Electric brush fatigue test device and method

Abstract

The invention belongs to the technical field of testing devices, and relates to an electric brush fatigue testing device and method.The device comprises a rack, a motion conversion assembly, a sliding installation assembly, a driving assembly and a baffle assembly, the driving assembly and the baffle assembly are connected with the rack, and the driving assembly is used for providing rotation power for the motion conversion assembly; one end of the motion conversion assembly is connected with the driving assembly, the other end of the motion conversion assembly is connected with the sliding mounting assembly, and the motion conversion assembly is used for converting rotary power into linear reciprocating motion; the baffle assembly and the sliding installation assembly are arranged at intervals. According to the electric brush fatigue test device and method provided by the invention, through structural design and test principle optimization, the problems of high cost, long cycle, low efficiency, low data pertinence and the like of an electric brush fatigue test in the prior art are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of testing devices, in particular to a brush fatigue test device and method. BACKGROUND

[0002] Currently, the fatigue test of the brush in the industry is usually carried out by a vibration test method, for example, referring to the standard process of method 204 "high-frequency vibration test" in GJB360B-2009, the vibration environment under the actual working condition is simulated, and whether the brush appears fatigue damage, fracture and other problems after the test is observed, so as to preliminarily judge the fatigue performance of the brush. This method can meet the basic reliability screening demand in the performance verification stage of the finished sensor and potentiometer, but when it is applied to the brush material verification or performance boundary bottom-up scene, its limitations gradually become prominent, and it is difficult to adapt to the core demand of test efficiency and cost control in the research and development stage.

[0003] The existing vibration test method has many shortcomings: first, the pre-test cost is high and the cycle is long, the brush needs to be assembled into a complete sensor or potentiometer finished product before the test, and a large amount of time and materials are consumed only in the product manufacturing link; second, the test resource dependence is high, and special vibration test equipment needs to be used, such equipment not only has high procurement and operation cost, but also the test resources are generally scarce in the industry, and queuing and waiting situation is easy to occur, which further prolongs the test cycle; third, the test efficiency is low, and only 1-3 finished products can be tested at a time, batch brush synchronous test cannot be realized, it is difficult to quickly accumulate enough reliability data, which seriously restricts the progress of brush material research and development and performance optimization.

[0004] In summary, the existing brush fatigue test technology has the problem of low test efficiency due to the dependence on complete product manufacturing, special vibration equipment and single small batch test, and cannot support the brush material verification, performance boundary bottom-up and research and development iteration demand. SUMMARY

[0005] The present application provides a brush fatigue test device and method, which aims to solve the problem of low efficiency caused by the dependence on complete product manufacturing, special vibration equipment and single small batch test in the prior art.

[0006] The technical solution of the present application is as follows:

[0007] According to one aspect of the present application, a brush fatigue test device is provided, comprising:

[0008] The utility model provides a kind of brush fatigue test device, including: frame, motion conversion component, sliding installation component and the drive assembly and baffle component connected with the frame, the drive assembly is used to provide rotary power for the motion conversion component;The one end of the motion conversion component is connected with the drive assembly, the other end is connected with the sliding installation component, the motion conversion component is used to convert rotary power into linear reciprocating motion;The baffle component is spaced apart with the sliding installation component.

[0009] Further, the frame includes a bottom plate, a front panel, an upper panel, a foot, a side panel, a rear panel; the front panel, the side panel, the rear panel are connected with the bottom plate, and the front panel, the side panel, the rear panel are connected with the upper panel; the front panel, upper panel, side panel, rear panel and the bottom plate enclose to form a containing cavity, and the drive assembly is located in the containing cavity; the foot is installed at the bottom of the bottom plate; handles are installed on both sides of the frame.

[0010] Further, the drive assembly includes a motor, a motor mounting seat, a shaft coupling, a bearing seat and an eccentric shaft, the motor is connected with the frame through the motor mounting seat, and the output end of the motor is connected with the eccentric shaft through the shaft coupling; the bearing seat is connected with the front panel, and the eccentric shaft is arranged in the bearing seat.

[0011] Further, the motion conversion component includes a transmission rod, both ends of the transmission rod are provided with rotating pairs, one end of the transmission rod is rotatably connected with the eccentric shaft through the rotating pair, and the other end is rotatably connected with the sliding installation component through the rotating pair.

