JP2593713Y2 - Vehicle steering damper - Google Patents

Description

[Detailed description of the invention]

[0001]

INVENTION The present invention relates to relates to the steering Dan <br/> path over of vehicles.

[0002]

2. Description of the Related Art Conventionally, as a damper used for a steering damper of a vehicle, a piston rod is inserted through a rod guide into a cylinder disposed in an outer tube, and a tip end of the piston rod is slid on an inner peripheral surface of the cylinder. A piston for generating damping force is fixed, and a bottom valve mechanism is provided at the back of the cylinder.A compression-side spring is also provided between the piston rod and the outer end of the outer tube to apply a reaction force in the compression stroke. In some cylinders, an extension spring is provided between a rod guide and a piston rod to apply a reaction force during an extension stroke.

In such a damper, when the piston rod enters and contracts in the cylinder, a damping force is generated by the bottom valve mechanism, and the compression-side spring applies a reaction force to the entry of the piston rod. Further, when the piston rod retreats from the cylinder and extends, the piston generates a damping force, and the extension-side spring applies a reaction force to the retraction of the piston rod.

[0004]

However, in the above-described damper, an extension spring is interposed between the rod guide and the piston rod in the cylinder. This obstructs the flow of hydraulic oil during operation and makes the damping force unstable. Also, since each spring is arranged between the piston rod and the outer end of the outer tube, and between the piston rod and the rod guide, the piston rod strokes immediately when disturbance enters in the neutral state, and the reaction force is reduced. Occur.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a piston rod inserted into a cylinder is maintained in a neutral state,
In a steering damper of a vehicle having an extension spring and a compression spring that apply a reaction force to the rod in an extension stroke and a compression stroke, respectively ,
The piston rod advances to the axial middle part of the closed tube.
Fix the retractable rod guide and insert it in front of the tube.
The piston rod moves between one end and the rod guide.
Damper oil that generates damping force on the extension side and compression side due to movement
Comparts and forms a chamber, the rod guide and the other end of the tube
Between the side and the compression that urges the piston rod to a neutral state
Car with side spring and extension side spring arranged in series
Both steering dampers. According to claim 2, assuming claim 1, setting a convex portion on the inner periphery of the tubes
Between the projection and the rod guide.
Between the projection and the other end of the tube.
Rings are arranged with presets, and pistons
The pressing member is fixed to the outer periphery of the rod, and the compression stroke of the damper
The piston rod is compressed via the compression member on the compression side
And the piston rod is pressed during the extension of the damper
Compress the extension spring through the member
Was.

[0006]

A damper oil chamber for generating a damping force with a rod guide is defined and formed at one end of the tube, and an extension side for biasing the piston rod to a neutral state at the other end defined by the rod guide of the tube. Since the compression-side springs are arranged in series, the flow of hydraulic oil in the damper oil chamber is not obstructed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a cross-sectional view of the damper according to the present invention in a neutral state, FIG. 2 is a cross-sectional view of the damper in a compressed state,
FIG. 3 is a sectional view of the damper in an extended state.

A rod guide 2 is provided in an outer tube 1.
Fix the rod guide 2 and the inner end of the tube (bottom)
And the damper cylinder 3 is disposed between them. A piston rod 6 is inserted into the damper cylinder 3 via an oil seal 4 and a rod guide 2 disposed outside the rod guide 2, and the distal end of the piston rod 6 comes into sliding contact with the inner peripheral surface of the damper cylinder 3. An oil passage 8 is formed in the piston 7 while the piston 7 is fixed, and a damping force is generated by a valve mechanism 9 that opens and closes the oil passage 8.

A bottom valve mechanism 11 is provided at the back of the damper cylinder 3, and a reservoir chamber between the outer tube 1 and the damper cylinder 3 communicating with the oil chamber in the damper cylinder 3 via the bottom valve mechanism 11. 12
A sponge 13 is housed inside. Above valve mechanism
9 and disposing the bottom valve mechanism 11 inside
Thus, a damper oil chamber is formed in the damper cylinder 3.

The axial direction of the open end of the outer tube 1
The outer tube 1 extends in the axial direction
Poured, the sub tube portion 15 which is integrally molded with the outer tube 1 is provided, videos spring bearing 16 and the cylindrical body 17 in the oil seal 4 side of the sub-tube portion 15, further to the open end of the sub tube portion 15

A projection 17a is formed on the inner peripheral surface of the central portion of the cylindrical body 17, and a spring receiver 20 is slidably fitted on the outer peripheral surface of the piston rod 6 on one side of the convex portion 17a.
A compression side spring 21 is interposed between the spring receiver 16 and the spring receiver 20 in a preset state. The cylindrical body 17
A spring receiver 24 is slidably fitted on the outer peripheral surface of the collar 23 fitted on the outer periphery of the piston rod 6 on the other side of the projection 17a of the piston rod 6 and an extension spring 25 is provided between the spring receiver 18 and the spring receiver 24. Is interposed in the preset state.

