CN111795767B - Test tool, test device and test method for buckle locking force - Google Patents

Abstract

The disclosure provides a testing tool, a testing device and a testing method for a clamping force, and belongs to the field of measurement. The testing tool comprises a base, a strip-shaped supporting block, at least two fixing shafts and at least two bearings; the base is a box body with an opening at one end, a tensile testing machine connecting structure is arranged at one end of the box body opposite to the opening, and an accommodating cavity communicated with the opening is formed in the box body; at least two fixed shafts are parallel to each other and fixed in the accommodating cavity along the extending direction of the opening; the at least two bearings correspond to the at least two fixed shafts one by one, and each bearing is sleeved outside the corresponding fixed shaft; the first end of the strip-shaped supporting block is slidably arranged on the at least two bearings, the middle part of the strip-shaped supporting block is inserted into the opening, and the second end of the strip-shaped supporting block is provided with a tension sensor connecting structure; go up the buckle and fix on the base, lower buckle is fixed on the first end of bar supporting shoe, and the bar supporting shoe is located between buckle and the at least two bearings. The present disclosure may improve accuracy.

Description

Test tool, test device and test method for buckle locking force

Technical Field

The disclosure relates to the field of measurement, and in particular relates to a tool, a device and a method for testing a locking force of a buckle.

Background

A snap is a mechanism for the embedded connection or integral locking of one part to another, usually made of a material with some flexibility. The buckle connection has the greatest characteristics of convenient installation and disassembly, tool-free disassembly and wide application.

In the related art, the buckle is usually clamped in the through hole in the sheet metal part, then the sheet metal part is fixed on a tensile testing machine, then the telescopic end of the tensile testing machine is fixedly connected with the buckle, finally the buckle is pulled out from the through hole in the sheet metal part by using the tensile testing machine, and the acting force of the tensile testing machine is measured in the process to be used as the locking force of the buckle.

In implementing the present disclosure, the inventors found that the related art has at least the following problems:

in the process that the tensile testing machine extracts the buckle from the through hole in the sheet metal part, the direction of the acting force of the tensile testing machine is possibly not parallel to the central line of the through hole in the sheet metal part, the component force perpendicular to the central line of the through hole in the sheet metal part in the acting force of the tensile testing machine is not used for overcoming the locking force of the buckle, the acting force of the tensile testing machine is different from the locking force of the buckle at the moment, and the measurement result of the locking force is inaccurate.

Disclosure of Invention

The embodiment of the disclosure provides a test tool, a test device and a test method for the locking force of a buckle, which are beneficial to the parallel of the acting force direction of a tensile testing machine and the central line of a through hole in a sheet metal part, the acting force of the tensile testing machine can be consistent with the locking force of the buckle, and the accuracy of the test of the locking force of the buckle is improved. The technical scheme is as follows:

in a first aspect, an embodiment of the present disclosure provides a test tool for a locking force of a buckle, where the test tool is adapted to test a locking force between an upper buckle and a lower buckle connected by the buckle; the testing tool comprises a base, a strip-shaped supporting block, at least two fixing shafts and at least two bearings; the base is a box body with an opening at one end, a tensile testing machine connecting structure is arranged at one end of the box body opposite to the opening, and an accommodating cavity communicated with the opening is formed in the box body; the at least two fixed shafts are parallel to each other and fixed in the accommodating cavity along the extending direction of the opening; the at least two bearings correspond to the at least two fixed shafts one by one, and each bearing is sleeved outside the corresponding fixed shaft; the first end of the strip-shaped supporting block is slidably arranged on the at least two bearings, the middle part of the strip-shaped supporting block is inserted into the opening, and the second end of the strip-shaped supporting block is provided with a tension sensor connecting structure;

the upper buckle is fixed on the base, the lower buckle is fixed at the first end of the strip-shaped supporting block, the strip-shaped supporting block is located between the upper buckle and the at least two bearings, and the upper buckle is connected with the lower buckle in a clamping mode.

Optionally, go up the buckle and include fixed connection's joint portion and fixed part, the fixed part is fixed on the outer wall of box, the outer wall of box have with hold the first through-hole of chamber intercommunication, joint portion inserts and establishes in the first through-hole, just the part of joint portion is located hold the intracavity.

Optionally, the test tool further comprises a guide rail with a strip-shaped groove, and the guide rail is fixed in the accommodating cavity; the inner wall of the strip-shaped groove is provided with a second through hole communicated with the first through hole, and the clamping part is inserted into the first through hole and the second through hole simultaneously; the strip-shaped groove extends along the extending direction of the opening, and at least part of the lower buckle is slidably arranged in the strip-shaped groove.

