A steering device includes: a housing including a first planar surface, the housing being configured to accommodate a part of a rack shaft; an electric motor including a second planar surface facing the first planar surface, the electric motor including a bracket configured to support a rotary shaft; a tightening member configured to tighten the housing and the bracket in a state where the first planar surface and the second planar surface are mated; and a sealing member configured to provide sealing between the housing and the bracket at a position that is closer to the rotary shaft than the tightening member is. At least one of the first planar surface and the second planar surface is formed with a recess located between the tightening member and the sealing member and depressed from the at least one of the first planar surface and the second planar surface.

A method can be employed to produce a rack for a steering gear. The rack may include a toothed portion with a toothing, and a shaft portion with a functional portion. Separate segments comprising at least one in each case bar-shaped toothed segment and one shaft segment may be provided, which are aligned on a common longitudinal axis and are connected to one another at a joint. The method may involve providing a shaft raw material piece having a length that is a multiple of a shaft segment length, continuously grinding a part of a circumferential face of the shaft raw material piece across a multiple of the shaft segment length to produce a semi-finished shaft segment product, cutting to length a shaft segment from the semi-finished shaft segment product, providing a toothed segment, and joining the shaft segment to the toothed segment.

A rack for a steering gear includes a toothed portion with a toothing extending along a longitudinal axis, and a generally cylinder-segment-shaped back opposite the toothing and having a back radius. A method for producing such a rack includes forming a cylindrical blank with an unmachined radius between a toothed die part having a toothed mold clearance and a back die part having a back mold clearance in a die cavity. The die may have a generally cylinder-segment-shape. In an open position of the die, the blank may be inserted between the toothed mold clearance and the back mold clearance. The toothed die part and the back die part in a forging stroke for closing the cavity may then be moved in a closing direction to a closed position. The back radius of the back mold clearance may be larger than the unmachined radius of the blank.

There is provided an electric power steering apparatus in which a motor housing that contains motor constituent members and has a waterproofing function and a control unit case that contains control apparatus constituent members and has a waterproofing function are provided, in which an output axle of a motor extends to the outside of the motor housing while maintaining the waterproofing function, and in which a respiratory apparatus that performs a respiratory action, based on an inner pressure change, is provided in the motor housing.

A steering device includes a rack housing portion housing a rack shaft, a pinion gear provided on one end side of the rack housing portion, a first supporting portion provided on the rack housing portion to support the one end side of the rack housing portion, and a second supporting portion provided on the rack housing portion to support the other end side of the rack housing portion. The second supporting portion includes a first vehicle body mounting portion and a second vehicle body mounting portion provided to project outwardly of the rack housing portion, the first and second vehicle body mounting portions being mounted on a vehicle body. The first and second vehicle body mounting portions are arranged to be shifted in an axial direction of the rack housing portion so as not to overlap in the axial direction.

A multi-layer sliding member (1) includes a backing plate (2) formed from a steel plate, a copper-plated or nickel-plated layer (4) formed on one surface (3) of the backing plate (2), a porous sintered metal layer (5) integrally bonded to the surface (3) of the backing plate (2) through the layer (4), and a coating layer (8) filling pores (6) and coating on the surface (7) of the porous sintered metal layer (5) and formed from a synthetic resin composition. The synthetic resin composition contains a PTFE as a main component and further contains, as additives, 5 to 30% by mass of a thermotropic liquid crystal polymer, 5 to 12% by mass of a polyarylketone resin, 5 to 12% by mass of a melt moldable fluororesin, and 1 to 5% by mass of a polyimide resin.

An electric power steering system. The system includes a steering rack having a first end and a second end and at least one damper coupled to one of the first end and the second end. The system also includes an electronic controller configured to determine if the damper has been destroyed based upon a sensed steering angle being above a maximum steering angle threshold or based upon a received signal from an electrical circuit enclosed within the at least one damper.

A rack electric power steering system includes a rack having a single set of teeth with a constant tooth pitch. The system also includes a first pinion operatively coupled to a steering shaft and in meshed engagement with the single set of teeth of the rack. The system further includes a second pinion operatively coupled to an electric motor and in meshed engagement with the single set of teeth of the rack.

Disclosed herein is an assembly structure of a dust cap being coupled to an assembly part of a rack housing which is open such that a steering shaft is inserted therethrough, wherein the dust cap includes a body provided in a hollow tube shape through which the steering shaft passes, a first coupling portion bent to extend outward from the body and press-fitted onto an outer circumferential surface of the assembly part, and a second coupling portion provided to be spaced a certain interval from the first coupling portion and inserted into the assembly part, and the second coupling portion is provided such that, when assembled to the assembly part, a gap is formed between the second coupling portion and an inner surface of the assembly part.

A steering device includes: a rack shaft; a rack housing; a pinion shaft that meshes with the rack shaft; a speed reducer having a worm wheel that is coupled to the pinion shaft and a worm shaft that meshes with the worm wheel; a speed reducer housing; a motor that drives the worm shaft; a plate-shaped cover that seals an opening of the speed reducer housing; and a breather valve that is mounted on the cover in a state of penetrating through the cover. An inner surface of the cover that faces the worm wheel has an entry restricting part that restricts entry of a lubricant into the breather valve.