CN104632743A - Bidirectional tilting self-locking multi-way valve - Google Patents
Bidirectional tilting self-locking multi-way valve Download PDFInfo
- Publication number
- CN104632743A CN104632743A CN201510056880.9A CN201510056880A CN104632743A CN 104632743 A CN104632743 A CN 104632743A CN 201510056880 A CN201510056880 A CN 201510056880A CN 104632743 A CN104632743 A CN 104632743A
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- Prior art keywords
- valve
- spring
- valve body
- adjusting
- spring seat
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The invention belongs to hydraulic elements, and particularly relates to a bidirectional tilting self-locking multi-way valve. According to the multi-way valve, load control valve bodies (5) are installed in inner holes in the upper portions of the left side face and the corresponding right side face of a valve body (3) respectively through threaded connection, a valve rod (1) penetrates through an inner hole in the lower portion of the valve body (3), the left end and right end of the valve rod (1) are sleeved with sealing catches (4) respectively, the portion, in a gland (9), of the valve rod (1) is sleeved with two spring seats (7), the spring seat (7) on the right side is fixed to the right end face of the valve rod (1) by means of a spring seat fixing screw (8) through threaded connection to be limited, a left end of a reset spring (2) is installed on a shoulder of the spring seat (7) on the left side in a pressed mode, and the right end of the reset spring (2) is installed on a shoulder of the spring seat (7) on the right side in a pressed mode. The multi-way valve is easy to assemble, convenient to maintain, high in universality, simple in technology, low in machining cost, and capable of reducing the failure rate of a hydraulic system, preventing automatic forward and backward tiling of a portal in the static state, and guaranteeing the safety of the system, a driver and goods.
Description
Technical field
The invention belongs to hydraulic element, particularly a kind of inclined in two-way self-locking multi-way valve.
Background technique
Conventional forklift hydraulic system is primarily of two hydraulic tilt cylinders in parallel and two single-acting lifting hydraulic cylinders, knuckle section, oil hydraulic pump, multi-way valve, the composition such as pipeline and fuel tank, requirement system can realize the decline that hoists of pallet fork, the hypsokinesis of leaning forward of door frame, and car body the function such as to turn to, because the arrangement space of fork truck limit, these actions must all be completed by a multi-way valve, current forklift multi-way valve all adopts the structure of installing latching valve in valve rod, meet the safety requirement of forklift door frame anteversion and retroversion self-locking, this structural type, larger problem is there is: because self-locking spool is arranged in valve rod in production and application, so very high to the requirement on machining accuracy of valve rod hole, complex process, process-cycle and cost can increase by 3 ~ 4 times by valve rod than general, conforming product rate is low, when the quality of fit of self-locking spool in valve rod is not high, there will be latching valve and do not open, cause door frame to be failure to actuate or self-locking is malfunctioning occurs that door frame leans forward phenomenon automatically, exists serious potential safety hazard, when forklift door frame leans forward, because needs are by 5 ~ 6 staggered aperture oil extractions on valve rod, therefore very high back pressure can be produced at fork truck hydraulic tilt cylinder rod chamber, cause hydraulic system temperature rise too high, easily cause hydraulic system element damage and seal element aging, self-locking spool can only be arranged in an active chamber of multi-way valve, when all there being the requirement of self-locking to two active chambers, then cannot realize.
Summary of the invention
The object of the invention is to overcome above-mentioned technical deficiency, provide a kind of safe and reliable, be convenient to processing, the inclined in two-way self-locking multi-way valve that hydraulic system element damages and seal element is aging can be avoided.
