DE102015214719A1 - Actuator device for a transmission and transmission with the actuator device - Google Patents

Abstract

In gear change transmissions, shafts are selectively coupled via coupling devices with idler gears to change gears. The coupling devices usually have a body which is rotatably connected to the shaft. For coupling, the coupling devices usually comprise a sliding sleeve, which has an inner axial toothing, wherein the sliding sleeve is non-rotatably, but axially displaceably connected to the body. By an axial displacement of the sliding sleeve, this is moved to a coupling portion of the idler gear, so that the idler gear and the body are rotatably connected via the sliding sleeve. The invention has for its object to provide an actuator device for switching a transmission, which is easy to integrate. For this purpose, an actuator device 1 for a transmission 2 with a shift sleeve insert 3 for coupling a synchronizer body 23 with a loose wheel 22a, b, with an electric motor 5 for axially displacing the shift sleeve insert 3, proposed, wherein the shift sleeve insert 3 coaxial with the electric motor 5 and / or is arranged in the electric motor 5.

Description

The invention relates to an actuator device for a transmission with a shift sleeve insert for coupling a synchronizer body with a loose wheel and with an electric motor for axial displacement of the shift sleeve insert. Furthermore, the invention relates to a transmission with this actuator device.

In gear change transmissions, shafts are selectively coupled via coupling devices with idler gears to change gears. The coupling devices usually have a body which is rotatably connected to the shaft. For coupling, the coupling devices usually comprise a sliding sleeve, which has an inner axial toothing, wherein the sliding sleeve is non-rotatably, but axially displaceably connected to the body. By an axial displacement of the sliding sleeve, this is moved to a coupling portion of the idler gear, so that the idler gear and the body are rotatably connected via the sliding sleeve. Optionally, a synchronizer can be arranged between the idler gear and the coupling device in order to equalize the rotational speed between the shaft and the idler gear.

The actuation of the sliding sleeve is often done by shift forks, which engage in a circumferential groove of the sliding sleeve and which can put the sliding sleeve in the axial direction. The shift forks are operated as a function of the configuration of the gear change by the switching force applied by a driver or by an actuator.

The publication WO 2004/00 5769 A1 , which probably forms the closest prior art, discloses a transmission circuit for idler gears with sliding sleeves, which are rotatably connected to a main shaft and can be brought by axial displacement with a loose wheel to be switched in positive engagement, wherein the actuation of the respective sliding sleeve is provided via at least one actuator wherein the actuator comprises an electric servomotor.

The invention has for its object to provide an actuator device for switching a transmission, which is easy to integrate. This object is achieved by an actuator device with the features of claim 1 and by a transmission with the features of claim 9. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

The invention relates to an actuator device which is suitable and / or designed for a transmission. In particular, the transmission is designed as a gear change gearbox or as a gear change gearbox. The Aktorvorrichung is designed in particular for switching, preferably, the actuator device has the task to implement a coupling and / or decoupling between a shaft of the transmission and a loose wheel, in particular a gear wheel of the transmission.

The actuator device has a shift sleeve insert which is suitable and / or designed for coupling a synchronizer to the loose wheel. The synchronizer body is in particular arranged rotationally fixed on the shaft. Optionally, the synchronizer body forms part of the actuator device. The idler gear is arranged coaxially with the shaft and rotatably supported. The shift sleeve insert is preferably designed sleeve-shaped, wherein on the inner wall Axialinnenverzahnung is arranged. The synchronizer body has an external axial toothing, which is in a positive engagement with the Axialinnenverzahnung the shift sleeve insert, so that the shift sleeve insert and the synchronizer body are arranged rotationally fixed to each other.

The idler gear, in particular a coupling portion of the idler gear, has an axial external toothing, so that the idler gear with the shift sleeve insert and thus with the synchronizer body can be brought into a positive engagement and thus rotatably coupled. In the coupled state of the shift sleeve insert is in a positive engagement with the synchronizer body and at the same time with the idler gear, so that the synchronizer body and thus the shaft with the idler gear is positively and / or rotatably connected.

