Abstract: A steering device includes a cylindrical support tube, a speed reducer, and a housing. The support tube includes a flange, and supports a steering shaft such that the steering shaft is rotatable. The speed reducer applies torque to the steering shaft. The housing includes a cylindrical portion that houses the speed reducer. The flange and the cylindrical portion are disposed coaxially, and coupled to each other by a bolt. The flange and the cylindrical portion include an engagement portion, at which the flange and the cylindrical portion are engaged with each other in a radial direction of the flange, at a different location from a location at which the bolt is provided.

Abstract: A steering device includes a cylindrical support tube that rotatably supports a steering shaft, a speed reducer configured to apply a torque to the steering shaft, and a housing that includes a cylindrical portion housing the speed reducer. A flange of the support tube and the cylindrical portion are disposed coaxially and coupled to each other with a bolt. A bearing support member is fitted to an inner peripheral surface of the cylindrical portion. The steering shaft extends through the bearing support member. A bearing is disposed between an outer peripheral surface of the steering shaft and an inner peripheral surface of the bearing support member. The bearing support member includes a deformation allowing portion configured to allow elastic deformation of the bearing support member in a radial direction.

Abstract: A steering column device includes a lower tube that is attached to a vehicle body so as to be pivotable in an up-down direction, a column shaft to which a steering wheel is attached, an upper tube that rotatably supports the column shaft and that also is attached to the lower tube so as to be movable in a front-rear direction, a motor for generating motor torque, a link mechanism that couples the lower tube and the upper tube so as to be capable of moving in conjunction, and a power transmission mechanism that acts to transmit the motor torque to the link mechanism. The link mechanism causes the pivoting of the lower tube in the up-down direction and the movement of the upper tube in the front-rear direction to be performed in conjunction, when the motor torque is transmitted to the link mechanism by the power transmission mechanism.

Abstract: A steering system includes a support tube including a flange and a housing including a cylindrical portion housing a speed reducer. The support tube includes a column bracket attached to a vehicle body. The housing is supported by a support shaft in such a manner that the housing can rotate with respect to the vehicle body. The flange and the cylindrical portion are connected to each other by bolts. The flange has insertion holes into which the bolts are inserted. Clearance that allows relative rotation between the flange and the cylindrical portion is present between the outer peripheral surface of the bolt and the inner peripheral surface of the insertion hole of the flange. An elastic body that reduces the relative rotation between the flange and the cylindrical portion is interposed in a compressed state between the bolt and the flange.

Abstract: A gear includes an annular sleeve and a tooth portion provided by injection molding to cover a part of the sleeve. The sleeve is a stacked body including a plurality of annular steel plates stacked in an axial direction of the sleeve.