DE102008038519B4 - Bearings, in particular engine bearings - Google Patents

Abstract

Bearing (2), in particular engine bearing for a motor vehicle, which contains the following components: - a housing (4) with an inner wall (16) and end faces (6a, 6b) - a supporting body (8) made of elastomeric material, which is attached to the inner wall ( 16) of the housing (4) is vulcanized, with an adhesion promoter being located between the inner wall (16) and the supporting body (8), - at least one stop (12a - 12d) which is an integral part of the supporting body (8), and the protrudes beyond the housing (4) in the axial direction of the bearing (2), wherein the stop (12a - 12d) rests with a surface (14a - 14d) on the end face (6a, 6b) of the housing (4), the end face (6a, 6b) of the housing (4) in the area (22a - 22d) in which the surface (14a - 14d) of the stop (12a - 12d) rests on the end face (6a, 6b), at least largely free of adhesion promoter is, characterized in that the stop (12a - 12d) by a positive connection with the end face (6a, 6b) against radial displacement is secured in at least one direction.

Description

• - ein Gehäuse mit einer Innenwand und Stirnflächen,
• - einen Tragkörper aus elastomerem Material, der an die Innenwand des Gehäuses anvulkanisiert ist, wobei sich zwischen der Innenwand und dem Tragkörper ein Haftvermittler befindet,
• - mindestens einen Anschlag, der integraler Bestandteil des Tragkörpers ist, und der in axialer Richtung des Lagers über das Gehäuse hinausragt, wobei der Anschlag mit einer Oberfläche an der Stirnfläche des Gehäuses anliegt,

die Stirnfläche des Gehäuses in dem Bereich, in dem die Oberfläche des Anschlages auf der Stirnfläche aufliegt, zumindest weitgehend frei von Haftvermittler ist. Die Erfindung betrifft ferner ein Verfahren zur Herstellung eines Lagers, insbesondere ein Verfahren zur Herstellung eines Motorlagers.The invention relates to a bearing, in particular an engine bearing, which contains the following components:

• - a housing with an inner wall and end faces,
• - a support body made of elastomeric material, which is vulcanized to the inner wall of the housing, with an adhesion promoter being located between the inner wall and the support body,
• - at least one stop which is an integral part of the supporting body and which protrudes beyond the housing in the axial direction of the bearing, the stop resting with one surface on the end face of the housing,

the end face of the housing is at least largely free of adhesion promoter in the area in which the surface of the stop rests on the end face. The invention also relates to a method for producing a bearing, in particular a method for producing an engine bearing.

Bearings of the type mentioned have long been known from the prior art and are used, for example, to fasten the engine of a motor vehicle to the body. For this purpose, the bearing has first fastening means, to which the engine is fastened, and second fastening means, via which the bearing is fastened to the body of the vehicle. Due to the interposition of the bearing between the engine and the body of the vehicle, the engine can vibrate in relation to the body. The bearing includes a housing having an inner wall and end faces, and a support body made of elastomeric material. The supporting body is vulcanized to the inner wall of the housing. To ensure a firm connection between the housing and the supporting body, there is an adhesion promoter between the inner wall of the housing and the supporting body. The supporting body has stops which are an integral part of the supporting body and which protrude beyond the housing in the axial direction of the bearing, with each stop bearing with one surface against the end face of the housing. The stops ensure that the bearing or the surrounding components are not damaged in the event of an axial deflection of the bearing. So that the stops can absorb the mechanical loads acting on them, the stops are firmly connected to the respective end face of the housing. The firm connection is brought about with an adhesion promoter, which is located between the stop and the end face of the housing.

To produce the bearing, the inner surface of the housing is sprayed with an adhesion promoter. The areas of the end faces of the housing on which the stops rest in the finished bearing are provided separately with the adhesion promoter. However, this involves a great deal of effort. It is therefore also known to provide not only the inner wall of the housing with an adhesion promoter in the spray machine, but also the areas of the end faces mentioned. In order to ensure that the remaining area of the end faces (i.e. the area where the stops do not rest) remains free of adhesion promoter, masks are applied to the housing to cover these areas. However, the production of the masks and the positioning of these within the spray machine is also expensive.

