A motor skeleton, a stator using the motor skeleton, and a motor

Abstract

The present invention discloses a motor skeleton, a stator and a motor applying the motor skeleton. The motor skeleton includes a skeleton outer wall, and a plurality of skeleton bases are uniformly arranged along the bottom of the inner side surface of the skeleton outer wall. One end of the skeleton base is connected to the skeleton outer wall, and the other end of the skeleton base extends inward, and a skeleton inner wall is provided at the extended end; a plurality of large opening grooves and small opening grooves are formed in the circumference of the skeleton outer wall, a wire passing passage is provided on the outer side surface of the skeleton outer wall, and a through hole for avoiding the wire passing passage is provided below the wire passing passage. The present invention can simplify the wiring process, improve the structural stability of the motor, enhance the insulation performance of the motor, and extend the service life of the motor.

Description

Technical Field

[0001] The present invention relates to the field of motors, and more particularly to a motor skeleton, a stator and a motor using the motor skeleton. Background Art

[0002] A motor stator is composed of a stator core, an enameled wire winding, an insulating layer, leads, etc. Among them, resin insulation skeletons are usually used in small DC brushless motors to achieve the winding structure for insulation purposes. As an insulating component of the motor, the resin insulation skeleton is not only related to the reliability and lifespan of the motor, but also closely related to the overall structure of the motor (including winding methods, wiring methods, etc.). A reasonable resin insulation skeleton structure can improve the performance of the motor, simplify the production process, improve production efficiency, and ensure the motor's long-term resistance to electricity, heat, mechanical shock, and various harsh operating requirements to the greatest extent.

[0003] In a concentrated winding motor with an insulating skeleton structure, each single enameled wire winding has two wire ends, namely the incoming wire end and the outgoing wire end, and subsequent wiring processing is required for these wire ends.

[0004] 1. Due to the large number of wire ends, it affects the operation efficiency of wire separation and wiring.

[0005] 2. The copper wire of the outgoing wire is on the surface of the coil and is prone to movement, increasing the risks of short circuit and leakage.

[0006] 3. When the copper wire transitions on the surface of the coil, it increases the risk of phase-to-phase short circuit.

[0007] Therefore, it is necessary to design a new type of motor skeleton structure to simplify the operation, reduce defects, improve insulation performance, and extend the service life of the motor. Summary of the Invention

[0008] The purpose of the present invention is to provide a motor skeleton, a stator and a motor using the motor skeleton to solve the problems existing in the prior art in view of the deficiencies in the prior art.

[0009] The technical problems solved by the present invention can be achieved by the following technical solutions:

[0010] A motor skeleton includes a skeleton outer wall. Along the bottom of the inner side of the skeleton outer wall, a plurality of skeleton bases are evenly provided. One end of the skeleton base is connected to the skeleton outer wall, and the other end of the skeleton base extends inward, and a skeleton inner wall is provided at the extended end.

[0011] A plurality of large opening grooves and small opening grooves are provided along the circumference of the skeleton outer wall. A wire passing path is provided on the outer side of the skeleton outer wall, and a through hole for avoiding the wire passing path is provided below the wire passing path.

[0012] Further, the large opening slots and small opening slots are evenly distributed along the circumference of the outer wall of the skeleton, and two small opening slots are provided between any two adjacent large opening slots;

[0013] Let the width of the large opening slot be B1, the width of the small opening slot be B2, the number of slots of the stator be S, and the wire diameter of the stator winding be φ, then

[0014] The range of the width B1 of the large opening slot is: 3×φ ≤ B1 ≤ S - 1;

[0015] The range of the width B2 of the small opening slot is: 1.5×φ ≤ B2 ≤ 4×φ.

[0016] Further, the included angle between the center line of the small opening slot on the outer wall of the skeleton and the center line of the slot tooth of the stator is A, and the number of slots of the stator is S, then

[0017] (1 / 4)×360 / (S×2) ≤ A ≤ (3 / 4)×360 / (S×2).

[0018] Further, the wire passing path is limited by an upper protrusion located at the top of the outer side surface of the outer wall of the skeleton and a lower protrusion located at the bottom of the outer side surface of the outer wall of the skeleton;

[0019] Let the distance between the lower end surface of the upper protrusion and the upper end surface of the lower protrusion be C, the distance between the upper end surface of the lower protrusion and the stator core be E, and the wire diameter of the stator winding be φ, then

[0020] C ≥ (S / 2)×φ, E > φ.

