CN203064020U - Telescopic arm forklift hydraulic system - Google Patents
Telescopic arm forklift hydraulic system Download PDFInfo
- Publication number
- CN203064020U CN203064020U CN 201220732149 CN201220732149U CN203064020U CN 203064020 U CN203064020 U CN 203064020U CN 201220732149 CN201220732149 CN 201220732149 CN 201220732149 U CN201220732149 U CN 201220732149U CN 203064020 U CN203064020 U CN 203064020U
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- China
- Prior art keywords
- plunger pump
- pump
- hydraulic
- working
- telescopic arm
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- 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.)
- Expired - Fee Related
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model discloses a telescopic arm forklift hydraulic system which comprises a hydraulic oil tank, a first plunger pump, a reversing valve, a hydraulic motor, a steering braking system, a working system, an electromagnetic switching valve and a second plunger pump. The first plunger pump and the second plunger pump are communicated with the hydraulic oil tank. The first plunger pump is connected with the hydraulic motor through the reversing valve, and the second plunger pump is connected with the steering braking system and the working system. The electromagnetic switching valve is connected with an outlet of the second plunger pump and a variable displacement mechanism. The telescopic arm forklift hydraulic system has the advantages that a plunger pump which is directly controlled by two-point-form variables is used for replacing a working pump and a steering braking pump, so that the number of the pumps of the telescopic arm forklift hydraulic system is decreased from three to two, under an off-working state, the pump is in a high-pressure small-displacement state and supplies oil to a steering system and a braking system, and in the process of working, the pump is in a large-displacement state and supplies oil to the working system. Therefore, the telescopic arm forklift hydraulic system is beneficial to reducing system energy loss and improving power utilization rate.
Description
Technical field
The utility model relates to a kind of hydraulic efficiency pressure system, specifically is a kind of telescopic boom fork truck hydraulic efficiency pressure system, belongs to telescopic boom fork truck Hydraulic Field.
Background technology
The telescopic boom fork truck is the Multi Loading and Unloading Functions combination with the telescopic arm structure of car hosit and traditional fork truck, is used for the wheeled mobile robot of portage, transfer.The telescopic boom fork truck mainly contains hydraulic transmission and two kinds of forms of hydrostatic drive at present.Hydraulic transmission telescopic boom fork truck hydraulic efficiency pressure system comprises steering hydraulic system, hydraulic braking system and hydraulic system of working, this system comprises two Hydraulic Pumps: the working barrel that turn to, brake system shares a Hydraulic Pump and is used for work system, two Hydraulic Pumps are generally the string pump, even the braking in a turn pump also is in the high-pressure work state when work system is worked always, working barrel was not in big flow low pressure unloading condition when work system was not worked, because this system's heating of throttling action is bigger.Hydrostatic drive telescopic boom fork truck hydraulic efficiency pressure system comprises vibration hydraulic system, braking in a turn hydraulic efficiency pressure system and hydraulic system of working, and this type systematic comprises three Hydraulic Pumps at present: the special-purpose walking Hydraulic Pump of running gear, braking in a turn system share a Hydraulic Pump and the special-purpose Hydraulic Pump of work system.Three Hydraulic Pumps are the string pump, similar with the hydraulic transmission hydraulic efficiency pressure system, even the braking in a turn pump also is in the high-pressure work state when work system is worked always, working barrel was not in the low pressure unloading condition when work system was not worked, in running order or the big flow unloading condition of walking pump, system's heating is big, degradation of energy is many because throttling action causes in this system.
Summary of the invention
At the problem that above-mentioned prior art exists, the utility model provides a kind of telescopic boom fork truck hydraulic efficiency pressure system, reduces degradation of energy, improves power utilization.
To achieve these goals, the technical solution adopted in the utility model is: a kind of telescopic boom fork truck hydraulic efficiency pressure system, comprise: hydraulic reservoir, first plunger pump, change-over valve, HM Hydraulic Motor, braking in a turn system, work system, electromagnetic switch valve and second plunger pump, described first plunger pump and second plunger pump are communicated with hydraulic reservoir, first plunger pump is connected by change-over valve and HM Hydraulic Motor, second plunger pump and braking in a turn system and work system are connected, and electromagnetic switch valve connects second plunger delivery side of pump and the stroking mechanism.
The beneficial effects of the utility model are: use a directly actuated plunger pump of two-point form variable to replace working barrel and braking in a turn pump, make telescopic boom fork truck hydraulic efficiency pressure system be kept to two pumps by three pumps, this pump is in high pressure float amount steering swivel system and brake system fuel feeding under the off working state, being in big discharge capacity during work is the work system fuel feeding, help to have reduced system energy loss, improve power utilization.
Description of drawings
Fig. 1 is the utility model telescopic boom fork truck hydraulic system principle figure.
Among the figure: 1, hydraulic reservoir; 2, first plunger pump; 3, change-over valve; 4, HM Hydraulic Motor; 5, braking in a turn system; 6, work system; 7, electromagnetic switch valve; 8, second plunger pump.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of telescopic boom fork truck hydraulic efficiency pressure system, comprise hydraulic reservoir 1, first plunger pump 2, walking change-over valve 3, running motor 4, braking in a turn system 5, work system 6, electromagnetic switch valve 7 and second plunger pump 8, first plunger pump 2 and second plunger pump 8 are communicated with hydraulic reservoir 1, first plunger pump 2 is connected by change-over valve 3 and HM Hydraulic Motor 4, second plunger pump 8 is connected with braking in a turn system 5 and work system 6, and electromagnetic switch valve 7 connects outlet and the stroking mechanism of second plunger pump 8.
Claims (2)
1. telescopic boom fork truck hydraulic efficiency pressure system, it is characterized in that comprising hydraulic reservoir, first plunger pump, change-over valve, HM Hydraulic Motor, braking in a turn system, work system, electromagnetic switch valve and second plunger pump, described first plunger pump and second plunger pump are communicated with hydraulic reservoir, first plunger pump is connected by change-over valve and HM Hydraulic Motor, second plunger pump and braking in a turn system and work system are connected, and electromagnetic switch valve connects second plunger delivery side of pump and the stroking mechanism.
2. a kind of telescopic boom fork truck hydraulic efficiency pressure system according to claim 1 is characterized in that second plunger pump is that the two-point form variable is directly controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220732149 CN203064020U (en) | 2012-12-27 | 2012-12-27 | Telescopic arm forklift hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220732149 CN203064020U (en) | 2012-12-27 | 2012-12-27 | Telescopic arm forklift hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203064020U true CN203064020U (en) | 2013-07-17 |
Family
ID=48762838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220732149 Expired - Fee Related CN203064020U (en) | 2012-12-27 | 2012-12-27 | Telescopic arm forklift hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203064020U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086558A (en) * | 2019-12-26 | 2020-05-01 | 北汽福田汽车股份有限公司 | Hydraulic power-assisted steering system, control method and engineering vehicle |
| CN114940465A (en) * | 2022-05-31 | 2022-08-26 | 徐州徐工特种工程机械有限公司 | Electric telescopic arm forklift |
-
2012
- 2012-12-27 CN CN 201220732149 patent/CN203064020U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111086558A (en) * | 2019-12-26 | 2020-05-01 | 北汽福田汽车股份有限公司 | Hydraulic power-assisted steering system, control method and engineering vehicle |
| CN114940465A (en) * | 2022-05-31 | 2022-08-26 | 徐州徐工特种工程机械有限公司 | Electric telescopic arm forklift |
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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 |
Granted publication date: 20130717 Termination date: 20191227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |