DE102009044093B4 - Bearing for a motor vehicle - Google Patents

Abstract

Bearing (2) for a motor vehicle, which contains the following components: - an inner part (4), - an outer part (6), which includes the inner part (4), - an elastomeric body (8), the inner part (4) with the Outer part (6) via at least two spring struts (10a, 10b) and which has a stop buffer (12) located on the outer part (6), - a stop (32) which is placed between the inner part (4) and the outer part (6) is arranged such that the stop buffer (12) is pretensioned, an insert holder (24) being pushed into the inner part (4) and the stop (32) being constructed in one piece together with the insert holder (24), characterized in that the stop ( 32) is designed as a tongue-like projection which runs in the axial direction of the bearing (2) and rests with the surface (38) facing the inner part (4) on the outer wall (18) of the inner part (4), and with the surface (40) facing away from the inner part (4) rests against the elastomer body (8).

Description

• - ein Innenteil,
• - ein Außenteil, das das Innenteil umfasst,
• - einen Elastomerkörper, der das Innenteil mit dem Außenteil über mindestens zwei Federbeine verbindet und der einen am Außenteil befindlichen Anschlagpuffer aufweist,
• - einen Anschlag, der derart zwischen dem Innenteil und dem Außenteil angeordnet ist, dass der Anschlagpuffer vorgespannt ist.

The invention relates to a bearing for a motor vehicle, which contains the following components:

• - an inner part,
• - an outer part that encloses the inner part,
• - an elastomer body which connects the inner part to the outer part via at least two spring struts and which has a stop buffer located on the outer part,
• - A stop which is arranged between the inner part and the outer part that the stop buffer is prestressed.

Such bearings are already known from the prior art and are used in a motor vehicle, e.g. for mounting the engine. The outer part is usually designed as a cylindrical outer tube and the spring legs of the elastomer body, which connect the sleeve-like inner part to the outer part, run in the radial direction of the outer part, but other geometric configurations of the bearing are also possible. The inner part contains an insertion opening into which an insert holder is inserted in the axial direction of the bearing. The motor of a motor vehicle, for example, can be fastened to the insertion holder in such a way that when the bearing is installed in a motor vehicle, the weight of the motor is perpendicular to the longitudinal axis of the bearing (which runs in the axial direction of the cylindrical outer tube). The engine of the motor vehicle is then resiliently mounted by the spring struts of the elastomeric body. The spring deflection that the spring struts allow is limited by stops in the elastomer body. It has been shown that the service life of the elastomer body and thus of the entire bearing can be significantly increased if the elastomer body is preloaded in the axial direction. This is due to the fact that the spring deflection that the spring struts allow is limited, at least in the direction of pull, by the preload.

It is known to generate the prestress by a stop which is arranged between the inner part and the outer part of the bearing in such a way that the elastomer body of the bearing is prestressed. By introducing the stop, a prestressing of the elastomer body can be reliably achieved. However, it should be noted that the insertion of the stop is an additional work step that makes the manufacture of the bearing complicated and expensive.

the FR2769962A1 describes a flexible mount having a mandrel connected to the housing by branches of flexible material. Before assembly, a preload is created by compression between the spindle coating and the padding integrated with the mount. The compression is created by a rigid insert between the spindle coating and the padding. The insert partially integrates the mounting threads on the spindle. The bracket consists of a sheet metal rider.

the DE 27 55 117 A1 describes a pretensionable bearing element with an elastomer body arranged in a bearing sleeve and with an inner part surrounded by the elastomer body. The elastomer body has cavities arranged on both sides of the inner part. The inner part is provided on its outside with at least one recess for receiving a loose stop body protruding into one of the cavities.

The invention is therefore based on the object of creating a bearing that has a simple structure and is easy to manufacture.

The object is achieved according to the features of claim 1 and claim 3.

The advantage achieved with the invention can be seen in particular in the fact that the stop with the insertion holder is pushed into the insertion opening of the inner part and brought into position in a single process step. Prestressing of the elastomeric body or the stop buffer of the elastomeric body is thus achieved in the same method step with which the insertion holder is also pushed into the inner part. Thus, one production step is omitted in the production of the bearing, which makes the production of the bearing less expensive.

