Double-shuttle-shaped telescopic opening and closing device

Abstract

The invention provides a double-shuttle-shaped telescopic opening and closing device, and relates to the technical field of slings, the double-shuttle-shaped telescopic opening and closing device comprises a beam body, an upper box body and a support, the upper box body is arranged at the middle position above the beam body, a double-shuttle-shaped disc is rotatably arranged at the middle position in the upper box body, and concave positions and convex positions are arranged on the two sides of the double-shuttle-shaped disc; opening and closing of the lifting appliance are achieved through rapid opening and closing, the rotating lifting piece inclines towards one side by more than 90 degrees to drive the lifting shaft to rotate, the lifting shaft drives the ratchet wheel to rotate, the ratchet wheel rotates by more than 90 degrees, the upper ratchet and the lower ratchet cross the pawl and stop still, then the rotating lifting piece ascends and resets, the ratchet wheel rotates, and the pawl is driven by the ratchets to rotate along with the ratchet wheel. The pawl drives the double-shuttle-shaped disc to rotate, due to the fact that the thicknesses of concave positions and convex positions on the double-shuttle-shaped disc are different, the elastic rod assembly can stretch out and retract, then unlocking and limiting locking of the elastic rod assembly and a limiting plate of the support are achieved, and the design requirements for opening and closing of the lifting appliance are met.

Description

Technical Field

[0001] The invention relates to the technical field of slings, and in particular to a double-shuttle-shaped telescopic opening and closing device. Background Art

[0002] A sling is a device used in lifting machinery to lift heavy objects. It is usually made of steel cables, wire ropes, steel chains, alloy steel and other materials. It includes hooks, slings, rings, lifting suction cups, clamps, forks and other types. It is widely used in industries such as industry and logistics. Usually, a sling realizes the need for semi-automatic operation through an opening and closing device in coordination with the opening and closing action of the sling's legs. The opening and closing of the sling is a key function of the sling in the early stage of lifting the objects. Most of the existing opening and closing devices adopt a threaded rotation type, which occasionally cannot be accurately positioned and may become disengaged. In addition, the operation is inconvenient and invisible. Therefore, the present invention proposes a double shuttle-shaped telescopic opening and closing device to solve the problems existing in the prior art. Summary of the invention

[0003] In view of the above problems, the present invention proposes a double shuttle-shaped telescopic opening and closing device, which drives the pawl to follow the rotation through the ratchet, and the pawl drives the double shuttle-shaped disc to rotate. Due to the different thicknesses of the concave and convex positions on the double shuttle-shaped disc, the elastic rod assembly can be in two states of extension and retraction, thereby achieving unlocking and limit locking with the limit plate of the bracket, thereby meeting the design requirements of opening and closing of the sling.

[0004] To achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a double shuttle-shaped telescopic opening and closing device, including a beam body, an upper box body and a bracket, the upper box body is arranged at the middle position above the beam body, and a double shuttle-shaped disc is rotatably arranged at the middle position inside the upper box body, both sides of the double shuttle-shaped disc are provided with concave positions and convex positions, and a mounting ring is arranged at the middle position of one side of the double shuttle-shaped disc, both ends of the mounting ring are elastically rotatably provided with ratchets, the interior of the upper box body is rotatably provided with a hanging shaft, and the hanging shaft movably passes through the middle end of the double shuttle-shaped disc, ratchets are arranged on both sides of the hanging shaft, and four groups of ratchets matching the ratchets are arranged at equal angles on the outer side of the ratchets, and a hanging hook is connected to the outer side of the hanging shaft; A lower box body is provided below the upper box body and between the beam body, and elastic rod assemblies are provided on both sides of the interior of the lower box body, the lower end of the double shuttle-shaped disc extends to the interior of the lower box body and is adapted to the elastic rod assemblies, the brackets respectively pass through both sides of the interior of the beam body, and a limiting plate adapted to the elastic rod assembly is provided on the inner side of the brackets.

[0005] A further improvement is that inner cavities are provided on both sides of the middle end of the lower box body, and outer sides of the two groups of inner cavities are provided with outer cavities penetrating the lower box body, and the diameter of the inner cavity is larger than the diameter of the outer cavity.

[0006] A further improvement is that the elastic rod assembly includes a telescopic pin and a compression spring, the telescopic pin is movably arranged inside the outer cavity, and the inner end of the telescopic pin extends to the inside of the inner cavity, a compression spring is provided inside the inner cavity, the inner end of the telescopic pin passes through the compression spring, and a retaining ring is provided at the inner end of the telescopic pin, and the retaining ring is limited at the inner end position of the compression spring.

[0007] A further improvement is that a roller is provided at the inner end of the telescopic pin, and the roller is pressed on the double shuttle-shaped disc.

