Abstract: A speed change device, preferably for a power tool, may include a first drive gear and a second drive gear mounted on a drive shaft, and may include a first driven gear and a second driven gear mounted on a driven shaft. When the second drive gear is in a first position, a first gear portion of the second drive gear engages the second driven gear, so that the rotational energy of the drive shaft is transmitted to the driven shaft via a first transmission path through the second drive gear and the second driven gear. When the second drive gear is in a second position, a second gear portion of the second drive gear engages the first drive gear, so that the rotational energy of the drive shaft is transmitted to the driven shaft via a second transmission path through the second drive gear, the first drive gear and the first driven gear.

Abstract: There is disclosed an actuator for a rotary valve, such as a butterfly valve which rotates a quarter of a turn between open and closed positions. The actuator includes a drive mechanism releasably attachable to the stem of the valve for rotating it in response to operation of a reversible electric motor.

Abstract: There is disclosed a gear module comprising an output gear pivotally fitted to a base, a transmission gear rotated by a driving force from a driving motor to transmit the driving force to the output gear, a power actuating lever having a base end pivotally fitted to the base to be rotated around the base end; an actuated lever having a top end pivotally fitted to the transmission lever and a base end pivotally fitted to the base; and a connection bar connecting the top end of the power actuating lever and the top end of the actuated lever, the connection bar allowing the actuated lever to rotate in accordance with a rotation of the power actuating lever and allowing the transmission gear and the output gear to be engaged with each other, wherein the link axises of the power actuating lever and the connection bar form approximately a straight line when the transmission lever is engaged with the output gear.

Abstract: A speed reducer for a mixing apparatus having a gear train mounted within a housing such that the output shaft is supported by upper and lower bearings mounted within the upper portion and base of the housing, respectively. The lower output shaft bearing preferably is mounted within a recess in the underside of the housing base below a dry well containing the output shaft. The dry well forms a lubricant sump within the housing and preferably is unitary with the housing base. By placing the output shaft bearing below the dry well in the base of the housing, the diameter of the bearing can be increased to bear larger loads without being restricted by the dry well and is better able to transmit bending and radial loads to a relatively massive portion of the housing, and is placed closer to the load, thereby minimizing the amount of unsupported output shaft projecting from the reducer.

Abstract: A geared motor is provided. A through hole formed in a base passes a rotor shaft. An annular guide rim to guide a carrier and a cylindrical stationary gear are integrally and concentrically formed on the base which seals an open end of a small motor. A guide to guide the rotation of a movable gear is provided at the top end of the stationary gear. The gears making up the geared motor are disposed in a compact arrangement with high accuracy.

Abstract: A gear reduction system is provided including two-stage gear reducers that may be converted to three-stage gear reducers by addition of a modular input stage. The modular input stage converts the input stage of the two-stage reducers to an intermediate stage of the three-stage reducers. Gearing, preferably including both drive pinions and driven gears, of the input stages of the two-stage reducers are used in the intermediate stages of the three-stage reducers, thereby reducing the overall number of parts needed for a family or series of reducers. Gearing is also common between input (and intermediate) stages of smaller gear reducers and modular input stages used with larger gear reducers, further reducing the number of different parts. The two-stage reducers and modular input stages of the three-stage reducers are preferably driven by modular transmission adapters that support the drive pinions of the input stages.

Abstract: There is disclosed an actuator for a rotary valve, such as a butterfly valve which rotates a quarter of a turn between open and closed positions. The actuator includes a drive mechanism releasably attachable to the stem of the valve for rotating it in response to operation of a reversible electric motor.

Abstract: A gear reducer, especially for a mixer, has a housing supporting a pinion shaft with a pinion gear rotatably driven by a motor, mechanically coupled with a rotatable driven shaft having a driven gear meshing with the pinion gear. The driven gear can be coupled, for example, to the impeller of a mixer via a vertical impeller shaft. The pinion shaft is carried in a cartridge that is adjustably mounted to the housing for moving the pinion shaft toward and away from the driven gear and for accommodating pinion gears of different diameters to change the gear reduction ratio without the need to change the driven gear on the impeller shaft. The cartridge is pivotally mounted to the housing at a point spaced from the axis of the driven shaft such that the cartridge and the pinion gear can be rotated toward and away from the driven gear. This also permits intermediate reduction gears that may extend below the driven gear to be moved clear of the driven gear such that the cartridge can be lifted free.

