CN215817675U - External rotor motor and stator seat thereof - Google Patents

Abstract

The utility model relates to the field of motors, in particular to an outer rotor motor and a stator seat thereof. A stator seat comprises a base, a bearing seat and a stator core; the stator core is sleeved on a shaft lever of the base and a shaft sleeve of the bearing seat, and two axial ends of the stator core sleeve are respectively abutted against the base and the bearing seat; an annular mortise is formed between the circumferential outer wall of the outer section of the shaft lever of the base and the inner wall of the stator core, the caliber of the annular mortise is gradually increased from the bottom to the opening end, and the shaft sleeve of the bearing seat is embedded into the annular mortise; the inner wall of the shaft sleeve is abutted to the inclined plane of the circumferential outer wall of the outer section of the shaft rod, and the outer wall of the shaft sleeve is abutted to the inner wall of the stator core in an interference manner. This stator seat relies on tenon fourth of twelve earthly branches extrusion locking stator core and bearing frame, and the assembly is more firm, and interference smear metal volume is littleer, and is safer.

Description

External rotor motor and stator seat thereof

Technical Field

The utility model relates to the field of motors, in particular to an outer rotor motor and a stator seat thereof.

Background

In a conventional motor, a stator is arranged outside, and a rotor rotates to generate power. The external rotor motor is the opposite structure, the stator is in the middle of the motor, and the rotor is outside. The outer rotor fan adopts an advanced structure and a reasonable pneumatic design of directly driving the impeller by the outer rotor motor, and has the characteristics of high efficiency, low noise, light weight, compact structure, convenient installation and maintenance and the like. What traditional external rotor electric machine can refer to that shown in figure 1, stator core 3 in this scheme wholly overlaps on the axostylus axostyle of locating aluminum alloy base 1, and the axle increases for the outer end of axostylus axostyle retaining ring and is used for axial to inject stator core 3, consequently need set up the retaining ring groove on the axostylus axostyle, and then leads to bearing chamber wall thickness to reduce, reduces bearing chamber intensity, easily appears bearing chamber deformation. In addition, the stator core 3 of the scheme has a long interference stroke, more aluminum chips are generated, and the aluminum chips easily fall to the bottom of the end cover, so that the stator assembly has poor voltage resistance, and the electric control plate has short circuit and other quality problems.

On this basis, like the stator seat of the current external rotor electric machine that fig. 2 shows, with whole aluminum alloy base fall into two parts in the traditional scheme, including aluminum alloy base 1 and aluminum alloy bearing frame 2, stator core 3 overlaps simultaneously in this scheme and locates on the axostylus axostyle of aluminum alloy base 1 and aluminum alloy bearing frame 2, and the cooperation precision requirement is high, leads to the stator pine to take off because size discrepancy and pressure equipment frock lead to just bad problem to cause the shovel bits problem, perhaps the bearing housing pine takes off.

Disclosure of Invention

In order to solve the above problems, a first object of the present invention is to provide a stator base that locks a stator core and a bearing seat by means of mortise and tenon extrusion, and that is more firmly assembled, has a smaller amount of interference chips, and is safer.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a stator seat comprises a base, a bearing seat and a stator core; the stator core is sleeved on a shaft lever of the base and a shaft sleeve of the bearing seat, and two axial ends of the stator core sleeve are respectively abutted against the base and the bearing seat; the method is characterized in that: an annular mortise is formed between the circumferential outer wall of the outer section of the shaft lever of the base and the inner wall of the stator core, the caliber of the annular mortise is gradually increased from the bottom to the opening end, and the shaft sleeve of the bearing seat is embedded into the annular mortise; the inner wall of the shaft sleeve is abutted to the inclined plane of the circumferential outer wall of the outer section of the shaft rod, and the outer wall of the shaft sleeve is abutted to the inner wall of the stator core in an interference manner.

