CN102537114B - Warp prevention apparatus and torque converter including the same - Google Patents
Warp prevention apparatus and torque converter including the same Download PDFInfo
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- CN102537114B CN102537114B CN201110431698.9A CN201110431698A CN102537114B CN 102537114 B CN102537114 B CN 102537114B CN 201110431698 A CN201110431698 A CN 201110431698A CN 102537114 B CN102537114 B CN 102537114B
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- leaf spring
- torque
- converters
- piston
- driving plate
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- 230000002265 prevention Effects 0.000 title 1
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 230000033001 locomotion Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
The invention relates to a warpage preventing device comprising a first rotational element, a second rotational element, a leaf spring arranged to transmit torque between the first and second rotational elements while being relatively axially movable between the first and second rotational elements, a connecting member fixedly connecting the leaf spring to the second rotational element, wherein the connecting member extends axially through a hole in the first rotational element, wherein a gap is formed between the connecting member and an edge of the hole when the leaf spring is not subjected to an excessively high compressive force; and wherein the connecting member is operatively arranged to close the gap and engage the first member when the spring is subjected to an excessively high compressive force to prevent buckling of the leaf spring and to at least partially transfer the torque directly between the first and second rotational elements.
Description
Technical field
The present invention relates broadly to torque-converters, more particularly relates to set piston position in torque-converters
Leaf spring, and relate more particularly to the equipment of a kind of leaf spring warpage for preventing in torque-converters.
Background technology
Torque-converters is commonly known in the art.Torque-converters usually includes piston, and piston moves axially to connect
Close clutch.Torque-converters can include leaf spring, with by moment of torsion (either directly or indirectly) being somebody's turn to do from torque-converters
It is delivered to piston.Moment of torsion can be delivered on piston by described leaf spring by leaf spring, simultaneously can also warpage with
Piston can be made to move axially relative to converter cover or move relative to the driving plate of leaf spring.Such as one kind
The plate spring device of type, sees the open No.2008/0190723 of United States Patent (USP) (Heck etc.), this patent open with
The mode of reference is herein incorporated.Described leaf spring is generally arranged to so that in the driven of the operation of torque-converters
In pattern, described leaf spring only under tension.Due to described spring e.g. thin board type component, they have good
Good hot strength.
But, when automobile does inertia motion, described force direction so that described leaf spring is by compression stress.?
During inertia motion, generally mean that electromotor in idling, but motor vehicles still motion, including the portion of torque-converters
Part.Compression stress on described leaf spring is the result that the resistance of the electromotor being connected to torque-converters causes.Described pressure
Contracting power causes described leaf spring warpage and becomes the danger of lasting bend or deformation.Described engine drag has
Time be referred to as provide " engine braking ".Substantially, when automobile does inertia motion, described torque-converters and other
Element still rotates, but electromotor is not (or when inertia motion only in certain limit degree), from
And described torque-converters parts generally order about engine rotation, simultaneously electromotor idling rather than with other
Mode operates.The electromotor of many automobiles, the electromotor of such as typical passenger vehicle, seldom make electromotor hinder
Power is large enough to make the great risk of the warpage of leaf spring.But, the electromotor of some automobiles, such as semitrailer
Electromotor, be arranged to when doing inertia motion strongly resist rotation, and provide degree big start mechanism
Dynamic, it is applied in the end opposite of leaf spring as compression stress.As a result, exist when getting used to doing in these motor vehicles
Property motion time leaf spring warpage the most tangible danger.
Summary of the invention
The present invention broadly includes preventing warpage equipment, described in prevent warpage equipment include the first rotation element,
Second rotate element, leaf spring, described leaf spring is fixedly connected to described second rotate element connecting elements,
Wherein, described leaf spring be arranged to described first and second rotate transmit moment of torsion between elements simultaneously can be in institute
Stating and move to axial between the first rotation element and the second rotation element, wherein, described connecting elements extends
The hole in element is rotated through described first, wherein, when described leaf spring is not by too high compression stress,
Gap is formed between the edge in described connecting elements and described hole, and, wherein, described connecting elements can
Operatively it is arranged to, when described spring is by too high compression stress, closes described gap and with described first
Component engages, to prevent described leaf spring warpage and to rotate between element described first and second at least in part
Directly transmit moment of torsion.In one embodiment, described first rotates the driving plate that element is described leaf spring.?
