JP2565276Y2 - Reservoir for hydraulic equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reservoir for hydraulic equipment such as an anti-lock braking device for a motor vehicle, and more particularly to a reservoir mounted on a control unit having a solenoid valve. The present invention relates to an improvement having an outflow hole connected to a delivery passage.

[0002]

2. Description of the Related Art Such a reservoir is disclosed, for example, in Japanese Utility Model Laid-Open No. 3-1.
It is already known as disclosed in 1974.

[0003]

By the way, in the conventional reservoir, bubbles in the hydraulic oil flowing into the reservoir through the inflow hole from the solenoid valve of the control unit are separated, and only the hydraulic oil is discharged from the control unit through the outflow hole. The inflow hole and the outflow hole are arranged as far apart as possible in order to send out to the delivery passage.

[0004] However, in such a device, it is difficult to make the reservoir large, and it is difficult to make a large space between the inflow hole and the outflow hole, so that the separation of air bubbles from the hydraulic oil is hindered.

The present invention has been made in view of the above circumstances, and has as its object to form a long flow path between the inflow hole and the outflow hole to promote the separation of bubbles, thereby reducing the size of the reservoir. .

[0006]

In order to achieve the above object, according to the present invention, a connection boss is provided on a bottom wall of a reservoir so as to fit in a connection hole of a control unit in an oil-tight manner. An inflow hole that communicates the outlet of the solenoid valve with the inside of the reservoir,
An outlet hole communicating the inside of the reservoir with the delivery passage, a primary flow path separating the inflow hole and the outflow hole and continuing to the inflow hole, and a secondary flow path from the outlet of the primary flow path to the outflow hole The first feature is that the partition wall forming the is installed inside the reservoir.

According to the present invention, in addition to the above features, an annular groove is provided on the bottom surface of the connection boss, and a partition wall for dividing the annular groove into an inflow groove and an outflow groove is provided. The second feature is that the outlet is connected to the inflow hole, and the outflow hole is connected to the delivery passage through the outflow groove.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 1, a control unit 1 of an antilock brake device for a vehicle includes four solenoid valves 2 in parallel.
Has a built-in ₂₁ to _24. These solenoid valves ₂₁ to ₂₄ are
During braking, hydraulic pressure is supplied, held, and discharged to the corresponding left front wheel brake, right front wheel brake, left rear wheel brake, and right rear wheel brake, thereby avoiding the locked state of each wheel.

[0010] The upper portion of the control unit 1 is attached is a reservoir 3 for storing hydraulic oil, hydraulic oil flows back to the reservoir 3 is discharged from the solenoid valves ₂₁ to _24. Further, on one side of the control unit 1, there is provided a delivery passage 5 for guiding the hydraulic oil in the reservoir 3 to the suction port of the hydraulic pump 6.

[0011] As shown in FIGS. 1 and 2, the reservoir 3 comprises a rectangular reservoir 7 in a plan view, the electromagnetic valve 2 ₁ to 2 the bottom wall one side of the sump 7 is formed by lowering one step _{And a} flow path portion 8 extending in the arrangement direction. One end of the flow path portion 8 protrudes from one side surface of the pool portion 7 to form a protruding end portion 8a. The reservoir 3 is formed by joining an upper reservoir half 3a and a lower reservoir half 3b, which are individually formed of synthetic resins, by welding.

A fuel inlet 9 is provided on the upper wall of the upper reservoir half 3a.
The oil supply port 9 is provided with a cylindrical filter 10 for filtering the hydraulic oil to be injected, and is usually provided with a cap 11.

The lower reservoir half 3b has a flow path 8
A pair of connection bosses 12 ₁ , 12 ₂ protruding downward from the bottom wall
There are formed integrally, one connection boss 12 ₁ is located directly below the filler opening 9, the other connection boss 12 ₂ is disposed in the projecting end 8a of the flow path portion 8. These connection bosses 1
2 _1, 12 ₂ is fitted oil-tightly via a pair of bottom of the control unit 1 top surface connection holes 13 _1, 13 ₂ to the sealing member 14, 14.

The connection bosses 13 ₁ and 13 ₂ have bottomed cylindrical reinforcing members 15 ₁ and 15 ₂ embedded therein.
Reinforcing brackets 15 ₁ immediately below the screw 16 ₁ connection hole 13 ₁
Is fixed to the bottom wall. At this time, the screw 16 is operated by a tool inserted into the fuel filler 9. Also the projecting end 8a of the flow path portion 8 is mounted piece 17 is integrally molded, which is fixed to the control unit 1 by means of screws 16 _2. Thus, the reservoir 3 is attached to the control unit 1.