Optionally, the guide rail is fixed to the box body by a first fastener.

Optionally, the box includes first backup pad, second backup pad, first fixed plate, second fixed plate and connecting plate, first backup pad with the second backup pad sets up relatively, first fixed plate the second fixed plate with the connecting plate presss from both sides respectively and establishes first backup pad with between the second backup pad, first fixed plate with the second fixed plate vertical fixation is in on the same surface of connecting plate, at least two fixed axles press from both sides respectively and establish first fixed plate with between the second fixed plate.

Optionally, each of the first fixing plate and the second fixing plate has a third through hole and at least two limiting clamps, and the third through hole includes a communication hole and at least two limiting holes respectively communicated with the accommodating chamber; the at least two limiting holes are arranged along the extending direction of the opening, and the communication holes are respectively communicated with the at least two limiting holes along the extending direction of the opening; the at least two limiting holes, the at least two limiting hoops and the at least two fixing shafts are in one-to-one correspondence, the at least two limiting hoops are fixed in the communicating holes respectively and correspond to the inner walls of the limiting holes respectively to limit the isolation cavities, and the at least two fixing shafts are inserted in the corresponding isolation cavities respectively.

Optionally, the connecting plate has a fourth through hole communicated with the accommodating cavity, the tensile testing machine connecting structure includes a bolt and a nut, the bolt is inserted in the fourth through hole, and the nut is in threaded connection with the bolt.

Optionally, the tension sensor connection structure is a screw.

In a second aspect, an embodiment of the present disclosure provides that the testing apparatus includes a tensile testing machine, a tensile sensor, and a testing tool as provided in the first aspect, where the testing tool is connected to the tensile testing machine and the tensile sensor, respectively.

In a third aspect, an embodiment of the present disclosure provides a method for testing a locking force of a buckle, where the method is implemented by using the testing apparatus provided in the second aspect, and the method includes:

fixing an upper buckle on a base, fixing a lower buckle on a first end of a strip-shaped supporting block, wherein the strip-shaped supporting block is positioned between the upper buckle and at least two bearings, and the upper buckle is clamped with the lower buckle;

mounting the base on a tensile testing machine;

a tension sensor is arranged at the second end of the strip-shaped supporting block;

pulling the tension sensor by using the tension tester to drive the strip-shaped supporting block to slide on the at least two bearings until the lower buckle and the upper buckle are buckled;

and determining the locking force between the upper buckle and the lower buckle by using the tension sensor.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

through going up the buckle and fixing on the base, the base has the open-ended box for one end, has the chamber that holds with the opening intercommunication in the box, can set up two at least fixed axles and two at least bearings holding the intracavity. The at least two fixed shafts are parallel to each other and fixed in the accommodating cavity along the extending direction of the opening, and the at least two bearings are sleeved outside the corresponding fixed shafts, so that the at least two bearings are arranged along the extending direction of the opening. The first end slidable of bar supporting shoe sets up on at least two bearings and lies in between buckle and at least two bearings, will descend the buckle to fix on the first end of bar supporting shoe and with last buckle joint for the bar supporting shoe can only overcome along open-ended extending direction and goes up the locking force slip between buckle and the lower buckle, and the bearing rotates at the gliding in-process of bar supporting shoe, and the resistance effect can be ignored.

The middle part of the strip-shaped supporting block is inserted into the opening, and the second end of the strip-shaped supporting block is positioned outside the box body. And the second end of the strip-shaped supporting block is provided with a tension sensor connecting structure which can be fixedly connected with a tension sensor. The box has tensile testing machine connection structure with the opposite one end of opening, can with tensile testing machine fixed connection. And pulling the tension sensor by using a tension tester to enable the strip-shaped supporting block to move relative to the base. Because the bar-shaped supporting block can only overcome the locking force between the upper buckle and the lower buckle along the extending direction of the opening and slide, the measured value of the tension sensor is equal to the locking force between the upper buckle and the lower buckle, thereby ensuring the accuracy of the test of the locking force of the buckle.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a side view of a snap-lock force testing tool provided by an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of the direction A-A in FIG. 1 according to an embodiment of the present disclosure;

FIG. 3 is a front view of a tool for testing the latching force provided by embodiments of the present disclosure;

FIG. 4 is a schematic structural diagram of direction B-B in FIG. 3 according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a device for testing a locking force of a buckle according to an embodiment of the present disclosure;

fig. 6 is a flowchart of a method for testing a fastening force according to an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The embodiment of the disclosure provides a test tool for the locking force of a buckle, and the test tool is suitable for testing the locking force between an upper buckle and a lower buckle which are connected by the buckle. Fig. 1 is a side view of a tool for testing a locking force of a buckle according to an embodiment of the disclosure, and fig. 2 is a schematic structural diagram of a direction a-a in fig. 1 according to an embodiment of the disclosure. Referring to fig. 2, the test tool includes a base 21, a bar-shaped support block 22, at least two fixed shafts 23, and at least two bearings 24.

