High-wear-resistance two-degree-of-freedom sweep vibration motor
By designing a highly wear-resistant dual-degree-of-freedom sweeping motor in an electric toothbrush, and utilizing a sliding bearing and oil-blocking sleeve structure, the problem of oil leakage in the sliding bearing was solved, enabling the motor to operate in two degrees of freedom, extending the motor's lifespan and improving its wear resistance.
Patent Information
- Application Number
- CN202520427276.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing electric toothbrushes, when achieving dual-degree-of-freedom drive for sweeping and extension, have complex structures, high costs, and are prone to oil leakage in the sliding bearings, affecting the stability and lifespan of the motor.
The high wear-resistant dual-degree-of-freedom sweeping vibratory motor design includes a housing, inner shaft, sliding bearing, and oil baffle sleeve structure. Through the cooperation of the sliding bearing and the oil baffle sleeve, lubricating oil loss is reduced, enabling two-degree-of-freedom operation and enhancing wear resistance.
It extends the motor's lifespan, improves structural stability and wear resistance, reduces maintenance costs, and enhances the motor's applicability.
Smart Images
Figure CN223978532U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to a high wear-resistant dual-degree-of-freedom sweeping vibration motor. Background Technology
[0002] Existing electric toothbrushes typically use rotary motors, magnetic levitation motors, and sonic motors as drive sources to achieve a certain driving mode. When the motor needs to perform two degrees of freedom of movement, namely sweeping and extension, the current approach is to set up two motors and integrate them together to achieve the sweeping and extension functions respectively. However, this structure has problems such as complexity, high cost, and instability.
[0003] In addition, to improve the stability between the rotating shaft and the housing, the industry often uses a sliding bearing between them. However, sliding bearings have revealed serious problems in practical applications, as they are prone to oil leakage. Once the sliding bearing leaks oil, it will not only contaminate other precision components inside the electric toothbrush and shorten the product's lifespan, but may also cause the motor to stall, thus affecting the normal functioning of the electric toothbrush and causing great inconvenience to the user. Utility Model Content
[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by providing a highly wear-resistant dual-degree-of-freedom sweeping vibration motor.
[0005] The purpose of this utility model is achieved through the following technical solution: a highly wear-resistant dual-degree-of-freedom sweeping vibration motor, comprising a housing and an inner shaft; the top of the housing is provided with an upper end cover; the housing is provided with a sweeping vibration assembly and a telescopic assembly along its length; the inner shaft passes through the upper end cover and the housing;
[0006] A first sliding sleeve bearing is provided between the inner shaft branch and the upper end cover; the first sliding sleeve bearing includes a first outer steel sleeve, a first inner steel sleeve and a first inner sliding sleeve; the first outer steel sleeve is fixedly disposed inside the upper end cover; the first inner steel sleeve is movably disposed inside the first outer steel sleeve; the first inner sliding sleeve is disposed between the first inner steel sleeve and the first outer steel sleeve; the inner shaft branch is fixedly sleeved inside the first inner steel sleeve;
[0007] The top of the upper end cover is provided with an upper baffle plate; the upper baffle plate is provided with an upper through hole; the first inner steel sleeve is provided through the upper through hole; the inner shaft is provided with an upper oil baffle sleeve inside the housing; the first inner sliding sleeve is provided between the upper baffle plate and the upper oil baffle sleeve.
[0008] The present invention is further provided that the bottom of the housing is provided with a lower end cover;
[0009] A second sliding sleeve bearing is provided between the inner shaft branch and the lower end cover; the second sliding sleeve bearing includes a second outer steel sleeve, a second inner steel sleeve and a second inner sliding sleeve; the second outer steel sleeve is fixedly disposed inside the lower end cover; the second inner steel sleeve is movably disposed inside the second outer steel sleeve; the second inner sliding sleeve is disposed between the second inner steel sleeve and the second outer steel sleeve; the inner shaft branch is fixedly sleeved inside the second inner steel sleeve;
[0010] The bottom of the lower end cover is provided with a lower baffle plate; the lower baffle plate is provided with a lower through hole; the second inner steel sleeve is provided through the lower through hole; the inner shaft is provided with a lower oil baffle sleeve inside the housing; the second inner sliding sleeve is provided between the lower baffle plate and the lower oil baffle sleeve.
[0011] The present invention is further configured such that the sweeping vibration assembly includes a first fixed iron core disposed within the housing, a first winding frame disposed within the first fixed iron core, and a first coil assembly disposed within the first winding frame; a first movable iron core is fixedly disposed on the inner shaft branch; a first magnet assembly is disposed on the first movable iron core; the first magnet assembly is disposed within the first coil assembly; and the first fixed iron core is disposed on top of the second fixed iron core.
