A pull-off force testing device

Abstract

The present invention relates to the field of mechanical structure technology, and in particular to a pull-out force testing device. The pull-out force testing device provided by the present invention comprises a base, a force measuring assembly, a pull-out linkage assembly, a first support assembly and a second support assembly. The force measuring assembly comprises a dynamometer box and a dynamometer arranged in the dynamometer box. The dynamometer box can be horizontally movably arranged on the first support assembly. The force measuring end of the dynamometer is connected to a hook, and the hook is connected to a separation electrical connector through a flexible rope; the second support assembly comprises a horizontally arranged guide sleeve, and the pull-out linkage assembly comprises a screw and a screw sleeve handwheel. The screw is arranged in the guide sleeve, one end of the screw is connected to the dynamometer box, and the other end is connected to the screw sleeve handwheel. The screw sleeve handwheel is connected to the guide sleeve through a circumferential mortise and tenon groove. The screw sleeve handwheel is rotated so that the screw drives the dynamometer box to move horizontally until the separation electrical connector is disconnected. At this time, the dynamometer displays the separation force value of the separation plug, which is easy to operate, safe and reliable, and has high test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical structures, in particular to a pull-out force testing device, and specifically to a pull-out force testing device used for measuring the separation force of a spacecraft separation electrical connector. Background Art

[0002] Modern aircraft have various separation and jettisoning actions during flight to jettison fuel-depleted tanks. Therefore, a large number of separation electrical connectors are used in aerospace vehicles, and the performance of separation electrical connectors directly affects the separation work of the aircraft. However, in recent years, flight quality problems caused by problems with separation electrical connectors themselves and improper assembly operations have become common. Designers have systematically emphasized the need to test plug-in and pull-out separation electrical connectors and record separation force during assembly.

[0003] At present, the separation force measurement of the separation electrical connector is completed by the primitive method of spring scale or peak holding dynamometer relying on personnel to apply tension. When a certain tension is applied to the spring scale, the spring is stretched to a certain extent. At the moment when the separation electrical connector is disconnected, the huge rebound force has caused personal injury many times, and there is also a high risk of damage to the plug itself. When the peak holding dynamometer is disconnected, the instantaneous release of the tension makes the human arm unable to be controlled, which has the same risk as the spring scale. Especially in a small space, the huge stroke and rebound force are inevitable to damage other instruments. In terms of numerical interpretation, since the tension applied by the personnel is slightly different each time, it is not easy to correctly reflect the direction of the separation force during the actual flight of the product, resulting in differences in the separation force values. In particular, the instantaneous peak value of the spring scale is not easy to be recognized by the human eye, and there is a large error in the reading. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The purpose of the present invention is to provide a pull-off force testing device that can improve the assembly quality of a separation electrical connector, provide accurate separation force measurement values ​​and eliminate the risk of damage to personnel and products, so as to solve the problems that the existing separation force measurement method for separation electrical connectors is difficult to fully simulate the actual separation state of an aircraft, there is a risk of damage to personnel and products, and it is difficult for personnel to read accurate tension values.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a pull-out force testing device, comprising a base and a force measuring component and a pull-out linkage component arranged on the base, wherein one end of the force measuring component is provided with a hook, and the other end is fixedly connected to the pull-out linkage component;

[0008] It also includes a first support assembly, the force measuring assembly is arranged on the base through the first support assembly, the force measuring assembly includes a force meter box and a force meter arranged in the force meter box, the force meter box is horizontally movably arranged on the first support assembly, and the force measuring end of the force meter is connected to the hook;

[0009] It also includes a second supporting assembly, and the extraction linkage assembly is arranged on the base through the second supporting assembly, and the second supporting assembly includes a horizontally arranged guide sleeve, and the extraction linkage assembly includes a screw and a screw sleeve handwheel, and the screw is arranged in the guide sleeve, one end of the screw is connected to the dynamometer box, and the other end is connected to the screw sleeve handwheel, and the screw sleeve handwheel is connected to the guide sleeve through a circumferential mortise and tenon groove.

