CN106678107A - Speed limiting valve special for forklift truck - Google Patents
Speed limiting valve special for forklift truck Download PDFInfo
- Publication number
- CN106678107A CN106678107A CN201710038524.3A CN201710038524A CN106678107A CN 106678107 A CN106678107 A CN 106678107A CN 201710038524 A CN201710038524 A CN 201710038524A CN 106678107 A CN106678107 A CN 106678107A
- Authority
- CN
- China
- Prior art keywords
- valve
- speed limit
- valve body
- speed limiting
- valve element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- 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
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a speed limiting valve special for a forklift truck. The speed limiting valve comprises a valve shell and a connector which are matched. An outer oil collecting opening Z is formed in the valve shell, and an outer oil collecting opening P is formed in the connector. A valve element assembly is assembled in the valve shell. The valve element assembly comprises a speed limiting valve body, a speed limiting valve element, an adjusting rod, a throttling valve element, a spring seat and a speed limiting spring. The speed limiting valve element can be assembled in the speed limiting valve body in a sliding manner. One end of the adjusting rod is fixed to the end face of the speed limiting valve element, and a spring seat is assembled at the other end of the adjusting rod. The speed limiting spring is assembled between the spring seat and the speed limiting valve body, and the throttling valve element can be axially arranged on the adjusting rod in a sliding and sleeving manner. The speed limiting valve has the beneficial effects that the structure is simple, the pressure loss in the direction from P to Z is small, and the speed limiting flow difference in the direction from Z to P under different loads is small and stable; and in addition, the flow limiting responding speed is high, and the speed limiting valve can show good performance as well under the limited work condition.
Description
Technical field
The present invention relates to governor valve manufacturing technology field, a kind of especially special governor valve of fork truck.
Background technology
Governor valve is a kind of conventional valve in hydraulic control system, is widely used in pallet fork raising and the decline of fork truck
In.
One is provided with existing governor valve and crosses oiled-plate method, hydraulic oil must all pass through on oiled-plate method in the case of forward and reverse
Hole, is that flow resistance is little when meeting positive, it is necessary to which the hole crossed on oiled-plate method is big, and hole flow resistance greatly when reverse is just little, compression spring
Not enough, speed limit effect is bad for power；If spring force is reduced, in theory it is achieved that but because spring concordance it is bad, by
The reasons such as the frictional force between valve element and valve body, can cause the diversity of speed limit flow big, and the response of existing governor valve
Speed is slow.
There is problems with existing governor valve：
1., under different loads operating mode, the decrease speed of pallet fork has larger difference (it is that deadweight declines that the pallet fork of fork truck declines)；
2., in full speed lifting process, the pressure loss that governor valve is produced is larger for pallet fork；
3. governor valve response speed is not fast enough, and when doing rapid decrease action in the case of load is larger, governor valve response speed is slow
In explosion-proof valve, the moment governor valve of decline does not play speed limit effect, and flow is excessive, and explosion-proof valve is mistaken for pipelines from bursting, now
Explosion-proof valve enters working condition, and speed limit defective valve, pallet fork slowly decline.
In sum, governor valve still has many rooms for improvement, it might even be possible to which the other functions of addition are entered.
The content of the invention
The technical problem to be solved is the present situation for prior art, there is provided simple structure, the pressure loss are little,
A kind of special governor valve of fork truck of fast response time.
The present invention solve the technical scheme that adopted of above-mentioned technical problem for：
A kind of special governor valve of fork truck, includes the valve chest and joint being adapted, offers external hydraulic fluid port Z, connect on valve chest
External hydraulic fluid port P is offered on head, core assembly in valve chest, is equipped with, core assembly includes speed limit valve body, speed limit valve element, adjusts
Pole, throttling valve core, spring base and speed limit spring, speed limit valve element axially slidably can be assemblied in the governor valve body,
The end face of one end of adjusting rod and the speed limit valve element is mutually fixed, and spring base, speed limit spring are equipped with the other end of adjusting rod
It is assemblied between the spring base and speed limit valve body, throttling valve core axially slidably can be sheathed on the adjusting rod.
