SE1451439A1 - Stabilizer, in particular for the compensation of body rollmovements in utility vehicles - Google Patents

Description

Figure 1 Stabilizer, in particular for the compensation of body roll movements in utility vehicles The invention relates to a stabilizer, in particular for 5 the compensation of body roll movements in utility vehicles, having a spine part and having leg parts which are arranged at mutually opposite ends of the spine part and which are angled relative to the spine part, said leg parts being acted on by a force at their ends facing away 10 from the spine part, with the spine part being subjected to torsion.

A stabilizer of said type which is used in motor vehicles to improve the road positioning of the vehicle as it travels around bends is known from EP 2 524 827 Al, wherein the mode of operation of said stabilizer - as follows - is explained in the cited document.

In a vehicle, a body roll stabilizer connects the opposite wheels of an axle by way of the leg parts, which each form levers, and the spine part, which acts as a torsion spring. When travelling around bends, a spring-compression movement of the wheel at the outside of the bend and a spring-extension movement of the wheel at the inside of the bend generate a torque which causes torsion in the torsion spring, wherein the stressing of the spring has the effect that the stabilizer counteracts body roll of the vehicle body in the bend.

In a known manner, as described in EP 2 524 827 Al, the torsion spring is formed by a torsion bar. The central part, referred to as the spine, of the body roll stabilizer is in this case mounted rotatably on the body, and the angled leg parts, which act as levers, are attached directly or indirectly to the wheel control elements, for example to transverse arms.

In the case of active body roll stabilizers, the spine may be formed by two stabilizer halves which may be formed by a split torsion bar. Between those ends of the torsion bar parts which face toward one another there is arranged a so-called actuator which actively generates torsion of the two torsion bar parts relative to one another. In the case of passive body roll stabilizers, different degrees of spring compression at the wheels of a transverse vehicle axis are compensated exclusively by the torsion of the spine part, wherein the torsion section may extend over a major part of the entire width of the vehicle. 10 With regard to the connection between the spine part and the leg parts, EP 2 524 827 Al mentions merely that the leg parts are connected in torsionally rigid fashion to the two ends, facing away from one another, of the torsion bar that forms the spine part. In this regard, in practice, to ensure high component strength and functional reliability, the entire stabilizer is, in the case of utility vehicles, of unipartite and solid form, which is disadvantageously associated with a high mass- to-performance ratio.

The invention is based on the object, in the case of a stabilizer of the type mentioned in the introduction, of reducing the mass-to-performance ratio while ensuring 25 high component strength and functional reliability.

According to the invention, this is achieved in that the spine part is in the form of a tube, in that the leg parts are in the form of sheet-metal moulded parts, and in that the leg parts are fastened in each case to the free ends of the spine part by way of a non-positively locking and positively locking connection.

By means of this lightweight design according to the invention, it is advantageously possible for the weight of the stabilizer to be reduced, wherein, for example through dimensioning of the tube wall thickness and/or the tube diameter, it is possible to set a resistance moment, which counteracts the torsional loading, of the spine part which is equivalent to that of the solid cross section of a torsion bar. It is also possible for the weight of the leg parts to be reduced, preferably with a C-shaped configuration of the cross section thereof at least in regions, wherein it is advantageously possible, for example through dimensioning of the various wall thicknesses in the C shape, to set a resistance moment, which counteracts the bending load, equivalent to that of a solid cross section. The non-positively locking and positively locking connection between the leg parts and the free ends of the spine part ensures in this case a functionally reliable transmission of forces and moments from the leg parts to the spine part.

For optimization of the transmission of forces and moments, it may be provided here in a preferred embodiment that the non-positively locking and positively locking connection is formed in each case by engagement of an external contour formed on the end of the spine part into an internal contour, of matching shape, of a fastening opening of the leg part, said fastening opening being situated in the region of that end of said leg part which faces toward the spine part. It is advantageous here if the external contours of the ends of the spine part and the internal contours of the fastening openings of the leg parts are in each case polygons, preferably regular polygons, particularly preferably regular polygons with rounded corners, wherein, by implementing the contours as concave polygons with rounded corners, the magnitude of the forces or moments that can be transmitted in functionally reliable fashion can be increased yet further in relation to an implementation of the contours as convex polygons with rounded corners.

