WO2015139915A1

WO2015139915A1 - Pivoting motor of an active anti-roll bar for motor vehicles

Info

Publication number: WO2015139915A1
Application number: PCT/EP2015/053588
Authority: WO
Inventors: Ulrich Mair; Andreas Knoll; Georges HALSDORF; Andreas Zettlitz; Frank Richter
Original assignee: Zf Friedrichshafen Ag
Priority date: 2014-03-20
Filing date: 2015-02-20
Publication date: 2015-09-24
Also published as: DE102014205261A1

Abstract

The invention relates to a pivoting motor (1) of an active anti-roll bar for motor vehicles, comprising an electric motor (7) and a planetary gear mechanism (11) which is driven by the electric motor (7), wherein the electric motor (7) and the planetary gear mechanism (11) are arranged in a common housing. It is proposed that the housing comprises two part housings (3, 5), wherein the first part housing (3) is part of a first module and receives substantially the electric motor (7) therein, and wherein the second part housing (5) is part of a second module and receives substantially the planetary gear mechanism (11) therein.

Description

Swing motor of an active roll stabilizer for motor vehicles

The invention relates to a pivoting motor of an active roll stabilizer for motor vehicles according to the preamble of claim 1.

Stabilizers for motor vehicles are known, where passive and active

Stabilizers distinguishes. Passive stabilizers are designed as a torsion element, which has a mounted on the body stabilizer back and two angled lever-like ends, which are each connected to a wheel or wishbone. The stabilizer generated at one-sided compression of a wheel at fast cornering one of the rolling motion of the

Vehicle structure counteracting torsional moment. In active

Roll stabilizers is divided on the stabilizer back, and between the split stabilizer ends an actuator or swing motor is used, which in

Dependence on the lateral acceleration when cornering or other

Guide variables one of the rolling motion counteracting torque exerts on the stabilizer ends. As swivel motors on the one hand hydrostatic motors (hydraulic motors) or electric motors are known.

By EP 1 820 675 A1 a swing motor for an active

Roll stabilizer known, wherein the pivot motor is designed as an electric motor with a downstream three-stage planetary gear, which

on the output side aborts via a planet carrier. The electric motor and the

Planetary gears are received in a common integral housing with one side of the housing connected to a first stabilizer end. The second stabilizer end is connected via a driving teeth with the abortive planet carrier of the planetary gear. Upon activation of the electric motor, the two stabilizer ends are rotated against each other to one

Rolling motion of the vehicle body controlled counteract. at

deactivated or stopped electric motor, the stabilizer behaves like a conventional stabilizer without Versteilantrieb or swivel motor. It is an object of the present invention to design a swivel motor of the type mentioned production.

The object of the invention is solved by the features of claim 1. Advantageous embodiments emerge from the subclaims.

According to the invention, it is provided that the overall housing is constructed from at least two sub-housings, wherein the first sub-housing is part of a first module and substantially accommodates the electric motor and wherein the second sub-housing is part of a second module and substantially receives the planetary gear. Due to the modular design of the swing motor is an economical

Manufacturing possible, because both modules can be produced as a separate unit, d. H.

prefabricated and pre-tested before they are assembled into an overall system.

According to a preferred embodiment, the prefabricated modules are available via a common interface. Preferably, both are partial housings

hollow cylindrical and have the same diameter, so that they can be connected to each other frontally.

According to a further preferred embodiment, the first, the electric motor receiving module on a lid which is fügbar with the first housing part. The lid, which can accommodate a sensor unit, for example, is after the completion of the first module with the first part housing

composed. The lid also serves to connect a

Stabilizer half, d. H. to initiate a torsional moment.

According to a further preferred embodiment - after insertion of the electric motor - end shields are used in the end faces of the first part housing, which receive the shaft ends of the motor shaft. The electric motor is thus mounted on both sides in the first part housing. According to a further preferred embodiment, the end shields protrude beyond the end faces of the first sub-housing and form centering aids for the components to be joined, ie the second sub-housing and the cover. For a simple and quick installation of these components is possible, the centering also serve the preparation for a subsequent welding process.

