CN102734262A - Driving cylinder and crane and engineering machinery with same - Google Patents
Driving cylinder and crane and engineering machinery with same Download PDFInfo
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- CN102734262A CN102734262A CN2012102412632A CN201210241263A CN102734262A CN 102734262 A CN102734262 A CN 102734262A CN 2012102412632 A CN2012102412632 A CN 2012102412632A CN 201210241263 A CN201210241263 A CN 201210241263A CN 102734262 A CN102734262 A CN 102734262A
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Abstract
The invention provides a driving cylinder, a crane with the driving cylinder and engineering machinery with the driving cylinder. The driving cylinder includes: the hydraulic cylinder comprises a main cylinder barrel (21), a main piston rod (26) and a locking device, wherein the locking device is arranged outside the driving cylinder and comprises a locking state and an unlocking state, the main piston rod (26) is locked at a locking position relative to the main cylinder barrel (21) in the locking state, and the main piston rod (26) can freely stretch and retract in the main cylinder barrel (21) in the unlocking state. According to the driving cylinder, the locking and unlocking of the driving cylinder are realized through the locking device arranged outside the driving cylinder, so that the maintenance work of the locking device is facilitated, and the working state of the locking device is easy to detect and observe.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, relate to a kind of drive cylinder and have the hoist and the engineering machinery of this drive cylinder.
Background technique
Development along with industries such as wind-powered electricity generation, nuclear power, chemical industry; Component are modularization and maximization day by day; Increasing demand to hoister in large tonnage increases, and requires crane hoisting height and lifted load to increase, and telescopic arm crane therefore commonly used just develops towards the maximization direction.But high lifting altitude rises load and will cause the component on the principal arm shear direction bigger with restarting; Make that the amount of deflection of principal arm in the luffing plane is bigger; And the principal arm less stable of plane of rotation; Even also can't address the above problem through increasing thinkings such as principal arm length, optimization principal arm shape, the principal arm sectional dimension that increases, the raising principal arm strength of materials, therefore need to promote principal arm lifting altitude and lifting capacity through improving the arm force-bearing situation by auxiliary device; To satisfy the requirement of market, has the telescopic arm crane of super lifting device thereby be born to hoister in large tonnage.But super lifting device still exists some problems to be further improved and promotes at present, and is wherein bigger in order to realize necessary its size of bearing capacity and weight with the matching used compensating cylinder of super lifting device, and should adopt the oil cylinder with latch functions.
For in the Chinese utility model patent of CN201412409Y a kind of mechanical self-latching oil cylinder is disclosed at notice of authorization number, wherein, when the oil inlet hole oil-feed of back; The piston rod withdrawal, after nut got into positioning block, nut promoted the steel ball come-up; After piston rod movement to steel ball blocked briquetting, briquetting stopped to move, and piston rod drive nut compresses first spring and second spring continues to left movement; Steel ball begins to fall in the dovetail groove of nut, and briquetting also is moved to the left under the effect of first spring and downward pressing steel balls, when steel ball is fallen in the dovetail groove fully; Piston is run into the stop motion of cylinder bottom piston rod, and briquetting is also shut with being about to steel ball top, and steel ball can't float; Be stuck in the dovetail groove, thereby play automatic locking effect; Current oil inlet hole oil-feed, the hydraulic drive piston motion, when piston moves right because Steel Cable Baffle Ring spacing drives briquetting and moves together, and when the motion certain distance, steel ball moves along the piston rod radially outward, release, piston rod stretches out.
But disclosed mechanical self-latching oil cylinder has two shortcomings in the above existing technology: 1, self-locking mechanism is all inner at oil cylinder, is difficult for detecting and observing; 2, the self-locking mechanism bearing load is limited, is not suitable for the bigger occasion of carrying.
Summary of the invention
The object of the invention is to provide a kind of and has Locking Device and Locking Device is easy to safeguard, state is easy to the drive cylinder that detects and observe and have the hoist and the engineering machinery of this drive cylinder.
The invention provides a kind of drive cylinder; Comprise: master cylinder tube and main piston rod, drive cylinder also comprise Locking Device, are arranged at the drive cylinder outside; Locking Device comprises lockup state and released state; Be locked in the lock position at the lockup state main piston rod with respect to the master cylinder tube, at released state, main piston rod can freely stretch in the master cylinder tube.
Further, the lock position is the full reduced position in the whole retraction master cylinder of the main piston rod tube.
