CN201747694U - Single-cylinder pin oil cylinder and telescopic arm and crane with same - Google Patents
Single-cylinder pin oil cylinder and telescopic arm and crane with same Download PDFInfo
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- CN201747694U CN201747694U CN2010202629778U CN201020262977U CN201747694U CN 201747694 U CN201747694 U CN 201747694U CN 2010202629778 U CN2010202629778 U CN 2010202629778U CN 201020262977 U CN201020262977 U CN 201020262977U CN 201747694 U CN201747694 U CN 201747694U
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Abstract
The utility model discloses a single-cylinder pin oil cylinder which comprises a cylinder barrel, a cylinder rod and a magnetostrictive displacement transducer, wherein the cylinder barrel and the cylinder rod are matched with each other, the bottom of the cylinder barrel is fixedly provided with a core pipe which is inserted into the cylinder rod, and the magnetostrictive displacement transducer is arranged in the cylinder rod. Preferably, the magnetostrictive displacement transducer comprises an annular displacement electromagnet, an electronic head, a waveguide pipe and a waveguide wire, wherein the annular displacement electromagnet is fixedly arranged on the core pipe of the cylinder barrel, and the electronic head is fixedly arranged on the cylinder rod; one end of the waveguide pipe is fixedly connected with the electronic head, and the other end of the waveguide pipe penetrates through a middle through hole of the annular displacement electromagnet and extends along the length direction of the oil cylinder; and the waveguide wire is inserted into the waveguide pipe, and one end of the waveguide wire is connected with the electronic head. The single-cylinder pin oil cylinder can fast and exactly measure the displacement of the movement of the oil cylinder, thereby reliably guaranteeing that a cylinder pin and a pin arm can be plugged and unplugged. Furthermore, the utility model also provides a telescopic arm and a crane with the oil cylinder.
Description
Technical field
The utility model relates to technical field of engineering machinery, is specifically related to a kind of single-cylinder bolt oil cylinder and has telescopic boom, the hoist of this oil cylinder.
Background technique
Along with the development of hoister in large tonnage technology, the demand of length of boom is more and more longer; For the telescopic arm support structure, the arm joint number also increases day by day, to satisfy the carrying demand of different applying working conditions by telescopic jib.
At present, be used to control the flexible mode of jib and mainly contain two kinds: the one, the multi-stage expansion oil cylinder adds the rope drainage technique; Another is a single-cylinder bolt extending means technology.Yet, for hoister in large tonnage, being subjected to the restriction of weight and arrangement space, the flexible form of its telescopic arm support can't adopt multi-cylinder rope row structure, that is to say, can only adopt single-cylinder bolt structural type to realize.It is flexible successively in a certain order that single-cylinder bolt extending means technology adopts the drive of inserted pin principle respectively to save telescopic boom, from satisfying the demand of various operating modes.Wherein, cylinder pin oil cylinder and arm pin oil cylinder are to realize telescopic boom and the locking of telescopic oil cylinder and the critical component of release.In the working procedure, need the detection of relative position between the corresponding pin-and-hole on strict control cylinder pin and arm pin and the telescopic boom, stretch out accurately or withdraw to guarantee that each arm saves.
In the prior art, position detecting device is arranged on the outside of telescopic oil cylinder, is made up of reel, the long line of survey and linear transducer, surveys long line one end and is fixed on the reel, and an end is fixed on the moveable element cylinder barrel of telescopic oil cylinder; The long line of survey that is fixed on reel one end is wrapped on the reel, and linear transducer is arranged on the inner rotational velocity and the number of turns that detects reel of reel, and will utilize the above-mentioned parameter information calculations to go out the displacement of testee.In this scheme, survey long line and be wrapped on the reel, every winding one circle linear transducer writes down a secondary data; But after the winding of reel first layer was finished, when continuing to twine the second layer again, the line length of this circle was just more longer than the first layer.That is to say, will make linear transducer length measured and first layer length measured have error, particularly, how corresponding the more error accumulation of the number of plies of winding be also just big more.
