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CN-224210563-U - Z-axis coaxiality decoupling assembly of 3D printer

CN224210563UCN 224210563 UCN224210563 UCN 224210563UCN-224210563-U

Abstract

The utility model discloses a Z-axis coaxiality decoupling assembly of a 3D printer, which comprises an upper plate, a middle plate and a lower plate which are arranged in a stacked manner from top to bottom, wherein a first sliding structure is arranged between the upper plate and the middle plate at intervals, a second sliding structure is arranged between the middle plate and the lower plate at intervals, the sliding directions of the first sliding structure and the second sliding structure are horizontally arranged and mutually perpendicular, so that the motion interference in the X-axis and Y-axis directions is effectively decoupled through the horizontally arranged first sliding structure and the horizontally arranged second sliding structure, the extra force and moment generated by the coaxiality problem are solved, the generation of extra vibration or noise is reduced or even avoided, the abrasion is reduced, the stability of the Z-axis motion is ensured, the service life of a mechanism is prolonged, and the printing quality is ensured.

Inventors

  • SHEN JUYING
  • ZHU YONGSHU
  • HOU SHUANGLONG

Assignees

  • 中纤三维科技(苏州)有限公司

Dates

Publication Date
20260508
Application Date
20250522

Claims (10)

  1. 1. A Z-axis coaxiality decoupling assembly of a 3D printer is characterized by comprising an upper plate (1), a middle plate (2) and a lower plate (8) which are arranged in a stacked mode from top to bottom, wherein a first sliding structure is arranged between the upper plate (1) and the middle plate (2) at intervals, a second sliding structure is arranged between the middle plate (2) and the lower plate (8) at intervals, and the sliding directions of the first sliding structure and the second sliding structure are horizontally arranged and mutually perpendicular.
  2. 2. The Z-axis coaxiality decoupling assembly of a 3D printer of claim 1, wherein the first sliding structure and the second sliding structure are axially positioned in the same horizontal plane.
  3. 3. The Z-axis coaxiality decoupling assembly of the 3D printer according to claim 1 or 2, wherein the first sliding structure and the second sliding structure comprise a shaft sleeve and a pin shaft penetrating through the shaft sleeve along the axial direction, and the pin shaft is assembled in the shaft sleeve in a sliding manner along the axial direction.
  4. 4. A Z-axis coaxiality decoupling assembly of a 3D printer according to claim 3, wherein the shaft sleeves in the first sliding structure are in interference fit with the upper plate (1), the pin shafts at two ends of the shaft sleeves are in fit with the middle plate (2), the shaft sleeves in the second sliding structure are in interference fit with the lower plate (8), and the pin shafts at two ends of the shaft sleeves are in fit with the middle plate (2).
  5. 5. The Z-axis coaxiality decoupling assembly of the 3D printer according to claim 4, wherein the two opposite ends of the upper plate (1) extend downwards to form lower protruding arms (11), the two opposite ends of the lower plate (8) extend upwards to form upper protruding arms (81), the upper protruding arms (81) and the lower protruding arms (11) are positioned on four sides perpendicular to each other, grooves (21) for assembling the upper protruding arms (81) and the lower protruding arms (11) are formed in the middle plate (2), the shaft sleeves are assembled in the corresponding upper protruding arms (81) or the lower protruding arms (11) in an interference mode, shaft holes (22) coaxial with the shaft sleeves are formed in the two opposite wall surfaces of the grooves (21) in a penetrating mode, and the pin shafts are assembled in the shaft holes (22).
  6. 6. The Z-axis coaxiality decoupling assembly of the 3D printer according to claim 5, wherein shaft sleeve holes (12) for interference fit of corresponding shaft sleeves are respectively formed in the upper protruding arms (81) and the lower protruding arms (11), the axial length of the shaft sleeves is smaller than that of the shaft sleeve holes (12), two ends of the shaft sleeves are retracted relative to the holes at two ends of the shaft sleeve holes (12), and the horizontal distance between opposite wall surfaces of the grooves (21) is larger than the width dimension corresponding to the upper protruding arms (81) and the width dimension corresponding to the lower protruding arms (11).
  7. 7. The Z-axis coaxiality decoupling assembly of the 3D printer according to claim 5, wherein the limiting piece (5) is arranged in the shaft hole (22) positioned outside the two end heads of the pin shaft.
  8. 8. The Z-axis coaxiality decoupling assembly of the 3D printer according to claim 7, wherein the limiting piece (5) is a screw, and the screw penetrates through the shaft hole (22) up and down and is locked on the middle plate (2).
  9. 9. The Z-axis coaxiality decoupling assembly of the 3D printer is characterized in that the grooves (21) are formed in the middle plate (2) in a penetrating mode up and down, the upper protruding arms (81) of the lower plate (8) penetrate through the corresponding grooves (21) upwards, the lower protruding arms (11) of the upper plate (1) penetrate through the corresponding grooves (21) downwards, the first concave structures (13) for enabling the upper protruding arms (81) to be assembled and avoided are formed in the bottom surface of the upper plate (1), and the second concave structures (82) for enabling the lower protruding arms (11) to be assembled and avoided are formed in the bottom surface of the lower plate (8).
  10. 10. The Z-axis coaxiality decoupling assembly of the 3D printer according to claim 1 or 2 is characterized in that a central hole (9) is formed in the upper plate (1), the middle plate (2) and the lower plate (8) in a penetrating mode, the upper plate (1) is assembled on the bottom surface of the lifting plate (10), a nut seat (40) is arranged on the bottom surface of the lower plate (8), nuts on the nut seat (40) are contained in the central hole (9), and a screw rod (30) is assembled in the penetrating mode through the nuts in a penetrating mode.

