Portal crane for roads and bridges

Abstract

The utility model discloses a portal crane for roads and bridges, and relates to the technical field of cranes, in particular to a portal crane for roads and bridges, which comprises a lower cross beam, a first protection box is arranged at the top of the lower cross beam, a first motor is arranged in the first protection box, and a first bevel gear is arranged at the output end of the first motor. A first rotating rod is rotationally connected into the lower cross beam through a bearing, a second bevel gear is arranged at one end of the first rotating rod, and a first rotating shaft is arranged at the other end of the first rotating rod. According to the portal crane for the road and the bridge, through the arrangement of a fixing rod, a second motor, a second rotating rod, a third bevel gear, a fourth bevel gear, a lead screw, a supporting column, a second supporting leg, a first supporting leg, a first motor, a first bevel gear and a second bevel gear, the portal crane for the road and the bridge has the beneficial effects that the height of the crane can be adjusted; and all sundries on the guide rail in the traveling direction of the traveling wheels can be cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a gantry crane for roads and bridges. Background Art

[0002] Gantry cranes are also used in road and bridge construction projects. Gantry cranes (also known as gantry cranes) are bridge-type cranes whose bridges are supported on ground tracks by legs on both sides. Structurally, they are composed of a lower end beam, upper end beam, main beam, trolley running mechanism, lifting trolley and electrical parts. The gantry crane's gantry is composed of an upper bridge frame (including main beams and end beams), legs, lower crossbeam and other parts.

[0003] The existing gantry cranes for road and bridge use are not convenient for cleaning debris on the guide rails in the direction of wheel travel, for adjusting the height of the crane, and for adjusting the distance between the two hooks during use. A gantry crane for road and bridge use is currently available to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a gantry crane for road and bridge use, which solves the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a gantry crane for road and bridge, including a lower crossbeam, a first protection box is arranged on the top of the lower crossbeam, a first motor is arranged inside the first protection box, a first bevel gear is arranged at the output end of the first motor, a first rotating rod is rotatably connected to the inside of the lower crossbeam through a bearing, a second bevel gear is arranged at one end of the first rotating rod, a first rotating shaft is arranged at the other end of the first rotating rod, a first supporting leg is fixedly connected to the top of the lower crossbeam by bolts, a pillar is arranged inside the first supporting leg, a second motor is arranged inside the pillar, and the first A second rotating rod is provided at the output end of the second motor, and a third bevel gear is sleeved on the outer surface of the second rotating rod. A lead screw is rotatably connected to the inside of the pillar through a bearing, and a fourth bevel gear is provided at the bottom of the lead screw. The second supporting leg is inserted into the inside of the first supporting leg, and the top of the second support is fixedly connected to the upper crossbeam by bolts, and a first baffle is provided on the top of the upper crossbeam, a second protective box is provided on one side of the first baffle, and a third motor is provided inside the second protective box, and a third rotating rod is provided at the output end of the third motor, a first cable is wound around the outer surface of the third rotating rod, and a third protective box is provided at the other end of the second cable.

[0008] Optionally, the first bevel gear and the second bevel gear are meshed, a second baffle is provided at the bottom of the lower cross beam, the interior of the second baffle is rotatably connected to a fourth rotating rod through a bearing, a second rotating shaft is provided at one end of the fourth rotating rod, a rotating belt is clamped in the groove of the second rotating shaft, the rotating belt is clamped in the groove of the first rotating shaft, and a roller brush is sleeved on the outer surface of the fourth rotating rod.

[0009] Optionally, a third baffle is provided at the bottom of the lower cross beam, the interior of the third baffle is rotatably connected to a fifth rotating rod via a bearing, and a wheel is sleeved on the outer surface of the fifth rotating rod.

[0010] Optionally, the third bevel gear is meshed with the fourth bevel gear, and the lead screw is connected to the inside of the second supporting leg. The first supporting leg, the second supporting leg and the pillar are all provided with through holes, and the inside of the through holes is provided with a fixing rod adapted to the inner diameter of the through holes.

[0011] Optionally, a fourth motor is disposed inside the third protective box, a bidirectional lead screw is disposed at the output end of the fourth motor, a slider is transmission-connected to the outer surface of the bidirectional lead screw, and a hook is tied to the bottom of the slider via a cable.

[0012] Optionally, a slot is provided on the inner bottom wall of the third protective box, and the slide block is clamped inside the slot.

