JPS6037476Y2 - Damping force adjustment device for shock absorber - Google Patents

Description

[Detailed description of the invention] The present invention relates to a damping force adjustment device for a shock absorber, and more specifically, the orifice provided in the piston rod is made variable by external operation, thereby making it possible to switch the damping force into multiple stages. This invention relates to a damping force adjustment device for a type of shock absorber.

In this type of conventional shock absorber, when the orifice provided in the piston rod is made variable by external operation, the piston rod is attached by forming a hole or space oriented laterally at the base end of the eye. When a small adjustable adjuster is rotatably inserted and the adjuster is rotated by hand, the operating rod that interlocks with the adjuster selects one of the orifices at the tip of the rotating waist operating rod.

However, when operating with a small adjuster like the conventional one, it is difficult to operate and lacks reliability.

Therefore, the purpose of the present invention is to provide the above-mentioned adjusting device with a relatively large cover that is freely rotatable and interlocks with the improved adjuster, and by rotating the cover, the adjuster and the operating iron can easily perform the rotation-damping force adjustment operation. Another object of the present invention is to provide a shock absorber damping force adjustment device that can be operated reliably.

An embodiment of the present invention will be described below with reference to the drawings.

In the shock absorber, a piston rod 3 is slidably inserted into a cylinder 1 via a piston 2.
The cylinder 1 is divided into two oil chambers 4.5, upper and lower.

An eye 6 is provided at the lower end of the cylinder, and an eye 7 is connected to the upper end of the piston rod protruding from the cylinder, and a shock absorber is interposed between the vehicle body and the wheels of the two-wheeled vehicle through these eyes 6.7. It looks like this.

A vertical hole 8 and a horizontal hole 9 are bored in the piston rod 3 to communicate the liquid chambers 4 and 5 partitioned by the piston 2, and these two holes 8 and 9 form a fixed orifice.

The piston rod 3 protrudes from the cylinder 1 and connects to the upper eye 7.
An operating rod 12 is fixed to the base end 10 via a screw or the like, and an operating rod 12 is rotatably inserted into this piston rod 3 via a bearing 8'. It is rotatably arranged in the vertical hole 8.

The cylindrical body 13 has a plurality of orifices 14a, 14 which are smaller than the horizontal hole 9 and have different inner diameters at positions facing the horizontal hole 9.
b...14n is bored, and the orifices 14a, 14b...14n of this are bored according to the rotation of the cylinder 13.
Any one of them selectively communicates with the horizontal hole 9, thereby making it possible to adjust the oil passage area to correspond to the orifices 14a, 14b, . . . , 14n.

The base end 10 of the eye 7 is formed in a semicircular shape.
A horizontal hole or space 15 is formed in the eye 7.
A mounting hole 16 is provided in itself.

A screw hole 17 into which the piston rod 3 is screwed, a gear support hole 18 at the end, and a detent 11 are bored in the center of the base end 10.

(Figures 4 and 5) The hole or space 15 in the eye 7 has an adjuster 19.
is rotatably inserted, and teeth 20 forming a gear are provided on the outer periphery of the adjuster 19, and an idler gear 21 is rotatably supported in the gear hole 18, and the outer circumferential teeth 22 of the idler gear 21 are A skirt-shaped cover 23 is rotatably supported on the outer side of the eye base end 10 and the idler gear 21 and meshes with the teeth 20 of the adjuster 19. When the cover 23 is manually rotated, the adjuster 19 is rotated via the idler gear 21.

Examples of the adjuster 19 are shown in FIGS. 6 and 7, but the shape is not limited to this.

That is, the plate body 25 is welded to the body of the adjuster 19, holes 26 and 27 are bored in these bodies and the plate body 25, and the holes 26 and 27 are
．． The top of the operating rod 12 is inserted into 27 so that the adjuster 19 and the operating rod 12 rotate together,
Also, a plurality of positioning notch holes 2B are provided at the peripheral edge of the lower surface of the plate body 25.
A detent ball 29 interposed in the detent hole 11 of the eye proximal end 10 selectively fits into one of these notch holes 28 to position the adjuster 19.

It can also be used even if the adjuster 19 body and the plate body 25 are integrally molded.

A disk-shaped washer 30 as shown in FIG. 8 is disposed on the top surface of the idle gear 21 and the cover 23, and the eye base end 10 is inserted into a semicircular hole 31 formed in the washer 30. ,
The washer 30 is held by a C-shaped or similar snap ring 31 fixed to the eye base end 10, thereby preventing the cover 23 and idler gear 21 from coming off.

