CN103332617B - Extension and retraction protection device and method for suspension arm barrel of automobile crane and automobile crane - Google Patents
Extension and retraction protection device and method for suspension arm barrel of automobile crane and automobile crane Download PDFInfo
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- CN103332617B CN103332617B CN201310312346.0A CN201310312346A CN103332617B CN 103332617 B CN103332617 B CN 103332617B CN 201310312346 A CN201310312346 A CN 201310312346A CN 103332617 B CN103332617 B CN 103332617B
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Abstract
The invention discloses an extension and retraction protection device and an extension and retraction protection method for a suspension arm barrel of an automobile crane and the automobile crane. A load measuring device and a control device are connected to a CAN (Controller Area Network) bus. The method comprises the following steps that in the extension and retraction process of the suspension arm barrel, the load measuring device acquires the practical load of an oil cylinder for driving the suspension arm barrel to extend and retract, and transmits the practical load to the control device; and when the control device judges that the practical load is larger than a preset on-load extension and retraction load threshold value, the control device controls the automobile crane to stop the extension and retraction operation of the suspension arm barrel. According to the extension and retraction protection device and the extension and retraction protection method for the suspension arm barrel of the automobile crane and the automobile crane disclosed by the invention, the on-load extension and retraction actions can be limited, and a customer is prevented from forcibly performing on-load extension and retraction on a vehicle without an on-load extension and retraction function, so that the extension and retraction oil cylinder and relevant executing elements are protected from being damaged, the service life the vehicle is prolonged, and the operating security of a user is improved.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to fender guard, car hosit and method that a kind of Car Crane Retractable Arms cylinder is flexible.
Background technology
Car hosit drives arm cylinder to complete expanding-contracting action by the telescopic oil cylinder being positioned at arm cylinder inside, and arm cylinder self has certain weight, and oil cylinder will bear these weight in the process being with swing arm cylinder to stretch.The actual supporting power of oil cylinder calculates with maximum static lotus, and arm cylinder weight, within the scope of the load-bearing of oil cylinder, can not damage oil cylinder, if hang loads in telescopic process, the weight of weight and arm cylinder is added up and exceeded the load-bearing scope of oil cylinder, will cause damage to oil cylinder.
General hoisting crane does not possess band and carries Telescopic, and is not limited a band year expanding-contracting action yet.There is violation operation in market upper part user, the vehicle not possessing this function is carried out band by force and carries flexible.Band carries to stretch and part power element can be caused to damage, such as: damage telescopic oil cylinder sealing and cause the fault such as leakage of oil, the damage of rope row bracket; Long band carries to stretch and telescopic oil cylinder can be caused to scrap, as piston rod is pulled, bent.
At present, usually judge whether that overload limits expanding-contracting action by moment percentum, to time flexible whether with carry without any restriction.Moment percentum: the ratio of the stall torque that actual lift heavy amount can be born calculated the moment and this operating mode got by limiter of moment under under certain amplitude and brachium operating mode.Same hoisting capacity, at operating mode difference (as the crane arm elevation angle, brachium etc.), moment percentum is different.When as basic arm or galianconism length, even if weight is 500Kg, because now maximum authorized payload is very large, so moment percentum is very little, only has 1%-5%; But when long-armed length, even if weight is 200Kg, because now maximum authorized payload is less, so moment percentum is very large, 50%-80%(especially full semi-girder, auxiliary operating mode can be reached).
That is, basic arm or galianconism long time, in the scope that moment percentum allows, user can hang in violation of rules and regulations carries a very heavy weight object, and the larger damage rate caused telescopic oil cylinder of weight quality is more serious.Even if User Violations operates, hang when telescopic boom and carry heavy weight object, as long as now moment percentum is no more than 100%, expanding-contracting action all can carry out.Stretch if user is with to carry for a long time in violation of rules and regulations, damage certainly will be caused to power element and telescopic oil cylinder.
