Motor busbar

Abstract

The utility model discloses a motor busbar, and belongs to the field of motors, and the motor busbar comprises an insulating base which is integrally formed through injection molding, a bus bar arranged on the insulating base, first protrusions of the insulating base and grooves formed between the first protrusions of the insulating base, an embedded space is provided for a main body part of the bus bar, and radial movement of the bus bar is limited. And a step surface formed by an upper side wide section and a lower side narrow section of the second bulge can be abutted against and contacted with the main body part after the bus bar is assembled. By limiting the displacement of the main body part in the z-axis, the bus bar is ensured not to be separated from the groove. And the clamping groove design of the third bulge further enhances the stability of the bus bar. After the bus bar is assembled, the connecting part of the bus bar is connected with the clamping groove in a matching manner, so that the bus bar can be prevented from rotating and axial displacement is limited when the bus bar is subjected to external force, the problem of possible looseness of the bus bar after the bus bar is assembled is solved, the stability and the safety of the connection of the bus bar are enhanced, and the normal operation and the use safety of the motor are ensured.

Description

Technical Field

[0001] The present application belongs to the field of motors, 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. Utility Model Content

[0004] The utility model provides a motor busbar, which is used to solve the problem that the busbar is installed in the insulating seat installation groove and may become loose under the influence of external impact or thermal expansion and contraction, causing the busbar to shift, reduce insulation performance, and increase the risk of current leakage or short circuit.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A motor busbar comprises an insulating base integrally formed by injection molding and a busbar arranged on the insulating base, wherein the busbar comprises an open annular main body and a plurality of connecting parts evenly distributed on the upper side of the main body for connecting the ends of motor windings, the insulating base is provided with a first protrusion, a second protrusion and a third protrusion, a groove for the main body to be embedded is formed between adjacent first protrusions, a plurality of the first protrusions are evenly spaced circumferentially, the second protrusions are arranged between circumferentially adjacent first protrusions, the second protrusions comprise 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, the third protrusion is provided with a slot, after the busbar is assembled, the step surface can abut against the main body, and the connecting part is connected with the slot in a matching manner.

[0007] The motor busbar of the present application, the setting of the first protrusion of the insulating base and the groove formed between them provide an embedding space for the main body of the busbar, limiting the radial movement of the busbar. This structural design enables the main body to be firmly embedded therein and not easy to shake. The unique design of the second protrusion, especially the step surface formed by the upper wide section and the lower narrow section, can abut and contact with 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 be separated from the groove by limiting the displacement of the main body in the z-axis. The slot design of the third protrusion further enhances the stability of the busbar. When the busbar is assembled, its connecting part is connected with the slot, which can not only prevent the busbar from rotating when subjected to external force, limit axial displacement, but also avoid the risks of current leakage or short circuit caused by looseness. The combined application of the first protrusion, the second protrusion and the third protrusion effectively solves the problem of loosening of the busbar after assembly, enhances the stability and safety of its connection, thereby ensuring the normal operation and safety of the motor.

[0008] In a preferred implementation, the cross-section of the second protruding wide section gradually widens from top to bottom.

[0009] The cross-sectional design of the wide section of the second protrusion gradually widens from top to bottom, which facilitates the installation of the busbar and further enhances its stability after installation, reducing damage or loosening caused by improper installation. Once the busbar is fully embedded in the groove, the step surface of the second protrusion will tightly abut against the upper end surface of the busbar. This abutment not only achieves installation positioning and ensures the stability of the busbar in the horizontal direction, but also further prevents the busbar from detaching from the groove by limiting its displacement in the z-axis.

[0010] In a preferred implementation, one of the spacings between the second protrusion and two radially adjacent first protrusions is equal to the width of the bus bar, and the other is greater than the width of the bus bar.

[0011] Ensure that the second protrusion has sufficient space to tilt so that its tilting is not hindered by the installed busbar.

[0012] In a preferred implementation, the end of the first protrusion is an arc transition surface.

[0013] The arc transition surface design 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 potential friction and damage risks, but also improves the convenience and efficiency of installation, helps to protect the integrity of the busbar, prolong its service life, and ensure the smooth progress of the entire installation process.

[0014] In a preferred implementation, the insulating base is provided with at least three bus bars, and main bodies of adjacent bus bars are arranged in grooves at intervals along the radial direction of the insulating base.

[0015] In a preferred implementation, the width of the groove is equal to the ring width of the main body.

[0016] 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.

[0017] By providing through holes on the insulating base, 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 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 through holes 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 works within a lower temperature range, improving its working efficiency and reliability.

[0018] In a preferred implementation, the heights of the first protrusion and the second protrusion are both higher than the height of the main body, and the height of the slot is higher than the heights of the first protrusion and the second protrusion.

