CN204224144U - A kind of arm level detecting apparatus and hoisting crane - Google Patents
A kind of arm level detecting apparatus and hoisting crane Download PDFInfo
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- CN204224144U CN204224144U CN201420600803.6U CN201420600803U CN204224144U CN 204224144 U CN204224144 U CN 204224144U CN 201420600803 U CN201420600803 U CN 201420600803U CN 204224144 U CN204224144 U CN 204224144U
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Abstract
The utility model relates to a kind of arm level detecting apparatus and hoisting crane, wherein, arm level detecting apparatus, comprise a joint basic arm, several sections of telescopic boom and oil cylinder, also comprise length measurement sensor and arm bit check mechanism, described length measurement sensor is arranged on described basic arm, for detecting the stroke of described oil cylinder, determine arm position, described arm bit check mechanism comprises several verification proximity switch and several verification check-out console, each described verification proximity switch is all arranged on described oil cylinder, verifying check-out console correspondence described in each is arranged on the described telescopic boom of a joint, the perforate that each described verification check-out console is arranged is all different, for ensureing that each described verification proximity switch detects different signals in dissimilar arm position, in testing process, first by described length measurement sensor determination arm position, the rear correctness by described arm bit check mechanism verification arm position.The utility model can improve accuracy and the reliability of telescopic boom sequential telescopic.
Description
Technical field
The utility model relates to engineering machinery field, particularly relates to a kind of arm level detecting apparatus and hoisting crane.
Background technology
At present, boom telescoping device hoisting crane used mainly comprises single cylinder bolt-type mechanism and two kinds, oil cylinder Jia Shengpai formula mechanism.For the crane products with six joints and the above crane arm of six joints, single-cylinder bolt telescoping mechanism is a kind of mechanism form generally adopted.Its principal feature adopts single oil cylinder to promote the flexible of each joint arm, often save arm and four arm pin-and-holes are generally set between the length of 0% ~ 100%, two sides of tail then respectively has a cylinder pin-and-hole, arm pin is positioned at the afterbody often saving arm, for the locking between arm and arm, cylinder pin is positioned at the cylinder cap position of cylinder tube, often saves the flexible of arm for promoting.According to vertical order when crane arm is stretched, control according to order from back to front during contracting.
Current hoisting crane adopts proximity switch to coordinate the mode detection arm position of check-out console, in the left or right side of each joint telescopic boom rear end, proximity switch check-out console is all installed, the floating nylon block of oil cylinder head both sides fixedly mounts several proximity switches, the check-out console often saving Telescopic boom tail position can be detected respectively.The Comprehensive Control Technology that combines of mechanical electronic hydraulic is adopted automatically to carry out more piece crane arm to stretch the control of target to realize single oil cylinder, cylinder pin, arm pin can accept control according to the logical order of setting, carry out locking or unlocking, and after each locking or unlocking motion complete instruction, carry out detecting and feed back settling signal to controller, controller can carry out next step motor performance.After operator carries out the setting of crane arm collapsing length according to operating mode, control system is passed through the detection of position of the arm pin on oil cylinder afterbody cylinder pin and each joint arm and the measurement to oil cylinder collapsing length, send the switching value of detection and analog signals to controller, controller is according to the signal of feedback, according to flexible target and the control logic of setting, automatically carry out the extension and contraction control of crane arm.
Owing to only adopting one group of proximity switch detection arm position, without other checking aparatuss, when certain proximity switch breaks down, the situation that arm position is confused may be there is, now feed back to the information errors of controller, controller can not be correct according to the information of mistake control crane arm flexible, reliability is not high.
Utility model content
The purpose of this utility model proposes a kind of arm level detecting apparatus and hoisting crane, and it can improve accuracy and the reliability of telescopic boom sequential telescopic.
For achieving the above object, the utility model provides a kind of arm level detecting apparatus, it comprises a joint basic arm, several sections of telescopic boom and oil cylinder, also comprise length measurement sensor and arm bit check mechanism, described length measurement sensor is arranged on described basic arm, for detecting the stroke of described oil cylinder, determine arm position, described arm bit check mechanism comprises several verification proximity switch and several verification check-out console, each described verification proximity switch is all arranged on described oil cylinder, verifying check-out console correspondence described in each is arranged on the described telescopic boom of a joint, the perforate that each described verification check-out console is arranged is all different, for ensureing that each described verification proximity switch detects different signals in dissimilar arm position, in testing process, first by described length measurement sensor determination arm position, the rear correctness by described arm bit check mechanism verification arm position.