Here, in concave polygons, the rounded corners situated in each case at the outside can be formed by in each case convexly curved sections and the rounded corners situated in each case at the inside can be formed by in each case concavely curved sections of the external contours of the ends of the spine part and of the internal contours of the fastening openings of the leg parts. Here, rectilinear contour sections can be avoided, such that convexly curved sections and concavely curved sections alternate in the external contours and internal contours. Here, the curvatures yield a maximization of the areas of contact between the internal and external contours of the components, which is to be regarded as particularly optimal in particular with regard to the tangential direction of action of the forces to be transmitted via the connection. In this regard, it may in particular also be provided that the convexly curved sections are more intensely curved than the concavely curved sections.

For a simple geometrical design of the contours, it may be provided that the curvature of the convexly curved sections and the curvature of the concavely curved sections are each described by circular arcs whose radii in the convexly curved sections are preferably smaller than the radii in the concavely curved sections. It may however also be provided that the respective curvature of the convexly curved sections and of the concavely curved sections is described by shortened cycloids.

The functional reliability of the transmission of forces and moments from the leg parts to the spine part, and the stability of the connection between said parts, may furthermore advantageously also be influenced through the provision of a fastening section which surrounds the fastening opening of the leg part in the manner of a sleeve and the length of which determines the connection between a respective leg part and a free end of the spine part. The greater the length of said fastening section, the larger also the area of contact between the leg part and spine part, wherein, if the force or torsional moment to be transmitted remains the same, the contact pressure acting between the parts decreases, or in the case of an admissible contact pressure being predefined as a limit value, the magnitude of the force or moment to be transmitted can be increased.

The non-positively locking and positively locking connection between the leg parts and the free ends of the spine part can advantageously be realized in a particularly stable form by virtue of a plug being inserted into the tube cavity of the spine part, the external contour of which plug is matched to the internal contour of the tube cavity of the spine part. A plug of said type stabilizes and secures the connection additionally from the inside and prevents deformation of the tube wall in the working state of the stabilizer.

Here, to increase the force component in the non-positively locking and positively locking connection, it may advantageously be provided that the external contour of the plug has, at least in regions, an oversize in relation to the internal contour of the tube cavity of the spine part in its state before the insertion of the plug. As a result of the insertion of a plug designed in this way into the spine part, the internal contour and, with at least slight wall deformation, also the external contour of the tube are flared, thus generating increased contact pressure between the external contour of the free end of the spine part and the internal contour of the fastening opening of the leg part.

From the aspect of desired substantial ease of installation of the plug, it may be provided here that the external contour of the plug is of conical form at least in regions over the axial plug length, wherein, in particular, said external contour exhibits play with respect to the internal contour of the tubular spine part in the region of the plug tip, which is situated in the tube interior in the installed state, and said external contour exhibits an oversize with respect to the internal contour of the tubular spine part in the region of the outer plug end.

Further advantageous design features of the invention emerge from the dependent claims and from the following description. The invention will be explained in more detail on the basis of an exemplary embodiment according to the invention illustrated in the appended drawing, in which: Figure 1 shows an embodiment of a stabilizer according to the invention in a perspective exploded illustration, Figure 2 shows the embodiment of a stabilizer according to the invention illustrated in Figure 1, in the assembled state and in plan view, Figure 3 shows a side view of Figure 2, Figure 4 shows, on an enlarged scale in relation to Figure 3, a view from below of a leg part of the embodiment of a stabilizer according to the invention illustrated in Figures 1 to 3, Figure 5 shows an axial longitudinal section through the leg part along the line V-V in Figure 4, Figure 6 shows, in an enlarged illustration, a concave polygon with rounded corners, as is provided in the external contours of the spine part and in the internal contours of the leg parts of the embodiment of a stabilizer according to the invention illustrated in Figures 1 to 5, Figure 7 shows a Cartesian coordinate system with the depiction of a curve by which the edge profile of a concave polygon with rounded corners in the external contours of the spine part and in the internal contours of the leg parts of a stabilizer according to the invention can be described, Figures 8a and 8b show a concave polygon and a further contour obtained from said polygon by rounding of its corners, by which further contour the external contours of the spine part and the internal contours of the leg parts of a stabilizer according to the invention can be described.

