A high-reliability stator assembly fixing structure

Abstract

The present invention discloses a high-reliability stator assembly fixing structure, comprising a shell assembly, a stator assembly and a connecting assembly. The stator assembly comprises a stator frame, a stator coil, a terminal, a circuit board assembly, a perforation and an annular pad; the connecting assembly comprises a connecting post, a threaded end, a nut and a support step. The stator coil is fixed to the circuit board assembly by welding through its terminal, which can ensure the consistency of the relative position between the stator and the circuit board assembly; the stator assembly and the connecting assembly are fixedly connected by a key-matching keyway and a nut limiter, which can effectively limit the degree of freedom between the stator assembly and the connecting assembly, improve the connection strength between the shell assembly and the stator assembly, and thus enhance the reliability of the stator assembly fixing structure; the circuit board assembly and the shell assembly are incompletely potted using potting glue, which greatly shortens the curing time of the glue while ensuring the reliability of the product structure.

Description

Technical Field

[0001] The invention belongs to the technical field of fan structures, and in particular provides a stator assembly fixing structure with high reliability. Background Art

[0002] With the advent of the information age, electronic technology has advanced rapidly. The core chips in computers and other electronic devices require fan components to dissipate heat and maintain the chip's operating temperature. Due to the huge and diverse market demand, the structural design of fan products has also diversified. The reliability of the fan stator assembly significantly affects the product's lifespan, making the design of a highly reliable fan stator mounting structure particularly important. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a fan stator assembly fixing structure with high reliability.

[0004] To achieve the above-mentioned object, the technical solution adopted by the present invention is: a high-reliability stator assembly fixing structure, comprising a housing assembly, a stator assembly and a connecting assembly, wherein the connecting assembly is assembled in the middle of the housing assembly, the stator assembly is fixedly mounted on the outside of the connecting assembly, and the stator assembly and the housing assembly are fixedly connected;

[0005] The stator assembly includes a stator frame, a stator coil, a terminal, a circuit board assembly, a through-hole and an annular pad. The stator coil is assembled on the outside of the stator frame, the terminal is assembled on the bottom of the stator frame, and the terminal is electrically connected to the stator coil. The through-holes are evenly arranged on the surface of the circuit board assembly, and the annular pad is embedded in the surface of the circuit board assembly, and the position of the annular pad is coaxial with the through-hole. The terminal passes through the through-hole and is welded to the annular pad by soldering. The stator frame is fixedly mounted on the connection assembly.

[0006] Furthermore, the connecting assembly includes a connecting column, a threaded end, a nut and a support step. The lower end of the connecting column is clamped in the middle of the shell assembly, the threaded end is arranged at the top of the connecting column, the support step is integrally formed on the side wall of the connecting column, and the support step is located at the root position of the threaded end. The inner wall of the stator frame is integrally formed with a positioning edge, the stator frame and the circuit board assembly are sleeved on the outside of the connecting column, the positioning edge is clamped on the upper part of the support step, the nut is screwed on the threaded end, and the positioning edge is clamped between the nut and the support step.

[0007] Furthermore, the shell assembly includes an outer shell, an inner shell, reinforcing ribs, a wiring groove, a positioning groove and potting glue. The outer shell and the inner shell are fixedly connected by the reinforcing ribs. The wiring groove is arranged between the outer shell and the inner shell, and the inner cavity of the inner shell is connected to the outer space of the outer shell through the wiring groove. The positioning groove is opened on the inner wall of the inner shell, and the lower end of the connecting column is clamped in the positioning groove. The potting glue is located in the annular groove of the inner cavity of the inner shell. The circuit board assembly is buckled on the upper side of the annular groove of the inner shell, and the circuit board assembly is bonded and fixed to the inner wall of the inner shell by the potting glue.

[0008] Furthermore, the inner side wall of the stator frame and the outer side wall of the connecting column are both provided with key slots, and keys are clamped in the key slots.

[0009] Furthermore, chamfers are provided at the edges of the upper surfaces of the reinforcing ribs.

[0010] Furthermore, the volume of the potting glue is no more than 50% of the volume of the inner cavity of the inner shell.

[0011] Furthermore, the positions of the reinforcing ribs and the wiring troughs are distributed in a centrally symmetrical manner.

