KR100301972B1 - Diaphragms used in automotive clutch devices and clutch devices including them - Google Patents

Abstract

The present invention relates to a diaphragm comprising a dish ring and radial fingers 62 divided by a slot 64. Openings 181, 182, 183 are provided for passing the tightening means 20. Slot 64 comprises a buttonhole shaped portion. At least one buttonhole is enlarged locally to make a third opening 181 for passing the fastening means 20 of the fastening screw 2.

The invention also relates to a clutch device comprising the diaphragm described above.

Description

Diaphragm used in automotive clutch device and clutch device comprising same

1 is a partial elevation view of a clutch device with a diaphragm in accordance with the present invention;

2 is a cross-sectional view taken along the line 2-2 of FIG.

3 is a partial view of the clutch friction plate as seen in the direction of the arrow 3 in FIG.

4 is a longitudinal sectional view of the fixing screw in the state of exiting the opening connected in the clutch friction plate.

5 is a partial view of a diaphragm of the present invention.

* Explanation of symbols for main parts of the drawings

1: flywheel 3: clutch friction plate

4 pressure plate 5 cover

6: diaphragm 8: crankshaft

20: tightening means 61: dish ring

64: slot 181: opening

The present invention consists of a diaphragm used in the clutch device, in particular a periphery consisting of a Belleville ring, and a central portion divided into slots by radial slots. A diaphragm for an automobile clutch device of a kind provided with an opening for passing a screw-type fastening means fixed to a drive shaft.

Such diaphragms are described in DE-A-30 13 298 and FR-A-2 662 767. In practice, the opening weakens the finger of the diaphragm and the one locking screw must be displaced for the other by the closing angle to the drive shaft of the clutch device. It is therefore necessary to provide a unique opening, ie a third opening of the same height as the diaphragm.

The insertion of this third opening should keep the opening flush with the finger so as not to break the finger. All openings also provide greater flexibility to the fingers of the diaphragm. This increased flexibility is undesirable because in order to obtain an equivalent clutch break elapsed time, the friction pad of the clutch friction plate must not be properly released by reducing the rise of the pressure plate which typically constitutes the clutch device with the clutch friction plate. to be.

In addition, the insertion region of the finger of the diaphragm should not be too long in circumference, since the region controls the predetermined deformation of the diaphragm's dish ring in a suitable manner. The diaphragm should provide a maximum supported surface for the clutch disconnect butt to reduce wear.

It is an object of the present invention to meet the aforementioned needs.

According to the present invention there is provided a cylindrical diaphragm, wherein the slot of the diaphragm of the present invention has a narrow slot and has a gap shape leading to the central opening of the diaphragm, and the diaphragm of the diaphragm passes through the fastening means of the fixing screw. A third opening is provided at the same height as the gap of the slot separating the fingers two by two, the third opening being disposed only in one of two adjacent radial fingers formed by the gap.

By this third opening, the closing angle of the clutch device can be proportional to the drive shaft, the maximum value of which depends on the material of the corresponding finger since the third opening constitutes an elongated space.

The third opening is advantageously present on the inner side of the gap of the associated slot.

With this arrangement, the insertion area of the diaphragm finger can be reduced and the finger provides a large support surface for the clutch break butt. Other openings may also be formed in certain cases by gaps in slots disposed in the associated two fingers of the diaphragm.

As an important feature, arrangements have been studied that can further reduce the flexibility of diaphragm fingers.

In addition, a diaphragm of the type described above, wherein the radial fingers are divided into two radial finger elements by a gap, is characterized in that at least one gap is enlarged to make a first opening through which the fixing screw can pass. do.

In addition, by extending the fingers of the diaphragm, their resistance is excellent despite the openings, and they are less flexible than the fingers of the diaphragm of the prior art.

By the gap, the finger insertion area of the diaphragm can be reduced, unlike its inner periphery, so the finger provides a large support surface for the clutch break butt.

As a further feature, at least one second opening for passing the fastening means is provided at the same height as the slot of the finger of the diaphragm separated by two, the second opening being located at two adjacent fingers of the associated diaphragm. do.

