Lifting system and port crane
By adopting a combined design of two lifting mechanisms and three micro-moving winch mechanisms in the port crane, the lifting system of the traditional eight-rope wrapping small vehicle model is solved, and the equipment is lightweight and energy consumption is reduced, and the equipment is improved and the equipment is stable and maintenance convenience is facilitated.
Patent Information
- Application Number
- CN202510440765.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2025-07-18
AI Technical Summary
The lifting system of the traditional eight-rope wrapping small car type has problems such as high supporting costs, large wire rope tension, large diameter of pulleys and reels, heavy equipment weight, high useless workload, and large mobile load of the whole machine, resulting in increased equipment cost and energy consumption.
The combination design of two lifting and winching mechanisms, four sets of rope mechanisms and three micro-moving winching mechanisms is adopted. The micro-moving winching mechanism realizes the translation and rotation of the spreader on the shelves, reduces the push rod device, reduces the weight of the equipment and is useless.
The compact structure reduces the weight and useless work of the equipment, reduces costs, extends the life of the wire rope, improves the stability and maintenance convenience of the equipment, and reduces the power and energy consumption of the motor.
Smart Images
Figure CN120328359A_ABST
Abstract
Description
Technical Field
[0001] This application relates to port lifting equipment, and particularly to a hoisting system and a port crane. Background Art
[0002] Currently, for automated port cranes globally, such as yard cranes (referred to as rail-mounted gantry cranes or RMGs for short), quay cranes (referred to as ship-to-shore cranes or STSs for short), etc., yard cranes can be rail-mounted cranes (referred to as rail-mounted gantry cranes or RMGs for short), rubber-tired cranes (referred to as rubber-tired gantry cranes or RTGs for short), etc. The trolley of the vast majority of automated yard cranes and some quay cranes adopts a hoisting system with a traditional eight-rope winding trolley type. The wire ropes in the winding form of this hoisting system form a stable inverted triangle structure with the load, having excellent anti-sway performance, without the need for additional auxiliary anti-sway devices. At the same time, relying on the four push rods equipped on the spreader upper frame, the translation and rotation on the horizontal plane can be realized, and the precise grasping and releasing of containers can be completed, with a very high automation operation efficiency.
[0003] With the rapid development of global automated terminals, green, low-carbon, energy-saving and high-efficiency have become the main theme of the times. Users no longer only focus on equipment prices and delivery periods, but are more concerned about issues such as terminal infrastructure investment, equipment energy consumption, operation efficiency, operation and maintenance costs, and carbon emissions in terms of sustainable development. In order to promote the lightweight of automated port cranes, it is necessary to start from the many disadvantages of traditional eight-rope winding.
[0004] However, the hoisting system with the traditional eight-rope winding trolley type (see Figure 5 shown) mainly has the following disadvantages: the cost of the hoisting system accessories is high; the wire rope tension is large, the pulley and drum diameters are large, the output torque of the drum and the reduction gearbox is high, the gear module and bearing load are large, resulting in high costs and heavy weights of accessories such as the reduction gearbox, coupling, brake, drum and drum coupling, etc., ultimately leading to a large weight of the trolley; twelve main hoisting pulleys need to be arranged on the trolley, among which four wire ropes continuously pass through two pulleys within a distance of less than three meters, and the service life of the wire ropes is relatively short; four sets of push rod devices are installed on the spreader upper frame, with a relatively large weight, and the spreader upper frame has a high amount of useless work during the hoisting operation; the overall machine has a large moving load and a high power of the trolley motor, further increasing the cost of accessories, the overall weight of the machine, and the wheel pressure of the trolley, etc. Summary of the Invention
[0005] The purpose of this application is to propose a hoisting system and a port crane, which can reduce the weight of the spreader upper frame, lower the power of the equipment and the ineffective moving load, reduce the useless work of the equipment, and reduce the cost.