[0008] A further improvement is that: the concave positions and convex positions on the double shuttle-shaped disc are each provided with two groups, and the two groups of concave positions and convex positions are staggered at equal angles around the center of the double shuttle-shaped disc.

[0009] A further improvement is that the pawl is rotatably mounted on the mounting ring via a hinge shaft, and a tension spring is connected between the pawl and the mounting ring.

[0010] A further improvement is that the ratchet is sleeved on the outside of the hanging shaft, and the ratchet and the hanging shaft are fixed by a first screw.

[0011] A further improvement is that a second screw is provided on one side of the hanging rod, and the inner end of the second screw is used to fix the hanging shaft.

[0012] A further improvement is that fastening bolts are provided at the four corners inside the upper box body, and the lower ends of the fastening bolts are used to connect and fix the lower box body.

[0013] The beneficial effects of the present invention are: 1. The present invention realizes the opening and closing of the spreader by rapid opening and closing. The hanging climb is rotated to one side and tilted more than 90° to drive the hanging shaft to rotate. The hanging shaft drives the ratchet to rotate. The ratchet rotates more than 90°, and the upper and lower ratchets pass over the pawl and stop. Then the hanging climb is rotated to rise and reset. The ratchet rotates, and the pawl is driven to follow the rotation through the ratchet. The pawl drives the double shuttle-shaped disc to rotate. Due to the different thicknesses of the concave and convex positions on the double shuttle-shaped disc, the elastic rod assembly can be in two states of extension and retraction, thereby achieving the unlocking (open state) and limit locking (closed state) of the limit plate of the bracket, meeting the design requirements for the opening and closing of the spreader.

[0014] 2. The present invention is convenient, safe and reliable, and the operation is visible and not easy to be disengaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the closed state of the present invention; Figure 2 It is a schematic diagram of the opening state of the present invention; Figure 3 It is a schematic diagram of the internal structure of the upper box body and the lower box body of the present invention; Figure 4 It is a schematic side view of the internal structure of the upper box body of the present invention; Figure 5 It is a schematic diagram of the double shuttle-shaped disc of the present invention.

[0016] Among them: 1. Beam body; 2. Upper box body; 3. Bracket; 4. Double shuttle-shaped disc; 5. Mounting ring; 6. Paw; 7. Ratchet; 8. Hanging; 9. Lower box body; 10. Limiting plate; 11. Inner cavity; 12. Outer cavity; 13. Telescopic pin; 14. Compression spring; 15. Retaining ring; 16. Roller; 17. Tension spring; 18. First screw; 19. Second screw; 20. Fastening bolt; 21. Hanging shaft. DETAILED DESCRIPTION

[0017] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0018] Embodiment 1 according to Figure 1 , 2 As shown in Figures 3, 4 and 5, this embodiment proposes a double shuttle-shaped telescopic opening and closing device, including a beam body 1, an upper box body 2 and a bracket 3, the upper box body 2 is arranged at the middle position above the beam body 1, and a double shuttle-shaped disc 4 is rotatably arranged at the middle position inside the upper box body 2, both sides of the double shuttle-shaped disc 4 are provided with concave positions and convex positions, and a mounting ring 5 is arranged at the middle position of one side of the double shuttle-shaped disc 4, and ratchet 6 is elastically rotatably arranged at both ends of the mounting ring 5, a hanging shaft 21 is rotatably arranged inside the upper box body 2, and the hanging shaft 21 movably passes through the middle end of the double shuttle-shaped disc 4, ratchets 7 are arranged on both sides of the hanging shaft 21, and four groups of ratchets matching the ratchet 6 are arranged at equal angles on the outer side of the ratchet 7, and a hanging 8 is connected to the outer side of the hanging shaft 21; A lower box body 9 is provided below the upper box body 2 and between the beam body 1, and elastic rod assemblies are provided on both sides of the lower box body 9. The lower end of the double shuttle-shaped disc 4 extends into the lower box body 9 and matches the elastic rod assemblies. The bracket 3 passes through both sides of the beam body 1, and a limit plate 10 matching the elastic rod assemblies is provided on the inner side of the bracket 3. The rotation of the hanging shaft 21 and the double shuttle-shaped disc 4 does not affect each other.

[0019] Inner cavities 11 are provided on both sides of the middle end of the lower box body 9, and outer sides of the two groups of inner cavities 11 are provided with outer cavities 12 penetrating the lower box body 9, and the diameter of the inner cavity 11 is larger than the diameter of the outer cavity 12. The elastic rod assembly includes a telescopic pin 13 and a compression spring 14, the telescopic pin 13 is movably arranged inside the outer cavity 12, and the inner end of the telescopic pin 13 extends to the inside of the inner cavity 11, and the inner cavity 11 is provided with a compression spring 14, the inner end of the telescopic pin 13 passes through the compression spring 14, and the inner end of the telescopic pin 13 is provided with a retaining ring 15, and the retaining ring 15 is limited at the inner end position of the compression spring 14. The inner end of the telescopic pin 13 is provided with a roller 16, and the roller 16 is pressed on the double shuttle disc 4.