The technological scheme that technical solution problem of the present invention adopts is: inclined in two-way self-locking multi-way valve comprises valve body, load control valve valve body, sealing catch, Returnning spring, gland, spring seat, spring seat set screw, be characterized in body cavity, being respectively equipped with A active chamber, B active chamber, back oil road, triangle oil duct, meta oil duct, ring shaped oil passage, valve body upper-end surface is respectively equipped with the outlet of A chamber and the outlet of B chamber, the outlet of A chamber is communicated with A active chamber, the outlet of B chamber is communicated with B active chamber, the left side that valve body is mutually corresponding, be threaded respectively in endoporus above right bi-side and load control valve valve body is housed, be threaded in load control valve valve body right-hand member endoporus and main valve seat is housed, main valve plug is installed in main valve seat, one end of main spool spring is installed in main valve plug, the other end of main spool spring is installed in the groove of pressuring adjusting valve base right side, in pressuring adjusting valve base left end endoporus, adjusting pressuring valve core is housed, adjusting pressuring valve core is set with pressure adjusting spring, the right-hand member of pressure adjusting spring is fitted on the shoulder of adjusting pressuring valve core, the left end of pressure adjusting spring is fitted on the right side of pressure regulating screw, pressure regulating screw is threaded on valve body, and pressure regulating screw right-hand member is sleeved on the left end head of adjusting pressuring valve core, pressure regulating screw is set with packing ring, and the lock screw that is threaded is spacing, valve rod is installed in endoporus below valve body, valve rod is left, right two ends are set with sealing catch, sealing catch is screwed at valve body left respectively, on right flank, be screwed outside the sealing catch on right side and gland is housed, valve rod in gland is set with two spring seats, the spring seat spring seat set screw on right side is threaded and is fixed on valve rod right side upper limit, two spring seats are set with Returnning spring jointly, the left end of Returnning spring is fitted on the shoulder of left side spring seat, the right-hand member of Returnning spring is fitted on the shoulder of right side spring seat.
The invention has the beneficial effects as follows: the assembling of inclined in two-way self-locking multi-way valve is simple, easy to maintenance, universal performance is good, technique is simple, and processing cost is low, overcomes the too high problem causing system temperature rise of original structure return oil pressure, reduce the rate of fault of hydraulic system, eliminate latching valve shake, the malfunctioning or defect of not opening, avoid that door frame can automatically lean forward when static, the phenomenon of hypsokinesis, ensure that the safety of system, driver and goods.
Accompanying drawing explanation
Illustrate with embodiment below in conjunction with accompanying drawing.
Fig. 1 is inclined in two-way self-locking multi-way valve structure sectional view.
Fig. 2 is load control valve structure sectional view in Fig. 1.
In figure, 1-valve rod; 2-Returnning spring; 3-valve body; 3-1-back oil road; 3-2-B active chamber; 3-3-triangle oil duct; 3-4-meta oil duct; 3-5-ring shaped oil passage; 3-6-A active chamber; 3-7-A chamber exports; 3-8-B chamber exports; 4-seals catch; 5-load control valve valve body; 5-1-lock screw; 5-2-adjusting pressuring valve core; 5-3-main valve seat; 5-4-main valve plug; 5-5-main spool spring; 5-6-pressuring adjusting valve base; 5-7-pressure adjusting spring; 5-8-packing ring; 5-9-pressure regulating screw; 6-inclined cylinder; 6-1-inclined cylinder rodless cavity; 6-2-inclined cylinder rod chamber; 7-spring seat; 8-spring seat set screw; 9-gland.
