JP3142228U - Shredder motor with soundproofing device - Google Patents

Abstract

A shredder motor having a soundproofing device is provided.
The motor includes a motor soundproof cover that covers the outer surface of the contact portion between the motor rotor and the carbon brush. The motor soundproof cover includes an inner cover and an outer cover that are fitted to each other, and small holes that intersect with each other are provided on the inner cover and the outer cover. In addition to achieving a soundproof effect by sealing the friction position between the motor rotor and the carbon brush using the motor soundproof cover, it also has a fireproof effect that avoids contact between sparks that sometimes occur and the outside. .
[Selection] Figure 2

Description

  The present invention relates to a motor. In particular, it relates to a shredder motor that is used in a shredder and has a soundproofing device.

  In order to prevent leaks of highly confidential files or data to the outside, it is usually processed using a shredder. For this reason, shredders are an indispensable facility for business and home life.

The electric shredder is currently used in the market. The electric shredder is driven by an AC motor, the rotor of the motor and the carbon brush are in elastic contact, and the rotor rotates at high speed by driving the motor.
However, when the motor is energized and operated, the contact between the carbon brush and the motor rotor generates noise.

  The problem to be solved by the present invention is to provide a motor for a shredder including a soundproofing device that solves a shortage of known techniques.

  In order to solve the above problems, the present invention provides a shredder motor including the following soundproofing device. The motor includes a motor rear support frame, a motor rotor, and a carbon brush that elastically contacts the motor rotor, and the motor further includes the motor soundproof cover that covers the outer surface of the motor rotor and the carbon brush contact portion. The soundproof cover includes an inner cover and an outer cover that are fitted to each other, and small holes that intersect with each other are provided on the inner cover and the outer cover, respectively.

  The inner cover and the outer cover of the motor soundproof cover have an annular shape, and a through hole is provided at a position corresponding to the carbon brush on the motor cover so that the carbon brush passes through the through hole. Contact with the motor rotor.

  The front end of the motor soundproof cover passes through the first sealing part, which seals the gap between the motor rotor and the rear end of the motor soundproof cover passes through the second sealing part, which is in contact with the motor rotor. A gap is sealed between the inner cover and the outer cover.

The device of claim 1 includes a motor rear support frame, a motor rotor, and a carbon brush in elastic contact with the motor rotor;
The motor further includes the motor soundproof cover that covers the motor rotor and the outer surface of the carbon brush contact portion, and the motor soundproof cover includes an inner cover and an outer cover that are fitted to each other, and the inner cover and the outer cover. The shredder motor is provided with a soundproofing device characterized in that small holes intersecting each other are provided on the cover.
According to the invention of claim 2, the inner cover and the outer cover of the motor soundproof cover have an annular shape, and a through hole is provided at a position corresponding to the carbon brush on the motor cover. The shredder motor having a soundproofing device according to claim 1, wherein the motor passes through the through hole and contacts the motor rotor.
According to the invention of claim 3, the front end of the motor soundproof cover passes through the first sealing part, which seals the gap between the motor rotor and the rear end of the motor soundproof cover passes through the second sealing part. 3. A shredder motor having a soundproofing device according to claim 2, wherein the motor seals a gap between the motor rotor and the motor rotor.
According to a fourth aspect of the present invention, there is provided a motor for a shredder having a soundproofing device according to the first, second, or third aspect, wherein a gap is provided between the inner cover and the outer cover.

  As described above, the present invention uses a motor soundproof cover and seals the friction position between the motor rotor and the carbon brush, so that when the noise generated by the contact position between the motor rotor and the carbon brush passes through the motor soundproof cover, The mutual crossing of the small holes between the inner cover and the outer cover of the motor soundproof cover creates interference with the sound wave, thereby greatly reducing the sound passing therethrough and achieving a soundproof effect. At the same time, since the present invention is only installed at the noise source position, the volume is relatively small, so that the product cost can be reduced. The present invention also has a fire prevention effect. In other words, since the motor rotor and the carbon brush friction position are likely to generate sparks, sealing the area can eliminate the risk of the sparks coming into contact with the outside world and igniting to cause a fire. Taken together, the present invention has a greater market competitiveness because it has many advantages such as simple structure, low noise, high safety and enhanced practicality compared to current products.

