Support system and have the construction machinery and equipment of this support system
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of support system.The invention still further relates to a kind of construction machinery and equipment with above-mentioned support system.
Background technology
Construction machinery and equipment has support system usually, in order to functions such as support car load, car load go.With the concrete pump truck is example, and its support system generally comprises and is positioned at fixedly four supporting legs of capstan head, and during operation, two supporting legs stretch out forward, and two supporting legs stretch out backward in addition.
Please refer to Fig. 1, Fig. 1 is the distribution schematic diagram of concrete pump truck supporting leg in the prior art, also shown is polygon and car body stability relationship that supporting leg strong point line forms.
The support system of concrete pump truck is provided with first front leg strut 11 and second front leg strut 12; And first rear support leg 13 and second rear support leg 14; The expansion form of the outrigger arm of supporting leg and start point, length all can be adjusted; To keep the stability of car load, require supporting leg to have reasonable structure form, enough structural mechanical property and effective support scope in the design of concrete pump truck, to guarantee its load-carrying capacity and whole vehicle stability.
When need supporting, four outrigger arms elongations, reach Len req after, oil cylinder stretches out, and is supported in ground.The expansion form of four outrigger arms generally has: two front leg strut X types, two rear support leg oscillating-types; Two front leg strut X types, two rear support leg H types; Two rear support leg X types, the swing of two front leg struts; Two front leg strut V-types, two rear support leg oscillating-types etc.Two front leg strut V-types shown in Figure 1 can be stretched, and two rear support legs can be swung, and move to suitable position support thereby drive supporting leg, satisfy stability requirement.
In the prior art; Concrete pump truck is generally 4 supports (four supporting leg), according to mechanics principle, during operation; Must guarantee that car load center of gravity circle falls within four formed quadrangle bearing surfaces of supporting leg strong point line (the quadrangle bearing surface is a safety zone); Can effectively prevent tumbling of car body, for this reason, each limit of quadrangle and the minor increment in round week of center of gravity all should be greater than zero.Among Fig. 1, each limit of quadrangle and the minor increment R1T1 in round week of center of gravity, R2T2, R3T3, R4T4 all should be greater than zero, and when the null state of above-mentioned minor increment is critical conditions stable and that tumble, and this shortest distance more parameters is big, and its stability of strutting system is good more.But there is following technical matters in the concrete pump truck of this structure: usually; The jib of concrete pump truck is long more; Its cooresponding chassis is also longer, and the corresponding center of gravity area of a circle increases, for guaranteeing whole vehicle stability; Then outrigger arm must be longer, could guarantee that the adjacent supports point links to the round all shortest distances of center of gravity and remains within the predetermined safe scope.Yet, when the supporting leg extension elongation is long, need take the larger area place, under the condition of limited of space, place, pump truck is not easy to operation; In addition, long outrigger arm must cause the increase of productive costs, and intensity and resistance to bending in order to guarantee long outrigger arm, needs to strengthen the outrigger arm cross-sectional area, thereby has further increased complete vehicle weight and productive costs.
In addition, supporting leg generally is located at the head on chassis, and promptly front leg strut and rear support leg all concentrate on the head on chassis.Because when outrigger arm stretches out; By gravity; Certainly exist and upwarp phenomenon (having the gap between the outer arm of telescopic boom and the inner arm), if chassis length is longer, under the deadweight effect of chassis; The supporting leg that is positioned at the chassis head is difficult to guarantee that the chassis afterbody is effectively propped up, thereby is difficult to guarantee the terrain clearance on chassis.
In view of this, how improving the leg structure of support system, make it more stably support car load, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of the invention can more stably support car load for a kind of support system is provided.Another object of the present invention provides a kind of construction machinery and equipment with above-mentioned support system.
For reaching first purpose of the present invention; The present invention provides a kind of support system of construction machinery and equipment; Comprise first supporting leg, second supporting leg, the 3rd supporting leg and the 4th supporting leg of being located at said construction machinery and equipment, it is characterized in that, between the 3rd supporting leg, the 4th supporting leg, additional supporting leg is set; The minor increment that links to said round week of construction machinery and equipment center of gravity of the strong point of the 3rd supporting leg, the 4th supporting leg is less than the minor increment that links to said round week of construction machinery and equipment center of gravity of the adjacent two supporting leg strong points in the 3rd supporting leg, the 4th supporting leg, the additional supporting leg.