The stop and the insertion holder can first be manufactured separately and then joined together in a non-positive, positive or material connection.

According to a further development of the invention according to claim 2, the stop and the insertion holder are, however, made solid and consist of a single material. The wording “manufactured from solid” should be understood here and in the following to mean that the stop, together with the insert holder, is made from one piece and from a single material and has no joining edges. The one-piece part, consisting of stop and insert holder, can be made of cast aluminum, for example. The advantage of this development can be seen in the fact that the stop and the insert holder can be manufactured in one piece in a single manufacturing process. A separate manufacture of the stop and a connection with a separately manufactured insert holder are therefore not necessary.

• - in axialer Richtung des Lagers verläuft und
• - mit der Oberfläche, die dem Innenteil zugewandt ist, auf der Außenwand des Innenteils aufliegt und mit der Oberfläche, die dem Innenteil abgewandt ist, an dem Elastomerkörper anliegt.

According to a further development of the invention according to claim 3, the stop is designed as a tongue-like projection that

• - Runs in the axial direction of the bearing and
• - With the surface that faces the inner part rests on the outer wall of the inner part and with the surface that faces away from the inner part, rests against the elastomeric body.

The advantage of this development can be seen in the fact that the inner part has a completely closed shell and is therefore easy to manufacture and at the same time has a high level of stability (for more details, see the description of the figures).

• - der Anschlag über mindestens einen weitgehend in axialer Richtung des Lagers verlaufenden Steg mit dem Einsteckhalter verbunden ist, und
• - das Innenteil mindestens einen weitgehend in axialer Richtung des Lagers verlaufenden Schlitz aufweist, und
• - der Einsteckhalter derart in das Innenteil eingeschoben ist, dass der Steg in dem Schlitz verläuft.

A development of the invention according to claim 4 is characterized in that

• - the stop is connected to the insert holder via at least one web which runs largely in the axial direction of the bearing, and
• - the inner part has at least one slot running largely in the axial direction of the bearing, and
• - The insertion holder is pushed into the inner part in such a way that the web runs in the slot.

The advantage of this development can be seen in the fact that the stop is connected over a large area to the part of the insertion holder that is pushed into the inner part. In this way, forces that are introduced into the stop via the stop buffer are passed on directly to the insert holder. Damage to the insert holder or breaking off of the stop is thus reliably prevented.

According to a development of the invention according to claim 5, the slot is shorter than the inner part, so that the outer wall of the inner part is closed by a bridge in the region of the slot. The advantage of this further development can be seen in the fact that the bridge gives the inner part additional stability in the area of the slot, making it more difficult for the inner part to be bent open. The insert holder is thus securely fixed in the inner part. The length of the groove is preferably approximately 50% to 95% of the inner part, with the bridge then having a width of 50% to 5% of the length of the inner part.

According to a development of the invention according to claim 6, the inner part has a rib at its end, which runs in the axial direction of the bearing. The advantage of this development can be seen in the fact that the rib makes it even more difficult for the inner part to bend open and the insertion holder is thus fixed particularly well in the inner part.

• 1 ein Lager ohne Einsteckhalter,
• 2 das Lager gemäß 1 im Querschnitt,
• 3 das Lager gemäß 1 im Querschnitt mit eingeschobenem Einsteckhalter,
• 4 ein Lager ohne Einsteckhalter in perspektivischer Ansicht,
• 5 das Lager gemäß 4 im Querschnitt,
• 6 einen Einsteckhalter,
• 7 das Lager gemäß 4 im Querschnitt mit eingeschobenem Einsteckhalter.

An exemplary embodiment and further advantages of the invention are explained in connection with the figures below. It shows:

• 1 a bearing without insert holder,
• 2 the camp according to 1 in cross section,
• 3 the camp according to 1 in cross-section with pushed-in holder,
• 4 a perspective view of a bearing without an insert holder,
• 5 the camp according to 4 in cross section,
• 6 a plug-in holder,
• 7 the camp according to 4 in cross-section with inserted holder.

