Spring support and methods for its manufacture

Abstract

Spring support (1), for arrangement between a helical compression spring (3) of a vehicle chassis and a spring plate (2) supporting the helical compression spring (3), which, being made of elastomeric material, is placed at least along a partial region of an end coil (4) of the helical compression spring (3), around and above or around and below it, wherein the spring support (1) consists of chemically curing adhesive, characterized in that a spring wire (6) of at least the end coil (4) of the helical compression spring (3), at least over a partial region of its length, is completely surrounded in the circumferential direction by the adhesive of the spring support (1).

Description

[0001] The invention relates to a spring support between a spring plate and a helical compression spring of a wheel suspension of a motor vehicle according to the preamble of patent claim 1 and a method for producing such.

[0002] Known spring supports between the helical compression spring and the spring plate consist of an elastomeric material. In this case, the spring support can be provided with a pin for fixing it on the spring plate and for adjustment when it is mounted on the spring plate. At one end of the last turn of the helical compression spring, the spring support is designed in some applications in such a way that it partially wraps around the helical compression spring and the helical compression spring can thus be optimally fitted during assembly. This is shown, for example, in DE 10 2012 213 905 A1 for a vehicle helical compression spring as a suspension spring for cushioning and vibration damping of the vehicle body. According to this invention, a spring plate for a helical compression spring of a wheel suspension of a motor vehicle, with a spring seat that is adapted in a form-fitting manner over at least a partial area of ​​the end of the helical compression spring, is characterized in that the spring plate is made up of several parts and at least one elastomeric spring pad, each of which is at least partially enclosing, the gradient of the end of the helical compression spring compensating for the lower and upper molded bodies, which are gripped in a fork-like manner by brackets of a spring plate housing that can be fastened to one another and are held braced against one another.

[0003] The helical compression springs are generally made of wire, which usually encloses a hydraulic vibration damper with a constant pitch in the suspension-effective area. It is important that the spring ends of the helical compression spring can be properly supported. A spring plate constructed in this way has the advantage that it can be fixed and mounted on the spring in a simple manner. In particular, if it is designed with a central opening, it is easily possible for this to fix the helical compression spring to a spring mount on the body or wheel.

[0004] For cost reasons, the spring ends of the majority of mass-produced springs are designed without mechanical processing and are positioned according to the pitch of the spring plate. The disadvantage of the somewhat greater overall height and the additional expense for the final pitch to be incorporated into both spring plates and the generally necessary torsional compensation of a spring plate to adapt to the manufacturing variance in the number of coils of a spring type are accepted.

[0005] DE 10 2009 052 030 A1 shows a spring pad that consists of a base body and a surface facing the helical compression spring. The surface is provided with an elastic layer which has a thickness profile adapted to the gradient of the helical compression spring, so that when the spring pad is installed, a free space between it and the helical compression spring is filled by the elastic layer. When the suspension spring is fully deflected, the spring pad may detach locally from the helical compression spring for a short time. This, in turn, allows dirt and dirt to get into the gap, which then leads to corrosion of the helical compression spring. The resulting notch effect in the last turn of the helical compression spring could eventually contribute to damage to the suspension spring.

[0006] DE 10 2005 050 023 A1 describes a method for mounting a helical spring on a spring plate which has an axial support surface for an end turn of the helical spring. The helical spring is supported on at least one radial guide surface. In this case, the guide surface is formed by a shape-changeable material whose shape can be fixed.

[0007] The object of the invention is to provide a spring support which, on the one hand, enables a high level of driving comfort and, on the other hand, with which the spring and spring support can be easily assembled, for reduced assembly and production costs.

[0008] The object is solved by the features of patent claim 1. Advantageous embodiments are described in the dependent claims. Claims 7 and 8 describe a method for producing the spring support.

[0009] According to the invention, a spring support for arrangement between a helical compression spring of a vehicle chassis and a spring plate supporting the helical compression spring, which, consisting of elastomeric material, is placed at least along a partial region of an end turn of the helical compression spring, around and above or around and below this, is characterized that the spring pad consists of chemically hardening adhesive.

