CN104528541A - Hyperextension preventing device for single-cylinder bolt type crane oil cylinder - Google Patents
Hyperextension preventing device for single-cylinder bolt type crane oil cylinder Download PDFInfo
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- CN104528541A CN104528541A CN201410775919.8A CN201410775919A CN104528541A CN 104528541 A CN104528541 A CN 104528541A CN 201410775919 A CN201410775919 A CN 201410775919A CN 104528541 A CN104528541 A CN 104528541A
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- hyperextension
- arm
- proximity switch
- oil cylinder
- cylinder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention belongs to the field of hyperextension prevention of a crane oil cylinder, and particularly relates to a hyperextension preventing device for the single-cylinder bolt type crane oil cylinder. The hyperextension preventing device comprises a telescopic oil cylinder, and a distal arm of a crane boom. The hyperextension preventing device is characterized by also comprising a detection seat which is positioned at the tail of the distal arm and/or extends out from the distal arm, an arm position detection sliding block fixedly arranged on the telescopic oil cylinder, and a proximity switch, and the detection seat is provided with a hyperextension preventing detection component; when detecting the hyperextension preventing detection component, the proximity switch sends switching value signals to a controller, and the controller makes logical judgment and limits the telescopic cylinder to continue to make forward extension action. The hyperextension preventing device provided by the invention mainly has the following advantages of preventing the dangers caused by manual misoperation, needing no long-term participation of the cylinder to improve the detection accuracy, performing electrical control limiting once before structural limiting, and dually ensuring the telescopic cylinder to prevent hyperextension caused by misoperation and greatly improve the safety of the complete device.
Description
Technical field
The invention belongs to the anti-hyperextension field of hoist cylinder, be specifically related to the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder.
Background technology
Single cylinder bolt-type telescopic system: be that one is built in hoisting crane semi-girder, realized a kind of device of the Telescopic of hoisting crane semi-girder by telescopic oil cylinder.Primarily of semi-girder and telescopic oil cylinder composition, wherein arm pin, cylinder pin, dovetail furrow, detector switch and other auxiliary facilities is that semi-girder realizes flexible main function components, see Fig. 1.
Concrete structure comprises:
Cylinder head body: be positioned on telescopic oil cylinder cylinder barrel or piston rod, realizing between telescopic oil cylinder and semi-girder, between semi-girder and semi-girder connecting and the device be separated for controlling, mainly comprising arm pin actuating device, cylinder pin, driving oil cylinder, position probing block etc.
Cylinder pin: the pin on telescopic oil cylinder, works as oil cylinder and semi-girder being locked together.In existing product, each cylinder head has 2 or 4 cylinder pins usually.
Arm pin: the pin on semi-girder, it act as and is locked together by each joint semi-girder.The each cylinder head of existing product uses 1 or 2 arm pins usually.
Detector switch: unlock and the sensor of locking state for detecting the arm position of each joint arm, cylinder pin and arm pin.
Hoisting crane is when carrying out hoisting arm expansion, first the cylinder pin of telescopic oil cylinder is needed to retract, as shown in Figure 2, now telescopic oil cylinder is in sky cylinder state, namely telescopic oil cylinder can carry out relative motion in semi-girder inside, arm position detector switch according to telescopic oil cylinder afterbody detects slide block in conjunction with the arm position of each joint semi-girder afterbody, can determine the position at current telescopic oil cylinder place.
Fig. 3 be minor details arm and telescoping cylinder detection arm position time schematic diagram, upper as can be seen from figure, detect seat and be fixed on minor details arm, proximity switch is fixed on telescopic oil cylinder, along with the movement of telescopic oil cylinder, proximity switch and detection seat realize relative motion, and then realize the detection of arm position.When proximity switch is in position A, now just in time arm position can be detected, according to the operation of specification, now should release cylinder pin, continue driven forward oil cylinder, when the B of proximity switch in-position, cylinder pin inserts in minor details arm arm tail cylinder key seat automatically, just can realize the flexible of six joint arms.As can be seen from the figure, when proximity switch is between position A and position C, it is bright that lamp is detected in arm position, six joint arm arm tails can be detected, if maloperation appears in operator, when proximity switch being reached position D, now will occur sliding down and the situation of hyperextension, the damage of physical construction can be caused, threaten complete machine safety.
