JPH0150769B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a clutch device incorporated between a drive disc and a transmission, which comprises a clutch casing fixed to the drive disc, and a clutch device installed in the clutch casing that is connected to the transmission. at least one clutch disc connected to a driven shaft communicating with the clutch casing; at least one pressure plate inside the clutch casing; acting on the pressure plate to drive the clutch disc via the pressure plate; It comprises at least one clutch spring device which presses against a clutch surface which is non-rotatably arranged on the disc and a disconnection lever which has an active part on which a disconnection bearing acts and which is pivotably mounted on the clutch casing. The active part is made of a wear-resistant material, such as porcelain/ceramic or sintered material, and is of the type that is pivotably arranged relative to the shut-off lever.

In this way, the active part of the shut-off lever is made of a wear-resistant material, such as porcelain/ceramic or sintered material, and the working part is pivotable relative to the shut-off lever. As a result, the service life of the clutch device can be significantly extended, and the manufacturing tolerances of the disconnection lever can be increased.

The object of the invention is to ensure that the pivoting movement of the active part relative to the cut-off lever is carried out satisfactorily, so that the service life of the clutch device is further extended, and that a two-part cut-off lever can be manufactured simply. It is.

The configuration of the present invention for achieving this object is as described in claim 1.

With the arrangement of the invention, the pivoting movement of the active part takes place without any problems. No special pivot bearing mechanism is required for the active part. Moreover, the cutoff lever body can be easily manufactured using inexpensive materials and with large manufacturing tolerances. For example, the cutoff lever can be manufactured by punching, pressing, or drawing a thin metal plate.

Claims 2 to 6 describe advantageous embodiments of the invention.

The configuration of the present invention will be specifically explained below with reference to the drawings.

In FIG. 1, a clutch casing 1 is attached to a drive disk 12 connected to a crankshaft 10 of an internal combustion engine.
4 is fixed, and this clutch casing 1
4 consists of an outer shell 16 and a cover 18, inside which a first clutch disc 20 and a second clutch disc 22 are located. The first clutch disc 20 is non-rotatably and axially movable,
While attached to the first driven shaft 24, the second clutch disc 22 is also non-rotatably and axially movable on the second driven shaft 28.
is attached to. The first driven shaft 24 leads to the transmission 26, while the second driven shaft 28 is configured as a hollow shaft and surrounds the first driven shaft 24 and is connected to a pair of Gear 30, 3
2 to a power take-off device 34.
A first pressure plate 36 and a second pressure plate 38 are provided between the two clutch discs 20 and 22, and a clutch spring arrangement 40 is provided between these pressure plates.
At the same time as the first pressure plate 36 is pressed against the first clutch plate 20 and the first clutch disc 20 is pressed against the clutch surface 42 of the drive disc 12, a frictional connection is created. The second pressure plate 38 is pressed against the second clutch disc 22 and the second clutch disc 22 is pressed against the clutch surface 44 of the cover 18 to create a frictional connection. In this state, both clutch discs 20 and 22 are rotated by the drive disc 12, thereby causing the driven shaft 2
4 and 28 are driven.

A first
The first group of cutoff levers 46 and the second group of cutoff levers 4
8 is provided.

The cutoff lever 46 has a first cutoff lever bearing 50
The cut-off lever 48 is mounted on the clutch casing 14 by means of a second cut-off lever bearing 52, while the cut-off lever 48 is mounted on the clutch casing 14 by means of a second cut-off lever bearing 52. Shutoff levers 46 and 4 for both groups
8 is a working portion 5 at the inner end in the radial direction.
4 and acting on these active parts 54, the isolation bearing 56 is movable in the axial direction of the clutch device, and has a non-rotatable bearing part 58 connected to the shifting device, The bearing part 60 is rotatable relative to the bearing part 60. The bearing part 60 acts directly on the active part 54. The cut-off bearing 56 is moved towards the left as seen in FIG. 1, and the rotatable bearing part 6
0 presses on the active part 54, the cut-off levers 46 and 48 are caused to pivot, and the pivoting movement of the cut-off lever 46 is transmitted via the pull bolt 62 to the first pressure plate 36. is pulled away from the first clutch disc 20, and the pivoting movement of the cut-off lever 48 is transmitted via the push bolt 64 to the second pressure plate 38, which in turn moves away from the second clutch disc 20. It is pushed away from the plate 22.

Although the clutch device described above is a double clutch, it is easy to change it to a double clutch. That is, in this case both clutch discs 20 and 22 are mounted axially movably and non-rotatably on the first driven shaft 24, the second driven shaft 28 is removed and both clutch discs 2
0 and 22 transmit the torque of the drive disk 12 exclusively to the first driven shaft 24 and thus to the transmission 26.

