DE10316444A1 - Device for transmitting reduction motor gear change movements to control finger comprises segment in bearing carriage with teeth driven by reduction motor pinion and teeth transmitting segment rotation to control finger - Google Patents

Abstract

The device for transmitting gear change movement from reduction motors to a control finger (6) comprises a segment (2), pivoted on the finger, housed in a part of a bearing carriage (8). The segment has a first toothed side (4) driven by the reduction motor pinion (1) and on the other side a second set of teeth (5) which transmit the rotation of the segment to the control finger which can rotate around a control finger spindle (7) in the bearing carriage. The bearing carriage can be displaced by a selection driver in the direction of the pinion axis.

Description

The invention relates to a switching mechanism for performing Circuits in an automated transmission of a vehicle with at least a shift shaft for actuating and at least one for engaging a gear assigned shift rail.

In a switching mechanism known from automotive engineering, it can occur that more than one gear is engaged during a switching movement is, so that several shift rails and the respectively assigned Gears can be operated. In addition, the dialing movement should not be in Run neutral.

The invention has for its object a switching mechanism for Performing circuits on an automated transmission Propose vehicle in which a simultaneous double operation of Shift rails is prevented.

This object is achieved by a switching mechanism for Performing circuits on an automated transmission Vehicle with at least one control shaft for actuation and at least one solved for inserting a gear shift rail, in which the Shift shaft is coupled to the respective shift rail such that a simultaneous actuation of several shift rails is prevented.

The switching mechanism according to the invention can preferably be used to control the Engagement of the respective gears used in a dual clutch transmission become. However, this mechanism is also possible with others To use gear systems.

In one embodiment of the invention, the switching mechanism or engaging mechanism have a selector shaft, which for the execution of the Switching movement is rotated. The selector shaft can include a selection fork, which are along the axis of the selector shaft to carry out the selection movement emotional. Furthermore, at least one shift finger can be provided, which is characterized by the Shift shaft rotated and positioned axially through the selector fork. To insert of the respective aisle, at least one shift rail can be provided. According to the invention, at least one keyway or The like can be provided so that the shift finger does not have several at the same time Shift rails actuated.

In this way, a switching movement cannot be carried out if not the shift finger is only aligned with a shift rail. Preferably the Keyway arranged so that they are parallel to the teeth of the toothing the shift shaft is aligned, especially if the shift shaft in the neutral position.

In a locked position of the selector shaft, a tooth of the toothing becomes like this from the keyway, which holds the selector fork and thus the selector shaft is virtually blocked or blocked. The selection fork can only be moved if the keyway and teeth are in line, d. H. the keyway between two adjacent teeth of the toothing is arranged.

In an advantageous embodiment of the invention, the corners of the Teeth and / or the keyways z. B. bevels, curves or the like have which correspond to each other. In this way, the Function of the mechanism according to the invention can be further improved.

With the proposed solution, no additional parts need to be added become. All geometric changes to the existing parts can can be easily manufactured. For example, the parts can be stamped parts are produced, whereby the manufacturing process or the manufacture of the switching mechanism according to the invention is simplified.

The invention explained above can also be used in connection with all of them Switching / selecting actuators with a separate, concentric switching and Dialing mechanism can be used The present invention further relates to a method, a device and their use for operating a motor vehicle.

Referring to FIG. 1, a vehicle 1 'in manner known per se a drive unit 2', such as a motor or an internal combustion engine. Furthermore, a torque transmission system 3 'and a transmission 4 ' are arranged in the drive train of the vehicle 1 '. In this exemplary embodiment, the torque transmission system 3 'is arranged in the power flow between the engine and the transmission, with a drive torque of the engine via the torque transmission system 3 ' to the transmission 4 'and from the transmission 4 ' on the output side to an output shaft 5 'and to a downstream axis 6 '. and is transmitted to the wheels 6 a '.

The torque transmission system 3 'is a clutch, such as. B. designed as a friction clutch, multi-plate clutch, magnetic powder clutch or torque converter clutch, the clutch can be a self-adjusting or a wear-compensating clutch.

The torque transmission system 3 'can also be designed as a starting clutch and / or reversing set clutch for reversing the direction of rotation and / or a safety clutch with a selectively controllable, transferable torque. The torque transmission system 3 ′ can be a dry friction clutch or a wet-running friction clutch that runs, for example, in a fluid. It can also be a torque converter.

The torque transmission system 3 'has a drive side 7 ' and an output side 8 ', wherein a torque is transmitted from the drive side 7 ' to the drive side 8 'by z. B. the clutch disc 3 a 'by means of the pressure plate 3 b', the plate spring 3 c 'and the release bearing 3 e' and the flywheel 3 d 'is acted upon. For this application, the release lever 20 'by means of a mechanical release system, for. B. an actuator operated.

The torque transmission system 3 'is controlled by means of a control unit 13 ', such as a control unit, which can include the control electronics 13 a 'and the actuator 13 b'. In another advantageous embodiment, the actuator 13 b 'and the control electronics 13 a' can also be arranged in two different structural units, such as housings.

The control unit 13 ', the control and power electronics for controlling the drive motor 12' of the actuator 13 contained b '. As a result, it can advantageously be achieved, for example, that the system, as the only installation space, requires the installation space for the actuator 13 b ′ with electronics. The actuator 13 b 'consists of the drive motor 12 ', such as. B. an electric motor, the electric motor 12 'via a gear such. B. a worm gear or a spur gear or a crank gear or a threaded spindle gear acts on a master cylinder 11 '. This effect on the master cylinder 11 'can take place directly or via a linkage.

The movement of the output part of the actuator 13 b ', such as. B. the master cylinder piston 11 a ', is detected with a clutch travel sensor 14 ', which detects the position or position or the speed or the acceleration of a variable which is proportional to the position or engagement position or the speed or acceleration of the clutch. The master cylinder 11 'is via a pressure medium line 9 ', such as. B. hydraulic line, connected to the slave cylinder 10 '. The output element 10 a 'of the slave cylinder is with the disengaging means 20 ', for. B. a release lever, operatively connected so that a movement of the output part 10 a 'of the slave cylinder 10 ' causes the disengaging means 20 'is also moved or tilted to control the torque transmitted by the clutch 3 '.

The actuator 13 b 'for controlling the transmissible torque of the torque transmission system 3 ' can be actuated by pressure medium, ie it can have a pressure medium transmitter and slave cylinder. The pressure medium can be, for example, a hydraulic fluid or a pneumatic medium. The actuation of the pressure medium transmitter cylinder can take place by means of an electric motor, wherein the electric motor provided as the drive element 12 'can be controlled electronically. The drive member 12 'of the actuator 13 b' may be in addition to an electric motor drive element, a different, for example, pressure-actuated drive member. Magnetic actuators can also be used to adjust a position of an element.

