DE102013224483A1 - Actuation device for a change gear and change gear with the actuator - Google Patents

Abstract

It is an object of the present invention to propose a functionally reliable actuator for a change gear of a motor vehicle. For this purpose, actuating device 1 for a change gear of a motor vehicle with a switching shaft 3, wherein the switching shaft 3 defines a main axis H, with a housing portion 2, wherein the switching shaft 3 is guided through the housing portion 2, with a cap 16, wherein the cap 16 axially displaced is arranged on the shift shaft 3, with a selector lever 6 for displacing the shift shaft 3 in the axial direction of the main axis H, wherein the selector lever 6, a pivotal region 10 about which the selector lever 6 is pivotable relative to the housing portion 2, an actuating arm 12, over the the selector lever 6 is operable, and an engaging arm 13 comprising an engaging portion 15, wherein the engaging arm 13 is formed to engage with the engaging portion 15 in the cap 16 to displace the switching shaft 3 in the axial direction proposed, wherein the cap 16 a window portion 18, in which the engaging portion 15 engages.

Description

The invention relates to an actuator for a change gear of a motor vehicle with a shift shaft, wherein the shift shaft defines a main axis, with a housing portion, wherein the shift shaft is guided through the housing portion, with a cap, wherein the cap is arranged axially displaced on the shift shaft, and with a selector lever for displacing the control shaft in the axial direction of the main axis, the selector lever having a pivotal range about which the selector lever is pivotable relative to the housing portion, an actuating arm via which the selector lever is actuated, and an engagement arm comprising an engagement portion; Engaging arm is formed to engage with the engagement portion in the cap to move the shift shaft in the axial direction. The invention also relates to a change gear with the actuator.

In vehicles selector and switching movements of the driver are often transmitted via cables or linkage in the engine compartment, where the switching and Wählbewegungen be implemented via an actuating gear in axial displacements and rotations of a shift shaft.

For example, the document discloses DE 10 2007 045 654 A1 , which is probably the closest prior art, an actuating gear for a change gear of a motor vehicle with at least two levers coupled together, which cooperate with a switching shaft for their axial and radial movement. A selector lever is coupled to a transmission device for axial displacement of the shift shaft and a shift lever is rotatably connected to the radial rotation of the shift shaft with this. The transmission device has at least one engagement element axially fixed to the shift shaft, which interacts with a coupling element of the selector lever, which is arranged at a free end of the pivotably mounted selector lever.

Field of the invention

It is an object of the present invention to propose a functionally reliable actuator for a change gear of a motor vehicle. This object is achieved by an actuating device with the features of claim 1 and by a change gear with the features of claim 10. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

In the context of the invention, an actuating device is proposed, which is suitable and / or designed for a change gear of a motor vehicle. The motor vehicle is in particular a passenger car or a truck. The change gear is designed in particular as a manual transmission, wherein different gears can be selected and switched. The different gears lead to different speed ratios of the transmission.

The actuating device comprises a switching shaft, wherein the switching shaft preferably switching elements, such as shift fingers and / or control elements, such as slotted guides, ramps, etc. The switching shaft defines with its pivot axis and / or with its longitudinal extent a major axis.

Furthermore, the actuating device comprises a housing portion, wherein the switching shaft is guided through the housing portion. Particularly preferably, the housing portion forms a separation between an external environment, in particular a lubricating oil-free external environment, such as an engine compartment of the vehicle, and an interior, in particular a lubricated oil-loaded interior, such. B. a shift gear compartment. To carry out the housing section has at least one passage opening for the switching shaft. For example, a seal, in particular a lubricating oil-tight seal, is arranged between the housing section and the selector shaft.

The actuating device comprises a cap, wherein the cap is axially displaceable and preferably arranged radially non-rotatably on the shift shaft. In particular, the cap is positioned on an outside of the housing portion facing the outside.

