A torque transfer device for a powertrain of a motor vehicle

Abstract

The utility model relates to a torque transmission device (1) for a power assembly of a motor vehicle, having an input component (2), a driving disc (3) and a slip clutch (4) which is operatively interposed between the input component (2) and the driving disc (3), wherein the slip clutch (4) is designed as a friction unit (6) which is preloaded by a Belleville spring (5), and wherein the Belleville spring (5) is accommodated and supported at a plurality of axially folded retaining lugs (7) of the driving disc (3) or of a counter disc (8) which is fixedly connected to the driving disc (3), wherein the Belleville spring (5) is fixed to the retaining lugs (7) by means of a bayonet connection (9).

Description

Technical Field

[0001] This utility model relates to a torque transmission device for a powertrain of a motor vehicle such as a passenger car, truck, bus, or other commercial vehicle. The torque transmission device has an input component, a drive plate, and a slip clutch operatively inserted between the input component and the drive plate. The slip clutch is configured as a friction unit / friction clutch preloaded by a disc spring, and the disc spring is received and supported at multiple axially folded / shaped retaining plates of a mating disc of the drive plate or a mating disc fixedly connected to the drive plate. Thus, a torque transmission device is realized that is primarily configured as a slip clutch or has such a slip clutch. In principle, other vibration damping devices can be present in addition to the slip clutch to form a torsional vibration damping device. Background Technology

[0002] Such torque transmission devices are well known in the prior art. Such devices are disclosed, for example, by means of EP 2 511 554A1. Therefore, devices in which the formed tabs are used to accommodate disc springs are known. However, the sliding clutch shown is relatively costly to install. This is because it is common practice for the tabs used to accommodate the disc springs to be formed by axial exposure or deformation only when the disc springs are directly installed. Here, the tabs are deformed so that the disc springs are simultaneously preloaded and held in place. The difficulty here lies particularly in making all the tabs deform simultaneously and uniformly to the same (axial) dimension. Furthermore, the installation method requires a press / extrusion tool, which is associated with additional costs. Utility Model Content

[0003] Therefore, the purpose of this invention is to provide a torque transmission device with a slip clutch, which further simplifies the manufacturing and installation of the torque transmission device.

[0004] According to this invention, this is achieved by fixing / holding / fastening the disc spring to the retaining tab by means of a bayonet connector.

[0005] The bayonet-type connector first, that is, before installing the disc spring, precisely axially folds and reshapes all existing retaining tabs to the required dimensions. Then, in a single installation step, the disc spring is connected to the retaining tabs. This avoids the need for unnecessarily complex reshaping tools, which have been necessary until now for simultaneously installing the disc spring and reshaping the retaining tabs.

[0006] Further advantageous embodiments are claimed by the dependent claims and are set forth in detail below.

[0007] Therefore, it is advantageous to maintain the contact plate through the mating disc and axially penetrate the drive disc. This results in a slip clutch structure that is as compact as possible in the axial direction. The mating disc is also preferably directly realized as a modified metal plate (e.g., a steel plate).

[0008] Furthermore, it is advantageous that the retaining tabs used to achieve the bayonet connection are configured in a hook-like / hook-shaped manner (especially configured with hooks oriented in the circumferential direction). This allows for the establishment of a bayonet connection as simply as possible.

[0009] If the retaining tabs have protrusions in which disc springs are respectively provided / push-in / formally accommodated, extending in the circumferential direction and having an open receiving recess on one side, then no additional components are needed for the bayonet connection. On the other hand, the components for realizing the bayonet connection are kept as simple as possible.

[0010] Furthermore, it is advantageous that the protrusion (of the disc spring) is molded on the radially outer or radially inner side of the disc spring. This allows for the clever positioning of the protrusion to create a structure that is as compact as possible in the axial direction.

[0011] Furthermore, it is advantageous that the retaining force, which preloads the bayonet connector axially (i.e., especially in the position where the disc spring is torsionally secured to the retaining tab), is generated directly by the disc spring. This allows for a construction that remains as simple as possible.

