KR101686545B1 - DC motor with replaceable brushes alarm time - Google Patents

DC motor with replaceable brushes alarm time Download PDF

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Publication number
KR101686545B1
KR101686545B1 KR1020150085250A KR20150085250A KR101686545B1 KR 101686545 B1 KR101686545 B1 KR 101686545B1 KR 1020150085250 A KR1020150085250 A KR 1020150085250A KR 20150085250 A KR20150085250 A KR 20150085250A KR 101686545 B1 KR101686545 B1 KR 101686545B1
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KR
South Korea
Prior art keywords
brush
commutator
brush holder
identification bar
sensing
Prior art date
Application number
KR1020150085250A
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Korean (ko)
Inventor
이상현
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이상현
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Priority to KR1020150085250A priority Critical patent/KR101686545B1/en
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Publication of KR101686545B1 publication Critical patent/KR101686545B1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/06—Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

The present invention relates to a DC motor for alerting a brush replacement period, comprising: a commutator; a brush having one end contacting the outer circumferential surface of the commutator and applying power to the commutator; And a contact spring which is built in the brush holder and closely contacts the brush with the commutator, the direct current motor comprising:
The brush holder has a first end connected to the other end of the brush and an opposite end located at an end of the brush holder. The brush is formed on an end of the brush holder, And a transparent window formed in a transparent and identifiable manner,
When the brush touching the rotating commutator is worn down and the length is gradually reduced, the identification rod is transported with the brush. The user can visually identify the position of the other end of the identification rod through the sight window so that the brush replacement time can be easily determined In addition, it is possible to more precisely determine the replacement timing of the brush through the discrimination step formed inside the brush holder, so that malfunction, performance degradation, breakage, and safety accident There is an effect that it is possible to induce efficient use of the apparatus.
In addition, the user can clearly recognize the replacement timing of the brush through the sensing unit that detects the position of the sensing plate transferred together with the identification bar transferred due to the wear of the brush and transmits the sensing information to the outside, The brush replacement can be performed at an optimum time, and thus it is possible to prevent problems such as waste of the brush and deterioration of the performance of the apparatus which may occur due to erroneous determination of the replacement timing of the brush in the past.

Description

DC motor with replaceable brushes alarm time "

[0001] The present invention relates to a DC motor for warning a brush replacement time, and more particularly, when a brush contacting a rotating commutator is worn down and its length is gradually reduced, an identification bar is transported together with the brush, The position of the other end can be visually recognized, so that it is possible to easily determine the replacement timing of the brush, and it is possible to more precisely determine the replacement timing of the brush through the identification step formed inside the brush holder. And more particularly, to a DC motor for alerting a brush replacement period that can induce efficient use of the apparatus by solving problems of malfunction, performance degradation, breakage, and safety accident caused by failure to recognize (determine) the apparatus.

Generally, a brush used in a DC motor is a ceramic-based material composed mainly of graphite, and is manufactured to have rich lubricity, high conductivity, heat resistance, abrasion resistance and low friction characteristics, and is in contact with the surface of a commutator It is a very important part to perform the energizing role.

In mounting a brush, which acts as a power supply in a conventional DC motor, to the surface of a commutator of a rotating body, the brush is attached to the surface of the commutator without any wear detection means. In this state, The brush is gradually worn down to the limit of use, it does not recognize it. As a result, the operation of the motor is stopped or the operation performance is deteriorated, thereby causing a serious problem causing a risk of malfunction, breakage and safety accident of the DC motor .

Therefore, in order to prevent the operation of the motor from being stopped or the operation performance to be deteriorated, the user roughly changed the brush in consideration of the use time (date) of the motor. In such a case, It frequently occurs that the normal operation of the motor becomes impossible due to the waste caused by the replacement of the brush or the replacement time of the brush is changed too late.

[0001] Korean Patent Laid-Open Publication No. 10-2013-0108166 (Oct. 20, 2013) [0002] Korean Utility Model Publication No. 20-2013-0005851 (Oct. 10, 2013) [Patent Document 1] Korean Published Patent Application No. 10-2010-0051282 (May 17, 2010)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve all of the above problems, and it is an object of the present invention to provide an apparatus and a method for identifying a brush, which is contacted with a rotating commutator, Since the position of the other end of the bar can be visually identified, the replacement timing of the brush can be easily determined, and the replacement timing of the brush can be determined more accurately through the identification step formed inside the brush holder. And it is an object of the present invention to provide a DC motor which alerts the user of a brush replacement period that can induce efficient use of the apparatus by solving the problems of malfunction, performance degradation, breakage, and safety accident caused by failure to recognize (determine)

In addition, the user can clearly recognize the replacement timing of the brush through the sensing unit that detects the position of the sensing plate transferred together with the identification bar transferred due to the wear of the brush and transmits the sensing information to the outside, A DC motor that alerts the brush replacement period to prevent problems such as waste of the brush and deterioration of the performance of the apparatus that may occur due to erroneous determination of the replacement timing of the brush, .

