Abstract: A speed reducer includes an outer tubular member, internal tooth pins, oscillating gears and a carrier block. The outer tubular member has pin grooves on an inner circumferential surface thereof. The internal tooth pins are rotatably placed in the pin grooves. The oscillating gears have external teeth smaller in number than the pin grooves, and the oscillating gears are oscillatorily rotatable with the external teeth engaging with the internal tooth pins. The carrier block is cooperatively connected to the oscillating gears such that the oscillating gears are allowed to oscillatorily rotate relative to the carrier block and restricted from rotating on own axis relative to the carrier block. A displacement restricting member configured to restrict the internal tooth pins from being displaced inwardly in a radial direction of the outer tubular member is disposed between the outer peripheries of the oscillating gears adjacent to each other.

Abstract: A bending meshing type gear device includes a wave generator; an external gear that is disposed on an outer periphery of the wave generator, and is bendably deformed as the wave generator rotates; a first internal gear meshing with the external gear; a second internal gear that is disposed on one side in an axial direction of the first internal gear to mesh with the external gear; and a wave generator bearing that is disposed between the external gear and the wave generator in a state where movement in the axial direction of the wave generator bearing is restricted. The external gear includes a protrusion on an inner periphery of the external gear. The protrusion engages with the wave generator bearing to restrict movement in the axial direction of the external gear.

Abstract: A speed reduce according to an embodiment of the present invention includes a case having an outer diameter D, a plurality of crankshafts, and a carrier supporting the crankshafts in a rotatable manner. The carrier is rotatable by the crankshafts relative to the case. Each of the plurality of crankshafts includes a plurality of eccentric members each of which has a diameter dc1 and a crank journal that has a diameter dc2. The crankshaft further includes n1 needles that are arranged around each of the plurality of eccentric members and each of which has a diameter size dr1, and n2 needles that are arranged around the crank journal and each of which has a diameter size dr2. In the speed reducer, relational expression 5.5?D/dc1?7.0 is satisfied.

Abstract: A bending meshing type gear device includes a wave generator, an external gear which is bent and deformed by the wave generator, and internal gears which meshes with the external gear. One of the external gear and the internal gears is formed of a resin, and the other of the external gear and the internal gears is formed of a high thermal conductivity material having thermal conductivity higher than that of the resin. The gear device further include an abutment member which is connected to the internal gear and abuts the external gear, the internal gear is formed of the resin, the external gear is formed of the high thermal conductivity material, and the abutment member is formed of a high thermal conductivity material having thermal conductivity higher than that of the resin.

Abstract: Disclosed is a precision rotational transmission mechanism, comprising a fixing support (1), wherein the fixing support (1) is provided with a rotational case (112), which is connected to an electric motor and is provided with a first transmission mechanism (1122), a second transmission mechanism (33) and an output member (19) therein, an end of the first transmission mechanism is connected to the electric motor, the other end is connected to the second transmission mechanism, and the second transmission mechanism drives the rotational case to rotate simultaneously via the output member. The transmission mechanism has a simple and compact structure, has a larger output shaft which has bigger rigidity and can output from two ends, has a lighter overall weight which is suitable for industrialization and mass production, has a large transmission ratio, high transmission efficiency, small return difference, strong carrying capacity, strong impact resistance capacity, and long service life.

Abstract: A speed reducer comprises a sleeve-shaped rotation member, a rear carrier, a front carrier, three driving assemblies, a third bearing set, a fourth bearing set, and three wheels. When a shaft of a motor inserts into the front central through hole, each axial hole of each wheel, and the rear central through hole and then drives each driving assembly to rotate, the first bearing set and the second bearing set both operate to an inner peripheral of each corresponding through hole of each wheel and the outer rollers of each wheel drive the inner rollers of the sleeve-shaped rotation member due to the eccentric arrangement of the first rod section and the second rod section of the eccentric rod so as to drive the sleeve-shaped rotation member to rotate and then achieve the effect of reducing speed.

