JPS591817A - Center fixing screw type clutch particularly for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates generally to clutches of the type commonly used in motor vehicle manufacturing.

As is well known, this type of clutch generally has a first plate, usually called a reaction plate or flywheel, which is integrated with a first shaft, which is the output shaft of the engine, which is the driving shaft in the case of an automobile, by means of a fixing means. In the case of automobiles, there is often a friction plate that rotates together with the second shaft, which is the input shaft of the transmission and the driven shaft, and a friction plate that is movable in the axial direction relative to the reaction force plate and rotates together with it. a second plate, commonly referred to as a pressure plate, permanently presses the pressure plate against the reaction plate while being supported by a cover plate for axial clamping between the friction plate, the reaction plate and the pressure plate; A component called a cover grate, which rotates integrally with the reaction plate in cooperation with the elastic means and is axially connected thereto, is included as at least a component in the above-mentioned order in the axial direction.

Today, reaction plates for automobile clutches are usually pre-installed on the shaft end or crankshaft of an automobile engine by the automobile manufacturer, and there are many fixing means used for this purpose. In the case of 9, the cover plate, pressure plate and elastic means involved are constituted by a plurality of screws regularly distributed circumferentially around the axis of the assembly in question, and the associated cover plate, pressure plate and elastic means are of specialized manufacture. They are assembled separately by a trader and then assembled as a whole to form an integral assembly commonly referred to as a clutch mechanism.
Car manufacturers have to do this by installing a friction plate between the reaction plate and the pressure plate, and then attaching it to the reaction plate with screws.

It is also necessary to ensure dynamic equilibrium.

In the case of automobile assemblers, this applies to reaction plates, and in the case of specialized clutch manufacturers, to clutch mechanisms that are to be attached to such reaction plates or, if necessary, to friction plates.

An RK in which a residual unbalance to the reaction plate and/or clutch mechanism remains within the punch tolerance limits will restore equilibrium after marking the position of the unbalance by combining the pressure plate and the attached clutch mechanism. It is necessary to assemble the two according to a certain relative angle-constant amount suitable for

In some cases, after this kind of assembly, the car manufacturer will
In order to keep the unbalance at that point within the punch capacity limit,
Perform the final equilibration operation.

Therefore, the clutch installation work is usually done at this point.
The reaction plate of this type of clutch is fixed to the crankshaft of the engine, and the clutch mechanism is fixed after interposing the friction plate to the reaction plate.Secondly, at least once, it is often necessary to It is necessary to perform two equilibration operations.

French Patent No. 1413803 dated February 2, 1965
No. 89 and Patent of Addition No. 89 dated November 18, 1965.
In the device presented in No. 060, the reaction plate is pre-integrated with a cover plate, and the corresponding clutch, already assembled, is mounted on the shaft end of the engine, which cover plate is provided with an additional truncated conical extension. a groove in the form of an axial truncated conical hole suitable for engagement with a truncated conical extension, the truncated conical extension being provided at the shaft end for this purpose.

When an automobile assembly plant receives such a latch, it simply attaches it to the engine shaft or crankshaft, and fixes the entire thing together with other necessary parts using a single fixing screw arranged in the axial direction. That's fine.

This type of screw is screwed into the clutch from the outside.

Therefore, the installation of the fixing screw is carried out independently of the installation of the clutch, which not only may lead to inconvenient errors on the part of the operator responsible for this installation, but also to the effective selection of the screws to be installed. , installation of this type of screw requires special handling.

U.S. Pat. No. 2,599,461, which is essentially directed to a fluid coupling device f, discloses a surface of the reaction plate facing towards the pressure plate around a central opening provided axially in the reaction plate. a reaction plate attached to the output shaft of such a fluid coupling device by a center fixing screw, each having a shouldered head supported on the plate and a threaded drum extending across the reaction plate through the central opening; The clutch happens to be shown.

In this type of clutch, the only fixing screw used is therefore screwed in from the inside with respect to the clutch.

