CN205064924U - Control valve, multiple unit valve and fork truck - Google Patents
Control valve, multiple unit valve and fork truck Download PDFInfo
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- CN205064924U CN205064924U CN201520754638.4U CN201520754638U CN205064924U CN 205064924 U CN205064924 U CN 205064924U CN 201520754638 U CN201520754638 U CN 201520754638U CN 205064924 U CN205064924 U CN 205064924U
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Abstract
The utility model discloses a control valve, multiple unit valve and fork truck. The control valve includes valve body and valve rod. Be equipped with valve rod hole, working chamber, first oil return chamber and second oil return chamber in the valve body. Be equipped with first intercommunication groove and oil outlet on the periphery wall of valve rod, be equipped with in the valve rod with the oil return runner of oil outlet intercommunication, oil feed passageway and oil return runner intercommunication are passed through to first intercommunication groove, the movably cover of valve rod is established and downthehole and have lock -in positions and oil return position at the valve rod, first intercommunication groove communicates the working chamber all the time. When lock -in positions, the valve rod cooperates in order to cut working chamber and first oil return chamber, just to cut oil outlet and second oil return chamber with the inner wall in valve rod hole, when the oil return position, and first intercommunication groove intercommunication working chamber and first oil return chamber, oil outlet and second oil return chamber intercommunication. According to the utility model discloses a control valve, the flow of adjustable oil return, pressure improve the fine motion performance of control valve and equipment's accurate polarization. And the internal leakage is few, and the operation sensitivity is high.
Description
Technical field
The utility model relates to Vehicle Engineering technical field, in particular to a kind of control valve, multi-way valve and the fork truck with described multi-way valve.
Background technique
Correlation technique discloses a kind of hydraulic multichannel valve core, this valve core of multiway valve offers the base section chute of multiple combination and auxiliary throttling groove on insert body, the auxiliary throttling groove different by orifice size, chock length is different combines, reach spool flow area and the proportional change of spool travel, and then adjustment enters flow, the pressure of valve port, improve the fretting performance of multi-way valve and the precise positioning of equipment.
Such scheme just improves the fretting performance of multi-way valve and the precise positioning of equipment by the shape and compound mode that adjust throttling groove, but this mode only just can have effect after throttling groove is opened.Because throttling groove needs when spool meta to be hidden by valve body, that is, the part when spool is in meta, spool being arranged throttling groove is positioned at spool bore, and throttling groove cannot circulate fluid.And hinder fluid to flow by very little matching gap between throttling groove and valve body, if both covering length is longer, the flow resistance of oil liquid leakage is larger, therefore along with multi-way valve compressive strength is higher, needs the length of covering longer.
Too short covering length easily causes the internal leakage of multi-way valve excessive, but although long covering length can reduce internal leakage, but owing to only having after throttling groove leaves valve body covering district, fluid could flow, therefore length is hidden longer, the distance that throttling groove starts to act on is longer, namely operates dead band longer.Therefore such scheme effectively can not solve multichannel spool and therefrom open the long problem in this section of operation dead band to throttling groove in position, thus affects the sensitivity of multi-way valve operation.
Model utility content
The utility model is intended to the above-mentioned technical problem solved at least to a certain extent in correlation technique.For this reason, the utility model proposes a kind of control valve, this control valve can be convenient to adjust the flow, the pressure that enter valve port, solves the long problem in operation dead band simultaneously.
The utility model also proposes a kind of multi-way valve, and this multi-way valve can be convenient to adjust the flow, the pressure that enter valve port, solves the long problem in operation dead band simultaneously.
The utility model also proposes a kind of fork truck with described multi-way valve.
