Valve timing controller with a stopper

Abstract

A valve timing controller is disclosed that includes first and second rotating elements, and a phase changing mechanism including arm members coupling the first and second rotating elements. The valve timing controller also includes a cam plate and a stopper to restrict rotation of the cam plate. A concave part where the stopper and the cam plate contact. Also, a damper chamber is defined between the concave part and one of the stopper and the cam plate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other objects, features, and advantages of the present invention will become more apparent from the following detailed description made with reference to the accompanying drawings, in which like portions are designated by like reference numbers and in which:

FIG. 1 is a cross sectional view of one embodiment of a valve timing controller taken on line I-I of FIG. 3;

FIG. 2A is a cross sectional view of the valve timing controller taken on line II-II of FIG. 3;

FIG. 2B is a cross sectional view of an enlarged portion of FIG. 2A;

FIG. 3 is a cross sectional view of one embodiment of the valve timing controller;

FIG. 4 is a cross sectional view of the valve timing controller taken on line IV-IV of FIG. 3;

FIG. 5 is a cross sectional view of the valve timing controller taken on the line V-V of FIG. 3;

FIG. 6 is a cross sectional view of the valve timing controller taken on line VI-VI of FIG. 3;

FIG. 7 is a cross sectional view of the valve timing controller of FIG. 2A in an operating state of the valve timing controller;

FIG. 8 is an enlarged partial cross sectional view of FIG. 7; and

FIG. 9 is a cross sectional view of another embodiment of the valve timing controller.

Claims

1. A valve timing controller disposed in a drive system which transmits torque of a drive shaft to a driven shaft for opening and closing of a valve to control opening and closing of the valve, the valve timing controller comprising: a first rotating element which rotates in association with the drive shaft;a second rotating element which rotates in association with the driven shaft;a phase changing mechanism part including arm members for coupling to the first rotating element and the second rotating element by a revolute pair to change a relative rotational phase between the first rotating element and the second rotating element caused by motion of the revolute pair of the arm members;a cam plate disposed at one of the first rotating element and the second rotating element so as to be rotated integrally therewith to be coupled to the arm members by the revolute pair; anda stopper disposed in the other of the first rotating element and the second rotating element to restrict a rotational angle of the cam plate in a predetermined range, wherein a changing angle of the relative rotational phase between the first rotating element and the second rotating element is defined by contacting the cam plate to the stopper, wherein:a concave part having a bottom is disposed at one of the stopper and the cam plate and formed in a contact face part where the stopper and the cam plate contact such that the other is inserted into the concave part; anda damper chamber is defined between the concave part and the other of the stopper and the cam plate.

2. A valve timing controller according to claim 1, wherein: the other is provided with a convex part which slides in the concave part.

3. A valve timing controller according to claim 1, wherein: an operating fluid is reserved in the other rotating element and is supplied to the stopper.

4. A valve timing controller according to claim 2, wherein: an operating fluid is reserved in a part of the other rotating element and is reserved to the stopper in a state when the first rotating element and the second rotating element are rotating by rotational force of the drive shaft.

5. A valve timing controller according to claim 1, wherein: the stopper is located in an outer peripheral part of the other rotating element.

6. A valve timing controller according to claim 3, further comprising: an operating fluid supply path for supplying the operating fluid to the other rotating element.

7. A valve timing controller according to claim 6, wherein: the operating fluid supply path is provided with an operating fluid passage at least one set constituting a revolute pair with each other among the arm member, the cam plate, the first rotating element, and the second rotating element so as to be connected to an engagement part between a shaft part and a bore part disposed in each of the two members as the one set constituting the revolute pair.

8. A valve timing controller according to claim 7, wherein: at least one of the two members is provided with a circular groove for guiding the operating fluid at an outer edge part of one of the shaft part and the bore part in at least one of the two members and the operating oil passage is connected to the engagement part through the circular groove.

9. A valve timing controller according to claim 1, wherein: a communicating passage is provided in either one of contact face parts on which the stopper and the cam plate contact for communication between the damper chamber and an outside.

10. A valve timing controller according to claim 1, further comprising: a control unit which controls a motion of the revolute pair of the arm members.

11. A valve timing controller according to claim 10, wherein: the control unit includes an electric motor for generating rotational torque for the motion of the revolute pair.