Motor

Abstract

This application discloses an electric motor related to the field of motor manufacturing technology. It includes a shell, a stator, and a rotor. The stator has an output wire led out from the electromagnetic coil, and an insulated wire sleeve is provided in the outlet hole. The insulated wire sleeve has at least one outlet hole, and the output wire is led out through the outlet hole to the outside of the shell and electrically connected to the electrical components outside the motor. By machining the end of the electromagnetic coil of the stator to bring out the output wire, the multi-phase output wire is then led out of the shell through the outlet hole on the insulated wire sleeve, and the insulated wire sleeve is fixed in the outlet hole.After that, one end of the output wire is extended from the sheath and electrically connected to the terminal of the electrical component, thereby simplifying the connection structure between the electrical component and the electromagnetic stator coil, improving the overall quality of the motor, and reducing manufacturing costs. The connection between the stator winding and the electrical components is made simpler and more stable.

Description

TECHNICAL FIELD

[0001] This application relates to the field of motor manufacturing technology, in particular an electric motor. STATE OF THE ART

[0002] A busbar, also known as a bus bar, is a conductive connecting component of a multi-layered structure. It mainly includes a bus bar and an insulation layer, which are sequentially assembled, riveted, and packaged, and the busbar construction leads are welded to the cable. Busbars are widely used in motors to connect printed circuit boards and motor windings. Busbars are usually injection-molded from engineering plastic, with copper bars arranged inside. Their main function is to conduct current from the printed circuit board end into the motor winding, which creates a magnetic field to drive the rotor and generate torque to provide torque to the load.

[0003] In the present, with reference to Fig. 1, a conventional motor busbar installation structure is used in electronic power steering systems. The structure includes an upper terminal 61 and a lower copper bar 62. The lower copper bar 62 is connected to the output copper wire 7 of the stator winding by welding. The upper terminal 61 extends along the motor axis and is inserted into the hole of the circuit board. Then, the upper terminal 61 is connected to the conductive body and the circuit board by welding, thus connecting the circuit board and the stator winding. However, during use, it has been found that because the busbar 6 is made of copper bars and injection molded from engineering plastic, its manufacturing cost is high and the mass of the busbar 6 is relatively large, which is not conducive to the lightweight nature of the steering system.The busbar 6 is connected to the motor winding copper wire by welding, and the welding quality is greatly affected by the process and welding materials. At the same time, the welding process cost is also high, which is not conducive to product quality stability and cost reduction. Furthermore, if other structures are used to lead the copper wire 7 directly out of the motor without using a busbar, it is easy for the copper wire 7 to be short-circuited, which may cause a short circuit problem.

[0004] Therefore, there is an urgent need for a technology with lower quality, lower cost, stable connection quality and avoidance of line short circuits to connect the motor winding to the circuit board. CONTENT OF THE INVENTION

[0005] This application provides a motor that can solve the problems of high final product quality, high cost, unstable connection quality, and circuit short circuit prevention caused by the structure connecting the motor winding and the circuit board in the existing technology.

[0006] In order to solve one or more of the technical problems mentioned above, the technical solution applied in this application is the following: This application provides an engine, The motor comprises a shell, a stator, and a rotor, the stator having an output wire extending from an electromagnetic coil, the shell being provided with at least one outlet hole, and the output wire being provided with an insulating wire sleeve within the outlet hole. The insulating wire sleeve is provided with at least one outlet hole, and the output wire is led out through the outlet hole to the outside of the shell and electrically connected to the electrical components outside the motor. The insulating wire sleeve has the following: the head which, when inserted into the wire hole, is configured at one end of the axis direction of the wire hole; the body part configured on the opposite end side of the axis direction relative to the head near the lead hole; and the closure which, when inserted into the wire hole, is connected to the wire hole.

[0007] In addition, the jacket includes a main jacket having an opening at one end and an end cover for blocking the opening, all of which have wire holes open at one end of the main jacket, away from the opening.