For achieving the above object, according to control valve of the present utility model, comprise: valve body, be provided with valve rod hole, active chamber, the first oil back chamber and the second oil back chamber in described valve body, described valve rod hole is communicated with described second oil back chamber with described active chamber, described first oil back chamber respectively, valve rod, the periphery wall of described valve rod is provided with the first connectivity slot and oil outlet, the oil return runner be communicated with described oil outlet is provided with in described valve rod, described first connectivity slot is by oil inlet passage and described oil return flow passage, being set in movably at least partially in described valve rod hole and at least there is lock position and oil return position of described valve rod, described first connectivity slot is communicated with described active chamber all the time, when described lock position, described valve rod coordinates with the inwall of described valve rod hole to block described active chamber and described first oil back chamber, and block described oil outlet and described second oil back chamber, when described oil return position, described first connectivity slot is communicated with described active chamber and described first oil back chamber, described oil outlet is communicated with described second oil back chamber.
According to control valve of the present utility model, by arranging oil return runner on valve rod, when valve rod moves from lock position to oil return position, fluid in active chamber not only by the first connectivity slot directly to the first oil back chamber oil return, fluid in active chamber also by oil outlet to the second oil back chamber oil return, be beneficial to the state of equilibrium maintaining fluid flowing, reach the circulation area of valve rod and the proportional change of displacement of valve rod, regulate flow, the pressure of oil return, thus improve the fretting performance of control valve and the precise positioning of equipment.And oil outlet is to the second oil back chamber oil return but not to the first oil back chamber oil return, and fluid can be made to be cushioned, and internal leakage is few.Because valve rod is by oil outlet draining, the oil outlet not easily internal leakage when lock position, the length that therefore oil outlet place needs the inwall of valve rod hole to hide when lock position without the need to long, thus is conducive to the operation dead band reducing draining, improves the sensitivity of operation.
According to multi-way valve of the present utility model, comprising: oil-feed valve body, described oil-feed valve body is provided with filler opening and return opening, inclination valve body and inclination valve rod, described inclination valve body is fixed on described oil-feed valve body, and described inclination valve rod is located on described inclination valve body movably, hoist valve body and the valve rod that hoists, the described valve body that hoists is fixed on described oil-feed valve body, hoist on valve body described in the described valve rod that hoists is located at movably, wherein, valve rod hole is provided with in the described valve body that hoists, active chamber, first oil back chamber and the second oil back chamber, described valve rod hole respectively with described active chamber, described first oil back chamber is communicated with described second oil back chamber, the periphery wall of the described valve rod that hoists is provided with the first connectivity slot and oil outlet, the oil return runner be communicated with described oil outlet is provided with in the described valve rod that hoists, described first connectivity slot is by oil inlet passage and described oil return flow passage, being set at least partially in described valve rod hole and at least there is bit positions and lowering position of the described valve rod that hoists, described first connectivity slot is communicated with described active chamber all the time, when described bit positions, the described valve rod that hoists coordinates with the inwall of described valve rod hole to block described active chamber and described first oil back chamber, and block described oil outlet and described second oil back chamber, when described lowering position, described first connectivity slot is communicated with described active chamber and described first oil back chamber, described oil outlet is communicated with described second oil back chamber.
According to the multi-way valve of the utility model embodiment, by arranging oil return runner hoisting on valve rod, when the valve rod that hoists moves from bit positions to lowering position, fluid in active chamber not only by the first connectivity slot directly to the first oil back chamber oil return, fluid in active chamber also by oil outlet to the second oil back chamber oil return, be beneficial to the state of equilibrium maintaining fluid flowing, reach the circulation area of the valve rod that hoists and the proportional change of displacement of the valve rod that hoists, regulate flow, the pressure of oil return, thus improve the fretting performance of multi-way valve and the precise positioning of equipment.And oil outlet is to the second oil back chamber oil return but not to the first oil back chamber oil return, and fluid can be made to be cushioned, and internal leakage is few.Because the valve rod that hoists is by oil outlet draining, the oil outlet not easily internal leakage when bit positions, therefore the length that oil outlet place needs the inwall of valve rod hole to hide when bit positions without the need to long, thus is conducive to the operation dead band reducing draining, improves manual dexterity.
According to fork truck of the present utility model, comprise the multi-way valve according to the utility model above-described embodiment.
