KR102539318B1 - Hydraulic damper having energy harvestin - Google Patents

Abstract

A hydraulic damper having an energy harvesting function according to the present invention includes a damper cylinder in which a buffer space for storing fluid is formed at the bottom and an energy conversion space is formed at the top, a piston rod disposed through upper and lower portions of the damper cylinder, and a piston rod coupled to, a piston disposed in the buffer space and the energy conversion space of the damper cylinder, a blade disposed on one side of the piston disposed in the buffer space, a magnetic body disposed on one side of the piston disposed in the energy conversion space, and energy conversion It includes an induction coil disposed in space.
The hydraulic damper having an energy harvesting function according to the present invention has an effect of converting flow resistance in the damper into rotational energy and generating electricity by rotating a magnetic body using the rotational energy.

Description

Hydraulic damper with energy harvesting function {HYDRAULIC DAMPER HAVING ENERGY HARVESTIN}

The present invention relates to a hydraulic damper having an energy harvesting function, and more particularly, to a hydraulic damper that rotates a blade using the flow of fluid generated in the damper and harvests energy from the rotational motion of the rotated blade. will be.

The vehicle's suspension system performs various functions such as securing the stability of vehicle steering, providing a comfortable ride, maintaining the proper height of the vehicle, mitigating shock, maintaining wheel alignment, supporting the weight of the vehicle, and maintaining the ground condition of the tires.

Among suspension devices, a strut-type suspension device including a damper occupies a small space and has good grip. In addition, since the structure is simple, the manufacturing cost is low, and it is widely used in passenger vehicles.

The damper is configured so that the piston rod to which the valve plate is coupled moves up and down in a cylinder case in which fluid (oil or air) is sealed. The flow resistance of the fluid generated while the piston makes a linear motion in a relatively longitudinal direction within the cylinder case damps the impact applied to the vehicle. These dampers continuously operate according to the condition of the road surface and driving conditions of the vehicle, and the flow resistance of the fluid generated at this time is mostly dissipated as thermal energy.

The present invention is to generate electricity using the flow resistance of the fluid, converting the flow resistance of the fluid into rotational energy, and generating electricity using the converted rotational energy to convert it into storable energy.

Republic of Korea Patent Publication No. 10-2007-0096398 (published on 2007.10.02)

The hydraulic damper having an energy harvesting function according to the present invention is intended to convert the flow resistance in the damper into rotational energy and convert the rotational energy into storable electrical energy.

In addition, the hydraulic damper having an energy harvesting function according to the present invention prevents the rotation of the piston rod when converting the rotational energy of the flow resistance to increase the durability of other components coupled with the piston rod.

In addition, the hydraulic damper having an energy harvesting function according to the present invention can generate electrical energy only when rotation in one direction occurs when electrical energy is converted using flow resistance, so that electrical energy can be used stably. want to make it

A hydraulic damper having an energy harvesting function according to the present invention includes a damper cylinder in which a buffer space for storing fluid is formed at the bottom and an energy conversion space 120 is formed at the top, and a piston rod disposed through the top and bottom of the damper cylinder. , A piston coupled to the piston rod and disposed in the buffer space and the energy conversion space of the damper cylinder, a blade disposed on one side of the piston disposed in the buffer space, and a magnetic body disposed on one side of the piston disposed in the energy conversion space , and includes an induction coil disposed in the energy conversion space.

The blade of the hydraulic damper having an energy harvesting function according to the present invention is in contact with the fluid, and when the piston rod moves, the piston rotates around the piston rod by the flow resistance between the fluid and the blade, and the induction coil is attached to the piston Electrical energy is generated by the coupled magnetic material.

The piston of the hydraulic damper having an energy harvesting function according to the present invention is a cylindrical piston hub having blades disposed on the outer surface at the bottom and an extension cylinder extending from the upper end of the piston hub and having a diameter smaller than that of the piston hub. A magnetic material is disposed on the outer surface of the extension cylinder, and a partition wall having a through hole through which the extension cylinder is disposed is disposed inside the damper cylinder to partition a buffer space and an energy conversion space.

