JP4768167B2 - Body posture adjustment device for motorcycles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle body posture adjusting device for a two-wheeled vehicle that automatically adjusts the posture of a vehicle body that changes due to two passengers, cargo loading, traveling on a slope, and the like to an appropriate posture.
[0002]
[Prior art]
Unlike a four-wheeled vehicle, a two-wheeled vehicle is a vehicle that is very useful for traveling and parking on narrow roads and parking lots because it has a short wheelbase and a small vehicle width.
[0003]
However, while it can be used easily, the weight ratio of passengers and cargo to the weight of the vehicle body is much higher than that of a four-wheeled vehicle, and therefore the inclination of the vehicle body tends to increase when two passengers or cargo is loaded.
[0004]
[Problems to be solved by the invention]
However, when the inclination of the vehicle body increases as described above due to such two passengers, cargo loading, or movement of the sprung center of gravity while traveling on a slope, the vehicle body posture becomes unbalanced and the vehicle travels. There was a problem that stability and riding comfort were deteriorated, and that a long time driving caused significant fatigue.
[0005]
Furthermore, the vehicle body posture during traveling may be further deteriorated due to the pitching movement of the vehicle body that occurs during deceleration associated with the brake operation or acceleration associated with the accelerator operation. .
[0006]
In addition, some small-to-medium-sized two-wheeled vehicles that have little space for installation and do not like the increase in weight and cost can be adjusted only by manual operation. There is nothing that can be done.
[0007]
On the other hand, there is a special large vehicle equipped with a hydraulic power source, state sensing device, actuator and controller so that the vehicle body posture can be adjusted, but there is enough space in the vehicle body to mount these. In addition, there is a problem in that it is necessary and the cost and weight increase, and it is practically impossible to develop into small to medium-sized vehicles.
[0008]
The present invention solves the above-mentioned problems, and can be deployed in small to medium-sized vehicles with a simple and low-cost configuration, and the vehicle body is suitable regardless of changes in the number of passengers and cargo loading capacity. It is an object of the present invention to provide a vehicle body posture adjusting device for a two-wheeled vehicle that can secure a posture and can always obtain good running stability and riding comfort.
[0009]
[Means for Solving the Problems]
  In order to achieve the above object, a vehicle body posture adjusting apparatus for a two-wheeled vehicle according to the first aspect of the present invention is provided on the damper side with a suspension comprising a damper and a suspension spring provided between the vehicle body and the axle. And a hydraulic jack carrying one end of the suspension spring and a free piston that divides the cylinder into a first oil chamber and a second oil chamber.Hydraulic pumpA spring provided in the second oil chamber for biasing the free piston toward the first oil chamber, an oil passage connecting the second oil chamber and the oil chamber of the hydraulic jack, The first oil chamber is provided in the cylinder so as to be slidable in the axial direction, and partitions the first oil chamber between the cylinder and the free piston.Hydraulic pumpAnd a driving means having an output shaft screwed to a rod integral with the piston, and a controller detects a pressure of the first oil chamber and the second oil chamber. The vehicle height is calculated based on the outputs of the sensor and the second pressure sensor, and the drive amount of the drive means is controlled so that the vehicle height is set to a preset appropriate vehicle height.
[0010]
  As a result, the vehicle height state is accompanied by a change in the oil chamber pressure of the hydraulic jack.Hydraulic pumpThe pressure changes in the first oil chamber and the second oil chamber are detected by each one pressure sensor, and the calculated values of the outputs of these pressure sensors, for example, the detected pressure difference of each pressure sensor becomes the set value. As by drive meansHydraulic pumpThus, hydraulic supply / discharge control is performed between the second oil chamber and the oil chamber of the hydraulic jack, and the vehicle height can be adjusted to a set level.
[0011]
  According to a second aspect of the present invention, there is provided a vehicle body posture adjusting device for a two-wheeled vehicle, comprising: a suspension comprising a damper and a suspension spring provided between the vehicle body and an axle; and a suspension spring disposed on the damper side. A hydraulic jack, a metering cylinder partitioned into a first oil chamber and a second oil chamber by a free piston, and the second oil chamber. The free piston is disposed in the first oil chamber. A spring energizing in the direction, an oil passage connecting the second oil chamber and the oil chamber of the hydraulic jack, and a third oil chamber communicating with the first oil chamber in the cylinder. With a piston that can slide axiallyHydraulic pumpAnd a driving means having an output shaft screwed to a rod integral with the piston, and a controller for detecting a pressure of the first oil chamber and the second oil chamber, The vehicle height is calculated based on each output of the second pressure sensor, and the drive amount of the drive means is controlled so that the vehicle height is set to an appropriate vehicle height set in advance.
