Insulation framework and motor stator

Abstract

The invention relates to the technical field of motors, in particular to an insulating framework and a motor stator, and the insulating framework comprises an insulating wall structure (1); two ends of the insulating wall structure (1) are respectively provided with a top wire protection structure (2) and a bottom wire protection structure (3); the insulating framework is an integral insulating framework and is coaxially arranged with the stator iron core, and the insulating framework wraps the stator iron core through injection molding and forms a whole with the stator iron core; according to the stator structure, insulation framework assembly is omitted, the stator structure is simplified, the stator process is optimized, the assembly time is shortened, the production efficiency of the stator can be effectively improved, and the reliability of connection between the insulation framework and the stator iron core can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an insulating frame and a motor stator. Background Art

[0002] A permanent magnet brushless DC motor includes components such as a stator, a rotor, and a housing. The stator is the stationary part of the motor, and its main function is to pass three-phase current to generate a rotating magnetic field. It is generally composed of three parts: a stator core, a stator winding, and an insulating frame. Existing permanent magnet brushless DC motor stator insulating frames are generally divided into an upper insulating frame and a lower insulating frame, which are nested in an upper and lower structure and are mounted on the stator core. Special press-fitting equipment is required for press-fitting. The production process is very complicated and the production cost is high. In addition, it cannot form a reliable fixation. The vibration generated by the motor during use can easily cause the insulating frame to loosen, which in turn has a negative impact on the performance and service life of the motor. The lead wires of the stator winding are usually welded or crimped, which also has the adverse effects of complex process, high production cost, and poor reliability.

[0003] After searching, the applicant found that the Chinese patent document with publication number 202872500U disclosed on April 10, 2013 a motor stator annular combined insulating sleeve and a motor stator assembly. The motor stator assembly includes an iron core, an insulating sleeve and a coil. The iron core is a combined iron core, including a star-shaped magnetic pole and an annular magnetic yoke; the insulating sleeve includes an even number of C-shaped nests evenly distributed along the circumference of the ring and a top plate with the same number of nests, and adjacent nests are connected by the top plate; the lower end of the nest includes an insertion port, and the nest includes an inner wall, an outer wall and a side wall. The opening of the C-shaped nest is opened on the outer wall, located at the junction of the outer wall and the side wall; the two insulating sleeves are relatively buckled on the star-shaped magnetic pole, and the insertion ports at the lower ends of the insulating sleeve nests are plugged into each other; this device also cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, it is necessary to provide an insulating frame and a motor stator that can simplify the assembly operation of the insulating frame and ensure the reliability of the connection between the insulating frame and the iron core. Summary of the Invention

[0005] The object of the present invention is to provide an insulating frame and a motor stator which can simplify the assembly operation of the insulating frame and ensure the reliability of the connection between the insulating frame and the iron core.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: an insulating frame, including an insulating wall structure; the two ends of the insulating wall structure are respectively provided with a top wire protection structure and a bottom wire protection structure.

[0007] The insulating wall structure includes a yoke insulating wall; tooth insulating walls are respectively provided at both ends of the yoke insulating wall; tooth boot insulating walls are provided at the ends of the tooth insulating wall away from the yoke insulating wall; winding mounting grooves are provided between adjacent tooth insulating walls; and motor windings are provided in the winding mounting grooves.

[0008] The top wire protection structure includes a top wire protection wall; the top wire protection wall is arranged at the end of the insulating wall structure; a top inner wire protection tooth is provided on one side of the top wire protection wall; a top outer wire protection tooth is provided on the other side of the top wire protection wall; the motor winding includes a connecting wire; the connecting wire is arranged on the top wire protection wall, and the connecting wire is arranged between the top inner wire protection tooth and the top outer wire protection tooth.

[0009] The top outer wire protection teeth are respectively provided with a terminal installation groove and a lead-out wire groove; the connecting wire includes a lead-out wire; the lead-out wire is arranged in the lead-out wire groove; the terminal installation groove is provided with a piercing terminal; the piercing terminal is connected to the lead-out wire.

[0010] The bottom wire protection structure includes a bottom wire protection wall; the bottom wire protection wall is arranged at the end of the insulating wall structure away from the top wire protection wall; a bottom inner wire protection tooth is provided on one side of the bottom wire protection wall; a bottom outer wire protection tooth is provided on the other side of the bottom wire protection wall; the connecting wire is arranged on the bottom wire protection wall, and the connecting wire is arranged between the bottom inner wire protection tooth and the bottom outer wire protection tooth.

