RU2307014C2 - Attachment for removing worn parts from hard-to-reach places - Google Patents

Abstract

FIELD: motor vehicle manufacture, possibly repairing motors and automatic gear boxes.

SUBSTANCE: attachment includes adaptor in the form of slit clamp and unclamping screw. Slit clamp is made in the form of tube of high-strength elastic material and it has in one end inner threaded portion where unclamping screw is mounted. Along axis of adaptor at least 6 through slits are formed; said slits do not achieve opposite end of tube by distance consisting of 0.8 - 1.2 of inner diameter of adaptor. It provides reliable fixation of worn parts being extracted out of hard-to-reach places of motor vehicle equipment.

EFFECT: improved reliability of fixing worn parts extracted from hard-to-reach places.

1 dwg, 1 ex

Description

The invention relates to the field of automotive industry and can be used in the repair of engine parts and automatic transmissions.

In the process of repairing automatic transmissions (automatic transmissions), a number of technological difficulties arise, namely the replacement of bushings, cuffs and oil seals in hard-to-reach places.

Removing these parts by the impact method leads to deformation of the crankcase surface, and in many cases to the rejection of expensive parts.

A known method of removing worn parts by mechanical methods: boring or milling on a machine, punching with a percussion instrument and a special guide made of aluminum alloy. However, this method does not allow to remove automatic transmission parts in hard-to-reach places.

A known method of removing worn parts from vehicle assemblies, based on the use of special devices (Sarkhoshyan G.N., Khlyavich A.I. GAZ-21 “Volga” car repair // M .: Transport, 1969, 240 p. S. 121, fig. 87). This device consists of special captures and a persistent screw clip. In the process, the grips fix the body of the unit being repaired, and the screw clamp squeezes the worn part. However, this device does not allow you to remove worn parts from the vehicle units located in hard-to-reach places.

The closest in technical essence to the claimed device is a collet for fastening parts during the process (Technology and equipment for fusion welding and thermal cutting / Edited by A.I. Akulov /. - M.: Engineering, 2003 - P.186. Fig. 4.16a). The part is inserted into the collet. Due to crimping the collet through the slots, the part is fixed. A significant drawback of the collet is that it reliably fixes the details during machining, which are inserted inside it. However, the collet does not allow to remove worn bushings from hard-to-reach places of car components due to its high rigidity.

The inventive device is intended for reliable fixation of worn parts in the process of their removal from hard-to-reach places of car units.

The essence of the claimed device lies in the fact that it is made in the form of a tubular nozzle, at one end of which an internal threaded section is made. Through the axis of the nozzle, through slots are made, and the slots pass through the threaded section, but do not reach the opposite end of the nozzle at a distance of 0.8-1.2 of the inner diameter of the nozzle. An expansion screw is screwed into the nozzle from the side of the threaded portion.

The drawing shows the inventive device assembly.

The device consists of a tubular nozzle 1 and an expansion screw 2. A screw 2 is installed in the nozzle 1 along the thread 3. On the surface of the sleeve there are through slots 4. The slots pass through the threaded section, but do not reach the opposite end of the nozzle at a distance of 0.8-1, 2 of its inner diameter.

When the distance from the end of the nozzle is less than 0.8 of its inner diameter, a decrease in the rigidity of the nozzle and damage to its petals during operation are observed. At a distance of more than 1.2 of its inner diameter, the force required for reliable fixation of the extracted part increases. Therefore, the optimal distance should be considered within 0.8-1.2 of the inner diameter of the nozzle.

When removing bushings, oil seals or cuffs from hard-to-reach places of the vehicle assemblies, the claimed device works as follows: the tubular nozzle 1 is inserted inside the oil seal. The spring part of the nozzle 1 is locked due to the elastic properties of the material of the nozzle and is fixed when the expansion screw 2 is screwed into the threaded part 3 of the nozzle 1. For the threaded hole 5, the expansion screw is attached to the rod by means of an eye (not shown conventionally in the drawing).

After removing the oil seal from the gearbox, the disassembly of the device occurs in the reverse order.

To remove the oil seals from the automatic transmission, a device was manufactured with a tubular nozzle length of 100 mm with an inner diameter of 25.4 mm and an outer diameter of 27.4 mm. In the nozzle, 6 slots were made with a width of 2 mm and a length of 80 mm. The threaded section had an M24 thread with a section length of 20 mm. The nozzle was made of steel 30KhGSN2A with a tensile strength of 1600-1800 MPa.

The inventive device allows you to quickly remove parts such as oil seals from hard-to-reach places of car units without destroying their body.

Claims (1)

A device for removing worn parts installed in hard-to-reach places, containing a nozzle in the form of a split collet and an expansion screw, characterized in that the split collet is made in the form of a tube of high-strength elastic material, from one end of which an internal threaded section with an expanding screw installed in it is made and along the axis of the nozzle at least 6 through slots are uniformly made, which do not reach the opposite end of the nozzle at a distance of 0.8-1.2 of its inner diameter.