CN218829379U - Noise-reduction starting motor - Google Patents
Noise-reduction starting motor Download PDFInfo
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- CN218829379U CN218829379U CN202221820531.1U CN202221820531U CN218829379U CN 218829379 U CN218829379 U CN 218829379U CN 202221820531 U CN202221820531 U CN 202221820531U CN 218829379 U CN218829379 U CN 218829379U
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Abstract
The utility model relates to the technical field of electric machines, specifically be a starter motor of making an uproar falls. The brush box is provided with brush springs and brushes, one end of each brush is connected with the outer surface of the commutator in a sliding manner, and the other end of each brush is connected with the brush frame through the brush springs; the commutator comprises a cylinder and commutator segments arranged along the circumferential direction of the cylinder, and mica sheets are arranged between every two adjacent commutator segments; when the brush spring is compressed to 11mm, the elasticity is 4.1N +/-0.4N, and when the brush spring is compressed to 8mm, the elasticity is 6.5N +/-0.7N. The utility model discloses, through the elasticity that changes the brush spring, when the brush spring compressed to 11mm promptly, elasticity was 4.1N 0.4N, and when the brush spring compressed to 8mm, elasticity was 6.5N 0.7N. After improvement, the average value of 25 th order sound pressure level of the speed reduction section of the starting motor is 6dB (A) less than that of the original state, and the average value of 50 th order sound pressure level is 3dB (A) less than that of the original state.
Description
Technical Field
The utility model relates to the technical field of electric machines, specifically be a starter motor of making an uproar falls.
Background
As shown in fig. 1, the noise-reduction starting motor comprises an electric brush frame, electric brush boxes, electric brushes, brush springs and a commutator, wherein the electric brush frame and the commutator are coaxially arranged; the commutator comprises a cylinder and commutator segments arranged at intervals along the circumferential direction of the cylinder, wherein mica sheets are arranged between every two adjacent commutator segments.
The QD12159 type starting motor of the starting motor produced by the company plays a role of dragging the engine to a specified rotating speed when a passenger car is ignited and started so as to start the engine, after the engine is started, the starting motor stops working, and the rotating speed of the starting motor is reduced to zero, so that sharp squeal is easily generated, drivers and passengers feel uncomfortable, and the actual measurement shows that 25-order and 50-order noises are the largest.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a reduce starter motor deceleration in-process 25 rank and 50 rank noise start motor that make an uproar fall is provided.
The technical scheme that the utility model adopts for solving the technical problems is that the noise reduction starting motor comprises an electric brush frame, an electric brush box 201, an electric brush, a brush spring and a commutator, wherein the electric brush frame and the commutator are coaxially arranged, a plurality of electric brush boxes are arranged between the electric brush frame and the commutator, the brush spring and the electric brush are arranged on the electric brush box, one end of the electric brush is connected with the outer surface of the commutator in a sliding way, and the other end of the electric brush is connected with the electric brush frame through the brush spring;
the commutator comprises a cylinder and commutator segments arranged at intervals along the circumferential direction of the cylinder, and mica sheets are arranged between every two adjacent commutator segments;
when the brush spring is compressed to 11mm, the elasticity is 4.1N +/-0.4N, and when the brush spring is compressed to 8mm, the elasticity is 6.5N +/-0.7N.
Further, the distance between two adjacent commutator segments is d1=0.65 ± 0.08mm.
Furthermore, the roughness of the outer surface of the commutator 1 is 0.4-0.8 μm.
The utility model has the advantages that: by changing the elasticity of the brush spring, namely when the brush spring is compressed to 11mm, the elasticity is 4.1N +/-0.4N, and when the brush spring is compressed to 8mm, the elasticity is 6.5N +/-0.7N. After improvement, the average value of 25 th order sound pressure level of the speed reduction section of the starting motor is 6dB (A) less than that of the original state, and the average value of 50 th order sound pressure level is 3dB (A) less than that of the original state.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a front view of the commutator 1 of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is a graph comparing the noise of 25 th order of examples 1 and 2 with comparative examples 1 and 2;
FIG. 5 is a 25-step noise contrast plot for examples 3, 4 versus comparative examples 1, 2;
FIG. 6 is a 25 th order noise contrast plot for examples 5, 6 versus comparative examples 1, 2;
FIG. 7 is a 25 th order noise contrast plot for examples 7, 8 versus comparative examples 1, 2;
FIG. 8 is a graph of the comparison of the noise of 50 th order for examples 1, 2 and comparative examples 1, 2;
FIG. 9 is a graph of the comparison of the noise level of 50 for examples 3, 4 and comparative examples 1, 2;
FIG. 10 is a graph of the comparison of the noise at 50 th order for examples 5, 6 and comparative examples 1, 2;
FIG. 11 is a graph of the comparison of the noise of 50 th order for examples 7, 8 and comparative examples 1, 2;
reference numerals: 1-a commutator; 201-brush box; 3-an electric brush; 4-brush spring; 7-electric brush holder; 101-a commutator segment; 102-a barrel; 104-mica sheet.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
As shown in fig. 1, 2 and 3, the noise reduction starting motor comprises a brush holder 7, brush boxes 201, brushes 3, brush springs 4 and a commutator 1, wherein the brush holder 7 and the commutator 1 are coaxially arranged, a plurality of brush boxes 201 are arranged between the brush holder 7 and the commutator 1, the brush springs 4 and the brushes 3 are installed on the brush boxes 201, one end of each brush 3 is slidably connected with the outer surface of the commutator 1, and the other end of each brush 3 is connected with the brush holder 7 through the brush spring 4; the commutator 1 comprises a cylinder 102 and commutator segments 101 arranged at intervals along the circumferential direction of the cylinder 102, and an insulating assembly is arranged between every two adjacent commutator segments 101;
when the brush spring 4 is compressed to 11mm, the elastic force is 4.1N +/-0.4N, and when the brush spring 4 is compressed to 8mm, the elastic force is 6.5N +/-0.7N.
