CN202089047U - Construction machine and supporting leg system thereof - Google Patents
Construction machine and supporting leg system thereof Download PDFInfo
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- CN202089047U CN202089047U CN2011202093110U CN201120209311U CN202089047U CN 202089047 U CN202089047 U CN 202089047U CN 2011202093110 U CN2011202093110 U CN 2011202093110U CN 201120209311 U CN201120209311 U CN 201120209311U CN 202089047 U CN202089047 U CN 202089047U
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- supporting leg
- control device
- pressure control
- pressure
- construction machinery
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Abstract
The utility model discloses a supporting leg system of a construction machine. The supporting leg system comprises a supporting leg and an expansion and contraction device, wherein one end of the supporting leg is connected to the vehicle frame of the construction machine; the expansion and contraction device drives the supporting leg to unfold or fold, and adopts gas or liquid as a force transmission medium; and a pressure control device controlling the pressure of the gas or the liquid of the expansion and contraction device is arranged on a high-voltage circuit driving the supporting leg to unfold. As the supporting leg system comprises the pressure control device, when the supporting leg is unfolded and a supporting leg lock is not unlocked due to misoperation or other reasons, the pressure control device can ensure pressure born by the expansion and contraction device to be within the maximum service pressure range required for unfolding the supporting leg. Therefore, the supporting leg lock is effectively prevented from being damaged; the use cost is saved; the safety in operation when the supporting leg is unfolded is improved; and the personnel safety of operating personnel is guaranteed. Moreover, the utility model further discloses the construction machine comprising the supporting leg system.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly a kind of leg system of construction machinery and equipment.In addition, the utility model also relates to the construction machinery and equipment that comprises above-mentioned leg system.
Background technology
Concrete pump truck is a kind of representative type construction machinery and equipment, it is widely used in the concrete construction of railway and engineerings such as highway tunnel, bridges and culverts, water power, mine, skyscraper and national defence, for large-scale concrete pump truck, in order to satisfy its job safety, stable needs, generally around vehicle frame, be provided with supporting leg.
When concrete pump truck is in driving states, supporting leg is fixed on the vehicle frame by the supporting leg latching device, and before pump concrete, supporting leg trails from vehicle frame earlier, by the support cylinder that is arranged at the supporting leg end vehicle frame is supported on the ground then, begins pump concrete at last; Finishing of the expansion of supporting leg and support part is to rely on the supporting leg hydraulic control system of concrete pump truck to realize.
Please refer to Fig. 1, Fig. 1 is the fundamental diagram of supporting leg mode in the leg system of a kind of representative type concrete pump truck in the prior art, this figure only illustrates the work mode of concrete pump truck part supporting leg, and the work mode of other supporting legs is similar, so save.
A kind of supporting leg one end of representative type concrete pump truck connects to ground in the prior art, is provided with to launch oil cylinder 1 supporting leg vehicle frame expansion or gathering relatively under the effect that launches oil cylinder 1 between supporting leg and the vehicle frame; The other end of supporting leg is provided with support cylinder 2, after the relative vehicle frame of supporting leg launches, support cylinder 2 stretch downwards the car body that is supported on the ground concrete pump truck hold up guarantee the pump concrete operation firmly, in order to guarantee the reliability of two hydraulic ram work, also be provided with in the leg system and corresponding oil cylinder bonded assembly hydraulic lock 3.
Usually, simple for the control system of concrete pump truck, the expansion oil cylinder 1 of supporting leg and the driving of support cylinder 2 all are by same hydraulic circuit control, as shown in Figure 1, reliable in order to guarantee that supporting leg supports, the pressure operated by rotary motion scope of hydraulic circuit is between the 25Mpa to 27Mpa.
Yet, launch the required propulsive effort of oil cylinder 1 normal operation and be generally 5Mpa to 10Mpa, be far smaller than the required propulsive effort (pressure of hydraulic circuit) of support cylinder 2, the mode of the supporting leg of prior art, if supporting leg is pinned follow-up extension by the supporting leg lock and opens, expansion oil cylinder 1 is built the pressure to 25Mpa to 27Mpa, cause the supporting leg lock to damage the personal safety that may jeopardize the staff when serious.
Therefore, how providing a kind of safety performance than higher leg system, is those skilled in the art's problem demanding prompt solutions.
The utility model content
The purpose of this utility model aims to provide a kind of leg system, and it has than higher safety.Another purpose of the present utility model aims to provide a kind of construction machinery and equipment that comprises above-mentioned leg system.
