CN102529923B - Brake equipment - Google Patents
Brake equipment Download PDFInfo
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- CN102529923B CN102529923B CN201110434454.6A CN201110434454A CN102529923B CN 102529923 B CN102529923 B CN 102529923B CN 201110434454 A CN201110434454 A CN 201110434454A CN 102529923 B CN102529923 B CN 102529923B
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- piston body
- valve
- plate member
- brake equipment
- elastomeric element
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Abstract
The invention provides a kind of brake equipment with the resin-made piston of good durability.This brake equipment has: be assembled in be formed at housing have the piston body in bottom outlet and have make valve body from valve seat part from the pressure regulating valve of valve rod; Described brake equipment has and to utilize when ABS (Anti-lock Braking System) controls the stroke of piston body can there being in bottom outlet the liquid storage function stockpiling the braking liquid flowed out in the brake wheel cylinder of vehicle.Form piston body by resin forming, and on the crown of piston body, be provided with the quality duromer harder than resin, via duromer, piston body is abutted with valve rod.
Description
Technical field
The present invention relates to the brake equipment with the liquid storage function that can stockpile braking liquid.
Background technology
In the technology described in patent document 1, by being formed in the liquid storage piston in the brake equipment that uses in anti-lock brake system etc. with resin, eliminate flow ring etc. required when piston is metal piston.
Patent documentation 1:(Japan) JP 2006-151362 publication
But, in the above prior art, along with the reduction of piston intensity, loss and breakage etc. may be there is.
Summary of the invention
The object of the present invention is to provide the brake equipment of the resin-made piston with good durability.
For achieving the above object, providing a kind of brake equipment in the present invention, it is characterized in that, having: housing, its inside is formed with oil circuit; Piston body, its be assembled in be formed at described housing and be communicated with described oil circuit have in bottom outlet; First elastomeric element, it exerts a force to the bottom direction of described piston towards described hole; And pressure regulating valve, it is configured on described oil circuit, there is valve body, valve rod and the second elastomeric element, described valve rod is configured between the crown of described piston body and described valve body, the valve seat part that described valve body is abutted from described valve body from, the end side of described second elastomeric element abuts described valve body and direction towards described seat portion exerts a force, and described second elastomeric element has the elastic force more weak than described first elastomeric element; Described brake equipment has and utilizes the stroke of described piston body can have in bottom outlet described the liquid storage function stockpiling the braking liquid flowed out in the brake wheel cylinder of vehicle when ABS (Anti-lock Braking System) controls, described piston is formed by resin forming, and on the crown of described piston body, be provided with the duromer that quality is harder than described resin, via described duromer, described piston body is abutted with described valve rod.
In addition, the invention provides a kind of brake equipment, it is characterized in that, have: phenolic piston body, it has been arranged in bottom outlet, this has bottom outlet to be formed at inside and has the housing of oil circuit and be communicated with described oil circuit, when ABS (Anti-lock Braking System) controls, described phenolic piston body described have in bottom outlet carry out stroke and move; Plate member, it is arranged on the crown of described piston body, and abrasion test is higher than described resin; First elastomeric element, it exerts a force to the bottom direction of described piston towards described hole; And pressure regulating valve, it has valve body, valve rod and the second elastomeric element, described valve body is configured on described oil circuit, described valve rod is configured between described plate member and described valve body, the valve seat part that described valve body is abutted from described valve body from, the end side of described second elastomeric element abuts described valve body and direction towards described seat portion exerts a force, and described second elastomeric element has the elastic force more weak than described first elastomeric element.
Therefore, according to the present invention, the wearing and tearing of piston crown can be suppressed, thus the brake equipment of the resin-made piston with good durability can be provided.
Accompanying drawing explanation
Fig. 1 is the hydraulic circuit diagram of the brake liquid-pressure control device of the first embodiment;
Fig. 2 is the enlarged cross-sectional view of the liquid reserve tank structure representing the first embodiment;
Fig. 3 (a) (b) (c) is the figure of the piston body representing the first embodiment;
Fig. 4 is the sketch of Fabrication procedure when representing the piston body utilizing resin insert-molding first embodiment;
The enlarged cross-sectional view of state when Fig. 5 is the piston body arrival bottom dead point representing the first embodiment;
Fig. 6 is the enlarged cross-sectional view of the liquid reserve tank structure representing the second embodiment;
Fig. 7 is the sketch of the piston body representing the 3rd embodiment;
Fig. 8 is the enlarged cross-sectional view of the liquid reserve tank structure representing the 4th embodiment;
Fig. 9 is the enlarged cross-sectional view of the liquid reserve tank structure representing other embodiments.
Description of reference numerals
7 pressure regulating valves; 10 liquid flow paths; 10a liquid flow path; 10b liquid flow path; 11 liquid flow paths; 13 liquid flow paths; 15 liquid reserve tanks; 31 housings; 31a has bottom outlet; 31b path cylinder portion; 31c pressure regulating valve reception hole; 32 brake liquid-pressure control devices; 71 valve base parts; 71a seat portion; 72a ball part; 73 pressure regulating valve retracing springs; 74 valve rods; 75 filter elements; 151 fixed partss; 152 coil springs; 153 piston bodies; 153a cylindrical portion inner circumferential; Bottom 153a1; 153b knit line forming portion; 153e annular ditch groove; 153g claw; 153h piston area; 153j crown; 153m vapor-deposited film; 154 annular seal member; 155 plate member; 155c knock hole; 160 plate member; 300 stem member; 301 plate member; 302 valve stem; M/C master cylinder; P pump unit; W/C brake wheel cylinder.
