CN203430886U

CN203430886U - Shuttle valve and forklift

Info

Publication number: CN203430886U
Application number: CN201320450159.4U
Authority: CN
Inventors: 王力; 郭强
Original assignee: Shaoguan BYD Industrial Co Ltd
Current assignee: Shaoguan BYD Industrial Co Ltd
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2014-02-12
Anticipated expiration: 2023-07-26

Abstract

The utility model provides a shuttle valve, which comprises a valve body, wherein the upper part of the valve body is provided with an oil inlet way for feeding oil and an oil outlet way for draining oil, the interior of the valve body is provided with a valve cavity for containing objects, the oil inlet way and the oil outlet way are communicated with the valve body and the valve cavity, the interior of the valve cavity is provided with at least two sliding pieces, the sliding pieces can freely slide in the valve cavity, and can be used for blocking the oil inlet way and/or oil outlet way, and the sliding pieces adopt elastic assemblies or elastic sliding blocks. The shuttle valve has the advantages that the function that multiple oil ways can be controlled is realized; the problem of less oil ways of a shuttle valve in the prior art is solved; the structure is simple, the occupation space is little, and the installation is convenient. The utility model also provides a forklift comprising the shuttle valve.

Description

A kind of shuttle valve and fork truck

Technical field

The utility model belongs to liquid (gas) the pressure field of one-way flow, relates in particular to a kind of shuttle valve and fork truck.

Background technique

At present, shuttle valve is widely used in liquid (gas) pressing system, and shuttle valve is for automatically connecting the valve body that flows to passage of liquid (gas) medium of different ingress.As shown in Figure 1, traditional shuttle valve comprises valve body, column slide core and plug, valve body in a tubular form and valve body sidepiece offer three through holes, column slide core is positioned at valve body, plug sealed valve body two end part.When leftmost side through hole influent (gas) medium, column slide core is pushed to right side in the effect of pressure like this, thus the through hole of the sealing rightmost side, and now liquid (gas) medium can flow out from the through hole at middle part; When rightmost side through hole influent (gas) medium, column slide core is pushed to left side under the effect of pressure, thus the through hole of the sealing leftmost side, and now liquid (gas) medium can flow out from the through hole at middle part.

Shuttle valve in existing middle hydraulic system is generally three-way shuttle valve, has two filler openings, an oil outlet; Can only control two pipelines, in the equipment in more complicated, often need a shuttle valve can control more pipeline; Realize that this function needs to increase pipeline or valve is realized; And increase pipeline or valve tend to make the shared space of valve body to increase, and when dismounting pipeline or valve, can cause the sealing of valve body poor, the phenomenon of leakage of oil occur, and then hydraulic system cannot be worked or even lose efficacy; The operation during valve body of dismounting is simultaneously very complicated.

Summary of the invention

Technical problem to be solved in the utility model is: shuttle valve oil circuit is few, the technical problem that sealing is poor, space is large.

Accordingly, first object of the present utility model is to provide:

, it comprises valve body; On described valve body top, be provided with some in-lines for oil-feed and some for fuel-displaced vent line; In described valve body, be provided with the valve pocket for glove; Described in-line and described vent line are connected described valve body and valve pocket; In described valve pocket inside, be provided with at least two sliders; Described slider can be in the inner without hindrance slip of valve pocket, and can shutoff in-line and/or vent line; Described slider is for having flexible assembly or having flexible slide blocks.

Preferably, slider comprises the first slider that is arranged on valve pocket left side and the second slider that is arranged on valve pocket right side; Described in-line comprises: be arranged on valve body left side the first in-line, be arranged on second in-line on valve body right side and be arranged on the 3rd in-line of valve body bottom; Described vent line comprises and the main vent line that is arranged on the top of described valve body.

Preferably, the first slider comprises first ball the first slide blocks and connects the first ball and the first elastomer of the first slide blocks; Described the second slider comprises the second ball, the second sliding shoe and connects the second elastomer of the second ball and the second sliding shoe.

Preferably, the first slider and the second slider are divided into the first chamber, the second chamber, the 3rd chamber by valve pocket; Described the first in-line and the first chamber UNICOM; Described the second in-line and described the second chamber UNICOM; Described the 3rd in-line, main vent line be Yu Sanqiang UNICOM respectively.

Preferably, working connection comprises the second oil outlet of the first oil outlet ,Ji Yu valve body UNICOM of Yu Sanqiang UNICOM.

Preferably, in described the first chamber, be also provided with the first vent line of UNICOM the first chamber and main vent line; In described the second chamber, be also provided with the second vent line of UNICOM the second chamber and main vent line.

Preferably, the first in-line oil-feed, and while connecting with the first vent line, described the first slider shutoff the 3rd in-line, the first oil outlet; Second slider shutoff the second in-line, the second vent line.