[0012]
  Thus, the vehicle height state is detected by each one pressure sensor as a pressure change in the first oil chamber and the second oil chamber of the hydraulic screw pump accompanying a change in the oil chamber pressure of the hydraulic jack, and these pressure sensors So that the calculated value of the output of, for example, the detected pressure difference of each pressure sensor becomes the set value by the driving means.Hydraulic pumpTo the first oil chamber in the metering cylinderHydraulic pumpThe hydraulic pressure in the third oil chamber can be supplied and discharged and adjusted to an appropriate vehicle height level as described above.
[0013]
According to a third aspect of the present invention, there is provided a vehicle body posture adjusting device for a two-wheeled vehicle, comprising: a suspension comprising a damper and a suspension spring provided between the vehicle body and an axle; and a suspension spring disposed on the damper side. A hydraulic jack, a metering cylinder partitioned into a first oil chamber and a second oil chamber by the free piston, and the second oil chamber. The free piston is provided in the first oil chamber. A spring energizing in the direction, an oil passage connecting the second oil chamber and the oil chamber of the hydraulic jack, a hydraulic pressure source connected to the first oil chamber via a hydraulic supply valve, An oil tank connected to the first oil chamber via a hydraulic discharge valve is provided, and a first pressure sensor and a second pressure sensor detect the pressures of the first oil chamber and the second oil chamber in the controller. Each of the pressure sensor Is computed the vehicle height based on the force, is obtained by the hydraulic pressure supply valve and hydraulic discharge valve so as to preset the proper vehicle height the 該車 high so as to open and close control.
[0014]
As a result, the hydraulic pressure supply / discharge control can be performed directly from the hydraulic pressure source to the first oil chamber of the metering cylinder, and the operation of the hydraulic jack can be controlled at high speed.
[0015]
    According to a fourth aspect of the present invention, there is provided a vehicle body posture adjusting apparatus for a two-wheeled vehicle, wherein the suspension is a front wheel side suspension and a rear wheel side suspension respectively provided at the front and rear of the vehicle body, and a hydraulic jack for each suspension is provided. Driven by each driving means under the control of the controllerHydraulic pumpAlternatively, the operation is controlled by a metering cylinder.
[0016]
As a result, the number of installed controllers can be reduced, and therefore the occupied space in the vehicle body can be minimized.
[0017]
  According to a fifth aspect of the present invention, there is provided a vehicle body posture adjusting device for a two-wheeled vehicle, comprising an inner tube that constitutes a suspension and is attached to one of the vehicle body side and the axle side, and is slidably provided in the inner tube. A pressing member supported via a suspension spring on the outer tube side attached to the other of the vehicle body side or the axle side, an oil chamber partitioned in the inner tube by the pressing member, and a first oil in the cylinder With a free piston that divides the chamber and the second oil chamberHydraulic pumpAnd an oil passage that is provided in the second oil chamber and connects the spring that biases the free piston toward the first oil chamber, and the second oil chamber and the oil chamber in the inner tube. And the axially slidable in the cylinder, and the first oil chamber is defined between the free piston and the first oil chamberHydraulic pumpA piston, an output shaft screwed into a rod integral with the piston, a first pressure sensor for detecting each pressure in the first oil chamber and the second oil chamber, and a second pressure sensor. Provided with a pressure sensor, the controller calculates the vehicle height based on the outputs of the first pressure sensor and the second pressure sensor, and drives the vehicle so as to set the vehicle height to a preset appropriate vehicle height. The drive amount of the means is controlled.
[0018]
Thus, the vehicle height can be adjusted using the vehicle height adjusting means incorporated in the inner tube of the suspension.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a block diagram conceptually showing a vehicle body posture adjusting device for a two-wheeled vehicle. In FIG. 1, A is a rear cushion unit. This is a wheel-side suspension, and has a damper 1 in which a piston rod 1b is provided in a cylinder 1a so as to be able to enter and exit.
[0020]
The damper 1 is provided in the piston rod 1b, in addition to the piston rod 1b movably inserted into the cylinder 1a via a piston, two oil chambers partitioned in the cylinder 1a by a piston (not shown). And a damping force generating mechanism for opening and closing the two oil chambers.
