JPH0318756Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a hydraulic shock absorber equipped with an adjustment mechanism for adjusting damping force.

[Problem to be solved by the invention] When adjusting the damping force of a hydraulic shock absorber provided corresponding to each wheel of a vehicle according to driving conditions and road conditions, a damping force adjustment mechanism is provided to each hydraulic shock absorber. It will be done. This damping force adjustment mechanism includes an adjustment member that adjusts the opening degree of the oil passage, a drive device that performs adjustment operation on this adjustment member, and a power supply circuit that supplies driving power to this drive device. However, in this case, it is preferable to allow the operator to check the adjustment state so as not to cause anxiety to the operator and to discover malfunctions.

This invention was made in view of the above points,
The object thereof is to provide a hydraulic shock absorber equipped with a damping force adjustment mechanism that can simultaneously adjust the damping force for each of a plurality of wheels and also allow the adjustment state to be confirmed.

[Means for Solving the Problems] According to the present invention, the object is to adjust the damping force of the first hydraulic shock absorber body and the damping force generation mechanism of the first hydraulic shock absorber body. a first damping force adjusting member rotatably provided within a first hydraulic shock absorber body; and a first damping force adjusting member connected to the first damping force adjusting member to rotate the first damping force adjusting member. a motor, a power source whose one end is electrically connected to one terminal of the first motor, and a power source that is mounted to rotate in accordance with the rotation of the first damping force adjustment member, and a peripheral portion of the motor. A conductive first disc having a first notch is electrically connected to the other terminal of the first motor, and the first disc is electrically connected to the other terminal of the first motor, and the first a first brush that is always in electrical contact with the disc; and a first brush that faces the first notch or is in electrical contact with the first disc, depending on the rotation angle of the first disc; at least two arranged at different angular positions so as to be in contact with the
a second hydraulic shock absorber body;
a second damping force adjustment member rotatably provided within the second hydraulic shock absorber body in order to adjust the damping force of the damping force generation mechanism of the second hydraulic shock absorber body; The damping force adjusting member is connected to the second damping force adjusting member to rotate the damping force adjusting member, one terminal is electrically connected to one end of the power source, and the other terminal is connected to the other end of the first motor. a second motor connected to the terminal of the second damping force adjusting member, and a second electrically conductive motor that is attached to rotate in accordance with the rotation of the second damping force adjustment member and has a second notch in the peripheral edge thereof. The disk is electrically connected to the other terminal of the second motor, and is always in electrical contact with the second disk regardless of the rotation angle of the second disk. A third brush connected to the first brush faces the second notch or electrically contacts the second disc, depending on the rotation angle of the second disc. at least two fourth brushes arranged at different angular positions and connected to the second brush, respectively; one of the second brushes, one of the fourth brushes, and the third brush; at least two contacts connected to the other of the second brush and the other of the fourth brush, respectively, one end is connected to the other end of the power supply, and the other end is selectively connected to one of the contacts. A switch to be connected is connected to one end of the power source and each of the contacts via one electrical connection line,
a display device that displays the setting state of the damping force selected by the switch; another electrical connection line that connects one end of the power source to the first brush and the third brush; current display means provided on the connection line; first reverse current prohibition means provided on the other connection line for prohibiting the flow of current from the power supply to the motor; and each of the contacts and the Achieved by a hydraulic shock absorber including a second reverse current inhibiting means that electrically connects the second brush and the fourth brush and inhibits the flow of current from the power source to the motor. be done.

[Specific Example] Next, the present invention will be explained in more detail based on a preferred specific example shown in the drawings.

In FIGS. 1 to 3, an inner tube 1 as a cylinder is installed in an outer tube 2, and a cap 3 is fixed to one end of the inner tube 1 and the outer tube 2.
An attachment ring 4 for attaching the hydraulic shock absorber body 78a to an axle or the like is integrally connected to the cap 3. A rod guide 5 and a cap 6 are fitted into the other ends of the inner cylinder 1 and the outer cylinder 2, respectively, and a piston rod 7 passes through the guide 5 and the cap 6 and extends upward. A packing 8 is provided in the cap 6 so as to contact the periphery of the rod 7 in a sealing manner, and the packing 8 is pressed against the inner surface of the cap 6 and the outer peripheral surface of the rod 7 by a spring 10 via a retainer 9. ing.

