RU211884U1 - COOLED LOAD UNIT OF MAGNETIC FLUID EXERCISER BIKE - Google Patents

Abstract

The utility model belongs to the class of sports equipment, in particular to exercise bikes. The technical result of the proposed proposal is to increase the efficiency of the exercise bike by cooling the load unit. The technical result is achieved by installing a heat-insulating casing with holes, inside which a hydraulic turbine with blades is placed, connected by pipelines to the under-piston and above-piston cavities of the sealed housing. Check valves are installed in the through channels of the piston and pipelines.

Description

The offer refers to the class of sports equipment, in particular to exercise bikes.

Known exercise bike (Patent for invention SU 1301419, A63V 23/04 / Authors V. G. Voronin, V. E. Volovik, L. P. Levin and others, publ. 07.04.87). The exercise bike contains a folding X-shaped frame with supporting elements and a mechanism for fixing the position of the pivotally connected frame links relative to each other. On the link of the frame there is a pedal mechanism with connecting rods-pedals fixed on the shaft and a load device. The loading device contains a flywheel fixed on the shaft of the pedal mechanism and made in the form of arcuate cargo elements interacting with the brake band, with a screw means for adjusting its tension.

The disadvantage of the known proposal is that the load unit of this simulator does not allow for a rapid change in the load in different positions of the pedals during the cycle of their rotation.

Also known is a simulator (Patent for invention RU No. 2334535 / Author A.M. Arkhipov, publ. 27.11.2003), containing a load unit, a folding frame with support elements and a mechanism for fixing the position of the pivotally connected frame links relative to each other, mounted on the frame link pedal mechanism with pedals attached to the crankshaft.

The disadvantage of this design, as in the first case, is the inability to control the law of load changes in one cycle of pedaling 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 noted that today highly effective training modes are well known, which involve changing the training load both in the process of performing one movement and during the performance of successive movements of one series. The training expediency of varying the load during one movement is due to the fact that the force developed by a contracting muscle depends on its length in different people, and the “strength-muscle length” relationship for different muscles of one person can vary significantly. Thus, it becomes obvious that the use of a variable load, which changes during the execution of the movement in accordance with the physiological characteristics of the trained muscle group, is more effective for a full-fledged physical training.

The closest analogue to the claimed proposal is a magnetic fluid exercise bike (Patent RU No. 199785 publ. 09/21/2020), containing a load assembly made in a sealed housing, in which a piston with an electromagnetic coil and through channels is located, communicating the under-piston and over-piston cavities, filled magnetorheological fluid, a folding frame with supporting elements and a mechanism for fixing the position of the pivotally connected frame links relative to each other, a pedal mechanism mounted on the frame link with connecting rods-pedals fixed on the crankshaft, while the load unit is configured to be controlled by a personal computer.

As a disadvantage, it should be noted its low efficiency, due to the significant heating of the magnetorheological fluid inside the sealed housing due to the conversion of mechanical energy into thermal energy, as well as the friction of the piston on the inner surface of the sealed housing. This has a negative impact on the resource of the load unit, and also worsens the comfort of performing exercises on the simulator.

The technical result of the proposed proposal is to increase the efficiency of the exercise bike, due to the cooling of the load unit.

The technical result is achieved by installing a heat-insulating casing with holes, inside which a hydraulic turbine with blades is placed, connected by pipelines to the under-piston and above-piston cavities of the sealed housing. Check valves are installed in the through channels of the piston and pipelines.

The proposal is illustrated by drawings.

In FIG. 1 shows the layout of the nodes on the simulator, where 1 is a frame with two supports, 2 is a saddle, 3 is a steering wheel. The links 4, 5, 6 of the frame are connected by a hinge 7. The mechanism for fixing the position of the links 4, 5, 6 of the frame is a closed chain of pivotally connected rods 8 and the links of the frame 4, 6, the slider 9 and the latch 10. On the link 4 of the frame is fixed crankshaft And pedal mechanism with connecting rods-pedals 12. The load unit contains a rod 13 with a piston 14, one end is pivotally mounted on the crankshaft 11, and the other is mounted for movement in a sealed housing 15, pivotally mounted on link 5 of the frame. A heat-insulating casing 16 is installed over the sealed housing 15. The simulator is controlled using a personal computer 17.

In FIG. 2 shows a diagram of the cooled load unit, where 13 is a rod, 15 is a sealed housing of the load unit, in which a piston 14 with an electromagnetic coil 18 connected to a personal computer 17 (Fig. 1), a heat-insulating casing 16 is placed. Piston 14 is made through channels in which check valves 19 are installed, communicating the under-piston 20 and over-piston 21 cavities filled with magnetorheological fluid. Blades 22 are installed in the cavity between the hermetic housing of the load unit 15 and the heat-insulating casing 16, placed on the output shaft of the hydraulic turbine 23. under-piston 20 and over-piston 21 cavities of the sealed housing of the load unit. Sections of pipelines 24 in front of the turbine 23 and behind it 25 are equipped with check valves 26 and 27, respectively.

