WO2020126455A1

WO2020126455A1 - Cover unit

Info

Publication number: WO2020126455A1
Application number: PCT/EP2019/083418
Authority: WO
Inventors: Ulf JANSSENS; Torsten STIFEL; Armin Ehni; Thomas Semmler; Fabian Schmid
Original assignee: Elringklinger Ag
Priority date: 2018-12-21
Filing date: 2019-12-03
Publication date: 2020-06-25
Also published as: DE102018133460A1

Abstract

In order to improve a cover unit for a component to be covered, particularly for a motor or engine casing, the cover unit comprising a plurality of cover elements and several or all of the plurality of cover elements comprising at least one part each requiring precision, each cover element is arranged on at least one other cover element with play when mounted and the cover elements are sealed off from one another.

Description

COVER UNIT

The invention relates to a cover unit for a component to be covered.

In particular, the component to be covered is a motor housing.

For example, the cover unit is provided for an internal combustion engine. The cover unit in the internal combustion engine, for example, covers it in the region of the cylinder head and is in particular designed as a cylinder head cover.

The cover unit is provided in particular to cover parts of the component to be covered.

In particular, the cover unit partially covers the component to be covered in an assembled state.

In particular, the cover unit is firmly mounted on the component to be covered in the assembled state.

With such cover units, the problem arises that the

Cover unit should be inexpensive to manufacture and should be easy to install on the component to be covered. For example, the

Cover unit also have a light weight.

In particular, precision requirements must also be met for one cover unit.

The invention is therefore based on the object of improving a cover unit of the generic type, in particular with regard to at least one of the problems mentioned above. According to the invention, this object is achieved as follows with a cover unit of the type mentioned at the outset.

The cover unit comprises a plurality of cover elements, each of the cover elements being arranged on at least one other cover element at least in an assembled state with play and the cover elements being sealed off from one another.

In particular, several of the cover elements each comprise at least one part requiring precision. In some embodiments, it is provided that all of the covering elements each comprise at least one part that requires precision.

For example, a cover element includes exactly one precision

requiring part. In particular, it is provided that several, in particular all, of the cover elements each comprise exactly one part that requires precision.

In some preferred embodiments it is provided that a

Cover element comprises several precision-requiring parts. For example, several, in particular all, of the cover elements comprise several parts requiring precision.

In particular, it is provided in some embodiments that a

Cover element or a plurality of cover elements comprises / comprise exactly one precision-requiring part and a cover element or a plurality of cover elements comprises / comprise several precision-requiring parts.

Parts that require precision are, in particular, parts of the

To understand cover elements, which in the assembled state must be aligned in a precise position relative to the component to be covered and must be mounted thereon. In particular, at least one part requiring precision must be precise

getting produced. For example, at least one part requiring precision must be manufactured with high accuracy.

In particular, the tolerances allowed are extremely small for at least one part requiring precision.

For example, the precision parts require the several

Cover elements to meet essentially the same precision requirements.

In other embodiments, different precision requirements must be met with regard to the parts requiring precision.

One of the advantages of the invention is that the several

Cover elements can each be designed according to their requirements and are designed differently, for example.

Due to the fact that the cover elements are arranged with play in the assembled state, they can be attached to the

component to be covered are still crazy within their respective game. The individual cover elements can thus be manufactured with greater tolerances, so that the manufacturing process becomes more cost-effective.

In addition, the respective parts requiring precision can be attached to the

Cover elements during assembly can still be moved within the game, so that the assembly is made easier with regard to the precision-requiring parts, since these can be aligned precisely with the component to be covered, regardless of the precision-requiring parts of the other cover elements, since the respective cover elements can be moved with respect to one another and with play can be aligned with it. In addition, when designing the cover unit from a plurality of cover elements, an over-definition in the arrangement of the cover unit on the component to be covered, for example with regard to the precise arrangement of the plurality of parts requiring precision, can be avoided, since the individual cover elements are each individually at least within their intended relative to the component to be covered Game can be aligned.

Another advantage can be seen in the fact that the cover elements are sealed against one another and thus the plurality of cover elements form a common cover, which also seals, for the component to be covered.

With regard to the sealing of the cover elements against one another, no further details have so far been given.

In particular, it is provided that at least one cover element has at least one sealing section.

For example, exactly one cover element comprises exactly one

Sealing section or several sealing sections.

Preferably, several, for example all, of the plurality of cover elements each comprise exactly one sealing section or several sealing sections.

The following explanations regarding features "of the sealing section" and "of the cover element" which has this are to be understood such that in at least one, for example exactly one,

Sealing section the corresponding feature is provided. In preferred embodiments, several, for example all, of the sealing sections have the corresponding feature. The sealing section is provided in particular for sealing against another cover element. The corresponding are in the assembled state and in particular also in the assembled state

Cover elements on the sealing section are arranged sealingly to one another.

For example, the sealing section essentially surrounds the cover element, for example along an edge contour thereof.

In particular, it is provided that at least two cover elements are sealed off from one another along a sealing surface.

Each of the cover elements preferably has one or more sealing surfaces, on which this cover element is sealed off from a further cover element.

It is preferred if the one sealing surface, in particular several, for example all, of the sealing surfaces has / have one or more of the features mentioned below.

It is particularly expedient if the sealing section of at least one cover element has the sealing surface of this cover element.

In particularly preferred embodiments, several, for example all, of the sealing sections each have a respective one

Sealing surface.

It is preferred if the sealing section is wider than the sealing surface, in particular at least approximately perpendicular to a direction in which the sealing section and the sealing surface run. In particular, the sealing section is wider, preferably at least approximately perpendicular, to a sealing pressing direction

formed as the sealing surface.

The sealing section thus provides a wider area than is necessary for the sealing itself. Thus, the cover elements can be moved against each other at least within their intended play and the respective sealing section provides a surface opposite the other cover element, which serves as a sealing surface.

This ensures a secure seal between the cover elements even when the cover elements move within their play.

It is preferably provided that all sealing surfaces run along corresponding sealing sections of the cover elements.

Preferably, all of the sealing sections are at least approximately wider than their respective sealing surfaces perpendicular to the direction of travel.

In particularly advantageous embodiments, it is provided that the sealing surfaces of at least one cover element for the most part run at least approximately in a geometric sealing plane.

It is particularly favorable if, in the case of all cover elements, their respective sealing surfaces largely run at least approximately in a respective geometric sealing plane. A plurality of sealing surfaces are preferably oriented essentially identically. It is particularly preferred if the sealing surfaces mostly have the same orientation. In particularly favorable execution forms it is provided that all sealing surfaces are the same

Have orientation.

In particular, surfaces are oriented identically, in which their normals run at least approximately parallel to one another.

An advantage of at least largely identical oriented sealing surfaces can be seen in the fact that when the cover unit is installed,

Sealing in most of the sealing surfaces, preferably in all sealing surfaces, it must be acted upon in at least approximately the same direction, in particular in the same sealing press direction. In addition, the sealing is improved by an at least approximately the same sealing pressing direction.

It is particularly favorable if the geometric sealing planes of a plurality of cover elements, for example the geometric sealing planes of a large part of the cover elements, run at least approximately parallel to one another. The geometric sealing planes of all cover elements preferably run at least approximately parallel to one another.

The sealing surfaces, which at least for the most part run in at least approximately parallel geometric sealing planes, thus simplify the assembly of the cover unit and result in a more reliable sealing, since essentially a sealing pressing direction has to be acted upon. In particularly advantageous embodiments, it is provided that the cover unit comprises a base cover element.

In particular, it is provided that at least a large part of the other cover elements, for example all other cover elements, are arranged with play on the base cover element.

Thus, in particular, an easy-to-install cover unit can be provided, since at least a large part of the cover elements can only be arranged on a further cover element, namely the basic cover element.

It is preferably provided that the base cover element is a

Struts.

In particular, a simpler assembly of the basic cover element is made possible with the strut.

In particular, the strut is formed from a plurality of sealing sections.

The strut preferably has a plurality of sealing surfaces of the basic cover element.

For example, the strut has all the sealing surfaces of the basic cover element.

With regard to the further configuration of the cover elements, no further details have so far been given. In particular, it is provided that at least one cover element comprises an edge section. It is preferably provided that all

Cover elements each include a respective edge section.

In particular, the edge section runs or the edge sections run along a respective geometric edge contour.

In particular, the geometric edge contour essentially runs in a geometric edge plane. The edge section also advantageously runs essentially in the geometric edge plane. This simplifies the assembly of the cover unit, since the cover element with the edge section running essentially in the edge plane is easier to install.

In particular, it is provided that the cover elements

Cover part. The cover part essentially serves to cover the component to be covered.

In particular, the cover part runs essentially in one

geometric cover area.

Thus, in particular, the cover element covers the component to be covered in the area of the cover surface.

For example, the cover surface of a cover element is surrounded by its edge contour.

In particular, the cover element extends essentially in its cover surface.

For example, a cover element is an essentially planar cover element. Preferably, several cover elements, for example all of the cover elements, are essentially planar.

In particular, the base cover element is an essentially planar cover element.

In this case, it is particularly provided that the cover surface of an essentially planar cover element essentially runs in a geometrical plane.

