Abstract: A control system for a drive unit configured to control driving force and braking force integrally is provided. The control system comprises: a sensor that detects vehicle conditions and an operation amount of an accelerator pedal etc.; a brake device that is contacted to an input element of a differential unit or a rotary member attached to the drive motor connected to the differential unit; and a controller. The controller is configured to calculate: a target travelling condition based on the vehicle condition and the operation amount detected by the sensor; target drive torques or target braking torques to be applied to the right wheel and left wheel based on the target travelling condition; output torques of a drive motor and a differential motor based on the target driving torques; and a braking force to be established by the brake device and an output torque of the differential motor based on the target braking torques.

Abstract: A motor having an electromagnetic brake is provided to ensure a braking torque even when power is off. The motor assembly comprises a drive motor and an electromagnetic brake. A thrust generating mechanism translates rotational motion of a brake motor to linear motion to generate thrust force for moving any one of brake stator and brake rotor of the electromagnetic brake thereby maintaining frictional contact therebetween to stop rotation of a motor shaft.

Abstract: A power transmission unit that can multiply torque of a prime mover to be delivered to a differential gear unit is provided. Torque of a drive motor is delivered to planetary gear units through a driven gear. A first ring gear of the first planetary gear unit is meshed with a first supplemental gear, and a second ring gear of the second planetary gear unit is meshed with a second supplemental gear. The first supplemental gear and the second supplemental gear are connected to each other through a reaction gear unit to reverse the torque applied to the first ring gear to be transmitted to the second ring gear.

Abstract: The present invention provides a drive gear device that can easily be made compact and lightweight with a simple configuration, and that has little friction loss. Among externally toothed sun gear members (12a, 12b) and ring gear members (16, 17) of first and second planetary gear mechanisms (11a, 11b), one pair, which are first paired members (12a, 12b), are coupled to a coupling member (12) for equalizing the rotational speeds and rotational directions of the first paired members (12a, 12b), and the other pair, which are second paired members (16, 17) are coupled to opposite rotation members (18, 19) for making the second paired members (16, 17) rotate in opposite directions. Rotational torque inputted to the coupling member (12) is distributed to the first planetary gear mechanism (11a) and the second planetary gear mechanism (11b), and is outputted from planetary carriers (15a, 15b).

Abstract: A foreign matter attracting structure includes: an attracting body for attracting foreign matter in lubricating oil, wherein the attracting body includes a magnet and a capturing body which is composed of a weakly magnetic material, and the capturing body is disposed at a position which is magnetized by a magnetic force of the magnet.

Abstract: A pitch measurement method of performing noncontact measurement of a pitch of target portions, the target portions being provided in an object and adjacent to each other, includes moving the object such that the target portions move along a same path, continuously acquiring and storing optical data of the target portions passing a predetermined position on the path from a fixed position, while focusing on the predetermined position, calculating a focusing evaluation value representing a degree of focus at an area corresponding to the predetermined position, using a movement distance of the target portions as a variable, according to a relationship between the optical data and the movement distance, and obtaining a point group of combinations of the movement distance and the focusing evaluation value, and applying a reference curve to the point group, thereby determining the pitch based on a position where the reference curve is applied.

Abstract: In a chain transmission in which a roller chain transmits power from a driving sprocket to one or more driven sprockets, the sprocket teeth are shaped so that at a location radially outward from the sprocket pitch circle, the distance between the front surface of each sprocket tooth to a radial reference line from the sprocket center through the center of the tooth root, is at least as great as the distance from the centerline to the front tooth surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, the sprocket root diameter is smaller than the root diameter according to ISO standards, and the radius of the arcuate tooth gap bottom is greater than the radius of the chain roller.

Abstract: In a slat conveyor, slats for supporting conveyed articles and personnel extend between two side-by-side, spaced, endless roller chains engaged with driving sprockets at one end of the conveying path and driven sprockets at the other end. At a location radially outward from the pitch circle, the distance between the front surface of the sprocket teeth to the tooth center line is at least as great as the distance from the centerline to the front surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, and the root diameter is smaller than the root diameter according to ISO standards.

