CN101526576B - Reliability tester for button master control electrical apparatus - Google Patents
Reliability tester for button master control electrical apparatus Download PDFInfo
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- CN101526576B CN101526576B CN2009100616493A CN200910061649A CN101526576B CN 101526576 B CN101526576 B CN 101526576B CN 2009100616493 A CN2009100616493 A CN 2009100616493A CN 200910061649 A CN200910061649 A CN 200910061649A CN 101526576 B CN101526576 B CN 101526576B
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Abstract
The invention belongs to the low voltage-apparatus reliability test field, in particular to an instrument for reliability test on the button master control electrical apparatus. A reliability tester for the button master control electrical apparatus comprises a base, a support frame, an actuating unit, an actuating mechanism, a cam, a flexible contact pressuring mechanism, and a double buffering pressing mechanism; wherein, the actuating mechanism comprises a shaft joint and a transmission shaft; the cam is fixed in the middle of the transmission shaft; the flexible contact pressuring mechanism comprises a third rolling bearing, a kerve seat, a first stationary shaft, a fourth rolling bearing, a second stationary shaft; the double buffering pressing mechanism comprises a first spring, a guide sleeve, a pressure bar, a pressure headgear, a fastening head, a linear bearing, a second spring, a dynamic pressure head, the first spring is sleeved on the upper end part of the pressure bar; the lower end part of the pressure bar is connected with the upper end part of the pressure headgear by a thread; the lower part of the pressure headgear is internally provided with a spring cavity; the lower end part of the dynamic pressure head passes through a hole on the fastening head and is arranged outside of the fastening head which is connected with the pressure headgear by a thread. The invention is characterized by simple structure and simple and convenient operation.
Description
Technical field
The invention belongs to low-voltage electrical apparatus fail-test field, be specifically related to a kind of instrument that button master control electrical apparatus is carried out fail-test.
Background technology
Along with the continuous progress of China's manned spaceflight technology and the development of national defence high, precision and frontier weaponry technology, the research of reliability engineering has entered a flourish stage, from research object, the research of aspects such as high reliability, System in Small Sample Situation and large complicated mechanical system has become the research center of gravity.Button master control electrical apparatus is as the control element most widely used in the various control equipments, that use is the most general, be to connect, conversion, cut off the important components and parts that the mutual signal of element, circuit, equipment and electric power transmit, reliability consideration for this high reliability request device of button master control electrical apparatus still belongs to weak link at home, and its research breadth and depth all has a certain distance with advanced international standard.
At present the low-voltage electrical apparatus fail-test is mainly concentrated on the reliability test of Contactor Type Relay Reliability Test Analysis, overload relay, the method for electromagnetic switch electrical endurance test, these three kinds of situations are studied three series products in the low-voltage electrical apparatus respectively, and mostly be probing into of reliability test method, test unit is related to seldom, especially button master control electrical apparatus fail-test aspect is not related to.Button master control electrical apparatus has significant effects as the control element most widely used in the various control equipments, that use is the most general to the entire equipment reliability, and it is carried out various fail-tests and test to have important economic benefit and social benefit.
The test of button master control electrical apparatus make-break capacity is divided into: exchange make-break capacity test and the test of direct current make-break capacity.
The test of interchange make-break capacity is examination or the connection of studying the button master control electrical apparatus that is used for alternating circuit and disjunction energy.This is the test of a simulation, and when in the main analog AC circuit various overloads or short trouble taking place, the button master control electrical apparatus of installing in the circuit should be able in time be connected and this fault current of disjunction reliably.Button master control electrical apparatus is also wanted the normal working current of break-make continually, promptly non-fault current except that necessary reliable all fault currents of break-make.
The test of direct current make-break capacity is examination or the connection of studying the button master control electrical apparatus that is used for DC circuit and breaking capacity.It is when in the analog DC circuit various overloads or short trouble taking place, the button master control electrical apparatus of installing in the circuit a kind of test of this fault current of break-make reliably in time.Direct current make-break capacity test except that power supply and part test equipment with exchange make-break capacity test different, other is all very approaching.
