DE102009057298A1 - Absorption device for switching cathedral with control shaft, has absorber weight, absorber unit and control device, where control device is formed to guide absorber weight in direction of rotation around drag axis of control shaft - Google Patents

Abstract

The absorption device has an absorber weight, an absorber unit and a control device, where the control device is formed to guide the absorber weight in a direction of rotation around a drag axis (7) of a control shaft (2). The absorber unit is arranged off center, asymmetrically or eccentrically to the drag axis. The absorber weight and the absorber unit form an absorber direction. An independent claim is also included for a switching cathedral.

Description

Name of the invention

Damping device for a switching shaft and switching dome with the damping device

Field of the invention

The invention relates to a damping device for a shift shaft with a damper weight, with a damper unit and with a guide device, wherein the guide means is adapted to guide the damper weight in a circumferential direction about the shift shaft, wherein the damper weight is guided attenuated about the damper unit in the circumferential direction and wherein the guide device is also designed to guide and / or hold the damper weight in the radial direction to the pivot axis rigidly and / or undamped. The invention also relates to a switching dome with this damping device.

Switch shafts are used to transmit switching and / or Wählbewegungen of a driver or an actuator to a manual transmission, for example, a change-speed gearbox. In the switching or selecting the shift shaft is moved or pivoted about its longitudinal axis. In order in particular to convey a comfortable shifting and / or dialing sensation to a driver, it is usual for the switching or selection movements to be subjected to an artificial switching or selection force. So it is known, for example, to use additional weights that introduce a certain inertia in the switching or dialing. In addition to this desired switching or selection force, the shift weight during the switching process but also be set in vibration, which can lead to unwanted vibrations. To compensate for these unwanted vibrations, various solutions are already known:
The publication FR 29078781 relates to a lever device which can be coupled to a switching shaft and which dampens vibrations via a complex spring-mass device.

A prior art is by the document DE 600 273 78 T2 is formed, which shows a system for damping a switching movement having a bridge construction, wherein the bridge construction is rotatably coupled to the switching shaft. At the free ends of the bridge construction, a damped shift weight is arranged in each case, so that the motions are damped in all directions during a switching movement and thus caused pivoting of the bridge structure about the pivot axis of the shift shaft.

The publication DE 103 242 24 A1 relates to a damped switching device for damping the switching movement of a shift shaft and is probably the closest prior art. In this switching device, two coupling halves are provided coaxially and concentrically with the switching shaft, which engage in the axial direction of the switching shaft and which are mounted resiliently in the circumferential direction via rubber elements. A first coupling half is rotationally coupled to the switching shaft and is carried by the second coupling half and thus on the damping elements in a pivoting of the second coupling half to initiate a pivoting movement in the switching shaft. A radial damping is not provided or only to a small extent. At the second coupling half a shift weight is fixed, which is thus damped in the direction of rotation.

description

The invention has for its object to provide a damping device for a shift shaft, which allows an improved damping behavior for a shift shaft. It is also an object of the invention to present a corresponding switching dome.

This object is achieved by a damping device having the features of claim 1 and by a switching dome having the features of claim 13. Preferred or advantageous embodiments of the invention will become apparent from the subclaims, the following description and the accompanying figures.

In the context of the invention, a damping device for a shift shaft is proposed, wherein the shift shaft is preferably suitable and / or designed for the transmission of shift and / or Wählbewegungen in a vehicle, in particular in a passenger car or a truck. The damping device is used for damping unwanted vibrations or vibrations, in particular vibrations or vibrations, which are caused by a switching movement of the shift shaft.