Further, Locking Device comprises: first hooking part is arranged on the master cylinder tube; Second hooking part is arranged on the main piston rod, and second hooking part matches then with first hooking part that Locking Device is in lockup state, and second hooking part and first hooking part are removed and cooperated then that Locking Device is in released state.
Further, Locking Device also comprises the locking drive unit, and wherein, the locking drive unit is arranged on the master cylinder tube and with first hooking part and links to each other, and is used to drive first hooking part and matches with second hooking part and remove cooperation.
Further, first hooking part is articulated on the master cylinder tube end near main piston rod; Second hooking part is fixed on the main piston rod end away from the master cylinder tube; The locking drive unit is connected with first hooking part with the master cylinder tube respectively.
Further, first hooking part comprises block, and block and master cylinder tube are hinged and comprise draw-in groove; Second hooking part comprises the projection that is used for the draw-in groove snap fit; The locking drive unit comprises the locking drive cylinder, and the locking drive cylinder comprises locking cylinder barrel and lockup piston bar, and in locking cylinder barrel and the lockup piston bar one hinged with the master cylinder tube, and another and block are hinged.
Further, two projections are symmetrically arranged in the main piston rod both sides; Block comprises respectively two draw-in grooves that are equipped with two projections.
Further, the side away from the master cylinder tube comprises first arc surface on the projection; The draw-in groove of block comprises and is used for second arc surface that cooperates with first arc surface.
Further, block comprises the block inclined-plane, and the block inclined-plane is arranged at the outer surface of block near main piston rod one side; Projection comprises the projection inclined-plane that cooperates slidably with the block inclined-plane, and the projection inclined-plane is arranged on the surface of projection near master cylinder tube one side.
Further, drive cylinder also comprises and is used to detect the lockup state of Locking Device and/or the detection device of released state.
Further, detection device comprises: first detection unit is used to detect the lockup state of Locking Device; Second detection unit is used to detect the released state of Locking Device.
Further, drive cylinder also comprises and is used to detect the lockup state of Locking Device and/or the detection device of released state.
Further, detection device comprises: first Detecting element is arranged at the outer wall of master cylinder tube; First sense cell is arranged on the block, and Locking Device is when being in released state, and first sense cell is in the induction zone of first Detecting element.
Further, detection device comprises: second Detecting element is arranged on the block; Second sense cell is arranged on the main piston rod, and Locking Device is when being in the lock state, and second sense cell is in the induction zone of second Detecting element.
The present invention also provides a kind of hoist, comprises super lifting device and is arranged at the compensating cylinder on the super lifting device, and compensating cylinder is aforesaid drive cylinder.
The present invention also provides a kind of engineering machinery, comprises aforesaid drive cylinder.According to drive cylinder of the present invention, through realizing the locking and the release of drive cylinder at the Locking Device of drive cylinder outer installment, thereby be convenient to the maintenance work of Locking Device, and make the working state of Locking Device detect easily and observe.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation according to the embodiment of the hoist with compensating cylinder of the present invention;
Fig. 2 is the structural representation according to the drive cylinder of the first embodiment of the present invention; And
Fig. 3 is the structural representation of drive cylinder according to a second embodiment of the present invention.
Embodiment
Below with reference to accompanying drawing and combine embodiment to specify the present invention.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
In following examples; Be that example is explained drive cylinder of the present invention, hoist and engineering machinery only with hoist with super lifting device and compensating cylinder and the compensating cylinder of wherein using; But the present invention is not limited to this; For example, drive cylinder also can be pneumatic cylinder, drive cylinder of the present invention for example also can be applied on the engineering machinery such as pump truck and other all be suitable for using the occasion of drive cylinder with auto-lock function.
Drive cylinder of the present invention comprises master cylinder tube, main piston rod and Locking Device.Locking Device is arranged at the drive cylinder outside, and Locking Device comprises lockup state and released state, is locked in the lock position at the lockup state main piston rod with respect to the master cylinder tube, and at released state, main piston rod can freely stretch in the master cylinder tube.Preferably, the lock position is the full reduced position in the whole retraction master cylinder of the main piston rod tube.According to drive cylinder of the present invention, through realizing the locking and the release of drive cylinder at the Locking Device of drive cylinder outer installment, thereby be convenient to the maintenance work of Locking Device, and make the working state of Locking Device detect easily and observe.When the lock position is in lockup state when Locking Device; Can bear at least the portion of external pulling force and drive cylinder itself is not stressed or few stressed by Locking Device; Make drive cylinder can when the lock position, carry big load, help reducing the drive cylinder size, alleviate drive cylinder weight.
