JPS6020755A - Motor - Google Patents

Abstract

PURPOSE:To reduce the cost of a motor by wiring the end of coil wirings of a stator at a cut and erected piece formed by cutting and erecting at a brush guide, thereby simplifying the assembling work. CONSTITUTION:A cut and erected piece 74 is formed at a brush guide 45. When the end of coil wirings 67 of a stator 36 is coupled to the guide 45, the end of the wirings 67 is wound in the recess of the piece 74 formed at the guide 45 and soldered. The midway of the coil wirings 67 of the stator 36 is held between two ribs 76 formed integrally with the side and top of a synthetic resin bracket 38.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric motor used in a cooking device that rotates a cutter to grind fruit juice or solid matter, or to make surimi such as naikai. be.

Conventional structure and its problems Electric motors used in conventional cooking appliances and the like have been constructed as shown in FIGS. 1 to 6. That is, in the figure, 1
2 is a back plate that closes the bottom opening of the cooking device main body 1; 3 is an electric motor installed in the cooking device main body 1 and fixed to the cooking device main body 1 with screws 4;
is a rotor 5, a stake 6, a commutator 7 attached to the rotor 6, a placket 88, and a bracket B.
9. The bracket A8 and the bracket B9 rotatably support the rotor shaft 11 via the oilless metal 10 at their respective central portions. The oil-less metal 1° is fixed to the bracket A8 and the bracket B9 by caulking with rivets 13. Still the bracket A8 and the bracket,
B9 is fixed to the stator 6 with rivets 14. Reference numeral 16 denotes a carbon brush for passing current through the commutator 7, and this carbon brush 15 is slidably held within an electrically conductive metal brush guide 16.
Moreover, it is constantly biased by a spring 17 so as to be in pressure contact with the commutator 7. Reference numeral 18 denotes a holder that holds the end of the spring 1. By fixing this holder 18 to the end opening of the brush guide 16, the spring 17 is stored in the brush guide 16 in a compressed state. . 19 is the third
As shown in the figure and FIG.
By fixing the brush guide 16, it is electrically insulated from other parts.

This prevents short-circuit current from flowing from the brush guide 16 to the bracket A8, the bracket B9, the rotor 5, and the stator 6. Reference numeral 22 denotes a fitting protrusion integrally molded on the cooking device main body 1, and 23 denotes a connector in which a cylindrical screw portion 24 is insert-molded.A fan 26 is formed in a part of this connector 23, and A cylindrical threaded portion 24 is screwed onto the low cooling shaft 11, and when the electric motor 3 is operated, the connector 23 is rotated, so that air flows as shown by the arrow due to the action of the fan 25.

However, in the above-mentioned conventional configuration, when connecting the lead wire for passing current from the stator 6 to the carbon brush 15 to the metal brush guide 16, the coil wire 26 of the stator 6 is connected as shown in FIG. Stretch it out and wrap the end directly around the outer periphery of the metal brush guide 16 through the square hole 27 provided in the wiring board 19.
Since the wires were connected to the brush guide 16 by soldering, the work of connecting the coil wires 26 of the stator 6 was extremely troublesome, and therefore extremely unreasonable in terms of cost and assembly workability. Met. In addition, since the coil wire 26 is not held in any way in the middle, there is a problem in that the coil wire 26 vibrates like a string due to vibrations during operation of the electric motor, causing bone fracture and disconnection. Purpose of the Invention In view of the above-mentioned conventional problems, the present invention provides an electric motor which is very rational in terms of cost and assembly workability, and which can prevent disconnections in the middle of the stator coil wire. The purpose is to provide the following.

