Abstract: A worm backlash adjustment device includes a drive unit, a backlash adjustment unit, and a control device. The drive unit includes a first motor device, a first drive member, a linking member, a passive member, and a second drive member. The first drive member and the linking member are coaxially driven by the first motor device. The passive member is coaxially connected with the second drive member and linked by the linking member to turn reversely. The two drive members are disposed at two sides of a driven member to drive the driven member, respectively. The backlash adjustment unit includes a second motor device, a screw member, and a backlash adjustment member. Through the screw member, the backlash adjustment member is driven by the second motor device to move linearly. The second drive member has a drive function and a backlash adjustment function.

Abstract: A worm backlash adjustment device includes a drive unit, a backlash adjustment unit, and a control device. The drive unit includes a first motor device, a first drive member, a linking member, a passive member, and a second drive member. The first drive member and the linking member are coaxially driven by the first motor device. The passive member is coaxially connected with the second drive member and linked by the linking member to turn reversely. The two drive members are disposed at two sides of a driven member to drive the driven member, respectively. The backlash adjustment unit includes a second motor device, a screw member, and a backlash adjustment member. Through the screw member, the backlash adjustment member is driven by the second motor device to move linearly. The second drive member has a drive function and a backlash adjustment function.

Abstract: A method for controlling back clearance of a motion transmission apparatus, is capable of controlling the generation, reduction and even elimination of a back clearance of a motion transmission apparatus to meet different needs. The motion transmission apparatus comprises: a first electric motor, a second electric motor, and a toothed member engaged with the first and second toothed drive members, when the toothed member needs to be precisely positioned, the back clearance between the second electric motor and the toothed member at different positions of the toothed member will be controlled according to the torque change, so as to consequently change a position offset of the second electric motor with respect to the first electric motor, when the toothed member doesn't need to be precisely positioned, the second electric motor shouldn't be controlled.

Abstract: A method for controlling back clearance of a motion transmission apparatus, is capable of controlling the generation, reduction and even elimination of a back clearance of a motion transmission apparatus to meet different needs. The motion transmission apparatus comprises: a first electric motor, a second electric motor, and a toothed member engaged with the first and second toothed drive members, when the toothed member needs to be precisely positioned, the back clearance between the second electric motor and the toothed member at different positions of the toothed member will be controlled according to the torque change, so as to consequently change a position offset of the second electric motor with respect to the first electric motor, when the toothed member doesn't need to be precisely positioned, the second electric motor shouldn't be controlled.