A transmission housing (2) including two housing elements (9) that can be positioned to press against each other and that in the assembled state define: a cavity (13); a shaft (6) projecting at least in part from the housing; a motion transmission mechanism (30) for transmitting motion to said shaft (6), the motion transmission mechanism (30) being housed at least in part inside the cavity (13) of the housing (2); and adhesive connection means (16) for connecting together housing elements (9) that are arranged in the zone where said housing elements (9) are pressed together and referred to as a join plane (10).

The adhesive connection means (16) include a main channel (163) for receiving adhesive surrounding said cavity (13), said main channel (163) comprising a female element (1631) carried by a housing element (9) and a male element (1632) carried by the other housing element (9) with the male element (1632) being engaged at least in part in the female element (1631) in the assembled-together state of said housing elements (9).

Disposable torque-limiting mechanisms with an upper shank component with a torque-limiting interface, a lower shank component with a torque-limiting interface, and a rubbery spring material biasing element. Torque-limiting interfaces having a plurality of undulations arranged around an axial bore or drive socket and separated by a plurality of transition regions, with each undulation having an upslope, a peak, and a downslope. The torque-limiting interfaces are configured to engage and disengage to provide torque transmission with predetermined torque limits at various rotational speeds and for amounts of actuations while remaining within a specified operational range.

A torque limiter includes a first meshing portion provided at a surface of an input shaft which transmits a drive force of a drive motor, the surface intersecting with an axial direction of the input shaft, and a disc spring portion including a second meshing portion arranged facing the first meshing portion in the axial direction and which is configured to mesh with the first meshing portion, the disc spring portion being integrally rotatable with an output shaft which is provided coaxially with the input shaft and which is rotatable relative to the input shaft, the disc spring portion being deflected to displace the second meshing portion in a direction opposite to the first meshing portion in a case where a load equal to or greater than a set value is applied to the disc spring portion while the second meshing portion is being biased towards the first meshing portion.

A torque limiter includes a first meshing portion provided at a surface of an input shaft, a plate including a second meshing portion which is configured to mesh with the first meshing portion, and a disc spring portion integrally rotatable with an output shaft, the disc spring portion including an engaging portion engaging with the plate, the disc spring portion deflected to displace the engaging portion in a direction opposite to the plate in a case where a load equal to or greater than a set value is applied to the disc spring portion while pressing the plate via the engaging portion so as to bias the second meshing portion towards the first meshing portion.

A mechanical backstop is provided which comprises a housing, an input impact gear, a frictional plate, a floating impact gear, and an output impact gear. The floating impact gear is movably mounted between the input impact gear and the output impact gear to achieve transmission. The frictional plate is fixed relative to the housing and disposed at a side of the floating impact gear close to the input impact gear. When the input impact gear transmits a torque to the floating impact gear, the floating impact gear floats toward the output impact gear to separate from the frictional plate and transmit the torque to the output impact gear. When the floating impact gear transmits a torque reversely, the floating impact gear floats toward the input impact gear to abut against the frictional plate and achieve reverse locking.

A transaxle may include an input shaft including a first shaft and a second shaft; and a torque limiter including an input unit and connected to the other end of the first shaft so as to be relatively non-rotatable, a driven unit connected to a second end of the second shaft so as to be relatively non-rotatable, and a region transmitting a torque between the input unit and the driven unit while limiting the torque to a predetermined value or less. By connecting the input unit and the driven unit of the torque limiter with a one-way clutch, the second shaft is rotatable relative to the first shaft when a rotation direction of the first shaft is a first direction, and the second shaft is non-rotatable relative to the first shaft when the rotation direction is a second direction opposite to the first direction.

Disposable torque-limiting devices having an upper shank component with a torque-limiting interface, a lower shank component with a torque-limiting interface, and a spring element. Torque-limiting interfaces having a plurality of undulations arranged around an axial bore or drive socket and separated by a plurality of transition regions, with each undulation having an upslope, a peak, and a downslope. The torque-limiting interfaces are configured to engage and disengage to provide torque transmission with predetermined torque limits at various rotational speeds and for amounts of actuations while remaining within a specified operational range. The encasement provides mounts for a tool and for a drive shaft which may be connected to a powered device.

A coil spring unit includes a coil spring; and a metal plate supporting the coil spring, the metal plate including a plurality of supporting portions cooperative with each other to support the coil spring, wherein the supporting portions are provided by bending the metal plate at bending lines and have supporting surfaces substantially perpendicular to the bending lines, respectively, and wherein the supporting surfaces are substantially parallel with outside tangential lines of the coil spring and support the coil spring.

This application pertains to an electromagnetic dog clutch, including a movable gear sleeve and a fixed toothed sleeve that are engaged to transmit power. The movable gear sleeve is provided with contrate transmission teeth or tooth spaces, and the fixed toothed sleeve is correspondingly provided with contrate tooth spaces or transmission teeth. The transmission teeth have a uniform thickness in a direction of tooth length, tooth spaces that engage with the transmission teeth have a sector-shape in a direction of tooth space length, and the width of two sides of the tooth spaces gradually increases outwardly along the radial direction of the fixed toothed sleeve and gradually decreases inwardly along the radial direction of the fixed toothed sleeve. By employing the engagement of transmission teeth of uniform thickness and sector-shaped tooth spaces, the transmission teeth can more easily engage with the tooth spaces, and more easily realize surface contact.

A clutch device includes an input disc, an output disc, and a biasing member configured to press the input disc against the output disc. A rotation load applied to an output shaft separates the input disc from the output disc against biasing force of the biasing member. The input disc and the output disc include opposing surfaces, each of which includes axially disengageable overlapping tooth portions. Recessed and raised portions of each tooth portion are formed continuously in a radial direction and are alternately arranged in a circumferential direction. Each of the curved shapes of the recessed and raised portions is maintained at a respective identical height while a circumferential width thereof continuously expands in a radially outward direction. Also disclosed is a motor unit including the clutch device. The disclosed clutch device reduces, e.g., deformation or damage of a disengageable portion, and therefore, can improve durability.