CN1076533C - Electric motor - Google Patents

Abstract

It is an object of the present invention to provide a motor capable of shortening the circumference of a coil and mechanically assembling it by forming a coil end portion by assembling a coil cover. The insulating portion 26 is formed in the upper and lower end faces 22a of the laminated stator core 20 and the slot 23, and the coil 42 is inserted into the slot 23. Then, the upper coil cover 31 whose internal cross section is formed to shape the coil end 43 is assembled from above, and the lower coil cover 40 is assembled from below, and the lead wire 52 is connected to the terminal 57 provided on the upper coil cover 31 .

Description

motor

The invention relates to an electrical machine having a stator core around which coils are wound.

Fig. 15 shows, for example, an existing motor disclosed by Japanese Patent Publication No. 62-37407. In the figure, 1 is a stator core formed by laminating a plurality of silicon steel sheets, and a plurality of grooves 2 are arranged in its inner peripheral edge portion. Insert insulating paper 3 into each slot 2, and install the coil 4 through the insulating paper 3. 5 and 6 are a pair of coil covers, which are used to cover the coil ends of the coil 4 protruding from both sides of the stator core 1 Parts 4a, 4b, the coil covers 5 and 6 are formed of insulating materials such as plastic, and are formed by ring-shaped end plates 11 and 12 respectively to connect one end side of the inner cylinder parts 7, 8 and the outer cylinder parts 9, 10 into one body. A space 13 for accommodating coils in a bottom ring shape is formed between the two cylindrical parts.

9a, 10a are planes formed at intervals on the outer peripheral surfaces of the outer tube parts 9, 10 of the above-mentioned coil covers 5, 6; The flat surface 9a formed integrally is arranged protrudingly. Reference numeral 16 designates a plurality of frame-shaped connecting pieces corresponding to the joined portion, and extends integrally with the flat surface 10 a of the outer cylinder portion 10 of the coil cover 6 corresponding to the joining claws 15 .

The existing motor is constituted as above, the coil ends 4a, 4b of the coil 4 are put into the space 13 for accommodating the coil of the coil cover 5, 6, and the two coil covers 5, 6 are covered on both sides of the stator core 1. On the side, the outer cylindrical parts 9, 10 are combined with the outer peripheral surface of the stator core 1, and at the same time, the front ends of the inner cylindrical parts 7, 8 are brought into contact with the end surface of the stator core 1. And, the above-mentioned frame-shaped connecting piece 16 is hooked to the coupling claw 15 to connect the two coil covers 5, 6 to each other. Then, in a state where the coil ends 4a, 4b are covered by the coil covers 5, 6, the whole is immersed in, for example, a varnish tank or the like to perform a varnish dipping process.

In the existing motor of the above structure, there are the following problems:

1. Increase the circumference of the coil and increase the consumption of the coil, thereby increasing the manufacturing cost.

Since the insulating paper 3 is inserted into the groove 2, and the coil 4 is inserted through the insulating paper 3, the part of the insulating paper 3 inevitably increases the circumference of the coil, thereby increasing the cost of materials and assembly.

2. Since the insulating paper 3 is used, the cost is increased.

3. Poor characteristics.

As the circumference of the coil is longer, the magnetic flux density increases and the efficiency decreases, thereby deteriorating the characteristics such as rotation and torque.

4. Since the varnish must be dipped, the assembly cannot be mechanized.

Since the two coil covers 5, 6 are connected to each other, they must be dipped into a varnish tank or the like for dipping treatment, so they cannot be assembled mechanically.

The present invention is made in order to solve the above-mentioned problems, and purpose is to provide a kind of motor, and this motor has following advantage:

1. The coil circumference is short and the coil consumption is small, which can reduce the cost;

2. No need for insulating paper;

3. Good features:

4. It is not necessary to carry out dipping treatment;

5. The mechanization of assembly can be realized.

The motor of the present invention has a stator core, a coil, and a coil cover; the stator core is provided with a plurality of slots, and the coil is wound in the slots of the stator core; Inner peripheral part and outer peripheral part: It is to insulate the slot and end face of the above-mentioned stator core with insulating material, wind the self-fused wire in the slot, and wrap the coil end with a coil cover whose inner wall shape is made roughly the same as the coil end. fully covered.

In addition, the upper and lower end surfaces of the stator core protrude from the sides, and the coil cover is provided with coupling claws that are coupled to the coupling portion as the coupling portion of the coil cover.

Stator cores are formed in laminations, and holes penetrating in the lamination direction are formed in the stator cores.

A cylindrical portion protrudes from the outer periphery of the stator core, and a notch is formed in the cylindrical portion.

A concave opening facing the groove is provided on the inner periphery of the coil cover.