[0021]
The cylinder 1a has a bracket 2 integrally at its lower end, which is mounted on the axle side, and the piston rod 1b has a bracket 4 integrally at its upper end via a disc-shaped rod-side spring receiver 3. This is mounted on the vehicle body side.
[0022]
On the other hand, a cylindrical cylinder-side spring receiver 5 is attached to the outer periphery of the cylinder 1a so as to be slidable in the axial direction, and a bottomed cylindrical member 6 that opens upward is fixed to the outer periphery of the lower end of the cylinder 1a. .
[0023]
In the bottomed cylindrical member 6, the cylindrical portion 5 a of the cylinder side spring receiver 5 is fitted in and close to the cylinder side spring receiver 5, and oil is interposed between the cylinder side spring receiver 5 and the bottomed cylindrical member 6. A chamber 7 is formed.
[0024]
Here, the bottomed cylindrical member 6, the oil chamber 7 and the cylinder side spring receiver 5 constitute a hydraulic jack J.
[0025]
Further, a coil-like suspension spring 8 is interposed between the rod-side spring receiver 3 and the cylinder-side spring receiver 5, and this always urges the cylinder-side spring receiver 5 downward. That is, one end of the suspension spring 8 is carried by the cylinder side spring receiver 5.
[0026]
  9 isThis is a hydraulic pump (hereinafter referred to as a hydraulic screw pump or a screw pump), which is defined by a cylinder 10, a piston 11 and a free piston 12 slidably inserted into the cylinder 10, and the piston 11 and the free piston. A rod 17 formed of a first oil chamber 13 and a second oil chamber 14 and attached to the piston 11 is screwed into the output shaft 20 of the driving means D so as to be axially movable as will be described later. .
[0027]
The piston 11 and the free piston 12 are provided in the cylinder 10 so as to be slidable in the axial direction, and a spring 15 is provided in the second oil chamber 14 to constantly bias the free piston 12 toward the piston 11. .
[0028]
The second oil chamber 14 communicates with the oil chamber 7 of the hydraulic jack J through an oil passage (pipe) 16.
[0029]
One end of a rod 17 that goes in and out of the cylinder 10 is attached to the piston 11, and an output shaft 20 of a speed reducer 19 that interlocks with an electric motor 18 that can be driven forward and backward is screwed to the outer periphery of the rod 17. The electric motor 18 and the speed reducer 19 constitute a driving means D.
[0030]
  Furthermore, a first pressure sensor 21 that detects the pressure in the first oil chamber 13 and a second pressure sensor 22 that detects the pressure in the second oil chamber 14 are provided..
[0031]
The controller 23 receives the pressure signals Pa and Pb output from the first pressure sensor 21 and the second pressure sensor 22, and as a vehicle height state, for example, the current vehicle height difference from the appropriate vehicle height position. It functions to calculate the signal and drive the electric motor 18 for the number of revolutions or time corresponding to the appropriate vehicle height.
[0032]
Accordingly, the rod 17 screwed to the output shaft 20 of the speed reducer 19 moves in the axial direction, and the piston 11 moves the free piston 12 via the hydraulic oil in the oil chamber 13, so that the second oil The hydraulic oil in the chamber 14 is supplied to the oil chamber 7 of the hydraulic jack J, or the hydraulic pressure in the oil chamber 7 is released into the first oil chamber 14 so that the vehicle height is automatically adjusted to the appropriate vehicle height. Kept.
[0033]
That is, in the vehicle body posture adjusting device having such a configuration, the controller 23 changes the height of the rear wheel suspension A to the hydraulic pressure in the oil chamber 7 of the hydraulic jack J, that is, the hydraulic pressure that changes according to the hydraulic pressure. Each pressure (hydraulic pressure) in the first oil chamber 13 and the second oil chamber 14 of the screw pump 9 is monitored by a first pressure sensor 21 and a second pressure sensor 22.
[0034]
Based on the pressure data Pa, Pb from each of the monitored sensors 21, 22, the controller 23 calculates the current vehicle height, and sets the calculated vehicle height as a preset appropriate vehicle height. A control map prepared in advance in a memory or the like is used, and control currents such as normal rotation, reverse rotation, and stop corresponding to this data are supplied to the electric motor 18 in correspondence with the rotational speed or the driving time.
[0035]
On the other hand, the rotation of the electric motor 18 is transmitted to a rod 17 screwed to the output shaft of the speed reducer 19, and the rod 17 moves in the axial direction to move the piston 11 into the cylinder 10.
