Tower crane with amplitude adjustment mechanism

Abstract

The present application belongs to the technical field of crane, disclose a kind of tower crane with amplitude debugging mechanism.The tower crane with amplitude debugging mechanism, including tower body, the top of the tower body is equipped with rotary platform, the rotary platform is equipped with hoist arm assembly, the hoist arm assembly one side is equipped with counterweight, the downside of the other side of hoist arm assembly is equipped with amplitude trolley.The tower crane with amplitude debugging mechanism, using the design of amplitude debugging mechanism, adopt double drum design, respectively handle the operation of steel cable two ends, by amplitude motor unified control, ensure the synchronous rotation of both, and cooperate the design of clean guiding mechanism, can be guided on slide rail by helical rib in the process of drum rotation, ensure that steel cable can pass through guiding hole straight in and out, simultaneously cooperate helical guiding rib can ensure that steel cable is orderly wound, avoid the situation that steel cable is separated from drum or mutually stacked, solve the problem in background technology.

Description

Technical Field

[0001] This invention relates to the technical field of cranes, specifically to a tower crane with an amplitude adjustment mechanism. Background Technology

[0002] Tower cranes, also known as tower hoists, originated in Western Europe. They are rotating cranes with the boom mounted on the upper part of a tall tower. They have a large working space and are mainly used for the vertical and horizontal transportation of materials and the installation of building components in building construction. The metal structure includes the tower body, boom, and base. The working mechanism consists of four parts: hoisting, luffing, slewing, and traveling. The electrical system includes motors, controllers, distribution cabinets, connecting lines, signal and lighting devices, etc.

[0003] Existing luffing mechanisms rely on the rotation of a drum to drive a steel cable, which in turn moves the luffing trolley. Typically, both ends of the steel cable are fixed to the same drum and wound around it. As the drum rotates, the luffing trolley moves accordingly to adjust the amplitude. However, this design causes the angle between the steel cable and the distal pulley to constantly change during winding or unwinding, preventing it from moving straight in and out. This results in unnecessary wear. Furthermore, the change in angle also alters the direction of the tension, requiring the steel cable to withstand greater tension. During use, the grease on the surface of the steel cable absorbs a large amount of dirt and moisture. If not cleaned regularly, this can cause corrosion and wear, affecting its service life. To address these issues, this application provides a tower crane with an amplitude adjustment mechanism. Summary of the Invention

[0004] The purpose of this invention is to provide a tower crane with an amplitude adjustment mechanism. This tower crane with an amplitude adjustment mechanism adopts a double drum design to achieve straight in and straight out of the steel cable, avoiding damage to the steel cable due to torque changes, and also enabling maintenance of the steel cable.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a tower crane with an amplitude adjustment mechanism, comprising a tower body, a slewing platform at the top of the tower body, a boom assembly mounted on the slewing platform, a counterweight on one side of the boom assembly, a luffing trolley on the lower side of the other side of the boom assembly, and an amplitude adjustment mechanism on the boom assembly for controlling the luffing trolley.

[0006] The amplitude adjustment mechanism includes a mounting base, slide rails, sliders, U-shaped plates, drive wheels, a top plate, a hoisting mechanism, a luffing motor, and a cleaning guide mechanism. The mounting base is fixedly mounted on the boom assembly. Two slide rails are symmetrically mounted on the upper surface of the mounting base. Sliders are slidably connected within the slide rails. U-shaped plates are fixedly connected to the upper surfaces of both sliders. Hoisting mechanisms are movably mounted within both U-shaped plates. The upper surfaces of the two U-shaped plates are connected by a top plate. A luffing motor is fixedly mounted on the upper surface of the top plate. A drive wheel is fixedly mounted on the output end of the luffing motor for driving the hoisting mechanisms. One end of a steel cable is fixedly wound around each of the two hoisting mechanisms. A cleaning guide mechanism is provided on the upper surface of the mounting base between the two slide rails.

[0007] Preferably, the hoisting mechanism includes a drum, a spiral guide rib, and driven wheels. The spiral guide rib is disposed on the outer side of the drum for guiding the winding of the steel cable. The driven wheels are installed at one end of the drum and are located outside the U-shaped plate. The two driven wheels are connected to the driving wheel via belt drive.