With regard to the following description, it is expressly stated that the invention is not restricted to the exemplary embodiment, and in this case is also not restricted to all or several of the features of described combinations of features. Rather, each individual sub- feature of the exemplary embodiment may also be of inventive significance on its own, separately from all of the other sub-features described in conjunction therewith, and in combination with any other features.

In the figures of the drawing, identical parts and parts which correspond to one another are also always denoted by the same reference signs, such that they will each generally also be described only once.

As can firstly be seen from Figures 1 to 3, a stabilizer 1 according to the invention, which can be used in particular for the compensation of body roll movements in utility vehicles, has a spine part 2 and two leg parts 3 arranged at mutually opposite ends 2a, 2b of the spine part 2.

The spine part 2, with the longitudinal axis X-X, is in the form of a tube which may preferably be composed of spring steel, whereas the leg parts 3 are sheet-metal moulded parts.

The leg parts 3 are angled relative to the spine part 2 5 and each have ends 3a facing toward the spine part 2 and ends 3b facing away from the spine part 2. The angled leg parts 3, which act as levers, are, in the assembled state, attached directly or indirectly to the wheel control elements, for example to transverse arms, from which the 10 leg parts 3 receive a force F (see Figures 1 and 3). Connection to these components that are not illustrated is realized by way of in each case one fastening opening 3c situated on those ends 3b of the leg parts 3 which face away from the spine part 2.

To attain high stability, the leg parts 3 may, as shown in particular in Figures 1, 4 and 5, have a C-shaped or - depending on the viewing direction - U-shaped cross section at least in regions.

The force F firstly causes a bending moment B (see Figures 1 and 3) to be generated in the leg parts 3 and then, owing to the lever action of the leg parts 3, causes a torsion moment MT (see Figures 1 and 2) to be generated in the spine part 2, which torsion moment must be transmitted via a connection between the leg parts 3 and the spine part 2. Said connection between the leg parts 3 and the spine part 2 is a non-positively locking and positively locking connection, for which possible specific designs will be explained in detail below.

The non-positively locking and positively locking connection may preferably be formed in each case by engagement of an external contour KA formed on the end of the spine part 2 into an internal contour KI, of matching shape, of a fastening opening 3d of the leg part 3, said fastening opening being situated in the region of that end 3a of said leg part which faces toward the spine part 2.

The external contours KA of the ends 2a, 2b of the spine part 2 and the internal contours KI of the fastening openings 3d of the leg parts 3 may in particular each be polygons, preferably regular polygons, particularly preferably regular polygons with rounded corners.

A polygon of said type has in this case at least three corners, wherein an upper limit of 20 should preferably be provided for the number of corners, in particular in the case of concave polygons, because in the case of a higher number, the contour would become too finely structured and would come to resemble a toothing, which is undesirable because optimum transmission of moments would thus no longer be possible.

Details regarding a contour that is preferred according to the invention can be seen in Figure 6 which, in an enlarged illustration, firstly generally shows a polygon with rounded corners. A similar polygon with a greater number of corners is also shown in Figure 8b.

Since the contour illustrated in the drawing may be characteristic, and for the exemplary embodiment as per Figures 1 to 5 is characteristic, of the external contours KA on the spine part 2 and also of the internal contours KI of the leg parts 3 of a stabilizer 1 according to the invention, said contour is merely denoted in general fashion in Figure 6 (and also the other figures) by the reference sign K (instead of reference signs KA and KI).

In particular, the contour K shown in Figure 6 is a concave regular decagon with rounded corners. The outermost and innermost points of the rounded corners are denoted by the reference signs P1 to P10, wherein the odd-numbered points Pl, P3, P5, P7, P9 are situated radially at the outside and the even-numbered points P2, P4, P6, P8, P10 are situated radially at the inside. It can be derived from Figure 6 that regular concave polygons each have an even number of at least six rounded corners Pl, P2, P3,..., half of which (P1, P3,_), in the external contour KA of the ends 2a, 2b of the spine part 2 and in the internal contours K1 of the fastening openings 3d of the leg parts 3, are situated in each case at the outside and half of which (P2, P4,...) are situated in each case at the inside.