[0021] A wiring structure of a stator, having a motor skeleton with the above structure, a neutral point is arranged on the outer surface of the outer wall of the skeleton, and after the wiring of the neutral point passes along the wire passing path on the outer surface of the outer wall of the skeleton, it is placed between the inner wall and the outer wall of the motor skeleton.

[0022] Adjacent three-phase windings are connected to a neutral point, and among them, two-phase windings pass through the wire passing path of the outer wall of the skeleton via the small opening slots and then merge with the other-phase winding into the large opening slot.

[0023] A motor stator, having a motor skeleton with the above structure.

[0024] Further, it includes several stator cores arranged in a circular ring, a positive-end skeleton is provided at the top of the stator core, a negative-end skeleton is provided at the bottom of the stator core, the skeleton bases of the positive-end skeleton and the negative-end skeleton are attached to the end faces of the stator core, the enameled wire winding is wound on the positive and negative-end skeletons, and insulating paper is provided between the inner side surface of the stator core and the enameled wire winding;

[0025] The enameled wire winding has an inlet end for the lead wire and an outlet end for the neutral point wire. The inlet end is fixed on the outer wall of the skeleton through an opening slot. The lead wire side wiring is arranged between the inner wall and the outer wall of the skeleton. The neutral point wire extends to the outer side of the outer wall of the skeleton through a small opening slot. After passing through the wire passing path on the outer side of the outer wall of the skeleton, it winds back between the inner wall and the outer wall of the skeleton through a large opening slot and is fixed by tying wires. A neutral point sleeve is sleeved on the neutral point wire between the inner wall and the outer wall of the skeleton. A through hole for connecting the neutral point is opened on the outer wall of the skeleton.

[0026] An electric motor has a motor skeleton with the above-described structure.

[0027] An electric motor has a motor stator with the above-described structure.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. The outlet end of the enameled wire winding is fixed on the large and small opening slots on the outer wall of the skeleton, solving the risk of cross-phase contact of the copper wire caused by the movement of the copper wire, saving the operation time for sorting and fixing the copper wire in the existing structure, and reducing the wiring operation time of a single stator from 90 seconds to 30 seconds.

[0030] 2. The neutral point wire passing is located on the outer wall side, realizing the isolation between the enameled wire winding and the neutral wire, and eliminating the risk of cross-phase discharge of the neutral wire.

[0031] 3. The neutral point transition sleeve is saved, and at the same time, the process of passing the neutral point wire through the pipe is omitted, reducing the material cost and manufacturing cost by 1.5 - 2.0 yuan.

[0032] 4. The adjacent three-phase windings are connected to a neutral point. Two of them pass through the outer wall wire passing path via the small opening slot and are grouped with the remaining one-phase winding in the large opening slot, solving the problems of too many neutral points, too large neutral point wire heads, difficult operation, and poor appearance of the motor in the original Y-type connection method. When the wire diameter of the copper wire is greater than Φ0.8 and the number of neutral point wires is greater than or equal to 9, greater effects are reflected. Description of the Drawings

[0033] Figure 1 It is a schematic structural diagram of the motor stator described in the present invention.

[0034] Figure 2 It is a schematic structural diagram of the motor skeleton described in the present invention.

[0035] Figure 3 It is a side view of the motor skeleton described in the present invention.

[0036] Figure 4 It is a top view of the motor skeleton described in the present invention. Detailed Embodiments

[0037] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0038] See Figures 1 to 4 , a motor skeleton according to the present invention includes a skeleton outer wall 18, and a plurality of skeleton bases 16 are evenly arranged along the bottom of the inner side surface of the skeleton outer wall 18. One end of the skeleton base 16 is connected to the skeleton outer wall 18, and the other end of the skeleton base 16 extends inward, and a skeleton inner wall 17 is provided at the extended end;

[0039] A plurality of large opening grooves 12 and small opening grooves 13 are formed along the circumference of the skeleton outer wall 18. A wire passing path 11 is provided on the outer side surface of the skeleton outer wall 18, and a through hole 14 for avoiding the wire passing path 11 is provided below the wire passing path 11.

[0040] The large opening grooves 12 and the small opening grooves 13 are evenly distributed along the circumference of the skeleton outer wall 18, and two small opening grooves 13 are provided between any two adjacent large opening grooves 12;

[0041] Let the width of the large opening groove 12 be B1, the width of the small opening groove 13 be B2, the number of slots of the stator be S, and the wire diameter of the stator winding be φ, then there is

[0042] The width B1 range of the large opening groove 12 is: 3×φ≤B1≤S - 1;

[0043] The width B2 range of the small opening groove 13 is: 1.5×φ≤B2≤4×φ.