To optimize above-mentioned technical proposal, the concrete measure taken also includes：
A block is provided with the middle part of above-mentioned adjusting rod, extending radially outwardly near spring base one end in throttling valve core is formed with
Rib, throttling valve core can slide between the end face of the block and speed limit valve element.
Above-mentioned spring base includes pedestal, and the periphery of pedestal is evenly arranged with three seat legs in zigzag structure.
Oil pocket is formed with above-mentioned governor valve body, valve body oil-through hole, speed limit valve body on the outer wall of speed limit valve body, is offered
An oil groove is offered inside, the oil groove is connected with the valve body oil-through hole.
Valve element oil-through hole is offered on the outer wall of above-mentioned speed limit valve element, end face is offered on the end face of speed limit valve element excessively oily
Hole.
A convex body is provided with above-mentioned speed limit valve body, speed limit spring is placed on outside the convex body.
Above-mentioned speed limit valve body is threadedly coupled with the valve chest, is provided with flat recess on the end face of speed limit valve body.
The opening of above-mentioned speed limit valve body is provided with earless jump ring, and speed limit valve element can be in earless jump ring and speed limit valve body
End face between slide.
One end of above-mentioned adjusting rod is mutually fixed by the end face of sunk screw and the speed limit valve element, adjusting rod it is another
End is provided with two nuts on the outside of the spring base.
O-ring seals, valve chest and joint screw thread connection are provided between above-mentioned valve chest and joint.
Compared with prior art, the special governor valve of a kind of fork truck of the invention, offers external hydraulic fluid port Z, connects on its valve chest
External hydraulic fluid port P is offered on head, the core assembly in valve casing body includes speed limit valve body, speed limit valve element, adjusting rod, choke valve
Core, spring base and speed limit spring, after assembling, speed limit valve element can slide axially in governor valve body, and throttling valve core can be
Slide axially on adjusting rod；This governor valve simple structure, P are little to the Z-direction pressure loss；Z to P directions speed limit under different loads
Flow difference is little and stable, and current limliting fast response time, can also show good under limiting condition.
Description of the drawings
Structural representation when Fig. 1 is forward flow of the present invention；
Fig. 2 is the structural representation of core assembly in Fig. 1；
Fig. 3 is the three-dimensional structure diagram of spring base in Fig. 2；
Structural representation when Fig. 4 is reverse flow of the present invention；
Fig. 5 is the hydraulic principle schematic diagram of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Embodiment as shown in Figures 1 to 5,
Figure grade explanation：External hydraulic fluid port Z, external hydraulic fluid port P, valve chest 1, joint 2, speed limit valve body 31, oil pocket 31a, valve body are excessively oily
Hole 31b, oil groove 31c, convex body 31d, flat recess 31e, speed limit valve element 32, valve element oil-through hole 32a, end face oil-through hole 32b, adjusting rod
33rd, block 33a, throttling valve core 34, rib 34a, spring base 35, pedestal 35a, seat leg 35b, speed limit spring 36, earless jump ring 4,
Sunk screw 5, nut 6, O-ring seals 7.
As shown in Figures 1 to 5,
A kind of special governor valve of fork truck, includes the valve chest 1 and joint 2 being adapted, external hydraulic fluid port Z is offered on valve chest 1,
External hydraulic fluid port P is offered on joint 2, in valve chest 1, core assembly is equipped with, core assembly includes speed limit valve body 31, speed limit
Valve element 32, adjusting rod 33, throttling valve core 34, spring base 35 and speed limit spring 36, speed limit valve element 32 axially slidably can be filled
Be assigned in the speed limit valve body 31, the end face of one end of adjusting rod 33 and the speed limit valve element 32 is mutually fixed, adjusting rod 33 it is another
Spring base 35 is equipped with one end, speed limit spring 36 is assemblied between the spring base 35 and speed limit valve body 31, throttling valve core 34
Axially slidably can be sheathed on the adjusting rod 33.
