CN212726617U - Micromotor rotor and medical micromotor - Google Patents
Micromotor rotor and medical micromotor Download PDFInfo
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- CN212726617U CN212726617U CN202021834535.6U CN202021834535U CN212726617U CN 212726617 U CN212726617 U CN 212726617U CN 202021834535 U CN202021834535 U CN 202021834535U CN 212726617 U CN212726617 U CN 212726617U
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Abstract
The utility model discloses a micromotor rotor and medical micromotor, micromotor rotor include cylindrical rotor main part and pivot, the pivot include primary shaft spare and with the secondary shaft spare of the coaxial setting of this primary shaft spare or be provided with circular hole on the secondary shaft spare, rotor main part packs into in the inner bore, just rotor main part's external diameter with the internal diameter interference fit of hole, secondary shaft spare set up in the drill way department of hole. The micro motor rotor of the utility model has high matching coaxial precision of the rotor main body and the rotating shaft, small unbalance amount of the rotor, more stable motor operation, and more obvious advantage especially on a high-speed motor; moreover, the rotor main body of the micromotor rotor is mainly in interference fit with the rotating shaft in strength instead of glue, and the rotating shaft and the magnetic steel cannot fall off or slide due to glue failure under severe working conditions or in long-term use.
Description
Technical Field
The utility model relates to a medical micromotor technical field especially relates to a micromotor rotor and have medical micromotor of this rotor.
Background
The coreless motor can be generally classified as a micro motor, and is commonly used in medical handheld devices due to its advantages of small size, high rotational speed, light weight, no cogging torque, and the like. The micromotor structurally breaks through the structural form of the traditional motor, adopts a tooth-groove-free iron core or an iron core-free structure, thoroughly eliminates the rotating speed fluctuation caused by the tooth-groove effect, and simultaneously reduces the vibration and the noise of the micromotor, thereby improving the service performance of the micromotor.
The existing micromotor generally comprises a stator with a plurality of coils and a rotor arranged in the stator, the rotor mostly comprises a cylindrical rotor main body and a rotating shaft, the rotor main body is made of a permanent magnet material, an inner hole is formed in the center of the rotor main body, the rotating shaft is arranged in the inner hole in a penetrating mode, the outer diameter of the rotating shaft and the inner diameter of the inner hole are in clearance fit, and the rotating shaft and magnetic steel are bonded and fixed through glue. The rotor with the structure has poor processing precision of the inner hole of the rotor main body, so that the matching coaxiality between the rotor main body and the rotating shaft is poor, the unbalance amount of the rotor is large, and the motor vibration is easily caused; in addition, the rotating shaft and the rotor can fall off or slide due to the failure of glue under severe working conditions or long-term use.
Disclosure of Invention
The utility model aims to solve a technical problem that a pivot is high with the coaxial precision of rotor main part cooperation and the micromotor rotor that is difficult for becoming invalid in abominable operating mode or long-term the use is provided. Another technical problem to be solved by the present invention is to provide a medical micro-motor with the above-mentioned electronic rotor.
In order to solve the technical problem, the utility model provides a micromotor rotor, including cylindrical rotor main part and pivot, the pivot includes primary shaft spare and with the secondary shaft spare of the coaxial setting of this primary shaft spare be provided with circular hole on the primary shaft spare, rotor main part packs into in the inner hole, just rotor main part's external diameter with the internal diameter interference fit of hole, secondary shaft spare set up in the drill way department of hole.
The micro motor rotor of the utility model has the advantages that the outer wall of the rotor main body can be processed with very high precision, the inner hole is arranged on the rotating shaft, the rotor main body is arranged in the inner hole of the rotating shaft, and the outer wall of the rotor main body and the inner wall of the inner hole are positioned and installed, so that the matching coaxial precision of the rotor main body and the rotating shaft is high, the unbalance amount of the rotor is very small, the motor can run more stably, and the advantages are more obvious especially on a high-speed motor; moreover, the rotor main body of the micromotor rotor is mainly in interference fit with the rotating shaft in strength instead of glue, and the rotating shaft and the magnetic steel cannot fall off or slide due to glue failure under severe working conditions or in long-term use.
In one embodiment, the first shaft member includes a cylindrical body portion extending in the axial direction, the cylindrical body portion is provided with the inner hole, the second shaft member includes a plug portion, the plug portion is inserted into the hole of the inner hole, and the outer diameter of the plug portion is in interference fit with the inner diameter of the hole of the inner hole.
In one embodiment, one end of the rotor body is in contact with the bottom surface of the inner bore, and the other end is in contact with the end surface of the plug portion.
In one embodiment, the opening of the inner hole is provided with a flaring section, and the inner diameter of the flaring section is larger than that of the inner hole.
In one embodiment, the plug portion is step-shaped and comprises a small-diameter section and a large-diameter section which are sequentially connected from front to back, the outer diameter of the small-diameter section is in interference fit with the inner diameter of the inner hole, and the outer diameter of the large-diameter section is in interference fit with the inner diameter of the flaring portion.
