Turnable trolley and quay crane with annular girder

Abstract

The invention provides a turning trolley and a quay crane with an annular girder, the turning trolley comprises a frame assembly, the frame assembly comprises a bottom frame and two frames, the two frames are oppositely arranged on the bottom frame in the first direction, the annular girder is arranged between the two frames, and the bottom frame is located below the annular girder; one of the two pairs of wheel assemblies is arranged on the portion, located on the inner side of the annular girder, of the vehicle frame and is in sliding connection with the inner rail, the other pair of wheel assemblies is arranged on the portion, located on the outer side of the annular girder, of the vehicle frame and is in sliding connection with the outer rail, and the center distance between the pair of wheel assemblies on the outer rail is larger than that between the pair of wheel assemblies on the inner rail; each wheel assembly is driven by an independent driving piece; and the power connection assembly is arranged on the bottom frame and is electrically connected with the sliding contact line below the annular girder in a sliding mode, and the power connection assembly is electrically connected with all the driving pieces. The turning trolley can be suitable for the annular girder.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation machinery, and particularly relates to a turning trolley and a quay crane with a circular girder. Background Art

[0002] The trolley is one of the important mechanisms of a port container crane, undertaking the functions of horizontal movement, vertical lifting or lowering of containers. Its operation mode and layout form will affect the stability, efficiency and continuous operation ability of the whole machine. The existing trolleys of port container cranes can only operate singly on a straight track and move back and forth during loading and unloading operations. This operation mode has a low operation efficiency. In order to achieve higher operation efficiency, quay cranes with circular tracks have begun to be adopted in ports, and multiple trolleys operate continuously in a cycle on the circular track. However, the existing trolleys for straight tracks cannot correctly land on the circular track, cannot be applied to a double-row circular track, and cannot achieve turning and cornering. Therefore, there is an urgent need for a trolley that can be applied to a circular girder and can achieve rapid cornering with a small radius of curvature. Summary of the Invention

[0003] In view of this, the present invention provides a turning trolley that can be applied to a circular girder and can achieve rapid cornering with a small radius of curvature.

[0004] To solve at least one of the above technical problems, the present invention adopts the following technical solutions:

[0005] In a first aspect, the present invention provides a turning trolley for a quay crane with a circular girder. The circular girder includes an inner rail arranged on the inner side of the circular girder and an outer rail arranged on the outer side of the circular girder in sequence along the horizontal direction. The turning trolley includes:

[0006] A frame assembly, which includes a bottom frame and two frames. The two frames are oppositely arranged on the bottom frame along a first direction. The circular girder is arranged between the two frames and the bottom frame is located below the circular girder;

[0007] Two pairs of wheel assemblies. One pair of the two pairs of wheel assemblies is arranged on the frame located on the inner side of the circular girder and is slidably connected to the inner rail, and the other pair is arranged on the frame located on the outer side of the circular girder and is slidably connected to the outer rail. The center distance between the pair of wheel assemblies on the outer rail is greater than the center distance between the pair of wheel assemblies on the inner rail. Each wheel assembly can rotate for steering and is respectively driven by an independent driving member to travel along the inner rail or the outer rail;

[0008] A power connection assembly, which is arranged on the bottom frame and is slidably and electrically connected to the sliding contact wire below the circular girder, and the power connection assembly is electrically connected to each driving member respectively.

[0009] In an embodiment of the present invention, the bottom frame includes:

[0010] Two end beams, the two end beams are arranged opposite to each other along a first direction, each frame is respectively arranged on the corresponding end beam, and each end beam is respectively provided with a lifting mechanism;

[0011] Two connecting beams are used to be respectively arranged between the two end beams and respectively connected with the two end beams.

[0012] In one embodiment of the present invention, each frame comprises:

[0013] Two legs, the two legs are arranged along the vertical direction and are relatively distributed on the corresponding end beams along the second direction;

[0014] A main beam, which is arranged between the two legs and connected to the two legs respectively;

[0015] The second direction is perpendicular to the first direction, and both the second direction and the first direction are perpendicular to the vertical direction.

[0016] In one embodiment of the present invention, the bottoms of the two legs are connected to the corresponding end beams, and the main beam of each frame is arranged at the upper end of the corresponding two legs on one side facing the other frame, and the main beam is detachably connected to the two legs through two connecting flanges.

