CN112196912B - Pressure tank for operating the friction clutch - Google Patents
Pressure tank for operating the friction clutch Download PDFInfo
- Publication number
- CN112196912B CN112196912B CN202010651095.9A CN202010651095A CN112196912B CN 112196912 B CN112196912 B CN 112196912B CN 202010651095 A CN202010651095 A CN 202010651095A CN 112196912 B CN112196912 B CN 112196912B
- Authority
- CN
- China
- Prior art keywords
- friction clutch
- pressure
- clutch
- return spring
- friction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005540 biological transmission Effects 0.000 claims description 18
- 230000009977 dual effect Effects 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 6
- 238000005452 bending Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
- F16D13/71—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members in which the clutching pressure is produced by springs only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/58—Details
- F16D13/70—Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D13/00—Friction clutches
- F16D13/22—Friction clutches with axially-movable clutching members
- F16D13/38—Friction clutches with axially-movable clutching members with flat clutching surfaces, e.g. discs
- F16D13/52—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member
- F16D13/54—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member
- F16D13/56—Clutches with multiple lamellae ; Clutches in which three or more axially moveable members are fixed alternately to the shafts to be coupled and are pressed from one side towards an axially-located member with means for increasing the effective force between the actuating sleeve or equivalent member and the pressure member in which the clutching pressure is produced by springs only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D21/00—Systems comprising a plurality of actuated clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D25/082—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member the line of action of the fluid-actuated members co-inciding with the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/10—Clutch systems with a plurality of fluid-actuated clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D21/00—Systems comprising a plurality of actuated clutches
- F16D21/02—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways
- F16D21/06—Systems comprising a plurality of actuated clutches for interconnecting three or more shafts or other transmission members in different ways at least two driving shafts or two driven shafts being concentric
- F16D2021/0661—Hydraulically actuated multiple lamellae clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/14—Clutches which are normally open, i.e. not engaged in released state
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
压力罐(16)用于操作摩擦离合器(12、14)，设置有一个力引入元件(22)，其用于引入操作系统所生成沿轴向方向对准的操作力，一个用于固定所述摩擦离合器(12、14)压紧板(32)的压紧元件(30)以及一个用于将所述压紧元件(30)移动至远离所述压紧板(32)的初始位置中的复位弹簧(18)，其中，所述复位弹簧(18)与所述力引入元件(22)及压紧元件(30)被设计成一体。通过将所述复位弹簧(18)一体设计在所述压力罐(16)中可以减小构件数量和安装花费，由此实现所述低制造成本的摩擦离合器(12、14)。
A pressure tank (16) is used to operate a friction clutch (12, 14), and is provided with a force introduction element (22) for introducing an operating force generated by an operating system and aligned in an axial direction, a pressure element (30) for fixing a pressure plate (32) of the friction clutch (12, 14), and a return spring (18) for moving the pressure element (30) to an initial position away from the pressure plate (32), wherein the return spring (18) is designed as a whole with the force introduction element (22) and the pressure element (30). By designing the return spring (18) as a whole in the pressure tank (16), the number of components and the installation cost can be reduced, thereby realizing the friction clutch (12, 14) with low manufacturing cost.
Description
Technical Field
The invention relates to a pressure tank, by means of which a friction clutch can be operated directly, i.e. without a lever gear ratio, by means of an operating system.
Background
The known dual clutch 10 shown in fig. 1 has a first friction clutch 12 and a second friction clutch 14, which are each designed as a diaphragm clutch. For actuating the respective friction clutch 12, 14, a pressure tank 16 is provided which can be moved axially by the actuating system and which can be moved against the spring force of a separate restoring spring 18 in order to close the associated friction clutch 12, 14. In order to provide a restoring force when the assigned respective friction clutch 12, 14 is closed, a restoring spring 18, which is designed as a belleville spring, is compressed between the axially fixed support washer 20 and the pressure tank 18.
There is always a need to reduce the manufacturing costs of friction clutches.
Disclosure of Invention
The object of the invention is to indicate a measure by which a friction clutch can be produced at low cost.
According to the invention, the object is achieved by a pressure tank having the features of claim 1. Advantageous embodiments of the invention are given in the dependent claims and in the following description, which can each show the inventive idea alone or in combination.
