CN207598942U - Anti- spool clamping stagnation air valve structure - Google Patents

Abstract

The utility model is related to transmission operation system regions, more particularly to a kind of anti-spool clamping stagnation air valve structure, including spool, valve body and the valve deck positioned at body top, first chamber is equipped in valve body, the second chamber connected with first chamber is equipped in valve deck, one end of spool is located in first chamber, and the other end of spool is located in second chamber；First chamber includes positioning chamber and the annular seal space below positioning chamber, and the diameter of positioning chamber is more than the diameter of second chamber, and the diameter of positioning chamber is more than the diameter of annular seal space；The positioning sleeve for being used to support valve deck is equipped in positioning chamber, the sealing ring being located at below positioning sleeve and the hollow spacer for being used to support sealing ring are equipped in annular seal space；Positioning sleeve, sealing ring and spacer are set on the outside of spool, and spacer is equipped with that sealing ring is prevented to be caught in the cushion space between spool and spacer.The technical program can effectively prevent spool clamping stagnation and seal failure, improve use reliability and the service life of air valve.

Description

Anti- spool clamping stagnation air valve structure

Technical field

The utility model is related to transmission operation system regions, and in particular to a kind of anti-spool clamping stagnation air valve structure.

Background technology

Air valve is installed in vehicle gear box, fills exhaust, and provide power for control working cylinder.

As shown in Figure 1, including valve body 5, valve deck 2 and mandril 1, mandril 1 is located in valve deck 2 existing air valve, is set in valve body 5 There is spool 6, spool 6 is located at the lower section of mandril 1, and one end of spool 6 is extended in valve deck 2；It is equipped between valve deck 2 and spool 6 First chamber 3, is equipped with second chamber 4 between valve body 5 and spool 6, first chamber 3 is connected with second chamber 4；Valve body 5 and valve deck 2 Intersection be equipped with for the hollow positioning sleeve 7 of guiding, the longitudinal section of positioning sleeve 7 is inverted L-type shape, including being located at the Lateral part in one chamber 3 and the vertical section in second chamber 4；The inside of lateral part offsets with spool 6, top It is used to support that valve deck 2, outside and valve deck 2 offset, bottom is supported on the top of valve body 5；The inside of vertical section and 6 phase of spool It supports, outside and valve body 5 offset；Be additionally provided in second chamber 4 positioned at the lower section of positioning sleeve 7 O-ring seals 8 and be used to support O shapes The hollow spacer 9 of sealing ring 8, the material of spacer 9 are mostly made by elastic material, such as rubber, and are protected between spacer 9 and spool 6 There are a bit of gaps.

In use, there are following defects for air valve of the prior art：1st, in actual use, valve deck 2 is often By unidirectional eccentric force, and pass through existing 7 structure spool of positioning sleeve, 6 positioning and guiding part also by this eccentric force Effect, inner spool 6 is caused to move, causes 6 clamping stagnation of spool, reduces use reliability and the service life of air valve, especially should When for medium-sized, heavy type commercial vehicle, 6 clamping stagnation risk bigger of spool.2nd, the medial surface of spacer 9 and top are plane Structure design, during actual use, O-ring seals 8 are easy to stress and squeeze the top of spacer 9 and be extruded into spacer 9 and valve Gap between core 6 causes the sealing function of O-ring seals 8 to fail, reduces use reliability and the service life of air valve.

Utility model content

The purpose of this utility model is to provide a kind of anti-spool clamping stagnation air valve structure, spool clamping stagnation and close can effectively prevent Envelope failure improves use reliability and the service life of air valve.

In order to achieve the above objectives, the base case of the utility model is as follows：Anti- spool clamping stagnation air valve structure, including spool, Valve body and the valve deck positioned at body top, valve body is interior to be equipped with first chamber, and the second chamber connected with first chamber is equipped in valve deck Room, one end of spool are located in first chamber, and the other end of spool is located in second chamber；First chamber includes positioning chamber and position Annular seal space below positioning chamber, the diameter of positioning chamber is more than the diameter of second chamber, and the diameter of positioning chamber is more than annular seal space Diameter；The positioning sleeve for being used to support valve deck is equipped in positioning chamber, be equipped in annular seal space the sealing ring that is located at below positioning sleeve and It is used to support the hollow spacer of sealing ring；Positioning sleeve, sealing ring and spacer are set on the outside of spool, and spacer is equipped with and is used for Sealing ring is prevented to be caught in the cushion space between spool and spacer.

