Abstract: The present invention relates to a speed reduction device for preventing a rotational back-rush that includes: a rotary plate provided at the inside of a square casing; an external gear disposed in eccentrically tooth-coupling relation with the internal gear; operational grooves disposed at right and acute angles to the internal gear and the output shaft, at the outside of the rotary plate; eccentric shafts provided in the operational grooves to correspond to the eccentric quantity; an input shaft extended from any one of the eccentric shafts to the outside of the square casing; and eccentric parts provided in the eccentric shafts, the eccentric part for guiding the rotary plate when the eccentric part pushes the rotary plate.

Abstract: It is an object to obtain a power transmission device capable of allowing conflicting needs to coexist rationally and effectively in accordance with a driving situation. As power-transmitting mechanisms of a power transmission device, there are provided a plurality of characteristically-differentiated internally meshing planetary gear mechanisms, each having an external gear and an internal gear having external teeth and internal teeth the difference in the number of teeth between which is slight. In this structure, at least two of the internally meshing planetary gear mechanisms are disposed in parallel on a path of power transmission, and power transmission characteristics of the two mechanisms are designed to differ from each other.

Abstract: The invention relates to a series of gearboxes consisting of single- or multi-stage gear systems in at least one size category, each of which comprises one or more variants, such that each variant incorporates at least one double-shaft, reversible planetary stage consisting of a combination of an open positive gearbox having lantern-gear teeth with at least one planetary gear and an output system, wherein the lantern-gear arrangement can be specified by a number z1, in particular a number z1 of rollers (26), and wherein a number of teeth z2 can be assigned to at least one planetary gear (21, 22), and wherein within a given size category the index i can be assigned to the value z1 of the variants within this size category and the index j can be assigned to the value z2 of the variants within this size category to form a matrix Mij=(z1i, z2j) (in particular a matrix doubly indexed with ij), and wherein the matrix with index k comprises identifiable subsequences Sk, such that the variants within a given s

Abstract: An eccentric gear for providing a speed difference between two machine elements which are rotatably journalled in relation to a reference member and individually rotatable around a symmetry axis. The gear includes two pairs of co-operating gear rims, one of which in each pair is eccentric in relation to the axis and one of which is in the form of a male gear rim with out-turned teeth, and the other one is a female gear rim with in-turned teeth. One of the gear rims in each pair is rigidly connected to a homologous gear rim in the other pair of gear rims and situated along a common axis that is eccentric and oblique in relation to the axis while the other gear rims are rotatable in relation to each other.

Abstract: The invention relates to a device (10) for driving an output mechanism (46), comprising a rotationally driveable input shaft (14). Means are located between said input shaft (14) and the output mechanism (46) for transmitting a drive torque of the input shaft (14) to the output mechanism (46).

Abstract: A simple planetary gear mechanism is provided with an automatic alignment function to support the planet gear to obtain a speed reducer having reduced backlash by a simple method. A planet gear is supported by a carrier pin that is in turn supported by a carrier. The carrier pin includes a crank portion that is eccentric by “e” relative to the axis center of the carrier pin with the eccentric angle being made variable. The planet gear is supported rotatably about the axis center of the crank portion. Consequently, with the eccentric angle being made variable, the axis center of the planet gear is automatically aligned in the radial direction upon assembly of each gear, thereby making it possible to minimize backlash only by incorporating a sun gear having a proper dimension.

Abstract: A drive transmission has a rotary drive input member that is inclined with respect to its axis of rotation and that is driven by a motor. A first gear is mounted on the drive input member and engages with a rotatable second gear and a fixed third gear. Rotation of the drive input member causes the first gear to rock while the second gear provides a rotary drive output for the drive transmission.

Abstract: The present invention is a wobbling inner gearing planetary gear system having planetary external gears, and a center axis being located inside a periphery of the planetary external gears. The external gears can be provided in a number of 2n where n is an integer of 2 or more. The 2n external gears can be arranged in an circumferential direction of the center axis with a phase difference of 360°/2n. The external gears form parallels, and two external gears of each pair are offset from each other by a 180° phase difference. The two external gears can be arranged adjacent to each other in an axial direction of the center axis.

Abstract: The invention relates to a gear motor which is easy to install and which due to its especially flat design can be utilized in various ways also in narrow spaces. To this end, the gearmotor is provided on one side of a wheel-shaped housing base body with an especially short motor and on the opposite side and in a coaxial relation thereto with a reducing gear. The main gear drive element can be configured integrally with the motor shaft and with a circular disk as the line support for the disk-shaped rotor by plastic injection molding. The track of said line support is introduced in the disk surface as an electroconductive lining by way of MID technology.

Abstract: A low-vibration and precise electrically driven actuator is provided. A disk is fixed to an input shaft, and a planetary gear is fixed to an output shaft. A circular recess is formed in the disk so as to be eccentric with respect to the input shaft. A ring gear engaged with the planetary gear is rotatably supported by the circular recess. A weight portion W is provided in an unrecessed portion of the disk in order to recover an axial dynamic balance of the disk, which is lost by arranging the circular recess and the ring gear. Since the planetary gear is coaxially fixed to the output shaft, it does not make an eccentric motion and thus its dynamic balance is secured. Accordingly, the axial dynamic balance can be secured in every individual rotating element composing a gear device. The gear device is employed in the electrically driven actuator for the purpose of providing an electrically driven actuator with a low vibration and a property of high precision.

