Motorised robot for cleaning swimming pools or the like, which operates submerged in a fluid, comprising: - moving means of the robot of wheel type, brush type, or caterpillar type, comprising a contact surface with a movement surface submerged in the said swimming pool or the like, - means for generating, by way of the robot, a circulation of the fluid in which the robot is submerged, comprising: - an opening for the suction of said fluid, - an opening for the backflow of the aspirated fluid, - a conduit of fluid connecting the suction and backflow openings, - generating means of a flow of said fluid in said conduit, - a strut for lifting from the movement surface at least a part of said contact surface of the moving means, said strut being mobile at least between the two following positions: - a first position, referred to as the inactive position, in which said strut is retracted into the interior of the robot, said contact surface of the moving means then being capable of coming in contact in its entirety with said movement surface, - a second position, referred to as the active position, in which said strut projects past said contact surface of the moving means, in such a way that part of this contact surface can no longer be in contact with the movement surface, characterised in that said robot further comprises controlling means of the movement of said strut, activated by a movement of the fluid in the said conduit of fluid, said controlling means of the movement of the said strut between its active and inactive positions, comprising opposition means of the movement of the fluid in the conduit of fluid, which are mobile in said conduit in such a way as to at least partially block the conduit of fluid or release it, and connected to the strut in such a way that, according to the position adopted in the conduit of fluid by the said opposition means, the strut takes on its active or inactive position. - moving means of the robot of wheel type, brush type, or caterpillar type, comprising a contact surface with a movement surface submerged in the said swimming pool or the like, - means for generating, by way of the robot, a circulation of the fluid in which the robot is submerged, comprising: - an opening for the suction of said fluid, - an opening for the backflow of the aspirated fluid, - a conduit of fluid connecting the suction and backflow openings, - generating means of a flow of said fluid in said conduit, - an opening for the suction of said fluid, - an opening for the backflow of the aspirated fluid, - a conduit of fluid connecting the suction and backflow openings, - generating means of a flow of said fluid in said conduit, - a strut for lifting from the movement surface at least a part of said contact surface of the moving means, said strut being mobile at least between the two following positions: - a first position, referred to as the inactive position, in which said strut is retracted into the interior of the robot, said contact surface of the moving means then being capable of coming in contact in its entirety with said movement surface, - a second position, referred to as the active position, in which said strut projects past said contact surface of the moving means, in such a way that part of this contact surface can no longer be in contact with the movement surface, - a first position, referred to as the inactive position, in which said strut is retracted into the interior of the robot, said contact surface of the moving means then being capable of coming in contact in its entirety with said movement surface, - a second position, referred to as the active position, in which said strut projects past said contact surface of the moving means, in such a way that part of this contact surface can no longer be in contact with the movement surface,