Abstract: A ball valve (1), particularly for use in motor vehicle refrigerant circuits, having an actuator (2), a shaft (3) including a shaft bearing (5), a ball (4) including a ball passage (16), and a valve housing (13). A fluid shaft seal (8) is arranged in the shaft bearing (5) between an upper shaft seal (6) and a lower shaft seal (7), wherein the fluid shaft seal (8) is formed by a cavity (18) in which a sealing fluid is provided, and that the sealing fluid is in contact with the shaft (3) in a sealing region (19) such that the sealing fluid has a sealing effect in the axial direction, wherein the cavity (18) is at least partially formed by a diaphragm (11) and is limited on the shaft (3) by the shaft seals (6, 7), and that the diaphragm (11) is formed in such a way that pressure can be applied to the side facing away from the sealing fluid.

Abstract: Compared to derailleur bicycle chain transmissions, internal hub transmissions for bicycles have higher friction and a lower torque capacity. In addition, bicycle hub transmissions are generally incompatible with alternate drive arrangements such as direct-drive, or different mounting options such as mono-blade mounting. The present invention addresses these concerns by employing bevel gears with roller teeth in a planetary bicycle hub transmission. The bevel gear configuration allows larger planet gears, which gives sufficient circumferential space for roller teeth to reduce the meshing friction. The larger planet gears also increase the allowable torque. Furthermore, the bevel gear configuration facilitates the high ratios required for direct-drive, and results a hub structure highly compatible with mono-blade mounting. With this is view, the hub is designed for both chain-drive and direct-drive, and for both double-blade and mono-blade mounting.

Abstract: A micro-electromechanical system (MEMS) driving arrangement comprising a driven wheel comprising (n) teeth about an outer periphery thereof, an actuator ring around the driven wheel, itself comprising (n)+(x) teeth about an inner periphery thereof, wherein the (n)+(x) teeth of the actuator ring progressively engage and disengage subsets of the (n) teeth of the driven wheel; a driving actuation assembly, coupled to the actuator ring, for driving the actuator ring in a hysteresis-type motion so as to cause rotation of the driven wheel, wherein after one full cycle of engagements and disengagements between selective subsets of the (n) teeth of the driven wheel with selective subsets of the (n)+(x) teeth of the actuator ring, the driven wheel rotates by (x) teeth corresponding to [(360)(x)/(n)]°.

Abstract: One-way clutches OWC1 and OWC2 are provided on output sides of transmissions TM1 and TM2, and the transmissions TM1 and TM2 mechanically lock when the output member 121 of the one-way clutches OWC1 and OWC2 is reversely rotated to the backward side. Clutch mechanisms CL1 and CL2 are interposed between the output member 121 and a driving target member 11 connected to a driving wheel 2. According to uphill start conditions, a controller 5 makes any one of the clutch mechanisms CL1 and CL2 enter ON state when a vehicle-backward-movement prevention control is determined to be required and the controller 5 makes the clutch mechanisms CL1 and CL2 enter OFF state when the vehicle-backward-movement prevention control is determined to be not required. Thus, it is possible to provide a vehicle driving system capable of performing a hill hold assist function with a simple control.

Abstract: A gear ratio control device includes a controller configured to control gear ratio in a vehicle. The controller is configured to adjust an eccentricity of first supporting points of the eccentric discs so that, in the event of starting a power source in a state in which the power source is stopped and the vehicle is traveling, the gear ratio at a continuously variable transmission is at a target value, in parallel with performing start control of the power source.

Abstract: Disclosed is a unison ring assembly. The assembly comprises a first unison ring and a second unison ring concentrically aligned along a principal axis, the first and second unison rings being rotatable about the principal axis. The assembly further comprises a gear mechanism configured to simultaneously rotate the first and second unison rings about the principal axis.

Abstract: A gear transmission includes an eccentric-oscillating-type first reduction gear unit having a first internal gear, a first crankshaft with at least one first eccentric body defined thereon, a first input gear fixed to the first crankshaft and a first output member, as well as an eccentric-oscillating-type second reduction gear unit disposed coaxially with the first reduction gear unit and surrounding the first reduction gear unit. The second reduction gear unit has a second internal gear, a second crankshaft with at least one second eccentric body defined thereon, a second input gear fixed to the second crankshaft and a second output member. The first output member is engaged with the second input gear. Further, the first internal gear is disposed, in the axial direction of the gear transmission, between the second input gear and the at least one second eccentric body.