A plurality of essentially planar cover elements provides, in particular, a compact cover unit which, although it consists of several cover elements, does not require too much installation space.

Another advantage can be seen in the fact that several essentially planar cover elements are easier to assemble.

In particular, the geometric edge plane and the geometric plane in which the cover surface extends at least approximately coincide.

In some embodiments, it is provided that the cover unit covers a cover space.

In particular, it is provided that a cover element arches over the cover space. For example, it can be provided that a plurality of cover elements arch over the cover space.

In particular, the bulging over the cover space

Cover elements whose cover surface is curved. In particular, the cover surface of the cover element arching over the cover space at least partially forms a geometric interface of the cover space.

In some preferred embodiments it is provided that in at least one cover element the edge section has the sealing surface. For example, with several cover elements, the edge section has the sealing surface.

In particular, it is provided in some cover elements that the edge section forms the sealing section.

No details have so far been given regarding the material of the cover elements.

The cover elements can be made from a wide variety of materials.

In preferred embodiments it is provided that a cover element comprises plastic, in particular is made of plastic.

It is preferably provided that several, for example all, of the cover elements comprise plastic, in particular are made of plastic.

It is particularly preferred if the plastic is a fiber-reinforced plastic.

This provides cover elements which can be produced inexpensively and are light in weight. Larger manufacturing tolerances in the manufacture of plastic are compensated for by the formation of the cover unit from several cover elements as described above.

In some advantageous embodiments it is provided that a

Cover element comprises a metal, for example several cover elements comprise a metal. In particular, this is a cover element or the plurality of cover elements are made of metal.

A wide variety of metals and / or alloys can be used. In particularly favorable embodiments, the metal is

Aluminum.

In some preferred embodiments, it is provided that exactly one cover element is designed as a supporting element. With some

Embodiments provide that several cover elements are designed as load-bearing elements.

In particular, the cover element designed as a supporting element is provided in order to carry a force-transmitting element.

For example, the force-transmitting element is a shaft, for example a drive shaft. In particular, it is provided that the shaft extends through the supporting element. The load-bearing element must stabilize the shaft and therefore hold it load-bearing.

With regard to the further configuration of the arrangement of the cover elements to one another, no further details have so far been given.

It is particularly expedient if a plurality of cover elements are arranged adjacent to one another. In some preferred embodiments it is provided that at least one cover element has a receptacle for another cover element.

For example, the receptacle is provided for the cover element designed as a supporting element.

For example, the receptacle forms a socket for the other cover element.

In particular, the cover element received by the receptacle is encompassed by a receiving section of the receptacle.

It when the cover surface of the received cover element is at least approximately parallel to the sealing press direction is particularly advantageous.

In particularly favorable embodiments, it is provided that at least one latching device is provided for cover elements.

In particular, at least two cover elements can be latched to one another by means of the latching device. This means that the snap-on cover elements are easy to position and assemble with each other.

In addition, the latched cover elements in particular are connected to one another and the cover unit can be assembled more easily since individual elements do not have to be installed, but cover elements connected to one another are to be installed.

The cover elements can preferably be latched with play with the latching device, so that the latched elements are connected and can nevertheless be moved relative to one another with play. In particular, in the assembled state and in the assembled state, the cover elements to be snapped into place are snapped into place.

It is preferably provided that a tolerance gap is provided between at least two cover elements, at least in the installed state.

Thus, the at least two cover elements can still be moved during assembly, at least within a free space given by the tolerance gap, and in particular the parts of these cover elements which require precision can be moved precisely to the component to be covered

align.

For example, the tolerance gap between at least two cover elements is also provided in the assembled state.

It is particularly expedient if the tolerance gap or one of the several tolerance gaps is provided between two cover elements which are arranged next to one another and have different coefficients of thermal expansion.

In particular, the tolerance gap affects the two

Cover elements in the event of a temperature change, since their expansion behavior under different temperature changes in

Is essentially compensated for by the tolerance gap.

It is particularly favorable if the tolerance gap between the respective

Sealing surfaces of the cover elements runs.

For example, a sealing element is arranged in the tolerance gap and so the cover elements are arranged sealingly against one another despite the tolerance gap. For example, it is provided that the tolerance gap essentially runs at least in sections along the edge contour of the corresponding cover element.

With regard to the arrangement of the cover unit and the cover elements on the component to be covered, no further details have so far been given.

In particular, fastening means are provided for fastening the cover unit to the component to be covered.

In particular, the fastening means are provided in order to fasten a cover element to the component to be covered.

For example, it is provided that the further cover elements are pressed between the cover element fastened with the fastening means and the component to be covered.

In preferred embodiments, however, it is provided that fastening means for fastening to the cover element

component to be covered are provided. In particular, in the assembled state, all cover elements are provided for them

Fasteners attached to the component to be covered.

It is preferably provided that the cover elements are attached directly to the component to be covered.

Thus, an indirect attachment of a cover element, for example, to another cover element and via this to the

component to be covered avoided. Thus, the individual cover elements can preferably be attached individually to the component to be covered, and the advantage that the cover elements can be moved with respect to one another is particularly advantageous during assembly.

It when the cover element has a fastening recess or a plurality of fastening recesses is particularly favorable. In this case, other cover elements can be fastened to the fastening recess directly on the component to be covered without the displaceability of the cover element having the fastening recess being impaired.

For example, several cover elements have a fastening recess or several fastening recesses.

In particular, the fastening recess or the fastening recesses for one fastener or several fasteners, in particular another cover element, are provided.

In particular, it is provided that one fastening means in one or more fastening recesses

Fastening recesses reach through with play. So that applies

Fasteners in the fastening recess on the other

Cover element passing by and can be attached to the component to be covered without impairing the other cover element in its play.

It is preferably provided that a plurality of fastening means reach through in one or more fastening recesses.

For example, the fastening means of other cover elements could reach through between the individual sections of the strut. It is particularly expedient if the fastening means each

Apply cover element.

A press-on pressure is preferably generated by the fastening means at least on the sealing surfaces of the respective cover element.

Thus, several, in particular all, of the fastening means generate a contact pressure.

It is particularly advantageous if the contact pressure of the several, in particular at least a large part, for example all, of the fastening means acts at least approximately in the same sealing press direction.

Thus, a reliable seal is preferably effected because the

Sealing essentially takes place in only the sealing pressing direction and the fastening means generate a contact pressure in this sealing pressing direction.

Assembly is also simplified since there is no application in several

Directions has to be made.

In preferred embodiments it is provided that the cover element designed as a load-bearing element can be connected to the component to be covered without play and in particular can be fastened to the component to be covered without play.

It is particularly provided that in the assembled state the cover element designed as a load-bearing element is connected to the component to be covered without play and in particular is fastened to it without play. For example, the cover element, which is designed as a load-bearing element, is hard-bolted to the component to be covered.

Thus preferably form that designed as a supporting element

Cover element and the component to be covered a stable and firmly connected unit, in which in particular large forces can be transmitted.

With regard to the design of the cover unit for sealing against the component to be covered, no further details have so far been given.

In particular, it is provided that the cover unit comprises a cover sealing surface for sealing the cover unit from the component to be covered.

The cover sealing surface can have different shapes.

It is particularly preferred if the cover sealing surface extends at least for the most part at least approximately in a geometric cover sealing plane.

Thus, in particular, the cover sealing surface is essentially flat and in one plane, so that the cover unit can be easily mounted on the component to be covered and one

reliable sealing can be provided, since essentially only in the cover sealing plane is to be sealed.

In particular, it is provided that the cover sealing surface runs along a cover sealing section. For example, the cover sealing section extends at least partially along one or more corresponding edge sections of one or more cover elements.

It is preferably provided that the cover sealing section is at least approximately perpendicular to a direction along which the cover sealing section and the cover

sealing surface run, is wider than the cover sealing surface.

In particular, the cover sealing section is designed to be wider, in particular at least approximately perpendicular, to the sealing pressing direction than the cover sealing surface.

In some preferred embodiments, it is provided that exactly one cover element, for example the base cover element, has the entire cover sealing surface.

This enables simple and reliable sealing, since the component to be covered can only be sealed against a cover element.

In addition, the assembly is made easier, since then essentially only the one covering element has to be placed directly on the component to be covered.

For example, it is provided that the cover sealing level runs at least approximately parallel to a geometric cover element level of the exactly one cover element. For example, the cover sealing plane runs at least approximately parallel to the cover surface of the exactly one cover element. In other advantageous embodiments it is provided that the

Cover sealing surface is formed by several cover elements. It is preferably provided that the cover sealing surface is formed by exactly two cover elements.

Here, the seal and the cover sealing surface

can be varied and adapted in accordance with local requirements, for example on the component to be covered, by appropriately adapting the cover elements.

It is further preferred that at least one as a load-bearing element

formed cover element at least a portion of the

Has cover sealing surface.

For example, the load-bearing element is thus connected directly to the component to be covered, and sealing is carried out on the section of the cover sealing surface between the cover element designed as a load-bearing element and the component to be covered.

With regard to the sealing itself, no further detailed information has yet been given.

In particular, it is provided that the cover unit comprises at least one sealing element for sealing between at least two cover elements.

