DE2441141A1 - SWITCH BLOCK FOR DIAPHRAGM COUPLING, ESPECIALLY FOR MOTOR VEHICLES - Google Patents

Description

PATE NTANWALTt DR.-I NG. H. FINCKE DIPL.-ING. H. BOHR DIPL.-ING. S. STAEGER

Fornruf. "II 40 00 telegrams: Claim" Munich Poilscheckkonto, Munich 27044

Bank details Bayer. Voreinibank Münchon, account 620 404

FolderNo. 9 954 - Case

UiIIe state in the answer

& MUNICH O ₁

Mülleritraße 31 AUGUST 28, 197 **

Description of the patent application

of the company SOCIETE ANONYME FRANCAISE DU FERODO Paris / France

concerning

"Switching block for diaphragm coupling, especially for motor vehicles".

Priority: 08/28/1973 - FRANCE

The invention relates generally to diaphragm couplings, in particular for motor vehicles, i.e. clutches of the type with a first plate acting as a counter pressure plate or flywheel and rotatably connected to a first shaft, usually with the driving shaft is, a clutch disc which is axially movable with respect to the counter pressure plate or the flywheel and

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rotatably connected to a second shaft, usually the driven shaft, a second plate, which as Pressure plate is referred to and is axially movable with respect to the counter pressure plate to the clutch disc to be able to clamp or release between the plates mentioned, and a switch block with a cover that can be attached to the circumference of the counter pressure plate outside the clutch disc and the pressure plate and with a membrane, which is attached to the cover with the aid of bolts carried by this with the interposition of support members, for example rings, is pivotably mounted on both sides of the membrane, the latter having a peripheral part, which forms a kind of disc spring for clamping on the pressure plate, and a central part which is divided into radial fingers is to release the peripheral part.

The present improvement is particularly to the embodiment the support members are directed on both sides of the membrane in contact with it.

Usually the support members are brackets formed by rings of large diameter and circular cross-section and are held in contact with the membrane by bolts that are used to fasten them to the cover.

This has the consequence that the packaging of the cover, the rings and the membrane at the point of the bolts is relatively is rigid, whereby a good local retention of the rings on the bolts is ensured, but can between the latter the rings have their own play, on the one hand to their damage and / or to shorten their Lifetime can lead and on the other hand to irregular and unsafe support conditions, reducing fatigue of the

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Membrane is reinforced.

In addition, the rings can be one and the same membrane are assigned, come into an eccentric position with respect to one another from one side of the membrane to the other, As a result, the membrane is exposed to additional stresses caused by panels when pivoting.

In addition, the rings mentioned in turn form a proportion Easily damaged organs and any breakage of the same means that the coupling is no longer functional and the fault requires the clutch to be removed. It has already been suggested at least the ring that is itself located between the lid and the membrane, by a Replace bulge that is annular in the lid

However, the formation of such a bulge is impossible if the cover has a comparatively large thickness, what is the case with couplings intended for heavy vehicles.

It is also difficult to give the support surface formed by such a bulge the desirable flatness to lend.

It has also been proposed to close the rings by supporting members of a substantially circular outline lend, optionally divided into wreath-shaped segments are.

In the previously known embodiments, however, it was always admitted that it was necessary to provide a certain elasticity in the package from the lid, the membrane and the Abstützglie _T countries on both sides of the same, so that such

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Package does not cause the membrane to be clamped too rigidly, which would lead to an undesirable residual tension when the clutch is disengaged ', as well as a hysteresis, which elasticity is either obtained thereby that profile pieces are used for the support members which themselves have substantial elastic properties, or that the support members separate elastic Funds are allocated.

The use of support members made of a material with good elastic properties is expensive and sensitive.

The present improvement is based on the observation that it is contrary to popular belief from that moment on it is not necessary to have elasticity when assembling the support members, at which the latter have sufficient deformability during installation to allow such installation make it possible without the membrane experiencing excessive restraint.

To this end, the invention proposes to use a deformable material for the manufacture of the support members, i. a material with a low elastic limit, for example mild steel.