In the case of a friction clutch, the transferable torque is controlled in that the friction linings of the clutch disc are pressed in a targeted manner between the flywheel 3 d 'and the pressure plate 3 b'. About the position of the disengagement means 20 ', such as. B. a release fork or a central release, the application of force to the pressure plate 3 b 'or the friction linings can be controlled in a targeted manner, the pressure plate 3 b' being moved between two end positions and being able to be set and fixed as desired. One end position corresponds to a fully engaged clutch position and the other end position corresponds to a fully disengaged clutch position. To control a transmissible torque, which is, for example, less than the engine torque currently present, a position of the pressure plate 3 b 'can be controlled, for example, which lies in an intermediate region between the two end positions. The clutch can be fixed in this position by means of the targeted activation of the disengaging means 20 '. However, it is also possible to control transmissible clutch torques that are defined above the engine torques currently pending. In such a case, the currently occurring engine torques can be transmitted, the torque irregularities in the drive train being damped and / or isolated in the form of, for example, torque peaks.

To control the torque transmission system 3 'sensors are also used, which at least temporarily monitor the relevant variables of the entire system and deliver the state variables, signals and measured values necessary for control, which are processed by the control unit, with a signal connection to other electrical units, such as for example engine electronics or electronics of an anti-lock braking system (ABS) or an anti-slip control (ASR) can be provided and can exist. For example, the sensors detect speeds such as wheel speeds, engine speeds, the position of the load lever, the throttle valve position, the gear position of the transmission, an intention to shift and other vehicle-specific parameters.

FIG. 1a shows that a throttle valve sensor 15 ', an engine speed sensor 16 ' and a speedometer sensor 17 'can be used and transmit measured values or information to the control unit 13 '. The electronics unit, such as. B. computer unit, the control electronics 13 a 'processes the system input variables and passes control signals to the actuator 13 b'.

The gear is as z. B. stage change gear designed, the gear ratios are changed by means of a shift lever 18 'or the transmission is operated or operated by means of this shift lever 18 '. Furthermore, at least one sensor 19 b 'is arranged on the shift lever 18 ' of the manual transmission, which detects the intention to shift and / or the gear position and forwards it to the control unit 13 '. The sensor 19 a 'is articulated on the transmission and detects the current gear position and / or an intention to shift. The intention to shift is detected using at least one of the two sensors 19 a ', 19 b' in that the sensor is a force sensor which detects the force acting on the shift lever 18 '. Furthermore, the sensor can also be designed as a displacement or position sensor, the control unit recognizing an intention to switch from the change in the position signal over time.

The control unit 13 'is at least temporarily in signal connection with all sensors and evaluates the sensor signals and system input variables in such a way that the control unit issues control or regulation commands to the at least one actuator 13 b' depending on the current operating point. The drive motor 12 'of the actuator 13 b', for. B. an electric motor receives from the control unit, which controls the clutch actuation, a manipulated variable as a function of measured values and / or system input variables and / or signals of the connected sensors. For this purpose, a control program is implemented as hardware and / or software in the control unit 13 ′, which evaluates the incoming signals and calculates or determines the output variables on the basis of comparisons and / or functions and / or characteristic maps.

The control unit 13 'has advantageously implemented a torque determination unit, a gear position determination unit, a slip determination unit and / or an operating state determination unit or is in signal connection with at least one of these units. These units can be implemented by control programs as hardware and / or as software, so that by means of the incoming sensor signals, the torque of the drive unit 2 'of the vehicle 1 ', the gear position of the transmission 4 and the slip which prevails in the area of the torque transmission system 3 'and the current operating state of the vehicle 1 'can be determined. The gear position determination unit uses the signals from sensors 19 a 'and 19 b' to determine the currently engaged gear. The sensors 19 a ', 19 b' are articulated on the shift lever and / or on internal gear means, such as a central shift shaft or shift rod, and detect them, for example the position and / or the speed of these components. Furthermore, a load lever sensor 31 'on the load lever 30 ', such as. B. on an accelerator pedal, which detects the load lever position. Another sensor 32 'can function as an idle switch, ie when the load lever 30 ' or accelerator pedal is actuated, this idle switch 32 'is switched on and when the load lever 30 ' is not actuated it is switched off, so that digital information can be used to identify whether the load lever 30 'is operated. The load lever sensor 31 'detects the degree of actuation of the load lever 30 '.

The Fig. 1a shows in addition to the load lever 30 'and in related sensors, a brake actuation element 40' for actuating the service brake or the parking brake, such. B. brake pedal, a hand brake lever or a hand or foot operated actuator of the parking brake. At least one sensor 41 'is arranged on the actuating element 40 ' and monitors its actuation. The sensor 41 'is, for example, a digital sensor, such as. B. designed as a switch, which detects that the actuating element 40 'is operated or not. With the sensor 41 'a signaling device, such as. B. a brake light, are in signal connection, which signals that the brake is applied. This can be done for both the service brake and the parking brake. However, the sensor 41 'can also be designed as an analog sensor, such a sensor, such as a potentiometer, determining the degree of actuation of the brake actuation element 41 '. This sensor can also be in signal connection with a signal device.

The following is an electronic unit for a geared motor, in particular an ASG geared motor, explained in more detail.

The object of the invention is to provide electronic units different structure so that they are attached to the engine without the modular system of today's geared motors needs to be changed.

The advantage of the invention is that the possibility of Attaching different electronics units to the same ASG Geared motor both partially intelligent geared motors and a concept for a low-cost clutch actuator are possible.

According to FIG. 2a, the electronic unit is plugged onto the existing motor connector according to the invention and pressed onto the ball bearing seat at the end of the pole pot in order to achieve sufficient strength, in particular against vibrations.

A socket and a plug are preferably used as plug contacts used as already on the geared motor or on the ASG wiring harness are used. The geared motor can thus be completely unchanged stay.

It is advantageously possible, for example, the entire one To arrange power electronics for a motor decentrally. Today's problems - such as the electromechanical compatibility EMC (strong Radiation through clocked control of the motors) - can in this way be solved.

A spring-mounted shift finger for actuating a valve piston for setting driving conditions is explained in more detail below in connection with FIGS . 3a to 5a.

The object of the invention is to provide an additional one in the vehicle Selector lever position without structural adjustment of the hydraulic control add.