[0017] In one embodiment of the present invention, each wheel assembly comprises:

[0018] A universal wheel, which is arranged below the main beam and rotatably connected to the main beam through a turntable so that the universal wheel can rotate freely, and the universal wheel is connected to a corresponding driving member, which is used to drive the universal wheel to move, and the driving member is arranged on a corresponding turntable;

[0019] Wherein, the center distance between a pair of universal wheels on the outer rail is greater than the center distance between a pair of universal wheels on the inner rail.

[0020] In one embodiment of the present invention, a limit assembly is provided on each leg, and the limit assembly is provided below the corresponding universal wheel. The limit assembly is used to cooperate with the wing plate on the rail beam of the inner rail or the outer rail to perform guide limitation.

[0021] In one embodiment of the present invention, the limiting assembly includes:

[0022] A mounting bracket connected to a corresponding leg;

[0023] A horizontal wheel, which is arranged on a mounting bracket and is used to cooperate with the side of the wing plate on the rail-bearing beam of the inner rail or the outer rail, which is away from the annular beam;

[0024] The anti-roller is arranged on the mounting bracket and is located below the horizontal wheel. The anti-roller is used for corresponding and cooperating with the lower surface of the upper wing plate of the rail supporting beam of the inner rail or the outer rail.

[0025] In an embodiment of the present invention, there is a gap between the horizontal wheel and the side surface of the upper wing plate of the rail supporting beam of the inner rail or the outer rail that deviates from the annular girder, and the gap is adjustable. There is a gap between the anti-roller and the lower surface of the upper wing plate of the rail supporting beam of the inner rail or the outer rail, and the distance is adjustable.

[0026] In an embodiment of the present invention, the power connection assembly includes:

[0027] A carbon brush holder, which is arranged on one of the connecting beams;

[0028] A carbon brush, which is arranged on the carbon brush holder. The carbon brush is in sliding electrical connection with the sliding contact wire below the annular girder and is electrically connected to each driving member.

[0029] In a second aspect, the present invention also provides a quay crane with an annular girder, including the turnable trolley described in any one of the above embodiments.

[0030] At least one of the above technical solutions of the present invention has the following beneficial effects:

[0031] For the turnable trolley of the present invention, by respectively arranging a pair of wheel assemblies on the vehicle frame inside the annular girder and the vehicle frame outside the annular girder, the wheelbases (the center distance between a pair of wheel assemblies) on the inner and outer sides are asymmetric, and the outer rail wheelbase is greater than the inner rail wheelbase, so that the wheel turning trajectory completely coincides with the track curve. Each wheel assembly can rotate for steering and is respectively driven by an independent driving member to travel along the inner rail or the outer rail. Therefore, differential turning can be achieved by controlling the rotational speed and torque of each wheel assembly, solving the problem of wheel slipping caused by the arc length difference between the inner and outer rails, and improving the stability and smoothness of the trolley when turning quickly at a small radius of curvature. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of the turnable trolley traveling along the annular girder in some embodiments of the present invention;

[0033] Figure 2 It is a schematic structural diagram of the turnable trolley in some embodiments of the present invention;

[0034] Figure 3 It is a front view of the turnable trolley in some embodiments of the present invention;

[0035] Figure 4 It is a partial structural diagram of the inner side of the turnable trolley in some embodiments of the present invention.

[0036] Reference numerals:

[0037] 100, Ring-shaped main girder; 110, Inner rail; 120, Outer rail;

[0038] 200, Frame assembly; 210, Bottom frame; 211, End beam; 212, Connecting beam; 213, Lifting mechanism; 220, Frame; 221, Leg; 222, Main beam;

[0039] 300, Wheel assembly; 301, Driving part; 310, Universal wheel; 311, Turntable;

[0040] 400, Power connection assembly; 410, Carbon brush holder; 420, Carbon brush;

[0041] 500, Limit assembly; 510, Mounting bracket; 520, Horizontal wheel; 530, Anti-roller. Detailed implementation manners

[0042] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention fall within the scope of protection of the present invention.

