阅读说明：本技术 液力扭矩变换器和用于该液力扭矩变换器的扭振阻尼器 (Hydrodynamic torque converter and torsional damper for the same ) 是由 D·施纳德尔巴赫 于 2020-02-03 设计创作，主要内容包括：本发明涉及一种液力扭矩变换器和用于该液力扭矩变换器的扭振阻尼器,该液力扭矩变换器具有连接在驱动侧上的泵轮和由泵轮驱动的涡轮机轮,其中在液力扭矩变换器的壳体与输出毂(4)之间设置有扭振阻尼器(1)和输出部分(6),所述扭振阻尼器具有能够借助于变换器锁止离合器连接至壳体的输入部分(2),并且所述输出部分连接至输出毂(4),其中在输入部分(2)与输出部分(6)之间设置有中间凸缘(10),中间凸缘布置成在每种情况下与在周向方向上作用的弹簧装置(18、19)相反。为了以不影响安装空间的方式保护弹簧装置(18、19)免受损坏,与弹簧装置(18、19)的作用相反的中间凸缘(10)的旋转角度被径向限制在弹簧装置(18、19)内。(The invention relates to a hydrodynamic torque converter and a torsional vibration damper for a hydrodynamic torque converter having a pump wheel connected on the drive side and a turbine wheel driven by the pump wheel, wherein a torsional vibration damper (1) and an output part (6) are provided between a housing of the hydrodynamic torque converter and an output hub (4), the torsional vibration damper having an input part (2) which can be connected to the housing by means of a converter lock-up clutch, and the output part being connected to the output hub (4), wherein an intermediate flange (10) is provided between the input part (2) and the output part (6), which intermediate flange is arranged opposite in each case a spring device (18, 19) acting in the circumferential direction. In order to protect the spring means (18, 19) from damage without affecting the installation space, the angle of rotation of the intermediate flange (10) opposite the action of the spring means (18, 19) is radially limited within the spring means (18, 19).)

1. A hydrodynamic torque converter having a pump wheel connected on the drive side and a turbine wheel driven by the pump wheel, wherein a torsional vibration damper (1) having an input part (2) which can be connected to the housing by means of a converter lock-up clutch and an output part (6) which is connected to the output hub (4) are provided between the housing of the hydrodynamic torque converter and the output hub (4), wherein an intermediate flange (10) is provided between the input part (2) and the output part (6), which intermediate flange is arranged opposite to a spring device (18, 19) acting in the circumferential direction in each case, characterized in that the angle of rotation of the intermediate flange (10) opposite to the action of the spring device (18, 19) is radially limited to the spring device (18, 19), 19) And (4) the following steps.

2. Hydrodynamic torque converter according to claim 1, characterized in that the spring devices (18, 19) are each formed by a helical compression spring (20, 21) of linear design distributed over the circumference.

3. Hydrodynamic torque converter according to claim 2, characterized in that the helical compression springs (20, 21) of the two spring devices (18, 19) are arranged alternately in the circumference.

4. Hydrodynamic torque converter according to any one of claims 1 to 3, characterized in that the intermediate flange (10) is formed by two axially spaced, interconnected lateral portions (12, 13) which receive the input portion (2) and the output portion (6) between them.

5. A hydrodynamic torque converter according to claim 4, characterized in that the input part (2) is centered on the output hub (4) and the output part (6) is connected for common rotation with the output hub (4).

6. Hydrodynamic torque converter according to claim 5, characterized in that one of the disc-shaped parts (7) engages with torsional play in an axially opposite opening (15) of the output part of the converter lock-up clutch by means of at least one axially flared protrusion (14).

7. Hydrodynamic torque converter according to claim 6, characterized in that the output part is designed as a plate carrier (3) of the converter lock-up clutch.

8. Hydrodynamic torque converter according to any of claims 5 to 7, characterized in that at least one lateral portion (13) of the intermediate flange (10) is centered with torsional play and received in a rotatable manner along the torsional play on the output hub (4).

9. Hydrodynamic torque converter according to claim 8, characterized in that the output hub (4) has radially widened cams (23) distributed over the circumference, which engage with torsional play in recesses (24) recessed on the inner circumference of the at least one lateral portion (13).

