CN113446302A - Shafting structure, biax motor, fan and domestic appliance - Google Patents

Shafting structure, biax motor, fan and domestic appliance Download PDF

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Publication number
CN113446302A
CN113446302A CN202110730811.7A CN202110730811A CN113446302A CN 113446302 A CN113446302 A CN 113446302A CN 202110730811 A CN202110730811 A CN 202110730811A CN 113446302 A CN113446302 A CN 113446302A
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CN
China
Prior art keywords
bearing
rotating shaft
shaft
motor
rotor
Prior art date
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Pending
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CN202110730811.7A
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Chinese (zh)
Inventor
李萍
闫甜甜
武谷雨
江记凯
胡义明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Welling Motor Technology Shanghai Co Ltd
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Midea Welling Motor Technology Shanghai Co Ltd
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Application filed by Midea Welling Motor Technology Shanghai Co Ltd filed Critical Midea Welling Motor Technology Shanghai Co Ltd
Priority to CN202110730811.7A priority Critical patent/CN113446302A/en
Priority to PCT/CN2021/119566 priority patent/WO2023272967A1/en
Publication of CN113446302A publication Critical patent/CN113446302A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C3/00—Shafts; Axles; Cranks; Eccentrics
    • F16C3/02—Shafts; Axles
    • F16C3/023—Shafts; Axles made of several parts, e.g. by welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention provides a shafting structure, a double-shaft motor, a fan and a household appliance, which comprises a first rotating shaft, a second rotating shaft and a bearing assembly, wherein the second rotating shaft is arranged in a hollow manner, the second rotating shaft is sleeved on the periphery of the first rotating shaft, the front end of the first rotating shaft extends out of the front end of the second rotating shaft, and the rear end of the first rotating shaft is positioned behind the rear end of the second rotating shaft; the bearing assembly comprises a first bearing, a second bearing and a third bearing, wherein the first bearing is sleeved at the periphery of the first rotating shaft, the second rotating shaft is sleeved at the periphery of the second rotating shaft, and the third bearing is arranged at the front end of the second bearing and is located between the first rotating shaft and the second rotating shaft. The invention has the remarkable advantages of compact structure, strong practical functionality, stable support, convenient installation, small axial size, low manufacturing cost and the like.

Description

Shafting structure, biax motor, fan and domestic appliance
Technical Field
The invention relates to the technical field of motors, in particular to a shafting structure, a double-shaft motor, a fan and a household appliance.
Background
With the continuous improvement of the life quality demand, the motor is also put forward higher requirements, such as the motor has two coaxial same-side mutually independent output capacities, smaller volume and lower cost. At present, the universal motor on the market still has an output shaft, the double-shaft of both ends with fast output, the double-shaft of same end output, wherein the double-shaft motor of both ends with fast output only has one section more from the axle of opposite side output for single output shaft already, the shafting support mode that the double-shaft motor of same end output adopted still adopts two bearing supports at every axle, the axial space that this kind of support mode needs is big, and support stability is relatively poor.
Disclosure of Invention
The invention provides a shafting structure, aiming at reducing the volume of a motor.
In order to achieve the above object, the present invention provides a shafting structure, including:
a first rotating shaft;
the second rotating shaft is arranged in a hollow manner, the second rotating shaft is sleeved on the periphery of the first rotating shaft, the front end of the first rotating shaft extends out of the front end of the second rotating shaft, and the rear end of the first rotating shaft is positioned behind the rear end of the second rotating shaft;
bearing assembly, including first bearing, second bearing and third bearing, first bearing cover is established the periphery of first pivot, the second pivot cover is established the periphery of second bearing, the third bearing sets up in the front end of second bearing, and be located first pivot with between the second pivot.
In an embodiment, the shafting structure further includes a shaft sleeve, and the shaft sleeve is sleeved on the peripheries of the first bearing and the second bearing.
In an embodiment, the first rotating shaft is a stepped shaft, the first rotating shaft has a first high-order shaft section and a first low-order shaft section, the first high-order shaft section is adjacent to the first low-order shaft section, the second rotating shaft is sleeved on the outer periphery of the first low-order shaft section, and the sleeved position of the first bearing corresponding to the first high-order shaft section is flush with the sleeved position of the second bearing corresponding to the second rotating shaft.