[0043] First, a turnable trolley according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

[0044] As Figure 1 shown, the turnable trolley of the embodiment of the present invention can be used for a quay crane with a ring-shaped main girder 100, and the ring-shaped main girder 100 includes an inner rail 110 arranged inside the ring-shaped main girder 100 and an outer rail 120 arranged outside the ring-shaped main girder 100 in sequence along the horizontal direction. Specifically, as Figure 2 and Figure 3As shown in the figure, the steerable trolley includes: a frame assembly 200, two pairs of wheel assemblies 300, and a power connection assembly 400. Among them, the frame assembly 200 includes a bottom frame 210 and two frames 220. The two frames 220 are arranged oppositely along the first direction on the bottom frame 210. The annular girder 100 is arranged between the two frames 220 and the bottom frame 210 is located below the annular girder 100. One pair of the two pairs of wheel assemblies 300 is arranged on the frame 220 inside the annular girder 100 and is slidably connected to the inner rail 110, and the other pair is arranged on the frame 220 outside the annular girder 100 and is slidably connected to the outer rail 120. The center distance between the pair of wheel assemblies 300 on the outer rail 120 is greater than the center distance between the pair of wheel assemblies 300 on the inner rail 110. Each wheel assembly 300 can rotate for steering and is respectively driven by an independent driving member 301 to travel along the inner rail 110 or the outer rail 120. The power connection assembly 400 is arranged on the bottom frame 210 and is slidably and electrically connected to the trolley wire below the annular girder 100, and the power connection assembly 400 is electrically connected to each driving member 301 respectively.

[0045] In this embodiment, the inner rail 110 inside the annular girder 100 and the outer rail 120 outside the annular girder 100 both include a straight section and an arc section. The straight sections of the inner rail 110 and the outer rail 120 are parallel, the arc sections are concentric, and the straight section is tangent to the arc section. In order to quickly and smoothly pass through the arc section, in the present invention, a pair of wheel assemblies 300 are respectively arranged on the frame 220 inside the annular girder 100 and the frame 220 outside the annular girder 100. Each wheel assembly 300 can rotate with the vertical direction as the rotation axis so as to be able to steer. At the same time, each wheel assembly 300 is respectively driven by an independent driving member 301 to travel along the inner rail 110 or the outer rail 120, so that differential turning can be achieved by controlling the rotational speed and torque of each wheel assembly 300. In addition, the center distance between the pair of wheel assemblies 300 on the outer rail 120 is greater than the center distance between the pair of wheel assemblies 300 on the inner rail 110, so that the pair of wheel assemblies 300 on the outer rail 120 can travel a longer distance than the pair of wheel assemblies 300 on the inner rail 110 in the same time, so that a small radius of curvature turn can be carried out and the slip or instability phenomenon caused by the wheel speed difference during turning can be reduced, and the stability and smoothness of the trolley during a small radius of curvature rapid turn are improved.

[0046] As Figure 2 and Figure 3As shown, the bottom frame 210 includes: two end beams 211 and two connecting beams 212. Among them, the two end beams 211 are arranged oppositely along the first direction, each vehicle frame 220 is respectively arranged on its corresponding end beam 211, and a lifting mechanism 213 is respectively arranged on each end beam 211; the two connecting beams 212 are respectively arranged between the two end beams 211 and are respectively connected to the two end beams 211.

[0047] In this embodiment, the two end beams 211 are parallel to each other and their length directions are consistent with the second direction, the two connecting beams 212 are parallel to each other and their length directions are consistent with the first direction. Among them, the second direction is perpendicular to the first direction, and both the second direction and the first direction are perpendicular to the vertical direction. The connection of the two end beams 211 and the two connecting beams 212 can form a rectangular frame, thereby improving the structural strength of the bottom frame 210. In addition, the end beam 211 has an overhanging structure, so that the lifting mechanism 213 can be installed.

[0048] As Figure 2 and Figure 3 shown, each vehicle frame 220 respectively includes: two legs 221 and a main beam 222. Among them, the two legs 221 are arranged along the vertical direction and are distributed oppositely along the second direction on the corresponding end beam 211; the main beam 222 is arranged between the two legs 221 and is respectively connected to the two legs 221.

[0049] In this embodiment, the main beams 222 of the two vehicle frames 220 are arranged parallel and opposite to each other, and the length direction of each main beam 222 is consistent with the second direction. The bottoms of the two legs 221 are connected to the corresponding end beam 211, and the main beam 222 of each vehicle frame 220 is arranged at the upper end of the corresponding two legs 221 on the side facing the other vehicle frame 220. The main beam 222 is detachably connected to the two legs 221 through two connecting flanges, and the horizontal distance between the main beam 222 and the two legs 221 can be adjusted by adding or reducing gaskets at the connecting flanges, thereby adjusting the distance between the wheel assembly 300 and the outer rail 120 or the inner rail 110, ensuring the connection between the wheel assembly 300 and the outer rail 120 or the inner rail 110, and thus facilitating the row installation.

[0050] As Figure 2 and Figure 3 shown, each wheel assembly 300 respectively includes: a universal wheel 310. The universal wheel 310 is arranged below the main beam 222 and is rotationally connected to the main beam 222 through a turntable 311 to enable the universal wheel 310 to rotate freely. The universal wheel 310 is connected to the corresponding driving member 301, and the driving member 301 is used to drive the universal wheel 310 to move. The driving member 301 is arranged on the corresponding turntable 311; among them, the center distance between a pair of universal wheels 310 on the outer rail 120 is greater than the center distance between a pair of universal wheels 310 on the inner rail 110.

[0051] In this embodiment, the rotating shaft of the turntable 311 is aligned with the vertical direction, so that the universal wheel 310 can rotate, enabling the turnable trolley to turn when passing through the arc section. At the same time, each universal wheel 310 is driven by an independent driving member 301 respectively, so that each universal wheel 310 travels along the inner rail 110 or the outer rail 120. Thus, the speed and torque of each universal wheel 310 can be controlled by the driving member 301 to achieve differential turning, solving the problem of wheel slip caused by the arc length difference between the inner and outer rails. In addition, the center distance between a pair of universal wheels 310 on the outer rail 120 is greater than the center distance between a pair of universal wheels 310 on the inner rail 110, that is, the base distances (the center distance between a pair of wheel assemblies) on the inner and outer sides are asymmetric, and the outer rail base distance is greater than the inner rail base distance, making the wheel turning trajectory completely coincide with the track curve. This improves the stability and smoothness of the trolley when quickly turning at a small radius of curvature.

[0052] As Figure 3 and Figure 4 shown, a limiting component 500 is arranged on each leg 221. The limiting component 500 is arranged below the corresponding universal wheel 310 and is used for corresponding cooperation with the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 for guiding and limiting. Specifically, the limiting component 500 may include: a mounting bracket 510, a horizontal wheel 520, and a counter roller 530. Among them, the mounting bracket 510 is connected to the corresponding leg 221; the horizontal wheel 520 is arranged on the mounting bracket 510, and the horizontal wheel 520 is used for corresponding cooperation with the side surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 facing away from the annular girder 100; the counter roller 530 is arranged on the mounting bracket 510 and is located below the horizontal wheel 520, and the counter roller 530 is used for corresponding cooperation with the lower surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120.

[0053] In this embodiment, when the turnable trolley is skewed, the horizontal wheel 520 can be used as a guiding device to abut against and rotate with the side surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120, avoiding the wheel flange of the universal wheel 310 from gnawing the rail and premature wear. When the turnable trolley turns, if one side universal wheel 310 lifts, the counter roller 530 can be used as a safety device to lift up and abut against the lower surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120, pressing against the upper wing plate of the rail supporting beam above it to prevent the turnable trolley from tipping over. Thus, the safety of the turnable trolley when quickly passing through the arc section is effectively improved.

[0054] As Figure 3 and Figure 4As shown, there is a spacing between the horizontal wheel 520 and the side surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 facing away from the annular main beam 100, and the spacing is adjustable. There is also a spacing between the reverse roller 530 and the lower surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120, and the distance is adjustable. Thus, when there are manufacturing errors or assembly errors, the spacing between the horizontal wheel 520 and the side surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 facing away from the annular main beam 100 or the spacing between the reverse roller 530 and the lower surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 can be adjusted. Specifically, the mounting bracket 510 can be connected to the leg 221 through a flange, and the spacing between the horizontal wheel 520 and the side surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 facing away from the annular main beam 100 can be adjusted by adding or reducing gaskets at the flange. And a waist-shaped hole extending in the vertical direction is provided on one side of the mounting bracket 510 facing the inner rail 110 or the outer rail 120, and the spacing between the reverse roller 530 and the lower surface of the upper wing plate of the rail supporting beam of the inner rail 110 or the outer rail 120 can be adjusted by adjusting the position of the reverse roller 530 in the waist-shaped hole.

[0055] As Figure 3 shown, the power connection assembly 400 includes: a carbon brush bracket 410 and a carbon brush 420. Among them, the carbon brush bracket 410 is arranged on one of the connecting beams 212; the carbon brush 420 is arranged on the carbon brush bracket 410, and the carbon brush 420 is in sliding electrical connection with the sliding contact wire below the annular main beam 100 and is electrically connected to each driving member 301. Thus, by using the carbon brush 420 to make sliding contact with the sliding contact wire throughout the process, a closed-loop continuous and stable power supply for the turnable trolley can be achieved.

[0056] In a second aspect, the present invention also provides a quay crane with an annular main beam, including the turnable trolley described in any one of the above embodiments.