A rotatably mounted shaft W is rotated into a predetermined angular position (gear positions P, R, N, D, S) according to FIGS . 3a to 5a, depending on the driving state selected. A shift finger F attached to this moves along and pushes a valve piston V back and forth, depending on the angular position of the shift finger F. However, the installation space is not sufficient to permit movement of the valve piston V from position "D" to position "S"; the piston V hits the housing before reaching the end position ( FIG. 5a).

While the rotary motion of the selector shaft is imperative to the To detect gear position, this is not the case with the valve piston. The adjacent valve positions D and S differ in terms of hydraulic function not from each other. So it is not necessary that transmit the rotary motion of the selector shaft from D in FIG. 5 to the valve piston becomes what would mean a larger axial installation space.

The present invention provides an additional selector lever position "S" the previous positions P, R, N, D without structural changes to components except for the control shaft.

According to the present invention, the shift finger F is in one Direction of rotation mounted resiliently, so that when adjusting position D in S the The shift finger springs in as soon as the valve piston V reaches its stop.

The achievable advantages:
less space required;
the control edges of the valve piston do not have to be adjusted for position S.

The embodiment of the invention described below in connection with FIG. 6a deals with the reference travel of a transmission actuator system when a gear is engaged.

With XSG gearboxes or automated manual gearboxes (e.g. ASG = automatic gearbox, PSG = parallel gearbox etc) It is often necessary for the applicant to have the actuators regular or irregular (for example in the event of an error or in the event of an assumed error) against certain To drive reference points. This approach to the reference points is used for Alignment of the sensors, especially incremental displacement sensors. Farther can this approaching the reference points "groping", a process at which is assumed that the exact position of the actuators within of the available movement space (usually H circuit diagram of a mechanical gearbox) is not known.

The reference points are i. d. R. placed so that they are within the neutral alley can be started, so that no gear has to be shifted or is switched. With conventional, automated manual transmissions with this touch i. d. Usually automatically neutral.

The object of the invention is to perform this comparison without laying it out the currently selected gear.

According to the invention it is proposed, on the one hand, that the shift jaws in the Execute shift rods so that the actuators when driving into the Neutral alley does not necessarily move the shift fork. So it can Neutral alley can be reached without the current gear being designed.

On the other hand, it is proposed to use the touch routine mentioned in combination with the mentioned gear mouth geometries regularly or irregularly (in suspected failure).

The main advantage is that with a gear engaged, that is for the driver, imperceptible referencing / adjustment of the transmission actuators or their measuring system can take place.

In Fig. 6a, three shift rods are shown schematically with their switching jaws. At the same time it is indicated in which alley the shift finger can move, regardless of whether a gear is shifted or not (N). If a reference run is initiated from this situation, the shift finger can move laterally towards N-Gasse and at the same time periodically grope up and down until resistance is felt. If this resistance disappears, so the shift finger can move upwards across the entire width of the neutral alley (and possibly to the opposite reference point, here below in the neutral alley), an adjustment can already be made in the selected direction. The final adjustment in the switching direction can e.g. B. in a specially provided recess, shown in Fig. 6a above. After homing, the shift finger returns to its position before homing. If the starting point is unknown, suitable logic must be used to determine the switching direction in which the initial movement should take place.

Locking the individual shift rods is helpful or necessary to to keep the last engaged gear engaged even when the Shift finger does not ensure that the shift rod is locked.

This configuration is particularly in the case of automated manual transmissions ASG and applicable for parallel gearboxes PSG with interlock.

Switching / dialing decoupling is then carried out Crown gear toothing explained.

According to the object of the invention, switching / selection kinematics are to be designed by using a crown gear toothing space and costs optimized.

A recurring task is independence between Shift and select movement, which is the case with most transmissions a central control shaft can be merged. This can be done using the so-called crown gear teeth can be achieved. In the specific case it works the development of an ASG alternative whose actuators are made up of several complex components, especially from tightly tolerated sheet metal parts and one expensive shift finger segment. According to the basic Understanding this interlocking and its different possible variants The main problem is the concrete transfer of the Gear geometry in the CAD system.

The following gears are known.

General involute gears

The variety of involute gears can be divided into two large groups organize. With one ("pitch constant gearing") the pitch remains Constant across the face width (e.g. standard spur gear teeth). In the other ("pitch variable gears") it changes (e.g. Bevel gears).

In common practice, spur gear teeth are used for parallel axes and bevel gear teeth for intersecting axes. For crossed axes, both pitch-constant gears (worms, worm gears, helical gears) and variable-pitch gears (e.g. bevel gears) are used. However, not only for parallel, but also for intersecting and intersecting axes, pitch-constant gears can be used. They have the advantages of spur gear toothing in terms of production and axle position tolerance and can transmit high torques. The different axis positions are determined by two sizes, namely by the axis angle Σ and the axis offset a, the shortest distance between two crossing axes (see Fig. 7a).

Crown gears

A crown gear is the special case of a conical gear when the Cone angle or the axis angle Σ is 90 ° during generation.

Special features are:
The teeth are on the face of the wheel body perpendicular to the wheel axis. They have the same module, but different pressure angles along the tooth width.
The toothing forms the transition from the conical external toothing to the conical internal toothing in the standardized gear system.

In Fig. 8a mean: Line 1 : no axial misalignment, straight toothing → tooth is symmetrical and not undercut, line 2 : no axial misalignment, helical toothing → undercut on the small radius, line 3 : axial misalignment, straight toothing → tooth undercut on the small radius, line 4 : With the right combination of axis offset and helix angle, left and right flanks can become almost symmetrical.

Possible use of the crown gear teeth on the ASG (automatic transmission)

With the ASG, a double crown gear toothing could be used to decouple the required movements of the shift / select kinematics from the geared motors to the shift finger. The crucial link would therefore be a sub-segment of a crown gear, which has the pinion of a switching motor as the drive. A lever could act as an output, the z. B. as ≍ 1: 1 ratio on one side (i.e. in connection with the crown gear) one or more ordinary involute teeth and on the other side (in engagement with the shift mouthpiece) has the shape of the original shift finger of the transmission. Fig. 9 shows a possible arrangement of the kinematics as ASG application.