On the other hand, a spring 23 is fixed to the outer peripheral surface of the piston rod 6 by a collar 23 in a compression stroke and a pressing member 26 for pressing a spring holder 24 in an extension stroke. Mounting member 27 for
Is screwed.

With the above construction, when the piston rod 6 moves from the neutral state shown in FIG. 1 to the compression stroke and enters the damper cylinder 3 as shown in FIG. The piston rod 6 advances against the reaction force while compressing the compression-side spring 21 via the spring receiver 20 by the
1 generates a damping force. When the piston rod 6 moves out of the damper cylinder 3 after moving to the extension stroke as shown in FIG.
6, the piston rod 6 withdraws against the reaction force while contracting the extension spring 25 via the spring receiver 24,
The damping force is generated by the valve mechanism 9 of the piston 7.

In this case, since the compression-side spring 21 and the extension-side spring 25 are both provided outside the outer tube 1, the flow of hydraulic oil in the outer tube 1 during expansion and contraction is not impeded. Further, since the compression-side spring 21 and the extension-side spring 25 are both provided in a preset state, the piston rod 6 reacts by the reaction force until the external force applied to the piston rod 6 exceeds the preset force of these springs 21 and 25. Since the piston rod 6 starts the stroke only after exceeding the preset force without the stroke, the influence of the small disturbance is eliminated.

[0015]

[Effects of the Invention] As described above, according to the present invention,
According to claim 1, a piston rod inserted into a cylinder
While maintaining the neutral
To provide reaction force during the elongation and compression strokes.
Vehicle with compression and compression springs
In the steering damper, a tube with one end closed
The piston rod is inserted into the axial middle part of the valve so that it can move forward and backward.
To secure the rod guide, and
Between the head guide and the piston rod.
Partition and form a damper oil chamber that generates damping force on the compression side and compression side
Between the rod guide and the other end of the tube,
Compression spring that biases the piston rod to a neutral state
And the extension side spring are arranged in series to
Since it is configured to ring damper eliminates to inhibit the flow of hydraulic fluid of the damper cylinder when the steering Dan <br/> par telescopic movement of the vehicle, stable vehicle steering damper capable damping force obtained is obtained Can be Request again
In claim 2, according to claim 1, a convex portion is provided on the inner periphery of the tube.
Between the projection and the rod guide.
Between the projection and the other end of the tube.
Presets are arranged with presets, and fixed
The pressing member is fixed to the outer circumference of the
The piston rod is compressed by the compression spring
The piston rod is pressed during the extension stroke of the damper.
To compress the extension spring through the pressure member
External force applied to the piston rod
Until the preset force is exceeded, the piston
Exceeds preset force without rod stroke
Only when the piston rod starts stroke
When the vehicle's steering damper is in a neutral state.
No longer be affected by small disturbances.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a neutral state of a damper according to the present invention.

FIG. 2 is a cross-sectional view of the damper in a compressed state.

FIG. 3 is a cross-sectional view of the damper in an extended state.

[Explanation of symbols]

1: outer tube, 2: rod guide, 3: damper
-A damper cylinder constituting an oil chamber , 6 ... a piston rod, 7 ... a piston, 9 ... a valve mechanism, 11 ... a bottom valve mechanism, 15 ... a sub-tube part, 16, 18, 20,
Reference numeral 24: spring receiver, 17: cylindrical body, 17a: convex portion, 21: compression side spring, 25: extension side spring, 26: pressing member.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16F 9/00-9/54

Claims (2)

(57) [Scope of request for utility model registration] 1. A piston rod inserted into a cylinder
While maintaining the neutral
In a steering damper of a vehicle having an extension spring and a compression spring that apply a reaction force in the extension stroke and the compression stroke, respectively , a piston rod is provided at an axially intermediate portion of a tube whose one end is closed.
A rod guide through which the rod is inserted so as to be able to advance and retreat is fixed, and a piston is inserted between the one end of the tube and the rod guide.
The extension and retraction of the ton rod generates damping force on the extension side and compression side.
A partitioned damper oil chamber is formed and formed, and a pipe is provided between the rod guide and the other end of the tube.
A compression side spring that biases the ston rod to a neutral state
A steering damper for a vehicle, comprising an extension spring and a spring arranged in series . 2. A convex portion is provided on the inner periphery of the tube.
Insert the compression side spring between the projection and the rod guide side.
Between the convex part of the tube and the other end of the tube.
Each of them is set with a preset, and the piston rod
Fix the pressing member on the outer circumference and fix the piston during the compression stroke of the damper.
Rod compresses the compression side spring via the pressing member
The piston rod pushes the pressing member during the extension of the damper.
To compress the extension spring via
The steering damper for a vehicle according to claim 1, wherein
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