[0036]
The movement of the piston 11 changes the pressure in the first oil chamber 13, and the free piston 12 moves accordingly. As described above, the hydraulic oil in the second oil chamber 14 becomes the oil of the hydraulic jack J. The hydraulic oil in the oil chamber 7 of the jack J is supplied to the chamber 7 or discharged into the second oil chamber 14, and the height of the cylinder-side spring receiver 5 is adjusted.
[0037]
In accordance with this height adjustment, preload control of the suspension spring 8 is performed, and the vehicle height is automatically adjusted to the optimum vehicle height.
[0038]
That is, the pressure data Pb of the second oil chamber 14 indicates the equivalent pressure of the load received from the jack J.
[0039]
Further, the pressure data difference Pa−Pb is an equivalent pressure of the spring reaction force of the spring 15 and also indicates the position of the free piston 12.
[0040]
And since the cross-sectional area and oil amount of each oil chamber 7,13,14 are clear, a vehicle height state is calculated | required by the calculation in the controller 23, Therefore The difference with the preset appropriate vehicle height can also be grasped | ascertained.
[0041]
Further, in order to achieve the appropriate vehicle height, for example, the amount of oil to be sent from the second oil chamber 14 to the oil chamber 7 of the jack J can be calculated, and the adjustment value of the pressure data difference Pa-Pb can be set. . Therefore, the vehicle height can be adjusted to an appropriate state.
[0042]
That is, the vehicle height position is confirmed and finely adjusted with the pressure data Pa and Pb, and stopped at an appropriate position.
[0043]
FIG. 2 shows another embodiment of the present invention, which differs from FIG. 1 in that the present invention is applied not to the rear wheel suspension A but to the front wheel suspension B as a front fork.
[0044]
The front wheel side suspension B has a support structure in which an inner tube 25 is inserted into an outer tube 24 and a lower oil chamber 26 is partitioned in the outer tube 24.
[0045]
From the center of the bottom surface of the outer tube 24, a center tube 28 having a lower end fixed by a fork bolt 27 extends up and extends inside the inner tube 25, and an inner tube is formed by a piston 29 formed at the upper end of the center tube 28. 25 is partitioned into an oil storage chamber 30 and an upper oil chamber 31.
[0046]
The lower oil chamber 26 passes through the oil hole 32 for generating the compression side damping force formed in the center tube 28, and the upper oil chamber 31 similarly passes through the oil hole 33 for generating the extension side damping force to the oil storage chamber 30 in the inner tube 2. As a result, the upper and lower oil chambers 31 and 26 communicate with each other through the oil holes 32 and 33 for generating the compression side and extension side damping force.
[0047]
A suspension spring 34 is interposed in the oil storage chamber 30 between the inner tube 25 and the piston 29. The spring load of the suspension spring 34 causes the inner tube 25 and the outer tube 24 to extend in the extending direction. Energized.
[0048]
The upper portion of the inner tube 25 is connected with a bracket (not shown), and is pivotally attached to the vehicle body through a steering shaft provided on the bracket. The front wheel is supported by the lower end of the outer tube 24, and the front wheel is supported. Elastically supports the front of the vehicle body.
[0049]
Further, the end of the suspension spring 34 is supported by a hydraulically driven pressing member 35, pressure oil is supplied to the pressing member 35 from the outside, and the preload is increased while the suspension spring 34 is compressed by the pressing member 35. The compression operation of the inner tube 25 and the outer tube 24 can be suppressed.
[0050]
Here, a free piston is used as the pressing member 35, and this free piston is disposed with an oil chamber 36 formed at the upper end of the oil storage chamber 30 in the inner tube 25, and the end portion of the suspension spring 34 on the opposite surface Is carried.
[0051]
Further, the oil chamber 36 communicates with the second oil chamber 14 of the external hydraulic screw pump 9 via an oil passage 37.
[0052]
Accordingly, when hydraulic oil is supplied from the oil chamber 14 to the oil chamber 36 and the hydraulic pressure acts on the pressing member 35, the inner tube 25 is biased in the extending direction via the suspension spring 34.
[0053]
That is, the inner tube 25, the pressing member 35, and the oil chamber 36 constitute a hydraulic jack J that supports the vehicle body via the suspension spring 34.
[0054]
In this embodiment, for example, when a load is applied such that the front part of the vehicle body sinks due to a braking operation in hill running, the inner tube 25 sinks into the outer tube 24, and the pressing member is interposed via the suspension spring 34. 35 moves upward relative to the inner tube 25.
