CN201280820Y - Supporting leg and engineering machinery with the supporting leg - Google Patents
Supporting leg and engineering machinery with the supporting leg Download PDFInfo
- Publication number
- CN201280820Y CN201280820Y CNU2008201369511U CN200820136951U CN201280820Y CN 201280820 Y CN201280820 Y CN 201280820Y CN U2008201369511 U CNU2008201369511 U CN U2008201369511U CN 200820136951 U CN200820136951 U CN 200820136951U CN 201280820 Y CN201280820 Y CN 201280820Y
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- CN
- China
- Prior art keywords
- outrigger arm
- supporting leg
- outrigger
- guide rail
- adjacent
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Abstract
The utility model discloses an outrigger used for engineering machinery which comprises at least two stages of outrigger arms nested with each other, and the adjacent two stages of outrigger arms can have telescopic movement oppositely, and the outrigger is characterized in that a slide block and a guide rail are respectively arranged on the adjacent two stages of outrigger arms, the slide block is matched with the guide rail, and the adjacent two stages of outrigger arms can have telescopic movement along the slide block and the guide rail. As the adjacent two stages of outrigger arms can have telescopic movement along the slide block and the guide rail, and force is applied on the outrigger, the force applied on the adjacent two stages of outrigger arms are dispersed on the lateral plates of the adjacent two stages of outrigger arms; so the outrigger arm has evener force application, and the local contact stress of the top plates and bottom plates of the adjacent two stages of outrigger arms is reduced; thereby, the fatigue damage to the welding seam of the adjacent outrigger arms is reduced.
Description
Technical field
The utility model relates to engineering machinery field, especially relates to a kind of supporting leg of engineering machinery; The utility model also relates to a kind of engineering machinery with described supporting leg simultaneously.
Background technology
Support when many engineering machinery need adopt bracing or strutting arrangement realization work, excessive and cause toppling of engineering machinery with avoid operation time load.Bracing or strutting arrangement generally comprises four supporting legs, and each supporting leg all has packs up and launch two states.When this project machinery needs are mobile, need pack up supporting leg, so that move; When this project machinery is in the construction state, then need to launch supporting leg, realize supporting.
For example, when concrete mixer was worked, four supporting legs of concrete mixer launched support ground, bore the moment of flexure that the gravity of concrete mixer deadweight and boom system thereof produces by the supporting leg that launches, and prevented from that concrete mixer self from producing to topple.
Along with the length of concrete pump truck arm system increases gradually, the moment of flexure that the dress part produces on the concrete mixer is increasing, and the supporting leg stressing conditions of concrete mixer is also more abominable.At present, the concrete mixer supporting leg adopts telescopic structure (single-stage or multistage) mostly, and outrigger arms at different levels are flexible to appointed positions by a single-stage or multi-stage expansion oil cylinder.
With reference to figure 1 and Fig. 2, Fig. 1 is the structural representation of supporting leg of the prior art; Fig. 2 is the viewgraph of cross-section of supporting leg among Fig. 1.
As depicted in figs. 1 and 2, the figure shows a kind of single-stage telescopic leg, this supporting leg comprises first order outrigger arm 1a, second level outrigger arm 2a, supporting leg 3a and telescopic oil cylinder 4a, first order outrigger arm 1a is connected with the fixedly capstan head of concrete mixer by gyroaxis, second level outrigger arm 2a places first order outrigger arm 1a inside, an end and the first order outrigger arm 1a of telescopic oil cylinder 4a are hinged, the other end of telescopic oil cylinder 4a and second level outrigger arm 2a are hinged, and supporting leg 3a hangs down and is connected as for second level outrigger arm 2a and with the front end of second level outrigger arm 2a.Realize second level outrigger arm 2a with respect to first order outrigger arm 1a telescopic moving by telescopic oil cylinder 4a, supporting leg 3a supports on the ground, and then bears the gravity of concrete mixer and the moment of flexure that boom system produces, and prevents that the concrete mixer generation from toppling.
