JPS599330A - Damping force adjusting device of hydraulic shock absorber - Google Patents

Abstract

PURPOSE:To confine the damping force adjusting range of a hydraulic shock absorber within a range easily adjustable by general use by a structure wherein a controlling ring, the pivotable range of which is controlled by a stopper, is fitted onto a controlling nut. CONSTITUTION:An orifice 9, which axially pierces a piston fitted in a cylinder with oil sealed therewithin, and a needle valve 10, which adjusts the opening of said orifice 9, are provided. Damping force is adjusted by threadingly moving the controlling nut 15 threadingly fitted to a piston rod 8 at its outside end through a push rod 11 piercing the center axis of a piston rod 8 so as to move the needle valve 10 in order to adjust the opening of the orifice 9. The controlling ring 16, which allows the change of the relative angle with the axis center of said controlling nut 15 as a center, is fitted onto the controlling nut 15 and at the same time the pivotable range of the controlling ring 16 is controlled by the stopper 17 within a certain fixed range.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a shock absorbing force adjusting device for hydraulic pressure (a).

Hydraulic shock absorbers used in motorcycles, especially those used for rear wheels, generally have a piston fitted into a cylinder filled with oil, an orifice that passes through the piston in the axial direction, and an opening degree of this orifice. A needle valve is provided to adjust the opening degree of the orifice, thereby controlling the passage of oil and adjusting the buffer force. Adjustment of this needle valve can be performed from the outside via a bushing rod that passes through the axis of the piston rod by threading an adjustment nut screwed onto the outer end of the piston rod. be.

However, the adjustment of the needle valve using this adjustment nut is very delicate, and when it is performed by an amateur general user to adjust the entire structure of the compiler, it may sometimes be difficult to restore the original correct state. It can be difficult.

SUMMARY OF THE INVENTION In view of the above-mentioned problems, an object of the present invention is to provide a force adjustment device for a hydraulic shock absorber that can be easily handled by general users.

To achieve the above object, the present invention includes a piston fitted into a cylinder sealed with oil, an orifice penetrating the piston in the axial direction, and a needle valve for adjusting the opening degree of the orifice, and the needle valve is connected to the piston rod. The axis of IJm
In adjusting the buffering force of the hydraulic damping capacity, which is finely adjusted by screwing an adjusting nut screwed onto the outer end of the piston rod through a bushing rod, the adjusting nut is set so that its axis is aligned with the shaft center. The special feature is that an adjustment ring that can change the relative angle of the adjustment ring is fitted, and the range in which the adjustment ring can be rotated is restricted to a certain range by a stopper.

The present invention will be explained below with reference to an embodiment of a hydraulic pressure balance device provided in a motorcycle shown in the drawings.

In FIG. 1, 1 is a main frame, 2 is a rear arm, and 3 is a rear wheel. Between the rear part of the main frame 1 and the upper end of the rear arm 2, there is a continuation of the A11ii force adjustment device according to the present invention.

As shown in detail in FIGS. 2 to 4, the cylinder 5 constituting the balancer 4 has a free piston 6 fitted therein, and has an oil chamber 5a filled with oil and a gas filled inside. It is divided into a gas chamber 5b. A piston 7 is fitted into the oil chamber 5a side, and the other end of a piston rod 8 connected to the piston 7 extends to the outside of the cylinder 5.

The piston 5 is provided with an orifice 9 passing through it in the axial direction, and a needle valve 1° faces the orifice 9 to define a constant opening degree. ff of needle valve 10! The end portion is connected to a bushing rod 11, and this bushing rod 11 passes through the axis of the piston rod 8 and reaches the end portion.

A cane piece 12 is screwed and fixed to the outer end of the piston rod 8. Elongated holes 13, 1 are provided on both sides of the cylindrical piece 12.
3 is bored, and a horizontal pin 14 is movably inserted along this elongated hole 13. An adjustment nut 5 is screwed onto the outer periphery of this cylindrical piece 12, and the inner side surface of this adjustment nut 15 is brought into contact with both ends of the horizontal pin 14.
The central side surface on the opposite side of 4 is brought into contact with the end of the bushing rod 11. Therefore, when the adjusting nut 15 is adjusted by screwing, the bushing rod 11 is moved through the needle valve 14 to the needle valve 1.
By changing the position facing the orifice 9, the opening degree of the orifice is adjusted.

The outer periphery of this adjustment nut 15 has a large number of recesses 1 at equal intervals.
5a, and a groove 15b is provided along the outer peripheral end surface. A resin adjustment ring 15 is removably fitted onto the outer periphery of the adjustment nut 15.
Turn! By operating the needle valve 10, the adjustment nut 15 can be rotated together to create the opening degree ff1l of the needle valve 10. That is, the adjustment 116 made of wood has a convex Eill i 6 a on the inner peripheral side that can selectively fit into one of the recesses E i 5 a of the adjustment nut 15, and a convex Eill i 6 a on the inner peripheral end surface. Concave groove 15 of adjustment nut 15
It has a protrusion 16b that fits into the ring 16b, and also has a ring 16c on a part of the ring part. Therefore, key ii+
ix etc. over the outside of the adjustment nut 15 by pushing out the slit 16c, and then inserting the convex part 16a into the concave part 15a.
In addition, the convex strip 16b is fitted into one of the convex parts.
By fitting the sleeve 1415b and returning the sleeve 16c to its original state, the amount can be fixed to the adjustment nut 15.

