A lifting device with a safety protection device

Abstract

The present application relates to the field of lifting appliance, specifically to a lifting appliance with safety protection device, including lifting beam, the lifting beam front center position is equipped with alarm lamp, the lifting beam front left and right ends are equipped with display, the lifting beam bottom is welded with crossbeam, and the crossbeam outer wall is provided with jack, the crossbeam left and right sides are all installed with support seat, the support seat bottom is installed with grabbing mechanism, display shows the weight of the weight that grabbing mechanism grabs;The grabbing mechanism includes the rotating assembly installed at the bottom of the support seat, the rotating assembly bottom is provided with weight weighing assembly and limiting assembly, the limiting assembly bottom is installed with chain one end, the other end of the chain is installed with lifting hook, the lifting hook outer wall is installed with positioning assembly.Chain has double insurance, prevents the hidden danger of chain bearing capacity over limit and brings, the stable transfer process realizes the stretching or storage of bandage, can realize the hoisting of various types of heavy objects, improves the versatility.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, specifically a lifting equipment with a safety protection device. Background Technology

[0002] Lifting gear refers to the devices used in lifting machinery to lift heavy objects. Commonly used lifting gear includes specialized rigging such as hooks, wire ropes, and chains. Lifting suction cups, clamps, and forks can be used as dedicated lifting gear on cranes for extended periods, or they can be used temporarily as replaceable auxiliary lifting gear attached to the hook. They are commonly used in multi-cargo warehouses and storage yards to improve operational efficiency.

[0003] The shape of the heavy object is an uncertain factor. When the hook is hung on the heavy object for lifting, if the chain tilts more than 60 degrees, the chain's load-bearing capacity will exceed its limit, posing a safety hazard. For heavy objects with smooth surfaces or without lifting rings, it is impossible to lift them. The lifting method is limited and cannot adapt to the transfer of various types of heavy objects. Summary of the Invention

[0004] The purpose of this invention is to provide a lifting device with a safety protection device to solve the problems mentioned in the background art, such as the inability to predict the chain's load-bearing capacity, the safety hazards during lifting, and the difficulty in adapting to the transportation of various types of heavy objects.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting device with a safety protection device, including a lifting beam, an alarm light installed at the center of the front of the lifting beam, displays installed at both ends of the front of the lifting beam, a crossbeam welded to the bottom of the lifting beam, and insertion holes provided on the outer wall of the crossbeam, support seats installed on both the left and right sides of the crossbeam, and a gripping mechanism installed at the bottom of the support seats, the displays showing the weight borne by the gripping mechanism when gripping a heavy object.

[0006] Preferably, the gripping mechanism includes a rotating component installed at the bottom of the support base. The bottom of the rotating component is provided with a weighing component and a limiting component. One end of a chain is installed at the bottom of the limiting component, and a hook is installed at the other end of the chain. A positioning component is installed on the outer wall of the hook.

[0007] Preferably, the rotating assembly includes a mounting base installed at the bottom of the support base. A limit switch electrically connected to the alarm light is installed at the top of the inner cavity of the mounting base. A first rotating shaft capable of rotating around its own axis is installed in the middle of the inner cavity of the mounting base via a bearing. A turntable is installed at the center of the outer wall of the first rotating shaft. A slide rail is opened on the side wall of the turntable. An ear plate is installed on the outer wall of the first rotating shaft. The turntable and the ear plate rotate synchronously through the first rotating shaft. The limit switch monitors the rotation angle of the turntable, thereby preventing the tilt angle from exceeding the limit when the chain lifts heavy objects, and avoiding chain overload and safety hazards.

[0008] Preferably, the length of the slide is one-third of the circumference of the turntable sidewall, and the two sides of the slide are inclined surfaces.

[0009] Preferably, the weighing assembly includes a hydraulic tank installed at the center of the inner side of the ear plate. The inner cavity of the hydraulic tank is filled with hydraulic oil. A piston capable of sliding up and down is inserted into the top of the inner cavity of the hydraulic tank. A hydraulic weighing sensor electrically connected to a display is installed on the side wall of the hydraulic tank. The hydraulic weighing sensor measures the weight by detecting changes in hydraulic oil pressure. When the limiting assembly squeezes the piston, the hydraulic oil pressure increases, and the weight of the load on the chain is detected by the hydraulic weighing sensor to prevent the chain from being overloaded.

[0010] Preferably, the limiting component 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 pressure plate that contacts the piston is installed on the top of the sliding rod, and the bottom of the sliding rod is connected to the top of the chain.

