JPH0232866B2 - DENDOKI - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention provides the following advantages: by rotating the cutter,
This relates to electric motors used in cooking devices for grinding fruit juices, solid matter, and making minced meat and fish.

Structure of conventional example and its problems The electric motor used in conventional cooking appliances etc. is shown in Figure 1~
It was constructed as shown in FIG. That is,
In the figure, 1 is the cooking device main body, 2 is the cooking device main body 1
3 is a back plate that closes the lower end opening of the cooker main body 1;
This electric motor 3 is installed inside the cooker and fixed to the cooking device main body 1 with screws 4, and this electric motor 3 includes a rotor 5, a stator 6, a commutator 7 attached to the rotor 5, a bracket A8, and a bracket B.
9. The bracket A8 and the bracket B9 rotatably support the rotor shaft 11 via an oilless metal 10 at their central portions. Said oil-less metal 1
0 is inserted between the metal presser 12 and the brackets A8 and B6, and the metal presser 12 is inserted between the brackets A8 and B9.
It is fixed by caulking with rivets 13. Further, the brackets A8 and B9 are fixed to the stator 6 by rivets 14. Reference numeral 15 denotes a carbon brush for passing current through the commutator 7, and this carbon brush 15
is slidably held within a metal brush guide 16, and is urged by a spring 17 so as to be in constant pressure contact with the commutator 7. A holder 18 holds the end of the spring 17. 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 a wiring board attached to the bracket B9 with rivets 20, as shown in FIGS. 3 and 4. By fixing the motor terminal 21 and the brush guide 16 to this wiring board 19, other Electrically insulated from other parts. As a result, bracket A8,
This prevents short circuit current from flowing from the brush guide 16 to the bracket B9, rotor 5, and stator 6. Reference numeral 22 denotes a fitting protrusion integrally molded on the cooker main body 1, and 23 denotes a connector having a cylindrical threaded portion 24 insert-molded. The connector 23 is rotated by operating the electric motor 3, and air flows in the direction indicated by the arrow by the action of the fan 25.

However, in the above conventional configuration, when the holder 18 that holds the end of the spring 17 is fixed to the end opening of the brush guide 16, as shown in FIG. By integrally forming the fixing member 26 to extend, and bending both ends of the fixing member 26 downward to sandwich both sides of the holder 18, both 1
6 and 18, the fixing work takes time. In addition, in order to replace the carbon brush connected to the holder, the fixing member 26 of the brush guide 16 must be operated to straighten the bend, and the carbon brush must be straightened again. If the bending operation is repeated many times, the fixing member 26 will break and become unusable.

Purpose of the Invention In view of the above-mentioned problems of the conventional art, the present invention is designed to facilitate the work of fixing a holder that holds the end of a spring to the end opening of a brush guide, and to replace the carbon brush connected to the holder. Another object of the present invention is to provide an electric motor that can be easily operated without breaking the fixing member as in the prior art.

