JPS5932506A - Vehicle damper adjusting device - Google Patents

Abstract

PURPOSE:To automatically control damping force in accordance with the adjustment of load of a damper spring, in a vehicle damper for the rear wheel of a motorcycle, by disposing a cam mechanism between an attaching member of the damper and the damper spring so that an adjusting element in the damper is frictionally engaged with a variable orifice adjusting element. CONSTITUTION:By rotating an adjusting fixture 25 to adjust the initial load of a damper spring 22, a frictional ring 34 engaged with the adjusting fixture 25 is rotated and therefore, an adjusting ring 33 also rotates, following the rotation of the fixture 25. Since the adjusting ring 33 is engaged by a thread with the outer periphery of a second attaching member 3, the adjusting ring 33 axially moves as it rotates. This movement is accompanied by a rod 12c through a pin 33c. Thereby, a needle valve 12 is opened and closed to adjust damping force by means of working fluid passing through a center hole 6e. With this arrangement, the adjustment of damping force is automatically made in accordance with the load setting of the damper spring.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a vehicle shock absorber that is suitable for the rear suspension of a motorcycle J171 (A), and is sometimes applied to the rear suspension of a motorcycle. The damping force can be set and fixed individually, and the damping force can be automatically set according to the initial load setting of the buffer spring.

Conventionally, in the loose lj device for motorcycle JLR, the power i=t
It is known that the initial load setting of the loose spring can be freely adjusted depending on the roughness of the road surface and the roughness of the road surface by 1λ°C (for example, Japanese Utility Model Publication No. 43-28257).

Further, there is also known a device in which the setting of the damping force can be freely adjusted depending on the magnitude of the impact received from the road surface (for example, Publication No. 39131(')l).

In general, the initial load of a buffer spring is 1 knot! Although it is often done depending on the amount of the shock absorber, the adjustment of the loose Qij spring can be done, for example, by shortening the initial length of the buffer spring when the load acting on the damper increases. 1! Since the S claw is set to be large, it is preferable to increase the damping force at the same time so that the damping force is also adjusted at the same time so that the vibration convergence is not delayed.

This invention has been made based on the above observation, and involves engaging the adjuster of the cam mechanism and the adjuster of the purple orifice through a frictional engagement means, and damping the damping according to the increase/decrease in the set load of the buffer spring. It is distinctive in that it is linked so that the force increases and decreases.

The present invention will be explained below with reference to illustrated embodiments. Reference numeral 1 denotes a heavy-duty hydraulic shock absorber υ, which has a first mounting member 2 and a second mounting member 3 made of aluminum alloy, which are mounted on the vehicle frame side or wheel side. It has 4.

In the first mounting member 2, the cylinder 6 of the damper 5 and the pressure tank γ are integrally formed by die-casting, and these are communicated with each other through an oil passage 9 formed in one leg 8.

Pressure tank 7), 1. By covering the opening at the top end with the lid 7af, 'IB i! J, and its interior is divided into an air chamber 7c and an oil chamber γd by a free piston 7b. 7e is the lid 7a VC-equipped soft gono-shaped U
A syringe is inserted through the stopper made of air, and about 3 kr/α2 of compressed air is injected.

The cylinder 6 of the damper 5 is sealed by covering it with a lid 6a, and the inside is closed by a piston 11 with two wheels (ib,
It is divided into 6c. 6d is a piston rod, one end of which is caulked and fixed to the piston 11, and the other end is screwed to the second mounting member 3 with a screw provided on the outer periphery. The piston rod 6d has a cylindrical shape, the center hole 6e is stepped, and a needle valve 12 is provided in the large diameter portion. The needle valve 12 has a valve body 1 having a tapered tip.
2a, the valve seat 12b press-fitted into the large diameter part, and the empty υ,
The opening degree of the valve body 12a is controlled by an elongated rod 12c.

Reference numeral 13 denotes an oil passage formed in the piston 11, and passage resistance is applied by a valve body 13a made of an annular spring piece to attenuate the reciprocating energy of the piston 11. 14-, a damper for the piston 11 loosely coupled to the piston rod; 1
This is a sta spacer and prevents the small hole 12d that communicates with the valve body 12n from being drawn into the stopper 13. 16i-1 A known shock absorber for regulating the retraction limit of the damper 14; 21 is a spring seat υ of a buffer spring 22, and there is no buffer between the spring seat 23 loosely engaged with the outer periphery of the second mounting member 3; 22.