[0012] Regarding the configuration of the receiving portion on the retaining tab side of the disc spring, it is also advantageous that each retaining tab has an axially extending connecting tab facing the first circumferential side (of the receiving cavity) and an axially raised portion facing the second circumferential side (of the receiving cavity) away from the first circumferential side, so that the disc spring is torsionally supported by the connecting tab and the raised portion. In this way, the receiving cavity has a retaining geometry that is both effective and easy to manufacture.

[0013] It is also advantageous for a compact and effective configuration of the torque transmission device used as a torsional vibration damping device to include a hub, two hub flanges, and multiple spring units. The hub is intended for connection with a shaft, and the hub flanges are used in coordination with the hub and configured such that, depending on the torsional direction of the hub relative to the hub flanges, either the first hub flange or the second hub flange is connected to the hub in a torque-transmitting manner. The spring units indirectly support the first and second hub flanges relative to each other in the circumferential direction, wherein the drive disc is torsionally supported relative to the hub.

[0014] If the drive plate is connected to the first and second hub flanges by means of a friction device, the construction of the torque transmission device is further simplified. Preferably, the drive plate is connected to the first hub flange by means of a separate (first) friction device and to the second hub flange by means of a further (second) friction device. Attached Figure Description

[0015] The present invention will now be described in detail below with reference to the accompanying drawings.

[0016] The attached diagram shows:

[0017] Figure 1 The diagram shows a longitudinal sectional view of a torque transmission device according to a preferred embodiment of the present invention, wherein the sliding clutch constructed according to the present invention is clearly visible in the radially outer region.

[0018] Figure 2 Showing according to Figure 1 The image shows a front view of a torque transmission device, illustrating the multiple spring units inserted between one of the two hub flanges and the intermediate flange.

[0019] Figure 3 Showing according to Figure 1 A three-dimensional detailed view of the torque transmission device cut along the longitudinal direction in the area of ​​the slipper clutch.

[0020] Figure 4 A top view of the hook-shaped retaining plate of the slipper clutch is shown radially from the outside to illustrate the accommodation of the disc spring protrusion in the retaining plate's receiving recess.

[0021] Figure 5 Shown in Figures 1 to 4 The front view of the disc spring used shows multiple protrusions distributed in the circumferential direction.

[0022] Figure 6 Shown in Figure 1 A perspective view of the mating disc used, wherein a retaining tab is formed at the mating disc, and

[0023] Figure 7 The radial outer view of the retaining tab is shown. Detailed Implementation

[0024] The accompanying drawings are merely illustrative and intended only for understanding the present invention. Identical elements are labeled with the same reference numerals.

[0025] In the following text, by means of Figures 1 to 7 A detailed description of a torque transmission device 1 according to a preferred embodiment of the present invention is provided. Figure 1 and Figure 2 The torque transmission device 1, as can be seen as a whole, is rotatably supported around a central axis of rotation 23 during operation. The axis of rotation is directly pre-defined with specific directional specifications: axial, radial, and circumferential. Therefore, the axial direction should be understood as the direction along the axis of rotation 23, the radial direction should be understood as the direction perpendicular to the axis of rotation 23, and the circumferential direction should be understood as the direction along a circumferential line extending concentrically around the axis of rotation 23.

[0026] The torque transmission device 1 is used in the powertrain of a motor vehicle in a conventional manner during operation. The torque transmission device 1 has an input component 2 on the input side. The input component 2 is also alternatively referred to as / constructed as a friction disc. The input component 2 is formed from a metal plate (such as steel plate). The input component 2 is coupled via a slip clutch 4 constructed according to the present invention to two disc components in the form of a drive disc 3 and a mating disc 8 fastened thereon. As in Figure 2 As can be clearly seen, the input component 2 is axially clamped between the (first) disk region 24 of the carrying disk 3 and the (second) disk region 25 of the mating disk 8. Friction elements, such as friction pads 26a and 26b, are axially inserted between the corresponding disk regions 24 and 25 and the input component 2.

