DE102016216598A1 - Strut mounts - Google Patents

Abstract

Strut bearing with a cap (2) and with respect to the cap (2) about a rotation axis (D) rotatably mounted guide ring (3) and with at least one seal, wherein between the cap (2) and the guide ring (3) has a plain bearing ( 4), wherein the sliding bearing (4) has a first sliding element (5) and a second sliding element (6).

Description

Field of the invention

The invention relates to a suspension strut bearing, which is intended for use in struts.

Background of the invention

Strut bearings are part of the suspension for independent suspension. The suspension supports a desired driving safety and driving comfort, as well as easy and precise steering of the wheels. The suspension should keep road noise from the structure and be as light as possible. Depending on the version, the suspension strut bearing guides the shock absorber spring and forms a support surface for the shock absorber end stop. The strut bearing absorbs the transmitted via the shock absorber spring or the shock absorber radial and axial forces and ensures that the shock absorber spring during steering and compression twisted friction and tension free and thus operates without restoring moment.

Strut bearings are often part of the so-called McPherson struts. The strut consists essentially of spring, shock absorbers and steering knuckle. The strut bearing is provided with a cap which is fixed to the chassis-side strut tower, and with a guide ring on which the shock absorber spring is supported and guided by this. The guide ring is rotatably mounted relative to the cap. The bearing allows steering of the spring relative to the body during steering, as the entire strut rotates during steering movements.

From the DE 10 2010 015 712 A1 a strut bearing is known which has a cap and a rotatable relative to the cap guide ring. Between cap and guide ring a sliding bearing is arranged. The sliding bearing is formed of a sliding element, which is arranged between the guide ring and the cap.

The EP 2 317 167 A1 discloses a strut bearing with a cap, a guide ring and a sliding bearing arranged therebetween. The sliding bearing is inserted in a recess of the guide ring and forms a sliding surface for the cap.

The DE 10 2008 057 590 A1 describes a strut bearing having a cap and a guide ring. The cap and the guide ring are made of metal. Between the cap and the guide ring, a sliding bearing is arranged, which is formed of a synthetic resin.

Summary of the invention

Object of the present invention is to provide a suspension strut available, which is simple and inexpensive to produce.

According to the invention the object is achieved by a strut bearing with a cap and with respect to the cap about a rotation axis rotatably mounted guide ring and at least one seal, wherein between the cap and the guide ring, a sliding bearing is arranged, wherein the sliding bearing a first sliding element and a second Sliding element has.

Strut bearings have a cap and a captive connected by a snap connection with the cap guide ring. Between the cap and the guide ring a bearing is provided. This bearing is designed as a plain bearing.

By means of the cap, the suspension strut bearings are attached to the chassis-side strut tower or the topmount. On the guide ring, a shock absorber spring is supported, which is guided by the guide ring.

The strut bearing according to the invention comprises a sliding bearing, which is constructed of two sliding elements, i. from a first sliding element and a second sliding element. The first sliding element is the cap and the second sliding element is assigned to the guide ring. By such a structure, it is no longer necessary, in contrast to a one-piece sliding bearing, to rework the sliding surface on the cap or the guide ring after manufacture. In addition, when choosing the material to be used for the cap or the guide ring, care must not be taken that this is suitable for forming a sliding surface. As a result, a simple and inexpensive suspension strut bearing can be provided.

According to one embodiment of the invention, the first sliding element is positively or non-positively connected to the cap and the second sliding element positively or non-positively connected to the guide ring. This ensures that rotation takes place only between the first sliding element and the second sliding element.

According to an alternative embodiment of the invention, the first sliding element is sprayed on the cap and the second sliding element on the guide ring. This means that both the cap and the first sliding element as well as the guide ring and the second sliding element each form a single component. This component is designed as a two-component component. The two-component component is manufactured, for example, by means of a two-component injection molding process, in which the two components are materially connected to one another. By such a design of the suspension strut bearing, it is possible to reduce the total number of components of the suspension strut bearing. This has the advantage that material and manufacturing costs can be reduced. On the other hand, the assembly is simplified because only cap and guide ring must be assembled. Occurring positioning errors, which may arise in Montageder, are avoided.

Preferably, the cap and / or the guide ring is formed of a glass fiber reinforced plastic. The glass fiber reinforced plastic ensures the necessary stability and rigidity of the cap or the guide ring. As a glass fiber reinforced plastic, a polyamide, such as a PA66-GF, may be provided. It is also the use of another plastic or metal possible, which has the same properties.

Preferably, the cap and / or the guide ring is formed of a non-reinforced material.

In one embodiment of the invention, the sliding bearing is formed of an unreinforced plastic. As unreinforced example, a polyoxymethylene or a polyethylene can be used. As a result, mixed friction and stick-slip effects can be reduced or prevented.

