CN102297180A - Supporting leg locking system and mobile engineering machinery - Google Patents
Supporting leg locking system and mobile engineering machinery Download PDFInfo
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- CN102297180A CN102297180A CN 201110227493 CN201110227493A CN102297180A CN 102297180 A CN102297180 A CN 102297180A CN 201110227493 CN201110227493 CN 201110227493 CN 201110227493 A CN201110227493 A CN 201110227493A CN 102297180 A CN102297180 A CN 102297180A
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- supporting leg
- control switch
- oil
- hydraulic control
- oil cylinder
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Abstract
The invention relates to the technical field of engineering machinery, and discloses a supporting leg locking system which is used for locking a supporting leg after the supporting leg is contacted with the ground; the supporting leg locking system comprises hydraulic control switch modules which are serially connected onto an oil inlet channel or an oil return channel of a supporting leg unfolding oil cylinder; the control ends of the hydraulic control switch modules are communicated with a rodless cavity of a supporting leg supporting oil cylinder; and when the pressure in the rodless cavity of the supporting leg supporting oil cylinder is higher than a preset value, hydraulic oil in the rodless cavity of the supporting leg supporting oil cylinder drives the hydraulic control switch modules to be closed. The supporting leg locking system in the structure can lock the supporting leg after the supporting leg is contacted with the ground from a hardware perspective and prevent the supporting leg from being damaged due to misoperation, and reduces safety hidden hazards; in addition, the performance is reliable, a locking effect is obvious, and no any impact on an original supporting leg operation method exists; and the supporting leg locking system in the structure has low cost and is extremely easy to implement. The invention also discloses mobile engineering machinery with the supporting leg locking system.
Description
Technical field
The present invention relates to technical field of engineering machinery, relate in particular to a kind of supporting leg latch system that is used for behind supporting leg support ground, supporting leg being carried out locking.The invention still further relates to a kind of portable engineering machinery with above-mentioned supporting leg latch system.
Background technique
Along with the fast development of China's economic construction, various portable engineering machinery are applied in the various engineering constructions more and more widely.
For the ease of transition, satisfy the construction operation needs simultaneously, portable engineering machinery such as concrete mixer, lifting vehicle have suitable traveling mechanism and a plurality of work machine body telescopic supporting leg on every side that is arranged in usually; Each supporting leg generally includes and launches oil cylinder and support cylinder, launches oil cylinder and can realize supporting leg expansion and withdrawal in the horizontal direction, and support cylinder can be realized expansion and the withdrawal of supporting leg at vertical direction.
With the concrete mixer is example, the operation of supporting leg mainly is to launch the expansion and the withdrawal of oil cylinder, telescopic oil cylinder by a plurality of multi-way valve controls, as long as the power abundance that arm-pump provides, each supporting leg can carry out the expansion and the withdrawal of substantially horizontal and vertical direction at any time simultaneously.
The concrete mixer supporting leg launches, article four, after supporting leg is propped up fully, the weight that car load is tens of tons will act on four supporting legs fully, if this moment the operator faulty operation supporting leg deploying handles, supporting leg launches oil cylinder and moves in the horizontal direction, will produce huge distortion power to supporting leg, causes a series of consequences such as supporting leg cracking easily, in case supporting leg lost efficacy, the Safety performance of car load will be affected.
In the prior art, usually reminding operator after supporting leg supports ground with eye-catching sign on the supporting leg, must not launch or recovery operation, but supporting leg deploying handles and each jib multi-way valve operating grip are separated by nearer, and the concrete that the explanation sign is often splashed hides, behind supporting leg support ground, operator very easily misoperation occurs and have pulled the supporting leg deploying handles, and then make supporting leg expansion oil cylinder move in the horizontal direction.
Therefore, behind supporting leg support ground, how to prevent that supporting leg from launching oil cylinder and moving in the horizontal direction, become the technical barrier that those skilled in the art need to be resolved hurrily.
