Nidec Copal Electronics Inactive USPTO patentsUtility application

This speed reducer with an electric motor has: a hollow shaft; a casing fixed to the hollow shaft; a fixed part that is relatively stationary with respect to the casing; an electric motor; a speed reduction mechanism; an output part; and a torque sensor that is connected to the casing and the fixed part.

In a force sensor according to one embodiment, a main body is cylindrical.

In a force sensor according to one embodiment, a main body is cylindrical.

In a force sensor according to one embodiment, a main body is cylindrical.

According to one embodiment, a housing includes a first accommodator and a second accommodator separated by a partition wall which has an opening in a portion thereof.

A strain body according to the embodiment includes a central portion, an outer peripheral portion surrounding the central portion, connecting portions connecting the central portion and the outer peripheral portion, first and second strain sensors provided on main surfaces of the connecting portions, reference resistors provided on a main surface of the central portion, and constructing a bridge circuit with the first strain sensors, and a full bridge circuit which is provided on the main surfaces of the connecting portions and in which a pair of the serially connected second strain sensors are connected in parallel.

A strain body according to the embodiments includes a central portion, an outer peripheral portion, connecting portions each includes a first connecting portion adjacent to the outer peripheral portion and a second connecting portion adjacent to the central portion, strain sensors provided on main surfaces of the connecting portions, reference resistors provided on a main surface of the central portion, and a strain increasing portion configured to increase strain occurring at the first connecting portion more than strain occurring at the second connecting portion, on a back surface side opposed to the main surface of the first connecting portion.

A strain body according to an embodiment includes a central portion, an outer peripheral portion, connecting portions, strain sensors provided on main surfaces of the connecting portions, reference resistors provided on a main surface of the central portion, and constructing a bridge circuit with the strain sensors, an electrode for taking a detection signal of the bridge circuit, a lead wire making electric connection between the electrode and the outside, and an anisotropic conductive film provided between the electrode and the lead wire to make electric connection between a terminal of the electrode and a terminal of the lead wire.

The torque sensor of the present embodiments comprises a first structure to be coupled to an object to be measured, a second structure, a first bridge circuit including a plurality of first strain sensors configured to detect force to be transmitted between the first structure and the second structure, a second bridge circuit including a plurality of second strain sensors configured to detect force to be transmitted between the first structure and the second structure, and a controller configured to output a signal indicating an abnormality when a difference between a first output voltage of the first bridge circuit and a second output voltage of the second bridge circuit is greater than a first threshold voltage.

A torque sensor includes a first region, a second region, a plurality of third regions connecting the first and second regions, a first strain generation part and a second strain generation part.