Patent ID: 7318360
Filing Date: 2008-01-15
Classification: F16H,Y10T

Abstract:
1. A gearshift handling mechanism comprising: a case body attached in a box of a gear-shifting mechanism of a manual transmission having a pair of side plates which are placed at a fixed space; a support axle attached at an upper part of the center portion of the case body so as to project both ends thereof from said side plates outwardly; an operation lever attached to a part which is projected from one of said side plate of said support axle, shifting due to rotate at a predetermined degree, biasing by a spring to one way; a pivot shaft attached rotatably at a part adjacent the one end of said case body so as to project both ends thereof from said side plates outwardly; a cam for shifting the gear, which is attached fixedly to a part which is positioned between said side plates of said pivot shaft, having a first guide groove, which is formed in the shape of a ring, projecting three projections outwardly at one side surface thereof, capable of guiding a neutral, a first-speed, a second-speed, a third-speed, a fourth-speed, a fifth-speed and said neutral in series; a guide groove for reverse, guiding an outer circumferential part to a fifth-speed direction from a part between said neutral and said fifth-speed when it rotates to an opposite direction; a triangle eccentric second guide groove formed another surface thereof, which is formed in the shape of a ring, capable of guiding said neutral, said first-speed, said second-speed, said third-speed, said fourth-speed, said fifth-speed and said neutral clockwise and counterclockwise in series; and an engaging step part formed at said outer circumferential part of said one side surface, capable of preventing to shift into said fifth-speed from said neutral; a first arm supported rotatably by said support axle which is placed between said side plates, having a first engaging pin formed at a top part thereof and engaging with said first guide groove and said guide groove for reverse of said cam, and handling said shift fork of said manual transmission via a wire or lot; a second arm supported rotatably by said support axle which is placed between said side plates, having a second engaging pin formed at a top part thereof and engaging with said second guide groove of said cam, and handling said shift fork of said manual transmission via said wire or lot; a rotary disk fixed to a projection part from one of said side plates of said pivot shaft, having engaging pins which are positioned between said neutral, said first-speed, said second-speed, said third-speed, said fourth-speed, said fifth-speed and positioned at a part adjacent the outer circumferential part between at least two rotary plates; a rod supported pivotably at a lower part of said operation lever, engaging an engaging part defining a top portion thereof with said engaging pins of the rotary disk in series and allowing the rotary disk to rotate by in accordance with the rotation of said operation lever to the forward-backward direction, biasing said engaging part to the engaging direction against said engaging pins; a fitting cam attached fixedly to a projected part from said another side plate of said pivot shaft, having six concave parts, capable of fitting said pivot shaft to said neutral, said first-speed, said second-speed, said third-speed, said fourth-speed, said fifth-speed; a fitting piece fixed to a projection part from said another side plate of said support axle, having an engaging piece which engages with said concave parts of the fitting cam; and a reverse lever which engages with an engaging step part which is attached to the case body so as to bias to contact with the outer part which is formed said engaging step part of said cam and is prevented to shift into said fifth-speed from said neutral, capable of shifting into said reverse in accordance with releasing an engaging state.