DE102004022415A1 - Curved track bracket for actuator of roll stabilizer used in motor vehicle, has function surface made of material harder than material of curved track - Google Patents

Abstract

The bracket is formed in hollow cylindrical shape with two or more support rollers (21) provided on its lateral surface (23). The support rollers are arranged across screw rods connected to a control drive, and are connected to the screw rod using a coupling. The bracket has a function surface (25) made of a material harder than the material of a curved track. Independent claims are also included for the following: (A) Curved track; and (B) Curved track bracket production method.

Description

Territory of invention

The The invention relates to a curved track carrier for an actuator of a roll stabilizer on a motor vehicle, the hollow cylinder and with two or more on the Circumference of the lateral surface same evenly distributed and incorporated into the lateral surface Curved tracks is formed, in each of which a support roller one over a threaded spindle with an actuator operatively connected coupling element guided The invention further relates to a process for the preparation such a curved path carrier.

background the invention

roll stabilizers On motor vehicles are used to prevent or reduce, for example while a cornering rolling movements of the motor vehicle used and can be arranged both in the front and in the rear axle.

The DE 100 02 455 A1 describes such a roll stabilizer, which is formed by an actuator and disposed between two stabilizer halves, which are each in operative connection with a suspension of a common vehicle axle. The actuator consists essentially of two hollow cylindrical and coaxial with each other arranged curved path carriers, which in turn each have two or more uniformly distributed over the circumference of the lateral surface thereof and incorporated into the lateral surface of the same trained curved paths.

The Curved path carrier are also rotatably connected in each case with a stabilizer half and by means of an electrically operated actuator to their common longitudinal axis against each other rotatable or braced by in the curved paths each a supporting role one over a threaded spindle with the actuator operatively connected coupling element longitudinally slidably guided is.

By This measure can on the as a result of a rolling motion of the vehicle body against the Actuator twisting stabilizer halves applied counter moments be, as a result, advantageously reduces a rolling motion or suppressed can be.

It It goes without saying that the curved paths of both curved track carriers themselves should differ in their axial course from each other to a such twistability at all to accomplish. For example, you can the curved paths of a curved path carrier inclined to the longitudinal axis and the curved paths the other curved track carrier axially parallel to the longitudinal axis be educated.

Of Further, this document proposes that the two Curved track carrier coaxial intertwined and are stored, wherein a common coupling element use can find, or are arranged axially behind one another, wherein every curved track carrier a separate coupling element is assigned.

to Avoidance of friction losses and accordingly to achieve the highest possible efficiency as well as to increase the service life has proved necessary, such Cam track gear, consisting essentially of the curved path carriers and the support rollers guided in them, wälzhart form, where it is at the support rollers to known parts purchased act, which are executed in turn crowned.

What the curved track carrier As far as concerns are concerned, these predominantly exist each of a steel tube, in the lateral surface by machining the curved tracks are incorporated. Following this, the Blank of each curved track carrier by heat treatment hardened.

by virtue of the carried out heat treatment the entire curved track carrier However, in practice, changes in shape and dimensions, in particular the Curved tracks of the same register, which in turn is a costly Require reworking. Here is the below described Invention.

Task of invention

Of the Invention is based on the object, a curved path carrier for a To provide actuator of a roll stabilizer on a motor vehicle, the warranty a hard-hitting one Curved track gear is easy and inexpensive to produce. Further should be reworked for compliance be avoided as far as possible. In addition, a suitable method be presented for the preparation of such a curved path carrier.

Summary the invention

The invention is based on the finding that essentially satisfies the task posed by a separate training or material treatment of the functional surfaces of the curved paths the denstellenden solution can be supplied.

Therefore The invention relates to a curved path carrier for an actuator of a roll stabilizer on a motor vehicle, the hollow cylindrical and with two or more about the circumference of the lateral surface the same distributed and incorporated into the lateral surface curved paths is formed, in each of which a support roller one via a threaded spindle is guided with an actuator operatively connected coupling element.

to solution the task is also provided that the curved paths functional surfaces exhibit, the harder are formed as the adjoining material of the Kurvenbahnträgers.