Abstract: An integral outboard bearing support for a gear reducer on a papermaking machine oscillating doctor. The bearing support rotatably supports a distal end of the gear reducer's drive shaft to reduce deflection and fatigue. The outboard support also aligns internal bearing supports with the outboard support to optimize performance by preventing current reducer shaft and support bearing failures.

Abstract: An apparatus for limiting deflection of the armature shaft 38, 38', 103 of an electrically powered tool, such as a hand held saw 10 or drill 91. In saw 10, the armature shaft 38, 38'extends as a cantilever from the motor 14 and has a geared connection 58, 60 to an arbor 44 for driving the saw blade 18. An arrangement for limiting the deflection of the armature shaft 38, 38' comprises a pilot member 72, 84 and a socket 68, 82 associated, respectively, with one and the other of the armature shaft and a motor housing supported wall. The socket 68, 82 is larger in cross-section than that of the pilot member 72, 84 and limits transverse deflection of the armature shaft 38, 38' away from its axis of rotation A. If the saw 10 stalls in the material being cut, force is transmitted from the geared connection 58, 60 to the armature shaft 38, 38'.

Abstract: An automotive vehicle suspension unit assembly located near the sides of a vehicle includes a driving axle shaft, a gear box, an electric motor, and a suspension beam. The driving axle shaft, which drives a wheel hub of the vehicle, defines an axis of rotation about which the wheel hub rotates. The gear box includes a pinion shaft connected to a pinion gear which meshes with a ring gear. The pinion shaft is driven by a motor drive shaft which extends outwardly from the electric motor. The motor generates the torque necessary to drive the driving axle shaft. As known, suspension beams extend transversely to the axis of rotation of the driving axle shaft. The electric motor is pivotally attached to the gear box by means of a flexible coupling and is pivotally attached to the suspension beam by means of a movable connection.

Abstract: An electromotive drive mechanism for a piece of furniture, includes a gearmotor having a rotor rotating about a rotational axis, an adjusting spindle for operation of a piece of furniture, and a gear unit connecting the spindle to the rotor of the gearmotor for rotating the spindle about a rotational axis, with the rotational axis of the rotor extending parallel and at a distance to the rotational axis of the spindle. The gear unit includes a nut placed on the spindle for movement in longitudinal direction of the spindle when the spindle rotates, and a first pair of helical gears which are in mesh with one another for reducing the output speed of the gearmotor as transmitted to the spindle.

Abstract: An apparatus for limiting deflection of the armature shaft 38, 38', 103 of an electrically powered tool, such as a hand held saw 10 or drill 91. In saw 10, the armature shaft 38, 38' extends as a cantilever from the motor 14 and has a geared connection 58, 60 to an arbor 44 for driving the saw blade 18. An arrangement for limiting the deflection of the armature shaft 38, 38' comprises a pilot member 72, 84 and a socket 68, 82 associated, respectively, with one and the other of the armature shaft and a motor housing supported wall. The socket 68, 82 is larger in cross-section than that of the pilot member 72, 84 and limits transverse deflection of the armature shaft 38, 38' away from its axis of rotation A. If the saw 10 stalls in the material being cut, force is transmitted from the geared connection 58, 60 to the armature shaft 38, 38'.

Abstract: A mixer gearbox assembly for driving a mixer shaft capable of receiving either a complete electric drive motor on a first face of the gearbox housing for operatively coupling with a first end of a long cross-shaft in the housing, or alternatively a partial electric drive motor on a second face of the gearbox housing for operatively coupling with an opposite end of the cross-shaft. In an alternative configuration for use with only a partial motor, an assembly containing otherwise identical components is provided with a short cross-shaft replacing the long cross-shaft, which short shaft is supported by a single bearing and is colinearly matable only at the outer end thereof with the drive shaft of a partial electric motor. The rotor and short shaft act as a unitary structure when assembled.

