JPH0874912A - Oil damper - Google Patents

Abstract

PURPOSE: To secure an enough space between a truck and a car body and prevent deterioration of a detecting part due to leaked oil by forming a damper part integral with a damping valve and a reservoir chamber and holding an oil sump container at a lower end of a stroke sensor. CONSTITUTION: A damper part D is taken as a structure in which a dumping value 24 and a reservoir chamber R3 are integrally formed. Damping force is caused at a designated pressure side or an extending side when the oil flowed in this reservoir chamber R3 passes the damping value 24. A sensor cartridge 12 forming a sensor mechanisms detects a piston strode by slidably contacting a detecting part 12a with an outer periphery of a piston rod 22. A housing 11 in which the sensor cartridge 12 is mounted has an oil sump container 14 removal held at its lower end. This oil sump container 14 is formed out of a light transmissible material and detects leaked oil in an annular gap 11a on which the detecting part 12a of the sensor cartridge 12 is disposed. Quantity of the leaked oil can be visibly observed by a display 14a for visibly observing stored amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil damper, and more particularly to an oil damper that is installed horizontally and equipped with a displacement sensor.

[0002]

2. Description of the Related Art As is well known, in a vehicle traveling at a high speed, it is considered that controlling the rolling of the vehicle body with respect to a carriage makes it possible to improve the riding comfort and further speed up the vehicle. ing.

In order to control the rolling of the vehicle body with respect to the carriage, it has been proposed to use a hydraulic cylinder that is horizontally placed as shown in FIG. 2, for example. A sensor mechanism S that detects the amount of expansion and contraction displacement of the cylinder portion C is attached to the portion C.

That is, the cylinder portion C is, for example, connected to the trolley side, which is the fixed side, and the body side, which is the movable side, and is inserted into the cylinder body 1 so that its tip side can be retracted. And a rod side chamber R1 and a piston side chamber R2 which are slidably accommodated in the cylinder body 1 at the tip of the rod body 2. It is supposed that the piston portions 3 that form the compartments are connected in series.

The rod-side chamber R1 is formed through the port 1a formed in the cylinder body 1 and the external oil passage L1, and the piston-side chamber R2 is formed in the cylinder body 1 and the external oil passage L1. It is also assumed that the hydraulic pressure source P or the tank T, which is also externally provided, is communicated with the hydraulic valve P, which is also provided externally, via a control valve V which is externally provided.

On the other hand, in this conventional example, the sensor mechanism S has a stroke sensor structure in which the rod body 2 is set to a magnetic scale, and the sensor mechanism S is connected to the housing 11 which is connected to the so-called open end side of the cylinder body 1. Cartridge 1
It is configured to hold 2.

At this time, the sensor cartridge 12 is arranged on the upper half side of the housing 11, and the rod body 2
It is considered that the detection portion 12a that contacts the outer periphery of the rod is positioned on the so-called upper side of the rod body 2.

The oil leaking from the inside of the cylinder body 1 which may be attached to the outer circumference of the rod body 2 and attached to the detection portion 12a is formed in the annular gap 11a formed on the outer circumference of the rod body 2.
It is designed to be guided inside and to be accommodated in a port 11b which is opened on the lower half side of the housing 11 so as to communicate with the annular gap 11a and whose lower end is closed by a plug 13.

Incidentally, the port 11b is connected to the housing 1 by
It is formed in order to avoid so-called overcrowding at the time of assembling the sensor cartridge 12 to the 1 and the like, but by providing this on the lower half side of the housing 11,
It is designed so that it can be diverted to the above-mentioned oil leakage accommodating portion.

The plug 13 screwed into the housing 11 as a so-called plug has a port 13a communicating with the port 11b, as shown by a broken line in the drawing.
The oil leak in the port 11b may be returned to the tank T via the port 13a.

Therefore, in the conventional hydraulic cylinder formed as described above, the control valve V is appropriately controlled on the basis of the position detected by the sensor mechanism S, and the pressure oil from the hydraulic source P is supplied. By setting so that the rod side chamber R1 or the piston side chamber R2 in the cylinder body 1 can be selectively supplied, the cylinder pressure of the expansion pressure can be selectively controlled, and as a result, the cylinder is connected to the hydraulic cylinder. It is possible to control the rolling of the vehicle body with respect to the bogie between the car body and the bogie being operated.

[0012]

However, when the above-mentioned conventional hydraulic cylinder is used to control the rolling of the vehicle body with respect to the bogie in the rail running vehicle, the following inconveniences are pointed out.