[0011] Preferably, the positioning component includes a box body installed on the outer wall of the hook. A first gear and a first reel are installed from front to back on the left side of the inner cavity of the box body via a pin. A strap is wound around the outer wall of the first reel body. One end of the strap extends out of the left side wall of the box body and is fitted with a hanging ring that 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 unit includes a mounting plate installed on the right side of the inner cavity of the box. Two symmetrical guide rods are installed on the right side of the inner cavity of the box, and the guide rods are located on the front side of the mounting plate. A sliding block that can slide up and down is sleeved on the outer wall of the guide rod. A fixed pulley is installed on the front of the sliding block. A second rotating shaft that can rotate around its own axis is installed on the front 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. The two ends of the torsion spring are respectively engaged with the outer wall of the second rotating shaft and the second gear. Under the torsion force of the torsion spring, the second gear is driven to rotate counterclockwise. A rack that meshes with the second gear is installed on the outer wall of the sliding block. A second spool and a third gear are installed from front to back on the left side of the front of the mounting plate through a pin, and the third gear meshes with the first gear. A traction rope is attached to the outer wall of the fixed pulley. One end of the traction rope is wrapped around the outer wall of the second spool, and the other end of the traction rope is connected to the right inner wall of the box.

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

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

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

[0016] Compared with the prior art, the beneficial effects of the embodiments of the present invention are:

[0017] 1. When the chain bears the weight of a heavy object, the chain pulls the ear plate to rotate, which in turn makes the turntable rotate. When the slide presses the limit switch, the alarm light is powered on and illuminates, indicating that the chain tilt angle has exceeded the limit. The chain pulls the slide bar, the pressure plate presses down the piston, the hydraulic oil pressure increases, and the hydraulic weighing sensor measures the weight borne by the chain. Therefore, the chain has double insurance to prevent the chain load-bearing capacity from exceeding the limit and causing safety hazards, and the transfer process is stable.

[0018] 2. Under the transmission of the second gear and rack, the two slides can slide in opposite directions. When the strap is dragged, the first reel releases the strap. When it is retracted, the torsion spring torque causes the second gear to rotate counterclockwise, the fixed pulley pulls the traction rope, and the second reel releases the traction rope. Under the transmission of the first gear and the third gear, the first reel winds up the strap. Therefore, the strap can be stretched or retracted, enabling the lifting of various types of heavy objects and improving its versatility. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 for Figure 1 A schematic diagram of a partial structure;

[0021] Figure 3 A schematic diagram of the grasping mechanism structure;

[0022] Figure 4 for Figure 3 A schematic diagram of a local structure in the image;

[0023] Figure 5 Exploded view of the weighing assembly;

[0024] Figure 6 This is a schematic diagram of the limit component structure;

[0025] Figure 7 This is a schematic diagram of the positioning component structure;

[0026] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0027] In the diagram: 1. Lifting beam; 2. Alarm light; 3. Display; 4. Crossbeam; 5. Support base; 6. Gripping mechanism; 61. Rotating assembly; 62. Weighing assembly; 63. Limiting assembly; 64. Chain; 65. Hook; 66. Positioning assembly; 611. Mounting base; 612. Limit switch; 613. First rotating shaft; 614. Turntable; 615. Slide rail; 616. Ear plate; 621. Hydraulic tank; 622. Hydraulic oil; 623. Piston; 624. Hydraulic weighing sensor; 6 31. Sliding sleeve; 632. Sliding rod; 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. Sliding seat; 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

[0028] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0029] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying 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 with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Please see Figures 1-8 As shown in the embodiment of the present invention, a lifting device with a safety protection device includes a lifting beam 1, an alarm light 2 installed at the center of the front of the lifting beam 1, displays 3 installed at both the left and right ends of the front of the lifting beam 1, a crossbeam 4 welded to the bottom of the lifting beam 1, and an insertion hole provided on the outer wall of the crossbeam 4. Support seats 5 are installed on both the left and right sides of the crossbeam 4, and a gripping mechanism 6 is installed at the bottom of the support seat 5. The displays 3 show the weight borne by the gripping mechanism 6 when gripping a heavy object.

[0031] Furthermore, the gripping mechanism 6 includes a rotating component 61 installed at the bottom of the support base 5. The bottom of the rotating component 61 is provided with a weight weighing component 62 and a limiting component 63. One end of a chain 64 is installed at the bottom of the limiting component 63, and a hook 65 is installed at the other end of the chain 64. A positioning component 66 is installed on the outer wall of the hook 65.

