Carbon brush electric spark observation tool

Abstract

The utility model relates to the field of motor detection equipment, in particular to a carbon brush electric spark observation tool. A carbon brush electric spark observation tool comprises a base, a rotary driving component and a carbon brush support, wherein the rotary driving component and the carbon brush support are fixedly connected to the base. The output end of the rotation driving part is connected with a rotating shaft, and a commutator is installed on the rotating shaft. The carbon brush support is movably provided with a carbon brush in the radial direction of the commutator, and the carbon brush elastically abuts against the commutator. And the shooting end of the high-speed camera faces the contact position of the carbon brush and the commutator. According to the tool, the high-speed camera is adopted to shoot electric sparks, and videos or video frames shot by the high-speed camera are looked up manually or through a computer, so that whether the electric sparks generated by the currently detected carbon brush belong to a normal range or not can be judged.

Description

Technical Field

[0001] The utility model relates to the field of motor detection equipment, in particular to a carbon brush electric spark observation tool. Background Art

[0002] Carbon brushes, also called brushes, are widely used as sliding contacts in many electrical equipment. Motor carbon brushes are widely used in various AC and DC generators, synchronous motors, battery DC motors, crane motor collector rings, various types of welding machines, etc. Carbon brushes are used on the commutator or slip ring of the motor as a sliding contact body for conducting and importing current. It has good electrical conductivity, thermal conductivity and lubrication properties, and has a certain mechanical strength and commutation spark instinct.

[0003] According to the theory of electrical machinery, the current in the armature winding elements of a DC motor is actually alternating when the motor is rotating. Figure 1 As shown in the figure, when a coil element is turned from position ① to position ②, the coil crosses the g axis of the motor, and the current in it changes from +i to -i. This process is called the commutation process of the element.

[0004] Since the coil element of the armature winding is an inductor element with an inductance L, the current -i when the coil element is in position ① has energy stored in the inductance L, and its value is: W = 1 / 2Li 2 ;

[0005] When the current in the component changes from +i to zero, its stored energy "must be released, and the released energy is converted into sparks under the brushes. No matter what kind of brushed DC motor, as long as commutation exists, "must exist, therefore, sparks under the brushes must exist, as long as the sparks are not larger than the normal range (2.5 sparks or less), they are normal sparks. However, too large sparks will affect the life of the commutator and the life of the brushes. Generally, sparks below level 2.5 have little effect on the life. When the current in the component increases from 0 to -i, the energy absorbed by the component from the power supply, as long as the current of the brush and the commutator is mainly contact conduction current, will not generate sparks. If the commutation deteriorates seriously, so that ion conduction occurs mainly between the brush and the commutator, the spark is too large, and fire is generated in severe cases, then the motor spark is abnormal and needs to be eliminated. From the above analysis, it can be seen that the existence of sparks between the brush and the commutator of a severe DC motor is normal as long as the sparks are not large. Of course, we hope that the sparks are as small as possible, but no sparks are impossible. From a product perspective, good design, structure, and craftsmanship are all prerequisites for ensuring normal sparks.

[0006] On this basis, it is necessary to observe the sparks generated by the carbon brushes. Summary of the invention

[0007] In order to solve the above problems, the purpose of the utility model is to provide a carbon brush spark observation tool, which uses a high-speed camera to shoot sparks, and checks the video or video frames shot by the high-speed camera manually or by computer, so as to determine whether the sparks generated by the currently detected carbon brush are within the normal range.

[0008] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0009] A carbon brush electric spark observation tool, characterized in that: it includes a base, and a rotating drive component and a carbon brush holder fixed to the base; a rotating shaft is connected to the output end of the rotating drive component, and a commutator is installed on the rotating shaft; the carbon brush holder is movably provided with a carbon brush in the radial direction of the commutator, and the carbon brush is elastically pressed against the commutator; it also includes a high-speed camera, and the shooting end of the high-speed camera is facing the contact position between the carbon brush and the commutator.

