WO2019101431A1

WO2019101431A1 - Method for producing a steering gear

Info

Publication number: WO2019101431A1
Application number: PCT/EP2018/077910
Authority: WO
Inventors: Jens-Uwe Hafermalz; Ekkehard Kneer; Dennis Fuechsel
Original assignee: Robert Bosch Gmbh
Priority date: 2017-11-23
Filing date: 2018-10-12
Publication date: 2019-05-31
Also published as: DE102017220917A1

Abstract

A method is provided for producing a steering gear for a steering system of a motor vehicle, wherein the steering gear comprises - a housing (1), - a toothed wheel (2), - a pinion (3) meshing with the toothed wheel (2), and - a pinion shaft (4) comprising the pinion (3), - wherein the pinion shaft (4) is mounted on one side of the pinion (3) in a fixed bearing (6) which comprises a rotary bearing in which the pinion shaft (4) is accommodated and which is accommodated in a bearing sleeve (14), and wherein the fixed bearing (6) furthermore comprises a pivoting ring (15) which has an outer ring (18) and an inner ring (16) which are pivotably interconnected by means of one or more torsion bars, wherein the inner ring (16) is connected inside the bearing sleeve (14) or is integrated therein and the outer ring (18) is arranged secured in the housing (1), - wherein the pinion shaft (4) is mounted on the other side of the pinion (3) in a floating bearing (8) which comprises a rotary bearing in which the pinion shaft (4) is accommodated, with radial mobility inside the housing (1) being ensured for the rotary bearing, - and wherein the bearing sleeve (14) and/or an outer bearing ring (11) of the rotary bearing of the fixed bearing (6) is/are connected to an outer bearing ring (11) of the rotary bearing of the floating bearing (8) or to a bearing bushing (30) accommodating the rotary bearing of the floating bearing (8) by means of an at least partially tubular connecting element (28). It is provided here that the connecting element (28) and/or the bearing sleeve (14) and/or the bearing bushing (30) is/are formed by machining and/or by deep-drawing and/or by winding from a metal sheet.

Description

Method for producing a steering gear

The invention relates to a method for producing a steering gear for a steering system of a motor vehicle.

In most motor vehicles, power steering systems are installed, which generate a supportive torque during steering and thereby reduce the steering torque to be applied by the driver to the steering column.

The known power steering systems are based on a steering gear that translates the drive power of a hydraulic or electric steering motor and transmits, for example, the steering column. Such steering gear can be in the form of a Schraubwälzgetriebes and in particular as Schraubradgetriebe or as

Worm gear be formed. These then comprise a gear wheel, which may be directly or indirectly connected to the steering column, as well as an intermeshing, driven by a shaft of the steering motor pinion.

As a problem with such steering gears, gear play has shown that due to component tolerances, different thermal expansion of the

Gear elements and / or forms due to wear. In particular, in a so-called Wechsellenken, i. in a direct successive steering with changing steering direction, such a gear play generates unwanted noise, resulting from the alternate application of opposing flanks of the teeth of the pinion and gear.

It is known to eliminate such a backlash as possible by the fact that the pinion shaft pivotable about an axis perpendicular to the longitudinal axis of the

Pinion shaft and extends at a distance from the toothing engagement of pinion and gear, is stored and is pressed by means of one or more spring elements against the gear. The pivoting of the pinion shaft is thereby regularly in one of the two bearings over which the pinion shaft is mounted end-integrated. This storage is hereinafter referred to as "fixed bearing". The storage in the region of the other end is then carried out with a defined clearance (cf., for example, DE 10 2005 035 020 A1), hereinafter referred to as "floating bearing", in order to obtain the positions indicated by

To allow pivoting movement caused deflection. The fixed bearing may in particular be provided on the drive side, while the floating bearing on the free End of the pinion shaft is arranged. The one or more spring elements for pressing the pinion to the gear can be integrated either in the movable bearing or in the fixed bearing.

Such a steering gear in which the spring force is generated for the springing by means of the fixed bearing, for example, from DE 10 2009 054 655 A1 known. In this steering gear is provided to store a ball bearing, which receives the pinion shaft in the region of the fixed bearing on the outside in a pivot sleeve. The

Swivel sleeve includes a bearing sleeve which receives the ball bearing largely free of play, and an outer ring which is held largely free of play in a receptacle of a housing of the steering gear, wherein the outer ring and the bearing sleeve are connected via two torsion bars, which upon rotation of the outer ring to the bearing sleeve be twisted. After mounting the steering gear are the

Torsionsstege twisted such that the elastic return effect generated thereby causes the springing of the pinion shaft.

