Inner support lifting appliance capable of automatically loosening and tightening

Abstract

The utility model discloses an inner support lifting appliance capable of automatically loosening and tightening, and relates to the technical field of lifting appliances, in particular to an inner support lifting appliance capable of automatically loosening and tightening, which comprises a lifting ring, a pull rod is connected below the lifting ring, a top hinge seat is fixedly connected on the outer surface of the pull rod close to the lifting ring, and a lifting hook is hinged below the top hinge seat. An inner support lifting appliance assembly capable of sliding up and down is sleeved below the pull rod, the inner support lifting appliance assembly comprises an upper sliding sleeve and a lower sliding sleeve, a lifting appliance upper hinge seat is sleeved below the upper sliding sleeve, and a lifting appliance lower hinge seat is sleeved on the outer surface of the lower sliding sleeve. According to the inner support lifting appliance capable of automatically tightening and loosening, the pull rod, the lifting hook, the inner support lifting appliance assembly and the check ring are arranged in a matched mode, so that the inner support lifting appliance capable of automatically tightening and loosening has the effect of automatically tightening and fixing a product through a simple pure mechanical structure; therefore, the inner support lifting appliance capable of automatically loosening and tightening has the effect of automatically unfastening and releasing a product through a simple pure mechanical structure.

Description

Technical Field

[0001] The utility model relates to the technical field of slings, in particular to an automatically tightening and loosening internal support sling. Background Art

[0002] Traditional internal support slings cannot achieve purely mechanical automatic tightening and loosening functions. When loosening the internal support slings, manpower or electrical components are usually required. Otherwise, the tightened slings and objects cannot be released. When expansion and contraction are performed by electrical components, the production cost will increase. When expansion and contraction are performed manually, high labor costs are required, the operation is complicated and inefficient. At the same time, there are potential safety hazards when people and objects are too close. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the present invention provides an automatically tightening and loosening internal support hanger, which solves the problems raised in the above-mentioned background technology.

[0005] (2) Technical solution

[0006] To achieve the above objectives, the utility model is implemented through the following technical solutions: an automatically loosening and tightening internal support sling, comprising a lifting ring, a pull rod is connected to the bottom of the lifting ring, and the pull rod is fixedly connected to a top hinged seat near the outer surface of the lifting ring, and a hook is hinged below the top hinged seat, and an internal support sling assembly that can slide up and down is sleeved below the pull rod, and the internal support sling assembly comprises an upper sliding sleeve and a lower sliding sleeve, and the upper sliding sleeve is sleeved with the upper hinged seat of the sling below, and the outer surface of the lower sleeve is sleeved with the lower hinged seat of the sling, and an expansion and contraction strip is hinged between the lower hinged seat of the sling and the upper hinged seat of the sling, and a pressure plate fixedly connected to the upper hinged seat of the sling is sleeved below the upper sliding sleeve, and the upper sliding sleeve is located above the pressure plate and sleeved with a lifting block fixed to it, and the upper sliding sleeve is located above the lifting block and sleeved with a release block that can slide up and down, and a retaining ring is provided at the lower end of the pull rod.

[0007] Preferably, the hook is C-shaped and the upper end is hinged to the top hinge seat. When the hook naturally droops under the action of gravity, the lower end can touch the outer surface of the pull rod. There are three hooks and they are evenly distributed below the top hinge seat.

[0008] Preferably, the length of the pull rod is greater than the sum of the length of the hook and the length of the inner support hanger assembly, so that the inner support hanger assembly can slide up and down under the hook.

[0009] Preferably, the upper end of the release block is provided with a downward inclined surface, the lower end of the lifting block is provided with an upward inclined surface, and the outer bottom surface of the lower end of the hook is provided with an upward inclined surface. When the release block and the outer bottom of the hook move toward each other and collide, the lower end of the hook can be easily opened due to the guiding effect of the two inclined surfaces. When the lifting block and the inner bottom of the hook move toward each other and collide, the lower end of the hook requires a certain amount of pulling force to be opened because there is only one inclined surface to guide.