Both the outer points Pl, P3,_ and the inner points P2, P4,_ can be combined with one another, forming respective pentagons. In the figure, by way of example, the points 21 and P3 situated at the outside are connected to one another by a straight line G. The straight line G intersects the contour curve at two points Wl, W2. In a mathematical sense, said points represent the points of inflection of the curve, at which the direction of curvature of the curve changes in each case.

The straight line G divides the contour K between the two points P1 and 23 into three sections Al, A2, A3, with the inner point 22 being situated in the middle section A2, and the outer points P1 and P3 being situated in the two Al, A3. The contour K is concavely curved in the middle section A2, and is convexly curved in the two Al, A3.

From this, it is clear firstly that, in the regular concave polygon that is shown, the rounded corners Pl, P3,_ situated in each case at the outside may be formed by in each case convexly curved sections Al, A3,_, and the rounded corners P2,_ situated in each case at the inside may be formed by in each case concavely curved sections A2,_, of the external contours KA of the ends 2a, 2b of the spine part 2 and of the internal contours KI of the fastening openings 3d of the leg parts 3, such that convexly curved sections Al, A3,_ and concavely curved sections A2,_ alternate in the respective contours K.

Here, in the embodiment illustrated, the sections Al, A2, A3 on the straight line G are all of approximately the same length, wherein the contour K has a more intense curvature in the convexly curved sections Al, A3 than in the concavely curved section A2. The curvature of the convexly curved sections Al, A3 and the curvature of the concavely curved section A2 may in this case each be approximately described by circular arcs whose radii R1, R3 in the convexly curved sections Al, A3 are preferably smaller than the radius R2 in the concavely curved section A2.

Figure 7 illustrates a further advantageous option for the configuration of the profile of the contour in the polygons. It is also possible for the respective curvature of the convexly curved sections Al, A3 and of concavely curved sections, such as section A2, to be described by curves which are referred to in mathematics as "shortened cycloids".

Here, it can be seen from Figure 7 that a cycloid is, in mechanical terms, generated as the path of a point P which is fixedly connected to a circle at a radius a from the central point M of the circle when said circle rolls on a straight line without sliding. If the rolling angle is denoted by p, the circle rolls on the x axis of a Cartesian coordinate system and the numbering of the abscissa begins at 0 when the point P is at its lowest position, which corresponds for example to the position of the points Pl, P3,_ in Figures 6 and 8b, the developed arc (distance OH on the abscissa) is equal to the product of the radius r and the rolling angle p. Said arc is longer, by the value a * sin p, than the x coordinate of the point P in the developed state P', and the radius r is greater, by the value a * cos 9, than the y coordinate. At this location, the point P' thus has the following coordinates: x=r*9-a* sin (ID, and y = r - acos (p.

If the ratio a : r, by means of which, within the context of the invention, the curve profile of the contour K and, in this case, in particular the curvature and the curvature ratio of the convex and concave sections Al, A2, A3,_ thereof can be controlled, is less than 1, this is referred to as a shortened cycloid.

Through the selection of the type and value of the 15 curvatures and of the mutual ratios of convex and concave curvatures - for example through variation of the radii R1, R2, R3in Figure 6 or the variables a and r in Figure 7 - it is possible here, even with different geometric values of, for example, the outer diameter D of the spine part 2 or the effective lever length Ll of the leg parts 3 of a stabilizer 1 according to the invention (see Figure 2), to realize a maximization of the areas of contact between the internal contours KI and the external contours KA of the components 2, 3, which constitutes a major advantage in particular with regard to the tangential direction of action of the moment MT to be transmitted via the connection.

