DE19947763C1 - Actuator device for coupling or gear change box has servo transmission fixing part of change gear unit when uncoupled - Google Patents

Abstract

The device has a servo motor driving a servo transmission, which un/couples a change gear unit of a gear change box to the motor. When uncoupled, the servo transmission (10) fixes at least part (12) of the change gear unit (16) positively and/or non-positively. The servo transmission has at least one servo element (18) with transmission unit (22), for effective coupling of the change gear unit part to the servo motor (84). The transmission unit is a coupling bar.

Description

The invention relates to an actuator according to the Preamble of claim 1.

DE 196 35 867 C2 is a generic actuator supply device known. The actuator has an electric servomotor and one driven by the servomotor benes actuator via which a switching device of a Gear change gear and a gear change gear be upstream clutch can be operated. The actuator is with its drive shaft with a worm of the actuator rotatably connected with one on a Shaft combs worm gear mounted for rotation. Next to the Worm wheel has a cam attached to the shaft, that works with a cam in the form of a roll. The Roller is reciprocable at one end Linkage rotatably mounted with a release lever Coupling is operatively connected.

The actuator also has an actuator in the form a solenoid, with which the servomotor via an auxiliary clutch tion with the switching device of the gear change transmission can be brought into operative connection. A first part of the Auxiliary clutch is on the shaft next to the cam increases. A two part of the coupling is on one to the shaft coaxially arranged axis rotatable and above the solenoid  axially displaceable. The second part of the clutch is a pin is eccentrically fastened, which has a uniaxial Ge steering is connected to a coupling rod. The coupling rod is about another uniaxial joint with one end connected in a reciprocating linkage over which the switching device can be actuated.

Furthermore, DE 196 27 980 A1 is an alternative actuator supply device known. A clutch is placed over one a cam guided cam actuated. Instead of one Control element and an auxiliary clutch is in contrast to the in DE 196 35 867 C2 by the rotary movement of the cam an eccentrically attached bolt in a cam on the cam ne rotatably mounted swing arm that is connected via a ver serration with a shift or selector rod of a shift device device is connected.

The invention has for its object the generic Develop device further and in particular the con to reduce structural effort and required installation space. It is according to the invention by the features of independency solved claims. Further configurations result from the subclaims.

The invention is based on a device with at least one egg a servomotor and one driven by the servomotor Actuator with which a switching device of a gearwheel change gearbox can be connected and disconnected and in the connected Zu stood operable and one in the power flow the gear change drives upstream clutch can be engaged and disengaged.

It is proposed that the position in the uncoupled state gearbox force at least a part of the switching device  and / or fixed positively. To ensure that after a switching operation, the switching device in the desired Switching position remains; the switching device is advantageous adheres positively and / or non-positively in its switch positions fixed. According to the invention, an existing component is used for this of the actuator used, making a structurally simple and inexpensive fixation achieved and especially additional components, installation space, installation effort and costs saved can be.

The coupling and uncoupling process can be done by moving a Ge drive member can be reached automatically, such as described in DE 196 27 980 A1, or advantageously with a Actuator and a transmission means. With a Stellele ment, for example a solenoid, a hydraulic Actuator, etc., can be highly flexible in terms of constructive design and the switching process achieved who the. It can be, for example, with a structurally simple Device performed certain operations in parallel and there saved by time and it can be easily controlled by an actuator are approached more like two switch positions. Furthermore, the actuating movement of the transmission member advantageous ge are used to form part of the switching device fix.

A particularly constructively simple and inexpensive Kon structure results from the transfer means of a Coupling rod is formed, which is articulated at one end Rod of the switching device is stored and at its other end de pivotable about the bearing element and in a pivoted position in the uncoupled state is fixed to a housing part.  

It is also proposed that the gear change transmission is a dual clutch transmission. Except for an overlap control is advantageously always a servo one Clutch available to perform a shift. Switching operations can be carried out in parallel to coupling operations leads, it may take time and in particular additional construction parts can be saved.

