JP3382429B2 - Vehicle brake fluid pressure control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to a first mounting of a base.
The control device mounted on the base from the first mounting surface side
A cover that covers the inside and communicates with the atmosphere
And provided on the base body in a direction different from the first mounting surface.
The second mounting surface is provided with a module for forming a cam chamber between itself and the base.
The plunger pump is attached to the plunger
End of the cam is projected into the cam chamber and is built into the base,
The cam provided on the output shaft of the motor indoors
Related to the vehicle brake fluid pressure control device abutting on the end of the
I do. [0002] 2. Description of the Related Art Conventionally, such an apparatus is disclosed in, for example,
It is already known from, for example, JP-A-156774. [0003] By the way, among motors,
To prevent dew condensation due to air temperature changes in the
In order to prevent a decrease in sealing performance due to a change in force,
It is necessary to communicate the inside of the motor and the cam chamber to the outside.
In recent years, communication holes that open directly to the outside have been installed in the base and motor.
Have been killed. However, in such a structure, the communication hole
Is open directly to the outside, making it easy for water to enter,
In addition, there is a problem that foreign matter is easily clogged in the communication hole. this
In order to solve such problems, it is difficult for water to enter the communication hole
Position, or install a labyrinth or the like at the opening of the communication hole.
Measures have been taken, but completely
The communication hole can be prevented from clogging by intrusion or foreign matter.
Rust inside the plunger pump, cam and motor.
Outbreak was inevitable. [0004] The present invention has been made in view of such circumstances.
To prevent water intrusion and clogging by foreign matter.
Vehicle brakes that allow the cam chamber to communicate with the outside
It is an object to provide a hydraulic control device. [0005] [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The invention according to claim 1 is characterized in that the first mounting surface of the base has
1 Covering the control device mounted on the base from the mounting surface side
First, a cover that allows the inside to communicate with the atmosphere is attached.
A second surface provided on the base body facing in a direction different from the mounting surface.
A motor that forms a cam chamber between the mounting surface and the base is mounted on the mounting surface.
And the plunger pump closes the end of the plunger.
It is built into the base so as to protrude into the cam chamber, and
The cam provided on the output shaft of the
In the vehicle brake fluid pressure control device that comes into contact with
DataThe output shaft is rotatably supported by the motor housing
Of the motor through the bearingInside the cam roomDirectlyCommunicating
Let throughSo that the motorMounted on the second mounting surface
One end is communicated with the inside of the cover, and the other end is connected to the cam chamber.
A communication hole opened in the base is provided in the base., Its substrate is small
At least the body with the first mounting surface in the vertical direction
And a first mounting surface of the base and a lower portion of the cover.
A passage connecting the inside of the cover to the atmosphere is provided at a lower end thereof.
Formed so as to open to the atmosphereIt is characterized by
I do. [0006] [0007] Embodiments of the present invention will be described below.
A description will be given based on one embodiment of the present invention shown in the accompanying drawings. FIGS. 1 to 4 show an embodiment of the present invention.
FIG. 1 is a hydraulic circuit diagram of a vehicle brake device,
FIG. 2 is a partially cutaway side view of the brake fluid pressure control device, and FIG.
2 is a sectional view taken along the line 3-3 in FIG. 2, and FIG. 4 is along the line 4-4 in FIG.
It is the front view of the base | substrate seen from the direction. First, in FIG. 1, a tandem type master serial
M is a braking fluid pressure corresponding to the depression of the brake pedal P.
A pair of output ports 13 for outputting₁, 13_TwoWith
Left front wheel brake B_FL, Right rear wheel brake
B_RRProportional pressure reducing valve 14 connected to_R, Right front wheel
B_FR, And left rear wheel brake B_RLConnected to
Proportional pressure reducing valve 14_LAnd the two output ports 13₁, 1
3_TwoHydraulic path 12 connected to₁, 12_TwoBlur between
A brake fluid pressure control device 15 is provided. [0010] The brake fluid pressure control device 15 includes a left front wheel.