[0008] Preferably, the cleaning guide mechanism includes a control box, upright plates, guide rollers, spiral ribs, brush bristles, conversion rollers, conversion motors, oil supply brushes, cleaning brushes, an inlet, a drawer plate, and a box body. The control box is fixedly connected to the upper surface of the mounting base and is located between two slide rails. Upright plates are fixedly connected to both ends of the top opening of the control box. The guide roller is fixedly connected between the two upright plates. Spiral ribs are provided on the side wall of the guide roller, and brush bristles are provided on the outer side of the spiral ribs. A conversion roller is movably connected inside the control box. A conversion motor is provided on one side of the control box. The conversion motor is fixedly connected to one end of the conversion roller for driving. Several oil supply brushes are provided at equal intervals on the conversion roller. Several cleaning brushes are provided at equal intervals on the side of the conversion roller away from the oil supply brushes, and the oil supply brushes and cleaning brushes are arranged alternately. An inlet is opened on one side of the control box, and a drawer plate is inserted into the inlet. Several box bodies are provided on the upper surface of the drawer plate.

[0009] Preferably, the cross-section of the box is semi-circular and its center coincides with the axis of the conversion roller. The number of boxes is the same as the number of oil supply brushes and dirt removal brushes. Adjacent boxes are directly attached and arranged along the axial direction of the conversion roller. The bottom wall of the box corresponding to the dirt removal brush is provided with dirt removal needles, and the box corresponding to the oil supply brush is filled with lubricating grease.

[0010] The cleaning of the steel cable should be carried out at the end of the work. First, use a cleaning brush to remove dirt, and then use an oil brush to apply grease. To ensure thorough cleaning, the hoisting mechanism should be used to perform multiple full cable winding and unwinding operations.

[0011] Preferably, the spiral guide ribs and the spiral ribs mesh together so that the drum can move along the axial direction of the conversion roller when it rotates.

[0012] With the guide roller in a fixed position, as the spiral guide rib rotates, the steel cable on the drum is continuously brushed by the bristles on the spiral rib to remove oil stains.

[0013] Preferably, guide plates are fixedly connected to the upper surface of the mounting base and to both the front and rear sides of the two winches. A guide hole is provided in the middle of the guide plate, and a rubber scraper is provided at the bottom of the guide hole. The rubber scraper is in a three-quarter ring shape and can partially wrap the steel cable. The two guide plates are parallel to each other, and the axis of the wire hole should be perpendicular to the axis of the drum.

[0014] The design of the rubber scraper ensures that the oil on the steel cable is squeezed and collected when the cable passes through the guide hole, so that the oil is on the outside when the cable is wound on the drum, making it easy to clean.

[0015] Preferably, the axial direction of the guide hole coincides with the central axis of the mounting base, and the length of the slide rail is twice the length of the drum.

[0016] The length design of the slide rail allows the drum to have sufficient range of motion to ensure adequate cleaning of the steel cable.

[0017] Preferably, a steering motor is installed on the outer side of the upright plate, a square groove is opened at one end of the guide roller near the steering motor, a square rod is fixedly connected to the output end of the steering motor and inserted into the square groove, a screw is fixedly connected to the other end of the guide roller, and a screw hole is opened on the upright plate at the position corresponding to the screw, and the screw is threaded into the screw hole.

[0018] By adopting the aforementioned technical solution, the beneficial effects of the present invention are:

[0019] 1. This tower crane with an amplitude adjustment mechanism utilizes a double-drum design to handle the winding and unwinding operations of the steel cable at both ends, which are uniformly controlled by a variable amplitude motor, ensuring synchronous rotation of both. In addition, with the design of a cleaning guide mechanism, the steel cable can move on the slide rail under the guidance of the spiral ribs during the rotation of the drum, ensuring that the steel cable can pass straight in and out through the guide hole. At the same time, the spiral guide ribs can ensure that the steel cable is wound in an orderly manner, avoiding the situation where the steel cable detaches from the drum or stacks on each other, thus solving the problems mentioned in the background technology.