In one embodiment, described second rotation element is the piston for engaging clutch.In one embodiment,
Described connecting elements is braking rivet, and it has for engaging the described first head rotating element, to limit
An axial direction rotates element and second described first and rotates the axially-movable between element.
The present invention the most broadly includes a kind of torque-converters, and it includes above-mentioned preventing warpage equipment.An enforcement
In example, described second rotation element is the piston for engaging clutch.In one embodiment, described plate
Spring is operatively arranged to keep in the open position described piston relative to described clutch.A reality
Executing in example, the moment of torsion that described first rotation element is at least mechanically coupled to described torque-converters input torque is defeated
Enter device.In one embodiment, described first rotation element is the driving plate for described leaf spring, and
Described driving plate connects the lid of described torque-converters, and wherein, described lid connects described moment of torsion input equipment.
In one embodiment, too high compression stress is the result that in described moment of torsion input equipment, resistance produces, simultaneously
Described moment of torsion input equipment idling, resists the rotation of the lid of described torque-converters.In one embodiment, described
Clutch is lock-up clutch, for the vibroshock of torque-converters is mechanically coupled to the lid of torque-converters.
The these and other objects and advantages of present invention the description below according to a preferred embodiment of the invention and root
According to drawings and claims, by will be appreciated that.
Accompanying drawing explanation
Now, referring to the drawings, in the following detailed description of the present invention, it is described more fully with the character of the present invention
And mode of operation, in the accompanying drawings:
Fig. 1 is the sectional view of torque-converters；
Fig. 2 is the front view of the plate spring device for piston；
Fig. 3 is approximately along the sectional view of the plate spring device of 3-3 line cutting in Fig. 2；
Fig. 4 is approximately along the sectional view of the plate spring device of 4-4 line cutting in Fig. 2；
Fig. 5 is the enlarged drawing of the warpage backstop equipment of the plate spring device for Fig. 4.
Detailed description of the invention
When starting, it should be appreciated that the identical reference on different accompanying drawings represents the phase of the present invention
Same or functionally similar structural detail.Although the present invention is to be presently considered to be preferred aspect to retouch
State, but it is to be understood that, it is desirable to the invention of protection is not limited to disclosed aspect.
Furthermore, it is to be understood that the invention is not restricted to special method, material and described amendment with
And the most same modification.It is to be further understood that method used herein above is only used for describing special aspects
Purpose, be not intended to limit protection scope of the present invention, protection scope of the present invention is only by claims
Book limits.
Unless otherwise defined, all technology used herein above and scientific terminology have of the art
The identical meanings that those of ordinary skill is commonly understood by.Although similar or equivalent to those sides as described herein
During any method, equipment or the material of method, equipment or material can be used in the practice of the invention or test,
Now preferred method, equipment and material are only described.
Referring now to accompanying drawing, Fig. 1 shows torque-converters 10.Torque-converters 10 includes covering 12, pump impeller 14, turbine
16, stator 18 and vibroshock 20, vibroshock 20 is for transferring torque to become from electromotor (not shown)
The power shaft of speed device (not shown).Lid 12, pump impeller 14, turbine 16, stator 18 and vibroshock 20 are general
Can use known any mode, illustrated embodiment is only used for task of explanation.
In embodiment shown in figs. 1-5, moment of torsion is delivered to drive plate 22 from electromotor, then, and warp
It is delivered to cover 12 by rivet 24.Described moment of torsion is then delivered to leaf spring via rivet 28 and drives plate 26.Braking
Rivet 30.Braking rivet 30 is arranged on leaf spring and drives between plate 26 and piston 32, but, brake rivet
30 are arranged without for directly transmitting moment of torsion under normal operating conditions between plate 26 and piston 32, because
Leaf spring around braking rivet drives and there are some play or lax in plate.So, braking rivet 30 and plate
26 can be moved relative to a certain extent.Described braking rivet is because of the head of the increase on rivet 30
31 and be restricted relative to plate 26 on side, to set the axial restriction to piston 32, and described work
Plug is transitioned in open position, as will be described in more detail as follows.
