Motor with integrated wire bridge

Abstract

The utility model relates to a motor with an integrated wire bridge, and solves the problems that the wiring of a stator coil of a conventional motor is complicated, and the wiring of a wire end may have insulation damage to cause the damage of the motor. The motor is an inner rotor motor, a plurality of stator winding grooves are evenly formed in the periphery of a stator, stator coils are wound in the stator winding grooves, a stator coil holder is fixed to the rear end face of the stator, supporting legs are fixedly arranged on the stator coil holder and correspond to the stator winding grooves, and hooks for hanging copper wires of the stator coils are arranged on the outer side faces of the supporting legs. The rear end of the stator coil holder is provided with a wire bridge, 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 wire bridge, and the supporting legs are sequentially in lap joint with the first wire bridge, the second wire bridge and the third wire bridge according to the circumferential sequence. The first wire bridge, the second wire bridge and the third wire bridge serve as embedded parts and are integrally formed with the wire bridge frame in an injection molding mode. According to the utility model, the wire bridges and the wire bridge frame are integrally formed through injection molding, only the joints are exposed outside, the wire bridges cannot be deformed under extreme working conditions, the electric reliability is good, and meanwhile, the wrapping structure of the wire bridge frame to the wire bridges can enable the structures of all parts at the rear end of the motor to be more compact.

Description

Technical Field

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

[0002] The conventional motor structure includes a stator and a rotor. The stator coil is wound around the circumference of the stator facing the rotor, and magnetic steel sheets are evenly arranged on the side of the rotor facing the stator. By feeding a periodically changing current into the stator coil, a periodically changing induced magnetic field is generated, thereby driving the rotor to rotate in the induced magnetic field. The winding of the stator coil is the focus of the motor structure. The stator wire frame is set on the end face of the stator, and the wire ends of the stator coil are connected from the stator wire frame. The traditional stator coil wiring is complicated and easily causes insulation damage during the wiring process. Long-term use under extreme working conditions may cause insulation damage and wire ends to short-circuit, resulting in motor damage. Utility Model Content

[0003] The purpose of the utility model is to solve the problem that the wiring of the existing motor stator coil is complicated, the wiring of the wire end may have insulation damage, and cause the motor to be damaged. A motor with an integrated wire bridge is provided. The wiring of the stator coil is realized by using a C-shaped wire bridge, and the wire bridge is integrally injection molded into the wire bridge frame for solidification. The wire bridge position is solidified, the insulation performance is good, and it is not easy to deform under extreme working conditions. After the wire bridge and the wire bridge frame are integrally injection molded, they can be more closely assembled with other parts, making the motor end structure more compact, and completely solving the problem of phase short circuit at the coil end. The structure can also realize the automated production of the stator, greatly saving labor costs.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a motor with an integrated wire bridge, comprising a stator and a rotor arranged on the inner side of the stator, characterized in that: a plurality of stator winding slots are evenly arranged around the stator, stator coils are wound in the stator winding slots, a stator wire frame is fixed on the rear end surface of the stator, the stator wire frame is fixedly provided with a support foot corresponding to each stator winding slot, a hook is arranged on the outer side of the support foot for hanging the copper wire of the stator coil, a wire bridge frame is arranged at the rear end of the stator wire frame, a first wire bridge, a second wire bridge and a third wire bridge respectively connected to the three-phase electric wires are embedded in the wire bridge frame, each support foot is alternately overlapped with the first wire bridge, the second wire bridge and the third wire bridge in turn according to the circumferential order, the first wire bridge, the second wire bridge and the third wire bridge are made of conductive materials, the wire bridge frame is made of insulating materials, and the first wire bridge, the second wire bridge and the third wire bridge are integrally injection molded as embedded parts with the wire bridge frame.

[0005] Taking a motor with six legs as an example, the ends of the 1st and 4th legs are connected to the first wire bridge, the ends of the 2nd and 5th legs are connected to the second wire bridge, and the ends of the 3rd and 6th legs are connected to the third wire bridge. In this device, after the positions of the wire bridges are determined, they are integrally injection molded with the wire bridge frame, and each wire bridge is buried and fixed in the wire bridge frame, with only the joints exposed. Each wire bridge will not deform under extreme working conditions, and has good electrical reliability. At the same time, the wrapping structure of the wire bridge frame on the wire bridge can make the structure of the components at the rear end of the motor more compact, leaving a smaller installation gap, and is not prone to deformation interference.

[0006] Preferably, the first wire bridge, the second wire bridge and the third wire bridge are all C-shaped pieces, the radii of the first wire bridge, the second wire bridge and the third wire bridge increase successively, the first wire bridge, the second wire bridge and the third wire bridge are arranged successively from the inside to the outside in the wire bridge frame, and the first wire bridge, the second wire bridge and the third wire bridge do not contact each other.

