CN201254166Y - Expansion outrigger and expansion outrigger assembly and concrete pump truck with the same - Google Patents
Expansion outrigger and expansion outrigger assembly and concrete pump truck with the same Download PDFInfo
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- CN201254166Y CN201254166Y CNU2008201310429U CN200820131042U CN201254166Y CN 201254166 Y CN201254166 Y CN 201254166Y CN U2008201310429 U CNU2008201310429 U CN U2008201310429U CN 200820131042 U CN200820131042 U CN 200820131042U CN 201254166 Y CN201254166 Y CN 201254166Y
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Abstract
The utility model discloses a retractable support leg, a retractable support leg assembly provided with such a leg, and a concrete pump truck. The retractable support leg comprises a two-stage retractable leg, a one-stage retractable leg, a fixed support leg case, a one-stage double-acting cylinder, a two-stage double-acting cylinder, and a support leg stretch and retract control circuit. The piston rod end of the one-stage double-acting cylinder is hinged with the fixed support leg case or the one-stage retractable leg, and the cylinder end of the one-stage double-acting cylinder is hinged with the one-stage retractable leg or the fixed support leg case. The cylinder end of the two-stage double-acting cylinder is hinged with the one-stage retractable leg or the two-stage retractable leg, and the piston rod end of the two-stage double-acting cylinder is hinged with the two-stage retractable leg or the one-stage retractable leg. The support leg stretch and retract control circuit controls the stretching or retraction of the one-stage cylinder and the two-stage cylinder to realize the stretching or retraction of the retractable legs. The single-stage cylinder adopted by the retractable support leg has only one pair of parts requiring matching. Therefore, the retractable support leg solves the problem that a conventional support leg retracting structure is too complicated and is high in installation and machining requirements and inconvenient to maintain.
Description
Technical field
The utility model relates to a kind of concrete pump truck, particularly relates to a kind of telescopic outrigger and has the telescopic outrigger assembly and the concrete pump truck of this supporting leg.
Background technology
Concrete pump truck has the conveying of finishing on-site concrete simultaneously and the function of cloth operation, has that pump-conveying property is good, the cloth scope big, characteristics such as walking voluntarily, maneuverability and convenient transfer.Current, concrete pump truck has obtained using widely in engineerings such as water conservancy, water power, subway, bridge, large foundation and skyscraper.Especially on the basis, low layer construction and need frequently when shifting the building site, use concrete pump truck more can show its preceence.In the jib action radius, can change the concreting position arbitrarily, not need interim at the scene tubing, can save the shop and help the time, improve work efficiency.
In working order, concrete pump truck need stretch out supporting leg with the bigger supporting leg span of acquisition, and then improves the stability of car load operation.The supporting leg form of existing concrete pump truck mainly contains two kinds: oscillating type and telescopic.Wherein, telescopic leg generally is arranged as " X " shape, for the concrete pump truck of overlength jib length, adopts the two-stage Retractive leg with the bigger supporting leg span of acquisition more, and then improves the stability of car load operation.
At present, one of mode that the telescopic leg of multi-stage oil cylinder control is comparatively used always on being sees also Fig. 1, the figure shows the structural representation of the telescopic leg of existing multi-stage oil cylinder control.As shown in Figure 1, Retractive leg is made up of secondary telescopic outrigger 23, one-level telescopic outrigger 22 and the fixed supporting leg case 21 of inside and outside nested setting, and vertical leg 25 is fixedly installed on the external part of secondary telescopic outrigger 23, and multi-stage oil cylinder 24 is arranged in the secondary telescopic outrigger chamber; Described multi-stage oil cylinder 24 is the multilayer telescoping cylinder, secondary piston places in the previous stage piston rod, wherein each grade piston rod is captiveed joint with corresponding supporting leg respectively, that is, stretching out or regaining of each grade piston rod drives corresponding supporting leg and finish and stretch out or recovery operation.But, next stage piston in the multi-stage oil cylinder is inlaid in the upper class piston rod, need higher quality of fit between the components at different levels, processing technology is comparatively complicated, in addition, for improving the flexible reliability of supporting leg, other framing members also need higher processing and manufacturing precision in the multi-stage oil cylinder mode; Further, brought the bigger problem of installation and maintenance difficulty between each parts again.
