CN203173688U - Combined lifting appliance of steel mould for preformed pile - Google Patents

Abstract

The utility model discloses a combined lifting appliance of a steel mould for a preformed pile. The lifting appliance is provided with two lifting lugs, wherein the lifting lugs are matched with a main hook of a travelling crane. The lifting appliance also comprises a balance beam, two guide rams, a first pneumatic claw hook, a second pneumatic claw hook, an air source and a control unit, wherein the lifting lugs are symmetrically arranged on the balance beam, the two guide arms are positioned between the travelling crane and the balance beam and symmetrically arranged at two ends of the balance beam, the first pneumatic claw hook and the second pneumatic claw hook are driven by the air source and the control unit and are arranged on the balance beam at equal intervals, the first pneumatic claw hook is used for grabbing an upper half mould which is put upside down through a runner of a steel mould, and the second pneumatic claw hook is used for grabbing a lower half mould or complete steel mould which is put upwards through a mould edge lower plane of the steel mould. The combined lifting appliance is simple and reliable in structure, capable of lifting an integrated complete steel mould, the lower half mould which is put upwards and the upper half mould which is put upside down, and also capable of simultaneously lifting one upper half mould and one lower half mould.

Description

The precast pile combined sling of punching block

Technical field

The utility model relates to the special hanger that a kind of precast pile is used punching block, be applicable to various types of punching blocks, comprise following punching block that last punching block, forward that the complete punching block that combines, back-off are placed are placed and lifting simultaneously not last punching block and the following punching block of integration downwards up.

Background technology

Along with the raising of production automation degree, multi-form accessory appliances is Application and Development constantly, convenient working not only, and raise the efficiency.In the precast pile manufacturing, hoisting operation always is the key node of production line, because the punching block that production relates to and the volume and weight of product are bigger, in order to guarantee the efficient and safety of hoisting operation, need corresponding suspender to assist or replace lifting knuckle man's operation, therefore in order to obtain higher work efficiency and better safety performance, suspender simple in structure and applied widely constantly is designed research and development aborning.

The utility model content

Technical problem to be solved in the utility model provides the combined sling that a kind of precast pile is used punching block; can lift by crane independent upper mold section or female die, perhaps lift by crane upper mold section and female die simultaneously, and lift by crane complete punching block; save artificial hook, increase work efficiency and accuracy and safety.

For solving the problems of the technologies described above, the precast pile that the utility model the provides combined sling of punching block, described suspender is provided with two hangers, this hanger cooperates with the main hook of driving, described suspender also comprises equalizing bar, two guide arms, the first pneumatic grapple, the second pneumatic grapple, source of the gas and control unit, described hanger is symmetricly set on the equalizing bar, described two guide arms between driving and equalizing bar and symmetry be installed in the two ends of equalizing bar, the described first pneumatic grapple and the second pneumatic grapple drive by source of the gas and control unit and are arranged on the equalizing bar equally spacedly; The described first pneumatic grapple grasps the upper mold section that back-off is placed downwards by the running wheel of punching block, and the described second pneumatic grapple grasps female die or the complete punching block that forward is placed up by the mould limit lower plane of punching block.

Wherein, the described first pneumatic grapple comprises bearing, four gib heads, oscillating bearing, hinge, two gib head bolt of rear end plates, two fixed pin shafts, cylinder saddle and cylinders, described bearing is fixed on the equalizing bar, cylinder is fixed on the bearing by cylinder saddle, the piston rod of cylinder is threaded with oscillating bearing, hinge is installed in the oscillating bearing, and the two ends of hinge lay respectively in two bullports of bearing; Two lower ends in described four gib heads are connected to form the first gib head group by a gib head bolt of rear end plate, two lower ends are connected to form the second gib head group by another gib head bolt of rear end plate in addition, the upper end of each gib head is formed with the pilot hole of strip shape, the described first gib head group and the second gib head group are enclosed within on the hinge rotationally and are the scissors shape, described two fixed pin shafts are arranged on the bearing symmetrically, the two ends of one of them fixed pin shaft lay respectively in two pilot holes of the first gib head group, and the two ends of another fixed pin shaft lay respectively in two pilot holes of the second gib head group.

