Abstract: The invention relates to a planar spiral gearbox, in particular for use in a door system, comprising: a gear, in particular a scroll plate, having a planar side on which a spiral toothed arrangement is arranged having at least one tooth that has a spiral tooth progression; and a cylindrical gear, in particular a torus gear, that has an external toothed arrangement at its jacket surface, wherein the spiral toothed arrangement of the gear is in meshing engagement with the external toothed arrangement of the cylindrical gear, with the gear having at least one additional toothed arrangement section that is radially spaced apart from an axis of rotation of the gear and serves for engagement of a drive toothed arrangement.

Abstract: A clamp, comprising a guide rail, a fixed jaw, which is arranged on the guide rail, a sliding jaw, which is displaceable on the guide rail, and at least one spindle, which is arranged displaceably on the sliding jaw and on which there is arranged or formed a pressure piece, with an actuation device, which is spaced from the at least one spindle and which actuable by an operator in order to control a displacement movement of the at least one spindle, with a force application device, which acts on the at least one spindle and by means of which a displacement movement of the at least one spindle is achievable, and with a transmission device, which connects the actuation device and the force application device.

Abstract: A gear reduction mechanism (1) includes a drive gear (10) having a rotation axis (L1), and a driven gear (20) driven in mesh with the drive gear (10) and having a rotation axis (L2) that is noncoplanar with the rotation axis (L1). The drive gear (10) is provided with spiral teeth, each having a tooth trace of a spiral curve having a spiral center on the rotation axis (L1) and a constant radial pitch, when viewed in the direction of the rotation axis (L1). Furthermore, the tooth profile of the driven gear (20) is set, considering a tangent angle that changes momentarily as the drive gear (10) rotates.

Abstract: A high transmission ratio gearbox of ring shape for easy integration inside mechanisms with limited space and robotic rotating joints for moving robotic arms. The toroidal gearbox includes at least one dual function gear, a toroidal spiral face drive to mesh with the at least one dual function gear and a cylindrical gear to mesh with the at least one dual function gear.

Abstract: A worm wheel includes: a sleeve; and a toothed portion provided by injection molding so as to cover a part of the sleeve, the toothed portion including a first thick portion provided on a first side face, which is a surface of the sleeve on a side closer to an injection-mold gate in an axial direction, and a second thick portion provided on a second side face, which is a surface on an opposite side to the first side face. A central part, in the axial direction, of the outer peripheral surface of the sleeve projects in the radial direction relative to both ends in the axial direction. The first thick portion of the toothed portion has a smaller thickness in the axial direction than the second thick portion.

Abstract: A deceleration device for a vehicle seat comprises an external gear comprising teeth with tops projecting radially outward. A tooth of the external gear comprises a straight portion and a critical cross-section located in a dedendum flank of the tooth of the external gear. The straight portion is provided in a vicinity of the critical cross-section and a thickness of the straight portion becomes linearly larger toward a root of the tooth.

Abstract: The present invention relates to a concave-convex arc line gear mechanism for parallel shaft transmission, which comprises a driving line gear and a driven line gear, axes of the driving line gear and the driven line gear being parallel to each other to form a transmission pair.

Abstract: A roller transmission and gearing mechanism with a driving body, one or more rollers, and a driven body coupled to the driven body via the rollers. The bodies define at least one pair of respective roller guide tracks thereon. The guide tracks start and terminate at respective pairs of limit surfaces. The rollers contact the guide tracks along rolling curves, and distances between points of the rolling curve on the driving body and the respective rolling curve on the driven body are different such that: for all contacting point-pairs on the rolling curves, the respective tangential planes are parallel to each other; the velocities of the contacting pairs of points are identical but have opposite signs; in the contacting points, the action lines of forces intersect the central axes of the rollers; and the lengths of the rolling curves of the driving and driven bodies are equal.

Abstract: A system to provide differential movement between a first surface, a second surface and a fixed surface includes a first surface movable between a first position and a second position; a second surface movable with the first surface and further movable beyond the first surface; a shaft connected to the second surface to move the second surface; and a drive unit connected to the fixed surface to drive the shaft to move the second surface relative to the first surface and to allow the shaft to move through the drive unit when the second surface is being moved by the first surface.