That is, first, when the hydraulic cylinder is mounted on a rail running vehicle which is an actual vehicle, in addition to the arrangement of the hydraulic cylinder, the oil passages L1 and L2 and the control valve communicating with the oil passages L1 and L2 are provided. It is necessary to secure a space for disposing the V, the hydraulic pressure source P connected to the control valve V, the tank T, and the like.

However, in a railroad traveling vehicle, there is generally no space between the bogie and the vehicle body. Considering this, in addition to the hydraulic cylinders, the oil passages L1 and L are provided.
It is actually difficult to dispose the control valve 2 and the control valve V, and there is a danger that they cannot be used.

Further, when the above-mentioned control valve V and the like are provided, it is necessary to consider protection against so-called stone splashes, and when a protective cover is attached for that purpose, visual inspection is required. Inconveniences that make work difficult are introduced.

Next, in the sensor mechanism S in the conventional hydraulic cylinder described above, the cylinder body 1 may be attached to the outer periphery of the rod body 2 and then attached to the detection portion 12a.
Although it is said that the oil leaked from the inside is finally accommodated in the opening 11b of the housing 11, the so-called leak amount at that time is inconvenient.

Therefore, it is impossible to know in advance that the oil leaks too much to infiltrate the detecting portion 12a, which causes deterioration of the detecting portion 12a due to the oil leak and deterioration of the detecting portion 12a. There is a fear that the function of the stroke sensor may be deteriorated and the predetermined stroke sensor mechanism may not be obtained.

When the port 11b is set as a drain port communicating with the tank T so that the oil leakage does not infiltrate the detecting portion 12a, the pipe is connected to the plug 13, and as described above. There is a danger of increasing the inconvenience such as difficulty in installation and installation of a protective cover.

The present invention was devised in view of the above circumstances, and its purpose is to provide a new optimum for effectively controlling the rolling of the vehicle body with respect to the bogie in the railroad traveling vehicle. The purpose is to provide an oil damper having a configuration.

[0020]

In order to achieve the above-mentioned object, the structure of the present invention has a structure in which a damper portion, which is a main body portion disposed laterally between a fixed side and a movable side, is a cylinder and A sensor mechanism is provided on the upper half side of the housing connected to the cylinder, which has a piston rod protruding and retracted from the cylinder, and is connected to the damper part to detect the displacement amount of the piston rod with respect to the cylinder. In an oil damper having a sensor cartridge that is in contact with the outer periphery of the piston rod and is in contact with the outer periphery of the piston rod, the damper unit is configured to have a damping valve and a reservoir chamber integrally, while the sensor mechanism is It has an oil storage container that is detachably held at the lower end, and is formed inside the housing so that the detection part of the sensor cartridge is present inside the oil storage container. Leakage oil through a port communicating with the annular gap and is housed.

[0021] Specifically, it is assumed that the port is opened on the lower half side of the housing and set as a drain port.

Preferably, the oil sump container is formed of a light-transmissive material, has an indicator for visually recognizing the amount of oil leakage, and is housed in a separable protective cover. It will be.

[0023]

Therefore, when the oil damper is disposed between the vehicle body and the bogie in the railroad traveling vehicle, for example, the cylinder constituting the damper part is connected to the bogie side which is the fixed side, and the damper part is connected together with the cylinder. The constituent piston rod is connected to the movable body side.

At this time, the oil damper has a structure in which the damper portion integrally has the damping valve and the reservoir chamber, and when the oil damper is arranged between the vehicle body and the bogie of the railroad traveling vehicle, the oil damper is further extended. Does not require space.

At the time of expansion / contraction of the damper part in which the piston rod is projected / retracted with respect to the cylinder, the protrusion / retraction amount of the piston rod with respect to the cylinder, that is, the stroke amount of the piston rod with respect to the cylinder is detected by the detection part of the sensor cartridge constituting the sensor mechanism. , For example, as an input signal to the CPU.

Further, for example, when the damping valve in the damper section is configured to vary the generated damping force by a signal from the outside, for example, the damping signal in the damper section can be increased or decreased by a command signal from the CPU. Can be adjusted.

On the other hand, in the sensor mechanism, oil is leaked from the inside of the cylinder to the outer circumference of the piston rod to be attached to the outer circumference of the piston rod due to the piston rod protruding and retracting with respect to the cylinder, and to be attached to the detection portion of the sensor cartridge. Through the annular gap formed therein and into the port which is the drain port, and is accommodated in the oil reservoir through the port.

