One object is to provide a speed reducer provided with a buffer mechanism for reducing an external force and capable of reliably measuring a load torque during an operation. A speed reducing device includes a speed reducing mechanism for reducing a rotation speed of an output with respect to an input between an input rotary shaft and an output rotary shaft, a housing that houses the speed reducing mechanism, and a buffer unit formed of an elastic member and having a cushion force acting mainly in a substantially rotational tangential direction. An amount of displacement of the housing generated by the buffer unit is measured by a measurement device.

The present disclosure relates to a molded article provided with a resin part formed with a thermoplastic resin composition. The molded article is provided with a resin part formed with a thermoplastic resin composition. The thermoplastic resin composition containing a thermoplastic resin, cellulose, and an ionic compound, wherein a content of the cellulose is 1 to 100 parts by mass based on 100 parts by mass of the thermoplastic resin, and a content of the ionic compound is 0.001 times or more and less than 1.000 times the content of the cellulose.

A gearwheel for a gear system for a planetary gear system of a chassis assistance system. The gearwheel is divided into at least a first spur gear and a second spur gear which are spaced apart from one another along a common rotational axis. The gearwheel has, in addition, an open spring ring with a first end, which is supported in a circumferential direction against the first spur gear, and a second end, which is supported in the direction opposite to the circumferential direction against the second spur gear in such manner that by rotating the spur gears, relative to one another about the common rotational axis, the spring ring can be stressed in order to exert a restoring torque on the spur gears. A recess is formed on at least one of the spur gears for holding part of the spring ring.

A gearwheel for a gear system for a planetary gear system of a chassis assistance system. The gearwheel is divided into at least a first spur gear and a second spur gear which are spaced apart from one another along a common rotational axis. The gearwheel has, in addition, an open spring ring with a first end, which is supported in a circumferential direction against the first spur gear, and a second end, which is supported in the direction opposite to the circumferential direction against the second spur gear in such manner that by rotating the spur gears, relative to one another about the common rotational axis, the spring ring can be stressed in order to exert a restoring torque on the spur gears. A recess is formed on at least one of the spur gears for holding part of the spring ring.

Methods and systems are provided for an engine housing assembly. In one example, an engine housing assembly comprises an engine housing component, the housing component at least partially defining a first bore for receiving a first shaft and at least partially defining a second bore for receiving a second shaft; and a reinforcement member cast into the housing, the reinforcement member having a lower coefficient of thermal expansion than the housing component, wherein the reinforcement member at least partially surrounds the first and second bores. A method of manufacturing the engine housing assembly is also provided.

A positioning drive has a first stepper drive unit having a first stepper drive controller and a first stepper motor, and a second stepper drive unit having a second stepper drive controller and a second stepper drive. The two stepper drives and the power take-off element are force-coupled and drive-coupled by a mechanical coupling unit. A central unit controls the two stepper drive controllers by a control signal, in each instance. The control signals predetermine the stator reference field angle and the rotor reference field angle set by the stepper drive controller. The central unit has an overriding regulator for the position of the power take-off element, and a subordinate regulator for setting a tensioning moment for each stepper motor. The tensioning moments occur by setting a load actual angle at the stepper drive.

A positioning drive has a first stepper drive unit having a first stepper drive controller and a first stepper motor, and a second stepper drive unit having a second stepper drive controller and a second stepper drive. The two stepper drives and the power take-off element are force-coupled and drive-coupled by a mechanical coupling unit. A central unit controls the two stepper drive controllers by a control signal, in each instance. The control signals predetermine the stator reference field angle and the rotor reference field angle set by the stepper drive controller. The central unit has an overriding regulator for the position of the power take-off element, and a subordinate regulator for setting a tensioning moment for each stepper motor. The tensioning moments occur by setting a load actual angle at the stepper drive.

An anti-backlash structure for a scissors gear is provided including a scissors gear and a cam gear which are coaxially connected to rotate relative to each other, an end piece which has one side which is press-fitted into a cam shaft so that the end piece rotates together with the cam shaft, the other side which is in surface-to-surface contact with the scissors gear, and a circumferential surface with which the cam gear is press-fitted; a bolt which is coupled to an inner diameter portion of the scissors gear, penetrates the end piece, and is inserted into the cam shaft; and a scissors spring which has one side coupled to the end piece, and the other side coupled to the bolt. When the end piece rotates, the scissors spring rotates the scissors gear relative to the cam gear through the bolt and allows the scissors gear to come into close contact with the cam gear.

An anti-backlash structure for a scissors gear is provided including a scissors gear and a cam gear which are coaxially connected to rotate relative to each other, an end piece which has one side which is press-fitted into a cam shaft so that the end piece rotates together with the cam shaft, the other side which is in surface-to-surface contact with the scissors gear, and a circumferential surface with which the cam gear is press-fitted; a bolt which is coupled to an inner diameter portion of the scissors gear, penetrates the end piece, and is inserted into the cam shaft; and a scissors spring which has one side coupled to the end piece, and the other side coupled to the bolt. When the end piece rotates, the scissors spring rotates the scissors gear relative to the cam gear through the bolt and allows the scissors gear to come into close contact with the cam gear.

Provided is a gear transmission device that can suppress backlash favorably even in the case of extended use. The gear transmission device includes a first gear having a plurality of first tooth portions with a tooth thickness that increases progressively toward the outer end side, a second gear having a plurality of second tooth portions with a tooth thickness that decreases progressively toward the outer end side, and an urging portion configured to apply an urging force to the first gear in the direction along the rational axis in such a manner that the tooth surface of the first tapered tooth area is placed in abutment against the tooth surface of the second tapered tooth area.