JPS5954836A - Damping force adjusting mechanism for hydraulic shock absorber - Google Patents

Abstract

PURPOSE:To absorb a twist in wiring to almost nothing and thereby prevent the occurrence of any adjusting display's misindication on a remote control unit, by making an engaging part between an adjuster rod and a wire have some play, in case of a mechanism rotating and adjusting the adjuster rod from the remote control unit via said wire. CONSTITUTION:Inside a piston rod 2, an adjuster rod 8 is inserted through as free of turning round, while an orifice plate is engaged with the upper end part of the rod 8. At the lower end face of the adjuster rod 8, four pins 16 are projectingly installed in an equiangular pitch and orthogonally engaged with a pin 20 installed projectingly in a rotor 19. This rotor 19 is coupled with a remote control unit via a wire 21. Since there is some play at a 90 deg. pitch in the engagement between the pin 16 and the pin 21, when a twist in the wire 21 is produced, the twist can be effectively absorbed so that an adjusting display on the remote control unit will not show a misindication any longer.

Description

DETAILED DESCRIPTION OF THE INVENTION Fourthly, the present invention relates to an improvement of the damping force adjustment mechanism of the oil shock absorber so that the generated damping force kmAl can be adjusted by remote control.

The damping force of a hydraulic shock absorber is generated by the flow resistance when the hydraulic oil inserted into the cylinder passes through the oil path, and therefore the damping force of the hydraulic shock absorber is generated by the flow resistance when the hydraulic oil inserted into the cylinder passes through the oil path. By changing +'t k, the oil flow resistance also changes, and the generated damping force can be adjusted arbitrarily from this. Various mechanisms for adjusting this damping force have been proposed so far. For example, an adjustment rod is rotatably inserted into a hollow piston rod, and an orifice plate provided at the end of the adjustment rod is rotated. A system has been put into practical use in which the diameter of the orifice is selected and the flow resistance of the oil and the generated damping force are fully adjusted.

By the way, when a hydraulic shock absorber equipped with a complete adjustment mechanism of this kind is applied to a vehicle, it is required to make one-time adjustment by remote control to facilitate the adjustment work, and various one-time mechanisms have been proposed. Ru.

As this type of remote control mechanism, one is known in which a gear mechanism is provided on the adjustment rod section and the gear mechanism and the remote control section are connected by a wire.
,,,.

However, in this type of mechanism, there is a slight play of 7 in the meshing of the same gear in the upper gear mechanism. Me, remote control unit 7. Face the die-1, 2, and turn it 0, n, 11.
．． 15. When the dial is rotated fully, the dial is reversed by the amount of wire σ and twist, which causes an inconvenience when 11 is displayed on the remote control unit.

The invention makes effective use of the inconvenience caused by JQ'F.
The purpose of this is to provide a pin protruding from the end face of the just rod facing outside the cylinder, and to attach one part of the rotating body that is rotatably supported between the pin and the shock absorber body. By engaging the hinges protruding from the end face in a completely orthogonal manner, and by connecting the rotating body, the remote control unit, and all the wires with the trowel, the following is achieved by the play that exists in the connection. This absorbs the twist of the wire to the f1 effect and always provides a positive adjustment display.

A preferred embodiment of the present invention is attached below (-=℃ based on J drawing)
・No detailed explanation 4).

Figure 1 is a partially cutaway side view of the hydraulic shock absorber, Figure 2 □■:i
Fig. 1 is a view in two directions as seen from the arrows, Fig. 3 is a view of part A in Fig. 1, with scratches, odd-, . It is an explanatory diagram of the action of the pin mechanism, and 2,!
, Figure 5 is □4th ``it,: J, View of arrow 5 force direction□
There is.

In the hydraulic shock absorber shown in FIG. 1, 1 is a cylinder, and a hollow piston rod 2 faces inside the cylinder 1.
A piston 3 is attached to the upper end of the piston rod 2 and is fitted into the cylinder 1 so as to be slidable up and down. A rod guide 6 is fitted on the inner periphery of the lower part of the cylinder 1 and is provided with an oil seal 5 that slides on the outer periphery of the piston rod 2. is closed by the lid member 7.

The inside of the cylinder 1 is divided by the piston 3 into an upper working chamber S and a lower working chamber S2.
There is hydraulic oil in S2.

By the way, as shown in the figure, an adjustment rod 8 is rotatably inserted into the piston rod 2, and an orin plate 9, which is housed in the base member 4, is attached to the upper end of the adjustment rod 8. They are inserted and engaged to rotate together. The second orifice plate 9 is provided with a number of orifices (&:t 4 in this embodiment) of different diameters.

A plate 10 (□) is fitted onto the inner periphery of the upper part of the case part 4, and the orifice plate 9 is bored in the plate 11 (1). 5%l, ,f,%,,h An oil hole 10a is drilled to fit the - of the refill, li,C
There:. Also, the upper part of the adjustment rod 8 is formed to have a small diameter as shown in 11 θ], and the piston rod 21 is connected to the upper part of the adjustment rod 8.
A gap .DELTA.S has been formed at fil', and a gap .DELTA.SV: and a communicating oil hole 2a are drilled in the 1l11j portion of the piston 11 and 2.

On the other hand, an under plug 11 is connected to the lower end of the piston rod 2 as shown in the figure, and a lower spring receiver 12 is supported on the under plug 11. As shown in the figure, a coil spring 14 is stretched between upper spring receivers 13 fixed to the outer periphery.