[0032] Furthermore, the rotating assembly 61 includes a mounting base 611 installed at the bottom of the support base 5. A limit switch 612 electrically connected to the alarm light 2 is installed at the top of the inner cavity of the mounting base 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 base 611 via a bearing. A turntable 614 is installed at the center of the outer wall of the first rotating shaft 613. A slide rail 615 is opened on the side wall of the turntable 614. The length of the slide rail 615 is one-third of the circumference of the side wall of the turntable 614, and the two sides of the slide rail 615 are inclined. When the rotation angle of the turntable 614 exceeds 120 degrees, the slide rail 615 will trigger the limit switch 612 to monitor the tilt angle of the chain 64. An ear plate 616 is installed on the outer wall of the first rotating shaft 613, and the turntable 614 and the ear plate 616 rotate synchronously through the first rotating shaft 613.

[0033] Furthermore, the weighing assembly 62 includes a hydraulic tank 621 installed at the center of the inner side of 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 changes in the pressure of the hydraulic oil 622.

[0034] Furthermore, the limiting assembly 63 includes a sliding sleeve 631 installed at the front and rear ends of the bottom of the ear plate 616. A sliding rod 632 that can slide up and down is inserted into the inner cavity of the sliding sleeve 631. A pressure plate 633 that contacts the piston 623 is installed on the top of the sliding rod 632. The bottom of the sliding rod 632 is connected to the top of the chain 64.

[0035] Furthermore, the positioning component 66 includes a box 661 installed on the outer wall of the hook 65. A first gear 662 and a first reel 663 are installed from front to back on the left side of the inner cavity of the box 661 via a pin. 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 661 and is fitted with a hanging ring 665. The hanging ring 665 can be fitted onto the hook 65. A traction part 666 is installed on the right side of the inner cavity of the box 661.

[0036] Furthermore, the traction unit 666 includes a mounting plate 6661 installed on the right side of the inner cavity of the housing 661. Two symmetrical guide rods 6662 are installed on the right side of the inner cavity of the housing 661, and the guide rods 6662 are located in front of the mounting plate 6661. A sliding block 6663 that can slide up and down is sleeved on the outer wall of the guide rod 6662. A fixed pulley 6664 is installed on the front of the sliding block 6663. A second rotating shaft 6665 that can rotate around its own axis is installed on the front 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 connected to the first gear 6666. The outer wall of the second rotating shaft 6665 is engaged with the second gear 6666. Under the torque of the torsion spring 6667, the second gear 6666 is driven to rotate counterclockwise. The outer wall of the slide block 6663 is equipped with a rack 6668 that meshes with the second gear 6666. The second reel 6669 and the third gear 66610 are installed from front to back on the left side of the front of the mounting plate 6661 via a pin. The third gear 66610 meshes with the first gear 662. The outer wall of the fixed pulley 6664 is covered with a traction rope 66611. One end of the traction rope 66611 is wrapped 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 661.

[0037] Furthermore, the two racks 6668 are located on the left and right sides of the second gear 6666 respectively. Under the transmission conditions of the racks 6668 and the second gear 6666, the two slides 6663 can move in opposite directions to increase the traction distance of the traction rope 66611.

[0038] Furthermore, the number of teeth on the third gear 66610 is more than three times that of the first gear 662, which increases the angular velocity of the first gear 662, thereby increasing the winding length of the strap 664.

[0039] Working principle

[0040] Step 1: Hook 65 is hung on the heavy object. When the lifting beam 1 is lifted by the overhead crane or gantry crane, 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.

[0041] Step 2: Once the end of the slide rail 615 presses against the limit switch 612, the limit switch 612 is triggered and supplies power to the alarm light 2. The alarm light 2 lights up and alarms, indicating that the tilt angle of the chain 64 exceeds the safe operating angle of the chain 64.

[0042] The chain 64 pulls down the slide bar 632, causing the pressure plate 633 to press down the piston 623. The piston 623 squeezes the hydraulic oil 622. The hydraulic weighing sensor 624 calculates the weight of the load on the chain 64 based on the change in the hydraulic oil pressure of the hydraulic oil 622 and displays it on the display 3, realizing the detection of the chain 64 during use.

[0043] Step 3: When it is necessary to transfer heavy objects that are inconvenient 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 traction rope 66611. The traction rope 66611 pulls the two first fixed pulleys 6664 to move inward, wrapping the strap 664 around the outside of the heavy object. Then, put the hanging ring 665 on the hook 65, and the strap 664 can be used to lift the heavy object, realizing the transfer of irregularly shaped or cylindrical heavy objects.

[0044] When the hanging ring 665 is removed from the hook 65, the torque of the torsion spring 6667 drives the second gear 6666 to rotate counterclockwise. Under the transmission of the second gear 6666 and the rack 6668, the two fixed pulleys 6664 move outwards simultaneously, pulling the second reel 6669 to release the traction rope 66611. The second reel 6669 rotates clockwise. Under the transmission of the first gear 662 and the third gear 66610, the first reel 663 rotates counterclockwise, winding up the strap 664 to realize the storage of the strap 664.

