JPS5919736A - Adjustment of initial set load on spring in hydraulic shock absorber - Google Patents

Abstract

PURPOSE:To make it possible to select easily a desired initial load on a suspension spring by a method wherein a stepped cam is provided so that the amount of displacement of a drive member in the axial direction is selected at will without enlarging the outer diameter of an entire hydraulic shock absorber. CONSTITUTION:When a fluid pressure is supplied into a pipe 9 and a ram 8 is moved upward by increasing the pressure in a fluid chamber 6, the top end of a stopper 12 urged by a spring 18 falls to come into engagement with the stepped cam 8a from the upper step down to the lower step of the cam in sequence. In this case, when the elevating position of the ram 8 is selected and the pressure of the fluid is released, the downward movement of the ram 8 is checked by the stopper 12 and a spring sheet 10 compresses the suspension spring 11 so that the initial set load on the suspension spring 11 is increased. In case where the load on the spring 11 is weakened, the pressure of the fluid is supplied into the fluid chamber 6 so as to move the ram 8 slightly upward from its set position lest the load on the suspension spring 11 should be applied on the stopper 12, the stopper 12 is disengaged from the cam 8a by operating a knob 20 and subsequently the pressure of the fluid is released.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a hydraulic shock absorber and a four-way adjustment device for the initial setting load adjustment device of the suspension suspension.

As shown in Japanese Utility Model Application Publication No. 53-5948, a conventional method for adjusting the splashing load of this kind of conventional rear suspension unit for two-wheeled vehicles is that an outer tube is extendably arranged around the outer circumference of the cylinder.
15. A splinter is interposed between the spring seat of this Gaisho and the spring holder of the Bi'stone rod, and a plurality of cams are formed in the shape of steps at the upper end of the Gaisho, and a jig is attached to the boss of the Gaisho. After inserting the cylinder and rotating the outer cylinder against the spring, one of the cylinders was fitted to an arbitrary cam, and the spring guide weight was set according to the height of this cam. l11 The rear cushion for two-wheeled vehicles is for one-person and two-person riding (when used, or depending on the weight of the rider, the fitting position of the cam and stopper is determined by 1 to 1), and the rear cushion for two-wheeled vehicles is one core per rider. I think I can set the weight.

Devices using such cams have been widely put into practical use, but in recent years they have been used for auto-high systems.1. The remote measuring hydraulic shock absorber is conventionally used for both the left and right sides of heavy objects! If K, H, and Jl have been put into practical use, a vehicle body structure in which the burden is burdened by a single hydraulic mechanism has been put into practical use. this? ,
J15. 5. The spring constant of the f-frame spring is set to be very high, and its initial setting Idt weight is also set to be high compared to the conventional one.5. Became.

Therefore, when adjusting the initial setting load, the operating force is large and a considerable amount of force is required, resulting in poor workability.Also, since the car body is made of 11mm, even if you try to rotate the cam with a screwdriver, the car body etc. will get in the way. I have lived a long life.

Therefore, to overcome these shortcomings, it is necessary to adjust the length and length of the short link, and the adjustment can be done while riding a two-wheeled vehicle, and the adjustment work is quick and easy. [2] which does not require force due to
Sprinkle load monoton of rear cushion unit for Kanto I
! i+ system (direct development is also old).

However, in the conventional adjustment device J, a stopper is provided protruding from the outer periphery of the housing sink that transmits the ram, and the movement in the C-axis direction is made possible by one hydraulic pressure. It has a configuration in which the sliding cam part that supports the suspension link seat is engaged with its stopper, and this 41 adjusts the position of the splinter seat 7f, that is, the initial setting load of the suspended splinter. As a result, the outer surface of the adjustment part was large, making it difficult to secure enough space for its installation.

The present invention is aimed at improving these conventional drawbacks, and includes a splinter seat that fixes one end of the splinter suspended on the outer periphery of the cylinder, and a ram that is slidable in the 1ljl+ direction. A housing for accommodating the housing is provided, and a fluid pressure is co-supplied within the housing sink so that the splinter sheet can be pressed by the driving member. A stopper is provided, and a step-like cam is provided on either one of the opposing surfaces of the above-mentioned '■ Moving Part' (1). The present invention provides an initial setting 1dj weight adjustment device for a suspended splinter in a small and small diameter hydraulic slow insertion device with a diagonal of 5.

The present invention will be described below with reference to Figures 1 and 2. Referring to the figure, (1) is a hydraulic relaxer, in which a piston is slidably installed in a cylinder (2). It warps against the vehicle body through the flaket (3) and is fixed to it. An outer casing (4) is fitted onto the outer periphery of the cylinder (2). A housing (5) that forms a fluid chamber (6) between the outer cylinder (4) and the housing (5) is fixed around the outer cylinder (4), and a sealing material (7) is installed in the fluid chamber (6) in the housing (5). One driving member having a barrel (8) is slidably housed 11. The outer periphery of this ram (8) is selectively engaged with a stopper (described later).

A filter step-shaped cam (8a) is provided. A fluid pressure supply pipe (9) is connected to the lower part of the housing sink (5) (the right end in the figure) so that fluid can be supplied to the fluid chamber (6) as desired. (10) is Ram (
8) A splinter sheet that is supported on the upper surface and slides on the foreign body (4), and this splinter sheet flQ) K
'JJ (formerly known as the JJ rack sprink)'s - sweeper is seated.