In one embodiment of the invention, the seal is designed as a labyrinth seal. Preferably, the labyrinth seal is designed as a Merfachlabyrinthdichtung. The cap is designed so that it has at least one protruding board. Analogous to the cap of the guide ring is designed such that it has a protruding board. The cap and the guide ring can interlock by means of the formed ribs, whereby a labyrinth-like structure is formed. This prevents dirt from entering the strut mount, thereby allowing radial suspension of the strut mount. Alternatively, it is also possible to provide a grinding seal instead of a labyrinth seal, in which a sealing lip abuts the guide ring in a grinding manner. Furthermore, a combination of a labyrinth seal and a sliding seal is conceivable. In this case, the abrasive seal may be formed on the outer circumference or in the region of the labyrinth.

According to one embodiment of the invention, the sliding bearing forms part of the labyrinth seal. For this purpose, the two sliding elements are designed such that they each have at least one protruding board aufweisem.Die two sliding elements can interlock by means of the formed ribs, whereby a labyrinth-like structure is formed.

An embodiment of the invention provides that the sliding bearing has at least one recess on its sliding surface. The at least one recess forms a grease or lubricant reservoir. As a result, a continuous supply of the sliding surfaces with grease or lubricant over the service life is ensured, whereby the life of the spring sliding bearing can be increased. The recess (s) may be in the form of grooves, grooves, indentations or the like which extend completely or only partially over the circumference of the sliding bearing.

Preferably, the guide ring may have a reinforcement. This reinforcement can be designed as a sheet metal part, which is injected for example in the guide ring or mounted directly on the contact surface of the shock absorber spring. The advantage of this is that thereby the spring forces can be absorbed without damage from the guide ring. Furthermore, it is possible to mount or spray a sheet metal flange, for example, on the inner circumference of the guide ring, which can absorb resulting Bumpstopkräfte.

Short description of the drawing

Hereinafter, an embodiment of the invention will be illustrated with reference to four figures. Show it

1 a partial longitudinal section through an inventive strut bearing according to a first embodiment,

2 a partial longitudinal section through an inventive strut bearing according to a second embodiment,

3 a partial longitudinal section through an inventive strut bearing according to a third embodiment, and

4 a partial longitudinal section through an inventive strut bearing according to a fourth embodiment.

Detailed description of the drawings

1 shows a longitudinal section through a strut bearing according to the invention 1 according to a first embodiment. The suspension strut bearing 1 has a cap 2 on, as well as a guide ring 3 , the opposite of the cap 2 is rotatably mounted about a rotation axis D around. The cap 2 is with the guide ring 3 by means of a snap connection 3a connected. The cap 2 is attached to a not pictured Domlager a chassis of a motor vehicle. The guide ring 3 takes an axial end of a shock absorber spring, not shown. Spring forces of the shock absorber spring are transmitted via the guide ring 3 in the cap 2 and from there to the cathedral camp.

The guide ring 3 is about a plain bearing 4 at the cap 2 stored axially in the direction of the axis of rotation D. The plain bearing 4 serves for the transmission of forces acting along the axis of rotation D of the guide ring 3 on the cap 2 ,

The plain bearing 4 has a first sliding element 5 and a second slider 6 on. The first sliding element 5 is the cap 2 assigned and can be connected to this non-positively or positively. The second sliding element 6 is the leader ring 3 assigned and can be connected to this non-positively or positively.

Between the guide ring 3 and the cap 2 is a labyrinth seal 7 provided, which preferably as a double labyrinth seal 8th is trained.

This is the cap 2 on its outer periphery with the two coaxial with the axis of rotation D, annularly closed Borden 9 . 10 provided, which has a circumferential annular groove 11 limit. The two in one piece to the cap 2 molded shelves 9 . 10 extend with their free ends in the direction of the guide ring 3 ,

The guide ring 3 is arranged on the outer circumference with two coaxial with the axis of rotation D, annularly closed Borden 12 . 13 provided, which has a circumferential annular groove 14 limit. The two in one piece on the guide ring 3 molded shelves 12 . 13 extend with their free ends towards cap 2 ,

The shelves 9 and 10 are opposite the Borden 12 and 13 arranged radially offset. The board 13 reaches into the ring groove 11 one. The board 9 the cap 2 reaches into the ring groove 14 one.

The 2 to 4 show further embodiments of the invention. For ease of description, like parts will be identified by the same reference numerals as in the preceding 1 , The description is limited only to the distinguishing features of the 1 ,

Unlike the 1 forms in the 2 the plain bearing 4 the labyrinth seal 7 or the double labyrinth seal 8th out.

