阅读说明：本技术 扭振阻尼器和包括该扭振阻尼器的液力变矩器 (Torsional vibration damper and hydrodynamic torque converter comprising the same ) 是由 D·施纳德尔巴赫 于 2020-03-10 设计创作，主要内容包括：本发明涉及一种扭振阻尼器(1)和包括该扭振阻尼器的液力变矩器。扭振阻尼器(1)具有可以绕旋转轴线(d)旋转的输入部分(2)以及输出部分(6)。在输入部分(2)与输出部分(6)之间布置有中间法兰(12),该中间法兰抵靠沿周向方向作用的相应的弹簧装置(19、20),并且中间法兰(12)由两个轴向间隔开的相互连接的侧向部分(14、15)制成,侧向部分在所述侧向部分之间轴向地接纳输入部分(2)和输出部分(6)。为了改进弹簧装置(19、20)的加载,弹簧装置(19、20)借助于中间法兰(12)的加载至少部分地由布置在侧向部分(14、15)之间的加载构件(27)提供。(The invention relates to a torsional vibration damper (1) and a hydrodynamic torque converter comprising the torsional vibration damper. The torsional vibration damper (1) has an input section (2) which can be rotated about a rotational axis (d) and an output section (6). An intermediate flange (12) is arranged between the input part (2) and the output part (6), which intermediate flange bears against a respective spring device (19, 20) acting in the circumferential direction, and the intermediate flange (12) is made of two axially spaced-apart, mutually connected lateral parts (14, 15), which axially receive the input part (2) and the output part (6) between them. In order to improve the loading of the spring device (19, 20), the loading of the spring device (19, 20) by means of the intermediate flange (12) is at least partially provided by a loading member (27) arranged between the lateral portions (14, 15).)

1. A torsional vibration damper (1, 1a) having an input portion (2) rotatable about an axis of rotation (d) and an output portion (6), between which input portion (2) and output portion (6) intermediate flanges (12, 12a) are arranged, which abut against respective spring means (19, 20) acting in a circumferential direction, and which intermediate flanges (12, 12a) are made of two axially spaced-apart, mutually connected lateral portions (14, 14a, 15a), which axially receive between them the input portion (2) and the output portion (6), characterized in that the spring means (19, 20) are at least partly formed by a spring element arranged between the lateral portions (14, 14a, 15, b) by means of loading of the intermediate flanges (12, 12a), 15a) Is provided with a loading member (27, 27 a).

2. A torsional vibration damper (1, 1a) according to claim 1, characterized in that the loading member (27, 27a) is additionally formed by at least one lateral portion (14, 14a, 15 a).

3. The torsional damper (1) according to claim 1 or 2, characterized in that the loading member (27) is formed by a spacer bolt (13) at least partially connecting the lateral portions (14, 15).

4. Torsional vibration damper (1a) according to one of claims 1 to 3, characterized in that the loading member (27a) is formed by a sheet metal part or a rivet (31a) connected with at least one lateral part (15 a).

5. Torsional vibration damper (1, 1a) according to one of claims 1 to 4, characterized in that the spring means (19, 20) are formed by linearly designed helical compression springs (21, 21a, 22a, 23a, 24a) received in spring windows (25, 25a, 26a) of the lateral parts (14, 14a, 15 a).

6. Torsional vibration damper (1, 1a) according to claim 5, characterized in that at least one spring means (19, 20) is formed by nested helical compression springs (21, 21a, 22a, 23a, 24a) designed as inner and outer springs.

7. A torsional vibration damper (1, 1a) according to claim 6, characterized in that at least said inner spring is loaded by said loading member (27, 27a) arranged between said lateral portions (14, 14a, 15 a).

8. The torsional vibration damper (1, 1a) according to one of claims 5 to 7, characterized in that the loading member (27, 27a) arranged between the lateral portions (14, 14a, 15a) is adapted to the end faces of the helical compression spring (21, 21a, 22a, 23a, 24a) in the circumferential direction.

9. A torque converter with a torsional vibration damper (1, 1a) having the features of one of claims 1 to 8, characterized in that the torsional vibration damper (1, 1a) is operatively arranged between an output portion and an output hub (5) of a converter bridge clutch arranged between the housing and the output hub of the torque converter, in a housing of the torque converter, and the intermediate flange (12, 12a) is connected to a turbine wheel driven by a pump wheel connected to the housing.