Abstract: A method for measuring the pitch in a noncontact way in a short time with high precision by using a simple device.

Abstract: An outboard motor engine drives an output shaft which drives a propeller shaft. The output shaft has a drive gear that engages driven gears of the propeller shaft within an oil bath for holding a lubricant for soaking the drive and driven gears. The outboard motor has an oil pump, a suction passage, and a return passage. The oil bath communicates with a suction portion of the oil pump through the suction passage, while a discharge portion of the oil pump communicates with the oil bath through a return passage. An opening of the suction passage is exposed to the oil bath and is also positioned below the drive gear.

Abstract: In a sprocket for a roller chain, the tooth form is such that the distance between the tooth center line and a part of the front tooth surface, at a location on the tooth head side of the pitch line, is greater than the distance between the tooth center line and the front surface of the tooth along the pitch line. The diameter of the tooth gap bottom circle is smaller than the diameter of a tooth gap bottom circle in a sprocket having an ISO tooth form for the same chain.

Abstract: An outboard motor engine drives an output shaft which drives a propeller shaft. The output shaft has a drive gear that engages driven gears of the propeller shaft within an oil bath for holding a lubricant for soaking the drive and driven gears. The outboard motor has an oil pump, a suction passage, and a return passage. The oil bath communicates with a suction portion of the oil pump through the suction passage, while a discharge portion of the oil pump communicates with the oil bath through a return passage. An opening of the suction passage is exposed to the oil bath and is also positioned below the drive gear.

Abstract: In a chain transmission in which a roller chain transmits power from a driving sprocket to one or more driven sprockets, the sprocket teeth are shaped so that at a location radially outward from the sprocket pitch circle, the distance between the front surface of each sprocket tooth to a radial reference line from the sprocket center through the center of the tooth root, is at least as great as the distance from the centerline to the front tooth surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, the sprocket root diameter is smaller than the root diameter according to ISO standards, and the radius of the arcuate tooth gap bottom is greater than the radius of the chain roller.

Abstract: In a slat conveyor, slats for supporting conveyed articles and personnel extend between two side-by-side, spaced, endless roller chains engaged with driving sprockets at one end of the conveying path and driven sprockets at the other end. At a location radially outward from the pitch circle, the distance between the front surface of the sprocket teeth to the tooth center line is at least as great as the distance from the centerline to the front surface at the pitch circle. The tooth faces merge smoothly with the tooth gap bottom, and the root diameter is smaller than the root diameter according to ISO standards.

Abstract: In a sprocket for a roller chain, the tooth form is such that the distance between the tooth center line and a part of the front tooth surface, at a location on the tooth head side of the pitch line, is greater than the distance between the tooth center line and the front surface of the tooth along the pitch line. The diameter of the tooth gap bottom circle is smaller than the diameter of a tooth gap bottom circle in a sprocket having an ISO tooth form for the same chain.

Abstract: A gear device improved in lowering the product of the load F acting on a pair of intermeshing teeth and the relative sliding velocity v at the area of contact of the gears, thereby minimizing the frictional heat. The gear device includes a first gear and a second gear each having a tooth profile formed by an involute curve. At least one of the first and second gears is provided with the tooth profile corrected by a combination of a correction curve W and the involute curve. On plane coordinates consisting of an x axis, an origin and a y axis which intersects with the x axis at the origin, the correction curve W is expressed by equations passing through points P.sub.1 (x.sub.1, y.sub.1) and P.sub.2 (x.sub.2, y.sub.2) and satisfying the conditions of: y=0, dy/dx=0 at the origin when x.sub.1 <x.sub.2 and y.sub.1 <y.sub.2. The x axis is the line of action indicative of a locus along which an intermeshing point moves while the first gear transmits a force to the second gear.