while the nut presses the bearing mounted on the axle with a hole for the eyelet and through it to the flange on the end of the axis.

2. The Bicycle according to claim 1, characterized in that the shaft with rods on the ends are made of two parts connected by a screw connection.

3. The Bicycle according to claim 1, characterized in that the frame consists of two parts connected by a hinge with a horizontal transverse axis, with one of the frames hinge one end attached to the shock absorber, which is the other end with a hinge attached to the other frame, with the seat attached to the rear frame and the front part of the frame attached two deflecting roller for the two branches of the circuit, while the rollers are located under the seat and above the axes of the wheels.

4. The Bicycle according to claim 1 or 3, characterized in that on the upper branch of the chain around the front wheel wearing a plastic tube, and the plug attached to the fence, leaning on the tube and in the lower branch of the chain while turning the fork of the front wheel.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention refers to control facilities for automatic gearshift on bicycle when fluid pressure changes which operates when angular velocity changes with subsequent connecting auxiliary force from bushing of rotating wheel for rear gear selector operation. Spring-loaded control link (9) is rotated by bushing (8) of front wheel and is connected with device for shifting control link (9) depending on increase or decrease of bicycle speed. The device for shifting control link (9) contains circular screw (21) which is fixed relative to axis of the front wheel and circular channel (22) which is attached to control link (9). Circular screw (21) enters with gap into circular channel (22) with high-viscosity substance (23). Equilibrium of the link (9) between butt ends of half couplings (10, 11) is provided by spring and pressure of high-viscosity substance (23) which is charged by circular screw (21). When motion speed increases the pressure of charged substance (23) also increases, and the link (9) joins with threaded half clutch (11) movable on threaded axis section (7). Subsequent displacement of threaded half clutch (11) along axis (7) via cable (6) controls rear selector to switch chain from large sprocket to smaller sprocket. When motion speed decreases the pressure of charged substance (23) also decreases and the link (9) joins with reverse half clutch (10) which rotates threaded half clutch (11) in reverse direction via ball-type satellites (14). As a result of reverse displacement along axis (7), threaded half clutch (11) via cable (6) controls rear selector to switch chain from smaller sprocket to larger sprocket.

EFFECT: design simplification and dimensions and weight reduction.

2 dwg

FIELD: transport.

SUBSTANCE: invention relates to automatic speed control of bicycle with the help of centrifugal force of rolling loads with following assisting force connection from spinning wheel plug for operation of back speed switch. Control link (9) is brought into rotation with plug (8) of front wheel and connected by means of a rope to centrifugal weights (12) the action of which on link (9) is balanced with spring (20). When centrifugal force increases, link (9) joins threaded half-coupling (11) movable in threaded section of axis (7). Further displacement of threaded half-coupling (11) along axis (7) through rope (6) controls the back switch in order to switch the chain from bigger sprocket to smaller one. When centrifugal force decreases, link (9) joins reverse half-coupling (10) which through satellites in the form of balls (14) rotates threaded half-coupling (11) in opposite direction. As a result of reverse displacement along axis (7) threaded half-coupling (11) controls the back switch through rope (6) in order to switch the chain from smaller sprocket to bigger one. Fork (18) is fixed relative to axis (7) of fork of the front wheel and includes longitudinal slots (19) throughout the width of balls (14). Locking and spring-loaded rings (16), (17) form a gap-free link rail for balls (14).

EFFECT: simplifying the design and decreasing dimensions and weight.

2 dwg

Bicycle // 2281876

FIELD: transport engineering; bicycles.

SUBSTANCE: invention relates to bicycles with elastic rear suspension and two-step chain in rear wheel. Gear ratio changer and driven sprocket 5 of first step and driving sprocket 6 of second step combined axially with gear ratio changer are arranged on suspension lever 3 so that their axle 4 is located between axis of shaft of cranks with pedals and turning axle 13 of suspension lever 3, preferably in one plane, tilted to front wheel at angle of 60°-80° to road surface. Invention simplified combination of suspension and drive as it makes possible to avoid combination of axle of suspension turning lever and axle of intermediate link with first step driven sprocket and second step driving sprocket.

