Pulley decoupler with through hole

Abstract

The belt wheel decoupler (2) has a through-opening (17) which is formed by overlapping openings (16) in a plurality of components (12), wherein a closure component (18) is accommodated without play, which has a closed side face (19) for preventing penetration of particles between the components (12) in the region of the openings (16). At the same time, the closure component (18) forms a ventilation channel (20) through which an air flow (25) can pass in order to cool the torsional vibration damper (3), for example. This design is advantageous in particular when there is a lack of installation space, for example in a motor vehicle, and the torsional vibration damper (3) cannot flow freely, i.e. the torsional vibration damper is constructed, for example, in such a way that it is located close to the engine, for example between the engine of an internal combustion engine and the belt wheel decoupler (2).

Description

Technical Field

[0001] This invention relates to a pulley decoupler having a through-hole for fluid flow. The pulley decoupler is particularly suitable for belt-driven systems in motor vehicles. Background Technology

[0002] WO 2015 / 010190 A1, for example, discloses a pulley decoupling device for use in automobiles. Modern automobiles are becoming increasingly space-constrained due to the increasing number of devices required, thus necessitating improved cooling of these devices. Summary of the Invention

[0003] In view of this, the technical problem to be solved by the present invention is to overcome at least in part the problems known in the prior art.

[0004] The solution of this invention to achieve the above-mentioned objectives lies in providing a pulley decoupler and a pulley decoupler module. Other advantageous technical solutions of the invention are also proposed. Further features of the preferred solutions can be combined with each other in a technically meaningful manner and can define other technical solutions of the invention. Furthermore, the features involved in the solutions will be described and explained in detail in the specification, wherein other preferred technical solutions of the invention are shown.

[0005] The proposed pulley decoupler includes multiple components, including at least one hub for connection to a shaft rotatable about a rotation axis, an input component, and an output component, wherein the hub is connected to the input component or the output component in a torsion-transmitting manner, wherein at least two components have overlapping openings to form at least one opening through a through-hole of the pulley decoupler, wherein a closure component is inserted into the through-hole in a non-disengaging manner, the closure component being radially externally restricted by a closed side that internally defines a through-ventilation channel through which the pulley decoupler is flowable for fluid.

[0006] The pulley decoupling is preferably used in automobiles. When transmitting force from an input component connected to an axle (e.g., the drive shaft of an internal combustion engine) via a hub to an output component transmitting force via a traction element, particularly a belt, the pulley decoupling reduces rotational imbalance. For this purpose, a spring device is constructed between the input and output components, which generates a restoring force when the output component is deflected relative to the input component due to torsional vibration. A torsional connection refers to a connection where rotation of the hub causes rotation of the corresponding component (e.g., the input component). In particular, an anti-torsional connection exists.

[0007] The term "anti-detachment" refers to the inability to remove the sealing member from the through-hole without damage. The through-hole can have any shape, particularly cylindrical, cubic, or cylindrical with an elliptical cross-section. The shape of the sealing member is adapted accordingly. The openings in the individual members either overlap completely to form a through-hole that passes through the pulley separator along the axis of rotation. The sealing member has closed sides and opens at the end face, such that the ventilation passage is radially closed on the outside and axially open at the end face. Multiple through-holes are preferably constructed. A corresponding sealing member is preferably constructed in each through-hole. The sealing member is particularly made of metal, preferably steel and / or plastic. The hub, in particular, has a tooth structure corresponding to the external tooth system of the shaft.

[0008] The output component preferably does not have a corresponding opening. The component preferably also includes a diaphragm spring, an intermediate disk, and / or one or all intermediate disk components constituting the intermediate disk.

[0009] The enclosed components allow for the formation of ventilation channels through the pulley decoupler while simultaneously preventing particles or contaminants from penetrating between these components through their closed sides. Openings in these components form the through-holes. Air can flow through the ventilation channels as a fluid to serve as a cooling medium, preventing airborne particles from accumulating on or between these components. The through-holes extend through these components.