In the first invention of the present application, the self-fused electric wire constituting the coil is wound in the slot and the slot of the stator core whose end surface is insulated by an insulating material, and the coil end of the coil is formed inside the coil cover, and simultaneously passed The coil cover is fitted to the stator core by pressing the coil cover onto the stator core to clamp the coil.

In the second invention, the coil cover can be attached to the stator core by coupling the coupling claws of the coil cover to the coupling portions protruding from the upper and lower end surfaces of the stator core.

In the third invention, when the stator core is insulated with the insulating material, the resin used as the insulating material flows into the hole from the opposite side of the gate, and the insulating material also flows toward the gate.

In the fourth invention, since the jig for pressing the coil end on the cylindrical portion is inserted through the cutout, the coil cover can be attached while pressing the coil end inward.

In the fifth invention, since the jig for pressing the coil end on the cylindrical portion is inserted through the opening, the coil cover can be attached while pressing the coil end outward.

Fig. 1 is the assembly oblique view showing the motor of one embodiment of the present invention,

Fig. 2 is the assembly oblique view showing the motor of an embodiment of the present invention,

Fig. 3 is a plan view showing a stator core according to an embodiment of the present invention,

Fig. 4 is a sectional view showing a stator core according to an embodiment of the present invention,

Fig. 5 is a plan view showing a stator core formed from an insulating material according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view showing a stator core formed from an insulating material according to an embodiment of the present invention,

Fig. 7 is an assembled plan view of the stator core after the insulation cover is assembled according to one embodiment of the present invention,

Fig. 8 is an assembled cross-sectional view showing a stator core after the coil cover is assembled according to an embodiment of the present invention,

Fig. 9 is an assembled bottom view of the stator core after the coil cover is assembled according to an embodiment of the present invention,

Fig. 10 is a cross-sectional view showing an assembled part of a stator core fixed by wedges according to an embodiment of the present invention,

Fig. 11 shows an embodiment of the present invention, a is a plan view of the upper coil cover, b is a cross-sectional view of the part shown along the arrow,

Fig. 12 is a side view showing an embodiment of the present invention including a half-sectional view of an upper coil cover,

Fig. 13 is a plan view showing a lower coil cover of an embodiment of the present invention,

Fig. 14 is a side view showing an embodiment of the present invention including a half-sectional view of a lower coil cover,

Fig. 15 is an exploded perspective view showing a conventional motor.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1～Fig. 14 is the figure that shows an embodiment of the present invention, and 20 is stator iron core, is to roll into the electrical steel plate of annular shape, with high-speed automatic press machine (not shown in the figure) on inner peripheral side 21 and The rotor described later is separately punched out together, and at the same time, is laminated by riveting to form a predetermined thickness. Reference numeral 22 denotes a coupling portion formed by protruding the upper and lower end faces 22a of the stator core 20 from the side during lamination, and a plurality of joints can be provided in conjunction with ends of the coil cover described later. The joining part is in the metal mold (not shown in the figure) of the high-speed automatic press, for example, when laminating the core plates composed of plate thicknesses of 0.35 mm or 0.5 mm, use the metal mold (not shown in the figure) The punch is punched into two shapes, and one or more of the upper and lower end faces constitutes a protrusion, which is automatically formed by layer thickness or layer management. Numeral 23 denotes slots, a plurality of which are provided at equal intervals from the inner peripheral side 21 of the stator core 20 toward the outer peripheral direction, and magnetic pole pieces 24 are provided between the slots 23 .

Numeral 25 denotes holes, and a plurality of holes are provided on the outer periphery of the stator core 20 at equal intervals along the stacking direction in the stator core 20 . 26 is an insulating part provided by injection molding, for covering the stator core 20, and is molded and fixed to the slot 23 and the upper and lower end faces 22a. 27 is a coil protection ring, which is composed of a cylindrical portion 28 protruding in a chimney shape from the outer periphery of the stator core 20 integrally with the insulating portion 26 of the stator core 20, and a plurality of notches 29 are provided at the front end thereof. This coil protection ring is to prevent the coil from loosening after the coil described later is wound into the slot 23 of the stator core 20 . The notch 29 is a space for pressing the coil toward the center of the stator core 20 with a coil pressing jig when the coil cover described later is mounted on the stator core 20 .