[0020] 2. This tower crane with an amplitude adjustment mechanism utilizes a cleaning guide mechanism design. During the drum rotation, the cleaning brush can remove dirt from the surface of the steel cable. When the conversion motor rotates and the cleaning brush enters the housing, the cleaning needle can peel off the oil on the cleaning brush and make it fall into the housing. At the same time, the oil supply brush will bring lubricant into contact with the steel cable to oil and maintain the steel cable. The design of the rubber scraper ensures that the oil on the steel cable is squeezed and collected, so that the oil is on the outside when the steel cable is wound on the drum, making it easy to clean. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the amplitude adjustment mechanism of the present invention;

[0023] Figure 3 This is a right view of the present invention;

[0024] Figure 4 This is a top view of the present invention;

[0025] Figure 5 For the present invention Figure 4 AA section diagram;

[0026] Figure 6 This is a schematic diagram of the structure of the spiral guide rib and spiral rib of the present invention.

[0027] In the diagram: 1. Tower body, 2. Slewing platform, 3. Lifting boom assembly, 4. Counterweight, 5. Luffing trolley, 6. Amplitude adjustment mechanism, 61. Mounting base, 62. Slide rail, 63. Slider, 64. U-shaped plate, 65. Drive wheel, 66. Top plate, 67. Winch mechanism, 671. Drum, 672. Spiral guide rib, 673. Driven wheel, 68. Luffing motor, 69. Cleaning guide mechanism, 691. Control box, 692. Vertical plate, 693. Guide roller, 694. Spiral rib, 695. Brush bristles, 696. Converter roller, 697. Converter motor, 698. Oil supply brush, 699. Stain removal brush, 6910. Inlet, 6911. Drawer plate, 6912. Box body, 7. Stain removal needle, 8. Guide plate, 9. Guide hole, 10. Rubber scraper. Detailed Implementation

[0028] Please see Figure 1-6 The present invention provides a technical solution: a tower crane with an amplitude adjustment mechanism, including a tower body 1, a slewing platform 2 at the top of the tower body 1, a boom assembly 3 mounted on the slewing platform 2, a counterweight block 4 on one side of the boom assembly 3, a luffing trolley 5 on the lower side of the other side of the boom assembly 3, and an amplitude adjustment mechanism 6 on the boom assembly 3 for controlling the luffing trolley 5;

[0029] The amplitude adjustment mechanism 6 includes a mounting base 61, slide rails 62, sliders 63, U-shaped plates 64, drive wheels 65, top plates 66, hoisting mechanisms 67, luffing motors 68, and cleaning guide mechanisms 69. The mounting base 61 is fixedly mounted on the boom assembly 3. Two slide rails 62 are symmetrically mounted on the upper surface of the mounting base 61. Sliders 63 are slidably connected inside the slide rails 62. U-shaped plates 64 are fixedly connected to the upper surfaces of the two sliders 63. Hoisting mechanisms 67 are movably mounted inside the two U-shaped plates 64. The upper surfaces of the two U-shaped plates 64 are connected by the top plate 66. The luffing motor 68 is fixedly mounted on the upper surface of the top plate 66. The output end of the luffing motor 68 is fixedly mounted with a drive wheel 65 for driving the hoisting mechanisms 67. One end of a steel cable is fixedly wound around each of the two hoisting mechanisms 67. A cleaning guide mechanism 69 is provided on the upper surface of the mounting base 61 between the two slide rails 62.

[0030] The hoisting mechanism 67 includes a drum 671, a spiral guide rib 672, and a driven wheel 673. The spiral guide rib 672 is provided on the outer side of the drum 671 for guiding the winding of the steel cable. The driven wheel 673 is installed at one end of the drum 671 and is located outside the U-shaped plate 64. The two driven wheels 673 are connected to the driving wheel 65 by belt drive.