According to the invention, the pressure tank for actuating the friction clutch is provided with a force introduction element for introducing an actuating force generated by the actuating system and aligned in the axial direction, a pressing element for fixing the pressure plate of the friction clutch and a restoring spring for moving the pressing element into an initial position remote from the pressure plate, wherein the restoring spring is embodied in one piece with the force introduction element and the pressing element.
The pressure cylinder is usually moved axially in the axial direction without an intermediate lever transmission ratio by means of an operating system which has a piston which can be extended in the axial direction of the friction clutch, so that an operating force which is introduced in particular radially inwards can be transmitted axially outwards by means of the pressure cylinder to the pressure plate in order to close the friction clutch. For this purpose, a force introduction element which is radially inward, in particular in the radially inner edge region of the pressure tank, and a pressing element which is radially outward, in particular in the radially outer edge region of the pressure tank, can be provided. The force introduction element and the pressure element can be connected to one another via a disk-shaped intermediate region, the shape of which can be freely designed within specific limits. The pressure tank is preferably made of steel, which is substantially rigid at low manufacturing costs, except for slight elastic deformation under the load of the introduced operating forces. It is known that for the transmission of force between the force introduction element and the pressure element, a completely closed annular intermediate region is not required at all in the circumferential direction, so that the return spring can be formed by a disk body of the pressure tank which surrounds both the force introduction element and the pressure element. It is also known that the restoring spring, which saves design space, does not have to be formed by a disk spring, but can also be provided by elastically deformable webs which can be bent out of the material surrounding the pressure tank disk body. In particular when the pressure tank has a greater material thickness than a typical cup spring, to ensure that the integrated restoring spring in the shape of an overhanging tab can easily have a suitable spring characteristic, which spring characteristic has sufficient strength to be able to correspond to the spring characteristic of a separately arranged cup spring, only to a negligible extent at the expected maximum operating force. By integrating the return spring in the pressure tank, the number of components and the assembly effort can be reduced, as a result of which a friction clutch with low production costs is achieved.
The return spring is designed in particular as a leaf spring. The return spring can thus be designed with webs of the remaining pressure tank material thickness. The restoring spring can rest and/or bear against a component of the friction clutch which is not movable in the axial direction with a flat side and can be elastically bent significantly in the direction of its surface normal. The restoring spring, which is designed as a one-piece leaf spring, can thus be acted upon in the manner of a bending beam, so that local stress peaks are avoided and a change in the spring characteristic of the restoring spring can also be avoided by a partial plastic deformation. The longitudinal direction of the restoring spring can extend at least partially in the radial direction and/or in the tangential direction, so that a given design space ratio can be achieved in a particularly simple manner.
The return spring preferably protrudes from a disc body which can be produced by a stamping and forming process. The disc body constituting the pressure tank may be manufactured at low cost from a metal plate, where the disc body is stamped out of the metal plate and then processed into a final shape by a non-cutting plastic forming process, in particular forging, deep drawing, bending, etc. In this case, the restoring spring, which is designed in particular to connect the leaf spring, can be separated from the surrounding material part of the disk body by a separating seam in the stamping step, and then bent out of the layer surrounding the restoring spring by plastic deformation in the shaping step. The return spring is thus protruding from the surrounding material before, strong enough to take on the spring function.
It is particularly advantageous if a plurality of return springs are arranged distributed in the circumferential direction. The spring force acting on the return spring can thus be supported with a uniform force, so that stress peaks in the corresponding return spring can be avoided and/or reduced. In particular, at least three return springs are provided, so that a three-point support can be achieved by the return springs.
The invention further relates to a friction clutch for connecting an engine shaft of a motor vehicle engine to a transmission input shaft of a motor vehicle transmission, comprising a top plate for introducing torque from the engine shaft, a pressure plate which can be displaced axially relative to the top plate and which is used for pressing a friction disk which can be connected to the transmission input shaft between the top plate and the pressure plate in a friction fit manner, and a pressure pot which can be designed and improved as described above and which is used for pressing the pressure plate against the top plate when an operating force is introduced and for automatically canceling the pressure between the pressure plate and the top plate when no operating force is applied. By integrating the return spring in the pressure tank, the number of components and the assembly effort can be reduced, as a result of which a friction clutch with low production costs is achieved.