[0010] In a possible embodiment, the first supporting assembly includes a guide sliding mechanism, which includes a left support plate and a right support plate which are vertically arranged and each provided with a guide groove, and the left and right sides of the dynamometer box are each provided with a guide wing which cooperates with the guide groove; the left support plate and the right support plate are respectively fixedly connected to the base.

[0011] In a possible embodiment, the first supporting assembly further includes a roller mechanism disposed at the bottom of the dynamometer box, the roller mechanism including a roller and a sleeve disposed on the roller, the two ends of the roller are respectively connected to the left support plate and the right support plate, the sleeve is provided with a roller, and the roller is used to contact and connect with the dynamometer box.

[0012] In a possible embodiment, the dynamometer box includes a box body, the dynamometer is fixed in the box body, an opening is provided on the side of the box body close to the force measuring end of the dynamometer, the opening is used for allowing the pull rod of the dynamometer to extend, and a rubber pad is provided between the inner side surface of the box body and the dynamometer.

[0013] In a possible implementation manner, a pressure strip is provided on the box body, the pressure strip presses the dynamometer via a fastener, and the rubber pad is provided between the pressure strip and the dynamometer.

[0014] In a possible implementation, the second supporting assembly further includes a blocking piece, and the blocking piece is connected to an end of the screw rod away from the dynamometer box through a connecting member.

[0015] In a possible implementation manner, the second support assembly further includes a guide screw disposed on the guide sleeve, and the guide screw is used to limit the circumferential movement of the screw rod.

[0016] In a possible implementation, the second supporting assembly further includes a vertically arranged support, the support is fixedly connected to the base, and the guide sleeve is arranged at a top end of the support.

[0017] In a possible implementation manner, the base is provided with a plurality of mounting holes, and the mounting holes are used to be connected to the aircraft via fasteners.

[0018] In a possible implementation, the dynamometer is a digital dynamometer with a peak hold function.

[0019] (III) Beneficial effects

[0020] The above technical scheme of the present invention has the following advantages: the present invention provides a pull-out force testing device, comprising a base, a force measuring assembly and a pull-out linkage assembly arranged on the base, and a first support assembly and a second support assembly, wherein the force measuring assembly is arranged on the base through the first support assembly, the force measuring assembly comprises a dynamometer box and a dynamometer arranged in the dynamometer box, the dynamometer box can be arranged on the first support assembly horizontally movably, the force measuring end of the dynamometer is connected to a hook, and the hook is connected to the separation electrical connector through a flexible rope; the pull-out linkage assembly is arranged on the base through the second support assembly, the second support assembly comprises a horizontally arranged guide sleeve, the pull-out linkage assembly comprises a screw and a screw sleeve handwheel, the screw is arranged in the guide sleeve, one end of the screw is connected to the dynamometer box, and the other end is connected to the screw sleeve handwheel, the screw sleeve handwheel is connected to the guide sleeve through a circumferential mortise and tenon groove, and the screw sleeve handwheel is rotated so that the screw drives the dynamometer box to move horizontally until the separation electrical connector is disconnected. At this time, the dynamometer displays the separation force value of the separation plug.

[0021] In this way, by using this device to measure the separation force of the separating electrical connector, the peak value of the measured value is maintained, which is beneficial to the operator's reading. At the same time, it also eliminates the large error in the multiple measurement values ​​of the same plug and the hidden danger of damage to the product caused by the original measurement method. In addition, the separation force measurement work that originally required two people to cooperate can now be successfully completed by one person through the use of this device, freeing up manpower, improving work efficiency, and providing effective protection for both personal and product safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a pull-out force testing device of the present invention;

[0023] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of AA in FIG.

[0024] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure of BB in FIG.

[0025] Figure 4 is a schematic diagram of the connection between the separation electrical connector and the cable bracket;

[0026] Figure 5It is a connection diagram of a separation electrical connector and a pull-out force testing device. Specific implementation methods

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Spacecrafts use a large number of separation electrical connectors, and the performance of separation electrical connectors directly affects the separation work of the aircraft. The quality of separation force measurement of separation electrical connectors directly affects the separation action of the product during formal flight. Therefore, it is of great significance to develop a device that can accurately measure the separation force of separation electrical connectors.