As can be seen, the supporting leg of above-mentioned concrete mixer is a cantilever beam structures, after supporting leg is stressed, the top board 21a contact position of the top board 11a of first order outrigger arm 1a and second level outrigger arm 2a produces huge compressive stress, and the base plate 23a contact position of the base plate 13a of first order outrigger arm 1a and second level outrigger arm 2a produces huge tensile stress, producing stress in the contact position of first order outrigger arm 1a and second level outrigger arm 2a concentrates, under the prolonged and repeated effect of stress loading, very easily cause the top board 11a of first order outrigger arm 1a or the generation fatigue cracking of the weld seam between base plate 13a and the side plate 12a, the top board 21a of same second level outrigger arm 2a and the weld seam of base plate 23a and side plate 22a easily produce fatigue cracking, thereby cause supporting leg to lose efficacy and generation concrete mixer capsizing case.
And, because the top board compression chord of first order outrigger arm 1a and second level outrigger arm 2a, and the base plate of first order outrigger arm 1a and second level outrigger arm 2a is subjected to tensile stress, thereby the zone line of the side plate 12a of first order outrigger arm 1a forms the stress neutral line, the zone line of the side plate 22a of same second level outrigger arm 2a forms the stress neutral line, stress increases gradually to the direction of both sides top board and base plate, and then cause stress distribution inhomogeneous, first order outrigger arm 1a and second level outrigger arm 2a discontinuity equalization.
In addition,, increase the mother metal thickness of reinforcing rib or increase supporting leg, thereby cause supporting leg and concrete mixer weight to increase, and increased cost of production at the supporting leg contact site in order to increase the intensity of supporting leg.
The utility model content
At the problems referred to above, the technical problem that the utility model solves is to provide a kind of supporting leg, can effectively reduce the active force that the supporting leg weld seam bears, and avoids the supporting leg weld seam to produce fatigue cracking, reduces the weight of supporting leg, reduces cost.
The supporting leg that is used for engineering machinery that the utility model provides, comprise two-stage mutual sheathing outrigger arm together at least, the telescopic moving relatively of adjacent two-stage outrigger arm, be respectively arranged with slide block and guide rail on the described adjacent two-stage outrigger arm, described slide block cooperates with described guide rail, and described adjacent two-stage outrigger arm can be along described slide block and guide rail telescopic moving.
Preferably, described guide rail is the groove that is opened on the side plate of an outrigger arm in the described adjacent two-stage outrigger arm, and described groove is arranged along the length direction of this outrigger arm.
Preferably, described groove is positioned at the centre position of the side plate vertical direction of described outrigger arm.
Preferably, described guide rail is along two parallel long rails arranging on the side plate of an outrigger arm in the described adjacent two-stage outrigger arm, and described two parallel long rails form guide-track groove, and described slide block cooperates with described guide-track groove.
Preferably, described guide rail is installed in the side plate inboard of an outrigger arm in the described adjacent two-stage outrigger arm, and described slide block is installed in the side plate outside of another outrigger arm.
Preferably, described guide rail is a long rail of arranging along the side plate inside length direction of an outrigger arm in the described adjacent two-stage outrigger arm, and described slide block is overlapped on this long rail.
Preferably, described guide rail is inboard at least two strengthening rib strips that are provided with of side plate of an outrigger arm in described adjacent two-stage outrigger arm; Described slide block is at least two strengthening rib strips of the side plate arranged outside of another outrigger arm in described adjacent two-stage outrigger arm, and the corresponding contact of the strengthening rib strip of described adjacent two-stage outrigger arm fastens.
The novel engineering machinery that provides of this use, this project machinery are equipped with the utility model content and the described supporting leg of preferred embodiment.
Compared with prior art, the side plate of the adjacent two-stage outrigger arm in the supporting leg that the utility model provides is provided with slide block and guide rail, and described slide block cooperates with described guide rail, and described adjacent two-stage outrigger arm can be along described slide block and guide rail telescopic moving; When this supporting leg is stressed, the stressed interaction of described adjacent two-stage outrigger arm by described slide block and guide rail, active force is dispersed on the side plate of described adjacent two-stage outrigger arm, and then make outrigger arm stressed more even, reduce the top board of described adjacent two-stage outrigger arm and the local contact stress of base plate, thereby reduced fatigue failure the weld seam of described adjacent legs arm.
And owing to reduce the local contact position maximum stress of described outrigger arm, the integrated stress of adjacent two-stage outrigger arm distributes more even, thereby can suitably reduce the steel of base metal plate thickness of outrigger arm, can further reduce supporting leg and complete vehicle weight, and reduce cost.