10. A hydrodynamic torque converter according to claim 9, characterized in that the input portion (2) and at least one lateral portion (15, 15a) of the torsional damper (1, 1a) are centered on the output hub (5) in a rotationally limited manner, and the output portion (6) is connected to the output hub (5) in a rotationally fixed manner.

Technical Field

The invention relates to a torsional vibration damper and a hydrodynamic torque converter comprising the torsional vibration damper, wherein the torsional vibration damper has an input part which can rotate about a rotation axis and an output part, wherein an intermediate flange is arranged between the input part and the output part, which intermediate flange bears against a corresponding spring device acting in the circumferential direction, and the intermediate flange is made of two axially spaced, interconnected lateral parts which axially receive the input part and the output part between the lateral parts.

Background

A common torsional vibration damper, for example for a hydrodynamic torque converter, is used in the drive train of a motor vehicle to isolate torsional vibrations from those of an internal combustion engine which is subject to torsional vibrations. For example, a torsional vibration damper of this type may be provided between the converter bridge clutch and the output hub and/or between a turbine wheel driven by a pump wheel of the torque converter and the output hub.

Document DE 102010014674 a1, for example, shows a hydrodynamic torque converter with a torsional vibration damper arranged in its housing. The torsional vibration damper has: an input portion connected to the turbine wheel and the converter bridge clutch; an output portion connected to an output hub; and an intermediate flange connected in series between the input section and the output section by means of a spring arrangement. The intermediate flange bears the centrifugal pendulum.

Disclosure of Invention

The object of the invention is to develop a torsional vibration damper of the generic type and a hydrodynamic torque converter having such a torsional vibration damper. In particular, it is an object of the invention to design the loading of the spring device in an advantageous manner.

This object is achieved by the subject matter of claims 1 and 9. The dependent claims represent advantageous embodiments of the subject matter of claims 1 and 9.

The proposed torsional vibration damper is used in particular for torsional vibration isolation in a drive train of a motor vehicle having an internal combustion engine which is subject to torsional vibrations. In an advantageous embodiment, the torsional vibration damper is integrated into the housing of the hydrodynamic torque converter. The torsional vibration damper comprises an input part which can be rotated about an axis of rotation and an output part, wherein an intermediate flange is provided between the input part and the output part, which intermediate flange is arranged to abut against a spring device acting in the circumferential direction.

The intermediate flange is formed of two axially spaced, interconnected lateral portions that receive the input and output portions therebetween. A centrifugal pendulum can be arranged on the intermediate flange, said centrifugal pendulum being used to increase the torsional vibration isolation of the torsional vibration damper. The two lateral portions can serve as pendulum mass carriers for pendulum masses distributed over the circumference, for example, in the order of two to four. A pendulum mass, for example made of a plurality of sheet metal parts, is arranged axially between the lateral parts. The lateral parts and the pendulum mass have axially aligned recesses with raceways on which the pendulum rollers roll in an axially overlapping manner with the recesses.

The input portion and the output portion may be designed as disk portions formed axially adjacent to each other. The lateral portion of the hydrodynamic torque converter facing the converter bridge clutch can be radially shortened on the inside, so that a connection, such as a rivet connection, can be formed between the output portion of the converter bridge clutch and the input portion of the torsional vibration damper. The input portion may be centered on the output hub and the output portion may be connected to the output hub in a rotationally fixed manner. For example, the output section and the output hub can be designed in one piece, riveted to one another or connected to one another by means of internal and external teeth in a rotationally fixed manner with axial play.

Advantageously, the disk portion may have an active region for the spring means arranged in one plane. To this end, portions of the disk portion can axially overlap and be designed radially one above the other, so that spring means, for example designed as helical compression springs, each act axially centrally with respect to their cross section by the input portion or the output portion.

The spring means may each be formed by a helical compression spring of linear design distributed over the circumference. The helical compression springs may each be individually accommodated in a circumferential direction in a restrained manner. Alternatively, a so-called helical compression spring assembly may be provided in which a plurality of helical compression springs are nested with one another as inner and outer springs. The helical compression springs of the helical compression spring assembly may have different lengths for setting a multi-step characteristic curve of the torsional force over the rotation angle of the torsional vibration damper. Different helical compression springs and/or different helical compression spring assemblies may be arranged in different circumferential directions with respect to the intermediate flange. The helical compression springs may be arranged on different diameters. The helical compression springs of the two spring devices are preferably arranged on the same diameter and alternate in the circumferential direction.

