KR101390476B1 - Shock absorber with electric generator - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator-equipped shock absorber in which a generator is incorporated in a shock absorber of an automobile including a cylinder and a piston rod. More particularly, the present invention relates to a shock absorber comprising a cylinder- And a cylindrical armature moving in accordance with the upward and downward movement of the piston rod is disposed between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston rod to generate an electromotive force in accordance with the vertical positional change with the magnet, A ring having an N-pole inner circumferential surface and a ring having an S-pole inner circumferential surface are alternately stacked along the vertical direction, and are fixed to the inner circumferential surface of the cylinder (10). The shock absorber A first magnet (40); A lower end of the piston rod 20 is inserted therein and a lower end thereof is closed. The lower end of the piston rod 20 is depressed when the piston rod 20 is lowered to move downward in the cylinder 10, An armature (30) having electric coils (31) which are arranged along the boundary line between the subdivision planes after being divided into planes on the respective subdivision planes; A first elastic body (60) interposed between a lower end of the armature (30) and an inner bottom surface of the cylinder (10); Respectively.

Description

[0001] SHOCK ABSORBER WITH ELECTRIC GENERATOR [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a generator-equipped shock absorber in which a generator is incorporated in a shock absorber of an automobile including a cylinder and a piston rod. More particularly, the present invention relates to a shock absorber comprising a cylinder- And a cylindrical armature moving in accordance with the upward and downward movement of the piston rod is disposed between the inner circumferential surface of the cylinder and the outer circumferential surface of the piston rod to generate an electromotive force in accordance with the vertical positional change with the magnet, Shock absorbers.

Generally, the suspension system of a car uses a spring and a shock absorber installed between a vehicle body and an axle to mitigate impact or vibration from a road surface while driving, thereby improving driving stability and improving ride comfort.

Here, the shock absorber absorbs the free vibration of the spring due to the impact from the road surface, and stops the vibration. To this end, the shock absorber applies a resistance force to attenuate vibration when the shock absorber is extended and contracted.

Conventionally, in a conventional shock absorber in which a piston rod is caused to reciprocate in a cylinder, resistance is imparted to the reciprocating motion caused by vibration, and it is released as heat. In recent years, however, by using the principle of power generation braking, Techniques have been proposed to use electrical energy in automobiles as well as attenuate vibrations by converting energy into electrical energy.

As related arts related thereto, there have been disclosed in public utility models 20-1998-055226, 10-2011-0094643, and 10-2012-0067476. In the above-mentioned prior arts, Japanese Patent Application Laid-Open No. 10-2011-0094643 has generated linearity by converting the linear motion into rotational motion, but it has been difficult to produce electricity because it requires a complicated structure for converting into rotational motion. In addition, although the above-mentioned public utility models 20-1998-055226 and 10-2012-0067476 produce electricity by using magnets and coils, a piston valve which had to be built in a conventional shock absorber is required The structure can not be simplified and the coil is fixed directly to the cylinder or the piston rod, making it difficult to manufacture.

Also, in the above-mentioned prior arts, the wiring structure of the coil for enhancing the power productivity is not mentioned, and it is also difficult to manufacture a coil suitable for a shock absorber.

Moreover, when electricity is produced by the expansion and contraction of the shock absorber, there is a lot of distortion in the waveform of the electric power, so that there is a restriction on the power loss due to the distortion as well as the use as the power source of the vehicle body.

KR 20-1998-055226 U 1998.10.07. KR 10-2011-0094643 A Aug 24, 2011. KR 10-2012-0067476 A Jun 26,

It is therefore an object of the present invention to provide a generator built-in type shock absorber having a simple structure and a separate coil for incorporating the generator into a shock absorber so that the shock absorber can be easily installed in the basic structure of the shock absorber.

Another object of the present invention is to provide a shock absorber with a built-in generator having a coil mounting structure with enhanced power productivity and making the waveform of electricity to be produced closer to a sinusoidal wave.

According to an aspect of the present invention, And a piston rod (20) which is slidable up and down by inserting a lower portion of the cylinder (10) into the cylinder (10). The shock absorber comprises a ring and an inner circumferential surface having an inner peripheral surface and an outer peripheral surface as magnetic poles, A first magnet (40) having an S pole ring alternately stacked along a vertical direction and fixed to an inner circumferential surface of the cylinder (10); The piston rod 20 has a hollow tube shape in which a lower portion of the piston rod 20 is inserted and a lower end thereof is closed. When the piston rod 20 is lowered, the piston rod 20 moves downward in the cylinder 10, An armature (30) provided on each subdivision surface with an electric coil (31) running around the boundary line between the subdivision surfaces after being divided by the subdivisional surface of the subdivision; A first elastic body (60) interposed between a lower end of the armature (30) and an inner bottom surface of the cylinder (10); And the armature 30 is moved up and down by the upward and downward movement of the piston rod 20 to generate an electromotive force by the interaction between the first magnet 40 and the electric coil 31. [ do.

