Lifting appliance with safety protection device

Abstract

The invention relates to the field of lifting appliances, in particular to a lifting appliance with a safety protection device, which comprises a lifting beam, an alarm lamp is mounted in the center of the front of the lifting beam, displays are mounted at the left and right ends of the front of the lifting beam, a cross beam is welded at the bottom of the lifting beam, an insertion hole is formed in the outer wall of the cross beam, and supporting seats are mounted on the left and right sides of the cross beam. A grabbing mechanism is installed at the bottom of the supporting base, and the displayer displays the weight borne by the grabbing mechanism when the grabbing mechanism grabs a heavy object. The grabbing mechanism comprises a rotating assembly installed at the bottom of the supporting base, a weighing assembly and a limiting assembly are arranged at the bottom of the rotating assembly, one end of a chain is installed at the bottom of the limiting assembly, a lifting hook is installed at the other end of the chain, and a positioning assembly is installed on the outer wall of the lifting hook. The chain has double insurance, potential safety hazards caused by the fact that the bearing capacity of the chain exceeds the limit are prevented, the transferring process is stable, stretching or storage of the binding belt is achieved, hoisting of various heavy objects can be achieved, and the use universality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting tools, and specifically, to a lifting tool with a safety protection device. Background Art

[0002] A lifting tool refers to a device for lifting heavy objects in a hoisting machine. Commonly used lifting tools include special riggings such as hooks, wire ropes, and chains. Lifting suction cups, tongs, and forklift forks can be used as special lifting tools on a crane for a long time, or can be used as replaceable auxiliary lifting tools hanging on the hook temporarily. They are often used in multi-cargo type warehouses and yards to improve the operation efficiency.

[0003] The shape of the heavy object is an uncertain factor. When hanging the hook on the heavy object for lifting, if the chain inclines more than 60 degrees, the bearing capacity of the chain exceeds the limit, there are potential safety hazards. For heavy objects with a smooth surface or without a lifting ring, it is impossible to complete the lifting, and the lifting method is single, making it difficult to adapt to the transfer of various types of heavy objects. Summary of the Invention

[0004] The purpose of the embodiments of the present invention is to provide a lifting tool with a safety protection device to solve the problems proposed in the above background art that the bearing capacity of the chain cannot be estimated, there are potential safety hazards during lifting, and it is difficult to adapt to the transfer of various types of heavy objects.

[0005] To achieve the above purpose, the embodiments of the present invention provide the following technical solution: A lifting tool with a safety protection device includes a lifting beam. An alarm lamp is installed at the center position on the front surface of the lifting beam, and monitors are installed at both the left and right ends on the front surface of the lifting beam. A cross beam is welded to the bottom of the lifting beam, and jacks are provided on the outer wall of the cross beam. Support seats are installed on both the left and right sides of the cross beam, and a grasping mechanism is installed at the bottom of the support seats. The monitor displays the weight borne by the grasping mechanism when grasping the heavy object.

[0006] Preferably, the grasping mechanism includes a rotating assembly installed at the bottom of the support seat. A weight weighing assembly and a limiting assembly are provided at the bottom of the rotating assembly. One end of a chain is installed at the bottom of the limiting assembly, and the other end of the chain is installed with a hook. A positioning assembly is installed on the outer wall of the hook.

[0007] Preferably, the rotating assembly includes a mounting seat installed at the bottom of the support seat. A travel switch electrically connected to the alarm lamp is installed at the top of the inner cavity of the mounting seat. A first rotating shaft capable of rotating around its own axis is installed in the middle of the inner cavity of the mounting seat through a bearing. A turntable is installed at the center position on the outer wall of the first rotating shaft. A slideway is provided on the side wall of the turntable. An ear plate is installed on the outer wall of the first rotating shaft, and the turntable and the ear plate rotate synchronously through the first rotating shaft; the travel switch monitors the rotation angle of the turntable, thereby preventing the inclination angle of the chain from exceeding the limit when lifting the heavy object, and avoiding potential safety hazards caused by the chain being overloaded.

[0008] Preferably, the length of the slideway is one-third of the perimeter of the side wall of the turntable, and both sides of the slideway are inclined planes.

[0009] Preferably, the weight weighing assembly includes a hydraulic tank installed at the center position inside the ear plate. The inner cavity of the hydraulic tank is filled with hydraulic oil. A piston that can slide up and down is inserted into the top of the inner cavity of the hydraulic tank. A hydraulic weighing sensor electrically connected to the display is installed on the side wall of the hydraulic tank. The hydraulic weighing sensor measures the weight by detecting the change in the pressure of the hydraulic oil; the limiting assembly squeezes the piston, the pressure of the hydraulic oil increases, and the weight of the heavy object borne by the chain is detected through the hydraulic weighing sensor to prevent the chain from being overloaded.