The end face of each helical compression spring, which is arranged opposite the application region of the input or output part in the circumferential direction, is acted upon by a lateral part. For this purpose, axially aligned spring windows are provided in the lateral portions of the intermediate flange, into which spring windows the helical compression springs or helical compression spring assemblies are inserted in a constrained manner and are radially supported against centrifugal forces. The radial wall of the spring window serves as an application area for the intermediate flange.

The application region of the input section and/or the output section may be planar or have lugs which extend in the circumferential direction and engage in the interior of at least one part of the helical compression spring. The lug may be designed such that: the ends of the helical compression spring are pulled radially inwardly during loading and thus radially outwardly prevent or at least reduce friction between the ends.

When the torsional vibration damper is unloaded, the disk portion preferably has a recess for the helical compression spring which is axially aligned with the spring window and which opens radially outwards, wherein at least one disk portion has a support on it which extends through the helical compression spring in the circumferential direction.

The input section, the intermediate flange and the output section are arranged in series by means of helical compression springs acting in the circumferential direction, and the input section and the output section can be designed as axially adjacent disk sections which are arranged between two axially spaced and mutually connected lateral sections of the intermediate flange.

In order to provide a reliable loading of the spring device, in particular independently of the design of the spring device, the loading of the spring device by means of the intermediate flange is at least partially provided by a loading member arranged between the lateral portions. This means that alternatively or in addition to at least one of the lateral parts, the spring device, in particular a spring device designed as a helical compression spring, can be loaded by means of a component arranged axially between these lateral parts. For example, an overlap of at least 50% of the cross-sections of all the helical compression springs hinged by the intermediate flange may be provided.

In particular, when using nested helical compression springs, wherein the outer spring has a large diameter, and thus axially spaced lateral portions, a reliable loading of the inner spring can be ensured by means of the proposed loading member. Here, at least the inner spring may be loaded by a loading member arranged between the lateral portions. The outer spring may be loaded only by the wall of the spring window receiving the outer spring and/or by a loading member arranged between the lateral portions.

The loading member arranged between the lateral portions may be at least partially formed by a spacer bolt connecting the lateral portions. The loading member may additionally be formed by at least one lateral portion.

The loading member may be formed by a sheet metal portion or a rivet connected with at least one lateral portion. For example, a rivet, such as a stop rivet, which is connected to the lateral part on one side, can be provided in the circumferential direction between two end faces of the helical compression spring which are adjacent in the circumferential direction. Furthermore, a sheet metal disc or the like may be connected, e.g. welded, to the lateral portion at this point.

The loading member arranged between the lateral portions may be adapted to the end face of the helical compression spring in the circumferential direction, for example the loading member may be designed to be flat or adapted to the path of the end turns of the helical compression spring.

The proposed hydrodynamic torque converter is used in particular in the drive train of a motor vehicle for transmitting torque from the crankshaft of an internal combustion engine to the transmission input shaft of a transmission while adjusting possibly different speeds and increasing the torque during a start-up phase of the motor vehicle. For this purpose, the torque converter comprises a housing, to which the pump wheel is joined in a rotationally fixed manner or can be connected by means of a separate clutch. The pump wheel drives the turbine wheel in a hydrodynamic manner. The torque introduced into the torque converter is converted via an output hub, which can be connected to the turbine wheel or to the turbine wheel, for example by means of an idler wheel, in an excessive manner to a transmission input shaft of a transmission, for example a multi-stage automatic transmission.

In order to bypass the torque converter, for example after completion of the starting process, a converter bridge clutch integrated into the housing can be provided between the housing and the output hub. A first torsional vibration damping device is disposed between the output portion of the converter bridge clutch and the output hub. The turbine wheel is rotatably received on the output hub against the action of a second torsional vibration device, a so-called turbine damper.

