JPH0519694U - damper - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a damper that exhibits a predetermined damping function with a simple operation and is optimal for expecting its versatility. A damper that can change a damping force generated in the piston part 3 by rotating a rotary rod 4 when the piston part 3 slides in the cylinder 1 is used.
1 is a circular arc-shaped groove 3 that communicates a plurality of open ports 31a.
1c on the other hand, the valve 5 is an annular leaf valve having a plurality of cutouts which are provided at appropriate intervals on the peripheral portion thereof and selectively communicate with the arcuate groove 31c, and the arcuate groove 31c is accommodated in the chamber. The adjuster valve 50 is provided so as to be closed from the 30b side, and the check valve 51 is formed of an annular leaf valve and is stacked on the adjuster valve 50. The check valve 51 is held at the tip of the rotary rod 4 and The tip end has the adjuster 6 that is present in the chamber 30b, and the adjuster valve 50 is connected to the adjuster 6.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an improvement of a damper that is enclosed by a gas and extends by a gas pressure.

[0002]

[Prior Art]

 Various dampers have been proposed as a damper that expands with the gas pressure enclosed inside.However, when the damper is expanded, a certain damping force is generally created by the flow path resistance of the hydraulic oil contained in the cylinder as it passes through the damping valve. It is configured to exert an action.

There are various types of damping valves, but when the damping valve is, for example, a needle valve type, the magnitude of the generated damping force can be controlled only by controlling the so-called advancing / retreating amount of the damping valve. Can also be changed, and its versatility can be expected.

[0004]

[Problems to be solved by the device]

 However, in the damper using the needle valve type damping valve described above, even if the damping valve is slightly moved back and forth, the generated damping force tends to change rapidly, and therefore its adjustment work is not easy. There is inconvenience.

In order to facilitate the work, it is necessary to control the amount of advance / retreat of the damping valve with extremely high precision, which is accompanied by the precision of the damping valve itself. Therefore, the cost of the damper is likely to increase, and there is a danger that the versatility of the damper cannot be expected to improve.

The present invention was devised in view of the above-mentioned circumstances, and its purpose is to achieve a predetermined damping function with a simple operation, and is ideal for expecting its versatility. Is to provide a damper.

[0007]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the structure of the present invention is configured so that the tip of a piston rod that is inserted into and retracted from the inside of a cylinder is slid in the cylinder so that the rod is inserted into the cylinder. It has a piston part that connects the piston body that divides the side oil chamber and the piston side oil chamber, and a gas chamber that biases the piston part in the extension direction in the cylinder. In addition, it has a rotary rod that is rotatably inserted in the shaft core of the piston rod, and when the piston part slides in the cylinder, the rotary rod rotates to dampen the piston part. In a damper configured to change the force, a port in which a piston body communicates with a rod-side oil chamber, a chamber communicating with the port and a piston-side oil chamber, and the chamber and the piston side Oil chamber A valve seat member disposed in the chamber so as to cut off the communication, and a chamber side opening of a plurality of ports opened in the valve seat member to communicate the chamber with the piston side oil chamber. A valve disposed on the seat side end surface of the valve seat member so as to close the valve seat member, and the valve seat member communicates with the seat side end surface a plurality of ports for opening the valve seat member. The valve comprises an annular leaf valve having a plurality of cutouts which are provided at appropriate intervals in the peripheral portion thereof and which selectively communicate with the arcuate groove. It has an adjuster valve arranged so as to close the arcuate groove from the chamber side, and a check valve composed of an annular leaf valve and laminated on the adjuster valve, and the tip of the rotary rod. Is held in conjunction with the tip becomes a adjuster that is His presence in the vessel chamber, in which the above adjuster valve to the adjuster is formed by interlocking.

[0008]

[Action]

 Therefore, when the piston slides in the extension direction in the cylinder, the working oil in the rod-side oil chamber is the port and chamber of the piston body, the selected notch of the adjuster valve that constitutes the valve, and the valve seat. It flows out to the piston side oil chamber through the arcuate groove and port of the member.

When the number of notches in the adjuster valve facing the arcuate groove in the valve seat member is one, a large flow resistance is generated, which is generated in the piston part. The damping force is high.

Further, when the rotary rod is rotated and the adjuster valve is rotated so that the number of notches facing the arcuate groove is all, only a small flow resistance is generated. The damping force generated at the piston is low.

Incidentally, when half of the cutouts face the arcuate groove, the damping force generated in the piston portion becomes medium.

[0012]

【Example】

 Referring to the drawings, a damper according to an embodiment of the present invention will be described with reference to FIG. 1 in which a tip of a piston rod 2 which is inserted into and retracted from the inside of a cylinder 1 is installed inside the cylinder 1. In addition to having a sliding piston portion 3, it has a rod side oil chamber A and a piston side oil chamber B that are partitioned and formed in the cylinder 1 by a piston body 30 that constitutes the piston portion 3. .

