EP3123061A1

EP3123061A1 - Transmission actuator for a motor vehicle transmission

Info

Publication number: EP3123061A1
Application number: EP15711419.0A
Authority: EP
Inventors: Thomas Wacker; Markus Dietrich; Jens MÜHLHAUSEN; Volker Kretz-Busch; Matthias Ehrlich; Jie Zhou
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2014-03-26
Filing date: 2015-02-24
Publication date: 2017-02-01
Also published as: JP2017508935A; CN106133403A; EP3123062A1; DE112015001436A5; KR20160137548A; US10260626B2; KR102247256B1; CN106104100A; US20170122432A1; CN106133407B; US20170152941A1; JP2017512950A; WO2015144147A1; CN106133407A; KR20160137538A; EP3123062B1; DE112015001447A5; JP6559155B2; KR20160137549A; DE112015001417A5

Abstract

A transmission actuator for a manual transmission of a motor vehicle is configured as a single-motor transmission actuator and is suitable for carrying out shifting and selecting operations. The transmission actuator has a first housing assembly, in which the single motor is arranged. The transmission actuator also has a second housing assembly, in which an actuator unit is arranged, said actuator unit comprising a spindle drive, which is provided for carrying out shifting operations, and a cam mechanism, which is provided for carrying out selecting operations. A common interior of the two housing assemblies is sealed by a static seal arranged between the first housing assembly and the second housing assembly. Two shafts arranged in the common interior, namely a drive shaft provided as the input shaft of the actuator unit and a measuring shaft provided for detecting a state of a mechanical component of the actuator unit, extend from the first to the second housing assembly.

Description

Transmission actuator for a motor vehicle transmission

The invention relates to an actuator designed as a motor-driven actuator for a motor vehicle transmission. A single-motor-transmission reactor allows for the execution of dialing operations, and with the aid of a single motor, typically electric motor

Switching operations in a manual transmission of a vehicle. Single-engine gearbox actuators can be used in vehicles powered by internal combustion engines as well as in hybrid vehicles. In principle, the use in an electric vehicle is conceivable, if this has a manual transmission.

An actuator designed as a single-motor gearbox actuator for a motor vehicle transmission and an associated operating method is disclosed, for example, in DE 10 2006 054 901 A1. An electric motor of this gear actuator drives via a gear stage to a threaded spindle. An opposite to the threaded spindle rotatable eccentric device is adapted to cause an axial movement of a switching shaft of the motor vehicle transmission. The mentioned axial movement is a dialing operation. In contrast, the shift shaft is pivoted in a switching operation. The pivoting of the switching shaft via a rack and pinion gear, which is driven by the spindle gear.

DE 10 2004 038 955 A1 likewise discloses an actuating device for a motor vehicle transmission, which ensures a selection function and a switching function during the gear change. The actuating device is designed to insert at least three different target gears alternatively, without switching to an intermediate passage in between.

Another single-engine gearbox actuator is disclosed, for example, in DE 10 2013 207 871 A1. In this case, a dial pad with a slide track is provided to convert a rotary movement into a translational movement, that is to say dialing movement. The rotational movement is diverted from a spindle gear. The same spindle gear is used, as with DE 10 2006 054 901 A1, to next to convert a rotational movement of a spindle in a translational movement of a spindle nut and in turn from this translational movement via a rack gear a rotary movement, namely a pivoting movement of a switching shaft, that is to generate a switching movement.

The invention has for its object to further develop a one-motor gearbox actuator relative to the cited prior art, in particular with regard to a favorable relationship between production costs and long-term reliability.

This object is achieved by a gear actuator with the features of claim 1 and by a method for assembling a

Getriebeaktors according to claim 10. In the following in connection with the assembly process explained embodiments and advantages apply mutatis mutandis to the device, that is, the gear actuator, and vice versa.

The completely assembled transmission actuator, which is designed as a single-motor transmission reactor for carrying out switching and selecting operations in a manual transmission, in particular of a motor vehicle, has two rigidly interconnected

Housing assemblies on. In the first housing assembly is the engine, in particular electric motor, the gear actuator. The engine is, for example, an electronically commutating electric motor. In principle, another motor, for example a hydraulic motor, may be provided as the sole motor of the gear actuator instead of an electric motor.

