Start the device

Abstract

The present invention relates to a starting device for starting an internal combustion engine of a vehicle, comprising a starting element, a toothed carrier supported on a fixed housing and rotatable relative thereto, and a freewheel for transmitting torque between the starting element and a rotating component, the toothed carrier being connected to the starting element via tooth meshing for transmitting torque, the freewheel having a freewheel input and output elements rotatable about a rotation axis and connected to the toothed carrier, the two being coupled to each other via a clamping element for transmitting torque, the clamping element abutting a first abutment area on the freewheel output element for outputting torque toward the rotating component and abutting a second abutment area on the freewheel input element for absorbing torque, the first abutment area being radially arranged outside the second abutment area, and the freewheel output element being fastened to a connecting component connected to the rotating component and centered thereon via a centering section, the centering section comprising a first centering area on the freewheel output element and a second centering area on the connecting component extending concentrically therewith.

Description

Technical Field

[0001] The present invention relates to a starting device. Background Art

[0002] For example, a starting device is known from DE 10 2010 033 072 A1. This document describes a starting device designed as a permanently engaged starter, comprising a starter for generating torque for starting an internal combustion engine in a vehicle. The starter is connected to a starter ring gear for transmitting torque. The starter ring gear is accommodated on a ring gear carrier, which is connected to the crankshaft of the internal combustion engine via a freewheel. The freewheel comprises a freewheel outer ring fastened to the ring gear carrier and coupled to a freewheel inner ring via a clamping body, which in turn is fastened to a rotating component. Summary of the Invention

[0003] The object of the present invention is to improve the centering of a starting device. Furthermore, the starting device should be of simpler construction and easier to assemble. The torque transmission performance of the starting device should be increased.

[0004] At least one of the above-mentioned objectives is achieved by a starting device, wherein the centering of the starting device is improved, the torque transmission performance of the starting device is increased, and the starting device can be operated reliably and assembled more simply.

[0005] Possible deviations in the shape and orientation of the connecting component can be compensated by the centering section.

[0006] The starting device can be installed in a vehicle. The vehicle can be configured as a hybrid vehicle. The internal combustion engine can provide a driving torque for the vehicle's forward motion. The electric motor can generate another driving torque for the vehicle's forward motion.

[0007] The starting device can be designed as a permanently engaged starter (PES). The starting element can be permanently engaged relative to a rotating component of the internal combustion engine. The starting element can be designed as a starter, in particular an electrically operated starter. The rotating component can be designed as a crankshaft and / or a flywheel.

[0008] The starting element can have a rotatable starter shaft. The starter shaft can be connected to a drive pinion. The drive pinion can be connected to a starter ring gear via toothed engagement in a torque-transmitting manner. The starter ring gear can be accommodated on a tooth carrier, in particular in a torque-proof, preferably fixed connection. The tooth carrier can be a ring gear carrier. The tooth carrier can be fixedly connected to the freewheel input element, in particular in a one-piece configuration.

[0009] The toothed carrier and / or the freewheel input element can be supported on a stationary housing and can be accommodated rotatably relative thereto. The housing can be the engine housing of the internal combustion engine or be fixedly associated therewith.

[0010] The freewheel output element can be hardened at least in the first contact region. The freewheel input element can be hardened at least in the second contact region. The freewheel output element and / or the freewheel input element can be forged, stamped and / or milled.

[0011] At least two clamping elements can be arranged to act between the freewheel input element and the freewheel output element. The clamping elements can be arranged circumferentially spaced apart from one another. The clamping elements can be designed as clamping bodies and / or clamping rollers. The clamping elements can be arranged radially between the first and second contact areas. The clamping body can be non-circular and / or have a shape that deviates from a cylindrical shape. The material thickness of the clamping body can be smaller than at least one planar dimension of the clamping body. The clamping body can be designed in a disc-shaped manner. The clamping body can be rotatably accommodated in the freewheel housing. The freewheel housing can have at least two side plates arranged axially spaced apart from one another, between which the clamping elements are arranged. The freewheel housing can be axially fixed relative to the freewheel output element.

[0012] Centering between the freewheel output element and the connecting component can be assisted during assembly by means of a centering tool.

[0013] In a preferred embodiment of the present invention, the first contact area is formed on the inner circumference of the freewheel output element. The second contact area can be formed on the outer circumference of the freewheel input element. The first contact area and / or the second contact area can be the cylindrical outer surface of the respective freewheel output element or freewheel input element.

[0014] In a specific embodiment of the present invention, the connecting component is configured as a damper input component of a torsional vibration damper. The damper input component can have an arcuate spring channel for accommodating at least one spring element. The first centering region can be configured on the arcuate spring channel. The first centering region can be located radially inwardly of the spring element. The connecting component can be unhardened.

