Abstract: 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.

Abstract: 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.

Abstract: There is provided a clutch mechanism that allows easy downsizing and produces favorable productivity. Output rotator has on the outer circumferential surface thereof cam surfaces and configured to gradually reduce the space from a housing chamber inner circumferential surface toward one side and recesses adjacent to the one side of the cam surfaces. Input rotator has pressure transmission portions that are fitted with circumferential play to the recesses and are protruded from the insides of the recesses in a centrifugal direction. Engagement pieces are disposed in contact with the cam surfaces and the housing chamber inner circumferential surface. When the input rotator rotates toward the other side relative to the one side, the pressure transmission portions abut against the engagement pieces and then abut against circumferential end surfaces in the recesses to press and move the output rotator.

Abstract: To provide an SmCo-based rare earth sintered magnet having a small diameter and a multipolar magnetized magnetic structure and having a high coercive force and a high magnetization rate. The outer shape of an SmCo-based rare earth sintered magnet having a coercive force HCJ (kOe) at a room temperature (° C.) of 7.5 (kOe)<HCJ?27 (kOe) is formed into any one of a cylindrical shape, a ring-like shape, a columnar shape, and a disk-like shape. Multi-pole magnetization is performed on the SmCo-based rare earth sintered magnet so as to satisfy (diameter D/the number of poles p) (mm)<(4/?) (mm) (p is an even number equal to or greater than 4), and the magnetization rate is set to 80(%) or more.

Abstract: Provided is a rotational force transmitting apparatus that can prevent jolting of an output shaft in a circumferential direction caused by jolting in an input-side mechanism in the circumferential direction, has a thin and small structure, and is excellent in productivity. In the rotational force transmitting apparatus, a clutch mechanism 1 and a planetary gear mechanism 2 are axially coupled in a fixing member 10, and a rotational force inputted to a sun gear 62 of the planetary gear mechanism 2 is outputted from an output rotation member 20 of the clutch mechanism 1. On the fixing member 10, a substantially columnar inner-circumferential surface is provided. A housing chamber 11 housing the clutch mechanism 1 is constituted by the inner circumferential surface on one side in an axial direction. An internal gear 2a of the planetary gear mechanism 2 engaging with planetary gears 61 is provided on the other side.

Abstract: There is provided a clutch mechanism that allows easy downsizing and produces favorable productivity. Output rotator has on the outer circumferential surface thereof cam surfaces and configured to gradually reduce the space from a housing chamber inner circumferential surface toward one side and recesses adjacent to the one side of the cam surfaces. Input rotator has pressure transmission portions that are fitted with circumferential play to the recesses and are protruded from the insides of the recesses in a centrifugal direction. Engagement pieces are disposed in contact with the cam surfaces and the housing chamber inner circumferential surface. When the input rotator rotates toward the other side relative to the one side, the pressure transmission portions abut against the engagement pieces and then abut against circumferential end surfaces in the recesses to press and move the output rotator.

Abstract: Provided is a rotational force transmitting apparatus that can prevent jolting of an output shaft in a circumferential direction caused by jolting in an input-side mechanism in the circumferential direction, has a thin and small structure, and is excellent in productivity. In the rotational force transmitting apparatus, a clutch mechanism 1 and a planetary gear mechanism 2 are axially coupled in a fixing member 10, and a rotational force inputted to a sun gear 62 of the planetary gear mechanism 2 is outputted from an output rotation member 20 of the clutch mechanism 1. On the fixing member 10, a substantially columnar inner-circumferential surface is provided. A housing chamber 11 housing the clutch mechanism 1 is constituted by the inner circumferential surface on one side in an axial direction. An internal gear 2a of the planetary gear mechanism 2 engaging with planetary gears 61 is provided on the other side.

Abstract: The present invention obtains a device for displaying the rearward field of view of a hydraulic shovel, the device enabling safe and efficient work by a front working machine. A device for displaying the rearward field of view of a hydraulic shovel is provided with a lower traveling structure, an upper revolving structure provided on the lower traveling structure so as to be rotatable, a front working machine provided in the front part of the upper revolving structure, a camera provided in the rear part of the upper revolving structure in order to obtain the rearward field of view of the revolving structure, and a monitor (21) for displaying an image acquired by the camera.

Abstract: Disclosed is a display device that includes a display unit provided in a cabin of a construction machine, an operating unit with a switch for operating the display unit, and a monitor controller for controlling the display unit and the operating unit, wherein: upon some kind of abnormality being detected by abnormality detection means for detecting abnormalities in mechanisms equipped in/on the construction machine, a warning logo corresponding to the kind of abnormality is displayed on the display unit, and a warning item for displaying information inclusive of details of the abnormality is added to a menu in a list format that contains items, each for executing a previously assigned specific function.

Abstract: A very thin fan motor with an attached heat sink that has high heat radiation and air cooling effects in a small, flat, thin package, that has a simple and easily assembled overall structure as a fan motor, and that has superior cooling efficiency.