[0010] Preferably, after the release block slides upward and separates from the lifting block, the lower end of the hook can be buckled onto the lower end surface of the release block. The lower end surface of the release block is flat and will not push the hook outward, so that the hook can lift the internal support sling assembly through the release block without sliding under the pull rod, but at this time the lower sleeve will slide downward under the action of gravity.

[0011] Preferably, the lower hinge seat of the sling is provided with two hinge points and is connected to the expansion and contraction strips through two connecting rods. The number of expansion and contraction strips is three and is evenly distributed around the inner support sling assembly. The lower hinge seat of the sling, the expansion and contraction strips and the two connecting rods form a parallelogram. When the distance between the upper sliding sleeve and the lower sliding sleeve becomes larger, the parallelogram shrinks inward, and when the distance between the upper sliding sleeve and the lower sliding sleeve becomes smaller, the parallelogram expands outward.

[0012] The utility model provides an automatically tightening and loosening internal support sling, which has the following beneficial effects:

[0013] 1. The automatic tightening and loosening internal support sling, through the coordinated arrangement of the pull rod, hook, internal support sling assembly and retaining ring, enables the automatic tightening and loosening internal support sling to achieve the effect of automatically tightening and fixing the product through a simple purely mechanical structure. When it is necessary to lift the object, the hook is first moved down to the bottom of the lifting block for lifting through the lifting ring, and then the pull rod and the hook are moved upward. The lifting block has an inclined surface to separate the hook from the release block. At the same time, the retaining ring at the bottom of the pull rod contacts the hinged seat under the sling. The deadweight of the sling and the parallelogram linkage mechanism are used to increase the effective radius of the parallelogram mechanism and then the expansion and contraction strip contacts the inner wall, thereby tightening the tubular inner wall to achieve the purpose of lifting the object.

[0014] 2. The automatic tightening and loosening internal support spreader, through the coordinated arrangement of the pull rod, the hook and the internal support spreader assembly, enables the automatic tightening and loosening internal support spreader to achieve the effect of automatically loosening and releasing the product through a simple purely mechanical structure. When the spreader and the product are separated, the lifting ring and the hook move down to below the release block, and the lifting operation is performed again to combine the hook with the release block. The hook drives the release block and the outer edge of the parallelogram mechanism to move upward, and at the same time the effective radius of the parallelogram mechanism becomes smaller, thereby separating the spreader from the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the main view of the utility model;

[0016] Figure 2 It is a schematic structural diagram of a cross-sectional view of the present utility model;

[0017] Figure 3 It is a structural schematic diagram of a three-dimensional view of the present invention.

[0018] In the figure: 1. lifting ring; 2. pull rod; 3. top hinge seat; 4. hook; 5. internal support sling assembly; 501. upper sliding sleeve; 502. lower sliding sleeve; 503. upper hinge seat of sling; 504. lower hinge seat of sling; 505. expansion and contraction strip; 506. pressure plate; 507. lifting block; 508. release block; 6. retaining ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figures 1 to 3The utility model provides a technical solution: an automatic loosening and tightening internal support sling, comprising a lifting ring 1, the lifting ring 1 is used to lift the internal support sling, a pull rod 2 is connected below the lifting ring 1, the pull rod 2 is fixedly connected to a top hinged seat 3 near the outer surface of the lifting ring 1, a hook 4 is hinged below the top hinged seat 3, the hook 4 is C-shaped and the upper end is hinged to the top hinged seat 3, when the hook 4 naturally droops under the action of gravity, the lower end can touch the outer surface of the pull rod 2, the number of hooks 4 is three and they are evenly distributed below the top hinged seat 3, an internal support sling assembly 5 that can slide up and down is sleeved below the pull rod 2, the length of the pull rod 2 is greater than the sum of the length of the hook 4 and the length of the internal support sling assembly 5, so that the internal support sling assembly 5 can be lifted The hook 4 slides up and down below, and the internal support sling assembly 5 includes an upper sliding sleeve 501 and a lower sliding sleeve 502. The upper sliding sleeve 501 is sleeved with an upper hinge seat 503 of the sling below, and the outer surface of the lower sliding sleeve 502 is sleeved with a lower hinge seat 504 of the sling. An expansion strip 505 is hinged between the lower hinge seat 504 of the sling and the upper hinge seat 503 of the sling. A pressure plate 506 fixedly connected to the upper hinge seat 503 of the sling is sleeved below the upper sliding sleeve 501. The upper sliding sleeve 501 is located above the pressure plate 506 and is sleeved with a lifting block 507 fixed thereto. The upper sliding sleeve 501 is located above the lifting block 507 and is sleeved with a release block 508 which can slide up and down. The upper end of the release block 508 is provided with a downward inclined surface, and the lower end of the lifting block 507 is provided with an upward inclined surface. The lower end surface of the release block 508 is flat and will not stretch the hook 4 outwards, so that the hook 4 can lift the inner support sling assembly 5 through the release block 508 without sliding under the pull rod 2, but at this time the lower sleeve 502 will slide downward under the action of gravity, and the sling lower The hinged seat 504 is provided with two hinge points and is connected to the expansion and contraction strips 505 through two connecting rods. There are three expansion and contraction strips 505 evenly distributed around the inner support sling assembly 5. The hinged seat 504 below the sling, the expansion and contraction strips 505 and the two connecting rods form a parallelogram. When the distance between the upper sliding sleeve 501 and the lower sliding sleeve 502 becomes larger, the parallelogram shrinks inward, and when the distance between the upper sliding sleeve 501 and the lower sliding sleeve 502 becomes smaller, the parallelogram expands outward. A retaining ring 6 is provided at the lower end of the pull rod 2. The retaining ring 6 can prevent the inner support sling assembly 5 from sliding out of the pull rod 2. When the expansion and contraction strips 505 shrink, the inner support sling assembly 5 can be easily inserted into the interior of the tubular object. When the expansion and contraction strips 505 expand, they can contact the inner wall of the tubular object and lift it up through friction.