[0010] The closing member is preferably constructed, at least partially, as a hollow cylinder. This hollow cylinder can have a circular or elliptical cross-section. Hollow cylinders are easy to manufacture and can be easily installed in through holes.

[0011] The sealing member is preferably connected to the member in the through-hole by a material bonding method. Material bonding, such as welding, brazing, or adhesive bonding, is easy to establish, thus ensuring the sealing member is reliably and securely fixed in the through-hole. In this regard, it is preferable that the sealing member is bonded to the through-hole. This is particularly advantageous when the sealing member is made of plastic.

[0012] The sealing member is preferably pressed into the through-hole. This is particularly advantageous when the sealing member is made of metal or plastic. This press-fit connection can be easily established. The sealing member is preferably connected to at least one member by a crimp. In this case, it is particularly preferred that the sealing member expands radially during pressing, so that the sealing member is firmly fixed in the opening. This can be achieved, for example, by selective axial compression of the sealing member.

[0013] The closure member preferably has a flange on one side, which abuts against the component. During installation, the flange makes it easier, especially axially, to fix the closure member in a predefined position.

[0014] The pulley decoupler preferably has an intermediate disc with a two-part construction, wherein the sealing member extends through an opening in a portion of the intermediate disc. Therefore, the first intermediate disc member preferably has an opening that is part of the through-hole, while the second intermediate disc member does not have a corresponding opening but instead forms a stop for the sealing member, without thereby blocking the ventilation channel. This achieves a simple structure and easy installation of the pulley decoupler.

[0015] Preferably, the sealing member abuts against the abutment portion on at least one side along the direction of the rotation axis to be axially fixed. This allows for precise axial positioning of the sealing member, thereby simplifying the installation of the pulley decoupling device.

[0016] Furthermore, a pulley decoupler module is proposed, comprising the pulley decoupler and torsional vibration damper as described above, the torsional vibration damper being torsionally connected to the input or output component of the pulley decoupler. Damping efficiency can be further improved by using a torsional vibration damper or torsional damper. The ventilation channel of the pulley decoupler preferably allows cooling air to be fed to the torsional vibration damper. This is particularly advantageous when space is limited, or when cooling of the torsional vibration damper must be assisted solely by free convection (specifically, by means of cooling air being drawn in, for example, through the ventilation channel of the pulley decoupler and guided along the surface of the torsional vibration damper).

[0017] The details and advantages disclosed regarding the pulley decoupler can be applied to the pulley decoupler module, and vice versa.

[0018] For the avoidance of doubt, the numerals used herein (“first,” “second,” etc.) are primarily (only) used to distinguish several similar objects, dimensions, or processes; that is, in particular, no presupposition is made regarding the correlation and / or order of these objects, dimensions, or processes. If a correlation and / or order is required, it will be explicitly stated herein, or it will be obvious to those skilled in the art when studying the specifically described technical solutions. Attached Figure Description

[0019] The present invention and its technical environment will now be described in detail with reference to the accompanying drawings. It should be noted that the present invention is not limited to the embodiments shown. Unless otherwise expressly stated, certain aspects of the facts illustrated in the drawings can be extracted and combined with other components and understandings in this specification and / or the drawings. In particular, it should be noted that the drawings and, in particular, the dimensional ratios shown are merely schematic. The same reference numerals denote the same objects; therefore, the description of other drawings may be supplementarily considered as needed. Wherein:

[0020] Figure 1 A partial view of a first embodiment of the pulley decoupling module;

[0021] Figure 2 A partial view of an embodiment of the closed member;

[0022] Figure 3 A partial view of a second embodiment of the pulley decoupling module;

[0023] Figure 4 This is a partial view of a third embodiment of the pulley decoupling module. Detailed Implementation

