摘要:
The magnetic attraction force of an electromagnetic coil in an electromagnetic clutch is increased in a limited installation space, thereby improving reliability of operation. The dimensions of a field core housing the electromagnetic coil and a rotor are optimized to increase the magnetic attraction force. The thicknesses of cylindrical portions on the inner-diameter side of the field core and the rotor have larger thicknesses than those of cylindrical portions on its outer-diameter side so that the sectional areas of both cylindrical portions will be equal to each other. Also, a rotation transmission device provided with an electromagnetic clutch is proposed which can avoid deterioration of its sealing property and damage to its bearing and avoid cost increase.
摘要:
A rotation transmission device includes inner and outer rings, a two-way clutch mounted between the outer and inner rings, and an electromagnetic clutch mounted adjacent to the two-way clutch. The electromagnetic clutch includes a rotor guide pressed onto the outer ring at its open end and a rotor pressed into the rotor guide. The rotor guide is made of a magnetic material having the same or substantially the same coefficient of linear expansion as the material of the rotor. Thus, even when the rotor guide and the rotor are heated and expanded, the interference between the rotor and the rotor guide remains substantially constant. Therefore, the rotor and the rotor guide can be reliably coupled together with a simple structure and at a low cost.
摘要:
A rotation transmission device is provided which is used to selectively transmit power. The aim is to stabilize the frictional torque when the rotor of an electromagnet absorbs an armature. A retainer is mounted between an inner member and an outer member, and is formed with a plurality of pockets, and engaging elements are mounted in the pockets. An armature is mounted so as to be nonrotatable but axially movable relative to the retainer, and a rotor is mounted to the inner member or the outer member so as to axially oppose the armature. An electromagnet attracts the armature to the rotor, thereby changing the phase of the retainer to bring the engaging elements into engagement with the outer periphery of the inner member and the inner periphery of the outer member, and thereby transmitting a turning torque between the inner member and the outer member. When the armature is attracted to the rotor, the large-diameter portion of the armature is attracted to the rotor.
摘要:
A two-way clutch comprising an input system rotational member (10) adapted to be rotatably driven by a driving source, an output system rotational member (60, 140) for taking out outwardly a torque transferred from the input system rotational member (10), and a torque transferring member (50, 150a,150b) interposed between the input system rotational member (10) and the output system rotational member (60, 140) for selectively making the two rotational members engage and disengage each other, wherein in order to perform securely torque transfer and cut off between the input and output systems and avoid any influence of an external force applied from the output system during torque transfer, the torque transferring member (50, 150a, 150b) is adapted to transfer torque in both forward and backward rotating directions while it engages the input system rotational member (10) and the output system rotational member (60, 140) and the output system rotational member (60, 140) is adapted to freely rotate only when the torque transferring member (50, 150a, 150b) is released from the output system rotational member (60, 140).
摘要:
A rotation transmission device includes inner and outer rings, a two-way clutch mounted between the outer and inner rings, and an electromagnetic clutch mounted adjacent to the two-way clutch. The electromagnetic clutch includes a rotor guide pressed onto the outer ring at its open end and a rotor pressed into the rotor guide. The rotor guide is made of a magnetic material having the same or substantially the same coefficient of linear expansion as the material of the rotor. Thus, even when the rotor guide and the rotor are heated and expanded, the interference between the rotor and the rotor guide remains substantially constant. Therefore, the rotor and the rotor guide can be reliably coupled together with a simple structure and at a low cost.
摘要:
The magnetic attraction force of an electromagnetic coil in an electromagnetic clutch is increased in a limited installation space, thereby improving reliability of operation. The dimensions of a field core housing the electromagnetic coil and a rotor are optimized to increase the magnetic attraction force. The thicknesses of cylindrical portions on the inner-diameter side of the field core and the rotor have larger thicknesses than those of cylindrical portions on its outer-diameter side so that the sectional areas of both cylindrical portions will be equal to each other. Also, a rotation transmission device provided with an electromagnetic clutch is proposed which can avoid deterioration of its sealing property and damage to its bearing and avoid cost increase.
摘要:
A sealing apparatus (20) has a slinger (22) with a substantially L-shaped cross-section including a cylindrical portion (22a) to be fitted on a member of rotational side and an upstanding portion (22b) radially extending from one end of the cylindrical portion (22a). The apparatus also has a core member (23a) of a substantially L-shaped cross-section including a cylindrical portion (23aa) to be fitted in a member of stationary side and an upstanding portion (23ab) radially extending from one end of the cylindrical portion. Further included is a sealing element (23b) including one ore more side lips (23ba) and (23ba) adapted to be slidably contacted with the upstanding portion (22b) of the slinger (22) and one or more radial lips (23bb) adapted to be slidably contacted with the cylindrical portion (22a) of the slinger (22). An interference of a portion of the cylindrical portion (23aa) and/or (22a) of the core member (23a) and/or the slinger (22) near the upstanding portion (23ab) and/or (22b) is formed smaller than that of the other portion of the cylindrical portion (23aa) and/or (22a) of the core member (23a) and/or the slinger (22).
摘要:
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).
摘要:
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.
摘要:
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.The lash adjuster includes a cylindrical case 13 having a bottom 17 and received in a mounting hole 6 formed in a top surface of a cylinder head 2, the case 13 having an internal thread 14 on an inner periphery thereof, an adjusting screw 16 having an external thread 15 on an outer periphery thereof which is in threaded engagement with the internal thread 14 of the case 13, and a return spring 18 disposed between the adjusting screw 16 and the bottom 17 of the case 13 and biasing the adjusting screw 16 in a direction to protrude upwardly from the case 13, the adjusting screw 16 having a protruding end 22 protruding from the case 13 and configured to pivotally support an arm 7 of a valve gear, wherein an anti-rotation protrusion 27 is provided on the bottom 17 of the case 13 which is fitted in a fitting port 26 formed in an inner bottom surface 24 of the mounting hole 6, thereby preventing rotation of the case 13.