Grounding apparatus having an air passage, and electrical drive assembly having the grounding apparatus

A grounding apparatus for conducting an electrical charge and/or voltage from a rotor of an electric motor via a shaft as a first grounding partner to a second grounding partner, the grounding apparatus comprising:

• a supporting body device having a connecting section configured for electrical and mechanical connection to one of the first or second grounding partners, and the supporting body device having a supporting section;
• a contacting device having a contacting section configured for electrical connection to an other of the first or second grounding partners, the contacting device having an attachment section, the contacting device being connected to the supporting section of the supporting body device via the attachment section;
• wherein the grounding apparatus is configured to bridge an annular gap between the first and the second grounding partners, and wherein the supporting body device is configured as a clamping sleeve which is configured to be arranged on a bearing ring to connect the contacting device electrically and mechanically to the bearing ring via a clamp joint;
• and
• at least one opening, which forms or helps to form an air passage in the annular gap.