DE19960194A1 - Gear selection system includes set of three springs acting on selector shaft and stop and disk unit subordinate to axial movement of pre-tensioner. - Google Patents

Abstract

In the neutral position the pre-tensioner (4) is pre-clamped to a guide element (3) by the second spring (8) as opposed to the driver (10) which is pressed by the spring loaded (7) selector shaft (2) onto the pre-tensioner (4) in the opposite direction. A further spring (9) loads the stop disk (6) onto the endstop in the same way as the pre-tensioner. In the first selection position the shaft (2) pre-cocks the spring (7) so this urges the pre-tensioner axially away from the disk (6) on the guide element (3). Disk (6) is loaded onto the stop (5) by the spring (9). In the second selection position the pre-tensioner (4) is moved axially free from the guide and so against the spring (7) towards the disk (6) which in turn is loaded by spring onto the stop (5) opposite to the pre-tensioner (4).

Description

Field of the Invention

The invention relates to a device for generating restoring forces or increased dialing forces on a selector shaft, in which the selector shaft from a Neutral position at least axially in one direction against the counter stood at least a first resilient element in at least a first Dial position or in the opposite direction at least against the Wi derstand at least a second resilient element in a second choice position and axially beyond the second selection position at least partially against a common resistance of the second resilient element such as at least one further resilient element in a second choice position adjacent third selection position is movably arranged.

Background of the Invention

Such devices are mounted with shift shafts that are axially displaceable and pivotable, in particular in or on manual transmissions for motor vehicles  are arranged. During switching operations, the selector shaft is axially ent speaking selection position shifted and then to the choice of gears pivoted about its longitudinal axis. The moves from the dialing positions Spring shaft automatically returns to a neutral position. The Neutral position is usually also a dial position from which to Swiveling the control shaft in one or the other swivel direction mostly the first and second gear are selected.

The other selector positions are shifted axially shaft from the neutral position in one or the other axial direction of the neutral position taken away by the shift shaft. These are the ones and second selection position, from which the further forward gears like the third and fourth as well as fifth and also a sixth course through Schwen ken of the control shaft are selectable. It also has a third dialing po reverse gear selectable.

The third selection position is by shifting the selector shaft from neutral position beyond the second dialing position. The operator should be signaled before choosing the reverse gear that it is about to start to choose the reverse gear. This signal is short-term and temporary increase in the shifting force of the selector shaft. For The selector shaft must be precise and comfortable switching after the signal be operated again with normal operating force.

As mentioned above, the restoring forces are the shift shaft in the Return the neutral position and increase the shifting force, thanks to springy el generated. DE 37 04 928 C2 is a device according to the prior art described the technology in which the selector shaft in the neutral position two cylindrical screw fins arranged concentrically on the selector shaft held and the increase in displacement by a plate spring is generated. The coil springs are supported on a housing and we ken over a disc on a pin or Si attached to the selector shaft circlip. The disc spring is open in a groove in a housing bore  take as well as attached and acts on one end of the shift shaft. At the Controlling the selection positions for the forward gears only affects the Fe derkraft of the corresponding coil spring as a restoring force on the switching wave. However, if the selector shaft is in the selected position for the selection of the Moves in reverse, add the force of one of the coil springs and the force of the disc spring. By means of the spring identification of the disc spring, a Force curve achieved, which briefly rises to a peak value and then at Reach the selection position approximately to only the value of the spring force Coil spring falls off. It is characteristic of disc springs that the An rose and the subsequent drop in spring force only within a very short time Travel is to be realized. A disadvantage of the otherwise satisfied stel State of the art solution is still that their manuf tion is relatively expensive. So z. B. the holes and grooves for the inclusion of the resilient elements and securing elements in individual Operations are introduced. The assembly of the individual parts in the switch housing or gearbox is time consuming. This is particularly disadvantageous thee in the large-scale or mass production of such devices and gears. Often through prior art devices too much axial space is also required. The location of the individual elements is determined by the position of the grooves, the sum of the tolerances and can deviate strongly from the nominal size. The circuit will then be inaccurate.

