A ship engine crankshaft heat state deformation prevention handling lifting device

Abstract

The utility model discloses a kind of ship machine crankshaft hot deformation prevention handling lifting appliance under, including hoist hook, the upper end of hoist hook is hung and hung the ring, the lower end of hanging ring is set on the lug of crossbeam;The upper end of crossbeam is set strip-shaped through-hole, left hook and right hook are symmetrically set in the both ends of crossbeam;The upper end of left hook and right hook is clamped in the both ends of strip-shaped through-hole by upper nut and lower nut and then fixed on crossbeam;Left hook and right hook correspond with crankshaft connecting rod journal position;The vertical direction of crossbeam is provided with handle;The utility model has the advantages that: since lifting position is crankshaft center position, it can effectively reduce crankshaft bending deformation, and simplify crankshaft lifting operation;After hot correction, it does not need to blow cooling, each crankshaft can save 20min, substantially improve production efficiency by more than 50%, and ensure product quality;Meanwhile, it also improves the security of operation.

Description

Technical Field

[0001] This utility model relates to the field of machinery, specifically a lifting device, and more specifically a crankshaft lifting device for marine machinery. Background Technology

[0002] When the crankshaft of a marine engine is hot-calibrated using residual heat after normalizing, it needs to be cooled by blowing air for more than 20 minutes to below 500°C after calibration by a press. Then, it is hung by workers using a ring-shaped iron chain (such as...). Figure 5 The crankshaft is suspended by chains hanging from both ends. This quenching suspension method has the following drawbacks:

[0003] 1. The crankshaft is suspended by an iron chain, which makes it prone to bending and deformation.

[0004] 2. After the crankshaft is thermally corrected, it needs to be cooled by blowing air for more than 20 minutes, which results in very low production efficiency;

[0005] 3. Difficult to operate: The operator needs to be close to the crankshaft at high temperatures to hang the chain on the crankshaft journal, which lacks safety. Utility Model Content

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a hot-deformation-resistant handling lifting device for marine engine crankshafts, including a lifting hook, the upper end of which is hooked onto a lifting ring, the lower end of which is set on a lifting lug on a crossbeam; a strip-shaped through hole is provided at the upper end of the crossbeam, and a left hook and a right hook are symmetrically arranged at both ends of the crossbeam; the upper ends of the left hook and the right hook are clamped at both ends of the strip-shaped through hole by an upper nut and a lower nut, and thus fixed to the crossbeam; the left hook and the right hook correspond to the positions of the crankshaft connecting rod journals; a handle is provided in the vertical direction of the crossbeam.

[0007] A strip-shaped groove is provided at the upper end of the strip-shaped through hole.

[0008] The upper end of the strip-shaped through hole is provided with a rough surface.

[0009] The front end of the handle is threaded, and the handle is screwed into the threaded hole of the crossbeam.

[0010] The advantages of this utility model are:

[0011] Because the hoisting position is at the center of the crankshaft, it can effectively reduce crankshaft bending deformation and simplify crankshaft hoisting operations; after heat correction, there is no need for air cooling, which can save 20 minutes per crankshaft, greatly improve production efficiency by more than 50%, and ensure product quality; at the same time, it also improves operational safety. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Left view of position AA;

[0014] Figure 3 This is a schematic diagram showing the installation of the hook and the crossbeam;

[0015] Figure 4 For Figure 3 Top view;

[0016] Figure 5 This is a schematic diagram illustrating the operation of existing technology;

[0017] Figure 6 This is a schematic diagram illustrating the operation of this utility model. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings. As shown in the drawings, the present invention includes a lifting hook 6, which hooks the upper end of a lifting ring 5. The lower end of the lifting ring 5 is set on a lifting lug 14 of a crossbeam 1. A strip-shaped through hole 11 is provided at the upper end of the crossbeam 1. A left hook 2 and a right hook 3 are symmetrically arranged at both ends of the crossbeam. A threaded section is provided at the upper end of the left hook 2 and the right hook 3. The threaded section is clamped at both ends of the strip-shaped through hole by an upper nut 7 and a lower nut 8, thereby fixing the left hook 2 and the right hook 3 to the crossbeam 1. The left hook 2 and the right hook 3 correspond to the connecting rod journal position of the crankshaft 9. A handle 4 is provided in the vertical direction of the crossbeam 1.

[0019] To ensure that the upper nut 7 does not protrude from the crossbeam 1, a strip groove 12 is provided at the upper end of the strip-shaped through hole. Obviously, the depth of the strip groove 12 must exceed the height of the upper nut.

[0020] To prevent the left hook 2 and right hook 3 from shifting along the strip-shaped through hole and increasing resistance, a rough surface 13 is provided at the upper end of the strip-shaped through hole.

[0021] The front end of the handle 4 is threaded, and the handle is screwed into the threaded hole of the crossbeam.

[0022] This utility model is applied to the lifting method of marine engine crankshafts after thermal correction:

[0023] Crankshaft hoisting: Before use, adjust the hook to a suitable spacing according to the dimensions between the crankshaft and connecting rod journals; during production, use the hoisting hook to lift the lifting tool, align it with the crankshaft and connecting rod journal position, lift the heat-corrected crankshaft, and use the control handle and crane to transfer the crankshaft to the cooling area.

[0024] This utility model has the following features:

[0025] 1. After the marine engine crankshaft has been hot-calibrated, it can be directly transported to the cooling area using lifting equipment without deformation during the lifting process;

[0026] 2. Workers do not need to be near the hot crankshaft to hang the hoisting chains, reducing the risk of worker injury in high-temperature environments;

[0027] 3. Improve the efficiency of crankshaft thermal correction.

Claims

1. A hot-deformation-resistant handling hoist for marine engine crankshafts, comprising a lifting hook, characterized in that: The lifting hook is attached to the upper end of the lifting ring, and the lower end of the lifting ring is set on the lifting lug of the crossbeam; the upper end of the crossbeam is provided with a strip-shaped through hole, and the left hook and the right hook are symmetrically arranged at both ends of the crossbeam; the upper ends of the left hook and the right hook are clamped at both ends of the strip-shaped through hole by the upper nut and the lower nut and thus fixed to the crossbeam; the left hook and the right hook correspond to the position of the crankshaft connecting rod journal; a handle is provided in the vertical direction of the crossbeam.

2. The anti-deformation handling and lifting device for marine engine crankshafts under hot conditions according to claim 1, characterized in that: A strip-shaped groove is provided at the upper end of the strip-shaped through hole.

3. The anti-deformation handling and lifting device for marine engine crankshafts under hot conditions according to claim 1, characterized in that: The upper end of the strip-shaped through hole is provided with a rough surface.

4. The anti-deformation handling and lifting device for marine engine crankshafts under hot conditions according to claim 1, characterized in that: The front end of the handle is threaded, and the handle is screwed into the threaded hole of the crossbeam.

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