Figures 3 and 4 show details of the cut-off lever.
The first group of cutoff levers 46 and the second group of cutoff levers 48 are both made by drawing thin metal sheets, and their radially inner ends are constructed in the same manner. A support recess 68 is formed directly in the. Into the support recess 68 is inserted an active part 54 made of a wear-resistant material, such as porcelain/ceramic or sintered material. Working part 54
has a convex support surface 72 curved to match the concave support surface 74 of the support recess 68 , and has a generatrix 70 of the support surface 74 of the support recess 68 .
(which is perpendicular to the drawing plane and extends tangentially with respect to the axis of rotation of the clutch device), which is perfectly capable of pivoting movements about an axis (not shown) parallel to the axis of rotation of the clutch device. The support surface 72 of the active part 54 is thereby connected to the support surface 74 of the support recess 68.
can move along. The active portion 54 is pressed against a support surface 74 of the support recess 68 by a leaf spring 76. Leaf spring 76
is connected to the shutoff lever 46 or 48 by the rivet 78.
is fixed to the slit 80 of the working part 54.
engaged within. The working surface 82 on the front side of the working portion 54 is curved convexly about the generatrix 70 at the position shown in FIG. Rolling the active part 54 between the support surface 74 and the bearing part 60 therefore allows the radial position of the working part 54 relative to the bearing part 60 to be adjusted.

By the way, the cutoff lever bearing 50 that supports the first group of cutoff levers 46 on the clutch casing 14
To explain, as you can see from Figure 2,
The disconnection lever 46 has webs 88 that are substantially parallel to each other and to the clutch axis and that are provided with rectangular cutouts 90 (FIG. 3).
is formed. In these notches 90 square heads 92 of bearing pins 94 engage. The cylindrical section 96 of the bearing pin 94 fits into the hole 98 formed in the bearing rib 100 of the cover 18.
and is rotatably supported. The head 92 is in contact with the bearing rib 100, and is held in this state by a stop member 102, which will be described later.

To explain the operating portion of the cutoff lever 46 relative to the first pressure plate 36, as can be seen from FIG. A curved portion 104 is formed in the third
As seen in the figure, it is curved to the right to be convex and to the left to be concave. Pull the bolt 62 through the through hole 106 formed in the range of this curved portion 104.
passes through it, and this draw bolt 62 also passes through the first pressure plate 36 and is supported thereon by a head 108 at the left end as viewed in FIG. The right end of the draw bolt 62 has a thread 11.
0 is provided and a locking nut 112 is screwed on. The retaining nut 112 is connected to the curved portion 104 via the retaining member 102 as a washer member.
After the position of the locking nut 112 is adjusted, the collar 114 is deformed so as to come into close contact with the flat part 116 of the tension bolt 62, and the locking nut is 112 is prevented from rotating. Stopping member 102
prevents the bearing pin 94 from coming out of the hole 98, as seen in FIG.

An elastic crimping device 118 is inserted between the concave side of the curved part 104 and the first pressure plate 36 and consists of a pressure helical spring 120 surrounding the tension bolt 62 and a pressure sleeve 122. The push sleeve 122 is tapered at its right end as viewed in FIG. 3 and engages the concave surface of the curved portion 104. By this crimping device 118, the cutoff lever 4
The radially outer end of 6 is always fitted with a locking nut 11
2, so that even if the clutch rotates and a centrifugal force acts on the disconnection lever 46, or if the clutch is removed and the disconnection lever 46 is grasped by hand, the disconnection lever 46 The position of is unchanged.

As can be seen from FIG. 4, the cut-off lever bearing 52 of the second group of cut-off levers 48
It is constructed in the same way as the cut-off lever bearing 50 of , and corresponding parts are designated with a dot.

To explain the operating portion of the cutoff lever 48 for the second pressure plate 38, as can be seen from FIG. The head 131 of the push bolt 64 engages the projection 132 of the second pressure plate 38. To prevent rotation of the push bolt 64, a locking nut 134 with a collar 136 serves, which collar 136 is deformed so as to fit tightly against a flat surface 138 of the push bolt 64. A locking element 102' for the bearing pin 94' (FIG. 2) and a curved spring 140 are screwed between the locking nut 134 and the blocking lever 48. The free end of the curved spring 140 is connected to the second pressure plate 3
8 and serves to pivot the disconnection lever 48 about the disconnection lever bearing 52 in a clockwise direction as viewed in FIG. 48 push bolts 6
The head 131 of No. 4 is pressed against the protrusion 132 by spring force. Furthermore, a pocket 144 is formed in the cover 18 in the area of the head 131. For example, in an assembly plant, when a worker attempts to lift the clutch by grasping the cutoff lever 48 with his/her hand, the cutoff lever 48 is pivoted counterclockwise as seen in FIG. 131 hits the bottom of the pocket 144, preventing damage to the cutoff lever mechanism.

Clutch discs 20 and 22 are provided with porcelain friction linings 148. These friction linings 148 may be attached directly to the clutch discs or may be riveted using retaining members 150.