The utility model content
At the existing above-mentioned defective of existing multi-stage oil cylinder mode telescopic outrigger, the technical matters that the utility model solves is, a kind of telescopic outrigger is provided and has the telescopic outrigger assembly and the concrete pump truck of this supporting leg.
The telescopic outrigger that the utility model provides, secondary Retractive leg, one-level Retractive leg and the fixed supporting leg case of nested setting also comprise one-level two-way cylinder, secondary two-way cylinder and supporting leg extension and contraction control loop inside and outside comprising; The rod end of described one-level two-way cylinder and fixed supporting leg case or one-level Retractive leg are hinged, and its cylinder barrel end and one-level Retractive leg or fixed supporting leg case are hinged; The cylinder barrel end of described secondary two-way cylinder and one-level Retractive leg or secondary Retractive leg are hinged, and its rod end and secondary Retractive leg or one-level Retractive leg are hinged; Described supporting leg extension and contraction control loop control pressure oil circuit is communicated with the rodless cavity or the rod chamber of one-level oil cylinder, and oil return circuit is communicated with the rod chamber or the rodless cavity of one-level oil cylinder, realizes stretching out or regaining of one-level Retractive leg; Described supporting leg extension and contraction control loop control pressure oil circuit is communicated with the rodless cavity or the rod chamber of two-level oil cylinder, and oil return circuit is communicated with the rod chamber or the rodless cavity of two-level oil cylinder, realizes stretching out or regaining of secondary Retractive leg.
Preferably, described supporting leg extension and contraction control loop comprises control cock, described one-level two-way cylinder and the parallel connection of secondary two-way cylinder, and described control cock is arranged between one-level oil cylinder and two-level oil cylinder and pressure oil circuit and the oil return circuit, and has three mode of operations; At first mode of operation, the pressure oil circuit is communicated with the rodless cavity of one-level oil cylinder and two-level oil cylinder, and oil return circuit is communicated with the rod chamber of one-level oil cylinder and two-level oil cylinder; At second mode of operation, the pressure oil circuit is communicated with the rod chamber of one-level oil cylinder and two-level oil cylinder, and oil return circuit is communicated with the rodless cavity of one-level oil cylinder and two-level oil cylinder; At the 3rd mode of operation, non-conduction between pressure oil circuit and oil return circuit and one-level oil cylinder and the two-level oil cylinder.
Described control cock is automatically controlled three position four-way directional control valve.
Preferably, described supporting leg extension and contraction control loop is the pressure sequence control loop, also comprises first one way sequence valve and second one way sequence valve; Wherein, described first one way sequence valve is arranged on the pipeline between described two-level oil cylinder rodless cavity and the control cock; Described second one way sequence valve is arranged on the pipeline between described one-level cylinder rod chamber and the control cock.
Preferably, described first one way sequence valve and second one way sequence valve are fixedly installed on the upper side wall of described one-level Retractive leg, and described control cock is fixedly installed on the lower wall of fixed supporting leg case; Adopt first flexible pipe to be connected between described first unidirectional sequence control cock and one-level oil cylinder rodless cavity and the described control cock, employing second flexible pipe is connected between the described second unidirectional sequence control cock and two-level oil cylinder's rod chamber and the described control cock.
Preferably, also comprise the flexible pipe support component of captiveing joint with the fixed supporting leg case, described flexible pipe support component places in the telescopic outrigger, and along the flexible direction of supporting leg, the upper surface of described flexible pipe support component has the guide groove of ccontaining described first flexible pipe and second flexible pipe.