In summary, it can be stated that the bearings known from the prior art for mounting engines in a motor vehicle can absorb the mechanical loads acting on them without damage, but are expensive to manufacture.

the EP 1 048 861 A2 describes a method for manufacturing a torsion bar shoulder bearing with four method steps: (1) manufacturing an elastomer spring as an incompletely vulcanized molded part for receiving a sleeve-shaped or bolt-shaped inner connecting part in a central bore and an outer sleeve-shaped connecting element; (2) Pretreating the surface areas of the connection parts to be connected to the molded part with an adhesive system; (3) Sliding the molded part onto the inner connecting part and inserting the molded part thus reinforced into the outer connecting part (or in reverse order), with the result that the elastomer molded part is clamped between the two connecting parts under moderate prestress and (4) final complete vulcanization of the elastomer molded part in the assembled bearing using an annealing furnace at temperatures below 140 to 150 °C.

The object of the invention is to create a bearing that is easy to manufacture and yet can easily absorb the mechanical loads acting on the bearing.

The object is solved by a bearing with the characterizing features of claim 1.

• - in einem ersten Verfahrensschritt ausschließlich die Innenwand des Gehäuses mit Haftvermittler versehen wird,
• - in einem zweiten Verfahrensschritt der Tragkörper aus elastomerem Material an die Innenwand des Gehäuses anvulkanisiert wird.

According to the independent claim 6, the object is achieved in a method for producing such a bearing in that

• - in a first process step, only the inner wall of the housing is provided with adhesion promoter,
• - In a second process step, the support body made of elastomeric material is vulcanized to the inner wall of the housing.

The advantage of the invention can be seen in the fact that the bearing is easy to manufacture, since the areas of the end face of the housing in which the stops come to rest in the finished bearing do not need to be provided with a costly adhesion promoter. Subsequent application of adhesion promoter in these areas of the end faces or covering of the end faces with masks is therefore not necessary. A further advantage of the invention can be seen in the fact that the bearing can nevertheless easily absorb the mechanical loads acting on the bearing. It has been shown that when the bearing hits, only relatively small forces act in the radial direction on the bearing and on the stops, so that these are not separated from the support body despite the lack of attachment to the housing.

According to the invention, the stop is secured against radial displacement in at least one direction by a positive connection with the end face. The advantage of this development can be seen in the fact that the bearing can absorb particularly high mechanical forces, since the stops are secured against radial displacement at least in one direction and can therefore absorb high forces in the radial direction.

According to a development of the invention according to claim 2, the entire end face is largely free of adhesion promoter. One advantage of this further development is that elastomeric material that accidentally gets onto an end face of the housing during the vulcanization of the supporting body to the inner wall of the housing can be easily removed from the end face.

According to a development of the invention according to claim 3, the end face has a recess in the area in which the surface of the stop rests on the end face, which is filled with the material of the stop. The advantage of this development can be seen in the fact that the stop is secured against radial displacement in both directions and the bearing can therefore absorb particularly high radial forces.

According to a development of the invention according to claim 4, the end face has a rib which limits the radial extent of the stop. The advantage of this development can be seen in the fact that a rib can be provided on the end face of the housing in a simple manner.

According to a development of the invention according to claim 5, the rib runs around the entire end face. The advantage of this development can be seen in the fact that the surface of the vulcanization mold with which the support body of the bearing is produced can be pressed onto the circumferential rib. A high surface pressure between the surface of the vulcanization mold and the rib is possible here, so that the interior of the mold (which corresponds to the supporting body) is well sealed off from the exterior of the mold. It is thus ensured that no elastomeric material escapes from the interior of the mold with which the supporting body is produced and unintentionally soils parts of the surface of the housing.

