Outer rotor assembly and outer rotor motor

Abstract

The utility model provides an external rotor assembly and an external rotor motor, the external rotor assembly comprises a casing and a magnetic conductive ring plate, the magnetic conductive ring plate is fixedly arranged in the casing, the magnetic conductive ring plate is internally provided with a non-metal magnetic shoe rack, the magnetic shoe rack comprises a plurality of magnetic shoe baffle plates extending along the axial direction, magnetic steel is arranged between two adjacent magnetic shoe baffle plates, and the magnetic steel is arranged between the magnetic shoe baffle plates. The magnetic steel abuts against the magnetic conductive ring plate and abuts against the magnetic shoe baffles on the two sides of the magnetic steel, and therefore hot dry glue is not adopted for fixing the magnetic shoes any more.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, concretely relates to a kind of outer rotor assembly and outer rotor motor. BACKGROUND

[0002] In prior art, outer rotor motor rotor shell and magnetic tile need to use hot glue fastening, installation is more complex and poor precision;In addition, hot glue solidification time is long, usually 12h-24h, and long working hours. Since outer rotor motor shell is difficult to process, so the cost of general rotor shell is higher, and when motor needs to be repaired due to magnetic tile problem, the magnetic tile bonded on the outer rotor shell is difficult to disassemble, and needs to be heated to 300 DEG C or above using oven, which is time-consuming and difficult, and there is a risk of damaging the rotor shell and magnetic tile during heating.

[0003] At present, a new magnetic tile fixing scheme is needed to replace the prior art of fixing magnetic tile using hot glue. CONTENT OF UTILITY MODEL

[0004] The utility model provides a kind of outer rotor assembly and outer rotor motor, to no longer use hot glue to fix magnetic tile.

[0005] In one aspect, the utility model provides an outer rotor assembly, comprising a shell and a magnetic ring plate, the magnetic ring plate is fixedly arranged in the shell, the magnetic ring plate is provided with a non-metallic magnetic tile holder, the magnetic tile holder comprises a plurality of magnetic tile baffles extending along the axial direction, a magnetic steel is arranged between adjacent two magnetic tile baffles, the magnetic steel abuts against the magnetic ring plate, and the magnetic steel abuts against the magnetic tile baffles on both sides thereof.

[0006] In some embodiments, an annular gap is formed between the outer circumferential surface of the magnetic ring plate and the inner circumferential surface of the shell.

[0007] In some embodiments, the outer circumferential surface is provided with at least two first clamping grooves at both ends in the axial direction, the inner circumferential surface is provided with a first protrusion corresponding to each first clamping groove, and the first protrusion is arranged in the first clamping groove to limit the circumferential direction of the magnetic ring plate.

[0008] In some embodiments, a spacer sleeve is arranged on the magnetic tile baffle, and the rigidity of the spacer sleeve is less than that of the magnetic tile baffle.

[0009] In some embodiments, the shell has a first end and a second end at both ends in the axial direction, the inner surface of the first end is provided with an annular boss, the annular boss is provided with an annular table surface facing the second end, the annular table surface is provided with a baffle groove corresponding to each magnetic tile baffle, and one end of the magnetic tile baffle facing the first end is inserted into the baffle groove.

[0010] In some embodiments, an annular second slot is provided on the annular table, an annular gasket is provided in the second slot, one end of the magnetic steel facing the first end is provided in the second slot and squeezes the annular gasket, and the stiffness of the annular gasket is less than the stiffness of the annular table.

[0011] In some embodiments, a side of the annular gasket close to the axis of the housing is provided with an avoidance groove corresponding one-to-one to the baffle groove, and an end of the magnetic tile baffle facing the first end is provided with a give way groove, and the give way groove is located on the side away from the axis of the housing.

[0012] In some embodiments, the magnetic tile frame includes a fixing ring, which is arranged at one end of the magnetic tile baffle facing the second end. A second protrusion is provided on the outer peripheral surface of the fixing ring. When a first slot is provided, the second protrusion is inserted into the first slot.

