Device for braking and/or blocking a shaft of a vehicle transmission and method for manufacturing such a device

A vehicle transmission comprising:

• a housing part,
• a shaft extending from the housing part and having an outer circumference,
• a spring element having a plurality of spring windings wound around at least one portion of the outer circumference of the shaft, a first end of the spring element being fixed to the housing part, and
• an actuating means attached to a second end of the spring element and configured to twist the second end in a circumferential direction of the spring element to thereby tighten the spring element and cause the spring element to frictionally contact the at least one portion of the outer circumference of the shaft,
• wherein the spring element is comprised of a hollow cylindrical metal base body having a helical-shaped incision that defines the plurality of spring windings, the incision extending over a predetermined axial length of the base body,
• the spring element has a wear protection coating on at least its radially-inward-facing surface, and
• further comprising a flange-shaped affixing element disposed on at least one axial end portion of the hollow cylindrical base body,
• wherein the affixing element is comprised of the same material as the base body and is integral thereto with no seam therebetween, and
• the flange-shaped affixing element comprises a flange at the first end of the base body and connects the first end of the spring element to the housing and wherein the actuating means comprises an affixing disk attached to the second end of the spring element and an actuator arm hingedly connected to the affixing disk.

A vehicle transmission comprising:

• a housing part,
• a shaft extending from the housing part and having an outer circumference,
• a spring element having a plurality of spring windings wound around at least one portion of the outer circumference of the shaft, a first end of the spring element being fixed to the housing part, and
• an actuator arm attached to a second end of the spring element and configured to twist the second end of the spring element in a circumferential direction about the shaft and cause the spring element to frictionally contact the at least one portion of the outer circumference of the shaft,
• wherein the spring element comprises a hollow cylindrical metal base body having a helical-shaped incision that defines the plurality of spring windings, the incision extending over a predetermined axial length of the base body, and
• the spring element has a wear protection coating on at least its radially-inward-facing surface, and
• including an affixing disk, wherein the second end of the spring element is affixed to the affixing disk and the actuator arm is affixed to the affixing disk, and
• wherein the actuator arm is hingedly connected to the affixing disk.