The actuating device comprises a selector lever, which is designed to displace the switching shaft in the axial direction of the main axis. Upon actuation of the selector lever, the selector shaft is displaced in a direction or in an opposite direction along the main axis in response. The selector lever has a pivoting portion, an engaging arm with an engaging portion, and an actuating arm. The selector lever may be straight, but this is preferably realized angled, wherein the actuating arm and the engagement arm occupy an angle between 100 degrees and 80 degrees. The actuating region is preferably arranged between the engagement arm and the actuating arm. The selector lever is pivotally mounted in the pivoting area relative to the housing portion. The actuating arm can be a mechanical interface, such as a ball pin, have, via the mechanical interface, the pivoting movement can be initiated. The engagement arm engages with the engagement portion in the cap and displaces the cap and thus also the switching shaft axially displaceably connected to the cap in the axial direction in response to the operation of the actuating arm. The selector lever is in particular designed to move the switching elements in a selector gate for selecting gears via the cap and the selector shaft.

In the context of the invention, it is proposed that the cap has a window area in which the engagement portion engages. It is even particularly preferred that the window area is formed as a passage opening, in particular a recess in the cap.

The advantage of the invention is the fact that the window portion forms a negative contour, so that when shifting or pivoting the switching shaft and thus the cap no problems with interference contours can occur, as may be the case, for example, when the engagement portion on a cantilevered Section of the cap attacks. Furthermore, the window area manufacturing technology is easily introduced, for example, by cutting into the cap, so that the production is simplified. In addition, a positive connection is produced by the engagement of the engagement section in the window region in the axial direction, so that the reliability is very high.

In a preferred structural embodiment of the invention, the window region is designed as a rectangle running in an axial height. In this embodiment, it is provided that the engagement section performs a circular path of movement during a pivoting movement of the selector lever, wherein on the one hand the cap is displaced in the axial direction and, on the other hand, the engagement section runs along the rectangle.

In a product-related implementation, it is possible, for example, that the engagement portion is formed as a sliding portion. However, in order to further reduce the friction, it is preferable that the engagement portion is realized as a roller.

Within the scope of the invention, it is possible for the engagement section to run directly along the window area on an edge of the window area on the cap. However, it is preferred that a plastic insert is inserted or disposed in the window region, wherein the plastic insert provides at least one raceway for the engagement element. The plastic insert can form fit as a separate component, z. B. by snapping, snapping or clipping, be used in the cap. Alternatively, the cap with plastic at least partially or completely encapsulated, wherein the plastic insert forms part of the encapsulation. Such a plastic insert ensures that the at least one raceway can be widened in the radial direction with respect to the main axis. In addition, the plastic insert has the advantage that the engagement portion does not have to run on the base material of the cap, which is in particular made of metal, and is thus exposed to increased wear. Instead, the engagement portion can run on the at least one raceway of the plastic insert, so that the wear is minimized. Furthermore, noise is avoided by this design measure, since the at least one career is made of plastic. In addition, if necessary, corrosion is excluded because a metallic contact is avoided and thus no abrasion of a coating takes place and thus no risk of corrosion grows. Also by these advantages, the functionality of the actuator is improved.

It is particularly preferred that the plastic insert is positively supported on the run length of the at least one raceway at an edge of the window area. Thus, the plastic insert forms a broadening of the area provided by the window area and thus by the cap support area.

It is particularly preferred that the plastic insert has two raceways, in particular an axially upper and an axially lower raceway, wherein the raceways are parallel to each other. In particular, the raceways each extend on a circular path around the main axis. If the shift shaft is displaced in a first direction, the engagement section runs on one of the raceways, the shift shaft is displaced in the opposite direction, the engagement section runs on the other of the two raceways. Particularly preferably engagement portion and the distance between the two tracks are coordinated such that the engagement portion runs with a small clearance or play. Particularly preferably, the two raceways form a preferably extending in the direction of rotation groove.

