How can the thimble be fitted with bearings?
The structure of the utility model is an upper and a lower thimble structures, wherein the shaft is fixed in the vertical direction and is directly pressed into the rotor by the direct acting force.Thimble:Thimble (English: Die thimble) is a plastic mold parts, used in plastic mold. The thimble can also be called a putter, a pin, a needle, a needle, etc. sometimes the center of a lathe is also called a thimble.(1) in the plastic mold, the product is separated from the mold, is also the most commonly used;(2) hard alloy such as tungsten steel thimble thimble, can be used to pass long thin hole;(3) it is also called the top thimble assembly in a lathe or grinding machine, used to support the workpiece and workpiece to rotate around the head of the conical metal rods, but with plastic mould parts of the thimble is completely different things;(4) plastic mold thimble can also be used in the mold inside, it can play a stabilizing role, is called inserted needle.The types of plastic die thimble are: dome needle, needle, standard thimble, non-standard thimble, and so onPlastic mold thimble materials are SKH51, SKD61, SKD11, 65Mn and so onSKH51 thimble better toughness than SKD61; SKD61 can be 1600 degrees high temperature resistant thimble, thimble SKD61 surface nitriding can be very good to improve the wear resistance of the thimble, the thimble 65Mn because of its poor quality, the quality is brittle and easily broken, most of the plastic mold is not assembling and using 65Mn material thimble.
Center mounting bearing. Refer to the structure of the rotary center, and the slewing center is used to realize the rotation of the bearing.
Disclosed is a double needle into the rotor shaft device, including the thimble assembly, is arranged on the upper thimble assembly and is connected with the upper thimble assembly coaxial components, and on the lower thimble thimble assembly and the upper thimble assembly is connected the movement limiting assembly, assembly and movement on the thimble or one of the two limiting component is connected with the the pressure component. The utility model adopts an upper and a lower thimble structure, the shaft is fixed in the vertical direction, and the rotor is directly pressed into the rotor by the direct acting force. By adopting the shaft entering method and the device, the shoulder of the shaft can be cancelled, and the grinding allowance is not needed on the bearing file, thereby saving material cost and reducing process cost. And into the shaft in the vertical direction of the shaft well fixed position, the shaft can assure the bearing gear beating within 0.05mm, fully meet the requirements of automotive alternator, eliminating the input shaft after the bearing gear grinding processing steps. The utility model has the advantages of simple structure and low cost.
