JPH061074U - Modulator unit and reservoir assembly - Google Patents

Abstract

(57) [Summary] [Objective] In an assembly in which a reservoir is coupled to the upper surface of a modulator unit having a plurality of solenoid valves, the outlets of all solenoid valves can be formed by forming a smaller number of connecting bosses in the reservoir than the solenoid valves The structure of the reservoir can be simplified by making it possible to communicate with the inside of the reservoir. [Structure] Multiple solenoid valves 2 _{1 in} modulator unit ₁
~ 2 ₄ outlet chambers 31 _{1 to} 31 ₄ and 2 chambers 2
Set of outlet chamber 31 _1, 31 _2; each communicating with a 31 _3, 31 _4, connecting half of the solenoid valves 21 _{to 24} holes 13 _1, 1
3 ₂ is provided, and the connection bosses 12 ₁ and 12 ₂ of the reservoir 3 are oil-tightly fitted into these connection holes 13 ₁ and 13 _{2 so} as to communicate the inside thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an assembly of a modulator unit and a reservoir used in an automobile anti-lock brake device, and more particularly, to a reservoir which communicates with an outlet of each solenoid valve on an upper surface of a modulator unit having a plurality of solenoid valves arranged in parallel. Related to "improvement".

[0002]

[Prior art]

 Such an assembly is already known, for example, as disclosed in Japanese Utility Model Laid-Open No. 3-11974.

[0003]

[Problems to be solved by the device]

 In the conventional modulator unit / reservoir assembly, the reservoir is provided with the connection boss for individually communicating the outlets of the respective solenoid valves, and therefore the same number of connection bosses as the solenoid valves are required. The structure is complicated and the cost is high.

The present invention has been made in view of such circumstances, and the modulator unit and the reservoir which can communicate the outlet of each solenoid valve with the reservoir only by providing the reservoir with connection bosses less than the number of solenoid valves. An object of the present invention is to provide an assembly.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a modulator unit with a smaller number of outlet chambers that respectively communicate with the outlets of a plurality of solenoid valves and a plurality of solenoid valves that communicate with the plurality of outlet chambers and open on the upper surface of the modulator unit. A connection hole is provided, and a connection boss projecting from the lower surface of the reservoir is oil-tightly fitted to this connection hole, and an inflow hole communicating the connection hole with the reservoir is provided in the connection boss. Characterize.

Further, in addition to the above features, the present invention provides the connection boss with an inflow groove that communicates between the plurality of outlet chambers and the inflow holes, and an outflow groove that communicates with a delivery passage that communicates with the suction port of the hydraulic pump. A second feature is that a partition wall that blocks between the inflow and outflow grooves and an outflow hole that communicates the inside of the reservoir with the outflow groove are provided.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

First, in FIG. 1, a modulator unit 1 of an antilock brake device for an automobile has _four built-in parallel solenoid valves 2 ₁ to 2 ₄ . These solenoid valves ₂₁ to ₂₄ is carried out during braking, the corresponding left front wheel brake, the right front wheel brake, a rear left wheel brake, hydraulic supply to the right rear wheel brake, holding, discharge, locking of the wheels It avoids the situation.

[0009] The upper part of the modulator 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. A delivery passage 5 for guiding the hydraulic oil in the reservoir 3 to the suction inlet of the hydraulic pump 6 is provided on one side of the modulator unit 1.

[0010] As shown in FIGS. 1 and 2, the reservoir 3 comprises a rectangular reservoir 7 in a plan view, the electromagnetic valve 2 ₁ - is formed a bottom wall one side of the reservoir Ri 7 is lowered one step 2 ₄ extending in the direction of arrangement, one end of this flow path 8 projects from one side surface of the reservoir 7 to form a projecting end 8a. The reservoir 3 is configured by welding an upper reservoir half 3a and a lower reservoir half 3b, which are individually formed of synthetic resin, to each other by welding.

A refueling port 9 is provided on the upper wall of the upper reservoir half 3 a, and a cylindrical filter 10 for filtering the injected working oil is attached to the refueling port 9, and usually a cap 11 is provided. Has been applied.

The lower reservoir half 3b is integrally formed with a pair of connecting bosses 12 ₁ and 12 ₂ projecting downward from the bottom wall of the flow path portion 8, and one connecting boss 12 ₁ is connected to the oil supply port. The connection boss 12 _{2 on the} other side is disposed immediately below the connection boss 9 and is disposed on the protruding end 8 a of the flow path 8. These connection bosses 12 ₁ and 12 ₂ are oil-tightly fitted into a pair of bottomed connection holes 13 ₁ and 13 ₂ on the upper surface of the modulator unit 1 via seal members 14 and 14.