[0024] Figure 1 A first embodiment of a pulley decoupling module 1 is shown schematically. This module includes a pulley decoupling unit 2 and a torsional vibration damper 3 connected thereto. The pulley decoupling unit 2 includes an input component 4, which is connected to a shaft (e.g., the drive shaft of an internal combustion engine) via a hub 5. In this case, the input component 4 is connected to an output component 8 via a spring device 7. The spring device 7 includes a plurality of bow springs. The output component 8 has a belt working surface 9, on which, in the installed state, a traction element (not shown), in particular a belt, rests to transmit torque between the shaft and the traction element. This traction element has a shape corresponding to the shape of the belt working surface 9. In this case, the shaft, hub 5, and input component 4 rotate about a common rotation axis 10. The output component 8 is supported on the hub 5 by a sliding bearing 11. The torsional vibration damper 3 is specifically constructed as a viscous torsional vibration damper, in which a shearable viscous liquid is used as the damping medium.

[0025] Here, as described above, the pulley decoupler 2 is composed of multiple components 12. In this embodiment, these components include an input component 4, a hub 5, a spring device 7, a sliding bearing 11, and an output component 8, and may also include other components as appropriate. When installing the pulley decoupler 2, it is at least partially composed of component groups comprising multiple, i.e., at least two, components 12 respectively. In the present case, a first component group 13 is constructed, which, in addition to the flange 5 and the input component 4, includes a diaphragm spring 14 and an intermediate disc 15. At least two components 12 of the first component group 13 (in the present case, all components 12 of the first component group) each have an overlapping opening 16, thereby forming a through hole 17 through all components of the first component group 13. A sealing component 18 is inserted into the through hole 17 in a non-detachable manner. This sealing component is radially restricted externally by a closed side 19, which internally defines a through ventilation channel 20 through which the pulley decoupler 2 is flowable for fluids (e.g., air). In this configuration, side 19 prevents particles from penetrating through opening 16 into the spaces between components of component assembly 13. The sealing member 18 is constructed as a hollow cylinder. Another gasket 21 is constructed to resist movement of the sealing member 18 in the direction of rotation axis 10, forming a stop for the sealing member 18 during installation. The sealing member 18 is inserted into the through-hole 17 in a medium-sealed manner, preventing air from flowing between the sealing member 18 and opening 16. This is specifically achieved by pressing, crimping, or bonding the sealing member 18 into the through-hole.

[0026] During operation, air can flow towards the torsional vibration damper 3 through the ventilation channel 20 to cool or assist in cooling the torsional vibration damper 3. Torsional vibration damper 3, intermediate plate 15, diaphragm spring 14 (see...) Figure 3 The input component 4, hub 5 and gasket 21 are connected by rivets 6.

[0027] Figure 2 This is a partial view of an embodiment of the closing member 18, wherein a surrounding closed bulge 23 is constructed on the outer diameter 22 of the closing member 18, the bulge abutting against the edge of the through hole 17 in the direction (axial) of the rotation axis 10 and achieving a seal, so that no fluid flow occurs between the closing member 18 and the through hole 17.

[0028] Figure 3 A second embodiment of the pulley decoupling module 1 is shown. Referring to... Figure 1 The implementation of the first embodiment shown should only be clarified here in terms of its differences from this embodiment. Unlike the first embodiment of the pulley coupler 2, here, the intermediate disc 15 is constructed such that it forms an abutment 24 for the closing member 18, thereby fixing the closing member axially. Furthermore, Figure 3Airflow 25 passing through ventilation channel 20 and along surface 26 of torsional vibration damper 3 is also shown.

[0029] Figure 4 A third embodiment of the pulley decoupling module 1 is shown. (Refer to the embodiment for...) Figure 1 and Figure 3 The embodiments of the first and second examples shown are intended to differ only from this embodiment. Unlike the first and second embodiments, the intermediate disk 15 is divided into two parts: a first intermediate disk member 27 and a second intermediate disk member 28. The first intermediate disk member 27 has an opening 16 that facilitates the realization of the through hole 17, while the second intermediate disk member 28 is constructed in a manner that forms an abutment 24 for closing the member 18. This is shown supplementarily, but is not limited to, the following: Figure 4 In one embodiment, the closure member 18 has a flange 29 by means of which it abuts against member 12 (here, hub 5). This secures the closure member 18 axially, particularly during installation.

