CN214707413U - Rotary shaft assembly, rotor assembly, motor and sweeper having the same - Google Patents
Rotary shaft assembly, rotor assembly, motor and sweeper having the same Download PDFInfo
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- CN214707413U CN214707413U CN202023242238.5U CN202023242238U CN214707413U CN 214707413 U CN214707413 U CN 214707413U CN 202023242238 U CN202023242238 U CN 202023242238U CN 214707413 U CN214707413 U CN 214707413U
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Abstract
本实用新型公开了一种转轴组件，包括：转轴；两个轴承，沿所述转轴的轴向方向套设在所述转轴上，用于支撑所述转轴；以及一套筒，其沿所述转轴的轴向方向套设在所述转轴上，且所述套筒的一端与所述两个轴承的其中一个轴承抵接，另一端与所述两个轴承的其中另一个轴承抵接；所述套筒与所述两个轴承的外径相同；其中，所述转轴与所述两个轴承配合处的外径定义为d1，所述两个轴承的外径定义为d2；其中，d1和d2之间满足：0.2＜d1/d2＜0.5。本实用新型通过在轴承和轴承之间抵接有套筒，套筒能够为其提供预紧力，降低噪音；d1和d2之间满足：0.2＜d1/d2＜0.5，以改进转轴和轴承的尺寸，减缓轴承的失效，提高电机工作效率，改善电机的性能。
The utility model discloses a rotating shaft assembly, comprising: a rotating shaft; two bearings sleeved on the rotating shaft along the axial direction of the rotating shaft to support the rotating shaft; The axial direction of the rotating shaft is sleeved on the rotating shaft, and one end of the sleeve is in contact with one of the two bearings, and the other end is in contact with the other one of the two bearings; so The outer diameter of the sleeve and the two bearings is the same; wherein, the outer diameter of the place where the rotating shaft and the two bearings cooperate is defined as d1, and the outer diameter of the two bearings is defined as d2; wherein, d1 and Between d2 satisfies: 0.2<d1/d2<0.5. In the utility model, a sleeve is abutted between the bearing and the bearing, and the sleeve can provide a pre-tightening force and reduce noise. size, slow down the failure of bearings, improve the working efficiency of the motor, and improve the performance of the motor.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a machine of sweeping the floor technical field especially relates to a pivot subassembly, rotor subassembly, motor and have its machine of sweeping the floor.
[ background of the invention ]
The sweeper drives the movable impeller to rotate through a rotating shaft on the motor so as to generate air negative pressure in the sealed shell, and accordingly dust and other impurities are sucked into a cleaning electric appliance in the sweeper. In order to make the rotating shaft rotate smoothly, a bearing is usually sleeved outside the rotating shaft. The existing bearings adopt a double-picking mode or a single-picking mode, namely a pair of bearings are sleeved on a rotating shaft, and because a motor can rotate at a high speed in work, the double-picking type bearings can generate great noise and the motor efficiency is low; and the single-cantilever bearing can bear larger stress in the rotating process of the rotating shaft due to the arrangement of only one bearing, and the bearing is easy to lose efficacy.
[ Utility model ] content
To the weak point that exists among the above-mentioned technique, the utility model provides a pivot subassembly, rotor subassembly, motor and have its machine of sweeping the floor, the pivot is rotating the in-process, and the bearing is difficult for becoming invalid, and can the noise reduction.
In order to solve the technical problem, the technical scheme adopted by the application is as follows: a spindle assembly comprising: a rotating shaft; the two bearings are sleeved on the rotating shaft along the axial direction of the rotating shaft and used for supporting the rotating shaft; the sleeve is sleeved on the rotating shaft along the axial direction of the rotating shaft, one end of the sleeve is abutted with one of the two bearings, and the other end of the sleeve is abutted with the other of the two bearings; the outer diameters of the sleeve and the two bearings are the same; wherein the outer diameter of the rotating shaft at the matching position of the rotating shaft and the two bearings is defined as d1, and the outer diameter of the two bearings is defined as d 2; wherein d1 and d2 satisfy: d1/d2 is more than 0.2 and less than 0.5.