Detailed description of the invention
[the first embodiment]
[structure of braking hydraulic circuit]
Fig. 1 is the hydraulic circuit diagram of the brake liquid-pressure control device 32 of the first embodiment.This hydraulic circuit is formed in the hydraulic control unit 30 that is provided with between master cylinder M/C and brake wheel cylinder W/C, hydraulic control unit 30 has the housing 31 of the roughly cuboid cut by aluminium block, in this housing 31, offer many oil circuits etc., and there is each valve described later and pump unit and motor.
The demand hydraulic pressure that this brake liquid-pressure control device 32 controls (VDC:VehicleDynamics Control), anti-skid brake system (ABS:Anti-lock Brake System) according to the vehicle dynamic carrying out self-controller carries out fluid control.In brake liquid-pressure control device 32, be formed by the X matched tube structure of these two System's composition of braking hydraulic circuit 21S of the braking hydraulic circuit 21P of P system and S system.The brake wheel cylinder W/C (FL) of the near front wheel, the brake wheel cylinder W/C (RR) of off hind wheel is connected with in P system; The brake wheel cylinder W/C (FR) of off front wheel, the brake wheel cylinder W/C (RL) of left rear wheel is connected with in S system.Brake liquid-pressure control device 32 and each brake wheel cylinder W/C and the brake wheel cylinder port one 9RL being opened in housing 31 end face, 19FR, 19FL, 19RR connect.And pump unit P is duplex gear pump, its by motor M drive by be arranged at respectively P system, S system external meshing tooth to the gear type pump PP formed and gear type pump PS.
The master cylinder port 20P that master cylinder M/C and hydraulic control unit 30 are offered via the port joint face at housing 31,20S, is connected to liquid flow path 18P, on 18S.This liquid flow path 18 is connected by liquid flow path 10P, 10S with the suction side of pump unit P.On liquid flow path 18P, between the connecting portion that master cylinder port 20P is connected with liquid flow path 18P and liquid flow path 10P, be provided with master cylinder pressure sensor 22.
The discharge side of pump unit P and each brake wheel cylinder W/C are connected by liquid flow path 11P, 11S.On above-mentioned each liquid flow path 11, be provided with the pressure charging valve 3FL that belong to normal-open electromagnetic valve corresponding with each brake wheel cylinder W/C, 3RR, 3FR, 3RL.And on each liquid flow path 11, between each pressure charging valve 3 and pump unit P, be provided with check valve 6P, 6S.Each check valve 6 allows that brake fluid pressure flows from pump unit P to pressure charging valve 3 direction, but forbids rightabout flowing.In addition, on each liquid flow path 11, between each pressure charging valve 3 and pump unit P, be provided with discharge pressure sensor 23P, 23S.
Further, on each liquid flow path 11, be provided with the liquid flow path 16FL walking around each pressure charging valve 3,16RR, 16FR, 16RL, liquid flow path 16 be provided with check valve 9FL, 9RR, 9FR, 9RL.Each check valve 9 allows that brake fluid pressure flows from brake wheel cylinder W/C to pump unit P direction, but forbids rightabout flowing.
Master cylinder M/C and liquid flow path 11 are connected by liquid flow path 12P, 12S, and liquid flow path 11 and liquid flow path 12 converge between pump unit P and pressure charging valve 3.On above-mentioned each liquid flow path 12, be provided with the gate valve (ゲ mono-ト ア ウ ト バ Le Block) 2P, the 2S that belong to normal-open electromagnetic valve.And on each liquid flow path 12, be provided with the liquid flow path 17P walking around each gate valve 2,17S, this liquid flow path 17 is provided with check valve 8P, 8S.Each check valve 8 allows that brake fluid pressure is from the flowing of master cylinder M/C lateral braking wheel cylinder W/C direction, but forbids rightabout flowing.Master cylinder M/C and liquid reserve tank 15P, 15S are connected by liquid flow path 10aP, 10aS, are provided with the pressure regulating valve 7P with non-return valve function, 7S between liquid reserve tank 15 and master cylinder M/C.
Be provided with liquid reserve tank 15P, 15S in the suction side of pump unit P, this liquid reserve tank 15 is connected by liquid flow path 10bP, 10bS with pump unit P.
Brake wheel cylinder W/C and liquid flow path 10 are connected by liquid flow path 13P, 13S, and liquid flow path 13 and liquid flow path 10 converge between pressure regulating valve 7 and liquid reserve tank 15.Above-mentioned each liquid flow path 13 is respectively equipped with the reducing valve 4FL belonging to normal-closed electromagnetic valve, 4RR, 4FR, 4RL.
At this, and that the arrange effect of pressure regulating valve 7 adjacent with liquid reserve tank 15 is described.When normal brake application, when namely each valve and pump etc. do not work, if produce brake fluid pressure, then closing pressure-regulating valve 7 at master cylinder M/C, cut off the stream between master cylinder M/C and liquid reserve tank 15.Then, via liquid flow path 18, provide braking liquid to each brake wheel cylinder W/C.Then, when ABS works, if close pressure charging valve 3 as initial actuating, open reducing valve 4, then the braking liquid in brake wheel cylinder W/C flows into liquid reserve tank 15 via liquid flow path 13.Now, by the work of pump unit P, the braking liquid having flowed into liquid reserve tank 15 is picked up via liquid flow path 11, and is back to master cylinder M/C.When VDC works, closing gate valve 2, opens the pressure charging valve 3 corresponding with desired wheel, and pump unit P is worked.Now, even if pressure regulating valve 7 cuts out, also by the sucking action of pump unit P, make decompression in liquid reserve tank 15, thus push pressure regulating valve 7 open.Thus, pick up braking liquid from master cylinder M/C, provide to required brake wheel cylinder W/C the braking liquid be pressurized.