Moment of torsion is delivered to piston 32 from plate 26 via leaf spring 36.Specifically, as shown in Figure 4 and Figure 5, institute
State leaf spring be fixed to plate 26 via rivet 38 and be fixed to piston 32 via braking rivet 30.So, moment of torsion
The most directly via braking rivet 30 from driving plate 26 to be delivered to piston 32, but moment of torsion is delivered to riveting from plate 26
Nail 38, to leaf spring 36, to braking rivet 30, is eventually transferred into piston 32.Usually, around described plate
Spring drives the outer peripheral edge of plate to arrange multiple leaf spring.Piston 32 has two axial locations, i.e. open position and closes
Close position, be respectively used to engage clutch 34 or disconnecting clutch 34.That is, the surface 35 of piston 32 with from
Clutch 34 formed engage vibroshock 20 to be locked onto lid 12, or surface 35 from clutch 34 leave with
Clutch is made to depart from.
In showing that piston 32 is in an open position in FIG.Such as make torque-converters each chamber pressurization and/
Or decompression, described piston can move in make position.When compression stress is released or at two axles of piston
On side during equilibrium, such as, promoting slightly due to compression stress and/or by leaf spring, described piston returns to open
Position, as generally show in Fig. 1.In this transient process from make position to open position
In, as because of the warpage of parts or transfer, the piston in the torque-converters of some prior art tends to and torque-converters
Miscellaneous part collision, such as vibroshock.It is too remote in order to prevent piston 32 from moving axially from clutch 34,
With such as collide with vibroshock 20, head 31 be arranged on braking rivet 30 on, with to piston 32 provide braking
Function.That is, rivet 30 is at one end rigidly secured to piston 32, can relative to driving plate 26 at the other end
Mobile.But, the movement between rivet 30 and plate 26 is limited by head 31, and head 31 is used as stop part
To limit rivet 30, and then restriction piston 32 can be remote axially upwardly move towards the side of vibroshock 20
Degree.So, rivet 30 can be set to position stop part, to set the open position to piston 32
Restriction.It should be appreciated that the ability that piston will not engage clutch 34 has been compromised, this is because of riveting
Nail 30 is not fastened to plate 26, and the head 31 of braking rivet 30 does not limit piston on two axial directions
Move axially.
Advantageously, leaf spring 36 can warpage so that described piston moves axially relative to plate 26, also simultaneously
Moment of torsion can be made to be transmitted by spring.Usually, when electromotor is driven, electromotor passes through leaf spring
Transmission moment of torsion, thus, described leaf spring strained in the opposite direction by rivet 30 and 38, draws in described leaf spring
Play pulling force.Such as, as it is shown in figure 5, rivet 30 causes pulling force component F on leaf springt1, and rivet 38 is at plate
Pulling force component F is caused on springt2.Owing to leaf spring is actually thin board type component, it has good hot strength,
Power Ft1And Ft2It is not easy to damage described leaf spring.
But, when engine idle and motor vehicles move, torque-converters rotates the most in the driven direction, but
Electromotor is not so.On the contrary, as previously described, electromotor stops described rotation so that lid 12 is actually
Moment of torsion is communicated back to electromotor.That is, when doing inertia motion, engine idle, is not that electromotor drives
Torque-converters, but electromotor is driven by converter cover.Again, the frictional force in electromotor resists this rotation together
Time engine idle.As a result, rivet 30 and 38 will mutually exert on active force on leaf spring.I.e. rivet 30 exists
Directed force F is applied towards rivet 38 on leaf springc1, meanwhile, rivet 38 on the direction towards rivet 30 at plate
Contrary power F is applied on springc1.If moment of torsion, Jin Erli, sufficiently large, then these compression stresses can exceed and face
Dividing value, causes leaf spring warpage, and this typically causes plate-shaped spring bends, makes rivet 38 and 30 be drawn closer together one
Rise.Because spring shows good elastic performance, i.e. after removing the power applied, they return them
Original shape, thus mainly use spring.But, when compression stress is excessive, warpage will cause spring to bend
Clothes, and then carry out plastic deformation.
