Three-jaw hoisting device

Abstract

The utility model relates to a three-jaw hoisting device which comprises a hoisting ring, a main hoisting shaft arranged at the lower end of the hoisting ring, a sliding seat sleeved in the middle of the main hoisting shaft, an elastic component arranged between the sliding seat and the hoisting ring, a fixed seat arranged at the lower end of the main hoisting shaft and fixedly connected with the main hoisting shaft, three sets of symmetrically-arranged connecting rod mechanisms are arranged in the circumferential direction of the sliding base and the fixed base, and each set of connecting rod mechanism is provided with a hook. The lifting device is simple in structure, convenient to operate and low in manufacturing cost, lifting can be carried out only by controlling the lifting device to descend into a hole of a to-be-lifted part, the hook can automatically hook a step of the to-be-lifted part under the action of weight extrusion of the lifting device and reset elastic force of the spring, and the bearing surface of the hook hooks the step of the to-be-lifted part, so that the lifting efficiency is greatly improved. And the compression spring continuously applies pressure to the sliding seat, so that the hook can be effectively prevented from loosening from the step of the part to be hung, and the working efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-jaw hoisting devices, and specifically relates to a three-jaw hoisting device. Background Technique

[0002] In the fields of industrial production and logistics transportation, etc., lifting tools are indispensable tools. At present, there are various types of lifting tools on the market. However, when lifting specific annular shell parts with steps (simply referred to as parts to be lifted), existing lifting tools often have some deficiencies.

[0003] For traditional two-jaw lifting tools, their grasping stability is relatively poor, and there is a risk of the item shaking or even falling off during the lifting process. Especially for items with irregular shapes or relatively smooth surfaces, their applicability is greatly limited.

[0004] For some more complex multi-jaw lifting tools, although the grasping stability is improved to a certain extent, their structures are often relatively complex, the manufacturing cost is high, and most existing lifting tools require manual connection of the lifting tool to the workpiece to be lifted, with cumbersome operations and being not conducive to improving work efficiency.

[0005] In order to solve the above problems, a three-jaw hoisting device is now proposed. Summary of the Invention

[0006] In order to solve the above problems, a three-jaw hoisting device is now proposed.

[0007] The specific solution of the utility model is: a three-jaw hoisting device, including: a lifting ring, a main lifting shaft is provided at the lower end of the lifting ring, a sliding seat is sleeved in the middle of the main lifting shaft, an elastic component is provided between the sliding seat and the lifting ring, the sliding seat is slidably connected to the main lifting shaft, a fixed seat is provided at the lower end of the main lifting shaft, and the fixed seat is fixedly connected to the main lifting shaft; three groups of symmetrically arranged link mechanisms are provided in the circumferential direction between the sliding seat and the fixed seat, and a hook is provided on each group of link mechanisms. The link mechanism includes:

[0008] The first link, the upper end of the first link is hinged to the sliding seat; the lower end of the first link is hinged to the middle of the second link, the lower end of the second link is hinged to the fixed seat, the upper end of the second link is hinged to the upper end of the hook, the middle of the hook is hinged to one end of the third link, the other end of the third link is hinged to the fixed seat, and the second link and the third link, together with the hook and the fixed seat, form a parallel four-force bar structure.

[0009] Further, the elastic component is a compression spring, the upper end of the compression spring abuts against the bottom of the lifting ring, and the lower end of the compression spring abuts against the upper end of the sliding seat.

[0010] Further, the hook is an L-shaped hook, and a bearing surface is provided inside the hook head of the hook. The bearing surface is used for direct contact with the workpiece to be hung. When the compression spring is in a natural state, the bearing surface of the hook is in a horizontal state.

[0011] Further, an annular retaining ring is provided on the upper part of the sliding seat. The annular retaining ring is integrally formed with the sliding seat, and the diameter of the annular retaining ring is larger than the diameter of the compression spring.

[0012] Further, the lifting ring is fixedly welded to the main lifting shaft, and a support beam is provided in the middle of the lifting ring.

[0013] The utility model has the following beneficial effects:

[0014] The structure of the utility model is simple, the operation is convenient, and the manufacturing cost is low. During work, only need to control the device to descend into the hole of the part to be lifted. Due to the extrusion of the device's own weight and the reset elastic force of the spring, the hook can automatically hook the step of the part to be lifted. The bearing surface of the hook hooks the step of the part to be lifted, and then the lifting can be carried out. Moreover, the compression spring continuously applies pressure to the sliding seat, which can effectively prevent the hook from loosening from the step of the part to be lifted. This device greatly improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the working state of the utility model;

[0016] Figure 2 is Figure 1 the cross-sectional schematic diagram of

[0017] Figure 3 is the front view schematic diagram of the utility model;

[0018] In the figure: 1, lifting ring; 101, support beam; 2, main lifting shaft; 3, sliding seat; 301, annular retaining ring; 4, compression spring; 5, link mechanism; 501, link one; 502, link two; 503, link three; 6, fixed seat; 7, part to be lifted; 701, hole; 8, hook; 801, hook head; 802, bearing surface. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In the manufacturing industry, equipment that requires angle adjustment is often involved, such as the nozzles of oxygen cutting machines, laser cutting machines, nozzles for automatic painting, and various equipment that requires angle adjustment. The angle adjustment mechanisms in the prior art are either expensive or complex in structure, and there has never been an angle adjustment device that can meet the adjustment requirements of users. To solve the above problems, a three-jaw lifting device is proposed herein. Embodiment