[0012] Further, the sliding installation component includes a guide rail slider, a brush pressing plate, a brush mounting plate, a brush fixing plate, a quick-rotation locking piece and a slider fixing plate, the guide rail slider is connected with the front panel, the slider fixing plate is slidably connected with the guide rail slider, and the guide rail slider is connected with the transmission rod through the rotating pair; the brush fixing plate is connected with the slider fixing plate through the quick-rotation locking piece; the brush mounting plate is used for mounting a brush, and the brush mounting plate is locked on the brush fixing plate through the brush pressing plate.

[0013] Further, the baffle component includes an adjusting platform, a mounting plate and a baffle; the adjusting platform is installed on the bottom plate, and the adjusting platform is connected with the mounting plate, and the adjusting platform is used for adjusting the position of the mounting plate; the baffle is installed on the mounting plate, and an elastic clamp plate is arranged on the mounting plate, and the elastic clamp plate is used for clamping the baffle.

[0014] According to another aspect of the utility model, a brush fatigue test method is provided, including the following steps:

[0015] S1. Determine the relevant parameters of the brush fatigue test by measuring the height H1 of the brush before the test and the pressure F0 through a measuring mechanism, wherein the relevant parameters include the brush deformation amount ΔH, the test frequency f and the test times m;

[0016] S2. Install the brush to be tested on the sliding mounting assembly, and adjust the position of the baffle assembly to set the brush deformation amount ΔH; at the same time, adjust the running speed of the motor to set the test frequency f;

[0017] S3. Start the motor, and make the brush contact with the baffle on the baffle assembly and reciprocate under the driving of the sliding mounting assembly to perform the fatigue test, and record the running time of the motor to determine the test times m;

[0018] S4. After the test, measure the height H2 of the brush after the maximum deformation during the test and the pressure F1 of the brush after the test through a measuring mechanism, calculate the brush deformation amount ΔH and the brush pressure loss ΔF; at the same time, record the running times of the motor when the brush breaks, which is the fatigue life times of the brush.

[0019] Further, the brush deformation amount ΔH = H1-H2, wherein H1 is the height of the brush before the test, and H2 is the height of the brush after the maximum deformation during the test; the brush pressure loss ΔF = F0-F1, wherein F0 is the pressure of the brush before the test, and F1 is the pressure of the brush after the test.

[0020] Further, in S2, the position of the adjusting platform is adjusted to drive the mounting plate and the baffle to move to change the relative position of the baffle and the brush, so as to set the brush deformation amount ΔH.

[0021] Further, the relationship between the test frequency f and the running speed n of the motor is f = 60n, and the relationship between the test times m, the running speed n and the running time t of the motor is m = nt.

[0022] The beneficial effects of the present application are as follows:

[0023] The brush fatigue test device and method provided by the present application effectively solve the problems of high cost, long cycle, low efficiency and weak data pertinence in the prior art through structural design and test principle optimization, and provide an efficient, economical and reliable test method for material research and product development of the brush; the specific embodiments are as follows:

[0024] The device is simple in structure, replaces an expensive and scarce large general vibration test table, and effectively reduces equipment investment cost and test threshold by using a stepping motor as a power source, converting rotary motion into accurate linear reciprocating motion through an "eccentric shaft-transmission rod" mechanism, and simulating a vibration environment.

[0025] Secondly, in terms of test efficiency and flux, the brush mounting plate in the sliding mounting assembly cooperates with the quick spin lock piece to realize quick mounting and dismounting, a plurality of batches of brush tests can be realized by replacing the brush mounting plate in a short time, and the test cycle is effectively shortened.

[0026] In addition, the device can accurately set and maintain the brush deformation amount delta H in the test process through the replaceable eccentric shaft and the precise baffle component adjusting mechanism, the brush fixing plate simulates a real installation angle, the test conditions are closer to the actual working conditions, and the fatigue life, height and pressure loss data obtained are more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0028] Figure 1 is a device structure schematic diagram provided by the present application;

[0029] Figure 2 is a front view of the rack provided by the present application;

[0030] Figure 3 is a side view of the rack provided by the present application;

[0031] Figure 4 is a structure schematic diagram of the driving assembly provided by the present application;

[0032] Figure 5 is a structure schematic diagram of the motion conversion assembly provided by the present application;

[0033] Figure 6 is a structure schematic diagram of the sliding mounting assembly provided by the present application;

[0034] Figure 7 is a structure schematic diagram of the baffle assembly provided by the present application;

[0035] Figure 8 is a brush deformation schematic diagram provided by the present application.