As components, the damping device has a damper weight, which is moved during the switching movement, as well as a damper unit, which is designed to dampen the unwanted vibrations or vibrations - hereinafter collectively referred to as vibrations. In addition, the damping device comprises a guide device which serves to guide the damper weight in a circumferential direction about the switching shaft, wherein the damper weight is guided attenuated in the circumferential direction via the damper unit. The damper unit acts as a mechanical low pass for vibrations that occur in the direction of rotation. The direction of rotation may be a concentric and / or coaxial movement path to the pivot axis. In modified embodiments, the direction of rotation only requires that the damper weight is guided in any curve about the shift shaft. For example, it is possible that in the case of a circular path as a movement path, the center of the circular path is also arranged offset relative to the pivot axis of the switching shaft.

The damping device is designed so that the damper weight in the radial direction is rigidly and / or umgedämpft out or held. Thus, the damping device sets a vibration-damped switching weight, which is limited in terms of the degree of freedom of damping. Vibration damping in the radial direction is not considered necessary, but instead the rigid and / or undamped coupling between the guide means and the shift weight in the radial direction to the pivot axis advantageously prevents or reduces the generation of vibrations in that direction.

In the context of the invention it is proposed that the damper unit is arranged as a whole asymmetrically and / or eccentrically and / or off-center to the pivot axis. In a functional consideration of the invention, it is alternatively or additionally proposed that the damper weight and the damper unit form a damper filter device, which is arranged outside the power transmission path for the switching and / or selection movement of the shift shaft.

The invention is based on the idea to enable a simple and cost-effective connection of a damped shift weight on the shift shaft, at the same time the degree of freedom of the vibration of the shift weight should be limited. Characterized in that the damper unit is arranged asymmetrically and / or eccentrically, in particular off-center to the pivot axis of the switching shaft, the integration and assembly is much easier. For example, it is no longer absolutely necessary to attack the damper unit when the damper shaft fails, but it is sufficient to exchange the damper unit arranged eccentrically, in particular distanced, at a distance and / or offset radially from the control shaft. The functional assembly of the damped shift weight is thus decoupled from the functional group of the shift shaft. As damper filter device, the damper weight and the damper unit are arranged outside the power transmission path for the switching and / or Wählbewegungen so that they do not form a serial part of the power transmission path, but are arranged in particular as dead end links to the power transmission path. Also, this possible embodiment of the invention has the advantage that the damper silencer device does not need to be installed serially in the power transmission path and when replacing the power transmission path this does not necessarily have to be opened.

Particularly advantageous is the damper device in the acceleration and deceleration phase in the context of switching and / or dialing operation. Often, the damper device is accelerated and abruptly at the end of the trajectory, z. B. by a hard stop, braked so that vibrations are generated in the shift shaft or in the damper device. In this or another abrupt change in speed, the damper weight can swing and exhaust by internal friction in the damper unit, the vibration energy without the vibrations z. B. be passed over a cable or lever in the passenger compartment.

In a preferred embodiment of the invention, the damping device has a damper arm, wherein the damper weight is arranged on the damper arm with serial interposition of the damper unit. The damper arm is arranged in particular projecting in the radial direction to the shift shaft, wherein the damper unit is positioned on the damper arm spaced from the shift shaft.

It is preferably provided that the damper arm is rotatably coupled to the shift shaft. Optionally, the damper arm is directly coupled, for example via a positive connection, such as Torx, two-flat, star shape, etc., with the switching shaft, in alternative embodiments, further intermediate elements may be provided.

In a further development of the invention, the damping device comprises a guide arm, wherein on the guide arm, the damper weight tolerances and / or umgedämpft and / or rigidly coupled with respect to the radial direction to the pivot axis. The guide arm thus restricts the degree of freedom of the damping of the damping device in the radial direction.

