Reliability detection device for electrical connector
Technical Field
The invention relates to an electric connector reliability detection device which detects the needle shrinkage phenomenon of an electric connector by comparing holding force and has universality for detecting the reliability of male and female plugs of various models.
Background
With the development of the Chinese rail transit, the electric connector is more and more widely applied to motor train units, high-speed rails and subways. The contact pin shrinkage phenomenon caused by poor contact, poor insulation, poor locking mechanism and other reasons of the electric connector contact pin directly causes poor communication of the locomotive, and even threatens the personal safety of passengers.
The conventional reliability detection methods for the electrical connector mainly comprise four methods: contact resistance detection, holding power detection, nondestructive detection and instantaneous interruption detection. The contact resistance detection mainly adopts a contact resistance detector and is influenced by factors such as contact piece materials, positive pressure, surface state and the like; the nondestructive detection mainly takes a physical or chemical method as a means, and detects the interior of the electrical connector by means of modern technology and equipment on the premise of not damaging the service performance and the internal tissue of a detected object; the instantaneous interruption detection mainly adopts the instantaneous interruption detector to judge the contact resistance value of the plug-in unit, and simultaneously needs to judge the instantaneous interruption time. The three detection methods have high cost and complex detection process. The retention force detection is currently common single-needle detection, the efficiency is low, and a mature high-detection-efficiency electric connector needle retracting reliability detection device does not appear on the market.
Disclosure of Invention
The invention aims to solve the technical problem of providing the device for detecting the reliability of the electrical connector aiming at the defects in the prior art, which judges whether the electrical connector has the needle retracting phenomenon or not by detecting the retention force of the male and female plugs in an assembly workshop, solves the problem that a plurality of detection devices are needed for detecting the needle retracting reliability of the male and female plugs with different models, avoids loading defective products and radically ensures the reliability of products.
The technical scheme of the invention is as follows:
the reliability detection device for the electrical connector comprises a load loading device (1) for applying rated pressure on a plug to be detected, a male and female detection front end (2) for signal acquisition and transmission and a detection base (3), wherein the load loading device (1) and the male and female detection front end (2) are connected with each other and are arranged on the detection base (3);
the detection front end (2) comprises a plug fitting sleeve (21) to be detected, a detection unit mounting sleeve (22), a detection unit (23), a detection unit mounting plate (24), a detection circuit board (25) and a communication circuit board (26), wherein the plug fitting sleeve (21) to be detected is of a rectangular frame structure, a detection unit mounting sleeve (22) can be accommodated and fixed in an internal cavity of the plug fitting sleeve (21), the detection unit mounting sleeve (22) is of a rectangular frame structure, a plurality of detection units (23) can be accommodated and detachably mounted in the internal cavity of the detection unit mounting sleeve and can be fixed in parallel, and the detection unit mounting sleeve (22) is provided with a detection unit mounting sleeve mounting hole (221), a detection unit mounting hole (222) and; the detection unit mounting sleeve mounting holes (221) are used for fixing the detection unit mounting sleeve on the plug fitting sleeve (21) to be detected, and after the detection units (23) are inserted into the inner cavity of the detection unit mounting sleeve (22), the detection units (23) are independently fixed one by one through the detection unit mounting plates (24) and the corresponding detection unit mounting holes (222); the detection unit assembling step (223) is arranged inside the detection unit mounting sleeve (22), and after the detection units (23) are inserted into the inner cavity of the detection unit mounting sleeve (22), the detection units (23) are limited and fixed through the detection unit assembling step 223.
According to the reliability detection device for the electrical connector, a detection unit (23) comprises a detector plug tool, a clamping ring (232), a sensor (233), a cushion block (236), a guide plate (237), a rubber pad (238) and a cushion plate (239); the detector plug tool comprises a male pin detector plug tool (231) and a female pin detector plug tool (234); the male pin detector plug tool (231) comprises jacks corresponding to the number and the positions of male pin inserting needles to be detected, and male pin detection thimbles (240) are accommodated in the jacks; the female pin detector plug tool (234) comprises female pin detection thimbles (235) corresponding to the number and the positions of female pin jacks to be detected; the guide plate (237) is provided with jacks corresponding to the number and the positions of the pins/holes of the male/female plug to be detected.