Fig. 2 is the enlarged cross-sectional view of the liquid reserve tank structure representing the first embodiment.In the below of housing 31, offer upward cylindrical shape and have bottom outlet 31a, having the housing lower opening place of bottom outlet 31a to be formed with fixing holding surface 31a2, this fixing holding surface 31a2 keeps fixed parts 151 by gripping portion's (カ シ メ fixes) 31a3.Fixed parts 151 has outer peripheral edges and is gripped flange part 151a that portion 31a3 clamps, and the cylindrical portion 151b that formed and the occlusive part that form the holding surface 151c that coil spring 152 (first elastomeric element) one end kept bending from flange part 151a downwards, is formed with airport 151d at the substantial middle place of this occlusive part.Be configured to thus, barometric pressure always acts on the below of piston body 153.
Bottom outlet 31a is had to have: the piston bearing surface 31a1 abutted with the piston area 153h of piston body 153; And aperture is little and be formed at the path cylinder portion 31b of the centre of bottom outlet 31a compared with piston bearing surface 31a1.The liquid flow path 13 be communicated with reducing valve 4 and the liquid flow path 10b be communicated with the suction side of pump unit P, be connected with path cylinder portion 31b.Be formed with cylindric pressure regulating valve reception hole 31c in the more top of path cylinder portion 31b, this pressure regulating valve reception hole 31c has center shaft OR in the position of the center shaft OP departing from center shaft and the piston body 153 having bottom outlet 31a.The liquid flow path 10a be communicated with master cylinder M/C is connected with above pressure regulating valve reception hole 31c.
The filter element 75 of the impurity in braking liquid that removing flows into from liquid flow path 10a and chimeric with filter element 75 and form the valve base part 71 of pressure regulating valve 7 is accommodated with in pressure regulating valve reception hole 31c.In the region that upper end and the filter element 75 by valve base part 71 surrounds, the pressure regulating valve retracing spring 73 (the second elastomeric element) being provided with ball part 72 (valve body) and this ball part 72 is exerted a force towards valve base part 71 side.In addition, the elastic force of pressure regulating valve retracing spring 73 is set to more weak than the elastic force of coil spring 152, under the state not having brake fluid pressure effect, is formed and utilizes the elastic force of coil spring 152, upwards boosts the structure of ball part 72 via valve rod 74.
Valve base part 71 has through hole 71b, retaining hole 71d and opening 71c in axial centre, and wherein, this through hole 71b accommodates the valve rod 74 abutted with ball part 72, and forms braking liquid path between valve rod 74 periphery; The aperture of this retaining hole 71d is less than through hole 71b, and keeps diametrically by valve rod 74; This opening 71c offers multiple in the position around retaining hole 71d from the below of valve base part 71, and is communicated with partly with the end portion of through hole 71b.Be formed with mortar shape seat portion 71a in ball part 72 side of through hole 71b, when ball part 72 is installed on seat portion 71a, between liquid flow path 10a and path cylinder portion 31b, do not have braking liquid to flow.On the other hand, if utilize valve rod 74, ball part 72 is resisted the elastic force of pressure regulating valve retracing spring 73 and is boosted, after the filter of the braking liquid then provided from liquid flow path 10a by filter element 75, by the gap between through hole 71b and valve rod 74 periphery, flow out from opening 71c to path cylinder portion 31b.
Valve rod 74 is bar-shaped metal parts, there is valve rod leading section 74a, valve rod pars intermedia 74b and valve rod bottom 74c, wherein, the diameter of this valve rod leading section 74a is larger than the aperture of retaining hole 71d and abut with ball part 72, the diameter of this valve rod pars intermedia 74b is roughly the same with the aperture of retaining hole 71d and be formed as longer than valve rod leading section 74a, and this valve rod bottom 74c is the taper of reduced diameter from valve rod pars intermedia 74b and abuts with the end face 155b of plate member 155 described later.In addition, valve rod 74 is formed as the miscellaneous part different from piston body 153, and when the path increment of piston body 153 is more than the length of valve rod pars intermedia 74b, valve rod bottom 74c is separated with the end face 155b of plate member.In other words, valve rod leading section 74a has the function of block by abutting with retaining hole 71d upper end.In addition, the center shaft OR of valve rod 74 as previously mentioned, departs from the center shaft OP (centre of gration) of piston body 153 and configures.
Piston body 153 is the parts of resin forming, and what be formed as having bottom 153a1 has bottom tube-like.The cylinder periphery of piston body 153 has: upper periphery portion 153f, annular ditch groove 153e, sealing element maintaining part 153d, reducing diameter part 153c and knit line forming portion 153b.Wherein, this upper periphery portion 153f path that to be formed as diameter slightly less than the inner circumferential aperture having bottom outlet 31a; This annular ditch groove 153e is formed at the below of upper periphery portion 153f and receives annular seal member 154; Sealing member retainer section 153d is formed with the diameter roughly the same with there being the inner circumferential aperture of bottom outlet 31a and keeps annular seal member 154; This reducing diameter part 153c is formed at the below of sealing element maintaining part 153d, and its diameter is less than has the inner circumferential aperture of bottom outlet 31a and roughly the same with the diameter of upper periphery portion 153f; This knit line forming portion 153b is formed at the below of reducing diameter part 153c and has the diameter roughly the same with there being the inner circumferential aperture of bottom outlet 31a.Annular seal member 154 will be divided into hydraulic pressure chamber, be divided into energy chamber by below it above it.
At this, knit line refers to when resin forming (insert-molding), leaving the position of gate location (injecting inlet during molten resin in die cavity), when the resin flowed in die cavity is converged with the resin flowed into by other paths and solidifies, the residual part as resin joint mark each other.Usually, there is the trend of precision step-down in the part being formed with knit line.In a first embodiment, below annular seal member 154, the position that is namely divided as energy chamber has knit line forming portion 153b.That is, formed piston body 153 in the mode forming knit line in the position so not high to the accuracy requirement relevant to fluid tight grade, in other words, do not formed knit line in the position that accuracy requirement is high.