[0027] Disc spring 5 is used to axially press disc regions 24, 25 / friction linings 26a, 26b onto input component 2. Therefore, slip clutch 4 is implemented in a conventional manner as friction unit 6 / friction clutch, which temporarily disengages when a specific torque pulse is exceeded, allowing relative torsion between input component 2 on one hand and the composite formed by drive disc 3 and mating disc 8 on the other. As soon as the impact energy introduced by the torque pulse decreases, slip clutch 4 automatically re-engages, and torsionally connects drive disc 3 and mating disc 8 to input component 2.

[0028] In addition, combined Figures 3 to 7 It can be seen that the disc spring 5 is fixed to the two disc components—the carrying disc 3 and the mating disc 8—according to this invention. According to this invention, the disc spring 5 is thus fastened to the mating disc 8 by a bayonet-type connector 9. The mating disc 8 houses the disc spring 5 in a retaining tab 7 that is axially folded / shaped about the second disc region 25. As in Figure 6 As can be seen particularly clearly, there are multiple, in this case twelve, retaining tabs 7 evenly distributed in the circumferential direction at the mating disc 8 in the manner described.

[0029] Each retaining tab 7 is hook-shaped, wherein the formed hook is oriented in the circumferential direction. Therefore, each retaining tab 7 has a receiving recess 10 that is open on one side when viewed in the circumferential direction, the receiving recess together defining a hook shape. Figure 7 Therefore, the receiving cavity 10 extends into the retaining tab 7 from the circumferential side in the circumferential direction, essentially as an elongated hole. The receiving cavity 10 penetrates the retaining tab 7 radially. The receiving cavity 10 is preferably manufactured by means of a stamping method.

[0030] Therefore, the receiving cavity 10 constitutes a receiving portion for the protrusion 11 of the disc spring 5, which is described in detail below. The receiving cavity 10 is limited toward the first circumferential side 14a by the connecting piece 15 (which holds the connecting piece 7). The connecting piece 15 is directly used to support the protrusion 11 of the disc spring 5 toward the first circumferential side 14a in the circumferential direction. The receiving cavity 10 is open toward the second circumferential side 14b opposite to the first circumferential side 14a and is equipped with an axial bulge 16 / protrusion / lip. The bulge 16 is used to support the protrusion 11 of the disc spring 5 toward the second circumferential side 14b in the circumferential direction. Therefore, the corresponding protrusion 11 of the disc spring 5 is fixed / supported in the circumferential direction between the bulge 16 and the connecting piece 15.

[0031] exist Figures 3 to 5 The configuration of the protrusion 11 at the disc spring 5 and its accommodation in the receiving cavity 10 can be seen particularly clearly. Figure 5 The protrusion 11 is formed / placed on the radially inner side 13 of the disc spring 5. In this embodiment, the radially outer side 12 of the disc spring 5 does not have a protrusion / projection, thus achieving a circular shape. However, in principle, it is also feasible in other embodiments to place the protrusion 11 on the radially outer side 12 instead.

[0032] In Overview Figure 3 and Figure 4 In this context, it is clear that, in order to secure the disc spring 5 to the mating disc 8, i.e., to achieve the bayonet-type connector 9, the protrusion 11 is first axially pressed against the axial side of the carrying disc 3 / first disc region 24 away from the second disc region 25 in the circumferential direction, offset from the retaining tab 7. Here, the disc spring 5 is axially compressed until the protrusion 11 is positioned at the same height / aligned circumferentially with the receiving recess 10 of the retaining tab 7 in the axial direction. Then, the disc spring 5 is twisted relative to the mating disc 8 by pushing the protrusion 11 into the receiving recess 10 in the circumferential direction. As soon as the corresponding protrusion 11 abuts against the connecting tab 15 towards the first circumferential side 14a, the axial preload introduced onto the disc spring 5 is released again, and the disc spring 5 abuts against the support surface 27 of the mating disc 8 with its protrusion 11, which is axially facing the second disc region 25. Figure 4 As can be seen, the protrusion 11 therefore axially abuts against the retaining piece 7 between the connecting piece 15 and the raised part 16 to fix the bayonet connector 9.

