WO2015007612A1

WO2015007612A1 - Shifting device for shifting a multi-clutch transmission

Info

Publication number: WO2015007612A1
Application number: PCT/EP2014/064838
Authority: WO
Inventors: Uwe BORN; Wolfgang CLAESSEN; Frank FÖHRDES
Original assignee: Egon Grosshaus Gmbh & Co. Kg
Priority date: 2013-07-17
Filing date: 2014-07-10
Publication date: 2015-01-22
Also published as: DE202013103202U1

Abstract

The invention relates to a shifting device 1 for shifting a multi-clutch transmission with multiple selector forks 3, 3.1. Each selector fork 3, 3.1 sits on slides 4, 4.1 which can be adjusted on a common shift rod 2 in a translational manner. The shifting device 1 comprises an actuator paired with each slide 4, 4.1 in order to move the slides 4, 4.1, said actuator being designed as an actuating piston 22 which is guided in a cylinder housing 6, 6.1 with a longitudinal axis that is parallel to the longitudinal axis of the shift rod 2 and which can be moved in at least one shifting direction by an actuating fluid. Each actuating piston 22 together with the paired slide 4, 4.1 is paired with a connecting follower 19 which has a latching contour 18 running in the movement direction of the follower 19 on each piston-side end of the follower as a respective first part of a latch 11, said first latch part acting against a spring-loaded latch roller 15, as a respective second latch 11 part, which is held by the respective cylinder housing 6, 6.1. The axle 16 of the latch roller 15 and/or the latch roller 15 itself is mounted in a bearing 24 provided by the at least one spring element 17 which supplies a spring load on the latch roller 15.

Description

Switching device for switching a multi-clutch transmission

The invention relates to a switching device for switching a multi-clutch transmission with a plurality of shift forks, which shift forks each sit on a common shift rod on a common slide, with a carriage associated with each actuator for moving the carriage, as executed in a longitudinal axis parallel to the longitudinal axis of the shift rod arranged cylinder housing guided, movable in at least one switching direction by a control fluid actuator piston and with each actuator piston with the associated carriage associated driver, which drivers carry at their piston ends each one running in the direction of movement of the driver latching contour respectively as the first part of a detent, against one held by the respective cylinder housing, spring-loaded detent roller act as each second part of the detent.

Such switching devices are used, for example, for switching of group transmissions. The at least two shift forks each serve to shift different gears of the transmission. The shift forks themselves are kept adjustable on a shift rod. Each shift fork is carried by a carriage, which is guided and supported on the shift rod. Sleigh serve according to a prior art embodiment sleeve-shaped body, which are supported with the interposition of a bearing on the shift rod. On the outside of such a sleeve-shaped carriage, a holder with two arms is arranged. The unidirectional faces of the two arms serve as abutment surfaces for a shift fork which is welded to these arms. To move each carriage is an actuator, which is typically a piston-cylinder assembly. In a prior art embodiment, each actuator piston is guided in a separate cylinder of metal. Two such metal cylinders are connected by a plastic intermediate tube. This plastic intermediate tube carries Stellfluid acted connections. Other connections are arranged on the plastic intermediate tube opposite end faces of the actuator piston bearing cylinder. Thus, depending on the direction of its Stellfluidbeaufschla- move in one or the other direction. In this respect, the adjusting pistons are double-acting pistons. Such a control piston has two piston ends, which are each sealed against the inner wall of the cylinder housing portion. The section located between the ends of such an actuating piston serves to connect a driver with which the movement of the actuating piston is transmitted to the carriage assigned to it. The axis of movement of the actuating piston is aligned parallel to the longitudinal axis of the carriage bearing control rod. Since the driver is a rigid component, typically a metal component, the carriage connected thereto is moved as the actuator piston within its cylinder housing.

Such a switching device is known from DE 10 2009 031 731 B3. The operating positions of the shift forks are defined by a respective detent. The stator-side component of the detent is inserted by means of its Rastierungsrahmens in a cylinder housing opening of the cylinder housing. This component comprises a spring-loaded detent roller. With this part of the detent acting at the pointing to the actuator piston end of the driver locking contour cooperates. If such a shift fork are placed in two switching positions, the locking contour is formed wavy, with a neutral position is provided between the two operating positions. This is formed by a concave contour into which the detent roller engages due to its spring load. The spring load in the case of the detent known from this document results from two in the direction of movement of the driver with spaced apart leg springs, which are supported in each case with two legs on both sides of the detent roller on the axis carrying the detent roller. Mounted is the axis of the detent roller in the Rastierungsrahmen in which also the leg springs are held. The Rastierungsrahmen is a plastic part. The axis of the detent roller is mounted in oblong holes, introduced into the longitudinal sides of Rastierungsrahmens. The alignment of the elongated holes runs in the spring-loaded direction of the detent roller. Although the detent is in an oil environment, wear in the bearing openings in the plastic Rastierungsrahmen produced by the axis of the detent rollers can not be prevented. The consequence is that especially in direction of movement of the driver, so: in the transverse direction to the compression direction of the detent roller, the inside diameter of the slots used as a bearing increases and therefore the high dimensional accuracy provided positions of the driver with its locking contour no longer meets the requirements.

