Adjustable nozzle mechanism for variable capacity turbine and its production method

An adjustable nozzle mechanism used in a variable capacity turbine, said variable capacity turbine, comprising:

• a number of nozzle vanes, which are arranged along the circumference of the turbine and provided on the nozzle shafts which are supported on the turbine casing in such a way that the nozzle vanes can rotate, and which vary the vane angle;
• a nozzle driving member driving the nozzle vanes, and enabled to rotate around the turbine shafts by the actuator;
• and a turbine rotor set free for rotation inside the inner radius of the nozzle vanes, thereby said variable capacity turbine is driven for rotation of the turbine rotor by flowing the actuating gas from the scroll in the turbine casing towards the inner radial direction through the nozzle vanes to the turbine rotor;
• said adjustable nozzle mechanism, comprising:
• a plurality of lever plates which are provided between the nozzle mount and said link plate, one end of each lever plate being fitted and fixed to each nozzle shaft after setting the predetermined positional relationship between the wing angle of the nozzle vanes and the fitted direction of the fixing section of said lever plate, each lever plate being provided with a slot which is opened in a nearly radial axis on another edge;
• and the same number of fitting pins protruding along the circumferential direction and toward said lever plate side on said nozzle driving member, said fitting pins being engaged with said slots of said lever plates.