A motor bus

Abstract

The present application discloses a motor busbar, which belongs to the field of motor technology, and includes an injection-molded insulating base and a conductor busbar arranged on the insulating base. The insulating base is provided with a groove for the main body to be embedded, a limiter to prevent the main body from rotating circumferentially, and a restraint to prevent the main body from being separated from the groove. When assembling the busbar to the insulating base, the main body is abutted against the restraint before being embedded in the groove and tilted into the groove. Such a design simplifies the installation steps and improves the assembly efficiency. Compared with the traditional assembly method, this design reduces the steps that require precise alignment and fixation, making the installation process faster and more convenient. Once the main body is embedded in the groove, the restraint returns to the initial position to limit the main body from being separated from the groove. This design ensures a stable connection between the busbar and the insulating base, avoids loosening or falling off that may occur during the operation of the motor, and thus ensures the stable operation of the motor system.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and in particular, relates to a motor bus. Background Art

[0002] The motor bus is mainly responsible for connecting and distributing current in the motor, and is closely related to the coils in the motor stator. The structural design of the bus enables it to connect multiple coils to achieve centralized current distribution. Through its efficient conductivity, it transmits the current provided by the power supply to the coils in the motor stator to generate a rotating magnetic field, thereby achieving normal operation of the motor. In addition, the bus also has the function of protecting the motor windings from damage. Because it can provide lower resistance and better conductivity, it can reduce the electrical and thermal damage caused by current passing through the motor windings, thereby extending the service life of the motor.

[0003] The existing motor bus structure on the market usually includes two parts: an insulating seat and a bus bar. The insulating seat is an insulating part with a mounting groove on it, which plays the role of installing support and isolating the bus bar, while the bus bar is a conductor, which is used to connect the ends of the windings that need to be connected together in the multiple windings of the motor stator to achieve electrical connection and bus function. The bus bars on the bus need to be insulated to ensure that the current flows along a predetermined path to avoid problems such as short circuits. Compared with the use of connectors such as clamps to fix the bus bar, the bus bar is directly embedded in the mounting groove of the insulating seat. The assembly is simple and convenient and is more suitable for mass production. However, in the external impact, for example, the motor is subjected to impact and vibration from the external environment during operation, such as mechanical vibration, collision, etc. These impacts may cause the connection between the busbar and the insulation seat to loosen, or under the influence of thermal expansion and contraction, specifically, the motor generates heat during operation, causing the busbar and the insulation seat to expand and contract. Since their thermal expansion and contraction coefficients do not match, loosening may occur when the temperature changes. Loosening may cause the insulation material to break or the busbar to shift, thereby reducing the insulation performance and increasing the risk of current leakage or short circuit. This may not only affect the normal operation of the motor, but also cause safety hazards to users and equipment. It can be seen that the existing technology needs to be further improved and enhanced. Summary of the invention

[0004] The present invention provides a motor busbar to at least solve or alleviate one or more technical problems in the prior art, or at least provide a beneficial choice.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A motor busbar comprises an insulating base formed by injection molding and a conductor busbar arranged on the insulating base.

[0007] The busbar includes a main body and a plurality of connecting parts, wherein the connecting parts are evenly distributed on the upper side of the main body and are used to connect the motor winding ends;

[0008] The insulating base is provided with a groove for the main body to be embedded, a limiter to prevent the main body from rotating circumferentially, and a restraint to prevent the main body from being separated from the groove. The connecting portion is cooperatively connected with the limiter, and the restraint is arranged on the upper side of the groove. Before the main body is embedded in the groove, it abuts against the restraint to tilt it to enter the groove. After the main body is embedded in the groove, the restraint returns to the initial position to restrict the main body from being separated from the groove, so as to realize the assembly of the bus bar and the insulating base.

[0009] The motor bus of the present application, when assembling the busbar to the insulating base, allows the main body to abut against the restraining member before being embedded in the groove and tilt it into the groove. This design simplifies the installation steps and improves assembly efficiency. Compared with the traditional assembly method, this design reduces the steps that require precise alignment and fixation, making the installation process faster and more convenient. Once the main body is embedded in the groove, the restraining member returns to the initial position, effectively limiting the main body from detaching from the groove. This design ensures a firm connection between the busbar and the insulating base, avoids loosening or falling off that may occur during the operation of the motor, thereby ensuring the stable operation of the motor system. The setting of the limiter effectively prevents the main body from circumferential rotation in the groove. This fixing method not only enhances the stability of the structure, but also avoids poor electrical connection or damage caused by rotation, further improving the reliability and safety of the motor system.