Preferably, the second in-line oil-feed, and while connecting with the second vent line, described first slider shutoff the first in-line, the first vent line; The second slider is shutoff the 3rd in-line, the first oil outlet respectively.

Preferably, during the 3rd in-line oil-feed, and while connecting with the first oil outlet; Described first slider shutoff the first in-line, the first vent line; The second slider is shutoff the second in-line, the second vent line respectively.

Preferably, the first ball, the diameter of the second ball and the height of valve pocket equate; The height of described the first slide block, the second slide block equates with valve pocket height; And the first ball, the second ball, the first slide block, the second slide block can without hindrance slip in valve pocket.

Preferably, the first elastomer, the second elastomer are spring.

Second object of the present utility model is to provide a kind of fork truck.

, it comprises door frame assembly, vehicle body; Door frame assembly comprises door frame, pallet fork and for controlling the hydraulic system of door frame and pallet fork, hydraulic system comprises for controlling the shuttle valve of hydraulic fluid flow rate; The shuttle valve that shuttle valve provides for the utility model.

The shuttle valve that the utility model provides, it comprises the some vent lines of several in-lines that are arranged on valve body; Realized, the controlled oil circuit of shuttle valve is many, overcome the few problem of its oil circuit of shuttle valve of the prior art, and it is simple in structure, takes up room little, is convenient to install.

Accompanying drawing explanation

Fig. 1 is the three-way shuttle valve that prior art provides.

Fig. 2 is the shuttle valve that the utility model provides.

Fig. 3 is working state Fig. 1 of the shuttle valve that provides of the utility model.

Fig. 4 is working state Fig. 2 of the shuttle valve that provides of the utility model.

Fig. 5 is working state Fig. 3 of the shuttle valve that provides of the utility model.

Fig. 6 is the schematic diagram of the elastic component that provides of the utility model.

Embodiment

Clearer for technical problem, technological scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment who is described with reference to the drawings, be exemplary, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.

In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of indications such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance.

In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can concrete condition understand the concrete meaning of above-mentioned term in the utility model.

Below in conjunction with drawings and Examples, the utility model is described further.

As shown in Fig. 1-6, a kind of shuttle valve, it comprises valve body 1; On valve body 1, be provided with some for the in-

line

21,22,23 of oil-feed with for fuel-displaced vent line 5; In valve body 1, be provided with the valve pocket for glove; In-line and described vent line are connected described valve body 1 and valve pocket; In valve pocket, be provided with at least two sliders 3; Slider 2 can be in the without hindrance slip of valve pocket internals, and can shutoff in-line and/or vent line, and described slider is for having flexible assembly or having flexible slide blocks.

Wherein the general shape of valve body 1 and valve body shape of the prior art are roughly the same; Being chosen as of the material of valve body 1 is conventionally known to one of skill in the art, does not repeat them here.

Internals at valve body 1 are provided with valve pocket; The utility model is not done specific (special) requirements to the shape of valve pocket, can, for cylindrical, can be taper shape yet; Preferably, it is cylindrical; Adopt that columniform valve pocket can make the first slider 31, second slider 32 is expedite in valve pocket, slides.

In valve pocket internals, be at least provided with the first slider 31, the second slider 32; Wherein the first slider 31 comprises the first ball 311, the first slide blocks 313 and connects the first ball 311 and the first elastic component 312 of the first slide blocks 313; The second slider 32 comprises the second ball 321, the second sliding shoe 323 and connects the second elastic component 322 of the second ball 321 and the second sliding shoe 323; Preferably, the diameter of the first ball 311, the second ball 321 roughly with the equal diameters of valve pocket; The first slide blocks 313, the height of the second sliding shoe 323 and the equal diameters of valve pocket; Can guarantee that like this fluid can not leak from the first slider 31, the second slider 32, has guaranteed good sealing in valve pocket; More preferably, the first elastic component 312 and the second elastic component 322 are spring; Wherein the first ball 311, the second ball 321, the first slide blocks 313, the second sliding shoe 323, the first elastic component 312, the second elastic component 322 are conventionally known to one of skill in the art, do not repeat them here.

Another described the first slider 31 can also have bullet one the first slide blocks qualitatively for integral body; Described the second slider 32 can also have certain flexible the second sliding shoe for integral body; And the first slider is connected with the second slider contact, and can shutoff in-line and/or vent line, adopt elastic material to prepare the first slider, the second slider, can make after hydraulic oil is through the first slider 31, the second slider 32, the first slider 31, the second slider 32 can be returned to home position, so that hydraulic operation next time.

