Spring devices, methods for manufacturing spring rings, centrifugal pendulum devices, and torque transmission devices.

Abstract

The present invention relates to a spring device for a centrifugal pendulum device (300) having a pendulum block support (302) rotatable about a rotation axis, a pendulum block (304) movably disposed on the pendulum block support (302) along a pendulum rail, and a spring device for loading the pendulum block (304) with a radially outward spring force, wherein the spring device has at least one closed spring ring (314) with a plurality of spring ring segments, and the spring ring segments have different prestresses; the invention also relates to a method for manufacturing the spring ring (314) of such a spring device; a spring device for a centrifugal pendulum device (300) having a plurality of axially arranged side by side spring arcuate segments; a centrifugal pendulum device (300) having such a spring device; and a torque transmission device having such a spring device and / or such a centrifugal pendulum device (300).

Description

Technical Field

[0001] This invention relates to a spring device for a centrifugal pendulum apparatus, the centrifugal pendulum apparatus having a pendulum block support rotatable about a rotation axis, a pendulum block movably disposed on the pendulum block support along a pendulum rail, and a spring device for loading the pendulum block with a radially outward spring force. Furthermore, this invention relates to a method for manufacturing a spring ring for the spring device. Additionally, this invention relates to a centrifugal pendulum apparatus, particularly for a torque transmission device, the centrifugal pendulum apparatus having a pendulum block support rotatable about a rotation axis and a pendulum block movably disposed on the pendulum block support along a pendulum rail. Furthermore, this invention relates to a torque transmission device, particularly for a powertrain of an internal combustion engine-driven motor vehicle. Background Technology

[0002] A centrifugal pendulum for attenuating rotational asymmetry introduced via the drive shaft of a motor vehicle engine is known from German patent application number 102020107606.1. The centrifugal pendulum comprises: a load-bearing flange rotatable about a rotational axis and capable of being coupled to the drive shaft; at least one pendulum block oscillatingly guided relative to the load-bearing flange to generate a restoring torque against rotational asymmetry; at least one coupling element, particularly configured as a roller, for guiding the pendulum block on the load-bearing flange, wherein the coupling element is guided on a swashplate of the pendulum block and a roller on the load-bearing flange; and a spring device for providing a radially outwardly directed spring force acting on the pendulum block to press the coupling element against the swashplate and roller. Further technical features of the invention are described in German patent application number 102020107606.1, features which, without conflict with the present invention, are also teachings of the invention and are included in the disclosure of the present invention.

[0003] A centrifugal pendulum for reducing torsional vibration is known from German patent application number 102020120629.1. The centrifugal pendulum comprises: a pendulum block carrier rotatable about a rotation axis; at least two pendulum blocks, each supported on at least one rolling element and spaced apart on a circumferential side, respectively, along corresponding pendulum rails on the pendulum block carrier; and coupling elements for coupling the pendulum blocks, wherein the coupling elements are radially disposed between the rotation axis and the pendulum blocks and are closed on the circumferential side via at least one connecting element separately formed from the coupling elements. Further technical features of the invention are described in German patent application number 102020120629.1, the features of which are teachings of the invention and included in the disclosure thereof without conflict with the present invention. Summary of the Invention

[0004] The objective of this invention is to improve the spring device mentioned earlier in terms of structure and / or function. Furthermore, the objective of this invention is to improve the method mentioned earlier. Furthermore, the objective of this invention is to improve the centrifugal pendulum device mentioned earlier in terms of structure and / or function. Furthermore, the objective of this invention is to improve the torque transmission device mentioned earlier in terms of structure and / or function.

[0005] The objective is achieved by means of a spring device according to the invention, a method according to the invention, a centrifugal pendulum device according to the invention, and a torque transmission device according to the invention. Advantageous embodiments and / or improvements are described in this invention.

[0006] Unless otherwise stated or derived from the context, the terms "axial," "radial," and "circumferential" refer to the direction of extension of the axis of rotation. "Axial" corresponds to the direction of extension of the axis of rotation. "Radial" is the direction perpendicular to and intersecting the axis of rotation. "Circumferential" corresponds to the direction of an arc around the axis of rotation.