In one embodiment, the first shaft member further comprises a first shaft head portion having an outer diameter smaller than an outer diameter of the barrel portion; the second shaft member further includes a second shaft head portion having an outer diameter smaller than an outer diameter of the plug portion.
In one embodiment, the first shaft member is provided with a first through hole communicated with the inner hole, and the second shaft member is provided with a second through hole communicated with the inner hole.
In one embodiment, the first through hole and the second through hole each extend in an axial direction of the rotating shaft.
In one embodiment, the center of the rotor body is provided with a center hole, one end of which is communicated with the first through hole, and the other end of which is communicated with the second through hole.
The utility model provides a medical micromotor, including stator and rotor, the rotor is foretell micromotor rotor.
The advantageous effects of the additional features of the present invention will be explained in the detailed description of the preferred embodiments of the present description.
Drawings
Fig. 1 is a cross-sectional view of a micro-motor rotor according to a first embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at I;
FIG. 3 is an exploded schematic view of the micro-motor rotor shown in FIG. 1;
fig. 4 is a cross-sectional view of a micro-motor rotor according to a second embodiment of the present invention;
fig. 5 is a cross-sectional view of a micro-motor rotor according to a third embodiment of the present invention.
Description of reference numerals: 10. a rotor body; 12. a central bore; 20. a first shaft member; 21. an inner bore; 22. a barrel portion; 24. a first shaft head; 26. a flared part; 28. a first through hole; 30. a second shaft member; 32. a plug portion; 321. a small diameter section; 322. a large diameter section; 34. a second shaft head; 36. a second through hole; 40. an axis of rotation.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the features in the following embodiments and examples may be combined with each other without conflict.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
Fig. 1 is a cross-sectional view of a micro-motor rotor according to a first embodiment of the present invention, fig. 2 is a partially enlarged view of a portion I in fig. 1, and fig. 3 is an exploded view of the micro-motor rotor shown in fig. 1. As shown in fig. 1-3, the rotor of the micro-machine includes a rotor body 10 and a rotating shaft, the rotor body 10 is made of a permanent magnet material (such as magnetic steel), the rotor body 10 is cylindrical, and a central axis of the rotor body 10 coincides with a rotation axis 40 of the rotor of the micro-machine. The rotating shaft comprises a first shaft member 20 and a second shaft member 30 arranged coaxially with the first shaft member 20, the central axes of the first shaft member 20 and the second shaft member 30 coinciding with the rotational axis 40 of the micromotor rotor. A circular inner hole 21 is provided in the first shaft member 20, the rotor body 10 is fitted into the inner hole 21, the inner diameter of the inner hole 21 is interference-fitted with the outer diameter of the rotor body 10, and the second shaft member 30 is provided at the opening of the inner hole 21.
The utility model discloses a micromotor rotor, because the workable precision of the outer wall of rotor main body 10 is very high, set up hole 21 in the pivot, rotor main body 10 packs into the hole 21 of pivot, fixes a position the installation through the outer wall of rotor main body 10 and the inner wall of hole 21, and the coaxial precision of the cooperation of rotor main body 10 and pivot is high, and the unbalance amount of rotor is very little, and the motor operation can be more steady, and especially the advantage is more obvious on high-speed motor; moreover, the matching strength of the rotor main body 10 of the micromotor rotor and the rotating shaft mainly depends on interference fit, not mainly on glue, and the rotating shaft and the magnetic steel cannot fall off or slide due to glue failure under severe working conditions or long-term use.
In the present embodiment, the first shaft member 20 includes a cylindrical body portion 22 extending in the axial direction, the cylindrical body portion 22 is provided with an inner hole 21, the second shaft member 30 includes a plug portion 32, the plug portion 32 is inserted into the opening of the inner hole 21, and the outer diameter of the plug portion 32 is in interference fit with the inner diameter of the opening of the inner hole 21, so that the first shaft member 20 and the second shaft member 30 are coaxially connected together. In the present embodiment, one end of the rotor body 10 contacts the bottom surface of the inner bore 21, and the other end contacts the end surface of the plug portion 32. Thus, both ends of the rotor body 10 have extremely high coaxial accuracy and axial dimensional accuracy with the first shaft member 20 and the second shaft member 30.
As shown in fig. 2, it is preferable that the opening of the inner bore 21 has a flared portion 26, and the inner diameter of the flared portion 26 is greater than or equal to the outer diameter of the rotor body 10. Since the inner diameter of the flared portion 26 is equal to or larger than the outer diameter of the rotor body 10, the rotor body 10 does not expand the inner diameter of the flared portion 26 when the rotor body 10 is assembled, and the fitting accuracy of the flared portion 26 and the plug portion 32 can be ensured. Preferably, the plug portion 32 is stepped and includes a small diameter section 321 and a large diameter section 322 connected in sequence from front to back, the outer diameter of the small diameter section 321 is in interference fit with the inner diameter of the inner bore 21, and the outer diameter of the large diameter section 322 is in interference fit with the inner diameter of the flared portion 26.