The utility model adopts the technical scheme, and the technical scheme relates to a stator seat.A circular mortise is formed between the circumferential outer wall of the outer section of a base shaft lever of the stator seat and the inner wall of a stator core, and the opening caliber of the circular mortise is larger than the caliber of the bottom of the circular mortise; when the bearing is installed, the shaft sleeve of the bearing seat is embedded into the annular mortise; after the stator core is installed, the inner wall of the shaft sleeve abuts against the inclined plane of the circumferential outer wall of the outer section of the shaft rod, and the outer wall of the shaft sleeve abuts against the inner wall of the stator core in an interference mode. The shaft sleeve of the bearing seat in the scheme has the function similar to that of a tenon, and the stator iron core and the base are locked by utilizing the radial force and the axial force generated by interference extrusion of the tenon and the mortise.

Based on the structure, the stator seat has the following advantages:

1, this scheme relies on tenon fourth of twelve earthly branches extrusion locking stator core and bearing frame, compresses tightly gradually based on the inclined plane direction in the assembling process, can not lead to the stator pine to take off because of the pressure equipment frock is just bad.

2, in the process of installing the shaft sleeve of the bearing seat into the annular mortise, only after the outer wall of the shaft sleeve is contacted with the inner wall of the stator core,

interference cutting can be generated in the process of continuous press fitting, so that the interference stroke of the scheme is short, and the generation of aluminum cutting is effectively controlled.

3, the base and the bearing seat are both made of aluminum alloy (the prior art), and the structure is combined; because base and the bearing frame of aluminum alloy system are softer for stator core, at the interference fit in-process of above-mentioned record, produce deformation in axle sleeve inner wall and axostylus axostyle outer segment butt cooperation position more easily to reduce the produced interference smear metal volume of axle sleeve outer wall and stator core inner wall relatively, the production of effective control aluminium is cut.

Preferably, the stator core is further sleeved on the shaft rod inner section of the base, and the inner wall of the stator core is in transition fit with the circumferential outer wall of the shaft rod inner section. After the scheme is assembled, the axial inner side part of the stator core is sleeved on the inner section of the shaft rod, and the axial outer side part is sleeved on the shaft sleeve of the bearing seat and is in interference fit with the shaft sleeve. By adopting the mechanism, the stator core can be sleeved on the inner section of the shaft lever to be preliminarily positioned during assembly, so that subsequent interference press fitting is facilitated. It should be noted that the transition fit referred to herein is a fit manner between an interference fit and a clearance fit, that is, the designated sub-core can be easily sleeved on the inner section of the shaft rod, but will not become loose.

Preferably, when the shaft sleeve of the bearing seat completely extends into the annular mortise, a chip storage gap is formed between the end part of the shaft sleeve of the bearing seat and the shaft rod of the base.

In a further preferred scheme, the diameter of the outer end of the inner shaft rod section is larger than that of the inner end of the outer shaft rod section, so that a step surface is arranged between the inner shaft rod section and the outer shaft rod section; and a scrap storage gap is formed between the end part of the shaft sleeve of the bearing seat and the step surface. In the technical scheme, a scrap storage gap is formed between the end part of a shaft sleeve of the bearing seat and a shaft rod of the base; as described above, when the shaft sleeve of the bearing seat is embedded into the annular mortise, the interference press mounting of the outer wall of the shaft sleeve and the inner wall of the stator core can generate cutting scraps, and the cutting scraps can be contained in the scrap storage gap in a closed manner, so that the quality problems of poor pressure resistance of the stator assembly, short circuit of the electric control plate and the like caused by leakage of aluminum scraps are avoided.

Preferably, the circumferential outer wall of the outer section of the shaft rod and the inner wall of the shaft sleeve are both conical surfaces, and the inclination angle of the circumferential outer wall of the outer section of the shaft rod and the inclination angle of the inner wall of the shaft sleeve are 3-5 degrees. In the technical scheme, the circumferential outer wall of the outer section of the shaft lever is a conical surface, so that the caliber of the outer end of an annular mortise formed between the shaft lever and the inner wall of the stator core is larger than that of the inner end; the inner wall of the shaft sleeve is a conical surface, and then the inner wall of the shaft sleeve is matched with the circumferential outer wall of the outer section of the shaft rod in an inclined plane mode.

A second object of the present invention is to provide an external rotor electric machine including the stator base as described above.

