EP2002150A1

EP2002150A1 - One-way link coupling with vibration damping

Info

Publication number: EP2002150A1
Application number: EP07711209A
Authority: EP
Inventors: William Brees
Original assignee: LuK Lamellen und Kupplungsbau Beteiligungs KG; LuK Lamellen und Kupplungsbau GmbH
Current assignee: Schaeffler Buehl Verwaltungs GmbH; LuK Lamellen und Kupplungsbau GmbH
Priority date: 2006-03-24
Filing date: 2007-02-23
Publication date: 2008-12-17
Also published as: KR20080104022A; CN101449084A; JP2009531607A; WO2007110021A1; DE112007000498A5; CN101427055A; US7896144B2; US20070220876A1

Abstract

The invention relates to a component comprising a stator (120) and a one-way coupling (100), which comprises a segment of a stator, a one-way coupling which is connected to the segment and at least one elastically deformable element (106) which is connected to the segment and to the coupling, which is arranged in such a manner that it attenuates the transmission of torque from the stator to the coupling. According to some aspects, the coupling comprises a first disk (108) and the deformable element is connected to the segment and to the disk. The segment presses the deformable element against the first disk which is arranged such that it is offset in rotation as a reaction to the pressure. The segment and the first disk are arranged in such a manner that they engage with each other in the direction of rotation. The first disk and a second disk (154) which is connected to the coupling hub engage with each other in the direction of rotation as a reaction to the pressure, and the segment and the first disk are arranged such that they engage with each other in the direction of rotation after the first and second disk are engaged.

Description

Single-point coupling with vibration damping

FIELD OF THE INVENTION

The invention relates to improvements in a device for transmitting power between a rotary drive unit (for example the motor of a motor vehicle) and a rotationally driven unit (for example the automatic transmission in the motor vehicle). In particular, the invention relates to a stator and a one-way clutch assembly with vibration damping in a stator. The assembly provides damping means between the stator and the clutch to minimize jerk, noise, and vibration that occurs in the stator when transitioning from freewheeling mode to engaged mode (clutching mode).

BACKGROUND OF THE INVENTION

One-way clutches are used in stators to separate the rotational movement of the blades of the stator from the rotational motion of the shaft of the stator during a freewheeling mode and to lock together the rotational motion of the blades and the stator shaft during a locked mode. During the transition from freewheel mode to clutch mode, the stator transitions from free rotation (freewheel) to torque transmission. To engage the clutch, various components of the clutch are brought together. The jerk associated with the touch can lead to unwanted noise and vibration. The strength of the jerk, and thus the amount of noise and vibration, depends on the play of movement of the components during the transition. Known is the incorporation of counteracting components in the clutch to reduce the game. These components require high accuracy for them to work properly. Unfortunately, this degree of accuracy may be higher than or even incompatible with the accuracy required for the remaining components of the coupling. For example, stamped components in a clutch can significantly reduce the cost and complexity of the clutch. However, it can be difficult or even be impossible to include the above-mentioned counteracting components using stamped components.

Thus, there has long been a need for a means for reducing noise and vibration in a one-way clutch with a stator while using low cost methods, arrangements, and components.

BRIEF SUMMARY OF THE INVENTION

The present invention generally includes an assembly of a stator and a one-way clutch having a segment, a one-way clutch arranged to couple to the segment, and at least one elastically deformable member connected to the segment and the clutch arranged to damp torque transfer from the stator to the clutch is. In some aspects, the clutch includes a first disc, and the at least one elastically deformable member is connected to the segment and the first disc. The segment is rotatable to urge the at least one elastically deformable element against the first disc. The at least one elastically deformable element may be deformed in response to the pressing. The first disc is arranged to be rotated in response to the pressing. The segment and the first disc are arranged so that they snap into each other in the direction of rotation.

