Stator structure of brushless motor

Abstract

The utility model provides a stator structure of a brushless motor, which comprises a busbar assembly, an insulating framework and a clamping structure, the busbar assembly and the insulating framework are sequentially arranged from top to bottom, the clamping structure is arranged between the busbar assembly and the insulating framework, the clamping structure comprises a plurality of clamping jaws arranged in the circumferential direction of the busbar assembly, and the clamping jaws are arranged in the circumferential direction of the busbar assembly. And the plurality of clamping seats are arranged in the circumferential direction of the insulating framework, and each clamping claw is clamped on the corresponding clamping seat. According to the stator structure of the brushless motor, when the busbar assembly is assembled, the busbar assembly can be clamped on the insulation framework through the clamping structure, the busbar assembly is fixed, displacement of the busbar assembly during welding is avoided, and the production quality of the brushless motor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to brushless motor technical field, especially a kind of stator structure of brushless motor. BACKGROUND

[0002] The stator structure of brushless motor is the important component of motor, responsible for generating magnetic field and driving rotor rotation.The stator of brushless motor includes insulating framework, stator coil wound on insulating framework, and busbar assembly and other components, wherein during assembly, insulating framework is fixedly assembled on stator core, then busbar assembly is installed, after adjusting busbar assembly, busbar assembly is welded.

[0003] And busbar assembly is welded, is easily subjected to axial and circumferential direction external force, position changes, affect the assembly of brushless motor, lead to the stress concentration of the busbar assembly of brushless motor, cause certain damage to busbar, cause poor contact, even increase short-circuit risk, reduce the production quality of brushless motor. SUMMARY

[0004] Therefore, the utility model aims at providing a kind of stator structure of brushless motor to solve the problem that busbar assembly is easily affected by external force during assembly.

[0005] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0006] A kind of stator structure of brushless motor, including the busbar assembly and the insulating framework arranged in sequence up and down, and the clamping structure between the busbar assembly and the insulating framework;

[0007] The clamping structure includes a plurality of clamping claws arranged in the circumferential direction of the busbar assembly, and a plurality of clamping seats arranged in the circumferential direction of the insulating framework, each clamping claw is clamped on the corresponding clamping seat.

[0008] Further, the clamping claw includes a connecting seat arranged on the busbar assembly, a clamping rod arranged outside the connecting seat and arranged downward along the axial direction of the motor, and a clamping head arranged inside the lower end of the clamping rod and clamped with the clamping seat.

[0009] Further, the insulating framework includes a plurality of framework assemblies arranged in the circumferential direction of the motor axis, and each stator coil is wound on each framework assembly.

[0010] Further, each framework assembly includes an upper framework unit and a lower framework unit arranged in sequence and connected with each other, and each upper framework unit is provided with a clamping seat for clamping with the clamping head.

[0011] Further, the upper skeleton unit comprises a first support plate, and two first connecting plates arranged at two ends of the first support plate and downward along the axial direction of the motor, and the clamping seat is arranged outside the first support plate.

[0012] The lower skeleton unit comprises a second support plate, and two second connecting plates arranged at two ends of the second support plate and upward along the axial direction of the motor, and upper ends of the two second connecting plates are connected with lower ends of the two first connecting plates respectively.

[0013] Further, the first support plate is provided with a first upper baffle and a second upper baffle outside and inside respectively, and the clamping seat is arranged outside the second upper baffle.

[0014] The second support plate is provided with a first lower baffle and a second lower baffle outside and inside respectively, and the first upper baffle, the second upper baffle, the first lower baffle and the second lower baffle are provided with wire laying grooves for laying the stator coils.

[0015] Further, the second upper baffle is provided with a guide part for clamping the clamping head on the clamping seat outside along the axial direction of the motor.

[0016] Further, each of the first connecting plates and / or each of the second connecting plates is provided with wire guide grooves along the axial direction of the motor, and the wire guide grooves are spaced apart outside and inside.

[0017] Further, the second upper baffle is provided with a wire harness avoiding groove inside.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The stator structure of the brushless motor comprises a clamping structure arranged between the busbar assembly and the insulating skeleton, so that the busbar assembly can be firmly fixed on the insulating skeleton, and the position of the busbar assembly is prevented from being changed after being subjected to external force during welding, the design of the plurality of clamping claws and the clamping seat can provide multi-point fixing, the stability of the busbar assembly in each direction is ensured, and the production quality of the brushless motor is improved.