In addition, the gap associated with the third opening has a unique shape to provide the finger with good mechanical pivot motion characteristics.

With this series of three openings, an ideal solution to address the issues raised is obtained, and there is also the possibility of having multiple openings.

In another aspect, the diaphragm of the present invention includes at least one friction radially inserted under a spacer bar connecting a window and two partitioned guided rings and an intermediate member of a circumferentially actuated elastic element chamber. Integrated into a clutch device comprising a ring, wherein the spacer bar is radially inserted around the inner circumference of the window, and openings through the clutch friction plate are radially inserted below the window in the space allowed by the friction ring. It is characterized by.

The openings are preferably inserted at the same height as the lower corner of the window.

This arrangement ensures complete preservation of the function of the clutch friction plate and minimizes its resistance reduction.

In addition, the clutch device can be assembled with a fixing screw having excellent performance not only for the diaphragm but also for the clutch friction plate.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

In the figure, it can be seen that the flywheel 1 is mounted on the crankshaft 8 of the automotive internal combustion engine by means of a plurality of fastening screws 2. At this time, the flywheel 1 forms the reaction plate 1 of the clutch for automobiles. It is understood that the flywheel 1 of this figure is integral but may be divided as described in FR-A-2 662 767.

If the flywheel comprises a first inertia fixed to the crankshaft 8 by a screw 2, the second inertia comprises a plate forming a clutch reaction plate.

The first inertial body provides a central hub capable of securing the flywheel on the crankshaft.

The clutch also comprises a flywheel 1, ie a reaction plate, a clutch friction plate 3, a pressure plate 4, a cover 5 and a diaphragm 6, at least continuously in the longitudinal direction. All of these parts are in the form of rings.

In FIG. 2, the flywheel 1 is fixed to the crankshaft 8 of the internal combustion engine in this embodiment with respect to the drive shaft.

The clutch friction plate with the friction pad 35 is fixed to the drive shaft 7, the input shaft of the known gear box in this embodiment via a hub 31 having a spline groove therein, the end of the drive shaft 7 being complementary. Spline grooves.

The cover 5 is fixed to the rotating body of the reaction plate 1 and is mounted axially with respect to the rotating body.

The diaphragm 6 is fitted to the support on the cover 5 and faces the pressure plate 4 towards the reaction plate 1 to axially fix the clutch friction plate between the two reaction plates 1 and the pressure plate 4. ) The diaphragm 6 has a hollow cone shape and includes a circularly continuous periphery forming a dish ring 61 and a circular central portion divided into radial fingers 62 by a slot 64.

The inner end of the slot 64 leads to a central opening shared by all fingers 62 around the inner circumference of the center.

The outer end of the slot 64 leads to a rectangular enlarged orifice 63 inserted at the same height as the inner circumference of the dish ring 61 (FIG. 5). Slot 64 is a generally narrow slot, which has a gap shape in which the central opening of the diaphragm is opened.

There is a diaphragm 6 rotatably mounted to a concave dish-like cover 5, which has a radial ring at its outer periphery, on a fixed shore 55, with a bottom open at the center ( 56) a radial ring is bonded.

The fixed shore 55 is used to fix the cover 5 to the reaction plate 1 by screws 13 to connect the cover 5 to the reaction plate 1 in a rotatable axial direction.

Modifications such as the riveting method or the joint fixing method as described in FR-A2 256 104 may be carried out.

As described in FR-A-2 258 424 (US-A-4 751 991), the diaphragm 6 is attached to the first support 53 supported by the cover 5 using assembly means. By continuously attaching axially with the elastic tightening load, the diaphragm 6 may be rotatably fixed to the cover 5 to perform assembly. In this case, the support is made of a metal plate, but as a variant it may also serve as a connection.

The assembly means includes a retaining flap 51 formed in a bent form from an adjacent portion of the bottom 56 of the cover 5. The flap 51 is axially exited through the diaphragm 6 by an enlarged orifice 67 as described below, and bent in an opposite direction to the axis of the assembly and together with the axial outlet of the fixed elbow. It has an end wing that delimits.