[0011] A motor stator comprises the insulating skeleton; further comprising a stator core; the stator core comprises a stator yoke; the stator yoke is provided with stator teeth; the stator yoke and the stator teeth are both connected to the insulating wall structure; the top wire protection structure is connected to the top of the stator teeth; and the bottom wire protection structure is provided at the bottom of the stator teeth.

[0012] Stator slots are provided between adjacent stator teeth; the insulating wall structure is provided in the stator slots; the stator teeth include stator tooth bodies; one end of the stator tooth body is connected to the inner wall of the stator yoke; a stator tooth shoe is provided at the other end of the stator tooth body; the stator tooth shoes are respectively provided on both sides of the stator tooth body; and a slot is provided between adjacent stator tooth shoes.

[0013] The yoke insulating wall is connected to the stator yoke; the tooth insulating wall is connected to the stator tooth body; and the tooth shoe insulating wall is connected to the stator tooth shoe.

[0014] The stator tooth body is connected between the top wire protection wall and the bottom wire protection wall; the stator yoke is connected between the top outer wire protection teeth and the bottom outer wire protection teeth; the stator tooth shoe is connected between the top inner wire protection teeth and the bottom inner wire protection teeth.

[0015] The stator tooth body is provided with a buckle groove; the buckle groove is arranged at one end of the stator tooth body close to the stator yoke; a positioning protrusion is provided on the outer wall of the stator yoke; the stator core is injection-molded to the insulating frame.

[0016] The beneficial effects of this application are:

[0017] The present application provides an insulating frame and a motor stator. The insulating frame of the present application eliminates the nested structure of the upper and lower insulating frames in the existing solution. An integrated injection molding process is adopted, and the insulating frame is injection-molded onto the stator core to form a whole with the stator core. At the same time, a stator winding lead wire fixing structure is provided on the insulating frame. The stator structure of the present application eliminates the assembly of the insulating frame and the welding or crimping process of the stator lead wire, simplifies the stator structure, optimizes the stator process, reduces assembly time, can effectively improve the production efficiency of the stator, and can improve the reliability of the connection between the insulating frame and the stator core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, in which:

[0019] Figure 1 This is a schematic structural diagram of the motor stator of this application.

[0020] Figure 2 This is a schematic structural diagram of the insulating skeleton of this application.

[0021] Figure 3 This is a schematic structural diagram of the insulating wall structure of this application.

[0022] Figure 4 This is a schematic structural diagram of the bottom wire protection structure of this application.

[0023] Figure 5 This is a schematic structural diagram of the stator core of this application.

[0024] The marks in the above figure are:

[0025] The following are marked in the figure:

[0026] 1. Insulation wall structure, 101. Yoke insulation wall, 102. Tooth insulation wall, 103. Tooth shoe insulation wall, 104. Winding installation slot,

[0027] 2. Top wire protection structure, 201. Top wire protection wall, 202. Top inner wire protection teeth, 203. Top outer wire protection teeth, 204. Terminal installation slot, 205. Lead-out wire slot,

[0028] 3. Bottom wire protection structure, 301. Bottom wire protection wall, 302. Bottom inner wire protection teeth, 303. Bottom outer wire protection teeth,

[0029] 4. Stator core, 401. Stator yoke, 402. Stator teeth, 403. Stator slots, 404. Stator tooth body, 405. Stator tooth shoe, 406. Notch, 407. Buckle groove, 408. Positioning protrusion. DETAILED DESCRIPTION

[0030] The following is a further detailed description of the specific implementation methods of the present invention through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate their implementation.

[0031] Figure 1 The insulating frame shown includes an insulating wall structure 1; a top wire protection structure 2 and a bottom wire protection structure 3 are respectively provided at both ends of the insulating wall structure 1.

[0032] The top wire protection structure 2 and the bottom wire protection structure 3 are respectively arranged at the top and bottom of the insulating wall structure 1; the insulating wall structure 1, the top wire protection structure 2 and the bottom wire protection structure 3 are an integrated structure, and an integrated injection molding process is adopted. The insulating skeleton is injection molded onto the stator core 4 to form a whole with the stator core 4; the stator structure of the present application eliminates the assembly of the insulating skeleton, simplifies the stator structure, optimizes the stator process, reduces the assembly time, can effectively improve the production efficiency of the stator, and can improve the reliability of the connection between the insulating skeleton and the stator core 4.

[0033] The insulating wall structure 1 includes a yoke insulating wall 101; tooth insulating walls 102 are respectively provided at both ends of the yoke insulating wall 101; tooth shoe insulating walls 103 are provided at the ends of the tooth insulating wall 102 away from the yoke insulating wall 101; winding mounting grooves 104 are provided between adjacent tooth insulating walls 102; and motor windings are provided in the winding mounting grooves 104.