[0006] In order to solve at least one of the above technical problems, the technical solution of this application is as follows:
[0007] According to a first aspect of the present application, a hoisting system is provided for lifting a spreader upper frame corresponding to a trolley in a port crane, including: two hoisting winch mechanisms arranged at both ends in the width direction of the trolley and having their axial directions consistent with the length direction of the trolley; a driving device arranged on the trolley and used to drive the two hoisting winch mechanisms to rotate; four sets of rope mechanisms, each hoisting winch mechanism corresponding to two sets of rope mechanisms respectively, each set of rope mechanisms including a first steel wire rope, a second steel wire rope, and a first pulley and a second pulley arranged on the spreader upper frame; three micro hoisting winch mechanisms arranged on the trolley, with two of them located below one end of their respective corresponding hoisting winch mechanisms and the other located between the two hoisting winch mechanisms; wherein, one end of each first steel wire rope is connected to the hoisting winch mechanism, and the other end is connected to the corresponding micro hoisting winch mechanism after passing around the corresponding first pulley. One end of the four second steel wire ropes is connected to their respective corresponding hoisting winch mechanisms, and the other end is connected to the micro hoisting winch mechanism between the two hoisting winch mechanisms after passing around the corresponding second pulley; the plane of the traveling path of each first steel wire rope after the rope exits is perpendicular to the width direction of the trolley, the plane of the traveling path of each second steel wire rope after the rope exits is perpendicular to the length direction of the trolley, the winding directions of the two first steel wire ropes connected to each hoisting winch mechanism on the corresponding micro hoisting winch mechanism are the same, the two second steel wire ropes connected to each hoisting winch mechanism are respectively connected to both ends of the corresponding micro hoisting winch mechanism, and the winding directions of the two second steel wire ropes at the same end on the micro hoisting winch mechanism are the same.
[0008] In a possible implementation of the above first aspect, the driving device includes: a first driving member located between the two hoisting winch mechanisms and having driving shafts respectively arranged at both ends thereof, the axial directions of the two driving shafts being consistent with the width direction of the trolley; two speed reducers, the input ends of which are connected to the driving shafts in one-to-one correspondence, and the output shafts of which are connected to one end of their respective corresponding hoisting winch mechanisms.
[0009] In a possible implementation of the above first aspect, the hoisting winch mechanism includes: a first drum, one end of which is provided with a first coupling for connecting to the output shaft of the speed reducer; a support seat arranged on the trolley and located at the other end of the first drum, the support seat being rotatably connected to the first drum.
[0010] In a possible implementation of the above first aspect, the first drum is provided with a rope pressing assembly that cooperates with the two sets of rope mechanisms corresponding to it respectively.
[0011] In a possible implementation of the above first aspect, the input end of the speed reducer is connected to its corresponding driving shaft through a second coupling.
[0012] In a possible implementation of the above first aspect, the driving device further includes: a braking mechanism arranged on the trolley and located between the speed reducer and the first driving member, for braking the first driving member.
[0013] In a possible implementation of the above first aspect, a steering pulley is provided at one end of each hoisting winch mechanism away from its corresponding micro winch mechanism. One of the two first steel wires connected to the hoisting winch mechanism sequentially bypasses its corresponding first pulley and the steering pulley and then is connected to the corresponding micro winch mechanism, and the other bypasses its corresponding first pulley and then is connected to the corresponding micro winch mechanism.
[0014] In a possible implementation of the above first aspect, the axial direction of each first pulley is consistent with the width direction of the trolley, and the axial direction of each second pulley is consistent with the length direction of the trolley.
[0015] In a possible implementation of the above first aspect, the two first pulleys corresponding to each hoisting winch mechanism are arranged on a pulley frame, and the pulley frame is arranged on the upper frame of the spreader.
[0016] In a possible implementation of the above first aspect, the micro winch mechanism includes: a second drum; and a second driving member arranged on the trolley and having an output end connected to one end of the second drum to drive the second drum to rotate.
[0017] In a possible implementation of the above first aspect, the axial directions of the steering pulley and the second drum are both consistent with the axial direction of the first pulley, and the steering pulley and its corresponding second drum are at the same height.
[0018] According to the second aspect of the present application, a port crane is provided, including the hoisting system of the above first aspect.
