A balanced speed reducer of a dual-sun gear variable-line-speed planetary row includes a dual-sun gear variable-line-speed planetary row, an input end an output end, a locking end, and auxiliary devices such as bearings. The dual-sun gear planetary row includes a left sun gear:, a right sun gear, and a planet carrier. A left planetary gear and a right planetary gear that are connected on each planetary gear shaft have the same rotation speed. The left planetary gear meshes with the left sun gear, and the right planetary gear meshes with the right sun gear. The number of gear sets is not less than two. A teeth number combination and a number of gear sets are set according to a range specifying parameter and following a principle of matching the teeth number combination with the number of gear sets.

A worm gear for a worm gear system of a motor vehicle steering device may include a hub, a support element, and a gear rim. The gear rim may have a multiplicity of teeth that extend radially outward from a central encircling annular web. The support element may be a support ring that by means of an injection-molding method is injected between the gear rim and the hub. The support element may connect in a form-fitting manner the hub and the gear rim. The gear rim may include reinforcement ribs that, on both end sides, from the teeth extend radially in a direction of a worm gear longitudinal axis.

A vehicle power steering assembly includes a housing, a ball nut configured to be operatively disposed in the housing and including an extension portion provided with a convex bearing surface, an insert supported on the housing and provided with a concave bearing surface. The concave bearing surface is complementary to the convex bearing surface. The convex and concave bearing surfaces are a plain bearing configured to provide sliding movement relative to each other. The sliding movement provides relative rotation between the convex and concave bearing surfaces in a first direction on the ball nut axis and a second direction on a rotation axis that is transverse to the ball nut axis.

The present invention relates to a gear ring carrier part (10) for a two- or multi-component gear (11), the gear ring carrier part (10) having a circular ring section (12) rotating in the circumferential direction about an axis of rotation (A), a gear ring (14) arranged radially on the outside of the circular ring section (12), and an extension (16) extending radially inward from the circular ring section (12), the extension (16) having a first extension face (30) and a second extension face (32), a number of first ribs (34) and an equal number of first pockets (36) being arranged on the first extension face (30), and/or a number of second ribs (38) and an equal number of second pockets (40) being arranged on the second extension face (30), the first ribs (34) and the first pockets (36) and/or the second ribs (38) and the second pockets (40) each extending radially and being arranged adjacent to one another in the circumferential direction. The invention also relates to a two-component or multi-component gear (11) with such a gear ring carrier part (10).

A multiband antenna transmission, including: a driving gear, a shifter, and a plurality of screw assemblies. The position and the driving gear are coaxially and rotatably arranged, and the shifter comprises a plate and a boss protruding from a side of the plate. The plurality of screw assemblies are arranged in a circumferential direction of the driving gear. Each of the plurality of screw assemblies includes: a lead screw, a driven gear selectively connected with or separated from the lead screw, and a first elastic member arranged between the lead screw and the driven gear. The boss is configured to sequentially push the driven gear of the respective screw assembly during rotation of the shifter, such that the driven gear is connected with the corresponding lead screw and whereby the driven gear is in mesh with the driving gear for transmission.

A screw thread bidirectionally driven disc brake piston resetting tool has a main body, a first clamping plate and a second clamping plate, wherein both sides of the main body are adjacent to the first clamping plate and the second clamping plate respectively. A driving piece and a tubular revolving part are pivoted in the main body. The driving piece drives the revolving part to revolve. The revolving part is screwed on a first connecting piece and a second connecting piece respectively. The first connecting piece and the second connecting piece are linked with the first clamping plate and the second clamping plate respectively, shifting oppositely. The distance between the first clamping plate and the second clamping plate can be increased without increasing the thickness of the main body, and it is applicable to piston resetting push-back operation for disc brakes of different sizes.

A screw thread bidirectionally driven disc brake piston resetting tool has a main body, a first clamping plate and a second clamping plate, wherein both sides of the main body are adjacent to the first clamping plate and the second clamping plate respectively. A driving piece and a tubular revolving part are pivoted in the main body. The driving piece drives the revolving part to revolve. The revolving part is screwed on a first connecting piece and a second connecting piece respectively. The first connecting piece and the second connecting piece are linked with the first clamping plate and the second clamping plate respectively, shifting oppositely. The distance between the first clamping plate and the second clamping plate can be increased without increasing the thickness of the main body, and it is applicable to piston resetting push-back operation for disc brakes of different sizes.

An inner roller feeding device for a baseplate of a counter-roller driving power spinning equipment includes an inner roller column, an inner roller top plate, an inner roller upper plate, an inner roller lower plate, a cam, a cam mounting cylinder, inner rollers, inner roller shafts, a feed screw, a servo motor and a baseplate. According to the inner roller feeding device, a brake motor serves as a power source, the inner roller is driven by the cam through a worm gear drive to feed along a radial direction of a workpiece, such that an inner roller mechanism is small in size, large in adjustment range and high in positioning precision.

An inner roller feeding device for a baseplate of a counter-roller driving power spinning equipment includes an inner roller column, an inner roller top plate, an inner roller upper plate, an inner roller lower plate, a cam, a cam mounting cylinder, inner rollers, inner roller shafts, a feed screw, a servo motor and a baseplate. According to the inner roller feeding device, a brake motor serves as a power source, the inner roller is driven by the cam through a worm gear drive to feed along a radial direction of a workpiece, such that an inner roller mechanism is small in size, large in adjustment range and high in positioning precision.

A torque transmitting gear includes a steel toothed annular flange having gear teeth defined on a periphery of the steel toothed annular flange. A steel hub is coaxially aligned with the steel toothed annular flange. A web is formed from a web material having a density less than or equal to 3.0 grams per cubic centimeter. The web is fixedly attached to the toothed annular flange and to the hub for rotation together with the toothed annular flange and the hub. The gear is to operatively transmit a torque of at least 500 Newton Meters for at least 6 million revolutions of the gear. An overall mass of the gear is less than two-thirds of an overall mass of a same-sized all steel gear having a solid steel web with a solid steel web thickness at least one-third of a face width of the toothed annular flange.