The utility model adopts two single-stage two-way cylinders, and the stretching out or regains of the flexible realization two-stage telescopic outrigger by two oil cylinders is with the support of acquisition than large span.Wherein, the two ends of an oil cylinder are hinged with fixed supporting leg case and one-level Retractive leg respectively, control the stretching out or regain of flexible realization one-level Retractive leg of this oil cylinder; The two ends of another oil cylinder are hinged with one-level Retractive leg and secondary Retractive leg respectively, control the stretching out or regain of flexible realization secondary Retractive leg of this oil cylinder.
The telescopic outrigger that the utility model provides compared with prior art, multi-stage oil cylinder is a multi-layer sleeve structure, this structural requirement parts at different levels and other framing members have higher processing precision, processing technology is comparatively complicated; And in this programme, the single-stage oil cylinder only has a pair of parts that cooperate requirement that have, working accuracy to be easy to realize, processing technology is simple; In addition, the cylinder bar of one-level oil cylinder and cylinder barrel are hinged with fixed supporting leg case and one-level Retractive leg respectively, the cylinder bar of two-level oil cylinder and cylinder barrel are hinged with secondary Retractive leg and one-level Retractive leg respectively, hinged of whole telescoping mechanism needs to adopt bearing pin to realize, therefore, the utlity model has simple in structurely, be easy to the characteristics of installing, safeguarding.
In the utility model preferred version, control loop adopts the pressure sequence control loop, realize that by two one way sequence valves two-stage supporting leg automatic sequence is flexible, the sequence of operation of supporting legs at different levels is solidified, that is to say, have only the one-level telescopic outrigger to stretch out and put in place, the secondary telescopic outrigger just can be finished and stretch out, have only the secondary telescopic outrigger to regain, the one-level telescopic outrigger just can be finished withdrawal, and then the action of guaranteeing to stretch one's legs is more reliable.
In another preferred version of the present utility model, adopt flexible pipe to be connected between control oil channel and the oil cylinder, so that set up Reliable Circuit to the oil cylinder that mode of operation moves, and on the fixed supporting leg case, being set with the flexible pipe support component, the upper surface of described flexible pipe support component offers the guide groove of ccontaining flexible pipe.In working order, when the one-level telescopic outrigger stretched out, the movable end of described flexible pipe stretched out with the one-level Retractive leg, placed in the guide groove; When the one-level telescopic outrigger was regained, the movable end of described flexible pipe was regained with the one-level Retractive leg, and the movable end flexible pipe is deviate from from guide groove.In one-level telescopic outrigger telescopic process, there is not direct contact between flexible pipe and the one-level Retractive leg, effectively avoid flexible pipe generation wearing and tearing and cause oil leakage phenomenon to take place.
The telescopic outrigger assembly that the utility model provides comprises vertical telescopic oil cylinder, hose reel, flexible pipe and foregoing telescopic outrigger; Described vertical telescopic oil cylinder is arranged on described telescopic outrigger below, captives joint with the external part of the secondary Retractive leg of described telescopic outrigger in its upper end; Described hose reel is fixedly installed on the fixed supporting leg case of described telescopic outrigger; Described hose reeling is arranged on the described hose reel, is used for being communicated with between vertical telescopic oil cylinder and the control oil channel, realizes stretching out or regaining of vertical telescopic oil cylinder.
The concrete pump truck that the utility model provides comprises four telescopic outrigger assemblies, and described telescopic outrigger assembly as previously mentioned.
The telescopic outrigger that the utility model provides also is applicable to Other Engineering machinery, such as: wheel crane.
Description of drawings
Fig. 1 is the structural representation of the telescopic leg of existing multi-stage oil cylinder control;
Fig. 2 is the integral structure scheme drawing of concrete pump truck described in the utility model;
Fig. 3 is the structural representation of telescopic outrigger assembly described in the utility model;
Fig. 4 is the structural representation that described telescopic outrigger assembly is in the state of stretching out;
Fig. 5 is the structural representation of telescopic outrigger described in the utility model;
Fig. 6 is the fluid control schematic diagram of telescopic outrigger described in the utility model;
Fig. 7 is the I portion back view of Fig. 3;
Fig. 8 is the view of stretching out of telescopic outrigger assembly described in the utility model.