[0019] The above technical solutions of the present application have at least one of the following beneficial effects:
[0020] According to the hoisting system of the present application, three micro winch mechanisms are arranged on the trolley. Two of the three micro winch mechanisms correspond to the two hoisting winch mechanisms one by one and are respectively located below one end of their corresponding hoisting winch mechanisms, and the other micro winch mechanism is located between the two hoisting winch mechanisms. Each hoisting winch mechanism corresponds to two sets of rope assemblies. The two micro winch mechanisms below the two hoisting winch mechanisms can realize the translation and rotation of the upper frame of the spreader along the length direction of the trolley. The micro winch mechanism between the two hoisting winch mechanisms can realize the translation of the upper frame of the spreader along the width direction of the trolley, etc. Thus, the structure is simple, compact, occupies a small space, does not require a push rod device to be arranged on the upper frame of the spreader, and realizes the translation and rotation of the upper frame of the spreader through the three micro winch mechanisms arranged on the trolley, increasing the translation distance and rotation angle of the upper frame of the spreader, being able to cope with the complex working conditions of the offset and skew of the container truck during parking and the height difference before and after the container truck, having high stability and reliability, reducing the weight of the upper frame of the spreader, reducing the power of the equipment and the ineffective moving load, reducing the useless work of the equipment, reducing the cost, facilitating the equalization of the wheel pressure of the trolley while releasing a large amount of maintenance space, and improving the convenience and safety of equipment maintenance.
[0021] In addition, in the technical solution of the present application, unless otherwise specifically stated, the present technical solution can be realized by adopting conventional means in the art. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0023] Figure 1 Side view of the hoisting system according to an embodiment of the present application;
[0024] Figure 2 Front view of the hoisting system according to an embodiment of the present application;
[0025] Figure 3 Top view of the hoisting system according to an embodiment of the present application;
[0026] Figure 4 Winding schematic diagram of the hoisting system according to an embodiment of the present application;
[0027] Figure 5 Winding schematic diagram of the hoisting system of the traditional eight-rope trolley type.
[0028] Explanation of the reference numerals in the drawings:
[0029] Lifting and hoisting mechanism 100; first drum 101; first coupling 102; support seat 103; support shaft 104; rope pressing assembly 105;
[0030] Driving device 200; first driving member 201; speed reducer 202; braking mechanism 203; second coupling 204;
[0031] Rope mechanism 300; first steel wire rope 301; second steel wire rope 302; first pulley 303; second pulley 304; steering pulley 305; pulley bracket 306;
[0032] Micro-movement hoisting mechanism 400; second drum 401; second driving member 402;
[0033] Trolley 500;
[0034] Upper frame of the lifting appliance 600;
[0035] Girder 700. Specific embodiments
[0036] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are some but not all of the embodiments of the present application, and are only used to explain the present application, rather than to limit the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.
[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "both ends", "both sides", "bottom", "top", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first", "second", "superior", "inferior", "main", "secondary", etc. are only used for descriptive purposes and can be simply used to more clearly distinguish different components, rather than indicating or implying relative importance.
[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0039] See Figures 1 - 4 As shown, schematically shown is a hoisting system provided according to an embodiment of the present application, which is mainly used for the lifting of the spreader upper frame 600 corresponding to the trolley 500 in a port crane. The port crane can be a yard crane, a quay crane, etc., and the yard crane can be a rail-mounted crane, a rubber-tired crane, etc. The hoisting system of the present application can include: two hoisting winch mechanisms 100, a driving device 200, four sets of rope mechanisms 300, and three micro winch mechanisms 400.
[0040] Among them, the two hoisting winch mechanisms 100 are arranged at both ends in the width direction of the trolley 500, and the axes of the two hoisting winch mechanisms 100 are both consistent with the length direction of the trolley 500. The driving device 200 is arranged on the trolley 500. The two hoisting winch mechanisms 100 are used to drive the two hoisting winch mechanisms 100 to rotate. Each hoisting winch mechanism 100 corresponds to two sets of rope mechanisms 300 respectively. The three micro winch mechanisms 400 are arranged on the trolley 500, and the three micro winch mechanisms 400 are also located above the spreader upper frame 600. Two of the three micro winch mechanisms 400 are located below one end of their respective corresponding hoisting winch mechanisms 100, and the other is located between the two hoisting winch mechanisms 100.