In a steering gear according to DE 10 2009 054 655 A1, the restoring moment of the elastically twisted torsion bars is transmitted via the ball bearing on the pinion shaft in order to press it against the gear. As a result, a bearing inside the bearing sleeve, outer bearing ring and the pinion shaft receiving, inner bearing ring of the ball bearing are subjected to a load, which is a tilting of these components about an axis radially with respect to the

Longitudinal axis of the ball bearing is aligned, would cause. This load must be supported by the balls of the ball bearing in conjunction with the bearing rings. This requires, in particular in a design of the ball bearing as a single-row radial ball bearing according to DE 10 2009 054 655 A1, a relatively large dimensioning of the ball bearing, which leads to a relatively large and heavy steering gear in total. However, a relatively large steering gear is difficult or at least adversely integrated into a motor vehicle. Furthermore, a relatively heavy steering gear acts on the fundamentally desired lightweight construction of

Motor vehicles.

A steering gear, in which the spring force is generated for the springing in the area of the movable bearing, however, is known from DE 10 2008 002 769 A1. In this

Steering gear is a pinion shaft rotatably mounted in a sleeve which in turn pivotally in the region of a fixed bearing in a housing of the steering gear is stored. A biasing device acts in the region of a movable bearing the sleeve and thereby presses the pinion shaft against a gear of the steering gear.

The invention has for its object to improve a steering gear, as it is basically known from DE 10 2009 054 655 A1, in terms of size and thus in terms of the space required for its integration into a motor vehicle space or to reduce and produce such a steering gear advantageous ,

This object is achieved by means of a method according to the patent claim 1. Advantageous embodiments of the method according to the invention are

Objects of the further claims and / or will become apparent from the following description of the invention.

According to the invention, a method is provided for producing a steering gear for a steering system of a motor vehicle, which has a housing, a toothed wheel, a pinion meshing with the toothed wheel, in particular a screw pinion, and a (screw) pinion shaft comprising the pinion.

The pinion shaft is mounted on one side of the pinion in a fixed bearing, which includes a pivot bearing in which the pinion shaft is received. For this purpose, the rotary bearing comprises at least one inner bearing ring and an outer bearing ring and optionally, in a preferred embodiment as rolling and in particular ball bearings, a plurality of arranged between the bearing rings rolling elements, in particular balls, wherein the pinion shaft is received within the inner bearing ring of the pivot bearing. The pivot bearing and concretely the outer bearing ring of the pivot bearing of the fixed bearing is further added to a bearing sleeve. In addition, the bearing comprises a pivot ring having an outer ring and an inner ring, which are pivotally connected to each other via one or more torsion bars, wherein the inner ring connected to the bearing sleeve or integral part of this and the outer ring in the housing of the steering gear (with respect to at least one, preferably with respect to all directions, ie

immovable) is arranged fixed.

Furthermore, the pinion shaft of a steering gear according to the invention is mounted on the other side of the pinion in a floating bearing comprising a pivot bearing in which the pinion shaft is received, wherein for the pivot bearing and thus also for the end of the pinion shaft received therein a radial mobility within the Housing is granted. Preferably, it may be provided that the pivot bearing and in particular an outer bearing ring thereof is received in a bearing bush, which is arranged within the housing such that a radial mobility of the pivot bearing within the housing gewähreistet.

Such a floating bearing, for example, an embodiment according to the

DE 10 2005 035 020 A1. In particular, it can be provided that the bearing bush of the movable bearing has a rotary bearing receiving inner bushing and a surrounding the inner bush and fixedly arranged in the housing

External bushing, wherein the outer bushing and the inner bush defining an annular gap and wherein the outer bushing and the inner bushing are connected to each other via a flexible connecting portion, that they are movable in at least one radial direction relative to each other.