The brush holder 7 is used for mounting the brush box 201, the brush holder 7 is cylindrical, the brush holder 7 and the commutator 1 are coaxially arranged, the commutator 1 is connected with a rotor of the starting motor, the commutator 1 is used for changing direct current electromotive force of the starting motor into alternating current electromotive force, the rotor of the starting motor rotates, and finally the effect of starting an engine is achieved. The commutator 1 is a commonly used groove type commutator 1, the diameter d =25.4 +/-0.125 mm of the commutator 1, and the central line of the commutator 1 is superposed with the central line of the brush holder 7;
a plurality of brush boxes 201 are arranged between the brush holder 7 and the commutator 1, the brush boxes 201 are mainly used for mounting the brush springs 4 and the brushes 3, and cavities for placing the brush springs 4 and the brushes 3 are arranged in the brush boxes 201. One end of the electric brush 3 is connected with the outer surface of the commutator 1 in a sliding way, the other end of the electric brush 3 is connected with an electric brush frame 7 through a brush spring 4, the electric brush 3 is used for the commutator 1 and is used as a sliding contact body for leading in current, and the electric brush 3 mainly adopts a graphite electric brush, an electrochemical graphite electric brush, a resin bonding graphite electric brush and a metal graphite electric brush, wherein the graphite electric brush is the most common and the cheapest. The function of the brush spring 4 is to provide a continuous force to keep the brush 3 in contact with the commutator 1 at all times.
The commutator 1 mainly comprises a cylinder 102, the cylinder 102 is cylindrical, the cylinder 102 is made of insulating materials, commutator segments 101 are uniformly arranged on the outer surface of the cylinder 102 in the circumferential direction, the commutator segments 101 can conduct electricity, and the commutator segments 101 are made of conducting metals such as copper, silver, gold and the like. It should be noted here that there is a certain gap between two adjacent commutator segments 101, and this gap is used for installing the mica sheet 104. A mica sheet 104 is arranged between two adjacent commutator segments 101, and the mica sheet 104 plays an insulating role to prevent the two adjacent commutator segments 101 from contacting.
In order to reduce the noise of the starting motor in the speed reduction stage, when the brush spring 4 is compressed to 11mm, the elastic force of the brush spring 4 is 4.1N +/-0.4N, and when the brush spring 4 is compressed to 8mm, the elastic force of the brush spring 4 is 6.5N +/-0.7N.
Further, as a preferred embodiment, the distance between two adjacent segments 101 is d1=0.65 ± 0.08mm.
Further, as a preferable embodiment, the outer surface roughness of the commutator 1 is 0.4 to 0.8 μm.
The following table shows the specific values of the surface roughness of the commutator 1, the distance between two adjacent segments 101 and the elastic force of the brush spring 4 in different embodiments.
The table below shows specific values for the noise mean values of 25 th order and 50 th order for the comparative and example.
Comparative example 1 is compared with example 1, and example 1 changes the elastic force of the brush spring 4 in comparative example 1; comparative example 2 is compared with example 2, and example 2 changes the elastic force of the brush spring 4 in comparative example 2. Referring to fig. 4 and 8, after changing the elastic force of the brush spring 4, the 25 th order sound pressure level and the 50 th order sound pressure level of the motor were both lowered, wherein the 25 th order sound pressure level average value of example 1 was lowered by 8.15db and the 50 th order sound pressure level average value was lowered by 3.91dB, respectively, with respect to the comparative example 1; example 2 showed a 6.72db drop in the mean value of the sound pressure level of 25 th order and a 3.52dB drop in the mean value of the sound pressure level of 50 th order relative to comparative example 2.
