Portal crane trolley hook traversing device and method of use thereof

Abstract

The application provides a trolley hook transverse moving device of a portal crane and a use method thereof, and specifically comprises a trolley frame, a lifting mechanism, a transverse moving mechanism and a locking mechanism. The lifting mechanism, the transverse moving mechanism and the locking mechanism are installed on the trolley frame. The steel wire rope of the lifting mechanism is arranged in a winding mode, passes through a winding drum, a movable pulley and a fixed pulley respectively, and a hook is arranged on the movable pulley. The transverse moving mechanism is driven by a driving motor to engage a gear with a rack, so that a pulley frame slides along a guide rail. The guide rail and the rack have the same length and are provided with limiting blocks at both ends. Displacement sensors are arranged at both ends of the pulley frame, so that the hook can be moved to a hook position of a hoisted load. The screw motor of the locking mechanism rotates to drive a locking block to move downward, so that the locking block and the rack are locked, to ensure that the transverse moving mechanism cannot move to both ends due to the traction of the steel wire rope. The gear is driven by the motor to change the distance between the hooks, and the locking mechanism ensures the safety and reliability of hoisting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of crane technology, in particular to a trolley hook transverse moving device of a portal crane and a method for using the same. BACKGROUND

[0002] The portal crane is a kind of hoisting equipment commonly used in the port, and the shipbuilding portal crane is a kind of hoisting equipment commonly used in the shipyard, which usually has an upper trolley and a lower trolley. The upper trolley is provided with a hook at each end, and the lower trolley is provided with only one hook. The three hooks can be used to realize the turning of the segmented ship body and the splicing of the components. Due to the different widths of the ship body, the distance between the two hooks of the upper trolley needs to be adjustable to meet the hoisting and turning of the ship body of different widths.

[0003] In order to solve the above problems, a device is needed to realize the transverse movement of the trolley hook of the crane. For this purpose, the technical personnel have carried out research on the trolley hook transverse moving device of the crane. The invention patent with the publication number "CN101920907B" "Large shipbuilding portal crane main trolley" has the principle that the winding mode of the steel wire rope is changed through the rope arrangement mechanism and the guide pulley, and the movable trolley is moved by the reduction motor to drive the screw rod to move the movable trolley, thereby realizing the transverse movement of the hook. The mechanism realizes the movement of the hook by moving the trolley frame, but the winding of the steel wire rope is complex and easy to cause fatigue failure of the steel wire rope; the transverse moving mechanism is complex, the transmission links are many, and the reliability is greatly reduced.

[0004] The invention patent with the publication number "CN101746669B" "Shipbuilding gantry crane trolley hook transverse moving mechanism" has the principle that the transverse moving drive device is an electric hydraulic push rod, the middle part of the push rod is hinged to the trolley frame, and the top part is hinged to the trolley frame. The transverse moving mechanism can realize the transverse movement of the hook. However, the electric hydraulic push rod is a flexible transmission mechanism, which results in a limited stroke; the hydraulic components are precision components and are used under high pressure, which requires good maintenance; the oil circuit block of the electric hydraulic push rod is designed with a pressure self-locking mechanism, the motor stops rotating, the push rod immediately stays at a certain position, and the pressure oil is in a pressure maintaining state. If internal leakage occurs during hoisting, the spreader will move to the middle, thereby challenging the safety of hoisting. SUMMARY

[0005] In order to solve the existing problems, the present application proposes a trolley hook transverse moving device of a portal crane and a method for using the same, which is used to solve the problems of small transverse moving stroke of the electric hydraulic push rod in the traditional transverse moving mechanism, complex maintenance, and lack of additional safety protection device. The distance between the hooks of the hoisting mechanism is changed by moving the transverse moving mechanism left and right, so that the hook can be moved to the position directly above the hook. The transverse moving mechanism is locked by the locking mechanism, which can ensure that the transverse moving mechanism will not move to both ends due to the traction of the steel wire rope on the hoisting mechanism.

