Clutch disc with friction device
阅读说明:本技术 具有摩擦装置的离合器盘 (Clutch disc with friction device ) 是由 O.马雷查尔 D.达尔 于 2018-06-18 设计创作,主要内容包括:一种离合器盘(1),包括周边扭矩传递构件、中央扭矩传递构件(3)和至少一个扭转阻尼装置,所述扭转阻尼装置包括至少一个弹性负载垫圈(15)和摩擦垫圈(14)。所述弹性负载垫圈(15)包括环形接触部分(18)和从所述环形接触部分(18)延伸的至少两个支撑凸耳(19),所述弹性负载垫圈(15)通过其支撑凸耳(19)支承在第一旋转元件(4)上,并且通过其环形接触部支承在所述摩擦垫圈(14)上。所述弹性负载垫圈(15)包括在其支撑凸耳(19)中的至少一个中形成的至少一个通道孔(20),所述摩擦垫圈(14)包括穿过所述至少一个通道孔(20)的至少一个联接片(23)。(A clutch disc (1) comprising a peripheral torque transmitting member, a central torque transmitting member (3) and at least one torsional damping device comprising at least one elastic load washer (15) and a friction washer (14). The spring-loaded washer (15) comprises an annular contact portion (18) and at least two supporting lugs (19) extending from the annular contact portion (18), the spring-loaded washer (15) being supported by its supporting lugs (19) on the first rotary element (4) and by its annular contact on the friction washer (14). The spring-loaded washer (15) comprises at least one passage hole (20) formed in at least one of its supporting lugs (19), the friction washer (14) comprising at least one coupling tab (23) passing through said at least one passage hole (20).)
1. A clutch disc (1) for connection between an engine and a transmission, comprising:
peripheral and central torque-transmitting members (3), said peripheral and central torque-transmitting members (3) being mounted so as to be rotatable relative to each other about an axis (X); and
at least one torsional damping device interposed between the peripheral torque transmitting members and the central torque transmitting member, the torsional damping device comprising:
at least one spring (8) arranged to deform when the peripheral torque transmitting member and the central torque transmitting member (3) rotate relative to each other;
an elastic load washer (15) and a friction washer (14) coaxial with the central torque transmitting member (3) and rotationally fixed to the first rotary element (4), the elastic load washer (15) applying an axial load to the friction washer (14) disposed against the second rotary element (16), allowing relative rotation between the first rotary element (4) and the second rotary element (16),
characterized in that the spring-loaded washer (15) comprises an annular contact portion (18) and at least two supporting lugs (19) extending from the annular contact portion (18), the spring-loaded washer (15) bearing on the first rotary element (4) by its supporting lugs (19) and on the friction washer (14) directly or indirectly by its annular contact; and wherein the spring-loaded washer (15) comprises at least one passage hole (20) formed in at least one of its supporting lugs (19), the friction washer (14) comprising at least one coupling tab (23) passing through said at least one passage hole (20).
2. A clutch disc according to claim 1, characterized in that the spring load washer (15) comprises two passage holes (20) in each support lug (19).
3. A clutch disc according to any one of claims 1-2, characterized in that the friction washer (14) comprises an annular friction portion (21) and four pairs of tie tabs (23) extending substantially perpendicular to the plane of the annular friction portion (21) in the direction of the first rotary element (4).
4. A clutch disc according to any one of claims 1 to 3, characterized in that the elastic load washer (15) comprises rotation stop teeth (20) on at least one support lug (19), the rotation stop teeth (22) being inserted in rotation stop holes (25) formed in the first rotary element (4).
5. A clutch disc according to any one of claims 1-4, characterized in that the at least one coupling piece (23) is fitted into the at least one passage hole (20) such that the friction washer (14) is prevented from rotating in both directions of rotation by the spring-loaded washer (15).
6. A clutch disc according to any one of claims 1 to 5, characterized in that the at least one coupling piece (23) is furthermore inserted in at least one end hole (24) formed in the first rotary element (4).
7. A clutch disc according to claim 6, characterized in that the at least one coupling piece (23) is fitted into the at least one end hole (24) such that the friction washer (14) is prevented from rotating in both directions of rotation by the first rotational element (4).