In the second housing assembly is in each case an actuator unit, which includes a spindle drive used in switching operations and a cam gear used in dialing. The spindle drive is in this case used to convert a rotary movement, namely rotation of a spindle, via a linear movement, namely displacement of a spindle nut, again into a rotary movement, namely pivoting of a switching shaft. A drive shaft, which is driven by the motor of the gear actuator, represents an input shaft of both the spindle drive and the cam gear. Like the spindle drive, the cam gear sets a rotary motion in a linear motion, which in the case of the cam gear in the linear movement of a Displacement of the shift shaft in the longitudinal direction is. The cam gear is preferably realized by means of a dial pad, which is designed such that a rotational movement in the same direction, which is accompanied by a rotation of the shaft of the electric motor in a certain direction of rotation, is translated into linear movements with changing direction. In manufacturing technology favorable manner, the dial is preferably constructed in two parts, wherein the pitch extends along the curved path of the cam gear. With the aid of a freewheel, which is connected between the electric motor and the cam gear, is caused to be switched in a reversal of the rotational direction of the electric motor of a selection movement to a switching movement.

For detecting a state of a mechanical component of the actuator unit, a measuring shaft is provided. The measuring shaft extends from the first housing assembly to the second housing assembly as well as the drive shaft through which both the spindle drive and the cam gear are actuated. Further moving parts, which couple the two housing assemblies together, are not provided in a preferred embodiment.

Instead of the movement and / or angular position of a mechanical element of

Actuator to detect directly or as close as possible to the relevant element and electrically forward the detected signal, according to the invention via the preferably multi-part, acting as a mechanical compensating element measuring wave first a signal purely mechanically from the second to the first

Housing module passed and converted there into an electrical signal. The portion of the measuring shaft, which by an associated, in the first

Housing assembly is scanned integrated sensor is preferably - with respect to its axial position - in a mechanically defined position, in particular with defined Tem, small distance from the sensor, rotatably mounted in the first housing assembly, the bearing can be designed as a sliding bearing.

An interior of the gear actuator extends into both housing assemblies. By a static, between the first housing assembly and the second

Housing assembly arranged seal the common interior of the two housing assemblies is sealed. When installing the gear actuator, mechanical components can first be installed in the second housing assembly, whereby they are introduced through an opening in the wall of this housing assembly, before the opening is closed by the first housing assembly.

Preferably, the seal used between the two housing assemblies is designed as a form-seal enclosing both shafts, which also surrounds annular centering contours on connecting sides of the two housing assemblies in an annular manner. The Zentrierungskonturen on the first housing assembly are preferably formed as a collar which projects into the second housing assembly and there next Zentrierungs- and sealing functions fulfills other functions, in particular serves as a fixing element which secures at least one functional element such as a spindle bearing in the second housing assembly. While the centering contours on the housing assemblies preferably each have a constricted shape derived from an oval shape, the outer contour of the seal, according to one possible embodiment, describes a smooth, oval curve, ie one Closed curve whose curvature over the entire circumference has no sign change. For example, the outer contour of the seal describes an elongated, rounded shape, wherein two straight, opposite longitudinal sides are connected to each other by rounded areas, in particular circular arcs. When inserted in the gear actuator seal the constriction of Zentrierungskonturen between the parallel longitudinal sides of the seal. On both longitudinal sides of the seal is in an advantageous embodiment in each case an inwardly facing, the shape of the constriction adapted inner contour the seal, which is supported on the constriction and also facilitates the correct installation of the seal.

The first housing assembly includes in an advantageous embodiment in addition to the motor and a controlling this electronic unit. This electronic unit preferably has the sensor which is provided for detecting an angle information transmitted by the actuator unit by means of the measuring shaft. In particular, this may be an angle information relating to an element operatively connected to the cam gear. This element may be an intermediate gearwheel, which is between a selector dial of the cam gear and a spindle nut of the spindle gear. The measuring shaft is in this case rotatably coupled to the intermediate gear.

In addition to the sensor cooperating with the measuring shaft, in a preferred embodiment the electronic unit has a further sensor cooperating with the drive shaft. Both sensors are preferably arranged on the side facing away from the second housing assembly of the engine.