Additional aspect of the present utility model and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is according to the control valve of the utility model embodiment cross-sectional schematic when lock position;
Fig. 2 is according to the control valve of the utility model embodiment cross-sectional schematic when oil return position;
Fig. 3 is the structural representation of the valve rod according to the utility model embodiment;
Fig. 4 is the cross-sectional schematic along D-D direction in Fig. 3;
Fig. 5 is the structural representation of the multi-way valve according to the utility model embodiment.
Reference character:
Control valve 1, lock position A, oil return position B,
Valve body 11, valve rod hole 111, active chamber 112, first oil back chamber 113, second oil back chamber 114, oil duct 115, passage 116, oil suction chamber 117,
Valve rod 12, first connectivity slot 121, second connectivity slot 122, oil return runner 123, opening 1231, oil inlet passage 124, oil outlet 125, throttling groove 126, first segment chute 1261, second section chute 1262,
Blocking 13, Sealing 14,
Multi-way valve 2, oil-feed valve body 21, filler opening 211, return opening 212, inclination valve body 22, inclination valve rod 23, the valve body 24 that hoists, the valve rod 25 that hoists, tail connection 26.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to 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 " orientation or the position relationship of the instruction such as " center ", " length ", "left", "right", " top ", " end ", " interior ", " outward ", " axis ", " radial direction ", " circumference " they be based on orientation shown in the drawings or position relationship; be only the utility model and simplified characterization for convenience of description; instead of instruction or imply the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.
In description of the present utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, concrete condition the concrete meaning of above-mentioned term in the utility model can be understood.
Below with reference to Fig. 1-Fig. 4, the control valve 1 according to the utility model embodiment is described.
According to the control valve 1 of the utility model embodiment, as depicted in figs. 1 and 2, comprise: valve body 11 and valve rod 12, be provided with valve rod hole 111, active chamber 112, first oil back chamber 113 and the second oil back chamber 114 in valve body 11, valve rod hole 111 is communicated with the second oil back chamber 114 with active chamber 112, first oil back chamber 113 respectively.
As shown in Fig. 1 and Fig. 3, Fig. 4, the periphery wall of valve rod 12 is provided with the first connectivity slot 121 and oil outlet 125, is provided with oil return runner 123, first connectivity slot 121 be communicated with oil outlet 125 and is communicated with oil return runner 123 by oil inlet passage 124 in valve rod 12.
Valve rod 12 be set in valve rod hole 111 at least partially movably, here, valve rod 12 edge, the axial direction of valve rod 12 is mobile in valve rod hole 111.First connectivity slot 121 is communicated with active chamber 112 all the time, valve rod 12 at least has lock position A and oil return position B in valve body 11, when lock position A, valve rod 12 coordinates to block active chamber 112 and the first oil back chamber 113 and blocks oil outlet 125 and the second oil back chamber 114 with the inwall of valve rod hole 111, when oil return position B, the first connectivity slot 121 is communicated with active chamber 112 and is communicated with the second oil back chamber 114 with the first oil back chamber 113, oil outlet 125.
Here, active chamber 112 is for being communicated with the work oil pump of control valve 1 outside, and the first oil back chamber 113, second oil back chamber 114 is for being communicated with the fuel tank of control valve 1 outside.When valve rod 12 is positioned at lock position A, as shown in Figure 1, because active chamber 112 and the first oil back chamber 113 are truncated, oil outlet 125 and the second oil back chamber 114 are also truncated, fluid in work oil pump cannot flow in the first oil back chamber 113 by active chamber 112, active chamber 112 inner fluid also cannot be flowed in the second oil back chamber 114 by oil return runner 123 simultaneously, and the oil pump inner fluid that namely works cannot flow back to fuel tank by control valve 1, and the oil pump that therefore works is in lockup state.
When valve rod 12 is positioned at oil return position B, as shown in Figure 2, fluid in active chamber 112 flows in the first oil back chamber 113 and the second oil back chamber 114 respectively by two oil return paths, and wherein the oil return path of Article 1 fluid is: active chamber 112 → the first connectivity slot 121 → oil inlet passage 124 → oil return runner 123 → oil outlet 125 → the second oil back chamber 114; The oil return path of Article 2 fluid is: active chamber 112 → the first connectivity slot 121 → the first oil back chamber 113.That is, work oil pump inner fluid flows back to fuel tank by control valve 1, and the oil pump that therefore works is in oil return state.