In some aspects, the segment is arranged to rotate at a first speed during pressing, and the first disk is arranged to rotate at a second speed during pressing, the first speed being greater than the second speed. In some aspects, the at least one elastically deformable element is arranged to be in a substantially constant state of deformation during engagement. The clutch includes a hub to which a second pulley is connected, the first and second pulleys are operatively arranged to lock into engagement in response to the rotational bias, and the segment and first pulley are arranged to engage each other engage in the direction of rotation after latching the first and second discs together. In some aspects, the first disk may be displaced in the axial direction. In some aspects, the first disc includes at least a first protrusion, the second disc includes at least one first receiving structure, and the at least one first protrusion and the at least one first receiving structure are arranged to snap into one another. In some aspects, the second disc includes at least one second protrusion, the first disc includes at least one second receiving structure, and the at least one second protrusion and the at least one second receiving structure are arranged to snap into one another.

In some aspects, the segment is arranged to transmit torque to the at least one elastically deformable member, and the at least one elastically deformable member is arranged to transmit at least a portion of the torque to the first disc. In some aspects, the at least one elastically deformable element is arranged to transmit substantially all of the torque to the first disk. In some aspects, the segment supports the at least one elastically deformable element, or the first disc supports the at least one elastically deformable element. In some aspects, the segment and the first and second disks are formed by stamping. In some aspects, the at least one elastically deformable element includes a component belonging to a group consisting of a spring and a blanket cylinder.

Further, the present invention generally includes an assembly of a stator and a one-way clutch that includes a segment of a stator, a portion of a one-way clutch, and at least one elastically deformable member. The part is connected to the segment. The element is connected to the segment and the part is arranged to dampen the vibrations when engaging the rotational movement of the stator and the coupling.

Further, the present invention generally includes an assembly of a stator and a one-way clutch, the assembly including a segment for a stator, a first part of a one-way clutch, a second part of the one-way clutch, and at least one elastically deformable member connected to the segment and first part is connected. The second part is connected to a hub of the stator. The segment is rotatable to push the at least one elastically deformable element against the first part, and the at least one elastically deformable element is so - A -

arranged to deform in response to the pressing. The first part is arranged to be rotated in response to the pressing, the first and second parts are functionally arranged to snap in response to the pressing in the direction of rotation, and the segment and the first disk are so arranged to snap in the direction of rotation after the engagement of the first and the second disc. The at least one elastically deformable element is arranged so that it absorbs a part of the energy associated with the engagement of the first and the second disc.

A general object of the present invention is to provide a one-way clutch in a stator which generates as little vibration and noise as possible when shifting into a locked mode.

Another object of the present invention is to provide a one-way clutch in a stator with damping between components used during a locked mode of torque transmission.

Yet another object of the present invention is to use stamped parts in a stator and a one-way clutch to provide an assembly that produces as little vibration and noise as possible when changing the stator to a locked mode.

These and other objects and advantages of the present invention will become apparent from the following description of the preferred embodiments of the invention and from the accompanying drawings and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following, the nature and mode of operation of the present invention will be described in detail in the course of the detailed description of the invention in conjunction with the accompanying figures, wherein:

Fig. 1 is an exploded front view of an assembly including a stator and a one-way clutch according to the present invention; Fig. 2 is an exploded view of the assembly shown in Fig. 1 with a stator and a one-way clutch;

Fig. 3 is a front perspective view of a stator in an assembly according to the present invention of a stator and a one-way clutch;

Fig. 4 is a rear perspective view of the stator shown in Fig. 3 and the assembly according to the present invention of a stator and a one-way clutch;

Fig. 5 is a front perspective view of the housing of the assembly of the present invention shown in Fig. 1 with a stator and a one-way clutch;

Fig. 6 is a front view of the housing shown in Fig. 5;

Fig. 7 is a rear view of the stator in Fig. 3;

Fig. 8 is a cross-sectional view of the stator shown in Fig. 3 taken along section line 8-8 in Fig. 7;

9 is a rear perspective view of a disk in the assembly of the present invention shown in FIG. 1 with a stator and a one-way clutch;

Fig. 10 is a front perspective view of the disk shown in Fig. 9;

11 is a cross-sectional view of an assembly according to the present invention having a stator and a one-way clutch showing the clutch in a coasting mode; and

FIG. 12 is a partial cross-sectional view of the assembly shown in FIG. 11 showing the clutch in a latched mode. FIG. DETAILED DESCRIPTION OF THE INVENTION

It should be understood in advance that like reference numerals in different drawing views designate identical or functionally similar structural elements of the invention. Although the present invention is described with reference to the aspects presently considered to be preferred, it should be understood that the claimed invention is not limited to the aspects set forth.