Simultaneously, when the detector switch of telescopic oil cylinder afterbody detects the arm position of minor details arm, the other end of telescopic oil cylinder is positioned at minor details arm head inside, telescopic oil cylinder end and minor details arm arm head foremost distance are less, when misoperation, just can cause telescopic oil cylinder hyperextension, break the jib tip structure of minor details arm, therefore generally consider when rubber tyre gantry crane design to adopt that structure is spacing realizes anti-hyperextension, can also prevent telescoping cylinder from directly disclosing minor details arm arm head simultaneously.
When oil cylinder and postive stop baffle structure are collided, the very large sound can be sent, rock with seasonal complete machine, affect operation comfort and complete machine safety.Therefore consider, how before oil cylinder and postive stop baffle are collided, just to realize the spacing of telescoping cylinder, to reach the object of anti-hyperextension.This patent is on this basis, combination arm tail detecting device, is realized the anti-hyperextension technology of telescoping cylinder by electrical control.
In order to prevent telescopic oil cylinder hyperextension, existing scheme is: when the detector switch of telescopic oil cylinder afterbody detects minor details arm arm position, telescopic oil cylinder continues to protract, pay close attention to arm position detection signal by controller whether to disappear, if detection signal disappears, then continue by controller restriction oil cylinder action of protracting.
There is following shortcoming in existing technology:
1. whether prior art is disappeared by arm position detector switch signal and judges telescopic oil cylinder whether hyperextension, there is failure risk.For part contilever structure, its length detecting seat is greater than the gap of telescopic oil cylinder and minor details arm, when arm position detector switch is not yet completely by detecting seat, now arm position detection signal not yet disappears, and the end of telescopic oil cylinder clashes into the jib tip structure of minor details arm.
2. telescopic oil cylinder moves at the inner slideway along semi-girder tail inner side of semi-girder, and when the arm position detector switch of telescopic oil cylinder afterbody detects seat by minor details arm completely, cylinder head body is about to the slideway departing from semi-girder inside completely.Therefore, there is the risk that telescopic oil cylinder departs from slideway in prior art, namely occurs the phenomenon that slides down often said in field.
Summary of the invention
The object of this invention is to provide the anti-hyperextension device of a kind of single-cylinder plug type telescopic jib crane oil cylinder, avoid telescopic oil cylinder hyperextension to break jib tip structure.
To achieve these goals, the technical solution used in the present invention is: the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder, comprise the minor details arm of telescopic oil cylinder, hoisting crane semi-girder, it is characterized in that, also comprise and be positioned at minor details arm arm tail and/or detect slide block and proximity switch by the outwardly directed detection seat of minor details arm arm tail, the arm position be fixed on telescopic oil cylinder, described detection seat is provided with anti-hyperextension detection means; Described proximity switch and the relative motion of detection seat, when proximity switch detects anti-hyperextension detection means, namely proximity switch detects particular detection signal, and controls telescopic oil cylinder stopping extend action by controller.
Further, described detection seat is positioned at minor details arm arm tail, and detect seat and be provided with the first bent plate cooperatively interacted with proximity switch, described anti-hyperextension detection means is the second bent plate be positioned at below the first bent plate; Second bent plate extends through desired location to time corresponding mutually with proximity switch position.Desired location refers to, position when cylinder pin should insert minor details arm arm tail cylinder key seat automatically residing for telescopic oil cylinder.(as follows)
Also or, described detection seat detects block by be positioned at minor details arm arm tail first and detects block by minor details arm arm tail outwardly directed second and forms, and second detects the length of block is less than the first detection block; Second detection block is anti-hyperextension detection means, and second detects block extends through desired location to time corresponding mutually with proximity switch position.
Also or, described detection seat is positioned at minor details arm arm tail and by protruding one section of minor details arm arm tail, detect seat to comprise the 3rd bent plate and be positioned at the 4th bent plate below the 3rd bent plate, the end of the 3rd bent plate and the 4th bent plate is protruding by minor details arm, outwardly directed bent plate forms anti-hyperextension detection means, and anti-hyperextension detection means extends through desired location to time corresponding mutually with the position of proximity switch.
