DE102016223549A1 - Suspension strut - Google Patents

Abstract

The invention relates to a strut support bearing for supporting a chassis of a motor vehicle against a body of the motor vehicle, with a body associated head part (1, 2) and a spring part, wherein the head part (1, 2) of the body associated upper part (1) and a having the spring part associated lower part (2), and upper part (1) and lower part (2) with a rotary bearing (10) rotatably arranged to each other, wherein the pivot bearing (10) as a sliding bearing (10) with at least one slide insert (4) and at least a sliding surface (7, 8) is executed, wherein at least the upper part (1) or the lower part (2) has a sliding surface (7, 8) of the sliding bearing. The suspension strut support bearing should be improved so that the pivot bearing (10) has a consistently uniform torque at the highest possible loads, while saving space, can be installed without additional installation effort and allows separation of the functions "suspension" and "storage". This object is achieved in that the lower part (2) is formed in two parts, wherein a first lower part section (12) is assigned to the spring part (13) and a second lower part section (14) of the sliding insert (4).

Description

The invention relates to a strut support bearing for supporting a chassis of a motor vehicle against a body of the motor vehicle, with a body associated with the head part and a spring part, wherein the head part of the body associated upper part and the spring part associated lower part, and upper part and lower part with a pivot bearing are rotatable to each other, wherein the pivot bearing is designed as a sliding bearing with at least one slide insert and at least one sliding surface, wherein at least the upper part or the lower part has a sliding surface of the sliding bearing.

Suspension struts, which consist of the combination of a suspension spring and a shock absorber, are used in particular to support steerable wheels, for example of a motor vehicle, against a body. The suspension spring is usually designed as a helical spring. The support of the coil spring should be rotatably mounted against the body, so that the steering must apply only the lowest possible torques. The rotational movement of the shock absorber is sufficiently given by the rotatability of the piston rod in the damper housing.

If in particular the use of a power steering is provided, it must be ensured that the friction torque of the pivot bearing between the body and coil spring over the life of the bearing remains as constant as possible to avoid high control effort.

In the EP 1559595 B1 Such a bearing is disclosed in which the pivot bearing is designed as a ball bearing. However, this type of storage has certain limitations on usability. Thus, the use of thermoplastics for the parts of the damper block, the accommodation of bearing shells for the ball bearing is necessary, which makes in this teaching recesses in the plastic parts required.

Since thermoplastic creep under load, there is a risk here that the relatively thin bearing shells of the ball bearing follow these deformations, which has an increase in the torque required for rotation in the ball bearing result. In addition, ball bearings are relatively sensitive to external influences, such as penetrating water, dirt, etc., which requires relatively expensive sealing systems.

In addition, the carrying capacity of said ball bearings is limited.

In the DE 10 2010 036242 A1 is a Federbeingleitlager disclosed which is intended for use in strut support bearings. However, such a slide bearing is a separate component, which further exacerbates the already scarce space conditions in the suspension strut bearing anyway. In addition, this results in a higher installation cost.

In the patent application DE 10 2015 223 958.6 a generic strut is disclosed in which the pivot bearing is designed as a sliding bearing with at least one slide insert and at least one sliding surface, wherein at least the upper part or the lower part has a sliding surface of the sliding bearing.

Here, however, the lower part is designed only as an overall component, which does not allow separation of the functions "suspension" and "storage". Therefore, an individually designed lower part must be available for each combination of coil spring and plain bearing design, which possibly increases the manufacturing cost.

The invention has for its object to improve a strut support bearing of the kind so that the pivot bearing at the highest possible load has a permanently uniform torque while saving space, can be installed without additional installation effort and a separation of the functions "suspension" and "storage "Allows ..

This object is achieved in that the lower part is formed in two parts, wherein a first lower part portion is associated with the spring part and a second lower part portion of the sliding insert.

In a further development of the invention, the second lower part section is formed as a sheet metal part.

This arrangement has the advantage that the lower part on the one hand comprises a standardizable section, can be absorbed by the standard coil springs and requires no further processing as a sliding surface. To accommodate the slide insert is a sheet metal part use, which in the production of a suitable surface as a sliding surface can be imposed.

