Torque transmission device, driven flange and installation method

Abstract

The invention relates to a torque transmission device (1) for transmitting a drive torque between a first coupling element (16) of the torque transmission device (1) and a second coupling element (17) of the torque transmission device (1) and a torsional vibration damper (4) functionally arranged between an input (2) and an output (3) of the torque transmission device (1). And the output part (3) is provided with a driven flange (10c). The output flange (10c) and a housing section (10c) of the housing (10) of the torsional vibration damper (4) are integrally formed as a one-piece material.

Description

Field of the Invention

[0001] The present invention relates to a torque transmission device according to the preamble of claim 1. Background Art

[0002] In the drive train of a motor vehicle, the task of a torque transmission device is to transmit the torque generated by a drive machine to a transmission with as little vibration as possible. The torsional vibration damper corresponding to the object of the present application is also known in the technical jargon as a "reverse damper", i.e., this type of damper with reverse function. Such a torque transmission device for a hybrid vehicle is known from DE 102017 127 525 A1. Another torque transmission device is known from DE 10 2019 110 130 A1. Summary of the Invention

[0003] The object of the present invention is to provide a torque transmission device that can be manufactured and installed simply and cost-effectively and has a torsional vibration damper.

[0004] This object is achieved by the subject matter of the claims herein.

[0005] According to the present invention, it is provided that the housing and the driven flange are integrally formed of the same material as one piece. The advantage of the present invention is that the welded connection known from the prior art is eliminated. Thereby, the housing can be manufactured in an energy-saving manner and inaccuracies caused by thermal deformation due to heat input can be avoided. This solution also no longer requires axial structural space for a riveted connection provided as an alternative to the welded connection.

[0006] A design of the present invention is that the housing has a housing section fixed to the cover, and the housing section is preferably formed of a steel plate, wherein the housing section and the driven flange are integrally formed of the same material as one piece to save materials and manufacturing costs.

[0007] "Integrally formed of the same material" means that the component is a single piece without a separating part and a joining part. The material structure, preferably a steel plate, is not broken at the transition of the component.

[0008] According to a design solution of the present invention, the sleeve is provided with an internal tooth portion or an insert provided with an internal tooth portion is placed in the sleeve, wherein the driven flange is associated with the second coupling element in a form-fitting manner and for transmitting a driving torque via the internal tooth portion. The tooth portion is preferably introduced into the sleeve or the insert by a forming process. The insert is advantageously also used, for example, to keep the wall thickness of the housing very small and advantageously affects its forming properties, quality and material distribution. In addition, on the insert, a form-fitting connection between the sleeve and the coupling element can be advantageously designed by a larger wall thickness and the teeth of the tooth portion to transmit a high torque. The insert is selectively held in the sleeve by a press fit, a form-fitting connection and by a material connection or by a combination of each of the measures. The form-fitting connection between the sleeve and the coupling element is preferably formed by a tooth portion, for example by a wedge-shaped tooth portion or a spline. The sleeve and the insert and their tooth portions are preferably manufactured by forming or cold forming. The second coupling element has an external tooth portion, wherein the internal tooth portion is effectively connected to the second coupling element via the external tooth portion.

[0009] According to a design solution of the present invention, the driven flange has a disk body including an inner cylindrical front extension. The front extension is preferably inserted axially during the cold forming of the sleeve and forms the sleeve, which extends from the root of the disk body of the unit composed of the housing section and the driven flange. When the driven flange is mounted on the torque transmission device, the front extension / sleeve enters the torque transmission device inward in the direction of the input flange on the primary side, so that axial structural space can be saved. Alternatively, the front extension points outward in the opposite axial direction.