In a preferred structural embodiment of the invention, the housing portion is formed as a portion of a switching dome of the transmission and the cap as a dirt cap for covering the passage opening for the switching shaft in the switching dome. Particularly preferably, the switching dome has a shape which is formed so complementary to the inner contour of the dirt cap, so that an annular gap remains between the dirt cap and the molding. The annular gap is preferably so small is dimensioned that coarse dirt particles can not enter through the annular gap and can get in the direction of the passage opening. Particularly preferably, the simple width of the annular gap is less than 2 millimeters, preferably less than 1 millimeter.

Particularly preferably, the dirt cap is designed as a metal cap and / or the engagement portion as a metal sliding portion. The dirt cap is implemented in the metal version as a permanent component that is sufficiently rigid to transmit the Wählbewegungen the selector lever on the shift shaft, so that the functionality is also permanently secured. Due to the formation of the engagement portion as a metal sliding portion of this can be particularly simple on the main body of the selector lever, z. B. via caulking, press-fitting, etc. are set. By arranged between the metal sliding portion and metal cap plastic insert these two metal components are separated, which is advantageous in terms of noise and the risk of corrosion.

In a preferred embodiment of the invention, the actuating device also comprises a shift lever, which is designed for pivoting the shift shaft about the main axis. The shift lever, for example, rotatably connected to the shift shaft.

Another object of the invention relates to a change gear, in particular a gearbox, for a vehicle having an actuating device, as described above or according to one of the preceding claims.

Further features, advantages and effects 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 three-dimensional representation of an actuator for a change gear of a vehicle as a first embodiment of the invention;

2 a detail from the 1 in a partially sectioned illustration;

3 a schematic three-dimensional representation of a plastic insert for the actuator in the 1 and 2 ;

4 a detail section of the actuator in the 1 in longitudinal section.

The 1 shows an actuating device in a schematic three-dimensional representation 1 for a change gear of a vehicle as an embodiment of the invention.

The actuating device 1 includes a housing portion 2 a switching dome, which can be placed on a transmission housing of the vehicle and bolted, for example. The switching dome or the housing section 2 is formed in this example as a casting, but can also be made differently. The housing section 2 is from a shift shaft 3 penetrated, which defines a main axis H with its pivot axis or longitudinal extent. On the shift shaft 3 are exemplary switching sleeves 4a , b rotatably mounted, which in this example in each case a shift finger 5a , b. The shift fingers 5a , b serve to initiate switching movements in the change gear. The actuating device 1 serves to implement switching and Wählbewegungen which are initiated manually by a driver or controlled by an actuator to implement.

The section of the selector shaft 3 with the switching sleeves 4a , b are disposed within a gear room G and in a lubricating oil atmosphere. The housing section 2 forms a boundary to the exterior space A, for example to the engine compartment of the vehicle. At the projecting in the outer space A portion of the shift shaft 3 are a selector lever 6 and a shift lever 7 arranged. The selector lever 6 is formed, a selection movement in an axial displacement of the shift shaft 3 along the main axis H implement. The shifter 7 is formed, a switching movement in a pivoting movement of the switching shaft 3 to implement the main axis H.

The shifter 7 is designed as a straight lever from a straight sheet metal section as a base body and with its one end via a shaft nut 8th that is on the selector shaft 3 is screwed on, with the switching shaft 3 rotatably connected at the free end. At the other end, the shift lever 7 a ball stud 9 as a mechanical interface for connection of a cable or a gearbox to initiate the switching movement.

The selector lever 6 is formed as an angled lever on an angled sheet metal portion and is in a pivoting range 10 pivotable relative to the housing portion 2 stored. For example, the selector lever 6 the swivel range 10 around a bolt 11 pivot in the housing section 2 is fixed, or together with the bolt 11 pivot, with the bolt 11 is pivotally received in the housing portion. The selector lever 6 has one actuating arm 12 and an intervention arm 13 on which are angled at an angle of 80 degrees to each other. The actuating arm 12 has a ball stud 14 on, in the same way as the ball stud 7 can be coupled with a cable or a linkage for the transmission of Wählbewegungen. By an actuation of the actuating arm 12 becomes the selector lever 6 around the swivel range 10 , in particular the bolt 11 , pivoted and thus the intervention arm 13 emotional.

