EPS motor stator split outlet PIN needle structure

Abstract

The present invention relates to the field of EPS motor technology, and in particular to a split-type outlet PIN pin structure of an EPS motor stator. It includes an iron core, a non-outlet end insulation frame, an outlet end insulation frame, a busbar, a common conductive strip and an enameled coil. The iron core is composed of a plurality of single-lobe iron cores, and a non-outlet end insulation frame and an outlet end insulation frame are respectively assembled on both end surfaces of the iron core. An enameled coil is sleeved on the single-lobe iron core, a busbar is mounted on the outlet end insulation frame, a common conductive strip is mounted on the busbar, one end of some enameled coils is connected to the common conductive strip, and a plurality of brackets are mounted on the busbar. The present invention makes the busbar structure simpler by fixing one end of the enameled coil and using it as a PIN pin, and does not need to embed a metal PIN pin, thereby reducing the cost of mold development. At the same time, when the busbar is produced by injection molding, it is not necessary to place three additional PIN pins, thereby improving production efficiency and reducing the mold opening and material costs of the PIN pins.

Description

Technical Field

[0001] The invention relates to the technical field of EPS motors, and in particular to a split-type outlet PIN needle structure of an EPS motor stator. Background Art

[0002] With the rapid development of the automobile industry, people are paying more and more attention to automobile EPS motors. The performance and stability of automobile steering motors play a very important role in the driving process of automobiles. In the production of steering motors, the stator outlet PIN needle structure is very important. The stator outlet PIN needle structure is a very important link affecting the motor assembly efficiency and quality stability. The PIN needle refers to a metal material used in the connector to complete the conduction (transmission) of electricity (signals).

[0003] In the current market, most of the steering motor stator output PIN pin structures use PIN pins and busbars to be fixed together by injection molding, that is, the output end of the stator coil enameled wire is welded to the PIN pin to form conduction.

[0004] However, the above-mentioned steering motor stator outlet PIN needle structure still has the following shortcomings:

[0005] 1. The busbar structure is complex, resulting in high mold costs and unstable quality for producing the busbar;

[0006] Second, during the injection molding of the busbar, three PINs need to be placed in three fixed positions, which reduces the production efficiency of the busbar;

[0007] 3. It is necessary to open another PIN pin stamping mold, and each busbar requires three PIN pins, which increases the mold opening and material costs.

[0008] In the prior art, there is a modular multifunctional busbar (Announcement No.: CN207994554U), whose structure includes a main busbar and a plurality of functional modules installed on the main busbar, wherein the functional module includes an insulating support block and a connector fixed on the insulating support block; the insulating support block is connected to the main busbar; the connector is provided with a positive PIN pin, a signal PIN pin and a negative PIN pin; the positive PIN pin is connected with a positive copper strip, the negative PIN pin and the signal PIN pin are connected with a negative copper strip, and the positive copper strip is connected with a fuse; the negative copper strip is connected with the negative connection end of the main busbar, and the positive copper strip and the fuse are connected with the positive connection end of the main busbar through a positive connection copper strip. In the production process of the modular multifunctional busbar, it is necessary to install a connector on the busbar, and then install the three PIN pins of the positive PIN pin, the signal PIN pin and the negative PIN pin, which is complicated to operate and affects the production efficiency of the busbar. Summary of the invention

[0009] In view of the problems existing in the background technology, a split-type outlet PIN needle structure of the EPS motor stator is proposed.

[0010] The present invention proposes a split-type line-outlet PIN needle structure for an EPS motor stator, comprising an iron core, wherein the iron core is composed of a plurality of single-lobe iron cores, and an insulating frame for a non-line-outlet end and an insulating frame for a line-outlet end are respectively assembled on both end surfaces of the iron core, an enameled coil is wound around the single-lobe iron core, and a busbar is installed on the insulating frame for the line-outlet end. The structure is characterized in that a common conductive strip is installed on the busbar, one end of a portion of the enameled coils is connected to the common conductive strip, a plurality of brackets are installed on the busbar, and one end of another portion of the enameled coils is connected to the plurality of brackets.

[0011] Preferably, the bracket is T-shaped, with two U-shaped grooves provided on the bracket, and the enameled coil is connected to the bracket by means of a U-shaped buckle.

[0012] Preferably, a plurality of single-lobe iron cores are spliced ​​to form a circular ring, and the splicing seams between two corresponding single-lobe iron cores are connected by welding.

[0013] Preferably, the number of single-lobe iron cores is set to twelve, the number of enameled coils is set to twelve, and the number of brackets is set to three, wherein one end of six enameled coils is connected to a common conductive bar by welding, and one end of the other six enameled coils is connected to three brackets.

