Mechanical safety protection lifting appliance for crane

Abstract

The utility model discloses a mechanical safety protection lifting appliance for a crane, which comprises two opposite side plates, a lifting hook is fixed at the bottom end between the two side plates, collision protection components are arranged at the tops of the two side plates, a rubber block is fixed at the bottom of the lifting hook, and the shape of the rubber block is matched with that of the lifting hook. An arc-shaped groove is formed in the inner wall of the bottom of the lifting hook, and a barb is rotationally connected into the arc-shaped groove through a rotating shaft. When the lifting hook is used for lifting an object, a lifting rope used for hanging the object can press one end of the barb downwards under the action of gravity and enables the other end of the barb to be tilted, so that the lifting rope can be limited in a semi-closed ring cavity formed by the barb and the lifting hook and is prevented from being unhooked, and when the lifting hook collides with the object to be lifted, a rubber block at the bottom of the lifting hook can buffer collision, so that the object to be lifted is prevented from falling off. The air bag is arranged in the rubber block, when the impact force is large, the pressure is further buffered by extruding the air bag, the lifting hook is folded and can be protected through the collision protection assembly, and impact abrasion is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a mechanical safety protection sling for cranes. Background Art

[0002] A crane is a multi-action lifting machine that can lift heavy objects vertically and carry them horizontally within a certain range. It is also called an overhead crane, an overhead crane, or a crane. Crane slings are devices used to lift heavy objects in lifting and hoisting operations. The most commonly used slings are hooks, and others include lifting rings, lifting suction cups, clamps, and lifting beams. Lifting suction cups, clamps, and lifting beams can be used as special slings on cranes for a long time, or as replaceable auxiliary slings hung on hooks for temporary use. They are often used in warehouses and yards with multiple cargo types to improve operating efficiency.

[0003] Crane hoisting equipment needs to move up and down when in use. When moving downward, the bottom of the hook may collide with the object to be lifted, and when moving upward, it may collide with the top beam or hanger, both of which will cause wear of the hoisting equipment. At the same time, when the hook is hanging an object, if the hook tilts, it may cause the hung object to become unhooked, posing a safety hazard. Utility Model Content

[0004] The purpose of the utility model is to provide a crane mechanical safety protection sling to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A crane mechanical safety protection sling comprises two side plates arranged opposite to each other, a hook is fixed at the bottom end between the two side plates, a collision protection component is arranged on the top of the two side plates, a rubber block is fixed at the bottom of the hook, the shape of the rubber block is matched with the appearance of the hook, an arc groove is opened on the inner wall of the bottom of the hook, a barb is connected to the arc groove by rotation of a rotating shaft, and the barb is arc-shaped and a protrusion is arranged on one end of the raised end.

[0007] As a further solution of the utility model: the collision protection assembly includes a protection block, the shape of the protection block is adapted to the appearance of the side panel and the protection block is welded and fixed to the top of the side panel, and a rubber sleeve is sleeved and fixed to the upper end of the protection block.

[0008] As a further solution of the utility model: a groove is provided on the top of the protective block, and a plurality of hydraulic rods are fixed in the groove at equal intervals. A sealing plate is slidably connected in the opening of the groove, one end of the plurality of hydraulic rods slides through the sealing plate, and the top ends of the plurality of hydraulic rods are fixedly connected to the rubber sleeve, and a second return spring is sleeved on the outside of the plurality of hydraulic rods.

[0009] As a further solution of the utility model: the top end between the two side plates is rotatably connected with a pulley, and a traction rope is wound on the pulley.

[0010] As a further solution of the utility model: an airbag is embedded in the rubber block, and air holes are opened on the inner wall of the rubber block corresponding to the two sides of the airbag, and the two air holes are connected to the inside of the airbag.

[0011] As a further solution of the utility model: a plurality of first return springs are fixed inside the airbag, and upper and lower ends of the plurality of first return springs are fixedly connected to the upper and lower inner walls of the airbag respectively.