Drawings

Fig. 1 is a schematic structural diagram of a conventional stator holder.

Fig. 2 is a schematic structural diagram of a conventional stator holder.

Fig. 3 is a schematic structural diagram of a stator seat according to the present invention.

Fig. 4 is an assembly schematic view of a stator seat according to the utility model.

Fig. 5 is an enlarged view of a portion a of fig. 4.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1:

as shown in fig. 3 to 5, the present embodiment relates to a stator base, which includes a base 1, a bearing seat 2 and a stator core 3. The stator core 3 is sleeved on the shaft rod of the base 1 and the shaft sleeve of the bearing seat 2, and the two axial ends of the stator core 3 are respectively abutted against the base 1 and the bearing seat 2. An annular mortise 4 is formed between the circumferential outer wall of the shaft rod outer section 11 of the base 1 and the inner wall of the stator core 3, the caliber of the annular mortise 4 is gradually increased from the bottom to the opening end, and the shaft sleeve 21 of the bearing seat 2 is embedded into the annular mortise 4. The inner wall of the shaft sleeve 21 abuts against the inclined surface of the circumferential outer wall of the outer section 11 of the shaft rod, and the outer wall of the shaft sleeve 21 abuts against the inner wall of the stator core 3 in an interference manner.

In a specific embodiment, the circumferential outer wall of the outer shaft section 11 and the inner wall of the shaft sleeve 21 are both conical surfaces, and the inclination angle of the circumferential outer wall of the outer shaft section 11 and the inner wall of the shaft sleeve 21 is 3-5 °. In the technical scheme, the circumferential outer wall of the outer section 11 of the shaft rod is a conical surface, so that the caliber of the outer end of the annular mortise 4 formed between the outer section and the inner wall of the stator core 3 is larger than that of the inner end. The inner wall of the shaft sleeve 21 is a conical surface, and is matched with the circumferential outer wall of the outer section 11 of the shaft rod in an inclined plane.

Above-mentioned technical scheme relates to a stator seat, constitutes annular tongue-and-groove 4 between the circumference outer wall of the base 1 axostylus axostyle outer section 11 of this stator seat and the inner wall of stator core 3, and the bore of opening of annular tongue-and-groove 4 is greater than the bore of its bottom. When the bearing seat is installed, the shaft sleeve 21 of the bearing seat 2 is embedded into the annular mortise 4. After the installation, the inner wall of the shaft sleeve 21 is abutted against the inclined plane of the circumferential outer wall of the outer section 11 of the shaft rod, and the outer wall of the shaft sleeve 21 is abutted against the inner wall of the stator core 3 in an interference manner. The shaft sleeve 21 of the bearing seat 2 in this scheme functions like a tenon, and the stator core 3 and the base 1 are locked by radial force and axial force generated by interference extrusion of the tenon and the mortise.

Based on the structure, the stator seat has the following advantages:

1, this scheme relies on tenon fourth of twelve earthly branches extrusion locking stator core and bearing frame 2, compresses tightly gradually based on the inclined plane direction in the assembling process, can not

Poor stator pine takes off because of pressure equipment frock leads.

2, in the process of installing the shaft sleeve 21 of the bearing seat 2 into the annular mortise 4, interference cutting is generated only after the outer wall of the shaft sleeve 21 is contacted with the inner wall of the stator core 3 and in the process of continuing press mounting, so that the interference stroke of the scheme is short, and the generation of aluminum cutting is effectively controlled.

3, the base 1 and the bearing seat 2 are made of aluminum alloy (the prior art), and the structure is combined. Because the base 1 and the bearing seat 2 made of aluminum alloy are softer relative to the stator core 3, the deformation is more easily generated at the position where the inner wall of the shaft sleeve 21 abuts against the outer section 11 of the shaft rod in the interference assembly process, so that the interference cutting amount generated by the outer wall of the shaft sleeve 21 and the inner wall of the stator core 3 is relatively reduced, and the generation of aluminum cutting is effectively controlled.