Among Fig. 1-Fig. 8: fixed supporting leg case 1, one-level Retractive leg 2, secondary Retractive leg 3, one-level two-way cylinder 4, secondary two-way cylinder 5, control cock 6, first one way sequence valve 7, second one way sequence valve 8, first flexible pipe 9, second flexible pipe 10, flexible pipe support component 11, guide groove 111, vertical telescopic oil cylinder 12, hose reel 13, flexible pipe 14, telescopic outrigger 15.
The specific embodiment
Specify present embodiment below in conjunction with Figure of description.
Design philosophy of the present utility model is, adopts two single-stage two-way cylinders to finish stretching out of two-stage Retractive leg or recovery operation, and dependency structure simplicity of design, operation reliably are easy to install, safeguard.Telescopic outrigger described in the utility model is suitable to can be used for industrial wheeled equipment, is that example specifies based on concrete pump truck below.See also Fig. 2, this figure is the integral structure scheme drawing of described concrete pump truck.
Present embodiment provides a kind of concrete pump truck, and it mainly comprises hopper, pumparound, hydraulic efficiency pressure system, washing system, electric system, motor, walking chassis and four telescopic outrigger assemblies.Special version be, inventive point of the present utility model is the improvement design of telescopic outrigger assembly 30, wherein, hopper in the concrete pump truck, pumparound, hydraulic efficiency pressure system, washing system, electric system, motor and walking chassis are same as the prior art, so, above-mentioned each parts are not done further explanation in the present embodiment.For describing the structure of telescopic outrigger assembly in detail, see also Fig. 3, this figure is the structural representation of telescopic outrigger assembly described in the utility model.
As shown in Figure 3, described telescopic outrigger assembly 30 is in retracted state, and it comprises vertical telescopic oil cylinder 12, hose reel 13, flexible pipe 14 and telescopic outrigger 15; Described vertical telescopic oil cylinder 12 is arranged on described telescopic outrigger 15 belows, captives joint with the external part of the secondary Retractive leg 3 of described telescopic outrigger 15 in its upper end; Described hose reel 13 is fixedly installed on the lower surface of fixed supporting leg case 1 of described telescopic outrigger 15; Described flexible pipe 14 is reeled and is arranged on the described hose reel 13, is used for being communicated with between vertical telescopic oil cylinder 12 and the control oil channel, realizes stretching out or regaining of vertical telescopic oil cylinder 12.Please in the lump referring to Fig. 4, this figure is the structural representation that described telescopic outrigger assembly 30 is in the state of stretching out.Need to prove that the structure of the described vertical telescopic oil cylinder 12 of present embodiment, hose reel 13 and flexible pipe 14 and each other annexation are same as the prior art, do not give unnecessary details so give at this.
Please in the lump referring to Fig. 4 and Fig. 5, wherein, Fig. 5 is the structural representation of telescopic outrigger 15 described in the utility model.
As shown in the figure, the telescopic outrigger 15 that this enforcement provided mainly is made up of fixed supporting leg case 1, one-level Retractive leg 2, secondary Retractive leg 3, one-level two-way cylinder 4, secondary two-way cylinder 5 and supporting leg extension and contraction control loop (not shown).
Described secondary Retractive leg 3, one-level Retractive leg 2 and the 1 inside and outside nested setting of fixed supporting leg case, wherein, but described secondary Retractive leg 3 places in the one-level Retractive leg 2 and relative motion, but described one-level Retractive leg 2 places in the fixed supporting leg case 1 and relative motion, Figure 1 shows that the state that stretches out of telescopic outrigger.Need to prove that the agent structure of described fixed supporting leg case 1, one-level Retractive leg 2 and secondary Retractive leg 3 and assembling annexation are not the inventive point places of this patent, do not give unnecessary details so give.
Shown in Fig. 5, the assembly relation of described one-level two-way cylinder 4 (be called for short one-level oil cylinder) is: cylinder barrel end and one-level Retractive leg are 2 hinged, rod end and fixed supporting leg case 1 are hinged; The assembly relation of described secondary two-way cylinder 5 is: rod end and secondary Retractive leg are 3 hinged, cylinder barrel end and one-level Retractive leg 2 are hinged.