[0036] LEGEND:

[0037] 1-frame; 11-bottom plate; 12-front panel; 13-upper panel; 14-motor drive; 15-leg; 16-handle; 17-rear panel; 2-drive assembly; 21-motor; 22-motor mount; 23-coupling; 24-bearing mount; 25-eccentric shaft; 26-limit nut; 3-motion conversion assembly; 31-drive rod; 32-rotary pair; 4-sliding mount assembly; 41-rail slider, 42-brush pressure plate; 43-brush mount plate; 44-brush fixing plate; 45-quick-rotation lock; 46-slider fixing plate; 5-baffle assembly; 51-adjustment platform; 52-mounting plate; 53-baffle. DETAILED DESCRIPTION

[0038] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as limiting the present application.

[0040] Example 1

[0041] Please refer to the accompanying drawings Figures 1-7 The present embodiment provides a brush fatigue test device, comprising:

[0042] The frame 1, the motion conversion assembly 3, the sliding mount assembly 4, the drive assembly 2 and the baffle assembly 5 connected with the frame 1, the drive assembly 2 is used for providing rotary power for the motion conversion assembly 3;

[0043] One end of the motion conversion assembly 3 is connected with the drive assembly 2, and the other end is connected with the sliding mount assembly 4, the motion conversion assembly 3 is used for converting rotary power into linear reciprocating motion; the baffle assembly 5 is arranged in the sliding mount assembly 4.

[0044] Further, the rack 1 comprises a bottom plate 11, a front panel 12, an upper panel 13, a supporting leg 15, side panels, a rear panel 17; the front panel 12, the side panels, the rear panel 17 are connected with the bottom plate 11, and the front panel 12, the side panels, the rear panel 17 are connected with the upper panel 13; the front panel 12, the upper panel 13, the side panels, the rear panel 17 and the bottom plate 11 enclose a containing cavity, and the driving assembly 2 is located in the containing cavity; the supporting leg 15 is installed at the bottom of the bottom plate 11; handles 16 are installed on the two sides of the rack 1.

[0045] The containing cavity of the rack 1 is used for containing auxiliary electrical components such as a stepping motor power supply and a driver in addition to the driving assembly 2; the combination design of the supporting leg 15 and the handle 16 further improves the moving convenience and the placing stability of the device, and adapts to the use requirements of different test sites.

[0046] Further, the driving assembly 2 comprises a motor 21, a motor mounting seat 22, a shaft coupling 23, a bearing seat 24 and an eccentric shaft 25; the motor 21 is connected with the rack 1 through the motor mounting seat 22, and the output end of the motor 21 is connected with the eccentric shaft 25 through the shaft coupling 23; the bearing seat 24 is connected with the front panel 12, and the eccentric shaft 25 is arranged in the bearing seat 24.

[0047] The motor 21 is a stepping motor, and the motor 21 is also matched with a motor driver 14; the motor driver 14 not only can drive the motor 21 to operate, but also can accurately control the operating speed of the motor 21 through adjusting an output signal, so as to realize flexible adjustment of a test frequency; the motor driver is a prior art, and will not be further described here.

[0048] The bearing seat 24 is provided with double bearings, and the eccentric shaft 25 is arranged in the double bearings; the double bearing structure of the bearing seat 24 can ensure the installation firmness of the eccentric shaft 25, effectively reduce the gap in the operating process of the eccentric shaft 25, and avoid affecting the test accuracy due to the shafting shaking;

[0049] Further, the motion conversion assembly 3 comprises a transmission rod 31, and rotating pairs 32 are arranged at the two ends of the transmission rod 31; one end of the transmission rod 31 is rotationally connected with the eccentric shaft 25 through the rotating pair 32, and the other end is rotationally connected with the sliding installation assembly 4 through the rotating pair 32.

[0050] In the embodiment, the rotating pairs 32 are bearings, which are respectively installed at the two ends of the transmission rod 31.