For solving the problems of the technologies described above, the utility model provides a kind of leg system of construction machinery and equipment, comprise that an end is connected in the supporting leg on the vehicle frame of described construction machinery and equipment, and the retractor device that drives described supporting leg expansion or draw in, described retractor device, drives high pressure road that described supporting leg launches and is provided with and is used to control the gas of described retractor device or the pressure control device of fluid pressure as the power transmission medium with gas or liquid.
Preferably, described retractor device comprises rod chamber and rodless cavity, and described pressure control device is in parallel with described retractor device, is used to control the pressure of the inflow point of described pressure control device, described import is communicated with described rodless cavity, and the outlet of described pressure control device is communicated with described rod chamber.
Preferably, described retractor device comprises rod chamber and rodless cavity, described pressure control device is in parallel with described retractor device, be used to control the pressure of the inflow point of described pressure control device, described import is communicated with described rodless cavity, and the outlet of described pressure control device is communicated with gas cabinet or fluid box.
Preferably, described retractor device comprises rod chamber and rodless cavity, described pressure control device is connected with described retractor device, the pressure that is used for the exit of control presssure control setup, described outlet is communicated with described rodless cavity, and the import of described pressure control device is communicated with the propulsion source on described high pressure road.
Preferably, described retractor device is a telescopic oil cylinder, and described pressure control device is a by pass valve.
Preferably, described retractor device is a telescopic oil cylinder, and described pressure control device is a reducing valve.
Except that the leg system of above-mentioned construction machinery and equipment, the utility model also provides a kind of construction machinery and equipment, comprise power system and with described power system bonded assembly leg system, described leg system is the leg system of above-mentioned each described construction machinery and equipment.
Preferably, be specially concrete pump truck.
The leg system of a kind of construction machinery and equipment that the utility model provides, comprise that an end is connected in the supporting leg on the vehicle frame of construction machinery and equipment and drives the retractor device that supporting leg launches or draws in, as the power transmission medium, and the supporting leg high pressure road of launching is provided with and is used to control the gas of described retractor device or the pressure control device of fluid pressure described retractor device with gas or liquid.
Can control the size that retractor device drives the power that supporting leg launches by pressure control device, avoid supporting leg under lock-out state, launch the damaging influence that action produces, be damaged or endanger operating personnel's personal safety etc. as the supporting leg lock.
The utility model provides a kind of preferred embodiment in, described retractor device comprises rod chamber and rodless cavity, described pressure control device is in parallel with described retractor device, be used to control the pressure of the inflow point of described pressure control device, described import is communicated with described rodless cavity, the outlet of described pressure control device is communicated with described rod chamber, and described retractor device is telescopic oil cylinder, and described pressure control device is a by pass valve.
The oil pressure relief of regulating by pass valve a little more than or the supporting leg that equals telescopic oil cylinder launch required maximal work pressure, when the pressure on the driving oil circuit of control telescopic oil cylinder work during less than the maximal work pressure of telescopic oil cylinder, the hydraulic oil that drives in the oil circuit continues to flow in the telescopic oil cylinder, drives telescopic oil cylinder work; Be stuck on vehicle frame or other reasons when locking owing to supporting leg, when the pressure of driving oil circuit is higher than the maximal work pressure of telescopic oil cylinder, by pass valve will be opened, part hydraulic oil flows out through by pass valve, reduce the pressure that telescopic oil cylinder bore, thereby avoid the generation of accident such as supporting leg lock damages, reduce use cost, assurance operating personnel's personal safety.
Hydraulic-driven is more steady, and structure of relief valve is simple, and functional reliability is than higher.
Description of drawings
Fig. 1 is the fundamental diagram of supporting leg control in the leg system of a kind of representative type concrete pump truck in the prior art;
Fig. 2 is the fundamental diagram of a kind of specific embodiment of supporting leg control in the leg system of construction machinery and equipment provided by the utility model;
Fig. 3 is the C place partial enlarged drawing of supporting leg control shown in Figure 2;
Fig. 4 is the fundamental diagram of the another kind of specific embodiment of supporting leg control in the leg system of construction machinery and equipment provided by the utility model;
Fig. 5 is the D place partial enlarged drawing of supporting leg control shown in Figure 4.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1:
1 launches oil cylinder; 2 support cylinders; 3 hydraulic lock.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 2 to Fig. 5:
41 hydraulic lock; 42 telescopic oil cylinders; 43 support cylinders; 44 by pass valves; 46 reducing valves; The T oil outlet; The P oil inlet; The working hole of A retractor device.
