Hoisting tool for heat treatment

Abstract

The utility model relates to a hoisting tool for heat treatment, and belongs to the technical field of hoisting tools. Comprising a main shaft, a fixedly-connected lifting ring is arranged at the top of the main shaft, a traction piece in sliding connection is arranged on the outer side wall of the main shaft, hinged connecting pieces are arranged on the two sides of the traction piece, hinged supporting pieces are arranged at the bottoms of the connecting pieces on the two sides respectively, and a hinged hole is formed in the bottom of the main shaft; the bottoms of the supporting pieces on the two sides are hinged to the main shaft at the hinge holes. According to the scheme, the opening width of the connecting piece and the supporting piece is adjusted by changing the position of the traction piece on the main shaft, so that clamping connection of the hoisting tool and the workpiece is achieved, and due to the fact that the hoisting tool is clamped with the inner side wall of the workpiece, in the heat treatment technological process, the tool is prevented from making contact with the outer surface of the workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting tooling and relates to a hoisting tooling used for heat treatment. Background Art

[0002] Heat treatment refers to a metal heat processing process that changes the chemical composition and structure of the surface or interior of a material by heating, heat preservation and cooling in a solid state to obtain the desired properties. For some metal materials with large volume and weight, it is difficult to carry and move them manually during the heat treatment process, so lifting equipment is needed to carry the workpiece.

[0003] However, there are still some shortcomings in the existing lifting fixtures. When designing the lifting fixtures, it is usually necessary to consider the structural characteristics such as stiffness and connection strength to ensure the stability of the workpiece during the heat treatment process. Therefore, there are high requirements for the clamping strength of the fixture to avoid the risk of tilting or falling off. The lifting fixture clamps the workpiece that needs to be heat treated through its clamp structure, and the clamp will contact the workpiece, which will affect the heat treatment process. Summary of the invention

[0004] The utility model aims at the problems existing in the prior art and proposes a hoisting tool for heat treatment. The technical problem to be solved by the utility model is: how to make the tool avoid contact with the workpiece while stably clamping the workpiece.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a lifting tool for heat treatment, comprising a main shaft, a fixed lifting ring is provided on the top of the main shaft, a slidingly connected traction member is provided on the outer side wall of the main shaft, hinged connecting members are provided on both sides of the traction member, and hinged support members are provided at the bottom of the connecting members on both sides, respectively, a hinge hole is provided at the bottom of the main shaft, and the bottoms of the support members on both sides are hingedly connected to the main shaft at the hinge holes.

[0006] In this solution, the traction member can move up and down along the main axis. When the traction member moves upward under the action of external force, the distance between the traction member and the hinge hole increases, which will drive the hinged connecting members and supporting members on both sides to shrink toward the center, so that the horizontal width of the lifting fixture is reduced, so that it can be inserted into the workpiece or taken out from the workpiece; when the traction member is not pulled up by external force, the traction member moves downward under the action of gravity, the distance between the traction member and the hinge hole is reduced, and the connecting members and supporting members open outward, so that the horizontal width of the lifting fixture is increased, so that it is clamped with the structure on the workpiece. The lifting device is connected to the lifting ring on the lifting fixture through the lifting rope, pulling the entire lifting fixture upward, thereby driving the workpiece clamped at the bottom of the lifting fixture to be lifted. In the above manner, since the lifting fixture is clamped with the inner wall of the workpiece, the contact between the fixture and the outer surface of the workpiece is avoided during the heat treatment process.

[0007] In the above-mentioned lifting fixture for heat treatment, a workpiece to be lifted is provided at the bottom of the lifting fixture, and the workpiece is a cylindrical structure with a hollow interior, and an opening is provided at the top of the workpiece, and a non-return portion is provided at the opening. Since the lifting fixture clamps the workpiece by opening the support member outward, the workpiece adopts a specific structure so that it can be grasped by the above-mentioned fixture.

[0008] In the above-mentioned lifting fixture for heat treatment, one end of the support member hinged with the connecting member extends outward, and a butt portion is provided on the end, the top of the butt portion butts against the non-return portion, and the side of the butt portion butts against the inner wall of the workpiece. The support member is clamped with the workpiece through the butt portion, and the butt portions on both sides butt against the non-return portion and the inner wall of the workpiece at the same time, which can ensure the stability of the fixture lifting the workpiece.

[0009] In the above-mentioned lifting fixture for heat treatment, a limiting column is provided on the main shaft, and the traction member is provided between the limiting column and the lifting ring. The limiting column is used to limit the sliding range of the traction member on the main shaft.

[0010] In the above-mentioned lifting tool for heat treatment, a traction rope is connected to the traction member, and the traction rope is used to pull the traction member so that the traction member moves on the outer side wall of the main shaft to control the opening or closing of the support member.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. In this solution, the position of the traction member on the main shaft is changed to adjust the width of the connection member and the support member to achieve the clamping connection between the lifting fixture and the workpiece. Since the lifting fixture is clamped with the inner wall of the workpiece, the contact between the fixture and the outer surface of the workpiece is avoided during the heat treatment process.

[0013] 2. In this solution, the support member is clamped with the workpiece through the abutment portion, and the abutment portions on both sides abut against the non-return portion and the inner wall of the workpiece at the same time, which can ensure the stability of the workpiece lifted by the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the lifting tooling of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model after the traction member moves upward;

[0016] Figure 3 The utility model is a schematic diagram of the structure of the lifting tool for lifting a workpiece.