Preferably, said first supporting leg, second supporting leg are located at the front portion of said construction machinery and equipment, and said the 3rd supporting leg, the 4th supporting leg are located at the rear portion of said construction machinery and equipment.
Preferably, the number of said additional supporting leg is two.
Preferably; Said construction machinery and equipment comprises chassis and the fixedly capstan head of being located at the chassis head; Said first supporting leg, said second supporting leg are located at fixedly capstan head near headstock one side; The 3rd supporting leg, the 4th supporting leg are located at fixedly on the capstan head near the tailstock one side, and two said additional supporting legs are located at the afterbody on the chassis of said construction machinery and equipment.
Preferably, two said additional supporting legs are the support cylinder of being located at the chassis afterbody.
Preferably, said support system comprises the crossbeam that is connected the chassis afterbody, and crossbeam extends along the Width of construction machinery and equipment, and two said additional supporting legs are connected to the two ends of said crossbeam.
Preferably, said support system comprises the crossbeam that is connected the chassis afterbody, and crossbeam extends along the Width of construction machinery and equipment, and said crossbeam is a box type construction; Two said additional supporting legs comprise outrigger arm and the supporting leg of being located at the outrigger arm end; The outrigger arm of two said additional supporting legs all is nested in the said crossbeam, and the outrigger arm of two said additional supporting legs is flexible in opposite directions in said crossbeam.
Preferably, the flexible axis of the outrigger arm of two said additional supporting legs interlaces out.
Be provided with additional supporting leg between the 3rd supporting leg, the 4th supporting leg in the support system among the present invention; Under the prerequisite that guarantees load-carrying capacity and stability, the length of each supporting leg can be utilized effectively, and compared to prior art; Because the setting of additional supporting leg; In the 3rd supporting leg, the 4th supporting leg, the additional supporting leg, the ultimate range that the adjacent two supporting leg strong points link to round week of center of gravity increases, so improved the anti-tipping ability and the supporting capacity of car load.On the other hand; At construction machinery and equipment the 3rd supporting leg, when the 4th leg length reduces; Need not to take the larger area place, also can keep the stability identical, thereby make the construction machinery and equipment can operation in limited space with this support system with prior art; Satisfy the construction demand in narrow and small place, make the field of application of construction machinery and equipment more extensive.
For reaching another object of the present invention, the present invention also provides a kind of construction machinery and equipment, has chassis and support system, and said support system is above-mentioned each described support system.
Because above-mentioned support system has above-mentioned technique effect, the construction machinery and equipment with this support system has constructed effect.
Preferably, said construction machinery and equipment is concrete pump, hoisting crane.
Description of drawings
Fig. 1 is the distribution schematic diagram of concrete pump truck supporting leg in the prior art, also shown is supporting leg strong point line and car body stability relationship;
Fig. 2 is the structure diagram that support system provided by the present invention is applied to first kind of specific embodiment in the construction machinery and equipment, and this figure is the visual angle with the head on chassis;
Fig. 3 is for being the structural representation at visual angle with the chassis afterbody among Fig. 2;
Fig. 4 is the birds-eye view of Fig. 2;
Fig. 5 is the mechanical analysis schematic diagram of Fig. 2;
Fig. 6 is a stressed mechanical analysis schematic diagram behind the 3rd supporting leg among Fig. 2, the 4th supporting leg contraction in length;
Fig. 7 is the structure diagram that support system provided by the present invention is applied to second kind of specific embodiment in the construction machinery and equipment, and this figure is the visual angle with the head on chassis;
Fig. 8 is for being the structural representation at visual angle with the chassis afterbody among Fig. 7;
Fig. 9 is the birds-eye view of Fig. 7;
Figure 10 is the mechanical analysis schematic diagram of Fig. 7;
Figure 11 is the structure diagram that support system provided by the present invention is applied to the third specific embodiment in the construction machinery and equipment, and this figure is the visual angle with the head on chassis;
Figure 12 is for being the structural representation at visual angle with the chassis afterbody among Figure 11;
Figure 13 is the birds-eye view of Figure 11;
Figure 14 is applied to the structure diagram of the 4th kind of specific embodiment in the construction machinery and equipment for support system provided by the present invention.