In particular, a support washer is provided, which is connected indirectly or directly to the top plate and is not movable in the axial direction, in particular in the form of a clutch cover, wherein the return spring of the pressure tank is supported on the support washer. The support washer can be arranged in particular in the axial direction between the pressure plate and the majority of the pressure tank, wherein the support washer has a through-hole for the passage of a pin provided for the respective pressure element, so that the pressure tank can reach the pressure plate with the pressure element behind the support washer via the pin passing through the support washer. Thereby, it is possible to press the return spring against the axial side of the support washer facing the majority of the pressure tank, thereby pressing the pressure tank back into an axial position corresponding to the friction clutch open position when the operating force is no longer present. As an alternative, it is also possible to position the support washer in the axial direction in the manner of a clutch cover, with the pressure tank being arranged in the axial direction between the support washer and the pressure plate. In this case, a restoring spring formed by the pressure pot can be suspended in a projecting catch of the support washer on the side of the pressure pot facing away from the pressure plate, so that the pressure pot can be pressed back into the axial position corresponding to the friction clutch open position by the restoring spring when the operating force is no longer present.
The return spring is preferably designed such that it is compressed in the axial direction when the pressure plate is moved towards the top plate in order to build up pressure. Therefore, the reset spring is prevented from being hung on the supporting gasket, and the installation is simplified.
The invention further relates to a double clutch for connecting an engine shaft of a motor vehicle engine to a first transmission input shaft and/or to a second transmission input shaft of a motor vehicle transmission, comprising a first friction clutch which can be designed and improved as described above for connecting the engine shaft to the first transmission input shaft, and/or a second friction clutch which can be designed and improved as described above for connecting the engine shaft to the second transmission input shaft. By integrating the restoring springs in the pressure tank of the respective friction clutch, the number of components and the assembly effort can be reduced, as a result of which a friction clutch with low production costs is achieved.
It is particularly advantageous if the pressure tank return spring of the first friction clutch and the pressure tank return spring of the second friction clutch are supported directly or indirectly on the same component that cannot be moved axially. Thereby reducing the number of components and reducing installation costs. And further, the manufacturing cost can be reduced.
In particular, it is provided that the first friction clutch and/or the second friction clutch are designed as a diaphragm clutch. Thereby saving radial design space. In addition, the maximum torque to be transmitted can be set for the corresponding diaphragm clutch easily by the number of friction pairs in the corresponding diaphragm clutch. Furthermore, it is also possible to cool the friction clutch with a coolant, in particular oil, wherein the reduction in the coefficient of friction caused by the coolant can be easily compensated for by increasing the number of friction pairs.
Drawings
The invention will be exemplarily described below with reference to the accompanying drawings according to advantageous embodiments, wherein the features described below may each show the inventive idea individually or in combination. Brief description of the drawings:
figure 1 is a schematic perspective cross-sectional view of a portion of a known dual clutch,
FIG. 2 is a schematic perspective cross-sectional view of a portion of the dual clutch of the present invention, and
Fig. 3 is a schematic perspective cross-sectional view of the dual clutch pressure pot of fig. 2.
Detailed Description
The dual clutch 10 according to the invention shown in fig. 2 has a first friction clutch 12 and a second friction clutch 14, which are each designed as a diaphragm clutch. For actuating the respective friction clutch 12, 14, a pressure tank 16 is provided which can be moved axially by the actuating system and which can be moved against the spring force of a return spring 18 formed by the pressure tank 16 itself in order to close the associated friction clutch 12, 14. In order to provide a restoring force when closing the associated friction clutch 12, 14, a restoring spring 18, which is designed as a bending beam and/or leaf spring, is compressed between the axially fixed support washer 20 and the pressure tank 18.
The pressure tank 16 shown in fig. 3 has a force introduction element 22 in the radially inward direction, by means of which an actuating force directed in the axial direction can be introduced by a hydraulically extendable piston of the actuating device, for example. The force introduction element 22 is connected via a disk-shaped, but bent-over intermediate region 24 of the integrated disk body 26 to pins 28 which protrude in the axial direction and which each form a pressing element 30 at their protruding ends.