The housing sink (5) is provided with a protruding section (5a) whose tip faces into the cylindrical section (5a) at the outer circumference υ of the ram (8). A stopper that slides in the direction perpendicular to the l-axis (snap rings on 1, 2+ h and
Spring guide (14) fixed by -C with (13)
) or contained. In addition, the spring guide (+4
+) The periphery is a sealing material (
15). (16) is the nodal part (
5a) Remove the base at the end with a snap ring (17) (cable R16 with a hollow cable that has been tightened)
A coil spring (18) is interposed between the end and the submarine bookcase (14), and this always presses the stopper (12) toward the ram (8). (19) is a display board having a scale corresponding to the number of stages of the cam (8a) provided on the ram (8), and is provided with a knob (20) that can move in a straight line according to the scale ((1); This knob (20) and the sublink force point (I4) are connected to the cable (16).
A wire (21) is inserted inside the kite.
By operating this knob (20), the stopper (1a) is moved back by the anti-cam of the spring (18).

Next, the operation of this adjusting device will be described in detail.

In Figure 1, there is no fluid pressure applied to the pipe (9), so the ram (8) is at the bottom of the device, and the Takumi knob (20) and the middle path in the figure are also on the right. When hc is retracted 1t, the stopper ([2) is in the cylindrical portion (5a) against the splinter (18).

At this point, when adjusting the initial load of the suspension spring (11), fluid pressure such as hydraulic pressure or air pressure is sent to the pipe (9) to increase the pressure in the fluid chamber (6) and then the ram (8)
``I raise it twice. Then - along with this upward movement, the stepped cams (8a) successively release the springs (1) from the upper one.
8), the tip of the stopper (12) falls down and becomes unable to engage. Therefore, the amount of movement of the ram (8) is adjusted depending on the magnitude of the fluid pressure, and the cam (8a) By selectively locking the stopper (12) on the step part of the seat fang 1, the 2nd raised position of the ram (8) is selected, and then by releasing the fluid pressure, the 2nd raised position of the ram (8) is selected. 8) is prevented from lowering by a stopper (I2). In this way, as the ram (8) rises, the splinter seat (10) (old back frame spring) is compressed (-), and the initial setting load is increased.

Still, the moving wind of the stopper (12) is still limited to the stopper ([2
), the wire (2) connected to the spring guide (14)
1) This can be confirmed by the position of the knob (20) at the end.

On the other hand, in order to weaken the spring load set as described above, fluid pressure is sent into the fluid chamber (6) so as to raise the so-called ram (8) from the set state, and a force is applied to the stopper (12). Make sure that the load on the sliding suspension spring (old) is not lost, and operate the knob (20) to release the stopper (12).
) from the cam (8a) and subsequently release the fluid pressure. The quail and the ram (8) descend, lowering the carriage of the subrink (old). Please note that the fluid pressure will not be released in stages.''1. For example, the amount of load reduction can be arbitrarily selected.

”・Figure 3 shows another embodiment of the present invention. This is a ram (
No cam is provided around the end of 8), but instead a stepped cam f12a) is provided at the tip of the stopper (12). Although the load of the suspension spring can be adjusted arbitrarily by using the bending structure, in particular, by pushing up the ram (8) by fluid pressure, the cam [] of the stopper (12), the seat of the stopper (2a), etc.! 1. After the crab ram (8) is locked and the fluid pressure is released, no fluid pressure is required to adjust the spring load to a lower level. That is, #r and B adjustments can be made step by step only by retracting the stopper (12).

As explained above, the present invention bτ has a structure that includes a spring seat that locks one end of the W rack spring (on the outer periphery of the cylinder of the hydraulic shock absorber) and a self-stressing spring seat that slides in the axial direction.
A housing sink 4 for housing the driving member is provided, the driving member is moved in the axial direction by fluid pressure supplied and discharged into the housing sink, and a stopper inside the housing is operable to move so as to come into contact with the outer periphery of the driving member. A splinter load is applied to either the stopper or the contact portion of the drive member. By providing a stepped cam that prevents the drive member from descending, the amount of axial movement of the drive member can be arbitrarily selected by operating the stopper and supplying and discharging fluid pressure, thereby increasing the outer diameter of the entire hydraulic shock absorber. This allows you to easily select the desired initial load for the suspension spring.

[Brief explanation of the drawing]

】・Figure 1 is a vertical sectional front view showing the main parts of the initial setting load adjustment device of the present invention, ・Figure 2 is a vertical sectional side view of the same, and Figures 4 and 3 are vertical sectional front views showing the main parts of other embodiments. be. (1)...Hydraulic shock absorber-(2)...Cylinder, (5
)... Housing, (6)... Fluid chamber - (8)...
・, Drive part removal, (10)...Spring seat, 01
)...Suspension spring, (12)・ψ・stopper. Representative patent attorney Izumi Amano aIjP1 emblem 2

Claims (4)

[Claims] (1) A spring seat that locks one end of the suspended splinter and a housing sink that accommodates a driving member that supports this spring seat are installed on the outer circumference of the cylinder. In the hydraulic shock absorber, a stopper is provided in the housing sink and can be moved so as to come into contact with the outer periphery of the drive member, and this stopper and the contact portion of the drive member are provided in the housing sink. A suspension splitter in a hydraulic shock absorber is provided with step-like cams that selectively engage with each other to restrict the displacement of the drive and auxiliary parts.
Setting load adjustment device. (2) An initial setting load adjusting device for a suspension splitter in a hydraulic shock absorber according to claim 1, wherein a ram is used as the driving member. (3) Initial setting load of the suspension splitter in the hydraulic slackener according to claim 2, wherein the ram is provided with 4M cams, and the end of the stopper is selectively engaged with one of the cams. Adjustment device. (4) Adjusting the initial setting load of a suspension spring for a hydraulic shock absorber according to claim 2, in which a stopper is provided with a plurality of cams, and one of the cams engages the end of the ram. Device.