Scroll vacuum pump and method for producing a scroll vacuum pump

A scroll vacuum pump, comprising:

• a pump system that comprises a stationary spiral component and a movable spiral component cooperating with said stationary spiral component in a pump-active manner;
• a drive shaft that rotates about an axis of rotation during operation and that has an eccentric section for driving the movable spiral component;
• and
• an electric drive motor for the drive shaft,
• wherein the movable spiral component comprises a spiral arrangement, which has spiral walls, spiral grooves bounded by said spiral walls and a spiral base forming the base of said spiral grooves, and a support for the spiral arrangement, said support cooperating with the eccentric section of the drive shaft,
• wherein the stationary spiral component comprises a spiral arrangement, which has spiral walls and a spiral base, and a support for the spiral arrangement, and
• wherein at least one spiral wall has a reduced thickness at a free end section, said reduced thickness being smaller than the thickness of a section of the spiral wall that is arranged upstream of the free end section and that merges into the free end section.

A method for manufacturing one of a scroll vacuum pump, a stationary spiral component, and a movable spiral component, the scroll vacuum pump comprising

• a pump system that comprises the stationary spiral component and the movable spiral component cooperating with said stationary spiral component in a pump-active manner;
• a drive shaft that rotates about an axis of rotation during operation and that has an eccentric section for driving the movable spiral component;
• and
• an electric drive motor for the drive shaft,
• wherein the movable spiral component comprises a spiral arrangement, which has spiral walls, spiral grooves bounded by said spiral walls, and a spiral base forming the base of said spiral grooves, and a support for the spiral arrangement, said support cooperating with the eccentric section of the drive shaft,
• wherein the stationary spiral component comprises a spiral arrangement, which has spiral walls and a spiral base, and a support for the spiral arrangement, and
• wherein at least one spiral wall includes:
• a reduced thickness at a free end section, said reduced thickness being smaller than the thickness of a section of the spiral wall that is arranged upstream of the free end section and that merges into the free end section, or
• a recess at the free end section at a radial outer side and/or at a radial inner side of the spiral wall, the recess being relative to the section of the spiral wall that is arranged upstream of the free end section and that merges into the free end section, the method comprising:
• producing the spiral wall by a chip-forming machining via a machine tool that has a rotating tool that is pressed during the machining against the radial inner side or against the radial outer side of the spiral wall to be produced.

A scroll vacuum pump, comprising:

• a pump system that comprises a stationary spiral component and a movable spiral component cooperating with said stationary spiral component in a pump-active manner;
• a drive shaft that rotates about an axis of rotation during operation and that has an eccentric section for driving the movable spiral component;
• and
• an electric drive motor for the drive shaft,
• wherein the movable spiral component comprises a spiral arrangement, which has spiral walls, spiral grooves bounded by said spiral walls, and a spiral base forming the base of said spiral grooves, and a support for the spiral arrangement, said support cooperating with the eccentric section of the drive shaft,
• wherein the stationary spiral component comprises a spiral arrangement, which has spiral walls and a spiral base, and a support for the spiral arrangement, and
• wherein at least one spiral wall has a free end section that has, at a radial outer side and/or at a radial inner side of the spiral wall, a recess relative to a section of the spiral wall that is arranged upstream of the free end section and that merges into the free end section.