CN1149023A

CN1149023A - Load sensing proportioning valve

Info

Publication number: CN1149023A
Application number: CN 96111500
Authority: CN
Inventors: 吉田宽; 林英巳
Original assignee: Jidosha Kiki Co Ltd
Current assignee: Bosch Corp
Priority date: 1995-08-30
Filing date: 1996-08-23
Publication date: 1997-05-07
Anticipated expiration: 2016-08-23
Also published as: CN1090576C; JPH0958435A

Abstract

The invention provides a load perceptual proportional valve that can process a valve body only from one side and can also be equipped with a built-in member only from one side so as to reduce costs. A step hole is formed in a mounting hole only at one side of the valve body, the mounting hole is provided with a valve seat hole which is opened and closed by a hydraulic governing valve body, a seat member arranged in the step hole, a bush which is disposed more close to the mounting hole than the seat member and is matched with the periphery of a slide valve as well as a blockage assembled in the mounting hole, and a spring, the hydraulic governing valve body, the seat member, the bush and the slide valve are arranged in the valve body by the mounting hole and are prevented from unhitching by screwing the blockage in the mounting hole.

Description

Load sensing proportioning valve

What the present invention relates to is a kind of load sensing proportioning valve, under situations such as empty wagons, come the excessive of perception rear-wheel braking force by rear-mounted amount of deflection, and will supply with the trailing wheel oil cylinder corresponding to the fluid pressure of rear wheel load, by suitable distribution to the front and back wheel braking force, prevent the too early deadlock phenomenon of trailing wheel, keep the directional balance of glancing impact with this.

As existing load sensing proportioning valve, the structure that is illustrated on Fig. 5 and Fig. 6 is arranged.This load sensing proportioning valve is provided with bypass path 1b between the input hole 1a of valve body 1 and delivery orifice 1c, both sides have assembly hole 2,3.In the valve chamber S of valve body 1, be placed with ball-type hydraulic efficiency governing valve body 6, it is pushed in valve opening position with guiding valve 4, and apply spring force in closing the valve direction with spring 5.This hydraulic efficiency governing valve body 6 is regulated usefulness to brake fluid pressure, normally by the spring force of spring 11 grades its valve seat orifice 7a from seat member 7 is pushed open and the state that becomes out.

Above-mentioned each member of placing in the valve body 1 prevents its disengagement by be screwed into

obstruction

9,10 respectively in the

assembly hole

2,3 of valve body 1 both sides.Bypass path 1b uses under the situation of load sensing proportioning valve at truck, corresponding to the more liquid measure of needs, for what the increasing of stream volume was provided with, and does not need under the situation of small passenger car.

Valve body 1 is fixed on the chassis (not shown) by bolt 12a and nut 12b, from covering obstruction 10 on one side and installing cover 13.End at cover 13 is installed with carriage 14, on this carriage 14 pin 15 is arranged, and rotatably support the base portion of load perception bar 16.Contain the spacer 17, the spring that together constitute load perception mechanism with load perception bar 16 in cover 13 inside and bearing member 18, loading spring 19.And bear the head that hauls pull pin 20 on the member 18 at spring.The external screw thread 20a that the top had in pull pin 20 protrudes in the dust boot 21.

Load perception bar 16 has 16a of stock portion and the 16b of quarter butt portion that is mutually predetermined angular, and the front end of the 16a of stock portion can be linked on the attaching parts 22 with changeing, and attaching parts 22 is fixed on the figure of vehicle on the unshowned back axle lateral bracket.And connecting the outer screw section 20a of pull pin 20 by transom 23 on the top of quarter butt portion.

In existing load sensing proportioning valve, formed location division 25 on the valve body 1, the location division positions guiding valve 4 thus, is boundary with the minimum aperture portion of location division 25, must the both sides of valve body 1 be processed respectively.In addition, on this valve, when on-board components is put into valve body 1, must serve as that boundary is assembled respectively from both sides also with minimum aperture portion.Thereby treating cost increases with the assembling expense, and cost increases, and this is its shortcoming.

The present invention promptly is because above-mentioned shortcoming, and its purpose is to provide a kind of load sensing proportioning valve, can process valve body from a side, and its on-board components can assemble from a side, to lower its treating cost and assembling expense.

