Leveling a lifting mechanism of a container spreader

Abstract

The utility model discloses a kind of lifting mechanisms of leveling container spreader, including eight single sets of driving devices and trolley frame, eight single sets of driving devices are distributed and set on trolley frame, four single sets of driving devices are distributed in the four corners of "hui" character type inner ring in rectangle, and the other four single sets of driving devices are distributed in the four corners of "hui" character type outer ring in rectangle, four single sets of driving devices of corresponding inner ring are respectively provided with mounting hole on trolley frame, single set driving device includes driving device, reel assembly and movable pulley system, reel assembly is respectively installed on trolley frame, driving device is used to drive reel assembly to retract and release steel wire rope, movable pulley system of inner ring is installed at mounting hole, movable pulley system of outer ring is installed in trolley frame side, and movable pulley system is used to pull steel wire rope.The utility model is set through eight single sets of driving devices and trolley frame, can utilize the single set driving device of "hui" character type distribution to stably connect eight rigging screw clamps and carry out independent leveling control.

Description

Technical Field

[0001] This utility model relates to the field of lifting mechanism technology, specifically to a lifting mechanism for a leveling container spreader. Background Technology

[0002] Currently, the most commonly used container spreader is the eight-rope lifting mechanism. The common eight-rope lifting mechanism adopts a single drum and single drive mechanism, that is, a single drive mechanism drives a single drum to achieve the simultaneous winding or unwinding of eight wire ropes.

[0003] However, the existing single-drum, single-drive eight-rope lifting mechanism technology has high requirements for the positioning accuracy of horizontal and vertical pulleys. If the cumulative error is large, it will cause different changes in the amount of steel wire rope in each group. This will cause the lifting device to twist as the lifting height increases, resulting in inaccurate positioning of the lifting device. This makes it difficult to place and lower the box. Furthermore, the single-drum, single-drive eight-rope lifting mechanism technology is not convenient for adjusting individual steel wire ropes, which increases the inconvenience of leveling the lifting device.

[0004] Therefore, there is an urgent need for a lifting mechanism for leveling container spreaders to solve the problem of inconvenient leveling of common eight-rope lifting mechanisms. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a lifting mechanism for a leveling container spreader, thus solving the problem of inconvenient leveling in common eight-rope lifting mechanisms.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A lifting mechanism for a leveling container spreader includes eight single-drive units and a trolley frame. The eight single-drive units are arranged in a U-shape on the trolley frame. Four single-drive units are symmetrically distributed in a rectangle at the four corners of the inner circle of the U-shape, and another four single-drive units are symmetrically distributed in a rectangle at the four corners of the outer circle of the U-shape. The trolley frame has vertically penetrating mounting holes corresponding to the four single-drive units in the inner circle of the U-shape. Each single-drive unit includes a drive unit, a drum assembly, and a movable pulley system. The drum assemblies are mounted on the trolley frame. The drive unit is used to drive the drum assembly to wind up and unwind the wire rope. The movable pulley system in the inner circle of the U-shape is installed at the mounting holes, through which the wire rope can pass. The movable pulley system in the outer circle of the U-shape is installed on the side of the trolley frame and is used to pull the wire rope.

[0007] To optimize the above technical solution, the specific measures also include: Furthermore, the movable pulley system includes an adjustment mechanism and a pulley, wherein the adjustment mechanism is used to adjust the operating angle of the pulley.

[0008] Furthermore, the adjustment mechanism includes a first electric push rod, a second electric push rod, a first connecting rod, a second connecting rod, and a pin. The lower ends of the first and second connecting rods of the adjustment mechanism located in the inner ring of the "U" shape are symmetrically hinged to the inner walls of corresponding mounting holes, and their upper ends extend out of the mounting holes and are connected to a pin. A pulley is rotatably mounted on the pin. One end of the first and second electric push rods of the adjustment mechanism located in the inner ring of the "U" shape is symmetrically hinged to the trolley frame, and the other end is respectively hinged to the upper ends of the first and second connecting rods. The lower ends of the first and second connecting rods of the adjustment mechanism located in the outer ring of the "U" shape are symmetrically hinged to the side walls of the trolley frame, and their upper ends extend above the trolley frame and are connected to a pin. A pulley is rotatably mounted on the pin. One end of the first and second electric push rods of the adjustment mechanism located in the outer ring of the "U" shape is symmetrically hinged to the trolley frame, and the other end is respectively hinged to the upper ends of the first and second connecting rods.