• 1 ein Lager in perspektivischer Ansicht,
• 2 einen Längsschnitt durch das Lager,
• 3 die Stirnfläche des Gehäuses des Lagers,
• 4 einen Längsschnitt durch das Lager,
• 5 einen Verfahrensschritt zur Herstellung des Lagers.

An exemplary embodiment and further advantages of the invention are explained in connection with the figures below, in which:

• 1 a bearing in perspective view,
• 2 a longitudinal section through the camp,
• 3 the face of the housing of the bearing,
• 4 a longitudinal section through the camp,
• 5 a process step for producing the bearing.

A camp in the form of an engine mount is in the following with regard to 1 and 2 explained. 1 shows a schematic representation of a bearing 2 in the form of an engine mount for a motor vehicle. The bearing includes a housing 4 having end faces 6a and 6b and mounting bosses 32a, 32b for attachment of the bearing to a vehicle body. A support body 8 made of elastomeric material is vulcanized onto the inner wall 16 of the housing 4 . Between the inner wall 16 of the housing 4 and the supporting body 8 there is a layer of adhesion promoter which ensures that the supporting body 8 is attached to the housing 4 particularly securely. An inner part 10 is vulcanized onto the supporting body 8 and is used to fasten a unit (eg an engine for a motor vehicle) which is not shown here. The supporting body 8 of the housing 2 also has stops 12a to 12d. The stops 12a to 12d are an integral part of the supporting body 8, i.e. they also consist of elastomeric material, and protrude in the axial direction beyond the housing 4 of the bearing, with each stop 12a to 12d having a surface 14a to 14d on the end face 6a or 6b of the housing 4 rests flush. Each end face 6a and 6b of the housing 4 is largely free of adhesion promoter, at least in the area in which the surface 14a to 14d of each stop 12a to 12d rests on the end face 6a or 6b. Preferably is the entire end face 6a or 6b is largely or completely free of adhesion promoter.

A form-fitting connection can be produced between the stops 12a to 12d and the end faces 6a and 6b, respectively, in order to secure the stops 12a to 12d against radial displacement at least in one direction. A first way to produce such a form-fitting connection is in 2 shown and is that the end face 6a or 6b has ribs 18a to 18d, which limit the stops 12a to 12d in their radial extent. The ribs 18a and 18c limit the radial displacement of the stops 12a and 12c in the direction of the arrow 20a. The ribs 18b and 18d limit the radial displacement of the stops 12b and 12d in the direction of the arrow 20b.

3 shows the end face 6a of the housing 4. The end face 6b of the housing 4 looks the same. In the 3 the areas 22a and 22b of the end face 6a can be seen, on which the surfaces 14a, 14b of the stops 12a, 12b (see 2 ) rest. The areas 22a, 22b are at least largely free of adhesion promoter. The regions 22a, 22b and the entire end face 6a are preferably completely free of adhesion promoter. The end face 6a has a recess 24a, 24b in each of the regions 22a, 22b. The rib 18 runs around the entire end face 6a and contains in the 2 indicated ribs 18a and 18b. The rib 18 can be used to produce the supporting body 8 (see also 1 and 2 ) A vulcanization mold are placed into which the elastomeric material to form the supporting body 8 is injected. Here, due to the small surface area of the rib 18, a high surface pressure between the mold and the rib 18 is possible. It is thus impossible for elastomeric material to get onto the area radially outside of the rib 18 that should remain free of elastomeric material. Rather, the casting material only reaches the areas 22a, 22b and forms the stops 12a, 12b there (see 1 and 2 ) out of.

4 shows a longitudinal section through the bearing 2 and largely corresponds to the 2 . Therefore, in the following, only the differences between the 4 and the 2 received. In the 4 Figure 1 shows the recesses 24a to 24d in the areas 22a to 22d. The recesses 24a to 24d are filled with the elastomeric material of the support body 8 and anchor the stops 12a to 12d in the end faces 6a and 6d of the housing. Thus, the stops 12a to 12d are positively connected to the end faces 6a, 6b and secured against radial displacement in both directions (indicated by the arrow 26).