The actuator device further comprises an electric motor for axial displacement of the shift sleeve insert. In particular, the electric motor forms a drive for axial displacement of the shift sleeve insert. Preferably, the electric motor is assigned exclusively to the shift sleeve insert. The electric motor has a rotor and a stator. In particular, the electric motor is designed as an internal rotor. Preferably, the electric motor and / or its integration is designed so that the shift sleeve insert can be moved so that the shift sleeve insert can couple and decouple the idler gear. Preferably, the electric motor is designed as a stepper motor. Alternatively, the electric motor can be designed as a servo motor with an encoder, in particular an absolute encoder, for the angular position. Through this preferred embodiment, the axial position of the shift sleeve insert can be controlled via the angular position of the rotor.

In the context of the invention, it is proposed that the shift sleeve insert and the electric motor are arranged coaxially with each other. In particular, the electric motor, in particular a stator and / or rotor of the electric motor extends around the shift sleeve insert. Alternatively or additionally, it is claimed that the shift sleeve insert in the electric motor, in particular in a rotor space of the electric motor at least partially or completely arranged, in particular is integrated. Particularly preferably, the shift sleeve insert and the electric motor are arranged at least in sections or completely concentrically with one another.

Due to the arrangement or integration of the shift sleeve insert in the interior of the electric motor, in particular partially or completely in the rotor space of the electric motor, it is achieved that the space requirement for the actuator device is very low. In particular, no complex lever mechanisms are required to transmit a movement from the electric motor to the shift sleeve insert.

Instead, shift sleeve insert and electric motor are arranged very space saving to each other.

In particular, the actuator device is designed as a direct drive for the shift sleeve insert. The terms axial and radial refer to the shaft or a main axis defined by the shaft, which is aligned coaxially with the shift sleeve insert and / or to the idler gear and / or to the electric motor.

In a preferred embodiment of the invention, the electric motor and the shift sleeve insert are operatively connected to each other via a rotary linear converter. The rotary linear converter has the function to implement a rotational movement of the electric motor, in particular of the rotor of the electric motor, in a linear movement of the shift sleeve insert in the axial direction for moving the shift sleeve insert.

In a preferred structural embodiment of the invention, the actuator device comprises a push insert and a rotor device. The rotor device comprises or is formed by the rotor of the electric motor. The rotor device may be integral or composed of several parts. In particular, the rotor device is rotatably formed with the rotor. The push insert is arranged coaxially with the rotor device and / or in the rotor device. The thrust body is e.g. designed as a sleeve. Preferably, the push insert is rotatably disposed in the actuator device. On the one hand, the push insert with the rotor device and on the other hand, the push insert is operatively connected to the shift sleeve insert. The active compounds are designed so that a rotation of the rotor device leads to an axial displacement of the push insert and the shift sleeve insert.

In particular, the rotor device and the push insert together form a spindle drive, which converts the rotational movement and the linear movement. Alternatively or additionally, the rotor device and the push insert are operatively connected to one another via a thread. In this case, the push insert has an external thread and the rotor device has an internal thread, with the external thread and the internal thread interlocking. If the rotor device rotates, the push insert is turned out in the axial direction.

Preferably, the shift sleeve insert and the push insert are non-displaceable in the axial direction, preferably non-displaceably positive, are coupled together. However, push insert and shift sleeve insert are decoupled in the direction of rotation, so that the shift sleeve insert, which is rotatably coupled to the shaft or coupled, can rotate during operation, regardless of the push insert.

It is particularly preferred that the push insert is mounted relative to the shift sleeve insert via a thrust bearing assembly. The radial mounting of the shift sleeve insert is preferably carried out by the support on the synchronizer body. However, a thrust bearing arrangement is advantageous because the push insert moves the shift sleeve insert in the axial direction, so that it must contact the shift sleeve insert. In particular, during operation, the shaft, so that the synchronizer body and with this the shift sleeve insert rotate strongly, so that the thrust bearing assembly reduces the friction in the actuator device.

