DE8805097U1 - Sealing device against splash water and dirt - Google Patents

Description

Description
,/Sealing device against splash water and dirt.

The invention relates to round-cylindrical protective housings for accommodating devices that are subject to or undergo constantly changing length changes, such as springs and lifting cylinders.

Sealing devices using grease or oil-soaked felt rings as well as a variety of elastomer profile sealing rings or scrapers are used here,

The sealing elements used place high demands on construction tolerances and surface quality of the housing parts to be sealed, they require complex and careful assembly, they are usually permanently installed in the lower housing part and often require an increase in the housing diameter to accommodate them, they act mainly on the outer diameter of the inserted housing part; this area is exposed to damage - considerable wear and tear occurs and the housing soon becomes inoperable. Sealing elements of this kind do not allow pressure equalization.

The invention is based on the object of designing the housing parts to be sealed and the sealing elements in the functional area in an inexpensive and effective manner.

The internal sliding surface with low demands on construction tolerances and surface quality is arranged in a protected manner. The sliding sealing ring, which is pre-stressed against the sliding surface, and the contact between the sliding ring face and the beveled ring groove flank of the inner housing, which is achieved by a soft round-belted ring, provide a permanent seal against splash water and dirt. The pressure difference that occurs during the stroke creates a reinforcing sealing effect. After reaching and remaining in the new position, pressure equalization takes place via the ring slot.

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The invention is illustrated by the embodiment shown in the drawing.

Fig» 1 Longitudinal section with outer casing (i) , sliding surface (1 a) ,

inner housing (2), annular groove (2 a) , annular groove flanks (2 b), annular groove base (la ), sliding seal ring (3), distance (3 b), O-ring (4).

Fig. 2 Cross section through Fig. i in the area of the sliding seal

vinrroc with Rinasciliitz &iacgr; 3 ai .

Fig. 3 Longitudinal section with key (5) arranged at the top as &idiagr;

Anti-twist device. |

Fig. 4 Cross section through Fig. 3 in the area of the sliding seal |

ring with ring slot (3a)* |

Claims (3)

*..' ..* \,"A£,fenzß.leh,en: G 88 05 097.1 ■ a · · 1. Sealing device against splash water and dirt for round-cylindrical protective housings with lifting movements, characterized, that in an annular groove (2 a) with bevelled annular groove flanks (2 b) on the inner housing (2), a slotted,
preformed sliding seal (3) made of abrasion-resistant hard polyamide tape is arranged, which leaves a clear distance (3b) to the ring groove base (2c) and the ring slot (3a) in the middle at the top, so that the soft O-ring (4) inserted into the ring groove causes a permanently elastic contact between the sliding seal and the ring groove flank. 2. Sealing device according to claim 1, characterized, that when the sliding seal ring is formed from a strip into a ring, a slight outside diameter oversize is created compared to the inside diameter of the outer housing (1), which in the assembled state results in a permanent all-round contact with the sliding surface (1 a) and a ring slot remains. 3. Sealing device against splash water and dirt for round cylindrical protective housings with lifting movements
using a key (5) arranged above as an anti-twisting device according to claims 1 and 2, characterized, that the remaining ring slot (3a) is kept at a clear distance from the key flanks. 4 * Λ 4 I · · 1 f. 4 · ··· · : &iacgr;&iacgr;:&iacgr;&iacgr;&iacgr;