Starter equipment with compensation equipment

Abstract

The invention relates to a starter device (10) for starting an internal combustion engine, having a starter element (16) for introducing a torque into a rotary member (12) of the internal combustion engine, which is rotatable about an axis of rotation (A), for a starting process of the internal combustion engine, a housing member (30) associated with a stationary housing (14), a toothed member (26) rotatable relative to the housing member (30) and connected to the starter element (16) via a torque-transmitting toothing (24), a carrier member (28) connected in a torque-proof manner to the toothed member (26) and accommodating the toothed member, a one-way clutch (32) which causes torque transmission from the starter element (16) to the rotary member (12) and inhibits torque transmission in the opposite direction, and which has a first one-way clutch element (44) and a second one-way clutch element (46) coupled to the first one-way clutch element via at least one clamping body (40), wherein a compensation device (50) is provided between the carrier member (28) and the rotary member (12) for providing radial movability between the housing member (30) and the rotary member (12).

Description

Technical Field

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

[0002] DE 10 2013 020 327 A1 describes a starter device designed as a permanently engaged starter and having a starter for starting an internal combustion engine and a freewheeling clutch with a first race and a second race. The first race is connected to the crankshaft of the internal combustion engine. A clamping body for selectively enabling or interrupting torque transmission is arranged between the first and second races. The second race is supported radially and axially on a stationary housing via a radial bearing designed as a dry sliding bearing. Summary of the Invention

[0003] The object of the present invention is to design a starter device more reliably and at lower cost. The loads acting on the starter device should be reduced. The starter device should be better supported. The loads on the starter device caused by temperature changes should be reduced.

[0004] This allows the starter device to be designed more reliably and cost-effectively. Axis misalignment between the rotating component and the housing component can be compensated for. The loads on the freewheel caused by axial and longitudinal forces can be reduced. The loads caused by temperature changes can also be reduced.

[0005] The central axis of the housing component can be moved relative to the rotation axis with an axis offset. The axis offset between the housing component and the rotation component can be compensated via a compensation device.

[0006] The starter device can be installed in a vehicle. The vehicle can be configured as a hybrid vehicle. In addition to the internal combustion engine, the electric motor can generate another drive torque for the forward movement of the vehicle.

[0007] The starter device can be designed as a permanently engaged starter (PES). The starter element can be permanently engaged with respect to a rotating component of the internal combustion engine. The starter element can have a rotatable starter shaft arranged parallel to the axis of rotation. The starter element can transmit the torque required for the starting process via the starter shaft and the toothed component to the rotating component.

[0008] The rotating component can be designed as a crankshaft, a flywheel and / or a damper input element of a torsional vibration damper, for example a dual-mass flywheel.

[0009] The housing can be the engine housing of an internal combustion engine or be fixedly associated with the engine housing. The housing component can be formed integrally from the housing or connected thereto. The housing component can have a radially extending section that extends axially alongside the support component. The housing component can be arranged on the same axial side of the support component as the starter element.

[0010] The toothed component may be disposed radially outside the load-bearing component. The toothed component may be integrally formed with the load-bearing component. The toothed component may be connected to the load-bearing component by force fit, form fit, and / or material fit. The toothed component may be connected to the load-bearing component by a press fit. The toothed component may be welded to the load-bearing component. The toothed component may be configured as a ring gear. The toothed component may be coaxially disposed with a negligible axis offset relative to the rotating component.

[0011] The bearing component can be configured as a tooth bearing. The bearing component can be arranged to radially overlap with the housing component. The bearing component can be arranged to axially and / or radially overlap with the tooth component.

[0012] The one-way clutch can be arranged axially overlapping or axially offset from the toothing. The clamping body can be designed as a clamping roller. The clamping body can have a shape other than a cylinder. The clamping body can be arranged radially between the first and second one-way clutch elements. The clamping body can directly abut the first and / or second one-way clutch elements. The clamping body can be inserted axially between the side plates of the one-way clutch.

[0013] The load-bearing component can be supported on the housing component via a support element. The support element can be configured as a rolling bearing and / or a sliding bearing. The support element can be arranged to radially overlap the compensating device. The load acting on the support element due to radial forces can be reduced by the compensating device.

[0014] The first one-way clutch element can be centered relative to the second one-way clutch element by a centering mechanism. The centering mechanism can be designed separately from the clamping body.

[0015] The first one-way clutch element can be axially fixed relative to the second one-way clutch element by a fixing mechanism. The fixing mechanism can be formed by a one-way clutch side plate.

[0016] The first one-way clutch element can be supported relative to the second one-way clutch element via a supporting element. The supporting element can be a rolling bearing or a sliding bearing.

[0017] The one-way clutch can be connected to the rotating member via a transmission element. The transmission element can be an axially flexible plate, in particular a flexible disk. The transmission element can be arranged axially offset from the one-way clutch.

[0018] The compensating device can be arranged to transmit torque. The torque transmission can bypass the compensating device. The compensating device can be arranged to axially overlap with the one-way clutch.

[0019] The compensating device can axially fix the component connected thereto. The compensating device can have a greater rigidity in the axial direction than in the radial direction. This allows radial mobility without damaging the one-way clutch.

[0020] In a preferred embodiment of the present invention, the compensating device includes a toothed section that allows radial mobility. The toothed section may include a noise reduction element for reducing noise generated by the toothed section. Noise may be generated by the radial mobility of the toothed section. The noise reduction element may be configured as a polygonal ring. The toothed section may be formed of an internal toothed section and an external toothed section. The internal toothed section may be configured on the first one-way clutch element. The external toothed section may be configured on the carrier member or on the second one-way clutch element.

[0021] In a specific embodiment of the present invention, the compensation device includes a radially flexible connecting element. The connecting element may be disc-shaped. The connecting element may include a recess that reduces the radial stiffness of the connecting element relative to radial forces. The connecting element may be a flexible plate. The connecting element may have a lower radial stiffness than a similar component constructed of solid material of the same material.

[0022] In another specific embodiment of the present invention, the compensating device additionally provides axial mobility between the housing component and the rotating component. The one-way clutch, in particular the second one-way clutch element, can be connected to the rotating component or the transmission element in an axially movably manner via the compensating device. The compensating device can include a sliding bearing.

[0023] The compensating device can have a spur toothing, via which the axial displacement is achieved. The spur toothing can be arranged between the second one-way clutch element and the transmission element. This can reduce the axial load acting on the one-way clutch.

[0024] In a preferred embodiment of the present invention, the compensating device connects the one-way clutch to the toothed component in a radially movably manner. The compensating device can connect the one-way clutch to the carrier component in a radially movably manner.

[0025] In a specific embodiment of the invention, the compensating device is preferably arranged between the toothed component and the first one-way clutch element in a torque-transmitting manner. The compensating device can be arranged radially inside the clamping body.

[0026] In another specific embodiment of the invention, the compensating device is preferably arranged in a torque-transmitting manner between the carrier member and the first one-way clutch element.The first one-way clutch element can be radially movable relative to the carrier member via the compensating device.

[0027] In a preferred embodiment of the present invention, the compensating device is arranged between the second one-way clutch element and the rotating member. The second one-way clutch element can be radially movable relative to the rotating member via the compensating device. The compensating device can be arranged directly between the second one-way clutch element or the one-way clutch side plate and the transmission element.

[0028] In a specific embodiment of the invention, the compensating device is arranged between the shell component and the load-bearing component. The compensating device may surround the supporting element between the shell component and the load-bearing component.

[0029] In a preferred embodiment of the present invention, the first one-way clutch element is configured as a one-way clutch inner ring, and the second one-way clutch element is configured as a one-way clutch outer ring. The one-way clutch outer ring is arranged radially outside the one-way clutch inner ring.

[0030] Further advantages and advantageous embodiments of the invention are apparent from the description and figures of the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be described in detail below with reference to the accompanying drawings.

[0032] Figure 1 A half section of a starter device in a specific embodiment of the present invention is shown.

[0033] Figure 2 A detail of a cross section of a starter device in another specific embodiment of the present invention is shown.

[0034] Figure 3 A detail of a cross section of a starter device in another specific embodiment of the present invention is shown.

[0035] Figure 4 A detail of a cross section of a starter device in another specific embodiment of the present invention is shown.

[0036] Figure 5 Shown along Figure 4 A partial side view of AA in FIG. DETAILED DESCRIPTION

[0037] Figure 1 A half section through a starter device of a specific embodiment of the present invention is shown. Starter device 10 is installed in a motor vehicle and is designed as a permanently engaged starter (PES) and, for a starting process for starting an internal combustion engine of the motor vehicle, induces a torque on a rotating component 12 of the internal combustion engine, such as a crankshaft, which is rotatable about an axis of rotation A.

[0038] Torque is provided by a starter element 16 fixed to a housing 14, such as the motor housing of an internal combustion engine. The starter element has an electric motor 18 for converting electrical energy into kinetic energy. This kinetic energy is applied as torque to a starter shaft 20, which is rotationally fixedly connected to the rotor of the electric motor 18, and a gear 22, which is also rotationally fixedly connected thereto. Gear 22 is connected to a toothed component 26 via teeth 24 to transmit the torque. Toothed component 26 is preferably designed as a ring gear and is rotationally fixedly connected, for example, welded, to a carrier component 28. Carrier component 28 is preferably designed as a toothed carrier, particularly a carrier ring.

[0039] Starter element 16 is fixed to a housing component 30 associated with stationary housing 14, for example, by screwing or riveting. Housing component 30 extends axially alongside carrier component 28. The torque generated by starter element 16 for starting the internal combustion engine is transmitted via toothed component 26, carrier component 28, and a downstream freewheel 32 to a transmission element 34 fixed to rotating component 12. Transmission element 34 is designed as an axially flexible plate, in particular a flexible disk, and is connected to rotating component 12 on the output side via a threaded connection 36 and a further threaded connection 38.

[0040] The one-way clutch 32 is axially arranged between the carrier member 28 and the transmission element 34 and includes a clamping body 40, for example, a clamping roller, which is movably received between axially spaced one-way clutch side plates 42. The one-way clutch 32 has a first one-way clutch element 44, here a one-way clutch inner ring, which is fixedly connected to the carrier member 28, and a second one-way clutch element 46, here a one-way clutch outer ring, which is fixedly connected to the one-way clutch side plates 42. The clamping body 40 is radially arranged between the first and second one-way clutch elements 44, 46.

[0041] The clamping body 40 can bring about a torque transmission from the starter element 16 to the rotating component 12 and prevents a torque transmission in the opposite direction due to the rotatability between the first freewheel element 44 and the second freewheel element 46. As a result, the starter element 16 can be permanently engaged via the gearwheel 22 and the toothed component 26, that is, even when the internal combustion engine is running.

[0042] The carrier component 28 is supported on the housing component 30 via a bearing element 48. The bearing element 48 is designed, in particular, as a rolling bearing. If there is radial play between the housing 14 and the rotating component 12 or if there is an axial offset between the rotating component 12 rotatable about the rotation axis A and the housing 14 or the housing component 30, the bearing element 48 and the one-way clutch 32 may be excessively loaded, and the durability and function of the components may be impaired.

[0043] A compensating device 50 is provided between the carrier member 28 and the rotating member 12 for providing radial movability between the housing member 30 and the rotating member 12. The compensating device 50 has a first compensating element 52 which is provided between the carrier member 28 and the first one-way clutch element 44 and which causes radial movability between the one-way clutch 32 and the carrier member 28 and thus between the rotating member 12 and the housing member 30.

[0044] The first one-way clutch element 52 is provided for transmitting a torque transmitted from the starter element 16 to the rotating component 12 for starting the internal combustion engine. The first one-way clutch element 52 is oriented axially overlapping the clamping body 40 and radially overlapping the support element 48 .

[0045] In order to reliably maintain the freewheel function due to the radial mobility caused by the first compensating element 52 and to ensure the orientation of the clamping body 40 within the freewheel 32, the first freewheel element 44 is preferably radially centered relative to the second freewheel element 46 and is supported, in particular, via a sliding bearing. This allows the freewheel 32 itself and independently of the compensating device 50 to be centered and oriented.

[0046] The compensating device 50 includes a second compensating element 54, which is arranged axially between the one-way clutch side disk 42 or the second one-way clutch element 46 and the transmission element 34. The second compensating element 54 enables axial displacement between the transmission element 34 and the one-way clutch 32, and overall between the rotating component 12 and the housing component 30. Axial movements transmitted by the axially elastic transmission element 34 can thus be absorbed by the second compensating element 54. Axial centering within the one-way clutch 32 and the first one-way clutch element 44 is also achieved, for example, via the one-way clutch side disk 42.

[0047] exist Figure 2 FIG. 1 shows a partial cross section of a starter device 10 in another specific embodiment of the present invention. The structure is the same as FIG. 1 except for the following differences. Figure 1 The second compensating element 54 has a spur toothing 56 , via which an axial displacement between the one-way clutch side disk 42 and the transmission element 34 is possible.

[0048] Figure 3 A partial cross section of a starter device 10 in another specific embodiment of the present invention is shown. The construction is similar to that of the first embodiment except for the following differences. Figure 1 The first compensating element 52 has a toothing 58 , via which the carrier member 28 is received in a radially displaceable manner relative to the first one-way clutch element 44 .

[0049] exist Figure 4A detail of a cross section of a starter device 10 in another specific embodiment of the present invention is shown in . The first compensating element 52 is designed as a radially flexible connecting element 60 and is fixedly connected to the carrier component 28 and the first one-way clutch element 44 .

[0050] Figure 5 Shown along Figure 4 Detail of the side view along line AA in FIG. The connecting element 60 has a recess 62 , which serves to reduce the rigidity of the connecting element 60 with respect to radial forces. The recess provides radial movability of the connecting element 60 .

[0051] Description of Reference Numerals

[0052] [1] 10 Starter device 12 Rotating member 14 Housing 16 Starter element 18

[0053] Electric motor 20 Starter shaft 22 Gear 24 Tooth 26 Tooth member 28 Load-bearing member

[0054] 30 housing member 32 one-way clutch 34 transmission element 36 threaded connector 38 thread

[0055] Connecting member 40 Clamping body 42 One-way clutch side plate 44 First one-way clutch element 46

[0056] Second one-way clutch element 48 Support element 50 Compensation device 52 First compensation element

[0057] 54 second compensation element 56 spur gear portion 58 tooth portion 60 connecting element 62 recess A

[0058] Rotation axis.

Claims

1. A starter device (10) for starting an internal combustion engine, comprising: a starter element (16) for introducing a torque into a rotating component (12) of the internal combustion engine that is rotatable about an axis of rotation (A) for a starting process of the internal combustion engine; a housing component (30) associated with a fixed housing (14); a tooth component (26) rotatable relative to the housing component (30) and connected to the starter element (16) via a torque-transmitting tooth component (24); a supporting component (28) connected to the tooth component (26) in a rotationally fixed manner and accommodating the tooth component; a one-way clutch (32) that causes a torque transmission from the starter element (16) to the rotating component (12) and prohibits a torque transmission in the opposite direction, and comprising a first one-way clutch element (44) and a second one-way clutch element (46) coupled to the first one-way clutch element via at least one clamping body (40), characterized in that A compensation device (50) is provided between the bearing member (28) and the rotating member (12) for providing radial movability between the housing member (30) and the rotating member (12); the compensation device (50) is provided between the housing member (30) and the bearing member (28).

2. The starter device (10) according to claim 1, characterized in that The compensating device (50) has a toothing (58) that allows the radial movability.

3. The starter device (10) according to claim 1, characterized in that The compensation device (50) has a radially flexible connecting element (60).

4. The starter device (10) according to any one of the preceding claims, characterized in that The compensation device (50) additionally provides axial movability between the housing member (30) and the rotating member (12).

5. The starter device (10) according to any one of the preceding claims 1 to 3, characterized in that The compensating device (50) connects the one-way clutch (32) to the toothed component (26) in a radially movably manner.

6. The starter device (10) according to any one of the preceding claims 1 to 3, characterized in that The compensating device (50) is disposed between the toothed member (26) and the first one-way clutch element (44).

7. The starter device (10) according to any one of the preceding claims 1 to 3, characterized in that The compensation device (50) is arranged between the carrier member (28) and the first one-way clutch element (44).

8. The starter device (10) according to any one of the preceding claims 1 to 3, characterized in that The compensation device (50) is arranged between the second one-way clutch element (46) and the rotating member (12).

9. The starter device (10) according to any one of the preceding claims 1 to 3, characterized in that The first one-way clutch element (44) is designed as a one-way clutch inner ring and the second one-way clutch element (46) is designed as a one-way clutch outer ring.

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