In an embodiment, the shafting structure further includes a reinforcing bearing, the reinforcing bearing is disposed between the first rotating shaft and the shaft sleeve, and the reinforcing bearing is spaced from the first bearing.
In an embodiment, the shafting structure further comprises a reinforcing bearing, the reinforcing bearing is sleeved on the first rotating shaft, the periphery of the reinforcing bearing is used for connecting the shaft sleeve, a stator of the motor or a rear end cover of the motor, and the reinforcing bearing and the first bearing are respectively arranged on two sides of the rotor connecting part of the first rotating shaft.
In an embodiment, the shafting structure further includes a reinforcing bearing, the reinforcing bearing is disposed between the second rotating shaft and the shaft sleeve, and the reinforcing bearing is spaced from the second bearing.
In an embodiment, the shafting structure further comprises a reinforcing bearing, the reinforcing bearing is sleeved on the second rotating shaft, the periphery of the reinforcing bearing is used for connecting the shaft sleeve, a stator of the motor or a rear end cover of the motor, and the reinforcing bearing and the second bearing are respectively arranged on two sides of the rotor connecting part of the second rotating shaft.
The invention also provides a double-shaft motor, which comprises a shaft system structure, wherein the shaft system structure comprises:
a first rotating shaft;
the second rotating shaft is arranged in a hollow manner, the second rotating shaft is sleeved on the periphery of the first rotating shaft, the front end of the first rotating shaft extends out of the front end of the second rotating shaft, and the rear end of the first rotating shaft is positioned behind the rear end of the second rotating shaft;
bearing assembly, including first bearing, second bearing and third bearing, first bearing cover is established the periphery of first pivot, the second pivot cover is established the periphery of second pivot, the third bearing sets up in the front end of second bearing, and is located first pivot with between the second pivot.
In an embodiment, the shafting structure further comprises a stator assembly and a rotor assembly, the stator assembly is provided with a rotating shaft hole and a first rotor groove and a second rotor groove which are positioned on the periphery side of the rotating shaft hole, and the first rotor groove and the second rotor groove are spaced in the axial direction of the rotating shaft hole; the rotor assembly includes a first rotor mounted to the first rotor slot and a second rotor mounted to the second rotor slot; the shafting structure is arranged in the rotating shaft hole, the first rotor is connected with the first rotating shaft, and the second rotor is connected with the second rotating shaft.
In an embodiment, a first winding and a second winding which are independent of each other are arranged in the stator assembly, the first winding is arranged corresponding to the first rotor, and the second winding is arranged corresponding to the second rotor.
In an embodiment, the first winding and the second winding are disposed between the first rotor slot and the second rotor slot.
The invention also provides a fan, comprising a double-shaft motor, wherein the double-shaft motor comprises a shaft system structure, and the shaft system structure comprises:
a first rotating shaft;
the second rotating shaft is arranged in a hollow manner, the second rotating shaft is sleeved on the periphery of the first rotating shaft, the front end of the first rotating shaft extends out of the front end of the second rotating shaft, and the rear end of the first rotating shaft is positioned behind the rear end of the second rotating shaft;
bearing assembly, including first bearing, second bearing and third bearing, first bearing cover is established the periphery of first pivot, the second pivot cover is established the periphery of second pivot, the third bearing sets up in the front end of second bearing, and is located first pivot with between the second pivot.
The invention also provides a household appliance, which comprises a fan, wherein the fan comprises a double-shaft motor, the double-shaft motor comprises a shaft system structure, and the shaft system structure comprises:
a first rotating shaft;
the second rotating shaft is arranged in a hollow manner, the second rotating shaft is sleeved on the periphery of the first rotating shaft, the front end of the first rotating shaft extends out of the front end of the second rotating shaft, and the rear end of the first rotating shaft is positioned behind the rear end of the second rotating shaft;
bearing assembly, including first bearing, second bearing and third bearing, first bearing cover is established the periphery of first pivot, the second pivot cover is established the periphery of second pivot, the third bearing sets up in the front end of second bearing, and is located first pivot with between the second pivot.