Description of drawings
Fig. 1 is the structural representation of supporting leg of the prior art;
Fig. 2 is the viewgraph of cross-section of the supporting leg among Fig. 1;
The schematic diagram of first kind of specific embodiment under deployed condition of the supporting leg that Fig. 3 provides for the utility model;
Fig. 4 is the viewgraph of cross-section of the supporting leg among Fig. 3;
Fig. 5 is the schematic diagram of supporting leg under contraction state among Fig. 3;
The viewgraph of cross-section of second kind of specific embodiment of the supporting leg that Fig. 6 provides for the utility model;
The structural representation of the third specific embodiment of the supporting leg that Fig. 7 provides for the utility model;
Fig. 8 is the viewgraph of cross-section of supporting leg among Fig. 7;
The viewgraph of cross-section of the 4th kind of specific embodiment of the supporting leg that Fig. 9 provides for the utility model.
Reference numeral is as follows:
1 first order outrigger arm, 11 first order outrigger arm top boards, 12 first order outrigger arm side plates, 13 first order outrigger arm base plates
2 second level outrigger arms, 21 second level outrigger arm top boards, 22 second level outrigger arm side plates, 23 second level outrigger arm base plates
3 supporting legs, 4 telescopic oil cylinders, 5 guide rails, 6 slide blocks
7 first ribs, 8 second ribs 9 the 3rd rib 10 the 4th rib
The specific embodiment
In order to make those skilled in the art better understand the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
With reference to figure 3 and Fig. 4, the schematic diagram of first kind of specific embodiment under deployed condition of the supporting leg that Fig. 3 provides for the utility model; Fig. 4 is the viewgraph of cross-section of the supporting leg among Fig. 3.
As shown in Figure 3, the supporting leg that provides of present embodiment comprises first order outrigger arm 1, second level outrigger arm 2, supporting leg 3, telescopic oil cylinder 4, guide rail 5 and slide block 6.Second level outrigger arm 2 connects together with first order outrigger arm 1 and can relative telescopic moving, second level outrigger arm 2 can be retractable to the inside of first order outrigger arm 1, one end and the engineering machinery body of first order outrigger arm 1 flexibly connect by gyroaxis, and supporting leg 3 is installed in the front end of second level outrigger arm 2 and hangs down as for second level outrigger arm 2.
First order outrigger arm 1 and second level outrigger arm 2 are the body structure of rectangular cross section, second level outrigger arm 2 places in the first order outrigger arm 1, the two ends of telescopic oil cylinder 4 are connected with second level outrigger arm 2 with first order outrigger arm 1 by hinge pin respectively, and telescopic oil cylinder 4 can drive second level outrigger arm 2 telescopic moving in first order outrigger arm 1.
As shown in Figure 4, the cross section of first order outrigger arm 1 is a rectangle, comprise first order outrigger arm top board 11, two first order outrigger arm side plates 12 and first order outrigger arm base plates 13, first order outrigger arm top board 11, first order outrigger arm base plate 13 are welded into one with first order outrigger arm side plate 12.The cross section of second level outrigger arm 2 is a rectangle, comprise second level outrigger arm top board 21, two second level outrigger arm side plates 22 and second level outrigger arm base plates 23, second level outrigger arm top board 21, second level outrigger arm side plate 22 are welded into one with second level outrigger arm base plate 23.
In the present embodiment, inwall at two first order outrigger arm side plates 12 is equipped with guide rail 5, this guide rail 5 is two two parallel long rails arranging along first order outrigger arm 1 length direction, offer along the groove 14 of first order outrigger arm 1 length direction at the middle part of two first order outrigger arm side plates 12, guide rail 5 is arranged along the last lower edge of groove 14.
On the outer wall of two second level outrigger arm side plates 22, be separately installed with slide block 6, this slide block 6 is rectangular structure (can certainly be other planforms), slide block 6 cooperates with guide rail 5, and cooperate with the groove 14 on the first order outrigger arm side plate 12, when the piston rod telescopic moving drive second level of telescopic oil cylinder 4 outrigger arm 2 moves, slide block 6 and the guide rail on the first order outrigger arm 15 on the second level outrigger arm 2 form moving sets, and second level outrigger arm 2 is done telescopic moving with first order outrigger arm 1 along guide rail 5.