[0009] Furthermore, the adjustment mechanism also includes a first hinge base and a second hinge base. The first connecting rod and the second connecting rod located in the inner ring of the "U" shape are respectively hinged to the inner wall of the mounting hole through the first hinge base and the second hinge base; the first connecting rod and the second connecting rod located in the outer ring of the "U" shape are respectively hinged to the side wall of the trolley frame through the first hinge base and the second hinge base.

[0010] Furthermore, a pin sensor is also provided on the pin.

[0011] Furthermore, it also includes a control unit, which is electrically connected to each pin sensor, the first electric push rod, and the second electric push rod. The control unit is used to control the first electric push rod and the second electric push rod to extend and retract synchronously according to the information of the pin sensors on different adjustment mechanisms.

[0012] Furthermore, the control unit is electrically connected to the drive unit of each individual drive unit to control the start and stop of the drum assembly.

[0013] Furthermore, the drive device employs a three-in-one reducer, which is used to connect to and drive the drum assembly to wind up and unwind the wire rope.

[0014] The beneficial effects of this utility model are: This invention, through the arrangement of eight single-unit drive devices and a trolley frame, utilizes eight single-unit drive devices arranged in a "U" shape to connect to eight rigging screws below the trolley frame. Each of the eight rigging screws can be independently controlled, facilitating the leveling operation of the eight-rope lifting mechanism. The "U"-shaped arrangement of the eight single-unit drive devices increases structural stability and enhances the stability of the lifting and lowering process. This invention does not require high positioning accuracy for the vertical pulleys; if accumulated errors become significant, the speed of the corresponding drum assembly can be adjusted via the drive devices to compensate for changes in the wire rope, thereby enabling precise placement and lowering of the lifting container. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the use of the lifting mechanism of a leveling container spreader proposed in this utility model; Figure 2 This is a schematic diagram showing the distribution of a single drive unit of the lifting mechanism of a leveling container spreader proposed in this utility model; Figure 3 This is a schematic diagram of the installation of a single drive unit for the lifting mechanism of a leveling container spreader proposed in this utility model; Figure 4 This is a schematic diagram of the installation of the movable pulley system of the lifting mechanism of a leveling container spreader proposed in this utility model; Figure 5 This is a top view of the structure of a single-unit drive device for the lifting mechanism of a leveling container spreader proposed in this utility model; Figure 6 This is a front view of a single-unit drive device for the lifting mechanism of a leveling container spreader proposed in this utility model; Figure 7 This is a schematic diagram of the adjustment of the movable pulley system of the lifting mechanism of a leveling container spreader proposed in this utility model.

[0016] Reference numerals in the attached drawings: 1. First electric push rod, 2. Second electric push rod, 3. Pulley, 4. Pin sensor, 5. First connecting rod, 6. First hinge base, 7. Second connecting rod, 8. Second hinge base, 9. Three-in-one reducer. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings.

[0018] As attached Figure 1 and attached Figure 2As shown, a hoisting mechanism for a leveling container spreader according to an embodiment of the present utility model includes eight single-group driving devices and a trolley frame. The eight single-group driving devices are arranged on the trolley frame in a "loop" shape distribution, four single-group driving devices are symmetrically distributed at the four corners of the inner ring of the "loop" shape in a rectangular manner, and the other four single-group driving devices are symmetrically distributed at the four corners of the outer ring of the "loop" shape in a rectangular manner. The trolley frame is respectively provided with vertically through mounting holes corresponding to the four single-group driving devices at the inner ring of the "loop" shape. Each single-group driving device includes a driving unit, a drum assembly and a movable pulley system. The drum assemblies are respectively mounted on the trolley frame, the driving unit is configured to drive the drum assembly to wind and unwind the steel wire rope. The movable pulley systems at the inner ring of the "loop" shape are installed at the mounting holes, and the mounting holes allow the steel wire rope to pass through. The movable pulley systems at the outer ring of the "loop" shape are installed on the side of the trolley frame, and the movable pulley systems are configured to draw the steel wire rope.