In an advantageous embodiment, the drive shaft and the measuring shaft are arranged parallel to one another, wherein the electronic unit comprises a normal to the two waves arranged board which is extended so that it is cut by the axes of rotation of both waves. In an analogous manner to the sensor cooperating with the measuring shaft, a sensor cooperating with the drive shaft is preferably also arranged on the circuit board. Each sensor is designed to detect the angular position and / or rotation of the associated shaft, that is drive or measuring shaft, wherein on the respective shaft preferably a permanent magnet, in particular hard ferrite magnet, is arranged to provide information to the associated sensor transferred to. While the sensor detecting the rotation of the drive shaft preferably acts as an incremental encoder and is used for commutation of the electric motor, the sensor cooperating with the measuring shaft, also referred to as selector path sensor, preferably delivers one

Absolute value information about the angular position of the corresponding shaft, that is the measuring shaft, which can be waived in normal operation of the single-motor gear actuator on the approach of a reference position. In a learning phase under laboratory conditions, the relationship between indicated absolute positions of the Wählwegsensors and the associated actual positioning of the actuator can be determined using external sensors. With the absolute angular information readily available during operation of the one-motor gearbox actuator, states of the one-motor gearbox actuator can be detected, among others, in which the direction of rotation of the electric motor is to be reversed. By combined evaluation of the signals supplied by both sensors, for example, can be clearly concluded that a switching movement when the drive shaft rotates and at the same time does not rotate the measuring shaft, which is synonymous with a stoppage of the cam gear of the actuator unit. In a rational manner, identical sensors and associated magnets can be used in the gear actuator.

The circuit board, on which the two sensors cooperating with the drive shaft or with the measuring shaft are located, is preferably arranged on the side of the motor facing away from the second housing assembly, on an end face of the first housing assembly, and glued surface-to-surface with a supporting metal component of the gear actuator , The board is in this case in a plane which is parallel to the plane in which the switching shaft is located. Compared to the interior of the gear actuator, the board is statically sealed. Components of the motor, which is controlled by the board, comprehensive, integrated into the first housing assembly electronics unit, also meet sealing functions in an advantageous embodiment, for example in the form of a plastic extrusion of the stator of this engine, that is, the single motor of the one-motor transmission actuator. To seal the engine with respect to the lubricant-supplied interior of the single-motor gearbox, a dynamic seal acting between the rotor and the stator is also suitable, which is combined with a rolling bearing supporting the rotor to form a structural unit. Both the drive shaft and the measuring shaft, in each case in cooperation with other components of the gear actuator, preferably designed such that a limited displacement of the two housing assemblies to each other in the axial direction is possible without affecting the functionality of the gear actuator. The term "axial" here refers to the axis of rotation of the drive shaft The drive shaft and the measuring shaft are preferably arranged parallel to one another and orthogonal to the switching shaft of the gearbox that can be displaced and pivoted by means of the actuator unit.

In the case of the drive shaft, an axial compensation between the housing assemblies, for example in embodiments in which the drive shaft, which is identical or fixedly connected to the motor shaft of the electric motor, drives the spindle drive via a gear. The transmission is designed as a reduction gear and has, for example, a belonging to the actuator ring gear, an external toothing of the drive shaft meshes with an internal toothing of the ring gear. The connected to the ring gear spindle of the spindle drive drives a spindle nut whose displacement is preferably converted in the axial direction via a rack gear in a pivoting movement of the shift shaft. The actuator unit attributable rack gear in a possible embodiment comprises two racks, which are coupled with two the shift shaft in switching movements actuated gears, that in one and the same drive direction of the electric motor and direction of displacement of the spindle nut, the shift shaft pivots either in one or in the opposite direction becomes. In another possible, functionally comparable embodiment, the rack gear comprises only a single rack, which may be identical or fixedly connected to the spindle nut of the spindle drive. By pivoting the rack about the spindle axis is optionally one or the other of said gears, which pivot the shift rod driven. The spindle nut, which forms a component of the rack and pinion gear, is supported in a circumferential direction in the first axial region of the spindle and thus displaceable with a driven spindle, as is usual in a spindle drive, without rotating while in a second axial region of the spindle the spindle nut is rotatably coupled to the spindle, whereby the spindle drive is deactivated as a linear drive. In the case of the measuring shaft, an axial compensation between the housing assemblies can be realized, for example, by a multi-part construction of the measuring shaft, wherein in each case a part of the measuring shaft of the first or the second

Housing assembly is attributable. An assembly of the measuring shaft thus takes place only with the assembly of the first housing assembly to the second

Housing assembly.