In a preferred structural embodiment, the thrust bearing assembly comprises a first and a second axial roller bearing. A shoulder portion of the shift sleeve insert is disposed between the Axialwälzlagern. Thus, the shift sleeve insert is supported by the Axialwälzlagern in the axial direction on both sides. The Axialwälzlager be embraced by the push insert on both sides, so that by embracing an abutment is formed. For example, a shoulder can be inserted into the push insert for the anvil, but alternatively a ring is inserted into the push insert. Such a ring is also advantageous in order to design the actuator device in an assembly-appropriate manner.

It is particularly preferred that in a neutral state of the actuator device of Shift sleeve insert is arranged in the electric motor flush or even offset inwards. In particular, the shift sleeve insert in the axial direction as long as the electric motor, in particular the rotor of the electric motor, designed or even implemented shorter. This ensures that the actuator device is very compact.

Another object of the invention relates to a transmission, in particular a gear change gear or gear change transmission, with a shaft, in particular a main shaft, a synchronizer body, wherein the synchronizer body is rotatably mounted on the shaft, and at least one idler gear, wherein the idler gear is disposed on the shaft. Furthermore, the transmission comprises the actuator device according to one of the preceding claims. As already explained, the actuator device serves to positively couple or decouple the synchronizer body with the idler gear by means of the shift sleeve insert.

It is envisaged that in a neutral state of the shift sleeve insert is arranged in the electric motor and the idler gear is decoupled from the shift sleeve insert. Furthermore, the transmission can assume at least or exactly a coupling state, wherein the synchronizer body is positively coupled to the idler gear by the shift sleeve insert in the direction of rotation.

Further features, effects and advantages of the invention will become apparent from the following description of a preferred embodiment of the invention and the accompanying figures. Showing:

1 a schematic longitudinal section through an actuator device together with a detailed representation of the actuator device as an embodiment of the invention;

2 the actuator device in the 1 in an exploded view;

The 3a C is a transmission with the actuator device of the preceding figures in different operating conditions.

The 1 shows an actuator device 1 for a transmission 2 ( 3a , b, c) as an embodiment of the invention in a schematic longitudinal section along a main axis H of the actuator device 1 , The gear 2 is designed as a gear or gear change transmission. The actuator device 1 is adapted to perform under control a gear or gear change.

The actuator device 1 has a shift sleeve insert 3 on. The shift sleeve insert 3 is formed as a sleeve, wherein on its inner circumferential surface an axial toothing 4 arranged with a plurality in the axial direction or parallel to the main axis H extending teeth, in particular is formed. In particular, the axial toothing 4 designed as a roof toothing.

The actuator device has an electric motor 5 on, which is designed as an internal rotor. The electric motor 5 has a stator 6 and an internal rotor 7 on. The rotor 7 defined by its inner peripheral surface and its axial extent a rotor space, wherein in the rotor space of the shift sleeve insert 3 is arranged. In particular, the electric motor 5 , the stator 6 , the rotor 7 and the shift sleeve insert 3 arranged coaxially with each other. In the presentation in the 1 the actuator device is in a neutral state, wherein the shift sleeve insert 3 concentric with the electric motor 5 , the stator 6 and / or the rotor 7 is arranged. The actuator device 1 is very compact, with the axial width of the actuator device 1 in the neutral state by the axial width of the stator 6 or the rotor 7 is fixed. The axial sides of the shift sleeve insert 3 are arranged inside the rotor space.

On the right side is a detail of the actuator device 1 shown, from which it can be seen that the stator 6 is designed as a circumferential sleeve or ring. The rotor 7 is as a rotor device 8th formed and carries at its radially inner circumferential surface an internal thread 9 , In other embodiments, the internal thread 9 also as a separate part on the rotor 7 be set up so rotor 7 and internal thread 9 together the rotor device 8th form.

