Trolley towing device and shore crane

Abstract

The application provides a trolley traction device and a shore bridge, and relates to the field of hoisting technology. The trolley traction device comprises a trolley running winch, a first deflection wheel assembly, a second deflection wheel assembly, a first steering wheel assembly and a second steering wheel assembly. The first deflection wheel assembly and the second deflection wheel assembly are arranged on the sea measurement of the trolley running winch, so that the first traction rope and the second traction rope are both output from the sea measurement of the trolley running winch. In this way, the trolley running winch is arranged on the upper portion of the machine room chassis, and a sunken chassis does not need to be arranged on the bottom of the machine room chassis, so that the manufacturing difficulty of the machine room chassis is simplified. After the trolley running winch is arranged on the upper portion of the machine room chassis, a guardrail does not need to be arranged around the trolley running winch, the space utilization of the machine room is effectively improved, the size of the machine room is reduced, and the production cost of the machine room is reduced.

Description

Technical Field

[0001] The present invention relates to the field of lifting technology, and in particular to a trolley traction device and a quay crane. Background Art

[0002] At present, in order to facilitate the trolley to pull the wire rope out from the front and rear sides of the machine room, most of the quay cranes are equipped with a trolley traction mechanism that is arranged on a sunken base frame of the machine room. This can avoid interference between the wire rope and the machine room base frame.

[0003] However, the trolley traction mechanism is arranged on a sunken chassis. Firstly, it increases the manufacturing difficulty of the entire machine room chassis. Secondly, the trolley traction mechanism is not coplanar with the main plane of the chassis, which increases the workload of the subsequent installation of the entire mechanism. Thirdly, the maintenance space and convenience of the entire mechanism are limited on the sunken chassis. Summary of the Invention

[0004] The present invention provides a trolley traction device, which is used to solve the problems in the prior art of difficulty in manufacturing a machine room chassis and inconvenience in installing and maintaining the trolley traction mechanism.

[0005] The present invention provides a trolley traction device, comprising:

[0006] A machine room, wherein the lower portion of the chassis of the machine room is flat;

[0007] A trolley running drum, the trolley running drum is arranged on the upper part of the chassis of the machine room, and a first traction rope and a second traction rope are respectively wound around the outer circumference of the trolley running drum in opposite directions;

[0008] A first redirecting wheel assembly, the first redirecting wheel assembly being arranged on the sea surface of the trolley running drum;

[0009] A second redirecting wheel assembly, the second redirecting wheel assembly being arranged on the sea surface of the trolley running drum;

[0010] The first steering wheel assembly and the second steering wheel assembly are arranged at both ends of the beam in a one-to-one correspondence; the first traction rope is output from the sea side of the trolley running drum, and is connected to the sea side of the trolley after passing through the first redirecting wheel assembly and the first steering wheel assembly in sequence; the second traction rope is output from the sea side of the trolley running drum, and is connected to the land side of the trolley after passing through the second redirecting wheel assembly and the second steering wheel assembly in sequence.

[0011] According to the trolley traction device provided by the application, the first deflection wheel assembly comprises two first deflection wheel groups, the two first deflection wheel groups are arranged in a length direction of the trolley running drum, and two first traction ropes output by the trolley running drum are wound on the two first deflection wheel groups one by one.

[0012] According to the trolley traction device provided by the application, the first deflection wheel assembly comprises a first upper deflection wheel and a first lower deflection wheel, the first upper deflection wheel is arranged above the first lower deflection wheel, and the first traction rope output by the trolley running drum is wound on the first upper deflection wheel and the first lower deflection wheel one by one.

[0013] According to the trolley traction device provided by the application, the first upper deflection wheel and the first lower deflection wheel are in the same vertical plane, and the center of the first upper deflection wheel and the center of the first lower deflection wheel are in the same vertical line.

[0014] According to the trolley traction device provided by the application, the second deflection wheel assembly comprises two second deflection wheel groups, the two second deflection wheel groups are arranged in a length direction of the trolley running drum, and two second traction ropes output by the trolley running drum are wound on the two second deflection wheel groups one by one; and the two second deflection wheel groups are located between the two first deflection wheel groups.

[0015] According to the trolley traction device provided by the application, the second deflection wheel assembly comprises a second upper deflection wheel and a second lower deflection wheel, the second upper deflection wheel is arranged above the second lower deflection wheel, and the second traction rope output by the trolley running drum is wound on the second upper deflection wheel and the second lower deflection wheel one by one.

