DE3909052A1 - Rubber-metal bush, in particular for supporting a stabiliser bar on a motor vehicle - Google Patents

Abstract

The invention relates to a rubber-metal bush, in particular for supporting a stabiliser bar (6) on a motor vehicle, having outer bearing half-shells (2, 3) capable of being clamped together and forming a receiving eye, having a one-piece rubber-metal element (7) inside the receiving eye, which encloses the stabiliser bar (6) and can be radially clamped in the receiving eye (2, 3). The rubber-metal element (7) consists of a flexible metal strip (8) with rubber layers (9, 10) vulcanised-on on both sides and with a substantially axially extending through-gap. According to the invention, provision is made for at least one part of the metal strip (8) to protrude at the gap without rubber coating and to be bent approximately in a radial direction, so that a metallic tongue (11, 12) projecting radially over the outer rubber layer (9) is formed. A pocket-shaped recess (15) for receiving and fastening the tongue (11, 12) is provided on at least one of the half-shells (2, 3). The tongue (11, 12) is additionally fastened in the axial direction in the recess (15) by the axial boundary surfaces thereof. Consequently, during the fitting precise axial adjustment and fastening inside the receiving-eye region is achieved in the case of the rubber-metal element (7) and, in addition, the tongue parts (11, 12) act as axial stops when the rubber-metal element (7), under loading, has a tendency to travel laterally out of the region of the receiving eye. <IMAGE>

Description

The invention relates to a rubber-metal socket, in particular for the storage of a stabilizer bar on a motor vehicle according to the preamble of claim 1.

In a known stabilizer bearing (DE-OS 26 08 553) who the two rubber metal elements as rubber metal half shells the stabilizer bar placed and between two bearings clamped shells, which form a receiving eye. The rubber each metal element consists of a rubber half-shell one vulcanized to the inside and outside of it metallic half shell. The outer metal half shells of the Rubber metal elements are concentric before installation to the inner and become concentric during installation bent until the end faces of the outer metal half-shells stand on each other. The wall thicknesses of the outer metal half shells of the rubber metal elements are so strong that their facing end faces the total pressure the clamped bearing shell halves of the receiving eye endure and the outer metal half-shells on their circumference do not buckle. Due to the strong dimensioning of the outer  Metal half shells can be of any thickness during assembly be pinched.

This known stabilizer bearing is required because of thick-walled outer shell relative expensive. The assembly of this stabilizer bearing is also not complicated, but not completely without problems: A fitter has a free half-shell with a frame to connect the fixed half-shell with screws and thereby the two separate rubber-metal half shells around the stabilizer rod to place and between the bearing half shells of the receptacle eyes, which requires skillful handling.

Another known stabilizer bearing (DE-OS 33 27 817) is cheaper and easier to assemble. Also outer, collapsible bearing half-shells form here Shooting eye. There is a one-piece within the receiving eye Rubber metal element arranged around the stabilizer bar closes and is radially clamped in the receiving eye. The Rubber metal element consists of a flexible metal strips with vulcanized rubber layers on both sides. The one-piece rubber metal element essentially contains one axially extending, continuous gap at which it can be bent open is. In a known embodiment, the rubber metal element a sand before assembly, especially a planner Strips of appropriate length, around the stabilizer bar is wrapped. This winding can be beneficial Measures, for example by extending in the axial direction Notches or studs can be provided in the rubber layers, these notches when tightening the receiving eye in Rubber can be closed again.

In another embodiment, the rubber metal element already preformed and vulcanized cylindrically and is used in assembly only slightly bent at the gap, from the Put it on the stabilizer bar and connect it ßend with the bearing half shells of the receiving eye radially tied together.  

With this in itself functional, inexpensive and a In practice, stabilizer bearings can be assembled The following problems occur: If the rubber metal element not clean and exactly within the axial length of the up is mounted, the outer rubber layer of the Rubber metal elements on the face of the receiving eye stand. With gimbal loads, everyone is supported Deflection of the edge of the receiving eye in the outer rubber stratifies so that a large force component in axial direction tion is exerted on the rubber metal element. This can do that cause the rubber metal element successively from the up the eye is pushed out and swung out over time different.

In contrast, the object of the invention is to be the last written, generic camp with simple measures like this to further develop that an axial migration of the rubber metal is prevented from the eye. In addition an assembly aid is to be provided.

This task is carried out with the characteristic features of the contractor spell 1 solved.

According to claim 1 it is proposed that at least the gap part of the metal strip without a rubber layer stands and is bent approximately in a radial direction. This protruding metal strip part should protrude so far that he protrudes radially over the outer rubber layer and one protrudes de tab forms. At least one of the camp should continue shells contain a pocket-shaped recess in which the Tab is inserted during assembly for fixation.

