Structure and method for fixing stator in shell

Abstract

The invention discloses a fixing structure of a stator in a shell, which comprises a volute, a rotor sleeve, a shell assembly, a screw, a stator assembly and a fixing ring, and is characterized in that the screw is rotationally connected in a through hole formed in the volute; according to the invention, the main body shell is used as a support, and the volute and the rotor sleeve are fixed on the main body shell through the screws, so that the axial displacement of the rotor sleeve is limited, and the axial displacement of the stator assembly is limited through the combined action of the rotor sleeve, the fixing ring and the main body shell; the platform is matched with the first boss to prevent the middle stator from rotating in the main body shell around the axis; a grounding piece on the main body shell is inserted into the second groove to realize a grounding function of the middle stator, and the third boss is inserted into the shell groove to limit the middle stator to rotate around the axis in the main body shell; the R grooves are matched with the ribs to limit the rotation of the middle stator in the main body shell around the axis, the stator fixing structure is simple, the production efficiency is improved, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of fixing structures of a brushless motor stator in a housing, and in particular to a fixing structure of a stator in a housing. Background Art

[0002] Brushless motors are widely used in industries such as automobiles and home appliances. The stator is an important component of brushless motors, and the fixing structure of the stator in the housing will affect the reliability of the product and the manufacturing cost. A firmly fixed stator can significantly reduce the vibration generated when the motor is running, which not only helps to reduce the noise level, but also prevents parts from loosening or being damaged due to vibration. A good fixing method increases the rigidity of the entire motor structure, allowing the motor to work stably under higher loads and harsher working conditions. A fixed stator can better protect the winding coils and their connecting lines from external factors such as physical impact or chemical corrosion. By bringing the stator into close contact with the motor housing or other cooling elements, heat can be effectively transferred to help maintain the motor temperature within a safe range and extend its life. However, the common brushless motor stator fixing methods on the market currently have obvious defects: the stator fixing structure is too complicated, resulting in low production efficiency and high manufacturing cost. Therefore, it is necessary to design a stator fixing structure in the housing. Summary of the invention

[0003] The object of the present invention is to provide a fixing structure of a stator in a housing, so as to solve the defects that the existing stator fixing structure is too complicated, resulting in low production efficiency and high manufacturing cost.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a fixing structure of a stator in a housing, comprising a volute, a rotor sleeve, a housing assembly, a screw, a stator assembly and a fixing ring, wherein a connecting screw is rotated in a through hole opened in the volute, the screw passes through the through hole opened in the rotor sleeve, the bottom of the screw is fixedly connected to a main housing in the housing assembly, a second boss is fixedly connected inside the main housing, and the second boss is fixedly connected to a lower insulating sleeve in the stator assembly.

[0005] As a further technical solution of the present invention, the shell assembly consists of a shell groove, a mounting ear, a first boss, a rib, a second boss, a grounding plate and a main shell, the mounting ear, the first boss, the rib and the grounding plate are fixedly connected in the main shell, and a shell groove is opened on the main shell.

[0006] As a further technical solution of the present invention, the stator assembly consists of a middle stator, an upper insulating sleeve, a lower insulating sleeve, a second groove, a platform, a third boss and an R groove, the upper insulating sleeve is fixedly connected to the top of the middle stator, and the lower insulating sleeve is fixedly connected to the bottom of the middle stator.

[0007] As a further technical solution of the present invention, the third boss and the platform are symmetrically and fixedly connected inside the middle stator, and the platform is cooperatively connected to the first boss.

[0008] As a further technical solution of the present invention, a second groove is formed on the third boss, a grounding plate is sleeved in the second groove, and the third boss cooperates with and connects to the housing groove.

[0009] As a further technical solution of the present invention, an R groove is provided in the second groove, and a rib is sleeved in the R groove.

[0010] As a further technical solution of the present invention, the top of the upper insulating sleeve is in close contact with the fixing ring, and the top of the fixing ring is in close contact with the rotor sleeve.