[0017] In the figure, 1, main shaft; 1a, lifting ring; 1b, hinge hole; 1c, limit column; 2, traction member; 3, connecting member; 4, supporting member; 4a, abutment portion; 5, workpiece; 5a, opening; 5b, check portion. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] Example

[0020] like Figure 1 As shown, the lifting tool includes a main shaft 1, a fixed lifting ring 1a is provided on the top of the main shaft 1, a hinge hole 1b is provided on the bottom of the main shaft 1, a limiting column 1c is provided in the middle of the main shaft 1, a slidingly connected traction member 2 is provided on the outer wall of the main shaft 1, the traction member 2 is arranged between the lifting ring 1a and the limiting hole, hinged connecting members 3 are provided on both sides of the traction member 2, and hinged supporting members 4 are respectively provided at the bottom of the connecting members 3 on both sides, and the bottoms of the supporting members 4 on both sides are hingedly connected to the main shaft 1 at the hinge hole 1b.

[0021] like Figure 2 As shown, a workpiece 5 to be lifted is provided at the bottom of the lifting tooling, and the workpiece 5 is a cylindrical structure with a hollow interior. An opening 5a is provided at the top of the workpiece 5, and a check portion 5b is provided at the opening 5a. The traction member 2 is pulled by the traction rope and is located close to the lifting ring 1a. The connecting member 3 drives the support member 4 hinged at the bottom to retract inward, and the retracted tooling can extend into the workpiece 5 from the opening 5a.

[0022] like Figure 3 As shown, the traction member 2 moves downward under the action of gravity, and the support member 4 opens to both sides. One end of the support member 4 hinged to the connecting member 3 extends outward, and a supporting portion 4a is provided on the end. The upper part of the supporting portion 4a abuts against the non-return portion 5b, and the side of the supporting portion 4a abuts against the inner wall of the workpiece 5, so that the lifting tooling is clamped and connected to the workpiece 5.

[0023] The working principle of this scheme is as follows: Figure 1-3As shown, the lifting fixture is arranged right above the workpiece 5. Under the pulling action of the pulling rope, the connecting member 3 and the supporting member 4 shrink toward the center, so that the horizontal width of the lifting fixture is smaller than the diameter of the opening 5a, so that it can extend into the workpiece 5. After the pulling rope on the pulling member 2 is loosened, the pulling member 2 moves downward under the action of gravity, and the connecting member 3 and the supporting member 4 open outward, so that the supporting members 4 on both sides abut against the inner wall of the workpiece 5. By pulling up the lifting ring 1a through the lifting device, the entire lifting fixture is pulled upward, so that the abutting portion 4a on the supporting portion abuts against the bottom of the non-return portion 5b, thereby driving the workpiece 5 to be lifted. The lifted workpiece 5 can be conveniently carried, thereby improving the efficiency of heat treatment of the workpiece 5.

[0024] In this solution, the position of the traction member 2 on the main shaft 1 is changed to adjust the width of the connection member 3 and the support member 4, so as to realize the clamping connection between the lifting fixture and the workpiece 5. Since the lifting fixture is clamped with the inner wall of the workpiece 5, the contact between the fixture and the outer surface of the workpiece 5 is avoided during the heat treatment process. The support member 4 is clamped with the workpiece 5 through the abutment portion 4a, and the abutment portions 4a on both sides are abutted against the non-return portion 5b and the inner wall of the workpiece 5 at the same time, so that the workpiece 5 with a specific structure can be lifted, and the stability of the fixture when lifting the workpiece 5 can be guaranteed.

[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0026] Although this article uses more terms such as 1, spindle; 1a, lifting ring; 1b, hinge hole; 1c, limit column; 2, traction member; 3, connecting member; 4, supporting member; 4a, abutment; 5, workpiece; 5a, opening; 5b, non-return portion, etc., it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A lifting device for heat treatment, comprising a main shaft (1), wherein a lifting ring (1a) is fixedly provided at the top of the main shaft (1), characterized in that: A slidably connected traction member (2) is provided on the outer wall of the main shaft (1), hinged connecting members (3) are provided on both sides of the traction member (2), and hinged supporting members (4) are provided at the bottom of the connecting members (3) on both sides, respectively. A hinge hole (1b) is provided at the bottom of the main shaft (1), and the bottoms of the supporting members (4) on both sides are hingedly connected to the main shaft (1) at the hinge hole (1b).

2. A lifting tool for heat treatment according to claim 1, characterized in that: A workpiece (5) to be lifted is arranged at the bottom of the lifting tool. The workpiece (5) is a cylindrical structure with a hollow interior. An opening (5a) is arranged at the top of the workpiece (5). A non-return portion (5b) is arranged at the opening (5a).

3. A lifting tool for heat treatment according to claim 2, characterized in that: One end of the support member (4) hinged to the connecting member (3) extends outward, and a supporting portion (4a) is provided on the end, the upper portion of the supporting portion (4a) is in contact with the non-return portion (5b), and the side edge of the supporting portion (4a) is in contact with the inner wall of the workpiece (5).

4. A lifting tool for heat treatment according to claim 1, characterized in that: The main shaft (1) is provided with a limiting column (1c), and the traction member (2) is arranged between the limiting column (1c) and the hanging ring (1a).

5. The lifting tool for heat treatment according to claim 1, characterized in that: The traction member (2) is connected with a traction rope.

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