It is also to be understood that the present invention is not limited to particular methods, materials, and modifications described, and to that extent, of course, may vary. It is further understood that the terms used herein are for the purpose of describing particular aspects only and are not to be construed as limiting the scope of the present invention, which is limited only by the appended claims.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood to one of ordinary skill in the art to which this invention belongs. Although any methods, devices, or materials similar or equivalent to those described herein may be used to make or test the invention, the preferred methods, devices, and materials are described below.

FIG. 1 is an exploded front view of an assembly 100 having a stator and a one-way clutch.

FIG. 2 is an exploded rear view of the assembly 100 including a stator and a one-way clutch. FIG. The following description can be seen in conjunction with FIGS. 1 and 2. The term front refers to the engine-facing side when a torque converter housing the stator is installed in a vehicle. The term rear refers to the gearbox in the vehicle side facing. It should be understood that these terms are relative and the above meanings can be reversed. Generally, an assembly according to the present invention comprising a stator and a one-way clutch includes a portion or segment of a stator and a portion of a one-way clutch that are interconnected by at least one elastically deformable member. For example, the Assembly 100 a one-way clutch 102, a housing or a disc 104 (part of a stator, not shown, in which the clutch is housed) and at least one elastically deformable element 106. The clutch 102 is arranged so that in the manner described below with the Stator is connected. The deformable elements are connected to the stator, in particular to the housing 104, and the coupling, in particular the disc 108, and arranged so as to dampen the transmission of torque or energy from the stator to the coupling. In particular, the elements are arranged to damp vibrations in the transition of the stator from the freewheel mode to the locked mode. In other words, the elements absorb portions of the torque or energy that is naturally associated with switching to a locked mode and with the contact between the stator and the clutch. Furthermore, the elements reduce the relative velocity in the movement of the stator and the coupling parts during the locked mode.

Elements 106 may be any of those known in the art, including but not limited to springs and cylinders made from compressible materials such as rubber. The elements 106 in FIGS. 1 and 2 are springs. It should be understood that the present invention is not limited to the number, size, shape or arrangement of the elements 106 shown and that other numbers, sizes, shapes or arrangements of the elements 106 are included within the spirit and scope of the claimed invention.

3 is a front perspective view of the stator 120 with the assembly 100.

4 is a rear perspective view of the stator 120 with the assembly 100.

5 is a front perspective view of the disc 104 in the stator 120th

6 is a front view of the disc 104th

The following description will be seen in conjunction with FIGS. 1-6. The elements 106 are connected to the housing 104 and the disc 108, which is part of the coupling 102. The elements 106 are retained in openings 110 of the disc 108. The ends 122 of the elements abut the ends 124 of the openings and the ends 126 of the elements abut a tongue or extension 128 of the disk 108. It It should be understood that the connection of elements 106 to the stator and the coupling is not limited to the arrangement shown. According to some aspects (not shown), the elements 106 are held in the disk 108, for example.

FIG. 7 is a rear view of the stator 120. FIG.

Fig. 8 is a cross-sectional view of the stator 120 taken along section line 8-8 in Fig. 7. The following description will be seen in conjunction with Figs. 1-8. A hub 144 is non-rotatably connected to a shaft (not shown) for the stator 120. Extensions 156 of the disc 108 are inserted in the axial direction through openings 158 in the housing 104. The width 160 of the extensions 156 is smaller than the width 162 of the openings 158, so that the disc 108 can move in the direction of rotation with respect to the housing 104 when the extensions are stuck in the openings 158. Extensions 128 protrude in the axial direction through openings 164 in the disc 104.

