Expansion type lifting appliance

Abstract

The utility model relates to the technical field of lifting appliances, in particular to an expansion type lifting appliance, which comprises a lifting rod, a lifting rod, a lifting rope, a lifting rope and a lifting rope, the first sliding sleeve is connected to the outer circle end of the hanging rod in a sliding mode, a pull ring is fixedly connected to the side end of the top of the first sliding sleeve, and a pull rope is connected to the pull ring; the second sliding sleeve is connected to the outer circle end of the hanging rod in a sliding mode and located between the first sliding sleeve and the supporting piece. The number of the supporting assemblies is three, the upper end, the middle end and the lower end of one side of each supporting assembly are each hinged to a supporting arm, the three supporting arms are hinged to the first sliding sleeve, the second sliding sleeve and the chassis correspondingly, and the three supporting assemblies are distributed relative to the suspender in an equal circumference mode; according to the utility model, hoisting can be carried out on the basis of not damaging the outer wall of the cylindrical object.

Description

Technical Field

[0001] The utility model relates to the technical field of slings, in particular to an expansion type sling. Background Art

[0002] Slings, as an indispensable key equipment in the industrial field, are mainly used for efficient and safe lifting, transportation and precise assembly of various objects. This lifting structure is designed to handle objects of different weights, shapes and materials, ensuring stability and safety during operation. Its core components include traditional hooks, wire ropes and chains. In terms of structural form, slings mostly adopt hook-type or clamp-type designs to accommodate objects of different shapes and sizes. Hook-type slings lift by hooking specific parts of the object, and are suitable for objects with suitable lifting points; while clamp-type slings firmly fix the object through an external clamping mechanism to ensure that the object does not slip or shake during the lifting process, and are particularly suitable for objects with irregular shapes or difficult to set lifting points;

[0003] However, this structure lacks targeted lifting when lifting special objects. For example, if conventional lifting equipment is used for cylindrical objects that require outer surface protection, it is easy to cause damage to the outer surface of the cylindrical object, causing defects on the outer surface, which is not conducive to protecting the hoisted object. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide an expandable sling to solve the above-mentioned problem.

[0005] Based on the above objectives, the present invention provides an expansion type sling, comprising:

[0006] A boom, the bottom of which is fixedly connected to a chassis, and the top of which is fixedly connected to a lifting ring;

[0007] a first sliding sleeve, slidably connected to the outer circular end of the boom, a pull ring fixedly connected to the top side end of the first sliding sleeve, and a pull rope connected to the pull ring;

[0008] a second sliding sleeve, slidably connected to the outer circular end of the boom and located between the first sliding sleeve and the support member;

[0009] There are three support assemblies, and each of the support assemblies is hinged with a support arm at the upper, middle and lower ends on one side. The three support arms are respectively hinged to the first sliding sleeve, the second sliding sleeve and the chassis. The three support assemblies are distributed circumferentially relative to the boom.

[0010] As an optional embodiment, each of the support components includes a support sleeve hinged to the support arm, an offset groove is provided in the support sleeve, a second tightening portion is provided in the offset groove and is vertically inclined from top to bottom and outward, a support block is slidably connected in the offset groove, and a first tightening portion is provided on the side of the support block close to the second tightening portion and is vertically inclined from top to bottom and outward, and an elastic structure is provided between the support block and the upper end of the bottom of the offset groove.

[0011] As an optional implementation, the elastic structure is a spring.

[0012] As an optional implementation, a rubber pad is fixedly connected to the outward side of the support block.

[0013] The beneficial effects of the present invention are as follows: when the present invention needs to lift a cylindrical object, the pull rope is pulled to make the first sliding sleeve slide on the lifting rod, thereby causing the support arm to pull the support assembly to contract, and when the device is placed in the cylindrical object to be lifted, the pull rope is released, and the first sliding sleeve slides downward on the lifting rod under gravity, causing the support assembly to expand and support the inner wall of the cylindrical object, and the lifting ring is pulled by the external lifting device to further expand and support the support assembly, so that the cylindrical object can be lifted without damaging the outer wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic diagram of the contracted state of an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the expansion and lifting installation state of the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the support assembly in a retracted state according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the expansion and lifting installation state of the support assembly according to the embodiment of the utility model;

[0019] Figure 5 This is a bottom view of an embodiment of the present utility model.