[0029] like Figures 1 to 3 As shown, the present invention provides a pull-out force testing device, including a base 23 and a force measuring component and a pull-out linkage component arranged on the base 23, one end of the force measuring component is provided with a hook 1, and the other end is fixedly connected to the pull-out linkage component; it also includes a first support component, the force measuring component is arranged on the base 23 through the first support component, the force measuring component includes a dynamometer box 3 and a dynamometer 2 arranged in the dynamometer box 3, the dynamometer box 3 can be arranged on the first support component horizontally movably, and the force measuring end of the dynamometer 2 is connected to the hook 1; it also includes a second support component, the pull-out linkage component is arranged on the base 23 through the second support component, the second support component includes a horizontally arranged guide sleeve 11, the pull-out linkage component includes a screw 8 and a screw sleeve handwheel 12, the screw 8 is arranged in the guide sleeve 11, one end of the screw 8 is connected to the dynamometer box 3, and the other end is connected to the screw sleeve handwheel 12, and the screw sleeve handwheel 12 is connected to the guide sleeve 11 through a circumferential mortise and tenon groove. In this embodiment, the screw rod 8 is connected to the dynamometer box 3 via a fastener 7; the dynamometer 2 adopts a stroke-free tension sensor, and the system has a peak value display function.

[0030] Specifically, the present application provides a pull-out force test device, wherein one end of the dynamometer 2 is connected to the hook 1, and the hook 1 can be connected to the separation electrical connector through a flexible rope, wherein the pull rod of the dynamometer 2 is directly opposite to the separation plug core rod of the separation electrical connector to improve the test accuracy; the dynamometer 2 is fixed in the dynamometer box 3, and the dynamometer box 3 is connected to the screw 8 in the pull-out linkage assembly, and the screw 8 is driven to move axially along the guide sleeve 11 by rotating the screw sleeve handwheel 12, thereby driving the dynamometer 2 to pull the separation electrical connector through the flexible rope until the separation electrical connector is disconnected. At this time, the dynamometer 2 displays the separation force value of this separation plug.

[0031] In this way, by applying this device to measure the separation force of the separation electrical connector, the peak value of the measured value is maintained, which is beneficial to the operator's reading, and at the same time eliminates the large error in the multiple measurement values ​​of the same plug and the hidden danger of damage to the product caused by the original measurement method. In addition, the separation force measurement work that originally required two people to cooperate can be successfully completed by one person through the use of this device, which frees up manpower, improves work efficiency, and provides effective protection for personal and product safety. The separation force measurement work is realized by using the pull-out force test device provided by the present invention. The handwheel screw 8 is used, and the guide sleeve 11 limits the circumferential movement of the screw 8. The screw 8 has a self-locking function, which eliminates the huge stroke and rebound force of the measuring equipment, and has a peak tension value preservation function, which improves the assembly quality of the separation electrical connector.

[0032] Preferably, the hook 1 can be an "S" hook to ensure the connection effect between the dynamometer 2 and the flexible rope, thereby helping to improve the force measurement accuracy.

[0033] In a possible embodiment, the first support assembly includes a guide sliding mechanism, which includes a left support plate 15 and a right support plate 17 which are vertically arranged and both have guide grooves, and the left and right sides of the dynamometer box 3 are provided with guide wings that cooperate with the guide grooves; the left support plate 15 and the right support plate 17 are respectively fixedly connected to the base 23.

[0034] During the sliding of the dynamometer box 3, the left support plate 15 and the right support plate 17 play a guiding role. Among them, the left and right are the two sides of the stretching direction of the dynamometer 2, that is, the left and right lines are perpendicular to the stretching direction of the dynamometer 2. In addition, it should be noted that the shape of the guide wing on the dynamometer box 3 is not limited, as long as it can cooperate with the guide groove so that the dynamometer box 3 can move back and forth along the guide groove. Preferably, the left support plate 15 and the right side are respectively welded to the base 23, which is easy to operate and has a good fixed connection effect. Of course, the connection method is not limited to welding, and can also be other connection methods such as mortise and tenon connection, or screw connection.