[0020] The structure of the clamping claw is relatively simple, easy to manufacture and mass produce, reduces the manufacturing cost, improves the production efficiency, and the clamping claw and the busbar assembly are designed in an integral manner, so that the stability between the busbar assembly and the insulating skeleton is ensured in a high-vibration and high-stress environment.

[0021] And, the plurality of framework assemblies are uniformly distributed in the circumferential direction, can provide multi-point support, the uniformly distributed framework assemblies can also disperse the vibration and stress generated in the motor operation process, reduce the problem of local excessive stress, ensure the overall mechanical stability of the insulation framework, and the stator coil wound on the plurality of framework assemblies can ensure the uniform distribution of the magnetic field in the circumferential direction, improve the magnetic field quality and operation efficiency of the motor.

[0022] Secondly, the framework assembly is composed of the upper framework unit and the lower framework unit, can provide necessary support for the stator coil of the motor, ensure the stability and reliability of the coil under the action of the electromagnetic field, and the framework assembly adopts a split design, can simplify the production process, reduce the manufacturing difficulty, and improve the production efficiency.

[0023] In addition, the N-shaped upper framework unit and the U-shaped lower framework unit can enhance the rigidity of the framework unit, reduce vibration and deformation during operation, and the upper framework unit and the lower framework unit can provide a stable support platform for the stator coil and other components, ensure that they remain fixed and stable during motor operation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application and are incorporated herein for explanation by way of non-limitation. In the drawings:

[0025] Figure 1 A structure schematic view of the brushless motor stator structure according to an embodiment of the present application;

[0026] Figure 2 A structure schematic view of the clamping structure according to an embodiment of the present application;

[0027] Figure 3 A structure schematic view of the framework assembly according to an embodiment of the present application;

[0028] Figure 4 A structure schematic view of the upper framework unit according to an embodiment of the present application;

[0029] Figure 5 A structure schematic view of the lower framework unit according to an embodiment of the present application;

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 1, busbar assembly;

[0032] 2, insulation framework; 21, framework assembly; 211, upper framework unit; 2111, first support plate; 2112, first connecting plate; 2113, first upper baffle; 2114, second upper baffle; 2115, guide part;

[0033] 212, lower skeleton unit; 2121, second support plate; 2122, second connecting plate; 2123, first lower baffle; 2124, second lower baffle;

[0034] 3, clamping structure; 301, clamping jaw; 3011, connecting seat; 3012, clamping rod; 3013, clamping head; 302, clamping seat;

[0035] 4, stator coil; 401, wire resting groove;

[0036] 5, wire groove;

[0037] 6, avoiding groove. DETAILED DESCRIPTION

[0038] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0039] In the description of the utility model, it should be noted that if the terms indicating the orientation or position relationship such as "upper", "lower", "inner", "outer" appear, the orientation or position relationship shown in the drawing is based on, only for the convenience of describing the utility model and simplifying the description, and it is not indicated or implied that the device or element must have a specific orientation, a specific orientation and operation, therefore, it cannot be understood as a limitation of the utility model. In addition, if the terms "first", "second" appear, they are also used for description purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the utility model, unless otherwise explicitly limited, the terms "mounting", "connecting", "connecting", "connecting piece" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood in combination with the specific circumstances.

[0041] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] The embodiment relates to a stator structure of a brushless motor, and the busbar assembly 1 and the insulating skeleton 2 support are connected through the clamping structure 3, and the fixing effect of the busbar assembly 1 is good.

[0043] On the whole structure, such as Figures 1 to 5As shown, the stator structure of the brushless motor of the embodiment includes the busbar assembly 1, the insulating framework 2 and the clamping structure 3. Among them, the busbar assembly 1 and the insulating framework 2 are arranged in sequence from top to bottom, and the clamping structure 3 is arranged between the busbar assembly 1 and the insulating framework 2. The clamping structure 3 includes a plurality of clamping claws 301 arranged in the circumferential direction of the busbar assembly 1, and a plurality of clamping seats 302 arranged in the circumferential direction of the insulating framework 2. Each clamping claw 301 is clamped on the corresponding clamping seat 302.

