Anti-deformation clamp suitable for heat treatment of D-shaped shackle

Abstract

The utility model discloses an anti-deformation clamp suitable for D-shaped shackle heat treatment, which comprises a D-shaped shackle body and a clamp body, adjustable threaded sections are symmetrically arranged at two ends of the clamp body, limit nuts are arranged on the adjustable threaded sections, and the D-shaped shackle body is limited by matching the limit nuts with the adjustable threaded sections. The heat treatment clamp is simple in structure and reasonable in design, the cylindrical clamp body design is adopted, the clamp body is installed in a shackle transverse pin hole before heat treatment, the two ends of the clamp body are locked through the fixing nuts, it is guaranteed that the inner gear size of the shackle after heat treatment cannot exceed the dimensional tolerance requirement, and the product quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of shackle processing, in particular to an anti-deformation clamp suitable for heat treatment of a D-shaped shackle. Background Art

[0002] D-type shackles are widely used on ships or mooring platforms, and have the technical characteristics of high strength and toughness. D-type shackles have very high performance and size requirements for their inner gear, chain diameter and ball head, otherwise it will affect the assembly of the chain and other accessories. During the heat treatment process, the inner gear is the part that is most likely to deform. Since the D-type shackle structure is U-shaped, it is easy to expand and deform during the heat treatment process. Figure 4 As shown, the inner size is too large and does not meet the product size requirements. Therefore, it is necessary to design a special anti-deformation fixture for D-type shackles to ensure that the inner size of the shackle after heat treatment does not exceed the dimensional tolerance requirements. Summary of the Invention

[0003] The utility model aims to solve the above technical problems and provide an anti-deformation clamp suitable for heat treatment of D-type shackles.

[0004] In order to achieve the above technical objectives and meet the above technical requirements, the technical solution adopted by the present invention is: an anti-deformation clamp suitable for heat treatment of D-type shackles, characterized in that it includes a D-type shackle body and a clamp body, and adjustable thread segments are symmetrically provided at both ends of the clamp body, and a limiting nut is provided on the adjustable thread segment, and the D-type shackle body is limited by the cooperation of the limiting nut and the adjustable thread segment.

[0005] Preferably, the middle portion of the clamp body is configured as a cylinder, and the diameters of the threaded sections at both ends of the clamp body are smaller than the diameter of the middle cylinder.

[0006] Preferably, the diameter of the cylindrical body in the middle of the clamp body matches the diameter of the transverse pin hole of the D-shaped shackle body.

[0007] Compared with the traditional structure, the utility model has the following beneficial effects: simple structure, reasonable design, and adopts a cylindrical clamp body design. Before heat treatment, the clamp body is installed in the cross pin hole of the shackle, and the two ends are locked by fixing nuts to ensure that the inner size of the shackle after heat treatment will not exceed the dimensional tolerance requirements, thereby ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the structure of the utility model;

[0009] Figure 2 This is a schematic diagram of the installation structure of the utility model;

[0010] Figure 3 This is a schematic diagram of the structure of the D-type shackle body of the utility model;

[0011] Figure 4 This is a schematic diagram of the outward expansion of the D-type shackle after heat treatment;

[0012] In the figure: 1. D-type shackle body, 11. cross pin hole, 2. clamp body, 3. limit nut, 4. adjustable thread section. DETAILED DESCRIPTION

[0013] The utility model is further described below.

[0014] Referring to the accompanying drawings, an anti-deformation clamp suitable for heat treatment of D-type shackles is characterized in that it includes a D-type shackle body 1 and a clamp body 2, and adjustable thread segments 4 are symmetrically provided at both ends of the clamp body 2, and a limiting nut 3 is provided on the adjustable thread segment 4, and the D-type shackle body 1 is limited by the limiting nut 3 and the adjustable thread segment 4.

[0015] In this preferred embodiment, the middle portion of the clamp body 2 is configured as a cylinder, and the diameters of the threaded sections at both ends of the clamp body 2 are smaller than the diameter of the middle cylinder.

[0016] In this preferred embodiment, the diameter of the cylindrical body in the middle of the clamp body 2 matches the diameter of the transverse pin hole 11 of the D-type shackle body.

[0017] In specific implementation, a cylindrical clamp body is designed, the diameter of the clamp body matches the size of the shackle cross pin hole, threads are turned on both ends of the clamp body, and locked by limit nuts. Before heat treatment, the clamp body is installed in the cross pin hole of the shackle body. Figure 1 As shown, heat treatment is then carried out. After the end, the limit nut is removed and the shackle body can be subsequently machined. The clamp is made of M3 grade material and tempered to HRC36-42.

[0018] The above embodiments of the present invention are merely examples to clearly illustrate the present invention, but are not intended to limit the scope of protection of the present invention. All equivalent technical solutions also fall within the scope of the present invention. The scope of patent protection of the present invention should be defined by the claims.

Claims

1. An anti-deformation fixture suitable for heat treatment of D-type shackles, characterized by: The invention comprises a D-shaped shackle body (1) and a clamp body (2). Adjustable threaded sections (4) are symmetrically provided at both ends of the clamp body (2). A limiting nut (3) is provided on the adjustable threaded section (4). The D-shaped shackle body (1) is limited by the cooperation of the limiting nut (3) and the adjustable threaded section (4).

2. The anti-deformation fixture suitable for heat treatment of D-type shackles according to claim 1, characterized in that: The middle portion of the clamp body (2) is configured as a cylinder, and the diameters of the threaded sections at both ends of the clamp body (2) are smaller than the diameter of the middle cylinder.

3. The anti-deformation fixture suitable for heat treatment of D-type shackles according to claim 1, characterized in that: The diameter of the central cylinder of the clamp body (2) matches the diameter of the transverse pin hole (11) of the D-shaped shackle body.

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