A piston 11 fitted into the inner cylinder 1 is connected to one end of the rod 7 so as to define the chamber 12 of the inner cylinder 1 into two oil chambers 13 and 14. piston 1
1 includes one-way valves 15 and 16 made of disk valves.
Passages 17 and 18 are provided which are opened and closed, respectively. Furthermore, the piston 11 has a chamber 13,
A passage branching off from the passage 17, that is, a fixed orifice, is provided to keep the passage 14 in constant communication. 19 is a washer, and 20 is a piston ring. The valve 15 opens when the hydraulic pressure in the chamber 14 becomes larger than a certain value with respect to the hydraulic pressure in the chamber 13, and allows the oil to flow from the chamber 14 to the chamber 13 through the passage 17. However, when the value becomes smaller than a certain value, the valve closes and prevents the oil from flowing from the chamber 14 to the chamber 13 via the passage 17. The valve 16 opens when the hydraulic pressure in the chamber 13 is higher than a certain value with respect to the hydraulic pressure in the chamber 14, and closes when it is lower than the hydraulic pressure in the chamber 14.
It performs the opposite action to valve 15.

An annular chamber 2 defined by an inner cylinder 1 and an outer cylinder 2
1 communicates with a chamber 14 through a through hole 22 bored at one end of the inner cylinder 1, and chambers 21, 13, and 14 contain oil, and an inert gas is placed above the chamber 21. Pressurized gas is enclosed.

The rod 7 is provided with a through hole 23 extending in the longitudinal direction from the upper end to the lower end of the rod 7.
A connecting rod 24 extends rotatably within the through hole 23 . The rod 7 also has a through hole 23 and a chamber 13.
A radial through hole 25 is provided to connect the two. Furthermore, a cylindrical body 26 is screwed onto the lower end of the rod 7, and a lid 27 is screwed onto the lower end of the cylindrical body 26.

