CN201923828U - High-altitude operation truck real-time leveling control system with locking function - Google Patents
High-altitude operation truck real-time leveling control system with locking function Download PDFInfo
- Publication number
- CN201923828U CN201923828U CN2010206522159U CN201020652215U CN201923828U CN 201923828 U CN201923828 U CN 201923828U CN 2010206522159 U CN2010206522159 U CN 2010206522159U CN 201020652215 U CN201020652215 U CN 201020652215U CN 201923828 U CN201923828 U CN 201923828U
- Authority
- CN
- China
- Prior art keywords
- brake
- leveling
- cylinder
- control system
- brake cylinder
- 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
- Forklifts And Lifting Vehicles (AREA)
Abstract
The utility model discloses a high-altitude operation truck real-time leveling control system with a locking function, which comprises a leveling balance component, a locking component and an automatic control system. The balance component includes a leveling cylinder, an upper connecting rod, a lower connecting rod and a bracket; the locking component includes a hoop type brake component and a brake cylinder for driving the hoop type brake component; and the automatic control system includes an angle sensor, a central controller and a hydraulic system for providing driving force to the leveling cylinder and the brake cylinder. The leveling cylinder and the brake cylinder are controlled by the automatic control system, an operating platform is leveled and locked in real time, and the high-altitude operation truck real-time leveling control system has higher control precision and control sensitivity, is capable of rapidly and continuously leveling the operating platform in real time according to various working conditions of high-altitude operation machinery in high-altitude operation, is also capable of locking the operating platform by the aid of the locking component in emergency to ensure safety of high-altitude operators, and is simple in structure and convenient in operation.
Description
Technical field
The utility model relates to a kind of construction machinery and equipment annex machinery, particularly a kind of safety component that is used for the machinery of aloft work.
Background technology
Aloft work machinery (aerial platform) is widely used in the aloft work of industries such as boats and ships, building, urban construction, fire-fighting, port cargo as an important component part of engineering machinery field.Aloft work is that the carriage level that the mechanical arm by aloft work machinery will be equipped with operating personal or freight container is delivered to the high-altitude and carried out corresponding construction operation; In the entire job process, need the maintenance level could guarantee that based on the workplatform of carriage entire job carries out smoothly; And in this area, estimating an aerial platform product key factor qualified and that can use is exactly the automatic leveling capability of workplatform, also is to guarantee a normally key factor of safe operation of aerial platform.
In the present technology, have safe locking, continuous, real-time, self-levelling levelling gear, this leveling and auxiliary braking system are multiple functional, the automatic leveling when satisfying aloft work and the needs of safety performance.But, many, the complex structure of existing workplatform levelling gear annex, precision is low, low-response, discontinuous, hysteresis quality arranged because the existence of above problem can not in time stop, can causing comparatively serious safety misadventure in the leveling process; And because control accuracy, low-response and safety performance problem are difficult to satisfy the requirement of various forms of big height aloft work.
Therefore, need a kind of aloft work machinery automatic leveling device, simple in structure, control accuracy and control sensitieness are higher, can be according to the various operating modes of aloft work machinery when the aloft work, to workplatform make in real time, rapidly, continuously leveling action, and can under the situation of accident, guarantee aloft work personnel's safety, easy to operate.
The utility model content
In view of this, the purpose of this utility model provides a kind of real-time levelling control system of aerial platform with locking function, simple in structure, control accuracy and control sensitieness are higher, can be according to the various operating modes of aloft work machinery when the aloft work, to workplatform make in real time, rapidly, continuously leveling action, and can under the situation of accident, guarantee aloft work personnel's safety, easy to operate.