A further possibility for targetedly influencing the transmission of forces and moments consists in that the non-positively locking and positively locking connection between a respective leg part 3 and a free end 2a, 2b of the spine part 2 extends over a length L2 determined by the length L2 of a sleeve-like fastening section 3e which surrounds the fastening opening of the leg part, as can be seen most clearly from Figure 5. As can be seen from Figure 1, the fastening section 3e may likewise be of tubular form.

It has already been stated in the introduction that, with the length L2 of said fastening section 3e, the area of contact between leg part 3 and spine part 2 also 5 increases. As a result, if a force F or torsion moment MT to be transmitted remains the same, the acting contact pressure between the parts 2, 3 decreases, or in the case of an admissible contact pressure being predefined as a limit value, the magnitude of the force F or moment MT 10 to be transmitted can be increased.

Insofar as the non-positively locking and positively locking connection is formed in each case by engagement of the external contour KA of the spine part 2 into the internal contour KI, of matching shape, of the fastening opening 3d of the leg part 3, this shape matching should not, according to the invention, be understood to mean complete congruence; it may also be provided that the force component of the non-positively locking and positively locking connection between the leg part 3 and the free end 2a, 2b of the spine part 2 is defined by an interference fit of the external contour KA of the spine part 2 in the internal contour KI of the fastening opening 3d of the leg part 3. This means that the external contour KA of the spine part 2 may, before assembly, have a slight oversize in relation to the internal contour KI of the fastening opening 3d of the leg part 3.

Furthermore, as shown in Figure 3 and also particularly clearly in the exploded illustration of Figure 1, a plug 4 may be insertable or inserted into each end of the tube cavity 2c of the spine part 2, the external contour AS of which plug is matched to the internal contour IR of the tube cavity 2c of the spine part 2. The internal contour IR of the tube cavity 2c of the spine part 2 may in this case advantageously follow - separated by the wall thickness s - the external contour KA of the spine part 2. It is advantageously the case here that, to generate an interference fit between the external contour KA of the free end 2a, 2b of the tubular spine part 2 and the internal contour KI of the fastening opening 3c of the leg part 3 (Figure 3), the external contour AS of the 5 plug 4 may have, at least in regions, an oversize in relation to the internal contour IR of the tube cavity 2c of the spine part before the insertion of the plug 4 (Figure 1). It may also be provided that the external contour AS of the plug 4 is of conical form at least in 10 regions over the axial plug length LS. The advantages associated with these technical features have already been explained above.

A person skilled in the art may also supplement the 15 invention with further advantageous technical measures without departing from the scope of the invention.

For example, the leg parts 3 may be produced in unipartite form, in particular by way of a cold-working process, for example by deep drawing, from a low-carbon standard steel that can be used for general purposes in mechanical engineering, such as for example a steel with the material number 1.0580 in accordance with DIN EN 10 0007, sheet 2 (September 1992).

The polygonal external contour KA, which deviates from the normal circular ring-shaped tube cross-sectional shape, and simultaneously also the adequate internal contour IR, described above as being preferable, may be imparted to the spine part 2, which is preferably - as mentioned - composed of a spring steel and likewise of unipartite form, in particular by way of a hot-forming process. In this case, the standard tube cross-sectional shape may optionally be tapered or - as can be seen from Figures I and 2 - preferably flared, which can be realized with little outlay from a technological aspect.

The plug 4 may advantageously - even in a conical embodiment - be manufactured by way of an out-of-round turning process. For this purpose, commercially available CNC turning machines can be retrofitted with special machining heads. The plug 4 may be composed of a general structural steel or of a tool steel. The external contour AS of the plug 4 and the internal contour of the spine part 2 may - as illustrated in the drawing - preferably involve contours K that are geometrically similar to the polygonal external contours KA of the spine part 2 and the polygonal internal contours KI of the leg parts 3. This is however not imperatively necessary.

As shown in Figure 8a, it is basically also possible in the context of the invention for the polygonal contours K also to be formed without rounded corners, though this may reduce the effect desired within the context of the object on which the invention is based.

