RU242563U1 - DEVICE FOR CONTROLLING THE RUNOUT OF NUT - Google Patents

Abstract

This utility model relates to mechanical engineering, specifically to runout measuring devices, and can be used to monitor the surface runout of nuts and other cylindrical parts with internal threads. A device for monitoring nut runout is proposed, consisting of a manually operated rotary table and a mandrel. A tapered bore is made in the rotary table's faceplate coaxial with its axis of rotation. The mandrel has a tapered shank at the bottom and an external thread at the top, with a supporting surface perpendicular to the axis of rotation beneath the thread. The mandrel is fixed to the faceplate under its own weight, with the tapered shank inserted into the tapered bore. The technical result consists of the ability to monitor the axial and radial runout of nuts with high accuracy.

Description

The utility model relates to mechanical engineering, in particular to devices for measuring runout, and can be used to control the runout of the surfaces of nuts and other cylindrical parts with internal threads.

The runout meter type B-10M is known according to TU 2-034-216-85, consisting of a base, a movable and fixed headstock with centers and an indicator mounted on the base with the possibility of linear and angular movement.

A disadvantage of this device is that the axis of the part being tested is horizontal, so to secure the part in its center, it must be held until it is compressed by the moving headstock. This makes the process quite labor-intensive and time-consuming for heavy parts. An additional device is also required to monitor nut runout.

A device for measuring the radial and axial runout of a component is known. It comprises a plate on which a circular base with support rollers is mounted at an angle on posts of different sizes. The component being tested, such as a cylindrical bushing or a labyrinth seal ring, is supported on this base. A radial and axial runout indicator, and an indicator with a measuring head are mounted on a stand, depending on the type of test being performed (according to patent RU91686, B23B 25/06, published February 27, 2010).

The disadvantage of this device is that the controlled part is not secured to the rollers in any way and is based solely on its own weight, which can lead to inaccuracies in measurement.

The closest technical solution is a device for measuring the radial and axial runout of a part, comprising a base with a housing fixed therein, a faceplate with a central hole, mounted so as to rotate in a bearing, the outer ring of which is fixedly mounted in the housing, a locating element, wherein the faceplate and the locating element have flat bases and interact with each other, and a radial runout meter for the part. The locating element is fixedly located in the central hole of the faceplate and a seat for the part being measured is made on its flat base. In addition, the device is equipped with a standard and a radial runout meter for the part, wherein the latter and the radial runout meter for the part are mounted on the base by means of stands (according to patent RU63728, B23B 25/06, published 10.06.2007).

The disadvantage of this device is that the base element is positioned on the faceplate along the cylindrical and end surfaces, which requires high precision manufacturing.

The technical result of the proposed utility model consists in the implementation of the possibility of monitoring the end and radial runout of nuts with high accuracy.

The said technical result is achieved in that the device for monitoring the runout of nuts consists of a rotary table with a manual drive and a mandrel and is distinguished by the fact that a conical hole is made in the faceplate of the rotary table coaxially with the axis of its rotation, a conical shank is made on the mandrel at the bottom, and an external thread is cut on the top, a support surface is made under the thread, perpendicular to the axis of rotation, the mandrel is fixed on the faceplate under its own weight, while the conical shank is inserted into the conical hole.

The tapered bore and tapered shank can be made in the form of a Morse taper.

The utility model is illustrated by the following drawings:

Fig. 1 - device for monitoring nut runout;

Fig. 2 - rotary table;

Fig. 3 - mandrel;

Fig. 4 - nut runout control.

The device for checking the runout of nuts (Fig. 1) consists of a rotary table 1 and a mandrel 2. The rotary table 1 contains a manual drive 3 and a faceplate 4. A conical hole 5 is made in the faceplate 4 (Fig. 2). On the mandrel 2, a conical shank 6 is made at the bottom (Fig. 3), and an external thread 7 is cut at the top. A supporting surface 8 is made under the thread 7.

Application

The device according to the utility model is used to check the axial and radial runout of nuts. For example, it can be used during the installation of the drive pulley unit of a passenger car generator on a wheelset, during which it is necessary to check the axial runout and the runout of the conical surfaces of the nuts. To implement this technological process, the rotary table 1 of the device is installed and secured on a fitter's workbench (not shown in the Fig.). The mandrel 2 (Fig. 4) is secured to the faceplate 4 under its own weight, while the tapered shank 6 is inserted into the conical hole 5. The nut 9 to be tested is screwed onto the thread 7 so that the end of the nut 9 rests on the supporting surface 8, ensuring the basing of the nut 9 on the mandrel 2. A stand 10 with an indicator 11 is placed on the workbench next to the device. The indicator 11 is brought to the surface to be tested. In Fig. 4 shows the process of monitoring the runout of the conical surface 12 of the nut 9. After which the faceplate 4 is rotated using the manual drive 3 and the runout value is recorded on the indicator 11.

High measurement accuracy is ensured by the conical fit of the mandrel 2 in the faceplate 4 of the rotary table 1, as well as the basing of the nut 2 on the mandrel along the thread 7 and the supporting surface 8. This ensures a minimal deviation of the axis of the nut 2 from the axis of rotation of the faceplate 4.

The use of a Morse taper in the conical hole 5 and shank 6 additionally ensures their reliable tight fixation relative to each other, which has a positive effect on the accuracy of the measurement.

Thus, the proposed technical solution makes it possible to control the end and radial runout of nuts with high accuracy, and thereby achieve the stated technical result.

Claims (2)

1. A device for checking the runout of nuts, consisting of a rotary table with a hand drive and a mandrel, characterized in that a conical hole is made in the faceplate of the rotary table coaxially with the axis of its rotation, a conical shank is made on the mandrel at the bottom, and an external thread is cut on the top, a support surface is made under the thread, perpendicular to the axis of rotation, the mandrel is fixed on the faceplate under its own weight, while the conical shank is inserted into the conical hole. 2. The device according to item 1, characterized in that the conical hole and the conical shank are made in the form of a Morse taper.