[0034] A plurality of insulating wall structures 1 are provided on the insulating skeleton; the yoke insulating wall 101 is an arc-shaped structure; the yoke insulating wall 101 is connected to the inner wall of the stator yoke 401; the tooth insulating wall 102 is connected to the outer walls on both sides of the stator tooth body 404; the tooth shoe insulating wall 103 is connected to the side of the stator tooth shoe 405 close to the stator yoke 401; the yoke insulating wall 101, the tooth insulating wall 102 and the tooth shoe insulating wall 103 are an integrated structure, and a winding mounting groove 104 is formed between the three; and an opening is provided between two adjacent tooth shoe insulating walls 103; the winding mounting groove 104 can provide an installation position for the motor winding; the insulating wall structure 1 can make the insulation process between the stator core 4 and the motor winding simpler, and achieve better insulation effect, reduce processing steps, save materials, and reduce costs.

[0035] The top wire protection structure 2 includes a top wire protection wall 201; the top wire protection wall 201 is arranged at the end of the insulating wall structure 1; a top inner wire protection tooth 202 is provided on one side of the top wire protection wall 201; a top outer wire protection tooth 203 is provided on the other side of the top wire protection wall 201; the motor winding includes a connecting wire; the connecting wire is arranged on the top wire protection wall 201, and the connecting wire is arranged between the top inner wire protection tooth 202 and the top outer wire protection tooth 203.

[0036] The top wire protection structure 2 is a ring structure; the top wire protection structure 2 includes multiple top wire protection walls 201; the top outer wire protection teeth 203 are evenly arranged along the outer ring edge of the top wire protection structure 2; the top inner wire protection teeth 202 are evenly arranged along the inner ring edge of the top wire protection structure 2, and the top inner wire protection teeth 202 and the top of the tooth boot insulating wall 103 are an integrated structure; the top outer wire protection teeth 203 and the top inner wire protection teeth 202 are arranged at both ends of the top wire protection wall 201, and the three are an integrated structure; the top wire protection structure 2 can provide protection for the connecting wires of the motor winding.

[0037] The top outer wire protection teeth 203 are respectively provided with a terminal installation groove 204 and a lead-out wire groove 205; the connecting wire includes a lead-out wire; the lead-out wire is arranged in the lead-out wire groove 205; the terminal installation groove 204 is provided with a piercing terminal; the piercing terminal is connected to the lead-out wire.

[0038] The terminal mounting groove 204 and the lead-out wire groove 205 are cross-arranged, and the terminal mounting groove 204 and the lead-out wire groove 205 are both arranged on the top surface of the top outer wire protection tooth 203; the lead-out wire groove 205 is provided with a chamfer to facilitate the lead-out wire to be inserted into the lead-out wire groove 205; while the terminal is inserted into the terminal mounting groove 204, the lead-out wire is pierced to achieve electrical connection, with a simple structure and reliable and convenient connection.

[0039] The bottom wire protection structure 3 includes a bottom wire protection wall 301; the bottom wire protection wall 301 is arranged at the end of the insulating wall structure 1 away from the top wire protection wall 201; a bottom inner wire protection tooth 302 is provided on one side of the bottom wire protection wall 301; a bottom outer wire protection tooth 303 is provided on the other side of the bottom wire protection wall 301; the connecting wire is arranged on the bottom wire protection wall 301, and the connecting wire is arranged between the bottom inner wire protection tooth 302 and the bottom outer wire protection tooth 303.

[0040] The bottom wire protection structure 3 is an annular structure; the bottom wire protection structure 3 includes multiple bottom wire protection walls 301; the bottom inner wire protection teeth 302 are arranged along the inner annular edge of the bottom wire protection structure 3, and the bottom inner wire protection teeth 302 and the bottom of the tooth boot insulating wall 103 are an integrated structure; the bottom outer wire protection teeth 303 are arranged along the outer annular edge of the bottom wire protection structure 3; the bottom inner wire protection teeth 302 and the bottom outer wire protection teeth 303 are respectively arranged at both ends of the bottom wire protection wall 301, and the three are an integrated structure; the bottom wire protection structure 3 can provide protection for the connecting wires of the motor winding.

[0041] A motor stator includes an insulating frame; a stator core 4; the stator core 4 includes a stator yoke 401; stator teeth 402 are provided on the stator yoke 401; the stator yoke 401 and the stator teeth 402 are both connected to an insulating wall structure 1; a top wire protection structure 2 is connected to the top of the stator teeth 402; and a bottom wire protection structure 3 is provided at the bottom of the stator teeth 402.