A second support 54, which is a conical end-connecting, is in contact with the elbow and provides a second support opposite the first support to assist in the installation of the diaphragm.

As a variant, the assembly means may comprise a spacer bar and a connection, as described in FR-A-2 311 221.

Normally, the clutch is fixed and the clutch friction plate 3 is tightened between the reaction plate 1 and the pressure plate 4. For clutch disconnection, the clutch disposes of the charges affecting the pressure plate 4 through the diaphragm, with the aid of the clutch disconnection butt shown at 70 in view of arrow F (FIG. 2). Together with the release of the clutch friction plate and in particular the clutch disengagement to change the speed, it can be propelled on the inner end of the finger.

In the clutch disconnection operation, the pressure plate 4 is raised by the pin 43 as described later, and the pressure plate 4 is returned to the cover bottom 56 by the pin.

In the diaphragm, the inner circumference of the dish ring 61 is fixed between the first support portion 53 and the second support portion 54, and the outer circumference of the dish ring 61 has an annular edge 41 separated from the pressure plate. It is fixed on).

Of course, the clutch may be of the type as described, for example, in FR-A-2 463 874.

In this way, the diaphragm is fixed on the support circumferentially supported by the cover, and the outer circumference of the diaphragm ring is fixed on the pin of the pressure plate.

In this case, the butt is pulled to the finger end of the diaphragm to relieve the stress exerted by the diaphragm for the clutch release.

The cover may have only a diaphragm as described in FR-A-2 550 835.

The pressure plate 4 is rotatably fixed together with the cover 5 and also rotatably fixed with the flywheel or the reaction plate 1, and according to the tangential elastic pin 43, in this specification, three elastic pins ( Axially movable according to 43).

To make this state, the pressure plate 4 provides three ear members 42 around the outside by driving and pinning the pins with reset joints, which pin members are fixed to the other end of the cover by rivets. One of the fixing points is shown by reference numeral 57 in FIG.

Of course, this connection can be in the form of a tenon hole, with the radial flap of the pressure plate passing through a complementary thin groove disposed within the border of the cover.

As a variant, the tenon-shaped connection may be carried out between the annular edge of the pressure plate and the reaction plate, as described in FR-A-2 500 835, in which the cover is in the form of a plate.

As described in US Pat. No. 4,892,177, it may be replaced by a device having two pressure plates and one withdrawal tube.

The clutch friction plate 3 comprises two coaxial parts mounted to overcome the circumferentially actuated elastic means 36 and the axially actuated friction means 39 and to move the other part with respect to one part.

The first component then comprises two guide rings 33 interconnected by spacer bars 37, which spacer bar 37 also has a function of securing a disk 34 connected to one of the guide rings 33. . The disc 34 supports its outer circumference on each surface of the arbitrarily divided friction pad 35.

The friction pad 35 is fixed between the reaction plate 1 and the pressure plate 4 to shift the pair of shafts to the drive shaft.

The second part of the friction plate 3 comprises an intermediate member 32 inserted axially between two guide rings 33. The friction plate is of the type as described in EP-AO 382 616, and the intermediate member 32 can be rotated relative to the hub 31 with a clearance defined by the engagement means in the clearance. To be fitted. A reference example of this is FIG. 3 of EP-A-O 382 616. Somewhat tense elastic means is also provided.

Of course, the intermediate member 32 may be connected to the hub 31, and move about the hub 31 to connect the induction ring with the hub 31, and the disk 34 is connected to the intermediate member 32. You can also convert it.

The friction means 39 includes two friction rings 131 and elastic tightening means having the same shape on both sides of the intermediate member 32. The resilient means pulls one guide ring and the intermediate member 32 toward the other guide ring 33, and another ring 131 between the intermediate member 32 and the other connected guide ring 33. ) Is supported by the ring 131 to fix it in the axial direction.

An annular bearing 132 radially inserted between the inner circumference of the associated induction ring and the hub 31 is provided with an L-shaped cross section. The bearing 132 is shown in FIG. 2, which includes an arch passing through the corresponding opening of the guide ring to guide it by rotation.

The friction ring 131 is annular and includes three triangular protruding vertices with a burst passing through corresponding openings provided in the induction ring. The ring 131 also cooperates with the rotation of the guide ring 33.