Further, when proximity switch detects particular detection signal, to controller fire switch amount signal, make Logic judgment by controller and limit telescopic oil cylinder and continue action of protracting.
Described proximity switch is 2, and particular detection signal refers to that upper and lower 2 proximity switches are simultaneously bright.
Described proximity switch is positioned at arm position and detects on slide block, and arm position is detected slide block and moved along close or away from detection seat direction.
The anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder, comprise the minor details arm of telescopic oil cylinder, hoisting crane semi-girder, it is characterized in that, also comprise and be positioned at minor details arm arm tail and/or detect slide block and proximity switch by the outwardly directed detection seat of minor details arm, the arm position be fixed on telescopic oil cylinder, described proximity switch moves along close or away from detection seat direction, when proximity switch detects the signal specific detecting seat, to controller fire switch amount signal, and make Logic judgment by controller and limit telescopic oil cylinder and continue action of protracting.
The anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder, comprise the minor details arm of telescopic oil cylinder, hoisting crane semi-girder, it is characterized in that, also comprise and be positioned at minor details arm arm tail and/or detect slide block and proximity switch by the outwardly directed detection seat of minor details arm, the arm position be fixed on telescopic oil cylinder, described proximity switch moves along close or away from detection seat direction, described detection seat is provided with anti-hyperextension detection means, when described proximity switch moves to anti-hyperextension detection means, telescopic oil cylinder extends through desired location, controls telescopic oil cylinder stop extend action by controller.
Key problem in technology point of the present invention is:
1) anti-hyperextension is realized by electrical control and structure optimization.
2) give particular detection signal, realized the spacing control of hydraulic efficiency pressure system by director demon.
The present invention mainly contains following advantage:
1) realize anti-hyperextension by electrical control and structure optimization, prevent people from being the danger that maloperation causes, such as slide down, structure spacing cause rock.
2) structure optimization variation is less, and only increase one piece of bent plate and just can realize letting slip the object of stretching, therefore the present invention increases cost hardly, is easy to realize simultaneously.
3) the anti-hyperextension technology mentioned of the present invention, just can realize before structure is spacing, structure is spacing often brings huge vibration, if structure is spacing not firm simultaneously, easily directly destruction structure inhibiting device or telescoping cylinder, causes danger.This technology just realizing anti-hyperextension before structure is spacing, not only protects structure inhibiting device and telescoping cylinder, reduces the spacing danger brought of structure simultaneously.
4) the anti-hyperextension technology mentioned of the present invention is by giving specific detection signal to realize, and in the process, does not need the long line of cylinder to participate in, improves accuracy of detection.
5) before structure is spacing, carry out an electrical control spacing, double shield telescoping cylinder, prevents the hyperextension that maloperation causes, and substantially increases the safety of complete machine.
Accompanying drawing explanation
Fig. 1 single cylinder bolt-type telescopic system schematic diagram;
Fig. 2 cylinder pin is retracted and is found arm position schematic diagram;
Fig. 3 be minor details arm and telescoping cylinder detection arm position time schematic diagram;
The constructional drawing of the existing anti-hyperextension device of Fig. 4;
Fig. 5 is the constructional drawing of existing arm level detecting apparatus;
Fig. 6 is arm level detecting apparatus detailed schematic;
Fig. 7 is the detection holder structure figure of first embodiment improved;
Fig. 8 is the detection logical schematic of first embodiment improved;
Fig. 9 is the constructional drawing of second embodiment improved;
Figure 10 is the constructional drawing of the 3rd embodiment improved;
Wherein, 1. the first bent plate 2. detects seat 3. arm position and detects slide block 4. proximity switch 5. minor details arm 6. telescopic oil cylinder 7. second bent plate 8. second detection block 9. the 3rd bent plate 10. the 4th bent plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
In prior art, Fig. 3 be minor details arm (actual for minor details arm arm tail) and telescoping cylinder detection arm position time schematic diagram, upper as can be seen from figure, detecting seat 2 is fixed on minor details arm 5, proximity switch 4(is detecting sensor, or becomes detector switch) be fixed on telescopic oil cylinder 6, along with the movement of telescopic oil cylinder 6, proximity switch 4 and detection seat 2 realize relative motion, and then realize the detection of arm position.When proximity switch 4 is in position A, now just in time arm position can be detected, according to the operation of specification, now should release cylinder pin, continue driven forward oil cylinder, when proximity switch 4 in-position B, cylinder pin inserts in minor details arm arm tail cylinder key seat automatically, just can realize the flexible of six joint arms.As can be seen from the figure, when proximity switch 4 is between position A and position C, it is bright that lamp is detected in arm position, six joint arm arm positions can be detected, if maloperation appears in operator, when proximity switch being reached position D, now will occur sliding down and the situation of hyperextension, the damage of physical construction can be caused, threaten complete machine safety.
