JPH047387Y2 - - 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.

[Problems to be Solved by the Invention] When adjusting the damping force of a hydraulic shock absorber installed in a vehicle according to driving conditions and road conditions, a damping force adjustment mechanism is provided in the hydraulic shock absorber.

This damping force adjustment mechanism includes an adjustment member that adjusts the opening degree of the oil passage, a drive device that performs an adjustment operation on the adjustment member, and a power supply circuit that supplies driving power to the drive device. Although it is composed of
In this case, it is preferable to allow the operator to confirm 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 whose adjustment state can be checked.

[Means for Solving the Problems] According to the present invention, the object is to provide a damping device rotatably provided in the hydraulic shock absorber body in order to adjust the damping force of the damping force generation mechanism of the hydraulic shock absorber body. a force adjusting member; a motor connected to the damping force adjusting member to rotate the damping force adjusting member; a power supply having one end electrically connected to one terminal of the motor; It is mounted to rotate and is electrically connected to a conductive disc with a non-conductive part in a part and the other terminal of the motor, so that it is always connected to the disc regardless of the rotation angle of the disc. A first brush that is in electrical contact and is arranged at different angular positions so as to face the non-conductive part alone or to be in electrical contact with the disc, depending on the rotation angle of the disc. at least three second brushes;
a switch having one end connected to the other end of the power supply and the other end selectively connected to one of the contacts, each of the contacts and one end of the power supply; This is accomplished by a hydraulic shock absorber having at least three display devices connected to each other and displaying the damping force setting selected by the switch.

[Function] When the hydraulic shock absorber of the present invention switches the other end of the switch from one of the contacts to the other, immediately after switching, firstly, the other end of the switch is connected to the switched and disconnected contact. Since one of the second brushes is facing the non-conductive part alone, the display device connected to the contact is in the non-display state, and the second brush is switched and the other end of the switch is contacted by the other end. The display device connected to the contact enters the display state, and thirdly, the display device connected to the other contact, which is not yet contacted even after switching, is in a state of conduction with each other via the disk. A closed circuit is formed by at least two other of the brushes No. 2 and the other contact points that have been switched and contacted, resulting in a display state, and based on the display state of these series of display devices, the operator can It can be identified that the setting state of the damping force of the device is the switching start state.

In addition, during the switching operation that has progressed further from the above-mentioned switching start state, all of the second brushes are in a state of conduction with each other via the disk, so that the second brushes are not connected to each other via the other switched and contacted contacts. As described above, a closed circuit is formed and all the display devices are in the display state, so the display state of these series of display devices allows the operator to know whether the setting state of the damping force of the hydraulic shock absorber is in the middle of switching operation. It can be identified that

Furthermore, when one of the second brushes connected to the other switched and contacted contacts comes to face the non-conductive part alone and the switching operation is completed, it is the switched brush that is connected to the power source. This display state allows the operator to check the current setting of the damping force of the hydraulic shock absorber because only the other contacts that have been touched will be in the display state. The condition can be identified.

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

In the figure, the inner tube 1 as a cylinder is the outer tube 2.
A cap 3 is fixed to one end of the inner cylinder 1 and outer cylinder 2, and a mounting ring 4 for attaching the hydraulic shock absorber body 78 to an axle or the like is integrally connected to the cap 3. has been done.

A rod guide 5 is provided at the other end of the inner cylinder 1 and the outer cylinder 2.
and a cap 6 are fitted respectively, and the guide 5
A piston rod 7 passes through 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.

The piston 11 has a passage 1 that is opened and closed by one-way valves 15 and 16, each of which is a disk valve.
7 and 18 are provided.

Furthermore, the piston 11 has a passage branched from the passage 17 in order to keep the chambers 13 and 14 in communication with each other at all times.
That is, a fixed orifice is provided.

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. When the value becomes smaller than a certain value, the valve closes.
Oil fluid is prevented from flowing from chamber 14 to chamber 13 via passage 17.

The valve 16 opens when the hydraulic pressure in the chamber 13 is higher than a certain value compared to the hydraulic pressure in the chamber 14, and closes when the hydraulic pressure is lower than the hydraulic pressure in the chamber 14, and performs the opposite action to the 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 .

Further, the rod 7 is provided with a radial through hole 25 that connects the through hole 23 and the chamber 13.