Bearings are disposed between the inner surface of the piston hub and the outer surface of the piston rod of the hydraulic damper having an energy harvesting function according to the present invention, between the inner surface of the extension cylinder and the outer surface of the piston rod, and at the lower end of the piston hub and the upper end of the extension cylinder A fixture for limiting movement of the piston in the vertical direction on the piston rod is coupled to the corresponding piston rod.

The extension cylinder of the hydraulic damper having an energy harvesting function according to the present invention is formed with a stepped portion whose diameter decreases from the center to the top, and a magnetic hub coupled to the outer surface of the stepped portion is rotatably coupled to the magnetic body. Between the hub and the stepped portion, when the stepped portion rotates in one direction, a ratchet gear portion for rotating the magnetic hub is disposed.

The ratchet gear part of the hydraulic damper having an energy harvesting function according to the present invention is coupled to a first gear housing coupled to the stepped portion, a rotation regulating rod having one side rotatably coupled to the gear housing, and an inner side of the magnetic hub, and a second gear housing having an internal gear having an asymmetrical inclination formed on an inner surface thereof.

The hydraulic damper having an energy harvesting function according to the present invention has an effect of converting flow resistance in the damper into rotational energy and generating electricity by rotating a magnetic body using the rotational energy.

In addition, the hydraulic damper having an energy harvesting function according to the present invention is composed of a piston that rotates and moves up and down by flow resistance and a piston rod that moves in synchronization with the piston through the piston and moves only up and down, and is coupled to the piston rod There is an effect of increasing the durability of the entire device by preventing twisting of other components.

In addition, when the hydraulic damper having an energy harvesting function according to the present invention rotates the piston using the flow resistance, the conversion to electrical energy occurs only when rotating in one direction, so that the electrical energy can be stably used. there is

1 is a cross-sectional view of a hydraulic damper having an energy harvesting function according to an embodiment of the present invention.
Figure 2 is a cross-sectional view of main parts of the piston rod and piston shown in Figure 1;
3 is a cross-sectional view of a main part of a hydraulic damper having an energy harvesting function according to another embodiment of the present invention.
4 is a cross-sectional plan view showing the magnetic body and the ratchet gear shown in FIG.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only, and may be modified and implemented in various forms. Therefore, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Although terms such as first or second may be used to describe various components, such terms should only be construed for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle.

Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate that the described feature, number, step, operation, component, part, or combination thereof exists, but one or more other features or numbers, It should be understood that the presence or addition of steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this specification, it should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, a hydraulic damper having an energy harvesting function according to the present invention will be described in detail with reference to the drawings.

1 is a cross-sectional view of a hydraulic damper having an energy harvesting function according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of main parts of a piston rod and a piston shown in FIG.

Referring to Figure 1, a hydraulic damper having an energy harvesting function according to an embodiment of the present invention is composed of a damper cylinder 100, a piston rod 200 and a piston 300, the piston 300 includes a piston rod It consists of a blade 311 generating rotational energy when the 200 moves up and down, a magnetic body 322 and an induction coil 122 converting the rotational energy into electrical energy.

The damper cylinder 100 is a space in which a piston rod, a piston 300, etc. are accommodated, and as shown in FIG. 1, a buffer space 110 in which fluid 112 is stored is formed at the bottom, and an energy conversion space at the top ( 120) is formed.

In such a damper cylinder 100, a piston rod 200, the upper and lower portions of which are coupled to a device requiring buffering, is disposed penetrating the upper and lower parts of the damper cylinder 100, and the damper cylinder 100 ) When the piston 300 disposed in the buffer space 110 and the energy conversion space 120 are combined to move the piston rod 200 up and down, the piston 300 moves up and down along the piston rod 200 do.