[0007] Preferably, the first wire bridge, the second wire bridge, the third wire bridge and the overlapping legs are provided with overlapping joints corresponding to the overlapping legs, the overlapping joints are provided with slots, and the upper ends of the legs are inserted into the slots and fixed; the first wire bridge, the second wire bridge, the third wire bridge are respectively provided with external connectors connected to the three-phase electric wires.

[0008] Preferably, a Hall plate is further provided at the rear end of the stator wire frame, and an avoidance groove is provided at the wire bridge frame and the Hall plate. The Hall plate can be directly pressed and fixed on the stator wire frame by the wire bridge frame, and the installation gap is smaller, which is not easy to produce unnecessary shaking. The Hall plate can also be directly fixed to the stator wire frame or the wire bridge frame. The wire bridge frame can leave an avoidance groove at the far end of the C-type wire bridge to facilitate the installation and wiring of the Hall plate.

[0009] Preferably, the wire bridge, the Hall plate and the stator wire frame are fixed by screws, and the screw fixing holes of the Hall plate are aligned with the screw fixing holes of the wire bridge.

[0010] Preferably, the legs are red copper legs, the hooks are formed by bending the legs in one piece, the hooks are elastic and can be spot welded to the legs. After the stator coil is wound, the ends of the hooks can be pressed on the legs and spot welded to the legs.

[0011] Preferably, magnetic sheet slots are provided on the inner side of the surface of the rotor, and the magnetic sheet slots are evenly arranged around the circumference of the rotor, and magnetic steel sheets are inserted into the magnetic sheet slots.

[0012] Preferably, a cosine curve surface is provided on the rotor surface corresponding to each magnetic sheet slot.

[0013] Preferably, the lower end of the support foot is embedded in the stator wire frame, and inverted teeth are provided on both side walls formed by the lower end of the support foot and the stator wire frame being embedded.

[0014] Preferably, a rear cover is provided on the rear side of the wire bridge, and the minimum installation gap between the wire bridge and the rear cover does not exceed 1 mm.

[0015] The wire bridge and the wire bridge frame of the utility model are integrally injection molded, with only the joints exposed outside. The wire bridges will not deform even under extreme working conditions, and the electrical reliability is good. At the same time, the wrapping structure of the wire bridge frame on the wire bridge can make the structure of the components at the rear end of the motor more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Figure 1 The utility model is a schematic diagram of the rear end structure of a motor.

[0018] Figure 2 It is a schematic cross-sectional view of a stator and a rotor of the utility model.

[0019] Figure 3 The utility model is a schematic diagram of the rear end structure of a motor with the rear cover removed.

[0020] Figure 4 The utility model is a schematic diagram of a wire bridge and a Hall plate structure.

[0021] Figure 5 The utility model is a structural schematic diagram of removing the wire bridge.

[0022] Figure 6 This is a schematic diagram of the rear end structure of the second motor of the utility model.

[0023] In the figure: 1, stator, 2, stator winding slot, 3, rotor, 4, magnetic sheet slot, 5, support foot, 6, hook, 7, wire bridge, 8, lap joint, 9, external joint, 10, back cover, 11, three-phase wire, 12, stator wire frame, 13, Hall plate, 14, wiring side, 15, avoidance groove, 16, inverted teeth, 17, first wire bridge, 18, second wire bridge, 19, third wire bridge, 20, stator coil. DETAILED DESCRIPTION

[0024] The present invention is further described below through specific embodiments in conjunction with the accompanying drawings.

[0025] Embodiment 1: A motor with an integrated wire bridge, such as Figure 1 , 3 , 5. The device comprises a stator 1 and a rotor 3 arranged inside the stator, as shown in Figure 2As shown, the stator 1 is evenly provided with a plurality of stator winding slots 2 around the circumference, and the stator coils are wound in the stator winding slots. The inner side of the surface of the rotor 3 is provided with magnetic sheet slots 4, and the magnetic sheet slots are evenly provided around the circumference of the rotor, and magnetic steel sheets are inserted in the magnetic sheet slots. A cosine curve surface is provided on the rotor surface corresponding to each magnetic sheet slot.