The damper has a rotary rod 4 that is rotatably inserted into the axial center of the piston rod 2, and the rotary rod 4 is moved when the piston portion 3 slides in the cylinder 1. It is configured so that it can rotate to change the damping force generated in the piston part 3.

Although not shown, the damper has a gas chamber defined in the piston-side oil chamber B and biasing the piston portion 3 in the cylinder 1 in the extension side direction.

As shown in FIG. 2, the piston main body 30 includes a port 30a communicating with the rod side oil chamber A, a container chamber 30b communicating with the port 30a and a piston side oil chamber B, and the container chamber 30b. The valve seat member 31 is provided in the volume chamber 30b so as to block communication between the piston side oil chamber B and 30b.

Then, the piston main body 30 is opened in the valve seat member 31 to close the chamber-side openings of the plurality of ports 31 a that communicate the chamber 30 b with the piston-side oil chamber B. The valve 5 is provided on the seat side end surface 31b of the seat member 31.

On the other hand, as shown in FIG. 3, the valve seat member 31 is provided with an arc-shaped groove 31c that collectively communicates the plurality of ports 31a on the seat side end surface 31b thereof. The valve 5 is arranged so as to close the arc-shaped groove 31c from the side of the chamber 31.

The valve 5 includes an adjuster valve 50 arranged so as to close the arcuate groove 31c, and a check valve 51 laminated on the adjuster valve 50. The adjuster valve 50 is set so as to be brought into close contact with the seat side end surface 31b of the valve seat member 31 by an urging force from a leaf spring 52 arranged above the check valve 51.

The adjuster valve 50 is composed of an annular leaf valve, and as shown in FIG. 3, has a plurality of notches 50a provided at appropriate intervals on its periphery and selectively communicating with the arcuate groove 31c. Is set to have.

The check valve 51 is composed of an annular leaf valve having the same diameter as the adjuster valve 50, and is stacked so as to cover the adjuster valve 50.

Further, the adjuster valve 50 has an adjuster 6 which is held at the tip of the rotary rod 4 and whose tip is present in the chamber 30b, and at the same time, the adjuster 6 is provided with the adjuster 6. The valve 50 is connected.

The rotary rod 4 is set so as to be rotated under the interposition of the detent mechanism 9 by rotating the dial 8 provided in the bracket 7 portion continuously provided on the upper end of the piston rod 2. (See FIG. 1).

By the way, although the adjuster valve 50 is in a state of being connected to the adjuster 6, in this embodiment, as shown in FIG. 3, while the cutout surface 6 a in the axial direction is formed on the outer periphery of the adjuster 6, the adjuster valve 50 is formed. A protrusion 50b is formed on the inner circumference of the groove 50 so as to be matched with the notch surface 6a, and the notch surface 6a and the protrusion 50b are engaged with each other to connect them.

Incidentally, the check valve 51 is not connected to the adjuster 6, and the initial set position can be maintained even when the adjuster valve 50 rotates.

As a result, according to the damper according to this embodiment formed as described above, when the piston portion 3 slides in the cylinder 1 in the extension side direction, the inside of the rod side oil chamber A is The hydraulic oil flows into the piston-side oil chamber B through the port 30a and the chamber 30b of the piston body 30, the cutout portion 50a of the adjuster valve 50 forming the valve 5, the arcuate groove 31c of the valve seat member 31 and the port 31a. Will be done.

When the number of notches 50a in the adjuster valve 50 facing the arcuate groove 31c in the valve seat member 31 is one as shown in FIG. 3, a large flow resistance occurs. As a result, the damping force generated in the piston portion 3 will be high.

Further, the rotary rod 4 is rotated to rotate the adjuster valve 50, for example, in a direction indicated by an arrow in FIG. 3, and the number of the notches 50a facing the arc-shaped groove 31c is three. In the case of all (not shown), only a small flow resistance is generated, and the damping force generated in the piston portion 3 is low.

Incidentally, when the two cutouts 50a face the arcuate groove 31c, the damping force generated in the piston portion 3 becomes medium, and the cutouts 50a are entirely arcuate. When it is not opposed to the groove 31c, the extension of the damper can be prevented.

When the piston portion 3 slides in the cylinder 1 in the compression side direction, the working oil in the piston side oil chamber B passes through the port 31 a of the valve seat member 31, the arc-shaped groove 31 c, and the valve 5. It flows into the rod-side oil chamber A through the gap formed by the bending of the outer peripheral ends of the adjuster valve 50 and the check valve 51, the volume chamber 30b of the piston body 30, and the port 30a.

Therefore, by setting the rotation amount of the rotary rod 4 so as to be regulated in advance by the detent mechanism 9, the rotation amount of the adjuster valve 50, that is, the level of the damping force generated in the piston portion 3 is increased or decreased. Can be controlled easily.

Although the adjuster valve 50 is connected to the adjuster 6 in the illustrated embodiment, the adjuster valve 50 may be omitted and the adjuster valve 50 may be directly connected to the tip of the rotary rod 4. Of course, it is okay to be connected to.