The cylindrical portion inner circumferential 153a of piston body 153 is formed as the large footpath slightly larger than coil spring 152, and on the 153a1 of bottom, maintain the other end of coil spring 152.Being formed at the middle section (i.e. crown 153j) of piston area 153h of piston body 153 end face, being molding by insert and being assembled with the metal plate member 155 as the quality duromer harder than the resin of piston body 153.Plate member 155 is discoid corrosion-resistant steel member, and its outer diameter D P is greater than the outer diameter D S of coil spring 152.
If namely utilize the bottom 153a1 of resinous piston body 153 to keep coil spring 152, then always act on the elastic force of coil spring 152 in this position.Suppose to make the external diameter of metal plate member 155 be the external diameter being less than coil spring 152, then from when axially seeing, the abutted position of coil spring 152 is separated diametrically with plate member 155, causes effect on crown 153j to have shearing force, thus likely reduces durability.On the other hand, as in the first embodiment shown, if the outer diameter D P of plate member 155 is greater than the outer diameter D S of coil spring 152, then from when axially seeing, the abutted position of coil spring 152 is not separated diametrically with plate member 155 and overlapping.Therefore, crown 153j only acts on compressive, thus durability can be suppressed to reduce.
Fig. 3 is the figure of the piston body representing the first embodiment, Fig. 3 (a) is birds-eye view, and Fig. 3 (b) is side cut away view, and Fig. 3 (c) is upward view.Plate member 155 is molding by insert and shape all-in-one-piece parts when resin forming piston body 153, by the axis at plate member 155 center, is provided with the knock hole 155c for locating in two places.And, be equally spaced formed with four claw 153g from top wrapper plate parts 155 in a circumferential direction, thus the stripping of confinement plate parts 155 and piston body 153.As shown in Fig. 3 (c), gate location during resin forming piston body 153 is formed at the substantial middle place of bottom 153a1.Namely, gate location during configuration resin forming piston body 153, so that using as the position high to accuracy requirement kept the annular ditch groove 153e of annular seal member 154 or crown as the position flowing into molten resin swimmingly, on the other hand, the position that accuracy requirement is not so high energy chamber side is become away from gate location and is difficult to reach (Hui り Write body) position.In addition, by thicker the wall thickness setting knit line forming portion 153b, even if thus form molten resin than being easier to flow into and molten resin cools the structure being also difficult to formation knit line a little in inflow process.
Piston body 153 be incorporated in have in bottom outlet 31a time, because piston body is cylinder-like part, so can with center shaft OP for centre of gration be rotatably accommodated.Such as, rotational force is produced according to the piston movement etc. flowed into braking liquid or according to the vibration from car body side transmission etc.Now, because valve rod 74 and piston body 153 are Split type structures, even if the center shaft OR of valve rod 74 departs from the center shaft OP of piston body 153 and configures, also can not act on the power carrying out in a rotational direction limiting, therefore, piston body 153 rotates.Now, the valve rod bottom 74c of valve rod 74 is positioned in plate member 155, has the circumferentially moving contact of the radius corresponding with the side-play amount of center shaft OR with center shaft OP.Namely valve rod 74 and plate member 155 are not abut through same position of being everlasting, but piston body 153 suitably rotates, thus change abutted position and abut, therefore, can suppress only in the partial wear of same position wearing and tearing, thus the durability improving plate member 155 can be sought.
Fig. 4 is the sketch of Fabrication procedure when representing the piston body utilizing resin insert-molding first embodiment.In a first embodiment, have form crown side shape the first mould 201, be configured in the first mould 201 and form the second mould 202 of piston body outer peripheral face and the 3rd mould 203, the bottom 153a1 forming piston 153 and cylindrical portion inner circumferential 153a and there is the 4th mould 204 of the inlet 204a injecting molten resin above.
As shown in step 1 of fig. 4, on the first mould 201, being provided with two positions the locating dowel pin 201a inserted in locating dowel pin through hole 201b, by inserting this locating dowel pin 201a in the knock hole 155c of plate member 155, plate member 155 being positioned.In this condition, the second mould and the 3rd mould is made to be close to movement from left and right to central authorities while making the second mould 202 and the 3rd mould 203 be close to the end face of the first mould 201.In this condition, by covering the shape that the 4th mould 204 completes piston body 153 from top.Then, in this condition, flow into molten resin from the inlet 204a set by the 4th mould 204, carry out insert-molding.
If the inflow of molten resin terminates, then in step 2, first make the 4th mould 204 be moved upward, and unload the 4th mould, in step 3, second mould 202 and the 3rd mould 203 are moved left and right, and unload the second mould and the 3rd mould, in step 4, above push away locating dowel pin 201a finally, unload the first mould 201 and piston body 153, thus form piston body 153.
The enlarged cross-sectional view of state when Fig. 5 is the piston body arrival bottom dead point representing the first embodiment.In addition, bottom dead point refers to that piston body physically can not the nadir of movement downwards again.Now, when the size of the axial distance L of piston bearing surface 31a1 and piston area 153h and the outer diameter D P of plate member 155 being compared, DP > L is configured to.Although namely plate member 155 opposing pistons body 153 is by insert-molding, and carries out work integratedly, also can suppose just in case the situation of plate member 155 stripping.At this, suppose to be configured to DP < L, in this case, because plate member 155 can longitudinally erect at bottom dead point, so, if plate member 155 is clipped between the bottom surface of crown and path cylinder portion 31b in this condition, then likely causes piston body 153 can not carry out stroke and move.On the other hand, be configured to DP > L in a first embodiment, so, even if plate member 155 comes off, plate member 155 can not longitudinally erect in this condition, thus the situation that piston body 153 can be avoided effectively can not to carry out stroke movement occurs.In addition, although in a first embodiment the axial distance of piston bearing surface 31a1 and piston area 153h is expressed as L, say in further detail, the distance between crown 153j and the bottom of path cylinder portion 31b is set as that L is also actv..This is because because plate member 155 is discoid, if so plate member 155 erects after peeling off, so initial what abut is exactly the bottom of crown 153j and path cylinder portion 31b.