The object of the improvement is therefore a switching block for membrane couplings, in particular for motor vehicles from the " Kind with a cover that can be attached to a first plate on the circumference, which acts as a counter-pressure plate or flywheel can be referred to, and a membrane that is attached to the cover by means of bolts carried by this with the interposition is pivotably mounted by support members on both sides of the membrane, which membrane has a peripheral part,

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which bidet an elastic ring in the manner of a plate spring for tightening on a second plate, which can be referred to as a pressure plate and serves to create a clutch disc to clamp against the counter pressure plate, and a central part, which is divided into radial fingers, for switching the release of the peripheral part, with the improvement differs in that at least one of the support members has a badge made of a material of lower The elastic limit, for example mild steel, is which badge has at least one flat surface on one side has around a bore for receiving one of the bolts and for supporting it against a shoulder, and on the other side a circularly elongated rib, which protrudes from the flat surface mentioned and to the Support against the membrane is intended.

Such a support member made of mild steel, which can have several flats on each of its sides, which optionally continue from one to the other and each of which is provided around a bore for receiving several bolts and which can be divided into several elements that are regularly distributed in a circular arrangement and optionally combined with one another is advantageous economically producible.

It also has other advantages.

In particular, it automatically enables the inclusion of possible manufacturing tolerances of the various during assembly used parts, which above all enables the use of assembly bolts that have the same usable shaft length have between the shoulders regardless of the thickness of the membrane.

In fact, the clamping of the membrane between the brackets

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support members solely due to the elastic limit of the same, regardless of the deformation that this Support members at the point of the bolts that fasten them to the cover ».

In other words, tightening the membrane between the support members is different from tightening the latter independent by the bolts.

These bolts can therefore provide a rigid and therefore secure riveting of the various parts that they include, guarantee.

In the practical embodiment, such a bolt for this purpose advantageously two shoulders, one to support a first plaque, which is the support member a first side of the membrane forms, the other to support a second plaque, which is a support member for the other side of the membrane, the bolt has two ends of diminished shape outside its shoulders Diameter that are intended for riveting, namely the one on one of the plaques mentioned outside the same, the other on the lid on the outside of the badges or the lid, and the distance that the one shoulder of such a bolt separates from the other, is smaller than the distance that before riveting the Support flats separates the plaques, which are associated with the ribs of the same when the flats mentioned are parallel, so that the riveting process results in the deformation of the plaques mentioned.

The object of the improvement is a switching block for a diaphragm coupling, in particular for motor vehicles, of the Kind with a lid that is on the periphery on a first plate

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that can be attached as a counter pressure plate or. Flywheel can be referred to, and a membrane, which is on the cover by means of bolts carried by this underneath Interposition of support links on both sides: the membrane is pivotally mounted, which membrane has a peripheral part that has a spring ring in the manner of a Forms a disc spring for the tensioning effect on a second plate, which can be referred to as a pressure plate and is used to to clamp a clutch disc against the counter pressure plate, and a central portion divided into radial fingers for releasing the peripheral portion, the improvement differing in that each of the support; links is a badge that has on one side at least one Ausf lachung that 'around a Bore is provided around, which serves to receive one of the bolts and to support against a shoulder ■ of the same, and on the other hand a circularly elongated one. Rib opposite to the mentioned flattening. sticks to Support against the membrane mentioned, one and the same bolt has two shoulders, one to support one first badge, which is a support member of a first. side of the The membrane forms, the other to support a second plaque, which is a support member for the other side, the membrane forms, while the bolt is outside the shoulders-two Having ends of reduced diameter intended for riveting, one end to one of those mentioned. Badges on the outside of the same and the other on the lid outside the other badge and on the exit. sens side of the lid, whereby the distance separating one shoulder of such a bolt from the other is smaller than the distance that the support flats before riveting separates the plaques associated with the ribs of the same when the flats mentioned are parallel so that the riveting process causes a deformation of the

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chains.

To ensure a suitable clamping of the membrane between the To achieve spring rings forming plaques, it is possible to play together on the lever arm, which is through the plaques is formed, i.e. at the distance that radially separates its support rib on the membrane from the bolts that attach them to the lid, and / or to the distance between the hole and the axis of the bulge and to the Thickness of the sheet.

Preferably that is necessary to deform the badges Force higher than the maximum release force.

The object of the improvement is also the creation of a diaphragm coupling with a switching block of the following in Art.