1 shows a bearing 2 for a motor vehicle. The bearing 2 contains a sleeve-like inner part 4 and an outer part 6 which is designed as a cylindrical outer tube and encloses the inner part 4 . The bearing 2 also has an elastomer body 8 which connects the inner part 4 to the outer part 6 via at least two spring struts 10a, 10b which run in the radial direction of the bearing 2. The elastomer body 8 also has a first stop buffer 12 located on the outer part and a second stop buffer 14 opposite this. The two spring legs 10a, 10b and the stop buffers 12, 14 are connected to one another via an elastomer ring 16, which is also part of the elastomer body 8. The structure of a bearing 2 for a motor vehicle is known in this respect and will therefore not be explained in more detail at this point.

2 shows that in the 1 Bearing 2 shown in cross section along the line II / II. Of the 2 it can be seen that the inner part 4 is designed like a cup, which has an enclosed wall 18 and a bottom 20 . In this case, the inner part 4 is aligned within the bearing 2 in such a way that the axial direction of the bearing 2, which is indicated by the line 22, is perpendicular to the floor 20.

3 shows the same cross-section as in FIG 2 . The only difference can be seen in the fact that an insertion holder 24 is pushed into the inner part 4 . The insertion holder 24 has a base 26 which extends in the axial direction 22 (see FIG 2 ) is pushed into the inner part 4. In addition, the insertion holder 24 has a holding element 28 with through-holes 30 . The through holes 30 are perpendicular to the axial direction 22 (see 2 ) and are built in th state of the bearing 2 used to attach a load (eg a motor) to the bearing 2.

In addition to the above components, the male holder 24 has a stop 32, the male holder 24 and the stop 32 being formed in one piece. The one-piece design of the insert holder 24 and the stop 32 can take place by means of a form fit or material connection. Preferably, however, the stop 32 and the insertion holder 24 are made of solid material and consist of a single material, as is also the case in FIG 3 is shown.

The insert holder 24 is pushed into the inner part 4 in such a way that the base 26 of the insert holder 24 is non-positively connected to the wall 18 of the inner part 4 (see 2 ) connected is. In addition, the stop 32 is designed as a tongue-like projection and runs in the axial direction of the bearing 2. The stop 32 is dimensioned such that it closes the gap S between the wall 18 of the inner part 4 and the stop buffer 12 (see 2 ) fills in. Here, the radial extent D of the stop 32 is greater than the gap S, so that when the insert holder 24 is pushed in, the stop buffer 12 is prestressed in the radial direction of the bearing 2 (and thus the bearing 2 itself). The stop 32 tapers at its rear end 34 so that it is easier to insert the insertion holder 24 into the inner part 4 .

The stop 32 is connected to the insertion holder 24 via a narrow web 36 . Between the base 26 of the insert holder 24 and the stop 32 of the insert holder 24 runs a gap into which the inner part 4 engages. In the finished bearing 2 , the stop 32 thus rests on the outer wall of the inner part 4 with the surface 38 which faces the inner part 4 . With the surface 40 facing away from the inner part 4 , the stop 32 rests against the elastomer body 8 and in particular against the stop buffer 12 of the elastomer body 8 .

4 shows a bearing 2 without plug-in holder, which largely corresponds to the bearing 2 1 is equivalent to. The only difference can be seen in the fact that the inner part 4 is designed like a sleeve and has a slot 42 which runs in the axial direction of the bearing.

5 shows a cross section through the bearing 2 according to FIG 4 , which runs through the same sectional plane as that in FIG 1 marked cutting line II/II. Of the 5 it can be seen that the slot 42 runs almost over the entire axial extent of the inner part 4 and only ends shortly before the bottom 20 of the inner part 4 . In the area of the bottom 20, the outer wall 18 of the inner part 4 is closed by a bridge 44, which gives the inner part 4 additional stability. The length 1 of the groove is preferably 50% to 95% of the length L of the inner part 4 and the bridge accordingly preferably has a width B of 50% to 5% of the length L of the inner part 4 . For further stabilization, the end of the inner part 4 facing the base 20 has a rib 46 which runs in the axial direction of the bearing 2, ie is perpendicular to the base 20. The axial extent of the rib 46 is approximately 10% to 50% of the length L of the inner part 4. In the radial direction, the extent of the rib 46 is limited by the wall 18 of the inner part 4, with the rib 46 being connected to the outer wall 18 of the inner part 4 connected (see also 5b , which shows a plan view of the inner part 4 in the axial direction). The inner part 4 and the rib 46 are preferably made in one piece and solid.