Summary of the invention
First purpose of the present invention provides a kind of supporting leg latch system, behind supporting leg support ground supporting leg is carried out locking, prevents that supporting leg from launching oil cylinder and moving in the horizontal direction.Another object of the present invention provides a kind of portable engineering machinery with above-mentioned supporting leg latch system.
In order to realize above-mentioned first purpose, the invention provides a kind of supporting leg latch system, be used for behind supporting leg support ground, supporting leg being carried out locking, it is characterized in that, comprise that being connected on supporting leg launches the in-line of oil cylinder or the hydraulic control switch module on the oil circuit, the control end of this hydraulic control switch module is communicated with the rodless cavity of supporting leg support cylinder; Pressure in the rodless cavity of described supporting leg support cylinder is during greater than predefined value, and the hydraulic oil in the rodless cavity of described supporting leg support cylinder drives described hydraulic control switch module and is in closed condition.
Preferably, described hydraulic control switch module is connected on supporting leg and launches on the in-line or oil circuit of hydraulic lock of oil cylinder.
Preferably, described hydraulic control switch module is connected on the hydraulic lock of described supporting leg expansion oil cylinder and the in-line or oil circuit between the supporting leg expansion oil cylinder.
Preferably, described hydraulic control switch module is connected on described hydraulic lock and described supporting leg and launches on the oil circuit between the rod chamber of oil cylinder.
Preferably, described hydraulic control switch module is connected on described hydraulic lock and described supporting leg and launches on the oil circuit between the rodless cavity of oil cylinder.
Preferably, described hydraulic control switch module is a hydraulicchange-over valve.
Preferably, described hydraulic control switch module is the pushswitch valve.
Supporting leg latch system provided by the invention comprises the hydraulic control switch module, and the hydraulic control switch module is connected on supporting leg and launches on the in-line or oil circuit of oil cylinder, and the control end of this hydraulic control switch module is communicated with the rodless cavity of supporting leg support cylinder; Pressure in the rodless cavity of described supporting leg support cylinder is during greater than predefined value, and the hydraulic oil in the rodless cavity of described supporting leg support cylinder drives described hydraulic control switch module and is in closed condition.
When supporting leg supportted down, the pressure in the rodless cavity of supporting leg support cylinder was little; But when behind the supporting leg support ground and when beginning to bear a part of car weight, the rodless cavity internal pressure of supporting leg support cylinder sharply increases; The closing control oil pressure of setting the hydraulic control switch module is a predefined value; with the control signal oil of the pressure oil in the rodless cavity of supporting leg support cylinder as the hydraulic control switch module; behind the supporting leg support ground; the rodless cavity internal pressure of supporting leg support cylinder sharply increases; this force value is greater than described predefined value; under the effect of the pressure oil of the rodless cavity of supporting leg support cylinder; the hydraulic control switch module will be in closed condition; can stop supporting leg to launch the oil-feed or the oil return of oil cylinder; be about to supporting leg and launch the oil cylinder locking; even operator's misoperation the supporting leg deploying handles; supporting leg launches oil cylinder and still can not move in the horizontal direction; supporting leg can not be subjected to distortion power, can effectively protect supporting leg, guarantees the Safety performance of car load.
The supporting leg latch system of this structure has been realized behind the supporting leg support ground can effectively preventing because misoperation to the infringement of supporting leg, has been lowered potential safety hazard the locking of supporting leg from hardware; And reliable performance, locking effect are obvious, to original supporting leg mode of operation without any influence; The supporting leg latch system of this structure is with low cost, very easily implements.
For realizing above-mentioned second purpose, the present invention also provides a kind of portable engineering machinery, comprise the supporting leg that constitutes by supporting leg expansion oil cylinder, supporting leg support cylinder, also comprise the supporting leg latch system that claim is above-mentioned, because above-mentioned supporting leg latch system has above-mentioned technique effect, the portable engineering machinery with this supporting leg latch system also should possess the corresponding techniques effect.
In the concrete scheme, this movable type engineering machinery is a concrete mixer.