[0033] Referring to another configuration of the torque transmission device 1, it can be seen that the torque transmission device is configured as a torsional vibration damping device. The torque transmission device 1 also has a hub 17, centrally located and used for further connection to another shaft of the powertrain, such as the transmission input shaft. Two hub flanges 18 and 19 are coupled to the hub 17. The hub flanges 18 and 19 are accommodated in a manner that allows for relative torsional rotation relative to the hub 17 within a limited range of rotation angles. The hub flanges 18 and 19 are used in coordination with the hub 17 such that, depending on the rotation direction of the hub 17, either the first hub flange 18 or the second hub flange 19 is connected to the hub 17 in a torque-transmitting manner. When the hub 17 rotates in a first rotation direction, the hub 17 rotatably drives the first hub flange 18; conversely, the hub can rotate relative to the first hub flange 18 (at least within a limited range of rotation angles) in a second rotation direction opposite to the first rotation direction. When hub 17 twists in the second rotational direction, hub 17 rotatably drives second hub flange 19; conversely, hub 17 is capable of twisting relative to second hub flange 19 (at least within a limited range of rotational angles) in the first rotational direction. Therefore, depending on the traction or inertial operation of the powertrain, hub 17 is capable of twisting relative to either first hub flange 18 or second hub flange 19.

[0034] Furthermore, it can be seen that multiple spring units 20a and 20b are inserted circumferentially between the corresponding hub flanges 18 and 19 and the intermediate flange 28. The first spring unit 20a (acting as a compression spring) is inserted circumferentially between the first hub flange 18 and the intermediate flange 28, and pre-tensions the first hub flange and the intermediate flange toward each other / away from each other in the circumferential direction. The second spring unit 20b (acting as a compression spring) is inserted circumferentially between the second hub flange 19 and the intermediate flange 28, and pre-tensions the second hub flange and the intermediate flange toward each other / away from each other in the circumferential direction.

[0035] The drive disc 3 preferably also has two partial discs 29a and 29b, which are respectively disposed on opposite axial sides of the hub flanges 18 and 19 and are rotatably supported on the hub 17. Here, a first friction device 21 is inserted between the drive disc 3 / first partial disc 29a and the first hub flange 18, and conversely, a second friction device 22 is inserted between the drive disc 3 / second partial disc 29b and the second hub flange 19. The corresponding friction devices 21 and 22 rotatably couple the corresponding partial discs 29a and 29b to the corresponding hub flanges 18 and 19.

[0036] In other words, according to this invention, the disc spring 5 is installed via a bayonet-type connector. For this purpose, the disc spring 5 has a tongue-shaped portion (protrusion 11) located inside or outside, which screws the disc spring 5 into the hook opening (accommodating recess 10) of the mating disc 8.

[0037] Therefore, a damper (torque transmission device 1) with an integrated torque limiter (slipper clutch 4; external in the example) is provided, wherein the disc spring 5 is tensioned and held via a bayonet joint / bayonet connector 9.

[0038] The disc spring 5 has multiple tongue-shaped portions distributed circumferentially, either at the inner diameter or the outer diameter.

[0039] The mating disc 8 has a number of tabs (holding tabs 7) distributed circumferentially corresponding to the number of tongues of the disc spring 5, and the tabs are provided with hook openings.

[0040] The mating disc 8 passes axially through the corresponding opening 30 of the drive disc 3.

[0041] During installation, first place the disc spring 5 onto the carrying plate 3, positioning the tongue between the tabs of the mating plate 8. Then, using a tool, axially preload and twist the disc spring 5 so that the tongue of the disc spring 5 screws into the hook / hook opening of the mating plate 8. The preload tool is then removed, and the disc spring 5 remains axially preloaded in the hook of the mating plate 8.