The guide ring 33 extends in the axial direction on both sides of the intermediate member 32. Spacer bar 37 extends around the outer side of the ring and penetrates intermediate member 32 through rectangular opening 38, which protrudes around the outer side of the opening.

The circumferentially acting elastic means 36 consists of a helical spring mounted partly in the window of the intermediate member 32 and partly in the window of the guide ring, the windows being mounted facing each other, which is shown in FIG. As shown by reference numeral 135.

The opening 38 alternates with three windows 135 in the circumferential direction, as are all springs 36 mounted without gaps in the window. Of course, in some cases, a particular spring having a block shape made of elastic material may be mounted with a gap in the window of the intermediate member 32 in order to vary the interference.

The friction means 39 are radially inserted under the window 135 and the spring 36 as shown in FIG. 3, while the spacer bar 37 and its opening 38 are inward of the window 135. It is radially inserted near the perimeter (inner circumferential edge of the window 135).

The flywheel 1 has a starter tube 12 suitable for starting the vehicle by starting around its outer circumference, the flywheel 1 facing a crankshaft and a flask for assembling with a fastening screw 2. It is formed with an inner circumference of the mold, the fixing screw (2) through the opening (11) connected to the flywheel (1), respectively for fixing to the head 21 and the end of the crankshaft (8) It has a bag 22 to make.

Thus, the flywheel 1 is fixed between the head 21 of the screw 2 and the empty end of the crankshaft 8.

The fingers 62 of the diaphragm 6 are each divided into two radial finger elements by a gap 65 as described in FR-A-2 311 221. As shown in FIG. 1, one of the gaps 66 has a different shape from the other gap and will be described below.

Sides of the gap 65 are spaced apart from each other. The gap 65 is radially aligned from the closed outer end towards the inner end disposed spaced from the inner circumference of the finger 62 and the central opening of the diaphragm 6.

The inner end of the gap 65 is generally rectangular and enlarged to form an orifice 67 which is the same as the orifice 63 (FIG. 5), the orifice 67 alternates with the orifice 63 along the circumference. .

Nine retaining or mounting flaps 51 are shown in FIG. 1, the diaphragm comprising nine radial fingers 62.

The slots 64 have the same shape as the gaps 65 and are distinguished from the gaps 65 in that their inner ends are opened as slots radially coupled to the central opening of the diaphragm. The slot is narrow (Figure 3).

The flaps 51 alternate circumferentially with the radially oriented flaps 52 delimiting the inner circumference of the bottom 56 of the cover 5. The flap 52 determines the tilt range of the diaphragm when the cover 5 is not mounted on the flywheel. The flap 51 penetrates the orifice 67 of the gap 65.

By the feature of the present invention, at least one gap 65 is enlarged locally to make a first opening 183 for passing the fastening means of the fastening screw 2. The opening 183 is formed around the inner side of the gap 65.

According to the invention, at least one of the elongated gaps 65 is locally extended to form the first opening 183, which is capable of penetrating the tightening means to tighten the fixing screw 2. have. These openings 183 are formed in the inner circumference of the elongated gap 65.

In addition, a plurality of openings 183 and 182 are provided, the number of which varies depending on the use, and the number of the flaps 51 and the orifices 63 and 67 is the same.

According to the present invention, the third opening 181 is provided at the same height as the gap of the slot 64 separating the two radial fingers 62 in order to pass the tightening means 20, and the opening 181 is provided. It is placed in only one of the two adjacent radial fingers associated with it and formed using the gap.

The first opening 183 and the second opening 182 are annular. They are regularly distributed on the same circumference of the assembly.

Openings 182 and 183 are disposed symmetrically in associated slot 64 and associated gap 65, respectively.

Openings 181 (which are nearly semicircular in the drawing) are inserted on the same circumference, but are not regularly distributed compared to other openings 182 and 183. The opening 181 is only disposed in the associated finger 62 and does not affect other fingers.

The opening 181 is, by the present invention, at the inner circumference of the side of the gap 66 of the associated slot 64.

