Fan motor structure

Abstract

The present invention provides a fan motor structure, including a stator base, a wiring harness fixing assembly, a stator assembly and a back cover; the stator base has a plurality of through holes penetrating the front and back sides thereof, and the front side of the stator base is provided with a central axis and a stator assembly, and the back side is provided with a wiring harness fixing assembly for fixing a wiring harness group, and the wiring harness fixing assembly has a plurality of positioning holes corresponding to the through holes; the back cover is provided on the back side of the stator base to cover the wiring harness fixing assembly; the stator assembly has a winding terminal connected to the winding group, and the free end of the winding terminal extends from the front side of the stator base through the through hole to the back side of the stator base, and is inserted into the positioning hole of the wiring harness fixing assembly, thereby connecting to the wiring harness group; thereby, the stator assembly is connected to the wiring harness fixing assembly in a forward direction, so as to achieve accurate assembly positioning and simple combination, and at the same time, the winding of the winding group will not be cut, thereby preventing leakage.

Description

Technical Field

[0001] The present invention relates to a motor main body, and in particular to a fan motor structure. Background Art

[0002] Prior art, such as Chinese application number CN201911239124.4, discloses a motor body of an automobile cooling fan, comprising an outer rotor 11, an armature assembly 12, a heat sink 13 and a rear end cover 17. A central shaft 15 is provided on the front of the heat sink 13, and the armature assembly 12 is installed thereon, and the central shaft 15 is connected to and used to drive the outer rotor 11. A conductive bracket mounting area 131 and a wiring harness mounting area 132 are provided on the back of the heat sink 13. A conductive bracket 14 is provided in the conductive bracket mounting area 131, which is provided with three mounting holes 141, and four metal connecting plates are embedded in the conductive bracket 14. One end of these four metal connecting plates forms a wiring harness fixing pin 143, which is fixedly connected to the four wiring harnesses 181 to 184 via the wiring harness pressing block 16, and is located in the wiring harness mounting area 132. The other ends of three of the metal connecting pieces are provided with connecting rod fixing pins 144 corresponding to the three mounting holes 141, and the remaining metal connecting piece is provided with a grounding electrode 145 connected to the heat sink 13. A conductive connecting rod 19 is installed in each mounting hole 141. The front ends of the three conductive connecting rods 19 protrude toward the back of the heat sink 13, and the rear ends are fixed to the three connecting rod fixing pins 144 respectively.

[0003] The heat sink 13 is provided with a through hole 133 for the conductive connecting rod 19 to pass through, so that the conductive connecting rod 19 passes through the through hole 133 from the back of the heat sink 13 and protrudes to the front of the heat sink 13, and then is inserted into the armature assembly 12 and electrically connected with its three-phase winding. However, the method of using the electric connecting rod 19 to plug the armature assembly 12 in the reverse (reverse) direction not only causes the electric connecting rod 19 to be blindly plugged in so that it is not easy for the electric connecting rod 19 to be connected to the corresponding three-phase winding of the armature assembly 12. During the blind plugging process between the conductive connecting rod 19 and the armature assembly 12, it is easy for the conductive connecting rod 19 to damage the insulating paint on the outer surface of the winding (such as enameled wire) of the three-phase winding of the armature assembly 12, causing potential leakage risk. This situation leads to unpredictable safety risks and has a serious impact on the automotive system using this technology.

[0004] Furthermore, the aforementioned existing technology introduces potential production efficiency losses and the risk of human error through the complex component assembly and positioning process. In practice, dimensional tolerances of individually manufactured components lead to assembly errors, increasing assembly complexity and requiring additional time to ensure accurate positioning. This not only increases assembly costs but can also result in incomplete or incorrect assembly, compromising the reliability and stability of the motor.

[0005] Therefore, how to solve the above problems and deficiencies is the direction that the inventors of this case and related manufacturers engaged in this industry are eager to study and improve. Summary of the Invention

[0006] Therefore, an object of the present invention is to provide a fan motor structure that can solve the above problems.