One preferably or in embodiment, also comprise speed reduction gearing, described speed reduction gearing comprises several deceleration proximity switch and several deceleration check-out console, and each described deceleration proximity switch is all arranged on described oil cylinder, and check-out console correspondence of slowing down described in each is arranged on the described telescopic boom of a joint; Described oil cylinder is flexible in the described telescopic boom of a certain joint to be determined in the process of arm position, each described deceleration proximity switch detects the described deceleration check-out console on the described telescopic boom of this joint successively, when the proximity switch that slows down described in each detects described deceleration check-out console, described oil cylinder slows down once.
One preferably or in embodiment, several described verification proximity switch is arranged on the left of the cylinder head of described oil cylinder as one group; Several described deceleration proximity switch is arranged on the right side of the cylinder head of described oil cylinder as another group; Corresponding, each left side saving described telescopic boom arranges verification check-out console, and each right side saving described telescopic boom arranges described deceleration inspection panel.
One preferably or in embodiment, described deceleration proximity switch comprises stretches deceleration proximity switch and the fast proximity switch of reduction, stretching deceleration proximity switch described in several is arranged near anterior position on the right side of described cylinder head, and the fast proximity switch of several described reductions is arranged on the position near rear portion on the right side of described cylinder head.
One preferably or in embodiment, described stretch deceleration proximity switch and described reduction speed proximity switch divide two rows arrange, stretching deceleration proximity switch described in each is arranged on same row along described oil cylinder movement direction, and the fast proximity switch of each described reduction is arranged on same row along described oil cylinder movement direction.
One preferably or in embodiment, described verification proximity switch is four, described in stretch deceleration proximity switch be two, the fast proximity switch of described reduction is two.
One preferably or in embodiment, on the floating nylon block on the left of the cylinder head that several described verification proximity switch is arranged on described oil cylinder; On floating nylon block on the right side of the cylinder head that several described deceleration proximity switch is arranged on described oil cylinder.
One preferably or in embodiment, also comprise controller, described controller is electrically connected described length measurement sensor, verification proximity switch and deceleration proximity switch.
For achieving the above object, the utility model additionally provides a kind of hoisting crane, and it comprises the arm level detecting apparatus in above-mentioned any embodiment.
Based on technique scheme, the utility model at least has following beneficial effect:
The utility model finds arm position by length measurement sensor, by the verification of one group of verification proximity switch look for the correctness of arm position, the mating reaction of Liang Zu mechanism, improves the accuracy rate of telescopic boom sequential telescopic.
One preferably or in embodiment, by arranging one group for the deceleration proximity switch detected that slows down, can pre-decelerating oil cylinder, release cylinder pin, ensure cylinder pin can accurately and effectively by oil cylinder and telescopic boom locked.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
The structural representation of the arm level detecting apparatus that Fig. 1 provides for the utility model;
The layout schematic diagram for the proximity switch detected that slows down that Fig. 2 provides for the utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in embodiment is clearly and completely described.Obviously, described embodiment is only a part of embodiment of the present utility model, instead of whole embodiments.Based on embodiment of the present utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore the restriction to the utility model protection domain can not be interpreted as.
First the technical term related in the utility model is made an explanation.
Arm pin mechanism: the effect of arm pin realizes the locking and unlocking between arm joint, arm pin initial position can move in the arm pin-and-hole of another joint arm under spring force, make the object can not mutually moving to reach rigid locking between arm and arm, when arm pin is subject to the arm pin cylinder effect on oil cylinder, arm pin can move round about and retract from the arm pin of another joint arm, be in released state between arm and arm just can move each other, reach the object of unblock.
Cylinder pin mechanism: cylinder pin motion effect is the locking and unlocking realized between oil cylinder and arm.Cylinder pin initial position can move under spring force in the lateral direction, and can put in the cylinder pin-and-hole of both sides, arm rear end and reach the object with arm rigid locking, at this moment oil cylinder and arm are locked into and are integrated, when cylinder pin is under the effect of cylinder pin oil cylinder, bounce back out cylinder pin-and-hole time, arm and oil cylinder just become the chorista that can mutually move, and reach the object of unblock.