At this time, since the oil reservoir is made of a light-transmissive material, the leaked oil is stored in the oil reservoir, that is, the detecting portion of the sensor cartridge is present. It is possible to visually confirm that oil leakage is being introduced into the annular gap, and the oil storage container has a display for visually recognizing the amount of oil leakage, so that the amount of oil leakage can be visually recognized.

As a result, it is possible to accurately determine the time to discard the leaked oil in the oil reservoir or the time to replenish the damper part with oil.

Further, when the oil sump container is accommodated in a separably attached protective cover, it is possible to protect against so-called stone splash when mounted on an actual rail running vehicle.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on the illustrated embodiments. Even in the oil damper according to this embodiment, like the hydraulic cylinder of the conventional example described above, the vehicle body of a railroad traveling vehicle will be described. It is placed in a horizontal position between the trolley and the trolley, and is used as a device for controlling the rolling of the vehicle body with respect to the trolley.

The oil damper is, for example, a damper portion D, which is a main body portion disposed horizontally between a fixed side, which is a truck side, and a movable side, which is a vehicle body side, and is connected to the damper portion D. The sensor mechanism S that functions as a stroke sensor
And.

In this embodiment, the damper part D is formed to have a one-way flow structure. The damper part D is connected to the trolley side, which is the fixed side, and the cylinder part, which is connected to the vehicle body side, which is the movable side. 21 and a piston rod 22 through which the front end side is retractably inserted,
At the tip of the piston rod 22, a piston portion 2 is slidably accommodated in the cylinder 21 and defines a rod side chamber R1 and a piston side chamber R2 in the cylinder 21.
It is said that 3 will be installed in series.

Further, the damper part D has a reservoir chamber R3 formed outside the cylinder 21, and in particular, when the damper part D is arranged in a horizontal position as described above,
The oil level O in the reservoir chamber R3 is the rod side chamber R1.
It is set so as to be positioned above the piston side chamber R2.

The rod-side chamber R1 communicates with the reservoir chamber R3 via a damping valve 24 disposed on the so-called open end side of the cylinder 21, and the reservoir chamber R3 is connected to the cylinder chamber 21.
It is said that the piston side chamber R2 is communicated with the check valve 25 disposed on the so-called bottom end side.

Further, the piston portion 23, which divides and forms the rod side chamber R1 and the piston side chamber R2, checks the valve 2 which allows the piston side chamber R2 to communicate with the rod side chamber R1.
Have six.

Therefore, in the damper part D according to this embodiment, the damper part D is constructed so as to integrally have the damping valve 24 and the reservoir chamber R3. No further space is required when it is arranged between them, which is advantageous in terms of so-called mountability as compared with the case where the conventional hydraulic cylinder is mounted.

In the damper section D, when the piston rod 22 is extended and retracted with respect to the cylinder 21, the oil in the piston side chamber R2 is passed through the check valve 26 provided in the piston section 23. It flows into the rod side chamber R1.

At this time, a shortage of oil in the piston side chamber R2 is replenished from the reservoir chamber R3 via the check valve 25.

A so-called surplus oil of the oil flowing into the rod side chamber R1 is stored in the reservoir chamber R via the damping valve 24.
When the oil flowing into the reservoir chamber R3 passes through the damping valve 24, a predetermined compression side or expansion side damping force is generated.

At this time, in the case where the damping valve 24 is constructed so that the generated damping force can be varied by a signal from the outside, for example, a signal from a sensor mechanism S, which will be described later, is used by the damping valve 24. By adjusting the level of the generated damping force, it becomes possible to realize a preferable generation state of the damping force.

In this embodiment, the sensor mechanism S is basically constructed in the same manner as the above-mentioned conventional example. Therefore, the parts having the same structure are designated by the same reference numerals in the drawings. The detailed description thereof will be omitted, and the different points in this embodiment will be mainly described below.

That is, first, in the sensor cartridge 12 constituting the sensor mechanism S, the damper portion D has the cylinder 2
Since the piston rod 22 is projected and retracted with respect to 1, the detection portion 12a is slidably contacted with the outer circumference of the piston rod 22.

In this embodiment as well, the piston rod 22 is of course set on a magnetic scale.

Next, the housing 11 in which the sensor cartridge 12 is provided has an oil reservoir container 14 which is detachably held at the lower end thereof, and the oil reservoir container 14 has the sensor cartridge 12 inside thereof. It is set so as to accommodate oil leakage from the inside of the cylinder 21 that collects in the annular gap 11a formed inside the housing 11 so that the detection portion 12a of FIG.

