Needle withdrawing detection device for locomotive connector plug

By designing a needle retraction detection device for locomotive connectors, the pin thrust is detected by using a thrust, a thrust spring and a varistor plate, the problem of insufficient detection of thrust in the prior art is solved, and more efficient pin retraction detection is achieved , simplifies inspection procedures and reduces labor costs.

CN222232649UActive Publication Date: 2024-12-24TIANJIN LOCOMOTIVE CO LTD
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Patent Information

Application Number
CN202323473293.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-20
Publication Date
2024-12-24
Estimated Expiration
2033-12-20

AI Technical Summary

Technical Problem

The prior art cannot effectively detect whether the pin of the locomotive connector has a retraction needle, especially when the prosecutors have insufficient thrust, which leads to the inability to effectively detect the problem of poor connection.

Method used

A needle-removing detection device including a handheld body, a connecting seat, a detection mechanism and a detection module is designed. The detection unit consisting of a thrust, a thrust spring and a pressure block is used to detect the thrust force in real time using a varistor plate and a control circuit board, and The detection result is feedback through the indicator light to ensure that the detection thrust reaches the preset value.

Benefits of technology

The device can facilitate the detector to intuitively control the detection thrust, improve the effectiveness of pin retardation detection, simplify the inspection process, save time and labor costs, and enhance the function of the connector pin reduction check tool.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a locomotive connector plug needle withdrawing detection device, which comprises a hand-held body, a connecting seat, a detection mechanism and a detection module, the connecting seat comprises a base and a positioning cylinder, the inner circumferential surface of the positioning cylinder is provided with a plurality of slots, the detection mechanism comprises a thimble, a thimble seat, a thrust spring and a pressure block, the thimble seat is arranged in the positioning cylinder, and the thrust spring is arranged in the positioning cylinder. One end of the ejector pin seat is provided with a pin hole, the ejector pin and the pressure block are respectively connected with two ends of the thrust spring in a pressing contact manner, the detection module comprises a control circuit board, a pressure-sensitive resistance plate and a detection indicating lamp, the pressure-sensitive resistance plate is arranged on the ejector pin seat and is connected with the other end of the pressure block in a supporting manner, and a plurality of circular film pressure-sensitive resistors are serially connected onto the pressure-sensitive resistance plate; the thin film piezoresistor and the other end of the pressure block are always in a pressure contact state; according to the needle withdrawing detection device, through the detection mechanism and the detection module arranged in the needle withdrawing detection device, the detection thrust is fed back and judged to indicate the action condition of the detection thrust, detection personnel can conveniently and visually control the detection thrust, and the effectiveness of needle withdrawing detection is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of connector inspection tools, in particular to a needle withdrawal detection device for a locomotive connector plug. Background Art

[0002] The connectors of the HXD3 locomotive micro-cabinet and control electrical cabinet mainly use 27-core connectors. During the C6-level maintenance and operation of the locomotive, the connectors are subject to pin withdrawal and shrinkage. The withdrawal of connectors can cause locomotive operation failures, and in severe cases, can cause the locomotive to be damaged or even cause a fire. In order to avoid such accidents, the production process of the C6-level repair cable is inspected by visual inspection or a single-needle withdrawal tool; the withdrawal detection devices of the prior art all apply force by pushing the pins through the ejector pins. If the pins are withdrawn and shrunk, it can be found through visual observation; the technical problem that the withdrawal detection devices of the prior art have not solved is: how to ensure the ejector pin force. When the inspector's thrust is insufficient, the ejector pin force will be insufficient, and the pins with poor connections cannot be effectively checked. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a needle withdrawal detection device for a motorcycle connector plug to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A needle withdrawal detection device for a locomotive connector plug comprises a handheld body, a connecting seat, a detection mechanism and a detection module. The connecting seat comprises a base and a positioning cylinder. A plurality of slots matching the plug strips on the connector plug are axially arranged on the inner circumference of the positioning cylinder. The base is connected to the handheld body. The detection mechanism comprises an ejector pin, an ejector pin seat, a thrust spring and a pressure block. The number of ejector pins, thrust springs and pressure blocks corresponds to the number of pins on the connector plug. The ejector pin seat is arranged in the positioning cylinder, and a plurality of pinholes are opened at one end of the ejector pin seat. The thrust spring is arranged in the pinhole. The ejector pin and the pressure block are coaxially arranged and respectively contact the two ends of the thrust spring. The positioning end of the ejector pin is inserted into the pinhole and guided by the pinhole to slide. One end of the pressure block is inserted into the pinhole. The detection module includes a control circuit board, and a varistor board and a detection indicator light electrically connected to the control circuit board. The varistor board is arranged on the ejector seat, and its support is connected to the other end of the pressure block. Several circular thin film varistors are arranged in series on the varistor board. The thin film varistor and the other end of the pressure block always maintain a pressure-contact connection state, which is used to detect the ejector thrust and feed back to the control circuit board. The detection indicator light is arranged on the outer peripheral surface of the handheld body, which is used to indicate when the ejector force reaches a preset pressure.