[0014] Preferably, two mounting grooves are provided on the bracket, a U-shaped block is installed in the mounting groove, a mounting block is installed on the bracket, a buckle is provided on the mounting block, a connecting block is installed on the U-shaped block, a clamping hole is provided on the connecting block, and the clamping hole is connected to the buckle.

[0015] Preferably, a mounting groove is provided on the bracket, the mounting groove is provided between two mounting grooves, four mounting bolts with rectangular portions are provided on the mounting block, four threaded grooves are provided in the mounting groove, and the bottom end of the mounting bolt extends into the threaded groove and is screwed to the threaded groove.

[0016] Preferably, the buckle is made of plastic material, the bottom end of the buckle is set to be cylindrical, the upper end is set to be spherical, the diameter of the upper end of the buckle is larger than the diameter of the bottom end of the buckle, and a buffer groove is provided on the buckle. The buffer groove passes through the sphere at the upper end of the buckle and extends to the cylinder at the lower end. The buffer groove divides the sphere at the top end of the buckle and the cylindrical part at the bottom end into two symmetrical parts.

[0017] Preferably, two groups of reinforcement components are provided on the U-shaped block, one group of reinforcement components includes an adjustment groove opened on the U-shaped block, a rubber strip is provided in the adjustment groove, an adjustment block is slidably installed in the adjustment groove, one side of the adjustment block is connected to the rubber strip, and the adjustment groove extends from the other side of the adjustment block; the other group of reinforcement components includes an extrusion groove opened on the U-shaped block, a plurality of extrusion strips are installed in the extrusion groove, the plurality of extrusion strips are evenly distributed, a connecting spring is installed in the extrusion groove, a downward pressing block is provided in the extrusion groove, the downward pressing block is connected to the connecting spring, a spherical groove is opened on the inner wall of the extrusion groove, a spherical block is installed on the downward pressing block, and the spherical block is adapted to the spherical groove.

[0018] Preferably, the extruded strip is made of plastic material, and has a structure that is wide at the bottom and narrow at the top.

[0019] Preferably, the distance between the plurality of extruded strips is maintained between five millimeters and ten millimeters.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] By using a bracket and a U-shaped groove on the bracket to clamp and fix one end of a pair of enameled coils, one end of the enameled coil can be used as a PIN pin. This PIN pin structure can make the busbar structure simpler, without the need to embed metal PIN pins, reducing the cost of busbar mold development. At the same time, during the injection molding production of the busbar, there is no need to place three additional PIN pins, which improves production efficiency and reduces the mold opening and material costs of the PIN pins.

[0022] The U-shaped block can be quickly installed and removed by means of the mounting block and the buckles thereon and the card holes of the connecting block on the U-shaped block, thereby improving the replacement efficiency of the U-shaped block. Different U-shaped blocks can be replaced according to the diameter of one end of the enameled coil. The operation is simple and convenient. By installing different types of U-shaped blocks, the use range of the busbar can be indirectly increased. At the same time, the U-shaped block matching the enameled coil can ensure the stability of the installation with the busbar.

[0023] By setting up two sets of reinforcement components, the installation tightness of one end of the enameled coil can be ensured when it is connected to the busbar, so as to avoid the enameled coil softening due to long-term overheating during long-term use, resulting in loose connection with the bracket. In summary, the stability of the connection between the enameled coil and the outside world can be guaranteed, and the production quality of the stator can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 Another structural schematic diagram of the present invention;

[0026] Figure 3It is a schematic diagram of the connection structure between the bracket and the U-shaped block in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the mounting block and the buckle in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the U-shaped block in the present invention;

[0029] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of part A shown;

[0030] Figure 7 It is a cross-sectional structural schematic diagram of the U-shaped block in the present invention;

[0031] Figure 8 It is a schematic diagram of the cross-sectional structure of the lower pressing block in the present invention.

[0032] Figure numerals: 1. Single-petal iron core; 2. Insulation frame at non-outgoing line end; 3. Insulation frame at outgoing line end; 4. Enameled coil; 5. Busbar; 6. Common conductive bar; 7. Bracket; 8. U-shaped groove 1; 10. U-shaped block; 11. Mounting groove; 12. Mounting block; 13. Mounting bolt; 14. Buckle; 15. Adjustment groove; 16. Rubber strip; 17. Adjustment block; 18. Extrusion groove; 19. Spherical groove; 20. Extrusion strip; 21. Connecting spring; 22. Pressing block; 23. Spherical block; 24. Connecting block; 25. Clamping hole. DETAILED DESCRIPTION

[0033] Embodiment 1

[0034] like Figure 1 As shown, the present invention proposes a split-type outlet PIN structure for an EPS motor stator, which includes an iron core, a non-outlet end insulating frame 2, an outlet end insulating frame 3, a busbar 5, a common conductive bar 6 and an enameled coil 4.

