CN202320248U - Engineering machinery and landing leg locking device thereof - Google Patents
Engineering machinery and landing leg locking device thereof Download PDFInfo
- Publication number
- CN202320248U CN202320248U CN2011205006487U CN201120500648U CN202320248U CN 202320248 U CN202320248 U CN 202320248U CN 2011205006487 U CN2011205006487 U CN 2011205006487U CN 201120500648 U CN201120500648 U CN 201120500648U CN 202320248 U CN202320248 U CN 202320248U
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- Prior art keywords
- supporting leg
- oil cylinder
- piston rod
- cylinder
- locked cylinder
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Abstract
The utility model discloses engineering machinery and a landing leg locking device thereof. The disclosed landing leg locking device comprises a locking oil cylinder. A rod cavity of the locking oil cylinder is communicated with a rod-free cavity oil path of a landing leg retreating and spreading oil cylinder, and a piston rod of the locking oil cylinder is provided with an inclined face. When landing legs are retreated, the inclined face abuts against the landing legs in contact mode to enable the landing legs to be retreated for unlocking. After the landing legs are retreated, the piston rod spreads out for locking. The landing leg locking device enables hydraulic oil in a retreating and spreading oil cylinder to drive the oil cylinder to be automatically unlocked when the landing legs spread out and enables the locking oil cylinder to be automatically unlocked under abutting of the landing legs, namely the landing leg locking device can be automatically unlocked or locked according to retreating and spreading requirements of the landing legs. The landing leg locking device is simple and convenient to operate, capable of reducing labor quantity of operators and improving working efficiency. Further, the locking oil cylinder is simple in structure and production process and convenient to install. In addition, the locking oil cylinder is simple and easy to maintain due to self lubrication effects.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of construction machinery and equipment and outrigger locking device thereof.
Background technology
Concrete pump truck has the supporting leg that supports car load, and supporting leg has the different working requirement under different working conditions.
During normal operation, supporting leg is in deployed condition usually, and the oil cylinder of leg ends stretches out and is supported in ground, the stationarity during with the work of maintenance car load; And in the process of moving, then must supporting leg be regained.Yet, owing to reasons such as vibrations, thus in the driving process supporting leg be easy to occur accident arrange or stretch out cause dangerous accidents caused.Therefore, need setting can in driving process, lock supporting leg to prevent the Locking Device of supporting leg generation play.
At present, the Locking Device of employing is mainly two kinds of structures of subordinate: first kind by bearing pin, key seat with have fixedly the parts such as thin steel rope of socket and form; Second kind by the pipe that has chute, bearing pin and be connected in compositions such as handle and spring on the bearing pin.Above-mentioned two kinds of Locking Devices are all fixed through bearing pin, structurally can realize the safe locking of supporting leg.Yet above-mentioned Locking Device all needs artificial plug bearing pin to realize release or locking, i.e. during supporting leg withdrawal; Insert bearing pin; Pump truck construction and when needing supporting leg to stretch out again can launch supporting leg after extracting the bearing pin release by manual work, operates more loaded down with trivial details; Take the engineering time, influenced operating efficiency and progress then; And, the complex structure of above-mentioned Locking Device, require to cooperate accurate, correspondingly, manufacturing process with install all complicated; In addition, along with the pump truck increase of tenure of use, parts such as the bearing pin of Locking Device can be stuck owing to reason such as get rusty, thereby cause manually operated difficulty.
In view of this, how a kind of Locking Device being provided, making the locking and unlocking program of supporting leg comparatively easy, is those skilled in the art's technical issues that need to address.
The utility model content
The purpose of the utility model is for providing outrigger locking device, and this outrigger locking device comprises locked cylinder, and this locked cylinder automatically locks and the release supporting leg according to the flexible demand of supporting leg, makes the locking and unlocking all comparatively easy of supporting leg.Another purpose of the utility model is that a kind of construction machinery and equipment with above-mentioned outrigger locking device is provided.
For reaching above-mentioned first purpose, the utility model provides a kind of outrigger locking device, is used for the locking supporting leg; Said supporting leg is realized taking down the exhibits through the hydraulic oil cylinder driving of taking down the exhibits; Said outrigger locking device comprises locked cylinder, and the rod chamber of locked cylinder is communicated with the rodless cavity oil circuit of the oil cylinder of taking down the exhibits, when supporting leg launches; Hydraulic oil gets into the locked cylinder rod chamber, locked cylinder inner piston rod withdrawal release; Be provided with reset components in the rodless cavity of locked cylinder; And said piston rod has the inclined-plane; When said supporting leg is retracted to said locked cylinder position, said inclined-plane towards said supporting leg and with its conflict, said piston rod withdrawal release; After said supporting leg was regained, said reset components resetted said piston rod to stretch out with the said supporting leg of locking.