A cam mechanism and each adjuster of the variable orifice are provided on the outer periphery of the second mounting member 3.

The mechanism is composed of a cam member 24 and a support protrusion 2G provided on an adjustment fitting 25 serving as an adjuster thereof. That is, the cam part is formed into a cylindrical shape with several steps 2T divided by small protrusions 27A, as shown in Fig. D85, and has an elongated hole 28 and an oval-shaped key 29.
Due to this, it is impossible to rotate on the outer periphery of the mounting member 3.It moves in the axial direction! 'llll1■ J Noh has approved←). The spring seat 23 is formed integrally with a cup/portion 24. The 81η metal fitting 25 is die-cast from an aluminum alloy and integrally wraps the steel plate support protrusion 26. The support protrusion 26 is fixed to the outer periphery of the IH which can only be rotated, and by rotating the adjustment fitting 25, the support protrusion 26 can be selectively applied to any of the steps 27 of the force J/portion 24. Supports a pressing force of 22. 31(/:1
m cover, and four axial grooves 31n provided on the inside.
and 11 protrusions 2 provided on the outer periphery of the spring seat 23.
3a, it is unrotatable due to engagement with ring 31b, and ring 31b
31cij: Position display mark. That is,
As will be described later, the cover 31 does not rotate even when the strength of the buffer spring 22 is adjusted by rotating the adjustment fitting 25, and remains immovable relative to the second mounting member 3, and the position indicating mark 31c attached thereto does not rotate. According to the adjustment fitting 25,
You can know.

Reference numeral 33 is a knob ring which is a variable orifice adjuster, and is screwed onto the outer periphery of the second mounting portion 3.

An unevenness 33n in the direction b is formed on the inner surface of the end of the adjustment ring 33, and the protrusion 34a of the friction ring 34, which is loosely restrained by the adjustment fitting 25, is loosely engaged with and detachable from the buffer spring 22. W”A Tsutsugane J”I’! When the adjustment ring 5 is rotated, the adjustment ring 33 is also rotated. Adjustment ring 331-,
J: The υ bottle 33c is supported by the inner wall of the cylindrical part 33b protruding from the inside thereof, passing through the hole 3d perpendicular to the axis of the second lever 3, This supports the end of the rod 12c. That is, rod 1
2c tti Regulates the retraction limit of the valve body 12a of the needle valve 12 which is retracted by hydraulic pressure.

35 is a rubber-like stopper, 36 is a rubber-like cover passed between the ring 25a and the adjustment ring 33, and 37 is an oil seal for the rod 12c.

The operation of this embodiment will be explained. When the distance between the first part 2 and the second mounting part 3 changes due to vehicle vibration, 1
．． Wi11ii Gene22 expands and contracts and decreases with Konoshi:
[The piston 11 of the BP 5 reciprocates inside the cylinder 6, and the effects existing on both sides of the piston 11 1) Oil pump xlr, 1lil+ are passed through the center hole 6a provided in the oil passage 13 and the piston rod 6d. Hydraulic oil C", Part 1y
y, 5 valve body 13a ('', needle valve 12, t: -:)
-U 7 [A constant attenuation can be seen.

At this time, the oil of the piston 1 (d) enters and exits the cylinder 6 through the oil passage 9, enters and exits the pressure counter γ, and passes through the tree piston 1b to the air u7.
Expand c to a pressure of l [11. In other words? j! Air chamber 7
c acts as an air spring.

Next, the coinage of this loose 111ij volume]) method is removed from 14F.
do. First, adjust the buffer spring 22;
・1. Perform with the adjustment metal fittings 25. -1, r'
Now, adjustment fitting 25? I: When rotated, spring seat 7
Since the 3i key 29 holds the υUn two positions at the number 3, only the support protrusion 26 rotates 1υ, and when the machine A1 turns 24f, the other parts of the several substitute parts 27 turn off. When the stage is selected, the distance between the J section catch seats 21 and 23 changes, and the shock absorber 22
can be compressed or expanded to adjust the initial load. Incidentally, it is convenient to use the position display marks marked on the cover 31 during the work, as adjustment 1.1 can be easily and easily understood.

The damping force is adjusted by rotating the adjustment ring 330. That is, since the adjustment ring 33 is screwed onto the outer periphery of the second attachment part 3, it moves in the axial direction as it rotates. bottle 3
3c nj, 'Accordingly, 1[ill L, ,j7.1 part of the rod 12c pressed against its side is moved. In this way, the needle valve 12 is opened and closed, and the magnitude of the drop 1-f generated in the hydraulic oil flowing through the center hole 6e can be adjusted to be large or small.