The single-motor gearbox actuator preferably comprises a co-axial with the shift shaft arranged shift drum with scenes. These scenes or a finger engaging in the scenes of the actuator have or, in an advantageous embodiment, in each case only a one-sided chamfer. This retraction movements of the finger in a backdrop against the direction, which is determined by the already mentioned in connection with the cam gear freewheel, and thus also stresses avoided within the gear actuator. Before inserting a gear spindle and spindle nut of the spindle drive are preferably brought to a standstill, which is in terms of precision of the subsequent switching movement, that is, the retraction of the finger in a backdrop, advantage. To prevent unwanted switching movements, a detent is preferably provided in the region of the spindle drive facing away from the first housing assembly, which detent comprises, for example, a detent sleeve.

The second housing assembly, in which the actuator unit is located, can be rationally fastened to a transmission housing of the gearbox by, for example, forming methods. In contrast, the two housing assemblies are preferably firmly connected to each other by screw. By tightening the corresponding screws, for example, four pieces, the interior of the one-motor gearbox actuator, which extends into both housing assemblies inside, sealed to the outside. The assembly process with which the two

Housing assemblies are attached to each other, does not include mounting a shaft seal. As a material for the production of the first housing assembly is particularly suitable aluminum or a light metal alloy, also based on magnesium, wherein the stator of the electric motor located in the first housing assembly preferably pressed into the light metal component - alternatively: screwed and / or clamped with additional loaned components - is. As well as the stator are also bearing rings of rolling bearings, in particular ball bearings, the electric motor, which constitute a bearing of the rotor of the electric motor and thus also the drive shaft, can be pressed into the light metal component, so that particularly short tolerance chains can be realized. Two rolling bearings with which the rotor of the electric motor within the first

Housing assembly is mounted, may be formed as a fixed bearing and floating bearing, wherein the fixed bearing on the second housing assembly side facing the electric motor and the floating bearing on the opposite side, that is the electronics unit side facing the electric motor.

The correct alignment of the two housing assemblies of the gear actuator to each other by Zentrierungskonturen on connecting sides of the two

Casing assemblies accomplished. In particular, by an unspecified 5-point centering, wherein contours of the first housing assembly engage in contours of the second housing assembly, a precise coupling is ensured. With regard to the positioning of mechanical components with the aid of a 5-point centering, reference is made by way of example to DE 2 365 084 A.

When assembling the housing assemblies, two fitting diameters are first pushed into each other on the two housing assemblies in such a way that a centering is provided and only one rotational degree of freedom remains. This remaining degree of freedom is then locked by making contours of the first

Housing assembly, for example in the form of lugs or rounded surface portions, generally referred to as alignment surfaces, engage from inside into corresponding contours of the second housing assembly. The aforementioned contours of both housing assemblies meet next positioning and sealing functions, with a simple disassembly of the gear actuator in the individual

Housing assemblies, such as for testing or repair purposes, at any time remains possible. The opening surface of the second housing assembly, to which the first housing assembly is connected, represents in a preferred, particularly advantageous mounting technology embodiment the largest of a plurality of opening surfaces of the second housing assembly. Each of these opening surfaces of the second

Housing assembly is in the operation of the one-motor transmission actuator either by another, functional elements containing assembly - especially the first

Housing assembly - or closed by a pure cover. In a single step, a geometrically defined, inner-space-terminating coupling between the housing assemblies as well as a torque-transmitting connection and a metrological, namely angular position detecting coupling between the two housing assemblies can be produced during assembly.

The seal acting as a static seal between the two

Housing assemblies encloses in an advantageous embodiment, a collar of the first housing assembly, which - fulfilling the described centering and alignment functions and sealing functions - engages in the second housing assembly and contacts a preferably annular securing element, which in turn contacted a bearing ring of the spindle bearing within the second housing assembly and so that the spindle bearing of the actuator unit secures in the axial direction.