Preferably, said reset components is a spring.
This outrigger locking device comprises locked cylinder; The rod chamber of locked cylinder is communicated with the rodless cavity oil circuit of the oil cylinder of taking down the exhibits; Take down the exhibits when then supporting leg need the launch rodless cavity oil-feed of oil cylinder; And hydraulic oil gets into the rod chamber of locked cylinder in this oil circuit, and the withdrawal of driven locking oil cylinder piston bar realizes automatic unlocking.Be provided with reset components in the rodless cavity of locked cylinder, and said piston rod has the inclined-plane, when then supporting leg is regained; When said supporting leg is retracted to said locked cylinder position; Said inclined-plane towards said supporting leg and with its conflict, the piston rod inclined-plane can receive downward thrust, piston rod is descending; Then supporting leg can be crossed piston rod, the locked cylinder release; After supporting leg was crossed piston rod, piston rod stretched out under the reset response of reset components again, and the restriction supporting leg launches, thereby played the effect of locking.Therefore; This outrigger locking device locked cylinder is through the mode of machinery and hydraulic pressure combination, automatically locks or release according to the withdrawal and the expansion demand of supporting leg, and is more efficient and intelligent; Can reduce the labor content of operating personal; And the mistake that manual operation possibly occur with forget the influence that is brought and can be eliminated, further reduce the setup time of pump truck operation, increase work efficiency; Through the mode of artificial insert-pull pin lock and release, this operating mode is comparatively easy, and locked cylinder structure and production technology are simple in the prior art, is convenient to install; In addition, bearing pin often needs lubricatedly or change spare part and eliminate corrosion through butter in the prior art, because the self-lubricating effect of locked cylinder in this programme, the care and maintenance of locked cylinder is also comparatively simple and easy.
For reaching another purpose of utility model, the utility model provides a kind of construction machinery and equipment, and construction machinery and equipment is provided with supporting leg, also comprises above-mentioned each described outrigger locking device.
Preferably; The rod chamber of the said oil cylinder of taking down the exhibits, rodless cavity are connected with second hydraulic fluid port with first hydraulic fluid port of supporting leg multiway valve respectively; At the supporting leg multiway valve and take down the exhibits and be provided with hydraulic lock between the oil cylinder, the rod chamber of said locked cylinder is communicated with the oil circuit between second hydraulic fluid port to the said hydraulic lock of said supporting leg multiway valve.
Preferably, said supporting leg is provided with block; Said supporting leg is regained when moving to said locked cylinder position, conflicts in first inclined-plane of said block and said piston rod.
Preferably, said block has second inclined-plane, and said supporting leg is regained when moving to said locked cylinder position, and second inclined-plane of said block matches with first inclined-plane of piston rod.
Preferably, said locked cylinder is installed on the side of construction machinery and equipment car body, and said supporting leg is the oscillating-type supporting leg that is retracted to vehicle body side.
Preferably, said supporting leg is the concertina type supporting leg, and said locked cylinder is installed in the basic arm of supporting leg.
Because above-mentioned outrigger locking device has above-mentioned technique effect, the construction machinery and equipment with this outrigger locking device also has identical technique effect.
Description of drawings
The structural representation that Fig. 1 provides the supporting leg blocking device to be used for locking construction machinery and equipment supporting leg for the utility model, this figure only illustrates the part car body of a supporting leg and construction machinery and equipment;
Fig. 2 is the structural representation of locked cylinder piston rod locking supporting leg among Fig. 1;
Fig. 3 is the left view of Fig. 2;
Fig. 4 is the structural representation of locked cylinder release among Fig. 1;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is the hydraulic efficiency pressure system scheme drawing of take down the exhibits among Fig. 1 oil cylinder and locked cylinder.
The specific embodiment
The core of the utility model is for providing a kind of construction machinery and equipment and outrigger locking device thereof, and this outrigger locking device comprises locked cylinder, and this locked cylinder automatically locks and the release supporting leg according to the flexible demand of supporting leg, makes the locking and unlocking all comparatively easy of supporting leg.
In order to make those skilled in the art understand the technical scheme of the utility model better, the utility model is done further to specify below in conjunction with accompanying drawing and specific embodiment.For ease of understanding, hereinafter combines construction machinery and equipment and outrigger locking device to describe, and beneficial effect no longer repeats to discuss.