Compared with the existing five bearings, the invention only has three bearings arranged in the motor, and one bearing is arranged outside the motor main body, namely the free end of the first rotating shaft and between the first rotating shaft and the second rotating shaft, thereby the bearings in the motor main body are not excessively arranged, and the running stability of the motor can be ensured. Compared with the conventional five-bearing shafting structure, the five-bearing shafting structure has the remarkable advantages of compact structure, strong practical functionality, stable support, convenience in installation, small axial size, low manufacturing cost and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of a shafting structure according to the present invention;
FIG. 2 is an assembly view of the first shaft and the second shaft of the shafting arrangement of FIG. 1;
FIG. 3 is a schematic view of a dual-shaft motor with the shafting structure of FIG. 1;
FIG. 4 is a schematic structural view of the bushing of FIG. 3;
FIG. 5 is a schematic structural diagram of another embodiment of a shafting structure according to the present invention;
FIG. 6 is a schematic view of a dual-shaft motor with the shafting structure of FIG. 5;
FIG. 7 is a schematic structural diagram of a shafting structure according to another embodiment of the present invention;
FIG. 8 is a schematic view of a dual-shaft motor with the shafting structure of FIG. 7;
FIG. 9 is a schematic structural diagram of a shafting structure according to yet another embodiment of the present invention;
FIG. 10 is an assembly view of the first shaft and the second shaft of FIG. 9;
FIG. 11 is a schematic structural view of the first shaft shown in FIG. 10;
fig. 12 is a schematic structural view of a two-shaft motor equipped with the shafting structure of fig. 9.
The reference numbers illustrate:
Figure BDA0003137279560000041
Figure BDA0003137279560000051
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. 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 invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The motor generally includes a stator, a rotor and a rotating shaft, the rotor is connected to the rotating shaft, and when the motor is powered on, the rotor can drive the rotating shaft to rotate. For a double-shaft motor with the same output end, two sets of rotors are arranged in the double-shaft motor, the rotating shaft is also of a double-shaft structure sleeved inside and outside, one set of the two sets of rotors is connected with one rotating shaft, and the other set of the two sets of rotors is connected with the other rotating shaft. In order to keep the stability of the rotation of the two rotating shafts, a plurality of bearings are further arranged in the double-shaft motor, and the plurality of bearings are more than four bearings, namely, two bearings are sleeved on each rotating shaft, so that the stability of the rotation of the double shafts can be ensured. However, although the four bearings are sleeved together to ensure the operation of the two shafts, the stability of the two shafts is not good during the operation of the motor. In order to make such biaxial stability higher, it is currently adopted to continue to add a bearing to one of the rotating shafts. Therefore, it is necessary to provide five rotating shafts in the motor main body, however, five bearings occupy a large space inside the motor, especially an axial space of the motor, and thus an axial size of the motor must be made large.
In order to solve the problem, the invention provides a shaft system structure, a double-shaft motor comprising the shaft system structure, a fan provided with the double-shaft motor, and a household appliance provided with the fan.
Specifically, referring to fig. 1, the shafting structure 10 includes a first rotating shaft 10a, a second rotating shaft 10b and a bearing assembly 10 c. Wherein the second rotating shaft 10b is arranged in a hollow manner, i.e. a hollow shaft, and the second bearing 10c2The periphery of first pivot 10a is located to the cover, the front end of first pivot 10a by the front end of second pivot 10b stretches out, the rear end of first pivot 10a is located the rear of the rear end of second pivot 10b (that is to say, the axial length of second pivot 10b is less than the axial length of first pivot 10a, and the middle part at first pivot 10a is roughly established in the cover of second pivot 10 b). The bearing assembly 10c includes a first bearing 10c1And a second bearing 10c2And a third bearing 10c3Said first bearing 10c1The second bearing 10c is sleeved on the periphery of the first rotating shaft 10a2The periphery of the second rotating shaft 10b is sleeved with the third bearing 10c3Is provided at the second bearing 10c2And is located between the first rotating shaft 10a and the second rotating shaft 10 b.
Referring to fig. 3, for a dual shaft motor having such a shaft assembly structure 10, in addition to the shaft assembly structure 10, the dual shaft motor further includes a stator assembly 20a and a rotor assembly 20b, where the stator assembly 20a has a rotating shaft hole (not shown) and a first rotor groove 20a located on the periphery of the rotating shaft hole1And a second rotor groove 20a2Said first rotor slot 20a1And the second rotor groove 20a2The rotating shaft holes are spaced in the axial direction. The rotor assembly 20b includes a first rotor 20b1And a second rotor 20b2The first rotor 20b1Is mounted to the first rotor groove 20a1Said second rotor20b2Is mounted to the second rotor groove 20a2. The shafting structure 10 is arranged in the rotating shaft hole, and the first rotor 20b1Connecting the first rotating shaft 10a and the second rotor 20b2The second rotating shaft 10b is connected; the first bearing 10c1And a second bearing 10c2Is fixed to the stator assembly 20a (either directly or indirectly).