[0010] Preferably, the limiting assembly includes sliding sleeves installed at the front and rear ends of the bottom of the ear plate. A sliding rod that can slide up and down is inserted into the inner cavity of the sliding sleeve. A pressing plate in contact with the piston is installed at the top of the sliding rod. The bottom of the sliding rod is connected to the top end of the chain.

[0011] Preferably, the positioning assembly includes a box body installed on the outer wall of the hook. A first gear and a first reel are installed in the left inner cavity of the box body from front to back through a pin shaft. A binding strap is wound around the outer wall of the first reel. One end of the binding strap extends out of the left side wall of the box body and is installed with a hanging ring. The hanging ring can be sleeved on the hook. A traction part is installed on the right side of the inner cavity of the box body.

[0012] Preferably, the traction part includes a mounting plate installed on the right side of the inner cavity of the box body. Two symmetrically arranged guide rods are installed on the right side of the inner cavity of the box body, and the guide rods are located in front of the mounting plate. A sliding seat that can slide up and down is sleeved on the outer wall of the guide rod. A fixed pulley is installed on the front surface of the sliding seat. A second rotating shaft that can rotate around its own axis is installed on the front surface of the mounting plate through a bearing. A second gear is installed on the outer wall of the second rotating shaft. A torsion spring is sleeved on the outer wall of the second rotating shaft, and both ends of the torsion spring are clamped with the outer wall of the second rotating shaft and the second gear respectively. Under the action of the torsion force of the torsion spring, the second gear is driven to rotate counterclockwise. A rack meshed with the second gear is installed on the outer wall of the sliding seat. A second reel and a third gear are installed in the front left of the mounting plate from front to back through a pin shaft, and the third gear is meshed with the first gear. A traction rope is lapped on the outer wall of the fixed pulley. One end of the traction rope is wound around the outer wall of the second reel, and the other end of the traction rope is connected to the right inner wall of the box body.

[0013] Preferably, the two racks are respectively located on the left and right sides of the second gear.

[0014] Preferably, the number of teeth of the third gear is more than three times that of the first gear.

[0015] Preferably, the second gear cooperates with the rack to make the two fixed pulleys move in opposite directions, increasing the traction length of the traction rope. The second reel plays a role in winding and releasing the traction rope, thereby realizing the transmission between the first gear and the third gear, and enabling the first reel to release and wind the binding strap.

[0016] Compared with the prior art, the beneficial effects of the embodiments of the present invention are as follows: 1. When the chain bears the gravity of the heavy object, the chain traction ear plate rotates, and then the turntable rotates. When the slideway presses the travel switch, the alarm light is powered on and emits light, indicating that the inclination angle of the chain exceeds the limit. The chain traction slide rod presses the piston down with the pressing plate, increasing the pressure of the hydraulic oil. The hydraulic weighing sensor measures the weight borne by the chain. Therefore, the chain has a double insurance mechanism to prevent potential safety hazards caused by the chain's bearing capacity exceeding the limit, ensuring a stable transfer process.

[0017] 2. Under the transmission condition of the second gear and the rack, the two sliding seats can slide in opposite directions. When dragging the binding strap, the first reel releases the binding strap. During storage, the torsion of the torsion spring makes the second gear rotate counterclockwise, and the fixed pulley pulls the traction rope, causing the second reel to release the traction rope. Under the transmission condition of the first gear and the third gear, the first reel winds the binding strap. Therefore, the stretching or storage of the binding strap can be realized, and various types of heavy objects can be lifted, improving the versatility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is Figure 1 a partial structural diagram of Figure 3 is a schematic structural diagram of the grasping mechanism; Figure 4 is Figure 3 a partial structural diagram of Figure 5 is an exploded view of the weight weighing assembly; Figure 6 is a schematic structural diagram of the limiting assembly; Figure 7 is a schematic structural diagram of the positioning assembly; Figure 8 is Figure 7 an enlarged view of part A in