In addition, stator core 3 still cup joints on base 1's axostylus axostyle inner segment 12, and stator core 3's inner wall and the circumference outer wall transition fit of axostylus axostyle inner segment 12. After the assembly of the scheme is completed, the axial inner side part of the stator core 3 is sleeved on the shaft rod inner section 12, and the axial outer side part is sleeved on the shaft sleeve 21 of the bearing seat 2 and is in interference fit with the shaft sleeve. By adopting the mechanism, the stator core 3 can be sleeved on the shaft lever inner section 12 to be preliminarily positioned during assembly, so that subsequent interference press fitting is facilitated. It should be noted that the transition fit referred to herein is a fit between an interference fit and a clearance fit, that is, the designated sub-core 3 can be easily sleeved on the shaft rod inner section 12, but will not be loosened.

When the shaft sleeve 21 of the bearing seat 2 completely extends into the annular mortise 4, a scrap storage gap 5 is formed between the end part of the shaft sleeve 21 of the bearing seat 2 and the shaft rod of the base 1. In a further preferred scheme, the diameter of the outer end of the inner shaft section 12 is larger than that of the inner end of the outer shaft section 11, so that a step surface 13 is arranged between the inner shaft section 12 and the outer shaft section 11. And a scrap storage gap 5 is formed between the end part of the shaft sleeve 21 of the bearing seat 2 and the step surface 13. In this technical scheme, be formed with between the axostylus axostyle of axle sleeve 21 end of bearing frame 2 and base 1 and store up bits clearance 5. As described above, when the sleeve 21 of the bearing housing 2 is inserted into the annular mortise 4, the outer wall of the sleeve 21 and the inner wall of the stator core 3 are pressed in an interference manner to generate chips, and the chips are enclosed and contained in the chip storage gap 5, so that the quality problems of poor pressure resistance of the stator assembly, short circuit of the electric control board and the like caused by leakage of aluminum chips are avoided.

Example 2:

the present embodiment provides an external rotor motor including the stator base as described in embodiment 1 above.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims (7)

1. A stator seat comprises a base (1), a bearing seat (2) and a stator core (3); the stator core (3) is sleeved on a shaft rod of the base (1) and a shaft sleeve (21) of the bearing seat (2), and two axial ends of the stator core (3) sleeve are respectively abutted against the base (1) and the bearing seat (2); the method is characterized in that: an annular mortise (4) is formed between the circumferential outer wall of the shaft rod outer section (11) of the base (1) and the inner wall of the stator core (3), the caliber of the annular mortise (4) is gradually increased from the bottom to the opening end of the annular mortise, and a shaft sleeve (21) of the bearing seat (2) is embedded into the annular mortise (4); the inner wall of the shaft sleeve (21) is abutted against the inclined surface of the circumferential outer wall of the outer section (11) of the shaft rod, and the outer wall of the shaft sleeve (21) is abutted against the inner wall of the stator core (3) in an interference manner.

2. A stator seat according to claim 1, wherein: the stator core (3) is further sleeved on the shaft rod inner section (12) of the base (1), and the inner wall of the stator core (3) is in transition fit with the circumferential outer wall of the shaft rod inner section (12).

3. A stator seat according to claim 2, wherein: when the shaft sleeve (21) of the bearing seat (2) completely extends into the annular mortise (4), a scrap storage gap (5) is formed between the end part of the shaft sleeve (21) of the bearing seat (2) and the shaft rod of the base (1).

4. A stator seat according to claim 3, wherein: the diameter of the outer end of the shaft lever inner section (12) is larger than that of the inner end of the shaft lever outer section (11), so that a step surface (13) is arranged between the shaft lever inner section (12) and the shaft lever outer section (11); and a scrap storage gap (5) is formed between the end part of the shaft sleeve (21) of the bearing seat (2) and the step surface (13).

5. A stator seat according to claim 1, wherein: the circumferential outer wall of the outer section (11) of the shaft rod and the inner wall of the shaft sleeve (21) are conical surfaces.

6. The stator yoke as claimed in claim 5, wherein: the inclination angle of the circumferential outer wall of the shaft rod outer section (11) and the inner wall of the shaft sleeve (21) is 3-5 degrees.

7. An external rotor electric machine characterized in that: comprising a stator seat according to any of claims 1-6.

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