The assembly relation of described one-level two-way cylinder 4 and secondary double-acting cylinder 5 is not limited to the confined state shown in Fig. 5.In fact also can be such design, the rod end of described one-level two-way cylinder 4 (be called for short two-level oil cylinder) and one-level Retractive leg be 2 hinged, cylinder barrel end and fixed supporting leg case 1 are hinged; The cylinder barrel end of described secondary two-way cylinder 5 and secondary Retractive leg are 3 hinged, rod end and one-level Retractive leg 2 are hinged; When oil cylinder stretched, the supporting leg expanding-contracting action in this kind assembly relation and the aforementioned assembly relation was identical.
Described supporting leg extension and contraction control loop is used for control presssure oil circuit P and is communicated with the rodless cavity or the rod chamber of one-level oil cylinder 4, and oil return circuit T is communicated with the rod chamber or the rodless cavity of one-level oil cylinder 4, realizes stretching out or regaining of one-level Retractive leg 2; Described supporting leg extension and contraction control loop control pressure oil circuit P is communicated with the rodless cavity or the rod chamber of two-level oil cylinder 5, and oil return circuit T is communicated with the rod chamber or the rodless cavity of two-level oil cylinder 5, realizes stretching out or regaining of secondary Retractive leg 3.
Than existing multi-stage oil cylinder telescopic outrigger, the structural requirement of multi-layer sleeve structure parts at different levels and other framing members all have higher processing precision, and processing technology is comparatively complicated; And in this programme, the single-stage oil cylinder only has a pair of parts that cooperate requirement that have, working accuracy to be easy to guarantee; In addition, mounting structure is simple between each parts of the utility model, uses hinging pin shaft just can realize the failure-free relation of being articulated and connected, and is easy to install, safeguard.
Particularly, see also Fig. 6, this figure is the fluid control schematic diagram of telescopic outrigger described in the utility model; Described one-level two- way cylinder 4 and 5 parallel connections of secondary two-way cylinder, that is to say that the rod chamber and the rodless cavity of one-level two-way cylinder 4 and secondary two-way cylinder 5 are communicated with respectively, therefore, utilize a control cock can realize stretching out of two-stage oil cylinder or regain, thus simplified control system.
As shown in Figure 6, described supporting leg extension and contraction control loop comprises the control cock 6 that is arranged between one-level oil cylinder 4 and two-level oil cylinder 5 and pressure oil circuit P and the oil return circuit T, described control cock 6 can be manual three position four-way directional control valve or automatically controlled three position four-way directional control valve, certainly, select for use automatically controlled three position four-way directional control valve to realize the failure-free Long-distance Control, so be preferred plan.
As shown in Figure 6, described control cock 6 has three mode of operations; At first mode of operation, pressure oil circuit P is communicated with the rodless cavity of one-level oil cylinder 4 and two-level oil cylinder 5, oil return circuit T is communicated with the rod chamber of one-level oil cylinder 4 and two-level oil cylinder 5, at this moment, the loop is inserted in the position, a left side of described control cock 6, pressure oil enters oil cylinder rodless cavity, and the fluid in the rod chamber flows back to fuel tank, and telescopic outrigger stretches out; At second mode of operation, pressure oil circuit P is communicated with the rod chamber of one-level oil cylinder 4 and two-level oil cylinder 5, oil return circuit T is communicated with the rodless cavity of one-level oil cylinder 4 and two-level oil cylinder 5, at this moment, the loop is inserted in the right position of described change-over valve 6, pressure oil enters cylinder rod chamber, and the fluid of oil cylinder rodless cavity flows back to fuel tank, and telescopic outrigger is regained; At the 3rd mode of operation, non-conduction between pressure oil circuit and oil return circuit and one-level oil cylinder and the two-level oil cylinder, at this moment, telescopic outrigger is in off working state.