[0019] In the figure: 1. Suspension beam; 2. Alarm lamp; 3. Display; 4. Cross beam; 5. Support seat; 6. Grabbing mechanism; 61. Rotating assembly; 62. Weight weighing assembly; 63. Limiting assembly; 64. Chain; 65. Hook; 66. Positioning assembly; 611. Mounting seat; 612. Travel switch; 613. First rotating shaft; 614. Turntable; 615. Slideway; 616. Ear plate; 621. Hydraulic tank; 622. Hydraulic oil; 623. Piston; 624. Hydraulic weighing sensor; 631. Sliding sleeve; 632. Slide bar; 633. Pressure plate; 661. Box body; 662. First gear; 663. First reel; 664. Binding strap; 665. Hanging ring; 666. Traction part; 6661. Mounting plate; 6662. Guide rod; 6663. Slide block; 6664. Fixed pulley; 6665. Second rotating shaft; 6666. Second gear; 6667. Torsion spring; 6668. Rack; 6669. Second reel; 66610. Third gear; 66611. Traction rope. Detailed implementation manners

[0020] The technical solutions of the present invention will be further described in detail below in conjunction with the specific implementation manners.

[0021] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0022] Please refer to Figures 1-8 As shown, in the embodiment of the present invention, a lifting tool with a safety protection device includes a suspension beam 1. An alarm lamp 2 is installed at the center position on the front surface of the suspension beam 1, and displays 3 are installed at both left and right ends on the front surface of the suspension beam 1. A cross beam 4 is welded to the bottom of the suspension beam 1, and jacks are provided on the outer wall of the cross beam 4. Support seats 5 are installed on both left and right sides of the cross beam 4, and a grabbing mechanism 6 is installed at the bottom of the support seat 5. The display 3 displays the weight borne by the grabbing mechanism 6 when grabbing heavy objects.

[0023] Furthermore, the grabbing mechanism 6 includes a rotating assembly 61 installed at the bottom of the support seat 5. A weight weighing assembly 62 and a limiting assembly 63 are provided at the bottom of the rotating assembly 61. One end of a chain 64 is installed at the bottom of the limiting assembly 63, and the other end of the chain 64 is installed with a hook 65. A positioning assembly 66 is installed on the outer wall of the hook 65.

[0024] Further, the rotating assembly 61 includes a mounting base 611 installed at the bottom of the support base 5. At the top of the inner cavity of the mounting base 611, a travel switch 612 electrically connected to the alarm lamp 2 is installed. In the middle of the inner cavity of the mounting base 611, a first rotating shaft 613 capable of rotating around its own axis is installed through a bearing. At the central position of the outer wall of the first rotating shaft 613, a turntable 614 is installed. On the side wall of the turntable 614, a slideway 615 is provided. The length of the slideway 615 is one-third of the circumference of the side wall of the turntable 614, and both sides of the slideway 615 are inclined planes. When the rotation angle of the turntable 614 exceeds 120 degrees, the slideway 615 will trigger the travel switch 612 to monitor the inclination angle of the chain 64. On the outer wall of the first rotating shaft 613, an ear plate 616 is installed, and the turntable 614 and the ear plate 616 rotate synchronously through the first rotating shaft 613.

[0025] Further, the weight weighing assembly 62 includes a hydraulic tank 621 installed at the central position inside the ear plate 616. The inner cavity of the hydraulic tank 621 is filled with hydraulic oil 622. A piston 623 capable of sliding up and down is inserted into the top of the inner cavity of the hydraulic tank 621. A hydraulic weighing sensor 624 electrically connected to the display 3 is installed on the side wall of the hydraulic tank 621. The hydraulic weighing sensor 624 measures the weight by detecting the pressure change of the hydraulic oil 622.

[0026] Further, the limiting assembly 63 includes sliding sleeves 631 installed at the front and rear ends of the bottom of the ear plate 616. A sliding rod 632 capable of sliding up and down is inserted into the inner cavity of the sliding sleeve 631. At the top of the sliding rod 632, a pressing plate 633 in contact with the piston 623 is installed. The bottom of the sliding rod 632 is connected to the top end of the chain 64.

[0027] Further, the positioning assembly 66 includes a box body 661 installed on the outer wall of the hook 65. Inside the box body 661 on the left side, a first gear 662 and a first reel 663 are installed from front to back through a pin shaft. A binding strap 664 is wound around the outer wall of the first reel 663. One end of the binding strap 664 extends out of the left side wall of the box body 661 and is installed with a hanging ring 665. The hanging ring 665 can be sleeved on the hook 65. A traction part 666 is installed on the right side inside the box body 661.