[0044] At this time, as arranged above, the clamping structure 3 is arranged between the busbar assembly 1 and the insulating framework 2, which can ensure that the busbar assembly 1 is firmly fixed on the insulating framework 2, avoiding the position of the busbar assembly 1 from changing during welding, causing certain damage to the busbar assembly. The design of the plurality of clamping claws 301 and clamping seats 302 can provide multi-point fixing, ensuring the stability of the busbar assembly 1 in all directions. The close fit of the clamping claw 301 and the clamping seat 302 can effectively prevent the connection between the busbar assembly 1 and the stator coil 4 from loosening, reduce the poor contact caused by loosening, improve the efficiency and stability of current transmission, and reduce the risk of short circuit. In addition, the above arrangement can also simplify the installation process of the busbar assembly 1, save assembly time and cost, make replacement or maintenance more convenient, and prolong the service life of the motor.

[0045] In addition, in the embodiment, as a preferred implementation form, referring to Figure 2 As shown, the clamping claw 301 includes a connecting seat 3011 arranged on the busbar assembly 1, a clamping rod 3012 arranged on the outer side of the connecting seat 3011 and arranged downward along the axial direction of the motor, and a clamping head 3013 arranged on the inner side of the lower end of the clamping rod 3012 and clamped with the clamping seat 302. The structure of the clamping claw 301 is simple, easy to manufacture and mass production, reduces the manufacturing cost, and the clamping claw 301 can be designed in one piece with the busbar assembly 1, reducing the assembly steps, simplifying the production process, improving the production efficiency, and the one-piece design can enhance the structural strength between the clamping claw 301 and the busbar assembly 1, ensuring that it remains stable in a high-vibration and high-stress environment, and ensuring the stability between the busbar assembly 1 and the insulating framework 2.

[0046] In addition, in the embodiment, as a preferred implementation form, referring to Figure 2 As shown, the insulating framework 2 includes a plurality of framework assemblies 21 arranged in the circumferential direction of the motor axis, and the stator coil 4 is arranged on each framework assembly 21. The plurality of framework assemblies 21 are uniformly distributed in the circumferential direction, which can provide multi-point support. The uniformly distributed framework assemblies 21 can also disperse the vibration and stress generated during the operation of the motor, reduce the problem of uneven local stress, and ensure the overall mechanical stability of the insulating framework 2.

[0047] The stator coils 4 arranged on the plurality of skeleton assemblies 21 can ensure uniform distribution of the magnetic field in the circumferential direction, improve the magnetic field quality and operating efficiency of the motor. Moreover, the stator coils 4 on each skeleton assembly 21 can be independently cooled, reducing the accumulation of heat in local areas and improving the overall cooling effect. The design of the plurality of skeleton assemblies 21 makes the insulation skeleton 2 have the characteristics of modularity, which can be manufactured and assembled separately, thereby enabling batch production of each skeleton assembly 21, improving production efficiency, simplifying the production process, and reducing manufacturing costs. In addition, when a skeleton assembly 21 or a stator coil 4 malfunctions, it can be replaced individually, improving the convenience of maintenance.

[0048] Secondly, in this embodiment, as a preferred implementation form, referring to Figure 2 As shown in the figure, each skeleton assembly 21 includes an upper skeleton unit 211 and a lower skeleton unit 212 arranged above and below and connected to each other, and each upper skeleton unit 211 is provided with a clamping seat 302 for clamping with the clamping head 3013. The skeleton assembly 21 is composed of the upper skeleton unit 211 and the lower skeleton unit 212, which can provide the necessary support for the stator coils 4 of the motor, ensuring the stability and reliability of the coils under the action of the electromagnetic field. Moreover, the skeleton assembly 21 adopts a split design, and the integrated skeleton assembly 21 has a more complex structure, which requires higher precision or more complex equipment for production, making the manufacturing difficult. Relatively speaking, the split design can simplify the production process, reduce the manufacturing difficulty, and improve the production efficiency.