[0035] The iron core is composed of twelve single-lobe iron cores 1, which are arranged in a ring shape. The joints between the corresponding two single-lobe iron cores 1 are connected by welding. The non-outgoing line end insulating frame 2 and the outgoing line end insulating frame 3 are respectively assembled on the two ends of the iron core. The enameled coil 4 is wound around the single-lobe iron core 1, the busbar 5 is installed on the outgoing line end insulating frame 3, and the common conductive bar 6 is installed on the busbar 5. A plurality of concave blocks are installed on the busbar 5. The common conductive bar 6 is inserted into the recesses of the plurality of concave blocks and fixed thereto to facilitate subsequent welding operations with one end of the enameled coil 4. One end of six enameled coils 4 is connected to the common conductive bar 6 by welding. Three brackets 7 are installed on the busbar 5. The bracket 7 is arranged in a T shape. Two U-shaped grooves 8 are provided on the bracket 7. One end of the other six enameled coils 4 is connected to the three brackets 7 by U-shaped buckles.

[0036] In this embodiment, one end of six enameled coils 4 is fixed by using a bracket 7 and a U-shaped clip to make one end of the enameled coil 4 used as a PIN needle. This method makes the structure of the busbar 5 simpler, does not need to embed metal PIN needles, and reduces the cost of busbar mold development. At the same time, when the busbar 5 is injection molded, there is no need to place three additional PIN needles, which improves production efficiency and reduces the mold opening and material costs of the PIN needles.

[0037] Embodiment 2

[0038] like Figure 2-Figure 4 As shown, the EPS motor stator split outlet PIN needle structure proposed by the present invention also includes two installation grooves, both of which are opened on the bracket 7, and U-shaped blocks 10 are arranged in the two installation grooves. The U-shaped block 10 is provided with a U-shaped groove 2, and the U-shaped groove 2 has the same function as the U-shaped groove 1 8 in the first embodiment. The U-shaped groove 2 can also be used to fix one end of the enameled coil 4 with a U-shaped buckle. The bracket 7 is provided with a mounting groove 11, and a mounting block 12 is installed in the mounting groove 11 through a mounting bolt 13. The mounting groove The groove 11 is opened between the two mounting grooves, and four mounting bolts 13 with rectangular sections are arranged on the mounting block 12. Four threaded grooves are opened in the mounting groove, and the bottom ends of the mounting bolts 13 extend into the threaded grooves and are screwed to the threaded grooves. The mounting bolts 13 are hexagon socket bolts. The mounting block 12 is provided with countersunk holes, and the mounting bolts 13 pass through the countersunk holes. The top of the mounting bolts 13 is flush with the top of the mounting block 12. The mounting block 12 is provided with a buckle 14, and the bottom end of the buckle 14 is set to be cylindrical, and the upper end is set to be spherical. The diameter of the upper end of 14 is larger than the bottom end diameter of the buckle 14. A buffer groove is provided on the buckle 14. The buffer groove penetrates the ball at the upper end of the buckle 14 and extends to the cylinder at the lower end. The ball at the top of the buckle 14 and the cylinder at the bottom are divided into two symmetrical parts through the buffer groove. The mounting block 12 can be installed on the bracket 7 after the injection molding of the busbar 5 is completed through the threaded connection method of the mounting bolt 13. This installation method can separately disassemble and assemble the buckle 14, which can facilitate the separate production and detection of the buckle 14 and ensure The production quality of the buckle 14, a connecting block 24 is installed on the U-shaped block 10, and a clamping hole 25 is opened on the connecting block 24, and the clamping hole 25 is connected to the buckle 14. The buckle 14 is made of plastic material. When the top of the buckle 14 is squeezed by the clamping hole 25 on the connecting block 24, the two divisions on the top will bend toward the middle, so that the clamping hole 25 is conveniently mounted on the cylinder at the lower end of the buckle 14, and then the connecting block 24 is limited by the ball at the upper end of the buckle 14, and then the U-shaped block 10 is indirectly limited to ensure the installation stability of the U-shaped block 10.