[0045] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these should also be considered within the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A lifting device with a safety protection device, comprising a lifting beam (1), characterized in that, An alarm light (2) is installed at the center of the front of the lifting beam (1). A display (3) is installed at both the left and right ends of the front of the lifting beam (1). A crossbeam (4) is welded to the bottom of the lifting beam (1), and a hole is provided on the outer wall of the crossbeam (4). A support seat (5) is installed on both the left and right sides of the crossbeam (4). A gripping mechanism (6) is installed at the bottom of the support seat (5). The display (3) shows the weight borne by the gripping mechanism (6) when gripping the heavy object. The gripping mechanism (6) includes a rotating component (61) installed at the bottom of the support base (5). The bottom of the rotating component (61) is provided with a weighing component (62) and a limiting component (63). One end of a chain (64) is installed at the bottom of the limiting component (63), and a hook (65) is installed at the other end of the chain (64). A positioning component (66) is installed on the outer wall of the hook (65). The positioning component (66) includes a box (661) installed on the outer wall of the hook (65). A first gear (662) and a first reel (663) are installed from front to back on the left side of the inner cavity of the box (661) via a pin. A strap (664) is wrapped 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 (661) and is fitted 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 of the inner cavity of the box (661). The traction unit (666) includes a mounting plate (6661) installed on the right side of the inner cavity of the box (661). Two symmetrical guide rods (6662) are installed on the right side of the inner cavity of the box (661), and the guide rods (6662) are located in front of the mounting plate (6661). A sliding block (6663) that can slide up and down is sleeved on the outer wall of the guide rod (6662). A fixed pulley (6664) is installed on the front of the sliding block (6663). A second rotating shaft (6665) that can rotate around its own axis is installed on the front 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 connected to... The outer wall of the second rotating shaft (6665) is engaged with the second gear (6666). Under the torque of the torsion spring (6667), the second gear (6666) is driven to rotate counterclockwise. The outer wall of the slide block (6663) is equipped with a rack (6668) that meshes with the second gear (6666). The left side of the front of the mounting plate (6661) is equipped with a second spool (6669) and a third gear (66610) from front to back through a pin. The third gear (66610) meshes with the first gear (662). The outer wall of the fixed pulley (6664) is covered with a traction rope (66611). One end of the traction rope (66611) is wrapped around the outer wall of the second spool (6669), and the other end of the traction rope (66611) is connected to the right inner wall of the box (661). The rotating assembly (61) includes a mounting base (611) installed at the bottom of the support base (5). A limit switch (612) electrically connected to the alarm light (2) is installed at the top of the inner cavity of the mounting base (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 base (611) via a bearing. A turntable (614) is installed at the center of the outer wall of the first rotating shaft (613). A slide rail (615) is opened 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). The chain (64) pulls the ear plate (616) to rotate, thereby causing the turntable (614) to rotate. When the slide rail (615) squeezes the limit switch (612), the alarm light (2) is powered on and illuminates. The weighing assembly (62) includes a hydraulic tank (621) installed at the center of the inner side of the ear plate (616). The inner cavity of the hydraulic tank (621) is filled with hydraulic oil (622). A piston (623) that can slide 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). The chain (64) pulls down the limiting assembly (63), causing the limiting assembly (63) to press down the piston (623).

2. A lifting device with a safety protection device according to claim 1, characterized in that, The length of the slide (615) is one-third of the circumference of the side wall of the turntable (614), and the two sides of the slide (615) are inclined surfaces.

3. A lifting device with a safety protection device according to claim 2, characterized in that, The limiting component (63) includes a sliding sleeve (631) installed at the front and rear ends of the bottom of the ear plate (616). The inner cavity of the sliding sleeve (631) is fitted with a sliding rod (632) that can slide up and down. The top of the sliding rod (632) is fitted with a pressure plate (633) that contacts the piston (623). The bottom of the sliding rod (632) is connected to the top of the chain (64).

4. A lifting device with a safety protection device according to claim 3, characterized in that, The two racks (6668) are located on the left and right sides of the second gear (6666), respectively.

5. A lifting device with a safety protection device according to claim 4, characterized in that, The number of teeth of the third gear (66610) is more than three times the number of teeth of the first gear (662).

6. A lifting device with a safety protection device according to claim 5, characterized in that, The second gear (6666) and rack (6668) work together to make the two fixed pulleys (6664) move in opposite directions, increasing the traction length of the traction rope (66611). The second reel (6669) plays the role of winding and releasing the traction rope (66611).

Images