Here it should be noted that, when valve rod 12 is in lock position A, the fluid in valve body 11 in each oil pocket reaches state of equilibrium.When valve rod 12 moves from lock position A to oil return position B, the movement of valve rod 12 destroys above-mentioned state of equilibrium, and valve rod 12 can be subject to the drag of fluid, and cause valve rod 12 to move unstable and delayed, the control accuracy of valve rod 12 declines.By arranging oil return runner 123 oil return, to maintain the state of equilibrium of fluid flowing as far as possible, reach the circulation area of valve rod 12 and the proportional change of displacement of valve rod 12, regulate flow, the pressure of oil return, thus improve the fretting performance of control valve 1 and the precise positioning of equipment.
According to the control valve 1 of the utility model embodiment, by arranging oil return runner 123 on valve rod 12, when valve rod 12 moves from lock position A to oil return position B, fluid in active chamber 112 not only by the first connectivity slot 121 directly to the first oil back chamber 113 oil return, fluid in active chamber 112 also by oil outlet 125 to the second oil back chamber 114 oil return, be beneficial to the state of equilibrium maintaining fluid flowing, reach the circulation area of valve rod 12 and the proportional change of displacement of valve rod 12, regulate the flow of oil return, pressure, thus improve the fretting performance of control valve 1 and the precise positioning of equipment.And oil outlet 125 is to the second oil back chamber 114 oil return but not to the first oil back chamber 113 oil return, fluid can be made to be cushioned, and internal leakage is few.
Relative to the mode only arranging throttling groove draining in traditional design on valve rod, because valve rod 12 is by oil outlet 125 draining in the utility model embodiment, the oil outlet 125 not easily internal leakage when lock position A, therefore the length that oil outlet 125 place needs the inwall of valve rod hole 111 to hide when lock position A is without the need to long, thus be conducive to the operation dead band reducing draining, improve the sensitivity of operation.
In certain embodiments, as depicted in figs. 1 and 2, be also provided with oil suction chamber 117 in valve body 11, oil suction chamber 117 is for being connected with fuel tank, and valve rod 12 also has oil-feed position (scheming not shown) in valve body 11.
When valve rod 12 is moved right by lock position A, valve rod 12 moves to oil-feed position by lock position A, and oil suction chamber 117 is communicated with active chamber 112, and fuel tank inner fluid can along path: oil suction chamber 117 → the first connectivity slot 121 → active chamber 112 flows in work oil pump.
As depicted in figs. 1 and 2, when valve rod 12 is moved to the left by lock position A, valve rod 12 moves to oil return position B by lock position A, and the fluid now in active chamber 112 flows into the first oil back chamber 113 and the second oil back chamber 114 respectively along above-mentioned two oil return paths, repeats no more here.
Particularly, as depicted in figs. 1 and 2, oil duct 115 is also provided with in valve body 11, on the movement direction of valve rod 12, oil duct 115 is between active chamber 112 and the second oil back chamber 114, first oil back chamber 113 is positioned at the side away from oil duct 115 of active chamber 112, and the first oil back chamber 113 is communicated with by passage 116 with the second oil back chamber 114.The periphery wall of valve rod 12 is also provided with the second connectivity slot 122, second connectivity slot 122 for being communicated with oil duct 115 and the second oil back chamber 114.
As shown in Figure 1, on the movement direction of valve rod 12, first oil back chamber 113 and the second oil back chamber 114 are positioned at the both sides of active chamber 112, active chamber 112, oil duct 115 and oil suction chamber 117 are between the first oil back chamber 113 and the second oil back chamber 114, wherein, oil suction chamber 117 is between active chamber 112 and oil duct 115, and active chamber 112 is close to the first oil back chamber 113, contiguous second oil back chamber 114 of oil duct 115.