[0013] In some embodiments, the outer rotor assembly further includes a retaining ring, which is disposed on the inner side of the housing and on a side of the fixing ring facing away from the magnetic tile baffle and abuts against the fixing ring.

[0014] In some embodiments, the outer circumference of the retaining ring is provided with multiple third protrusions, the inner circumference of the second end is provided with an internal thread, and the multiple third protrusions are provided with external threads adapted to the internal threads, and the retaining ring is threadedly connected to the casing.

[0015] On the other hand, the present invention also provides an outer rotor motor, comprising a stator and the outer rotor assembly.

[0016] The present application sets a magnetic ring plate and a magnetic tile frame, and the magnetic tile frame is provided with multiple magnetic tile baffles, and the magnet is set between two connected magnetic tile baffles; the magnetic tile baffles on both sides of the magnet in the circumferential direction limit the magnet in the circumferential direction, and the magnetic ring plate limits the magnet in the radial direction, and the magnetic ring plate is fixed in the casing; because when the outer rotor assembly rotates, the magnet tends to move radially outward under the action of centrifugal force, so the magnet is firmly fixed in the casing without the need to use hot-drying glue to fix the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the description of the prior art. The drawings described below are merely exemplary. For those skilled in the art, other implementation drawings can be derived from the provided drawings without inventive effort.

[0018] Figure 1It is an exploded view of the outer rotor assembly of the embodiment of the utility model;

[0019] Figure 2 It is a structure schematic view of the outer rotor assembly of the embodiment of the utility model;

[0020] Figure 3 It is an axial schematic view of the casing of the embodiment of the utility model;

[0021] Figure 4 It is an inclined view of the casing of the embodiment of the utility model;

[0022] Figure 5 It is the embodiment of the utility model; Figure 4 The enlarged view of A in the middle;

[0023] Figure 6 It is a magnetic ring plate schematic view of the embodiment of the utility model;

[0024] Figure 7 It is a magnetic shoe frame schematic view of the embodiment of the utility model;

[0025] Figure 8 It is an annular gasket of the embodiment of the utility model;

[0026] Figure 9 It is a baffle schematic view of the embodiment of the utility model;

[0027] The reference signs are:

[0028] 1, casing; 101, first clamping groove; 102, second clamping groove; 103, baffle groove; 104, annular boss; 2, magnetic shoe frame; 201, magnetic shoe baffle; 2011, give way slot; 202, fixed ring; 3, magnetic ring plate; 4, magnetic steel; 5, annular interval; 601, first protrusion; 602, second protrusion; 603, third protrusion; 7, annular gasket; 701, avoiding slot; 8, baffle ring. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. The description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0030] In the description of the utility model, it needs to be understood that the orientation words such as '' front, back, up, down, left, right '' '' horizontal, vertical, perpendicular, horizontal '' and '' top, bottom '' and the like indicated orientation or positional relationship usually is based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, under the condition of not making opposite statement, these orientation words do not indicate and imply that the device or element indicated must have a particular orientation or be constructed and operated in a particular orientation, therefore can not be understood as the limitation of the protection scope of the utility model;The orientation words '' inside, outside '' refer to the inside and outside relative to the contour of each component.

[0031] For the convenience of description, spatial relative terms such as '' above '' '' above '' '' upper surface '' '' upper '' and the like can be used herein to describe the spatial position relationship of one device or feature with other devices or features as shown in the drawing.It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawing.For example, if the device in the drawing is inverted, the device described as '' above '' or '' above '' other devices or structures will be positioned '' below '' or '' below '' other devices or structures.Exemplary terms '' above '' can include both '' above '' and '' below '' orientations.The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.

[0032] In addition, it should be noted that the use of '' first '' '' second '' and the like to limit parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore can not be understood as the limitation of the protection scope of the utility model.