However, the U.S. Pat. No. 2,599,461 in question does not indicate at all the procedure by which the installation of this fixing screw is actually carried out, and judging from the explanation given in that patent, its tightening is performed on its shouldered head. carried out along the periphery,
Therefore, it must be assumed that this is done before the corresponding clutch mechanism is attached to the relevant reaction plate.

Moreover, since the clutch concerned also belongs to an assembly containing fluid coupling elements, and this assembly is housed as a whole in one independent case, the assembly of this assembly and therefore also the clutch Assembly is also carried out at specialized manufacturing plants, where the assembly is attached to the end of the engine shaft using a plurality of fixing screws distributed circumferentially around the shaft of the assembly. I can't help but think that this is something that needs to be done.

The present invention generally applies to @ of a vehicle engine in a vehicle assembly plant.
It is intended for an arrangement which has the character of minimizing the operations that must be carried out in order to install the clutch at the end, and which additionally has other advantages.

More specifically, the object of the present invention is to provide a first plate, called a reaction plate or a flywheel, which is integrated with a first shaft forming a driving shaft by means of a fixing means, and a second plate which is integrated with a second shaft forming a driven shaft. a rotating friction plate; a second plate movable axially relative to the reaction plate and rotating integrally therewith, called a pressure plate;
integrated with the reaction plate in cooperation with elastic means which permanently press the pressure plate towards the reaction plate while being supported by the cover plate to clamp the friction plate axially between the reaction plate and the pressure plate; A clutch, in particular for a motor vehicle, of the type comprising at least as a constituent part, in the above-mentioned order, a part rotating thereon and axially connected thereto, called a cover plate;
The fastening means associated with the reaction plate are axially arranged in a single
a fixed screw having a shouldered head supported in the face of the reaction plate facing towards the pressure plate around a central opening provided axially in the reaction plate; a threaded drum extending across the reaction plate through the central opening, and providing centering means between the reaction plate and the single fixing screw associated therewith. Features.

Due to the presence of this kind of release means, the radial position of the reaction plate and the fixing screw in relation to the axis of the assembly is determined by the fixing screw f, the fixing screw f, and the f& permanently fixed.

Therefore, in a factory specializing in clutch manufacturing, it is possible to finally ensure the dynamic equilibrium of the clutch after the fixation described above.
In this case, it is not necessarily or ultimately necessary to carry out any dynamic balancing operations for this clutch in the automobile assembly plant.

This is advantageous, since fewer operations have to be carried out in the automobile assembly plant in order to mount the clutch on the shaft end of the engine.

In fact, according to the invention, these operations are advantageously reduced to just one fixing operation, which advantageously requires the manipulation of only one fixing screw. .

Further, according to the present invention, it is advantageous that the fixing screw is provided in advance on the clutch to be fixed.

The clutch according to the invention is thus characterized in that the clutch as a whole forms an integral assembly to be mounted on one shaft and that the reaction plate thereof pre-includes an associated fixing screw.

There is no room for error in the selection of this fixing screw; the only action required is the application of a tool to actuate this fixing screw.

However, since the fixing screws are already in place, this application is easy and can be easily mechanized if desired.

1, it is advantageous when the present invention is followed to reduce to a minimum the expense required to mount the clutch on the shaft end of the engine in the vehicle assembly plant.

BRIEF DESCRIPTION OF THE DRAWINGS The features and advantages of the invention will become especially apparent from the description given below by way of example with reference to the accompanying drawings.

The clutch according to the invention is generally shown in the accompanying drawings, in which the first shaft is shown schematically in dashed lines in FIGS. 2 and 3 and in FIGS. 1
1. A first plate 10, commonly called a reaction plate or flywheel, which is integrated by a fixing means to be described later in FIG. 1, and a second shaft (
(not shown) and a reaction plate 10 that rotates together with the friction plate 12 and the reaction force plate 10.
A second plate 13, called a pressure plate, is mounted movably in the axial direction and rotates integrally with the plate, and a friction plate 12
The pressure plate 1 is supported by the cover plate 14 in order to tighten it in the axial direction between the pressure plate 13 and the reaction plate 10.
3 towards the reaction plate 10, rotating integrally with the reaction plate and connected axially thereto, at least as a constituent part 14, called a cover plate. , in the above-mentioned order in the axial direction in a manner known per se.

