Abstract: The vehicular brake system includes a hydraulic brake device and an electromechanical brake device. The electromechanical brake device includes: an electric motor; a braking force application mechanism to apply, to wheels, a braking force having a value based on an output from the electric motor; and a control device to control the electric motor. A brake operation input detector to detect an input of a brake operation is provided. The control device includes: determination section to determine whether a vehicle speed detected by vehicle speed detector is less than or equal to a predetermined vehicle speed; and operation limiter to limit or halt an output from the electric motor even when the brake operation input detector detects an input of a brake operation in a case where the determination section determines that the vehicle speed is less than or equal to the predetermined vehicle speed.

Abstract: An electric brake system with a parking function is configured to actuate an electric motor when there exists a request to apply a parking brake. With the motor being actuated, the electric brake system moves a locking pin from an unlocking position to a parking/locking position. The electric brake system is further configured to prohibit the actuation of the electric motor even if the brake pedal is operated while the vehicle is at a stop and when the parking brake operation has stopped.

Abstract: A magnetic load sensor unit (1) is provided which can detect the magnitude of an axial load applied by a linear motion actuator (14) to a friction pad (22). The magnetic load sensor unit (1) includes a magnetic target (4) which generates a magnetic field, and a magnetic sensor (5) designed to move relative to the magnetic target (4) corresponding to the axial load.

Abstract: An electric linear motion actuator includes a locking mechanism for locking and unlocking the rotor shaft of an electric motor. The locking mechanism includes circumferentially arranged locking holes provided in a gear of a reduction gear mechanism, a locking pin moved toward and away from the locking holes, and engaged in one locking hole to lock the gear when the locking pin is moved toward the gear, and a linear solenoid for moving the locking pin toward and away from the gear. The plunger of the linear solenoid and the locking pin are formed as separate parts, and disposed coaxial with each other with their end faces axially facing each other. This prevents the moment load applied from the gear to the locking pin from acting on the plunger, thereby preventing damage to a bobbin slidably supporting the radially inner surface of the plunger.

Abstract: A magnetic load sensor unit is provided which can detect a load with a minute movement of its part, and which is durable and less likely to be influenced by temperature. The sensor unit includes a flange member (1) deflectable when an axial load is applied, a support member (2) supporting the flange member (1), a magnetic target (3) which generates a magnetic field, and a magnetic sensor (4) for detecting the magnetic field generated by the magnetic target (3). The magnetic target (3) and the magnetic sensor (4) are fixed to the flange member (1) and the support member (2), respectively, such that when the flange member (1) is deflected, the magnetic target (3) and the magnetic sensor (4) move relative to each other, whereby magnitude of the load can be detected based on the magnetic field detected by the magnetic sensor (4).

Abstract: The vehicular brake system includes a hydraulic brake device and an electromechanical brake device. The electromechanical brake device includes: an electric motor; a braking force application mechanism to apply, to wheels, a braking force having a value based on an output from the electric motor; and a control device to control the electric motor. A brake operation input detector to detect an input of a brake operation is provided. The control device includes: determination section to determine whether a vehicle speed detected by vehicle speed detector is less than or equal to a predetermined vehicle speed; and operation limiter to limit or halt an output from the electric motor even when the brake operation input detector detects an input of a brake operation in a case where the determination section determines that the vehicle speed is less than or equal to the predetermined vehicle speed.

Abstract: A linear motion actuator includes an outer ring member mounted in a housing, a rotary shaft rotated by a motor, planetary rollers mounted between the outer ring member and the shaft and supported by a carrier rotatable about the shaft. A helical rib is formed on the inner surface of the outer ring member which is engaged in helical grooves formed in outer surfaces of the planetary rollers. When the shaft rotates, the planetary rollers rotate and revolve, thereby axially moving the outer ring member. Uneven axial loads applied to the planetary rollers from the outer ring member are supported by thrust bearings disposed between the planetary rollers and an inner disk of the carrier. Aligning seats are provided between each opposed pair of the planetary rollers and the thrust bearings such that the contact surfaces of the aligning seats shift relative to each other under the uneven axial loads.

Abstract: An electric brake system with a parking function is configured to actuate an electric motor when there exists a request to apply a parking brake. With the motor being actuated, the electric brake system moves a locking pin from an unlocking position to a parking/locking position. The electric brake system is further configured to prohibit the actuation of the electric motor even if the brake pedal is operated while the vehicle is at a stop and when the parking brake operation has stopped.

Abstract: An electric linear motion actuator includes a locking mechanism for locking and unlocking the rotor shaft of an electric motor. The locking mechanism includes circumferentially arranged locking holes provided in a gear of a reduction gear mechanism, a locking pin moved toward and away from the locking holes, and engaged in one locking hole to lock the gear when the locking pin is moved toward the gear, and a linear solenoid for moving the locking pin toward and away from the gear. The plunger of the linear solenoid and the locking pin are formed as separate parts, and disposed coaxial with each other with their end faces axially facing each other. This prevents the moment load applied from the gear to the locking pin from acting on the plunger, thereby preventing damage to a bobbin slidably supporting the radially inner surface of the plunger.

Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.