The specific embodiment
Core of the present invention can more stably support car load for a kind of support system is provided.Another core of the present invention provides a kind of construction machinery and equipment with above-mentioned support system.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 2 to Fig. 4, Fig. 2 is the structure diagram that support system provided by the present invention is applied to first kind of specific embodiment in the construction machinery and equipment, and this figure is the visual angle with the head on chassis; Fig. 3 is for being the structural representation at visual angle with the chassis afterbody among Fig. 2; Fig. 4 is the birds-eye view of Fig. 2.
The present invention provides supporting leg in the construction machinery and equipment support system to comprise to be located at anterior first supporting leg 21, second supporting leg 22; Be located at the 3rd supporting leg 23 and the 4th supporting leg 24 at rear portion; In order more stably to support; First supporting leg 21 and second supporting leg 22 are distributed in both sides, 2 axis, chassis, and the 3rd supporting leg 23 and the 4th supporting leg 24 are distributed in both sides, 2 axis, chassis; Four supporting legs include outrigger arm, and are provided with support cylinder in the end of outrigger arm; In addition; Two additional supporting legs also are set at the construction machinery and equipment rear portion; The first additional supporting leg 25 as shown in Figure 2 and the second additional supporting leg 26, and the first additional supporting leg 25 and second adds supporting leg 26 and is distributed in both sides, 2 axis, chassis, and promptly braced system altogether is provided with six supporting legs.
Please combine Fig. 5 further to understand, Fig. 5 is the mechanical analysis schematic diagram of Fig. 2.
Also comprise two additional supporting legs owing to be arranged on the supporting leg at construction machinery and equipment rear portion; Support system is 6 supports; Six supporting leg strong points line successively form the hexagon bearing surface, and the strong point of the additional supporting leg of the 3rd supporting leg 23, the 4th supporting leg 24, first 25, the second additional supporting leg 26 is followed successively by A, D, C, B.Compared to 4 supports of the prior art; Under the situation of two front leg struts and rear portion, chassis two rear support leg length and invariant position; The 3rd supporting leg 23 and the 4th supporting leg 24 strong points link to the minor increment in round week of construction machinery and equipment center of gravity; Link to the minor increment in round week of center of gravity less than the adjacent two supporting leg strong points in each supporting leg of construction machinery and equipment rear portion, i.e. O2M<O2N, O2M<O1P, O2M<O3Q are compared to prior art (O2M is equivalent to the R3T3 among Fig. 1); The adjacent supports point that has strengthened the supporting leg of rear vehicle links to the shortest distance in round week of center of gravity, and stability is improved.Comparison diagram 1 and Fig. 5 can find out that hexagon has more the area (area of quadrangle ABCD) of dash area S1 than quadrangle.Therefore,, under the prerequisite that does not increase a leg length, regulate the supporting leg position even after the car load center of gravity area of a circle increases, still can be so that the center of gravity circle falls within this hexagon bearing surface.Then the present technique scheme can improve the anti-tipping ability of car load.
Analyze from another point of view, if guarantee that whole vehicle stability is constant, with respect to 4 supports of prior art; During 6 supports; The length of outrigger arm can shorten, and please refer to Fig. 6, and Fig. 6 is that the 3rd supporting leg 23 among Fig. 2, the 4th supporting leg 24 shorten the stressed mechanical analysis schematic diagram in back.