Therefore, fender guard, method that a kind of new Car Crane Retractable Arms cylinder is flexible is needed.
Summary of the invention
In view of this, the technical matters that the present invention will solve is to provide the flexible fender guard of a kind of Car Crane Retractable Arms cylinder, carries flexible load threshold value judge whether to carry out arm cylinder scaling operation according to band.
The fender guard that Car Crane Retractable Arms cylinder is flexible, comprising: load-measuring device and control setup; Described load-measuring device and described control setup are connected in CAN; Wherein, in the process that arm cylinder is flexible, described load-measuring device obtains the actual payload of the oil cylinder driving arm cylinder to shrink, and described actual payload is sent to described control setup; When described control setup judge described actual payload be greater than default band carry flexible load threshold value time, described control setup controls described car hosit and stops arm cylinder scaling operation.
According to an embodiment of device of the present invention, further, described load-measuring device comprises: be arranged on the pressure sensor in the oil cylinder chamber of described oil cylinder and rodless cavity.
According to an embodiment of device of the present invention, further, also comprise: store the memory storage that described band carries flexible load threshold value.
According to an embodiment of device of the present invention, further, also comprise: read out instrument; Described read out instrument is electrically connected with described control setup.
According to an embodiment of device of the present invention, further, also comprise: annunciator or alarm lamp; Described annunciator or alarm lamp are all electrically connected with described control setup.
According to an embodiment of device of the present invention, further, described load-measuring device also comprises: height limitator and angular transducer.
A kind of car hosit, comprises the fender guard that Car Crane Retractable Arms cylinder as above is flexible.
The technical matters that the present invention will solve is to provide the flexible guard method of a kind of Car Crane Retractable Arms cylinder, carries flexible load threshold value judge whether to carry out arm cylinder scaling operation according to band.
The guard method that Car Crane Retractable Arms cylinder is flexible, comprising: in the process that arm cylinder is flexible, and load-measuring device obtains the actual payload of the oil cylinder driving arm cylinder to shrink, and described actual payload is sent to described control setup; When described control setup judge described actual payload be greater than default band carry flexible load threshold value time, described control setup controls described car hosit and stops arm cylinder to stretch; Wherein, described load-measuring device and described control setup are all connected in CAN.
According to one embodiment of the method for the invention, further, described load-measuring device, by being arranged on the pressure sensor in the oil cylinder chamber of described oil cylinder and rodless cavity, obtains described actual payload.
According to one embodiment of the method for the invention, further, described actual payload is shown on the display apparatus and described band carries flexible load threshold value; When described control setup judge described actual payload be greater than default band carry flexible load threshold value time, described control setup controls described car hosit and stops arm cylinder to stretch, and controls annunciator and give the alarm or control alarm lamp flicker
Fender guard, car hosit and method that Car Crane Retractable Arms cylinder of the present invention is flexible; expanding-contracting action can be carried to band to limit; avoid client on the vehicle not possessing band and carry Telescopic by force band carry flexible; protection telescopic oil cylinder and relevant power element not damaged; extend the service life of vehicle, enhance the safety of user in operating process.
Description of the invention provides in order to example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is in order to principle of the present invention and practical application are better described, and enables those of ordinary skill in the art understand the present invention thus design the various embodiments with various amendment being suitable for special-purpose.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of an embodiment of the fender guard that Car Crane Retractable Arms cylinder according to the present invention stretches;
Fig. 2 is the diagram of circuit of an embodiment of the guard method that Car Crane Retractable Arms cylinder according to the present invention stretches;
Fig. 3 is the diagram of circuit of another embodiment of the guard method that Car Crane Retractable Arms cylinder according to the present invention stretches.
Detailed description of the invention
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is the schematic diagram of an embodiment of the fender guard that Car Crane Retractable Arms cylinder according to the present invention stretches.As shown in Figure 1: the fender guard that Car Crane Retractable Arms cylinder stretches comprises: load-measuring device 2 and control setup 3.