For achieving the above object, the load sensing proportioning valve of the present invention that scheme 1 is recorded and narrated comprises: the valve body that has the bypass path between input hole and delivery orifice; Insert the hydraulic efficiency governing valve body of this valve body, adjusting brake fluid pressure; Can give the spring of spring force and the guiding valve of the direction of pressing to out in the direction of closing to this hydraulic efficiency governing valve body, it is characterized in that: on aforementioned valve body, only formed stepped hole in the assembly hole the inside of a side, be provided with the seat member that has the valve seat orifice that opens and closes by the enforcement of aforementioned hydraulic regulation valve body and be disposed at aforementioned stepped hole, and the obstruction that is fitted to aforementioned assembly hole, after packing into aforementioned spring, hydraulic efficiency governing valve body, seat member and guiding valve in the aforementioned valve body by aforementioned assembly hole, prevent its disengagement by the aforementioned obstruction that is embedded in this assembly hole.

The load sensing proportioning valve of being recorded and narrated by scheme 2 of the present invention has such feature, promptly in the load sensing proportioning valve that scheme 1 is recorded and narrated, be provided with sleeve, the aforementioned seat of the ratio of this ferrule configuration in aforementioned valve body member is also near the position of assembly hole and be embedded in the periphery of aforementioned guiding valve, after this sleeve was also packed in the aforementioned valve body by aforementioned assembly hole, the aforementioned obstruction of being gone into this assembly hole by setting-in prevented its disengagement.

The present invention has following effect

In the invention that scheme 1 is recorded and narrated, only in the assembly hole that a side of valve body has, formed stepped hole; Be provided with and have the valve seat orifice that implement to open and close by the hydraulic efficiency governing valve body and be disposed at seat member in the stepped hole and the obstruction of the assembly hole of packing into; After packing into spring, hydraulic efficiency governing valve body, seat member and guiding valve in the valve body by assembly hole, the obstruction of being advanced assembly hole by setting-in prevents its disengagement.Therefore, can only process valve body from the assembly hole that is present in a side; And on-board components also can only be assembled into from the assembly hole that is present in a side.Because like this, treating cost can reduce significantly with the assembling expense.

In the invention that scheme 2 is recorded and narrated, owing in valve body, be provided with and be disposed at than the more close assembly hole of seat member and be embedded in the sleeve of guiding valve periphery, this sleeve is also packed into by assembly hole, and the back prevents its disengagement by the obstruction pushing that is flush-mounted in this assembly hole in the valve body, can not throw off so can further guarantee a member.

The drawing summary

What Fig. 1 had been to use that the load of the load sensing proportioning valve of the present invention the 1st embodiment should move brake liquid-pressure control device wants portion's skiagraph; Fig. 2 is the part enlarged drawing of Fig. 1; Fig. 3 is the skiagraph of main portion of the load sensing proportioning valve of the present invention the 2nd embodiment; Fig. 4 is the skiagraph of main portion of the load sensing proportioning valve of the present invention the 3rd embodiment; Fig. 5 has been to use the load of existing load sensing proportioning valve should move the skiagraph of brake liquid-pressure control device main portion; Fig. 6 is the part enlarged drawing of Fig. 5.

Embodiment (preferred embodiment detailed description)

About embodiments of the invention, be example to be applicable to that the load with load perception mechanism same as shown in Figure 5 should be moved the situation of brake liquid-pressure control device, described in detail with reference to accompanying drawing.Fig. 1 is that the present invention the 1st embodiment has used the load of load sensing proportioning valve should move the skiagraph of the main portion of brake liquid-pressure control device, and Fig. 2 is the part enlarged drawing of Fig. 1, and adopts prosign with existing mechanism same section.

This load sensing proportioning valve has formed stepped hole 1e in the inside of the assembly hole 3 that only has in a side of valve body 1, and has according to guiding valve 4 it to the direction pushing of opening, and gives ball-type hydraulic efficiency governing valve body 6 to the spring force that closes direction by spring 5.This valve, by only assembly hole 3 that a side has with the spring in the valve chamber S 5 and hydraulic efficiency governing valve body 6, be disposed at after seat member 7, sleeve 8 and guiding valve 4 in the stepped hole 1e be assembled in the valve body 1, prevent to come off by the obstruction 10 that is screwed into assembly hole 3.

Valve body 1 as shown in Figure 2, from the inside of assembly hole 3 successively with being formed centrally the end that connects bypass path 1b, the small diameter bore 1d that forms valve chamber S, the middle diameter stepped hole 1e that is connected with this small diameter bore 1d, and large diameter hole 1f.In addition, on valve body 1, the direction that edge and guiding valve 4 are vertical is provided with the input hole 1a that large diameter hole 1f and the interface of assembly hole 3 are separated, and crisscross along with guiding valve 4, is provided with the delivery orifice 1c of the midway location that is positioned at large diameter hole 1f.