[0041] Each set of rope mechanisms 300 includes a first steel wire rope 301, a second steel wire rope 302, a first pulley 303 and a second pulley 304 provided on the upper frame 600 of the spreader. The three micro hoisting mechanisms 400 are also located above the first pulley 303 and the second pulley 304. One end of each first steel wire rope 301 is connected to the hoisting winch mechanism 100, and the other end of each first steel wire rope 301 bypasses the corresponding first pulley 303 and is connected to the corresponding micro hoisting mechanism 400. One end of the four second steel wire ropes 302 is connected to their respective corresponding hoisting winch mechanisms 100, and the other end of the four second steel wire ropes 302 bypasses the corresponding second pulley 304 and is connected to the micro hoisting mechanism 400 between the two hoisting winch mechanisms 100. The plane of the walking path of each first steel wire rope 301 after the rope exits is perpendicular to the width direction of the trolley 500, and the plane of the walking path of each second steel wire rope 302 after the rope exits is perpendicular to the length direction of the trolley 500. The winding directions of the two first steel wire ropes 301 connected to each hoisting winch mechanism 100 on the corresponding micro hoisting mechanism 400 are the same. The two second steel wire ropes 302 connected to each hoisting winch mechanism 100 are respectively connected to both ends of the corresponding micro hoisting mechanism 400, and the winding directions of the two second steel wire ropes 302 at the same end on the micro hoisting mechanism 400 are the same.
[0042] It should be noted that the winding directions of the two first steel wires 301 connected to each hoisting winch mechanism 100 on the corresponding micro winch mechanism 400 are the same, which means that when the micro winch mechanism 400 rotates, one of the first steel wires 301 is taken in and the other first steel wire 301 is let out; the two second steel wires 302 connected to each hoisting winch mechanism 100 are respectively connected to both ends of the corresponding micro winch mechanism 400, and the winding directions of the two second steel wires 302 at the same end on the micro winch mechanism 400 are the same, which means that when the micro winch mechanism 400 rotates, the two second steel wires 302 corresponding to one of the hoisting winch mechanisms 100 are taken in and the two second steel wires 302 corresponding to the other hoisting winch mechanism 100 are let out. The trolley 500 is arranged on the girder 700 of the port crane. The girder 700 (which can be a single box girder structure or a double box girder structure) is arranged horizontally. The trolley 500 can move along the length direction of the girder 700. The length direction of the trolley 500 is consistent with the length direction of the girder 700 and the movement direction of the trolley 500. The movement direction of the trolley of the port crane is usually perpendicular to the length direction of the girder 700 and consistent with the width direction of the trolley 500. The plane of the walking path of each first steel wire 301 after the wire exits is perpendicular to the width direction of the trolley 500, and the plane of the walking path of each second steel wire 302 after the wire exits is perpendicular to the length direction of the trolley 500. Here, perpendicular means approximately perpendicular, and there can be a certain included angle (such as 0-10° etc.), which can meet the requirements of the translation and rotation of the spreader upper frame 600. The X direction and the Y direction are given in the drawings. The X direction is the width direction of the trolley 500 and the movement direction of the trolley, and the Y direction is the length direction of the trolley 500 and the movement direction of the trolley 500.
[0043] Exemplarily, Figure 4For reference, a, b, e, and f are four first steel wire ropes 301, and c, d, g, and h are four second steel wire ropes 302. One ends of a, b, c, and d are connected to their corresponding hoisting winch mechanisms 100, and one ends of e, f, g, and h are connected to their corresponding hoisting winch mechanisms 100. The other ends of a and b are connected to their corresponding micro winch mechanisms 400, and the other ends of e and f are connected to their corresponding micro winch mechanisms 400. The other ends of c, d, g, and h are connected to the micro winch mechanism 400 located between the two hoisting winch mechanisms 100. One end of the micro winch mechanism 400 to which c and g are connected, and the other end of the micro winch mechanism 400 to which d and h are connected. When it is necessary to adjust the position of the spreader upper frame 600 according to specific situations, the micro winch mechanism 400 between the two hoisting winch mechanisms 100 rotates clockwise, c and d are unwound and g and h are wound, realizing the left translation of the spreader upper frame 600. Similarly, the right translation of the spreader upper frame 600 can also be realized; the two micro winch mechanisms 400 corresponding to the lower part of the two hoisting winch mechanisms 100 rotate clockwise, a and e are wound and b and f are unwound, realizing the backward translation of the spreader upper frame 600. Similarly, the forward translation of the spreader upper frame 600 can also be realized; the micro winch mechanism 400 to which a and b are connected rotates clockwise and the micro winch mechanism 400 to which e and f are connected rotates counterclockwise, a and f are wound and b and e are unwound, realizing the counterclockwise rotation of the spreader upper frame 600. Similarly, the clockwise rotation of the spreader upper frame 600 can also be realized.