[0031] The cleaning guide mechanism 69 includes a control box 691, a vertical plate 692, a guide roller 693, spiral ribs 694, brush bristles 695, a conversion roller 696, a conversion motor 697, an oil supply brush 698, a stain removal brush 699, an inlet 6910, a drawer 6911, and a box body 6912. The control box 691 is fixedly connected to the upper surface of the mounting base 61 and is located between two slide rails 62. The left and right ends of the top opening of the control box 691 are fixedly connected to the vertical plate 692. The guide roller 693 is fixedly connected between the two vertical plates 692. The side wall of the guide roller 693 is provided with spiral ribs 694, and the outer side of the spiral ribs 694 is provided with brush bristles 695. The conversion roller 696 is movably connected inside the control box 691. A conversion motor 697 is provided on one side of the control box 691. The conversion motor 697 is fixedly connected to one end of the conversion roller 696 for driving. Several oil supply brushes 698 are provided at equal intervals on the conversion roller 696. Several cleaning brushes 699 are provided at equal intervals on the side of the conversion roller 696 away from the oil supply brushes 698. The oil supply brushes 698 and cleaning brushes 699 are arranged alternately. When the cleaning brushes 699 and the oil supply brushes 698 move to the top, they can contact the bristles 695. The cleaning brushes 698 are made of steel brushes, which have a certain hardness and flexibility, which helps to remove oil stains. An inlet 6910 is opened on one side of the control box 691. A drawer plate 6911 is inserted into the inlet 6910. Several boxes 6912 are provided on the upper surface of the drawer plate 6911.

[0032] By utilizing the design of the amplitude adjustment mechanism 6, a double-drum design is adopted to handle the winding and unwinding operations at both ends of the steel cable, which are uniformly controlled by the variable amplitude motor 68 to ensure synchronous rotation of the two. In conjunction with the design of the cleaning guide mechanism 69, the drum 671 can be guided by the spiral rib 694 to move on the slide rail 62 during rotation, ensuring that the steel cable can pass straight in and out through the guide hole. At the same time, the spiral guide rib 672 can ensure that the steel cable is wound in an orderly manner, avoiding the situation where the steel cable detaches from the drum 671 or stacks on top of each other, thus solving the problems mentioned in the background technology.

[0033] The cross-section of the box 6912 is semi-circular and its center coincides with the axis of the conversion roller 696. The number of boxes 6912 is the same as the number of oil supply brushes 698 and cleaning brushes 699. Adjacent boxes 6912 are directly attached and arranged along the axial direction of the conversion roller 696. The bottom wall of the box 6912 corresponding to the cleaning brush 699 is provided with cleaning needles 7. The cleaning needles 7 are evenly distributed and can quickly scrape off the oil stains on the cleaning brush 699. The box 6912 corresponding to the oil supply brush 698 is filled with lubricating grease.

[0034] The cleaning operation of the steel cable should be carried out at the end of the work. First, use the cleaning brush 699 to remove dirt, and then use the oil supply brush 698 to apply grease. To ensure thorough cleaning, the hoisting mechanism 67 needs to be used to complete multiple full cable winding and unwinding operations.

[0035] The engagement of the spiral guide rib 672 and the spiral rib 694 allows the drum 671 to move axially along the conversion roller 696 when it rotates.

[0036] When the guide roller 693 is in a fixed state, the steel cable on the drum 671 will be continuously brushed by the bristles 695 on the spiral guide 694 during the rotation of the spiral guide 672, thus removing the oil stains.

[0037] Guide plates 8 are fixedly connected to the upper surface of the mounting base 61 and to both the front and rear sides of the two winch mechanisms 67. A guide hole 9 is provided in the middle of the guide plate 8, and a rubber scraper 10 is provided at the bottom of the guide hole 9. The rubber scraper 10 is in a three-quarter ring shape and can partially wrap the steel cable. The two guide plates 8 are parallel to each other, and the axis of the wire hole 9 should be perpendicular to the axis of the drum 671.

[0038] By utilizing the design of the rubber scraper 10, when the steel cable passes through the guide hole 9, the design of the rubber scraper 10 can ensure that the oil on the steel cable is squeezed and collected, so that when the steel cable is wound on the drum 671, the oil is on the outside, making it easy to clean.