[0016] According to the trolley traction device provided by the application, the second upper deflection wheel and the second lower deflection wheel are in the same vertical plane, and the center of the second upper deflection wheel and the center of the second lower deflection wheel are in the same vertical line.

[0017] According to the trolley traction device provided by the application, the height of the second upper deflection wheel is less than the height of the first upper deflection wheel, and the height of the second lower deflection wheel is equal to the height of the first lower deflection wheel.

[0018] According to the trolley traction device provided by the application, the trolley traction device further comprises:

[0019] The tension adjusting assembly is connected with the first upper deflection wheel or the second deflection wheel assembly, and is used for adjusting the distance between the first upper deflection wheel or the second deflection wheel assembly and the trolley running drum, so as to adjust the tension of the first traction rope or the second traction rope.

[0020] The present invention also provides a quay crane, comprising a beam, a pitching mechanism and any one of the above-mentioned trolley traction devices, wherein the machine room is arranged on the beam; the pitching mechanism is arranged on the upper part of the chassis of the machine room and is located on the land side of the trolley running drum.

[0021] The trolley traction device provided by the present invention respectively arranges a first redirecting wheel assembly and a second redirecting wheel assembly on the sea side of the trolley running drum, so that the first traction rope and the second traction rope are both output from the sea side of the trolley running drum. With such an arrangement, the trolley running drum can be arranged on the upper part of the machine room base frame, and there is no need to arrange a sunken base frame at the bottom of the machine room base frame, which simplifies the manufacturing difficulty of the machine room base frame; since the trolley running drum is arranged on the upper part of the machine room base frame, there is no need to arrange a guardrail around the trolley running drum, which effectively improves the space utilization rate of the machine room, thereby reducing the volume of the machine room and reducing the production cost of the machine room. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is one of the three-dimensional structural schematic diagrams of the trolley traction device provided by the present invention.

[0024] Figure 2 It is a side sectional structural diagram of the machine room provided by the present invention.

[0025] Figure 3 This is the second schematic diagram of the three-dimensional structure of the trolley traction device provided by the present invention.

[0026] Figure 4 It is a structural schematic diagram of the quay crane provided by the present invention.

[0027] Reference numerals:

[0028] 100. Trolley running drum; 110. First traction rope; 120. Second traction rope; 200. First redirecting wheel assembly; 210. First upper redirecting wheel; 220. First lower redirecting wheel; 300. Second redirecting wheel assembly; 310. Second upper redirecting wheel; 320. Second lower redirecting wheel; 400. First steering wheel assembly; 410. First steering wheel; 500. Second steering wheel assembly; 510. Second steering wheel; 600. Tensioning adjustment assembly; 700. Trolley; 710. Guide wheel; 800. Pitch mechanism; 900. Machine room; 910. Beam. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0032] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature is "above", "over" and "on" the second feature, which can be that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. The first feature is "under", "below" and "under" the second feature, which can be that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0033] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0034] The specific structure and working principle of the trolley traction device of the present application will be described below. Figure 1-Figure 3 The specific structure and working principle of the trolley traction device of the present application will be described below.

[0035] As shown in Figure 1 The trolley traction device comprises a machine house 900, a trolley running drum 100, a first deflection wheel assembly 200, a second deflection wheel assembly 300, a first steering wheel assembly 400 and a second steering wheel assembly 500. The lower part of the chassis of the machine house 900 is flat, the trolley running drum 100 is arranged on the upper part of the chassis of the machine house 900, and the outer periphery of the trolley running drum 100 is wound with a first traction rope 110 and a second traction rope 120 in opposite directions respectively; the first deflection wheel assembly 200 is arranged on the sea side of the trolley running drum 100; the second deflection wheel assembly 300 is arranged on the sea side of the trolley running drum 100; the first steering wheel assembly 400 and the second steering wheel assembly 500 are arranged one by one at the two ends of the girder 910; the first traction rope 110 is output from the sea side of the trolley running drum 100, and then passes through the first deflection wheel assembly 200 and the first steering wheel assembly 400 to be connected with the sea side of the trolley 700; the second traction rope 120 is output from the sea side of the trolley running drum 100, and then passes through the second deflection wheel assembly 300 and the second steering wheel assembly 500 to be connected with the land side of the trolley 700.