In one embodiment of the present application, the length of the shaft is defined as L2, and the span between the two bearings is defined as L1; wherein, L1 and L2 satisfy: L1/L2 is more than 0.3 and less than 0.4
Further, the present application also provides a rotor assembly comprising: a rotating shaft; the two bearings are sleeved on the rotating shaft along the axial direction of the rotating shaft and used for supporting the rotating shaft; the sleeve is sleeved on the rotating shaft along the axial direction of the rotating shaft, and two end parts of the sleeve are respectively abutted with the two bearings; the outer diameters of the sleeve and the two bearings are the same; the movable impeller is arranged at one end part of the rotating shaft and is positioned at one side of the sleeve; the magnet is arranged on the rotating shaft and is positioned on the other side of the sleeve; wherein the outer diameter of the rotating shaft at the matching position of the two bearings is defined as d1, the outer diameter of the two bearings is defined as d2, and d1 and d2 satisfy the following conditions: d1/d2 is more than 0.2 and less than 0.5.
In an embodiment of the present application, the rotating shaft includes a first shaft portion and a second shaft portion, which are coaxially disposed, the moving impeller, the two bearings and the sleeve are disposed on the first shaft portion, and a magnet is disposed on the second shaft portion; wherein an outer diameter of the first shaft portion is larger than an outer diameter of the second shaft portion.
In an embodiment of the present application, a stepped portion is formed at a connection portion of the first shaft portion and the second shaft portion, and the magnet abuts against the stepped portion.
In an embodiment of the present application, the end of the second shaft portion is further sleeved with a balance ring configured to reduce centrifugal runout of the rotating shaft due to dynamic unbalance when the rotating shaft rotates by limiting radial movement of the rotating shaft.
In one embodiment of the present application, the balancing ring is an auxiliary bearing.
In an embodiment of the present application, the moving impeller is fastened to an end of the rotating shaft by a mounting ring.
In addition, the present application also provides a motor, comprising: a rotor assembly; the stator component is arranged around the periphery of the rotor component in a surrounding manner; and a housing for mounting the rotor assembly and the stator assembly; wherein, the rotor subassembly is above-mentioned rotor subassembly.
In addition, this application still provides a machine of sweeping floor, include the aforesaid motor.
Compared with the prior art, the application has the beneficial effects that: a sleeve is abutted between the bearing and can provide pretightening force for the sleeve, so that the noise is reduced; meanwhile, the outer diameter of the matching part of the rotating shaft and the bearing is d1, the outer diameter of the bearing is d2, and the d1 and the d2 satisfy the following conditions: d1/d2 is more than 0.2 and less than 0.5, so that the size ratio of the rotating shaft and the bearing is improved, the failure of the bearing is relieved, the working efficiency of the motor is improved, and the performance of the motor is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
fig. 1 is a schematic structural view of the rotating shaft assembly of the present invention.
Fig. 2 is an exploded schematic view of the rotor assembly of the present invention.
FIG. 3 is a schematic view of the structure of the impeller of the rotor assembly of FIG. 2.
Fig. 4 is a schematic cross-sectional view of a rotor assembly of the present invention.
Fig. 5 is an exploded schematic view of the motor of the present invention.
Fig. 6 is a schematic cross-sectional view of the motor of the present invention.
Fig. 7 is an exploded view of the housing of fig. 5.
Fig. 8 is a cross-sectional schematic view of the housing of fig. 5.
[ detailed description ] embodiments
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
As shown in fig. 1, a rotary shaft assembly 1 according to a preferred embodiment of the present invention includes: a rotating shaft 11; the two bearings 12 are sleeved on the rotating shaft 11 along the axial direction of the rotating shaft 11 and used for supporting the rotating shaft 11; the sleeve 13 is sleeved on the rotating shaft 11 along the axial direction of the rotating shaft 11, one end of the sleeve 13 is abutted with one bearing 12 of the two bearings 12, and the other end of the sleeve 13 is abutted with the other bearing 12 of the two bearings 12; the sleeve 13 has the same outer diameter as the two bearings 12; wherein, the outer diameter of the rotating shaft 11 where the two bearings 12 are matched is defined as d1, the outer diameter of the two bearings 12 is defined as d2, and d1 and d2 satisfy: d1/d2 is more than 0.2 and less than 0.5.
In the technical scheme provided by the application, the sleeve 13 can provide pretightening force for the bearing 12 and the bearing 12 by abutting the sleeve 13 between the bearing 12 and the sleeve, so that the noise is reduced; meanwhile, the outer diameter of the matching part of the rotating shaft 11 and the bearing 12 is d1, the outer diameter of the bearing 12 is d2, and the outer diameters of d1 and d2 satisfy the following conditions: d1/d2 is more than 0.2 and less than 0.5, so that the sizes of the rotating shaft 11 and the bearing 12 are improved, the failure of the bearing 12 is relieved, the working efficiency of the motor is improved, and the performance of the motor is improved.