[0051] A limiting nut 26 is installed at the end of the eccentric shaft 25, which is used for locking the transmission rod 31 of the motion conversion assembly 3, and a boss is processed on the limiting nut 26; the boss design of the limiting nut 26 can avoid interference with the bearings on the transmission rod 31 in the tightening process, and ensure the smoothness of the assembly and maintenance operation; the principle is as follows:

[0052] The diameter of the boss is the same as that of the inner ring of the aforementioned rotating pair 32 bearing; when the limit nut 26 is tightened, the locking force is transmitted through the path of the boss, the inner ring of the bearing and the eccentric shaft 25, avoiding the outer ring of the bearing, thereby fixing the inner ring of the bearing while allowing the outer ring to rotate without interference.

[0053] Furthermore, the sliding mounting assembly 4 includes a guide rail slider 41, a brush pressure plate 42, a brush mounting plate 43, a brush fixing plate 44, a quick-release locking element 45, and a slider fixing plate 46. The guide rail slider 41 is connected to the front panel 12, and the slider fixing plate 46 is slidably connected to the guide rail slider 41. The guide rail slider 41 is connected to the transmission rod 31 through a rotating joint 32. The brush fixing plate 44 is connected to the slider fixing plate 46 through the quick-release locking element 45. The brush mounting plate 43 is used to mount the brush, and the brush mounting plate 43 is locked onto the brush fixing plate 44 by the brush pressure plate 42.

[0054] The brushes on the brush mounting plate 43 are fixed by spot welding. 10 to 20 brushes can be fixed at a time by spot welding. The design of fixing a large number of brushes by spot welding enables batch testing, which greatly improves the testing efficiency and allows for the rapid accumulation of reliability data.

[0055] In this embodiment, the brush pressure plate 42 can be connected to the brush fixing plate 44 by bolts; when the bolts are tightened, the brush pressure plate 42 firmly presses the brush mounting plate 43 onto the brush fixing plate 44.

[0056] The mounting surface of the brush fixing plate 44 is tilted, which is consistent with the mounting angle of the brush in actual sensor and potentiometer products. The angle design of the brush fixing plate 44 can simulate the actual working conditions of the brush, ensure the consistency between the test results and the actual application scenario, and improve the reference value of the data.

[0057] In this embodiment, with Figure 6 For reference, the tilt angle can be set to 120° with the horizontal plane. Considering the actual working conditions of different products, the tilt angle can be selected and set in the range of 115° to 130° according to the specifications of the brush being tested.

[0058] The quick-release locking element 45 allows for tightening and loosening without the need for tools. This convenient operation simplifies the brush installation and removal process, facilitating height and pressure tests on the brushes and reducing testing time. The brush mounting plate 43, in conjunction with the quick-release locking element 45, enables rapid installation and removal, allowing for multiple batches of brush tests to be performed in a short time by replacing the brush mounting plate 43. For reference, in this embodiment, the quick-release locking element 45 is a hand-tightening nut.

[0059] The guide rail slider 41 not only realizes the sliding connection, but also guarantees the straightness precision of the reciprocating movement of the sliding installation assembly 4. The straightness precision of the guide rail slider 41 avoids abnormal contact between the brush and the baffle assembly 5 due to movement deviation, and ensures the stability of the test process.

[0060] Further, the baffle assembly 5 includes an adjusting platform 51, a mounting plate 52, and a baffle 53. The adjusting platform 51 is installed on the bottom plate 11, and the adjusting platform 51 is connected with the mounting plate 52. The adjusting platform 51 is used to adjust the position of the mounting plate 52. The baffle 53 is installed on the mounting plate 52, and the mounting plate 52 is provided with an elastic clamping plate used to clamp the baffle 53.

[0061] The adjusting platform 51 has the function of precise adjustment in the horizontal axis direction, and the adjustment accuracy can adapt to the fine adjustment requirement of the brush deformation variable AH. The precise adjustment function in the horizontal axis direction provides guarantee for the accurate setting of the brush deformation variable AH, and can flexibly adjust the degree of brush deformation according to the test requirement, thereby improving the controllability of the test parameters. In the embodiment, the adjusting platform 51 is adjusted in the horizontal axis direction by rotating the handle. The driving mode can also be a cylinder or a stepping motor. The specific driving mode and driving principle are prior art, and will not be further described here.