[0044] The included angle between the center line of the small opening groove 13 of the skeleton outer wall 18 and the center line of the slot teeth of the stator is A, and the number of slots of the stator is S, then there is

[0045] (1 / 4)×360 / (S×2)≤A≤(3 / 4)×360 / (S×2).

[0046] The wire passing path 11 is limited by an upper protrusion 9 located at the top of the outer side surface of the skeleton outer wall 18 and a lower protrusion 10 located at the bottom of the outer side surface of the skeleton outer wall 18;

[0047] Let the distance between the lower end surface of the upper protrusion 9 and the upper end surface of the lower protrusion 10 be C, the distance between the upper end surface of the lower protrusion 10 and the stator core 1 be E, and the wire diameter of the stator winding be φ. The wire diameter is φ, then there is

[0048] C≥(S / 2)×φ, E>φ.

[0049] A wiring structure of a stator, including a motor skeleton with the above structure, a neutral point is arranged on the outer surface of the skeleton outer wall 18, after the wiring 15 of the neutral point passes through the wire passing path 11 on the outer surface of the skeleton outer wall 18, it is placed between the skeleton inner wall 17 and the skeleton outer wall 18 of the motor skeleton.

[0050] Adjacent three-phase windings are connected to a neutral point. Among them, two-phase windings pass through the wire passing path 11 of the skeleton outer wall 18 via the small opening slot 13 and then merge with the other-phase winding into the large opening slot 12.

[0051] Embodiment 1

[0052] A motor stator, having a motor skeleton with the above structure, includes a plurality of stator cores 1 arranged in a circular ring. A positive-end skeleton is provided at the top of the stator core 1, and a negative-end skeleton is provided at the bottom of the stator core 1. The skeleton bases 16 of the positive-end skeleton and the negative-end skeleton are attached to the end faces of the stator core 1. The enameled wire winding 2 is wound around the positive and negative end skeletons. Insulating paper 5 is provided on the inner side of the stator core 1 and the enameled wire winding 2;

[0053] The enameled wire winding 2 has an inlet end 6 for lead wires and an outlet end 7 for neutral point wires. The outlet end 7 is fixed in the large opening slot 12 or the small opening slot 13. The lead wire side wiring is arranged between the skeleton inner wall 17 and the skeleton outer wall 18. The neutral point wire extends to the outer side of the skeleton outer wall 18 through the small opening slot 13, and after passing through the wire passing path 11 on the outer side of the skeleton outer wall 18, it winds back between the skeleton inner wall 17 and the skeleton outer wall 18 through the large opening slot 12 and is fixed by tying wires. A neutral point sleeve 8 is sleeved on the neutral point wire between the skeleton inner wall 17 and the skeleton outer wall 18. A through hole 14 for connecting the neutral point is opened on the skeleton outer wall 18.

[0054] Embodiment 2

[0055] A motor is composed of a stator core 1, an enameled wire winding 2, a positive-end skeleton 3, a negative-end skeleton 4, insulating paper 5, and wiring. The number of stator slots S is 9 slots, and the wire diameter W of one type is Φ0.8. The enameled wire winding 2 is wound around the positive and negative end skeletons and has an inlet end 6 and an outlet end 7. Due to the winding sequence, the position of the copper wire at the inlet end 6 can be fixed, and the copper wire at the outlet end 7, which belongs to the end of the winding, floats on the surface of the coil and is easy to move. The positive-end skeleton 3 and the negative-end skeleton 4 are composed of a skeleton base 16, a skeleton inner wall 17, and a skeleton outer wall 18. On the outer wall 18 of the positive-end skeleton 3, an opening slot is provided on one side of the tooth groove center line (on the moving wire side of the enameled wire winding), and the angle A between the opening slot and the center line satisfies (1 / 4)×360° / (S×2)≤A≤(3 / 4)×360° / (S×2). When the number of stator slots S is 9, 5°≤A≤15°, and the preferred angle A is set to 7°.

[0056] The width B of the opening groove on the outer wall 18 of the positive terminal skeleton 3 satisfies 1.5×W≤B≤S - 1. When the wire diameter W is Φ0.8, 1.2≤B≤8, and the preferably set width of the opening groove is 2.5mm.