As mentioned above, the first embodiment can obtain the following action effect enumerated.
(1) brake equipment has: inside is formed with the housing 31 of oil circuit; Be assembled in be formed in housing 31 and with liquid flow path 10a, 10b, the piston body 153 that what 13 (oil circuits) were communicated with have in bottom outlet 31a; To piston body 153 to the coil spring 152 (the first elastomeric element) having the bottom direction of bottom outlet 31a to exert a force; And be configured at the pressure regulating valve 7 of liquid flow path 10a, this pressure regulating valve 7 has ball part 72 (valve body), valve rod 74 and pressure regulating valve retracing spring 73 (the second elastomeric element), described valve rod 74 is configured between the crown 153j of piston body 153 and ball part 72 and the seat portion 71a that ball part 72 is abutted from ball part 72 is separated, the end side of described pressure regulating valve retracing spring 73 to be connected on ball part 72 and to seat portion 71a direction force and there is the elastic force more weak than coil spring 152; Described brake equipment has and utilizes the stroke of piston body 153 when ABS (Anti-lock Braking System) controls and can there being the liquid storage function stockpiling the braking liquid flowed out in the brake wheel cylinder of vehicle in bottom outlet 31a.Utilize resin forming on the crown 153j of piston body 153, to be provided with the quality hard plate parts 155 (duromer) harder than resin while forming piston body 153, via plate member 155, piston body 153 is abutted with valve rod 74.
Therefore, even if when for seeking lightweight and cost degradation and forming resin-made piston body 153, the abrasion test of the relative valve rod 74 of crown 153j also can be improved.
(2) duromer is plate member 155, is shaped in piston body 153.Therefore, plate member 155 can be manufactured when the resin forming of piston body 153 simultaneously, thus can boost productivity.In addition, although plate member 155 is metal in a first embodiment, be not limited to metal, also can suitably select other hard materials.
(3) plate member 155 is discoid, first elastomeric element is coil spring 152, piston body 153 be formed as having bottom 153a1 have bottom tube-like parts, coil spring 152 support foot 153a1, the diameter DP of plate member 155 is greater than the outer diameter D S of coil spring 152.Therefore, crown 153j only acts on compressive, durability can be suppressed to reduce.
(4) the maximum dimension D P of plate member 155 is greater than the range amount L of piston body 153.Therefore, even if plate member 155 is peeled off from piston body 153, also can maintain stable work and not hinder the stroke of piston body 153.
(5) piston body 153 has rotatably been configured in bottom outlet 31a, and valve rod 74 departs from the centre of gration of piston body 153 and configures.Namely valve rod 74 and plate member 155 are not abut through same position of being everlasting, but piston body 153 suitably rotates, thus change abutted position and abut, so can improve the durability of plate member 155.
(6) brake equipment also has: the annular ditch groove 153e being formed at the periphery of piston body 153; Be arranged in annular ditch groove 153e, annular ditch groove 153e and having between bottom outlet 31a inner peripheral surface is sealed, having the annular seal member 154 being divided into hydraulic pressure chamber and energy chamber in bottom outlet 31a.There is knit line forming portion 153b (knit line) in the energy chamber region of piston body 153.Namely piston body 153 is formed in the mode forming knit line in the position so not high to the accuracy requirement relevant to fluid tight grade, in other words, because do not form knit line in the position that accuracy requirement is high, so can boost productivity, and necessary precision can be guaranteed.
[the second embodiment]
Then, the second embodiment is described.Because basic structure is identical with the first embodiment, only difference is described.Fig. 6 is the enlarged cross-sectional view of the liquid reserve tank structure representing the second embodiment.In first embodiment by one-body molded metal plate member with seek improve abrasion test.On the other hand, in a second embodiment, abrasion test is improved by forming metal deposition film to seek on crown.Crown 153k compares the pedestal shape that piston area 153h swells, and by vapor deposition treatment, the surface of this crown 153k covers the vapor-deposited film 153m that abrasion test is strong.Can suitably select the evaporation coating method that such as abrasion test such as titanium nitride or DLC is strong.
As mentioned above, following action effect can be obtained in a second embodiment.
(7) duromer is the vapor-deposited film 153m formed by vapor deposition treatment at the crown 153k of piston body 153.Therefore, can either seek to improve abrasion test, can lightweight be sought again compared with metal plate member.And, even if because this vapor-deposited film peels off the work that also can not hinder piston body 153, so the path increment setting degree of freedom of piston body 153 to bottom dead point can be improved.
[the 3rd embodiment]
Then, the 3rd embodiment is described.Fig. 7 is the sketch of the piston body representing the 3rd embodiment.Although adopt discoid parts as plate member in a first embodiment, in the third embodiment, difference is, have employed the petal-shaped plate member 160 stretched to four directions diametrically.Plate member 160 circumferentially to have in equally spaced mode the clamping part 161 that front end radially extends with attenuating at four positions.And, be provided with the knock hole 160c for locating at two positions.If carry out insert-molding, then cover clamping part 161 by resinous claw 153g1, metal plate sections is circularly exposed and forms valve rod bearing surface 160a.Thus, back side 160b and the crown 153j of plate member 160 are close to, and then are fixed integratedly by claw 153g1.At this, as long as the region required by valve rod bearing surface 160a is as lower area: make the radius distance of knock hole 160c forming position be correspond to center shaft OP and center shaft OR side-play amount length more than region.Therefore, the 3rd embodiment does one's utmost to reduce metallic member for the region beyond this region while guaranteeing this region, thus can seek lightweight.