[0010] According to another design solution of the present invention, the unit formed by the driven flange and the housing section is configured in an annular disk shape with at least one step portion, wherein the output portion is centered radially with respect to the input portion by means of the step portion of the housing section with respect to a member axially extending from the input flange. Since the components of the output portion have the maximum mass of the torque transmission device, the torque transmission device can be better centered at this time. The output portion is preferably connected to at least one member that is connected to the first coupling element and axially extends from the input flange, so that the axial distance between the input portion and the output portion is at least partially bridged by the axially extending member. Through one or more step portions, the housing section is axially inserted from the spring chamber in the axial direction towards the primary side (towards the direction of the input flange), so that the axial spacing therebetween is reduced and centering becomes simple, the structural space is reduced and the sealing of the spring chamber to the radial interior is simplified. A good basis for centering is obtained by the fact that the components of the output portion are connected to at least one member that is connected to the first coupling element and axially extends from the input flange. This member is preferably configured as an annular member and is a plate forming member, on which a shape matching the current structural space requirements can be advantageously realized. In addition, this member can be designed as a compensation disk, by means of which the radial and axial spacing with respect to the secondary assembly can be compensated.

[0011] The technical term for the input part of a torque transmission device or a torsional vibration damper is usually also referred to as the primary side, and the output part of the torque transmission device or the torsional vibration damper is called the secondary side. The input part functionally corresponds to and is effectively connected to the driving part, and the output part functionally corresponds to and is effectively connected to the driven part. The driving part consists of or has a driving machine. The driven part can have a clutch, a converter, and a transmission or other transmission elements and is ultimately assigned to the driven wheels. During normal vehicle operation, a driving torque generated by the driving machine is applied to the primary side, that is, the input part is connected to the driving side. The secondary side is the driven side of the torque transmission device and has a transmission element, and the driving torque is conducted from the torque transmission device to the transmission element on the driven side via the transmission element. The input side faces the input part or the driving part. The output side faces the output part or the driven part.

[0012] "Functionally" means that components or members are effectively connected to each other via an effective connection part. The effective connection part is provided, for example, by a member, a structural element, or a component connected to one of the members and / or structural elements. The effective connection part is provided, for example, via a bolt connection, a spring device, or an overload clutch, a flange, or elements that engage with each other form-locked or force-locked, or as provided by the present invention by a one-piece member made of the same material.

[0013] The torsional vibration damper is mainly formed by an input flange, a spring device, and a part of the housing connected to the driven flange. The spring device is functionally arranged between the input part and the output part, that is, between the input flange and the housing, such that the spring device forms an effective connection for attenuating vibrations between the input part and the output part. Here, the input flange is supported on the spring device via flange wings, and the housing is supported on the spring device via a support structure for the springs of the spring device so as to be able to twist relative to each other around the rotational axis of the torque transmission device limitedly against the spring action / spring force of the spring device.

[0014] Other embodiments of the present invention are described below:

[0015] The spring device preferably consists of a plurality of springs or spring groups distributed around the rotational axis. The springs or spring groups are preferably implemented as cylindrical tension springs, arc-shaped tension springs, or inserted helical springs. The springs of the spring group are preferably concentrically inserted into each other. The spring chamber is encapsulated by an annular molding on the housing and / or the cover of the housing and is sealed radially inward in the direction of the rotational axis by one or more seals or friction linings. This design is particularly suitable for the case where the spring chamber is filled with grease. Preferably, a plurality of springs are arranged distributed on the circumference around the rotational axis in the housing. The flange wings of the input flange abut against one end of the spring. The spring is supported at the other end on a suitable support structure, preferably formed into the housing. In addition, the spring can also be guided by a sliding shell made of plastic.

[0016] Here, the input part consists of a component or an assembly. The input part is assigned to the primary side and has, for example, an input flange as a single part or a pulse sensor fixed to the input flange with an input flange and a sensing mechanism as an assembly. Alternatively, a centrifugal pendulum device can also be constructed on the assembly. The input part is functionally connected to the first coupling element on the drive side. The coupling element is, for example, a screw, a flat plate, or a flywheel of an internal combustion engine.