[0007] The present invention provides a fan motor structure, characterized by comprising:

[0008] A stator base having a front surface and a back surface and a plurality of through holes extending from the front surface to the back surface, wherein the front surface is provided with a central shaft connected to a rotor assembly;

[0009] A harness fixing assembly is provided on the back of the stator seat and has a plurality of positioning holes and a harness installation area. The plurality of positioning holes correspond to the through holes of the stator seat. The harness installation area is for installing a harness assembly.

[0010] A stator assembly is disposed on the front surface of the stator base and surrounds the central axis, and includes a stator core, a winding group wound on the stator core, and a plurality of winding terminals. The stator core has an upper insulating frame, a lower insulating frame, and a silicon steel sheet group. The silicon steel sheet group is sandwiched between the upper and lower insulating frames. The plurality of winding terminals are disposed on the upper insulating frame and connected to the winding group. Each of the plurality of winding terminals has a free end. The free end passes through the plurality of through holes from the front surface of the stator base, extends out of the back surface of the stator base, and is inserted into the positioning hole of the wire harness fixing assembly to connect to the wire harness group.

[0011] A back cover is arranged on the back side of the stator seat to cover the wire harness fixing assembly.

[0012] In the fan motor structure, the wiring harness fixing component is a plastic plate or a printed circuit board.

[0013] The fan motor structure, wherein: the back side of the stator seat is provided with a receiving groove for receiving the wire harness fixing assembly.

[0014] The fan motor structure, wherein: the wiring harness group includes a grounding wire and three three-phase conductors, the grounding wire is connected to a grounding electrode, and the three three-phase conductors are respectively connected to the plurality of winding terminals.

[0015] The fan motor structure, wherein: the three three-phase conductors and the grounding wire are provided with a metal connector, and the free ends of the plurality of winding terminals are connected to the metal connectors of the three three-phase conductors.

[0016] The fan motor structure, wherein: the upper insulating frame of the stator assembly is provided with a plurality of fixing grooves for fixing the plurality of winding terminals.

[0017] The fan motor structure, wherein: the wiring harness fixing assembly is provided with three protrusions, the three protrusions correspond to the through holes of the stator seat, and the three protrusions respectively pass through three of the positioning holes.

[0018] The present invention utilizes the above-mentioned features to simplify the motor structure. Furthermore, by inserting the winding terminals of the stator assembly into the wiring harness fixing assembly in a forward manner through the stator base, accurate insertion and positioning and easy assembly can be achieved. This improves the safety issue of the prior art where reverse insertion, blind insertion, may cause damage to the insulating paint on the outer surface of the winding of the three-phase winding, thereby causing potential leakage risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the existing structure;

[0020] Figure 2 It is a three-dimensional exploded schematic diagram of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the stator assembly installed on the front of the stator base;

[0022] Figure 4 This is a three-dimensional schematic diagram of the wiring harness fixing assembly installed on the back of the stator seat;

[0023] Figure 5 This is a schematic diagram of the back side of the stator seat;

[0024] Figure 6A and Figure 6B It is a schematic diagram of the front and back sides of the wiring harness fixing component;

[0025] Figure 7 A three-dimensional schematic diagram of the stator assembly.

[0026] Explanation of the accompanying drawings: fan motor structure 20; stator seat 21; front 211; back 212; through hole 213; center axis 214; accommodating groove 215; wire harness fixing assembly 22; positioning holes 221, 222, 223, 224; wire harness installation area 226; groove 2261; boss 227; stator assembly 23; upper insulating frame 2311; fixing groove 23111; lower insulating frame 2312; winding group 232; silicon steel sheet group 233; winding terminal 2; 34; free end 2341; back cover 24; rotor assembly 25; wire harness group 26; three-phase conductors 261-263; grounding wire 264; metal connector 26. DETAILED DESCRIPTION

[0027] The above-mentioned objectives and structural and functional characteristics of the present invention will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0028] Please refer to Figure 2, which is a schematic diagram of a three-dimensional decomposition of the present invention; Figure 3 This is a three-dimensional schematic diagram of the stator assembly installed on the front of the stator base; Figure 4 This is a three-dimensional schematic diagram of the wiring harness fixing assembly installed on the back of the stator seat; Figure 5 This is a schematic diagram of the back side of the stator seat; Figure 6A and Figure 6B It is a schematic diagram of the front and back sides of the wiring harness fixing component;