[0007] A spring device can be used to load the pendulum block in the direction of the working position. The spring device can be used to load the pendulum block such that the pendulum block and its at least one associated rolling element are prestressed relative to the pendulum block support in a force-fit and / or form-fit manner, respectively, to avoid form-fit loss between the pendulum block and its at least one associated rolling element, and between the at least one associated rolling element and the pendulum block support, with reduced or absent centrifugal force. The spring device can function separately between the pendulum block and the pendulum block support. The spring device can be used to couple the pendulum blocks together. The spring device can function separately between at least two pendulum blocks. The spring device can function between two pendulum blocks, between multiple pendulum blocks, or between all pendulum blocks. The spring device can function both between pendulum blocks and between one pendulum block and another pendulum block support. The spring device can be used to load the pendulum block in the radial, axial, and circumferential directions.

[0008] At least one spring ring can be closed. At least one spring ring can be manufactured seamlessly. At least one spring ring can have at least one joint. At least one spring ring can be made of metal wire. A spring ring can also be called a ring spring. Spring ring segments can be functionally separate and / or different from each other. Spring ring segments can be structurally one-piece and / or connected to each other, especially by material mating. The prestress of the spring ring segments can be introduced during the manufacture of at least one spring ring. The prestress of the spring ring segments can be the mechanical stress present in at least one spring ring without external load. The prestress can be used to represent a predetermined spring characteristic under load. The prestress can be used to compensate for localized stress differences caused by load. The prestress and stress can be tensile stress and / or compressive stress. At least one spring ring can have at least two spring ring segments, said at least two spring ring segments having different prestresses. At least one spring ring can have a first spring ring segment and a second spring ring segment, the first spring ring segment having a first prestress and the second spring ring segment having a second prestress. At least one spring ring can have multiple first spring ring segments and multiple second spring ring segments corresponding to the number of pendulum blocks. The first spring ring segments and the second spring ring segments can be arranged alternately.

[0009] The steps for manufacturing the spring ring can be performed sequentially in a given order. At least two steps can be performed directly and sequentially. At least one additional step can be performed before, after, and / or between two steps. The spring ring can be made of metal wire. The manufacture of the spring ring can include separation, shaping, and / or heat treatment. The open spring element manufactured in the first step can initially be at least almost stress-free. The open spring element manufactured in the first step can have a ring or arc shape. The open spring element manufactured in the first step can have a shape already similar to the spring ring. The ends of the open spring element manufactured in the first step can be spaced apart or overlapped. The open spring element manufactured in the first step can have multiple spring element segments. The spring element segments can be shaped differently. The spring element segments can each have an arc shape. The spring element segments can each have an arc shape with different radii. The open spring element can have multiple spring element segments corresponding to the number of spring ring segments. In the second step, the ends can be guided together by a spring element that pulls in with a decreasing radius or stretches the opening with an increasing radius. The ends can be connected with mating materials, especially by welding.

[0010] A spring device can have a single spring ring for a pendulum block or a pendulum block component. A spring device can also have multiple spring rings for a pendulum block or a pendulum block component.

[0011] A spring device can have multiple axially arranged side-by-side curved spring segments. These axially arranged curved spring segments can have the same radius. They can be arranged parallel to each other. They can be spaced apart or abutted against each other. These axially arranged curved spring segments can be collectively associated with a swing block. The axially arranged curved spring segments can be formed by means of axially arranged side-by-side spring rings. A spring device can have multiple axially arranged side-by-side spring rings, each spring ring having a curved spring segment. The axially arranged curved spring segments can be formed by means of at least one torsion spring. A spring device can have at least one torsion spring, which has axially arranged side-by-side curved spring segments.

[0012] At least one spring ring, multiple spring rings, or at least one torsion spring can be manufactured in one piece. At least one spring ring, multiple spring rings, or at least one torsion spring can be composed of multiple arcuate segments. At least one spring ring, multiple spring rings, or at least one torsion spring can have multiple arcuate segments and segment connecting portions. The arcuate segments and / or segment connecting portions can be associated with one or more pendulum blocks respectively.

[0013] The centrifugal pendulum device can be used in the torque transmission device of the powertrain, especially in internal combustion engine-driven motor vehicles. The centrifugal pendulum device can be used to eliminate torsional vibrations.