Hoist of the present invention mainly comprises super lifting device 9 and is arranged at the compensating cylinder 2 on the super lifting device 9 that wherein compensating cylinder 2 has adopted drive cylinder of the present invention.
Fig. 1 shows a specific embodiment that has the hoist of compensating cylinder according to of the present invention.As shown in Figure 1, hoist comprises wire rope 1, compensating cylinder 2, pulley 3, back tensioning means 4, basic arm 5, turntable 6, amplitude oil cylinder 7, has surpassed elevator mechanism 8, super lifting device 9 and principal arm head 10 etc.Super lifting device 9 is installed in basic arm 5 front portions.Wire rope 1 connects the connection of compensating cylinder 2, one ends through pulley 3 one ends and has surpassed elevator mechanism 8.Back tensioning means 4 one ends link to each other with super lifting device 9, and the other end connects the afterbody or the turntable 6 of basic arm 5.Amplitude oil cylinder 7 one ends are connected with basic arm 5, and the other end links to each other with super lifting device 9, can with super lifting device 9 and basic arm 5 be the level of state 90 ° of beginning luffings to basic arm in vertical state.The hoist of this specific embodiment is convenient to the maintenance work of Locking Device, and makes the working state of Locking Device detect easily and observe; When compensating cylinder 2 stretches; Pressure through compensating cylinder 2 self bears outside pulling force to main piston rod; When the compensating cylinder locking; Can rely on Locking Device bear external pull through rational design, so this compensating cylinder has and carry big when flexible but little characteristics of carrying during locking, may be used on carrying very large occasion in theory.
Below the structure of compensating cylinder 2 is specified.
Fig. 2 shows the drive cylinder of the first embodiment of the present invention of oil cylinder 2 by way of compensation.Wherein drive cylinder comprises master cylinder tube 21, locking drive cylinder 22, block 23, fixing pin 24, projection 25 and main piston rod 26.
In first embodiment's drive cylinder, Locking Device has adopted and has comprised first hooking part that is arranged on the master cylinder tube 21 and the bayonet unit that is arranged at second hooking part on the main piston rod 26.Second hooking part matches then with first hooking part that drive cylinder is in lockup state, and second hooking part and first hooking part are removed and cooperated then that drive cylinder is in released state.In first embodiment, when main piston rod 26 was in full reduced position, Locking Device was in lockup state.
Wherein Locking Device also comprises the locking drive unit, and the locking drive unit is arranged on the master cylinder tube 21 and with first hooking part and links to each other, and is used to drive first hooking part and matches with second hooking part or remove cooperation.Preferably, first hooking part is articulated on the master cylinder tube 21 end near main piston rod 26; Second hooking part is fixed in the end away from master cylinder tube 21 of main piston rod 26; And the locking drive unit is connected with first hooking part with master cylinder tube 21 respectively.As shown in Figure 2, particularly, first hooking part comprises block 23 in first embodiment, and block 23 comprises draw-in groove 233; Second hooking part comprises the projection 25 that is used for draw-in groove 233 snap fit, the setting that projection 25 matches with draw-in groove 233.The locking drive unit comprises locking drive cylinder 22.Locking drive cylinder 22 comprises locking cylinder barrel and lockup piston bar, and wherein, the locking cylinder barrel is articulated on the master cylinder tube 21 through otic placode and bearing pin away from an end of lockup piston bar, and the lockup piston bar is hinged away from second joint 232 of end of locking cylinder barrel and block 23.Certainly, the mounting point of locking cylinder barrel and lockup piston bar can be exchanged.First joint 231 of block 23 is hinged through fixing pin 24 and master cylinder tube 21.Block 23 can rotate freely around fixing pin 24.The flexible block 23 that can drive of the lockup piston bar of locking drive cylinder 22 rotates around fixing pin 24.When the lockup piston bar of locking drive cylinder 22 is withdrawn into certain-length, promptly drive block 23 and break away from projection 25, this moment, main piston rod 26 can freely extend, and Locking Device is in released state.
Preferably; Side away from master cylinder tube 21 on the projection 25 comprises first arc surface; And the surface that the draw-in groove 233 of block 23 cooperates with first arc surface comprises second arc surface, and first arc surface and second arc surface can accurately mesh, thereby helps the locking operation of Locking Device to main piston rod 26.