EFFECT: prevention of swinging of suspension at active pedalling.

3 cl, 2 dwg

Derailleur gear // 2252891

FIELD: transport engineering; bicycles.

SUBSTANCE: invention relates to device for automatic speed changing of bicycle depending on tension of chain. One end of lever 6 is hinge-connected with bicycle frame and is provided with lock 8. Other free end of lever 6 is pressed to chain 11 by spring 10. Tension of chain 11 is changed at change of speed of rotation of pedals which provides lifting or lowering of lever 6 and also tie-rod 5 coupled with cable 3 of standard derailleur gear. With intermediate gear engaged, lock 8 provides position of lever corresponding to definite driven sprocket 2.

EFFECT: simplified automatic derailleur gear.

1 dwg

Derailleur gear // 2252891

FIELD: transport engineering; bicycles.

SUBSTANCE: invention relates to device for automatic speed changing of bicycle depending on tension of chain. One end of lever 6 is hinge-connected with bicycle frame and is provided with lock 8. Other free end of lever 6 is pressed to chain 11 by spring 10. Tension of chain 11 is changed at change of speed of rotation of pedals which provides lifting or lowering of lever 6 and also tie-rod 5 coupled with cable 3 of standard derailleur gear. With intermediate gear engaged, lock 8 provides position of lever corresponding to definite driven sprocket 2.

EFFECT: simplified automatic derailleur gear.

1 dwg

FIELD: transport engineering; bicycles.

SUBSTANCE: invention relates to front speed changer operated by auxiliary cam. Speed change cam 304 can be connected with rotating pedal shaft by means of clutch member 324 by pulling out control cable 460 laid from speed changer handle on handlebar. With cam 304 rotated, tracer in form of lever 312 pulls out drive cable 340 coupled drive lever used to shift guide of chain. At further rotation of cam 304, release member disconnects clutch member 324 of cam from pedal shaft.

EFFECT: provision of connection and disconnection of cam from pedal shaft so that rotation of pedal shaft can be used for contributing to speed changing.

37 cl, 23 dwg

FIELD: transport engineering: bicycles.

SUBSTANCE: invention relates to electric drives of bicycle speed change control devices. Connecting member 150 is installed for rotation by electric motor and it provides articulated coupling of member 108, 130 with base member 44 or movable member 158. parts 150A, 150B of connecting member 150 pass through opposite holes in case 56 of electric motor, being arranged in opposite holes 116, 154 in coupling member 108, 130. drive member 204 can be installed for rotation together with connecting member 150, being connected with rotation energy accumulator 218 of connecting member 150. Clutch can be installed in line of transmission of force between motor and connecting member 150. motor can be arranged in coupling member 94, 108, 130 for rotating connecting member 150 through worm wheel or bevel gear. Sprocket rotation check sensor can be secured to base member 44. mechanism to determine position of movable member 158 relative to base member 44 can be connected through connecting member 150.

EFFECT: compact design, resistance to contamination.

24 cl, 13 dwg

FIELD: transport engineering; bicycles.

SUBSTANCE: invention relates to bicycle speed change control devices operated by cable. Intermediate member 18 is connected with bracket 14 by means of hinge pin 38 for turning around area 39 of hinge joint, being cross section of hinge pin 38. Guide surface 55 of cable is arranged visually intersecting area 39 of hinge joint in projection to axis of hinge joint. Intermediate member 18 can be arranged on inner side of bracket 14, and cable guide roller 54 can be arranged on outer side surface of bracket 14. Axis of cable guide roller 54 can be arranged on intermediate member 18 between area 39 of hinge joint and connecting mechanism in form of lever links 58, 62. Invention is aimed at elimination of undesirable tensioning of cable when intermediate member 18 turns relative to hinge pin 38 at changing of speeds.

EFFECT: improved accuracy of speed change control.

21 cl, 15 dwg

FIELD: transport engineering; bicycles.

SUBSTANCE: when control cable 18 is pointed downwards, detachable adapter device 85 can be installed on front derailleur. When cable 18 is pointed upwards directly from cable clamp 94, device 85 can be removed from front derailleur.