Of particular advantage is the fact that the first housing assembly, that is, the housing assembly in which the electric motor is located, can be completed and subjected to a functional test before it is attached to the second housing assembly. Herein, a particular, unitarily configured type of first housing assembly may be provided to be selectively assembled with different types of second housing assemblies. Thus, a versatile combinable kit of housing assemblies, which is characterized by a simple interchangeability of components, namely

Housing assemblies, and characterized by standardized test and assembly steps, feasible. For example, the one-motor gearbox actuator is suitable as part of the external transmission circuit for use in a dual-clutch transmission or other automated manual transmission. In the case of a dual-clutch transmission which can be actuated by the one-motor gear shift shaft is preferably provided between two sub-transmissions, that a first movement of the shift shaft engaging a gear of the first sub-transmission and a second, also executable by the one-motor gear actuator movement of the shift shaft, the insertion of a Ganges the second partial transmission causes. If optional pivoting movements or linear movements of one and the same shaft in another application, for example in a brake, clutch or chassis actuator or in a stationary machine to perform, also for this purpose the one-motor gear actuator can be used.

An embodiment of the invention will be explained in more detail with reference to a drawing. Herein show:

1 and 2 two housing assemblies of a gear actuator, each in a perspective view,

3 shows the housing assembly of FIG. 1 in a further perspective view,

Fig. 4 shows an arrangement between the housing assemblies of

Gear actuator provided seal

Fig. 5 and 6, the gear actuator in sectional views. A generally designated by the reference numeral 1 gear actuator is designed as a single-motor gearbox and provided for performing switching movements and Wählbewegungen in a transmission, not shown, of a motor vehicle. With regard to the basic function of the one-motor transmission actuator 1, reference is made to the cited prior art.

The gear actuator 1 is composed of two housing assemblies 2, 3 which in Fig. 2 and in Figures 1 and 3 isolated and in Fig. 5 and Fig.6, which shows an enlarged, more detailed section of Fig. 5, shown in the assembled state are. The first housing assembly 2 is also referred to as a drive unit, the second housing assembly 3 as an actuator mechanism. A motor 4, namely electric motor, as well as an associated electronic unit 5 are components of the drive unit 2. Only a rudimentary a shift shaft 6 of a gearbox is shown in Figure 1. The switching shaft 6 is displaceable by the gear actuator 1 in the linear direction L and pivotable in the circumferential direction U. Basically, the gear actuator 1 is designed to perform either a pivoting movement or a switching movement, with transitions between the two types of movement, that is, movement phases in which the switching shaft 6 at the same time in the linear direction L is moved and pivoted in the circumferential direction U, can be given.

For carrying out the adjusting movements of the switching shaft 6 described, an actuator unit 7 is integrated into the second housing assembly 2, which comprises various gear components, in particular a spindle drive 8 and a cam mechanism 9. During switching operations, the spindle drive 8 comes in dialing operations and the cam mechanism 9 is used.

For torque-transmitting and metrological coupling between the housing assemblies 2, 3, two shafts 10, 1 1, namely a drive shaft 10 and a measuring shaft 1 1, are provided. The drive shaft 10, which is identical to the shaft of the electric motor 4 and supported by two rolling bearings 12, 13, has an outer toothing 14, which meshes with an internal toothing 15 of a ring gear 16, which is part of the actuator unit 7. By the drive shaft 10 and the ring gear 16 is thus a gear 17, namely reduction gear, between the first

Housing assembly 2 and the second housing assembly 3 is formed. The drive shaft 10 represents an input shaft of both the spindle drive 8 and the cam gear 9, wherein power is transmitted from the drive shaft 10 via intermediate gear elements into the respective gear, that is to say the spindle drive 8 or the cam gear 9. The drive shaft 10 and the ring gear 16 are dimensioned such that a torque-transmitting coupling between the housing assemblies 2, 3, even with an axial offset between the

Housing assemblies 2, 3 - as long as a certain tolerance range is not exceeded - guaranteed. The term "axial offset" here refers to the axis of rotation of the drive shaft 10, that is to say the axis of the electric motor 4. The ring gear 16 is fixedly connected to a spindle 18 of the spindle drive 8, and the associated spindle nut is identified by the reference numeral 19. The bearing of the spindle 18 in the second housing assembly 3 by means of a rolling bearing 20 which is axially - with respect to the spindle 18 - between the ring gear 16 and the spindle nut 19 is arranged.

