DE112006002997B4 - torsional vibration dampers - Google Patents

Abstract

Torsional vibration damper having at least two flywheel masses (2, 3) which are rotatable against the resistance of at least two deformable energy storage elements (7, 8), which are coupled to one another by at least one coupling device (24) which, when a first energy storage element (7) deformed, causes a targeted entrainment of a second energy storage element (8) and at least one first (27) and a second (28) entrainment means, wherein the first entrainment means (27) with a first coupling element (31) which in turn with the first energy storage element ( 7), and the second driving device (28) is coupled to a second coupling element (32) which in turn is coupled to the second energy storage element (8), wherein the coupling device (24) comprises an annular base body (25), wherein the annular base body (25) emanating two driver fingers (27,28), wherein the annular base body (25) z wiping the primary flywheel (2) of the torsional vibration damper and at least one sliding shell (41,42) is floatingly mounted, which is arranged between the energy storage elements (7,8) and the primary flywheel (2) or an input part of the torsional vibration damper.

Description

The invention relates to a torsional vibration damper, in particular a split flywheel, with at least two centrifugal masses, which are against the resistance of at least two deformable energy storage elements, in particular helical compression springs, rotatable coupled by at least one coupling means which, when a first energy storage element deformed, in particular is relaxed, causes a targeted entrainment of a second energy storage element and having at least a first and a second entrainment device.

Such torsional vibration dampers are for example from the DE 100 28 268 A1 and the DE 199 03 033 A1 known.

The object of the invention is to prevent unwanted shaking during operation of a vehicle equipped with a torsional vibration damper according to the preamble of claim 1 motor vehicle.

The object is achieved by a torsional vibration damper with the features of claim 1.

The object is with a torsional vibration damper, in particular a split flywheel, with at least two centrifugal masses, which are rotatable against the resistance of at least two deformable energy storage elements, in particular helical compression springs, which are coupled together by at least one coupling device which, when a first energy storage element deformed, is relaxed in particular, causes targeted entrainment of a second energy storage element and at least a first and a second entrainment has, achieved in that the first entrainment with a first coupling element, which in turn is coupled to the first energy storage element, and the second entrainment device with a second coupling element is coupled, which in turn is coupled to the second energy storage element. When carried out in the context of the present invention tests on conventional torsional vibration dampers was found that at high speeds in alternation between tensile and shear operation, the energy storage elements remain under friction while the output part of the torsional vibration damper moves in the direction of thrust. When the speed drops, it can happen that an energy storage element jumps when a certain speed is reached. If the energy storage elements jump at different speeds, then a so-called dynamic unbalance arises between these speeds. The coupling of the coupling elements according to the invention with the coupling device, an unwanted stalling or jumping of the energy storage elements can be prevented. The coupling elements are stop or buffer elements.

A preferred embodiment of the torsional vibration damper is characterized in that the coupling elements are each attached to the end of the energy storage elements, which is first acted upon by a tensile stress of the torsional vibration damper with force. The energy storage elements are preferably arcuate helical compression springs. The coupling elements are preferably, for example, cup-shaped stop elements which are arranged in the circumferential direction between the output part or an output-side loading part of the torsional vibration damper and the associated energy storage element.

A further preferred embodiment of the torsional vibration damper is characterized in that the coupling elements each have a base body with a fastening portion and a coupling portion. The main body preferably has substantially the shape of an at least partially hollow circular cylinder. The attachment portion serves for fastening the coupling element to the associated energy storage element. The coupling section serves for coupling to the coupling device.

A further preferred embodiment of the torsional vibration damper is characterized in that the attachment portion has at least one circumferential groove. The groove allows a positive connection between the coupling element and the associated energy storage element. As a result, the coupling element is held in the axial direction on the energy storage element.

A further preferred embodiment of the torsional vibration damper is characterized in that the coupling portion comprises two axially spaced apart coils. The space between the coils forms a possibility of engagement for a driver element.

An inventive torsional vibration damper is characterized in that the coupling device comprises an annular base body. Preferably, the coupling device is integrally formed as a sheet metal part.

An inventive torsional vibration damper is further characterized in that emanating from the annular base two driver fingers. The driver fingers engage in the assembled state of the torsional vibration damper in each case in a space between the coils on the coupling portion.

Another preferred embodiment of the torsional vibration damper is characterized in that the driver fingers extend in the axial direction. As a result, the installation of an additional inner damper is made possible radially within the energy storage elements.

A further preferred embodiment of the torsional vibration damper is characterized in that the annular base body has an angular cross-section. As a result, a stable mounting of the coupling device is made possible.

A further preferred embodiment of the torsional vibration damper is characterized in that the annular base body between the primary flywheel or the input part of the torsional vibration damper and at least one sliding shell is floatingly mounted, which is arranged between the energy storage elements and the primary flywheel or the input part of the torsional vibration damper. Preferably, each energy storage element is associated with a sliding shell.

A further preferred embodiment of the torsional vibration damper is characterized in that a plurality of projections are provided on the primary flywheel or the input part, by which the sliding cup is positioned in the axial direction. This ensures that the annular base body of the coupling device has sufficient clearance.