Further, a cutout recess 16d of a certain length is provided on the outer peripheral side of the adjustment 1116, and the stopper 17 faces this cutout recess 16d. This stopper 17 is fixed on a plate 1B that is fixed unrotatably to the cylindrical piece 12. Therefore, the rotation 1j of key lfI ring 16
@The circumference is limited by the stopper 17, and the notch recess 16
It can only rotate by an angle corresponding to the length of d. Therefore, the adjustment of the opening degree of the orifice 9 by the needle valve 10 is performed by the adjustment ring 16. It will be limited to the surrounding area.

This fine adjustment in the range 171 can be made by looking at the relative position between the alignment mark 21 provided on the plate 1 and the adjustment IJl ring 15.

20 is a spring stretched between the plate 17 and the spring receiver 19 fixed to the cylinder 5 side, and 22 and 23 are mounting brackets, respectively.

Now, according to the above-described device, unless the adjustment ring 15 is removed from the adjustment nut 15, the adjustment range of the opening degree of the needle valve 10 by the adjustment ring 16 is limited to a certain range. Therefore, the position of the adjustment nut 15 should be determined by the manufacturer or a specialized maintenance shop, and by limiting the adjustment range that can be made by the adjustment 1116 to a range that can be easily made by an amateur general user, It can be used as a versatile X-damping force adjustment device for general users. Moreover, the convex portion 16a of the adjustment 116 adjusts the height of the strike 15. Car 1! Damping force adjustment according to yaii! If you choose according to the following, it can be used in a wide range of vehicles depending on the type of car! It can be a damping force adjustment device.

In addition, the adjustment throat 15 and the adjustment throat ii in the above-mentioned embodiment
The relationship between the concave portion 15a and the convex portion 16a and the concave groove 15b and the convex line 16b between the fifth ring (2) may be reversed. Further, although the kneel valve 10 and the bushing rod 11 are connected in the embodiment, they may be separated from each other and only in contact with each other.

As described above, in the present invention, a piston is fitted into a cylinder sealed with oil, an orifice passing through the piston in the axial direction and a needle valve for adjusting the opening degree of the orifice are provided, and the needle valve is connected to the piston rod. The axis of I! lj
Hydraulic pressure is finely adjusted by threading an adjustment nut screwed onto the outer end 1M+1 of the screw F-n rod through a bushing rod that passes through the bushing rod. In the J*7 force adjustment device,
Said iI! An adjustment ring whose relative angle around its axis can be changed is fitted onto the i-joint nut, and the rotatable range of the adjustment ring is restricted to a constant range by a stopper, so that the needle valve can be easily adjusted. It becomes possible to adjust the buffering force using the opening [11] only within an easy adjustment range where the tJA joint ring can be rotated, thereby providing a buffering force adjustment device that is easy to imitate for general users. be able to.

Moreover, since the adjustment ring is capable of changing the relative angle of the adjustment nut about the axis, the adjustment range can be changed as desired depending on the type of vehicle.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the main parts of the IIJ motorcycle equipped with a shock absorber having a shock absorbing force adjustment device according to an embodiment of the present invention, and Fig. 2 shows the same balance device in cross section taken along ■-■ in Fig. 3. A cross-sectional view, FIG. 3 is a side view taken in the direction of arrow ■ in FIG. 2, and FIG. 4 is a cross-sectional view taken along IV-IV i! This is a diagram. 4...Kan Ili cod, 5...Cylinder, 7...Piston, 8...Piston rod, 9...Orifice, 10...
・Needle valve, 11. Button rod, 12. It piece, 14. Horizontal pin, 15. Adjustment/strike, 1b.
・Adjustment ring, 15a ・・Concave portion, 16a ・・Convex portion, 17・ ・Stroke ν) (-11B・・Play 10 Agent: Patent attorney Tei Ogawa - Patent attorney: Noguchi Ren Teru Patent attorney: Kazuhiko Saishita Procedure amendment ], Incident Display Showa 57+1 Patent Application No. 115536
”,>2, Title of the invention: Hydraulic shock absorber shock absorbing force adjustment device 3, Person making the amendment/Relationship with ICf'l Patent applicant: 4, Agent: flo Address: 31'11 Nishi-Shinbashi, Minato-ku, Tokyo 105
No. 3 3 C-Pelican Hill 6, correction target CI) i! Correct the size of I in the attached sheet. (Corrected the furigana of the address by the inventor) (2) Yesterday 1F, 210th line 212-13 r & 51 il
About all areas of i-power @Buy” [Section 1 of Natsuto’s 1! i
(over the entire adjustable range)". /, 3) [Correct piston 5-1 to "piston 7" on line 406]. (4) Correct "1 Plate 17" on line 615 to "Plate IBJ". (5) Correct "Ha! 5 Force Reduction ■" in lines 6 and 10 to 11 of page 7 to 1, respectively. (6) "t1 force crest adjustment 1 circumference" on page 7, line 9 is corrected to "hoof balance adjustment range."

Claims (1)

[Claims] A piston is fitted into a cylinder filled with oil, an orifice passing through the piston in the axial direction, and a needle valve for adjusting the opening degree of the orifice are provided, and the needle valve is connected to a bushing rod that aligns the axis of the piston rod. In the damping force adjustment device for a hydraulic loosener, which is finely adjusted by screwing the adjustment nut, the outer end of the piston rod is connected to the outer end of the piston rod. Adjustment ilF that allows you to change the relative angular pressure! Along with inserting the ring,
Hydraulic &!, whose weight is that the rotary range of the adjustment ring is restricted to one foot range by a stopper! I-equilibrium adjustment device for sideware.