Referring to fig. 1 to 3, the first shaft 10a has a first rotor connecting portion 101 (for connecting the first rotor 20 b)1As a power input section), a first power output section 102 (for connecting to a member to be driven, such as a fan blade or a gear), a first rotation support section (for connecting to the first bearing 10 c)1). The second rotating shaft 10b is a hollow shaft, the second rotating shaft 10b is sleeved outside the first rotating shaft 10a, and the second rotating shaft 10b is disposed between the first rotor connecting portion 101 and the first power output section 102. The second rotating shaft 10b has a second rotor connecting portion 111 (for connecting the second rotor 20 b)2As a power input section), a second power output section 112 (for connecting to a member to be driven, such as a connecting fan blade or a gear), a second rotation support section (for connecting to the second bearing 10 c)2). The two bearings are respectively and correspondingly sleeved on the first rotary supporting section and the second rotary supporting section, and are respectively and correspondingly arranged between the two rotating shafts and the static fixed part (the static fixed part can be a stator, a motor end cover or other structures which are fixed in the motor main body and cannot move), and one bearing is arranged between the first rotating shaft 10a and the second rotating shaft 10b (the third bearing 10 c)3Is connected to the inner wall of the second rotating shaft 10b, and a third bearing 10c3Is connected to the outer wall of the first rotating shaft 10 a), i.e., between the hollow shaft and the solid shaft.
Here, the first and second rotating shafts 10a and 10b each have a rotor connecting portion and a power output section, and can realize mutually independent input and output of two powers. The first rotor connecting portion 101 and the first power output section 102 are disposed at two axial ends of the first rotating shaft 10a, and the second rotating shaft 10b is radially and coaxially sleeved outside the second rotating shaft 10b and axially disposed between the first rotor connecting portion 101 and the first power output section 102. The second rotor connecting part 111 and the second power output section 112 are spaced in the axial direction of the second rotating shaft 10b, and the second power output section 112 and the first power output section 102 output in the same axial side, so that the function of outputting in the same axial side and the same axial side is realized, the spatial layout of the shafting is rationalized, and the structure of the shafting is more compact.
And the three bearings are arranged on the rotating support sections of the first rotating shaft 10a and the second rotating shaft 10b in a matching manner to realize the rotating support of the first rotating shaft 10a and the second rotating shaft 10 b. First bearing 10c1A second bearing 10c radially arranged between the first rotating shaft 10a and the stationary member2And is radially arranged between the second rotating shaft 10b and the static piece, so that the first rotating shaft 10a and the second rotating shaft 10b can form stable two-point rotating support relative to the static piece. The third bearing is radially arranged between the first rotating shaft 10a and the second rotating shaft 10b, so that each rotating shaft forms a stable two-point rotating support, and the structural arrangement ensures that only two bearings which need to be supported on the static fixed part are needed, thereby reducing the axial distance of the needed static fixed part or increasing the axial span of the two bearings which are supported on the static fixed part under the condition that the axial distance of the static fixed part is limited, and further increasing the supporting rigidity of a shafting.
Compared with the existing five bearings, the invention only has three bearings arranged in the motor, and one bearing is arranged outside the motor body, namely the free end of the first rotating shaft 10a and between the first rotating shaft 10a and the second rotating shaft 10b, so that the bearings in the motor body are not excessively arranged, and the running stability of the motor can be ensured. Compared with the conventional five-bearing shafting structure 10, the five-bearing shafting structure has the remarkable advantages of compact structure, strong practical functionality, stable support, convenience in installation, small axial size, low manufacturing cost and the like.