Alternatively, the bearing bush can also be designed such that it is connected to a stop element or itself as a stop sleeve, which is arranged displaceably and simultaneously secured against rotation within a receiving space of the housing, wherein a stop between the

Stop element or the stop sleeve and a preferably cylindrical wall of the receiving space guided by the fixed bearing

Pivoting movement of the pinion shaft is limited, wherein the stop element or the stop sleeve on the one hand and the receiving space on the other hand are formed such that only in such a stop, due to the interaction of then contacting contact surfaces of the stop element or the stop sleeve and the wall of the receiving space, in addition a pivoting movement of the Pinion shaft is blocked about a perpendicular to the pivot axis aligned axis.

The pivot bearing of the floating bearing of the steering gear according to the invention comprises at least one inner bearing ring and an outer bearing ring and

optionally, in a preferred embodiment as a rolling and in particular as a ball bearing, arranged between the bearing rings rolling elements, in particular balls, wherein the pinion shaft is received within the inner bearing ring and the outer bearing ring is received in particular directly inside the inner bush of the bearing bush of the floating bearing.

For a steering gear to be produced by means of a method according to the invention, it is further provided that the bearing sleeve and / or an outer Bearing ring of the pivot bearing of the fixed bearing is connected via an at least partially or partially tubular connecting element with an outer bearing ring of the pivot bearing of the movable bearing or a rotary bearing of the movable bearing receiving bearing bush. The connecting element is designed such that this at least one load, which leads to a tilting of the outer ring of the pivot bearing of the fixed bearing, transmits directly or indirectly to the outer ring of the pivot bearing of the movable bearing. It can thereby be achieved that the return torque of the elastically twisted torsion bars of the swivel ring of the fixed bearing is no longer transmitted exclusively via the pivot bearing of the fixed bearing on the pinion shaft to press it against the gear, but resulting from the restoring moment swivel load of the bearing sleeve of the fixed bearing additionally

or primarily via the connecting element on the pivot bearing of the

Loslagers and thus transmitted to the end of the pinion shaft mounted therein. In conjunction with a contact between the pinion and the gear, which is arranged between the fixed bearing and the floating bearing, there is a in the

Return torque of the twisted torsion bars justified load on the pivot bearing, which is oriented substantially radially. A transmission of a tilting moment in relevant height of the pivot bearings and in particular of the pivot bearing of the fixed bearing on the pinion shaft can be avoided. This allows advantageously to dimension the pivot bearing of the fixed bearing and / or the pivot bearing of the floating bearing relatively small, which can have a positive effect in terms of size and weight and in terms of manufacturing costs of a steering gear according to the invention. Furthermore, a structurally relatively simple ausgestaltetes pivot bearing, preferably a single-row radial ball bearings are selected for the fixed bearing and / or the floating bearing, which can also have a positive effect in terms of size and weight and in terms of manufacturing costs of a steering gear according to the invention.

For an advantageous creation of such a steering gear is inventively provided that the connecting element and / or the bearing sleeve and / or the bearing bush, which are each preferably made of metal optionally made of plastic,

by machining, in particular from a semi-finished product (for example a rod or a pipe) and / or

- by deep drawing and / or

- By winding from a sheet is / are being trained.

According to the invention it is provided that the connecting element is at least partially tubular. In particular, it can be provided that the

Connecting element is tubular over its entire length and surrounds the pinion shaft, wherein a (preferably the only) arranged in the region of the pinion shell opening is provided in the tube shell of the connecting element, which extends over part of the circumference and part of the length of the tubular jacket and which allows engagement of the pinion with the gear. Such a tubular connecting element is relative, in particular with respect to the

Component weight, rigid, which allows an advantageous transfer of a swivel load from the bearing sleeve and / or the outer bearing ring of the pivot bearing of the fixed bearing on the floating bearing. Such a jacket opening in the pipe jacket of the connecting element can preferably be formed by punching and / or laser cutting. The same applies to shell openings, which are optionally formed in the bearing sleeve and / or in the bearing bush. The bearing sleeve forming part of the fixed bearing can in particular comprise a number of shell openings corresponding to the number of torsion webs of the swivel ring, through which a respective torsion web extends. On the other hand, the bearing bush forming part of the floating bearing, if present, may in particular at least one axially extending, i.e. form a larger extent in the direction of the longitudinal axis of the bearing bush (or the pinion shaft or the pivot bearing) having in the circumferential direction, shell opening, in a preferred combination with a directly contacting bearing of the outer bearing ring of the pivot bearing of the floating bearing in the bearing bush to an advantageous axial mobility of the Can contribute pivot bearing within the bearing bush.