Based on this discussed prior art, the invention is therefore the object of developing a switching device of the type mentioned in such a way that the storage of the detent roller or its axis against wear is improved.

This object is achieved according to the invention by an aforementioned generic switching device, in which the axis of the detent roller and / or the detent roller itself is mounted in a provided by at least one spring loading of the detent roller spring bearing provided.

In this switching device, the axis of the detent roller and / or the detent roller itself in the direction of loading of the bearing and thus in the spring deflection of the detent roller and transverse direction thereto, ie: stored in the direction of movement of the driver in a provided by the at least one spring element bearing itself. Thus, in this detent for the storage of the detent roller or its axis or those elements used, which are also provided for the provision of the spring load. Since this is for example made of spring steel spring elements, the bearing pair is formed at such a detent by two metal parts. Also, the detent roller and its axis are typically metal parts. The bearing provided by the at least one spring element bearing is yielding in the spring-loaded direction of the latching roller, but is stationary in the transverse direction thereto and thus in the direction of movement of the latching contour of the driver moved past the latching roller. For this purpose, the at least one spring element is held supported appropriately in the Rastierungsrahmen.

The peculiarity of the above-described concept is that the detent frame no longer has to have a bearing function, which is why it can still be designed as a plastic part. Rather, used in this detent the particular material properties of the spring elements used or to provide these not only the function of providing a force acting on the detent roller bias, but also provide the necessary storage for its storage.

According to one embodiment, the axis of the detent roller engages with its two ends in a retaining groove of Rastierungsrahmens. This retaining groove is closed in the direction of the driver, but open in the opposite direction. However, the closure of these grooves is not used for storage, but the purpose of keeping the detent roller or the axis with the detent roller in the Rastierungsrahmen despite spring load when the detent roller is not supported on the detent contour of the driver. In this respect, this closure is not subject to wear, in particular no deterioration of the operating positions of the driver wear.

In a preferred embodiment it is provided that a shaped spring band is used for spring loading of the detent roller. In contrast to previously known, serving for a spring load of the detent roller, produced by a wind process leg springs this may be a formed from a spring steel sheet band section. This not only brings about a simplification in production, but also assembly advantages. Moreover, in such an embodiment, the bearing portion is not provided merely by the line contact of a round wire, but by a surface contact. Such a design also brings with it cost advantages, since the production of a correspondingly shaped spring band from a metal plate, typically spring steel, is quicker and cheaper to produce. In addition, in such an embodiment of the spring elements readily corresponding to the respective requirements and adapted to specific circumstances supporting contours are formed. In such a spring band is provided to provide two spring portions, between which a bearing forming bearing portion is arranged as an integral part of the spring band, so that ultimately a single element, in the form of a shaped spring band is needed and to assemble. The spring sections are in the transverse direction to the longitudinal extension of the spring band and thus compliant in the jounce direction. The spring band is supported with its longitudinally pointing ends on the cylinder housing, either directly or with the interposition of a Rastierungsrah- men. In the cylinder housing opening or the Rastierungsgehäuse such a spring band is free of play in the direction of movement of the driver, suitably held even standing under a certain bias. The actual bearing can be realized by a U-shaped or bow-shaped design of the bearing portion, in which bearing receptacle the axis of the detent roller and / or the detent roller itself engages and is held backlash transversely to the compression direction. At the same time a further part of the bearing section acts on the axis of the detent roller or the detent roller itself to provide the desired spring preload for the detent.

The two separated by the bearing portion spring portions of such a spring band produced as a spring element are S-shaped according to an embodiment for providing the Einfedervorspannung. These then each form a compression portion of the spring band.

Preferred is an embodiment in which the spring band comprises two mutually parallel spring band parts, each having a bearing portion and two spring portions, so that in each case such a spring band part is arranged to support the axis of the detent roller on both sides of the detent roller. The spring band parts are preferably brought together at their support end areas to ensure the integrity of such a spring band. Thus, located between the two spring band parts provided for receiving the detent roller franking.

