Cleaning machine having joint device and cleaning machine having drive device

A cleaning machine, comprising

• a cleaning head;
• a drive motor for rotary driving at least one cleaning roller and being arranged on the cleaning head;
• a holding rod device;
• and
• a joint device with which the holding rod device is articulated to pivot on the cleaning head;
• wherein arranged on the holding rod device is a connection element that articulates the holding rod device to the cleaning head and that has a first region and a second region;
• wherein the first region and the second region are connected in one piece to one another and the connection element takes the form of an angled element;
• wherein the second region is at a spacing from the first region in a transverse direction and the transverse direction is oriented transversely to a longitudinal axis of the holding rod device;
• wherein the connection element is connected by way of the second region to a joint of the joint device with which a pivot axis is associated;
• wherein the joint is a first joint of the joint device with a first pivot axis and the second region is directly connected to a shaft of the first joint;
• wherein the connection element is connected by way of the first region to the holding rod device at an underside of the holding rod device;
• wherein there is arranged or formed in the cleaning head a recess in which the joint is positioned, with the second region penetrating into the recess, at least with a part of the second region, and the shaft being seated in the recess;
• wherein the first pivot axis lies within the cleaning head between an underside of the cleaning head and an upper side of the cleaning head and in or below the recess;
• wherein the holding rod device is pivotal about the first pivot axis between a first position and a second position and in relation to a longitudinal axis of the holding rod device, the first region of the connection element is oriented at least approximately parallel to an enveloping plane at the upper side of the cleaning head;
• wherein in the second position the cleaning machine has its minimal height H in a height direction between the underside of the cleaning head and the upper side of the cleaning head, further comprising a first roller unit, a second roller unit, and a drive device for driving the first roller unit and the second roller unit in rotation, wherein the drive device has the drive motor that, in relation to a longitudinal direction of the cleaning head, is positioned between the first roller unit and the second roller unit, wherein the drive device comprises a gear device through which torque of the drive motor is transmissible to the first roller unit and the second roller unit, and wherein the gear device comprises a step-down gear, wherein a speed of rotation of the first roller unit and a speed of rotation of the second roller unit are less than a motor speed of the drive motor;
• wherein the gear device has a pinion arrangement, which acts as a two-stage step-down gear, and a belt arrangement, which acts as a one-stage step-down gear, wherein the belt arrangement is coupled to the pinion arrangement in a manner applying torque;
• and
• wherein the pinion arrangement has a first gearwheel-and-pinion combined unit coupled to the drive motor, and a second gearwheel-and-pinion combined unit coupled to the first gearwheel-and-pinion combined unit and to the belt arrangement.