Summary of the invention

The object of the invention is therefore to provide a device of the aforementioned type create, which avoids the disadvantages of the prior art and which in particular through a compact con that takes up little installation space structure and cost-effective production in mass production net.

This object is according to the invention with the features of the subject of Claim 1 solved. Except at least a first resilient element, ei Nem second resilient element and the further resilient element  the device according to the invention a guide element, a biasing element, a stop disc with spacers, an axially fixed stop and an axially fixed on the shift shaft driver.

The guide element is at least axially movable relative to the selector shaft firmly in both directions on z. B. a flange or on the housing of the switch device or the gear supported. The axial path of the pretension mentes is limited in one direction by the guide element. At Be movements of the selector shaft in the opposite direction from the neutral position in the second dialing position and beyond the second dialing position up to the third selection position, the biasing element is in by means of the driver axial direction entrained with the selector shaft. With these movements in the second or third selection position is the biasing element by means of a Control element in at least one guideway of the guide element guided. The biasing element follows the movements of the selector shaft the neutral position to the third selection position, but is the movement when Switching shaft ge in the first selection position by the guide element prevents. If the selector shaft is moved to the second or third selection position, the driver acts like a stop and takes the pretensioning element with it.

When the selector shaft is axially displaced into the first select position, it separates the driver of the axially on the guide element continues to move the first biasing element.

The driver can be designed as a simple stop or for example se combined as a shift finger and driver. Because of the gerin The cost of mass production is a deep-drawn sheet metal one Prefer carrier. Carriers designed in this way are preferred with egg Nem press fit attached to the shift shaft. The shift shaft therefore needs for the driver's seat not to be processed separately, and the seat of the driver is precisely positioned depending on the overall tolerance can be determined.  

The first resilient element is in the device according to the invention in the a direction at least axially on the biasing means at least and is supported in the opposite direction via the selector shaft. The second resilient element is in one direction on the biasing element and in the opposite direction at a location relatively to the shift shaft most point axially supported. This fixed point can be done by the guide element or through a wall of the housing of the switching device or Gear or the like can be formed. The further resilient element supports axially in one direction against an axially movable but around the Longitudinal axis of the switching shaft arranged in a torsion-proof manner and in the opposite direction relative to the shift shaft axially stationary. For there is a fixed stop as well as for supporting the second fe different elements.

In the neutral position of the selector shaft, the biasing element is by means of the second spring element in one direction axially against the guide element ment biased. The driver is in the opposite direction by means of the shift shaft biased by the first resilient element to the front clamping element pressed. The stop disk is located by means of the further Fe derelementes directional to the biasing element loaded on the stop on. To move the selector shaft from the neutral position in one direction, i.e. in Moving towards their first dial position is the resistance of the first to overcome resilient element. The first resilient element is supported thereby in the direction of movement of the control shaft on the through the guide ment axially held biasing element and acts in the opposite Direction to the shift shaft. The driver moves away in the axial direction from the biasing element.

If the selector shaft is in the first selection position, the first is spring-loaded Element preloaded by the control shaft and loads the preload element in the direction away from the stop disc and presses it axially against the guide element. The stop disc is still by means of further spring element loaded in the same direction to the biasing element  the attack. If the selector force on the selector shaft is no longer active, it moves Switch shaft by the restoring force of the first resilient element in the opposite direction until the driver is back on the front clamping element is present. The selector shaft is in the neutral position again.

When the selector shaft moves in the opposite direction from the Neutral position in the second dial position and over the second dial position up to the third selection position, the biasing element is constantly through Carriers taken along in this axial direction. The biasing element is featured by means of the second resilient element against the driver tense. Since the driver is fixed to the selector shaft, it is also the position of the biasing element relative to the selector shaft during this entire movement sequence. The first spring element is made of basically when the selector shaft moves to the second selection position and not active beyond the second dialing position.

