Mobile cleaning robot with a spacer

A mobile cleaning robot comprising:

• a body including a suction duct;
• and
• a cleaning assembly operable to ingest debris from a surface of an environment, the cleaning assembly comprising:
• a roller rotatable with respect to the body and engageable with the surface to direct debris toward the suction duct, the roller including:
• a roller core extending along a longitudinal axis of the roller;
• a first elongated member circumferentially surrounding a first portion of the roller core;
• a second elongated member circumferentially surrounding a second portion of the roller core;
• and
• a spacer at least partially circumferentially surrounding the roller core between the first elongated member and the second elongated, the spacer engageable with the surface and configured to prevent debris collection between the first elongated member and the second elongated member.

A method of operating a mobile cleaning robot comprising:

• operating a drive wheel of the mobile cleaning robot to navigate the mobile cleaning robot about an environment;
• and
• operating a cleaning assembly to ingest debris from a surface of the environment, to operate the mobile cleaning robot in a cleaning mode, the cleaning assembly including:
• a roller rotatable with respect to a body of the mobile cleaning robot and engageable with the surface to direct debris toward a suction duct, the roller including:
• a roller core extending along a longitudinal axis of the roller;
• a first elongated member circumferentially surrounding a first portion of the roller core;
• a second elongated member circumferentially surrounding a second portion of the roller core;
• and
• a spacer at least partially circumferentially surrounding the roller core between the first elongated member and the second elongated, the spacer engageable with the surface of the environment and configured to prevent debris collection between the first elongated member and the second elongated member.