CN102826492A - Slide bar control device and overhead working truck applying same - Google Patents
Slide bar control device and overhead working truck applying same Download PDFInfo
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- CN102826492A CN102826492A CN2012102829388A CN201210282938A CN102826492A CN 102826492 A CN102826492 A CN 102826492A CN 2012102829388 A CN2012102829388 A CN 2012102829388A CN 201210282938 A CN201210282938 A CN 201210282938A CN 102826492 A CN102826492 A CN 102826492A
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Abstract
The invention discloses a slide bar control device, which comprises a reversing valve, a blocking element and an executive component which are connected in sequence, wherein the executive component is connected with a pressure oil-way and an oil return oil-way through the reversing valve and the blocking element; an oil-way direction flowing through the executive component is changed by the reversing valve and the blocking element in a first state and in a second state to achieve the stretch and retraction of a slide bar, which is connected with the executive component, relative to a ladder bed; and an oil-ways access flowing through the executive component is locked by the reversing valve and the blocking element in a third state to achieve the locking of the slide bar relative to the ladder bed. As constituting components of the slide bar control device provided by the invention are standard components and are simple in structure, the slide bar control device is low in cost.
Description
Technical field
The present invention relates to a kind of slide bar control setup, relate in particular to a kind of slide bar control setup that is applied to aerial ladder class aerial platform.
Background technology
Please with reference to Fig. 1, the sliding hopper 10 that a kind of aerial ladder class aerial platform 1 comprises the ladder 11 of turntable 13, rotational fixation to turntable 13, slide on short transverse along ladder 11 and the handling device 14 of getting on the bus of control aerial platform normal operation.Please in the lump with reference to Fig. 2, the handling device 14 of getting on the bus comprises the 4th operating portion 144 that first operating portion 141, second operating portion 142, the 3rd operating portion 143 and control sliding hopper 10 slide up and down along ladder 11.When sliding hopper has slided into the lowermost end of ladder 11 for 10 times, still have certain height between the bottom surface of sliding hopper 10 and ground, the staff can easily not come out from sliding hopper 10.
To the problems referred to above, a kind of aerial platform as shown in Figure 32 is provided, this aerial platform 2 further comprises the slide bar 22 that links to each other with sliding hopper 20.Please in the lump with reference to Fig. 4, the handling device 24 of getting on the bus further comprises the 5th operating portion 245 of control slide bar 22 relative ladder lifting/lowerings/stop.
The 5th operating portion 245 mainly is grouped into by main valve, pilot-actuated valve and electric control part, and above-mentioned each component part is non-standard component and complex structure, therefore causes the 5th operating portion 245 and comprises that handling device 24 costs of getting on the bus of the 5th operating portion 245 are higher.
Therefore, be necessary to provide a kind of slide bar control setup, to address the above problem.
Summary of the invention
The technical matters that the present invention mainly solves provides a kind of lower-cost slide bar control setup and uses the aerial platform of this slide bar control setup.
For solving the problems of the technologies described above; The technical scheme that the present invention adopts is: provide a kind of slide bar control setup to comprise bonded assembly change-over valve, blocking element and power element successively; Power element is through change-over valve and blocking element and connect pressure oil circuit and oil return circuit; Change-over valve and blocking element change the oil circuit direction of the power element of flowing through under first state and second state; Drive elongation and the withdrawal of slide bar with respect to ladder with control actuating component, change-over valve and blocking element lock the oil circuit path of the power element of flowing through under the third state, to realize the locking of slide bar with respect to ladder.