In the embodiment of the present disclosure, as shown in fig. 2, the base 21 is a box body having an opening 211 at one end, the box body has a tensile testing machine connecting structure 212 at an end opposite to the opening 211, and the box body has a receiving cavity 213 communicating with the opening 211.

At least two fixing shafts 23 are parallel to each other and fixed in the accommodating chamber 213 in the extending direction of the opening 211. At least two bearings 24 correspond to the at least two fixed shafts 23 one by one, and each bearing 24 is sleeved outside the corresponding fixed shaft 23.

First ends of the bar-shaped supporting blocks 22 are slidably disposed on the at least two bearings 24, the middle portions of the bar-shaped supporting blocks 22 are inserted into the openings 211, and second ends of the bar-shaped supporting blocks 22 have tension sensor connecting structures 221.

The upper buckle 11 is fixed on the base 21, the lower buckle 12 is fixed on a first end of a strip-shaped supporting block 22, the strip-shaped supporting block 22 is positioned between the upper buckle 11 and at least two bearings 24, and the upper buckle 11 is clamped with the lower buckle 12.

The working principle of the snap locking force testing tool provided by the embodiment of the disclosure will be briefly described with reference to fig. 2.

The base 21 is a box body having an opening 211 at one end, and the middle portion of the bar-shaped support block 22 is inserted into the opening 211. The case has a receiving cavity 213 communicating with the opening 211, and a first end of the bar-shaped support block 22 may be located in the receiving cavity 213, and it may be inferred that a second end of the bar-shaped support block 22 is located outside the case. The second end of the strip-shaped supporting block 22 is provided with a tension sensor connecting structure 221, so that the tension sensor is fixedly connected with the second end of the strip-shaped supporting block 22 during testing; and the end of the box body opposite to the opening 211 is provided with a tensile testing machine connecting structure 212, so that the tensile testing machine is fixedly connected with the end of the box body opposite to the opening 211 during testing. By pulling the tension sensor with the tensile tester, the first end of the strip-shaped support block 22 can be pulled out of the box body from the accommodating cavity 213, and the strip-shaped support block 22 moves relative to the base 21.

The upper buckle 11 is fixed on the base 21 and the lower buckle 12 is fixed on a first end of the strip-shaped support block 22, so that when the strip-shaped support block 22 moves relative to the base 21, the lower buckle 12 moves relative to the upper buckle 11. Since the upper buckle 11 and the lower buckle 12 are clamped, the movement of the lower buckle 12 relative to the upper buckle 11 needs to overcome the locking force between the upper buckle 11 and the lower buckle 12.

At least two fixing shafts 23 are parallel to each other and fixed in the accommodating chamber 213 in the extending direction of the opening 211. The at least two bearings 24 correspond to the at least two fixing shafts 23 one by one, each bearing 24 is sleeved outside the corresponding fixing shaft 23, and the at least two bearings 24 are arranged along the extending direction of the opening 211. The first end of bar-shaped supporting block 22 sets up on at least two bearings 24 slidably to bar-shaped supporting block 22 is located between buckle 11 and at least two bearings 24, therefore bar-shaped supporting block 22 can only slide along the extending direction of opening 211, and the bearing rotates at the gliding in-process of bar-shaped supporting block, and the resistance effect can be ignored, and the measuring value of tension sensor equals the locking force between buckle 11 and lower buckle 12 this moment, can guarantee the accuracy of measuring result.

This disclosed embodiment is through fixing last buckle on the base, and the base has the open-ended box for one end, has the chamber of holding with the opening intercommunication in the box, can set up two at least fixed axles and two at least bearings in holding the intracavity. The at least two fixed shafts are parallel to each other and fixed in the accommodating cavity along the extending direction of the opening, and the at least two bearings are sleeved outside the corresponding fixed shafts, so that the at least two bearings are arranged along the extending direction of the opening. The first end slidable of bar supporting shoe sets up on at least two bearings and lies in between buckle and at least two bearings, will descend the buckle to fix on the first end of bar supporting shoe and with last buckle joint for the bar supporting shoe can only overcome along open-ended extending direction and goes up the locking force slip between buckle and the lower buckle, and the bearing rotates at the gliding in-process of bar supporting shoe, and the resistance effect can be ignored.

