CN104314895A - Reversing valve type unloading loop for scissor lift - Google Patents
Reversing valve type unloading loop for scissor lift Download PDFInfo
- Publication number
- CN104314895A CN104314895A CN201410476276.7A CN201410476276A CN104314895A CN 104314895 A CN104314895 A CN 104314895A CN 201410476276 A CN201410476276 A CN 201410476276A CN 104314895 A CN104314895 A CN 104314895A
- Authority
- CN
- China
- Prior art keywords
- selector valve
- valve
- hydraulic pump
- reversing valve
- oil hydraulic
- 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.)
- Pending
Links
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/065—Scissor linkages, i.e. X-configuration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
-
- 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
Abstract
The invention discloses a reversing valve type unloading loop for a scissor lift, and belongs to the field of hydraulic drive. The unloading loop comprises an oil tank, a hydraulic pump, an overflow valve, a reversing valve and a hydraulic cylinder, wherein the inlet oil pipe of the hydraulic pump is connected with the oil tank, and the outlet oil pipe of the hydraulic pump is connected with the overflow valve and the reversing valve respectively; the oil return pipes of the overflow valve and the reversing valve are connected with the oil tank; the hydraulic cylinder is connected to the reversing valve. According to the unloading loop, the problem of an influence on the service life of the hydraulic pump and a motor due to frequent starting and stopping of the hydraulic pump during short-time inoperation of executive components of an existing scissor lift is solved; the unloading loop has the advantages of simple structure, reasonable design and simplicity for manufacture.
Description
Technical field
The invention belongs to hydraulic transmission field, more particularly, relate to a kind of relief circuit of lifting machine hydraulic system.
Background technique
Along with the development of automobile industry, auto repair becomes an emerging industry gradually with maintenance.Wherein lifting machine is as the important tool in auto repair and servicing operations, have also been obtained and develops faster.Automobile is mainly brought up to another safe altitude from a safe altitude by lifting machine, so that manual operation and maintenance.Current lifting machine has a lot of type, can be divided into mechanical transmission and hydraulic transmission according to the kind of drive.Mechanical transmission structure is simple, low price, but lifting weight is restricted, and leading screw or work nut slide fastener easily occur, and there is larger potential safety hazard.And hydraulic transmission lifting machine Safety performance good, operate steadily, easy to maintenance and working efficiency is high, be current lifting machine transmission use mainstream type.For the hydraulic system of shearing type lifter, when its executive component short time quits work, do not need input hydraulic pressure oil, if now take the method for stop solution press pump to carry out the input of stop solution force feed, the life-span of oil hydraulic pump and motor can be affected because of start and stop frequently.For this reason, adopt relief circuit allow oil hydraulic pump off-load, make it with the running of very little output power, thus avoid start and stop frequently.
Summary of the invention
For existing shearing type lifter executive component when the short time quits work, the problem of oil hydraulic pump and electrical machinery life is affected because of frequent start-stop oil hydraulic pump, the invention provides the relief circuit of a kind of shearing type lifter selector valve, utilize the Median Function of selector valve to realize the off-load of oil hydraulic pump, thus avoid the frequent start-stop of oil hydraulic pump.
For solving the problem, the present invention adopts following technological scheme.
The relief circuit of a kind of shearing type lifter selector valve, comprise fuel tank, oil hydraulic pump, relief valve, selector valve, oil hydraulic cylinder, the import oil pipe of described oil hydraulic pump is connected with fuel tank, outlet oil pipe is connected with relief valve, selector valve respectively, described relief valve is connected fuel tank with the return tube of selector valve, and described oil hydraulic cylinder is connected on selector valve.
Described selector valve is three-position four-way electromagnetic directional valve, and the Median Function of described selector valve is M type.
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention utilizes the Median Function of selector valve to realize the off-load of oil hydraulic pump, makes oil hydraulic pump in non-stop-machine situation, can operate with very little power, and exports the pressure oil compared with small flow, improves the working life of oil hydraulic pump and motor.
(2) structure of the present invention is simple, reasonable in design, is easy to manufacture.
Accompanying drawing explanation
Fig. 1 is hydraulic scheme of the present invention.
In figure: 1-fuel tank, 2-oil hydraulic pump, 3-relief valve, 4-selector valve, 5-oil hydraulic cylinder.
Embodiment
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, the relief circuit of shearing type lifter selector valve comprises fuel tank 1, oil hydraulic pump 2, relief valve 3, selector valve 4, oil hydraulic cylinder 5, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with relief valve 3, selector valve 4 respectively, described relief valve 3 is connected fuel tank 1 with the return tube of selector valve 4, and described oil hydraulic cylinder 5 is connected on selector valve 4.