Further goals of the improvement, their features and their advantages emerge from the following detailed and exemplary description in connection with the accompanying drawings, namely show:

Fig. 1 is a partial view in axial section of an inventive Switching blocks for clutches;

Fig '. 2 shows, on an enlarged scale, an end view of one of the badges, the spring washers in the aforementioned switching block form;

3 shows a partial view of the badge in section along the line III-III in FIG. 2;

Fig. 4 is a view in section along the line IV-IV in Fig. 2;

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FIG. 5 shows an individual representation similar to FIG. 1; FIG.

Fig. 6 is a partial end view similar to Fig. 2 of a modification;

Fig. 7 is a view in section along the line VII-VII in

Fig. 6; '■

Fig. 8 is a partial plan view showing a possible Represents the type of connection between plaques forming spring rings;

FIG. 9 is a view similar to FIG. 1 of another embodiment.

The improved switching block shown in the drawings has a cover 10, which on its circumference 11 is attached to a counter pressure plate or »to a flywheel (not shown). can be attached, for what purpose the mentioned scope; 11 is provided with fastening bores 12 in places.

In a ring-shaped arrangement, the cover 10 carries on its central part Bolt 13 through which the membrane 14 on the cover with the interposition of parts 15 of circular Perimeter, which form support members, is pivotably arranged.

Each bolt 13 has a central shank 16 extending through two shoulders 17 is limited against which the parts 15 rest, then on which shoulders 17 the bolt through Ends 18 of reduced diameter is elongated.

One of these ends 18 extends through a support member by means of a hole provided in this .20, then through

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the cover 10 through a bore 21 provided therein and is finally riveted at 22 to the outside of the lid.

The other end 18 of the bolt extends through the other support member 15 by means of a bore 20 therein and is then riveted at 24 to the outside of the support member 15.

The membrane IU has a peripheral portion 25, the one Has spring washer on the type of a plate spring to act on a pressure plate, not shown, and serves to ' to press a clutch disc (not shown) against the associated counter pressure plate. This peripheral part is provided with passages 2 6, which can accommodate the bolts 13 with play.

Furthermore, the membrane 14 has a central part 28, which in radial fingers 2 9 for actuation to release its peripheral part 25 is divided.

According to the present improvement, each support member 15 is preferably made of a material of low elastic limit, made of mild steel, for example.

In the illustrated embodiment, the support member is 15 divided into several badges 30, which are regularly distributed in a circular shape and each form a wreath segment.

Such a badge 30 is shown separately in FIG.

It has on one side 31 at least one flattening 32 around a bore 20, which bore to Receipt of a bolt 18 is determined and what flattening

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rests against a corresponding shoulder 17 of the bolt, and a support rib 33 which is circular and opposite the flattening 32 protrudes for support against the membrane 14.

In the embodiment shown in FIG each badge 30 is provided with a plurality of flattened areas 32 which are spaced apart from one another in the circumferential direction thereof and each of which is extended beyond the support rib 33.

The support rib 3 3 is wreath-like and in the circular direction uninterrupted and is formed by a bulge formed in the badge 30, the peripheral ends 35 are rounded, as shown in FIGS. 2 and 3.

The flats 32 could of course be circular and uninterrupted from one to the other along the badge

get lost. . .

In the embodiment shown in FIGS. 2 and 3, the radial width of the flats 3 2 is relatively low, so that at the point of these flattening, the badge 30 has lugs 37 of circular outline, the Top at 38, as shown in Fig. 2 and M-, beveled is.

On the other side 40, the badge 30 has at the location of the surfaces 32 on the side 31 surfaces 42 which are extend beyond the rib 33 and are parallel to the corresponding surfaces 32.

According to a feature of the improvement, which is shown in Fig. 5, the distance D that the / one of the two school

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tern 17 of a bolt 13 separates from each other, smaller than the distance D_, the one of the surfaces before the riveting 32 separates the associated support members from the other when the support members on both sides of the membrane 14 are applied to the ends 18 of reduced diameter of the bolt 13 and their surfaces 32 are parallel to each other are.

It follows from this that when the ends 18 of the bolt 13 are riveted, on the one hand on the one support member 15 the pressure plate side and on the other hand on the lid 10, as shown in Fig. 1, a deformation of each of the support members 15 takes place.

