CN202558568U - Electrohydraulic variable-speed operating valve for forklift - Google Patents
Electrohydraulic variable-speed operating valve for forklift Download PDFInfo
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- CN202558568U CN202558568U CN2012201281649U CN201220128164U CN202558568U CN 202558568 U CN202558568 U CN 202558568U CN 2012201281649 U CN2012201281649 U CN 2012201281649U CN 201220128164 U CN201220128164 U CN 201220128164U CN 202558568 U CN202558568 U CN 202558568U
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Abstract
An electrohydraulic variable-speed operating valve for forklift, falling into the technical field of forklift equipment, comprises a valve body; and an inching valve, a speed solenoid valve, a gear shift sliding valve and a directional solenoid valve fitted on the valve body. The speed solenoid valve is connected with the gear shift sliding valve through oil path. The inching valve is connected with the speed solenoid valve and directional solenoid valve through oil path respectively. The oil path is fitted at bottom of the valve body. A spring is fitted between the gear shift sliding valve and the valve body. Oil ports P and C are fitted on the valve body, the oil port C is divided into two paths, one path is connected with oil port D, A or B, and the other path is connected with oil port E. The utility model has the advantages of simple structure, convenient assembly and disassembly, simple maintenance, compact structure, and low cost. All oil paths are disposed at bottom, to avoid machining of multiple oil paths, simplify valve body, facilitate detection and maintenance, reduce failure due to processing, avoid difficult oil path processing, simplify oil path disposition inside valve body, and lower cost.
Description
Technical field
The utility model belongs to the fork truck equipment technical field, is specifically related to a kind of follow-on fork truck electricity liquid speed change maneuvering valve of easy and simple to handle and easy mounting or dismounting.
Background technology
Phenomenons such as it is abominable that the engineer machinery operation ubiquity operating mode, and travel conditions is complicated, and gear shift is frequent.Domestic 5 tons of hydraulic fork lift change speed gear boxs generally adopt machine liquid shift control at present, and frequent gear shift makes the operator very easily produce fatigue, thereby influences efficiency of operation and safety.
The utility model content
To the problems referred to above that exist in the prior art, the purpose of the utility model is to provide a kind of follow-on fork truck electricity liquid speed change maneuvering valve of easy and simple to handle and easy mounting or dismounting.
Described a kind of fork truck electricity liquid speed change maneuvering valve; Comprise valve body; It is characterized in that being equipped with on the described valve body inching valve, speed electromagnetic valve, gear shift guiding valve and direction electromagnetic valve; Described speed electromagnetic valve and gear shift guiding valve are arranged on the same axial location of valve body, and connect through oil circuit, and inching valve is connected through oil circuit respectively with speed electromagnetic valve, direction electromagnetic valve; Described oil circuit is equipped with the bottom at valve body; Be equipped with spring between described gear shift guiding valve and the valve body, the hydraulic fluid port P that is equipped with on the described valve body communicates with hydraulic fluid port C, hydraulic fluid port C is divided into two-way, the one tunnel communicates with hydraulic fluid port D, hydraulic fluid port A or hydraulic fluid port B successively, another road communicates with hydraulic fluid port E.
Described a kind of fork truck electricity liquid speed change maneuvering valve is characterized in that the oil inlet place of described direction electromagnetic valve is equipped with filter screen.
Described a kind of fork truck electricity liquid speed change maneuvering valve is characterized in that described speed electromagnetic valve is a two-position three way magnetic valve.
Through adopting above-mentioned technology, compared with prior art, the beneficial effect of the utility model is following:
1) the utility model compact conformation, valve body light weight, mounting or dismounting convenience, maintenance have simply reduced cost;
2) the utility model adopts the direction electromagnetic valve to replace original manual gear valve rod directly to commutate, and reduces many processing oil ducts, thereby has avoided problem such as oil duct difficult processing; Avoid frequent gear shift, make operator's manoeuvrable, light, comfortable, improved valve quality and the safety that has guaranteed fork truck;
3) the utility model adopts two-position three way magnetic valve; Through the break-make of ATM controller according to the Vehicle Speed control electromagnetic valve, make between 1 grade and 2 grades of the speed threshold and automatically switch, advance at utmost speed and the switching of retreating at a high speed to reach; Avoid frequent hand shift, promote the work efficiency of fork truck;
4) oil duct of the utility model adopts the external oil duct, and oil duct is transition on attachment face, thereby reduces auxiliary hole, simplifies valve body, has made things convenient for and has detected maintenance, has reduced the fault that causes because of processing;
5) the utility model has been installed filter screen on the direction electromagnetic valve, can better protection electromagnetic valve and change speed gear box friction lining, prevent that because of the pollutants electromagnetic valve faults such as stuck or friction lining burns out take place, and mounting or dismounting are convenient, clean simple.