[0029] Figure 7 The stator assembly is a three-dimensional schematic diagram. As shown in the figure, the fan motor structure 20 includes a stator base 21, a harness fixing assembly 22, a stator assembly 23 and a back cover 24. The stator base 21 has a front face 211 and a back face 212 and a plurality of through holes 213 extending from the front face 211 to the back face 212 (such as Figure 5 As shown in FIG, the front side 211 is provided with a central shaft 214 connected to an external rotor assembly 25. The back side 212 is provided with a receiving groove 215.

[0030] The harness fixing assembly 22 is disposed on the back side 212 of the stator base 21 and is received in the receiving groove 215 disposed on the back side 212. The harness fixing assembly 22 has a plurality of positioning holes 221-224 and a harness installation area 226 (e.g., Figure 6A As shown in FIG2 , the harness mounting area 226 is provided on the upper surface of the harness fixing assembly 22 for mounting a harness assembly 26. The harness fixing assembly 22 is, for example, a non-conductive plate (such as a plastic plate), or a printed circuit board. In this embodiment, it is a plastic plate and is provided with four positioning holes 221 to 224, three of which correspond to the through holes 213 of the stator seat 21, and the remaining positioning hole 224 serves as a grounding electrode. The harness mounting area 226 is provided with several grooves 2261 to accommodate the harness assembly 26 (such as FIG2 ). Figure 6A ). The wiring harness assembly 26 includes three three-phase conductors 261-263 and a grounding wire 264. A metal connector 267 is provided at the front end of each wiring harness 261-264. The metal connectors 267 (e.g., metal hooks) of the three-phase conductors 261-263 correspond to the three positioning holes 221-223, respectively. The metal connector 267 (e.g., a metal washer) of the grounding wire 264 is connected (e.g., screwed) to the positioning hole 264 serving as the grounding electrode.

[0031] The stator assembly 23 is disposed on the front side 211 of the stator base 21 and surrounds the central axis 214. Figure 7The figure shows a stator core and a winding group 232 wound on the stator core and a plurality of winding terminals 234. The stator core has an upper insulating frame 2311 and a lower insulating frame 2312 corresponding to each other, and a silicon steel sheet group 233 is sandwiched between the upper insulating frame 2311 and the lower insulating frame 2312. The silicon steel sheet group 233 is composed of a plurality of stacked silicon steel sheets. The winding group 232 is, for example, an enameled wire or other conductive wire wound on the outer surfaces of the upper and lower insulating frames 2311 and 2312. The plurality of winding terminals 234 are arranged on a surface of the upper insulating frame 2311 facing the stator base 21, and are connected to the winding group 232, and have a free end 2341 extending toward the stator base 21. In this embodiment, an upper insulating frame 2311 of the stator core is provided with a plurality of fixing grooves 23111 for fixing the plurality of winding terminals 234 (such as Figure 7 shown).

[0032] During assembly, as the wire harness fixing assembly 22 and the stator assembly 23 are installed on the back side 212 and the front side 211 of the stator base 21, three of the positioning holes 221 to 223 of the wire harness fixing assembly 22 correspond to the through holes 213 of the stator base 21 respectively. The free end 2341 of the winding terminal 234 of the stator assembly 23 passes through the plurality of through holes 213 from the front side 211 of the stator base 21, then extends to the back side 212 of the stator base 21, and is then inserted into the three positioning holes 221 to 223 of the wire harness fixing assembly 22. The free end 2341 protrudes from the three positioning holes 221 to 223 to the upper surface of the wire harness fixing assembly 22 and is flush with or slightly higher than the metal connector 267 of the three-phase conductors 261-263. In this manner, the winding terminals 234 of the stator assembly 23 are connected and secured to the metal connectors 267 (e.g., metal hooks) of the three three-phase conductors 261-263 of the wiring harness assembly 26. The metal connector 267 of the grounding wire 264 is connected (e.g., by a screw) to the positioning hole 224, which serves as the grounding electrode. The back cover 24 is mounted on the receiving slot 215 on the back side of the stator base 21 to cover the wiring harness securing assembly 22 located within the receiving slot 215.