[0042] The insulating frame is an integral insulating frame, which is coaxially arranged with the stator core 4. The insulating frame is wrapped around the stator core 4 by injection molding and forms a whole with the stator core 4. The stator structure of the present application eliminates the assembly of the insulating frame, simplifies the stator structure, optimizes the stator process, reduces the assembly time, effectively improves the production efficiency of the stator, and can improve the reliability of the connection between the insulating frame and the stator core 4.

[0043] Stator slots 403 are provided between adjacent stator teeth 402; an insulating wall structure 1 is provided in the stator slots 403; the stator teeth 402 include stator tooth bodies 404; one end of the stator tooth body 404 is connected to the inner wall of the stator yoke 401; a stator tooth shoe 405 is provided at the other end of the stator tooth body 404; the stator tooth shoes 405 are respectively provided on both sides of the stator tooth body 404; and a slot 406 is provided between adjacent stator tooth shoes 405.

[0044] The stator core 4 is made of multiple thin silicon steel sheets stacked together; the stator yoke 401 is an annular structure, and the stator teeth 402 are evenly spaced along the annular inner wall of the stator yoke 401; stator slots 403 are formed between adjacent stator teeth 402; the number of stator slots 403 is the same as the number of stator teeth 402, which can be 6, 9 or 12, etc.; the stator tooth shoe 405 is an arc-shaped structure; the arc surface of multiple stator tooth shoes 405 can form a circle concentric with the stator yoke 401; the notch 406 between two adjacent stator tooth shoes 405 can facilitate the winding of the motor, and the width of the notch 406 is generally 2-3 times the diameter of the winding copper wire.

[0045] The yoke insulating wall 101 is connected to the stator yoke 401 ; the tooth insulating wall 102 is connected to the stator tooth body 404 ; and the tooth shoe insulating wall 103 is connected to the stator tooth shoe 405 .

[0046] The yoke insulating wall 101 is connected to the inner wall of the stator yoke 401; the tooth insulating wall 102 is connected to the outer walls on both sides of the stator tooth body 404; the tooth shoe insulating wall 103 is connected to the side of the stator tooth shoe 405 close to the stator yoke 401; the yoke insulating wall 101, the tooth insulating wall 102 and the tooth shoe insulating wall 103 are an integrated structure, and a winding mounting groove 104 is formed between the three; and an opening is provided between two adjacent tooth shoe insulating walls 103; the winding mounting groove 104 can provide an installation position for the motor winding; the insulating wall structure 1 can make the insulation process between the stator core 4 and the motor winding simpler, and the insulation effect is better, reduce the processing steps, save materials, and reduce costs.

[0047] The stator tooth body 404 is connected between the top wire protection wall 201 and the bottom wire protection wall 301; the stator yoke 401 is connected between the top outer wire protection teeth 203 and the bottom outer wire protection teeth 303; the stator tooth shoe 405 is connected between the top inner wire protection teeth 202 and the bottom inner wire protection teeth 302.

[0048] The top wire protection wall 201 is connected to the top surface of the stator tooth body 404; the bottom wire protection wall 301 is connected to the bottom surface of the stator tooth body 404; the top outer wire protection teeth 203 are connected to the top surface of the stator yoke 401; the bottom outer wire protection teeth 303 are connected to the bottom surface of the stator yoke 401; the top inner wire protection teeth 202 are connected to the top surface of the stator tooth shoe 405; and the bottom inner wire protection teeth 302 are connected to the bottom surface of the stator tooth shoe 405.

[0049] The stator tooth body 404 is provided with a buckle groove 407; the buckle groove 407 is provided at one end of the stator tooth body 404 close to the stator yoke 401; the outer wall of the stator yoke 401 is provided with a positioning protrusion 408; the stator core 4 is injection-molded to the insulating frame.

[0050] The buckle groove 407 is a square groove; the positioning protrusion 408 is provided on the outer wall of the stator yoke 401, and the stator yoke 401 is an integrated structure.

[0051] The specific workflow of the present invention is as follows:

[0052] The insulating frame is an integral insulating frame, which is coaxially arranged with the stator core 4. The insulating frame is wrapped on the stator core 4 by injection molding and forms a whole with the stator core 4; the yoke insulating wall 101 is connected to the stator yoke 401; the tooth insulating wall 102 is connected to the stator tooth body 404; the tooth shoe insulating wall 103 is connected to the stator tooth shoe 405; the stator tooth body 404 is connected between the top wire protection wall 201 and the bottom wire protection wall 301; the stator yoke 401 is connected between the top outer wire protection teeth 203 and the bottom outer wire protection teeth 303; the stator tooth shoe 405 is connected between the top inner wire protection teeth 202 and the bottom inner wire protection teeth 302.