In a particularly advantageous for manufacturing reasons

Embodiment of a steering gear to be produced according to the invention can be provided that the connecting element with the bearing sleeve and / or with the bearing bush is formed integrally and of the same material. Alternatively, however, a multi-piece configuration with a subsequent connection of the individual components may be advantageous, so that it can be provided that the bearing sleeve and / or the bearing bush formed as separated from the connecting element (s) component (s) and then preferably cohesively, in particular by welding (preferably laser welding), is connected to the connecting element / are. In this way, for example, before connecting to the Connection element provided mounting at least the respective pivot bearing within the bearing sleeve and / or be simplified within the bearing bush. For this purpose, it can accordingly be provided that at least the associated pivot bearing is inserted into the bearing sleeve still separated from the connecting element and / or into the bearing bush still separated from the connecting element prior to connection to the connecting element.

According to a preferred embodiment of a method according to the invention can also be provided that the bearing bush is formed as received in a sleeve member. This sleeve component may in particular be the stop element / stop sleeve already described whose stops on a wall of the receiving space limit the pivoting mobility of the pinion shaft guided by the fixed bearing. In particular, before the

Background of this functionality of the sleeve component / stop element

To achieve advantageous noise behavior during operation of the steering gear, may further preferably be provided that the sleeve member made of plastic or an elastomer is formed. For this purpose, it may be provided, in particular, that the sleeve component

- Designed as separated from the bearing bush component and then

(cohesively) is connected to the bearing bush or

- Is formed by (at least partial) molding of the bearing bush.

The steering gear to be produced according to the invention can in particular be part of a steering system, which furthermore has a rotationally driving manner with the pinion shaft of the steering gear

Steering gear may include connected steering motor. The gear of the

Steering gear can continue to be rotatably or rotationally drivingly connected to a steering shaft, in particular a steering column, the steering system. Such

Steering system may be designed in particular as a power steering system, in which by means of the steering motor, a supporting torque can be generated so that a driver of a power steering system comprehensive motor vehicle for steering the motor vehicle to be applied to the steering column steering torque reduced (possibly temporarily up to zero ). Alternatively, there is also the

Possibility to design such a steering system such that the steering motor (always) the entire steering torque required for steering is generated

(Especially for a so-called steer-by-wire functionality of the steering system or of the motor vehicle, in which no mechanical connection between a Steering handle (if still provided) and the steerable wheels is present).

The indefinite articles ("a", "an", "an" and "an"), in particular in the patent claims and in the claims generally explaining

Description, are to be understood as such and not as number words. Corresponding to this concretized components are thus to be understood that they are present at least once and may be present more than once.

The invention will be described below with reference to the drawings

Embodiments explained in more detail. In the drawings shows:

1 shows a longitudinal section through an inventively produced

Steering gear according to a first embodiment;

2 shows a longitudinal section through a fixed bearing, a connecting element and a bearing bush of a loose bearing for a steering gear according to the invention to be produced according to a second

Design shape;

3 shows a longitudinal section through the bearing component, the bearing sleeve of

Fixed bearing, the connecting element and the bearing bush according to FIG 2 comprises;

FIG. 4: the mounting component according to FIG. 3 in a perspective view. FIG

View;

5 shows a longitudinal section through a fixed bearing, a connecting element, a

Bearing bush and a stop sleeve of a movable bearing for a present invention to be produced steering gear according to a third embodiment;

FIG. 6 shows the component group according to FIG. 5 in a perspective view; FIG.

Fig. 7a to 7d: in each case a longitudinal section, the components which differ according to

Steps have resulted in the production of the component group according to Figures 5 and 6; 8 shows a longitudinal section through a mounting component in an alternative to that of the component group according to FIGS. 5 to 7

Design shape;

9: the storage component according to FIG. 8 in a perspective view

View; and

10 is a perspective view of the individual components of the

Storage component according to FIGS. 8 and 9 in the still unconnected state.

Fig. 1 shows the essential components of an inventive

Steering gear. This comprises a housing 1, within which a gear 2 and a meshing with the gear 2 pinion 3 are rotatably arranged in the form of a Schraubritzels. The pinion 3 and the pinion 3 comprehensive (screw) pinion shaft 4 are integrally formed in the form of a worm.