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, 3 of different diameters are provided in the side wall of the cylinder 26.
1 and 32 are bored, and when the shutter 29 is rotated within the cylinder body 26 through the connecting rod 24, the holes 30, 31, and 32 as orifices are selectively opened and closed through the hole 34 of the shutter 29. Ru.

Holes 30, 31, and 32 are each provided in the side wall of barrel 26 at angular intervals of about 120 degrees.

The diameters of holes 30, 31 and 32 are 30, 31, 3
They are increasing in the order of 2.

The hole 34 of the shutter 29 extends the side wall of the shutter 29 by a predetermined width, and this width is the same as that of the holes 30 and 31.
and 32, and larger than the diameter of the hole 32.

A spring 3 is installed between the shutter 29 and the lid 27.
5 is disposed, and the shutter 29 is urged upward by a spring 35.

The shutter 29 has a hole 36 in addition to the hole 34.
2, and the hole 23 and the hole 3 are formed to have a sufficiently larger passage cross-sectional area than the hole 23 and the hole 3
0, 31 or 32 are communicated.

The holes 23, 25, 34 and 36 constitute a liquid passage of the damping force generating mechanism of the hydraulic shock absorber main body.

One end of the rod 7 located outside the inner cylinder 1 is attached to the vehicle body via an attachment mechanism 37.

An O-ring 38 is arranged at the upper end of the hole 23 to prevent leakage of oil from the hole 23.

At the upper end of the rod 7 there is a connecting rod 24 and a case 40 of a drive device 39 for rotating the shutter 29.
is attached to the case 40, and a DC motor 51 is attached to the case 40.

A gear 52 is fixed to the output shaft of the motor 51, and the gear 52 meshes with a gear 54 fixed to a shaft 53. The combination of the gear 52 and the gear 54 causes the rotation of the output shaft of the motor 51. is transmitted to the shaft 53 at a reduced speed.

A bearing 56 is attached to a substrate 55 supported by the case 40.
The shaft 53 is rotatably held through the shaft 53 so that the rotation of the shaft 53 is transmitted to the connecting rod 24.
3 and the connecting rod 24 are connected.

A part of the shaft 53 has a notch 57 as a non-conductive part.
A conductive disc 58 is fixed to the case 40.
The brushes 6 are mounted on the mounting plate 59 at angular intervals of approximately 120° in the circumferential direction.
0, 61 and 62 are provided, and the brush 6
0, 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.

Note that the brush 63 serves as a first brush, the brushes 60, 61, and 62 serve as a second brush, and the disc 58 having a notch 57 serves as a conductive circle having a non-conductive portion. They each make up a board.

The brush 63 is electrically connected to one end of the motor 51, and the other end of the motor 51 is connected to a fuse 64,
It is electrically connected to one end of a DC power source 66 via a switch 65.

The other end of the power supply 66 is a movable contact 68 of a switch 67.
The three contacts 69, 70 and 71 of the switch 67 are electrically connected to the brushes 60, 6, respectively.
1 and 62 electrically.

A display circuit consisting of resistors 72, 73, 74 and light emitting diodes 75, 76, 77 is inserted between the contacts 69, 70 and 71 and one end of the power supply 66, respectively.

The switches 65, 67 and the diodes 75, 76, 77 as display devices are connected to the hydraulic shock absorber main body 78.
It is attached to the operation panel of the driver's seat of the vehicle in which the

In the hydraulic shock absorber equipped with the damping force adjustment mechanism configured in this manner, the switch 65 is turned on, the movable contact 68 of the switch 67 is connected to the contact 69, 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, the current from the power source 66 does not flow to the motor 51, and the gears 52, 54, shaft 53, connecting rod 24, and shutter 29 remain stopped. , hole 34 coincides with hole 30, chambers 13 and 14 correspond to holes 25, 23,
36, 34, and 30, and the hydraulic shock absorber main body 78 is defined by the fixed orifice formed in the piston 11, the valve 16, and the hole 30 when the piston 11 moves in the extension side, that is, in the F direction. This produces a damping force.

Since the diameter of the hole 30 is smaller than that of the holes 31 and 32, the hardest damping force is obtained in the hydraulic shock absorber body 78 in this case.

The same first-hardest damping force is obtained also on the contraction side, that is, when the piston 11 moves in the G direction.

Also, in this state, as a result of current flowing only through the diode 75, only the diode 75 emits light.
Therefore, by lighting the diode 75, it can be confirmed that the main body 78 is set to produce the hardest damping force.