In embodiment, the middle part of adjusting rod 33 is provided with a block 33a, in throttling valve core 34 near spring base one end radially
Stretch out and be formed with rib 34a, throttling valve core 34 can be slided between the block 33a and the end face of speed limit valve element 32.
In embodiment, spring base 35 includes pedestal 35a, and the periphery of pedestal 35a is evenly arranged with three in zigzag structure
Seat leg 35b.
In embodiment, oil pocket 31a is formed with speed limit valve body 31, valve body oil-through hole is offered on the outer wall of speed limit valve body 31
31b, offers an oil groove 31c in speed limit valve body 31, and oil groove 31c is connected with the valve body oil-through hole 31b.
In embodiment, valve element oil-through hole 32a is offered on the outer wall of speed limit valve element 32, is opened up on the end face of speed limit valve element 32
There is end face oil-through hole 32b.
In embodiment, a convex body 31d on speed limit valve body 31, is provided with, speed limit spring 36 is placed on outside convex body 31d.Arrange convex
Body 31d facilitates the assembling of speed limit spring 36.
In embodiment, speed limit valve body 31 is threadedly coupled with the valve chest 1, and a word is provided with the end face of speed limit valve body 31
Groove 31e.Flat recess 31e is set and facilitates being screwed into for speed limit valve body 31 when speed limit valve body 31 is threadedly coupled with valve chest 1.
In embodiment, the opening of speed limit valve body 31 is provided with earless jump ring 4, and speed limit valve element 32 can be in earless jump ring 4
Slide and the end face of speed limit valve body 31 between.
In embodiment, the end face of one end of adjusting rod 33 by sunk screw 5 with the speed limit valve element 32 is mutually fixed, and is adjusted
The other end of bar 33 is provided with two nuts 6 in the outside of the spring base 35.Can play locking using two 6 structures of nut
Effect, ensure that the reliability of connection.
In embodiment, O-ring seals 7 between valve chest 1 and joint 2, are provided with, valve chest 1 and joint 2 are threadedly coupled.
Operation principle：
Positive working condition (P to Z) i.e. pallet fork is lifted, and now hydraulic oil is entered from external hydraulic fluid port P, and then hydraulic oil is through valve chest 1
With the oil duct between speed limit valve body 31, oil groove 31c is entered from valve body oil-through hole 31b, then enter governor valve from valve element oil-through hole 32a
In core 32, speed limit valve element 32 is then flowed axially through, flow out from the opening of speed limit valve element 32, flow in the cavity of valve chest 1, most
After flow through spring base 35 and flow out from external hydraulic fluid port Z.During positive working condition, throttling valve core 34 is offseted with block 33a positioned at left limit, limit
Fast valve element 32 also is located at left limit and is offseted with earless jump ring 4；Under this state, all oil-through holes, excessively oily passage are all in maximum open
Position, so the pressure loss very little that governor valve is produced.
Reverse condition (Z to P) i.e. pallet fork deadweight declines, and hydraulic oil enters fashionable from external hydraulic fluid port Z, after flowing through spring base 35,
The resistance of throttling valve core 34 is run into, throttling valve core 34 is pushed into into right limit and is offseted with the end face of speed limit valve element 32, and promote speed limit
Valve element 32 is slided together with adjusting rod 33 to the right, and now speed limit spring 36 is compressed, spring force increase；At this moment, in oil pocket 31a
Hydraulic oil quickly discharged by the end face oil-through hole 32b on speed limit valve element 32, the oil of valve element oil-through hole 32a and speed limit valve body 31
Pasta product of crossing between groove 31c reduces, and flow resistance increase, excessively oily flow reduce.Both flow resistances and spring force when generation reach flat
During weighing apparatus, speed limit flow tends to a steady state value, as the hydraulic oil in oil pocket 31a is quickly discharged by end face oil-through hole 32b, makes
Whole response valve is quick, the various actual condition checkings of Jing, the speed limit flow of this governor valve difference very little under different loads.