In the second selection position, the biasing element is axially from the guide element and by means of the driver against the resistance of the second element moves in the direction of the stop disc. The stop disc is still with unchanged position by means of the additional Fe derelementes loaded in the opposite direction to the biasing element at the stop. If the selector force on the selector shaft ceases to apply, the pre-action takes effect clamping element by the restoring force of the second resilient element the driver on the selector shaft and moves it to its neutral position back. The biasing element is in the second selection position when moving and back from the second selection position to the neutral position of the selector shaft axially guided in the guideway by means of the control element.

When the selector shaft moves beyond the second selection position the biasing element axially against the spacers of the stop disc and thus against the resistance of the further resilient element. For Restoring force of the second resilient element is thus the restoring force of the added more resilient element. The operator is raised by  Dialer informed. The biasing element is in by means of the control element not only axially guided the guideway during this process, but is also pivoted relative to the spacers, until the spacers on the pivoting biasing means for axial freima meet. Due to the restoring force of the further resilient element then dip the spacers into the frankings. The additional The spring force of the further resilient element is therefore suddenly eliminated. In order to The additional actuation force by the operator is also suddenly eliminated son on the shift shaft and the switching process can under normal conditions continued, d. H. only spring against the restoring force of the second the element.

The biasing means is only against that in the third selection position second resilient element biased and the stop washer is like with the spacers in the clearances of the pretensioning device submerged. The stop washer is due to the additional spring element biased, back to the stop. The switching force on the Shift shaft, the shift shaft moves by the restoring force of the second resilient element in the direction of its neutral position. The preload element moves axially away from the stop disc against the guide element.

The resilient elements are preferably each to be provided as a spring, but can also be connected in parallel or in series as a spring assembly leads.

An embodiment of the invention provides that the first resilient element is supported on the selector shaft via a sleeve attached to the selector shaft. Such a sleeve can be produced in the simplest way without cutting from sheet metal and to be attached to the selector shaft by means of a press fit. Elaborate machining processes for the introduction, e.g. B. a groove for insertion a circlip are not necessary.  

Another embodiment of the invention provides that the first resilient Element is attached to the selector shaft via a sleeve attached to the selector shaft supports and the axial path of the shift shaft in one direction to the first Select position, by striking the sleeve on the biasing element be is bordered.

In a further embodiment of the invention, the first resilient element is the second resilient element and the further resilient element concentric to Switching shaft arranged compression springs.

A device according to the invention is inexpensive to manufacture if, like a further embodiment provides the guide element, the pretensioner ment and the stop are formed by forming from sheet metal. Such Parts can be carried out very material-saving and with low weight.

Another embodiment of the invention provides an inexpensive method of manufacture lende combination in which the first spring element, the second spring de element and the other resilient element by concentric to Switching shaft arranged compression springs are formed as well as the guide ment, the preload element and the stop concentric to the selector shaft arranged and formed by forming from sheet metal. Furthermore, these are first resilient element, the second resilient element, the further resilient Element, the biasing element and the third stop in the guide element added. The third stop is firmly on the guide element attached. The stop is, for example, by pressing or Fasten welding to the guide element. The control is standing on a collar of the biasing element. The biasing element is with this collar held radially in the guide element. The postage paid the collar of the biasing element are formed by punched holes. The The stop disc with the spacers is formed in one piece from sheet metal. there the spacers are preferably as from the sheet of the stop plate protruding axially angled tabs formed.  

Finally, with a further embodiment of the invention, a very compact and material-saving and inexpensive to produce variant of the device is provided. The main parts of the device are arranged concentrically nested to the selector shaft and have the following individual features:

• - The guide element is sleeve-shaped with one in its wall brought guideway and a radially inward he most board trained. Such a guide element is preferred drawn from sheet metal, the board through the punched-out bottom nes is formed essentially cylindrical drawn part. The leadership track is preferably inserted into the wall of the guide element punches. However, it is also conceivable to use the guideway as an extra ge finished part on the wall of the guide element inside or outside to put on.
• - The biasing element is cup-shaped with a cylindrical part and trained a collar. There is a hole in the bottom of the bowl brings. That is in the neutral position and in the first dial position Preload element axially at least partially from a bore in the guide tion element.
• - The control is on the collar of the biasing element in the form of a Flap formed. The biasing element is radial by means of the collar guided in the guide element. It is against unwanted twisting Biasing element by means of the control element in the guideway ge backs up. With axial movement, the biasing element is axially in the Guideway until the course of the guideway from the axia len direction deviates and the biasing element to a swivel force forces.  
• - The stop is sleeve-shaped and on the opposite set end attached to the first board in the guide element. The An impact has a radially inwardly directed second board, the arranged opposite the first board of the guide element is.
• - The stop disc is radial in the stop or in the guide element held and points axially in the direction with the spacers of the biasing element.
• - The guide element, the preload element and the stop disc are arranged concentrically to the selector shaft.
• - The first resilient element sits in the guide element and is as a first coil spring arranged concentrically to the selector shaft educated. The first coil spring is supported in one direction on the side of the bottom of the front facing the spacers clamping element and in the opposite direction over a sleeve se on the selector shaft.
• - The sleeve is preferably designed as a drawn part and sits with one cylindrical part firmly on the selector shaft. From the cylindrical part is a radially outward collar on which the screw ben spring axially abuts.
• - The second resilient element is ge by a second coil spring forms, arranged concentrically to the shift shaft and encompasses the first Coil spring radial. The second screw supports in one direction benfeder on the side of the Bo facing the spacers dens of the biasing element. In the opposite direction the second coil spring axially fixed to the direction of movement Switch shaft on z. B. a flange or on a wall of a Ge supported.  
• - The further resilient element is ge by a third coil spring forms and encompasses the second coil spring radially. The third screw benfeder clamps the stop disc axially in the direction of the stop in front. It is supported in one direction on the stop disc and in the other direction axially fixed to the direction of movement of the Shift shaft. The third coil spring is preferably supported from an axial disk received in the guide element. It is however, it is also conceivable that the third coil spring is like the second Coil spring supported on a flange or on a housing.

A Vorrich so composed of a sleeve and spring package tion takes up little space, especially in the axial direction. The most parts can be manufactured inexpensively from sheet metal. The entire device can be assembled as a pre-assembly unit. The position of the individual elements can be very precisely pressed or calibrated tunable.

Brief description of the drawing

The invention is explained below using an exemplary embodiment. Show it:

Fig. 1 shows an embodiment of an apparatus for generating restoring forces or elevated selection forces to a switching shaft, with the shift shaft in its neutral position, shown in section,

Fig. 2 shows the device of FIG. 1 with the switching shaft in the first select position,

Fig. 3 shows the apparatus according to Fig. 1, to the switching shaft in its second selection position,

Fig. 4 shows the device of FIG. 1 with the switching shaft in a position between the second and third selection position,

Fig. 5 shows the device of FIG. 1, with the selector shaft in its third selection position and

Fig. 6 shows a stop plate, a biasing element and a guide element of a device according to FIG. 1 freed from the other parts of the device.

Detailed description of the drawings

Fig. 1 to 5 show an embodiment of an apparatus 1 for generating restoring forces or elevated selection forces on a shift shaft 2. The device 1 consists of a guide element 3 , a biasing element 4 , a stop 5 , a stop disc 6 and resilient elements 7 , 8 , 9 . The cup-shaped biasing element 4 is guided with a collar 4 b in the guide element 3 . B on the collar 4 is a control c 4 formed integrally with the biasing member. 4 The control element 4 c engages in a guide track 3 a of the guide element 3 . The control element 4 c as well as the guide path 3 a in FIG. 6, once again clearly a representation of the items stop disc 6 and biasing member 4 and guide member 3. Through a hole in the bottom 4 a of the Vorspannelemen tes 4 , the switching shaft 2 is guided. A driver 10 is fastened on the selector shaft 2 . The first resilient element 7 is a helical spring arranged concentrically to the control shaft 2 and is supported in one direction on the bottom 4 a and in the opposite direction on an outwardly directed collar 11 a of a sleeve 11 . So that the driver 10 is stretched against the other side of the bottom 4 a of the biasing element 4 .

