DE102016215755A1 - Strut bearing with plain bearings - Google Patents

Abstract

The invention relates to a suspension strut bearing (1) for a motor vehicle having a first bearing half (2) for connection to a chassis of a motor vehicle and a second bearing half (3) rotatably mounted relative to the first bearing half (2) for receiving a spring, wherein between the first Bearing half (2) and the second bearing half (3) a sliding disc (4) is arranged, and with a between the first bearing half (2) and the second bearing half (3) arranged seal (5), wherein the sliding disc (4) as a Two-component component (6) is formed together with the first bearing half (2) or the second bearing half (3), and wherein the sliding disc (4) consists of a first thermoplastic material.

Description

The invention relates to a suspension strut bearing for a motor vehicle according to the preamble of claim 1.

Strut bearings are part of the suspension of independent wheel suspensions of motor vehicles. The suspension supports the driving safety and driving dynamics as well as the driving comfort of the motor vehicle as a suspension component and enables precise steering behavior of the wheels. The suspension should keep vibrations away from the vehicle chassis and thus keep the rolling noise low. In order to have a positive influence on the vehicle dynamics, the suspension should be as light as possible. Strut bearings are often part of a so-called McPherson suspension, wherein the strut forms an assembly comprising a shock absorber, a steering knuckle, a ball joint and a coil spring, which is stretched between two spring plate. The suspension strut bearing is provided with a closing element, preferably a cap, which is attached to a chassis-side strut tower. The strut bearing further includes a guide ring on which the shock absorber spring is supported and through which the shock absorber spring is guided. The guide ring is rotatably mounted relative to the end element. For this purpose, a bearing is provided in the suspension strut bearing, which may be designed as a sliding bearing or as a rolling bearing. The strut bearing can transmit both axial and radial forces. Thus, the strut bearing allows when steering a rotation of the spring relative to the vehicle body, since when turning the entire strut rotates.

From the DE 10 2013 210 313 A1 a shock absorber bearing for a motor vehicle with a cap is known, wherein the strut bearing has a relative to the cap rotatably mounted guide ring and a seal, wherein between the cap and the guide ring, a sliding bearing is arranged and wherein the seal between the sliding bearing and the cap is provided and the sliding bearing forms a part of the seal. A disadvantage of such a solution, however, is that the plain bearing is formed of three components and thus an increased installation effort is necessary.

The object of the invention is to propose a suspension strut bearing for a motor vehicle, which is designed as a plain bearing and which is characterized by a particularly simple assembly and low friction.

The object is achieved by a suspension strut bearing for a motor vehicle having a first bearing half for connection to a chassis of a motor vehicle and a bearing half rotatably mounted relative to the first bearing half for receiving a spring, wherein between the first bearing half and the second bearing half a sliding disk is arranged, and a seal disposed between the first bearing half and the second bearing half, wherein the sliding disk is integrally formed as a two-component member together with the first bearing half or the second bearing half, and wherein the sliding disk is made of a first thermoplastic material. A sliding disk of a thermoplastic material, in particular of a polyamide (PA), a polyethylene (PE), a polyoxymethylene (POM) or a polyetheretherketone (PEEK) is particularly suitable for being able to be made in one piece with a bearing half of the suspension strut bearing in an injection molding process , Alternatively, the sliding disk can also consist of a polytetrafluoroethylene (PTFE) or a thermoplastic material with PTFE content. Such a thermoplastic material has good sliding properties with a suitable friction partner, so that the friction in the plain bearing of the suspension strut bearing is reduced.

The features listed in the dependent claims advantageous improvements and developments of the suspension strut bearing specified in the independent claim are possible.

In a preferred embodiment of the invention it is provided that the friction partner of the sliding disk consists of a second thermoplastic material, which is different from the first thermoplastic material of the sliding disk. By the appropriate choice of two different thermoplastic materials, a particularly lightweight suspension strut bearing with minimized friction coefficient can be produced on the overlapping sliding surfaces.

In a further development of the invention, it is provided that a film is arranged between the sliding disk and a mating surface on the other housing half, which consists of polytetrafluoroethylene (PTFE) or has a PTFE component. PTFE has a particularly pronounced friction-reducing effect, so that the friction in the plain bearing can be reduced by such a film. In addition, films made of PTFE or with a proportion of PTFE can be produced and processed comparatively inexpensively.

