JPH08113128A - Anti-lock brake control device for vehicles - Google Patents

Abstract

(57) [Abstract] [Purpose] The number of parts in a vehicle anti-lock brake control device in which an orifice connected to a return pump or damper and a seat pipe for closely contacting a flare portion of a conduit leading to a master cylinder are coaxially provided on a base body. And the need for troublesome machining is eliminated, the malfunction of the normally open solenoid valve due to the generation of chips is prevented, the orifice is completely blocked, and the orifice is prevented from being displaced. [Structure] A base plate 34 is provided with a passage hole 71 for communicating an inner end with a return pump or a damper coaxially with a connection screw hole 74 _1, and a seat pipe 78 fitted to an outer end portion of the passage hole 71. The orifice forming portion 80 ₁ forming an annular orifice 25 ₁ with the inner surface of the passage hole 71 forms an annular passage 82 communicating with the inlet side of the normally open solenoid valve with the inner surface of the passage hole 71. At the same time, they are coaxially and integrally connected to each other via a connecting pipe portion 79 that allows the annular passage 82 to communicate with the inside of the seat pipe 78.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a normally open solenoid valve for switching communication / interruption between a master cylinder and a wheel brake, a normally closed solenoid valve for switching communication / interruption between a reservoir and the wheel brake, and an intake valve. A base body provided with a return pump having a port connected to the reservoir, a damper connected to a discharge port of the return pump, and an orifice interposed between the return pump or the damper and the normally open solenoid valve. Is provided with a connection screw hole which is coaxial with the orifice and opens to the outer surface of the base body, and the seat pipe is fixedly arranged so as to be located at the inner end of the connection screw hole and closely contacted with the seat pipe. A conduit having a flare portion at one end is connected to the master cylinder, and a screw member that presses the flare portion against the seat pipe and is screwed into the connection screw hole is fitted on the outer periphery of the conduit. About antilock brake control apparatus for a vehicle to be.

[0002]

2. Description of the Related Art Conventionally, such an anti-lock brake control device is already known, for example, from Japanese Utility Model Laid-Open No. 3-126868.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
A seat pipe and an orifice member, which is a member separate from the seat pipe, are press-fitted and fixed to the base body at positions spaced apart in the axial direction. For this reason, not only the number of parts increases, but also the orifice member needs to be perforated with a minute hole diameter, which is troublesome. In addition, the orifice may be clogged with chips generated when the sheet pipe is pressed into the base body, or the chips may flow to the normally open solenoid valve side, causing malfunction of the normally open solenoid valve. Insufficient press-fitting and fixing of the base material to the base body may cause the orifice position to shift due to the discharge pressure of the return pump.

The present invention has been made in view of the above circumstances, and reduces the number of parts and facilitates the processing to reduce the cost, and the clogging of the orifice due to the generation of chips and the normally open solenoid valve. It is an object of the present invention to provide an anti-lock brake control device for a vehicle, which prevents malfunction of the vehicle and further enables reliable fixing of the orifice.

[0005]

In order to achieve the above object, according to the present invention, the base body is provided with a passage hole for communicating an inner end with a return pump or a damper coaxially with the connection screw hole. In the seat pipe fitted to the outer end of the passage hole, an orifice forming portion forming an annular orifice between the seat pipe and the inner surface of the passage hole is formed in the annular passage communicating with the inlet side of the normally open solenoid valve. Is formed between the inner surface of the seat pipe and the inner surface of the seat pipe, and is coaxially and integrally connected to the seat pipe through a connecting pipe portion.

[0006]

According to the above construction, by fitting the seat pipe into the outer end portion of the passage hole, the connecting pipe portion and the orifice forming portion which are integral with the seat pipe are inserted into the passage hole to form the annular orifice. Also, an annular path is formed, and the number of parts can be minimized. Moreover, as long as the seat pipe is pressed by the flare of the conduit and is in the fixed position, the position of the orifice does not shift, and there is little possibility that chips will be generated when the seat pipe is fitted. The possibility that cutting chips will flow to the side is also small. Further, since it is not necessary to form a hole having a minute hole diameter, and the orifice is annular, it is possible to prevent the orifice from being entirely clogged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to an antilock brake control device for a four-wheel vehicle will be described below with reference to the drawings.

1 to 6 show a first embodiment of the present invention. FIG. 1 is a hydraulic circuit diagram of a vehicle brake device, and FIG. 2 is an antilock brake control in a state of being supported by a vehicle body. FIG. 3 is a side view of the apparatus, FIG. 3 is an enlarged plan view taken along arrow 3 of FIG. 2, FIG. 4 is a sectional view taken along line 4-4 of FIG. 3, and FIG.
FIG. 6 is an enlarged view of a main part of FIG.