A shutter 29 serving as a damping force adjusting member is attached to one end of the connecting rod 24 and is rotatably held within the cylinder body 26 . Holes 30, 31, and 32 of different diameters are bored in the side wall of the cylinder 26, and when the shutter 29 is rotated within the cylinder 26 through the connecting rod 24, the holes 34 of the shutter 29
holes 30, 31 and 3 as orifices through
2 are selectively opened and closed. Holes 30, 31 and 32
are provided on the side wall of the cylinder 26 at angular intervals of approximately 120 degrees. The diameter of holes 30, 31 and 32 is 3
The numbers increase in the order of 0, 31, and 32. The hole 34 of the shutter 29 extends from the side wall of the shutter 29 by a predetermined width, and this width is the same as that of the holes 30, 31 and 32.
The diameter of the hole 32 is set to be smaller than the respective intervals between the two holes and larger than the diameter of the hole 32. A spring 35 is disposed between the shutter 29 and the lid 27, and the spring 35 urges the shutter 29 upward. In addition to the hole 34, the shutter 29 has a hole 36 formed with a sufficiently larger passage cross-sectional area than the hole 32, and the hole 23 and the hole 30, 31, or 32 communicate with each other through the holes 34, 36. be done.
The holes 23, 25, 34 and 36 are the hydraulic shock absorber main body 7.
It constitutes the liquid passage of the damping force generating mechanism 8a.
One end of the rod 7 located outside the inner cylinder 1 is attached to the vehicle body via an attachment mechanism 37. Hole 2
An O-ring 38 is arranged at the upper end of the hole 23 to prevent leakage of oil from the hole 23. A case 40 of a drive device 39 for rotating the connecting rod 24 and thus the shutter 29 is attached to the upper end of the rod 7, and a DC motor 51 is attached to the case 40. A gear 52 is attached to the output shaft of the motor 51.
is fixed to the shaft 53, and the gear 52 meshes with the gear 54 fixed to the shaft 53.
With this combination, the rotation of the output shaft of the motor 51 is transmitted to the shaft 53 at a reduced speed. A shaft 53 is rotatably held by a substrate 55 supported by the case 40 via a bearing 56, and the shaft 53 and the connecting rod 24 are connected so that the rotation of the shaft 53 is transmitted to the connecting rod 24. ing. A conductive disc 58 having a notch 57 is fixed to the shaft 53, and a brush mounting plate 59 is provided facing the disc 58 and supported by the case 40. The brushes 60, 61 have an angular spacing of about 120° with respect to the direction.
and 62 are provided, and the brushes 60, 61, and 62 are in electrical contact with the disc 58 unless they face the notch 57. Further, a brush 63 is provided on the mounting plate 59 so as to always be in electrical contact with the disc 58 regardless of the position of the notch 57. The brush 63 is the motor 51
The brush 60 is connected to one end of the diode 65, and the brush 60 is connected to one end of the diode 65.
The brush 62 is connected to one end of the diode 66.
1 are electrically connected to one end of the diode 67, respectively. The motor 51, disc 58, etc. arranged in the case 40 in this way and the hydraulic shock absorber body 78a
is provided for one wheel of a vehicle,
Similar motors, discs, and hydraulic shock absorber bodies are provided for the other three wheels, and these are shown in FIG. 3 with corresponding symbols a, b, and c. Note that the remaining three hydraulic shock absorber bodies themselves are not shown. One end of the DC power supply 68 is a fuse 69,
Motors 51, 51a, 51 via switch 70
b and one end of 51c and diodes 74, 75,
The diode 76 is connected to one end of each diode 76.
The other ends of 4, 75 and 76 are resistors 71, 72, 7
The other ends of resistors 71, 72 and 73 are connected to fixed contacts 84, 85 and 86 of damping force selection switch 83, respectively, and diode 6.
5, 65a, 65b, 65c, 66, 66a, 6
6b, 66c and 67, 67a, 67b, 67c
is connected to one end of the One end of the operation monitor lamp 80 as a current display means is connected to the fuse 6.
9, to the DC power supply 68 via the switch 70, the other end is connected to the diodes 64, 64a, 64b, 64
Motors 51, 51a, 51b, 51 via c
connected to one end of c. A movable contact 87 of the switch 83 is connected to the other end of the power source 68. In this way, in the power supply circuit 88 shown in FIG.
a, 66b, 66c, 67, 67a, 67b, 6
7c constitutes a second reverse current inhibiting means. Switches 70, 83 and diodes 74, 75, 7
6 are each mounted operably and visually on the operation panel of the driver's seat of the vehicle.