[0019] The height of the first protrusion and the second protrusion 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. The height of the card slot is designed to be higher than the first protrusion and the second protrusion, avoiding the contact between adjacent busbars during installation. Due to the height advantage of the card slot, even if there is a slight deviation between adjacent busbars during installation, short circuits or other safety hazards will not be caused due to mutual contact. The electrical isolation between the busbars is enhanced, and the operating reliability of the entire motor system is also improved.

[0020] In a preferred implementation, the cross-section of the slot gradually narrows from top to bottom.

[0021] During installation, the busbar can slide in more easily along the wide side of the slot. As the cross-section gradually decreases, the fit between the busbar and the slot becomes tighter. Once the busbar is fully inserted into the slot, it will be difficult for the busbar to loosen or fall off due to the limitation of the narrowing cross-section, ensuring a firm and reliable connection between the busbar and the slot.

[0022] 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

[0023] 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 on the present invention. In the drawings:

[0024] Figure 1 A schematic structural diagram of an exemplary implementation of the present application is depicted;

[0025] Figure 2 This application is shown Figure 1 A schematic cross-sectional view of a schematic implementation scheme of part A;

[0026] Figure 3 A schematic diagram of a three-dimensional structure of an exemplary embodiment of the insulating base of the present application is depicted;

[0027] Figure 4 A schematic structural diagram of a schematic implementation scheme of the busbar of the present application is depicted;

[0028] Figure 5 A schematic diagram of a three-dimensional structure of a busbar connecting portion of the present application is depicted;

[0029] Figure 6 A schematic structural diagram of a schematic implementation scheme of a through hole of the present application is depicted;

[0030] Description of labels:

[0031] 1-insulating base; 10-first protrusion; 11-second protrusion; 110-wide section; 111-step surface; 12-third protrusion; 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

[0032] 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.

[0033] In the description of the present invention, it is necessary to understand that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the present invention, unless otherwise clearly specified and limited, a first feature being "upper" or "lower" than a second feature may be the first and second features directly contacting, or the first and second features indirectly contacting through an intermediate medium.

[0034] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are connected to form a whole only through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0035] In the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0036] The utility model is described below in conjunction with the accompanying drawings.

[0037] The specific plans adopted are:

[0038] like Figure 1-6As shown, the utility model provides a motor busbar, including an injection-molded integral insulating base 1 and a busbar 2 arranged on the insulating base 1, the busbar 2 includes an open ring-shaped main body 20 and a plurality of connecting parts 21 evenly distributed on the upper side of the main body for connecting the ends of the motor windings, the connecting part 21 includes a connecting section 210 and an extending section 211, the connecting section 210 is arranged on the main body, 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 a mounting part 22, the mounting part 22 is arranged on the main body avoiding the connecting part 21, and the mounting part 22 is used to connect the wiring terminal 23 of the motor.

[0039] The insulating base 1 is provided with a first protrusion 10, a second protrusion 11 and a third protrusion 12. A groove 13 for the main body to be embedded is formed between adjacent first protrusions 10. A plurality of first protrusions 10 are evenly spaced circumferentially. The second protrusion 11 is arranged between circumferentially adjacent first protrusions 10. The second protrusion 11 includes an upper wide section 110 and a lower narrow section. A step surface 111 is formed at the intersection of the wide section 110 and the narrow section. The third protrusion 12 is provided with a slot 120. After the busbar 2 is assembled, the step surface 111 can abut against the main body, and the connecting portion 21 is connected with the slot 120.

[0040] The motor busbar of the present application, the arrangement of the first protrusion 10 of the insulating base 1 and the groove 13 formed therebetween provide a space for the main body of the busbar 2 to be embedded. This structural design enables the main body 20 to be firmly embedded therein and not easily shaken. The unique design of the second protrusion 11, especially the step surface 111 formed by its upper wide section 110 and the lower narrow section, 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. The design of the slot 120 of the third protrusion 12 further enhances the stability of the busbar 2. When the busbar 2 is assembled, its connecting portion 21 is connected with the slot 120. This connection can not only prevent the busbar 2 from rotating when subjected to external force, but also avoid the risks of current leakage or short circuit caused by looseness. The combined application of the first protrusion 10, the second protrusion 11 and the third protrusion 12 effectively solves the problem of looseness of the busbar 2 after assembly, enhances the stability and safety of its connection, and thus ensures the normal operation and safe use of the motor.

[0041] As a preferred embodiment of the present application, the cross section of the wide section 110 of the second protrusion 11 gradually widens from top to bottom.

[0042] The cross-section of the wide section 110 of the second protrusion 11 is designed to gradually widen from top to bottom, for example Figure 2The triangular design is adopted in the embodiment of the present invention. This design not only facilitates the installation of the bus bar 2, but also further enhances its stability after installation.

