Athlete training device

Abstract

The present device is designed for training of highly-qualified athletes in cyclic sports. The technical result is the more reliable transfer of power from a drive to a working mechanism with the possibility of smoothing out ultrashort fluctuations (0.3-0.7 seconds) in force. The athlete training device comprises two bases, each having a pulley attached thereto for rotation in a single plane. An annular cable track is fastened between the pulleys. With the aid of a motor, a rotation rate is transmitted to one of the pulleys via a shaft. The shaft, which consists of a driving part and a driven part, has mounted thereon an adjustable transmission for controlling torque. The adjustable transmission is in the form of an electromagnetic powder clutch, consisting of a driving part, connected to the driving part of the shaft, and a driven part, connected to the driven part of the shaft. The driven part of the clutch is mounted with clearance in a coaxial cavity in the driving part, the clearance gap between the driving part and the driven part of the clutch containing a ferromagnetic powder having viscosity adjusted by a clutch controller.

Claims

1. A device for training sportsmen, comprising: two bases situated at a distance from each other; two sheaves that can rotate in one plane and secured one sheave on one base for both sheaves; an annular ropeway fastened between the sheaves; one end of a halliard attached to the ropeway and a sportsman fastening device attached to its other end; an engine rotating a shaft, which transmits rotational velocity to one of the sheaves; on the shaft, which includes a driving part and a driven part, a regulated transmission is installed in order to control torque; wherein the regulated transmission is an electromagnetic powder clutch that includes a driving part attached to the driving part of the shaft and a driven part attached to the driven part of the shaft; wherein the driving and driven parts of the clutch have been made in the form of steel cylinders; wherein an annular groove of the driven part of the clutch contains an exciting winding connected to a source of direct current via contact rings and brushes; wherein the driven part of the clutch is installed with a clearance in a coaxial cavity of the driving part of the clutch; wherein, in the clearance between the driving part of the clutch and the driven part of the clutch, there is ferromagnetic powder, We viscosity of which is regulated by means of a clutch controller.

2. The device for training sportsmen according to claim 1, wherein the halliard is attached to the annular ropeway by a clamp operable to regulate its length.

3. The device for training sportsmen according to claim 1, wherein shaft's rotational speed is regulated and controlled by a regulator.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The claimed technical solution is further shown in more detail in the drawings where:

(2) in FIG. 1 there is a schematic image of the claimed device; and

(3) FIG. 2 shows the sectional regulated transmission.

DETAILED DESCRIPTION OF THE INVENTION

(4) The claimed device contains a power drive (engine), which can be an electric, internal combustion one, etc., and an actuator (the rest of the device).

(5) The claimed device contains two bases (1, 2) situated at a distance from each other necessary for the sportsman to train; the sheaves (3, 4) that can rotate in one plane have been secured on each of the bases. The annular ropeway has been fastened (5) between the sheaves (3, 4); one end of the halliard (7) has been attached to the ropeway by means of the clamp (6), with the possibility of regulating the length of the halliard; the sportsman fastening device (8) has been attached to its other end (not shown in the figure). The engine (10) rotates the shaft (9), and its rotational velocity is transmitted to the sheave (3); the velocity can be controlled and regulated by means of the regulator. And on the shaft (9), which consists of the driving part (12) and driven part (13), the regulated transmission (11) has been installed in order to control the torque. The regulated transmission (11) is an electromagnetic powder clutch, which consists of the driving part (14) attached to the driving part (12) of the shaft (9) and of the driven part (15) attached to the driven part (13) of the shaft (9). The driving (14) and driven (15) parts of the clutch have been made in the form of steel cylindersmagnetic conductors. The annular groove of the driven part (15) contains the exciting winding (16) connected to a source of the direct current U via the contact rings (17) and brushes (18). The driven part (15) of the clutch has been installed with the clearance in the coaxial cavity (19) of the driving part (14). In the clearance between the driving part (14) and the driven part (15) of the clutch there is ferromagnetic powder (20), the viscosity of which is regulated by means of the clutch controller.

(6) The route movement speed (measured in meters per second) is regulated by means of the engine controller (regulator), and the torque (measured in kilogram-force meters) is regulated by means of the clutch controller.

(7) The principle of the clutch operation is the following: when the clutch controller supplies a constant voltage U to the exciting winding, a current appears in the latter; the current generates an exciting flux that affects the ferromagnetic powder and magnetizes it. The magnetized particles of the powder create magnetic chains that form up along the magnetic lines of force. These chains transmit the force of attraction between the driving and driven parts of the clutch. The cohesion force between the driving and driven parts of the powder clutch is proportional to the current that flows through the exciting winding.

(8) At that, the use of the claimed clutch in the claimed device ensures also the possibility of remotely regulating the value of the transmission of the torque to the sheave.

(9) The availability of the electronic controller of the clutch operation permits accurately presetting, stably maintaining for a long time and instantly changing the characteristics of the exertion transmitted to the sportsman in conformity with their individual capabilities, current physiological state and training plan, for example, stepwisely decreasing or increasing the exposure because of accumulation of tiredness directly during an exercise or from an exercise to exercise.

(10) If the rotational speed of the clutch's driving part exceeds the one of the driven part, the self-acceleration characteristic of powder clutches makes it possible to automatically compensate the undesirable fluctuations of the intracyclic velocity of the sportsman (to which high-class sportsmen are especially sensitive and which are a separate area of training) and to maintain the necessary exertion when passing the unloaded sections of the training route (turns, changing landscape relief, etc.).

(11) The high degree of accuracy of dosing the exertion coupled with a wide linear range is critical for the individual workouts of highly-qualified sportsmen because of the low degree of adaptation of their physical qualities and its variable dynamics. The productivity of applying such exercise machines and the need for them are closely related to the accuracy of getting within the close limits of the sportsman's current adaptation.

(12) By virtue of the high viscosity characteristics of the clutch's working substance (ferromagnetic powder), at the same time the clutch is an effective damper between the drive (engine) and the sportsman, which decreases the probability of injuries during the falls, sport machinery failures and other emergencies.

(13) The availability of a developed system for the remote control makes it possible to manage the training process without the trainer's moving along extensive sport facilities and to use network solutions, including the Internet. It is possible to control several devices through the Internet simultaneously.

(14) It is possible to record the individual training profile using a computer, with subsequently analyzing the profile by the value of the controlling current supplied to the clutch. The clutch serves as a sensor of the exertion transmitted to the sportsman.

(15) The compact, well-protected form factor permits the claimed device to operate under unfavorable environmental conditions: the high humidity of (swimming) pools or sharp drops of climatic conditions during its operation outside indoor sport structures (outdoor stadiums, winter sports).

(16) Autonomous power sources can be used in the claimed device; if they are used for various reasons (safety requirements in swimming pools, operation under field conditions, electrical network irregularities, etc.), the electricity consumption is significantly decreased, which, in turn, positively influences the reliability of the workout by virtue of using locations independent of the electricity networks.