In one embodiment, consider the first bearing 10c1And a second bearing 10c2Extremely easy to rotate, the first bearing 10c is installed1And a second bearing 10c2There are two ways to fix the bearing (first bearing 10 c) in the shaft hole1And a second bearing 10c2) The bearing is in interference fit with the rotating shaft, and the bearing and the rotating shaft are both rigid parts, and the mounting position of the bearing in the rotating shaft hole is deeperTherefore, if an interference fit is adopted, it is necessary to cause difficulty in assembly. Second, a fixing structure is provided in the rotary shaft hole to separately fix the first bearing 10c1And a second bearing 10c2Fixing is performed, however, due to the first bearing 10c1And a second bearing 10c2The circumferential area is relatively small, and even if a fixing structure is provided in the rotation shaft hole, it is difficult to connect the first bearing 10c1And a second bearing 10c2And (4) matching. Obviously, both of the above-mentioned ways are not favorable for fixing the bearing. In view of this, in the present embodiment, referring to fig. 1, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9 and fig. 12, the shaft structure 10 further includes a shaft sleeve 10d, and the shaft sleeve 10d is sleeved on the first bearing 10c1And the second bearing 10c2The outer periphery of (a). On the one hand, the circumferential dimension of the sleeve 10d is large, the circumferential surface area is also large, and the friction force between the sleeve 10d and the inner wall of the rotating shaft hole is larger under the same pressure. Therefore, the sleeve 10d does not need to be assembled too tightly with the inner wall of the rotating shaft hole, and a large friction force can be generated, thereby facilitating the installation of the rotating shaft. On the other hand, the sleeve 10d is more easily fixed in the shaft hole than the two bearings.
Since the first rotating shaft 10a is to be engaged with the first rotor 20b1Connected to the second rotary shaft 10b to be connected to the second rotor 20b2In order to ensure better coaxiality of the first rotating shaft 10a and the second rotating shaft 10b, the outer diameters of the first rotating shaft 10a and the second rotating shaft 10b are preferably kept consistent after the first rotating shaft 10a and the second rotating shaft 10b are assembled, so that requirements on the structures of the first rotating shaft 10a and the second rotating shaft 10b are required, namely the first rotating shaft 10a is required to be arranged as a stepped shaft. In the present embodiment, referring to fig. 1, fig. 2, fig. 5, fig. 7, fig. 9, fig. 10 and fig. 11, the first rotating shaft 10a has a first high-order shaft section 10a2And a first low-order shaft section 10a1First higher order shaft segment 10a2And a first low-order shaft section 10a1Adjacently, the second rotating shaft 10b is sleeved on the first low-order shaft section 10a1The first bearing 10c corresponding to the first high-stage shaft segment 10a11And the second bearing 10c corresponding to the second rotating shaft 10b2The sleeving positions are parallel and level.
For the first bearing 10c1And a second bearing 10c2The inner diameters of the two are the same, and the outer diameters of the two may be the same or different. For the embodiment with the same outer diameter, the specifications of the bearings are consistent, and the assembly is indirect and rapid. In addition, the shaft sleeve 10d can also be arranged in a straight cylinder shape, the structure of the shaft sleeve 10d is relatively simple, the manufacturing cost is low, the efficiency is high, and the rotation speed is high.
For embodiments in which the diameters are different, it is preferred that the first bearing 10c be formed as a single bearing1Is smaller than the second bearing 10c2Of the outer diameter of (a). The reason is as follows: if the first bearing 10c1Is larger than the second bearing 10c2The diameter of the portion of the shaft sleeve 10d corresponding to the first rotating shaft 10a is relatively large, so that the shaft system structure 10 must be installed from the rear to the front, but the front end of the shaft system structure 10 protrudes out of the motor body more, and if the shaft system structure is assembled from the rear to the front, the assembly efficiency is affected. Therefore, the first bearing 10c1Need to be smaller than the second bearing 10c2Of the outer diameter of (a).
In addition, the first bearing 10c1And a second bearing 10c2Also prevents them from sliding within the sleeve 10 d. Referring to fig. 4, in order to prevent the sleeve 10d from sliding in the spindle hole, the sleeve 10d may be stepped, and the spindle hole may be stepped to fit the sleeve 10 d.
I.e., the first bearing 10c1Is smaller than the second bearing 10c2External diameter, axle sleeve 10d be step form setting, the pivot hole sets up to the step form with axle sleeve 10d adaptation can reach many-sided beneficial effect: one can improve the assembly efficiency of the shafting and the other can prevent the first bearing 10c1And a second bearing 10c2The sleeve 10d slides relatively in the shaft hole, and the three can prevent the sleeve 10d from sliding in the shaft hole.