[0033] For reference Figures 1-9 As shown in the drawing, an outer rotor assembly, including a shell 1 and a magnetic ring plate 3, the magnetic ring plate 3 is fixedly arranged in the shell 1, the magnetic ring plate 3 is provided with non-metallic magnetic tile frame 2, the magnetic tile frame 2 includes a plurality of magnetic tile baffle 201 extending along the axial direction, two adjacent magnetic tile baffle 201 between magnetic steel 4, the magnetic steel 4 and the magnetic ring plate 3 abut, the magnetic steel 4 and the magnetic tile baffle 201 on both sides of itself abut.

[0034] The '' axial '' '' circumferential '' and '' radial '' of the application are all referenced to the magnetic ring plate 3.

[0035] The present application sets a magnetic ring plate 3 and a magnetic tile frame 2, and the magnetic tile frame 2 sets multiple magnetic tile baffles 201, and sets the magnet 4 between two connected magnetic tile baffles 201; the magnetic tile baffles 201 on both sides of the magnet 4 in the circumferential direction limit the magnet 4 in the circumferential direction, and the magnetic ring plate 3 limits the magnet 4 in the radial direction; because when the outer rotor assembly rotates, the magnet 4 will have a tendency to move radially outward under the action of centrifugal force, so that the magnet 4 is firmly fixed in the casing 1. Compared with the prior art, the present application does not need to use hot-drying glue to fix the magnet 4, but instead uses a mechanical structure to limit and fix the magnet 4. First, there is no hot-drying glue solidification process, which simplifies the production process and improves production efficiency; second, in later maintenance, there is no need to heat the magnetic tiles, which saves time and avoids heat damage to the magnet 4 and the casing 1, reducing the scrap rate of the magnet 4 and the casing 1; third, the mechanical structure fixes the magnet 4, which improves the accuracy of the fixation of the magnet 4; fifth, the temperature of the motor will increase when it is working. Since hot-drying glue is no longer used, the motor can work stably in a higher temperature range, which improves the applicability of the motor using the outer rotor assembly; sixth, when part of the magnet 4 needs to be replaced, it is only necessary to disassemble the damaged part of the magnet 4 and replace it, which reduces the cost.

[0036] The magnetic conductive ring plate 3 can reduce magnetic resistance, improve the torque characteristics of the motor, reduce the noise of the motor, and improve the anti-interference ability of the motor, thereby improving the efficiency and stability of the motor.

[0037] Preferably, Figure 2 As shown, an annular gap 5 is formed between the outer circumference of the magnetic conductive ring plate 3 and the inner circumference of the housing 1 .

[0038] The annular spacer 5 is beneficial to air flow, which helps to reduce the temperature of the outer rotor and increase the service life and working stability of the outer rotor.

[0039] Preferably, Figures 3-5 As shown, at least two first slots 101 are provided at both ends of the outer circumferential surface in the axial direction, and at both ends of the inner circumferential surface in the axial direction are provided with first protrusions 601 corresponding to the first slots 101 one by one, and the first protrusions 601 are provided in the first slots 101 to limit the magnetic ring plate 3 in the circumferential direction.

[0040] During assembly, the magnetic conductive ring plate 3 is inserted into the housing 1 from one end thereof, so that the first protrusion 601 is locked into the first locking groove 101, thereby fixing the magnetic conductive ring plate 3 and improving assembly efficiency.

[0041] The first protrusion 601 is inserted into the first groove, ensuring that the magnetic ring plate 3 can transmit kinetic energy to the housing 1 .

[0042] Furthermore, the first protrusion 601 and the first groove are interference fit, thereby improving assembly accuracy.

[0043] There are multiple first slots 101 , which are evenly distributed along the circumferential direction.

[0044] Preferably, a spacer is provided on the magnetic tile baffle 201 , and the rigidity of the spacer is smaller than the rigidity of the magnetic tile baffle 201 .