[0062] The baffle 53 is made of a material with high light transmittance and high surface finish, and the surface roughness is much lower than that of a traditional metal contact. The baffle 53 with high surface finish can ensure smooth and smooth contact with the brush contact, avoid brush contact wear or damage due to rough contact surface, reduce invalid loss in the test process, ensure that the test result only reflects the brush fatigue characteristics, and improve the data accuracy. In the embodiment, the baffle 53 is made of a glass plate.

[0063] The clamping mode of the elastic clamping plate guarantees the firmness of the baffle 53 while avoiding the risk of baffle 53 breakage caused by rigid clamping, thereby reducing the cost of test consumables.

[0064] Embodiment 2

[0065] Please refer to the accompanying drawings Figures 1-8 On the basis of embodiment 1, the embodiment provides a brush fatigue test method, which includes the following steps:

[0066] S1. Measure the height H1 and the pressure F0 of the brush before the test by the measuring mechanism, and determine the related parameters of the brush fatigue test, including the brush deformation variable AH, the test frequency f, and the test times m.

[0067] S2. Install the brush to be tested on the sliding installation assembly 4, and adjust the position of the baffle assembly 5 to set the brush deformation variable AH. At the same time, adjust the operating speed of the motor 21 to set the test frequency f.

[0068] S3. Start the motor 21, and make the brush contact with the baffle 53 on the baffle assembly 5 and reciprocate under the drive of the sliding installation assembly 4, perform the fatigue test, and record the motor 21 running time to determine the test number m.

[0069] S4. After the test, measure the height H2 of the brush after the maximum deformation during the test and the brush pressure F1 after the test by the measuring mechanism, calculate the brush deformation amount AH and the brush pressure loss AF; at the same time, record the running number of the motor 21 when the brush breaks, which is the fatigue life number of the brush.

[0070] Further, the brush deformation amount AH = H1-H2, where H1 is the height of the brush before the test, and H2 is the height of the brush after the maximum deformation during the test; the brush pressure loss AF = F0-F1, where F0 is the brush pressure before the test, and F1 is the brush pressure after the test.

[0071] Reference Figure 8 In this embodiment, the brush height refers to the vertical projection of the free end vertex of the brush (i.e. the contact point with the baffle 53) onto the horizontal line, and the distance between the projection point and the starting point of the brush on the horizontal line is the brush height (corresponding to the amplitude in the traditional vibration test).

[0072] The physical meaning of the brush deformation amount AH corresponds to the "amplitude" in the traditional vibration test, that is, by setting AH, the maximum deformation degree of the brush under actual vibration working conditions can be simulated.

[0073] Further, in S2, by changing the position of the adjusting platform 51, the mounting plate 52 and the baffle 53 are moved to change the relative position of the baffle 53 and the brush, so as to set the brush deformation amount AH.

[0074] Specifically, by adjusting the adjusting platform 51 to drive the baffle 53 to move towards the sliding installation assembly 4, the deformation amount AH of the brush can be increased; on the contrary, the deformation amount AH is reduced.

[0075] Further, the relationship between the test frequency f and the motor 21 running speed n is f = 60n, and the relationship between the test number m and the motor 21 running speed n and the running time t is m = nt.

[0076] The above description is not intended to limit the present application in any form, although the present application has been disclosed as above through examples, however, not intended to limit the present application, any skilled person in the art, without departing from the technical solution of the present application, can make some changes or modifications to the above disclosed technical content as equivalent embodiments, but as long as it does not deviate from the technical solution of the present application, any simple modification, equivalent change and modification made to the above examples according to the technical essence of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A brush fatigue testing device, characterized in that, The utility model relates to a kind of movable installation of sliding block, including: Rack (1), motion conversion assembly (3), sliding installation assembly (4) and the drive assembly (2) and baffle assembly (5) connected with the rack (1), the drive assembly (2) is used to provide rotating power for the motion conversion assembly (3);The one end of the motion conversion assembly (3) is connected with the drive assembly (2), the other end is connected with the sliding installation assembly (4), the motion conversion assembly (3) is used to convert rotating power into linear reciprocating motion;The baffle assembly (5) is spaced apart with the sliding installation assembly (4).