30 is a coil cover, and 31 is an upper coil cover for a terminal block. One side of the coil cover 30 is formed into a disc shape that can cover the upper end surface 22a of the stator core 20 by injection molding with insulating resin. 32 is a convex portion provided on the upper coil cover 31, as shown in FIG. 11, its front end is bent into an inverted L shape for fixing the terminals described later. 33 is a pin provided on the upper coil cover 31, which is used to fix a thermal fuse not shown in the figure and a jumper wire described later. 34 is a first groove, which is provided so as to surround the inner peripheral side of the upper coil cover 31 with a side wall 35, and is used for conducting wire wiring described later. 36 is an opening provided on the inner peripheral wall of the upper coil cover 31, the width of which is the same as that of the groove 23, and a plurality of openings 36 are provided on the inner peripheral wall. These openings are opposed to the slots 23 when mounted on the stator core 20, and these openings are spaces where the coils are pressed to the outside of the stator core 20 by a coil pressing jig when the upper coil cover 31 is mounted on the stator core 20. 34a is the second groove, which is arranged on the outer peripheral upper part of the upper coil cover 31, has a width larger than the wire diameter of the enameled wire, and is provided with multiple grooves for coil positioning.

37 is a step portion, which is located at the lower part of the inner wall of the upper coil cover 31, and is fixed to the stator core 20 by pressing the wedge described later with a concave surface. 38 is a connecting piece, which extends downward from the outer peripheral wall of the upper coil cover 31, and has an engaging claw 39 bent into an L shape at the front end, and a plurality of connecting pieces 38 are arranged at equal intervals. The inside of the above-mentioned upper coil cover 31 is formed in a "U"-shaped cross-section that enables the coil end described later to be formed. 40 is a lower coil cover which forms the other side of the coil cover 30 and is formed into a disc shape by injection molding with insulating resin to cover the lower end surface of the stator core 20 . The lower coil cover 40 is the same as the upper coil cover 31 , and has a "U"-shaped cross section inside. 41 is a hole, and a plurality of holes are provided at equal intervals on the lower coil cover 40 for checking the condition of the coil.

In addition, the lower coil cover 40, like the upper coil cover 31, has an opening 36, a connecting piece 38, and a step portion 37. 42 is a coil, which is composed of an enameled wire coated with a self-fusible material, and is wound around the groove 23 and the end surface. In the slot 23 of the stator core 20 insulated by an insulating material, the coil end of the coil is formed inside the coil cover 30, and the coil 42 is clamped by squeezing the coil cover 30 to the stator core 20, while the coil The cover 30 is fitted onto the stator core 20 . 43 is a coil end, and 44 is a wedge inserted into the slot 23 to press and fix the coil cover 30 on the stepped portion 37 of each cover 31, 40 from the vertical direction when assembling the coil cover 30 to the stator core 20. 45 is a rotor provided in the said stator core 20, and the rotating shaft 46 penetrates and fits in the center. Reference numeral 47 denotes a bearing fitted to the rotary shaft 46, and is composed of, for example, a ball bearing.

48 is a casing, 49 is a machine frame forming one side of the casing, a rotating shaft hole (not shown) is provided in the center of the casing, and a joint edge 50 is provided at its peripheral end. 51 is the frame forming the other side of the casing 48. The bracket has a joint edge 50 at its peripheral end, and a wire hole 52 is provided inside the joint edge 50. 53 is a lead wire for a power supply, which is made of, for example, a heat-resistant nylon wire. 54 is an insulating tube for protecting the wire, made of a flexible insulating material such as polyethylene. Reference numeral 55 is a lead sleeve through which the insulating tube penetrates and fits into the lead hole 52, and is made of, for example, resin. 56 is a jumper wire which connects the terminals 57 fixed between the convex parts 32 of the upper coil cover 31, and consists of a single lead wire, for example. 58 is an input and output line formed by the start and end of the coil 42 .

In the motor with the above structure, its assembly is to use a high-speed automatic press to punch the rolled electrical steel plate into the stator core 20 and the rotor 45, and the laminates have a specified thickness, and the laminates are fixed by methods such as riveting. Then, clean the stator core 20 with a cleaning solution to remove oil, and heat it to about 150° C. with a heating medium, and use an injection molding machine (not shown in the figure) to integrate the upper and lower end faces 22a and the groove 23 with an insulating material. The insulating portion 26 is formed. After forming, deburr the separated part, and coat the inner peripheral surface with antirust agent.

Then, the coil 42 is wound on the winding machine fixture (not shown) with a roll-off type winding machine (not shown), and this coil 42 is inserted in the groove 23, and the wedge 44 is inserted into the groove 23 at the same time. Inside. Then, intermediate forming of the coil end portion 43 is performed. After forming, the stator core 20 with the coil 42 is mounted on an assembly frame not shown in the figure, the input and output wires 58 of the coil 42 are temporarily fixed, and the upper coil cover 31 is fixed by the combination of the joint part 22 and the joint claw 39 to the stator core 20. Then, after assembling the terminal 57 to the upper coil cover 31 and connecting and fixing the above-mentioned input/output wire 58 to the terminal 57 , the end of the input/output wire 58 is cut off.

