DE3503602C1 - Assembly-assisting ring for shaft sealing rings - Google Patents

Abstract

In an assembly-assisting ring for shaft sealing rings which have a sleeve-shaped outer casing which can be inserted into a bore and a diaphragm-like sealing lip which interacts in a sealing manner with the shaft, an assembly-assisting ring (9) of harder material than the sealing lip (5) is snapped into the inner circumference (10) of the sleeve-shaped casing part (4) and has a funnel-like flange (12) which extends radially inwards towards the sealing lip (5) and is provided with an opening (13) of somewhat greater clear width than the diameter of the shaft (8). <IMAGE>

Description

ORIGINAL INSPECTED

Latching a wandering or rattling is safely avoided.

Of course, the assembly aid ring is within the scope of the invention in other forms of application in the form of a stamped sheet metal part with a corresponding funnel-like flange design or else the funnel-like flange made of the material of the reinforcement of the shaft sealing ring or of the material of the Shaft seal itself to be produced in one piece.

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Claims (4)

1 2 terials as the sealing lip with the inner circumference of the hül- patent claims: sen-shaped casing part is connected or latched and one extends radially inwards to the sealing lip. 1. Auxiliary assembly ring for shaft sealing rings, which has a funnel-like flange which is provided with a sleeve-shaped 5 opening that can be inserted into a bore and has a slightly larger clear width than the outer jacket and a diameter of the shaft that seals with the shaft Monsam-like, membrane-like sealing lip, in which the shaft sealing ring is already in the form, characterized in that a housing is inserted and the shaft from the inside of the housing, assembly aid ring (9) made of a harder material than that must be pushed into the shaft sealing ring, _t sealing lip ( 5) with the inner circumference (10) of the sleeve 10 the shaft is locked through the funnel-like flange to the extent that the zen-shaped casing part (4) and one traverses so that the sensitive sealing lip on the shaft end to the sealing lip (5) radially having inside extending, de envisaged bevel safe and without letting funnel-like flange (12), which with a zungsg efahr can slide up. Passage opening (13) of a somewhat larger, clearer part in the figure in the form of a plastic ring Width than the diameter of the shaft (8) provided 15 showed assembly aid ring can of course also in is. Be designed in the form of a stamped sheet metal part or in one 2. Auxiliary assembly ring according to claim 1, characterized in that the piece with the reinforcement ring or the material that it consist in a known manner from al of the shaft seal. tough plastic. The invention is based on one in the drawing 3. Auxiliary assembly ring according to claim 1, characterized in the illustrated embodiment shown, indicates that it is made from a stamped sheet metal part stands. . The figure shows a vertical section through the arrangement 4. Auxiliary assembly ring according to claim 1, characterized in that a shaft sealing ring in the housing is identified by the that it is integral with the assembly aid ring according to the invention during the Monrial the reinforcement ring or the plastic assembly process of the shaft. material of the shaft seal is formed. In the figure, 1 is in a bore 2 in a housing a shaft sealing ring 3 is arranged, which in a known manner consists of a sleeve-shaped outer jacket 4 and a membrane-like sealing lip 5 consists. The outside 30 jacket 4 can be stabilized in a known manner by an angular reinforcing ring 6 made of metal. The invention relates to an assembly aid- The sealing lip 5 has at its radially inner end a « ring for shaft seals on the sealing edge 7, which is very sensitive in the preamble of Pa, which is connected to a shaft 8 I Tentänspruchs 1 explained Art. to cooperate sealingly. \ From DE-PS 23 40 275 is about an assembly aid 35 The shaft 8 has here in the usual way at its \ ring known for shaft seals of the type described, a bevel 9 at the end. However, this assembly aid ring can only be used there- Is shown in dashed lines as in the figure where the shaft sealing ring is inserted from the inside of the housing from the inside of the shaft 8, housing mounted shaft is pressed. so radial deviations can occur that would The known assembly aid ring also has 40, the shaft to meet the sealing lip 5 directly the disadvantage that after installation it is overstretched or folded over and injured must become. Another disadvantage of this tongue would be the sensitive sealing edge 7. Assembly aid ring consists in the fact that it is the membrane according to the invention is therefore an assembly aid ring like sealing lip expands, so that it is only made of harder material than the sealing lip, in the present case with a spring ring to support it, the case made of tough, hard plastic is turned inside out can be. The object of the invention is an assembly aid-corresponding outer circumference 11 of the assembly aid ring the explanatory 9 in the preamble of claim 1 latches. The side facing the inside of the housing th type to create, but for a sealing ring, one of the auxiliary assembly ring 9 here has a funnel-shaped membrane Sealing lip without spring washer-supported flange 12, which is provided with a passage opening 13 tongue and which, when already mounted in the housing, have a slightly larger clear width than the diameter ter position an insertion of the shaft against that of the shaft 8 is provided. Sealing lip of a sealing ring allows without it As shown in the figure shown in full lines can be seen by tilting or offsetting the shaft end assembly situation, becomes a radial downturn the insertion process to damage 55 softening of the shaft 8 during assembly by the trichder Sealing lip comes such damage, they are centered ter-like flange 12 so that the sensitive only of a minor nature, make very borrowed sealing edge 7 only a small amount the * must rise quickly due to early leakage losses and thus ent-bevel 9 on the shaft 8, for which "* j Related guarantee claims increase costs due to their elasticity and the -p attached noticeable and damage the company's image. 60 lubricants without further ado. <T According to the invention, this object is achieved by the assembly aid ring according to the invention according to which an assembly aid ring for shaft seals will damage the sealing lip 5 and dedem The preamble of claim 1 reliably avoids the sealing edge 7, which is sensitive in terms of characterization, and Part of claim 1 features indicated by the locking of the auxiliary assembly ring 9 with the having. 65 Shaft sealing ring 3, these two parts can be For claims 2 and 3, protection will only be installed in one work step and the with the main claim. Assembly aid ring 9 needs after assembly, The fact that an auxiliary assembly ring made of harder Ma- shaft 8 can no longer be removed because of his