In order for the stator 120 to be able to move in a predetermined direction, the clutch is arranged to operate in a latched mode, with rotation in the direction 142 occurring, for example, when the stator is operating in a latched mode. Once the stator transitions to latched mode, it begins to receive torque and housing 104 begins to rotate in direction 142. The stator and the coupling are connected in the direction of rotation by means of tongues 128 and elements 106. For example, rotation of the disc 104 in the direction 142 causes the disc to push the member 106 against the disc 108, particularly against the tongue 128. In some aspects, the disc 108 is arranged and arranged such that the inertia of the disc in freewheeling mode causes at least partial deformation of the member when pressed against the disc 108. For example, when the ends 124 of the aperture press against the springs and the inertia of the disc 108 opposes the movement of the ends 126, compression of the member commences. In some aspects, the resistance of element 106 is about 5 N / m.

As the elements 106 are further elastically deformed or compressed (pushed through the housing 104 in direction 142), the torque or energy from the housing 104 is partially transmitted to the disk 108 by the elements 106, and the disks 108 begin to move in response Pressing in direction 142 to turn. In other words, as the elements 106 are compressed, the housing 104 rotates at a first speed and the disc 108 at a second speed, the first speed being greater than the second speed.

The latching mechanism in the coupling 102, such as the arrangement of the disc 108 and hub 144, may be formed by any means known in the art. In some aspects, at least portions of an axial engagement and disengagement clutch mechanism for a torque converter such as disclosed in commonly assigned U.S. Patent Application Serial No. 11 / 480,815 entitled "Stator Having to Axially Engaging and Disengaging One-Way Clutch Mechanism for a Torque Converter "by Brees et al., Filed July 3, 2006. The detent mechanism in Figures 1-8 includes protrusions 166 on the disc 108 and receiving structures in the hub 144. In some aspects, the protrusions wedge-shaped tabs and the receiving structures are apertures 152. According to some aspects (not shown), the receiving structures are recesses 16. A spring 170 presses against the disc 104 to axially urge the disc 108 against the hub 144. Thus, the disc 108 can The axial mobility of the disc 108 is determined by the Zusammenw irken the extensions 156 in the openings 158 allows.

As the stator 120 rotates in direction 174 (freewheel), the wedge-shaped lobes slide over the hub 144, for example due to the wedge-shaped rise of the lobes, without locking into the openings. As the stator 120 rotates in the direction 142 (latched mode), the tabs engage the openings and lock the disc 108 and hub 144 in the direction of rotation.

9 is a rear perspective view of the disc 108 in the coupling 102.

FIG. 10 is a front perspective view of the disc 108 in the coupling 102. The following description will be seen in conjunction with FIGS. 1-10. As previously described, in the initial phase of the transition from freewheel mode to locked mode, disk 104 presses members 106 against tabs 128. Once the inertia of disk 108 has been overcome by the torque transmitted via elements 106 from housing 104, the disk rotates Disc 108 in the direction 142 until the projections 166 slide into the openings 152 and with these in Direction of rotation are locked. The advantage is that due to the relatively low inertia of the disk in the freewheeling mode, only a relatively small amount of energy has to be transferred from the elements 106 to the disk 108 to couple the disk 108 to the hub 144. Consequently, it comes when snapping the discs only to a small extent shock, vibration and noise.

The disk 104 and members 106 continue to rotate in the direction 142, but the disk 108 is now locked in the direction of rotation with the hub 144 which is non-rotatably connected to the stator shaft. That is, the disk 108 can not rotate in the direction 142. As a result, the elements are compressed until the edges 180 of the tongues 156 contact the edges 182 of the openings 158 in the housing 104. At this time, the housing 104 and the stator 120 are locked by the connection of the disc 108 with the hub in the direction of rotation with the stator shaft. It is advantageous that the collision of the edges 180 and 182 is damped by the compression of the elements 106, so that the vibrations and the noises during collision are greatly reduced.

During the latched mode, the elements 106 are substantially in a constant state of deformation. That is, the elements are not further compressed. In FIGS. 1 to 10, the constant state of deformation is effected by the direct contact between the edges 180 and 182. According to some aspects (not shown) and the following description, the constant deformation is due to the elements being fully compressed or in an equilibrium state in which the resistance of the springs is greater than that of the part of the stator connected to the coupling is the torque transmitted in the direction of the latched mode.

