Wire holder and wire bridge integrated motor

Abstract

The utility model relates to a coil holder and coil bridge integrated motor, which comprises a stator and a rotor arranged on the inner side of the stator, a stator iron core is arranged on the inner circumference of the stator, stator coils are uniformly wound on the stator iron core, and a stator coil holder is fixed on the rear end face of the stator. A first wire bridge, a second wire bridge and a third wire bridge which are correspondingly connected with three-phase wires are embedded in the stator wire frame, the first wire bridge, the second wire bridge and the third wire bridge are not in contact with one another and are all made of conductive materials, the stator wire frame is made of insulating materials, and the first wire bridge, the second wire bridge and the third wire bridge serve as embedded parts and are integrally formed with the stator wire frame in an injection molding mode. The first wire bridge, the second wire bridge and the third wire bridge are sequentially and alternately provided with upward supporting feet, the outer side faces of the supporting feet are provided with hooks bent downwards, the supporting feet are arranged between the adjacent stator coils, and connector lugs of the stator coils are hung on the hooks of the supporting feet. According to the utility model, the problem that the existing stator coil holder and C-shaped wire bridge are of a split assembly type structure and need to be processed in a split manner is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a wire-frame and wire-bridge integrated motor. Background Art

[0002] Conventional inner-rotor motors have an outer stator and an inner rotor. The stator core is located inside the stator, which is equipped with winding slots and stator coils. Magnetic steel sheets are placed on the outer side of the rotor. A periodically varying current is fed into the stator coils, generating a periodically varying induced magnetic field, which drives the rotor to rotate within the induced magnetic field. After the stator coil wires are drawn out, a stator bobbin is installed at the stator end face, where the stator coil wires are connected. Conventional stator coil wiring is complex and prone to insulation damage during the wiring process. Long-term use under extreme operating conditions can lead to insulation failure, wire overlap, and short circuits, resulting in motor damage. Some also use C-type wire bridges for wiring wire ends, but the traditional C-type wire bridge and stator wire frame are separate structures, that is, the wire ends of the stator coil need to be hung on the support legs of the stator wire frame first, and then the C-type wire bridge and the support legs are clamped together to achieve wiring. In the above structure, since the stator wire frame and the C-type wire bridge are separate structures, they need to be processed and formed separately, and then wired and assembled. Not only is the process more complicated, but also high requirements are placed on the processing accuracy of the wire frame and the wire bridge. Since the support legs of the stator wire frame and the C-type wire bridge are made of copper, they are easy to deform. Once the processing accuracy is insufficient, it will affect the subsequent assembly of the wire bridge and wire frame. Utility Model Content

[0003] The purpose of the utility model is to solve the problem that the existing stator bobbin and C-shaped wire bridge are split assembly structures, need to be processed separately, need to be assembled after wiring, and have high requirements for processing accuracy. The utility model provides a bobbin-wire-bridge integrated motor, in which the wire bridge and the stator bobbin are cast into an integrated structure, and the support legs for the stator wire end wiring are directly integrated into the wire bridge, so that the stator wiring operation can be completed at one time, and the subsequent automated processing of the stator coil is convenient.

[0004] The utility model solves the technical problem thereof by adopting the technical solution of: a wire frame and wire bridge integrated motor, comprising a stator and a rotor arranged inside the stator, a stator core arranged around the inner circumference of the stator, stator coils evenly wound on the stator core, a stator wire frame fixed to the rear end surface of the stator, a first wire bridge, a second wire bridge, and a third wire bridge embedded in the stator wire frame, respectively connected to the three-phase wires, the first wire bridge, the second wire bridge, and the third wire bridge not contacting each other and all made of conductive materials, the stator wire frame is made of insulating material, the first wire bridge, the second wire bridge, and the third wire bridge are integrally injection-molded as embedded parts with the stator wire frame; the first wire bridge, the second wire bridge, and the third wire bridge are alternately provided with upward supporting legs, the outer sides of the supporting legs are provided with downwardly bent hooks, the supporting legs are arranged between adjacent stator coils, the terminal ends of the stator coils are hung on the hooks of the supporting legs, and the first wire bridge, the second wire bridge, and the third wire bridge are provided with three-phase electrical connectors on the same side of the stator wire frame.

