Valve timing controller

Abstract

A valve timing controller is provided with a first rotary element including a first gear part, a second rotary element including a second gear part, and a third rotary element including a third gear part and a fourth gear part. The third gear part and the fourth gear part are meshed respectively with the first gear part and the second gear part. A stopper is provided so as to extend in the first rotary element in the radial direction for regulating a relative rotational phase shift angle between the first rotary element and the second rotary element. An interposing assembler is provided on the second rotary element for rotatably interposing the stoppers in an axial direction.

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 section showing a valve timing controller according to a first embodiment of the present invention;

FIG. 2 is a cross sectional view of the valve timing controller taken along a line II-II in FIG. 1;

FIG. 3 is a cross sectional view of the valve timing controller taken along a line III-III in FIG. 1;

FIG. 4 is a cross sectional view showing the valve timing controller taken along a line IV-IV in FIG. 1;

FIG. 5 is a cross section view showing the valve timing taken along a line V-V in FIG. 1;

FIG. 6 is a side elevation view showing the valve timing controller;

FIG. 7 is a partial cross section showing a valve timing controller according to a second embodiment of the present invention;

FIG. 8 is a cross section showing a valve timing controller according to a third embodiment of the present invention;

FIG. 9 is a cross section showing a valve timing controller according to a fourth embodiment of the present invention;

FIG. 10 is a cross section showing a valve timing controller according to a fifth embodiment of the present invention;

FIG. 11 is a cross-sectional schematic view for explaining a characteristic portion of the valve timing controller according to the fifth embodiment of the present invention;

FIG. 12 is a cross section showing a valve timing controller according to another embodiment of the present invention;

FIG. 13 is a cross section showing a valve timing controller according to another embodiment of the present invention; and

FIG. 14 is a cross section showing a valve timing controller according to another embodiment of the present invention.

Claims

1. A valve timing controller for controlling a valve timing of at least one of an intake valve and an exhaust valve which is opened/closed by a camshaft by torque transmitted from a crankshaft, comprising: a first rotary element including a first gear part for rotating in response to one of the crankshaft and the camshaft;a second rotary element including a second gear part neighboring to the first gear part in the axial direction for rotating in response to the other of the crankshaft and the camshaft;a third rotary element including a third gear part and a fourth gear part, the third gear part and the fourth gear part being meshed respectively with the first gear part and the second gear part and performing a planetary motion to vary a relative rotational phase between the first rotary element and the second rotary element;a stopper radially extending in one rotary element of the first rotary element and the second rotary element for regulating a relative rotational phase shift angle between the first rotary element and the second rotary element; andan interposing assembler provided either at the other rotary element or between the other rotary element and the third rotary element for rotatably interposing the stopper of the one rotary element in the axial direction.

2. A valve timing controller according to claim 1, wherein the stopper circularly extends inside of the interposing assembler along the relative rotational direction.

3. A valve timing controller according to claim 1, wherein a plurality of the stoppers are arranged in the interposing assembler over the circumferential direction.

4. A valve timing controller according to claim 3, wherein: the plurality of the stoppers are arranged at equal intervals over the entire circumference in the relative rotational direction.

5. A valve timing controller according to claim 1, wherein the interposing assembler has a thrust groove extending in the circumferential direction along with the relative rotational direction of the stopper.

6. A valve timing controller according to claim 5, wherein a plurality of sets of the thrust grooves and the stoppers are provided.

7. A valve timing controller according to claim 5, wherein the interposing assembler includes a dividing rotary element which divides the other rotary element into two pieces in the axial direction; andthe thrust groove is defined by two end surfaces of the dividing rotary element opposing with each other.

8. A valve timing controller according to claim 7, wherein a clearance adjusting member is provided between the end surfaces to be interposed between either one of the end surfaces and the stopper.

9. A valve timing controller according to claim 5, wherein the thrust groove is open so as to extend in the circumferential direction along an inner wall of the other rotary element.

10. A valve timing controller according to claim 5, wherein the interposing assembler is formed of the other rotary element and the third rotary element; and the stopper is interposed in the axial direction between the third rotary element and the end surface at the opposite side of the third rotary element out of the end surfaces of the thrust groove in a state where the stopper is accommodated into the thrust groove.

11. A valve timing controller according to claim 1, wherein the third rotary element is a planetary gear accommodated between the first rotary element and the second rotary element.

12. A valve timing controller according to claim 11, wherein an axial movement of the stopper is regulated by any one of an axial end surface of the gear part provided on the other rotary element, an axial end surface of either one of the third gear part and the fourth gear part of the third rotary element, and an extension part extending between the third gear part and the fourth gear part.