First, in FIG. 1, the tandem type master cylinder M is provided with a pair of output ports 13a and 13b for outputting a braking fluid pressure in accordance with the depression of the brake pedal P, and a left front wheel brake _BFL and a right wheel brake. A proportional pressure reducing valve 14 _R connected to the rear wheel wheel brake B _RR , a right front wheel wheel brake B _FR , and a proportional pressure reducing valve 14 _L connected to the left rear wheel wheel brake B _RL , and the both output ports 13a. , 1
An antilock brake control device 15 is provided between the antilock brake control device 15 and 3b.

This anti-lock brake control device 15
_Are four _normally open solenoid valves V _OFL , which individually correspond to the wheel brake B _FL for the front left wheel, the wheel brake B _RR for the rear right wheel, the wheel brake B _FR for the front right wheel and the wheel brake B _RL for the rear left wheel, respectively. V _ORR , V _OFR , V _ORL and each normally open solenoid valve V
Four check valves 17 _FL , 17 _RR , 17 _FR and 17 _RL connected in parallel to _{OFL to} V _ORL and four normally closed solenoid valves V individually corresponding to the wheel brakes B _{FL to} B _RL , respectively. _CFL , V _CRR , V _CFR and V _CRL , and left front wheel wheel brake B _FL and right rear wheel wheel brake B _RR side and right front wheel wheel brake B _FR and left rear wheel wheel brake B
A pair of reservoirs 19 ₁ individually corresponding to the _RL side,
19 ₂ and the intake valves 20 ₁ to both the reservoirs 19 ₁ and 19 ₂ .
A pair of return pumps 21 connected through a 20 _{2 1,} 2
And 1 _2, both the return pump 21 _1, 21 ₂ common to motor 2
2 and the return valves 21 ₁ , 21 ₂ to the discharge valves 23 ₁ , 2
A pair of dampers 24 ₁ , 24 connected via 3 _2
2 and the output ports 13a, 13 of the master cylinder M
b and orifices 25 ₁ and 25 ₂ provided between the return pumps 21 ₁ and 21 ₂ , respectively, and the normally open solenoid valves V _{OFL to} V _ORL and the normally closed solenoid valves V _{CFL to} V.
The demagnetization / excitation of the _CRL is switched and controlled by the electronic control unit 26.

Normally open solenoid valve V_OFLIs the master cylinder M
One output port 13a and the wheel brake B for the left front wheel_FL
And a normally open solenoid valve V_ORRIs the output port
Wheel 13a and wheel brake B for the right rear wheel_RRRatio connected to
Example Pressure reducing valve 14_RAnd a normally open solenoid valve V_OFR
Is the other output port 13b of the master cylinder M and the front right
Wheel brake B for wheels_FRNormally open solenoid valve installed between
V_ORLIs the output port 13b and the wheel breaker for the left rear wheel.
B_RLProportional pressure reducing valve 14 connected to_LIs installed between
You. Check valve 17_FL~ 17_RLIs the corresponding wheel
Rake B_FL~ B _RLAllows only the flow of hydraulic fluid from
Each normally open solenoid valve V_OFL~ V_ORLConnected in parallel to
Be done.

The normally closed solenoid valve V _CFL is provided between the wheel brake B _FL for the left front wheel and the reservoir 19 ₁ and is a normally closed solenoid valve V _CRR.
Is between the proportional pressure reducing valve 14 _R and the reservoir 19 ₁ , the normally closed solenoid valve V _CFR is between the front wheel brake B _FR and the reservoir 19 ₂ , and the normally closed solenoid valve V _CRL is the proportional pressure reducing valve 1.
4 _L and the reservoir 19 ₂ , respectively.

Such anti-lock brake control device
According to No. 15, there is a possibility that each wheel will not lock.
When normally braking, each normally open solenoid valve V_OFL~ V_ORLDisappears
The valve is open in the magnetic state, and each normally closed solenoid valve V
_CFL~ V_CRLIs demagnetized and is closed. But
Output from one output port 13a of the master cylinder M
The braking fluid pressure applied is the normally open solenoid valve V_OFLLeft front through
Wheel brake B for wheels_FLNormally open solenoid valve
V_ORRAnd proportional pressure reducing valve 14_RFor the right rear wheel
Rake B_RRTo the other side of the master cylinder M
The braking fluid pressure output from the force port 13b is the normally open electromagnetic pressure.
Valve V_OFRWheel brake B for the right front wheel via _FRAct on
With normally open solenoid valve V_ORLAnd proportional pressure reducing valve 14_LTo
Via the wheel brake B for the left rear wheel_RLAct on.