[0006] In order to achieve the above-mentioned purpose, a trolley hook horizontal moving device of a gantry crane is characterized in that the device comprises a trolley frame, a lifting mechanism, a horizontal moving mechanism and a locking mechanism; wherein the lifting mechanism, the horizontal moving mechanism and the locking mechanism are installed on the trolley frame, the horizontal moving mechanism is moved left and right to change the distance between the hooks of the lifting mechanism; the locking mechanism is used for locking the horizontal moving mechanism to ensure that the horizontal moving mechanism will not move to both ends due to the traction of the steel wire rope on the lifting mechanism.

[0007] The lifting mechanism comprises a winding drum, a fixed pulley, a steel wire rope, a movable pulley and a hook; the winding drum is fixedly installed on the trolley frame; the fixed pulley is fixedly installed on the pulley frame of the horizontal moving mechanism; the steel wire rope is wound around the winding drum, the movable pulley and the fixed pulley in sequence; the hook is arranged on the movable pulley.

[0008] The horizontal moving mechanism comprises a guide rail, a rack, a pulley frame, a driving motor, a gear, a limiting block and a displacement sensor one; the guide rail and the rack are fixedly installed on the trolley frame; the pulley frame is installed on the guide rail and can slide along the guide rail; the driving motor is connected to the pulley frame through bolts; the displacement sensor one is fixedly installed on the end of the pulley frame; the gear of the mechanism is engaged with the rack, the driving motor drives the gear to rotate so as to make the pulley frame slide along the guide rail; the guide rail and the rack have the same length, and limiting blocks are arranged at both ends thereof; the displacement sensor one is arranged at both ends of the pulley frame, so that the hook can be moved to the hook position of the hoisted load.

[0009] The locking mechanism comprises a screw motor, a motor mounting seat, a locking block, a displacement sensor two and a limiting switch; the screw motor is connected to the motor mounting seat through bolts; the locking block is fixedly installed on the screw end of the screw motor, and the bottom of the locking block is provided with teeth matched with the rack; the displacement sensor two is arranged at both ends of the locking block to ensure that the teeth of the locking block are engaged with the rack.

[0010] The trolley hook horizontal moving device of the gantry crane is characterized in that the horizontal moving mechanism has two sets and is symmetrically installed at both ends of the trolley frame; the guide rail, the rack, the driving motor and the gear of each set of the horizontal moving mechanism have two groups and are symmetrically arranged at both sides of the pulley frame; the locking mechanism is installed on the four corners of the pulley frame. The trolley hook horizontal moving device of the gantry crane is characterized in that the limiting switch is arranged on the screw motor of the locking mechanism, the screw motor rotates to push the locking block downward, when the teeth of the locking block are engaged with the rack and are pressed, the limiting switch works, and the screw motor stops rotating.

[0011] The use method of the transverse moving device is as follows: first, the driving motor is rotated to rotate the gear on the rack and move along the rack, and the pulley frame slides along the guide rail; the displacement sensor two on the pulley frame acquires the hook position of the hoisted weight, and the hook is moved to the position directly above the hook position of the hoisted weight; second, whether the locking block can be completely engaged with the rack is judged by the displacement sensor two on the locking block, if there is a deviation between the two, the driving motor is rotated to finely adjust the locking block to be completely engaged with the rack; third, the screw motor is rotated to drive the locking block to move downward, when the screw touches the limit switch, the screw motor stops rotating, at this time, the locking block and the rack are locked, so as to ensure that the transverse moving mechanism will not move to both ends due to the traction of the steel wire rope, at this time, the heavy object can be hoisted; fourth, after the hoisting of the heavy object is completed, the screw motor is reversed to drive the locking block to move upward, when the screw touches the limit switch, the screw motor stops rotating, at this time, the locking block and the rack are unlocked; fifth, the above-mentioned actions are repeated, so that the distance between the hooks can be changed to meet the safe hoisting of heavy objects of different widths.