[0012] As a further solution of the present invention: the upper and lower ends of the second return spring are fixedly connected to the upper and lower ends of the hydraulic rod respectively.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. In the utility model, when the hook is lifting an object, the rope used to hang the object will press down one end of the hook under the action of gravity and make the other end tilt up, so that the rope can be restricted in the semi-closed loop cavity formed by the hook and the hook, preventing the rope from being unhooked, and lifting the object is safer;

[0015] 2. In the utility model, when the hook collides with the object to be hoisted, the rubber block at the bottom can buffer the impact. At the same time, the rubber block is made of a relatively soft material, which can avoid abrasion of the object to be hoisted during the impact. An air bag is arranged inside the rubber block. When the impact force is large, the pressure is buffered by squeezing the air bag to avoid the rubber block being crushed. An air hole and a reset spring are arranged inside the air bag. When no force is applied, the air bag and the rubber block are restored.

[0016] 3. In the utility model, when the hook is folded, there is a risk of colliding with the hanger under the action of inertia. At this time, it can be protected by the collision protection component. Specifically, when the side plate is hit, the pressure is first buffered by the rubber sleeve. The rubber sleeve is made of soft material to avoid impact and wear of the side plate. When the rubber sleeve is compressed, it deforms inward and squeezes the hydraulic rod. The pressure is buffered again by the hydraulic rod to further protect the side plate. When the side plate is not squeezed, the second reset spring resets and drives the hydraulic rod and the rubber sleeve to recover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is an enlarged view of point A in the utility model.

[0020] Figure 3 It is a top view of the internal structure of the rubber block in the utility model.

[0021] Figure 4 It is an expanded view of the collision protection component in the utility model.

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0023] Notes on figure numbers: 1-side plate, 2-pulley, 3-traction rope, 4-hook, 5-collision protection assembly, 51-protection block, 52-rubber sleeve, 53-slot, 54-sealing plate, 55-hydraulic rod, 56-second return spring, 6-arc groove, 7-rubber block, 8-barb, 9-rotating shaft, 10-airbag, 11-air hole, 12-first return spring. DETAILED DESCRIPTION

[0024] The following embodiments will be combined with the accompanying drawings to describe the utility model in detail. In the drawings or descriptions, similar or identical parts use the same reference numerals, and in actual applications, the shape, thickness or height of each component can be enlarged or reduced. The various embodiments listed in the utility model are only used to illustrate the utility model, and are not used to limit the scope of the utility model. Any obvious modifications or changes made to the utility model do not depart from the spirit and scope of the utility model.

[0025] Example 1

[0026] See also Figures 1 to 3 In the embodiment of the utility model, a crane mechanical safety protection sling comprises two side plates 1 arranged opposite to each other, a pulley 2 is rotatably connected to the top of the two side plates 1, a traction rope 3 is wound on the pulley 2, a hook 4 is fixed to the bottom end between the two side plates 1, and a collision protection component 5 is arranged on the top of the two side plates 1;

[0027] A rubber block 7 is fixed at the bottom of the hook 4. The shape of the rubber block 7 is adapted to the shape of the hook 4. An arc groove 6 is provided on the inner wall of the bottom of the hook 4. A barb 8 is rotatably connected to the arc groove 6 through a rotating shaft 9. The barb 8 is arc-shaped and has a protrusion at one end of the tilted end. When the hook 4 is lifting an object, the rope used to hang the object presses down one end of the barb 8 and tilts the other end, restricting the rope in a semi-closed loop cavity formed by the barb 8 and the hook 4 to prevent the rope from being unhooked.

[0028] An airbag 10 is embedded in the rubber block 7. Air holes 11 are provided on the inner wall of the rubber block 7 corresponding to the two sides of the airbag 10. The two air holes 11 are connected to the inside of the airbag 10. A plurality of first return springs 12 are fixed inside the airbag 10. The upper and lower ends of the plurality of first return springs 12 are respectively fixedly connected to the upper and lower inner walls of the airbag 10. When the hook 4 collides with the object to be lifted, the rubber block 7 at its bottom can buffer the impact. At the same time, the rubber block is made of a soft material to avoid wear on the object to be lifted during the impact. The airbag 10 is arranged inside the rubber block 7. When the impact force is large, the pressure is buffered by squeezing the airbag to avoid the rubber block being crushed. Air holes and return springs are arranged in the airbag. When there is no force, the airbag and the rubber block recover.

