CN113447807A - Microswitch service life detection device and detection method - Google Patents
Microswitch service life detection device and detection method Download PDFInfo
- Publication number
- CN113447807A CN113447807A CN202110752414.XA CN202110752414A CN113447807A CN 113447807 A CN113447807 A CN 113447807A CN 202110752414 A CN202110752414 A CN 202110752414A CN 113447807 A CN113447807 A CN 113447807A
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- microswitch
- driving mechanism
- service life
- module
- detection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
Abstract
The invention relates to a microswitch service life detection device and a microswitch service life detection method. The invention aims to provide a microswitch service life detection device which can simulate the use state of a microswitch and can also detect the service life of the microswitch. The invention adopts the following scheme: a microswitch life detection device includes: the positioning mechanism is used for positioning the microswitch to be detected; the pressing mechanism is positioned between the driving mechanism and the positioning mechanism and is used for converting the circular motion of the driving mechanism into linear reciprocating motion so as to press the elastic sheet of the microswitch at intervals; the detection module is used for detecting the working current change of the driving mechanism; and the timing module is used for recording the time length T1 from the time when the pressing mechanism starts to normally press the microswitch to the time when the detection module detects that the change value of the working current of the driving mechanism exceeds the set value. The invention has the advantages of simulating the use state of the microswitch and detecting the service life of the microswitch.
Description
Technical Field
The invention relates to a microswitch service life detection device and a microswitch service life detection method.
Background
In order to ensure the product quality of the micro switch and improve the reliability of the micro switch in use, the micro switch needs to be subjected to service life detection. The invention discloses an invention patent application document with publication number CN110244220A in 2019, 9 and 17, and discloses a microswitch service life testing control device, which is used for controlling the on and off of a microswitch in a low-temperature environment of-50 ℃ to-70 ℃, and comprises the following steps: the guide rod outer sleeve is used for being assembled on the low-temperature box, an inner guide rod is arranged in the guide rod outer sleeve and can be matched with the guide rod outer sleeve in a sliding mode along the axial direction of the guide rod outer sleeve, one end of the inner guide rod is a control end and is used for being connected with a micro switch and controlling the micro switch to be opened and closed, the other end of the inner guide rod is an installation end, the control end and the installation end extend out of the outer side of the guide rod outer sleeve, the guide rod outer sleeve is a bakelite guide rod outer sleeve, and the inner guide rod is a bakelite inner guide rod; the driving assembly is used for driving the inner guide rod to reciprocate in the guide rod outer sleeve and comprises an installation platform, a driving disc, a linkage rod and a driving device, the driving disc is rotatably arranged on the installation platform, a connecting part is arranged on the driving disc and deviates from the rotating center of the driving disc, one end of the linkage rod is hinged to the connecting part, the other end of the linkage rod is hinged to the inner guide rod, and the driving device is in power connection with the driving disc and is used for driving the driving disc to rotate on the installation platform.
The technical scheme has the following problems: only the service state of the microswitch can be simulated, and the service life of the microswitch cannot be detected.
Disclosure of Invention
The invention aims to provide a microswitch service life detection device which can simulate the use state of a microswitch and can also detect the service life of the microswitch.
Aiming at the purposes, the invention adopts the following scheme: a microswitch life detection device comprising:
the positioning mechanism is used for positioning the microswitch to be detected;
the pressing mechanism is positioned between the driving mechanism and the positioning mechanism and is used for converting the circular motion of the driving mechanism into linear reciprocating motion so as to press the elastic sheet of the microswitch at intervals;
the detection module is used for detecting the working current change of the driving mechanism;
and the timing module is used for recording the time length T1 from the time when the pressing mechanism starts to normally press the microswitch to the time when the detection module detects that the change value of the working current of the driving mechanism exceeds the set value.
When the micro-gap switch is used, the micro-gap switch is arranged on the positioning mechanism, the stroke of the elastic sheet of the micro-gap switch reaches a specified value, then the driving mechanism is started, the pressing mechanism presses the elastic sheet of the micro-gap switch at intervals, when the current in the driving mechanism is stable, the timing module starts timing, and when the detection module detects that the change value of the working current of the driving mechanism exceeds a set value, the timing module finishes timing to obtain the time length. The service life of the microswitch can be obtained by dividing the time required by one-time pressing operation.