The specific embodiment
Core of the present utility model aims to provide a kind of leg system of construction machinery and equipment, and it has than higher safety.Another core of the present utility model aims to provide a kind of construction machinery and equipment that comprises above-mentioned leg system.
Be without loss of generality, this paper is that oscillating support leg is that example is introduced with the supporting leg in the leg system, it will be understood by those skilled in the art that also not getting rid of this paper provides that supporting leg is a telescopic outrigger in the leg system.
In order to make those skilled in the art understand the technical solution of the utility model better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is the fundamental diagram of a kind of specific embodiment of supporting leg control in the leg system of construction machinery and equipment provided by the utility model, this figure only illustrates the work mode of construction machinery and equipment part supporting leg, and the work mode of other supporting legs is similar, so save; Fig. 3 is the C place partial enlarged drawing of supporting leg mode shown in Figure 2.
In a kind of specific embodiment, the leg system of a kind of construction machinery and equipment provided by the utility model, comprise the supporting leg on the vehicle frame that is connected in construction machinery and equipment, supporting leg can be an end and vehicle frame pivotally attached oscillating support leg, the quantity that is articulated in the oscillating support leg on the vehicle frame is set according to the different operation needs of construction machinery and equipment, can four, also can be six or other quantity, also can be the multi-joint telescoping supporting leg; Leg system also comprises the retractor device that drives the supporting leg expansion or draw in, and retractor device can be telescopic oil cylinder 42, also can be telescopic cylinder, and promptly the drive source of corresponding retractor device is respectively hydraulic circuit and gas circuit.
On the high pressure road that supporting leg launches, also be provided with pressure control device in the leg system provided by the utility model.Can control the size that retractor device drives the power that supporting leg launches by pressure control device, avoid supporting leg under lock-out state, launch the damaging influence that action produces, be damaged or endanger operating personnel's personal safety etc. as the supporting leg lock.
In a kind of specific embodiment, retractor device comprises rod chamber and rodless cavity, and pressure control device is in parallel with described retractor device, is used for the pressure of the inflow point of control presssure control setup, import is communicated with rodless cavity, and the outlet of pressure control device is communicated with rod chamber; The expansion pressure of pressure control device and retractor device parallel way control retractor device in this embodiment, when pressure control device breaks down maintenance, can close this parallel connection road, thereby the work in the time of can not influencing the retractor device proper operation, and the two ends of pressure control device connect rod chamber and rodless cavity, can realize that retractor device launches the accurate control of pressure.
In the another kind of specific embodiment, retractor device can comprise rod chamber and rodless cavity, pressure control device is in parallel with retractor device, be used to control the pressure of the inflow point of described pressure control device, import is communicated with described rodless cavity, and the outlet of pressure control device is communicated with gas cabinet or fluid box; The outlet of pressure control device connects gas cabinet or fluid box, by the employed medium decision of retractor device.
In this embodiment, the loop of pressure control device and the loop of retractor device are relatively independent, and work can be independent of each other mutually.
In another preferred embodiment, retractor device comprises rod chamber and rodless cavity, and pressure control device is connected with described retractor device, is used for the pressure in the exit of control presssure control setup, described outlet is communicated with rodless cavity, and the import of pressure control device is communicated with the propulsion source on high pressure road; The stationarity that this mode can retractor device be launched.
Need to prove that drive supporting leg with the stretching, extension of expansion link in the retractor device and be stretched to example, described high pressure road is the highway section between the working hole A of oil inlet P and retractor device herein.
In the respective embodiments described above, retractor device can be telescopic oil cylinder 42, usually, the driving oil circuit of the driving oil circuit of the telescopic oil cylinder 42 that drives the supporting leg expansion or draw in and the support cylinder 43 of supporting leg is same oil circuit, as shown in Figure 2, to can be understood as be respectively the expansion oil cylinder of left front supporting leg, left back supporting leg and right front supporting leg to top-down telescopic oil cylinder 42 among Fig. 2, in like manner, it is respectively the support cylinder of left front supporting leg, left back supporting leg that two support cylinders 43 among Fig. 2 can be understood as, and the sequencing of each oil cylinder work can be set by control system; The corresponding control relation that it is pointed out that above-mentioned each oil cylinder and its control supporting leg is not limited to foregoing description just in order to understand conveniently.
