US 12,012,876 B2Granted

Cam phase adjuster

AssigneeSchaeffler Technologies AG & Co. KG

InventorsQiwei Qian, Baoyu Jian, Wenping Guo

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Abstract

The present disclosure relates to a cam phase adjuster that includes a stator, a rotor, a front cover and at least one locking pin. The cam phase adjuster is provided with a plurality of compartments formed between the rotor and the stator, and each compartment is divided into advance cavities and retard cavities in a circumferential direction; each locking pin is mounted in a corresponding mounting hole of the rotor; an end portion of each locking pin that faces away from the front cover abuts against the bottom of the corresponding mounting hole by means of a corresponding elastic reset member; an end face of the front cover that faces the rotor is provided with at least one locking groove which matches the at least one locking pin; the end portion of each locking pin that faces the front cover can be axially inserted into the corresponding locking groove; and the front cover is provided with an unlocking flow channel which fluidly connects the corresponding locking groove to one advance cavity or retard cavity.

Claims20

Dependent claims

A cam phase adjuster, comprising:

a stator,
a rotor rotatably mounted on a radial inner side of the stator,
a front cover fixed to an axial end of the stator, and
at least one locking pin,
a plurality of compartments formed between the rotor and the stator, the rotor being provided with a plurality of blades respectively extending radially into the plurality of compartments, thereby dividing each of the plurality of compartments into an advance cavity and a retard cavity in a circumferential direction, and
the at least one locking pin mounted in a corresponding mounting hole of the rotor, an end portion of the at least one locking pin facing away from the front cover abutting against a bottom of the corresponding mounting hole by a corresponding elastic reset member, and
an end face of the front cover facing the rotor having at least one locking groove configured to receive the at least one locking pin, and an end portion of each one of the at least one locking pin facing the front cover configured to be axially inserted into at least one of the at least one locking groove,
wherein,
the front cover includes unlocking flow channels that fluidly connect the at least one locking groove to one advance cavity and one retard cavity, so that the at least one locking pin can be pushed to axially move away from the front cover by a hydraulic fluid from the one advance cavity and the one retard cavity.

6 more elements

A cam phase adjuster, comprising:

a stator,
a rotor rotatably mounted within the stator, the rotor forming a plurality of circumferentially spaced compartments with the stator, and each compartment of the plurality of circumferentially spaced compartments divided into an advance cavity and a retard cavity via a radially extending blade of the rotor,
a front cover fixed to an axial end of the stator, and
a first locking pin and a second locking pin disposed within a respective first mounting hole and a respective second mounting hole of the rotor, the first locking pin and the second locking pin configured to be axially displaced to lock the rotor to the stator, and
an end face of the front cover facing the rotor having:
a first locking groove configured to:
receive at least one of the first locking pin or the second locking pin, and
fluidly connect to a first advance cavity of a first compartment of the plurality of circumferentially space compartments, and
a second locking groove separate and circumferentially spaced from the first locking groove, the second locking groove configured to:
receive at least one of the first locking pin or the second locking pin, and
fluidly connect to a first retard cavity of the first compartment, and
in a first locked position of the rotor, the first locking pin is aligned and inserted into a first end of the first locking groove and the second locking pin is aligned and inserted into a second end of the first locking groove so that the rotor is locked in a retard position, and
in a second locked position of the rotor, the first locking pin is aligned and inserted into the second end of the first locking groove and the second locking pin is aligned and inserted into a first end of the second locking groove so that the rotor is locked in an intermediate position, and
in a third locked position of the rotor, the first locking pin is aligned and inserted into the first end of the second locking groove and the second locking pin is aligned and inserted into a second end of the second locking groove so that the rotor is locked in an advance position.

11 more elements

A cam phase adjuster, comprising:

a stator,
a rotor rotatably mounted within the stator, the rotor forming a plurality of circumferentially spaced compartments with the stator, and each compartment of the plurality of circumferentially spaced compartments divided into an advance cavity and a retard cavity via a radially extending blade of the rotor,
a front cover fixed to an axial end of the stator, and
a first locking pin and a second locking pin disposed within a respective first mounting hole and a respective second mounting hole of the rotor, the first locking pin and the second locking pin configured to be axially displaced to lock the rotor to the stator, and
an end face of the front cover facing the rotor having:
a first locking groove configured to:
receive at least one of the first locking pin or the second locking pin,
fluidly connect to a first advance cavity of a first compartment of the plurality of circumferentially spaced compartment via displacement of the first locking pin, and
fluidly connect to a second compartment separate and circumferentially spaced from the first compartment, and
a second locking groove separate and circumferentially spaced apart from the first locking groove, the second locking groove configured to:
receive at least one of the first locking pin or the second locking pin,
fluidly connect to a first retard cavity of the first compartment via displacement of the second locking pin, and
fluidly connect to a third compartment separate and circumferentially spaced from the first compartment, and
in a first locked position of the rotor, the first locking pin is inserted into the first locking groove and the second locking pin is inserted into the first locking groove so that the rotor is locked in a retard position, and
in a second locked position of the rotor, the first locking pin is inserted into the first locking groove and the second locking pin is inserted into the second locking groove so that the rotor is locked in an intermediate position, and
in a third locked position of the rotor, the first locking pin is inserted into the second locking groove and the second locking pin is inserted into the second locking groove so that the rotor is locked in an advance position.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/021,918Filed 20 Aug 2020
Published: US 2023/0349306 A12 Nov 2023
Granted: 18 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F01L 1/3442
Changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear: using hydraulic chambers with variable volume to…
F01L 2001/34459
Locking means between driving and driven members: locking in multiple positions
F01L 2001/34463
Locking means between driving and driven members: locking position intermediate between most retarded and most advanced positions
F01L 2001/34466
Locking means between driving and driven members: with multiple locking devices