CN203333206U - Anti-overload control system of foldable arm-type lorry-mounted crane - Google Patents
Anti-overload control system of foldable arm-type lorry-mounted crane Download PDFInfo
- Publication number
- CN203333206U CN203333206U CN2013203828753U CN201320382875U CN203333206U CN 203333206 U CN203333206 U CN 203333206U CN 2013203828753 U CN2013203828753 U CN 2013203828753U CN 201320382875 U CN201320382875 U CN 201320382875U CN 203333206 U CN203333206 U CN 203333206U
- Authority
- CN
- China
- Prior art keywords
- valve
- rodless cavity
- pressure
- cylinder
- control system
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a lorry-mounted crane, and in particular discloses an anti-overload control system of a foldable arm-type lorry-mounted crane. The anti-overload control system comprises a force moment valve, a movable arm cylinder, a lifting arm cylinder, a telescopic cylinder and a multi-way reversing valve, wherein a C1 outlet, a C2 outlet and a C3 outlet are formed in the force moment valve and are respectively connected with the rod cavity of the movable arm cylinder, the rod cavity of the lifting arm cylinder and the rodless cavity of the telescopic cylinder; pressure detection openings are respectively formed in the rodless cavity of the movable arm cylinder, an overflow valve spring on the force moment valve and the rod cavity of the movable arm cylinder. When the pressure of the rodless cavity of the movable arm cylinder is greater than the sum of the pressure of the rod cavity and the pressure of the spring, the rod cavity of the movable arm cylinder and the rodless cavity of the telescopic cylinder are controlled to be opened under the action of the multi-way reversing valve, and an oil liquid in the rodless cavity of the lifting arm cylinder can return to an oil box under the action of an unloading valve. The anti-overload control system can be used for effectively preventing the lorry-mounted crane from being overloaded.
Description
Technical field
The utility model relates to a kind of foldable arm lorry-mounted crane, particularly relates to a kind of antioverloading control system of foldable arm lorry-mounted crane.
Background technology
The domestic present any protection system that all do not increase of foldable arm lorry-mounted crane; though exercises are combined by oil cylinder; there is certain antioverloading function, but this function of can scattering and disappearing under certain operating mode, for the safety of complete machine, still have certain hidden danger.When overload appears in lorry-mounted crane, car load there will be tumbles, and easily causes personnel's injures and deaths, and each framing member of lorry-mounted crane is used for a long time under the overload operating mode simultaneously, not only makes its framing member easily damage, and greatly reduces the life-span of lorry-mounted crane.
The utility model content
The utility model, for solving an above-mentioned difficult problem, provides a kind of and can effectively prevent that the antioverloading control system of the foldable arm lorry-mounted crane of overload phenomenon from appearring in lorry-mounted crane.
The antioverloading control system of foldable arm lorry-mounted crane of the present utility model, comprise boom cylinder, the arm oil cylinder, telescopic oil cylinder and multiple directional control valve, also comprise the moment valve, establish the C1 outlet on described moment valve, C2 outlet and C3 outlet, and the C1 on described moment valve, C2, C3 outlet respectively with the rod chamber of boom cylinder, the rod chamber of arm oil cylinder, the rodless cavity of telescopic oil cylinder is connected, establish the pressure monitoring mouth on the rodless cavity of described boom cylinder, described moment valve comprises unloader valve and by pass valve, described by pass valve upper spring place establishes the pressure monitoring mouth, the rod chamber oil circuit of described boom cylinder is established the pressure monitoring mouth, when the rodless cavity pressure of described boom cylinder is greater than described rod chamber pressure and spring pressure sum, control the rod chamber of boom cylinder by multiple directional control valve, the rodless cavity oil circuit of telescopic oil cylinder is opened, the fluid of the rodless cavity of described arm oil cylinder is got back to fuel tank by unloader valve.
The pressure monitoring mouth of the rodless cavity of described boom cylinder oil circuit is by the pressure sensor detected pressures.
The pressure monitoring mouth of described rod chamber oil circuit is by the pressure sensor detected pressures.
Described by pass valve upper spring is by the pressure sensor detected pressures.