Furthermore, a push insert 10 provided coaxially with the major axis H. The push insert 10 carries on its radial outer surface an external thread 11 , The external thread 11 is engaged with the internal thread 9 , The push insert 10 and the rotor device 8th together form a spindle drive and / or a rotary linear converter. Upon rotation of the rotor device 8th is about the internal thread 9 and the external thread 11 the push insert 10 moved in the axial direction to the main axis of rotation H. It is preferably ensured that the push insert 10 can not turn.

The push insert 10 is in turn via a thrust bearing assembly 12 with the shift sleeve insert 3 connected, in such a way that the shift sleeve insert 3 regardless of the push insert 10 can rotate, but in the axial movement in both axial directions of the push insert 10 is taken.

The axial bearing arrangement has a first and a second axial roller bearing 13a , b on. The shift sleeve insert 3 has a shoulder section 14 on, which in this present embodiment by a groove portion 15 in two single bridges 16a , b is subdivided. At the axial outer sides of the single webs 16a , b or the shoulder portion 14 each one of the axial roller bearings 13a , b on. In particular, in each case a bearing ring of the Axialwälzlagers 13a , b with the sliding sleeve insert 3 rotatably connected.

The other bearing ring of Axialwälzlager 13a b is against the push insert 10 rotatably coupled. For this purpose, the push insert 10 on its radially inner peripheral surface an abutment shoulder 17 on, at the axial rolling bearing 13a optionally applied with the interposition of a seal. On the opposite side is in the push insert 10 a circumferential groove 18 for receiving a retaining ring 19 attached, wherein the second bearing ring of the second thrust roller bearing 13b on the retaining ring 19 supported in the axial direction. Also with the second axial rolling bearing 13b can be provided that a seal is interposed. Will now be the push insert 10 by rotation of the rotor device 8th in the picture in the 1 moved to the right, so presses the contact shoulder 17 on the first axial rolling bearing 13a and thus pushes the shift sleeve insert 3 in the desired direction. Will the push insert 10 driven to the left, so presses the retaining ring 19 against the second axial rolling bearing 13b so that the shift sleeve insert 3 is driven in the desired direction.

In the 2 is the actuator device 1 shown in an exploded view, it can be seen that the electric motor 5 with the stator 6 and the rotor 7 forms a very large passage openings. The axial width of the electric motor 5 is larger than the simple ring width of the electric motor 5 in the radial direction. The free diameter of the electric motor 5 is at least five times as large as the simple single ring width of the electric motor 5 in the radial direction.

On the inner peripheral surface of the rotor 7 is the internal thread 9 recognizable, which in the present case has only three threads. Due to the small number of threads of the internal thread 9 is done with a few turns of the rotor 7 achieved a large axial stroke.

On the left side in the 2 is the push insert 10 shown, which is designed as a sleeve. The push insert 10 has an external thread 11 on, which is complementary to the internal thread 9 is trained.

In a middle area is the shift sleeve insert 3 shown, with the webs 16a , b, which are the shift sleeve insert 3 revolve and the shoulder section 14 form. Left and right next to the shift sleeve insert 3 are the axial rolling bearings 13a . 13b represented, which each have a sealing attachment. In addition, the retaining ring 19 shown.

The 3a , b, c respectively show the transmission 2 or a section of it with a wave 21 , on the two loose wheels 22a . 22b are set up. Between the loose wheels 22a , b is the actuator device 1 arranged. On the wave 21 also sits a synchronizer body 23 that with the wave 21 rotatably connected. Between the synchronizer body 23 and the loose wheels 22a , b is a synchronous ring or a synchronizing ring packet 24a , b arranged. The shift sleeve insert 3 stands with the Axialinnenverzahnung 4 in engagement with an external axial toothing 25 of the synchronizer body 23 , Upon actuation of the actuator device 1 becomes the push insert 10 and thus the shift sleeve insert 3 in the axial direction to the idler gear 24a postponed. As soon as the shift sleeve insert 3 a coupling section 26a , b of the first and second idler gear 22a , b engages or intervene, are the synchronizer body 23 and the respective idler gear 22a , B positively coupled with each other rotationally fixed.