During this governor valve reverse condition, spring force increase, at this moment frictional force proportion is then greatly reduced, the shadow of frictional force
Sound is negligible；In addition, the spring force of speed limit spring 36 can be adjusted by nut 6, it is ensured that consistent during product export
Property, can be adjusting reverse speed limit flow according to the demand of client within the specific limits.
Highly preferred embodiment of the present invention is elucidated with, and the various change made by those of ordinary skill in the art or remodeling are all
It is without departing from the scope of the invention.
Claims (10)
1. a kind of special governor valve of fork truck, includes the valve chest (1) and joint (2) being adapted, opens on described valve chest (1)
External hydraulic fluid port Z is provided with, and external hydraulic fluid port P is offered on described joint (2), be it is characterized in that：It is equipped with described valve chest (1)
Core assembly, described core assembly include speed limit valve body (31), speed limit valve element (32), adjusting rod (33), throttling valve core
(34), spring base (35) and speed limit spring (36), described speed limit valve element (32) can axially slidably be assemblied in the limit
In fast valve body (31), described one end of adjusting rod (33) is mutually fixed with the end face of the speed limit valve element (32), described regulation
Spring base (35) is equipped with the other end of bar (33), described speed limit spring (36) is assemblied in the spring base (35) and speed limit
Between valve body (31), described throttling valve core (34) axially slidably can be sheathed on the adjusting rod (33).
2. a kind of special governor valve of fork truck according to claim 1, is characterized in that：Set in the middle part of described adjusting rod (33)
A block (33a) is equipped with, extending radially outwardly near spring base one end in described throttling valve core (34) is formed with rib
(34a), described throttling valve core (34) can be slided between the end face of the block (33a) and speed limit valve element (32).
3. a kind of special governor valve of fork truck according to claim 2, is characterized in that：Described spring base (35) includes seat
Body (35a), the periphery of described pedestal (35a) are evenly arranged with three seat legs (35b) in zigzag structure.
4. a kind of special governor valve of fork truck according to claim 3, is characterized in that：Formed in described speed limit valve body (31)
There is an oil pocket (31a), on the outer wall of described speed limit valve body (31), offer valve body oil-through hole (31b), described speed limit valve body
(31) oil groove (31c) is offered in, the oil groove (31c) is connected with the valve body oil-through hole (31b).
5. a kind of special governor valve of fork truck according to claim 4, is characterized in that：The outer wall of described speed limit valve element (32)
On offer valve element oil-through hole (32a), offer end face oil-through hole (32b) on the end face of described speed limit valve element (32).
6. a kind of special governor valve of fork truck according to claim 5, is characterized in that：Arrange on described speed limit valve body (31)
There is a convex body (31d), described speed limit spring (36) is placed on the convex body (31d) outward.
7. a kind of special governor valve of fork truck according to claim 6, is characterized in that：Described speed limit valve body (31) with it is described
Valve chest (1) is threadedly coupled, and is provided with flat recess (31e) on the end face of described speed limit valve body (31).
8. a kind of special governor valve of fork truck according to claim 7, is characterized in that：The opening of described speed limit valve body (31)
End is provided with earless jump ring (4), described speed limit valve element (32) can the end face of earless jump ring (4) and speed limit valve body (31) it
Between slide.
9. a kind of special governor valve of fork truck according to claim 8, is characterized in that：One end of described adjusting rod (33) leads to
The end face that sunk screw (5) is crossed with the speed limit valve element (32) is mutually fixed, and the other end of described adjusting rod (33) is in the bullet
Two nuts (6) are provided with the outside of spring abutment (35).