8. A clutch disc according to any one of claims 1 to 7, characterized in that it comprises a web (9) connected to one of the central torque transmitting member (3) and the peripheral torque transmitting member, and two guide washers (4, 5) connected to the other of the central torque transmitting member (3) and the peripheral torque transmitting member and arranged on either side of the web (9), and a spring (8) interposed between the web (9) and the guide washers (4, 5), the first rotary element (4) being formed by one of the guide washers (4) or by the web (9).
9. A clutch disc according to claim 8, characterized in that the web (9) is connected to the central torque transmitting member (3), two guide washers (4, 5) are connected to the peripheral torque transmitting member, the first rotational element (4) being formed by one of the guide washers (4).
10. A clutch disc according to claim 9, characterized in that the supporting lug (19) of the spring-loaded washer (15) has a radially outer end which is arranged against one of the guide washers (4) between two consecutive springs (8) in the circumferential direction.
11. A clutch disc according to any one of claims 8 to 10, characterized in that the second rotary element (16) is an element connected to the web (9).
12. A clutch disc according to any one of the preceding claims, characterised in that the support lugs (19) extend radially towards the outside of the spring-loaded washer (15).
13. A clutch disc according to any one of claims 1 to 12, characterized in that the at least one coupling piece (23) is arranged on the outer periphery of the friction washer (14).
14. A clutch disc according to any one of claims 1 to 13, not dependent on claim 5, characterized in that a friction washer is rotationally fixedly mounted on the first rotational element and the spring load washer (15) is rotationally fixedly mounted on the friction washer, such that the spring load washer (15) is rotationally fixedly mounted to the first rotational element (4) only by means of the friction washer (14).
15. A clutch disc according to any one of claims 1 to 14, characterised in that at least one of the coupling tabs comprises a boss (42) which cooperates with an edge of the at least one passage hole (20) and forms an axial retaining element which axially retains the friction washer on the elastic load washer.
Technical Field
The present invention relates to the field of torque transmission in motorized devices, and to clutches. And more particularly to clutch discs.
Background
For example, a motor vehicle may be provided with a clutch disposed between the engine and the transmission. The clutch generally includes a clutch mechanism and a clutch plate having a peripheral torque transmitting member and a central torque transmitting member. When the clutch is in the engaged mode, the engine is connected to the transmission through the clutch plates. The peripheral torque transmitting members are then typically clamped by a clutch mechanism so as to be driven by rotation of the engine, and the central torque transmitting member is rotationally fixed to an element of the transmission, such as a gearbox of a vehicle. When the clutch is operated toward its disengaged position, the clutch mechanism releases the clutch disc and the engine is disengaged from the transmission.
In addition to its function of coupling the engine and the transmission, the clutch disc generally performs additional functions related to filtering out the non-periodic nature of the engine and other torsional oscillations. Such filtering is typically performed by one or more torsional dampers, which are spring-damper combinations that work torsionally, allowing relative rotational movement of the peripheral torque transmitting members with respect to the central torque transmitting member during torque transmission, and damping of this non-periodic characteristic. The spring may allow relative rotation and the damping may be performed by a friction device equipped with a friction washer which is axially loaded by an elastic washer, thereby dissipating the energy accumulated in the spring by friction.
During the design of the clutch disc friction device, special attention needs to be paid to:
the washers are rotationally fixed with respect to each other and with respect to the various rotating elements of the clutch disc, so as to control the position of the friction area;
-the load applied by the elastic washer;
-a volume, in particular an axial volume.
Document FR2890713 describes a clutch disc in which the torsional damper comprises elastic axial compression washers intended to act on complementary friction surfaces, these elastic washers comprising an annular portion for the movable axial bearing, which extends radially by means of radial lugs for the fixed axial bearing. The radial lugs of two consecutive elastic washers are interposed one into the other and each require a rotation stop.
The object of the present invention is to improve the clutch disc of the prior art.