The use of check valves is due to the need to prevent a change in the direction of the flow of the magnetorheological fluid when the direction of movement of the piston changes.

Holes 28 are made in the lower part of the load unit along the perimeter of the heat-insulating casing 16 to ensure heat removal.

In FIG. 3 shows a load unit (bottom view), where 13 is a rod, 16 is a heat-insulating casing, 28 are holes.

The proposed device works as follows. The subject takes a seat in the saddle 2 of the simulator, the feet are placed on the platforms of the connecting rods-pedals 12, hands on the steering wheel 3. The exercise involves the subject performing pedaling 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 a personal computer 17.

Ensuring a change in the nature and magnitude of the load in different positions of the connecting rods-pedals 12 during the cycle of their rotation is achieved as follows. When pedaling, the rotational movement of the connecting rods-pedals 12 around the axis of the crankshaft 11 is converted into the translational movement of the rod 13 with the piston 14, which move in a sealed housing 15, hinged on the link 5 of the frame. On the piston 14 is placed an electromagnetic coil 18, the control signal to which comes from the personal computer 17, changing its magnetic field. With an increase in the magnetic field by the electromagnetic coil 18, the viscosity of the magnetorheological fluid increases, which fills the internal space of the power load unit. The increased viscosity of the magnetorheological fluid prevents its free flow from the sub-piston cavity 20 to the over-piston cavity 21 (and/or in the opposite direction) through the check valves 19, 26 and 27 installed in the through channels of the piston 14 and pipelines 24 and 25, thus causing an increase in the load in the direction of rotation of the axis of the crankshaft 11.

In turn, in the case when the control signal from the personal computer 17 generates a smaller magnetic field, the viscosity of the magnetorheological fluid naturally decreases, and it moves more freely from the sub-piston cavity 20 to the over-piston cavity 21 (and/or in the opposite direction) through the check valves 19 installed in the through channels of the piston 14 and pipelines 24 and 25 with check valves 26 and 27 installed in them.

The conversion of mechanical energy into thermal energy causes a significant heating of the magnetorheological fluid inside the sealed housing 15, which causes discomfort for the athlete when performing an exercise on the simulator, and increased wear of the parts of the load unit. In order to dissipate excess heat into the environment, blades 22 are installed in the cavity between the sealed housing of the load unit 15 and the heat-insulating casing 16 and the nut is rigidly fixed on the output shaft of the hydraulic turbine 23. The hydraulic turbine 23 is screwed to the bottom using screws (not shown in the figure). sealed housing 15 and pipelines 24 and 25 are connected to the under-piston 20 and over-piston 21 cavities of the load node. Sections of the pipeline 24 before the turbine 23 and behind it 25 are equipped with check valves 26 and 27, respectively.

Cooling of the load node is carried out as follows. Let us separately consider the dynamics of a magnetorheological fluid when the piston moves in different directions.

When the piston moves in the direction of the bottom, the check valves 19 installed in the piston 14 prevent the flow of the magnetorheological fluid from the sub-piston 20 to the over-piston 21 cavity. In this regard, the magnetorheological fluid through the pipeline 24, bypassing the check valve 26, is sent to the hydraulic turbine 23, where the fluid energy is converted into mechanical energy. Thus, the rotation of the output shaft, on which the blades 22 are fixed, is ensured. Further, bypassing the check valve 27, the magnetorheological fluid is drained into the over-piston cavity 21.

The air flow generated by the blades 22 cools the sealed housing 15 and is discharged into the atmosphere through holes 28 located along the perimeter of the heat-insulating casing 16 (see Fig. 2, 3).

When the piston 14 moves in the opposite direction, the check valves 19 installed in the piston 14 do not prevent the flow of the magnetorheological fluid from the over-piston 21 to the under-piston 20 cavity. And check valves 26 and 25, in turn, do not allow the reverse flow of the magnetorheological fluid through pipelines 24 and 25.

Compared with the prototype, the proposed technical solution allows for efficient cooling of the load node.

Claims (3)

1. A magnetic-fluid exercise bike with a cooled load unit, configured to be controlled by a personal computer and containing a load unit, in a sealed housing of which there is a piston with an electromagnetic coil and through channels connecting the under-piston and above-piston cavities filled with magnetorheological fluid, a folding frame with supporting elements and a mechanism for fixing the position of the pivotally connected frame links relative to each other, a pedal mechanism mounted on the frame link with connecting rods-pedals fixed on the crankshaft, characterized in that a heat-insulating casing with holes is installed, inside which a hydraulic turbine with blades is located, connected by pipelines to the under-piston and over-piston sealed cavities. 2. Magnetic fluid exercise bike with a cooled load unit according to claim 1, characterized in that check valves are installed in the through channels of the piston. 3. A magnetic-fluid exercise bike with a cooled load unit according to claim 2, characterized in that check valves are installed in the pipelines connecting the hydraulic turbine with the under-piston and over-piston cavities of the sealed housing.

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