In the 3b is the transmission 20 shown in a neutral state, wherein the shift sleeve insert 3 completely in the rotor space of the rotor 7 is arranged. In the 3a a first switching state is shown, wherein the shift sleeve insert 3 extended to the left and with the idler gear 22a rotatably connected. In the 3c a second switching state is shown, wherein the shift sleeve insert 3 extended to the right and with the second idler gear 22b rotatably coupled.

LIST OF REFERENCE NUMBERS

1

 actuator device

2

 transmission

3

 Switching sleeve insert

4

 Axialinnenverzahnung

5

 electric motor

6

 stator

7

 rotor

8th

 rotor means

9

 inner thread

10

 railable

11

 external thread

12

 The axial bearing

13a, b

 thrust roller bearing

14

 shoulder portion

15

 groove

16a, b

 individual webs

17

 contact shoulder

18

 groove

19

 retaining ring

21

 wave

22a, b

 loose wheels

23

 synchronizer

24a, b

 Synchronizer ring / synchronizer ring package

25

 Axialaußenverzahnung

26a, b

 coupling portions

H

 main axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2004/005769 A1 [0004]

Claims (10)

Actuator device ( 1 ) for a transmission ( 2 ) with a shift sleeve insert ( 3 ) for coupling a synchronous body ( 23 ) with a loose wheel ( 22a , b), with an electric motor ( 5 ) for axial displacement of the shift sleeve insert ( 3 ), characterized in that the shift sleeve insert ( 3 ) coaxial with the electric motor ( 5 ) and / or in the electric motor ( 5 ) is arranged. Actuator device ( 1 ) according to claim 1, characterized in that the electric motor ( 5 ) and the shift sleeve insert ( 3 ) are operatively connected to each other via a rotary linear converter. Actuator device ( 1 ) according to claim 1 or 2, characterized by a push insert ( 10 ) and a rotor device ( 8th ) of the electric motor ( 5 ), whereby the push insert ( 10 ) coaxial with and / or in the rotor device ( 8th ) is arranged, wherein the push insert ( 10 ) with the rotor device ( 8th ) and with the shift sleeve insert ( 3 ) is operatively connected, so that a rotation of the rotor device ( 8th ) to an axial displacement of the push insert ( 10 ) and the shift sleeve insert ( 3 ) leads. Actuator device ( 1 ) according to claim 3, characterized in that the rotor device ( 8th ) and the push insert ( 10 ) form a spindle drive and / or are operatively connected to each other via a thread. Actuator device ( 1 ) according to claim 3 or 4, characterized in that the push insert ( 10 ) and the shift sleeve insert ( 3 ) are coupled together so as to be non-displaceable in the axial direction and decoupled in the direction of rotation. Actuator device ( 1 ) according to one of claims 3 to 5, characterized in that the push insert ( 10 ) relative to the shift sleeve insert ( 3 ) via a thrust bearing arrangement ( 12 ) is stored. Actuator device ( 1 ) according to claim 6, characterized in that the axial bearing arrangement ( 12 ) a first and a second axial rolling bearing ( 13a , b), wherein a shoulder portion ( 14 ) of the shift sleeve insert ( 3 ) between the thrust roller bearings ( 13a , b) is arranged and the thrust roller bearings ( 13a , b) of the push insert ( 10 ) are embraced on both sides. Actuator device ( 1 ) according to one of the preceding claims, characterized in that in a neutral state of the shift sleeve insert ( 3 ) in the electric motor ( 5 ) is arranged flush or offset inwards. Transmission ( 2 ) with a wave ( 21 ), a synchronous body ( 23 ), wherein the synchronous body ( 23 ) rotatably on the shaft ( 21 ), at least one loose wheel ( 22a , b) and the actuator device ( 1 ) according to any one of the preceding claims. Transmission ( 2 ) according to claim 9, characterized in that in a coupling state of the synchronous body ( 23 ) with the loose wheel ( 22a , b) through the shift sleeve insert ( 3 ) is positively coupled.

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