The angling of the plain bearing ensures not only the axial but also a good radial force transmission of the pivot bearing. An additional radial guidance of the upper and lower part are not necessary.

With reference to the drawing, an example of the invention will be explained in more detail below.

The 1 shows a section of a headboard of a strut support bearing according to the invention. The headboard has a top 1 and a lower part 2 on. The top 1 is through holes 3 , of which only one is shown here, connectable to a motor vehicle body, not shown.

Between shell 2 and lower part 3 is a sliding element 4 arranged. The sliding element 4 has two sections 5 and 6 on, with the sections 5 and 6 have an angle of nearly 90 ° to each other.

The top 1 has a sliding surface 7 on, corresponding to the shape of the slider 4 is formed and with the sliding element 4 in contact. The lower part 2 has a sliding surface 8th on, corresponding to the shape of the slider 4 is formed and with the sliding element 4 in contact.

The sliding surfaces 7 and 8th form together with the sliding element 4 a plain bearing 10 so the top part 1 against the lower part 2 is rotatably mounted. By the shaping of sliding surfaces 7 and 8th and the sliding element 4 is the shell 1 against the lower part 2 guided both axially and radially.

Because of that top part 1 and lower part 2 the sliding surfaces 7 and 8th of the plain bearing 10 integral, is the height of the plain bearing 10 minimized. The relatively large bearing surfaces 7 and 8th ensure a low surface pressure, so the risk of a possible deformation of the verdict 1 or the lower part 2 is also minimized. The sliding element 4 Alternatively, as a coating directly on the verdict 1 or at the bottom 2 mountable. This would greatly simplify the assembly of the head part.

The lower part 2 is constructed in two parts. A first lower section 12 is a coil spring 13 assigned and receives this supporting, a second lower portion 14 is the sliding bearing 10 assigned and records this. The second lower portion 14 is formed as a sheet metal part and includes the sliding surface 8th involved in the production of the sheet metal part 14 already imprintable.

This results in the advantage that the coil spring 13 receiving first base section 12 No specially processed surfaces needed. The sheet metal part 14 is relatively inexpensive and easy to produce by the stampable sliding surface.

At the outward end 15 of the sheet metal part 14 has the sheet metal part 14 a double bend 15 on, in a corresponding recess 16 of the upper part 1 contactlessly engages. One in the recess 16 Pressed angled seal 17 forms together with the double angulation 15 of the sheet metal part 14 and the recess 16 a non-contact labyrinth seal that protects the slide bearing against environmental influences.

LIST OF REFERENCE NUMBERS

1

top

2

lower part

3

Holes in the upper part 1

4

Sliding element, lubricant

5, 6

Portions of the sliding element 4

7, 8

sliding surfaces

9

End of section 5

10

Swivel bearing, plain bearing

11

Groove in the lower part 2

12

first lower part section of the lower part 2

13

coil spring

14

second lower section of the lower part 2 , Sheet metal part

15

outwardly facing end of the sheet metal part 14th

16

Recess of the upper part 1

17

poetry

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

• EP 1559595 B1 [0004]
• DE 102010036242 A1 [0007]
• DE 102015223958 [0008]

Claims (2)

Strut support bearing for supporting a chassis of a motor vehicle against a body of the motor vehicle, with a body associated head part (1, 2) and a spring part, wherein the head part (1, 2) of the body associated upper part (1) and the spring part associated lower part (2), and upper part (1) and lower part (2) with a rotary bearing (10) are arranged rotatably to each other, wherein the pivot bearing (10) as a sliding bearing (10) with at least one slide insert (4) and at least one sliding surface (7 , 8) is executed, wherein at least the upper part (1) or the lower part (2) has a sliding surface (7, 8) of the sliding bearing, characterized in that the lower part (2) is formed in two parts, wherein a first lower part section (12) the spring part (13) and a second lower part section (14) of the sliding insert (4) is associated. Federbstützstützlager after Claim 1 , characterized in that the second lower part portion (14) is formed as a sheet-metal shaped part (14).

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