At this time, a blade 311 is disposed below the piston 300 disposed in the buffer space 110 so as to come into contact with the fluid 112 stored in the buffer space 110, and disposed in the energy conversion space 120. A magnetic material 322 is disposed on the top of the piston 300, and an induction coil 122 is disposed on the inner surface of the damper cylinder 100 forming the energy conversion space 120.

Therefore, when the piston rod 200 moves up and down, flow resistance is generated between the fluid 112 and the blade 312, and the piston 300 rotates around the piston rod 200 due to this flow resistance, , it moves up and down. When the piston 300 rotates around the piston rod 200, the magnetic body 322 coupled to the piston 300 moves to generate induction electricity in the induction coil.

Looking at the piston 300 in more detail with reference to FIG. 2 is as follows.

The piston 300 includes a cylindrical piston hub 310 in which a blade 312 is disposed on an outer surface of the lower part, and an extension extending from an upper end of the piston hub 310 and having a diameter smaller than that of the piston hub 310. Consists of a cylinder 320, the magnetic body 322 is disposed on the outer surface of the extension cylinder (320).

Inside the damper cylinder 100, a partition wall 130 having a through hole is disposed so that the extension cylinder 320 can be disposed therethrough, and divides the buffer space 110 and the energy conversion space 120 so that the buffer space 110 It prevents the fluid 112 stored in from flowing into the energy conversion space 120.

At this time, between the inner surface of the piston hub 310 and the outer surface of the piston rod 200, between the inner surface of the extension cylinder 320 and the outer surface of the piston rod 200, the piston rod 300 can rotate more smoothly. A bearing 210 is disposed to reduce friction between the 200 and the piston 300. Although ball bearings are used in this embodiment, it is not limited to these bearings, and various bearings may be used.

In addition, the piston rod 200 at the upper and lower ends of the piston 300, that is, the piston rod 200 corresponding to the lower end of the piston hub 310 and the upper end of the extension cylinder 320, the piston on the piston rod 200 ( The fixture 220 for limiting the vertical movement of the 300 is coupled. Accordingly, the piston 300 moves up and down along the piston rod 200 and can rotate around the piston rod 200 .

The fixture 220 used in this embodiment is a snap ring, but the snap ring is an embodiment for one fixture, and the piston 300 and the piston rod 200 move up and down simultaneously, and the piston rod 200 is the center. As such, any fixture in which the piston 300 can rotate may be used.

In the case of the embodiment described above, the piston 300 may rotate in a forward or reverse direction according to the moving direction of the piston rod 200 . In this case, induction coil 122 may generate induced electricity having a different phase according to the direction of rotation of piston 300, and such induced electricity may be generated aperiodically according to the direction of force applied to piston rod 200. can Therefore, in order to stably use such induction electricity, a separate and complicated device must be added. Therefore, it is more preferable to generate induced electricity only when the piston 300 rotates in one direction.

3 is a cross-sectional view of a main part of a hydraulic damper having an energy harvesting function according to another embodiment of the present invention, and FIG. 4 is a planar cross-sectional view showing a magnetic body and a ratchet gear shown in FIG. 1, in which the piston 300 moves in one direction This is an embodiment of a hydraulic damper having an energy harvesting function that generates induction electricity by rotating the magnetic body 322 only when it rotates.

3 and 4, in order to rotate the magnetic body 322 only when the piston 300 rotates in one direction, the extension cylinder 320 has a stepped portion 320a whose diameter decreases from the center to the top. And, to the stepped portion 320a, a magnetic hub 330 to which a magnetic substance 322 is coupled to the outer surface is rotatably coupled, and between the magnetic hub 330 and the stepped portion 320a, the stepped portion 320a is on one side. When rotating in the direction, the ratchet gear unit 400 for rotating the magnetic hub 330 may be disposed.

That is, unlike the above-described embodiment, a magnetic hub 330 that rotates around the extension cylinder 320 is additionally configured on the extension cylinder 320, and the magnetic hub 330 and the extension cylinder 320 are interposed in one direction. Arrange the ratchet gear part 400 that rotates only when rotating as.