[0028] Further, the traction part 666 includes a mounting plate 6661 installed on the right side of the inner cavity of the box body 661. Two symmetrically arranged guide rods 6662 are installed on the right side of the inner cavity of the box body 661, and the guide rods 6662 are located in front of the mounting plate 6661. A sliding seat 6663 capable of sliding up and down is sleeved on the outer wall of the guide rod 6662. A fixed pulley 6664 is installed on the front surface of the sliding seat 6663. A second rotating shaft 6665 capable of rotating around its own axis is installed on the front surface of the mounting plate 6661 through a bearing. A second gear 6666 is installed on the outer wall of the second rotating shaft 6665. A torsion spring 6667 is sleeved on the outer wall of the second rotating shaft 6665. Both ends of the torsion spring 6667 are clamped with the outer wall of the second rotating shaft 6665 and the second gear 6666 respectively. Under the action of the torsion of the torsion spring 6667, the second gear 6666 is driven to rotate counterclockwise. A rack 6668 meshed with the second gear 6666 is installed on the outer wall of the sliding seat 6663. A second reel 6669 and a third gear 66610 are installed on the front left side of the mounting plate 6661 from front to back through a pin shaft, and the third gear 66610 is meshed with the first gear 662. A traction rope 66611 is lapped on the outer wall of the fixed pulley 6664. One end of the traction rope 66611 is wound around the outer wall of the second reel 6669, and the other end of the traction rope 66611 is connected to the right inner wall of the box body 661.

[0029] Further, the two racks 6668 are respectively located on the left and right sides of the second gear 6666. Under the transmission condition of the rack 6668 and the second gear 6666, the two sliding seats 6663 can move in opposite directions, improving the traction distance of the traction rope 66611.

[0030] Further, the number of teeth of the third gear 66610 is more than three times that of the first gear 662, increasing the angular velocity of the first gear 662 and further increasing the winding length of the strap 664.

[0031] Working principle Step 1: The hook 65 is hung on the heavy object. When using a crane or hoist to lift the lifting beam 1, the chain 64 is straightened. At the same time, the chain 64 pulls the ear plate 616 to rotate, and the turntable 614 rotates clockwise or counterclockwise to transfer the heavy object. Step 2: Once the end of the slideway 615 presses the travel switch 612, the travel switch 612 is triggered and powers on the alarm lamp 2, and the alarm lamp 2 emits light to give an alarm, indicating that the inclination angle of the chain 64 exceeds the safe use angle of the chain 64. The pulling force of the chain 64 pulls down the sliding rod 632, causing the pressing plate 633 to press down the piston 623. The piston 623 squeezes the hydraulic oil 622. The hydraulic weighing sensor 624 calculates the gravity of the heavy object borne by the chain 64 according to the oil pressure change of the hydraulic oil 622 and displays it on the display 3, realizing the detection during the use of the chain 64. Step 3: When it is necessary to transfer heavy objects that are not convenient to lift, pull the hanging ring 665 to cause the strap 664 to extend. At this time, the first reel 663 and the first gear 662 rotate clockwise, and the second reel 6669 winds up the towing rope 66611. The towing rope 66611 pulls the two first fixed pulleys 6664 to move inward, winds the strap 664 around the outside of the heavy object, and then puts the hanging ring 665 on the hook 65. Then, the strap 664 can be used to lift the heavy object to achieve the transfer of irregularly shaped or columnar heavy objects; When the hanging ring 665 is removed from the hook 65, the torsion spring 6667 drives the second gear 6666 to rotate counterclockwise. Under the transmission condition of the second gear 6666 and the rack 6668, the two fixed pulleys 6664 move outward simultaneously, pulling the second reel 6669 to release the towing rope 66611. The second reel 6669 rotates clockwise. Under the transmission condition of the first gear 662 and the third gear 66610, the first reel 663 rotates counterclockwise to wind up the strap 664, realizing the storage of the strap 664.

[0032] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A sling with a safety protection device, including a suspension beam (1), characterized in that, An alarm lamp (2) is installed at the center position on the front side of the hanging beam (1). Displays (3) are installed at both the left and right ends on the front side of the hanging beam (1). A cross beam (4) is welded to the bottom of the hanging beam (1), and jacks are provided on the outer wall of the cross beam (4). Support seats (5) are installed on both the left and right sides of the cross beam (4), and a grasping mechanism (6) is installed at the bottom of the support seats (5). The display (3) shows the weight borne by the grasping mechanism (6) when grasping a heavy object. The grasping mechanism (6) includes a rotating assembly (61) installed at the bottom of the support seat (5). A weight measuring assembly (62) and a limiting assembly (63) are provided at the bottom of the rotating assembly (61). One end of a chain (64) is installed at the bottom of the limiting assembly (63), and the other end of the chain (64) is installed with a hook (65). A positioning assembly (66) is installed on the outer wall of the hook (65).

