Frameless motor

Abstract

The utility model relates to a frameless motor, which comprises an iron core group, an iron core insulating layer, an upper framework and a lower framework, the upper framework and the lower framework respectively comprise a positioning pin, the iron core group comprises a positioning groove, and the upper framework and the lower framework are arranged on the iron core group through the positioning pins and the positioning groove. The iron core insulating layers are installed on the iron core sets, and the adjacent iron core sets are connected. Compared with the prior art, the split type iron core is provided with the positioning grooves, the upper framework and the lower framework are provided with the positioning pins, and the positioning grooves and the positioning pins are matched with each other, so that the assembly precision is improved, the situation that installation is not in place in the installation process is prevented, and the positioning precision of subsequent components is improved; according to the utility model, the iron core insulating layer is arranged, so that the high-standard requirement of a microminiature frameless motor on the slot fullness rate is met by reducing the thickness of the insulating layer and providing the slot fullness rate under the condition that the insulating property is met, and the motor has better electromagnetic performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to frameless motor technical field especially is frameless motor. BACKGROUND

[0002] The conventional frameless motor adopts the insulation voltage resistance scheme of framework plastic wrapping, when the motor stator size is very small and the slot fullness rate requirement is high, the traditional insulation scheme will cause the stator winding effect to not meet the demand, and the motor performance is not up to standard, the conventional split stator iron core adopts the insulation framework to isolate the winding and the core, but it is difficult to guarantee the installation precision of the framework when the small split iron core adopts the upper and lower frameworks as the insulation scheme, the split stator iron core winding is block independent winding, after winding, each phase is connected through welding, the operation is tedious, when the core size is small, the operation difficulty is improved, the production efficiency is reduced, and the production defective rate is improved, after the split type core winding is spliced, welding needs to be used for fixing, and the same is limited by the core size, when the core size is small, the tooth yoke contact part is very thin, at this time, welding is used, which has a great risk of hurting the enameled wire, and the production yield is low.

[0003] The utility model patent with publication number CN216774432U discloses a plastic package motor plastic wrapping stator, including stator core, the inner edge of iron core is equipped with a plurality of inwardly extending slot tooth respectively, the winding slot is formed between every two slot tooth, the periphery of stator core, slot tooth and the inner wall of winding slot are equipped with insulation layer, compared with traditional process, the area in the slot is increased, higher slot fullness rate can be achieved, but the flexibility is not high by integrally injection molding, if a plurality of windings are spliced, the flexibility is high, but there is the problem of inaccurate positioning when splicing.

[0004] Therefore, it is currently urgent to provide a frameless motor that can splice and position accurately and improve slot fullness rate. UTILITY MODEL CONTENTS

[0005] The utility model discloses a frameless motor that overcomes the defects of the prior art.

[0006] The utility model discloses a frameless motor that overcomes the defects of the prior art.

[0007] According to one aspect of the utility model, a frameless motor is provided, including core group and core insulation layer, the motor still includes upper framework and lower framework, the upper framework and lower framework all include positioning pin, the core group includes positioning groove, the upper framework and lower framework are installed on the core group through positioning pin and positioning groove, the core insulation layer is installed on the core group, and a plurality of core groups are connected between adjacent core groups.

[0008] As a preferred technical scheme, the iron core group comprises an enameled wire and a split iron core, and the enameled wire is installed on the split iron core.

[0009] As a preferred technical scheme, the split iron core is a split iron core made by a spraying process.

[0010] As a preferred technical scheme, the split iron core comprises a single-tooth iron core piece, and the positioning slot is installed on the single-tooth iron core piece.

[0011] As a preferred technical scheme, the positioning pin is installed in the positioning slot.

[0012] As a preferred technical scheme, the upper framework further comprises a positioning cylinder.

[0013] As a preferred technical scheme, the motor further comprises a PCBA board, and the PCBA board is connected with the positioning cylinder.

[0014] As a preferred technical scheme, every three adjacent iron core groups are sequentially connected.

[0015] As a preferred technical scheme, the motor further comprises a pouring sealant, and the iron core groups are connected and fixed by the pouring sealant.

[0016] As a preferred technical scheme, the iron core insulation layer is an iron core insulation layer made by an epoxy finish.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The split iron core of the utility model is provided with a positioning slot, the upper framework and the lower framework are provided with a positioning pin, the assembly precision is improved through the cooperation of the positioning slot and the positioning pin, the installation is prevented from being out of position in the installation process, and therefore the positioning precision of subsequent components is improved.

[0019] 2. The utility model is provided with an iron core insulation layer, under the condition of meeting the insulation performance, the slot fill rate is provided by reducing the thickness of the insulation layer, the high standard requirement of the slot fill rate of the small frameless motor is met, the motor has better electromagnetic performance.

[0020] 3. The utility model adopts a three-connected winding scheme, every three iron core groups are sequentially connected, the production efficiency is improved, the consistency of every phase resistance and inductance is ensured through the control of the winding process and indexes, and therefore the consistency of every stator is ensured.

[0021] 4. The utility model adopts a pouring process, the split iron core is connected and fixed by using a pouring sealant, the production difficulty is reduced, the yield is improved, subsequent moisture, dust and other impurities are prevented from affecting the motor, the motor can be used under the conditions of high temperature, high humidity and high pressure, and the motor operation is more reliable and stable. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the iron core assembly connection of this utility model;

[0025] Figure 4 This is a simplified diagram of the enameled wire connection according to this utility model;

[0026] Figure 5 This is a schematic diagram of the single-tooth iron chip structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the upper frame structure of this utility model;

[0028] Figure 7 This is a practical drawing of the lower frame structure of this utility model;

[0029] Figure 8 This is an assembly effect diagram of the upper and lower skeletons of this utility model.

[0030] 1. Encapsulating adhesive; 2. PCBA board; 3. Enamelled wire; 4. Upper frame; 5. Split core; 6. Lower frame; 7. Core insulation layer; 8. Positioning groove; 9. Positioning pin; 10. Positioning cylinder. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0032] The insulation pressure resistance scheme of the conventional frameless motor is skeleton plastic wrapping. When the size of the motor stator is very small and the slot fill rate requirement is high, the traditional insulation scheme will cause the stator winding effect to not meet the demand, and the motor performance is not up to standard. The conventional split stator core adopts an insulation skeleton to isolate the winding from the core, but it is difficult to guarantee the installation precision of the skeleton when the upper and lower skeletons are used as the insulation scheme for the small split core. The split stator core winding is block independent winding, and each phase is connected through welding after winding. The operation is complicated, the operation difficulty is increased when the size of the core is small, the production efficiency is reduced, and the production defect rate is increased. The split core is spliced after winding, and welding is needed for fixing. Similarly, it is limited by the size of the core. When the size of the core is small, the contact part of the tooth yoke is very thin. At this time, welding is used, which has a great risk of damaging the enameled wire, and the production yield is low.

[0033] The utility model discloses a kind of insulation scheme and core and structure suitable for micro small frameless motor, meet the high standard requirement of micro small frameless motor (diameter 20mm below) to slot fill rate, further strengthen waterproof insulation performance, make motor operation more stable, reliable, and the overall structure of motor is compact, operation difficulty is low, easy production frameless motor structure scheme.

[0034] The utility model provides a kind of frameless motor, positioning slot is equipped on the split core of the utility model, and positioning pin is equipped with upper skeleton and lower skeleton, the assembly precision is improved by the mutual cooperation of positioning slot and positioning pin, prevent installation from not being in place during installation, to improve the positioning precision of subsequent components and parts.The utility model is provided with core insulation layer, under meeting insulation performance, provide slot fill rate by reducing the thickness of insulation layer, meet the high standard requirement of micro small frameless motor to slot fill rate, so that motor has better electromagnetic performance.The utility model adopts three continuous winding scheme, every three core groups are connected in turn, improve production efficiency, and the consistency of each phase resistance and inductance can be ensured by controlling winding process, index, to ensure the consistency of each stator.The utility model adopts filling process, and split core is connected and fixed by using filling glue, reduce production difficulty, improve yield, prevent subsequent moisture, dust and other impurities from affecting motor, so that motor can be used under high temperature, high humidity and high pressure conditions, motor operation is more reliable and stable.