[0045] The stiffness of the spacer is smaller than that of the magnetic tile baffle 201, which can avoid the phenomenon of damage to the magnetic steel 4 caused by compression between the magnetic steel 4 and the magnetic tile baffle 201; the spacer can produce deformation, thereby causing the magnetic steel 4 to be tightly squeezed between two adjacent magnetic tile baffles 201, thereby improving the firmness of the fixation of the magnetic steel 4 and avoiding noise caused by vibration of the magnetic tile.

[0046] Preferably, Figures 3-5 As shown, the two ends of the housing 1 in the axial direction are respectively a first end and a second end, the inner surface of the first end is provided with an annular boss 104, the annular boss 104 is provided with an annular table surface facing the second end, the annular table surface is provided with a baffle groove 103 corresponding to the magnetic tile baffle 201 one by one, and the end of the magnetic tile baffle 201 facing the first end is inserted into the baffle groove 103.

[0047] By providing baffle grooves 103, the magnetic tile baffle 201 can be precisely fixed in the circumferential direction, improving the stability and accuracy of the fixation of the magnet 4 within the housing 1. The annular table provides axial positioning for the magnet 4. Because the magnetic tile baffle 201 needs to be inserted into the baffle grooves 103, the axial length of the magnetic tile must be greater than the length of the magnet 4.

[0048] Furthermore, the integrated design and production of the annular boss 104 and the housing 1 is conducive to improving the coaxiality of the housing 1 and the annular boss 104, thereby improving the coaxiality of the magnet 4 and the housing 1, and reducing the vibration noise generated by the uneven gravity distribution of the magnet 4 when the outer rotor assembly rotates at high speed.

[0049] Preferably, Figures 3-5 As shown, an annular second slot 102 is provided on the annular table, an annular gasket 7 is provided in the second slot 102, and one end of the magnetic steel 4 facing the first end is provided in the second slot 102 and squeezes the annular gasket 7, and the stiffness of the annular gasket 7 is less than the stiffness of the annular table.

[0050] By the ring-shaped gasket 7, when the magnetic steel 4 is installed, the local extrusion force between the magnetic steel 4 and the ring-shaped platform is reduced, the stability of the acting force between the magnetic steel 4 and the ring-shaped platform is improved, and the integrity of the magnetic steel 4 is ensured; the ring-shaped gasket 7 is extruded to generate a certain deformation, so that the magnetic steel 4 is tightly extruded in the axial direction, and vibration and noise of the magnetic steel 4 are avoided.

[0051] Since a part of the magnetic steel 4 extends into the second clamping groove 102, the second clamping groove 102 can limit the magnetic steel 4 in the radial direction.

[0052] Preferably, as shown in Figure 1 and Figure 8 , the ring-shaped gasket 7 is provided with an avoidance groove 701 corresponding to the baffle groove 103 on the side close to the axis of the shell 1, and the magnetic tile baffle 201 is provided with a let-in groove 2011 on one end facing the first end, and the let-in groove 2011 is located on the side away from the axis of the shell 1.

[0053] By providing the avoidance groove 701 on the side of the ring-shaped gasket 7 close to the axis of the shell 1, when the magnetic tile holder 2 is arranged in the shell 1, the magnetic tile baffle 201 is inserted into the avoidance groove 701 and the magnetic tile groove, and the let-in groove 2011 is arranged to let in the ring-shaped gasket 7. Through the above arrangement, the magnetic tile baffle 201 can be inserted into the magnetic tile groove, and the integrity of the ring-shaped gasket 7 is ensured.

[0054] Preferably, as shown in Figure 7 , the magnetic tile holder 2 comprises a fixing ring 202, the fixing ring 202 is arranged on one end of the magnetic tile baffle 201 facing the second end, and the outer circumferential surface of the fixing ring 202 is provided with a second protrusion 602, when the first clamping groove 101 is arranged, the second protrusion 602 is clamped into the first clamping groove 101.

