KR200237820Y1 - Shock absorption device using permanent magnet - Google Patents

Abstract

The present invention relates to a shock absorbing device, and more particularly, to a shock absorbing device that absorbs a shock applied suddenly by using a repulsive force acting between two or more permanent magnets. In order to achieve the above object, a shock absorbing device using a permanent magnet according to the present invention, in the shock absorbing device using a permanent magnet, as a cylinder, one end is sealed and the other end to the inlet of the piston A cylinder which is opened and has an air inlet of a predetermined size formed on a wall adjacent to the closed end to allow air to enter and exit; A piston, one end of which is capable of being introduced into the cylinder while maintaining airtightness through the open end of the cylinder, and the other end of which is always placed outside the cylinder to transmit pressure applied from the outside; At least two permanent magnets having a predetermined size and generally similar in shape to the cross section of the cylinder, one permanent magnet being fixedly disposed inside the closed end of the cylinder, and the other permanent magnet having a piston introduced into the cylinder. It is fixed at the end of the neighboring permanent magnets, characterized in that it comprises a permanent magnet, which is disposed so as to exert a reaction force between each other.

Description

Shock absorber using permanent magnets {SHOCK ABSORPTION DEVICE USING PERMANENT MAGNET}

The present invention relates to a shock absorbing device, and more particularly, to a shock absorbing device that absorbs a shock applied suddenly by using a repulsive force acting between two or more permanent magnets.

Various methods have been devised to absorb or cushion an impact on an object. Typical shock absorbers or shock absorbers include springs, which are usefully used in industrial devices such as automobiles and home appliances such as beds and sofas. In the case of the spring used in the vehicle, it is mounted between the wheel of the vehicle and the body to absorb and mitigate the impact energy transmitted from the wheel to the body. The spring used for this purpose is called a shock absorbing or dustproof spring.

The material of the spring may be a steel which has been heat-treated appropriately. In addition, metal materials such as phosphor bronze and nickel alloy may be used.

Metal springs include coil (helical) springs, ring springs, and dish springs. In the case of the coil spring, rod-shaped metal materials, such as round steel and angular steel, are wound in the form of cylindrical threads, and can be used for tension or compression. In the case of the compression coil spring, the coil spring may be made of two or three layers. In addition, leaf springs are also used, sometimes in one sheet, or in several sheets. Where a large external force is applied, the leaf springs which are trapped in a trapezoid or triangle are used, which is most often used in automobiles and railway vehicles.

Alternatively, air suspensions may be used to absorb shocks. An air spring is a spring that uses compressed air to put compressed air into a rubber container (Bellows). This spring has the characteristics of a variable spring whose spring constant changes according to the change of external force. Also, it is possible to keep the length of the spring constant regardless of the external force by installing an adjusting device that adjusts the volume of air in the container or the volume of the air chamber. . For this reason, it is widely used as a spring when the load in the empty car and when the load is full, such as a bus or a truck, fluctuates greatly, and is also used in railway vehicles. In addition, because of high insulation of high frequency vibration, there is no squeaking sound and less noise. In general, a bellows type is used for railroads and large vehicles, and a diaphragm type is used for passenger cars.

In the conventional spring device, when using a metal material, there is a problem that the weight is excessive by the weight of the spring itself, especially when the load is large or the impact is severe, the spring is used in multiple layers or multiple plates There is a problem that needs to be used. In addition, due to the use of a metal material, the elasticity of the metal is weakened by a syndrome such as metal fatigue as time passes. Therefore, the metal spring device must be replaced after a certain period of time. In addition, in the case of a metal spring, it cannot flexibly cope with a variable load. In other words, when the load on the device varies from time to time, it becomes difficult to adjust it as in the air spring.

On the other hand, in the case of the air spring 100 (see Fig. 1), it is possible to adjust the spring length according to the load, but for this purpose, a complex device must be used in parallel. That is, in the case of a large car, when the passengers increase during the stop and the load increases, the piston is pushed through a separate coil spring. At this time, oil is introduced through the needle, pushing up the piston to push up the air supply valve. When the air supply valve 103 is opened, the compressed air from the air tank is supplied to the auxiliary air chamber and the bellows through the air supply valve and the check valve to increase the height of the air spring. On the other hand, when the number of passengers decreases, the reverse operation of the link and the piston is performed in reverse, and the air of the balose is discharged into the atmosphere through the exhaust valve to lower the height of the spring. In the case of an air spring, a separate device to enable such an operation must be used, which increases cost and requires complicated mechanical operation.

The present invention is to solve such a conventional problem, it is an object to implement a semi-permanent shock absorbing device using the repulsive force of the permanent magnet.

Still another object of the present invention is to provide a shock absorbing device capable of simply adjusting the restoring force of the spring according to the load.