10. Torsional damper (1), in particular for a hydrodynamic torque converter according to one of claims 1 to 9, having an input section (2) and an output section (6) and an intermediate flange (10), wherein the input section (2), the intermediate flange (10) and the output section (6) are arranged in series by means of spring means (18, 19) acting in the circumferential direction, wherein the input section (2) and the output section (6) are designed as axially adjacent disc-shaped portions (7, 8) arranged between two axially spaced and mutually connected lateral portions (12, 13) of the intermediate flange (10), characterized in that the angle of rotation of the intermediate flange (10) opposite the action of the spring means (18, 19) is limited radially to the spring means (18, 19), 19) And (4) the following steps.

Technical Field

The invention relates to a hydrodynamic torque converter and a torsional vibration damper for the hydrodynamic torque converter, the hydrodynamic torque converter having a pump wheel connected on the drive side and a turbine wheel driven by the pump wheel, wherein a torsional vibration damper is arranged between the housing of the torque converter and the output hub, the torsional vibration damper having an input section which can be connected to the housing by means of a converter bridge clutch and an output section which is connected to the output hub.

Background

Hydrodynamic torque converters are used in the drive train of motor vehicles to transfer torque between the crankshaft of an internal combustion engine and the transmission input shaft of a transmission while accommodating different speeds. For this purpose, the crankshaft drives the housing of the torque converter via a pump wheel which hydraulically drives the turbine wheel. An idler gear may also be provided to increase torque at low speeds. To prevent the torque converter from slipping at higher speeds, a so-called converter bridge clutch may be provided between the housing of the torque converter and the output hub. A torsional vibration damper may be provided between the converter bridge clutch and the output hub and/or between the turbine wheel and the output hub.

For example, document DE 102010014674 a1 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 the output hub, and an intermediate flange connected in series between the input portion and the output portion by means of a spring arrangement. The intermediate flange carries a centrifugal pendulum.

Disclosure of Invention

The object of the present invention is to develop a hydrodynamic torque converter in general and a torsional vibration damper for the hydrodynamic torque converter. In particular, it is an object of the invention to protect the spring means from damage.

This object is achieved by the subject matter of claims 1 and 10. The claims dependent on claim 1 represent advantageous embodiments of the subject matter of claim 1.

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

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 variator bridge clutch and the output hub. The turbine wheel is rotatably received on the output hub against the action of a second torsional vibration means, called a turbine damper.

Two torsional vibration damping means are provided by means of a single torsional vibration damper. Here, the input section of the torsional vibration damper is connected to the output of the converter bridge clutch, for example a plate carrier such as an outer plate carrier, while the output section 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 torsional vibration damper is connected to the intermediate flange in a non-rotatable manner, for example riveted on and centered on the output hub. In order to improve the torsional vibration isolation of the torsional vibration damper when the converter bridging clutch is opened and closed, a centrifugal pendulum is received on the intermediate flange. Due to the similar design of all pendulum masses and their pendulum bearings with a predetermined pendulum path opposite the intermediate flange, the centrifugal pendulum can be matched to a single damper in sequence. Alternatively, two damper devices can be provided, which are adapted 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. In this case, for example, two sets of pendulum masses with different masses and/or different pendulum trajectories, which are arranged between the pendulum mass carrier and the pendulum mass, can be provided by means of a corresponding design of the raceways of the pendulum bearing. When the converter bridge clutch is closed, the turbine mass may act as an additional damper mass for the intermediate flange.

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 captive manner on the circumference. Alternatively, a so-called helical compression spring assembly may be provided in which a plurality of helical compression springs are nested one inside the other. The helical compression springs of the helical compression spring assembly may have different lengths for setting a multi-level characteristic curve of the torsional force with respect to the rotational angle of the torsional vibration damper. Different helical compression springs and/or different helical compression spring assemblies may be arranged in different circumferential directions relative to the intermediate flange. The helical compression springs may be arranged on different diameters. Preferably, the helical compression springs of the two spring devices are arranged on the same diameter and are arranged alternately on the circumference.

According to an advantageous embodiment of the torsional vibration damper, the intermediate flange is formed by two axially spaced, interconnected lateral portions, which receive the input portion and the output portion therebetween. The two lateral portions serve as pendulum mass carriers for pendulum masses distributed over the circumference, for example in a two to four order. 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 recesses axially aligned with the raceways on which the pendulum rollers axially overlapping the recesses roll.