The real-time levelling control system of aerial platform with locking function of the present utility model comprises leveling balanced component, latch assembly and autonomous cruise speed system;
Described balanced component comprises leveling cylinder, boxed rod, lower link and carriage, described carriage is articulated in aloft work machinery upper arm by jointed shaft and forms lever construction, the resistance arm of lever construction is used for the erection work bucket, described boxed rod one end is articulated in aloft work machinery upper arm, the hinged successively formation rocker structure of the power arm of the other end and lower link and lever construction, described leveling cylinder one end is articulated in aloft work machinery upper arm, and the other end is articulated in boxed rod and is used for drive rocker mechanism;
Latch assembly comprises locking hood type brake assemblies and the brake cylinder that is used to drive the locking hood type brake assemblies, and described carriage and jointed shaft are in the circumferencial direction heavy keying fit, and two brake pads of locking hood type brake assemblies are wrapped in jointed shaft outward;
Described autonomous cruise speed system comprises angular transducer, central controller and is used to leveling cylinder and brake cylinder that the hydraulic efficiency pressure system of propulsive effort is provided, the angle signal that described angular transducer is arranged at carriage and gathers carriage is delivered to central process unit, and central process unit is according to giving an order signal to hydraulic efficiency pressure system.
Further, described aloft work machinery upper arm is a hollow structure, described latch assembly is positioned at the hollow structure of aloft work machinery upper arm, two brake pads of described locking hood type brake assemblies correspondence respectively are fixedly connected with brake rod, two brake rods are articulated in aloft work machinery upper arm respectively, and the piston rod of brake cylinder drives the drive end that is connected in two brake rods;
Further, outwards form the open wedge of expansion gradually between the drive end of two brake rods, described brake cylinder is positioned at brake rod drive end top, and its piston rod extends downwards and the end is provided with and the wedge of open wedge corresponding matching; Between the drive end bar section of two brake rods back-moving spring is set; The piston top of brake cylinder is provided for piston is applied the holddown spring of downward force, and the bottom is the hydraulic-driven chamber;
Further, between the two braking rod end surface of described wedge and formation open wedge ball is set respectively, the corresponding vertical ball grooves that is provided for holding ball of two braking rod end surface of wedge and formation open wedge with ball;
Further, described hydraulic efficiency pressure system comprises Hydraulic Pump, leveling electromagnetic proportional valve and brake cylinder electromagnetic valve, described Hydraulic Pump liquid outlet is connected in two epitrochoidal chambers of leveling cylinder by the leveling electromagnetic proportional valve, and described Hydraulic Pump liquid outlet is communicated in the hydraulic-driven chamber of brake cylinder by the brake cylinder electromagnetic valve;
The order output terminal of described central process unit connects the control circuit of leveling electromagnetic proportional valve and the control circuit of brake cylinder electromagnetic valve;
Further, on the liquid in-out pipeline of two epitrochoidal chambers of described leveling cylinder balance cock is set respectively, described balance cock comprises by pass valve parallel with one another and feed liquor check valve; , governor valve and backflow check valve in parallel are set on the hydraulic-driven chamber liquid in-out pipeline of brake cylinder;
Further, described ball is provided for the maintenance carriage that prevents that it from coming off.
The beneficial effects of the utility model are: the real-time levelling control system of aerial platform with locking function of the present utility model, adopt automatic controlling system leveling cylinder and brake cylinder, the leveling cylinder is used for adjusting work platform level according to the horizontal signal of autonomous cruise speed system detection and the action command of transmission, brake cylinder is locked bench board by latch assembly in real time according to the autonomous cruise speed system signal, have control accuracy and control sensitieness higher, can be according to the various operating modes of aloft work machinery when the aloft work, workplatform is made in real time, fast, continuous leveling action, and can be by latch assembly locking bench board under the situation of accident, guarantee aloft work personnel's safety, simple in structure, easy to operate.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the latch assembly structural representation;
Fig. 3 is the autonomous cruise speed system structural representation;
Fig. 4 is the utility model control principle block diagram.