The flow channel 8 is formed of a partition wall 1 rising from a bottom wall thereof.
The partition 8 defines a narrow primary channel 19 and a wide secondary channel 20. The partition wall 18 starts from the inner end wall on the protruding end 8a side of the flow path portion 8 and ends near the opposite inner end wall. At the end of the partition wall 18, the two flow paths 19 and 20 communicate with each other.

The upper surface of the primary flow path 19 is closed by a cover plate 21. Both ends of the cover plate 21 are fitted to step portions 22 and 23 (see FIG. 3) formed on both side walls of the flow path portion 8, respectively. In order to maintain this fitted state, FIGS.
3, three pillars 2 integrally formed on the cover plate 21.
4 and _{1-24 3,} the strut 25 _to 253 three integrally formed on the upper reservoir halves 3a is welded. The welding is performed simultaneously with the welding of the two reservoir halves 3a and 3b.

1 and 4, the connection bosses 12 ₁ ,
The lower surface of the 12 ₂ are formed annular grooves 26 and 27 respectively, and the latter connecting bosses 12 to ₂ pair of partitioning the inside thereof an annular groove 27 in the outflow groove 27b of inflow grooves 27a and inferior arcuate Yu arc Partition walls 28, 28 are formed. The annular groove 26, flows inflow hole 29 ₁ to the groove 27a through consecutive two said 1 Tsugiryuro 19, 29 ₂ are respectively provided on the connecting bosses 12 _1, 12 _2, also the secondary flow path 20 to the outlet groove 27b the outlet hole 30 to pass communication is provided in the connection boss 12 _2.

Referring again to FIG. 1, the control unit 1 includes:
Outlet chamber 31 _1-3 leading to an outlet of the solenoid valve 21 _{to 24}
1 ₄ is provided, a pair of outlet chamber 31 ₁ adjacent on one side,
31 ₂ are respectively allowed to partially open in the bottom surface of the connection hole 13 ₁ so as to communicate with the annular groove 26. The pair of outlet chamber 31 ₃ adjacent on the other side, 31 ₄ are respectively allowed to partially open in the bottom surface of the connection hole 13 ₂ so as to communicate with the inflow grooves 27a.

As shown in FIGS. 1 and 3, the delivery passage 5 is connected to the connection hole 13 so as to communicate with the outflow groove 27b.
It has an opening on the bottom of ₂ . And Thus, in the connection hole 13 ₂ so as to block the communication of the inlet grooves 27a and outflow grooves 27b cross the partition walls 28, 28 of the connection bosses 12 ₂ is in close contact with the bottom surface of the connection hole 13 _2.

Next, the operation of this embodiment will be described.

The one pair of solenoid valves 2 _1, 2 ₂ from the outlet chamber 3
1 _1, 31 hydraulic oil discharged respectively to ₂ through one of the annular groove 26 and the inlet hole 29 ₁ of the connection boss 12 ₁ flows into the 1 Tsugiryuro 19, also other side pair of solenoid valves 2 _3, 2 ₄
From the outlet chamber 31 _3, 31 hydraulic oil discharged respectively to ₄ of the other connecting boss 12 _second inflow grooves 27a and the inlet hole 29
Similarly, it flows into the primary flow path 19 through ₂ . And FIG.
As indicated by the arrows in FIG. 1, the hydraulic fluid flows through the primary flow path 19 towards its outlet, the end of the bulkhead 18, then around the said end and into the secondary flow path 20, down there from the said end. effluent from the farthest connecting the outflow hole 30 of the boss 12 ₂ grooves 27
After flowing through the delivery passage 5 through b, it is sucked and pressurized by the hydraulic pump 6, and is supplied to pressure oil for control of each wheel brake.

By the way, since the hydraulic oil discharged from the electromagnetic valve 21 _{to 24} is a relatively high pressure, the outlet chamber 31 _{1-31
In 4} the vigorous agitation of the hydraulic oil occurs, generating a large amount of air bubbles. Therefore, the hydraulic oil flowing into the primary flow path 19 contains a large amount of air bubbles, and while the hydraulic oil passes through the long flow path composed of the primary and secondary flow paths 19 and 20 as described above. The bubbles are separated from the hydraulic oil, and the separated bubbles float on the oil surface of the reservoir 7 and are discharged to the outside from an air vent (not shown) of the cap 11.