Disclosure of Invention
Accordingly, the present invention is directed to a clutch disc for connection between an engine and a transmission, the clutch disc comprising:
a peripheral torque-transmitting member and a central torque-transmitting member rotatably mounted relative to each other about an axis, an
At least one torsional damping device interposed between the peripheral torque transmitting member and the central torque transmitting member; the torsion damping device includes:
at least one spring arranged to deform when the peripheral torque transmitting member and the central torque transmitting member rotate relative to each other;
an elastomeric load washer and a friction washer coaxial with the central torque transmitting member and rotationally fixed to the first rotational element, the elastomeric load washer applying an axial load to the friction washer disposed against the second rotational element allowing relative rotation between the first and second rotational elements.
The spring load washer comprises an annular contact portion and at least two support lugs extending from the annular contact portion, the spring load washer being supported on the first rotational element by its support lugs and on the friction washer directly or indirectly by its annular contact portion. Furthermore, the spring-loaded washer includes at least one passage hole formed in at least one of its support lugs, and the friction washer includes at least one coupling piece passing through the at least one passage hole.
Thus, the spring load washer and the friction washer may be rotationally fixedly mounted to the first rotational element in a radially and axially compact manner. Compactness is always an objective to be achieved in terms of the arrangement of the washers that make up the clutch disc, and the present invention allows such compactness to be achieved in a simple manner and without adversely affecting the rigidity of the individual washers.
Furthermore, the use of wide support lugs with closed apertures provided therein makes it possible to increase the rigidity of the spring-loaded gasket, compared to a spring-loaded gasket in which the perforated wide support lugs are replaced by two remote lugs having a smaller width. In other words, preferably, in order to increase the rigidity of the spring-loaded gasket with respect to the prior art spring-loaded gasket, the number of supporting lugs is divided by approximately two and their width is multiplied by twice, and closed holes are formed in these lugs.
Furthermore, the spring-loaded washer and the friction washer may be preassembled.
In addition, the diameter of the friction washer can be reduced without adversely affecting its function, so that it is possible to simply cooperate with the annular contact portion of the spring-loaded washer and to simplify its rotation blocking means in the form of one or more coupling pieces.
Thus, by means of one or more coupling tabs through one or more passage holes, the volume of the rotation blocking means of the spring-loaded washer and/or of the friction washer can be reduced.
The clutch discs may include the following additional features, either alone or in combination:
-the at least one passage hole is a closed hole. In other words, it is not a notch.
The spring-loaded washer comprises four supporting lugs distributed in two substantially perpendicular directions;
the spring-loaded washer comprises two passage holes in each support lug;
the friction washer comprises an annular friction portion and four pairs of linkage tabs extending substantially perpendicular to the plane of the annular friction portion in the direction of the first rotary element;
-the spring-loaded washer comprises a rotation-stopping tooth on at least one supporting lug, which is inserted in a rotation-stopping hole formed in the first rotary element; in other words, the spring-loaded washer may be rotationally fixedly mounted on the first rotational element via the stop tooth and the stop hole.
The rotation stop hole is a rotation stop groove.
-fitting the at least one coupling piece into the at least one passage hole such that the friction washer is prevented from rotating in both rotational directions by the spring-loaded washer; in other words, the friction washer may be rotationally fixedly mounted on the resilient load washer.
-furthermore, said at least one coupling tab is inserted into at least one end hole formed in the first rotary element; thus, the first rotational element does not form an obstacle to the axial movement of the spring-loaded washer.
-the at least one coupling piece is fitted into the at least one end hole such that the friction washer is prevented from rotating in both rotational directions by the first rotational element; in other words, the friction washer may be rotationally fixedly mounted on the first rotational element.
The clutch disc comprises a web connected to one of the central torque transmitting member and the peripheral torque transmitting member, and two guide washers connected to the other of the central torque transmitting member and the peripheral torque transmitting member and arranged on either side of the web, and a spring interposed between the web and the guide washers, the first rotary element being formed by one of the guide washers or the web.
