CN208687015U - A kind of automatic prioritizing valve - Google Patents

Abstract

The utility model discloses a kind of automatic prioritizing valves, are related to automatic transmission shift valve field.It includes valve body, spool, spring, working connection and throttle orifice；It is provided with valve chamber in the valve body, movable spool is provided in valve chamber；Valve chamber includes valve body major diameter chamber and valve body path chamber, and valve body path chamber upper and lower side is respectively arranged with first, third selection valve chamber, is provided with the second selection valve chamber between first, third selection valve chamber；It is provided with spool chamber in spool, is provided with spring in spool chamber；The first, second selection valve chamber is connected to working connection, and third selects valve chamber and the second oil circuit outlet.The purpose of this utility model is to unify fuel feeding using working connection and flow to successively control to oil circuit by automatic prioritizing valve, guarantee that fuel feeding will not be exported to the second oil circuit immediately after the main oil of shift enters shift valve, and be in the low oil pressure stage and automatically control working condition, avoid operating mechanism from failing or damage.

Description

A kind of automatic prioritizing valve

Technical field

The utility model relates to automatic transmission shift valve fields, more particularly, to a kind of automatic prioritizing valve.

Background technique

Hydraulic technique plays the great function that can not be substituted in modern project machinery field.Since hydraulic technique has power Weight ratio is big, the flexible big, power transmission of configuration and it is easy to control the features such as, thus be widely applied by all kinds of engineering machinery.For Engineering machinery or the hydraulic system of more executing agencies have preferential actuating mechanism to guarantee that machine security reliably works.

In automatic transmission shift valve field, more gear hydraulic automatic speed variator shifting systems, successive movement need to be controlled Mechanism generally use the independent fuel feeding of different oil pumps or individual control system, that there are spill losses is larger for it, in engine Operating mechanism's operating efficiency due to single oil pump feed is insufficient is low and the problems such as structure is more complex when low speed.

Utility model content

The purpose of this utility model is to unify fuel feeding using working connection and flowed to first by automatic prioritizing valve to oil circuit After control, guarantee shift it is main oil enter shift valve after will not immediately to the second oil circuit export fuel feeding, the second oil circuit outlet include supply The other transmission brakes of oil and clutch, and be in the low oil pressure stage and automatically control working condition, avoid operating mechanism from failing Or damage, to improve mechanism efficiency in simple structure.

In order to achieve the above object, the utility model provides following technical solution: a kind of automatic prioritizing valve, it includes Valve body, spool, spring, working connection；Valve chamber is provided in the valve body, valve chamber includes the valve body major diameter chamber of upper end and the valve of lower end Body path chamber；Valve body path chamber upper and lower side is respectively arranged with first choice valve chamber, third selection valve chamber, first choice valve chamber and the The second selection valve chamber is provided between three selection valve chambers；The spool includes the major diameter section of upper end and the path section of lower end, major diameter section, It is intracavitary that path section is movably arranged on valve body major diameter chamber, valve body path respectively；It is provided with spool chamber in spool, is provided in spool chamber Spring；Spring one end setting is arranged in body top, the other end in spool chamber bottom surface；The first choice valve chamber, the second selection Valve chamber is connected to working connection；Third selects valve chamber and the second oil circuit outlet；Spool major diameter section bottom surface and first choice valve Bottom of chamber face gap setting.

Further, shift valve working connection and first choice valve chamber junction are provided with throttle orifice.

Further, the spool major diameter chamber of upper end and the spool path chamber of lower end are provided in spool；Spring includes interior bullet Spring and outer spring, inner spring are arranged in outer spring, and inner spring and outer spring are installed independently of each other, and when work is non-interference；It is interior One end of spring and outer spring is all disposed within body top, and the inner spring other end is arranged in spool path bottom of chamber portion, and outer spring is another One end is arranged in spool major diameter bottom of chamber portion.

Further, spool lower end is provided with spool boss.

The utility model has the beneficial effects that

1, the utility model unifies the design of fuel feeding in more gear hydraulic automatic speed variator shifting systems using working connection, It is relatively existing to have simple and compact for structure, operational efficiency using the different independent fuel feeding of oil pump or individual Control System Design High, the advantages that control characteristic is good, reliable operation, design need to use the different independent fuel feeding of oil pump or list before very good solution The problem that operating efficiency is low caused by only control system and structure is more complex.