For the reinforcement of the shafting structure 10 in the above-mentioned embodiment, in an embodiment, the shafting structure 10 further includes a reinforced bearing 10c4Said reinforced bearing 10c4Is arranged on the first rotating shaft 10a and the shaftBetween the sleeves 10d, the reinforced bearing 10c4And the first bearing 10c1Spaced apart.
Here, the bearing 10c is reinforced4And a first bearing 10c1And therefore, the two can form a stable two-point rotation support. In this way, the first rotating shaft 10a is supported at three positions (two bearings and the first rotor connecting portion 101) in the biaxial motor main body, so that the stability of the first rotating shaft 10a in the motor main body is high. And because a third bearing 10c is arranged between the first rotating shaft 10a and the second rotating shaft 10b3Therefore, two positions (one bearing and the second rotor connecting portion 111) are provided at which the second rotating shaft 10b is supported in the twin-shaft motor main body, and an external third bearing 10c is added3And thus the stability of the second rotating shaft 10b is also high.
Due to the third bearing 10c3The first rotating shaft 10a and the second rotating shaft 10b are directly related, so the stability of the first rotating shaft 10a and the second rotating shaft 10b is closely related, and the higher the stability of one rotating shaft is, the stability of the other rotating shaft is also promoted.
For the reinforced bearing 10c4The mounting position of the mounting device will be further explained in the following embodiments.
For the reinforced bearing 10c4Position of (2), in the previous embodiment, the reinforced bearing 10c4And a first bearing 10c1Are all located on the same side of the first rotor connecting portion 101, although this is also relatively stable, the bearing 10c is after all strengthened4And a first bearing 10c1Both rotating, a first shaft 10a and a reinforced bearing 10c4The connection relationship with the first rotating shaft 10a is inferior in stability to the connection of the first rotor 20b1 with the first rotating shaft 10 a. Unlike the previous embodiment, in order to make the balance of the first rotating shaft 10a better, in the present embodiment, please refer to fig. 1 and fig. 7, the reinforced bearing 10c4Sleeved on the first rotating shaft 10a, and the reinforced bearing 10c4And the first bearing 10c1Are provided on both sides of the rotor connecting portion (first rotor connecting portion 101) of the first rotating shaft 10 a.
To say thatIs to reinforce the bearing 10c4Is connected to (directly or indirectly fixed to) the stationary member. For example, the two-shaft motor further includes a rear end cap 20d1Rear end cap 20d1Fixed to the stator, rear end cap 20d1Is provided with a holding reinforcing bearing 10c4The bearing groove of (1), the reinforced bearing 10c4Disposed at the rear end cap 20d1And the first rotation shaft 10 a. Reinforced bearing 10c4Disposed at the rear end cap 20d1Rear end cap 20d1Bearing grooves may or may not be provided, and in addition, the bearing grooves may protrude rearward in the axial direction of the first rotating shaft 10a, so that, referring to fig. 3, the inner size of the main body of the dual shaft motor (rear end cap 20 d) may be reduced to some extent1Except) to the biax motor structural stability is better simultaneously, the inside size of motor main part also can not increase. In addition, in this embodiment, the diameter of the rear end of the first rotating shaft 10 can be made small, and the reinforcing bearing 10c is sleeved on the rear end of the first rotating shaft 10a correspondingly4May be made correspondingly small (i.e. to strengthen the bearing 10 c)4Is less than the diameter of first pivot 10 a) to the little bearing can reduce the eccentricity, improves the precision, and the great bearing can improve the steadiness, and the two cooperates the back, no matter in the steadiness or on the precision, the effect is all preferred.
Referring to fig. 5 and 9, the reinforced bearing 10c4Not only can be sleeved on the first rotating shaft 10a, but also can be sleeved on the second rotating shaft 10 b. In one embodiment, the reinforced bearing 10c4A reinforced bearing 10c arranged between the second rotating shaft 10b and the shaft sleeve 10d4And the second bearing 10c2Spaced apart.
Due to the reinforced bearing 10c4And a second bearing 10c2And therefore, the two parts can also form stable two-point rotation support. In this way, since there are three positions (two bearings and the second rotor connecting portion 111) at which the second rotating shaft 10b is supported in the biaxial motor main body, the stability of the second rotating shaft 10b in the motor main body is high. And because a third bearing 10c is arranged between the first rotating shaft 10a and the second rotating shaft 10b3Thus, the first shaft 10a is biaxialTwo of the positions supported in the motor body (one bearing and the first rotor connection 101) are provided, plus an external third bearing 10c3And therefore, the stability of the first rotating shaft 10a is also high.