EFFECT: possibility of mounting front derailleur on bicycle frame with cable laid from different directions at minimum increase of weight and sizes.

48 cl, 12 dwg

FIELD: transport engineering; bicycles.

SUBSTANCE: invention relates to automatic or semiautomatic changing of bicycle speeds. First sensor in form of ring element 300 with magnets 304 has splines 354, 358 for definite angular arrangement relative to unit of sprockets coaxial to ring element 300. Second sensor is installed on shifter and is provided with sensor components 308A, 308B displaced relative to each other in circumference to determine speed of rotation and angular position of sprockets which are furnished with device to facilitated transfer of chain from sprocket to sprocket. Said information provides possibility of switching on motor for gear shifting just in moment when guide roller of shifted is close to chain transfer facilitating device.

EFFECT: provision of stepless gear shifting, reduced number of wires.

35 cl, 13 dwg

FIELD: machine building, mechanics.

SUBSTANCE: invention relates to crank drive with sliding saddle. Bicycle frame incorporates guide accommodating saddle slide to move there along 20 cm- to 50 cm-long cranks are arranged in parallel and directed in one direction. Pedals are furnished with feet fasteners.

EFFECT: training whatever muscles.

5 dwg

FIELD: transport engineering; bicycles with crank-and-connecting rod transmission.

SUBSTANCE: proposed bicycle contains frame 1, driven sprocket 5, driven sprocket 2, chain, steering column 6 with handlebar. Reciprocating pedals are secured to levers to of driven sprocket 2 through rigid tie-rods 3. Devices to bring levers of driving sprocket 2 out of extreme point is hinge-secured on frame 1 and on rigid tie-rods 3. Frame 1 of bicycle provides distance of 10 cm between front and rear wheels in operating position of bicycle. Compactness of bicycle at shipment is provided by pressing of pedals to tie-rod 3.

EFFECT: use of rider weight as main moving force.

2 cl, 2 dwg

FIELD: transport engineering; child's vehicles.

SUBSTANCE: turnable shaft 11 is made L-shaped and is coupled from top with handlebar, and lower short flange of shaft 11 serves as axle of driving wheel 12 on hub of which driven bevel gear 18 is secured. Driving bevel pinion 15 is secured on drive crank shaft 14. Twin idler gear is provided with bevel rims D, E on upper and lower ends and is fitted on shaft 11.

EFFECT: facilitated control and assembling.

3 cl, 5 dwg

Pedal drive // 2068364

Bearing seat bike // 2060192
The invention relates to bicycles, to shock and fibroepithelioma support seat for a vehicle, and more particularly to a support seat combined beam containing shock and vibratorteenage layer located between the structural elements made with the possibility of relative displacement, and a shock-absorbing vibration and shock loads

FIELD: transport.

SUBSTANCE: proposed bike comprises front drive multi-speed chain transmission (8, 14) coupled with transfer coupling (9) arranged at top part of fork (10) of front wheel (2). Transfer coupling (9) is coupled, for example gimbal joint (13), with chain transmission (29) to rear wheel (3). One part of gimbal joint (13) fitted on fork (10) is coupled, via chain transmission (21), with transfer coupling (9). The other part of gimbal joint (13) fitted on frame (1) is coupled, via chain transmission (29), with rear wheel (3). Rear drive throw-in mechanism comprises shift lever interacting with drive and idle sprockets fitted on the axle of transfer coupling (9) and coupled, via chain transmission (21), with gimbal mechanism (13).

EFFECT: possibility to throw in rear wheel drive.

5 cl, 3 dwg

FIELD: transport.

SUBSTANCE: pedal scooter comprises frame (1), steering fork (3) with steering column (2), front wheel (7), rear driving wheel (8) fitted on drive axle with a pair of overrunning couplings. Drive levers (9) are hinged onto frame (1) and have feet supports. Proposed scooter is provide with flutes (19) accommodating rollers and flexible con-rods (21), with their one end connected with rollers and flexible con-rods and their opposite connected with driving levers (9). The latter can be furnished with return springs arranged, for example on driving lever hinges. Aforesaid feet support length can be adjusted to suit feet of adults and kids.