The input portion and the output portion may be designed as disc-shaped portions, which are formed axially adjacent to each other. The lateral portion facing the converter bridging clutch can be radially shortened on the inside, so that a connection, for example a rivet connection, can be formed between the output portion of the converter bridging 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 non-rotatably connected to the output hub. For example, the output part and the output hub can be designed in one piece, riveted to one another or connected to one another in a rotationally fixed and axially play-free manner by means of inner and outer toothing.

In an advantageous manner, the disk-shaped part can have a loading region which is arranged in one plane of the end face for the helical compression spring. For this purpose, the portions of the disk portion can be designed to overlap axially and radially one above the other, so that the helical compression springs are each loaded axially centrally with respect to their cross section by the input portion or the output portion. The end faces of the respective helical compression springs, which are located opposite the loading region of the input or output section in the circumferential direction, are loaded by the lateral sections. To this end, axially aligned spring windows are provided in the lateral portions of the intermediate flange, into which circumferentially aligned spring windows a helical compression spring or a helical compression spring assembly is inserted in a captive manner and is radially supported against centrifugal forces. The radial wall of the spring window serves as a loading area for the intermediate flange.

The loading area of the input portion and/or the output portion may be planar or have lugs extending in the circumferential direction and engaging in the interior of at least one portion of the helical compression spring. The lugs may be designed such that the helical compression spring ends are pulled radially inwardly during loading and thus friction between the lugs and the helical compression spring ends is prevented or at least reduced on the radially outer side.

When the torsional vibration damper is not loaded, the disk portion preferably has a radially outwardly open recess for the helical compression spring in axial alignment with the spring window, wherein the bearing extends through the helical compression spring in the circumferential direction on at least one disk portion.

In order to protect the helical compression spring from damage, for example by blocking it, the angle of rotation of the intermediate flange is limited. In a preferred manner, the angle of rotation of the intermediate flange between the input section and the output section of the torsional vibration damper is limited to, for example, at least ± 15 °. It has proven advantageous here to provide a stop limit of the intermediate flange radially inside the spring device. Thus, the input portion dished portion and the output portion dished portion may be substantially limited by the diameter of the helical compression spring. The stop of the intermediate flange, for example a spacer bolt between the two lateral portions, can be displaced further radially inwards, for example in the circumferential direction, between the helical compression springs. By means of these measures, the pendulum masses of the centrifugal pendulum, which may be received on the intermediate section, can be designed and dimensioned larger without recesses for the stop and with the same diameter of the torsional vibration damper, so that they can increase the torsional vibration damping due to the added masses or increased pendulum angles.

According to an advantageous embodiment of the hydrodynamic torque converter or the torsional vibration damper, one of the lateral portions, preferably the lateral portion adjacent to the converter bridge clutch, can have at least one projection, preferably two to four projections, preferably three projections, distributed over the circumference, which are circumferentially open in axially opposite openings of the output portion of the torque converter bridge clutch with torsional play. After the torsional play is exhausted, the stop of the projection on the wall of the opening limits the angle of rotation of the intermediate flange of the torsional damper in the circumferential direction relative to the input section. The output part can be designed, for example, as a plate carrier, in particular as an output-side outer plate carrier of the converter bridge clutch.

The angle of rotation between the intermediate flange of the torsional vibration damper and the output portion can be limited, since at least one lateral portion of the intermediate flange, in particular the lateral portion connected to the turbine wheel, is centered with torsional play and is rotatably received along the torsional play on the output hub. For this purpose, the output hub can have one or, for example, between two and four radially widened cams distributed over the circumference, which engage with torsional play in recesses in the inner circumference of at least one lateral part.

The object is also achieved by a torsional vibration damper, in particular for a hydrodynamic torque converter having the features listed above, with an input section and an output section and with an intermediate flange, wherein 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 are designed as axially adjacent disk sections which are arranged between two axially spaced and interconnected lateral sections of the intermediate flange. The limitation of the torsional play to protect the helical compression spring from the blocking position is arranged radially inside the spring device, for example between the output section, for example the plate carrier of the converter bridge clutch, and the lateral section of the intermediate flange, or between the output hub and the lateral section of the intermediate flange.

