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Carbon brush for electric machine

A carbon brush and mechanical technology, which is applied in the field of carbon brushes for electric machinery, can solve the problems of not being able to ensure good sliding properties of carbon brushes and commutators, unevenness, and inability to ensure rectification, etc.

Inactive Publication Date: 2005-11-23
TOTANKAKO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In addition, in the method shown in Patent Document 2, although the temperature of the carbon brush increases and the wear of the carbon brush decreases, since the silicone oil is impregnated in the pores of the carbon brush in the form of an emulsion, it is difficult to impregnate the silicone oil evenly in the pores of the carbon brush, resulting in uneven
As a result, good sliding properties between carbon brushes and commutators cannot be ensured, and stable commutation may not be ensured

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] In the implementation, there will be figure 2 A water-soluble silicone oil having the chemical structure shown above was impregnated into pores of the resin-bonded carbon brush substrate produced as described above. Furthermore, the kinematic viscosity of the water-soluble silicone oil used at 20°C is 100mm 2 / s.

[0080] In the immersion step, the water-soluble silicone oil is dissolved in a predetermined amount of water to form an aqueous silicone oil solution, and the carbon brush base material is immersed in the aqueous solution for a predetermined period of time.

[0081] In order to produce various carbon brushes with different impregnation rates of silicone oil in the carbon brush base material, an aqueous silicone oil solution with a silicone oil concentration of 1 to 80% by weight was prepared, and the impregnation rate was adjusted using the difference in the silicone oil concentration. In addition, the time for immersing the carbon brush base material in the...

Embodiment 2

[0097] In this embodiment 2, at first to the carbon brush base material that embodiment 1 makes, dipping has image 3 Fluorine-modified silicone oil with the chemical structure shown. Here, the kinematic viscosity of fluorine-modified silicone oil is 100mm 2 / s.

[0098] Impregnation of fluorine-modified silicone oil, immersing the carbon brush base material in fluorine-modification silicone oil at room temperature of 25° C. for a certain period of time. Then take out the carbon brush and wipe it with a soft cloth to remove the fluorine-modified silicone oil stuck on the surface of the carbon brush.

[0099] Change the time of impregnating the carbon brush substrate in the fluorine-modified silicone oil to obtain a carbon brush with the same impregnation rate as in Example 1, that is, the impregnation rates are respectively 0.2% by weight, 1.2% by weight, 2.7% by weight, and 4.0% by weight. Carbon brushes with fluorine-modified silicone oil (4 types). In addition, the impr...

Embodiment 3

[0105] To the carbon brush substrate of the making of embodiment 1, impregnation has such as figure 2 Mixture of water-soluble silicone oil with the chemical structure shown and metal complex Cu(edta). Here, the kinematic viscosity of the water-soluble silicone oil and the metal complex is 100mm 2 / s.

[0106] For the impregnation of the water-soluble silicone oil and the metal compound, the carbon brush substrate was immersed in the mixture at a liquid temperature of 50° C. for 15 minutes. Then, after taking out the carbon brush base material from the mixture, the carbon brush was placed in a desiccator maintained at 100° C. to remove the water impregnated with the water-soluble silicone oil and the metal compound.

[0107] The impregnation ratios of the water-soluble silicone oil and the metal compound were shown in Table 3 to obtain respective carbon brushes. In addition, the impregnation rate was calculated|required by the method similar to the case of Example 1.

[0...

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Abstract

An electromechanical carbon brush 1 applied against a conductive rotating body 2 has a brush base material which is a material made of an aggregate including carbon as at least one (1) ingredient and of a binder, the electromechanical carbon brush 1 containing 0.2 to 10 % by weight of a water-soluble lubricant, 0.2 to 3 % by weight of fluorine denatured silicone oil or 0.2 to 10 % by weight of the water-soluble lubricant and a metallic compound, relative to the brush base material.

Description

technical field [0001] The present invention relates to a carbon brush for an electric machine, in particular to a carbon brush for an electric machine used in a small motor. Background technique [0002] Electric motors are developing toward miniaturization, larger capacity, and higher output. For example, motors used in electric vacuum cleaners are required to be smaller and more attractive. Therefore, it is necessary to reduce the outer diameter of the fan of the motor and make it rotate at an ultra-high speed (30,000 rpm or more). In such ultra-high-speed electric motors, it is important to maintain normal electrical contact by maintaining a good sliding state between carbon brushes for electric machinery (hereinafter referred to as carbon brushes) and commutators as conductive rotating bodies. [0003] Conventionally, in view of such problems, so-called resin-bonded carbon brushes in which graphite powder is bonded with synthetic resins have often been used. This kin...

Claims

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Application Information

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IPC IPC(8): H01R39/20H01R39/22H01R39/26
CPCH01R39/20H01R43/12
Inventor 佐古田隆仁前田孝香川佳一白川秀则
Owner TOTANKAKO
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