Length measurement sensor: device or the device that can detect length are called length measurement sensor, it refers to can experience (or response) specified measuring range and the device or the device that convert available signal output according to certain rule to.
As shown in Figure 1, for the illustrative examples of the arm level detecting apparatus that the utility model provides, in this illustrative examples, arm level detecting apparatus can comprise a joint basic arm, several sections of telescopic boom (at least one joint telescopic boom) and oil cylinder 1, wherein, basic arm maintains static, first segment telescopic boom is set in basic arm, second section telescopic boom is set in first segment telescopic boom, the like, one end of oil cylinder 1 is fixedly connected with basic arm, the other end can pass through cylinder pin mechanism and arbitrary joint telescopic boom the locking and unlocking, the locking and unlocking can be carried out by arm pin mechanism between each joint telescopic boom.
Arm level detecting apparatus can also comprise length measurement sensor 2 and arm bit check mechanism, length measurement sensor 2 is arranged in basic arm, for detecting the stroke of oil cylinder 1, determine arm position, arm bit check mechanism comprises several verification proximity switch 3 and several verification check-out console, each verification proximity switch 3 is all arranged on oil cylinder 1, each verification check-out console correspondence is arranged on a joint telescopic boom, each verification check-out console all can be provided with perforate, with the position of perforate on check-out console relative to verification proximity switch 3 can not send signal, the position of opening that each verification inspection panel is arranged and/or the number of openings all can be different, therefore, it is also different that each verification proximity switch 3 detects the signal sent on different check inspection panel, and then can ensure that the signal that each verification proximity switch 3 detects in dissimilar arm position is different.In testing process, first determine arm position by length measurement sensor 2, then by the correctness of arm bit check mechanism verification arm position.
The method of being carried out the detection of arm position by the arm level detecting apparatus provided in above-mentioned illustrative examples is comprised the following steps:
Determine arm position: first, the selected telescopic boom needing to stretch, oil cylinder 1 carries out expanding-contracting action, is detected the collapsing length of oil cylinder 1 by length measurement sensor 2 in real time, and after reaching selected telescopic boom, release cylinder pin, is locked oil cylinder 1 and selected telescopic boom by cylinder pin;
Verification arm position: then, by arm bit check, mechanism carries out arm bit check, due to position of opening and/or the number of openings difference of the verification check-out console on each joint telescopic boom, therefore, after verification check-out console corresponding to several verification proximity switch 3 detects in dissimilar arm position, the checking signal sent is different, transmission capable of being combined meets the checking signal of different telescopic boom joint number, if the checking signal sent is consistent with selected arm position, then carry out next step motor performance, if the checking signal sent is inconsistent with selected arm position, then carry out trouble diagnosing.
The arm level detecting apparatus that the utility model provides, by the cooperation of length measurement sensor 2 and arm bit check mechanism, finds arm position and adopts different institutions with verification arm position, can effectively judge when whether forearm position is with to set arm position consistent.
In the illustrative examples of the arm level detecting apparatus provided at the utility model, arm level detecting apparatus can also comprise speed reduction gearing, speed reduction gearing can comprise several deceleration proximity switch 4 and several deceleration check-out console, each deceleration proximity switch 4 is all arranged on oil cylinder 1, and each deceleration check-out console correspondence is arranged on a joint telescopic boom; Oil cylinder 1 is flexible in a certain joint telescopic boom to be determined in the process of arm position, and each deceleration proximity switch 4 detects the deceleration check-out console on this joint telescopic boom successively, and when each deceleration proximity switch 4 detects deceleration check-out console, oil cylinder 1 slows down once.
In above-mentioned illustrative examples, in the process determining arm position, when length measurement sensor 2 detects that the collapsing length of oil cylinder 1 reaches a predetermined value, start to process the signal that deceleration proximity switch 4 sends, each deceleration proximity switch 4 detects deceleration check-out console, reduces the running velocity of an oil cylinder 1, when last deceleration proximity switch 4 detects deceleration check-out console, the running velocity of last reduction oil cylinder 1, and release cylinder pin, locked oil cylinder 1 and selected telescopic boom by cylinder pin.
In above-mentioned illustrative examples, by arranging one group for the deceleration proximity switch 4 detected that slows down, can pre-decelerating oil cylinder 1, release cylinder pin, guarantee by cylinder pin can accurately and effectively by oil cylinder 1 and telescopic boom locked.