[0044] Thus, the structure is simple, compact, occupies a small space, does not require a push rod device to be arranged on the spreader upper frame 600, realizes the translation and rotation of the spreader upper frame 600 through the three micro winch mechanisms 400 arranged on the trolley 500, increases the translation distance and rotation angle of the spreader upper frame 600, can cope with the complex working conditions such as offset and skew when the container truck stops and the height difference before and after the container truck, has high stability and reliability, reduces the weight of the spreader upper frame 600, reduces the power of the equipment and the ineffective moving load, reduces the useless work of the equipment, reduces the cost, and is also convenient for equalizing the wheel pressure of the trolley 500 while releasing a large amount of maintenance space, improves the convenience and safety of equipment maintenance, is convenient for realizing the lightweight of the equipment, and is better used for port cranes, such as rail-mounted cranes, rubber-tyred gantry cranes, quay cranes, etc. In addition, the steel wire ropes of the hoisting system of the present application also do not have the situation of continuous winding around the pulley within three meters, which can effectively inhibit problems such as premature wear and broken wires of the steel wire ropes caused by continuous bending fatigue in different directions, prolongs the service life of the steel wire ropes, saves the cost of frequently replacing the steel wire ropes, reduces the shutdown maintenance time, and improves the equipment utilization rate, etc.
[0045] In some embodiments, referring to Figures 2 - 3As shown, the driving device 200 may include: a first driving member 201 and two speed reducers 202. The first driving member 201 is located between the two hoisting winch mechanisms 100, and driving shafts (not shown in the figure) are respectively provided at both ends thereof. The axial directions of the two driving shafts are consistent with the width direction of the trolley 500. The input ends of the speed reducers 202 are respectively connected to the driving shafts in one-to-one correspondence, and the output shafts thereof are connected to one ends of the respective corresponding hoisting winch mechanisms 100. The input end of the speed reducer 202 and its corresponding driving shaft are connected by a second coupling 204. The driving device 200 further includes a braking mechanism 203. The braking mechanism 203 is provided on the trolley 500 and is located between the speed reducer 202 and the first driving member 201. The braking mechanism 203 is used to brake the first driving member 201. The first driving member 201 may adopt a high-speed motor, the speed reducer 202 may adopt a high speed ratio, the second coupling 204 may adopt a high-speed coupling, and the braking mechanism 203 may adopt a high-speed brake.
[0046] That is to say, the first driving member 201 may adopt a motor with double driving shafts, and two hoisting winch mechanisms 100 are simultaneously driven by one motor to rotate synchronously, which is beneficial to ensuring the synchronism of the two hoisting winch mechanisms 100, effectively controlling the attitude of the upper frame 600 of the spreader, reducing the difficulty of electrical synchronous control of the two independent hoisting winch mechanisms 100, reducing the electrical cost, and having a simpler structure and also reducing the weight of the equipment, etc. The first driving member 201 adopts a high-speed motor, and the speed reducer 202 adopts a high speed ratio, effectively reducing the torque at the high-speed end, reducing the selection of the high-speed coupling, and reducing the load at the high-speed end of the speed reducer 202.
[0047] In some embodiments, referring to Figure 1 , 3 As shown, the hoisting winch mechanism 100 may include: a first drum 101 and a support seat 103. A first coupling 102 for connecting to the output shaft of the speed reducer 202 is provided at one end of the first drum 101. The support seat 103 is provided on the trolley 500 and is located at the other end of the first drum 101. The support seat 103 is rotatably connected to the first drum 101. Exemplarily, a support shaft 104 may be provided on the support seat 103, and a bearing (not shown in the figure) cooperating with the support shaft 104 is provided on the first drum 101; alternatively, a support shaft 104 may be provided at the end of the first drum 101 away from the speed reducer 202, and a bearing cooperating with the support shaft 104 is provided on the support seat 103. The first coupling 102 may adopt a low-speed coupling. Thus, the operation is convenient and the stable rotation of the first drum 101 is ensured.