[0039] Utilizing the design of the cleaning guide mechanism 69, during the rotation of the drum 671, the cleaning brush 699 can remove dirt from the surface of the steel cable. When the conversion motor 697 rotates and the cleaning brush 699 enters the housing 6912, the cleaning needle 7 can peel off the oil on the cleaning brush 699 and let it fall into the housing 6912. At the same time, the oil supply brush 698 will bring lubricant into contact with the steel cable to oil and maintain the steel cable. Meanwhile, the design of the rubber scraper 10 can ensure that the oil on the steel cable is squeezed and collected, so that when the steel cable is wound on the drum 671, the oil is on the outside, which is convenient for cleaning.

[0040] The axial direction of the guide hole 9 coincides with the central axis of the mounting base 61, and the length of the slide rail 62 is twice the length of the drum 671.

[0041] The length design of the slide rail 62 allows the drum 671 to have sufficient range of motion to ensure adequate cleaning of the steel cable.

[0042] A steering motor 11 is installed on the outer side of the upright plate 692. A square groove 12 is opened at one end of the guide roller 693 near the steering motor 11. A square rod 13 is fixedly connected to the output end of the steering motor 11 and inserted into the square groove 12. A screw 14 is fixedly connected to the other end of the guide roller 693. A screw hole 15 is opened on the upper part of the upright plate 692 corresponding to the position of the screw 14, and the screw 14 is threadedly connected in the screw hole 15. The steering motor 11 drives the screw 14 to move in the screw hole 15, which enables the guide roller 693 to move axially. It should be ensured that the pitch of the screw is the same as the pitch of the thread rib 694. The adjustment effect should ensure that the connection between the thread rib 694 and the threaded guide rib 672 will not deviate when the thread rotates.

[0043] When the luffing motor 68 is locked, the rotation of the guide roller 693 will not affect the drum 671. The movement of the guide roller 693 is cleaned by the cleaning brush 699 and its bristles 695, or the rotating conversion roller 696 is oiled by the oil supply brush 698. When the luffing motor 68 is working, the steering motor 11 must be locked to prevent the guide roller 693 from rotating, so that the amplitude adjustment mechanism 6 can function.

[0044] When the tower crane with amplitude adjustment mechanism is working, the amplitude adjustment of the luffing trolley 5 is performed by using the luffing motor 68 to drive the drum 671 to rotate. The steel cable winding and unwinding drives the luffing trolley 5 to move. At this time, guided by the rotation of the spiral rib 694 and the spiral guide rib 672, the U-shaped plate 64 moves on the slide rail 62 to adjust its position, ensuring that the angle between the steel cable and the far end slide rail remains unchanged, maintaining a straight-in and straight-out state, and avoiding torque changes. During this process, the brush 695 can continuously brush away and collect dirt on the surface of the steel cable.

[0045] After the crane completes a day's work, the steel cable can be lubricated. The hoisting mechanism 67 is used to perform multiple full cable winding and unwinding operations. First, the cleaning brush 699 is used to remove dirt, and the oil is collected in the box 6912. Then, the oil supply brush 698 is used to apply grease to maintain the steel cable.