[0010] The utility model adopts the above technical solution, which relates to a carbon brush spark observation tool. The rotating drive component in the solution can drive the rotating shaft and the commutator thereon to rotate, and the carbon brush on the carbon brush bracket is elastically pressed against the commutator. During operation, the commutator rotates at high speed and generates sparks between the carbon brush, which are photographed by a high-speed camera. Finally, the video or video frame shot by the high-speed camera is checked manually or by computer to determine whether the spark generated by the currently detected carbon brush is within the normal range.

[0011] In a specific implementation, the carbon brush holder is provided with a plurality of carbon brush holders on the radial outer side of the commutator, and a compression spring is provided on the carbon brush holder; a carbon brush is movably provided in the carbon brush holder, and the compression spring acts on the carbon brush to elastically press the carbon brush against the commutator. In this solution, a carbon brush is slidably installed in the carbon brush holder provided on the carbon brush holder, and the carbon brush is elastically pressed against the commutator under the action of the compression spring.

[0012] In a specific solution, the rear end of the carbon brush holder is an open end, and the carbon brush can be removed or installed from the rear end of the carbon brush holder. Based on this, the tooling can perform carbon spark detection on any carbon brush structure, and only the carbon brush to be detected needs to be installed from the rear end of the carbon brush holder, and after the installation is completed, the tooling can be started for detection.

[0013] Preferably, the carbon brush holder is provided with two radially corresponding carbon brush holders, and the shooting end of the high-speed camera faces between the two carbon brush holders. The two radial carbon brush holders are provided for detection and observation, which can more accurately simulate the spark generation when the motor is running, and can also avoid the blocking and interference of the high-speed camera shooting path, which affects the shooting effect.

[0014] In a specific implementation, the rotary drive component is a drive motor, and the output shaft of the drive motor serves as the rotating shaft, or the rotating shaft is connected to the output shaft of the drive motor through a coupling. In this solution, the drive motor is used as the rotary drive component, which can drive the rotating shaft to rotate, thereby driving the commutator to move relative to the carbon brush.

[0015] Preferably, a bearing bracket is further provided on the base at the rear side of the carbon brush bracket, a through hole is provided in the carbon brush bracket, and the rotating shaft passes through the carbon brush bracket and is mounted on the bearing bracket via a bearing. The rotating shaft in the scheme here passes through the carbon brush bracket and is then rotatably supported on the bearing bracket, and the centered rotation of the rotating shaft can be ensured by the bearing positioning support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the carbon brush electric spark observation tooling.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the other side of the carbon brush electric spark observation tooling.

[0018] Figure 3 It is a structural schematic diagram of the carbon brush holder. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0020] The embodiments described are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0025] like Figures 1 to 3 As shown, this embodiment relates to a carbon brush electric spark observation tool, including a base 1, and a rotating drive component 2 and a carbon brush holder 3 fixed to the base 1; the output end of the rotating drive component 2 is connected to a rotating shaft 4, and a commutator 5 is installed on the rotating shaft 4; the carbon brush holder 3 is movably provided with a carbon brush 6 in the radial direction of the commutator 5, and the carbon brush 6 is elastically pressed against the commutator 5; and a high-speed camera 7 is also included, and the shooting end of the high-speed camera 7 is facing the contact position between the carbon brush 6 and the commutator 5. The rotating drive component 2 in this scheme can drive the rotating shaft 4 and the commutator 5 thereon to rotate, and the carbon brush 6 on the carbon brush holder 3 is elastically pressed against the commutator 5. During operation, the commutator 5 rotates at a high speed and generates electric sparks between the carbon brush 6, which are photographed by the high-speed camera 7. Finally, the shooting video or video frame of the high-speed camera 7 is checked manually or by computer to determine whether the spark generated by the currently detected carbon brush 6 is within the normal range.