Dual clutch transmissions usually have two in force flow parallel to each other arranged gearboxes, except in the case of an overlap control, a partial transmission through the Power flow loaded and a partial transmission is not loaded. At the partial transmission under load can be selected Switch position are secured by the flow of force. In which load-free partial transmission can be carried out after a shift operation, the selected switching position is particularly advantageous be secured by the actuator. It can surely ver be avoided that the switching device for example adjusted by vibrations.

The actuating gear can make sense to everyone, to the expert fully appearing gear forms are formed, for example by a worm gear with a cam, etc. Be at least has the actuating gear particularly advantageously a coupling rod that is articulated with a first end with egg part of the clutch or with one in effect with the clutch connected part is connected and with a second End is connected to a gear of the actuator, wherein the second end relative to the gear over an angular range of the gear slidably guided and from an angular position in a direction of rotation of the gear with the gear via Stop is positively connected. A gear, for example as a worm gear of a worm gear, can additionally  used as an actuator and additional Components can be saved, such as a curve disc. Furthermore, by the coupling rod or by a Coupling linkage of the positioning motor is particularly flexible locally be classified.

The stop can be from an additional attached to the gear Chen component formed or advantageous to the gear be shaped, for example by a projection or a Indentation on an end or side surface of the gear. In an advantageous embodiment is the coupling rod with ih rem guided second end in an elongated hole in the gear, wherein at least one end of the elongated hole forms the stop. It can a particularly inexpensive and space-saving construction can be achieved without additional components. In addition, a Gear advantageous for actively closing and actively opening Couplings are used, namely by both ends of the Elongated holes can be used as a stop.

Components can also be saved by using the actuator gearbox at least two separate rods, switching and / or Selector rods, the switching device can be actuated. The Stan gene of the switching device are preferably via at at least one control element can be connected and disconnected. The Poles can each with or advantageously with one common gear link are brought into operative connection, whereby additional gear links can be saved. In the case of a disk-shaped transmission link, for example one Gear, both sides can be used to advantage to operate at least one rod at a time.

A connection between the gear link and the rods can be non-positive and / or positive,  for example, with bolts and teeth that engage in grooves etc., being advantageous with several intervention options the switching process can be made particularly flexible. With several intervention options, for example according to existing boundary conditions between a sequential and an at least partially parallel switching operation be rare.

In addition to the side surfaces of a disc-shaped gear link can also advantageously multiple diameters of a gear member and / or an end face of a roll, for example shaped gear link to actuate several se separate rods of the switching device can be used.

The solutions according to the invention can be used in various Couplers that appear to be sensible as active, such as active closing and actively opening clutches etc. as well as at various fully or partially automated gear changes be used driven.

Further advantages result from the following drawing spelling. In the drawing, an embodiment of the Invention shown. The description and the claims ent keep numerous features in combination. The specialist will expediently also consider and consider the features individually summarize other useful combinations.

It shows:

Fig. 1 is a schematic representation of a Doppelkupplung clutch transmission,

Fig. 2 is a schematic representation of a erfindungsge MAESSEN actuating device of a clutch of the dual clutch transmission of Fig. 1,

Fig. 3 is a view in the direction III in Fig. 2,

FIGS. 4 to 6 is an actuator of FIG. 2 during loading make a switching device, and

Fig. 7 is an actuator of FIG. 2 when loading a clutch.

Fig. 1 shows a designed as a dual clutch transmission change-speed gearbox 32 in which an input shaft 62 to an output shaft 64 by a first and a second non-shown gear train 66 is connected to 68, which are arranged in the power flow parallel to each other. The Teilgetrie ben 66 , 68 is a frictional load switching clutch 38 , 40 upstream in the power flow. The powershift clutches 38 , 40 are concentric with each other and to the input shaft 62 coaxially arranged intermediate shafts 70 , 72 with the Teilge gear 66 , 68 connected. The powershift clutch 38 is closed so that a power flow from the input shaft 62 via the powershift clutch 38 , the intermediate shaft 72 , the gearbox 68 can flow to the output shaft 64 . The second part gear 66 is load-free.