In particular, it is provided that a sealing element is arranged between two cover elements to be sealed against each other. It is preferably provided that the one or more sealing elements are acted upon by the cover elements and / or by means of the fastening means, at least approximately in the same sealing pressing direction.

In particular, the sealing element is arranged in the assembled state and in the assembled state between two corresponding sealing surfaces and is pressed, for example, between them. The plurality of sealing elements are preferably arranged between respective sealing surfaces and in particular are pressed between them.

It is preferably provided that the cover unit comprises a sealing element for the seal between the cover unit and the component to be covered.

It when the sealing element is arranged on the cover sealing surface is particularly favorable.

In the assembled state, the sealing element is preferably pressed between the cover unit and the component to be covered.

In some embodiments, it is provided that the plurality of sealing elements are provided as individual pieces.

In particularly preferred embodiments, it is provided that a plurality of sealing elements are formed in one piece as a sealing unit element.

This makes assembly easier, as it is tolerably a one-piece seal

unit element is to be assembled. In addition, a more reliable seal is made possible by means of a one-piece sealing unit element. For example, all sealing elements, which are provided for sealing between cover elements, are designed as a one-piece sealing unit element.

It is particularly preferred if the sealing unit element also comprises the sealing element for the seal between the cover unit and the component to be covered.

For example, all sealing elements which are provided for the sealing between the covering elements and for the sealing between the covering unit and the component to be covered are designed as a one-piece sealing unit element.

In some preferred embodiments it is provided that the

Sealing unit comprises exactly one sealing unit element.

In particularly advantageous embodiments, it is provided that at least one cover element has a groove.

In particular, the groove is provided for a sealing element.

For example, the sealing element sealing the cover element is at least partially arranged in the groove. In this way, the sealing element is preferably held in the groove in the correct position, thus simplifying assembly.

In particular, a groove bottom of the groove forms at least a portion of the sealing surface of the cover element.

In particular, the groove is arranged at least in sections on the sealing section of the cover element. In some preferred embodiments, the groove is additionally or alternatively provided as a guide for another cover element to be arranged on the cover element. For example, the other cover element partially engages in the groove and is guided by it. An arrangement of the cover elements on one another is thus preferably made possible.

The groove is in particular dimensioned such that the other cover element engages with play in this groove.

It is preferably provided that at least the cover element having the receptacle and / or the one accommodated in the receptacle

Cover element has / have a groove.

This groove is particularly for the inclusion of between

Cover elements arranged sealing element provided.

It is preferred if the groove when receiving as a guide for the

Cover element is used.

It is particularly advantageous if at least one sealing element seals at least one tolerance gap.

This creates a free space between the cover elements through the tolerance gap so that they are arranged next to one another with play, and at the same time the free space is sealed by the sealing element.

The sealing elements can be made from a wide variety of materials.

For example, sealing elements made of an essentially liquid, in particular viscous, sealing agent could be used. In preferred embodiments it is provided that one sealing element, in particular several, preferably all, of the sealing elements is / are elastic.

In this case, the elastically designed sealing element can preferably adapt to a displacement of the cover elements, and so a reliable seal is provided even if the cover elements are still displaced for precise alignment during assembly.

For example, a sealing element comprises and is an elastomer

in particular made of an elastomer. It is particularly preferred if a plurality of sealing elements, for example all sealing elements, comprise an elastomer, in particular are formed from an elastomer.

No details have so far been given with regard to the design of the parts requiring precision.

Insofar as features "of the precision-requiring part" are mentioned below, it is to be understood that a precision-requiring part of a cover element or a plurality of precision-requiring parts, for example all parts requiring precision, this feature

has / have.

In some embodiments it is provided that the part requiring precision is a separate part to be arranged, for example fastened, on the cover element.

In some preferred embodiments it is provided that the precision-requiring part is formed in one piece with the rest of the cover element which has this precision-requiring part. Thus, in particular, not only the precision-requiring part but the entire cover element must be precisely aligned with and fastened to the component to be covered.

In particular, the cover element is at least partially to be manufactured with strict tolerance requirements.

For example, the part requiring precision is part of a control device or is provided as part of a control device and is designed in this way.

In particular, it is provided that the part requiring precision is a passage for a shaft.

This includes a precise design of the passage and a precise alignment of the passage relative to the component to be covered

required so that the shaft can properly reach through the passage and properly function with as little as possible

Friction losses in the passage can meet.

For example, the shaft is a drive shaft.

The passage is in particular a passage in a cover element designed as a load-bearing element, so that the load-bearing element can stably support the drive shaft.

In particular, it is provided that one or more parts requiring precision is / are a passage for a control shaft. Precise shaft support is also necessary here.

For example, the control shaft is a camshaft. For example, it is provided in some embodiments that control elements are still arranged in the part requiring precision, in particular in the passage. For example, the control elements are camshaft adjusters.

In some embodiments, attachment points, in particular for the attachment means, and / or the attachment means themselves, are also a precision-requiring part of the cover element. It is

Position the cover element precisely on the component to be covered, so that the fastening points must be precisely aligned.

In particular, it is provided that in the case of a cover element which has a fastening point and / or a fastening means as the part requiring precision, this cover element also comprises at least one further part requiring precision.

In particular, it is provided that a tolerance accuracy of up to ± 0.5 mm, in particular of up to 0.2 mm, must be maintained for at least one part requiring precision.

This means that, in particular, the precision part must be aligned and / or manufactured in which the deviations must not be greater than up to ± 0.5 mm, preferably not greater than ± 0.2 mm.

In particular, a tolerance accuracy of up to ± 0.5 mm, in particular of up to ± 0.2 mm, must be maintained in the case of several, for example all, precision parts.

For example, the passageway must be manufactured with the above-mentioned tolerance accuracy. In particular, this is the part requiring precision, in particular those are

parts requiring precision, with the above-mentioned tolerance accuracy to be mounted on the component to be covered.

In particular, the tolerance accuracy affects both the manufacture and the alignment of the part requiring precision

parts requiring precision.

With regard to further elements of the cover unit, no further details have yet been given.

For example, in some embodiments, the cover unit has other elements for additional functions.

For example, the cover unit includes a holding element.

In particular, the holding element is provided for holding the component to be covered, for example on a frame.

In particular, the holding element is a suspension for the component to be covered.

In some preferred embodiments, the holding element is a motor suspension for the motor to be covered with the cover unit.

In particular, the holding element comprises metal and is in particular made of metal. A stable holding element is thus provided which can hold the component to be covered stably and firmly.

It is preferably provided that the holding element can be fastened to the component to be covered and in particular can be fastened directly to the component to be covered. Thus, the holding element can be connected directly to the component and attached to it, so that a stable holder is given.

In particular, it is provided that in the assembled state, the holding element is attached to the component to be covered, and in particular is attached directly to it.

For example, it is provided that part of the holding element or fastening means provided for fastening the holding element reach through one fastening recess or a plurality of fastening recesses. Thus, in particular, the holding element can be directly fastened directly to the component to be covered and by reaching through the fastening recess, an arrangement of the corresponding is

Covering element and moving the same within its play by the attachment of the holding element is not affected.

Another aspect of the invention relates to a housing.

In this aspect, the problem corresponds to the problem mentioned at the beginning.

It is provided according to the invention that the housing comprises a cover unit with one or more of the features mentioned above.

The advantages, which are mentioned above for the features, are transferred to the housing.

The invention further relates to a component to be covered.

With regard to the covering, the component to be covered has a task corresponding to the type mentioned at the beginning. According to the invention, the object is achieved in that the component to be covered comprises a covering unit with one or more of the features mentioned above and in particular one

Cover unit at least partially covers the component to be covered.

The advantages mentioned above are transferred accordingly to the component to be covered with the cover unit.

In particular, this aspect of the invention relates to an engine, for example an internal combustion engine for motor vehicles.

The engine must be covered at least partially, in particular with a cover unit.

For example, the engine must be covered in the area of the cylinder head.

According to the invention, the motor comprises a cover unit with one or more of the features mentioned above. The advantages mentioned above are transferred accordingly to the engine.

For example, the motor comprises a motor housing with a cover unit with one or more of the features mentioned above.

For example, the cover unit for the engine is designed as a cylinder head cover.

Above and below, the phrase “at least approximately” is to be understood to mean that deviations from the specified value or the specified relation, which are not technically relevant or due to technical reasons, are also included. For example, if "at least approximately"

Deviations of up to ± 15%, preferably of up to ± 10%, in particular of ± 5%, for example of up to ± 2%, from the

specified value or the specified relation with.

When specifying that two directions and / or planes at least

are approximately parallel to one another and / or at least approximately run in the same direction, in particular deviations of up to ± 15 °, preferably of up to ± 10 °, for example of up to ± 5 ° from the parallelism or the same direction are also included.

In particular, the term "for the most part" is to be understood to mean that the technically relevant largest part of the quantity specified is

has the corresponding characteristic.

For example, the term "for the most part" is to be understood to mean that at least 80%, preferably at least 90%, in particular at least 95% and for example at least approximately 100% of the amount mentioned have the corresponding feature.