According to a further preferred embodiment, the first and the second partial housing by a cohesive circumferential seam, preferably a

Weld seam connected together. Thus, a compound of high strength and tightness between the two sub-housings is produced, which the occurring during operation of the roll stabilizer stresses (bending and

Torsionsmomente) is fair.

According to a further preferred embodiment, the first part of the housing on the end facing away from the second housing part by another

cohesive circumferential seam connected to the lid. Thus, the lid, d. H. the connection to a stabilizer half firmly and tightly, in particular liquid or gas tight connected to the first part housing. Due to the circumferential seam or the two circumferential seams, the welding process can be carried out by a welding machine, whereby the production costs are reduced. The tightness ensures corrosion protection, since no foreign bodies can penetrate into the housing due to the weld seam.

According to a further preferred embodiment, the bearing plates are materially connected to the first part housing, preferably by the above-mentioned circumferential seam. Thus, the end shields are axially fixed in the sub-housing.

According to a further preferred embodiment, the planetary gear is at least one stage, ie formed with at least one wheel, which comprises a sun gear, planetary gears, a planet carrier and a ring gear, wherein the ring gear is integrated into the second housing part. The internal toothing of the ring gear is incorporated in particular in the inner circumference of the second part of the housing. According to a further preferred embodiment, the sun gear of the first set of wheels is formed integrally with the motor shaft. On the one hand, this results in a compact construction and a shortened assembly time; On the other hand eliminates a connector between Sonnenradwelle and motor shaft for transmitting the drive torque. Rather, the sun gear, ie the pinion shaft of the motor acts directly with the first set of wheels, ie the planetary gears form-fitting and in meshing engagement.

According to a further preferred embodiment, the first set of wheels on a helical toothing, wherein the ring gear of the first wheel set with

Helical toothing is produced as an additional component and inserted into the second part housing. Likewise, the second set of wheels may have a helical toothing, wherein a wider ring gear with helical teeth would be used for both wheelsets. Due to the helical gearing, a better power transmission during meshing, d. H. achieved a smoother running and a quiet driving the swing motor.

According to a further preferred embodiment, the ring gear used in the part housing is fixed in the tangential direction by the circumferential weld between the first and second part of the housing, so that the reaction torque of the wheelset is supported on the housing.

The invention further relates to a method for producing a

Swivel motor according to one of the embodiments described above. The method is characterized by the ones listed below but not

limiting steps, in particular not listed in their order:

- Providing a first and a second sub-housing, one

Electric motor, a planetary gear,

Joining the electric motor with the first sub-housing to form a first module,

- Join the planetary gear with the second sub-housing to a

second module, - Add the two modules to a common housing.

The joining of the components to one another, in particular the joining of the two modules to form a housing, takes place in a material-tight manner, in particular by welding,

preferably by circumferential seams.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below, which may result from the description and / or the drawing further features and / or advantages.

Show it:

Fig. 1 a pivot motor according to the invention, disassembled into a module with

Electric motor and a module with planetary gear (before assembly),

2 shows the swivel motor after mounting the modules,

3 shows the electric motor with integrated into the motor shaft pinion,

4 a set of wheels with helical teeth and inserted ring gear and

Fig. 5 two sets of wheels with helical teeth and inserted ring gear.

Fig. 1 shows a pivot motor 1 according to the invention prior to assembly, d. H.

disassembled into three modules, namely a first module 2 with a first housing part 3, a second module 4 with a second housing part 5 and a cover 6. In the first part of housing 3, an electric motor 7 is accommodated, which a

Motor shaft with two shaft ends 7a, 7b has. In the end faces of the cylindrical first part of the housing 3, a first bearing plate 8 and a second bearing plate 9 are used, via which the shaft ends 7a, 7b are mounted. The end shields 8, 9 each have over the end faces of the first part of housing 3 out standing cylindrical portions 8a, 8b, which are formed as centering for the components to be joined. On the first bearing plate 8, a sensor unit 10 is attached.