The gap 66 is curved in shape with a curved portion inclined toward the other end of the finger 62 relative to its inner circumference. The gap 66 is identical to the gap 65 on its outer circumferential surface and provides a radial portion with an orifice 67 and an inner circumference ending with the curved portion.

Six openings 181, 182, 183 are present for fixing the six fixing screws 2 distributed in a similar manner, the heads of the screws being at the connection points with the openings, while the tightening means 20 belongs to the screw bag.

There is one opening 181, three openings 182 and two openings 183.

The opening 181 and associated screw make it possible to know the closing angle of the flywheel 1 with respect to the crankshaft 8, which is particularly necessary when predicting the ignition target on the flywheel 1 or the cover 5. Do.

Such a diaphragm may therefore be suitable for fixing using three screws on the crankshaft 8.

According to another feature of the invention, the clutch friction plate 3 comprises passage openings 81, 82, 83 corresponding to the openings 181, 182, 183, respectively. These openings are axially aligned with the openings and fixing screws of the diaphragm so that each fastening means can pass through the diaphragm and clutch friction plate and be captured in the head of the hollow screw 2. The hole 23 is, for example, in the form of a hexagon or a square, which is in the same state as the tightening means 20 providing a complementary shape.

It may also include respective openings 81, 82, 83 made up of holes coincident with the openings 181, 182, 183 present in the guide ring 33, the intermediate member 32, and the disc 34. It may be (figure 2). At this time, the friction plate 3 passes through.

The openings 82, 83, which are generally circular and inserted at the same height as the inner circumferential edge of the window 135, provide an advantage to the structure of the clutch friction plate (Figure 3). The openings are inserted in the space allowed by the ring 131.

As shown in FIG. 3, the two gaps of the window 135 are disposed near the end (or corner) of the opening 82 and the inner circumferential edge of the opening 83, respectively, while the opening of the window 135 is closed. The three gaps are only located near the end (corner) of the inner circumferential edge of the opening 82.

The circular opening 81 associated with the third opening 181 is inclined circumferentially by the closing angle and is not disposed in the window 135.

The openings 81, 82, 83 extend inwardly and are inserted radially under the hole 38 across the vertices of the friction ring 131.

Due to this insertion method, the clutch friction plate is not broken during operation, and its resistance does not affect other measures by the openings.

Thus, according to the invention, the cover 5 is provided by means of a flywheel 1, a pre-centered clutch friction plate 3, a cover 5 fixed on the flywheel 1, a pin 43 together with standard parts. To form an improved clutch device comprising a pressure plate 4 mounted on the diaphragm, a diaphragm 6 rotatably mounted on the cover 5 and a fixing screw 2 essentially mounted on the interior of the device. Can be.

Openings 181 and 81 enable precentering of the friction plate, for example with the aid of a body.

Of course, after fitting the screw 2 into the hole 11 prior to mounting the friction pad 3 on the plate 1, the integrated cover 5, the pressure plate 4, the diaphragm 6 assembly are assembled. This assembly is commonly referred to as the clutch mechanism.

Once mounting of the clutch device is performed, the head of the screw is axially restricted between the flywheel 1 and the friction plate 3 so that there is no risk of escaping, and the length of the screw bag 22 is It is longer than the thickness of the flywheel 1 at the same height as the inner circumference. Since the head 21 of the screw touches between the friction plates 3, the length of the screw bag 22 is equal to the rest of the length of the bag 22 passing through the opening 11.

Of course, the openings 81 to 83 and 181 to 183 have a shorter length than the head of the screw, the length of the openings passing through the fastening means 20 and through their holes 23 in the screw head 21. This is the length that can be performed.

In addition, clutch makers have advantageously minimized the cost of placing the clutch device at the end of the crankshaft in the automobile manufacturer by applying an improved clutch device, and thus reducing the cost of performing work for the manufacturer. The choice of fixing screws, which the clutch makers do not need to store, can not involve any error.

In addition, the narrow slot is mainly included in the form of a slot 64, which is an internally open gap, to provide the maximum support force to the butt 70 in cooperation with the gaps 65 and 66.

