Crane with overload protection function

Abstract

The utility model discloses a crane with an overload protection function, and belongs to the technical field of cranes. The device comprises a main beam, a stay cable, a lifting assembly and a magnetic brake, a walking mechanism is installed on a stand column, an overload sensor is installed on one side of the walking mechanism, an audible and visual alarm is arranged at one end of the walking mechanism, an infrared sensor is installed at the other end of the walking mechanism, and the lifting assembly is installed at the bottom end of the walking mechanism and comprises a hoist crane. A driver is installed at one end of the hoist crane. The overload sensor, the audible and visual alarm, the infrared sensor and the magnetic brake are matched, the overload sensor monitors the load condition of the crane in real time, when the load exceeds a rated value, the audible and visual alarm gives an alarm to remind an operator to pay attention, the magnetic brake is started, the crane is prevented from continuing overload operation, and the safety of the crane and goods is protected; the distance between the crane hook and an obstacle is detected through the infrared sensor, an operator is reminded to pay attention, and collision accidents are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane technical field, concretely is a crane with overload protection function. BACKGROUND

[0002] The crane is a mechanical equipment for hoisting and carrying heavy objects, and is widely used in the fields of construction, industry, port and the like, and the wall crane is a light type hoisting equipment, and hoisting work is completed through a hook, a steel wire rope and a drum, a driver and the like, in the use process of the crane, overload is a common problem, and if protection is not taken, the crane will be damaged and even a safety accident will occur.

[0003] The existing wall crane has a rated load capacity, and when the hoisted heavy object exceeds the rated value, overload will occur, which will cause the structure of the crane to be damaged, the steel wire rope to be broken and other serious accidents, and the life safety of the operator and surrounding personnel is endangered. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a crane with overload protection function, through cooperation of overload sensor, audible and visual alarm, infrared sensor and magnetic brake, the overload sensor monitors the load condition of the crane in real time, when the load exceeds the rated value, the audible and visual alarm will give an alarm to remind the operator, and the magnetic brake is started to prevent the crane from continuing to overload operation.

[0005] The utility model is realized through the following technical schemes:

[0006] The utility model is a crane with overload protection function, including main beam and cable-stayed rope, the main beam is welded on one side of the stand, one end of the cable-stayed rope is connected to one side of the main beam, the other end of the cable-stayed rope is connected to one side of the top surface of the stand, a travelling mechanism is installed on the stand, an overload sensor is installed on one side of the travelling mechanism, an audible and visual alarm is arranged on one end of the travelling mechanism, and an infrared sensor is installed on the other end of the travelling mechanism.

[0007] It also includes a hoisting assembly and a magnetic brake, the hoisting assembly is installed at the bottom end of the travelling mechanism, the hoisting assembly includes a hoisting cage, a driver is installed at one end of the hoisting cage, a drum is installed at the other end of the hoisting cage, a steel wire rope is wound on the drum, a hook is installed at the bottom end of the steel wire rope, and the magnetic brake is installed on the driving shaft of the driver.

[0008] Further, the main beam is vertically arranged on one side of the stand, the main beam is in the shape of an I-beam, the travelling mechanism includes guide wheels, a driving device and a supporting mechanism, and the travelling mechanism moves on the main beam through the guide wheels.

[0009] Further, the sound-light alarm and the infrared sensor are respectively arranged at two sides of the bottom end of the walking mechanism, the overload sensor is arranged between the sound-light alarm and the infrared sensor, and the sound-light alarm and the infrared sensor are arranged above the winding drum.

[0010] Further, the hoisting pulley is rotationally connected to the winding drum through a shaft, a winding drum groove in a ring shape is formed in the outer wall of the winding drum, the steel wire rope is wound in the winding drum groove, and the hook is arranged at the bottom end of the steel wire rope.

[0011] Further, the magnetic brake is arranged at one side of the hoisting pulley, and the magnetic brake is arranged between the hoisting pulley and the driver.

[0012] The utility model has the following beneficial effects:

[0013] The utility model discloses the cooperation of overload sensor, sound-light alarm, infrared sensor and magnetic brake, and the overload sensor monitors the load condition of the crane in real time, when the load exceeds the rated value, the sound-light alarm will issue an alarm, reminds the operator to pay attention, and the magnetic brake starts simultaneously, prevents the crane from continuing to overload operation, thereby protects the safety of the crane and goods, and the infrared sensor can detect the distance between the crane hook and the obstacle, when the hook approaches the obstacle, the sound-light alarm will issue an alarm, reminds the operator to pay attention, avoids the occurrence of the collision accident, and improves the operation safety of the crane.

[0014] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS

[0015] Figure 1 It is a structural schematic view of the crane;

[0016] Figure 2 It is a structural schematic view of the walking mechanism, the lifting assembly, the magnetic brake, the overload sensor, the sound-light alarm and the infrared sensor;

[0017] Figure 3 It is a structural schematic view of the main beam, the walking mechanism, the lifting assembly, the magnetic brake and the infrared sensor;

[0018] Figure 4 It is a top view structural schematic view of the crane.

[0019] In the drawing: 1, stand; 2, main beam; 3, inclined cable; 4, walking mechanism; 5, lifting assembly; 501, hoisting pulley; 502, driver; 503, winding drum; 504, steel wire rope; 505, hook; 6, magnetic brake; 7, overload sensor; 8, sound-light alarm; 9, infrared sensor. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all the other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope of protection of the present utility model.