This has the advantage that the rubber metal part during assembly is determined in its position opposite the eye. With appropriate attachment of the tab and the recess on the receiving eye, it is not possible to use the rubber metal element to mount in the axial direction so imprecisely that by the effect mentioned at the beginning of this from the area of the recording  emigrated over time. The seitli also work Chen edges of the tab in the pocket-shaped recess as Stops so that in spite of a precise installation tendency of the rubber metal element to emigrate axially this is held securely within the receiving eye and is fixed.

The tab can also ge in the circumferential direction in the recess hold or be clamped, but it has been shown that it is essential for the function and durability is the recess in the bearing shell in their Width to make larger than the tab thickness. Thereby lies the tab on the side walls of the recess is not on and should have so much play there that with a torsional load of the Bearing the tab in its corresponding movement in circumference direction is not disabled. Also in the axial direction the tab does not fit tightly after assembly, but have some play (claim 2).

The recess for receiving the tab is according to claim 3 advantageous by one or both sides step-shaped savings formed on the contact surfaces of the bearing half-shells. On the one hand, this has the advantage that the cutouts are simple are producible and on the other hand the tab (or how claimed below several tabs or tab parts) when clamping the half-shells into the recess drawn in.

In a preferred embodiment according to claim 4 Gap both opposite metal strip ends without Rubber layer pad before and are to the invention Straps bent in the radial direction. This will both Longitudinal margins defined via tabs.

According to claim 5, the two metallic tabs are across from each other. But you shouldn't touch each other. This can by a suitable diameter or circumference of the rubber metal elements can be realized.  

With the features of claim 6 is achieved that tabs from both metal strip ends in the axial direction one behind the other that can lie in a line and do not overlap. This can, for example, the width of the recess on the Bearing half shells can be kept low. It is necessary for this Lich that the tabs or tab parts of a metal strip fenenden occupy a certain axial length range and the tabs of the other metal strip end have other axial lengths occupy opposite areas. For example, this can be such that a first tab lies in an axial half and in the second axial half a second tab. But it can other configurations may be formed, with tab parts approximately interlocking, without overlapping nen.

According to claim 7, the flexible metal strip for formation of the tabs or the two end tabs in width leave the rubber metal element free without rubber layers. This production is very simple and inexpensive but changes that the receiving eye is axially longer, since it is the pocket-shaped recess for receiving the tab must contain in their length.

If the eye, e.g. for space reasons, the gum Tall element should not protrude axially, with claim 8 proposed that the tabs or tab parts on the face side far reset that a corresponding recess inside half of a receiving eye in the axial length of the rubber metal elements can be provided.

For technical reasons, it should usually be be appropriate, only a slot-shaped recess for the To include a tab or several tab parts. Depending on the application, it can also be useful to use several tab parts according to claim 9, which in several assigned, pocket-shaped recesses on the receptacle intervene eye.  

An increase the durability in a manner known per se de measure is that the radial height of the rubber layers towards their outer ends in the axial direction Claim 10 increases.

A problem when tightening the bearing half shells can are that when putting on half-cylinder bearing half shells on the outer rubber layer of the rubber metal elements and rubber during the subsequent clamping process presses between the contact surfaces of the bearing half-shells. The Contact surfaces are then no longer directly on top of each other, but via a rubber layer pressed in between. These Intermediate rubber layer can change over time set so that the clamping screws for the half bearing can loosen shells. With the features of the claims 11 to 14, however, the following measures are proposed: According to claim 11, the bearing is in the area of the contact surfaces a recess is provided on the inner surface of the half-shells, in which rubber can expand when tightened so that it does not get directly between the contact surfaces. The These recesses are in the area of the pocket-shaped recess created for the tabs anyway.

In another embodiment according to claim 12, the thickness the outer rubber layer of the rubber metal element (im not tensioned condition) reduced in the area of the contact surfaces. As a result, when the bearing half-shells are clamped together in the loading rich the contact surfaces of the rubber of the outer rubber layer no longer through the edges of semi-cylindrical bearings shell displaced that rubber ge between the contact surfaces reaches. After tightening, however, the Be range of the contact surfaces of the rubber to the rubber layer so far pressed together that the rubber layer there with about con passes through minute thickness. But for the function it is also irrelevant if here in the outer rubber layer (just as in the area of the tabs) a recess or Slot is present. This reduction in the rubber layer thickness  can be easily carried out during the vulcanization process and is cheaper in terms of production technology than the production of with claim 11 proposed recess in the metalli half shells. It can also be seen on one Side a recess can be provided in the half shells and on the other side the outer rubber layer in hers Reduced thickness or also provided with a recess be.

