CN205572324U - Ship engine piston mounting tool - Google Patents

Abstract

The utility model discloses a tool for installing a ship engine piston, which comprises a guide ring and a ring bolt; the guide ring is in the shape of a ring; Threaded holes, eyebolts and guide ring threaded connection. The utility model has small volume and simple structure. The guide ring is made of cast steel after aging treatment, which is not easy to deform. During use, the contact between the piston and the cylinder liner is avoided, and the scratch of the cylinder liner is prevented. At the same time, the tightening of the piston ring is completely completed by the extrusion force generated by the piston's own weight and the inner hole cone of the guide ring, which reduces the difficulty of operation and the labor intensity of workers.

Description

Marine engine piston installation tool

technical field

The utility model relates to the technical field of mechanical tools, in particular to a tool for installing a piston of a ship engine.

Background technique

When installing the piston of a large engine, due to the large size of the piston and the piston ring on the piston, and the outer diameter of the piston ring is larger than the inner diameter of the cylinder liner in a free state, it is often necessary to use a lifting device and a piston installation tool to install the piston. Put it into the cylinder liner. Most of the existing large-scale piston installation tools are large in size and complicated to operate, and it is easy to cause scratches on the cylinder liner due to improper operation during use.

Utility model content

The utility model aims at the problem that most of the existing large-scale piston installation tools are large in volume and complex in operation, and are prone to scratches caused by improper operation during use, and provides a small volume, simple structure, easy operation and can prevent Marine Engine Piston Installation Tool for Cylinder Scratches.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a ship engine piston installation tool, including a guide ring and an eyebolt; The upper plane of the ring is symmetrically provided with threaded holes, and the eyebolts are threadedly connected with the guide ring.

Preferably, the guide ring is a steel casting.

Preferably, the guide ring is a guide ring with aging treatment.

Preferably, the diameter of the big end of the inner hole of the guide ring is larger than the outer diameter of the free state of the piston ring.

Preferably, the diameter of the small end of the inner hole of the guide ring is smaller than the inner diameter of the cylinder liner and larger than the outer diameter of the piston.

Preferably, two threaded holes are symmetrically provided on the upper plane of the guide ring.

The utility model has small volume and simple structure. The guide ring is made of cast steel after aging treatment, which is not easy to deform. During use, the contact between the piston and the cylinder liner is avoided, and the scratch of the cylinder liner is prevented. At the same time, the tightening of the piston ring is completely completed by the extrusion force generated by the piston's own weight and the tapered surface of the inner hole of the guide ring, which reduces the difficulty of operation and the labor intensity of workers.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is the A-A direction view of Fig. 1;

Fig. 3 is a schematic view of the utility model.

Among them: 1. Guide ring, 2. Eyebolt, 3. Piston, 4. Cylinder liner.

detailed description

As shown in Figures 1-3, the ship engine piston installation tool includes a guide ring 1 and an eyebolt 2; the guide ring 1 is a steel casting and is processed after aging treatment. The inner hole of the ring 1 is funnel-shaped with a large top and a small bottom. The diameter of the large end of the inner hole of the guide ring 1 is larger than the outer diameter of the free state of the piston ring, and the diameter of the small end of the inner hole of the guide ring 1 is smaller than the inner diameter of the cylinder liner and larger than the outer diameter of the piston; The upper plane is symmetrically provided with two threaded holes for installing eyebolts 2. The eyebolts 2 are standard parts and are used for hoisting of tools. The eyebolts 2 are threadedly connected with the guide ring 1. During use, the tool is hoisted to the top of the cylinder liner 4, and the inner hole of the guide ring 1 is aligned with the inner hole of the cylinder liner 4. Use the lifting device to lift the piston 3 vertically and align it with the inner hole of the guide ring 1. Adjust the lifting device so that the piston 3 slowly descends into the guide ring 1. After the piston 3 enters the guide ring 1, its own weight interacts with the tapered surface of the inner hole of the guide ring 1 to generate an inward extrusion force, so that the outer diameter of the piston ring is gradually reduced by extrusion until it enters through the smallest diameter end of the inner hole of the guide ring 1. inside the cylinder.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (6)

1. marine engine piston mounting tool, it is characterised in that: include guide ring (1) and lifting bolt (2)； Guide ring (1) is circular, the infundibulate that the endoporus of guide ring (1) is big up and small down, guide ring (1) Upper plane symmetry be provided with screwed hole, lifting bolt (2) is threadeded with guide ring (1).

Marine engine piston mounting tool the most according to claim 1, it is characterised in that: described guiding Ring (1) is steel-casting.

Marine engine piston mounting tool the most according to claim 2, it is characterised in that: described guiding Ring (1) is the guide ring using Ageing Treatment.

Marine engine piston mounting tool the most according to claim 1, it is characterised in that: described guide ring (1) endoporus outside diameter is more than piston ring free state external diameter.

Marine engine piston mounting tool the most according to claim 1, it is characterised in that: described guide ring (1) endoporus end diameter is less than cylinder sleeve internal diameter and more than piston external diameter.

Marine engine piston mounting tool the most according to claim 1, it is characterised in that: described guide ring (1) upper plane symmetry is provided with two screwed holes.