[0055] The fixing ring 202 fixes all the magnetic tile baffles 201 together, and also limits the magnetic tiles in the axial direction; by arranging the second protrusion 602 on the fixing ring 202, the second protrusion 602 is clamped into the first clamping groove 101, and the circumferential limiting of the magnetic tile holder 2 is realized.

[0056] Specifically, in the circumferential direction, the magnetic steel 4 is limited by the two adjacent magnetic tile baffles 201, in the axial direction, the magnetic steel 4 is limited by the fixing ring 202 and the ring-shaped protrusion, and in the radial direction, the magnetic steel 4 is limited by the magnetic ring plate 3.

[0057] Further, the magnetic shoe baffle 201 extends along the axial direction and the radial direction, in the projection of the axial direction, two adjacent magnetic shoe baffles 201 form a V-shaped type, and the opening of the V-shaped type faces the radial outside, the magnetic steel 4 is attached to the magnetic shoe baffle 201 on both sides in the circumferential direction, and the magnetic steel 4 is also limited in the radial direction by the magnetic shoe baffle 201, so that the magnetic steel 4 is completely limited.

[0058] Preferably, as shown in the drawings, Figure 9 As shown, the outer rotor assembly further comprises a baffle ring 8, the baffle ring 8 is arranged on the inner side of the shell 1, the baffle ring 8 is arranged on the side of the fixed ring 202 away from the magnetic shoe baffle 201 and abuts against the fixed ring 202.

[0059] By abutting the baffle ring 8 against the fixed ring 202, the axial limitation of the magnetic shoe holder 2 is realized, so that the magnetic shoe holder 2 can be stably fixed in the shell 1.

[0060] Preferably, as shown in the drawings, Figure 9 The outer circumferential surface of the baffle ring 8 is provided with a plurality of third protrusions 603, the inner circumferential surface of the second end is provided with an internal thread, the plurality of third protrusions 603 are provided with external threads matched with the internal thread, and the baffle ring 8 is threadedly connected with the shell 1.

[0061] By arranging the third protrusions 603 on the outer circumferential surface of the baffle ring 8, arranging the internal thread on the third protrusions 603, and arranging the internal thread on the inner circumferential surface, the baffle ring 8 is threadedly connected with the shell 1; due to the arrangement of the third protrusions 603, an air passage is formed between two adjacent third protrusions 603, the annular space 5 is connected with the outside through the air passage, so as to accelerate the gas flow in the annular space 5, which is beneficial to ensure that the temperature of the magnetic steel 4 is within a reasonable range.

[0062] In order to facilitate the installation of the baffle ring 8, four recesses can be arranged on the baffle ring 8, the four recesses form a cross, and the cross tool can rotate the baffle ring 8.

[0063] When assembling the outer rotor assembly: first, the magnetic ring plate 3 is hot-fitted with the shell 1, so that the first protrusions 601 on the magnetic ring plate 3 are clamped into the first recesses in the shell 1 and are in interference fit, avoiding loosening. Second, the annular gasket 7 is placed on the annular platform. The spacer (the spacer can be a heat shrink tube) is placed in the magnetic shoe holder 2 and is heat shrunk. Third, after the magnetic steel 4 is installed and fixed on the magnetic shoe holder 2, the whole is inserted into the magnetic ring plate 3, and the magnetic shoe baffle 201 is inserted into the baffle groove 103 on the annular platform, and the second protrusions 602 on the fixed ring 202 are clamped into the first recesses in interference. Fourth, the baffle ring 8 is used to tighten the magnetic shoe holder 2 (the fixed ring 202), and the tightening is stopped when the elasticity of the annular gasket 7 is appropriate.

[0064] The utility model also provides a kind of outer rotor motor, including stator and the outer rotor subassembly of described.

[0065] The outer rotor motor further comprises a rotating shaft, the first end of the casing 1 is provided with a bearing seat, the bearing seat is provided with an oil bearing chamber, a bearing is arranged in the bearing chamber, and the rotating shaft passes through the bearing.