[0012] Compared with the prior art, the transverse moving device of the trolley hook of the gantry crane has the beneficial effects that:

[0013] ①The transverse moving distance is large. The stroke of the transverse moving mechanism depends on the length of the guide rail and the rack, and a large distance adjustment of the distance between the hooks can be realized by lengthening the guide rail and the rack.

[0014] ②It is safe and reliable. The locking block is locked by the meshing of the gear and the rack, so that the transverse moving mechanism will not move to both ends due to the traction of the steel wire rope during hoisting.

[0015] ③It is convenient to maintain and replace parts. The parts are connected by bolts, so that it is convenient to maintain and replace parts. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure schematic view when the hook of the present application moves to the maximum distance position.

[0017] Figure 2 is the overall structure schematic view when the hook of the present application moves to the minimum distance position.

[0018] Figure 3 is the top view of the transverse moving mechanism of the present application.

[0019] Figure 4 is the front view of the transverse moving mechanism of the present application.

[0020] Figure 5 is the left view of the transverse moving mechanism of the present application.

[0021] Figure 6 is the locking schematic view of the locking mechanism of the present application.

[0022] Figure 7 Figure 1 is a schematic diagram of the locking mechanism of the present application.

[0023] Figure 1 is a schematic diagram of the locking mechanism of the present application. Figures 1 to 7 Figure 1 is a schematic diagram of the locking mechanism of the present application. DETAILED DESCRIPTION

[0024] The technical solutions of the present application are further described below in combination with the drawings.

[0025] The trolley hook horizontal moving device of the portal crane comprises a trolley frame 1, a lifting mechanism 2, a horizontal moving mechanism 3 and a locking mechanism 4. The lifting mechanism 2 comprises a winding drum 2-1, a fixed pulley 2-2, a steel wire rope 2-3, a movable pulley 2-4 and a hook 2-5. The horizontal moving mechanism 3 comprises a guide rail 3-1, a rack 3-2, a pulley frame 3-3, a driving motor 3-4, a gear 3-5, a limiting block 3-6 and a displacement sensor 3-7. The locking mechanism 4 comprises a screw motor 4-1, a motor mounting seat 4-2, a locking block 4-3, a displacement sensor 4-4 and a limiting switch 4-5.

[0026] The trolley hook horizontal moving device of the portal crane is installed on the trolley frame 1, and the lifting mechanism 2 is moved left and right to change the distance between the hooks 2-5. The locking mechanism 4 is used to lock the horizontal moving mechanism 3 to prevent the horizontal moving mechanism 3 from moving to both ends due to the traction of the steel wire rope 2-3 of the lifting mechanism 2.

[0027] The winding drum 2-1 is fixedly installed on the trolley frame 1. The fixed pulley 2-2 is fixedly installed on the pulley frame 3-3. The steel wire rope 2-3 is wound around the winding drum 2-1, the movable pulley 2-4 and the fixed pulley 2-2 in sequence. The hook 2-5 is arranged on the movable pulley 2-4.

[0028] The guide rail 3-1 and the rack 3-2 are fixedly installed on the trolley frame 1; the pulley frame 3-3 is installed on the guide rail 3-1 and can slide along the guide rail 3-1; the driving motor 3-4 is connected with the pulley frame 3-3 through bolts; the displacement sensor one 3-7 is fixedly installed on the end of the pulley frame 3-3; the gear 3-5 of the mechanism is engaged with the rack 3-2, the gear 3-5 is driven to rotate by the driving motor 3-4, so that the pulley frame 3-3 slides along the guide rail 3-1; the guide rail 3-1 and the rack 3-2 are consistent in length, and the both ends are provided with limit blocks 3-6; the pulley frame 3-3 is provided with the displacement sensor one 3-7 at both ends, so that the lifting hook 2-5 can be moved to the hook position of the lifting weight.

