摘要:
An electric actuator 100 includes a screw shaft 111 that is mounted on one end 200T1 of a drag bar 200, and that has a first helical groove 121 on its outer peripheral surface; a rotor 113 that has a hollow portion 113I into which the screw shaft 111 is arranged, wherein a second helical groove 122 corresponding to the first helical groove 121 is formed on a part of the inner peripheral surface of the hollow portion 113I, and other end 200T2 of the drag bar 200 projects from the hollow portion 113I; plural balls 123 arranged between the first groove 121 and the second groove 122; a deflector 112 that is mounted to the rotor 113 for circulating the balls 123; a stator 110 that rotates the rotor 113 so as to move the drag bar 200 in its longitudinal direction; and a rotation preventing member 107 that is engaged with a part of the drag bar 200 so as to prevent the rotation of the drag bar 200.
摘要:
Construction of a friction roller reducer is achieved wherein displacement of intermediate rollers 19 due to the change in thickness in the axial direction of loading cam apparatuses 7a can be performed smoothly, and excellent transmission efficiency can be obtained. Long guide holes 35 that are long in the radial direction of a sun roller 4a and ring-shaped roller 5a are provided in guide blocks 34 that are fastened to a support frame for supporting the end sections of rotation shafts 20 of intermediate rollers 19. The outer rings of ball bearings 36, of which the inner rings are fitted around and fastened to the outside of the end sections of the rotation shafts 20, engage with the long guide holes 35 so as to be able to displace in the radial direction of the sun roller 4a and the ring-shaped roller 5a.
摘要:
Construction capable of improving the convenience of an electric automobile is achieved by making the drive apparatus for an electric automobile in which a planetary-gear transmission 11 is assembled more compact and simple, and increasing the distance traveled per charge. The planetary-gear transmission 11 comprises a single-pinion first planetary-gear mechanism 12 and a double-pinion second planetary-gear mechanism 13, and reduces power from an electric motor 1a by a desired reduction ratio before transmitting that power to a driven-side rotating shaft 5a. A first braking device 14 switches a ring gear 22 and a second braking device 15 switches a second sun gear 19 between a state of being allowed to rotate and a state of being prevented from rotating with respect to a fixed portion.
摘要:
Construction capable of improving the convenience of an electric automobile is achieved by making the drive apparatus for an electric automobile in which a planetary-gear transmission 11 is assembled more compact and simple, and increasing the distance traveled per charge. The planetary-gear transmission 11 comprises a single-pinion first planetary-gear mechanism 12 and a double-pinion second planetary-gear mechanism 13, and reduces power from an electric motor 1a by a desired reduction ratio before transmitting that power to a driven-side rotating shaft 5a. A first braking device 14 switches a ring gear 22 and a second braking device 15 switches a second sun gear 19 between a state of being allowed to rotate and a state of being prevented from rotating with respect to a fixed portion.