[0012] The telescopic assembly includes a second fixed iron core disposed within the housing, a second winding frame disposed within the second fixed iron core, and a second coil assembly disposed within the second winding frame; a second moving iron core and a third moving iron core are fixedly disposed on the inner shaft branch; the second moving iron core is provided with a second magnet assembly; the third moving iron core is provided with a third magnet assembly; the second magnet assembly is disposed within the top of the second coil assembly; the third magnet assembly is disposed within the bottom of the second coil assembly.
[0013] The present invention is further configured such that the inner shaft branch is a D-shaped flat shaft.
[0014] The present invention is further configured such that the first winding frame is provided with a first limiting plate and a second limiting plate; the inner shaft branch is fixedly provided with a limiting ring; the limiting ring is provided with a limiting rod; and the limiting rod is movably disposed between the first limiting plate and the second limiting plate.
[0015] The present invention is further configured such that the first magnet group includes four first magnets; the four first magnets are arranged circumferentially on the outer wall of the first moving iron core; the first coil group includes a first long coil and a second long coil symmetrically arranged on the first winding frame.
[0016] The present invention is further configured such that the second magnet group includes four second magnets; the four second magnets are disposed at equal angles along the circumferential direction on the outer wall of the second moving iron core; the third magnet group includes four third magnets; the four third magnets are disposed at equal angles along the circumferential direction on the outer wall of the third moving iron core; the second coil group includes a first short coil, a second short coil, a third short coil, and a fourth short coil disposed at equal angles along the circumferential direction on the second winding frame.
[0017] The present invention is further configured such that the high wear-resistant dual-degree-of-freedom sweeping vibration motor also includes an outer shaft branch; the first inner steel sleeve protrudes from the upper through hole and is fixedly sleeved inside the outer shaft branch.
[0018] The present invention is further configured such that the casing, the upper end cover, and the lower end cover are integrally formed by deep drawing of galvanized steel strips.
[0019] The present invention is further configured such that the housing is formed by aluminum extrusion; and the upper end cover and the lower end cover are formed by aluminum CNC machining.
[0020] The beneficial effects of this utility model are as follows: Firstly, by installing a sweeping component inside the housing, the inner shaft can rotate left and right, thus achieving a sweeping function. Secondly, by installing a telescopic component inside the housing, the inner shaft can extend and retract vertically, thus achieving a telescopic function. Thirdly, by installing a first sliding sleeve bearing, the shaft can achieve both left and right sweeping and vertical extension / retraction, allowing the motor to perform two degrees of freedom, extending motor life and enhancing applicability. Finally, the cooperation between the upper oil-blocking sleeve and the upper baffle plate reduces the loss of lubricating oil between the first inner steel sleeve and the first outer steel sleeve, thereby improving overall wear resistance. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a structural schematic diagram from another perspective of the present invention;
[0023] Figure 3 This is a cross-sectional view of the present invention;
[0024] Figure 4 yes Figure 3 A magnified view of part A in the middle;
[0025] Figure 5 yes Figure 3 A magnified view of part B in the middle;
[0026] The components include: 1. Housing; 11. Upper end cover; 12. Lower end cover; 13. Outer shaft branch; 2. Inner shaft branch; 21. First moving iron core; 22. First magnet group; 23. Second moving iron core; 24. Second magnet group; 25. Third moving iron core; 26. Third magnet group; 3. Sweeping vibration assembly; 31. First fixed iron core; 32. First winding frame; 4. Telescopic assembly; 41. Second fixed iron core; 42. Second winding frame. Wire frame; 51. First outer steel sleeve; 52. First inner steel sleeve; 53. First inner sliding sleeve; 61. Upper baffle plate; 62. Upper through hole; 63. Upper oil baffle sleeve; 71. Second outer steel sleeve; 72. Second inner steel sleeve; 73. Second inner sliding sleeve; 81. Lower baffle plate; 82. Lower through hole; 83. Lower oil baffle sleeve; 91. First limiting plate; 92. Second limiting plate; 93. Limiting ring; 94. Limiting rod. Detailed Implementation
[0027] The present invention will be further described in conjunction with the following embodiments.
[0028] Depend on Figures 1 to 5 As can be seen, the high wear-resistant dual-degree-of-freedom sweeping vibration motor described in this embodiment includes a housing 1 and an inner shaft branch 2; the top of the housing 1 is provided with an upper end cover 11; the housing 1 is provided with a sweeping vibration assembly 3 and a telescopic assembly 4 along the length direction inside; the inner shaft branch 2 passes through the upper end cover 11 and the housing 1.