[0012] The beneficial effects of using the present invention are:

[0013] 1. The stator coil is welded to the circuit board assembly through its terminal, which can ensure the consistency of the relative position between the stator and the circuit board assembly;

[0014] 2. The stator assembly and the connecting assembly are fixedly connected by means of a key, a keyway and a nut, which can effectively limit the degree of freedom between the stator assembly and the connecting assembly, improve the connection strength between the housing assembly and the stator assembly, and thus enhance the reliability of the stator assembly fixing structure;

[0015] 3. The circuit board assembly and the housing assembly are partially encapsulated with potting glue, which greatly shortens the curing time of the glue while ensuring the reliability of the product structure;

[0016] 4. The distribution of the reinforcement ribs and the wiring troughs enables each reinforcement rib and wiring trough to evenly distribute the force generated during the operation of the motor, and the chamfered structure on one side of the reinforcement rib can achieve good noise reduction and drainage effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the housing assembly of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the stator assembly of the present invention;

[0020] Figure 4 Schematic diagram of the structure of the connection assembly of the present invention.

[0021] The reference numerals include: 1-shell assembly; 101-outer shell; 102-inner shell; 103-reinforcement rib; 104-wiring groove; 105-positioning groove; 106-potting glue; 2-stator assembly; 201-stator frame; 202-stator coil; 203-positioning edge; 204-terminal; 205-circuit board assembly; 206-perforation; 207-annular pad; 3-connection assembly; 301-connection column; 302-threaded end; 303-nut; 304-support step; 4-keyway; 5-key. DETAILED DESCRIPTION

[0022] The present invention is described in detail below with reference to the accompanying drawings.

[0023] Reference Figures 1-4 A high-reliability stator assembly fixing structure includes a housing assembly 1, a stator assembly 2, and a connecting assembly 3. The connecting assembly 3 is assembled in the middle of the housing assembly 1, and the stator assembly 2 is fixedly installed on the outside of the connecting assembly 3. The stator assembly 2 is fixedly connected to the housing assembly 1.

[0024] The stator assembly 2 includes a stator frame 201, a stator coil 202, a terminal 204, a circuit board assembly 205, a through-hole 206 and an annular pad 207. The stator coil 202 is assembled on the outside of the stator frame 201, the terminal 204 is assembled on the bottom of the stator frame 201, and the terminal 204 is electrically connected to the stator coil 202. The through-holes 206 are evenly arranged on the surface of the circuit board assembly 205. The annular pad 207 is embedded in the surface of the circuit board assembly 205, and the position of the annular pad 207 is coaxial with the through-hole 206. The terminal 204 passes through the through-hole 206 and is soldered to the annular pad 207. The stator frame 201 is fixedly mounted on the connection assembly 3.

[0025] The stator coil 202 is fixed to the circuit board assembly 205 by welding via its terminal 204 , thereby ensuring the consistency of the relative positions between the stator and the circuit board assembly 205 .

[0026] The connecting assembly 3 includes a connecting column 301, a threaded end 302, a nut 303 and a support step 304. The lower end of the connecting column 301 is clamped in the middle of the shell assembly 1, the threaded end 302 is arranged at the top of the connecting column 301, the support step 304 is integrally formed on the side wall of the connecting column 301, and the support step 304 is located at the root position of the threaded end 302. The inner wall of the stator frame 201 is integrally formed with a positioning edge 203. The stator frame 201 and the circuit board assembly 205 are sleeved on the outside of the connecting column 301. The positioning edge 203 is clamped on the upper part of the support step 304. The nut 303 is screwed on the threaded end 302, and the positioning edge 203 is clamped between the nut 303 and the support step 304.

[0027] The shell assembly 1 includes an outer shell 101, an inner shell 102, a reinforcing rib 103, a wiring groove 104, a positioning groove 105 and a potting compound 106. The outer shell 101 and the inner shell 102 are fixedly connected by the reinforcing rib 103. The wiring groove 104 is arranged between the outer shell 101 and the inner shell 102, and the inner cavity of the inner shell 102 is connected to the outer space of the outer shell 101 through the wiring groove 104. The positioning groove 105 is opened on the inner wall of the inner shell 102, and the lower end of the connecting column 301 is clamped in the positioning groove 105. The potting compound 106 is located in the annular groove of the inner cavity of the inner shell 102. The circuit board assembly 205 is buckled on the upper side of the annular groove of the inner shell 102, and the circuit board assembly 205 is bonded and fixed to the inner wall of the inner shell 102 by the potting compound 106.

[0028] Preferably, the potting compound 106 is made of silicone rubber.