Wherein, change-over valve comprises first reverse valve oil head, second reverse valve oil head, the 3rd reverse valve oil head and the 4th reverse valve oil head, and first reverse valve oil head is communicated with the pressure oil circuit, and second reverse valve oil head is communicated with oil return circuit; Blocking element comprises first blocking element and second blocking element; First blocking element comprises the first blocking element hydraulic fluid port, the second blocking element hydraulic fluid port and first control port; Second blocking element comprises the 3rd blocking element hydraulic fluid port, the 4th blocking element hydraulic fluid port and second control port; First blocking element hydraulic fluid port to the second blocking element hydraulic fluid port keeps forward conduction and is communicated with the 3rd reverse valve oil head; The 3rd blocking element hydraulic fluid port to the four blocking element hydraulic fluid ports keep forward conduction and are communicated with the 4th reverse valve oil head, and first control port connects the 3rd reverse valve oil head, and second control port connects the 4th reverse valve oil head; Power element comprises the first power element hydraulic fluid port and the second power element hydraulic fluid port, and the first power element hydraulic fluid port is communicated with the second blocking element hydraulic fluid port, and the second power element hydraulic fluid port is communicated with the 4th blocking element hydraulic fluid port; Change-over valve is communicated with first reverse valve oil head under first state with the 3rd reverse valve oil head; Second reverse valve oil head is communicated with the 4th reverse valve oil head; And control the reverse-conducting of the 3rd blocking element hydraulic fluid port to the four blocking element hydraulic fluid ports through first control port; And then thereby fluid formation forward loop drive power element is moved along first direction; Change-over valve is communicated with first reverse valve oil head under second state with the 4th reverse valve oil head; Second reverse valve oil head is communicated with the 3rd reverse valve oil head; And control the reverse-conducting of first blocking element hydraulic fluid port to the second blocking element hydraulic fluid port through second control port, thereby and then make fluid form the return circuit to drive the power element edge second direction opposite and move with first direction, change-over valve all links to each other the 3rd reverse valve oil head with the 4th reverse valve oil head under the third state with second reverse valve oil head; The reverse-conducting of first blocking element hydraulic fluid port to the second blocking element hydraulic fluid port and the 3rd blocking element hydraulic fluid port to the four blocking element hydraulic fluid ports is closed, thereby makes power element keep locking.
Wherein, the slide bar control setup further comprises the governor valve that is connected between the pressure oil circuit and first reverse valve oil head.
Wherein, The slide bar control setup further comprises the oil pressure feedback system; The oil pressure feedback system comprises first shuttle valve and second shuttle valve; First shuttle valve comprises the first input end and second input end that connects the first blocking element hydraulic fluid port and the 3rd blocking element hydraulic fluid port respectively and first mouth that is used to export first comparative result, and second shuttle valve comprises and connects first mouth respectively and with reference to the 3rd input end of hydraulic circuit and four-input terminal and second mouth that is used to export second comparative result.
Wherein, the slide bar control setup further comprises oil pump, and oil pump connects second mouth, and regulates the delivery pressure of oil pump according to second comparative result.
Wherein, blocking element is balance cock or hydraulic lock.
Wherein, power element is hydraulic actuating cylinder or motor.
For solving the problems of the technologies described above, another technical scheme that the present invention adopts is: a kind of aerial platform, the slide bar that comprises ladder, slides along ladder, be fixed in sliding hopper and aforesaid slide bar control setup on the slide bar.
Wherein, Aerial platform further comprises car body, is arranged on the turntable on the car body and the handling device of getting on the bus; Ladder is arranged on the turntable; With flexible, the slide bar control setup is independent of the handling device of getting on the bus to rotation and the ladder that the handling device of getting on the bus is used to control the relative car body of turntable with respect to the luffing of turntable.
Wherein, get on the bus shared pressure oil circuit of handling device and slide bar control setup and oil return circuit.
The invention has the beneficial effects as follows: compared with prior art, the element of slide bar control setup of the present invention is gauge member and simple in structure, so cost is lower.
Description of drawings
Fig. 1 is a kind of partial schematic diagram of existing aerial platform;
Fig. 2 is the handling device of getting on the bus of aerial platform shown in Figure 1;
Fig. 3 is the partial schematic diagram of another kind of existing aerial platform;
Fig. 4 is the handling device of getting on the bus of aerial platform shown in Figure 3;
Fig. 5 is a first embodiment of the invention slide bar control setup and the scheme drawing that is connected of the handling device of getting on the bus;
Fig. 6 is the scheme drawing of slide bar control setup shown in Figure 5;
Fig. 7 is a second embodiment of the invention slide bar control setup and the scheme drawing that is connected of the handling device of getting on the bus;
Fig. 8 is the scheme drawing of slide bar control setup shown in Figure 7.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is elaborated.
Please with reference to Fig. 5 and Fig. 6, first embodiment of the invention slide bar control setup 3 comprises bonded assembly change-over valve 31, blocking element 32 and power element 33 successively.Power element 33 is connected pressure oil circuit P1 and oil return circuit T1 through blocking element 32 with change-over valve 31.
Change-over valve 31 and blocking element 32 change the oil circuit direction of power element 33 under first state and second state, drive elongation and the withdrawal of slide bars (not shown) with respect to ladder (not shown) with control actuating component 33.Change-over valve 31 and blocking element 32 lock the oil circuit of power element 33 under the third state, to realize the locking of slide bar with respect to ladder.