2, the utility model is provided with throttle orifice in working connection and first choice valve chamber junction, and the main oil of control is facilitated to enter The oil mass of first choice valve chamber reaches the control to move up and down to spool, while guaranteeing that main oil cannot be introduced into the low oil pressure stage Shifting system is avoided in low oil pressure stage work mechanism actual effect or damage.

3, the utility model is provided with spring in spool major diameter chamber and path chamber, is arranged relative to single spring, interior The setting of outer two spring can more steadily when move spool in valve chamber, and when work is relatively reliable, improves the operation longevity of spool Life, has also correspondinglyd increase the service life of entire mechanism.

Detailed description of the invention

Fig. 1 is the utility model specific embodiment initial state cross-sectional view.

Fig. 2 is the utility model specific embodiment cross-sectional operational views.

Fig. 3 is the utility model specific embodiment valve body cross-sectional view.

Fig. 4 is the utility model specific embodiment spool cross-sectional view.

In figure: 1, valve body；2, spool；3, spring；4, working connection；5, throttle orifice；101, first choice valve chamber；102, second Select valve chamber；103, third selects valve chamber；104, the second oil circuit exports；105, valve chamber；106, valve body major diameter chamber；107, valve body is small Diameter chamber；21, spool chamber；201, major diameter section；202, path section；203, spool boss；211, spool major diameter chamber；212, spool path Chamber；301, inner spring；302, outer spring；401, working connection entrance；402, the first oil circuit exports.

Specific embodiment

In order to enable those skilled in the art to better understand the technical solutions of the present invention, with reference to the accompanying drawing to this reality Be described in detail with novel, the description of this part be only it is exemplary and explanatory, should not be to the protection scope of the utility model There is any restriction effect.

As Figure 1-Figure 4, the specific structure of the utility model are as follows: a kind of automatic prioritizing valve, it include valve body 1, Spool 2, spring 3, working connection 4；Valve chamber 105 is provided in the valve body 1, valve chamber 105 includes 106 He of valve body major diameter chamber of upper end The valve body path chamber 107 of lower end；107 upper and lower side of valve body path chamber is respectively arranged with first choice valve chamber 101, third selection valve chamber 103, the second selection valve chamber 102 is provided between first choice valve chamber 101 and third selection valve chamber 103；The spool 2 includes upper end Major diameter section 201 and lower end path section 202, major diameter section 201, path section 202 be movably arranged on respectively valve body major diameter chamber 106, In valve body path chamber 107；It is provided with spool chamber 21 in spool 2, spring 3 is provided in spool chamber 21；3 one end of spring is arranged in valve 1 top of body, the other end are arranged in 21 bottom surface of spool chamber；The first choice valve chamber 101, second select valve chamber 102 with main oil Road 4 is connected to；Third selects valve chamber 103 to be connected to the second oil circuit outlet 104；201 bottom surface of major diameter section and 101 bottom of first choice valve chamber Face gap setting.

In order to more preferably control the flow velocity that main oil enters first choice valve chamber 101, shift valve working connection 4 and first choice valve chamber 101 junctions are provided with throttle orifice 5.

In order to which better balance valve core 2 pumps in valve chamber 105, the spool that upper end is provided in spool 2 is big The spool path chamber 212 of diameter chamber 211 and lower end；The spring 3 includes inner spring 301 and outer spring 302, and inner spring 301 is arranged In outer spring 302, and it is non-interference；One end of inner spring 301 and outer spring 302 is all disposed within 1 top of valve body, inner spring The setting of 301 other ends is arranged in 212 bottom of spool path chamber, 302 other end of outer spring in 211 bottom of spool major diameter chamber.

In order to reduce 105 bottom surface contact-impact of spool 2 and valve chamber, spool boss 203 is arranged in 2 lower end of spool.

The utility model concrete operating principle:

Initial state: before engine start, this automatic 2 upper end of prioritizing valve spool passes through inner spring 301 and outer spring 302 spring force contacts 2 lower end spool boss 203 of spool with 105 bottom surface of valve chamber.