Described selector valve 4 is three-position four-way electromagnetic directional valve, and the Median Function of described selector valve 4 is M type.
embodiment 1
As shown in Figure 1, the relief circuit of shearing type lifter selector valve comprises fuel tank 1, oil hydraulic pump 2, relief valve 3, selector valve 4, oil hydraulic cylinder 5, the import oil pipe of described oil hydraulic pump 2 is connected with fuel tank 1, outlet oil pipe is connected with relief valve 3, selector valve 4 respectively, described relief valve 3 is connected fuel tank 1 with the return tube of selector valve 4, and described oil hydraulic cylinder 5 is connected on selector valve 4.
Described selector valve 4 is three-position four-way electromagnetic directional valve, and the Median Function of described selector valve 4 is M type, and described relief valve 3 is direct-acting overflow valve.
Claims (3)
1. shearing type lifter selector valve relief circuit, comprise fuel tank (1), oil hydraulic pump (2), relief valve (3), selector valve (4), oil hydraulic cylinder (5), it is characterized in that, the import oil pipe of described oil hydraulic pump (2) is connected with fuel tank (1), outlet oil pipe is connected with relief valve (3), selector valve (4) respectively, described relief valve (3) is connected fuel tank (1) with the return tube of selector valve (4), and described oil hydraulic cylinder (5) is connected on selector valve (4).
2. shearing type lifter selector valve according to claim 1 relief circuit, is characterized in that, described selector valve (4) is three-position four-way electromagnetic directional valve.
3. shearing type lifter selector valve according to claim 1 and 2 relief circuit, is characterized in that, the Median Function of described selector valve (4) is M type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476276.7A CN104314895A (en) | 2014-09-18 | 2014-09-18 | Reversing valve type unloading loop for scissor lift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410476276.7A CN104314895A (en) | 2014-09-18 | 2014-09-18 | Reversing valve type unloading loop for scissor lift |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104314895A true CN104314895A (en) | 2015-01-28 |
Family
ID=52370178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410476276.7A Pending CN104314895A (en) | 2014-09-18 | 2014-09-18 | Reversing valve type unloading loop for scissor lift |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104314895A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367488A (en) * | 2008-09-02 | 2009-02-18 | 芜湖市银鸿液压件有限公司 | Hydraulic lifting apparatus |
| CN203500149U (en) * | 2013-09-22 | 2014-03-26 | 西安志越机电科技有限公司 | Hydraulic system used for hole milling and clamping device of connecting rod |
-
2014
- 2014-09-18 CN CN201410476276.7A patent/CN104314895A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101367488A (en) * | 2008-09-02 | 2009-02-18 | 芜湖市银鸿液压件有限公司 | Hydraulic lifting apparatus |
| CN203500149U (en) * | 2013-09-22 | 2014-03-26 | 西安志越机电科技有限公司 | Hydraulic system used for hole milling and clamping device of connecting rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104314894A (en) | Pressure relay type unloading loop for scissor lift | |
| CN104235092A (en) | Unilateral throttling synchronism loop of dual-column gantry lifting machine | |
| CN104196806A (en) | Synchronizing circuit of flow distributing and collecting valve for two-column gantry lifter | |
| CN103801751B (en) | Based on the fully-automatic plate shearing machine hydraulic system that PLC controls | |
| CN104235107A (en) | Shear-type lifting machine bypass reversing valve unloading loop | |
| CN104295545A (en) | Differential speed increasing loop for gantry hoist | |
| CN203845759U (en) | Automatic-leveling hydraulic device of scissor lift | |
| CN104196782A (en) | Serially-connected composite throttling speed regulating loop for lifter | |
| CN204020051U (en) | Rapid forge press return device of rapid and rapid forge press | |
| CN104405706A (en) | Double-pump relief circuit of scissor lift | |
| CN104314895A (en) | Reversing valve type unloading loop for scissor lift | |
| CN104235105A (en) | Gantry lifter serial connection speed conversion loop | |
| CN104386618A (en) | Pressure compensating unloading loop of shearing type lifting machine | |
| CN104675772A (en) | Load sensitive control hydraulic system | |
| CN104386616A (en) | Relief circuit with unloading relief valve for scissor lift | |
| CN103352880B (en) | For the hydraulic system of elevator | |
| CN104295544A (en) | Overflow valve unloading circuit of scissor lift | |
| CN204729399U (en) | A kind of coiled tubing pipe guide device hydraulic driving system | |
| CN204628110U (en) | A kind of car lift deceleration pressure dwelling loop | |
| CN204591827U (en) | A kind of shearing type lifter pressure compensation pressurize relief circuit | |
| CN104196780A (en) | Speed regulating loop for lifter outlet overflow throttling valve | |
| CN104235108A (en) | Accelerating loop of gantry lifter accelerating cylinder | |
| CN203144016U (en) | Ultrahigh voltage electric hydraulic pump station | |
| CN203978968U (en) | Plastic deformation squeezes the hydraulic system of forging molding equipment | |
| CN104196805A (en) | Two-level pressure regulating loop for lifter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |