A high coaxiality motor stator structure that is easy to install

Abstract

The present invention discloses a high coaxiality motor stator structure that is easy to install, comprising: a casing, a stator core assembly and a bracket, the stator core assembly is clamped in the casing, the stator core assembly comprises a stator core, a first stator frame and a second stator frame, a connecting block is arranged on the inner side wall of the casing, a frame boss corresponding to the connecting block is arranged on the second stator frame, the frame boss comprises convex blocks symmetrically arranged on both sides of the connecting block, an arc-shaped arched portion is also arranged on the end face of the second stator frame, the arc-shaped arched portion is arranged on one side of the connecting block, a connecting arm corresponding to the connecting block is arranged on the bracket, the connecting arm is fixedly installed on the connecting block by a fastening bolt, the fastening bolt is passed through the stator core assembly, and the bottom of the connecting arm is against the arc-shaped arched portion. Compared with the prior art, the present invention has the advantages that the stator core assembly can be smoothly installed into the casing, the coaxiality is stable and easy to control after assembly, and the stator core assembly does not need to be fixed with screws.

Description

Technical Field

[0001] The invention belongs to the field of motor stator installation, and in particular relates to a high-coaxiality motor stator structure which is easy to install. Background Art

[0002] The brushless DC motor consists of a permanent magnet rotor, a multi-pole winding stator, a position sensor, etc. The stator of the brushless motor includes a stator core, an insulating frame wrapped on the surface of the stator core, and a stator winding wound on the insulating frame.

[0003] In the existing motor structure, the coaxiality of the stator and the housing during assembly is difficult to control, the stator cannot be installed smoothly, and screws are required to fix the stator, which makes installation inconvenient and the positioning effect is poor. Summary of the invention

[0004] The purpose of the present invention is to provide a high coaxiality motor stator structure that is easy to install. The stator core assembly can be smoothly installed into the casing, and the coaxiality is stable and easy to control after assembly. The stator core assembly does not need to be fixed with screws, the installation structure is simplified, and the bracket positioning is more reliable.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-coaxiality motor stator structure that is easy to install, comprising: a casing, a stator core assembly and a bracket, the stator core assembly is clamped in the casing, the stator core assembly comprises a stator core, a first stator frame and a second stator frame, the stator core is clamped on the first stator frame, the second stator frame is clamped on the first stator frame, a plurality of connecting blocks arranged equidistantly in the circumferential direction are arranged on the inner side wall of the casing, a skeleton boss corresponding to the position of the connecting block is arranged on the second stator frame, the skeleton boss comprises protrusions symmetrically arranged on both sides of the connecting block, an arc-shaped arch portion is also arranged on the end face of the second stator frame, the arc-shaped arch portion is arranged on one side of the connecting block, a connecting arm corresponding to the position of the connecting block is arranged on the bracket, the connecting arm is fixedly installed on the connecting block by a fastening bolt, the fastening bolt is passed through the stator core assembly, and the bottom of the connecting arm is against the arc-shaped arch portion.

[0006] As a further description of the above technical solution:

[0007] A flat surface is arranged on the top of the arc-shaped arched portion.

[0008] As a further description of the above technical solution:

[0009] The end surface of the second stator frame is also provided with circumferentially arranged reinforcing ribs.

[0010] As a further description of the above technical solution:

[0011] The number of connection blocks is 3.

[0012] As a further description of the above technical solution:

[0013] The first stator frame is provided with a plurality of clamping plates which are equidistantly arranged in the circumferential direction, and the clamping plates are clamped on the inner side wall of the inner ring plate of the casing.

[0014] As a further description of the above technical solution:

[0015] The inner side wall of the inner ring plate is provided with convex ribs, and the clamping plate is provided with grooves corresponding to the convex ribs.

[0016] As a further description of the above technical solution:

[0017] There are three card-jointing plates, and one card-jointing plate position corresponds to one connection block.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0019] 1. In the present invention, when the stator core assembly is installed into the casing, the frame boss of the second stator frame on the stator core assembly is clamped and positioned with the connection block inside the casing to limit the circumferential rotation of the stator core assembly, so that the stator core assembly can be installed into the casing smoothly, and the coaxiality after assembly is stable and easy to control.

[0020] 2. In the present invention, when the stator core assembly is installed into the casing, the connecting arm of the bracket is fixedly mounted on the connecting block of the casing by fastening bolts, and the connecting arm squeezes the arc-shaped arched portion on the stator core assembly to limit the axial position change of the stator core assembly. Therefore, the axial positioning of the stator core assembly does not require screws, which increases the matching surface between the bracket and the casing and makes the positioning of the bracket more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 The figure is a schematic diagram of a high coaxiality motor stator structure that is easy to install.

[0023] Figure 2 The figure is a cross-sectional view of a high coaxiality motor stator structure that is easy to install.

[0024] Figure 3 This is a schematic diagram of a disassembled stator structure of a high-coaxiality motor that is easy to install.

[0025] Figure 4 This is a partial schematic diagram of a high-coaxiality motor stator structure that is easy to install.

[0026] Legend:

[0027] 1. Casing; 11. Connecting block; 12. Inner ring plate; 2. Stator core assembly; 21. Stator core; 22. First stator frame; 221. Snap-in plate; 2211. Groove; 23. Second stator frame; 231. Protrusion; 232. Arc-shaped arch; 2321. Plane; 233. Reinforcement rib; 3. Bracket; 31. Connecting arm. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions 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. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figure 1-4The present invention provides a technical solution: a high coaxiality motor stator structure that is easy to install, comprising: a casing 1, a stator core assembly 2 and a bracket 3, the stator core assembly 2 is clamped in the casing 1, the stator core assembly 2 comprises a stator core 21, a first stator frame 22 and a second stator frame 23, the stator core 21 is clamped on the first stator frame 22, the second stator frame 23 is clamped on the first stator frame 22, a plurality of connecting blocks 11 arranged equidistantly in the circumferential direction are arranged on the inner side wall of the casing 1, the second stator frame 23 is clamped on the first stator frame 22, and the stator core 21 is clamped on the first stator frame 22. The frame 23 is provided with a skeleton boss corresponding to the position of the connecting block 11, and the skeleton boss includes protrusions 231 symmetrically arranged on both sides of the connecting block 11. An arc-shaped arched portion 232 is also provided on the end face of the second stator skeleton 23, and the arc-shaped arched portion 232 is arranged on one side of the connecting block 11. The bracket 3 is provided with a connecting arm 31 corresponding to the position of the connecting block 11, and the connecting arm 31 is fixedly installed on the connecting block 11 by fastening bolts. The fastening bolts are passed through the stator core assembly 2, and the bottom of the connecting arm 31 is against the arc-shaped arched portion 232.

[0034] A plane 2321 is provided on the top of the arc-shaped arched portion 232 to increase the contact area between the bottom of the connecting arm 31 and the arc-shaped arched portion 232, improve the pressing effect of the bracket 3 on the arc-shaped arched portion 232, and limit the axial position change of the stator core assembly.

[0035] Circumferentially arranged reinforcing ribs 233 are also provided on the end surface of the second stator frame 23, and the two sides of the arc-shaped arched portion 232 are supported by the reinforcing ribs 233 (see the attached drawings for details), so that the arc-shaped arched portion 232 is not easily deformed and damaged (ensuring the elasticity of the arc-shaped arched portion 232), thereby ensuring the clamping effect of the bracket 3 on the arc-shaped arched portion 232.

[0036] The number of the connecting blocks 11 is three, which can fully position the stator core assembly.

[0037] The first stator frame 22 is provided with a plurality of circumferentially equidistantly arranged clamping plates 221 , which are clamped on the inner side wall of the inner ring plate 12 of the casing 1 to ensure that the stator core assembly 2 is smoothly installed into the casing 1 .

[0038] The inner side wall of the inner ring plate 12 is provided with a convex rib, and the clamping plate 221 is provided with a groove 2211 corresponding to the convex rib. The cooperation between the convex rib and the groove 2211 on the clamping plate 221 can effectively cooperate with the skeleton boss to limit the circumferential rotation of the stator core assembly, making the coaxiality stable and easy to control.

[0039] The number of the clamping plates 221 is three, and one clamping plate 221 corresponds to one connecting block 11 , thereby improving the matching effect between the clamping plate 221 and the frame boss.

[0040] Working principle: When the stator core assembly is installed into the casing, the frame boss of the second stator frame on the stator core assembly is clamped and positioned with the connection block inside the casing, limiting the circumferential rotation of the stator core assembly, and the stator core assembly is smoothly installed into the casing. After assembly, the coaxiality is stable and easy to control. When the stator core assembly is installed into the casing, the connecting arm of the bracket is fixedly installed on the connection block of the casing by fastening bolts. The connecting arm squeezes the arc-shaped arched part on the stator core assembly to limit the axial position change of the stator core assembly. Therefore, the axial positioning of the stator core assembly does not require screws, which increases the matching surface between the bracket and the casing, making the bracket positioning more reliable.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high coaxiality motor stator structure that is easy to install, characterized in that: include: A housing (1), a stator core assembly (2) and a bracket (3), wherein the stator core assembly (2) is clamped in the housing (1), the stator core assembly (2) comprises a stator core (21), a first stator frame (22) and a second stator frame (23), the stator core (21) is clamped on the first stator frame (22), the second stator frame (23) is clamped on the first stator frame (22), a plurality of connection blocks (11) arranged equidistantly in the circumferential direction are provided on the inner side wall of the housing (1), and the second stator frame (23) is provided with a plurality of connection blocks (11) arranged equidistantly in the circumferential direction. A skeleton boss, the skeleton boss comprising protrusions (231) symmetrically arranged on both sides of the connecting block (11), an arc-shaped arched portion (232) is also provided on the end surface of the second stator skeleton (23), the arc-shaped arched portion (232) is provided on one side of the connecting block (11), the bracket (3) is provided with a connecting arm (31) whose position corresponds to the connecting block (11), the connecting arm (31) is fixedly mounted on the connecting block (11) by means of a fastening bolt, the fastening bolt is passed through the stator core assembly (2), and the bottom of the connecting arm (31) is against the arc-shaped arched portion (232); A plane (2321) is provided on the top of the arc-shaped arched portion (232); The end surface of the second stator frame (23) is also provided with circumferentially arranged reinforcing ribs (233); The number of the connecting blocks (11) is 3.

2. The high coaxiality motor stator structure that is easy to install according to claim 1 is characterized in that: The first stator frame (22) is provided with a plurality of circumferentially equidistantly arranged clamping plates (221), and the clamping plates (221) are clamped onto the inner side wall of the inner ring plate (12) of the housing (1).

3. The high coaxiality motor stator structure that is easy to install according to claim 2 is characterized in that: The inner side wall of the inner ring plate (12) is provided with a convex rib, and the clamping plate (221) is provided with a groove (2211) whose position corresponds to the convex rib.

4. The high coaxiality motor stator structure that is easy to install according to claim 3 is characterized in that: The number of the clamping plates (221) is three, and one clamping plate (221) corresponds to one connecting block (11).

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