In one embodiment, the span between the bearings 12 is defined as L1, the length of the shaft 11 is defined as L2, and the length between L1 and L2 satisfies: L1/L2 is more than 0.3 and less than 0.4. When the L1/L2 is within the above range, the noise generated when the rotating shaft 11 rotates can be further reduced, and the bearing 12 can also support the rotating shaft 11 more stably, thereby improving the stability of the motor operation.
Furthermore, referring to fig. 2 to 4, the present invention also relates to a rotor assembly 10, which comprises the aforementioned rotating shaft 11, bearing 12 and sleeve 13; a movable impeller 14 provided at one end of the rotating shaft 11 and located on one side of the sleeve 13; and a magnet 15 disposed on the shaft 11 and located at the other side of the sleeve 13.
In the present embodiment, the rotating shaft 11 is a stepped shaft. The bearing 12 is sleeved on the rotating shaft 11 with a larger outer diameter to increase the stress area of the bearing 12 and the rotating shaft 11, so that the bearing pressure of the bearing 12 is reduced, the phenomenon of abnormal sound caused by the damage of the bearing 12 is improved, and meanwhile, the service life of the motor can be prolonged.
Specifically, the rotating shaft 11 includes a first shaft portion 111 and a second shaft portion 112, the first shaft portion 111 and the second shaft portion 112 are coaxially disposed, an outer diameter of the first shaft portion 111 is larger than an outer diameter of the second shaft portion 112, and a stepped portion 113 is formed at a connection portion of the first shaft portion 111 and the second shaft portion 112. The bearing 12, the sleeve 13 and the movable impeller 14 are all sleeved on the first shaft portion 111, and the position of the bearing 12, the sleeve 13 and the movable impeller 14 can be adjusted along the axial direction of the first shaft portion 111, so that subsequent assembly is facilitated. The magnet 15 is fitted over the second shaft portion 112 and abuts against the step portion 113 to axially position the magnet 15. Indeed, in other embodiments, the rotating shaft 11 may be formed with other shaft portions having different outer diameters from the first shaft portion 111 as required to axially position the movable impeller 14, and the application is not limited herein.
The movable impeller 14 has a central insertion hole 142a through which the first shaft portion 111 passes, a mounting ring 16 is detachably connected to the movable impeller 14, the mounting ring 16 is disposed coaxially with the insertion hole 142a, and the movable impeller 14 is fastened to the end portion of the first shaft portion 111 by the mounting ring 16.
The rotor blade 14 includes an upper plate body 141, a lower plate body 142, and a plurality of rotor blades 143. The upper plate 141 is formed with an air guide hole 141a, the lower plate 142 is disposed coaxially and opposite to the upper plate 141 along an axial direction of the air guide hole 141a, and a plurality of moving blades 143 are connected between the upper plate 141 and the lower plate 142 and are disposed around the center of the upper plate 141 and/or the lower plate 142 at equal intervals on the upper plate 141 and the lower plate 142. The upper plate 141 is bent outward from the air guiding hole 141a to a direction away from the air guiding hole 141a to form an air guiding duct 1411, and the air guiding duct 1411 can guide the airflow so that the airflow can enter the movable impeller 14 more smoothly. The insertion hole 142a is opened in the center of the lower plate 142.
The mounting ring 16 is fixedly connected to the lower plate 142, and a first fastening member 17 is disposed between the mounting ring 16 and the lower plate 142 to fasten the mounting ring 16 to the lower plate 142.
The mount ring 16 includes a cylindrical sleeve portion 161 and a connecting portion 162 formed circumferentially around the sleeve portion 161. The connecting portion 162 is attached to the lower plate 142, the end of the sleeve portion 161 protrudes outward from the end face of the connecting portion 162 and is inserted into the insertion hole 142a, the connecting portion 162 can limit the axial movement of the mounting ring 16, and the sleeve portion 161 can limit the radial movement of the mounting ring 16, thereby facilitating the installation of the mounting ring 16. The first shaft portion 111 of the rotating shaft 11 is inserted into the sleeve portion 161, and is in interference fit or adhesive fit with the sleeve portion 161.
The first fastening members 17 are plural in number and are equally spaced along the circumferential direction of the connecting portion 162 of the mounting ring 16. The first fastening member 17 may be a threaded fastening member such as a bolt or a screw.