[0017] The output part consists of a component or an assembly. Here, the output part is preferably formed by a housing including a cover and a spring chamber as an assembly, and alternatively can also include other components and structural elements or can include other assemblies such as a centrifugal pendulum device. The output part includes a driven flange, and the driven flange is preferably connected in a form-fitting manner via a sleeve to a coupling element such as a coupling pin implemented as a transmission shaft, a pin of a transmission shaft, or other coupling elements of a subsequent drive train.

[0018] Radially, any radial plane that is axially extended and perpendicular to the axis of rotation of the torque transmission device, that is, an arbitrarily axially extended axis of rotation, is perpendicularly penetrated. The axis of rotation is considered to be axially in any number of axial planes intersecting at the axis of rotation and independent of its actual position in space. During driving operation, the torque transmission device rotates around the axis of rotation, and in addition, the input part and the output part swing relative to each other to attenuate vibrations.

[0019] In the prior art, it is known to assign the mass of the housing and the spring device to the primary side, that is, to fix it here and assign the flange with flange wings to the secondary side and effectively connect it to the driven flange. Different from the known standard configuration of such a torque transmission device or torsional vibration damper in the prior art, in the torque transmission device or torsional vibration damper according to the present invention, the flange is assigned to the primary side and the housing is located in the secondary section. Therefore, the flange that previously interacted with the spring device and was arranged in the secondary section of the damper is now connected to the driven part, such as the crankshaft of an internal combustion engine or an electric motor, etc. This also causes the spring device that bears the mass of the housing and the function of the torsional vibration damper to no longer be connected to the primary side, but to be accommodated in the secondary section. Description of the Drawings

[0020] The following will Figure 1 describe the present invention in detail according to the specific embodiments shown.

[0021] Only Figure 1The torque transmission device 1 for transmitting a driving torque from the first coupling element 16 to the second coupling element 17 is shown in a longitudinal section along the axis of rotation 21. The torque transmission device 1 is provided with an input part 2 (in the primary section) assigned to the first coupling element 16 on the drive side, an output part 3 (in the secondary section) assigned to the second coupling element 17 on the driven side, and a torsional vibration damper 4. The input part 2 is formed by the input flange 8 of the torsional vibration damper 4. The torsional vibration damper 4 consists of the input flange 8, at least two spring devices 7, and at least the housing 10.

[0022] The input flange 8 in the primary section is fixed to the first coupling element 16 (not shown in detail) by means of a plurality of screws 29 distributed circumferentially around the axis of rotation 21. Since only one of the screws 29 can be seen in the schematic view. The first coupling element 16 is, for example, the coupling flange of an electric drive device or the flywheel of an internal combustion engine. The input flange 8 abuts against the respective spring device 7 with a flange wing 9 acting on the spring device 7 on the input side, that is, the input flange 8 has the same number of flange wings 9 as the number of spring devices 7. Since only one of the flange wings and only one spring device 7 are shown in the schematic view in Figure 1 The assembly 5 of the input part 2 in the primary section is formed by the input flange 8 and a sensing ring 33 of an induction mechanism connected to the input flange 8 (not shown further). The sensing ring 33 is connected to the input flange 8 by means of a riveted connection 34.

[0023] The component 6 of the output part 3 in the secondary section is provided with a housing 10, at least one spring chamber 11 for accommodating a spring device 7, and a driven flange 10c connected to the housing section 10a of the housing 10. The housing section 10a and the cover 13 form the housing 10. The cover 13 and the housing section 10a are materially connected to each other by a weld 30 at the radially outer edge of the housing section. The housing section 10a has an arcuate portion 10b with a grooved structure in its radially outer section. The axially opposite sections of the cover 13 of the housing 10 are arcuately curved in a similar groove shape at this location, so that an axially and radially restricted spring chamber 11 is formed by the cover 13 and the housing section 10 at this location. A spring device 7 is installed in the spring chamber 11, and in this case, the spring device is formed by a helical spring 32 and a sliding shell 31. The helical spring 32 is supported on the housing 10 at its end extending into the schematic diagram and not visible in the schematic diagram in a circumferential direction around the rotation axis 21 or tangentially to the circumferential direction. Based on the schematic diagram, only one spring device 7 of at least two spring devices of the torsional vibration damper 4 can be seen. The spring chamber 11 is protected and / or sealed radially inwardly by two rings 35 and 36. The ring 35, such as a friction ring, is axially clamped between the cover 13 and the input flange 8 under the action of a disc spring 37. The other ring 36 is axially supported between the input flange 8 and the housing section 10a. It can be arranged that a grease (not shown) is provided in the spring chamber 11.