Electric life be meant under the normal running conditions of defined master control electrical apparatus need repairing or renewal part and can bear the load operation number of times arranged.So the electrical endurance test of button master control electrical apparatus is a kind of test of simulating its break-make running current in actual motion.
The purpose of electrical endurance test mainly is the electrical equipment wearing quality of examination electrical contact and contact system.The difference of it and make-break capacity test is: the electric current of make-break capacity test institute break-make is that to belong to the electric current and the test number (TN) of nature of trouble few, and the electric current of electrical endurance test institute break-make is the electric current of operate as normal, and test number (TN) is much more.
Summary of the invention
The object of the present invention is to provide a kind of reliability tester for button master control electrical apparatus simple in structure, simple to operation.
To achieve these goals, technical scheme of the present invention is: reliability tester for button master control electrical apparatus, and it comprises base, bracing frame, actuating unit, gear train, cam, flexible contact mechanism, double buffering pressing mechanism;
Gear train comprises shaft coupling, transmission shaft, the left part of transmission shaft links to each other with the clutch shaft bearing seat by first rolling bearing, the right part of transmission shaft links to each other with second bearing seat by second rolling bearing, clutch shaft bearing seat, second bearing seat are separately fixed on the bracing frame, and bracing frame is fixed on the base; The left end of transmission shaft is linked to each other with the output shaft of actuating unit by shaft coupling;
Cam is fixed on the middle part of transmission shaft;
Flexible contact mechanism comprises the 3rd rolling bearing, kerve seat, first stationary shaft, the 4th rolling bearing, second stationary shaft, the kerve seat is provided with U-lag, the 3rd rolling bearing, the 4th rolling bearing are positioned at the U-lag on the kerve seat, the 3rd rolling bearing is fixedlyed connected with the kerve seat by first stationary shaft, and the 4th rolling bearing is fixedlyed connected with the kerve seat by second stationary shaft; The 3rd rolling bearing, the 4th rolling bearing are positioned at the below of cam and contact with cam; The bottom of kerve seat links to each other with the upper end of the press rods of double buffering pressing mechanism;
The double buffering pressing mechanism comprises first spring, orienting sleeve, press rods, pressure headgear, fastener head, linear bearing, second spring, dynamic pressure head, linear bearing is passed on the top of press rods, linear bearing is arranged in the orienting sleeve, and orienting sleeve is fixed on the cross bar of bracing frame; First spring housing is in the upper end of press rods, and the upper end of first spring contacts with the bottom surface of kerve seat, and the lower end of first spring contacts with the upper surface of orienting sleeve; The upper end of the bottom of press rods and pressure headgear is by being threaded; The dynamic pressure head is staircase structure, and the upper diameter of dynamic pressure head is greater than lower diameter; Be provided with spring cavity in the bottom of pressure headgear, the top of second spring, dynamic pressure head is positioned at spring cavity, and the lower end of second spring contacts with the upper end of dynamic pressure head; The hole that the bottom of dynamic pressure head is passed on the fastener head is positioned at outside the fastener head, and fastener head is connected with the manometric head external threading;
The below of dynamic pressure head is provided with button master control electrical apparatus, and button master control electrical apparatus is positioned on the base.
The beneficial effects of the utility model are:
1, reliability tester for button master control electrical apparatus adopts said structure, has simple in structure, all kinds of button-type low-voltage electrical apparatus fail-tests of adaptation, big, the test simple and convenient (simple to operation) of range of application, data reliable characteristics.
2, flexible contact mechanism adopts duplex bearing group (the 3rd rolling bearing and the 4th rolling bearing), has realized that the flexibility of cam and press rods presses, and has reduced the frictional dissipation of cam, has reduced the work noise of instrument.