[0019] According to the arrangement of the eight single-group driving devices and the trolley frame, the present utility model can utilize the eight single-group driving devices distributed in the "loop" shape to respectively connect the eight rigging turnbuckles below the trolley frame, and can independently control the eight rigging turnbuckles of the spreader respectively, so as to conveniently perform the leveling operation of the eight-rope hoisting mechanism. The eight single-group driving devices distributed in the "loop" shape can improve the structural stability and enhance the stability of the spreader during the lifting and moving process. The device of the present utility model does not require high positioning accuracy for the vertical pulleys. Once the accumulated error is large, the corresponding drum assembly can be driven by the driving unit to adjust the speed to compensate for the variation of the steel wire rope, so that the spreader can land on the container and place the container accurately.

[0020] As shown in the accompanying Figure 3 , the accompanying Figure 4 and the accompanying Figure 5 , in a specific embodiment based on the above, the movable pulley system includes an adjusting mechanism and a pulley 3, and the adjusting mechanism is configured to adjust the operating angle of the pulley 3. Thereby, the adjustability of the device is improved.

[0021] Wherein, the above-mentioned adjustment mechanism includes a first electric push rod 1, a second electric push rod 2, a first link 5, a second link 7 and a pin shaft; the lower ends of the first link 5 and the second link 7 of the adjustment mechanism located at the inner ring of the "loop" shape are respectively symmetrically hinged on the inner wall of the corresponding mounting hole, the upper ends extend out of the mounting hole and are jointly connected with a pin shaft, and a pulley 3 is rotatably mounted on the pin shaft; one ends of the first electric push rod 1 and the second electric push rod 2 of the adjustment mechanism located at the inner ring of the "loop" shape are respectively symmetrically hinged on the trolley frame, and the other ends are respectively correspondingly hinged to the upper end of the first link 5 and the upper end of the second link 7; the lower ends of the first link 5 and the second link 7 of the adjustment mechanism located at the outer ring of the "loop" shape are respectively symmetrically hinged on the side wall of the trolley frame, the upper ends extend above the trolley frame and are jointly connected with a pin shaft, a pulley 3 is rotatably mounted on the pin shaft, one ends of the first electric push rod 1 and the second electric push rod 2 of the adjustment mechanism located at the outer ring of the "loop" shape are respectively symmetrically hinged on the trolley frame, and the other ends are respectively correspondingly hinged to the upper end of the first link 5 and the upper end of the second link 7.

[0022] Wherein, the above-mentioned adjustment mechanism further includes a first hinge base 6 and a second hinge base 8; the first link 5 and the second link 7 located at the inner ring of the "loop" shape are respectively hinged on the inner wall of the mounting hole via the first hinge base 6 and the second hinge base 8; the first link 5 and the second link 7 located at the outer ring of the "loop" shape are respectively hinged on the side wall of the trolley frame via the first hinge base 6 and the second hinge base 8.

[0023] Wherein, a pin shaft sensor 4 is further disposed on the above-mentioned pin shaft.

[0024] In another specific embodiment based on the above, a control unit is further included, the control unit is electrically connected to each pin shaft sensor 4, the first electric push rod 1 and the second electric push rod 2 respectively, and the control unit is configured to correspondingly control the synchronous telescopic adjustment of the first electric push rod 1 and the second electric push rod 2 according to the information from the pin shaft sensors 4 on different adjustment mechanisms.

[0025] Wherein, the above-mentioned control unit is electrically connected to the driving device of each single set of driving device, and is used for controlling the start and stop of the drum assembly.