Of course, in the case of ensuring that the axial dimension of the biaxial motor is not too large, the reinforcing bearing 10c may be appropriately adjusted4And a second bearing 10c2The distance between the first and second shafts 10b is relatively increased, which further increases the stability of the rotation of the second shaft 10 b.
For the reinforced bearing 10c4Position of (2), in the previous embodiment, the reinforced bearing 10c4And a second bearing 10c2Are all located on the same side of the second rotor connecting portion 111, although this is also relatively stable, the bearing 10c is after all strengthened4And a second bearing 10c2Both rotating, a second shaft 10b and a reinforced bearing 10c4The connection relationship with the second rotating shaft 10b is inferior to that of the second rotor 20b in stability2And is connected to the second rotating shaft 10 b.
Unlike the previous embodiment, in the present embodiment, referring to fig. 5 and 6, the reinforced bearing 10c4Sleeved on the second rotating shaft 10b, and the reinforced bearing 10c4And the second bearing 10c2And are respectively provided on both sides of a rotor connecting portion (first rotor connecting portion 101) of the second rotating shaft 10 b. Thus, the second shaft 10b is more balanced.
It should be noted that the reinforced bearing 10c4Is connected to (directly or indirectly fixed to) the stationary member. For example, the two-shaft motor further includes a front cover 20d2Front end cap 20d2Fixed to the stator, front end cap 20d2Is provided with a holding reinforcing bearing 10c4The bearing groove of (1), the reinforced bearing 10c4Disposed at the rear end cap 20d1And the first rotation shaft 10 a. And a front end cap 20d2Similarly, front end cap 20d2The bearing groove can be arranged or not arranged on the upper part. In order to make the structural stability of the shaft system better, the bearing groove may be protruded forward in the axial direction of the first rotating shaft 10a, so that the structural stability of the dual-shaft motor is better while the bearing groove is protruded forwardThe inner size of the motor main body is not increased (see fig. 6).
Referring to fig. 3, 6, 8 and 12, the present invention further provides a dual spindle motor, which further includes a stator assembly 20a, a rotor assembly 20b and two end caps, wherein the stator assembly 20a has a rotation axis hole and a first rotor slot 20a located around the rotation axis hole1And a second rotor groove 20a2Said first rotor slot 20a1And the second rotor groove 20a2The rotating shaft holes are spaced in the axial direction; the rotor assembly 20b includes a first rotor 20b1And a second rotor 20b2The first rotor 20b1Is mounted to the first rotor groove 20a1The second rotor 20b2Is mounted to the second rotor groove 20a2(ii) a The shafting structure 10 is arranged in the rotating shaft hole, and the first rotor 20b1Connecting the first rotating shaft 10a and the second rotor 20b2Is connected with the second rotating shaft 10 b. The two end covers are respectively fixedly connected to the outermost sides of the stator assembly 20a in the axial direction, the shaft sleeve 10d is fixedly connected in a rotating shaft hole of the stator assembly 20a, a bearing chamber for accommodating a bearing is arranged in the shaft sleeve 10d, and a structure for fixing the bearing is arranged in the bearing chamber.
A first winding and a second winding (with respect to the two windings, not labeled in the figure) independent from each other are disposed in the stator assembly 20a, and the first winding corresponds to the first rotor 20b1Arranged such that said second winding corresponds to said second rotor 20b2And (4) setting. And, the first winding and the second winding are disposed in the first rotor slot 20a1And a second rotor groove 20a2In the meantime. The device is provided with two mutually independent windings which can form axial magnetic flux; the two rotor assemblies 20b are disk rotors having an axial electromagnetic force. The rotor assembly 20b is provided as a disc assembly and the first and second windings are provided in the first rotor slots 20a1And a second rotor groove 20a2Thereby, the radial dimension of the biaxial motor main body can be reduced.
For a two-shaft motor with small volume, more fans are favored, which can be used in household appliances, for example, as a component of an electric fan, an air conditioner, a dehumidifier or a humidifier.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (11)

1. A shafting structure, comprising:
a first rotating shaft;
the second rotating shaft is arranged in a hollow manner, the second rotating shaft is sleeved on the periphery of the first rotating shaft, the front end of the first rotating shaft extends out of the front end of the second rotating shaft, and the rear end of the first rotating shaft is positioned behind the rear end of the second rotating shaft;
bearing assembly, including first bearing, second bearing and third bearing, first bearing cover is established the periphery of first pivot, the second pivot cover is established the periphery of second bearing, the third bearing sets up in the front end of second bearing, and be located first pivot with between the second pivot.