[0039] In this embodiment, when in use, it is first necessary to select a suitable U-shaped block 10 according to the diameter of one end of the enameled coil 4, and then insert the U-shaped block 10 into the installation groove, and then press the connecting block 24 downward so that the clamping hole 25 on the connecting block 24 is sleeved on the buckle 14, and the installation of the U-shaped block 10 can be completed. Similarly, when disassembling the U-shaped block 10, it is only necessary to give an upward thrust under the U-shaped block 10. Under the action of the thrust, the connecting block 24 is driven to rise, so that the clamping hole 25 moves upward and disengages from the buckle 14, and the removal of the U-shaped block 10 is completed. The operation is simple and convenient. In summary, through the arrangement of the buckle 14 and the clamping hole 25, the U-shaped block 10 can be disassembled and assembled by means of a buckle connection, thereby ensuring the disassembly and assembly efficiency of the U-shaped block 10, indirectly improving the production efficiency of the stator, and ensuring the production quality of the stator.

[0040] Embodiment 3

[0041] like Figure 3 , Figure 5-Figure 8As shown, a split-type outlet PIN needle structure of an EPS motor stator proposed by the present invention also includes two groups of reinforcement components, both of which are arranged on the U-shaped block 10, wherein one group of reinforcement components includes a plurality of adjustment grooves 15 opened on the U-shaped block 10, and the plurality of adjustment grooves 15 are evenly distributed on the inner wall of the second U-shaped groove on the U-shaped block 10 in an annular shape, and the adjustment groove 15 is arranged in a T-shape, and a rubber strip 16 is arranged in the adjustment groove 15, and the rubber strip 16 is made of rubber material and has a certain elasticity, and an adjustment block 17 is slidably installed in the adjustment groove 15, and the adjustment block 17 is arranged in a T-shape, and one side of the adjustment block 17 is connected to the rubber strip 16 by glue, and the other side of the adjustment block 17 extends out of the adjustment groove 15, and the adjustment block 17 is located at the adjustment One side outside the groove 15 is set to an arc shape and is adapted to the inner wall of the U-shaped groove 2, thereby preventing the adjusting block 17 from causing extrusion damage to one end of the enameled coil 4. The adjusting block 17 can be pushed to make close contact with the outer wall of one end of the enameled coil 4 through the rubber strip 16. This extrusion method can ensure that one end of the enameled coil 4 is in a straight state when connected to the U-shaped block 10, avoiding bending of one end of the enameled coil 4 in the U-shaped groove 2, affecting the effect of power transmission, and also avoiding heat accumulation caused by bending at one end of the enameled coil 4, reducing the probability of damage to the enameled coil 4, and indirectly improving the production quality of the stator. Another set of reinforcement components includes an extrusion groove 18 opened on the U-shaped block 10, and the extrusion groove 18 is located at the upper end of the U-shaped groove 2. A plurality of extrusion strips 20 are installed in the groove 18. The extrusion strips 20 are made of plastic material. The extrusion strips 20 can be installed in the extrusion groove 18 by hot melting. The extrusion strips 20 adopt a structure that is wide at the bottom and narrow at the top. The plurality of extrusion strips 20 are evenly distributed in a ring shape, and the distance between the plurality of extrusion strips 20 is maintained between five millimeters and ten millimeters. A connecting spring 21 is installed on the inner wall at the bottom of the extrusion groove 18. A lower pressing block 22 is arranged in the extrusion groove 18. The lower pressing block 22 is connected to the connecting spring 21. The shape of the lower pressing block 22 is adapted to the inner wall of the extrusion groove 18. A spherical groove 19 is opened on the inner wall of the extrusion groove 18. The edge of one side of the extrusion groove 18 close to the spherical groove 19 is set as a bevel. The setting of the bevel can facilitate the lower pressing block 22 to enter the extrusion groove 18. A plurality of spherical blocks 23 are installed on the outer wall, and the spherical blocks 23 are adapted to the spherical grooves 19. A plurality of receiving grooves are opened on the lower pressing block 22. One side of the spherical block 23 extends into the receiving groove and slides in contact with the inner wall of the receiving groove. A buffer spring is installed on the inner wall of the receiving groove, and one end of the buffer spring is connected to the spherical block 23. During the descending process of the lower pressing block 22, the spherical block 23 is squeezed and shrinks into the receiving groove. After the lower pressing block 22 descends to a certain height, the spherical block 23 extends into the spherical groove 19 under the action of the buffer spring, thereby completing the connection between the lower pressing block 22 and the U-shaped block 10, and under the extrusion of the lower pressing block 22, the plurality of extrusion strips 20 are tilted and in close contact with the outer wall of one end of the enameled coil 4, thereby improving the installation stability of one end of the enameled coil 4.