[0029] A first sliding bearing is provided between the inner shaft branch 2 and the upper end cover 11; the first sliding bearing includes a first outer steel sleeve 51, a first inner steel sleeve 52 and a first inner sliding sleeve 53; the first outer steel sleeve 51 is fixedly disposed inside the upper end cover 11; the first inner steel sleeve 52 is movably disposed inside the first outer steel sleeve 51; the first inner sliding sleeve 53 is disposed between the first inner steel sleeve 52 and the first outer steel sleeve 51; the inner shaft branch 2 is fixedly sleeved inside the first inner steel sleeve 52;
[0030] The top of the upper end cover 11 is provided with an upper baffle plate 61; the upper baffle plate 61 is provided with an upper through hole 62; the first inner steel sleeve 52 is provided through the upper through hole 62; the inner shaft branch 2 is provided with an upper oil baffle sleeve 63 inside the housing 1; the first inner sliding sleeve 53 is provided between the upper baffle plate 61 and the upper oil baffle sleeve 63.
[0031] Specifically, the high wear-resistant dual-degree-of-freedom sweeping vibration motor described in this embodiment achieves sweeping vibration by setting a sweeping vibration component 3 inside the housing 1, allowing the inner shaft branch 2 to rotate left and right; secondly, by setting a telescopic component 4 inside the housing 1, the inner shaft branch 2 can extend and retract up and down, achieving telescopic function; in addition, by setting a first sliding sleeve bearing, the shaft branch can better achieve vertical extension and retraction while achieving left and right sweeping vibration, enabling the motor to complete two-degree-of-freedom operation, extending the motor's lifespan, and enhancing its applicability; at the same time, the cooperation between the upper oil-blocking sleeve 63 and the upper baffle plate 61 can reduce the loss of lubricating oil between the first inner steel sleeve 52 and the first outer steel sleeve 51, thereby improving the overall wear resistance.
[0032] The high wear-resistant dual-degree-of-freedom sweeping vibration motor described in this embodiment has a lower end cover 12 at the bottom of the housing 1;
[0033] A second sliding bearing is provided between the inner shaft branch 2 and the lower end cover 12; the second sliding bearing includes a second outer steel sleeve 71, a second inner steel sleeve 72, and a second inner sliding sleeve 73; the second outer steel sleeve 71 is fixedly disposed inside the lower end cover 12; the second inner steel sleeve 72 is movably disposed inside the second outer steel sleeve 71; the second inner sliding sleeve 73 is disposed between the second inner steel sleeve 72 and the second outer steel sleeve 71; the inner shaft branch 2 is fixedly sleeved inside the second inner steel sleeve 72;
[0034] The bottom of the lower end cover 12 is provided with a lower baffle plate 81; the lower baffle plate 81 is provided with a lower through hole 82; the second inner steel sleeve 72 is provided through the lower through hole 82; the inner shaft branch 2 is provided with a lower oil baffle sleeve 83 in the housing 1; the second inner sliding sleeve 73 is provided between the lower baffle plate 81 and the lower oil baffle sleeve 83.
[0035] Specifically, in this embodiment, by using sliding bearings at both ends of the inner shaft branch 2 to cooperate with the housing 1, the shaft branch can achieve both left and right sweeping vibration and up and down extension functions, enabling the motor to complete two degrees of freedom, extending the motor's lifespan and enhancing its applicability. At the same time, the cooperation between the lower oil sleeve 83 and the lower baffle plate 81 can reduce the loss of lubricating oil between the second inner steel sleeve 72 and the second outer steel sleeve 71, thereby improving the overall wear resistance.
[0036] This embodiment describes a high-wear-resistant dual-degree-of-freedom sweeping vibration motor. The sweeping vibration assembly 3 includes a first fixed iron core 31 disposed within a housing 1, a first winding frame 32 disposed within the first fixed iron core 31, and a first coil assembly disposed within the first winding frame 32. A first moving iron core 21 is fixedly disposed on the inner shaft branch 2. The first moving iron core 21 is provided with a first magnet assembly 22. The first magnet assembly 22 is disposed within the first coil assembly. The first fixed iron core 31 is disposed on top of a second fixed iron core 41.
[0037] The telescopic assembly 4 includes a second fixed iron core 41 disposed within the housing 1, a second winding frame 42 disposed within the second fixed iron core 41, and a second coil assembly disposed within the second winding frame 42; the inner shaft branch 2 is fixedly provided with a second moving iron core 23 and a third moving iron core 25; the second moving iron core 23 is provided with a second magnet assembly 24; the third moving iron core 25 is provided with a third magnet assembly 26; the second magnet assembly 24 is disposed within the top of the second coil assembly; the third magnet assembly 26 is disposed within the bottom of the second coil assembly.