Abstract: A cage of each of ball bearings arranged on respective outer peripheries of eccentric portions of a motor shaft has an annular base portion interposed between an inner ring and an outer ring and a plurality of partition wall portions for forming pockets together with the base portion. In a first ball bearing, part of the base portion protrudes axially outward from the inner raceway and forms an oil receiving portion that receives lubricating oil from the second rolling bearing side, at a portion around the rotation axis and axially outward of the first rolling bearing.

Abstract: A gear reduction assembly may include an input shaft, a first spur gear, and a second spur gear. The first and second spur gears may be coupled to one another. At least one of the first spur gear and the second spur gear may be associated with the input shaft such that the input shaft drives at least one of the first and second spur gears. The gear reduction assembly may further include a first internal gear engaged with the first spur gear, a second internal gear engaged with the second spur gear, and a hub associated with the first internal gear The first and second internal gears have a first number of teeth and a second number of teeth, respectively, and the first number of teeth differs from the second number of teeth by from one to five teeth. The gear reduction assembly may be included in a winch.

Abstract: A mechanical speed variator is provided with eccentric masses having a balanced structure. The variator includes a drive shaft, provided with a cam composed of a circular disk eccentrically mounted on the drive shaft, which drives the driven shaft in rotation with interposition of a series of eccentric masses, each of them being composed of a circular disk with eccentric circular hole in which another mass of lower dimensions is ratably housed. The larger mass is housed and rotates inside the eccentric hole of a ring coupled with bolts to a flange and counter flange, respectively mounted on the driven shaft and the drive shaft.

Abstract: A continuously variable transmission apparatus includes an input shaft, an output shaft, a continuously variable transmission mechanism, a differential gear mechanism and a bypass shaft. The continuously variable transmission mechanism is placed between the input shaft and the output shaft and is adapted to conduct rotation of the input shaft to the differential gear mechanism after changing a speed of the rotation. The bypass shaft is placed coaxially with the input shaft and the output shaft and is adapted to conduct the rotation of the input shaft to the differential gear mechanism while bypassing the continuously variable transmission mechanism. The differential gear mechanism is adapted to conduct the rotation from the continuously variable transmission mechanism and the bypass shaft to the output shaft.

Abstract: The invention relates to a display device (54) for an actuator having at least one mechanical display element (10, 11) and a variable speed gear unit, particularly a signal gear unit designed as a variable speed gear unit, having at least two gears with differing transmission ratios, wherein there is a mechanical switching arrangement with which the different gears and/or transmission ratios of the variable speed gear unit can be selected and/or switched even when the display device is mounted operationally ready in a housing without intervention into the housing and without opening the housing from outside, and/or wherein the resolution of the display device (54) and/or the movement of the at least one display element (10, 11) on the actuating path to be displayed of a respective actuator and/or a respective armature can be selectively adjusted. The invention furthermore relates to an actuator having a said type of display device (54).

Abstract: An automatic multi-speed gear system including an input axle, a first arm configured to couple with the input axle allowing for independent rotational movement of the input axle along the input axle axis, a first axle configured to couple with the first arm allowing for independent rotational movement of the first axle along a first axle axis, a second arm configured to couple with the first axle allowing for independent rotational movement of the first axle along the first axle axis, a second axle configured to couple with the second arm allowing for independent rotational movement of the second axle along a second axle axis, and an output axle. The first arm and the second arm are configured to move from a high-speed misalignment position to a low-speed alignment position where the second axle orbits the first axle.