The discs 104 and 108 and the hub 144 may be formed by any means known in the art. In some aspects, the discs and the hub are stamped. In some aspects, the flange 154 is a separate member that is connected to the segment 184 by any means known in the art. In some aspects, the flange 154 is stamped.

The housing 104 may be configured by any means known in the art for connecting to the remainder of the stator 120. For example, the Projections 186 are designed so that they form a connection with the ring 188 of the stator. According to some aspects (not shown), the housing 104 is an integral part of the stator, as described, for example, in commonly assigned U.S. Patent Application Serial No. 60 / 785,790 entitled "Stator and One-Way Clutch Assembly for a Torque Converter of Hemphill et al., filed the same day as the present invention.

It should be understood that the present invention is not limited to the arrangements shown in the figures. According to some aspects (not shown), elastically deformable elements are connected to a component of a stator and to a rotating disk in a one-way clutch. The component and the disk may be similar to the housing 104 and the disk 108, respectively. Rather than allowing direct contact between the component and the disc in latched mode, as described above with reference to edges 180 and 182, the component and disc remain separated by the deformable elements. For example, as described above for discs 108 and hub 144, during the initial phase of the transition from freewheel mode to locked mode, the component pushes the members against the disc, the disc rotates and eventually locks. As soon as the disk meets the resistance of the stator shaft, the elements are compressed until they reach an equilibrium point or are completely compressed between the component and the disk. At this time, the elements are substantially or functionally rigid, and the component and the disc are locked together in the direction of rotation. At the point of equilibrium, the force of the elements is greater than the torque transmitted by the component, and the elements are only partially compressed. It is advantageous that in this arrangement, the collision between the component and the disc as well as vibrations and noises associated with such a collision omitted. When the force of the elements is less than the torque transmitted by the component, the elements are fully compressed. It is advantageous that the collision is damped by the compression of the elements and in this way the vibrations and the noises when colliding are greatly reduced. That is, the elements reduce the speed difference between the component and the disk. 11 is a cross-sectional view of a one-way clutch assembly according to the present invention showing the clutch in a coasting mode.

FIG. 12 is a partial cross-sectional view of the assembly shown in FIG. 11 showing the clutch in a latched mode. FIG. The following description will be seen in conjunction with FIGS. 11 and 12. Figures 11 and 12 illustrate another aspect of the present invention. The assembly 200 with a stator and a one-way clutch includes a disk 204 which is connected to a stator, parts of which are shown. The one-way clutch 208 includes discs 210 and 212. The disc 212 is connected to a hub 214. In some aspects, the disc 212 is an integral part of the hub 214. An elastically deformable member 216, in some aspects a spring, is retained in the disc 204 and abuts the discs 204 and 210, particularly the extension 218 of the disc 210. The assembly 200 is not limited to a particular number, arrangement or type of the element 216. In some aspects, element 216 is a cylinder made of a compressible material such as rubber.

The operation of assembly 200 is similar to that described above for assembly 100 in FIGS. 1-10. For example, rotation of the disk 204 in the latched mode direction causes the disk 204 to push the member 216 against the disk 210. In FIGS. 11 and 12, this direction lies outside the plane of the drawing. In particular, the elements impact the extensions 218 of the disc 210 and cause the discs 210 and 212 to lock together in the direction of rotation. In some aspects, wedge-shaped tabs 220 on the disc 210 engage apertures 222 in the disc 212 to effect latching. As described above, the relatively low inertia of the disk 210 and the damping action of the member 216 reduce the shocks and vibrations during snapping. As the disk 210 continues to rotate, the member 216 continues to be compressed until the segment 224 of the disk 210 comes into contact with the disk 204 as described above for the edges 108 and 182 in Figures 1-10 has been. By the damping effect of an elastically deformable element, for example of the element 216, according to the above description, the shocks and vibrations associated with this contact are largely reduced. Thus, it will be appreciated that the objects of the present invention will be effectively attained, although those skilled in the art may conceive of modifications and variations of the invention which are within the spirit and scope of the claimed invention. It is further understood that the above description is only illustrative of the present invention and is not intended to be limiting. Therefore, other embodiments of the present invention are possible without departing from the spirit and scope of the present invention.