In a first possible alternative it is provided that the guide arm is arranged rotatably freely on the shift shaft. For example, the guide arm on a circular passage opening, which is freely rotatably mounted on the shift shaft. This coupling ensures that the guide arm limits the damping only in the radial direction, but not in the direction of rotation. In an alternative embodiment can be provided be that the guide arm is hinged to the damper arm. This alternative embodiment allows a simplified mounting of the damping device on the shift shaft, since only the mechanical interface for the damper must be created. Exactly considered so that the damper weight is performed in a smaller radius than the other alternative, so that at larger pivoting angles between the damper arm and guide arm a force in or against the radial direction would be exerted on the damper weight. However, since the possible pivoting angle between the damper arm and guide arm is very small, these effects are negligible, so that the damper weight is also freely movable in the working direction in the circumferential direction in a technically sufficient approximation and rigidly guided in the radial direction.

In one possible embodiment of the invention, the guide arm and the damping weight are integrally formed. In this embodiment, it is also possible that this combination is realized as a casting, which is inexpensive to produce.

In another embodiment of the invention, the damper arm and / or the guide arm are realized as a sheet metal construction, wherein these consist of a sheet metal semifinished product z. B. by separating and if necessary. Forming is or are made. In this embodiment, the guide device is very cheap to produce, especially at high volumes. A corresponding structural rigidity of the two arms can be carried out, for example, by bending areas, in particular folds, optionally with bending lines parallel or perpendicular to the radial direction of the pivot axis.

In particular, it is provided that the damper arm and guide arm are arranged to be movable relative to one another, that is, in particular to be pivoted about the point of articulation of the guide arm on the shift shaft or on the damper arm, the movement of which being damped relative to one another in the pivoting direction via the damper unit.

In a possible structural embodiment of the invention, the guide device has a coupling section with an interface for coupling z. B. a shift cable or a shift linkage. For example, the section may comprise a ball head as a mechanical interface. By the inclusion of the coupling portion of the damping device is assigned a further function, with the integration of a multifunctional assembly is created.

Particularly preferably, the coupling portion is arranged on the damper arm, so that initiated via the guide means switching and / or Wählbewegungen be introduced rigidly or within the power transmission path without a serial attenuator on the shift shaft. The interface is arranged on the damper arm, wherein the damper weight with the damping unit forms the damper filter device, which is not serially interposed in the power transmission path between the interface and the shift shaft.

In a possible structural embodiment of the invention, the damper unit has a straight hollow cylindrical shape, which is arranged eccentrically to the shift shaft. Particularly preferably, the damper weight on a dumbbell shape, wherein the dumbbell handle is enclosed by the damper unit with the hollow cylindrical shape. In one possible embodiment, the damper arm comprises a hollow cylinder section, which surrounds the damper weight and the damper unit, so that the damper arm holds the damper weight with the interposition of the damper unit.

Another object of the invention relates to a switching dome with a switching shaft for transmitting switching and / or Wählbewegungen, which is arranged pivotably and / or displaceably, and with a damping device for damping the shift shaft in the switching and / or Wählbewegungen, wherein the damping device as described above or according to one of the preceding claims.

In a further development of the invention, the switching shaft has a form-fitting section for the positive connection of the damper arm of the damping device. The fixation of the damping device, in particular of the damper arm, on the shift shaft can be done for example by a nut which is screwed in the axial direction on the shift shaft.

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

1 a schematic three-dimensional representation of a switching dome in a lateral plan view;

2 a schematic plan view in the axial direction of the switching dome in the 1 ;

3 a schematic side view of the switching dome in the 1 ;

4 a longitudinal section through the pivot axis of the switching shaft of the switching dome in the 1 in a similar representation as the 3 ,

The 1 shows in a schematic three-dimensional lateral plan view of a switching dome 1 for a vehicle transmission, in particular a change-speed gearbox. In the switching dome 1 is a shift shaft 2 arranged, which for example shift finger 3 and other switching transmission elements.

The shift shaft 2 is piercing through a Schaltdomgehäuse 4 guided, which can be screwed onto a switch housing, not shown. At the free end of the shift shaft 2 is a first lever device 5 for the transmission of Wählbewegungen and a second lever device 6 arranged to transmit switching movements. In the selection movements, the shift shaft 2 along its pivot axis 7 shifted, with switching movements, the shift shaft 2 around its pivot axis 7 pivoted.

