CN104386615A - Composite cylinder speed reduction loop of lifting machine - Google Patents
Composite cylinder speed reduction loop of lifting machine Download PDFInfo
- Publication number
- CN104386615A CN104386615A CN201410475732.6A CN201410475732A CN104386615A CN 104386615 A CN104386615 A CN 104386615A CN 201410475732 A CN201410475732 A CN 201410475732A CN 104386615 A CN104386615 A CN 104386615A
- Authority
- CN
- China
- Prior art keywords
- composite cylinder
- valve
- lifting machine
- fluid port
- hydraulic fluid
- 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
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Classifications
-
- 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
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
-
- 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
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
-
- 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
- B66F2700/00—Lifting apparatus
- B66F2700/05—Hydraulic jacks
Abstract
The invention discloses a composite cylinder speed reduction loop of a lifting machine, and belongs to the field of hydraulic transmission. The composite cylinder speed reduction loop comprises an oil tank, a hydraulic pump, an overflow valve, a reversing valve, a composite cylinder, a composite cylinder boss, a composite cylinder concave table and a one-way speed regulating valve. The overflow valve and an oil returning pipe of the reversing valve are connected with the oil tank; the composite cylinder is composed of the composite cylinder boss and the composite cylinder concave table; an oil opening A of the reversing valve is connected with an oil opening A of the composite cylinder; an oil opening B of the reversing valve is divided into two paths; one branch is connected with an oil opening C of the composite cylinder; and the other branch is in series connection with the one-way speed regulating valve and then is connected with the oil opening B of the composite cylinder. The composite cylinder speed reduction loop solves the problem that in the working process of an existing lifting machine, motion of an execution element is becomes slow from rapid on the premise that the flow of the hydraulic pump has to be changed, and consequently operation is inconvenient and has the advantages of being simple in structure, reasonable in design and easy to manufacture.
Description
Technical field
The invention belongs to hydrostatic drive field, more particularly, relate to a kind of deceleration loop of lifting machine hydraulic efficiency pressure system.
Background technology
Along with the development of automobile industry, vehicle maintenance and repair becomes an emerging industry gradually with maintenance.Wherein lifting machine is as the important tool in vehicle maintenance and 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 drive and hydrostatic drive according to type 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 hydrostatic drive lifting machine safety performance good, operate steadily, easy to maintenance and work efficiency is high, be current lifting machine transmission use mainstream type.For the hydraulic efficiency pressure system of lifting machine, hydraulic actuating cylinder because of need of work usually slow down, to make simple operation.And utilize controllable capacity pump, realize slowing down by the flow changing Hydraulic Pump, be not generally used because it has increased substantially cost.
Summary of the invention
For existing lifting machine in the course of the work, can not under the prerequisite not changing Hydraulic Pump flow, the motion of power element is made to be at a slow speed by rapid translating, cause unhandy problem, the invention provides a kind of lifting machine composite cylinder deceleration loop, replace traditional hydraulic actuating cylinder by composite cylinder, carry out the deceleration of power element.
For solving the problem, the present invention adopts following technical scheme.
A kind of lifting machine composite cylinder deceleration loop, comprise fuel tank, Hydraulic Pump, by pass valve, change-over valve, composite cylinder, composite cylinder boss, composite cylinder concave station, one-way speed-regulating valve, the import oil pipe of described Hydraulic Pump is connected with fuel tank, outlet oil pipe respectively with by pass valve, change-over valve is connected, described by pass valve is connected fuel tank with the oil return pipe of change-over valve, described composite cylinder is by composite cylinder boss, composite cylinder concave station forms, the A hydraulic fluid port of described change-over valve is connected with the A hydraulic fluid port of composite cylinder, its B hydraulic fluid port is divided into two branch roads, article one, branch road is connected with the C hydraulic fluid port of composite cylinder, be connected with the B hydraulic fluid port of composite cylinder after another branch road series connection one-way speed-regulating valve.
Described change-over valve is three-position four-way electromagnetic directional valve, and its Median Function is O type.
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention is by by utilizing composite cylinder to replace traditional hydraulic actuating cylinder, has carried out the deceleration of power element, and stretches into the length in cylinder by adjustment composite cylinder boss, changes the stroke of rate conversion, makes operation more convenient.
(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-Hydraulic Pump, 3-by pass valve, 4-change-over valve, 5-composite cylinder, 51-composite cylinder boss, 52-composite cylinder concave station, 6-one-way speed-regulating valve.
Detailed description of the invention
Describe the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, lifting machine composite cylinder deceleration loop comprises fuel tank 1, Hydraulic Pump 2, by pass valve 3, change-over valve 4, composite cylinder 5, composite cylinder boss 51, composite cylinder concave station 52, one-way speed-regulating valve 6, the import oil pipe of described Hydraulic Pump 2 is connected with fuel tank 1, outlet oil pipe respectively with by pass valve 3, change-over valve 4 is connected, described by pass valve 3 is connected fuel tank 1 with the oil return pipe of change-over valve 4, described composite cylinder 5 is by composite cylinder boss 51, composite cylinder concave station 52 forms, the A hydraulic fluid port of described change-over valve 4 is connected with the A hydraulic fluid port of composite cylinder 5, its B hydraulic fluid port is divided into two branch roads, article one, branch road is connected with the C hydraulic fluid port of composite cylinder 5, be connected with the B hydraulic fluid port of composite cylinder 5 after another branch road series connection one-way speed-regulating valve 6.