Abstract: A ball ramp mechanism is configured such that a driving-side rotor and a driven-side rotor are located on the same axis in opposing relationship with each other; three opposed pairs of arc-shaped ramp grooves are provided on the respective opposing faces of the two rotors at uniform intervals in the circumferential direction, with the depth thereof being changed gradually in the circumferential direction and the direction of the change being made opposite therebetween; a ball is incorporated between each set of the opposing paired ramp grooves; the balls are retained by the cage; and flexibility is imparted to pillar sections defined between pockets of the cage so as to make the pillar sections elastically deformable; dimensional variations due to manufacturing tolerances of the ramp grooves are absorbed via elastic deformation of the pillar sections so that each of the plurality of balls is enabled to contact the ramp grooves uniformly.

Abstract: A magnetic load sensor unit is provided which can detect a load with a minute movement of its part, and which is durable and less likely to be influenced by temperature. The sensor unit includes a flange member (1) deflectable when an axial load is applied, a support member (2) supporting the flange member (1), a magnetic target (3) which generates a magnetic field, and a magnetic sensor (4) for detecting the magnetic field generated by the magnetic target (3). The magnetic target (3) and the magnetic sensor (4) are fixed to the flange member (1) and the support member (2), respectively, such that when the flange member (1) is deflected, the magnetic target (3) and the magnetic sensor (4) move relative to each other, whereby magnitude of the load can be detected based on the magnetic field detected by the magnetic sensor (4).

Abstract: A magnetic load sensor unit (1) is provided which can detect the magnitude of an axial load applied by a linear motion actuator (14) to a friction pad (22). The magnetic load sensor unit (1) includes a magnetic target (4) which generates a magnetic field, and a magnetic sensor (5) designed to move relative to the magnetic target (4) corresponding to the axial load.

Abstract: A linear motion actuator includes an outer ring member mounted in a housing, a rotary shaft rotated by a motor, planetary rollers mounted between the outer ring member and the shaft and supported by a carrier rotatable about the shaft. A helical rib is formed on the inner surface of the outer ring member which is engaged in helical grooves formed in outer surfaces of the planetary rollers. When the shaft rotates, the planetary rollers rotate and revolve, thereby axially moving the outer ring member. Uneven axial loads applied to the planetary rollers from the outer ring member are supported by thrust bearings disposed between the planetary rollers and an inner disk of the carrier. Aligning seats are provided between each opposed pair of the planetary rollers and the thrust bearings such that the contact surfaces of the aligning seats shift relative to each other under the uneven axial loads.

Abstract: An electric linear motion actuator is proposed which includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.

Abstract: The object is to prevent rotation of the case when a load is applied to the adjusting screw that tends to push in the adjusting screw.

Abstract: A lash adjuster is provided of which an adjusting screw can be repeatedly fixed in position. The lash adjuster includes a nut member 14 having an internal thread 15 on an inner periphery thereof, an adjusting screw 17 having a external thread 16 on the outer periphery thereof which is in threaded engagement with the internal thread 15, and a return spring 19 biasing the adjusting screw 17 in the direction to protrude from the nut member 14, wherein the lash adjuster further includes an initial setting member 25 detachably disposed between the adjusting screw 17 and the nut member 14, and wherein the adjusting screw 17 is fixed to the nut member 14 due to frictional forces between the initial setting member 25 and the adjusting screw 17 and between the initial setting member 25 and the nut member 14.

Abstract: A lash adjuster is provided of which the adjusting screw can be repeatedly and easily brought into the initial set position. In a lash adjuster including a nut member 14 having an internal thread 20 on the inner periphery thereof, an adjusting screw 15 having an external thread 19 on the outer periphery thereof that is in threaded engagement with the internal thread 20, and a return spring 17 biasing the adjusting screw 15 in the direction to protrude from the nut member 14, a washer 18 is provided which is axially deformed and produces frictional resistance to rotation that serves to prevent rotation of the adjusting screw 15 by its elastic restoring force when the adjusting screw 15 is threaded into the nut member 14.

Abstract: A lash adjuster is provided of which the return spring is never compressed excessively when the adjusting screw is pushed into the nut member, and of which the external thread on the outer periphery of the adjusting screw can be formed easily by rolling. The lash adjuster 1 includes a nut member 12 having an internal thread 13, an adjusting screw 15 having an external thread 14 on its outer periphery which is in threaded engagement with the internal thread 13, and a return spring 17 biasing the adjusting screw 15 in the direction to protrude from the nut member 12. The adjusting screw 15 pivotally supports an arm 7 of a valve gear at its end protruding from the nut member 12. The adjusting screw 15 has at its portion protruding from the nut member 12 a stopper portion 23 having a larger diameter than the inner diameter of the nut member 12.

Abstract: A lash adjuster includes a nut member inserted in a receiving hole formed in the top surface of a cylinder head, an adjusting screw having an external thread on its outer periphery which is in threaded engagement with an internal thread on the inner periphery of the nut member, and a return spring biasing the adjusting screw. The adjusting screw has an end protruding from the nut member and pivotally supporting an arm of a valve gear. The adjusting screw is a solid member. A spring seat is disposed between the adjusting screw and the return spring and kept in point contact with the end of the adjusting screw inserted in the nut member. The spring seat is axially slidably fitted in the inner periphery of the nut member, thereby keeping the adjusting screw and the spring seat coaxial with each other.