The interval time of the pressing operation is 5-10 s, the microswitch is given a better response time, and the longer the interval time is, the higher the accuracy of the obtained result is. When the elastic sheet of the microswitch is over-fatigue or stuck, and the service life of the microswitch is reached, the load borne by the pressing mechanism is reduced when the elastic sheet is over-fatigue, the working current of the driving mechanism is reduced, if the elastic sheet of the microswitch is stuck, the load of the pressing mechanism is increased, the working current of the driving mechanism is increased, and when the detection module detects that the working current of the driving mechanism is increased or decreased and exceeds a set value, the service life of the microswitch is judged. In the actual working process, the set value is between 0.3 and 0.5A. Because the internal working current of the driving mechanism can be greatly changed at the initial starting stage, the timing module is started to time after the internal working current of the driving mechanism is stable. The invention simulates the use state of the microswitch through the driving mechanism and the pressing mechanism, and also detects the service life of the microswitch through the detection module and the timing module.
Preferably, the method further comprises the following steps:
the control module is connected with the detection module and the timing module and used for acquiring the working current change value of the driving mechanism detected by the detection module, sending a timing instruction to the timing module and acquiring timing data of the timing module;
the standard data storage module is connected with the control module and is used for storing standard time T0 obtained by multiplying the minimum pressing times of the service life of the microswitch by the pressing time interval;
the detection result output module is connected with the control module and is used for outputting a detection result, and if T1 is greater than or equal to T0, a result that the service life of the microswitch is qualified is output; otherwise, outputting the result that the service life of the microswitch is not qualified.
The detection result output module directly gives a result of whether the service life of the microswitch is qualified or not, and the control module controls the timing module, so that the use is more convenient.
Preferably, the pressing mechanism comprises a base plate, a support is fixed on the base plate, the workbench of the driving mechanism is vertically penetrated through the output end of the driving mechanism and is located in the workbench, the pressing mechanism comprises a movable rod and a connecting rod which are hinged to each other, the connecting rod is hinged to a sliding block, the sliding block is in sliding fit with the base plate, the sliding block is connected with a contact which can do linear motion, and the movable rod is far away from the connecting rod and the hinged position of the movable rod and the output end of the driving mechanism are fixed. The circular motion of the driving mechanism is converted into linear reciprocating motion through the centering crank-slider mechanism, and the structure is simple.
Preferably, the base plate is fixed with a slide rail, and the slide block is in sliding fit with the slide rail. The slide rail makes the contact remove more stably.
Preferably, the positioning mechanism is located on the substrate and comprises a detection table, the detection table is provided with a fixing hole with an outward opening, and the fixing hole is matched with a fixing pin for fixing the microswitch. The detection platform can determine the position of the microswitch, and the debugging of the position of the microswitch before each use is avoided. The fixing hole is matched with the fabrication hole of the microswitch, and the fixing pin can pass through the fabrication hole and then is matched with the fixing hole to fix the microswitch.
Preferably, it is equipped with the penetration to examine the platform examine the bar hole of platform, the bar hole is followed contact moving direction extends, the base plate be equipped with the through hole that the bar hole corresponds, through hole screw-thread fit has the retaining member, the retaining member is located in the bar hole. Through retaining member and bar hole cooperation, it is adjustable with pressing mechanism's interval to examine test table, can adapt to the life-span detection of the micro-gap switch of different models, and the commonality is better.
Preferably, the number of the strip-shaped holes and the number of the through holes are two, and the two strip-shaped holes are arranged at intervals. After two retaining members passed the bar hole, respectively with two through hole screw-thread fit, it is more stable to examine the removal of platform, and the result of use is better.
A method for detecting the service life of a microswitch comprises the following steps:
s1, setting the product of the lowest pressing times of the service life of the microswitch and the pressing time interval as standard time T0;
s2, positioning the microswitch to be detected;
s3, pressing the elastic sheet of the microswitch to be detected at intervals by adopting a pressing mechanism driven by a driving mechanism at the time interval of the step S1, and starting timing when the current of the driving mechanism is stable until the working current change of the driving mechanism exceeds a set value, and recording the time T1;
and S4, comparing the T1 with the T0, and judging that the service life of the microswitch to be detected is qualified when the T1 is greater than or equal to the T0, or judging that the service life of the microswitch to be detected is unqualified.
Compared with the micro switch connected into a circuit, the micro switch has the advantages that whether the circuit is conducted or not and the conducting times are measured, the service life of the micro switch is measured, the requirement on the circuit is high, and the loss is large. By detecting the working current change of the driving mechanism and obtaining the time T1, the requirement on the circuit is lower and the loss is smaller when the detection service life is qualified.
The invention has the following advantages: the service state of the microswitch can be simulated, and the service life of the microswitch can be detected; thereby detect the interval between contact and micro-gap switch's shell fragment, adapt to different micro-gap switch's life and detect, the commonality is better.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a cross-sectional view of the present invention;
fig. 4 is a side view of the present invention.