A horizontal or inclined display surface 32 is provided on the back of the cover 23.
, and symbols 33 are written on the display surface 32 at equal intervals, and irregularities 34 are provided on the outer periphery of the cover 23 to facilitate rotational operation.

(FIGS. 9 and 10) The adjuster 19 and the operating rod 12 rotate twice as much as the cover 23 rotates due to the gear pitch.

Therefore, when the cover is rotated 180 degrees, the adjuster 19 rotates once.

For this reason, position 33 is located at the notch hole 28 of the detent mechanism.
If the notch holes 28 and the orifices 14a...14n are displayed in correspondence with the positions of the holes 14a...14n, the notch hole 28 and the orifices 14a...14n will return to their original positions just by turning the cover 23 half a turn. If you want to obtain a damping force that can reduce the operating angle of the cover, use the arrow 35 provided with this symbol 33 on the washer 23, since this symbol 33 corresponds to the orifice 14a...14n. It can be adjusted freely from the outside by simply adjusting it.

A vibration-proof cushion member 36 is provided on the lower surface of the cover 23, and an outer end portion of a seat 37 is provided below the cushion member 36.

The base end of the sheet 37 is held on the lower surface of the eye base end portion 10,
Further, the upper end of a suspension spring 38 is supported on the lower surface of the seat 37, and the load of the suspension spring 38 is carried by the eye 7 via the seat 37.

Therefore, the load of the suspension spring 38 is
This does not act on the cover 23, and the cover 23 can be rotated with a light force without interfering with the suspension spring 38.

Since the cover 23 transmits its rotational force to the operating rod 12 via the adjuster 19, the cover 23 and the adjuster 19 are connected by pins, splines, or other connecting members or interlocking elements instead of using a gear mechanism as described above. It can also be used if the cover 23 is connected via a mechanism, and when the cover 23 is rotated, the adjuster 19 is also rotated in conjunction with this.

As described above, in the damping force adjusting device of the present invention, when the reference numeral 33 is aligned with the arrow 35, the gear 21 is adjusted according to the rotation angle of the cover 23.
When the waist adjuster 19 rotates, the operating rod 12 and cylinder body 13 that are integral with it rotate.
Orifice 14a provided in rotating waist cylinder body 13...
14n faces the horizontal hole 9, and a damping force corresponding to the orifice can be obtained, and if it is desired to select another orifice position, the cover 23 can be rotated according to the reference numeral 33.

In this case, since the radius of the cover 23 is relatively large, manual operation is easy and reliable, and fine adjustment is possible.

Furthermore, the adjuster is rotatably inserted into the space provided at the base end of the eye, and the load of the suspension spring is carried by the eye itself, so the load of the suspension spring does not act on the adjuster. The load of the suspension spring does not act on the

Therefore, the cover does not interfere with the suspension spring and can be rotated with light force.

[Brief explanation of the drawing]

The attached drawings relate to one embodiment of the present invention, and FIG. 1 is a partially cutaway vertical side view of a shock absorber, FIG. 2 is an enlarged vertical side view of a drive section in a damping force adjustment device, and FIG. 2 is a plan view, FIG. 4 is a partially cutaway sectional view of the eye, FIG. 5 is a front view of FIG. 4, FIG. 6 is a longitudinal side view of the adjuster, and FIG. 7 is a plan view of FIG. 6. , FIG. 8 is a plan view of the washer, FIG. 9 is a plan view of the cover, and FIG. 10 is a longitudinal sectional side view of FIG. 9. 3... Piston rod, 10... Eye base end, 12... Operating rod, 14at 1
4b...14n...Orifice, 15
...Space, 19...Adjuster, 20
．． 22.24... Gear, 21... Idle tooth L23... Cover, 30... Washer, 33... Code, 35... ...Arrow.

Claims (4)

[Scope of utility model registration request] (1) The operating rod is rotatably inserted into the piston rod, one of the orifices is selected by rotating the operating rod, the base end of the eye is fixed to the piston rod, and the load of the suspension spring is applied. In the shock absorber carried by the eye, an adjuster interlocking with the operating rod is rotatably inserted into a space provided at the base end of the eye, and the adjuster and the adjuster are arranged around the outer periphery of the base end of the eye. A damping force adjustment device for a shock absorber that is linked with a cover. (2) The damping force adjusting device for a shock absorber according to claim 1, wherein the adjuster and the cover are interlocked by gears. (3) The damping force adjusting device for a shock absorber according to claim 1, wherein the adjuster and the cover are connected by a pin or a spline. (4) Damping force in the shock absorber according to claim 1, in which a washer is held above the cover, a code corresponding to the orifice is provided on the cover, and an arrow for selecting the code is provided on the washer. Adjustment device.