The double-duty tower machine of folding-jib lifting cloth
The utility model is that a kind of jib can be rolled over, and both can be used for lifting, can be used for the double-duty tower machine of the cloth of pump concrete again, belongs to the construction machine field.
Along with the progress of building construction technology, the shared proportion of pump concrete is increasing, but concrete cloth needs manpower to move cloth tube more, and both time-consuming, labor content is big again; Adopt the concrete placing boom cloth, but it can not lifting and climbs, so degree of utilization is not high.
The purpose of this utility model is at above-mentioned deficiency, adopts folding dolly jib, lifting and two kinds of functions of cloth can be combined, and when promptly lifting weight such as template, reinforcing bar, can work as the hoist tower machine and use; When cast concrete, can make concrete placing boom again and use.Lifting is turned back, and nimbly and freely, thereby has improved usage ratio of equipment greatly, and manpower and investment are saved in the convenient construction operation.
The utility model adopts following proposal to realize:
The dolly jib is formed by the hinged of lower boom by four jib joints;
On first and second jibs joint, pull bar is housed respectively, between is equipped with strut, has reached the plate winch by assembly pulley, can control upwarping angle or keeping level attitude of second jib joint, the insurance arm-tie also is equipped with in the assembly pulley both sides, and the insurance arm-tie is made up of two batten chains.
Be equipped with between second and second jib joint and unfold mechanism and arm-tie, arm-tie can bear pulling force or relieving, fold mechanism then can make between the 3rd and second jib by telescopic oil cylinder and be multiple angle.
Between third and fourth jib joint arm-tie and telescopic oil cylinder are housed side by side, the former can bear pulling force or relieving, and the latter then can make between the 4th and the 3rd jib joint and be multiple angle.
As follows below in conjunction with the Brief Description Of Drawings working process:
Scheme drawing when Fig. 1 is the utility model lifting operating mode. has been the plate winch among the figure, and  are assembly pulley, and  are first jib joint,  be second jib joint,  are fold mechanism, and  are arm-tie A,  be the 3rd jib joint,  are arm-tie B, and  are the 4th jib joint for folding oil cylinder ,  be the concrete distributing pipe,  are pull bar A, and  are strut,  be the insurance arm-tie,  are pull bar B, and  are crane carriage,  be body of the tower,  are the tower cap, and  are equilibrium arm.
Fig. 2 is the utility model concrete distributing operating mode scheme drawing,
Fig. 3 is fold mechanism [a 5] work scheme drawing.[5.1] are telescopic oil cylinder among the figure, and [5.2] are connecting rod A, and [5.3] are connecting rod B, connecting rod A[5.2] and connecting rod B[5.3] an end all and an end of telescopic oil cylinder [5.1] hinged, the other end then respectively with arm-tie A two annexes [6.2] and [6.3] hinged.
Fig. 4 and Fig. 5 are two views of assembly pulley  and insurance arm-tie .
(see figure 1) has reached plate winch  maintenance second jib joint  in level attitude by assembly pulley  when the utility model is in the lifting operating mode, at this moment, pull bar A, strut  is all stressed, particularly insure arm-tie , insurance position plate  is made up of two batten chains, is contained in the both sides of assembly pulley  respectively, when second jib saves  when being horizontal, insurance arm-tie  is stressed, guarantees that second jib saves  and keeps horizontality and unlikely having a down dip.In addition, arm-tie A stressed.The 3rd jib joint  and the axis of second jib joint  are remained on the horizontal linear.Arm-tie B stressed, the axis of the 4th jib joint  and the 3rd jib joint  is remained on the horizontal linear.Like this, second jib joint , the 3rd jib joint , the 4th jib joint  and first jib joint  all remain on the horizontal linear, because first jib joint  is that hoisting operation or cloth operation are all by pull bar B remain on level attitude, like this, crane carriage  can normally be walked along track, carries out hoisting operation.
When the utility model carries out the concrete distributing operation, having reached plate winch  by assembly pulley  can make second jib joint  upwarp an angle, at this moment, pull bar A, strut  is still stressed, but insurance arm-tie  is no longer stressed, sagging naturally by the insurance arm-tie  that two batten chains are formed, certainly, first jib saves still by pull bar B remain on level attitude; In addition, unclamp arm-tie A[6 between second jib joint  and the 3rd jib joint ] and arm-tie annex [6.2] is hinged, elongation telescopic oil cylinder [5.1], (see figure 3) is connecting rod A[5.2 then] and connecting rod B[5.3] will move to position shown in the long and two-short dash line among Fig. 3 respectively, be a straight line at last, then telescopic oil cylinder [5.1] no longer stretches out, and at this moment, the 3rd jib joint has constituted an acute angle with second jib joint ; Equally, unclamp the arm-tie B[8 between the 3rd jib joint  and the 4th jib joint ], the folding oil cylinder  of elongation, then the 4th jib joint  and the 3rd jib joint  can form multiple obtuse angle.So the concrete distributing pipe  that is arranged in the dolly jib is also tortuous along with folding of dolly jib, can realize the concrete distributing of different radii (that is far and near) scope.
The utility model utilizes the hinged of lower boom and is contained in the fold mechanism of top boom, can keep the trolley type jib or be horizontal, perhaps be in folded state, have lifting, two kinds of functions of cloth, and insurance arm-tie etc. is housed, be reasonable in design, safe and reliable, structure is also uncomplicated, is convenient to implement.