Hydraulic oil is flowed into by oil inlet P, flows back to hydraulic reservoir through each Hydraulic Elements by oil outlet T, for increasing the functional reliability of telescopic oil cylinder 42, hydraulic lock 41 Hydraulic Elements such as grade can also be set in the system.Telescopic oil cylinder 42 can be arranged at the inboard of supporting leg, also can be arranged at the outside of supporting leg, need to prove, the described inboard and the described outside are that expansion direction with supporting leg is reference, along the supporting leg expansion direction that supporting leg is inboard near the side location of vehicle frame, side away from vehicle frame is the outside, and promptly supporting leg launches from inside to outside; The expansion of supporting leg can be realized by telescopic oil cylinder 42 corresponding actions respectively.
Pressure control device can be by pass valve 44, and the oil inlet of by pass valve 44 is communicated with rodless cavity, and its oil outlet is connected with rodless cavity or hydraulic reservoir, and by pass valve 44 can directly be communicated with hydraulic reservoir, also can indirect communication.The oil pressure that the pressure flexible with promoting telescopic oil cylinder in the prior art slightly equals on the high pressure road is compared, the oil pressure relief that can regulate by pass valve 44 in the utility model a little more than or equal to control the maximal work pressure of the telescopic oil cylinder 42 that supporting leg launches, when the pressure on the driving oil circuit of control telescopic oil cylinder 42 work during less than the maximal work pressure of telescopic oil cylinder 42, the hydraulic oil that drives in the oil circuit continues to flow in the telescopic oil cylinder 42, drives telescopic oil cylinder 42 work; Be stuck on vehicle frame or other reasons when locking owing to supporting leg, when the pressure of driving oil circuit is higher than the ultimate pressure of telescopic oil cylinder 42, by pass valve 44 will be opened, part hydraulic oil flows out through by pass valve 44, the maximum pressure that makes the pressure that telescopic oil cylinder 42 born is less than the pressure on the high pressure road, thereby improved the operational security that supporting leg launches.
Hydraulic-driven is more steady, and by pass valve 44 is simple in structure, and functional reliability is than higher:
A kind of preferred embodiment in, the hydraulic reservoir that is communicated with the oil outlet of by pass valve 44 can be the hydraulic reservoir of construction machinery and equipment, need not to be provided with extra hydraulic reservoir, saves cost.
Need to prove that the hydraulic reservoir that is communicated with the oil outlet of by pass valve 44 is not limited to the hydraulic reservoir of construction machinery and equipment, and independent backflow hydraulic reservoir also can be set, the oil outlet of by pass valve 44 is communicated with this backflow hydraulic reservoir.
The scheme of installation of by pass valve 44 in supporting leg control can be with reference to figure 2; when construction machinery and equipment is finished field operation; the hydraulic circuit that is communicated with telescopic oil cylinder 42 will be changed the flow direction; its hydraulic oil flow to conversion can realize by the change-over valve that is arranged in the supporting leg control; the expansion link of telescopic oil cylinder 42 moves round about, and the supporting leg ecto-entad is drawn on the carriage return frame.
In the leg system mode of retractor device ultimate pressure is not unique, below this paper provided the another kind of embodiment of realizing this paper technique effect.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the fundamental diagram of the another kind of specific embodiment of supporting leg control in the leg system of construction machinery and equipment provided by the utility model, this figure only illustrates the work mode of construction machinery and equipment part supporting leg, and the work mode of other supporting legs is similar, so save; Fig. 5 is the D place partial enlarged drawing of supporting leg mode shown in Figure 4.
In the specific embodiment of another kind of leg system, retractor device can be telescopic oil cylinder 42, and pressure control device can be reducing valve 46; Reducing valve 46 also can be one way pressure-reducing valve, the installation site of reducing valve 46 in leg system as shown in Figure 4, the oil inlet of reducing valve 46 is communicated with the propulsion source on high pressure road, and its oil outlet is communicated with the rodless cavity of telescopic oil cylinder 42.
Different with by pass valve 44 is, reducing valve 46 is controlled its oil outlet pressure by the position of regulating its inner spool in the present embodiment, make delivery pressure keep constant, thereby telescopic oil cylinder 42 is worked under constant propulsive effort, help strengthening the stability that supporting leg launches.
Need to prove that realize that the scheme of this paper technique effect is not limited to the description of above-mentioned concrete technical scheme, pressure control device can also be the control setup that comprises that by pass valve and other types parts (for example check valve) are used.
Need to prove; the upper and lower noun of locality such as grade used herein only is according to the relative position of each parts in Fig. 2, Fig. 3, Fig. 4 and Fig. 5; it only is the convenience of describing for technical scheme; be convenient to understand; should be appreciated that the noun of locality as herein described should not limit the protection domain of this patent.