The middle part of the strip-shaped supporting block is inserted into the opening, and the second end of the strip-shaped supporting block is positioned outside the box body. And the second end of the strip-shaped supporting block is provided with a tension sensor connecting structure which can be fixedly connected with a tension sensor. The box has tensile testing machine connection structure with the opposite one end of opening, can with tensile testing machine fixed connection. And pulling the tension sensor by using a tension tester to enable the strip-shaped supporting block to move relative to the base. Because the bar-shaped supporting block can only overcome the locking force between the upper buckle and the lower buckle along the extending direction of the opening and slide, the measured value of the tension sensor is equal to the locking force between the upper buckle and the lower buckle, thereby ensuring the accuracy of the test of the locking force of the buckle.

Alternatively, as shown in fig. 2, the upper buckle 11 may include a fixedly connected clamping portion 111 and a fixing portion 112, the fixing portion 112 is fixed on an outer wall of the box body, the outer wall of the box body has a first through hole 214 communicated with the accommodating cavity 213, the clamping portion 111 is inserted in the first through hole 214, and a part of the clamping portion 111 is located in the accommodating cavity 213.

Through being divided into fixed connection's joint portion 111 and fixed part 112 with last buckle 11, fixed part 112 is fixed on the outer wall of box, directly fixes last buckle 11 on base 21, and joint portion 111 inserts and establishes on the box outer wall and hold the first through-hole 214 that the chamber 213 communicates simultaneously, utilizes the inner wall of first through-hole 214 to prescribe a limit to the removal of last buckle 11. The portion of the clamping portion 111 is located in the accommodating cavity 213, and can be clamped with the lower buckle 12 located in the accommodating cavity 213. Consequently, above-mentioned implementation mode under the circumstances of buckle 11 and lower buckle 12 joint in the realization, the inner wall of first through-hole 214 is fixed to last buckle 11 on the outer wall of make full use of box and the box outer wall, avoids going up buckle 11 and follows down buckle 12 and remove together, is favorable to tension sensor accurate measurement to go up buckle 11 and the locking force between the buckle 12 down. But also facilitates the arrangement of guide rails on the inner wall of the cabinet (see below for details).

In the above implementation, the clamping portion 111 and the fixing portion 112 may be an integrally molded structure.

Illustratively, as shown in fig. 1 and 2, the fixing portion 112 may be a bar-shaped structure, one end of the bar-shaped structure is fixedly connected with the clamping portion 111, and the other end of the bar-shaped structure is fixed on the outer wall of the box body by the second fastening member 92.

The fixing portion 112 is fixed on the outer wall of the box body through the second fastener 92, the upper buckle 11 and the base 21 are detachably connected, the upper buckle 11 is conveniently replaced according to test requirements, and recycling of test tools is facilitated.

Illustratively, as shown in fig. 1, the number of the second fastening members 92 may be plural, and the plural second fastening members 92 are arranged along the extending direction of the bar structure.

The second fasteners 92 are arranged along the extending direction of the strip structure, so that the upper buckle 11 can be effectively prevented from moving relative to the base 21, and the upper buckle 11 can be firmly fixed on the base 21.

Illustratively, as shown in fig. 1, the number of the second fastening members 92 may be two.

In practical application, the upper buckle 11 can also be fixed on the inner wall of the box body.

Optionally, as shown in fig. 2, the testing tool may further include a guide rail 25 having a strip-shaped groove 251 (shown in fig. 4), and the guide rail 25 is fixed in the receiving cavity 213. The inner wall of the bar-shaped groove 251 has a second through hole 252 communicating with the first through hole 214, and the clamping portion 111 is inserted in both the first through hole 214 and the second through hole 252.

Fig. 3 is a front view of a tool for testing a locking force of a buckle according to an embodiment of the disclosure, and fig. 4 is a schematic structural diagram of direction B-B in fig. 3 according to an embodiment of the disclosure. Referring to fig. 3 and 4, a bar groove 251 extends in an extending direction of the opening 211, and at least a portion of the lower clip 12 is slidably disposed in the bar groove 251.

The guide rail 25 fixed in the receiving cavity 213 has a strip-shaped groove 251, the strip-shaped groove 251 extends along the extending direction of the opening 211, at least a part of the lower buckle 12 is slidably arranged in the strip-shaped groove 251, the lower buckle 12 can be guided to slide along the extending direction of the opening 211 by the strip-shaped groove 251 on the guide rail 25, the measured value of the tension sensor is equal to the locking force between the upper buckle 11 and the lower buckle 12, and the accuracy of the measured result is ensured.