[0011] The present invention provides a fixing structure of a stator in a shell, which has the advantages that: by using the main shell as a support, the volute and the rotor sleeve are fixed to the main shell by screws, thereby limiting the axial displacement of the rotor sleeve, and limiting the axial displacement of the stator assembly by the joint action of the rotor sleeve, the fixing ring and the main shell; the fixing ring is made of rubber material, and the characteristics of the rubber material being deformed under stress are utilized to eliminate the manufacturing errors and interference fit problems of various parts, so that the end faces of the volute, the rotor sleeve and the main shell can fit tightly; the platform cooperates with the first boss to prevent the middle stator from rotating around the axis in the main shell; the grounding plate on the main shell is inserted into the second groove to realize the stator grounding function, and the third boss is inserted into the shell groove to further limit the rotation of the middle stator around the axis in the main shell; the R groove cooperates with the rib, and the two cooperate to further limit the rotation of the middle stator around the axis in the main shell; the stator fixing structure is simple, which is conducive to improving production efficiency and reducing manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is the overall structure diagram of the present invention; Figure 2 It is an overall cross-sectional view of the present invention; Figure 3 is a cross-sectional view of a stator assembly of the present invention; Figure 4 is a top view of the housing assembly of the present invention; Figure 5 It is a top view of the stator assembly of the present invention.

[0014] In the figure: 1, volute; 2, rotor sleeve; 3, housing assembly; 4, screw; 5, stator assembly; 6, fixing ring; 301, housing groove; 302, mounting ear; 303, first boss; 304, rib; 305, second boss; 306, grounding plate; 307, main housing; 501, middle stator; 502, upper insulating sleeve; 503, lower insulating sleeve; 504, second groove; 505, platform; 506, third boss; 507, R groove. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] Please see attached Figure 1 -Attached Figure 5, an embodiment of the present invention: a fixing structure of a stator in a housing, comprising a volute 1, a rotor sleeve 2, a housing assembly 3, a screw 4, a stator assembly 5 and a fixing ring 6, the screw 4 is rotatably connected in the through hole opened in the volute 1, the screw 4 passes through the through hole opened in the rotor sleeve 2, the bottom of the screw 4 is fixedly connected to the main housing 307 in the housing assembly 3, the second boss 305 is fixedly connected inside the main housing 307, and the second boss 305 is fixedly connected with the lower insulating sleeve 503 in the stator assembly 5; the housing assembly 3 is composed of a housing groove 301, a mounting ear 302, a first boss 303, a rib 304, a second boss 305, a grounding plate 306 and a main housing 307, the main housing 307 is fixedly connected with the mounting ear 302, the first boss 303, the rib 304 and the grounding plate 306, and the main housing 307 is provided with a housing groove 301; the stator assembly 5 is composed of a middle stator 501, an upper insulating sleeve 502, The middle stator 501 is composed of a lower insulating sleeve 503, a second groove 504, a platform 505, a third boss 506 and an R groove 507. The upper insulating sleeve 502 is fixedly connected to the top of the middle stator 501, and the lower insulating sleeve 503 is fixedly connected to the bottom of the middle stator 501; the third boss 506 and the platform 505 are symmetrically fixedly connected inside the middle stator 501, and the platform 505 is matched with the first boss 303; the third boss 506 is provided with a second groove 504, and the second groove 504 is fixedly connected to the bottom of the middle stator 501; A grounding plate 306 is sleeved in the middle, and the third boss 506 is connected to the housing groove 301; an R groove 507 is opened in the second groove 504, and the R groove 507 is sleeved with a rib 304. The rib 304 and the R groove 507 are connected to limit the rotation of the middle stator 501 around the axis in the main housing 307; the top of the upper insulating sleeve 502 is tightly against the fixing ring 6, and the top of the fixing ring 6 is tightly against the rotor sleeve 2. The fixing ring 6 eliminates the manufacturing errors and interference fit problems of various parts.