According to an aspect of the present invention, there is provided a DC motor for alarming a brush replacement period, the brushless DC motor comprising: a commutator; a brush having one end contacting the outer circumferential surface of the commutator to apply power to the commutator; And a tightening spring incorporated in the brush holder to closely contact the brush with the commutator, the direct current motor comprising:

The brush holder has a first end connected to the other end of the brush and an opposite end located at an end of the brush holder. The brush is formed on an end of the brush holder, And a transparent window formed to be discernible and transparent,

The brush contacting the rotating commutator is worn out, the length of the brush gradually decreases, and when the other end of the brush advances in a direction in which the commutator is positioned by the tightening spring, the identification bar is advanced together with the brush The user can easily identify the replacement timing of the brush by identifying the position of the other end of the identification bar with the eyes through the sight window.

Further, an identification step is formed inside the brush holder,

When the brush is worn out and the other end of the identification bar exceeds the identification step, the brush is replaced so that the user can clearly recognize the replacement time of the brush through the identification step.

The detection plate is disposed on the identification bar and is transported together with the identification bar. The sensor plate is installed inside the brush holder, detects the position of the detection plate, transmits the detection information through a wire / wireless signal, And a sensing unit for alerting the replacement timing of the brush,

When the identification plate is transferred due to wear of the brush, the detection plate is transferred together with the identification bar. When the detection plate is transferred to the position where the detection unit is positioned, the detection unit senses the detection plate, And automatically notifies the user of the replacement timing of the brush.

The sensing unit may include a light emitting unit mounted on an inner surface of the brush holder and configured to irradiate light forward, and a light emitting unit mounted on the inner surface of the brush holder, facing the light emitting unit, And a light-receiving portion for receiving light,

Wherein when the detection plate receives light from the light emitting unit and receives light from the light receiving unit and the detection plate is transported together with the identification bar so that the light emitted from the light emitting unit is blocked by the detection plate, To be transmitted.

As described above, according to the DC motor for alarming the brush replacement period according to the present invention, when the brush contacting the rotating commutator is worn down and its length is gradually reduced, the identification bar is transported together with the brush. The position of the other end can be visually recognized, so that it is possible to easily determine the replacement timing of the brush, and it is possible to more precisely determine the replacement timing of the brush through the identification step formed inside the brush holder. It is possible to solve the problems of malfunction, performance degradation, breakage, and safety accident caused by failure to recognize (determine) the apparatus, thereby leading to efficient use of the apparatus.

In addition, the user can clearly recognize the replacement timing of the brush through the sensing unit that detects the position of the sensing plate transferred together with the identification bar transferred due to the wear of the brush and transmits the sensing information to the outside, The brush replacement can be performed at an optimum time, and thus it is possible to prevent problems such as waste of the brush and deterioration of the performance of the apparatus which may occur due to erroneous determination of the replacement timing of the brush in the past.

1 is a perspective view of a DC motor for warning a brush replacement timing according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view of the DC motor for warning the brush replacement timing shown in Fig. 1
FIG. 3 is a diagram showing the state of use of the DC motor for warning the brush replacement timing shown in FIG. 1

A DC motor for alarming a brush replacement timing according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. Detailed descriptions of well-known functions and constructions that may be unnecessarily obscured by the gist of the present invention will be omitted.

FIG. 1 is a perspective view of a DC motor for warning a brush replacement time according to an embodiment of the present invention, and FIG. 2 is a perspective view of a DC motor for warning a brush replacement time according to an embodiment of the present invention. Fig. 3 is an explanatory view showing the state of use of the DC motor for alarming the brush replacement timing shown in Fig. 1, respectively.

As shown in the drawing, the DC motor 100 for alarming the brush replacement period according to the embodiment of the present invention includes a commutator 1, one end of which is in contact with the outer circumferential surface of the commutator 1, (1), a brush holder (3) for accommodating the brush (2) therein, and a brush holder (3) embedded in the brush holder (3) (4) which is brought into close contact with the rotating shaft (1)

An identification bar 10, and a viewing window 20.

1 and 2, the identification bar 10 is formed long in the longitudinal direction of the brush 2 and is embedded in the brush holder 3, And the other end is positioned at the end of the brush holder 3. [

3, when the brush 2 is worn and the other end of the brush 2 is transferred to the tightening spring 4 in the direction in which the commutator 1 is positioned, And the identification bar 10 connected to the other end is transported together.

As shown in FIGS. 1 and 2, the viewing window 20 is formed on the end of the brush holder 3 so that the inside of the brush holder 3 is formed to be discernibly transparent.