[0006] Preferably, the ejector seat can slide in the positioning cylinder, and is provided with several sliding strips adapted to the slots, a driving head is provided at the other end of the ejector seat, a hollow hole is provided in the handheld body, a driving thread is provided at one end of the hollow hole, the driving head is inserted into the hollow hole and connected through the driving thread, and one end of the handheld body is rotatably connected to the connecting seat.

[0007] More preferably, a charging interface is provided at the other end of the handheld body, a battery is provided in the hollow hole, the battery and the charging interface are electrically connected, and the battery supplies power to the control circuit board.

[0008] Further preferably, an illuminating lamp is arranged on the outer peripheral surface of the base, and an illuminating switch is arranged on the outer peripheral surface of the handheld body, and the illuminating lamp and the illuminating switch are connected in series with the battery.

[0009] Further preferably, a dust cover is provided on the positioning tube to seal the tube opening of the positioning tube.

[0010] Compared with the prior art, the needle withdrawal detection device of a locomotive connector plug of the utility model has the following beneficial effects:

[0011] The pin withdrawal detection device is docked and positioned with the connector plug through a connecting socket, so that the ejector pin and the insertion pin correspond one to one. During the manual application of the detection thrust, the correct application direction of the detection thrust is always maintained. Through its built-in detection mechanism and detection module, the detection thrust is fed back and judgment is made to indicate the effect of the detection thrust, which makes it easy for the detection personnel to intuitively control the detection thrust and improve the effectiveness of the pin withdrawal detection. At the same time, by adding digital detection means, the connector socket pin reduction inspection process is simplified, saving operation time and labor costs, and filling the gap of connector pin reduction troubleshooting tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of the needle withdrawal detection device of the utility model;

[0013] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the needle withdrawal detection device with the dust cover opened;

[0014] Figure 3 It is a schematic cross-sectional structure diagram of the needle withdrawal detection device of the utility model;

[0015] Figure 4 for Figure 3 Schematic diagram of the structure of the medium varistor board.