Load-measuring device 2 and control setup 1 are connected in CAN.CAN is that Controller Area Network abridges, and belonging to the category of fieldbus, is a kind of serial communication bus of multiple host pattern.Any node on network all initiatively can send message.When bus free, all nodes all can start to send message.The node of accessing bus at first can obtain transmission route.When multiple node sends simultaneously, carry out bus access control according to the preceence of message instead of the preceence of node.
What CAN realized is data communication between load-measuring device 2 and control setup 3, and other bus mode also can be adopted to realize data communication.
In the process that arm cylinder is flexible, load-measuring device 2 obtains the actual payload of the oil cylinder 6 driving arm cylinder to shrink, and actual payload is sent to control setup 1.
When control setup 1 judge actual payload be greater than default band carry flexible load threshold value time, control setup 1 controls car hosit and stops arm cylinder scaling operation.
According to one embodiment of present invention, load-measuring device 2 comprises the pressure sensor in the oil cylinder chamber and rodless cavity being arranged on oil cylinder 6.
Band carries a flexible load threshold value and can be stored in control setup 1, also can arrange memory storage 4 file and carry flexible load threshold value.Read out instrument 3 is electrically connected with control setup 1.Annunciator 5 or alarm lamp are electrically connected with control setup 1.
Load-measuring device also comprises: height limitator and angular transducer, for measuring the lifting angle of arm, carries out spacing to the height of arm.
According to one embodiment of present invention, after the pressure sensor be arranged on amplitude oil cylinder rod chamber and rodless cavity measures actual payload, control setup 1 is entered through converting, drawn through complicated calculations by control setup 1 in conjunction with hoisting crane performance structure parameter, wherein the performance structure parameter of hoisting crane is stored in memory storage 4.
According to one embodiment of present invention, filtering process is carried out to actual payload (load-carrying) value measured.The filtering method adopted has multiple, such as, the impact due to pressure can cause the momentary fluctuation of actual load-carrying, arranges a time period, the multiple load signal of continuous acquisition, then signal is sorted, remove excessive, too small signal, the part in the middle of only retaining, different weights is got again according to the time point gathered, then carry out cumulative and be averaged, using aviation value as the actual payload after process, reaching the object of filtering process.
Carry flexible load threshold value (bigger than normal than light mass) according to band to limit a band year expanding-contracting action, and when bump, only filtering process is carried out to the load of actual measurement.When band carries protection restriction, handle must be got back to meta and again open, can stretch.
Handle refers to bar handle, for gathering the demand of user, such as: user needs weight to put down, just by handle driven forward; User needs lifting heavy, is just promoted backward by handle.
Again open after handle must being returned meta, if initial condition (i.e. meta) do not got back to by user's handle, now the signal of handle is in larger state, if user activates relevant restriction, hoisting crane can be jerked, larger impact can be caused, for equipment and personnel, all there is certain danger; If but handle gets back to initial condition (i.e. meta) now without any action executing, then user carries out action at driving handle, now because the incoming signal of user is excessively inputting to large-signal by the mitigation of less signal, the action now controlled can slowly increase from slow to fast, the impact of hoisting crane action is little, is all safer relative to personnel and equipment.
For certain car model hoisting crane, carry out multiple stage test, under different operating modes, with maximum handle openings, maximum throttle is tested, and the actual lift heavy amount of display is the actual suspension hook 0.5t of 1.5t(to the maximum), thus select maximum weight to be amplified to 2.5t.
Calculate because oil cylinder is actual with maximum static lotus, namely a small amount of band carries and can not damage oil cylinder, additionally by the design of value bigger than normal, can eliminate certain system pressure fluctuation, impact impact for Rule of judgment.
According to one embodiment of present invention, a kind of car hosit comprises the fender guard that Car Crane Retractable Arms cylinder as above stretches.