The intervention arm 13 has a vertically projecting from this engaging portion 15 on which the selection movement of the selector lever 6 in the direction of the switching shaft 3 transfers. The engaging section 15 is formed in this example as a metal sliding portion, which with the actuating arm 13 is connected via a positive and / or non-positive and non-material in this example connection. Preferably, the compound is formed as a forming compound, which was prepared exclusively by a forming process. The engaging section 15 is aligned in the radial direction to the main axis of rotation H and extends perpendicular to the engagement arm 13 ,

As an engagement receptacle, the fastening device 1 a cap 16 which is designed as a dirt cap. The cap 16 is cup-shaped and has a hollow cylindrical outer portion which in the direction of the housing portion 2 is open. The housing section 2 has a cylindrical shape 17 on top of that the cap 16 is placed in such a way that between cap 16 and shaping 17 results in an annular gap, which is formed as a sealing gap. Through the interaction of the shape 17 and the cap 16 it is ensured that no coarse dirt from the outer space A in the direction of the switching shaft 3 can penetrate. The cap 16 is with the selector shaft 3 slidably fixed in the axial direction and also rotatably arranged in the direction of rotation about the main axis H. The shift-resistant connection can be achieved by the cap 16 on the shift shaft 3 with the shaft nut 8th is screwed on. The rotation in the circumferential direction can be achieved by the cap 16 a non-rotationally symmetric recess and the switching shaft 3 has a complementary designed non-rotationally symmetrical shaft portion (not shown), so that a positive rotation is given. The height of the cap 16 in the axial direction and the shaping 17 are sized to the cap 16 collision-free through the selector lever 6 together with the stem 3 can be moved, but always in the radial direction with the shape 17 overlaps to implement their dirt protection or sealing function.

How in particular in conjunction with the 2 indicates the area of the actuator 1 in the outer space A in partially sectioned three-dimensional representation shows is in the cap 16 a window area 18 introduced, which as a through hole or recess in the cap 16 is realized. The window area 18 includes a - in unwinding the cap 16 viewed - rectangular area, which extends along a height with respect to the main axis H in the circumferential direction. In the window area 18 is a plastic insert 19 arranged, which has a groove 20 for the engaging section 15 forms. The plastic insert 19 covers and seals the window area 18 over the entire surface, so that no dirt particles can penetrate. In the coarse form, this is the radius of the cap 16 bent formed.

Like in the 3 it can be seen that the plastic insert 19 shows in three-dimensional representation, the plastic insert points 19 a marginal and in this example circulating support area 21 on, the surface on the outer surface of the cap 16 rests. As a backup in the opposite direction includes the plastic insert 19 snap hooks 22 , which in the installed state on the inner circumferential surface of the cap 16 matingly fit, so that the plastic insert 19 is secured captive.

The length of the groove 20 in the direction of rotation about the main axis of rotation H is such that, on the one hand, the switching movements by the shift lever 7 and the associated rotation of the shift shaft 3 as well as the cap 16 can be implemented without collision and on the other, that in addition by the selection movement of the engaging portion 15 required in the direction of circulation is given.

As can be seen in particular from the 4 results in a schematic longitudinal section through the actuator 1 shows forms the plastic insert 19 raceways 23a , b off, at which the engaging portion 15 runs along. The raceways 23a , b lie in the axial direction to the main axis H overlapping or congruent with edges 24a , b of the window area 18 so that the engagement section 15 positive fit over the plastic insert 19 through the edges 24a , b is supported.

Upon actuation of the selector lever 6 becomes the intervention arm 13 around the swivel range 10 pivoted so that the engaging portion 15 is offset in height in a semicircular path with respect to the major axis H. The engaging section 15 runs on the raceways 23a respectively 23b and move the cap 16 in the axial direction. After the shift shaft 3 with the cap 16 is firmly connected by the movement of the cap 16 in the same way, the switching shaft 3 in shifted in the axial direction, so that the selection movement on the shift shaft 3 is transferred.