[0035] In a possible embodiment, the first support assembly also includes a roller 18 mechanism disposed at the bottom of the dynamometer box 3, the roller 18 mechanism includes a roller 21 and a sleeve 20 disposed on the roller 21, the two ends of the roller 21 are respectively connected to the left support plate 15 and the right support plate 17, the sleeve 20 is provided with a roller 18, and the roller 18 is used to contact and connect with the dynamometer box 3.

[0036] In order to further improve the reliability of the sliding of the dynamometer box 3, the first support assembly also includes a roller 18 mechanism, which is connected to the left support plate 15 and the right support plate 17 by a roller 21 and a fastener 22. A sleeve 20 is sleeved on the roller 21 to limit the distance between the left support plate 15 and the right support plate 17 to prevent the distance between the left support plate 15 and the right support plate 17 from becoming smaller when tightening the fastener, thereby clamping the dynamometer box 3 and causing the friction to increase and the sliding to be blocked. Preferably, the roller 18 is a nylon roller, and three nylon rollers are mounted on the sleeve 20. The nylon rollers just contact the bottom of the dynamometer box 3 to improve the guiding property of the dynamometer box 3, and the three nylon rollers are limited in position by four limit sleeves 19, so that the dynamometer box 3 is evenly supported.

[0037] In a possible implementation, the dynamometer box 3 includes a box body, in which the dynamometer 2 is fixed, and the dynamometer 2 has a peak holding function. An opening is provided on the force measuring end side of the box body close to the dynamometer 2, and the opening is used for the pull rod of the dynamometer 2 to extend and connect with the hook 1. A rubber pad is provided between the inner side of the box body and the dynamometer 2 to protect the dynamometer 2 from damage. A rubber pad 4 is placed between the inner side of the front end of the dynamometer box 3 and the dynamometer 2, and a rubber pad 16 is placed between the other inner side of the dynamometer box 3 and the dynamometer 2.

[0038] In a possible implementation, a pressure strip 5 is provided on the box body, and the pressure strip 5 presses the dynamometer 2 through a fastener to prevent the dynamometer 2 and the dynamometer box 3 from relative movement, so as to improve the detection accuracy. A rubber pad 16 is provided between the pressure strip 5 and the dynamometer 2 to protect the dynamometer 2 from damage. In this embodiment, the pressure strip 5 presses the dynamometer 2 through a fastening bolt 6.

[0039] In a possible implementation, the second support assembly further includes a baffle 14, which is connected to one end of the screw rod 8 away from the dynamometer box 3 through a connecting member, and can limit the length of the screw rod 8 extending in the direction of the disconnecting plug of the disconnecting electrical connector, so as to prevent the screw sleeve hand wheel 12 from being screwed out of the screw rod 8. Preferably, the connecting member is a screw 13.

[0040] In a possible implementation, the second support assembly further includes a guide screw 10 disposed on the guide sleeve 11 , and the guide screw 10 is used to limit the circumferential movement of the screw rod 8 to improve the test accuracy.

[0041] In a possible implementation, the second support assembly further includes a vertically arranged support 9 , the support 9 is fixedly connected to the base 23 , and the guide sleeve 11 is arranged at the top end of the support 9 .

[0042] Preferably, the support 9 is welded to the base 23, which is easy to operate and has a good fixed connection effect. Of course, the connection method is not limited to welding, and can also be other connection methods such as mortise and tenon connection, or screw connection.

[0043] In a possible implementation manner, the base 23 is provided with a plurality of mounting holes, and the mounting holes are used to connect to the aircraft through fasteners.

[0044] The support 9 of the pull-out force testing device provided in the present application is provided with a mounting hole, which can be connected to the mounting hole of the separation cable bracket for installing the aerospace product, and the separation connector pull-out force testing device is connected to the aircraft through connecting bolts.

[0045] In a possible implementation, the dynamometer 2 is a digital dynamometer 2 with a peak hold function. The digital dynamometer 2 has a display screen for easy reading. The digital dynamometer 2 has a peak hold function, which is beneficial to improving test accuracy.

[0046] The following is a test method for the pull-off force test device provided by this application:

[0047] Since the connection diagram of the separation plug on the official product is as follows Figure 4 As shown, the pull-out force test device needs to use the screw holes at the installation position of the steel cable bracket. Twelve Φ6 mounting holes are designed on the base 23 of the pull-out force test device. Through the mounting holes on the base 23, the device can be fixed to the aircraft with bolts. A digital dynamometer 2 is placed in the dynamometer box 3 of the device. The dynamometer has a peak hold function. The dynamometer pull rod extends from the front end of the dynamometer box 3 and is connected to the "S" hook.