At the time of anti-lock control when the wheel is about to enter the locked state during braking, the normally open type solenoid valve corresponding to the wheel that is about to enter the locked state among the _normally open solenoid valves V _{OFL to} V _ORL. Is excited to close the valve, and at the same time, of the normally closed solenoid valves V _{CFL to} V _CRL , the normally closed solenoid valves corresponding to the wheels are excited and opened. Then, a part of the brake fluid pressure is released to the reservoir 19 ₁ or 19 ₂ and reduced. When the brake fluid pressure is maintained, the normally open solenoid valves V _{OFL to} V _ORL are excited to close the valve, and the normally closed solenoid valves V _{CFL to} V _CRL are demagnetized to maintain the closed state. Of course, when increasing the braking fluid pressure, deenergize the normally open solenoid valves V _{OFL to} V _ORL and open them, and demagnetize the normally closed solenoid valves V _{CFL to} V _CRL to keep them closed. Good.

The motor 22 which drives the pair of return pumps 21 ₁ and 21 ₂ in common is operated during the antilock control, and the reservoirs 19 ₁ and 19
_The hydraulic fluid released to ₂ is returned from the pumps 21 ₁ and 21 ₂ to the dampers 24 ₁ and 24 ₂ and the orifices 25 ₁ and 25 _2.
And is returned to the upstream side of each normally open solenoid valve V _{OFL to} V _ORL . Therefore, the depression amount of the brake pedal P in the master cylinder M does not increase by the amount released to the reservoirs 19 ₁ and 19 ₂ and the return pumps 21 ₁ and 2 2
The pulsation of the hydraulic fluid sent from 1 ₂ is dampers 24 ₁ and 24
₂ and the orifices 25 ₁ and 25 ₂ are damped, and the pulsation is not transmitted to the brake pedal P.

Whether the wheels are likely to enter the locked state in the electronic control unit 26 which controls the demagnetization / excitation of the normally open solenoid valves V _{OFL to} V _ORL and the normally closed solenoid valves V _{CFL to} V _CRL . Wheel speed sensors 27 _FL , 27 _RR , 27 _FR , which individually detect the wheel speed of each wheel in order to judge whether
27 _RL detection signal is input, and a detection signal of a handbrake detection sensor 29 that detects whether or not the handbrake lever 28 is operated is also input. Further, when in the antilock control state, the electronic control unit 26
An alarm 30 such as a lamp activated by is connected to the electronic control unit 26.

In FIGS. 2, 3 and 4, the anti-roll
The stock brake control device 15 is formed in a block shape.
A metal base 34 is provided, and the base 34 is
Four normally open solenoid valves V_OFL, V_ORR, V_OFR, V_ORL,
Four normally closed solenoid valves V_CFL, V_CRR, V_CFR, V_CRL,
4 check valves 17_FL, 17_RR, 17_FR, 17_RL,one
Paired reservoir 19₁, 19₂, A pair of intake valves 20₁, 2
0₂, A pair of return pumps 21₁, 21₂, A pair of discharge valves
23₁, 23₂, A pair of dampers 24₁, 24₂Navi
A pair of orifices 25₁, 25₂Etc. are arranged, the base body
On the one surface 34a side of 34, the
Open type solenoid valve V_OFL, V_ORR, V_OFR, V _ORLAnd normally closed
Type solenoid valve V_CFL, V_CRR, V_CFR, V_CRLCover part of
Thus, the cover 38 is attached, and the other surface 3 of the base 34 is attached.
A motor 22 is attached to 4b.

The base body 34 is attached to the vehicle body 35. That is, the base body 3 is attached to the bracket 36 fixed to the vehicle body 35.
4 is provided with a support plate portion 36a facing the one surface 34a side and a pair of support plate portions 36b, 36b facing the other surface 34b side of the base body 34, and the base body 34 is attached to the support plate portion 36a via mounting means 37. And mounting means 37, 3
It is attached to the support plate portions 36b and 36b via 7.