Structure of the Invention In order to achieve the above-mentioned object, the present invention is located at an end opening of a rectangular brush guide that slidably guides a carbon brush, and is connected to the carbon brush and has an end portion of a spring. The holder to be held is sized to fit inside the rectangular brush guide, and a cut-and-raised part is provided on the side of the holder so that the cut-and-raised end face faces opposite to the commutator surface, and a cut-and-raised part of the holder is provided on the side of the brush guide. A hole is cut and raised into which the holder is removably inserted. According to this configuration, when the holder is fixed to the end opening of the brush guide, the holder is inserted into the brush guide from the end opening of the brush guide. When the cut and raised part reaches the hole in the brush guide by pushing against the force of the spring, the raised part fits into the hole due to its elastic force, and the end face of the cut and raised part fits into the cut and raised part forming the hole. Because they are in contact with each other, the fixing work can be done with just one push of the holder, and even when the holder is removed from the brush guide in order to replace the carbon brush, the cut and raised part of the holder and the brush guide Just by removing the contact with the cut and raised part, the holder will pop out of the brush guide due to the force of the spring, so the replacement work is much easier compared to conventional methods that involve bending and stretching the fixing member. It's easy to do, and
This has various practical effects such as no breakage of the fixing member as in the conventional case.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 7 to 14. FIG. 7 shows a cooking device using an electric motor according to an embodiment of the present invention, and FIG. 8 and FIG. 31 is a back plate that closes the lower end opening; 33 is the cooker main body 3;
The rotor 35 and stator 36 of this electric motor 33 are mounted on a bracket A 37 and a bracket B 38 made of synthetic resin having electrical insulation properties. Retained. The bracket A 37 and the bracket B 38 rotatably support the rotor shaft 40 via an oilless metal 39 at their respective central portions.
Reference numeral 41 denotes a metal presser, and the metal presser 41 uses its elastic force to fix the oil-less metal 39 to the brackets A37 and B38. In addition, the bracket A37 and the bracket B3
8 is fixed to the stator 38 by rivets 42. 43 is a commutator attached to the rotor 35, 44 is a carbon brush for passing current through the commutator 43, and this carbon brush 44 is slidably held by a metal brush guide 45 attached to the bracket B38. , and is always urged by a spring 46 so as to be in pressure contact with the commutator 43. A holder 47 holds the end of the spring 46. By fixing this holder 47 to the end opening of the brush guide 45, the spring 46 is stored in the brush guide 45 in a compressed state. 48 is a motor terminal for wiring attached to bracket B38, and 49 is the bracket A37.
A boss for attaching the back plate integrally formed on the lower end of the 5
0 is an exhaust hole provided in the center of the bracket A37. 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 51 is rotated, so air flows as shown by the arrow due to the action of the fan 53.

As shown in FIGS. 8 and 9, 54 is a tip fitting part that is integrally formed on the upper part of the bracket A37, and a tip holder 55 shown in FIG. 7 is fitted into this tip fitting part 54. It is something to do. In addition, as shown in FIG. 7, the tip pedestal 55 has a cylindrical part 56 insert-molded in the center, and an oil-less metal 57 and an oil seal 58 are installed in this cylindrical part 56. The main shaft 59 supported by the base metal 57 and sealed by an oil seal 58 has a coupling portion 60 coupled to the connector 51 at its lower end, so that the rotation of the connector 51 transmits power and causes the main shaft 59 to rotate. , the cutter 61 fixed to the upper end of the main shaft 59 is rotated. 62
is a packing attached to the tip base 55, and this packing 62 seals water when the tip 63 is screwed into and attached to the tip base 55. 64 is an installation leg attached to the back plate 32, 65 is a power cord, and 66 is a switch.

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 source connected to the motor terminal 48; 69 is a capacitor lead wire connected to the motor terminal 48; 7
0 is the ground wire of the capacitor.

12 to 14 show the mounting structure when the brush guide 45 is mounted on the bracket B38 and the fixing structure of the holder 47 fixed to the end opening of the brush guide 45. As shown in the figure, the mounting leg 72 is configured in a rectangular shape without a bottom surface, and has a cut-and-raised piece 71 on the lower surface that is open at the top on the side.
The bracket B38 is provided with a plurality of opposing holes 73 into which the mounting legs 72 of the brush guide 45 are removably inserted. Further, the holder 47 connected to the carbon brush 44 is configured in a U-shape and is sized to fit inside the brush guide 45.
Further, cut and raised portions 74 whose cut and raised end faces face the side opposite to the commutator 43 surface are provided on both side surfaces. Further, holders 4 are provided on both sides of the brush guide 45.
A hole 75 is provided in which the cut and raised portion 74 of No. 7 is removably inserted.
It is constructed by providing a cut-and-raised portion 76 on the opposite side to the three sides.