In Fig. 1, the control shaft 2 is shown in its neutral position. Tralposition in the New is the bias element 4 with its collar 4 b by means of the second resilient element 8 is biased in a board 3b of the guide element 3 in the axial direction. The second resilient element 8 is also formed as a screw benfeder and arranged concentrically to the control shaft 2 . The second resilient element 8 is supported in one direction on the bottom 4 a and in the opposite direction on a flange 12 only partially shown. The guide element 3 is secured axially and radially on the flange 12 . The further resilient element 9 is supported on an axial disk 13 and clamps the stop disk 6 axially against a flange 5 a of the stop 5 . The thrust washer 13 is located on the guide element 3 or directly on the flange 12 .

In FIG. 2, the switch shaft 2 is in its first select position and is moved to this position in the with the arrow marked a direction against the resistance of the first resilient element 7. The driver 10 has axially detached from the biasing element 4 . All other elements of the device 1 are in unchanged position.

The second selection position of the selector shaft 2 is shown in FIG. 3. For this purpose, the control shaft 2 was moved in the opposite direction indicated by the arrow. The biasing element 4 is spaced apart by the switching shaft 2 via the driver 10 to the board 3 b of the guide element 3 . The biasing member 4 is approximately c web in the Füh means of the control element 4 out a axially and rotationally. 3 The position and bias of the first resilient element 7 to the shift shaft and the sleeve 11 to the biasing element 4 correspond to those in the neutral position of the shift shaft 2nd

In FIG. 4, the shift shaft 2 is shown in a position in which it is between the second and third select position. The biasing element 4 is pushed through the switching shaft 2 , via the driver 10 and against the resistance of the second resilient element 8 , against spacers 6 a of the stop plate 6 and thereby axially guided in the guideway 3 a and slightly pivoted about the longitudinal central axis of the switching shaft 2 . The stop plate 6 is at the same time by means of the spacers 6 a ben against the resistance of the wide ren resilient element 9 in the direction of movement of the selector shaft 2 . The biasing element 4 pivots against the spacers 6 a until they meet clearances 14 on the biasing element 4 . The clearances 14 on the biasing element 4 are clearly shown again in Fig. 6. If the spacers 6 a meet the frankings 14 , these penetrate under the effect of the prestress of the further spring element 9 into the frankings 14 .

In FIG. 5, the shift shaft 2 is in its third select position. The spacers 6 a are immersed in the frankings 14 . The stop disc 6 is moved by the action of the further resilient element 9 in its initial position against the board 5 a of the stop 5 . The biasing element 4 is loaded by the bias of the second resilient element 8 .

reference numeral

1

contraption

2nd

Selector shaft

3rd

Guide element

3rd

a guideway

3rd

b first board

4th

Preloading element

4th

a floor

4th

b collar

4th

c control

5

attack

5

a second board

6

Stop disc

6

a spacer

7

first resilient element

8th

second resilient element

9

another resilient element

10th

Carrier

11

Sleeve

11

a collar facing outwards

12th

flange

13

Thrust washer

14

Frankings

Claims (7)