[0014] The swing block support can have an annular disc or flange shape. The swing block support can have a single swing block support component. The swing block support can be used to axially arrange swing block components on both sides. The swing block support can have a first annular disc or flange-shaped swing block support component and a second annular disc or flange-shaped swing block support component. Each swing block support component can have a connecting section and a receiving section. The connecting section can be located radially inside and / or outside the receiving section. The first and second swing block support components can be securely connected to each other, particularly riveted, on the connecting section. The receiving sections of the first and second swing block support components can be axially spaced apart from each other and define the receiving space for at least one swing block. The swing block support can have at least one recess for a rolling element. At least one recess can be used to define a swing rail. At least one recess can have a kidney-shaped shape. The swing block support can be securely connected to a torque transmission device. The flange-shaped component of the torque transmission device can be used as a swing block support.

[0015] At least one swing block can be eccentrically positioned relative to the axis of rotation. At least one swing block can have an arcuate shape. At least one swing block can have a single swing block component. At least one swing block can be axially positioned between a first swing block support component and a second swing block support component. At least one swing block can be positioned within the receiving space of the swing block support component. At least one swing block can be constructed in multiple components. At least one swing block can have a first swing block component and a second swing block component. The first and second swing block components can be positioned on opposite sides of the swing block support component. The first and / or second swing block components can be constructed in multiple components. At least one swing block, the first swing block component, and / or the second swing block component can have multiple layers axially adjacent to each other. At least one swing block, the first swing block component, and / or the second swing block component can have axially edge layers and at least one intermediate layer positioned between the edge layers. The layers can be securely connected to each other, particularly riveted. The first and second swing block components can be securely connected to each other, particularly riveted. The first and second swing block components can be constructed similarly and / or mirror-like. At least one pendulum block may have at least one recess for the rolling element. At least one recess may be used to define the pendulum track. At least one recess may have a kidney-shaped shape. The centrifugal pendulum device may have multiple, for example, four pendulum blocks. The pendulum blocks may be configured similarly.

[0016] At least one swing block can be connected to the swing block carrier in a multi-line, double-line, or single-line manner. At least one swing block can be mounted on the swing block carrier by means of at least one rolling element. At least one rolling element can be used to keep the first swing block component and the second swing block component spaced apart from each other. At least one rolling element can have a bolt-like shape. At least one rolling element can have a stepped bolt-like shape. At least one rolling element can have a central section and two end sections. The central section can have a larger diameter than the end sections. At least one rolling element can be guided in at least one recess of the swing block carrier and at least one recess of the at least one swing block.

[0017] At least one pendulum block can move to a working position under the action of centrifugal force. At least one pendulum block can move radially outward to a working position under the action of centrifugal force. In the working position, at least one pendulum block can move under the action of torsional vibration. In the working position, at least one pendulum block can be moved to eliminate torsional vibration. In the working position, at least one pendulum block can move between two end positions from the center position. In the working position, at least one pendulum block can move in an oscillating manner.

[0018] A first connecting section can be disposed radially inward on the pendulum block. At least one pendulum block can have a connecting element connected to the pendulum block. At least one connecting element can have a first connecting section. At least one pendulum block can directly have a first connecting section. A spring ring, multiple spring rings, or at least one torsion spring can be disposed radially inward on the pendulum block. Each of the first connecting section and the second connecting section can form an effective connection in the radial, axial, and circumferential directions. The connection can function between the pendulum block and at least one spring ring. The connection between the first connecting section and the second connecting section can be used to transmit the spring force and / or dynamic force and / or motion of at least one spring ring, multiple spring rings, or at least one torsion spring during the operation of the centrifugal pendulum device.

[0019] A free angle or freedom of movement can exist between the first connecting section and the second connecting section, respectively. A predetermined relative movement can be achieved between the first connecting section and the second connecting section, respectively. This relative movement can be achieved substantially along the circumferential direction. The relative movement can also be achieved to a smaller extent along the radial and / or axial directions. The connection can have varying stiffness in the spring ring according to the deflection of the pendulum. At least one spring ring can have a contact section and a bending section. The contact section can be used to contact the pendulum and can move circumferentially on at least one spring ring according to the deflection of the pendulum. The bending sections can be spaced apart from the pendulum and / or disposed between the contact sections, and each has a length that changes according to the movement of the contact section.