During the switching movement, in this case the rotation about the wheel shaft (6), first the motor pinion (8) transmits its rotational movement about the first crown of teeth (3) on the Kroneneradsegment (1), which is supported by its axis (6) in the bearing carriage (5) , Via the second crown gear toothing ( 4 ) of the segment, the movement is then transferred to the shift finger ( 2 ), which is mounted on the shift finger axis ( 7 ) (corresponds to the ZSW) and thus also in the bearing slide ( 5 ). The selection movement takes place along the shift finger axis ( 7 ). The entire arrangement (without the shift motor pinion) has to be shifted via a kinematics which is only shown as an example in FIG. 10. This kinematics could e.g. B. as here by a further, with the bearing carriage ( 5 ) connected, toothing ( 9 ). The intervention (forces, translation) of the stationary geared motor pinion with the (selected) shifted crown gear segment is not affected by this shift. Switching and selection movement are thus completely decoupled from one another by the sliding between pinion and segment. The secondary (= shift finger) toothing ( 4 ) can also be positioned in relation to the crown gear axis ( 6 ) of the primary toothing ( 3 ), but not in any angular position (shift finger axis ( 7 ) must be parallel to the shift motor pinion axis). For better understanding, the same kinematics is shown below (see FIG. 10), but with the geared motors connected and applied to the gearbox flange.

The advantages are:
Another variant of the complete decoupling of switching and dialing (see above).
Independence between the axial mounting of the shift motor or SM pinion for its abrasion (segment), ie tolerance-insensitive dimension between the screwing surface of the shift motor and the rest of the kinematics / shift finger.
No special gear cutting machines are necessary, the same machines as for spur gears.
Gaining degrees of freedom in the arrangement of the ASG geared motors. This advantageously saves space inside and outside the actuator housing.

Suitable combination of the two theoretically independent Crown toothing enables variable achievement of the desired Overall gear.

problems:
The additional gear stage increases the number of components.
The bearing slide is a relatively complex component due to the different bearings, the connection of the dialing kinematics and the necessary sliding surfaces on which it has to be moved and supported in the housing.
A complicated selection of the secondary toothing is necessary because of the combination of the toothing geometry, the translation and the comparatively small proportion of the usable tooth width with a crown gear toothing (explanation see below).
The degree of freedom increases with the complexity of the toothing (helical toothing / axis offset).
Due to the "flattening" of the crown gear flanks in the direction of the segment outside, large axial forces act on the segment bearing and on the entire bearing slide.

Representation of the geometry in Pro / Engineer

Of the various options of crown gear toothing shown in FIG. 8a, only the first one, that is to say without axial misalignment and with straight toothing, has so far been examined more closely and successfully modeled in Pro / E. Small ambiguities, e.g. B. with regard to the translation of the "secondary crown teeth" still have to be cleared, which may result from the parameter control of the program. The decisive parameters are controlled by a so-called layout, so that changes in geometry and translations can be made centrally for the entire assembly. This layout control can be developed further and thus be applied to even more construction elements of the assembly. However, it is not possible to ensure that any changes can be made, which means that e.g. B. the component can no longer be regenerated in the event of major changes.

The formation of the flanks can be thought of as winding an ordinary rack around an axis perpendicular to the gear plane. On a cross section perpendicular to the tooth width, the flanks thus represent two intersecting straight lines as in the case of a toothed rack. As can be seen in FIGS. 8a and 13, the straight lines become steeper towards the segment axis of rotation and their intersection moves upwards. They flatten outwards and the intersection moves downwards (towards the tooth base).

Modeling approach

The tooth gap is modeled here for the crown gear so that it can later be cut out of the segment. What is referred to below as the tooth tip is actually the tooth tip of the partner (pinion) and corresponds, so to speak, to the "tooth gap tip" of the crown gear. However, this has no effect on the understanding of the modeling. First, the straight line is defined by two points. Point 1 is the tooth tip, i.e. the intersection of the two straight lines belonging together in a cross section. The contact point of the flank straight line with the corresponding (here constant) profile of the counter flank (pinion) was selected as the second point. Seen over the entire tooth width, these two point sets result in two curves, a tooth tip curve z (R) and a contact curve b (R). R embodies the distance of the respective tooth cross-section from the crown gear axis of rotation and, in deriving the functions, replaces the angle α previously introduced as a running variable along the tooth width. The following graph of FIG. 11 shows the input quantities of the pinion and the basis for the required equations.

Explanation of the designations of FIG. 11 features

z (R): sequence of all tooth tip points
b (R): sequence of all touch points
t (R): sequence of all tangent points (the normal to the base circle)
(all functions of R go along the tooth width) Input variables rb from the pinion : base circle radius
Ψ: Angle between tooth center plane and involute starting point Parameter α: Run variable
ZP: tooth tip
BP: touch point
WP: pitch point
TP: tangent point
Δ: slope of the rolling line ~ translation i = tan (Δ) = R / r derivation of the equations Note: The following equations relate to a Cartesian coordinate system which is shown later in FIG . 1. Tooth tip curve The curve z (R) lies in the tooth center plane => z = 0
x corresponds to the run variable R
y thus corresponds directly to the function z (R) and the distance from the pinion axis.

In the Pro / E equation editor it looks like this, whereby another run variable t has to be introduced in order to delimit the definition and here in this case also the functional area:
/ * Enter parametric equation for Cartesian coordinate system
/ * depending on t (value between 0 and 1) for x, y and z.
/ * Example: For a circle in the XY plane with the center at the origin
/ * and a radius of 4 is the parametric equation:
/ * x = 4.cos (t.360)
/ * y = 4.sin (t.360)
/ * z = 0
/ * - - - - - - - - - - - -
RB = RB1
x = RMAX1K-t. (RMAX1K-RMIN1K)
R = x
y = RB. (PS / 1 + pi / 180.acos (RB / (R./1))) / sin (acos (RB / (R./1)))
z = 0

The other previously unknown variables (RB1, PSI1, I1) have their origins in the so-called layout of the gear assembly and had to be introduced so that parameters used multiple times can be used globally in all components. Indices 1 and 2 refer to the first and second crown gear teeth. The corrected definition limits (RMAX1, RMAX1K, RMIN1K) prevent the program from having no calculation problems in areas in which the curve becomes too steep and from not intersecting with the contact point curve described below. The conversion factors pi and 180 ° are required by Pro / E because it cannot calculate in radians.

Berührpunktskurve

The curve b (R) is not in one plane, which is why all coordinates are required.
x again corresponds to the run variable R


In Pro / E / * enter parametric equation for Cartesian coordinate system
/ * depending on t (value between 0 and 1) for x, y and z.
/ * Example: For a circle in the XY plane with the center at the origin
/ * and a radius of 4 is the parametric equation:
/ * x = 4.cos (t.380)
/ * y = 4.sin (t.360)
/ * z = 0
/ * - - - - - - - - - - - -
RB = RB1 x = RMAX1K-t. (RMAX1K-RMIN1K) R = x er = acos (RB / R / I1) y = RB. (Cos (er) + (PSI1 + pi / 180.er) .sin (er ))
z = RB. (- sin (er) + (PSI1 + pi / 180.er) .cos (er))

The contact point curve must then still be mirrored at the tooth center plane to get the opposite edge.