This pivoting movement is in the 2 by an arrow in the direction of rotation 10 around the pivot axis 7 illustrating a schematic plan view in the axial direction of the switching dome 1 in the 1 shows. To compensate for unwanted vibrations, the switching dome 1 a damping device 8th on, which as a boom radially to the shift shaft 2 extends and the free end damper weight 9 shows. The damper weight 9 becomes during the pivoting of the switching shaft 2 around the pivot axis 7 in the direction of rotation 10 around the pivot axis 2 guided. The damping device 8th serves to undesirable vibrations during the switching movement, ie when the damper weight is pivoted 9 around the pivot axis 7 to dampen.

For the exact structure of the damping device 8th will be on the 3 and 4 refer, which is a lateral plan view and a longitudinal section through the pivot axis 7 of the switching dome 1 demonstrate. The damping device 8th has a guide device 11 on, which with one end to the stem 2 and with its other end to the damper weight 9 ends. More specifically, the leadership facility becomes 11 from two parallel arms, namely a guide arm 12 and a damper arm 13 , educated.

The damper arm 13 is at the selector shaft 2 in the direction of rotation 10 rotationally fixed via a positive connection, such as a Torx or a two-plane fixed. At its free end is the damper arm 13 pronounced hollow cylindrical and takes inside a likewise hollow cylindrical damper unit 14 , for example made of plastic, rubber or elastomer, as well as the damper weight 9 on. In particular, the damper weight 9 over the damper unit 14 in the damper arm 13 held so that the damper unit 14 a mechanical low pass between damper arm 13 and damper weight 9 forms. After the damper unit 14 In this embodiment of the invention is rotationally symmetrical, vibrations are damped in all directions.

It is assumed, however, that a damping in the radial direction to the pivot axis 2 is not necessary, but rather counterproductive acts by this additional and unwanted vibrations in the overall system brings. In order to limit or prevent the damping in the radial direction, the guide arm 12 intended. This is on the shift shaft 2 freely rotatably mounted so that it is free around the pivot axis 7 on the stem 2 can turn. At the other end, the guide arm picks up 12 the damper weight 9 rigid and / or in the radial direction without tolerance. Through the guide arm 12 is the damper weight 9 thus in the radial direction rigid and / or undamped to the switching shaft 2 coupled. With the damping device 8th it is achieved that vibrations in the direction of rotation 10 over the damper unit 14 damped and vibrations in the radial direction to the shift shaft 12 be taken rigidly. In particular, vibrations caused by a deceleration of the damping device 8th on a hard stop during the pivoting movement in the direction of rotation 10 arise, are effectively damped.

As can be seen in particular from the 3 results, the second lever means 6 a coupling section 15 with a ball head 16 on, which is designed to initiate the switching forces and which preferably in one piece on the damper arm 13 is arranged so that switching movements unattenuated by the lever device 6 on the shift shaft 2 be transmitted. The assembly comprising the damper weight 9 , the damper unit 14 and leadership facility 11 , thus forms a damper or damper damper, which is positioned outside the power transmission flow of the switching movement.

The assembly of the damping device 8th is easy to do by putting this on the stem 2 , In particular, the positive connection portion of the shift shaft 2 , put on and about a mother 17 screwed in the axial direction and thus fixed.

If necessary, the mother 16 a pot element 18 secured, which forms a guide surface for the initiation of Wählbewegungen. In this design is a role 19 ( 1 ) of the first lever device 5 between a collar of the cup element 18 and a dialing section 20 on the guide device 11 , especially on the guide arm 12 arranged to transfer the selection forces between the guide surface and the selector section 20 rolls. In this embodiment, the damping device 8th assigned another function, namely the transmission of dialing forces.