The advantageous effect of above-mentioned technical proposal is：

1st, compared with valve deck stress can pass to the air valve structure of spool by positioning sleeve in the prior art, the technical program In positioning sleeve be located in the annular seal space in valve body, and by positioning chamber diameter be more than annular seal space (i.e. sealing ring and spacer institute Chamber) and second chamber (chamber formed i.e. in valve deck) diameter, so the bottom of positioning sleeve can be supported on valve body, And the top of positioning sleeve can support valve deck, positioning and guiding effect is good；Simultaneously positioning sleeve side will not offset with valve deck or Contact；So that during this air valve actually use, though valve deck by the eccentric force of transverse direction, will not be by positioning interplanting It uses on spool, effectively reduces the risk of spool clamping stagnation, improve use reliability and the service life of air valve.

2nd, compared with the air valve structure that spacer medial surface is designed for flat configuration in the prior art, in the technical program every It puts on equipped with cushion space, in this way during sealing ring stress, even if squeezing the top of spacer, spacer also can be empty in buffering It is interior to deform upon, so as to which sealing ring be effectively prevent to be caught between spool and spacer, ensure the normal condition of sealing ring, avoid close Seal is failed, and improves use reliability and the service life of air valve.

Preferred embodiment one, as the preferred embodiment of basic scheme, the inside of spacer is equipped with groove.It is set on the inside of the spacer Groove structure can not only allow spacer when being squeezed by sealing ring, and the top of spacer can be buffered, and structure by groove Simply.

The preferred embodiment of preferred embodiment two, preferably one, the top of spacer are equipped with protrusion, and protrusion is from valve body to valve Core tilts upwards.When sealing ring is to spool direction extruding spacer, protrusion can give sealing ring reversed active force, further effectively Prevent sealing ring from squeezing into the gap between spool and spacer.

The preferred embodiment of preferred embodiment three, preferably two, the longitudinal section of groove is triangle.Groove is triangle Even if spacer when by sealing ring larger extruding force, might as well to the support effect of sealing ring.

The preferred embodiment of preferred embodiment four, preferably two, the longitudinal section of groove is semicircular arc.Groove is semicircle Arc causes spacer when being squeezed by sealing ring, and deformation nature is more preferably.

Preferred embodiment five, as basic scheme, preferred embodiment one, preferred embodiment two, preferred embodiment three or preferred embodiment four Preferred embodiment, the longitudinal section of positioning sleeve is rectangular, and four angles of positioning sleeve are arc-shaped.Rectangular positioning sleeve positioning and guiding It is better.

The preferred embodiment of preferred embodiment six, preferably five, second chamber include center cavity and under center cavities The end face chamber of side, the diameter of end face chamber are more than the diameter of center cavity.The bottom surface of valve deck and positioning sleeve top surface can be reduced in this way Contact area to preventing valve deck from pushing the better of positioning sleeve, prevents valve core movement effect more preferable.

Description of the drawings

Fig. 1 is the structure diagram of the air valve in background technology；

Fig. 2 is the structure diagram of the anti-spool clamping stagnation air valve structure embodiment of the utility model；

Fig. 3 is the enlarged diagram at A in Fig. 2.

Specific embodiment

Below by the further details of explanation of specific embodiment：

Reference numeral in Figure of description includes：Valve body 1, first chamber 10, valve deck 2, mandril 20, second chamber 21, It is center cavity 22, end face chamber 23, spool 3, positioning chamber 4, positioning sleeve 40, annular seal space 5, O-ring seals 50, spacer 6, groove 60, convex Play 61.

Embodiment is substantially as shown in Figure 2：Anti- spool clamping stagnation air valve structure is pushed up including spool 3, valve body 1 and positioned at valve body 1 The valve deck 2 in portion is equipped with first chamber 10 in valve body 1, is equipped with mandril 20 in valve deck 2, the lower part of valve deck 2 and the bottom of mandril 20 it Between form second chamber 21, second chamber 21 connects with first chamber 10, and the bottom of spool 3 is located in first chamber 10, spool 3 Top be located in second chamber 21, second chamber 21 includes center cavity 22 and the end face chamber 23 positioned at the lower section of center cavity 22, end The diameter of face chamber 23 is more than the diameter of center cavity 22.