In contrast to the drive shaft 10, the measuring shaft 1 1 multi-part, namely from an auxiliary shaft 21 and a magnetic carrier 22, constructed. The auxiliary shaft 21 is fixedly connected to an intermediate gear 23, which is arranged in the second housing assembly 3 and forms a transmission component between the spindle drive 8 and the cam gear 9. In the case of selection movements, the intermediate gearwheel 23 directly or indirectly rotates a dialing pot 24 which is only partially shown in FIG. 5 and which is part of the cam mechanism 9. Thus, the intermediate gear 23 is an operatively connected to the cam gear 9 element.

The pivot axis of the dial pot 24 coincides with the axis of symmetry of the switching shaft 6 and is thus oriented orthogonally to the drive shaft 10 and to the spindle 18. Between the selector pot 24 and another, not shown component of the cam gear 9, a curved track for rolling elements is formed, which serves to convert the rotation of the dial pot 24 in a linear movement of the switching shaft 6. In contrast, there are no linear movements within the spindle drive 8, which are transmitted to a linear movement of the switching shaft 6. Rather, in the drive of the intermediate gear 23 via the spindle drive 8, the spindle nut 19 rotatably coupled to the spindle 18 to thereby drive the intermediate gear 23. The spindle drive 8 thus acts in this process, which is performed in the context of the selection process, that is, the displacement of the switching shaft 6, not as a transmission for the implementation between a rotary and a linear movement.

At its end facing the first housing assembly 3, the auxiliary shaft 21 has an outer toothing 25 which corresponds to an internal toothing 26 of the sleeve-shaped magnet carrier 22, with which a plug connection 27 is formed which permits a limited axial offset between the housing assemblies 2, 3. The magnet carrier 22 carries on its side facing the electronics unit 5 a magnet 28, namely hard ferrite magnets. In an analogous manner carries the drive shaft 10 on the corresponding side, that is, the second housing assembly 2 side facing away, a magnet 29, which is also a hard ferrite magnet. The magnets 28, 29 cooperate with sensors 30, 31, which are arranged on a circuit board 32 of the electronic unit 5. The two arranged in a plane on the board 32 sensors 30, 31 are, like the entire board 32, disposed on that side of the motor 4, which is the second

Housing assembly 3 is turned away. The first housing assembly 2, in which the electronic unit 5 is located, is the front side, that is on the side of the electronic unit 5, completed by a cover 33, wherein an adhesive seal 34 is provided for its sealing. On the opposite side is between the housing assemblies 2.3 formed as a molded seal seal 35. The gear actuator 1 is thus sealed by a plurality of static seals 34,35, being open to the gearbox, which is a simple lubrication of the gear actuator 1 through the Lubricant of the gearbox allows. At facing, with 36, 37 designated connecting sides, the housing assemblies 2, 3 closed Zentrierungskonturen 38, 39, which mesh in the assembly of the housing assemblies 2, 3 and support a simple, correct assembly of the gear actuator 1. In this case, the centering contours 38 of the first housing assembly 2 lie within the centering contours 39 of the second housing assembly 3.

During assembly of the gear actuator 1, the first housing assembly 2 is positioned geometrically correct relative to the second housing assembly 3 in a single step, wherein at the same time a torque transmitting or angular information transmitting connection between the drive unit 2 and the actuator mechanism 3 is made by the shafts 10, 1. In each of FIGS. 1 and 2, four screwing points 40, 41 can be seen, which enable the second housing assembly 3 to be screwed onto the first housing assembly 2. The Verschraubungsstellen 40, 41 are arranged outside the centering contours 38, 39 in a rectangular pattern.

It is possible for the first housing assembly 2 to be attached to the second housing assembly 3 during assembly of the gear actuator 1 and to be screwed thereto when the second housing assembly 3 is already firmly connected to the manual transmission. Previously, the drive unit 2 can be subjected to a functional test, wherein it can be screwed by means of the screwing 40 to a test apparatus. In a basically comparable manner, the actuator mechanism 3 can also be subjected to a separate functional test. Alternatively to the second housing assembly 3, the drive unit 2 can also be connected to a differently designed actuator mechanism, provided that it has the same Zentrierungskonturen 39 and screw 41 as the second housing assembly 3. The modular design of the gear actuator 1 of the housing assemblies 2, 3 also allows easy replacement of one of the housing assemblies 2, 3, in particular the drive unit 2, in the case of a defect of the corresponding housing assembly 2, 3rd The isolated shown in Figure 4, between the connecting sides 36, 37 of the