[0016] In the figure: 1. Handheld body; 11. Charging interface; 12. Lighting switch; 13. Detection indicator light; 14. Battery; 15. Control circuit board; 16. Driving thread; 2. Connecting seat; 21. Lighting lamp; 22. Base; 23. Positioning cylinder; 24. Slot; 3. Dust cover; 4. Detection mechanism; 41. Ejector pin; 42. Ejector pin seat; 43. Varistor plate; 44. Driving head; 45. Pressure block; 46. Thrust spring. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only the best embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] This embodiment provides a locomotive connector plug pin withdrawal detection device, which can be used to detect the pin tightening state of the HXD3 type locomotive circular connector plug, such as Figure 1-3As shown, it includes a handheld body, a connecting seat 2, a detection mechanism 4 and a detection module. The connecting seat 2 is used to connect with the connector plug to locate the position of the ejector pin 41. It includes a base 22 and a positioning cylinder 23. The inner circumference of the positioning cylinder 23 is axially provided with a plurality of slots 24 adapted to the plug strips on the connector plug. Before the detection, the positioning cylinder 23 is inserted into the connector plug in the correct orientation. The slots 24 cooperate with the plug strips to maintain the sliding direction of the connecting seat 2. The base 22 is connected to the handheld body, and the handheld body is convenient for hand-held application of detection thrust. During or after the plugging process, the detection mechanism 4 can be applied on each pin. The detection mechanism 4 includes an ejector pin 41, an ejector pin seat 42, a thrust spring 46 and a pressure block 45. The ejector pin seat 42 is arranged in the positioning cylinder 23, which is used to install and support the ejector pin 41. The bottom of the ejector pin 41 is provided with a mounting cavity for installing the varistor plate 43. The ejector pin 41, the thrust spring 46 and the pressure block 45 form a group of pin detection units. The number of the pin detection units corresponds to the number of pins on the connector plug. After being positioned by the slot 24 and the insertion strip, the positions of the two are also corresponding. A plurality of pinholes are opened at one end of the ejector pin seat 42 for installing and guiding the pin detection unit. The thrust spring 46 is provided at the bottom of the positioning cylinder 23. 6 is located in the pinhole, and the ejector pin 41 and the pressure block 45 are respectively connected with the two ends of the thrust spring 46 by pressure contact, so as to support the ejector pin 41. The ejector pin 41 is solid and can be made of stainless steel and copper alloy. The positioning end of the ejector pin 41 is inserted into the pinhole and limited by the step surface at the end of the pinhole. The ejector pin 41 can slide guided by the pinhole. The thrust spring 46 enables the pressure block 45 to proportionally feedback the detection thrust of the ejector pin 41. One end of the pressure block 45 is inserted into the pinhole, and the other end is always connected with the piezoresistive plate 43 of the detection module by pressure contact. By detecting the change of the thrust, the resistance value of the piezoresistive plate 43 will change, and the detection The module determines the resistance value of the varistor plate 43, specifically including the control circuit board 15, and the varistor plate 43 and the detection indicator light 13 electrically connected to the control circuit board 15. The varistor plate 43 is arranged at the bottom of the installation cavity of the ejector seat 42, and a number of thin film varistors corresponding to the number and position of the pressure block 45 are embedded on its detection surface to fit the other end of the supporting pressure block 45, and the pressure is fed back in real time through the change of resistance value proportional to the pressure. The thin film varistor is a circular sheet structure, which is arranged on the varistor plate 43 by series connection and connected to the control circuit board 15, such as Figure 4As shown, under the action of the thrust spring 46, the thin film varistor and the other end of the pressure block 45 always maintain a pressure-contact connection state, which can detect the thrust of the ejector pin 41 and feed back to the control circuit board 15. The control circuit board 15 has a digital-to-analog conversion module and a timing function. It is connected to the detection indicator light 13 to drive it to flash. The sampling period is 100ms. If the voltage value is less than the preset value, the red light will be on. Under continuous pressure, the indicator light will flash red. When applying the detection thrust, you should pay attention to proceed slowly. When the detection thrust reaches or exceeds 30N, the voltage value is equal to or greater than the preset value, and the indicator light flashes green. At this time, keep it for 3s, and then the needle withdrawal detection device can be removed to visually inspect the needle withdrawal situation.

[0019] As a further technical solution, since the control of applying the detection thrust by hand is realized by manpower, it is often easy to operate too hastily during operation, and the control circuit board 15 cannot collect, analyze and feedback the pressure signal in time. At the same time, too fast operation will also reduce the service life of the thrust spring 46. Therefore, this embodiment adopts a rotary propulsion implementation method to detect the application of thrust. Figure 3 The ejector seat 42 can slide in the positioning cylinder 23 under the guidance of the slide bar matched with the slot 24 thereon, and the other end of the ejector seat 42 is provided with a driving head 44, and the driving head 44 is connected to the hollow hole of the handheld body by a driving thread 16, and one end of the handheld body is rotatably connected to the connecting seat 2. Therefore, by rotating the handheld body, the driving thread 16 drives the ejector seat 42 to slide along the positioning cylinder 23 and slowly advance, so as to achieve the purpose of slowly applying the detection thrust. This embodiment also provides an empirical operation for applying the detection thrust, that is, the number of rotations required for the ejector seat 42 to reach the standard detection thrust when it is pushed from the initial position by experience. Combined with the detection indicator light 13, it can be judged whether there is a needle shrinkage phenomenon. After reaching the number of rotations, if there is no needle shrinkage phenomenon, the detection thrust should reach the standard value. At this time, the detection indicator light 13 should flash green. If it flashes red, it means that the needle is shrunk, so that the detection thrust is still less than the standard value. This empirical judgment method requires that the ejector seat 42 be restored to the initial position before each operation, that is, the ejector seat 42 is pushed to the bottom position of the slot 24.