As shown in Figure 5, when slide block 6 slid into the rear end of guide rail 5, second level outrigger arm 2 was contracted to first order outrigger arm 1 inside, and this supporting leg is in contraction state; As shown in Figure 3, when slide block 6 slid into the front end of guide rail 5, second level outrigger arm 2 stretched out expansion in first order outrigger arm 1, and this supporting leg is in deployed condition.
The foregoing description only provides a kind of single-stage telescopic leg, can certainly be the multi-stage telescopic supporting leg.In multipole telescopic leg, has multistage outrigger arm, telescopic oil cylinder is the multi-stage expansion oil cylinder, guide rail 5 described in the foregoing description and slide block 6 are installed between adjacent two-stage outrigger arm too, make that adjacent two-stage outrigger arm also can be along guide rail 5 telescopic movings, and every grade of outrigger arm can be contracted to successively in the previous stage outrigger arm.
In addition, the guide rail 5 of the supporting leg that provides of present embodiment also can be a long rail that is installed in the lower edge of the groove 14 on the first order outrigger arm side plate 12.Slide block 6 is overlapped on the guide rail 5, and cooperates with groove 14 on the first order outrigger arm side plate 12.Guide rail 5 reduces by a long rail, thereby has alleviated the weight of supporting leg on the whole.
In addition, also can on the supporting leg of other types such as X supporting leg, guide rail 5 and slide block 6 be set, have above-mentioned functions equally.
Following mask body is introduced the mounting means of the supporting leg that present embodiment provides:
Basic skills: install from final stage outrigger arm and its adjacent level outrigger arm, form as one after the installation, install to high one-level outrigger arm again, be mounted to first order outrigger arm 1 at last.
Concrete steps and method:
The first step at this supporting leg not before the assembly welding, can connect or mode such as bonding is fixed together guide rail 5 and first order outrigger arm 1 by welding, bolt;
In second step, can connect or mode such as bonding is fixed together slide block 6 and second level outrigger arm 2 by welding, bolt;
In the 3rd step, second level outrigger arm 2 is packed in the first order outrigger arm 1 that has installed with telescopic oil cylinder 4;
The 4th step, in appropriate position slide block 6 is put into guide rail 5, be fixed together with second level outrigger arm 2, can realize second level outrigger arm 2 moving in the middle of first order outrigger arm 1, finish supporting leg and launch or contractive action.
As can be seen, the supporting leg that the foregoing description provides, owing on the first order outrigger arm side plate 12 of first order outrigger arm 1, be provided with guide rail 5, on the second level of second level outrigger arm 2 outrigger arm side plate 22, be provided with slide block 6, slide block 6 cooperates with guide rail 5, second level outrigger arm 2 by guide rail 5 and slide block 6 be slidingly matched and first order outrigger arm 1 is done telescopic moving, thereby, active force is dispersed on a first order outrigger arm side plate 12 and the second level outrigger arm side plate 22, reduce the top board and the base plate contact position concentrated stress of first order outrigger arm 1 and second level outrigger arm 2, reduce top board and base plate and weld seam and bear active force, reduced fatigue failure the weld seam of first order outrigger arm 1 and second level outrigger arm 2.
In addition, when supporting leg was stressed, first order outrigger arm 1 increased with second level outrigger arm 2 contact surfaces, has reduced maximum stress, and the supporting leg integrated stress distributes more even, thereby can suitably reduce supporting leg steel plate thickness, further reduces supporting leg and engineering machinery complete vehicle weight.And offer groove 14 in the middle of the first order outrigger arm side plate 12 of first order outrigger arm 1, the weight of less supporting leg and engineering machinery, and can save steel, reduce cost.
With reference to figure 6, the viewgraph of cross-section of second kind of specific embodiment of the supporting leg that Fig. 6 provides for the utility model.
As shown in Figure 6, the difference of the supporting leg that the supporting leg that present embodiment provides and the utility model first embodiment provide is that the guide rail 5 of the supporting leg that present embodiment provides is two long rails that are installed on first order outrigger arm side plate 12 length directions.Do not offer groove on first order outrigger arm side plate 12, slide block 6 is installed on the second level outrigger arm side plate 22, and slide block 6 cooperates with guide rail 5.