[0010] Such a connection of the helical spring promotes a planar and modular connection. As a result, on the one hand high point loads can be avoided and on the other hand a higher spare part purpose can be achieved. An adjustability of rigidity in all three spatial directions is also possible. The adhesive layer allows a higher damping effect to be achieved, which significantly increases driving comfort. Furthermore, the loose mounting of the spring on the spring pad is avoided. This prevents the helical compression spring from detaching from the spring pad and this from the spring plate for a short time, and there is no gap that would allow dirt to penetrate between the helical compression spring and the spring pad, which also prevents corrosion and reduces costs associated with spare parts. In addition, the material, assembly and production costs are reduced and, as a result, the material, assembly and production costs are reduced.

[0011] Preferred embodiments of the invention are characterized in that the spring support at least partially encloses the end turn of the helical compression spring in a form-fitting manner, which advantageously elastically connects the end turn of the helical compression spring to the spring plate in a non-detachable manner, in particular when a spring wire at least the end turn of the helical compression spring, at least over a portion of its length, completely surrounded in the circumferential direction by the adhesive of the spring pad. If the spring pad then consists of cold-curing adhesive, this connection is characterized by ease of use and workability. Furthermore, no energy is required for curing. The spring seat is advantageously accommodated by a concave spring plate which is supported on a body or on a component of a wheel suspension, in particular on a wheel control arm or a vibration damper.

[0012] A preferred method for producing such a spring support is characterized in that a concave spring plate is at least partially filled with chemically hardening adhesive and then at least the end turn of the helical compression spring is at least partially introduced into the not yet hardened adhesive. It is particularly advantageous if the end turn of the helical compression spring is introduced into the adhesive in such a way that a spring wire of at least the end turn is completely surrounded by the adhesive in the circumferential direction, at least over a portion of its length.

[0013] The invention is further explained in a schematic representation using two partial sections of spring supports attached to a body. Show it:

[0014] figure 1: A partial section of an upper spring seat, in the direction of a spring longitudinal axis, according to the invention and

[0015] figure 2: a partial section of a further embodiment of an upper spring seat, in the direction of a spring longitudinal axis, according to the invention.

[0016] A wheel guide element of a wheel of a multi-track motor vehicle is not shown in the figures, since the design of a spring strut or spring-damper strut in these areas is as usual in the known prior art. The present invention is concerned with a spring pad 1 on a spring plate 2 for a partially drawn helical compression spring 3 as components of a wheel suspension of a motor vehicle. According to the invention, at each end of the helical compression spring 3 of a spring strut the spring plate 2 the helical compression spring 3support so that the spring pad 1 between spring plate 2 and helical compression spring 3 when rebounding both in contact with the spring plate 2 as well as with the helical compression spring 3 remains connected and therefore no dirt or other particles between the helical compression spring 3 and spring pad 1 or between spring supports 1 and spring plate 2 can penetrate.

[0017] The spring pad 1 consists of elastomeric material, a chemically hardening adhesive, and is in the figure 1 and figure 2 drawn end of the helical compression spring 3 around and over a terminal whorl 4 the helical compression spring 3 placed. The spring pad 1 consists of cold-curing adhesive and encapsulates the end turn 4 the helical compression spring 3 form-fitting, whereby the spring plate 2 and the helical compression spring 3 elastically movable and vibration-damping are glued together.

[0018] The spring plate 2 is in the direction of the spring pad 1 concave, to accommodate this and the end whorl 4 , trained and supported on a body 7 from which it is attached, for example, by means of a screw or welded connection. Indicated by dash-dotted lines 5 . The Spring Wire 6 the end turn 4 the helical compression spring 3 is, at least over a portion of its length, circumferentially completely exposed to the adhesive of the spring overlay 1 surround that between the spring wire 6 and the spring pad 1 there is a positive connection.