The clamping of the membrane 14 between these support members does not depend on the elastic limit under these conditions the material they are made of.

A material is chosen, and the support members are so dimensioned that this restraint is preferably somewhat is stronger than the maximum release load.

With this arrangement, the possible manufacturing tolerances of the various used Parts are compensated, whereby the advantages set out above can be achieved.

In the modification shown in Figs. 6 and 7 is the mean width of the flats 3 2 of the support members 15 forming badges 30 sufficient so that the badges are no longer at the point of the flattened areas an extension are formed.

In the embodiment shown in FIG. 8, the

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Badges 30 connected to one another, for example, by being plugged into one another.

For this purpose, each badge 30 has at one end, an extension 4 6, for example of circular circumference, while its other end with one to this Extension complementary cutout 4-7 is provided.

In the exemplary embodiment described in more detail above Forms a support badge 15 only a circular section and can have several badges of this type in a circular Arrangement can be provided successively on the corresponding surface of the membrane.

Such a badge can of course form a continuous circular ring, in which case a single one Badge on the corresponding side of the membrane is necessary.

This makes it easier to assemble the block.

Such an arrangement is provided in the embodiment of FIG.

In the embodiment shown in FIG. 9, the the membrane 14 associated pivot means on that side of the membrane 14 which faces the cover 10, by a Ring 50 is formed.

For the rotationally fixed arrangement of this ring 50 is on the cover a shoulder 51 is provided which is substantially perpendicular to the corresponding face thereof so that the ring 50 is held on the one hand between this shoulder and on the other hand by the bolts 13 which envelop it from the outside.

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Such a shoulder 51, as shown, can be achieved by a deformation made on the thickness of the cover 10 can be obtained.

On the other side of the membrane 14 facing away from the lid is, the pivoting means associated with the membrane, as described above, are supported by a support plate 15 formed from mild steel, which on its side facing the membrane 14 on the one hand at least one Flattening 32 has around a bore 20, the latter can receive a bolt 13, which bolt is supported against the mentioned flattening by a shoulder 17 ·, and on the other hand a circularly elongated one Rib 33, which protrudes opposite the flattening 32, and by means of which the support plate 15 against the membrane

14 is present.

In the embodiment shown, such a support plate 15 separately forms a coherent circular one Ring.

In the example shown, the flattening 32 has the Form of a coherent circular ring, which also applies to the support ring 33.

As described above, when the ends 18 are riveted, each bolt 13 is on the one hand on the support plate

15 and on the other hand on the cover 10 received a deformation of this support plate, so that possible manufacturing tolerances can be recorded, and the clamping of the membrane 14 depends only on the elastic limit of the material, from which the support plate 15 consists, usually made of mild steel.

The preceding description is of course not restrictive

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to interpret. ·

In particular, the ring of the embodiment according to Fig. Can be replaced by a support plate made of mild steel, which is similar to the badge used on the other side of the membrane, be it that the badge is circular and is in the form of a continuous ring, as described in connection with Fig. 9, or circular is divided into several separate sections, as in. Connection described with Figs. 1-8.

Of course, any material with a low elastic limit can be used which is suitable for the production of the support plate described.

Patent claims:

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Claims (1)