Fig. 2 is the diagram of circuit of an embodiment of the guard method that Car Crane Retractable Arms cylinder according to the present invention stretches.As shown in Figure 2:
Step 201, in the process that arm cylinder is flexible, load-measuring device obtains the actual payload of the oil cylinder driving arm cylinder to shrink, and actual payload is sent to control setup.
Step 202, when control setup judge actual payload be greater than default band carry flexible load threshold value time, control setup controls car hosit and stops arm cylinder to stretch.Load-measuring device and control setup are all connected in CAN.
According to one embodiment of present invention, load-measuring device, by being arranged on the pressure sensor in the oil cylinder chamber of oil cylinder and rodless cavity, obtains actual payload.
Show actual payload and band year flexible load threshold value on the display apparatus.When control setup judge actual payload be greater than default band carry flexible load threshold value time, control setup controls car hosit and stops arm cylinder to stretch, and controls annunciator and give the alarm or control alarm lamp flicker.
Fig. 3 is the diagram of circuit of another embodiment of the guard method that Car Crane Retractable Arms cylinder according to the present invention stretches.As shown in Figure 3:
Step 301, load-measuring device obtains the actual payload of the oil cylinder driving arm cylinder to shrink, and by CAN, actual payload is sent to control setup.
Step 302, carries out filtering process to the actual negative charge values measured.
Due to the impact effect of automobile hydraulic system, can there is the problem that actual lift heavy amount is excessive instantaneously, this just may cause the erroneous judgement of limit movement, for this problem, filtering process is carried out to the actual measurement weight (AMW) value received from CAN, eliminates this moment impact.
Step 304 and 305, when control setup judge actual payload be greater than default band carry flexible load threshold value time, control setup controls car hosit and stops arm cylinder to stretch.
In order to strengthen safety, avoid bump, after occurring that band carries flexible restriction, again open after handle must being got back to meta, and actual lift heavy amount is less than preset value, can action just stretch.
Fender guard, car hosit and method that Car Crane Retractable Arms cylinder of the present invention stretches not only meet the demand of user, also will protect the safety of vehicle and user to greatest extent simultaneously.
On the one hand can carry an expanding-contracting action to band limit, avoid client on the vehicle not possessing band and carry Telescopic by force band carry flexible, protection telescopic oil cylinder and relevant power element not damaged, extend the service life of vehicle.
Filter function and handle return middle bit function in addition, eliminate the erroneous judgement that the reasons such as impact cause, and not only ensure that the accuracy of qualifications, also enhance the safety of user in operating process.
Method and system of the present invention may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes method and system of the present invention.Said sequence for the step of method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Claims (8)
1. the fender guard that Car Crane Retractable Arms cylinder is flexible, is characterized in that, comprising:
Load-measuring device and control setup; Described load-measuring device and described control setup are connected in CAN;
Wherein, in the process that arm cylinder is flexible, described load-measuring device obtains the actual payload of the oil cylinder driving arm cylinder to shrink, and described actual payload is sent to described control setup; Filtering process is carried out to the actual negative charge values measured, when described control setup judge described actual payload be greater than default band carry flexible load threshold value time, described control setup controls described car hosit and stops arm cylinder scaling operation;
Described load-measuring device comprises: be arranged on the pressure sensor in the oil cylinder chamber of described oil cylinder and rodless cavity.
2. device as claimed in claim 1, is characterized in that:
Also comprise: store the memory storage that described band carries flexible load threshold value.
3. device as claimed in claim 1, is characterized in that:
Also comprise: read out instrument;
Described read out instrument is electrically connected with described control setup.
4. device as claimed in claim 1, is characterized in that:
Also comprise: annunciator or alarm lamp;
Described annunciator or alarm lamp are all electrically connected with described control setup.
5. device as claimed in claim 1, is characterized in that:
Described load-measuring device also comprises: height limitator and angular transducer.