Abstract: The present invention relates to a continuously variable transmission apparatus, which is characterized by comprising: an input shaft transferred with torque inputted from the outside; a plurality of driven gears which are arranged around the circumference of the input shaft as a certain phase difference and transferred with the power from the input shaft; a variable cam of which the turning radius can be varied by an external load; a variable input link which is coupled to and transferred with the torque of the input haft and allows the rotation thereof; a one-way clutch which is transferred undirectionally with the bidirectional torque to be transferred to the driven gears, respectively, and rotates the driven gears in one direction; a plurality of cam shafts which contact the one-way direction clutch internally or externally; and a plurality of output links, each of which one end revolves together with the variable cam around the center of rotation of the variable input link and the other ends of which are

Abstract: A speed reducer includes a rotation member including internal main rollers; a rear carrier including a central through hole and eccentric stepped-diameter holes; a front carrier including a central through hole and recesses; a front wheel including a first through hole, second through holes, and front rollers on an edge to be in contact with the main rollers; a rear wheel including a third through hole, fourth through holes, and rear rollers on an edge to be in contact with the main rollers; coupling members for holding the front carrier, the front wheel, the rear wheel, and the rear carrier together; outer gear assemblies each rotatably disposed in the eccentric stepped-diameter hole, the fourth through hole, the second through hole, and the recess; and a central gear unit being in gear mesh with the outer gear assemblies.

Abstract: In a gearing, in particular coaxial gearing, hollow shaft gearing, hypoid gearing, axial gearing or linear gearing, with a driving element (7), an element (3) and an output element (11), a stepping-up and transmission of a driving torque between driving element (7) and output element (11) are to take place via a plurality of movable tooth segments (5).

Abstract: A sun gear is supported by an eccentric portion of a rotor via a bearing and rotatable eccentrically to the rotor axis. A ring gear includes inner teeth via which the ring gear is meshed with outer teeth of the sun gear. An output shaft is located adjacent to the sun gear in the axial direction. A fitted portion of the output shaft is loosely fitted to a fitting portion of the sun gear to transfer rotation of the sun gear to the output shaft. The bearing has a center position located in a fitting overlap region between the fitting portion of the sun gear and the fitted portion of the output shaft in the axial direction and/or located in a gear overlap region between the outer teeth of the sun gear and the inner teeth of the ring gear which are meshed with the outer gear.

Abstract: Infinitely variable motion control (IVMC) provides motion control without any requirement for changing gears or use of a clutch. A spur gear transgear, defined as a system having an input, an output and a control, a variable pitch cam having an eccentric inner and outer cam assembly, a driver and a one-way clutch or ratchet bearing assembly may be used to form a cam controlled speed converter converting a given input to a variable or constant output speeds and further having direction control. All IVMC's, cam controlled IVMC, input compensated IVMC and pitch controlled IVMC may be utilized to form various embodiments of infinitely variable generators, transmissions and compressors/pumps.

Abstract: A vehicle driving system 1 includes a first and second engines ENG1 and ENG2, a first and second transmissions TM1 and TM2 with first and second one-way clutches OWC1 and OWC2 provided in each output portion respectively, a driving target member 11 connected to output members 121 of the one-way clutches OWC1 and OWC2 in common via clutch mechanisms CL1 and CL2, a main motor/generator MG1 connected to the driving target member 11, and a controller 5. The controller 5 disconnects the clutch mechanisms CL1 and CL2 when a vehicle runs rearward, the transmissions TM1 and TM2, and runs the vehicle rearward by a reverse rotation operation of the motor/generator MG1. The controller otherwise holds the clutch mechanisms CL1 and CL2 connected at the time of a start on an uphill and obtains a hill hold function using a rearward running blocking operation through the transmissions TM1 and TM2.

Abstract: An automobile driving system includes an engine and a transmission. The transmission includes a variable gear ratio mechanism and a gear ratio of the transmission can be set to infinity. A one-way clutch is provided at an output portion of the transmission. At a time of a engine stopping controller controlling to stop the engine, a transmission-and-control device uses inertia from the engine up to an input member of the one-way clutch as assisting force for driving operations of the variable gear ratio mechanism to change the gear ratio at the transmission to infinity or close to infinity, before the engine actually stops.

Abstract: An output-side swing arm is adapted to be swung about a swing axis thereof when the output-side swing arm is urged by a corresponding part of an input-side swing arm, which is driven by a force transmitted from an input shaft. An adjusting mechanism adjusts an amount of swing of the output-side swing arm by changing a location of a point of action of the input-side swing arm relative to the output-side swing arm in a radial direction of the swing axis of the input-side swing arm.