[0042] Preferably, the protrusion (raised portion 16) at the hook of the mating disc 8 serves as a protective device to prevent the disc spring 5 from unspinning out.

[0043] List of reference numerals

[0044] 1 Torque transmission equipment

[0045] 2 Input Components

[0046] 3. Portable disk

[0047] 4. Slippery clutch

[0048] 5 Disc Springs

[0049] 6 Friction Units

[0050] 7. Maintain splicing

[0051] 8 Pairing Plates

[0052] 9. Bayonet connectors

[0053] 10. Accommodation for empty spaces

[0054] 11. Protrusion

[0055] 12 Outer side

[0056] 13. Inner side

[0057] 14a First circumferential side

[0058] 14b Second circumferential side

[0059] 15 Connecting pieces

[0060] 16. Raised section

[0061] 17. Protrusion

[0062] 18 First hub flange

[0063] 19 Second hub flange

[0064] 20a First Spring Unit

[0065] 20b Second Spring Unit

[0066] 21 First Friction Device

[0067] 22 Second friction device

[0068] 23 Rotation axis

[0069] 24 First District

[0070] 25 Second District

[0071] 26a First friction lining

[0072] 26b Second friction lining

[0073] 27 Support surface

[0074] 28 Intermediate Flange

[0075] 29a Part 1

[0076] 29b Part Two

[0077] 30 Opening

Claims

1. A torque transmission device (1) for a powertrain of a motor vehicle, the torque transmission device comprising: an input component (2); a drive plate (3); and a slip clutch (4) operatively inserted between the input component (2) and the drive plate (3), wherein the slip clutch (4) is configured as a friction unit (6) preloaded by a disc spring (5), and wherein the disc spring (5) is received and supported at a plurality of axially folded retaining tabs (7) of a mating disc (8) fixedly connected to the drive plate (3), characterized in that, The disc spring (5) is fixed to the retaining piece (7) by means of a bayonet connector (9).

2. The torque transmission device (1) according to claim 1, characterized in that, The retaining tab (7) is formed by the mating disc (8) and axially penetrates the carrying disc (3).

3. The torque transmission device (1) according to claim 2, characterized in that, The retaining tab (7) is hook-shaped.

4. The torque transmission device (1) according to claim 1, characterized in that, The retaining tab (7) has a receiving cavity (10) that extends in the circumferential direction and is open on one side, in which the protrusion (11) of the disc spring (5) is provided respectively.

5. The torque transmission device (1) according to claim 4, characterized in that, The protrusion (11) is molded on the radially outer (12) or radially inner (13) side of the disc spring (5).

6. The torque transmission device (1) according to claim 1, characterized in that, The retaining force that axially pre-tightens the bayonet connector (9) is generated directly by the disc spring (5).

7. The torque transmission device (1) according to claim 1, characterized in that, Each retaining tab (7) has an axially extending connecting tab (15) facing the first circumferential side (14a) and an axially extending protrusion (16) facing the second circumferential side (14b) away from the first circumferential side (14a), such that the disc spring (5) is torsionally supported by the connecting tab (15) and the protrusion (16).

8. The torque transmission device (1) according to any one of claims 1 to 7, characterized in that, There is also a hub (17), two hub flanges (18, 19) and multiple spring units (20a, 20b), the hub being prepared for connection with a shaft, the hub flanges being used in coordination with the hub (17) and configured such that, depending on the torsional direction of the hub (17) relative to the hub flanges (18, 19), either the first hub flange (18) or the second hub flange (19) is connected to the hub (17) in a torque-transmitting manner, the spring units indirectly supporting the first hub flange (18) and the second hub flange (19) relative to each other in the circumferential direction, wherein the drive disc (3) is torsionally supported relative to the hub (17).

9. The torque transmission device (1) according to claim 8, characterized in that, The drive plate (3) is connected to the first hub flange (18) and the second hub flange (19) by means of friction devices (21, 22).

Images