LIST OF REFERENCE NUMBERS

1

switch dome

2

shift shaft

3

shift finger

4

gearshift tower

5

lever means

6

lever means

7

swivel axis

8th

damping device

9

damper weight

10

direction of rotation

11

guide means

12

guide

13

damper

14

damper unit

15

coupling portion

16

ball head

17

mother

18

cup element

19

role

20

selection section

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

• FR 29078781 [0003]
• DE 60027378 T2 [0004]
• DE 10324224 A1 [0005]

Claims (14)

Damping device ( 8th ) for a shift shaft ( 2 ) with a damper weight ( 9 ), with a damper unit ( 14 ) and with a management facility ( 11 ), the management device ( 11 ), the damper weight ( 9 ) in a circumferential direction ( 10 ) about the pivot axis ( 7 ) of the switching shaft ( 2 ), the damper weight ( 9 ) via the damper unit ( 14 ) in the direction of rotation ( 10 ), the management device ( 11 ) is also designed, the damper weight ( 9 ) in the radial direction to the pivot axis ( 7 ) rigidly and / or undamped and / or to keep, characterized in that the damper unit ( 14 ) off-center, asymmetric and / or eccentric to the pivot axis ( 7 ) is arranged and / or that the damper weight ( 9 ) and the damper unit ( 14 ) form a damper filter device, which outside the power transmission path for the switching and / or selection movement of the shift shaft ( 2 ) is arranged. Damping device ( 8th ) according to claim 1, characterized by a damper arm ( 13 ), wherein on the damper arm ( 13 ) with serial interposition of the damper unit ( 14 ) the damper weight ( 9 ) is arranged. Damping device ( 8th ) according to claim 2, characterized in that the damper arm ( 13 ) rotatably with the shift shaft ( 2 ) is coupled. Damping device ( 8th ) according to one of the preceding claims, characterized by guide arm ( 12 ), wherein on the guide arm ( 12 ) the damper weight ( 9 ) is low-tolerance and / or undamped and / or rigidly coupled. Damping device ( 8th ) according to claim 4, characterized in that the guide arm ( 12 ) rotationally free on the switching shaft ( 2 ) and / or on the guide arm ( 13 ) is stored. Damping device ( 8th ) according to claim 4 or 5, characterized in that the guide arm ( 12 ) and the damper weight ( 9 ) in one piece, in particular designed as a casting. Damping device ( 8th ) according to one of the preceding claims, characterized in that the damper arm ( 13 ) and / or guide arm ( 12 ) is formed as a sheet metal construction or are. Damping device ( 8th ) according to one of the preceding claims, characterized in that the guide device ( 11 ) a coupling section ( 15 ), which has an interface ( 16 ) for an initiation of the switching and Wählbewegungen carries. Damping device ( 8th ) according to claim 8, characterized in that the coupling section ( 15 ) on the damper arm ( 13 ) is arranged. Damping device ( 8th ) according to one of the preceding claims, characterized in that the damper unit ( 14 ) has a hollow cylindrical shape. Damping device ( 8th ) according to one of the preceding claims, characterized in that the damper weight ( 9 ) has a dumbbell shape and / or a dumbbell handle. Damping device ( 8th ) according to one of claims 10 or 11, characterized in that the damper arm ( 13 ) has a hollow cylinder portion which the damper weight ( 9 ) and the damper unit ( 14 ) surrounds. Switching dome ( 1 ) with a switching shaft ( 2 ) for the transmission of switching and / or Wählbewegungen which is arranged pivotably and / or displaceably, and with a damping device ( 8th ) according to one of the preceding claims for damping vibrations or vibrations of the switching shaft ( 2 ) in the switching and / or Wählbewegungen. Switching dome ( 1 ) according to claim 13, characterized in that the switching shaft ( 2 ) a form-fitting section for the pivot-resistant connection of the damping device ( 8th ), in particular the damper arm ( 13 ), and / or a mechanical interface for freely rotatable receiving the guide arm ( 12 ) having.

Images