The small section surface is formed of rhombus, and the electric coil 31 is also wired in a rhombus shape.

The small division plane has any one of a triangular shape, a square shape, and a hexagonal shape, and is characterized in that the electric coil 31 is wired in conformity with the shape of the boundary line of the small division surface.

The height difference between the ring-shaped magnets constituting the first magnet 40 is made smaller than the height difference between the electric coils 31 so that the composite magnetic fluxes generated by the plurality of ring-shaped magnets are linked to each electric coil 31 .

The phase angle of the electric angle between the electric coils 31 with respect to the polarity of the first magnet 40 is 120 ° so that the electric coil 31 outputs three- .

A ring having an N-pole outer circumferential surface and a ring having an S-pole outer circumferential surface are alternately stacked along the vertical direction while being fixed to the outer circumferential surface of the lower portion to be inserted into the cylinder 10 in the piston rod 20, And the armature 30 has an inner diameter for inserting the lower portion of the piston rod 20 provided with the second magnet 50 inwardly with a margin, The first and second magnets 40 and 50 are moved up and down by the piston rod 20 through the second elastic body 70 between the inner bottom surface of the armature 30 and the lower end of the piston rod 20, And an electric power is generated by the interaction between the electric coil (31) and the electric coil (31).

The ring-shaped magnets constituting the first magnet (40) and the respective ring-shaped magnets constituting the second magnet (50) are characterized by the same upper and lower thicknesses.

In the shock absorber having the basic structure of the cylinder and the piston rod as described above, since the armature for installing the electric coil is formed into a cylindrical shape and inserted into the cylinder, the armature can be easily installed, So that the armature can be moved up and down smoothly. Therefore, there is no need for a complicated structure for moving the armature up and down.

Further, according to the present invention, it is possible to distribute the plurality of electric coils uniformly distributed over the entire outer circumferential surface of the armature, while minimizing leakage of the magnetic flux, thereby enhancing the electric production efficiency.

Further, the present invention adopts at least one of a ring-shaped electric coil, a second magnet which is additionally provided in addition to the first magnet, and a ring-shaped multilayer structure of the first magnet or the second magnet to reduce the distortion of the electromotive force waveform, Accordingly, it is possible not only to reduce power loss caused by the distortion of the electromotive force waveform but also to use it without a separate device for reducing the distortion of the waveform.

1 is a sectional view of a generator-equipped shock absorber according to an embodiment of the present invention;
2 is a perspective view of the armature 30 shown in Fig.
FIG. 3 is a plan view of the armature 30 shown in FIG. 2,
FIG. 4 is a perspective view of the first magnet 40 or the second magnet 50 shown in FIG. 1; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a cross-sectional view of a generator-equipped shock absorber according to an embodiment of the present invention.

2 is a perspective view of the armature 30. Fig.

Fig. 3 is a virtual plan view of the armature 30 provided with the electric coil 31 cut on the outer circumferential surface and spreading on a plane.

4 is a perspective view of the first magnet 40 or the second magnet 50 shown in FIG.

1, the generator built-in type shock absorber according to the embodiment of the present invention includes a cylinder 10 and a piston rod 20 in the same manner as a general shock absorber. However, in the conventional cylinder 10, The upper and lower kinetic energy of the piston rod 20 is converted into electric energy to absorb and remove the vertical vibration, instead of employing a method of filling the fluid and forming a valve as a fluid passage at the lower end of the piston rod 20 to absorb and remove the impact. As well as electricity production and utilization.

To this end, the generator built-in type shock absorber according to the present invention includes an armature 30, a first magnet 40, a second magnet 50, a first elastic body 60, and a second elastic body 70, The structure of the cylinder 10 and the piston rod 20 is also deformed.

First, the cylinder 10 and the piston rod 20 will be briefly described.