[0018] Specifically, when in use, firstly, the main body shell 307 is used as a support, and the volute 1 and the rotor sleeve 2 are fixed to the main body shell 307 by screws 4, thereby limiting the axial displacement of the rotor sleeve 2, and the axial displacement of the stator assembly 5 is limited by the rotor sleeve 2, the fixing ring 6 and the main body shell 307. The fixing ring 6 is made of rubber material, and the characteristics of rubber material being deformed under stress are utilized to eliminate the manufacturing errors and interference fit problems of various parts, so that the volute 1, the rotor sleeve 2 and the end faces of the main body shell 307 can fit closely; the platform 505 is connected to the first convex The platform 303 cooperates to prevent the middle stator 501 from rotating around the axis in the main shell 307; the grounding plate 306 on the main shell 307 is inserted into the second groove 504 to realize the stator grounding function, and the third boss 506 is inserted into the shell groove 301 to further limit the rotation of the middle stator 501 around the axis in the main shell 307; the R groove 507 cooperates with the rib 304, and the two cooperate to further limit the rotation of the middle stator 501 around the axis in the main shell 307. The stator fixing structure is simple, which is conducive to improving production efficiency and reducing manufacturing costs.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A structure for fixing a stator in a housing, comprising a volute (1), a rotor sleeve (2), a housing assembly (3), screws (4), a stator assembly (5) and a fixing ring (6), characterized in that: A connecting screw (4) is rotated in a through hole provided in the volute (1), the screw (4) passes through a through hole provided in the rotor sleeve (2), the bottom of the screw (4) is fixedly connected to a main housing (307) in the housing assembly (3), the interior of the main housing (307) is fixedly connected to a second boss (305), and the second boss (305) is fixedly connected to a lower insulating sleeve (503) in the stator assembly (5).

2. The fixing structure of a stator in a housing according to claim 1, characterized in that: The housing assembly (3) is composed of a housing groove (301), a mounting ear (302), a first boss (303), a rib (304), a second boss (305), a grounding sheet (306), and a main housing (307); the mounting ear (302), the first boss (303), the rib (304), and the grounding sheet (306) are fixedly connected in the main housing (307); and the housing groove (301) is provided on the main housing (307).

3. The fixing structure of a stator in a housing according to claim 1, characterized in that: The stator assembly (5) is composed of a middle stator (501), an upper insulating sleeve (502), a lower insulating sleeve (503), a second groove (504), a platform (505), a third boss (506) and an R groove (507); the upper insulating sleeve (502) is fixedly connected to the top of the middle stator (501), and the lower insulating sleeve (503) is fixedly connected to the bottom of the middle stator (501).

4. The fixing structure of the stator in the housing according to claim 3, characterized in that: The third boss (506) and the platform (505) are symmetrically and fixedly connected inside the middle stator (501), and the platform (505) is cooperatively connected to the first boss (303).

5. The fixing structure of the stator in the housing according to claim 4, characterized in that: The third boss (506) is provided with a second groove (504), a grounding plate (306) is sleeved in the second groove (504), and the third boss (506) is cooperatively connected to the housing groove (301).

6. The fixing structure of the stator in the housing according to claim 5, characterized in that: An R groove (507) is provided in the second groove (504), and a rib (304) is sleeved on the R groove (507).

7. The fixing structure of a stator in a housing according to claim 3, characterized in that: The top of the upper insulating sleeve (502) is in close contact with the fixing ring (6), and the top of the fixing ring (6) is in close contact with the rotor sleeve (2).

8. A method for fixing a stator in a housing according to claim 7, characterized in that: First, the main body shell (307) is used as a support, and the volute (1) and the rotor sleeve (2) are fixed to the main body shell (307) by screws (4), thereby limiting the axial displacement of the rotor sleeve (2). The axial displacement of the stator assembly (5) is limited by the rotor sleeve (2), the fixing ring (6) and the main body shell (307). The fixing ring (6) is made of rubber material, and the characteristics of rubber material deforming under stress are utilized to eliminate the manufacturing errors and interference fit problems of various parts, so that the end faces of the volute (1), the rotor sleeve (2) and the main body shell (307) can fit tightly; The platform (505) cooperates with the first boss (303) to prevent the middle stator (501) from rotating around the axis in the main shell (307); the grounding plate (306) on the main shell (307) is inserted into the second groove (504) to realize the stator grounding function, and the third boss (506) is inserted into the shell groove (301) to further limit the middle stator (501) from rotating around the axis in the main shell (307); the R groove (507) cooperates with the rib (304), and the two cooperate to further limit the middle stator (501) from rotating around the axis in the main shell (307).

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