Abstract: Through holes are formed in a revolving gear which revolves while being engaged with a ring gear, and penetration pins for extracting rotation of the revolving gear are inserted in the through holes. The inner circumference of each through hole has a shape which becomes narrow toward its one end. A sliding member having a shape which becomes thin toward its one end is engaged with each penetration pin. The sliding member is biased in a tapered direction thereof by a biasing member to be in contact with the inner circumference of the through hole.

Abstract: A power seat height adjuster mechanism for a seat of a vehicle includes a motor having an output shaft, a speed reduction mechanism cooperating with the output shaft of the motor to reduce an output speed of the motor, a nut drive mechanism cooperating with the speed reduction mechanism and having a translatable output member to rotate an adjustment component of the seat to adjust a height of the seat, and a locking mechanism cooperating with the speed reduction mechanism to allow the height of the seat to be adjusted and to prevent the height of the seat from moving once the height has been adjusted.

Abstract: A continuously variable transmission includes a one-way clutch, a plurality of linking members, and a variable gear ratio mechanism. The one-way clutch includes an input shaft, a plurality of eccentric discs, a first crank member, a second crank member, an output member, an input member, and an engaging member. The input shaft is rotatable about an input center axial line under the rotational force. The plurality of eccentric discs is disposed around the input center axial line at equal intervals in a circumferential direction.

Abstract: A system and method for providing a constant output from a variable flow input comprises a liquid flow energy input, for example, air or water for driving a constant speed generator. An inner and outer cam assembly is controlled by a control input to achieve varying eccentricity and control the output speed at an output shaft to be constant despite a varying rotational velocity input at an input shaft. A feedback control may be provided between one of the input shaft and the output shaft and the inner and outer cam assembly to maintain constant output by varying the eccentricity. The constant output may drive a constant speed generator having an infinitely variable torque generator. In this manner, a power grid may be provided with constant frequency alternating current at, for example, 50 Hz (Europe) or 60 Hz (USA).

Abstract: The invention relates to a continuously variable transmission (1) comprising a driven rotary part (2), a chassis (4) or housing, and a driving rotary part (3). The invention also relates to an associated operating method whereby the driven rotary part (2) or the chassis (4) or housing is coupled to a first guide or drive module (5,5?). A second guide module (14) is also provided, the two guide or drive modules (5,5?, 14) being connected to a chassis (4) or housing of the transmission (1) or an adjacent machine or installation part, such that the second guide module (14) can be displaced in relation to the first guide or drive module (5, 5?). Furthermore, the two guide or drive modules (5,5?, 14) are coupled to each other by means of at least two mechanisms, each consisting respectively of a first coupling module (7a-7d) and a second coupling module (8a-8d) which are mounted (9a-9d) or guided against each other and/or can mesh with each other.

Abstract: A continuously variable transmission includes a one-way clutch, a plurality of linking members, and a variable gear ratio mechanism. The one-way clutch includes an input shaft, a plurality of eccentric discs, a first crank member, a second crank member, an output member, an input member, and an engaging member. The input shaft is rotatable about an input center axial line under the rotational force. The plurality of eccentric discs is disposed around the input center axial line at equal intervals in a circumferential direction.

Abstract: Under control of rotation of a crankshaft 41, a friction roller 32 is pressed against a friction roller 31 in a radial direction, so as to achieve torque transmission between the rollers 31, 32. An inter-roller radial pressing reaction is canceled as an internal force in bearing supports 23, 25, with no input to a housing 11. Each bearing support 23, 25 is formed with a constricted portion at a center section of the bearing support between bearing-fitting portions at end sections of the bearing support, for lowering support stiffness of the bearing support against the inter-roller radial pressing reaction.

Abstract: A work machine includes an internal combustion (IC) engine having an output, and an infinitely variable transmission (IVT) coupled with the IC engine output. The IVT includes a hydraulic module and a mechanical drivetrain module. A pressure transducer is associated with and provides an output signal representing a hydraulic pressure within the hydraulic module. At least one electrical processing circuit is configured for controlling the IC engine output, dependent upon the output signal from the pressure transducer.