Particularly, as shown in Figure 1-Figure 3, oil outlet 125 to be located between the first connectivity slot 121 and the second connectivity slot 122 and contiguous second connectivity slot 122 is arranged.When valve rod 12 moves to oil return position B, oil outlet 125 is towards oil duct 115 draining.
Further, valve rod 12 is from lock position A to the moving process of oil return position B, when oil outlet 125 is communicated with the second oil back chamber 114, the displacement distance of valve rod 12 is less than the displacement distance of valve rod 12 when the first connectivity slot 121 is communicated with the first oil back chamber 113.
That is, valve rod 12 is configured to when moving towards oil return position B, and after oil outlet 125 is communicated with the second oil back chamber 114, the first connectivity slot 121 is communicated with the first oil back chamber 113.In other words, valve rod 12 is from lock position A to the moving process of oil return position B, oil outlet 125 is communicated with formerly with the second oil back chamber 114, and the first connectivity slot 121 is communicated with rear with the first oil back chamber 113.
In the specific embodiment of Fig. 1 and Fig. 2, when lock position A, as shown in Figure 1, oil outlet 125 is closed by the inwall of valve rod hole 111, namely oil outlet 125 is not all communicated with oil duct 115, second oil back chamber 114, and the second connectivity slot 122 is only communicated with the second oil back chamber 114 simultaneously.Oil inlet passage 124, first connectivity slot 121 is communicated with active chamber 112 three, and the fluid in active chamber 112 is not all communicated with the first oil back chamber 113, second oil back chamber 114, and system remains static.
When oil return position B, as shown in Figure 2, valve rod 12 is moved to the left, because when oil outlet 125 is communicated with the second oil back chamber 114, the displacement distance of valve rod 12 is less than the displacement distance of valve rod 12 when the first connectivity slot 121 is communicated with the first oil back chamber 113, therefore above-mentioned two oil return paths are communicated with sequentially.
Specifically, when valve rod 12 is slightly to after moving left, Article 1, oil return path is communicated with, and its fluid process of circulation is: active chamber 112 → the first connectivity slot 121 → oil inlet passage 124 → oil return runner 123 → oil outlet 125 → oil duct 115 → the second oil back chamber 114, this is fine motion section.
After valve rod 12 is moved to the left further, while Article 1 oil return path is communicated with, Article 2 oil return path is also communicated with, and the fluid process of circulation in Article 2 oil return path is: active chamber 112 → the first connectivity slot 121 → the first oil back chamber 113.
In certain embodiments, as shown in Figure 1 and Figure 4, oil return runner 123 is opening wide towards the end face of valve rod 12 to form opening 1231, and control valve 1 also comprises: blocking 13, and blocking 13 is located on valve rod 12 with closing openings 1231.Inwardly process oil return runner 123 from the end face of valve rod 12, processing is easier to.Blocking 13 being set in order to ensure the sealing of oil return runner 123, avoiding fluid to flow out valve body 11 from oil return runner 123.
Advantageously, as shown in Figure 1, between blocking 13 and valve rod 12, be provided with Sealing 14, thus improve the sealing between blocking 13 and valve rod 12.
Advantageously, as shown in Figure 4, drainback passage 116 extends along the axis of valve rod 12, oil inlet passage 124 and oil outlet 125 extend along the radial direction of valve rod 12, like this, can processing be further facilitated, and due to valve rod 12 are elongate rod, drainback passage 116, oil inlet passage 124 and oil outlet 125 are arranged like this, and the rigidity of valve rod 12, structural strength also can be avoided to decline too much.
In the example of fig. 4, the central axis of drainback passage 116 and the central axes of valve rod 12.
In certain embodiments, as shown in Figure 3, valve rod 12 is also provided with throttling groove 126, like this, adopt the mode draining that throttling groove 126 and oil outlet 125 combine, advantageously in the state of equilibrium maintaining fluid flowing, reach the circulation area of valve rod 12 and the proportional change of displacement of valve rod 12, regulate flow, the pressure of oil return, improve the fretting performance of control valve 1 and the precise positioning of equipment.
