US 9,328,758 B2Granted

Tooth-set carrier and opening cylinder with quick-locking mechanism

AssigneeRieter Ingolstadt GmbH

InventorsJosef Schermer, Mathias Burchert

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Abstract

The invention refers to an opening cylinder for an open-end spinning device with a core piece and a tooth-set carrier capable of rotating around a common rotating axis and detachably connected to one another by means of a quick-locking mechanism. The quick-locking mechanism is executed as a turn-lock fastener, so that the tooth-set carrier is detachably connected to it by means of a rotational movement around the rotational axis relative to the core piece.

Claims15

Dependent claims

An opening cylinder for an open-end spinning machine, comprising:

a cylindrical core piece fixable to a distal end of a drive shaft, the core piece comprising a circumferential wall having an outer surface having a front end and a rear end, a frontward facing annular face disposed adjacent to and radially projecting from the rear end of the outer surface defining a friction surface, a radially-extending projection disposed adjacent to the front end of the outer surface having a circumferentially-facing surface defining a first contact surface;
a cylindrical tooth-set carrier detachably connected to the core piece such that the tooth-set carrier and the core piece rotate relative to a common rotational axis, the tooth-set carrier comprising a circumferential wall concentrically received on the circumferential wall of the core piece and having an inner surface having a front end and a rear end, at least one connecting element radially-inwardly extending from the inner surface adjacent to the front end, the rear end having an annular face defining a friction surface complementary to the friction surface of the core piece, the connecting element comprising a shoulder formed in a first flank of the connecting element having a circumferentially-facing surface defining a first contact surface complementary to the contact surface of the core piece;
and
an annular spring element concentrically disposed on the front end of the outer surface of the core piece, the spring element comprising at least one radially-outwardly extending spring-loaded leg having a free end configured to engage a respective connecting element on the tooth-set carrier, when the core piece is concentrically received within the tooth-set carrier, upon relative rotation between the tooth-set carrier and the core piece, wherein rotational engagement of the spring element and the connecting element draws the core piece and the tooth-set carrier axially towards each other to axially and circumferentially lock the tooth-set carrier to the core piece;
the friction surfaces of the core piece and the tooth-set carrier being drawn against one another in an axial direction by engagement of the spring-loaded leg and the connecting element to form a force-fitting connection in an operational rotational direction of the opening cylinder that transmits torque to the tooth set carrier;
and
the first contact surfaces of tooth-set carrier and the core piece being drawn against one another in the operational rotational direction by the rotational engagement of spring element and the connecting element to form a positive locking connection in the circumferential direction between the tooth-set carrier and the core piece against relative rotation in a direction opposite to the operational rotational direction.

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Dependencies are inferred from the claim text.

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Abstract

An opening cylinder for an open-end spinning machine, comprising:

a cylindrical core piece fixable to a distal end of a drive shaft, the core piece comprising a circumferential wall having an outer surface having a front end and a rear end, a frontward facing annular face disposed adjacent to and radially projecting from the rear end of the outer surface defining a friction surface, a radially-extending projection disposed adjacent to the front end of the outer surface having a circumferentially-facing surface defining a first contact surface;
a cylindrical tooth-set carrier detachably connected to the core piece such that the tooth-set carrier and the core piece rotate relative to a common rotational axis, the tooth-set carrier comprising a circumferential wall concentrically received on the circumferential wall of the core piece and having an inner surface having a front end and a rear end, at least one connecting element radially-inwardly extending from the inner surface adjacent to the front end, the rear end having an annular face defining a friction surface complementary to the friction surface of the core piece, the connecting element comprising a shoulder formed in a first flank of the connecting element having a circumferentially-facing surface defining a first contact surface complementary to the contact surface of the core piece;
and
an annular spring element concentrically disposed on the front end of the outer surface of the core piece, the spring element comprising at least one radially-outwardly extending spring-loaded leg having a free end configured to engage a respective connecting element on the tooth-set carrier, when the core piece is concentrically received within the tooth-set carrier, upon relative rotation between the tooth-set carrier and the core piece, wherein rotational engagement of the spring element and the connecting element draws the core piece and the tooth-set carrier axially towards each other to axially and circumferentially lock the tooth-set carrier to the core piece;
the friction surfaces of the core piece and the tooth-set carrier being drawn against one another in an axial direction by engagement of the spring-loaded leg and the connecting element to form a force-fitting connection in an operational rotational direction of the opening cylinder that transmits torque to the tooth set carrier;
and
the first contact surfaces of tooth-set carrier and the core piece being drawn against one another in the operational rotational direction by the rotational engagement of spring element and the connecting element to form a positive locking connection in the circumferential direction between the tooth-set carrier and the core piece against relative rotation in a direction opposite to the operational rotational direction.

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