Wheel brake B_FL, Right rear wheel brake B_RR, Right front
Wheel brake B_FRAnd left rear wheel brake B_RL
Normally open solenoid valves V individually corresponding to_OFL, V_ORR,
V_OFR, V_ORLAnd each normally open solenoid valve V_OFL~ V_ORLNiso
Four check valves 17 connected in parallel_FL, 17
_RR, 17_FR, 17_RLAnd each wheel brake B_FL~ B_RL
Normally closed solenoid valves V individually corresponding to_CFL, V_CRR,
V_CFR, V_CRLAnd the left front wheel brake B_FLAnd right
Rear wheel brake B_RRWheel break for side and right front wheels
Key B_FRAnd left rear wheel brake B_RLEach piece on the side
Another pair of reservoirs 19₁, 19_TwoAnd both liza
Server 19₁, 19_TwoSuction valve 20₁, 20_TwoContact through
A pair of reciprocating plunger pumps 21 connected₁, 21
_TwoAnd both plunger pumps 21₁, 21_TwoSingle in common
Motor 22 and both plunger pumps 21₁, 21_TwoTo
Discharge valve 23₁, 23_TwoPair of dampers connected via
24₁, 24_TwoAnd an output port of the master cylinder M
Thirteen₁, 13_TwoHydraulic path 12 connected to₁, 12 _TwoYou
And both dampers 24₁, 24_TwoInterposed between each other
Orifice 25₁, 25_TwoAnd each normally open solenoid valve
V_OFL~ V_ORLAnd each normally closed solenoid valve V_CFL~ V_CRLof
The demagnetization / excitation is switched by the electronic control unit 26.
It is. Normally open solenoid valve V_OFLIs the master cylinder M
One output port 13 of₁Hydraulic passage 12 connected to₁And left front
Wheel brake B_FLNormally open solenoid valve
V_{OR R}Is the hydraulic passage 12₁And right rear wheel brake B
_RRProportional pressure reducing valve 14 connected to_RInterposed between
Open solenoid valve V_OFRIs the other output port of the master cylinder M.
Port 13_TwoHydraulic passage 12 connected to_TwoAnd right front wheel breaker
Key B_FRAnd a normally open solenoid valve V_ORLIs
Hydraulic path 12_TwoAnd left rear wheel brake B_RLConnected to
Proportional pressure reducing valve 14_LIt is interposed between. Also check valve
17_FL~ 17_RLIs the corresponding wheel brake B_FL~ B_RLOr
Each normally-open type
Magnetic valve V_OFL~ V_ORLAre connected in parallel. Normally closed solenoid valve V_CFLIs the left front wheel brake
Key B_FLAnd reservoir 19₁Between, normally closed solenoid valve V_CRR
Is the proportional pressure reducing valve 14_RAnd reservoir 19₁Between, normally closed type
Solenoid valve V_CFRIs the right front wheel brake B_FRAnd reservoir
BA19_TwoIn between, normally closed solenoid valve V_CRLIs a proportional pressure reducing valve 1
4_LAnd reservoir 19_TwoEach is interposed between them. According to the brake fluid pressure control device 15,
Normal brakes without the possibility of locking each wheel
At normal times, each normally open solenoid valve V_OFL~ V_ORLIs demagnetized
And normally open, and each normally closed solenoid valve V_CFL~ V
_CRLIs in the demagnetized state and is closed. Therefore trout
One output port 13 of the cylinder M₁Output from
The brake fluid pressure is normally open solenoid valve V_OFLThrough the front left wheel
Brake B_FLNormally open solenoid valve V_ORRYou
And proportional pressure reducing valve 14_RVia the rear right wheel brake B
_RRAnd the other output port of the master cylinder M
Thirteen_TwoThe braking fluid pressure output from the_OFR
Via the right front wheel brake B_FRActs on
Normally open solenoid valve V_ORLAnd proportional pressure reducing valve 14_LLeft through
Rear wheel brake B_RLAct on. The wheels are likely to enter a locked state during braking
When the anti-lock control is activated, the normally open solenoid valve
V_OFL~ V_ORLWheels that are about to enter a locked state
The normally open solenoid valve corresponding to
Normally closed solenoid valve V_CFL~ V_CRLCorresponding to the above wheels
Energizes and opens the normally closed solenoid valve. Then, the brake fluid
Part of the pressure is in reservoir 19₁Or 19_TwoEscaped to
The pressure will be reduced. Also, when maintaining brake fluid pressure
Is a normally open solenoid valve V_OFL~ V_ORLWhen the valve is closed by exciting
Both are normally closed solenoid valves V_CFL~ V_CRLDemagnetized and valve closed
To increase the brake fluid pressure.