Particularly, as shown in Figure 3, valve rod 12 is provided with first segment chute 1261 and second section chute 1262, contiguous first connectivity slot 121 of first segment chute 1261 arranges for the first oil back chamber 113 draining, and second section chute 1262 to be arranged between the first connectivity slot 121 and the second connectivity slot 122 and contiguous second connectivity slot 122.
More specifically, valve rod 12 is from lock position A to the moving process of oil return position B, when oil outlet 125 is communicated with the second oil back chamber 114, the displacement distance of valve rod 12 is less than the displacement distance of valve rod 12 when first segment chute 1261 is communicated with the first oil back chamber 113, like this, when first segment chute 1261 is not opened, play oil return effect by oil return runner 123, reduce dead band to play, improve the Operational Figure Of Merit of control valve 1 and the effect of fretting performance.
First segment chute 1261 open after both drainings together, carry out draining owing to being provided with oil return runner 123, it is oversize that throttling groove 126 need not leave, and adds sealability, reduces internal leakage.
Below with reference to Fig. 5, the multi-way valve 2 according to the utility model embodiment is described.
According to the multi-way valve 2 of the utility model embodiment, as shown in Figure 5, comprise: oil-feed valve body 21, inclination valve body 22, inclination valve rod 23, hoist valve body 24 and the valve rod 25 that hoists, oil-feed valve body 21 is provided with filler opening 211 and return opening 212, filler opening 211 is connected with fuel tank respectively with return opening 212, fuel tank inner fluid flows into multi-way valve 2 by filler opening 211, and multi-way valve 2 inner fluid flows back to fuel tank by return opening 212.
Inclination valve body 22 is fixed on oil-feed valve body 21, and inclination valve rod 23 is located on inclination valve body 22 movably.The valve body 24 that hoists is fixed on oil-feed valve body 21, and the valve rod 25 that hoists is located at movably and hoists on valve body 24.
In the example of hgure 5, the valve body 24 that hoists is fixed between oil-feed valve body 21 and inclination valve body 22, and multi-way valve 2 also comprises tail connection 26, and tail connection 26 is fixedly connected on inclination valve body 22.
Particularly, be provided with valve rod hole, active chamber, the first oil back chamber and the second oil back chamber in the valve body 24 that hoists, valve rod hole is communicated with the second oil back chamber with active chamber, the first oil back chamber respectively.
The periphery wall of valve rod 25 of hoisting is provided with the first connectivity slot and oil outlet, and be provided with the oil return runner be communicated with oil outlet in the valve rod 25 that hoists, the first connectivity slot is by oil inlet passage and oil return flow passage.Hoist being set in valve rod hole at least partially of valve rod 25, and the first connectivity slot is communicated with active chamber all the time.The valve rod 25 that hoists at least has bit positions and lowering position, when bit positions, the valve rod 25 that hoists coordinates to block active chamber and the first oil back chamber and blocks oil outlet and the second oil back chamber with the inwall of valve rod hole, when lowering position, the first connectivity slot is communicated with active chamber and is communicated with the second oil back chamber with the first oil back chamber, oil outlet.
That is, the valve body 24 that hoists in multi-way valve 2 can be substantially identical with the structure of the valve body 11 of above-mentioned control valve 1, and the valve rod 25 that hoists in multi-way valve 2 also can be substantially identical with the structure of the valve rod 12 of above-mentioned control valve 1.The working principle of valve body 24 and the valve rod 25 that hoists of hoisting in multi-way valve 2 and performance advantage repeat no more.
Here, active chamber is communicated with hoist cylinder, and hoist cylinder is used for the lifting of control gear.Bit positions is equivalent to above-mentioned lock position A, and lowering position is equivalent to above-mentioned oil return position B, and the valve rod 25 that hoists also has lifting position, and lifting position is equivalent to above-mentioned oil-feed position.