[0019] During assembly, the concave spring plate 2 at least partially filled with chemically curing adhesive, the spring pad 1 forms, and then in the not yet hardened adhesive of the spring pad 1 at least the end turn 4 the helical compression spring 3 at least partially introduced. This is advantageously done in such a way that a spring wire 6 at least the end whorl 4 , is completely surrounded by the adhesive in the circumferential direction, at least over a portion of its length. The entire end turn is preferred 4 embedded in the adhesive. When gluing the end turn 4 the helical compression spring 3 into the spring plate 2 the adhesive that has not yet hardened must not be subjected to the compressive force, as otherwise there would not be a sufficiently thick, all-round, hardened elastomeric layer serving as acoustic insulation around the spring wire 6 the end turn 4 can train.

[0020] As a material for the spring pad 1 a chemically curing two-component adhesive, in particular a cold-curing 2-component adhesive, is preferably provided. Adhesives such as Körapop 225-2K, Teroson PU860ME, Li-Klebstoff 2816L or SikaForce 7550 can be used. Other adhesives are also conceivable. The spring plate 2 can consist of an iron material, steel, plastic or other materials and is preferably screwed directly to the body with a non-positive fit. Furthermore, a non-illustrated damper element can be provided, which is supported by the helical compression spring 3 is inscribed. So can the spring plate 2 one end of the helical compression spring 3 support a spring strut and the wheel suspension can also consist of at least one telescopic vibration damper, the end of which is a piston rod, particularly in the design of the spring plate 2 according to figure 2, or whose damper housing is provided with a device for attachment to a vehicle body or to the wheel suspension. Thus, in a simple manner with a conventional wheel suspension, the spring support according to the invention 1 be used. QUOTES INCLUDED IN DESCRIPTION

[0021] This list of documents cited by the applicant was 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. Patent Literature Cited

[0022] DE 102012213905 A1

[0002] DE 102009052030 A1

[0005] DE 102005050023 A1

[0006]

Claims

[1] Spring support ( 1 ), for the arrangement between a helical compression spring ( 3 ) of a vehicle chassis and a coil spring ( 3 ) supporting spring plate ( 2 ), which, consisting of elastomeric material, at least along a partial area of ​​an end coil ( 4 ) the helical compression spring ( 3 ), around and above or around and below this, characterized by that the spring support ( 1 ) consists of chemically hardening adhesive. [2] Spring support ( 1 ) according to claim 1, characterized by that these are the final turn ( 4 ) the helical compression spring ( 3 ) at least partially enclosed in a form-fitting manner. [3] Spring support ( 1 ) according to claim 1 or 2, characterized by that it consists of cold-curing adhesive. [4] Spring support ( 1 ) according to one of claims 1 to 3, characterized by that these are formed by a concave spring plate (2 ) is recorded, which is attached to a car body ( 7 ) or is supported by a component of a wheel suspension. [5] Spring support ( 1 ) according to claim 4, characterized by that the component of the wheel suspension is a wheel guide arm or a vibration damper. [6] Spring support ( 1 ) according to any one of claims 1 to 5, characterized by that a spring wire ( 6 ) at least the final turn ( 4 ) the helical compression spring ( 3 ), at least over a portion of its length, completely free of the adhesive of the spring support in the circumferential direction ( 1 ) is surrounded. [7] Method for manufacturing a spring support ( 1 ) according to any one of claims 1 to 6, characterized by that a concave spring plate ( 2 ) is at least partially filled with chemically hardening adhesive and then at least the end thread is inserted into the still unhardened adhesive ( 4) the helical compression spring ( 3 ) is at least partially contributed. [8] Method according to claim 7, characterized by that the end coil of the helical compression spring ( 3 ) is introduced into the adhesive in such a way that a spring wire ( 6 ) at least the final turn ( 4 ), at least over a portion of its length, is completely surrounded by adhesive in the circumferential direction.

Images