Structure of the Invention In order to achieve the above object, the present invention connects the end of the stator 0 coil wire to a cut-and-raised piece provided in the brush guide, and connects the middle of the coil wire to a bracket made of synthetic resin. It is integrally molded and held between two ribs. According to this configuration, when connecting the stator coil wire old comb to the plan guide, the cut and raised part of the brush guide is cut and raised. Since the wires are connected in one piece, the assembly process is easier than the conventional method in which the end of the coil wire is wrapped around the outer circumference of the brush guide through a square hole in the wiring board. The stator coil wire is held between two ribs that are integrally molded into a synthetic resin bracket. Therefore, the coil wire does not vibrate like a string due to vibrations during operation of the electric motor, and as a result, it is possible to prevent the coil wire from breaking. As a result, the wiring path of the coil wire can be made clear and constant, so that it is possible to prevent the coil wire from being disconnected at the edges of other parts.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 7 to 13. FIG. 7 shows a cooking device using an electric motor according to an embodiment of the present invention, and FIGS. 8 to 11 show the structure of the electric motor, where 31 is the main body of the cooking device, and 32 is the cooking device. A back plate 33 that closes the opening at the lower end of the main body 31 is installed inside the cooker main body 31 and is attached to the back plate 3 by screws 34.
2, the rotor 3 of this motor 33
5 and the stator 36 are held by a bracket A37 and a bracket B38 made of synthetic resin having electrical insulation properties such as FRPET or phenol resin. The bracket A 37 and the bracket B 38 support the rotor shaft 40 rotatably through an oilless metal 39 at their central portions. 41
is a metal presser, and this metal presser 41 uses its elastic force to fix the oil-less metal 39 to the bracket A37 and the bracket B38. Further, the bracket A37 and the bracket B3B are fixed to the stator 36 with rivets 42. 43 is the rotor 35
The commutator 44 attached to the commutator 43 is a carbon brush for passing current through the commutator 43. This carbon brush 44 is slidably held by a metal brush guide 45 provided on the bracket B38, and is supported by a spring. 46, the constant commutator 4
3 is biased so as to be pressed against it. 47 is the spring 4
By fixing this holder 47 to the end opening of the brush guide 46, the spring 46 is stored in the brush guide 45 in a compressed state. 48 is a motor terminal for connection attached to the bracket 1-B38, 49 is a boss for attaching the back plate integrally formed at the lower end of the bracket 1-A57, and 5o is provided in the center of the bracket A3'7. This is an exhaust hole. Reference numeral 51 denotes a connector in which a cylindrical threaded portion 52 is insert-molded, a fan 53 is formed in a part of this connector 51, and the cylindrical threaded portion 52 is screwed onto the rotor shaft 40. By operating the electric motor 33, the connector 61 rotates, so that air flows as shown by the arrow due to the action of the fan 53.

54 is a bracket as shown in Figures 8 and 9) A3
A tip fitting part 54 is integrally formed on the upper part of the tip plate 7, and a tip plate 55 shown in FIG. 7 is fitted into this tip fitting part 54. As shown in FIG. 7, the sinking tip 55 has a cylindrical part 56 insert-molded in the center, and a t-irless metal 67 and an oil seal 58 are installed inside the cylindrical part 56. Hey, this oilless metal 57
The main shaft 59 supported by the main shaft 59 and sealed with an oil seal 58 has a coupling part 6o coupled to the connector 51 at the lower end thereof, so that the main shaft 59 rotates due to the power transmitted by the rotation of the connector 51. The cutter 61 fixed to the upper end of the machine is rotated. 62 is a backing attached to the kelp stand 55, and this banking 62 seals water when the tip 63 is screwed into the tip holder 55. 064 is an installation leg attached to the back plate 32; 65 is a power cord, and 66 is a switch.

In FIGS. 9 and 10, 67 is a coil wire of the stator 36, one end of which is connected to the motor terminal 48, and the other end is connected to the brush guide 45. 68 is a power supply line connected to the motor terminal 48, 69 is a lead wire of a capacitor connected to the motor terminal 48, and 70 is a ground wire of the capacitor.

Fig. 12 shows the structure of the brush guide 46 attached to the bracket B38. A plurality of mounting legs 72 having cut-and-raised pieces 71 are integrally formed to face each other, and
38 is provided with a plurality of opposing holes 73 into which the mounting legs 72 of the brush guide 45 are removably inserted. 7
Reference numeral 4 denotes a cut-and-raised piece provided on the top surface of the brush guide 45, and a portion of this cut-and-raised piece 74 is formed with a four-part 75 by a notch.