Abstract: A spiral-toothed gear wheel for a rack and pinion steering. The spiral-toothed gear wheel includes a pinion, which meshes on the power take-off side with a toothed rack, and a spiral-toothed gear, which is arranged on the pinion on the drive side in such a way that they rotate in unison, and on which a torque caused by a steering power or/and steering assist power acts. The spiral-toothed gear is designed as a built-up gear and includes a gear rim, which is arranged, relative to the axial direction of the gear or of the pinion thereof, between two flanges. The gear rim is pushed over a hub formed at one of the flanges and is fitted together with the flanges in a positive-locking manner. One of the flanges, namely, the flange having the hub for the gear rim, is made in one piece with the pinion.

Abstract: A differential apparatus for a vehicle comprises a pair of output gears 3, 4, first and second pinion gear 5, 6 intermeshing with the output pinion gears, and a differential case 2 accommodating the output gears and pinion gears. The second pinion gear 6 has large and small gear portions 6A, 6B whose pitch diameters are different and whose which tooth numbers is same respectively, and a tooth crest 60 and a tooth recess 61 formed to be shared by the large and the small gear portions 6A, 6B continuously from the large gear portion 6B to the small gear portion 6A.

Abstract: An exemplary probe apparatus includes a fixture, a first probe assembly, a motor, a lead screw, two guide members, a second probe, and a reduction gear unit. The first probe assembly is fixedly attached to the fixture and includes a first probe. The motor has a drive shaft attached to the fixture. The lead screw is coupled to the fixture. The two guide members are attached to the fixture and parallel to the lead screw. The second probe assembly is moveably attached to the lead screw and the at least one guide member, and includes a second probe. The reduction gear unit is coupled to the drive shaft and the lead screw to transmit power from the motor to the second probe assembly through the lead screw. The second probe assembly is configured for moving the second probe towards or away from the first probe along the two guide members.

Abstract: A ring and pinion gear set comprises a ring gear and a pinion gear. The pinion gear has a plurality of rolling elements. The ring gear has a plurality of mating grooves. The plurality of rolling elements of the pinion gear is adapted to interact with the plurality of mating grooves of the ring gear.

Abstract: A webbed spiral bevel gear formed by cold forging includes: gear teeth formed at a peripheral surface of the gear basis to be integral therewith. Each gear tooth includes a tooth top land and a tooth bottom land both in a slanting and curved manner relative to a center axis of the gear basis. The webbed spiral bevel gear includes a web portion formed at radially outer end portions of the gear teeth to be integral therewith and closing the tooth bottom lands at the radially outer end portions of the gear teeth. The web portion is continuous with the radially outer end portions of the tooth top lands. A profile of the radially outer end portion of the tooth top land of each gear tooth has two edges extending at a slant from each other and expanding in a direction of the web portion.

Abstract: In a method of manufacturing multiple transmission units with individually selectable gear ratios that vary from unit to unit, a gear pair having a desired transmission ratio is selected from a multiplicity of interchangeable gear pairs that includes both spiroplan gears and conventional crown gear and pinion combinations. The selected gear pair is then installed into a housing having first and second bearing sections configured to support bearings in which the shafts of the selected gear pair are rotatably mounted. The bearing sections are configured such that, for every gear pair that may be selected from among the multiplicity of gear pairs, the bearing sections support the first and second shafts in such a position and orientation that teeth of the gears engage with each other and a longitudinal axis of one of the gears of the gear pair is offset by a fixed distance from a longitudinal axis of the other.