Abstract: A motor casing containing a motor has an end wall with bosses and bolt receiving holes positioned radially inward relative to a stator mounted in a circumferential wall of the motor casing. A gear unit with a gear casing includes bosses and bolt holes on its periphery mating with bosses and bolt receiving holes of the motor casing to thus enable a substantial reduction in size and weight of the gear casing.

Abstract: In a gear which can be flanged onto an electric motor, especially a low-clearance planetary gear, with a hollow shaft to make a positive connection with the electric motor output shaft, an easily manufactured and reliable centering system is to be provided between the gear and the electric motor (6). To this end, the section of the hollow shaft (9) accepting the output shaft (10) of the electric motor is centrically secured on roller bearings (11) and the face of the drive flange is radially freely centerable (7, 8) in relation to the mating surface of the electric motor. To enable a drive with as uniform a basic structure as possible to be connected to electric motors with different connecting geometries, the gear has an interchangeable mating plate (2) forming its connecting flange and a hollow shaft into which compensating sleeves (12) can be inserted to accept electric motor output shafts of different diameters.

Abstract: A driving unit comprising an electric motor and a reduction gear unit preferably intended for an industrial robot. A gear case (11) supports a motor (10) with a shaft (12) extending into the gear case and provided with a bevel pinion (13). An intermediate shaft (15) is rotatably journalled with two bearings (16). On the intermediate shaft are fixed a larger bevel gear (14) and between the bearings a smaller cylindrical gear (17). An output shaft (20) provided with a larger cylindrical gear (18) is rotatably journalled and parallel with the intermediate shaft (15). The gears are arranged such that the bevel pinion (13) is in engagement with the larger bevel gear (14) and the smaller cylindrical gear (17) is in engagement with the larger cylindrical gear (18). The motor shaft (12) is oriented approximately perpendicular to the output shaft (20).

Abstract: A transmission unit mounted on the machine base of an office automation machine and covered with a cover and controlled to turn a first roller and a second roller, including a gear transmission mechanism, a first roller transmission mechanism driven and a second roller transmission mechanism respectively driven by the gear transmission mechanism to turn the rollers, wherein the gear transmission mechanism includes a motor, a rounded seat raised from the machine base, a drive gear mounted on the rounded seat and coupled to the motor, an annular gear holder revolvably mounted around the rounded seat and having an upright gear shaft, an upright axle raised from the machine base adjacent to the rounded seat, a crank having a pivot hole at one end coupled to the upright axle and a gear shaft at an opposite end, a first planet gear revolvably mounted around the gear shaft of the crank and driven by the drive gear to turn the first roller transmission mechanism, a second planet gear revolvably mounted around the gea

Abstract: A gear motor assembly having a three-part molded housing consisting of a gear case having one open side for housing a reduction gear train, a rotatably driven output shaft and coaxial cam; a circuit board cover having one open side for housing a printed circuit board and motor control components including a cam operated switch for periodically deenergizing an electric DC motor also mounted on the circuit board, and a gear case cover interposed between the gear case and circuit board, which is welded to the gear case and circuit board cover to effect a sealed protective housing.

Abstract: An actuator device designed to prevent intrusion of water into a control section housing chamber due to an breathing operation and hence malfunction and fracture of a control section. In the actuator device, a ventilating opening is provided in a partition between a mechanism section housing chamber and a control section housing chamber for communicating the mechanism section housing chamber and the control section housing chamber, a cylindrical protrusion is provided in the partition on the side of the mechanism section housing chamber so as to surround the ventilating opening; and a drain hole for communicating said mechanism section housing chamber with outside air is provided at a position lower than that of the ventilating opening of said mechanism section housing chamber.

Abstract: A transmission mechanism for a scanner includes a frame having a plurality of holes with different sizes and a series of gears mated with each other through different numbers of teeth. Due to different locations of where the transmission mechanism are mounted, the frame is able to be adapted to different type of motors.

Abstract: A power transmitting apparatus for use in a transportation vehicle includes a motor shaft of a vehicle-driving motor, an input shaft operatively connecting with the motor shaft, output shafts provided in parallel with the input shaft to be connected with driven wheels of the vehicle, and a transmitting mechanism for transmitting driving power from the input shaft to the output shafts. The opposite end portions of the motor shaft are supported by a pair of motor shaft bearings, and one of the motor shaft end portions supports one of the opposite end portions of the input shaft in such a manner that the motor shaft can transmit driving power from the vehicle-driving motor to the input shaft. The other end portion of the input shaft is supported by another bearing, and the transmitting gearing is disposed adjacent to the other end portion of the input shaft remotely from the section where the one end portion of the input shaft is supported.