The base 34 is provided with four normally open solenoid valves V _OFL , V _ORR , V _OFR , and V _ORL arranged in parallel, and four normally closed solenoid valves V _CFL , V _CRR ,
V _CFR and V _CRL are arranged in parallel in the arrangement direction of the _normally open solenoid valves V _{OFL to} V _ORL . Moreover, one output port 1 of the master cylinder M is provided on one side surface of the base body 34.
An input side conduit 39 ₁ connected to 3a (see FIG. 1) is connected corresponding to the _normally open solenoid valves V _OFL and V _ORR , and the other output port 13b of the master cylinder M (see FIG. 1).
The input side conduit 39 ₂ connected to (see) is connected to the _normally open solenoid valves V _OFR and V _ORL . Further, the output side conduits 40 _FL , 40 _RR , 40 _FR and 40 _RL connected to the wheel brakes B _FL , B _RR , B _FR and B _RL are normally open solenoid valves V, respectively.
_OFL and normally closed solenoid valve V _{CF L} , normally open solenoid valve V _ORR and normally closed solenoid valve V _CRR , normally open solenoid valve V _OFR and normally closed solenoid valve V _CFR , and normally open solenoid valve V _{The ORL} and the normally closed solenoid valve V _CRL are respectively connected to one side surface of the base 34.

Each of the normally open solenoid valves V _OFL , V _ORR , V _OFR ,
Since the V _ORL has basically the same configuration, hereinafter, the normally open solenoid valves V _OFL , V _ORR , V _OFR , V
The general structure of the _ORL will be described with a _normally open solenoid valve V _OFL .

In FIG. 5, a normally open solenoid valve V _OFL has a valve operating portion 43 _{O in} which a housing 42 _O accommodates a movable core and a valve body (not shown), and the valve operating portion 43 _O is electromagnetically driven. And an electromagnetic drive unit 44 for applying force. Thus, the housing 42 _O includes a substantially cylindrical housing main body 45 _O and a guide cylinder 46 that is coaxially projected from one end of the housing main body 45 _O , and the guide cylinder 46 has a closed end. The movable core is formed in a bottom cylindrical shape, and is housed in the guide cylinder 46 so as to be movable in the axial direction.

The base 34 is provided with a fitting recess 47 _O opening on one surface 34 a thereof, and the housing main body 45.
_{The O} is fitted into the fitting recess 47 _O such that one end thereof is substantially flush with the one surface 34 a of the base 34. Thus, the pressing plate 52 made of magnetic metal is fastened to the one surface 34a of the base 34 by a plurality of bolts 53 (see FIG. 4), and the housing main body 45 _O is sandwiched and fixed between the pressing plate 52 and the base 34. To be done. Moreover, the holding plate 52 is provided with a plurality of holes 52a, and the guide cylinder 46 has the holes 52a.
And is projected from the pressing plate 52.

The electromagnetic drive unit 44 includes a bobbin surrounding the guide cylinder 46 and a cylindrical coil assembly 48 in which a coil wound around the bobbin is covered with a mold portion made of synthetic resin, and the coil assembly. It is composed of a yoke 49 which is attached to 48. The yoke 49 is the pressing plate 5.
The guide tube 46 protruding from 2 is made to be able to pass through and is formed of a magnetic metal in a substantially U-shaped vertical cross section. The guide tube 46 is attached to the coil assembly 48 in which the yoke 49 is mounted. The protrusion from the pressing plate 52 is fitted. As a result, both ends of the yoke 49 sandwiching the coil assembly 48 are magnetically coupled by the guide cylinder 46.

Each normally closed solenoid valve V _CFL , V _CRR , V _CFR ,
Since V _CRL has basically the same configuration,
Hereinafter, the schematic configuration of the normally closed solenoid valves V _CFL , V _CRR , V _CFR , and V _CRL will be described using the normally closed solenoid valves V _CFL .

The normally closed solenoid valve V _CFL has a housing 42 _C.
It comprises a valve actuating portion 43 _C in which a movable core, a valve body and the like (not shown) are housed, and an electromagnetic driving portion 44 for applying an electromagnetic driving force to the valve operating portion 43 _C. Thus, the housing 42 _C includes a substantially cylindrical housing main body 45 _C and a guide cylinder 46 coaxially protruding from one end of the housing main body 45 _C.

The base 34 is provided with a fitting recess 47 _C opening on one surface 34 a thereof.
_C is fitted into the fitting recess 47 _C such that one end thereof is substantially flush with the one surface 34 a of the base 34, and is interposed between the pressing plate 52 and the base 34 which are fastened to the one surface 34 a of the base 34. The housing main body 45 _C is clamped and fixed. Thus, the guide cylinder 46 penetrates the hole 52a and is projected from the pressing plate 52, and the protruding portion of the guide cylinder 46 from the pressing plate 52 is fitted into the electromagnetic drive unit 44.