As shown in Figure 6, described supporting leg extension and contraction control loop also comprises first one way sequence valve 7 and second one way sequence valve 8, be that described supporting leg extension and contraction control loop is the pressure sequence control loop, utilize the variation of pressure in the loop can realize that the two-stage Retractive leg is finished in order and stretch out or regain action; Wherein, described first one way sequence valve 7 is arranged on the pipeline between described two-level oil cylinder 5 rodless cavities and the control cock 6; Described second one way sequence valve 8 is arranged on the pipeline between described one-level oil cylinder 4 rod chambers and the control cock 6.
In the working process, the described automatically controlled 3-position 4-way control cock of Long-distance Control realizes the sequentially-operating of described one-level oil cylinder 4 and two-level oil cylinder 5.
When described control cock 6 is in first mode of operation, Access Control loop, promptly left position: because the back pressure effect of first one way sequence valve 7, pressure oil is introduced into the rodless cavity of one-level oil cylinder 4, when the piston rod of one-level oil cylinder extend out to end position, be that one-level Retractive leg 2 is when stretching out fully, circuit pressure just can be increased to the settling pressure of first one way sequence valve 7, first one way sequence valve 7 is opened, pressure oil enters the rodless cavity of two-level oil cylinder 5, two-level oil cylinder's 5 piston rods stretch out, and stretch out thereby promote secondary Retractive leg 3; That is, the sequence of operation of stretching out in the process is: one-level Retractive leg 2 → secondary Retractive leg 3.
In like manner, when described control cock 6 is in second mode of operation, Access Control loop, promptly right position: because the back pressure effect of second one way sequence valve 7, pressure oil is introduced into the rod chamber of two-level oil cylinder 5, when the piston rod of two-level oil cylinder 5 is retracted to end position, when promptly secondary Retractive leg 3 is regained fully, when circuit pressure just can be increased to the settling pressure of second one way sequence valve 8, second one way sequence valve 8 is opened, and pressure oil enters one-level oil cylinder 2 rod chambers, and the piston rod of one-level oil cylinder 2 is regained; That is the sequence of operation in the withdrawal process, is: secondary Retractive leg 3 → one-level Retractive leg 2.
Can draw in conjunction with above-mentioned working process: adopt a control cock can finish stretching out of two-stage supporting leg and recovery operation, and the sequence of motion of two-stage supporting leg is able to effective curing by the pressure distribution of hydraulic efficiency pressure system, avoided taking place because of the problem of the different favorable sequence of motion disorders of resistance of motion, operation is simple and reliable.
Concrete rigging position about described first one way sequence valve 7 and second one way sequence valve 8 sees also Fig. 3 and Fig. 7, and wherein, Fig. 7 is the I portion back view of Fig. 3.
As shown in the figure, described first one way sequence valve 7 and second one way sequence valve 8 are fixedly installed on the upper side wall of described one-level Retractive leg 2, and described control cock 6 (not shown)s are fixedly installed on the fixed supporting leg case 1; Adopt first flexible pipe 9 to be connected (a port of first flexible pipe 9 is connected with the A mouth of control cock 6) between described first unidirectional sequence control cock 7 and one-level oil cylinder 4 rodless cavities and the described control cock 6, employing second flexible pipe 10 is connected (the b port of second flexible pipe 10 is connected with the B mouth of control cock 6) between the described second unidirectional sequence control cock 8 and two-level oil cylinder's 5 rod chambers and the described control cock 6.This design, utilized hydraulic hose can adapt to the characteristics of length variations, when one-level Retractive leg 2 is regained, described first flexible pipe 9 and second flexible pipe 10 are circuitous case of bending, when one-level Retractive leg 2 stretches out, the circuitous curve of described first flexible pipe 9 and second flexible pipe 10 is opened, to adapt to two elongated hydraulic fluid port positions of relative distance.The length of described first flexible pipe 9 and second flexible pipe 10 needs according to concrete assembly relation setting, be understandable that, the long meeting of the length of two flexible pipes exists loss of pressure, the insecure problem of cylinder action sensitivity, so above-mentioned two hose lengths can satisfy the use needs that one-level Retractive leg 2 stretches out, regains end position and get final product.