These curves then look like shown in FIG. 12 in Pro / E.

FIG. 12 shows the curves mathematically described above with reference to the "CS orientation" coordinate system. The lower guide curve has no significance in terms of tooth geometry and is only required to create the surface of the tooth flanks. For the modeling, all curves with respect to the KS must have the same extension in the x direction. Fig. 13 shows further intermediate steps of the toothing modeling. FIG. 13a represents the first surface is formed by a variable-drawn section. Fig. 13b shows the "base surface" and the counter-flank, both of which are already merged with the first edge. In Fig. 13c the patterned collecting areas have already been cut out of the material. Further details and the second crown gear toothing can be found in the current model.

In the following, the layout is shown, from which the various parameters can be changed and then transferred to the assembly (skeleton part, components, installation conditions).

Formulas are anchored in the layout relationships, which use the inputs to calculate further variables, which in turn are then incorporated directly into the construction elements of all assembly components (part, skeleton part, installation conditions). Here is an example of the relationships of the layout:
I2 = I / I1; (Translation)
WKRONRAD = WSF / I2; (Angle of rotation)
WRITZEL = WKRONRAD / I1
RMAX1 = 50; (Domain)
SOLVE
PSI1 = tan (acos (RB1 / RMAX1 / I1)) - pi / 180.acos (RB1 / RMAX1 / I1)
FOR RMAX1
RMAX2 = 20
SOLVE
PSI2 = tan (acos (RB2 / RMAX2 / I2)) - pi / 180.acos (RB2 / RMAX2 / I2)
FOR RMAX2
RMIN1 = 45
solve
45.sin (acos (RB1 / RMIN1 / I1)) = PSI1 + pi / 180.acos (RB1 / RMIN1 / I1)
for RMIN1
RMIN2 = 25
solve
45.sin (acos (RB2 / RMIN2 / I2)) = PSI2 + pi / 180.acos (RB2 / RMIN2 / I2)
for RMIN2
RMAX1K = RMAX1.0.995; (Corrected limits)
RMAX2K = RMAX2.0.995
RMIN1K = RMIN1.1.005
RMIN2K = RMIN2.1.08

conclusion

Crown gear teeth have been successfully used in the Pro / Engineer CAD system modeled and could minimize the issues raised (Stability, layout, changeability, translation) can still be optimized.

A two-motor actuator system according to the invention for an ASG Gearbox described with active interlock.

Previous ASG transmissions with Active Interlock had three electric motors.

The object of the invention is to reduce the cost of entire system. This is solved by the fact that The clutch is actuated without the selector actuator.

The inventive idea is that the selection force is transmitted from the selection actuator by means of a special mechanism with an additional circuit diagram according to FIG. 14 and additional fingers for clutch actuation. The other FIGS. 15 to 22 show the switching sequence for the 2-3 circuit.

New elements: The sleeve 1 with the circuit diagram for the power transfer from the selector actuator to the coupling is provided with a catch. If the additional finger 2 is out of neutral in the alley, the clutch can be operated with the selector actuator.

The sleeve 1 does not rotate with the selector shaft. The clutch opens when the additional finger 2 pushes it in the left direction ( FIG. 14).

Figs. 15 to 22 show the example of the circuit 2-3.

There now becomes a two-motor actuator for ASG transmissions according to the invention explained without active interlock.

Previous ASG gearboxes without Active Interlock had three electric motors.

The invention relates to a solution in which the clutch actuation by the selector actuator is used to reduce the cost of the entire system.

The inventive idea is that the selection force is transmitted from the selection actuator by means of a special mechanism with an additional circuit diagram according to FIG. 23 and additional fingers for the clutch actuation. With such a mechanism, the path when closing the clutch is the same for all alleys. The coupling must have the equilibrium point in the "open" position ( Fig. 24). The shift rails have narrow drivers to allow the shift finger to move laterally. The other FIGS. 25 to 29 show the switching sequence for the 2-3 circuit. With the wide lanes and smaller clutch travel, clutch actuation is also possible within the lane.

New elements are: Sleeve 1 with the circuit diagram for the power transfer from the selector actuator to the clutch, as shown in FIG. 23, provided with a detent. If the additional finger 2 is in the alley out of neutral, you can operate the clutch with the selector actuator; Additional finger 2 .

The sleeve 1 does not rotate with the selector shaft. The clutch closes when the additional finger 2 pushes it towards the left.

The coupling must have the equilibrium point at the "open" position ( Fig. 24) in order to be kept open during the selection movement, because in the neutral position it is not possible to transmit power from the additional finger to the sleeve.

The development of a gear actuator according to the invention is described below explained only one drive.

According to the task, there should be the possibility of any To be able to switch gear order.

function Description

A shaft ( 2 ) with a corresponding internal thread is screwed onto the threaded rod ( 1 ), FIG. 30, which shows a top view of the gear actuator. The shift finger ( 3 ) is firmly connected to this shaft. The shift finger is guided in the shift template ( 4 ). The locking wedges ( 5 ) are rotatably connected to the switching template. Compression springs ( 6 ) behind the locking wedges push them out of the recesses. In order to ensure the function of the gear actuator, the friction between the threaded rod ( 1 ) and the shaft ( 2 ) must be so great that when the shift finger can move freely, the shaft adheres to the threaded rod. It is advantageous that the inertia of the shaft and the shift finger is as low as possible. Fig. 31 shows a perspective view of the gear actuator.

Shift into first gear

If the shift finger is to be switched from the starting position ( Fig. 32) to 1st gear, the threaded rod ( 1 ) is turned to the right. The shift finger can initially move freely until it hits the locking wedge. If the shift finger is turned further, the locking wedge is rotated around its pivot point and pressed into the lockout of the shift template against the spring force. After the shift finger has passed the locking wedge, it is pushed out again by the spring. After the shift finger hits the right wall of the shift gate, the shaft ( 2 ) can no longer turn with the shift finger and begins to move along the right edge until the gear is engaged.

1 → 2 circuit ( Fig. 33)

When changing from 1 to 2 gear, the threaded rod turns to the left rotated, causing the shift finger to go first along the straight line and then moved along the sloping edge, thereby placing the locking wedge in his Recess presses. Then the threaded rod is turned clockwise until the locking wedge is pressed out into its starting position by the spring force becomes. The threaded rod is then turned to the left again, whereby the Shift finger bumps against the disengaged locking wedge and towards 2nd gear can move.

