SU1731246A1 - Bicycle rider simulator - Google Patents

Abstract

SUMMARY OF THE INVENTION: A package of three sprockets 11-13 with their switching mechanism 17 is mounted on the foot drive shaft. An asymmetrical sprocket 15 is mounted on the shaft of the load means 3. This sprocket has a concave portion 1/4 of the circumference. The sprockets of the foot drive have a circumference equal to, greater and smaller than the circumference of the asymmetric sprocket. This allows you to create different loading modes in the rotation phases. 7 il.

Description

1

The invention relates to the manufacture of simulators for athletes, as well as to devices used in medicine.

A device for training athletes is known, consisting of a foot actuator mounted on a frame and kinematically interconnected and means for creating a regulating load.

A disadvantage of the known device is the low efficiency of the training.

The closest to the described invention is a device for training athletes, consisting of a foot actuator mounted on the frame and kinematically interconnected and means for creating a regulating load, while the foot actuator is designed as an asymmetric sprocket with a constructive ability to autonomously vary the load by the phases of rotation by shifting the ellipsoid portion of the sprocket while pedaling.

A disadvantage of the known device is the limited training efficiency due to the inability to control the load mode in phases of rotation.

The purpose of the invention is to increase the effectiveness of the workout by controlling the load in the phases of rotation.

FIG. 1 shows a device for training athletes, a general view; in fig. 2 - foot drive consisting of a package of stars (3 pieces}; in Fig. 3 - view A in Fig. 2; in Fig. 4 - an asterisk, concave 1/4 part, general view; in Fig. 5 - kinematics: A is the circumference of the leading sprocket greater than the circumference of the driven sprocket, B the circumference of the leading sprocket is equal to the circumference of the driven sprocket, C is the circumference of the leading sprocket less than the circumference of the driven sprocket; driven asterisk, and the chain tension regulator; in Fig. 7 - the switch is leading x stars.

The device for training the athletes is provided with a foot actuator 2 mounted on the frame 1 and kinematically connected to each other and a means for creating an adjustable load, including a disk 3 in contact with the brake band 4, one end of which is connected through an elastic element 6 with a measuring device 7, in the form of a dynamometer. At the same time, the device is equipped with a cable block system 8 and 9 and a tension tape regulator 10, made in the form of a screw pair (Fig. 1). Foot drive 2 (Fig. 1-3) is made in the form

cassettes of three stars 11-13, connected by a chain 14c driven by an asterisk 15 means for creating a load. The device is also equipped with a tension regulator 16.

chain and switch 17 leading sprockets connected through the cable block system 18 and 19 with the lever switch 20.

The device works as follows.

0 Takes place on the simulator (Fig. 1), sits in the saddle 21, picks up the steering wheel 22, puts the feet on the pedal 23 and 24, hand adjusts the tension of the brake tape 10 to the desired load

5 on the dynamometer 7. Having established a predetermined load, the occupant turns the switch 20 to the desired mode, while the switch 17 of the leading sprockets transfers the circuit 14 to one of the sprockets

0 11-13, corresponding to the specified training mode. Having set all these values, the occupant begins to rotate the pedals 23 and 24 of the foot actuator 2, and the following occurs.

5 Occupied by the switch 20 by setting the training mode. Effect on a certain phase of rotation in which the chain 14 takes place on the middle sprocket 12 of the foot cassette.

0 of drive 2, Since the circumference (number of teeth) of the middle sprocket 12 is equal to the length of the generator of the driven sprocket 15, when the pedals 23 and 24 are rotated, the angular displacements of the points a and a j will be the same

5 (FIG. 5B). Due to the fact that the driven sprocket 15 has a concave 1/4 part (radius n is greater than the distance T2 at the point of the center of the concavity D (Fig. 4), the load transferred from the load generating means will be

0 the concave part of the asterisk is larger than the rest of the asterisk. As a consequence, the load of different phases of rotation is transmitted by the circuit 14 to the foot actuator 2 identically. Regulator 16 tension chain

5 (Fig. 6), turning, changes the length of the chain 14, depending on the location of the concave part of the sprocket 15.

Occupied by setting switch 20, exercise mode Changing the effect on a particular phase of rotation as the pedals move. The chain will take place on the outer sprocket 13 of the foot drive cassette 2. Since the circumference (number of teeth 5 of it) of the outer sprocket 13 is greater than the length of the generator of the driven sprocket 15, then as the pedals 23 and 24 rotate, point a will shift relative to point ai pedal rotation by an amount equal to the difference in circumference of the sprocket 13 and

the length of the generatrix of the driven sprocket 15, as a result, and the phase load will be constantly shifted in the course of rotation (Fig. 5A).

The occupant through switch 20 sets the training mode to change the effect on a particular phase of rotation against the stroke of the pedals. In this case, the circuit 14 will take place on the inner sprocket 11 of the foot drive cassette 2. Since the circumference of the inner sprocket 11 is less than the length of the generator of the driven sprocket 15 means for creating a load, as the pedals 23 and 24 rotate, point a will shift towards point ai the course of pedal rotation by an amount equal to the difference in the length of the generator of the driven sprocket to the circumference of the sprocket 11. due to

This and the phase-wise load will be constantly shifted against the rotational course (Fig. 5C).

Claims (1)

Invention Formula A cycling training device comprising a foot actuator kinematically coupled to the load means via an asymmetric sprocket to create a controlled rotational load, characterized in that, in order to increase the training efficiency by controlling the rotational load, the kinematic coupling of the foot actuator to the load means includes three asterisks with their switching mechanism, mounted on the drive shaft and having a circumference equal to, greater and smaller than the circumference of the asymmetric sprocket. 23 End. A 13 12 II Fa b AT FagL 15 L s 0 0 S e n Fig 7