The gear 2 is fixedly mounted on an output shaft 5 of the steering gear. This output shaft 5, which has a toothing for a secure rotationally fixed connection with the gear 2 in the illustrated embodiment, for example, with a trained at least in one section as a rack handlebar, whereby the rack performs a translational movement in a known manner via Radlenkhebel ( not shown) in a pivoting movement of steerable wheels (not shown) of the motor vehicle can be translated. In the output shaft 5 may also be a steering column of a power steering system, which is connected to a steering wheel and a steering pinion on the

Handlebar acts.

The pinion shaft 4 has a drive-side end over which this with the

Output shaft of a steering motor (not shown, for example, an electric motor) is connectable. In the region of this drive-side end, the pinion shaft 4 is mounted in the housing 1 by means of a first bearing. This bearing is designed as a fixed bearing 6, which allows a pivoting of the pinion shaft 4 about a pivot axis 7 (see Fig. 6). This pivot axis 7 extends in FIG. 1 approximately perpendicular to

Plane. Such pivoting causes a deflection of the

drive-side end opposite end of the pinion shaft 4, which is mounted there by means of a movable bearing 8 in a corresponding receptacle of the housing 1. This movable bearing 8 is designed so that it allows the resulting from the pivoting deflection of this end of the pinion shaft 4.

Both the fixed bearing 6 and the floating bearing 8 each comprise a pivot bearing in the form of a ball bearing 9. In inner bearing rings 10 of these ball bearings 9, the corresponding portions of the pinion shaft 4 are supported, while outer bearing rings 11 of the ball bearing 9 in each bearing device 12, 13 stored are in turn received in the housing 1. The bearing devices 12, 13 are structurally designed so that they allow in the case of the fixed bearing 6, the pivoting of the pinion shaft 4 about the pivot axis 7 and in the case of the movable bearing 8, the deflection of the free end of the pinion shaft 4.

For this purpose, the bearing device 12 of the fixed bearing 6 comprises a bearing sleeve 14 with kreisringförmigem cross section, the inner side in a first longitudinal section, the associated ball bearing 9 and in a second longitudinal section receives an inner ring 16 of a pivot ring 15. This inner ring 16 of the pivot ring 15 and the outer bearing ring 11 of the ball bearing 9 are axially secured within the bearing sleeve 14 with the interposition of several annular discs 17, wherein the inner ring 16 with interposition of an annular disc 17 on the one hand to the outer bearing ring 11 of the ball bearing 9 and on the other on a first, circumferential shoulder 26, which forms a ring member 33 of the fixed bearing 6 at one axial end of the bearing sleeve 14 is supported. In the same way is that of the

Inner ring 16 of the pivot ring 15 distally located side of the outer bearing ring 11 of the ball bearing 9 with the interposition of an annular disc 17 on a second, circumferential shoulder 27, which forms the bearing sleeve 14 at this axial end, supported.

The swivel ring 15 comprises, in addition to the inner ring 16, an outer ring 18.

This outer ring 18 is connected to the inner ring 16 via two torsion webs 19 (see FIG. The outer ring 18, the inner ring 16 and the torsion bars 19 are preferably formed integrally from, for example, spring steel.

An axial position assurance of the inner bearing ring 10 of the ball bearing 9 of the

Fixed bearing 6 on the pinion shaft 4 takes place with the interposition of a pressure piece 20 by means of a screw 21 which is screwed into an internal thread which is integrated in the drive-side end of the pinion shaft 4. An axial position securing the outer ring 18 of the pivot ring 15 within the housing 1 by means of a Screw ring 22 having an external thread which is screwed into an internal thread of the housing 1.

The two torsion bars 19 define the position of the pivot axis 7 about which the outer ring 18 is pivotable relative to the inner ring 16 of the pivot ring 15. The torsion bars 19 of the pivot ring 15 not only allow pivoting of the outer ring 18 to the inner ring 16 and thus the pinion shaft 4 relative to the gear 2 and the housing 1, but at the same time cause the spring force by which the pinion 3 in the toothing of the Gear 2 is pressed in order to achieve the lowest possible backlash and thus the lowest possible noise during operation of the steering gear, especially in a Wechsellenken. This spring force results from the fact that during assembly of the steering gear, the pinion shaft 4 is deflected so far as a result of contact with the gear 2, that sufficient twisting of the torsion bars 19 results, whereby the elastic restoring moments resulting from this twisting of the torsion bars 19, Counteract the deflection of the pinion shaft 4 and thus act against the gear 2.