The specific embodiment
Fig. 1 is a structural representation of the present utility model, Fig. 2 is the latch assembly structural representation, Fig. 3 is the autonomous cruise speed system structural representation, Fig. 4 is the utility model control principle block diagram, as shown in the figure: the real-time levelling control system of the aerial platform with locking function of present embodiment comprises leveling balanced component, latch assembly and autonomous cruise speed system;
Described balanced component comprises leveling cylinder 2, boxed rod 6, lower link 7 and carriage, described carriage is articulated in aloft work machinery upper arm 1 by jointed shaft 27 and forms lever construction, the resistance arm 4 of lever construction is used for erection work bucket 3, described boxed rod 6 one ends are articulated in aloft work machinery upper arm 1, the hinged successively formation rocker structure of the power arm 4a of the other end and lower link 7 and lever construction, described leveling cylinder 2 one ends are articulated in aloft work machinery upper arm 1, and the other end is articulated in boxed rod 6 and is used for drive rocker mechanism; In the present embodiment, leveling cylinder 2 cylinder bodies are articulated in aloft work machinery upper arm 1, and the piston rod end of leveling cylinder 2 directly is articulated in the interface point of boxed rod 6 and lower link 7, and is simple and compact for structure;
Latch assembly comprises the locking hood type brake assemblies and is used to drive the brake cylinder 8 of locking hood type brake assemblies, described carriage and jointed shaft 6 are in the circumferencial direction heavy keying fit, two brake pads, the 12 outer jointed shafts 6 that are wrapped in of locking hood type brake assemblies, just form less clearance between two brake pads 12 and the jointed shaft 6, drive the structure of braking by external force with the form of anchor ear;
Described autonomous cruise speed system comprises angular transducer 5, central controller 28 and is used to leveling cylinder 2 and brake cylinder 8 provides the hydraulic efficiency pressure system of propulsive effort, the angle signal that described angular transducer 5 is arranged at carriage and gathers carriage is delivered to central process unit 28, central process unit 28 according to the signal of giving an order to hydraulic efficiency pressure system and by HYDRAULIC CONTROL SYSTEM leveling cylinder 2 and brake cylinder 8.
In the present embodiment, described aloft work machinery upper arm 1 is a hollow structure, described latch assembly is positioned at the hollow structure of aloft work machinery upper arm 1, two brake pads 12 of described locking hood type brake assemblies correspondence respectively are fixedly connected with brake rod 11, two brake rods 11 are articulated in aloft work machinery upper arm 1 respectively, and the piston rod 8c of brake cylinder 8 drives the drive end that is connected in two brake rods 11; Present embodiment simple and compact for structure can not move interference, and it is smooth and easy to be beneficial to the operation that guarantees latch assembly.
In the present embodiment, outwards form the open wedge of expansion gradually between the drive end of two brake rods 11, described brake cylinder 8 is positioned at brake rod 11 drive ends top, and its piston rod 8c extends downwards and the end is provided with and the wedge 8d of open wedge corresponding matching; Between the drive end bar section of two brake rods 11 back-moving spring 14 is set; The piston 8b top of brake cylinder 8 is provided for piston 8b is applied the holddown spring 8a of downward force, and the bottom is the hydraulic-driven chamber; Adopt the structure of wedge 8d to drive, drive flexibly, simple in structure.
In the present embodiment, between two brake rods, 11 end faces of described wedge 8d and formation open wedge 11a ball 9 is set respectively, two brake rods, 11 end faces and the ball 9 corresponding vertical ball grooves that are provided for holding ball 9 of wedge 8d and formation open wedge 11a further increase the smooth and easy and alerting ability that mechanism moves.
In the present embodiment, described hydraulic efficiency pressure system comprises Hydraulic Pump 17, leveling electromagnetic proportional valve 20 and brake cylinder electromagnetic valve 15, and as shown in the figure, Hydraulic Pump 17 drives by motor 18; Described Hydraulic Pump 17 liquid outlets are connected in two epitrochoidal chambers of leveling cylinder 2 by leveling electromagnetic proportional valve 20, and described Hydraulic Pump 17 liquid outlets are communicated in the hydraulic-driven chamber of brake cylinder 8 by brake cylinder electromagnetic valve 15; The order output terminal of described central process unit 28 connects the control circuit 20a of leveling electromagnetic proportional valve 20 and the control circuit 15a of brake cylinder electromagnetic valve 15.
In the present embodiment, on the liquid in-out pipeline of two epitrochoidal chambers of described leveling cylinder 2 balance cock is set respectively, described balance cock comprises by pass valve parallel with one another 22 and feed liquor check valve 21, adopts the balance cock structure, is beneficial to simplify the pipeline setting, saves power source; Governor valve 26 and backflow check valve 25 in parallel are set on the hydraulic-driven chamber liquid in-out pipeline of brake cylinder 8; Backflow check valve 25 and governor valve 26 can make brake cylinder 8 glancing impacts be active in one's movements, and lag behind when declutching, and further guarantee safe effect.
