CN203033727U - Working device emergency dropping system of diesel fork lift truck - Google Patents
Working device emergency dropping system of diesel fork lift truck Download PDFInfo
- Publication number
- CN203033727U CN203033727U CN 201220712046 CN201220712046U CN203033727U CN 203033727 U CN203033727 U CN 203033727U CN 201220712046 CN201220712046 CN 201220712046 CN 201220712046 U CN201220712046 U CN 201220712046U CN 203033727 U CN203033727 U CN 203033727U
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- valve
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- fork lift
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Abstract
The utility model provides a working device emergency dropping system of a diesel fork lift truck. The working device emergency dropping system comprises a hydraulic oil tank. A first gear pump and a second gear pump are connected with each other and are respectively connected with the hydraulic oil tank through a filter. The second gear pump is connected with a hydraulically controlled multi-way valve. The first gear pump is connected with a pilot valve and a safety valve. The safety valve is connected with the hydraulic oil tank. The pilot valve is connected with the hydraulically controlled multi-way valve. The hydraulically controlled multi-way valve and the pilot valve are connected with the hydraulic oil tank through an oil return filter. The hydraulically controlled multi-way valve is connected with two lifting cylinders through a governor valve. The two lifting cylinders are mutually connected and are respectively connected with the oil return filter. The working device emergency dropping system is characterized in that a ball valve is connected between the hydraulically controlled multi-way valve and the governor valve, and the ball valve is further connected with the oil return filter. The working device emergency dropping system of the diesel fork lift truck overcomes the defects in the prior art, eliminates potential accidents, and meets requirements of safe operations.
Description
Technical field
The utility model relates to the emergent decline system of a kind of diesel fork lift truck equipment, belongs to the diesel fork lift truck technical field.
Background technology
At present, the internal combustion counterbalanced weight fork truck equipment decline system control principle of the dosing control multiway valve of selling on the market as shown in Figure 1, filter links to each other with hydraulic reservoir, first gear type pump is cascaded with second gear type pump and links to each other with filter, second gear type pump links to each other with the hydraulic control multiway valve, and first gear type pump links to each other with priority valve, safety valve, and safety valve links to each other with hydraulic reservoir, priority valve links to each other with the hydraulic control multiway valve, and hydraulic control multiway valve, priority valve all connect hydraulic reservoir by the oil return filter.The hydraulic control multiway valve connects two lift oil tanks by governor valve respectively, and two lift oil tanks are cascaded and link to each other with the oil return filter.
The principle of work of above-mentioned traditional diesel fork lift truck equipment decline system is: promote the descending operation handle by the movement of priority valve control hydraulic control multiway valve main valve plug, piston bottom and the oil circuit between the hydraulic reservoir of lift oil tank are connected, because the deadweight of piston rod, goods shelf, pallet fork etc., piston begin to descend.In the case, regulated by governor valve through the oil return speed of hydraulic control multiway valve hydraulic return fuel tank.
There is following shortcoming in tradition diesel fork lift truck equipment decline system: when engine off, priority valve can not be given by fuel feeding in the first gear type pump source of running out of steam, or after first gear type pump of hydraulic efficiency pressure system etc. itself goes wrong, guide's oil circuit just can not be controlled the movement of hydraulic control multiway valve main valve plug, also just can not conducting lift oil tank piston bottom and hydraulic reservoir between path, so equipment also can not be realized the function that descends.When hydraulic control multiway valve and governor valve have damage, can not keep ortho states or the speed limit function of equipment, operating personal or other personnel process below equipment are arranged, the unexpected decline of equipment will bring hidden danger to personal safety.
The utility model content
The technical problems to be solved in the utility model provides a kind of emergent decline system of diesel fork lift truck equipment that can satisfy the safe operation requirement.
In order to solve the problems of the technologies described above, the technical solution of the utility model provides the emergent decline system of a kind of diesel fork lift truck equipment, comprise hydraulic reservoir, first gear type pump is connected to each other with second gear type pump and all links to each other with hydraulic reservoir by filter, second gear type pump links to each other with the hydraulic control multiway valve, first gear type pump links to each other with priority valve, safety valve, and safety valve links to each other with hydraulic reservoir; Priority valve links to each other with the hydraulic control multiway valve, and hydraulic control multiway valve, priority valve all connect hydraulic reservoir by the oil return filter; The hydraulic control multiway valve respectively connects two lift oil tanks by governor valve, and two lift oil tanks are connected to each other and all link to each other with the oil return filter, it is characterized in that: be connected ball valve between described hydraulic control multiway valve and the governor valve, ball valve also links to each other with the oil return filter.