The first slider 31, the second slider 32 that are arranged in valve pocket are divided into three sub-chambeies by valve pocket; Be respectively the first chamber 41, the second chamber 42, the 3rd chamber 43; Wherein the first chamber 41 and the first in-line 21 are connected; The second chamber 42 and the second in-line 22 are connected; The 3rd chamber 43 and the 3rd in-line 23 and main vent line 5 are connected; In the first chamber 41, be also provided with the first vent line 51 of UNICOM the first chamber 41 and main vent line 5; In the second chamber 42, be provided with the second vent line 52 of UNICOM the second chamber 42 and main vent line 5; Preferably, main vent line 5 comprises the 3rd oil outlet of Yu Sanqiang 43 UNICOMs and the second oil outlet of valve body 1 UNICOM.The shuttle valve that the utility model provides, oil-feed when three filler openings on it are different, when oil-feed operation starts, has and only has the filler opening can oil-feed, specific as follows:

The first in-line 21 oil-feeds, and while connecting with the first vent line 51, described the first slider 31 shutoff the 3rd in-line 22, the first oil outlet; Second slider 32 shutoff the second in-lines 23, the second vent line 52.

The second in-line 23 oil-feeds, and while connecting with the second vent line 52, described first slider 31 shutoff the first in-lines 21, the first vent line 51; The second slider 32 is shutoff the 3rd in-line 22, the first oil outlet respectively.

During the 3rd in-line 22 oil-feed, and while connecting with main vent line 5; Described first slider 31 shutoff the first in-lines 21, the first vent line 51; The second slider 32 is shutoff the second in-line 23, the second vent line 52 respectively.

The working principle roughly of the shuttle valve that the utility model provides is as follows:

During initial position, the ball 311 of the first slider 31 stops up the first in-line 21, the first vent line 51; The ball 321 of the second slider 32 stops up the second in-line 23, the second vent line 52; And the first slide blocks 313 of the first slider 31 and the second sliding shoe 323 of the second slider 32 stop up the 3rd in-line 22 and main vent line 5 simultaneously.

As shown in Figure 3, the oil pressure of setting the first in-line 21 is that the pressure of A, the second in-line 23 is that the pressure of B, the 3rd in-line 22 is C; When oil pressure A is greater than oil pressure B and oil pressure C, when the pressure of the hydraulic oil of the first in-line 21 is maximum; The first in-line 21 forms path; Fluid enters from the first in-line 21, and promotes the first slider 31 and slide to the right, and the first slider 31 promotes the second sliders 32 and slides to the right; Until the first slider 31 stops up the first oil outlet of the 3rd in-line 22, working connection 5, when the second slider 32 stops up the second in-line 23, the second vent line 52, the first in-line 21 and the first vent line 51 form path, fluid is entered by the first in-line 21, and is flow to working connection 5 and flowed out from the second oil outlet being connected with valve body 1 by the first vent line 51.

As shown in Figure 4, when oil pressure B is greater than oil pressure A and oil pressure C, when the pressure of the hydraulic oil of the second in-line 23 is maximum; The second oil-feed 23 tunnels form path; Fluid enters from the second in-line 23, and promotes the second slider 32 and slide left, and the second slider 32 promotes the first sliders 31 and slides left; Until the first slider 31 stops up the first in-lines 21, the first vent line 51, the second sliders 32 while stopping up the 3rd in-lines 22, the first oil outlet; The second in-line 23 and the second vent line 52 form path, and fluid is entered by the second in-line 23, and is flow to working connection 5 and flowed out from the second oil outlet being connected with valve body 1 by the second vent line 52.

As shown in Figure 5, when oil pressure C is greater than oil pressure A and oil pressure B, when the pressure of the hydraulic oil of the 3rd in-line 22 is maximum; The 3rd in-line 22 forms path; Fluid enters from the 3rd in-line 22, and promote the first slider 31 simultaneously, the second slider 32 slides in the opposite direction, promotes the first slider 31 and slides left, promote the second slider 32 and push right slip to; Until the first slider 31 stops up the first in-line 21, the first oil outlet 51; When the second slider 32 stops up the second in-line 23, the second filler opening 52; The first oil outlet UNICOM of the 3rd in-line 22 and working connection 5, fluid is entered by the 3rd filler opening 22, and flows out from the second oil outlet being connected with valve body 1 by main vent line 5.

Meanwhile, the shuttle valve that the utility model provides also can according to the actual requirements, stop up wherein any one in-line; Make it become three-way shuttle valve, can realize the function of threeway.