With reference to figure 7 and Fig. 8, the structural representation of the third specific embodiment of the supporting leg that Fig. 7 provides for the utility model; Fig. 8 is the viewgraph of cross-section of supporting leg among Fig. 7.
As shown in Figure 7 and Figure 8, the difference of the supporting leg that the supporting leg that present embodiment provides and the utility model first embodiment provide is, first order outrigger arm side plate 12 inboards of the first order outrigger arm 1 that present embodiment provides are provided with first strengthening rib strip 7 and the 4th strengthening rib strip 10, second level outrigger arm side plate 22 arranged outside of the second level outrigger arm 2 corresponding with it have second strengthening rib strip 8 and the 3rd strengthening rib strip 9, first strengthening rib strip 7 and the 4th strengthening rib strip 10 lay respectively at the two ends near described first order outrigger arm side plate 12 inside sidewalls, second strengthening rib strip 8 and the 3rd strengthening rib strip 9 lay respectively at the two ends near outrigger arm side plate 22 outsides, the second level, first strengthening rib strip 7 and second strengthening rib strip 8 fasten and form sliding supporting structure, the 3rd strengthening rib strip 9 and the 4th strengthening rib strip 10 fasten and form movement support structures, and second strengthening rib strip 8 of second level outrigger arm 2 can slide by relative first strengthening rib strip 7 and the 4th strengthening rib strip 10 with first order outrigger arm 1 with the 3rd strengthening rib strip 9.
Supporting leg in the present embodiment has the technique effect that the supporting leg among first embodiment has equally, does not repeat them here.
With reference to figure 9, the viewgraph of cross-section of the 4th kind of specific embodiment of the supporting leg that Fig. 9 provides for the utility model.
As shown in Figure 9, the difference of the supporting leg that supporting leg that present embodiment provides and the 3rd embodiment provide is, the lower end of first order outrigger arm side plate 12 inboards of the first order outrigger arm 1 that present embodiment provides has one first strengthening rib strip 7, outrigger arm side plate 22 outsides, the second level of second level outrigger arm 2 have second strengthening rib strip, 8, the first strengthening rib strips 7 and fasten the formation sliding supporting structure in second strengthening rib strip 8.
Equally, above-mentioned third and fourth embodiment only provides a kind of single-stage telescopic leg, can certainly be the multi-stage telescopic supporting leg.In the multi-stage telescopic supporting leg, has multipole outrigger arm, telescopic oil cylinder also is multipole telescopic oil cylinder, between adjacent two-stage outrigger arm, the strengthening rib strip described in the foregoing description is installed too, make that adjacent two-stage outrigger arm can be along the strengthening rib strip telescopic moving, and every grade of outrigger arm can be contracted to successively in the front leg strut arm.
The supporting leg that above embodiment provides can be applied on the various mobile engineering machineries.Following examples provide a kind of engineering machinery of using this supporting leg, and in the present embodiment, engineering machinery is an example with the concrete mixer with boom system specifically.
This concrete mixer has the basic element of character of vehicles such as driver's cabin, propons, back axle and chassis.Its top, chassis install and fix capstan head and with this fixing boom system of being connected of capstan head, on this boom system boom is installed.This boom system may comprise a plurality of bar sections, and under the drive of described fixedly capstan head, this boom system can be done 360 degree revolutions; Under the control of hydraulic system, each bar section of boom system can stretch, thereby drives the cloth that boom is realized interior differing heights of certain limit and position.This concrete mixer also has the supporting leg that the utility model the foregoing description provides.
The concrete mixer that present embodiment provides is equipped with the supporting leg that the foregoing description provides, because this supporting leg has sliding supporting structure, improve the stressing conditions of supporting leg, improve the ability of the bearing load of outrigger arm, and then stability and safety during the work that improves this concrete mixer.
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. supporting leg that is used for engineering machinery, comprise two-stage mutual sheathing outrigger arm together at least, the telescopic moving relatively of adjacent two-stage outrigger arm, it is characterized in that, be respectively arranged with slide block and guide rail on the described adjacent two-stage outrigger arm, described slide block cooperates with described guide rail, and described adjacent two-stage outrigger arm can be along described slide block and guide rail telescopic moving.