Further, the axis of described two fixed pin shafts and the axis of hinge are parallel to each other, and the axis of two fixed pin shafts is identical to the distance of the axis of hinge.The pilot hole of the pilot hole of the described first gib head group and the second gib head group is symmetrically located at the both sides on the plane that is formed by the axis of cylinder piston rod and hinge axis.

Wherein, the described second pneumatic grapple comprises bearing, cylinder, cylinder saddle, first gib head, second gib head, first gear, second gear and two bearing pins, described bearing is fixed on the equalizing bar, cylinder is fixed on the bearing by cylinder saddle, the two ends of described bearing pin are fixed on the bearing, wherein be with first gib head and a sliding shaft sleeve on the bearing pin, be with second gib head and another sliding shaft sleeve on another bearing pin, two sliding shaft sleeves respectively with first gear, the second gear captive joint, described first gear is captiveed joint with first gib head, second gear is captiveed joint with second gib head, and first gear and second gear are meshed; The axis of described two bearing pins is in same horizontal surface, and described first gib head and the part of second gib head below bearing pin place and bearing pin are left-right symmetric, and an end and the piston rod of cylinder of first gib head above bearing pin is hinged.

Further, to be parallel to centered by bearing pin axis, the mid point and the plane perpendicular to two bearing pin axis place horizontal surfaces through two gear center lines, described first gib head is in the part below bearing pin place and the bearing pin and the part left-right symmetric of second gib head below bearing pin place and bearing pin, described first and second gear is welded on the plain bearing respectively, described first gear and first gib head link together by bolt, and described second gear and second gib head link together by bolt.

In said structure, described guide arm is the plane double connecting rod, and it comprises a first connecting rod and a second connecting rod, and wherein the crossbeam of an end of first connecting rod and driving is hinged, one end of the other end and second connecting rod is hinged, and the other end and the equalizing bar of second connecting rod are hinged.

Wherein, described two hangers lay respectively at the inboard, hinged place of guide arm and the equalizing bar of homonymy.

Wherein, described equalizing bar is provided with four first pneumatic grapples and four second pneumatic grapples, and the spacing between the pneumatic grapple of the same type is four meters.

Wherein, the pneumatic circuit between described source of the gas and source of the gas and the pneumatic grapple is located on equalizing bar or the runway grider.

Usefulness of the present utility model is:

1, combined sling of the present utility model cooperates with driving, can lift by crane and integrate good complete punching block, the female die that forward is placed, the upper mold section that back-off is placed up downwards, can also lift by crane a upper mold section and a female die simultaneously; Wherein the first pneumatic grapple is applicable to grasp and integrates good complete punching block or upper mold section, and the second pneumatic grapple can grasp to be integrated good complete punching block or female die and also can grasp female die when the first pneumatic grapple grasps upper mold section;

2, first of this combined sling pneumatic grapple moves up and down by the flexible drive hinge of cylinder piston rod, and the pilot hole of gib head cooperates the first half that makes gib head to move along pilot hole with fixed pin shaft, finishes the action that discharges punching block and firmly grasp punching block thereby the latter half realizes opening and closing; The second pneumatic grapple then rotates by flexible drive first gib head of cylinder piston rod, and then drive first gear and rotate, with second gear of first gear engagement and the corresponding rotation of second gib head that links together with second gear, thereby realize opening and closing up of gib head, finish and discharge punching block and the promptly action of punching block;

3, self-locking takes place when the pilot hole of gib head makes gib head handling weight in the first pneumatic grapple, distance between the mould limit lower plane that the center of turn of gib head in the second pneumatic grapple (being the bearing pin axis) contacts with punching block to gib head is equal, the power that makes punching block act on two gib heads can decomposite a horizontal component of force, thereby these two horizontal component of forces make two gib heads be tending towards closing up in opposite directions realizes effective self-locking, therefore, in the handling process and punching block steadily do not place under the stressed situation of gib head, gib head all can't be opened, guarantee the safety of lifting job, stopped the possibility that weight breaks off relations;

4, guide arm leads to equalizing bar, reduces the amplitude of fluctuation of equalizing bar in lifting process effectively, the location of auxiliary balance beam fast and stable and pneumatic grapple.

