Brushless motor stator upper frame and stator winding assembly structure based on the same

Abstract

This utility model relates to a stator upper frame for a brushless motor and a stator winding assembly structure based on the upper frame. A hub is provided on the outer edge of the end plate of the upper frame, and slots and grooves are provided on the hub. These slots and grooves are used to position the lead wires of the coil assembly, allowing the lead wires to be controlled by the upper frame. Since the slots and grooves are located outside the motor housing, the lead wires are restricted by the grooves and extend along the motor axis outside the motor, reducing the space required for motor storage. Simultaneously, the mutually separated grooves and grooves restrict adjacent lead wires to maintain a certain distance, preventing them from tangling. The perpendicular slots and grooves effectively prevent lead wire rotation, ensuring the stable position of each lead wire. Especially when using rigid lead wires, each lead wire maintains a stable posture due to the constraint of the hub, facilitating automated motor assembly.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, specifically relating to a stator upper frame of a brushless motor and a stator winding assembly structure based on the upper frame. Background Technology

[0002] A brushless motor stator typically consists of a stator core, upper frame, lower frame, and busbar. The upper and lower frames are primarily used for winding and providing stable structural support for the stator windings, preventing displacement or deformation of the windings under electromagnetic forces. Furthermore, the stator frame is usually made of insulating material, effectively preventing current leakage and ensuring safe motor operation.

[0003] Conventional brushless motors require busbars for stator winding connections, increasing manufacturing costs and increasing axial dimensions. To reduce costs, patent CN112636511 A discloses a coil winding frame for magnetic levitation radial bearings and a magnetic levitation radial bearing motor. This patent utilizes a frame with slots for lead-out wires from the coil assembly, allowing connection to power lines or other conductors and terminals, thus eliminating the need for a busbar. However, this structure offers poor control over the lead-out wires. The wires extend outwards perpendicular to the motor axis, increasing space requirements during motor storage. Even manual bending causes rotation, resulting in messy, intertwined, and unstable wire positions, hindering subsequent motor assembly and making automation difficult. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a brushless motor stator upper frame that solves the problem that the traditional frame has poor control over the motor coil lead wires, resulting in unstable position of the lead wires outside the motor and affecting the subsequent motor assembly work.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a brushless motor stator upper frame, including an annular end plate and several winding frames evenly distributed circumferentially on the inner sidewall of the end plate. Each winding frame is separate from the others, and one end of each winding frame extends axially to the outside of the end plate for insertion into the slots of the stator core. A wire collector is provided on the outer edge of the end plate, and three slots are sequentially and discretely formed along the circumferential direction of the top of the wire collector. The three slots are used to respectively engage the three leads formed after the coils are interconnected. On the end face of the end plate facing away from the stator core, multiple arc-shaped baffles are also evenly distributed circumferentially. The arc center is concentric with the center of the end plate. The end of the winding frame away from the inner wall of the end plate is provided with a baffle to limit the sliding of the winding. The baffle extends out of the end plate. The baffle and the baffle are opposite to each other. The hub is located between any two baffles. The hub includes a base plate integrally formed on the outer edge of the end plate and partitions arranged at equal intervals along the circumference of the end plate and connected to the base plate. A groove is formed between adjacent partitions. The outer edge of the base plate is also provided with slots that correspond one-to-one with the slots and are interconnected. The axis of the slots is perpendicular to the axis of the slots. The partitions are located outside the outer edge of the end plate and there is a gap between the partitions and the outer edge of the end plate to accommodate the motor housing.

[0006] As a preferred embodiment, a gap is left between the concave arc surface of the baffle and the inner edge of the end plate for securing the coil wire.

[0007] As a preferred embodiment, the slot opening is inwardly tapered into an "Ω" shape.

[0008] The technical problem to be solved by this utility model is to provide a stator winding assembly structure to solve the technical problem that the lead wires of each coil group of the stator winding are easily entangled with each other outside the motor, which affects the subsequent assembly of the motor.

[0009] The technical solution adopted by this utility model is: a stator winding assembly structure, including a lower frame and a stator core, and also including the aforementioned upper frame. The upper frame and the lower frame are respectively connected to both ends of the stator core. The lower frame is also provided with a winding frame. The winding frames of the upper frame and the lower frame correspond one-to-one and are respectively inserted into the tooth grooves of the stator core. Coils are wound on the two opposing winding frames. Each coil is connected in a delta according to the three-phase control principle of the motor. Then, three leads for connecting the three-phase power supply are inserted into the slots.