2. The apparatus of claim 1, wherein, The rack (1) includes bottom plate (11), front panel (12), upper panel (13), foot (15), side plate, back panel (17);The front panel (12), the side plate, the back panel (17) are connected with the bottom plate (11), and the front panel (12), the side plate, the back panel (17) are connected with the upper panel (13);The front panel (12), upper panel (13), side plate, back panel (17) and the bottom plate (11) are enclosed to form containing cavity, and the drive assembly (2) is located in the containing cavity;The foot (15) is installed at the bottom of the bottom plate (11);Handle (16) is installed on the both sides of the rack (1).

3. The apparatus of claim 2, wherein, The drive assembly (2) includes motor (21), motor mounting seat (22), shaft coupling (23), bearing seat (24) and eccentric shaft (25), the motor (21) is connected with the rack (1) by the motor mounting seat (22), and the output end of the motor (21) is connected with the eccentric shaft (25) by the shaft coupling (23);The bearing seat (24) is connected with the front panel (12), and the eccentric shaft (25) is arranged in the bearing seat (24).

4. The apparatus of claim 3, wherein, The motion conversion assembly (3) includes transmission rod (31), and both ends of the transmission rod (31) are provided with rotation pair (32), one end of the transmission rod (31) is rotatably connected with the eccentric shaft (25) by the rotation pair (32), and the other end is rotatably connected with the sliding installation assembly (4) by the rotation pair (32).

5. The apparatus of claim 4, wherein, The sliding installation assembly (4) includes guide rail sliding block (41), brush pressure plate (42), brush mounting plate (43), brush fixing plate (44), quick-rotating locking piece (45) and sliding block fixing plate (46), the guide rail sliding block (41) is connected with the front panel (12), the sliding block fixing plate (46) is slidably connected with the guide rail sliding block (41), and the guide rail sliding block (41) is connected with the transmission rod (31) by the rotation pair (32);The brush fixing plate (44) is connected with the sliding block fixing plate (46) by the quick-rotating locking piece (45);The brush mounting plate (43) is used to install brush, and the brush mounting plate (43) is locked on the brush fixing plate (44) by the brush pressure plate (42).

6. The apparatus of claim 5, wherein, The baffle assembly (5) comprises an adjusting platform (51), a mounting plate (52) and a baffle (53); the adjusting platform (51) is mounted on the bottom plate (11), and the adjusting platform (51) is connected with the mounting plate (52), and the adjusting platform (51) is used for adjusting the position of the mounting plate (52); the baffle (53) is mounted on the mounting plate (52), and the mounting plate (52) is provided with an elastic clamping plate, and the elastic clamping plate is used for clamping the baffle (53).

7. A brush fatigue test method characterized by, The brush fatigue test device according to any one of claims 1-6, comprising the following steps: S1. measuring the height H1 and the pressure F0 of the brush before the test by the measuring mechanism, and determining the related parameters of the brush fatigue test, the related parameters including the brush deformation amount ΔH, the test frequency f and the test times m; S2. installing the brush to be tested on the sliding mounting assembly (4), and adjusting the position of the baffle assembly (5) to set the brush deformation amount ΔH; at the same time, adjusting the running speed of the motor (21) to set the test frequency f; S3. starting the motor (21), so that the brush is in contact with the baffle (53) on the baffle assembly (5) and reciprocates under the driving of the sliding mounting assembly (4), and the fatigue test is performed, and the running time of the motor (21) is recorded to determine the test times m; S4. After the test, measuring the height H2 of the brush after the maximum deformation during the test and the pressure F1 of the brush after the test by the measuring mechanism, and calculating the brush deformation amount ΔH and the brush pressure loss ΔF; at the same time, recording the running times of the motor (21) when the brush breaks, which is the brush fatigue life times.

8. The brush fatigue test method according to claim 7, characterized by The brush deformation amount ΔH = H1-H2, wherein H1 is the height of the brush before the test, and H2 is the height of the brush after the maximum deformation during the test; the brush pressure loss ΔF = F0-F1, wherein F0 is the pressure of the brush before the test, and F1 is the pressure of the brush after the test.

9. The brush fatigue test method according to claim 7, characterized by In S2, the position of the adjusting platform (51) is adjusted to drive the mounting plate (52) and the baffle (53) to move, so as to change the relative position of the baffle (53) and the brush, and thus set the brush deformation amount ΔH.

10. The brush fatigue test method according to claim 7, characterized by The relationship between the test frequency f and the running speed n of the motor (21) is f=60n, and the relationship between the test times m and the running speed n and the running time t of the motor (21) is m=nt.

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