[0010] In a preferred implementation, the insulating base is provided with protrusions, which are arranged at intervals along the circumferential and radial directions of the insulating base, and the groove is formed between radially adjacent protrusions. The restraint is arranged between circumferentially adjacent protrusions, and the restraint includes an upper wide section and a lower narrow section. A step surface is formed at the intersection of the wide section and the narrow section. After the busbar is assembled into the groove, the step surface can abut against the upper side of the main body to achieve positioning.

[0011] The setting of the protrusions on the insulating base and the grooves formed between them provide a space for the main body of the busbar to be embedded. This structural design allows the main body to be firmly embedded therein and not easily shaken. The unique design of the restraint, especially the step surface formed by the upper wide section and the lower narrow section, can abut against the main body after the busbar is assembled. This abutment not only enhances the stability of the connection, but also ensures that the busbar will not detach from the groove by limiting the displacement of the main body in the z-axis.

[0012] In a preferred implementation, the wide section of the restraint has an inclined surface, and the busbar abuts against the inclined surface to tilt the restraint.

[0013] The busbar can easily abut the inclined surface, tilt the restraint, and then smoothly enter the groove. The assembly process is simplified and the assembly efficiency is improved. When the busbar enters the groove, the restraint will return to its original position, effectively limiting the busbar from detaching from the upper side, ensuring the stability of the busbar after assembly.

[0014] In a preferred implementation, one of the spacings between the restraining member and two radially adjacent protrusions is equal to the width of the bus bar, and the other is greater than the width of the bus bar.

[0015] The setting of different spacings ensures that the busbar can be smoothly restrained between the protrusion and the restraint member during assembly and abut against the inclined surface of the restraint member. The spacing between the restraint member surface away from the inclined surface and the protrusion is greater than the width of the busbar in order to provide sufficient space for the restraint member to tilt smoothly under the abutment of the busbar, so that the busbar can smoothly enter the groove, avoiding assembly difficulties or damage caused by insufficient space.

[0016] In a preferred implementation, the end of the protrusion is an arc transition surface.

[0017] The arc transition surface ensures that the raised edge will not scratch the busbar when installing the busbar. The arc transition surface is not only smooth and fluent, reducing the potential risk of friction and damage, but also improves the convenience and efficiency of installation and helps protect the integrity of the busbar.

[0018] In a preferred implementation, the main body is interference fit with the groove.

[0019] In a preferred implementation, the insulating base is provided with a plurality of through holes to reduce the deadweight of the busbar and improve the heat dissipation effect.

[0020] By providing through holes on the insulating base, the weight of the entire busbar structure can be effectively reduced, making the busbar more convenient to install and remove, reducing the difficulty of operation, and secondly, these through holes can also play a good role in heat dissipation.

[0021] In a preferred implementation, the through hole is arranged between circumferentially adjacent protrusions avoiding the restraining member.

[0022] The through holes are arranged between the circumferentially adjacent protrusions, which fully utilizes the space between the protrusions, makes the layout more reasonable, and makes the whole structure more compact.

[0023] In a preferred implementation, the heights of the protrusion and the restraint are higher than the height of the main body, the limiting member is provided with a slot, the height of the slot is higher than the heights of the protrusion and the limiting member, and the cross-section of the slot gradually narrows from top to bottom.

[0024] The height of the protrusions and restraints on the insulating base are designed to be higher than the height of the busbar body. This design ensures that the busbar can be firmly embedded in the corresponding groove during installation, and the height of the slot is designed to be higher than the protrusions and limiters, avoiding the contact between adjacent busbars during installation. Due to the height advantage of the slot, even if there is a slight deviation between adjacent busbars during installation, short circuits or other safety hazards will not occur due to mutual contact. The electrical isolation between the busbars is enhanced, and the operating reliability of the entire motor system is also improved.

