CN101091683A - Electromagnetic wobbler - Google Patents

Abstract

The present invention relates to an electromagnetic swinging machine. It includes the following several portions: machine frame, linear magnetic drive mechanism, electromagnets, carriage, and permanent magnet, linear guideway, swinging footrest and reset spring. Said invention also provides the connection mode of all the above-mentioned portions, and also provides the working principle of said swinging machine and its operation method.

Description

Electromagnetic wobbler

Technical field

The present invention relates to health and fitness facilities, a kind of human body that makes of more specifically saying so allows extremity simulate the wiggly health and fitness facilities of Fish under lying status.

Background technology

Wobbler is that a kind of human body that makes allows extremity simulate the wiggly exercising apparatus of Fish under lying status.Present wobbler all is to adopt the slider-crank mechanism of motor as power source, and its version as shown in Figure 1.During machine operation, with motor reducer rotating shaft 1 (rotational frequency f ₀=2.33 ± 0.08Hz) cranks that are fixed together 2 can rotate around motor shaft, the other end of crank 2 is then done moving up and down with respect to chute 3 in chute 3, at this moment crank 2 just produces the pushing away of a left and right directions reciprocation cycle, pulling force to chute 3, makes slide plate 4 drive footstools 5 and moves back and forth along guide rail about 6.The wobbler of this slider-crank mechanism exists bigger shortcoming:

1, crank 2 during two dead-centre positions, reversing impact power can occur inevitably about turning to, thereby produces impact noise;

2, between crank 3 and the chute 4, all exist bigger sliding friction between slide plate 4 and the guide rail 6, thus produce frictional noise;

3, footstool 5 can resonate under the effect of impulsive force and frictional force, thereby the low frequency of generation footstool 5 " drone " sound.

4, this mechanism is the mechanical energy that electric energy is converted to rotation by motor, be converted to the mechanical energy of slide block left and right sides translation again by decelerator and slider-crank mechanism, all will consume part energy in each transmission link, so efficient is relatively low, energy consumption is relatively large.

Summary of the invention:

The present invention is the electromagnetic wobbler of avoiding above-mentioned existing in prior technology weak point, provide a kind of operating steadily, noise is low, energy loss is little.

The construction features of electromagnetic wobbler of the present invention is that straight line magnetically-actuated mechanism is set, be that electric magnet is set respectively on the symmetric position of machine frame at two sides, the both sides electric magnet has alternation and opposite each other electromagnetism polarity, on the carriage between the electric magnet of both sides, fixedly installing permanent magnet, waving footstool is fixedly installed on the movable stand by carriage, movable stand can move back and forth along the line slideway that is fixed between the machine frame at two sides, between machine frame at two sides and movable stand back-moving spring is set.

Construction features of the present invention also is:

Cooperate for rolling between described movable stand and the line slideway.

The exciting current of described electric magnet is to be taken place and the frequency of amplifying unit generation and the wobble frequency f of wobbler by signal ₀Consistent sinusoidal signal.

Described signal take place with amplifying unit in, be that the electric magnet of L and capacitor that capacitance is C constitute series resonant circuit with the inductance value, following formula is satisfied in being provided with of its circuit parameter:

$f_0=\frac{1}{2\mathrm{\π}\sqrt{\mathrm{LC}}}=2.33\±0.08\left(\mathrm{Hz}\right)$

The rigidity that described every side back-moving spring is set is k/2, setting by movable stand, carriage, wave footstool and wiggler's body lower limb are M in the interior gross mass of waving body, by described back-moving spring with wave the change frequency that resonant frequency in the single-degree-of-freedom " spring---quality system " that body constitutes equals pumping signal:

$f_0=\frac{1}{2\mathrm{\π}}\sqrt{\frac{k}{M}}=2.33\±0.08\left(\mathrm{Hz}\right)$

Compared with the prior art, beneficial effect of the present invention is embodied in:

1, the electromagnetic theory that the present invention utilizes the same sex to repel each other and there is a natural attraction between the sexes makes the driving of movable stand in the electromagnetic force that is moved back and forth with electromagnetic mechanism on the rectilinear direction of line slideway, thereby forms the swing of waving footstool, reliable in action.

2, the present invention adopts Electromagnetic Drive, directly convert electrical energy into the mechanical energy of movable stand left and right sides translation, the sliding friction that intermediate link is few, the nothing power consumption is bigger, and electromagnetic excitation system and motor system all are to be operated in resonant condition, therefore, the noise that produces during system works is all relative with the energy of consumption less, has advantages of energy saving and environmental protection.

3, the present invention is simple in structure, easy to implement.

Description of drawings:

Fig. 1 is the prior art structural representation.

Label among Fig. 1: 1 motor reducer rotating shaft, 2 cranks, 3 chutes, 4 slide plates, 5 footstools, 6 guide rails.

Fig. 2 is a structural representation of the present invention.

Fig. 3 is another working state schematic representation of the present invention.

Label among Fig. 2, Fig. 3: 1 line slideway, 2 waves footstool, 3 carriages, 4 movable stands, 5 permanent magnets, 6 electric magnet, 7 frames, 8 back-moving springs.