Description of drawings
Fig. 1 is the sectional structure scheme drawing of the utility model;
Fig. 2 is the front view structural representation of the utility model;
Fig. 3 is the upward view structural representation of the utility model Fig. 2;
Fig. 4 is the bottom oil channel structures scheme drawing of the utility model.
Among the figure: 1-inching valve, 2-speed electromagnetic valve, 3-valve body, 4-gear shift guiding valve, 5-spring, 6-direction electromagnetic valve, 7-filter screen.
The specific embodiment
Below in conjunction with Figure of description the utility model is further described:
Shown in Fig. 1-4; A kind of fork truck electricity liquid speed change maneuvering valve comprises valve body 3, is equipped with inching valve 1, speed electromagnetic valve 2, gear shift guiding valve 4 and direction electromagnetic valve 6 on the described valve body 3; Described speed electromagnetic valve 2 is a two-position three way magnetic valve; It and gear shift guiding valve 4 are arranged on the same axial location of valve body 3, and connect through oil circuit, and inching valve 1 is connected through oil circuit respectively with speed electromagnetic valve 2, direction electromagnetic valve 6; Described oil circuit is equipped with the bottom at valve body 3; Be equipped with spring 5 between described gear shift guiding valve 4 and the valve body 3, the hydraulic fluid port P that is equipped with on the described valve body 3 communicates with hydraulic fluid port C, hydraulic fluid port C is divided into two-way, the one tunnel communicates with hydraulic fluid port D, hydraulic fluid port A or hydraulic fluid port B successively, another road communicates with hydraulic fluid port E.The utility model is in order to protect direction electromagnetic valve 6 and change speed gear box friction lining, prevents that because of the pollutants electromagnetic valve faults such as stuck or friction lining burns out take place, and are equipped with filter screen 7 at the oil inlet place of direction electromagnetic valve 6.
Described direction electromagnetic valve 6 is connected with valve body 3, and valve body 3 is connected with change speed gear box, is used for the oil that comes of switched system pump, and fuel feeding is given the forward and backward shelves of change speed gear box power-transfer clutch exactly, to reach the switching that moves forward and backward.
Described speed electromagnetic valve 2 is connected with gear shift guiding valve 4, through the break-make of ATM controller according to Vehicle Speed control rate electromagnetic valve 2, makes between 1 grade and 2 grades of the speed threshold and automaticallyes switch, and advances at utmost speed and the switching of retreating at a high speed to reach.
When described micrometering valve 1 advanced, the gearbox gear-shift oil cylinder working-pressure can be changing toward low from high of certain rule with the variation of propelling stroke, until the gear off-load.
The working process of the utility model is following: behind engine starting, oil feed pump carries out fuel feeding to the pressure regulating valve that is installed on the tor-con housing, and pressure regulating valve sets up oil pressure at 1.2～1.5MPa simultaneously; Oil flows through micrometering valve 1 back and divides two-way; Lead up to oil duct arrival direction electromagnetic valve 6, this moment, electromagnetic valve was in neutral state, gear shifting handle is placed advance or during going-back position; Direction electromagnetic valve 6 switches to and advances or direction of retreat; Piston just is in and advances or retreat P PARK Position P, and oil begins to flow to advance 1 grade or retreat 1 grade of power-transfer clutch of gear shift guiding valve 4, thereby realizes advancing or retreating switching; Another road is through oil duct arrival rate electromagnetic valve 2; After speed reaches setting value, notify the ATM controller to open the speed electromagnetic valve 2 of T/M control cock through the sensor that is installed on the change speed gear box, make speed be in 2 P PARK Position Ps; Oil begins to flow to 2 grades of power-transfer clutchs, thereby realizes that high low speed switches.