Example 3 is compared with comparative example 1, and example 3 changes the elastic force of the brush spring 4 and the distance between two adjacent commutator segments 101 in comparative example 1; example 4 is compared with comparative example 2, and example 4 changes the elastic force of the brush spring 4 and the distance between two adjacent segments 101 in comparative example 2. Referring to fig. 5 and 9, after the elastic force of the brush spring 4 and the distance between two adjacent commutator segments 101 are changed, the 25 th order sound pressure level and the 50 th order sound pressure level of the motor are both reduced, wherein the average value of the 25 th order sound pressure level of the embodiment 3 is reduced by 12.88db and the average value of the 50 th order sound pressure level is reduced by 8.39dB relative to the average value of the 25 th order sound pressure level of the comparative example 1; example 4 was a 11.47db drop in the mean value of the pressure level at 25 th order and a 3.72dB drop in the mean value of the pressure level at 50 th order relative to comparative example 2.
Example 5 is compared with comparative example 1, and example 5 changes the elastic force of the brush spring 4 and the surface roughness of the commutator 1 in comparative example 1; example 6 is compared with comparative example 2, and example 6 changes the elastic force of the brush spring 4 and the surface roughness of the commutator 1 in comparative example 2. Referring to fig. 6 and 10, after changing the elasticity of the brush spring 4 and the surface roughness of the commutator 1, the sound pressure level of 25 th order and the sound pressure level of 50 th order of the motor were both decreased, wherein the average value of the sound pressure level of 25 th order of example 5 was decreased by 8.26db and the average value of the sound pressure level of 50 th order was decreased by 6.58dB, respectively, with respect to comparative example 1; example 6 showed a 9.08db drop in mean value of sound pressure level at 25 th order and a 3.01dB drop in mean value of sound pressure level at 50 th order relative to comparative example 2.
Example 7 is compared with comparative example 1, and example 7 changes the elastic force of the brush spring 4, the surface roughness of the commutator 1 and the distance between two adjacent commutator segments 101 in the comparative example 1; example 8 is compared with comparative example 2, and example 4 changes the elastic force of the brush spring 4, the surface roughness of the commutator 1 and the distance between two adjacent commutator segments 101 in the comparative example 2. Referring to fig. 7 and 11, after the elastic force of the brush spring 4, the surface roughness of the commutator 1 and the distance between two adjacent commutator segments 101 are changed, the 25 th order sound pressure level and the 50 th order sound pressure level of the motor are reduced, wherein the average value of the 25 th order sound pressure level of the embodiment 7 is reduced by 13.08db and the average value of the 50 th order sound pressure level is reduced by 9.37dB relative to the average value of the 25 th order sound pressure level of the comparative example 1; example 8 was a 13.68db drop in the mean value of the sound pressure level of 25 th order and a 11.02dB drop in the mean value of the sound pressure level of 50 th order relative to comparative example 2.
The following table shows the performance test result of the improved starting motor, the change of the elasticity of the brush spring 4, the surface roughness of the commutator 1 and the distance between two adjacent commutator segments 101 has no influence on the performance of the starting motor, and the improved starting motor meets the input requirements of customers before and after improvement.
The following table shows specific values of the deceleration duration of the starting motor of the comparative example and the embodiment, and it can be seen that the deceleration duration can be shortened by changing and reducing the elastic force of the spring 4, the surface roughness of the commutator 1 and the distance between two adjacent commutator segments 101.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (3)
1. The noise-reduction starting motor comprises an electric brush frame (7), electric brush boxes (201), electric brushes (3), brush springs (4) and a commutator (1), wherein the electric brush frame (7) and the commutator (1) are coaxially arranged, a plurality of electric brush boxes (201) are arranged between the electric brush frame (7) and the commutator (1), the electric brush boxes (201) are provided with the brush springs (4) and the electric brushes (3), one ends of the electric brushes (3) are connected with the outer surface of the commutator (1) in a sliding mode, and the other ends of the electric brushes (3) are connected with the electric brush frame (7) through the brush springs (4);
the commutator (1) comprises a cylinder body (102) and commutator segments (101) which are arranged at intervals along the circumferential direction of the cylinder body (102), wherein mica sheets (104) are arranged between every two adjacent commutator segments (101);
the method is characterized in that: when the brush spring (4) is compressed to 11mm, the elastic force is 4.1N +/-0.4N, and when the brush spring (4) is compressed to 8mm, the elastic force is 6.5N +/-0.7N.
2. The noise-reduced starter motor according to claim 1, wherein: the distance between two adjacent commutator segments (101) is d1=0.65 +/-0.08 mm.
3. The noise-reduced starter motor according to claim 1 or 2, wherein: the roughness of the outer surface of the commutator (1) is 0.4-0.8 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221820531.1U CN218829379U (en) | 2022-07-15 | 2022-07-15 | Noise-reduction starting motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221820531.1U CN218829379U (en) | 2022-07-15 | 2022-07-15 | Noise-reduction starting motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218829379U true CN218829379U (en) | 2023-04-07 |
Family
ID=87275871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221820531.1U Active CN218829379U (en) | 2022-07-15 | 2022-07-15 | Noise-reduction starting motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218829379U (en) |
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2022
- 2022-07-15 CN CN202221820531.1U patent/CN218829379U/en active Active
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