First chamber 10 includes positioning chamber 4 and the annular seal space 5 positioned at 4 lower section of positioning chamber, and the diameter of positioning chamber 4 is more than second The diameter of chamber 21, and the diameter of positioning chamber 4 is more than the diameter of annular seal space 5.It is equipped in positioning chamber 4 and is used to support determining for valve deck 2 Position set 40, annular seal space 5 is interior to be equipped with the O-ring seals 50 for being located at 40 lower section of positioning sleeve and is used to support the hollow of O-ring seals 50 Spacer 6；Positioning sleeve 40, O-ring seals 50 and spacer 6 are set in 3 outside of spool.

As shown in figure 3, the inside of spacer 6 is equipped with groove 60, cushion space, groove 60 are formed between groove 60 and spool 3 Longitudinal section for triangle or semicircular arc, the preferred triangle of the present embodiment；The top of spacer 6 is equipped with protrusion 61, protrusion 61 It is tilted upwards from valve body 1 to spool 3.Even if the spacer 6 of this structure when by the larger extruding force of O-ring seals 50, It can effectively prevent O-ring seals 50 to be caught between spool 3 and spacer 6, improve use reliability and the service life of air valve.

The longitudinal section of positioning sleeve 40 is rectangular, and four angles of positioning sleeve 40 are chamfering, i.e., in miniature arc-shaped.By It is more than annular seal space 5 and the diameter of second chamber 21 in the diameter of positioning chamber 4, so the bottom of positioning sleeve 40 can be supported on valve body 1 On, and the top of positioning sleeve 40 can support valve deck 2, positioning and guiding effect is good；The side of positioning sleeve 40 will not be with valve deck 2 simultaneously Offset or contact, so as to fulfill during this air valve is actually used, even if valve deck 2 by lateral eccentric force, also not It can be applied on spool 3 by positioning sleeve 40, effectively reduce the risk of 3 clamping stagnation of spool, improve the use reliability of air valve And the service life.

Above-described is only the embodiment of the utility model, and the common sense such as well known concrete structure and characteristic are herein in scheme It does not describe excessively.It should be pointed out that for those skilled in the art, in the premise for not departing from the utility model structure Under, several modifications and improvements can also be made, these should also be considered as the scope of protection of the utility model, these are not all interfered with The effect and practical applicability that the utility model is implemented.This application claims protection domain should be with the content of its claim Subject to, the records such as specific embodiment in specification can be used for explaining the content of claim.

Claims (7)

1. including spool, valve body and the valve deck positioned at body top, the first chamber is equipped in valve body for anti-spool clamping stagnation air valve structure Room is equipped with the second chamber connected with first chamber in valve deck, and one end of the spool is located in first chamber, spool it is another End is located in second chamber；It is characterized in that：The first chamber includes positioning chamber and the annular seal space below positioning chamber, institute The diameter for stating positioning chamber is more than the diameter of second chamber, and the diameter of positioning chamber is more than the diameter of annular seal space；In the positioning chamber The sealing ring being located at below positioning sleeve is equipped with equipped with the positioning sleeve for being used to support valve deck, in the annular seal space and is used to support sealing The hollow spacer of circle；The positioning sleeve, sealing ring and spacer are set on the outside of spool, and the spacer is equipped with to prevent Sealing ring is caught in the cushion space between spool and spacer.

2. anti-spool clamping stagnation air valve structure according to claim 1, it is characterised in that：The inside of the spacer is equipped with recessed Slot.

3. anti-spool clamping stagnation air valve structure according to claim 2, it is characterised in that：The top of the spacer is equipped with convex It rises, the protrusion tilts upwards from valve body to spool.

4. anti-spool clamping stagnation air valve structure according to claim 3, it is characterised in that：The longitudinal section of the groove is triangle Shape.

5. anti-spool clamping stagnation air valve structure according to claim 3, it is characterised in that：The longitudinal section of the groove is semicircle Arc.

6. anti-spool clamping stagnation air valve structure according to any one of claim 1 to 5, it is characterised in that：The positioning sleeve Longitudinal section to be rectangular, and four angles of positioning sleeve are arc-shaped.

7. anti-spool clamping stagnation air valve structure according to claim 6, it is characterised in that：The second chamber includes center cavity With the end face chamber below center cavity, the diameter of the end face chamber is more than the diameter of center cavity.