In the illustrative examples of the arm level detecting apparatus provided at the utility model, on the floating nylon block 5 on the left of the cylinder head that several verification proximity switch 3 can be arranged on oil cylinder 1 as a group; On floating nylon block 6 on the right side of the cylinder head that several deceleration proximity switch 4 can be arranged on oil cylinder 1 as another group; Corresponding, the left side of each joint telescopic boom can arrange verification check-out console, and the right side of each joint telescopic boom can arrange deceleration inspection panel.
As shown in Figure 2, deceleration proximity switch 4 can comprise stretches deceleration proximity switch 41 and the fast proximity switch 42 of reduction, several deceleration proximity switch 41 of stretching is arranged near anterior position on the right side of cylinder head, and in the process to the oil cylinder 1 that protracts, stretching deceleration proximity switch 41 first can detect check-out console; The fast proximity switch 42 of several reduction is arranged on the position near rear portion on the right side of cylinder head, and in the process of receding oil cylinder 1, reducing fast proximity switch 42 first can detect check-out console.Further, stretch deceleration proximity switch 41 and reduce fast proximity switch 42 and two rows can be divided to arrange, respectively stretch deceleration proximity switch 41 and be arranged on same row along oil cylinder 1 moving direction, the fast proximity switch 42 of each reduction is arranged on same row along oil cylinder 1 moving direction.In the process of stretching oil cylinder 1, only the signal that deceleration proximity switch 41 sends is stretched in process, and in the process of contracting oil cylinder 1, only process reduces the signal that fast proximity switch 42 sends.
In the illustrative examples of the arm level detecting apparatus provided at the utility model, arm level detecting apparatus can also comprise controller, controller electrical connection length measurement sensor 2, verification proximity switch 3 and deceleration proximity switch 4, the signal that length measurement sensor 2, verification proximity switch 3 and deceleration proximity switch 4 send sends controller to, judged by controller, and send the instruction controlling oil cylinder 1 action.
Enumerate a specific embodiment of the arm level detecting apparatus that the utility model provides below, in this specific embodiment, length measurement sensor 2 can arrange one, verification proximity switch 3 can arrange four, stretch deceleration proximity switch 41 and can arrange two, reduce fast proximity switch 42 and also can arrange two, controller can arrange one.
Be specially: four verification proximity switches 3 are as on the floating nylon block 5 on the left of one group of cylinder head being installed on oil cylinder 1, and proper alignment, for verifying arm position.Two stretch deceleration proximity switch 41 and two reduction fast proximity switches 42 detect for oil cylinder 1 pre-decelerating as another group; Stretch on the floating nylon block 6 on the right side of cylinder head that deceleration proximity switch 41 and two fast proximity switches 42 of reduction be installed on oil cylinder 1 for two, staggered, two, the left side is stretched deceleration proximity switch 41 and is stretched out deceleration for oil cylinder 1, and two, the right fast proximity switch 42 of reduction is retracted for oil cylinder 1 and slowed down.Corresponding, the verification check-out console for verifying arm position is installed on the left side of each joint telescopic boom rear end; The deceleration check-out console detected for oil cylinder 1 pre-decelerating is installed on the right side that each saves telescopic boom rear end.
The working process of the arm level detecting apparatus in above-mentioned specific embodiment is: measure oil cylinder 1 stroke to find the arm position of setting with length measurement sensor 2, when one group of deceleration proximity switch 4 detected for slowing down detects deceleration check-out console, signal is sent to controller, oil cylinder 1 reduces speed now, release cylinder pin after twice deceleration, after oil cylinder 1 is locked by cylinder pin and telescopic boom, carry out arm bit check, one group is used for the verification proximity switch 3 of arm bit check and the signal detected is sent to controller, and controller can carry out next step motor performance.