Abstract: To facilitate an integrating operation and to make fabricating cost inexpensive. An idle gear for transmitting rotation of an input gear of a drive motor to a cylindrical gear is rotatably supported by an input side end portion of a specific one crank pin, and therefore, the idle gear may simply be supported by the crank pin, further, a length in an axial direction of the cylindrical gear brought in mesh with both of the idle gear the input gear is sufficiently to a degree of being more or less longer than a distance between remote side ends of the two gears.

Abstract: Surface abrasion in an eccentric part of a crank pin or breakdown of the crank pin of an eccentric oscillation speed reducer is effectively prevented. A value N obtained by dividing reduction ratio M in an eccentric oscillation speed reducer by a diameter D passing a center of pin teeth is set to be smaller than 0.20. As the results, temperature of lubricant in the eccentric oscillation speed reducer can be depressed below 60° C., even though an output rotation speed at a rated torque of the eccentric oscillation speed reducer has become 28 rpm or more as required from a tact time or so in a factory, whereby a region between the eccentric part of the crank pin and a needle-shaped roller bearing is always lubricated with the lubricant which exerts required lubricating function.

Abstract: A device for actuating a reciprocating recovery apparatus for recovery of underground fluid. The actuating device has a centrally aligned input component, that transversely receives an output component through a central aperture, and is engaged with a driving mechanism. Torque is increased about the central output component as a series of axially aligned, but centrally offset, lobes push a corresponding driver disc around the central output at reduced velocity and increased torque. Each driver disc moves in eccentric fashion, yet remains engaged with a corresponding, centrally aligned take off member, each of which is further in combination with the central output component.

Abstract: A reduction gear includes a case including a hollow cylinder having teeth on its inner wall; a ring gear having outer teeth meshed with the teeth of the cylinder, and inner teeth; and an eccentric gear assembly mounted in the cylinder and including a hollow eccentric shaft including rear and front eccentric sections, and first and second gears rotatably secured onto the rear and front eccentric sections respectively. Rotating an input shaft in a first speed will rotate the eccentric shaft to rotate the first and second gears around the inner teeth of the ring gear eccentrically, thereby rotating the output shaft in a second speed lower than the first speed. The invention has an increased number of meshed teeth between each of the first and second gears and the ring gear so as to distribute a radial load to more teeth in rotation.

Abstract: The improved chainless drive of the present invention features a four speed planetary transmission housed within the hub of the driving wheel of a utility tricycle, and a vehicle frame which provides two options for delivering power to the transmission. In the first option the drive shaft, which extends out through bearings on the center line of the driving wheel, has a crank arm fixed on each end. A spindle is fixed in the end of each crank arm and a pedal beam is rotatably mounted near its center on each spindle. A cam roller mounted on each pedal beam near its aft end engages a short length of steel track fastened on the sides of a trunk bolted on the aft end of the tricycle frame. The cam roller provides a downward force to counter balance the weight of the rider on the cantilevered forward end of the pedal beam increasing the force on the spindle and thus amplifying the torque delivered to the drive shaft.

Abstract: In an angular position adjusting apparatus, tooth profiles of an internal gear 31 and an external gear 21 are formed according to loop shapes 74a and 84a of predetermined trochoid curves 74 and 84.

Abstract: The eccentrically oscillating gear device is equipped with an internal gear (15) having internal gear pins (15a), a carrier (11) rotating relative to the internal gear, a pair of bearings (19, 20) that have a rolling element and a ring body for supporting the rolling element, a crank shaft supported by the carrier so as to be freely rotatable and external gears (13, 14) that are equipped with external teeth having a trochoid tooth profile whose tooth top portions are cut out, and disposed between the pair of bearings. The outer peripheries of the external gears are engaged with the internal gear pins and fitted to the crank portion of the crank shaft. The eccentrically oscillating gear device is designed so that the external gear makes an eccentrically oscillating motion by rotation of the crank shaft and the rotational output is taken out from the internal gear or the carrier.