2. The shafting structure of claim 1, further comprising a bushing disposed about the outer periphery of the first bearing and the second bearing.
3. The shafting structure according to claim 2, wherein the first shaft is a stepped shaft, the first shaft has a first high-stage shaft section and a first low-stage shaft section, the first high-stage shaft section is adjacent to the first low-stage shaft section, the second shaft is sleeved on the outer periphery of the first low-stage shaft section, and a sleeved position of the first bearing corresponding to the first high-stage shaft section is flush with a sleeved position of the second shaft corresponding to the second bearing.
4. The shafting structure of claim 2, further comprising a reinforcing bearing disposed between said first shaft and said shaft housing, said reinforcing bearing being spaced from said first bearing.
5. The shafting structure according to claim 2, further comprising a reinforcing bearing, wherein the reinforcing bearing is sleeved on the first rotating shaft, the outer periphery of the reinforcing bearing is used for connecting the shaft sleeve, the stator of the motor or the rear end cover of the motor, and the reinforcing bearing and the first bearing are respectively arranged on two sides of the rotor connecting portion of the first rotating shaft.
6. The shafting structure of claim 2, further comprising a reinforcing bearing disposed between said second shaft and said shaft housing, said reinforcing bearing spaced from said second bearing.
7. The shafting structure according to claim 2, further comprising a reinforcing bearing, wherein the reinforcing bearing is sleeved on the second rotating shaft, the periphery of the reinforcing bearing is used for connecting the shaft sleeve, the stator of the motor or the front end cover of the motor, and the reinforcing bearing and the second bearing are respectively arranged on two sides of the rotor connecting portion of the second rotating shaft.
8. A twin-shaft motor comprising a shaft system structure according to any one of claims 1 to 7.
9. The dual-shaft motor according to claim 8, further comprising a stator assembly and a rotor assembly, wherein the stator assembly has first and second windings disposed therein that are independent of each other, the first and second windings being disposed between the first and second rotor slots.
10. A fan comprising a dual-shaft motor according to claim 9.
11. A household appliance comprising a blower as claimed in claim 10.
CN202110730811.7A 2021-06-29 2021-06-29 Shafting structure, biax motor, fan and domestic appliance Pending CN113446302A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202110730811.7A CN113446302A (en) 2021-06-29 2021-06-29 Shafting structure, biax motor, fan and domestic appliance
PCT/CN2021/119566 WO2023272967A1 (en) 2021-06-29 2021-09-22 Shaft system structure, dual-shaft motor, fan and household appliance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110730811.7A CN113446302A (en) 2021-06-29 2021-06-29 Shafting structure, biax motor, fan and domestic appliance

Publications (1)

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CN113446302A true CN113446302A (en) 2021-09-28

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Publication number Priority date Publication date Assignee Title
JPH01177847A (en) * 1987-12-28 1989-07-14 Nec Corp Biaxial driving motor
JPH0670518A (en) * 1991-08-12 1994-03-11 Shiroo Uchida Concentric multiaxial mechanism motor
CN112503007A (en) * 2019-09-16 2021-03-16 广东美的环境电器制造有限公司 Air supply device and household appliance
CN210129795U (en) * 2019-09-16 2020-03-06 广东美的环境电器制造有限公司 Motor assembly and air supply device
CN110556989A (en) * 2019-10-22 2019-12-10 青岛厚德新能源科技开发有限公司 Double-rotor disc type permanent magnet generator
CN110912365A (en) * 2019-11-29 2020-03-24 广东美的制冷设备有限公司 Motor, fan and air conditioner
CN112389189B (en) * 2020-11-02 2022-04-22 浙江旺得福车业有限公司 Hub motor for unmanned vehicle
CN112260503A (en) * 2020-11-25 2021-01-22 南通大任永磁电机制造有限公司 Combined type concentric dual-port dual-output motor
CN113300557A (en) * 2021-06-29 2021-08-24 美的威灵电机技术（上海）有限公司 Motor, fan and domestic appliance

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