KR20060102691A - Piston valve of a shock absorber - Google Patents

Abstract

The present invention relates to a piston valve of a shock absorber, the disk-H 130 is provided with a plurality of holes 131 is formed on the lower surface of the body 111, the circumferential direction on the lower side of the disk-H (130) The first sub-disc 150 and the first sub-disc 150 formed with a plurality of slits 142 are provided, and a plurality of sub-holes 150a and 152a are formed below the disk-S 140, respectively. The two sub disks 152 are stacked and provided, and the lower disk 160 of the original disk is installed below the first and second sub disks 150 and 152, and the disk 170 of the multiple board is provided below the row disk 160. ) 172 is characterized in that it is installed. Therefore, the disks stacked on the lower surface of the piston valve have two stages of damping force characteristics in the low speed section, and linear damping force characteristics in the high speed section. It is effective to tune the damping force of.

Description

피스톤 PISTON VALVE OF A SHOCK ABSORBER}

1 is a cross-sectional view showing a piston valve of a conventional shock absorber,

2 is a piston valve damping force characteristic curve of a conventional shock absorber,

3 is a cross-sectional view showing the piston valve of the shock absorber according to the present invention,

4 is an exploded perspective view of the piston valve of the shock absorber according to the present invention;

5 is a damping force characteristic curve of the piston valve of the shock absorber according to the present invention.

<Description of the code | symbol about the principal part of drawing>

102 tube 103 tension chamber

104: compression chamber 105: piston rod

110: piston valve 111: body

113: compression passage 114: tension passage

120: intake valve assembly 130: disk-H

131, 141: hole 140: disk-S

142: slit 150, 152: 1st, 2nd sub disk

150a, 152a: Subhole 160: Low Disc

170 and 172: first and second disk

The present invention relates to a piston valve of a shock absorber, and more particularly, to a damping force adjustment in a low speed section, and to a piston valve of a shock absorber capable of tuning an optimal damping force by implementing a sensational characteristic in a high speed section.

In general, shock absorbers are used to quickly absorb vibrations generated from a vibrating body such as a vehicle to extinguish continuous residual vibrations. The shock absorber is mainly disposed between a body part located at an upper part of a spring and a chassis part located at a lower part of a spring. It is installed and used in.

The shock absorber is a device that allows the piston rod combined with the piston valve to be reciprocated inside the oil filled tube so that vibration generated in the vehicle is attenuated by the viscosity of the oil. As the oil inside flows through the piston valve, the kinetic energy is converted into thermal energy, thereby damping the vibration generated in the vehicle.

As described above, the damping effect on the vibration of the vehicle is mostly performed in the piston valve of the shock absorber. The structure of the piston valve which is mainly used in the related art is shown in FIG.

As shown, the piston valve 10 is installed at the end of the piston rod 5 linearly reciprocating along the interior of the cylindrical tube 2 to compress the interior of the cylindrical tube 2 with the tension chamber 3. It is divided into two space parts which are chambers 4.

In the body 11 of the piston valve 10, a compression passage 12 and a tension passage 13 communicating the tension chamber 3 and the compression chamber 4 of the cylindrical tube 2 are shown in FIG. 1. As formed vertically, the intake valve assembly 20 for opening and closing the compression passage 13 is provided above the body (11).

Here, the intake valve assembly 20 is provided with an intake valve 21 on the upper side of the body 11, the retainer 22, the intake spring 23, the washer valve 24 is installed in the upper portion. And the lower surface of the body 11 is provided with the multi-plate disk 30 which opens and closes the tension flow path 14 in order.

In addition, a disk-S 31 having a plurality of slits 31a formed in the radial direction is provided on the upper surface of the multi-disc disk 30.

The piston valve of the conventional shock absorber configured as described above linearly reciprocates the inside of the cylindrical tube 2 according to the linear reciprocating motion of the piston rod 5, while the tension chamber 3 and the compression chamber inside the cylindrical tube 2 are compressed. The pressure difference is generated between (4). Therefore, the fluid filled in the tension chamber 3 and the compression chamber 4 by the pressure difference between the tension chamber 3 and the compression chamber 4 is intaken through the compression flow path 12 formed in the piston valve 10. The valve 21 is pushed upward, and the tension passage 13 generates a constant damping force through the circular movement while pushing the multi-plate 30 downward.