A manufacturing, simple and for the course of the exterior Ren rubber layer in the clamped state favorable form arises with the features of claim 13, in which Circular section is provided in the area of the contact surfaces. A broad wedge shape has proven particularly favorable Claim 14 proved.

An elastic and acoustically favorable support of the tabs is achieved within the pocket-shaped recesses, by according to claim 15 with the tabs or tab parts are covered with a thin rubber film.

Six embodiments of the Er finding with further details, features and advantages explained in more detail.

It shows

Fig. 1 shows a cross section through a first embodiment of an elastic bearing along the line BB of Fig. 2,

Fig. 2 is a longitudinal section through the elastic bearing according to Fig. 1 along line AA,

Fig. 3 is a longitudinal section of a tab portion of a second embodiment,

Fig. 4 shows a longitudinal section through a tab portion of a third embodiment,

Fig. 5 is a cross section of a tab portion of a fourth and fifth embodiment of FIGS. 6 and 7,

Fig. 6 shows a longitudinal section through a tab area of a fourth embodiment and

Fig. 7 is a longitudinal section of a tab portion of a fifth embodiment,

Fig. 8 is a plan view in the axial direction of a rubber metal element in the untensioned state of a sixth embodiment.

In Fig. 1 a cross section through an elastic bearing 1 is shown with outer, collapsible half-shells 2 and 3 (the clamping elements or clamping screws are not shown in detail NEN), which form a receiving eye with cylindrical Boh tion and on contact surfaces 4 , 5th lie together in the tensioned state. The half-shells 2 , 3 comprise a cylindrical stabilizer bar 6 , a one-piece rubber metal element 7 being introduced between the stabilizer bar 6 and the half-shells 2 , 3 .

The rubber metal element 7 consists of a flexible metal strip 8 , on which an outer rubber layer 9 and inner rubber layer 10 are vulcanized. In the fully assembled, illustrated state, the rubber metal element 7 or the rubber layers 9 , 10 are clamped radially through the half-shells 2 , 3 , so that the rubber-metal element 7 is non-rotatably connected to the stabilizer bar 6 and the two half-shells 2 , 3 under frictional adhesion and all relative movements in the bearing molecularly recorded in the rubber layers 9 , 10 who the.

In the embodiment of FIGS. 1 and 2, the metal strip 8 is extended on both end sides over the circumference of the rubber metal element 7 without a rubber layer support to two radially projecting tabs 11 , 12 extending beyond the outer rubber layer 9 .

At the push of the contact surfaces 4 of the half-shells 2, 3 are in each half-shell step-shaped recesses 13, 14 formed, resulting in collapsed half-shells 2, 3 is a bag-shaped, slot-like axially extending recess 15 °. This recess 15 is delimited at the end by surfaces 16 , 17 .

The tabs 11 , 12 protrude into this recess 15 . The Gummime tallelement 7 is dimensioned so that in the clamped state, the flat opposite tabs 11 , 12 do not lie against each other, but a space is formed between them. The width of the recess 15 is chosen so large that the tabs 11 , 12 do not come into contact with the limitation of the recess at a Drehbe load, but can move freely. As can be seen from Fig. 2, the front edges of the tabs 11 , 12 should have a game to the axial Limitation surfaces of the recess 15 after assembly.

The illustrated bearing according to FIGS. 1 and 2 has the following function: For assembly, the rubber-metal element 7 , which is provided in cylindrical form, is bent on the tabs 11 , 12, plugged onto the stabilizer bar 6 from the side and around the stabilizer bar 6 again approximately zugebo conditions. Then the two half-shells 2 , 3 are placed, the rubber-metal element 7 is rotated so that the tabs 12 , 13 engage in the recess 15 . As a result, the rubber-metal element 7 in particular is axially correctly fixed in the area of the receiving eye formed by the half-shells 2 , 3 during assembly. A not exact placement of the half-shells 2 , 3 in such a way that the rubber-metal element 7 would protrude beyond the half-shells 2 , 3 after assembly in the axial direction is practically not possible because of the axial boundary surfaces 16 , 17 of the recess 15 . As already mentioned at the beginning, such an axial protrusion of the rubber metal element 7 beyond the half-shells 2 , 3 could lead to a lateral migration of the rubber metal element 7 over time. The tabs 11 , 12 thus provide effective assembly aids by simple means that prevent this danger. Should there be a tendency for the rubber metal element to migrate laterally from the receiving eye, the tabs 11 , 12 act as limiting stops on the axial limiting surfaces 16 , 17 of the recess 15 .