Description of drawings

Fig. 1 is structural representation of the present utility model, and wherein a is complete punching block, and b is half punching block (upper mold section) that back-off is placed downwards, and c is half punching block (female die) that forward is placed up;

Fig. 2 is the scheme drawing that the first pneumatic grapple is in open configuration in the utility model;

Fig. 3 is the scheme drawing that the first pneumatic grapple is in closure state in the utility model;

Fig. 4 is the lateral plan of Fig. 3;

Fig. 5 is the scheme drawing that the second pneumatic grapple is flared to end position in the utility model;

Fig. 6 is that the second pneumatic grapple closes up scheme drawing to end position in the utility model;

Fig. 7 is the lateral plan of Fig. 6;

Fig. 8 is the scheme drawing that passes through the complete punching block of the second pneumatic grapple handling in the utility model;

Fig. 9 is the scheme drawing that passes through the first pneumatic grapple handling upper mold section in the utility model;

Figure 10 is the scheme drawing that passes through the second pneumatic grapple handling female die in the utility model;

Figure 11 is the scheme drawing by the second pneumatic grapple handling female die by the first pneumatic grapple handling upper mold section time in the utility model.

Wherein description of reference numerals is as follows:

The specific embodiment

Below in conjunction with accompanying drawing and the specific embodiment the utility model is described in further detail.

The precast pile that the utility model the provides combined sling of punching block, as shown in Figure 1, comprise equalizing bar 2, two guide arms 1, the first pneumatic grapple 3, the second pneumatic grapple 4, source of the gas 5 and control unit, be symmetrically arranged with two hangers 6 on the equalizing bar 2, this hanger 6 cooperates with the main hook 7 of driving, namely Hang Che main hook 7 hangs the hanger 6 on the equalizing bar 2, drives by the lift system of driving a vehicle to make equalizing bar 2 promote punching blocks.Two guide arms 1 are between driving and equalizing bar 2, and the symmetrical two ends that are installed in equalizing bar 2, and two hangers 6 lay respectively at the inboard, hinged place of guide arm 1 with the equalizing bar 2 of homonymy.The first pneumatic grapple 3 and the second pneumatic grapple 4 are all driven by source of the gas 5 and control unit, and be arranged on equally spacedly on the equalizing bar 2, in the present embodiment, equalizing bar 2 is provided with four first pneumatic grapples 3 and the second pneumatic grapple 4, and the spacing between the pneumatic grapple of same type is four meters.

Guide arm 1 is the plane double connecting rod, and it comprises a first connecting rod and a second connecting rod, and wherein the crossbeam of an end of first connecting rod and driving is hinged, and an end of the other end and second connecting rod is hinged, and the other end of second connecting rod and equalizing bar 2 are hinged.Driving comprises two crossbeams, respectively be provided with the lift system of a band main hook 7 on two dollies that crossbeam is walked, guide arm 1 makes the line of centres of two main hooks, the 7 corresponding dollies that are in the nature hang and the central axis coplanar or coplanar substantially (allowing equalizing bar 2 that less swing space is arranged in the horizontal direction) of equalizing bar 2.Guide arm leads to equalizing bar, reduces the amplitude of fluctuation of equalizing bar in lifting process effectively, the location of auxiliary balance beam fast and stable and pneumatic grapple.