3A, the position of the other end of the identification bar 10 located inside the brush holder 3 is identified through the viewing window 20, so that the brush 2 is worn out, It is possible to easily determine the replacement timing of the brush 2 by visually checking the position of the other end of the identification bar 10 which is carried along with the brush 2. [

Here, as shown in FIGS. 1 and 2, an identification step 30 is further formed in the brush holder 3,

3A, when the user confirms that the brush 2 is worn through the viewing window 20 and the other end of the identification bar 10 is beyond the identification step 30, So that the user can clearly recognize the replacement timing of the brush 2 through the discrimination step 30. [

1 and 2, a sensing plate 41 is disposed on the identification bar 10 and is transported together with the identification bar 10, and a sensing plate 41 installed inside the brush holder 3, And a sensing unit (42) for sensing the position of the sensing plate (41) and transmitting the sensed information through a wire / wireless signal to alert the user of the replacement timing of the brush (2)

3B, when the identification bar 10 is transferred due to wear of the brush 2, the detection plate 41 is transferred together with the identification bar 10, The sensing unit 41 senses the sensing plate 41 and transmits the sensed information to the outside so that the user can be informed of the replacement timing of the brush 2 It is possible to induce the replacement of the brush 2 more conveniently and more reliably by automatically alarming.

Here, the sensing information (signal) sensed by the sensing unit 42 and transmitted to the sensing plate 41 is transmitted to an external device (not shown) capable of alerting the user of the replacement timing of the brush 2, The user can clearly recognize the replacement timing of the brush 2 through the alarm of the external device. The external device may be an alarm speaker or an alarm speaker that generates an alarm sound in consideration of the user's working environment or conditions It should be understood that the invention may be embodied in other forms.

1 and 2, the sensing unit 42 is mounted on the inner surface of the brush holder 3 and includes a light emitting unit 42a for emitting light forward, And a light receiving portion 42b which is installed on the inner surface of the light emitting portion 42a and is arranged to face the light emitting portion 42a and receives light emitted from the light emitting portion 42a,

3b, when the light is emitted from the light emitting unit 42a, the light receiving unit 42b receives the light, and the sensing plate 41 is conveyed together with the identification bar 10, When the sensing plate 41 blocks light irradiated from the light receiving portion 42a, the sensing information of the sensing plate 41 is transmitted from the light receiving portion 42b to an external device.

3B, when the detection plate 41 is moved to the position where the detection unit 42 is positioned together with the identification bar 10, the detection information of the detection plate 41 is detected (42) to an external device to alert the user of the replacement time of the brush (2) through the external device, thereby promptly replacing the brush (2).

Therefore, it is needless to say that the installation position of the sensing unit 42 is appropriately set in consideration of the overall length of the brush 2, the use limit length, and the like.

Although the sensing unit 42 is embodied as the light emitting unit 42a and the light receiving unit 42b, the sensing unit 41 may be a mechanical device such as a conventional limit switch (not shown) It is to be understood that the invention may be embodied.

The DC motor 100 for alarming the replacement time of the brush according to the present invention is constituted as described above. When the brush 2 contacting the rotating commutator 1 is worn and its length is gradually reduced, The user can visually identify the position of the other end of the identification bar 10 through the viewing window 20 to easily determine the replacement timing of the brush 2. [ The replacement time of the brush 2 can be determined more accurately through the discrimination step 30 formed inside the brush holder 3 and thus the brush replacement time can not be recognized It is possible to solve the problems of the malfunction, the performance degradation, the breakage, and the safety accident of the apparatus which are generated, and to induce the efficient use of the apparatus.

The sensing unit 42 senses the position of the sensing plate 41 to be transported together with the identification bar 10 transported due to wear of the brush 2 and transmits the sensed information to the outside. Since the user can clearly recognize the replacement timing of the brush 2, it is possible to perform the replacement of the brush 2 at an optimum timing, 2) and the performance degradation of the apparatus can be prevented in advance.

The DC motor 100 that alerts the brush replacement time according to the embodiment of the present invention having the above-described configuration determines the replacement timing of the brush 2 using the following method.

First, as shown in FIG. 3A, when the brush 2 contacting the continuously rotating commutator 1 gradually wears due to long-term use of the DC motor 100 warning the brush replacement timing of the present invention, 2) The identification bar 10 connected to the other end is gradually moved in the direction in which the commutator 1 is positioned. Since the positional change of the identification bar 10 can be identified through the sight window 20, It is possible to easily determine the replacement timing of the brush 2 through the position of the identification bar 10.

Further, if the identification of the other end of the identification bar 10 exceeding the identification step 30 is confirmed through the viewing window 20, the replacement of the brush 2 is performed, Can be determined.