[0020] The following are marked in the figure:

[0021] 1. Boom; 2. Lifting ring; 3. Chassis; 4. Support sleeve; 5. First sliding sleeve; 6. Support arm; 7. Support block; 8. Pull rope; 9. Second sliding sleeve; 10. Offset slot; 11. First tightening part; 12. Second tightening part; 13. Spring; 14. Rubber pad. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0024] like Figure 1-Figure 5 As shown, an expansion type spreader comprises:

[0025] The bottom of the boom 1 is fixedly connected to the chassis 3, and the top of the boom 1 is fixedly connected to the lifting ring 2;

[0026] A first sliding sleeve 5 is slidably connected to the outer circular end of the boom 1. A pull ring is fixedly connected to the top side of the first sliding sleeve 5, and a pull rope 8 is connected to the pull ring;

[0027] A second sliding sleeve 9 is slidably connected to the outer circular end of the boom 1 and is located between the first sliding sleeve 5 and the support member;

[0028] There are three support assemblies, and each of the support assemblies is hinged with a support arm 6 at the upper, middle and lower ends on one side. The three support arms 6 are hinged to the first sliding sleeve 5, the second sliding sleeve 9 and the chassis 3 respectively. The three support assemblies are distributed circumferentially relative to the boom 1.

[0029] In this embodiment, when the cylindrical object needs to be lifted again, the pull rope 8 is pulled to make the first sliding sleeve 5 slide on the lifting rod 1, so that the support arm 6 pulls the support assembly to contract, and when the device is placed in the cylindrical object to be lifted, the pull rope 8 is released, and the first sliding sleeve 5 slides downward on the lifting rod 1 under gravity, causing the support assembly to expand and support the inner wall of the cylindrical object, and the external lifting device pulls the lifting ring 2 to further expand and support the support assembly, so that the cylindrical object can be lifted without damaging the outer wall.

[0030] As an optional implementation, Figure 2 、 3 As shown, each of the support components includes a support sleeve 4 hinged to the support arm 6, an offset groove 10 is provided in the support sleeve 4, a second tightening portion 12 is provided in the offset groove 10 and is vertically inclined from top to bottom and outward, a support block 7 is slidably connected in the offset groove 10, and a first tightening portion 11 is provided on the side of the support block 7 close to the second tightening portion 12 and is vertically inclined from top to bottom and outward, and an elastic structure is abutted against the upper end of the bottom of the support block 7 and the offset groove 10;

[0031] In this way, during lifting, the support block 7 contacts the cylindrical object and is subjected to a downward reaction force, and under the cooperation of the second tightening part 12 and the first tightening part 11, the support block 7 further expands to enhance the supporting effect of the support block 7. After being released from the lifting, the support block 7 is normally contracted in the offset groove 10 due to the resistance of the elastic structure, which facilitates the separation of the cylindrical object from the sling.

[0032] As an optional implementation, Figure 3 As shown, the elastic structure is a spring 13;

[0033] The elastic structure is preferably a spring 13 , and the elastic structure may also be a spring or other structure with telescopic reset performance.

[0034] As an optional implementation, Figure 3 As shown, the support block 7 is further fixedly connected to a rubber pad 14 on the outward side;

[0035] In this way, the rubber pad 14 can not only reduce the damage of the support block 7 to the inner wall of the cylindrical object, but also increase the friction between the support block 7 and the inner wall of the cylindrical object, thereby improving the effect of the sling.

[0036] Those skilled in the art will understand that the discussion of any of the above embodiments is merely illustrative and is not intended to limit the scope of the present invention to these examples. Within the spirit and principles of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and many other variations exist in the various aspects of the present invention described above, which are not provided in detail for the sake of clarity. Any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An expansion type spreader, characterized in that: include: A suspension rod (1) having a bottom fixedly connected to a chassis (3), and a top fixedly connected to a suspension ring (2); A first sliding sleeve (5) is slidably connected to the outer circular end of the boom (1); a pull ring is fixedly connected to the top side end of the first sliding sleeve (5); and a pull rope (8) is connected to the pull ring; A second sliding sleeve (9) is slidably connected to the outer circular end of the boom (1) and is located between the first sliding sleeve (5) and the chassis (3); There are three support assemblies, and each support assembly has a support arm (6) hinged at the upper, middle and lower ends on one side. The three support arms (6) are hinged to the first sliding sleeve (5), the second sliding sleeve (9) and the chassis (3) respectively. The three support assemblies are distributed in an equal circle relative to the boom (1).

2. An expandable spreader according to claim 1, characterized in that: Each of the support components comprises a support sleeve (4) hinged to the support arm (6), an offset groove (10) is provided in the support sleeve (4), a second tightening portion (12) vertically inclined from top to bottom and outward is provided in the offset groove (10), a support block (7) is slidably connected in the offset groove (10), a first tightening portion (11) vertically inclined from top to bottom and outward is provided on a side of the support block (7) close to the second tightening portion (12), and an elastic structure is provided to abut the upper end of the bottom of the support block (7) and the offset groove (10).

3. An expandable spreader according to claim 2, characterized in that: The elastic structure is a spring (13).

4. An expandable spreader according to claim 2, characterized in that: The support block (7) is also fixedly connected to a rubber pad (14) on the outward side.

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