The lower coil case 40 is assembled to the lower end surface of the stator core 20 in the same manner as the upper coil case 31 is assembled. And, by bringing an electrical inspection contact (not shown) into contact with the terminal 57, an electrical inspection is automatically performed. Then, by applying a specified voltage to a specified position of the terminal 57, the coil 42 is energized, and the self-fusing varnish attached to the surface of the enameled wire is melted by the generated heat, thereby fixing the coil 42 .

Then, the stator core 20 with the coil cover 30 is pressed into the machine frame 49 , and the rotor 45 with the bearing 47 is inserted into the stator core 20 . After assembling a washer not shown in the figure to the shaft 46 of the rotor 45, various inspections are performed. Then, the jumper wire 56 and the temperature fuse are installed on the upper coil cover 31, and the lead including the lead 53 for power supply is connected to the terminal 57. And, each charged portion is insulated with putty (not shown in the figure). Then, the bracket 51 is assembled on the stator core 20 , and the frame 49 and the bracket 51 are combined and fixed by riveting the joint edge 50 of the frame 49 . Then, the wire 53 is passed through the insulating tube 54 while being fitted to the bracket 51 together with the wire sleeve 55 .

In the above assembly process, the upper and lower coil covers 31, 40 are assembled to the stator core 20 because the end face of the stator core 20 is insulated from the slot 23, and the self-fusion wire is wound, and the slot adjustment, Processes such as dipping treatment and shaping of the coil end 43 can shorten the circumference of the coil 42, make the coil 42 easy to fix, and finally realize the mechanization of assembly. Furthermore, the coupling portion 22 of the stator core 20 and the coupling claw 39 of the coil cover 30 are utilized, so that the coil cover 30 can be easily assembled to the stator core 20 and the fixing structure of the coil cover 30 can be simplified. In addition, by using the holes 25 of the stator core 20, the resin of the insulating material flows more efficiently to the side opposite to the gate than along the surface inside the groove 23 of the stator core 20, thereby improving fluidity. In addition, it can be formed under low pressure, and no burrs will occur after forming, and thin layer forming can be performed.

By providing the first groove 34 and the protrusion 32 in the upper coil cover 31, the positioning of the lead wire 53 and the terminal 57 can be performed, and mechanization can be easily realized. Moreover, by providing the second groove 34a, the positioning of the enameled wire terminal can be easily performed, and mechanization can be easily realized. In addition, the wedge 44 can be held by the steps 37 of the respective coil covers 31 and 40 .

Since the present invention adopts the above structure, it has the following effects.

In the first invention, by forming the coil end inside the coil cover and pressing it against the stator core, the coil can be clamped and formed, so that mechanization of assembly can be realized.

In the second invention, the coil cover can be attached to the stator core by the coupling between the coupling portion and the coupling claw, and the shape of the coupling claw can be simplified.

In the third invention, the resin used as the insulating material has good fluidity in the holes, so that uniform thin-layer molding can be performed on the stator core.

In the fourth invention, the coil cover can be assembled while pressing the coil from the outer periphery of the coil end, so that the outer periphery of the coil end can be prevented from being caught by the coil cover.

In the fifth invention, the coil cover can be assembled while pressing the coil from the inner periphery of the coil end, so that the inner periphery of the coil end can be prevented from being caught by the coil cover.

Claims (5)

1. A kind of motor, it has stator core (20), coil (42) and coil cover (30); Stator core is provided with a plurality of grooves (23), and coil is wound in the groove of this stator core; Coil cover is made of Cylindrical structure, there are inner and outer peripheral parts that can cover the coil end (43) of the coil (42), and it is characterized in that the coil cover (30) is composed of an upper coil cover (31) and a lower coil cover (40) Composition, it is to insulate the slot (23) and the end face of the above-mentioned stator core (20) with insulating material, and the self-fused wire is wound in the slot, and the inner wall combined with the inner peripheral part and the outer peripheral part is the required coil end. At least one coil cover (30) with approximately the same external shape is fixed on the end face of the stator core in the up-down direction, and the components (27, 28, 29) fixing the ends of the coil are integrally formed with the stator core. 2. The motor according to claim 1, characterized in that: the upper and lower end faces (22a) of the stator core protrude from the side, as the joint part (22) of the coil cover, and the coil cover is provided with a joint that is combined with this joint part. Combine claws (39). 3. The motor according to claim 1, wherein the stator core is formed by stacking layers, and the stator core is provided with holes penetrating through the stacking direction. 4. The motor according to claim 1, characterized in that: a cylindrical portion (28) is protrudingly provided on the outer circumference of the stator core, and a cutout (29) is provided on the cylindrical portion, and the cylindrical portion and The cutouts are all formed integrally with the stator core. 5. The motor according to claim 1, characterized in that a concave opening (36) facing the groove is provided on the inner circumference of the coil cover.

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