In Fig. 2, the clutch 38 is shown with an actuating device Be invention. The Betätigungsvor direction has an electric servomotor 84 and a driven from the servo motor 84 actuating gear 10 to which a switching device 16 of the gear change transmission 32 to the servo motor 84 operably coupled and uncoupled and operated in the coupled state and the change gear in the power flow to the gears 32 arranged upstream of clutch 38 can be engaged and disengaged. Instead of an electric servomotor 84 , other drives which appear to be useful to the person skilled in the art can also be used. The servomotor 84 is rotatably connected to its drive shaft 86 with a worm 88 of the actuating gear 10 , which meshes with a worm wheel 44 rotatably mounted on an axis 90 .

The actuator 10 has a coupling rod 34 which is articulated with egg nem first end with a release bearing 36 of the hitch 38 and with a second end with a guide 124 over an angular range 42 in a slot 52 in the worm wheel 44 is slidably guided. From an angular position 46 shown in FIG. 2, the coupling rod 34 is positively connected to the worm wheel 44 via a stop 48 in a direction of rotation 50 of the worm wheel 44 . The stop 48 is formed by one end of the elongated hole 52 .

The release bearing 36 is operatively connected to a plate spring 92 of the coupling 38 . The plate spring 92 acts in the closing direction of the clutch 38 on a pressure plate 76 which is rotatably connected to a flywheel 74 and is rotatably mounted with the latter about a common axis 78 . Between the flywheel 74 and the pressure plate 76 , a clutch disc 80 with clutch linings 82 is arranged, which is rotatably connected to the intermediate shaft 72 ( Fig. 1). In the direction of rotation 50 of the worm wheel 44 , from the angular position 46 with the worm wheel 44 via the stop 48 and the coupling rod 34, the release bearing 36 can be moved against the plate spring 92 of the clutch 38 and the clutch 38 can be opened ( FIG. 7). The clutch 38 shown is a so-called actively opening clutch 38 .

From the angular position 46 , the worm wheel 44 with two shift rods 12 , 14 can be brought into a connection in a second direction of rotation 94 (FIGS . 2 to 6). In order to avoid that the release bearing 36 while the movement of the worm wheel 44 follows the coupling rod 34 is limited in this transmission direction of the actuator 10 in its movement about an unspecified set Darge stop. The worm wheel 44 has on its side faces 54 , 56 eccentrically attached bolts 58 , 60 , wherein instead of bolts 58 , 60 also toothing or other means which are considered suitable by a person skilled in the art can be attached in order to produce a positive and / or non-positive connection. If the worm wheel 44 is rotated in the direction of rotation 94 , the bolts 58 , 60 move in the direction of the shift rods 12 , 14 ( FIG. 4). Coupling rods 22 , 24 are articulated on the shift rods 12 , 14 in bearing points 26 . Are the bolts 58 , 60 directly above the shift rods 12 , 14 , NEN coupling rods 22 , 24 each individually via lifting magnets 18 , 20 to the bearing points 26 against a compression spring 122 and pivots with the bolts 58 , 60 in the coupling rods 22 , 24 recesses 96 are positively engaged. In FIG. 5, the shift rod 12 is positively connected to the worm wheel 44 via the coupling rod 22 and the bolt 58 and is thus in operative connection with the servomotor 84 . Then the shift rod 12 can be moved with the servomotor 84 via the actuating gear 10 in a desired switching position 98 , 100 , 102 in the axial direction 118 , 120 . Via the shift rods 12 , 14 not shown switching elements of the load-free Teilge gear 66 can be selected and switched.

Each shift rod 12 , 14 can be moved with the servomotor 84 via the actuating gear 10 into three different shift positions 98 , 100 , 102 . In each switching position 98 , 100 , 102 , the coupling rod 22 has a recess 106 , 108 , 110 . When the desired switching position 98 is reached ( FIG. 6), a ball 114 pressed against the switching rod 12 by a spring 112 snaps into a recess 116 in the switching rod 12 . At closing the coupling rod 22 is pivoted back by the lifting magnet 18 or by the compression spring 122 . In a pivot position 28, a projection 104 on a housing seteil 30 of the gear change transmission 32 engages positively in the recess 106 of the coupling rod 22 , whereby the shift rod 12 through the actuating gear 10 or through the coupling rod 22 in the uncoupled state in its switching position 98 positively is fixed. Once the switching process has been carried out, the clutch 38 can be opened with the servomotor 84 via the actuating gear 10 in the direction of rotation 50 of the worm wheel 44 from an angular position 46 ( FIG. 7).