As can finally be seen from Figure 2, and as illustrated by way of example for the left-hand end 2b in the drawing, annular spine bearings 5 which circumferentially surround the spine part 2 may be arranged on each of the ends 2a, 2b of the spine part 2, said spine bearings performing not only the bearing and support function for the spine part 2 but also the function of absorbing circumferential and axial forces. The spine bearing 5 illustrated by way of example is in this case shown in section. For the spine bearings 5, it may advantageously be provided that these are seated at least in regions on the unround, that is to say non-circular, in particular polygonal, external contour KA of the ends 2a, 2b of the spine part 2, wherein an inner annular contour KR of the spine bearing 5 is matched in terms of shape to said external contour KA and encloses the latter in positively locking fashion. In this way, the spine bearings 5 are seated very securely on the spine part 2, and the spine part 2 is secured so as to be prevented from slipping - that is to say performing a relative rotation with respect to the spine bearing 5 - under the action of the torsion moment MT. At the same time, with the same action, the spine bearings 5 may be seated at least in regions also on an external contour AB of the fastening section 3e, wherein it may advantageously be provided for the fastening section 3e that the external contour AB thereof follows - separated by its wall thickness d (in this regard, see Figure 1) - the unround internal contour KI of the fastening section 3e.

The fact that the spine part 2 is in the form of a tube, that the leg parts 3 are in the form of sheet-metal moulded parts, and that the leg parts 3 are fastened in each case to the free ends 2a, 2b of the spine part 2 by way of a non-positively locking and positively locking connection, leads to a further advantage, with regard to the mounting by way of the spine bearings, in relation to the known solid and unipartite form of a stabilizer.

To avoid notch stresses at the transition between leg part and spine part - that is to say specifically where the bearings are supposed to be arranged - the known stabilizers must be of heavily rounded form. Such rounding is advantageously not necessary according to the invention. Instead, the spine bearings 5 can be arranged directly in a non-rounded corner region formed by a respective leg part 3 and the spine part 2, wherein, in said corner region, the longitudinal axis X-X of the spine part 2, which is simultaneously that of the stabilizer 1 according to the invention, and the longitudinal axis Y-Y (Figure 3) of the leg part 3 are at right angles to one another. The spine bearing 5 may in this case advantageously bear by way of its face side against an inner surface, denoted in Figure 4 by the reference sign IF and extending perpendicular to the axial direction X-X, of the leg part 3. The axial absorption of force by the spine bearings 5 is improved in this way.

As is also indicated in Figure 2 by that region of the spine bearing 5 which is illustrated using dashed lines, the spine bearing 5 may in this case advantageously be 5 arranged in a space formed within the C-shaped cross section of the leg part 3 around the fastening section 3e, and in a preferred embodiment the spine bearing also fills said space. In this way, the spine bearing 5 can perform a similar function to the plug 4 described above. 10 Whereas the plug 4 stabilizes the connection between spine part 2 and leg part 3 from within the spine part the spine bearing 5 can stabilize said connection from outside the spine part 2 and the fastening section 3e. Here, the assembly process may take place such that, firstly, the spine bearing 5 is positioned on the fastening section 3e of the leg part 3, then the tube end 2a, 2b of the spine part 2 is inserted by way of its external contour KA into the internal contour KI of the leg part 3, and finally the plug 4 is inserted by way of its external contour AS into the internal contour IR of the spine part 2. By means of a corresponding conicity of the plug 4, it is possible here not only - as already described - to produce an interference fit of the spine part 2 in the fastening section 3e of the leg part 3, but also the fastening section 3e may itself be flared such that the spine bearing 5 is compressed. Here, said spine bearing may at one side be seated by way of its internal contour KR on the external contour AB of the fastening section 3e and/or on the external contour KA of the spine part 2 with matching shape and with an interference fit; said spine bearing may at the other side be arranged, at least over a circumferential region of preferably at least 180° - circumferential angle p in Figure 4 - and likewise with an interference fit, within the contour, of C-shaped cross section, of the leg part 3 in the region of the end 3a of the leg part 3. In this way, the entire connecting region between the spine part 2 and leg part despite a lightweight construction of the two components, is of compact form and exhibits maximum strength under the loads that occur during use, which are characterized by a multi-axial stress state defined in particular by forces in the three spatial axes, by the bending moment B on the leg part 3 and by the torsion moment MT about the longitudinal axis of the stabilizer 1 according to the invention.