In all normally open solenoid valves V _{OFL to} V _ORL and all normally closed solenoid valves V _{CFL to} V _CRL , the yoke 4 is used.
The coil assembly 48 in which 9 is attached is sandwiched between the cover 38 and the pressing plate 52 so as to be covered with the synthetic resin cover 38 that is fastened to the base body 34. .

The cover 38 is formed in a substantially rectangular box shape whose open end is brought into contact with the base 34 or the pressing plate 52.
The outer closed end of the cover 38 has a step 55 facing outward.
Fitting tube 5 having a and 55a in the middle and extending inward
5, 55 are provided. Then, metal cylindrical spacers 56, 56 are fitted in the fitting cylinders 55, 55, and the spacers 56, 56 have heads capable of engaging with the step portions 55a, 55. The tightening screws 57, 57 to be inserted are screwed into the base body 34.

The cover 38 has all normally open solenoid valves V
_OFL ~V _ORL and the normally closed electromagnetic valve V _{CF L} ~V _CRL connection cord 58 continuous respectively to the coil (see FIG. 4) code outlet 59 for pulling to the outside is provided.

Between the arrangement positions of the normally open solenoid valves V _{OFL to} V _{ORL and} the arrangement positions of the normally closed solenoid valves V _{CFL to} V _CRL , the other surface 3 of the base body 34 at the central portion along the arrangement direction thereof.
4b has a motor 22 attached thereto, and return pumps 21 ₁ and 21 ₂ driven by the motor 22 are arranged along the arrangement direction of the normally open solenoid valves V _{OFL to} V _ORL and the normally closed solenoid valves V _{CFL to} V _CRL. And extends in the base 34.

As shown in FIG. 4, the damper 24 ₁ is disposed on the base 34 on the side opposite to the normally open solenoid valve V _OFL with respect to the normally closed solenoid valve V _CFL , and the damper 24 ₂ is normally closed solenoid valve V. _CFR
With respect to the normally open solenoid valve V _OFR , the reservoir 19 ₁ is provided on the base 34 on the side opposite to the normally open solenoid valve V _ORR with respect to the normally closed solenoid valve V _CRR. 19 ₂ is disposed on the base 34 on the side opposite to the normally open solenoid valve V _ORL with respect to the normally closed solenoid valve V _CRL .

Normally closed solenoid valve V_CFLRegarding normally open solenoid valve
V_OFLOn the side opposite to the one side 34a of the base 34, a recess for a damper is formed.
The part 61 is provided, and the damper 24 is provided.₁Is the base 34
And a pressing plate 52 that is fastened to one surface 34a of the base body 34.
The damper plate is fixedly sandwiched between
The open end of 61 is closed in a liquid-tight manner.
The damper chamber 63 is defined by the damper recess 61 and the closing plate 62.
Is done. Also the damper 24 ₂Is a normally closed solenoid valve V_CFRRelated
Then normally open solenoid valve V_OFROn the opposite side to the damper 24₁
It is constructed in the same way as.

Each normally open solenoid valve V_OFL, V_ORR, V_OFR,
V_ORLHousing main body 43 in _OOuter periphery and base
Between the bodies 34, those solenoid valves V_OFL, V_ORR,
V_OFR, V _ORLAnnular chamber 64 leading to the entrance of_O... that's it
Each normally closed solenoid valve V _CFL, V_CRR, V
_CFR, V_CRLHousing main body 43 in_CThe outer circumference of
And the solenoid valve V between the base 34._CFL, V_CRR,
V_CFR, V_CRLAnnular chamber 64 leading to the entrance of_C... that's it
Formed. Thus, they are arranged on the substrate 34 adjacent to each other.
Normally open and normally closed solenoid valves V_OFL, V_CFL;
V_ORR, V_CRR; V_OFR, V_{CF R}; V_ORL, V_CRLRing of
Room 64_O, 64_CIs a communication passage provided in the base body 34.
65 ... Are communicated with each other. Also, one side of the base 34
On the surface, output connection screw hole 66_FL, 66_RR, 66_FR, 6
6_RLAre provided coaxially with the communication passages 65 ...
These connection screw holes 66_FL~ 66_RLLocated at the inner edge of
The seat pipes 67 connected to the respective communication passages 65 ...
It is pressed into the body 34. In addition, each wheel brake B_FL, B_RR,
B_FR, B_RLOutput side conduit 40_FL, 4
0_RR, 40_FR, 40_RLAt one end of the seat pipe 67
Is provided with a tapered flare portion 68 ...
And each of the conduits 40_FL~ 40_RLIt was fitted on the outer circumference of
The connection screw holes 66 corresponding to the same members 69 ..._FL~ 66_RL
, And the flare portions 68 ...
The sheet pipes 67 are pressed against each other.