In an advantageous development of the invention, it is provided that the two-component component comprises the sliding disk and a base body of a material reinforced with glass fibers or glass balls. As a result, a correspondingly high strength can be achieved in the main body, so that the base body is only slightly deformed under load and thus the risk of tilting or bending of the sliding disk connected to the main body is reduced.

The various embodiments of the invention mentioned in this application are, unless otherwise stated in the individual case, advantageously combinable with each other.

The invention will be explained below in embodiments with reference to the accompanying drawings. Show it:

1 an end portion of a strut having a strut bearing;

2 a suspension strut bearing according to 1 wherein parts of the labyrinth seal are made of Gleitscheibenmaterial;

3 an alternative embodiment of a strut with a strut bearing;

4 a suspension strut bearing according to 3 wherein parts of the labyrinth seal are made of Gleitscheibenmaterial;

5 another end portion of a strut with a strut bearing;

6 a suspension strut bearing according to 3 , wherein the labyrinth seal is made of Gleitscheibenmaterial;

7 a further end portion of a strut bearing according to the invention, wherein between the sliding disc and the opposite half bearing a film for minimizing friction is inserted.

1 shows a suspension strut bearing 1 for a motor vehicle, which is designed as a sliding bearing. The suspension strut bearing 1 has a first, upper half bearing 2 for connection to a chassis of a motor vehicle and one opposite the first half bearing 2 rotatably mounted second lower bearing half 3 for connection to a spring. The second half of the warehouse 3 is as a two-component component 6 integral with a sliding washer 4 formed of the sliding bearing. Between the second half of storage 3 and the first half of the warehouse 2 is a seal 5 , in particular a labyrinth seal 10 designed to prevent dirt from entering the suspension strut bearing 1 to prevent. The second half of the warehouse 3 has a first section 11 which is substantially parallel to the sliding disk 4 runs and a second section 12 which is substantially perpendicular to the sliding disk 4 and parallel to a central axis 13 the suspension strut bearing 1 runs. At the first section 11 is an opening 14 provided to a one-piece connection of the second half bearing 3 with the sliding washer 4 to enable. On the sliding disk 4 is a sliding surface 15 formed, which a counter surface 7 at the first half of the warehouse 2 facing so that the first half of the bearing 2 on this sliding surface 15 can rotate. The sliding disk 4 is made of a first thermoplastic material, preferably a polyamide (PA), for example PA6, PA12 or PA66, a polyethylene (PE) or polyethylene terephthalate (PET), a polyoxymethylene (POM), a polyetheretherketone (PEEK) or a polytetrafluoroethylene (PTFE) executed.

In 2 an alternative embodiment of the invention is shown, wherein in substantially the same structure as 1 additionally described at least a portion of the labyrinth seal 10 through the material of the sliding disk 4 is trained. This is the sliding washer 4 extended in the radial direction outwards, wherein the sliding disk 4 Webs forms, which with webs of the first half of the camp 2 the labyrinth seal 10 form.

3 shows a further embodiment of a suspension strut bearing 1 , With essentially the same structure as 1 described, in this embodiment, the sliding disk 4 of the plain bearing integral with the first half bearing 2 the suspension strut bearing 1 as a two-component component 6 educated. Here is the opening 14 at the first half of the warehouse 2 provided to a one-piece connection of the sliding washer 4 with the first half of the warehouse 2 the suspension strut bearing 1 to enable. It is on the sliding disk 4 a sliding surface 15 provided, which a counter surface 7 the second half of the bearing 3 is facing.

In 4 an alternative embodiment of the invention is shown, wherein in substantially the same structure as 3 additionally described at least a portion of the labyrinth seal 10 through the material of the sliding disk 4 is trained. These are on the sliding disk 4 Webs formed, which with webs of the second half bearing 3 the labyrinth seal 10 form.