Further preferably, in first embodiment, comprised two projections 25 that are symmetrically arranged in main piston rod 26 axial direction both sides.Corresponding, block 23 comprises respectively two draw-in grooves 233 that are equipped with two projections 25.It is stressed evenly that symmetric arrangement projection and draw-in groove help Locking Device, and strengthened lockup capacity.
As shown in Figure 2, block 23 also comprises block inclined-plane 234, is arranged at the outer surface of block 23 near main piston rod 26 1 sides.Accordingly, projection 25 comprises the projection inclined-plane 251 that cooperates slidably with block inclined-plane 234, is arranged on the surface of projection 25 near master cylinder tube 21 1 sides.When main piston rod 26 retracts to projection 25 when contacting with block 23, because the setting on block inclined-plane 234 and projection inclined-plane 251, and cooperate slidably between the two; Projection 25 gives block 23 and applies a power that block 23 is pushed open, and the lockup piston bar retraction that this can impel locking drive cylinder 22 is opened block 23; When projection 25 arrival relevant position backstops 23 freely fall under the thrust of locking drive cylinder 22; Make projection 25 get into draw-in groove 233 fully, Locking Device is in lockup state, thus main piston rod 26 with respect to master cylinder tube 21 by locking; The suffered pulling force of drive cylinder this moment is pushed with projection 25 by block 23 and bears, and the drive cylinder system does not carry.
Above embodiment's Locking Device should not constitute restriction to drive cylinder of the present invention.For example, can form Locking Device with the principle of electromagnetic mode.Carry out with bayonet unit under the situation of locking at Locking Device, first hooking part and second hooking part also are not limited to the form that the draw-in groove on the above concrete block matches with projection, and various variations can be arranged.In addition; The locking drive unit also is not limited to the locking drive cylinder, for example also can be the electric lock locking apparatus, is being convenient to the little place of manual operation and drive cylinder; Locking drive unit even not necessarily, and only rely on manual work to make to cooperate between block and the projection or remove cooperation.
This first embodiment's drive cylinder has in the telescopic process and to carry less but can bear the characteristics of big load after full reduced; Therefore can the local bearing structure of strengthening drive cylinder; Can make forr a short time and drive cylinder is compared with the same specification drive cylinder, quality is lighter, is convenient to fabrication and installation.
Fig. 3 is the structural representation of drive cylinder according to a second embodiment of the present invention.This second embodiment and first embodiment's difference is that drive cylinder also comprises and is used to detect the lockup state of Locking Device and/or the detection device of released state.Below only second embodiment and first embodiment's difference is described, no longer be repeated in this description for part identical between the two.
Among second embodiment, detection device comprises the first and second two detection units.Wherein, first detection unit is used to detect the lockup state of Locking Device; Second detection unit is used to detect the released state of Locking Device.The information that those skilled in the art can need to detect is only selected one of them detection unit.
Particularly, first detection unit comprises first Detecting element 27 and first sense cell 28.First Detecting element 27 is arranged at master cylinder tube 21 outer walls.First sense cell 28 is arranged on the block 23, and Locking Device when being in released state first sense cell 28 be in the induction zone of first Detecting element 27.Second detection unit comprises second Detecting element 29 and second sense cell 30.Second Detecting element 29 is arranged on the block 23.Second sense cell 30 is arranged on the main piston rod 26 and Locking Device when being in lockup state, and second sense cell 30 is in the induction zone of second Detecting element 29.
When first Detecting element 27 detects first sense cell 28, show that block 23 cooperates with projection 25 releasings, Locking Device is in released state, and main piston rod 26 can freely stretch out.When second Detecting element 29 detects second sense cell 30, show that block 23 cooperates with projection 25, Locking Device is in lockup state, and main piston rod 26, can't be stretched out by locking with respect to master cylinder tube 21.
When main piston rod 26 retracted to certain position, control system detected the signal of first Detecting element 27, and Locking Device is in released state, and main piston rod 26 can be withdrawn; After main piston rod 26 withdrawal, the lockup piston bar of control system control locking drive cylinder 22 stretches out, and makes block 23 rotate and cooperate with projection 25 around fixing pin 24.When control system can detect the signal of first Detecting element 29, showed that Locking Device is in lockup state this moment, and main piston rod 26 is by locking, and the suffered pulling force of drive cylinder this moment is pushed with projection 25 by block 23 and bears, and drive cylinder does not carry.