Described change-over valve 4 is three-position four-way electromagnetic directional valve, and its Median Function is O type.
embodiment 1
As shown in Figure 1, lifting machine composite cylinder deceleration loop comprises fuel tank 1, Hydraulic Pump 2, by pass valve 3, change-over valve 4, composite cylinder 5, composite cylinder boss 51, composite cylinder concave station 52, one-way speed-regulating valve 6, the import oil pipe of described Hydraulic Pump 2 is connected with fuel tank 1, outlet oil pipe respectively with by pass valve 3, change-over valve 4 is connected, described by pass valve 3 is connected fuel tank 1 with the oil return pipe of change-over valve 4, described composite cylinder 5 is by composite cylinder boss 51, composite cylinder concave station 52 forms, the A hydraulic fluid port of described change-over valve 4 is connected with the A hydraulic fluid port of composite cylinder 5, its B hydraulic fluid port is divided into two branch roads, article one, branch road is connected with the C hydraulic fluid port of composite cylinder 5, be connected with the B hydraulic fluid port of composite cylinder 5 after another branch road series connection one-way speed-regulating valve 6.
Described change-over valve 4 is three-position four-way electromagnetic directional valve, and its Median Function is O type, and described by pass valve 3 is direct-acting overflow valve.
Claims (2)
1. a lifting machine composite cylinder deceleration loop, comprise fuel tank (1), Hydraulic Pump (2), by pass valve (3), change-over valve (4), composite cylinder (5), composite cylinder boss (51), composite cylinder concave station (52), one-way speed-regulating valve (6), it is characterized in that, the import oil pipe of described Hydraulic Pump (2) is connected with fuel tank (1), outlet oil pipe respectively with by pass valve (3), change-over valve (4) is connected, described by pass valve (3) is connected fuel tank (1) with the oil return pipe of change-over valve (4), described composite cylinder (5) is by composite cylinder boss (51), composite cylinder concave station (52) forms, the A hydraulic fluid port of described change-over valve (4) is connected with the A hydraulic fluid port of composite cylinder (5), its B hydraulic fluid port is divided into two branch roads, article one, branch road is connected with the C hydraulic fluid port of composite cylinder (5), another branch road series connection one-way speed-regulating valve (6) is connected with the B hydraulic fluid port of composite cylinder (5) afterwards.
2. lifting machine composite cylinder deceleration loop according to claim 1, is characterized in that, described change-over valve (4) is three-position four-way electromagnetic directional valve, and its Median Function is O type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475732.6A CN104386615A (en) | 2014-09-18 | 2014-09-18 | Composite cylinder speed reduction loop of lifting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410475732.6A CN104386615A (en) | 2014-09-18 | 2014-09-18 | Composite cylinder speed reduction loop of lifting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104386615A true CN104386615A (en) | 2015-03-04 |
Family
ID=52604599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410475732.6A Pending CN104386615A (en) | 2014-09-18 | 2014-09-18 | Composite cylinder speed reduction loop of lifting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104386615A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863910A (en) * | 2015-05-24 | 2015-08-26 | 南京理工大学 | Heavy long rod hoisting mechanism hydraulic system and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203214478U (en) * | 2013-04-01 | 2013-09-25 | 浙江工商职业技术学院 | Automatic pressure compensating circuit |
| CN203248453U (en) * | 2013-04-24 | 2013-10-23 | 浙江工商职业技术学院 | Stroke deceleration loop device |
| CN203272291U (en) * | 2013-05-10 | 2013-11-06 | 浙江工商职业技术学院 | Workpiece feeding rapid unloading loop |
| CN203272289U (en) * | 2013-05-09 | 2013-11-06 | 浙江工商职业技术学院 | Electromagnetic unloading loop device |
| CN203272288U (en) * | 2013-05-09 | 2013-11-06 | 浙江工商职业技术学院 | Quick pressure regulating loop device |
-
2014
- 2014-09-18 CN CN201410475732.6A patent/CN104386615A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203214478U (en) * | 2013-04-01 | 2013-09-25 | 浙江工商职业技术学院 | Automatic pressure compensating circuit |
| CN203248453U (en) * | 2013-04-24 | 2013-10-23 | 浙江工商职业技术学院 | Stroke deceleration loop device |
| CN203272289U (en) * | 2013-05-09 | 2013-11-06 | 浙江工商职业技术学院 | Electromagnetic unloading loop device |
| CN203272288U (en) * | 2013-05-09 | 2013-11-06 | 浙江工商职业技术学院 | Quick pressure regulating loop device |
| CN203272291U (en) * | 2013-05-10 | 2013-11-06 | 浙江工商职业技术学院 | Workpiece feeding rapid unloading loop |
Non-Patent Citations (1)
| Title |
|---|
| 张利平: "三腔复合缸在液压系统中的新应用", 《液压气动与密封》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104863910A (en) * | 2015-05-24 | 2015-08-26 | 南京理工大学 | Heavy long rod hoisting mechanism hydraulic system and control method |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150304 |
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| WD01 | Invention patent application deemed withdrawn after publication |