Description of drawings
Fig. 1 is the structural representation of a kind of embodiment of supporting leg latch system provided by the present invention;
Fig. 2 is the structural representation of the another kind of embodiment of supporting leg latch system provided by the present invention;
Wherein, among Fig. 1-Fig. 2:
Supporting leg launches oil cylinder 1, hydraulic lock 11, supporting leg support cylinder 2, hydraulic lock 21, hydraulicchange-over valve 3;
Supporting leg launches oil cylinder 1 ', hydraulic lock 11 ', supporting leg support cylinder 2 ', hydraulic lock 21 ', hydraulicchange-over valve 3 '.
Embodiment
In order to make those skilled in the art better understand technological scheme of the present invention, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please referring to Fig. 1, Fig. 1 is the structural representation of a kind of embodiment of supporting leg latch system provided by the present invention.
As shown in Figure 1, supporting leg latch system provided by the present invention is used for behind supporting leg support ground supporting leg being carried out locking, and supporting leg comprises that supporting leg launches oil cylinder 1 and supporting leg support cylinder 2; This supporting leg latch system comprises the hydraulic control switch module, and the hydraulic control switch module is connected on supporting leg and launches on the in-line or oil circuit of oil cylinder 1, and the control end of this hydraulic control switch module is communicated with the rodless cavity of supporting leg support cylinder 2; Pressure in the rodless cavity of described supporting leg support cylinder 2 is during greater than predefined value, and the hydraulic oil in the rodless cavity of described supporting leg support cylinder 2 drives described hydraulic control switch module and is in closed condition.
When supporting leg supportted down, the pressure in the rodless cavity of supporting leg support cylinder 2 was little; But when behind the supporting leg support ground and when beginning to bear a part of car weight, the rodless cavity internal pressure of supporting leg support cylinder 2 sharply increases; The closing control oil pressure of setting the hydraulic control switch module is a predefined value; with the control signal oil of the pressure oil in the rodless cavity of supporting leg support cylinder 2 as the hydraulic control switch module; behind the supporting leg support ground; the rodless cavity internal pressure of supporting leg support cylinder 2 sharply increases; this force value is greater than described predefined value; under the effect of the pressure oil of the rodless cavity of supporting leg support cylinder 2; the hydraulic control switch module will be in closed condition; can stop supporting leg to launch the oil-feed or the oil return of oil cylinder 1; be about to supporting leg and launch oil cylinder 1 locking; even operator's misoperation the supporting leg deploying handles; supporting leg launches oil cylinder 1 and still can not move in the horizontal direction; supporting leg can not be subjected to distortion power, can effectively protect supporting leg, guarantees the Safety performance of car load.
The supporting leg latch system of this structure has been realized behind the supporting leg support ground can effectively preventing because misoperation to the infringement of supporting leg, has been lowered potential safety hazard the locking of supporting leg from hardware; And reliable performance, locking effect are obvious, to original supporting leg mode of operation without any influence; The supporting leg latch system of this structure is with low cost, very easily implements.
In the preferred version, the hydraulic control switch module can be hydraulicchange-over valve 3, the filler opening of this hydraulicchange-over valve 3, oil outlet all is connected on supporting leg and launches on the in-line or oil circuit of oil cylinder 1, the control port of this hydraulicchange-over valve 3 is communicated with the rodless cavity of supporting leg support cylinder 2, behind the supporting leg support cylinder 2 support ground, the pressure of rodless cavity sharply increases, this pressure is greater than the closing control oil pressure of hydraulicchange-over valve 3, the spring that pressure oil in the rodless cavity drives in the hydraulicchange-over valve 3 makes the commutation of valve piece make hydraulicchange-over valve 3 be in closed condition, and then can stop supporting leg to launch the oil-feed or the oil return of oil cylinder 1.
This scheme adopts hydraulicchange-over valve 3 as the hydraulic control switch module, and is simple in structure, with low cost.
