192 clutches and power-stop control – Clutch and gear
Reexamination Certificate
2001-02-13
2002-09-17
Rodriguez, Sául (Department: 3681)
192 clutches and power-stop control
Clutch and gear
C192S090000, C192S084600, C192S090000, C192S03000R, C074S100100
Reexamination Certificate
active
06450311
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an automatic operating apparatus for performing the connection and disconnection of a friction clutch for an automatic transmission by converting the rotation of a motor into the axial movement of a piston rod in a hydraulic cylinder.
2. Prior Art
In an automatic transmission, it is known to use an automatic operating apparatus for performing the connection and disconnection of a friction clutch by converting the rotation of a motor into the axial movement of a piston rod in a hydraulic cylinder. Such an automatic operating apparatus for a friction clutch has been disclosed in the Federal Republic of Germany unexamined patent publication No. 4433824.
FIG. 3
is a diagramatic plan view of an automatic operating apparatus for a friction clutch disclosed in the above-described unexamined patent publication. In this automatic clutch operating apparatus
51
, during connecting the friction clutch (not shown) by rotation of a motor
52
, a piston rod
54
is pushed out of a hydraulic cylinder
53
and a crank
56
is rotated. Accordingly, an accumulating means (or spring device)
55
, which is provided rotatably on a casing
57
, is swayed. Further, the accumulating means (or spring device)
55
receives the pushing force of the piston rod
54
through the crank
56
, accumulating the force.
Next, when the motor
52
is driven to rotate in the direction to disconnect the friction clutch, the accumulating means (or spring device)
55
is swayed according to the rotation of the crank
56
. At the same time, the accumulating means (or spring device)
55
applies the accumulated force through the crank
56
to the piston rod
54
, aiding the driving force of the motor
52
and serving to help the disconnecting motion of the friction clutch. Further, the accumulating means
55
is formed in a large size to keep the disconnecting state of the friction clutch when the whole pressure of the friction clutch is large. As described above, in the conventional automatic clutch operating apparatus
51
, the accumulating means (or spring device)
55
is swayed according to the rotation of the crank
56
. Consequently, it is required to consider a space for swaying of the accumulating means, so that there is a question of the whole apparatus becoming large in the size.
SUMMARY OF THE INVENTION
An object of the present invention is to provide an automatic operating apparatus for a friction clutch which apparatus is smaller in the size than the conventional automatic clutch operating apparatus
51
.
The foregoing object is accomplished in an automatic operating apparatus for a friction clutch defined in the following claims.
In the automatic operating apparatus for a friction clutch defined in the following claim
1
, the accumulating means does not sway owing to being provided immovably on the casing of the apparatus. Consequently, there is no need to provide a space for swaying, and the occupied space for the accumulating means may be small. As a result, the automatic operating apparatus for a friction clutch according to the present invention can be constituted in a smaller size as compared to the conventional one.
REFERENCES:
patent: 4828093 (1989-05-01), Bertin et al.
patent: 4852419 (1989-08-01), Kittel et al.
patent: 5065850 (1991-11-01), Bertin et al.
patent: 5135090 (1992-08-01), Bertin et al.
patent: 5680916 (1997-10-01), Borschert
patent: 6026945 (2000-02-01), Imao et al.
patent: 4433824 (1996-03-01), None
Goto Kazuo
Kito Mikihiro
Aichi Kikai Kogyo Kabushiki Kaisha
Dennison, Schultz & Dougherty
Rodríguez Saúl
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