In the hydraulic shock absorber equipped with the damping force adjustment mechanism configured in this manner, the switch 70 is turned on, the movable contact 87 of the switch 83 is connected to the contact 84, and the notch 57 is set at the position shown in the figure. When the brush 60 and the disc 58 are out of contact,
No current from the power supply 68 flows through the motor 51, the gears 52, 54, the shaft 53, the connecting rod 24 and the shutter 29 remain stopped, the hole 34 coincides with the hole 30, and the chambers 13 and 14 are connected to each other. 25, 23, 36,
34 and 30, and the hydraulic shock absorber main body 78a is defined by the fixed orifice formed in the piston 11, the valve 16, and the hole 30 on the extension side, that is, when the piston 11 moves in the F direction. Produces a damping force. The diameter of hole 30 is the same as that of holes 31 and 32.
In this case, the hardest damping force is obtained in the hydraulic shock absorber main body 78a. Also on the contraction side, that is, the piston 11
A similar first hardest damping force is obtained when moving in the G direction. The same applies to the hydraulic shock absorber bodies provided for other wheels. Furthermore, in this state, since the brushes 60 and 63 are not electrically connected, the operation monitor lamp 80 does not light up, and as a result, the current regulated by the resistor 71 flows only through the diode 74, so that only the diode 74 emits light, and the operation monitor lamp 80 does not light up. By turning on the diode 74, it can be confirmed that all the hydraulic shock absorber bodies including the body 78a are set to produce the hardest damping force.
Next, when the switch 83 is operated so that the movable contact 87 comes into contact with the contact 85, the current from the power source 68 flows through the motor 51, the brush 63, the disc 58, the brush 62, and the diode 66.
1 is actuated to rotate gears 52 and 54;
The rotation of the gear 54 rotates the disc 58 in the direction A, and when this rotation sets the notch 57 to a position facing the brush 62, the disc 58 and the brush 62 are out of contact, and the power from the power source 68 is removed. The supply of current to the motor 51 is interrupted and the motor 51 is deactivated. When the gear 54 rotates in the A direction, the shutter 2
9 is also rotated in the A direction, and the brush 62 of the notch 57
In this arrangement, the hole 34 is set to face the hole 31, and the chambers 13 and 14 are connected to the holes 25, 23, 36,
34 and 31, and the hydraulic shock absorber body 78a produces an intermediate damping force when the piston 11 moves in the F direction and the G direction, since the hole 31 has a larger diameter than the hole 30. The same applies to the hydraulic shock absorber bodies provided for other wheels. Further, from the time when the contact 87 comes into contact with the contact 85 until the time when the notch 57 reaches the position of the brush 62 and the brush 62 and the disc 58 are out of contact, the operation monitor lamp 80 is connected to the diode 64 and the brush 63. ,
Brush 62, diode 66, selector switch 85
The notch 57 of the encoder plate of all systems is
The light will continue to light up until there is no contact with the light, and then it will turn off. When the operation monitor lamp is lit, it can be confirmed that the adjustment operation is in progress, and when the operation monitor lamp is turned off, it can be confirmed that the adjustment operation is completed. In addition, the operation monitor lamp 80
The brushes 63a, 63b, 63c and the brush 62
As long as at least one of a, 62b, and 62c is electrically connected, the lighting continues, so if this state continues for a long time, it can be confirmed that there is an abnormality. In this case, the diode 75 is lit from the time of switching. That is, the operation display device is configured to be operated in two states so that it is possible to distinguish between during the adjustment operation and after the adjustment operation is completed. The same applies when the switch 67 is operated so that the contact 87 is connected to the contact 86.

By the way, in the above, the discs 58, 58a, 58b and 58c all rotate synchronously, and the notches 57, 5
We have explained the operation when the contact and non-contact of the brushes 7a, 57b and 57c are performed synchronously for all wheels. , even if the notches 57, 57b and 57c of the discs 58, 58b and 58c are arranged on the brushes 62, 62b and 62c, the notches 57 of the disc 58a
a is not yet placed on the brush 62a and the diode 65a is not provided, the current from the power source 68 will flow through the motor 51, the brush 63,
Since the flow passes through the disc 58, brush 60, diode 65, brush 60a, brush 62a, diode 66a, and switch 83, the motor 51 is further driven, and the disc 58 is rotated further even though the adjustment has been completed. be done. That is, the diode 65a acts to inhibit the current from flowing, and the same applies to the diodes 66a and 67a. In addition, in the above-mentioned state, if the diode 64 is not provided, the current from the power source 68 will flow through the motor 51, the diode 64a, and the brush 6.
3a, disk 58a, brush 60a, diode 6
5a and the switch 83, the motor 51 is further driven and the disc 58 is further rotated even though the adjustment has been completed. That is, diodes 64, 64a, 64b
and 64c inhibit such current flow. Diode 65, 66, 67, 65b, 66
The same applies to b, 67b, 65c, 66c, and 67c.