Abstract: A gearhead with an axially-extending input shaft connected to a motor shaft. A pinion gear and bearing assembly is adapted to connect to the motor shaft. The pinion gear is rotatably and sealably mounted to a recessed mounting surface of the housing to reduce noise, prevent entry of dirt and dust and provide a floating connection. The mounting is achieved with a double-sealed bearing which is configured to float with respect to the housing so that a high tolerance connection is maintained between the pinion gear and the gearhead while accommodating motor shaft misalignment. The invention also relates to a method for mounting the motor shaft onto the gearhead by inserting the motor shaft into the input pinion gear, securing the gearhead to the motor and clamping the input pinion gear to the motor shaft.

Abstract: A transmission mechanism is capable of effectively attenuating vibrations generated thereby during operation by converting vibrations into heat energy. The base plate is provided with a plurality of flexible connecting ribs and a plurality of substantially sectorial openings formed alternately around a motor base part for holding a motor and bearing parts for supporting the shafts of the gears. Each of the gears has a rim provided on its outer circumference with teeth, a hub and flexible arms connecting the rim to the hub. Vibrations generated by the motor and those generated by the gears strain the flexible connecting ribs of the base plate and the flexible arms of the gears, the strains of the flexible connecting ribs and the flexible arms are converted into heat energy in the end and the heat energy dissipates, so that the variations are attenuated and noise attributable to the vibrations is suppressed.

Abstract: Gearbox with a shaft bearing (33) which is accommodated in a bearing eye (7) adjacent to an assembly opening (2), the bearing eye (7) being slotted towards the assembly opening (2). The assembly opening (2) and the bearing (33) are covered by a cap (36). The cap (36) contains a bore (35) for accommodating the major part of the axial extent of the bearing (33). The bearing bore of the bearing eye (7) is, by this means, substantially relieved of the support function and is only used for centring the bearing and the cap, whereas the support of the bearing takes place by means of the cap. The gearbox casing can contain an intermediate wall (8) between the assembly opening (2) and the output-end wall (13) for supporting the output shaft. So as to make it possible to assemble the output-end gearwheel (14) without a special assembly opening, the intermediate wall (8) is lopped at the level of the support (18) of the output shaft.

Abstract: A gear mechanism comprises a housing, an input gear of helical gear supported by the housing for rotation in first and second rotational directions and adapted to be connected to a rotational power source, an output gear of a helical gear supported by the housing for rotation, a first gear train for transmitting the rotational power from the input gear to the output gear when the input gear rotates in the first rotational direction, a second gear train for transmitting the rotational power from the input gear to the output gear when the input gear rotates in the second rotational direction.

Abstract: An integrated drive system for driving one or more elongate flexible members of a displacement apparatus used in a media handling system. The integrated drive system includes an integral housing and a plurality of shafts fixedly secured to the integral housing. A first linkage device is mounted on one of the shafts and includes a capstan, which may be adapted to receive and retain one or more elongate flexible members, and a first gear integrally formed therewith. A second linkage device is mounted on another shaft and includes a second gear which engages the first gear, and a third gear integrally formed therewith. A motor assembly may also be provided which includes a motor operatively connected to a fourth gear which engages the third gear, a motor shaft, and an overload clutch assembly which prevents the fourth gear from being rotatingly driven with the motor shaft at predetermined intervals. Methods for assembling an integrated drive system and a motor assembly are also disclosed.

Abstract: Method and apparatus having a single continuous track of segments, each segment having its own profile, and wherein ones of the segments have the same profile, for generating a varying motion output.

Abstract: A drive unit with a motor (1), in the drive shaft (5) of which a plug-in pinion (6) with a conical shaft (6a) which can be mounted into a similarly shaped conical seating bore (5a). The plug-in pinion (6) has on its end face a collar bolt (8) proximate to its toothing (7). The drive shaft (5) has an external groove (5b) proximate to the seating bore (5a). A tool is used to mount and dismount the plug-in pinion (6) by grasping the collar bolt (8) and the external groove (5b) and causing them to move relative to one another.