At this time, since the upper surface of the primary flow path 19 is closed by the cover plate 21, the bubbles separated in the primary flow path 19 flow to the outlet of the primary flow path 19 farthest from the outlet hole 30. When it arrives, it will be released from the cover plate 21, and therefore, although the two flow paths 19 and 20 are adjacent to each other,
Bubbles flowing in the primary flow path 19 can be prevented from entering the secondary flow path 20 side.

Thus, in the primary and secondary flow paths, the bubbles can be effectively separated from the hydraulic oil, and the hydraulic oil containing no bubbles can be sent to the delivery passage.

[0025] Moreover, the inflow hole 29 ₂ and the outflow hole 30 is so provided on the same connection boss 12 _2, may contribute greatly to compaction of the reservoir 3.

Furthermore, the annular groove 27 of the connection bosses 12 ₂ because it is divided into an inflow grooves 27a outflow groove 27b by the partition wall 28, and a hydraulic fluid to separate hydraulic fluid and gas bubbles including bubbles in the same connection boss 12 ₂ Can be delivered, and mixing of both hydraulic oils can be prevented.

[0027]

As described above, according to the first feature of the present invention, a connection boss is provided on the bottom wall of the reservoir so as to fit in a connection hole of the control unit in an oil-tight manner. An inflow hole that communicates the outlet of the solenoid valve with the inside of the reservoir, and an outflow hole that communicates the inside of the reservoir with the delivery passage. A primary flow path that partitions between the inflow hole and the outflow hole and communicates with the inflow hole. Since the partition wall forming the secondary flow path from the outlet of the next flow path to the outflow hole is installed inside the reservoir, the reservoir is made compact by forming the inflow hole and the outflow hole to the same connection boss. Primary and secondary connecting outlet holes
Bubbles can be effectively separated from hydraulic oil in the next flow path.

According to a second feature of the present invention, an annular groove is provided on the bottom surface of the connection boss, and a partition wall for dividing the annular groove into an inflow groove and an outflow groove is provided. Since the outlet of the valve was communicated with the inflow hole and the outflow hole was communicated with the delivery passage through the outflow groove, at the same connection boss,
Mixing of hydraulic oil containing air bubbles from the solenoid valve to the inflow hole and hydraulic oil separated from air bubbles from the outflow hole to the delivery passage can be easily and reliably prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal side view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 1;

FIG. 4 is a bottom view of the reservoir in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Control unit 2 ₃ , 2 ₄ Solenoid valve 3 Reservoir 5 Delivery passage 12 ₂ Connection boss 13 ₂ Connection hole 18 Partition wall 19 Primary flow path 20 Secondary flow path 27 Annular groove 29 ₂ Inflow hole 30 Outflow hole

Claims (2)

(57) [Scope of request for utility model registration] 1. A attached to a control unit having an electromagnetic valve (2 _3, 2 ₄₎ (1), the solenoid valves _(23, 2 ₄₎ inflow hole communicating with the outlet (29 ₂₎ and the control unit (1 ), The hydraulic equipment reservoir having an outflow hole (30) connected to the delivery passage (5).
3 ₂₎ the projected connection boss (12 ₂₎ to be fitted to the oil-tight,
The connection boss (12 _2), the outflow hole (30 communicating the outlet of the solenoid valve (2 _3, 2 ₄₎ an inlet hole communicating with the internal reservoir (29 _2), the reservoir internal delivery passage (5) )
And the inflow hole (29 ₂ ) and the outflow hole (30)
During continuous inflow bore (29 ₂₎ partition the 1 Tsugiryuro (1
9) and an outlet hole (3) from the outlet of the primary flow path (19).
A reservoir for hydraulic equipment, wherein a partition (18) forming a secondary flow path (20) leading to 0) is provided inside the reservoir. 2. The device according to claim 1, wherein an annular groove (27) is formed on a bottom surface of the connection boss (12 ₂ ), and the annular groove (27) is divided into an inflow groove (27a) and an outflow groove (27b). A partition wall (28) is provided for the inflow groove (27).
a) through the outlet of the solenoid valve (2 ₃ , 2 ₄ ) through the inlet (2).
9 _2), also characterized in that respectively communicate the delivery passage (5) the outflow hole (30) through the outflow groove (27b), a reservoir for hydraulic equipment.