In addition, for fear of at described one-level Retractive leg 2 in telescopic process, contact and produce friction between first flexible pipe 9 and second flexible pipe 10 and one-level Retractive leg 2 inwalls, present embodiment also comprises the flexible pipe support component 11 of captiveing joint with fixed supporting leg case 1, please in the lump referring to Fig. 3 and Fig. 8, wherein, Fig. 8 is the view of stretching out of described telescopic outrigger assembly.As shown in the figure, described flexible pipe support component 11 places in the telescopic outrigger; And along the flexible direction of supporting leg, the upper surface of described flexible pipe support component 11 has the guide groove 111 of ccontaining described first flexible pipe 9 and second flexible pipe 10.The coupling end of described flexible pipe and control cock 6 is a fixed end, the coupling end of itself and first one way sequence valve 7 and second one way sequence valve 8 is a movable end, described first flexible pipe 9 and second flexible pipe 10 of nearly fixed end place in the described guide groove 111, and described first flexible pipe 9 of nearly movable end and second flexible pipe 10 will stretching out or regains and to embed described guide groove 111 interior or deviate from described guide groove 111 along with one-level Retractive leg 2.Because in one-level Retractive leg 2 motion processes, no touch friction between the tube wall of above-mentioned flexible pipe and described one-level Retractive leg 2 inwalls is effectively avoided flexible pipe generation wearing and tearing and is caused oil leakage phenomenon to take place.Present embodiment by the reasonable Arrangement Hose Transportation System, and then the frequency of the maintaining of the flexible pipe that reduces, is guaranteed system's reliable operation in limited supporting leg space.
Special version be, structure for clear expression miscellaneous part, the concrete structure of not shown fixed supporting leg case 3 among Fig. 3 and Fig. 8, but in Fig. 3 and Fig. 8, adopt the simple and easy technique of painting of fixed constraint to represent annexation between miscellaneous part and the described fixed supporting leg case 3.
To sum up, the utility model adopts two single-stage two-way cylinders, and stretching out or regaining of the flexible realization two-stage telescopic outrigger by two oil cylinders is simple and reliable for structure to obtain the support than large span, is easy to processing, assembling and keeps in repair; By the distribution of hydraulic system pressure, realized that two-stage movable supporting legs automatic sequence is flexible, convenient and reliable operation.Be appreciated that the utility model structural principle is applicable to the multi-stage expansion supporting leg that two-stage is above.
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, a kind of telescopic outrigger, secondary Retractive leg, one-level Retractive leg and the fixed supporting leg case of nested setting is characterized in that inside and outside comprising, also comprise:
The one-level two-way cylinder, its rod end and fixed supporting leg case or one-level Retractive leg are hinged, and its cylinder barrel end and one-level Retractive leg or fixed supporting leg case are hinged;
The secondary two-way cylinder, its cylinder barrel end and one-level Retractive leg or secondary Retractive leg are hinged, and its rod end and secondary Retractive leg or one-level Retractive leg are hinged; With
Supporting leg extension and contraction control loop, the control presssure oil circuit is communicated with the rodless cavity or the rod chamber of one-level oil cylinder, and oil return circuit is communicated with the rod chamber or the rodless cavity of one-level oil cylinder, realizes stretching out or regaining of one-level Retractive leg; The control presssure oil circuit is communicated with the rodless cavity or the rod chamber of two-level oil cylinder, and oil return circuit is communicated with the rod chamber or the rodless cavity of two-level oil cylinder, realizes stretching out or regaining of secondary Retractive leg.
