Large-scale axle intelligent cross wedge rolling mill for rail transit

A large-scale axle intelligent cross wedge rolling mill for rail transit, comprising a main transmission device (1), a memorial arch unit (2), two worm-gear pressing devices (3), a roll assembly (4) and two guide devices (5), wherein:

• the main transmission device (1) comprises a main drive motor (101), a primary reducer (102) and a transfer case (103), wherein an output shaft of the main drive motor (101) is connected with an input shaft of the primary reducer (102), an output shaft of the primary reducer (102) is connected with an input shaft of the transfer case (103), two output shafts of the transfer case (103) are connected with an upper transmission shaft (404) and a lower transmission shaft (406) through two universal couplings (104), respectively, the two output shafts of the transfer case (103) rotate in a same direction;
• the memorial arch unit (2) comprises a left memorial arch (201), a right memorial arch (202), an I-beam (203) for connecting a lower end of the left memorial arch (201) with a lower end of the right memorial arch (202), and two C-shaped beams (204) for connecting an upper end of the left memorial arch (201) with an upper end of the right memorial arch (202), wherein the C-shaped beams (204) are used to give way for lifting out and replacing a roller;
• the two worm-gear pressing devices (3) are installed at the upper end of the left memorial arch (201) and the upper end of the right memorial arch (202), respectively;
• the roll assembly (4) comprises two upper bearing seats (401) and two lower bearing seats (402), wherein:
• one of the two upper bearing seats (401) and one of the two lower bearing seats (402) are installed within the left memorial arch (201), another of the two upper bearing seats (401) and another of the two lower bearing seats (402) are installed within the right memorial arch (202);
• two clamping sleeves (403) fixed on an upper surface of the two upper bearing seats (401), respectively;
• an end portion of two pressing screws of the two worm-gear pressing devices (3) is provided within the two clamping sleeves (403) for connecting the two worm-gear pressing devices (3) with the two upper bearing seats (401), respectively;
• an upper transmission shaft (404) and an upper slide shaft (405) are provided within the two upper bearing seats (401), respectively;
• a lower transmission shaft (406) and a lower slide shaft (407) are provided within the two lower bearing seats (402), respectively;
• two upper shaft necks (408) are integrated with an inner side end of the upper transmission shaft (404) and an inner side end of the upper slide shaft (405), respectively;
• two lower shaft necks (409) are integrated with an inner side end of the lower transmission shaft (406) and an inner side end of the lower slide shaft (407), respectively;
• a distance between the two lower shaft necks (409) is smaller than a distance between the two upper shaft necks (408);
• the two lower shaft necks (409) are detachably connected with a lower roller (451), the upper shaft necks (408) are detachably connected with an upper roller (452);
• four separation sleeves (454) are provided between the upper slide shaft (405) and one of the two upper bearing seats (401), between the lower slide shaft (407) and one of the two lower bearing seats (402), between the upper transmission shaft (404) and another of the two upper bearing seats (401), between the lower transmission shaft (406) and another of the two lower bearing seats (402), respectively;
• the separation sleeves (454) adopt an internal spline key structure form, the upper slide shaft (405) or the lower slide shaft (407) adopts an external spline key structure form, two of the four separation sleeves (454) are engaged with the upper slide shaft (405) and the lower slide shaft (407), respectively, so that the upper slide shaft (405) and the lower slide shaft (407) have an axial sliding function and torque transmission function;
• eight limit rings (455) are provided at two ends of the four separation sleeves (454), respectively;
• two labyrinth covers (460) are provided between two of the eight limit rings (455) and the one of the two upper bearing seats (401), another two labyrinth covers (460) are provided between another two of the eight limit rings (455) and the one of the two lower bearing seats (402);
• multiple positioning sleeves (461) are provided between the eight limit rings (455) and eight bearing end covers (412), respectively, such that one of the two of the four separation sleeves (454), two of the eight bearing end covers (412) and the one of the two upper bearing seats (401) are connected with each other as a whole, another of the two of the four separation sleeves (454), another two of the eight bearing end covers (412) and the one of the two lower bearing seats (402) are connected with each other as a whole;
• two end portions of two piston rods of two clamping hydraulic cylinders (410) are rotatably connected with an external side of one end of the upper slide shaft (405) and that of the lower slide shaft (407), respectively;
• two cylinder bodies of the two clamping hydraulic cylinders (410) are fixedly installed on two protective cases (411), respectively;
• the two protective case (411) are connected with the eight bearing end covers (412), respectively;
• an expansion and contraction of the two clamping hydraulic cylinders (410) are able to realize an axial movement of the upper slide shaft (405) and the lower slide shaft (407);
• the two guide devices (5) are located at a front side and a rear side of the memorial arch unit (2).