DE102020127936A1 - Starter device with a freewheel - Google Patents

Abstract

The invention relates to a starter device (10) for starting an internal combustion engine (12) in a vehicle, having a starter element for introducing a torque transmitted along a torque path (42) to a rotary component (24) of the internal combustion engine (12) for its starting process, a toothed carrier (16) mounted on a fixed housing (20) and rotatable relative to this, which is connected to the starter element in a torque-transmitting manner via toothing engagement, a freewheel (22) arranged for torque transmission between the starter element and the rotating component (24) with a one-way clutch Axis of rotation (39) rotatable freewheel input element (26) and a freewheel output element (28) coupled to the rotating component (24) and at least one movable clamping element (40) which is used to transmit torque to the freewheel input element (26) at a torque introduction point (50) and to output the Torque towards the rotating member (24) on the free running output element (28) rests against a torque discharge point (52), the torque introduction point (50) being arranged radially inside of the torque discharge point (52).

Description

The invention relates to a starter device according to the preamble of claim 1.

A starter device is off, for example DE 10 2010 033 072 A1 known. It describes a starter device designed as a permanently engaged starter, which transmits a torque from a starter, via a starter ring gear, a ring gear carrier and a freewheel to a crankshaft of the internal combustion engine to start an internal combustion engine. The ring gear carrier is rotatably mounted on a fixed motor housing and receives the starter ring gear radially outside of the freewheel. The freewheel comprises a freewheel input element made in one piece with the ring gear carrier and a freewheel output element coupled to the latter via clamping elements for torque transmission. The clamping element is coupled radially on the outside to the freewheel input element and radially on the inside to the freewheel output element.

The object of the present invention is to reduce the manufacturing effort and the assembly effort of a starter device. Furthermore, the torque transmission capacity of the starter device should be increased and the starter device should be designed to be more cost-effective.

At least one of these objects is achieved by a starter device having the features according to claim 1. As a result, the production cost of the starter device can be reduced and the starter device can be installed more easily.

The starter device can be installed in a vehicle. The vehicle can be designed as a hybrid vehicle. The internal combustion engine can provide a drive torque for locomotion of the vehicle. An electric motor can produce a further drive torque for locomotion of the vehicle.

The starter element can be permanently engaged with respect to the rotating component of the internal combustion engine. The starter device can be designed as a permanently engaged starter (PES). The starter element can be designed as an, in particular electrically operated, starter.

The starter element may have a rotatable starter shaft. The starter shaft can be connected non-rotatably to a drive pinion. The drive pinion can be connected to a starter ring gear via a toothing engagement in a torque-transmitting manner. The starter ring gear can be held non-rotatably on the gear carrier. The gear carrier can be a ring gear carrier.

The toothing carrier and / or the freewheel input part can be mounted on a fixed housing, in particular via a bearing element, and can be rotatably received with respect to this. The housing can be a motor housing of the internal combustion engine or it can be permanently assigned to it. The toothing carrier can be connected to the freewheel input element, in particular made in one piece.

The freewheel output element can be centered on the connection component. The freewheel output element can be firmly connected, preferably riveted, to the connection component.

The rotating component can be designed as a crankshaft and / or a flywheel.

At least two clamping elements can be effectively arranged between the freewheel input element and the freewheel output element. The clamping elements can be arranged at a distance from one another on the circumferential side.

The clamping element can be arranged axially between the toothing carrier and the connection component. The toothing carrier can be arranged axially next to and radially overlapping with respect to the clamping element.

In a preferred embodiment of the invention, the freewheel output element is received on a connection component that is embodied separately therefrom and also separately from the rotary component. The connection component can be designed as a damper input part of a torsional vibration damper. The freewheel can be arranged so as to overlap axially with respect to the torsional vibration damper.

In a special embodiment of the invention, the freewheel output element is connected to the connection component radially outside of the torque introduction point and the torque discharge point. The freewheel output element can be riveted to the connection component, in particular by means of at least one rivet element.