Preferably, the end of the second shaft portion 112 is sleeved with a balancing ring 18. In the present embodiment, the balance ring 18 is embodied as an auxiliary bearing, and the balance ring 18 is directly press-fitted to the end of the second shaft portion 112. By providing the balance ring 18, it is possible to limit the radial movement of the shaft 11 when the shaft 11 is rotating, to reduce the centrifugal runout of the shaft 11 due to dynamic unbalance when rotating.
Referring also to fig. 5-8, the present invention is also directed to an electric machine including a housing 20, a rotor assembly 10, and a stator assembly 30. The housing 20 is used for mounting the stator assembly 30 and the rotor assembly 10, the rotor assembly 10 is the aforementioned rotor assembly, and the stator assembly 30 is disposed on the periphery of the magnet 15 of the rotor assembly 10.
The housing 20 includes a base shell 21, a rear cover 22, and a hood 23. The base housing 21 is formed therein with a stator cavity 21a and a bearing cavity 21b communicating with each other. The stator assembly 30 is fixedly installed in the stator cavity 21a, the bearing 12 and the sleeve 13 of the rotor assembly 10 are fixedly installed in the bearing cavity 21b to support the rotor assembly 10, one end of the rotating shaft 11 penetrates through the bearing 12 and the sleeve 13 to extend into the stator cavity 21a, the magnet 15 and the balance ring 18 are contained in the stator cavity 21a, and the rear cover 22 is detachably connected to the end of the base shell 21 to close the stator cavity 21 a.
One end of the bearing cavity 21b far away from the stator cavity 21a is communicated with the outside, the other end of the rotating shaft 11 extends outwards from the bearing 12 and extends out of the base shell 21, the movable impeller 14 is located outside the base shell 21 and sleeved on the extended end, the fan cover 23 is fixed on the base shell 21 and covered outside the movable impeller 14, and the fan cover 23 is not in contact with the movable impeller 143.
An air containing cavity 23a for containing the movable impeller 14 is formed in the fan cover 23, an air inlet 23b communicated with the air containing cavity 23a is formed in the fan cover 23, and when the movable impeller 14 rotates, air flow enters the movable impeller 14 from the air inlet 23b and flows to a specified position along the movable impeller 14.
Preferably, a sealing connection exists between the air inlet 23b of the air hood 23 and the air duct 1411. Specifically, the air hood 23 includes an inner ring 231 for enclosing the air inlet 23b and an outer ring 232 connected to the inner ring 231, an annular accommodating groove 233 is formed between the inner ring 231 and the outer ring 232, a sealing ring 24 is embedded in the accommodating groove 233, and an end surface of the air duct 1411 is tightly attached to the sealing ring 24. By adopting the structure, the air quantity loss of the motor can be reduced, the suction power of the motor is improved, and the working performance is further enhanced.
In this embodiment, in order to improve the flow guiding effect, the casing 20 further includes a fixed impeller 25, and the fixed impeller 25 is connected between the base shell 21 and the fan housing 23 to guide the airflow flowing out of the movable impeller 14, so as to reduce energy loss caused by airflow disorder, reduce noise, and simultaneously enable the movable impeller 14 to generate larger suction force and air volume during operation.
The stationary impeller 25 includes an inner impeller body 251, an outer impeller body 252, and a plurality of stationary blades 253. The inner wheel 251 is fixed on the base shell 21, the wind cover 23 covers the outer wheel 252, and the plurality of fixed blades 253 are connected between the inner wheel 251 and the outer wheel 252 and are distributed at equal intervals along the circumferential direction of the inner wheel 251 and/or the outer wheel 252.
In order to facilitate the installation of the fixed impeller 25, the middle part of the inner wheel 251 is provided with an installation hole 251a, the end part of the base shell 21 is convexly formed with a cylinder part 211 matched with the installation hole 251a, the inner wheel 251 is sleeved outside the cylinder part 211 and abuts against the end part of the base shell 21 so as to limit the axial direction and the radial direction of the fixed impeller 25. The inner wheel 251 and the base housing 21 are fastened by interference fit or fastening means. In this embodiment, for easy attachment and detachment, it is preferable that the second fastening member 26 is provided between the inner race 251 and the base housing 21, and the second fastening member 26 is a threaded fastening member such as a bolt or a screw. The second fastening members 26 are plural in number and are equally spaced along the circumferential direction of the inner wheel body 251.