[0042] In this embodiment, by setting the rubber strip 16 and the adjustment block 17, the outer wall of the connecting wire at one end of the enameled coil 4 can be limited and reinforced to ensure that it is in a vertical state when connected to the U-shaped block 10, so as to avoid bending during long-term use, affecting the power transmission effect, and also avoiding heat accumulation and subsequent damage caused by bending at one end of the enameled coil 4, thereby improving the production quality of the stator. After one end of the enameled coil 4 is connected to the U-shaped block 10, the pressing block 22 can be pressed downward, and the pressing block 22 can be fixed by the spherical block 23 and the spherical groove 19. The pressing block 22 will squeeze the extrusion strip 20 during the pressing process, and one end of the enameled coil 4 can be reinforced by the extrusion strip 20, thereby avoiding the loosening of one end of the enameled coil 4 during long-term use, ensuring the stability of the connection between the enameled coil 4 and the outside world, and then improving the production quality of the stator again.

[0043] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A split-type outlet PIN structure of an EPS motor stator, comprising: The iron core is composed of a plurality of single-lobe iron cores (1), and each of the two end surfaces of the iron core is equipped with a non-outgoing line end insulating frame (2) and an outgoing line end insulating frame (3), an enameled coil (4) is wound on the single-lobe iron core (1), and a busbar (5) is installed on the outgoing line end insulating frame (3), characterized in that: A common conductive bar (6) is installed on the busbar (5), one end of a portion of the enameled coils (4) is connected to the common conductive bar (6), a plurality of brackets (7) are installed on the busbar (5), and one end of another portion of the enameled coils (4) is connected to the plurality of brackets (7); The bracket (7) is T-shaped, and two U-shaped grooves (8) are provided on the bracket (7). The enameled coil (4) is connected to the bracket (7) by means of a U-shaped buckle; A plurality of single-lobe iron cores (1) are spliced ​​together to form a circular ring, and the splicing seams between two corresponding single-lobe iron cores (1) are connected by welding; The number of single-flap iron cores (1) is set to twelve, the number of enameled coils (4) is set to twelve, and the number of brackets (7) is set to three, wherein one end of six enameled coils (4) is connected to a common conductive strip (6) by welding, and one end of another six enameled coils (4) is connected to three brackets (7); The bracket (7) is provided with two mounting grooves, a U-shaped block (10) is installed in the mounting grooves, a mounting block (12) is installed on the bracket (7), a buckle (14) is provided on the mounting block (12), a connecting block (24) is installed on the U-shaped block (10), a clamping hole (25) is provided on the connecting block (24), and the clamping hole (25) is connected to the buckle (14); The bracket (7) is provided with a mounting groove (11), the mounting groove (11) being provided between the two mounting grooves, the mounting block (12) being provided with four mounting bolts (13) in the form of rectangular sections, the mounting groove being provided with four thread grooves, the bottom ends of the mounting bolts (13) extending into the thread grooves and being screwed to the thread grooves; The buckle (14) is made of plastic material. The bottom end of the buckle (14) is set to be cylindrical, and the top end is set to be spherical. The diameter of the top end of the buckle (14) is larger than the diameter of the bottom end of the buckle (14). The buckle (14) is provided with a buffer groove, which passes through the spherical ball at the top end of the buckle (14) and extends to the cylinder at the bottom end. The buffer groove divides the spherical ball at the top end and the cylindrical part at the bottom end of the buckle (14) into two symmetrical parts. The U-shaped block (10) is provided with two sets of reinforcement components, one set of reinforcement components comprising an adjustment groove (15) provided on the U-shaped block (10), a rubber strip (16) provided in the adjustment groove (15), an adjustment block (17) slidably mounted in the adjustment groove (15), one side of the adjustment block (17) being connected to the rubber strip (16), and the other side of the adjustment block (17) extending out of the adjustment groove (15), and the other set of reinforcement components comprising an extrusion member (16) provided on the U-shaped block (10) A groove (18) is provided in the extrusion groove (18), a plurality of extrusion strips (20) are installed in the extrusion groove (18), the plurality of extrusion strips (20) are evenly distributed, a connecting spring (21) is installed in the extrusion groove (18), a lower pressing block (22) is provided in the extrusion groove (18), the lower pressing block (22) is connected to the connecting spring (21), a spherical groove (19) is opened on the inner wall of the extrusion groove (18), a spherical block (23) is installed on the lower pressing block (22), and the spherical block (23) is adapted to the spherical groove (19).

2. The EPS motor stator split outlet PIN needle structure according to claim 1, characterized in that: The extrusion strip (20) is made of plastic material, and has a structure that is wide at the bottom and narrow at the top.

3. The EPS motor stator split-type outlet PIN needle structure according to claim 1, characterized in that: The distance between the plurality of extruded strips (20) is maintained between five millimeters and ten millimeters.

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