Detailed Description
To further illustrate the technical solutions adopted by the present invention to achieve the predetermined objects, the above technical solutions are described in detail below with reference to the accompanying drawings, wherein:
as shown in fig. 1, a microswitch life detection device includes:
the positioning mechanism 1 is used for positioning the microswitch 6 to be detected;
the pressing mechanism 3 is positioned between the driving mechanism 2 and the microswitch 6 of the positioning mechanism 1, and the pressing mechanism 3 is used for converting the circular motion of the driving mechanism 2 into linear reciprocating motion so as to press the elastic sheet 61 of the microswitch 6 at intervals;
and the driving mechanism 2 consists of a motor and a reduction gearbox.
The detection module is used for detecting the working current change of the driving mechanism 2;
and the timing module is used for recording the time length T1 from the time when the pressing mechanism starts to normally press the microswitch to the time when the detection module detects that the change value of the working current of the driving mechanism 2 exceeds the set value of 0.3A.
The control module is connected with the detection module and the timing module and is used for acquiring the working current change value of the driving mechanism 2 detected by the detection module, sending a timing instruction to the timing module and acquiring timing data of the timing module; when the driving mechanism 2 is started for a period of time, the detection module detects that the working current of the driving mechanism 2 is stable, the control module sends a timing signal to the timing module, the timing module starts timing, and when the detection module detects that the working current change of the driving mechanism 2 exceeds a set value of 0.3A, the control module sends a timing stop signal to the timing module;
the standard data storage module is connected with the control module and is used for storing standard time T0 obtained by multiplying the minimum pressing times of the service life of the microswitch by the pressing time interval;
the detection result output module is connected with the control module and is used for outputting a detection result, and if T1 is greater than or equal to T0, a result that the service life of the microswitch is qualified is output; otherwise, outputting the result that the service life of the microswitch is not qualified.
As shown in fig. 2, the invention is provided with a base plate 4, a workbench 5 supporting a driving mechanism 2 is fixed on the base plate 4, an output end of the driving mechanism 2 vertically penetrates through the workbench 5 and is positioned in the workbench 5, a pressing mechanism 3 comprises a movable rod 31 and a connecting rod 32 which are hinged with each other, the connecting rod 32 is hinged with a sliding block 33, the sliding block 33 is matched with a sliding rail 35 in a sliding way, the sliding rail 35 is fixed with the base plate 4, the sliding block 33 is connected with a contact 34 capable of making linear motion, and the movable rod 31 is fixed with the output end of the driving mechanism 2 far away from the hinged part of the connecting rod 32 and the movable rod 31.
As shown in fig. 2 to 3, the positioning mechanism 1 is located on the substrate 4, the positioning mechanism 1 includes a detection table 11, the detection table 11 is provided with a fixing hole 12 which opens outward, and the fixing hole 12 is fitted with a fixing pin 13 for fixing the micro switch 6. The detection platform 11 is provided with a strip-shaped hole 14 penetrating through the detection platform 11, the strip-shaped hole 14 extends along the moving direction of the contact 34, the base plate 4 is provided with a through hole 41 corresponding to the strip-shaped hole 14, the through hole 41 is in threaded fit with a locking piece 15, and the locking piece 15 is positioned in the strip-shaped hole 14. Two strip-shaped holes 14 and two through holes 41 are respectively arranged, and the two strip-shaped holes 14 are arranged at intervals.
As shown in fig. 4, when in use, the method comprises the following steps:
s1, setting the product of the minimum pressing times of the service life of the microswitch being 10000 times and the pressing time interval 10S as the standard time 105s, about 27.8 h;
s2, positioning the microswitch to be detected;
s3, pressing the elastic sheet of the microswitch to be detected at intervals by adopting the pressing mechanism driven by the driving mechanism at the time interval of the step S1, and starting timing when the current of the driving mechanism is stable until the working current of the driving mechanism changes and exceeds 0.3A, and recording the time T1;
s4, comparing the T1 with the T358.8 h, judging that the service life of the microswitch to be detected is qualified when the T1 is larger than or equal to 27.8h, and otherwise judging that the service life of the microswitch to be detected is unqualified.
The time from the start of the driving mechanism to the stabilization of the internal working current of the driving mechanism is about 10 minutes, and the micro switch is touched for 60 times at most, which is negligible relative to the actual service life of the common micro switch. In order to avoid the misjudgment of the detection module, the following operations can be carried out: install micro-gap switch on examining test table, then start actuating mechanism, the contact does not contact with micro-gap switch's shell fragment, when detecting module detects actuating mechanism internal work electric current steady, it removes to suitable position to examine test table, make micro-gap switch's shell fragment's stroke reach the fixed value, then it is fixed with the base plate to examine test table through the bolt, detecting module detects actuating mechanism internal work electric current change and exceeds 0.3A this moment, control module sends timing signal to timing module, until detecting module detects actuating mechanism internal current change and exceeds 0.3A for the second time, control module sends the customization timing signal to timing module, timing module record detecting module detects actuating mechanism internal work electric current change and exceeds time length T1 of 0.3A.