2, telescopic outrigger according to claim 1 is characterized in that, described one-level two-way cylinder and the parallel connection of secondary two-way cylinder, and described supporting leg extension and contraction control loop comprises:
Control cock is arranged between one-level oil cylinder and two-level oil cylinder and pressure oil circuit and the oil return circuit, and has three mode of operations; At first mode of operation, the pressure oil circuit is communicated with the rodless cavity of one-level oil cylinder and two-level oil cylinder, and oil return circuit is communicated with the rod chamber of one-level oil cylinder and two-level oil cylinder; At second mode of operation, the pressure oil circuit is communicated with the rod chamber of one-level oil cylinder and two-level oil cylinder, and oil return circuit is communicated with the rodless cavity of one-level oil cylinder and two-level oil cylinder; At the 3rd mode of operation, non-conduction between pressure oil circuit and oil return circuit and one-level oil cylinder and the two-level oil cylinder.
3, telescopic outrigger according to claim 2 is characterized in that, described control cock is automatically controlled three position four-way directional control valve.
4, telescopic outrigger according to claim 3 is characterized in that, described supporting leg extension and contraction control loop is the pressure sequence control loop, also comprises:
First one way sequence valve is arranged on the pipeline between described two-level oil cylinder rodless cavity and the control cock;
Second one way sequence valve is arranged on the pipeline between described one-level cylinder rod chamber and the control cock.
5, telescopic outrigger according to claim 4 is characterized in that, described first one way sequence valve and second one way sequence valve are fixedly installed on the upper side wall of described one-level Retractive leg, and described control cock is fixedly installed on the lower wall of fixed supporting leg case; Adopt first flexible pipe to be connected between described first unidirectional sequence control cock and one-level oil cylinder rodless cavity and the described control cock, employing second flexible pipe is connected between the described second unidirectional sequence control cock and two-level oil cylinder's rod chamber and the described control cock.
6, telescopic outrigger according to claim 5, it is characterized in that, also comprise the flexible pipe support component of captiveing joint with the fixed supporting leg case, described flexible pipe support component places in the telescopic outrigger, and along the flexible direction of supporting leg, the upper surface of described flexible pipe support component has the guide groove of ccontaining described first flexible pipe and second flexible pipe.
7, the telescopic outrigger assembly is characterized in that, comprising:
Telescopic outrigger described in arbitrary claim in the claim 1 to 6;
Vertical telescopic oil cylinder is arranged on described telescopic outrigger below, captives joint with the external part of the secondary Retractive leg of described telescopic outrigger in its upper end;
Hose reel is fixedly installed on the fixed supporting leg case of described telescopic outrigger; With
Flexible pipe, reeling is arranged on the described hose reel, is used for being communicated with between vertical telescopic oil cylinder and the control oil channel, realizes stretching out or regaining of vertical telescopic oil cylinder.
8, concrete pump truck comprises four telescopic outrigger assemblies, it is characterized in that, described telescopic outrigger assembly adopts the described telescopic outrigger assembly of claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008201310429U CN201254166Y (en) | 2008-08-11 | 2008-08-11 | Expansion outrigger and expansion outrigger assembly and concrete pump truck with the same |
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| CNU2008201310429U CN201254166Y (en) | 2008-08-11 | 2008-08-11 | Expansion outrigger and expansion outrigger assembly and concrete pump truck with the same |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359109A (en) * | 2011-08-08 | 2012-02-22 | 长沙天为工程机械制造有限公司 | Static pile press for narrow site and ultra-short side pile distance construction |
| CN101698407B (en) * | 2009-11-18 | 2012-05-23 | 三一汽车制造有限公司 | Movable type engineering machine and support leg device thereof |
| CN117208791A (en) * | 2023-09-25 | 2023-12-12 | 河南骏通车辆有限公司 | Double-support leg structure and automobile crane |
-
2008
- 2008-08-11 CN CNU2008201310429U patent/CN201254166Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101698407B (en) * | 2009-11-18 | 2012-05-23 | 三一汽车制造有限公司 | Movable type engineering machine and support leg device thereof |
| CN102359109A (en) * | 2011-08-08 | 2012-02-22 | 长沙天为工程机械制造有限公司 | Static pile press for narrow site and ultra-short side pile distance construction |
| CN117208791A (en) * | 2023-09-25 | 2023-12-12 | 河南骏通车辆有限公司 | Double-support leg structure and automobile crane |
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