As shown in FIG. 3B, even if the position of the identification bar 10 is visually recognized and the replacement time of the brush 2 is not determined, the wear of the brush 2 causes the identification bar 10, The detection plate 41 is conveyed together with the identification bar 10. When the detection plate 41 is conveyed to a position where the detection unit 42 is positioned, Detects the detection plate 41 and transmits the detection information to an external device capable of alerting the user to automatically alert the replacement timing of the brush 2 to induce a more convenient and stable replacement of the brush 2 .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. You will understand the point. It goes without saying that variations can be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the scope of claim of the present invention is not limited within the scope of the detailed description, but will be defined by the following claims and technical ideas thereof.

1. Commutator 2. Brush
3. Brush holder 4. Clamping spring
10. Identification bar 20. Viewing window
30. Identification step 41. Detection plate
42. Detection section 42a. The light-
42b. The light-
100. DC motor alarming brush replacement time

Claims (4)

A commutator (1), a brush (2) whose one end is in contact with an outer circumferential surface of the commutator (1) to apply power to the commutator (1), and a brush holder And a tightening spring (4) built in the brush holder (3) for closely contacting the brush (2) with the commutator (1)
An identification bar 10 embedded in the brush holder 3, one end connected to the other end of the brush 2, and the other end positioned at the end of the brush holder 3; And
And a transparent window 20 formed on an end of the brush holder 3 and having a transparent and identifiable inside of the brush holder 3,
The brush 2 contacting the rotating commutator 1 is worn and the length of the brush 2 is gradually reduced so that the other end of the brush 2 is pressed by the tightening spring 4 so that the commutator 1 The identification bar 10 is advanced together with the brush 2 so that the user can visually identify the position of the other end of the identification bar 10 through the viewing window 20, To easily determine the replacement timing of the cartridge 2,
A detection plate 41 disposed on the identification bar 10 and conveyed together with the identification bar 10 and a sensor plate 41 installed in the brush holder 3 to sense the position of the detection plate 41, And a sensing unit (42) for transmitting sensed information through a wire / wireless signal and alerting the user of the replacement timing of the brush (2)
When the identification bar 10 is conveyed due to wear of the brush 2, the detection plate 41 is transferred together with the identification bar 10 to the position where the detection unit 42 is located, The sensing unit 42 senses the sensing plate 41 and transmits the sensing information to the outside to automatically alert the user of the replacement timing of the brush 2,
The sensing unit 42 is fixed to the inner surface of the brush holder 3 and is fixed to the inner surface of the brush holder 3 and includes a light emitting unit 42a for emitting light forward, And a light receiving section (42b) provided opposite to the light emitting section (42a) to receive light emitted from the light emitting section (42a)
When the light is emitted from the light emitting portion 42a, the light is received by the light receiving portion 42b, and the detection plate 41 is conveyed together with the identification bar 10 to transmit light emitted from the light emitting portion 42a. And when the sensing plate (41) is blocked, sensing information of the sensing plate (41) is transmitted to the outside from the light receiving unit (42b). delete delete delete
KR1020150085250A 2015-06-16 2015-06-16 DC motor with replaceable brushes alarm time KR101686545B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109412315A (en) * 2018-11-14 2019-03-01 大庆市华禹石油机械制造有限公司 A kind of oilfield exploitation mechanical equipment motor
KR20220096332A (en) * 2020-12-31 2022-07-07 주식회사 성은기계 Carbon brush consumption measurement apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030047865A (en) * 2001-12-11 2003-06-18 미쓰비시덴키 가부시키가이샤 Automotive alternator and automotive alternator brush abrasion detection system
KR20100051282A (en) 2008-11-07 2010-05-17 진기호 Warning apparatus for exchange of vehicle generator
KR20130108166A (en) 2012-03-23 2013-10-02 제너럴 일렉트릭 캄파니 Electrical brush holder apparatus and related monitoring system
KR20130005851U (en) 2012-03-26 2013-10-10 (주)에스아이엠 brush assembly

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030047865A (en) * 2001-12-11 2003-06-18 미쓰비시덴키 가부시키가이샤 Automotive alternator and automotive alternator brush abrasion detection system
KR20100051282A (en) 2008-11-07 2010-05-17 진기호 Warning apparatus for exchange of vehicle generator
KR20130108166A (en) 2012-03-23 2013-10-02 제너럴 일렉트릭 캄파니 Electrical brush holder apparatus and related monitoring system
KR20130005851U (en) 2012-03-26 2013-10-10 (주)에스아이엠 brush assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109412315A (en) * 2018-11-14 2019-03-01 大庆市华禹石油机械制造有限公司 A kind of oilfield exploitation mechanical equipment motor
KR20220096332A (en) * 2020-12-31 2022-07-07 주식회사 성은기계 Carbon brush consumption measurement apparatus
KR102460267B1 (en) 2020-12-31 2022-10-28 주식회사 성은기계 Carbon brush consumption measurement apparatus

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