In the above specific example, the switch 83 is connected to the power source 68.
However, the present invention is not limited to this, and the switch 83 is connected to the power supply 68 as shown in FIG.
A power supply circuit 90 similar to the power supply circuit 88 may be configured by providing the power supply circuit 90 on the positive terminal side of the power supply circuit 88 . Further, in the specific example described above, a light emitting diode was used as the display element of the display circuit, but the present invention is not limited to this, and a general incandescent lamp may be used.

[Effect of the invention] As described above, according to the invention, by selectively connecting the other end of the switch to one of the contacts, the notch of each disc can be connected to the second contact connected to the selected contact. Each damping force adjusting member can be rotated until it comes to face each of the first brush and the fourth brush, and the damping force of the damping force generating mechanism of the hydraulic shock absorber body is adjusted to a predetermined value, and each damping force adjustment member is The setting state of the member can be constantly displayed by the display device, and the same effect can be achieved by selectively connecting the other end of the switch to the other contact point. In addition, according to the present invention, during the rotational movement of the damping force adjustment member,
The current display means can be actuated to facilitate identification after the adjustment operation has been completed, and when the notch in the first disc faces one of the second brushes, the Even if the notch does not face one of the fourth brushes, the first motor can be reliably stopped, and vice versa, the second motor can be reliably stopped.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view of a preferred embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1,
Figure 3 is an electrical circuit diagram of the specific example shown in Figure 1;
The figure is an explanatory diagram of another specific example of the electric circuit. 29... Damping force adjustment member, 39... Drive device,
74, 75, 76... Light emitting diode, 64, 6
5, 66, 67...Diode, 80...Operation monitor lamp.

Claims (1)

[Claims for Utility Model Registration] (1) In order to adjust the damping force of a first hydraulic shock absorber body and a damping force generation mechanism of the first hydraulic shock absorber body, a first damping force adjusting member rotatably provided in the first damping force adjusting member;
a first motor connected to the first damping force adjusting member to rotate the damping force adjusting member;
One end is attached to a power source electrically connected to one terminal of the first motor, and the first damping force adjusting member is attached to rotate in accordance with the rotation of the first damping force adjusting member. A conductive first disc having a notch is electrically connected to the other terminal of the first motor, and the first disc is electrically connected to the first disc regardless of the rotation angle of the first disc. A first brush that is always in electrical contact, and a brush that faces the first notch or is in electrical contact with the first disc depending on the rotation angle of the first disc. in order to adjust the damping force of at least two second brushes disposed at different angular positions, a second hydraulic shock absorber body, and a damping force generating mechanism of the second hydraulic shock absorber body; a second damping force adjusting member rotatably provided within a second hydraulic shock absorber main body; and connected to the second damping force adjusting member to rotate the second damping force adjusting member; a second motor having one terminal electrically connected to one end of the power source and the other terminal connected to the other terminal of the first motor; and rotation of the second damping force adjusting member. It is mounted so that it rotates according to the
A second electrically conductive disc having a second notch on its periphery is electrically connected to the other terminal of the second motor, regardless of the rotation angle of the second disc. a third brush always in electrical contact with the second disk and connected to the first brush;
and the brushes are arranged at different angular positions so as to face the second notch or to be in electrical contact with the second disc, depending on the rotation angle of the second disc. at least two fourth brushes connected to the second brush, one of the second brushes, one of the fourth brushes, the other of the second brushes, and the fourth brush. a switch having one end connected to the other end of the power source and the other end selectively connected to one of the contacts; a display device that connects one end of the power source and each of the contacts via a physical connection line and displays a setting state of the damping force selected by the switch; and one end of the power source and the first brush. and the third brush, a current display means provided on the other connection line, and a current display means provided on the other connection line, and a current display means provided on the other connection line, A first reverse current inhibiting means for inhibiting the flow of current is electrically connected to each of the contacts and the second brush and the fourth brush, and the current is inhibited from flowing from the power source to the motor. a second reverse current inhibiting means for inhibiting flow. (2) The hydraulic system according to claim 1, wherein three second brushes are provided, three contacts are provided, and the current display device includes three light emitting diodes. buffer.