[0020] As a further technical solution, in order to improve the operability of the detection device and adapt it to mobile operations and operations in dark environments, a rechargeable battery 14 and a lighting lamp 21 are provided on the handheld body, wherein a charging interface 11 is provided at the other end of the handheld body, and the charging interface 11 is configured with a corresponding charging circuit. The charging circuit has a buzzer, which automatically buzzes when the power is lower than 20%. The 5V voltage is connected to the charging interface 11 for charging. The lighting lamp 21 lamp beads use focusing LED lamp beads less than 5V. The battery 14 is arranged in the hollow hole and connected to the charging circuit of the charging interface 11. The battery 14 is connected to the control circuit board 15 and the lighting lamp 21 for power supply. The lighting lamp 21 is protruded on the outer peripheral surface of the base 22 to facilitate the detection of the withdrawal of the pin in a dark environment. A lighting switch 12 is provided on the outer peripheral surface of the handheld body.

[0021] As a further technical solution, a dust cover 3 is sleeved on the positioning tube 23 to cover the tube opening of the positioning tube 23 .

[0022] The directional words and distance descriptions such as "upper", "lower", "side", and "end" mentioned in this article are based on Figure 1-Figure 3 The orientation relationship or coordinate relationship shown in . These terms are mainly used to better describe the utility model and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation;

[0023] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the terms "on" and "inside" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A needle withdrawal detection device for a motorcycle connector plug, characterized in that: The invention comprises a handheld body, a connecting seat, a detection mechanism and a detection module, wherein the connecting seat comprises a base and a positioning cylinder, and the inner circumferential surface of the positioning cylinder is provided with a plurality of slots which are matched with the plug strips on the connector plug in the axial direction, and the base is connected to the handheld body, and the detection mechanism comprises an ejector pin, an ejector pin seat, a thrust spring and a pressure block, and the number of the ejector pins, the thrust spring and the pressure block corresponds to the number of the pins on the connector plug, the ejector pin seat is arranged in the positioning cylinder, and a plurality of pinholes are opened at one end of the ejector pin seat, and the thrust spring is arranged in the pinhole, the ejector pin and the pressure block are arranged coaxially, and are respectively pressed and connected with the two ends of the thrust spring, and the ejector pin is fixed to the positioning cylinder. The positioning end is inserted into the pinhole and guided by the pinhole to slide, one end of the pressure block is inserted into the pinhole, the detection module includes a control circuit board, and a piezoresistive resistor board and a detection indicator light electrically connected to the control circuit board, the piezoresistive resistor board is arranged on the ejector seat, and its support is connected to the other end of the pressure block, and a plurality of thin film varistors are arranged in series on the piezoresistive resistor board, and the thin film varistor and the other end of the pressure block are always kept in a pressure-contact connection state, which is used to detect the ejector thrust and feed back to the control circuit board, and the detection indicator light is arranged on the outer peripheral surface of the handheld body, which is used to indicate when the ejector force reaches a preset pressure.

2. The needle withdrawal detection device for a motorcycle connector plug according to claim 1, characterized in that: The ejector seat can slide in the positioning cylinder, and is provided with several slide strips adapted to the slot. A driving head is provided at the other end of the ejector seat. A hollow hole is provided in the handheld body, and a driving thread is provided at one end of the hollow hole. The driving head is inserted into the hollow hole and connected through the driving thread. One end of the handheld body is rotatably connected to the connecting seat.

3. The needle withdrawal detection device for a motorcycle connector plug according to claim 2, characterized in that: A charging interface is provided at the other end of the handheld body, a battery is provided in the hollow hole, the battery is electrically connected to the charging interface, and the battery supplies power to the control circuit board.

4. The needle withdrawal detection device for a motorcycle connector plug according to claim 3, characterized in that: A lighting lamp is protruded on the outer peripheral surface of the base, and a lighting switch is arranged on the outer peripheral surface of the handheld body. The lighting lamp and the lighting switch are electrically connected to the battery.

5. The needle withdrawal detection device for a motorcycle connector plug according to claim 1, characterized in that: The positioning tube is sleeved with a dust cover for sealing the tube opening of the positioning tube.