[0048] During operation, first press Figure 5 Schematic diagram of the pull-out force measurement work: The pull-out force test device is connected to the aircraft through the connecting bolts. At this moment, looking in the opposite direction of the pull-out force, the screw sleeve hand wheel 12 is turned counterclockwise to make the screw rod 8 extend in the direction of the separation plug until the baffle 14 and the screw sleeve hand wheel 12 are against each other, that is, the "S" hook is closest to the separation plug, and the "S" hook of the core rod of the separation electrical connector tail section is connected to the "S" hook on the device with a flexible rope. At this moment, looking in the opposite direction of the pull-out force, the screw sleeve hand wheel 12 is turned clockwise to make the screw rod 8 drive the dynamometer box 3 to move away from the separation plug until the flexible rope is straightened and the display screen of the dynamometer 2 shows no more than 0.1Kg, and the electrical connector is protected manually to prevent the plug from falling or bumping after disconnection, and the screw sleeve hand wheel 12 is slowly and evenly turned clockwise until the separation electrical connector is disconnected. At this time, the dynamometer display screen displays the separation force value of this separation plug.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pull-off force testing device, characterized in that: It comprises a base, a force measuring component and a pull-out linkage component arranged on the base, wherein one end of the force measuring component is provided with a hook, and the other end is fixedly connected to the pull-out linkage component; It also includes a first support assembly, the force measuring assembly is arranged on the base through the first support assembly, the force measuring assembly includes a force meter box and a force meter arranged in the force meter box, the force meter box is horizontally movably arranged on the first support assembly, and the force measuring end of the force meter is connected to the hook; It also includes a second support assembly, the extraction linkage assembly is arranged on the base through the second support assembly, the second support assembly includes a horizontally arranged guide sleeve, the extraction linkage assembly includes a screw and a screw sleeve handwheel, the screw is arranged in the guide sleeve, one end of the screw is connected to the dynamometer box, and the other end is connected to the screw sleeve handwheel, and the screw sleeve handwheel is connected to the guide sleeve through a circumferential mortise and tenon groove; The first support assembly includes a guide sliding mechanism, the guide sliding mechanism includes a left support plate and a right support plate which are vertically arranged and each of which is provided with a guide groove, and the left and right sides of the dynamometer box are provided with guide wings which cooperate with the guide groove; the left support plate and the right support plate are respectively fixedly connected to the base; The first support assembly also includes a roller mechanism disposed at the bottom of the dynamometer box, the roller mechanism includes a roller and a sleeve disposed on the roller, the two ends of the roller are respectively connected to the left support plate and the right support plate, the sleeve is provided with a roller, and the roller is used to contact and connect with the dynamometer box; The second support assembly further comprises a baffle, which is connected to an end of the screw rod away from the dynamometer box through a connecting member; The second support assembly further comprises a guide screw disposed on the guide sleeve, wherein the guide screw is used to limit the circumferential movement of the screw rod; The second supporting assembly also includes a vertically arranged support, the support is fixedly connected to the base, and the guide sleeve is arranged on the top end of the support.

2. The pull-out force testing device according to claim 1, characterized in that: The dynamometer box comprises a box body, the dynamometer is fixed in the box body, an opening is provided on the side of the box body close to the force measuring end of the dynamometer, the opening is used for the pull rod of the dynamometer to extend, and a rubber pad is provided between the inner side surface of the box body and the dynamometer.

3. The pull-out force testing device according to claim 2, characterized in that: A pressure strip is arranged on the box body, and the pressure strip presses the dynamometer through a fastener, and the rubber pad is arranged between the pressure strip and the dynamometer.

4. The pull-out force testing device according to claim 1, characterized in that: The base is provided with a plurality of mounting holes, and the mounting holes are used to be connected to the aircraft through fasteners.

5. The pull-out force testing device according to claim 1, characterized in that: The dynamometer is a digital dynamometer with a peak hold function.

Images