[0010] As a preferred embodiment, any of the lead wires is an L-shaped conductor, with the first straight section of the lead wire embedded in the groove and the second straight section snapped into the groove. The free ends of the first straight sections of the three lead wires are respectively connected to three coil groups formed by interconnecting the coils of the motor.

[0011] The beneficial effects of this utility model are as follows: By setting a wire hub on the outer edge of the end plate of the upper frame, and setting grooves and slots on the wire hub, the lead wires of the coil group are positioned using the grooves and slots, thereby allowing the lead wires to be controlled by the upper frame. Since the grooves and slots are located outside the motor housing, the lead wires are restricted by the slots and extend along the motor axis outside the motor, reducing the space required for motor storage. At the same time, due to the restriction of the mutually separated slots, adjacent lead wires can also maintain a certain distance, avoiding mutual entanglement. The perpendicular grooves and slots effectively prevent the lead wires from rotating, keeping the position of each lead wire stable. Especially when using rigid lead wires, each lead wire maintains a stable posture due to the restriction of the wire hub, facilitating the automation of motor assembly. Attached Figure Description

[0012] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0013] Figure 1 This is a three-dimensional structural diagram of the upper skeleton described in this utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the stator winding assembly structure described in this utility model;

[0015] Figure 3 It is an exploded view of the assembly structure of the upper frame, lower frame and stator core;

[0016] Figures 1-3 In the middle: 1. End plate; 2. Winding frame; 3. Hub; 301. Base plate; 302. Partition; 4. Slot; 5. Baffle; 6. Baffle plate; 7. Slot; 100. Upper frame; 200. Lower frame; 300. Stator core; 3001. Gear; 400. Coil; 8. Lead wire; 801. First straight section; 802. Second straight section. Detailed Implementation

[0017] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] like Figure 1The brushless motor stator upper frame shown includes an annular end plate 1 and six winding frames 2 evenly distributed circumferentially on the inner sidewall of the end plate 1. Each winding frame 2 is separate from the others, and one end of each winding frame 2 extends axially along the end plate 1 to the outside of the end plate 1 for insertion into the slots of the stator core. A wire collector 3 is provided on the outer edge of the end plate 1. The top of the wire collector 3 is provided with three slots 4 discretely distributed along the circumferential direction of the end plate 1. The three slots 4 are used to clamp the three leads formed after the coils are connected to each other. Two arc-shaped baffles 5 are also evenly distributed circumferentially on the end face of the end plate 1 facing away from the stator core. The arc center of the baffles 5 is concentric with the circle center of the end plate 1. A baffle 6 is provided on the end of the winding frame 2 away from the inner sidewall of the end plate 1 to limit the sliding of the winding. The baffle 6 extends out of the end plate 1. The baffles 5 and the baffle 6 are opposite each other. The wire collector 3 is located between the two baffles 5.

[0019] The hub 3 includes a base plate 301 integrally formed on the outer edge of the end plate 1 and partition plates 302 arranged at equal intervals along the circumference of the end plate 1 connected to the base plate 301. A groove 4 is formed between adjacent partition plates 302. The outer edge of the base plate 301 is also provided with slots 7 that correspond one-to-one with the groove and are interconnected. The axial direction of the slots 7 is perpendicular to the axial direction of the grooves 4, so that the lead wires can be separated from each other and the lead wires are parallel to the motor axial direction.

[0020] The partition 302 is located outside the outer edge of the end plate 1, and there is a gap between the partition 302 and the outer edge of the end plate 1 to accommodate the motor housing. After the stator assembly is assembled into the motor housing, the partition 302, the groove 4, and the slot 7 on the hub 3 are all located outside the motor housing to limit the lead wires.

[0021] In this embodiment, a gap is left between the concave arc surface of the baffle 5 and the inner edge of the end plate 1 to hold the coil wire.

[0022] To improve the limiting effect, the slot 7 in this embodiment is recessed into an "Ω" shape.

[0023] like Figure 2 and Figure 3 The diagram shows the stator winding assembly structure, including... Figure 1 The upper frame 100, lower frame 200, and stator core 300 are shown. The upper frame 100 and lower frame 200 are respectively connected to both ends of the stator core 300. The lower frame 200 is also equipped with a winding frame 2. The winding frames 2 of the upper frame 100 and lower frame 200 correspond one-to-one and are respectively inserted into the toothed slots 3001 of the stator core 300. Coils 400 are wound on the two opposing winding frames 2. Each coil 400 is connected in a delta configuration according to the three-phase control principle of the motor to form three leads 8 for connecting to the three-phase power supply. Then, the three leads 8 are inserted into the slots 4. The connection structure of each coil 400 of the motor is conventional technology in this field and will not be described in detail here.