[0025] In a preferred implementation, the connecting portion includes a connecting section and an extending section, the connecting section is arranged on the main body, the extending section is connected to the connecting section, the end of the extending section is bent to form a matching area, and the motor winding extends into the matching area to connect with the extending section. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 A schematic structural diagram of an exemplary implementation of the present application is depicted;

[0028] Figure 2 This application is shown Figure 1 A schematic cross-sectional view of a schematic implementation scheme of part A;

[0029] Figure 3 A schematic diagram of a three-dimensional structure of an exemplary embodiment of the insulating base of the present application is depicted;

[0030] Figure 4 A schematic structural diagram of a schematic implementation scheme of the busbar of the present application is depicted;

[0031] Figure 5 A schematic diagram of a three-dimensional structure of a busbar connecting portion of the present application is depicted;

[0032] Figure 6 A schematic structural diagram of a schematic implementation scheme of a through hole of the present application is depicted;

[0033] Description of labels:

[0034] 1-insulating base; 10-protrusion; 11-restraint; 110-wide section; 111-step surface; 112-narrow section; 12-limiting member; 120-slot; 13-groove; 14-through hole; 2-busbar; 20-main body 21-connecting part; 210-connecting section; 211-extension section; 212-matching area; 22-installation part; 23-connecting terminal. DETAILED DESCRIPTION

[0035] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0036] The present invention will be described below in conjunction with the accompanying drawings.

[0037] The specific plans adopted are:

[0038] like Figure 1-6 As shown, the present invention provides a motor busbar, comprising an injection-molded integral insulating base 1 and a conductor busbar 2 arranged on the insulating base 1;

[0039] The busbar 2 includes a main body 20 and a plurality of connecting parts 21. The connecting parts 21 are evenly distributed on the upper side of the main body for connecting the ends of the motor windings. The connecting parts 21 include a connecting section 210 and an extending section 211. The connecting section 210 is arranged on the main body, and the extending section 211 is connected to the connecting section 210. The end of the extending section 211 is bent to form a matching area 212. The motor winding extends into the matching area 212 and is connected to the extending section 211. The main body is also provided with an installation part 22. The installation part 22 is arranged on the main body avoiding the connecting part 21. The installation part 22 is used to connect the wiring terminal 23 of the motor.

[0040] The insulating base 1 is provided with a groove 13 for the main body to be embedded, a limiter 12 for preventing the main body from rotating circumferentially, and a restraining member 11 for preventing the main body from being separated from the groove 13. The connecting portion 21 is cooperatively connected with the limiter 12. The restraining member 11 is arranged on the upper side of the groove 13. Before the main body is embedded in the groove 13, it abuts against the restraining member 11 to tilt it so as to enter the groove 13. After the main body is embedded in the groove 13, the restraining member 11 returns to the initial position to restrict the main body from being separated from the groove 13. The insulating base 1 is provided with at least three bus bars 2, which are U, V, and W phases respectively. The main bodies of adjacent bus bars 2 are arranged in the groove 13 at intervals along the radial direction of the insulating base 1 to realize the assembly of the bus bars 2 and the insulating base 1.

[0041] The motor bus of the present application, when assembling the busbar 2 to the insulating base 1, allows the main body to abut against the restraining member 11 before being embedded in the groove 13 and tilt it into the groove 13. This design simplifies the installation steps and improves the assembly efficiency. Compared with the traditional assembly method, this design reduces the steps that require precise alignment and fixation, making the installation process faster and more convenient. Once the main body is embedded in the groove 13, the restraining member 11 returns to the initial position, effectively limiting the main body from being separated from the groove 13. This design ensures a firm connection between the busbar 2 and the insulating base 1, avoids loosening or falling off that may occur during the operation of the motor, thereby ensuring the stable operation of the motor system. The setting of the limiter 12 effectively prevents the main body from circumferentially rotating in the groove 13. This fixing method not only enhances the stability of the structure, but also avoids poor electrical connection or damage caused by rotation, further improving the reliability and safety of the motor system.