The utility model also provides a kind of construction machinery and equipment, comprise power system and with described power system bonded assembly leg system, described leg system is the leg system of the construction machinery and equipment described in above arbitrary embodiment.
This project machinery has above-mentioned leg system, because above-mentioned leg system has above-mentioned technique effect, the construction machinery and equipment with this leg system also should have the corresponding techniques effect.
Particularly, above-mentioned construction machinery and equipment can be concrete pump truck.
The structure of above-mentioned other parts of concrete pump truck please refer to available data, does not do at this and gives unnecessary details.
More than a kind of construction machinery and equipment provided by the utility model and leg system thereof are described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.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. the leg system of a construction machinery and equipment, comprise that an end is connected in the supporting leg on the vehicle frame of described construction machinery and equipment, and the retractor device that drives described supporting leg expansion or draw in, described retractor device with gas or liquid as the power transmission medium, it is characterized in that the high pressure road that drives described supporting leg expansion is provided with and is used to control the gas of described retractor device or the pressure control device of fluid pressure.
2. the leg system of construction machinery and equipment as claimed in claim 1, it is characterized in that, described retractor device comprises rod chamber and rodless cavity, described pressure control device is in parallel with described retractor device, be used to control the pressure of the inflow point of described pressure control device, described import is communicated with described rodless cavity, and the outlet of described pressure control device is communicated with described rod chamber.
3. the leg system of construction machinery and equipment as claimed in claim 1, it is characterized in that, described retractor device comprises rod chamber and rodless cavity, described pressure control device is in parallel with described retractor device, be used to control the pressure of the inflow point of described pressure control device, described import is communicated with described rodless cavity, and the outlet of described pressure control device is communicated with gas cabinet or fluid box.
4. the leg system of construction machinery and equipment as claimed in claim 1, it is characterized in that, described retractor device comprises rod chamber and rodless cavity, described pressure control device is connected with described retractor device, the pressure that is used for the exit of control presssure control setup, described outlet is communicated with described rodless cavity, and the import of described pressure control device is communicated with the propulsion source on described high pressure road.
5. as the leg system of claim 2 or 3 described construction machinery and equipments, it is characterized in that described retractor device is a telescopic oil cylinder, described pressure control device is a by pass valve.
6. the leg system of construction machinery and equipment as claimed in claim 4 is characterized in that, described retractor device is a telescopic oil cylinder, and described pressure control device is a reducing valve.
7. construction machinery and equipment, comprise power system and with described power system bonded assembly leg system, it is characterized in that described leg system is the leg system of each described construction machinery and equipment of claim 1 to 6.
8. construction machinery and equipment as claimed in claim 7 is characterized in that, is specially concrete pump truck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202093110U CN202089047U (en) | 2011-06-20 | 2011-06-20 | Construction machine and supporting leg system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202093110U CN202089047U (en) | 2011-06-20 | 2011-06-20 | Construction machine and supporting leg system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202089047U true CN202089047U (en) | 2011-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202093110U Expired - Lifetime CN202089047U (en) | 2011-06-20 | 2011-06-20 | Construction machine and supporting leg system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202089047U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536963A (en) * | 2011-12-31 | 2012-07-04 | 长沙中联消防机械有限公司 | Engineering machinery as well as protection method and protection method of landing leg horizontal oil cylinder thereof |
| CN102729883A (en) * | 2012-07-19 | 2012-10-17 | 三一重工股份有限公司 | Tank-transport truck |
| CN104477812A (en) * | 2014-12-10 | 2015-04-01 | 成都群侠科技有限公司 | Railway locomotive power hydraulic control device |
| CN111720374A (en) * | 2020-06-30 | 2020-09-29 | 湖南响箭重工科技有限公司 | Pump truck with multi-stage telescopic support oil cylinder |
-
2011
- 2011-06-20 CN CN2011202093110U patent/CN202089047U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536963A (en) * | 2011-12-31 | 2012-07-04 | 长沙中联消防机械有限公司 | Engineering machinery as well as protection method and protection method of landing leg horizontal oil cylinder thereof |
| CN102729883A (en) * | 2012-07-19 | 2012-10-17 | 三一重工股份有限公司 | Tank-transport truck |
| CN104477812A (en) * | 2014-12-10 | 2015-04-01 | 成都群侠科技有限公司 | Railway locomotive power hydraulic control device |
| CN111720374A (en) * | 2020-06-30 | 2020-09-29 | 湖南响箭重工科技有限公司 | Pump truck with multi-stage telescopic support oil cylinder |
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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 |
|
| 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. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111228 |