Solenoid valve V_OFL~ V_ORLDegauss and open and normally close
Type solenoid valve V_CFL~ V_CRLTo keep the valve closed.
I just need. A pair of plunger pumps 21₁, 21_TwoTo
The motor 22 that is commonly driven is used during the antilock control.
The reservoir 19₁, 19
_TwoHydraulic fluid released to the plunger pump 21₁, 21
_TwoFrom damper 24₁, 24_TwoAnd orifice 25₁,
25_TwoThrough each normally open solenoid valve V_OFL~ V_ORLUpstream of
That is, hydraulic passage 12₁, 12_TwoIs returned to. Therefore
Observer 19₁, 19_TwoAs much as the master cylinder
The amount of depression of the brake pedal P in M increases.
And the plunger pump 21₁, 21_TwoSent from
The pulsation of the discharged hydraulic fluid is₁, 24_TwoAnd e
Rifice 25₁, 25_TwoAttenuated by the action of
The pulsation of the rake pedal P is attenuated. Each normally open solenoid valve V_OFL~ V_ORLAnd each time
Closed solenoid valve V_CFL~ V_CRLTo control demagnetization / excitation of magnets
The control unit 26 has
The wheel speed of each wheel to determine
Separately detected wheel speed sensor 27_FL, 27_RR, 27_FR,
27_RLInput signal and the hand brake
Handbuffer that detects whether the killer 28 has been operated
The detection signal of the rake detection sensor 29 is input, and
When the electronic control unit 26 is in the
The alarm 30 such as a lamp activated by the electronic control
Connected to unit 26. Referring to FIG. 2 and FIG.
Four normally open solenoid valves V constituting the hydraulic control device 15
_OFL, V_ORR, V_OFR, V_ORLAnd four check valves 1
7_FL, 17_RR, 17_FR, 17_RLAnd four normally closed solenoid valves
V_CFL, V_CRR, V_CFR, V_{CR L}And a pair of reservoirs 1
9₁, 19_TwoAnd a pair of suction valves 20₁, 20_TwoAnd a pair
Plunger pump 21₁, 21_TwoAnd the motor 22,
A pair of discharge valves 23₁, 23_TwoAnd a pair of dampers 24₁,
24_TwoAnd a pair of orifices 25₁, 25_TwoWhat is
It is disposed on a metal base 34 formed in a rack shape. The substrates 34 are on different sides, for example, opposite sides.
First and second mounting surfaces 34a, 34b facing the sides
And a bracket 32 attached to the vehicle body 31
And the mounting surfaces 34a and 34b are vertically aligned.
Through a plurality of mounting means 33.
Supported. In FIG. 4, the first mounting surface 3 of the base 34 is shown.