To support such a spring band within, for example, a Rastierungsrahmens in the direction of movement of the driver, in each case a U-shaped support contour is formed on the respective ends of the spring sections according to an embodiment. It is provided that the open side of this U-shaped support contour facing upward. The free leg of this support contour is used for engaging behind an integrally formed on the Rastierungsrahmen as retaining projection Locking lug.

The formation of a U-shaped bearing portion for supporting the axis of the detent roller or the detent roller itself allows a not inconsiderable simplification in the assembly. Finally, then the insertion of an axle through the side walls of the Rastierungsrahmens through what is necessary in prior art detent not required. Thus, the relevant side parts of Rastierungsrahmens need not be accessible for assembly. Therefore, it is not necessary in this embodiment, first to provide a Rastierungsmodul, which is to be mounted in or on the cylinder housing. Rather, this embodiment of the detent allows an embodiment in which the Rastierungsrahmen is an integral part of the cylinder housing. If the cylinder housing is a plastic part, it makes sense to form the Rastierungsrahmen together with the cylinder housing itself, thus in a single Urformschritt.

The invention is described below with reference to an embodiment with reference to the accompanying figures. Show it:

1 is a perspective view of a switching device with a

Rastierung for switching a multi-clutch transmission,

2 shows a perspective detailed view of a detent of the switching device of Figure 1,

3 shows a longitudinal sectional view through the detent of Figure 2,

Fig. 4: a perspective view of individual parts of the detent of the switching device of the preceding figures in the manner of an exploded view and

Fig. 5: the parts of the detent of Figure 4 in its assembled position.

A switching device 1 is used for switching a multi-clutch transmission. The switching device 1 has a shift rod 2. In the illustrated embodiment, this is designed as a cylinder rod made of a suitable metal. The shift rod 2 forms the guide for two, each a shift fork 3, 3.1 carrying carriage 4, 4.1. The slides 4, 4.1 are translationally adjustable in the direction of the longitudinal axis of the shift rod 2 on this.

For actuating each carriage 4, 4.1 each serves a piston-cylinder arrangement. The actuator tube 5 has two cylinder housing sections 6, 6.1, in each of which a control piston is arranged to be adjustable in the direction of the longitudinal axis of the actuator tube 5. Between the two cylinder sections 6, 6.1 there is an intermediate pipe section 7 with connections 8, 8.1 as part of the integrally manufactured actuator pipe 5. The piston-cylinder units are operated in the illustrated embodiment with a hydraulic fluid as actuating fluid, typically a hydraulic oil. Between the ports 8, 8.1 is located within the Aktorrohres 5 a partition to separate the cylinder housing section 6 of the cylinder housing section 6.1. The front ends 9, 9.1 of the Aktorrohrs 5 form the other connections for the cylinder housing sections 6, 6.1. Thus, the actuating piston located in the cylinder housing section 6 can be adjusted in one direction or the other via the connections 8 and 9, depending on the pressurization of the connection 8 or of the connection 9. The same applies to the located in the cylinder section 6.1 actuator piston for this purpose, the connections 8.1 and 9.1 Stellfluid be acted upon.

As already mentioned, the adjusting pistons located in the cylinder housing sections 6, 6.1 serve as actuators for adjusting the carriage 4, 4.1 associated with the respective adjusting piston. To transmit the movement of the actuating piston is a led out of the actuator tube 5 driver, which is connected between the two piston ends of the actuating piston 22 at its translational movement. The driver is led out of the actuator tube 5 through a driver window. The driver window is located on the side facing the carriage 4, 4.1 side of the Aktorrohrs 5. Each actuator piston or each connected to this and out of the actuator tube 5 driver is assigned a detent. This is in each case closed by a cover 10, 10.1.

Figure 2 shows the located below the lid 10 detent 1 1. The following statements with respect to the detent 1 1 apply equally to the located on the cylinder housing section 6.1 below the lid 10.1 detent. Part of the detent 1 1 is an integrally produced with the actuator tube 5 Rastierungsrahmen 12. The Rastie- tion frame 12 has two parallel to the direction of movement of the driver extending longitudinal sides 13, 13.1 and two transverse thereto transverse sides 14, 14.1. Within the Rastierungsrah- mens 12 is a detent roller 15, by means of a force acting on its axis 16 spring element 17. The spring element 17 is held in the direction of the longitudinal extension of the longitudinal sides 13, 13.1 backlash between the transverse sides 14, 14.1, as this from the Sectional view of Figure 3 can be seen. The latching roller 15 acts against a latching contour 18 at the front end of the driver 19 shown with its piston-side connection (see FIG. The recess contour 18 is wave-shaped and has a convex-shaped, the neutral position of the shift fork 3 and the driver 19 defining recess 20. The recess 20 is bounded on both sides in the direction of movement of the driver 19 by a locking bead 21, 21 .1. To move the shift fork 3 by actuation of the actuating piston 22, starting from the neutral position shown in Figure 3, the detent roller 15 is brought out of the recess 20. The detent roller 15 acts with bias by the spring element 17 in the direction of the detent contour 18 of the driver 19. Thus, the detent roller 15 is guided against the force of the spring element 17 via the locking bead 21 or 21 .1 when the adjustment position of the actuating piston 20 when leaving the neutral position shall be. The same applies vice versa, when the shift fork 3 is in one of its other positions and in the neutral position, as shown in Figure 3, to be moved back.