The clutch disc comprises a web connected to one of the central torque transmitting member and the peripheral torque transmitting member, and two guide washers connected to the other of the central torque transmitting member and the peripheral torque transmitting member and arranged on either side of the web, and a spring interposed between the web and the guide washers, the first rotary element being formed by one of the guide washers;
the clutch disc comprises a web connected to the central torque transfer member, and two guide washers connected to the peripheral torque transfer members and arranged on either side of the web, and a spring interposed between the web and the guide washers, the first rotary element being formed by one of the guide washers;
-the supporting lugs (19) of the spring-loaded washer (15) have a radially outer end which is arranged against one of the guide washers between two circumferentially consecutive springs.
The second rotating element is an element connected to the web;
the second rotating element is a pre-damper box fastened to the web;
-the spring-loaded washer has a substantially frustoconical shape, the annular contact portion being on the tip side of the cone and the support lugs being on the base side of the cone.
-the support lugs extend radially towards the outside of the spring-loaded washer;
-said at least one coupling tab is arranged on the outer periphery of said friction washer;
-the at least one coupling lug extends radially towards an outer diameter of the friction washer;
-rotationally fixedly mounting the friction washer on the first rotational element and the spring load washer on the friction washer such that the spring load washer is rotationally fixedly mounted to the first rotational element only by the friction washer.
At least one of the coupling tabs comprises a boss cooperating with the edge of the passage hole and forming an axial retaining element which axially retains the friction washer on the elastic load washer; thus, the spring loaded washer and the friction washer may form a preassembled subassembly.
The bosses can be obtained by means of deformation of the coupling piece, for example by shot peening;
the coupling tabs may also extend in the axial direction to promote axial retention between the bosses and the associated passage holes.
Drawings
Preferred exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which:
figure 1 shows a clutch disc according to the present invention in perspective view;
figure 2 shows the web of the clutch disc of figure 1;
figure 3 shows a guide washer of the clutch disc of figure 1;
FIG. 4 is an exploded view showing a spring loaded washer and a friction washer of the clutch of FIG. 1;
FIG. 5 shows the web of FIG. 2 in perspective view in association with the gasket of FIG. 4;
FIG. 6 shows the assembly of FIG. 5 in association with the guide washer of FIG. 3;
FIG. 7 shows the two gaskets of FIG. 4 in an assembled state;
FIG. 8 is a detail view of FIG. 7;
FIG. 9 is a detail view of FIG. 3;
FIG. 10 is a modified embodiment similar to FIG. 9;
FIG. 11 is a modified embodiment including an axial retaining element between the spring loaded washer and the friction washer.
Detailed Description
In the description and claims, the terms "outer" and "inner" and the orientations "axial" and "radial" will be used to indicate the elements of the torsional damper according to the definitions given in the description. The axis of rotation (X) (as shown in fig. 1) determines the "axial" orientation. The "radial" orientation is perpendicular to the axis (X). The "circumferential" orientation is perpendicular to the axis of rotation (X) and orthogonal to the radial orientation. The terms "outer" and "inner" are used to define the relative position of one component with respect to the other with reference to the axis of rotation (X), the component close to this axis being therefore called inner, on the contrary, the one positioned radially at the periphery being the outer component. Furthermore, the represented angles and angular sectors are defined relative to the rotation axis (X).
Fig. 1 shows a
The
Typically, the
The
Figures 2 and 3 show the
The
In fig. 3, the
Possible relative rotation between the
Fig. 4 shows in perspective view the spring-loaded
The spring-loaded
In the present example, the
In the present example, each supporting
The
The
Fig. 5 shows the
Thus, the spring-loaded
The
Fig. 8 is a detailed view of the assembly of fig. 7 and shows one of the support lugs 19 of the spring-loaded
The
According to a number of variants, the
According to a first variant, and with reference to fig. 9, the
In this first embodiment, the
According to this first variant, the
According to a second variant, the
According to a third variant with respect to fig. 10, the supporting
Fig. 11 depicts a variant embodiment of the
Other modified embodiments may be implemented without departing from the scope of the invention. For example, the
Furthermore, the pair formed by the
Instead of a
Furthermore, for a clutch disc comprising a plurality of torsional dampers, the invention may be applied to any torsional damper.
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