Second embodiment's drive cylinder opens and closes all has detection device to confirm, the prevention projection bumps against with block, and can avoid because of main piston rod not under the situation of locking carrying accidents caused.Cooperation to be to be separately positioned on projection inclined-plane and the block inclined-plane on projection and the block, also can avoid signal fault because of detection device to cause block not opened projection and block collision accident take place.
Need to prove; Detection device among second embodiment can be for discerning cooperating or remove any type of detection device that cooperates between block 23 and the projection 25; Detecting element and sense cell supporting for example can integrate, and are replaced by a kind of Detecting element.
Can find out that from above description the above embodiments of the present invention have realized following technique effect:
Through realizing the locking and the release of drive cylinder at the Locking Device of drive cylinder outer installment, thereby be convenient to the maintenance work of Locking Device, and make the working state of Locking Device detect easily and observe.In the lock position as in full reduced position to the main piston rod locking; When the oil cylinder locking; Can bear at least the portion of external pulling force and drive cylinder itself is not stressed or few stressed by Locking Device; Make drive cylinder can when locking, carry big load, help reducing the drive cylinder size, alleviate drive cylinder weight.Further, through block and the projection that cooperatively interacts in the drive cylinder outer installment, and promotion of locking drive cylinder or pulling block are set; Make itself and projection clamping or break away from locking and the release that realizes drive cylinder, when the Locking Device locking of drive cylinder, only rely on contacting of block and projection to bear external pull; And drive cylinder itself does not stress; Make drive cylinder can when full reduced, carry big load, help subtracting the drive cylinder size, alleviate drive cylinder weight.Further, lockup state and released state that detection device can detect Locking Device are set, thereby can avoid not locking and having an accident of main piston rod.Owing to be provided with block inclined-plane and projection inclined-plane, block and projection collision accident have effectively been avoided again.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. drive cylinder comprises: master cylinder tube (21) and main piston rod (26), it is characterized in that,
Said drive cylinder also comprises Locking Device; It is outside to be arranged at said drive cylinder; Said Locking Device comprises lockup state and released state; Be locked in the lock position at the said main piston rod of said lockup state (26) with respect to said master cylinder tube (21), at said released state, said main piston rod (26) can freely stretch in said master cylinder tube (21).
2. drive cylinder according to claim 1 is characterized in that, said lock position is all interior full reduced positions of the said master cylinder tube of retraction (21) of said main piston rod (26).
3. drive cylinder according to claim 1 and 2 is characterized in that, said Locking Device comprises:
First hooking part is arranged on the said master cylinder tube (21);
Second hooking part; Be arranged on the said main piston rod (26); The said second hooking part then said Locking Device that matches with said first hooking part is in said lockup state, and said second hooking part is removed with said first hooking part and cooperated then said Locking Device to be in said released state.
4. drive cylinder according to claim 3 is characterized in that said Locking Device also comprises the locking drive unit, wherein,
Said locking drive unit is arranged at that said master cylinder tube (21) is gone up and links to each other with said first hooking part, is used to drive said first hooking part and matches with said second hooking part and remove cooperation.
5. drive cylinder according to claim 4 is characterized in that,
Said first hooking part is articulated in said master cylinder tube (21) and goes up the end near said main piston rod (26);
Said second hooking part is fixed in said main piston rod (26) and goes up the end away from said master cylinder tube (21);
Said locking drive unit is connected with said first hooking part with said master cylinder tube (21) respectively.
6. drive cylinder according to claim 5 is characterized in that,
Said first hooking part comprises block (23), and said block (23) and said master cylinder tube (21) are hinged and comprise draw-in groove (233);
Said second hooking part comprises the projection (25) that is used for said draw-in groove (233) snap fit;
Said locking drive unit comprises locking drive cylinder (22), and said locking drive cylinder (22) comprises locking cylinder barrel and lockup piston bar, and in said locking cylinder barrel and the lockup piston bar one hinged with said master cylinder tube (21), and another and said block (23) are hinged.
7. drive cylinder according to claim 6 is characterized in that,
Two said projections (25) are symmetrically arranged in said main piston rod (26) both sides;
Said block (23) comprises respectively two draw-in grooves (233) that are equipped with two said projections (25).
8. drive cylinder according to claim 6 is characterized in that,
The side that said projection (25) is gone up away from said master cylinder tube (21) comprises first arc surface;
The draw-in groove (233) of said block (23) comprises and is used for second arc surface that cooperates with said first arc surface.