[0029] Example 2

[0030] See also Figures 4-5 On the basis of Example 1, the collision protection component 5 includes a protection block 51, the shape of the protection block 51 is adapted to the appearance of the side panel 1 and the protection block 51 is welded and fixed to the top of the side panel 1, a slot 53 is provided on the top of the protection block 51, a plurality of hydraulic rods 55 are fixed at equal intervals in the slot 53, a sealing plate 54 is slidably connected in the opening of the slot 53, a rubber sleeve 52 is sleeved and fixed on the upper end of the protection block 51, one end of the plurality of hydraulic rods 55 slides through the sealing plate 54, and the top ends of the plurality of hydraulic rods 55 are fixedly connected to the rubber sleeve 52, and a second return spring 56 is sleeved and fixed on the outside of the plurality of hydraulic rods 55, and the upper and lower ends of the second return spring 56 are respectively fixedly connected to the upper and lower ends of the hydraulic rod 55.

[0031] When the hook is folded, there is a risk of colliding with the hanger under the action of inertia. At this time, it can be protected by the collision protection component 5. Specifically, when the side panel 1 is hit, the pressure is first buffered by the rubber sleeve 52. The rubber sleeve is made of soft material to avoid impact and wear of the side panel. When the rubber sleeve is compressed, it deforms inward and squeezes the hydraulic rod 55. The hydraulic rod 55 buffers the pressure again to further protect the side panel. When the side panel is not squeezed, the second reset spring 56 resets and drives the hydraulic rod and the rubber sleeve to recover.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A crane mechanical safety protection sling, comprising two side plates (1) arranged opposite to each other, a hook (4) being fixed at the bottom end between the two side plates (1), characterized in that: The tops of the two side panels (1) are both provided with collision protection components (5), the bottom of the hook (4) is fixed with a rubber block (7), the shape of the rubber block (7) is adapted to the outer shape of the hook (4), an arc groove (6) is provided on the inner wall of the bottom of the hook (4), a barb (8) is rotatably connected in the arc groove (6) via a rotating shaft (9), and the barb (8) is arc-shaped and has a protrusion on one end of the raised end.

2. The crane mechanical safety protection sling according to claim 1 is characterized in that: The collision protection assembly (5) comprises a protection block (51), the shape of the protection block (51) being compatible with the outer shape of the side plate (1) and the protection block (51) being welded and fixed to the top of the side plate (1), and a rubber sleeve (52) being sleeved and fixed to the upper end of the protection block (51).

3. The crane mechanical safety protection sling according to claim 2 is characterized in that: A slot (53) is provided at the top of the protection block (51), a plurality of hydraulic rods (55) are fixed at equal intervals in the slot (53), a sealing plate (54) is slidably connected in the opening of the slot (53), one end of the plurality of hydraulic rods (55) slides through the sealing plate (54), and the top ends of the plurality of hydraulic rods (55) are fixedly connected to the rubber sleeve (52), and the outsides of the plurality of hydraulic rods (55) are sleeved with a second return spring (56).

4. The crane mechanical safety protection sling according to claim 1 or 3, characterized in that: A pulley (2) is rotatably connected to the top end between the two side plates (1), and a traction rope (3) is wound around the pulley (2).

5. The crane mechanical safety protection sling according to claim 4 is characterized in that: An airbag (10) is embedded in the rubber block (7), and air holes (11) are provided on the inner wall of the rubber block (7) at two sides corresponding to the airbag (10), and the two air holes (11) are communicated with the interior of the airbag (10).

6. The crane mechanical safety protection sling according to claim 5 is characterized in that: A plurality of first return springs (12) are fixed inside the airbag (10), and the upper and lower ends of the plurality of first return springs (12) are respectively fixedly connected to the upper and lower inner walls of the airbag (10).

7. The crane mechanical safety protection sling according to claim 3 is characterized in that: The upper and lower ends of the second return spring (56) are fixedly connected to the upper and lower ends of the hydraulic rod (55) respectively.

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