In a kind of concrete mode of execution, in order to prevent that supporting leg from launching oil cylinder 1, the rod chamber of supporting leg support cylinder 2 or the hydraulic oil generation oil return phenomenon in the rodless cavity, usually on supporting leg launches the in-line, oil circuit of oil cylinder 1, be provided with hydraulic lock 11, on the in-line of supporting leg support cylinder 2, oil circuit, be provided with hydraulic lock 21.
In the concrete scheme, as shown in Figure 1, described hydraulicchange-over valve 3 can be connected on supporting leg and launch on the in-line or oil circuit of hydraulic lock 11 of oil cylinder 1, and the filler opening of hydraulicchange-over valve 3 is communicated with hydraulic oil source, and the oil outlet of hydraulicchange-over valve 3 is communicated with the filler opening of hydraulic lock 11.
In the foregoing description, hydraulicchange-over valve is connected on supporting leg and launches on the in-line or oil circuit of hydraulic lock 11 of oil cylinder, the present invention is not limited thereto, hydraulicchange-over valve also can be connected on described supporting leg and launch on the hydraulic lock 11 of oil cylinder and the in-line or oil circuit between the supporting leg expansion oil cylinder, as shown in Figure 2, the filler opening of hydraulicchange-over valve 3 ' is communicated with the oil outlet of hydraulic lock 11 ', the oil outlet of hydraulicchange-over valve 3 ' is communicated with the rod chamber that supporting leg launches oil cylinder 1 ', the control port of hydraulicchange-over valve 3 ' is communicated with the rodless cavity of supporting leg support cylinder 2 ', in the concrete scheme, the control port of hydraulicchange-over valve 3 ' can be connected on the rodless cavity and the pipeline between the hydraulic lock 21 ' of supporting leg support cylinder 2 '.
Be appreciated that, described hydraulicchange-over valve 3 ' also can be connected on hydraulic lock 11 ' and described supporting leg and launch on the oil circuit between the rodless cavity of oil cylinder 1 ', the filler opening of hydraulicchange-over valve 3 ' is communicated with the oil outlet of hydraulic lock 11 ', the oil outlet of hydraulicchange-over valve 3 ' is communicated with the rodless cavity that supporting leg launches oil cylinder 1 ', and the control port of hydraulicchange-over valve 3 ' is communicated with the rodless cavity of supporting leg support cylinder 2 '.
Among the above embodiment; the hydraulic control switch module adopts hydraulicchange-over valve; the present invention is not limited thereto; the hydraulic valve bank that the hydraulic control switch module can also adopt hydraulicchange-over valve, be made up of a plurality of hydrovalves; all following supporting legs of can closing of rodless cavity pressure oil driving that is implemented in launch the in-line of oil cylinder or the module of oil circuit, all should be in protection scope of the present invention.
The present invention also provides a kind of portable engineering machinery, comprise the supporting leg that constitutes by supporting leg expansion oil cylinder, supporting leg support cylinder, also comprise the supporting leg latch system that claim is above-mentioned, because above-mentioned supporting leg latch system has above-mentioned technique effect, portable engineering machinery with this supporting leg latch system also should possess the corresponding techniques effect, no longer is described in detail at this.
In the concrete scheme, this movable type engineering machinery can be concrete mixer.
The above only is the description of the preferred implementation of invention; should be understood that; because the finiteness of literal expression; and objectively have unlimited concrete structure; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. supporting leg latch system, be used for behind supporting leg support ground, supporting leg being carried out locking, it is characterized in that comprise that being connected on supporting leg launches the in-line of oil cylinder or the hydraulic control switch module on the oil circuit, the control end of this hydraulic control switch module is communicated with the rodless cavity of supporting leg support cylinder; Pressure in the rodless cavity of described supporting leg support cylinder is during greater than predefined value, and the hydraulic oil in the rodless cavity of described supporting leg support cylinder drives described hydraulic control switch module and is in closed condition.
2. supporting leg latch system according to claim 1 is characterized in that, described hydraulic control switch module is connected on supporting leg and launches on the in-line or oil circuit of hydraulic lock of oil cylinder.