[0005] In this device, in circumferential order, the first wire bridge is provided with legs 1, 4, ...; the second wire bridge is provided with legs 2, 5, ...; and the third wire bridge is provided with legs 3, 6, .... The wire bridge and corresponding legs are integrally formed from the same material. The first, second, and third wire bridges avoid contact with each other, either inside or outside or up and down. The legs of the first, second, and third wire bridges are uniformly bent outward to avoid contact, so that the legs are located on the same circumference, facilitating wiring. The wire bridge and bobbin are integrally formed, reducing the number of parts and lowering processing costs. Furthermore, because the wire bridge and legs are integrally formed and embedded in the stator bobbin and cast as one, the stator bobbin can be wired directly after installation, reducing the bobbin and wire bridge assembly process and eliminating the assembly and welding steps. Furthermore, since the stator bobbin and wire bridge do not need to be butt-jointed for installation, there is no need to consider the docking accuracy. Stator winding can be completed directly after the stator bobbin is installed, enabling automated processing.

[0006] Preferably, the legs and three-phase electrical connectors are exposed outside the stator wire frame.

[0007] Preferably, the legs of the first, second, and third wire bridges are bent outwards to avoid interference, and the legs are arranged on concentric circles with the rotor axis as the center, ensuring symmetry of the legs in all directions and facilitating standardized winding.

[0008] Preferably, the stator bobbin is provided with a concave leg avoidance groove at the corresponding position between the stator bobbin and the leg, with the top of the leg no higher than the top of the leg avoidance groove. The leg is protected within the stator bobbin, exposed only from the leg avoidance groove, providing support for the leg and preventing deformation. The hook is a flexible structure that can be welded to the leg under internal pressure to prevent deformation of the welded leg.

[0009] Preferably, the support leg avoidance groove is provided with a wire end avoidance groove on both sides, and the stator coil terminal is inserted into the wire end avoidance groove from both sides and hung on the hook. The wire end avoidance groove allows the terminal to be rewound and hung on the hook, ensuring a reliable connection between the terminal and the hook.

[0010] Preferably, the bottom of the thread end avoidance groove is not higher than the height of the hook.

[0011] Preferably, the stator coil is wound in parallel with two wires, and the terminal is also wound in parallel with two wires, so as to avoid the wire diameter being too thick.

[0012] Preferably, the stator wire frame is provided with connector slots at positions corresponding to the three-phase electrical connectors.

[0013] Preferably, a Hall plate mounting groove is provided on a side of the stator wire frame away from the three-phase electrical connector, and the Hall plate is fixed at the Hall plate mounting groove.

[0014] Preferably, a rear cover is provided at the rear end of the stator bobbin, and a front cover is provided at the front end of the stator.

[0015] The wire bridge and the stator wire frame of the utility model are cast into an integrated structure, and the support legs for connecting the stator wire ends are directly integrated into the wire bridge, which reduces the wire bridge assembly process and does not need to consider the assembly and splicing accuracy. The stator wiring operation can be completed in one go, and the subsequent automated processing of the stator coil is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the rear end structure of a motor of the present invention.

[0018] Figure 2 This is a structural schematic diagram of the utility model after removing the rear cover and the stator wire frame.

[0019] Figure 3 This is a schematic diagram of a wire bridge structure of the present utility model.

[0020] Figure 4 This is a schematic diagram of the stator bobbin structure of the utility model.

[0021] In the figure: 1. Stator, 2. Front cover, 3. Stator wire frame, 4. Rear cover, 5. Three-phase electrical connector, 6. Support leg, 7. Hook, 8. Terminal block, 9. Stator coil, 10. Stator core, 11. First wire bridge, 12. Second wire bridge, 13. Third wire bridge, 14. Connector slot, 15. Support leg avoidance slot, 16. Wire end avoidance slot, 17. Hall plate. DETAILED DESCRIPTION

[0022] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0023] Embodiment: A wire frame and wire bridge integrated motor, such as Figure 1 、 2 The device comprises a stator 1 and a rotor disposed inside the stator. A stator core 10 is disposed circumferentially within the stator, and stator coils 9 are evenly wound around the stator core 10. A stator bobbin 3 is fixed to the rear end of the stator 1, and a rear cover 4 is disposed at the rear end of the stator bobbin 3. A front cover 2 is disposed at the front end of the stator 1.

[0024] The stator bobbin 3 is embedded with a first wire bridge 11, a second wire bridge 12, and a third wire bridge 13, each connected to the three-phase wires. These first, second, and third wire bridges 11, 12, and 13 do not touch each other and are all made of conductive material, preferably copper in this example. The stator bobbin 3 is made of insulating material and is integrally injection-molded as pre-embedded components. Each of the first, second, and third wire bridges 11, 12, and 13 is alternately provided with upward-facing legs 6, circumferentially arranged: legs 1, 4, ..., on the first bridge; legs 2, 5, ..., on the second bridge; and legs 3, 6, ..., on the third bridge. The outer side of the support leg 6 is provided with a downwardly bent hook 7. The support leg is positioned between adjacent stator coils 9. The stator coil terminals 8 are hung on the support leg hook 7. The first, second, and third wire bridges 11, 12, and 13 are provided with three-phase electrical connectors 5 on the same side of the stator bobbin 3. The support leg 6 and the three-phase electrical connectors 5 are exposed outside the stator bobbin 3.

