JPH0514933Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a reservoir used in a hydraulic circuit, and in particular, a reservoir that is provided with a filter inside and accommodated in the reservoir by the filter. The present invention relates to a reservoir in which hydraulic fluid is purified.

[Prior art]

This type of reservoir is, for example,
This is proposed in Publication No. 35761. However, in the reservoir proposed in the same publication, the interior is divided into an upper chamber and a lower chamber by a filter, and an inflow port communicates with the upper chamber. The lower chamber is provided with an outflow port. Therefore, all the hydraulic fluid returned from the hydraulically operated equipment enters the upper chamber through the inlet, passes through the filter, flows into the lower chamber, and is supplied to the pump from the outlet.

[Problem that the invention attempts to solve]

In the conventional reservoir described above, all the working fluid supplied to the pump passes through the filter, so the working fluid is well purified, but the surface tension acting on the working fluid adhering to the filter, Atmospheric pressure may not act properly on the hydraulic fluid below the filter due to resistance, etc.
May reduce pump suction efficiency. When the filter is clogged or the amount of reflux liquid temporarily increases, the hydraulic fluid in the upper chamber gradually increases and the fluid level rises abnormally, resulting in a shortage of hydraulic fluid supplied to hydraulically operated equipment, and in the worst case, There is a risk of hydraulic fluid overflowing from the venting means of the cap attached to the fluid inlet. There is a problem.

[Means for solving problems]

The present invention was made to solve the above-mentioned problems. A liquid inlet is provided and an outlet connected to the pump is provided at the bottom, while a second
A filter is provided in the middle of the chamber, and the upper part of the filter communicates with an inlet connected to a hydraulically operated device operated by the hydraulic fluid discharged from the pump, and the upper part of the vertical partition wall. An upper chamber is formed that communicates with the upper part of the first chamber through a through hole provided in the vertical partition wall, and an upper chamber is formed below the filter that communicates with the lower part of the first chamber through a through hole provided in the lower part of the vertical partition wall. The filter is further characterized in that the filter is provided with a reservoir that extends upward for a predetermined length from the filter and directly communicates the upper and lower chambers.

[Functions and effects of the idea]

In the reservoir according to the present invention, the hydraulic fluid returned from the hydraulically operated device enters the upper chamber through the inlet, passes through the filter, flows to the lower chamber, and from the lower chamber passes through the through hole provided in the lower part of the vertical bulkhead to the lower chamber. Flows into the 1st room, the 1st
It is supplied to the pump through an outlet provided at the bottom of the chamber. Therefore, the working fluid supplied to the pump is effectively purified. Moreover, atmospheric pressure is applied above the hydraulic fluid in the first chamber by a venting means of a cap attached to a liquid inlet provided at the top of the hydraulic fluid, and atmospheric pressure is applied above the hydraulic fluid in the second chamber by a venting means of a cap attached to a fluid injection port provided at the top of the hydraulic fluid. Atmospheric pressure is applied through the through hole, and in particular, atmospheric pressure is applied to the hydraulic fluid below the filter through the vent provided in the filter. Therefore, all the working fluid in the reservoir flows smoothly, and the suction efficiency of the pump does not deteriorate.

In addition, even if the working fluid in the upper chamber gradually increases due to filter clogging or a temporary increase in the amount of reflux fluid to the reservoir, when the fluid level reaches a predetermined value, the vent hole provided in the filter The hydraulic fluid flows directly from the upper chamber to the lower chamber through the upper chamber, and the hydraulic fluid in the upper chamber flows into the first chamber through the through hole provided in the upper part of the longitudinal partition wall, thereby preventing an abnormal rise in the fluid level. Therefore, an appropriate amount of hydraulic fluid is supplied to the hydraulically operated device, and leakage of the fluid from the ventilation means of the cap attached to the fluid inlet can be prevented.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 10 schematically shows an actuator of an anti-skid device for an automobile, which includes a reservoir R, a hydraulic pump P, a motor M,
A power hydraulic pressure supply device consisting of a check valve V1, an accumulator A, a pressure switch S, a regulator valve V2, etc., and a solenoid valve V3.
a, V3b, V3c, cut valve-piston portion C1, C2, C3, bypass valve V4a, V4
a, V4c, etc., each wheel W1 to W4 (W1 is the left front wheel, W2 is the right front wheel, W3, W4 are the left and right rear wheels)
A brake hydraulic pressure control device is provided corresponding to each brake. This actuator is integrally assembled as shown in FIGS. 11 to 13, including a check valve V1, a regulator valve V2, and a cut valve-piston portion C.
1, C2, C3 and bypass valve V4b, V4
The base 11 is fixed to the body 10 in which the parts such as c and the like are assembled into the vehicle body (not shown).