The base 34 has a normally closed solenoid valve V._CFLEntrance of
The fitting recess 47 so as to communicate with the _CExhaust coaxially connected to
An exit passage 70 is provided, and another normally closed solenoid valve V_CRRPV
_CFR, V_CRLCorrespondingly, the discharge passage is provided.
Thus, the normally closed solenoid valve V_CFL, V _CRRThe discharge passage 70 of
Server 19₁Normally closed solenoid valve V_CFR, V_CRL
The discharge passage of the reservoir 19₂Be communicated to.

The base body 34 is provided with passage holes 71 ... Which communicate the inner ends of the damper chambers 63 of the dampers 24 ₁ and 24 ₂ , respectively, with an axis perpendicular to the axes of the return pumps 21 ₁ and 21 _2. Set up. In addition, double return pumps 21 ₁ , 2
Between the outer circumference of 1 ₂ and the base body 34, the discharge valves 23 ₁ , 23
_An annular passage 72 ... Is formed which communicates with the outlets of the return pumps 21 ₁ and 21 ₂ via ₂ (see FIG. 1).
Are provided with communication passages 73 ... For communicating the annular passages 72 ... With an intermediate portion of the passage holes 71.

Referring also to FIG. 6, the base body 34 has an input connection screw hole 74 ₁ , which opens to the outer surface of the base body 34.
74 ₂ is provided coaxially with the outer ends of the passage holes 71. On the other hand, the input side conduits 39 ₁ and 3 individually connected to both output ports 13 a and 13 b of the master cylinder M.
A flare portion 75 is provided at one end of 9 ₂ , and the input connection screw hole 7 is provided on the outer periphery of both input side conduits 39 ₁ and 39 _2.
Screw members 76 and 76 screwed into 4 ₁ and 74 ₂ respectively.
Is inserted.

The passage holes 71 ... Are the input connection screw holes 7.
Large-diameter hole portion 71a on one end side coaxially connected to 4 ₁ and 74 ₂
And the small-diameter hole portion 7 on the other end side which is the damper 24 ₁ , 24 ₂ side.
1c are formed in a stepped manner so as to be coaxially connected to each other through the medium diameter hole portion 71b, and the communication passages 73 ...
Are communicated with the small diameter holes 71c, respectively.

The large-diameter hole portion 71 in the passage hole 71.
a and a portion of the small-diameter hole portion 71b on the large-diameter hole portion 71a side, a seat pipe 78 is fitted by light press-fitting so as to be located at the inner ends of the input connection screw holes 74 ₁ and 74 _2. It The seat pipe 78 includes a connecting pipe portion 79.
The orifice forming portion 80 ₁ is coaxially and integrally connected via the.

The connecting pipe portion 79 is formed in a cylindrical shape having a communication passage 81 which is coaxially connected to the inside of the seat pipe 78 and has a closed end. The outer diameter of the connecting pipe portion 79 communicates with each other. It is set so that an annular path 82 is formed between the hole 71 and the inner surface of the medium diameter hole portion 71b. Moreover, a plurality of communication holes 83 ... Which communicate the annular passage 82 with the communication passage 81 are formed in the side wall of the connecting pipe portion 79, and the annular passage 82 communicates with the inside of the seat pipe 78.

The orifice forming portion 80 ₁ is connected to the connecting pipe portion 79.
A large diameter portion 80a that is coaxial with the outer surface and is coaxial
And a small-diameter portion 80b coaxially connected to the large-diameter portion 80a are formed into a stepped rod shape. Thus, the small diameter part 80
b is inserted coaxially into the small-diameter hole portion 71c of the passage hole 71 ... And the annular orifice 25 ₁ , between the outer surface of the small-diameter portion 80b and the inner surface of the small-diameter hole portion 71c.
25 ₂ is formed.

On the other hand, the base 34 is provided with inlet passages 84 ... Opening at the bottom of the fitting recesses 47 _O so that they are connected to the inlets of the _normally open solenoid valves V _OFL and V _ORR , respectively. The passage 84 communicates with the annular passage 82 corresponding to the input-side conduit 39 ₁ . Further, the base body 34 is provided with inlet passages that open to the bottom of the fitting recesses 47 _O so as to be connected to the inlets of the _normally open solenoid valves V _OFR and V _ORL , respectively, and these inlet passages are the input side conduits 39 ₂ Is communicated with the annular road 82.