By This measure is beneficial for that to be realized cam gear required particularly hardened area of the curved path carrier on the functional surfaces the curved paths limited. A conventional heat treatment to be performed the entire curved track carrier, with the ones already mentioned above and unavoidable disadvantages can be omitted, which Savings especially in energy and working hours result.

In Development of the invention, the hardness of the functional surfaces at least the rolling hardness of itself each on top of it supporting role correspond.

Farther is provided that the curved path carrier alternatively to each other a steel tube, a Rundknetbauteil, a molded into a sleeve and fixed sheet steel, a light metal diecast carrier tube or a plastic carrier tube is formed, thereby demanding simplicity and easier Manufacturability is particularly taken into account.

According to one Another embodiment of the invention is the functional surface of each Curved track preferred by at least one separately manufactured and on formed the inner contour of the cam track applied support plate.

The Support plate can cost so far from a correspondingly hardened Sheet metal strip wound or made of a hardened ring element be.

Further It is suggested that the support plate directly to the inner contour the curved path and / or adjoining lateral surface areas of the curved path carrier by welding or gluing is attached.

A Another advantageous embodiment of the invention provides that the support plate directly to the inner contour of the curved path and / or attached to it Shell surface areas of the curved track carrier over one Intermediate layer of a material with a lower modulus of elasticity tethered as steel.

These Intermediate layer can in this case by an elastomeric plastic, a rubber-elastic material or a thick applied elastic adhesive be formed, wherein the intermediate layer of the elastomeric plastic or the rubber with the support plate and the curved path through Bonding connected or after an injection molding process to the support plate and the curved track carrier is formed.

By said elastic intermediate layer can advantageously any manufacturing inaccuracies or unavoidable manufacturing tolerances unproblematic be compensated.

According to one another preferred embodiment The invention finally becomes proposed that a through a steel tube, a Rundknetbauteil or through to a sleeve formed and fixed sheet steel formed curved track carrier curved tracks with one by surface hardening, like flame hardening, induction or laser surface hardening functional surface having.

Also by this measure may be advantageous in terms of heat treatment in view of the prior art the entire curved track carrier be waived. The heat input in the blank of the curved track carrier is due to the surface treatment the same exclusively in the region of the inner contour of the curved paths so low that as a result of conventional heat treatment anticipated changes in shape and dimensions not listed here.

The method for producing a curved path carrier for an actuator of a roll stabilizer on a motor vehicle, which in turn is a hollow cylinder and with two or more over the circumference of the lateral surface of the same and incorporated into the lateral surface trained cam tracks, in each of which a support roller via a threaded spindle with an actuator operatively connected coupling element is guided, is formed, is characterized according to the independent method claim 10, characterized in that first in one or more steps a blank of the curved path carrier with incorporated curved paths in the form of a steel tube, a Rundknetbauteils, molded into a sleeve and fixed steel sheet, a light metal pressure casting support tube or a plastic carrier tube is produced, and that in a subsequent method step, the curved paths are provided with functional surfaces which are harder than the adjoining material of the curved path carrier.

preferred Further developments or refinements of the method according to the invention are defined by the subordinate subclaims 11 to 16.

Short description the drawings

The The invention will be described below with reference to the accompanying drawings on some embodiments explained in more detail. In this shows:

1 Example, the construction of a motor vehicle rear axle with a roll stabilizer whose actuator is arranged between two stabilizer halves and operatively connected to the same,

2 the actuator after 1 (partially broken),

3 the actuator after 1 and 2 in longitudinal section,

4 a coupling element of the actuator in an item view, and

5 to 7 the very schematic representation of an inventively designed curved path carrier of the actuator according to 1 to 4 in three possible embodiments.

detailed Description of the drawings

In 1 is shown a motor vehicle rear axle, in which the wheels 1 . 2 on trailing arms 3 . 4 are guided. Each trailing arm 3 . 4 is in this case a shock absorber 5 . 6 assigned, which in turn is operatively connected in a conventional manner with the vehicle body or the vehicle body, not shown. Furthermore, one is the trailing arm 3 . 4 connecting guide tube 7 via support arms 8th . 9 connected to the vehicle body.