[0029] The screw motor 4-1 is connected on the motor mounting seat 4-2 through bolts, the locking block 4-3 is fixedly installed on the screw end of the screw motor 4-1, and the bottom of the locking block 4-3 is provided with the gear teeth matched with the rack 3-2; the both ends of the locking block 4-3 are respectively provided with the displacement sensor two 4-4, so as to ensure that the gear teeth of the locking block 4-3 are engaged with the rack 3-2.

[0030] The transverse moving mechanism 3 has two sets, which are symmetrically installed at both ends of the trolley frame 1; the guide rail 3-1, the rack 3-2, the driving motor 3-4 and the gear 3-5 of each set of transverse moving mechanism 3 have two groups, which are symmetrically arranged on both sides of the pulley frame 3-3; the locking mechanism 4 is installed on the four corners of the pulley frame 3-3.

[0031] The limiting switch 4-5 is arranged on the screw motor 4-1 in the locking mechanism 4, the screw motor 4-1 rotates to push the locking block 4-3 to move downward, when the gear teeth of the locking block 4-3 are engaged with the rack 3-2 and are pressed tightly, the limiting switch 4-5 works, and the screw motor 4-1 stops rotating.

[0032] The method for using the horizontal moving device is as follows: first, the driving motor 3-4 is rotated to make the gear 3-5 rotate on and move along the rack 3-2, and the pulley frame 3-3 slides along the guide rail 3-1; the displacement sensor 1 3-7 on the pulley frame 3-3 obtains the hook position of the hoist, so that the hook 2-5 moves directly above the hoist hook position; second, the displacement sensor 2 4-4 on the locking block 4-3 is used to determine whether the locking block 4-3 can be completely engaged with the rack 3-2, if there is a deviation between the two, the driving motor 3-4 is rotated to fine-tune so that the locking block 4-3 is completely engaged with the rack 3-2; third, the screw motor 4-1 is rotated to drive the locking block 4-3 to move downward, when the screw touches the limit switch 4-5, the screw motor 4-1 stops rotating, at this time, the locking block 4-3 and the rack 3-2 are locked, so as to ensure that the horizontal moving mechanism 3 will not move to both ends due to the traction of the steel wire rope 2-3, at this time, the heavy object can be lifted; fourth, after the hoisting of the heavy object is completed, the screw motor 4-1 is reversed to drive the locking block 4-3 to move upward, when the screw touches the limit switch 4-5, the screw motor 4-1 stops rotating, at this time, the locking block 4-3 and the rack 3-2 are unlocked; fifth, the above-mentioned actions are repeated, so that the distance between the hooks 2-5 can be changed to meet the safe hoisting of heavy objects of different widths.

[0033] The above examples are only specific examples for further detailing the purposes, technical solutions and beneficial effects of the present application, and the present application is not limited to this. Any equivalent replacement, modification, etc. within the disclosed range of the present application is included in the protection scope of the present application.