2. The spreader with a safety protection device according to claim 1, characterized in that, The rotating assembly (61) includes a mounting seat (611) installed at the bottom of the support seat (5). A travel switch (612) electrically connected to the alarm lamp (2) is installed at the top of the inner cavity of the mounting seat (611). A first rotating shaft (613) capable of rotating around its own axis is installed in the middle of the inner cavity of the mounting seat (611) through a bearing. A turntable (614) is installed at the center position on the outer wall of the first rotating shaft (613). A slideway (615) is provided on the side wall of the turntable (614). An ear plate (616) is installed on the outer wall of the first rotating shaft (613). The turntable (614) and the ear plate (616) rotate synchronously through the first rotating shaft (613).

3. The spreader with a safety protection device according to claim 2, characterized in that, The length of the slideway (615) is one-third of the perimeter of the side wall of the turntable (614), and both sides of the slideway (615) are inclined planes.

4. The spreader with a safety protection device according to claim 3, characterized in that, The weight measuring assembly (62) includes a hydraulic tank (621) installed at the center position on the inner side of the ear plate (616). Hydraulic oil (622) is filled in the inner cavity of the hydraulic tank (621). A piston (623) capable of sliding up and down is inserted into the top of the inner cavity of the hydraulic tank (621). A hydraulic weighing sensor (624) electrically connected to the display (3) is installed on the side wall of the hydraulic tank (621). The hydraulic weighing sensor (624) measures the weight by detecting the pressure change of the hydraulic oil (622).

5. The spreader with a safety protection device according to claim 4, characterized in that, The limiting assembly (63) includes sliding sleeves (631) installed at the front and rear ends of the bottom of the ear plate (616). A sliding rod (632) capable of sliding up and down is inserted into the inner cavity of the sliding sleeve (631). A pressing plate (633) in contact with the piston (623) is installed at the top of the sliding rod (632). The bottom of the sliding rod (632) is connected to the top end of the chain (64).

6. The sling with a safety protection device according to claim 5, characterized in that, The positioning component (66) includes a box body (661) installed on the outer wall of the lifting hook (65). A first gear (662) and a first reel (663) are installed in the left cavity of the box body (661) from front to back through a pin shaft. A strap (664) is wound around the outer wall of the first reel (663). One end of the strap (664) extends out of the left side wall of the box body (661) and is provided with a hanging ring (665). The hanging ring (665) can be sleeved on the lifting hook (65). A traction part (666) is installed on the right side of the inner cavity of the box body (661).

7. The spreader with a safety protection device according to claim 6, characterized in that, The traction part (666) includes a mounting plate (6661) installed on the right side of the inner cavity of the box body (661). Two symmetrically arranged guide rods (6662) are installed on the right side of the inner cavity of the box body (661), and the guide rods (6662) are located in front of the mounting plate (6661). A sliding seat (6663) capable of sliding up and down is sleeved on the outer wall of the guide rod (6662). A fixed pulley (6664) is installed on the front surface of the sliding seat (6663). A second rotating shaft (6665) capable of rotating around its own axis is installed on the front surface of the mounting plate (6661) through a bearing. A second gear (6666) is installed on the outer wall of the second rotating shaft (6665). A torsion spring (6667) is sleeved on the outer wall of the second rotating shaft (6665). The two ends of the torsion spring (6667) are respectively clamped with the outer wall of the second rotating shaft (6665) and the second gear (6666). Under the action of the torsion force of the torsion spring (6667), the second gear (6666) is driven to rotate counterclockwise. A rack (6668) meshed with the second gear (6666) is installed on the outer wall of the sliding seat (6663). A second reel (6669) and a third gear (66610) are installed on the front left side of the mounting plate (6661) from front to back through a pin shaft, and the third gear (66610) is meshed with the first gear (662). A traction rope (66611) is lapped on the outer wall of the fixed pulley (6664). One end of the traction rope (66611) is wound around the outer wall of the second reel (6669), and the other end of the traction rope (66611) is connected to the right inner wall of the box body (661).

8. A spreader with a safety protection device according to claim 7, characterized in that, The two racks (6668) are respectively located on the left and right sides of the second gear (6666).

9. The spreader with a safety protection device according to claim 8, characterized in that, The number of teeth of the third gear (66610) is more than three times that of the first gear (662).

10. The spreader with a safety protection device according to claim 9, characterized in that, The cooperation of the second gear (6666) and the rack (6668) enables the two fixed pulleys (6664) to move in opposite directions, increasing the traction length of the traction rope (66611). The second reel (6669) plays a role in winding and releasing the traction rope (66611).

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