[0049] Specifically, the upper skeleton unit 211 can be connected to the lower skeleton unit 212 in a clamping or plug-in manner, so that it forms a solid whole, enhances the stability of the motor structure, reduces vibration and deformation during operation, better resists external impact and vibration, and improves the reliability and life of the motor in harsh environments. Moreover, the upper skeleton unit 211 and the lower skeleton unit 212 can be connected in a clamping or plug-in manner, making the assembly process more simple and fast, without the need for additional tools or fasteners, reducing assembly complexity, reducing assembly time and cost, and improving production efficiency.

[0050] Furthermore, in this embodiment, as a preferred implementation form, referring to Figure 2As shown, the upper skeleton unit 211 includes a first support plate 2111, and two first connecting plates 2112 arranged at both ends of the first support plate 2111 and downward along the motor axis, and the clamping seat 302 is arranged outside the first support plate 2111. The lower skeleton unit 212 includes a second support plate 2121, and two second connecting plates 2122 arranged at both ends of the second support plate 2121 and upward along the motor axis, and the upper ends of the two second connecting plates 2122 are connected with the lower ends of the two first connecting plates 2112 respectively. The first support plate 2111 and the two first connecting plates 2112 form the N-shaped upper skeleton unit 211, and the second support plate 2121 and the two second connecting plates 2122 form the U-shaped lower skeleton unit. The N-shaped upper skeleton unit 211 and the U-shaped lower skeleton unit 212 can enhance the rigidity of the skeleton unit, reduce vibration and deformation during operation, and the upper skeleton unit 211 and the lower skeleton unit 212 can provide a stable support platform for the stator coil 4 and other components, ensuring fixation and stability during motor operation.

[0051] It should be noted that, in this embodiment, as a preferred implementation form, referring to Figure 2 As shown, the inner side and the outer side of the first support plate 2111 are respectively provided with a first upper baffle 2113 and a second upper baffle 2114, and the clamping seat 302 is arranged outside the second upper baffle 2114. The inner side and the outer side of the second support plate 2121 are respectively provided with a first lower baffle 2123 and a second lower baffle 2124, and the first upper baffle 2113, the second upper baffle 2114, the first lower baffle 2123 and the second lower baffle are provided with a wire resting groove 401 for resting the stator coil 4. The first upper baffle 2113 and the first lower baffle 2123 can prevent the stator coil 4 from moving inward, and the second upper baffle 2114 and the second lower baffle 2124 can prevent the stator coil 4 from moving outward. The design of the wire resting groove 401 can accurately position the stator coil 4, avoid interference or short circuit between the coils, and improve the electromagnetic performance of the motor.

[0052] In addition, the first upper baffle 2113, the second upper baffle 2114, the first lower baffle 2123 and the second lower baffle can further increase the structural rigidity of the upper skeleton unit 211 and the lower skeleton unit 212, so that the overall structure is more solid and can withstand greater mechanical stress and vibration, improving the reliability and life of the motor.

[0053] It should be noted that, in this embodiment, as a preferred implementation form, referring to Figure 2As shown, the second upper baffle 2114 is provided with a guide portion 2115 outside along the axial direction of the motor for clamping the clamping seat 302. The design of the guide portion 2115 can quickly guide the clamping head 3013 to align with the clamping seat 302, reduce the positioning error in the assembly process, ensure that the clamping head 3013 can be accurately clamped into the clamping seat 302, simplify the assembly process, and improve the assembly accuracy and consistency. Under the guidance of the guide portion 2115, the assembler can complete the connection of the clamping head 3013 and the clamping seat 302 more quickly, reducing the assembly time and cost, and also facilitating the realization of an automatic production line, further improving the production efficiency and consistency.

[0054] In addition, in this embodiment, as a preferred implementation form, referring to Figure 2 As shown, each first connecting plate 2112 and / or each second connecting plate 2122 is provided with a wire slot 5 along the axial direction of the motor, and a plurality of wire slots 5 are arranged from the inside to the outside. The wire slot 5 can quickly guide the winding path of the coil, avoid the gap between adjacent coils being too small or the coils having no fixed sequence when winding, and reduce the positioning error in the assembly process. The wire slot 5 can also limit the winding path of the wire harness of the stator coil 4, ensure that each turn of the coil is arranged according to the predetermined path, and the arrangement is more uniform, optimize the magnetic field distribution, avoid the crossing and confusion between the coils, and improve the electromagnetic performance of the motor. The accurate coil arrangement can reduce the eddy current loss, improve the utilization rate of the skeleton winding space, and further improve the efficiency and performance of the motor.