4a has four fitting recesses 35._FL, 35_RR, 35_RL, 3
5_FRAnd four fitting recesses 36_FL, 36_RR, 36_RL, 36
_FRAre provided in parallel with each other. In addition, fitting recess 3
5_FL, 36_FL37 for reservoir at a position corresponding to
₁And fitting recess 35_RR, 36_RRDamper at a position corresponding to
Recess 38₁And fitting recess 35_RL, 36_RLRank corresponding to
Reservoir recess 37_TwoAnd fitting recess 35_FR, 36_FR
Recess 38 at a position corresponding to_TwoAnd each fitting recess
35_FL~ 35_FR, 36_FL~ 36_FRParallel to the array direction
They are arranged and provided on the first mounting surface 34a. Further mating
Recess 35_FL, 35_RR, 36_FL, 36_RROf the position surrounded by
Recess 39 and fitting recess 35_RR, 35_RL, 36_RR, 36_RL
The recess 40 at the position surrounded by_RL, 3
5_FR, 36_RL, 36_FRThe recess 41 at the position surrounded by
Joint recess 36_RR, 36_RLAnd recess 38 for damper₁, 38
_TwoThe concave portion 42 at the position surrounded by
It is provided on the mounting surface 34a. The base 34 normally has four control devices.
Open solenoid valve V_OFL, V_ORR, V_ORL, V_OFRAnd four
Normally closed solenoid valve V as a control device_CFL, V_CRR,
V_CRL, V _CFR, A reservoir 19 as a pair of control devices
₁, 19_TwoAnd a damper 24 as a pair of control devices₁,
24_TwoAre mounted from the first mounting surface 34a side. That is, the normally-open solenoid valve V_OFL, V_ORR, V
_ORL, V_OFRIndicates that the halves of the first mounting surface 34a
The corresponding fitting recess 35 so as to project from_FL, 35_RR,
35 _RL, 35_FRAnd normally closed solenoid valve V_CFL, V
_CRR, V_CRL, V_CFRAre half of the first mounting surface
34a so as to protrude from the corresponding fitting recess 36._FL,
36_RR, 36_RL, 36_FRIs fitted to. Also both reservoirs
19₁, 19_TwoIs the recess 37 for the reservoir₁, 37_TwoCollected in
Delivered and arranged. And damper 24₁, 24_TwoFigure 2
As shown in FIG.₁, 38_TwoThe open end of
Plug 43₁, 43 _TwoAnd liquid-tightly closed. Moreover, on the first mounting surface 34a of the base 34,
Is a normally open solenoid valve V_OFL, V_ORR, V _OFR, V_ORL, Always
Closed solenoid valve V_CFL, V_CRR, V_CFR, V_CRL, Both reservoirs
BA19 ₁, 19_Two, Both dampers 24₁, 24_TwoAnd each concave
Cover made of synthetic resin so as to cover portions 39 to 42
45, the lower portion of the cover 45 and the first
Damper 24 facing mounting surface 34a₁, 24_TwoAnd Liza
Server 19₁, 19_TwoIn between, the inside of the cover 45 is exposed to the atmosphere.
A passage 46 for communication is formed. That is, the cover 45
The inside is communicated with the atmosphere. With particular attention to FIG. 3, a pair of plungers
Amp 21₁, 21_TwoIs the normally open solenoid valve V_OFL,
V_ORR, V_OFR, V_ORLArrangement position and each normally closed solenoid valve
V_CFL, V _CRR, V_CFR, V_CRLBetween the array position of
It is built in the base 34 with the operating axis being coaxial. One plunger pump 21₁Is the base 3
4 and a pump housing 48 fitted and fixed to
The pump is fitted slidably in the housing 48 and
A plan for forming a pump chamber 49 with the housing 48
And a jaw 50. In addition, there is a liza inside the plunger 50.
Server 19₁(See FIG. 1) is provided with a suction chamber 51 which is always in communication
The valve is opened and sucked when the volume of the pump chamber 49 increases.
Suction valve 20 for connecting chamber 51 to pump chamber 49₁Is
It is arranged in the pump room 49. Also in the pump housing 48
Is the damper 24₁(See FIG. 1) Discharge chamber 52 always communicating with
Provided when the volume of the pump chamber 49 is reduced.