[0036] The trolley traction device provided by the application has the following advantages: the first traction rope 110 and the second traction rope 120 are both output from the sea side of the trolley running drum 100 by arranging the first deflection wheel assembly 200 and the second deflection wheel assembly 300 on the sea side of the trolley running drum 100, so that the trolley running drum 100 can be arranged on the upper part of the machine room chassis, and a sunken chassis does not need to be arranged on the bottom of the machine room chassis, thereby simplifying the manufacturing difficulty of the machine room chassis; after the trolley running drum 100 is arranged on the upper part of the machine room chassis, a guardrail does not need to be arranged around the trolley running drum 100, thereby effectively improving the space utilization of the machine room 900, and the volume of the machine room 900 can be reduced, and the production cost of the machine room 900 can be reduced.

[0037] In an embodiment of the application, as shown in Figure 1 , the trolley running drum 100 is located above the movement track of the trolley 700, and the trolley running drum 100 is perpendicular to the movement track of the trolley 700. The first traction rope 110 is output from the upper part of the sea side of the trolley running drum 100, and the second traction rope 120 is output from the lower part of the sea side of the trolley running drum 100. No matter whether the trolley running drum 100 rotates forward or reversely, one of the first traction rope 110 and the second traction rope 120 is wound around the outer periphery of the trolley running drum 100, and the other of the first traction rope 110 and the second traction rope 120 is released from the outer periphery of the trolley running drum 100.

[0038] In an embodiment of the application, as shown in Figure 1 , the first deflection wheel assembly 200 includes two first deflection wheel groups, the two first deflection wheel groups are arranged in a length direction of the trolley running drum 100, the distance between the two first deflection wheel groups is greater than the distance between the two second deflection wheel groups, and the two first deflection wheel groups are parallel and symmetrically arranged. The two first traction ropes 110 output by the trolley running drum 100 are correspondingly wound around the two first deflection wheel groups. Specifically, the first traction rope 110 extends towards the sea side of the trolley running drum 100 after winding around the corresponding first deflection wheel group, and then extends towards the land side of the trolley running drum 100 after winding around the first deflection wheel assembly 400. The first traction rope 110 between the first deflection wheel group and the trolley running drum 100 forms an acute angle with the horizontal plane, and of course, the first traction rope 110 can also be in a horizontal state.

[0039] It should be noted that the first deflection wheel group is connected with the girder 910, and the distance between the first deflection wheel group and the trolley running drum 100 is determined according to the position of the trolley running drum 100 on the machine room chassis.

[0040] In an embodiment of the application, as shown in Figure 1 and Figure 2As shown, the first redirecting wheel group includes a first upper redirecting wheel 210 and a first lower redirecting wheel 220. The first upper redirecting wheel 210 is arranged above the first lower redirecting wheel 220. The first upper redirecting wheel 210 and the first lower redirecting wheel 220 are both rotated in conjunction with the beam 910. The first traction rope 110 outputted from the trolley running drum 100 passes around the first upper redirecting wheel 210 and the first lower redirecting wheel 220 in sequence. The first traction rope 110 outputted from the trolley running drum 100 first passes around the first upper redirecting wheel 210, and the first traction rope 110 changes from horizontal motion to downward motion. After the first traction rope 110 passes around the first lower redirecting wheel 220, the first traction rope 110 changes from downward motion to seaward motion toward the trolley running drum 100 (i.e., toward the seaward direction). Figure 1 This ensures that there is a certain distance between the first traction rope 110 between the first steering wheel assembly 400 and the first lower redirecting wheel 220 and the machine room chassis, thereby preventing the first traction rope 110 between the first steering wheel assembly 400 and the first lower redirecting wheel 220 from interfering with the machine room chassis.

[0041] In one embodiment of the present invention, Figure 1 As shown, the first upper bend wheel 210 and the first lower bend wheel 220 are in the same vertical plane, which can prevent wear of the first traction rope 110, the first upper bend wheel 210, and the first lower bend wheel 220, thereby extending the service life of the first traction rope 110. The center of the first upper bend wheel 210 and the center of the first lower bend wheel 220 are in the same vertical line, so that the first traction rope 110 between the first upper bend wheel 210 and the first lower bend wheel 220 is in an inclined state; of course, in order to keep the first traction rope 110 between the first upper bend wheel 210 and the first lower bend wheel 220 in a vertical state, the center of the first upper bend wheel 210 and the center of the first lower bend wheel 220 may not be in the same vertical line.

[0042] In one embodiment of the present invention, Figure 1 As shown, the second bendable wheel assembly 300 includes two second bendable wheel assemblies spaced apart along the length of the trolley running drum 100, with the two second bendable wheel assemblies located between the two first bendable wheel assemblies. The two second bendable wheel assemblies are arranged parallel and symmetrically, with the two first bendable wheel assemblies being equidistant from their corresponding first bendable wheel assemblies. The two second traction ropes 120 output from the trolley running drum 100 are wound around the two second bendable wheel assemblies in a one-to-one correspondence. Specifically, the second traction ropes 120 pass around the corresponding second bendable wheel assemblies, extending toward the land side of the trolley running drum 100. After passing around the second steering wheel assembly 500, they extend toward the sea side of the trolley running drum 100. The second traction ropes 120 between the second bendable wheel assemblies and the trolley running drum 100 are horizontal, or may form an acute angle with the horizontal plane.

[0043] It should be noted here that the second redirecting wheel set is connected to the beam 910, and the distance between the second redirecting wheel set and the trolley running drum 100 is specifically determined according to the position of the trolley running drum 100 on the machine room chassis.

[0044] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the second redirecting wheel group includes a second upper redirecting wheel 310 and a second lower redirecting wheel 320. The second upper redirecting wheel 310 is arranged above the second lower redirecting wheel 320. The second upper redirecting wheel 310 and the second lower redirecting wheel 320 are both rotatably coordinated with the beam 910. The second traction rope 120 outputted from the trolley running drum 100 passes around the second upper redirecting wheel 310 and the second lower redirecting wheel 320 in sequence. The second traction rope 120 outputted from the trolley running drum 100 first passes around the second upper redirecting wheel 310, and the second traction rope 120 changes from horizontal movement to downward movement. After the second traction rope 120 passes around the second lower redirecting wheel 320, the second traction rope 120 changes from downward movement to movement toward the land side of the trolley running drum 100 (i.e., toward the land side). Figure 1 This ensures that there is a certain distance between the second traction rope 120 between the second lower redirecting wheel 320 and the second steering wheel assembly 500 and the machine room chassis, thereby preventing the second traction rope 120 between the second lower redirecting wheel 320 and the second steering wheel assembly 500 from interfering with the machine room chassis.

[0045] In one embodiment of the present invention, Figure 1 As shown, the second upper bend wheel 310 and the second lower bend wheel 320 are located in the same vertical plane. This prevents wear and tear between the second traction rope 120, the second upper bend wheel 310, and the second lower bend wheel 320, thereby extending the service life of the second traction rope 120. The center of the second upper bend wheel 310 and the center of the second lower bend wheel 320 are located on the same vertical line, so that the second traction rope 120 between the second upper bend wheel 310 and the second lower bend wheel 320 is in an inclined state. Of course, in order to keep the second traction rope 120 between the second upper bend wheel 310 and the second lower bend wheel 320 in a vertical state, the center of the second upper bend wheel 310 and the center of the second lower bend wheel 320 do not need to be located on the same vertical line.

[0046] In one embodiment of the present invention, the second upper bend pulley 310 is disposed parallel to the first upper bend pulley 210. The height of the second upper bend pulley 310 is less than that of the first upper bend pulley 210, i.e., the height of the highest point of the rope groove of the second upper bend pulley 310 is less than that of the first upper bend pulley 210. The height of the second lower bend pulley 320 is equal to that of the first lower bend pulley 220, and the central axis of the second lower bend pulley 320 is collinear with the central axis of the first lower bend pulley 220.

[0047] In one embodiment of the present invention, two guide wheels 710 are provided on both sides of the trolley 700, and the two guide wheels 710 are spaced apart along the length direction of the trolley running drum 100. Of course, the number of guide wheels 710 on each side of the trolley 700 is not limited thereto and is specifically determined according to the number of traction ropes.

[0048] In one embodiment of the present invention, Figure 1 As shown, the first steering wheel assembly 400 includes two first steering wheels 410, which are disposed at one end of the main beam 910 near the sea surface. The two first steering wheels 410 are spaced apart along the length of the trolley running drum 100, are vertically disposed, and both first steering wheels 410 are rotatably coupled to the main beam 910. The distance between the two first steering wheels 410 is equal to the distance between the two first lower redirecting wheels 220. The two first traction ropes 110 pass around the corresponding first lower redirecting wheels 220, then around the corresponding first steering wheels 410, and finally around the guide wheels 710 on the sea surface of the trolley 700 before being connected to each other.

[0049] In one embodiment of the present invention, Figure 1 As shown, the second steering wheel assembly 500 includes two second steering wheels 510, which are disposed at the landward end of the main beam 910. The two second steering wheels 510 are spaced apart along the length of the trolley running drum 100, are vertically disposed, and are rotatably coupled to the main beam 910. The distance between the two second steering wheels 510 is equal to the distance between the two second lower redirecting wheels 320. The two second traction ropes 120 pass around the corresponding second lower redirecting wheels 320, then around the corresponding second steering wheels 510, and finally around the guide wheels 710 on the landward side of the trolley 700 before being connected to each other.

[0050] In one embodiment of the present invention, Figure 1 As shown, the trolley traction device also includes a tensioning adjustment assembly 600, which is connected to the first upper redirecting wheel 210 or the second steering wheel assembly 500. The tensioning adjustment assembly 600 is used to adjust the distance from the first upper redirecting wheel 210 or the second steering wheel assembly 500 to the trolley running drum 100 to adjust the tension of the first traction rope 110 or the second traction rope 120.

[0051] In one embodiment of the present invention, Figure 1As shown, the tension adjusting assembly 600 includes a cylinder, the cylinder is located at the land side of the trolley running drum 100, the cylinder body is connected with the cross beam of the beam 910, the second steering wheel 510 can slide along the length direction of the beam 910 relative to the beam 910, the telescopic rod of the cylinder is connected with the second steering wheel 510, the cylinder drives the second steering wheel 510 to slide along the length direction of the beam 910, thereby adjusting the tension of the second traction rope 120. Preferably, the tension adjusting assembly 600 includes two cylinders, the telescopic rods of the two cylinders are connected with the two second steering wheels 510 one by one, and the tension of the two second traction ropes 120 can be adjusted separately by the two cylinders.

[0052] In an embodiment of the present application, as Figure 3 As shown, the tension adjusting assembly 600 includes a cylinder, the cylinder is located at the land side of the trolley running drum 100, the cylinder body is connected with the cross beam of the beam 910, the second steering wheel 510 can slide along the length direction of the beam 910 relative to the beam 910, the telescopic rod of the cylinder is connected with the second steering wheel 510, the cylinder drives the second steering wheel 510 to slide along the length direction of the beam 910, thereby adjusting the tension of the second traction rope 120. Preferably, the tension adjusting assembly 600 includes two cylinders, the telescopic rods of the two cylinders are connected with the two second steering wheels 510 one by one, and the tension of the two second traction ropes 120 can be adjusted separately by the two cylinders.

[0053] The trolley traction device provided by the present application has the following advantages: the first traction rope 110 and the second traction rope 120 are output from the sea side of the trolley running drum 100 by arranging the first redirection wheel assembly 200 and the second redirection wheel assembly 300 at the sea side of the trolley running drum 100, so that the trolley running drum 100 can be arranged on the upper part of the machine room chassis, and a sunken chassis does not need to be arranged at the bottom of the machine room chassis, thereby simplifying the manufacturing difficulty of the machine room chassis; after the trolley running drum 100 is arranged on the upper part of the machine room chassis, a guardrail does not need to be arranged around the trolley running drum 100, thereby effectively improving the space utilization rate of the machine room 900, reducing the volume of the machine room 900, and reducing the production cost of the machine room 900.