The first pneumatic grapple 3 can grasp upper mold section (as shown in Figure 9) or the whole punching block that back-off is placed downwards by the running wheel of punching block, the second pneumatic grapple 4 grasps female die (as shown in figure 10) or the complete punching block (as shown in Figure 8) that forward is placed up by the mould limit lower plane of punching block, because it is comparatively simple that the second pneumatic grapple 4 grasps the process of whole punching block, so the second pneumatic grapples 4 that adopt during the whole punching block of handling more.In addition, when needs lift by crane independent upper mold section and female die simultaneously, need the first pneumatic grapple 3 and the second pneumatic grapple 4 to be used in combination, namely grasp upper mold section with the first pneumatic grapple 3 earlier, and then grasp female die with the second pneumatic grapple, as shown in figure 11.

The first pneumatic grapple 3 comprises bearing 31, four gib heads 32, oscillating bearing 34, hinge 35, two gib head bolt of rear end plates 36, two fixed pin shafts 37, cylinder saddle 33 and cylinders 38, as Fig. 2, Fig. 3 and shown in Figure 4, wherein bearing 31 is fixed on the equalizing bar 2, cylinder 38 is fixed on the bearing 31 by cylinder saddle 33, the piston rod of cylinder 38 is threaded with oscillating bearing 34, and hinge 35 is installed in the oscillating bearing 34 and the two ends of hinge 35 lay respectively in two bullports of bearing 31.As shown in Figure 4, two lower ends in four gib heads 32 are connected to form the first gib head group by a gib head bolt of rear end plate 36, two lower ends are connected to form the second gib head group by another gib head bolt of rear end plate 36 in addition, the upper end of each gib head 32 is formed with the pilot hole 39 of strip shape, as shown in Figure 5, handle through surface heat the crawl position of gib head 32 contact running wheels 5 in addition.The first gib head group and the second gib head group are enclosed within on the hinge 35 rotationally and are the scissors shape, as shown in Figures 2 and 3, two fixed pin shafts 37 are arranged on the bearing 31 symmetrically, the two ends of one of them fixed pin shaft 37 lay respectively in two pilot holes 39 of the first gib head group, and the two ends of another fixed pin shaft 37 lay respectively in two pilot holes 39 of the second gib head group.

The second pneumatic grapple 4 comprises bearing 41, cylinder 42, cylinder saddle 43, first gib head 44, second gib head 45, first gear 47, second gear 48 and two bearing pins 46, as Fig. 5, Fig. 6 and shown in Figure 7, bearing 41 is fixed on the equalizing bar 2, and cylinder 42 is fixed on the bearing 41 by cylinder saddle 43.As shown in Figure 7, the two ends of bearing pin 46 are fixed on the bearing 41, wherein be with first gib head 44 and a sliding shaft sleeve on the bearing pin 46, be with second gib head 45 and another sliding shaft sleeve on another bearing pin 46, two sliding shaft sleeves are captiveed joint with first gear 47, second gear 48 respectively, described first gear 47 is captiveed joint with first gib head 44, and second gear 48 is captiveed joint with second gib head 45, and first gear 47 and second gear 48 are meshed.The axis of two bearing pins 46 is in same horizontal surface, as shown in Figure 5 and Figure 6, to be parallel to centered by bearing pin 46 axis, the mid point and the plane perpendicular to two bearing pins, 46 axis place horizontal surfaces through two gears 44,45 lines of centres, first gib head 44 is in the part below bearing pin 46 places and the bearing pin 46 and the part left-right symmetric of second gib head 45 below bearing pin 46 places and bearing pin 46; An end and the piston rod of cylinder 42 of first gib head 44 above bearing pin 46 is hinged.

Described first and second gear 47,48 is welded on (not shown) on the plain bearing respectively, can certainly pass through other structure captive joint, as key connection etc.Described first gear 47 and first gib head 44 link together by bolt, and described second gear 48 and second gib head 45 link together by bolt, as shown in Figure 7.In addition, the surface of first gib head 44 that contacts with the mould limit lower plane of no matched moulds locking piece on the punching block and second gib head 45 is through bakingout process.

