Pulley type cantilever crane

Abstract

The utility model discloses a pulley type cantilever crane which comprises an upright post, a connecting shell and a self-checking pulley mechanism, the upper end of the stand column is rotatably connected with a rotating drum, the outer arc surface of the rotating drum is provided with a rotating arm, the lower end of the rotating arm is transversely and slidably connected with a sliding frame plate, the lower end of the sliding frame plate is rotatably connected with a winding drum through a rotating shaft, the outer arc surface of the winding drum is wound with a steel wire rope, and the front end of the steel wire rope is fixedly connected with the winding drum; the rear end of the steel wire rope is fixedly connected with the sliding frame plate; a lifting hook is mounted at the lower end in the connecting shell; according to the pulley type cantilever crane, whether a pulley part needs to be lubricated or not is automatically detected, so that lubricating oil is added to the pulley part of the cantilever crane more timely, and the situation that the working abrasion of the cantilever crane is increased due to the fact that the lubricating oil is not timely is avoided; and the service life of the cantilever crane is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of cantilever cranes, in particular to a pulley type cantilever crane. Background Art

[0002] The cantilever crane is an industrial component and a light-duty crane. It is composed of a column, a slewing arm slewing drive device and an electric hoist. It has light weight, a large span, a large lifting capacity, is economical and durable, and is widely used in many industrial fields. It can quickly and efficiently complete a large number of object handling and ground work tasks. In the prior art, among the various components of the cantilever crane, the pulley is one of the indispensable components, which can help lift the heavy objects through ropes or steel cables and put the heavy objects down smoothly. At the same time, the pulley component is often installed on the upper end of the hook and moves up and down with the hook. Through the principle of the movable pulley, the force required for lifting the object can be reduced. However, with the frequent use of the cantilever crane, the lubricating oil for the pulley component will be added more frequently. When the lubricating oil is not added in time, the friction force of the pulley component when it rotates will increase, resulting in increased wear during the operation of the cantilever crane, affecting the service life of the cantilever crane. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a pulley type cantilever crane, which can automatically detect whether the pulley components need to be lubricated, avoid the occurrence of increased wear of the cantilever crane due to untimely lubrication of the lubricating oil, increase the service life of the cantilever crane, and effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pulley-type cantilever crane, comprising a column, a connecting shell and a self-checking pulley mechanism;

[0005] The column: the upper end thereof is rotatably connected to a rotating drum, the outer arc surface of the rotating drum is provided with a rotating arm, the lower end of the rotating arm is laterally slidably connected to a sliding frame plate, the lower end of the sliding frame plate is rotatably connected to a winding drum through a rotating shaft, the outer arc surface of the winding drum is wound with a steel wire rope, the front end of the steel wire rope is fixedly connected to the winding drum, and the rear end of the steel wire rope is fixedly connected to the sliding frame plate;

[0006] Connecting shell: a hook is installed at the lower end of the shell;

[0007] Self-checking pulley mechanism: It is arranged inside the connecting shell. The steel wire rope is installed in conjunction with the self-checking pulley mechanism to automatically detect whether the pulley components need lubrication, so that the lubricating oil of the cantilever crane pulley components can be added more timely, avoiding the increase of working wear of the cantilever crane due to untimely lubrication, and prolonging the service life of the cantilever crane.

[0008] Furthermore, a single-chip microcomputer is provided on the outer arc surface of the column, and an input end of the single-chip microcomputer is electrically connected to an external power supply to control the start and stop of the entire device.

[0009] Furthermore, the self-inspection pulley mechanism includes a rotating column, a pulley, a ring and a torsion spring. The rotating column is rotatably connected between the left and right inner walls of the connecting shell through a bearing. The middle part of the outer arc surface of the rotating column is rotatably connected to the pulley. Rings are provided on the left and right ends of the outer arc surface of the rotating column. Torsion springs are movably sleeved on the left and right ends of the outer arc surface of the rotating column. One end of the torsion spring close to the lateral center of the rotating column is fixedly connected to the pulley, and the other end of the torsion spring is fixedly connected to the ring respectively. The steel wire rope passes through the lower end of the pulley groove, and the torsion angle of the torsion spring is used to judge the friction force exerted on the rotation of the pulley component.