Next, when the switch 67 is operated so that the movable contact 68 comes into contact with the contact 70, the current of the power source 66 is transferred to the motor 51, the brush 63, the disc 58, and the brush 61.
, the motor 51 is actuated to
The gears 52 and 54 are rotated, and the rotation of the gear 54 rotates the disc 58 in the direction A. When this rotation sets the notch 57 to a position facing the brush 61, the disc 58 and the brush 61 are brought together. There is no contact, the supply of current from the power source 66 to the motor 51 is interrupted, and the motor 51 is rendered inactive.

The shutter 29 is simultaneously rotated by the rotation of the gear 54 in the A direction.
is also rotated in the A direction, and the notch 57 is placed on the brush 61, so that the hole 34 is set to face the hole 31, and the chambers 13 and 14 are connected to the holes 25, 23, 36, 3.
4 and 31, and the hydraulic shock absorber main body 7
8, since the hole 31 has a larger diameter than the hole 30, movement of the piston 11 in the F direction and the G direction produces an intermediate damping force.

Further, at the time when the contact 68 is brought into contact with the contact 70, the diode 75 stops emitting light, current is passed through the diodes 76 and 77, these diodes 76 and 77 emit light, and then the notch 57
passes the position of the brush 60 and contact between the brush 60 and the disk 58 occurs, the diodes 75 and 76
and 77, and finally the notch 5
7 is set at the position of the brush 61, only the diode 76 emits light, which confirms that it is set to produce an intermediate damping force.

The same applies when the switch 67 is operated so that the contact 68 is connected to the contact 71.

In the above specific example, a light emitting diode was used as the display device of the display circuit, but the present invention is not limited to this, a general incandescent lamp may be used, and the display is not limited to one that displays by turning on and off. For example, it may be possible to select a dial board and display characters.

Further, as shown in FIG. 4, a switch 67, resistors 72, 73, 74 and light emitting diodes 75, 7
A series circuit with 6 and 77 may be arranged.

Furthermore, the hydraulic shock absorber of the present invention may be applied to each axle of a vehicle.

[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 non-conductive portion of the disk can be connected to the selected contact. The damping force adjusting member can be rotated until it comes to face one of the two brushes, and the damping force adjusting member of the hydraulic shock absorber body can be adjusted to a predetermined value.

In addition, according to the present invention, when the other end of the switch is switched from one of the contacts to the other, at least two display devices are in the display state immediately after switching, and further progressing from this switching start state is possible. During the switching operation, all the display devices are in the display state, and when the switching operation is completed, only the one display device corresponding to the completed switching position is in the display state, so the operator must:
Just by looking at the display status of these display devices, you can tell whether the setting status of the damping force of the hydraulic shock absorber is in the switching start state, or is in the process of switching, or what setting the damping force is currently in. The condition can be easily identified.

[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;
This figure is another electric circuit diagram that can be applied to the specific example shown in FIG. 1 in place of the electric circuit shown in FIG. 3. 29... Damping force adjustment member, 39... Drive device,
51... Motor, 57... Notch (non-conductive part),
60, 61, 62...brush (second brush),
63... Brush (first brush), 66... Power supply,
67...Switch, 69,70,71...Contact,
75, 76, 77... Light emitting diode (display device).

Claims (1)

[Claims for Utility Model Registration] (1) A damping force adjustment rotatably provided on the hydraulic shock absorber body in order to adjust the damping force of the hydraulic shock absorber body and the damping force generation mechanism of the hydraulic shock absorber body. a motor connected to the damping force adjusting member to rotate the damping force adjusting member, a power source having one end electrically connected to one terminal of the motor, and a motor connected to the damping force adjusting member to rotate the damping force adjusting member; and is electrically connected to a conductive disk having a non-conductive portion in a part thereof and the other terminal of the motor, regardless of the rotation angle of the disk. a first brush that is always in electrical contact with the disc; and a first brush that faces the non-conductive part alone or with each other so as to be in electrical contact with the disc, depending on the rotation angle of the disc; at least three second brushes arranged at different angular positions; at least three contacts respectively connected to the second brushes; one end connected to the other end of the power source; A switch selectively connected to one of the contacts, and at least three display devices connected to each of the contacts and one end of the power source and displaying the setting state of the damping force selected by the switch. Hydraulic buffer. (2) The hydraulic shock absorber according to claim 1, wherein the display device is a light emitting diode.