Please refer to Fig. 1, the structural representation that Fig. 1 provides the supporting leg blocking device to be used for locking construction machinery and equipment supporting leg for the utility model, this figure only illustrates the part car body of a supporting leg and construction machinery and equipment.
Construction machinery and equipment in this specific embodiment comprises car body 1, and car body 1 is equipped with supporting leg 2.With the concrete pump truck is example, and car body 1 chassis head is provided with center of gyration usually, and in the fixedly capstan head place of center of gyration supporting leg 2 is set, to support the car load operation.One end of oscillating-type supporting leg 2 as shown in Figure 1 is articulated in car body 1, can rotate with respect to car body 1, and promptly supporting leg 2 can launch, and can enlarge the stabilized zone of car load after the supporting leg 2 of car body 1 axis both sides launches; When concrete pump truck went, supporting leg 2 backward rotation were retracted to car body 1 place.The withdrawal of supporting leg 2 and expansion can realize that an end of the oil cylinder 21 of taking down the exhibits is articulated in car body 1 by the oil cylinder 21 of taking down the exhibits, and the other end and supporting leg 2 are hinged.The oil cylinder 21 rodless cavity oil-feeds of taking down the exhibits, piston rod stretches out, and promotes supporting leg 2, and supporting leg 2 launches; The oil cylinder 21 rod chamber oil-feeds of taking down the exhibits, the piston rod withdrawal, pulling supporting leg 2, supporting leg 2 is regained.
The construction machinery and equipment outrigger locking device comprises locked cylinder 11 in the utility model; Piston rod 111 is set in the locked cylinder 11; Locked cylinder 11 carries out release to be implemented in when supporting leg 2 launches, and after supporting leg 2 is regained, carries out locking between supporting leg 2 retrieving positions and expanded position.Retrieving position described here refers to that supporting leg 2 is retracted to end position, and is as shown in Figure 1, is positioned at the side of car body 1 during supporting leg 2 withdrawals; Described expanded position refers to that supporting leg 2 is expanded to end position (among Fig. 1, supporting leg 2 is an oscillating oil cylinder), and promptly supporting leg 2 is rocked to the position of maximum subtended angle, and whole supporting leg 2 is the part of taking down the exhibits of supporting leg 2.When supporting leg was telescopic outrigger, expanded position referred to that supporting leg stretchs out fully, and wherein the inner arm of supporting leg is the part of taking down the exhibits, and retrieving position refers to that inner arm is retracted in the basic arm of supporting leg, and locked cylinder 11 can be installed on the basic arm place.Following content is mainly described during for oscillating support leg with the supporting leg, and the telescopic outrigger principle is identical, and or else this paper do not give unnecessary details.
When supporting leg 2 was oscillating support leg, supporting leg 2 generally was retracted to the both sides of car body 1, and locked cylinder 11 also correspondingly is located at the side of car body 1.With respect to the retrieving position of supporting leg 2, locked cylinder 11 is farther with the distance of car body 1 axis.In addition; The principle of locked cylinder 11 the locking and unlockings is following: as shown in Figure 1, when the piston rod 111 of locked cylinder 11 stretched out, piston rod 111 was higher than the nadir of supporting leg 2 correspondence positions; And when piston rod 111 was regained, piston rod 111 was lower than the nadir of supporting leg 2 correspondence positions.The corresponding relation of correspondence position and piston rod 111 is here: when piston rod 111 stretched out, piston rod 111 was positioned on the swing path of correspondence position.Then supporting leg 2 is when the unexpected expansion of retrieving position, and piston rod 111 stretches out, and piston rod 111 can be conflicted with supporting leg 2, and restriction supporting leg 2 launches; When supporting leg 2 needs expansion or withdrawal, make piston rod 111 withdrawals, get into released state, piston rod 111 does not interfere with supporting leg 2, and supporting leg 2 can launch or regain smoothly, after the withdrawal, piston rod 111 is stretched out again, locking supporting leg 2.
Please continue referring to figs. 2 to Fig. 4, Fig. 2 is the structural representation of locked cylinder piston rod locking supporting leg among Fig. 1; Fig. 3 is the left view of Fig. 2; Fig. 4 is the structural representation of locked cylinder release among Fig. 1; Fig. 5 is the left view of Fig. 4.