The above description of solutions according to the invention thus includes in particular the various combinations of features defined by the following numbered embodiments:

1. cover unit (100) for a component to be covered (120),

in particular for a motor housing, wherein the cover unit (100) comprises a plurality of cover elements (112), wherein several or all of the plurality of cover elements (112) each comprise at least one part (116) requiring precision, and each of the cover elements (112) in each case at least another cover element (112) is arranged with play at least in an assembled state and the cover elements (112) are sealed against one another. 2. Cover unit (100) according to embodiment 1, characterized in that at least one cover element (112), in particular all of the cover elements (112) in each case, at least one

Sealing section (172), which is provided for sealing against another cover element (112).

3. Cover unit (100) according to one of the preceding embodiments, characterized in that at least two cover elements (112) are sealed against one another along a sealing surface (174).

4. Cover unit (100) according to one of the preceding embodiments, characterized in that the sealing section (172) of at least one cover element (112) has the sealing surface (174) of this sealing element (112), and in particular that the sealing section (172) is transverse a direction in which the sealing section (172) and the sealing surface (174) run is wider than the sealing surface (174).

5. Cover unit (100) according to one of the preceding embodiments, characterized in that all sealing surfaces (174) run along corresponding sealing sections (172) of the cover elements (112), in particular the respective sealing sections (172) transverse to the direction of travel are wider than the sealing surfaces (174).

6. The cover unit (100) according to one of the preceding embodiments, characterized in that the sealing surfaces (174) of at least one cover element (112) largely run at least approximately in a geometric sealing plane,

in particular that in the case of all cover elements (112) their respective sealing surfaces (174) largely run at least approximately in a respective geometric sealing plane. 7. Cover unit (100) according to one of the preceding embodiments, characterized in that the geometric sealing planes of a plurality of cover elements (112), in particular all cover elements (112), run at least approximately parallel to one another.

8. Cover unit (100) according to one of the preceding embodiments, characterized in that the cover unit (100) comprises a base cover element (342), in particular on the base cover element (342) at least a large part of the other cover elements (112), in particular all other cover elements (112) are arranged with play.

9. Cover unit (100) according to one of the preceding embodiments, characterized in that the base cover element (342) has a strut (346), which in particular consists of several

Sealing sections (172) is formed, and in particular the

Bracing (346) comprises a plurality of sealing surfaces (174), in particular all sealing surfaces (174) of the basic cover element (342).

10. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) comprises an edge section (132), in particular all

Cover elements (112) each comprise a respective edge section (132), the respective edge section (132) along a

geometric edge contour (134) runs.

11. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112), in particular all cover elements (112), comprise a cover part, in particular a respective cover part extending in a respective cover surface. 12. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) extends essentially in a geometric plane, in particular its cover surface (136) running essentially in the geometric plane.

13. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) arches over a cover space (126), in particular its cover surface (136) at least partially having a geometric boundary surface of the cover space (126) trains.

14. Cover unit (100) according to one of the preceding embodiments, characterized in that in at least one cover element (112) the edge section (132) has the sealing surface (174), in particular the edge section (132) forms the sealing section (172).

15. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) comprises plastic, in particular is made of plastic.

16. Cover unit (100) according to one of the preceding embodiments, characterized in that all cover elements (112) comprise plastic, in particular are made of plastic.

17. A cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) comprises a metal, in particular is formed from a metal, the metal in particular being aluminum. 18. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) is designed as a load-bearing element (218).

19. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) has a receptacle (142) for another cover element (112), in particular for the cover element (112) designed as a load-bearing element (218) ), having.

20. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one latching device is provided, by means of which at least two cover elements (112) can be latched to one another, in particular are latched.

21. Cover unit (100) according to one of the preceding embodiments, characterized in that a tolerance gap (152) is provided at least in the assembled state, in particular also in the assembled state, between at least two cover elements (112).

22. Cover unit (100) according to the preceding embodiment, characterized in that a tolerance gap (152) is provided at least between two cover elements (112) which are arranged against one another and have different temperature expansion coefficients.

23. Cover unit (100) according to one of the preceding embodiments, characterized in that the tolerance gap (152) extends between respective sealing surfaces (174) of the cover elements (112).

24. Cover unit (100) according to one of the preceding embodiments, characterized in that the tolerance gap (152) at least in sections along the edge contour (134) of the corresponding one

Cover element (112) runs. 25. Cover unit (100) according to one of the preceding embodiments, characterized in that fastening means (212), in particular for at least one cover element (112), are provided for fastening the cover unit (100) to the component (120) to be covered.

26. Cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) has at least one fastening recess (214), in particular several fastening recesses (214), for one fastening means (212) or several fastening means (212) .

27. Cover unit (100) according to one of the preceding embodiments, characterized in that one fastening means (212), in particular a plurality of fastening means (212), in each case

Fastening recess (214) or with several respective fastening recesses (214) passes through / reach through with play.

28. Cover unit (100) according to one of the preceding embodiments, characterized in that a plurality of fastening means (212) generate a contact pressure, the contact pressure in particular of at least a large part of the fastening means (212) acting at least approximately in the same sealing pressing direction (178).

29. Cover unit (100) according to one of the preceding embodiments, characterized in that the cover element (112) designed as a load-bearing element (218) can be connected without play to the component (120) to be covered and, in particular, is connected without play in the assembled state, in particular is screwed hard. 30. Form the cover unit (100) according to one of the preceding embodiments, characterized in that the cover unit (100) comprises a cover sealing surface (222) for sealing the cover unit (100) with respect to the component (120) to be covered.

31. Cover unit (100) according to the preceding embodiment, characterized in that the cover sealing surface (222) for the most part runs at least approximately in a geometric cover sealing plane.

32. Form the cover unit (100) according to one of the preceding embodiments, characterized in that the cover sealing surface (222) runs along a cover sealing section (226), and in particular the cover sealing section (226) transversely to a direction of travel along which the cover sealing section (226) and the cover sealing surface (222) is wider than the cover sealing surface (222).

33. Cover unit (100) according to one of the preceding embodiments, characterized in that exactly one cover element (112), in particular the base cover element (342), has the entire cover sealing surface (222), in particular the cover sealing plane being at least approximately parallel to one Cover element level runs.

34. Cover unit (100) according to one of the preceding embodiments, characterized in that the cover sealing surface (222) is formed by a plurality of cover elements (112), in particular by exactly two cover elements (112). 35. Forming the cover unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) designed as a load-bearing element has at least a portion of the cover sealing surface (222).

36. Cover unit (100) according to one of the preceding embodiments, characterized in that the cover unit (100) has at least one sealing element (162) for sealing between at least two

Cover elements (112) comprises.

37. Cover unit (100) according to one of the preceding embodiments, characterized in that a sealing element (162) is arranged in each case between two cover elements (112) to be sealed against one another.

38. cover unit (100) according to one of the preceding embodiment, characterized in that the cover unit (100)

Sealing element (232) for sealing between the cover unit (100) and the component (120) to be covered.

39. Form the cover unit (100) according to one of the preceding embodiments, characterized in that a plurality of sealing elements (162, 232) are integrally formed as a sealing unit element (242), in particular that all sealing elements (162, 232) are integrally formed, and in particular that Cover unit (100) exactly one seal

comprises unit element (242).

40. Forming the sealing unit (100) according to one of the preceding embodiments, characterized in that at least one cover element (112) has a groove (168) for a sealing element (162), in particular a groove bottom forming at least a section of a sealing surface (174). 41. Sealing unit (100) according to one of the preceding embodiments, characterized in that at least the cover element (212) having the receptacle (142) and / or the cover element (212) accommodated in the receptacle (142) has a groove (168) for have the sealing element (162) arranged between them.

42. Form the cover unit (100) according to one of the preceding embodiments, characterized in that at least one sealing element (162) seals at least one tolerance gap (152).

43. Form the cover unit (100) according to one of the preceding embodiments, characterized in that at least one sealing element (162, 232) comprises an elastomer, in particular is formed from an elastomer.

44. Form the cover unit (100) according to one of the preceding embodiments, characterized in that the precision-requiring part (116) of at least one cover element (112) is formed in one piece with the rest of the cover element (112), in particular a precision-requiring part (116) for all of them. having covering elements (112) this is formed in one piece with the rest of the corresponding covering element (112).

45. Cover unit (100) according to one of the preceding embodiments, characterized in that, in the case of at least one cover element (112), the part (116) requiring precision has a passage (252), in particular for a shaft, in particular a drive shaft and / or a control shaft, is. 46. Cover unit (100) according to one of the preceding embodiments, characterized in that with at least one part (116) requiring precision, a tolerance accuracy of up to ± 0.5 mm, in particular up to ± 0.2 mm, must be observed.

47. Form the cover unit (100) according to one of the preceding embodiments, characterized in that the cover unit (100) comprises a holding element (352), in particular made of metal.

48. Cover unit (100) according to the preceding embodiment, characterized in that the holding element (352) can be fastened directly to the component (120) to be covered and, in particular in the assembled state, is fastened directly to it.

49. Housing, in particular motor housing, characterized in that this is a cover unit (100) according to one of the preceding

Embodiments includes.

50. Motor, in particular internal combustion engine for motor vehicles, characterized in that it comprises a cover unit (100) according to one of the preceding embodiments.

Further preferred features and advantages of the invention are the subject of the drawing and the following description of some exemplary embodiments.