Abstract: The engagement of gearwheels with curvilinear teeth is intended to create small-sized mechanical gears of rotational motion with big gear ratio in one stage. The smaller gearwheel—pinion (16)—has one tooth, having in its face section the shape of circumference (3), eccentrically shifted with respect to the axis OO1 of the gearwheel (16). The curvilinear helical tooth of the gearwheel (16) (helical eccentric) is generated by sequential shifting of the circumference 3 along the axis OO1 and its continuous turning around the axis. The greater gearwheel (17) has helical teeth, generated by turning of the cycloidal curve (5), the teeth are conjugated with the helical surface of the pinion (16). The engagement has a continuous line of contact along the whole length of the tooth, where in each section a circular pin tooth and a cycloid are engaged, having minimum losses for friction. In order to eliminate axial loads, occurring in engagement of helical teeth, the gearwheels (16) and (17) are made herring-bone.

Abstract: A gear mechanism includes a rotating input element, a rotating output element, and at least one first force transmission device arranged along a spiral line on a face of the input element. A second force transmission device is arranged along an encircling line on a face of the output element. The interaction of these force transmission devices transmits a turning moment from the input element to the output element, whereby this turning moment effects a rotating motion in the output element so that the rotational speed is lower than the rotational speed of the input element. A rotary encoder may be equipped with a gear mechanism of the aforementioned type.

Abstract: A shaft coupling arrangement and a corresponding method for coupling shafts are disclosed herein. The shaft coupling arrangement includes an input shaft operable to rotate about a first axis. The shaft coupling arrangement also includes an output shaft operable to rotate about a second axis. The shaft coupling arrangement also includes a gearing arrangement operable to engage the input and output shafts together for rotation in the same angular direction at different angular speeds. In one embodiment of the invention, the gearing arrangement includes a plurality of nested bevel gears. In another embodiment of the invention, the gearing arrangement can include a single layshaft.

Abstract: The invention relates to a geared, irreversible motion transmitting device comprising a massive casing supporting an input means and an output means, one end of the input means being fitted with a pinion whereas one end of the output means is fitted with a gear wheel, said pinion and said gear wheel constituting a gear system. Said gearwheel and pinion are designed in a manner that, in operation, pinion rotation generates an effective force acting a distance off the center (C2) of the gear wheel, thereby implementing a corresponding gear wheel rotation, whereas gear wheel rotation generates an effective force (F?2) acting near the pinion center in a way to avert generating a corresponding pinion rotation.

Abstract: A servo drive system of a press machine includes a ram, an operation shaft which vertically moves the ram, and a servo motor which operates as a power source of the ram and which generates ram pressure using a torque based on at least one speed-torque characteristic of the servo motor. The operation shaft is directly driven using the servo motor. The at least one speed-torque characteristic of the servo motor is set in a manner such that a motor torque of the servo motor at which a capacity of electric energy supplied by a servo amplifier is determined becomes the motor torque at which an optimal punching pattern of the ram is generated from a light load to a heavy load according to a type of workpiece to be worked by the press machine.

Abstract: A CVVL system including a self-locking helical gear pair with, optionally, a transmission to increase output torque of the actuator. The self-locking helical gear pair provides high forward efficiency and a fully mechanically self-locking feature. The actuator therefore requires a smaller motor to perform the same actuation as a prior art worm-gear system. The CVVL system comprises two helical gears having a radial pressure angle {acute over (?)} between 45° and 75° and a helix angle ? between 60° and 80°. An asymmetric tooth profile is presently preferred, reducing contact stress and permitting higher torque density. Preferably, the helical gears are discontinuous and comprise laminated spur gear slices and hence are less costly to produce than continuous helical gears. Configurations are possible within the scope of the present invention include a single stage gear system; a multiple stage gear system; a planetary gear system; and an internal or external gear system.

Abstract: A spiral-toothed gear is provided with a toothed ring (2) formed by extrusion coating a basic body (1) with a plastic. The spiral-toothed gear provides a connection between the basic body (1) and the toothed ring (2), whose strength makes possible the transmission of high torques in a reliable manner. The basic body (1) of the spiral-toothed gear has a flange with a disk-shaped area (1?) that is extrusion coated with the plastic toothed ring (2). The area (1?) of reduced diameter adjoining area (1?) forms a hub for mounting the spiral-toothed gear on a shaft in such a way that it rotates in unison. The area (1?) of the flange has, axially on both sides, a plurality of recesses (3, 3?) each, which are arranged distributed on its circumference, extend primarily in the axial direction but do not pass through area (1?).