The motor vehicle rear axle described above is also associated with a so-called roll stabilizer, which in turn consists of stabilizer halves 10 . 11 between which an actuator 12 is arranged. The stabilizer halves 10 . 11 grip with their outer ends to the respective associated trailing arm 3 . 4 at. With their respective inner ends are stabilizer halves 10 . 11 with one of two coaxially arranged and hollow cylindrical so-called curved path carriers 13 . 14 of the actuator 12 rotatably connected.

As in 2 and 3 shown in more detail here is an inner curved track carrier 13 coaxially within an outer curved track carrier 14 rotatably mounted.

Further, the inner curved track carrier 13 with the stabilizer half 10 and the outer curved track carrier 14 via a cylindrical housing 15 with the stabilizer half 11 rotatably connected.

In the case 15 is a presently electrically operated actuator 16 firmly arranged, its rotor 17 with a threaded spindle 18 rotatably connected, in turn, axially in the form of a hollow cylinder inner curved path 13 extends.

On the threaded spindle 18 is a coupling element 19 arranged longitudinally displaceable in the form of a threaded nut, which in turn four evenly distributed over the circumference of the same and radially outwardly facing pin 20 for receiving in each case an inner and an outer support roller 21 . 22 having ( 3 and 4 ).

The inner support roller 21 each pin 20 is in a in the lateral surface of the inner curved path carrier 13 incorporated curved track 23 guided, the outer support roller 22 in a curved path 24 the outer curved track carrier 14 ,

The operation of the roll stabilizer or of the actuator 12 has already been extensively explained in the introduction, but it should additionally be noted that said support rollers 21 . 22 with the curved track carriers 13 . 14 are executed as essential components of the curved gear train formed rolling resistant.

In fulfillment of the task, the curved paths 23 . 24 now functional areas 25 on, which are formed according to the invention harder than the adjoining material of the curved path carrier 13 . 14 ,

According to the method, it is therefore indicated, according to a preferred manufacturing method, first in one or more method steps, a blank of a curved path carrier 13 . 14 with incorporated curved tracks 23 . 24 manufacture.

As a blank z. B. a suitable steel tube, a prepared by a known rotary swaging tubular tubular swaging or a molded into a sleeve and in Be rich of the abutting edges fixed, for example, clinched or cohesively joined steel sheet find use.

In the lateral surface of the above blank can with simple and known measures, for example by a machining process, the curved paths 23 respectively. 24 be incorporated. Furthermore, non-cutting forming methods such as punching, punching to achieve recesses on the jacket or the output board are suitable.

It is also conceivable and is covered by the invention with that for the production of the curved path carrier 13 . 14 z. B. prefabricated light metal die-cast support tubes, such as support tubes made of an aluminum / magnesium alloy, or to use plastic carrier tubes.

In a subsequent method step then the curved paths 23 . 24 the curved track carrier 13 . 14 with the said harder functional surfaces 25 as the adjoining material of the Kurvenbahnträgers 13 . 14 provided, the hardness of the functional surfaces 25 expediently at least the rolling hardness of each rolling on it rolling support role 21 . 22 should correspond.

In 5 is an extremely schematic example of an inventively designed inner curved path carrier 13 in the form of a steel tube with four evenly distributed over the circumference and in the lateral surface of the same incorporated curved paths 23 shown in cross section. Of course, this curved track carrier can also be an outer curved track carrier as well 14 be.

As can be seen, the functional surface 25 every curved path 23 by a separately manufactured component, namely by a support plate 26 formed on the inner contour of the curved path 23 is applied and on which the hard-formed support roller 21 rolls.

The support plate 26 For example, it can be wound from a suitably hardened metal strip or made from a hardened ring element, as well as directly on the inner contour of the curved path 23 be secured by welding, for example spot welding, or by gluing (not shown in detail).

As a result, to achieve a roller-hardened functional surface 25 the curved path 23 advantageous to a conventional heat treatment of the entire curved path carrier 13 be waived.

According to 5 is the support plate 26 over an intermediate layer 27 from a material with a lower modulus of elasticity than steel or the modulus of elasticity of the curved path carrier 13 to the inner contour of the curved path 23 tethered.

This intermediate layer 27 can be formed by an elastomeric plastic, by rubber or by a thick applied elastic adhesive, which advantageously any manufacturing inaccuracies or unavoidable manufacturing tolerances can be easily compensated.