As mentioned above, the 3rd embodiment can obtain following action effect.
(8) plate member 155 has clamping part 161 (protuberance) in the outer peripheral edges of annular disc, is fixed integratedly by clamping part 161 and piston body.Therefore, lightweight can be sought and can improve abrasion test again.In addition, although be expressed as clamping part 161 as the structure extended from annular disc, but also can change a kind of saying, namely cut away N/R part (recess) from large annular disc to inner circumferential, the part (between recess and recess) that this cutting is left afterwards is clamping part 161.
[the 4th embodiment]
Then, the 4th embodiment is described.Fig. 8 is the enlarged cross-sectional view of the liquid reserve tank structure representing the 4th embodiment.Because basic structure is identical with the first embodiment, so mark same Reference numeral for the part with identical function, different Reference numerals is marked for difference, is described.
The liquid reserve tank 15 of the first embodiment is the structure that the center shaft OR of valve rod 74 and the center shaft OP of piston body 153 depart from.On the other hand, the difference of the 4th embodiment is, the center shaft OR of the valve rod 74 and center shaft OP of piston body 153 configures on the same axis.And in a first embodiment, the top of pressure regulating valve reception hole 31c is connected with liquid flow path 10a.On the other hand, the difference of the 4th embodiment is, has wide diameter portion 31d at the inner peripheral surface of pressure regulating valve reception hole 31c, and this wide diameter portion 31d, is connected with liquid flow path 10a from side relatively.And although in a first embodiment, pressure regulating valve reception hole 31c is connected with liquid flow path 13 and 10b, and in the fourth embodiment, difference is, having in bottom outlet 31a and the direct opening in position be in above annular seal member 154a.In addition, although be only provided with an annular seal member in a first embodiment, in the fourth embodiment, difference is, has upside these two annular seal member of annular seal member 154a and downside annular seal member 154b.Corresponding, the difference of the 4th embodiment is also, peripheral groove also form upside these two annular ditch grooves of annular ditch groove 153e and downside annular ditch groove 153e1.In addition, although in a first embodiment, be formed with airport 151b in the below of fixed parts 151, in the fourth embodiment, difference is, is formed and bends to cylindric cylindrical air hole 151d1, to improve the retention of coil spring 152.
In addition, in a first embodiment, valve rod 74 is formed as point body component with piston body 153.On the other hand, in the fourth embodiment, difference is, valve rod 74 is one-body molded with piston body 153.Specifically, have valve rod retaining hole 155p in the central authorities of plate member 155, after press-in valve rod 74, plate member 155 is integrally formed parts with valve rod 74.Then, after the first mould 201 loads this integrated component, be molding by insert, form piston body 153.Thereby, it is possible to seek to improve assembleability.And by one-body molded, valve rod 74 and plate member 155 always carry out work integratedly, so, do not need to consider abrasion test, can seek to improve durability.
In addition, when forming piston body 153 by resin forming, also can consider with the one-body molded valve rod 74 of resin.But valve rod 74 is elongated parts in the axial direction, forms valve rod 74 with resin and probably can not guarantee enough intensity.On the other hand, insert-molding is carried out on the basis be integrally formed with metal plate member 155 by metal valve rod 74, thus the intensity of valve rod 74 can be guaranteed, and also can guarantee that valve rod 74 does not fall, and thus can seek the durability improved as a whole by plate member 155.
And in the fourth embodiment, the center shaft OR of the valve rod 74 and center shaft OP of piston body 153 configures on the same axis, so if piston body 153 rotates, then valve rod 74 also rotates integratedly thereupon.Because valve rod 74 and plate member 155 are one, so can not partial wear be produced.And, owing to there is rotational force, valve rod 74 does not act on and has toppled over power, therefore the durability of valve rod 74 has not also been affected.
As mentioned above, the 4th embodiment can obtain following action effect.
(9) plate member 155 is one-body molded with valve rod 74, does not therefore need to consider to abut the wearing and tearing produced, and can improve durability.And the 4th embodiment can guarantee the intensity of valve rod 74, and plate member 155 can be utilized to guarantee, and valve rod 74 does not fall, and thus can improve durability as a whole.
At this, Fig. 9 is the enlarged cross-sectional view of the liquid reserve tank structure representing other embodiments.Basic structure is identical with the 4th embodiment.In the fourth embodiment, valve rod 74 and plate member 155 are as a point body component, and by valve rod 74 being pressed into and making the structure that described valve rod 74 is integrated with plate member 155 one-tenth, but also can manufacture and make valve stem 302 and the integrated stem member 300 in plate portion 301 in advance, in the same manner as the 4th embodiment, insert-molding is carried out to this stem member 300, also can obtain same action effect.
Below, enumerate for the technological thought grasped from above-described embodiment.
(10) feature of brake equipment is to have:
Phenolic piston body, it has been arranged in bottom outlet, and this has bottom outlet to be formed at inside and has the housing of oil circuit and be communicated with described oil circuit, when ABS (Anti-lock Braking System) controls, described have in bottom outlet carry out stroke and move;
Plate member, it is arranged on the crown of described piston body, and abrasion test is stronger than described resin;
First elastomeric element, it has the bottom direction of bottom outlet to exert a force to described piston body towards described; And
Pressure regulating valve, it has valve body, valve rod and the second elastomeric element, described valve body is configured on described oil circuit, described valve rod is configured between described plate member and described valve body, the valve seat part that described valve body is abutted from described valve body from, the end side of described second elastomeric element abuts described valve body and direction towards described seat portion exerts a force, and this second elastomeric element has the elastic force more weak than described first elastomeric element.
Therefore, even if when for seeking lightweight and cost degradation and forming resin-made piston body, the abrasion test of the relative valve rod of crown also can be improved.