2441 HI patent claims (1.j switch block for diaphragm couplings, especially for Motor vehicles of the type with a lid that on the circumference of a first plate - counter pressure plate or flywheel - can be attached, and one Membrane attached to the cover by means of bolts carried by this with the interposition of support members is arranged pivotably on both sides of the membrane, vjelche membrane has a peripheral part in the form of a Has spring washer in the manner of a plate spring for acting on a second plate, which acts as a pressure plate can be designated and is used to clamp a clutch disc against the counter pressure plate, and a central part which is divided into radial fingers for releasing the peripheral part, characterized in that that at least one of the support members (15) has a badge (30) made of a material of lower The elastic limit, for example made of mild steel, is which badge on one side at least a flattening (3 2) around a bore (20) for receiving one of the aforementioned bolts (13) and for Has support against a shoulder (17) of the same, and on the other hand a circularly elongated rib (33), which protrudes opposite the aforementioned flattening to support against the membrane (14). 2. Switching block according to claim 1, characterized in that - 16 -5098 10 / 0-34 1 2U1U1 a flattening (32) is also provided on the other side of the plaque forming a support member (15) which is parallel to and opposite to that of the first side. 3. Switching block according to claim 2, characterized in that the second flattening is extended beyond the rib (33) associated with the first. Switching block according to Claims 2, 3, characterized in that the and a support member forming rib (3 3) has been formed by bulging. 5. Switching block according to claim 4, characterized in that the peripheral ends (35) of the bulge are rounded. 6. Switching block according to claims 1-5, characterized .characterized, that the plaque (30) forming a support member has several flats (32) on each side, which are possibly continuous to one another and each of which is provided around a bore (20), the latter for receiving a bolt (13) serves. 7. Switching block according to claims 1-6, characterized by that the support member (15) is regularly distributed in a number of plaques (30) in a circular arrangement and - 17 - 509810/0341 M 9954 is divided. Switching block according to Claim 7, characterized in that the badges (30) are connected to one another. Switching block according to claims 1-8, characterized in that one and the same bolt (13) has two shoulders (17), which have a plaque (30) on the first side of the membrane (IU), which forms a support member, on the first side of the membrane (IU) others to support a second plaque forming a support member on the other side of the membrane (14), outside the shoulders (17) of the bolt (13) having two ends (18) of reduced diameter which are intended for riveting, one against one of the above-mentioned badges on the outside of the same, the other against the cover (10) on the outside of the other badge (30) and to the cover (10), and the distance (D-) of one of the mentioned shoulders (17) being one such bolt (13) separates from the other, is smaller than the distance (D ₂ ) which, before riveting, separates the flats (32) of the plaques associated with the ribs of the same, when the flats are parallel, thus at the Riveting a V deformation of the plaques mentioned is obtained. 10. Switching block according to claim 9, characterized in that the force necessary for the aforementioned deformation is greater than the maximum release force. - 18 509810/0341 11. Switching block for membrane couplings, especially for Motor vehicles of the type with a lid that is on Circumference on a first plate - counter pressure plate or flywheel - can be attached, and a membrane, on the cover by means of bolts carried by this with the interposition of support members to both Sides of the membrane is arranged pivotably, which membrane has a peripheral part which has a spring ring in the manner of a disc spring to act on a second plate, which can be referred to as a pressure plate, forms and serves to clamp a clutch disc against the counter pressure plate, and a middle part, which is divided into radial fingers for actuating the release of the peripheral part, characterized in that each support member is a badge which has at least one flattening (32) on one side, which is provided around a bore (20), which the latter serves to receive one of the bolts (13) which Flattening to support against a shoulder (17) of the Bolt is determined, while the badge on its other side has a circular rib (33) opposite the aforementioned flattening protruding to support against the membrane (IU), each bolt (13) with two shoulders (17) is formed, one for supporting a plaque forming a support member on the one Side of the membrane, the other to support a second plaque forming a support member on the another. Side of the membrane, each bolt from the shoulders (17) outwardly two ends (18) of reduced Has diameter that are intended for riveting, the one against one of the plaques mentioned their outside and the other on the lid (10) ″ outside of the other badge and the lid, and - 19 50981 0/034 1 M 9954 * 0 2ΛΑ1141 wherein the distance (D.) which separates one of the mentioned shoulders (17) of such a bolt (13) from the other is smaller than the distance (D ₂ ) which, before riveting, the support flats of the plaques associated with the ribs of the same separates when the mentioned flats (32) are parallel, so that the riveting process results in a deformation of the mentioned plaques. 12. Switching block according to claims 1-11, characterized in that that a support badge by itself only forms a section of a circle. 13. Switching block according to claims 1-11, characterized in that a support plate alone is a contiguous circular ring forms. Switching block according to claim 1, characterized in that on one side of the membrane the support member has a Support plaque in the form of a coherent circular Ring and on the other side of the membrane, the corresponding support member is a ring (51). 15. Diaphragm coupling with a switching block according to the claims 1-14. For: SOCIETE ANONYME FRANCAISE DU FERODO PATENTftNWAI.nl HMSO-H-FIiKr '. : · ' .IMG. M.BOHR - 20 - BlPL-INO ^. .MMtufcR 509810 / 03- ^ 1