In Fig. 34 a second variant of Schaltaktorik is illustrated. However, it is to be understood as a settlement. In the initial form, the switching template is wrapped around a radius that is larger than the radius of the shaft with an internal thread.

• - Der Weg in der Wählrichtung beim Gangwechsel ist immer gleich und ist unabhängig von der Startposition des Schaltfingers.
• - Die Sperrkeile werden ersetzt durch zwei Kämme, die über die Stifte und Langlöcher geführt und über eine Feder in die Ausgangsposition gedrückt werden. Diese Lösung hat den Vorteil, dass sie einfacher zu realisieren ist.
• - Der Schaltfinger kann wesentlich kürzer ausgeführt werden als in der ersten Variante, wodurch seine Massenträgheit gering gehalten werden kann.

The advantages over the first variant are:

• - The path in the selection direction when changing gears is always the same and is independent of the starting position of the shift finger.
• - The locking wedges are replaced by two combs, which are guided over the pins and slots and pressed into the starting position by a spring. The advantage of this solution is that it is easier to implement.
• - The shift finger can be made much shorter than in the first variant, whereby its inertia can be kept low.

This invention is applicable to all types of transmissions with an H circuit diagram.

An integration of an additional bearing point for the shift rails into the transmission actuator according to the invention will now be explained in connection with FIG. 35.

The shift rails, especially those made of sheet metal, have theirs Storage at both ends. This results in larger, longer gears a relatively flexible solution that should be improved according to the task.

To solve this, an additional bearing point is inserted in the middle.

The development particularly concerns a transmission actuator for a PSG transmission with rear-wheel drive.

A support option is provided in the housing of the add-on gear actuator integrated for the switching rail. In the technical casting design cantilever arms as upper and lower guide for the shift fork package that protrude into the gearbox in such a way that they support the Ensure package of shift rails. It may be sensible at the ends of the cantilever arms on the contact surface to the Clip the shift rails onto a plastic shoe.

The complete transmission actuator is shown in FIG. 35. It contains the cantilever arms at four possible locations. For a technical implementation, it can also be discussed whether four cantilever arms are required or whether the use of two is sufficient.

Brushless motors are also used for this actuator.

The invention is applicable to all systems of the XSG family, in particular in the Arrangement of a rear-wheel drive vehicle, applicable.

A motor concept in which the fixed bearing is located on the B side of the motor and not, as is customarily on the A side (shaft output), will now be described below in connection with FIGS. 36 to 42.

This makes it possible to move the focus further towards the Screw surface to move, which causes the behavior with regard to Vibration loads are improved.

The stator and its coil wires are made together with the one before sprayed plug electrically connected. Already on the plug The sensor board and the evaluation electronics are integrated and contacted. However, this does not have to be placed on a circuit board with the sensor, but can lie on the route between sensor and control electronics.

The connector, the stator, the circuit board and the Bearing, which later forms the fixed bearing, into a firm bond shed.

It arises after the shaft is inserted and form-fitting connection the same with the bearing in the connector structure, a plug-in unit, which without Motor housing can be checked (simple device).

With this unit, an additional motor housing is no longer necessary. I.e. the unit can be in an electric motor housing or z. B. in a Gearbox are inserted.

When inserting the motor unit into a motor housing, the cover can be removed Undercuts or other connection options on the motor housing being held. This is a completely closed motor unit emerged, which can be checked like a normal engine. his the motor will reach a final merger if it joins the Lag screws is screwed to the mounting surface.

After inserting the motor into a gearbox, the Connection by tightening the cover with the lag screws realized. The lag screws allow it to be somewhat persistent To allow pre-tensioning over the longitudinal expansion of the screw.

The radial outlet of the plug enables a lateral connection of the Plug. Through this the plug can be turned by turning the motor or by a different position of the notch in the motor housing in any Position.

Due to the short design of the motor and the angled connector, it is too possible to route the cable harness in the direction of the mounting surface, so that there the cable is connected to the housing by the shortest route and also here behavior with regard to vibration loads is improved again.

In order to better understand the principle, the relationship between the Parts and their order are described.

The invention makes it possible to build an engine in which the Place the center of gravity as close as possible to the screw-on surface. Advantageously, the stator block can be complete vibration-insensitive and compact unit can be designed.

1. Punched grid and sensor board

According to the Fig. 36, the lead frame is fixed with a preform of a type A. Pins on the molding take up the sensor board and are thermoformed to secure the board. The board can be picked up via the lead frame. The sensor board is connected to the lead frame in an electrically conductive manner by means of axial channels via the supply of heat. The lead frame can thus be separated and the sensor board checked. The molding takes on the lead frame and the sensor board and contains storage areas for fixed bearings, which can then be used to assign the connector to be molded later.

In Type B, as in Type A, the molded part takes the lead frame and die Sensor board on. However, it does not contain any inventory.

2. Connector

Fig. 37: Injection molding of the plug onto the molded part. Contains all functions of the connector and also accommodates the molded part with the lead frame and sensor board. Includes radial contours for later inclusion in the housing and axial passages as above.

In type A, the connector is only designed with the outer ring. With type B is the plug with outer and inner ring, which the Storage areas defined. (Bearing surfaces and outer cylinder surfaces are with the connector. Spraying channels in the inner ring be led).

The lead frame can be separated after spraying the connector. The The sensor board can be contacted after disconnecting the plug. To the Plugs can possibly be molded onto the housing and cover become. When arranging the seal, make sure that it is completely defined on the body of the connector the sealing surfaces to a Avoid infiltration between connector and molded part. The Maximum temperatures of the sensor board and their connections during spraying have to be considered.

3. Stator block

Referring to FIG. 38, be placed plug, bearings and bearing fixation means of a device stator. The coil strands and the sensor board are now electrically connected to the connector pins. The axial passages offer the appropriate space for this. The device enables the sensor system to be aligned with the coils. This is done with a magnet defined for the stator. An optimized commutation signal and thus better motor utilization is achieved. To align, the stator coils and sensors could possibly also be contacted by the plug and the alignment could be aligned or achieved via the fields generated. A mechanical assignment from coil to sensor via the device is possible. The bearing and then its fixation is inserted into the plug. These are to be kept axially (possibly under pretension).