[0048] Furthermore, referring to Figures 1 - 2As shown, the height difference between the first reel 101 and the upper frame 600 of the spreader needs to be sufficient so that the rope capacity of the first reel 101 can avoid being restricted by the rope exit angle of the wire rope, thereby further reducing the diameter of the first reel 101. Under the same load conditions, the torque acting on the first reel 101 and the speed reducer 202 is smaller, reducing the selection of the speed reducer 202, the coupling and the wire rope, and reducing the weight of the equipment and the cost of the accessories. For example, if the diameter of the wire rope is reduced from 28 mm to 20 mm, the outer diameter of the first reel 101 can be reduced from 550 mm to 500 mm, thereby reducing the length of the wire rope. At the same time, a low-profile design with a reduced center height of the reel is adopted, effectively suppressing the motor vibration and reducing the weight of the hoisting system.
[0049] In some embodiments, referring to Figure 1 、 3 As shown, a rope pressing assembly 105 is provided on the first reel 101 and is matched with two sets of rope mechanisms 300 corresponding thereto. For example, the rope pressing assembly 105 may include a rope pressing plate, and the rope pressing plate can be fixed on the first reel 101 through fasteners such as screws, so that the rope end of the wire rope is fixed on the first reel 101. A rope groove, a baffle, etc. that cooperate with the wire rope may also be provided on the first reel 101. Thereby, the operation is more convenient and fast, and the safety and reliability are higher.
[0050] In some embodiments, referring to Figure 1 、 3 and Fig. 4, a steering pulley 305 is provided at one end of each hoisting winch mechanism 100 away from its corresponding micro winch mechanism 400. One of the two first wire ropes 301 connected to the hoisting winch mechanism 100 sequentially bypasses its corresponding first pulley 303 and the steering pulley 305 and then is connected to the corresponding micro winch mechanism 400, and the other bypasses its corresponding first pulley 303 and then is connected to the corresponding micro winch mechanism 400. The steering pulley 305 is also located above the upper frame 600 of the spreader and the first pulley 303. That is to say, the first wire rope 301 sequentially bypasses its corresponding first pulley 303 and the steering pulley 305, so that the first wire rope 301 can open a certain included angle after bypassing the first pulley 303. Thereby, the structure is more stable, the operation is more convenient, and the safety and reliability are higher.
[0051] Furthermore, referring to Figures 1 - 4As shown, the planes of the running paths of the four first steel wires 301 after the wires exit are staggered in sequence along the width direction of the trolley 500, the planes of the running paths of the four second steel wires 302 after the wires exit are staggered in sequence along the length direction of the trolley 500, and the four first steel wires 301 and the four second steel wires 302 are also staggered from each other. The first steel wire 301 that bypasses the first pulley 303 and is directly connected to the micro hoisting mechanism 400 can form an inverted triangle, the second steel wire 302 that bypasses the second pulley 304 and is directly connected to the micro hoisting mechanism 400 can also form an inverted triangle, and the first steel wire 301 that bypasses the first pulley 303 and then bypasses the steering pulley 305 can also form an inverted triangle. Thus, it is ensured that a certain opening angle can be formed after each steel wire bypasses the corresponding pulley, making it more stable and reliable.
[0052] In some embodiments, referring to Figures 1 - 3 As shown, the axis of each first pulley 303 is consistent with the width direction of the trolley 500, and the axis of each second pulley 304 is consistent with the length direction of the trolley 500. Thus, it is ensured that each wire can bypass the corresponding pulley more stably.