The reliability detection device for the electric connector is characterized in that a cylindrical cushion block (236) is arranged in a jack of a guide plate (237), a plurality of sensing areas corresponding to the number and the positions of pins/holes of a male/female plug to be detected are arranged on a sensor (233), the sensing areas are opposite to the jack of the guide plate (237), a rubber pad (238) is arranged between the guide plate (237) and the sensing area of the sensor (233) and between the sensing area of the sensor (233) and a cushion plate (239) for transferring action force, so that load can be uniformly loaded to the sensing area of the sensor, after a male pin detector plug fixture (231) or a female pin detector plug fixture (234) and the cushion block (236), the rubber pad (238), the guide plate (237) and the cushion plate (239) are installed, the snap ring (232) is inserted, one plane of the snap ring (232) is pressed on the cushion plate (239), a bayonet of the snap ring (232) is matched with a bulge arranged on the male pin detector plug fixture (, the positions of a male pin detector plug tool (231), a cushion block (236), a rubber pad (238), a guide plate (237) and a cushion plate (239) are fixed.
According to the reliability detection device for the electric connector, the sensor (233) is an array sensor, and a sensing area corresponding to a jack or a contact pin contained in the detection unit is arrayed on the sensor.
The reliability detection device for the electrical connector comprises a load loading device (1) and is characterized in that the load loading device comprises an electric push rod (11), a limiting support (12), a microswitch (13), a synchronous beam (14), an electronic ruler (15), a pull rod (16) and a force application claw (17), one end of the pull rod (16) is in bolt connection with the synchronous beam (14), the middle of the pull rod (16) penetrates through a slide rail (32), the other end of the pull rod is positioned through a pin shaft with the force application claw (17), the pull rod is fastened through a bolt, the electric push rod (11) drives the synchronous beam (14) and the pull rod (16) to move, the slide rail (32) plays a guiding role in controlling the pull rod (16), and the synchronous beam (14) ensures that the left pull rod and the.
Electronic ruler (15) and micro-gap switch (13) are installed on synchronization roof beam (14) upper portion to electric connector reliability detection device, electronic ruler (15) are used for detecting the displacement of synchronization roof beam (14), control load size through the control to this displacement, and after micro-gap switch (13) touched spacing support 12, electric putter (11) stop motion played safety protection's effect.
According to the reliability detection device of the electrical connector, a force application claw (17) is detachably connected with a pull rod (16), a positioning pin shaft (171) is arranged inside the force application claw (17), a positioning pin hole (161) which corresponds to the positioning pin shaft (171) in position is machined at one end of the pull rod (16), and the force application claw (17) and the pull rod (16) are preliminarily installed and positioned through the matching of the positioning pin shaft (171) and the positioning pin hole (161); three bolt through holes (172) are processed at the upper part of the force application claw (17), corresponding three bolt through holes are processed at the upper part of one end of the pull rod, and the pull rod (16) and the force application claw (17) are screwed up through the three bolt holes.
The reliability detection device of the electric connector is characterized in that corresponding force application claws are replaced aiming at different plugs to be detected: a first interchangeable force applying claw (173) or a second interchangeable force applying claw (174) for applying a uniform force to different plugs to be tested.
The reliability detection device for the electric connector is characterized in that a synchronous beam (14) is formed by welding an upper trapezoidal panel and a lower trapezoidal panel with rectangular panels, two rectangular rib plates (145) are symmetrically welded between the upper trapezoidal panel and the lower trapezoidal panel, pin holes (142) are formed in the upper trapezoidal panel and the lower trapezoidal panel and are connected with a telescopic rod pin shaft of an electric push rod (11), unthreaded holes (141), unthreaded holes (143) and unthreaded holes (144) are symmetrically formed in the outer side of each rectangular panel, a microswitch (13) is fixed to one side of the trapezoidal panel on the synchronous beam through the unthreaded holes (141), an electronic ruler (15) is fixed to the other side of the trapezoidal panel on the synchronous beam through the unthreaded holes (143), and the unthreaded holes (144) are in clearance fit with a pull rod (.
The reliability detection device for the electrical connector comprises a detection base (3) and a detection device, wherein the detection base (3) comprises a base (31), an I-shaped support frame (33), a slide rail (32), a motor support frame (34), a circuit board support frame (35) and an electric push rod telescopic rod support frame (36), the base (31) comprises a horizontal panel and a base front panel, the horizontal panel and the base front panel are reinforced through a base front panel reinforcing rib 318, two pull rod assembly holes 314 are formed in the base front panel, and a pull rod 16 penetrates through the two pull rod assembly holes 314; the I-shaped support frame structure 33 is fixedly provided with a slide rail (32), the slide rail mounting hole (331) is used for fixing the slide rail (32), and the slide rail is fixed on the base 31 through an I-shaped beam mounting counter bore (332).