[0026] In a specific implementation scheme, the rotating drive component 2 is a driving motor, and the output shaft of the driving motor serves as the rotating shaft 4 or the rotating shaft 4 is connected to the output shaft of the driving motor through a coupling. In this scheme, a driving motor is used as the rotating drive component 2, which can drive the rotating shaft 4 to rotate, thereby driving the commutator 5 to move relative to the carbon brush 6. A bearing bracket 8 is also provided on the base 1 at the rear side of the carbon brush bracket 3, and a through hole 31 is provided in the carbon brush bracket 3. The rotating shaft 4 passes through the carbon brush bracket 3 and is mounted on the bearing bracket 8 through a bearing. The rotating shaft 4 in the scheme here passes through the carbon brush bracket 3 and is then rotatably supported on the bearing bracket 8. The bearing positioning support can ensure that the rotating shaft 4 rotates centered.

[0027] In such Figure 3 In the specific implementation scheme shown, the carbon brush holder 3 is provided with a plurality of carbon brush holders 32 on the radial outer side of the commutator 5, and a compression spring 33 is provided on the carbon brush holder 32; a carbon brush 6 is movably provided in the carbon brush holder 32, and the compression spring 33 acts on the carbon brush 6 to elastically press the carbon brush 6 against the commutator 5. In this scheme, the carbon brush 6 is slidably installed in the carbon brush holder 32 provided on the carbon brush holder 3, and the carbon brush 6 is elastically pressed against the commutator 5 under the action of the compression spring 33. Preferably, two radially corresponding carbon brush holders 32 are provided on the carbon brush holder 3, and the shooting end of the high-speed camera 7 faces between the two carbon brush holders 32. The two radial carbon brush holders 32 are provided for detection and observation, which can more accurately simulate the spark generation during the operation of the motor, and can also avoid the blocking and interference of the shooting path of the high-speed camera 7, which affects the shooting effect.

[0028] In a specific solution, the rear end of the carbon brush holder 32 is an open end, and the carbon brush 6 can be removed or installed from the rear end of the carbon brush holder 32. Based on this, the tooling can perform carbon spark detection for any carbon brush 6 structure, and only the carbon brush 6 to be detected needs to be installed from the rear end of the carbon brush holder 32, and after the installation is completed, the tooling can be started for detection.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A carbon brush spark observation tool, characterized in that: The invention comprises a base (1), and a rotating drive component (2) and a carbon brush holder (3) fixedly connected to the base (1); a rotating shaft (4) is connected to the output end of the rotating drive component (2), and a commutator (5) is installed on the rotating shaft (4); the carbon brush holder (3) is movably provided with a carbon brush (6) in the radial direction of the commutator (5), and the carbon brush (6) is elastically pressed against the commutator (5); and a high-speed camera (7) is also included, and the shooting end of the high-speed camera (7) is directed toward the contact position between the carbon brush (6) and the commutator (5).

2. A carbon brush spark observation tool according to claim 1, characterized in that: The carbon brush holder (3) is provided with a plurality of carbon brush holders (32) on the radial outer side of the commutator (5), and a compression spring (33) is provided on the carbon brush holder (32); a carbon brush (6) is movably provided in the carbon brush holder (32), and the compression spring (33) acts on the carbon brush (6) to elastically press the carbon brush (6) against the commutator (5).

3. A carbon brush spark observation tool according to claim 2, characterized in that: The rear end of the carbon brush holder (32) is an open end, and the carbon brush (6) can be removed from or installed in the rear end of the carbon brush holder (32).

4. A carbon brush electric spark observation tool according to claim 2, characterized in that: The carbon brush bracket (3) is provided with two carbon brush holders (32) corresponding to each other in radial direction, and the shooting end of the high-speed camera (7) faces between the two carbon brush holders (32).

5. The carbon brush electric spark observation tool according to claim 1, characterized in that: The rotating drive component (2) is a driving motor, and the output shaft of the driving motor serves as the rotating shaft (4), or the rotating shaft (4) is connected to the output shaft of the driving motor via a coupling.

6. A carbon brush spark observation tool according to claim 5, characterized in that: A bearing bracket (8) is also arranged on the base (1) at the rear side of the carbon brush bracket (3); a through hole (31) is arranged in the carbon brush bracket (3); and the rotating shaft (4) passes through the carbon brush bracket (3) and is arranged on the bearing bracket (8) via a bearing.

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