The gap of the slot 64 associated with the opening 181 may benefit the material used for the finger 62 assigned by the opening 181 by participating in the formation of the opening.

By the orifices 63 and 67, the insertion region of the finger 62 divided into two finger elements through the gaps 65 and 66 shows no significant circumferential increase, so that the diaphragm can be easily handled. In addition, the finger 62 has a predetermined resistance. Finger 62 can minimize the force applied to the hub of the pressure plate.

Of course, the gap 66 may have a different shape, for example without its inner circumferential curve, so that the gap may exist in a radially shorter shape than other gaps.

Orifice 63 may also have a different shape than orifice 67, for example, may have a lower height.

In addition, the friction ring 131 may be rotatably connected to the intermediate member 132 of the hub.

In the figure, the ring 131 is a plastic material, which may be metallic and may be a flap of right angle for penetrating the opening connected to the guide ring or the intermediate member, so that the guide ring supports the friction ring. Done.

In this case, the spacer bar is not inserted around the inner side of the clutch friction plate window, in particular due to the problem of resistance, while the opening for passing the fastening means is inserted radially below the window and also radially on top of the friction ring. .

Of course, the head 121 of the screw 2 partially penetrates through the openings 81, 82, 83 of the friction plate (FIG. 4), and may overlap layered with the hexagonal end portion. The screw may also not protrude from the device prior to mounting.

The spacer bar 37 may extend beyond the intermediate member 32 and may cross the plane of the intermediate member 32.

The clutch device of the present invention may comprise a flywheel as described in FR-A-2 662 767 or may have a device configuration as described in DE-A-30 13 298.

As a variant of the gap 65, its inner end may be developed toward the central opening of the diaphragm by a narrow slot associated with each gap, thereby becoming identical to the slot 64 of the gap 65. In this case, a diaphragm with 18 fingers can be obtained.

Finally, the friction rings 131 need not be identical, and either one can have a smaller radial area than the other.

Claims (7)

A periphery 61 consisting of a dish ring, and a central portion divided into radial fingers 62 by a slot 64, each central portion for securing the clutch device to the crankshaft 8 as a drive shaft. Openings 181, 182, and 183 are provided for passing the fastening means 20 of the fixing screw 2, and the slot 64 of the diaphragm is a narrow slot, which forms a gap leading to the central opening of the diaphragm. In the diaphragm used for the clutch device for automobiles of this type, a slot in which the third opening 181 separates the fingers of the diaphragm by two in order to pass the fastening means 20 of the fixing screw 2 ( 64, the diaphragm being provided at the same height as the gap, wherein the opening (181) is arranged in only one of the two adjacent fingers involved and is formed in part by the gap. The method of claim 1, wherein when the radial fingers are divided into two radial finger elements by a gap 65, at least one gap 65 can pass through the fastening means 20 of the set screw 2. And a diaphragm locally enlarged to form a first opening (183). A second opening (182) for passing the fastening means (20) at the same height as the slot (64) separating the two fingers (62), wherein the opening (182) is associated. And a diaphragm disposed on two adjacent radial fingers. 4. The diaphragm according to claim 2 or 3, wherein the first opening (183) and the second opening (182) are around the inside of the gap associated with these openings. 2. The diaphragm of claim 1, wherein the gap (66) associated with the third opening (181) has an inner circumference that terminates with a curved portion that is inclined toward the other end of the associated finger. 8. A clutch device comprising a clutch friction plate having passage openings 81, 82, and 83 for fastening means of a fastening screw, said clutch device comprising a diaphragm as defined in claim 5, wherein the diaphragm opening 181, 182, 183 are axially aligned with the passage opening (81, 82, 83) of the clutch friction plate. 7. The two guides according to claim 6, wherein the clutch friction plate is mounted to both the at least one friction ring 131 and the intermediate member 32 radially inserted under the window 135 of the elastic element chamber in the circumferential action. A spacer bar 37 connecting between the rings 33, wherein the spacer bar 37 is inserted radially past the inner circumference of the window 135 and opens for the passages 81, 82, 83 of the clutch friction plate. Clutch is radially inserted under the window (135) in the space allowed by the friction ring (131).