[0021] Please refer to Figures 1-4 The present utility model provides a technical scheme: a crane with overload protection function, including main beam 2 and cable-stayed cable 3, one side of stand column 1 is welded with main beam 2, one end of cable-stayed cable 3 is connected to one side of main beam 2, the other end of cable-stayed cable 3 is connected to one side of the top surface of stand column 1, walking mechanism 4 is installed on stand column 1, main beam 2 is vertically arranged on one side of stand column 1, main beam 2 is in the shape of I-beam, walking mechanism 4 includes guide wheel, driving device and support mechanism, walking mechanism 4 moves on main beam 2 through guide wheel, overload sensor 7 is installed on one side of walking mechanism 4, sound and light alarm 8 is arranged on one end of walking mechanism 4, infrared sensor 9 is installed on the other end of walking mechanism 4, sound and light alarm 8 and infrared sensor 9 are respectively located on both sides of the bottom end of walking mechanism 4, overload sensor 7 is located between sound and light alarm 8 and infrared sensor 9, sound and light alarm 8 and infrared sensor 9 are located above reel 503,

[0022] Overload sensor 7 is composed of elastic element, single-chip microcomputer and capacitance sensor, when the force received by the object exceeds its carrying capacity, the elastic element will deform, thereby causing the change of the output signal of the capacitance sensor, the deformation of the elastic element is detected and converted into an electric signal, the electric signal is captured by the single-chip microcomputer, the single-chip microcomputer triggers the alarm and controls the magnetic brake 6 to stop the machine running, so as to prevent the object from being damaged or dangerous, the load condition of the crane is monitored in real time through overload sensor 7, when the weight hoisted by the crane exceeds the rated weight, a signal will be sent, triggering sound and light alarm 8 to issue an alarm, sound and light alarm 8 can emit sound and flash, reminding the operator to pay attention to the overload condition, when the hook 505 of the crane approaches the obstacle, infrared sensor 9 will send a signal, triggering sound and light alarm 8 to issue an alarm, reminding the operator to pay attention, thereby improving the safety and reliability of the crane and reducing the occurrence of accidents;

[0023] The lifting assembly 5 is installed at the bottom end of the walking mechanism 4, and the lifting assembly 5 comprises a hoist 501, the hoist 501 is provided with a driver 502 at one end, the driver 502 provides power to rotate a drum 503 to wind or release a steel wire rope 504, the hoist 501 is provided with the drum 503 at the other end, the drum 503 is provided with the steel wire rope 504 wound thereon, the hoist 501 is rotatably connected to the drum 503 through a shaft, the drum 503 is provided with a drum groove in a surrounding shape on the outer wall, the steel wire rope 504 is wound in the drum groove, the hoist 501 is provided with a hook 505 at the bottom end of the steel wire rope 504, the drum 503 winds or releases the steel wire rope 504 through rotation, the steel wire rope 504 is wound or released through the drum 503, so that the hook 505 is lifted or lowered, the hook 505 is provided with an opening and a locking device to ensure safe hoisting of goods, in the working process, the driver 502 provides power to rotate the drum 503, the rotation of the drum 503 drives the steel wire rope 504 to be wound or released, so that the hook 505 is lifted or lowered, the magnetic brake 6 is installed on the driving shaft of the driver 502, the magnetic brake 6 is abutted on one side of the hoist 501, and the magnetic brake 6 is located between the hoist 501 and the driver 502; in the normal case, the magnetic brake 6 is in the braking state, when the driver 502 stops working, the magnetic brake 6 tightly adsorbs the brake disc or brake piece on the driving shaft through magnetic force, so as to prevent the rotation of the driving shaft, when the hoist 501 needs to be operated, the driver 502 starts to work and provides power, at the same time, the magnetic brake 6 receives a control signal, changes the size or direction of the magnetic force, releases the adsorption of the brake disc or brake piece, and enables the driving shaft to rotate freely, when overload, failure or emergency occurs, the magnetic brake 6 can quickly apply the maximum braking force to immediately stop the movement of the hoist 501, so as to protect the safety of personnel and equipment.

[0024] The preferred embodiments disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. Crane with overload protection, comprising a mast (1), a main beam (2) and a stay (3), characterized in that: The column (1) one side is welded with main girder (2), the cable (3) one end is connected in main girder (2) one side, the cable (3) other end is connected in column (1) top one side, the column (1) is installed with walking mechanism (4), walking mechanism (4) one side is installed with overload sensor (7), walking mechanism (4) one end is provided with sound light alarm (8), walking mechanism (4) other end is installed with infrared sensor (9); It also includes lifting assembly (5) and magnetic brake (6), the lifting assembly (5) is installed in walking mechanism (4) bottom, the lifting assembly (5) includes hoist (501), the hoist (501) one end is installed with driver (502), the hoist (501) other end is installed with drum (503), the drum (503) is wound with wire rope (504), the wire rope (504) bottom end is installed with lifting hook (505), the magnetic brake (6) is installed on the drive shaft of driver (502).

2. A crane with overload protection according to claim 1, characterized in that The main girder (2) is vertically arranged on one side of the column (1), the main girder (2) is in the shape of an I-beam, the walking mechanism (4) includes guide wheels, a driving device and a support mechanism, the walking mechanism (4) moves on the main girder (2) through the guide wheels.

3. The crane with overload protection function according to claim 1, characterized in that, The sound light alarm (8) and infrared sensor (9) are respectively located on both sides of the bottom end of the walking mechanism (4), the overload sensor (7) is located between the sound light alarm (8) and the infrared sensor (9), and the sound light alarm (8) and the infrared sensor (9) are located above the drum (503).

4. The crane with overload protection function according to claim 1, characterized in that, The hoist (501) is rotatably connected to the drum (503) through a shaft, the drum (503) has a circumferential drum groove formed in the outer wall thereof, the wire rope (504) is wound in the drum groove, and the lifting hook (505) is located at the bottom end of the wire rope (504).

5. Crane with overload protection according to claim 4, characterized in that The magnetic brake (6) is arranged on one side of the hoist (501) and located between the hoist (501) and the driver (502).

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