Then, the input connection screw hole 74₁Screwed into
Input side conduit 39₁Flare part 75
By pressing the sheet pipe 78 against the normally open electromagnetic
Valve V _OFL, V_ORRThe entrance passage 84 ...
Connection to one output port 13a
Becomes

The other output port in the master cylinder M
Input side conduit 39 connected to the port 13b₂Is the input side conduit
39₁Input screw hole of the base 34 having the same structure as
74 ₂Connected to the normally open solenoid valve V_OFR, V_ORLIs on
Normally open solenoid valve V_OFL, V_{OR R}Input side in the same manner as
Conduit 39₂Connected to the return pump 21₂Vomiting
Orifice 25 at the outlet₂Connected via

Next, the operation of the first embodiment will be described. The base 34 for connecting the input side conduits 39 ₁ , 39 ₂ connected to the output ports 13a, 13b of the master cylinder M.
The input side connecting screw holes 74 ₁ and 74 _{2 provided} coaxially with the dampers 24 ₁ and 24 ₂ and the return pump 21 ₁ ,
The passage holes 71 communicating with the 21 ₂ ... are provided in the base 34.
Moreover, the orifice forming portion 80 ₁ is connected to the seat pipe 78 fitted to the outer end portion of the passage hole 71 through the connecting pipe portion 79.
Are connected coaxially and integrally, and the orifice forming portion 80 ₁
And the inner surface of the passage hole 71 ...
5 ₁ , 25 ₂ are formed.

Therefore, it is not necessary to prepare a member different from the seat pipes 78 to form the orifices 25 ₁ and 25 _2, and the number of parts can be reduced. Moreover, since it is not necessary to perform the perforation processing with a minute hole diameter, the cost can be reduced in combination with the reduction in the number of parts.

Further, since the seat pipe 78 is fitted to the base 34, the possibility of cutting chips is low, and the cutting chips cause malfunction of the _normally open solenoid valves V _OFL , V _ORR , V _OFR and V _ORL. Can be prevented. Moreover, orifice 2
5 ₁ and 25 ₂ are formed by the orifice forming portion 80 _{1 which} is integral with the pipe sheet 78 which is prevented from being detached outward by the screw members 76 which are screwed into the input side connecting screw holes 74 ₁ and 74 _2. Therefore, the positions of the orifices 25 ₁ and 25 ₂ are not displaced even by the action of the discharge pressure from the return pumps 21 ₁ and 21 ₂ .

Further, since the orifices 25 ₁ and 25 ₂ are annular, even if dust is mixed in the working fluid, the orifices 25 ₁ and 25 ₂ are not completely clogged.

FIG. 7 shows a second embodiment of the present invention, and the portions corresponding to those of the first embodiment are designated by the same reference numerals.

An orifice forming portion 80 ₂ is coaxially and integrally connected to the seat pipe 78 via a connecting pipe portion 79. The orifice forming portion 80 ₂ has a larger diameter than the connecting pipe portion 79. Is formed. The outer diameter of the orifice forming portion 80 ₂ is equal to the medium diameter hole portion 71 of the passage hole 71.
annular orifices 25 ₁ ′, 25 ₂ ′ between the inner surface of b and
To be formed.

By the way, the orifices 25 ₁ ′ and 25 ₂ ′ formed in an annular shape are larger in diameter than the orifices 25 ₁ and 25 ₂ in the first embodiment, and the axial length L ₁ thereof is equal to the orifice 25. _{When the} length is set to be the same as the axial length L _{2 of 1} , 25 ₂ (see FIG. 6), the aperture ratio becomes large. Therefore, the axial length L ₁ of the orifices 25 ₁ ′ and 25 ₂ ′ is the same as the orifices 25 ₁ and 2 in the first embodiment.
Than 5 _second axial length L ₂ is set to the large (L _I> L _2).

The same effects as those of the first embodiment can be obtained by the second embodiment.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible to do.

For example, the orifices 25 ₁ , 25 ₂ ; 2
A damper 24 connected to the return pumps 21 ₁ and 21 ₂ between the 5 ₁ ′ and 25 ₂ ′ and the return pumps 21 ₁ and 21 _2.
The present invention can also be applied to an antilock brake control device in which ₁ , 24 ₂ are arranged.