The rod chamber of locked cylinder 11 is communicated with the rodless cavity oil circuit of the oil cylinder 21 of taking down the exhibits, and is provided with reset components in the rodless cavity of locked cylinder 11, and the end face of the piston rod 111 of locked cylinder 11 is processed with the inclined-plane P2 towards supporting leg 2 expanded positions.The reset components of the rodless cavity setting of locked cylinder shown in Fig. 2 11 is a spring 112; Under the reset response of spring 112, piston rod 111 is in the state of stretching out, when the rod chamber oil-feed; Spring 112 is compressed under the pressure effect of rod chamber hydraulic oil, piston rod 111 withdrawals; Reset components also can be other elastomeric elements.
When supporting leg 2 was regained, when the inclined-plane P2 of block 22 abuts against plunger bars 111, the inclined-plane P2 of piston rod 111 can receive downward thrust; And then overcome the elastic force of rodless cavity spring 112; Piston rod 111 is descending, can limit stop 22 not rotate towards retrieving position, and promptly block 22 can be crossed piston rod 111; Block 22 then acts on the forces of piston rod 111 through behind the piston rod 111, and piston rod 111 stretches out under the reset response of spring 112 again; As shown in Figure 3; When supporting leg 2 has expansion trend (direction of Fig. 3 right-of-center in political views's arrow, left arrow representes to regain direction), because piston rod 111 meeting conflict blocks 22; Then supporting leg 2 can't launch, thereby plays the effect of locking.
After then processing inclined-plane P2, when supporting leg 2 is regained, need not the stretching out and withdraw of retracted state and control plunger bar 111 of artificial judgment supporting leg 2, in the withdrawal process of supporting leg 2, can realize automatic locking, operate more easy.This automatic locking process comprises that piston rod 111 is in block 22 effect withdrawal release and under spring 112 acts on, stretch out two actions of locking automatically automatically down.
The scheme of more optimizing does, the lower surface of block 22 is processed the block 22 inclined-plane P1 towards supporting leg 2 retrieving positions, and the angle of block 22 inclined-plane P1 equates with the angle of piston rod inclined-plane P2; Piston rod 111 stretches out and supporting leg 2 when regaining; Piston rod inclined-plane P2 is relative with block 22 inclined-plane P1, and then block 22 inclined-plane P1 can slip over piston rod inclined-plane P2 gradually along with the withdrawal of supporting leg 2; Can worn piston bar 111 when realizing down push piston bar 111, prolong the service life of locked cylinder 11.Certainly; Also block 22 can be set, supporting leg 2 piston rod 111 of self also can conflicting plays the effect of automatic unlocking; Block is set special block 22 and is convenient to actual use; Need not existing leg structure is made other changes, block 22 can be directly welded on the supporting leg 2, and processing and installation are all comparatively easy.
When supporting leg 2 needs to launch, make the rod chamber oil-feed of locked cylinder 11,111 releases of withdrawal piston rod get final product, can be referring to Fig. 4 and Fig. 5.When supporting leg 2 launched, locked cylinder 11 automatic unlocking processes were following:
Please continue with reference to figure 1 and combine Fig. 6 to understand, Fig. 6 is the hydraulic efficiency pressure system scheme drawing of take down the exhibits among Fig. 1 oil cylinder and locked cylinder.The oil cylinder 21 of taking down the exhibits shown in Figure 1 is connected with supporting leg multiway valve 3, and supporting leg multiway valve 3 has the first hydraulic fluid port A and the second hydraulic fluid port B that is communicated with take down the exhibits oil cylinder 21 rod chambers and rodless cavity respectively; At a control position of supporting leg multiway valve 3, hydraulic oil gets into the rodless cavity of the oil cylinder 21 of taking down the exhibits from the second hydraulic fluid port B, the rod chamber oil return, and supporting leg 2 launches; Switching-over is to another control position, and hydraulic oil gets into oil cylinder 21 rod chambers of taking down the exhibits from the first hydraulic fluid port A, the rodless cavity oil return, and supporting leg 2 is regained.
