RU217178U1 - FLUID ROWING MACHINE - Google Patents

Abstract

The offer belongs to the class of sports simulators designed to develop the muscles of the upper shoulder girdle, and can be used to train the general health of trainees, as well as special training for water sports athletes. The technical result of the claimed magnetic fluid rowing machine is the possibility of implementing a variable load during one movement or during the execution of successive movements of one series. The technical result is achieved by the fact that a spring and a piston with an electromagnetic coil are installed on the rod inside the sealed housing of the load unit, through channels are made in the piston, connecting the under-piston and over-piston cavities filled with magnetorheological fluid, while the load unit is configured to be controlled by a control unit.

Description

The offer belongs to the class of sports simulators designed to develop the muscles of the upper shoulder girdle, and can be used to train the general health of trainees, as well as special training for water sports athletes.

For physical training of rowers, as well as in mass physical culture and sports, rubber and spring shock absorbers are widely used, which make it possible to simulate movements, including rowing, with weights of various sizes. However, such simulators have a significant drawback: the force applied at the beginning of the stroke is significantly less than that manifested at the end of the stroke, although in fact this is not always the case. Such a load mode is only a special case of a large set of different load modes of a rower athlete. The emphasis of the load on the athlete's shoulder girdle changes all the time and depends on many factors.

Also widely known are rowing machines with hydraulic or pneumatic power cylinders, consisting of: a steel frame, a saddle on a roller system, hydraulic (pneumatic) cylinders and a liquid crystal display.

In simulators of this type, the load is created due to the resistance of the liquid (gas) that occurs when the piston moves inside the hollow cylinder. The load can also be adjusted over a wide range by replacing hydraulic cylinders with different characteristics and (or) adjusting the angle of their installation. Unlike trainers based on rubber or spring shock absorbers, the maximum load on the arm is created in the phase of maximum push speed, and not at the point of maximum distance from the shock absorber attachment point.

A significant disadvantage of this type of simulators, as in the case of rubber or spring shock absorbers, is the inability to regulate the law of load changes during one movement or during the execution of successive movements of one series. That is, when using such a design, it is difficult to provide an individual approach to the training of an athlete.

It should be especially noted that training modes are currently widely used, which involve changing the training load both in the process of performing one movement and during the performance of successive movements of one series.

From the prior art, the Leco Starter rowing machine (http://www.lecoshop.ru/goods.php&id=7253) is known as a prototype, consisting of: a steel frame, a spar on which a saddle is movably placed on rollers, foot rests, levers with handles mounted on hinges, a load unit made in the form of hydraulic cylinders with a rod, and a liquid crystal display.

As a disadvantage of the prototype, it is noted that there is no possibility of regulating the law of load changes in the course of one movement or during the execution of successive movements of one series.

The technical result of the claimed magnetic fluid rowing machine is the possibility of implementing a variable load during one movement or during the execution of successive movements of one series.

The technical result is achieved by the fact that a spring and a piston with an electromagnetic coil are installed on the rod in the sealed housing of the loading unit, through channels are made in the piston, connecting the under-piston and over-piston cavities filled with magnetorheological fluid, while the load unit is configured to be controlled by a control unit.

The proposal is illustrated by drawings.

In FIG. 1 shows a general view of a rowing machine, where 1 is a steel frame, 2 is a spar on which a saddle 3 is movably placed on rollers 4, 5 - footrests, 6 - levers with handles 7 mounted on hinges 8, load unit 9 with a rod 10 and control unit 11 load node.

In FIG. 2 shows a diagram of the load unit 9, where 10 is a rod with a spring 12, 13 is a sealed housing of the load unit, in which a piston 14 with an electromagnetic coil 15 connected to the control unit 11 (Fig. 1) is placed. Piston 14 has through channels 16 connecting the under-piston 17 and over-piston 18 cavities filled with magnetorheological fluid.

The device works as follows.

There are two main positions of the test subject in the simulator:

initial position - when the handles 7 of the levers 6 are in the farthest position relative to the subject (the subject holds on to the handles 7, arms are straightened at the elbows, the body moves forward);

the final position is when the handles 7 of the levers 6 are at the chest of the subject (the arms are bent at the elbows, the body moves back).

The test subject takes a seat in the saddle 3 of the simulator, the feet are placed on the platforms of the footrests 5, the hands are on the handles 7 of the levers 6. The exercise involves the test subject performing a series of movements that imitate the rowing technique with the required duration and pace. Depending on the tasks of training, the nature and magnitude of the load are selected, forming a training plan in control unit 11.

Ensuring a change in the nature and magnitude of the load in different positions of the levers 6 during the cycle of their movement is achieved as follows. When performing movements simulating rowing, the force from the subject through the handles 7 is transmitted to the levers 6, the deviation of which ensures the reciprocating movement of the rod 10 with the piston 14, which move in a sealed housing 13, hinged on a steel frame 1. An electromagnetic coil 15, the control signal to which comes from the control unit 11, changing its magnetic field. With an increase in the magnetic field by the electromagnetic coil 15, the viscosity of the magnetorheological fluid increases, which fills the internal space of the load node 9. The increased viscosity of the magnetorheological fluid prevents its free flow from the under-piston cavity 17 to the over-piston cavity 18 (and/or in the opposite direction) through the through channels 16 in the piston 14 , thus causing an increase in the load on the levers 6.

In turn, in the case when the control signal from the control unit 11 generates a smaller magnetic field, the viscosity of the magnetorheological fluid naturally decreases, which allows it to move more freely from the sub-piston cavity 17 to the over-piston cavity 18 (and/or in the opposite direction) through the through channels 16 in piston 14 under the influence of the subject on the levers 6. The free flow of the magnetorheological fluid between the cavities 17 and 18 of the load node causes a decrease in the load on the levers 6 of the simulator.

After the stroke is completed, the dynamic return of the levers 6 to their original position is ensured by the potential energy of the spring 12 compressed between the sealed housing 13 of the load assembly and the piston 14 (see Fig. 2).

Thus, by changing the magnetic field by an electromagnetic coil, it is possible in principle to implement almost any law of load change.

Compared with the prototype, the proposed magnetic fluid rowing machine has the ability to implement a variable load that changes during the movement in accordance with the physiological characteristics of the trained muscle group.

Claims (1)

A magnetic-fluidic rowing machine, consisting of a steel frame, a spar on which a saddle is movably placed on rollers, foot rests, levers with handles fixed on hinges, characterized in that a spring and a piston with an electromagnetic coil are installed on the rod inside the sealed housing of the load unit, the piston has through channels connecting the under-piston and above-piston cavities filled with magnetorheological fluid, while the load unit is made for connection to the control unit.

Images