192 clutches and power-stop control – Clutches – Axially engaging
Patent
1989-04-14
1990-08-14
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Axially engaging
192113A, F16D 1372
Patent
active
049479733
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a cooling device for pull type clutch.
BACKGROUND OF THE INVENTION
1. (Prior Art)
In a pull type clutch, such shown in as FIG. 5, an outer fulcrum C1 of a diaphragm spring 8 is supported by a clutch cover 1, an intermediate fulcrum C2 is in contact with a fulcrum land 7a of a pressure plate 7, and an inner fulcrum C3 is engaged with a release bearing 12.
To supply cool air from outside to the pressure plate 7, an air induction body 48 having a plurality of air scoops 49 is provided air is induced to the pressure plate 7 by rotating of the inducing body 48.
However, the induction body 48 is fixed on the pressure plate 7 by means of rivets 41 requiring a plurality of holes 43 in the pressure plate 7 and, at the same time, a plurality of notched seats 40 on the friction face side 7b of the pressure plate 7 and results in a number of disadvantage. The number of steps in the process to manufacture the pressure plate 7 increases, and the edge of the notched seats 40 or the head of the rivets 41 may scratch the facing 6.
2. (Object of the Invention)
The object of the present invention is to solve the above problems by fixing the air induction body to the diaphragm spring.
DISCLOSURE OF THE INVENTION
In order to accomplish the above objects, the clutch of the first embodiment consist of a diaphragm spring having a plurality of slits and enlarged notches at an outer peripheral end of the slits, a clutch cover fixed on a flywheel and connected with an outer fulcrum of the diaphragm spring, a pressure plate movable in an axial direction and connected to a intermediate fulcrum of the diaphragm spring, a release bearing movable in said axial direction and connected to a inner fulcrum of the diaphragm spring for releasing the pressure plate from a clutch disc by pulling the inner fulcrum of the diaphragm spring, a cooling device for clutch, the cooling device comprising a ring portion to induce cool air arranged on a back face of the diaphragm spring, a plurality of air scoops opening toward the rotation side of clutch and formed on the induction body, a plurality of washers arranged on a front face of the diaphragm spring, the washers and the induction body being jointed the each other through the notches of the diaphragm spring, the diaphargm spring being held between said induction body and the washers.
During clutch rotating, the air induction body rotates with the diaphragm spring. Therefore the cool air is scooped from out side (the output side in the axial direction) and is supplied to the pressure plate. The pressure plate is cooled by the cool air.
Moreover, because the induction body is fixed on the diaphragm spring by means of the washers and rivets through the holes of the diaphragm spring, it is not necessary to manufacture any notched seat and/or holes for inserting the rivets therein. Consequently the expenses for manufacturing are reduced. Moreover, because it is not necessary to manufacture any notched seat for the rivets scratching of the facing by the heads of the rivets or the edges of the notched seats is avoided. Therefore, the life of the facing is increased.
In the cooling device of the second embodiment, in addition to the first embodiment, an annular protrusion in contact with the intermediate fulcrum of the diaphragm spring is formed on the induction body, a plurality of protrusions in contact with the intermediate fulcrum of the diaphragm spring are respectively formed on said washers and, the intermediate fulcrum of the diaphragm spring is held between the above protrusions. As a result, the diaphragm spring can move by elastic transformation, and the operation of releasing is smooth.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a longitudinal section view of the pull type clutch provided with the cooling device of the present invention.
FIG. 2 is enlarged view of the main portion in FIG. 1.
FIG. 3 is a section view taken from the direction of the arrow III.
FIG. 4 is a perspective view of the same portion as FIG. 2.
FIG. 5 a longi
REFERENCES:
patent: 4657128 (1987-04-01), Fujito et al.
Bonck Rodney H.
Kabushiki Kaisha Daikin Seisakusho
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