In practice, shaft 11 is a kind of drive shaft.

When dealing with automobile clutches, the problem is the engine shaft or crankshaft of this type of vehicle.

In the embodiment shown in FIGS. 1 to 4, the reaction plate 1 of the clutch to be attached to the end of the drive shaft 11
0 consists of two parts. The first part of which is a kind of support flange 16, which has an annular arrangement and whose inner periphery makes it possible to mount an assembly at the end of the drive shaft, here the crankshaft, according to the arrangement described below. and is provided on its outer periphery with teeth 17 suitable for forming the starter rim normally associated with reaction plates of this type. The second part is also a reaction plate 18 in the original sense having an annular arrangement, and a friction plate 12 is attached to the reaction plate 18 in the original sense.
cooperate. This reaction plate 18Vi is supported in the axial direction at several locations on the support flange 16 by extending clasps 20 at a certain distance from and parallel to the support flange 16, and
It is fixed to this support flange 16 both axially and rotationally by means of fixing means to be described below.

The cover plate 14 is likewise an annular arrangement and has a radially outwardly directed edge 22 on its outer periphery for fixing it to the reaction plate 10;
4 rotates together with the reaction plate 10 and is connected thereto in the axial direction.

In the embodiment shown in FIGS. 1 to 4, this radial direction #122 of the cover plate 14 is
It is divided into three sections regularly distributed along the circumference.

Furthermore, in this embodiment, the fastening means for fixing the cover plate 14 to the reaction plate 10 consist of rivets 23 which are likewise associated with the image component of this reaction plate 10.

In other words, the two fastening means themselves also ensure the interconnection of the image components of the reaction plate 10.

Furthermore, an ignition target 24 with teeth 25 is provided, which in the embodiment shown in FIGS. are arranged between the reaction plate 10 and the cover plate 140 and the radial edge 22, and are thus integrated into the assembly by the same rivets 23 as described above.

In the embodiments shown in FIGS. 1 to 4, the collar 26 of the ignition target 9t 24 is attached to the cover plate 14.
Alternating with sections of the 0 radial edge 22, it has several notches 27 on its inner circumference.

Pressure plates 13, likewise of an annular arrangement, are mounted in a manner known per se on the side wall of the grate between the sections of the radial edge 22 of the cover plate 14, radially outwardly at each point. The pressure plate 13 has a foot 28 which radially crosses the side wall of the cover plate 14 through a notch 29, by means of which the pressure plate 13 is connected by a rivet 30 to an elastically deformable ear 31 consisting of two plates. However, these ears extend approximately tangentially (extending) with respect to the periphery of the assembly, and at the other end are secured to the cover plate 1 by means of rivets 32.
The sections of the radial edges 22 of 4 and 9 are connected to the reaction plate 10, and the rivets 32 eventually form elastically deformable ears 3.
1 and sections of the radial edge 22 of the cover plate 14 as well as the radial collar 26 of the ignition target 24.
and relates to the reaction force plate 18 of the reaction force plate 10 in its original meaning.

In this way, the pressure plate 13 rotates integrally with the reaction plate 10 while being movable in the axial direction.

In the embodiment shown, the elastic means acting on the pressure plate 13 consist of an annular part 34, called a diaphragm, with a peripheral part forming a Belleville washer 35 and a central part divided into radial fingers 36.

The diaphragm 34, by means of its peripheral portion forming a Belleville washer 35, connects to the cover plate 1 via an annular ridge 37 projecting from the cover plate 14 and provided in the axial direction.
4 and is further supported on the pressure plate 13 via an annular 7 flange 38 which likewise projects on the pressure plate 13 in the axial direction and is optionally divided in the circumferential direction.

The diaphragm 34 is subjected to the action of a clutch push bearing 400, shown in phantom in FIGS. 2, 3 and 6, by the distal ends of its radial fingers 36.