Simultaneously, the continuous variation along with surveying long line extrusion also following problem can occur in the measuring phase:
1, along with the long line of survey and the friction of other mechanisms of oil cylinder motion, occurs wearing and tearing or squeezing off;
2, the phenomenon of disorder cable may appear in reel.
Obviously, occur that the problems referred to above just may cause measuring length and actual size has very big deviation, it is inaccurate to cause the arm position to be detected, and can't carry out reliable plug pin operation.
In view of this, demand urgently being optimized design, to improve the displacement accuracy of arm joint at existing single-cylinder bolt oil cylinder.
The model utility content
At above-mentioned defective, the technical problem that the utility model solves is, a kind of single-cylinder bolt oil cylinder that self has the displacement function is provided, and measuring the displacement of oil cylinder motion fast and accurately, thereby provides reliable assurance for the action of plug cylinder arm pin.On this basis, the utility model also provides a kind of telescopic boom, hoist with this oil cylinder.
The single-cylinder bolt oil cylinder that the utility model provides comprises the cylinder barrel and the cylinder bar that match, and the tube end of described cylinder barrel is set with the core pipe that is plugged in the described cylinder bar, also comprises the magnetostrictive displacement sensor that is arranged in the described cylinder bar.
Preferably, described magnetostrictive displacement sensor comprises annular displacement electromagnet, electronics head, waveguide and waveguide filament; Wherein, described annular displacement electromagnet is fixedly installed on the core pipe of described cylinder barrel, and described electronics head is fixedly installed on the described cylinder bar; One end of described waveguide is fixedlyed connected with described electronics head, and its other end passes the middle part through hole of described annular displacement electromagnet and extends along the length direction of oil cylinder; Described waveguide filament is plugged in the described waveguide, and an end is connected with described electronics head.
Preferably, described annular displacement electromagnet is fixedly installed on the external part of described core pipe.
Preferably, the head of described cylinder bar has the indent accommodating part, and described electronics head is built in the described indent accommodating part, and the lead of described electronics head stretches out from the head of described cylinder bar.
Preferably, be provided with seal element in the described indent accommodating part outside the described electronics head.
Preferably, described waveguide filament is specially steel wire.
The telescopic boom that the utility model provides comprises some arm joints and the inner foregoing single-cylinder bolt oil cylinder of arm joint is set.
The hoist that the utility model provides comprises the foregoing telescopic boom hinged with the chassis.
The utility model adopts magnetostrictive senser that the collapsing length of oil cylinder is detected, and has effectively overcome prior art and has detected the not high defective of data precision.Compared with prior art, the single-cylinder bolt oil cylinder that the utility model provides self has the displacement function, can measure the displacement of oil cylinder motion fast and accurately, thereby, improve the security and stability of the flexible operation of arm joint greatly for the action of plug cylinder arm pin provides reliable assurance.
In preferred version of the present utility model, be provided with seal element in the described indent accommodating part in the electronics head outside, corrode the electronics head with the hydraulic oil liquid of avoiding cylinder cavity, further improve the stability of testing precision.
Description of drawings
Fig. 1 is the overall structure schematic representation of hoist described in the embodiment;
Fig. 2 is the sectional view of the described single-cylinder bolt oil cylinder of concrete present embodiment;
Fig. 3 is the partial enlarged drawing of the cylinder barrel bottom of the oil cylinder of single-cylinder bolt shown in Fig. 2;
Fig. 4 is the partial enlarged drawing of the cylinder club head of the oil cylinder of single-cylinder bolt shown in Fig. 2;
Fig. 5 is the schematic representation of the described magnetostrictive displacement sensor of embodiment.
Among the figure:
Embodiment
Core of the present utility model provides a kind of single-cylinder bolt oil cylinder that self has the displacement function, measuring the displacement of oil cylinder motion fast and accurately, thereby provides reliable assurance for the action of plug cylinder arm pin.Specify present embodiment below in conjunction with Figure of description.