However, when the magnetic hub 330 is additionally configured, a stepped portion 320a having a reduced diameter is formed in the extension cylinder 320, and the magnetic hub 330 is inserted into the stepped portion 320a. Due to the magnetic hub 330, the overall size is prevented from increasing.

At this time, a bearing reducing friction may be disposed between the magnetic hub 330 and the stepped portion 320a as shown in FIG. 3 .

Referring to FIG. 4, the ratchet gear unit 400 includes a first gear housing 410 coupled to the stepped portion 320a, a rotation regulating rod 420 having one side rotatably coupled to the gear housing 410, and a magnetic hub It is composed of a second gear housing 430 coupled to the inside of 330 and having an internal gear 432 having an asymmetrical inclination formed on the inner surface.

Here, the internal gear 432 is composed of a first inclined surface 432a with a steep slope and a second inclined surface 432b with a gentle slope, as shown in the enlarged view of FIG. In the case of rotation, the end of the rotation regulating rod 420 is hooked on the first inclined surface 432a of the internal gear 432 and rotates the first gear housing 430 counterclockwise in the same direction as the stepped portion 320a to induce induction. When electricity is generated and the stepped portion 320a rotates clockwise, the end of the rotation regulating rod 420 moves along the second inclined surface 432b, causing the second gear housing 430 and the magnetic hub 330 to move. will not rotate.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

100: damper cylinder 110: buffer space
112: fluid 120: energy conversion space
122: induction coil 130: bulkhead
200: piston rod 210: bearing
220: fixture 300: piston
310: piston hub 312: blade
320: extension cylinder 320a: stepped portion
322: magnetic body 330: magnetic body hub
400: ratchet gear unit 410: first gear housing
420: rotation regulating rod 430: second gear housing
432: take off gear

Claims (5)

A damper cylinder in which a buffer space for storing fluid is formed at the bottom and an energy conversion space is formed at the top;
a piston rod disposed penetrating the upper and lower portions of the damper cylinder;
a piston coupled to the piston rod and disposed in a buffer space and an energy conversion space of the damper cylinder;
a blade disposed on one side of the piston disposed in the buffer space;
a magnetic material disposed on one side of the piston disposed in the energy conversion space; and
Including an induction coil disposed in the energy conversion space,
The blade is in contact with the fluid, and when the piston rod moves, the piston rotates around the piston rod by the flow resistance between the fluid and the blade, and the induction coil is the magnetic body coupled to the piston. generates electrical energy by
the piston
A cylindrical piston hub in which the blade is disposed on an outer surface at a lower portion;
It is composed of an extension cylinder extending from the upper end of the piston hub and having a diameter smaller than that of the piston hub,
The magnetic body is disposed on the outer surface of the extension cylinder,
Inside the damper cylinder, a partition wall having a through hole through which the extension cylinder is disposed is disposed to divide the buffer space and the energy conversion space,
Bearings are disposed between the inner surface of the piston hub and the outer surface of the piston rod, and between the inner surface of the extension cylinder and the outer surface of the piston rod,
A fixture for limiting the movement of the piston in the vertical direction on the piston rod is coupled to the piston rod corresponding to the lower end of the piston hub and the upper end of the extension cylinder,
The extension cylinder is formed with a stepped portion whose diameter decreases in an upward direction from the center side,
A magnetic body hub coupled to the magnetic body is rotatably coupled to the outer surface of the stepped portion,
A hydraulic damper having an energy harvesting function, characterized in that between the magnetic hub and the stepped portion is disposed a ratchet gear portion for rotating the magnetic hub when the stepped portion rotates in one direction.
delete delete delete According to claim 1,
The ratchet gear part
A first gear housing coupled to the stepped portion;
A rotation regulating rod having one side rotatably coupled to the first gear housing;
A hydraulic damper having an energy harvesting function, characterized in that it comprises a second gear housing coupled to the inner side of the magnetic hub and having an internal gear having an asymmetric inclination on the inner surface.

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