[0057] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those of ordinary skill in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0058] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A turnable trolley, characterized in that, For a quay crane with a ring-shaped main girder, the ring-shaped main girder includes an inner rail arranged in sequence along the horizontal direction on the inner side of the ring-shaped main girder and an outer rail on the outer side of the ring-shaped main girder. The turnable trolley includes: A frame assembly, the frame assembly includes a bottom frame and two carriages. The two carriages are arranged oppositely on the bottom frame along a first direction. The ring-shaped main girder is arranged between the two carriages and the bottom frame is located below the ring-shaped main girder; Two pairs of wheel assemblies. One pair of the two pairs of wheel assemblies is arranged on the carriage located on the inner side of the ring-shaped main girder and is slidably connected to the inner rail. The other pair is arranged on the carriage located on the outer side of the ring-shaped main girder and is slidably connected to the outer rail. The center distance between the pair of wheel assemblies on the outer rail is greater than the center distance between the pair of wheel assemblies on the inner rail. Each wheel assembly can rotate for steering and is respectively driven by an independent driving member to travel along the inner rail or the outer rail; A power connection assembly, the power connection assembly is arranged on the bottom frame and is slidably and electrically connected to the sliding contact wire below the ring-shaped main girder, and the power connection assembly is electrically connected to each driving member respectively.

2. The steerable trolley according to claim 1, wherein, The bottom frame includes: Two end beams, the two end beams are arranged oppositely along the first direction. Each carriage is respectively arranged on its corresponding end beam, and a hoisting mechanism is respectively arranged on each end beam; Two connecting beams, the two connecting beams are respectively used to be arranged between the two end beams and are respectively connected to the two end beams.

3. The turnable trolley according to claim 2, wherein Each carriage respectively includes: Two legs, the two legs are arranged vertically and are distributed oppositely along a second direction on the corresponding end beam; A main beam, the main beam is arranged between the two legs and is respectively connected to the two legs; Wherein, the second direction is perpendicular to the first direction, and both the second direction and the first direction are perpendicular to the vertical direction.

4. The turnable trolley according to claim 3, wherein The bottoms of the two legs are connected to the corresponding end beam. The main beam of each carriage is arranged at the upper end of the corresponding two legs on the side facing the other carriage. The main beam is detachably connected to the two legs through two connecting flanges.

5. The turnable trolley according to claim 4, wherein Each wheel assembly respectively includes: A universal wheel, the universal wheel is arranged below the main beam and is rotatably connected to the main beam through a turntable so that the universal wheel can rotate freely. The universal wheel is connected to the corresponding driving member, and the driving member is used to drive the universal wheel to move. The driving member is arranged on the corresponding turntable; Wherein, the center distance between the pair of universal wheels on the outer rail is greater than the center distance between the pair of universal wheels on the inner rail.

6. The turnable trolley according to claim 5, wherein, A limiting assembly is arranged on each leg. The limiting assembly is arranged below the corresponding universal wheel. The limiting assembly is used to cooperate with the upper wing plate of the rail supporting beam of the inner rail or the outer rail for guiding and limiting.

7. The turnable trolley according to claim 6, wherein, The limiting assembly includes: A mounting bracket, the mounting bracket is connected to the corresponding leg; A horizontal wheel, the horizontal wheel is arranged on the mounting bracket, and the horizontal wheel is used to cooperate with the side of the wing plate on the rail-bearing beam of the inner rail or the outer rail facing away from the annular beam; A reverse roller is arranged on the mounting bracket and is located below the horizontal wheel. The reverse roller is used to correspond to and cooperate with the lower surface of the upper wing plate of the track-bearing beam of the inner rail or the outer rail.

8. The turnable trolley according to claim 7, wherein There is an adjustable spacing between the horizontal wheel and the side of the wing plate on the track beam of the inner rail or the outer rail facing away from the annular beam, and there is an adjustable spacing between the reverse roller and the lower surface of the wing plate on the track beam of the inner rail or the outer rail.

9. The turnable trolley according to claim 2, wherein The power connection assembly comprises: A carbon brush holder, the carbon brush holder being arranged on one of the connecting beams; A carbon brush is arranged on the carbon brush bracket, and the carbon brush is electrically connected to the busbar below the annular beam in a sliding manner and is electrically connected to each of the driving members.

10. A quay crane with a ring-shaped main girder, characterized in that, A turnable vehicle comprising the turnable vehicle described in any one of claims 1-9.

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