The reservoir R contains a required amount of hydraulic fluid therein, is assembled to the body 10 via a bracket 12, and is connected to the inflow port P1 of the hydraulic pump P via an elastic suction hose 13. , the body 1 via the elastic return hose 14
Return boat 10a installed at
3b and V3c (which communicates with the exhaust port of V3c).

The internal structure of the hydraulic pump P is based on the actual application made in 1987-28799.
It is the same pump as the one proposed in (Utility Model Application Publication No. 62-138870, Utility Model Application Publication No. 4-8318) (the internal structure is not directly related to the gist of the present invention, so the explanation will be omitted), and it is integrated. mounts 15, 16, 17 and brackets 18, 1, which are vibration damping means, are
The discharge boat P2 is connected to the inflow port 10b provided in the body 10 via an elastic high-pressure hose 20. Therefore, the pressure fluid discharged from the hydraulic pump P is connected to the elastic high pressure hose 20 and the check valve V.
1 and stored in an accumulator A attached to the body 10. Note that the pressure fluid in the accumulator A is supplied to the cut valve-piston parts C1, C2, and C3 via the regulator valve V2 and the solenoid valves V3a, V3b, and V3c as needed, and is consumed (recirculated to the reservoir R). )
It's becoming like that.

In this embodiment, as shown in detail in FIGS. 1 to 9, the main body 30 of the reservoir R includes a lower body 31 and an upper body 32 made of polypropylene, a frame made of polypropylene, and a mesh made of stainless steel. These three members are assembled in a loop shape when the filter 33 is temporarily assembled on the loop-shaped stepped portion 32a of the atsupa body 32 (the end surfaces of the atsupa body 32 and the filter 33 are aligned). After melting only the surface with hot air from Chitsuso gas using a jig (not shown),
They are joined by pressure joining at the mating surfaces.
As a result, the Atsupa body 32, filter 33,
Since each end face of the lower body 31 is integrated, even if the dimensions change over time and a gap is formed between the peripheral edge of the filter 33 and the upper body 32, the hydraulic fluid will not pass through the filter 33 from the peripheral edge of the filter 33. The filter 33 is reliably prevented from falling.
This ensures that foreign substances in the hydraulic fluid are removed.

The lower body 31 has an elastic suction hose 13
an outlet 31a to which is connected, an inlet 31b to which elastic return hose 14 is connected, and a bracket 12.
A hook 31c for holding the bracket 12, a mounting hole 31d through which the bolt 21 screwed onto the nut 12a of the bracket 12 is inserted, and a mounting portion 31f for mounting the vertical wall 31e and a level warning device (not shown). A cylindrical protrusion 31g is provided at the inner opening of the outlet 31a to prevent foreign matter accumulated at the bottom from flowing into the outlet 31a.
is provided, and a vertical wall 3 is provided at the bottom of the vertical wall 31e.
A first chamber 41 and a second chamber 42 divided by 1e
A pair of through holes 31h and 31i are provided to communicate with each other.

The atsupa body 32 includes the above-mentioned step 32a, a liquid inlet 32b to which the cap 22 equipped with ventilation means is attached (the inner opening is formed with a step and a notch for assembling the filter 34), and an eleventh
In the figure and FIG. 13, an inlet 32c that is closed by a cap 23 (the hydraulic fluid in the reservoir R is also supplied to other hydraulically operated devices, such as a hydraulically operated device of a traction control device). (for returning the hydraulic fluid from the hydraulically operated device into the reservoir R in the case where the hydraulically operated device is configured as shown in FIG. The inner opening of the inflow port 32c has a function of guiding the hydraulic fluid flowing from the inflow port 32c downward, and a function of guiding the hydraulic fluid flowing from the inflow port 32c downward. A semicircular cylindrical portion 32e and a weir 32f are provided which have the function of preventing the hydraulic fluid previously injected into the inside from leaking out even if it is sucked by the negative pressure generated by removing the cap 23. Further, a through hole 32g extending in the vertical direction is provided in the upper part of the vertical wall 32d.
The vertical wall indicated by the reference numeral 32h in the figure is for preventing the working fluid returning from the inlet 31d provided in the lower body 31 from flowing forcefully into the second chamber 42. A slit 32i is provided that extends into the wall.

The filter 33 includes a loop-shaped portion 33a sandwiched between the lower body 31 and the upper body 32, and also includes a mesh body 33b that forms the second chamber 42 into an upper chamber 42a and a lower chamber 42b. A vent cylinder 33c that extends upward for a predetermined length is integrally formed in a continuous portion.

