An electromechanical power steering system may include an electric servomotor that has a motor shaft and drives a shaft that meshes with a helical gear. The shaft is disposed in a gearbox housing and rotatably mounted in a bearing assembly. A pretensioning installation, for adjusting engagement between the helical gear and the shaft, resiliently pretensions a movable bearing element of the bearing assembly relative to the gearbox housing. The gearbox housing has a housing portion having first and second contact faces, the normals of which do not intersect. The bearing assembly has a bearing support that forms the movable bearing element and has a lever arm having a free end that extends from a main body of the bearing support and on the gearbox housing lies against the second contact face. The main body has an eccentric cam that on the housing lies against the first contact face.

The disclosure relates to a transmission housing unit and to a transmission unit which has said transmission housing unit. The transmission housing unit has a housing main body which has a through hole, through which a shaft which penetrates the housing main body in the axial shaft direction can be pushed into the housing main body, a wedge-shaped compensation element for axial play compensation between the shaft and the housing main body which engages around the shaft at least in a U-shaped or arcuate manner, and a pre-stressed spring element which is arranged between the obtuse end of the compensation element and the housing main body. The compensation element can be displaced radially in the direction of the shaft axis along a guide surface of the housing main body between an assembly position and an active position.

A motor includes a motor unit, a speed reduction mechanism, a motion conversion mechanism, and a housing. The motion conversion mechanism converts rotary motion of the speed reduction. mechanism into reciprocating rotary motion and transmits the motion to an output shaft. The speed reduction mechanism includes a worm, a first gear, and a second gear. The worm is disposed on a rotation shaft of the motor unit. The first gear transmits rotation of the worm and rotates about a first shaft. The second gear receives rotation of the first gear and rotates about a second shaft. The motion conversion mechanism includes a rotary member and a rod. The rotary member includes a sector gear and rotates about an axis of the first shaft. The rod couples the second gear and the rotary member. The output shaft includes an output gear that engages the sector gear.

A worm shaft includes: an insertion portion; a wall surface; a tapered portion; and a main body portion, the gear portion is formed on the main body portion and the tapered portion such that a bottom land of the gear portion is positioned at radially outer side of a line extending in parallel with a rotation center axis of the worm shaft and passing through a boundary between the wall surface and the tapered portion.

A power operated scribe saw including a head assembly affixed to a handle assembly. The head assembly includes a frame body, a drive train and a cutting blade. The drive train includes a worm driveshaft and worm rotating about a longitudinal axis of rotation and a blade driveshaft and worm gear rotating about a transverse axis of rotation, the cutting blade rotating with the blade driveshaft. The frame body includes a longitudinal throughbore and a transversely extending recess extending into a first side wall, the throughbore including a seating surface. A worm driveshaft support assembly supports the worm driveshaft for rotation and includes a first bearing engaging the worm drive shaft between the distal end of the worm driveshaft and the worm and a second bearing on the seating surface of the throughbore and engaging the worm drive shaft between the proximal end of the driveshaft and the worm.

A bearing adjustment assembly is provided. The assembly includes a worm engaged with a worm gear. The assembly also includes a worm bearing located proximate an end of the worm. The assembly further includes a spring disposed in a spring bore defined by the housing. The assembly yet further includes a compensation mechanism engaging the worm bearing and the spring, the compensation mechanism being adjustable to bias the worm bearing to maintain or adjust a gear mesh load between the worm gear and the worm, wherein compression of the spring adjusts the compensation mechanism biasing of the worm bearing. The assembly also includes a spring retainer comprising a pin retainer portion disposed within an interior of the spring, the pin retainer portion extending from a main body portion of the spring retainer.

A worm (40) according to an embodiment is a worm made of resin and formed by injection molding. The worm includes a gear portion (40a), a cavity (40c) having an axis being a longitudinal axis (40d) of the worm being formed at the gear portion, and a top portion (40b) formed at a first end portion of the gear portion in a direction of the longitudinal axis. A plurality of recesses (40e) including a hole portion communicating with the cavity are formed at the top portion in a radial direction, and are located on an outer peripheral portion side of the gear portion with respect to the cavity.

Provided are a motor device and a method for manufacturing the same that can accurately and consistently provide a support shaft to a case and enhance the strength for fixing the support shaft to the case. A small-diameter part having a smaller diameter than a large-diameter part is formed through drawing. The large-diameter part and a step part are embedded in a gear case. The small-diameter part is exposed outside the gear case. The dimensional accuracy (dimensional tolerance ±α) of the external diameter of the small-diameter part is enhanced. The small-diameter part can be set, without rattling, in a lower mold for molding the gear case. Consequently, the support shaft can be accurately and consistently provided to the gear case. Because the large-diameter part and the step part are embedded in the gear case, the resistance of the support shaft against pulling from the gear case can be enhanced.

The invention relates to an adjustment drive (5, 6) for a motor-adjustable steering column (1) for a motor vehicle, comprising a gearbox (8, 9) having a drive module (82, 92) in which a drive wheel (922) which is able to be driven in a rotating manner about a drive axis (A) and which operatively engages with a gearbox wheel (912) that is mounted in a gearbox module (81, 91) so as to be rotatable about a gearbox axis (G) and is connected to a threaded spindle (52) or a spindle nut (61) of a spindle drive is mounted, wherein the drive module (82, 92) and the gearbox module (81, 91) are connected to one another by way of at least one joining connection (93). In order for the joining connection (93) to be able to be generated with less complexity in terms of machining and assembling in a reproducible manner, it is proposed according to the invention that the drive module (82, 92) and/or the gearbox module (81, 91) for bracing the drive module (82, 92) and the gearbox module (81, 91) in the region of the joining connection (93) have/has at least one elastic tensioning element (94).

A gas turbine engine for an aircraft, including the following: a core engine including a turbine, a compressor, and a core shaft connecting the turbine to the compressor; a fan, which is positioned upstream of the core engine, wherein the fan includes a plurality of fan blades; and a gear box which can be driven by the core shaft, wherein the fan can be driven at a lower rotational speed than the core shaft by means of the gear box, wherein the core shaft is designed as a drive shaft for the gear box and has at least one axial first region which has a diameter greater than the diameter of at least one axial second region, wherein the at least one first region is arranged axially between the drive side of the gear box and a mounting and/or attachment on a static part of the gas turbine engine.