Patent ID: 7028540
Filing Date: 2006-04-18
Classification: G01L

Abstract:
1. A device for detecting force acting on a tire that is attached to a disk wheel that rotates around an axle, the device comprising: a rotation body that is provided between the axle and the disk wheel and is integrally rotatable with the disk wheel around the axle, axle-side linking portions that are included in the rotation body and linked with the axle; wheel-side linking portions that are included in the rotation body and linked with the disk wheel; at least one pair of a first load sensor and a second load sensor, wherein the first load sensor is arranged, in a rotational direction around the axle, in an order of a first axle-side linking portion, the first load sensor, and a first wheel-side linking portion, wherein the second load sensor is arranged, in the rotational direction around the axle, in an order of the first wheel-side linking portion, the second load sensor, and a second axle-side linking portion; and sandwiched portions, each of the sandwiched portions being provided between a respective axle-side linking portion and a respective wheel-side linking portion, wherein each of the sandwiched portions includes one of the first load sensor and the second load sensor and is formed of a member that is elastically deformable in the rotational direction, wherein, when a torque around the axle is transmitted to the rotation body from one of the axle-side linking portion and the wheel-side linking portion, the axle-side linking portion and the wheel-side linking portion cause the sandwiched portions to be elastically deformed, wherein, when the sandwiched portions are deformed, one of the first load sensor and the second load sensor receives compression force while the other receives extension force, and wherein the force acting on the tire is detected based on the received compression force and the received extension force.