The bearing device 13 of the floating bearing 8 comprises a serving as a stop sleeve 23 sleeve component which is movable within one of the housing. 1

arranged receiving space 24 is arranged, that the pivoting movement about the defined by the fixed bearing 6 pivot axis 7 is possible within the limits of a constructively defined basic game. This basic game or this pivoting movement in one direction by a complete

or on each of two edges of the individual teeth of pinion 3 and gear 2 occurring contact, which is caused by the spring load by means of the twisted torsion bars 19, and in the other direction by a stop, by a contact of the stop sleeve 23, with a in one Receiving opening of the housing 1 arranged stop element 25 is formed limited. The depth with which the stop element 25 projects into the receiving space 24 can be adjustable at least once.

The steering gear further comprises a connecting element 28, which with the

Bearing sleeve 14 of the fixed bearing 6 is integrally connected and of uniform material. As is apparent from Figs. 1 and 3, the connecting element 28 is generally tubular with annular or part-circular-shaped cross-sections, wherein this has a shell opening 29 which in a central portion of the Connecting element 28 is arranged and which extends over a portion of the circumference thereof. Through this jacket opening 29, a portion of the gear 2 in the bounded by the connecting element 28 and the pinion shaft 4 receiving inner volume protrude to allow engagement of the teeth of the gear 2 and the pinion 3.

The connecting element 28 is further connected to a bearing bush 30 of the fixed bearing 6 in one piece and of the same material. The ball bearing 9 of the floating bearing 8 is axially movable with the associated outer bearing ring 1 1 within this

Bearing bush 30 stored. The bearing bush 30 in turn is inside in the

Stroke sleeve 23 of the floating bearing 8 stored.

By means of the connecting element 28 on the one hand causes the elastic restoring moments resulting from the torsion of the torsion bars 19 of the swivel ring 15 of the fixed bearing 6 are not transmitted exclusively via the ball bearing 9 of the fixed bearing 6 on the pinion shaft 4, resulting in a relatively high tilt load This ball bearing 9 would be connected. Rather, these are elastic

Return torques transmitted primarily via the bearing sleeve 14 of the fixed bearing 6 and the thus integrally connected connecting element 28 to the ball bearing 9 of the movable bearing 8.

The formed as an integral component combination of bearing sleeve 14 of the

Fixed bearing 6, connecting element 28 and bearing bush 30 of the movable bearing 8 of the steering gear according to FIG. 1, which is hereinafter referred to as a bearing component was formed by machining of a semi-finished, such as a rod or a pipe. The machining involved in particular a rotation of the bearing component and a milling for training u.a. the shell opening 29 of the connecting element 28 and two shell openings 31 of the bearing bush 30 through which the torsion bars 19 of the pivot ring 15 extend in the mounted state of the steering gear. The semifinished product and thus also the bearing sleeve 14, the connecting element 28 and the bearing bush 30, for example, may consist of a plastic or a metal, in particular steel. Although this type of production is relatively complex, but it can relatively small tolerances with respect to the shapes and layers, in particular the positions of the inner sides of the bearing sleeve 14 and the bearing bush 30 to each other, the

Alignment of the two pinion shaft 4 bearing pivot bearing 9 define each other, can be achieved. After mounting the remaining components of the fixed bearing 6 within the

Bearing sleeve whose position can be secured to each other by the ring member 33 is inserted into the corresponding end portion of the bearing sleeve 14 and with this cohesively, for example by welding or soldering, is connected.

The stop sleeve 23 of the movable bearing 8 consists of a thermoplastic

Plastic, which is preferably relatively soft or elastic to dampen noise as a result of contact with the stop member 25 during operation of the steering gear as much as possible. The stop sleeve 23 can be manufactured separately, for example by means of injection molding, and subsequently placed on the bearing bush 30 and connected thereto. Alternatively, it is possible to spray the stop sleeve 23 onto the bearing bush 30 as part of an injection molding process.

2 to 4 show an alternative embodiment of a bearing component and therefore a combination of a bearing sleeve 14 for a fixed bearing 6, a connecting element 28 and a bearing bush 30 for a movable bearing 8 of a

steering gear according to the invention, as it may otherwise correspond to that of FIG. In addition to the bearing component, the other components of the fixed bearing 6, i. the local ball bearing 9, the pivot ring 15 and two adjacent to the two sides of the inner ring 16 of the pivot ring 15 adjacent annular discs 17, shown.