In a further special embodiment of the invention, at least the clamping element, the freewheel output element and the connection component form a first assembly group which is centered on and fastened to the rotary component via the connection component. As a result, the number of fastening points when assembling the starter device can be reduced. The first assembly may include the torsional vibration damper.

In a special embodiment of the invention, at least the toothing carrier and the freewheel input element form a second assembly group and the first and second assembly group are connected to one another via the fastening of the connection component with the rotating component. As a result, the axial installation space at the fastening point of the starter device with the rotating component can be reduced. The second assembly can be preassembled on the housing when it is attached to the first assembly.

In a special embodiment of the invention, the torque is transmitted along the torque path via the freewheel output element and the connecting component connected in series to the rotary component. The freewheel input element can be arranged radially between the freewheel output element and the rotating component.

In a preferred embodiment of the invention, the torque introduction point and the torque discharge point are arranged axially overlapping. The torque introduction point and / or the torque discharge point can be arranged so as to overlap axially with respect to the starter ring gear.

In a preferred embodiment of the invention, the toothing engagement is arranged radially outside of the torque introduction point and the torque discharge point. The toothing engagement can lie radially outside of the connection point between the freewheel output element and the connection component.

In a preferred embodiment of the invention, the freewheel input element is designed as a freewheel inner ring and the freewheel output element is designed as a freewheel outer ring. The clamping element can be received on the freewheel outer ring, in particular rotatable with it and / or axially secured on it.

In a preferred embodiment of the invention, the clamping element is designed as a clamping body pivotable about an axis of rotation. The clamping element can be movably received in a freewheel housing. The freewheel housing can be fixed to the freewheel output element. The freewheel housing can have at least two axially spaced apart side plates, between which the clamping element is introduced. The clamping element can have a recess for receiving a connecting bolt for mounting the clamping element on the freewheel housing. The clamping element can be movable to a limited extent within the freewheel housing, in particular in an axial direction and / or at least one direction perpendicular thereto.

A maximum extension of the clamping element, in particular perpendicular to the axis of rotation, is preferably greater than a distance between the torque introduction point and the torque discharge point. Thereby the clamping and the torque transmission can be effected.

The clamping element can be designed in the form of a disk. The clamping element can be hardened. The clamping element can rest at the torque introduction point with a first contact area on the freewheel input element and at the torque output point with a second contact area on the freewheel output element. The first and / or second contact area can have a contour that deviates from the circular shape, for example a spiral shape. The first and / or second contact area can have at least two different radii of curvature.

Further advantages and advantageous configurations of the invention emerge from the description of the figures and the illustrations.

• 1: Einen Halbschnitt einer Startervorrichtung in einer speziellen Ausführungsform der Erfindung.
• 2: Einen Halbschnitt einer Startervorrichtung in einer weiteren speziellen Ausführungsform der Erfindung.
• 3: Eine Seitenansicht eines Klemmelements einer Startervorrichtung in einer weiteren speziellen Ausführungsform der Erfindung.

The invention is described in detail below with reference to the figures. They show in detail:

• 1 : A half section of a starter device in a special embodiment of the invention.
• 2 : A half section of a starter device in a further special embodiment of the invention.
• 3 : A side view of a clamping element of a starter device in a further special embodiment of the invention.

1 shows a half section of a starter device 10 in a special embodiment of the invention. The starter device 10 is a permanently engaged starter for starting an internal combustion engine 12th arranged in a vehicle. The vehicle can be designed as a hybrid vehicle in which the internal combustion engine 12th a first drive torque and an electric motor provides a second drive torque in each case for locomotion of the vehicle.

The starter device 10 comprises a starter element, not shown here, for example a starter, which converts electrical energy into kinetic energy for the starting process of the internal combustion engine 12th can be converted. The torque provided by the starter element for starting the internal combustion engine 12th is geared to mesh with a starter ring gear 14th transfer. The starter ring gear 14th is on a gear carrier 16 , for example a ring gear carrier, recorded in a rotationally fixed manner. The gear carrier 16 turn is via a bearing element 18th rotatable with respect to a fixed housing 20th , for example a motor housing of the internal combustion engine 12th , stored.

That of the gear carrier 16 The transmitted torque is via a downstream freewheel 22nd on a rotating component 24 the internal combustion engine 12th transferred and thereby the internal combustion engine 12th started. The freewheel 22nd includes a freewheel input element 26th , which rotates with the gear carrier 16 connected is. Furthermore, the freewheel 22nd a freewheel output element 28 on, which with a connection component 30th through rivet elements 32 is riveted. The connection component 30th is used as a damper input part 34 a torsional vibration damper 36 , for example a two-mass flywheel executed. The torsional vibration damper 36 includes spring elements 38 for the elastic connection between the damper input part 34 and a downstream damper output part, not shown here. The connection component 30th is with the rotating member 24 screwed.

That around an axis of rotation 39 rotatable freewheel input element 26th is over several circumferentially spaced apart clamping elements 40 with the freewheel output element 28 coupled for torque transmission. In this case, the torque provided by the starter element is along a torque path 42 about the freewheel 22nd and through the clamping elements 40 towards the rotating component 24 transfer. A torque transfer in the opposite direction along the torque path 42 is due to the freewheel 22nd , especially through the clamping elements 40 , prevented. This allows the starter to be permanently connected to the gear carrier 16 be connected, so even when the internal combustion engine is running 12th .

The single clamping element 40 is as a clamp body 44 executed and is on a freewheel housing 46 movably received and depending on its movement, the torque is in the direction of the rotating component 24 through the freewheel 22nd transmitted and interrupted away from this in the direction of the starter element. The freewheel housing 46 comprises two side plates which are axially spaced apart from one another 48 . The clamping element 40 is axially between the side windows 48 arranged and via a bearing roller opposite the freewheel housing 46 rotatable. The side windows 48 are on the freewheel output element 28 axially secured. The freewheel housing 46 is the freewheel output element 28 assigned.

The clamping element 40 is located on the freewheel input element for torque transmission 26th at a torque introduction point 50 and for outputting the torque to the freewheel output element 28 at a torque discharge point 52 at. The torque introduction point 50 lies radially inward of the torque discharge point 52 . This allows the starter device 10 are easier to set up and assemble

The freewheel input element 26th is as a freewheel inner ring 54 executed and the freewheel output element 28 is as a freewheel outer ring 56 executed. The freewheel output element 28 is via the connection component 30th centered and with this outside of the clamping element 40 , as well as outside of the torque introduction point 50 and the torque discharge point 52 through the rivet elements 32 riveted. Here are the rivet elements 32 radially at the level of the spring elements 38 the torsional vibration damper 36 arranged. The gear carrier 16 is axially next to the clamping element 40 and arranged radially overlapping to this.

The clamping elements 40 , the freewheel housing 46 , the freewheel output element 28 and the connection component 30th with the torsional vibration damper 26th form a first assembly 58 and the gear carrier 16 with the starter ring gear 14th , the bearing element 18th and the one-way input element 26th form a second assembly 60 . The first and second assemblies 58 , 60 by screwing the connection component 30th on the rotating member 24 firmly connected to each other. Here is the second assembly 60 already on the case 20th about the bearing element 18th pre-assembled.

The first assembly 58 is via the connection component 30th on the rotating component 24 centered. This allows the starter device 10 are easier to assemble and the number of components can be reduced. Furthermore, the axial installation space in the area of the fastening with the rotating component 24 be reduced.

In 2 is a half section of a starter device 10 shown in a further special embodiment of the invention. The freewheel output element 28 is as a freewheel outer ring 56 executed on the connection component 30th centered and attached. For this purpose, the connection component 30th a centering section 62 on, the radially inside the spring elements 38 the torsional vibration damper 36 lies. The damper output part 64 is axially next to the connection component 30th forming damper input part 34 arranged.

The torque introduction point 50 and the torque discharge point 52 are arranged axially overlapping. The torque discharge point 52 lies radially inside the spring elements 38 the torsional vibration damper 36 .

3 shows a side view of a clamping element 40 a starter device in a further special embodiment of the invention. That as a clamp body 44 executed disc-shaped clamping element 40 is around an axis of rotation 66 pivotable radially between the freewheel input member 26th and the freewheel output element 28 arranged.

A maximum extension 68 of the clamping element 40 , in particular perpendicular to the axis of rotation 66 , is preferably greater than a distance 70 between the torque introduction point 50 and the torque discharge point 52 . This allows the clamping and the torque transmission via the clamping element 40 be effected starting from the starter element towards the rotating component.

List of reference symbols

10

Starter device

12th

Internal combustion engine

14th

Starter ring gear

16

Gear carrier

18th

Bearing element

20th

casing

22nd

Freewheel

24

Rotary component

26th

Freewheel input element

28

Freewheel output element

30th

Connection component

32

Rivet element

34

Damper input part

36

Torsional vibration damper

38

Spring element

39

Axis of rotation

40

Clamping element

42

Torque travel

44

Sprags

46

Freewheel housing

48

Side window

50

Torque introduction point

52

Torque discharge point

54

Freewheel inner ring

56

Freewheel outer ring

58

first assembly

60

second assembly

62

Centering point

64

Damper output part

66

Axis of rotation

68

Extension

70

distance

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 102010033072 A1 [0002]

Claims (10)

Starter device (10) for starting an internal combustion engine (12) in a vehicle, comprising a starter element for introducing a torque transmitted along a torque path (42) to a rotary component (24) of the internal combustion engine (12) for its starting process, one on a fixed one Housing (20) mounted and opposite to this rotatable toothing carrier (16), which is connected to the starter element via a toothing engagement to transmit torque, a freewheel (22) arranged for torque transmission between the starter element and the rotating component (24) and having a free wheel about an axis of rotation (39) rotatable freewheel input element (26) and a freewheel output element (28) coupled to the rotating component (24) and at least one movable clamping element (40) which is used to transmit torque to the freewheel input element (26) at a torque introduction point (50) and to deliver the torque to the Rotary component (24) on the freewheel output element (28) a torque discharge point (52), characterized in that the torque introduction point (50) is arranged radially inside of the torque discharge point (52). Starter device (10) after Claim 1 , characterized in that the freewheel output element (28) is received on a connection component (30) which is embodied separately therefrom and also separately from the rotary component (24). Starter device (10) after Claim 2 , characterized in that the freewheel output element (28) is connected to the connection component (30) radially outside of the torque introduction point (50) and the torque discharge point (52). Starter device (10) after Claim 2 or 3 , characterized in that at least the clamping element (40), the freewheel output element (28) and the connection component (30) form a first assembly group (58) which is centered on the connection component (30) on the rotating component (24) and fastened thereto. Starter device (10) after Claim 4 , characterized in that at least the toothing carrier (16) and the freewheel input element (26) form a second assembly group (60) and the first and second assembly group (58, 60) together via the fastening of the connection component (30) to the rotary component (24) are connected. Starter device (10) according to one of the Claims 2 to 5 , characterized in that the torque is transmitted along the torque path (42) via the freewheel output element (28) and the connecting component (30) connected in series to the rotary component (24). Starter device (10) according to one of the preceding claims, characterized in that the torque introduction point (50) and the torque discharge point (52) are arranged to overlap axially. Starter device (10) according to one of the preceding claims, characterized in that the toothing engagement is arranged radially outside of the torque introduction point (50) and the torque discharge point (52). Starter device (10) according to one of the preceding claims, characterized in that the freewheel input element (26) is designed as a freewheel inner ring (54) and the freewheel output element (28) is designed as a freewheel outer ring (56). Starter device (10) according to one of the preceding claims, characterized in that the clamping element (40) is designed as a clamping body (44) which can be pivoted about an axis of rotation (66).

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