[0013] Optionally, a fourth baffle is provided on the top of the upper cross beam, a fourth protective box is provided on one side of the fourth baffle, a fifth motor is provided inside the fourth protective box, a sixth rotating rod is provided at the output end of the fifth motor, a second cable is wound around the outer surface of the sixth rotating rod, and the other end of the second cable is provided on the top of the third protective box.

[0014] Optionally, an oblique square hole is opened inside the upper cross beam, and a fixed pulley is arranged inside the oblique square hole.

[0015] (III) Beneficial effects

[0016] The utility model provides a gantry crane for road and bridge use, which has the following beneficial effects:

[0017] 1. This gantry crane for road and bridge use has the effect of adjusting the height of the crane and clearing all debris on the guide rail in the direction of travel of the walking wheel through the arrangement of a fixed rod, a second motor, a second rotating rod, a third bevel gear, a fourth bevel gear, a screw, a pillar, a second supporting leg, a first supporting leg, a first motor, a first bevel gear and a second bevel gear.

[0018] 2. This type of gantry crane for road and bridge use, through the arrangement of the fourth motor, the bidirectional screw, the slider, the hook, the third motor, the third rotating rod, the first cable, the fifth motor, the sixth rotating rod, the second cable, the third protective box, the fixed pulley, the upper crossbeam and the hook, enables the gantry crane for road and bridge use to adjust the distance between the two hooks, thereby being able to lift longer workpieces and enhance the stability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the front view of the crane of the utility model;

[0021] Figure 3 It is a structural schematic diagram of a cross-sectional view of the first supporting leg and the second supporting leg of the utility model;

[0022] Figure 4 It is a structural schematic diagram of a cross-sectional view of a third protection box of the utility model;

[0023] Figure 5 For this utility model Figure 2 A is a schematic diagram of the structure of the enlarged view of the middle A;

[0024] Figure 6 For this utility model Figure 2 A schematic diagram of the structure of the enlarged view of B;

[0025] Figure 7 It is a structural schematic diagram of the top view of the crane of the utility model.

[0026] In the figure: 1, lower crossbeam; 2, wheel; 3, first protection box; 4, first supporting leg; 5, second supporting leg; 6, upper crossbeam; 7, second cable; 8, first cable; 9, third protection box; 10, fixed rod; 11, roller brush; 12, second rotating shaft; 13, rotating belt; 14, first rotating shaft; 15, hook; 16, first bevel gear; 17, first motor; 18, first rotating rod; 19, second bevel gear; 20, slot; 21, two-way lead screw; 22, slider; 23, fourth motor; 24, lead screw; 25, fourth bevel gear; 26, second motor; 27, third bevel gear; 28, pillar; 29, fixed pulley; 30, fourth rotating rod; 31, fifth motor; 32, second rotating rod; 33, third rotating rod; 34, third motor; 35, sixth rotating rod. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] Example 1

[0029] A gantry crane for a road and bridge comprises a lower crossbeam 1, a first protection box 3 is arranged on the top of the lower crossbeam 1, a first motor 17 is arranged inside the first protection box 3, a first bevel gear 16 is arranged at the output end of the first motor 17, a first rotating rod 18 is rotatably connected to the inside of the lower crossbeam 1 through a bearing, a second bevel gear 19 is arranged at one end of the first rotating rod 18, a first rotating shaft 14 is arranged at the other end of the first rotating rod 18, a first supporting leg 4 is fixedly connected to the top of the lower crossbeam 1 through bolts, a pillar 28 is arranged inside the first supporting leg 4, a second motor 26 is arranged inside the pillar 28, a second rotating rod 32 is arranged at the output end of the second motor 26, a third bevel gear 27 is sleeved on the outer surface of the second rotating rod 32, a lead screw 24 is rotatably connected to the inside of the pillar 28 through a bearing, a fourth bevel gear 25 is arranged at the bottom of the lead screw 24, and a second supporting leg 4 is inserted into the inside of the first supporting leg 4 5. The top of the second support is fixedly connected with the upper cross beam 6 by bolts, the first bevel gear 16 and the second bevel gear 19 are meshed, the bottom of the lower cross beam 1 is provided with a second baffle, the interior of the second baffle is rotatably connected with the fourth rotating rod 30 through a bearing, one end of the fourth rotating rod 30 is provided with a second rotating shaft 12, the groove of the second rotating shaft 12 is clamped with a rotating belt 13, the rotating belt 13 is clamped in the groove of the first rotating shaft 14, the outer surface of the fourth rotating rod 30 is sleeved with a roller brush 11, the bottom of the lower cross beam 1 is provided with a third baffle, the interior of the third baffle is rotatably connected with the fifth rotating rod through a bearing, the outer surface of the fifth rotating rod is sleeved with a wheel 2, the third bevel gear 27 is meshed with the fourth bevel gear 25, the lead screw 24 is connected to the interior of the second supporting leg 5, the first supporting leg 4, the second supporting leg 5 and the pillar 28 are all provided with through holes, and the interior of the through hole is provided with a fixing rod 10 adapted to the inner diameter of the through hole.