Abstract: A dynamic balance is improved in an S-P-C type planetary gear mechanism. An input shaft is fixed to a disk, and an output shaft is fixed to a planetary gear. A circular recess is formed in the disk so as to be eccentric to the input shaft. A ring gear engaged with the planetary gear is rotatably supported by the circular recess. A weight-reduced portion having the same depth as that of the recess is provided in a part of the disk where the circular recess is not formed, and a weight portion is formed to recover the axial dynamic balance of the disk, which is lost by arranging the circular recess and the ring gear. Since the planetary gear is fixed coaxially to the output shaft, it does not perform an eccentric motion and thus secures the dynamic balance thereof. Accordingly, the dynamic balance in the axial direction is secured for every individual rotating element constructing a gear device.

Abstract: An eccentric gear for transferring a torque in one single step and at a high gear ratio, from a driving element to a driven element. In a stationary housing there is an outer gear ring which co-operates with an inner gear ring which in turn is co-rotatively connected to the driven element that is mounted in bearings via a stationary bearing. The inner gear ring is eccentrically movable to generate along the outer gear ring, while only some teeth are in engagement with the outer gear ring. Thereby, the inner gear ring, which performs a nutating motion, is connected to a thin rod which at a free end has a male element that is in engagement with a seat formed with an analogous cross-sectional shape located deeply within the driven element. By this construction, the gear attains an extremely short length of construction, at the same time as the sound level during operation is reduced.

Abstract: The invention relates to an eccentric gear for providing a speed difference between two machine elements (3, 4) which are rotatably journalled in relation to a reference member (2) and individually rotatable around a symmetry axis (C). The gear includes two pairs of co-operating gear rims (6, 7; 8, 9), one of which in each pair is eccentric in relation to the symmetry axis (C) and one of which is in the form of a male gear rim (6, 8) formed with out-turned teeth, and the other one (7, 9) is in the form of a female gear rim formed with in-turned teeth, which has a larger diameter than the appurtenant male gear rim (6, 7) in order to enable engagement of only a few of the teeth of the male gear rim in the female gear rim, one of the gear rims being arranged to roll off against the other one. According to the invention, one of the gear rims, e.g.

Abstract: A simple planetary gear mechanism is provided with an automatic alignment function to support the planet gear to obtain a speed reducer having reduced backlash by a simple method. A planet gear is supported by a carrier pin that is in turn supported by a carrier. The carrier pin includes a crank portion that is eccentric by “e” relative to the axis center of the carrier pin with the eccentric angle being made variable. The planet gear is supported rotatably about the axis center of the crank portion. Consequently, with the eccentric angle being made variable, the axis center of the planet gear is automatically aligned in the radial direction upon assembly of each gear, thereby making it possible to minimize backlash only by incorporating a sun gear having a proper dimension.

Abstract: A power transmission has a stationary internal gear surrounding an external gear having a diameter smaller than diameter of the internal gear. The internal gear is mounted on an eccentric joint joined to the power input shaft and is retained in engagement with a segment of the teeth of the internal gear with an arm and roller riding on the internal surface of the external gear. A driven shaft is operatively connected to the external gear with the eccentric and rollers located in holes in a circular flange of the external gear.

Abstract: A gearless transmission is provided for transmitting rotational velocity from an input shaft to an output shaft without gears. The transmission includes an input shaft connected to a wedge. Both the input shaft and the wedge have rotational axes. The rotational axis of the input shaft is disposed at an angle with respect to the rotational axis of the wedge. As a result, rotation of the input shaft results in a processional motion of the axis of the wedge. The wedge engages an output plate which is connected to a universal joint which, in turn, is connected to an output shaft. The processional rotation of the wedge is transmitted to the output plate and, consequently, to the output shaft without the need for a geared or enmeshed relationship between the wedge and the output plate.

Abstract: A device for transmitting a torque between two rotational elements (5, 2), includes an inner gear ring (24) that via only a few teeth engages an outer gear ring (23) being member of a cover (17) that is connected with one of the rotational elements (2). The axis of symmetry (A) of the gear ring (24) is oblique relative to the axis of symmetry (B) of the rotational elements (5, 2). By the aid of an eccentric portion (27) the gear ring disc (21) is imparted to perform a planetary motion along the outer gear ring (23), whereby a transmission element, that supports the inner gear ring, is subjected to a nutating motion. Between a stationary member (12) and the gear ring disc (21) a bellows (13) is provided, said bellows (13), in a hermetically tight way, separating the spaces (14,15) where the rotational elements (5, 2) are located.