[0038] Specifically, this embodiment, through the above-described configuration, allows currents in different directions to be passed through the first coil group, enabling the first moving iron core 21 to drive the shaft to rotate forward or backward, thereby achieving left-right sweeping vibration. Furthermore, by passing currents in different directions through the second coil group, the second moving iron core 23 and the third moving iron core 25 can drive the shaft to move up and down, thereby achieving a telescopic function.
[0039] The high wear-resistant dual-degree-of-freedom sweeping vibration motor described in this embodiment has an inner shaft branch 2 that is a D-shaped flat shaft. This design enhances the radial torque of the inner shaft branch 2 and improves reliability.
[0040] This embodiment describes a high-wear-resistant dual-degree-of-freedom sweeping vibration motor. The first winding frame 32 is equipped with a first limiting plate 91 and a second limiting plate 92. The inner shaft branch 2 is fixedly equipped with a limiting ring 93. The limiting ring 93 is equipped with a limiting rod 94. The limiting rod 94 is movably positioned between the first limiting plate 91 and the second limiting plate 92. This configuration limits the rotation angle of the inner shaft branch 2.
[0041] This embodiment describes a high-wear-resistant dual-degree-of-freedom sweeping vibration motor. The first magnet assembly 22 includes four first magnets, which are circumferentially disposed on the outer wall of the first moving iron core 21. The first coil assembly includes a first long coil and a second long coil symmetrically disposed on the first winding frame 32. In this embodiment, the tail of the first long coil is connected to the tail of the second long coil. The first and second long coils are not shown in the figure. Specifically, through the above arrangement, the first and second long coils are connected together, allowing the inner shaft branch 2 to achieve left and right sweeping vibration in a single-phase manner. Furthermore, the sweeping frequency is adjustable between 3-10 Hz, and the sweeping angle is adjustable between 10-60 degrees.
[0042] This embodiment describes a high-wear-resistant dual-degree-of-freedom sweeping vibration motor. The second magnet group 24 includes four second magnets, which are circumferentially disposed at equal angles on the outer wall of the second moving iron core 23. The third magnet group 26 includes four third magnets, which are circumferentially disposed at equal angles on the outer wall of the third moving iron core 25. The second coil group includes a first short coil, a second short coil, a third short coil, and a fourth short coil, which are circumferentially disposed at equal angles on the second winding frame 42. The first, second, third, and fourth short coils are not shown in the figure.
[0043] This embodiment describes a high-wear-resistant dual-degree-of-freedom sweeping vibration motor, which further includes an outer shaft branch 13. The first inner steel sleeve 52 protrudes from the upper through hole 62 and is fixedly fitted within the outer shaft branch 13. This arrangement facilitates connection to external equipment via the outer shaft branch 13; and the first inner steel sleeve 52 protruding from the upper through hole 62 and fixedly fitted within the outer shaft branch 13 enhances the overall wear resistance of the motor.
[0044] The high wear-resistant dual-degree-of-freedom sweeping vibration motor described in this embodiment is integrally formed by deep drawing galvanized steel strips for the housing 1, upper end cover 11, and lower end cover 12.
[0045] The high wear-resistant dual-degree-of-freedom sweeping vibration motor described in this embodiment has a housing 1 formed by aluminum extrusion; and an upper end cover 11 and a lower end cover 12 formed by aluminum CNC machining.
[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.
Claims
1. A high-wear-resistant two-degree-of-freedom shaker motor, characterized in that: It include the casing (1) and the inner shaft branch (2); The top of the casing (1) is equipped with the upper end cover (11); The casing (1) is equipped with the sweep vibration assembly (3) and the telescopic assembly (4) along the length direction; The inner shaft branch (2) is through the upper end cover (11) and the casing (1); The first sliding sleeve bearing is arranged between the inner shaft branch (2) and the upper end cover (11); The first sliding sleeve bearing includes a first outer steel sleeve (51), a first inner steel sleeve (52) and a first inner sliding sleeve (53); The first outer steel sleeve (51) is fixedly arranged in the upper end cover (11); The first inner steel sleeve (52) is movably arranged in the first outer steel sleeve (51); The first inner sliding sleeve (53) is arranged between the first inner steel sleeve (52) and the first outer steel sleeve (51); The inner shaft branch (2) is fixedly sleeved in the first inner steel sleeve (52); The top of the upper end cover (11) is equipped with the upper blocking plate (61); The upper blocking plate (61) is through equipped with the upper through hole (62); The first inner steel sleeve (52) is through the upper through hole (62); The inner shaft branch (2) is equipped with the upper oil blocking sleeve (63) in the casing (1); The first inner sliding sleeve (53) is arranged between the upper blocking plate (61) and the upper oil blocking sleeve (63).