In a preferred embodiment, the outer wheel 252 is snap-fitted to the fan housing 23, so that the fan housing 23 can be easily removed and the movable impeller 14 and the stationary impeller 25 can be easily cleaned.
The inner contour of the contact part of the fan housing 23 and the outer wheel body 252 is the same as the outer contour of the outer wheel body 252, and the inner diameter of the contact part is slightly smaller than the outer diameter of the outer wheel body 252, so that the inner wall of the fan housing 23 is tightly attached to the outer wall of the outer wheel body 252, and airflow leakage is prevented.
Preferably, the inner wall of the fan housing 23 is formed with a protruding edge 234 protruding in the circumferential direction, and the protruding edge 234 abuts against the end surface of the outer wheel body 252, so that the protruding edge 234 can axially limit the fan housing 23 and further improve the sealing property between the fan housing 23 and the outer wheel body 252. In this embodiment, the hood 23 may be made of a plastic material with better elasticity.
Referring to fig. 2, 4 and 6, the rotor assembly 10 further includes a bearing support 19, and the bearing support 19 is disposed in the bearing cavity 21b and is enclosed outside the bearing 12 and the sleeve 13, so as to fix the bearing 12 and the sleeve 13 more firmly.
The bearing holder 19 includes a cylinder 191 and an abutment 192. The bearing 12 and the sleeve 13 are accommodated in the cylinder 191, and the bearing and the cylinder 191 may be fixed by interference fit or gluing. The abutment 192 is formed on the outer wall of the cylinder 191 so as to project in the circumferential direction of the cylinder 191, and the abutment 192 abuts against the inner wall of the bearing chamber 21 b.
Preferably, the abutting portion 192 has a tooth-shaped structure, which can reduce the contact area with the bearing cavity 21b, thereby facilitating the installation of the bearing support 19 into the bearing cavity 21 b. The number of the abutting portions 192 is plural and is uniformly distributed along the length direction of the cylinder 191 to improve the connection stability of the bearing bracket 19 and the bearing chamber 21 b.
Referring to fig. 5 and 6, the motor further includes a driving assembly 40, and the driving assembly 40 is disposed in the stator cavity 21a and electrically connected to the stator assembly 30 to supply power to the stator assembly 30, so as to drive the magnet 15 to rotate, thereby driving the rotating shaft 11 to rotate. Because drive assembly 40 sets up in stator cavity 21a, and stator cavity 21a is sealed by back lid 22, and stator cavity 21a is airtight cavity to can effectively prevent steam entering, avoid the motor to become invalid because of the steam of intaking. And because the fan housing 23 is located at the movable impeller 14, the driving assembly 40 and the fan housing 23 are respectively located at two ends of the motor, so that the driving assembly 40 is far away from the air inlet 23b, which also can reduce the possibility that the driving assembly 40 contacts with water vapor.
Furthermore, the utility model also provides a sweeper, including aforementioned motor.
In summary, the sleeve is abutted between the bearing and the bearing, and the sleeve can provide pretightening force for the bearing, so that the noise is reduced; meanwhile, the outer diameter of the matching part of the rotating shaft and the bearing is d1, the outer diameter of the bearing is d2, and the d1 and the d2 satisfy the following conditions: d1/d2 is more than 0.2 and less than 0.5, so that the sizes of the rotating shaft and the bearing are improved, the failure of the bearing is relieved, the working efficiency of the motor is improved, and the performance of the motor is improved;
the utility model discloses in, the length definition of pivot is L2, and the span definition between two bearings is L1, satisfies between L1 and the L2: 0.3 < L1/L2 < 0.4, when L1/L2 is in the numerical range, the noise generated when the rotating shaft 11 rotates can be further reduced, meanwhile, the bearing 12 can more stably support the rotating shaft 11, and the running stability of the motor is improved;
the bearing sleeve is arranged at the position where the outer diameter of the rotating shaft is larger so as to increase the stress area between the bearing and the rotating shaft, thereby reducing the bearing pressure of the bearing, further improving the phenomenon of abnormal sound caused by the damage of the bearing, and simultaneously prolonging the service life of the motor.
The above description is only for the purpose of illustrating embodiments of the present invention and is not intended to limit the scope of the present invention, and all modifications, equivalents, and equivalent structures or equivalent processes that can be used directly or indirectly in other related fields of technology shall be encompassed by the present invention.