The beneficial effects of the utility model compared with prior art:
1, effectively prevent tumbling of car load;
2, prevent that the overload phenomenon from appearring in lorry-mounted crane, not only extended the life-span of product, also increased the protection to the user simultaneously, realize that people-oriented.
The accompanying drawing explanation
Fig. 1 is the principle schematic of the antioverloading control system of the utility model foldable arm lorry-mounted crane.
The specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present utility model is described in further detail.Following examples are used for the utility model is described, but are not used for limiting scope of the present utility model.
As shown in Figure 1, a kind of antioverloading control system of foldable arm lorry-mounted crane, comprise moment valve 1, boom cylinder 2, arm oil cylinder 3, telescopic oil cylinder 4 and multiple directional control valve 5, establish the C1 outlet on moment valve 1, C2 outlet and C3 outlet, and the C1 on moment valve 1, C2, C3 outlet respectively with the rod chamber of boom cylinder 2, the rod chamber of arm oil cylinder 3, the rodless cavity of telescopic oil cylinder 4 is connected, establish Pil pressure monitoring mouth on the rodless cavity of boom cylinder 3, the pressure monitoring mouth place of the rodless cavity of boom cylinder 3 arranges pressure sensor, moment valve 1 comprises unloader valve 12 and by pass valve 11, by pass valve 11 upper spring places establish Pil pressure monitoring mouth, the Pil pressure monitoring mouth place pressure sensor of moment valve 1, the rod chamber oil circuit of boom cylinder 2 is established Pil pressure monitoring mouth, the Pil pressure monitoring mouth place of the rod chamber of boom cylinder 2 arranges pressure sensor, when the rodless cavity pressure of boom cylinder 2 is greater than rod chamber pressure and spring pressure sum, control the rod chamber of boom cylinder 2 by multiple directional control valve 5, the rodless cavity oil circuit of telescopic oil cylinder 4 is opened, the fluid of the rodless cavity of arm oil cylinder 3 is got back to fuel tank by unloader valve 12.
Concrete principle is: by the rodless cavity pressure of Pil pressure monitoring mouth monitoring boom cylinder 2, when pressure surpasses the rod chamber pressure of the spring of by pass valve 11 and boom cylinder 2, by pass valve 11 is opened, in on-state, unloader valve 12 is by by pass valve 11 hold-off pressures, then open unloader valve 12 main roads, make multiple directional control valve 5 remove the rod chamber of boom cylinder 2, the rodless cavity of telescopic oil cylinder 4, the fluid of the rodless cavity of arm oil cylinder 3 is got back to fuel tank by unloader valve 12, thereby having limited the outer of car load center of gravity moves, prevent that car load from tumbling, closing by the pressure signal of RS mouth of unloader valve 12, now telescopic oil cylinder 4 rod chamber oil-feeds, in the car load center of gravity, move.
The above is only preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvement and modification, these improve and modification also should be considered as protection domain of the present utility model.
Claims (4)
1. the antioverloading control system of foldable arm lorry-mounted crane, comprise boom cylinder, the arm oil cylinder, telescopic oil cylinder and multiple directional control valve, it is characterized in that: also comprise the moment valve, establish the C1 outlet on described moment valve, C2 outlet and C3 outlet, and the C1 on described moment valve, C2, C3 outlet respectively with the rod chamber of boom cylinder, the rod chamber of arm oil cylinder, the rodless cavity of telescopic oil cylinder is connected, establish the pressure monitoring mouth on the rodless cavity of described boom cylinder, described moment valve comprises unloader valve and by pass valve, described by pass valve upper spring place establishes the pressure monitoring mouth, the rod chamber oil circuit of described boom cylinder is established the pressure monitoring mouth, when the rodless cavity pressure of described boom cylinder is greater than described rod chamber pressure and spring pressure sum, control the rod chamber of boom cylinder by multiple directional control valve, the rodless cavity oil circuit of telescopic oil cylinder is opened, the fluid of the rodless cavity of described arm oil cylinder is got back to fuel tank by unloader valve.