In the embodiment shown here, the object is a clutch push bearing suitable for acting in tension, in other words in the opposite direction on the reaction plate 10, as schematically indicated by the arrow F in FIG. The diameter of the circumference formed by the annular ridge 37 of the p1 cover plate 14 is larger than the diameter of the circumference formed by the flange of the pressure plate 13.

In FIGS. 2, 3 and 6, the friction plate 12 is only outlined in thin lines.

This type of friction plate is known per se and does not form part of the present invention, so it will not be described in detail here.

Similarly, in a manner known per se, the drive @
The fastening means associated with the reaction plate 10 to enable mounting of the clutch assembly on the clutch assembly 11 include only one fastening screw 42 . This fixing screw 42 is arranged in the axial direction and is supported on the surface 44 of the support flange 160 constituting the reaction force plate 16 around a central opening 45 provided in the support flange 16 in the axial direction. Shouldered head 43 and support flange 16f of reaction plate 10 through said central opening 45 for cooperating with a tapped hole 48 provided axially at the tip of drive shaft 11: transversely threaded drum 46 and has.

In these illustrated embodiments, only one fixing screw 42 is supported directly by its shouldered head 43 in the support flange 16 of the reaction plate 10.

According to the invention, centering means are provided between the reaction plate 10 and the only identification screw 42 associated therewith.

In the embodiment shown, this centering means has a cylindrical support surface 49, with which the fixing screw 42 is connected to the central opening 45 of the smooth friction reaction plate 10, and this cylindrical support Although the surface 49 is radially recessed compared to the shouldered head 43, this is actually achieved by extending it on its side.

The axial length of the cylindrical recess surface 49 of the fixing screw 42 corresponds to the axial play that the fixing screw 42 has in this case inside the clutch before it hits the boss of the friction plate 12 as shown in FIG. d, temporarily υ during handling of the clutch prior to its installation, the central opening 4 of the reaction plate 10
It is particularly preferred that the locking screw 42 is sufficient to prevent the fixing screw 42 from being deflected from the central opening 45 even if it is slid axially into the central opening 45 .

In practice, it is sufficient for the axial length to have an axial play of 6 or more.

On the one hand, the axial length L of the cylindrical contact surface 49 of the fixing screw 420 is equal to the thickness E which the support flange 16 of the reaction plate 10 exhibits at the position of the central opening 45 of a length at least equal to the axial clearance d. It is particularly preferable that the

In the axial direction the fixing screw 42 has its shouldered head 43
The embodiment shown on the side shows a longitudinal cutout 50 which is a blind hole-like cutout. This hollowed out part 5
0, there is at least one planar slope 51 parallel to the axis of the fixing screw 42.

In the illustrated embodiment, six planar slopes 51 are provided which are regularly distributed in the circumferential direction, and the longitudinal cutout 50 thus constitutes a cutout with six planar surfaces.

A longitudinal cutout 50 in the fixing screw 42, which is easily understood, allows manipulation of the fixing screw 42 with the aid of some tool 53 of complementary shape, as shown in phantom in FIG.

As shown in the figure, it is particularly preferable that the pot size lateral dimension D1 of the longitudinally-directed slotted portion 50 of the fixing screw 42 is smaller than the diameter 02 of the groove-moving direction hole of the friction plate 12. This is so that the fixing screw 42 can be reached by crossing the groove, and the drive shaft 1 can be removed after the assembly of the component parts of this clutch, including the friction plate 12, is assembled.
1. As a result, according to the invention, this assembly is carried out entirely in a factory specializing in clutches, and in this way the clutch is an integral part to be mounted on the drive shaft 11. The fixing screw 42 associated with the reaction plate 10 of the clutch because it forms an assembly
is prepared in advance in the clutch.

The centering means provided between the fixing screw 42 and the reaction plate 10 prevents any undesired radial movement by keeping the fixing screw in the axis of the assembly, making it easy for clutch manufacturers to The dynamic balancing operation performed by hand is deterministic, and any fixing screws 42 that would interfere with this balancing are
No inappropriate radial movement of

Therefore, no dynamic balancing operation is required in the automobile assembly plant.