[0026] like Figure 1 , 3 As shown in Figure 5, a stator bobbin 12 is fixed to the rear end face of the stator 1. A support leg 5 is fixedly provided on the stator bobbin 12 corresponding to each stator winding slot 2. A hook 6 for hanging the copper wire of the stator coil is provided on the outer side of the support leg 5. The support leg 5 is a red copper support leg. The hook 6 is formed by bending the support leg in one piece. The hook is elastic and can be fixed by spot welding with the surface of the support leg. Adjacent stator coils are continuously wound with the same copper wire. The same wire between adjacent stator coils is hung on the hook 6. After the winding is completed, the hook is folded inward and welded to the outer surface of the support leg. The guide and the hook 6 are mutually conductive. The lower end of the support leg 5 is embedded in the stator bobbin 12. Inverted teeth 16 are provided on the two side walls between the lower end of the support leg 5 and the stator bobbin 12. The stator wire frame 12 is provided with a wire bridge frame 7 at the rear end, and the wire bridge frame is embedded with a first wire bridge 17, a second wire bridge 18, and a third wire bridge 19 respectively connected to the three-phase wires. Each leg 5 is alternately overlapped with the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 in a circumferential order. The first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are made of conductive materials, and the wire bridge frame 7 is made of insulating materials. The first wire bridge, the second wire bridge, and the third wire bridge are used as embedded parts and are integrally injection molded with the wire bridge frame. A rear cover 10 is provided at the rear side of the wire bridge frame 7, and the minimum installation gap between the wire bridge frame and the rear cover is 0.8 mm.

[0027] like Figure 5 As shown, the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are all C-shaped sheets, and the width direction of the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 extends along the axial direction of the motor, that is, the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are part of the cylindrical surface. The radius of the first wire bridge, the second wire bridge, and the third wire bridge increases successively, and the first wire bridge, the second wire bridge, and the third wire bridge are arranged successively from the inside to the outside in the wire bridge frame, and the first wire bridge, the second wire bridge, and the third wire bridge do not contact each other.

[0028] In this example, the motor has 6 legs, the ends of the 1st and 4th legs are connected to the first wire bridge, the ends of the 2nd and 5th legs are connected to the second wire bridge, and the ends of the 3rd and 6th legs are connected to the third wire bridge. The first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are provided with overlapping joints 8 corresponding to the overlapping legs 5, and the overlapping joints are provided with slots, and the upper ends of the legs are inserted into the slots for fixing; the first wire bridge, the second wire bridge, and the third wire bridge are respectively provided with external joints 9 connected to the three-phase wires 11.

[0029] like Figure 3 , 4 As shown, a Hall plate 13 is arranged between the wire bridge frame 7 and the stator wire frame 12 , one side of the Hall plate is a wiring side 14 , and an avoidance groove 15 is arranged at the front side surface of the wire bridge frame 12 corresponding to the Hall plate wiring side 14 .

[0030] The wire bridge 7, the Hall plate 13 and the stator wire frame 12 are fixed with screws, and the screw fixing holes of the Hall plate are aligned with the screw fixing holes of the wire bridge. The wire bridge presses the Hall plate onto the stator wire frame.

[0031] Embodiment 2: A motor with an integrated wire bridge, such as Figure 6 As shown. The device comprises a stator 1 and a rotor arranged inside the stator. The stator 1 is evenly provided with a plurality of stator winding slots 2 around the stator 1. The stator coils are wound in the stator winding slots. The inner surface of the rotor is provided with magnetic sheet slots. The magnetic sheet slots are evenly provided around the rotor. Magnetic steel sheets are inserted in the magnetic sheet slots. A cosine curve surface is provided on the rotor surface corresponding to each magnetic sheet slot.

[0032] A stator bobbin 12 is fixed to the rear end face of the stator 1. A support leg 5 is fixedly provided on the stator bobbin 12 corresponding to each stator winding slot 2. A hook 6 for hanging the copper wire of the stator coil is provided on the outer side of the support leg 5. The support leg 5 is a red copper support leg. The hook 6 is formed by bending the support leg in one piece. The hook is elastic and can be fixed by spot welding with the surface of the support leg. Adjacent stator coils are continuously wound with the same copper wire. The same wire between adjacent stator coils is hung on the hook 6. After the winding is completed, the hook is folded inward and welded to the outer surface of the support leg. The guide and the hook 6 are mutually conductive. The lower end of the support leg 5 is embedded in the stator bobbin 12. Inverted teeth 16 are provided on the two side walls between the lower end of the support leg 5 and the stator bobbin 12. A wire bridge frame 7 is provided at the rear end of the stator wire frame 12, and the wire bridge frame is embedded with a first wire bridge 17, a second wire bridge 18, and a third wire bridge 19 respectively connected to the three-phase wires. Each leg 5 is alternately overlapped with the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 in a circumferential order. The first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are made of conductive materials, and the wire bridge frame 7 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 wire bridge frame.

[0033] like Figure 6As shown, the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are all C-shaped sheets, and the width direction of the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 extends along the axial direction of the motor, that is, the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are part of the cylindrical surface. The radius of the first wire bridge, the second wire bridge, and the third wire bridge increases successively, and the first wire bridge, the second wire bridge, and the third wire bridge are arranged successively from the inside to the outside in the wire bridge frame, and the first wire bridge, the second wire bridge, and the third wire bridge do not contact each other.