As shown in fig. 3, the first shaft element 20 further includes a first shaft head 24, the first shaft head 24 extends axially outward from the end of the barrel portion 22 away from the second shaft element 30, and the outer diameter of the first shaft head 24 is smaller than the outer diameter of the barrel portion 22; the second shaft element 30 further includes a second shaft head portion 34, the first shaft head portion 24 extending axially outwardly from an end of the plug portion 32 remote from the first shaft element 20, and the second shaft head portion 34 having an outer diameter smaller than an outer diameter of the plug portion 32. The first and second spindle heads 24, 34 are primarily used to rotatably support the motor on the bracket.
Fig. 4 is a cross-sectional view of a micro-motor rotor according to a second embodiment of the present invention, as shown in fig. 4, the structure of the micro-motor rotor in this embodiment is substantially the same as that of the first embodiment, except that: the first shaft member 20 is provided with a first through hole 28 communicating with the inner hole 21, and the second shaft member 30 is provided with a second through hole 36 communicating with the inner hole 21, so that when the rotor body 10 is pressed in, air between the rotor body 10 and the inner hole 21 is exhausted through the first through hole 28, and resistance generated when air existing in the inner hole 21 presses in the rotor body 10 is avoided. Similarly, air in the inner hole 21 between the second shaft member 30 and the rotor body 10 is exhausted through the second through hole 36. Preferably, the first through hole 28 and the second through hole 36 extend in the axial direction of the rotating shaft.
Fig. 5 is a cross-sectional view of a rotor of a micro-motor according to a second embodiment of the present invention, as shown in fig. 5, the structure of the rotor of the micro-motor in this embodiment is substantially the same as that of the second embodiment, except that: the center of the rotor body 10 in this embodiment is provided with a center hole 12, and one end of the center hole 12 communicates with the first through hole 28 and the other end communicates with the second through hole 36. Thus, the central bore 12 and the first and second through- bores 28, 36 form a channel extending along the rotational axis 40, which can be used as a channel for fluids (liquids or gases) or for solids (cables or imaging devices, etc.), allowing the micro-motor rotor to be used in surgical power applications and the like.
In another embodiment of the present invention, a medical micro-motor is provided, which comprises a stator and a rotor as described above.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The utility model provides a micromotor rotor, includes cylindrical rotor main part and pivot, its characterized in that, the pivot includes primary shaft spare and the secondary shaft spare with the coaxial setting of this primary shaft spare be provided with circular hole on the primary shaft spare, rotor main part is packed into in the inner hole, just rotor main part's external diameter with the internal diameter interference fit of hole, secondary shaft spare set up in the drill way department of hole.
2. The micromotor rotor of claim 1 wherein said first shaft member comprises an axially extending barrel portion having said bore disposed therein, said second shaft member comprises a plug portion inserted into the aperture of said bore and having an outer diameter in interference fit with the inner diameter of the aperture of said bore.
3. The micromotor rotor of claim 2 wherein one end of said rotor body contacts a bottom surface of said bore and the other end contacts an end surface of said plug portion.
4. The micromotor rotor of claim 2 wherein said bore is provided with a flared section at the mouth of said bore having an inner diameter greater than the inner diameter of said bore.
5. The micro-motor rotor as recited in claim 4, wherein the plug portion is stepped and includes a small diameter section and a large diameter section sequentially connected from front to back, an outer diameter of the small diameter section being in interference fit with an inner diameter of the inner bore, and an outer diameter of the large diameter section being in interference fit with an inner diameter of the flared section.
6. The micromotor rotor of claim 2 wherein said first shaft member further comprises a first shaft head portion having an outer diameter less than an outer diameter of said barrel portion; the second shaft member further includes a second shaft head portion having an outer diameter smaller than an outer diameter of the plug portion.
7. The micromotor rotor according to any one of claims 1 to 6, wherein said first shaft member is provided with a first through hole communicating with said inner hole, and said second shaft member is provided with a second through hole communicating with said inner hole.
8. The micro-machine rotor as recited in claim 7, wherein the first through hole and the second through hole each extend in an axial direction of the shaft.
9. The micromotor rotor according to claim 8, wherein the center of said rotor body is provided with a center hole having one end communicating with said first through hole and the other end communicating with said second through hole.
10. A medical micromotor comprising a stator and a rotor, characterized in that said rotor is a micromotor rotor as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021834535.6U CN212726617U (en) | 2020-08-28 | 2020-08-28 | Micromotor rotor and medical micromotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021834535.6U CN212726617U (en) | 2020-08-28 | 2020-08-28 | Micromotor rotor and medical micromotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212726617U true CN212726617U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021834535.6U Active CN212726617U (en) | 2020-08-28 | 2020-08-28 | Micromotor rotor and medical micromotor |
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| Country | Link |
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| CN (1) | CN212726617U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116961272A (en) * | 2023-09-19 | 2023-10-27 | 苏州心岭迈德医疗科技有限公司 | Hollow cup motor with integrated shaft sleeve magnetic steel |
-
2020
- 2020-08-28 CN CN202021834535.6U patent/CN212726617U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116961272A (en) * | 2023-09-19 | 2023-10-27 | 苏州心岭迈德医疗科技有限公司 | Hollow cup motor with integrated shaft sleeve magnetic steel |
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