Rotating axle of induction motor

[0026] like image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 As shown, the induction motor of the present invention includes a rotor core (11), a conductor bar (15), a locking (end ring) (17), and a rotating shaft (31). The above-mentioned rotor iron core (11) is formed by several silicon steel plates (12) insulated and laminated, and the silicon steel plate (12) has a shaft hole (13a) and several slots (13b), and each slot of the rotor iron core (11) ( 13b) Conductor rods (15) are formed inside; locking rings (17) are respectively provided at both ends of the rotor iron core (11), and the axis of the rotor iron core (11) is combined with the rotating shaft (31) of the induction motor of the present invention.

[0027] The rotating shaft (31) of the induction motor of the present invention includes a rotating shaft body (32) and a bearing stopper (stopper) (34). (11) Insert the rotor core (11) integrally; the bearing locking device (34) is integrally formed with the rotating shaft body (32), and the bearing locking device (34) keeps the bearings (19) at a certain distance, and the bearings (19) are along the It is arranged on both sides of the rotor iron core (11) along the axial direction of the rotating shaft body (32).

[0028] The rotating shaft body (32) forms a round bar shape with a certain diameter; the two sides of the rotor iron core (11) respectively form bearing locking devices (34), and the bearing locking devices (34) keep the bearings (19) at a certain distance.

[0029] The bearing locking device (34) protrudes from the periphery of the rotating shaft body (32) along the radial direction, and the two bearing locking devices (34) form a corresponding pair along the diameter direction. The inner side of each bearing locking device (34) is respectively formed with grooves (36) which are recessed along the radial direction of the rotating shaft body (32) and extended along the peripheral direction. The groove (36) enables the section of the bearing locking device (34) to be formed at a relatively definite position.

[0030] like Figure 7 As shown, the above-mentioned bearing locking device (34) is formed by a punching (calking) device having a "concave"-shaped upper punch (punch) (41) and a lower die (die). The upper punch (41) has a pair of press surfaces (42, 46) of right angle section spaced from each other relative to the diameter of the rotating shaft body (32).

[0031] Through the above structure, grooves (36) are respectively formed on both sides of the rotating shaft body (32), so that the rotating shaft body (32) can be inserted and combined on the shaft center of the rotor core (11). Then, put the rotating shaft body (32) combined with the rotor core (11) on the lower mold (45), move the upper punch (41) downwards, so that the upper punch (41) is close to the lower mold (45) A part of the peripheral surface of the rotating shaft body (32) protrudes outward along the radial direction between the upper stamping machine (41) and the lower mold (45), and forms a bearing locking device (34) after plastic deformation. After the bearing locking device (34) is formed, the both sides of the rotating shaft body (32) can be inserted into the bearings (19).

[0032] The effect of the invention

[0033] The rotating shaft of the induction motor of the present invention as described above has the following structure: a rotating shaft body in the shape of a round bar is inserted and combined with the shaft center of the rotor core, and the rotating shaft body can rotate integrally with the rotor core; The length direction of the rotating shaft body protrudes from the outer peripheral surface of the rotating shaft body along the radial direction at a certain distance to form a bearing locking device. The bearing locking device is integrated with the rotating shaft body. The rotating shaft of the induction motor of the present invention has the following characteristics compared with the rotating shaft of the conventional induction motor. The rotating shaft of the conventional induction motor uses an independent brake ring in order to maintain a constant distance between the bearings. Because the present invention does not use a separate brake ring, the number of components is reduced and the assembling process is simplified, thereby reducing costs, and preventing detachment of the brake ring and poor bearing position due to wrong assembly of the brake ring.