In the present embodiment, described ball 9 is provided for the maintenance carriage 10 that prevents that it from coming off.
The utility model in use, the leveling cylinder links to each other with the leveling electromagnetic proportional valve through balance cock; Leveling electromagnetic proportional valve 20 inlets link to each other with Hydraulic Pump 17 by pump discharge check valve 24; By pass valve 19 is in parallel with Hydraulic Pump 17, the maximum pressure of control loop; Hydraulic Pump 17 is driven by motor 18.The outlet of Hydraulic Pump 17 links to each other with fuel tank 23 through oil filter 16; Leveling electromagnetic proportional valve 20 bypass outlets link to each other with fuel tank 23.Brake cylinder 8 is connected with pump discharge check valve 24 by brake cylinder electromagnetic valve 15; Brake cylinder electromagnetic valve 15 bypass outlets directly are communicated with fuel tank 23.
Aloft work machinery upper arm 1 drives carriage 4 when rotating and work bucket 3 rotates, angular transducer 5 on the carriage 4 detects work bucket 3 when not being horizontal, send detection signal to central controller, behind the central controller process information, send the control circuit of control signal to leveling electromagnetic proportional valve 20, regulate flow, control the flexible of leveling cylinder 2, thereby reach the effect of leveling.In process of rising or falling, if the leveling cylinder lost efficacy, control signal is promptly sent in effectively leveling and make the angle of work bucket and level attitude surpass setting value, and brake activation cylinder electromagnetic valve 15 makes latch assembly 8 lock jointed shafts, prevents to work on to struggle against to turn up; When the work bucket reaches the desired position, also can make auxiliary brake mechanism 8 lockings, by auxiliary brake mechanism locking jointed shaft, duplicate protection staff's safety.
When brake cylinder 8 under acting force of the spring; voussoir moves down; produce thrust by the brake rod 11 of steel ball 9 to both sides; the effect of the hinge-point 13 of two brake rods 11 by separately forces two brake linings 12 to hold jointed shaft tightly; prevent that jointed shaft from rotating; outwards overturn protection staff's safety thereby play the work bucket of preventing.During brake off, the brake cylinder electromagnetic valve 15 that links to each other with brake cylinder 8 replaces under the control of central controller, and toward brake cylinder 8 injection pressure oil, brake cylinder 8 contained springs compression this moment moves on the pulling wedge.And brake rod 11 also return under the effect of back-moving spring 14 restoring forces simultaneously, brake lining leaves jointed shaft.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (7)
1. the real-time levelling control system of aerial platform with locking function is characterized in that: comprise leveling balanced component, latch assembly and autonomous cruise speed system;
Described balanced component comprises leveling cylinder, boxed rod, lower link and carriage, described carriage is articulated in aloft work machinery upper arm by jointed shaft and forms lever construction, the resistance arm of lever construction is used for the erection work bucket, described boxed rod one end is articulated in aloft work machinery upper arm, the hinged successively formation rocker structure of the power arm of the other end and lower link and lever construction, described leveling cylinder one end is articulated in aloft work machinery upper arm, and the other end is articulated in boxed rod and is used for drive rocker mechanism;
Latch assembly comprises locking hood type brake assemblies and the brake cylinder that is used to drive the locking hood type brake assemblies, and described carriage and jointed shaft are in the circumferencial direction heavy keying fit, and two brake pads of locking hood type brake assemblies are wrapped in jointed shaft outward;
Described autonomous cruise speed system comprises angular transducer, central controller and is used to leveling cylinder and brake cylinder that the hydraulic efficiency pressure system of propulsive effort is provided, the angle signal that described angular transducer is arranged at carriage and gathers carriage is delivered to central process unit, and central process unit is according to giving an order signal to hydraulic efficiency pressure system.
2. the real-time levelling control system of aerial platform with locking function according to claim 1, it is characterized in that: described aloft work machinery upper arm is a hollow structure, described latch assembly is positioned at the hollow structure of aloft work machinery upper arm, two brake pads of described locking hood type brake assemblies correspondence respectively are fixedly connected with brake rod, two brake rods are articulated in aloft work machinery upper arm respectively, and the piston rod of brake cylinder drives the drive end that is connected in two brake rods.