3, the design of double buffering pressing mechanism has reduced the hard breakdown of press rods to laboratory sample, has reduced the influence of test vibrations to experimental data, has improved the accuracy of instrument test.
4, Design of cam curves is pushed stroke to button master control electrical apparatus and is simulated, improved the accuracy of data, by press rods screw thread fine setting (upper end of the bottom of press rods and pressure headgear is by being threaded), can change the simulation of stroke realization to all kinds of button strokes.
Description of drawings
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is the partial enlarged drawing of Fig. 1 middle and upper part;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the flexible enlarged drawing that presses double buffering cam pressure lever mechanism among Fig. 1;
Fig. 5 is the right view of Fig. 1 cam;
Fig. 6 is the enlarged drawing of flexible contact mechanism among Fig. 1;
Fig. 7 is the vertical view of Fig. 6;
Fig. 8 is Fig. 6 left view.
Among the figure: 1-motor, 2-shaft coupling, 3-first rolling bearing, 4-transmission shaft, the 5-cam, 6-the 3rd rolling bearing, 7-kerve seat, 8-first stationary shaft, 9-second bearing seat, 10-bracing frame, 11-first spring, 12-orienting sleeve, the 13-press rods, 14-pressure headgear, 15-fastener head, 16-button master control electrical apparatus, the 17-base, 18-linear bearing, 19-clamp nut, 20-second spring, 21-dynamic pressure head, 22-rubber blanket, 23-the 4th rolling bearing, 24-second stationary shaft.
Embodiment
The present invention will be further described in conjunction with the accompanying drawings with specific embodiment below, referring to Fig. 1 to Fig. 8.
As Fig. 1, Fig. 2, shown in Figure 3, reliability tester for button master control electrical apparatus, it comprises base 17, bracing frame 10, actuating unit, gear train, cam 5, flexible contact mechanism, double buffering pressing mechanism;
Gear train comprises shaft coupling 2, transmission shaft 4, the left part of transmission shaft 4 is by first rolling bearing 3 link to each other with the clutch shaft bearing seat (left end of clutch shaft bearing seat is fixedly clamped with axial back-up ring), the right part of transmission shaft 4 is by second rolling bearing link to each other with second bearing seat 9 (right-hand member of second bearing seat is fixedly clamped with axial back-up ring), clutch shaft bearing seat, second bearing seat 9 are separately fixed on the bracing frame 10, and bracing frame 10 is fixed on the base 17; The left end of transmission shaft 4 is linked to each other with the output shaft of actuating unit by shaft coupling 2;
As Fig. 4, shown in Figure 5, cam 5 is fixed on the middle part (fix by a flat key, the cam left side is fixed by axial back-up ring, and the right side is fixed by the shaft shoulder of transmission shaft) of transmission shaft 4;
As Fig. 6, Fig. 7, shown in Figure 8, flexible contact mechanism comprises the 3rd rolling bearing 6, kerve seat 7, first stationary shaft 8, the 4th rolling bearing 23, second stationary shaft 24, kerve seat 7 is provided with U-lag, the 3rd rolling bearing 6, the 4th rolling bearing 23 is positioned at the U-lag on the kerve seat 7, the 3rd rolling bearing 6 is fixedlyed connected with kerve seat 7 by first stationary shaft 8 that (screwing on nut on first stationary shaft fixes, be fixedly clamped), the 4th rolling bearing 23 is fixedlyed connected (screw on nut on second stationary shaft and fix, be fixedly clamped) by second stationary shaft 24 with kerve seat 7; The 3rd rolling bearing 6, the 4th rolling bearing 23 are positioned at the below of cam 5 and contact with cam 5; The bottom of kerve seat 7 link to each other with the upper end of the press rods 13 of double buffering pressing mechanism (can adopt welding fixing, also can adopt hinged) by pin;