That is, in this embodiment, the housing 1
1 is opened on the lower half side and its upper end is the annular gap 11a.
The port 11b that is communicated with is set as a drain port, and the lower end thereof is communicated with the oil reservoir 14.

In the present embodiment, the oil reservoir 14 is made of a light-transmissive material and has a display 14a for visually recognizing the amount of leaked oil.

Incidentally, in the illustrated example, the display 14a is a recess formed by linearly cutting the outer peripheral surface of the oil reservoir 14 in the circumferential direction, but instead of this, It may be a convex portion formed in a rib shape in the circumferential direction on the outer peripheral surface of the oil sump container 14, or may be a line in which paint is written in the circumferential direction on the outer peripheral surface of the oil sump container 14.

However, in the case of the so-called concave structure as in the embodiment, it does not hinder the interposition of the protective cover 15, which will be described later, and avoids in advance the problem that it easily disappears due to abrasion or the like. It is advantageous in that it can be done.

In this embodiment, the oil reservoir 14 is housed in a protective cover 15 which is detachably attached to the lower end of the housing 11. It is needless to say that the interposition is not always required, and thus the interposition may be omitted.

However, when the protective cover 15 is provided as in the embodiment, it is advantageous in that the sensor mechanism S can be protected against so-called stone splash when the sensor mechanism S is mounted on an actual vehicle. .

Therefore, as described above, since the sensor mechanism S according to this embodiment has the oil reservoir 14 detachably held at the lower end of the housing 11, the sensor mechanism S is removed from the inside of the cylinder 21. The oil leakage is not stored in the annular gap 11a but is stored in the oil reservoir 14 and the oil leakage does not infiltrate the detection portion 12a of the sensor cartridge 12 in advance. .

Further, since the so-called capacity of the oil sump container 14 can be set larger than that of the port 11b which is the drain port above the oil sump container 14, even if a considerable amount of oil leakage is caused, the oil leakage can be caused by the oil leakage. The inconvenience of infiltration due to oil leakage of the detection unit 12a described above can be eliminated in advance.

Since the oil reservoir 14 is made of a light-transmissive material, the annular gap 11a is formed.
The fact that oil leakage has been introduced into the inside can be easily visually recognized, and so-called measures can be taken after that.

Further, when the oil reservoir 14 has the indicator 14a for visually recognizing the amount of oil leakage, the amount of oil leakage in the annular gap 11a can be confirmed and therefore the oil reservoir can be confirmed. It is possible to accurately determine the time to discard the leaked oil in 14 or the time to replenish the damper part D with oil.

Further, since the oil reservoir 14 has a sufficient procedure for avoiding so-called overcrowding when assembling the sensor cartridge 12 into the housing 11, etc., as in the above-mentioned conventional example. It is also advantageous in that the plug 13 at the lower end of the port 11b does not need to be attached and detached in order to avoid overcrowding.

Therefore, in the oil damper according to this embodiment formed as described above, when the oil damper is arranged between the vehicle body and the bogie of the railroad traveling vehicle, for example, the damper portion D is formed. The cylinder 21 is connected to the trolley side which is the fixed side, and the piston rod 22 which constitutes the damper portion D is connected to the vehicle body side which is the movable side for use.

Then, the vehicle body swings with respect to the carriage, that is,
When the damper part D expands and contracts due to lateral rolling, the amount of protrusion / withdrawal of the piston rod 22 with respect to the cylinder 21, that is, the stroke amount of the piston rod 22 with respect to the cylinder 21 is detected by the detection part 12a of the sensor cartridge 12 constituting the sensor mechanism S. It is detected and used as an input signal to the CPU, for example.

Further, for example, when the damping valve 24 in the damper section D is configured to change the generated damping force by a signal from the outside, for example, a command signal from the CPU is used in the damper section D. The damping force can be adjusted to high or low.

Therefore, it becomes possible to generate an optimum damping force in accordance with the situation where the vehicle body rolls on the bogie.

On the other hand, in the sensor mechanism S, the oil leaks from the inside of the cylinder 21 in which the piston rod 22 is projected and retracted with respect to the cylinder 21 and is attached to the outer periphery of the piston rod 22 and attached to the detection portion 12a of the sensor cartridge 12. Through the annular gap 11a formed on the outer circumference of the piston rod 22 into the port 11b which is a drain port, and is accommodated in the oil reservoir 14 through the port 11b.