[0053] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. An insulating frame, characterized in that: It comprises an insulating wall structure (1); a top wire protection structure (2) and a bottom wire protection structure (3) are respectively provided at two ends of the insulating wall structure (1).

2. An insulating frame according to claim 1, characterized in that: The insulating wall structure (1) comprises a yoke insulating wall (101); tooth insulating walls (102) are respectively provided at both ends of the yoke insulating wall (101); tooth shoe insulating walls (103) are provided at the ends of the tooth insulating walls (102) away from the yoke insulating wall (101); winding installation grooves (104) are provided between adjacent tooth insulating walls (102); and motor windings are provided in the winding installation grooves (104).

3. An insulating frame according to claim 2, characterized in that: The top wire protection structure (2) comprises a top wire protection wall (201); the top wire protection wall (201) is arranged at the end of the insulating wall structure (1); a top inner wire protection tooth (202) is provided on one side of the top wire protection wall (201); a top outer wire protection tooth (203) is provided on the other side of the top wire protection wall (201); the motor winding comprises a connecting wire; the connecting wire is arranged on the top wire protection wall (201), and the connecting wire is arranged between the top inner wire protection tooth (202) and the top outer wire protection tooth (203).

4. An insulating skeleton according to claim 3, characterized in that: The top outer side wire protection teeth (203) are respectively provided with a terminal installation slot (204) and a lead-out wire slot (205); the connecting wire includes a lead-out wire; the lead-out wire is arranged in the lead-out wire slot (205); a piercing terminal is provided in the terminal installation slot (204); the piercing terminal is connected to the lead-out wire.

5. An insulating frame according to claim 4, characterized in that: The bottom wire protection structure (3) comprises a bottom wire protection wall (301); the bottom wire protection wall (301) is arranged at the end of the insulating wall structure (1) away from the top wire protection wall (201); one side of the bottom wire protection wall (301) is provided with a bottom inner wire protection tooth (302); the other side of the bottom wire protection wall (301) is provided with a bottom outer wire protection tooth (303); the connecting wire is arranged on the bottom wire protection wall (301), and the connecting wire is arranged between the bottom inner wire protection tooth (302) and the bottom outer wire protection tooth (303).

6. A motor stator, characterized in that: The invention comprises the insulating skeleton according to any one of claims 1 to 5; further comprising a stator core (4); the stator core (4) comprises a stator yoke (401); stator teeth (402) are provided on the stator yoke (401); the stator yoke (401) and the stator teeth (402) are both connected to the insulating wall structure (1); the top wire protection structure (2) is connected to the top of the stator teeth (402); and the bottom wire protection structure (3) is provided at the bottom of the stator teeth (402).

7. A motor stator according to claim 6, characterized in that: Stator slots (403) are provided between adjacent stator teeth (402); the insulating wall structure (1) is provided in the stator slots (403); the stator teeth (402) include stator tooth bodies (404); one end of the stator tooth body (404) is connected to the inner wall of the stator yoke (401); a stator tooth shoe (405) is provided at the other end of the stator tooth body (404); the stator tooth shoes (405) are respectively provided on both sides of the stator tooth body (404); and a notch (406) is provided between adjacent stator tooth shoes (405).

8. A motor stator according to claim 7, characterized in that: The yoke insulating wall (101) is connected to the stator yoke (401); the tooth insulating wall (102) is connected to the stator tooth body (404); and the tooth shoe insulating wall (103) is connected to the stator tooth shoe (405).

9. A motor stator according to any one of claims 7-8, characterized in that: The stator tooth body (404) is connected between the top wire protection wall (201) and the bottom wire protection wall (301); the stator yoke (401) is connected between the top outer wire protection teeth (203) and the bottom outer wire protection teeth (303); and the stator tooth shoe (405) is connected between the top inner wire protection teeth (202) and the bottom inner wire protection teeth (302).

10. A motor stator according to claim 9, characterized in that: The stator tooth body (404) is provided with a buckle groove (407); the buckle groove (407) is provided at one end of the stator tooth body (404) close to the stator yoke (401); a positioning protrusion (408) is provided on the outer wall of the stator yoke (401); and the stator core (4) is connected to the insulating frame by injection molding.

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