[0055]
For this reason, the oil pressure in the oil chamber 36 rises, the oil pressure in the second oil chamber 14 of the hydraulic screw pump 9 also rises via the oil passage 37, and the hydraulic pressure difference from the first oil chamber 13 and the spring 15. The free piston 12 is moved by a predetermined amount with the equivalent pressure of the spring reaction force.
[0056]
On the other hand, the pressures in the first oil chamber 13 and the second oil chamber 14 are detected by the pressure sensors 21 and 22, and the controller 23 detects these detection signals, the cross-sectional areas of the oil chambers 13, 14, and 36, and the oil amount data. , The vehicle height state is calculated, and a difference from a preset appropriate vehicle height is obtained, the required amount of hydraulic oil corresponding to the difference is calculated, and the adjustment value of Pa-Pb is set.
[0057]
For this reason, the electric motor 18 is driven forward, for example, by the number of rotations (or drive time) corresponding to the control amount corresponding to the adjustment value of Pa-Pb, for example, and the piston 11 is moved right into the cylinder 10 via the speed reducer 19. Let go.
[0058]
Due to the right row of the piston 11, the pressure in the first oil chamber 13 is increased, and the free piston 12 is caused to move right according to the differential pressure with the second oil chamber 14.
[0059]
For this reason, the hydraulic oil in the second oil chamber 14 is supplied to the oil chamber 36 in the inner tube 25 constituting the jack through the oil passage 37, and the oil pressure in the oil chamber 36 is increased.
[0060]
This hydraulic pressure functions to raise the inner tube 25 with respect to the outer tube 24 via the suspension spring 34.
[0061]
That is, it is possible to automatically suppress the sinking of the front wheel side suspension when traveling on a slope and maintain the vehicle body posture in an appropriate posture.
[0062]
That is, as in FIG. 1, the vehicle body posture is confirmed and finely adjusted with the pressure data Pa and Pb and stopped at the proper posture position.
[0063]
FIG. 3 shows another embodiment of the present invention. The difference between this embodiment and that shown in FIG. 1 is that the hydraulic screw pump 9 shown in FIG. A hydraulic screw pump 40 in which a piston 11 defining a third oil chamber 39 is slidably provided in one cylinder 38; and a first oil chamber 13 and a second oil chamber in a second cylinder 41. This is a point separated into a metering cylinder 42 having a free piston 12 slidable by dividing 14.
[0064]
The oil chamber 39 in the first cylinder 38 and the first oil chamber 13 in the second cylinder 41 communicate with each other through an oil passage (pipe) 43.
[0065]
The vehicle body posture adjusting apparatus according to this embodiment has basically the same vehicle body posture adjusting operation as that shown in FIG. 1, and a duplicate description thereof is omitted here.
[0066]
Further, by adopting a configuration in which the hydraulic screw pump 40 and the metering cylinder 42 separated as described above are connected by an oil passage 49, the mounting position on these vehicles can be freely selected, and the compact size can be reduced. It is possible to equip a motorcycle with the vehicle height posture device.
[0067]
Moreover, the advantage that the maintenance of each part becomes easy is obtained.
[0068]
FIG. 4 shows still another embodiment of the present invention, which replaces the driving means D and the hydraulic screw pump 40 shown in FIG. 3 with the external hydraulic source 44 and the first of the metering cylinder 42. A hydraulic supply valve 45 and a hydraulic discharge valve 46 that control the supply and discharge of hydraulic oil to and from the oil chamber 13 are used.
[0069]
Here, as the hydraulic power source 44, a hydraulic power source having a pump / relief / unload function or an accumulator is used.
[0070]
The hydraulic pressure supply valve 45 is connected in the middle of an oil passage (pipe) 47 connecting the hydraulic pressure source 44 and the first oil chamber 13 of the metering cylinder 42, and the hydraulic discharge valve 46 is connected to the first oil chamber. 13 and an oil tank 49 connected to the oil tank 48.
[0071]
The hydraulic source 44, the hydraulic supply valve 45, and the hydraulic discharge valve 46 are switched in operation under the control of the controller 23.
[0072]
That is, the controller 23 calculates the current vehicle height based on the pressure data from each of the pressure side sensors 21 and 22 in the same manner as described above, and further uses the calculated vehicle height as data for setting the appropriate vehicle height in advance. Based on this data, the control current for the operation of the hydraulic power source 44 and the on / off operation of the hydraulic pressure supply valve 45 and the hydraulic pressure discharge valve 46 is supplied corresponding to the on / off time, for example.