5 shows a schematic representation of a process step during the manufacture of a bearing. The housings 4 of the bearings are positioned in a spray chamber 28 in such a way that the end faces 6a, 6b of the housings 4 lie flat on one another and cover one another. A spray gun 34 is guided centrally through the interior of the housing 4 . Adhesion promoter is sprayed through the spray gun 34 and evenly coats the inner walls 16 of the individual housings 4 .

In the event that the end faces 6a and 6b of the individual housings 4 do not have any ribs 18 (see 3 ) have, the individual end faces 6a, 6b of the housing 4 lie flat on top of each other and remain completely free of adhesion promoter during the spraying process. If, on the other hand, the end faces 6a, 6b of the individual housings 4 have ribs 18 (see 3 ) have, the individual housings 4 lie with the ribs 18 on top of one another. In this case, the areas 22a to 22d (see 2 and 3 ), in which the stops later come to rest, slightly wetted with spray mist of the adhesion promoter (ie the areas 22a to 22d remain largely free of adhesion promoter in the sense of the invention). This is not disruptive, since the stops 12a to 12d (see Fig 2 ) come to rest. In this case, too, the remaining area of each end face 6a, 6b remains completely free of adhesion promoter.

The individual housings 4 are removed from the spray chamber 28 after only the inner walls 16 of the housing 4 have been provided with adhesion promoter in the spray chamber 28 . Immediately thereafter (ie without further intermediate steps) the supporting body 8 (see FIG 1 and 2 ) made of elastomeric material in a manner known per se to the inner wall 16 of the individual housing 4 vulcanized.

Reference List

2

warehouse

4

Housing

6a, 6b

face

8th

body

10

inner part

12a - 12d

attack

14a - 14d

surface

16

inner wall

18a - 18d

rib

20a, 20b

Arrow

22a - 22d

area

24a - 24d

recess

26

Arrow

28

spray chamber

30

-

32a, 32b

mounting eye

34

spray gun

Claims (6)

Bearing (2), in particular engine bearing for a motor vehicle, which contains the following components: - a housing (4) with an inner wall (16) and end faces (6a, 6b) - a supporting body (8) made of elastomeric material, which is attached to the inner wall ( 16) of the housing (4) is vulcanized on, with an adhesion promoter being located between the inner wall (16) and the supporting body (8), - at least one stop (12a - 12d), which is an integral part of the supporting body (8), and the protrudes beyond the housing (4) in the axial direction of the bearing (2), wherein the stop (12a - 12d) rests with a surface (14a - 14d) on the end face (6a, 6b) of the housing (4), the end face (6a, 6b) of the housing (4) in the area (22a - 22d) in which the surface (14a - 14d) of the stop (12a - 12d) rests on the end face (6a, 6b), at least largely free of adhesion promoter is, characterized in that the stop (12a - 12d) by a positive connection with the end face (6a, 6b) g secured against radial displacement in at least one direction. Bearing (2) after claim 1 , characterized in that the entire end face (6a, 6b) is largely free of adhesion promoter. Bearing (2) after claim 1 or 2 , characterized in that the end face (6a, 6b) has a recess (24a - 24d) in the region (22a - 22d) in which the surface of the stop (12a - 12d) rests on the end face (6a, 6b). , which is filled with material of the stop (12a - 12d). Bearing (2) after one of Claims 1 until 3 , characterized in that the end face (6a, 6b) has a rib (18a - 18d) which limits the stop (12a - 12d) in its radial extent. Bearing (2) after claim 4 , characterized in that the rib (18a, 18b) runs around the entire end face (6a, 6b). Method for producing a bearing (2), in particular method for producing an engine bearing, according to one of Claims 1 until 5 , characterized in that - in a first process step only the inner wall (16) of the housing (4) is provided with adhesion promoter, - in a second process step the supporting body (8) made of elastomeric material is bonded to the inner wall (16) of the housing (4) is vulcanized.

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