In the second part of the housing 5 of the second module 4, a three-stage planetary gear 1 1 is added, which three coupled wheelsets 12, 13, 14, each consisting of a sun gear, planetary gears, a planetary carrier and a ring gear. The planet gears of the three sets of wheels 12, 13, 14 mesh with the same ring gear 15, which is integrated into the second housing part 5 in such a way that an internal toothing 15 in the second housing part. 5

is incorporated. The sun gear shaft 12a of the first planetary gear set 12 forms the transmission input shaft and can be coupled via a positive plug-in connection with the shaft end 7b of the motor shaft of the electric motor 7. The third, d. H. the output side gearset 14 has a solid in the drawing planet carrier 1 6, which has a double-row angular contact ball bearings 17th

relative to the second housing part 5 is mounted in such a way that it can accommodate both radial and axial forces and bending or tilting moments. The planet carrier 1 6 has on the output side a hollow cylindrical design

Connecting piece 1 6a, which protrudes from the end face of the second part housing 5 and the attachment of a stabilizer half, not shown here, is used. On the first part of the housing 3 facing end face, the second

Part housing 5 a recess or shoulder 5a, which serves as Zentrierabsatz and is joined to the centering 9a of the second bearing plate 9. Centering 9a and centering 5a thus form the interface of the two sub-housing 3, 5th

Fig. 2 shows the swivel motor 1 after assembly, ie in the assembled state. The first sub-housing 3 and the second sub-housing 5 are materially connected to each other at the end face via a circumferential weld 18. On the other hand, the first part housing 3 is materially connected to the cover 6 via a further peripheral weld seam 19. The two circumferential welded seams 18, 19 can each extend with their root into the peripheral region of the end shields 8, 9, so that they are fixed in the first part housing 3. The cover 6 has a hollow cylindrical connecting piece 6a at the end, in which the end of a stabilizer half 20 is inserted and preferably connected in a materially bonded manner to the socket 6a. In an analogous manner, arranged on the opposite end side connecting piece 16a of the planet carrier 1 6 with one end of a second stabilizer half 21 is materially connected. The electric motor 7 and the planetary gear 1 1 are rotatably connected to each other via a plug connection of the shaft end 7b and the sun gear 12a. When activating the Electric motor 7, the stabilizer halves 20, 21 charged with opposing torsional moments.

Fig. 3 shows a further embodiment of the invention, wherein the same reference numerals as previously used for the same or analogous parts. Of the

Electric motor 7 has a motor shaft 22, in the shaft end a

Pinion teeth 23 is incorporated. The sun gear 23 of the first gear set 12 is thus formed integrally with the motor shaft 22. In this respect, eliminates a plug-in coupling, as shown in the embodiment of FIGS. 1 and 2. The pinion 23 and the other gears of the three-stage planetary gear 1 1 have a degree of toothing, which is why a common ring gear 15 and a continuous internal toothing 15 is possible.

Fig. 4 shows a further embodiment of the invention, a pinion 24 with

Helical toothing, also integrally formed with the motor shaft 22. Since a helical gearing is provided only for the first gearset 12, and the second and third gearset 13, 14 have a straight toothing, a ring gear 25 with internal helical gearing is inserted into the first and second subhousings 3, 5, which is tangential by the circumferential weld seam 18 Direction can be secured. For the other two wheelsets 13, 14 remains the integrated

Internal teeth 15 obtained.