Embodiment
Embodiment, with reference to accompanying drawing 1, 2, A active chamber 3-6 is respectively equipped with in valve body 3 inner chamber of inclined in two-way self-locking multi-way valve, B active chamber 3-2, back oil road 3-1, triangle oil duct 3-3, meta oil duct 3-4, ring shaped oil passage 3-5, valve body 3 upper-end surface is respectively equipped with A chamber outlet 3-7 and B chamber outlet 3-8, B chamber outlet 3-8 connects the inclined cylinder rodless cavity 6-1 of inclined cylinder 6, A chamber outlet 3-7 and A active chamber 3-6 is communicated with, B chamber outlet 3-8 and B active chamber 3-2 is communicated with, B chamber outlet 3-8 is communicated with the inclined cylinder rodless cavity 6-1 of inclined cylinder 6, A chamber outlet 3-7 is communicated with the inclined cylinder rod chamber 6-2 of inclined cylinder 6.Be threaded respectively in endoporus above the arranged on left and right sides face that body 3 is mutually corresponding and load control valve valve body 5 is housed, be threaded in load control valve valve body 5 right-hand member endoporus and main valve seat 5-3 is housed, main valve plug 5-4 is installed in main valve seat 5-3, install one end of main spool spring 5-5 in main valve plug 5-3, the other end of main spool spring 5-5 is installed in the groove of pressuring adjusting valve base 5-6 right side.In pressuring adjusting valve base 5-6 left end endoporus, adjusting pressuring valve core 5-2 is housed, adjusting pressuring valve core 5-2 is set with pressure adjusting spring 5-7, and the right-hand member of pressure adjusting spring 5-7 is fitted on the shoulder of adjusting pressuring valve core 5-2, and the left end of pressure adjusting spring 5-7 is fitted on the right side of pressure regulating screw 5-9.Pressure regulating screw 5-9 is threaded on valve body 3, and pressure regulating screw 5-9 right-hand member is sleeved on the left end head of adjusting pressuring valve core 5-2, pressure regulating screw 5-9 is set with packing ring 5-8, and the lock screw 5-1 that is threaded is spacing.Install valve rod 1 in endoporus below valve body 3, the left and right two ends of valve rod 1 are set with sealing catch 4, and sealing catch 4 is screwed respectively on valve body 3 left and right side, is screwed gland 9 is housed outside sealing catch 4 state on right side.Valve rod 1 in gland 9 is set with two spring seats 7, the spring seat 7 on right side is threaded with spring seat set screw 8 and is fixed on valve rod 1 right side upper limit, common suit Returnning spring 2 on two spring seats 7, the left end of Returnning spring 2 is fitted on the shoulder of left side spring seat 7, and the right-hand member of Returnning spring 2 is fitted on the shoulder of right side spring seat 7.
The working principle of inclined in two-way self-locking multi-way valve is: load control valve is contained in above valve body 3 both sides, the size of pilot pressure can set according to induced pressure, when forklift door frame needs to lean forward, valve rod 1 is advanced to move to right, compression reseting spring 2 from left to right, the meta oil duct 3-4 of valve body 3 is shut by valve rod 1.The pressure oil of main pump enters ring shaped oil passage 3-5 by the triangle oil duct 3-3 of valve body 3, then through the opening of valve rod 1 to B active chamber 3-2, and through B chamber outlet 3-8 to the inclined cylinder rodless cavity 6-1 of inclined cylinder mouth 6, the piston promoting inclined cylinder 6 moves right.Now, the pressure oil of inclined cylinder rod chamber 6-2 opens the load control valve on right side through A chamber outlet 3-7, enters A active chamber 3-6, and the opening through valve rod 1 returns fuel tank to the back oil road 3-1 of valve body 3, completes forklift door frame and leans forward.When needing door frame hypsokinesis, pull-out valve rod 1 moves to left, compression reseting spring 2 from right to left, the meta oil duct 3-4 of valve body 3 is shut by valve rod 1, main pump pressure oil is out by the triangle oil duct 3-3 of valve body 3, enter the ring shaped oil passage 3-5 of valve body 3, through the opening of valve rod 1, enter A active chamber 3-6, open the one-way valve in the load control valve on right side, again through A chamber outlet 3-7 to the inclined cylinder rod chamber 6-2 of inclined cylinder 6, the piston rod of inclined cylinder 6 moves to left, now, the one-way valve of the left load control valve of control B active chamber 3-2 opened by the pressure oil of inclined cylinder rodless cavity 6-1 through B chamber outlet 3-8, the opening of valve rod 1 is entered through B active chamber 3-2, fuel tank is returned through the back oil road 3-1 of valve body 3, forklift door frame realizes hypsokinesis.When forklift engine stops working, main pump is fuel feeding not, even if driver's misoperation handle and valve rod 1, multi-way valve and inclined cylinder 6 is entered owing to there is no pressure oil, just cannot by corresponding for energy another chamber being delivered to inclined cylinder 6, therefore cannot open the load control valve of A active chamber 3-6 or B active chamber 3-2, pressure oil is locked in the respective oil pocket of inclined cylinder 6, and forklift door frame leans forward with hypsokinesis action all by locking.