Simultaneously, when the proximity switch of telescopic oil cylinder afterbody detects the arm position of minor details arm, the other end of telescopic oil cylinder is positioned at minor details arm head inside, telescopic oil cylinder end and minor details arm arm head foremost distance are less, when misoperation, just can cause telescopic oil cylinder hyperextension, break the jib tip structure of minor details arm, therefore generally consider when rubber tyre gantry crane design to adopt that structure is spacing realizes anti-hyperextension, can also prevent telescoping cylinder from directly disclosing minor details arm arm head simultaneously.
When oil cylinder and postive stop baffle structure are collided, the very large sound can be sent, rock with seasonal complete machine, affect operation comfort and complete machine safety.Therefore consider, how before oil cylinder and postive stop baffle are collided, just to realize the spacing of telescoping cylinder, to reach the object of anti-hyperextension.This patent is on this basis, combination arm tail detecting device, is realized the anti-hyperextension technology of telescoping cylinder by electrical control.
In order to prevent telescopic oil cylinder hyperextension, existing scheme is: when the detector switch (i.e. proximity switch) of telescopic oil cylinder afterbody detects minor details arm arm position, telescopic oil cylinder continues to protract, pay close attention to arm position detection signal by controller whether to disappear, if detection signal disappears, then continue by controller restriction oil cylinder action of protracting.
There is following shortcoming in existing technology:
1. whether prior art is disappeared by arm position detector switch signal and judges telescopic oil cylinder whether hyperextension, there is failure risk.For part contilever structure, its length detecting seat is greater than the gap of telescopic oil cylinder and minor details arm, when arm position detector switch is not yet completely by detecting seat, now arm position detection signal not yet disappears, and the end of telescopic oil cylinder clashes into the jib tip structure of minor details arm.
2. telescopic oil cylinder moves at the inner slideway along semi-girder tail inner side of semi-girder, and when the arm position detector switch of telescopic oil cylinder afterbody detects seat by minor details arm completely, cylinder head body is about to the slideway departing from semi-girder inside completely.Therefore, there is the risk that telescopic oil cylinder departs from slideway in prior art, namely occurs the phenomenon that slides down often said in field.
Basic thought of the present invention is the mode adopting electrical control and the anti-hyperextension detecting device that is positioned at arm tail to combine, detect seat to minor details arm arm tail to process, specific proximity switch detection signal is set, slide down and structure spacing before, the anti-hyperextension realizing telescoping cylinder is spacing.
Fig. 5 is common arm level detecting apparatus detail view, and its major part is: be fixed on the detection seat 2 at semi-girder arm tail place and the first bent plate 1 for detection arm position, and slide block 3 and proximity switch 4 are detected in the arm position be fixed on telescopic oil cylinder.Its movement mechanism is that proximity switch 4 and arm position are detected slide block 3 along with the motion of telescopic oil cylinder and progressively pressed close to detect seat 2, and when the first bent plate 1 covers the detection range of proximity switch 4 completely, arm position detection lamp is bright.Composition graphs 6, when proximity switch 4 is in position B, cylinder pin is plugged automatically, and can realize semi-girder and stretch, now proximity switch is just in time in the centre of bent plate.In general design, the length of the first bent plate 1 is generally 200 ~ 300mm, and the maximum clearance of cylinder pin and cylinder key seat is generally about 20mm, then, after cylinder is sold out and entirely plugged, the distance that the first bent plate 1 remains about 80 ~ 130mm does not use.And this patent improves for the bent plate of this 80 ~ 130mm, by arranging specific proximity switch detection signal, reaches the object of anti-hyperextension.
