DE102017114872A1 - Vibration damper device with screw lock - Google Patents

Abstract

The invention relates to a vibration damping device (10) for torsional vibration damping between a crankshaft of an internal combustion engine and a transmission input shaft of a motor vehicle transmission, comprising at least one disc element (14) for mounting on the crankshaft, and a flange element (24) arranged on the disc element (14) Disc member (14) and the flange member (24) for fixing the disc member (14) on the crankshaft of the internal combustion engine each on a pitch circle (36) arranged mounting holes (38) between the disc member (14) and the flange (24) has a screw lock (42) is arranged, which comprises a ring member (44) arranged on the ring member (44) retaining fingers (46), and in each case a retaining finger (46) projects at least in sections with a Haltefingerendabschnitt (48) in a mounting opening (38).

Description

The invention relates to a vibration damper device, in particular a Einmassenschwungrad or a dual mass flywheel, with a screw lock, wherein the vibration damper device comprises at least one disc element with a mounting hole for placement on a clutch shaft of an internal combustion engine, and the screw locking a fastening screw at least partially, in particular until the final assembly of the vibration damper device a crankshaft, positioned in the mounting hole.

Vibration damper device, in particular single-mass flywheels and / or dual-mass flywheels are well known. It is also known that both a single-mass flywheel and / or a dual-mass flywheel has a disk element which is fastened to a crankshaft of an internal combustion engine via a screw connection.

In the automotive industry, there is a regular need to supply or deliver vendor parts ready for assembly. Ready to install means that the installer is provided along with the mounting screws to the fitter on the assembly line. In this way, the assembly times can be reduced and in particular errors, for example in the choice of the fastening screw can be reduced.

In order to meet the requirements of the ready-to-install components, the mounting screws must preferably be positioned securely in a mounting hole until installation. For this purpose, it is known that plastic parts are plugged onto the individual fastening screws and the fastening screws are pressed into the fastening openings, so that the plastic part forms a frictional connection between the fastening opening and the fastening screw. This means that a plastic part must be plugged onto each fastening screw, which is expensive and whereby the manufacturing cost of a supplier part can be increased.

There is a regular need to further develop the screw lock of a vibration damper device in order to simplify and / or accelerate, for example, the manufacturing process of the ready-to-mount vibration damper device. Likewise, an effort to reduce the cost of production.

It is the object of the invention to provide a vibration damper device in which a fastening screw can be fixed in a secure manner until the final assembly of the vibration damper device in the fastening opening. In addition, the vibration damper device should be inexpensive to produce.

The object is achieved by a vibration damper device with the features of claim 1. Preferred embodiments of the invention are set forth in the subclaims and the description below, which may each individually or in combination constitute an aspect of the invention.

According to the invention a vibration damper device for torsional vibration damping between a crankshaft of an internal combustion engine and a transmission input shaft of a motor vehicle transmission is provided, comprising at least one disc element for mounting on the crankshaft, and arranged on the disc member flange element, wherein the disc member and the flange member for fixing the disc member to the crankshaft of Internal combustion engine has each arranged on a pitch circle mounting holes, between the disc member and the flange a screw lock is arranged, which comprises a ring member arranged on the ring member retaining fingers, and a respective retaining finger at least partially protrudes with a Haltefingerendabschnitt into a mounting hole.

The vibration damper device may preferably be designed as a single flywheel or as a dual mass flywheel. Both the one-mass flywheel and the dual-mass flywheel each have a disk element which is connected to the crankshaft of an internal combustion engine for the introduction and / or transmission of a torque. On the disc element a flange element is arranged. The flange member may preferably be a reinforcing ring in a compound flywheel. In a dual-mass flywheel, the flange element is preferably part of a bearing dome. The disk element and the flange element arranged on the disk element have fastening openings arranged on a respective pitch circle for fastening the disk element on the crankshaft. Through the mounting holes, a fastening screw for screwing the disc element can be performed on the crankshaft. A screw lock is arranged between the disc element and the flange element, wherein the screw lock comprises a ring element with holding fingers arranged on the ring element. In each case, a holding finger protrudes at least in sections with a Haltefingerendabschnitt into a mounting opening. Now a fixing screw in the Attached mounting hole and / or screwed, engages the Haltefingerendabschnitt in the external thread of the fastening screw, so that the fastening screw can be positively positioned in the mounting opening and / or held. In this way, an integrally formed screw lock is provided for the plurality of attachment opening, which can be arranged in a simple manner between the disc element and the flange element and provides a screw lock for each attachment opening. Due to the one-piece nature of the screw lock, a simplified position fixing of the fastening screws in the fastening opening can be provided until final assembly. In addition, the manufacturing process of the vibration damper device can be accelerated, so that manufacturing costs can be reduced.