Abstract: A gear step (1) for an actuator in a motor vehicle, in particular for a vehicle seat, comprises a housing (3) provided with a drive (1) mounted thereon in such a way that it is rotatable around an axis (A), and a driven output (21) rotatable about a second axis (B) differing from the axes (A). The drive (11) is used for receiving the driven output (21) by way of at least one rolling body (31), so that the axes (A, B) are parallelly offset by an eccentricity (E) and the driven output is driven by rotating the thus obtained rolling eccentricity, wherein the driven output (21) carries out a tumbling rolling movement on the housing (3) by way of a friction oscillating gear (33, 35).

Abstract: A speed reducer has a crankshaft to be rotated in conjunction with a drive unit. First through third eccentric portions are provided on the crankshaft. First through third externally-toothed gears are adapted to be moved respectively in conjunction with the first through third eccentric portions. Pin teeth are disposed along an inner periphery of a case to allow each of the first, second and third externally-toothed gears to be in meshing engagement therewith. An output shaft unit is adapted to be rotated in conjunction with the first, second and third externally-toothed gears. The first, second and third eccentric portions are arranged with a given phase difference in a rotation direction of the crankshaft with respect to each other. Each of the first, second and third externally-toothed gears is in meshing engagement with less than half of the plurality of pin teeth.

Abstract: An internal teeth oscillating inner gearing planetary gear system is provided with an input shaft, an eccentric gear rotated by the input shaft, the internal oscillating body oscillatingly rotated through the inner circumferential surface of the eccentric gear, and an external gear meshed with the internal oscillating body.

Abstract: A reduction gear device utilized in a joint portion of an industrial robot, durability of the reduction gear device being increased in the case where torque applied to the reduction gear device is high and the reduction gear device is utilized at a high operation rate. In a reduction gear device is provided with a first reduction mechanism and a second reduction mechanism, and the second reduction mechanism includes an external gear that revolves eccentrically, an internal gear that causes orbital revolution of the eccentric movement of the external gear, and an output shaft on either the external gear or the internal gear.

Abstract: Elastic deformation of bridge portions in an externally toothed gear and external teeth is suppressed, and this extends the life of tooth surfaces of external teeth 19, improves vibration characteristics, and markedly increases output torque while preventing a planetary gear device 11 from becoming large in size.

Abstract: A reducer having an inner gearing planetary gear speed reduction mechanism is provided, which costs low and can be easily installed. A driving device is provided with a planetary gear speed reduction mechanism having an internal gear and an external gear which internally meshes with the internal gear. The planetary gear speed reduction mechanism makes one of the internal gear and the external gear (the external gear in the drawing) rotate on its axis with an oscillating movement in accordance with a rotation of an input shaft.

Abstract: The mechanical counter-rotation drive according to the present invention is based on the laws of relative motion of an eccentric part of one of at least two shafts, which are constitutive parts of this drive, with respect to the plates of a determined shape whose motion is confined by pins arranged in a determined arrangement, is illustrated in FIG. 1, where in the housing 10 which supports the mechanical counter-rotation drive are accommodated the first (driving) plate 30 and the second (driven) plate 40 in such a manner that they are approximately or completely parallel to one another. In the housing 10 are embedded a plurality of pins 20 of which each one represents a shaft which bears and around which rotates at least one cylinder 35 which is in operational contact with the perimeter 135 of the first plate 30 which is in rigid contact with the first shaft 50 (which shaft is not visible in FIG. 1).

Abstract: An eccentric gearbox with selectable large speed ratio, in this gearbox many eccentric gear (8, 12, 16) pairs are assembled in parallel, and are connected to a common input shaft (1) and a common output shaft (2). In every gear pair (8, 12, 16), one gear keeps its orientation fixed with respect to a fixed part called as fixed gear (8, 12, 16) and another gear that rotates about its own axis is called as moving gear (7, 11, 15). Difference in number of teeth on the two gears of a gear pair is kept to one tooth or more. Through proper selection of a particular gear pair any speed ratio can be selected. In this way, it is possible to make a compact gearbox, with multiple large speed ratios. Such a gear box can be used in automobiles, robot manipulators, earth moving equipments, space applications, toys, hand held tools and many other applications.