See also Fig. 1, the figure shows the overall structure schematic representation of the described hoist of present embodiment.
Main function components such as the chassis of this hoist, winding plant, telescoping boom and power plant and prior art are identical, should be appreciated that those of ordinary skill in the art can realize fully based on technology, so this paper repeats no more.
This hoist has telescopic hoist boom, and this telescopic hoist boom adopts single cylinder bolt-type extending means and the control of single-cylinder bolt oil cylinder respectively to save the flexible of arm; For elaborating the inventive point place of this programme: the single-cylinder bolt oil cylinder, please in the lump referring to Fig. 2, this figure is the sectional view of the described single-cylinder bolt oil cylinder of present embodiment.
As shown in the figure, this single-cylinder bolt oil cylinder comprises cylinder barrel 10 and the cylinder bar 20 that matches, the core pipe 11 that the tube bottom of its cylinder barrel 10 fixedly installs along the oil cylinder length direction, and the movable end of this core pipe 11 is plugged in the cylinder bar 20, to constitute the internal work oil duct.Specifically see also Fig. 3 and Fig. 4, wherein, Fig. 3 is the partial enlarged drawing of the cylinder barrel bottom of the oil cylinder of single-cylinder bolt shown in Fig. 2, and Fig. 4 is the partial enlarged drawing of the cylinder club head of the oil cylinder of single-cylinder bolt shown in Fig. 2.Similarly, the basic structure of cylinder barrel 10 and cylinder bar 20 and between the two work matching relationship and prior art are identical, and this paper repeats no more.
Please in the lump referring to Fig. 5, this figure is the schematic representation of the described magnetostrictive displacement sensor of present embodiment.This magnetostrictive displacement sensor 30 comprises annular displacement electromagnet 31, electronics head 32, waveguide 33 and waveguide filament 34.
In conjunction with shown in Figure 4, annular displacement electromagnet 31 is fixedly installed on the core pipe 11 of cylinder barrel 10, can stretching out or regain synchronous shift with cylinder barrel 10.Be provided with detector arrangement in the electronics head 32, its concrete structure and working principle and prior art are identical, and this electronics head 32 is fixedly installed on the cylinder bar 20, that is to say, for annular displacement electromagnet 31, electronics head 32 is fixed elements.One end of waveguide 33 is fixedlyed connected with electronics head 32, and its other end passes the middle part through hole of annular displacement electromagnet 31 and extends along the length direction of oil cylinder.Waveguide filament 34 is plugged in the waveguide 33, and an end is connected with electronics head 32; Because the better mechanical property of steel wire, and cost is lower; Preferably, waveguide filament is specially steel wire.
Particularly, annular displacement electromagnet 31 is fixedly installed on the external part of core pipe 11, and itself and the 11 concentric settings of core pipe on the basis of satisfying the function needs, have effectively utilized the assembly space of oil cylinder inside.
The fixedly connected mode that should be appreciated that electronics head 32 can adopt multiple structural type, uses needs all in the scope that the application asks for protection as long as satisfy.In this programme, electronics head 32 is built in the head of described cylinder bar 20, as shown in Figure 4, the head 21 of cylinder bar 20 has indent accommodating part 211, electronics head 32 is built in this indent accommodating part 211, and the lead 321 of electronics head 32 stretches out from the head 21 of cylinder bar 20, so that be connected with control gear.
As everyone knows, all there is corrosion function in various degree in hydraulic oil liquid, avoid being built in the influence that the interior electronics oil of cylinder body is subjected to hydraulic oil liquid for this reason, this programme is provided with seal element 35 in the indent accommodating part 211 in electronics head 32 outsides, thereby make electronics head 32 be in the environment of relative sealing, can improve the stability of testing precision.