[0034] In this example, the motor has 12 legs, the ends of the 1st, 4th, 7th and 10th legs are connected to the first wire bridge, the ends of the 2nd, 5th, 8th and 11th legs are connected to the second wire bridge, and the ends of the 3rd, 6th, 9th and 12th legs are connected to the third wire bridge. The first wire bridge 17, the second wire bridge 18 and the third wire bridge 19 are provided with a lap joint 8 corresponding to the lapped legs 5, and a slot is provided on the lap joint, and the upper end of the legs is inserted into the slot for fixing; the first wire bridge, the second wire bridge and the third wire bridge are respectively provided with an external joint 9 connected to the three-phase wire 11.

[0035] like Figure 6 As shown, the stator coil 20 is wound in the stator winding slot, and adjacent stator coils are continuously wound using the same wire. The wire between adjacent stator coils is hung on the hook 6. After the winding is completed, the hook is folded inward and welded to the outer surface of the support leg, and the guide and the hook 6 are connected to each other.

[0036] The first wire bridge 17, the second wire bridge 18, and the third wire bridge 19 are all C-shaped pieces, which are embedded in the wire bridge frame 7 by integral injection molding. The wire bridge frame 7 leaves avoidance grooves 15 at the C-shaped notches of the first wire bridge 17, the second wire bridge 18, and the third wire bridge 19, and the Hall plate 13 is installed at the avoidance grooves of the wire bridge frame 7.

Claims

1. A motor with an integrated wire bridge, comprising a stator and a rotor arranged inside the stator, characterized in that: A plurality of stator winding slots are evenly arranged around the stator, and stator coils are wound in the stator winding slots. A stator bobbin is fixed on the rear end surface of the stator, and a support foot is fixedly arranged on the stator bobbin corresponding to each stator winding slot, and a hook for hanging the stator coil copper wire is arranged on the outer side of the support foot. A wire bridge is arranged at the rear end of the stator bobbin, and a first wire bridge, a second wire bridge, and a third wire bridge respectively connected to the three-phase electric wires are embedded in the wire bridge, and each support foot is alternately overlapped with the first wire bridge, the second wire bridge, and the third wire bridge in a circumferential order, and the first wire bridge, the second wire bridge, and the third wire bridge are made of conductive materials, and the wire bridge is made of insulating materials. The first wire bridge, the second wire bridge, and the third wire bridge are integrally injection-molded as embedded parts with the wire bridge.

2. The motor with an integrated wire bridge according to claim 1, characterized in that: The first wire bridge, the second wire bridge and the third wire bridge are all C-shaped pieces, the radii of the first wire bridge, the second wire bridge and the third wire bridge increase successively, the first wire bridge, the second wire bridge and the third wire bridge are arranged successively from the inside to the outside in the wire bridge frame, and the first wire bridge, the second wire bridge and the third wire bridge do not contact each other.

3. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: The first wire bridge, the second wire bridge, and the third wire bridge are respectively provided with overlapping joints corresponding to the overlapping legs, and a slot is provided on the overlapping joint, and the upper end of the leg is inserted into the slot for fixing; the first wire bridge, the second wire bridge, and the third wire bridge are respectively provided with external joints connected to the three-phase electric wires.

4. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: A Hall plate is also arranged at the rear end of the stator wire frame, and avoidance grooves are arranged at positions corresponding to the wire bridge frame and the Hall plate.

5. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: The wire bridge, the Hall plate and the stator wire frame are fixed by screws, and the screw fixing holes of the Hall plate are aligned with the screw fixing holes of the wire bridge.

6. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: The support legs are red copper support legs, and the hooks are formed by bending the support legs in one piece. The hooks are elastic and can be fixed to the surface of the support legs by spot welding.

7. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: The inner side of the surface of the rotor is provided with a magnetic sheet slot, the magnetic sheet slot is evenly arranged around the rotor, and a magnetic steel sheet is inserted into the magnetic sheet slot.

8. The motor with an integrated wire bridge according to claim 7, characterized in that: The rotor surface is provided with a cosine curve surface corresponding to each magnetic sheet slot.

9. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: The lower end of the support foot is embedded in the stator wire frame, and inverted teeth are arranged on two side walls formed by the lower end of the support foot and the stator wire frame being embedded.

10. A motor with an integrated wire bridge according to claim 1 or 2, characterized in that: A rear cover is arranged at the rear side of the wire bridge, and the minimum installation gap between the wire bridge and the rear cover does not exceed 1 mm.

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