Guiding valve 4 has the thin footpath pushing portion 31 that is used to push hydraulic efficiency governing valve body 6 and is right after flange 32 thereafter, that be positioned at sleeve 8, middle diameter portion 33, and large-diameter portion 34 is by the pars intermedia 35 and the rearward end 36 of rear end.The ratio pars intermedia 35 that the diameter dimension of large-diameter portion 34 is set is also big.Pars intermedia 35 is to pass to stop up 10, and a part is inserted in the sleeve 8, and diameter portion 33 is also big in the ratio of its diameter dimension setting.

In addition, guiding valve 4 is sealed respectively by the sealing 41,42 of middle diameter portion 33 with the periphery configuration of pars intermedia 35.And, in guiding valve 4, the top end face of the thin footpath of 6 pairs of hydraulic efficiency governing valve bodies contact pushing portion 31, by the spring force of cone shaped spring 11 by thin footpath pushing portion 31 with hydraulic efficiency governing valve body 6 to the direction pushing of opening.Cone shaped spring 11 is disposed in the recess 10a of obstruction 10, on one end and the spring-loaded step surface 35a.

Hydraulic efficiency governing valve body 6 is in valve chamber S, and valve chamber S is surrounded by the small diameter bore 1d and the stepped hole 1e of seat member 7 through valve body 1, hydraulic efficiency governing valve body 6 is by the top of 5 pushings of the spring in this valve chamber S to guiding valve 4, apply spring force to the direction of closing, normally the state that is placed on out by the spring force that stops up the spring 11 in 10 the recess 10a.

Seat member 7 one have seat body 50 and insert concentric minor diameter 51 in the sleeve 8, and have clearance hole 51a on the perisporium of the midway location of minor diameter 51.In addition, seat member 7 has the center channel 7b of the thin footpath pushing portion 31 of conical valve seat hole 7a that forms and the break-through guiding valve 4 that is connected this valve seat orifice 7a on seat body 50 parts facing to hydraulic efficiency governing valve body 6 one sides.Make on the end face facing to the minor diameter 51 of the end face of tapered flanges 32 and decide the 51b of journey portion.

Seat member 7 by the annular seal member 52 of the periphery setting of seat body 50 at the state scarf that seals in stepped hole 1e, the end face 50a of seat body 50 is to the step surface of contact stepped hole 1e, and the top end face of sleeve 8 is to the step surface 50b of contact base body 50, by deciding the location that the 51b of journey portion drives the guiding valve 4 of valve state.

One has the large-diameter portion 61 that is matched with large diameter hole 1f than the little minor diameter 60 of the diameter of the large diameter hole 1f of valve body 1 and outer peripheral face on the sleeve 8.In addition, offer the middle diametric hole 8a that the minor diameter 51 of a member 7 is inserted on the sleeve 8 with one heart, be right after the small diameter bore 8b of this small diameter bore and guiding valve 4 bearing fits, and the large diameter hole 8c that is right after with it.On the perisporium of the middle diametric hole 8a of minor diameter 60 part and the large diameter hole 8c part of large-diameter portion 61, offer through hole 60a, 61a.

Sleeve 8,62 one-tenth sealing states of annular seal member by the periphery that is arranged at its large-diameter portion 61 embed in the large diameter hole 1f of valve body 1, top end face 60b is to the step surface 50b of contact base member 7, and the inner end surface of obstruction 10 docks end face 61b after touch, is being pushed by obstruction 10 to prevent to come off.

Stop up and to be integrally formed with the pushing portion 67 that does not establish external screw thread on screw thread joint portion 66 that its periphery has an external screw thread 66a and the periphery on 10.And when stopping up 10 screw-in assembly holes 3, the inner end surface of pushing portion 67 is pushing the aft end face 61b of sleeve 8, and the annular seal member of adorning with pushing portion 67 peripheries 68 seals this part.

The action of now just having used the load of the load sensing proportioning valve of the foregoing description should move brake liquid-pressure control device is illustrated.Supply with the pressure of braking from the braking master cylinder (not shown on the figure) that is connected in input hole 1a to input pressure chamber SI one, promptly pressure is defeated by not shown trailing wheel brake cylinder by bypass path 1b, valve chamber S, valve chamber seat 7a and delivery pressure chamber S0.Simultaneously, will press S1 identical pressure in chamber to be defeated by the front wheel brake oil cylinder with input by the pipeline of other system.