The likewise integral bearing component according to FIGS. 2 to 4 differs from that according to FIG. 1 exclusively in the manner of production. Specifically, a production by deep drawing of a metallic blank is provided for this storage component. Subsequently, the jacket opening 29 of the

Connecting element and the two shell openings 31 of the bearing bush 30, through which in the mounted state of the steering gear, the torsion bars 19 of the

Swing ring 15 extend, introduced by punching or laser cutting.

This results in the state of the storage component, as shown in FIGS. 3 and 4. Subsequently, a mounting of the components of the fixed bearing 6, including the corresponding pivot bearing 9, the inner ring 16 of the pivot ring 15 and the two annular discs 17 in the axial direction, i. along the longitudinal axis 32 of the storage component, through the still fully open end of that

Lagerungsbauteils, which is formed by the bearing sleeve 14, inserted into the bearing sleeve 14 until the outer bearing ring 11 of the ball bearing 9 at the (second) Paragraph 27, which is arranged in the transition from the connecting element 28 to the bearing sleeve 14, strikes. Subsequently, the free end portion of the bearing sleeve

Formed radially inwardly 14 to form a (first) paragraph 26, so that then the components of the fixed bearing 6 are finally immovably positioned to each other. This reshaping of the free end portion of the bearing sleeve 14 may for example be done by tumbling, which is also known under the term "radial rivets".

FIGS. 5 to 7 show a further alternative embodiment of a

Storage component and therefore a combination of a bearing sleeve 14 for a fixed bearing 6, a connecting element 28 and a bearing bush 30 for a floating bearing 8 of a steering gear according to the invention, as it may otherwise correspond to that of FIG. In addition to the storage component, the other components of the fixed bearing 6, i. the associated ball bearing 9, the swivel ring

15 and two on the two sides of the inner ring 16 of the pivot ring 15 adjacent arranged annular discs 17, and a stop sleeve 23 is shown.

The mounting member according to FIGS. 5 to 7 is formed in several pieces, i. the bearing sleeve 14, the connecting element 28 and the bearing bush 30 were first prepared as separate components and then connected to form the storage component together, in particular welded. In this case, these components may be produced, for example, both by deep drawing and by winding from a respective sheet metal part. Particularly preferably, it can be provided that the bearing sleeve 14 and the bearing bush 30 were each made by deep drawing and the connecting element 28 by winding. The opening or side cutouts in the sheet metal part, which form the shell opening 29 in the wound state of the sheet metal part or in the connecting element 28, can preferably have been introduced before winding, for example by punching.

According to FIGS. 7a to 7d it can be provided that the component group according to FIGS. 5 and 6 is produced by first producing the bearing sleeve 14, the (second) stop 27, to which the connecting element 28 adjoins, being already formed becomes. Subsequently, the fixed bearing 6 is mounted, including the associated pivot bearing 9, the inner ring 16 of the pivot ring 15 and the two annular discs 17 in the axial direction, ie along the longitudinal axis 32 of the bearing member, inserted through the relative to the paragraph 27 distal end of the bearing sleeve 14 is until the outer bearing ring 11 of the ball bearing 9 abuts the shoulder 27. Subsequently, the axially outer annular disc 17 is materially connected to the bearing sleeve 14, for example by welding or soldering, whereby the components of the fixed bearing 6 are finally positioned firmly to each other. In this fixed bearing 6 thus forms the outer ring disk 17 a (first) paragraph 26 of the bearing sleeve 14 from.

After assembly of the fixed bearing 6, the previously produced connecting element 28 can be connected by welding, in particular, with the end of the bearing sleeve 14 which forms the shoulder 27 (cf., FIG. 7b). In the same way, the previously produced bearing bush 30 can then be connected to the still free end of the connecting element 28 (see FIG. Finally, it can then be provided to apply the stop sleeve 23 to the bearing bush 30, which in turn can be realized by a subsequent application of a previously separately prepared stop sleeve 23 or by spraying the intended for the formation of the stop sleeve 23 plastic.