[0042] As a preferred embodiment of the present application, the insulating base 1 is provided with protrusions 10, which are arranged at intervals in the circumferential and radial directions of the insulating base 1, and grooves 13 are formed between radially adjacent protrusions 10. The restraint 11 is arranged between the circumferentially adjacent protrusions 10, and the restraint 11 includes an upper wide section 110 and a lower narrow section 112. A step surface 111 is formed at the intersection of the wide section 110 and the narrow section 112. After the busbar 2 is assembled into the groove 13, the step surface 111 can abut against the upper side of the main body to achieve positioning.

[0043] The arrangement of the protrusions 10 of the insulating base 1 and the grooves 13 formed therebetween provide a space for the main body of the busbar 2 to be embedded. This structural design allows the main body 20 to be firmly embedded therein and not easily shaken. The unique design of the restraint 11, especially the step surface 111 formed by the upper wide section 110 and the lower narrow section 112, can abut against the main body after the busbar 2 is assembled. This abutment not only enhances the stability of the connection, but also ensures that the busbar 2 will not detach from the groove 13 by limiting the displacement of the main body in the z-axis.

[0044] See also Figure 2 The wide section 110 of the restraint 11 has an inclined surface, and the busbar 2 abuts against the inclined surface to tilt the restraint 11. The busbar 2 can easily abut against the inclined surface to tilt the restraint 11, and then smoothly enter the groove 13. The assembly process is simplified and the assembly efficiency is improved. After the busbar 2 enters the groove 13, the restraint 11 will return to its original position, effectively limiting the busbar 2 from detaching from the upper side, ensuring the stability of the busbar 2 after assembly, and reducing the risk of falling off due to vibration or other external forces.

[0045] In order to ensure that the restraining member 11 has enough tilting space, in this embodiment, one of the spacings between the restraining member 11 and two radially adjacent protrusions 10 is equal to the width of the busbar 2 , and the other is greater than the width of the busbar 2 .

[0046] Specifically, the spacing between the restraint 11 and the two radially adjacent protrusions 10 is designed to take into account the width of the busbar 2 and to reserve sufficient tilting space. First, the spacing between the restraint 11 surface close to the inclined surface and the protrusion 10 is equal to the width of the busbar 2, so as to ensure that the busbar 2 can be smoothly restrained between the protrusion 10 and the restraint 11 during assembly, and abut against the inclined surface of the restraint 11. The spacing between the restraint 11 surface away from the inclined surface and the protrusion 10 is greater than the width of the busbar 2, in order to provide sufficient space for the restraint 11 to tilt smoothly under the abutment of the busbar 2, so that the busbar 2 can smoothly enter the groove 13, avoiding assembly difficulties or damage caused by insufficient space.

[0047] In addition, the end of the protrusion 10 is an arc transition surface, and the end of the protrusion 10 is specially designed as an arc transition surface, the purpose of which is to ensure that when installing the bus bar 2, the edge of the protrusion 10 will not scratch the bus bar 2. The arc transition surface is not only smooth and fluent, reducing potential friction and damage risks, but also improves the convenience and efficiency of installation, helps to protect the integrity of the bus bar 2, prolongs its service life, and ensures the smooth progress of the entire installation process.

[0048] Furthermore, when the main body and the groove 13 are interference-fitted, that is, the width of the groove 13 is designed to be equal to or less than the ring width of the main body, this design ensures the stability and accuracy of the main body during installation. The main body can be smoothly and tightly embedded in the groove 13, and the problem of shaking or improper installation caused by size mismatch is reduced. By ensuring a tight fit between the groove 13 and the main body, this design effectively prevents the displacement or loosening of the main body after installation, thereby improving the stability and reliability of the entire structure.

[0049] As a preferred embodiment of the present application, the insulating base 1 is provided with a plurality of through holes 14 to reduce the deadweight of the busbar and improve the heat dissipation effect.

[0050] By providing through holes 14 on the insulating base 1, the weight of the entire bus structure can be effectively reduced. This makes the bus more convenient to install and remove, and reduces the difficulty of operation. Secondly, these through holes 14 can also play a good role in heat dissipation. During the operation of the motor, the bus will generate a certain amount of heat. If this heat cannot be dissipated in time, it may cause the bus temperature to rise, thereby affecting its performance and safety. The presence of the through holes 14 can effectively increase the contact area between the bus and the surrounding air, accelerate the convection and radiation loss of heat, thereby ensuring that the bus always operates within a lower temperature range, and improving its working efficiency and reliability.