The engaging section 15 is formed as a metal sliding portion. In addition, the cap 16 realized as a metal cap. However, these two components are due to the separation through the plastic insert 19 arranged contactless to each other. This separation has the advantage that no metallic rattle by contacting of engaging portion 15 and cap 16 can occur. In addition, the engagement section runs 15 only on the plastic section 19 from, so no abrasion of the engaging portion 15 is to be expected. In particular, a corrosion-inhibiting coating of the engagement portion 15 and the cap 16 Protected, so that a possible corrosion of these components is precautionary prevented.

LIST OF REFERENCE NUMBERS

1

actuator

2

housing section

3

shift shaft

4a, b

switching sleeves

5a, b

shift finger

6

selector lever

7

gear lever

8th

shaft nut

9

ball pin

10

swivel range

11

bolt

12

actuating arm

13

engagement arm

14

ball pin

15

engaging portion

16

cap

17

formation

18

pane

19

Plastic insert

20

groove

21

support area

22

snap hooks

23a, b

raceways

24a, b

edge

A

outer space

G

Transmission interior space

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

• DE 102007045654 A1 [0003]

Claims (10)

Actuating device ( 1 ) for a change gear of a motor vehicle with a shift shaft ( 3 ), wherein the shift shaft ( 3 ) defines a main axis (H), with a housing portion ( 2 ), wherein the shift shaft ( 3 ) through the housing section ( 2 ), with a cap ( 16 ), the cap ( 16 ) axially displaceable on the shift shaft ( 3 ) is arranged with a selector lever ( 6 ) for shifting the shift shaft ( 3 ) in the axial direction of the main axis (H), wherein the selector lever ( 6 ) a swivel range ( 10 ) to which the selector lever ( 6 ) relative to the housing portion ( 2 ) is pivotable, an actuating arm ( 12 ), over which the selector lever ( 6 ) is operable, and an engagement arm ( 13 ) comprising an engaging portion ( 15 ), wherein the engagement arm ( 13 ) is formed, with the engaging portion ( 15 ) in the cap ( 16 ) intervene to the shift shaft ( 3 ) in the axial direction, characterized in that the cap ( 16 ) a window area ( 18 ) into which the engagement section ( 15 ) intervenes. Actuating device ( 1 ) according to claim 1, characterized in that the window area ( 18 ) as a through hole in the cap ( 16 ) is trained. Actuating device ( 1 ) according to one of the preceding claims, characterized in that the engagement section ( 13 ) is formed as a sliding portion or as a roller. Actuating device ( 1 ) according to one of the preceding claims, characterized by a plastic insert ( 19 ), wherein the plastic insert ( 19 ) in the window area ( 18 ) is inserted or disposed, wherein the plastic insert ( 19 ) at least one career ( 23a , b) for the engaging section ( 15 ) having. Actuating device ( 1 ) according to claim 4, characterized in that the plastic insert ( 19 ) over the run length of the at least one career ( 23a , b) on one edge ( 24a , b) the window area ( 18 ) is positively supported. Actuating device ( 1 ) according to one of claims 4 or 5, characterized in that the plastic insert ( 19 ) two raceways ( 23a , b), wherein the raceways are parallel to each other and / or a groove ( 20 ) form. Actuating device ( 1 ) according to one of the preceding claims, characterized in that the housing section ( 2 ) as a section of a switching dome ( 2 ) and the cap ( 15 ) as a dirt cap for covering a passage opening for the switching shaft ( 3 ) in the switching dome ( 2 ) is trained. Actuating device ( 1 ) according to one of the preceding claims, characterized by a shift lever ( 7 ) for the pivoting of the switching shaft ( 3 ) around the main axis (H). Actuating device ( 1 ) according to one of the preceding claims, characterized in that the cap ( 16 ) and / or the engagement section ( 15 ) is formed of metal. Change gearbox for a vehicle, characterized by an actuating device ( 1 ) according to any one of the preceding claims.

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