[0030] In order to achieve the effect of adjusting the height of the gantry crane, all debris on the guide rail in the direction of travel of the traveling wheel can be cleaned, as shown in the attached Figure 1-3 and Figure 6As shown, the present application adopts the following structure, through the cooperation of the fixed rod 10, the second motor 26, the second rotating rod 32, the third bevel gear 27, the fourth bevel gear 25, the screw 24, the pillar 28, the second supporting leg 5, the first supporting leg 4, the first motor 17, the first bevel gear 16 and the second bevel gear 19, during use, when the height of the crane is to be adjusted, the fixed rod 10 is first pulled out of the through hole, and then the second motor 26 is started by the controller, and the output end of the second motor 26 drives the second rotating rod 32 and the third bevel gear 27, and the third bevel gear 27 drives the fourth bevel gear 25 and the screw 24 meshing with the third bevel gear 27, and the screw 24 rotates inside the pillar 28 to make the second supporting leg 5 move upward along the first supporting leg 4, when the second supporting leg 5 moves to the appropriate After reaching the height, the second motor 26 stops rotating and the fixing rod 10 is inserted into the through holes of the first supporting leg 4, the second supporting leg 5 and the pillar 28 to prevent the second supporting leg 5 from falling. When cleaning the debris on the guide rail in the direction of travel of the wheel 2, the first motor 17 is started by the controller, and the first motor 17 drives the first bevel gear 16. The first bevel gear 16 rotates and drives the second bevel gear 19 meshing with the first bevel gear 16. The second bevel gear 19 drives the first rotating rod 18, the first rotating shaft 14 and the rotating belt 13. The rotating belt 13 drives the second rotating shaft 12, the fourth rotating rod 30 and the roller brush 11. The roller brush 11 rotates to clean the ground, thereby achieving the effect that the road and bridge gantry crane has the ability to adjust the height of the crane and clean all debris on the guide rail in the direction of travel of the walking wheel.

[0031] Example 2

[0032] A gantry crane for a road bridge, wherein a first baffle is arranged on the top of an upper cross beam 6, a second protection box is arranged on one side of the first baffle, a third motor 34 is arranged inside the second protection box, a third rotating rod 33 is arranged at the output end of the third motor 34, a first cable 8 is wound around the outer surface of the third rotating rod 33, a third protection box 9 is arranged at the other end of the second cable 7, a fourth motor 23 is arranged inside the third protection box 9, a bidirectional lead screw 21 is arranged at the output end of the fourth motor 23, a slider 22 is transmission-connected to the outer surface of the bidirectional lead screw 21, and a bottom of the slider 22 is provided. A hook 15 is tied with a cable, a slot 20 is provided on the inner bottom wall of the third protective box 9, a slider 22 is clamped in the slot 20, a fourth baffle is provided on the top of the upper cross beam 6, a fourth protective box is provided on one side of the fourth baffle, a fifth motor 31 is provided inside the fourth protective box, a sixth rotating rod 35 is provided at the output end of the fifth motor 31, a second cable 7 is wound around the outer surface of the sixth rotating rod 35, the other end of the second cable 7 is provided on the top of the third protective box 9, an oblique square hole is opened inside the upper cross beam 6, a fixed pulley 29 is provided inside the oblique square hole.