Drawings

The present invention is described in more detail with reference to the exemplary embodiments shown in fig. 1 to 5. In the drawings:

figure 1 shows in cross-section the upper part of a torsional vibration damper arranged to be rotatable about an axis of rotation,

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

figure 3 shows a detail of the torsional vibration damper of figures 1 and 2 in the region of the output hub,

figure 4 shows a detail of the torsional vibration damper of figures 1 and 2 in the region of the plate carrier,

and

fig. 5 shows a detail of the torsional vibration damper of fig. 1 and 2 in the region of the stop between the input section and the intermediate flange.

Detailed Description

Fig. 1 shows in section the upper part of a torsional vibration damper 1 of a hydrodynamic torque converter (not shown in detail), which can be rotated about a rotational axis d. The input part 2 is connected by means of rivets 5 distributed over the circumference to an output side plate carrier 3 of a converter bridge clutch which is arranged between the housing of the hydrodynamic torque converter and an output hub 4 of the hydrodynamic torque converter. The input portion 2 and the plate carrier 3 are received in a rotatable, centered manner on the output hub 4. The output portion 6 is non-rotatably connected to the output hub 4, e.g. welded thereto. The input part 2 and the output part 6 are designed as disc-shaped parts 7, 8 arranged parallel to each other. The disc-shaped portion 7 is axially fixed and rotatably received by means of an annular rim 9 of the output hub 4 and is centred on the output hub 4. The disk portion 8 is held in a non-rotatable manner on an annular edge 9 on the output hub 4, for example welded to the annular edge.

The intermediate flange 10 is formed by two axially spaced apart lateral portions 12, 13 connected to each other by means of spacer bolts 11. The disk-shaped portions 7, 8 are axially received between the lateral portions 12, 13 of the intermediate flange 10. The lateral portion 12 facing the converter bridge clutch is radially recessed on the inside in order to enable connection of the plate carrier 3 to the input portion 2. The projections 14 emerging from the lateral portions 12 are axially clamped with torsional play in the axially opposite openings 15 and thus limit the angle of rotation between the intermediate flange 10 and the input portion 2.

The lateral parts 12, 13 form a pendulum mass carrier of the centrifugal pendulum 37 received on the central flange 10 and receive the pendulum mass 16, which is composed of, for example, riveted sheet metal disks distributed over the circumference. The pendulum mass 16 is suspended in the centrifugal force field of the torsional vibration damper 1 rotating about the axis of rotation d by means of pendulum bearings (not shown) on the pendulum mass carrier, so that the pendulum mass can oscillate along a predetermined pendulum path. The spacer bolt 11 has a stop bumper 17 to define the swing angle of the swing block 16.

Spring means 18, 19 act between the input portion 2, the intermediate flange 10 and the output portion 6. The spring means 18, 19 are arranged in series, i.e. the spring means 18, 19 effectively arranged between the input part 2 and the intermediate flange 10 and between the intermediate flange 10 and the output part 6 are loaded in series when the input part 2 rotates about the rotation axis d relative to the output part 6 according to the direction of the applied torque.

The spring means 18, 19 are formed by linear helical compression springs 20, 21 distributed over the circumference and arranged on substantially the same diameter.

The thrust washer 22, which is made in particular of plastic and is suspended in a non-rotatable manner in the lateral portion 13, defines the axial play of the intermediate flange 10. The intermediate flange 10 is received and centered with limited torsional play by means of the lateral portion 13 on the output hub 4. For this purpose, radially extending cams 23 distributed over the circumference are provided on the output hub 4, which engage with torsional play in recesses 24 provided circumferentially on the inner circumference of the lateral parts 13 and limit the angle of rotation of the central flange 10 relative to the output part 6 of the torsional vibration damper.

By means of the stops 25, 26 for limiting the angle of rotation by means of the elevations 14 and the openings 15 on the input side and the cams 23 and the recesses 24, the angle of rotation of the intermediate flange 10 relative to the input part 2 or the output part 6 is limited to, for example, ± 15 °, so that blocking positions of the helical compression springs 20, 21 are avoided and damage caused thereby is precluded.

Stops 25, 26 for limiting the angle of rotation of the intermediate flange 10 are provided radially inside the spring devices 18, 19, so that the installation space outside the spring devices 18, 19 can be kept free for dimensioning the pendulum blocks 16, and these can be provided with increased blocks and/or increased pendulum angles with respect to the stops arranged radially outside the spring devices 18, 19 for limiting the angle of rotation of the intermediate flange 10.