[0025] like Figure 3 As shown, the first wire bridge 11, the second wire bridge 12, and the third wire bridge 13 are bent outwards to avoid the support legs 6, and each support leg 6 is arranged on a concentric circle with the rotor axis as the center.

[0026] like Figure 1 、 2 As shown in Figure 4, a concave foot avoidance groove 15 is provided at the corresponding position of the stator bobbin 3 and the foot 6, and the top of the foot 6 is not higher than the top of the foot avoidance groove 15. Wire end avoidance grooves 16 are provided on both sides of the foot avoidance groove 15, and the terminal 8 of the stator coil is inserted into the wire end avoidance groove 16 from both sides and hung on the hook 7. The bottom of the wire end avoidance groove 16 is not higher than the height of the hook 7. The stator coil is wound in parallel with two wires, and the terminal is also a double-wire wound terminal. A joint groove 14 is provided at the corresponding position of the stator bobbin 3 and the three-phase electrical connector 5. A Hall plate mounting groove is provided on the side of the stator bobbin away from the three-phase electrical connector, and a Hall plate 17 is fixed at the Hall plate mounting groove.

[0027] The device does not require assembly of a wire bridge and a stator bobbin; the wire bridge and the stator bobbin are integrally formed, thereby realizing automation of stator winding.

Claims

1. A bobbin-and-wire-bridge integrated motor, comprising a stator and a rotor disposed inside the stator, wherein a stator core is disposed circumferentially within the stator, and stator coils are uniformly wound around the stator core, characterized in that: A stator bobbin is fixed to the rear end face of the stator, and a first wire bridge, a second wire bridge, and a third wire bridge are embedded in the stator bobbin, which are respectively connected to the three-phase electric wires. The first wire bridge, the second wire bridge, and the third wire bridge do not contact each other and are all made of conductive materials. The stator bobbin is made of insulating material. The first wire bridge, the second wire bridge, and the third wire bridge are integrally injection-molded with the stator bobbin as embedded parts. The first wire bridge, the second wire bridge, and the third wire bridge are alternately provided with upward supporting legs, and the outer sides of the supporting legs are provided with downwardly bent hooks. The supporting legs are provided between adjacent stator coils, and the terminal ends of the stator coils are hung on the hooks of the supporting legs. The first wire bridge, the second wire bridge, and the third wire bridge are provided with three-phase electrical connectors on the same side of the stator bobbin.

2. The wire-frame and wire-bridge integrated motor according to claim 1, characterized in that: The legs and three-phase electrical connectors are exposed outside the stator wire frame.

3. The wire-frame and wire-bridge integrated motor according to claim 1, characterized in that: The first wire bridge, the second wire bridge and the third wire bridge are provided with support legs that are bent outwards to avoid interference, and each support leg is provided on a concentric circle with the rotor axis as the center.

4. A wire-frame and wire-bridge integrated motor according to claim 1, 2 or 3, characterized in that: A concave support foot avoidance groove is provided at the corresponding position of the stator wire frame and the support foot, and the top of the support foot is not higher than the top of the support foot avoidance groove.

5. The wire-frame and wire-bridge integrated motor according to claim 4, characterized in that: Wire end avoidance grooves are provided on both sides of the support leg avoidance groove, and the connection ends of the stator coil are inserted into the wire end avoidance grooves from both sides and hung on the hooks.

6. The wire-frame and wire-bridge integrated motor according to claim 5, characterized in that: The bottom of the thread end avoidance groove is not higher than the height of the hook.

7. The wire-frame and wire-bridge integrated motor according to claim 1, 2 or 3, characterized in that: The stator coil is wound in parallel with two wires, and the terminal head is also wound in parallel with two wires.

8. The wire-frame and wire-bridge integrated motor according to claim 1, 2 or 3, characterized in that: The stator wire frame is provided with joint slots at positions corresponding to the three-phase electrical joints.

9. The wire-frame and wire-bridge integrated motor according to claim 1, 2 or 3, characterized in that: A Hall plate mounting slot is provided on one side of the stator wire frame away from the three-phase electrical connector, and the Hall plate is fixed at the Hall plate mounting slot.

10. The wire-frame and wire-bridge integrated motor according to claim 1, 2 or 3, characterized in that: The rear end of the stator bobbin is provided with a rear cover, and the front end of the stator is provided with a front cover.

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