[0015] In a preferred embodiment of the present invention, the freewheel output element is riveted to the connecting component by at least one rivet element. The rivet element can be arranged radially overlapping the spring element of the torsional vibration damper. The rivet element can be formed integrally from the freewheel output element or the connecting component.

[0016] In a specific embodiment of the invention, the freewheel output element is pressed against the connecting component. The freewheel output element can be connected to the connecting component by a press fit. The press fit between the freewheel output element and the connecting component can be induced or strengthened by heat treatment.

[0017] The freewheel output element can be axially fixed relative to the connecting component by the axial fixing region. The axial fixing region can be stamped and formed as a material projection, in particular on the freewheel output element and / or the connecting component.

[0018] In a specific embodiment of the present invention, the freewheel output element has a pressing tooth system for pressing against the connecting component. The pressing tooth system can be arranged on the inner circumference and / or the outer circumference of the freewheel output element. The connecting component can alternatively or additionally have a pressing tooth system. The pressing tooth system can be designed as a cutting tooth system and / or a pressing tooth system.

[0019] The first centering region can be located in the axial direction toward the connecting component and between the connecting component and the pressure toothing. The first centering region can bring about self-centering of the freewheel output element when pressed by means of the connecting component.

[0020] In a specific embodiment of the invention, at least the freewheel output element and the connecting member form a first assembly, which is connected to a second assembly formed by at least the toothed carrier and the freewheel input element by fastening the connecting member to the rotating component. The second assembly can be accommodated in the housing before being fastened to the first assembly. The first assembly can be centered on the rotating component via the connecting member.

[0021] In a preferred embodiment of the invention, the freewheel output element is annular and accommodated on the inner circumference of the connecting component, wherein the second centering region is formed on the inner circumference of the connecting component. The second centering region can be located radially inside the spring element of the torsional vibration damper.

[0022] In a special embodiment of the invention, the freewheel output element is disk-shaped and the first centering region is formed on an axially bent section of the freewheel output element. The centering section can be arranged axially offset relative to the clamping element.

[0023] In a preferred embodiment of the invention, the freewheel output element is connected to the connecting component radially inside or outside the centering section. The centering section can be arranged radially outside the clamping element. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Further advantages and advantageous embodiments of the invention are apparent from the description and drawings of the figures.

[0025] The present invention is described in detail below with reference to the drawings.

[0026] Figure 1 A half-section view of a starting device in a specific embodiment of the present invention is shown.

[0027] Figure 2 Shown enlarged Figure 1 Part A in .

[0028] Figure 3 A half-section view showing a starting device in another specific embodiment of the present invention.

[0029] Figure 4 Shown enlarged Figure 3 Part B in.

[0030] Figure 5 A detail of a cross section of a starting device in a further special embodiment of the invention is shown in an exploded state.

[0031] Figure 6 A detail of a cross section of a starting device in a further special embodiment of the invention is shown in an exploded state.

[0032] Figure 7 A detail of a cross section of a starting device in another specific embodiment of the present invention is shown.

[0033] Figure 8 A detail of a cross section of a starting device in a further special embodiment of the invention is shown in an exploded state. DETAILED DESCRIPTION

[0034] Figure 1 A half section through a starting device 10 in a specific embodiment of the present invention is shown. The starting device 10 is provided for starting an internal combustion engine 12 in a vehicle and is designed as a permanently engaged starter (PES). The starting device 10 comprises a starting element (not shown here) designed as a starter, which is coupled to a rotating component 14 of the internal combustion engine 12. The starting element is connected to a starter ring gear 16 via toothed engagement. The starter ring gear 16 is accommodated in a rotationally fixed manner on a toothed carrier 18, in this case a ring gear carrier. The toothed carrier 18 is rotatably accommodated on a fixed housing 22, for example, the engine housing of the internal combustion engine 12, via a bearing element 20.

[0035] The torque provided by the starting element for starting the internal combustion engine 12 is transmitted via the starter ring gear 16 and the tooth carrier 18 to a freewheel 24, which is arranged on the tooth carrier 18 and the rotating component 14. The freewheel 24 includes a freewheel input element 28 rotatable about an axis of rotation 26 and accommodated in a rotationally fixed manner on the tooth carrier 18. The freewheel 24 also includes a freewheel output element 30, which is fixedly connected to a connecting component 32. To this end, the freewheel output element 30 is riveted to the connecting component 32 by means of a rivet element 34.

[0036] Connecting component 32 is designed as a damper input part 36 of a torsional vibration damper 38, in particular a dual-mass flywheel. Torsional vibration damper 38 includes at least one spring element 40, via which damper input part 36 is connected to a damper output part (not shown here) for damping torsional vibrations of internal combustion engine 12. Riveted element 34 is located radially at the level of spring element 40. Connecting component 32 is screwed to rotating component 14, for example, to the crankshaft of internal combustion engine 12.