In the first embodiment according to FIGS. 1 and 2 speaks ent the axial length of the recess 15 and corresponding to the length of the tabs 11 , 12 of the axial length of the rubber element elements 7 , ie the flexible metal strip 8 is in its entire axial extent for the tabs 11 , 12 used . From Fig. 2 it can be seen that as a result of the necessary axial boundary surfaces 16 , 17, the receiving eye 15 must be axially longer than the rubber metal element. 7

In a second embodiment according to FIG. 3, tabs 18 shortened in their axial length are therefore proposed, so that, as can be seen from FIG. 3, the half-shells 2 , 3 correspond in their total axial length to the length of the rubber metal element 7 . This can be useful with limited installation space.

The third embodiment according to FIG. 4 essentially corresponds to the first embodiment, but here the tabs 11 , 12 are not continuous over the entire length, but rather two tabs 11 a and 11 b or 12 a and 12 on the two sides b are formed which engage in correspondingly short recesses 15 a and 15 b .

In the fourth embodiment according to FIG. 6, a first tab 19 (corresponding to the tab 11 from FIGS. 1 and 2) and a tab 20 (corresponding to the tab 12 from FIGS. 1 and 2) are arranged in a continuous recess 15 . The tabs 19 and 20 have only slightly less than half the length of the recess 15 and are in a left and right th area of the recess 15 so that they do not overlap pen.

In the fifth embodiment according to FIG. 7, a tab 21 (corresponding to the tab 11 in FIGS. 1 and 2) lies in a central region of the recess 15 and a left and right region 22 a and 22 b of the second tab (corresponding to the Tab 12 from FIGS. 1 and 2) lies in the side areas of the recess 15 , these tab parts likewise not overlapping.

By appropriate dimensioning of the Gummimetallele element in the embodiments of FIGS . 6 and 7 who can achieve that the tabs 19 , 20 and the tab parts 22 a , 22 b and 21 are in axial alignment, as cut in cross section Fig. 5 is shown. The embodiment according to FIG. 4 could also be designed accordingly, the tab parts 12 a and 12 b drawn in there having to be assigned to a different end side of the rubber metal element 7 , so that there is a similar structure to that in FIG. 6.

With such an aligned arrangement of the tab parts, it is practically impossible for tab parts to be adversely affected by the ends of the gap in the rubber metal element when the bearing is loaded. The width of the Ausneh tion 15 can be reduced. Otherwise, these embodiments also function in accordance with the first embodiments, where two tabs 11 , 12 , 18 lie flat opposite one another. It can be seen that, in a simple embodiment, the essential functions are also achieved if only one tab, for example only the tab 11 (without tab 12 ) is provided on only one end side of the rubber metal element.

In Fig. 8 is a plan view in the axial direction on a rubber metal element 7 of a sixth embodiment is shown in the non-tensioned state. The outer rubber layer 9 and inner rubber layer 10 as well as the metal strip 8 can also be seen here. The metal strip 8 is also bent here to protruding tabs 11 , 12 . The tabs 11 , 12 are, however, pulled over with a thin rubber film 24 .

In order to prevent an unfavorable pressing of rubber between the contact surfaces 4 and 5 of the bearing half-shells 2 and 3 , a wedge-shaped recess 23 was provided in the embodiment of FIG. 1, which is achieved by a corresponding folding of the bearing half-shells 2 , 3 . After the clamping process, this recess 23 is filled with rubber of the outer rubber layer 9 as shown.

In the embodiment of FIG. 8, another measure is provided by reducing the outer rubber layer 9 in the area of the tabs 11 , 12 and opposite each other by a circular section 25 and 26 in their layer thickness. The halves of the chords of the circular sections are set against each other at a small angle 27 , so that a wide, wedge-shaped circular section results. It is clear that this means that when the bearing half-shells are put on and during the clamping process, no more rubber is pressed under the contact surfaces of the bearing half-shells 2 , 3 , even if they are made without recesses 23 in a half-cylinder shape. Only when tightening the rubber pushes itself so far together in the area of the contact surfaces that an approximately continuous outer rubber layer is formed in the area of the Kreisab section 26 , here too, just as in the area of the tabs 11 , 12 a constriction or interruption the rubber layer does not interfere with the good functioning of the rubber-metal bush.

