CN103482534B - Forklift inching valve - Google Patents
Forklift inching valve Download PDFInfo
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- CN103482534B CN103482534B CN201310420295.3A CN201310420295A CN103482534B CN 103482534 B CN103482534 B CN 103482534B CN 201310420295 A CN201310420295 A CN 201310420295A CN 103482534 B CN103482534 B CN 103482534B
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- plug
- hole
- ring seals
- plug hole
- pad
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- Forklifts And Lifting Vehicles (AREA)
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Abstract
The invention discloses a forklift inching valve which comprises a valve body, a plug, a first O-shaped sealing ring, a second O-shaped sealing ring and a gasket. The end face of the valve body is sequentially provided with a plug hole and a hole clamping groove from inside to outside, the plug is contained in the plug hole, the first O-shaped sealing ring is also contained in the plug hole and positioned on one side, away from the bottom of the plug hole, of the plug, the gasket is contained at the bottom of the plug hole, one side, facing the gasket, of the plug is a conical face, the second O-shaped sealing ring is positioned between the gasket and the conical face, the second O-shaped sealing ring is compressed by a triangular sealing area formed by the conical face, the gasket and the plug hole to form a first sealing structure, and one side, facing the plug, of the hole clamping groove is of a circular-arc structure in order to be matched with the first O-shaped sealing ring to form a second sealing structure. By designing two sealing structures, the end face of the valve body can be prevented from oil leaking.
Description
Technical field
The present invention relates to valve body, specifically a kind of fork truck inching valve.
Background technology
Fork truck inching valve is one of key components and parts in fork truck hydraulic systems, jointly uses in conjunction with oil feed pump, control cock, fluid clutch.As WD-A8 inching valve, its concrete utilization, in forklift gear-box, forms forklift-walking control system with parts such as oil feed pump, control cock, fluid clutchs.WD-A8 inching valve realizes fork truck fine motion function mainly through changing system pressure value.
As shown in Figure 1, WD-A8 inching valve end face seal structure is made up of in conjunction with valve body 16 plug 10, O-ring seals 12, hole card 14, Leakage in actual use, and be one of modal failure mode of inching valve, particularly end face oil leakage phenomenon is in the majority.The major cause of leakage of oil is caused to be that fitting process O-ring seals 12 is sheared, and the more difficult control of actual mechanical process.
Summary of the invention
For preventing because seal ring shears the leakage of oil caused, the present invention proposes a kind of fork truck inching valve, and it, by changing sealing means, increases dual side seal, very effectively controls end face leakage of oil.
The present invention is achieved in that a kind of fork truck inching valve, and it comprises valve body, plug, the first O-ring seals; The end face of this valve body is disposed with plug hole, hole draw-in groove from inside to outside, and this plug is housed in this plug hole, and this first O-ring seals to be also housed in this plug hole and to be positioned at this plug away from the side bottom this plug hole; Wherein: this fork truck inching valve also comprises the second O-ring seals, pad; This pad is housed in bottom this plug hole, this plug is the conical surface towards the side of this pad, this second O-ring seals, between this pad and this conical surface, forms triangle seal area by this conical surface, this pad and this plug hole three and compresses this second O-ring seals and form first hermetically-sealed construction; This hole draw-in groove is that arc structure is to form second hermetically-sealed construction with this first O-ring seals towards the side of this plug.
Fork truck inching valve of the present invention, by design two seals structure, can guarantee that valve body end face can not leakage of oil.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing fork truck inching valve.
The structural representation of the fork truck inching valve that Fig. 2 provides for better embodiment of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Refer to Fig. 2, the structural representation of its fork truck inching valve provided for better embodiment of the present invention.This fork truck inching valve comprises valve body 20, plug 21, first O-ring seals 22, second O-ring seals 24, pad 25.
The end face of this valve body 20 is disposed with plug hole 26, hole draw-in groove 23 from inside to outside.This plug 21 is housed in this plug hole 26, and this first O-ring seals 22 to be also housed in this plug hole 26 and to be positioned at this plug 21 away from the side bottom this plug hole 26.
This pad 25 is housed in bottom this plug hole 26, this plug 21 is the conical surface towards the side of this pad 25, this second O-ring seals 24, between this pad 25 and this conical surface, forms triangle seal area by this conical surface, this pad 25 and this plug hole 26 three and compresses this second O-ring seals 24 and form first hermetically-sealed construction.This hole draw-in groove 23 is that arc structure is to form second hermetically-sealed construction with this first O-ring seals 22 towards the side of this plug 21.