[0054] As Figure 4As shown, the present invention also provides a quay crane, comprising a beam, a pitching mechanism, and the trolley traction device described in any of the above embodiments, wherein the machine room is disposed on the beam; the pitching mechanism is disposed on the upper portion of the underframe of the machine room and is located on the land side of the trolley running drum. By locating the pitching mechanism 800 on the land side of the trolley running drum 100, the quay crane can simplify the structure of the trolley traction device and facilitate the installation and removal of the trolley running drum 100.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A trolley traction device, characterized in that: include: A machine room (900), wherein the lower portion of the chassis of the machine room (900) is flat; A trolley running drum (100) is provided on the upper portion of the chassis of the machine room (900); a first traction rope (110) and a second traction rope (120) are respectively wound around the outer periphery of the trolley running drum (100) in opposite directions; a first redirecting wheel assembly (200), the first redirecting wheel assembly (200) being arranged on the sea surface of the trolley running reel (100); a second redirecting wheel assembly (300), the second redirecting wheel assembly (300) being arranged on the sea surface of the trolley running reel (100); A first steering wheel assembly (400) and a second steering wheel assembly (500), the first steering wheel assembly (400) and the second steering wheel assembly (500) are arranged at both ends of the beam (910) in a one-to-one correspondence; the first traction rope (110) is output from the sea side of the trolley running drum (100), and is connected to the sea side of the trolley (700) after passing through the first redirecting wheel assembly (200) and the first steering wheel assembly (400) in sequence; the second traction rope (120) is output from the sea side of the trolley running drum (100), and is connected to the land side of the trolley (700) after passing through the second redirecting wheel assembly (300) and the second steering wheel assembly (500) in sequence.

2. The trolley traction device according to claim 1, characterized in that: The first redirecting wheel assembly (200) comprises two first redirecting wheel groups, the two first redirecting wheel groups being arranged at intervals along the length direction of the trolley running drum (100), and the two first traction ropes (110) outputted from the trolley running drum (100) being wound around the two first redirecting wheel groups in a one-to-one correspondence.

3. The trolley traction device according to claim 2, characterized in that: The first redirecting wheel assembly comprises a first upper redirecting wheel (210) and a first lower redirecting wheel (220), wherein the first upper redirecting wheel (210) is arranged above the first lower redirecting wheel (220), and the first traction rope (110) outputted from the trolley running drum (100) passes around the first upper redirecting wheel (210) and the first lower redirecting wheel (220) in sequence.

4. The trolley traction device according to claim 3, characterized in that: The first upper redirecting wheel (210) and the first lower redirecting wheel (220) are located in the same vertical plane, and the center of the first upper redirecting wheel (210) and the center of the first lower redirecting wheel (220) are located on the same vertical straight line.

5. The trolley traction device according to claim 3, characterized in that: The second redirecting wheel assembly (300) comprises two second redirecting wheel groups, the two second redirecting wheel groups being arranged at intervals along the length direction of the trolley running drum (100), the two second traction ropes (120) output from the trolley running drum (100) being wound around the two second redirecting wheel groups in a one-to-one correspondence; the two second redirecting wheel groups are located between the two first redirecting wheel groups.

6. The trolley traction device according to any one of claims 3 to 5, characterized in that: The second redirecting wheel assembly comprises a second upper redirecting wheel (310) and a second lower redirecting wheel (320), wherein the second upper redirecting wheel (310) is arranged above the second lower redirecting wheel (320), and the second traction rope (120) outputted from the trolley running drum (100) passes around the second upper redirecting wheel (310) and the second lower redirecting wheel (320) in sequence.

7. The trolley traction device according to claim 6, characterized in that: The second upper redirecting wheel (310) and the second lower redirecting wheel (320) are located in the same vertical plane, and the center of the second upper redirecting wheel (310) and the center of the second lower redirecting wheel (320) are located on the same vertical straight line.

8. The trolley traction device according to claim 6, characterized in that: The height of the second upper redirecting wheel (310) is less than the height of the first upper redirecting wheel (210), and the height of the second lower redirecting wheel (320) is equal to the height of the first lower redirecting wheel (220).

9. The trolley traction device according to any one of claims 3 to 5, characterized in that: Also includes: A tensioning adjustment assembly (600) is connected to the first upper redirecting wheel (210) or the second steering wheel assembly (500), and the tensioning adjustment assembly (600) is used to adjust the distance between the first upper redirecting wheel (210) or the second steering wheel assembly (500) and the trolley running drum (100) to adjust the tension of the first traction rope (110) or the second traction rope (120).

10. A quay crane, characterized in that: It comprises a beam (910), a pitching mechanism (800) and a trolley traction device according to any one of claims 1 to 9, wherein the machine room (900) is arranged on the beam; the pitching mechanism (800) of the quay crane is arranged on the upper part of the chassis of the machine room (900) and is located on the land side of the trolley running drum (100).

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