That is, in a low speed section in which the pressure of the fluid is weak, the fluid circulates through the slit 31a of the disk-S 31 provided on the upper surface of the multi-disc disk 30 to generate a damping force, and the pressure of the fluid gradually increases. In the medium speed and the high speed section, the fluid is cyclically moved while pushing the entire disk 30 downward to generate a damping force.

However, the piston valve of the conventional shock absorber configured as described above, as shown in Figure 2, in the process of generating a damping force while the fluid exits through the slit 31a formed in the disk-S 31 in the low-speed section, The nonlinear damping force characteristic is proportional to the square of the velocity, and the rapid nonlinear damping force appears in the high speed section.

In addition, in recent years, a lot of vehicles are produced in which the main damping force is generated in the low speed section, and in particular, such a vehicle is required to increase the damping force in the low speed section, and it is difficult to control the damping force characteristics, so that the riding comfort and steering stability cannot be satisfied at the same time. There was this.

The present invention is to solve the conventional problems as described above, by the disks stacked on the lower surface of the piston valve, the damping force characteristics of the two stages appear in the low-speed section, by configuring the linear damping force characteristics in the high-speed section The purpose of this invention is to provide a shock absorber piston valve that can tune the optimum damping force by implementing damping force adjustment and sensational characteristics at low speed and high speed.

In order to achieve the above object, the present invention, the compression passage and the tension passage is formed with a plurality of bodies with a predetermined interval, the intake valve and a plurality of discs of the single plate is installed on the upper and lower surfaces of the body to open and close the compression passage and the tension passage In the piston valve of the shock absorber, which is provided with a plurality of teeth, a disk-H having a plurality of holes is formed in the lower surface of the body, and a disk-S having a plurality of slits formed in the circumferential direction is installed below the disk-H. The first sub disk and the second sub disk, each of which has a plurality of sub-holes formed on the lower side of the disk-S, are stacked and provided, and the lower disk of the original disk is disposed below the first and second sub disks, and the lower side of the low disk. It provides a piston valve of the shock absorber, characterized in that the disk of the multi-plate is installed.

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

3 is a cross-sectional view showing a piston valve of the shock absorber according to the present invention, Figure 4 is an exploded perspective view of the piston valve of the shock absorber according to the present invention, Figure 5 is a damping force characteristics of the piston valve of the shock absorber according to the present invention It is a curve.

The piston valve of the shock absorber according to the present invention, as shown in Figure 3, the piston valve 110 is installed at the end of the piston rod 105 to linearly reciprocate along the interior of the cylindrical tube 102 and cylindrical The inside of the tube 102 is divided into two space portions, which are the tension chamber 103 and the compression chamber 104.

And the body 111 of the piston valve 110, the compression passage 112 and the tension passage 113 for communicating the tension chamber 103 and the compression chamber 104 of the cylindrical tube 102 is formed vertically, the body An intake valve assembly 120 that opens and closes the compression passage 113 is installed above the 111.

Here, the intake valve assembly 120 is provided with an intake valve 121 on the upper side of the body 111, the retainer 122, the intake spring 123, the washer valve 124 is installed in the upper portion.

And the lower surface of the body 111, in accordance with the features of the present invention, as shown in Figure 4, a plurality of disks for opening and closing the tension flow passage 113 is installed in turn.

One disk-H 130 is installed on the lower surface of the body 111, and the disk-H 130 has a plurality of holes 131 formed on the circumferential surface of the disc.

The disk-S 140 is installed on the lower surface of the disk-H 130. One disk-S 140 is also provided, and a plurality of holes 141 and a plurality of slits 142 are formed in the circumferential direction of the end portion on the circumferential surface.

The first and second sub disks 150 and 152 and the low disk 160 are provided one by one under the disk-S 140.

Here, the low disk 160 of the disk without holes, the first and second sub disks 150 and 152 and the disk-H 130 have the same diameter, whereas the disk-S 140 is larger than the disks above. By forming a small, the noise can be reduced by the smooth movement of the oil, and the oil passes through the slit 142, the damping force characteristics of the two stages appear in the low-speed section as described in the damping force diagram to be described later.

Sub-holes 150a and 152a are formed on the first and second sub-disc 150s and 152, respectively, and the second sub-disc 152 is relatively smaller than the sub-holes 150a of the first sub-disc 150. A large diameter of the sub-hole 152a is formed to allow a large amount of oil to contact the low disk 160 to generate a damping force.

In addition, the first disk 170 and the second disk 172 of the multi-plate is installed below the low disk 160, the retainer 180 is further installed therebetween to maintain the gap with the low disk 160.