[0054]

As described above, according to the present invention, the base body is provided with the passage hole for communicating the inner end with the return pump or the damper coaxially with the connection screw hole, and is fitted to the outer end portion of the passage hole. In the seat pipe to be fitted, an orifice forming portion forming an annular orifice with the inner surface of the passage hole forms an annular passage communicating with the inlet side of the normally open solenoid valve with the inner surface of the passage hole. At the same time, the annular passage is connected coaxially and integrally through a connecting pipe portion that communicates with the seat pipe, so that the number of parts can be reduced and cost reduction can be achieved by eliminating the need for boring a minute hole diameter. Moreover, it is possible to prevent the generation of chips and prevent malfunction of the normally open solenoid valve, and it is possible to prevent the position of the orifice from being displaced due to the discharge pressure of the return pump. Orifice It is also possible to prevent that results in a totally clogged.

[Brief description of drawings]

FIG. 1 is a hydraulic circuit diagram of a vehicle brake device according to a first embodiment.

FIG. 2 is a side view of the antilock brake control device in a state of being supported by the vehicle body.

FIG. 3 is an enlarged plan view taken along arrow 3 of FIG.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is an enlarged view of a main part of FIG.

FIG. 7 is a sectional view corresponding to FIG. 6 of the second embodiment.

[Explanation of symbols]

15 ... Antilock brake control device 19 ₁ , 19 ₂ ... Reservoir 21 ₁ , 21 ₂ ... Return pump 24 ₁ , 24 ₂ ... Damper 25 ₁ , 25 ₁ ′, 25 ₂ , 25 ₂ ′ ... Orifice 34 ... Base body 39 ₁ , 39 ₂ ... Conduit 71 ... Passage hole 74 ₁ , 74 ₂ ... Connection screw hole 75 ... Flare part 76 ... Screw member 78 ... -Seat pipe 79 ... Connection pipe portion 80 ₁ , 80 ₂ ... Orifice forming portion 82 ... Annular path B _FL , B _FR , B _RL , B _RR ... Wheel brake M ... Master cylinder V _CFL , V _CFR , V _CRL , V _CRR ... Normally closed solenoid valve V _OFL , V _OFR , V _ORL , V _ORR ... Normally closed solenoid valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Ota 840, Kokubu, Ueda City, Nagano Prefecture Nissin Kogyo Co., Ltd.

Claims (1)

[Claims] 1. A master cylinder (M) and a wheel breaker.
Ki (B_FL, B_FR, B _RL, B_RR) Switching between communication and interruption
Normally open solenoid valve (V_OFL, V_OFR, V_ORL, V_ORR)
And the reservoir (19₁, 19₂) And the wheel breaker
Ki (B_FL, B_FR, B_RL, B_RR) Switching between communication and interruption
Normally closed solenoid valve (V_CFL, V_CFR, V_{CR L}, V_CRR)
And the suction port is the reservoir (19₁, 19₂) Connected to
Return pump (21₁, 21₂) And the return pump (2
1₁, 21₁) The damper (24₁,
24₂) And the return pump (21₁, 21₂) Or da
Computer (24₁, 24₂) And the normally open solenoid valve (V_OFL,
V_OFR, V_ORL, V_ORR)
Liffith (25₁, 25₂25₁', 25₂′) And
The orifice (25₁,
25₂25₁', 25₂′) Coaxial with the substrate (3
4) Connecting screw hole (74₁, 74₂)
Is provided, and the connection screw hole (74₁, 7
4₂) Seat pipe (7
8) is fixedly placed and closely contacts the seat pipe (78).
A conduit (39) having a flared portion (75) at one end₁,
39₂) Is connected to the master cylinder (M),
A part (75) is pressed against the seat pipe (78) to connect.
Hole (74₁, 74₂) Screw member (76) screwed to
Is the conduit (39₁, 39₂) For the vehicle
In the lock lock brake control device, the base body (34)
Return the inner end to the pump (21₁, 21₂) Or Dan
PA (24₁, 24₂) Is connected to the passage hole (71).
Continuation screw hole (74₁, 74₂) Is provided coaxially with the passage
Seat pipe (78) fitted to the outer end of the hole (71)
Has an annular orifice between the inner surface of the passage hole (71) and
(25₁, 25₂25₁', 25₂′) Forming
Liffith forming part (80₁, 80₂) Is a normally open solenoid valve
(V_OFL, V_OFR, V_ORL, V_ORR) Leading to the entrance side
An annular path (82) is formed between the inner surface of the passage hole (71).
And the ring road (82) in the seat pipe (78)
Coaxially and integrally through the connecting pipe part (79) to communicate
Vehicle anti-lock breaker characterized by being installed in series
Control device.