The clutch spring device 40, which is arranged between the pressure plates 36 and 38, is designed as a disc spring, as shown in FIGS. 3-5. Details of this disk spring are shown in FIG. The disk spring is connected to the pressure plate 3 by means of radially inwardly directed tongues 152.
6 ribs 154. That is, a protrusion 156 is formed on the tongue 152, and the convex side of the protrusion 156 is supported by the rib 154. Furthermore, an annular raised portion 1 is provided on the outer peripheral edge of the disc spring.
58 is formed, and the convex side thereof is the pressure plate 38.
It is supported by ribs 160 of. Raised portion 156,
By providing 158 in the disc spring (clutch spring device 40), precision machining or machining itself of the pressure plates 36 and 38 can be omitted.

In FIG. 5, the disk spring is fastened to the pressure plate 36 by at least two slit pins 162, the slit pins 162 being inserted into holes 164 in the pressure plate 36, and the two slit pins 162 inserted into the holes 164 of the disk spring. It engages within the space between the two tongues 152.

In contrast, in FIG. 7, the disk spring is centered by at least two bends 166. These bent portions 166 are the tongue-like portions 1
52 and the hole 16 of the pressure plate 36
4.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of the clutch device, Fig. 2 is a schematic diagram of the clutch device.
Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a view seen in the direction of the arrow in the figure.
5 is a sectional view taken along the - line of FIG. 2, FIG. 6 is a partial plan view of the disc spring, and FIG. 7 is a disc spring different from FIG. FIG. 3 is a partial cross-sectional view showing a weave centering type. 10... Crankshaft, 12... Drive disk, 14
...Clutch casing, 16...Outlet, 18
...Cover, 20 and 22...Clutch disc, 2
4... Driven shaft, 26... Transmission, 28... Driven shaft, 30 and 32... Gear, 34... Power extraction device, 36 and 38... Pressure plate, 40... Clutch spring device, 42 and 44...clutch surface,
46 and 48... cutoff lever, 50 and 52...
Shutoff lever bearing, 54... Working part, 56...
Shutoff bearings, 58 and 60...Bearing portion, 62
...Pull bolt, 64...Push bolt, 68...
Support recess, 70... Bus bar, 72 and 74... Support surface, 76... Leaf spring, 78... Rivet, 80...
...slit, 82... working surface, 88... web,
90...notch, 92...head, 94...bearing pin, 96...division, 98...hole, 100...
... Bearing rib, 102 ... Stopping member, 104 ...
Curved portion, 106...through hole, 108...head,
110... Screw thread, 112... Locking nut, 11
4...Collar, 116...Plane part, 118...Crimping device, 120...Press coil spring, 122...
Push sleeve, 126...Threaded thread, 128...Threaded hole, 130...Cylindrical portion, 131...Head, 1
32... protrusion, 134... retaining nut, 136...
... Collar, 138 ... Plane part, 140 ... Curved spring, 142 ... Circumferential surface, 144 ... Pocket, 1
48...Friction lining, 150...Holding member,
152...tongue, 154...rib, 156 and 158...ridge, 160...rib, 162...
Slit pin, 164... hole, 166... bent portion.

Claims (1)

[Scope of Claims] 1. A clutch device installed between a drive disc and a transmission, which includes a clutch casing fixed to the drive disc and a cover located inside the clutch casing and communicating with the transmission. at least one clutch disc coupled to the drive shaft; at least one pressure plate inside the clutch casing; and acting on the pressure plate to rotate the clutch disc into the clutch casing or the drive disc through the pressure plate. comprising at least one clutch spring device which presses against a permanently disposed clutch surface, and a disconnection lever having an active part on which a disconnection bearing acts and which is pivotably mounted on the clutch casing;
The active part is made of a wear-resistant material and, in the type in which it is arranged pivotably relative to the cut-off lever, each cut-off lever 46,4.
8 has on its side facing the cut-off bearing 56 a concave support surface 74 by which a convex support surface 72 of the active part 54 is supported, and both support surfaces 74, 72 A clutch device characterized in that the clutches are capable of pivotal movement relative to each other while in contact with each other. 2. Clutch device according to claim 1, wherein the concave support surface 74 is of partially cylindrical design, the axis of which extends transversely to the axis of rotation of the clutch. 3. A clutch device according to claim 2, wherein the active portion 54 is of the same length in the circumferential direction of the clutch as the concave support surface 74. 4 Leaf springs 76 are attached to the cutoff levers 46 and 48, respectively.
3. A clutch device according to claim 3, wherein a leaf spring is mounted with a pre-spring force which brings the convex support surface 72 of the active part 54 into contact with the concave support surface 74 of the disconnection lever. . 5. Clutch device according to claim 4, in which the active part 54 has a slit 80 which is open towards the cut-off bearing, and a leaf spring 76 acts on the bottom of this slit. 6. A leaf spring 76 extends radially with respect to the clutch axis and in the direction of the center line of the disconnection levers 46, 48 and has a width corresponding to the width of the slit 80 in the active part 54, the slit 80 being part 5
6. The clutch device of claim 5, wherein the clutch device is disposed approximately along the center line of the clutch.