Abstract: Provided is a reaction force applying device for a steering wheel that can be configured in a small size. The two-stage gears 3a, 3b have an intermediate shaft 9 arranged so as to be parallel to the steering shaft 1, a first teeth section 10 provided on the intermediate shaft 9 and engaging with the shaft side teeth section 4 of the steering shaft 1, and a second teeth section 11 arranged on a portion on the electric motor 2 side of the intermediate shaft 9 with respect to the first teeth section 10 and engaging with the motor side teeth section 8 of the electric motor 2.

Abstract: Provided is a structure that together with being compact, allows a vehicle to be steered even when power is not supplied to a steering device and a turning device. A reduction mechanism 28 for reducing and transmitting the motive power of the reaction force applying motor 6 to a steering shaft 5 is configured by a shaft-side teeth portion 9 of the steering shaft 5, two-stage gears 7a, 7b having a first teeth portion 26 and a second teeth portion 27, and a motor-side teeth portion 19 of the reaction force applying motor 6. A torque transmission mechanism 4 connects the steering shaft 5 and an input shaft 51 of a steering gear unit 49, and is capable of switching between a transmitting mode of mechanically transmitting torque between the steering shaft 5 and the input shaft 51 and a non-transmitting mode.

Abstract: A vehicle weight measurement device includes a diaphragm which covers an opening area of a groove portion of a mounting part to form an oil chamber of a predetermined space together with the groove portion; a pressure sensor which detects a change in pressure of measurement fluid in the oil chamber; a first piston which presses the diaphragm; a second piston which presses the first piston; and a bearing unit interposed between the second piston and a spring bush which receives one end of a spring of a suspension device and is relatively rotatable. The bearing unit includes a thrust needle bearing which swingably supports a load in a longitudinal direction of the suspension device, and a slide bush which does not receive a load in the longitudinal direction and receives a load in a radial direction while causing constant damping to swinging.

Abstract: A vehicle weight measurement device includes a diaphragm which covers an opening area of a groove portion of a mounting part to form an oil chamber of a predetermined space together with the groove portion; a pressure sensor which detects a change in pressure of measurement fluid in the oil chamber; a first piston which presses the diaphragm; a second piston which presses the first piston; and a bearing unit interposed between the second piston and a spring bush which receives one end of a spring of a suspension device and is relatively rotatable. The bearing unit includes a thrust needle bearing which swingably supports a load in a longitudinal direction of the suspension device, and a slide bush which does not receive a load in the longitudinal direction and receives a load in a radial direction while causing constant damping to swinging.

Abstract: A vehicle weight measurement device includes a moving body, an attachment body, a stopper ring provided between the moving body and the attachment body, and a rotation prevention part configured to prevent the moving body and the attachment body from rotating relative to each other. The stopper ring includes a fixing part fixed to one of the moving body and the attachment body and a separation and detachment prevention part provided at the other of the moving body and the attachment body and configured to prevent the moving body and the attachment body from separating and detaching, without inhibiting movement of the moving body. The rotation prevention part includes a pin fitted from the moving body to the attachment body.

Abstract: The vehicle weight measurement device includes a bottom plate in contact with an arm of a suspension device, a piston which presses a diaphragm configuring an oil chamber on an upper surface side of the bottom plate, and a pressure sensor which detects pressure of a measurement fluid in the oil chamber on an lower surface side of the bottom plate. The bottom plate includes a rotation-preventing mechanism with respect to the arm of the suspension device around the pressure sensor. A hanging circumferential edge portion is formed in a flange portion of the piston. A gap is interposed between the flange portion and the bottom plate. A protruding portion of the piston engaged in a cutout of a stopper ring and a protruding portion protruding to an upper surface side and engaged to the cutout so as to be movable in a longitudinal direction are provided.

Abstract: A rotation transmission device having a high torque measurement resolution is provided.

Abstract: A weight measuring device includes: a bottom plate (200) in contact with an arm of a suspension; a piston (300) capable of pressing a diaphragm (230) forming an oil chamber (201) on an upper surface side of the bottom plate; a pressure sensor (400) for detecting a pressure of measurement fluid (R) in the oil chamber on a lower surface side of the bottom plate; an oil discharge hole portion (240) which communicates an inner side of the oil chamber with the atmosphere side and is capable of discharging excess hydraulic oil in the oil chamber; and a sealing portion (242) which is provided in the oil discharge hole portion and seals the oil discharge hole portion after discharging the excess measurement fluid (R) and equilibrating an internal pressure to the atmospheric pressure in a state of no load.

Abstract: A vehicle wheel supporting rolling bearing unit includes a stationary side bearing ring member, a rotation side bearing ring member, and plural rolling elements. The rotation side bearing ring member is provided with a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor which are fixed on a virtual plane orthogonal to a center axis of the rotation side bearing ring member. The first acceleration sensor and the second acceleration sensor are arranged on a virtual line passing through a rotation center of the rotation side bearing ring member with a same distance from the rotation center while detection directions thereof are directed in a radial direction and are opposite to each other in the radial direction. The third acceleration sensor is arranged such that a detection direction thereof is non-parallel to the detection directions of the first acceleration sensor and the second acceleration sensor.

Abstract: A vehicle weight measurement device includes an annular diaphragm (11) configured to cover an opening area (9d) of a groove portion (9c) of a mounting part (7) and to form a predetermined oil chamber (9) together with the groove portion. The diaphragm (11) is hermetically fixed by an inner collar (33) and an outer collar (35). The diaphragm (11) is pressed by a piston (43) configured to be moveable by a resilient force of a spring of a suspension device, and a pressure of a fluid to be measured R filled in the oil chamber, which is to be applied by the movement of the piston, can change. A pressure sensor (21) configured to communicate with the oil chamber and to detect a change in pressure of the fluid to be measured R filled in the oil chamber is provided.