[0046] Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tower crane with an amplitude adjustment mechanism, comprising a tower body (1), a slewing platform (2) at the top of the tower body (1), and a boom assembly (3) mounted on the slewing platform (2), characterized in that: The boom assembly (3) is provided with a counterweight (4) on one side and a luffing trolley (5) on the lower side of the other side. The boom assembly (3) is also provided with an amplitude adjustment mechanism (6) for controlling the luffing trolley (5). The amplitude adjustment mechanism (6) includes a mounting base (61), slide rails (62), sliders (63), U-shaped plates (64), drive wheels (65), top plates (66), a hoisting mechanism (67), a variable amplitude motor (68), and a cleaning guide mechanism (69). The mounting base (61) is fixedly mounted on the boom assembly (3). Two slide rails (62) are symmetrically mounted on the upper surface of the mounting base (61). Sliders (63) are slidably connected inside the slide rails (62). U-shaped plates are fixedly connected to the upper surfaces of the two sliders (63). The two U-shaped plates (64) are each equipped with a winch mechanism (67). The upper surfaces of the two U-shaped plates (64) are connected by a top plate (66). A variable amplitude motor (68) is fixedly installed on the upper surface of the top plate (66). A drive wheel (65) is fixedly installed at the output end of the variable amplitude motor (68) for driving the winch mechanism (67). The two winch mechanisms (67) are respectively fixed with one end of a steel cable. A cleaning guide mechanism (69) is provided on the upper surface of the mounting base (61) between the two slide rails (62). The hoisting mechanism (67) includes a drum (671), a spiral guide rib (672), and a driven wheel (673). The spiral guide rib (672) is provided on the outer side of the drum (671) for guiding the winding of the steel cable. The driven wheel (673) is installed at one end of the drum (671) and is located outside the U-shaped plate (64). The two driven wheels (673) are connected to the driving wheel (65) by belt drive. The cleaning guide mechanism (69) includes a control box (691), a vertical plate (692), a guide roller (693), a spiral rib (694), bristles (695), a conversion roller (696), a conversion motor (697), an oil supply brush (698), a stain removal brush (699), an inlet (6910), a drawer (6911), and a box body (6912). The control box (691) is fixedly connected to the upper surface of the mounting base (61) and is located between two slide rails (62). The left and right ends of the top opening of the control box (691) are fixedly connected to the vertical plate (692). The guide roller (693) is located between the two vertical plates (692). The guide roller (693) has a spiral rib (694) on its side wall. The outer side of the spiral rib (694) The control box (691) is equipped with brush bristles (695), and a conversion roller (696) is movably connected inside the control box (691). A conversion motor (697) is provided on one side of the control box (691). The conversion motor (697) is fixedly connected to one end of the conversion roller (696) for driving. Several oil supply brushes (698) are provided at equal intervals on the conversion roller (696). Several cleaning brushes (699) are provided at equal intervals on the side of the conversion roller (696) away from the oil supply brushes (698). The oil supply brushes (698) and cleaning brushes (699) are arranged alternately. An inlet (6910) is opened on one side of the control box (691). A drawer plate (6911) is inserted into the inlet (6910). Several boxes (6912) are provided on the upper surface of the drawer plate (6911). The engagement of the spiral guide rib (672) and the spiral rib (694) allows the drum (671) to move axially along the change roller (696) when it rotates.

2. A tower crane with an amplitude adjustment mechanism according to claim 1, characterized in that: The cross-section of the box (6912) is semi-circular and its center coincides with the axis of the conversion roller (696). The number of boxes (6912) is the same as the number of oil supply brushes (698) and cleaning brushes (699). Adjacent boxes (6912) are directly attached and arranged along the axial direction of the conversion roller (696). The bottom wall of the box (6912) corresponding to the cleaning brush (699) is provided with cleaning needles (7). The box (6912) corresponding to the oil supply brush (698) is filled with lubricating grease.

3. A tower crane with an amplitude adjustment mechanism according to claim 2, characterized in that: Guide plates (8) are fixedly connected to the upper surface of the mounting base (61) and to the front and rear sides of the two winches (67). A guide hole (9) is provided in the middle of the guide plate (8), and a rubber scraper (10) is provided at the bottom of the guide hole (9). The rubber scraper (10) is in a three-quarter ring shape and can partially wrap the steel cable.

4. A tower crane with an amplitude adjustment mechanism according to claim 3, characterized in that: The axial direction of the guide hole (9) coincides with the central axis of the mounting base (61), and the length of the slide rail (62) is twice the length of the drum (671).

5. A tower crane with an amplitude adjustment mechanism according to claim 4, characterized in that: A steering motor (11) is installed on the outside of the upright plate (692). A square groove (12) is opened at one end of the guide roller (693) near the steering motor (11). A square rod (13) is fixedly connected to the output end of the steering motor (11) and inserted into the square groove (12). A screw (14) is fixedly connected to the other end of the guide roller (693). A screw hole (15) is opened on the upper part of the upright plate (692) corresponding to the position of the screw (14), and the screw (14) is threaded into the screw hole (15).

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