[0020] See Figures 1-3, A three-jaw hoisting device, comprising: a lifting ring 1, a main hoisting shaft 2 is provided at the lower end of the lifting ring 1, a sliding seat 3 is sleeved in the middle of the main hoisting shaft 2, an elastic member is provided between the sliding seat 3 and the lifting ring 1, the sliding seat 3 is slidably connected to the main hoisting shaft 2, a fixed seat 6 is provided at the lower end of the main hoisting shaft 2, and the fixed seat 6 is fixedly connected to the main hoisting shaft 2; three groups of symmetrically arranged link mechanisms 5 are provided in the circumferential direction between the sliding seat 3 and the fixed seat 6, and a hook 8 is provided on each group of link mechanisms 5. The link mechanism 5 includes:

[0021] The first link 501, the upper end of the first link 501 is hinged to the sliding seat 3; the lower end of the first link 501 is hinged to the middle of the second link 502, the lower end of the second link 502 is hinged to the fixed seat 6, the upper end of the second link 502 is hinged to the upper end of the hook 8, the middle of the hook 8 is hinged to one end of the third link 503, the other end of the third link 503 is hinged to the fixed seat 6, and the second link 502 and the third link 503 together with the hook 8 and the fixed seat 6 form a parallel four-force bar structure.

[0022] In this embodiment, the elastic member is a compression spring 4, the upper end of the compression spring 4 abuts against the bottom of the lifting ring 1, and the lower end of the compression spring 4 abuts against the upper end of the sliding seat 3.

[0023] In this embodiment, the hook 8 is an L-shaped hook 8, a bearing surface 802 is provided inside the hook head 801 of the hook 8, and the bearing surface 802 is used for direct contact with the workpiece to be hung. When the compression spring 4 is in a natural state, the bearing surface 802 of the hook 8 is in a horizontal state.

[0024] In this embodiment, an annular retaining ring 301 is provided on the upper part of the sliding seat 3, the annular retaining ring 301 is integrally formed with the sliding seat 3, and the diameter of the annular retaining ring 301 is larger than the diameter of the compression spring 4.

[0025] In this embodiment, the lifting ring 1 is fixedly welded to the main hoisting shaft 2, and a support beam 101 is provided in the middle of the lifting ring 1.

[0026] The utility model has the following beneficial effects:

[0027] The structure of the utility model is simple, the operation is convenient, and the manufacturing cost is low. During work, only need to control the device to descend into the hole 701 of the part 7 to be hoisted. Due to the extrusion of the weight of the device itself and the reset elastic force of the spring, the hook 8 can automatically hook the step of the part 7 to be hoisted. The bearing surface 802 of the hook 8 hooks the step of the part 7 to be hoisted, and then hoisting can be carried out. Moreover, the compression spring 4 continuously applies pressure to the sliding seat 3, which can effectively prevent the hook 8 from loosening from the step of the part 7 to be hoisted. This device greatly improves the work efficiency.

Claims

1. A three-claw lifting device, comprising: A lifting ring, wherein a main lifting shaft is arranged at the lower end of the lifting ring, characterized in that: a sliding seat is sleeved in the middle of the main lifting shaft, an elastic component is arranged between the sliding seat and the lifting ring, the sliding seat is slidably connected to the main lifting shaft, a fixed seat is arranged at the lower end of the main lifting shaft, and the fixed seat is fixedly connected to the main lifting shaft; three groups of symmetrically arranged connecting rod mechanisms are arranged in the circumferential direction of the sliding seat and the fixed seat, each group of the connecting rod mechanisms is provided with a hook, and the connecting rod mechanism comprises: Connecting rod one, the upper end of connecting rod one is hinged to the sliding seat; the lower end of connecting rod is hinged to the middle part of connecting rod two, the lower end of connecting rod two is hinged to the fixed seat, the upper end of connecting rod two is hinged to the upper end of the hook, the middle part of the hook is hinged to one end of connecting rod three, the other end of connecting rod three is hinged to the fixed seat, and connecting rod two and connecting rod three form a parallel four-force bar structure with the hook and the fixed seat.

2. A three-claw lifting device according to claim 1, characterized in that: The elastic component is a compression spring, the upper end of the compression spring abuts against the bottom of the hanging ring, and the lower end of the compression spring abuts against the upper end of the sliding seat.

3. A three-claw lifting device according to claim 2, characterized in that: The hook is an L-shaped hook, and a bearing surface is provided on the inner side of the hook head of the hook. The bearing surface is used to directly contact the workpiece to be hung. When the compression spring is in a natural state, the bearing surface of the hook is in a horizontal state.

4. A three-claw lifting device according to claim 3, characterized in that: An annular retaining ring is provided on the upper part of the sliding seat. The annular retaining ring is integrally formed with the sliding seat, and the diameter of the annular retaining ring is greater than the diameter of the compression spring.

5. A three-claw lifting device according to claim 4, characterized in that: The lifting ring is welded and fixed to the main lifting shaft, and a supporting beam is provided in the middle of the lifting ring.

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