The extracting point of the second pneumatic grapple 4 on punching block is the mould limit lower plane of the no matched moulds locking piece of punching block, because mould limit lower plane is coplanar, so equalizing bar 2 requires to have enough rigidity and intensity, makes the crawl position of gib head 44,45 on the lower plane of mould limit of the second pneumatic grapple 4 mounted thereto in the same plane.The extracting point of the first pneumatic grapple 3 on punching block is the running wheel of punching block, because the corresponding conllinear in the position of running wheel, so equalizing bar 2 requires to have enough rigidity and intensity, and the gib head 32 of the first pneumatic grapple 3 mounted thereto is on the same straight line at the point of the extracting on the running wheel.

When grasping inverted first punching block, the control unit gib head of the control second pneumatic grapple 4 is earlier opened, and the piston rod that drives cylinder 38 in the first pneumatic grapple 3 is then regained, and piston rod drives hinge 35 upwards motion in the bullport of bearing 31.Meanwhile, the pilot hole 39 of gib head 32 upper ends cooperates with fixed pin shaft 37, the first half of gib head 32 (gib head 32 and the part of hinge 35 junctions to pilot hole 39) is outwards mobile under the guiding of fixed pin shaft 37, and the latter half of gib head 32 (parts of gib head 32 and hinge 35 junctions to gib head 32 lower ends) is outwards opened an angle centered by hinge 35.The main hook 6 of driving descends, driving equalizing bar 2 descends, when the V-type location structure of lower end, bearing 31 both sides lean against finish location (as shown in Figure 4) on the running wheel 5 after, control unit sends clamping signal, the piston rod of cylinder 38 stretches out, and piston rod drives hinge 35 motion downwards in the bullport of bearing 31.Simultaneously, the first half of gib head 32 moves inward under the guiding of fixed pin shaft 37, thereby the latter half of gib head 32 is inwardly tightened up clamping punching block running wheel centered by hinge 35, and the main hook 7 of driving a vehicle then drives equalizing bars 2 lifting punching blocks, as shown in Figure 9.Place when steady when punching block winches to assigned address, control unit sends release signal, and cylinder 38 and gib head 32 repeat aforementioned activities makes the latter half of gib head 32 discharge punching block.

When grasping half punching block (the following punching block b among Fig. 1) that complete punching block or forward place up; control unit drives the piston rod of cylinder 42 in the second pneumatic grapple 4 and regains; under the drive of piston rod; first gib head 44 is positioned at part outside rotating opening centered by the axis of the bearing pin 46 at its place of bearing pin 46 belows; rotate by first gear 47 that bolt links together with first gib head 44 thereupon; second gear 48 that is meshed simultaneously rotates; so the part that second gib head 45 of captiveing joint with second gear 46 is positioned at bearing pin 46 belows also outside rotating opening centered by the axis of the bearing pin 46 at its place is gib head 44; 45 open the formation certain included angle.The main hook 7 of driving descends, driving equalizing bar 2 descends, when the second pneumatic grapple 4 arrives suitable position near punching block, control unit sends and closes up signal, the piston rod of cylinder 42 stretches out, first gear, 47 rotations that piston rod drives first gib head 44 and captives joint with first gib head 44, meanwhile, second gear 48 rotates with second gib head 45 of captiveing joint with second gear 48, first gib head 44 and second gib head 45 clamp punching block, the main hook 7 of driving a vehicle then drives equalizing bar 2 lifting punching blocks, as Fig. 8 and shown in Figure 10.Place when steady when punching block winches to assigned address, control unit sends release signal, and cylinder 42 and gib head 44,45 repeat aforementioned activities makes gib head discharge punching block.

When the upper mold section that separates when the while handling and female die, control unit drives the gib head of the first pneumatic grapple 3 and the second pneumatic grapple 4 earlier and all opens, utilize the gib head of the first pneumatic grapple 3 to grasp running wheel on the upper mold section then, secondly with the upper mold section handling directly over female die, then the second pneumatic grapple 4 is reduced to suitable height, two gib heads that close up the second pneumatic grapple 4 at last make the stay mould limit lower plane of half module of its extracting, as shown in figure 11.After placing female die handling to assigned address steadily, control unit drives the second pneumatic grapple 4 and opens the release female die, then upper mold section is winched to after assigned address puts well, and control unit drives the first pneumatic grapple 3 again and opens the release upper mold section.