Braking rivet 30 there also is provided leaf spring and drives plate 26 to prevent leaf spring 36 warpage.As it has been described above, in riveting
There are some play or lax between nail 30 and driving plate 26.Specifically, as shown in Figure 4, and Fig. 5
Shown in enlarged drawing, gap 40 is arranged on the main body of rivet 30 and drives between plate 26.Specifically, rivet 30
Extend axially through the hole 42 driven in plate 26.Such as by driving the diameter in the hole 42 in plate 26 more than riveting
Nail 30, or by making hole 42 become oval or certain other shape, it is possible to make gap 40 be formed.Gap 40
It is positioned to so that if leaf spring 36 starts warpage, rivet 30 is towards power Fc1Direction on to drive plate 26
Transfer, and close described gap.When leaf spring 36 enough deforms, gap 40 will thoroughly close, riveting
The nail 30 edge in hole 42 engages plate 26.General gap-closing, rivet 30 firmly pressing plate 26,
Rivet 30 is by stoping leaf spring warpage as stop part further against the edge in the hole driven in plate 26.
It addition, will the most directly be transmitted by rivet 30 to the moment of torsion driving plate 26 from piston 32.The most just
It is to say, drives plate 26 and rivet 30 for providing hard backstop to limit compression or the warpage of leaf spring experience.Cause
This, leaf spring is merely able to warpage and is substantially equal to the distance in gap 40.
Leaf spring is appropriately arranged with so that there is not the hard mechanical connection being attached to piston, such as by rivet, this
It is because this connection and can cause creak sound or other performance issues.The most just build this most mechanical
Connection, i.e. prevents the warpage of leaf spring, and performance does not reduces, and significantly improves the service life of system, particularly
The service life of leaf spring.So, gap 40 and/or hole 42 are sized to change, to realize in leaf spring
The amount of warpage allowed and riveted joint drive the balance between the frequent degree of plate.
It should be appreciated that when rivet is disclosed as preferably connecting what the various parts of torque-converters linked together
During connection device, it is possible to replace rivet to use other connecting elements.Such as, bolt can be any to be similar to
The mode of rivet uses, and bolt includes the head of the braking function for being similar to head 31.
Thus, it is possible to see and effectively achieve the purpose of the present invention, although modifications of the present invention and change are right
For those of ordinary skill in the art be easy and it will be evident that these amendment be intended to fall the present invention spirit and
In scope of the claimed.It is to be further understood that explanation above for illustrating the present invention, it is not considered that
It is to limit the present invention.Therefore, under conditions of without departing from the spirit and scope of the present invention, the present invention's
Other embodiments are also possible.
Claims (12)
1. prevent a warpage equipment, including:
Lid；
First rotates element, and this first rotates element and have opposite first and second, this second
Radially stretching in this outside of first, described first rotates first and the direct anti-rotating of described lid of element
Connection；
Second rotates element；
Leaf spring, its be arranged for described first and second rotate transmit moment of torsion between elements simultaneously can be
Described first rotation element and second rotates element and moves to axial；
Connecting elements, its be connected to described first rotate second of element on, and by described leaf spring regularly
Being connected to described second and rotate element, wherein, described connecting elements extends axially through described first and rotates
Hole in second of element, wherein, when described leaf spring is not by too high compression stress, in described company
Gap is formed between the edge in connection member and described hole；And
Wherein, described connecting elements is operatively arranged to when described leaf spring is by too high compression stress make institute
State gap-closing and engage, to prevent described leaf spring warpage and by described moment of torsion with described first rotation element
Directly rotate described first and second and transmit at least in part between element.
Equipment the most according to claim 1, it is characterised in that
Described first rotation element is the driving plate for described leaf spring.
Equipment the most according to claim 1, it is characterised in that
Described second rotation element is the piston for engaging clutch.
Equipment the most according to claim 1, it is characterised in that
Described connecting elements is braking rivet, and it has for engaging the described first head rotating element, with
It is limited on an axial direction and rotates, described first, the axial shifting that element and described second rotates between element
Dynamic.