When the valve rod 25 that hoists is positioned at bit positions, lift oil tank remains static, and device neither rises and also do not decline.When the valve rod 25 that hoists is positioned at lowering position, lift oil tank is in oil return state, and lift oil tank inner fluid flows back to fuel tank by multi-way valve 2, and device declines.When the valve rod 25 that hoists is positioned at lifting position, lift oil tank is in oil-feed state, and fuel tank is by multi-way valve 2 to lift oil tank delivering oil, and device rises.
According to the multi-way valve 2 of the utility model embodiment, by arranging oil return runner hoisting on valve rod 25, when the valve rod 25 that hoists moves from bit positions to lowering position, fluid in active chamber not only by the first connectivity slot directly to the first oil back chamber oil return, fluid in active chamber also by oil outlet to the second oil back chamber oil return, be beneficial to the state of equilibrium maintaining fluid flowing, reach the circulation area of the valve rod that hoists and the proportional change of displacement of the valve rod that hoists, regulate the flow of oil return, pressure, thus improve the fretting performance of multi-way valve 2 and the precise positioning of equipment.And oil outlet is to the second oil back chamber oil return but not to the first oil back chamber oil return, and fluid can be made to be cushioned, and internal leakage is few.
Relative to the mode only arranging throttling groove draining in traditional design on valve rod, because the valve rod 25 that hoists is by oil outlet draining in the utility model embodiment, the oil outlet not easily internal leakage when bit positions, therefore the length that oil outlet place needs the inwall of valve rod hole to hide when bit positions is without the need to long, thus be conducive to the operation dead band reducing draining, improve the sensitivity of operation.
According to the multi-way valve 2 of the utility model embodiment other form and operation be all known for those of ordinary skills, be not described in detail here.
Fork truck according to the utility model embodiment is described below, comprises the multi-way valve 2 according to the utility model above-described embodiment according to the fork truck of the utility model embodiment.
According to the fork truck of the utility model embodiment, by using the multi-way valve 2 according to the utility model above-described embodiment, there is precise control, sensitive feature.
According to the fork truck of the utility model embodiment other form and operation be all known for those of ordinary skills, be not described in detail here.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present utility model and aim, scope of the present utility model is by claim and equivalents.
Claims (10)
1. a control valve, is characterized in that, comprising:
Valve body, is provided with valve rod hole, active chamber, the first oil back chamber and the second oil back chamber in described valve body, described valve rod hole is communicated with described second oil back chamber with described active chamber, described first oil back chamber respectively;
Valve rod, the periphery wall of described valve rod is provided with the first connectivity slot and oil outlet, the oil return runner be communicated with described oil outlet is provided with in described valve rod, described first connectivity slot is by oil inlet passage and described oil return flow passage, being set in movably at least partially in described valve rod hole and at least there is lock position and oil return position of described valve rod, described first connectivity slot is communicated with described active chamber all the time, when described lock position, described valve rod coordinates with the inwall of described valve rod hole to block described active chamber and described first oil back chamber, and block described oil outlet and described second oil back chamber, when described oil return position, described first connectivity slot is communicated with described active chamber and described first oil back chamber, described oil outlet is communicated with described second oil back chamber.
2. control valve according to claim 1, it is characterized in that, described valve rod is from described lock position to the moving process of described oil return position, when described oil outlet is communicated with described second oil back chamber, the displacement distance of described valve rod is less than the displacement distance of described valve rod when described first connectivity slot is communicated with described first oil back chamber.
3. control valve according to claim 1, is characterized in that, described oil return runner is opening wide towards the end face of described valve rod to form opening;
Described control valve also comprises: blocking, and described blocking is located on described valve rod to close described opening.
4. control valve according to claim 3, is characterized in that, is provided with Sealing between described blocking and described valve rod.
5. control valve according to claim 1, is characterized in that, described drainback passage extends along the axis of described valve rod, and described oil inlet passage and described oil outlet extend along the radial direction of described valve rod.
6. control valve according to claim 1, it is characterized in that, also oil duct is provided with in described valve body, on the movement direction of described valve rod, described oil duct is between described active chamber and described second oil back chamber, described first oil back chamber is positioned at the side away from described oil duct of described active chamber, and described first oil back chamber and described second oil back chamber pass through channel connection;
The periphery wall of described valve rod is also provided with the second connectivity slot for being communicated with described oil duct and described second oil back chamber.
