1. A method of machining a disk for a toroidal-type continuously variable transmission,
the disk including:
a first side surface having a first traction surface and a second flat surface portion; and
a second side surface having a second traction surface and a first flat surface portion, the method of machining the disk comprising:
fixing an annular disk to a core bar having a pair of reference portions for rotation at both ends thereof;
clamping the pair of reference portions by a first center on a main spindle side of a finishing machine and a second center opposing the first center;
abutting a first flat surface portion against a reference for axial abutment attached to the main spindle;
machining a first traction surface while rotating the disk;
unclamping the core bar;
inverting the disk with the disk fixed to the core bar;
clamping the pair of reference portions by the first center and the second center;
abutting a second flat surface portion against the reference for axial abutment; and
machining a second traction surface while rotating the disk.
2. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein a convex and a concave portion are formed on an outer peripheral surface of the disk.
3. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein a collet chuck is used as the core bar.
4. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein the reference portion for rotation is a center hole.
5. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein the reference portion for rotation is a male center.
6. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein a backing plate is used as the reference for axial abutment.
7. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein the abutment between the first flat surface portion and the reference for axial abutment is kept by electromagnetic force.
8. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, wherein the disk is integrally formed.
9. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 1, further comprising:
abutting the first traction surface against a supporting member fixed to a supporting base so as to define a radial position of the disk by the supporting base;
abutting the first flat surface portion against the reference for axial abutment so as to define an axial position of the disk by the reference for axial abutment; and
machining an inner peripheral surface of the disk in a state in which the position of disk is defined in the radial direction and the axial direction.
10. A method of machining a disk for a toroidal-type continuously variable transmission, comprising:
abutting a traction surface formed on one side surface of an annular disk against a supporting member fixed to a supporting base so as to define a radial position of the disk by the supporting base;
abutting a flat surface portion formed on another side surface of the disk against a reference for axial abutment which is fixed to a main spindle of a finishing machine and is rotatively driven so as to define an axial position of the disk by the reference for axial abutment; and
machining an inner peripheral surface of the disk in a state in which the position of disk is defined in the radial direction and the axial direction.
11. The method of machining a disk for a toroidal-type continuously variable transmission according to claim 10, wherein a convex and a concave portion are formed on an outer peripheral surface of the disk.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A circuit for driving an appliance for treating laundry, the circuit comprising:
a motor circuit having an AC motor;
a door-locking circuit connected in parallel to said motor circuit; and
a single common electronic switching element for driving said motor circuit and said door-locking circuit.
2. The circuit according to claim 1, wherein said single common electronic switching element switches on said door-locking circuit when driven, and at least one electromechanical switch interrupts said motor circuit at the same time.
3. The circuit according to claim 1, wherein said single electronic switching element is a triac or a thyristor.
4. The circuit according to claim 1, wherein said door-locking circuit has at least one of a switch or a mechanism for locking an appliance door, and said at least one of a switch or a mechanism are to be driven by a FTC bimetallic element.
5. The circuit according to claim 1, which further comprises two electromechanical switches to be used in said motor circuit and connected to a rotor winding of said AC motor or to a field winding of said AC motor for interrupting said motor circuit in a first switching state and bringing about a reversal of direction of rotation of said AC motor in a second switching state.
6. The circuit according to claim 5, wherein said motor circuit additionally includes a further electromechanical switch relay for field reversal, said further electromechanical switch relay being connected to a winding of said AC motor not connected to said two electromechanical switches.
7. The circuit according to claim 1, wherein said door-locking circuit remains active to keep a door locked when said motor circuit switches off said motor.