By adopting the scheme, the invention has the following beneficial effects:
1. the male and female plugs of the electrical connector can share one set of force application mechanism and one set of test mechanism, and the reliability of the contact pin can be tested only by replacing different detection front ends; the device designed by the invention can detect whether the plurality of needles have needle retraction in batch, and the same set of device can detect the needle retraction of the male and female contact pins.
2. The detachable connection design of application of force claw can change corresponding application of force claw to waiting to detect the plug to the difference to wait to detect the plug and carry out even application of force to the difference.
3. The detection unit mounting sleeve is of a rectangular frame structure, the inner cavity of the detection unit mounting sleeve is used for accommodating and detachably mounting and fixing a plurality of detection units in parallel, and the structure can be used for dismounting a single detection unit and is beneficial to maintenance and repair of the device.
4. After the male/female head to be detected is inserted into the jack of the male/female pin detector plug tool, the detection thimble transmits the acting force to the sensor induction area under the guiding action of the guide plate, and the stress of the sensor induction area is uniform.
Drawings
FIG. 1 is a schematic perspective view of a detection device
FIG. 2 load applying apparatus assembly drawing
FIG. 3 force applying pawl Assembly
Fig. 4 structure diagram of interchangeable jaw 1
Fig. 5 structure view of interchangeable jaw 2
FIG. 6 is an assembly drawing of a front end structure for inspection
FIG. 7 is a schematic view of the front end face structure of the male pin detector
FIG. 8 is a schematic view of the front end face structure of the female pin detector
FIG. 9 inspection unit mounting sleeve detail drawing
FIG. 10 is a schematic view of a male pin detecting unit
FIG. 11 is a schematic view of a structure of a female needle detecting unit
FIG. 12 inspection base assembly drawing
FIG. 13 is a detail view of an I-shaped support
Figure 14 base part drawing
FIG. 15 is a drawing of a trapezoidal shaped timing beam
FIG. 16 is an assembly view of the male pin detecting unit
FIG. 17 is a schematic view of an array sensor;
1. a load loading device;
11. an electric push rod;
12. a limiting bracket;
13. a microswitch;
14. a synchronization beam; 141. a microswitch assembly hole; 142. a pin hole; 143. an electronic ruler assembly hole; 144. the synchronous beam and the pull rod mounting hole; 145. reinforcing ribs of the synchronization beam;
15. an electronic ruler;
16. a pull rod; 161. a positioning pin hole; 162. a tie rod bolt through hole; 163. adjusting the screw thread;
17. a force application claw; 171. positioning a pin shaft; 172. a force application claw bolt through hole; 173. a first interchangeable force applying pawl; 174. a second interchangeable force applying pawl;
18. adjusting the stud;
19. a bracket for the fixed end of the electronic ruler;
110. an electronic ruler mounting plate;
2. detecting a front end;
21. the plug to be tested is matched with the socket;
22. a detection unit mounting sleeve; 221. a detection unit mounting sleeve mounting hole; 222. a detection unit mounting hole; 223. assembling steps on the detection unit;
23. a detection unit; 231. a male pin detector plug tool; 232. a snap ring; 233. a sensor; 234. a female pin detector plug tool; 235. detecting a thimble by a female needle; 236. cushion blocks; 237. a guide plate; 238. a rubber pad; 239. a base plate; 240 male pin detection thimbles;
24. a detection unit mounting plate;
25. detecting the circuit board;
26. a communication circuit board;
3. detecting a base;
31. a base; 311. a base assembly hole; 312. i-shaped support frame mounting holes; 313. a detector assembly aperture; 314. a pull rod assembly hole; 315. an electric push rod support frame mounting hole; 316. a pin hole is assembled behind the electric push rod; 317. the electric push rod is provided with a reinforcing rib; 318. base front panel reinforcing ribs; 319. a base reinforcing rib;
32. a slide rail;
33. an I-shaped support frame; 331. a slide rail mounting hole; 332. mounting counter bores on the I-shaped beams;
34. a motor support frame;
35. a circuit board support frame;
36. electric putter telescopic link support frame.
Detailed Description
The present invention will be described in detail with reference to specific examples.