The intermediate layers 27 made of an elastomeric plastic or rubber can with the support plate 26 and the curved track carrier 13 also be connected by gluing.

5 however, shows an intermediate layer 27 made of an elastomeric plastic or rubber, which in turn to the support plate 26 and the curved track carrier 13 is molded according to a known injection molding and both over the inner contour of the curved path 25 as well as adjoining lateral surface areas of the curved path carrier 13 extends, whereby a particularly resilient composite is achieved.

It is also particularly advantageous to emphasize that here substantially thinner wall thicknesses of the curved path carrier 13 in comparison to the tempered functional area 25 can be used, which with lower material costs and a lower weight of the curved path carrier 13 accompanied.

Out 6 is an inner curved track 13 in the form of a light metal die-cast support tube, such as a support tube made of an aluminum / magnesium alloy, refer, which in turn is very simple and inexpensive to produce.

The hardened functional surfaces 25 the curved paths 23 are also here by a prefabricated hardened support plate 26 formed, which on the above-explained in more detail intermediate layer 27 from an elastomeric plastic or rubber to the curved track carrier 13 is formed.

The embodiment according to 7 finally shows an inner curved track 13 , which in turn is formed from a Rundknetbauteil.

Rundknetbauteile are components that are produced by the known per se forming method of "rotary kneading", wherein by means of a special tool in the form of a certain number of radially acting on the workpiece kneading tools and optionally one in the bore kneading tools and optionally an engaging in the bore of the workpiece mandrel an intermediate product in the form of a tubular or asymmetrical hollow body with, for example, different wall thicknesses can be produced.

Of the The advantage of such rotary swaging components is, in particular, that these also at different wall thicknesses on an undisturbed fiber flow feature and negative quality phenomena, such as cracks in the wall, poor dimensional stability and poor surface quality, which when using welded Pipes can occur hardly to be recorded. As alternative suitable materials or Materials can be a tempered steel or a case steel can be used.

Certainly it can also be displayed here, the functional area 25 every curved path 23 by a separately manufactured component, namely by a support plate 26 form (not shown in detail).

However, such a rotary swaging component lends itself particularly to the functional surfaces 25 the curved paths 23 to produce by surface hardening, such as flame hardening, induction hardening or laser surface hardening, so that here also advantageous to a conventional heat treatment of the entire curved path carrier 13 can be waived.

It is also possible within the scope of the invention, also steel tubes or molded into a sleeve and fixed steel sheets by said surface hardening with hardened functional surfaces 25 provided that sufficient rolling surface for the support rollers 21 is provided by an appropriate choice of wall thickness.

1

wheel

2

wheel

3

Trailing arm

4

Trailing arm

5

shock absorber

6

shock absorber

7

guide tube

8th

Beam

9

Beam

10

stabilizer half

11

stabilizer half

12

actuator

13

Curved path carrier

14

Curved path carrier

15

casing

16

Stall drive

17

rotor

18

screw

19

coupling element

20

spigot

21

supporting role

22

supporting role

23

cam track

24

cam track

25

functional surfaces

26

Support plate

27

interlayer

Claims (16)