[0020] Part T is a natural number and is derived from T = P / V, where P is the number of pendulum blocks, and V is the number of connections of at least one spring ring, multiple spring rings, or at least one torsion spring to the pendulum blocks. At least one spring ring, multiple spring rings, or at least one torsion spring can be connected to every other pendulum block. The spring assembly can have two spring rings or torsion springs, or two sets of spring rings or torsion springs. At least one spring ring, multiple spring rings, or at least one torsion spring can be connected to every two pendulum blocks. The spring assembly can have three spring rings or torsion springs, or three sets of spring rings or torsion springs. An arc-shaped helical spring can have a helical axis extending along the circumferential direction.

[0021] The torque transmission device can be used in the powertrain of a motor vehicle. The powertrain can have an internal combustion engine. The internal combustion engine can have a crankshaft. The powertrain can have a single-mass flywheel, a torsional vibration damper, especially a dual-mass flywheel, a friction clutch device, a torque converter, a transmission, at least one drivable wheel, and / or an auxiliary unit drive. The torque transmission device can be a single-mass flywheel, a torsional vibration damper, especially a dual-mass flywheel, a friction clutch device, a torque converter, an auxiliary unit drive, or the crankshaft of an internal combustion engine.

[0022] Therefore, in summary and in other words, the present invention also results in a reduction of stress in the centrifugal pendulum-ring spring. Different solutions according to the invention can be used individually or in combination to specifically reduce the stress in the ring spring.

[0023] This invention improves driving comfort. It reduces noise generation, especially during engine start-up and shutdown. It reduces perceptible noise within the vehicle interior. It prevents damage to the centrifugal pendulum mechanism. It reduces localized stress, wear, and / or structural space requirements. It increases service life. It reduces expenses such as maintenance, repair, and / or operating costs. It resolves the conflicting objectives of low component stress to ensure fatigue strength, low deformation of the annular spring during centrifugal pendulum operation, and providing sufficiently high support force. Attached Figure Description

[0024] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which are illustrated schematically and exemplary:

[0025] Figure 1 The manufacture of a spring ring for a spring device consisting of an open spring element is shown;

[0026] Figure 2 Two spring rings are shown, each having two arc-shaped sections and a connection between the two sections;

[0027] Figure 3 A centrifugal pendulum device with a free-flowing spring mechanism is shown in partial view;

[0028] Figure 4 Two spring rings are shown, each connected to a portion of the pendulum block; and

[0029] Figure 5 The deflection-related connection between the pendulum block and the spring ring is shown. Detailed Implementation

[0030] Figure 1The manufacture of the spring ring 100 of the centrifugal pendulum device (not shown in detail here) is illustrated. The spring ring 100, as a closed element, exhibits locally varying bending stresses when viewed around its circumference. These bending stresses can be classified as tensile or compressive stresses to varying degrees depending on their location. Therefore, the highest component load does not occur continuously across the entire circumference but is distributed across multiple locations on the circumference. The maximum value of the localized stress is reduced through stress superposition by the targeted introduction of separately reacting compressive or tensile prestresses, thereby extending the component's service life. These additionally introduced stresses are achieved by the spring ring 100 being under bending stress even before being inserted into the centrifugal pendulum device. This stress is achieved by the spring ring 100 initially being manufactured as an open spring element 102 in a nearly relaxed state, and then closed by bending it together and connecting the ends 104, 106 before being inserted into the centrifugal pendulum device. Alternatively, the open spring element can be manufactured first, with the ends overlapping. In this case, the spring element is opened accordingly to create a closed spring ring. The spring ring 100 has a second connecting section, such as 108, which together with the first connecting section disposed on the pendulum block of the centrifugal pendulum device forms an effective connection in the radial, axial and / or circumferential directions.

[0031] The stress in the spring ring can also be reduced by designing the shape of the wire ring to be softer. Nevertheless, to achieve sufficiently high support force, multiple spring rings can support the pendulum block on one or both sides of the pendulum block support in the centrifugal pendulum device. Similarly, a one-piece spring ring can be bent circumferentially as a torsion spring and can contain multiple coils. Structural measures prevent the torsion spring from contracting along the circumferential direction.