In the working procedure, the cylinder bar 20 of oil cylinder is fixed on fixedly on the telescopic boom, is fixed on the waveguide 33 of cylinder bar 20 inside and electronics head 32 and also maintains static with respect to fixing telescopic boom; In the oil cylinder telescopic process, cylinder barrel 10 is parts of relative movement, and annular displacement electromagnet 31 is fixed on the movable end of core pipe 11, can stretch out in the lump or recovery movement with the cylinder barrel 10 of oil cylinder.Because annular displacement electromagnet 31 is in the outside of waveguide 33, so have relative movement between annular displacement electromagnet 31 and the waveguide 33; That is to say,, just formed relative displacement between annular displacement electromagnet 31 and the waveguide 33 along with the motion of cylinder barrel 10.
The displacement detecting principle of brief description this programme: oil cylinder is when doing expanding-contracting action, excitation pulse signal can produce pulse ring magnetic field when moving in the waveguide 33 of closed energized circuit, the annular displacement electromagnet 31 that is fixed on simultaneously on the core pipe 11 also produces fixed magnetic field, when intersecting at the fixed magnetic field center, two quadrature fields will produce reversing of a moment to waveguide 33, and in waveguide 33, producing the moment stress wave, this warping stress ripple is propagated to both sides in fixed magnetic field along waveguide 33.In the time of near the driving pulse emission source is arrived in stress wave propagation, electronics head 32 detects this ripple by detection and signal processing; At last, calculating excitation pulse signal by control module sends with detection time and multiply by the distance that speed just can draw measuring point again.
To sum up, the utility model has telescopic displacement measuring accuracy height, measures advantages such as numerical value is accurate by the telescopic oil cylinder of this method of measurement design.On telescopic boom, use this single-cylinder bolt oil cylinder, can accurately detect the oil cylinder displacement, the deviation of displacement can not occur, thereby determine that by this displacement the arm bit position plugs the work of arm pin by magnetostrictive senser.In addition, adopt single-cylinder bolt oil cylinder described in the utility model can cancel long line of cylinder and arm position detecting sensor, saved cost, reduced assembly process, can enhance productivity greatly.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. the single-cylinder bolt oil cylinder comprises the cylinder barrel and the cylinder bar that match, and the tube end of described cylinder barrel is set with the core pipe that is plugged in the described cylinder bar, it is characterized in that, also comprises the magnetostrictive displacement sensor that is arranged in the described cylinder bar.
2. single-cylinder bolt oil cylinder according to claim 1 is characterized in that, described magnetostrictive displacement sensor comprises:
Annular displacement electromagnet is fixedly installed on the core pipe of described cylinder barrel;
The electronics head is fixedly installed on the described cylinder bar;
Waveguide, the one end is fixedlyed connected with described electronics head, and its other end passes the middle part through hole of described annular displacement electromagnet and extends along the length direction of oil cylinder; With
Waveguide filament is plugged in the described waveguide, and an end is connected with described electronics head.
3. single-cylinder bolt oil cylinder according to claim 2 is characterized in that, described annular displacement electromagnet is fixedly installed on the external part of described core pipe.
4. single-cylinder bolt oil cylinder according to claim 3 is characterized in that the head of described cylinder bar has the indent accommodating part, and described electronics head is built in the described indent accommodating part, and the lead of described electronics head stretches out from the head of described cylinder bar.
5. single-cylinder bolt oil cylinder according to claim 4 is characterized in that, is provided with seal element in the described indent accommodating part in the described electronics head outside.
6. single-cylinder bolt oil cylinder according to claim 2 is characterized in that described waveguide filament is specially steel wire.
7. telescopic boom comprises some arms joints and the inner single-cylinder bolt oil cylinder of arm joint is set, and it is characterized in that, described single-cylinder bolt oil cylinder is specifically as in the claim 1 to 6 as described in each.