Abstract: A method of manufacturing a helical gear, includes a gear cutting process for forming a roughly-processed gear by applying a gear cutting to an outer circumferential surface of a blank, and a tooth surface forming process for forming a tooth surface by pressing a rolling die against a roughly-processed tooth surface of the roughly-processed gear, wherein a length of a portion of the roughly-processed tooth surface, to which a plastic deformation is applied by the rolling die, in a face width direction is formed to be shorter than a length of a face width of the roughly-processed tooth surface.

Abstract: Within the systems used to transmit power and or movement between two shafts, toothed wheels can be used. Also, pairs of screws with their complementary threads engaged can be used. A geometry is described for the thread profiles, for screws used in the transmission of power and or movement between two shafts. That geometry enables the threads to have the widest possible contact. The shafts can be in any relative position: parallel, perpendicular, neither coplanar nor perpendicular, coplanar or not.

Abstract: A servo drive system of a press machine has a pair of servo motors which can generate necessary ram pressure by compositing and using a torque based on the same speed-torque characteristics. The servo motors are symmetric with each other in a mirror image manner. The servo motors are opposed to each other at opposite ends of an operation shaft which vertically moves a ram. The servo motors are integrally operated, thereby directly driving the operation shaft.

Abstract: A gear unit includes a housing, two shafts arranged parallel with one another and each supporting a helically cut toothed gear, and two pairs of bearings supported by or relative to the housing in an arrangement in which each pair of bearings rotatably supports a shaft with the toothed gears of the two shafts being rotatable one relative to the other in mutual engagement. Two bearings of the two shafts lying to a common side of the inter-engaged helical gears are supported by a substantially common wall section of the gear unit housing, one of the two bearings being arranged to transmit to the housing wall section axial forces acting in a direction from the gears to the bearing and the other bearing being arranged to transmit to the wall section axial forces acting in a direction from the other bearing to the gears.

Abstract: An actuator for an automotive seat that includes two main assemblies: (1) a motor assembly; and (2) a gearbox assembly. The gearbox assembly includes multiple stages of gear reduction and a dividing plate. In some embodiments, the gearbox assembly has a single-lead worm, a worm gear with a right-hand helix tooth direction, and a worm gear with a left-hand helix tooth direction. The worm gears are driven by the single-lead worm. The single-lead worm has two ends, one end has a right-hand tooth helix direction, and the other end has a left hand helix direction.

Abstract: A device for linearly moving a useful mass is described. Typically, when a large useful mass is moved, relatively large forces are transferred by a spindle or a toothed rack to the corresponding machine or machine frame. These forces can be compensated by moving a compensating mass in the opposite direction of the useful mass.

Abstract: A helical gear having helical tooth portions of the helical gear being worked by a punch and a die having a land of a smaller distance between opposed working surfaces formed to be inclined than that of other portion, formed on predetermined portions in tooth directions of respective opposed working surfaces thereon, in which worked surfaces on both side of the helical tooth portions on the helical gear as a work are ironed by the land in response to the helical tooth portions passing through the land when the work is forged by the punch.

Abstract: In a method of manufacturing multiple transmission units with individually selectable gear ratios that vary from unit to unit, a gear pair having a desired transmission ratio is selected from a multiplicity of interchangeable gear pairs that includes both spiroplan gears and conventional crown gear and pinion combinations. The selected gear pair is then installed into a housing having first and second bearing sections configured to support bearings in which the shafts of the selected gear pair are rotatably mounted. The bearing sections are configured such that, for every gear pair that may be selected from among the multiplicity of gear pairs, the bearing sections support the first and second shafts in such a position and orientation that teeth of the gears engage with each other and a longitudinal axis of one of the gears of the gear pair is offset by a fixed distance from a longitudinal axis of the other.

