A motor-driven power steering system includes a worm shaft unit having a worm gear, a worm wheel unit rotatably engaging with the worm gear, a housing unit having a worm receiving part formed therein to receive the worm shaft unit, and a shaft support unit having a support part located between the housing unit and the worm shaft unit to support the worm shaft unit, and a shaft pressing part located between the support part and the worm shaft unit to press the worm shaft unit towards the worm wheel unit.

A motor-driven power steering system includes a worm shaft unit having a worm gear, a worm wheel unit rotatably engaging with the worm gear, a housing unit having a worm receiving part formed therein to receive the worm shaft unit, and a shaft support unit having a support part located between the housing unit and the worm shaft unit to support the worm shaft unit, and a shaft pressing part located between the support part and the worm shaft unit to press the worm shaft unit towards the worm wheel unit.

A portable storage device to contain fuel. The device is designed to be relatively light-weight to allow for movement around a fueling facility, and to be delivered to the fueling facility through the air. The device includes a number of separate tanks each configured to contain fuel. A suspension protects the tanks by absorbing external forces that could occur in the event the device is dropped during air delivery.

A portable storage device to contain fuel. The device is designed to be relatively light-weight to allow for movement around a fueling facility, and to be delivered to the fueling facility through the air. The device includes a number of separate tanks each configured to contain fuel. A suspension protects the tanks by absorbing external forces that could occur in the event the device is dropped during air delivery.

A first end portion of a worm shaft and a first bearing that supports the first end portion are housed in a first end housing portion in a housing. The first end portion is urged toward a worm wheel by an urging member. A rotation regulation portion housing recess is formed in a portion that defines the first end housing portion on an inner surface of the housing. An elastic member includes an arc-shaped buffer portion that is interposed between the portion that defines the inner surface and an outer peripheral surface of the first bearing, and a rotation regulation portion that extends from the buffer portion and is housed in the rotation regulation portion housing recess. The rotation regulation portion includes a hollow portion which suppresses load transmission from the rotation regulation portion to the buffer portion during rotation regulation.

A first end portion of a worm shaft and a first bearing that supports the first end portion are housed in a first end housing portion in a housing. The first end portion is urged toward a worm wheel by an urging member. A rotation regulation portion housing recess is formed in a portion that defines the first end housing portion on an inner surface of the housing. An elastic member includes an arc-shaped buffer portion that is interposed between the portion that defines the inner surface and an outer peripheral surface of the first bearing, and a rotation regulation portion that extends from the buffer portion and is housed in the rotation regulation portion housing recess. The rotation regulation portion includes a hollow portion which suppresses load transmission from the rotation regulation portion to the buffer portion during rotation regulation.

A steering mechanism having a piezoelectric element to adjust component clearance and preload based on steering inputs, road inputs, and time in service. The piezoelectric element positioned in the steering mechanism for electric adjustment so that the clearance and preload can be adjusted electrically in response to steering inputs, road inputs, and time in service. This arrangement allows for low preload and low friction when the vehicle is being driven over smooth road conditions. When a rough road condition is detected both clearance and preload can be electrically increased to minimize noise. The disclosed inventive concept may find application in a variety of steering mechanisms to minimize or eliminate NVH when the vehicle is driven over rough surfaces. Without limitation, the piezoelectric element may be provided in rack and pinion electric power assisted steering systems or in worm and wheel (steering column) electric power assisted steering systems.

A steering mechanism having a piezoelectric element to adjust component clearance and preload based on steering inputs, road inputs, and time in service. The piezoelectric element positioned in the steering mechanism for electric adjustment so that the clearance and preload can be adjusted electrically in response to steering inputs, road inputs, and time in service. This arrangement allows for low preload and low friction when the vehicle is being driven over smooth road conditions. When a rough road condition is detected both clearance and preload can be electrically increased to minimize noise. The disclosed inventive concept may find application in a variety of steering mechanisms to minimize or eliminate NVH when the vehicle is driven over rough surfaces. Without limitation, the piezoelectric element may be provided in rack and pinion electric power assisted steering systems or in worm and wheel (steering column) electric power assisted steering systems.

The present disclosure relates to a vehicle steering apparatus, the vehicle steering apparatus includes a main housing; a worm shaft rotatably disposed on the main housing; a worm wheel meshed with the worm shaft; a bearing disposed on the worm shaft; an elastically deformable guide surrounding an outer surface of the bearing and disposed within the main housing; and a pressing part extending through the elastically deformable guide to be in contact with the bearing and configured to press the worm shaft toward the worm wheel.

The present disclosure relates to a vehicle steering apparatus, the vehicle steering apparatus includes a main housing; a worm shaft rotatably disposed on the main housing; a worm wheel meshed with the worm shaft; a bearing disposed on the worm shaft; an elastically deformable guide surrounding an outer surface of the bearing and disposed within the main housing; and a pressing part extending through the elastically deformable guide to be in contact with the bearing and configured to press the worm shaft toward the worm wheel.