[0043] Specifically, when installing the busbar 2, since the cross section of the wide section 110 is a gradually widening triangular design, the busbar 2 can contact the triangular slope of the narrow section to make it slightly tilted, and then easily enter the groove 13. This slope design makes the installation process smoother and reduces the damage or looseness caused by improper installation. Once the busbar 2 is completely embedded in the groove 13, the second protrusion 11 recovers its deformation, and the step surface 111 of the second protrusion 11 will be tightly abutted against the upper end surface of the busbar 2. This abutment not only realizes the installation positioning and ensures the stability of the busbar 2 in the horizontal direction, but also further prevents the busbar 2 from escaping from the groove 13 by limiting its displacement in the z-axis.

[0044] As a preferred embodiment of the present application, one of the spacings between the second protrusion 11 and two radially adjacent first protrusions 10 is equal to the width of the bus bar 2 , and the other is greater than the width of the bus bar 2 .

[0045] In order to ensure that the second protrusion 11 has enough tilting space and avoids its tilting being hindered by the installed busbar 2, the spacing between the second protrusion 11 and the two radially adjacent first protrusions 10 is designed. Among them, the size of one spacing is equal to the width of the busbar 2, and the other spacing is greater than the width of the busbar 2. Such a design is intended to ensure that the second protrusion 11 can tilt smoothly during the installation process, thereby successfully completing the installation of the busbar 2, while ensuring stability and reliability after installation.

[0046] As a preferred embodiment of the present application, the end of the first protrusion 10 is an arc transition surface.

[0047] The end of the first protrusion 10 is specially designed as an arc transition surface, and such a design is intended to ensure that when installing the busbar 2, the edge of the protrusion will not scratch the busbar 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 busbar 2, prolongs its service life, and ensures the smooth progress of the entire installation process.

[0048] As a preferred embodiment of the present application, the insulating base 1 is provided with at least three bus bars 2 , and 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 .

[0049] The three busbars 2 are U, V, and W phases, respectively. The main bodies of these adjacent busbars 2 are arranged in pre-formed grooves 13 at intervals along the radial direction of the insulating base 1. This ensures that each busbar 2 can be firmly installed on the insulating base 1, and the interference and short circuit risks between the busbars 2 of each phase are effectively avoided through the radial spacing.

[0050] As a preferred embodiment of the present application, the width of the groove 13 is equal to the ring width of the main body 20 .

[0051] When the width of the groove 13 is designed to be equal to the ring width of the main body, this matching 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.

[0052] 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.

[0053] 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.

[0054] As a preferred embodiment of the present application, the heights of the first protrusion 10 and the second protrusion 11 are both higher than the height of the main body, and the height of the slot 120 is higher than the heights of the first protrusion 10 and the second protrusion 11 .

[0055] The height of the first protrusion 10 and the second protrusion 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. The height of the slot 120 is designed to be higher than the first protrusion 10 and the second protrusion 11, 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.

[0056] As a preferred embodiment of the present application, the cross section of the card slot 120 gradually narrows from top to bottom.

[0057] During installation, the busbar 2 can more easily slide in along the wide side of the slot 120. As the cross-section gradually decreases, the fit between the busbar 2 and the slot 120 becomes tighter. Once the busbar 2 is fully inserted into the slot 120, due to the limitation of the narrowing cross-section, the busbar 2 will be difficult to loosen or fall off, ensuring that the connection between the busbar 2 and the slot 120 is firm and reliable.

[0058] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0059] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A motor busbar, comprising an insulating base formed integrally by injection molding and a busbar arranged on the insulating base, characterized in that: The busbar includes an open ring-shaped main body and a plurality of connecting parts evenly distributed on the upper side of the main body for connecting the ends of the motor windings. The insulating base is provided with a first protrusion, a second protrusion and a third protrusion. A groove for the main body to be embedded is formed between adjacent first protrusions. The plurality of first protrusions are evenly spaced circumferentially. The second protrusion is arranged between circumferentially adjacent first protrusions. The second protrusion 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. The third protrusion is provided with a slot. After the busbar is assembled, the step surface can abut against the main body, and the connecting part is connected in a mating manner with the slot.

2. The motor busbar according to claim 1, characterized in that: The cross section of the second raised wide section gradually widens from top to bottom.

3. The motor busbar according to claim 1, characterized in that: One of the spacings between the second protrusion and two radially adjacent first 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 first protrusion is an arc transition surface.

5. The motor busbar according to claim 1, characterized in that: The insulating base is provided with at least three bus bars, and the main bodies of adjacent bus bars are arranged in the grooves at intervals along the radial direction of the insulating base.

6. The motor busbar according to claim 1, characterized in that: The width of the groove is equal to the ring width of the main body.

7. The motor busbar according to claim 1, characterized in that: The insulating base is provided with a plurality of through holes to reduce the deadweight of the busbar and improve the heat dissipation effect.

8. The motor busbar according to claim 1, characterized in that: The heights of the first protrusion and the second protrusion are both higher than the height of the main body, and the height of the slot is higher than the heights of the first protrusion and the second protrusion.

9. The motor busbar according to claim 1, characterized in that: The cross section of the slot gradually narrows from top to bottom.

10. 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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