Fig. 7 is the detection holder structure form of first embodiment after improvement, and it is mainly transformed for untapped part on the first bent plate 1, and increasing by one piece in bottom for the second bent plate 7(detected is anti-hyperextension detection means).Composition graphs 8, its principle of work is: proximity switch 4 along with oil cylinder detection seat 2 slide, when it is in A ~ B position, cylinder pin can be inserted in cylinder key seat completely.If now there is maloperation, it is bright that operator does not notice that lamp is detected in arm position in time, do not shift to an earlier date release cylinder pin, cause proximity switch 4 move to B after position time, even if release cylinder pin, also cannot be inserted in cylinder key seat, if operator still continues telescoping cylinder to stretch out, proximity switch 4 continues to move ahead, when moving to C position, proximity switch 4 detects signal specific, illustrate that now telescopic oil cylinder extends through desired location, after controller detects this signal specific, by corresponding control program, restriction telescopic oil cylinder continues to protract, thus reach the object preventing telescopic oil cylinder hyperextension.Which is detecting the change that seat 2 carries out, and when hyperextension being detected, telescoping cylinder does not also depart from minor details arm slideway completely, not only there will not be the phenomenon slided down, also can realize anti-hyperextension before structure is spacing.
Note: particular detection signal selected in this example is that upper and lower proximity switch is simultaneously bright.In addition, when adopting two proximity switches, its detectable signal has 16 kinds, only needs the detection signal selecting other joint arms a kind of not use wherein as particular detection signal, just can realize the object desired by the present invention.
For technical scheme of the present invention, mainly containing following scheme can replace:
As shown in Figure 9, after minor details arm, (it is anti-hyperextension detection means for an increase short slide block or steel plate, also be the second detection block 8), minor details arm tail end is that the first detection block (is namely equivalent to detection seat of the prior art, identical with the detection seat of Fig. 5) its principle of work is: when operator's maloperation, proximity switch 4 on telescopic oil cylinder slips over detect i.e. the first detection block of seat 2(completely), and continue to move ahead, when the slide block that proximity switch starts to detect that rear tail increases or steel plate, now receive specific detection signal (being the complete bright signal of proximity switch), just oil cylinder extend action is stopped by controller when this signal being detected.
As shown in Figure 10, its principle of work is: lengthened by the detection seat 2 of minor details arm arm tail, increase the detection length of anti-hyperextension particular detection signal simultaneously, when the proximity switch on telescopic oil cylinder detects signal specific, just stop oil cylinder extend action by controller.Described detection seat 2 is positioned at minor details arm arm tail and by minor details arm 5 protruding one section, detect the 4th bent plate 10 that seat comprises the 3rd bent plate 9 and is positioned at below the 3rd bent plate, the end of the 3rd bent plate and the 4th bent plate is protruding by minor details arm, outwardly directed bent plate forms anti-hyperextension detection means, and anti-hyperextension detection means extends through desired location to time corresponding mutually with proximity switch.
Other are by giving particular detection signal, and the method realizing the anti-hyperextension of telescoping cylinder all belongs to the protection category of this patent.
More than show and describe groundwork of the present invention, principal character and advantage.The technical personnel of the industry should be understood; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. the anti-hyperextension device of single cylinder bolt-type hoist cylinder, comprise the minor details arm of telescopic oil cylinder, hoisting crane semi-girder, it is characterized in that, also comprise and be positioned at minor details arm arm tail and/or detect slide block and proximity switch by the outwardly directed detection seat of minor details arm arm tail, the arm position be fixed on telescopic oil cylinder, described detection seat is provided with anti-hyperextension detection means; Described proximity switch and the relative motion of detection seat, when proximity switch detects anti-hyperextension detection means, namely proximity switch detects particular detection signal, and controls telescopic oil cylinder stopping extend action by controller.
2. the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder according to claim 1, it is characterized in that, described detection seat is positioned at minor details arm arm tail, detect seat and be provided with the first bent plate cooperatively interacted with proximity switch, described anti-hyperextension detection means is the second bent plate be positioned at below the first bent plate; Second bent plate extends through desired location to time corresponding mutually with proximity switch position.