Description

Z-axis coaxiality decoupling assembly of 3D printer Technical Field The utility model relates to the technical field of 3D printers, in particular to a Z-axis coaxiality decoupling assembly of a 3D printer. Background In the Z-axis motion mechanism of the 3D printer, the problem of coaxiality caused by factors such as machining, assembly and the like is limited, additional force and torque can be generated, so that a force transmission component screw rod and a nut are stressed unevenly, a 3D printing platform can be interfered by motion in the X-axis direction and the Y-axis direction in the Z-axis motion process, additional vibration and noise are generated, the abrasion of components is accelerated, the service life of the mechanism is prolonged, and even a spray head generates position deviation of each layer in multilayer printing in the Z-axis direction, so that the printing quality is influenced. Disclosure of utility model In order to solve the problems, the application provides the Z-axis coaxiality decoupling assembly of the 3D printer, which is reasonable in structure, so that motion interference in the X-axis and Y-axis directions is effectively decoupled, additional force and moment generated by coaxiality problems are solved, generation of additional vibration or noise is reduced or even avoided, abrasion is reduced, stability of Z-axis motion is ensured, the service life of a mechanism is prolonged, and printing quality is ensured. The technical scheme adopted by the utility model is as follows: The Z-axis coaxiality decoupling assembly of the 3D printer comprises an upper plate, a middle plate and a lower plate which are arranged in a stacked mode from top to bottom, wherein a first sliding structure is arranged between the upper plate and the middle plate at intervals, a second sliding structure is arranged between the middle plate and the lower plate at intervals, and the sliding directions of the first sliding structure and the second sliding structure are horizontally arranged and mutually perpendicular. As a further improvement of the above technical scheme: The first sliding structure and the second sliding structure are axially positioned in the same horizontal plane in the sliding direction. The first sliding structure and the second sliding structure comprise shaft sleeves and pin shafts penetrating through the shaft sleeves along the axial direction, and the pin shafts are assembled in the shaft sleeves in a sliding manner along the axial direction. The shaft sleeve in the first sliding structure is in interference fit with the upper plate, the pin shafts at the two ends of the shaft sleeve are in interference fit with the middle plate, the shaft sleeve in the second sliding structure is in interference fit with the lower plate, and the pin shafts at the two ends of the shaft sleeve are in interference fit with the middle plate. The two opposite ends of the upper plate extend downwards to form lower protruding arms, the two opposite ends of the lower plate extend upwards to form upper protruding arms, the upper protruding arms and the lower protruding arms are located on four sides perpendicular to each other, grooves for assembling the upper protruding arms and the lower protruding arms are formed in the middle plate, the shaft sleeve is assembled in the corresponding upper protruding arms or the lower protruding arms in an interference mode, shaft holes coaxial with the shaft sleeve are formed in the two opposite wall surfaces of the grooves in a penetrating mode, and the pin shaft is assembled in the shaft holes. The upper protruding arm and the lower protruding arm are respectively provided with a shaft sleeve hole for interference fit of a corresponding shaft sleeve, the axial length of the shaft sleeve is smaller than that of the shaft sleeve hole, two ends of the shaft sleeve are retracted relative to the openings at two ends of the shaft sleeve hole, and the horizontal distance between the opposite wall surfaces of the groove is larger than the width dimension corresponding to the upper protruding arm and the width dimension corresponding to the lower protruding arm. And limiting pieces are arranged in shaft holes positioned outside the ends of the two ends of the pin shaft. The limiting piece is a screw, and the screw penetrates through the shaft hole from top to bottom and is locked on the middle plate. The upper plate bottom surface is provided with a first concave structure for the upper protruding arm to be assembled and avoided, and the lower plate bottom surface is provided with a second concave structure for the lower protruding arm to be assembled and avoided. The upper plate is assembled on the bottom surface of the lifting plate, the bottom surface of the lower plate is provided with a nut seat, nuts on the nut seat are accommodated in the central holes, and a screw rod is assembled on the upper and lower through nuts in a screw mode. Compared with the prior art,