[0013] Each connection boss 13 _1, 13 reinforcing brackets 15 ₁ bottomed cylindrical can _2, 15 ₂ are embedded, the connection metal fitting 15 ₁ immediately below the filler opening 9 by screws 16 _first hole 13 ₁ Fixed to the bottom wall of the. At that time, the screw 16 is operated by a tool inserted into the fuel filler port 9. A mounting piece 17 is integrally formed on the protruding end portion 8a of the flow path portion 8 and is fixed to the modulator unit 1 with a screw 16 ₂ . In this way, the reservoir 3 is attached to the modulator unit 1.

The flow path portion 8 is divided into a narrow primary flow path 19 and a wide secondary flow path 20 by a partition wall 18 standing upright from the bottom wall thereof. The partition wall 18 starts from the inner end wall on the protruding end portion 8a side of the flow path portion 8 and ends in the vicinity of the inner end wall on the opposite side. At the end of this partition wall 18, both flow paths 19 and 20 communicate with each other.

The upper surface of the primary channel 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. In order to maintain this fitting state, as shown in FIGS. 1 to 3, the three columns 24 _{1 to} 24 ₃ integrally formed on the cover plate 21 and the upper reservoir half 3a are integrally formed. The three columns 25 _{1 to} 25 ₃ are welded together. The welding is performed simultaneously with the welding of both reservoir halves 3a, 3b.

In FIGS. 1 and 4, annular grooves 26 and 27 are formed on the lower surfaces of the connection bosses 12 ₁ and 12 ₂ , respectively, and the latter connection boss 12 ₂ has an arc-shaped inflow in the annular groove 27. A pair of partition walls 28, 28 that partition the groove 27a and the inferior arc-shaped outflow groove 27b are formed. Further, inflow holes 29 ₁ and 29 ₂ are provided in the connection bosses 12 ₁ and 12 ₂ respectively so that the annular groove 26 and the inflow groove 27a communicate with the primary flow path 19, and the secondary flow path 20 is provided in the outflow groove 27b. An outflow hole 30 is provided in the connection boss 12 _{2 so as} to communicate with each other.

Referring again to FIG. 1, the solenoid valve 2 is provided in the modulator unit 1.₁~ 2_FourExit room 31 connected to the exit of₁~ 31_FourAnd a pair of outlet chambers 31 adjacent to each other on one side ₁ , 31₂Is connected to the annular groove 26 so that the connection hole 13₁Part of each is opened on the bottom of the. A pair of outlet chambers 31 adjacent to each other on the other side₃, 31_FourIs connected to the connection hole 13 so as to communicate with the inflow groove 27a.₂Part of each is opened on the bottom of the.

Further, 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.₂It is opened on the bottom of the. Thus, the connection hole 13₂At the connection boss 12 so as to prevent the inflow groove 27a and the outflow groove 27b from communicating with each other. ₂ The partition walls 28, 28 of the connection hole 13₂Adheres to the bottom of the.

Next, the operation of this embodiment will be described.

The hydraulic oil discharged from the pair of solenoid valves 2 ₁ and 2 ₂ on one side to the outlet chambers 31 ₁ and 31 ₂ passes through the annular groove 26 and the inflow hole 29 ₁ of the _one connection boss 12 ₁ and the primary flow path. The hydraulic oil that has flowed into the other side of the pair of solenoid valves 2 ₃ and 2 ₄ to the outlet chambers 31 ₃ and 31 ₄ flows into the inlet groove 27a of the other connecting boss 12 ₂ and the inlet hole 29. _{It also} flows into the primary flow path 19 via ₂ . Then, as shown by the arrow in FIG. 2, the hydraulic oil flows through the primary flow path 19 toward its outlet, that is, the end of the partition wall 18, then moves around the above-mentioned end to the secondary flow path 20, and moves it. It flows down from the outflow hole 30 of the connection boss 12 ₂ farthest from the end to the outflow groove 27b, outflows into the delivery passage 5, is sucked and pressurized by the hydraulic pump 6, and is used as pressure oil for controlling each wheel brake. To be done.

By the way, since the hydraulic oil discharged from the solenoid valves 2 ₁ to 2 ₄ has a relatively high pressure, the hydraulic oil is vigorously stirred in the outlet chambers 31 _{1 to} 31 ₄ and a large amount of bubbles are generated. Therefore, although the hydraulic oil flowing into the primary flow passage 19 contains a large amount of bubbles, while the hydraulic oil passes through the long flow passage including the primary and secondary flow passages 19 and 20 as described above, The air bubbles are separated from the hydraulic oil, and the separated air bubbles float above the oil surface of the reservoir 7 and are discharged to the outside from an air vent (not shown) of the cap 11.

At that 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 are discharged to the outlet of the primary flow path 19 farthest from the outflow hole 30. When it reaches, it will be released from the cover plate 21, so that the bubbles flowing in the primary flow path 19 will enter the secondary flow path 20 side even though both flow paths 19 and 20 are adjacent to each other. Can be prevented.

