Outer rotor brushless motor for tattoo machine

Abstract

The utility model relates to the technical field of outer rotor brushless motors, and particularly discloses an outer rotor brushless motor for a tattooing machine, a rotor set comprises a shell, a magnetic ring and an output shaft, a mounting seat covers the upper end of the shell, the output shaft is mounted in the shell, and a first bearing and a second bearing are respectively mounted at the upper end and the lower end of the output shaft; inner rings of the first bearing and the second bearing are fixed on the output shaft, a screw hole is formed in the mounting seat, a screw sleeve is mounted in the screw hole, a mounting hole for mounting the first bearing is formed in the screw sleeve, and an outer ring of the first bearing is tightly attached to the inner wall of the mounting hole, so that the outer ring of the first bearing moves outwards along with the screw sleeve when the screw sleeve moves outwards. The utility model has the advantages of simple structure, fine adjustment of pre-pressing, reduction of friction and noise, reduction of vibration, prevention of rigidity deterioration, improvement of working efficiency and capability of meeting use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of outer rotor brushless motors, in particular to an outer rotor brushless motor for a tattoo machine. Background Art

[0002] The noise generated by the ball bearing motors currently used in tattoo machines has not been effectively solved. Since most domestic ball bearing motors use positioning preload and spring preload structures, cumulative tolerance problems are prone to occur between various components. When the preload is too large, the friction torque increases and the noise also increases. If the preload is too small, the vibration increases and the rigidity deteriorates, which cannot meet the use requirements. Utility Model Content

[0003] In response to the above-mentioned defects of the prior art, the utility model provides an outer rotor brushless motor for a tattoo machine, which has a simple structure, can fine-tune the preload, reduce friction and noise, reduce vibration, avoid its rigidity deterioration, improve work efficiency, and can meet usage requirements.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A brushless motor with an outer rotor for a tattoo machine comprises a stator assembly, a rotor assembly and a mounting seat. The rotor assembly comprises a housing, a magnetic ring and an output shaft. The mounting seat covers the upper end of the housing. The output shaft is mounted in the housing. A first bearing and a second bearing are mounted on the upper and lower ends of the output shaft, respectively. The inner rings of the first bearing and the second bearing are fixed to the output shaft. The mounting seat is provided with a screw hole. A screw sleeve is mounted in the screw hole. The screw sleeve is provided with a mounting hole for mounting the first bearing. The outer ring of the first bearing is in close contact with the inner wall of the mounting hole, so that when the screw sleeve moves outward, the outer ring of the first bearing moves outward accordingly.

[0006] In the above description, preferably, a button groove for rotation is provided on the screw sleeve.

[0007] In the above description, preferably, a meson is provided at the upper end of the first bearing, a first washer is provided between the meson and the first bearing, and the upper end of the output shaft passes through the first bearing, the first washer and the meson in sequence.

[0008] In the above description, preferably, the meson is tightly connected to the output shaft.

[0009] In the above description, preferably, a central shaft hole is provided at the bottom of the housing, the second bearing is provided at the opening of the central shaft hole, and the lower end of the output shaft passes through the second bearing and is installed in the central shaft hole.

[0010] In the above description, preferably, a second washer is provided between the second bearing and the central shaft hole.

[0011] In the above description, preferably, the mounting seat includes an annular plate and a cylinder arranged at the lower end of the annular plate, a PCB board is installed at the lower end of the annular plate, and the stator assembly is arranged outside the cylinder.

[0012] In the above description, preferably, the magnetic ring is arranged outside the stator assembly, and the stator assembly includes an iron core and a winding.

[0013] In the above description, preferably, the magnetic ring is fixedly connected to the housing by gluing.

[0014] In the above description, preferably, the first bearing and the second bearing are both ball bearings.

[0015] The beneficial effects produced by the utility model are as follows: the first bearing and the second bearing are respectively installed at the upper and lower ends of the output shaft, the inner rings of the first bearing and the second bearing are fixed on the output shaft, a screw hole is provided on the mounting seat, a screw sleeve is installed in the screw hole, and a mounting hole for installing the first bearing is provided on the screw sleeve, the outer ring of the first bearing is close to the inner wall of the mounting hole, effectively limiting the position of the first bearing, and effectively preventing the transmission shaft from axial stringing. At the same time, when the screw sleeve moves outward, the outer ring of the first bearing moves outward accordingly, and the inner rings of the first bearing and the second bearing are fixedly installed on the output shaft. The outer ring of the first bearing can move outward along with the screw sleeve to a predetermined position, and the preload can be fine-tuned to improve accuracy, reduce bearing defects caused by preload problems, reduce friction and noise, reduce vibration, avoid its rigidity deterioration, improve work efficiency, and meet usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : It is a structural diagram of an embodiment of the present utility model;

[0017] Figure 2 : It is a schematic diagram of the exploded structure of an embodiment of the present utility model;

[0018] Figure 3 : It is a schematic cross-sectional view of an embodiment of the present utility model;