[0032] Figure 2 A spring ring 200 with two arcuate segments 202, 204 and two segment connecting portions 206, 208 is shown, as well as a spring ring 210 with two arcuate segments 212, 214 and two segment connecting portions 216, 218. The segment connecting portions 206, 208, 216, 218 also connect the two spring rings 200 and 210 to each other. The spring rings 200 and 210 are respectively used to load multiple pendulum blocks with a radially outward spring force to obtain sufficient stiffness for high support force. The curved segments 202, 204, 212, 214 and the segment connecting portions 206, 208, 216, 218 of the spring rings 200 and 210 are symmetrically staggered from each other in the circumferential direction.

[0033] Figure 3A partial view shows a centrifugal pendulum device 300, comprising: a pendulum block support 302; four multi-piece pendulum blocks, such as 304; and a spring device 306. The pendulum block support 302 is rotatable about a rotation axis. The pendulum blocks 304 are movably disposed on the pendulum block support 302 by means of rolling elements, such as 308. During operation of the centrifugal pendulum device 300, the pendulum block support 302 rotates and the pendulum blocks 304 move radially outward to a working position under centrifugal force. In the working position, the pendulum blocks 304 are able to oscillate between two end positions along a pendulum track from a central position under torsional vibration, thereby eliminating torsional vibration.

[0034] With the aid of spring device 306, the swing block 304 is coupled to the other swing blocks and loaded with a radially outward spring force, so that the swing block 304 and the rolling element 308 are prestressed relative to the swing block support 302, so as to avoid loss of form fit between the swing block 304, the rolling element 308 and the swing block support 302 when the centrifugal force is reduced or absent.

[0035] The spring device 306 includes: a connecting element, such as 310, disposed on the swing block component of the swing block 304; a first connecting section, such as 312; and a spring ring 314 having a second connecting section, such as 316. The second connecting section 316 is formed by means of a radially inwardly pointing arc-shaped portion 318 of the spring ring 314. The first connecting section 312 is formed by means of a correspondingly extending groove-shaped recess 320 in the connecting element 310. The spring ring 314 is fixed in the first connecting section 312 of the swing block 304 in the radial and axial directions with its second connecting section 316 and has freedom in the circumferential direction, so as to form a preset free angle and to realize a defined relative movement between the spring ring 314 and the swing block 304 in the circumferential direction. Therefore, the stress in the spring ring 314 can be limited and the deterioration of the swing block synchronization can be largely avoided. Further reference is made in particular to the following aspects. Figure 1 and 2 And related descriptions.

[0036] Figure 4 Two spring rings 400 and 402, respectively connected to portions of the pendulum blocks, are shown. By supporting the rings circumferentially, for example only at every other pendulum block, the bending length is increased, and the stress in the spring rings 400 and 402 is reduced. The increased spacing between the second connecting sections 404 and 406 or 408 and 410 of the spring rings 400 and 402 also reduces the negative impact of asynchronous pendulum block movement. Alternatively, the bending length can also be increased by configuring the spring rings 400 and 402 as arc-shaped compression springs (arc springs). Further details are provided in particular. Figures 1 to 3 And related descriptions.

[0037] Figure 5 The deflection-related connections 500 and 501 between the pendulum block 502 and the spring ring 504 are shown. The first connecting segment 506 of the pendulum block 502 and the second connecting segment 508 of the spring ring 504 are designed such that the spring ring 504 has varying stiffness as the pendulum block 502 deflects progressively. This adaptive stiffness is achieved through a design in which the contact segment between the spring ring 504 and the pendulum block 502 moves circumferentially as the spring ring 504 deforms. Therefore, the lengths of the corresponding bending segments 510, 512, 514, and 516 are altered, and stress is specifically reduced. Further details are provided in particular. Figures 1 to 4 And related descriptions.

[0038] The word "capable" specifically indicates an optional feature of the invention. Therefore, there are also improvements and embodiments of the invention that additionally or alternatively have one or more corresponding features.