Claims (15)

1. rubber-metal bushing, in particular for the mounting of a stabilizer bar on a motor vehicle,
with outer, collapsible bearing half shells that form a receiving eye,
with a one-piece rubber-metal element within the receiving eye, which encloses an inner part to be stored, in particular the stabilizer rod, and which is radially clampable in the receiving eye and
the rubber-metal element consists of a flexible metal strip with vulcanized rubber layers on both sides, with an essentially axially running through the gap, characterized in that
that at least part of the metal strip ( 8 ) protrudes from the gap (without a rubber layer support) and is bent approximately in a radial direction, so that a metallic tab ( 11 , 12 ; 18 ; 19 , 20 ; 21 ) radially projecting beyond the outer rubber layer ( 9 ) , 22 ) is formed, and
that on at least one of the half-shells ( 2 , 3 ) a pocket-shaped recess ( 15 ) for receiving and fixing the tab ( 11 , 12 ; 18 ; 19 , 20 ; 21 , 22 ) is provided. 2. Rubber-metal socket according to claim 1, characterized in that the recess ( 15 ) on the bearing half-shell ( 2 , 3 ) is greater in width than the thickness of the tabs, so that the tab on the side walls of the recess is not is present and is not hindered in its corresponding movement when the bearing is subjected to rotational loads and the tab in the recess ( 15 ) is fixed by axial boundary surfaces ( 16 , 17 ). 3. Rubber-metal bushing according to claim 1 or 2, characterized in that the pocket-shaped recess ( 15 ) by abutting, step-shaped recesses ( 13 , 14 ) on contact surfaces ( 4 ) of the bearing half-shells ( 2 , 3 ) is ge. 4. rubber-metal bushing according to one of claims 1 to 3, characterized in that the two opposite metal strip ends protrude at the gap and approximately in a radial direction to form two metallic tabs ( 11 , 12 ; 18 ; 19 , 20 ; 21 , 22 ) are bent. 5. rubber-metal socket according to claim 4, characterized in that the two metallic tabs ( 11 , 12 ; 18 ) are opposite with their surfaces, but do not touch. 6. rubber-metal bushing according to claim 4, characterized in that the metallic tab ( 19 ) or more formed te tab parts ( 22 a , 22 b ) of a metal strip end occupy certain axial length ranges and the metallic tab ( 20 ) or more formed tabs parts ( 21 ) of the other end of the metal strip take the other axial lengths within the recess ( 15 ), so that no overlap of tab parts occurs. 7. rubber-metal bushing according to one of claims 1 to 6, characterized in that the axial extension of the tab or the tabs ( 11 , 12 ) or a plurality of adjacent tab parts ( 12 a , 12 b ; 19 , 20 ; 22 a , 21 , 22 b ) corresponds to the axial length of the rubber metal element ( 7 ), the receiving eye ( 2 , 3 ) with axial boundary surfaces ( 16 , 17 ) of the pocket-shaped recess ( 15 ) limiting the lateral edges of the tab arrangement and in its axial length projects beyond the rubber-metal element ( 7 ). 8. Rubber-metal socket according to one of claims 1 to 6, characterized in that the tabs ( 18 ) or tabs parts are reset on the front side. 9. rubber-metal socket according to one of claims 1 to 6, characterized in that a plurality of tab parts ( 12 a , 12 b ) are provided which engage in a plurality of associated, taschenför shaped recesses ( 15 a , 15 b ). 10. rubber-metal socket according to one of claims 1 to 9, there characterized in that the radial height of the rubber layer towards their outer ends in the axial direction takes. 11. Rubber-metal bushing according to one of claims 1 to 10, characterized in that in the area of the contact surfaces ( 4 , 5 ) of the bearing half-shells ( 2 , 3 ) on their inner surface radially outwardly extending recesses ( 23 ) seen before are. 12. Rubber-metal bushing according to one of claims 1 to 11, characterized in that in the region of the contact surfaces ( 4 , 5 ) of the bearing half-shells ( 2 , 3 ) the thickness of the outer rubber layer ( 9 ) of the rubber metal elements ( 7 ) in not clamped state by recesses ( 25 , 26 ) is reduced. 13. rubber-metal bushing according to claim 12, characterized in that the reduction in the thickness of the outer layer ( 9 ) is carried out in such a way that seen in the axial direction of the annular outer rubber layer ( 9 ) a circular section ( 25 , 26 ) is missing, which extends up to the metal strip ( 8 ). 14. A rubber-metal bushing according to claim 13, characterized in that half of the tendons of the circular section are set at a small angle ( 27 ) against one another, so that there is a broad, approximately wedge-shaped circular section ( 25 , 26 ). 15. Rubber-metal socket according to one of claims 1 to 14, characterized in that the tabs or tab parts are covered with a thin rubber film ( 24 ).