[0019] Description of the accompanying drawings: 10-mounting seat, 11-screw hole, 12-screw sleeve, 13-mounting hole, 14-first bearing, 15-meson, 16-first washer, 17-annular plate, 18-cylinder, 19-PCB board, 20-housing, 21-magnetic ring, 22-output shaft, 23-second bearing, 24-center shaft hole, 25-second washer, 30-stator assembly. DETAILED DESCRIPTION

[0020] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] This embodiment: Figure 1-3 As shown, a brushless motor with an outer rotor for a tattoo machine, this product is used for a tattoo machine, and includes a stator assembly 30, a rotor assembly and a mounting base 10;

[0022] The rotor assembly includes a housing 20, a magnetic ring 21 and an output shaft 22. The magnetic ring 21 is fixedly connected to the housing 20 by gluing. The magnetic ring 21 is arranged on the outside of the stator assembly 30. The mounting seat 10 covers the upper end of the housing 20. The output shaft 22 is installed in the housing 20. The mounting seat 10 is provided with a screw hole 11. The first bearing 14 is installed in the screw hole 11 through a screw sleeve 12. The screw sleeve 12 is provided with a mounting hole 13. The first bearing 14 is installed in the mounting hole 13, and the outer ring of the first bearing 14 is close to the inner wall of the mounting hole 13. The screw sleeve 12 is provided with a button groove for rotation. The knob nut 12 is turned by an external tool and the button groove. When the screw sleeve 12 moves outward The outer ring of the first bearing 14 moves outward, and a meson 15 is provided at the upper end of the first bearing 14. A first washer 16 is provided between the meson 15 and the first bearing 14. The upper end of the output shaft 22 passes through the first bearing 14, the first washer 16 and the meson 15 in sequence and extends outward. The meson 15 is tightly connected with the output shaft 22. A second bearing 23 is installed at the lower end of the output shaft 22. A central shaft hole 24 is provided at the bottom of the housing 20. The second bearing 23 is arranged at the opening of the central shaft hole 24. The lower end of the output shaft 22 passes through the second bearing 23 and is installed in the central shaft hole 24. A second washer 25 is provided between the second bearing 23 and the central shaft hole 24.

[0023] The first bearing 14 and the second bearing 23 are both ball bearings;

[0024] The mounting base 10 includes an annular plate 17 and a cylinder 18 provided at the lower end of the annular plate 17. A PCB board 19 is installed at the lower end of the annular plate 17. The stator assembly 30 is provided outside the cylinder 18.

[0025] The stator assembly 30 includes an iron core and a winding, and both the iron core and the winding are disposed outside the output shaft 22 .

[0026] During use, the inner rings of the first bearing 14 and the second bearing 23 are fixed on the output shaft 22, and the outer ring of the first bearing 14 can move outward following the screw sleeve 12 to a predetermined position, thereby fine-tuning the preload, improving accuracy, and reducing bearing defects caused by preload problems. It can effectively prevent axial stringing of the drive shaft, reduce friction and noise, reduce vibration, avoid deterioration of its rigidity, improve work efficiency, and meet usage requirements.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made to the above embodiment based on the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A brushless motor with an outer rotor for a tattoo machine, comprising a stator assembly, a rotor assembly, and a mounting base, characterized in that: The rotor assembly includes a shell, a magnetic ring and an output shaft. The mounting seat cover is closed on the upper end of the shell, and the output shaft is installed in the shell. The upper and lower ends of the output shaft are respectively installed with a first bearing and a second bearing. The inner rings of the first bearing and the second bearing are fixed on the output shaft. A screw hole is provided on the mounting seat, and a screw sleeve is installed in the screw hole. The screw sleeve is provided with a mounting hole for installing the first bearing. The outer ring of the first bearing is close to the inner wall of the mounting hole, so that when the screw sleeve moves outward, the outer ring of the first bearing moves outward accordingly.

2. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: The screw sleeve is provided with a button groove for rotation.

3. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: A meson is provided at the upper end of the first bearing, a first washer is provided between the meson and the first bearing, and the upper end of the output shaft passes through the first bearing, the first washer and the meson in sequence.

4. The outer rotor brushless motor for a tattoo machine according to claim 3, characterized in that: The meson is tightly connected to the output shaft.

5. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: A central shaft hole is provided at the bottom of the shell, a second bearing is arranged at the opening of the central shaft hole, and the lower end of the output shaft passes through the second bearing and is installed in the central shaft hole.

6. The outer rotor brushless motor for a tattoo machine according to claim 5, characterized in that: A second washer is provided between the second bearing and the central shaft hole.

7. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: The mounting seat includes an annular plate and a cylinder arranged at the lower end of the annular plate. The lower end of the annular plate is equipped with a PCB board, and the stator assembly is arranged outside the cylinder.

8. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: The magnetic ring is arranged outside the stator group, and the stator group includes an iron core and a winding.

9. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: The magnetic ring is fixedly connected to the shell by gluing.

10. The outer rotor brushless motor for a tattoo machine according to claim 1, characterized in that: The first bearing and the second bearing are both ball bearings.

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