1 is a view showing the configuration of a conventional air spring

2 is a view showing an embodiment of the shock absorbing device of the present invention

3 is a view for explaining the operation of the shock absorbing device of the present invention

Figure 4 is a view showing the shape of the air inlet cover of the present invention

* Description of the symbols for the main parts of the drawings *

200: shock absorber 201: piston

202: cylinder 210-213: permanent magnet

221: air inlet 22: cover

223: hole

In order to achieve the above object, a shock absorbing device using a permanent magnet according to the present invention, in the shock absorbing device using a permanent magnet, as a cylinder, one end is sealed and the other end to the inlet of the piston A cylinder which is opened and has an opening of a predetermined size in the adjacent wall surface of the closed end to allow air to enter and exit; A piston, one end of which is capable of being introduced into the cylinder while maintaining airtightness through the open end of the cylinder, and the other end of which is always placed outside the cylinder to transmit pressure applied from the outside; At least two permanent magnets having a predetermined size and generally similar in shape to the cross section of the cylinder, one permanent magnet being fixedly disposed inside the closed end of the cylinder, and the other permanent magnet having a piston introduced into the cylinder. It is fixed at the end of the neighboring permanent magnets, characterized in that it comprises a permanent magnet, which is disposed so as to exert a reaction force between each other.

In addition, according to the present invention, the number of the permanent magnet is two, characterized in that the polarity of the opposite permanent magnet is the same polarity.

Further, according to the present invention, the number of the permanent magnets is three or more, and the permanent magnet (s) except for the two permanent magnets are fixed to each other and between the permanent magnets and the fixed permanent magnets and the magnetic repulsive force between the two permanent magnets. It is characterized in that the polarity is arranged to act.

In addition, according to the present invention, it is characterized by controlling the lowering speed of the piston by adjusting the size of the opening.

In addition, according to the present invention, a cover is attached to the outside of the opening.

In addition, according to the present invention, the cover is characterized in that a hole of a predetermined size for adjusting the amount of air flowing into the cylinder is formed.

(Example)

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a view showing an embodiment of the shock absorbing device using the repulsive force of the permanent magnet according to the present invention.

When pressure comes in the direction of the arrow from the top of the device to the shock absorbing device 200 of the present invention, the pressure is transmitted to the cylinder 202 through the piston 201. The piston 201 is inserted into one end (the upper part of the cylinder in the drawing) of the cylinder 202, and the other end (the lower part of the cylinder in the drawing) is sealed. On the other hand, a plurality of permanent magnets (210-213) having a shape substantially the same as the cross-sectional shape of the cylinder is inserted into the cylinder. One of these permanent magnets 213 is fixed to the other end of the cylinder, the lower part of the cylinder in the figure, another permanent magnet 210 abuts the end of the piston 201 inserted into the cylinder. The permanent magnet 210 in contact with the end of the piston may be fixed or fixed only at the end thereof and in contact. As will be described later, even if the permanent magnet is not fixed to the end of the piston by an adhesive or the like, the permanent magnet can always be in close contact with the piston by the repulsive force with other permanent magnets.

In addition to the two permanent magnets 210 and 213 described above, other permanent magnets are used in the cylinder. In the figure, two different permanent magnets 211 and 212 are used, and all of them are floating in the air by magnetic repulsive force. That is, two permanent magnets 211 and 212 floating in the air are disposed to have the same polarity facing each other so that the repulsive force acts on each other. Therefore, the two permanent magnets 211 and 212 are spaced apart by a certain distance when no load is given in the direction of the arrow. Meanwhile, among the permanent magnets floating in the air, the permanent magnets 211 disposed on the upper side of the drawing are disposed to have the same polarity as the polarities facing the permanent magnets 210 in contact with the piston 201, so that the repulsive force is mutually different. This will work. Therefore, it can be seen that these two permanent magnets 210 and 211 are also spaced apart from each other by a certain distance when no load is applied from the top. Among the permanent magnets floating in the air, the permanent magnets 212 disposed at the bottom of the drawing are also arranged to have the same polarity as the polarities facing the permanent magnets 213 fixed to the bottom of the cylinder, so when no load is applied from the top. Spaced apart from each other at a constant distance.

In the present embodiment, four permanent magnets are described as being disposed in the cylinder 202, but this is only one embodiment, and the number of permanent magnets is at least two, so that they can be expanded continuously. Although the number of permanent magnets varies, the permanent magnets next to each other should be arranged so that opposite magnetic poles are of the same polarity. In this arrangement, all the permanent magnets in the cylinder have a repulsive force acting on each other to maintain a constant distance between the permanent magnets.

When pressure is applied from the upper part of the piston in a state in which the permanent magnets 210 to 213 are arranged at regular intervals in the cylinder, the piston moves to the inside of the cylinder, that is, the lower part of the cylinder in the drawing. At this time, the permanent magnet 210 in contact with the lower portion of the piston approaches the permanent magnet 211 disposed on the upper side of the permanent magnet floating in the air. In this case, the permanent magnet 211 maintains a predetermined position by the repulsive force between the permanent magnet 210 and the permanent magnet 212 and then moves in the direction of the permanent magnet 212.