6a shows an insert holder 24 with a base 26, a holding element 28 and a stop 32 in plan view. 6b shows a cross section through the insert holder 24 in the area of the base 26 along the line VIb/VIb. Of the 6b it can be seen that the base 26 is connected to the stop 32 via a web 36 . In the 6a the contour of the web 36 is shown in dashed lines. The length of the web 36 largely corresponds to the length of the slot 42 in the sleeve 4 and runs in the axial direction of the insert holder 24 or the finished bearing 2. Insert holder 24 and stop 32 are formed in one piece. This can also be done in this exemplary embodiment in that the stop 32 and the insertion holder 24 are connected to one another in a form-fitting or material-locking manner. Preferably, however, the stop 32 and the male retainer 24 are solid and made of a single material.

7 shows bearing 2 according to FIG 4 with inserted insert holder 24 according to 6 in cross section. The insert holder 24 is pushed into the inner part 4 in such a way that the base 26 of the insert holder 24 is non-positively connected to the wall 18 of the inner part 4 and the web 36 of the insert holder 24 (see 6b ) in the slot 42 of the inner part 4 (see 5 ) runs. The stop 32 is positioned and dimensioned exactly as it is in connection with the description of the figures 3 has been described. The bridge 44 engages a groove between the base 26 of the male holder 24 and the stop 32 . Furthermore, the rib 46 engages in a groove 48 of the base 26 of the insertion holder 24 .

Reference List

2

warehouse

4

inner part

8th

elastomer body

12

bump stops

14

bump stops

16

elastomer ring

18

Wall

20

floor

22

line

24

plug-in holder

26

base

28

holding element

30

through hole

32

attack

34

rear end

36

web

38

surface

40

surface

42

slot

44

Bridge

46

rib

48

groove

Claims (5)

Bearing (2) for a motor vehicle, which contains the following components: - an inner part (4), - an outer part (6) which includes the inner part (4), - an elastomeric body (8) which connects the inner part (4) with the outer part (6) via at least two spring legs (10a, 10b) and which has a stop buffer (12) located on the outer part (6), - a stop (32) which is placed between the inner part (4) and the outer part (6) is arranged in such a way that the stop buffer (12) is prestressed, an insert holder (24) being pushed into the inner part (4) and the stop (32) being constructed in one piece together with the insert holder (24), characterized in that the stop ( 32) is designed as a tongue-like projection which - runs in the axial direction of the bearing (2) and - rests with the surface (38) facing the inner part (4) on the outer wall (18) of the inner part (4), and with the surface (40) facing away from the inner part (4) on the elastomer body (8). maybe Bearing (2) for a motor vehicle claim 1 , characterized in that the stop (32) and the insertion holder (24) are made solid and consist of a single material. Bearing (2) for a motor vehicle, which contains the following components: - an inner part (4), - an outer part (6) which includes the inner part (4), - an elastomeric body (8) which connects the inner part (4) with the outer part (6) via at least two spring legs (10a, 10b) and which has a stop buffer (12) located on the outer part (6), - a stop (32) which is placed between the inner part (4) and the outer part (6) is arranged such that the stop buffer (12) is prestressed, an insert holder (24) being pushed into the inner part (4) and the stop (32) being constructed in one piece together with the insert holder (24), characterized in that - the stop (32) is connected to the insert holder (24) via at least one web (36) running largely in the axial direction, and the inner part (4) has at least one slot (42) running largely in the axial direction, and the insert holder (24) such is pushed into the inner part (4) that the St eg (36) in the slot (42). Bearing (2) for a motor vehicle claim 3 , characterized in that the slot (42) is shorter than the inner part (4), so that the outer wall (18) of the inner part (4) in the region of the slot (42) is closed by a bridge (44). Bearing (2) for a motor vehicle according to one of claims 3 until 4 , characterized in that the inner part (4) has at its end a rib which runs in the axial direction of the bearing (2).

Images