[0026] In another specific embodiment based on the above, the driving device adopts a three-in-one speed reducer 9, and the three-in-one speed reducer 9 is used for connecting and driving the drum assembly to wind and unwind the steel wire rope. In this way, it is convenient to drive and lock the drum assembly. In this solution, the output shaft of the three-in-one speed reducer 9 can be connected to the drum of the drum assembly through a drum coupling, and the pulley 3 is placed at the center of the effective coil of the drum of the drum assembly.

[0027] This invention does not require high positioning accuracy for the vertical pulley. If the accumulated error is large, the speed of the corresponding drum assembly can be adjusted by the absolute encoder in the three-in-one reducer 9, thereby compensating for the change in the corresponding wire rope, so that the lifting device can accurately place and release the box.

[0028] The electrical control system of this invention, consisting of a control unit and a pin sensor 4, can analyze and control the first electric push rod 1 and the second electric push rod 2 in the corresponding movable pulley system as needed by using the readings of the pin sensor 4. This achieves the effect of the pulley 3 being under balanced force, making the wire rope under balanced force, thereby ensuring the stability of the structure during use and extending the service life of the wire rope and pulley.

[0029] This invention can be used in container yards with significant slope variations. High-precision tilt sensors can be added as needed to the four sets of locking components (eight rigging screws) of the spreader to transmit signals to the electronic control system. This causes the three-in-one reducer 9 to continue operating, lowering the wire rope to allow the raised spreader locking components to smoothly enter the container's foot, thus securing the container. The same principle applies to placing containers on sloping ground.

[0030] This invention can reduce the time required for manual leveling of the lifting device, solve the problem of lifting device torsion caused by different variations in the eight lifting wire ropes, and can be adapted to upper lifting frames with different openings.

[0031] As attached Figure 6 and attached Figure 7 As shown, a specific embodiment of this utility model is as follows: Eight single-unit drive units are arranged in a U-shape on the trolley frame, specifically: Of the eight single-unit drive units, the four single-unit drive units located at the four corners of the inner circle of the "U" shape have a drum assembly shaft distance L deviation between the drum and pulley 3 maintained within ±2mm. The four single-unit drive units located at the four corners of the outer circle of the "U" shape have a drum assembly shaft distance S deviation between the drum and pulley 3 maintained within ±2mm. In each single-unit drive unit, the height deviation of the pulley 3 shaft relative to the horizontal plane H1 of the trolley frame is within ±5mm, and the height deviation of the drum assembly shaft relative to the horizontal plane H2 of the trolley frame is within ±5mm. This clause outlines the basic requirements for the overall layout of the eight single-unit drive units, which can be achieved using current control methods employed by various manufacturers.

[0032] In operation, based on the readings of the eight pin sensors 4, the electronic control system makes a judgment and controls the corresponding first electric push rod 1 and second electric push rod 2 to retract the push rod of the pulley 3 with the smaller reading, thus increasing the angle ∠α; conversely, it extends the push rod to decrease the angle ∠α. During the change of ∠α, the readings of the pin sensors 4 change in real time. The electronic control system can calculate the balanced load G / 8 based on the current load G, with a deviation of ±0.2t, to ensure that the force on the eight ropes is within the balanced range. This method is a conventional technique in this field.

[0033] Next, wind eight steel wire ropes of equal length onto a drum and lower it to the ground. Establish a horizontal reference on the ground, cut off any excess wire rope, and connect the wire ropes to the rigging screws on the lifting sling. At this point, all rigging screws should be centered. After installation, begin subsequent adjustments as needed.