The drawing shows:

1 shows an exploded view of a component to be covered and a cover unit partially covering this component according to a first exemplary embodiment; FIG. 2 shows an enlarged illustration according to FIG. 1;

Fig. 3 is a partial perspective view of a cover

element with a receptacle for a further cover element, an inner side of the cover element facing a cover space being shown;

4 shows a cover element which is provided for being received in the receptacle and which is designed as a supporting element;

Fig. 5 is a plan view of the cover unit and that to be covered

Component according to FIG. 1;

Figure 6 shows a section as shown in Figure 5, through the cover unit and the component to be covered.

Fig. 7 is a fragmentary enlarged view of the VII

designated area in section of Fig. 6;

Fig. 8 is an illustration similar to Fig. 3, wherein the cover member

4 is included in the recording;

9 shows a detail of a sealing unit element comprising a plurality of sealing elements;

10 shows a perspective illustration of a cover unit according to a second exemplary embodiment;

11 is an exploded view of the cover unit according to the

second embodiment;

Fig. 12 is a cover member according to the second embodiment and Fig. 13 shows a base cover member according to the second embodiment example.

A first exemplary embodiment of one designated as a whole by 100

Cover unit comprises a plurality of cover elements 112, namely two cover elements 112a and 112b. In addition, the cover unit 100 includes a sealing system, generally designated 114.

The exemplary embodiment is shown by way of example in FIGS. 1 to 9.

Above and below, elements with at least the fundamentally identical function are assigned the same reference symbols and described together. If a feature of exactly one of these elements is described with essentially the same function or from others

For the sake of referring to exactly one of these elements with essentially the same function, a letter identifying exactly this element is appended to the same reference symbol.

The cover unit 100 is provided for covering and in particular for sealing a component 120 to be covered.

In a state assembled with the component 120 to be covered, the cover unit 100 is fixedly mounted on the component 120 and seals at the intended locations.

In particular, the component 120 to be covered is an internal combustion engine.

For example, the cover unit 100 is provided to cover and seal the internal combustion engine on the cylinder head. In particular, the cover elements 112a and 112b each comprise at least one precision-requiring part 116. The precision-requiring parts 116 are, for example, to be precisely aligned with the component 120 to be covered and to be arranged precisely with the component 120 thereon.

The cover element 112a bulges substantially over one

Coverage space 126.

In particular, a part of the component 120 to be covered protrudes into the cover space 126 in the assembled state.

The cover element 112a has an edge section 132a, which essentially runs along a geometric edge contour 134a (FIG. 3).

The edge contour 134 is a closed contour and delimits a geometric cover surface 136, in which the cover element 112 essentially extends.

In the case of the cover element 112a arching over the cover space 126, the cover surface 136 is curved and essentially forms a boundary surface of the cover space 126.

The cover element 112 thus extends substantially within the edge contour 134 to the edge contour 134.

The cover element 112b also has an edge section 132b which runs along a corresponding geometric edge contour 134b (FIG. 4). The edge contour 134b is a closed contour which borders a covering surface 136b. The cover member 112b extends in the

Essentially in cover area 136b.

The cover element 112b is essentially designed as a planar cover element 112, with its cover surface 136b in the

Runs essentially in a geometric plane.

In this exemplary embodiment, the second cover element 112b also partially covers the cover space 126. The cover surface 136b of this cover element 112b thus partially also forms a cover surface

Boundary area for the cover space 126.

The cover space 126 extends essentially elongated between two end faces.

The part of the cover space 126 which extends in an elongated manner is arched and covered by the first cover element 112a and, for example, one of the two end faces of the cover space 126 is also covered by the first cover element 112a.

In particular, the second cover element 112b essentially covers one of the two end faces of the cover space 126.

In an assembled state, the cover elements 112 of the cover unit 100 are arranged with one another with play and the cover elements 112 are arranged sealed against one another.

The cover unit 100 is mounted on the component 120 to be covered in the assembled state. The first cover element 112a comprises a receptacle 142 for

Inclusion of the second cover element 112b.

In particular, the cover element 112 comprising the receptacle 142 comprises a receptacle section 144 which encompasses a receptacle area 146.

In particular, the receiving section 144 is formed by part of the edge section 132. Thus, the receiving area 146 is partially delimited by the geometric edge contour 134 of the cover element 112a.

It is provided that in the assembled state and in particular also in the assembled state, the second cover element 112b is essentially arranged in the receiving area 146.

Preferably, the second cover member 112b is on the first

Cover element 112a, in particular in the receptacle 142, is arranged in a floating manner.

The cover elements 112a and 112b, for example the receptacle 142, preferably comprise a latching device. Thus, the cover elements 112a and 112b can be snapped together and can thus be attached to one another with play.

In particular, it is provided that a tolerance gap 152 runs between the cover elements 112a and 112b.

In particular, the tolerance gap 152 extends between the cover elements 112a and 112b in an area in which the two are arranged next to one another. In this exemplary embodiment, the tolerance gap 152 runs along the receiving section 144 in the assembled state.

The corresponding ones therefore fall in the area of the tolerance gap 152

Portions of the edge contour 134 of the cover elements 112a and 112b essentially together. In particular, the tolerance gap 152 essentially runs along the coincident sections of the edge contours 134.

In particular, the cover parts 112a and 112b are formed from materials with different coefficients of thermal expansion.

The cover element 112a is formed, for example, from plastic. The cover element 112b is formed in particular from a metallic material, for example from aluminum.

The tolerance gap 152 is designed in such a way that in a temperature application area of the cover unit 100, different expansions of the cover elements 112 are compensated for by the tolerance gap 152 when the temperature changes.

A sealing element 162 of the sealing system 114 is arranged between the cover elements 112a and 112b.

In particular, the sealing element 162 is an elastic sealing element.

The sealing element 162 is preferably a soft material seal.

For example, the sealing element 162 is an elastomer seal.

The sealing element 162 extends between the sealing elements 112 and extends essentially along their edge contours 134. In particular, the sealing element 162 is arranged along the receiving section 144. In an unassembled state, the sealing element 162 preferably has a shape which runs along a sealing contour 164 and extends transversely to the sealing contour 164.

The sealing contour 164 essentially corresponds to the sections of the edge contour 134 in the sections of the cover elements 112, between which the sealing element 162 is intended to seal.

The extent transverse to the sealing contour 164 in the direction from one of the cover elements 112 to be sealed to the other cover element 112 to be sealed is in particular greater than an extension of the tolerance gap 152 between the cover elements 112 therein

Direction.

Thus, the sealing element 162 at least partially fills the tolerance gap 152 and thus seals between the cover elements 112.

The sealing element 162 is preferably acted upon by the cover elements 112 and partially deformed.

In particular, a groove 168 is provided in one of the cover elements 112, for example in the first cover element 112a.

The groove 168 runs at least partially along the edge contour 134 of the cover element 112. In this exemplary embodiment, the groove 168 runs along the receiving section 144.

The groove 168 is provided here to partially accommodate the sealing element 162. In this way, the sealing element 162 is preferably held in the correct position between the cover elements 112. In particular, the groove 168 thus also forms a guide for the arrangement of the cover elements 122 on one another. For example, the groove 168 forms a guide in the receptacle 142.

The cover elements 112 have sealing sections 172, which are provided for sealing against the other sealing elements 112.

In this embodiment section, the edge sections 132 essentially also form the sealing sections 172.

The sealing sections 172 each have a sealing surface 174, which are provided for sealing.

In particular, the sealing sections 172 are designed to be wider transversely to their course than the sealing surfaces 174, so that one

Displacement of the cover elements 112 within their play, the respective sealing section 172 still has an area which as

Sealing surface 174 can serve.

In particular, the sealing system 114, in particular by means of the sealing element 162, forms at least one sealing line on the respective sealing surfaces 174.

The sealing surfaces 174 are at least largely transverse to one

Sealing direction 178 oriented. Preferably, the sealing surfaces 174 are oriented at least approximately perpendicular to the sealing press direction 178.

The orientation of a surface is essentially transverse, in particular at least approximately perpendicular, to its normal. The sealing surfaces 174 thus run in particular transverse, preferably at least approximately perpendicular, to the sealing pressing direction 178.

In this embodiment, the receiving section 144 has a receiving main section 182. The main receiving section 182 forms a large part of the receiving section 144. In particular, the main receiving section 182 runs essentially along a large part of the geometric edge contour 134 in the region of the receiving section 144.

A receiving side portion 184 is connected to each side of the main receiving portion 182.

The receiving side sections 184 encompass the receiving area 146 in particular laterally.

The main receptacle section 182 extends in particular transversely, preferably at least approximately perpendicularly, to the sealing pressing direction 178.

For example, in the area of the receiving side sections 184

Sealing surfaces 174 only inclined to the sealing pressing direction 178. In particular, the inclination of the sealing surfaces 174 is

Sealing pressing direction 178 is nevertheless so great that the part of the sealing element 162 which is arranged in the region of the receiving side sections 184 between the cover elements 112 is acted upon sufficiently by the covering elements 112 when loaded in the assembled state and thus also in the region of the receiving side sections 184 between the covering elements 112 seals.