Abstract: A vehicle wheel supporting rolling bearing unit includes a stationary side bearing ring member, a rotation side bearing ring member, and plural rolling elements. The rotation side bearing ring member is provided with a first acceleration sensor, a second acceleration sensor, and a third acceleration sensor which are fixed on a virtual plane orthogonal to a center axis of the rotation side bearing ring member. The first acceleration sensor and the second acceleration sensor are arranged on a virtual line passing through a rotation center of the rotation side bearing ring member with a same distance from the rotation center while detection directions thereof are directed in a radial direction and are opposite to each other in the radial direction. The third acceleration sensor is arranged such that a detection direction thereof is non-parallel to the detection directions of the first acceleration sensor and the second acceleration sensor.

Abstract: A vehicle wheel supporting rolling bearing unit includes a bearing part having a stationary side bearing ring member which is supported and fixed to a suspension device and non-rotatable in a use state and a rotation side bearing ring member which is coupled and fixed to a vehicle wheel and rotate together with the vehicle wheel, an electric generator which generates electric power to be supplied to a sensor provided on the vehicle wheel, a battery which stores the electric power generated by the electric generator, and a wireless communication device which wirelessly communicates an output signal of the sensor with an electronic equipment arranged on a vehicle body side. The stator is supported and fixed to the stationary side bearing ring member, and the rotor, the battery and the wireless communication device are supported and fixed to the rotation side bearing ring member.

Abstract: A friction roller type speed increaser (100) includes a high speed side shaft (11), a ring roller (21), a low speed side shaft (13), at least one fixed roller (15), at least one movable roller, and a housing (23) that surrounds the rollers. A bearing unit (45) that includes a cylindrical bearing housing (51) into which the high speed side shaft (11) is inserted, bearings (53 and 55) on an inner circumferential portion of the bearing housing (51) which rotatably support the high speed side shaft (11), an oil seal (59) which is provided at one end portion of the bearing housing (51) and closes an inner space including the bearings is floating-supported such that the bearing unit can move in a radial direction of the high speed side shaft (11) in a unit accommodating section (47) formed in the housing (23).

Abstract: A rotation transmission device having a high torque measurement resolution is provided.

Abstract: A bearing raceway ring (25) disposed near a mounting section (9) is disposed on the outer periphery of a circular cylinder section (19). A fluid-sealed chamber (40) in which a measurement liquid is hermetically enclosed is provided between a first member (8) and the bearing raceway ring (25) which is disposed near the mounting section (9). Pressure acting on the fluid to be measured changes as the bearing raceway ring (25) moves in the cylinder-axis direction, the bearing raceway ring (25) being disposed near the mounting section (9). The fluid-sealed chamber (40) is provided with a pressure sensor (44) capable of detecting a change in the pressure of the fluid to be measured.

Abstract: In order to implement a structure capable of improving the resolution of torque measurement while preventing the plastic deformation of a torsion bar (15), an input-side stopper (61) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an input-side rotating body (55) that includes an input shaft (13) and an input gear (7), and an output-side stopper (63) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an output-side rotating body (56) that includes an output shaft (14) and an output gear (8). The input-side stopper (61) and the output-side stopper (63) are combined so as to be engaged to be able to transmit torque only when the torsional angle within the elastic range of the torsion bar (15) reaches a predetermined amount.

Abstract: In order to implement a structure capable of improving the resolution of torque measurement while preventing the plastic deformation of a torsion bar (15), an input-side stopper (61) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an input-side rotating body (55) that includes an input shaft (13) and an input gear (7), and an output-side stopper (63) having an uneven shape (gear shape) in the circumferential direction is provided in a portion of an output-side rotating body (56) that includes an output shaft (14) and an output gear (8). The input-side stopper (61) and the output-side stopper (63) are combined so as to be engaged to be able to transmit torque only when the torsional angle within the elastic range of the torsion bar (15) reaches a predetermined amount.

Abstract: A rotation transmission device having a high torque measurement resolution is provided.

Abstract: A drive apparatus for an electric automobile in which a planetary gear transmission 12 is assembled for which it is possible to lengthen the traveling distance per one electric charge, and thus improve the convenience of the electric automobile. A planetary gear transmission 12 comprises a first single-pinion planetary gear mechanism 16 and a second double-pinion planetary gear mechanism 17, and after changing the power from first and second electric motors 10, 11 by a desired gear ratio, transmits the power to a driven-side rotating shaft 15. A one-way clutch 18 is provided between a first carrier 19 and a portion 27 that is fastened to the vehicle so as to allow the first carrier 19 to rotate in a specified direction and prevent the first carrier 19 from rotating in a direction opposite the specified direction.

Abstract: A drive apparatus for an electric automobile in which a planetary gear transmission 12 is assembled for which it is possible to lengthen the traveling distance per one electric charge, and thus improve the convenience of the electric automobile. A planetary gear transmission 12 comprises a first single-pinion planetary gear mechanism 16 and a second double-pinion planetary gear mechanism 17, and after changing the power from first and second electric motors 10, 11 by a desired gear ratio, transmits the power to a driven-side rotating shaft 15. A one-way clutch 18 is provided between a first carrier 19 and a portion 27 that is fastened to the vehicle so as to allow the first carrier 19 to rotate in a specified direction and prevent the first carrier 19 from rotating in a direction opposite the specified direction.