7. control valve according to claim 6, is characterized in that, described oil outlet is located between described first connectivity slot and described second connectivity slot and contiguous described second connectivity slot is arranged.
8. control valve according to claim 1, is characterized in that, described valve rod is also provided with throttling groove.
9. a multi-way valve, is characterized in that, comprising:
Oil-feed valve body, described oil-feed valve body is provided with filler opening and return opening;
Inclination valve body and inclination valve rod, described inclination valve body is fixed on described oil-feed valve body, and described inclination valve rod is located on described inclination valve body movably;
Hoist valve body and to hoist valve rod, described in the valve body that hoists be fixed on described oil-feed valve body, described in hoist valve rod be located at movably described in hoist on valve body,
Wherein, valve rod hole is provided with in the described valve body that hoists, active chamber, first oil back chamber and the second oil back chamber, described valve rod hole respectively with described active chamber, described first oil back chamber is communicated with described second oil back chamber, the periphery wall of the described valve rod that hoists is provided with the first connectivity slot and oil outlet, the oil return runner be communicated with described oil outlet is provided with in the described valve rod that hoists, described first connectivity slot is by oil inlet passage and described oil return flow passage, being set at least partially in described valve rod hole and at least there is bit positions and lowering position of the described valve rod that hoists, described first connectivity slot is communicated with described active chamber all the time, when described bit positions, the described valve rod that hoists coordinates with the inwall of described valve rod hole to block described active chamber and described first oil back chamber, and block described oil outlet and described second oil back chamber, when described lowering position, described first connectivity slot is communicated with described active chamber and described first oil back chamber, described oil outlet is communicated with described second oil back chamber.
10. a fork truck, is characterized in that, comprises multi-way valve according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520754638.4U CN205064924U (en) | 2015-09-25 | 2015-09-25 | Control valve, multiple unit valve and fork truck |
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| CN201520754638.4U CN205064924U (en) | 2015-09-25 | 2015-09-25 | Control valve, multiple unit valve and fork truck |
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| CN205064924U true CN205064924U (en) | 2016-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139596A (en) * | 2017-06-27 | 2019-01-04 | 比亚迪股份有限公司 | Fork truck tilts valve arrangement, multi-way valve and fork truck |
| CN110307200A (en) * | 2018-05-29 | 2019-10-08 | 林德（中国）叉车有限公司 | A kind of fork truck roll control system and method |
| CN111032564A (en) * | 2017-09-13 | 2020-04-17 | 株式会社岛津制作所 | Control valve |
| CN112747139A (en) * | 2021-01-08 | 2021-05-04 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of preventing oil cylinder from creeping |
-
2015
- 2015-09-25 CN CN201520754638.4U patent/CN205064924U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139596A (en) * | 2017-06-27 | 2019-01-04 | 比亚迪股份有限公司 | Fork truck tilts valve arrangement, multi-way valve and fork truck |
| CN109139596B (en) * | 2017-06-27 | 2020-03-31 | 比亚迪股份有限公司 | Forklift tilt valve structure, multi-way valve and forklift |
| CN111032564A (en) * | 2017-09-13 | 2020-04-17 | 株式会社岛津制作所 | Control valve |
| CN110307200A (en) * | 2018-05-29 | 2019-10-08 | 林德（中国）叉车有限公司 | A kind of fork truck roll control system and method |
| CN110307200B (en) * | 2018-05-29 | 2021-04-20 | 林德（中国）叉车有限公司 | Forklift tilt control system and method |
| CN112747139A (en) * | 2021-01-08 | 2021-05-04 | 涌镇液压机械（上海）有限公司 | Reversing valve capable of preventing oil cylinder from creeping |
| CN112747139B (en) * | 2021-01-08 | 2024-06-04 | 涌镇液压机械（上海）有限公司 | Reversing valve for preventing oil cylinder from creeping |
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