10. a kind of special governor valve of fork truck according to claim 9, is characterized in that：Described valve chest (1) and joint
(2) O-ring seals (7), described valve chest (1) and joint (2) threaded connection are provided between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710038524.3A CN106678107B (en) | 2017-01-19 | 2017-01-19 | A kind of special governor valve of fork truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710038524.3A CN106678107B (en) | 2017-01-19 | 2017-01-19 | A kind of special governor valve of fork truck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106678107A true CN106678107A (en) | 2017-05-17 |
| CN106678107B CN106678107B (en) | 2018-01-09 |
Family
ID=58860715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710038524.3A Active CN106678107B (en) | 2017-01-19 | 2017-01-19 | A kind of special governor valve of fork truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106678107B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692154A (en) * | 2020-06-23 | 2020-09-22 | 三一海洋重工有限公司 | Speed limiting valve |
| CN112797208A (en) * | 2021-01-05 | 2021-05-14 | 绍兴泰格机电技术有限公司 | Novel speed limiting valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201401385Y (en) * | 2009-04-30 | 2010-02-10 | 浙江安捷制动器有限公司 | Speed-limiting valve |
| CN201779086U (en) * | 2010-08-15 | 2011-03-30 | 芜湖瑞创叉车有限公司 | Speed limiting valve for fork truck |
| CN202108801U (en) * | 2011-06-20 | 2012-01-11 | 大连叉车有限责任公司 | Built-in speed limiting valve for fork truck |
| CN203130645U (en) * | 2013-03-06 | 2013-08-14 | 绍兴泰格机电技术有限公司 | Safety speed-limiting valve of forklift |
| CN203130647U (en) * | 2013-03-06 | 2013-08-14 | 绍兴泰格机电技术有限公司 | Forklift speed-limiting valve with inner groove |
| CN203130646U (en) * | 2013-03-06 | 2013-08-14 | 绍兴泰格机电技术有限公司 | Forklift speed limiting valve |
| CN104196802A (en) * | 2014-09-06 | 2014-12-10 | 蚌埠液力机械有限公司 | Variable type control valve |
| CN206377087U (en) * | 2017-01-19 | 2017-08-04 | 宁波江北宇洲液压设备厂 | A kind of special governor valve of fork truck |
-
2017
- 2017-01-19 CN CN201710038524.3A patent/CN106678107B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201401385Y (en) * | 2009-04-30 | 2010-02-10 | 浙江安捷制动器有限公司 | Speed-limiting valve |
| CN201779086U (en) * | 2010-08-15 | 2011-03-30 | 芜湖瑞创叉车有限公司 | Speed limiting valve for fork truck |
| CN202108801U (en) * | 2011-06-20 | 2012-01-11 | 大连叉车有限责任公司 | Built-in speed limiting valve for fork truck |
| CN203130645U (en) * | 2013-03-06 | 2013-08-14 | 绍兴泰格机电技术有限公司 | Safety speed-limiting valve of forklift |
| CN203130647U (en) * | 2013-03-06 | 2013-08-14 | 绍兴泰格机电技术有限公司 | Forklift speed-limiting valve with inner groove |
| CN203130646U (en) * | 2013-03-06 | 2013-08-14 | 绍兴泰格机电技术有限公司 | Forklift speed limiting valve |
| CN104196802A (en) * | 2014-09-06 | 2014-12-10 | 蚌埠液力机械有限公司 | Variable type control valve |
| CN206377087U (en) * | 2017-01-19 | 2017-08-04 | 宁波江北宇洲液压设备厂 | A kind of special governor valve of fork truck |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692154A (en) * | 2020-06-23 | 2020-09-22 | 三一海洋重工有限公司 | Speed limiting valve |
| CN112797208A (en) * | 2021-01-05 | 2021-05-14 | 绍兴泰格机电技术有限公司 | Novel speed limiting valve |
| CN112797208B (en) * | 2021-01-05 | 2023-03-10 | 绍兴泰格机电技术有限公司 | Speed limiting valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106678107B (en) | 2018-01-09 |
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| CP03 | Change of name, title or address |
Address after: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98 Patentee after: Ningbo Yuzhou Hydraulic Equipment Co.,Ltd. Address before: Jiangbei District in Zhejiang province 315021 Hing Ningbo Yonglu No. 98 Ningbo Jiangbei Yuzhou hydraulic equipment factory Patentee before: NINGBO JIANGBEI YUZHOU HYDRAULIC EQUIPMENT FACTORY |
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