As shown in Figure 4, the double buffering pressing mechanism comprises first spring 11, orienting sleeve 12, press rods 13, pressure headgear 14, fastener head 15, linear bearing 18, second spring 20, dynamic pressure 21, rubber blanket 22, linear bearing 18 is passed on the top of press rods 13, linear bearing 18 is arranged in the orienting sleeve 12, and orienting sleeve 12 fixing (welding) is on the cross bar of bracing frame 10; First spring 11 is enclosed within the upper end of press rods 13, and the upper end of first spring 11 contacts with the bottom surface of kerve seat 7, and the lower end of first spring 11 contacts with the upper surface of orienting sleeve 12; The upper end of the bottom of press rods 13 and pressure headgear 14 is by be threaded (fastening by clamp nut 19); Dynamic pressure 21 is staircase structure, and the upper diameter of dynamic pressure 21 is greater than lower diameter; Be provided with spring cavity in the bottom of pressure headgear 14, the top of second spring 20, dynamic pressure 21 is positioned at spring cavity, and the upper end of the lower end of second spring 20 and dynamic pressure 21 contacts; The hole that the bottom of dynamic pressure 21 is passed on the fastener head 15 is positioned at outside the fastener head 15, and fastener head 15 is threaded with pressure headgear 14.
The below of dynamic pressure 21 is provided with button master control electrical apparatus 16, and button master control electrical apparatus 16 is positioned on the base 17.
Actuating unit is a motor (threephase asynchronous) 1, and motor 1 is fixed on the base 17.
Actuating unit also can adopt by motor (threephase asynchronous) 1 and reductor to be formed, and motor 1 is fixed on the base 17, and the output shaft of motor links to each other with the input of reductor, and the output shaft of reductor is the output shaft of actuating unit.
The lower end screw thread of dynamic pressure 21 is connected with rubber blanket 22.
As shown in Figure 4, flexibility presses double buffering cam pressure lever mechanism and is made up of cam 5, flexible contact mechanism and double buffering pressing mechanism.
The curve of cam is divided into four parts, a long-range camber line A, and a short range camber line C, long-range camber line also has the excessive camber line D of a short range camber line to long-range camber line to section camber line B that crosses of short range camber line.The semidiameter of long-range camber line A and short range camber line C is exactly the stroke of the button of button master control electrical apparatus, can finely tune stroke according to threaded adjusting, thereby satisfy the stroke demand of pushing of inhomogeneous button.
When reliability tester for button master control electrical apparatus was started working, the output shaft of actuating unit (threephase asynchronous) drove transmission shaft by shaft coupling and rotates, and cam begins to rotate under the drive of transmission shaft.When cam turns to remote spots by the short range point, the bearing pack drive bearing that cam is oppressed flexible contact mechanism rotates along equidirectional, thereby the flexibility that realizes cam and flexible contact mechanism presses and drives press rods and moves downward, under the compressing of kerve seat, first length of spring compressed, press rods drive dynamic pressure 21 pairs of button master control electrical apparatus (test specimen) 16 downwards and push under the guiding of orienting sleeve and linear bearing; Simultaneously linear bearing is lubricated press rods and the lubricating oil of flexible contact mechanism is intercepted, and prevents lubricating oil downslide test for contamination sample.When press rods is pressed into pushbutton switch stroke lowest order, second spring in the pressure headgear 14 is compressed, reduce press rods and the rigidity of test specimen is pushed and the press rods overtravel is converted into the length of spring compressed distance, thereby the two-stage spring has played the double buffering effect to whole depression bar in the process of pushing.In addition, the rubber mats on the dynamic pressure head has also played buffer action to press rods to the rigid shock of test specimen; When cam turned to short range point by remote spots, under the effect of spring reset power, flexible contact mechanism and unit head resetted, and the test specimen switch resets.Thereby under the effect of cam pressing force and spring reset power, realize the straight reciprocating motion of press rods, the button of button master control electrical apparatus is pressed and unclamped (switch resets), can carry out make-break capacity test and electrical endurance test at vertical direction.