2. The dual-degree-of-freedom scanning motor with high wear resistance according to claim 1, characterized in that: The bottom of the casing (1) is equipped with the lower end cover (12); The second sliding sleeve bearing is arranged between the inner shaft branch (2) and the lower end cover (12); The second sliding sleeve bearing includes a second outer steel sleeve (71), a second inner steel sleeve (72) and a second inner sliding sleeve (73); The second outer steel sleeve (71) is fixedly arranged in the lower end cover (12); The second inner steel sleeve (72) is movably arranged in the second outer steel sleeve (71); The second inner sliding sleeve (73) is arranged between the second inner steel sleeve (72) and the second outer steel sleeve (71); The inner shaft branch (2) is fixedly sleeved in the second inner steel sleeve (72); The bottom of the lower end cover (12) is equipped with the lower blocking plate (81); The lower blocking plate (81) is through equipped with the lower through hole (82); The second inner steel sleeve (72) is through the lower through hole (82); The inner shaft branch (2) is equipped with the lower oil blocking sleeve (83) in the casing (1); The second inner sliding sleeve (73) is arranged between the lower blocking plate (81) and the lower oil blocking sleeve (83).
3. The dual degree-of-freedom shaker motor of claim 1, wherein: The sweep vibration assembly (3) includes a first fixed iron core (31) arranged in the casing (1), a first bobbin (32) arranged on the first fixed iron core (31), and a first coil group arranged on the first bobbin (32); The inner shaft branch (2) is fixedly provided with a first moving iron core (21); The first moving iron core (21) is provided with a first magnet group (22); The first magnet group (22) is arranged in the first coil group; The first fixed iron core (31) is arranged on the top of the second fixed iron core (41); The telescopic assembly (4) comprises a second fixed iron core (41) arranged in the casing (1), a second bobbin (42) arranged on the second fixed iron core (41), and a second coil group arranged on the second bobbin (42); the inner shaft branch (2) is fixedly provided with a second moving iron core (23) and a third moving iron core (25); the second moving iron core (23) is provided with a second magnet group (24); the third moving iron core (25) is provided with a third magnet group (26); the second magnet group (24) is arranged at the top of the second coil group; and the third magnet group (26) is arranged at the bottom of the second coil group.
4. The dual degree-of-freedom shaker motor of claim 3, wherein: The inner shaft branch (2) is a D-shaped flat shaft.
5. The dual degree-of-freedom shaker motor of claim 3, wherein: The first bobbin (32) is provided with a first limiting plate (91) and a second limiting plate (92); the inner shaft branch (2) is fixedly provided with a limiting ring (93); the limiting ring (93) is provided with a limiting rod (94); and the limiting rod (94) is movably arranged between the first limiting plate (91) and the second limiting plate (92).
6. The dual degree-of-freedom shaker motor of claim 3, wherein: The first magnet group (22) comprises four first magnets; the four first magnets are circumferentially arranged on the outer wall of the first moving iron core (21); the first coil group comprises a first long coil and a second long coil symmetrically arranged on the first bobbin (32).
7. The dual degree-of-freedom shaker motor of claim 3, wherein: The second magnet group (24) comprises four second magnets; the four second magnets are equally angularly circumferentially arranged on the outer wall of the second moving iron core (23); the third magnet group (26) comprises four third magnets; the four third magnets are equally angularly circumferentially arranged on the outer wall of the third moving iron core (25); and the second coil group comprises a first short coil, a second short coil, a third short coil, and a fourth short coil equally angularly circumferentially arranged on the second bobbin (42).
8. The dual degree-of-freedom shaker motor of claim 1, wherein: The high-wear-resistance two-degree-of-freedom sweep motor further comprises an outer shaft branch (13); after the first inner steel sleeve (52) protrudes out of the upper through hole (62), the first inner steel sleeve (52) is arranged in the outer shaft branch (13) in a fixed manner.
9. The dual degree-of-freedom shaker motor of claim 2, wherein: The casing (1), the upper end cover (11), and the lower end cover (12) are integrally formed by deep drawing of a galvanized steel strip.
10. The dual degree-of-freedom shaker motor of claim 2, wherein: The casing (1) is made of aluminum extrusion; and the upper end cover (11) and the lower end cover (12) are made of aluminum cnc machining. The casing (1) is made of aluminum extrusion; and the upper end cover (11) and the lower end cover (12) are made of aluminum cnc machining.