Abstract: A plurality of rotating bodies each consisting of an armature, a permanent magnet rotor, or the like are rotatably supported in parallel and rotary shafts thereof are gear-connected to each other so that they may be interlockingly rotatable. Between the mutually nearest positions between respective outer peripheries of the adjacent rotating bodies and inner wall surfaces of the relevant yoke on first- or second-, half rotation sides of the rotating bodies as viewed in the rotation direction, partitioning walls are disposed so as to block the passage of the magnetisms between the adjacent rotating bodies while, on the other hand, opening portions are secured on the other rotation sides thereof as viewed in the rotation direction so as not to block the passage of the magnetisms between the adjacent rotating bodies, whereby forces of magnetic attraction or repulsion act to promote the interlocking rotations of the rotating bodies.

Abstract: The invention is a compact gear drive with a maximum transmission range for a constant crown gear diameter and constant axial displacement. A pinion is mounted on a bearing remote from the crown gear. The pinion is constructed as a hollow shaft and is fictionally connected to a drive shaft of a driving motor.

Abstract: A driving system for an electric vehicle which drives wheels thereof with the aid of an AC motor via an inverter while a battery is used as a power source is constructed such that the primary side and the secondary side of the AC motor are rotatably supported in a motor frame. One of the primary and the secondary sides of the AC motor is operatively connected to a power transmission shaft for one of a left-hand wheel and a right-hand wheel via a reversible type speed reducing mechanism while the direction of rotation of the power transmission shaft is reversed relative to that of the one of the primary and secondary sides. The other one of the primary and the secondary sides of the AC motor is operatively connected to a power transmission shaft for the other one of the wheels via a non-reversible type speed reducing mechanism while the direction of rotation of the power transmission shaft is kept unchanged relative to that of the other one of the primary and secondary sides.

Abstract: A multi-functional energy saving power transmission mechanism has a plurality of miniature motors assembled together into a motor assembly, a down-speed gear set and an output gear set. More than one down-speed gear set can be arranged in sequence for further reducing the speed of the motor assembly and generate a larger torque output. Each down-speed gear set has a gear mounting block with a main central driving shaft. One end of the shaft has a spur gear or an annular gear and the other end has a spur gear. The gear mounting block also has a plurality of gear mounting holes disposed around the central driving shaft. A plurality of minor driving shafts can be selectively engaged with the gear mounting holes so as to make the driving connection between the down-speed gear sets or to the output gear set in a smoother manner.

Abstract: A submersible gearmotor including a liquid resistant housing with radially inwardly extending partitions which form at least two shaft receiving chambers. The separate chambers act as protective regions between the internal components of the gearmotor and an outside liquid medium when submersed. The gearmotor also includes a tandem seal arrangement including an inboard seal located inside the housing and an outboard seal located outside the housing. The seals prevent the outside liquid medium from entering the gearmotor where the housing intersects with the rotating output shaft. The gearmotor further includes a leak detection system consisting of moisture sensing probes mounted inside one or both of the receiving chambers.

Abstract: An arrangement for driving at least one roller of a roller unit for transporting web-shaped materials, such as X-ray sheet films or stimulatable phosphorous foils with substantially constant speed in a device for exposing or scanning these materials, the arrangement comprising a stepping motor having a motor output shaft, a friction drive having a drive input shaft, and a vibration damping mechanism provided between said motor output shaft and the drive input shaft. The drive is formed so that a ratio of the drive and a diameter of the roller is selected so that at least 20 steps of the stepping motor corresponds to a transporting path of the web-shaped material of one millimeter.

Abstract: Disclosed is a series and a series group of orthogonal gear reducers with motors. A motor cover is disposed separately from a gear box. In each of sub-series (frame number) wherein the gear boxes have the same fitting dimensions (sizes) to be mounted to a mating machines, the following requirements are satisfied: 1 The fitting dimension between the motor cover and the gear box is made constant; 2 An axial shifted amount between a hypoid pinion and a hypoid gear is made constant; 3 an outside diameter of the hypoid gear is made almost constant; and 4 a distance between the center of the hypoid gear, and the mounting surface for the motor cover and the gear box is made constant.