[0035] Example 1

[0036] A frameless motor includes a core assembly and a core insulation layer 7. The motor also includes an upper frame 4 and a lower frame 6, each including a positioning pin 9. The core assembly includes a positioning groove 8. The upper frame 4 and lower frame 6 are mounted on the core assembly via the positioning pins 9 and the positioning groove 8. The core insulation layer 7 is mounted on the core assembly, and adjacent core assemblies are connected. The core assembly includes enameled wire 3 and a segmented core 5, with the enameled wire 3 mounted on the segmented core 5. The segmented core 5 is manufactured using a spray coating process. The segmented core 5 includes a single-toothed iron chip, and the positioning groove 8 is mounted on the single-toothed iron chip. The positioning pin 9 is mounted in the positioning groove 8.

[0037] In this embodiment, as Figures 1-8 As shown, the segmented iron core 5 adopts a spray coating process. The segmented iron core 5 is fixed by the positioning pins 9 of the upper frame 4 and the lower frame 6 cooperating with the positioning grooves 8, ensuring the installation accuracy of the upper frame 4 and the lower frame 6, preventing improper installation during the installation process, thereby improving the positioning accuracy of subsequent components, providing support for the enameled wire 3 and stabilizing the coil; a three-winding scheme is adopted, and the winding is completed by assembling every three groups to prevent improper installation during the installation process, thereby improving the positioning accuracy of subsequent components; the iron core uses a three-winding scheme to improve production efficiency. By controlling the winding process and indicators, the consistency of the resistance and inductance of each phase can be ensured, thereby ensuring the consistency of each stator.

[0038] The upper frame 4 also includes a positioning cylinder 10. The motor also includes a PCBA board 2, which is connected to the positioning cylinder 10.

[0039] In this embodiment, the end face of the upper frame 4 has a positioning cylinder 10, which can provide accurate positioning for the internal components on the PCBA board 2. After the segmented iron core 5 is assembled into a circle, it is connected to the PCBA board 2. The positioning accuracy of the components is ensured by the upper frame 4 and the lower frame 6.

[0040] The motor also includes potting compound 1, and the core assembly is connected and fixed by the potting compound 1. The core insulation layer 7 is made of epoxy topcoat.

[0041] In the embodiment, the split core 5 is filled with glue after being spliced, so that each core is connected and fixed, avoiding the risk of damage to the enameled wire during welding of the stator of the micro frameless motor, making the stator have higher strength, reducing production difficulty, improving yield, preventing the influence of subsequent moisture, dust and other impurities on the motor, so that the motor can be used in high temperature, high humidity and high pressure conditions, and the motor runs more reliably and stably; the epoxy topcoat is sprayed to form the core insulation layer, and the thickness of the insulation layer is less than 0.1 mm, so that the micro frameless motor has better electromagnetic performance.

[0042] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A frameless motor comprising a core set and a core insulation layer (7), characterized in that, The motor further comprises an upper frame (4) and a lower frame (6), the upper frame (4) and the lower frame (6) each comprise a positioning pin (9), the core group comprises a positioning groove (8), the upper frame (4) and the lower frame (6) are installed on the core group through the positioning pin (9) and the positioning groove (8), the core insulation layer (7) is installed on the core group, and adjacent core groups are connected.

2. A frameless motor according to claim 1, wherein The core group comprises an enameled wire (3) and a split core (5), and the enameled wire (3) is installed on the split core (5).

3. A frameless motor according to claim 2, wherein, The split core (5) is a split core (5) made by a spraying process.

4. A frameless motor as set forth in claim 2 wherein, The split core (5) comprises a single-tooth core piece, and the positioning groove (8) is installed on the single-tooth core piece.

5. A frameless motor according to claim 4, wherein, The positioning pin (9) is installed in the positioning groove (8).

6. A frameless motor as recited in claim 1, wherein, The upper frame (4) further comprises a positioning cylinder (10).

7. A frameless motor as claimed in claim 6, characterized in that The motor further comprises a PCBA board (2), and the PCBA board (2) is connected with the positioning cylinder (10).

8. A frameless motor as recited in claim 1, wherein, Every three adjacent core groups are sequentially connected.

9. A frameless motor as recited in claim 1, wherein, The motor further comprises a pouring sealant (1), and the core groups are connected and fixed through the pouring sealant (1).

10. A frameless motor as recited in claim 1, wherein, The core insulation layer (7) is a core insulation layer (7) made by an epoxy topcoat.

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