A double shuttle-shaped telescopic opening and closing device

Abstract

The present invention provides a double-shuttle-shaped telescopic opening and closing device, which relates to the technical field of slings, including a beam body, an upper box body and a bracket, wherein the upper box body is arranged at a middle position above the beam body, and a double-shuttle-shaped disc is rotatably provided at a middle position inside the upper box body, and both sides of the double-shuttle-shaped disc are provided with a concave position and a convex position; the present invention realizes the opening and closing of the sling by rapid opening and closing, and the rotating lifting climb is tilted more than 90 degrees to one side to drive the lifting shaft to rotate, and the lifting shaft drives the ratchet to rotate, and the ratchet rotates more than 90 degrees, and the upper and lower ratchets pass over the pawl and stop, and then the lifting climb is rotated to rise and reset, and the ratchet rotates, and the pawl is driven to follow the rotation by the ratchet, and the pawl drives the double-shuttle-shaped disc to rotate, and due to the different thicknesses of the concave position and the convex position on the double-shuttle 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, meeting the design requirements of opening and closing of the sling.

Description

Technical Field

[0001] The invention relates to the technical field of slings, 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.

[0003] Usually, a sling realizes the semi-automatic operation requirement by coordinating the opening and closing action of the sling legs with an opening and closing device. 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

[0004] In response to the above problems, the present invention proposes a double-shuttle-shaped telescopic opening and closing device, which drives the pawl to rotate through the ratchet, and the pawl drives the double-shuttle-shaped disc to rotate. Due to the different thicknesses of the concave and convex parts 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, meeting the design requirements of opening and closing of the sling.

[0005] 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, comprising a beam body, an upper box body and a bracket, the upper box body is arranged at a middle position above the beam body, and a double-shuttle-shaped disc is rotatably provided at the middle position inside the upper box body, both sides of the double-shuttle-shaped disc are provided with a concave position and a convex position, and a mounting ring is provided at the middle position of one side of the double-shuttle-shaped disc, both ends of the mounting ring are elastically rotatably provided with a pawl, the interior of the upper box body is provided with a hanging shaft for rotation, and the hanging shaft movably passes through the middle end of the double-shuttle-shaped disc, ratchets are provided on both sides of the hanging shaft, and four groups of ratchet teeth adapted to the pawls are provided at equal angles on the outer side of the ratchet, and a hanging hook is connected to the outer side of the hanging shaft;

[0006] 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 assembly. The bracket passes through both sides of the interior of the beam body respectively, and a limiting plate adapted to the elastic rod assembly is provided on the inner side of the bracket.

[0007] 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 that pass through the lower box body, and the diameter of the inner cavity is larger than that of the outer cavity.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] A further improvement is that a second screw is provided on one side of the hanging hook, and the inner end of the second screw is used to fix the hanging shaft.

[0014] 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.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention realizes the opening and closing of the spreader by quick opening and closing. The lifting bracket is rotated to one side and tilted more than 90 degrees to drive the hanging shaft to rotate, and the hanging shaft drives the ratchet to rotate. The ratchet rotates more than 90 degrees, and the upper and lower ratchets pass over the pawl and stop. Then the lifting bracket is rotated to rise and reset, and the ratchet rotates, and the pawl is driven to rotate by the ratchet teeth. The pawl drives the double shuttle-shaped disc to rotate. Due to the different thicknesses of the concave and convex parts on the double shuttle-shaped disc, the elastic rod assembly can be in two states of extension and retraction, thereby achieving unlocking (open state) and limit locking (closed state) with the limit plate of the bracket, meeting the design requirements of opening and closing of the spreader.

[0017] 2. The present invention is convenient, safe and reliable, and the operation is visible and not easy to disengage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a schematic diagram of the closed state of the present invention;

[0019] Figure 2 This is a schematic diagram of the open state of the present invention;

[0020] Figure 3 Schematic diagram of the internal structure of the upper box and the lower box of the present invention;

[0021] Figure 4 It is a side view schematic diagram of the internal structure of the upper box body of the present invention;

[0022] Figure 5 It is a schematic diagram of the double-shuttle disc of the present invention.

[0023] Among them: 1. Beam; 2. Upper box; 3. Bracket; 4. Double shuttle disc; 5. Mounting ring; 6. Pawl; 7. Ratchet; 8. Hanging rod; 9. Lower box; 10. Limit 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

[0024] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the examples. The examples are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0025] Example 1

[0026] 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 provided at the middle position above the beam body 1, and a double-shuttle-shaped disc 4 is rotatably provided at the middle position inside the upper box body 2. Both sides of the double-shuttle-shaped disc 4 are provided with concave and convex positions, and a mounting ring 5 is provided at the middle position of one side of the double-shuttle-shaped disc 4. Both ends of the mounting ring 5 are elastically rotatably provided with pawls 6. 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 adapted to the pawls 6 are provided at equal angles on the outer side of the ratchet 7. A hanging climb 8 is connected to the outer side of the hanging shaft 21.