Discharge valve 23 for connecting pump chamber 49 to discharge chamber 52₁
Is disposed in the discharge chamber 52. The other plunger pump 21_TwoIs the suction valve
20_TwoAnd discharge valve 23_Two(See Fig. 1)
Plunger pump 21₁Is configured in the same way as
Plunger pump 21₁, 21_TwoTheir plunge
The protruding ends of the pumps 50 from the pump housings 48 are
Opening the second mounting surface 34b of the base 34
The base is made to face the bottomed storage hole 53 provided.
34. The motor 22 is located between the closed end of the storage hole 53
A cam chamber 55 is formed in
Fasten to the second mounting surface 34b of the base 34 so as to cover it.
The two plunger pumps 21₁, 21_Twoof
Output shaft 5 of motor 22 having an axis orthogonal to the operating axis
4 enters the cam chamber 55. Moreover, it goes out in the cam chamber 55.
An eccentric shaft portion 54a provided at the tip of the force shaft 54
Bearing 56 is installed, and the bearing 56
Double plunger pump 21 on outer surface of outer ring₁, 21_TwoIn
The ends of the plungers 50 are abutted. Eccentric shaft
54a has an axis eccentric from the rotation axis of the output shaft 54
Therefore, the bearing 56 is moved from the rotation axis of the output shaft 54.
The distance to the outer surface of the outer ring differs in the circumferential direction.
The bearing 56 performs a cam action with the rotation of the force shaft 54.
And both plunger pumps 21₁, 21_TwoPlunger
The reciprocating power is alternately applied to 50. The motor housing 57 of the motor 22 is
Is provided with a bracket 58 at one end thereof.
The racket 58 is formed by the plurality of screw members 59.
It is fastened to the second mounting surface 34b. Of the bracket 58
At a substantially central portion, a cylindrical shape fitted to the opening end of the storage hole 53 is provided.
The fitting cylinder 58a is provided integrally. Moreover, the output shaft 54
Has a bearing 60 interposed between the fitting cylindrical portion 58a and
The cam hole 55 and the storage hole 53 is opened.
The mouth edge extends over the entire periphery of the outer edge of the base end of the fitting cylinder 58a.
The annular seal member 61 that comes into contact with the second seal member is mounted. In this manner, the second mounting surface 34b is mounted.
The inside of the motor 22 is
The cam chamber 55 communicates with the cam chamber 55.
1 between the recess 40 provided on the mounting surface 34a
A communication hole 62 is provided in the base 34. Next, the operation of this embodiment will be described.
And the motor 22 communicates its inside with the cam chamber 55
The cam chamber 5 is mounted on the second mounting surface 34 b of the base 34.
5 is inside the cover 45 through the communication hole 62 and the concave portion 40.
Is communicated to. Moreover, the inside of the cover 45 is
Because it communicates with the atmosphere, the inside of the motor 22 and the cam
The chamber 55 is breathable, and the dew condensation and the
A decrease in sealing performance due to a pressure change is prevented. sand
That is, the recess 40 is covered with a cover 45,
40 is not directly exposed to water, and dust
Intrusion of water and dust is prevented as much as possible.
In order to allow the cam chamber 55 to breathe while
There is no need to provide a special structure such as a rinse.
Cost reduction by using the cover 45
Becomes possible. A first mounting provided with a recess 40
The surface 34a faces upward when the base 34 is mounted on the vehicle body 35.
The posture is in the downward direction.
Water and dust accumulate in the recesses 40 even if dust and dirt enter.
That can be avoided as much as possible. Therefore, the communication hole 6
2 prevents water from entering the cam chamber 55 through the
The communication hole 62 can be installed in a space as small as possible.
Even when formed with a small diameter so as to be small, foreign matter can enter the communication hole 62.
Clogging can be prevented as much as possible.
Step 21₁, 21_Two, Bearing 56 and motor 22
Rust can be prevented from occurring in the part. The embodiment of the present invention has been described in detail above.