When dissimilar button master control electrical apparatus is tested, because cam curve analog buttons type master control electrical apparatus is pushed the stroke design, only need that the press rods connection of thread is carried out highly fine setting and can satisfy the needs that the inhomogeneity button master control electrical apparatus is pushed stroke.Simultaneously, a need change motor speed can be realized the simulation to inhomogeneity button master control electrical apparatus pressing force.
Experimental test
According to experiment process, LA42 type button master control electrical apparatus has been carried out reliable life experiment, experimental result is as follows:
According among GB14048.1-2006 and the GB15092.1-2003 to the reliability of service life test index of device for switching as can be known the sample fails criterion be:
Record test specimen when certain stress level operate as normal by test, are respectively turn-on time in the single cycle and trip time T1 and T2.Represent with T3 detected turn-on time, represent with T4 detected trip time.Analyze the time criterion of melting welding, disconnection, three kinds of failure modes of loose contact and make regulation.
Regulation: when T3＞(2～3) T1, be judged as the test specimen contact melted.
When T4＞(2～3) T2, be judged as the test specimen contact and disconnect.
When T3＜(0.5～0.8) T1 and T4＜(0.5～0.8) T2, be judged as the test specimen loose contact.
The first step: the test specimen that experiment records is connected, trip time is as shown in table 1 below,
Table 1 is make-and-break time table (ms) accurately
| Maximal value | Minimum value | Mean value | |
| Turn-on time | 365.36 | 326.65 | 336.35 |
| Trip time | 668.11 | 661.98 | 662.97 |
| T.T. | 1007.68 | 990.71 | 993.48 |
Second step: experiment records connection, the trip time of the test specimen of time-delay influence.It is as shown in table 2 below,
Table 2 has the make-and-break time table (ms) of time-delay
| Maximal value | Minimum value | Mean value | |
| Turn-on time | 497.37 | 423.12 | 463.60 |
| Trip time | 566.21 | 433.05 | 494.76 |
| T.T. | 1045.58 | 873.05 | 957.89 |
The 3rd step: time of recording of first two steps relatively, by the upper computer software Compensation Regulation connect, be the time to first failure (MTTF) of test specimen trip time.It is as shown in table 3 below,
Table 3 test figure statistical form
Data simple process such as following table 4,
Table 4 test figure simple process table
| Maximal value | 42981 | Minimum value | ?24320 | Mean value | ?33992 |
| Variance | 65704322 | Standard deviation | 8105 |
In process of the test, table one is the make-and-break time value and the life-span time numerical value of laboratory sample to table three, and table four is the analysis of experimental data value.By test data analyzer as can be known, the mean value of laboratory sample is 33992 times, meets realistic average statistical 35000 times substantially, and disconnection and two kinds of situations of melting welding have appearred in the test specimen failure mode, conform to the considered repealed form.In sum, this test findings is accurate, and experimental data has certain researching value.