Furthermore, the invention is not restricted to the combination of features defined in claim 1, but may also be defined by any other desired combination of particular features of all of the individual features disclosed. This means that basically practically any individual feature of the independent claim may be omitted or replaced by at least one individual feature disclosed at some other point in the application.

Reference signs OBDeveloped arc length on x (Figure 7) 1Stabilizer 2Spine part of 1 2a, 2bEnds of 2 2cTube cavity of 2 3Leg part 3a, 3bEnds of 3 3cFastening opening of 3 for wheel control elements 3dFastening opening of 3 for 2 3eFastening section around 3d 4Plug for 2 Spine bearing for 2 Al, A2, A3 Sections on G (Figure 6) ABExternal contour of 3e ASExternal contour of 4 aRadius of P (Figure 7) Bending moment generated by F Wall thickness of 3e Force on 3 Straight line between 91 and P3 (Figure 6) IFInternal surface of 3 around 3e (Figure 4) IRInternal contour of 2 at 2a, 2b Contour, general (KA, KI, IR, AS) KAExternal contour of 2 (2a, 2b) KIInternal contour of 3 (3d) KRInner annular contour of LiLever length of 3 L2Length of 3e LSAxial length of 4 Circle central point (Figure 7) MTTorsion moment generated by F in 2 Point (general, Figure 7) P'Point P (position after development) P1 ... 914Polygon points (Figures 6, 8a, 8b) R1, R2, R3 Radii of K in Al, A2, A3 (Figure 6) • sWall thickness of 2 Wl, W2Points of inflection on G X-XLongitudinal axis of 1 Y-YLongitudinal axis of 3 (Figure 3) cpRolling angle (Figure 7) 1-1Circumferential angle of 3 in the region of 3a

Claims (20)