EFFECT: reduced height.

3 cl, 5 dwg

FIELD: transportation.

SUBSTANCE: proposed device is brought into motion by pushing from the surface of the earth. Wheel (1) is located between two lateral plates (7, 8), fixed securely with axis (3) of third wheel (1). Plates for legs (9, 10) curve outside below the level of axis (3) of side plates (7, 8), which are formed such that, when the device is in use, they are above the knees of user (21), standing on one or both plates (9, 10) for the feet, providing grip and support for the lower leg. During training the device can have post (13) for balance.

EFFECT: improvement of riding qualities.

6 cl, 16 dwg

Push cycle // 2329911

FIELD: transport.

SUBSTANCE: invention relates to two-wheel saddleless means of travel. The push cycle incorporates a support-and-drive foot-plate with two guides wherein foot-step platform (8) can move coupled by push rod (18) with the lower chain drive circuit (20). Idling of platform (8) is ensured by an elastic element, i.e. spring (27). Steering column is hinged to the frame by mean of cylindrical hinge (5) with transverse-horizontal axis of rotation allowing changing the foot-step and guides inclination.

EFFECT: increase component of working stroke in the reciprocating cycle of the foot-step platforms.

2 dwg

Velomobile // 2299826

FIELD: transport engineering.

SUBSTANCE: invention relates to velomobiles ergonomic parameters of which can be adjusted to suit height of rider. Proposed velomobile contains frame 1, front driving wheel 2 and rear steering wheel 3, handlebar 4, seat 5 and backrest 6. Mudguard 8 is fitted on fork 7 of front wheel on which carriage 9 with drive sprocket and pedals is installed with possibility of changing its position over arc of circumference. Wheel 3 is installed on frame 1 by means of fork 13 and vertical hinge joint 14 whose bushing is rigidly secured on frame and shaft, in top of fork. Handlebar 4 is coupled with wheel 3 by means of steering mechanism with tie-rod 15 and front steering arm 16 and rear steering arm hinge-coupled with tie-rod 15. Handlebar is coupled with vertical part of steering arm 16, and second end of rear steering arm is rigidly coupled with lower end of shaft of hinge joint 14. Vertical part of steering arm 16 is installed on frame by means of rigidly secured steering column (bushing) 18. Handlebar can be tilted forward by friction mechanism 19 by means of which it is coupled with vertical part of steering arm. Telescopic post 20 is provided to change height of handlebar. Seat and backrest are secured on frame by adjuster 25 with setting holes for detachable fastening of lower ends of seat beam 21 and backrest post 24 to change ergonomic parameters. End of rear part of beam 21 is hinge coupled with middle part of post 24 which can be tilted forward at folding. Trough-like beam of adjuster 25 is secured on frame in the rear by means of horizontal hinge joint 26 and at front by means of spring 27. Seat is secured in seat beam by means of runners 29 with longitudinal horizontal slots for additional re-placing of seat along axis of velomobile, and runners are secured inn front by hinge joints, and runners are secured in front by hinge joints, and in the rear by means of springs. Supporting wheels 30 are installed at sides of front wheel with clearance relative to rolling surface. Velomobile is provided with foldable luggage carrier 35, headrest 37, buffer 38 with fairing 40 turnable for folding, and tent 42 stowed in bag.

EFFECT: improved comfort in service.

14 cl, 6 dwg

FIELD: transport engineering; bicycles with crank-and-connecting rod transmission.

SUBSTANCE: proposed bicycle contains frame 1, driven sprocket 5, driven sprocket 2, chain, steering column 6 with handlebar. Reciprocating pedals are secured to levers to of driven sprocket 2 through rigid tie-rods 3. Devices to bring levers of driving sprocket 2 out of extreme point is hinge-secured on frame 1 and on rigid tie-rods 3. Frame 1 of bicycle provides distance of 10 cm between front and rear wheels in operating position of bicycle. Compactness of bicycle at shipment is provided by pressing of pedals to tie-rod 3.

EFFECT: use of rider weight as main moving force.

2 cl, 2 dwg

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