In an advantageous development of the invention it is provided that the screw lock and / or the retaining fingers are formed from a resilient material, and / or preferably have a rubber-like and / or plastic-like material. In this way, the retaining fingers and / or the Haltefingerendabschnitt are formed in the axial direction of the mounting opening limited resilient and / or deformable. This can be advantageous for the assembly of the vibration damper device. During assembly, a centering pin is preferably guided through the respective attachment openings. The retaining fingers projecting into the fastening opening should therefore be made yielding in the retaining finger end section so that the retaining fingers can align in the radial direction after the centering pins have been removed. Due to the resiliently formed screw locking and / or holding fingers, damage to the screw lock during assembly of the vibration damper device can preferably be reduced.

An advantageous development of the invention lies in the fact that the retaining fingers are arranged in the radial direction inwards or in the radial direction outwards on the ring element. Thus, the ring member either in the radial direction inwardly formed retaining fingers or in the radial direction outwardly directed retaining fingers which protrude at least partially in the radial direction in the respective mounting hole. If the holding fingers are directed outwards in the radial direction, the diameter of the ring element can be reduced. Thus, the material of the fuse element can be reduced, whereby manufacturing costs can be reduced.

Finally, a preferred embodiment of the invention provides that the disc element on a flange element facing the disc element end face and / or the flange on a disk element facing the Flanschelementstirnseite formed in the radial direction grooves, in which the holding fingers are guided at least in sections. In this way, the influence of the locking ring can be reduced to a, exerted by the fastening screw, pressing force for fastening the disc member on the crankshaft.

• 1 einen Teillängsschnitt durch eine als Zweimassenschwungrad ausgebildete Schwingungsdämpfereinrichtung mit einer Schraubensicherung, gemäß einem bevorzugten Ausführungsbeispiel der Erfindung,
• 2 eine Detailansicht im Teillängsschnitt durch eine Befestigungsöffnung mit der Schraubensicherung, gemäß dem bevorzugten Ausführungsbeispiel der Erfindung,
• 3 eine Aufsicht auf die Schraubensicherung mit den in radialer Richtung angeordneten Haltefingern, gemäß dem bevorzugten Ausführungsbeispiel der Erfindung.

The invention will now be described by way of example with reference to the accompanying drawing with reference to a preferred embodiment, wherein the features shown below, both individually and in combination may represent an aspect of the invention. Show it:

• 1 a partial longitudinal section through a designed as a dual mass flywheel vibration damper with a screw lock, according to a preferred embodiment of the invention,
• 2 a detailed view in partial longitudinal section through a mounting opening with the screw lock, according to the preferred embodiment of the invention,
• 3 a plan view of the screw lock with the radially arranged holding fingers, according to the preferred embodiment of the invention.

In 1 is a vibration damper device 10 the example of a dual mass flywheel 12 shown. The dual mass flywheel 12 has a trained as a primary pulley 18 about an axis of rotation 16 rotatably arranged disc element 14 for introducing a torque. In addition, the dual-mass flywheel includes 12 one against the action of a spring element 20 around the axis of rotation 16 rotatable trained secondary pulley 22 for discharging the torque.

On the primary disk 18 is a flange element 24 having bearing dome 26 arranged, with the bearing dome 26 over the flange element 24 on the primary disk 18 is fastened. The secondary disc 22 supported by a rolling bearing 28 against an outer peripheral surface 30 of the camp dome 26 from. On an inner peripheral surface 32 of the camp dome 26 is a pilot camp 34 arranged to receive a transmission input shaft (not shown).

The primary disk 18 and that on the primary disk 18 arranged flange element 24 of the camp dome 26 have to attach the primary pulley 18 on a crankshaft (not shown) each on a pitch circle 36 arranged fastening openings 38 on. Through the mounting holes 38 becomes a fixing screw 40 for screwing on the primary pulley 18 guided on the crankshaft. Between the primary disk 18 and the flange member 24 is a screw lock 42 arranged, with the screw lock 42 a ring element 44 with on the ring element 44 arranged holding fingers 46 includes. In each case, a holding finger protrudes 46 at least in sections with a Haltefingerendabschnitt 48 in a mounting hole 38 into it.

Now the fixing screw 40 in the mounting hole 38 inserted and / or screwed, engages the Haltefingerendabschnitt 48 into the external thread of the fastening screw 40 one, leaving the fixing screw 40 positively in the mounting hole 38 can be positioned. In this way, for the multiple mounting holes 38 an integrally formed screw lock 42 provided in a simple way between the primary pulley 18 and the flange member 24 can be arranged and for each mounting hole 38 provides a screw lock. Due to the one-piece nature of the screw lock 42 can simplify fixing the fixing screws 40 in the attachment opening 38 until the final assembly of the vibration damper device 10 be provided on the crankshaft. In addition, the manufacturing process of the vibration damper device 10 be accelerated so that manufacturing costs can be reduced.

In 2 is a detailed view in longitudinal section of the 1 shown vibration damper device 10 shown. The fixing screw 40 is in the mounting hole 38 introduced and the Haltefingerendabschnitt 48 is engaged with the external thread of the fastening screw 40 to this form-fitting in the mounting hole 38 to fix.

The screw lock 42 and / or the holding fingers 46 are formed of a resilient, preferably rubber-like material. In this way, the retaining fingers, in particular the Haltefingerendabschnitt 48 , in the axial direction of the attachment opening 38 limited formed deformable. This can be advantageous for the assembly of the vibration damper device 10 be. During assembly, a centering pin (not shown) is preferably through the mounting holes 38 guided. The in the mounting holes 38 protruding holding fingers 46 make way for the centering pin. After removing the centering pin, the holding fingers are directed 46 in the radial direction. Due to the compliant trained screw lock 42 and / or holding fingers 46 can preferably damage the screw lock 42 be reduced during assembly of the vibration damper device 10.

In 3 is a plan view of the screw lock 42 with the holding fingers arranged in the radial direction 46 shown. The holding fingers 46 are in the radial direction outwards on the ring element 44 arranged, wherein the Haltefingerendabschnitte 48 at least in sections in the radial direction in the respective attachment opening 38 protrude.

The flange element 24 points to a disc element 14 and / or the primary disk 18 facing Flanschelementstirnseite 50 formed in the radial direction grooves 52 on, in which the holding fingers 46 at least in sections. In this way, the influence of the circlip on one, through the fixing screw 40 applied, contact pressure for fixing the disc element 14 be reduced to the crankshaft.

LIST OF REFERENCE NUMBERS

10

vibration damping means

12

Dual Mass Flywheel

14

disk element

16

axis of rotation

18

primary disc

20

spring element

22

secondary disc

24

flange

26

bearing dome

28

roller bearing

30

Outer peripheral surface bearing dome

32

Inner peripheral surface bearing dome

34

pilot bearing

36

pitch circle

38

fastening opening

40

fixing screw

42

threadlocking

44

ring element

46

holding fingers

48

Haltefingerendabschnitt

50

Flanschelementstirnseite

52

groove

Claims (4)

Vibration damper device (10) for torsional vibration damping between a crankshaft of an internal combustion engine and a Transmission input shaft of a motor vehicle transmission, comprising at least one disc element (14) for mounting on the crankshaft, and a flange element (24) arranged on the disc element (14), wherein the disc element (14) and the flange element (24) for fastening the disc element (14) on the crankshaft of the internal combustion engine in each case on a pitch circle (36) arranged mounting holes (38), between the disc element (14) and the flange (24) a screw lock (42) is arranged, which a ring element (44) with on the ring element ( 44) arranged holding fingers (46), and in each case a holding finger (46) projects at least in sections with a Haltefingerendabschnitt (48) in a mounting opening (38). Vibration damper device according to Claim 1 , characterized in that the screw lock (42) and / or the retaining fingers (46) are formed of a resilient material, and / or preferably comprise a rubber-like and / or plastic-like material. Vibration damper device according to Claim 1 or 2 , characterized in that the retaining fingers (46) in the radial direction inwardly and / or in the radial direction outwardly on the ring member (44) are arranged. Vibration damper device according to Claim 3 , characterized in that the disc element (14) on a flange element (24) facing Scheibenelementstirnseite and / or the flange (24) on a disc member (14) facing Flanschelementstirnseite (50) formed in the radial direction grooves (50), in which the retaining fingers (46) are guided at least in sections.

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