4. Potting the stator block

Referring to FIG. 39, the coil body is cast together with the plug and the loaded bearings as well as the fixing thereof by a suitable cast mass to form a unit. Here, the device includes the complete sealing of the geometries, such as. B. stator axially and radially to fix the cylindrical shape and the windings. The casting compound also includes the sensor board with its electronic components. The bearing is held between the molded part (or connector) and the bearing fixation; these and the other parts have undercuts to ensure a positive fit. Attention must be paid to the material of the casting compound and its compatibility with the other materials and surfaces. z. B. in the case of thermosets: on the outgassing and dissolving of the circuit board, sealants and materials, in the case of thermoplastics: on the temperature compatibility of the individual components and, in the case of plastics: generally on the distortion and shrinkage behavior.

5. Insert the rotor assembly

According to FIG. 40, the shaft assembly is mounted with the bearing for the floating bearing, spacer ring, magnet package and control magnets aligned with it. The shaft is used in a fixed bearing and is permanently pressed.

The unit can be tested in one device without a motor housing.

6. Installation in the motor housing

Referring to FIG. 41, the unit can be inserted into an associated motor housing for the construction of a drive pinion or a suitable Anschraubgeometrie.

When the stator is pressed in, the force passes through the stator block.

The shaft seal, the flange seal and the Seal between stator block and housing attached z. B. vulcanized become.

7. Fasten the motor

FIG. 42 shows the drive pinion with Anschraubgeometrie at different levels. The cover geometry engages behind the motor housing or is clamped onto it.

An embodiment of the present invention shown in FIG. 43 is explained below, in which the selected movement is carried out in an automatic transmission system (ASG) using an actuating device with a voice coil.

The movement of the dialing mechanism of some ASG systems is linear Low load movement (about 65 N) with a path of about 25 mm. The task The present invention now consists of a device for execution to create this linear movement. The use of a voice coil is advantageous here because it means smaller and lighter actuators than those on the Available in the market.

An actuator with a voice coil is a device that delivers a constant force over its range of motion. The generated force (Lorentz force) is proportional to the operating current supplied to coils in one magnetic field is applied. Actuators with voice coils were originally developed for speakers.

In the context of this invention, a voice coil is used for the first time in an actuator used for a linear movement that has a cylindrical shape. The Actuator with voice coil becomes concentric with the central control shaft arranged to form a direct drive line in which the shift finger with a linear movement to the lane position for switching.

• - Verwenden der elektrischen Charakteristiken des Aktuators mit Schwingspule als Mittel zur Bestimmung ihrer Position.
• - Verwenden sich gegenüberliegender Federn zum Ausgleich der lastfreien Position in der Mitte der Bewegung des Aktuators und Festlegen der entgegen der Federkraft angelegten Spannung zur Bestimmung des Betrages der Bewegung aus der zentralen Position.
• - Verwenden von Rastierungsfedern in dem Mechanismus zur Anzeige der Getriebepositionen und Überwachen der Kennlinie des Spannungsprofils zur Bestimmung der Position der Schaltwelle.
• - Absolutes Bestimmen der Schaltposition durch Verwenden eines Positionssensors.

The position of the shift shaft can be determined by a variety of means. For example, this can be done by the following means:

• - Use the electrical characteristics of the voice coil actuator as a means of determining their position.
• - Use opposite springs to compensate for the no-load position in the middle of the movement of the actuator and to set the counter-spring tension to determine the amount of movement from the central position.
• - Using detent springs in the mechanism for displaying the gear positions and monitoring the characteristic of the voltage profile to determine the position of the selector shaft.
• - Absolute determination of the switching position by using a position sensor.

It is not intended to use a voice coil actuator for the switching movement to use and the size and weight of the actuator with voice coil, that would be required for the larger forces would prohibit this.

A method according to the invention for supporting shift rails in an automatic transmission is explained below in connection with FIG. 44.

The shift rails should be supported in a gearbox can be achieved. This can reduce shifting of the shift rails caused by vibrations and shocks. advantageously, is the structure of the gearbox by the extra or own support not more difficult.

It is an inventive and new, advantageous structure for control the engagement of the gears in a gearbox with a double clutch created. There is also an inventive method for producing a own support of the shift rails indicated that this actuator used. The actuator for moving or switching the gears is used after assembling the gearbox. The assembly the gearbox is not made difficult by its own support or impaired.

The actuator for shifting the gearwheels or the shift actuator is attached to the side of the transmission housing next to the shift rails. The supports for the shift rails are formed in the actuator. The Fig. 44 shows a cross section of the gear housing by the actuator for shifting the gears.

In the following, an alley mechanism for automatic transmissions is explained in more detail in connection with FIGS. 45 and 46.

This mechanism according to the invention is intended to prevent more than one gear is engaged during a switching movement. In addition, the Dialing movements are not carried out in neutral. Finally, the gear Switch mechanism in the correct positions so that the Can engage gears.

The inventive and new arrangement was specifically for controlling the Engagement of the gears created in a dual clutch transmission. It will also a method for producing a gear-alley mechanism for created this arrangement without using your own components is required.

• 1. eine Schaltwelle 1, die zur Ausführung der Schaltbewegung gedreht wird,
• 2. eine Wählgabel 2, die sich entlang der Achse der Schaltwelle zur Ausführung der Wählbewegung bewegt,
• 3. einen oder mehrere Schaltfinger 3, die durch die Schaltwelle gedreht und axial durch die Wählgabel positioniert werden, und
• 4. wenigstens eine Schaltgabelschiene 4.

The gear mechanism engagement mechanism includes the following components:

• 1. a selector shaft 1 , which is rotated to carry out the switching movement,
• 2. a selection fork 2 , which moves along the axis of the selector shaft to carry out the selection movement,
• 3. one or more shift fingers 3 which are rotated by the shift shaft and positioned axially by the selector fork, and
• 4. at least one shift fork rail 4 .

These shafts are in the gearbox on the forks that engage the gearwheels attached.

As stated above, a shift movement should not be performed unless the shift finger is aligned with a single shift rail. If the shift lever is not aligned with a shift rail, one of the teeth 5 on the shift shaft is aligned with the keyway 6 in the selection fork. This prevents the selector shaft from rotating. This situation is shown in FIGS. 47a, b and 49a, b.

The keyway is positioned so that it is only aligned with the teeth when the selector shaft is in the neutral position. The selection fork can only be moved if the keyway and the teeth are in line. This prevents unwanted dialing movements. This situation is shown in FIGS. 48a, b.

If the corners of the teeth and / or the keyways with bevels or The mechanism guides the selector shaft and the curves Selector fork also in the correct positions.

With the proposed solution, no additional parts need to be added become. All geometric changes to the existing parts can can be easily manufactured. For example, the parts can be stamped parts getting produced.