The description is not limited to the above embodiment, but
Various designs without departing from the invention described in the scope
Changes can be made. [0032] As described above, according to the first aspect of the present invention,
If the motorRotate motor output shaft to motor housing
The motor is supported via freely supporting bearings.Cam inside
In the roomDirectlyCommunicateSo that the motorOn the second mounting surface
Attach, one end communicates with the cover and the other end
A communication hole that opens the cam chamber is provided in the base., Its base
Body with at least the first mounting surface in the vertical direction
The first mounting surface of the base and the cover
A passage communicating with the atmosphere inside the cover is provided between the lower part and the lower part.
It is formed so that its lower end is open to the atmosphereof
It is unnecessary to provide a new dedicated structure
To prevent water from entering and clogging by foreign matter
The cam chamber can be breathed with a simple structure using the existing cover
Of the sealing performance due to condensation and pressure changes in the cam chamber.
The drop can be prevented.The base is mounted on the body.
The first mounting surface is in the vertical position when
Therefore, even if water or dust enters the cover,
The accumulation of water and dust can be avoided as much as possible. [0033]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a hydraulic circuit diagram of a vehicle brake device. FIG. 2 is a partially cutaway side view of the brake fluid pressure control device. FIG. 3 is a sectional view taken along line 3-3 of FIG. 2; FIG. 4 is a front view of the base as viewed from a direction along line 4-4 in FIG. 2; [Description of Signs] 19 ₁ , 19 ₂ ··· Reservoirs 21 ₁ and 21 ₂ ··· Plunger pump 22 ··· Motors 24 ₁ and 24 ₂ ··· Damper 31 as control device Body 34 ... Base 34a ... First mounting surface 34b ... Second mounting surface 40 ... Recess 45 ... Cover 50 ... Plunger 54 ... Output shaft 55 ... Cam chamber 56 ... Bearing 62 as a cam ... Communication holes V _OFL , V _OFR , V _ORL , V _ORR ... _normally open solenoid valves V _CFL , V _CFR , V _CRL , V _CRR ... Normally closed solenoid valve as control device

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-11709 (JP, A) JP-A-7-156774 (JP, A) German Patent Application Publication 4438163 (DE, A1) (58) Search Field (Int.Cl. ⁷ , DB name) B60T 8/32-8/96

Claims (1)

(57) [Claim 1] A first mounting surface (34a) of a base (34).
And control devices (V _OFL , V _OFR , V _ORL , V _ORR ; V) mounted on the base (34) from the first mounting surface (34a) side.
_CFL , V _CFR , V _CRL , V _CRR ; 19 ₁ , 19 ₂ ; 24
_1, 24 ₂₎ cover communicated with the atmosphere inside (45) is mounted together with the cover, the second mounting surface provided on the substrate (34) facing in a direction different from the first attachment surface (34a) ( 34b), a cam chamber (5) is provided between the cam chamber (5) and the base (34).
The motor (22) forming 5) is mounted, and the plunger pumps (21 ₁ , 21 ₂ ) are mounted on the plunger (50).
Of the base (34) by projecting the end of the base (34) into the cam chamber (55).
And a cam (56) provided on an output shaft (54) of a motor (22) in a cam chamber (55) is brought into contact with an end of the plunger (50). In the above, the output is output to a motor housing (57) of the motor (22).
A bearing (60) for rotatably supporting the shaft (54)
In so that the interior of the motor (22) and directly communicating <br/> through the cam chamber (55) through, said motor (22) and the second mounting surface (3
4b), a communication hole (62) having one end communicating with the inside of the cover (45) and the other end opening to the cam chamber (55) is provided in the base (3).
4), and the base (34) has at least a first mounting surface (34).
a) is mounted on the vehicle body (31) in a posture oriented vertically.
And a first mounting surface (34a) of the base (34) and a cover.
Between the lower part of (45) and the cover (45)
A passage (46) that communicates with the
Characterized in that it is formed in the so that the brake fluid pressure GoSo location for a vehicle.