As shown in Figure 4; The oil circuit of the utility model is controlled as follows: oil arrives hydraulic fluid port C through micrometering valve 1 bar inner chamber UNICOM after getting into valve body hydraulic fluid port P from change speed gear box, and divide two-way then: the one road from hydraulic fluid port D approach axis electromagnetic valve 6; The hydraulic fluid port A of direction electromagnetic valve 6, hydraulic fluid port B lead to gear shift guiding valve 4; And respectively with gear shift guiding valve 4 advance 1 grade with retreat 1 grade of UNICOM, direction electromagnetic valve 6 initial conditions are obstructed oil, the energising of 6 liang of end-coils of direction of passage electromagnetic valve realizes logical oil of hydraulic fluid port A or the logical oil of hydraulic fluid port B; Make oil circuit and advance 1 grade or retreat 1 grade of UNICOM, thus realize advancing 1 grade with retreat 1 grade of switching; Another road is from hydraulic fluid port E admission velocity electromagnetic valve 2, and the oil outlet of speed electromagnetic valve 2 is through valve inner oil duct and gear shift guiding valve 4 head UNICOMs, when 2 energisings of speed electromagnetic valve; Oil gets into gear shift guiding valve 4 heads, promotes the gear shift guiding valve and moves, and the next oily of direction electromagnetic valve 6 switched to 2 grades from 1 grade; When 2 outages of speed electromagnetic valve; Gear shift guiding valve 4 head oil circuits are through speed electromagnetic valve 2 and back oil road UNICOM, and gear shift guiding valve 4 is returned to initial position under the effect of spring 5, and the oil that comes of direction electromagnetic valve 6 switches to 1 grade again by 2 grades; Whether energising through ATM controller control rate electromagnetic valve 2; Gear shift guiding valve 4 is acted on, realize the high low-tach switching of gear, thereby realize advancing at utmost speed and retreating at a high speed.
The electric liquid speed change maneuvering valve of the utility model adopts the direction electromagnetic valve to replace original manual gear valve rod to commutate, and adopts the speed solenoid control of two-position three way; Avoid frequent gear shift, make operator's manoeuvrable, light, comfortable, improved valve quality and the safety that has guaranteed fork truck; It is simple in structure, mounting or dismounting are convenient, maintenance is simple, compact conformation, cost-cutting, and all oil circuits all are arranged on the bottom, reduce many processing oil ducts; Simplify valve body; Made things convenient for and detected maintenance, reduced the fault that causes because of processing, thereby avoided problem such as oil duct difficult processing; Simplify the oil duct of valve inner and arranged, reduced cost.
Claims (3)
1. fork truck electricity liquid speed change maneuvering valve; Comprise valve body (3); It is characterized in that being equipped with on the described valve body (3) inching valve (1), speed electromagnetic valve (2), gear shift guiding valve (4) and direction electromagnetic valve (6); Described speed electromagnetic valve (2) is arranged on the same axial location of valve body (3) with gear shift guiding valve (4), and connects through oil circuit, and inching valve (1) is connected through oil circuit respectively with speed electromagnetic valve (2), direction electromagnetic valve (6); Described oil circuit is equipped with the bottom in valve body (3); Be equipped with spring (5) between described gear shift guiding valve (4) and the valve body (3), the hydraulic fluid port P that is equipped with on the described valve body (3) communicates with hydraulic fluid port C, hydraulic fluid port C is divided into two-way, the one tunnel communicates with hydraulic fluid port D, hydraulic fluid port A or hydraulic fluid port B successively, another road communicates with hydraulic fluid port E.
2. a kind of fork truck electricity liquid speed change maneuvering valve according to claim 1 is characterized in that the oil inlet place of described direction electromagnetic valve (6) is equipped with filter screen (7).
3. a kind of fork truck electricity liquid speed change maneuvering valve according to claim 1 is characterized in that described speed electromagnetic valve (2) is a two-position three way magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201281649U CN202558568U (en) | 2012-03-30 | 2012-03-30 | Electrohydraulic variable-speed operating valve for forklift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201281649U CN202558568U (en) | 2012-03-30 | 2012-03-30 | Electrohydraulic variable-speed operating valve for forklift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202558568U true CN202558568U (en) | 2012-11-28 |
Family
ID=47208248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201281649U Expired - Lifetime CN202558568U (en) | 2012-03-30 | 2012-03-30 | Electrohydraulic variable-speed operating valve for forklift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202558568U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925252A (en) * | 2014-03-10 | 2014-07-16 | 杭州前进齿轮箱集团股份有限公司 | Electrically-controlled inching valve |
-
2012
- 2012-03-30 CN CN2012201281649U patent/CN202558568U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925252A (en) * | 2014-03-10 | 2014-07-16 | 杭州前进齿轮箱集团股份有限公司 | Electrically-controlled inching valve |
| CN103925252B (en) * | 2014-03-10 | 2017-01-18 | 杭州前进齿轮箱集团股份有限公司 | Electrically-controlled inching valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |