Gantry crane capable of lifting layer by layer

Abstract

The gantry crane comprises a gantry system and a layered lifting system, the layered lifting system comprises four hoist lifting mechanisms and a trolley cross beam frame, the four hoist lifting mechanisms are arranged at the four corners of the top of the gantry system, and lifting lugs corresponding to the hoist lifting mechanisms are arranged at the four corners of the trolley cross beam frame. The trolley cross beam frame is provided with layered locking mechanisms, the four layered locking mechanisms are arranged at the four corners of the trolley cross beam frame, each layered locking mechanism comprises a layered fixing base, a guide sleeve, a locking shaft and a servo electric cylinder, and the locking shafts are driven by the servo electric cylinders to stretch into the layered fixing bases; and a plurality of layered fixed bases are distributed at equal intervals in the height direction of the portal support legs of the portal system corresponding to the locking shafts. The stacking device is stable in structure and reliable in action, the overall gravity center of the stacking device is lowered through the layered lifting system, the vertical stroke of the lifting mechanism is effectively reduced in a layered mode, and the stacking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of special logistics cranes, in particular to a gantry crane capable of lifting in layers. Background Art

[0002] At present, for the stacking of bagged materials (such as bagged rice, edible sugar, edible salt, chemical raw materials, agricultural fertilizers, etc.) during warehousing or transportation and loading, transportation equipment is used in cooperation with manual labor for stacking. After the bagged materials are conveyed to the stacking area through the conveying equipment, the state is messy, and manual stacking of each bag is required, which consumes a large amount of time and labor, has a low stacking efficiency, high costs, and safety accidents occur from time to time. Although there are also palletizing devices in the market to replace manual labor for stacking, the palletizing devices are often arranged on the trolley of the gantry crane. Since stacking needs to be carried out from bottom to top, for low-layer stacking, the palletizing device has a large vertical stroke, low stacking efficiency, and unstable operation of the lifting mechanism. Therefore, there is an urgent need to develop a layered lifting system that reduces the center of gravity of the palletizing device and reduces the vertical stroke. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the above deficiencies and provide a gantry crane capable of lifting in layers, with stable structure and reliable operation. The layered lifting system is adopted to reduce the overall center of gravity of the palletizing device, effectively reduce the vertical stroke of the lifting mechanism through layering, and improve the stacking efficiency.

[0004] The purpose of the utility model is achieved as follows:

[0005] A gantry crane capable of lifting in layers includes a gantry system and a layered lifting system. The layered lifting system includes a hoist lifting mechanism and a trolley beam frame. Four hoist lifting mechanisms are arranged at the four corners of the top of the gantry system. Lifting lugs are provided at the four corners of the trolley beam frame corresponding to the hoist lifting mechanisms. The trolley beam frame is provided with a layered locking mechanism. Four layered locking mechanisms are arranged at the four corners of the trolley beam frame. The layered locking mechanism includes a layered fixed base, a guide sleeve, a locking shaft, and a servo electric cylinder. The locking shaft is connected to the servo electric cylinder. The servo electric cylinder is fixed on the trolley beam frame through a connecting seat. A plurality of layered fixed bases are equidistantly distributed along the height direction of the gantry legs of the gantry system corresponding to the locking shaft. One end of the servo electric cylinder is hinged to the connecting seat, and the other end is hinged to the locking shaft. A guide sleeve is sleeved outside the locking shaft, and the guide sleeve is welded to the trolley beam frame.

[0006] Preferably, the gantry system includes a gantry end beam that can move back and forth, gantry legs, an upper gantry crossbeam, and an upper crossbeam of the legs. The two gantry end beams are arranged left and right. Each gantry end beam is symmetrically provided with gantry legs in the front and back. The gantry legs are fixed to the gantry end beam by bolts. The tops of the two gantry legs on the same side left and right are connected by the upper crossbeam of the legs, and the tops of the two gantry legs on the same side front and back are connected by the upper gantry crossbeam. The upper crossbeam of the legs and the upper gantry crossbeam are welded into a gantry crane frame.

[0007] Preferably, the gantry leg includes a gantry column, an inclined support, and a transverse connecting rod. The gantry column is arranged inside the inclined support, and the gantry column and the inclined support are connected by a transverse connecting rod. A plurality of transverse connecting rods are evenly spaced in the height direction of the gantry column.

[0008] Preferably, the four corners of the trolley crossbeam frame are equipped with guide wheel mechanisms. The guide wheel mechanisms are provided with two layers. At the same corner point of each layer, there are two guide wheel mechanisms, and the two guide wheel mechanisms are arranged at 90° to each other. The guide wheels of the two guide wheel mechanisms are respectively in contact with the adjacent two sides of the corresponding gantry column.

[0009] Preferably, the trolley crossbeam frame is equipped with a trolley crossbeam walkway. The trolley crossbeam walkway is connected to the trolley crossbeam frame through a support seat. An electrical control box assembly is provided on the trolley crossbeam walkway. The conveying equipment is lifted and lowered synchronously with the trolley crossbeam frame. The conveying equipment conveys the bagged materials to the trolley crossbeam walkway for the stacking vacuum suction cups of the automatic palletizing device to suck the bagged materials.

[0010] The beneficial effects of the present utility model are as follows:

[0011] The hierarchical lifting system reduces the overall center of gravity of the palletizing device, effectively reducing the vertical stroke of the lifting mechanism in layers and improving the stacking efficiency;

[0012] The four corners of the trolley crossbeam frame are equipped with guide wheel mechanisms, and the stability of vertical hierarchical lifting is achieved through the guidance of the guide wheel mechanisms;

[0013] Four hierarchical locking mechanisms are arranged at the four corners of the trolley crossbeam frame. The trolley crossbeam frame is lifted and lowered by a hoisting mechanism. After lifting to an appropriate height, the servo electric cylinder is driven, and the locking shaft extends out of the guide sleeve and inserts into the corresponding hierarchical fixed base to achieve hierarchical locking, greatly improving the stability of the trolley crossbeam frame when staying in layers. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of a gantry crane capable of hierarchical lifting according to the present utility model.

[0015] Figure 2 is Figure 1 a side view of

[0016] Figure 3 It is a schematic structural diagram of a hierarchical lifting system.

[0017] Figure 4 It is an assembly schematic diagram of the trolley crossbeam frame and the gantry leg.

[0018] Figure 5 It is a schematic structural diagram of an automatic palletizing device.

[0019] Figure 6 It is Figure 5 a side view of

[0020] Figure 7 an assembly schematic diagram of the support and the telescopic jib.

[0021] Wherein:

[0022] Gantry system 1; Gantry end beam 1.1; Gantry leg 1.2; Gantry column 1.2.1; Diagonal brace 1.2.2; Transverse connecting rod 1.2.3; Gantry upper crossbeam 1.3; Leg upper crossbeam 1.4; Hierarchical lifting system 2; Hoist lifting mechanism 2.1; Trolley crossbeam frame 2.2; Lifting lug 2.2.1; Guide wheel mechanism 2.3; Hierarchical locking mechanism 2.4; Hierarchical fixed base 2.4.1; Guide sleeve 2.4.2; Locking shaft 2.4.3; Servo electric cylinder 2.4.4; Connecting seat 2.4.5; Trolley crossbeam platform 2.5; Electrical control box assembly 2.6; Automatic palletizing device 3; Stacking transfer trolley 3.1; Support 3.2; Telescopic jib 3.3; Stacking vacuum suction cup 3.4; Longitudinal translation mechanism 3.5; Longitudinal sliding seat 3.5.1; Longitudinal rack 3.5.2; Longitudinal drive motor 3.5.3; Horizontal longitudinal linear bearing guide rail pair 3.5.4; Lifting rack 3.6; Stacking drive motor 3.7; Vertical linear bearing guide rail pair 3.8; Support plate 3.9; Adjusting plate 3.10; Locking bolt 3.11; Adjusting bolt 3.12. Specific embodiments

[0023] Referring to Figure 1-7 , the present utility model relates to a gantry crane capable of hierarchical lifting, including a gantry system 1, a hierarchical lifting system 2 and an automatic palletizing device 3. The gantry system 1 is connected to the hierarchical lifting system 2. The hierarchical lifting system 2 includes a trolley crossbeam frame 2.2 capable of hierarchical lifting, and an automatic palletizing device 3 is arranged on the trolley crossbeam frame 2.2.

[0024] The gantry system 1 includes a gantry end beam 1.1 that can move back and forth, gantry legs 1.2, a gantry upper cross beam 1.3, and a leg upper cross beam 1.4. The gantry end beam 1.1 drives the entire gantry system to move back and forth through a gantry drive mechanism. The two gantry end beams 1.1 are arranged left and right. Each gantry end beam 1.1 is symmetrically provided with gantry legs 1.2 in the front and back. The gantry legs 1.2 are fixed to the gantry end beam 1.1 by bolts. The tops of the two gantry legs 1.2 on the same side left and right are connected by a leg upper cross beam 1.4, and the tops of the two gantry legs 1.2 on the same side front and back are connected by a gantry upper cross beam 1.3. The leg upper cross beam 1.4 and the gantry upper cross beam 1.3 are welded into a gantry crane frame.

[0025] The gantry leg 1.2 includes a gantry column 1.2.1, an inclined support 1.2.2, and a transverse connecting rod 1.2.3. The gantry column 1.2.1 is arranged inside the inclined support 1.2.2. The gantry column 1.2.1 and the inclined support 1.2.2 are connected by a transverse connecting rod 1.2.3. A plurality of transverse connecting rods 1.2.3 are evenly spaced in the height direction of the gantry column 1.2.1.

[0026] The hierarchical lifting system 2 includes a hoist lifting mechanism 2.1, a trolley cross beam frame 2.2, a guide wheel mechanism 2.3, and a hierarchical locking mechanism 2.4. Four hoist lifting mechanisms 2.1 are arranged at the four corners of the top of the gantry system 1. The hoist lifting mechanism 2.1 is fixed to the corresponding leg upper cross beam 1.3. The four corners of the trolley cross beam frame 2.2 are provided with lifting lugs 2.2.1 corresponding to the hoist lifting mechanism 2.1. The hoist hook of the hoist lifting mechanism 2.1 hooks the lifting lug, driving the trolley cross beam frame 2.2 to lift and lower.

[0027] In order to make the trolley cross beam frame 2.2 lift and lower smoothly, the four corners of the trolley cross beam frame 2.2 are equipped with a guide wheel mechanism 2.3. The guide wheel mechanism 2.3 has two upper and lower layers. At the same corner point of each layer, there are two guide wheel mechanisms 2.3. The two guide wheel mechanisms 2.3 are arranged at 90° to each other. Specifically, the guide wheels of the two guide wheel mechanisms 2.3 are respectively in contact with the adjacent two sides of the corresponding gantry column 1.2.1. The guide wheel mechanism 2.3 guides to achieve vertical hierarchical lifting and lowering.

[0028] Four layer locking mechanisms 2.4 are arranged at the four corners of the trolley crossbeam frame 2.2. The layer locking mechanism 2.4 includes a layer fixing base 2.4.1, a guide sleeve 2.4.2, a locking shaft 2.4.3 and a servo electric cylinder 2.4.4. The locking shaft 2.4.3 is connected to the servo electric cylinder 2.4.4. The servo electric cylinder 2.4.4 is fixed on the trolley crossbeam frame 2.2 through a connecting seat 2.4.5. A plurality of layer fixing bases 2.4.1 are equidistantly distributed in the height direction of the gantry leg 1.2 corresponding to the locking shaft 2.4.3. One end of the servo electric cylinder 2.4.4 is hinged to the connecting seat 2.4.5, and the other end is hinged to the locking shaft 2.4.3. A guide sleeve 2.4.2 is sleeved outside the locking shaft 2.4.3, and the guide sleeve 2.4.2 is welded to the trolley crossbeam frame 2.2. The trolley crossbeam frame 2.2 is lifted and lowered by a hoisting mechanism 2.1. After being lifted to an appropriate height, the servo electric cylinder 2.4.4 is driven, and the locking shaft 2.4.3 extends out of the guide sleeve 2.4.2 and then inserts into the corresponding layer fixing base 2.4.1 to achieve layer locking.

[0029] The trolley crossbeam frame 2.2 is equipped with a trolley crossbeam platform 2.5. The trolley crossbeam platform 2.5 is connected to the trolley crossbeam frame 2.2 through a support seat. An electrical control box assembly 2.6 is provided on the trolley crossbeam platform 2.5. The conveying device (not shown in the figure) is lifted and lowered synchronously with the trolley crossbeam frame 2.2. The conveying device conveys the bagged materials to the trolley crossbeam platform 2.5 for the stacking vacuum suction cup 3.4 of the automatic palletizing device 3 to suck the bagged materials.

[0030] The automatic palletizing device 3 includes a stacking translation trolley 3.1, a longitudinally movable support 3.2, a telescopic lifting arm 3.3 and a stacking vacuum suction cup 3.4. The stacking translation trolley 3.1 moves transversely along the stacking trolley crossbeam of the trolley crossbeam frame 2.2. The stacking translation trolley 3.1 is connected to the support 3.2 through a longitudinal translation mechanism 3.5. A telescopic lifting arm 3.3 is slidably arranged in the support 3.2. A lifting rack 3.6 is arranged on one side of the telescopic lifting arm 3.3. The lifting rack 3.6 is driven by a stacking drive motor 3.7. The stacking drive motor 3.7 is fixed on the support 3.2. A lifting drive gear corresponding to the lifting rack 3.6 is arranged at the output end of the stacking drive motor. A stacking vacuum suction cup 3.4 for sucking the material package is arranged at the bottom of the telescopic lifting arm 3.3. In order to make the telescopic lifting arm lift smoothly, a vertical linear bearing guide rail pair 3.8 is also arranged between the telescopic lifting arm 3.3 and the support 3.2.

[0031] For convenient installation and to ensure the vertical lifting of the telescopic boom, the vertical linear bearing guide pair 3.8 on one side of the telescopic boom 3.3 is fixed to the support 3.2 through the support plate 3.9, and the vertical linear bearing guide pair 3.8 on the other side is fixed to the adjusting plate 3.10. The adjusting plate 3.10 is fixed to the corresponding support plate 3.9 through the locking bolt 3.11. The adjusting bolt 3.12 passes through the corresponding support plate and abuts against the adjusting plate 3.10. By tightening the adjusting bolt 3.12 to press against the adjusting plate 3.10, after the adjustment is in place, tighten the locking bolt 3.11 to achieve the rapid installation of the telescopic boom 3.3 with high installation accuracy.

[0032] The longitudinal translation mechanism 3.5 includes a longitudinal slide 3.5.1, a longitudinal rack 3.5.2, and a longitudinal drive motor 3.5.3. The longitudinal slide 3.5.1 is fixed to the stacking translation trolley 3.1. A longitudinal rack 3.5.2 is provided on the longitudinal slide 3.5.1. The longitudinal rack 3.5.2 is driven by the longitudinal drive motor 3.5.3. A longitudinal drive gear is provided at the output end of the longitudinal drive motor 3.5.3 corresponding to the longitudinal rack 3.5.2. To make the longitudinal movement of the trolley crossbeam frame stable, a horizontal longitudinal linear bearing guide pair 3.5.4 is also provided between the longitudinal slide 3.5.1 and the support 3.2.

[0033] A self-lifting stacking method includes the following steps:

[0034] Step 1: Move the gantry system back and forth to select a suitable stacking position;

[0035] Step 2: Drive the hoist lifting mechanism of the layered lifting system to drive the trolley crossbeam frame and the automatic palletizing device thereon to vertically lift, stop at each layer, reduce the overall center of gravity of the automatic palletizing device, reduce the vertical stroke, and improve the stacking efficiency; lock the trolley crossbeam frame layer by layer through the layered locking mechanism to improve the stacking safety, and at the same time reduce the shaking of the trolley crossbeam frame to improve the stacking accuracy, and adjust the height of the conveying equipment so that the conveying equipment and the trolley crossbeam frame are at the same height to facilitate the automatic palletizing device to grab the material packages.

[0036] Step 3: The stacking translation trolley drives the support and the telescopic boom to horizontally move transversely along the trolley crossbeam frame, and the longitudinal drive motor drives the support to drive the telescopic boom to horizontally move longitudinally to achieve full coverage of the working area. The stacking vacuum suction cup at the bottom of the telescopic boom sucks the material package from the trolley crossbeam platform, and the telescopic boom is driven by the stacking drive motor to lift between layers.

[0037] In addition to the above embodiments, the present invention also includes other implementation manners. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the claims of the present invention.

Claims

1. A gantry crane capable of lifting in layers, characterized in that: It includes a gantry system and a layered lifting system, the layered lifting system includes a hoist lifting mechanism and a trolley crossbeam frame, four hoist lifting mechanisms are arranged at the four corners of the top of the gantry system, and the four corners of the trolley crossbeam frame are provided with lifting ears corresponding to the hoist lifting mechanisms. The trolley crossbeam frame is provided with a layered locking mechanism, and the four layered locking mechanisms are arranged at the four corners of the trolley crossbeam frame. The layered locking mechanism includes a layered fixed base, a guide sleeve, a locking shaft and a servo electric cylinder. The locking shaft is connected to the servo electric cylinder, and the servo electric cylinder is fixed to the trolley crossbeam frame through a connecting seat. A plurality of layered fixed bases are equidistantly distributed in the height direction of the gantry legs of the gantry system corresponding to the locking shaft. One end of the servo electric cylinder is hinged to the connecting seat, and the other end is hinged to the locking shaft. A guide sleeve is provided on the outer sleeve of the locking shaft, and the guide sleeve is welded to the trolley crossbeam frame.

2. A tiered lifting gantry crane according to claim 1, characterized in that: The gantry system includes a gantry end beam that can move forward and backward, a gantry leg, a gantry upper crossbeam and a leg upper crossbeam, two gantry end beams are arranged on the left and right, each gantry end beam is symmetrically provided with a gantry leg front and back, the gantry leg is fixed to the gantry end beam by bolts, the tops of the two gantry legs on the same left and right sides are connected by the leg upper crossbeam, the tops of the two gantry legs on the same front and back sides are connected by the gantry upper crossbeam, the leg upper crossbeam and the gantry upper crossbeam are welded into a gantry crane frame.

3. A tiered lifting gantry crane according to claim 2, characterized in that: The portal legs include portal columns, oblique supports and transverse connecting rods. The portal columns are arranged on the inner side of the oblique supports. The portal columns and the oblique supports are connected by transverse connecting rods. A plurality of transverse connecting rods are evenly spaced and distributed in the height direction of the portal columns.

4. A tiered lifting gantry crane according to claim 3, characterized in that: The four corners of the trolley crossbeam frame are equipped with guide wheel mechanisms. The guide wheel mechanisms are provided with two layers, an upper layer and a lower layer. Two guide wheel mechanisms are provided at the same corner point of each layer. The two guide wheel mechanisms are arranged at 90 degrees in pairs, and the guide wheels of the two guide wheel mechanisms are respectively in contact with the adjacent two sides of the corresponding portal frame columns.

5. The tiered gantry crane according to claim 1, characterized in that: The trolley cross beam frame is equipped with a trolley cross beam platform, and the trolley cross beam platform is connected to the trolley cross beam frame through a support seat. An electrical control box assembly is provided on the trolley cross beam platform. The transmission equipment rises and falls synchronously with the trolley cross beam frame. The transmission equipment transports the bagged materials to the trolley cross beam platform for the stacking vacuum suction cup of the automatic stacking device to absorb the bagged materials.

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