Action due to oil cylinder 1 comprises extend action and retract action, and therefore, the working process of arm level detecting apparatus in oil cylinder 1 extend action and retract action in above-mentioned specific embodiment is as follows:
When carrying out extend action: operator selectes the extension elongation of crane arm according to operating mode, length measurement sensor 2 detects the extension elongation of oil cylinder 1 in real time and signal is sent to controller, the extension elongation detected when length measurement sensor 2 reaches in controller computing value certain limit, and controller starts to process the signal stretched deceleration proximity switch 41 and send.Stretch deceleration proximity switch 41 for first and check-out console detected, signal is sent to controller, the running velocity of controller first time reduction oil cylinder 1, oil cylinder 1 low speed runs forward, stretches deceleration proximity switch 41 for second and check-out console detected, sends signal to controller, controller second time reduces the running velocity of oil cylinder 1, and release cylinder pin, cylinder pin slowly slides into cylinder pin-and-hole, by oil cylinder 1 and telescopic boom locking.Send signal to controller after cylinder lock is fixed, then carry out arm bit check.Because the perforate often saving the verification check-out console of the afterbody of telescopic boom is different, therefore, it is possible to ensure the signal that dissimilar arm position is corresponding different, four verification proximity switches 3 detect, and transmission capable of being combined meets the signal of the different telescopic boom joint number of existing hoisting crane.The signal that controller process verification proximity switch 3 sends, if the signal received is consistent with the arm position of setting, controller carries out next step motor performance.If the signal received and the arm position of setting inconsistent, carry out trouble diagnosing.
When carrying out retract action: operator selectes the retraction length of crane arm according to operating mode, length measurement sensor 2 detects the retraction length of oil cylinder 1 in real time and signal is sent to controller, the retraction length detected when length measurement sensor 2 reaches in controller computing value certain limit, controller starts to process the signal reducing fast proximity switch 42 and send, first fast proximity switch 42 of reduction detects check-out console, signal is sent to controller, the running velocity of controller first time reduction oil cylinder 1, oil cylinder 1 low speed runs backward, second fast proximity switch 42 of reduction detects check-out console, signal is sent to controller, controller second time reduces the running velocity of oil cylinder 1, and release cylinder pin, cylinder pin slowly slides into cylinder pin-and-hole, by oil cylinder 1 and telescopic boom locking.Send signal to controller after cylinder lock is fixed, then carry out arm bit check.Because the perforate often saving the verification check-out console of the afterbody of telescopic boom is different, therefore, it is possible to ensure the signal that dissimilar arm position is corresponding different, four verification proximity switches 3 detect, and transmission capable of being combined meets the signal of the different telescopic boom joint number of existing hoisting crane.The signal that controller process verification proximity switch 3 sends, if the signal received is consistent with the arm position of setting, controller carries out next step motor performance.If the signal received and the arm position of setting inconsistent, carry out trouble diagnosing.
The semi-girder flow process of the arm level detecting apparatus in above-mentioned specific embodiment can be reduced to:
When looking for forward arm position: pull out cylinder pin → look for arm position → twice deceleration → insert cylinder pin → inspection arm position → pull out arm pin → semi-girder → arms pin.
When looking for arm position backward: pull out cylinder pin → look for arm position → twice deceleration → insert cylinder pin → inspection arm position → pull out arm pin → semi-girder → arms pin.
The contracting arm flow process of the arm level detecting apparatus in above-mentioned specific embodiment can be reduced to:
When contracting non-present arm: pull out cylinder pin → look for arm position → twice deceleration → insert cylinder pin → inspection arm position → pull out arm pin → contracting arm → arms pin.
The arm level detecting apparatus that the utility model provides can be applied on single cylinder bolt-type hoisting crane.
In the hoisting crane illustrative examples that the utility model provides, hoisting crane comprises basic arm, several sections of telescopic boom, oil cylinder, arm pin mechanism and cylinder pin mechanism, also comprises the arm level detecting apparatus in above-mentioned any embodiment.
The arm level detecting apparatus provided by the utility model, can be ensured that each cylinder pin and arm pin can accept control according to the logical order set, carry out accurately locking or unlocking.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to detailed description of the invention of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technical scheme scope of the utility model request protection.
Claims (9)
1. an arm level detecting apparatus, comprise a joint basic arm, several sections of telescopic boom and oil cylinder, it is characterized in that: also comprise length measurement sensor and arm bit check mechanism, described length measurement sensor is arranged on described basic arm, for detecting the stroke of described oil cylinder, determine arm position, described arm bit check mechanism comprises several verification proximity switch and several verification check-out console, each described verification proximity switch is all arranged on described oil cylinder, verifying check-out console correspondence described in each is arranged on the described telescopic boom of a joint, the perforate that each described verification check-out console is arranged is all different, for ensureing that each described verification proximity switch detects different signals in dissimilar arm position, in testing process, first by described length measurement sensor determination arm position, the rear correctness by described arm bit check mechanism verification arm position.