[0037] The freewheel input element 28 is coupled to the freewheel output element 30 via at least one clamping element 42, preferably via a plurality of clamping elements arranged circumferentially spaced apart from one another, for the purpose of transmitting torque between the starting element and the rotating component 14. The freewheel 24, via the clamping element 42, thereby effects a torque transmission between the starting element and the rotating component 14 in the direction of the rotating component 14 and prevents a torque transmission in the opposite direction.

[0038] For torque transmission, the clamping element 42 abuts against a first abutment area 44 on the freewheel output element 30 to output torque to the connecting component 32, and abuts against a second abutment area 45 on the freewheel input element 28 to absorb torque from the toothed carrier 18. The first abutment area 44 is provided on the inner circumference of the freewheel output element 30, and the second abutment area 46 is provided on the outer circumference of the freewheel input element 28.

[0039] The first contact area 44 is arranged radially outside the second contact area 46. As a result, the torque transmitted by the starting element to the rotating component 14 is introduced radially inwardly into the freewheel 24 and is output radially outwardly from the freewheel 24. This arrangement of the freewheel 24, which is contrary to the prior art, enables simple installation of the starting device 10.

[0040] The connecting component 32 together with the freewheel output element 30 forms a first assembly 48, and the toothed carrier 18 together with the freewheel input element 28 forms a second assembly 50. The second assembly 50 is pre-assembled and received on the housing 22 and connected to the first assembly 48 by screwing the connecting component 32 to the rotating component 14.

[0041] The respective clamping element 42 is designed as a clamping body 52, which is accommodated in a freewheel housing 54 formed by two side plates 56 arranged axially spaced apart from one another. The two side plates 56 bear against the freewheel output element 30 in an axially prestressed manner, thereby ensuring that the freewheel housing 54 is axially fixed to the freewheel output element 30 by means of the clamping body 52.

[0042] exist Figure 2 Shown enlarged Figure 1Detail A in FIG. The freewheel output element 30 is disk-shaped and centered via a centering section 58 , which comprises a first centering region 60 on the freewheel output element 30 and a second centering region 62 on the connecting component 32 extending concentrically therewith. This allows starting device 10 to be centered more reliably and more easily. The better oriented clamping body 52 between the freewheel input element and the freewheel output element 30 improves the torque transmission performance of starting device 10 , and in particular of freewheel 24 .

[0043] The freewheel output element 30 has an axially bent section 64, on which a first centering region 60 is formed for contact with a second centering region 62. The first centering region 60 is arranged radially outside the second centering region 62. The centering section 58 is located radially outside the spring element 40 of the torsional vibration damper 38.

[0044] Figure 3 A half-section view of a starting device 10 in another specific embodiment of the present invention is shown. Figure 1 , however, the freewheel output element 30 is annular in this case and is accommodated centrally on the inner circumference of the connecting component 32 and is fixedly connected thereto.

[0045] The connecting component 32 is formed integrally with the damper input part 36. The damper input part 36 includes an arcuate spring channel 66 that accommodates the spring element 40. The second centering region 62 is formed radially inwardly of the spring element 40 on the inner circumference of the arcuate spring channel 66. Any deviations in the geometry or arrangement of the arcuate spring channel 66 can be compensated by the shaping and arrangement of the second centering region 62.

[0046] The connecting component 32 has an axially bent section 68 radially inwardly, by which the connecting component 32 is received centered on the rotating component 14 . The first mounting component 48 is thus centered relative to the second mounting component 50 via the centering of the connecting component 32 .

[0047] exist Figure 4 Shown enlarged Figure 3 The centering section 58 is formed by a first centering region 60 of the freewheel output element 30 and a radially outer second centering region 62 of the connecting component 32 . The freewheel output element 30 is pressed against the connecting component 32 .

[0048] Figure 5A detail of a cross section of a starting device 10 in a disassembled state is shown in another specific embodiment of the present invention. The freewheel output element 30 has a pressing tooth system 70 for pressing against the connecting member 32. The pressing tooth system 70 is arranged on the outer circumference of the freewheel output element 30 and is designed as a cutting tooth system. The first centering region 60 is axially oriented toward the connecting member 32 and is arranged between the connecting member 32 and the pressing tooth system 70.

[0049] For fastening to the connecting member 32, the freewheel output element 30 is pushed onto the connecting member in a centered manner via the first and second centering regions 60, 62 and fixedly connected thereto via the pressing teeth 70. Thus, self-centering of the freewheel output element 30 can be achieved when pressed against the connecting member 32.

[0050] exist Figure 6 A detail of a cross section of a starting device 10 according to another specific embodiment of the present invention is shown in FIG. The pressing toothing 70 has a tooth chamfer 72 for easier fastening of the freewheel output element 30 to the connecting component 32 .

[0051] Figure 7 A detail of a cross section through a starting device 10 in another specific embodiment of the invention is shown. The freewheel output element 30 is additionally axially fixed relative to the connecting component 32 by an axial fixing region 74. The axial fixing region 74 is stamped into the connecting component 32 and is designed as a material projection of the connecting component 32, which fixes the freewheel output element 30 axially to the connecting component 32.

[0052] exist Figure 8 shows a detail of a cross section of a starting device 10 in a disassembled state according to another specific embodiment of the present invention. The freewheel output element 30 is fastened to the connecting component 32 with the aid of a centering tool 76, which is placed on the freewheel output element 30 and, via it, guides the freewheel output element 30 in a centered manner toward the connecting component 32. The freewheel output element 30 is pushed onto the connecting component 32 and fixedly connected thereto via the pressing toothing 70.

[0053] Reference Signs List

[0054] 10. Start the device

[0055] 12 Internal combustion engine

[0056] 14 Rotating components

[0057] 16 Starting ring gear

[0058] 18 Gear bearing

[0059] 20 Support element

[0060] 22 housing

[0061] 24 Freewheel

[0062] 26 Rotation axis

[0063] 28 Freewheel input element

[0064] 30 Freewheel output element

[0065] 32 Connecting components

[0066] 34 Riveting elements

[0067] 36 Shock absorber input

[0068] 38 Torsional vibration damper

[0069] 40 Spring element

[0070] 42 Clamping elements

[0071] 44 First docking area

[0072] 46 Second docking area

[0073] 48 First Assembly Component

[0074] 50 Second assembly component

[0075] 52 Clamping body

[0076] 54 Freewheel housing

[0077] 56 side panels

[0078] 58 Centering section

[0079] 60 First centering area

[0080] 62 Second centering area

[0081] 64 sections

[0082] 66 Arc Spring Channel

[0083] 68 sections

[0084] 70 Press the teeth

[0085] 72 tooth chamfer

[0086] 74 Axial fixing area

[0087] 76 Centering tool

Claims

1. A starting device (10) for starting an internal combustion engine (12) in a vehicle, comprising: a starting element for introducing a torque toward a rotating component (14) of the internal combustion engine (12) for a starting process thereof; a toothed carrier (18) supported on a fixed housing (22) and rotatable relative to the housing, the toothed carrier being connected to the starting element via toothed engagement in a torque-transmitting manner; A freewheel (24) is provided for transmitting torque between the starting element and the rotating component (14), the freewheel comprising a freewheel input element (28) and a freewheel output element (30) which are rotatable about an axis of rotation (26) and connected to the toothed carrier (18), the freewheel input element and the freewheel output element being coupled to each other via at least one clamping element (42) for transmitting torque, the clamping element abutting a first abutment area (44) on the freewheel output element (30) for outputting torque toward the rotating component (14) and abutting a second abutment area (46) on the freewheel input element (28) for absorbing torque, It is characterized by: The first abutment area (44) is arranged radially outside the second abutment area (46), and The freewheel output element (30) is fastened to a connecting member (32) connected to the rotating member (14) and is centered on the connecting member via a centering section (58), the centering section comprising a first centering area (60) on the freewheel output element (30) and a second centering area (62) on the connecting member (32) extending concentrically with the first centering area.

2. The starting device (10) according to claim 1, characterized in that The first contact area (44) is formed on the inner circumference of the freewheel output element (30).

3. The starting device (10) according to claim 1 or 2, characterized in that The connecting component (32) is designed as a damper input element (36) of a torsional vibration damper (38).

4. The starting device (10) according to claim 1 or 2, characterized in that The freewheel output element (30) and the connecting component (32) are riveted together by at least one riveting element (34).

5. The starting device (10) according to claim 1 or 2, characterized in that The freewheel output element (30) is pressed against the connecting component (32).

6. The starting device (10) according to claim 5, characterized in that The freewheel output element (30) has a pressing tooth portion (70) for pressing onto the connecting component (32).

7. The starting device (10) according to claim 1 or 2, characterized in that At least the freewheel output element (30) and the connecting member (32) form a first assembly (48), which is connected to a second assembly (50) formed at least by the toothed carrier (18) and the freewheel input element (28) via the fastening of the connecting member (32) to the rotating member (14).

8. The starting device (10) according to claim 1 or 2, characterized in that The freewheel output element (30) is annular in shape and is accommodated on the inner circumference of the connecting component (32), wherein the second centering region (62) is formed on the inner circumference of the connecting component (32).

9. The starting device (10) according to claim 1 or 2, characterized in that The freewheel output element (30) is disk-shaped, and the first centering region (60) is formed on an axially bent section (64) of the freewheel output element (30).

10. The starting device (10) according to claim 1 or 2, characterized in that The freewheel output element (30) is connected to the connecting component (32) radially inside or outside the centering section (58).

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