The spring element 17 of the illustrated embodiment is a stamped and bent part made of a spring steel sheet. In the direction of movement of the driver 19, the spring element 17 is supported on the transverse sides 14, 14.1 without play and under a low bias from standing. The axis 16 of the detent roller 15 engages with her respective end in a in the longitudinal sides 13, 13.1 introduced retaining groove 23 and 23.1 of Rastierungsrahmens 12 a. The retaining grooves 23, 23.1 are open toward the outside in the direction of the cover 10, but are closed in the other direction. In this way, the detent roller 15 is also held with its axis 16 on the detent frame 12 when the detent roller 15 is not supported on the detent contour 18 of the driver 19. However, a bearing function is not the retaining grooves 23, 23.1 and provided in the direction of the locking contour 18 of the driver 19 closure.

The structure of the detent 1 1 is explained below with reference to Figures 4 and 5. The driver 19 has, as already described, on the locking contour 18, which provides the first part of the detent 1 1. The spring-loaded detent roller 15 is the second part of the detent 1 1, namely the stationary in relation to the movement of the driver 19 relative to the detent roller 15. This purpose is the Rastierungsrahmen 12 and the detent roller 15 holding spring element 17. The for detent The detent roller 15 is supported at its two sides on its axis 16. The spring element 17 designed as a spring band has two spring sections 25, 25.1 which are separated from each other by a bearing section 24. The spring portions 25, 25.1 are used to apply the required bias, with which the detent roller 15 acts against the locking contour 18 of the driver 19. Consequently, the spring portions 25, 25.1 resiliently yielding in the springing direction. In the illustrated embodiment, the spring element 17 is made in one piece and comprises two spring band parts 26, 26.1. These are spaced apart by a franking 27. The franking 27 serves to receive the latching roller 15. The spring strip parts 26, 26.1 are brought together at their longitudinal ends, at each of which ends a U-shaped support contour 28, 28.1 is formed. The Abstützkonturen 28, 28.1 are designed by the driver 19 groundbreaking open. The ends of the free limbs of the support contours 28, 28.1 engage behind a respective latching lug 29, 29.1 formed on the inside of the transverse sides 14, 14.1 (see Figures 2 and 3).

The spring band parts 26, 26.1 are in each spring section 25, 25.1 S- Shaped. The located between the spring portions 25, 25.1 bearing portion 24 is U-shaped, wherein the opening of this formation in the direction of the driver 19 has. By this U-shaped configuration of the bearing portion 24, wherein the inner radius of this formation corresponds to the outer radius of the axis 16, serves to receive the axis 16 of the detent roller 15, which is then stored in this configuration. The axis 16 is supported in the direction of movement of the driver 19 and thus transversely to the compression direction on the two legs 30, 30.1 of the bearing portion 24 from. The two legs 30, 30.1 are connected by a connecting them bracket 24.1 to form the above-described U-shape. Since the spring element 17 in the direction of movement of the driver 19 and thus in the direction of the longitudinal extent of the longitudinal sides 13, 13.1 of the Rastierungsrahmens 12 is not yielding, this is an effective storage and management of the axis 16 of the detent roller 15 given. The axis 16 is as well as the detent roller 15 made of a steel material. Therefore, the cooperating partners of the storage, especially there in an oil environment, quasi wear-free.

The bearing portion 24 is connected by straight portions of the spring band portions 26, 26.1 to the spring portions 25, 25.1 comprehensive S-shaped compression portions.

An assembly of in relation to the movement of the driver 19 stationary parts of the detent 1 1 - the spring element 17 and the detent roller 15 with its axis 16 - can be done in a simple manner. The detent roller 15 is inserted with its axis 16 in the retaining grooves 23, 23.1. Subsequently, the spring element 17 is mounted with one of its two Abstützkonturen 28 or 28.1 under a latch 29 or 29.1. The other end of the spring element 17 is then pivoted in the direction of the Rastierungs- frame 12 until the other Abstützkontur 28.1 and 28 engages under the other locking lug 29.1 and 29 respectively. Such an assembly can also take place in the case of a detent frame integrally formed on the respective cylinder section.