Curved track carrier ( 13 . 14 ) for an actuator ( 12 ) of a roll stabilizer on a motor vehicle, the hollow cylindrical and with two or more over the circumference of the lateral surface of the same distributed and incorporated into the lateral surface cam tracks ( 23 . 24 ) is formed, in each of which a support roller ( 21 . 22 ) one via a threaded spindle ( 18 ) with an actuator ( 16 ) operatively connected coupling element ( 19 ), characterized in that the curved paths ( 23 . 24 ) Functional surfaces ( 25 ), which are formed harder than the adjoining material of the curved path carrier ( 13 . 14 ). Curved track carrier according to claim 1, characterized in that the hardness of the functional surfaces ( 25 ) At least the rolling hardness of each rolling on it roll ( 21 . 22 ) corresponds. Curved track carrier according to claims 1 and 2, characterized in that the curved path carrier ( 13 . 14 ) is formed by a steel tube, a Rundknetbauteil, molded into a sleeve and fixed steel sheet, a light metal die-cast support tube or a plastic support tube. Curved track carrier according to claims 1 to 3, characterized in that the functional surface ( 25 ) each curved track ( 23 . 24 ) by at least one separately manufactured and on the inner contour of the curved path ( 23 . 24 ) applied support plate ( 26 ) is formed. Curved track carrier according to claim 4, characterized in that the support plate ( 26 ) directly on the inner contour of the curved path ( 23 . 24 ) and / or adjoining lateral surface areas of the curved path carrier ( 13 . 14 ) is secured by welding or gluing. Curved track carrier according to claim 4, characterized in that the support plate ( 26 ) directly on the inner contour of the curved path ( 23 . 24 ) and / or adjoining lateral surface areas of the curved path carrier ( 13 . 14 ) via an intermediate layer ( 27 ) is connected from a material with a lower modulus of elasticity than steel. Curved track carrier according to claim 6, characterized in that the intermediate layer ( 27 ) is formed by an elastomeric plastic, a rubber or a thick applied elastic adhesive. Curved track carrier according to claim 7, characterized in that the intermediate layer ( 27 ) made of an elastomeric plastic or a rubber with the support plate ( 26 ) and the curved track carrier ( 13 . 14 ) bonded by gluing or after an injection molding process to the support plate ( 26 ) and the curved track carrier ( 13 . 14 ) is formed. Curved track carrier according to one of the preceding claims, characterized in that a through a steel tube, a Rotknetbauteil or by a formed and fixed to a sleeve steel sheet curved track carrier ( 13 . 14 ) Curved tracks ( 23 . 24 ) with surface hardening produced by surface hardening, such as flame hardening, induction hardening or laser surface hardening ( 25 ), wherein as a steel sheet preferably a case hardening steel or a tempering steel is used. Method for producing a curved path carrier ( 13 . 14 ) for an actuator ( 12 ) of a roll stabilizer on a motor vehicle, the hollow cylindrical and with two or more over the circumference of the lateral surface of the same distributed and incorporated into the lateral surface cam tracks ( 23 . 24 ) is formed, in each of which a support roller ( 21 . 22 ) one via a threaded spindle ( 18 ) with an actuator ( 16 ) operatively connected coupling element ( 19 ), characterized in that first in one or more method steps a blank of the curved path carrier ( 13 . 14 ) with incorporated cam tracks ( 23 . 24 ) in the form of a steel tube, a Rundknetbauteils, molded into a sleeve and fixed steel sheet, a light metal die-cast support tube or a plastic support tube is prepared, and that in a subsequent process step, the curved paths ( 23 . 24 ) with functional surfaces ( 25 ) are provided which are harder than the adjoining material of the curved path carrier ( 13 . 14 ). A method according to claim 10, characterized in that the inner contour of each curved path ( 23 . 24 ) at least one, the functional area ( 25 ) forming, separately manufactured support plate ( 26 ) is applied. A method according to claim 11, characterized in that the support plate ( 26 ) directly on the inner contour of the curved path ( 23 . 24 ) and / or adjoining lateral surface areas of the curved path carrier ( 13 . 14 ) is secured by welding or gluing. A method according to claim 11, characterized in that the support plate ( 26 ) directly on the inner contour of the curved path ( 23 . 24 ) and / or adjoining lateral surface areas of the curved path carrier ( 13 . 14 ) via an intermediate layer ( 27 ) is connected from a material with a lower modulus of elasticity than steel. Method according to claim 13, characterized in that as intermediate layer ( 27 ) an elastomeric plastic, a rubber or a thick applied elastic adhesive is used. Method according to claim 14, characterized in that the intermediate layer ( 27 ) made of an elastomeric plastic or a rubber with the support plate ( 26 ) and the curved track carrier ( 13 . 14 ) bonded by gluing or after an injection molding process to the support plate ( 26 ) and the curved track carrier ( 13 . 14 ) is formed. Method according to claim 10, characterized in that on a curved path carrier ( 13 . 14 ) in the form of a steel tube, a Rundknetbauteils or molded into a sleeve and fixed steel sheet of a hardened steel or a tempering steel, the functional surfaces ( 25 ) of the incorporated curved paths ( 23 . 24 ) are produced by surface hardening, such as flame hardening, induction hardening or laser surface hardening.