In particular, provision is made for the receiving area 146 to run essentially in the direction of the sealing pressing direction 178. Preferably, the cover element 112 received in the receptacle 142, for example the cover element 112b, is in the assembled state with respect to the sealing pressing direction 178 between the

Receiving section 144, in particular its main receiving section 182, and the component 120 to be covered.

In particular, in the assembled state and in the assembled state, the geometric plane in which the cover surface 136 of the one in FIG

Recording received cover element 112, for example the cover surface 136b, at least approximately parallel to the sealing press direction 178.

In the cover element 112a, the sealing surface 174 is arranged in the groove 168. In particular, a groove bottom forms the sealing surface 174.

In this variant of the exemplary embodiment, the other cover element 112b has no groove 168 in the region of the sealing surface 174. A substantially flat surface of the cover member 112b

in particular its sealing section 172b, forms the sealing surface 174b.

In variants of the exemplary embodiment, however, it is provided that the other cover element 112b also has a groove 168, into which the sealing element 162 in the assembled state and in the assembled state

Condition is recorded.

The sealing sections 172 of the cover elements 112 are transverse to the sealing contour 164 and transverse to the sealing pressing direction 178,

in particular at least approximately perpendicular to the sealing contour 164 and to the sealing pressing direction 178, wider than that

Sealing surfaces 174. In particular, the surfaces of the sealing sections 172, which have the sealing surfaces 174, are designed to be wider, in particular at least approximately perpendicular, to the sealing contour 164 and the sealing press direction 178 than the sealing surfaces 174 themselves.

Thus, the sealing elements 112 can be displaced relative to one another within their play, and parts of the sealing sections 172 of the respective cover elements 112 are always arranged opposite one another, so that these opposite parts of the sealing sections 172

Can form sealing surfaces 174 and the cover elements 112 can be sealed and sealed at their respective play on sealing surfaces 174.

In this exemplary embodiment, the cover elements 112 are preassembled to one another in the assembled state. The cover unit 100 can thus be mounted on the component 120 to be sealed as a component which consists of a plurality of cover elements 112 which are firmly arranged with play.

The cover unit 100 covers an area to be covered in the component 120 to be covered, the area to be covered in this embodiment being the cover space 126 and the cover unit 100 covering this cover space 126.

In this case, the individual cover elements 112 are preferably each connected directly to the component 120 to be covered and fastened thereon.

For this purpose, fastening means 212 are provided, which in particular comprise cooperating fastening parts. In this case, in particular one fastening part each is arranged on the respective cover element 112 and on the component 120 to be covered. For the correct arrangement of the cover element 112 on the component 120 to be covered, the respective fastening means 212 must be precisely adjusted in its position. In particular, the interacting fastening parts must be precisely aligned with each other.

The fastening means 212 thus form, in particular, precision-required parts 116 of the respective cover elements 112.

For example, in the simplest case, the fastening means 212 comprise a screw and a screw socket, the screw having to be inserted into the screw socket with a precise fit.

In particular, at least one of the cover elements 112, here for example the cover element 112b, comprises a fastening recess 214.

The mounting recess 214 is provided to one of the cover elements 112, here the cover element 112a, by means of its

Fastening means 212 to connect another cover element 112, here the cover element 112b, directly to the component 120 to be covered.

The cover element 112, for example the cover element 112b, with the fastening recess 214 lies between the other cover element 112, here the cover element 112a, and the component 120 to be covered.

The fastening means 212 engages through the fastening recess 214 without the covering element 112 having the fastening recess 214, here the covering element 112b, in its position, in particular at least in its position within the intended play

affect. For example, the fastening recess 214 is designed as a passage for the fastening means 212. In particular, a conversion of the fastening recess 214 encompasses a passage opening for the fastening means 212. The opening is so large that the

Fastening means 212 can reach through them without the covering element 112 having the fastening recess 214 being impaired in a positional shift, at least in its intended play.

For example, the conversion of the fastening recess 214 forms a stop for the fastening means 212 extending through it, the fastening means 212 during a relative displacement of the cover elements 112, which on the one hand have the fastening means 212 and on the other hand the fastening recess 214, against which the stop forming the stop strikes and within the intended game that

Fastening means 212 and the stop are spaced apart.

In particular, it is provided that a bearing element 218

trained cover element 112, here for example the cover element 112b, is firmly and firmly connected to the component 120 to be covered and thus the load-bearing element 218 forms a large force-resistant unit with the component 120 to be covered.

For example, the load-bearing element 218 is screwed to the component 120 to be covered.

The cover unit 100 comprises a cover sealing surface 222 for sealing against the component 120 to be sealed.

The cover sealing surface 222 extends essentially along a geometric cover sealing contour 224. In particular, the cover sealing contour 224 runs at least essentially in sections along a respective edge contour 134 of a respective cover element 112.

In particular, the edge contour 134 and the cover sealing contour 224 coincide at least in sections.

The cover sealing surface 222 is at least largely oriented transversely, preferably at least approximately perpendicularly, to the sealing pressing direction 178.

In particular, the cover sealing surface 222 extends in the

Essentially transversely to the sealing pressing direction 178, in particular at least approximately perpendicular to the sealing pressing direction 178.

In particular, the cover sealing surface 222 is designed to correspond to a sealing surface on the component 120 to be covered. In particular, the sealing surface on the component 120 to be covered runs along an edge portion thereof.

The sealing surface on the component 120 to be covered essentially runs along one of the sealing cover contour 224

corresponding contour.

In this embodiment, it is provided that the cover sealing surface 222 of two cover elements 112, here the

Cover elements 112a and 112b is formed.

In particular, the cover elements 112, which at least partially form the cover sealing surface 222, that is to say, for example, the cover elements 112a and 112b, have cover sealing sections 226. The cover sealing sections 226 form the cover sealing surfaces 222. In particular, the cover sealing portions 226 are formed by respective edge portions 132.

The cover unit 100 further comprises a sealing element 232 for sealing between the cover elements 112 and the component 120 to be sealed.

The sealing element 232 runs essentially along one

Cover sealing contour 224 corresponding contour.

The sealing element 232 is preferably designed to be elastic.

In particular, the sealing element 232 is a soft material seal, for example an elastomer seal.

Preferably, the cover sealing portion 226 has a groove 236.

The groove 236 is provided for receiving the sealing element 232. In the assembled state of the cover unit 100, the sealing element 232 is arranged in the groove 236.

In particular, the cover unit 100 can thus be easily mounted on the component 120 to be covered as a component of cover elements 112 and the sealing element 232.

In particular, the sealing element 232 for sealing between the cover unit 100 and the component 120 to be covered and that

Sealing element 162 for sealing between the cover elements 112 is designed as a one-piece sealing unit element 242 (FIG. 9). In particular, the sealing unit element 242 has several

Sealing sections which each run along corresponding sections of the cover sealing contour 224 and the sealing contour 164. The individual sections are integrally connected to one another.

Thus, the sealing unit element 242 in particular forms several

Sealing loops, the sealing loops of respective

Sealing sections are formed.

In particular, a respective sealing loop runs around a respective one

Cover member 112.

In particular, the sealing elements 232 and 162 and thus also the sealing unit element 242 essentially have an H-shaped profile in a cross section which runs transversely, in particular at least approximately perpendicularly to the sealing contour 164 or cover sealing contour 224.

In particular, two sealing lips 246 each extend from a sealing main body in the direction of each of the sealing surfaces to be sealed.

In this exemplary embodiment, the second cover element 112b is designed as a supporting element 218.

Here, the load-bearing element 218 has, for example, two passages 252.

The passages 252 are in particular provided as passages 252 for control devices, in particular control shafts. For example, the passages 252 are each provided for a camshaft. In particular, the control device, in particular the control cases, engages through the respective passage 252 in an assembled state.

To stabilize the penetrating control device, the cover element 112 forming the load-bearing element 218, here, for example, the cover element 112b, is stable and the control device is load-bearing, that is to say appropriately stable, and in particular firmly connected to the component 120 to be sealed.

In addition, the control device, in particular the control shaft, must be arranged precisely and thus high precision requirements are placed on the passages 252. In particular, the passages 252 may only have small tolerances and thus high precision requirements are placed on their manufacture.

The passages 252 thus form, in particular, precision-required parts 116 of the cover element 112.

Preferred features and an advantageous mode of operation of the cover unit 100 are briefly summarized as listed below.

The cover unit 100 comprises a plurality of cover elements 112 for covering a component 120 and in particular for sealing it.

At least some of the cover elements 112 have high precision requirements, in particular with regard to their relative position in an assembled state to the component 120. For example, one or more of the cover members 112 has a precision-requiring part 116 that needs to be precisely positioned. For simple assembly of the cover unit 100 with its cover elements 112, the cover elements 112 are arranged with play against one another and sealed against one another. Thus, the cover elements can be precisely aligned with and mounted on the component 120, tolerance inaccuracies between the cover elements 112 being able to be compensated for by their play relative to one another.

In particular, overdefinitions can be avoided, for example, by the respective precision-requiring parts 116 that are to be precisely arranged.

In this exemplary embodiment, a sealing element 162 is provided for sealing the cover elements 112 against one another, which is designed in particular to be elastic. Thus is a seal of the

Given cover elements 112 against each other and due to the elasticity of the sealing element 162, this relative displacement of the cover elements 112 adapts to one another within their play. This provides a secure seal even when the cover elements 112 are shifted within their play.