[0020] When in use, the hanging climbing 8 descends and drives the hanging shaft 21 to follow. After the hanging climbing 8 tilts 90° to one side, it cannot descend. The hanging shaft 21 drives the ratchet 7 to rotate 90°, and the position of the main ratchet 6 is formed as one body. The hanging climbing 8 rotates upward, and the ratchet 7 drives the ratchet 6 to rotate at the same time. The ratchet 6 and the double shuttle-shaped disc 4 are integrated and rotate 90° at the same time. The contact position of the roller 16 with the edge of the double shuttle-shaped disc 4 changes from a convex position to a concave position. The roller 16 is subjected to the elastic force of the compression spring 14 to drive the telescopic pin 13 to retract inwardly, away from the limiting plate 10 of the bracket 3, and the hanging climbing 8 continues to rotate upward. In the open state; after the hanging climbing 8 descends and tilts to one side 90° again, the hanging shaft 21 drives the ratchet 7 to rotate 90° again, and the main pawl 6 is clamped in the position to form a whole again, the hanging climbing 8 rotates upward, and the ratchet 7 drives the pawl 6 to rotate at the same time. The pawl 6 and the double shuttle-shaped disc 4 are integrated and rotate 90° at the same time. The contact position between the roller 16 and the edge of the double shuttle-shaped disc 4 changes from a concave position to a convex position. The roller 16 is squeezed and drives the telescopic pin 13 to extend outward and overlap with the limit plate 10. The hanging climbing 8 continues to rotate upward, and the sling is in a closed state, completing a working cycle.

[0021] The concave and convex positions on the double shuttle-shaped disc 4 are each provided with two groups, and the two groups of concave and convex positions are staggered at equal angles around the center of the double shuttle-shaped disc 4. The rotation switching angle of 90° is maintained.

[0022] Embodiment 2 according to Figure 1 , 2As shown in Figures 3, 4 and 5, this embodiment proposes a double shuttle-shaped telescopic opening and closing device, including a beam body 1, an upper box body 2 and a bracket 3, the upper box body 2 is arranged at the middle position above the beam body 1, and a double shuttle-shaped disc 4 is rotatably arranged at the middle position inside the upper box body 2, both sides of the double shuttle-shaped disc 4 are provided with concave positions and convex positions, and a mounting ring 5 is arranged at the middle position of one side of the double shuttle-shaped disc 4, and ratchet 6 is elastically rotatably arranged at both ends of the mounting ring 5, a hanging shaft 21 is rotatably arranged inside the upper box body 2, and the hanging shaft 21 movably passes through the middle end of the double shuttle-shaped disc 4, ratchets 7 are arranged on both sides of the hanging shaft 21, and four groups of ratchets matching the ratchet 6 are arranged at equal angles on the outer side of the ratchet 7, and a hanging 8 is connected to the outer side of the hanging shaft 21; A lower box body 9 is provided below the upper box body 2 and between the beam body 1, and elastic rod assemblies are provided on both sides of the lower box body 9. The lower end of the double shuttle-shaped disc 4 extends into the lower box body 9 and matches the elastic rod assemblies. The bracket 3 passes through both sides of the beam body 1, and a limit plate 10 matching the elastic rod assemblies is provided on the inner side of the bracket 3. The rotation of the hanging shaft 21 and the double shuttle-shaped disc 4 does not affect each other.

[0023] The concave and convex positions on the double shuttle-shaped disc 4 are each provided with two groups, and the two groups of concave and convex positions are staggered at equal angles around the center of the double shuttle-shaped disc 4. The rotation switching angle of 90° is maintained.

[0024] The pawl 6 is rotatably mounted on the mounting ring 5 via a hinge shaft, and a tension spring 17 is connected between the pawl 6 and the mounting ring 5. The pawl 6 is rotated by the compression of the ratchet teeth and then pulled by the tension spring 17 to reset.

[0025] The ratchet 7 is sleeved on the outside of the hanging shaft 21, and the ratchet 7 and the hanging shaft 21 are fixed by a first screw 18. The ratchet 7 and the hanging shaft 21 are fixed by the first screw 18.

[0026] A second screw 19 is provided on one side of the hanging hook 8, and the inner end of the second screw 19 is used to fix the hanging shaft 21. The hanging shaft 21 and the hanging hook 8 are fixed by the second screw 19.

[0027] The four corners of the upper box body 2 are provided with fastening bolts 20, and the lower ends of the fastening bolts 20 are used to connect and fix the lower box body 9. The upper box body 2 and the lower box body 9 are fixed by the fastening bolts 20.