In general, a shock absorber of an automobile is a device for rapidly attenuating the free vibration of a spring installed to buffer impact or vibration transmitted from the road surface. The piston rod 20 is inserted into the hollow cylinder 10 with sufficient space Thereby causing the piston rod 20 to move up and down and to cause the piston rod 20 to move up and down in response to an impact applied to the piston rod 20, The element is formed in the interior to quickly stop the vertical movement. According to the present invention, a constituent element consuming up-and-down kinetic energy of the piston rod 20 is constituted by a generator including an armature 30, a first magnet 40 and a second magnet 50.

1, the upper and lower parts of the cylinder 10 are closed by the caps 11 and 12 while the upper cap 11 penetrates the piston rod 20 so that the upper part of the piston rod 20 is connected to the cylinder 10 And the rings 21 and 14 are formed at the upper end of the piston rod 20 and the lower end of the lower cap 12 of the cylinder 10 and fixed to the suspension using the rings 21 and 14 . Here, the caps 11 and 12 prevent foreign matter from entering the inside of the cylinder 10, and the rings 21 and 14 may be deformed into a shape other than a ring to fix the suspension.

The cylinder 10 and the piston rod 20 are also provided with a structure for mounting the generator including the armature 30, the first magnet 40 and the second magnet 50, Will be described as follows.

The first magnet 40 is a magnet fixed to the inner circumferential surface of the cylinder 10, and according to the embodiment of the present invention, the N-pole ring and the S-pole ring are alternately arranged in the vertical direction As shown in FIG. Specifically, the first magnet 40 is a magnet formed in a ring shape (a ring shape having an inner diameter of the cylinder as an outer diameter) fittable to the inner circumferential surface of the cylinder 10, The magnets of the N pole and the S pole are alternately laminated alternately on the outer circumferential surface, and the electromotive force is induced by interlinking the coil moving up and down.

Here, 'interlinkage' means that a magnetic force line crosses an electric coil. In other words, a magnetic field is passed through a surface surrounded by an electric coil wired as a closed curve to generate an electromotive force in the electric coil .

The meaning of the N pole and the S pole means a magnetic pole facing inward, that is, a magnetic pole on the inner surface facing in the radial direction. In actual implementation of the ring-shaped first magnet 40, a plurality of arcuate magnets may be provided and the arcuate magnets may be arranged in a circle. At this time, Should have the same stimulus.

The first magnet 40 is preferably provided on the entire inner circumferential surface of the cylinder 10 so that sufficient magnetic force lines are always applied to the coil of the armature 30 to be vertically moved.

The second magnet 50 is a magnet fixed to an outer circumferential surface of a lower portion of the piston rod 20 which is inserted into the cylinder 10 and has an N pole ring and an S pole ring Are alternately stacked along the vertical direction. Here, the meaning of the N pole and the S pole means a magnetic pole of the outer circumferential surface facing outward, and even when actually manufactured, a plurality of arcuate magnets similar to the first magnet 50 are provided, To the outer circumferential surface of the piston rod (20). At this time, it is necessary that the circular-shaped magnets constituting one ring by drawing the same circle have the same stimulus on the outer peripheral surface. A method of fixing the second magnet 50 to the piston rod 20 may employ a method of fixing a magnet to a rotor in a general electric motor or a generator, so a detailed description of the fixed structure will be omitted.

The armature 30 is formed in the shape of a hollow tube having an upper portion opened and a lower portion closed, and a lower portion of the piston rod 20 is inserted therein and the outer circumferential surface is spaced away from the first magnet 40 . The first elastic body 60 is interposed between the bottom surface of the lower closed surface of the armature 30 and the inner bottom surface of the cylinder 10. Accordingly, when the piston rod 20 is lowered downward, the armature 30 is also pressed down in the cylinder 10 to shrink the first elastic body 60, The elastic restoring force is increased and the armature 30 is lifted again when the force in the upward direction is greater than the force in the downward direction. That is, when the piston rod 20 is pushed down, the armature 30 vibrates upward and downward, and of course, the piston rod 20 also vibrates up and down.

An electric coil 31 is installed on the outer circumferential surface of the armature 30 so that the armature 30 interacts with the magnetic force lines of the first magnet 40 even when the armature 30 moves up and down within the cylinder 10, Lt; / RTI > At this time, the electric coil 31 installed in the armature 30 is electrically connected to the external electric terminal 34 through one side of the cylinder 10.

According to an embodiment of the present invention, the armature 30 has an inner diameter for inserting a lower portion of the piston rod 20 having the second magnet 50 in a satisfactory manner, A second elastic body (70) is interposed between the inner bottom surface and the lower end of the piston rod (20). Accordingly, the piston rod 20 moves up and down in the armature 30, so that it interacts (bridges) with the magnetic force lines of the second magnet 50 to generate an electromotive force. That is, the armature 30 allows the piston rod 20 to move up and down within the cylinder 10, and at the same time, it can move up and down inside the cylinder 10, When the impact is applied, relative motion with the first and second magnets 40 and 50 is performed, thereby generating an electromotive force.