The clutch 40 has an actuating device, corresponding to the clutch 38 , not shown, with which the partial transmission 68 can be shifted.

Claims (12)

1.Actuating device with at least one servomotor and with a servomotor driven by the servomotor, with which a switching device of a gear change transmission can be effectively coupled and uncoupled to the servomotor and actuated in the coupled state and a clutch arranged upstream of the gear change gear can be engaged and disengaged, characterized in that at least positively fixed in the uncoupled state, the actuating mechanism (10) comprises a part (12, 14) of the switching device (16) positively and / or. 2. Actuating device according to claim 1, characterized in that the actuating gear ( 10 ) has at least one actuating element ( 18 , 20 ) with at least one transmission means ( 22 , 24 ), via which at least part ( 12 , 14 ) of the switching device ( 16 ) The actuator ( 84 ) can be coupled and uncoupled effectively, the transmission means ( 22 , 24 ) in the uncoupled state positively fixing the part ( 12 , 14 ) of the switching device ( 16 ). 3. Actuating device according to claim 2, characterized in that the transmission means ( 22 , 24 ) is formed by a coupling rod which is articulated at one end to a rod ( 12 , 14 ) of the switching device ( 16 ) and at its other end the adjusting element ( 18 , 20 ) can be pivoted about the bearing point ( 26 ) and is positively fixed to a housing part ( 30 ) in a pivoted position ( 28 ) in the uncoupled state. 4. Actuating device according to one of the preceding claims, characterized in that the actuating gear ( 10 ) has at least one coupling rod ( 34 ) which is articulated with a first end with a part ( 36 ) of the coupling ( 38 ) or with one with the coupling ( 38 ) is connected in operative connection and is connected at a second end to a gear ( 44 ) of the actuating gear ( 10 ), the second end being displaceable relative to the gear ( 44 ) over an angular range ( 42 ) of the gear ( 44 ) guided and from an angular position ( 46 ) in a direction of rotation ( 50 ) of the gear ( 44 ) with the gear ( 44 ) via a stop ( 48 ) is positively connected. 5. Actuator according to the preamble of claim 1, characterized in that the actuating gear ( 10 ) has at least one coupling rod ( 34 ) which is articulated with a first end with a part ( 36 ) of the coupling ( 38 ) or with one with the coupling ( 38 ) is connected in operative connection and is connected at a second end to a gear ( 44 ) of the actuating gear ( 10 ), the second end being displaceable relative to the gear ( 44 ) over an angular range ( 42 ) of the gear ( 44 ) guided and from an angular position ( 46 ) in a direction of rotation ( 50 ) of the gear ( 44 ) with the gear ( 44 ) via a stop ( 48 ) is positively connected. 6. Actuating device according to claim 5, characterized in that the coupling rod ( 34 ) with its second end in an elongated hole ( 52 ) - in the gear ( 44 ) is guided and at least one end of the elongated hole ( 52 ) forms the stop ( 48 ). 7. Actuating device according to one of the preceding claims, characterized in that with the actuating gear ( 10 ) at least two separate rods ( 12 , 14 ) of the switching device ( 16 ) can be actuated. 8. Actuating device according to claim 7, characterized in that at least two separate rods ( 12 , 14 ) of the Schaltvor direction ( 16 ) with a common gear member ( 44 ) of the actuating gear ( 10 ) can be brought into operative connection. 9. Actuating device according to claim 8, characterized in that the gear member ( 44 ) is disc-shaped and on its two side surfaces ( 54 , 56 ) means ( 58 , 60 ) for producing a positive connection with at least one rod ( 12 , 14) ) of the switching device ( 16 ). 10. Actuating device according to claim 8 or 9, characterized, that at least two separate rods of the switching device two different diameters of the transmission link with the Gear link can be brought into operative connection.   11. Actuating device according to one of claims 8 to 10, characterized, that with at least two separate rods of the switching device one end of the gear link can be brought into operative connection are. 12. Actuating device according to one of the preceding claims, characterized in that the gear change transmission ( 32 ) is a double clutch transmission.