This is the cap 2 associated first sliding element 5 on the outer circumference with two coaxial with the axis of rotation D, annularly closed Borden 15 . 16 provided, which has a circumferential annular groove 18 limit. The two molded shelves 15 . 16 extend with their free ends in the direction of the second sliding element 6 ,

That the guide ring 3 associated second sliding element 6 is arranged on the outer circumference with two coaxial with the axis of rotation D, annularly closed Borden 18 . 19 provided, which has a circumferential annular groove 20 limit. The two molded shelves 18 . 19 extend with their free ends in the direction of the first sliding element 5 ,

The shelves 15 and 16 are opposite the Borden 18 and 19 arranged radially offset. The board 15 reaches into the ring groove 20 one. The board 19 reaches into the ring groove 17 one.

3 shows a third embodiment of the strut mount according to the invention 1 , In contrast to 1 is at the in 3 shown strut bearing, the first sliding element 5 on the cap 2 and the second slider 6 on the guide ring 6 injected.

The cap is preferred 2 and the guide ring 3 produced in a two-component injection molding process, in which first the cap 2 and the guide ring 3 pre-molded and the first sliding element 5 and the second slider 6 be sprayed with formation of a material bond.

Between the cap 2 and the first slider 5 is an undercut 21 intended. For this purpose, the first sliding element 5 "Poor" 22 on which in the corresponding recesses 23 the cap 2 intervention. The undercut 21 is already produced during the injection molding process.

Likewise, between the guide ring 3 and the second slider 6 an undercut 24 intended. For this purpose, the second sliding element 6 "Poor" 25 on which in the corresponding recesses 26 of the guide ring 3 intervention. The undercut 24 is already produced during the injection molding process.

Between the guide ring 3 and the cap 2 is a labyrinth seal 7 provided, which preferably as a double labyrinth seal 8th is trained. This labyrinth seal 7 corresponds to the already in 1 described labyrinth seal 8th ,

4 shows a fourth embodiment of the strut bearing according to the invention 1 ,

As already in 3 also described in this embodiment, the first sliding element 5 on the cap 2 and the second slider 6 on the guide ring 6 injected.

Unlike the 3 forms in the 4 the first sliding element 5 and the second slider 6 the labyrinth seal 7 or the double labyrinth seal 8th out. The formation of the labyrinth seal 7 corresponds to the in 2 described.

LIST OF REFERENCE NUMBERS

D

 axis of rotation

1

 Strut mounts

2

 cap

3

 guide ring

3a

 snap

4

 bearings

5

 first sliding element

6

 second sliding element

7

 labyrinth seal

8th

 Double labyrinth seal

9

 shelf

10

 shelf

11

 ring groove

12

 shelf

13

 shelf

14

 ring groove

15

 shelf

16

 shelf

17

 ring groove

18

 shelf

19

 shelf

20

 ring groove

21

 undercut

22

 poor

23

 recess

24

 undercut

25

 poor

26

 recess

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 102010015712 A1 [0004]
• EP 2317167 A1 [0005]
• DE 102008057590 A1 [0006]

Claims (10)

Suspension strut bearing with a cap ( 2 ) and with one opposite the cap ( 2 ) about an axis of rotation (D) rotatably mounted guide ring ( 3 ) and with at least one seal, wherein between the cap ( 2 ) and the guide ring ( 3 ) a plain bearing ( 4 ), characterized in that the sliding bearing ( 4 ) a first sliding element ( 5 ) and a second sliding element ( 6 ) having. Strut bearing according to claim 1, wherein the first sliding element ( 5 ) positively or non-positively with the cap ( 2 ) and wherein the second sliding element ( 6 ) positively or non-positively with the guide ring ( 3 ) connected is. Strut bearing according to claim 1, wherein the first sliding element ( 5 ) on the cap ( 2 ) and wherein the second sliding element ( 6 ) on the guide ring ( 3 ) is sprayed. Strut bearing according to one of the preceding claims, wherein the cap ( 2 ) and / or the guide ring ( 3 ) is formed of a glass fiber reinforced plastic. Strut bearing according to one of claims 1 to 3, wherein the cap ( 2 ) and / or the guide ring ( 3 ) is formed of a non-reinforced material. Strut bearing according to one of the preceding claims, wherein the sliding bearing ( 4 ) is formed of an unreinforced plastic. Strut bearing according to one of the preceding claims, wherein the seal as a labyrinth seal ( 7 ) is trained. Strut bearing according to claim 7, wherein the sliding bearing ( 4 ) a part of the labyrinth seal ( 7 ) trains. Strut bearing according to one of the preceding claims, wherein the sliding bearing ( 4 ) has at least one recess on its sliding surface. Strut bearing according to one of the preceding claims, wherein the guide ring ( 3 ) has a reinforcement.

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