3. the real-time levelling control system of aerial platform with locking function according to claim 2, it is characterized in that: form the open wedge that outwards enlarges gradually between the drive end of two brake rods, described brake cylinder is positioned at brake rod drive end top, and its piston rod extends downwards and the end is provided with and the wedge of open wedge corresponding matching; Between the drive end bar section of two brake rods back-moving spring is set; The piston top of brake cylinder is provided for piston is applied the holddown spring of downward force, and the bottom is the hydraulic-driven chamber.
4. the real-time levelling control system of aerial platform with locking function according to claim 3, it is characterized in that: between the two braking rod end surface of described wedge and formation open wedge ball is set respectively, the corresponding vertical ball grooves that is provided for holding ball of two braking rod end surface of wedge and formation open wedge with ball.
5. the real-time levelling control system of aerial platform with locking function according to claim 4, it is characterized in that: described hydraulic efficiency pressure system comprises Hydraulic Pump, leveling electromagnetic proportional valve and brake cylinder electromagnetic valve, described Hydraulic Pump liquid outlet is connected in two epitrochoidal chambers of leveling cylinder by the leveling electromagnetic proportional valve, and described Hydraulic Pump liquid outlet is communicated in the hydraulic-driven chamber of brake cylinder by the brake cylinder electromagnetic valve;
The order output terminal of described central process unit connects the control circuit of leveling electromagnetic proportional valve and the control circuit of brake cylinder electromagnetic valve.
6. the real-time levelling control system of aerial platform with locking function according to claim 5, it is characterized in that: on the liquid in-out pipeline of two epitrochoidal chambers of described leveling cylinder balance cock is set respectively, described balance cock comprises by pass valve parallel with one another and feed liquor check valve; , governor valve and backflow check valve in parallel are set on the hydraulic-driven chamber liquid in-out pipeline of brake cylinder.
7. the real-time levelling control system of aerial platform with locking function according to claim 6 is characterized in that: described ball is provided for the maintenance carriage that prevents that it from coming off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206522159U CN201923828U (en) | 2010-12-10 | 2010-12-10 | High-altitude operation truck real-time leveling control system with locking function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206522159U CN201923828U (en) | 2010-12-10 | 2010-12-10 | High-altitude operation truck real-time leveling control system with locking function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201923828U true CN201923828U (en) | 2011-08-10 |
Family
ID=44427692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206522159U Expired - Fee Related CN201923828U (en) | 2010-12-10 | 2010-12-10 | High-altitude operation truck real-time leveling control system with locking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201923828U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701107A (en) * | 2012-06-20 | 2012-10-03 | 吉林省电力有限公司吉林供电公司 | Lifting bracket for installation of disconnecting switch mechanism |
| CN102865855A (en) * | 2012-09-27 | 2013-01-09 | 无锡华科机械设备有限公司 | Intelligent test monitoring console for inclination angle of safety lock locking ropes |
| CN102928129A (en) * | 2012-10-31 | 2013-02-13 | 长沙中联消防机械有限公司 | Load measurement method and assembly of working bucket and overhead working truck |
| CN103787245A (en) * | 2014-01-17 | 2014-05-14 | 宁波大学 | Detection system and detection method for safety lock of hanging basket |
| CN103832949A (en) * | 2012-11-26 | 2014-06-04 | 长沙中联消防机械有限公司 | Working bucket leveling device and overhead working truck |
| CN103922250A (en) * | 2013-01-16 | 2014-07-16 | 徐州徐工随车起重机有限公司 | Work hopper leveling system and folding arm overhead working truck |
| CN111395226A (en) * | 2018-03-01 | 2020-07-10 | 淄博职业学院 | Control method of intelligent balance shockproof automobile entrance guard barrier gate |