At this time, since the oil reservoir 14 is made of a light-transmissive material, leakage oil is stored in the oil reservoir 14, that is, the detecting portion 12a of the sensor cartridge 12 is It can be visually confirmed that oil leakage is introduced into the existing annular gap 11a, and the oil reservoir 14
Has a display 14a for visually recognizing the amount of oil leakage, it is possible to visually recognize the amount of oil leakage.

As a result, it is possible to accurately determine the time to discard the leaked oil in the oil reservoir 14 or the time to replenish the damper portion D with oil.

Further, when the oil sump container 14 is housed in the separable protective cover 15, it is possible to protect the sensor mechanism S from so-called stone splash when mounted on an actual vehicle. Become.

[0065]

As described above, according to the present invention, since the damper portion is set to have the structure in which the damping valve and the reservoir chamber are integrally formed, the damper portion is provided between the vehicle body and the bogie in the railroad traveling vehicle. There is an advantage in that it does not require any more space for disposing and is excellent in mountability.

Further, according to the present invention, when the damping valve in the damper section is configured to change the generated damping force by a signal from the outside, for example, based on the detection by the sensor mechanism, There is an advantage that the damping force generated by the damping valve can be adjusted to a high level or a low level, and a preferable generation state of the damping force can be realized.

Further, according to the present invention, in the sensor mechanism, the oil leaking from the inside of the cylinder extending to the detection portion of the sensor cartridge arranged in the housing is contained in the oil reservoir container which is detachably attached to the lower end of the housing. Therefore, there is an advantage that the deterioration of the detection unit due to the infiltration of the oil leakage and the functional deterioration due to the deterioration do not occur, and a predetermined stroke sensor mechanism can be permanently obtained.

At this time, since the oil reservoir is made of a light-transmissive material, it can be recognized that there is oil leakage, and it is possible to take advance measures so as not to cause the above-mentioned inconvenience. There are advantages.

Further, since the oil sump container has a display for visually recognizing the storage amount of the leaked oil, the amount of the leaked oil can be easily visually recognized, and after that, the leaked oil in the oil sump container is discarded. There is an advantage that it is possible to accurately determine the time when the oil is supplied and the time when the oil is supplied to the damper portion when required.

Further, when the oil sump container is housed in a separable protective cover, there is an advantage that it is possible to protect against so-called stone splash when mounted on an actual vehicle.

As a result, according to the present invention, it is optimal for effectively controlling the rolling of the vehicle body with respect to the bogie in the rail traveling vehicle.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing in principle an oil damper according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing an oil damper as a conventional example, similar to FIG.

[Explanation of symbols]

 11 Housing 11a Annular Gap 11b Port 12 Sensor Cartridge 12a Detection Part 14 Oil Storage Container 14a Display 15 Protective Cover 21 Cylinder 22 Piston Rod 24 Damping Valve D Damper R3 Reservoir Chamber S Sensor Mechanism

Front page continuation (72) Inventor Haruhiko Kawasaki 2-4-1, Hamamatsucho, Minato-ku, Tokyo World Trade Center Building Kayaba Industry Co., Ltd. (72) Inventor Yasuo Tsuruki 2-4-1, Hamamatsucho, Minato-ku, Tokyo No. World Trade Center Building Kayaba Industry Co., Ltd.

Claims (5)

[Claims] 1. A damper part, which is a main body part disposed laterally between a fixed side and a movable side, comprises a cylinder and a piston rod which is projected and retracted with respect to the cylinder, and the damper part. And a sensor mechanism for detecting the displacement of the piston rod with respect to the cylinder, which is arranged on the upper half side of the housing connected to the cylinder and has a sensor cartridge for sliding the detection portion onto the outer circumference of the piston rod. In the oil damper, the damper part is configured to have a damping valve and a reservoir chamber integrally, while
The sensor mechanism has an oil storage container detachably held at the lower end of the housing, and communicates with an annular gap formed inside the housing so that the detection portion of the sensor cartridge is present in the oil storage container. Oil damper characterized by containing oil leakage through a port 2. The oil damper according to claim 1, wherein the port is opened on the lower half side of the housing and set as a drain port. 3. The oil damper according to claim 1, wherein the oil reservoir is made of a light transmissive material. 4. The oil damper according to claim 1, wherein the oil reservoir has a display for visually recognizing the amount of leaked oil. 5. The oil damper according to claim 1, wherein the oil sump container is housed in a protective cover that is detachably attached.