Housing assemblies 2, 3 used seal 35 is formed as a molded seal with a non-circular, namely largely approximately rectangular, rounded cross-section. The seal 35 rests on sealing surfaces 46, 47 which are located on the connecting sides 36, 37 on. According to the shape of the sealing surfaces 33, 34, the seal 35 has a substantially oval shape with a smooth outer contour 43. The outer contour 43 is composed of two mutually parallel longitudinal sides 48, 49, which are interconnected by respective semicircular arches 50, 51, whereby the oval basic shape of the seal 35 is closed. Also, designated 44 inner contour of the designed as a molded seal seal 32 is largely oval, with each of the longitudinal sides 48, 49 an inwardly projecting extension piece 52 is formed. This extension 52 faces a constriction 42, which is described by the Zentrierungskonturen 38, 39. Overall, the seal 35 seals off an inner space 45, which is partially within the first housing assembly 2 and partially within the second

Housing assembly 3 is located. A separate sealing of each housing assembly 2, 3 is therefore not required. The connection contour 38 of the first housing assembly 2 bears against the inside of the connection contour 39 of the second housing assembly 3. In this case, the connecting contour 38 is formed by a collar 54, which, as is evident in particular from FIG. 6, has a contact surface 53 on the front side, which contacts a ring 55 inserted in the second housing assembly 3.

The ring 55, which surrounds the ring gear 16, has a radially inwardly directed inner collar 56, through which an abutment edge 57 is formed, on which a 58 designated outer ring of the rolling bearing 20, that is spindle bearing rests. The spindle bearing 20 of the spindle drive 8 is thus through the first

Housing assembly 2 held in the second housing assembly 3. On its side facing away from the inner collar 56, the outer ring 58 rests against an angular ring 59, wherein a cylindrical jacket-shaped section of the angular ring 59 faces an annular circumferential shoulder 60 on the outer circumference of the ring 55. Features that relate to the assembly of the gear actuator 1, also go from Fig. 2. A first axis, which coincides with correctly assembled gear actuator 1 with the axis of rotation of the drive shaft 10 is designated by A1. With A2, a second axis is referred to, which is identical to the axis of rotation of the measuring shaft 1 1 in the ideal case. In fact, the second axis A2 is defined by the partially hollow-cylindrical section of the collar 54, which forms the centering contour 38 in FIG. 2 at the bottom. A cylinder descriptive centering surface FZ of the collar 54 extends over an angle of more than 180 ° about the second axis A2 and is also referred to as a centering circle.

When assembling the housing assemblies 2, 3, the centering surface FZ is first brought into contact with the Zentrierungskontur 39 on the second housing assembly 3, so that a centering is given. Thus, there remains only a single degree of freedom, namely a possible pivoting of the first

Housing assembly 2 about the second axis A2, if the second housing assembly 3 is considered fixed. This remaining degree of freedom is eliminated by aligning surfaces designated FA on the collar 54 in abutment against corresponding mating contours within the Zentrierungskontur 39 are brought. The alignment surfaces FA are located at that portion of the collar 54, which surrounds the drive shaft 10 approximately annular. Here, the two alignment surfaces FA of the constriction 42 are adjacent. The described assembly including an at least slight tilting of the first housing assembly 2 about the second axis A2 during assembly is possible because a running toothing is formed by the drive shaft 10 and the ring gear 16.

The interior 45 of the gear actuator 1 is by transmission oil of the means of

Gear actuator 1 operated gearbox lubricated. In the electronic unit 5 and in the motor 4 during operation of the gear actuator 1 resulting heat can be through the surface contact between the connecting sides 36, 37 through the second

Housing assembly 3 through flow into the housing of the actuated by means of the gear actuator 1 gearbox. The interior 45 of the gear actuator 1 merges into the interior of the gearbox. The first housing assembly 2 as a whole seals the second housing assembly 3 to the outside. The transmission actuator 1 is suitable for use in a hybrid-powered automobile as well as for use in a purely combustion engine driven vehicle.