Abstract: In a driving mechanism of a kneading blade of a bread production device driven by a motor through the reduction gear, a reduction ratio of the reduction gear is adapted to be more than 10:1. By this, the motor which drives the kneading blade is miniaturized.

Abstract: A velocity-reduced drive system (1) is used to operate a movable member of a video camera or a combined camera-and-VTR unit at a reduced velocity. The drive system comprises a micro or flat motor (5) supported in cases (2), (3) and (4), a worm gear (6) rotatably supported by the cases, a worm wheel meshed with the worm gear, first power transmission means (11), (12) and (12) for transmitting rotational force of the motor (5) to the worm gear (6), and second power transmission means (14), (15) and (16) for transmitting rotational force of the worm gear (6) to an output shaft (7) to be coupled to the movable member.

Abstract: An improved transmission gear box for miniature motor is equipped with a motor-mounted round plate having a number of equally spaced protrusions or recesses disposed on the periphery thereof. The round plate secured to the case of a motor is provided with a round through hole at the center thereof and a pair of symmetric oval-shaped through holes are disposed at each of the opposite sides of the round hole, and a transmission gear set is operationally associated with and supported by the round plate. The shaft of the miniature motor disposed through the central round hole of the round plate is provided with a gear at the top end thereof so as to permit the engagement of the same to the transmission gear set. A cap having a number of corresponding recesses or protrusions disposed at the periphery of the bottom end thereof can be tightly engaged with the round plate.

Abstract: A transmission casing embodying the concepts of the present invention has a one-piece body portion with front and rear faces. The first of two major openings penetrates the front face, and the second of the two major openings penetrates the rear face. A pair of axially spaced front and rear drive gear bearing supports are provided in the transmission casing, and the drive gear bearing supports are axially accessible through the first major opening. A pair of axially spaced front and rear idler gear bearing supports are laterally displaced from the respective drive gear bearing supports and the idler gear bearing supports are also axially accessible through the first opening. A final drive bearing retainer is demountably secured within the second major opening. A final drive rear bearing support is carried by the final drive bearing retainer. An aperture for receiving the final drive front bearing support penetrates the first face and is aligned with the final drive rear bearing support.

Abstract: In a geared motor for a self-traveling carrier, a projected area in an advancing direction of the carrier is made small to reduce the space required around a track. Despite the fact that the geared motor being is a single type of a geared motor (the same geared motor), it is possible to select a suitable mounting mode from among various mounting modes, thus permitting a smoother operation of a physical distribution system as a whole. For example, in a geared motor for a self-traveling carrier, a reduction mechanism housed in a gear box incorporates an output shaft with a wheel mounted thereon, an output shaft gear, an intermediate shaft disposed in parallel with the output shaft, an intermediate pinion and a hypoid gear both mounted on the intermediate shaft, and a hypoid pinion mounted on a motor shaft. The motor shaft is disposed between the intermediate shaft and the output shaft orthogonally thereto.

Abstract: An epicyclic gear comprises housing, pinion forming on an input shaft supported in the housing, at least three planetary gears supported in the housing via shafts and geared with the pinion, an internal gear supported in the housing via an output shaft and surrounding and geared with the planetary gears, a passage for lubricating oil through the housing into the shafts of the planetary gears, a conduit supported on at least one shaft and for conveying oil from the shafts towards the center of the housing via outlet jets, and a bridge supported between at least two shafts and supporting the outlet jets, wherein at least one planetary gear overlaps the remaining adjacent planetary gears in an axial direction of the pinion without mutual interfering with each other.

Abstract: In a variable speed geared motor constructed by combining an inverter motor controllable in rotational speed by inverter drive with a gear reducer, the gear reducer is of a two-stage type, and a reduction ratio i of the gear reducer is suppressed so that i.ltoreq.N holds where N stands for a maximum reduction ratio of the inverter motor at which a constant torque characteristic can be ensured. Further, in a series of variable speed geared motors each satisfying the above conditions, a common ratio R of a series of reduction ratios i of the variable speed geared motors is set to 1.2-1.5. For example, the series is set to 2, 3, 4, 5, 6, and 8.Accordingly, the geared motor can be constructed lightly in weight, compactly, and at low costs, and it can be economically used in a rotational speed region of 200-900 rpm which is an ordinary region in driving of a pump or a high-speed conveyor.