(11) brake equipment as described in above-mentioned (10), is characterized in that,
Described plate member is one-body molded at described piston body.
Therefore, it is possible to manufacture plate member when the resin forming of piston body, thus can boost productivity simultaneously.
(12) brake equipment as described in above-mentioned (10), is characterized in that,
Described first elastomeric element is coil spring;
Described piston body be have bottom have bottom tube-like parts;
Described coil spring supports described bottom, and the diameter of described plate member is greater than described helical spring external diameter.
Therefore, crown only acts on compressive, durability can be suppressed to reduce.
(13) brake equipment as described in above-mentioned (12), is characterized in that,
Described plate member and described valve-stem integrated shaping.
Therefore, do not need to consider to abut the wearing and tearing produced, can durability be improved.
(14) brake equipment as described in above-mentioned (10), is characterized in that,
The maximum gauge of plate member is formed as the range amount being greater than described piston body.
Therefore, even if plate member is peeled off from piston body, do not hinder the stroke of piston body yet, stable work can be maintained.
(15) brake equipment as described in above-mentioned (10), is characterized in that,
Have in bottom outlet described in described piston body is rotatably configured in;
Described valve rod departs from the centre of gration of described piston and configures.
Namely valve rod and plate member are not abut through same position of being everlasting, and because piston body suitably rotates, thus change abutted position and abut, so can improve the durability of plate member.
(16) brake equipment as described in above-mentioned (10), is characterized in that having:
Annular ditch groove, it is formed at the periphery of described piston body;
Annular seal member, it is arranged in described annular ditch groove, to described annular ditch groove and described have between bottom outlet inner peripheral surface seal, with by described have in bottom outlet be divided into hydraulic pressure chamber and energy chamber,
In the energy chamber region of described piston body, there is knit line.
Namely, piston body is formed, in other words, owing to not forming knit line in the position that accuracy requirement is high in the mode forming knit line in the position so not high to the accuracy requirement relevant to fluid tight grade, thus can boost productivity, and required precision can be guaranteed.
(17) brake equipment, is characterized in that, has:
Phenolic piston body, it has been assembled in bottom outlet, and this has bottom outlet to be positioned at inside to be formed with the housing of oil circuit and to be communicated with described oil circuit;
Metal plate member, it is arranged on the crown of described piston body integratedly;
Coil spring, it has the bottom direction of bottom outlet to exert a force to described piston body towards described; And
Pressure regulating valve, it has valve body, metal valve rod and elastomeric element, described valve body is configured on described oil circuit, described metal valve rod is configured between described plate member and described valve body, the valve seat part that described valve body is abutted from described valve body from, described pressure regulating valve elastomeric element has the elastic force more weak than the applying application force of described first elastomeric element, the end side of this elastomeric element abuts described valve body and direction towards described seat portion exerts a force, make when described pressure regulating valve is configured to not work described valve body from described valve seat part from;
Described brake equipment have to utilize when ABS (Anti-lock Braking System) controls the stroke of described piston body the braking liquid flowed out in the brake wheel cylinder of vehicle can be accumulated in described in have liquid storage function in bottom outlet,
Described piston body be have bottom have bottom tube-like parts, support described bottom by described coil spring, the diameter of described plate member is greater than described helical spring external diameter.
Therefore, even if when for seeking lightweight and cost degradation and forming resin-made piston body, the abrasion test of the relative valve rod of crown also can be improved.And only compressive is acted on crown, durability can be suppressed to reduce.
(18) brake equipment as described in above-mentioned (17), is characterized in that,
Described metal plate member is stainless steel.
Therefore, necessary intensity can either be guaranteed, can corrosion stability be improved again.
(19) brake equipment as described in above-mentioned (18), is characterized in that,
Described plate member is formed discoid, and maximum gauge is formed as the range amount being greater than described piston body.
Therefore, even if plate member is peeled off from piston body, do not hinder the stroke of piston body yet, stable work can be maintained.
(20) brake equipment as described in above-mentioned (19), is characterized in that,
Have in bottom outlet described in described piston body is rotatably configured in;
Described valve rod departs from the centre of gration of described piston body and configures.
Namely valve rod and plate member are not abut through same position of being everlasting, but piston body suitably rotates, thus change abutted position and abut, therefore, it is possible to improve the durability of plate member.
Claims (10)
1. a brake equipment, is characterized in that, has:
Housing, its inside is formed with oil circuit;
Piston body, its be assembled in be formed at described housing and be communicated with described oil circuit have in bottom outlet;
First elastomeric element, it has the bottom direction of bottom outlet to exert a force to described piston body towards described; And
Pressure regulating valve, it is configured on described oil circuit, there is valve body, valve rod and the second elastomeric element, described valve rod is configured between the crown of described piston body and described valve body, the valve seat part that described valve body is abutted from described valve body from, the end side of described second elastomeric element abuts described valve body and direction towards described seat portion exerts a force, and described second elastomeric element has the elastic force more weak than described first elastomeric element;
Described brake equipment has and utilizes the stroke of described piston body can have in bottom outlet described the liquid storage function stockpiling the braking liquid flowed out in the brake wheel cylinder of vehicle when ABS (Anti-lock Braking System) controls,
Form described piston body by resin forming, and on the crown of described piston body, be fixed with the quality duromer harder than described resin, via described duromer, described piston body is abutted with described valve rod.
2. brake equipment as claimed in claim 1, is characterized in that,
Described duromer is plate member, one-body molded at described piston body.
3. brake equipment as claimed in claim 2, is characterized in that,
Described plate member is discoid;
Described first elastomeric element is coil spring;
Described piston body is formed with bottom tube-like, and described coil spring supports the bottom of described piston body, and the diameter of described plate member is greater than described helical spring external diameter.
4. brake equipment as claimed in claim 3, is characterized in that,
The maximum gauge of described plate member is formed as the range amount being greater than described piston body.