Reference list transmission actuator

first housing assembly, drive unit second housing assembly, actuator mechanics motor, electric motor

electronics unit

shift shaft

actuator

spindle drive

cam gear

drive shaft

measuring shaft

roller bearing

external teeth

internal gearing

ring gear

Reduction gear

spindle

spindle nut

roller bearing

auxiliary shaft

magnet carrier

intermediate gear

Wähltopf

external teeth

internal gearing

connector

magnet

sensor

sensor 2 board 3 lids

4 adhesive seal 5 seal

6 connecting side 7 connecting side 8 centering contour 9 centering contour 0 screwing point 1 screwing point 2 constriction 3 outer contour

4 inner contour

5 interior

6 sealing surface 7 sealing surface 8 longitudinal side

9 long side

50 sheets

51 sheets

52 extension piece

53 contact surface

54 collar

55 ring

56 inner waistband

57 investment edge

58 outer ring

59 angle ring

60 paragraph

A1 axis

A2 axis

FA alignment surface FZ centering surface L linear direction U circumferential direction

Claims

claims

1 . Getnebeaktor (1) to perform switching and dialing with exactly one motor (4), with

a first housing assembly (2) in which the motor (4) is arranged,

- A second housing assembly (3), in which an actuator unit (7), which comprises a provided for performing switching operations spindle drive (8) and a provided for performing dialing cam mechanism (9) is arranged,

- A static, between the first housing assembly (2) and the second housing assembly (3) arranged seal (35) through which a common interior (45) of the two housing assemblies (2,3) is sealed, with two in the common interior ( 45) arranged shafts (10,1 1), namely as an input shaft of the actuator unit (7) provided drive shaft (10) and for detecting a state of a mechanical component of the actuator unit (7) provided measuring shaft (1 1), of the first

Housing assembly (2) to the second housing assembly (3) extend.

2. gear actuator (1) according to claim 1, characterized in that the seal (35) as both shafts (10,1 1) enclosing the molded seal is formed, which Zentrierungskonturen (38,39) on connecting sides (36,37) of the two housing assemblies (2,3) surrounds annular.

Third gear actuator (1) according to claim 2, characterized in that the Zentrierungskonturen (38,39) each describe a closed, elongated shape with a constriction (42).

4. gear actuator (1) according to claim 3, characterized in that the seal (35) has a smooth, oval outer contour (43) and in the region of the constriction (42) inwardly projecting inner contour (44).

5. Glowing reactor (1) according to one of claims 1 to 4, characterized in that the first housing assembly (2) for driving the motor (4) provided for electronic unit (5), which has a sensor (30) for detecting one by means of the measuring shaft (1 1) of the actuator unit (7) transmitted angle information is provided.

6. gear actuator (1) according to claim 5, characterized in that the electronic unit (5) additionally comprises a with the drive shaft (10) cooperating sensor (31), wherein both sensors (30,31) on the second housing assembly (3) remote from the motor (4) are arranged.

7. gear actuator (1) according to one of claims 1 to 6, characterized in that the drive shaft (10) and the measuring shaft (1 1) parallel to each other and orthogonal to a by means of the actuator unit (7) displaceable and

pivotable switching shaft (6) are arranged.

8. gear actuator (1) according to claim 7, characterized in that both shafts (10,1 1) allow a limited axial displacement between the housing assemblies (2,3), wherein the drive shaft (10) via a ring gear (16) having gear (17) cooperates with the spindle drive (8) and the measuring shaft (1 1) is designed in several parts.

9. gear actuator (1) according to one of claims 1 to 8, characterized in that a spindle nut (19) of the spindle drive (8) via an intermediate gear (23) coupled to the cam gear (9) and the measuring shaft (1 1) rotatably relative to the intermediate gear (23) is arranged.

10. Method for assembling a geared motor (1) having exactly one motor (4), namely an electric motor, comprising the following steps:

a first housing assembly (2) in which the motor (4) is arranged is provided,

a second housing assembly (3) is provided in which an actuator unit (7) suitable for carrying out switching operations and dialing operations is provided,

a seal (35) is inserted on a connection side (36, 37) of one of the two housing assemblies (2, 3), - The two housing assemblies (2,3) are inserted in the axial direction of the electric motor (4) to each other, wherein by the seal (35) and by Zentrierungskonturen (38,39) on the connecting sides (36,37) of the two housing assemblies (2,3 ) and by waves (10,1 1), which the

Connect housing assemblies (2,3) together, both in a single step, both a geometrically defined coupling and a torque transmitting and metrological connection between the two housing assemblies (2,3) produced and at the same time in both housing assemblies (2,3) extending interior ( 45) is sealed.