As shown in figure 1, the reliability detection device of the electrical connector comprises a load loading device 1, a detection front end 2 and a detection base 3, the invention provides an electric force application device according to the retention force detection principle, rated pressure is applied to a plug to be detected, signal transmission is carried out through a piezoresistive sensor and a single chip microcomputer, and the detection result is displayed through an upper computer. The force application device is high in integration level and low in energy consumption, and the pin retracting phenomenon of the male plug and the female plug of the same model can be detected.
The load loading device 1 is shown in an assembly drawing as fig. 2, and comprises an electric push rod 11, a limiting bracket 12, a micro switch 13, a synchronous beam 14, an electronic ruler 15, a pull rod 16 and a force application claw 17, wherein one end of the pull rod 16 is in bolted connection with the synchronous beam 14, the middle part of the pull rod 16 penetrates through a slide rail 32, the other end of the pull rod 16 is positioned with the force application claw 17 through a pin shaft and is fastened by a bolt, the electric push rod 11 drives the synchronous beam 14 and the pull rod 16 to move, the slide rail 32 plays a guiding role on the left pull rod 16 and the right pull rod 16, and the synchronous beam 14 ensures that;
an electronic ruler 15 and a microswitch 13 are mounted on the upper portion of the synchronous beam 14, the electronic ruler 15 is used for detecting the displacement of the synchronous beam 14, the load is controlled by controlling the displacement, and after the microswitch 13 touches the limit bracket 12, the electric push rod 11 stops moving, so that the safety protection effect is achieved;
the force application claw 17 is detachably connected with the pull rod 16, the assembly sequence is shown in fig. 3, a positioning pin shaft 171 is arranged in the force application claw 17, a positioning pin hole 161 which is corresponding to the positioning pin shaft 171 in position is machined at one end of the pull rod 16, and the force application claw 17 and the pull rod 16 are preliminarily installed and positioned through the matching of the positioning pin shaft 171 and the positioning pin hole 161; three bolt through holes 172 are processed on the upper portion of the force application claw 17, corresponding three bolt through holes are processed on the upper portion of one end of the pull rod, the pull rod 16 and the force application claw 17 are screwed through the three bolt holes, and through the detachable connection design, corresponding force application claws, such as a first interchangeable force application claw 173 and a second interchangeable force application claw 174, can be replaced aiming at different plugs to be detected so as to uniformly apply force to the different plugs to be detected.
As shown in fig. 6-9, the detection front end 2 includes a plug fitting sleeve 21 to be detected, a detection unit mounting sleeve 22, a detection unit 23, a detection unit mounting plate 24, a detection circuit board 25, and a communication circuit board 26, the plug fitting sleeve 21 to be detected is a rectangular frame structure, an internal cavity of the plug fitting sleeve 21 to be detected can accommodate and fix the detection unit mounting sleeve 22, the detection unit mounting sleeve 22 is a rectangular frame structure, an internal cavity of the detection unit mounting sleeve accommodates and detachably mounts and fixes a plurality of detection units 23 in parallel, and the detection unit mounting sleeve 22 is provided with a detection unit mounting sleeve mounting hole 221, a detection unit mounting hole 222, and a detection unit assembling step 223; the detection unit mounting sleeve mounting holes 221 are used for fixing the detection unit mounting sleeve on the plug fitting sleeve 21 to be detected, and after the detection units 23 are inserted into the inner cavity of the detection unit mounting sleeve 22, the detection units 23 are independently fixed one by one through the detection unit mounting plates 24 and the corresponding detection unit mounting holes 222; detection unit assembly step 223 sets up inside detection unit installation cover 22, and a plurality of detection unit 23 insert the inside cavity of detection unit installation cover 22 after, carry out spacing fixed to a plurality of detection unit 23 through detection unit assembly step 223, and this kind of structure can be dismantled single detection unit, is favorable to the maintenance and the maintenance of device. The detecting unit 23 is detachably connected to the detecting unit attaching cover 22 via the detecting unit attaching plate 24. As shown in fig. 7, 8, 10, 11, 16, and 17, the detecting unit 23 includes a detector plug fixture, a snap ring 232, a sensor 233, a pad 236, a guide plate 237, a rubber pad 238, and a pad 239; the detector plug tooling comprises a male pin detector plug tooling 231 and a female pin detector plug tooling 234;