5. brake equipment as claimed in claim 4, is characterized in that,
Described piston body has in bottom outlet described in can being configured in rotatably;
Described valve rod departs from the centre of gration of described piston body and configures.
6. brake equipment as claimed in claim 1, is characterized in that having:
Annular ditch groove, it is formed at the periphery of described piston body;
Annular seal member, it is arranged in described annular ditch groove, to described annular ditch groove and described have between bottom outlet inner peripheral surface seal, with by described have in bottom outlet be divided into hydraulic pressure chamber and energy chamber;
In the energy chamber region of described piston body, there is knit line.
7. brake equipment as claimed in claim 2, is characterized in that,
Described duromer is formed in by vapor deposition treatment on the crown of described piston body.
8. brake equipment as claimed in claim 3, is characterized in that,
Described plate member and described valve-stem integrated shaping.
9. brake equipment as claimed in claim 3, is characterized in that,
Described plate member has recess or protuberance in the outer peripheral edges of annular disc, by described protuberance, is fixed integratedly with described piston body.
10. a brake equipment, is characterized in that, has:
Phenolic piston body, it has been arranged in bottom outlet, and this has bottom outlet to be formed at inside and has the housing of oil circuit and be communicated with described oil circuit, when ABS (Anti-lock Braking System) controls, described phenolic piston body described have in bottom outlet carry out stroke and move;
Plate member, it is fixed on the crown of described piston body, and abrasion test is higher than described resin;
First elastomeric element, it has the bottom direction of bottom outlet to exert a force to described piston body towards described; And
Pressure regulating valve, it has valve body, valve rod and the second elastomeric element, described valve body is configured on described oil circuit, described valve rod is configured between described plate member and described valve body, the valve seat part that described valve body is abutted from described valve body from, the end side of described second elastomeric element abuts described valve body and direction towards described seat portion exerts a force, and described second elastomeric element has the elastic force more weak than described first elastomeric element.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP2010-285256 | 2010-12-22 | ||
| JP2010285256A JP5371945B2 (en) | 2010-12-22 | 2010-12-22 | Brake device |
| JP2010-285256 | 2010-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102529923A CN102529923A (en) | 2012-07-04 |
| CN102529923B true CN102529923B (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110434454.6A Expired - Fee Related CN102529923B (en) | 2010-12-22 | 2011-12-22 | Brake equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5371945B2 (en) |
| CN (1) | CN102529923B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5708617B2 (en) | 2012-11-14 | 2015-04-30 | 株式会社デンソー | Pressure regulating reservoir |
| JP6308587B2 (en) * | 2014-04-04 | 2018-04-11 | 日立オートモティブシステムズ株式会社 | Brake device |
| WO2018190115A1 (en) * | 2017-04-14 | 2018-10-18 | 株式会社ブリヂストン | Valve housing, valve, and method for manufacturing valve housing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4202388A1 (en) * | 1992-01-29 | 1993-08-05 | Bosch Gmbh Robert | Vehicular hydraulic antilock braking system with wheel-slip controller - has blocking valve in pump induction line with steel ball and seating opened by impact piston |
| EP1065367A2 (en) * | 1999-06-30 | 2001-01-03 | Caterpillar Inc. | Improved valve seat for a ball and pin valve member in a hydraulically actuated fueal injector |
| US6302498B1 (en) * | 1998-09-07 | 2001-10-16 | Denso Corporation | Pressure-adjusting reservoir for ABS and vehicle brake device using the same |
| JP2002200972A (en) * | 2000-12-28 | 2002-07-16 | Nissin Kogyo Co Ltd | Reservoir |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0437203Y2 (en) * | 1985-07-25 | 1992-09-02 | ||
| JP3259313B2 (en) * | 1992-02-28 | 2002-02-25 | アイシン精機株式会社 | Lever structure for load response type brake fluid pressure control device |
| JPH0781539A (en) * | 1993-07-22 | 1995-03-28 | Nissan Motor Co Ltd | Antiskid device |
| JPH0893916A (en) * | 1994-09-22 | 1996-04-12 | Aisin Seiki Co Ltd | Resin made piston for disk brake |
| JPH08310369A (en) * | 1995-05-17 | 1996-11-26 | Toyota Motor Corp | Fluid pressure controller |
| JPH1086815A (en) * | 1996-09-18 | 1998-04-07 | Unisia Jecs Corp | Reservoir |
| JP2006151362A (en) * | 2004-11-04 | 2006-06-15 | Advics:Kk | Pressure adjustment reservoir and vehicle brake device using it |
| JP5304446B2 (en) * | 2008-08-28 | 2013-10-02 | 株式会社アドヴィックス | Pressure regulating reservoir |
-
2010
- 2010-12-22 JP JP2010285256A patent/JP5371945B2/en not_active Expired - Fee Related
-
2011
- 2011-12-22 CN CN201110434454.6A patent/CN102529923B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4202388A1 (en) * | 1992-01-29 | 1993-08-05 | Bosch Gmbh Robert | Vehicular hydraulic antilock braking system with wheel-slip controller - has blocking valve in pump induction line with steel ball and seating opened by impact piston |
| US6302498B1 (en) * | 1998-09-07 | 2001-10-16 | Denso Corporation | Pressure-adjusting reservoir for ABS and vehicle brake device using the same |
| EP1065367A2 (en) * | 1999-06-30 | 2001-01-03 | Caterpillar Inc. | Improved valve seat for a ball and pin valve member in a hydraulically actuated fueal injector |
| JP2002200972A (en) * | 2000-12-28 | 2002-07-16 | Nissin Kogyo Co Ltd | Reservoir |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102529923A (en) | 2012-07-04 |
| JP2012131378A (en) | 2012-07-12 |
| JP5371945B2 (en) | 2013-12-18 |
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