6. a car hosit, is characterized in that, comprising:
The fender guard that Car Crane Retractable Arms cylinder as described in any one of claim 1 to 5 is flexible.
7. the guard method that Car Crane Retractable Arms cylinder is flexible, is characterized in that, comprising:
In the process that arm cylinder is flexible, load-measuring device obtains the actual payload of the oil cylinder driving arm cylinder to shrink, and described actual payload is sent to control setup;
Filtering process is carried out to the actual negative charge values measured;
When described control setup judge described actual payload be greater than default band carry flexible load threshold value time, described control setup controls described car hosit and stops arm cylinder to stretch;
Wherein, described load-measuring device and described control setup are all connected in CAN;
Described load-measuring device, by being arranged on the pressure sensor in the oil cylinder chamber of described oil cylinder and rodless cavity, obtains described actual payload.
8. method as claimed in claim 7, is characterized in that:
Show described actual payload on the display apparatus and described band carries flexible load threshold value;
When described control setup judge described actual payload be greater than default band carry flexible load threshold value time, described control setup controls described car hosit and stops arm cylinder to stretch, and controls annunciator and give the alarm or control alarm lamp flicker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312346.0A CN103332617B (en) | 2013-07-24 | 2013-07-24 | Extension and retraction protection device and method for suspension arm barrel of automobile crane and automobile crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310312346.0A CN103332617B (en) | 2013-07-24 | 2013-07-24 | Extension and retraction protection device and method for suspension arm barrel of automobile crane and automobile crane |
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| Publication Number | Publication Date |
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| CN103332617A CN103332617A (en) | 2013-10-02 |
| CN103332617B true CN103332617B (en) | 2015-06-17 |
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| CN201310312346.0A Active CN103332617B (en) | 2013-07-24 | 2013-07-24 | Extension and retraction protection device and method for suspension arm barrel of automobile crane and automobile crane |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107651565B (en) * | 2017-08-28 | 2019-07-19 | 北汽福田汽车股份有限公司 | A kind of method of inspection, device and the limiter of moment of Car Crane Retractable Arms operating condition |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2210852A2 (en) * | 2009-01-21 | 2010-07-28 | Manitowoc Crane Companies, LLC | Hydraulic system thermal contraction compensation apparatus and method |
| CN102431919A (en) * | 2011-10-14 | 2012-05-02 | 三一汽车起重机械有限公司 | Crane, telescopic arm, telescopic action protection device and method thereof |
| CN202704896U (en) * | 2012-06-28 | 2013-01-30 | 三一汽车起重机械有限公司 | Crane and protection device for telescopic boom of same |
| CN203428829U (en) * | 2013-07-24 | 2014-02-12 | 徐州重型机械有限公司 | Device for protecting stretching and contracting of boom cylinder of automobile crane, and automobile crane |
-
2013
- 2013-07-24 CN CN201310312346.0A patent/CN103332617B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2210852A2 (en) * | 2009-01-21 | 2010-07-28 | Manitowoc Crane Companies, LLC | Hydraulic system thermal contraction compensation apparatus and method |
| CN102431919A (en) * | 2011-10-14 | 2012-05-02 | 三一汽车起重机械有限公司 | Crane, telescopic arm, telescopic action protection device and method thereof |
| CN202704896U (en) * | 2012-06-28 | 2013-01-30 | 三一汽车起重机械有限公司 | Crane and protection device for telescopic boom of same |
| CN203428829U (en) * | 2013-07-24 | 2014-02-12 | 徐州重型机械有限公司 | Device for protecting stretching and contracting of boom cylinder of automobile crane, and automobile crane |
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| CN103332617A (en) | 2013-10-02 |
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Address after: 221001 Jiangsu city of Xuzhou Province Economic and Technological Development Zone of High Road No. 68 Patentee after: Xuzhou Heavy Machinery Co., Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Patentee before: Xuzhou Heavy Machinery Co., Ltd. |
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