[0032]

[Effect of the device]

 As described above, according to the present invention, the damping force generated at the piston portion can be adjusted freely by simply selecting the number of notches in the adjuster valve facing the arcuate groove in the valve seat member. In addition, the adjustment operation only requires rotating the rotary rod that is inserted into the piston rod, and since there is a so-called allowance between adjacent notches in the adjuster valve, The desired damping force can be controlled without performing the rotary operation of the rotary rod precisely, and by setting the rotary amount of the rotary rod to be regulated in advance by the detent mechanism, the rotary amount of the adjuster valve, that is, In addition, it is possible to easily control the level of the damping force generated in the piston portion, and other various effects are achieved.

[Submission date] April 6, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction content]

The present invention relates to improvement of a damper utilizing hydraulic pressure.

[Procedure amendment 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

[Prior Art]

 Various types of dampers using hydraulic pressure have been proposed in the past, but in general, when expanded, it is configured so that a predetermined damping action is exerted by the flow passage resistance when the hydraulic oil contained in the cylinder passes through the damping valve. Has been done.

[Procedure correction 4]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction content]

In order to facilitate the work, it is necessary to control the amount of advance / retreat of the damping valve extremely precisely, which is accompanied by the precision of the damping valve itself. However, there is a danger that the cost of the damper will increase and it will not be possible to expect improvement in its versatility.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the configuration of the present invention is provided with a piston for partitioning the rod-side oil chamber and the piston-side oil chamber at the tip of the piston rod that is inserted into and retracted from the cylinder, and the piston rod In a damper in which the damping force is changed by rotating the rotary rod housed in the piston, a valve seat member is fixed to the piston main body to form a chamber, and the piston main body and the valve seat member have the same capacity. Each of the ports provided to connect the chamber to the rod-side oil chamber and the piston-side oil chamber is provided, and the port-side end of the port provided in the valve seat member has an arc shape, and the arc-shaped port end is It is assumed that a check valve is laminated on the adjuster valve while selectively communicating with notches provided at appropriate intervals on the adjust valve via a rotary rod.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Delete

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction content]

On the other hand, as shown in FIG. 3, the valve seat member 31 is provided with an arc-shaped groove 31c that collectively communicates the plurality of ports 31a on the seat side end surface 31b thereof. The valve 5 is arranged so as to close the arc-shaped groove 31c from the side of the chamber 30b.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Name of item to be corrected] 0019

[Correction method] Change

[Correction content]

The adjuster valve 50 is composed of an annular leaf valve and, as shown in FIG. 3, has a plurality of openings 50a provided at appropriate intervals on its periphery and selectively communicating with the arcuate groove 31c. Is set to have.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of a damper according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a piston portion, which is a main portion of the damper shown in FIG.

FIG. 3 is an enlarged plan view showing an adjuster valve together with a valve seat member.

[Explanation of symbols]

 1 Cylinder 2 Piston Rod 3 Piston Part 4 Rotary Rod 5 Valve 6 Adjuster 30 Piston Body 30a, 31a Port 30b Chamber 31 Valve Seat Member 31b Seat Side End Face 31c Circular Groove 50 Adjuster Valve 50a Cutout 51 Check Valve A Rod Side oil chamber B Piston side oil chamber

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[Procedure amendment]

[Submission date] April 6, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Item name to be amended] Scope of utility model registration request

[Correction method] Change

[Correction content]

[Scope of utility model registration request]

Claims (1)

[Scope of utility model registration request] 1. A piston main body for slidingly forming a rod-side oil chamber and a piston-side oil chamber in the cylinder is continuously provided at the tip of a piston rod that is inserted into and retracted from the cylinder. And a gas chamber for urging the piston portion in the cylinder in the expansion direction in the piston side oil chamber, and a rotary rod rotatably inserted in the axial center portion of the piston rod. In the damper configured to change the damping force generated in the piston portion by rotating the rotary rod when the piston portion slides in the cylinder, Port communicating with the chamber, a chamber communicating with the port and communicating with the piston-side oil chamber, and a valve seat member disposed in the chamber so as to block communication between the chamber and the piston-side oil chamber And the bar A valve disposed on the seat-side end surface of the valve seat member so as to close the opening on the container chamber side of the plurality of ports which are opened in the seat member to communicate the container and the piston-side oil chamber. On the other hand, the valve seat member has an arcuate groove on its seat side end surface that communicates a plurality of ports for opening the valve seat member, while the valve has an appropriate space around its circumference. An annular leaf valve having a plurality of notches that selectively communicate with the arcuate groove and is provided so as to close the arcuate groove from the chamber side; and an annular leaf valve. And a check valve laminated on the adjuster valve, and having an adjuster held at the tip of the rotary rod and having its tip present in the chamber, Damper, characterized in that the adjuster valve is formed by interlocking the adjuster.