Claims

claims

An assembly comprising a stator and a one-way clutch, the assembly comprising:

a segment of a stator;

a one-way clutch connected to the segment; and

at least one elastically deformable element connected to the segment and the clutch, which is arranged so that the transmission of torque from the stator to the clutch is damped.

2. An assembly according to claim 1, wherein the clutch further comprises a first disc and the at least one elastically deformable element is connected to the segment and the first disc.

3. Assembly according to claim 2, wherein the segment is rotatable to press the at least one elastically deformable element against the first disc.

4. Assembly according to claim 3, wherein the at least one elastically deformable element can be deformed in response to the pressing.

5. An assembly according to claim 3, wherein the first disc is arranged to be rotated in response to the pressing.

6. The assembly of claim 5, wherein the segment is arranged to rotate at a first speed during pressing, and the first disk is arranged to rotate at a second speed during pressing, the first one Speed is greater than the second speed.

7. An assembly according to claim 3, wherein the segment and the first disc are arranged so that they engage in rotation in one another.

8. An assembly according to claim 7, wherein the at least one elastically deformable element is arranged so that it is in a substantially constant state of deformation when the segment and the first disc are engaged with each other.

9. The assembly of claim 7, wherein the clutch further comprises a hub and a hub connected to the second disc, wherein the first and the second disc are functionally arranged so that they engage in response to the pressing in the rotational direction into each other, and wherein the segment and the first disc are arranged so that they engage in one another in the rotational direction after the engagement of the first and second discs.

10. Assembly according to claim 9, wherein the first disc can be moved in the axial direction.

11. An assembly according to claim 9, wherein the first disc at least a first projection and the second disc comprises at least one first receiving structure and the at least one first projection and the at least one first receiving structure are arranged so that they lock into one another.

12. An assembly according to claim 9, wherein the second disc comprises at least a second projection and the first disc at least one second receiving structure and the at least one second projection and the at least one second receiving structure are arranged so that they engage in one another.

13. An assembly according to claim 9, wherein the second disc is formed by punching.

14. The assembly of claim 2, wherein the segment is arranged to transmit torque to the at least one elastically deformable member, and wherein the at least one elastically deformable member is arranged to transmit at least a portion of the torque to the first Disc transfers.

15. The assembly of claim 14, wherein the at least one elastically deformable element is arranged to transmit substantially all of the torque to the first disk.

16. An assembly according to claim 2, wherein the segment supports the at least one elastically deformable element.

17. Assembly according to claim 2, wherein the first disc holds the at least one elastically deformable element.

18. An assembly according to claim 2, wherein the segment and the first disc are formed by punching.

The assembly of claim 1, wherein the at least one elastically deformable element further comprises a component belonging to a group consisting of a spring and a blanket cylinder.

20. An assembly comprising a stator and a one-way clutch, the assembly comprising:

a segment of a stator;

a part of a one-way clutch, the part being connected to the segment; and

at least one elastically deformable element connected to the segment and the part, which is arranged so as to damp vibrations during the engagement of the stator and the coupling in the direction of rotation.

21. An assembly comprising a stator and a one-way clutch in a stator, comprising:

a segment for a stator;

a first part of a one-way clutch; a second part of the one-way clutch, the second part being connected to a hub for the stator; and

at least one elastically deformable element connected to the segment and the first part, the segment being rotatable to press the at least one elastically deformable element against the first part, wherein the at least one elastically deformable element is arranged to act in response to deforming the pressing, wherein the first part is arranged to be rotated in response to the pressing, the first and second parts being operatively arranged to snap together in response to the pressing in the direction of rotation; Segment and the first disc are arranged so that they engage in one another after the engagement of the first and second disc in the rotational direction, and wherein the at least one elastically deformable element is arranged so that a portion of the energy when locking the first and second disc into each other absorbed.