[0034] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in this utility model are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0035] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A lifting mechanism for a leveling container spreader, characterized in that: comprising eight single-group driving devices and a trolley frame, wherein the eight single-group driving devices are arranged on the trolley frame in a "hui"-shaped distribution, four of the single-group driving devices are symmetrically distributed at four corners of the inner ring of the "hui" shape in a rectangular form, the other four single-group driving devices are symmetrically distributed at four corners of the outer ring of the "hui" shape in a rectangular form, the trolley frame is respectively provided with vertically through mounting holes at positions corresponding to the four single-group driving devices at the inner ring of the "hui" shape, each single-group driving device comprises a driving assembly, a drum assembly and a movable pulley system, the drum assemblies are respectively mounted on the trolley frame, the driving assembly is used for driving the drum assembly to wind and unwind steel wire ropes, the movable pulley systems at the inner ring of the "hui" shape are mounted at the mounting holes, the mounting holes allow the steel wire ropes to pass through, the movable pulley systems at the outer ring of the "hui" shape are mounted on the side edges of the trolley frame, and the movable pulley systems are used for pulling the steel wire ropes.

2. The lifting mechanism of a leveling container spreader according to claim 1, characterized in that: The movable pulley system comprises an adjusting mechanism and a pulley (3), wherein the adjusting mechanism is used for adjusting the working angle of the pulley (3).

3. The lifting mechanism of a leveling container spreader according to claim 2, characterized in that: The adjusting mechanism comprises a first electric push rod (1), a second electric push rod (2), a first connecting rod (5), a second connecting rod (7) and a pin shaft, the lower ends of the first connecting rod (5) and the second connecting rod (7) of the adjusting mechanism located at the inner ring of the "hui" shape are respectively symmetrically hinged on the inner wall of the corresponding mounting hole, the upper ends extend out of the mounting hole and are jointly connected with the pin shaft, the pulley (3) is rotatably mounted on the pin shaft, one ends of the first electric push rod (1) and the second electric push rod (2) of the adjusting mechanism located at the inner ring of the "hui" shape are respectively symmetrically hinged on the trolley frame, and the other ends are correspondingly hinged to the upper end of the first connecting rod (5) and the upper end of the second connecting rod (7) respectively; the lower ends of the first connecting rod (5) and the second connecting rod (7) of the adjusting mechanism located at the outer ring of the "hui" shape are respectively symmetrically hinged on the side wall of the trolley frame, the upper ends extend to the upper part of the trolley frame and are jointly connected with the pin shaft, the pulley (3) is rotatably mounted on the pin shaft, one ends of the first electric push rod (1) and the second electric push rod (2) of the adjusting mechanism located at the outer ring of the "hui" shape are respectively symmetrically hinged on the trolley frame, and the other ends are correspondingly hinged to the upper end of the first connecting rod (5) and the upper end of the second connecting rod (7) respectively.

4. The lifting mechanism of a leveling container spreader according to claim 3, characterized in that: The adjusting mechanism further comprises a first hinge base (6) and a second hinge base (8), wherein the first connecting rod (5) and the second connecting rod (7) located at the inner ring of the "hui" shape are respectively hinged to the inner wall of the mounting hole through the first hinge base (6) and the second hinge base (8); the first connecting rod (5) and the second connecting rod (7) located at the outer ring of the "hui" shape are respectively hinged to the side wall of the trolley frame through the first hinge base (6) and the second hinge base (8).

5. The lifting mechanism of a leveling container spreader according to claim 3, characterized in that: A pin shaft sensor (4) is further arranged on the pin shaft.

6. The lifting mechanism of a leveling container spreader according to claim 5, characterized in that: The crane further comprises a control unit, wherein the control unit is electrically connected with each pin shaft sensor (4), the first electric push rod (1) and the second electric push rod (2) respectively, and the control unit is used for correspondingly controlling the first electric push rod (1) and the second electric push rod (2) to perform synchronous telescopic adjustment according to information from the pin shaft sensors (4) on different adjusting mechanisms.

7. The lifting mechanism of a leveling container spreader according to claim 6, characterized in that: The control unit is electrically connected with the driving assembly of each single-group driving device, and is used for controlling the start and stop of the drum assembly.

8. The lifting mechanism of a leveling container spreader according to claim 1, characterized in that: The drive device adopts a three-in-one reducer (9), which is used to connect and drive the drum assembly to wind up and unwind the wire rope.

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