FIG. 13 shows how the coil wire 67 of the stator 36 is connected on the bracket B38, and the end of the coil wire 6γ is connected to the cut and raised piece 7 of the brush guide 45.
The coil wires 67 of the stator 36 are connected by winding them around the concave portions 75 of the stator 36 and soldering them, and as shown in FIG. It is held between two lips 76 integrally formed across the upper surface. In this case, in order to prevent the coil wire 67 of the stator 36 from becoming like a string and breaking due to vibrations during operation of the electric motor, the distance between the two ribs γ6 is set at a distance of 1 to 10% of the wire diameter of the coil wire 670. 5
It is about twice the size.

The portion between the two ribs 76 where the coil wire 67 contacts is rounded so as not to damage the coil wire 67.

2 - In the embodiment, when the end of the coil wire 67 of the stator 36 is connected to the brush guide 45, it is wound around the recess γ5 of the cut-and-raised piece 74 provided on the brush guide 45 and soldered. As a result, the coil wire 67 will not come off the cutting and raising piece 74 when the soldering is done, and as a result, the soldering process is made extremely easy and reliable. Moreover, since the cut-and-raised piece 74 is provided on the top surface of the brush guide 45, it can be easily manufactured using a mold. There is a synthetic resin bracket B38 in the middle of the coil wire 67 of the stator 36.
Because it is held between two glue beech 6 pieces that are integrally molded into the
The coil wire 67 does not vibrate like a string due to vibrations during operation of the electric motor, and as a result, breakage of the coil wire 67 due to vibration can be prevented, and the presence of the two ribs 67 Since the wiring path of the coil wire 67 is also made clear and constant, there is no possibility that the coil wire 67 will be disconnected at the edges of other parts.

Effects of the Invention As described above, according to the present invention, when the end of the coil wire of the stator is connected to the brush guide, the wire is connected to the cut and raised piece provided by cutting and raising the brush guide. Compared to the case where the end of the coil wire is wrapped around the outer circumference of the brush guide through a square hole in the wiring board, the assembly process is extremely simple and cost-effective. The middle part of the stator's coil wire is held between two ribs integrally molded into a synthetic resin bracket, so vibrations during motor operation can cause the coil wire to It is impossible for the wire to vibrate like a string, and as a result, it is possible to prevent the coil wire from breaking.Moreover, by providing the two ribs, the wiring path of the coil wire can be prevented. Since the characteristics of the tube are made clear and constant, the coil wire will not be disconnected at the edges of other parts, and the tube will have various practical effects.

[Brief explanation of the drawing]

Figure 1 is a partial longitudinal cross-sectional view of a cooking appliance using a conventional electric motor, Figure 2 is a top view of the electric motor, Figure 3 is a front view showing the internal structure of the electric motor, and Figure 4 is a bottom view of the electric motor. 5 is a partial side view of the motor, FIG. 6 is a partial perspective view showing several states of the brush guide and wiring board in the motor, and FIG. 7 is a motor according to an embodiment of the present invention. FIG. 8 is a top view of the electric motor, FIG. 9 is a front view of the electric motor, FIG. 10 is a bottom view of the electric motor, and FIG.
The figure is a partial side view of the same electric motor, Figure 12 is an exploded perspective view showing several connections of the brush guide to the bracket in the same motor. Figure 13 is a partial side view of the same electric motor. FIG. 3 is a perspective view showing the connection state of coil wires. 35..."" 07 ter, 36...suator, 38...bracket, 43...commutator, 44...carbon brush, 45... Brush guide, 46... Spring, 67... Stake coil wire, 74... Kawakiri-ori and i-7 piece, 7
6. Old 2 ribs.

Claims (1)

[Claims] A rotor, a stator, a commutator provided on the rotor, a carbon brush that is always urged to be in pressure contact with the commutator 61L in order to cause current to flow through the commutator, and this carbon brush is slidably arranged. It is equipped with a metal brush guide that holds the carbon brush and is electrically conductive with the carbon brush, and a synthetic resin bracket on which the brush guide is held, and the ends of the coil wires of the stator are cut and raised to the brush guide. An electric motor is constructed in such a way that the coil wire is connected to a cut-and-raised piece provided at the same time, and the middle of the coil wire is held between two ribs integrally molded on a synthetic resin bracket.