2. supporting leg according to claim 1 is characterized in that, described guide rail is the groove that is opened on the side plate of an outrigger arm in the described adjacent two-stage outrigger arm, and described groove is arranged along the length direction of this outrigger arm.
3. supporting leg according to claim 2 is characterized in that, described groove is positioned at the centre position of the side plate vertical direction of described outrigger arm.
4. supporting leg according to claim 1, it is characterized in that, described guide rail is along two parallel long rails arranging on the side plate of an outrigger arm in the described adjacent two-stage outrigger arm, and described two parallel long rails form guide-track groove, and described slide block cooperates with described guide-track groove.
5. supporting leg according to claim 4 is characterized in that, described guide rail is installed in the side plate inboard of an outrigger arm in the described adjacent two-stage outrigger arm, and described slide block is installed in the side plate outside of another outrigger arm.
6. supporting leg according to claim 1 is characterized in that, described guide rail is a long rail of arranging along the side plate inside length direction of an outrigger arm in the described adjacent two-stage outrigger arm, and described slide block is overlapped on this long rail.
7. supporting leg according to claim 1 is characterized in that, described guide rail is inboard at least two strengthening rib strips that are provided with of side plate that are installed in an outrigger arm in the described adjacent two-stage outrigger arm; Described slide block is at least two strengthening rib strips of the side plate arranged outside of another outrigger arm in described adjacent two-stage outrigger arm, and the corresponding contact of the strengthening rib strip of described adjacent two-stage outrigger arm fastens.
8. an engineering machinery is characterized in that, this project machinery is equipped with each described supporting leg of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201369511U CN201280820Y (en) | 2008-09-24 | 2008-09-24 | Supporting leg and engineering machinery with the supporting leg |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201369511U CN201280820Y (en) | 2008-09-24 | 2008-09-24 | Supporting leg and engineering machinery with the supporting leg |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201280820Y true CN201280820Y (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201369511U Expired - Fee Related CN201280820Y (en) | 2008-09-24 | 2008-09-24 | Supporting leg and engineering machinery with the supporting leg |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201280820Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102582591A (en) * | 2012-03-19 | 2012-07-18 | 三一重工股份有限公司 | Engineering machine and supporting device for same |
| CN102080999B (en) * | 2009-11-30 | 2012-07-25 | 徐州重型机械有限公司 | Engineering vehicle and device for detecting stress of supporting leg thereof |
| CN103612621A (en) * | 2013-11-25 | 2014-03-05 | 中联重科股份有限公司 | Supporting leg device of engineering vehicle and engineering vehicle |
| CN111071217A (en) * | 2019-12-31 | 2020-04-28 | 三一汽车制造有限公司 | Telescopic support leg and vehicle |
-
2008
- 2008-09-24 CN CNU2008201369511U patent/CN201280820Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080999B (en) * | 2009-11-30 | 2012-07-25 | 徐州重型机械有限公司 | Engineering vehicle and device for detecting stress of supporting leg thereof |
| CN102582591A (en) * | 2012-03-19 | 2012-07-18 | 三一重工股份有限公司 | Engineering machine and supporting device for same |
| CN102582591B (en) * | 2012-03-19 | 2014-12-10 | 三一重工股份有限公司 | Engineering machine and supporting device for same |
| CN103612621A (en) * | 2013-11-25 | 2014-03-05 | 中联重科股份有限公司 | Supporting leg device of engineering vehicle and engineering vehicle |
| CN111071217A (en) * | 2019-12-31 | 2020-04-28 | 三一汽车制造有限公司 | Telescopic support leg and vehicle |
| CN111071217B (en) * | 2019-12-31 | 2021-09-10 | 三一汽车制造有限公司 | Telescopic support leg and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: 31 Zhangjiakou Wind Power Technology Co., Ltd. Assignor: Sanyi Heavy Industry Co., Ltd. Contract record no.: 2010990000490 Denomination of utility model: Landing leg and engineering machinery with the same Granted publication date: 20090729 License type: Exclusive License Record date: 20100705 |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: 31 Zhangjiakou Wind Power Technology Co., Ltd. Assignor: Sanyi Heavy Industry Co., Ltd. Contract record no.: 2010990000490 Date of cancellation: 20110402 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20130924 |