[0010] Furthermore, the self-checking pulley mechanism also includes an angle sensor 1 and a gear 1. The angle sensor 1 is respectively arranged on the left and right inner walls of the connecting shell. A gear 1 is provided at the end of the detection end of the angle sensor 1. The circular ring is an outer gear ring. The circular ring is meshed and connected with the adjacent gear 1. The output end of the angle sensor 1 is electrically connected to the input end of the single-chip microcomputer to detect the rotation angle of the rotating column.

[0011] Furthermore, the self-checking pulley mechanism also includes an outer gear ring, angle sensor 2 and gear 2. The outer gear ring is respectively arranged on the left and right sides of the pulley, and the angle sensor 2 is respectively arranged on the left and right inner walls of the connecting shell. Gear 2 is provided at the end of the detection end of the angle sensor 2. Gear 2 is meshed and connected with the adjacent outer gear ring. The output end of the angle sensor 2 is electrically connected to the input end of the single-chip microcomputer to detect the rotation angle of the pulley.

[0012] Furthermore, a reduction motor is provided at the upper end of the column, the upper end of the output shaft of the reduction motor is fixedly connected to the rotating drum, and a screw motor is installed at the lower end of the rotating arm. The screw of the screw motor is threadedly connected to the screw hole in the middle of the sliding frame plate, and the input ends of the reduction motor and the screw motor are electrically connected to the output end of the single-chip microcomputer to provide power for adjusting the horizontal position of the object.

[0013] Furthermore, a winding motor is provided at the lower end of the sliding frame plate, the output shaft of the winding motor is fixedly connected to the rotating shaft of the winding drum, and the input end of the winding motor is electrically connected to the output end of the single-chip microcomputer to provide power for the rotation of the winding drum.

[0014] Compared with the prior art, the beneficial effects of the utility model are: the pulley cantilever crane has the following advantages:

[0015] When in use, the winding motor is started by the single-chip microcomputer to wind up the wire rope, pull the pulley and the object to move upward, and the movable pulley principle is used to reduce the force required for moving the object. At the same time, under the action of the friction force between the pulley and the wire rope, the torsion of the torsion spring is overcome, so that the wire rope and the pulley rotate relatively, and under the action of the torsion of the torsion spring, the rotating column is driven to rotate together, and the angle of rotation of the rotating column is detected by angle sensor one, and the angle of rotation of the pulley is detected by angle sensor two. By calculating the difference in the rotation angle of the pulley and the rotating column, the torsion angle of the torsion spring is judged, and then the force required for the rotation of the rotating column is determined. When the required force exceeds the specified value, it indicates that the pulley component needs to be lubricated. The pulley component is automatically detected to see whether it needs to be lubricated, so that the lubricating oil of the cantilever crane pulley component can be added more timely, and the increase in the working wear of the cantilever crane due to untimely lubrication can be avoided, thereby improving the service life of the cantilever crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the front view cross section of the overall device of the utility model;

[0018] Figure 3 It is a schematic structural diagram of a side cross-section of the overall device of the utility model;

[0019] Figure 4 This is an enlarged structural diagram of point A of the utility model.