General, shuttle valve is three-way shuttle valve, on valve body, has two filler openings and an oil outlet; This shuttle valve can only be realized tee-joint function in simple hydraulic system; In more complicated hydraulic system or equipment, need shuttle valve to realize the function of four-way, and just need to increase pipeline or valve like this, make shuttle valve can realize four-way function; But increase pipeline or valve, will increase the volume of shuttle valve, its shared space is increased; Be not easy to the assembling of hydraulic package integral body; And increase pipeline or valve and can make shuttle valve reduce greatly because dismounting causes its sealing, and produce the phenomenon of leakage of oil, make like this hydraulic system to work, even cause hydraulic system fails; The complicated operation of the valve body of dismounting simultaneously, is not easy to safeguard.

The shuttle valve that the utility model provides, it has been realized in the situation that not increasing pipeline or valve, can make shuttle valve carry out the function of four-way control; Be valve body just can be realized four-way function under its original volume, avoided increasing the situation that pipeline or valve take up space valve body to increase and occurred, can reduce the volume of the machinery of the shuttle valve that installation the utility model provides.

, can avoid when increasing pipeline or valve meanwhile, the sealability variation of the shuttle valve that the dismounting of valve body is caused, and produce the phenomenon of leakage of oil; Improved stability and the Security of valve body, and then the working life of having improved valve body.

Hydraulic system utilizes hydraulic oil to control door frame and pallet fork rises or tilts, and wherein vehicle body, door frame, pallet fork, hydraulic system are conventionally known to one of skill in the art, do not repeat them here.

The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.

Claims

1. a shuttle valve, is characterized in that: it comprises valve body; At described valve body, be provided with several in-lines for oil-feed and for fuel-displaced vent line; In described valve body, be provided with the valve pocket for glove; Described in-line and described vent line are connected described valve body and valve pocket; In described valve pocket inside, be provided with at least two sliders; Described slider can be in the inner without hindrance slip of valve pocket, and can shutoff in-line and/or vent line; Described slider is for having flexible assembly or having flexible slide blocks.

2. shuttle valve as claimed in claim 1, is characterized in that: described slider comprises the first slider that is arranged on valve pocket left side and the second slider that is arranged on valve pocket right side; Described in-line comprises: be arranged on valve body left side the first in-line, be arranged on second in-line on valve body right side and be arranged on the 3rd in-line of valve body bottom; Described vent line comprises and the main vent line that is arranged on the top of described valve body.

3. shuttle valve as claimed in claim 1 or 2, is characterized in that: described the first slider comprises first ball the first slide blocks and connects the first ball and the first elastomer of the first slide blocks; Described the second slider comprises the second ball, the second sliding shoe and connects the second elastomer of the second ball and the second sliding shoe.

4. shuttle valve as claimed in claim 3, is characterized in that: described the first slider and the second slider are divided into the first chamber, the second chamber, the 3rd chamber by valve pocket; Described the first in-line and the first chamber UNICOM; Described the second in-line and described the second chamber UNICOM; Described the 3rd in-line, main vent line be Yu Sanqiang UNICOM respectively.

5. shuttle valve as claimed in claim 4, is characterized in that: working connection comprises the second oil outlet of the first oil outlet ,Ji Yu valve body UNICOM of Yu Sanqiang UNICOM.

6. shuttle valve as claimed in claim 5, is characterized in that: the first vent line that is also provided with UNICOM the first chamber and main vent line in described the first chamber; In described the second chamber, be also provided with the second vent line of UNICOM the second chamber and main vent line.

7. shuttle valve as claimed in claim 6, is characterized in that: described the first in-line oil-feed, and while connecting with the first vent line, described the first slider shutoff the 3rd in-line, the first oil outlet; Second slider shutoff the second in-line, the second vent line.

8. shuttle valve as claimed in claim 7, is characterized in that: described the second in-line oil-feed, and while connecting with the second vent line, described first slider shutoff the first in-line, the first vent line; The second slider is shutoff the 3rd in-line, the first oil outlet respectively.

9. shuttle valve as claimed in claim 8, is characterized in that: during described the 3rd in-line oil-feed, and while connecting with the first oil outlet; Described first slider shutoff the first in-line, the first vent line; The second slider is shutoff the second in-line, the second vent line respectively.

10. shuttle valve as claimed in claim 9, is characterized in that: described the first ball, the diameter of the second ball and the height of valve pocket equate; The height of described the first slide block, the second slide block equates with valve pocket height; And the first ball, the second ball, the first slide block, the second slide block can without hindrance slip in valve pocket.

11. shuttle valves as claimed in claim 3, is characterized in that: described the first elastomer, the second elastomer are spring.

12. 1 kinds of fork trucks, it comprises door frame assembly, vehicle body; Described door frame assembly comprises door frame, pallet fork and for controlling the hydraulic system of door frame and pallet fork, described hydraulic system comprises for controlling the shuttle valve of hydraulic fluid flow rate, it is characterized in that: described shuttle valve is the shuttle valve described in claim 1-11 any one.