Back to results
US 2014/0174874 A1Published application
Accessory Drive With Friction Clutch And Electric Motor
AssigneeBorgWarner Inc.
InventorShiwei Qin
Life of this patent
Estimating the term…
Abstract
A friction clutch assembly for a vehicle accessory, particularly to drive a vehicle cooling pump, and more particularly as part of a dual mode drive for a cooling pump, together with an electric motor. The friction clutch assembly includes a friction plate member connected to a central rotatable shaft member used for operating the vehicle accessory. A biased armature member is adapted to force a friction plate member with friction linings thereon against a housing or cover which is rotating at input speed. A solenoid assembly is used to overcome the spring bias and pull the armature and friction plate member away from the housing.
Claims34
A friction clutch assembly for a vehicle engine accessory, the accessory having a housing member with a cover member and a solenoid portion, a pulley member attached to the cover member, an internal shaft member which is selectively rotatable for operating the accessory, and a solenoid assembly positioned in the solenoid portion of the housing, said friction clutch assembly comprising:
- an armature member, said armature member made of a magnetic material and capable of axial movement relative to the shaft member when energized by a solenoid assembly;
- said armature member having spring retaining members;
- a friction plate member positioned axially adjacent said armature member;
- friction members positioned on opposite sides of said friction plate member;
- coil spring members positioned on said spring retaining members and biasing said armature member in an axial direction away from the pulley member;
- wherein when said solenoid assembly is actuated, said armature member is pulled axially toward said solenoid member preventing at least one of said firction members from contacting the cover member;
- and
- wherein when said solenoid assembly is not activated, said coil spring members bias said armature member axially against said friction plate member causing one of said friction members to contact said cover member and thereby causing rotation of said internal shaft member and operating said accessory.
5 more elements
A friction clutch assembly for a vehicle coolant pump, said coolant pump having a central shaft member for rotating an impeller, said friction clutch assembly comprising:
- a solenoid assembly comprising a solenoid housing and a solenoid coil member;
- a pulley member rotatable at input speed;
- a housing member attached to said pulley member and rotatable therewith;
- an axially moveable magnetic armature member;
- biasing members for biasing said armature member axially away from said solenoid assembly;
- friction plate member connected to said central shaft member and rotatable therewith;
- a first friction lining member positioned on a first surface of said friction plate member and adjacent said armature member;
- a second friction lining member positioned on a second and opposite surface of said friction plate member and adjacent said housing member;
- and
- a stop member positioned adjacent said friction plate member;
- wherein when said solenoid assembly is not electrically actuated, said biasing members force said armature member and said friction plate member axially in a direction toward said housing member wherein said second friction lining member contacts said housing cover member causing said friction plate member and said central shaft member to rotate at input speed;
- wherein said stop member restricts axial movement of said friction plate member when said solenoid assembly is activated.
9 more elements
A dual mode drive device for a vehicle accessory comprising:
- (a) a housing member;
- (b) rotatable shaft member in said housing for selectively operating said vehicle accessory;
- (c) an electric motor in said housing member for selectively rotating said shaft member and operating said vehicle accessory;
- and
- (d) a friction clutch assembly in said housing member for assisting in selectively operating said vehicle accessory, said friction clutch assembly comprising:
- a solenoid assembly with a solenoid coil member;
- a pulley member rotatable at input speed;
- a housing cover member attached to said pulley member and rotatable therewith;
- an armature member, said armature member made of a magnetic material and capable of axial movement relative to the shaft member when energized by a solenoid assembly;
- said armature member having spring retaining members;
- a friction plate member positioned axially adjacent said armature member;
- friction members positioned on opposite sides of said friction plate member;
- coil spring members positioned on said spring retaining members and biasing said ai mature member in an axial direction away from the pulley member;
- wherein when said solenoid assembly is actuated, said armature member is pulled axially toward said solenoid member preventing at least one of said firction members from contacting the cover member;
- and
- wherein when said solenoid assembly is not activated, said coil spring members bias said armature member axially against said friction plate member causing one of said friction members to contact said cover member and thereby causing rotation of said internal shaft member and operating said accessory.
13 more elements
A dual mode drive device for a vehicle accessory comprising:
- (a) a housing member;
- (b) rotatable shaft member in said housing for selectively operating said vehicle accessory;
- (c) an electric motor in said housing member for selectively rotating said shaft member and operating said vehicle accessory;
- and
- (d) a friction clutch assembly in said housing member for assisting in selectively operating said vehicle accessory, said friction clutch assembly comprising:
- a solenoid assembly with a solenoid coil member;
- a pulley member rotatable at input speed;
- a housing cover member attached to said pulley member and rotatable therewith;
- a solenoid assembly comprising a solenoid housing and a solenoid coil member;
- a pulley member rotatable at input speed;
- a housing member attached to said pulley member and rotatable therewith;
- an axially moveable magnetic armature member;
- biasing members for biasing said armature member axially away from said solenoid assembly;
- friction plate member connected to said central shaft member and rotatable therewith;
- a first friction lining member positioned on a first surface of said friction plate member and adjacent said armature member;
- a second friction lining member positioned on a second and opposite surface of said friction plate member and adjacent said housing member;
- and
- a stop member positioned adjacent said friction plate member;
- wherein when said solenoid assembly is not electrically actuated, said biasing members force said armature member and said friction plate member axially in a direction toward said housing member wherein said second friction lining member contacts said housing cover member causing said friction plate member and said central shaft member to rotate at input speed;
- wherein said stop member restricts axial movement of said friction plate member when said solenoid assembly is activated.
17 more elements
Dependencies are inferred from the claim text.