In the above configuration, when fixing the holder 47 to the brush guide 45, first fix the holder 47 to the brush guide 45.
After inserting the carbon brush 44 into the brush guide 45, the holder 47 is inserted into the brush guide 45 while pushing the spring 46. During this insertion, the cut and raised portion 74 of the holder 47 is pushed inwards against its elastic force. It enters the brush guide 45 while being bent, and the cut and raised portion 74 fits into the hole 75 of the brush guide 45.
When it reaches this point, the cut and raised portion 74 expands outward due to its elastic force and fits into the hole 75 of the brush guide 45. In this case, since the holder 47 is pushed outward by the spring 46, the cut-and-raised portion 74 of the holder 47 hits the cut-and-raised portion 76 of the brush guide 45 and is fixed. Further, as shown in FIG. 13, the holder 47 is provided with a protrusion 77 on the upper and lower surfaces, and by bringing the protrusion 77 into contact with the open end surface of the brush guide 45, the holder 47 can be inserted into the brush guide 45 more than necessary. I try not to get into it. Furthermore, the cut and raised portion 76 of the brush guide 45 serves to prevent the holder 47 from becoming impossible to remove.
If there is no cut-and-raised portion 76 and only the hole 75, the root portion of the cut-and-raised portion 74 of the holder 47 is engaged with the end surface of the hole 75 of the brush guide 45, and the cut-and-raised portion 74 of the holder 47 However, since there is a cut-and-raised portion 76, the end face of the cut-and-raised portion 74 of the holder 47 is attached to this cut-and-raised portion 76. As a result, the base of the cut-and-raised portion 74 of the holder 47 will not engage with the end surface of the hole 75, so the cut-and-raised portion 74 will not break. 47, the brush guide 45 can be easily removed by pushing the cut and raised part 74 of the holder 47 with the tip of a flat head screwdriver, since the contact with the cut and raised part 76 of the brush guide 45 can be released. It is something that can be done.

Effects of the Invention As described above, according to the present invention, when the holder is fixed to the end opening of the brush guide, the holder is pushed into the brush guide from the end opening of the brush guide against the force of the spring. When the cut and raised part reaches the hole in the brush guide, the cut and raised part fits into the hole due to its elastic force, and the end surface of the cut and raised part comes into contact with the cut and raised part that makes up the hole, so the fixing work is done by the holder. This can be done with a one-touch operation by simply pushing in, and even when removing the holder from the brush guide in order to replace the carbon brush, all you have to do is remove the contact between the cut-up part of the holder and the cut-up part of the brush guide. Since the holder pops out of the brush guide due to the force of the spring, replacing the holder is easier than conventional methods that involve bending and stretching the fixed member.
This has various practical effects, such as eliminating the possibility of breakage of the fixing member as in the conventional case.

[Brief explanation of drawings]

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. Figure 5 is a partial side view of the electric motor.
Fig. 6 is a partial perspective view showing how the brush guide and wiring board are installed in the electric motor, Fig. 7 is a longitudinal sectional view of a cooking appliance employing the electric motor according to an embodiment of the present invention, and Fig. 8 is a partial perspective view of the electric motor. A top view, FIG. 9 is a front view of the motor, and FIG. 10 is a bottom view of the motor.
Fig. 11 is a partial side view of the electric motor, Fig. 12 is a partial perspective view of the electric motor, and Fig. 13 is an exploded perspective view showing how the brush guide is attached to the bracket and the holder is attached to the brush guide in the electric motor. , FIG. 14 is a cross-sectional view showing how the holder is attached to the brush guide. 35...Rotor, 38...Bracket, 43
...Commutator, 44...Carbon brush, 45...
Brush guide, 46... Spring, 47... Holder, 74... Cut-and-raised portion of holder, 75...
Hole, 76...Cut and raised portion forming the hole.

Claims (1)

[Claims] 1 A rotor, a commutator provided on this rotor, a carbon brush that is biased by a spring so as to be in constant pressure contact with the commutator in order to flow current through this commutator, and this carbon brush is slidably guided. a rectangular brush guide with an open end, a bracket to which this brush guide is attached, and a bracket located at the end opening of the brush guide, connected to the folded carbon brush, and holding the end of the spring. The holder is sized to fit inside a rectangular brush guide, and a cut-and-raised part is provided on the side surface of the holder so that the cut-and-raised end face faces opposite to the commutator surface, and a cut-and-raised part is provided on the side surface of the brush guide. An electric motor with a cut-and-raised hole into which the cut-and-raised part of the holder is removably inserted.