[0029] The inner wall of the stator frame 201 and the outer wall of the connecting column 301 are both provided with a key slot 4 , in which a key 5 is engaged.

[0030] The stator assembly 2 and the connecting assembly 3 are positioned by means of the keyway 4 and the key 5, which can effectively prevent radial rotation between the stator assembly 2 and the connecting assembly 3. The stator assembly 2 is fixed to the connecting assembly 3 by means of the nut 303. At the same time, the connecting assembly 3 is assembled on the housing assembly 1 in a snap-fit ​​manner, which can effectively prevent axial movement between the stator assembly 2 and the connecting assembly 3, thereby improving the connection strength between the housing assembly 1 and the stator assembly 2, and thereby enhancing the reliability of the stator assembly fixing structure.

[0031] The edges of the upper surfaces of the reinforcing ribs 103 are chamfered.

[0032] The chamfer can reduce the noise of the motor, and the plurality of chamfered reinforcing ribs 103 are distributed in a fan-shaped manner, which can achieve the effect of directional drainage.

[0033] The volume of the potting compound 106 is no greater than 50% of the volume of the inner cavity of the inner shell 102. That is, the potting is processed using an incomplete potting process.

[0034] The circuit board assembly 205 and the housing assembly 1 are partially potted using the potting glue 106, which not only ensures the reliability of the product structure but also greatly accelerates the curing time of the glue.

[0035] The positions of the reinforcing ribs 103 and the wiring grooves 104 are distributed in a centrally symmetrical manner.

[0036] The above content is only a preferred embodiment of the present invention. For ordinary technicians in this field, according to the concept of the present invention, many changes can be made in the specific implementation method and application scope. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of the present invention.

Claims

1. A high-reliability stator assembly fixing structure, characterized by: It includes a housing assembly, a stator assembly and a connecting assembly, wherein the connecting assembly is assembled in the middle of the housing assembly, the stator assembly is fixedly mounted on the outside of the connecting assembly, and the stator assembly is fixedly connected to the housing assembly; The stator assembly includes a stator frame, a stator coil, a terminal, a circuit board assembly, a through-hole and an annular pad. The stator coil is assembled on the outside of the stator frame, the terminal is assembled on the bottom of the stator frame, and the terminal is electrically connected to the stator coil. The through-holes are evenly arranged on the surface of the circuit board assembly. The annular pad is embedded in the surface of the circuit board assembly, and the position of the annular pad is coaxial with the through-hole. The terminal passes through the through-hole and is soldered to the annular pad by soldering. The stator frame is fixedly mounted on the connection assembly. The connecting assembly includes a connecting column, a threaded end, a nut and a support step. The lower end of the connecting column is clamped to the middle of the housing assembly, the threaded end is arranged at the top of the connecting column, the support step is integrally formed on the side wall of the connecting column, and the support step is located at the root position of the threaded end. The inner wall of the stator frame is integrally formed with a positioning edge. The stator frame and the circuit board assembly are sleeved on the outside of the connecting column, the positioning edge is clamped to the upper part of the support step, the nut is screwed to the threaded end, and the positioning edge is clamped between the nut and the support step. The housing assembly includes an outer housing, an inner housing, reinforcing ribs, a wiring groove, a positioning groove, and a potting compound. The outer housing and the inner housing are fixedly connected by the reinforcing ribs. The wiring groove is provided between the outer housing and the inner housing, and the inner cavity of the inner housing is connected to the outer space of the outer housing through the wiring groove. The positioning groove is provided on the inner wall of the inner housing, the lower end of the connecting column is clamped in the positioning groove, the potting compound is located in the annular groove of the inner cavity of the inner housing, the circuit board assembly is buckled on the upper side of the annular groove of the inner housing, and the circuit board assembly is bonded and fixed to the inner wall of the inner housing by the potting compound. The inner side wall of the stator frame and the outer side wall of the connecting column are both provided with key slots, and keys are clamped in the key slots.

2. A high-reliability stator assembly fixing structure according to claim 1, characterized in that: The edges of the upper surfaces of the reinforcing ribs are chamfered.

3. The high-reliability stator assembly fixing structure according to claim 1, characterized in that: The volume of the potting compound is no more than 50% of the volume of the inner cavity of the inner shell.

4. The high-reliability stator assembly fixing structure according to claim 1, characterized in that: The positions of the reinforcing ribs and the wiring trough are distributed in a centrally symmetrical manner.

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