The invention relates to the drive of the propulsion of the bike, not interacting with the road surface. Aerodynamic propulsion 8, as centrifugal fans, throw the air in the plane of rotation of its wheels and are located on both sides of the frame. Rotation is transmitted from the pedal drive 2, 11 directly on the rear wheel 5 is excluded. Rotation of the impeller both propellers 8 provided with a common shaft 9, on which is rigidly mounted a gear 10. Axis 4 is rigidly fixed to driven sprocket 7 and the gear wheel 6 which is connected to the gear 10. Rear wheel 5 has only the possibility of rotation on the axis 4, which is mounted for rotation in the rear fork of the frame. Possible replacement of wheels on skis or skates. The proposed solution is aimed at increasing the speed of the bike. 5 Il. The invention relates to bicycles and can be used to increase the speed of the bike on a flat (no lift) the road. The use of the present invention is limited to roads with a slope of not more than 12 degrees.Known bike, containing frame, the pedal actuator mounted therein, a chain drive connecting the pedal love the fork frame, rigidly connected with the wheel, a saddle mounted on the frame, and manual brake device (see, for example, the directory rental IN Perm machine-building plant named after. The October Revolution, the order of the red banner type. ed. "Star", 614600, , Perm, GSP-131, street Friendship, D. 34, order 5764).The driving force behind this famous bike is the interaction force of the rear drive wheel with the road.The maximum speed of the bike is reached at the maximum speed of rotation of the crank pedal driveWmax.Upon reachingWmaxthat can't be more specific physiological limit of the person, the speed of the bike can not be increased, because it needs to increaseWmore than physically possible limit. Therefore, despite intensive pedaling, the leading wheel just rolls on the road, but not repelled from it.This can be considered a disadvantage of this bike, if road conditions allow a higher speed of movement.Also known aerodynamic propulsion, the thrust vector which is located in the plane of rotation of its rebocho design, includes case and installed it with the possibility of rotation of the impeller during rotation which creates traction T acting on the body of the thruster. Thus T =2R3h, where- air density;- angular velocity of rotation of the impeller propulsion; h - height of the impeller (the width of the blades of the impeller).The above disadvantage of this bike is eliminated by the fact that the bike that contains the frame, the pedal actuator mounted therein, a chain drive connecting the pedal drive with the leading of the rear wheel, mounted in the rear fork of the frame, front wheel, installed in the front swivel fork frame rigidly connected with the wheel, a saddle mounted on the frame, and manual brake device is equipped with two aerodynamic propulsion, the thrust vectors which are located in the plane of rotation of the impeller rigidly mounted on the frame on either side of the rear wheel, the rear wheel is mounted for rotation on an axis, installed rotatably in the rear fork of the frame, on an axis fixed driven sprocket and a gear wheel connected to drive the accounting resistance force) of the driving force (thrust T), independent from the speed of its movement, and thus, in accordance with the formula T=mand to get the acceleration, i.e., to increase the speed (here m is the mass of the bike with the rider, a - acceleration). When this driving force T is obtained without device switching speeds.In Fig.1 shows the scheme of the proposed bike with aerodynamic propulsion.In Fig.2 is a circuit installed in the rear fork axis mounted on it driven sprocket, gear wheel and mounted therein for rotation of the rear wheel.In Fig. 3 gives a diagram of a Bicycle mounted on the skates (skate bike).In Fig.4 presents a diagram of the ski bike (side view).In Fig.5 - the same, top view.The bike consists of a frame 1 mounted inside the pedal actuator 2. In the rear fork 3 frame mounted for rotation axis 4, which is rotatably installed in the rear wheel 5. Axis 4 is rigidly fixed gear wheel 6 and the sprocket 7. On the frame 1 on both sides of the wheel 5 attached two aerodynamic propulsion 8, having one common axis of rotation 9 of the impeller propulsion. On the axis 9 is fixed a gear wheel 10, concatenate with the toothed wheel 6. When atiana with a leading asterisk 12 foot actuator 2.The bike works as follows. When the rotation of the pedals, through the chain to speed up the transmission rotates the axis 4. To speed up the transmission comprising gear wheels 6 and 9, causes the rotation of the impellers propulsion 8. The air emitted by the propulsion creates their bodies thrust T, driving the bike forward.For example, the angular velocity of rotation of the propeller= 120c-11200 rpm, R = 0.25 m, h = 0.36 m speed vent air V =R = 1200,25 = 30 m/sThen
Power to be used
Such capacity cyclist able to spend in a long time.Thus the gear ratio from the crank to the shaft of the propulsion