1. 0 15 20 25 30 35 _2l_ Claims Stabilizer (l), in particular for the compensation of body roll movements in utility vehicles, having a spine part (2) and having leg parts (3) which are arranged at mutually opposite ends of the spine part (2) and which are angled relative to the spine part (2), said leg parts being acted on by a force (F) at their ends (3b) facing away from the spine part (2), with the spine part (2) being subjected to torsion, characterized in that the spine part (2) is in the form of a tube, in that the leg parts (3) are in the form of sheet-metal moulded parts, and in that the leg parts (3) are fastened in each case to the free ends (2a, 2b) of the spine part (2) by way of a non- positively locking and positively locking connection. Stabilizer (l) according to Claim l, characterized in that the non-positively locking and positively locking connection is formed in each case by engagement of an external Contour (KA) formed on the end of the spine part (2) into an internal contour (KI), of Inatching' shape, of a fastening opening (3d) of the leg part (3), said fastening opening being situated in the region of that end (3a) of said leg part which faces toward the spine part (2). Stabilizer (1) according to Claim l or 2, characterized in that the leg parts (3) have a C- shaped cross section at least in regions. Stabilizer (1) according to Claim 2 or 3, characterized in that the external contours (KA) of the ends (2a, 2b) of the spine part (2) and the internal contours (KI) of the fastening openings (3d) of the leg parts (3) are in each case polygons, 10 l5 20 25 30 35 _22.. preferably regular polygons, particularly preferably regular polygons with rounded corners. Stabilizer (l) according to Claim 4, characterized in that the regular polygons each have at least three and at most 20 rounded corners. Stabilizer (l) according to one of Claims 2 to 5, characterized in that the external contours (KA) of the ends (2a, 2b) of the spine part (2) and the internal contours (Kl) of the fastening openings (3d) of the leg parts (3) are concave polygons with rounded corners. Stabilizer (1) according to Claim 6, characterized in that the concave polygons each have an even number of at least six rounded corners, half of which, in the external contour (KA) of the ends (2a, 2b) of the spine part (2) and in the internal contours (KI) of the fastening openings (3d) of the leg parts (3), are situated in each case radially at the outside and half of which are situated in each case radially at the inside. Stabilizer (l) according to Claim 7, characterized in that, in the concave polygons, the rounded corners situated in each case at the outside are formed by in each case convexly curved sections (Al, A3) and the rounded corners situated in each case at the inside are formed by in each case concavely curved sections (A2) of the external contours (KA) of the ends (2a, 2b) of the spine part (2) and of the internal contours (KI) of the fastening openings (3d) of the leg parts (3), such that, in particular, convexly curved sections (Al, A3) and concavely curved sections (A2) alternate in the external contours (KA) and internal contours (KI). 10 15 20 25 30 35 10. ll. 12. 13. _23_ Stabilizer (1) according to Claim 8, characterized in that the convexly curved sections (A1, A3) are than the concavely curved sections more intensely curved (A2). Stabilizer (1) characterized in that the curvature of the convexly (A1, A3) according to Claim 8 or 9, curved sections and the curvature of the concavely curved sections (A2) are each described by circular arcs whose radii (R1, R3) in the convexly curved sections (A1, A3) are preferably smaller than the radii (A2). (R2) in the concavely curved sections Stabilizer (1) characterized in that the respective curvature of the convexly curved sections (A1, A3) and of the (A2) is described by according to Claim 8 or 9, concavely curved sections shortened cycloids. Stabilizer (1) according to one of Claims 1 to ll, characterized in that the non-positively locking and positively locking connection between a respective leg part (3) and a free end (2a, 2b) of the spine part (2) extends over a length (L2) which is defined by the length (L2) of a sleeve-like fastening section (3e) that surrounds the fastening opening (3d) of the leg part. Stabilizer (1) according to one of Claims 1 to 12, characterized in that the force component of the non-positively locking and positively locking connection between a respective leg part (3) and a (2a, 2b) by an interference fit of the external contour (KA) (2a, 2b) free end of the spine part (2) is defined of the free end of the spine part (2) in 10 15 20 25 30 35 14. 15. 16. 17. 18. _ 24 _ (KI) of the leg part (3). the internal contour (3d) of the fastening opening Stabilizer (1) according to one of Claims 1 to 13, characterized in that a plug (4) is inserted into each end of the tube cavity (2c) of the spine part (2), the external contour (AS) of which plug is matched to the internal contour (IR) of the tube cavity (2c) of the spine part (2). Stabilizer (1) characterized in that, according to Claim 14, to generate an interference fit between the external contour (KA) of the free end (2a, 2b) of the spine part (2) and the internal contour (KI) of the fastening opening (3d) of the leg part (3), the external contour (AS) of the plug (4) has, at least in regions, an oversize in relation to the internal contour (IR) of the tube cavity (2c) of the spine part (2) before the insertion of the plug (4). Stabilizer (1) according to Claim 14 or 15, characterized in that the external contour the plug (4) over the axial plug length (AS) of is of conical form at least in regions (LS). Stabilizer (1) characterized in that annular spine bearings (5) according to one of Claims l to 16, which circumferentially surround the spine part (2) are arranged on each of the ends (2a, 2b) of the spine part (2). Stabilizer (1) according to Claim 17, characterized. in that each. spine bearing (5) is seated, preferably with an interference fit, at least in regions on the external contour (KA) of the end (2a, 2b) of the spine part (2), wherein an inner (KR) annular contour of the spine bearing (5) is 10 15 20 19. 20. _25_ matched in terms of shape to said external contour (KA) and encloses the latter in positively locking fashion. Stabilizer (1) characterized in that each spine bearing (5) is according to Claim 17 or 18, arranged in a corner region which is formed by a respective leg part (3) and the spine part (2) and (X-X) (Y-Y) in which the longitudinal axis part (2) of the spine of the leg (3) are at right angles to one another, wherein and the longitudinal axis part the spine bearing (5) preferably bears by way of its (IF), (X-X), face side against an inner surface extending perpendicular to the axial direction of the leg part (3). Stabilizer (1) characterized in 'that each spine bearing (5) is according to one of Claims 17 to 19, arranged in a space formed within the C-shaped cross section of the leg part (3) (36), spine bearing also fills said space, around the fastening section and in a preferred embodiment each particularly preferably with an interference fit.