[0024] The housing 10 or the housing section 10a and the driven flange 10c are integrally and materially identical to each other and are formed as a single piece. That is, there is no separating part or connecting part between the components commonly made from a slab. The housing 10 has a housing section 10a fixed to the housing 13, wherein the housing section 10a and the driven flange 10c are integrally and materially identical to each other and are formed as a single piece. The sleeve 15 is provided with an insert 27 placed in the sleeve 15, and the insert 27 includes an internal tooth portion 26, and the insert 27 is effectively connected to the second coupling element 17 via the internal tooth portion 26.

[0025] The second coupling element 17 has an external tooth portion 38, wherein the internal tooth portion 26 is effectively connected to the second coupling element 17 via the external tooth portion 38.

[0026] The driven flange 10c is effectively connected to the second coupling element 17 via the sleeve 15, and the second coupling element 17 is formed by a pin 28. The internal tooth portion 26 engages in the external tooth portion 38 of the pin 28 in a form-fitting manner to transmit the driving torque.

[0027] The driven flange 10c has a disc body 20 including an inner cylindrical front extension 22. The front extension 22 is concentrically arranged with respect to the rotation axis 21 of the torque transmission device 1 and extends axially in the direction of the input part 2 starting from a root 23 constructed on the disc body 20. The insert 27 is accommodated in the front extension 22.

[0028] In a method not shown, the component 6, the housing 10, and the spring device 7 of the output part 3 are slipped onto the input part 2 such that the component 6 is centered relative to the axis of rotation 21 in the radial direction on one or more members 25 during the slipping-on. The housing section 10a is provided in the shape of an annular disk with at least one ribbed step 24, and the output part 3 is centered radially relative to the input part 2 by means of the step on the members 25, which project axially in the direction from the input flange 8 towards the driven flange 10c.

[0029] The one or more members 25 are preferably annular disks 39 that are angled in configuration, which have a radially outer guide section 40 that is provided with a plurality of through-holes 41 distributed in the circumferential direction on the annular section that abuts against the input flange 8, and the screws of the input flange 8 fixed to the first coupling element 16 engage through the through-holes.