[0028] The double shuttle-shaped telescopic opening and closing device realizes the opening and closing of the sling by quick opening and closing. The hanging climbing 8 is rotated to tilt to one side more than 90° to drive the hanging shaft 21 to rotate, and the hanging shaft 21 drives the ratchet 7 to rotate. The ratchet 7 rotates more than 90°, and the upper and lower ratchets pass over the pawl 6 and stop. Then the hanging climbing 8 is rotated to rise and reset, and the ratchet 7 rotates, driving the pawl 6 to follow the rotation through the ratchet teeth, and the pawl 6 drives the double shuttle-shaped disc 4 to rotate. Due to the different thicknesses of the concave and convex positions on the double shuttle-shaped disc 4, the elastic rod assembly can be in two states of extension and retraction, thereby achieving the unlocking (open state) and limit locking (closed state) of the limit plate 10 of the bracket 3, meeting the design requirements for opening and closing of the sling, and is convenient, safe and reliable, and the operation is visible and not easy to disengage.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A double shuttle-shaped telescopic opening and closing device, comprising a beam body (1), an upper box body (2) and a bracket (3), characterized in that: The upper box body (2) is arranged at a middle position above the beam body (1), and a double shuttle-shaped disc (4) is rotatably provided at a middle position inside the upper box body (2), both sides of the double shuttle-shaped disc (4) are provided with concave positions and convex positions, and a mounting ring (5) is provided at a middle position on one side of the double shuttle-shaped disc (4), and ratchets (6) are elastically rotatably provided at both ends of the mounting ring (5), a hanging shaft (21) is rotatably provided inside the upper box body (2), and the hanging shaft (21) movably passes through the middle end of the double shuttle-shaped disc (4), ratchets (7) are provided on both sides of the hanging shaft (21), and four groups of ratchets matching the ratchets (6) are provided at equal angles on the outer side of the ratchets (7), and a hanging hook (8) is connected to the outer side of the hanging shaft (21); A lower box body (9) is provided below the upper box body (2) and between the beam body (1), and elastic rod assemblies are provided on both sides of the interior of the lower box body (9). The lower ends of the double shuttle-shaped discs (4) extend into the interior of the lower box body (9) and are compatible with the elastic rod assemblies. The brackets (3) respectively penetrate both sides of the interior of the beam body (1), and a limit plate (10) compatible with the elastic rod assemblies is provided on the inner side of the brackets (3).

2. A double shuttle-shaped telescopic opening and closing device according to claim 1, characterized in that: Inner cavities (11) are provided on both sides of the middle end of the lower box body (9), and outer sides of the two groups of inner cavities (11) are provided with outer cavities (12) penetrating the lower box body (9), and the diameter of the inner cavity (11) is larger than the diameter of the outer cavity (12).

3. A double shuttle-shaped telescopic opening and closing device according to claim 2, characterized in that: The elastic rod assembly comprises a telescopic pin (13) and a compression spring (14); the telescopic pin (13) is movably arranged inside the outer cavity (12), and the inner end of the telescopic pin (13) extends into the inner cavity (11); a compression spring (14) is arranged inside the inner cavity (11); the inner end of the telescopic pin (13) passes through the compression spring (14); a retaining ring (15) is arranged at the inner end of the telescopic pin (13); and the retaining ring (15) is limited at the inner end position of the compression spring (14).

4. A double shuttle-shaped telescopic opening and closing device according to claim 3, characterized in that: A roller (16) is provided at the inner end of the telescopic pin (13), and the roller (16) is pressed on the double shuttle-shaped disc (4).

5. The double shuttle-shaped telescopic opening and closing device according to claim 1, characterized in that: The concave positions and convex positions on the double shuttle-shaped disc (4) are each provided with two groups, and the two groups of concave positions and convex positions are staggered at equal angles around the center of the double shuttle-shaped disc (4).

6. A double shuttle-shaped telescopic opening and closing device according to claim 1, characterized in that: The pawl (6) is rotatably mounted on the mounting ring (5) via a hinge shaft, and a tension spring (17) is connected between the pawl (6) and the mounting ring (5).

7. The double shuttle-shaped telescopic opening and closing device according to claim 1, characterized in that: The ratchet (7) is sleeved on the outside of the hanging shaft (21), and the ratchet (7) and the hanging shaft (21) are fixed by a first screw (18).

8. A double shuttle-shaped telescopic opening and closing device according to claim 7, characterized in that: A second screw (19) is provided on one side of the hanging bracket (8), and the inner end of the second screw (19) is used to fix the hanging shaft (21).

9. A double shuttle-shaped telescopic opening and closing device according to claim 8, characterized in that: Fastening bolts (20) are provided at the four corners inside the upper box body (2), and the lower ends of the fastening bolts (20) are used to connect and fix the lower box body (9).

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