9. drive cylinder according to claim 6 is characterized in that,
Said block (23) comprises block inclined-plane (234), and said block inclined-plane (234) is arranged at the outer surface of said block near said main piston rod (26) one sides;
Said projection (25) comprises the projection inclined-plane (251) that cooperates slidably with said block inclined-plane (234), and said projection inclined-plane (251) is arranged on the surface of said projection (25) near said master cylinder tube (21) one sides.
10. drive cylinder according to claim 1 and 2 is characterized in that, said drive cylinder also comprises and is used to detect the lockup state of said Locking Device and/or the detection device of released state.
11. drive cylinder according to claim 10 is characterized in that, said detection device comprises:
First detection unit is used to detect the lockup state of said Locking Device;
Second detection unit is used to detect the released state of said Locking Device.
12. drive cylinder according to claim 6 is characterized in that, said drive cylinder also comprises and is used to detect the lockup state of said Locking Device and/or the detection device of released state.
13. drive cylinder according to claim 12 is characterized in that, said detection device comprises:
First Detecting element (27) is arranged at the outer wall of said master cylinder tube (21);
First sense cell (28) is arranged on the said block (23), and said Locking Device is when being in said released state, and said first sense cell (28) is in the induction zone of said first Detecting element (27).
14. drive cylinder according to claim 12 is characterized in that, said detection device comprises:
Second Detecting element (29) is arranged on the said block (23);
Second sense cell (30) is arranged on the said main piston rod (26), and said Locking Device is when being in said lock state, and said second sense cell (30) is in the induction zone of said second Detecting element (29).
15. a hoist comprises super lifting device (9) and is arranged at the compensating cylinder (2) on the said super lifting device (9), it is characterized in that, said compensating cylinder (2) is according to each described drive cylinder in the claim 1 to 14.
16. an engineering machinery comprises drive cylinder, it is characterized in that, said drive cylinder is according to each described drive cylinder in the claim 1 to 14.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210241263.2A CN102734262B (en) | 2012-07-12 | 2012-07-12 | Driving cylinder and crane and engineering machinery with same |
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| CN201210241263.2A CN102734262B (en) | 2012-07-12 | 2012-07-12 | Driving cylinder and crane and engineering machinery with same |
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| CN102734262A true CN102734262A (en) | 2012-10-17 |
| CN102734262B CN102734262B (en) | 2014-12-24 |
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| CN110683471A (en) * | 2019-11-27 | 2020-01-14 | 江苏新迈机械有限公司 | Anti-retraction suspension arm and crane |
| CN111379759A (en) * | 2018-12-28 | 2020-07-07 | 徐州徐工液压件有限公司 | Hydraulic oil cylinder assembly and crane |
| CN111874092A (en) * | 2019-04-22 | 2020-11-03 | 中国北方车辆研究所 | Steering return locking mechanism assembly operating system |
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| CN103434952A (en) * | 2013-09-11 | 2013-12-11 | 徐州重型机械有限公司 | Super-lift tensioning and locking mechanism and crane |
| CN103434952B (en) * | 2013-09-11 | 2015-10-28 | 徐州重型机械有限公司 | One has surpassed tensioner lockable mechanism and hoisting crane |
| CN107642517A (en) * | 2017-10-29 | 2018-01-30 | 刘福珍 | A kind of agricultural machinery is obstructed control device with cylinder stroke |
| CN107690905A (en) * | 2017-10-29 | 2018-02-16 | 刘福珍 | Agricultural uses transplanter seedling clipping machine structure cylinder location structure |
| CN107830010A (en) * | 2017-10-29 | 2018-03-23 | 刘福珍 | A kind of cylinder stroke is obstructed positioner |
| CN107690905B (en) * | 2017-10-29 | 2019-09-06 | 潍坊学院 | Cylinder positioning structure of seedling clamping mechanism of agricultural transplanter |
| CN111379759A (en) * | 2018-12-28 | 2020-07-07 | 徐州徐工液压件有限公司 | Hydraulic oil cylinder assembly and crane |
| CN111874092A (en) * | 2019-04-22 | 2020-11-03 | 中国北方车辆研究所 | Steering return locking mechanism assembly operating system |
| CN111891213A (en) * | 2019-04-22 | 2020-11-06 | 中国北方车辆研究所 | Method and system for controlling return locking mechanism of rear axle steering |
| CN110683471A (en) * | 2019-11-27 | 2020-01-14 | 江苏新迈机械有限公司 | Anti-retraction suspension arm and crane |
| EP4215034A1 (en) * | 2021-11-05 | 2023-07-26 | CNH Industrial Belgium NV | Piston lock system for agricultural equipment |
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