In sum, the present invention increases a pad 25 in plug hole 26, again plug 21 one end structure is designed to the conical surface, utilize the conical surface, pad 25 and valve body 20 endoporus three to form triangle seal area and compress the second O-ring seals 24, form first hermetically-sealed construction, this seal structures, the second O-ring seals 24 can not be sheared by hole draw-in groove 23 completely when assembling, and can guarantee sealing.Then change the chamfering of hole draw-in groove 23 into arc structure, play without wedge angle, preventing the first O-ring seals 22 on conical surface plug cylindrical to be sheared when assembling, forming second hermetically-sealed construction.
Thus, fork truck inching valve of the present invention, by design two seals structure, can guarantee that valve body end face can not leakage of oil.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. a fork truck inching valve, it comprises valve body, plug, the first O-ring seals; The end face of this valve body is disposed with plug hole, hole draw-in groove from inside to outside, and this plug is housed in this plug hole, and this first O-ring seals to be also housed in this plug hole and to be positioned at this plug away from the side bottom this plug hole; It is characterized in that: this fork truck inching valve also comprises the second O-ring seals, pad; This pad is housed in bottom this plug hole, this plug is the conical surface towards the side of this pad, this second O-ring seals, between this pad and this conical surface, forms triangle seal area by this conical surface, this pad and this plug hole three and compresses this second O-ring seals and form first hermetically-sealed construction; This hole draw-in groove is that arc structure is to form second hermetically-sealed construction with this first O-ring seals towards the side of this plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310420295.3A CN103482534B (en) | 2013-09-13 | 2013-09-13 | Forklift inching valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310420295.3A CN103482534B (en) | 2013-09-13 | 2013-09-13 | Forklift inching valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103482534A CN103482534A (en) | 2014-01-01 |
| CN103482534B true CN103482534B (en) | 2015-07-08 |
Family
ID=49823208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310420295.3A Active CN103482534B (en) | 2013-09-13 | 2013-09-13 | Forklift inching valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103482534B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111673116B (en) * | 2020-06-03 | 2021-09-28 | 临安市顺钢机械有限公司 | Drilling device for valve body of inching valve for forklift and production process of drilling device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150737A (en) * | 1977-08-03 | 1979-04-24 | Clark Equipment Company | Inching valve |
| CN2833261Y (en) * | 2005-10-19 | 2006-11-01 | 中国第一汽车集团公司 | Sealing structure of axle drive bevel pinion bearing pedestal |
| CN201606522U (en) * | 2009-12-31 | 2010-10-13 | 安徽蓝博旺机械有限责任公司 | Micro-valve |
| CN201628012U (en) * | 2009-12-31 | 2010-11-10 | 广东联塑科技实业有限公司 | Metal valve upper sealing structure |
| CN201679997U (en) * | 2010-05-21 | 2010-12-22 | 大连兴龙液压有限公司 | Point acting valve |
| CN202302022U (en) * | 2011-10-28 | 2012-07-04 | 合肥力威汽车油泵有限公司 | Inching valve of hydraulic transmission box |
| CN202955328U (en) * | 2012-10-24 | 2013-05-29 | 西安福斯特动力科技有限公司 | Two-layer sealing plug |
| CN203513207U (en) * | 2013-09-13 | 2014-04-02 | 合肥力威汽车油泵有限公司 | Forklift inching valve |
-
2013
- 2013-09-13 CN CN201310420295.3A patent/CN103482534B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4150737A (en) * | 1977-08-03 | 1979-04-24 | Clark Equipment Company | Inching valve |
| CN2833261Y (en) * | 2005-10-19 | 2006-11-01 | 中国第一汽车集团公司 | Sealing structure of axle drive bevel pinion bearing pedestal |
| CN201606522U (en) * | 2009-12-31 | 2010-10-13 | 安徽蓝博旺机械有限责任公司 | Micro-valve |
| CN201628012U (en) * | 2009-12-31 | 2010-11-10 | 广东联塑科技实业有限公司 | Metal valve upper sealing structure |
| CN201679997U (en) * | 2010-05-21 | 2010-12-22 | 大连兴龙液压有限公司 | Point acting valve |
| CN202302022U (en) * | 2011-10-28 | 2012-07-04 | 合肥力威汽车油泵有限公司 | Inching valve of hydraulic transmission box |
| CN202955328U (en) * | 2012-10-24 | 2013-05-29 | 西安福斯特动力科技有限公司 | Two-layer sealing plug |
| CN203513207U (en) * | 2013-09-13 | 2014-04-02 | 合肥力威汽车油泵有限公司 | Forklift inching valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103482534A (en) | 2014-01-01 |
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