DE8331188U1 - SUCTION AIR FILTER FOR INTERNAL COMBUSTION ENGINES, COMPRESSORS AND OTHER AIR SUCTION MACHINES - Google Patents

Description

I · 1 »· t · * · ** Μ4

1984 file. _;

October 27, 1983

Applicant: FILfERWERX MANN & HUMMEL GMBH, Hindenburgstrasse 37-45 / 7140 Ludwigsburg

Intake air filter for internal combustion engines, Compressors and other air-sucking

machinery

The invention relates to an air intake filter for Internal combustion engines, compressors and other air-sucking machines according to the preamble of the main claim. 5

In practice, an intake air filter was known at a wing nut used to fasten the filter element in the filter housing, together with a flat sealing ring and a metal washer, a pre-assembled one Assembly forms.

The metal disc is designed here as a plate-shaped drawn part, which has two axially protruding lugs on the edge . The flat sealing ring is attached to the outside of the bottom of the plate by gluing. To fix the nut to the metal washer, the lugs are bent inwards with a tool over the collar of the nut.

A disadvantage of the known design is that the gluing of the sealing ring requires special care and thus involves increased effort. Also required

1984 file. · ": '::: -''

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the production of the metal washer designed as a drawn part and its attachment to the nut several work ' corridors. Because between the mother and the metal washer only There is metallic contact / a reliable S seal is not guaranteed at this point / so that unwanted dusty air can reach the clean air side.

The object of the invention is / the production of the sealing ring, metal washer and nut Simplify assembly.

According to the invention, the object is defined by the features in Characteristics of the main claim solved.

The sealing ring and the metal disk can now be easily deformed with elastic deformation of the edge part Set the sealing ring on the collar of the nut without the need for special tools. An adhesive connection is avoided and a secure connection of all components is guaranteed. Can also be used as a metal disc a cheap, standardized washer can be used Effort can be produced as an injection molded part.

A further facilitation of the assembly results from the fact that several locking cams from the edge part of the sealing ring protrude inwards.

To avoid undercuts and thus slides in the injection molding tool for the sealing ring, the The end wall of the sealing ring has a slot in the area of each locking cam, the clear width of which in the circumferential direction at least the length and the width of which corresponds to at least the radial depth of the locking cam. This can be also achieve easy demolding.

1984 file

According to a further proposal of the invention, the nut has a centering shoulder on the end face facing the collar, which penetrates the metal disc with radial play and the sealing ring in a radially sealed manner. So that is in everyone Case ensures a secure seal.

The invention is explained in more detail below with reference to an exemplary embodiment shown in the drawing. Show it:
10

Figure 1 shows an air intake filter partially in view, partially in section,

FIG. 2 shows the sealing device of the intake air filter of FIG. 1 in an enlarged view

position, partly in section,

FIG. 3 shows the sealing ring of FIG. 2 in a view

from below, partly in section. 20th

The intake air filter 10 has a cup-shaped filter housing 11, from the housing bottom 12 of which a clean air nozzle 13 opens. The housing jacket 14 is provided with an unfiltered air intake pipe 15 provided and merges into a paragraph 16 at the edge, which is followed by a guide collar 17.

A cylindrical guide wall 20 is arranged on the housing base 12 and has a guide vane ring 21 at its free end * The filter housing 11 is closed by a removable dust container 25 on the lower open end, with its edge a container lid 27 provided with a dust discharge opening 26 against the shoulder 16 presses. The pressing force is not shown Latches generated.

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1984 file

Inside the filter housing 11 is an annular filter insert 30 / the end face adjacent to the housing base 12 has an annular end disk 31 has and sealed by a seal 32 against the Housing bottom 12 rests on the one facing away from housing bottom 12 The front side of the filter insert 30 has a cover disk 34 that separates the clean air side from the unfiltered air side represents separating wall.

A threaded bolt 41 is fastened to a transverse web 40 anchored in the clean air connection 13 and penetrates an opening 35 in the cover disk 34 of the filter insert 30 and a sealing device 45, which is described in more detail below. The axial clamping of the filter housing 11 and the filter insert 30 against one another takes place by means of a nut screwed onto the end 42 of the threaded bolt 41, for example a wing nut 46.