Change-over valve 31, blocking element 32 and power element 33 all can adopt cost gauge member lower, simple in structure, not only can reduce the manufacturing cost of slide bar control setup 3, and conveniently replace, are convenient to safeguard.
Specifically, change-over valve 31 is three position four-way directional control valves, and it comprises the first reverse valve oil head A1, the second reverse valve oil head A2, the 3rd reverse valve oil head A3 and the 4th reverse valve oil head A4.The first reverse valve oil head A1 is communicated with pressure oil circuit P1, and the second reverse valve oil head A2 is communicated with oil return circuit T1.
Wherein, first blocking element hydraulic fluid port C1 to the second blocking element hydraulic fluid port C2 keeps forward conduction and is communicated with the 3rd reverse valve oil head A3; The 3rd blocking element hydraulic fluid port C3 to the four blocking element hydraulic fluid port C4 keep forward conduction and are communicated with the 4th reverse valve oil head A4.The first control port C6 connects the 3rd reverse valve oil head A3, and the second control port C5 connects the 4th reverse valve oil head A4.
Change-over valve 31 is communicated with the first reverse valve oil head A1 under first state with the 3rd reverse valve oil head A3; The second reverse valve oil head A2 is communicated with the 4th reverse valve oil head A4; And control the reverse-conducting of the 3rd blocking element hydraulic fluid port C3 to the four blocking element hydraulic fluid port C4, thereby and then make fluid form forward loop to drive power element 33 and move along first direction through the first control port C6.
Change-over valve 31 is communicated with the first reverse valve oil head A1 under second state with the 4th reverse valve oil head A4; The second reverse valve oil head A2 is communicated with the 3rd reverse valve oil head A3; And control the reverse-conducting of first blocking element hydraulic fluid port C1 to the second blocking element hydraulic fluid port C2, thereby and then make fluid form the return circuit to drive the power element 33 edges second direction opposite and move with first direction through the second control port C5.
Change-over valve 31 all links to each other the 3rd reverse valve oil head A3 with the 4th reverse valve oil head A4 under the third state with the second reverse valve oil head A2; Promptly the 3rd reverse valve oil head A3 and the 4th reverse valve oil head A4 all are communicated with oil return circuit T1; The reverse-conducting of the reverse-conducting of the 3rd blocking element hydraulic fluid port C3 to the four blocking element hydraulic fluid port C4 and first blocking element hydraulic fluid port C1 to the second blocking element hydraulic fluid port C2 is closed, thereby makes power element 33 keep lock-out state.
In the present embodiment, blocking element 32 is two balance cock groups that parallelly connected balance cock constitutes, and wherein first blocking element 321 and second blocking element 322 are respectively balance cock.The first control port C6 is communicated with second blocking element 322; Under first state; The fluid that the pressure oil circuit provides is flowed through and is arrived the 4th blocking element hydraulic fluid port C4 behind the first blocking element hydraulic fluid port C1, the second blocking element hydraulic fluid port C2, the first power element hydraulic fluid port E1, the second power element hydraulic fluid port E2; Under the combined action of the oil liquid pressure at the 4th blocking element hydraulic fluid port C4 place and the first control port C6; Fluid is along the 3rd blocking element hydraulic fluid port C3 to the four blocking element hydraulic fluid port C4 reverse-conductings, and then makes fluid form forward loop to drive power element 33 and move along first direction.
Second state through change-over valve 31 with pressure oil circuit P1 link to each other with the 3rd blocking element hydraulic fluid port C3, oil return circuit T1 links to each other with the first blocking element hydraulic fluid port C1, so the flow direction of oil circuit is opposite with the first state lower direction; Its principle of work is identical with first state, no longer makes a concrete analysis of at this.
Under the third state; Cut off the pressure oil circuit through change-over valve 31 and given blocking element 32 and power element 33 fuel feeding; Therefore the combined action of the first control port C6 and the 4th blocking element hydraulic fluid port C4 can't be opened the reverse-conducting of the 3rd blocking element hydraulic fluid port C3 to the four blocking element hydraulic fluid port C4; And the combined action of the second control port C5 and the second blocking element hydraulic fluid port C2 can't be opened the reverse-conducting of first blocking element hydraulic fluid port C1 to the second blocking element hydraulic fluid port C2, can not form the fluid path in the slide bar control setup 3, therefore; It is motionless that power element keeps, and then locked by the also relative ladder of slide bar that power element drives.