| CN111543823A (en) * | 2020-05-12 | 2020-08-18 | 肖来 | Baby walker with speed reduction function |
-
2010
- 2010-12-10 CN CN2010206522159U patent/CN201923828U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701107A (en) * | 2012-06-20 | 2012-10-03 | 吉林省电力有限公司吉林供电公司 | Lifting bracket for installation of disconnecting switch mechanism |
| CN102865855A (en) * | 2012-09-27 | 2013-01-09 | 无锡华科机械设备有限公司 | Intelligent test monitoring console for inclination angle of safety lock locking ropes |
| CN102928129A (en) * | 2012-10-31 | 2013-02-13 | 长沙中联消防机械有限公司 | Load measurement method and assembly of working bucket and overhead working truck |
| CN102928129B (en) * | 2012-10-31 | 2015-09-23 | 长沙中联消防机械有限公司 | Working bucket load measurement method, assembly and high-altitude operation vehicle |
| CN103832949A (en) * | 2012-11-26 | 2014-06-04 | 长沙中联消防机械有限公司 | Working bucket leveling device and overhead working truck |
| CN103922250B (en) * | 2013-01-16 | 2016-09-14 | 徐州徐工随车起重机有限公司 | Working bucket leveling system and folding arm high-altitude operation vehicle |
| CN103922250A (en) * | 2013-01-16 | 2014-07-16 | 徐州徐工随车起重机有限公司 | Work hopper leveling system and folding arm overhead working truck |
| CN103787245A (en) * | 2014-01-17 | 2014-05-14 | 宁波大学 | Detection system and detection method for safety lock of hanging basket |
| CN103787245B (en) * | 2014-01-17 | 2016-01-20 | 宁波大学 | A kind of cradle safety lock checking system and method for inspection |
| CN111395226A (en) * | 2018-03-01 | 2020-07-10 | 淄博职业学院 | Control method of intelligent balance shockproof automobile entrance guard barrier gate |
| CN111395226B (en) * | 2018-03-01 | 2021-12-10 | 林仙丽 | Control method of intelligent balance shockproof automobile entrance guard barrier gate |
| CN111543823A (en) * | 2020-05-12 | 2020-08-18 | 肖来 | Baby walker with speed reduction function |
| CN111543823B (en) * | 2020-05-12 | 2024-05-24 | 重庆锋奥鑫科技有限公司 | Baby walker with deceleration function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201923828U (en) | High-altitude operation truck real-time leveling control system with locking function | |
| US6584769B1 (en) | Mobile working machine | |
| CN102575690B (en) | Hydraulic system for operating machine | |
| CN101709725B (en) | Downhole anti-explosion hoisting machine hydraulic control system adopting multi-pump combination technique | |
| CN102259809A (en) | Control system and control method of forklift door frame | |
| CN110914152A (en) | Method and device for lifting load | |
| KR20130010024A (en) | Traveling hydraulic handling machine of energy-saving type | |
| CN101649849B (en) | Brake circuit of hydraulic motor | |
| CN101700856B (en) | Hydraulic system for automatically controlling mast retraction of crawler crane | |
| CN103732835A (en) | System and method for recovering energy and leveling hydraulic system loads | |
| US20120283919A1 (en) | Electric swing drive control system and method | |
| CN201526546U (en) | Hydraulic control system of underground anti-explosion hoister adopting multi-pump combination technique | |
| CN105604121B (en) | A kind of control loop of engineer operation armament-related work device | |
| KR20020071003A (en) | Mobile handling device | |
| CN201240815Y (en) | Mechanical, electrical and hydraulic automatic leveling apparatus for work platform of lifting vehicle | |
| CN101870270B (en) | Mine self-discharging vehicle carriage floating descending control device | |
| CN102695885A (en) | A method for controlling a hydraulic system of a working machine | |
| CN105366604A (en) | Working bucket leveling mechanism of hydraulic aerial cage | |
| CN106321534A (en) | Heave compensation device of hook block assembly for marine floating drilling | |
| CN100344524C (en) | Control device for hydraulic winch | |
| CN105544631A (en) | Control loop of hydraulic bucket working device | |
| CN204150975U (en) | Secondary motor control wave compensation system | |
| CN103754781A (en) | Hydraulic system and crane | |
| CN102862922B (en) | Crane, and anti-backward-tilting control method and anti-backward-tilting control system thereof | |
| CN101962068A (en) | Hydraulic control system for fin stabilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110810 Termination date: 20111210 |