The axis of the axis of two fixed pin shafts 37 and hinge 35 is parallel to each other, and the axis of two fixed pin shafts 37 is identical to the distance of the axis of hinge 35.The pilot hole 39 of the first gib head group and the pilot hole 39 of the second gib head group are symmetrically located at the both sides on the plane that is formed by the axis of cylinder 38 piston rods and hinge 35 axis.During the first pneumatic grapple, 3 lifting punching blocks, gib head 32 is subjected to punching block clamps gib head 32 to the component that its power produces, and effectively realizes self-locking.Simultaneously, because the symmetrical structure of first gib head and second gib head in the second pneumatic grapple 4, and the distance between the mould limit lower plane that the center of turn of gib head (being the bearing pin axis) contacts with punching block to gib head is equal, when the second pneumatic grapple 4 lifts by crane punching blocks, the power that punching block acts on two gib heads 44,45 can decomposite a horizontal component of force, realizes effective self-locking thereby these two horizontal component of forces make two gib heads 44,45 be tending towards closing up in opposite directions.Therefore, when the punching block placement was steady, gib head can't be opened, and made cylinder open the maloperation instruction of gib head even send, and the power that cylinder produces also deficiency has improved the safe reliability of lifting so that gib head opens.

The maximum specification punching block size design that gib head 44,45 unitized construction can grasp according to needs in producing, when grasping the punching block of maximum specification, two gib heads near and be parallel to each other with the punching block contact portion, up draw in gradually again, the space that closes up formation can hold the upper mold section of maximum specification punching block, therefore the female die except can the handling forward placing can also the whole punching block of handling.

Cylinder 38,42 is double-acting cylinder, only needs work when punching block surely places on the supported underneath thing, its push away or the power of drag hook head all less, so cylinder 38,42 cylinder diameter or operation pressure do not need too big.Pneumatic circuit between described source of the gas 5 and source of the gas 5 and the pneumatic grapple is located on equalizing bar 2 or the runway grider.

More than by specific embodiment the utility model is had been described in detail, this embodiment only is preferred embodiment of the present utility model, it is not that the utility model is limited.Under the situation that does not break away from the utility model principle, equivalent replacement and improvement that those skilled in the art makes the quantity of the guide arm structure of suspender, pneumatic grapple and structure etc. all should be considered as in the technology category that the utility model is protected.

Claims (10)

1. a precast pile is with the combined sling of punching block, described suspender is provided with two hangers (6), this hanger (6) cooperates with the main hook (7) of driving, it is characterized in that, described suspender also comprises equalizing bar (2), two guide arms (1), the first pneumatic grapple (3), the second pneumatic grapple (4), source of the gas (5) and control unit, described hanger (6) is symmetricly set on the equalizing bar (2), described two guide arms (1) are positioned between driving and the equalizing bar (2) and symmetry is installed in the two ends of equalizing bar (2), and the described first pneumatic grapple (3) and the second pneumatic grapple (4) also are arranged on the equalizing bar (2) equally spacedly by source of the gas (5) and control unit driving; The described first pneumatic grapple (3) grasps the upper mold section that back-off is placed downwards by the running wheel of punching block, and the described second pneumatic grapple (4) grasps female die or the complete punching block that forward is placed up by the mould limit lower plane of punching block.