[0020] In the figure: 1 column, 2 rotating drum, 3 rotating arm, 4 sliding frame plate, 5 winding drum, 6 wire rope, 7 connecting shell, 8 hook, 9 self-checking pulley mechanism, 91 rotating column, 92 pulley, 93 ring, 94 torsion spring, 95 angle sensor 1, 96 gear 1, 97 outer gear ring, 98 angle sensor 2, 99 gear 2, 10 single chip microcomputer, 11 reduction motor, 12 screw motor, 13 winding motor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 ,This embodiment provides a technical solution: a pulley-type cantilever crane, comprising a column 1, a connecting shell 7 and a self-checking pulley mechanism 9;

[0023] Column 1: The upper end thereof is rotatably connected with a rotating drum 2, and a rotating arm 3 is provided on the outer arc surface of the rotating drum 2. The lower end of the rotating arm 3 is slidably connected with a sliding frame plate 4 in a transverse direction. The lower end of the sliding frame plate 4 is rotatably connected with a winding drum 5 through a rotating shaft. A steel wire rope 6 is wound around the outer arc surface of the winding drum 5. The front end of the steel wire rope 6 is fixedly connected to the winding drum 5, and the rear end of the steel wire rope 6 is fixedly connected to the sliding frame plate 4. The steel wire rope 6 is wound by the rotation of the winding drum 5 to pull the object connected to the steel wire rope 6 upward. The horizontal position of the object is adjusted by the relative sliding of the sliding frame plate 4 and the rotating arm 3, and the relative rotation of the rotating drum 2 and the column 1. A single-chip microcomputer 10 is provided on the outer arc surface of the column 1. The input end of the single-chip microcomputer 10 is electrically connected to an external power supply. The control To control the start and stop of the whole device, a reduction motor 11 is provided at the upper end of the column 1, and the upper end of the output shaft of the reduction motor 11 is fixedly connected to the rotating drum 2, so as to provide power for the relative rotation of the rotating drum 2 and the column 1. A screw motor 12 is installed at the lower end of the rotating arm 3, and the screw of the screw motor 12 is threadedly connected to the screw hole in the middle of the sliding frame plate 4. The input ends of the reduction motor 11 and the screw motor 12 are both electrically connected to the output end of the single-chip microcomputer 10, so as to provide power for the relative sliding of the sliding frame plate 4 and the rotating arm 3. A winding motor 13 is provided at the lower end of the sliding frame plate 4, and the output shaft of the winding motor 13 is fixedly connected to the rotating shaft of the winding drum 5. The input end of the winding motor 13 is electrically connected to the output end of the single-chip microcomputer 10, so as to provide power for the rotation of the winding drum 5.

[0024] Connecting shell 7: A hook 8 is installed at the lower end thereof, and the hook 8 is rotatably connected to the connecting shell 7 through a pin shaft, so as to facilitate the connection between the wire rope 6 and the object;

[0025] Self-check pulley mechanism 9: arranged inside the connecting shell 7, the steel wire rope 6 is installed in cooperation with the self-check pulley mechanism 9, the self-check pulley mechanism 9 comprises a rotating column 91, a pulley 92, a circular ring 93 and a torsion spring 94, the rotating column 91 is rotatably connected between the left and right inner walls of the connecting shell 7 through a bearing, the middle of the outer arc surface of the rotating column 91 is rotatably connected with the pulley 92, the left and right ends of the outer arc surface of the rotating column 91 are provided with circular rings 93, the left and right ends of the outer arc surface of the rotating column 91 are movably sleeved with torsion springs 94, the end of the torsion spring 94 close to the horizontal center of the rotating column 91 is fixedly connected to the pulley 92, and the torsion spring 94 is The other end is fixedly connected to the ring 93, and the wire rope 6 passes through the lower end of the groove of the pulley 92. During the winding process of the wire rope 6, because the rear end of the wire rope 6 is fixedly connected to the sliding frame plate 4, as the length of the wire rope 6 decreases, the pulley 92 and the object are pulled upward. The movable pulley principle is used to reduce the force required to move the object. At the same time, under the action of the friction between the pulley 92 and the wire rope 6, the torsion of the torsion spring 94 is overcome, so that the wire rope 6 and the pulley 92 rotate relative to each other. When the torsion of the torsion spring 94 is greater than the friction between the rotating column 91 and the connecting shell 7, the torsion spring 94 is used to rotate relative to the pulley 92. Under the action of the torque of 94, the rotating column 91 is driven to rotate together. The self-checking pulley mechanism 9 also includes an angle sensor 95 and a gear 96. The angle sensor 95 is respectively arranged on the left and right inner walls of the connecting shell 7. The detection end of the angle sensor 95 is provided with a gear 96. The circular rings 93 are all outer gear rings. The circular rings 93 are meshed and connected with the adjacent gear 96. The output end of the angle sensor 95 is electrically connected to the input end of the single-chip computer 10. Through the meshing connection between the circular ring 93 and the gear 96, the angle sensor 95 is used to detect the rotation angle of the rotating column 91. The self-checking pulley mechanism 9 also includes an outer gear ring 97, an angle sensor 98 and a gear 99. The outer gear ring 97 is respectively arranged on the left and right sides of the pulley 92, and the angle sensor 98 is respectively arranged on the left and right inner walls of the connecting shell 7. The detection end of the angle sensor 98 is provided with a gear 99. The gear 99 is meshedly connected with the adjacent outer gear ring 97. The output end of the angle sensor 98 is electrically connected to the input end of the single-chip computer 10. Through the meshing connection between the gear 99 and the outer gear ring 97, the angle sensor 98 is used to detect the rotation angle of the pulley 92.