When the pressure feed input pressure chamber S1 that brakes, based on the compression face product moment between pars intermedia 35 and the large-diameter portion 34, the spring force that guiding valve 4 overcomes loading spring 19 moves to closing the pushing of valve direction, up to by hydraulic efficiency governing valve body 6 with valve seat orifice 7a obturation, be provided with the pressure identical to the trailing wheel brake cylinder with the front wheel brake oil cylinder.

; when the pressure of input pressure chamber SI rises to a certain degree; hydraulic efficiency governing valve body 6 in off position; then the pressure of input pressure chamber SI rises; guiding valve 4 moves to valve opening position, by the effect of hydraulic efficiency governing valve body 6, guiding valve 4 to valve seat orifice 7a open, closing direction moves; like this, guiding valve 4 corresponding pressure reduction move and move to valve opening position to closing the valve direction.Its result, input is pressed the pressure of chamber S1 to reduce pressure to scale and is imported delivery pressure chamber S0.

On the other hand, when unloaded, the distance of chassis and back axle side increases, thereby load perception bar 16 has big angular transposition, and on the contrary, along with the accumulation load becomes big gradually, owing to the distance of chassis and back axle reduces, the angular transposition of load perception bar 16 diminishes.Even it is big that the angular transposition of load perception bar 16 becomes, also just dwindle, and transmit pull pin 20 by the short 16b of portion of load perception bar 16 and the lever ratio displacement of the 16a of length portion.

Acting on and the proportional drag load of this displacement in pull pin 20, because this load acts on the direction of the spring force that overcomes loading spring 19 by spring load member 18, the power of bulkhead 17 pushing guiding valves 4 equals to deduct the pulling force that acts on pull pin 20 by the spring force of loading spring 19.

If adopt the 1st above-mentioned embodiment, can only process from the side that assembly hole 3 is arranged valve body 1, interior dress member only can be assembled from side insertion; Can reduce processing charges and assembly expenses like this, but the figure cost-cutting.

Fig. 3 be the present invention's the 2nd embodiment load sensing proportioning valve want portion's skiagraph.In this valve, seat member 7 among the 1st embodiment is become seat and sleeve dual-purpose member 78 with sleeve 8 integrators, like this, can reduce necessary part number, offer through hole 78a at its perisporium, can scheme further to reduce cost.Other aspects are identical with the occasion of the 1st embodiment, and cooresponding main portion gives identical symbol, thereby omitted the repeat specification to these parts.

Fig. 4 is the main portion skiagraph of the load sensing proportioning valve of the present invention the 3rd embodiment.In this valve, saved aforementioned sleeve 8, in seat member 7 pressure stepped hole 1e, be screwed into stopper bolt 46 among the tapped bore 1g that on the perisporium of valve body 1, offers simultaneously, for caution's sake, pushing seat member 7 on the top of this stopper bolt 46 and preventing that it from coming off.

In addition, guiding valve 4 is snug fit in the cylinder 1h that links to each other with the stepped hole 1e of valve body 1.So just save sleeve 8, can scheme to reduce cost.Other aspects are because identical with the 1st embodiment occasion, and cooresponding main portion gives same-sign, thereby has omitted the repeat specification to this part.

And the present invention is not also limit by the foregoing description, can do all distortion in the scope that does not break away from its main idea.

Claims

1. load sensing proportioning valve, it comprises: the valve body that has the bypass path between input hole and delivery orifice; Place the hydraulic efficiency governing valve body that this valve body is interior, regulate brake fluid pressure; Give the spring and the guiding valve that pushes to the direction of opening of this hydraulic efficiency governing valve body spring force toward the direction of closing, it is characterized in that: only the inside of the assembly hole of one side existence has formed stepped hole on aforementioned valve body, be provided with and have the valve seat orifice that implement to open and close by the aforementioned hydraulic regulation valve body and be disposed at the seat member in the aforementioned stepped hole and be flush-mounted in obstruction in the aforementioned assembly hole, by aforementioned assembly hole aforementioned spring, hydraulic efficiency governing valve body, seat member and guiding valve are assembled into after the aforementioned valve body, the aforementioned obstruction of being gone into this assembly hole by setting-in prevents its disengagement.

2. the load sensing proportioning valve of recording and narrating by claim 1, it is characterized in that, in aforementioned valve body, in position, be provided with the sleeve of the periphery that is embedded in aforementioned guiding valve than the more close aforementioned assembly hole of aforementioned seat member, after this sleeve also is assembled in the valve body by aforementioned assembly hole, prevent its disengagement by the aforementioned obstruction pushing that is flush-mounted in this assembly hole.