[0008] In addition, the jacket includes a main jacket having an end opening and an end cover for covering the opening, all of which have wire holes opened at the end cover.

[0009] In addition, there are at least two closures.

[0010] In addition, the closure is made of elastic material or a structure with elasticity made of harder material.

[0011] In addition, the insulating wire sleeve is provided with a bypass groove, and the closure is arranged within the bypass groove.

[0012] Furthermore, the closure comprises a deformation part and a clamping part, wherein the clamping part is connected to the deformation part and extends at least partially beyond the outer contour of the insulating wire sleeve and the end of the clamping part is provided with an inclined surface.

[0013] In addition, the insulating wire sleeve is designed to have a straight or curved cross-section, perpendicular to its own axis.

[0014] In the second aspect, the present application also provides a motor comprising a shell, a stator, and a rotor, wherein the stator has an output wire led out from an electromagnetic coil, the shell is provided with a plurality of outlet holes, and the output wire is provided with an insulated wire barrel inside the outlet hole. The insulated wire barrel is provided with at least one outlet hole, and the output wire is led out to the outside through the outlet hole and electrically connected to the external electrical components of the motor. The feature is that there is a contact ring on the peripheral side of the insulated wire barrel, and after the insulated wire barrel is installed in place, the surface of the contact ring facing outward in the axial direction is lower than the surface of the peripheral side of the contact hole facing outward in the axial direction.

[0015] In addition, the insulating wire sleeve is designed to have a straight or curved cross-section, perpendicular to its own axis.

[0016] According to the specific embodiments provided in this application, the following technical effects are disclosed: By processing the stator electromagnetic coil to bring out the output wire, the multi-phase output wire is then led out of the casing through the outlet hole on the insulation wire sleeve, and the insulation wire sleeve is clamped in the outlet hole. After that, one end of the output wire is extended from the casing and electrically connected to the terminal of the electrical component, thereby simplifying the connection structure between the electrical component and the stator electromagnetic coil, avoiding short-circuiting between the output wires, improving the overall quality of the motor, reducing manufacturing costs, and making the connection between the stator winding and the electrical component simpler and more stable. DRAWINGS Fig. 1 is a schematic diagram of the structure of the prior art provided in this application; Fig. 2 is a cross-sectional view of the motor provided in the present embodiment of the application; Fig. 3 is a schematic diagram of the structure of the stator coil provided in the present embodiment of the application; Fig. 4 is an exploded view of the insulation wire sleeve and end cover assembly provided in the present embodiment of the application; Fig. 5 is a cross-sectional view of the closure connection provided in the present embodiment of the application; Fig. 6 is an enlarged view of position A in Fig. 4; Fig. 7 is a schematic diagram of the structure of an insulated wire barrel with a closure provided in the present embodiment of the application; Fig. 8 is a schematic diagram of the structure of another insulated wire barrel with a closure provided in the present embodiment of the application; Fig. 9 is a schematic diagram of the structure of the insulated wire barrel and the end cover provided in the present embodiment before bonding; Fig. 10 is a schematic diagram of the structure of the insulated wire barrel and the end cover provided in the present embodiment after bonding. DESCRIPTION OF SYMBOLS

[0017] 1. Shell; 11. Main shell; 12. End cap; 13. Open your mouth; 14. Make the wire hole; 2. Motor body; 21. Stator; 211. Stator slot; 212. Stator teeth; 213. Stator coil; 22. Rotor; 221. Rotor core; 222. Permanent magnet; 3. Terminal; 4. Shorting connector; 5. Insulated wire sleeve; 501. Head; 502 Body; 51. Outlet hole; 52. Shutter; 521. Deformation part; 522 Card connecting part; 53. Bypass slots; 54. Fitting ring; 541. Circular groove; 552. Storage space; 553. Adhesive; 6. Busbars; 61. Upper terminal; 62. Lower copper bar; 7. Output copper wire. IMPLEMENTATION MODALITIES

[0018] In this embodiment, the closure 52 is made of elastic material, which may be the same material as the insulating wire sleeve 5, or an elastic structure of the closure 52 made of harder materials, such as elastic fibers or metal, and integrated with the insulating wire sleeve 5.