1. Device ( 1 ) for generating restoring forces or increased dialing forces on a selector shaft ( 2 ) in which

• -, The control shaft ( 2 ) from a neutral position at least axially optionally in one direction against the resistance of at least one first resilient element ( 7 ) in at least a first select position or in the opposite direction at least against the resistance of at least a second th resilient element ( 8 ) in a second selection position and axially beyond the second selection position at least partially against a common resistance of the second resilient element ( 8 ) and at least one further resilient element ( 9 ) in a third selection position adjacent to the second selection position,
• - At least the first resilient element ( 7 ), the second resilient element ( 8 ), the further resilient element ( 9 ), a guide element ( 3 ), a pre-tensioning element ( 4 ), a stop disc ( 6 ) with spacers ( 6 a) , an axially fixed stop ( 5 ) and an axially fixed on the selector shaft ( 2 ) arranged driver ( 10 ) form the device ( 1 ),
• - The guide element ( 3 ) relative to the selector shaft ( 2 ) is supported at least axially movement-resistant in both directions,
• - the axial travel of the prestressing element (4) in one direction is limited by the guide element (3) and the biasing member (4) at BEWE conditions of the switching shaft (2) in the opposite direction from the New tralposition in the second select position and the second selection position up to the third selection position by means of the driver ( 10 ) in the axial direction with the control shaft ( 2 ) and the pretensioning element ( 4 ) during axial movements in the opposite direction at least by means of a control element ( 4 c) in at least one Guideway ( 3 a) of the guide element ( 3 ) is guided,
• - The first resilient element ( 7 ) in one direction at least axially abuts the biasing element ( 4 ) and is supported in the opposite direction via the selector shaft ( 2 ),
• - The second resilient element ( 8 ) is axially immovably supported in one direction on the front clamping element ( 4 ) and in the opposite direction relative to the control shaft ( 2 ),
• - The further resilient element ( 9 ) is biased axially in one direction against an axially movable stop disk ( 6 ) which is arranged to rotate around the longitudinal axis of the selector shaft ( 2 ) and faces the biasing element,

in which

• - The biasing element ( 4 ) in the neutral position by means of the second Fe derelementes ( 8 ) axially biased in one direction on the Füh guiding element ( 3 ), the driver ( 10 ) via the spring element by means of the first Fe derenden element ( 7 ) biased switching shaft ( 2 ) in the opposite direction is pressed against the pretensioning element ( 4 ) and the stop disc ( 6 ) by means of the further spring element ( 9 ) bears against the stop ( 5 ) in the same direction as the pretensioning element ( 4 ),
• - The first resilient element ( 7 ) is biased in the first selection position by the control shaft ( 2 ),
• - said biasing member (4) at least by the first resilient element (7) at least axially in the direction that the stop plate (6) facing away direction charged to the guide member (3) and the stop disc (6) by means of the further spring element (9) in the same direction for Prestressing element ( 4 ) bear against the stop ( 5 ) when loaded,
• - said biasing member (4) during movement of the shift shaft (2) from the neutral position to the second select position and the second select position is also taken up to the third select position by means of the driver (10) in the axial direction,
• - said biasing member (4) in the second select position, axially from the Füh approximately element (3) free, against the resistance of the second resilient Ele mentes (7) in the direction of the stop plate (6) is moved and the in impact plate (6) by means of the further spring element ( 9 ) in the opposite direction to the biasing element is loaded against the stop ( 5 ),
• - The biasing element ( 4 ) with axial movement of the selector shaft ( 2 ) beyond the second selection position in the guideway ( 3 a) guided axially, against the resistance of the second resilient element ( 8 ), axially against the spacer ( 6 a) Stop disc ( 6 ) is biased, and the biasing element ( 4 ) at least as long by means of the deflected in the guideway ( 3 a) control elements ( 4 c) relative to the stop disc ( 6 ) and the further resilient element ( 9 ) by means of the the stop disc ( 6 ), which moves axially away from the stop ( 5 ), is biased until the spacers ( 6 a) on the pivoting biasing element ( 4 ), axially clearing ( 14 ), axially plunge into the clearing ( 14 ),

and where

• - the biasing member in the third select position against the second spring de member is biased (7) and the stop disc (6) with the Ab article holders (6 a) in the clearances (14) immersed as well as by means of the further spring element (9) in the opposite direction to the prestressing element ( 4 ) bears against the stop ( 5 ).