Therefore, the only operation that the automobile assembly plant is responsible for is to completely fix the clutch to the drive shaft 11, and the fixing screw 42 necessary for this identification is prepared in advance, and it has already been properly positioned with respect to the assembly. Because I'm being hurt,
This fixing is quick and easy and can easily be mechanized if necessary, and the tools 53 necessary for its implementation can be automatically controlled for this purpose.

%, this fixation is carried out by tightening the threaded drum 460 of the screw at its elastic limit, since the shouldered head 43 of the fixing screw 42 is directly supported on the support 7 of the reaction plate 1o. is preferable.

In this way, good tightening stress is guaranteed, in principle without the need to use any nut lockers.

However, if it is necessary to further improve the locking properties of the fixing screw 42, the fixing screw 42 and the reaction plate 10 may be
An adhesive can be used between the support 7 flange 16 and/or the drive shaft 11.

In reality, the clutch is connected to the ignition targut 2 as shown in the diagram.
4, it is necessary to determine the angle with respect to the drive shaft 11 to which this clutch is attached.

In the embodiment shown in FIGS. 1 to 3, this indexing is partially carried out by the support flange 1 constituting the reaction plate 1o.
Utilizes only one indexing pin 55 which respectively engages in a complementary borehole 56 of 6 and partly in a similarly complementary housing 57 provided for this purpose at the end of the drive shaft 11. It will be done as follows.

However, in this mode of implementation, the centering of the clutch with respect to the drive shaft 11 takes place primarily via the fixing screw 42, which is therefore provided with a supplementary screw provided for this purpose in the drive @ 11, as shown in FIG. The cylindrical support surface 58 includes a cylindrical support surface 58 that is smoothly frictionally connected to a cylindrical support surface 59 .

Of course, the torque transmitted from the drive@11 to the clutch is
Indexing bin 55 (!- except for the fixing screw 42).

This single fixing screw 42 thus performs a double fixing of the axial immobilization of the clutch and the torque transmission.

In the variants shown in FIGS. 5 and 6, the centering of the clutch with respect to the drive Nil is performed using a plurality of (three in FIG. 5) centering bins 55' regularly distributed along the circumference. .

Therefore, in this case, there is no centering support surface between the identification screw 42 and the drive shaft 11.

The other arrangements are also the same as above, even if they are shifted by b.

In the embodiment shown in FIG. 7, a cylindrical support surface 60 suitable for centering the clutch with respect to the drive shaft 11 is provided on this drive shaft 11, and this cylindrical support surface 601C of the drive shaft 11 is connected. The reaction force plate 10 has its central opening 45
to the cylindrical support surface 61 disposed in the radial direction with respect to the
At least partially engages said cylindrical support surface 6o.

It goes without saying that the invention is not limited to the embodiments described and illustrated above, but encompasses alternative embodiments and/or combinations of various elements thereof.

In particular, the centering of the associated circular screw with respect to the reaction plate can be effected in a manner other than by means of a cylindrical support surface of the body of this fastening screw which is connected to the cylindrical support m) of the reaction plate. For example, this reaction plate 10i can be provided with a shouldered head of a fixing screw connected at its outer periphery and with an annular force in a smooth frictional node fully protruding, and as a variant, the reaction plate 10 , may be provided with a plurality of projecting pawls regularly distributed around the axis of the assembly, each pawl engaging in a smooth frictional manner into the bore of the shouldered head of the fixing screw.