In order to guarantee that the oil circuit in the slide bar control setup 3 has pressure stable, between the pressure oil circuit P1 and the first reverse valve oil head A1, connect governor valve 34.Governor valve 34 not only makes in the slide bar control setup 3 of normal working oil pressure stable and then power element 33 kinematic velocitys are remained unchanged.
3 independent and handling device 5 settings of getting on the bus of present embodiment slider operating device, and the two shared oil circuit.Slider operating device 3 further comprises oil pressure feedback system 35, and oil pressure feedback system 35 is used to regulate the delivery pressure of oil circuit.
Oil pressure feedback system 35 comprises first shuttle valve 351 and second shuttle valve 352.First shuttle valve 351 comprises the first input end G1 and second input end G2 that is connected to the first blocking element hydraulic fluid port C1 and the 3rd blocking element hydraulic fluid port C3 respectively and the first mouth G5 that is used to export first comparative result.Second shuttle valve 352 comprises the 3rd input end G3 that is connected to the first mouth G5 and the comparison oil pressure in the handling device 5 of getting on the bus respectively and four-input terminal G4 and the second mouth G6 that is used to export second comparative result.Wherein, the get on the bus comparison oil pressure of handling device 5 is the required maximum functional oil pressure of each operating unit (indicating) of handling device 5 of getting on the bus.Thereby the maximum functional oil pressure of the handling device 5 of getting on the bus and the maximum oil pressure ratio of slider operating device 3 are fed back to the maxim in the two and pressure oil circuit P1 bonded assembly oil pump (not shown) through oil pressure feedback system 35.
The second mouth G6 connects oil pump 36, and regulates the delivery pressure of oil pump, the i.e. oil pressure of pressure oil circuit P1 according to second comparative result; Slider operating device 3 is worked under desirable pressure, be of value to the service life of Hydraulic Elements in the prolongation system, Hydraulic Elements are blocking element 32, power element 33 for example.
The power element 33 of present embodiment slider operating device 3 is motors, and motor drives belt to drive slide bar.In the practical application, power element 33 is not limited to motor, can be anyly can drive element/device that slide bar stretches out with respect to ladder or withdraws.
Please with reference to Fig. 7 and Fig. 8, second embodiment of the invention slide bar control setup 4 is connected with the handling device 6 of getting on the bus.Slide bar control setup 4 comprises change-over valve 41, blocking element 42, power element 43, governor valve 44, oil pressure feedback system 45.The first reverse valve oil head B1 of change-over valve 41 links to each other with oil return circuit T2 with pressure oil circuit P2 respectively with the second reverse valve oil head B2.
Different with the first embodiment slide bar control setup 3 is that blocking element 42 is hydraulic lock in the present embodiment.
The first control port D6 and the first blocking element hydraulic fluid port D1 are connected, and the second control port D5 and the 3rd blocking element hydraulic fluid port D3 are connected.Under first state, the first blocking element hydraulic fluid port D1 is communicated with pressure oil circuit P2, and then the first control port D6 opens the reverse-conducting of the 3rd blocking element D3 to the four blocking element D4, drives power element 43 and moves along first direction thereby fluid forms forward loop.
Under second state; The 3rd blocking element hydraulic fluid port D3 is communicated with pressure oil circuit P2; Then the second control port D5 opens the reverse-conducting of first blocking element D1 to the second blocking element D2, and the second direction opposite with first direction moved thereby fluid forms drive power element 43 edges, return circuit.
Under the third state; The first blocking element hydraulic fluid port D1 and the 3rd blocking element hydraulic fluid port D3 all are communicated with oil return circuit T2; The first control port D6 can't open the reverse-conducting of second blocking element 422; The second control port D5 also can't open the reverse-conducting of first blocking element 421, thereby makes power element 43 keep locking.
The invention has the beneficial effects as follows: compared with prior art; The change-over valve 31,41 of slide bar control setup 3,4 of the present invention; Blocking element 32,42; And power element 33,43 all can adopt cost gauge member lower, simple in structure, not only can reduce the manufacturing cost of slide bar control setup 3,4, and conveniently replaces, is convenient to safeguard.