[0021] When in use, first lift the inner support sling through the lifting ring 1, then push the inner support sling assembly 5 upwards and fix the upper sliding sleeve 501 of the inner support sling assembly 5 through the release block 508 through the hook 4, so that the lower sliding sleeve 502 can slide down along the pull rod 2 under the action of gravity. The distance between the upper and lower sliding sleeves 502 is enlarged to allow the expansion strip 505 to shrink so as to be inserted into the hole. When the pull rod 2 continues to penetrate into the hole, the inner support sling assembly 5 is first stopped by the pressure plate 506, and the pull rod 2 continues to descend and then the lower bottom surface of the hook 4 collides with the lifting block 507, and then automatically stretches across the lifting block 507 through the inclined surface of the lower bottom surface of the hook 4. The pull rod 2 stops descending and rises, and the inner support sling assembly 5 is still inserted into the hole due to the action of gravity. The hook 4 continues to rise and the upper bottom surface collides with the inclined surface of the bottom surface of the lifting block 507. The hook 4 automatically stretches and crosses the lifting block 507 through the inclined surface. The lifting block 507 and the release block 508, and the pull rod 2 continues to rise until the retaining ring 6 touches the lower sleeve 502 and lifts the lower sleeve 502 upward. As the lower sleeve 502 is lifted, the expansion strip 505 opens outward and touches the hole wall to generate friction. At this time, the greater the upward pulling force of the pull rod 2, the greater the friction, and the product is lifted. In this process, the product can be automatically tightened and fixed only through a simple pure mechanical structure, that is, no electrical control or manual operation is required. When the sling and the product are separated, the lifting ring 1 and the hook 4 move down to the bottom of the release block 508, and the lifting operation is performed again to combine the hook 4 with the release block 508. The hook 4 drives the release block 508 and the outer edge of the parallelogram mechanism to move upward. At the same time, the effective radius of the parallelogram mechanism becomes smaller, so that the sling is separated from the product. Since workers do not need to be nearby when putting down the product, personal danger is avoided.

[0022] To sum up, when the automatic elastic internal support sling needs to lift the object, the hook 4 is first moved down to the bottom of the lifting block 507 and lifted through the lifting ring 1, and then the pull rod 2 and the hook 4 move upward. The lifting block 507 has an inclined surface to separate the hook 4 from the release block 508. At the same time, the retaining ring 6 at the bottom of the pull rod 2 contacts the hinged seat 504 under the sling, and the sling's own weight and the parallelogram linkage mechanism are used to increase the effective radius of the parallelogram mechanism and then the expansion and contraction bar 505 contacts the inner wall, thereby tightening the tubular inner wall to achieve the purpose of lifting the object. When the sling and the product are separated, the lifting ring 1 and the hook 4 move down to the bottom of the release block 508, and the lifting operation is performed again to combine the hook 4 with the release block 508. The hook 4 drives the release block 508 and the outer edge of the parallelogram mechanism to move upward. At the same time, the effective radius of the parallelogram mechanism becomes smaller, thereby separating the sling from the product.