8. hoist comprises the telescopic boom hinged with the chassis, it is characterized in that, described telescopic boom is specifically as described in the claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202629778U CN201747694U (en) | 2010-07-15 | 2010-07-15 | Single-cylinder pin oil cylinder and telescopic arm and crane with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202629778U CN201747694U (en) | 2010-07-15 | 2010-07-15 | Single-cylinder pin oil cylinder and telescopic arm and crane with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201747694U true CN201747694U (en) | 2011-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202629778U Expired - Lifetime CN201747694U (en) | 2010-07-15 | 2010-07-15 | Single-cylinder pin oil cylinder and telescopic arm and crane with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201747694U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491198A (en) * | 2011-11-29 | 2012-06-13 | 三一汽车起重机械有限公司 | Single-cylinder bolt oil cylinder, and telescopic boom device and crane having single-cylinder bolt oil cylinder |
| CN102992208A (en) * | 2011-09-07 | 2013-03-27 | 埃普斯***重机有限公司 | Telescopic crane arm and crane having the same |
| CN103754768A (en) * | 2014-01-20 | 2014-04-30 | 安徽柳工起重机有限公司 | Free expansion control system of crane truck boom |
| CN105197821A (en) * | 2015-09-07 | 2015-12-30 | 徐州重型机械有限公司 | Telescopic system capable of preventing core tube from inhaling empty and crane |
| CN105221520A (en) * | 2015-11-02 | 2016-01-06 | 长治清华机械厂 | Order oil cylinder |
| 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 |
| CN112173995A (en) * | 2020-09-27 | 2021-01-05 | 徐州徐工液压件有限公司 | Core-tube-free single-drive-type telescopic hydraulic cylinder |
| CN112746745A (en) * | 2020-12-25 | 2021-05-04 | 湖南工业职业技术学院 | Cantilever crane structure for concrete pump truck |
-
2010
- 2010-07-15 CN CN2010202629778U patent/CN201747694U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992208A (en) * | 2011-09-07 | 2013-03-27 | 埃普斯***重机有限公司 | Telescopic crane arm and crane having the same |
| CN102491198B (en) * | 2011-11-29 | 2014-09-10 | 三一汽车起重机械有限公司 | Single-cylinder bolt oil cylinder, and telescopic boom device and crane having single-cylinder bolt oil cylinder |
| CN102491198A (en) * | 2011-11-29 | 2012-06-13 | 三一汽车起重机械有限公司 | Single-cylinder bolt oil cylinder, and telescopic boom device and crane having single-cylinder bolt oil cylinder |
| CN103754768B (en) * | 2014-01-20 | 2016-03-02 | 安徽柳工起重机有限公司 | Free expansion control system of crane truck boom |
| CN103754768A (en) * | 2014-01-20 | 2014-04-30 | 安徽柳工起重机有限公司 | Free expansion control system of crane truck boom |
| CN105197821A (en) * | 2015-09-07 | 2015-12-30 | 徐州重型机械有限公司 | Telescopic system capable of preventing core tube from inhaling empty and crane |
| CN105197821B (en) * | 2015-09-07 | 2017-03-01 | 徐州重型机械有限公司 | Telescopic system and crane that the anti-core pipe of energy is emptied |
| CN105221520A (en) * | 2015-11-02 | 2016-01-06 | 长治清华机械厂 | Order oil cylinder |
| 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 |
| CN112173995A (en) * | 2020-09-27 | 2021-01-05 | 徐州徐工液压件有限公司 | Core-tube-free single-drive-type telescopic hydraulic cylinder |
| WO2022062180A1 (en) * | 2020-09-27 | 2022-03-31 | 徐州徐工液压件有限公司 | Single-driving type telescopic hydraulic cylinder without core tube |
| CN112746745A (en) * | 2020-12-25 | 2021-05-04 | 湖南工业职业技术学院 | Cantilever crane structure for concrete pump truck |
| CN112746745B (en) * | 2020-12-25 | 2021-10-22 | 湖南工业职业技术学院 | Cantilever crane structure for concrete pump truck |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110216 |
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| CX01 | Expiry of patent term |