Referring to FIGS. 47a, b and 49a, b of the mechanism of the sliding shaft can be manufactured with teeth on one side. Referring to FIGS. 50a, b it is also conceivable, however, to provide teeth on both sides of the sliding shaft.

The invention explained above can also be used in connection with all of them (Switching / selection) actuators with a separate, concentric switching and selection mechanism are used in which teeth mesh.

A construction according to the invention of an elastic device for gearwheel connection, which uses a C-shaped metal ring, is explained below in connection with FIGS. 51 to 55.

If the gear shifting is done by an electric motor, high switching speeds or forces can cause the Synchronization rings are damaged.

This problem can be solved by mounting a type of elastic element in a position between the electric motor and the sleeve with the shift finger. The shape of the elastic element, hereinafter referred to as the elastic collar, can be different. A preferred embodiment is shown in FIG. 51.

The elastic collar is said to be prestressed and is assembled together with an outer sleeve with a shift finger and an inner sleeve which is connected to the electric motor / gear system. The elastic collar can consist of one or more elements, which according to FIG. 52 need not be arranged in the same direction.

When the electric motor starts rotating, which is the first part of the Switching stroke corresponds, the outer sleeve follows the inner sleeve because of Preloading the elastic collar up to a defined torque. When the synchronization starts, the resistance / that increases Torque and exceeds the preload. This causes the outer sleeve with the shift finger and the inner sleeve towards each other start turning. If the resistance rises further, the bend elastic collar to the point where its two ends meet. This point corresponds to the end stop of the elasticity and as long as that Torque is above this point, the outer sleeve follows the inner one Sleeve.

Fig. 53 shows a situation in which the inner sleeve is rotated counterclockwise (e.g. in first, third and fifth gear) with a torque above the elastic level. FIG. 53 is similar to FIG. 54, except that the direction of rotation is clockwise (for example for the second and fourth gear).

An example of the rotation and torque values is shown in FIG. 55.

Further advantages and advantageous configurations result from the Subclaims and the drawings described below. Show it:

FIG. 1 is a three dimensional view of a possible embodiment of a switching mechanism of the invention;

FIG. 2 shows an exploded view according to FIG. 1;

Fig. 3 is a partial side view of a locked position of the selector fork;

FIG. 4 shows a sectional view along the line AA according to FIG. 3;

Figure 5 is a partial side view of an unlocked position of the selector fork.

FIG. 6 shows a sectional view along the line BB according to FIG. 5;

Fig. 7 is a partial side view of a locked position of the selector fork with double-sided teeth; and

Fig. 8 is a sectional view taken along line CC in FIG. 7.

In connection with FIGS. 1 and 2, a shift mechanism according to the invention for an automatic transmission is explained in more detail.

The switching mechanism has a switching shaft 1 , which is rotated to carry out the switching movement. The selector shaft 1 has a selector fork 2 , which moves along the axis of the selector shaft 1 to carry out the selection movement. Furthermore, at least one shift finger 3 is provided, which is rotated by the shift shaft 1 and positioned axially by the selection fork 2 . To engage the respective gear, a shift rail 4 assigned to a desired gear can be actuated by the shift finger 3 .

According to the invention it is provided that a switching movement should not be carried out if the switching finger 3 is assigned to a plurality of switching rails 4 . This is achieved by a keyway 6 on the selection fork 2 of the selector shaft 1 . If the shift finger 3 is not aligned with a shift rail 4 , one of the teeth 5 of the toothing on the shift shaft 1 is aligned with the keyway 6 in the selection fork 2 . This prevents the selector shaft 1 from being rotated.

A locked position of the selector shaft 1 or the selection fork 2 is indicated in FIGS . 3 and 4 and in FIGS. 7 and 8, respectively, with FIGS. 4 and 8 each showing sectional views of FIGS. 3 and 7. The representation in FIGS. 3 and 7 differ in that in FIG. 7 there is a toothing on both sides.

The position at which the shift shaft can perform a shift is indicated in FIG. 5. FIG. 6 shows a sectional view of FIG. 5.

The keyway 6 is positioned such that it is only aligned with the teeth 5 when the selector shaft 1 is in the neutral position. The selection fork 2 can only be moved if the keyway 6 and the teeth are aligned in a line parallel to one another, as is indicated in FIG. 5. This prevents unwanted dialing movements.

The claims filed with the application are Proposed wording without prejudice for obtaining further patent protection. The The applicant reserves the right to add more, so far only in the description and / or Drawings combinations of features disclosed.

Relationships used in subclaims point to the others Training the subject of the main claim by the features of respective subclaim; they are not a waiver of attainment an independent, objective protection for the combinations of features to understand the related subclaims.

Since the subjects of the subclaims with regard to the prior art reserves the right to make its own and independent inventions on the priority day Applicant before becoming the subject of independent claims or To make divisional declarations. You can continue to work independently Inventions contain one of the objects of the previous Have independent claims independent design.

The exemplary embodiments are not intended to limit the invention understand. Rather, there are numerous within the scope of the present disclosure Changes and modifications possible, especially such variants, Elements and combinations and / or materials, for example, by Combination or modification of individual in connection with that in the general description and embodiments as well as the claims described features and elements contained in the drawings or process steps for the person skilled in the art with a view to solving the Task can be removed and combined to create a new one Subject or new process steps or process step sequences lead, also insofar as they relate to manufacturing, testing and working processes.

Claims (6)

1. Shift mechanism for performing shifts in an automated transmission of a vehicle with at least one shift shaft for actuating and at least one shift rail assigned for engaging a gear, characterized in that the shift shaft is coupled to the respective shift rail in such a way that simultaneous actuation prevents a plurality of shift rails becomes. 2. Switching mechanism according to claim 1, characterized in that on the Shift shaft rotates a selector fork to carry out the selection movement is arranged and at least one shift finger is provided, which by the shift shaft is rotatable and axially movable through the selection fork, with the selector fork is provided at least one keyway, so that the shift finger is not assigned to several shift rails at the same time. 3. Switching mechanism according to claim 2, characterized in that the Keyway arranged so that they are parallel to the teeth of the toothing the shift shaft is aligned. 4. shaft mechanism according to claim 3, characterized in that at a locked position of the selector shaft a tooth in the keyway is included. 5. Switching mechanism according to claim 3 or 4, characterized in that the control shaft is released when the keyway between two neighboring Teeth of the toothing is arranged. 6. Switching mechanism according to one of claims 2 to 5, characterized characterized that the corners of the teeth and / or the keyway have corresponding bevels or curves.