Working condition: after engine start, working connection entrance 401 begins with main oil and enters, and spool 2 is due to inner spring 301 The second selection valve chamber 102, third selection valve chamber 103 are connected to not with the spring force of outer spring 302；To make main oil through the first oil Way outlet 402 preferentially reaches at the solenoid valve of shift valve core upper end, pushes shift valve core movement, moves down it and is maintained at empty Gear is set.

Meanwhile the main oil of working connection 4 reaches the second selection valve chamber 102 through oil circuit and first quarter discharge orifice 5 reaches first choice Valve chamber 101；When reaching a certain amount of into the main oil mass of first choice valve chamber 101, oil pressure starts to act on 201 bottom surface of major diameter section, When the main oily oil pressure for reaching first choice valve chamber 101 by throttle orifice 5 is enough to overcome the spring force of 301 outer spring 302 of inner spring When, spool 2 constantly moves upwards, and until the second selection valve chamber 102 is connected to third selection valve chamber 103, main oil is selected from second Valve chamber 102 reaches third and selects valve chamber 103, then exports 104 fuel feeding to other transmission brakes and clutch through the second oil circuit. At this point, main oil oil pressure acts on 2 bottom surface of spool and 201 bottom surface of major diameter section and moves down spool 2 not；When main oily oil pressure drops to When lower than the spring force of inner spring 301 and outer spring 302, spool 2 is constantly moved downward, until spool boss 203 and valve chamber 105 Bottom surface contact stops.

The up and down motion for passing through spool 2 in this way guarantees to go out to the second oil circuit immediately after the main oil of shift enters shift valve Mouthful 104 fuel feeding, and also cannot be introduced into shifting system in low oil pressure stage main oil, avoid in low oil pressure stage work mechanism actual effect or Damage, to improve mechanism efficiency in simple structure.

It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic Element.

Specific case used herein is expounded the principles of the present invention and embodiment, above example Illustrate the method and its core concept for being merely used to help understand the utility model.The above is only the preferred of the utility model Embodiment, it is noted that due to the finiteness of literal expression, and objectively there is unlimited specific structure, for this technology For the those of ordinary skill in field, without departing from the principle of this utility model, several improvement, retouching can also be made Or variation, above-mentioned technical characteristic can also be combined in the right way；These improve retouching, variation or combination, or not It is improved that the conception and technical scheme of utility model are directly applied into other occasions, it is regarded as the protection of the utility model Range.

Claims (4)

1. a kind of automatic prioritizing valve, it includes valve body (1), spool (2), spring (3) and working connection (4)；It is characterized in that, Is provided with valve chamber (105) in the valve body (1), valve chamber (105) include upper end valve body major diameter chamber (106) and lower end valve body it is small Diameter chamber (107)；Valve body path chamber (107) upper and lower end is respectively arranged with first choice valve chamber (101), third selection valve chamber (103), the second selection valve chamber (102) is provided between first choice valve chamber (101) and third selection valve chamber (103)；The spool (2) include upper end major diameter section (201) and lower end path section (202), activity is set respectively for major diameter section (201), path section (202) It sets in valve body major diameter chamber (106), valve body path chamber (107)；It is provided with spool chamber (21) in spool (2), in spool chamber (21) It is provided with spring (3)；At the top of valve body (1), the other end is arranged in spool chamber (21) bottom surface the setting of spring (3) one end；Described One selection valve chamber (101), the second selection valve chamber (102) are connected to working connection (4)；Third selects valve chamber (103) and the second oil Way outlet (104) connection；Major diameter section (201) bottom surface and first choice valve chamber (101) bottom surface gap setting.

2. a kind of automatic prioritizing valve according to claim 1, which is characterized in that the working connection (4) and the first choosing It selects valve chamber (101) junction and is provided with throttle orifice (5).

3. a kind of automatic prioritizing valve according to claim 1, which is characterized in that be provided in the spool (2) The spool major diameter chamber (211) at end and the spool path chamber (212) of lower end；The spring (3) includes inner spring (301) and outer spring (302), inner spring (301) is arranged in outer spring (302), and non-interference；The one of inner spring (301) and outer spring (302) End is all disposed at the top of valve body (1), and inner spring (301) other end is arranged in spool path chamber (212) bottom, outer spring (302) The other end is arranged in spool major diameter chamber (211) bottom.

4. a kind of automatic prioritizing valve according to claim 1, which is characterized in that spool (2) lower end is provided with Spool boss (203).