Claims (3)
1. reliability tester for button master control electrical apparatus, it comprises base (17), bracing frame (10), actuating unit, gear train, cam (5), flexible contact mechanism, double buffering pressing mechanism;
Gear train comprises shaft coupling (2), transmission shaft (4), the left part of transmission shaft (4) links to each other with the clutch shaft bearing seat by first rolling bearing (3), the right part of transmission shaft (4) links to each other with second bearing seat (9) by second rolling bearing, clutch shaft bearing seat, second bearing seat (9) are separately fixed on the bracing frame (10), and bracing frame (10) is fixed on the base (17); The left end of transmission shaft (4) is linked to each other with the output shaft of actuating unit by shaft coupling (2);
Cam (5) is fixed on the middle part of transmission shaft (4);
Flexible contact mechanism comprises the 3rd rolling bearing (6), kerve seat (7), first stationary shaft (8), the 4th rolling bearing (23), second stationary shaft (24), kerve seat (7) is provided with U-lag, the 3rd rolling bearing (6), the 4th rolling bearing (23) are positioned at the U-lag on the kerve seat (7), the 3rd rolling bearing (6) is fixedlyed connected with kerve seat (7) by first stationary shaft (8), and the 4th rolling bearing (23) is fixedlyed connected with kerve seat (7) by second stationary shaft (24); The 3rd rolling bearing (6), the 4th rolling bearing (23) are positioned at the below of cam (5) and contact with cam (5); The bottom of kerve seat (7) links to each other with the upper end of the press rods (13) of double buffering pressing mechanism;
The double buffering pressing mechanism comprises first spring (11), orienting sleeve (12), press rods (13), pressure headgear (14), fastener head (15), linear bearing (18), second spring (20), dynamic pressure head (21), linear bearing (18) is passed on the top of press rods (13), linear bearing (18) is arranged in the orienting sleeve (12), and orienting sleeve (12) is fixed on the cross bar of bracing frame (10); First spring (11) is enclosed within the upper end of press rods (13), and the upper end of first spring (11) contacts with the bottom surface of kerve seat (7), and the lower end of first spring (11) contacts with the upper surface of orienting sleeve (12); The upper end of the bottom of press rods (13) and pressure headgear (14) is by being threaded; Dynamic pressure head (21) is staircase structure, and the upper diameter of dynamic pressure head (21) is greater than lower diameter; Be provided with spring cavity in the bottom of pressure headgear (14), the top of second spring (20), dynamic pressure head (21) is positioned at spring cavity, and the lower end of second spring (20) contacts with the upper end of dynamic pressure head (21); The hole that the bottom of dynamic pressure head (21) is passed on the fastener head (15) is positioned at outside the fastener head (15), and fastener head (15) is threaded with pressure headgear (14);
The below of dynamic pressure head (21) is provided with button master control electrical apparatus (16), and button master control electrical apparatus (16) is positioned on the base (17).
2. reliability tester for button master control electrical apparatus according to claim 1, it is characterized in that: actuating unit is made up of threephase asynchronous and reductor, threephase asynchronous is fixed on the base, the output shaft of threephase asynchronous links to each other with the input of reductor, and the output shaft of reductor is the output shaft of actuating unit.
3. reliability tester for button master control electrical apparatus according to claim 1 is characterized in that: the lower end screw thread of dynamic pressure head (21) is connected with rubber blanket (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100616493A CN101526576B (en) | 2009-04-20 | 2009-04-20 | Reliability tester for button master control electrical apparatus |
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| CN2009100616493A CN101526576B (en) | 2009-04-20 | 2009-04-20 | Reliability tester for button master control electrical apparatus |
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| CN101526576B true CN101526576B (en) | 2011-12-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102735954B (en) * | 2011-04-14 | 2016-04-06 | 钟柏根 | Test device for service life of toaster |
| CN103135050B (en) * | 2011-11-22 | 2016-07-13 | 海洋王照明科技股份有限公司 | Button testing device |
| CN103913384A (en) * | 2013-01-08 | 2014-07-09 | 陕西汉江机床有限公司 | Axial rigidity measuring apparatus of ball screw assembly |
| CN109374284B (en) * | 2018-12-19 | 2024-05-17 | 中壹发展八五零电子有限公司 | Rotary switch mechanical life testing machine and testing method |
| CN110554311B (en) * | 2019-09-23 | 2023-09-19 | 徐州蓝湖信息科技有限公司 | Switch touch life detector |
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| CN201083812Y (en) * | 2007-09-17 | 2008-07-09 | 许晓华 | Switch life-span detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201083812Y (en) * | 2007-09-17 | 2008-07-09 | 许晓华 | Switch life-span detection device |
Non-Patent Citations (1)
| Title |
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| 孙明，袁海文，荣命哲.按钮开关接触可靠性的一种测试装置.《低压电器》.1996,(第2期),51－52. * |
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