According to the embodiment of the present invention, when the electric coil 31 is installed on the outer circumferential surface of the armature 30, the outer circumferential surface of the armature 30 is divided into small-section surfaces of the same shape, One for each side. At this time, the electric coils 31 provided on the respective subdivision surfaces are composed of wirings running along the boundary line between the subdivision surfaces. Here, the wiring may be formed by, for example, forming a groove along a boundary line and inserting the electric coil 31 into the groove. As a result, an electromotive force is generated in the electric coil 31 in accordance with a change in the magnetic force passing through the small section surrounded by the electric coil 31. [

According to the embodiment of the present invention, as shown in FIGS. 2 and 3, the rims of the subdivision surfaces are formed in a rhombic shape, so that the electric coils 31 are also roughened to form adjacent electric coils 31 And the portions corresponding to sides of the rhombus are brought close to each other. Accordingly, the outer circumferential surface of the armature 30 can minimize the surface that is not surrounded by the electric coil 31 (the surface on which a magnetic force can be leaked without generating an organic electromotive force) The electromotive force can be obtained by making maximum use of the outer circumferential surface.

In the meantime, according to the embodiment of the present invention, the subdivision surfaces partitioned for the wiring of the electric coil 31 may be polygonal shapes of various shapes in addition to the rhombic shape described above. However, (In this case, a rectangle formed by a horizontal line and a vertical line), rhombus, and hexagon. More preferred is a rhombus shape. Here, the polygon means a shape when the outer peripheral surface of the armature 30 is virtually spread on a plane. Of course, regardless of which polygon is adopted, it is preferable that the electric coils 31 are made the same to generate an electromotive force of the same magnitude.

More preferably, as shown in FIG. 2, the magnets of the first and second magnets 40 and 50, that is, the magnets of the N poles And the thickness of the ring and the S-pole ring. In other words, the upper and lower thicknesses of the ring-shaped magnets constituting the first magnet 40 and the second magnet 50 (or the difference in height between the ring-shaped magnets stacked one above the other) So that the lines of magnetic force generated by the plurality of adjacent ring-shaped magnets can be simultaneously linked with one electric coil. Accordingly, the change in the flux linkage due to the relative up and down movement between the electric coil and the first and second magnets 40 and 50 also changes gradually without changing abruptly, so that the waveform of the organic electromotive force can be made close to the sinusoidal wave.

A plurality of electric coils 31 provided on the outer circumferential surface of the armature 30 are connected in three phases to output three-phase electromotive force through the electric terminal 34. [ More specifically, the electrical angles of the electric coils 31 arranged in the vertical direction have an electrical angle of 120 ° between the electrical coils which are mutually electrified, It is possible to have an electric angle of 120 ° in consideration of the N and S intervals of the two magnets 40 and 50.

For example, when six electric coils 31 are installed in the upper and lower portions as shown in the figure, if N poles are respectively disposed at the centers of the first and fourth electric coils in the upper portion (as in the embodiment of the present invention, Of the N-poles and the S-poles of the ring in the manner that the S-poles are disposed between the two N-poles, when the N-poles are applied to the electric coils by the synthetic stimulation of the ring-shaped magnets when the ring- .

As a result, three electric coils connected in the vertical direction generate an electromotive force having a phase difference of 120 DEG with respect to each other. Since three-phase electromotive force occurs in the remaining three of the same vertical lines, three phases of the upper and three phases may be connected in series or in parallel at the same phase. Of course, the waveform of the three-phase electromotive force can be made close to the sinusoidal wave by being connected in series or in parallel with the electric coils on other vertical lines.

As shown in the drawing, the first elastic body 60 and the second elastic body 70 are constituted by compression springs having an elastic restoring force resistant to the force to be compressed according to the embodiment of the present invention, Is satisfied. Since the first elastic body 60 and the second elastic body 70 should not fall down during shrinkage and relaxation, the first elastic body 60 and the second elastic body 70 may be formed of Extrapolated projections 32 and 33 are respectively formed on the upper and lower sides of the lower closed surface of the armature 30 and grooves 13 and 22 for inserting the first and second elastic bodies 60 and 70 The bottom surface of the piston rod 20 and the inner bottom surface of the cylinder 10, respectively.