Abstract: A quick return mechanism for a drilling machine comprises an input shaft, an output shaft, an overdrive gear train and a speed-reduction gear train, each disposed between the input and output shafts, a first clutch for connecting the output shaft to the input shaft through the over-drive gear train when a motor for driving the input shaft rotates in the quick-return direction and disconnecting the output shaft from the input shaft when the motor rotates in the feed direction, a second clutch selectively set at a first position and a second position, for connecting the output shaft to the input shaft through the speed-reduction gear train at the first position when the motor is rotated in the feed direction, and disconnecting the output shaft from the input shaft through the speed-reduction gear train at the second position, when the motor rotates in the quick-return direction, and a rotation=linear-movement converting unit for setting the second clutch at the first position when the motor rotates in the feed

Abstract: Mulching apparatus having a tapered tooth structure which prepares a planting spot such that, when the apparatus is withdrawn from the ground, mulched residue remains within or adjacent to the planting spot. The apparatus may be removably attached to the boom of an excavator type vehicle and drivingly coupled to the vehicle's hydraulic drive system. The machine operator actuates and manoeuvres the vehicle, boom and mulching apparatus to rapidly prepare a series of mulch-containing planting spots for planting seeds or seedlings, for example in large scale reforestation projects.

Abstract: In a gear drive device of a railway motor car having a larger gear fixed on an axle and a smaller gear fixed on a rotation shaft of a traction motor, tooth trace of the smaller gear or that of the larger gear is twisted in a manner that the teeth of the smaller and larger gears are engaged in parallel with each other when the axle is deflected due to the load of the railway motor car.

Abstract: A slip clutch mechanism is provided with a clutch shaft rotated by a driving power source, a pair of slip pinions supported on the clutch shaft in such a manner as to be rotatable around the clutch shaft, and a pair of slip washers supported on the clutch shaft, in such a manner as to be rotatable as unified with the clutch shaft and movable in the axial direction of the clutch shaft and as to get into frictional contact with the individual sliding pinions at the inner sides thereof. A compression coil spring member is interposed between the slip washers and brings the slip washers into frictional contact with the slip pinions. An output shaft is rotated by one of the pair of slip pinions.

Abstract: In a drive with twin helical drive gears on an axle driven by a motor with pinions at either end wherein the moto housing and axle housing are axially located by a key in mating keyways, an offset key is used to obtain axial housing adjustment by the amount of the key offset. The pinions are mounted to the motor with their teeth substantially aligned and the gears are mounted to the axle with their teeth substantially aligned, and the housings are axially positioned by an offset key to compensate for errors in tooth alignment to assure that gear backlash is centralized on both ends of the motor when the rotor is substantially centered in its range of end play.

Abstract: In a motor-equipped reduction gear device with a pre-stage, two covers, which have been indispensable in the past, namely a joint cover and a pre-stage cover, are integrated into a one-body cover (130). Also, the diameter (D1) of the addendum circle of the pinion (110) mounted on the tip of the motor shaft 108 is designed to be smaller than the diameter (D2) of the portion of the motor shaft (108) which extends into the one-body cover (130). This allows the one-body cover (130) to be mounted with the pinion (110) already attached to the tip of the motor shaft (108). The one-body cover (130) can freely and easily be attached to the motor (102) and the gear box (106). As a result, the number of parts is reduced and light weight and compactness are achieved, and accuracy of the center distance and parallelism are improved because cumulative machining errors can be avoided. Furthermore, cost down and improved rigidity are achieved and the number of factors which may cause oil leakage is decreased.

Abstract: The driving power transmitting apparatus for use in twin shaft type extruder is constituted by a first screw driven by a power transmission shaft through a coupling member, and a second screw is driven by two parallel sets of idle plane gear, an idle shaft and an idle helical gear and a helical gear secured to the drive end. The two sets of idle plane gear are driven by a plane gear which is mounted on the power transmission shaft to be rotatable. The plane gear is driven by a prime mover through a coupling.