Fig. 5 shows a further embodiment of the invention, wherein the first and the second wheelset 12, 13 have a helical toothing. Consequently, as an additional component, a wider ring gear 26 with internal helical teeth

provided, which within the first and second part of the housing 3, 5

is received and extends over the axial depth of the first two sets of wheels 12, 13. For the third set of wheels 14, the integrated internal teeth 15 in the second part of the housing 5, also called ring gear housing 5 is obtained. Again, the formed as an additional component ring gear 26 can be secured by the circumferential weld 18 in the tangential direction for receiving the reaction torque. REFERENCE CHARACTERS

swing motor

first module

first part housing

second module

second sub-housing

a recess

cover

a nozzle

electric motor

a wave end

b shaft end

first end shield

a centering aid

second bearing plate

a centering aid

0 sensor unit

1 planetary gear

2 first wheelset

2a sun gear shaft

3 second wheelset

4 third wheelset

5 ring gear / internal toothing

6 planet carriers

6a neck

7 Angular contact ball bearings

8 weld

9 weld

0 stabilizer half

1 stabilizer half

2 motor shaft

3 pinions Pinion (helical teeth) ring gear (helical teeth) ring gear (helical teeth)

Claims

claims

1 . Swivel motor of an active roll stabilizer for motor vehicles, comprising an electric motor (7) and a by the electric motor (7) driven planetary gear (1 1), wherein the electric motor (7) and the planetary gear (1 1) in one

common housing are arranged, characterized in that the

Housing two sub-housing (3, 5), wherein the first part housing (3) is part of a first module (2) and substantially the electric motor (7) receives in it and wherein the second part housing (5) part of a second module (4 ) is and im

Essentially receives the planetary gear (1 1) in itself.

2. Pivoting motor according to claim 1, characterized in that the first and the second module (2, 4) each separately as a unit to produce and via a common interface (5a, 9a) are joined together.

3. swivel motor according to claim 1 or 2, characterized in that the first the electric motor (7) receiving module (2) has a cover (6), which with the first part housing (3) is available.

4. Pivoting motor according to claim 1, 2 or 3, characterized in that the electric motor (7) has a motor shaft (7a, 7b), wherein the end face in the first housing part (3) bearing plates (8, 9) are inserted or used and that the motor shaft (7a, 7b) is mounted or storable in the end shields.

5. swivel motor according to claim 4, characterized in that the bearing plates (8, 9) in the region of its outer periphery as centering aids (8a, 9a) for the second part housing (5) and / or for the cover (6) are formed.

6. Pivoting motor according to one of claims 1 to 5, characterized in that the first and the second partial housing (3, 5) by a cohesive weld, in particular peripheral seam (18) are interconnected.

7. Pivoting motor according to one of claims 1 to 6, characterized in that the first part housing (3) and the cover (6) by a cohesive

Weld, in particular circumferential seam (19) are interconnected.

8. Pivoting motor according to claim 6 or 7, characterized in that the

Bearing shields (8, 9) are integrally connected to the first part housing (3).

9. swivel motor according to one of claims 1 to 8, characterized in that the planetary gear (1 1) at least one stage with at least one wheelset (12, 13, 14), comprising a sun gear, planet, planet carrier and a ring gear, and formed that at least one ring gear (15) in the second housing part (5) is integrated.

10. swivel motor according to claim 9, characterized in that the sun gear (23, 24) of the first wheel set (12) is formed integrally with the motor shaft (22).

1 1. Pivoting motor according to claim 9 or 10, characterized in that the at least one wheel set (12) has a helical toothing and that a

Ring gear (25) with helical teeth as an additional component in the second

Part housing (5) can be used.

12. swing motor according to claim 1 1, characterized in that the ring gear (25) by the circumferential seam (18) is fixed in the circumferential direction.

13. A method for producing a swing motor according to one of the preceding claims 1 to 12, characterized by the steps:

Providing a first and a second sub-housing, one

Electric motor, a planetary gear,

Joining the electric motor with the first sub-housing to a first module, joining the planetary gear with the second sub-housing to a second module,

Joining the two modules to a common housing.

14. A method for producing a pivoting motor according to claim 13, wherein the joining material fit, in particular by welding, preferably by circumferential seams is performed.