Preferably, the first and second disks 170 and 172 may adjust the damping force in the high speed section by adjusting the stacking number and the outer diameter of the disk. In addition, the second disk 172 stacked below the first disk 170 has a configuration in which the diameter of the second disk 172 is relatively small to support the first disk 170 at the bottom.

The piston valve of the shock absorber according to the present invention configured as described above is operated as follows.

First, in the low speed section during the compression stroke, the oil flowing into the compression passage 112 of the body 111 while the oil moves downward along the piston valve 110 is tensioned while pushing up the intake valve 121 upwards. It is introduced into the chamber 103 to generate a damping force.

In the low speed section during the tension stroke, oil is introduced into the tension channel 113 of the body 111 of the piston valve 110 as shown by the dotted line in FIG. 3 and the hole 131 of the disk-H 130. While passing through the slit 142 of the disc-S 140, the damping force of the display 1 appears in the low speed section as shown in the diagram of FIG.

The damping force as shown in Fig. 1 can satisfy the riding comfort and steering stability of the vehicle, especially in which the damping force is increased in the low speed section.

As the pressure increases, the oil introduced into the tension passage 113 passes through the holes 131 of the disc-H 130 and the holes 141 of the disc-S 140 as shown in FIG. 3. The low disk 160 is pushed through the sub-holes 150a and 152a of the first and second sub-disks 150 and 152 and is introduced into the compression chamber 104.

Here, the display in the low speed section is indicated by the low disk 160 hitting the sub-hole 152a of the second sub-disk 152 having a larger diameter than the sub-hole 150a of the first sub-disk 150 while the oil passes. The damping force characteristic of is shown.

If the pressure continues to increase, the damping force characteristic of the display 3 in the diagram in the middle speed section is indicated by the number of sheets stiffness of the first disk 170 and the second disk 172.

In the high-speed section, the area of the oil pressure is increased by the first and second sub discs 150 and 152, so that the first disc 170 having a wide outer diameter can be used, thereby allowing the first disc 170 to be used. By increasing the outer diameter of), it may have a gentle damping force characteristic of the display 4 at high speed.

Therefore, in the present invention, as shown in Figure 5, the disk-S 140 in the low speed section to implement the damping force of the two stages and the gentle damping force characteristics in the high speed section can be tuned to the optimum damping force.

Although the present invention has been illustrated and described with respect to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and a person skilled in the art to which the present invention pertains has the present invention set forth in the claims below. Various modifications may be made without departing from the spirit of the invention.

As described above, according to the piston valve of the shock absorber of the present invention, the disks stacked on the lower surface of the piston valve have a damping force characteristic of two stages in a low speed section, and a linear damping force characteristic is generated in a high speed section. The damping force adjustment and sensory characteristics in the low speed and high speed section can be implemented to tune the optimal damping force.

Claims (6)

On the piston valve of the shock absorber is provided with a plurality of compression passages and tension passages formed at predetermined intervals, the intake valve of the single plate is provided on the upper and lower surfaces of the body to open and close the compression passages and tension passages In Disk-H is provided in the lower surface of the body is formed a plurality of holes, A disk-S having a plurality of slits formed in the circumferential direction is provided below the disk-H, A first sub disc and a second sub disc, each of which has a plurality of sub holes formed on the lower side of the disc-S, are stacked and A raw disk of a disc is provided below the first and second sub-disks, In the lower side of the row disk is installed a disk of multiple plates, Piston valve of the shock absorber, characterized in that. The method of claim 1, The piston valve of the shock absorber, characterized in that the two-stage damping force characteristics in the low speed section as shown in the damping force diagram as the oil passes through the slit of the disk-S. The method of claim 1, The disk-S, the piston valve of the shock absorber, characterized in that the noise can be reduced by the smooth movement of the oil by forming smaller than the diameter of the disk-H and the first and second sub-disc. The method of claim 1, The piston valve of the shock absorber to form a larger diameter of the sub-hole of the second sub-disk than the sub-hole of the first sub-disc so that a large amount of oil is in contact with the low disk to generate a damping force. The method of claim 1, A shock absorber piston valve capable of adjusting the number of sheets stacked and the outer diameter of the disk to adjust the damping force at high speed. The method of claim 1, Some of the number of sheets stacked on the lower portion of the disk, the piston valve of the shock absorber, characterized in that the smaller diameter is supported from the bottom.

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