In the reservoir R equipped with the main body 30 having the above configuration, the regulator valve V2,
Each cut valve - the hydraulic fluid returned from the hydraulically operated devices such as piston portions C1, C2, C3, etc. enters the inlet 31.
The hydraulic fluid returned from the hydraulically actuated equipment of the traction control device through the inlet 32c enters the upper chamber 42a through the mesh 33b of the filter 33 and flows into the lower chamber 42b. . Further, the hydraulic fluid in the lower chamber 42b is transferred to the vertical wall 31.
It flows into the first chamber 41 through the through holes 31h and 31i provided at the lower part of the pump P, and is supplied to the pump P from the outlet 31a provided at the lower part of the first chamber 41. Therefore, the working fluid supplied to the pump P is effectively purified. Moreover, atmospheric pressure is applied to the hydraulic fluid in the first chamber 41 by the ventilation means of the cap 22 attached to the fluid inlet 32b provided at the upper part of the hydraulic fluid, and the vertical pressure is applied to the hydraulic fluid in the second chamber 42. wall 32d
Atmospheric pressure is applied through a through hole 32g provided in the upper part of the filter 33, and in particular, atmospheric pressure is applied to the working fluid below the filter 33 through a vent cylinder 33c provided in the filter 33. Therefore, all the hydraulic fluid in the reservoir R flows smoothly, and the suction efficiency of the pump P does not deteriorate.

Furthermore, if the filter 33 is clogged or the amount of reflux liquid to the reservoir R is temporarily increased, the upper chamber 4
Even if the hydraulic fluid in 2a increases gradually,
When the liquid level reaches a predetermined value, the hydraulic fluid flows directly from the upper chamber 42a to the lower chamber 42b through the vent hole 33c provided in the filter 33, and the hydraulic fluid in the upper chamber 42a flows through the vent hole 32g provided in the upper part of the vertical wall 32d. The liquid flows through the liquid into the first chamber 41 to prevent the liquid level from rising abnormally. Therefore, an appropriate amount of hydraulic fluid is supplied to the hydraulically operated equipment, and leakage of the fluid from the ventilation means of the cap 22 attached to the fluid inlet 32b can be prevented.

In addition, pressure switch S, regulator valve V
2. Solenoid valves V3a, V3b, V3c,
The detailed structure of the cut valve-piston parts C1, C2, C3 and the bypass bypass V4a, V4b, V4c is substantially the same as that proposed in, for example, Japanese Patent Application Laid-Open No. 61-46749, and the gist of the present invention is Since there is no direct relation to this, the explanation will be omitted.

[Brief explanation of drawings]

Fig. 1 is a top view showing an example of the reservoir according to the present invention, Fig. 2 is a bottom view of the same, and Fig. 3 is the same as Fig. 1.
4 is a sectional view taken along the - line in Fig. 1, Fig. 5 is a sectional view taken along the - line in Fig. 1, and Fig. 6 is a sectional view taken along the - line in Fig. 1. A top view of the lower body, FIG. 7 is a bottom view of the upper body shown in FIGS. 1 to 5, FIG. 8 is a top view of the filter shown in FIGS. 3 and 4, and FIG. 9 is a side view of the same. ,
FIG. 10 is a diagram schematically showing the actuator of the anti-skid device for an automobile, FIG. 11 is a detailed front view of the actuator shown in FIG. 10, and FIG.
The figure is a side view of the same, and FIG. 13 is a rear view of the same. Explanation of symbols, 22... Cap, 30... Reservoir body, 31... Lower body, 32... Atsupa body, 31a... Outlet, 31b, 32c...
Inlet, 31e, 32d...Vertical wall (vertical bulkhead), 3
1h, 31i...through hole, 32b...liquid inlet, 32
g...Vent hole, 33...Filter, 33c...Vent pipe, 41...First chamber, 42...Second chamber, 42a...
...Upper chamber, 42b...Lower chamber, P...Pump, R...
Reservoir, V2, C1, C2, C3...Regulator valve, cut valve-piston part (hydraulic operating equipment).

Claims (1)

[Scope of utility model registration request] The interior is divided into a first chamber and a second chamber by a vertical bulkhead, and the first chamber has an inlet at the top to which a cap with ventilation means is attached, and an outlet connected to a pump at the bottom. A filter is provided in the middle of the second chamber, and above the filter is connected to an inlet connected to a hydraulically operated device operated by the hydraulic fluid discharged from the pump. At the same time, an upper chamber is formed which communicates with the upper part of the first chamber through a through hole provided in the upper part of the vertical partition wall, and an upper chamber is formed below the filter through a through hole provided in the lower part of the vertical partition wall. A lower chamber is formed which communicates with the lower part of the chamber, and the filter is further provided with a ventilation cylinder that extends upward from the filter by a predetermined length and allows the upper and lower chambers to directly communicate with each other.