3. the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder according to claim 1, it is characterized in that, described detection seat detects block by be positioned at minor details arm arm tail first and detects block by minor details arm arm tail outwardly directed second and forms, and the second length detecting block is less than the first detection block; Second detection block is anti-hyperextension detection means, and second detects block extends through desired location to time corresponding mutually with proximity switch position.
4. the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder according to claim 1, it is characterized in that, described detection seat is positioned at minor details arm arm tail and by protruding one section of minor details arm arm tail, detect seat to comprise the 3rd bent plate and be positioned at the 4th bent plate below the 3rd bent plate, the end of the 3rd bent plate and the 4th bent plate is protruding by minor details arm, outwardly directed bent plate forms anti-hyperextension detection means, and anti-hyperextension detection means extends through desired location to time corresponding mutually with the position of proximity switch.
5. the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder according to claim 1-4 any one, it is characterized in that, when proximity switch detects particular detection signal, to controller fire switch amount signal, make Logic judgment by controller and limit telescopic oil cylinder and continue action of protracting.
6. the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder according to claim 5, it is characterized in that, described proximity switch is 2, and particular detection signal refers to that upper and lower 2 proximity switches are simultaneously bright.
7. the anti-hyperextension device of a kind of single cylinder bolt-type hoist cylinder according to claim 1-4, is characterized in that, described proximity switch is positioned at arm position and detects on slide block, and arm position is detected slide block and moved along close or away from detection seat direction.
8. the anti-hyperextension device of single cylinder bolt-type hoist cylinder, comprise the minor details arm of telescopic oil cylinder, hoisting crane semi-girder, it is characterized in that, also comprise and be positioned at minor details arm arm tail and/or detect slide block and proximity switch by the outwardly directed detection seat of minor details arm, the arm position be fixed on telescopic oil cylinder, described proximity switch moves along close or away from detection seat direction, when proximity switch detects the signal specific detecting seat, to controller fire switch amount signal, and make Logic judgment by controller and limit telescopic oil cylinder and continue action of protracting.
9. the anti-hyperextension device of single cylinder bolt-type hoist cylinder, comprise the minor details arm of telescopic oil cylinder, hoisting crane semi-girder, it is characterized in that, also comprise and be positioned at minor details arm arm tail and/or detect slide block and proximity switch by the outwardly directed detection seat of minor details arm, the arm position be fixed on telescopic oil cylinder, described proximity switch moves along close or away from detection seat direction, described detection seat is provided with anti-hyperextension detection means, when described proximity switch moves to anti-hyperextension detection means, telescopic oil cylinder extends through desired location, controls telescopic oil cylinder stop extend action by controller.
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| CN201410775919.8A CN104528541B (en) | 2014-12-15 | 2014-12-15 | A kind of anti-hyperextension device of single cylinder bolt-type hoist cylinder |
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| CN201410775919.8A CN104528541B (en) | 2014-12-15 | 2014-12-15 | A kind of anti-hyperextension device of single cylinder bolt-type hoist cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105565188A (en) * | 2015-12-29 | 2016-05-11 | 中联重科股份有限公司 | Structure and method for preventing oil cylinder from rushing out of knuckle arm and suspension arm |
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| CN101804945A (en) * | 2010-05-07 | 2010-08-18 | 三一汽车起重机械有限公司 | Single cylinder bolt-type telescopic arm device and arm section position detection system thereof |
| CN102180416A (en) * | 2011-01-26 | 2011-09-14 | 徐州赫思曼电子有限公司 | Electronic hyperextension-proof device of single cylinder bolt type telescopic boom crane oil cylinder |
| CN203128076U (en) * | 2013-03-19 | 2013-08-14 | 北京京城重工机械有限责任公司 | Arm position detecting device of single-cylinder plug-pin-type telescopic arm |
| CN203486801U (en) * | 2013-09-04 | 2014-03-19 | 徐州重型机械有限公司 | Crane as well as single-cylinder plug type retractable boom and boom position detection device thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105565188A (en) * | 2015-12-29 | 2016-05-11 | 中联重科股份有限公司 | Structure and method for preventing oil cylinder from rushing out of knuckle arm and suspension arm |
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