On the other hand, the permanent magnet 212 also maintains a predetermined position by the repulsive force with the permanent magnet 211 and the permanent magnet 213, as the permanent magnet 211 approaches, that is, the permanent magnet 213 Move toward). The permanent magnet 213 is fixed to the bottom of the cylinder, so that it can no longer move to the lower side and as the permanent magnet 212 approaches, it will apply a greater repulsive force to the permanent magnet 212.

Thus, the position of each permanent magnet when the pressure is applied at the top of the piston and transmitted to the cylinder is shown in FIG. 3. As described above, when pressure is applied to the shock absorbing device of the present invention, each permanent magnet absorbs the pressure step by step from the top to occupy the position as shown in FIG. Although a certain gap exists between the permanent magnets in the figure, four permanent magnets may be instantaneously superimposed according to the magnetic force of each permanent magnet.

Now, the mechanism when the piston is restored again after the shock is absorbed through the device of the present invention will be described. The cylinder of the shock absorber of the present invention is basically sealed. That is, the part where the cylinder and the piston are connected is completely sealed, so even though the piston moves up and down within the cylinder, the air inside the cylinder does not go out or the outside air flows into the cylinder through the connection part. Will not. On the other hand, as shown in Figures 2 and 3, the air inlet 221 is formed separately at a predetermined position of the cylinder, it is possible to adjust the amount of air in the cylinder in accordance with the movement of the piston. In this embodiment, an air inlet and outlet is formed in the lower part of the cylinder. The air inlet may be an opening formed in the side wall surface of the cylinder, and a cover 222 is formed in the opening. The cover 222 is attached to the air inlet 221, the upper portion thereof can be easily opened and closed by the entry and exit of air. Thus, when pressurized, the piston moves inside the cylinder, and when the air inside the cylinder is pushed out, the cover is easily opened to release the air relatively quickly. Therefore, when an impact is applied from the outside, the piston moves quickly to the lower portion of the cylinder, thereby absorbing the impact relatively quickly. The structure of this cover 222 is shown in FIG. The cover is shaped as seen in the direction of the arrow A in FIGS. 2 and 3.

On the other hand, when the piston is restored again after descending to the lowest point in the cylinder, the repulsive force acts between the permanent magnets under the assumption that the cause of pressure applied from the upper side is removed, thereby returning to the position where the permanent magnets originally had. However, the piston and permanent magnets do not immediately return to their original positions. At the moment when the piston rises again after the air flows out of the cylinder, outside air flows into the cylinder through the air inlet, and the cover 222 blocks the opening. At the moment when the air inlet cover of the cylinder is blocked, no more air is introduced into the cylinder and the piston stops rising anymore.

A hole 223 of a predetermined size is drilled in the center of the cover 222 of the air outlet. When the piston rises in the cylinder by such a hole, even though the cover 222 of the air inlet port covers the inlet port, some air flows into the cylinder and the piston gradually rises. By adjusting the size of the hole it is possible to control the speed at which the piston rises in the cylinder. That is, when the size of the hole is relatively large, the speed of restoring the piston can be relatively high. On the other hand, if the size of the hole is drilled relatively small, the speed of restoring the piston can be relatively slow. This is true even when adjusting the size of the air inlet to adjust the speed of descending the piston when pressure is applied.

By implementing the present invention, it is possible to implement a semi-permanent shock absorbing device using the repulsive force of the permanent magnet. In addition, it is possible to simply adjust the restoring force of the shock absorbing device in accordance with the load.

Claims (6)

In the shock absorber using a permanent magnet, A cylinder, one end of which is closed and the other end of which is opened to allow the inflow of a piston, and a cylinder having an air inlet of a predetermined size to allow air to enter and exit the adjacent wall surface of the closed end; A piston, one end of which is capable of being introduced into the cylinder while maintaining airtightness through the open end of the cylinder, and the other end of which is always placed outside the cylinder to transmit pressure applied from the outside; At least two permanent magnets having a predetermined size and generally similar in shape to the cross section of the cylinder, one permanent magnet being fixedly disposed inside the closed end of the cylinder, and the other permanent magnet having a piston introduced into the cylinder. The permanent magnet is fixed to the end of the neighboring permanent magnets, the shock absorbing device using a permanent magnet, characterized in that it comprises a permanent magnet, which is disposed so as to exert a reaction force between each other. The method of claim 1, The number of the permanent magnet is two, the shock absorbing device using a permanent magnet, characterized in that the polarity of the opposite permanent magnet is the same polarity. The method of claim 1, The number of the permanent magnets is three or more, and the remaining permanent magnet (s) except for the two permanent magnets are arranged in polarity such that the permanent magnets and the magnetic repulsive force act on each other and between the two permanent magnets. Shock absorbing device using a permanent magnet, characterized in that. The method of claim 1, Shock absorbing device using a permanent magnet, characterized in that for controlling the falling speed of the piston by adjusting the size of the air inlet. The method according to claim 1 or 4, Shock absorbing device using a permanent magnet, characterized in that the cover is attached to the outside of the air inlet. The method of claim 5, The cover is a shock absorbing device using a permanent magnet, characterized in that a hole of a predetermined size for controlling the amount of air flowing into the cylinder is formed.