Advantageously, the sealing surfaces 174 on the cover elements 112, on which the cover elements 112 are sealed against one another, and the cover sealing surface 222 on which is sealed between the cover unit 100 and the component 120 to be sealed, are oriented essentially the same. This simplifies assembly, since essentially only one application is required in one direction, namely the sealing press direction 178.

In particular, the sealing surfaces 174 and / or the cover sealing surface 222 are oriented essentially the same if they run at least approximately parallel to one another. In particular, the sealing surfaces 174 and / or the cover sealing surface 222 are oriented essentially identically if they run transversely, preferably at least approximately perpendicularly, to the sealing press direction 178.

Sealing elements 162 and 232 are provided for sealing, these preferably forming a one-piece sealing unit element 242 for easier assembly.

It is particularly favorable in the embodiment if a cover element, here for example the cover element 112b, in which the precision-requiring part 116 has to be particularly precise, is made of metal, in particular aluminum.

The precision-requiring part 116 is in particular a passage 252 for a control device, in particular a control shaft.

For example, the cover unit 100 has a cover element 112, here for example the cover element 112b, which is a load-bearing element 118.

The load-bearing element 118 is provided in particular for holding a force-transmitting element, for example a shaft, and must be designed to be correspondingly stable for holding this force-transmitting element. The load-bearing element 118 and thus also the cover element 112 forming the load-bearing element 118 are preferably formed from metal, for example aluminum.

In particular, the cover elements 112 are fastened by means of fastening means 212 directly to the component 120 to be sealed. The fastening means 212 preferably act on the cover elements 212 at least approximately in the same way

Direction, in particular at least approximately in the direction of the sealing direction 178.

In particular, the fastening means 212 are arranged in such a way that they do not impair the displacement of the other cover elements 112, for the fastening of which the fastening means 112 are not provided, at least within their intended play. For example, the

Fasteners 212 and these other cover members 112

at least a distance which corresponds to the intended game spaced from each other.

In a second one, shown by way of example in FIGS. 10 to 13,

Embodiments of a cover unit 100 'are those

Elements which have at least the fundamentally the same function and / or are essentially of the same design as in the first embodiment, for example, with the same reference numerals and with respect to

Description of the same is in full on the statements in

Reference to the first embodiment, unless an alternative embodiment is described below. If an alternative design or for other reasons, especially the

Design of the element to be referred to in this embodiment, the corresponding reference number with a

Embodiment characterizing stroke.

The cover unit 100 'also comprises a plurality of cover elements 112', for example two cover elements 112a 'and 112b'.

The cover elements 112 'also have precision-requiring parts 116, for example attachment points and passages 252 for one

Control device, in particular for waves and / or for power

transmitting elements, such as drive shafts. The cover elements 112 'also have edge sections 132 which essentially run along a respective geometric edge contour 134.

The respective edge contour 134 encloses a cover surface 136 of the cover elements 112, the respective cover element 112, that is to say, for example, the cover elements 112a ′ and 112b ′, essentially being in their respective cover surface 136, that is to say, for example

Cover surface 136a 'and 136b' extend.

In this exemplary embodiment, it is provided that the cover elements 112 'are essentially planar or essentially flat

Cover elements are.

The respective edge contour 134, for example the edge contours 134a 'and 134b', runs in a respective geometric cover level 332, that is to say for example in geometric cover levels 332a 'and 332b'.

In particular, the respective cover surface 136 (for example 136a ’and 136b’) runs in the respective geometric cover plane 332 (332a 'and 332b').

The planar cover elements 112 each have an extension in two directions of extension that are perpendicular to one another in the respective geometric cover plane 332, which is substantially larger, for example at least a factor 10 larger, than an extension of the planar cover element 112 perpendicular to the cover plane 332. In particular, a cover part of the planar cover element 112 extends in the geometric cover plane 332, while individual elements can protrude somewhat from the geometric cover plane 332.

In particular, the slightly protruding elements of the stabilization are bracing elements. However, an extension of the parts protruding from the geometric cover plane 332, in particular their extension out of the geometric cover plane 332, is substantially smaller than the extension of the cover element 112 in the geometric cover plane 332.

In particular, the cover part extends in the cover surface 136 and is the essential part of the cover element 112, which at least partially covers the component 120 to be covered.

The respective geometric cover planes 332, for example the geometric cover planes 332a 'and 332b', run in the

Assembly state and in the assembled state at least approximately parallel.

In particular, it is provided that the respective sealing surfaces 174 of the cover elements 112 and the cover sealing surface 222 run at least approximately parallel to the geometric cover planes 332.

In particular, the geometric cover planes 332 and the cover sealing surface 222 and the sealing surfaces 174 run at least approximately perpendicular to the sealing pressing direction 178. In this exemplary embodiment it is provided that a cover element 112, for example the cover element 112a ′, is a base cover element 342.

The base cover member 342 encompasses the entire cover

sealing surface 322. In this embodiment, it is provided that only one cover element 112 forms the entire cover sealing surface 222.

In particular, the cover sealing surface 222 runs along the edge section 132 of the base cover element 342.

In particular, it is provided that the further cover elements 112, here for example the cover element 112b ', are arranged on the base cover element 342 and are sealingly connected to it.

In particular, the base cover element 342 has a strut 346.

The further cover elements 112, here the cover element 112b ', can be arranged in a sealing manner on the strut 346. In the assembled state and in the assembled state, the further cover elements 112, here the cover element 112b ', are arranged sealingly against the strut 346

In particular, the strut 346 is formed from individual sealing sections 172. For example, the sealing sections 172 are assembled into a truss 346 in the manner of a truss. In the case of the basic cover element 342, its edge contour 134 surrounds a surface, of which only a part is covered by the cover part 336 of the basic cover element 342. To cover the other parts of this area, further cover elements, here for example cover element 112b ', are arranged in a sealing manner against base cover element 342.

To seal the cover elements 112 from one another, sealing elements 162 are again provided, which are not shown in the figures. In particular, in this exemplary embodiment too, the sealing elements 162 are designed as an elastic seal and in particular as an elastomer seal.

A sealing element 232 is also provided for sealing between the cover unit 100 ′, in particular the base cover element 342, and the component 120 to be covered and in particular also to be sealed. This sealing element 232 is also preferably an elastic seal, in particular an elastomer seal.

For example, in variants of the exemplary embodiment, grooves 168 and 236 are provided on the cover elements 112.

The cover elements 112 are fastened to the component 120 to be covered with fastening means 212.

It is again provided in particular that the cover elements 112 are attached directly to the component 120 to be covered.

For this purpose, in particular a cover element 112, in particular the base cover element 342, has fastening cutouts 214. In the fastening recesses 214, the fastening means 212 of the other covering elements 112, for example that of the covering element 112b ′, can reach through from the basic covering element 342 to the component 120 to be covered without being affected. So will the others

Cover elements 112 attached directly to the component 120 to be covered.

For example, at least some mounting recesses 214 are in the

Area of the strut 346 provided.

For example, a sealing section 172, which partially forms the strut 146, has a bulge in the region of the fastening recess 214.

The corresponding fastening means 212 can then connect the cover element 112 and the component 120 to be sealed directly to one another when bulging past the base cover element 342

fasten.

It is advantageous here that the fastening means 212 is arranged in the vicinity of the sealing section 172, so that its action for sealing acts in the immediate vicinity of the covering section 172.

In this exemplary embodiment, it is provided that the cover elements 112 are formed from plastic.

In particular, a holding element 352 is also provided in this exemplary embodiment. In particular, the holding element 352 has parts of the control device and is in particular to be precisely aligned to parts 116 of at least one cover element 112, for example of the cover element 112b ', which require precision.

For precise and stable training, the holding element 352 is made in particular of metal.

In particular, the holding element 352 is fastened with corresponding fastening means 212 directly to the component 120 to be covered. In particular, the cover elements 112 have corresponding fastenings

Openings 214 for the fastening means 212 of the holding element 352.

In particular, the holding element 352 is provided for suspending the component 120 to be covered.

Some preferred features and an advantageous mode of operation of the cover unit 100 'are thus briefly summarized as follows:

The cover elements 112 'are essentially planar, with corresponding geometric cover planes 332 preferably running at least approximately perpendicular to one another.

The essentially planar cover elements 112 ′ extend essentially transversely, preferably essentially perpendicular, to the sealing pressing direction 178.

This is for sealing the cover elements 112 against one another and for sealing the entire cover unit 100 'with respect to the component 120 to be covered and in particular also to be sealed

Essentially only one sealing pressing direction 178 is provided. The various parts 116 requiring precision are precise

Arrangement arranged in particular on different cover elements 112.

The various cover elements 112 can be moved relative to one another with play and thus the individual precision-requiring parts 116 can be precisely arranged without the precise alignment of another precision-requiring part 116 being impaired thereby.

For this purpose, in particular the cover elements 112 are connected directly to the component 120 to be covered and fastened thereon.

In particular, the one basic cover element 342 is provided, which is the only one that seals with its cover sealing surface 222 with respect to the component 120 to be covered and sealed. The others

Cover elements 112 are sealingly arranged on the base cover element 342.

In particular, all other elements and features are the same as in the first exemplary embodiment.