In 5 is another strut camp 1 shown. With essentially the same structure as 1 and 3 executed, is both at the first half of the bearing 2 as well as at the second half of the warehouse 3 the suspension strut bearing 1 one sliding washer each 4a . 4b educated. Both are the first half of the bearing 2 as well as the second half of the warehouse 3 each as a two-component component 6 formed, each in the bearing halves 2 . 3 an opening 14a . 14b located to a one-piece connection of the sliding washers 4a . 4b with the respective components 2 . 3 to enable. It is at the first bearing half 2 connected sliding disk 4a a sliding surface 15 provided, which on a sliding surface 16 the sliding disk 4b the second half of the bearing 3 slides and in particular can rotate relative to each other. There are the two sliding discs 4a and 4b preferably made of different thermoplastic materials, a friction-minimized sliding of the sliding surfaces 15 . 16 to enable each other.

In 6 an alternative embodiment of the invention is shown, wherein in substantially the same structure as 5 described the labyrinth seal 10 through the material of the sliding disk 4 is trained. These are both sliding washers 4a . 4b extended radially outwards and form outside of the sliding surfaces 15 . 16 the labyrinth seal 10 out.

7 shows a suspension strut bearing 1 for a motor vehicle, which is designed as a sliding bearing. The suspension strut bearing 1 has a first, upper half bearing 2 for connection to a chassis of a motor vehicle and one opposite the first half bearing 2 rotatably mounted second lower bearing half 3 for connection to a spring. The second half of the warehouse 3 is as a two-component component 6 integral with a sliding washer 4 the suspension strut bearing 1 educated. Between the second half of storage 3 and the first half of the warehouse 2 is a seal 5 in the form of a labyrinth seal 10 designed to prevent dirt from entering the suspension strut bearing 1 to prevent. The second half of the warehouse 3 has a first section 11 which is substantially parallel to the sliding disk 4 runs and a second section 12 which is substantially perpendicular to the sliding disk 4 and parallel to a central axis 13 the suspension strut bearing 1 runs. At the first section 11 is an opening 14 provided to a one-piece connection of the second half bearing 3 with the sliding washer 4 to enable. On the sliding disk 4 is a sliding surface 15 formed, which a counter surface 7 at the first half of the warehouse 2 is facing. Between the sliding surface 15 and the counter surface 7 is a foil 9 arranged, which consists of a PTFE material or has a proportion of PTFE material and thus to minimize friction between the sliding disk 4 and the counter surface 7 contributes. The foil 9 can during the assembly of strut mount 1 between the two bearing halves 2 . 3 are inserted, whereby a simple installation of the film is possible.

LIST OF REFERENCE NUMBERS

1

 Strut mounts

2

 first half of the warehouse

3

 second half of the warehouse

4

 sliding disk

5

 poetry

6

 Two-component part

7

 counter surface

8th

 body

9

 foil

10

 labyrinth seal

11

 first section

12

 second part

13

 central axis

14

 opening

15

 sliding surface

16

 sliding surface

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102013210313 A1 [0003]

Claims (4)

Suspension strut bearing ( 1 ) for a motor vehicle having a first half of the bearing ( 2 ) for connection to a chassis of a motor vehicle and one opposite the first half of the bearing ( 2 ) rotatably mounted second bearing half ( 3 ) for receiving a spring, wherein between the first half of the bearing ( 2 ) and the second half of the bearing ( 3 ) a sliding disk ( 4 ), and with one between the first half of the bearing ( 2 ) and the second half of the bearing ( 3 ) arranged seal ( 5 ), characterized in that the sliding disc ( 4 ) as a two-component component ( 6 ) together with the first half of the bearing ( 2 ) or the second half of the bearing ( 3 ) is formed, wherein the sliding disc ( 4 ) consists of a first thermoplastic material. Suspension strut bearing ( 1 ) according to claim 1, characterized in that the friction partner of the sliding disk ( 4 ) consists of a second thermoplastic material, which of the first thermoplastic material of the sliding disc ( 4 ) is different. Suspension strut bearing ( 1 ) according to claim 1 or 2, characterized in that between the sliding disk ( 4 ) and a counterface ( 7 ) on the other housing half ( 2 . 3 ) a film ( 9 ), which has a polytetrafluoroethylene portion. Suspension strut bearing ( 1 ) according to one of claims 1 to 3, characterized in that the two-component component ( 6 ) the sliding disk ( 4 ) and a basic body ( 8th ) comprises a material reinforced with glass fibers or glass balls.

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