Abstract: An eccentric gear comprises two differently large gear rings (6, 7), of which an outer ring (6) has a certain number of inwardly directed teeth and an inner ring (7) has a smaller number of outwardly directed teeth, of which only a few engage with the outer gear ring, in that the inner gear ring is eccentrically mounted in bearings. The inner gear ring (7) is integrated with a casing part (8) whose geometrical axis of rotation (A) is oblique relative to an axis of symmetry (B) through the center of the outer gear ring (6). During the generation of the inner gear ring, the casing part is submitted to a nutating motion, during which the axis of rotation (A) of the casing part moves as a generatrice along an imaginary cone, around a cone apex (C) that is axially distanced from the gear rings (6, 7).

Abstract: A speed reducer having a fixed first member, a second member opposed to the first member, a pressing member and for inclining the second member and making it bear against the first member. The pressing member also presses the second member so that the bearing portion thereof may describe a circular locus. Also provided are an output shaft and a connecting member connecting the second member and the output shaft together.

Abstract: There is disclosed a reduction gear apparatus including a first member, a second member connected to the output shaft, a press member that rotates together with the input shaft to press part of the second member so as to bring the part into contact with the first member, and a control member for controlling rotation of the first member about the output shaft. A high speed reducing ratio can be obtained with respect to rotation of a motor, and a clutch function for connecting/disconnecting power transmission to/from the output shaft by controlling rotation of the first member and other functions can be imparted to the gear reduction apparatus.

Abstract: A nutation motion generator which transforms linear motion into nutation motion. The device employs a spherical, four-bar linkage mechanism. Three four-bar linkage mechanisms are sandwiched between a stationary support surface and a drive plate and arranged at 120.degree. intervals about the support surface. Each four-bar linkage mechanism is constructed of four planar sections which are hinged along their edges, the four hinged planar sections being essentially triangular in shape so that they would join at a point in the center of the device if they extended to the apex of their respective triangles. A universal joint is located at the center of the device to provide stability. The four-bar linkage mechanism can be collapsed to a substantially flatten configuration, opened and then collapsed to a substantially flattened configuration at an angle 90.degree. to that of the first flattened configuration.

Abstract: A speed-reducing apparatus of low mechanical noise is disclosed which includes a wobbling rotation plate. In the speed-reducing apparatus, a fixed plate and a wobbling rotation plate face each other at a rotation angle and a rotation phase difference and are gradually engaged together with an output shaft.

Abstract: An automatic washer having an imperforate wash tub, a perforate wash basket disposed within the tub and rotatable about a vertical axis and a bottom plate disposed within the lower portion of the wash basket and mounted for wobbling motion. A motor is selectively interconnected with the basket and bottom plate for rotating the basket and the bottom plate together and for wobbling the bottom plate relative to the wash basket while the basket is held stationary such that the clothes items are agitated within the wash basket. A controlled rotation device is provided for driving the bottom plate in a wobbling motion while rotating the bottom plate, at a reduced rate, within the bottom of the wash basket. In a second embodiment, the wobble plate is supported and constrained to be driven in a wobbling motion while experiencing no rotation within the basket.

Abstract: A gearless mechanical transmission includes a housing which supports a high-speed shaft and a low-speed shaft along a main rotational axis. The housing also includes a precession link therein fixed for rotation about the high-speed shaft at an angle skewed with regard to the main rotational axis. A first cam surface is associated with the housing, a second cam surface with the low-speed shaft and a third and fourth cam surface with a precession link. Cam follower elements include rollers which establish rolling contact between the first and third and second and fourth cams respectively.

Abstract: The face angle dependent force versus displacement properties of the double faced, asymmetrical inclined plane are extended to a three dimensional rotating machine which exhibits the properties of continuously variable torque versus speed ratios in both forward and reverse directions. These desired properties are obtained in the three dimensional model through the use of circular disks which are tilted on their axes of rotation to create the force versus angle properties of the inclined plane. The selection of desired torque-speed ratios including transitioning through a zero speed or "frictionless clutch" operation. Ratio selection is accomplished by setting the tilt angles of three disks around their respective axes of rotation. Two of these disks are mounted through universal joint mounts to the transmission output shaft and the third disk is mounted, through a universal joint mount, to a non-rotating sleeve surrounding the output shaft.

Abstract: A robot wrist comprising a plurality of mutaully rotatable tubular parts arranged in series with each other and a tubular member (2), such as a tool attachment, the member (2) being rotatably mounted on one (1) of the parts and, via a tubular gear, being driven by a separate motor. The motor (10, 11) has a tubular rotor (11) which, along with the tubular gear (4, 5), is concentrically arranged with the tubular member (2) to form a channel for supply and/or communication caples or light beams. The robot wrist exhibits a great orientation capacity in space while having at the same time a relatively small diameter, which enables the insertion of the part (1) into confined spaces.

Abstract: The speed changing device incorporates a planet wheel (5) located in a housing (1) with provision for oscillating and a planet carrier in the form of a sleeve (7) rigidly attached to an arm (9) at a free end whereof there is fitted a roller (11). A second arm (10) with a roller (12) is symmetrically located in a diametrical plane of the planet wheel (5) so at to make an angle less than 180.degree. with the first arm (9). The sleeve (7) is spring-loaded in the axial direction.