[0026] The working principle of a pulley cantilever crane provided by the utility model is as follows: when in use, the object is connected to the hook 8, and the winding motor 13 is started by the single-chip microcomputer 10. The output shaft of the winding motor 13 drives the winding drum 5 to rotate, and the wire rope 6 is wound on the outer arc surface of the winding drum 5. Because the rear end of the wire rope 6 is fixedly connected to the sliding frame plate 4, as the length of the wire rope 6 decreases, the pulley 92 and the object are pulled upward, and the movable pulley principle is utilized to reduce the force required for moving the object. At the same time, under the action of the friction force between the pulley 92 and the wire rope 6, the torsion of the torsion spring 94 is overcome, so that the wire rope 6 and the pulley 92 rotate relative to each other. When the torsion force of the torsion spring 94 is greater than the friction force between the rotating column 91 and the connecting shell 7, under the action of the torsion of the torsion spring 94, the rotating column 91 is driven to rotate together, and the meshing connection between the ring 93 and the gear 1 96 is achieved. Next, the angle of rotation of the rotating column 91 is detected by using the angle sensor 1 95, and the angle of rotation of the pulley 92 is detected by using the meshing connection of the gear 2 99 and the outer gear ring 97. The difference in the rotation angle of the pulley 92 and the rotating column 91 is calculated to determine the twisting angle of the torsion spring 94, and then the force required for the rotation of the rotating column 91 is determined. When the required force exceeds the specified value, it indicates that lubricating oil needs to be added to the pulley component, so that the lubricating oil can be added more timely and the wear of the cantilever crane can be reduced. Then the reduction motor 11 is started, and the output shaft of the reduction motor 11 drives the rotating drum 2 and the rotating arm 3 to rotate, so that the object rotates around the column 1, and the screw motor 12 is started. Through the threaded connection between the screw and the sliding frame plate 4, the sliding frame plate 4 is driven to move left and right, and the horizontal position of the object is moved.

[0027] It is worth noting that the single-chip microcomputer 10 disclosed in the above embodiment can use a PIC16F1823-I / P model single-chip microcomputer, and the angle sensor 95, the angle sensor 98, the reduction motor 11, the screw motor 12 and the winding motor 13 can be freely configured according to the actual application scenario. The angle sensor 95 and the angle sensor 98 can both use the HW225D model angle sensor, the reduction motor 11 and the winding motor 13 can both use the 42BYHJ01 model stepping reduction motor, and the screw motor 12 can use the 28E245-6.35-115 model screw motor. The single-chip microcomputer 10 controls the angle sensor 95, the angle sensor 98, the reduction motor 11, the screw motor 12 and the winding motor 13 using methods commonly used in the prior art.