This programme is communicated with the rodless cavity oil circuit of the oil cylinder 21 of taking down the exhibits with the rod chamber of locked cylinder 11, among Fig. 6 locked cylinder 11 rod chambers is communicated with the oil circuit of taking down the exhibits between oil cylinder 21 rodless cavities and the supporting leg multiway valve 3.When supporting leg 2 needs to launch, control supporting leg multiway valve 3, make the second hydraulic fluid port B mouth oil inlet of the supporting leg multiway valve 3 that is communicated with the rodless cavity of the oil cylinder 21 of taking down the exhibits, hydraulic oil has the trend of the rodless cavity or locked cylinder 11 rod chambers that flow into the oil cylinder 21 of taking down the exhibits.Because supporting leg 2 is locked oil cylinder 11 lockings; The operating pressure of oil cylinder 21 of then taking down the exhibits is higher than the operating pressure of locked cylinder 11, so locked cylinder 11 at first moves, promptly hydraulic oil at first gets into the rod chamber of locked cylinder 11 after the second hydraulic fluid port B flows out; After piston rod 111 withdrawals of driven locking oil cylinder 11; Realize the release of supporting leg 2, hydraulic oil flows to the rodless cavity of the oil cylinder 21 of taking down the exhibits again, and supporting leg 2 can launch.
This scheme is communicated with the oil circuit of locked cylinder 11 rod chambers in the path of take down the exhibits oil cylinder 21 rodless cavities and supporting leg multiway valve 3; When then supporting leg 2 needs to launch; Take down the exhibits hydraulic oil in advance driven locking oil cylinder 11 piston rods 111 withdrawals automatically of oil cylinder 21 of driving realize automatic unlocking; When supporting leg 2 needed to regain, block 22 pushed away piston rod for 111 times automatically, be retracted to retrieving position after, piston rod 111 stretches out again under the mechanical return effect automatically, and supporting leg 2 is locked in retrieving position.
Therefore; Locked cylinder 11 among this embodiment is through the mode of machinery with the hydraulic pressure combination, automatically locks or release according to the withdrawal and the expansion demand of supporting leg 2, and is more efficient and intelligent; Can reduce the labor content of operating personal; And the mistake that manual operation possibly occur with forget the influence that is brought and can be eliminated, further reduce the setup time of pump truck operation, increase work efficiency; Through the mode of artificial insert-pull pin lock and release, this operating mode is comparatively easy, and locked cylinder structure and production technology are simple in the prior art, is convenient to install; In addition, bearing pin often needs lubricatedly or change spare part and eliminate corrosion through butter in the prior art, because the self-lubricating effect of locked cylinder in this programme, the care and maintenance of locked cylinder is also comparatively simple and easy.
In the hydraulic efficiency pressure system that drives supporting leg 2; Take down the exhibits and between oil cylinder 21 and the supporting leg multiway valve 3 deadweight safety valve can also be set; Such as the hydraulic lock shown in Fig. 64; When supporting leg multiway valve 3 had and is in meta, two hydraulic control one-way valves of hydraulic lock 4 were realized interlocking, guarantee to take down the exhibits the in stable condition of oil cylinder 21 rod chambers and rodless cavity.The flow path of hydraulic oil is: A mouth, a mouth, c mouth, oil cylinder 21 rod chambers of taking down the exhibits; Then promote piston rod, hydraulic oil is from take down the exhibits oil cylinder 21 rodless cavities, d mouth (a part of hydraulic oil that is flowed out by a mouth is in order to open the right one-way valve), b mouth, B mouth, during 3 switching-overs of supporting leg multiway valve; Flow path is just the opposite; When hydraulic lock 4 was in meta, two check valves were locked, and the hydraulic oil of the oil cylinder 21 of taking down the exhibits is in stable not flow regime.Owing to reasons such as vibrations; The hydraulic oil state potentially unstable in oil cylinder 21 rod chambers and the rodless cavity of taking down the exhibits; Hydraulic oil possibly flow in the locked cylinder 11 and unexpected release by oil cylinder 21 rodless cavities of taking down the exhibits; Behind the rod chamber connection supporting leg multiway valve 3 and the oil circuit between the safety valve with locked cylinder 11, hydraulic lock 4 can prevent locked cylinder 11 unexpected releases, makes the work of locked cylinder 11 more reliable.
To the foregoing description, locked cylinder 11 is installed on 1 last time of car body, can the cylinder barrel of locked cylinder 11 be installed on the car body 1 through mounting flange 13 and screw 12.As shown in Figure 2, cylinder barrel and mounting flange 13 are fixing, and screw 12 is fixed in mounting flange 13 on the car body 1, thereby realize the fixing of locked cylinder 11 and car body 1.