[0033] In order to realize the effect that the road and bridge gantry crane has the ability to adjust the distance between the two hooks 15, so as to be able to lift longer workpieces and enhance the stability of the device, as shown in the attached Figure 2 , Figure 4-5 and Figure 7 As shown, the present application adopts the following structure, through the cooperation of the fourth motor 23, the bidirectional screw 21, the slider 22, the hook 15, the third motor 34, the third rotating rod 33, the first cable 8, the fifth motor 31, the sixth rotating rod 35, the second cable 7, the third protective box 9, the fixed pulley 29, the upper beam 6 and the hook 15, during use, when a longer workpiece is to be hooked up, the fourth motor 23 is started by the controller, and the output end of the fourth motor 23 drives the bidirectional screw 21, the bidirectional screw 21 rotates and drives the slider 22 connected to the surface of the bidirectional screw 21, and the slider 22 drives the hook 15 to move along the direction of the slot 20. According to actual needs, the distance between the two hooks 15 is adjusted. When the crane hooks up the workpiece and rises, the output of the third motor 34 The third end rotates and drives the third rotating rod 33, so that the first cable 8 is wound around the third rotating rod 33 to lift the workpiece. In order to enhance the stability of the device and prevent the workpiece from shaking left and right when rising, the fifth motor 31 is started at the same time as the third motor 34 is started. The output end of the fifth motor 31 rotates and drives the sixth rotating rod 35, so that the second cable 7 is wound around the sixth rotating rod 35, so that the third protective box 9 is respectively subjected to a leftward and a rightward pulling force in the horizontal direction to prevent the workpiece from shaking left and right when rising. The fixed pulley 29 can avoid the friction between the second cable 7 and the upper crossbeam 6, thereby realizing that the gantry crane for road and bridge use has the ability to adjust the distance between the two hooks 15, thereby being able to lift longer workpieces and enhance the stability of the device.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gantry crane for road and bridge use, comprising a lower crossbeam, characterized in that: The top of the lower crossbeam is provided with a first protection box, the interior of the first protection box is provided with a first motor, the output end of the first motor is provided with a first bevel gear, the interior of the lower crossbeam is rotatably connected with a first rotating rod through a bearing, one end of the first rotating rod is provided with a second bevel gear, and the other end of the first rotating rod is provided with a first rotating shaft, the top of the lower crossbeam is fixedly connected with a first supporting leg through bolts, a pillar is provided inside the first supporting leg, a second motor is provided inside the pillar, a second rotating rod is provided at the output end of the second motor, a third bevel gear is sleeved on the outer surface of the second rotating rod, a lead screw is rotatably connected to the interior of the pillar through a bearing, a fourth bevel gear is provided at the bottom of the lead screw, the interior of the first supporting leg is plugged with a second supporting leg, the top of the second support is fixedly connected with an upper crossbeam through bolts, a first baffle is provided at the top of the upper crossbeam, a second protection box is provided on one side of the first baffle, a third motor is provided inside the second protection box, a third rotating rod is provided at the output end of the third motor, a first cable is wound around the outer surface of the third rotating rod, and a third protection box is provided at the other end of the second cable.

2. A gantry crane for road and bridge use according to claim 1, characterized in that: The first bevel gear and the second bevel gear are meshed, a second baffle is provided at the bottom of the lower cross beam, the interior of the second baffle is rotatably connected to a fourth rotating rod through a bearing, a second rotating shaft is provided at one end of the fourth rotating rod, a rotating belt is clamped in the groove of the second rotating shaft, the rotating belt is clamped in the groove of the first rotating shaft, and a roller brush is sleeved on the outer surface of the fourth rotating rod.

3. A road and bridge gantry crane according to claim 1, characterized in that: A third baffle is arranged at the bottom of the lower cross beam, a fifth rotating rod is rotatably connected to the interior of the third baffle via a bearing, and a wheel is sleeved on the outer surface of the fifth rotating rod.

4. A gantry crane for road and bridge use according to claim 1, characterized in that: The third bevel gear is meshed with the fourth bevel gear, and the lead screw is connected to the inside of the second supporting leg. Through holes are opened inside the first supporting leg, the second supporting leg and the pillar, and a fixing rod adapted to the inner diameter of the through hole is arranged inside the through hole.

5. A road and bridge gantry crane according to claim 1, characterized in that: A fourth motor is arranged inside the third protection box, a bidirectional lead screw is arranged at the output end of the fourth motor, a sliding block is transmission-connected to the outer surface of the bidirectional lead screw, and a hook is tied to the bottom of the sliding block via a cable.

6. A gantry crane for road and bridge use according to claim 1, characterized in that: The inner bottom wall of the third protection box is provided with a slot, and the sliding block is clamped inside the slot.

7. A road and bridge gantry crane according to claim 1, characterized in that: A fourth baffle is arranged on the top of the upper cross beam, a fourth protective box is arranged on one side of the fourth baffle, a fifth motor is arranged inside the fourth protective box, a sixth rotating rod is arranged at the output end of the fifth motor, a second cable is wound around the outer surface of the sixth rotating rod, and the other end of the second cable is arranged on the top of the third protective box.

8. A road and bridge gantry crane according to claim 1, characterized in that: An oblique square hole is provided inside the upper cross beam, and a fixed pulley is arranged inside the oblique square hole.

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