Below by the specific embodiment, the invention will be further described in conjunction with the accompanying drawings:

The specific embodiment:

Referring to Fig. 1, the opposite each other electric magnet of electromagnetism polarity 6 is set respectively on machine frame at two sides 7 symmetric positions, fixedly install permanent magnet 5 on the carriage 3 between the both sides electric magnet 6, carriage 3, wave footstool 5 and movable stand 4 and be fixed together and can move along the line slideway 1 that is fixed between the machine frame at two sides, back-moving spring 8 is arranged between machine frame at two sides 7 and the carriage 3.When the alternating polarity conversion of both sides electric magnet 6, can produce the alternating electromagnetic force effects to the permanent magnet on the carriage 35, the movable stand 4 that is fixed together with permanent magnet 5 is driven wave footstool 2 to move back and forth along line slideway 1.

In concrete the enforcement, between movable stand 4 and line slideway 1, adopt rolling to cooperate, to reduce frictional resistance.

Fig. 2, shown in Figure 3, the exciting current that electric magnet 6 is set is taken place to provide with amplifying unit by signal, and the frequency of exciting current and instantaneous polarity are controlled by the sinusoidal signal that signal takes place to send with amplifying unit, and the sinusoidal signal change frequency is wobble frequency f ₀, its work process is as follows:

At the positive half cycle of sinusoidal signal, A end for+, the B end for-.At this moment, the magnetic polarity of electric magnet as shown in Figure 2, the electric magnet in left side produces left suction to movable stand 4, and the thrust that the electric magnet on right side produces left movable stand 4, under the combined effect of these two power, movable stand 4 waves footstool 2 by carriage 3 drives and swings left.

At the negative half period of sinusoidal signal, A end for-, the B end for+.At this moment, the magnetic polarity of electric magnet as shown in Figure 3,6 pairs of movable stands of the electric magnet in left side 4 produce thrust to the right, and the suction that 6 pairs of movable stands of the electric magnet on right side 4 produce to the right, under the combined effect of these two power, movable stand 4 drives and waves footstool 2 and move right.

In the present embodiment, exciting current adopts sinusoidal signal can effectively avoid movable stand to produce bigger commutation acceleration when commutation, make movable stand about change in displacement and velocity variations during two extreme positions all be minimum, the just acceleration of this position and impulsive force minimum.

In concrete the enforcement, the inductance value L of electric magnet and the capacitance C of capacitor should be set rationally, make the resonant frequency of the series resonant circuit that constitutes by LC equal the wobble frequency of wobbler:

$f_0=\frac{1}{2\mathrm{\π}\sqrt{\mathrm{LC}}}=2.33\±0.08\left(\mathrm{Hz}\right)$

This moment, the driving energy of drive circuit was minimum.

If the global stiffness of back-moving spring is k, and establish by movable stand, carriage, wave footstool and human body lower limbs is M in the interior gross mass of waving body, make by back-moving spring and the resonant frequency of waving the single-degree-of-freedom " spring---quality system " that body constitutes also equals the wobble frequency of wobbler:

$f_0=\frac{1}{2\mathrm{\π}}\sqrt{\frac{k}{M}}=2.33\±0.08\left(\mathrm{Hz}\right)$

Like this, wave body and also be in resonant condition, wave body needed excitation energy minimum when vacillating now to the left, now to the right, therefore also can reduce the driving energy of electric magnet greatly.

Claims (5)

1, electromagnetic wobbler, it is characterized in that being provided with straight line magnetically-actuated mechanism, be that electric magnet (6) is set respectively on the symmetric position of machine frame at two sides (7), both sides electric magnet (6) has alternation, and opposite each other electromagnetism polarity, on the carriage between the electric magnet of both sides (3), fixedly installing permanent magnet (5), waving footstool (2) is fixedly installed on the movable stand (4) by carriage (3), movable stand (4) can move back and forth along the line slideway (1) that is fixed between the machine frame at two sides, between machine frame at two sides (7) and movable stand (4) back-moving spring (8) is set.

2, electromagnetic wobbler according to claim 1 is characterized in that cooperating for rolling between described movable stand (4) and the line slideway (1).

3, electromagnetic wobbler according to claim 1, the exciting current that it is characterized in that described electric magnet (6) are to be taken place and the frequency of amplifying unit generation and the wobble frequency f of wobbler by signal ₀Consistent sinusoidal signal.

4, electromagnetic wobbler according to claim 3, it is characterized in that described signal take place with amplifying unit in, be that the electric magnet of L and capacitor that capacitance is C constitute series resonant circuit with the inductance value, following formula is satisfied in being provided with of its circuit parameter:

$f_0=\frac{1}{2\mathrm{\π}\sqrt{\mathrm{LC}}}=2.33\±0.08\left(\mathrm{Hz}\right).$

5, electromagnetic wobbler according to claim 4, the rigidity that it is characterized in that being provided with described every side back-moving spring (8) is k/2, setting by movable stand (4), carriage (3), wave footstool (2) and wiggler's body lower limb are M in the interior gross mass of waving body, by described back-moving spring with wave the change frequency that resonant frequency in the single-degree-of-freedom " spring---quality system " that body constitutes equals pumping signal:

$f_0=\frac{1}{2\mathrm{\π}}\sqrt{\frac{k}{M}}=2.33\±0.08\left(\mathrm{Hz}\right).$

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