A kind of diesel fork lift truck equipment that the utility model provides decline system of meeting an urgent need, at ordinary times, ball valve is in closed condition.When engine off, or after first gear type pump of hydraulic efficiency pressure system etc. itself goes wrong, perhaps when hydraulic control multiway valve and governor valve have damage, operating personal can move down the ball valve hand switch, piston bottom and the oil circuit between the hydraulic reservoir of lift oil tank are connected, oil return this moment is no longer passed through the hydraulic control multiway valve but is directly got back to hydraulic reservoir by ball valve, and owing to the deadweight of piston rod, goods shelf, pallet fork etc., piston begins to descend.Park or keep in repair diesel fork lift truck this moment again, safer, eliminated accident potential.
The emergent decline system of a kind of diesel fork lift truck equipment that the utility model provides has overcome the deficiencies in the prior art, has eliminated accident potential, satisfies the requirement of safe operation.
Description of drawings
Fig. 1 is traditional diesel fork lift truck equipment decline system control principle scheme drawing;
The emergent decline system of a kind of diesel fork lift truck equipment control principle scheme drawing that Fig. 2 provides for the utility model.
The specific embodiment
For the utility model is become apparent, now with a preferred embodiment, and conjunction with figs. is described in detail below.
The emergent decline system of a kind of diesel fork lift truck equipment control principle scheme drawing that Fig. 2 provides for the utility model, the emergent decline system of described a kind of diesel fork lift truck equipment is on the basis of the emergent decline system of traditional diesel fork lift truck equipment shown in Figure 1, add a ball valve between hydraulic control multiway valve and governor valve, ball valve links to each other with the oil return filter.
At ordinary times, ball valve is in closed condition.When engine off, or after first gear type pump of hydraulic efficiency pressure system etc. itself goes wrong, perhaps when hydraulic control multiway valve and governor valve have damage, operating personal can move down the ball valve hand switch, piston bottom and the oil circuit between the hydraulic reservoir of lift oil tank are connected, oil return this moment is no longer passed through the hydraulic control multiway valve but is directly got back to hydraulic reservoir by ball valve, and owing to the deadweight of piston rod, goods shelf, pallet fork etc., piston begins to descend.Park or keep in repair diesel fork lift truck this moment again, safer, eliminated accident potential.
Claims (1)
1. the emergent decline system of a diesel fork lift truck equipment, comprise hydraulic reservoir, first gear type pump is connected to each other with second gear type pump and all links to each other with hydraulic reservoir by filter, second gear type pump links to each other with the hydraulic control multiway valve, first gear type pump links to each other with priority valve, safety valve, and safety valve links to each other with hydraulic reservoir; Priority valve links to each other with the hydraulic control multiway valve, and hydraulic control multiway valve, priority valve all connect hydraulic reservoir by the oil return filter; The hydraulic control multiway valve respectively connects two lift oil tanks by governor valve, and two lift oil tanks are connected to each other and all link to each other with the oil return filter, it is characterized in that: be connected ball valve between described hydraulic control multiway valve and the governor valve, ball valve also links to each other with the oil return filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712046 CN203033727U (en) | 2012-12-20 | 2012-12-20 | Working device emergency dropping system of diesel fork lift truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220712046 CN203033727U (en) | 2012-12-20 | 2012-12-20 | Working device emergency dropping system of diesel fork lift truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203033727U true CN203033727U (en) | 2013-07-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220712046 Expired - Fee Related CN203033727U (en) | 2012-12-20 | 2012-12-20 | Working device emergency dropping system of diesel fork lift truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203033727U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110345136A (en) * | 2018-04-06 | 2019-10-18 | 雷蒙德股份有限公司 | Auxiliary circuit filtration system and method |
| CN110697636A (en) * | 2018-02-10 | 2020-01-17 | 金福珍 | Forklift truck |
-
2012
- 2012-12-20 CN CN 201220712046 patent/CN203033727U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110697636A (en) * | 2018-02-10 | 2020-01-17 | 金福珍 | Forklift truck |
| CN110745743A (en) * | 2018-02-10 | 2020-02-04 | 金福珍 | Forklift and working method thereof |
| CN110345136A (en) * | 2018-04-06 | 2019-10-18 | 雷蒙德股份有限公司 | Auxiliary circuit filtration system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20171220 |