[0019] Furthermore, the shutter 52 includes a deformation part 521 and a clamping part 522 that are integrally formed. The shutter 52 is integrally formed with the insulation wire barrel 5, and at least a part of the deformation part 521 is disposed in the bypass groove 53. At least a part of the clamping part 522 extends from the outer contour of the insulation wire barrel 5 along its own axis. One side of the clamping part 522 that is in contact with the inner wall of the wire hole 14 is a smooth plane. When the insulation wire barrel 5 is inserted into the wire hole 14, the clamping part 522 is detached from the inner wall of the wire hole 14. Due to the guidance of the end inclination, the deformation part 521 is deformed, and the clamping part 522 is retracted back to the outer surface wheel of the insulation wire barrel 5. Within the outline, the insulation wire sleeve 5 slides smoothly into the clamping part 522.When the insulation wire sleeve 5 slides into place, the clamping part 522 pops out and is clamped to the lower surface of the wire hole 14, matching with the axial limitation of the head 501, which fixes the insulation wire sleeve 5 in the wire hole 14.

[0020] In this embodiment, the shutter 52 does not extend out of the bypass groove 53 along the axis of the wire hole 14, thereby shortening the fixing time of the insulation wire sleeve 5 and improving the stability of the connection between the insulation wire sleeve 5 and the end cover 12.

[0021] Due to the use of riveting technology for fastening, it is necessary to place the specially matched components back into the riveting machine for positioning and riveting. This process is cumbersome, and the accuracy and quality of the riveting are difficult to control. The method of clamping the fastener 52 only involves pressing the insulation wire sleeve 5 into the wire hole 14 to complete the installation process, reducing the riveting process and the associated quality issues.

[0022] With reference to Fig. 5 and Fig. 8, the depth of the wire hole 14 varies according to the different thicknesses of the sheath 1 or the end cover 12. In order to ensure the strength of the deformation part 521, the length and position of the shutter 52 and the bypass groove 53 can be changed accordingly. Fig. 8 shows a scheme for adapting the insulation edge wire sleeve 5 to the thicker wire hole 14. In this scheme, the shutter 52 extends out of the bypass groove 53 along the axis of the wire hole 14, which reduces the volume of the insulation wire sleeve 5 in the axial direction and adapts to the greater depth of the wire hole 14.

[0023] Furthermore, the fastener 52 may also be directly connected to the lower side of the body part 502. That is, to accommodate different thicknesses, the deformation part 521 of the fastener 52 is directly connected to the lower side of the body part 502, and the fastener 52 extends directly from the body part 502. However, this plan also ensures that the deformation part 521 should not be too long to avoid losing its strength and to ensure its clamping function, and the longer deformation part 521 is prone to breakage during transportation.

[0024] Another implementation procedure is, as in Fig. 9 and Fig.10, a contact ring 54 is installed on the circumferential side of the insulation wire barrel 5. After the insulation wire barrel 5 is installed in place, the surface of the contact ring 54 facing outward in the axial direction is lower than the surface of the circumference that makes the wire hole 14 face outward in the axial direction. Another feasible solution is to lower the outer side of the insulation barrel 5 further than the outer side of the wire hole 14, and the circumferential direction of the contact ring 54 should be in contact with the inner wall of the wire hole 14 or have a predetermined distance therefrom, thereby forming a holding space 552 between the insulation barrel 5 and the wire hole 14. The holding space 552 is used to fill the adhesive 553 and adhere the insulation barrel 5 to the inner wall of the wire hole 14.