[0027] A lower box body 9 is located below the upper box body 2 and between the beam body 1. Elastic rod assemblies are located on both sides of the lower box body 9. The lower ends of the double shuttle-shaped discs 4 extend into the lower box body 9 and mate with the elastic rod assemblies. The brackets 3 extend through both sides of the beam body 1, and stop plates 10 are located on the inner sides of the brackets 3, mate with the elastic rod assemblies. The rotation of the suspension shaft 21 and the double shuttle-shaped discs 4 does not affect each other.

[0028] The lower housing 9 has inner cavities 11 on both sides of its mid-end, and both sets of inner cavities 11 are each provided with an outer cavity 12 extending through the lower housing 9. The inner cavity 11 has a larger diameter than the outer cavity 12. The elastic rod assembly includes a telescopic pin 13 and a compression spring 14. The telescopic pin 13 is movably mounted within the outer cavity 12, and its inner end extends into the inner cavity 11. The compression spring 14 is mounted within the inner cavity 11, and the inner end of the telescopic pin 13 passes through the compression spring 14. A retaining ring 15 is mounted on the inner end of the telescopic pin 13, which is retained at the inner end of the compression spring 14. A roller 16 is mounted on the inner end of the telescopic pin 13, and the roller 16 is pressed against the double-shuttle disc 4.

[0029] When in use, the hanging climbing 8 descends and drives the hanging shaft 21 to follow. After the hanging climbing 8 tilts 90 degrees to one side, it cannot fall. The hanging shaft 21 drives the ratchet 7 to rotate 90 degrees, and the position of the main pawl 6 is formed into one. 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 degrees at the same time. The contact position of the roller 16 and 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 inward, away from the limit plate 10 of the bracket 3, and the hanging climbing 8 continues to rotate upward. In the open state; after the lifting climb 8 drops and tilts 90° to one side again, the hanging shaft 21 drives the ratchet 7 to rotate 90° again, and the main pawl 6 position is clamped again to form a whole, the lifting climb 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 of 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 coincide with the limit plate 10. The lifting climb 8 continues to rotate upward, and the sling is in a closed state, completing a working cycle.

[0030] The double shuttle-shaped disc 4 is provided with two groups of concave and convex positions, 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 is maintained at 90°.

[0031] Example 2

[0032] 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 provided at the middle position above the beam body 1, and a double-shuttle-shaped disc 4 is rotatably provided at the middle position inside the upper box body 2. Both sides of the double-shuttle-shaped disc 4 are provided with concave and convex positions, and a mounting ring 5 is provided at the middle position of one side of the double-shuttle-shaped disc 4. Both ends of the mounting ring 5 are elastically rotatably provided with pawls 6. 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 adapted to the pawls 6 are provided at equal angles on the outer side of the ratchet 7. A hanging climb 8 is connected to the outer side of the hanging shaft 21.

[0033] A lower box body 9 is located below the upper box body 2 and between the beam body 1. Elastic rod assemblies are located on both sides of the lower box body 9. The lower ends of the double shuttle-shaped discs 4 extend into the lower box body 9 and mate with the elastic rod assemblies. The brackets 3 extend through both sides of the beam body 1, and stop plates 10 are located on the inner sides of the brackets 3, mate with the elastic rod assemblies. The rotation of the suspension shaft 21 and the double shuttle-shaped discs 4 does not affect each other.

[0034] The double shuttle-shaped disc 4 is provided with two groups of concave and convex positions, 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 is maintained at 90°.

[0035] 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 reset by the pull of the tension spring 17.

[0036] 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.

[0037] 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.

[0038] The four corners of the upper box body 2 are all 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.

[0039] The double shuttle-shaped telescopic opening and closing device realizes the opening and closing of the spreader by quick opening and closing. The rotating lifting climb 8 is tilted to one side by more than 90° to drive the lifting shaft 21 to rotate, and the lifting 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 lifting climb 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 unlocking (open state) and limit locking (closed state) with the limit plate 10 of the bracket 3, meeting the design requirements of opening and closing of the spreader, convenient, safe and reliable, and the operation is visible and not easy to disengage.

[0040] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended 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 a concave position and a convex position, and a mounting ring (5) is provided at a middle position on one side of the double shuttle-shaped disc (4), both ends of the mounting ring (5) are elastically rotatably provided with pawls (6), the interior of the upper box body (2) is rotatably provided with a hanging shaft (21), 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 adapted to the pawls (6) are provided at equal angles on the outer side of the ratchet (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 end of the double shuttle-shaped disc (4) extends into the interior of the lower box body (9) and is adapted to the elastic rod assemblies. The bracket (3) respectively passes through both sides of the interior of the beam body (1), and a limit plate (10) adapted to the elastic rod assemblies is provided on the inner side of the bracket (3). 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) that pass through 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-shaped disc (4).

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

3. The 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).

4. 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).

5. The double-shuttle-shaped telescopic opening and closing device according to claim 4, 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).

6. The double-shuttle-shaped telescopic opening and closing device according to claim 5, 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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