Another preferred embodiment of the torsional vibration damper is characterized in that the sliding shell is provided in the vicinity of the projections in each case with a recess. This space can be saved without the function of the torsional vibration damper is affected.

A further preferred embodiment of the torsional vibration damper is characterized in that the annular base body in the vicinity of the projections in each case has a recess. The recess allows the passage of the associated projection in the axial direction.

• 1 einen Drehschwingungsdämpfer gemäß einem ersten Ausführungsbeispiel in der Draufsicht;
• 2 die Ansicht eines Schnitts entlang der Linie II-II in 1;
• 3 einen vergrößerten Ausschnitt aus 2;
• 4 eine perspektivische Darstellung eines Kopplungsrings;
• 5 eine Schraubendruckfeder mit einem Kopplungselement in der Draufsicht;
• 6 eine perspektivische Darstellung des Kopplungselements;
• 7 einen Drehschwingungsdämpfer gemäß einem zweiten Ausführungsbeispiel in der Draufsicht;
• 8 die Ansicht eines Schnitts entlang der Linie VIII-VII in 7;
• 9 einen vergrößerten Ausschnitt IX aus 8;
• 10 ein Ausgangsteil des Drehschwingungsdämpfers aus 7 in der Draufsicht;
• 11 eine Gleitschale des Drehschwingungsdämpfers aus den 7 bis 9 in der Draufsicht;
• 12 die Ansicht eines Schnitts entlang der Linie XII-XII in 11 und
• 13 die Ansicht eines Schnitts entlang der Linie XIII-XIII in 11.

Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it:

• 1 a torsional vibration damper according to a first embodiment in plan view;
• 2 the view of a section along the line II-II in 1 ;
• 3 an enlarged section 2 ;
• 4 a perspective view of a coupling ring;
• 5 a helical compression spring with a coupling element in plan view;
• 6 a perspective view of the coupling element;
• 7 a torsional vibration damper according to a second embodiment in plan view;
• 8th the view of a section along the line VIII-VII in 7 ;
• 9 an enlarged section IX 8th ;
• 10 an output part of the torsional vibration damper 7 in the plan view;
• 11 a sliding of the torsional vibration of the 7 to 9 in the plan view;
• 12 the view of a section along the line XII-XII in 11 and
• 13 the view of a section along the line XIII-XIII in 11 ,

The in the 1 and 2 in various views shown torsional vibration damper forms a split flywheel 1 , which is a first or primary flywheel attachable to an output shaft, not shown, of an internal combustion engine 2 and a second or secondary flywheel mass 3 has. At the second flywheel 3 a friction clutch is secured with the interposition of a clutch disc, via which an input shaft, also not shown, of a transmission can be coupled and uncoupled. The primary flywheel 2 is also referred to as the input part of the torsional vibration damper. The secondary mass 3 is also referred to as the output part of the torsional vibration damper.

The two momentum masses 2 and 3 are about a storage 4 rotatably mounted relative to each other. Warehousing 4 is in the illustrated embodiment, radially outside of holes 5 for performing fastening screws for mounting the first flywheel on the Output shaft of the internal combustion engine arranged. Between the two momentum masses 2 and 3 is a damping device 6 effective, which includes energy storage elements, in turn, of helical compression springs 7 . 8th be formed. In the plan view in 1 you can see that inside the helical compression springs 7 . 8th in each case a further helical compression spring 9 . 10 is arranged, which has a smaller outer diameter. Radial inside the helical compression springs 7 to 10 is an internal damper 11 arranged, the helical compression springs 12 includes. The helical compression springs 7 . 8th are curved in the circumferential direction and each extend over an angular range of almost 180 degrees. The two helical compression springs 7 and 8th are arranged diametrically opposite.

The two momentum masses 2 and 3 have loading areas 14 . 15 . 16 and 17 for the energy storage 7 . 8th , The admission areas 14 . 15 are formed on the input side of the primary flywheel 2. The admission areas 16 and 17 are on the output side between the admission areas 14 and 15 arranged. In addition, the loading area 16 via a flange-like admission part 20 with the help of rivet fasteners 21 with the secondary flywheel 3 connected. The flange-like admission part 20 serves as a torque transmitting element between the energy storage 7 . 8th and the secondary flywheel 3 , The flange-like urging member 20 is also called an output member.

The two helical compression springs 7 and 8th are via a coupling device 24 coupled together. The coupling device 24 is in 4 shown in perspective. In 4 you can see that the coupling device 24 an annular base body 25 comprising an angular cross-section. Therefore, the coupling device 24 Also referred to as a coupling ring. From the annular body 25 extend two diametrically arranged driver fingers 27 . 28 in the axial direction.

In 3 you can see that the driver finger indicated by dashed lines 27 parallel to a leg of the angular cross-section of the annular base body 25 is arranged. In 1 you can see that the driver fingers 27 . 28 , which emanate from the coupling ring, each in a coupling element 31 . 32 intervention. The coupling elements 31 . 32 are each at one end of the associated helical compression spring 7 . 8th attached.