[0051] Specifically, the through hole 14 is arranged between the circumferentially adjacent protrusions 10 avoiding the restraining member 11. Considering the structural strength, the through hole 14 is arranged between the circumferentially adjacent protrusions 10, which makes full use of the space between the protrusions 10 and avoids the restraining member 11 that may affect the structural strength. Such a layout makes the entire structure more compact, while also reducing unnecessary material usage and reducing costs.

[0052] In order to ensure that there is no contact between the busbars 2, the heights of the protrusions 10 and the restraints 11 are higher than the height of the main body, and the limiting member 12 is provided with a slot 120. The height of the slot 120 is higher than the heights of the protrusions 10 and the limiting member 12, and the cross-section of the slot 120 gradually narrows from top to bottom.

[0053] The height of the protrusion 10 and the restraining member 11 on the insulating base 1 are designed to be higher than the height of the main body of the busbar 2. This design ensures that the busbar 2 can be firmly embedded in the corresponding groove 13 during the installation process, and the height of the slot 120 is designed to be higher than the protrusion 10 and the limiting member 12, avoiding the contact between adjacent busbars 2 during the installation process. Due to the height advantage of the slot 120, even if there is a slight deviation between adjacent busbars 2 during installation, short circuits or other safety hazards will not be caused due to mutual contact. The electrical isolation between the busbars 2 is enhanced, and the operating reliability of the entire motor system is also improved.

[0054] Anything not described in the present invention can be achieved by adopting or drawing on existing technologies.

[0055] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A motor busbar, comprising an injection-molded integral insulating base and a conductor busbar arranged on the insulating base, characterized in that: The busbar includes a main body and a plurality of connecting parts, wherein the connecting parts are evenly distributed on the upper side of the main body and are used to connect the motor winding ends; The insulating base is provided with a groove for the main body to be embedded, a limiter to prevent the main body from rotating in the circumferential direction, and a restraint to prevent the main body from being separated from the groove. The connecting portion is connected with the limiter in cooperation. The restraint is provided on the upper side of the groove. Before the main body is embedded in the groove, it abuts against the restraint to tilt it so as to enter the groove. After the main body is embedded in the groove, the restraint returns to the initial position to restrict the main body from being separated from the groove, so as to realize the assembly of the busbar and the insulating base. The insulating base is provided with protrusions, which are arranged at intervals along the circumferential direction and radial direction of the insulating base, and the groove is formed between radially adjacent protrusions. The restraining member is arranged between circumferentially adjacent protrusions, and the restraining member includes an upper wide section and a lower narrow section. A step surface is formed at the intersection of the wide section and the narrow section. After the busbar is assembled into the groove, the step surface can abut against the upper side of the main body to achieve position limiting; The insulating base is provided with a plurality of through holes to reduce the deadweight of the busbar and improve the heat dissipation effect; The through hole is arranged between circumferentially adjacent protrusions avoiding the restraining member.

2. The motor busbar according to claim 1, characterized in that: The wide section of the restraining member has an inclined surface, and the bus bar abuts against the inclined surface to make the restraining member tilt.

3. The motor busbar according to claim 1, characterized in that: One of the spacings between the restraining member and two radially adjacent protrusions is equal to the width of the bus bar, and the other is greater than the width of the bus bar.

4. The motor busbar according to claim 1, characterized in that: The end of the protrusion is an arc transition surface.

5. The motor busbar according to claim 1, characterized in that: The main body is interference fit with the groove.

6. The motor busbar according to claim 1, characterized in that: The heights of the protrusion and the restraining member are both higher than the height of the main body, the limiting member is provided with a slot, the height of the slot is higher than the heights of the protrusion and the limiting member, and the cross-section of the slot gradually narrows from top to bottom.

7. The motor busbar according to claim 1, characterized in that: The connecting portion comprises a connecting section and an extending section. The connecting section is arranged on the main body. The extending section is connected to the connecting section. The end of the extending section is bent to form a matching area. The motor winding extends into the matching area and is connected to the extending section.

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