As shown in fig. 2, the pin 28 may pass through the through-hole of the support washer 20 and, in turn, the hold-down element 30 may act on the hold-down plate 32 of the respective associated friction clutch 12,14 to close the friction clutch 12, 14. In the exemplary embodiment shown, the pressure plate 32 is formed from an axially outer steel sheet which can be pressed against an axially fixed top plate 36, for example, formed from an outer friction plate carrier 34, in order to establish friction pairs between friction plates which are connected alternately in a rotationally fixed manner to the outer friction plate carrier 34 and the inner friction plate carrier 38, but which can be moved axially. The torque transmitted in the friction clutches 12,14 can be further guided via the respective inner friction plate carrier 38 to the first or second transmission input shaft of the dual clutch transmission. The support washer 20 may be connected to the top plate 36 in a torque-proof manner, for which purpose in the embodiment shown the outer friction plate carrier 34 of the friction clutch 12,14 may be inserted in a torque-proof manner into a corresponding opening of the support washer 20. For introducing torque into the friction clutches 12,14, it can be provided, for example, that the support washer 20 is coupled in a torsion-proof manner to a flywheel 40 which is connected to the engine shaft of the motor vehicle engine.
As shown in fig. 3, the return spring 18 protrudes integrally from the disk body 26 and is therefore also of integral design with the radially inner force introduction element 22 and the radially outer pressure element 30. For this purpose, the return spring 18 is formed by plastic bending out of the material of the intermediate region 24 in the form of a connecting leaf spring, which can be compressed with a flat side directly or indirectly against the support washer 20 and for spring force when closing the friction clutch 12, 14. If no actuating force is introduced into the pressure tank 16, the spring force of the return spring 18 can press the pressure tank 16 into an open position of the friction clutch 12, 14, so that the friction clutch is "normally open".
List of reference numerals
10. Dual clutch
12. First friction clutch
14. Second friction clutch
16. Pressure tank
18. Reset spring
20. Support gasket
22. Force introduction element
24. Intermediate region
26. Disc body
28. Pin shaft
30. Compression element
32. Compacting plate
34. Outer friction plate support
36. Top plate
38. Internal friction plate support
40. Flywheel
Claims (8)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019118347.2 | 2019-07-08 | ||
| DE102019118347.2A DE102019118347B3 (en) | 2019-07-08 | 2019-07-08 | Pressure pot for operating a friction clutch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112196912A CN112196912A (en) | 2021-01-08 |
| CN112196912B true CN112196912B (en) | 2025-02-28 |
Family
ID=72613170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010651095.9A Active CN112196912B (en) | 2019-07-08 | 2020-07-08 | Pressure tank for operating the friction clutch |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN112196912B (en) |
| DE (1) | DE102019118347B3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021205655B3 (en) * | 2021-06-02 | 2022-10-20 | Magna powertrain gmbh & co kg | clutch assembly |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015205832A1 (en) * | 2015-03-31 | 2016-10-06 | Schaeffler Technologies AG & Co. KG | Axial multi-plate clutch |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2469114B1 (en) * | 2010-12-21 | 2017-11-01 | BorgWarner Inc. | Coupling device |
| DE102012205919B4 (en) * | 2012-04-12 | 2021-06-17 | Schaeffler Technologies AG & Co. KG | Assembly unit for a friction clutch, friction clutch and method for assembling a friction clutch |
| DE102013220624A1 (en) * | 2013-10-14 | 2015-04-16 | Schaeffler Technologies Gmbh & Co. Kg | Disc spring for a friction clutch |
| EP3137781B1 (en) * | 2014-04-28 | 2018-03-21 | Schaeffler Technologies AG & Co. KG | Cover assembly for a friction clutch |
| DE102016222503A1 (en) * | 2015-11-16 | 2017-05-18 | Schaeffler Technologies AG & Co. KG | Adjustment device for a friction clutch |
| DE102016204111A1 (en) * | 2016-03-14 | 2017-09-14 | Schaeffler Technologies AG & Co. KG | friction clutch |
| DE102016125085A1 (en) * | 2016-10-06 | 2018-04-12 | Schaeffler Technologies AG & Co. KG | Coupling device and hybrid module |
-
2019
- 2019-07-08 DE DE102019118347.2A patent/DE102019118347B3/en active Active
-
2020
- 2020-07-08 CN CN202010651095.9A patent/CN112196912B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015205832A1 (en) * | 2015-03-31 | 2016-10-06 | Schaeffler Technologies AG & Co. KG | Axial multi-plate clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102019118347B3 (en) | 2020-10-15 |
| CN112196912A (en) | 2021-01-08 |
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