Stabilizer, in particular electromechanical roll stabilizer for a motor vehicle

Abstract

To prevent noise generated by the electromechanical actuator of the stabilizer from being transmitted into the passenger compartment when passing through a zero position, the stabilizer tube is designed as a so-called star profile, which is filled with elastomer in the indentations between the points of the star profile, thereby reducing structure-borne noise transmission into the passenger compartment.

Description

[0001] The invention relates to a stabilizer, in particular an electromechanical roll stabilizer for a motor vehicle according to the preamble of claim 1.

[0002] DE 10 2005 049 147 A1 discloses a stabilizer tube with a non-circular cross-section, such as a star-shaped or triangular profile. WO 2012 / 090 010 A2 represents further state of the art.

[0003] The object of the invention is to create a stabilizer for a motor vehicle with which structure-borne noise transmission into the vehicle body can be reduced.

[0004] This problem is solved according to the invention by the features of claim 1. Further advantageous features are included in the dependent claims.

[0005] The main advantages achieved with the invention are that, through an optimized profile shape of the stabilizer tubes, their circumferential surface area is increased to reduce structure-borne noise. According to the invention, this is achieved by designing the tube halves of the stabilizer or roll stabilizer as star profiles in cross-section. These star profiles have external indentations between circumferential points, each of which is filled with an elastomer. When filled, the indentations between the points of the star profile form a circular cross-section of the tube halves.

[0006] The star profile of the stabilizer tubes increases the circumferential area for a higher spring rate, and the applied elastomer significantly reduces structure-borne noise transmission into the passenger compartment.

[0007] An electromechanical actuator of the roll stabilizer between the stabilizer tubes causes disruptive noises, such as a rattling sound from a gearbox in the actuator, and these rattling noises are transmitted as structure-borne sound via the stabilizer tubes and an attached connecting rod into the passenger compartment, which is significantly reduced by the elastomer applied to the tube halves.

[0008] In particular, the elastomer is vulcanized into the indentations between the points of the star profile of the pipe halves. Another type of connection is also conceivable.

[0009] An embodiment of the invention is shown in the drawings and is described in more detail below.

[0010] They show: Fig. 1 a schematic representation of a stabilizer or a roll stabilizer with an actuator arranged between tube halves of the stabilizer and Fig. 2 a cut along line II-II of the Fig. 1 through one tube half of the stabilizer with applied elastomer in indentations between the teeth of the star profile of the stabilizer.

[0011] A stabilizer 1 for a motor vehicle, in particular an electromechanical roll stabilizer, has an actuator A between two stabilizer tube halves 2, 3.

[0012] The subsequent pipe halves 2, 3 of the stabilizer 1 each have a cross-sectional shape as a so-called star profile 4. Between the circumferential teeth 5 of the star profile 4, outer indentations 6 are filled with elastomer 7.

[0013] The indentations 6 are filled with the elastomer 7 in such a way that, after filling, a circular cross-section of the pipe halves 2, 3 results, which in Fig.Figure 2 is shown in more detail with a dashed outline. In particular, the elastomer 7 is attached to the indentation 6 of the star profile 4 by a process called vulcanization. An equivalent joining method, e.g., by adhesive bonding, is also possible.

[0014] The external elastomer 7 applied to the indentations 6 of the star profile 4 prevents or significantly reduces structure-borne noise resulting from rattling of the gears of the actuator A's gearbox via the stabilizer tubes 2, 3 and the connected connecting rod 8 into the passenger compartment.

Claims

[1] Stabilizer, in particular an electromechanical roll stabilizer for a motor vehicle for coupling two wheels of a vehicle axle, consists of two tube halves, between which an actuator of the stabilizer is arranged, characterized by , that the tube halves (2, 3) of the stabilizer (1) are each formed in cross-section as a star profile (4) which has external indentations (6) between circumferential teeth (5) which are each filled with an elastomer (7). [2] Stabilizer according to claim 1, characterized by , that the indentations (6) between the points (5) of the star profile (4) form a circular cross-section of the tube halves (2, 3) when filled. [3] Stabilizer according to claim 1 or 2, characterized by , that the elastomer (7) is vulcanized into the indentations (6) of the star profile (4) of the tube half (2, 3). [4] Stabilizer according to claims 1, 2 or 3, characterized by, that the external elastomer (7) arranged in the indentations (6) between the teeth (5) of the star profile (4) is designed to reduce structure-borne sound transmission from the tube halves (2, 3) into the passenger compartment.

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