2. Device according to claim 1, wherein the first resilient element ( 7 ) is supported on the selector shaft ( 2 ) via a sleeve ( 11 ) fastened on the selector shaft ( 2 ). 3. The apparatus of claim 1, wherein the first resiliently supported element (7) extends over a mounted on the shifting shaft (2), sleeve (11) on the shifting shaft (2) and wherein the axial travel of the shift shaft (2) in a Rich device by striking the sleeve ( 11 ) on the biasing element ( 4 ) be limited. 4. The device according to claim 1, wherein the first resilient element ( 7 ), the second resilient element ( 8 ) and the further resilient element ( 9 ) are each formed by at least one compression spring arranged concentrically to the control shaft ( 2 ). 5. The device according to claim 1, wherein the guide element ( 3 ), the pre-tensioning element ( 4 ) and the stop ( 5 ) are formed by forming from sheet metal. 6. The device according to claim 1, wherein the first resilient element ( 7 ), the second resilient element ( 8 ) and the further resilient element ( 9 ) are each formed by at least one Druckfe which is arranged concentrically to the control shaft and the guide element ( 3 ) , The biasing element ( 4 ) and the stop ( 5 ) are arranged concentrically to the control shaft ( 2 ) and formed by forming from sheet metal, and in which the first resilient element ( 7 ), the second resilient element ( 8 ), the other resilient Element ( 9 ), the biasing element ( 4 ) and the stop ( 5 ) in the guide element ( 3 ) are added, the stop ( 5 ) being fixed to the guide element ( 3 ), the control element ( 4 c) on one in the guide element ( 3 ) guided collar ( 4 b) of the biasing element ( 4 ) protrudes and engages in the guide track ( 3 a), the clearances ( 14 ) are formed by holes punched in the collar ( 4 b) and the stop disc ( 6 ) is formed in one piece from sheet metal with the spacers ( 6 a). 7. The device according to claim 1, wherein

• - The guide element ( 3 ) is sleeve-shaped with an inserted in its wall guideway ( 3 a) and a radially inward he most board ( 3 b) and the guide element, the control shaft ( 2 ) radially at least partially enclosing, concentrically Shift shaft ( 2 ) is arranged,
• - The biasing element ( 4 ) cup-shaped with a cylindrical Seitenwan extension, a hole in the bottom ( 4 a) and with a radially outwardly directed collar ( 4 b) and on the collar ( 4 b) a Steuerele element ( 4 c having) in the form of a tab, wherein the biasing member (4) arranged concentrically to the guide element (3) and by means of the Kra gens (4 b) radially guided on the inner circumferential surface of the guide element (3) and thereby c by means of the control element (4) engages in the guideway ( 3 a) and, in the neutral position, the collar ( 4 b) rests axially on the axially inward-facing surface of the first flange ( 3 b) and the biasing element ( 4 ) with the bottom ( 4 a) and one Part of the side wall protrudes axially outwards from the guide element ( 3 ),
• - the stop (5) (a 5) is sleeve-shaped with a radially inwardly directed second board, and (5 a) (3 b) has, as well as with the second board toward the first Bordes spaced from the first board (3 b) is attached to the inner lateral surface of the guide element ( 3 ),
• - The stop disc ( 6 ) is received in the stop ( 5 ) and points axially with the spacers ( 6 a) in the direction of the biasing element ( 4 ),
• - The first resilient element ( 7 ) is a switching spring ( 2 ) encompassing coil spring and the first resilient element ( 7 ) in one direction on the bottom ( 4 a) of the biasing element ( 4 ) and in the opposite direction via a Sleeve ( 11 ) is supported on the selector shaft ( 2 ), the sleeve ( 11 ) with a cylindrical part pointing in the direction of the bottom ( 4 a) sitting firmly on the selector shaft ( 2 ) and with a radially outwardly directed collar ( 11 a) is provided and wherein the first resilient element ( 7 ) bears axially on the collar ( 11 a),
• - The second resilient element ( 8 ) is formed by a helical spring and the second resilient element ( 8 ) surrounds the first resilient element ( 7 ) radially and is supported in one direction on the bottom ( 4 a) of the biasing element ( 4 ) ,
• - The further resilient element ( 9 ) is formed by a helical spring and the further resilient element ( 9 ) surrounds the second resilient element ( 8 ) ra dial and prestresses the stop disc ( 6 ) in the direction of the stop ( 5 ),

and at the

• - The further resilient element on the axially outward-facing side of the bottom ( 4 a) of the biasing element ( 4 ) of the driver ( 10 ) abuts and is supported in the opposite direction on one in the guide element ( 3 ) on ordered axial disc ( 13 ) .