[0073]
Accordingly, for example, when the rear wheel suspension receives a force in a direction in which the rear wheel side suspension contracts as the vehicle body descends due to two-seaters or loading of luggage, the meter increases as the pressure in the oil chamber 7 of the hydraulic jack J increases. The oil pressure acting on the first oil chamber 13 and the second oil chamber 14 of the ring cylinder 42 also changes, and this change is detected by the first pressure sensor 21 and the second pressure sensor 22.
[0074]
The controller 23 calculates data for setting the current vehicle height to a preset appropriate vehicle height according to the pressure difference, and opens the hydraulic pressure supply valve for the calculated time in a state in which the hydraulic power source 44 is operated. During this time, the hydraulic discharge valve 46 is closed.
[0075]
For this reason, hydraulic fluid is supplied from the hydraulic pressure source 44 to the first oil chamber 13, and the free piston 12 moves in a direction in which the second oil chamber 14 is compressed.
[0076]
As a result, the hydraulic oil in the second oil chamber 14 is pressed into the oil chamber 7 of the hydraulic jack J, and the cylinder-side spring receiver 5 is lifted upward. For this reason, the force which lifts a vehicle body upward via the rod side spring receiver 3 and the bracket 4 acts via the suspension spring 8.
[0077]
Accordingly, it is possible to prevent the front wheel side from sinking due to two-seaters on the two-wheeled vehicle or loading of luggage, and the vehicle body posture can be maintained in an appropriate state.
[0078]
That is, as in FIG. 1, the vehicle body posture is confirmed and finely adjusted with the pressure data Pa and Pb, and stopped at an appropriate position.
[0079]
FIG. 5 shows the rear wheel side suspension A as shown in FIG. 1 and the front wheel side suspension B as shown in FIG.
[0080]
According to this, it is possible to suppress the depression on the front wheel side due to the braking operation on the slope traveling and the depression on the rear wheel side due to the two-seater riding independently or simultaneously.
[0081]
Further, it is not necessary to provide the controller 23 for each of the suspensions A and B, so that the occupation rate of the installation space as the vehicle body posture adjusting device can be suppressed and the cost can be reduced.
[0082]
As described above, according to the above-described embodiments, even when the vehicle body posture changes greatly due to two-seaters, cargo loading, traveling on a slope, etc., this vehicle body posture can be automatically adjusted to an appropriate posture. For example, it is possible to prevent an oncoming vehicle accident from being caused by directing the headlamp vertically at an abnormal angle and directly hitting the driver of the oncoming vehicle.
[0083]
In addition, since fluctuations in the vehicle body posture are suppressed, the damping force of the front wheel side suspension and the spring constant of the suspension spring, and the steady damping force of the rear wheel side suspension and the spring constant of the suspension spring can be reduced. The amount of operation of each suspension of the front and rear wheels on a wavy road can be set large, and the riding comfort can be improved.
[0084]
Further, the oil passages 16, 43, 47 as pipe lines between the suspensions A, B and the hydraulic screw pump 9, the metering cylinder 42, and between the metering cylinder 42, the hydraulic screw pump 40, and the hydraulic power source 44. By adopting the configuration of connecting with, the setting of the equipment space in these vehicle bodies becomes easy.
[0085]
The pressure sensors 21 and 22 are small and light, and can be easily mounted on the hydraulic screw pump 9 and the meter ring 42, and can be installed without deteriorating the appearance.
[0086]
【The invention's effect】
As described above, according to the present invention, the suspension comprising the damper and the suspension spring provided between the vehicle body and the axle, the hydraulic jack installed on the damper side and carrying one end of the suspension spring, A hydraulic screw pump having a free piston that divides the inside of the cylinder into a first oil chamber and a second oil chamber; and provided in the second oil chamber, the free piston being directed toward the first oil chamber A first spring is provided between the free piston and an urging spring, an oil passage connecting the second oil chamber and the oil chamber of the hydraulic jack, and a free piston. And a drive means having an output shaft screwed into a rod integral with the piston. The controller includes a first oil chamber and a second oil. Chamber pressure The vehicle height is calculated based on the outputs of the first pressure sensor and the second pressure sensor to be known, and the drive amount of the drive means is controlled so that the vehicle height is set to a preset appropriate vehicle height. As a result, the screw pump is driven by the driving means so that the calculated value of the output of the pressure sensor, for example, the detected pressure difference of each pressure sensor becomes the set value, thereby the second oil chamber and the hydraulic jack By performing hydraulic oil supply / discharge control with the oil chamber, the vehicle height can be adjusted to a set level.
