The duplex timber grab
Technical field
The utility model relates to a kind of duplex timber grab, specifically is used for loading and unloading timber, belongs to the crane facility technical field.
Background technology
At present, at the harbour, the timber loading and unloading of goods yard and cutting area grasp on, relevant weight-lifting equipment is equipped with mostly is four tooth timber grabs.When timber grasps operation, because the cabin space is little, need the control grab bucket to grasp angle, the extracting efficient of four tooth timber grabs is just lower, makes that the handling labor of timber is heavy and dangerous.So, need a kind of high special-purpose timber grab of timber efficient that loads and unloads.
The utility model content
The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of duplex timber grab is provided, and can load and unload timber in less operational space, the unloading high efficiency; Balance is good, can run-off the straight in the extracting process; Can grasp very long timber, timber can not fracture, and has guaranteed lumber quality.
According to the technical scheme that the utility model provides, the duplex timber grab mainly comprises a deck beam, and deck beam top is provided with balance hanger, in the balance hanger by the balance bearing pin equalizer pulley that is rotationally connected.Described deck beam is provided with two symmetrical guide wheels, and the deck beam lower end is provided with transition pulley and two top sheaves that left-right symmetric distributes that two left-right symmetric distribute.The described deck beam lower end four pairs of struts that are articulated and connected, four pairs of struts are symmetrically distributed in the both sides of two top sheaves, the lower end of every pair of strut connects a pair of curved tooth bucket body respectively, it is characterized in that: also comprise two through beams, two through beams are arranged symmetrically in the deck beam down either side, and two through beam upper ends are respectively equipped with a lower sheave.Connect four pairs of curved tooth bucket bodies on two through beams respectively, four pairs of curved tooth bucket bodies link into an integrated entity by first connecting rod and second connecting rod.Be respectively equipped with a cover of wedge on two through beams, grab bucket be installed on the equalizer pulley open and close rope, two that grab bucket opens and closes rope enters top sheave again by guide wheel, transition pulley, top sheave and lower sheave respectively, is fastened at last on the cover of wedge on the through beam.
Further, the balance hanger upper end connects the upper lift ring that two left-right symmetric distribute.
Further, connect a door machine switching rope respectively on two upper lift rings.
Further, connect two symmetrical lifting ropes on the deck beam.
Further, two guide wheels are between two lifting ropes.
Further, two transition pulleys are between two top sheaves.
Compared with the prior art the utility model has the following advantages:
The utility model is simple, compact and reasonable for structure; Can in less operational space, load and unload timber, the unloading high efficiency; Balance is good, can run-off the straight in the extracting process; Can grasp very long timber, timber can not fracture, and has guaranteed lumber quality.
Description of drawings
Fig. 1 is the utility model front view.
Fig. 2 is curved tooth bucket body structural representation.
Description of reference numerals: 1-door machine opens and closes rope, 2-balance hanger, 3-equalizer pulley, 4-lifting rope, 5-guide wheel, 6-deck beam, 7-top sheave, 8-lower sheave, 9-through beam, the curved tooth bucket body of 10-, 11-upper lift ring, 12-balance bearing pin, 13-grab bucket switching rope, 14-transition pulley, 15-cover of wedge, 16-first connecting rod, 17-second connecting rod, 18-strut.
The specific embodiment
Embodiment during following the utility model is incited somebody to action by reference to the accompanying drawings is further described:
Shown in Fig. 1 ~ 2, the utility model mainly comprises a deck beam 6, and deck beam 6 tops are provided with balance hanger 2, in the balance hanger 2 by balance bearing pin 12 equalizer pulley 3 that is rotationally connected.
Connect a door machine respectively on 11, two upper lift rings 11 of upper lift ring that described balance hanger 2 upper ends two left-right symmetric of connection distribute and open and close rope 1.
Connect two symmetrical lifting ropes 4 on the described deck beam 6.Described deck beam 6 is provided with 5, two guide wheels 5 of two symmetrical guide wheels between two lifting ropes 4.
Described deck beam 6 lower ends are provided with 7, two transition pulleys 14 of top sheave that transition pulley 14 that two left-right symmetric distribute and two left-right symmetric distribute between two top sheaves 7.
The utility model comprises that also 9, two through beams 9 of two through beams are arranged symmetrically in deck beam 6 down either side, and two through beam 9 upper ends are respectively equipped with a lower sheave 8.
Described deck beam 6 lower ends 18, the four pairs of struts 18 of four pairs of struts that are articulated and connected are symmetrically distributed in the both sides of two top sheaves 7, and the lower end of every pair of strut 18 connects a pair of curved tooth bucket body 10 respectively.
Connecting 10, four pairs of curved tooth bucket bodies 10 of four pairs of curved tooth bucket bodies on two through beams 9 respectively links into an integrated entity by first connecting rod 16 and second connecting rod 17.
Be respectively equipped with a cover of wedge 15 on two through beams 9.
Grab bucket is installed on the described equalizer pulley 3 opens and closes rope 13, two that grab bucket opens and closes rope 13 enters top sheave 7 again by guide wheel 5, transition pulley 14, top sheave 7 and lower sheave 8 respectively, is fastened at last on the cover of wedge 15 on the through beam 9.
Principle of work of the present utility model is: when work, lifting rope 4 keeps motionless, and hoisting crane control gate machine opens and closes rope 1 and descends.The decline that the door machine opens and closes rope 1 makes equalizer pulley 3 descend, and it is loose that the decline of equalizer pulley 3 makes that grab bucket opens and closes rope 13, and lower sheave 8 descends because of deadweight.Because the upper end of strut 18 is connected on the deck beam 6, keep motionless so be connected curved tooth bucket body 10 rear ends of strut 8 lower ends, the upper end of curved tooth bucket body 10 is driven by through beam 9 and descends, and curved like this tooth bucket body 10 has just opened.Controlling the curved tooth bucket body 10 of lifting rope 4 declines then arrives on the timber.
In the time of among timber is in open curved tooth bucket body 10, hoisting crane control lifting rope 4 keeps motionless, the door machine opens and closes rope 1 and rises, the door machine opens and closes rope 1 and opens and closes rope 13 toward rising by equalizer pulley 3 drive grab buckets, grab bucket opens and closes rope 13 and drives lower sheave 8 again toward rising, and this moment, curved tooth bucket body 10 slowly closed up.Promote lifting rope 4 at last, curved tooth bucket body 10 breaks away from stockpile, timber is transported to specifies the emptying point.
The utlity model has that hour unloading scope is big at the cabin mouth, rate of discharging height, and the good advantage of its balance.Can not tilt in picking up process, can grasp very long timber yet, timber can not fracture, and has guaranteed lumber quality, has greatly improved handling labor efficient.