The present invention further provides a kind of aerial platform (not shown) of application of aforementioned slider operating device 3,4.The slide bar (not shown) that aerial platform further comprises ladder (not shown), slide along ladder and the sliding hopper (not shown) of slide bar slip relatively.Slide bar is controlled with respect to the slider operating device 3,4 that slides through of ladder.
Aerial platform also comprises car body (not shown), is arranged on the turntable (not shown) on the car body and the handling device 5,6 of getting on the bus.Ladder is arranged on the turntable.The handling device 5,6 of getting on the bus be used to control turntable with respect to the rotation of car body and ladder with respect to the luffing of turntable and action such as flexible.The slide bar control setup is independent of the handling device of getting on the bus; And the two shared pressure oil circuit P1, P2 and oil return circuit T1, T2.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification sheets of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (10)
1. slide bar control setup; It is characterized in that; Said slide bar control setup comprises bonded assembly change-over valve, blocking element and power element successively; Said power element is connected pressure oil circuit and oil return circuit through said change-over valve with said blocking element, and said change-over valve and said blocking element change the oil circuit direction of the said power element of flowing through under first state and second state, drives slide bar stretching out and withdraw with respect to ladder with control actuating component; Said change-over valve and said blocking element lock the oil circuit path of the said power element of flowing through under the third state, to realize the locking of said slide bar with respect to said ladder.
2. slide bar control setup as claimed in claim 1 is characterized in that,
Said change-over valve comprises first reverse valve oil head, second reverse valve oil head, the 3rd reverse valve oil head and the 4th reverse valve oil head, and said first reverse valve oil head is communicated with said pressure oil circuit, and said second reverse valve oil head is communicated with said oil return circuit;
Said blocking element comprises first blocking element and second blocking element; Said first blocking element comprises the first blocking element hydraulic fluid port, the second blocking element hydraulic fluid port and first control port; Said second blocking element comprises the 3rd blocking element hydraulic fluid port, the 4th blocking element hydraulic fluid port and second control port; The said first blocking element hydraulic fluid port to the said second blocking element hydraulic fluid port keeps forward conduction and is communicated with said the 3rd reverse valve oil head; Said the 3rd blocking element hydraulic fluid port to said the 4th blocking element hydraulic fluid port keeps forward conduction and is communicated with said the 4th reverse valve oil head; Said first control port connects said the 3rd reverse valve oil head, and said second control port connects said the 4th reverse valve oil head;
Said power element comprises the first power element hydraulic fluid port and the second power element hydraulic fluid port, and the said first power element hydraulic fluid port is communicated with the said second blocking element hydraulic fluid port, and the said second power element hydraulic fluid port is communicated with said the 4th blocking element hydraulic fluid port;
Said change-over valve is communicated with said first reverse valve oil head under said first state with said the 3rd reverse valve oil head; Said second reverse valve oil head is communicated with said the 4th reverse valve oil head; And control said the 3rd blocking element hydraulic fluid port to the reverse-conducting of said the 4th blocking element hydraulic fluid port through said first control port; Thereby and then make fluid form forward loop to drive said power element and move along first direction; Said change-over valve is communicated with said first reverse valve oil head under said second state with said the 4th reverse valve oil head; Said second reverse valve oil head is communicated with said the 3rd reverse valve oil head; And control the said first blocking element hydraulic fluid port to the reverse-conducting of the said second blocking element hydraulic fluid port through said second control port; Thereby and then make fluid form the return circuit to drive the said power element edge second direction opposite and move with said first direction; Said change-over valve all links to each other said the 3rd reverse valve oil head with said the 4th reverse valve oil head under the said third state with said second reverse valve oil head, the reverse-conducting of the said first blocking element hydraulic fluid port to said second blocking element hydraulic fluid port and said the 3rd blocking element hydraulic fluid port to said the 4th blocking element hydraulic fluid port is closed, thereby makes said power element keep locking.
3. slide bar control setup as claimed in claim 2 is characterized in that, said slide bar control setup further comprises the governor valve that is connected between said pressure oil circuit and said first reverse valve oil head.
4. slide bar control setup as claimed in claim 2; It is characterized in that; Said slide bar control setup further comprises the oil pressure feedback system; Said oil pressure feedback system comprises first shuttle valve and second shuttle valve; Said first shuttle valve comprises the first input end and second input end that connects said first blocking element hydraulic fluid port and the 3rd blocking element hydraulic fluid port respectively and first mouth that is used to export first comparative result, and said second shuttle valve comprises and connects said first mouth respectively and with reference to the 3rd input end of hydraulic circuit and four-input terminal and second mouth that is used to export second comparative result.