[0055] It is worth mentioning that, in this embodiment, as a preferred implementation form, referring to Figure 2 As shown, the second upper baffle 2114 is provided with an avoidance slot 6 inside for the wire harness to pass through. When winding the wire harness, the first end of the wire harness can be placed in the avoidance slot 6, and then the stator coil 4 is wound according to the predetermined path, which can avoid the first end of the wire harness being pressed between the stator coil 4 and the second upper baffle, causing the wire harness to be deformed or scraped, causing the risk of short circuit of the brushless motor, and prolonging the service life of the wire harness. The wire slot and the avoidance slot on the insulating skeleton can improve the space utilization of the stator winding, improve the performance and reliability of the brushless motor while improving the yield of the brushless motor.

[0056] The stator structure of the brushless motor of the embodiment connects the bus bar assembly 1 and the insulating skeleton 2 support through the clamping structure 3, avoids the shaking of the bus bar assembly 1 when welding the bus bar assembly 1, makes the fixing effect of the bus bar assembly 1 good, reduces the short circuit risk of the motor, and prolongs the service life of the motor.

[0057] The above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A stator structure of a brushless motor, characterized in that: comprising a busbar assembly (1) and an insulating framework (2) arranged in sequence from top to bottom, and a clamping structure (3) arranged between the busbar assembly (1) and the insulating framework (2); the clamping structure (3) comprises a plurality of clamping claws (301) arranged in the circumferential direction of the busbar assembly (1), and a plurality of clamping seats (302) arranged in the circumferential direction of the insulating framework (2), each clamping claw (301) is clamped on the corresponding clamping seat (302); the clamping claw (301) comprises a connecting seat (3011) arranged on the busbar assembly (1), a clamping rod (3012) arranged outside the connecting seat (3011) and arranged downward along the axial direction of the motor, and a clamping head (3013) arranged inside the lower end of the clamping rod (3012) and clamped with the clamping seat (302); the insulating framework (2) comprises a plurality of framework assemblies (21) arranged in the circumferential direction of the motor axis, and a stator coil (4) is arranged around each framework assembly (21); each framework assembly (21) comprises an upper framework unit (211) and a lower framework unit (212) arranged in sequence and connected with each other, and each upper framework unit (211) is provided with a clamping seat (302) outside for clamping with the clamping head (3013). 2.A brushless motor stator structure according to claim 1, characterized in that: the upper framework unit (211) comprises a first support plate (2111), and two first connecting plates (2112) arranged downward along the axial direction of the motor at both ends of the first support plate (2111), and the clamping seat (302) is arranged outside the first support plate (2111); the lower framework unit (212) comprises a second support plate (2121), and two second connecting plates (2122) arranged upward along the axial direction of the motor at both ends of the second support plate (2121), and the upper ends of the two second connecting plates (2122) are connected with the lower ends of the two first connecting plates (2112) respectively. 3.A brushless motor stator structure according to claim 2, characterized in that: the first support plate (2111) is provided with a first upper baffle (2113) and a second upper baffle (2114) inside and outside respectively, and the clamping seat (302) is arranged outside the second upper baffle (2114); the second support plate (2121) is provided with a first lower baffle (2123) and a second lower baffle (2124) inside and outside respectively, and a wire resting groove (401) for resting the stator coil (4) is arranged between the first upper baffle (2113), the second upper baffle (2114), the first lower baffle (2123) and the second lower baffle (2124). 4.A brushless motor stator structure according to claim 3, characterized in that: the second upper baffle (2114) is provided with a guide portion (2115) outside along the axial direction of the motor for guiding the clamping head (3013) to be clamped in the clamping seat (302). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 5. The stator structure of the brushless motor according to claim 2, characterized in that: Each of the first connecting plates (2112) and / or each of the second connecting plates (2122) is provided with wire grooves (5) in the axial direction of the motor, and the wire grooves (5) are spaced apart from each other from the inner side to the outer side.

6. The stator structure of the brushless motor according to claim 3, characterized in that: The second upper baffle (2114) is provided with an avoidance groove (6) for the wire harness to pass through.

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