2. precast pile according to claim 1 is with the combined sling of punching block, it is characterized in that, the described first pneumatic grapple (3) comprises bearing (31), four gib heads (32), oscillating bearing (34), hinge (35), two gib head bolt of rear end plates (36), two fixed pin shafts (37), cylinder saddle (33) and cylinder (38), described bearing (31) is fixed on the equalizing bar (2), cylinder (38) is fixed on the bearing (31) by cylinder saddle (33), the piston rod of cylinder (38) is threaded with oscillating bearing (34), hinge (35) is installed in the oscillating bearing (34), and the two ends of hinge (35) lay respectively in two bullports of bearing (31); Two lower ends in described four gib heads (32) are connected to form the first gib head group by a gib head bolt of rear end plate (36), two lower ends are connected to form the second gib head group by another gib head bolt of rear end plate (36) in addition, the upper end of each gib head (32) is formed with the pilot hole (39) of strip shape, the described first gib head group and the second gib head group are enclosed within hinge (35) rotationally upward and are the scissors shape, described two fixed pin shafts (37) are arranged on the bearing (31) symmetrically, the two ends of one of them fixed pin shaft (37) lay respectively in two pilot holes (39) of the first gib head group, and the two ends of another fixed pin shaft (37) lay respectively in two pilot holes (39) of the second gib head group.

3. precast pile according to claim 2 is with the combined sling of punching block, it is characterized in that, the axis of the axis of described two fixed pin shafts (37) and hinge (35) is parallel to each other, and the axis of two fixed pin shafts (37) is identical to the distance of the axis of hinge (35).

4. precast pile according to claim 2 is with the combined sling of punching block, it is characterized in that the pilot hole (39) of the pilot hole of the described first gib head group (39) and the second gib head group is symmetrically located at the both sides on the plane that axis and hinge axis by cylinder (38) piston rod form.

5. precast pile according to claim 1 is with the combined sling of punching block, it is characterized in that, the described second pneumatic grapple (4) comprises bearing (41), cylinder (42), cylinder saddle (43), first gib head (44), second gib head (45), first gear (47), second gear (48) and two bearing pins (46), described bearing (41) is fixed on the equalizing bar (2), cylinder (42) is fixed on the bearing (41) by cylinder saddle (43), the two ends of described bearing pin (46) are fixed on the bearing (41), wherein be with first gib head (44) and a sliding shaft sleeve on the bearing pin (46), be with second gib head (45) and another sliding shaft sleeve on another bearing pin (46), two sliding shaft sleeves respectively with first gear (47), second gear (48) captive joint, described first gear (47) is captiveed joint with first gib head (44), second gear (48) is captiveed joint with second gib head (45), and first gear (47) and second gear (48) are meshed; The axis of described two bearing pins (46) is in same horizontal surface, described first gib head (44) and second gib head (45) are located and the part of bearing pin (46) below is left-right symmetric at bearing pin (46), and first gib head (44) is hinged at the piston rod of an end of bearing pin (46) top and cylinder (42).

6. precast pile according to claim 5 is with the combined sling of punching block, it is characterized in that, being parallel to centered by bearing pin (46) axis, the mid point and the plane perpendicular to two bearing pins (46) axis place horizontal surface through two gears (44, the 45) line of centres, described first gib head (44) is located and the part of bearing pin (46) below and second gib head (45) are located and the part left-right symmetric of bearing pin (46) below at bearing pin (46) at bearing pin (46).

7. precast pile according to claim 5 is with the combined sling of punching block, it is characterized in that, described first and second gear (47,48) is welded on the plain bearing respectively, described first gear (47) and first gib head (44) link together by bolt, and described second gear (48) and second gib head (45) link together by bolt.

8. precast pile according to claim 1 is with the combined sling of punching block, it is characterized in that, described guide arm (1) is the plane double connecting rod, it comprises a first connecting rod and a second connecting rod, wherein the crossbeam of an end of first connecting rod and driving is hinged, one end of the other end and second connecting rod is hinged, and the other end of second connecting rod and equalizing bar (2) are hinged.

9. precast pile according to claim 1 is characterized in that with the combined sling of punching block described two hangers (6) lay respectively at the inboard, hinged place of guide arm (1) Yu the equalizing bar (2) of homonymy.

10. precast pile according to claim 1 is characterized in that with the combined sling of punching block described equalizing bar (2) is provided with four first pneumatic grapples (3) and four second pneumatic grapples (4), and the spacing between the pneumatic grapple of the same type is four meters.

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