Although the invention is described with reference to the described embodiment using a shaped spring band, this can also be realized with coiled springs. The storage cut can then be provided by a turn or even a partial turn. Part of the above-described disclosure is also the detent described as such or only the Rastierungs- frame with the therein held by the at least one spring element detent roller.

LIST OF REFERENCE NUMBERS

1 switching device

2 shift rod

3, 3.1 shift fork

, 4.1 sled

5 actuator tube

6, 6.1 cylinder tube section

7 intermediate pipe piece

8, 8.1 Connection

9, 9.1 finish

, 10.1 Lid

1 1 detent

12 detent frame

, 13.1 Longitudinal side

, 14.1 Transverse side

15 locking roller

16 axis

17 spring element

18 locking contour

19 drivers

20 deepening

, 21 .1 Rastwulst

22 adjusting pistons

, 23.1 Holding groove

24 bearing section

24.1 Temple

, 25.1 Spring section

, 26.1 Spring band part

27 franking

, 28.1 Supporting contour

, 29.1 Latch

, 30.1 thighs

Claims

Patent claims

Switching device for switching a multi-clutch transmission with several shift forks (3, 3.1), which shift forks (3, 3.1) each sit on a slide (4, 4.1) which is translationally adjustable on a common shift rod (2), with each slide (4, 4.1) assigned actuator for moving the carriage (4, 4.1), designed as one with its longitudinal axis parallel to the longitudinal axis of the switching rod

(2) arranged cylinder housing (6, 6.1) guided actuating piston (22) which can be moved in at least one switching direction by an actuating fluid and with a driver (19) connecting each actuating piston (22) to the carriage (4, 4.1) assigned to it, which drivers (19) each carry at their piston-side ends a locking contour (18) running in the direction of movement of the driver (19) as the first part of a locking device (11), which is held against a spring-loaded locking roller (11) held by the respective cylinder housing (6, 6.1). 15) act as a second part of the detent (1 1), characterized in that the axis (16) of the detent roller (15) and / or the detent roller (15) itself in one by the at least one spring loading of the detent roller (15) serving spring element (17) is mounted in the bearing (24).

Switching device according to claim 1, characterized in that for the spring loading of such a locking roller (15), a shaped spring band (17) is provided, which has two spring sections that are spaced apart from one another by a bearing section (24) and deflect in the transverse direction to the longitudinal extent of the spring band (17). (25, 25.1), each spring section (25, 25.1) being supported on the cylinder housing (6, 6.1) at its end pointing away from the other spring section (25.1, 25) and the bearing section (25, 25.1) located between the spring sections (25, 25.1). 24) comprises a bracket (24.1) which surrounds the axis (16) of the locking roller (15) at least in some areas in the spring direction.

3. Switching device according to claim 1 or 2, characterized net that the spring sections have an S-shaped spring section.

Switching device according to one of claims 1 to 3, characterized in that the spring band (17) is designed to be split and has a clearance (27) located between two spring band parts (26, 26.1) as a locking roller receptacle, which two spring band parts (26, 26.1) are used for training a common end support on the cylinder housing (6, 6.1) are brought together.

Switching device according to claim 4, characterized in that the spring band parts (26, 26.1) are separated in the S-shaped spring sections.

Switching device according to one of claims 1 to 5, characterized in that to support the end of the spring band (17), the spring sections (25, 25.1) have a U-shaped support contour (28, 28.1), the open side of which is supported by the locking contour (18) of the Driver (19) points away.

Switching device according to claim 6, characterized in that the spring sections (25, 25.1) are supported on a locking frame (12) surrounding a cylinder housing opening with inwardly projecting holding projections (29, 29.1) at the transverse ends.

Switching device according to claim 7, characterized in that the locking frame (12) is part of the cylinder housing (6, 6.1).

Switching device according to one of claims 1 to 8, characterized in that the actuating pistons (22) are arranged in a common actuator tube (5) and two cylinder housing sections (6, 6.1) of the actuator tube (5), in each of which an actuating piston (22) is guided is separated by an intermediate connecting pipe piece (7) of the actuator pipe (5) with connections (8, 8.1) which can be acted upon by adjusting fluid are.

Switching device according to claim 9 with reference to claim 7, characterized in that the actuator tube (5) is a plastic tube and the locking frames (1 1) are made in one piece with the actuator tube (5).