Although the present invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A microswitch life detection device characterized by comprising:
the positioning mechanism (1) is used for positioning the microswitch (6) to be detected;
the pressing mechanism (3) is positioned between the driving mechanism (2) and the positioning mechanism (1), and the pressing mechanism (3) is used for converting the circular motion of the driving mechanism (2) into linear reciprocating motion so as to press the elastic sheet (61) of the microswitch (6) at intervals;
the detection module is used for detecting the working current change of the driving mechanism (2);
and the timing module is used for recording the time length T1 from the time when the pressing mechanism starts to normally press the microswitch to the time when the detection module detects that the change value of the working current of the driving mechanism (2) exceeds the set value.
2. The microswitch lifetime detection device according to claim 1, further comprising:
the control module is connected with the detection module and the timing module and used for acquiring the working current change value of the driving mechanism (2) detected by the detection module, sending a timing instruction to the timing module and acquiring timing data of the timing module;
the standard data storage module is connected with the control module and is used for storing standard time T0 obtained by multiplying the minimum pressing times of the service life of the microswitch by the pressing time interval;
the detection result output module is connected with the control module and is used for outputting a detection result, and if T1 is greater than or equal to T0, a result that the service life of the microswitch (6) is qualified is output; otherwise, outputting the result that the service life of the microswitch (6) is not qualified.
3. The microswitch service life detection device according to claim 1, comprising a substrate (4), wherein a workbench (5) supporting the driving mechanism (2) is fixed on the substrate (4), an output end of the driving mechanism (2) vertically penetrates through the workbench (5) and is positioned in the workbench (5), the pressing mechanism (3) comprises a movable rod (31) and a connecting rod (32) which are hinged to each other, the connecting rod (32) is hinged to a sliding block (33), the sliding block (33) is matched with the substrate (4) in a sliding manner, the sliding block (33) is connected with a contact (34) capable of moving linearly, and the movable rod (31) is far away from the hinged position of the connecting rod (32) and the movable rod (31) and is fixed with the output end of the driving mechanism (2).
4. The microswitch lifetime detection device according to claim 3, wherein a slide rail (35) is fixed to the base plate (4), and the slider (34) is slidably engaged with the slide rail (35).
5. The microswitch lifetime detection device according to claim 3, characterized in that the positioning mechanism (1) is located on the base plate (4), the positioning mechanism (1) comprises a detection table (11), the detection table (11) is provided with a fixing hole (12) which opens outwards, and the fixing hole (12) is fitted with a fixing pin (13) for fixing the microswitch (6).
6. The microswitch life detection device according to claim 5, wherein the detection table (11) is provided with a strip-shaped hole (14) penetrating through the detection table (11), the strip-shaped hole (14) extends along the moving direction of the contact (34), the base plate (4) is provided with a through hole (41) corresponding to the strip-shaped hole (14), the through hole (41) is in threaded fit with a locking member (15), and the locking member (15) is located in the strip-shaped hole (14).
7. The microswitch lifetime detecting device according to claim 6, wherein there are two strip-shaped holes (14) and two through holes (41), and the two strip-shaped holes (14) are arranged at intervals.
8. A method for detecting the service life of a microswitch is characterized by comprising the following steps:
s1, setting the product of the lowest pressing times of the service life of the microswitch and the pressing time interval as standard time T0;
s2, positioning the microswitch to be detected;
s3, pressing the elastic sheet of the microswitch to be detected at intervals by adopting a pressing mechanism driven by a driving mechanism at the time interval of the step S1, and starting timing when the current of the driving mechanism is stable until the working current change of the driving mechanism exceeds a set value, and recording the time T1;
and S4, comparing the T1 with the T0, and judging that the service life of the microswitch to be detected is qualified when the T1 is greater than or equal to the T0, or judging that the service life of the microswitch to be detected is unqualified.
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| CN202110752414.XA CN113447807A (en) | 2021-07-02 | 2021-07-02 | Microswitch service life detection device and detection method |
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| CN202110752414.XA CN113447807A (en) | 2021-07-02 | 2021-07-02 | Microswitch service life detection device and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115291098A (en) * | 2022-08-10 | 2022-11-04 | 哈尔滨工业大学 | Microswitch electric service life experiment system and method |
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Application publication date: 20210928 |