5. slide bar control setup as claimed in claim 4 is characterized in that, said slide bar control setup further comprises oil pump, and said oil pump connects said second mouth, and regulates the delivery pressure of oil pump according to said second comparative result.
6. slide bar control setup as claimed in claim 1 is characterized in that, said blocking element is balance cock or hydraulic lock.
7. slide bar control setup as claimed in claim 1 is characterized in that, said power element is hydraulic actuating cylinder or motor.
8. aerial platform, the slide bar that comprises ladder, slides along said ladder, be fixed on the said slide bar sliding hopper and like any described slide bar control setup of claim 1-7.
9. aerial platform as claimed in claim 8; It is characterized in that; Said aerial platform further comprises car body, is arranged on the turntable on the car body and the handling device of getting on the bus; Said ladder is arranged on the said turntable, and with flexible, said slide bar control setup is independent of the said handling device of getting on the bus to rotation and the said ladder that the said handling device of getting on the bus is used to control the said relatively car body of said turntable with respect to the luffing of said turntable.
10. aerial platform as claimed in claim 9 is characterized in that, said handling device and shared said pressure oil circuit of said slide bar control setup and the said oil return circuit of getting on the bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282938.8A CN102826492B (en) | 2012-08-09 | 2012-08-09 | Slide bar control device and overhead working truck applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210282938.8A CN102826492B (en) | 2012-08-09 | 2012-08-09 | Slide bar control device and overhead working truck applying same |
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| Publication Number | Publication Date |
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| CN102826492A true CN102826492A (en) | 2012-12-19 |
| CN102826492B CN102826492B (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210282938.8A Active CN102826492B (en) | 2012-08-09 | 2012-08-09 | Slide bar control device and overhead working truck applying same |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113792U (en) * | 1992-02-11 | 1992-08-26 | 李耀诚 | Automatic aerial fire and rescue vehicle |
| JPH04367671A (en) * | 1991-06-14 | 1992-12-18 | Nippon Kikai Kogyo Kk | Remote controller of ladder-truck lifter |
| JPH10306673A (en) * | 1997-03-07 | 1998-11-17 | Morita:Kk | Ladder car |
| CN2588103Y (en) * | 2002-11-26 | 2003-11-26 | 张勇 | Energy-saving self-locking hydraulic controlled one direction multi-way change valve |
| CN201604624U (en) * | 2010-01-25 | 2010-10-13 | 徐工集团工程机械股份有限公司建设机械分公司 | Tow type concrete pump and hydraulic control system of landing legs thereof |
| CN201826745U (en) * | 2010-05-31 | 2011-05-11 | 丑纪行 | Hydraulic aerial ladder for moving house |
| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
-
2012
- 2012-08-09 CN CN201210282938.8A patent/CN102826492B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04367671A (en) * | 1991-06-14 | 1992-12-18 | Nippon Kikai Kogyo Kk | Remote controller of ladder-truck lifter |
| CN2113792U (en) * | 1992-02-11 | 1992-08-26 | 李耀诚 | Automatic aerial fire and rescue vehicle |
| JPH10306673A (en) * | 1997-03-07 | 1998-11-17 | Morita:Kk | Ladder car |
| CN2588103Y (en) * | 2002-11-26 | 2003-11-26 | 张勇 | Energy-saving self-locking hydraulic controlled one direction multi-way change valve |
| CN201604624U (en) * | 2010-01-25 | 2010-10-13 | 徐工集团工程机械股份有限公司建设机械分公司 | Tow type concrete pump and hydraulic control system of landing legs thereof |
| CN201826745U (en) * | 2010-05-31 | 2011-05-11 | 丑纪行 | Hydraulic aerial ladder for moving house |
| CN102518610A (en) * | 2011-12-15 | 2012-06-27 | 常德中联重科液压有限公司 | Motor control loop and control valve |
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| CN102826492B (en) | 2014-12-17 |
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Address after: 410200 No. 997, Section 2, Tengfei Road, Wangcheng District, Changsha City, Hunan Province Patentee after: Hunan Zoomlion emergency equipment Co., Ltd Address before: 410200 No. 997, Jinxing Avenue, Wangcheng District, Changsha City, Hunan Province Patentee before: Changsha Zhonglian fire fighting Machinery Co., Ltd |