[0033] Furthermore, the aforementioned wiring harness fixing assembly 22 is provided with three bosses 227 corresponding to the through hole 213 of the stator seat 21, and the positioning holes 221-223 respectively penetrate the bosses 227 (such as Figure 6B The free ends 2341 of the winding terminals 234 of the stator assembly 23 pass through the plurality of through-holes 213 from the front surface 211 of the stator base 21, extend to the back surface 212 of the stator base 21, and then are inserted through the three protrusions 227 of the wire harness fixing assembly 22 into the positioning holes 221-223. The free ends 2341 extend out of the upper surface of the wire harness fixing assembly 22, and are flush with or slightly higher than the metal connector 267 at the front end of the wire harness 26, thereby connecting to the three-phase conductors 261-263.

[0034] By virtue of the above structure, the components of the motor structure of the present invention are simple, and the winding terminal 234 of the stator assembly 23 is used to plug the wiring harness fixing assembly 22 in a forward manner through the stator seat 21, which can achieve accurate positioning and easy assembly, thereby improving the blind plugging problem of the prior art in which the conductive connecting rod is plugged in reverse and the armature assembly is not easy to connect with the three-phase winding of the armature assembly, and preventing the insulating paint on the outer surface of the winding of the three-phase winding from being damaged due to the blind plugging process, thereby preventing the safety problem of potential leakage risk.

[0035] The above description has provided a detailed description of the present invention. However, the above description is merely a preferred embodiment of the present invention and should not limit the scope of the present invention. In other words, all equivalent variations and modifications based on the present invention are still within the scope of the present invention.

Claims

1. A fan motor structure, characterized in that: include: A stator base having a front surface and a back surface and a plurality of through holes extending from the front surface to the back surface, wherein the front surface is provided with a central shaft connected to a rotor assembly; A harness fixing assembly is provided on the back of the stator seat and has a plurality of positioning holes and a harness installation area. The plurality of positioning holes correspond to the through holes of the stator seat. The harness installation area is for installing a harness assembly. A stator assembly is disposed on the front surface of the stator base and surrounds the central axis, and includes a stator core, a winding group wound on the stator core, and a plurality of winding terminals. The stator core has an upper insulating frame, a lower insulating frame, and a silicon steel sheet group. The silicon steel sheet group is sandwiched between the upper and lower insulating frames. The plurality of winding terminals are disposed on the upper insulating frame and connected to the winding group. Each of the plurality of winding terminals has a free end. The free end passes through the plurality of through holes from the front surface of the stator base, extends out of the back surface of the stator base, and is inserted into the positioning hole of the wire harness fixing assembly to connect to the wire harness group. A back cover is arranged on the back side of the stator seat to cover the wire harness fixing assembly.

2. The fan motor structure according to claim 1, wherein: The wiring harness fixing component is a plastic plate or a printed circuit board.

3. The fan motor structure according to claim 1, wherein: The back of the stator seat is provided with a receiving groove for receiving the wire harness fixing assembly.

4. The fan motor structure according to claim 1, wherein: The wiring harness assembly includes a grounding wire and three three-phase conductors. The grounding wire is connected to a grounding electrode, and the three three-phase conductors are respectively connected to the plurality of winding terminals.

5. The fan motor structure according to claim 4, wherein: The three three-phase conductors and the grounding wire are provided with a metal connector, and the free ends of the plurality of winding terminals are connected to the metal connectors of the three three-phase conductors.

6. The fan motor structure according to claim 1, wherein: The upper insulating frame of the stator assembly is provided with a plurality of fixing grooves for fixing the plurality of winding terminals.

7. The fan motor structure according to claim 1, wherein: The wiring harness fixing assembly is provided with three protruding posts, which correspond to the through holes of the stator seat, and the three protruding posts respectively pass through three of the positioning holes.

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