Two torsional vibration damping devices are provided by means of the proposed single torsional vibration damper. Here, the input section of the torsional vibration damper is connected to the output of the converter bridge clutch and the output section of the torsional vibration damper is connected to the output hub. The torsional vibration damper has an intermediate flange which is effectively arranged between the input part and the output part by means of a spring device acting in the circumferential direction.

To connect the turbine wheel to the torsional vibration damper, the turbine wheel is connected to the intermediate flange in a rotationally fixed manner, for example riveted and centered on the output hub. In order to increase the torsional vibration isolation of the torsional vibration damper when the converter bridging clutch is opened and closed, a centrifugal pendulum is accommodated on the intermediate flange. By designing all pendulum masses to be of the same type and the pendulum supports of the pendulum masses to have a predetermined pendulum path opposite the intermediate flange, the centrifugal pendulum can be matched to a single damper stage. Alternatively, two damper arrangements may be provided which are matched to the oscillation mode of the open and closed converter bridge clutch and/or to a different number of cylinders operated by the internal combustion engine. For example, the two pendulum masses can have different masses and/or different pendulum paths arranged between the pendulum mass carrier and the pendulum mass by means of a corresponding design of the raceways of the pendulum support. When the converter bridging clutch is closed, the turbine mass can be used as an additional damping mass for the intermediate flange.

Drawings

The present invention is explained in more detail with reference to the exemplary embodiments shown in fig. 1 to 3. In the drawings:

figure 1 shows in a sectional view an upper part of a torsional vibration damper arranged to be rotatable about an axis of rotation,

figure 2 shows the torsional vibration damper of figure 1 in a partial view,

and

fig. 3 shows in cross-section the upper part of an improved torsional vibration damper compared to the torsional vibration damper of fig. 1 and 2.

Detailed Description

Fig. 1 shows an upper part of a torsional vibration damper 1 in a sectional view, which can be rotated about a rotational axis d. The input part 2 is connected to an output side plate carrier 3 of a converter bridging clutch of the hydrodynamic torque converter by means of rivets 4 distributed over the circumference. The input part 2 is received on the output hub 5 in a rotationally centered manner. The output portion 6 is non-rotatably connected to the output hub 5. The input section 2 and the output section 6 are designed as disc sections 7, 8 arranged parallel to each other. The disk portion 7 is axially fixed and rotatably received by means of a locking washer 9 and an annular rim 10 of the output hub 5, and the disk portion is centered on the output hub 5. The disk portion 8 is axially pretensioned between the annular rim 10 and the thrust washer 11 and is held in a non-rotatable manner on the output hub 5 by means of a toothing, not shown.

The intermediate flange 12 is formed by two axially spaced apart lateral portions 14, 15 connected to each other by means of spacer bolts 13. The disk portions 7, 8 are axially received between the lateral portions 14, 15 of the intermediate flange 12. The lateral portion 14 facing the board carrier 3 is radially recessed on the inside so that the board carrier 3 can be connected to the input portion 2.

The lateral parts 14, 15 form a pendulum mass carrier 16 of the centrifugal pendulum 17 and receive pendulum masses 18 distributed over the circumference between them, which pendulum masses are formed, for example, from riveted sheet metal disks. The pendulum mass 18 is suspended in the centrifugal force field of the torsional vibration damper 1 rotating about the axis of rotation d by means of a pendulum support, not shown, on the pendulum mass carrier 16, so that the pendulum mass can be swiveled along a predetermined pendulum path.

The spring means 19, 20 act between the input part 2, the intermediate flange 12 and the output part 6. The spring means 19, 20 are arranged in series, i.e. the spring means 19, 20 effectively arranged between the input part 2 and the intermediate flange 12 and between the intermediate flange 12 and the output part 6 are loaded in series when the input part 2 rotates about the axis of rotation d relative to the output part 6 according to the direction of the applied torque.

The spring means 19, 20 are formed by linear, nested helical compression springs 21, 22, 23, 24 arranged distributed over the circumference.

The thrust washer 11, which is made in particular of plastic and is suspended in a rotationally fixed manner in the lateral portion 15, limits the axial play of the intermediate flange 12. The intermediate flange 12 is rotatably received and centered on the output hub 5 by means of the lateral portions 15. The helical compression springs 21, 22, 13, 24 are accommodated in a constrained manner in spring windows 25, 26 of the lateral portions 14, 15 and are radially supported on the outside.