[0087]
Also, a metering cylinder partitioned into a first oil chamber and a second oil chamber by a free piston and the second oil chamber are provided to urge the free piston toward the first oil chamber. An axially slidable partitioning a spring, an oil passage connecting the second oil chamber and the oil chamber of the hydraulic jack, and a third oil chamber communicating with the first oil chamber in a cylinder A hydraulic screw pump having a piston and a driving means having an output shaft screwed into a rod integral with the piston, and the controller is configured to control the pressure of the first oil chamber and the second oil chamber. The vehicle height is calculated based on the outputs of the first pressure sensor and the second pressure sensor to be detected, and the drive amount of the drive means is controlled so that the vehicle height is set to a preset appropriate vehicle height. So that the height of the vehicle The pressure changes in the first oil chamber and the second oil chamber of the hydraulic screw pump accompanying the change in the indoor pressure can be detected by each one pressure sensor, and the calculated values of these pressure sensors, for example, the detection of the pressure sensor The screw pump is driven by the driving means so that the pressure difference becomes a set value, and thereby the hydraulic pressure in the third oil chamber of the hydraulic screw pump is supplied to and discharged from the first oil chamber in the metering cylinder. The vehicle height can be adjusted to an appropriate level as described above.
[0088]
Furthermore, a hydraulic source connected to the first oil chamber of the metering cylinder via a hydraulic supply valve, and an oil tank connected to the first oil chamber via a hydraulic discharge valve are provided to the controller. The vehicle height is calculated based on the outputs of the first pressure sensor and the second pressure sensor for detecting the pressures of the first oil chamber and the second oil chamber, and the vehicle height is set in advance. Since the hydraulic pressure supply valve and the hydraulic pressure discharge valve are controlled to open and close so as to be high, the hydraulic pressure supply / discharge control is performed directly from the hydraulic pressure source to the first oil chamber of the metering cylinder, and the hydraulic jack The operation can be controlled at high speed.
[0089]
Also, suspensions are provided on the front and rear sides of the vehicle body, and the hydraulic jacks for each suspension are controlled by a hydraulic screw pump or metering cylinder driven by each driving means under the control of one controller. As a result, the number of installed controllers can be reduced, and therefore the occupied space in the vehicle body can be minimized.
[0090]
An inner tube that is configured to form a suspension and is attached to one of the vehicle body side and the axle side, and is slidably provided in the inner tube, and on the outer tube side that is attached to the other of the vehicle body side and the axle side. Since the pressing member supported via the suspension spring and the oil chamber partitioned in the inner tube by the pressing member are provided so that the oil chamber communicates with the second oil chamber of the hydraulic screw pump. The vehicle height can be adjusted using a vehicle height adjusting mechanism incorporated in the inner tube of the suspension.
[Brief description of the drawings]
FIG. 1 is a configuration diagram conceptually showing a body posture adjusting device for a two-wheeled vehicle according to an embodiment of the present invention.
FIG. 2 is a block diagram conceptually showing a vehicle body posture adjusting apparatus for a two-wheeled vehicle according to another embodiment of the present invention.
FIG. 3 is a block diagram conceptually showing a vehicle body posture adjusting apparatus for a two-wheeled vehicle according to another embodiment of the present invention.
FIG. 4 is a block diagram conceptually showing a vehicle body posture adjusting apparatus for a two-wheeled vehicle according to another embodiment of the present invention.
FIG. 5 is a block diagram conceptually showing a vehicle body posture adjusting apparatus for a two-wheeled vehicle according to another embodiment of the present invention.