the front end structural diagram of the male pin detector plug tool 231 is shown in fig. 10, and includes jacks corresponding to the number and the position of male pin pins to be detected, the male pin detection thimble 240 is accommodated in the jack, and the guide plate 237 is provided with the jacks corresponding to the number and the position of the male pin pins to be detected; as shown in the assembly drawing of the male pin detection unit shown in fig. 16, a cylindrical cushion block 236 is arranged in a jack of a guide plate 237, a sensor 233 is provided with a plurality of sensing areas corresponding to the number and the positions of male pin pins to be detected, the plurality of sensing areas are aligned to the jack of the guide plate 237, a rubber pad 238 is arranged between the guide plate 237 and the sensing area of the sensor 233, and between the sensing area of the sensor 233 and a cushion plate 239, so that a load can be uniformly loaded on the sensing area of the sensor, after the male pin detector plug tool 231, the cushion block 236, the rubber pad 238, the guide plate 237 and the cushion plate 239 are installed, the snap ring 232 is inserted, one plane of the snap ring 232 is pressed against the cushion plate 239, a bayonet of the snap ring 232 is matched with a protrusion arranged on the male pin detector plug tool 231, and the positions of the male pin detector plug tool 231, the cushion block. After the male pin to be detected is inserted into the male pin detection thimble 240, the male pin detection thimble 240 moves under the action of load and props against the cushion block 236, the cushion block 236 transmits acting force to the sensor sensing area under the combined action of the guide plate 237 and the rubber pad 238, and the sensor sensing area is uniformly stressed;
a front end structure diagram of the female pin detector plug tool 234 is shown in fig. 11, and unlike the male pin detector plug tool 231, the front end structure diagram includes female pin detection thimbles 235 (12 in total) corresponding to the number and the positions of female pin jacks to be detected; after the female pin detection thimble 235 is inserted into the female head to be detected, the female pin detection thimble 235 moves under the action of load and butts against the cushion block 236, and the cushion block 236 uniformly transmits acting force to the sensor sensing area under the combined action of the guide plate 237 and the rubber pad 238.
As shown in fig. 17, the sensor 233 is an array sensor in which (12) sensing regions corresponding to (12) insertion holes or pins included in the detecting unit are arrayed (the sensing regions are circular in the portion a-a in fig. 17). In the figure, the part B-B is an outgoing line part of the sensor, and a standard FPC interface form is adopted as a signal outgoing line connector, so that sensor data can be conveniently transmitted to a detection circuit.
The assembly drawing of the detection base (3) is shown in fig. 12-14, and the detection base comprises a base 31, an i-shaped support frame 33, a slide rail 32, a motor support frame 34, a circuit board support frame 35, and an electric push rod telescopic rod support frame 36, wherein the base 31 comprises a horizontal panel and a base front panel, the horizontal panel and the base front panel are reinforced by a base front panel reinforcing rib 318, two pull rod assembly holes 314 are arranged on the base front panel, and the pull rod 16 passes through the two pull rod assembly holes 314.
The I-shaped support frame structure 33 is fixed with the slide rail 32, the slide rail mounting hole 331 is used for fixing the slide rail 32, and the slide rail is fixed on the base 31 through the I-shaped beam mounting counter bore 332;
the part drawing of the synchronous beam (14) is shown in fig. 15, the synchronous beam is formed by welding an upper trapezoidal panel and a lower trapezoidal panel with rectangular panels, two rectangular rib plates 145 are symmetrically welded between the upper trapezoidal panel and the lower trapezoidal panel, the upper trapezoidal panel and the lower trapezoidal panel are provided with pin holes 142 to be connected with pin shafts of telescopic rods of the electric push rods (11), the outer side of each rectangular panel is symmetrically provided with an unthreaded hole 141, an unthreaded hole 143 and an unthreaded hole 144, a microswitch 13 is fixed on one side of the trapezoidal panel on the synchronous beam through the unthreaded hole 141, an electronic ruler 15 is fixed on the other side of the trapezoidal panel on the synchronous beam through the unthreaded hole 143, and the unthreaded hole 144 is in clearance.
The electric push rod 11 drives the synchronous beam 14 to move, and the synchronous beam pushes the pull rod 16 and the force application claw 17 to extend out; and placing the electric appliance connector to be detected and matching with the detection front end. Then, the electric push rod 11 reversely drives the synchronous beam 14, retracts the pull rod 16 and the force application claw 17, and applies load to the electric connector to be detected, wherein the load is controlled by the electronic ruler. The detection result is transmitted to the upper computer and displayed by the detection circuit through the serial interface, different detection front ends and the force applying claws 17 are replaced according to requirements, detection on the electric connectors to be detected in different models and different shapes can be met, and whether the electric connectors have the needle retracting phenomenon or not is judged by detecting the retention force of the male and female plugs in an assembly workshop.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.