2. the antioverloading control system of foldable arm lorry-mounted crane as claimed in claim 1 is characterized in that: the pressure monitoring mouth of the rodless cavity of described boom cylinder oil circuit is by the pressure sensor detected pressures.
3. the antioverloading control system of foldable arm lorry-mounted crane as claimed in claim 1 is characterized in that: the pressure monitoring mouth of described rod chamber oil circuit is by the pressure sensor detected pressures.
4. the antioverloading control system of foldable arm lorry-mounted crane as claimed in claim 1 is characterized in that: described by pass valve upper spring is by the pressure sensor detected pressures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203828753U CN203333206U (en) | 2013-07-01 | 2013-07-01 | Anti-overload control system of foldable arm-type lorry-mounted crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203828753U CN203333206U (en) | 2013-07-01 | 2013-07-01 | Anti-overload control system of foldable arm-type lorry-mounted crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203333206U true CN203333206U (en) | 2013-12-11 |
Family
ID=49701897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203828753U Expired - Fee Related CN203333206U (en) | 2013-07-01 | 2013-07-01 | Anti-overload control system of foldable arm-type lorry-mounted crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203333206U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337124A (en) * | 2017-08-17 | 2017-11-10 | 中联重科股份有限公司 | Crane and its arm of derrick control method and control system |
-
2013
- 2013-07-01 CN CN2013203828753U patent/CN203333206U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107337124A (en) * | 2017-08-17 | 2017-11-10 | 中联重科股份有限公司 | Crane and its arm of derrick control method and control system |
| CN107337124B (en) * | 2017-08-17 | 2019-04-19 | 中联重科股份有限公司 | Crane and its arm of derrick control method and control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102588365A (en) | Double-cylinder synchronous control hydraulic system and engineering machinery | |
| CN203333206U (en) | Anti-overload control system of foldable arm-type lorry-mounted crane | |
| CN201737609U (en) | Simple moment limit device | |
| CN202682624U (en) | Side plate flipping type fire-fighting sandbox | |
| CN204490382U (en) | Folding arm lorry-mounted crane fluid control moment limiting system | |
| CN208363050U (en) | A kind of bottom-shaft type trash rack for barrage | |
| CN201250070Y (en) | Overload warning device of lorry-mounted crane | |
| CN203572671U (en) | Manual chain hoist testbed | |
| CN204114294U (en) | Remote control Quick-closing check valve | |
| CN202897883U (en) | Engineering machinery, and arm descending safety control system of suspension arm thereof | |
| CN205858810U (en) | A kind of hydraulic system at disjunctor case compression power station | |
| CN205334129U (en) | But self -checking formula safety carpet controller | |
| CN202007085U (en) | Double-beam cantilever crane | |
| CN207684367U (en) | Pack feeding device | |
| CN203582281U (en) | Lifting hook as well as crane with same | |
| CN208252479U (en) | A kind of anticollision cylinder control system and engineering machinery | |
| CN205827580U (en) | A kind of can be with the well lid collet of perception well lid displacement | |
| CN205500633U (en) | Proportion type divides regional stability control torque limiter system | |
| CN204125086U (en) | A kind of new-type hoisting hydraulic system | |
| CN203926175U (en) | The controlled dual-speed hydraulic device of a kind of pressure relay | |
| CN203079460U (en) | Hoister overload protection device | |
| CN204372239U (en) | A kind of safety check | |
| CN203067394U (en) | Oil cylinder balance valve, arm support oil cylinder control system and engineering machine | |
| CN204938770U (en) | A kind of dual normally closed weight upper limit stroke protecting device | |
| CN201967409U (en) | Hanging type flowerpot |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 046012 mailbox, Changzhi, Shanxi, 6 Co-patentee after: CHINA ACADEMY OF LAUNCH VEHICLE TECHNOLOGY Patentee after: SHANXI AEROSPACE QINGHUA EQUIPMENT Co.,Ltd. Address before: 046012 mailbox, Changzhi, Shanxi, 6 Co-patentee before: China Academy of Launch Vehicle Technology Patentee before: CHANGZHI QINGHUA MACHINERY FACTORY |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131211 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |