Damper device, and power train having a damper device

Abstract

The invention relates to a power train (1) at least having a power input (2), a torsional vibration damper (11), a torque limiter (12), an axis of rotation (9) and a power output (4), wherein first torques (Md1) can be transmitted in the power train (1) via a first path (A), formed of the power input (2), the torsional vibration damper (11) and the torque limiter (12), from the power input (2) via the torsional vibration damper (11) and from the torsional vibration damper (11) via the torque limiter (12) to the power output (4). The invention further relates to a damper device (20) at least having a first component (3), a second component (5), at least one spring element (6) and at least one first limit stop (7) associated with the first component (3), and a second limit stop (8) associated with the second component (5), as well as an axis of rotation (9).

Description

[0001] Damper device and powertrain with damper device

[0002] Background of the invention

[0003] Various solutions for reducing noise caused by torsional vibrations and for protecting drivetrain assemblies or components from damage caused by impacts, such as dampers integrated into gears, are known from the prior art. Impacts are understood to refer in particular to torque surges. The transmissions of drive units with or without combustion engines can generate noise due to backlash caused by alternating torques. While it is possible to preload the gears in hybrid transmissions using an electric motor, this consumes energy and thus reduces the range. Furthermore, torsional vibrations in the drivetrain, which generate undesirable noise due to backlash, must be dampened. German patent DE 102021 006327A1 discloses a gear damper with a preloaded damping characteristic with a zero crossing.From DE 102017 103471 A1 emerges a drive train for a motor vehicle in which an additional mass is coupled to the drive train via a torque limiter.

[0004] Description of the invention

[0005] The object of the invention is to provide a further improved measure for vibration damping.

[0006] The problem is solved according to the subject matter of claim 1.

[0007] A power train is equipped with a damping device and a torque limiter, so that the damping device is protected from overload by peak torques.

[0008] The power train comprises at least one power input, one torsional vibration damper, one torque limiter, one axis of rotation, and one power output. The power input and power output are, for example, shafts or gears. Under normal operating conditions, the power train transmits initial torques corresponding to normal operating conditions. These torques are transmitted via a first (power) path formed by the power input, the torsional vibration damper, and the torque limiter, from the power input through the torsional vibration damper, and from the torsional vibration damper...

[0009] Transmittable via the torque limiter to the power output

[0010] A stop device consisting of at least two stops is arranged between the power input and the power output. The torsional vibration damper can be bypassed by means of the stop device in such a way that the secondary torques exceeding the maximum permissible operating torque in the power train can be transmitted to the power output via a second path formed by the power input, the stop device with its stops abutted against each other, and the torque limiter with the closed overrun clutch. The spring elements are free from the loads resulting from the secondary torques, as these are bypassed by means of the stop device.

[0011] The advantage of the invention lies in a space-saving arrangement that effectively dampens vibrations and is protected against damage due to overloads.

[0012] A space-saving solution is particularly advantageous when, as one embodiment of the invention provides, the damping device and the stop device are housed together in a single gear. The gear can be positioned at any point in a drive train. The torque limiter downstream of the damping device preferably comprises a slip clutch formed from mutually preloaded friction surfaces, which disengages when torque limits are exceeded.

[0013] Description of the drawings

[0014] The invention is explained in more detail below with reference to exemplary embodiments and drawings. The drawings show:

[0015] Figures 1 and 1a show an embodiment of a damper device 20 in a longitudinal section, and Figures 2-5 show schematic representations of an embodiment of a power train 1 or of the damper device 20.

[0016] Figure 1 - Component 3 has external teeth 14, for example, of a gear 3a, which can mesh with another gear in a gear stage (not shown). The second component 5 has internal teeth 15, for example, on a hub 5a of a shaft-hub connection between the hub 5a.

[0017] and features a wave that is not shown.

[0018] The spring elements 6 are arranged radially between the first component 3 and the second component 5 with respect to the axis of rotation 9. Furthermore, the damper device 20 is provided with stops 7 and 8 (Figure 1a) that are opposite each other in a gap in an initial state.

[0019] Figures 2, 4 and 5 - The power train 1 is equipped with a power input 2, a damping device 20 with a torsional vibration damper 11, a torque limiter 12, a rotary axis 9 and a power output 4. A stop device 13 formed from stops 7, 8 is arranged between the power input 2 and the power output 4.

[0020] Figure 3 - The damper device 20 comprises a first component 3, a second component 5, at least one spring element 6, at least one stop 8 associated with the first component 3, a stop 7 associated with the second component 5, a torque limiter 12, and a pivot axis 9. The first component 3 and the second component 5 are arranged concentrically to the axially extending pivot axis 9 and are rotatable about the pivot axis 9. An overload clutch 12a of the torque limiter 12 is arranged between the spring element 6 and the second component 5 and between the second stop 8 and the second component 5. The first component 3 and the second component 5 are rotatable relative to each other about the pivot axis 9 against the elastic resistance of the at least one spring element 6, limited to a maximum of 90 degrees until the opposingly rotated stops 7 and 8 meet.

[0021] Figure 4 - In the power train 1, in at least one operating state, first torques Md1 are transmitted via a first path A in the power flow from the power input 2 via the torsional vibration damper 11 and from the torsional vibration damper 11 via the torque limiter 12 to the power output 4. The first component 3 and the second component 5 are operatively connected to each other about the axis of rotation 9, transmitting torques Md1, and are supported against each other by the at least one spring element 6. The stops 7, 8 are positioned in directions of rotation about the axis of rotation 9 until a first limit is exceeded.

[0022] The limit of the torques Md1 to be transmitted is determined by the fact that the stops 7 and 8 are in contact with each other. The first limit is, for example, defined by the upper value of a working range of the spring elements 6 of the torsional vibration damper 11, within which torsional vibrations can be compensated by elastic deformations of the spring elements 6. Alternatively, the first limit is determined by a maximum displacement, i.e., by the maximum possible contactless pivoting of the stops 7 and 8 towards each other about the axis of rotation 9.

[0023] Figure 5 - The torsional vibration damper 11 can be bypassed by means of the stop device 13 such that, in the power train 1, second torques Md2 can be transmitted to the power output 4 via a second path B formed by the power input 2, the stop device 13, and the torque limiter 12. In this path, after exceeding the first limit, the second torques Md2 are greater than the first torques Md1. When the first limit for the first torques Md1 is exceeded, the stops 7 and 8 are struck against each other and transmit the torques Md2 up to the upper limit of a second limit for the torques Md2 to be transmitted.

[0024] The second limit value is determined by the properties of the weakest link of all components and assemblies of the power train 1, below which the components or assemblies are subject.

[0025] The components of power train 1 must function without damage, non-destructively, and / or without malfunction. The second torques are transmitted in path B via the connected stops 7 and 8 and via the torque limiter 12 to the power output (second path). The second limit can be exceeded by excessively high torques, e.g., during torsional surges. If the second limit is exceeded, the overrun clutch 12a of the torque limiter 12 engages and interrupts the transmission of torques until the first or second limit is no longer exceeded.

Claims

Patent claims 1. Power train (1) comprising at least a power input (2), a torsional vibration damper (11), a torque limiter (12), a rotary axis (9) and a power output (4), wherein in the power train (1) first torques (Md1) can be transmitted via a first path (A) formed from the power input (2) via the torsional vibration damper (11) and from the torsional vibration damper (11) via the torque limiter (12) to the power output (4), characterized in that a stop device (13) formed from at least two stops (7, 8) is arranged between the power input (2) and the power output (4), wherein the torsional vibration damper (11) can be bypassed by means of the stop device (13) such that in the power train (1) second torques (Md2) can be transmitted via a first path (A) formed from the power input (2), the torsional vibration damper (11) and the torque limiter (12) to the power output (4), characterized in that a stop device (13) formed from at least two stops (7, 8) is arranged between the power input (2) and the power output (4), wherein the torsional vibration damper (11) can be bypassed by means of the stop device (13) such that in the power train (1) second torques (Md2) can be transmitted via a path formed from the power input (2), the stop device (13)are transferable to the power output (4) via the second path (B) formed by the torque limiter (12).

2. Power train (1 ) with a rotational axis (9) about which the power input (2), the torsional vibration damper (11), the stop device (13) and the torque limiter (12) are rotatable, wherein the stop device (13) has at least two stops (7, 8) that can pivot relative to each other in directions of rotation about the rotational axis (9).

3. Damper device (20) comprising at least a first component (3), a second component (5), at least one spring element (6) and at least one first stop (7) associated with the first component (3) and a second stop (8) associated with the second component (5), and a pivot axis (9) wherein: - the first component (3) and the second component (5) are arranged concentrically to the axially extending axis of rotation (9) and are rotatable about the axis of rotation (9), - the first component (3) and the second component (5) are via at least one spring element (6) connected to each other supporting around the axis of rotation (9) and transmitting torques to each other, - the stops (7, 8) are opposite each other in directions of rotation around the axis of rotation (9) - the first component (3) and the second component (5) are rotatable against each other about the axis of rotation (9) against the elastic resistance of the at least one spring element (6) at most until the stops (7, 8) rotated against each other meet, limited to characterized in that an overload coupling (12a) of a torque limiter (20) is arranged between the spring element (6) and the second component (5) and / or between the second stop (8) and the second component (5).

4. Damper device (20) according to claim 3, characterized in that the overrun clutch (12a) is a slip clutch designed as a friction clutch.

5. Damper device (20) according to claim 3 or 4, characterized in that at least one of the components (3, 4) has a toothing (14, 15), either an external toothing (14) and / or an internal toothing (15).

6. Damper device (20) according to claim 5, characterized in that, with reference to the axis of rotation (9), the at least one spring element (6) is arranged radially between the first component (3) and the second component (5), wherein radially transversely is perpendicular to the axially oriented axis of rotation (9).

7. Damper device (20) according to any one of the preceding claims 3, 4, 5 or 6, characterized in that the at least one spring element (6) is arranged either radially in the first component (3) or in the second component (5) and / or on the first component (3) or second component (5) and / or radially between the first component (3) and the second component (5) with respect to the axis of rotation (9).

8. Damper device (20) according to any one of the preceding claims 3, 4, 5 or 6, characterized in that the at least one spring element (6) is arranged either radially in the first component (3) or in the second component (5) and / or on the first component (3) or second component (5) and / or radially between the first component (3) and the second component (5) with respect to the axis of rotation (9). Claims 3 to 7, characterized in that the first Component (3) is a gear (3a) of a power train (1) designed as at least one gear stage and the other component (5) is a hub (5a) of the first component (3), wherein the hub (5a) has an internal toothing (5b) or a shaft profile and is a hub connection for seating on a transmission shaft (16).

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