[Explanation of symbols]
A Rear wheel side suspension constituting the suspension
B Front wheel side suspension
J hydraulic jack
7 Oil chamber
8 Suspension spring
9, 40Hydraulic pump
10, 38, 41 cylinders
11, 29 piston
12 Free piston
13 First oil chamber
14 Second oil chamber
15 Spring
16, 37, 43, 47, 49 Oil passage (pipe)
17 Rod
18 Electric motor
19 Reducer
20 Output shaft
21 First pressure sensor
22 Second pressure sensor
23 Controller
24 Outer tube
25 Inner tube
28 Rod
30 Oil storage room
35 Pressing member
36 Oil chamber
39 Third oil chamber
42 Metering cylinder
44 Hydraulic source
45 Hydraulic supply valve
46 Hydraulic discharge valve
48 Oil tank

Claims (5)

A suspension comprising a damper and a suspension spring provided between the vehicle body and the axle, a hydraulic jack installed on the damper side and carrying one end of the suspension spring, a first oil chamber and a first in the cylinder A hydraulic pump having a free piston partitioned into two oil chambers, a spring provided in the second oil chamber and biasing the free piston toward the first oil chamber, and the second oil chamber An oil passage connecting the oil chamber of the hydraulic jack and a piston of the hydraulic pump provided in the cylinder so as to be slidable in the axial direction and defining the first oil chamber between the free piston and Drive means having an output shaft screwed into a rod integral with the piston, a first pressure sensor for detecting the pressure of the first oil chamber, and a first for detecting the pressure of the second oil chamber . Two pressure sensors; A controller for calculating the vehicle height based on the outputs of the first pressure sensor and the second pressure sensor, and for controlling the drive amount of the drive means so that the vehicle height is set to an appropriate vehicle height set in advance; A body posture adjusting device for a two-wheeled vehicle comprising the two-wheeled vehicle. A suspension comprising a damper and a suspension spring provided between the vehicle body and the axle, a hydraulic jack installed on the damper side and supporting the vehicle body via the suspension spring, a first oil chamber and a free piston A metering cylinder partitioned into a second oil chamber; a spring provided in the second oil chamber for biasing the free piston toward the first oil chamber; the second oil chamber; an oil passage that connects the oil chamber of the hydraulic jack, a hydraulic pump having an axial slidable piston which divides the third oil chamber communicated with the first oil chamber in the cylinder, the piston Driving means having an output shaft screwed to a rod integral with the first pressure sensor, a first pressure sensor for detecting the pressure of the first oil chamber, and a second pressure for detecting the pressure of the second oil chamber. A sensor and the first pressure sensor; And a controller for calculating the vehicle height based on the outputs of the sensor and the second pressure sensor and controlling the drive amount of the drive means so that the vehicle height is set to an appropriate vehicle height set in advance. A vehicle body posture adjustment device for a two-wheeled vehicle. A suspension comprising a damper and a suspension spring provided between the vehicle body and the axle, a hydraulic jack installed on the damper side and carrying one end of the suspension spring, and a first piston and a first piston by a free piston A metering cylinder partitioned into two oil chambers, a spring provided in the second oil chamber and biasing the free piston toward the first oil chamber, the second oil chamber, and the hydraulic pressure An oil passage connecting the oil chamber of the jack, a hydraulic pressure source connected to the first oil chamber via a hydraulic supply valve, and an oil tank connected to the first oil chamber via a hydraulic discharge valve A first pressure sensor for detecting the pressure in the first oil chamber, a second pressure sensor for detecting the pressure in the second oil chamber , the first pressure sensor and the second pressure sensor Calculate vehicle height based on each output Body attitude adjustment device two-wheeled motor vehicle, characterized in that a controller for controlling opening and closing the oil pressure supply valve and hydraulic discharge valve to the appropriate vehicle height is set to 該車 height advance. The suspension is a front wheel side suspension and a rear wheel side suspension respectively provided on the front and rear of the vehicle body, and each hydraulic jack for each of the front wheel side suspension and the rear wheel side suspension is controlled by a single controller. 4. The body posture adjusting device for a two-wheeled vehicle according to claim 1, wherein the operation is controlled by a hydraulic pump or a metering cylinder driven by the means. An inner tube configured to constitute a suspension and attached to one of the vehicle body side and the axle side, and slidably provided in the inner tube, and suspended on the outer tube side attached to the other of the vehicle body side and the axle side A hydraulic pump having a pressing member supported through a spring, an oil chamber partitioned in the inner tube by the pressing member, and a free piston partitioning the cylinder into a first oil chamber and a second oil chamber And an oil passage that is provided in the second oil chamber and connects the spring that biases the free piston toward the first oil chamber, and the second oil chamber and the oil chamber in the inner tube. If, provided axially slidably within the cylinder, and the piston of the hydraulic pump that divides the first oil chamber between the free piston, the piston A second pressure sensor for detecting a driving means having an output shaft which is screwed into the rod integrated, a first pressure sensor for detecting the pressure of the first oil chamber, the pressure of the second oil chamber And calculating the vehicle height based on the outputs of the first pressure sensor and the second pressure sensor, and controlling the driving amount of the driving means so that the vehicle height is set to a preset appropriate vehicle height. A body posture adjusting device for a two-wheeled vehicle comprising a controller.

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