RU221984U1 - Device for unpressing equipment pulleys - Google Patents

Abstract

The utility model relates to repair and installation tools. The device contains a traverse, two grips and a screw, while it is additionally equipped with a nut with a threaded hole, made with two parallel edges and protrusions to ensure alignment of the screw in the center of the shaft end; the traverse is made in the form of a welded structure of sheet plates and channels facing each other each other with the outer edges of the walls, with a distance between them equal to the distance between the edges of the nut, and the stop, while the channels and the stop form grips, and the nut is installed between the two walls of the two channels. The technical result is the creation of a device for unpressing a pulley from a shaft in the absence of a hydraulic unpressing device and when access is difficult. 2 ill.

Description

The utility model relates to repair and installation tools.

The device of a screw puller for pulleys and bearings IZELTAS is known. model 7010292520 (www.Vseinstrumenti.ru). It consists of a traverse, two grips placed on it, capable of moving along it, and a screw, which, when rotated in a threaded hole in the center of the traverse, creates the required force to remove the pulley when it is engaged by the grips and the screw stops at the end of the shaft. The device does not allow working with large-sized products. In this case, a hydraulic depressurization device is required.

The purpose of the utility model is to create a device for unpressing a large pulley from a shaft in the absence of a hydraulic unpressing device, and also when access is difficult. This device can be used for on-site repair of sawmill equipment.

The problem is solved by the proposed device for unpressing a large equipment pulley.

containing a traverse, two grips, a screw, which is additionally equipped with a nut with a threaded hole to ensure alignment of the screw in the center of the shaft end, and the nut is installed between the two outer edges of the walls of two channels, and the traverse is rigidly connected to the grips.

The essence of the utility model is illustrated by graphic materials,

In fig. 1 shows a general view of the assembled device, where:

1 – nut.

2 – screw.

3 – traverse.

4 – channel.

5 – channel.

6 – plate.

7 - stop.

In fig. Figure 2 shows an image of a nut.

The proposed device consists of a nut (item 1, Fig. 1), a screw (item 2, Fig. 1) and a traverse (item 3, Fig. 1), a welded structure made of channels No. 14 (item 3, 4, 5; Fig. 1) and sheet plates 8 mm thick (items 6, 7; Fig. 1). In this case, two channels (item 5) face each other with the outer edges of the walls with a distance between them equal to the distance between the faces of the nut (Fig. 2). The channels (pos. 3, 4) and the stop (pos. 7) form fixed grips. The plates (item 6) provide resistance to the torque from the nut and provide rigidity to the yoke structure. The protrusions of the nut outside the edges absorb the force of the screw on the traverse.

It should be noted that the nut is made with two parallel edges and two projections. This ensures its immobility during operation (torsion) of the screw and the ability to move along the traverse within 20 mm to center the screw relative to the center of the shaft end. The traverse is made of channels integral with the grips by welding. In this case, the grips grip the outer rim of the pulley in diameter. This avoids the influence of a large bending moment on the traverse and increases the strength of the structure.

It was experimentally determined that the required force to remove the pulley is 9000 kg, and the torque on the screw is approximately 70 kg/m. In this case, the traverse is subjected to a large bending moment. It is made of high-strength material with appropriate rigidity.

When using the claimed device, it must be put on the pulley from top to bottom to the center of the shaft, center the nut on the shaft, then secure in this position with the force of the screw. Next, you need to use a wrench with the appropriate lever to tighten the screw until the pulley unpresses. The pulley is grabbed by the device's grips by the outer rim of the pulley

Thus, the inventive device for unpressing a large-sized equipment pulley allows operation in the absence of a hydraulic unpressing device, and also when access is difficult.

Claims (1)

A device for unpressing a pulley from an equipment shaft, containing a traverse, two grips and a screw, characterized in that it is additionally equipped with a nut with a threaded hole, made with two parallel faces and protrusions to ensure alignment of the screw in the center of the end of the shaft, the traverse is made in the form of a welded structure from sheet plates and channels facing each other with the outer edges of the walls, with a distance between them equal to the distance between the edges of the nut and the stop, while the channels and the stop form grips, and the nut is installed between the two walls of two channels.