By the way, a space S is formed in the under bracket 11 as shown in FIG. 3, and the lower end large diameter part 8a of the adjustment rod 8 faces the space S while being supported by the support shaft 15. Four pins 16 are protruded from the lower end surface of the aji-strod 8 on the same circumference and at equal angular pitches (90° pitches).・In addition, a single ball 18 is engaged with a plurality of grooves provided on the outside and circumference of the large diameter portion 8a of the adjustment rod 8 by a spring 17 embedded in the under bracket 11. ]・Rod 8. You can feel a click in the rotation.

Also, a rotary body 19 is supported within the bracket 11 by a rotatable member 1, and one pin 20 is attached to the end face of the rotary body 19 on the side facing the space S. -0 is set protrudingly ℃
Therefore, this bin 20゛-9-Jl-〇 and the above-mentioned bin 16 provided on the adjustment rod 8 side are directly engaged with each other.
are doing. This rotary body 19 is connected via a wire 21 to a bundle spacing operation section 30 (which is provided separately from the shock absorber main body shown in FIG. 1).

In the remote control unit 30, inside the case 31 there are rotatably housed people 41 and small gears 32 and 33 that mesh with each other.
．． As shown in FIG.
+? '# Show・i・] The two dials 34 are connected to rotate together, and the pinion shaft 33a is attached to the small gear shaft 33a.
(2) The end of the wire 21 is tied at 10°C.

Merchant, small gears 32.33 teeth] l, 11; &. 1
The tail is arranged so that when the float 32 rotates once, the small gear 33 rotates by ] degrees.

Next: 1i5a Akira 1 damping force adjustment mechanism ()J
Fl J'll will be described as follows.

If the dial 34 is rotated once and the display is changed from, for example, "2" shown in the figure to 13-1, the human mountain lj, 32 will also rotate once, and at this time, the small +'# -113314:
In relation to the number of teeth 1hi mentioned in iit, it is turned by 111η, and this part of V-21 is also turned by 1.

Furthermore, one rotation of this wire 21 also causes one rotation of the rotating body 19 connected thereto, and one rotation of this rotating body 19 causes the pin 20 protruding from this to move the adjustment rod 8 as shown at 20-1 in FIG. Push one of the four θ pins 16 16-1ffi protruding from the shaft to rotate the adjustment rod 8 once. Adjustment [j Rad 8 rotates once, stops at this point, and does not rotate J゛ thereafter.

By the way, during the shock absorber's extension stroke, the piston 3
moves downward relative to the cylinder, a portion of the hydraulic oil in the lower working chamber S2 flows through the oil hole 2a provided in the piston rod 2, the gap ΔS, the orifice of the orifice plate 9, and the oil hole 10a of the plate 10. It flows into the upper working chamber Sl through the orifice etc., I! A new damping force is generated in the shock absorber due to the flow resistance of the oil when passing through i1.

, 1. Therefore, as described above, when the adjustment rod 8 rotates once, the orifice plate 9, which rotates together with the adjustment rod 8, is provided with the orifice selection, that is, the plate 1.
Selection of an orifice compatible with the oil hole 10a of 0 is made,
For example, if all large-diameter orifices are selected, the flow resistance decreases and the generated damping force (J) is also reduced, whereas if small-diameter orifices are selected, the flow resistance increases and the generated damping force also increases.

After adjusting iLl+ <, the wire 2111C- is twisted, but the pin 16, pin 20, -2-4
Since there is a play of 900 pitches in engagement with the wire 21, the wire 21 rotates further by the amount of twist while the adjustment rod 8 and dial 34 move by 71%. , -S-, the twist of the wire 21 is effectively absorbed by J and V. As a result, the dial display on the remote control unit 30 always remains accurate, and the rotation of the dial 34 and the rotation of the adjustment rod 8 correspond to (j'1:1, so there is no error in the rotation of both persons.
.

In this embodiment, the adjustment is performed in four stages: 1, 1. - Related Bin 1
The number of pins 11j may be the same as the number of adjustment stages, and the number of pins 11j is not limited to four.

As is clear from the above explanation, the tree 'je'! II kc
, J, a pit is provided at the end of the adjustment rod 7, and the pin and the pin projecting from one end surface of the rotating body are supported so as to be movable together with the shock absorber body. At the same time, since the rotating body and the remote control unit are connected with a wire, the twist of the wire is effectively absorbed by the play that exists in the engagement of the pin. can be achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway side view of a hydraulic shock absorber, FIG. 2 is a view taken in two directions as seen from the arrow in FIG. 1, and FIG. 4 and 5 are explanatory diagrams of the operation of the adjustment mechanism according to the present invention, and in particular, FIG. 5 is a diagram of the 41st section cut away in five directions. In the drawings, 1 is a cylinder, 2 is a piston rod, 3 is a piston, 8 is an adjustment rod, 9 is an orifice plate, 11 is an under bracket, 16.20 is a pin, 21
is a wire, 30 is a 1-ton operation section, 32 is a large gear, 33
is a small gear, 34 beams and one ear. Patent applicant: Showa 111 Seisakusho Co., Ltd.

Claims (1)

[Claims] Fits freely into the cylinder ・'1. Insert the adjustment rod into the hollow piston rod that supports the piston at one end so that it can rotate freely, and change the oil passage area in the cylinder by rotating the adjustment rod.
This causes the generated damping force to be adjusted to 'J+It-.In the damping force adjustment mechanism of the Muni oil-hammer shock absorber, a bottle is provided protruding from the other end face of the adjustment rod facing outside the cylinder, and the bottle and the shock absorber body are connected to each other. A bottle protruding from one end surface of a rotatable body that is rotatably supported. A damping force adjustment mechanism for a hydraulic shock absorber, characterized in that the rotating body and a remote control section provided separately from the shock absorber body are connected by a wire.