1, the armature 30 is elastically supported by the first elastic body 60 and moves up and down. Therefore, when the armature 30 is tilted and contacts the first magnet 40 or the second magnet 50 It can cause friction. Therefore, it is preferable that the armature 30 is not inclined at the time of up-and-down movement. For example, two sleeves that are slid smoothly even when in contact with the first magnet 40 and have small contact resistance are provided and extrapolated one above the other on the outer peripheral surface of the armature 30, respectively.

Since the first elastic body 60 and the second elastic body 70 are provided as described above, when the piston rod 20 is pushed downward, the second elastic body 70 is contracted and the armature 30 is also pressed against the first elastic body 60 ) And move downward. Therefore, the electric coil installed in the armature 30 causes a relative positional change with respect to the first magnet 40, so that electromotive force is generated by the flux by the first magnet 40, and the electromotive force is generated between the second magnet 50 An electromotive force is generated due to the flux linkage caused by the second magnet 50 due to the relative positional change. The generated electromotive force is an electromotive force generated by linking the magnetic flux of the first magnet 40 and the magnetic flux of the second magnet 50 to the magnetic flux of the second magnet 50. By this electromotive force, .

Even when the first elastic body 60 and the second elastic body 70 are elongated, an electromotive force is generated due to the relative positional change between the first magnet 40 and the second magnet 50 and the electric coil, .

Therefore, when the piston rod 20 moves up and down due to the impact, it is subjected to resistance, and the vertical vibration rapidly disappears.

Since the relative positions of the second magnet 50 and the first magnet 40 are also changed in accordance with the upward and downward movement of the piston rod 20, 30 is different from the case where only the first magnet 40 has a magnetic flux linking with the electric coil 31 of the first magnet 30.

For example, it is assumed that the elastic property curve of the first elastic body 60 and the second elastic body 70 is the same product.

First, before the impact is applied to the piston rod 20, if the inner circumferential surface magnetic pole of the first magnet 40 and the outer circumferential surface magnetic pole of the second magnet 50 on the horizontal plane have different polarities as shown in FIG. 1, And the flux linkage with the electric coil 31 becomes large.

On the other hand, when the piston rod 20 is lowered due to the impact, and the positional change occurs in the direction in which the inner peripheral surface magnetic pole of the first magnet 40 and the outer peripheral surface magnetic pole of the second magnet 50 have the same polarity, The line of magnetic force originating from the N pole of the second magnet 40 also extends to the S pole of the adjacent first magnet 40 but the magnetic force lines formed obliquely to the S pole of the second magnet 50 also go horizontally. When the magnetic poles of the inner circumferential surface of the first magnet 40 and the outer circumferential surface of the second magnet 50 have the same polarity, the magnetic force lines from the first magnet 40 toward the second magnet 50 are very weak do.

When the magnetic poles of the inner circumferential surface of the first magnet 40 and the outer circumferential surface of the second magnet 50 face each other on a horizontal plane with different polarities from each other, the magnetic flux linking the electric coils 31 of the armature 30 And appear to be the smallest when they face each other horizontally with the same polarity. Therefore, the magnetic flux linked to the electric coil 31 of the armature 30 has periodicity according to the falling distance in the process of lowering the armature 30, and the polarity is changed.

Generally, if the second magnet 50 is not provided and the first magnet 40 alone forms a flux linkage, the magnetic flux linking to the electric coil 31 of the lowering armature 30 becomes close to a rectangular wave. That is, the magnetic flux distribution abruptly changes between the N pole and the S pole, and has a slightly curved but almost uniform value in the other region (the region near the center of the N pole or the S pole). This distribution of magnetic flux accelerates the waveform of the electromotive force. According to the embodiment of the present invention, by additionally providing the second magnet 50, the magnetic flux gradually changes from the point of maximum magnetic flux to the point at which the magnetic flux is interrupted Therefore, by making the distribution of the magnetic fluxes closer to the sine wave closer to the sine wave, the waveform of the electromotive force induced in the electric coil can be made closer to the sinusoidal wave. Of course, the armature reaction by the current flowing in the electric coil can improve the waveform of the electromotive force by employing, for example, a method of adding a complement, as in the prior art.

It is preferable that the ring-shaped magnets constituting the first magnet 40 and the ring-shaped magnets constituting the second magnet 50 have the same upper and lower thicknesses. This is because a plurality of electric coils are installed in the armature 30, and the period of electromotive force induced in each electric coil is the same.