The loading of the helical compression springs 21, 22, 23, 24 in the circumferential direction takes place in each case by means of loading members of the disk portions 7, 8 of the input part 2 and the output part 6 on one end face of the helical compression springs 21, 22, 23, 24 and by means of loading members 27 of the intermediate flange 12 on each of the opposite end faces, which loading members cannot be seen from this sectional view.

Due to the axially necessary structure and diameter of the helical compression springs 21, 23, which are designed as outer springs, the spacer bolts 13 arranged between the lateral portions 14, 15 are arranged at the radial height of the helical compression springs 21, 22, 23, 24 and serve as loading members 27 of the intermediate flange 12 to increase the coverage of the cross section of the end faces of the helical compression springs 21, 22, 23, 24, for example to greater than or equal to 50%, and thus provide a sufficient loading of the helical compression springs. In the exemplary embodiment shown, the radial walls of the spring windows 25, 26 load the outer helical compression springs 21, 23 and overlap only the inner helical compression springs 22, 24. The lateral portions 14 are curved in order to increase the overlap in the area of the cross-section of the helical compression springs 21, 23. To further improve the covering, a spacer bolt 13 is also provided, which loads a portion of the outer helical compression springs 21, 23 and a majority of the inner helical compression springs 22, 24. The diameter D of the spacer bolt 13 is enlarged in such a way that: the spacer bolts are substantially identical to the radial walls of the spring windows 25, 26. In this way, a planar loading of the helical compression springs 21, 22, 23, 24, in particular of the inner helical compression springs 22, 24, is achieved without the need to provide additional parts.

Fig. 2 shows the torsional vibration damper 1 of fig. 1 in a partial view, with the front lateral section 14 (fig. 1) removed and the input side disc section 7 (fig. 1) removed. The arrangement of the pendulum masses 18 of the centrifugal pendulum 17, which are distributed radially outside the spring devices 19, 20 with the nested helical compression springs 21, 22, 23, 24, is clearly visible from this illustration. The pendulum mass 18 is received in a pendulum-like manner on the intermediate flange 12 by means of a pendulum support 28.

The helical compression springs 21, 22, 23, 24 are received in the spring windows 26 and are loaded on the one hand by the loading means 29 of the disk portion 8 of the output part 6 and the loading means of the disk portion 8 of the input part, which are not visible, and on the other hand by the loading means 27 of the intermediate flange 12. The loading member 27 is formed by the radial walls 30 of the lateral portions 14, 15 (fig. 1) and the spacer bolt 13.

Fig. 3 shows an upper part of the torsional vibration damper 1a arranged about the axis of rotation d in a sectional view. Compared to the torsional damper 1 of fig. 1 and 2, the loading member 27a of the intermediate flange 12a is additionally formed by a rivet 31a inserted in the lateral portion 15a in the circumferential direction between the spring windows 25a, 26a at the radial level of the helical compression springs 21a, 22a, 23a, 24a, between the spring windows 25a, 26a, in addition to the radial wall 30a of the spring windows 25a, 26a forming the lateral portion 14a, 15a of the intermediate flange 12 a. The lateral portion 14a, which is curved in the region of the wall 30a, loads the inner helical compression springs 22a, 24a and the outer helical compression springs 21a, 23 a. The lateral portion 15a loads the outer helical compression springs 21a, 23 a. The rivets 31a introduced into the lateral portion 15a each load the inner helical compression springs 22a, 24 a. The position of the not shown spacer bolts connecting the lateral parts 14a, 15a can be chosen to be outside the diameter of the helical compression springs 21a, 22a, 23a, 24 a.

Description of the reference numerals

1 torsional damper 1A torsional damper 2 input part 3 plate carrier 4 rivet 5 output hub 6 output part 7 disk part 8 disk part 9 lock washer 10 annular rim 11 thrust washer 12 center flange 12a center flange 13 spacer bolt 14 side part 14a side part 15a side part 16 pendulum mass carrier 17 centrifugal pendulum 18 pendulum mass 19 spring means 20 spring means 21A helical compression spring 22a helical compression spring 23a helical compression spring 24a helical compression spring 25a spring window 26a spring window 27 loading member 27a loading member 28 pendulum support 29 loading member 30 wall 30a wall 31A rivet D diameter axis of rotation.