[0024] In this embodiment, any of the lead wires 8 is an L-shaped conductor. The first straight section 801 of the lead wire is embedded in the groove 4, and the second straight section 802 is snapped into the groove 7. The free ends of the first straight sections 801 of the three lead wires 8 are respectively connected to the three coil groups formed by interconnecting each coil 400 of the motor.

[0025] Although this embodiment uses 6 winding frames 2 as an example, in actual applications, the number of winding frames can be increased or decreased according to actual needs.

[0026] The working process of this utility model is as follows: Figure 2 and Figure 3 As shown, first, the upper frame 100 and the lower frame 200 are installed on the stator core 300, and then the winding is performed. Each winding frame 2 is wound with an upper coil 400, and the six coils 400 are divided into three groups. The two coils 400 on the diagonal are in the same group and are connected in series. Then, each group is connected in series with each other to form a triangular series connection structure. The nodes of the two adjacent groups of coils 400 are led out to form lead wires 8, and the lead wires 8 are guided to the wire collector 3. After the lead wires 8 are bent, they are respectively inserted into the three slots 4 and the slots 7.

[0027] Lead wire 8 can be made of an independent L-shaped rigid copper conductor, which leads out the nodes of two adjacent sets of coils 400 and connects them with the copper conductor to form lead wire 8.

[0028] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A brushless motor stator upper frame, comprising an annular end plate (1) and several winding frames (2) circumferentially distributed on the inner sidewall of the end plate (1), wherein each winding frame (2) is separate from each other, and one end of each winding frame (2) extends axially along the end plate (1) to the outside of the end plate (1) for insertion into the tooth slot of the stator core, characterized in that, The outer edge of the end plate (1) is provided with a wire hub (3). The top of the wire hub (3) is provided with three slots (4) in a discrete manner along the circumferential direction of the end plate (1). The three slots (4) are used to clamp the three lead wires formed after the coils are connected to each other. On the end face of the end plate (1) facing away from the stator core, there are also multiple arc-shaped baffles (5) evenly distributed in the circumferential direction. The arc center of the baffle (5) is concentric with the circle center of the end plate (1). The end of the winding frame (2) away from the inner side wall of the end plate (1) is provided with a baffle (6) for limiting the sliding of the winding. The baffle (6) extends out of the end plate (1). The baffle (5) is opposite to the baffle (6). The wire hub (3) is located between any two baffles (5). The hub (3) includes a base plate (301) integrally formed on the outer edge of the end plate (1) and partitions (302) arranged at equal intervals along the circumference of the end plate (1) and connected to the base plate (301). A groove (4) is formed between adjacent partitions (302). The outer edge of the base plate (301) is also provided with slots (7) that correspond one-to-one with the groove and are interconnected. The axial direction of the slots (7) is perpendicular to the axial direction of the grooves (4). The partition (302) is located outside the outer edge of the end plate (1) and there is a gap between the partition (302) and the outer edge of the end plate (1) to accommodate the motor housing.

2. The brushless motor stator upper frame according to claim 1, characterized in that, A gap is left between the concave arc surface of the baffle (5) and the inner edge of the end plate (1) for securing the coil wire.

3. The brushless motor stator upper frame according to claim 1, characterized in that, The opening of the slot (7) is inwardly tapered into an "Ω" shape.

4. A stator winding assembly structure, comprising a lower frame (200) and a stator core (300), characterized in that, It also includes the upper frame (100) as described in any one of claims 1 to 3, the upper frame (100) and the lower frame (200) are respectively connected to the two ends of the stator core (300), the lower frame (200) is also provided with a winding frame (2), the winding frames (2) of the upper frame (100) and the lower frame (200) are one-to-one corresponding and respectively inserted into the tooth groove (3001) of the stator core (300), and coils (400) are wound on the two opposing winding frames (2), and each coil (400) is connected in a delta according to the three-phase control principle of the motor to form three leads (8) for connecting the three-phase power supply, and then the three leads (8) are inserted into the groove (4).

5. The stator winding assembly structure according to claim 4, characterized in that, Any of the lead wires (8) is an L-shaped conductor. The first straight section (801) of the lead wire is embedded in the groove (4), and the second straight section (802) is snapped into the groove (7). The free ends of the first straight sections (801) of the three lead wires (8) are respectively connected to the three coil groups formed by the interconnection of each coil (400) of the motor.

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