Here, to set the cliff of the initial load of the buffer spring 22 and the 9th node,
: When you rotate the ff1 knob 25, it will be inside☆if
The friction ring 34, which is engaged with 34b, follows, and the C'A node limp ring 31 is rotated by its protrusion 34a.

That is, when the initial load of the buffer spring 22 is operated to increase, the damping force also increases at the same time. In addition, when the adjustment ring 33 is rotated, the adjustment fitting 25 does not rotate. That is, the adjustment fitting 25 is set by the friction ring 34 so that the cam member 24 engaged by the support protrusion 26 does not rotate with respect to the second mounting member 3.
This is because the force ≧ is much smaller than the force with which the support protrusion 2G resists the pushing force of the buffer spring 22 and overcomes the small protrusion 27a.

As shown in this invention (1 and above), there is a number of extra editions on the car frame 1111 (and an extra edition on the wheel side), !
In the GF device, a cam I114+'i is installed between one side of the J1 spacing part 4-(and the buffer spring), which has a hydraulic damper and a Motonoshitsu J spring between the old and old models. The l!'73 joint of the IAHr't and the H1 joint of the variable orinois are held together by means of engagement means with a thickness of t. 1st adjuster
If you make 'Paj section F'i, then follow SoJl 〒iJ' 2
Published Riff 1st's 51ε Setsuko is also connected and refined "Off 1"
-The first time when you earn 5 yen per salary 1)・'f Increase the weight 1;,I
〒T, decreases at 1 o'clock y [force is also connected to υ, and 1°; f1 is added,
If the initial load is reduced, the damping force will also be reduced at the same time, generally resulting in a better ride quality and easier adjustment. Bitten, cut, suppressed! Since the gPi nodes of j and V and the adjuster of the variable orifice are only in frictional engagement, the initial load of the buffer spring and the adjustment of the damping force can be adjusted by Jl alone, as in the conventional case. ).

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view of the buffer, FIG. 2 is a side view of the shock absorber, FIG. IV in Figure 3
-IV sectional view, Fig. 5 is a front view of the main part, Fig. 6 is the o■-vt cross section IX+, 7th lr/l +, l
In Fig. 5 (this is a sectional view along D■l-■). 1. Hydraulic shock absorber, 2.
...Second mounting part old, 5...Attenuator, 6 a e
@11 cylinder, 11 @---piston, 22...
...Buffer spring, 25...8ζ11 knot fitting, 33...
...Adjustment ring, 34...Friction ring. Patent applicant: Yamaha Motor Co., Ltd. Agent: Masaki Yamakawa (and one other person)

Claims (5)

[Claims] (1) I'τ11 to give consent to the vehicle frame side ;(:
(It consists of a cylinder and a piston fitted into the cylinder between the wheel and the blade for mounting on the side, and one side and the other side in the cylinder divided by the piston are n ``A shock absorber for a vehicle comprising a damper communicated with a communication passage having a variable orifice, and a buffer spring stretched between both members, wherein one of the above-mentioned members J and the buffer spring are provided. A cam mechanism +79 is interposed between the cam mechanism +79 and the adjuster of the cam mechanism and the i!''1 node of the variable orifice 79 are engaged via a frictional engagement means to adjust the set load of the shock absorber. FJ='!I?ii' device for a vehicle shock absorber that is interlocked so that the damping force increases or decreases according to the increase or decrease. (2) The cam mechanism is rotatable to the outer periphery of one of the supporting members. (3) IIJ variable angle adjustment adjuster - above installation 1ll
s to one outer circumference of the fourth 1i1. ＋Freely attached J to Tsukasa Kidney 'l' F, 't! Scope of Requirement: The n-way joint device for a vehicle shock absorber according to item 1. (4) Kakre11 i7,7! I'1 Setsuko and T)u
The regulator of the variable orinois is the same as the previous YH2 inquiry!
++ Rotate to the outer periphery of the fourth one.
A method for manufacturing a surrounding part of a vehicle shock absorber according to claim 1. (5) The frictional securing means is composed of a 7-barrel interposed between the adjuster of the mechanism and the adjuster of the variable orifice. 1st
] I Ryokawa Yurui (6-chop tool made by ITSUBU 9!).