Valve timing controller, lock jig for valve timing controller, and production method of valve timing controller

Patent metadata

Field	Value
Publication number	US-9856761-B2
Application number	US-201615083781-A
Country	US
Kind code	B2
Filing date	Mar 29, 2016
Priority date	Apr 7, 2015
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A valve timing controller includes a first housing; a second housing fixed to the first housing; a driven rotor inside of a driving rotor defined by the first housing and the second housing; a revolving actuator disposed on an extension of an axial direction of the driven rotor; a deceleration mechanism; and an engaging part that is engaged with a lock jig locking a relative rotation between the driving rotor and an input rotor of the deceleration mechanism in advance of assembling the valve timing controller to an internal-combustion engine. The engaging part is located on a radially inner side compared with an insertion part of the revolving actuator inserted in a hole of a cover component of the internal-combustion engine.

First claim

What is claimed is:

1. A valve timing controller that controls valve timing of a valve opened and closed by a camshaft using a torque transferred from a crankshaft in an internal-combustion engine, the valve timing controller comprising:
a first housing rotating with one of the crankshaft and the camshaft;
a second housing fixed to the first housing;
a driven rotor fixed to an end portion of the other of the crankshaft and the camshaft inside of a driving rotor defined by the first housing and the second housing;
a revolving actuator disposed on an extension of an axial direction of the driven rotor;
a deceleration mechanism which slows down and converts a relative rotation of the revolving actuator to the driving rotor into a relative rotation of the driven rotor to the driving rotor; and
an engaging part that is engaged with a lock jig locking a relative rotation between the driving rotor and an input rotor of the deceleration mechanism in advance of assembling the valve timing controller to the internal-combustion engine, wherein
the engaging part is located on a radially inner side compared with an insertion part of the revolving actuator inserted in a hole of a cover component of the internal-combustion engine.

2. The valve timing controller according to claim 1 , wherein
the engaging part is a part of a fastening component which fastens the first housing and the second housing.

3. The valve timing controller according to claim 2 , wherein
the deceleration mechanism has
an annular gear formed integrally with the second housing,
the input rotor rotateable around an axial center of the annular gear, the input rotor having an eccentric part eccentric to the axial center, the input rotor being connected with the revolving actuator,
a planetary gear engaged with the annular gear and supported by the eccentric part to be rotateable around an eccentric center, the planetary gear rotating on an own axis around the eccentric center and revolving around the axial center when the input rotor rotates around the axial center, and
a transmitting portion that transmits rotation of the planetary gear to the driven rotor, and

the fastening component is located at a same position as a tooth point part of the annular gear in a circumferential direction.

4. The valve timing controller according to claim 1 , wherein
the engaging part is one of a plurality of engaging parts arranged in a circumferential direction with non-regular intervals.

5. A lock jig for a valve timing controller that controls valve timing of a valve opened and closed by a camshaft using a torque transferred from a crankshaft in an internal-combustion engine, and that includes: a first housing rotating with one of the crankshaft and the camshaft; a second housing fixed to the first housing; a driven rotor fixed to an end portion of the other of the crankshaft and the camshaft inside of a driving rotor defined by the first housing and the second housing; a revolving actuator disposed on an extension of an axial direction of the driven rotor; a deceleration mechanism which slows down and converts a relative rotation of the revolving actuator to the driving rotor into a relative rotation of the driven rotor to the driving rotor; and an engaging part located on a radially inner side compared with an insertion part of the revolving actuator inserted in a hole of a cover component of the internal-combustion engine, the lock jig locking a relative rotation between the driving rotor and an input rotor of the deceleration mechanism in advance of assembling the valve timing controller to the internal-combustion engine, the lock jig comprising:
a first fitting part that is engaged with the input rotor in a circumferential direction;
a second fitting part that is engaged with the engaging part in a circumferential direction; and
a connecting part which connects the first fitting part and the second fitting part, wherein
a size of the lock jig in a radial direction is smaller than that of the insertion part.

6. The lock jig according to claim 5 , wherein
the engaging part is a part of a fastening component which fastens the first housing and the second housing.

7. The lock jig according to claim 5 , wherein
the input rotor has two fit portions extending in the axial direction,
the first fitting part of the lock jig has two projections projected from the connecting part, and
the lock jig is attached to the input rotor by inserting the two projections into the two fit portions respectively in a state where tip end parts of the two projections are elastically deformed to approach to each other.

8. The lock jig according to claim 5 , wherein
the deceleration mechanism,
an annular gear formed integrally with the second housing,
the input rotor rotateable around an axial center of the annular gear, the input rotor having an eccentric part eccentric to the axial center, the input rotor being connected with the revolving actuator,
a planetary gear engaged with the annular gear and supported by the eccentric part to be rotateable around an eccentric center, the planetary gear rotating on an own axis around the eccentric center and revolving around the axial center when the input rotor rotates around the axial center, and
a transmitting portion that transmits rotation of the planetary gear to the driven rotor,

the input rotor has an eccentric direction mark indicating an eccentric direction of the eccentric part, and
the connecting part is made of a translucent material so that the eccentric direction mark is recognized.

9. A production method of a valve timing controller that controls valve timing of a valve opened and closed by a camshaft using a torque transferred from a crankshaft in an internal-combustion engine, and that includes: a first housing rotating with one of the crankshaft and the camshaft; a second housing fixed to the first housing; a driven rotor fixed to an end portion of the other of the crankshaft and the camshaft inside of a driving rotor defined by the first housing and the second housing; a revolving actuator disposed on an extension of an axial direction of the driven rotor; a deceleration mechanism which slows down and converts a relative rotation of the revolving actuator to the driving rotor into a relative rotation of the driven rotor to the driving rotor; and an engaging part located on a radially inner side compared with an insertion part of the revolving actuator inserted in a hole of a cover component of the internal-combustion engine, the production method comprising:
assembling the first housing, the second housing, the driven rotor, and the deceleration mechanism;
locking a relative rotation between the driving rotor and an input rotor of the deceleration mechanism by using a lock jig after the assembling, a size of the lock jig being smaller than that of the insertion part in a radial direction;
connecting the first housing to one of the crankshaft and the camshaft and connecting the driven rotor to the other of the crankshaft and the camshaft after the locking;
attaching the cover component to a main body of the internal-combustion engine after the connecting; and
removing the lock jig from the driving rotor and the input rotor to take out the lock jig outside through the hole of the cover component after the attaching.

10. The production method of the valve timing controller according to claim 9 , wherein
the engaging part is a part of a fastening component which fastens the first housing and the second housing.

Assignees

• Denso Corp

Inventors

• Iwasaki Akira

Classifications

• F01L2820/032

  Electric motors · CPC title

• F01L2303/01

  Tools for producing, mounting or adjusting, e.g. some part of the distribution · CPC title

• F01L1/352 Primary

  using bevel or epicyclic gear · CPC title

• F01L1/022

  Chain drive · CPC title

• F01L2103/01

  Mechanical Engineering · mapped topic