With a transmission from rods to the axis 4 of the wheel
the gear ratio from the axis 4 to the axis of the thruster
that is quite feasible. Hereo- the angular velocity of the rotation axis 4.In the famous bike rods RWis the radius of the rod,
iW-number- gear ratio from the connecting rod to the leading wheel of the bike.If Rnumber= 30 cm, RW= 18 cm, F = 50 kg (force almost equal to the weight of the cyclist),
Thus, the maximum driving force is known bike does not exceed 10 kg, but at low speed, because the
Wnot more than 0.5 rpm3c-1,
and the speed of the bike
Power to be used when this
If you take that
and the speed of the bike when Rnumber= 0.3 m
At this speed value is the force of drag Q acting on a bike with a rider.It is known that the force of drag
where Cx- the drag coefficient,
S - midship bike
is the density of air,
Vled- speed 232D/img_data/61/611925.gif">
Q = 0.50,50,12516,72/2 = 4,5 kgThus, if speedwe offer bike has a driving force (T-Q) = 10-4,5 = 5.5 kg, which allows to develop him even more speed, until the moment when the resistance becomes equal to the driving force.Indeed,
G is the weight of the cyclist with bike
g - acceleration of free fall)
and after time t = 6 speed bike
Vled.= Vabout+at = 16,2+0,556 = 19,5 m/c = 70 km/hFamous bike at a speed of Vled= 16 m/s is the angular velocity of rotation of the wheel
what is the marginal physical speed of rotation of the crank pedals and, consequently, the speed of the bike can't be more enhanced.It should be noted that the proposed bike cannot overcome rise (slope) of the road above 12 degrees, becauseTGsin12o.When G = 75 kg
T750,2 = the unit is designed for use on flat roads, where it offers a higher speed. Despite the additional elements (propulsion and gear drive), the design of the bike a little more complicated, because there is no need for the device to change the speed, and propulsion and a gear wheel on the axis of the rear wheels can be made of light plastic materials. If you replace the wheel on a pair of skates - front and rear (or skis), you get a ridged bike that can be used on the rollers, i.e., to move on ice.
Bike, containing frame, the pedal actuator mounted therein, chain drive, rear wheel mounted in the rear fork of the frame, front wheel, installed in the front swivel fork frame rigidly connected with the wheel, a saddle mounted on the frame, and manual brake device, characterized in that it has two aerodynamic propulsion, the thrust vectors which are located in the planes of rotation of the impeller rigidly mounted on the frame on either side of the rear wheels, impellers aerodynamic propellers mounted on a common shaft, the rear wheel is mounted for rotation on an axis, installed the, the United States with a drive gear mounted rigidly on a common shaft aerodynamic propulsion.
FIELD: transport engineering.
SUBSTANCE: invention relates to snow-planes set into motion of by turbomachine of air propeller type. Driver's seat 3 is installed in body 1 of snow mobile. Body 1 is attached to bottom 2 providing it's sliding on snow and ice. Engine is mounted on bottom 2 and turning axles of levers of independent brakes are arranged in rear part of bottom. Snowmobile is furnished with two aerodynamic propulsive devices whose housings are secured on bottom 2 and on side walls of snow mobile body 1. Working wheels of propulsive devices have flat radial blades secured square to plane of rotation on shaft common for wheels of both propulsive devices.
EFFECT: reduced specific load on snow surface, increased cross country capacity.
SUBSTANCE: proposed vehicle comprises body with rotation drive and two operating shafts with the lever attached thereto, the lever being furnished with larger weight. Each lever is furnished with smaller weight and represents crossarm, bell crank relative to center of weight of the traverse axle. Larger weight is fitted on the crossarm longer arm. Larger weight represents a weight-rotor coupled with crossarm motor and fitted on the axle arranged across the crossarm crosswise axis. Aforesaid weight-rotor is articulated with crossarm via gear drive to allow crossarm and weight-rotor rotating relative to each other. Body drive is articulated with crossarms axles via transmission to rotate every crossarm. Vehicle design version comprises weight-rotor representing rotary power plant with rotation drive and control system. Versions of proposed method allow for using appropriate vehicle design versions.
EFFECT: expanded performances.
8 cl, 23 dwg
SUBSTANCE: invention relates to paraplanes. Proposed kite comprises canopy, canopy shroud lines, control strips connected with the latter and control handles and load-bearing strips connected with handles and canopy shroud lines. Proposed kite comprises additional load-bearing strip on every control handle. Load-bearings strips and control strips are interconnected via two rollers and connected to canopy shroud lines. Additional load-bearing strip is connected via roller and additional strips with canopy shroud lines.
EFFECT: increased thrust at weak wind.