[0053] In some embodiments, since the steel wire forms a connection that cannot be physically fixed with the pulley after bypassing and turning back around the pulley on the spreader upper frame 600, during the acceleration and deceleration of the trolley 500, the pulley will rotate freely, causing the steel wire and the suspended load to swing together, seriously affecting the operation efficiency. Therefore, referring to Figure 1 As shown, the two first pulleys 303 corresponding to each hoisting mechanism 100 are arranged on the pulley frame 306, and the pulley frame 306 is arranged on the spreader upper frame 600. The two first pulleys 303 on the pulley frame 306 are arranged at intervals along the length direction of the trolley 500. The micro hoisting mechanism 400 is located above a position close to one of the first pulleys 303, the steering pulley 305 is located above a position close to the other first pulley 303. After the corresponding first steel wire 301 bypasses the first pulley 303 far from the micro hoisting mechanism 400, it is directly connected to the micro hoisting mechanism 400. After the corresponding other first steel wire 301 bypasses the first pulley 303 close to the micro hoisting mechanism 400, it first passes through the steering pulley 305 and then is connected to the micro hoisting mechanism 400, so that the two first steel wires 301 form two inverted triangles with opposite directions, thereby being able to restrain the steel wire and the suspended load from swinging together, being safer and more reliable.
[0054] In some embodiments, referring to Figure 3As shown, the fine winch mechanism 400 may include: a second drum 401 and a second driving member 402. The second driving member 402 is disposed on the trolley 500 and its output end is connected to one end of the second drum 401. The second driving member 402 is used to drive the second drum 401 to rotate. The second driving member 402 may adopt a structure of a motor and a reducer or a hydraulic motor to drive the second drum 401 to rotate. The second drum 401 may be directly mounted on the output shaft of the reducer or the hydraulic motor. The structure of the connection between the wire rope and the second drum 401 may refer to the above-mentioned first drum 101. For example, two first wire ropes 301 may be fixedly connected to the second drum 401 by using a rope pressing plate structure, and the two first wire ropes 301 on the second drum 401 may also be connected to form one wire rope. Thus, the structure is simple, the operation is convenient, and the weight of the equipment is reduced.
[0055] In some embodiments, with reference to Figure 3 As shown, the fine winch mechanism 400 connected by four second wire ropes 302 may include two second drums 401. The two second drums 401 are disposed at both ends in the length direction of the rotating shaft. The length direction of the rotating shaft is consistent with the Y direction. The second driving member 402 is connected to the rotating shaft. The two second wire ropes 302 connected to each hoisting winch mechanism 100 are respectively connected to the two second drums 401 of the fine winch mechanism 400. The winding directions of the two second wire ropes 302 on each second drum 401 of the fine winch mechanism 400 are the same, and the winding directions of the second wire ropes 302 on the two second drums 401 are opposite (i.e., the rotation directions of the two second drums 401 are opposite). The two second wire ropes 302 on each second drum 401 may be fixed by using a rope pressing plate structure, and the two second wire ropes 302 on each second drum 401 may also be connected to form one wire rope. Thus, the structure is simpler, the symmetry of the four second wire ropes 302 is ensured, and it is more stable and reliable. In addition, the second driving member 402 may also adopt a structure with a double output shaft and be respectively connected to the two second drums 401.
[0056] In some embodiments, with reference to Figure 1 As shown, the axial direction of the steering pulley 305 and the axial direction of the second drum 401 are both consistent with the axial direction of the first pulley 303, and the steering pulley 305 and its corresponding second drum 401 are at the same height. Thus, a stable symmetric winding structure can be formed.
[0057] According to an embodiment of the present application, a port crane is further provided, including the above-mentioned hoisting system. Among them, the port crane may be a gantry crane, a rubber tyred gantry crane, a quay crane, etc. The other mechanisms of the port crane may adopt the corresponding mechanisms in the prior art, which will not be elaborated here.
[0058] Based on the above embodiments of the present application, without explicit negation or conflict, the technical features of one embodiment can be beneficially combined with one or more other embodiments.
[0059] The above are only some embodiments of the present application, which are only used to illustrate the technical solutions of the present application and are not intended to limit it. It should be understood that for those of ordinary skill in the art, without departing from the inventive concept of the present application, improvements or replacements can be made according to the above description, and all such improvements and replacements should fall within the protection scope of the present application. In this case, all details can be replaced with equivalent elements, and the materials, shapes, and dimensions can also be arbitrary.