5 and 7d can still be seen that the bearing bush 30 on the outside forms a securing projection 34 which engages in a correspondingly shaped recess of the stop sleeve 23 and thereby, optionally in addition to a cohesive connection between the bearing bush 30 and the stop sleeve 23, causes a rotation for these components.

Figs. 8 to 10 also show a multi-piece mounting member which may have been made as that shown in FIGS. 5 to 7. The storage component according to FIGS. 8 to 10 differs from that according to FIGS. 5 to 7 essentially only with regard to the configuration of the jacket opening 29 of the connecting element 28, which extends in the connecting element 28 according to FIGS. 8 to 10 over its entire length , Access character list Enclosure

gear

(Screw) pinion

(Screw) pinion shaft

Output shaft of the steering gear

fixed bearing

swivel axis

movable bearing

ball-bearing

Inner bearing ring of a ball bearing

outer bearing ring of a ball bearing

Storage device of the fixed storage

Bearing device of the floating bearing

bearing sleeve

swivel

Inner ring of the swivel ring

washer

Outer ring of the swivel ring

torsion

Pressure piece

screw

screw ring

Sleeve component / stop sleeve

accommodation space

stop element

first paragraph of the bearing sleeve

second paragraph of the bearing sleeve

connecting element

Shell opening of the connecting element

bearing bush

Shell opening of the bearing sleeve

Longitudinal axis of the connecting element, the bearing sleeve, the ball bearing, the bearing bush and the pinion shaft

Ring component of the fixed bearing 34 securing projection

Claims

claims:

1. A method for producing a steering gear for a steering system of

Motor vehicle, the

a housing (1),

- a gear (2),

a gear (2) meshing pinion (3) and

a pinion shaft (4) comprising the pinion (3),

wherein the pinion shaft (4) is mounted on one side of the pinion (3) in a fixed bearing (6) comprising a pivot bearing in which the pinion shaft (4)

is received and which is received in a bearing sleeve (14), and wherein the fixed bearing (6) further comprises a pivot ring (15) having an outer ring (18) and an inner ring (16) via one or more torsion bars (19 ) are pivotally connected to each other, wherein the inner ring (16) within the bearing sleeve (14) is connected or integrated in this and the outer ring (18) is arranged fixed in the housing (1),

-when the pinion shaft (4) on the other side of the pinion (3) in one

Moving bearing (8) is mounted, which comprises a pivot bearing in which the pinion shaft (4) is accommodated, wherein for the pivot bearing a radial mobility within the housing (1) is granted,

and wherein the bearing sleeve (14) and / or an outer bearing ring (11) of the

Pivot bearing of the fixed bearing (6) via an at least partially tubular connecting element (28) with an outer bearing ring (11) of the pivot bearing of the movable bearing (8) or a pivot bearing of the movable bearing (8) receiving bearing bush (30) is connected,

characterized in that the connecting element (28) and / or the bearing sleeve (14) and / or the bearing bush (30)

- by machining and / or

- by deep drawing and / or

- By winding from a sheet

is / are being trained.

2. The method according to claim 1, characterized in that by punching and / or laser cutting at least one jacket opening (29, 31) in the Connecting element (28) and / or in the bearing sleeve (14) and / or in the bearing bush (30) is formed.

3. The method according to any one of the preceding claims, characterized

characterized in that the connecting element (28) with the bearing sleeve (14) and / or with the bearing bush (30) is formed in one piece and of uniform material.

4. The method according to claim 3, characterized in that the bearing sleeve (14) and / or the bearing bush (30) formed as by the connecting element (28) separated component and then cohesively with the

Connecting element (28) is / are connected.

5. The method according to claim 4, characterized in that the joining is carried out by means of welding.

6. The method according to claim 4 or 5, characterized in that in the of the connecting element (28) separated bearing sleeve (14) and / in the of the connecting element (28) separated bearing bush (30) before connecting to the connecting element (28 ) At least the associated pivot bearing is used.

7. The method according to any one of the preceding claims, characterized

in that the bearing bush (30) is formed as received in a sleeve component (23).

8. The method according to claim 7, characterized in that the

Sleeve component (23) made of plastic or an elastomer is formed.

9. The method according to claim 7 or 8, characterized in that the

Sleeve component (23)

- As formed by the bearing bush (30) separated component and then connected to the bearing bush (30) or

- Is formed by molding the bearing bush (30) with a plastic.