Abstract: A hand-held power tool (2) includes an angle drive (20) for connecting the motor-driven driving shaft (6) and the driven shaft (10) connected with a tooth holder (24) for joint rotation therewith, and having drive toothing (14) provided on the drive shaft (6) and driven toothing (16) provided on the driven shaft and cooperating with the drive toothing (14) for driving the driven shaft (10) in the driven direction (DAb) in response to the drive shaft (6) being driven in the drive direction (DAn), with the driven toothing (16) being inclined over its circumference (36) in a direction opposite the driven direction (DAb), and with the driven shaft (10) having an axial stop (30) for limiting an axial displacement backlash of the drive shaft (6) relative to the driven shaft (10).

Abstract: A running gear toothing for gearwheels and a process for producing such running gear is provided. In order to be able to work complex shapes (e.g. reinforcing ribs) into running gear, a preforged or precast gearwheels are produced oversized, and are then finished using an electrochemical erosion process. The invention eliminates complex machining operations and permits gear teeth finishing in highly spaced-constrained applications, thereby eliminating the need for production and assembly complex multi-component gears.

Abstract: A steering actuator of an independent type steer-by-wire system comprises a housing fixed to a vehicle body and an ultrasonic motor. The ultrasonic motor has a stator internally fixed to the housing and a rotator rotating relative to the stator when an electric current is applied. A steering rod having a first end and a second end penetrates through a center portion of the ultrasonic motor. The first end of the steering rod extends out of the housing for connection to a tie rod. In one embodiment, a ring gear, planetary gears, sun gear and/or racks formed at the steering rod are operably associated with converting rotating movement of the ultrasonic motor into linear movement of the steering rod. In another embodiment, a rotator ring, a plurality of pinions, worm gears and a plurality of racks formed at the steering rod are operably associated with converting rotating movement of the ultrasonic motor into linear movement of the steering rod.

Abstract: Within the systems used to transmit power and or movement between two shafts, toothed wheels can be used. Also, pairs of screws with their complementary threads engaged can be used.

Abstract: A structure of a variable transmission device includes an input shaft driven by a motor to perform alternate rotation having a gear on a middle portion, an output shaft having a pair of gears secured to the upper and lower ends respectively and a speed changing shaft positioned between the input and output shaft having a pair of gears rotatably secured to two ends respectively meshed with the gears of the output shaft and a spiral outer periphery on a middle portion rotatably and slidably engaged with an inner threaded gear which meshes with the teeth of the gear of the input shaft. Thereby, the rotation of the input shaft drives the inner threaded gear to rotatably slide about the spiral outer periphery to force the gears of the speed changing shaft to rotate and in turn to drive the gears of the output shaft to rotate in concert with the input shaft.

Abstract: The invention relates to a modular transmission system, comprising in at least one transmission stage with a housing a plurality of transmissions with different multiplications, each having a first transmission step comprising an annular gear with a pinion offset, said pinion off-set being identical for all transmissions of one transmission stage. The modular transmission system is provided with at least one first pinion of the angular gear with a first serrated crown gear in a crown gear serration and a second pinion with a second crown gear in a spiroplan gearing.

Abstract: A displacement unit for at least one element to be displaced is provided comprising a drive unit, a transfer element that is caused to move by the drive unit and that comprises a thread or a tooth set, and an engagement element, which engages into the thread or tooth set of the transfer element and is thus driven by the motion of the transfer element, and by whose motion the displaced element is moved. The engagement element is configured elastically, in such a way that it deforms elastically upon contact by the displaced element against a stop or obstacle.

Abstract: A fail-safe ball screw assembly has a double-start screw and a corresponding nut. The screw has a first helix with a truncated, smaller diameter flat and an intertwined second helix with an extended, larger diameter flat. Similarly, the corresponding nut has a first helix with an extended, larger diameter flat and an intertwined second helix with a truncated, smaller diameter flat. When the screw is inserted with the nut, the screw's truncated first helix is paired with the nut's extended first helix, and the screw's extended second helix is paired with the nut's truncated second helix. The nut and screw helixes combine to form channels in which bearings balls travel. The bearings allow the fail-safe ball screw assembly to operate with high efficiency and precision, while the overlapping structure of the helixes prevents catastrophic failure caused by the removal or loss of the bearing balls.