Claims (2)
1. an inclined in two-way self-locking multi-way valve, comprise valve body (3), load control valve valve body (5), sealing catch (4), Returnning spring (2), gland (9), spring seat (7), spring seat set screw (8), it is characterized in that being respectively equipped with A active chamber (3-6) in valve body (3) inner chamber, B active chamber (3-2), back oil road (3-1), triangle oil duct (3-3), meta oil duct (3-4), ring shaped oil passage (3-5), valve body (3) upper-end surface is respectively equipped with A chamber outlet (3-7) and B chamber outlet (3-8), A chamber outlet (3-7) is communicated with A active chamber (3-6), B chamber outlet (3-8) is communicated with B active chamber (3-2), the left side that valve body (3) is mutually corresponding, be threaded respectively in endoporus above right bi-side and load control valve valve body (5) is housed, valve rod (1) is installed in the endoporus of valve body (3) below, valve rod (1) is left, right two ends are set with sealing catch (4), sealing catch (4) is screwed at valve body (3) left respectively, on right flank, sealing catch (4) outside on right side is screwed is equipped with gland (9), valve rod (1) in gland (9) is set with two spring seats (7), the spring seat (7) on right side is threaded with spring seat set screw (8) and is fixed on valve rod (1) right side upper limit, two spring seats (7) are set with Returnning spring (2) jointly, the left end of Returnning spring (2) is fitted on the shoulder in left side spring seat (7), the right-hand member of Returnning spring (2) is fitted on the shoulder on right side spring seat (7).
2. the inclined in two-way self-locking multi-way valve according to claim (1), it is characterized in that is threaded in load control valve valve body (5) right-hand member endoporus is equipped with main valve seat (5-3), main valve plug (5-4) is installed in main valve seat (5-3), one end of main spool spring (5-5) is installed in main valve plug (5-4), the other end of main spool spring (5-5) is installed in the groove of pressuring adjusting valve base (5-6) right side, in pressuring adjusting valve base (5-6) left end endoporus, adjusting pressuring valve core (5-2) is housed, adjusting pressuring valve core (5-2) is set with pressure adjusting spring (5-7), the right-hand member of pressure adjusting spring (5-7) is fitted on the shoulder of adjusting pressuring valve core (5-2), the left end of pressure adjusting spring (5-7) is fitted on the right side of pressure regulating screw (5-9), pressure regulating screw (5-9) is threaded on valve body (3), and pressure regulating screw (5-9) right-hand member is sleeved on the left end head of adjusting pressuring valve core (5-2), pressure regulating screw (5-9) is set with packing ring (5-8), and the lock screw that is threaded (5-1) is spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510056880.9A CN104632743A (en) | 2015-02-04 | 2015-02-04 | Bidirectional tilting self-locking multi-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510056880.9A CN104632743A (en) | 2015-02-04 | 2015-02-04 | Bidirectional tilting self-locking multi-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104632743A true CN104632743A (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510056880.9A Pending CN104632743A (en) | 2015-02-04 | 2015-02-04 | Bidirectional tilting self-locking multi-way valve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822618A (en) * | 2016-05-22 | 2016-08-03 | 浙江海宏液压科技股份有限公司 | Lifting valve plate of electric-hydraulic proportional multi-way valve of forklift |
| 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 |
-
2015
- 2015-02-04 CN CN201510056880.9A patent/CN104632743A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105822618A (en) * | 2016-05-22 | 2016-08-03 | 浙江海宏液压科技股份有限公司 | Lifting valve plate of electric-hydraulic proportional multi-way valve of forklift |
| CN105822618B (en) * | 2016-05-22 | 2019-01-11 | 浙江海宏液压科技股份有限公司 | A kind of descending valve plate of fork truck electro-hydraulic proportional multi-way 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 |
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Application publication date: 20150520 |