In particular, variants of the exemplary embodiments provide that individual configurations of one exemplary embodiment are combined with configurations and features of the other exemplary embodiment.

Claims

PATENT CLAIMS

1. cover unit (100) for a component to be covered (120),

in particular for a motor housing, wherein the cover unit (100) comprises a plurality of cover elements (112), wherein several or all of the plurality of cover elements (112) each comprise at least one precision-requiring part (116), and wherein each of the cover elements (112) each has at least one another cover element (112) is arranged at least in an assembled state with play and the cover elements (112) are sealed against one another.

2. Cover unit (100) according to claim 1, characterized in that at least one cover element (112), in particular all of the cover elements (112) in each case, has at least one sealing section (172) which is provided for sealing against another cover element (112) is.

3. Cover unit (100) according to any one of the preceding claims, characterized in that at least two cover elements (112) along a sealing surface (174) are sealed against each other.

4. Cover unit (100) according to one of the preceding claims, characterized in that the sealing section (172) of at least one cover element (112) has the sealing surface (174) of this sealing element (112), and in particular that the sealing section (172) transverse to one Course direction in which the sealing section (172) and

Sealing surface (174) extend wider than the sealing surface (174).

5. Cover unit (100) according to any one of the preceding claims, characterized in that all sealing surfaces (174) along corresponding sealing sections (172)

Cover elements (112) run, the respective sealing sections (172) in particular being wider than the sealing surfaces (174) transversely to the direction of travel.

6. Cover unit (100) according to any one of the preceding claims, characterized in that the sealing surfaces (174) of at least one cover element (112) for the most part run at least approximately in a geometrical sealing plane, in particular that all cover elements (112) have their respective sealing surfaces (174 ) mostly in a respective one

geometric sealing plane run at least approximately.

7. Cover unit (100) according to one of the preceding claims, characterized in that the geometric sealing planes of several cover elements (112), in particular all

Cover elements (112), at least approximately parallel to each other.

8. Cover unit (100) according to any one of the preceding claims, characterized in that the cover unit (100) comprises a base cover element (342), in particular at the base cover element (342) at least a large part of the others

Cover elements (112), in particular all others

Cover elements (112) are arranged with play.

9. Cover unit (100) according to one of the preceding claims, characterized in that the base cover element (342) has a strut (346) which is formed in particular from a plurality of sealing sections (172), and in particular the strut (346) has a plurality of sealing surfaces (174 ), in particular all sealing surfaces (174) of the base cover element (342).

10. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) comprises an edge section (132), in particular all cover elements (112) each comprise a respective edge section (132), the respective edge section (132 ) runs along a geometric edge contour (134).

11. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112), in particular all cover elements (112)

Cover part comprises / comprise, wherein in particular a respective cover part extends in a respective cover surface.

12. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) extends essentially in a geometric plane, in particular its cover surface (136) running essentially in the geometric plane.

13. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) arches over a cover space (126), wherein

in particular, its cover surface (136) at least partially forms a geometric interface of the cover space (126).

14. Cover unit (100) according to one of the preceding claims, characterized in that in at least one cover element (112) the edge portion (132) has the sealing surface (174), in particular the edge portion (132) forms the sealing portion (172).

15. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) comprises plastic, in particular is made of plastic.

16. Cover unit (100) according to one of the preceding claims, characterized in that all cover elements (112) comprise plastic, in particular are made of plastic.

17. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) comprises a metal, in particular is formed from a metal, wherein in particular the metal is aluminum.

18. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) is designed as a supporting element (218).

19. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) has a receptacle (142) for another cover element (112), in particular for the one designed as a load-bearing element (218)

Cover element (112).

20. Cover unit (100) according to one of the preceding claims, characterized in that at least one snap-in device is provided, by means of which at least two cover elements (112) can be snapped together, in particular snapped into place.

21. Cover unit (100) according to one of the preceding claims, characterized in that a tolerance gap (152) is provided at least in the assembled state, in particular also in the assembled state, between at least two cover elements (112).

22. Cover unit (100) according to the preceding claim,

characterized in that a tolerance gap (152) is provided at least between two cover elements (112) which are arranged one against the other and have different coefficients of thermal expansion.

23. Cover unit (100) according to one of the preceding claims, characterized in that the tolerance gap (152) runs between respective sealing surfaces (174) of the cover elements (112).

24. Cover unit (100) according to one of the preceding claims, characterized in that the tolerance gap (152) extends at least in sections along the edge contour (134) of the corresponding cover element (112).

25. Cover unit (100) according to one of the preceding claims, characterized in that fastening means (212), in particular for at least one cover element (112), are provided for fastening the cover unit (100) to the component (120) to be covered.

26. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) has at least one fastening recess (214), in particular several fastening recesses (214), for one fastening means (212) or several fastening means (212).

27. Cover unit (100) according to one of the preceding claims, characterized in that one fastening means (212), in particular a plurality of fastening means (212), with a respective fastening recess (214) or with a plurality of each

Grip / reach through mounting recesses (214) with play.

28. Cover unit (100) according to one of the preceding claims, characterized in that a plurality of fastening means (212) generate a contact pressure, in particular the contact pressure of at least a large part of the fastening means (212) acting at least approximately in the same sealing pressing direction (178).

29. Cover unit (100) according to one of the preceding claims, characterized in that the cover element (112) designed as a load-bearing element (218) can be connected without play to the component (120) to be covered and in particular is connected without play in the assembled state, in particular is screwed hard.

30. Cover unit (100) according to one of the preceding claims, characterized in that the cover unit (100) comprises a cover sealing surface (222) for sealing the cover unit (100) from the component (120) to be covered.

31. Cover unit (100) according to the preceding claim, characterized in that the cover sealing surface (222) for the most part runs at least approximately in a geometric cover sealing plane.

32. Cover unit (100) according to one of the preceding claims, characterized in that the cover sealing surface (222) runs along a cover sealing section (226), and in particular the cover sealing section (226) transversely to a direction of travel, along which the cover sealing section (226) and the cover sealing surface (222) is wider than the cover sealing surface (222).

33. Cover unit (100) according to one of the preceding claims, characterized in that exactly one cover element (112), in particular the base cover element (342), has the entire cover sealing surface (222), in particular the cover sealing plane running at least approximately parallel to a cover element plane.

34. Cover unit (100) according to one of the preceding claims, characterized in that the cover sealing surface (222) is formed by a plurality of cover elements (112), in particular by exactly two cover elements (112).

35. Cover unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) designed as a supporting element has at least a portion of the cover sealing surface (222).

36. Cover unit (100) according to one of the preceding claims, characterized in that the cover unit (100) comprises at least one sealing element (162) for sealing between at least two cover elements (112).

37. Cover unit (100) according to one of the preceding claims, characterized in that a sealing element (162) is arranged in each case between two cover elements (112) to be sealed against one another.

38. cover unit (100) according to any one of the preceding claims, characterized in that the cover unit (100) a

Sealing element (232) for sealing between the cover unit (100) and the component to be covered (120).

39. Cover unit (100) according to one of the preceding claims, characterized in that several sealing elements (162, 232) are integrally formed as a sealing unit element (242), in particular that all sealing elements (162, 232) are integrally formed, and in particular that the covering unit (100) comprises exactly one sealing unit element (242).

40. Sealing unit (100) according to one of the preceding claims, characterized in that at least one cover element (112) has a groove (168) for a sealing element (162), in particular a groove bottom having at least a portion of one

Forms sealing surface (174).

41. Sealing unit (100) according to one of the preceding claims, characterized in that at least the cover element (212) having the receptacle (142) and / or the cover element (212) accommodated in the receptacle (142) has a groove (168) for the have sealing element (162) arranged between them.

42. Cover unit (100) according to one of the preceding claims, characterized in that at least one sealing element (162) seals at least one tolerance gap (152).

43. Cover unit (100) according to one of the preceding claims, characterized in that at least one sealing element (162, 232) comprises an elastomer, in particular is formed from an elastomer.

44. Cover unit (100) according to one of the preceding claims, characterized in that the precision-requiring part (116) of at least one cover element (112) is formed in one piece with the rest of the cover element (112), in particular in all of them having a precision-requiring part (116)

Cover elements (112) this is integrally formed with the rest of the corresponding cover element (112).

45. Cover unit (100) according to one of the preceding claims, characterized in that in at least one cover element (112) the precision-requiring part (116) is a passage (252), in particular for a shaft, in particular a drive shaft and / or a control shaft .

46. Cover unit (100) according to one of the preceding claims, characterized in that at least one precision

required part (116) a tolerance accuracy of up to ± 0.5 mm, in particular up to ± 0.2 mm, is to be observed.

47. Cover unit (100) according to one of the preceding claims, characterized in that the cover unit (100)

Holding element (352), in particular made of metal, comprises.

48. cover unit (100) according to the preceding claim,

characterized in that the holding element (352) can be fastened directly to the component (120) to be covered and, in particular in the assembled state, is fastened directly to it.

49. Housing, in particular motor housing, characterized in that it comprises a cover unit (100) according to one of the preceding claims.

50. Motor, in particular internal combustion engine for motor vehicles, characterized in that it comprises a cover unit (100) according to one of the preceding claims.