13. A valve timing controller for controlling a valve timing of at least one of an intake valve and an exhaust valve which is opened/closed by a camshaft by torque transmitted from a crankshaft, comprising: a first rotary element including a first gear part for rotating in response to one of the crankshaft and the camshaft;a second rotary element including a second gear part neighboring to the first gear part in the axial direction for rotating in response to the other of the crankshaft and the camshaft; anda third rotary element including a third gear part and a fourth gear part, the third gear part and the fourth gear part being meshed respectively with the first gear part and the second gear part and performing a planetary motion to vary a relative rotational phase between the first rotary element and the second rotary element;a stopper provided so as to radially extend in one rotary element of the first rotary element and the second rotary element for regulating a relative rotational phase shift angle between the first rotary element and the second rotary element; andan interposing assembler provided at the other rotary element of the first rotary element and the second rotary element for rotatably interposing the stopper of the one rotary element in the axial direction.

14. A valve timing controller according to claim 13, wherein: the interposing assembler includes a dividing rotary element which divides the other rotary element into two pieces in the axial direction and integrates them into one piece and a thrust groove defined by two end surfaces of the dividing rotary element opposing with each other; andthe thrust groove interposes the stopper in the axial direction.

15. A valve timing controller for controlling a valve timing of at least one,of an intake valve and an exhaust valve which is opened/closed by a camshaft by torque transmitted from a crankshaft, comprising: a first rotary element including a first gear part for rotating in response to one of the crankshaft and the camshaft;a second rotary element including a second gear part neighboring to the first gear part in the axial direction for rotating in response to the other of the crankshaft and the camshaft; anda third rotary element including a third gear part and a fourth gear part, the third gear part and the fourth gear part being meshed respectively with the first gear part and the second gear part and performing a planetary motion to vary a relative rotational phase between the first rotary element and the second rotary element;a stopper radially extending in one rotary element of the first rotary element and the second rotary element for regulating a relative rotational phase shift angle between the first rotary element and the second rotary element; andan interposing assembler structured by the other rotary element of the first rotary element and the second rotary element and the third rotary element for rotatably interposing the stopper of the one rotary element in the axial direction

16. A valve timing controller according to claim 15, wherein: the interposing assembler includes a dividing rotary element which divides the other rotary element into two pieces in the axial direction and integrates them into one piece and a thrust groove defined by two end surfaces of the dividing rotary element opposing with each other; andthe interposing assembler interposes the stopper in the axial direction between the third rotary element and the end surface of the thrust groove in a state where the stopper is accommodated in the thrust groove.

17. A valve timing controller for controlling a valve timing of at least one of an intake valve and an exhaust valve which is opened/closed by a camshaft by torque transmitted from a crankshaft, comprising: a first rotary element including a first gear part for rotating in response to the camshaft;a second rotary element including a second gear part for rotating in response to the crankshaft; anda planetary rotary element including a third gear part and a fourth gear part, the third gear part and the fourth gear part being meshed respectively with the first gear part and the second gear part and performing a planetary motion to vary a relative rotational phase between the first rotary element and the second rotary element;the first rotary element or the second rotary element rotatably contacts with the end surface in the axial direction of at least one of the third gear part and the fourth gear part.

18. A valve timing controller for adjusting a valve timing of at least one of an intake valve or an exhaust valve which is opened/closed by a camshaft by torque transmitted from a crankshaft, comprising: a first rotary element including a first gear part for rotating in synchronization with the camshaft,a second rotary element including a second gear part for rotating in response to the crankshaft,a planetary rotary element including a third gear part and a fourth gear part, the third gear part and the fourth gear part being meshed respectively with the first gear part and the second gear part and performing a planetary motion to vary a relative rotational phase between the first rotary element and the second rotary element; anda planetary frame for supporting the planetary rotary element in such a manner as to perform the planetary motion at the inner periphery side of both of a first center and a second center, in a case that a tooth bearing center with the first gear part and the third gear part in the axial direction is made as a first center, and a tooth bearing center with the second gear part and the fourth gear part in the axial direction is made as a second center.

19. A valve timing controller according to claim 18, wherein: the planetary frame supports the planetary rotary element on a projection line in the radial direction of the first center and on a projection line in the radial direction of the second center.

20. A valve timing controller according to claim 18, wherein: the first rotary element or the second rotary element rotatably contacts with an end surface in the axial direction of at least one of the third gear part and the fourth gear part.

21. A valve timing controller according to claim 17, wherein the planetary rotary element includes a planetary gear part forming the third gear part and the fourth gear part, and a bearing of which an outer race is fixed to the inner periphery side of the planetary gear, and of which an inner race is engaged with the outer periphery side of the planetary frame.