Can know that with reference to Fig. 6 and Fig. 1 the 3rd supporting leg 23 of Fig. 6 and the 4th supporting leg 24 shorten certain-length, the shortest distance that also can guarantee the round thoughtful strong point line of center of gravity is greater than zero; Thereby reduce production costs, (outrigger arm is long, and its moment of flexure of bearing is bigger to guarantee intensity and the stability of each outrigger arm; Upwarping phenomenon also aggravates); And the shortening of outrigger arm has also reduced complete vehicle weight simultaneously, can also reduce oil consumption.When arranging supporting leg; Can make the span difference between each supporting leg as far as possible little, the distance between first supporting leg 21 shown in Fig. 6 and second supporting leg 22 is that the distance between d1, the 3rd supporting leg 23 and first supporting leg 21 is that the distance that d2, chassis 2 afterbodys first add supporting leg 25 and the 4th supporting leg 24 is d3.Then; Because the length of the 3rd supporting leg 23, the 4th supporting leg 24 is shorter, during operation, need not to take the larger area place; Also can keep the stable of car load; Thereby make the construction machinery and equipment can operation in limited space, satisfy the construction demand in narrow and small place, make the field of application of construction machinery and equipment more extensive with this support system.
Further; First supporting leg 21, second supporting leg 22 all can be located at construction machinery and equipment fixedly on the capstan head near a side of headstock; The 3rd supporting leg 23, the 4th supporting leg 24 all are arranged at the side that fixing capstan head is close to the tailstock; In addition, the first additional supporting leg 25 and the second additional supporting leg 26 are located at the afterbody on chassis 2, like Fig. 2,3, shown in 4.Be provided with the construction machinery and equipment of center of gyration; Its center of gyration is located at the head on chassis 2 usually; The center of gravity of car load is partial to head, and the head that supporting leg is positioned at chassis 2 helps to improve the stability of car load, and the afterbody on chassis 2 also is provided with the first additional supporting leg 25 and adds supporting leg 24 with second among the present invention.Then will add supporting leg among Fig. 2 and be located at the stability of strutting system that the afterbody on chassis 2 helps to improve whole chassis 2, and avoid chassis 2 head supporting legs to upwarp the influence that chassis 2 afterbodys are supported, the terrain clearance of chassis whole when guaranteeing operation.
To the foregoing description, also an additional supporting leg can only be set, then support system is 5 supports, certainly, the number of additional supporting leg is preferably two, four, promptly is provided with in pairs, makes the symmetrical structure that is arranged as of rear vehicle supporting leg, make support more stable.Can expect that the number of supporting leg of being located at the rear portion is many more, under the certain situation of a leg length; The bearing surface area that each supporting leg forms is maximum; (or under identical steadiness, the length of each supporting leg can be short more), certainly; Because the restriction of complete vehicle weight is comparatively desirable scheme so two additional supporting legs are set.
Further; The first additional supporting leg 25 shown in Figure 2 and the second additional supporting leg 26 are for directly being arranged at two support cylinders of afterbody below, chassis; This kind supporting leg arrangement has made full use of the length on chassis 2 and four supporting legs of chassis 2 heads form the bigger polygon of area; And support cylinder directly is supported in the afterbody on chassis 2, need not to be provided with outrigger arm, compared to prior art, when improving stability, can also reduce production costs, and simultaneously, phenomenon also can not occur upwarping.Certainly; Also can be in the chassis 2 afterbody outrigger arm is set; The end of outrigger arm is provided with support cylinder, and promptly the structure with the 3rd supporting leg 23 of chassis head and the 4th supporting leg 24 is consistent, also can realize the object of the invention; But based on above-mentioned analysis, two additional supporting legs are located immediately at the scheme of chassis 2 afterbodys for comparatively optimizing.
Please refer to Fig. 7 to Figure 10, Fig. 7 is the structure diagram that support system provided by the present invention is applied to second kind of specific embodiment in the construction machinery and equipment, and this figure is the visual angle with the head on chassis; Fig. 8 is for being the structural representation at visual angle with the chassis afterbody among Fig. 7; Fig. 9 is the birds-eye view of Fig. 7; Figure 10 is the mechanical analysis schematic diagram of Fig. 7.