[0025] Specifically, in this embodiment, the insulating wire barrel 5 is configured to have a straight or circular arc shape in its cross section perpendicular to its own axis. Preferably, the cross-sectional profile of the insulated wire barrel 5 is generally elongated along its own axis, and the contact ring 54 is located on the side near the body portion 502 of the head 501 of the insulated wire barrel 5, which facilitates the formation of a holding space 552 on the outer side and the injection of adhesive 553. Among them, the adhesive 553 may be a single-component or two-component adhesive.

[0026] It should be noted that a single outgoing line is led out to the outside through a single outlet hole 51, while multiple outgoing lines are led out to the outside through corresponding outlet holes 51. Multiple outlet holes 51 can shorten the distance between outgoing lines while still maintaining relative independence between adjacent outgoing lines.

[0027] Furthermore, an electrical component (not shown in the figure) is installed on one side of the output wire extending from the casing 1. One end of the output wire extending from the casing 1 is electrically connected to the terminal of the electrical component. After the electrical component is externally connected to a power source, it provides drive current to the electromagnetic coil of the stator 21.

[0028] In this embodiment, the electrical component is a printed circuit board.

[0029] Specifically, the three output wires U1, V1, and W1 of the first coil group are led out along the axial direction of the corresponding outlet hole 51, and the front ends of the three output wires U1, V1, and W1 are electrically connected to the terminals of the electrical components. Similarly, the three output wires U2, V2, and W2 of the second coil group are led out along the axial direction of the corresponding outlet hole 51, and the front ends of the three output wires U2, V2, and W2 are electrically connected to the terminals of the electrical components.

Claims

[1] A motor comprising a shell, a stator, and a rotor, the stator having an output wire extending from an electromagnetic coil, the shell being provided with at least one outlet hole, and an insulated wire sleeve being provided within the outlet hole. The insulated wire sleeve is provided with at least one outlet hole, and the output wire is led out through the outlet hole to the outside of the shell and electrically connected to the electrical components outside the motor. characterized by that the insulation wire sleeve has the following: the head which, when inserted into the wire hole, is configured at one end of the axis direction of the wire hole; the body part configured on the opposite end side of the axis direction relative to the head near the lead hole; and the closure which, when inserted into the wire hole, is connected to the wire hole. [2] Engine according to claim 1, characterized by that the housing comprises a main shell having an open end and an end cover for blocking the opening and all wire holes are provided at one end of the main shell, away from the opening. [3] Engine according to claim 1, characterized by that the sheath comprises a main sheath having an end opening and an end cover for covering the opening and all wire holes are provided at the end cover. [4] Engine according to claim 3, characterized by that there are at least two closures. [5] Engine according to claim 4, characterized by that the closure is made of elastic material or an elastic structure made of a harder material. [6] Engine according to claim 5, characterized bythat the insulating wire sleeve is provided with a bypass groove and the closure is arranged within the bypass groove. [7] Engine according to one of claims 1 to 6, characterized by that the closure comprises a deformation part and a clamping part, wherein the clamping part is connected to the deformation part and extends at least partially beyond the outer contour of the insulating wire sleeve and the end of the clamping part is provided with an inclined surface. [8] Engine according to one of claims 1 to 6, characterized by that the insulating wire sleeve is arranged in a straight or arcuate shape with a cross-section perpendicular to its own axis. [9] A motor comprising a shell, a stator, and a rotor, the stator having an output wire led out from an electromagnetic coil, the shell being provided with a plurality of outlet holes, and an insulated wire barrel being provided inside the outlet hole. The insulated wire barrel is provided with at least one outlet hole, and the output wire is led out through the outlet hole to the outside and electrically connected to the external electrical components of the motor. The feature is that the periphery of the insulated wire barrel is provided with a contact ring. After the insulated wire barrel is installed in place, the surface of the contact ring facing outward in the axial direction is lower than the surface where the periphery of the contact hole facing outward in the axial direction is located. [10] Engine according to claim 9, characterized bythat the insulating wire sleeve is arranged in a straight or arcuate shape with a cross-section perpendicular to its own axis.

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