[0057] On the outer side of the outer wall 18 of the positive terminal skeleton 3, there are an upper protrusion 9, a lower protrusion 10, and a wire passing path 11 formed between the upper and lower protrusions. Preferably, the distance between the upper end surface of the lower protrusion 10 and the iron core is set to 5mm, the preferably width of the wire passing path is 4.5mm, and the height of the protrusion is 1.5mm.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A motor skeleton, characterized in that: It includes a skeleton outer wall (18), and a number of skeleton bases (16) are evenly arranged along the bottom of the inner side of the skeleton outer wall (18). One end of the skeleton base (16) is connected to the skeleton outer wall (18), and the other end of the skeleton base (16) extends inward, and a skeleton inner wall (17) is provided at the extended end; A number of large opening slots (12) and small opening slots (13) are provided along the circumference of the skeleton outer wall (18). A wire passing path (11) is provided on the outer side surface of the skeleton outer wall (18), and a through hole (14) for avoiding the wire passing path (11) is provided below the wire passing path (11); The large opening slots (12) and the small opening slots (13) are evenly distributed along the circumference of the skeleton outer wall (18), and two small opening slots (13) are provided between any two adjacent large opening slots (12); Let the width of the large opening slot (12) be B1, the width of the small opening slot (13) be B2, the number of slots of the stator be S, and the wire diameter of the stator winding be φ, then The range of the width B1 of the large opening slot (12) is: 3×φ ≤ B1 ≤ S - 1; The range of the width B2 of the small opening slot (13) is: 1.5×φ ≤ B2 ≤ 4×φ; The included angle between the center line of the small opening slot (13) of the skeleton outer wall (18) and the center line of the slot teeth of the stator is A, and the number of slots of the stator is S, then (1 / 4)×360 / (S×2) ≤ A ≤ (3 / 4)×360 / (S×2); The wire passing path (11) is formed by being limited by an upper protrusion (9) located at the top of the outer side surface of the skeleton outer wall (18) and a lower protrusion (10) located at the bottom of the outer side surface of the skeleton outer wall (18); Let the distance between the lower end surface of the upper protrusion (9) and the upper end surface of the lower protrusion (10) be C, the distance between the upper end surface of the lower protrusion (10) and the stator core (1) be E, and the wire diameter of the stator winding be φ, then C ≥ (S / 2)×φ, E > φ.

2. A wiring structure of a stator, characterized in that: Adopt the motor skeleton as described in claim 1, The neutral point is arranged on the outer surface of the skeleton outer wall (18). After the wiring (15) of the neutral point passes along the wire passing path (11) on the outer surface of the skeleton outer wall (18), it is placed between the skeleton inner wall (17) and the skeleton outer wall (18) of the motor skeleton.

3. The wiring structure of the stator according to claim 2, characterized in that: Adjacent three-phase windings are connected to a neutral point. Among them, two-phase windings pass through the wire passing path (11) of the skeleton outer wall (18) via the small opening slot (13) and then merge with the other-phase winding into the large opening slot (12).

4. A motor stator, characterized in that: Have the motor skeleton as described in claim 1.

5. The motor stator according to claim 4, wherein: It includes a number of stator cores (1) arranged in a circular ring. A positive-end skeleton is provided at the top end of the stator core (1), and a negative-end skeleton is provided at the bottom end of the stator core (1). The skeleton bases (16) of the positive-end skeleton and the negative-end skeleton are attached to the end faces of the stator core (1). The enameled wire winding (2) is wound on the positive and negative-end skeletons, and insulating paper (5) is provided between the inner side surface of the stator core (1) and the enameled wire winding (2); The enameled wire winding (2) has an inlet end (6) for the lead wire and an outlet end (7) for the neutral point wire. The outlet end (7) is fixed in the large open slot (12) or the small open slot (13). The lead wire side connection is arranged between the inner wall (17) and the outer wall (18) of the skeleton. The neutral point wire extends to the outer side of the outer wall (18) of the skeleton through the small open slot (13). After passing through the wire passing path (11) on the outer side of the outer wall (18) of the skeleton, it winds back between the inner wall (17) and the outer wall (18) of the skeleton through the large open slot (12) and is fixed by tying. A neutral point sleeve (8) is sleeved on the neutral point wire between the inner wall (17) and the outer wall (18) of the skeleton. A through hole (14) for connecting the neutral point is opened on the outer wall (18) of the skeleton.

6. A motor, characterized in that: Having the motor skeleton as described in claim 1.

7. A motor, characterized in that: Having the motor stator as described in claim 5.

Images