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

In addition, the modulator unit 1 includes a solenoid valve 2₁~ 2_FourThe same number of exit chambers 31 connected to the exits of each₁~ 31_FourAnd two exit chambers 31₁, 31₂31₃, 31_FourSolenoid valve 2 communicating with each₁~ 2_FourHalf of the connection holes 13₁, 13₂And the connection holes 13 are provided.₁, 13₂To the connection boss 12 of the reservoir 3 ₁ , 12₂Are fitted through the seal members 14 and 14, and each connection hole 13₁, 13₂ At each exit room 31₁, 31₂31₃, 31_FourIs the connection boss 12₁, 12 ₂ Inflow hole 29₁, 29₂Is connected to the solenoid valve 2 in the reservoir 3.₁~ 2_FourHalf of the connection boss 12₁, 12₂All solenoid valve 2 just by forming₁~ 2_FourThe outlet of the reservoir 3 can be communicated with the inside of the reservoir 3, thus simplifying the structure of the reservoir 3 and connecting the boss 12₁, 12₂The surrounding seal members 14, 14 can be reduced.

Moreover, since the inflow hole 29 ₂ and the outflow hole 30 are provided in the same connection boss 12 ₂ , it can greatly contribute to downsizing of the reservoir 3.

Further, since the annular groove 27 of the connecting boss 12 ₂ is divided into the inflow groove 27 a and the outflow groove 27 _b by the partition wall 28, the operating oil containing bubbles and the operating oil obtained by separating bubbles in the same connecting boss 12 ₂ are separated. It can be delivered to and from and mixed with both hydraulic oils can be prevented.

[0027]

[Effect of device]

 As described above, according to the first feature of the present invention, the modulator unit has outlet chambers that communicate with the outlets of the plurality of solenoid valves, and a solenoid valve that communicates with the plurality of outlet chambers and opens on the upper surface of the modulator unit. A smaller number of connection holes are provided, and a connection boss protruding from the lower surface of the reservoir is oil-tightly fitted into this connection hole, and this connection boss has an inflow hole that connects the connection hole to the inside of the reservoir. Since it is provided, the outlets of all solenoid valves can be communicated with the reservoir by providing a smaller number of connection bosses than the solenoid valve in the reservoir, thus simplifying the structure of the reservoir and sealing members around the connection boss. Combined with the small number, it can greatly contribute to the improvement of the assemblability and the cost reduction.

According to a second feature of the present invention, in addition to the above features, the connection boss has an inflow groove communicating between the plurality of outlet chambers and the inflow holes and a delivery passage communicating with the suction port of the hydraulic pump. Since the outflow groove that communicates with the inflow and outflow grooves and the partition wall that blocks the inflow and outflow grooves and the outflow hole that connects the inside of the reservoir to the outflow groove are provided, the solenoid valve can be connected to the reservoir and the hydraulic pressure can be supplied from the reservoir to the same connection boss. The hydraulic oil can be delivered to the pump, which can contribute to simplification of the structure of the reservoir and downsizing.

[Brief description of drawings]

FIG. 1 is a vertical 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 of FIG.

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

[Explanation of symbols]

1 modulator unit 21 _{to 24} solenoid valve 3 reservoir 5 delivery passage 6 hydraulic pump 12 _1, 12 ₂ connected bosses 13 _1, 13 ₂ connection hole 14 sealing members 26 and 27 an annular groove 27a flows into groove 27b flows out groove 28 partition wall 29 ₁ , 29 ₂ Inflow hole 30 Outflow hole 31 _{1 to} 31 ₄ Outlet chamber

Claims (2)

[Scope of utility model registration request] 1. A plurality of solenoid valves arranged in parallel (2₁~ 2_Four)
On the top surface of the modulator unit (1) having
Valve (2₁~ 2_Four) Connect the reservoir (3) communicating with the outlet of
Combined modulator unit and reservoir assembly
In the modulator unit (1), a plurality of solenoid valves (2₁~
Two_Four) Outlet chambers (31₁~ 31
_Four) And multiple outlet chambers (31₁, 31₂31 ₃, 31
_Four) And an opening on the upper surface of the modulator unit (1)
Solenoid valve (2 ₁~ 2_Four) Fewer connection holes (13₁，
Thirteen₂) And the connection hole (13₁, 13₂)
Connection boss (12) protruding from the lower surface of the server (3)₁, 12
₂) Is oil-tightly fitted, and the connection boss (12₁, 12₂)
Connection hole (13₁, 13₂) In the reservoir (3)
Through hole (29₁, 29₂) Is provided
A modulator unit and reservoir assembly. 2. The connection boss (12) according to claim 1, wherein₂) Has multiple outlet chambers (31₃, 31
_Four) And inflow hole (29 ₂) Inflow groove (27)
a) and a delivery passage communicating with the suction port of the hydraulic pump (6)
The outflow groove (27b) communicating with (5) and the inflow and outflow of these
Partition wall (28) for blocking between the grooves (27a, 27b)
And a flow communicating with the outflow groove (27b) in the reservoir (3).
Modular, characterized in that it is provided with an exit hole (30)
Unit and reservoir assembly.