  As shown in FIGS. 1, 2, and 3, the motor of the present invention includes a motor rear support frame 1, a fixing component 2 used for installing the carbon brush 3, a motor rotor 5, and a motor soundproof cover 7.

  The motor soundproof cover 7 isolates the noise generated by the friction between the motor rotor 5 and the carbon brush 3 from the outside, thereby reducing the noise generated by the contact between the motor rotor 5 and the carbon brush 3, and operating the product. The noise at the time can be reduced. The motor soundproof cover 7 is provided on the outer surface of the contact portion between the motor rotor 5 and the carbon brush 3.

  The motor soundproof cover 7 includes an inner cover 71 and an outer cover 72 that are fitted to each other, and small holes 711 and 721 that intersect with each other are provided on the inner cover 71 and the outer cover 72, respectively. Separately, a certain gap is provided between the inner cover 71 and the outer cover 72.

  The inner cover 71 and the outer cover 72 of the motor soundproof cover 7 have an annular shape, and through holes 712 and 722 through which the carbon brush 3 passes are provided at positions corresponding to the carbon brush 3. Passes through the through holes 712 and 722 and contacts the motor rotor 5.

  The front end of the inner cover 71 in the motor soundproof cover 7 passes through the first elastic sealing part 4, which seals the gap between the motor rotor 5. A concave tank 713 is formed on the rear end surface of the inner cover 71 of the motor soundproof cover 7, and the annular second sealing component 8 is located in the concave tank 713.

  The above elastic sealing parts are manufactured using rubber and plastic materials.

  A spring is installed outside the carbon brush 3, and the spring presses the carbon brush 3 onto the motor rotor 5, so that the carbon brush 3 and the motor rotor 5 come into close contact with each other.

  As described above, the present invention uses the motor soundproof cover 7 to block the friction position between the motor rotor 5 and the carbon brush 3, and noise generated by the contact position between the motor rotor 5 and the carbon brush 3 is generated by the motor soundproof cover 7. When the motor soundproof cover 7 passes through, the small holes 711 and 721 between the inner cover 71 and the outer cover 72 of the motor soundproof cover 7 cross each other to form interference with the sound wave, thereby greatly reducing the sound passing therethrough. can do. In this way, the soundproofing effect can be achieved and the consumer needs can be met. At the same time, since the present invention is only installed at the noise source position, the volume is relatively small, so that the product cost can be reduced. The present invention also has a fire prevention effect. Since the motor rotor 5 and the carbon brush 3 are rubbed easily at the frictional position, sealing the sparks makes it possible to wipe out the risk of the spark coming into contact with the outside world and igniting to cause a fire.

  Since the present invention has many advantages such as simple structure, low noise, high safety and enhanced practicality compared to current products, it has greater market competitiveness.

It is a three-dimensional view of the present invention. It is sectional drawing of this invention. It is a local three-dimensional exploded view of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motor rear support frame 2 Fixing part 3 Carbon brush 4 First elastic sealing part 5 Motor rotor 7 Motor soundproof cover 71 Inner cover 711 Small hole 712 Through hole 713 Concave tank 72 Outer cover 721 Small hole 722 Through hole 8 Second sealing part

Claims (4)

The motor includes a motor rear support frame, a motor rotor, and a carbon brush in elastic contact with the motor rotor;
The motor further includes the motor soundproof cover that covers the motor rotor and the outer surface of the carbon brush contact portion, and the motor soundproof cover includes an inner cover and an outer cover that are fitted to each other, and the inner cover and the outer cover. A shredder motor provided with a soundproofing device, characterized in that small holes intersecting each other are provided on the cover.   The inner cover and the outer cover of the motor soundproof cover have an annular shape, and a through hole is provided at a position corresponding to the carbon brush on the motor cover so that the carbon brush passes through the through hole. The motor of a shredder having a soundproofing device according to claim 1, wherein the motor is in contact with a motor rotor.   The front end of the motor soundproof cover passes through the first sealing part, which seals the gap between the motor rotor and the rear end of the motor soundproof cover passes through the second sealing part, which is in contact with the motor rotor. A motor for a shredder having a soundproofing device according to claim 2, wherein a gap between the two is sealed.   4. A shredder motor comprising a soundproofing device according to claim 1, wherein a gap is provided between the inner cover and the outer cover.

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