3. supporting leg latch system according to claim 1 is characterized in that, described hydraulic control switch module is connected on described supporting leg and launches on the hydraulic lock of oil cylinder and the in-line or oil circuit between the supporting leg expansion oil cylinder.
4. supporting leg latch system according to claim 3 is characterized in that, described hydraulic control switch module is connected on described hydraulic lock and described supporting leg and launches on the oil circuit between the rod chamber of oil cylinder.
5. supporting leg latch system according to claim 3 is characterized in that, described hydraulic control switch module is connected on described hydraulic lock and described supporting leg and launches on the oil circuit between the rodless cavity of oil cylinder.
6. according to each described supporting leg latch system of claim 1-5, it is characterized in that described hydraulic control switch module is a hydraulicchange-over valve.
7. according to each described supporting leg latch system of claim 1-5, it is characterized in that described hydraulic control switch module is the pushswitch valve.
8. a portable engineering machinery comprises the supporting leg that is made of supporting leg expansion oil cylinder, supporting leg support cylinder, it is characterized in that, also comprises each described supporting leg latch system of claim 1-7.
9. portable engineering machinery according to claim 8 is characterized in that, this movable type engineering machinery is a concrete mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110227493 CN102297180B (en) | 2011-08-09 | 2011-08-09 | Supporting leg locking system and mobile engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110227493 CN102297180B (en) | 2011-08-09 | 2011-08-09 | Supporting leg locking system and mobile engineering machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102297180A true CN102297180A (en) | 2011-12-28 |
| CN102297180B CN102297180B (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110227493 Expired - Fee Related CN102297180B (en) | 2011-08-09 | 2011-08-09 | Supporting leg locking system and mobile engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102297180B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777899A (en) * | 1972-08-14 | 1973-12-11 | Harrischfeger Corp | Bounce-preventing control for hydraulic cylinder |
| CN2228860Y (en) * | 1995-06-26 | 1996-06-12 | 贾庭山 | Vehicle capable of fast replacing body |
| DE10162819A1 (en) * | 2001-12-14 | 2003-07-03 | Novafluid Wacker Hydraulik Gmb | Hydraulic control valve has on outer circumference of piston or slider a detent groove for engaging with ratchet mounted displaceable in ram housing and spring-loaded towards groove |
| DE102006034864A1 (en) * | 2006-07-25 | 2008-01-31 | Aros Hydraulik Gmbh | Control system for e.g. locking pin, has locking and unlocking type pressure chambers connected to main conduit, where pressure control valve is attached to unlocking type chamber to avoid reverse flow of fluid from unblocking type chamber |
| CN102003423A (en) * | 2010-12-17 | 2011-04-06 | 徐州重型机械有限公司 | Hydraulic bidirectional lock and crane with same |
-
2011
- 2011-08-09 CN CN 201110227493 patent/CN102297180B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3777899A (en) * | 1972-08-14 | 1973-12-11 | Harrischfeger Corp | Bounce-preventing control for hydraulic cylinder |
| CN2228860Y (en) * | 1995-06-26 | 1996-06-12 | 贾庭山 | Vehicle capable of fast replacing body |
| DE10162819A1 (en) * | 2001-12-14 | 2003-07-03 | Novafluid Wacker Hydraulik Gmb | Hydraulic control valve has on outer circumference of piston or slider a detent groove for engaging with ratchet mounted displaceable in ram housing and spring-loaded towards groove |
| DE102006034864A1 (en) * | 2006-07-25 | 2008-01-31 | Aros Hydraulik Gmbh | Control system for e.g. locking pin, has locking and unlocking type pressure chambers connected to main conduit, where pressure control valve is attached to unlocking type chamber to avoid reverse flow of fluid from unblocking type chamber |
| CN102003423A (en) * | 2010-12-17 | 2011-04-06 | 徐州重型机械有限公司 | Hydraulic bidirectional lock and crane with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102297180B (en) | 2013-01-02 |
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| SE01 | Entry into force of request for substantive examination | ||
| 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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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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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20170809 |