The input-side and output-side application of the helical compression springs 20, 21 takes place by means of radially extending application regions 27, 28 which are each located in the center of the cross section of the end faces of the helical compression springs, wherein the application regions 27, 28 of the disk segments 7, 8 each overlap in the application direction of the disk segments 7, 8. At the loading region 28, a lug 29 is provided which extends in the loading direction and engages in the interior of the helical compression springs 20, 21 in order to radially depress the end faces of the helical compression springs 20, 21. In particular against radial deflection of the helical compression spring when its ends are rotated, the disk portion 7 has a projection 30 which extends the helical compression springs 20, 21 in the circumferential direction and partially overlaps in the radial direction.

Fig. 2 shows the torsional vibration damper 1 from fig. 1 in a partial view, with the front lateral section removed and the helical compression springs 20, 21 of the spring devices 18, 19 accommodated alternately in the spring windows 31, 32 on the circumference. The helical compression springs 20, 21 are provided to be loaded in both rotational directions of the intermediate flange 10 by means of the radial walls 33, 34 of the spring windows 31, 32. The radial support of the helical compression springs 20, 21 takes place on the radially outer input side by means of the projections 30 of the disk portion 7 and on the radially inner output side by means of the lugs 29 of the disk portion 8.

Radially outside the coil compression springs 20, 21 in the immediate vicinity, the pendulum mass 16 of the centrifugal pendulum 37 is suspended in a pivotable manner by means of the pendulum bearings 35 on the lateral parts 12 (fig. 1), 13 along a pendulum path specified by the pendulum bearings 35 in the centrifugal force field of the torsional vibration damper 1 rotating about the axis of rotation d. Since the stops 25, 26 (fig. 1) are located radially inside the spring devices 18, 19, the installation space located radially outside the spring devices 18, 19 can be dedicated to the pendulum mass 16 and its pendulum angle requirements. The recess 36 is provided only for the spacer bolt 11. Some of the spacer bolts 11, which are used here to limit the circumferential movement of the pendulum mass 16, have a stop buffer 17.

Fig. 3 shows a detail of the torsional vibration damper 1 in the region of the output hub 4, which has a stop 26 for limiting the angle of rotation between the intermediate flange 10 and the output section 6 (fig. 1). The output hub 4, which is firmly connected to the output part and welded, has three radially extending cams 23 distributed over the circumference, which cams extend with torsional play into recesses 24 provided on the inner circumference of the lateral parts 13 of the intermediate flange 10. The torsional play created between the cams 23 and the recesses 24 is such that the angle of rotation of the intermediate flange relative to the output hub 4 and thus relative to the output portion 6 (fig. 1) is limited within the working range of the helical compression springs 20, 21 (fig. 1) and before reaching their blocking position.

Fig. 4 shows a detail of the torsional vibration damper 1 in the region of the stop 25 between the plate carrier 3 and the lateral portion 12 of the central flange 10. Since the disc-shaped portion 7 of the input portion 2 is riveted to the plate carrier 3 by means of the rivet 5, the stop 25 between the input portion 2 and the intermediate flange 10 is active and limits the torsional play on the input side before the helical compression springs 20, 21 reach the blocking position. For this purpose, projections 14 project axially from the lateral portion 12 of the central flange 10 and are distributed over the circumference and engage with the openings 15 of the plate carrier 3 with torsional play.

Fig. 5 shows a detail of the torsional vibration damper 1 from the perspective of the plate carrier 3, wherein the projections 14 of the lateral portions 12 engage with torsional play in the openings 15 (fig. 1) of the plate carrier 3.

Description of the reference numerals

1 torsional damper 2 input part 3 plate carrier 4 output hub 5 rivet 6 output part 7 disc part 8 disc part 9 annular rim 10 middle flange 11 spacer bolt 12 side part 13 side part 14 protrusion 15 opening 16 pendulum block 17 stop damper 18 spring means 19 spring means 20 helical compression spring 21 helical compression spring 22 stop washer 23 cam 24 recess 25 stop 27 loading area 29 lug 30 protrusion 31 spring window 33 wall 34 pendulum bearing 36 recess 37 pendulum d axis of rotation