In this specific embodiment, the afterbody on chassis 2 is provided with the crossbeam 27 that extends along the width over sides of car body direction, the beam body that crossbeam 27 promptly is provided with perpendicular to chassis 2 axis, and two support cylinders lay respectively at the two ends of crossbeam 27.Compared to first kind of specific embodiment; Distance between the two additional supporting legs of these structural chassis 2 afterbodys is able to lengthening; Comparison diagram 6 can find out that with Figure 10 the hex area that 6 supports of this technical scheme form has more the area of dash area S2 compared to the technical scheme of Fig. 6; The shortest distance of the supporting leg strong point line at the round thoughtful rear portion of center of gravity is able to lengthening, thereby further improves whole vehicle stability.
Please refer to Figure 11 to Figure 13, Figure 11 is the structure diagram that support system provided by the present invention is applied to the third specific embodiment in the construction machinery and equipment, and this figure is the visual angle with the head on chassis; Figure 12 is for being the structural representation at visual angle with the chassis afterbody among Figure 11; Figure 13 is the birds-eye view of Figure 11.
This specific embodiment has been done further improvement to second kind of specific embodiment; Crossbeam 27 is a body structure; The first additional supporting leg 25 has first outrigger arm 281 and the hold-down arm that is positioned at first outrigger arm, 281 ends, and the second additional supporting leg 26 has second outrigger arm 282 and the hold-down arm that is positioned at second outrigger arm, 282 ends.First outrigger arm 281 and second outrigger arm 282 are nested in the crossbeam 27 and with respect to crossbeam 27 and stretch in opposite directions, and promptly two outrigger arms is flexible in the opposite direction.When arranging supporting leg; Two supporting legs of chassis 2 afterbodys (being support cylinder) are supported in ground after can stretching out certain distance with first outrigger arm 281 and second outrigger arm 282 again; Support the area of a polygon that forms with 6 of further increasings, when car load goes, can be with adding the supporting leg withdrawal.Can be known that by above-mentioned analysis the distance between 2 afterbodys, the two additional supporting legs of chassis is long more, the hex area of formation is big more, and the stability of car load is high more.Can obtain this beneficial effect through the method that adds long beam 27 length in second kind of specific embodiment, yet for satisfying the requirement of going, the length of crossbeam 27 can not exceed the width of car load, the distance of two additional supporting legs receives certain limitation.The outrigger arm of two additional supporting legs adopts the form of telescopic boom in this embodiment, can satisfy the requirement of raising stability of strutting system simultaneously and the width requirement when going.Further, the flexible axis of two outrigger arms can stagger, and then under the certain situation of crossbeam 27 length, the flexible amplitude of two outrigger arms is bigger.
To above-mentioned all embodiment, the expansion form of each supporting leg can variation.As shown in Figure 2, two front leg struts arrange that for the X type two rear support legs of chassis head (the 3rd supporting leg 23 and the 4th supporting leg 24) are hinged with chassis 2, for oscillating-type is arranged; Among Fig. 7, two rear support legs of two front leg struts and chassis head are the X type and arrange; Among Figure 11, two front leg struts arrange that for the X type two rear support legs of chassis head are that oscillating-type is arranged, two rear support legs are arranged for the H type; Can also be with reference to Figure 14, Figure 14 is the structure diagram that support system provided by the present invention is applied to the 4th kind of specific embodiment in the construction machinery and equipment, two front leg struts and two rear support legs all are oscillating-types among Figure 14.Can also make other combined deformation according to actual needs, all can realize the object of the invention.
Need to prove; First supporting leg 21 and second supporting leg 22 are located at the front portion in the foregoing description, and the 3rd supporting leg 23 and the 4th supporting leg 24 are located at the rear portion, and will add supporting leg and be located between the 3rd supporting leg 23 and the 4th supporting leg 24; In fact; Additional supporting leg also can be located between two front leg struts, or is located between front leg strut and the rear support leg, all can reach the object of the invention.
Except above-mentioned support system, the present invention also provides a kind of construction machinery and equipment, has support system and chassis, and said support system is the described support system of above-mentioned arbitrary embodiment.Because above-mentioned support system has above-mentioned technique effect, the construction machinery and equipment with this support system also has identical technique effect, does not give unnecessary details at this.Particularly, construction machinery and equipment can be concrete pump truck, hoisting crane etc.
More than a kind of support system provided by the present invention and the construction machinery and equipment with above-mentioned support system have all been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.