[0030] The pulley decoupler 2 has a through-hole 17, which is formed by overlapping openings 16 in a plurality of components 12, through which a sealing member 18 is housed in a non-detachable manner. This sealing member has closed sides 19 to prevent particles from penetrating between the components 12 in the area of ​​the openings 16. Simultaneously, the sealing member 18 forms a ventilation channel 20 through which airflow 25 can pass to, for example, cool the torsional vibration damper 3. This is particularly advantageous when, for example, in a car, structural space is limited and the torsional vibration damper 3 cannot circulate freely, i.e., when the torsional vibration damper 3 is constructed, for example, close to the engine, such that the torsional vibration damper 3 is located between the engine, for example, an internal combustion engine, and the pulley decoupler 2.

[0031] List of reference numerals

[0032] 1. Belt pulley decoupling module

[0033] 2-Pulley Decoupling

[0034] 3 Torsional vibration dampers

[0035] 4 Input Components

[0036] 5-inch wheels

[0037] 6 rivets

[0038] 7. Spring device

[0039] 8 output components

[0040] 9 Belt Working Face

[0041] 10 rotating axes

[0042] 11 sliding bearings

[0043] 12 components

[0044] 13 component groups

[0045] 14 Diaphragm Springs

[0046] 15 middle plates

[0047] 16 openings

[0048] 17 through holes

[0049] 18 closed components

[0050] 19 Side View

[0051] 20 ventilation ducts

[0052] 21 gasket

[0053] 22 outer diameter

[0054] 23 bulges

[0055] 24th Reception Department

[0056] 25 airflow

[0057] 26 surfaces

[0058] 27 First intermediate plate component

[0059] 28 Second intermediate plate component

[0060] 29 flanges

Claims

1. A pulley decoupling device (2) comprising a plurality of components (12), said plurality of components including at least one hub (5) for connection to a shaft rotatable about a rotational axis (10), an input component (4), and an output component (8), wherein, The hub (5) is connected to the input component (4) or the output component (8) in a torsion-transmitting manner, wherein at least two components (12) have overlapping openings (16) that form at least one opening through a through hole (17) of the pulley decoupler (2), wherein a closing component (18) is inserted into the through hole (17) in a non-detachable manner, the closing component restricting the radially outer boundary by a closed side (19) that internally defines a through ventilation channel (20) through which fluid can flow through the pulley decoupler (2).

2. The pulley decoupling device (2) according to claim 1, wherein, The closed component (18) is at least partially constructed as a hollow cylinder.

3. The pulley decoupling device (2) according to claim 1, wherein, The closing member (18) is connected to the member (12) in the through hole (17) by means of material bonding.

4. The pulley decoupling device (2) according to claim 3, wherein, The closing member (18) is connected to the member (12) by means of adhesive into the through hole (17).

5. The pulley decoupling device (2) according to any one of claims 1-4, wherein, The closing member (18) is pressed into the through hole (17).

6. The pulley decoupling device (2) according to any one of claims 1-4, wherein, The closing member (18) is connected to at least one member (12) by a rolled edge.

7. The pulley decoupling device (2) according to any one of claims 1-4, wherein, The closing member (18) has a flange (29) on one side, and the closing member (18) abuts against the member (12) by means of the flange.

8. The pulley decoupling device (2) according to any one of claims 1-4, wherein, The pulley decoupler (2) has an intermediate disk (15) with a two-part construction scheme, wherein the closing member (18) extends through an opening in a component (27) of the intermediate disk (15).

9. The pulley decoupling device (2) according to any one of claims 1-4, wherein, The closing member (18) is axially fixed by abutting the abutting part (24) at least on one side along the direction of the rotation axis (10).

10. A pulley decoupling module (1) comprising a pulley decoupling device (2) according to any one of the preceding claims and a torsional vibration damper (3), the torsional vibration damper being torsionally connected to an input component (4) or an output component (8) of the pulley decoupling device (2).

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