The generator built-in type shock absorber according to the present invention constructed as described above is provided with a first magnet 40 such that N-poles and S-poles are alternately stacked on ring-shaped magnets on the inner circumferential surface of the cylinder 10, 31 are provided on the outer circumferential surface of the armature 30 with minimal gaps, so that an electromotive force is produced over the entire upper and lower movement sections of the armature 30. As a result, the leakage flux can be minimized and the amount of power produced can be increased.

Further, according to the embodiment of the present invention, since the wiring of the electric coil 31 is in the form of rhombus, the flux gangster does not change drastically. Thus, the waveform of the electromotive force can be improved.

According to an embodiment of the present invention, the second magnet 50 having the same shape as that of the first magnet 40 is mounted on the piston rod 20 and moves up and down within the armature 30, The first magnet (40) and the second magnet (50) are made larger to increase the power production amount, and the distribution in the rotor is made closer to the sinusoidal wave to improve the waveform of the electromotive force.

Further, according to the embodiment of the present invention, the height difference between the ring-shaped magnets is smaller than the height difference between the electric coils, so that the composite magnetic flux by the plurality of ring-shaped magnetic fluxes is linked to each electric coil, Makes the waveform better.

Here, improving the waveform of the electromotive force minimizes the power loss due to the distortion of the waveform, and therefore has the advantage of enhancing the power generation direction while attaining the intrinsic purpose of attenuating the up-and-down vibration of the piston rod as a shock absorber.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, . ≪ / RTI > Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

10: cylinder 11, 12: cap 13: groove
14: Ring
20: piston rod 21: collar 22: groove
30: armature 31: electric coil 32, 33: projection
34: Electrical terminal
40: first magnet 50: second magnet
60: first elastic body 70: second elastic body

Claims (7)

delete A cylinder 10; And a piston rod (20) slidable up and down by inserting a lower portion of the cylinder (10) in the cylinder (10) with sufficient space, the shock absorber comprising:
A first magnet (40) having an inner circumferential surface and an outer circumferential surface as magnetic poles, the ring having an inner circumferential surface having an N pole and the S pole ring having an inner circumferential surface alternately stacked along a vertical direction and fixed to an inner circumferential surface of the cylinder (10);
The piston rod 20 has a hollow tube shape in which a lower portion of the piston rod 20 is inserted and a lower end thereof is closed. When the piston rod 20 is lowered, the piston rod 20 moves downward in the cylinder 10, An armature (30) provided on each subdivision surface with an electric coil (31) running around the boundary line between the subdivision surfaces after being divided by the subdivisional surface of the subdivision;
A first elastic body (60) interposed between a lower end of the armature (30) and an inner bottom surface of the cylinder (10);
So that the armature 30 is moved up and down by the upward and downward movement of the piston rod 20 to generate an electromotive force by the interaction between the first magnet 40 and the electric coil 31,
Wherein the small section surface is made of diamond and the electric coil (31) is also wired in a rhombus shape. 3. The method of claim 2,
Wherein the small section surface is formed in any one of a triangular shape, a square shape, and a hexagonal shape, and the electric coil (31) is wired in conformity with the shape of the boundary line of the small section surface. 3. The method of claim 2,
The height difference between the ring-shaped magnets constituting the first magnet 40 is made smaller than the height difference between the electric coils 31 so that the composite magnetic fluxes generated by the plurality of ring-shaped magnets are linked to each electric coil 31 Features a built-in generator-type shock absorber. 5. The method of claim 4,
The phase angle of the electric angle between the electric coils 31 with respect to the polarity of the first magnet 40 is 120 ° so that the electric coil 31 outputs three- Features a built-in generator-type shock absorber. The method according to any one of claims 2 to 4,
A ring having an N-pole outer circumferential surface and a ring having an S-pole outer circumferential surface are alternately stacked along the vertical direction while being fixed to the outer circumferential surface of the lower portion to be inserted into the cylinder 10 in the piston rod 20, And a second magnet 50,
The armature 30 has an inner diameter to allow the lower portion of the piston rod 20 provided with the second magnet 50 to be inserted in a satisfactory manner. The inner bottom surface of the armature 30 and the piston rod 20 via the second elastic body 70,
Wherein the first and second magnets (40, 50) and the electric coil (31) generate an electromotive force by a vertical movement of the piston rod (20). The method according to claim 6,
Wherein each of the ring-shaped magnets constituting the first magnet (40) and each of the ring-shaped magnets constituting the second magnet (50) have the same upper and lower thicknesses.

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