Claims (10)
1. A spindle assembly, comprising:
a rotating shaft (11);
the two bearings (12) are sleeved on the rotating shaft (11) along the axial direction of the rotating shaft (11) and used for supporting the rotating shaft (11); and
the sleeve (13) is sleeved on the rotating shaft (11) along the axial direction of the rotating shaft (11), one end of the sleeve (13) is abutted with one bearing (12) of the two bearings (12), and the other end of the sleeve (13) is abutted with the other bearing (12) of the two bearings (12); the sleeve (13) has the same outer diameter as the two bearings (12);
wherein the outer diameter of the rotating shaft (11) at the matching position of the two bearings (12) is defined as d1, and the outer diameter of the two bearings (12) is defined as d 2;
wherein d1 and d2 satisfy: d1/d2 is more than 0.2 and less than 0.5.
2. The spindle assembly of claim 1,
the length of the rotating shaft (11) is defined as L2, and the span between the two bearings (12) is defined as L1;
wherein, L1 and L2 satisfy: L1/L2 is more than 0.3 and less than 0.4.
3. A rotor assembly, comprising:
a rotating shaft (11);
the two bearings (12) are sleeved on the rotating shaft (11) along the axial direction of the rotating shaft (11) and used for supporting the rotating shaft (11);
the sleeve (13) is sleeved on the rotating shaft (11) along the axial direction of the rotating shaft (11), one end of the sleeve (13) is abutted with one bearing (12) of the two bearings (12), and the other end of the sleeve (13) is abutted with the other bearing (12) of the two bearings (12); the sleeve (13) has the same outer diameter as the two bearings (12);
the movable impeller (14) is arranged at one end part of the rotating shaft (11) and is positioned at one side of the sleeve (13); and
the magnet (15) is arranged on the rotating shaft (11) and is positioned on the other side of the sleeve (13);
wherein the outer diameter of the rotating shaft (11) at the matching position of the two bearings (12) is defined as d1, the outer diameter of the two bearings (12) is defined as d2, and d1 and d2 satisfy the following conditions: d1/d2 is more than 0.2 and less than 0.5.
4. The rotor assembly according to claim 3, wherein the rotating shaft (11) comprises a first shaft part (111) and a second shaft part (112) which are coaxially arranged, the movable impeller (14), the two bearings (12) and the sleeve (13) are arranged on the first shaft part (111), and a magnet (15) is arranged on the second shaft part (112);
wherein an outer diameter of the first shaft portion (111) is larger than an outer diameter of the second shaft portion (112).
5. The rotor assembly according to claim 4, wherein a step (113) is formed at a junction of the first shaft portion (111) and the second shaft portion (112), and the magnet (15) abuts against the step (113).
6. The rotor assembly of claim 4, wherein the end of the second shaft portion (112) is further sleeved with a balancing ring (18), the balancing ring (18) being configured to reduce centrifugal runout of the rotating shaft (11) due to dynamic imbalance when rotating by limiting radial movement of the rotating shaft (11).
7. The rotor assembly of claim 6, wherein the balancing ring (18) is an auxiliary bearing.
8. The rotor assembly according to claim 3, characterized in that the impeller (14) is fastened on one end of the shaft (11) by a mounting ring (16).
9. An electric machine, comprising:
a rotor assembly;
the stator assembly (30) is arranged around the periphery of the rotor assembly in a surrounding mode; and
a housing (20) for mounting the rotor assembly and the stator assembly (30);
wherein the rotor assembly is as claimed in any one of claims 3 to 8.
10. A sweeper comprising the motor of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023242238.5U CN214707413U (en) | 2020-12-29 | 2020-12-29 | Rotary shaft assembly, rotor assembly, motor and sweeper having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023242238.5U CN214707413U (en) | 2020-12-29 | 2020-12-29 | Rotary shaft assembly, rotor assembly, motor and sweeper having the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214707413U true CN214707413U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023242238.5U Active CN214707413U (en) | 2020-12-29 | 2020-12-29 | Rotary shaft assembly, rotor assembly, motor and sweeper having the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214707413U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215777A (en) * | 2021-12-16 | 2022-03-22 | 广东威灵电机制造有限公司 | Rotor mechanism, electric fan and vacuum cleaner |
-
2020
- 2020-12-29 CN CN202023242238.5U patent/CN214707413U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215777A (en) * | 2021-12-16 | 2022-03-22 | 广东威灵电机制造有限公司 | Rotor mechanism, electric fan and vacuum cleaner |
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