Finally, the scope of application of the present invention is not limited to simple clutches consisting of only one friction plate and only one pressure plate, but multiple clutches, in other words multiple friction plates and multiple pressure plates. 0 which can also be extended to clutches containing anti-plates or either of them in the axial direction

[Brief explanation of the drawing]

FIG. 1 is a partially cut-away plan view of a clutch according to the invention along arrow U in FIG. 2; Figures 2 and 3 represent the polygonal lines ■-■ in Figure 1, respectively.
, and O which is an axial cross-sectional view along -m. FIG. 4 is a detailed view of FIG. 5 and tjl'6 are partial views similar to FIGS. 1 and 2, respectively, for the actual flow variant. FIG. 7 is a detailed view of a portion of FIG. This relates to an implementation variant of . DESCRIPTION OF SYMBOLS 10...Reaction force plate, 11... Drive shaft, 12... Friction reaction, 13... Pressure plate, 14... Cover plate, 3
4...Diaphragm, 42...Fixing screw, 43...
・Shoulder head, 45... Center opening, 46... Threaded drum

Claims (9)

[Claims] (1) A first plate (10), called a nine-reaction force plate or flywheel, which is integrated with a first shaft (11) forming a driving shaft by means of a fixing means, and a second plate (10) which is integrated with a second shaft forming a driven shaft. a friction plate (12) which rotates, a 20th plate (13) which is movable in the axial direction with respect to the reaction plate (10) and rotates together with it and is called a pressure plate, and a friction plate (12). The board (10, 13
) for tightening in the axial direction between ) (1
The pressure plate (13) is supported by the reaction plate (10) while being supported by the reaction plate (10).
) rotates integrally with the reaction plate (10) and is axially connected thereto with a part (14) called force/4-grate. Clutches, in particular for motor vehicles, of the type comprising at least as constituent parts axially and in the above-mentioned sequence, the fastening means associated with the reaction plate (10) comprising only one axially arranged fastening screw ( 42) of the reaction plate (10) facing towards the pressure plate (13) at the turn of a central opening (45) provided axially in the reaction plate (10). a shouldered head (43) supported on a surface and a threaded V-ram (
46), characterized in that centering means are provided between the reaction plate (10) and the associated fixing screw (42). (2) The core extraction means moves the fixing screw (42) to the reaction plate (1).
2. Clutch according to claim 1, characterized in that it is constituted by the presence of a cylindrical support surface (49) for smooth frictional connection to the central opening (45) of the clutch. (3) The axial length of the cylindrical supporting surface (49) of the fixing screw (42) is long enough to prevent the screw from deviating from the center opening (45) of the reaction plate (10). The clutch according to claim 2, characterized in that: (4) Make sure that the axial length L of the cylindrical support surface (49) of the fixing screw (42) exceeds its thickness E in the direction perpendicular to the central opening (45) of the first reaction plate (10). A clutch according to claim 3, characterized in that: (5) A longitudinal cutout (50), for example a blind hole, in which the fixing screw (42) comprises, for its operation, at least one planar bevel (51) parallel to its axis. Claim 1 characterized in that it is provided in the axial direction.
Clutch according to any one of paragraphs 1 to 4. (6) Vertical hollowed out part (50
6. The clutch according to claim 5, wherein the maximum lateral dimension D1 of the friction plate (12) is larger than the diameter D2 of the axial hole of the boss of the friction plate (12). (7) The fixing screws (4
2) The clutch according to any one of claims 1 to 6, characterized in that the clutch includes in advance the above. (8) mounted on one shaft (11) by means of fixing screws (42) associated with the reaction plate (10);
Clutch according to any one of claims 1 to 7, characterized in that the clutch is centered on the 1111 (11). (9) Reaction plate (10) and related shaft (11)
9. A clutch according to claim 8, characterized in that centering pins (55') are provided distributed along the circumference between the centering pins (55'). 01 Clutch according to claim 8, characterized in that the reaction plate (10) is connected by a cylindrical support surface (61) to the cylindrical support surface (60) of the associated shaft (11). . Qll Fixing screw (42) related to reaction plate (10)
Mount it on one of the fixing screws (11) by
Clutch according to any one of claims 1 to 7, characterized in that the clutch is centered on the shaft (11) by 42). (121 fixing screw (42) includes a supporting surface (58),
12. Clutch according to claim 11, characterized in that the fixing screw (42) is thereby connected to a bearing surface (59) of the associated shaft (11).