Claims

1. A lateral movement device for the hook of a gantry crane, characterized in that: The device includes a trolley frame (1), a lifting mechanism (2), a lateral movement mechanism (3), and a locking mechanism (4); wherein the lifting mechanism (2), the lateral movement mechanism (3), and the locking mechanism (4) are mounted on the trolley frame (1), and the distance between the hooks (2-5) of the lifting mechanism (2) is changed by the left and right movement of the lateral movement mechanism (3); the locking mechanism (4) is used to lock the lateral movement mechanism (3) to ensure that the lateral movement mechanism (3) will not move to either end due to the traction of the wire rope (2-3) on the lifting mechanism (2); The lifting mechanism (2) includes: a drum (2-1), a fixed pulley (2-2), a wire rope (2-3), a movable pulley (2-4), and a hook (2-5); the drum (2-1) is fixedly installed on the trolley frame (1); the fixed pulley (2-2) is fixedly installed on the pulley frame (3-3) of the transverse mechanism (3); the wire rope (2-3) passes through the drum (2-1), the movable pulley (2-4), and the fixed pulley (2-2) in a clockwise winding manner; the hook (2-5) is set on the movable pulley (2-4); The lateral movement mechanism (3) includes: a guide rail (3-1), a rack (3-2), a pulley frame (3-3), a drive motor (3-4), a gear (3-5), a limit block (3-6), and a displacement sensor (3-7); the guide rail (3-1) and the rack (3-2) are fixedly mounted on the trolley frame (1); the pulley frame (3-3) is mounted on the guide rail (3-1) and can slide along the guide rail (3-1); the drive motor (3-4) is connected to the pulley frame (3-3) by bolts; the displacement sensor... Device 1 (3-7) is fixedly installed at the end of the pulley frame (3-3); the gear (3-5) meshes with the rack (3-2), and the drive motor (3-4) drives the gear (3-5) to rotate, thereby causing the pulley frame (3-3) to slide along the guide rail (3-1); the guide rail (3-1) and the rack (3-2) have the same length, and both ends are provided with limit blocks (3-6); both ends of the pulley frame (3-3) are provided with displacement sensors 1 (3-7), which can move the hook (2-5) to the hook position of the suspended weight; The locking mechanism (4) includes: a screw motor (4-1), a motor mounting base (4-2), a locking block (4-3), a displacement sensor (4-4), and a limit switch (4-5); the screw motor (4-1) is bolted to the motor mounting base (4-2); the locking block (4-3) is fixedly installed on the screw end of the screw motor (4-1), and the bottom of the locking block (4-3) has gear teeth that cooperate with the rack (3-2); the locking block (4-3) Displacement sensors 2 (4-4) are installed at both ends of the locking block (4-3) to ensure that the teeth of the locking block (4-3) mesh with the rack (3-2); the screw motor (4-1) in the locking mechanism (4) is equipped with a limit switch (4-5). The screw motor (4-1) rotates and pushes the locking block (4-3) down. When the teeth of the locking block (4-3) mesh with the rack (3-2) and are pressed together, the limit switch (4-5) works and the screw motor (4-1) stops rotating.

2. The lateral movement device for the hook of the gantry crane as described in claim 1, characterized in that: The transverse mechanism (3) has two sets, which are symmetrically installed at both ends of the trolley frame (1); each set of transverse mechanism (3) has two sets of guide rails (3-1), racks (3-2), drive motors (3-4) and gears (3-5), which are symmetrically arranged on both sides of the pulley frame (3-3); locking mechanisms (4) are installed at the four corners of the pulley frame (3-3).

3. A lateral movement device for the hook of a gantry crane according to any one of claims 1-2, characterized in that: The method of using the transverse movement device is as follows: First, the drive motor (3-4) rotates, causing the gear (3-5) to rotate on the rack (3-2) and move along it, carrying the pulley frame (3-3) to slide along the guide rail (3-1); the displacement sensor one (3-7) on the pulley frame (3-3) obtains the position of the hook of the suspended load, causing the hook (2-5) to move directly above the position of the hook of the suspended load; Second, the displacement sensor two (4-4) on the locking block (4-3) determines whether the locking block (4-3) can fully engage with the rack (3-2). If there is a deviation between the two, the drive motor (3-4) rotates to fine-tune so that the locking block (4-3) and the rack (3-2) are fully engaged; Third, the screw motor (4-1) rotates. The locking block (4-3) moves downward. When the screw touches the limit switch (4-5), the screw motor (4-1) stops rotating. At this time, the locking block (4-3) and the rack (3-2) are locked to ensure that the transverse mechanism (3) will not move to both ends due to the traction of the wire rope (2-3). At this time, the heavy object can be lifted. In the fourth step, after the heavy object is lifted, the screw motor (4-1) reverses and drives the locking block (4-3) to move upward. When the screw touches the limit switch (4-5), the screw motor (4-1) stops rotating. At this time, the locking block (4-3) and the rack (3-2) are unlocked. In the fifth step, the actions of the first to fourth steps are repeated to realize the change of the distance of the hook (2-5) to meet the safe lifting of different widths of the load.

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