[0030] List of Reference Signs

[0031] 1 Torque transmission device

[0032] 2 Input part

[0033] 3 Output part

[0034] 4 Torsional vibration damper

[0035] 5 Component of the input part

[0036] 6 Component of the output part

[0037] 7 Spring device

[0038] 8 Input flange

[0039] 9 Flange wing of the input flange

[0040] 10 Housing

[0041] 10a Housing section

[0042] 10b Arching part

[0043] 10c Driven flange

[0044] 11 Spring chamber

[0045] 13 Cover of the housing

[0046] 15 Sleeve

[0047] 16 First coupling element

[0048] 17 Second coupling element

[0049] 20 Disk body

[0050] 21 Axis of rotation

[0051] 22 Front extension

[0052] 23 Root

[0053] 24 Step portion

[0054] 25 Component

[0055] 26 Internal tooth portion

[0056] 27 Insert

[0057] 28 Pin

[0058] 29 Screw

[0059] 30 Weld seam

[0060] 31 Slide housing

[0061] 32 Helical spring

[0062] 33 Sensing ring

[0063] 34 Riveted connection portion

[0064] 35 Ring

[0065] 36 Ring

[0066] 37 Disc spring

[0067] 38 External tooth portion

[0068] 39 Annular disc

[0069] 40 Guide section

[0070] 41 Through hole

Claims

1. A torque transmission device (1) for transmitting a driving torque between a first coupling element (16) of the torque transmission device (1) and a second coupling element (17) of the torque transmission device, the torque transmission device (1) being provided with an input portion (2) assigned to the first coupling element (16) on the drive side, and the torque transmission device (1) having an output portion (3) assigned to the second coupling element (17) on the driven side and a torsional vibration damper (4), wherein: the torsional vibration damper (4) is functionally arranged between the input part (2) and the output part (3) and has at least one spring device (7), wherein the input part (2) and the input part (3) can be pivoted relative to each other in a limited manner about the axis of rotation (21) of the torque transmission device (1) counter to the action of the spring device (7), the input part (2) has at least one input flange (8) which is operatively connected to the first coupling element (16) and which bears against the spring device (7) on the input side of the spring device (7), The output part (3) is provided with a housing (10), at least one spring chamber (11) for accommodating the spring device (7) and a driven flange (10c) connected to the housing (10), wherein the driven flange (10c) is operatively connected to the second coupling element (17), - the spring chamber (11) is at least partially surrounded by the housing (10) and a cover (13) fixed to the housing (10), the spring device (7) is accommodated in the spring chamber (11) and is supported on the driven side on the housing (10), It is characterized in that The housing (10) and the output flange (10c) are integrally formed from the same material as one piece.

2. The torque transmission device (1) according to claim 1, characterized in that The housing (10) comprises a housing section (10a) which is fixed to the cover (13), wherein the housing section (10a) and the output flange (10c) are integrally formed from the same material as one piece.

3. The torque transmission device (1) according to claim 1, characterized in that A driven flange (10c) operatively connected to the housing (10) is provided, wherein the driven flange (10c) is operatively connected to the second coupling element (17) via a sleeve (15).

4. The torque transmission device (1) according to claim 3, characterized in that The sleeve (15) is provided with an insert (27) inserted into the sleeve (15), the insert (27) comprising an internal toothing (26) and the insert (27) is operatively connected to the second coupling element (17) via the internal toothing (26).

5. The torque transmission device (1) according to claim 4, characterized in that The second coupling element (17) has an external toothing (38), wherein the internal toothing (26) is operatively connected to the second coupling element (17) via the external toothing (38).

6. The torque transmission device (1, 70) according to claim 4 or 5, characterized in that The driven flange (10c) has a disk body (20) with an inner cylindrical front extension (22), wherein the front extension (22) is arranged concentrically with respect to the rotation axis (21) of the torque transmission device (1) and extends axially in the direction of the input part (2) starting from a root (23) formed on the disk body (20), wherein the insert (27) is accommodated at least in the front extension (22).

7. The torque transmission device according to claim 1 or 2, characterized in that: The housing section (10a) is designed in the shape of an annular disk and has at least one step (24), wherein the output part (3) is centered radially relative to the input part (2) with a component (25) protruding axially from the input flange (8) by means of the step (24) of the housing section (10a).

8. The torque transmission device according to claim 7, characterized in that: The output (3) is centered on at least one component (25) which is connected to the first coupling element (16) and projects axially from the input flange (8).

9. The output flange (10c) of the torque transmission device (1) according to any one of the preceding claims, characterized in that The output flange (10c) is formed integrally with a housing section (10a) of a housing (10) of the torque transmission device (1) and is a cold-formed component made of sheet steel.

10. A method for mounting a torque transmission device (1) according to claim 7 on a first coupling element (16), wherein: The component (6) of the output part (3) is aligned with the component (5) of the input part (2) via the step (24), and the input part (2) is subsequently fixed to the first coupling element (16).

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