2. arm level detecting apparatus as claimed in claim 1, it is characterized in that: also comprise speed reduction gearing, described speed reduction gearing comprises several deceleration proximity switch and several deceleration check-out console, each described deceleration proximity switch is all arranged on described oil cylinder, and check-out console correspondence of slowing down described in each is arranged on the described telescopic boom of a joint; Described oil cylinder is flexible in the described telescopic boom of a certain joint to be determined in the process of arm position, each described deceleration proximity switch detects the described deceleration check-out console on the described telescopic boom of this joint successively, when the proximity switch that slows down described in each detects described deceleration check-out console, described oil cylinder slows down once.
3. arm level detecting apparatus as claimed in claim 2, is characterized in that: several described verification proximity switch is arranged on the left of the cylinder head of described oil cylinder as one group; Several described deceleration proximity switch is arranged on the right side of the cylinder head of described oil cylinder as another group; Corresponding, each left side saving described telescopic boom arranges verification check-out console, and each right side saving described telescopic boom arranges described deceleration inspection panel.
4. arm level detecting apparatus as claimed in claim 3, it is characterized in that: described deceleration proximity switch comprises stretches deceleration proximity switch and the fast proximity switch of reduction, stretching deceleration proximity switch described in several is arranged near anterior position on the right side of described cylinder head, and the fast proximity switch of several described reductions is arranged on the position near rear portion on the right side of described cylinder head.
5. arm level detecting apparatus as claimed in claim 4, it is characterized in that: described in stretch deceleration proximity switch and described reduction speed proximity switch divide two rows arrange, stretching deceleration proximity switch described in each is arranged on same row along described oil cylinder movement direction, and the fast proximity switch of each described reduction is arranged on same row along described oil cylinder movement direction.
6. arm level detecting apparatus as claimed in claim 5, is characterized in that: described verification proximity switch is four, described in stretch deceleration proximity switch be two, the fast proximity switch of described reduction is two.
7. arm level detecting apparatus as claimed in claim 3, is characterized in that: on the floating nylon block on the left of the cylinder head that several described verification proximity switch is arranged on described oil cylinder; On floating nylon block on the right side of the cylinder head that several described deceleration proximity switch is arranged on described oil cylinder.
8. the arm level detecting apparatus as described in any one of claim 2-7, is characterized in that: also comprise controller, and described controller is electrically connected described length measurement sensor, verification proximity switch and deceleration proximity switch.
9. a hoisting crane, is characterized in that: comprise the arm level detecting apparatus as described in any one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420600803.6U CN204224144U (en) | 2014-10-16 | 2014-10-16 | A kind of arm level detecting apparatus and hoisting crane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420600803.6U CN204224144U (en) | 2014-10-16 | 2014-10-16 | A kind of arm level detecting apparatus and hoisting crane |
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| CN204224144U true CN204224144U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420600803.6U Withdrawn - After Issue CN204224144U (en) | 2014-10-16 | 2014-10-16 | A kind of arm level detecting apparatus and hoisting crane |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105197820A (en) * | 2014-10-16 | 2015-12-30 | 徐州重型机械有限公司 | Arm position detection device, method and crane |
| CN108249309A (en) * | 2017-12-12 | 2018-07-06 | 湖南百特随车起重机有限公司 | A kind of single cylinder telescoping boom length sensing device |
-
2014
- 2014-10-16 CN CN201420600803.6U patent/CN204224144U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105197820A (en) * | 2014-10-16 | 2015-12-30 | 徐州重型机械有限公司 | Arm position detection device, method and crane |
| CN105197820B (en) * | 2014-10-16 | 2017-08-08 | 徐州重型机械有限公司 | A kind of arm level detecting apparatus, method and crane |
| CN108249309A (en) * | 2017-12-12 | 2018-07-06 | 湖南百特随车起重机有限公司 | A kind of single cylinder telescoping boom length sensing device |
| CN108249309B (en) * | 2017-12-12 | 2020-01-10 | 湖南百特随车起重机有限公司 | Single-cylinder telescopic boom length sensing device |
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