[0066] Those skilled in the art can easily understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0067] The above is only the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model. The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled person in the art, without departing from the technical principle of the utility model, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. An outer rotor assembly comprising a housing (1) and a magnetically permeable ring plate (3), characterized in that, The magnetic conductive ring plate (3) is fixedly arranged in the shell (1), the magnetic conductive ring plate (3) is provided with a non-metal magnetic tile frame (2), the magnetic tile frame (2) comprises a plurality of magnetic tile baffles (201) extending along the axial direction, a magnetic steel (4) is arranged between adjacent two magnetic tile baffles (201), the magnetic steel (4) is in abutment with the magnetic conductive ring plate (3), and the magnetic steel (4) is in abutment with the magnetic tile baffles (201) on both sides of the magnetic steel (4).

2. The outer rotor assembly of claim 1, wherein An annular gap (5) is formed between the outer circumferential surface of the magnetic conductive ring plate (3) and the inner circumferential surface of the shell (1).

3. The outer rotor assembly of claim 2, wherein, At least two first clamping grooves (101) are arranged at both ends of the outer circumferential surface in the axial direction, and the inner circumferential surface is provided with a first protrusion (601) corresponding to the first clamping groove (101) at both ends in the axial direction, and the first protrusion (601) is arranged in the first clamping groove (101) to limit the magnetic conductive ring plate (3) in the circumferential direction.

4. The rotor assembly of claim 1, wherein A non-magnetic conductive spacer is sleeved on the magnetic tile baffle (201), and the rigidity of the spacer is less than that of the magnetic tile baffle (201).

5. Outer rotor assembly according to any of claims 1-4, characterized in that The shell (1) is provided with a first end and a second end at both ends in the axial direction, the inner surface of the first end is provided with an annular boss (104), the annular boss (104) is provided with an annular table surface facing the second end, the annular table surface is provided with a baffle groove (103) corresponding to the magnetic tile baffle (201), and one end of the magnetic tile baffle (201) facing the first end is inserted into the baffle groove (103).

6. The outer rotor assembly of claim 5, wherein, An annular second clamping groove (102) is arranged on the annular table surface, a non-magnetic conductive annular gasket (7) is arranged in the second clamping groove (102), one end of the magnetic steel (4) facing the first end is arranged in the second clamping groove (102) and presses the annular gasket (7), and the rigidity of the annular gasket (7) is less than that of the annular table surface.

7. The outer rotor assembly of claim 6, wherein, The annular gasket (7) is provided with an avoidance groove (701) corresponding to the baffle groove (103) on the side close to the axis of the shell (1), and the magnetic tile baffle (201) is provided with a clearance groove (2011) on one end facing the first end, and the clearance groove (2011) is located on the side away from the axis of the shell (1).

8. The outer rotor assembly of claim 7, wherein, The magnetic tile frame (2) comprises a fixing ring (202), the fixing ring (202) is arranged on one end of the magnetic tile baffle (201) facing the second end, and the outer circumferential surface of the fixing ring (202) is provided with a second protrusion (602), when the first clamping groove (101) is arranged, the second protrusion (602) is clamped into the first clamping groove (101).

9. The outer rotor assembly of claim 8, wherein, The outer rotor assembly further comprises a stop ring (8), the stop ring (8) is arranged on the inner side of the shell (1), the stop ring (8) is arranged on the side of the fixing ring (202) away from the magnetic tile baffle (201) and is in abutment with the fixing ring (202).

10. The outer rotor assembly of claim 9, wherein, The outer circumferential surface of the blocking ring (8) is provided with a plurality of third protrusions (603), the inner circumferential surface of the second end is provided with an internal thread, and the plurality of third protrusions (603) are provided with external threads matched with the internal thread, so that the blocking ring (8) is threadedly connected with the shell (1).

11. An external rotor electric machine characterized by The electric motor comprises a stator and an outer rotor assembly according to any one of claims 1-10.

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