In 5 you can see that the coupling element 31 a substantially sleeve-shaped base body 34 having a mounting portion 35 and a coupling section 36 having. The attachment section 35 is with a circumferential groove 37 equipped, in which a spring coil at the end of the helical compression spring 7 intervenes. The coupling section 36 has two leagues 38 . 39 on, which are spaced apart. The space between the bonds 38 and 39 allows the engagement of a driver finger.

In 6 is the coupling element 31 shown in perspective alone. In the perspective view one sees that the bundles 38 and 39 have the same inner and outer diameter.

In the enlarged view of the 3 it can be seen that in the radial direction between the helical compression spring 7, 8 and the input part 2 of the torsional vibration damper 1 a sliding shell 41 is arranged. The slip bowl 41 is positioned in the axial direction by a projection 43, which consists of a lid 40 of the entrance part 2 is pushed out. In 1 you see that a total of three protrusions 43 to 45 from the lid 40 are pushed out. The three projections 43 to 45 make sure that the sliding cup 41 no unwanted movements in the axial direction or tilted in the space.

In the 7 to 9 is a similar embodiment as in the 1 to 6 shown. To denote the same parts, the same reference numerals are used. To avoid repetition, the preceding description of the 1 to 6 directed. In the following, only the differences between the two embodiments will be discussed.

In 8th you can see that the torsional vibration damper 1 two sliding cups 41 and 42 contains. In the enlarged view of the 9 you can see that the main body 25 of the coupling ring 24 has a recess 60 has, through which a projection 53 extends through. The lead 53 is out of the lid 40 the primary flywheel 2 pushed out and forms an axial stop for the sliding shell 42 ,

In 10 you can see that at the flange-like admission part 20 three projections 53 to 55 and 56 to 58 are provided for the two sliding shells. The projections are arranged distributed over the circumference of the associated sliding shell.

In the 11 to 13 is the slip bowl 42 shown in different views. In the sectional view of 13 you can see that the slip bowl 42 a recess 61 has, in the installed state of the sliding shell 42 in the area of a driving finger 28 of the coupling ring 24 is arranged.

LIST OF REFERENCE NUMBERS

1.

flywheel

Second

Inertia

Third

Inertia

4th

storage

5th

drilling

6th

attenuator

7th

Helical compression spring

8th.

Helical compression spring

9th

Helical compression spring

10th

Helical compression spring

11th

inner damper

12th

Helical compression spring

14th

impingement

15th

impingement

16th

impingement

17th

impingement

20th

urging member

21st

Nietverbindungselement

24th

coupling device

25th

body

27th

driving finger

28th

driving finger

31st

coupling element

32nd

coupling element

34th

body

35th

attachment section

36th

coupling portion

37th

groove

38th

Federation

39th

Federation

40th

cover

41st

sliding

42nd

sliding

43rd

head Start

44th

head Start

45th

head Start

53rd

head Start

54th

head Start

55th

head Start

56th

head Start

57th

head Start

58th

head Start

60th

recess

61st

recess

Claims (10)

Torsional vibration damper having at least two flywheel masses (2, 3) which are rotatable against the resistance of at least two deformable energy storage elements (7, 8), which are coupled to one another by at least one coupling device (24) which, when a first energy storage element (7) deformed, causes a targeted entrainment of a second energy storage element (8) and at least one first (27) and a second (28) entrainment means, wherein the first entrainment means (27) with a first coupling element (31) which in turn with the first energy storage element ( 7), and the second driving device (28) is coupled to a second coupling element (32) which in turn is coupled to the second energy storage element (8), wherein the coupling device (24) comprises an annular base body (25), wherein the annular base body (25) emanating two driver fingers (27,28), wherein the annular base body (25) z wiping the primary flywheel (2) of the torsional vibration damper and at least one sliding shell (41,42) is floatingly mounted, which is arranged between the energy storage elements (7,8) and the primary flywheel (2) or an input part of the torsional vibration damper. Torsional vibration damper after Claim 1 , characterized in that the coupling elements (31,32) respectively at the end of the energy storage elements (7,8) are mounted, which is first applied to a tensile stress of the torsional vibration damper with force. Torsional vibration damper according to one of the preceding claims, characterized in that the coupling elements (31, 32) each have a base body (34) with a fastening section (35) and a coupling section (36). Torsional vibration damper after Claim 3 , characterized in that the fastening portion (35) has at least one circumferential groove (37). Torsional vibration damper after Claim 3 or 4 , characterized in that the Coupling portion (36) has two axially spaced apart coils (38,39). Torsional vibration damper after one of Claims 1 to 5 , characterized in that the driver fingers (27,28) extend in the axial direction. Torsional vibration damper after one of Claims 1 to 6 , characterized in that the annular base body (25) has an angular cross-section. Torsional vibration damper after one of Claims 1 to 7 , characterized in that on the primary flywheel (2) or the input part a plurality of projections (43-45, 53-58) are provided, through which the sliding shell (41,42) is positioned in the axial direction. Torsional vibration damper after Claim 8 , characterized in that the sliding shell (42) in the vicinity of the projections in each case with a recess (61) is provided. Torsional vibration damper after Claim 8 or 9 , characterized in that the annular base body (25) in the vicinity of the projections in each case a recess (60).

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