Claims
1. A lifting system for lifting the spreader upper frame corresponding to the trolley of a port crane, characterized in that Comprising: Two hoisting winch mechanisms, arranged at both ends in the width direction of the trolley and with their axial directions all consistent with the length direction of the trolley; A driving device, arranged on the trolley and used to drive the two hoisting winch mechanisms to rotate; Four groups of rope mechanisms, each hoisting winch mechanism corresponding to two groups of the rope mechanisms respectively, and each group of the rope mechanisms includes a first steel wire rope, a second steel wire rope, and a first pulley and a second pulley arranged on the upper frame of the spreader; Three micro-movement winch mechanisms, arranged on the trolley, with two of them located below one end of their respective corresponding hoisting winch mechanisms, and the other one located between the two hoisting winch mechanisms; Wherein, one end of each first steel wire rope is connected to the hoisting winch mechanism, and the other end is wound around the corresponding first pulley and then connected to the corresponding micro-movement winch mechanism. One end of the four second steel wire ropes is connected to their respective corresponding hoisting winch mechanisms, and the other end is wound around the corresponding second pulley and then connected to the micro-movement winch mechanism between the two hoisting winch mechanisms; The plane of the traveling path of each first steel wire rope after the rope exits is perpendicular to the width direction of the trolley, the plane of the traveling path of each second steel wire rope after the rope exits is perpendicular to the length direction of the trolley. The winding directions of the two first steel wire ropes connected to each hoisting winch mechanism on the corresponding micro-movement winch mechanism are the same. The two second steel wire ropes connected to each hoisting winch mechanism are respectively connected to both ends of the corresponding micro-movement winch mechanism, and the winding directions of the two second steel wire ropes at the same end on the micro-movement winch mechanism are the same.
2. The hoisting system according to claim 1, wherein The driving device includes: A first driving member, located between the two hoisting winch mechanisms and having driving shafts respectively arranged at both ends thereof, and the axial directions of the two driving shafts are consistent with the width direction of the trolley; Two speed reducers, with their input ends connected to the driving shafts in a one-to-one correspondence, and their output ends connected to one end of their respective corresponding hoisting winch mechanisms.
3. The hoisting system according to claim 2, characterized in that, The hoisting winch mechanism includes: A first drum, with a first coupling arranged at one end thereof for connecting to the output shaft of the speed reducer; A support seat, arranged on the trolley and located at the other end of the first drum, and the support seat is rotationally connected to the first drum.
4. The hoisting system according to claim 3, characterized in that, The first drum is provided with a rope pressing assembly that cooperates with the two groups of the corresponding rope mechanisms respectively.
5. The hoisting system according to claim 2, characterized in that The input end of the speed reducer and its corresponding driving shaft are connected through a second coupling.
6. The hoisting system according to claim 2, characterized in that, The driving device further includes: A braking mechanism, arranged on the trolley and located between the speed reducer and the first driving member, for braking the first driving member.
7. The hoisting system according to claim 1, characterized in that, A steering pulley is arranged at one end of each hoisting winch mechanism away from its corresponding micro-movement winch mechanism. One of the two first steel wire ropes connected to the hoisting winch mechanism is wound around the corresponding first pulley and the steering pulley in sequence and then connected to the corresponding micro-movement winch mechanism, and the other one is wound around the corresponding first pulley and then connected to the corresponding micro-movement winch mechanism.
8. The hoisting system according to claim 7, characterized in that, The axial direction of each of the first pulleys is consistent with the width direction of the trolley, and the axial direction of each of the second pulleys is consistent with the length direction of the trolley; The two first pulleys corresponding to each of the hoisting winch mechanisms are arranged on a pulley frame, and the pulley frame is arranged on the upper frame of the spreader.
9. The hoisting system according to claim 8, characterized in that, The fine motion winch mechanism includes: A second drum; A second driving member, arranged on the trolley and having an output end connected to one end of the second drum to drive the second drum to rotate; Wherein, the axial direction of the steering pulley and the axial direction of the second drum are both consistent with the axial direction of the first pulley, and the steering pulley and its corresponding second drum are located at the same height.
10. A port crane, characterized in that, Comprising the hoisting system according to any one of claims 1 to 9.