5. the torque-converters preventing warpage equipment included described in claim 1.
Torque-converters the most according to claim 5, it is characterised in that
Described second rotation element is the piston for engaging clutch.
Torque-converters the most according to claim 6, it is characterised in that
Described leaf spring is operatively arranged to relative to described clutch, described piston is maintained at open position
In.
Torque-converters the most according to claim 7, it is characterised in that
Described first rotates element is at least mechanically coupled to input dress to the moment of torsion of described torque-converters input torque
Put.
Torque-converters the most according to claim 8, it is characterised in that
Described first rotate element be the driving plate for described leaf spring, and described driving plate be connected to for
The lid of described torque-converters, and wherein, described lid is connected to described moment of torsion input equipment.
Torque-converters the most according to claim 9, it is characterised in that
Described too high compression stress is the result of the resistance in described moment of torsion input equipment, and the most described moment of torsion is defeated
Enter device and be in idling, resist the rotation of the lid of described torque-converters.
11. torque-converters according to claim 6, it is characterised in that
Described clutch is lock-up clutch, described for being mechanically coupled to by the vibroshock of described torque-converters
The lid of torque-converters.
12. 1 kinds for torque-converters prevent warpage equipment, including:
Lid；
Driving plate, it is contained in described torque-converters, and this driving plate has opposite first and second,
This second radial direction is stretched in this outside of first, first of described driving plate and the direct anti-rotation of described lid
Dynamic connection；
Piston, it is contained in described torque-converters；
Leaf spring, it is arranged to transmit moment of torsion between described driving plate and piston, can make described simultaneously
Move to axial between piston and described driving plate；
Braking rivet, it is connected on second of described driving plate, and is fixedly connected to by described leaf spring
Described piston, wherein, described braking rivet extends axially through the hole in second of described driving plate,
Wherein when described leaf spring is not by too high compression stress, shape between the edge in described rivet and described hole
Become gap, wherein, described braking rivet include head, described head be operatively arranged to engage described in drive
The side of dynamic plate, to limit described piston moving axially on an axial direction；And
Wherein, described braking rivet is operatively arranged to the Guan Bi institute when described leaf spring is by crossing high compression forces
State gap and engage with described driving plate, to prevent described leaf spring warpage and directly in described driving plate and institute
State and between piston, transmit described moment of torsion at least in part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US42372210P | 2010-12-16 | 2010-12-16 | |
| US61/423,722 | 2010-12-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537114A CN102537114A (en) | 2012-07-04 |
| CN102537114B true CN102537114B (en) | 2016-12-14 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353444A (en) * | 1979-04-02 | 1982-10-12 | Societe Anonyme Francaise Du Ferodo | Transmission with hydraulic coupling device and locking clutch suitable for a motor vehicle |
| US4577740A (en) * | 1982-06-21 | 1986-03-25 | Valeo | Clutch cover assembly |
| US4928486A (en) * | 1987-07-29 | 1990-05-29 | Valeo | Variable-force clamping mechanism between torque-variation damping flywheel and torque converter |
| US6065577A (en) * | 1997-09-23 | 2000-05-23 | Valeo | Lock-up clutch for a hydraulic couping apparatus, especially for a motor vehicle |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353444A (en) * | 1979-04-02 | 1982-10-12 | Societe Anonyme Francaise Du Ferodo | Transmission with hydraulic coupling device and locking clutch suitable for a motor vehicle |
| US4577740A (en) * | 1982-06-21 | 1986-03-25 | Valeo | Clutch cover assembly |
| US4928486A (en) * | 1987-07-29 | 1990-05-29 | Valeo | Variable-force clamping mechanism between torque-variation damping flywheel and torque converter |
| US6065577A (en) * | 1997-09-23 | 2000-05-23 | Valeo | Lock-up clutch for a hydraulic couping apparatus, especially for a motor vehicle |
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| CB02 | Change of applicant information |
Address after: German Herzogenaurach Applicant after: SCHAEFFLER TECHNOLOGIES AG & CO.KG Address before: German Herzogenaurach Applicant before: Schaeffler Technologies GmbH |
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| GR01 | Patent grant |