More than a kind of construction machinery and equipment and outrigger locking device thereof that the utility model provided have been carried out detailed introduction.Used concrete example among this paper the principle and the embodiment of the utility model are set forth, the explanation of above embodiment just is used to help to understand the method and the core concept thereof of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (8)
1. an outrigger locking device is used for the locking supporting leg, and said supporting leg is realized taking down the exhibits through the hydraulic oil cylinder driving of taking down the exhibits; It is characterized in that; Said outrigger locking device comprises locked cylinder, and the rod chamber of locked cylinder is communicated with the rodless cavity oil circuit of the oil cylinder of taking down the exhibits, when said supporting leg launches; Hydraulic oil gets into the locked cylinder rod chamber, locked cylinder inner piston rod withdrawal release;
Be provided with reset components in the rodless cavity of locked cylinder; And said piston rod has the inclined-plane; When said supporting leg is retracted to said locked cylinder position, said inclined-plane towards said supporting leg and with its conflict, said piston rod withdrawal release; After said supporting leg was regained, said reset components resetted said piston rod to stretch out with the said supporting leg of locking.
2. outrigger locking device as claimed in claim 1 is characterized in that, said reset components is a spring.
3. construction machinery and equipment, construction machinery and equipment is provided with supporting leg, it is characterized in that, also comprises claim 1 or 2 described outrigger locking devices.
4. construction machinery and equipment as claimed in claim 3; It is characterized in that; The rod chamber of the said oil cylinder of taking down the exhibits, rodless cavity are connected with second hydraulic fluid port with first hydraulic fluid port of supporting leg multiway valve respectively; At the supporting leg multiway valve and take down the exhibits and be provided with hydraulic lock between the oil cylinder, the rod chamber of said locked cylinder is communicated with the oil circuit between second hydraulic fluid port to the said hydraulic lock of said supporting leg multiway valve.
5. like claim 3 or 4 described construction machinery and equipments, it is characterized in that said supporting leg is provided with block; Said supporting leg is regained when moving to said locked cylinder position, conflicts in first inclined-plane of said block and said piston rod.
6. construction machinery and equipment as claimed in claim 5 is characterized in that said block has second inclined-plane, and said supporting leg is regained when moving to said locked cylinder position, and second inclined-plane of said block cooperates with first inclined-plane of piston rod.
7. construction machinery and equipment as claimed in claim 6 is characterized in that said locked cylinder is installed on the side of construction machinery and equipment car body, and said supporting leg is the oscillating-type supporting leg that is retracted to vehicle body side.
8. construction machinery and equipment as claimed in claim 6 is characterized in that, said supporting leg is the concertina type supporting leg, and said locked cylinder is installed in the basic arm of supporting leg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205006487U CN202320248U (en) | 2011-12-05 | 2011-12-05 | Engineering machinery and landing leg locking device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205006487U CN202320248U (en) | 2011-12-05 | 2011-12-05 | Engineering machinery and landing leg locking device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202320248U true CN202320248U (en) | 2012-07-11 |
Family
ID=46432239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205006487U Expired - Lifetime CN202320248U (en) | 2011-12-05 | 2011-12-05 | Engineering machinery and landing leg locking device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202320248U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389851A (en) * | 2014-11-20 | 2015-03-04 | 徐州徐工施维英机械有限公司 | Hydraulic limiting device and concrete pump truck |
| CN105128830A (en) * | 2015-09-14 | 2015-12-09 | 厦门厦工机械股份有限公司 | Landing leg locking device and engineering machinery with same |
| CN114908762A (en) * | 2022-03-18 | 2022-08-16 | 东通岩土科技股份有限公司 | Foundation pit inclined pile supporting structure capable of pre-stressing |
-
2011
- 2011-12-05 CN CN2011205006487U patent/CN202320248U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104389851A (en) * | 2014-11-20 | 2015-03-04 | 徐州徐工施维英机械有限公司 | Hydraulic limiting device and concrete pump truck |
| CN104389851B (en) * | 2014-11-20 | 2017-04-26 | 徐州徐工施维英机械有限公司 | Hydraulic limiting device and concrete pump truck |
| CN105128830A (en) * | 2015-09-14 | 2015-12-09 | 厦门厦工机械股份有限公司 | Landing leg locking device and engineering machinery with same |
| CN114908762A (en) * | 2022-03-18 | 2022-08-16 | 东通岩土科技股份有限公司 | Foundation pit inclined pile supporting structure capable of pre-stressing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SANY AUTOMOBILE MANUFACTURING CO., LTD. Free format text: FORMER OWNER: SANYI HEAVY INDUSTRY CO LTD Effective date: 20130502 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130502 Address after: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee after: SANY Automobile Manufacturing Co., Ltd. Address before: 410100 Changsha economic and Technological Development Zone, Hunan City, the 31 industrial city Patentee before: Sanyi Heavy Industry Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120711 |
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| CX01 | Expiry of patent term |