DE2723397A1 - SOUND-INSULATED OIL PAN FOR COMBUSTION ENGINES - Google Patents

Description

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Dr. Vf F vse

Aktiengesellschaft Adolph Saurer / 9 320 Arbon

Sound-insulated oil pan for internal combustion engines

The invention relates to a sound-insulated oil pan for internal combustion engines, consisting of one on the crankcase connectable intermediate frame and an actual tub, with the intermediate frame and tub each having an edge have, and are connected by a rubber elastic bead resting on both edges.

June 23, 1976 / YB - 1 -

709882/0690

Oil sumps, in which the transmission of the Gas engine and control forces generated crankcase vibrations on their large scale as a resonator acting surfaces is prevented are known. One solution in particular has been proposed (MTZ 32, 1971) 5, p. 148, in which the edges are horizontal or inclined and possibly over the Gununi bulge protrude.

This solution has the disadvantage that the tub is insufficiently guided in the lateral direction, causing metallic impacts between the edges and the side walls of the intermediate frame or the tub result and also the connection subject to impermissible shear loads.

The invention aims to overcome these drawbacks. This is achieved by the fact that the edges overlap and are inclined and have rounded transitions with the side walls of the intermediate frame and the tub are connected and that the Gununiwulst is mainly vulcanized in the fillets of the roundings.

709882/0690

This gives the rubber bead an incline and 27 23 397 greater rigidity in the horizontal direction. Its connection area with the metal parts is also enlarged.

The horizontal distance between the edge of the tub and the intermediate frame side wall is preferably less than the one from the intermediate frame edge to the tub side wall, the tub edge edge being vulcanized with one Rubber layer is coated: Therefore, metallic knocks between the edge and the side wall avoided with larger lateral shifts of the oil pan.

To avoid oil build-up in the channel formed by the rubber bead and the inner frame wall, it is preferred the edge of the tub at the deepest point of the tub edge have a depression of the same, so that the oil that got into the channel can flow back into the inside of the oil pan at this point.

An embodiment of the subject invention is then explained using a drawing.

709882/0690

1 shows a section of an oil pan in view on a longitudinal wall from the inside,

Fig. 2 is a section along section line II - II of
Fig. 1,

3 shows a section along the section line III - III
of Fig. 1.

A crankcase 1, which is only partially shown, has an end flange 2. With the help of screws 6, an oil pan 8 ~, which is also only partially shown, is attached via an intermediate frame 4. A seal 10 is inserted for sealing between the crankcase 1 and the intermediate frame 4. The intermediate frame 4 is provided with a frame flange 12, the inner surface of which, which faces the oil pan 8, has a bevel 13. The oil pan 8, for its part, is provided with a pan flange 15 which is provided with stops 17 distributed around the circumference. The frame flange 12 and the tub flange 15 overlap,

709882/0690

Hie is, so that the oil pan virtually to the intermediate frame 4 under the interposition of the Dämmwulstes 19 suspended from FIGS. 2 and 3 it can be seen, where between the two a Dämmwulst 19 lies. The tub flange 15 is also provided with a bevel 16 which is approximately parallel to the bevel 13.

At the lowest point of the usually slightly longitudinal * With the motor inclined on the axis, the pan flange 15 is pulled downwards so that a notch 21 is formed. this makes it possible that little oil is formed in the insulating bead 19 and the inner wall of the oil pan flange 15 Gutter remains.

The insulating bead 19 forms the core of the sound insulation. This bead 19, made of rubber-elastic material is preferably vulcanized on the frame flange 12 in the region of the groove, and in addition also on Wannenflansch 15 in the embodiment shown in FIGS. 2 and 3 way as to avoid any unintended displacement between the frame 4 and the To prevent oil pan 8 and to achieve a tight connection. The insulating bead 19 extends to the lowest edge of the frame flange 12 and to the top

709882/0690

Edge of the Wannpnflansches 15. It therefore prevents any metallic contact between the oil pan 8 and the Intermediate frame 4.

The stops 17 extend close to the end flange 2 of the crankcase 1. These stops 17 are used the limitation of the movement between the crankcase 1 and the oil pan 8 in order to avoid excessive stress on the Dämmwulstes 19 to avoid tensile stress when the engine is placed on the tub during assembly work.

709882/0690

Claims (3)

»ATINTANWAU · Οββ MOMCHIN, May 24th, 1977/1 OR. WIlHElM HASSE PGm 4302 / Sau DlPtOMlNGiNlIUR 2723397 patent claims 1.) Sound-insulated oil pan for internal combustion engines, consisting of one that can be connected to the crankcase Intermediate frame and the oil pan, the intermediate frame and oil pan each having a flange, and through a rubber-elastic ViMlst resting on both flanges are connected, characterized in that the flanges (12, 15) overlap and are inclined (bevels (13, 16)) and connected to the side walls of the intermediate frame (4) and the oil pan (8) via rounded transitions are and that the rubber bead (19) is vulcanized mainly in the fillets of the roundings is. 2. oil pan according to claim 1, characterized in that the horizontal distance between the tub edge and the intermediate frame side wall 709882/0690
ORIGINAL INSPECTED smaller than that of the intermediate frame edge to the vannenside wall and that the tub edge is pulled over with a vulcanized rubber layer . 3. Oil pan according to at least one of the preceding claims, characterized in that a depression of the same is provided at the lowest point of the peripheral edge. 709882/0690