As can be seen from FIG. 2, there is the sealing device 45 from a metal disk 47 designed as a flat ring and an elastic sealing ring 50. The Sealing ring 50 has an end wall 51 with a bore 52 which has a circumferential sealing bead 53. On the front wall 51 is adjoined by a narrow edge part 54 which projects in the axial direction and of which several latching cams 55 protrude inwards. In the area of each locking cam 55, the end wall 51 of the sealing ring 50 has a slot 56, its clear width w in the circumferential direction of length 1 and its width b of the radial depth t of the locking cam 55 corresponds (see Figure 3).

The wing nut 46 has a collar 61 and a centering shoulder 62 on its end face 60. Together with the Metal disk 47 and the sealing ring 5O a preassembled assembly. When assembling the assembly, first

1984 file

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the Mratall disk 47 on the inside of the end wall 51 of the sealing ring 50 placed. Thereafter, the wing nut 46 is set while elastically deforming the edge portion 54 in the sealing ring 50, the locking cams 55 overlapping the collar 61 of the wing nut 46. The metal disc 47 and the sealing ring 50 are thus rotatably fixed on the collar 61 of the wing nut 46. The centering approach penetrates 62 of the wing nut 46, the metal washer 47 with radial play and the sealing ring 50 with radial sealing the sealing bead 53.

When the filter insert 30 is tightened against the housing base 12, the assembly thus preassembled is screwed on the end 42 of the threaded bolt 41. The wing nut 46 presses with its end face 60 against the metal washer 47 and via this against the sealing ring 50, which is pressed against the cover plate 34.

During the operation of the intake air filter 10, the contaminated occurs Air through the raw air intake pipe 15 into the interior of the filter housing 11 and passes the guide vane ring 21, by which it is brought into a rotational movement will. By centrifugal force, the coarse dust is pushed outwards to the housing shell 14 and passes through the dust * discharge opening 26 in the removable dust container 25. The air passes through the filter element 30 radially from the outside to the inside and leaves the intake air filter 10 through the Clean air connection 13.

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Our reference: File 1984 j; : ··; : ·., »

BOTH SEMI-FILLING I.

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Patient 155 / la

10 To the suction air filter 40 Crossbar 11th Filter housing 41 Threaded bolt 12th Case back 42 end 13th Air inlet 43 14th Housing jacket 44 15th Raw air intake pipe 45 Sealing device 16 unit volume 46 Wing nut 17th Leadership collar 47 Metal disk 18th 48 19th 49 20th Guide wall 50 Sealing ring 21 Guide vane ring 51 Front wall 22nd 52 drilling 23 53 Sealing bead 54 Edge part 25th Dust container 55 Locking cams 26th Dust discharge opening 56 slot 27 Container lid 57 28 58 29 59 30th Filter insert 60 Front side 31 End disk 61 Federation 32 poetry 62 Centering shoulder 33 63 34 Cover panel 64 35 opening 65 36 66 37 67 38 68 39 69

Claims (4)

• ·· _ I October 27, 1983 Claims 1.Suction air filter for internal combustion engines, compressors and other air-sucking machines with a threaded bolt for axially clamping components against each other, which penetrates a wall separating the clean air side from the unfiltered air side and a sealing device consisting of an elastic sealing ring and a metal disc resting against it, against the one mother suppressed, wherein the nut has a collar in the pressing against the metal disk face on which the sealing S is fixed for rotation, characterized in that the metal scissors (47) is formed as a flat ring and in that the Di shtring (50) in the axial direction protruding narrow edge part (54) which the collar (61) overlaps the nut (46). 2. intake air filter according to claim 1, characterized in that the edge part (54) of the sealing ring (50) several Latching cams (55) protrude inwards. 3. intake air filter according to claim 2, characterized in that the end wall (51) of the sealing ring (50) in the Area of each locking cam (55) has a slot (56), the clear width (w) of which in the circumferential direction at least the length (1) and its width (b) at least the radial depth (t) of the locking cam (55) is equivalent to. -2- L .J C · ♦ * 1984 file Γ., - Π 4. intake air filter according to claim 1 to 3, characterized in that that the nut (46) on the end face (60) facing the collar (61) has a Zentrxeransatz (62) which penetrates the metal disc (47) with radial play and the sealing ring (50) in a radially sealed manner. 10 L - ³ "_J