[0028] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pulley cantilever crane, characterized in that: It comprises a column (1), a connecting shell (7) and a self-checking pulley mechanism (9); The column (1) has a rotating drum (2) at its upper end which is rotatably connected, a rotating arm (3) is provided on the outer arc surface of the rotating drum (2), the lower end of the rotating arm (3) is laterally slidably connected to a sliding frame plate (4), the lower end of the sliding frame plate (4) is rotatably connected to a winding drum (5) via a rotating shaft, a steel wire rope (6) is wound around the outer arc surface of the winding drum (5), the front end of the steel wire rope (6) is fixedly connected to the winding drum (5), and the rear end of the steel wire rope (6) is fixedly connected to the sliding frame plate (4); Connecting shell (7): a hook (8) is installed at the lower end of the interior thereof; The self-checking pulley mechanism (9) is arranged inside the connecting shell (7), and the steel wire rope (6) is installed in coordination with the self-checking pulley mechanism (9).

2. A pulley type cantilever crane according to claim 1, characterized in that: A single-chip microcomputer (10) is provided on the outer arc surface of the column (1), and an input end of the single-chip microcomputer (10) is electrically connected to an external power supply.

3. A pulley type cantilever crane according to claim 2, characterized in that: The self-checking pulley mechanism (9) comprises a rotating column (91), a pulley (92), a circular ring (93) and a torsion spring (94). The rotating column (91) is rotatably connected between the left and right inner walls of the connecting shell (7) through a bearing. The middle part of the outer arc surface of the rotating column (91) is rotatably connected with the pulley (92). The left and right ends of the outer arc surface of the rotating column (91) are provided with circular rings (93). The left and right ends of the outer arc surface of the rotating column (91) are movably sleeved with torsion springs (94). One end of the torsion spring (94) close to the transverse center of the rotating column (91) is fixedly connected to the pulley (92), and the other end of the torsion spring (94) is fixedly connected to the circular ring (93). The steel wire rope (6) passes through the lower end of the groove of the pulley (92).

4. The pulley type cantilever crane according to claim 3, characterized in that: The self-checking pulley mechanism (9) further comprises an angle sensor (95) and a gear (96). The angle sensor (95) is respectively arranged on the left and right inner walls of the connecting shell (7). The detection end of the angle sensor (95) is provided with a gear (96). The circular ring (93) is an outer toothed ring. The circular ring (93) is meshedly connected with the adjacent gear (96). The output end of the angle sensor (95) is electrically connected to the input end of the single chip computer (10).

5. The pulley type cantilever crane according to claim 3, characterized in that: The self-checking pulley mechanism (9) further comprises an outer toothed ring (97), an angle sensor (98) and a gear (99), wherein the outer toothed ring (97) is respectively arranged on the left and right sides of the pulley (92), the angle sensor (98) is respectively arranged on the left and right inner walls of the connecting shell (7), the detection end of the angle sensor (98) is provided with a gear (99), the gear (99) is meshedly connected with the adjacent outer toothed ring (97), and the output end of the angle sensor (98) is electrically connected to the input end of the single chip computer (10).

6. The pulley type cantilever crane according to claim 2, characterized in that: A reduction motor (11) is provided at the upper end of the column (1), the upper end of the output shaft of the reduction motor (11) is fixedly connected to the rotating drum (2), a screw motor (12) is installed at the lower end of the rotating arm (3), the screw of the screw motor (12) is threadedly connected to the screw hole in the middle of the sliding frame plate (4), and the input ends of the reduction motor (11) and the screw motor (12) are both electrically connected to the output end of the single chip computer (10).

7. The pulley cantilever crane according to claim 2, characterized in that: A winding motor (13) is provided at the lower end of the sliding frame plate (4), the output shaft of the winding motor (13) is fixedly connected to the rotating shaft of the winding drum (5), and the input end of the winding motor (13) is electrically connected to the output end of the single chip microcomputer (10).

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