[0023] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic tightening and loosening internal support sling, comprising a lifting ring (1), characterized in that: The lower part of the lifting ring (1) is connected to a pull rod (2), and the outer surface of the pull rod (2) close to the lifting ring (1) is fixedly connected to a top hinge seat (3), and the lower part of the top hinge seat (3) is hinged to a hook (4), and the lower part of the pull rod (2) is sleeved with an inner support sling assembly (5) that can slide up and down, and the inner support sling assembly (5) includes an upper sliding sleeve (501) and a lower sliding sleeve (502), and the lower part of the upper sliding sleeve (501) is sleeved with an upper hinge seat (503) of the sling, and the outer surface of the lower sliding sleeve (502) is sleeved with a lower hinge seat (504) of the sling. 04), an expansion strip (505) is hinged between the lower hinge seat (504) of the sling and the upper hinge seat (503) of the sling, a pressure plate (506) fixedly connected to the upper hinge seat (503) of the sling is sleeved below the upper sliding sleeve (501), the upper sliding sleeve (501) is located above the pressure plate (506) and is sleeved with a lifting block (507) fixed thereto, the upper sliding sleeve (501) is located above the lifting block (507) and is sleeved with a release block (508) that can slide up and down, and a retaining ring (6) is provided at the lower end of the pull rod (2).

2. The automatic tightening and loosening internal support hanger according to claim 1, characterized in that: The hook (4) is C-shaped and its upper end is hinged to the top hinge seat (3). When the hook (4) naturally droops under the action of gravity, its lower end can touch the outer surface of the pull rod (2). The number of hooks (4) is three and they are evenly distributed below the top hinge seat (3).

3. The automatic tightening and loosening internal support hanger according to claim 1, characterized in that: The length of the pull rod (2) is greater than the sum of the length of the hook (4) and the length of the inner support sling assembly (5), so that the inner support sling assembly (5) can slide up and down below the hook (4).

4. The automatic tightening and loosening internal support hanger according to claim 1, characterized in that: The upper end of the release block (508) is provided with a downward inclined surface, the lower end of the lifting block (507) is provided with an upward inclined surface, and the outer bottom surface of the lower end of the hook (4) is provided with an upward inclined surface. When the release block (508) and the outer bottom of the hook (4) move toward each other and collide, the lower end of the hook (4) can be easily opened due to the guiding effect of the two inclined surfaces. When the lifting block (507) and the inner bottom of the hook (4) move toward each other and collide, since there is only one inclined surface to guide, the lower end of the hook (4) requires a certain pulling force to be opened.

5. The automatic tightening and loosening internal support hanger according to claim 1, characterized in that: After the release block (508) slides upward and separates from the lifting block (507), the lower end of the hook (4) can be buckled onto the lower end surface of the release block (508). The lower end surface of the release block (508) is a plane and will not push the hook (4) outward, so that the hook (4) can lift the inner support sling assembly (5) through the release block (508) without sliding under the pull rod (2). However, at this time, the lower sleeve (502) will slide downward under the action of gravity.

6. The automatic tightening and loosening internal support hanger according to claim 1, characterized in that: The lower hinge seat (504) of the sling is provided with two hinge points and is connected to the expansion and contraction strips (505) through two connecting rods. The number of the expansion and contraction strips (505) is three and is evenly distributed around the inner support sling assembly (5). The lower hinge seat (504) of the sling, the expansion and contraction strips (505) and the two connecting rods form a parallelogram. When the distance between the upper sliding sleeve (501) and the lower sliding sleeve (502) increases, the parallelogram shrinks inward, and when the distance between the upper sliding sleeve (501) and the lower sliding sleeve (502) decreases, the parallelogram expands outward.

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