[0039] When necessary, it is also possible to select an independent feature from the currently disclosed combination of features and use it in combination with other features to define the subject matter of the claim, in order to address the structural and / or functional relationships that may exist between features.

[0040] List of reference numerals

[0041] 100 Spring Ring

[0042] 102 Spring Components

[0043] 104 end

[0044] 106 end

[0045] 108 Second connecting section

[0046] 200 Spring Ring

[0047] 202 Arc-shaped section

[0048] 204 Arc-shaped section

[0049] Section 206 Connecting Section

[0050] Section 208 Connecting Section

[0051] 210 Spring Ring

[0052] 212 Arc-shaped section

[0053] 214 Arc-shaped section

[0054] Section 216 Connecting Section

[0055] Section 218 Connecting Section

[0056] 300 Centrifugal Pendulum Device

[0057] 302 sway block support

[0058] 304 Slab

[0059] 306 Spring Device

[0060] 308 Rolling element

[0061] 310 Connecting element

[0062] 312 First connecting section

[0063] 314 Spring Ring

[0064] 316 Second connecting section

[0065] 318 Molding Section

[0066] 320 recess

[0067] 400 Spring Ring

[0068] 402 Spring Ring

[0069] 404 Second connecting section

[0070] 406 Second connecting section

[0071] 408 Second connecting section

[0072] 410 Second connecting section

[0073] 500 Connecting Part

[0074] 501 Connecting Part

[0075] 502 slab

[0076] 504 Stainless Steel Spring Ring

[0077] 506 First connecting section

[0078] 508 First connecting section

[0079] 510 Bending section

[0080] 512 Bending section

[0081] 514 Bending section

[0082] 516 Bending section

Claims

1. A spring device for a centrifugal pendulum device (300), the centrifugal pendulum device (300) having a pendulum block support (302) rotatable about a rotation axis, pendulum blocks (304, 502) movably disposed along a pendulum rail on the pendulum block support (302), and a spring device for loading the pendulum blocks (304, 502) with a radially outward spring force, characterized in that, The spring device has at least one closed spring ring (100, 200, 210, 314, 400, 402, 504), the spring ring has multiple spring ring segments, and the spring ring segments have different prestresses.

2. A method for manufacturing a spring ring (100, 200, 210, 314, 400, 402, 504) for the spring device according to claim 1, characterized in that, In the first step, at least one open spring element (102) is manufactured, the spring element having a different shape from the spring rings (100, 200, 210, 314, 400, 402, 504) and two spaced-apart ends (104, 106). In the second step, the ends (104, 106) are guided together to generate locally different prestresses. In the third step, the guided ends (104, 106) are connected to each other to close the spring rings (100, 200, 210, 314, 400, 402, 504).

3. A centrifugal pendulum device (300), the centrifugal pendulum device (300) having a pendulum block support (302) rotatable about a rotation axis and a pendulum block (304) movably disposed on the pendulum block support (302) along a pendulum track, characterized in that, The centrifugal pendulum device (300) has a spring device according to claim 1, a first connecting section (312) associated with the pendulum block (304), and the at least one closed spring ring (314) has a second connecting section, and a predetermined relative movement, at least substantially circumferentially, can be realized between the first connecting section (312) and the second connecting sections (316, 404, 406, 408, 410).

4. A centrifugal pendulum device, the centrifugal pendulum device having a pendulum block support member rotatable about a rotation axis and a pendulum block (502) movably disposed on the pendulum block support member along a pendulum track, characterized in that, The centrifugal pendulum device has a spring device according to claim 1 and a connecting portion (500, 501) acting between the pendulum block (502) and the at least one closed spring ring (504), the connecting portion having a spring ring stiffness that varies according to the deflection of the pendulum block (502).

5. A centrifugal pendulum device, the centrifugal pendulum device having a pendulum block support member rotatable about a rotation axis and a pendulum block movably disposed on the pendulum block support member along a pendulum track, characterized in that, The centrifugal pendulum device has a spring device according to claim 1, and the at least one closed spring ring (400, 402) is connected to a portion of the pendulum block.

6. A torque transmission device, characterized in that, The torque transmission device has a spring device according to claim 1 and / or a centrifugal pendulum device (300) according to any one of claims 3 to 5.

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