And the inner wall of bar recess 251 has the second through-hole 252 with first through-hole 214 intercommunication, and joint portion 111 inserts simultaneously and establishes in first through-hole 214 and second through-hole 252, and joint portion 111 can pass through second through-hole 252 on the bar recess 251, makes the part of joint portion 111 be located and holds chamber 213, does not influence last buckle 11 and lower buckle 12 joint.

Alternatively, as shown in fig. 2, the guide rail 25 may be fixed to the case by a first fastener 91.

Guide rail 25 is fixed on the box through first fastener 91, can dismantle between guide rail 25 and the base 21 and be connected, conveniently when buckle 12 changes down, changes the guide rail 25 who matches with it, is favorable to utilizing under the bar groove 251 guide on the guide rail 25 buckle 12 to slide along opening 211's extending direction, guarantees measuring result's accuracy.

Illustratively, as shown in fig. 1, the number of the first fastening members 91 may be four, and the openings 211 are located in the space surrounded by the four first fastening members 91, so as to facilitate the first fastening members 91 to firmly fix the guide rail 25 on the box body.

Alternatively, as shown in fig. 2 and 4, the case may include a first support plate 215, a second support plate 216, a first fixing plate 217, a second fixing plate 218, and a connecting plate 219, the first support plate 215 and the second support plate 216 are disposed opposite to each other, the first fixing plate 217, the second fixing plate 218, and the connecting plate 219 are respectively interposed between the first support plate 215 and the second support plate 216, the first fixing plate 217 and the second fixing plate 218 are vertically fixed on the same surface of the connecting plate 219, and the at least two fixing shafts 23 are respectively interposed between the first fixing plate 217 and the second fixing plate 218.

The first support plate 215 and the second support plate 216 are disposed opposite to each other, and the connection plate 219 is interposed between the first support plate 215 and the second support plate 216, so that the stability of the connection plate 219 can be enhanced by the first support plate 215 and the second support plate 216. The first fixing plate 217 and the second fixing plate 218 are respectively clamped between the first supporting plate 215 and the second supporting plate 216, and in addition, the first fixing plate 217 and the second fixing plate 218 are vertically fixed on the same surface of the connecting plate 219, and the first fixing plate 217 and the second fixing plate 218 are simultaneously vertically fixed on the first supporting plate 215, the second supporting plate 216 and the connecting plate 219, so that the stability of the first fixing plate 217 and the second fixing plate 218 is optimized, and at least two fixing shafts 23 are favorably and firmly fixed in the accommodating cavity 213.

In the above implementation, the first and second fixing plates 217 and 218 may be vertically welded to the connection plate 219, respectively, the first support plate 215 may be vertically welded to the first and second fixing plates 217 and 218 and the connection plate 219, respectively, and the second support plate 216 may be vertically welded to the first and second fixing plates 217 and 218 and the connection plate 219, respectively.

Alternatively, as shown in fig. 3, each of the first and second fixing plates 217 and 218 may have a third through hole 31 and at least two stopper clips 32, and the third through hole 31 includes a communication hole 311 and at least two stopper holes 312 respectively communicating with the accommodation chamber 213. At least two stopper holes 312 are arranged along the extending direction of the opening 211, and the communication holes 311 are respectively communicated with the at least two stopper holes 312 along the extending direction of the opening 211. At least two limiting holes 312 and at least two limiting hoops 32 are in one-to-one correspondence with the at least two fixing shafts 23, the at least two limiting hoops 32 are respectively fixed in the communicating holes 311 and limit isolating cavities with the inner walls of the respective corresponding limiting holes 312, and the at least two fixing shafts 23 are inserted in the respective isolating cavities.

The fixing shaft 23 is fixed on the first fixing plate 217 and the second fixing plate 218 by forming a communication hole 311 communicating with the accommodating chamber 213 and at least two limiting holes 312 on the first fixing plate 217 and the second fixing plate 218, and providing a limiting clamp 32 in the communication hole 311 communicating with the at least two limiting holes 312, the limiting clamp 32 and the inner wall of the limiting hole 312 cooperating to define an isolated chamber in which the fixing shaft 23 is inserted. And at least two stopper holes 312 are arranged along the extending direction of the opening 211 so that at least two fixing shafts 23 are also arranged along the extending direction of the opening 211.

Illustratively, as shown in fig. 3, the cross-section of the limiting hole 312 is semicircular, the limiting clamp 32 is semicircular, and the cross-section of the isolating cavity defined by the limiting clamp 32 and the inner wall of the limiting hole 312 and the cross-section of the fixing shaft 23 are both circular.

Illustratively, as shown in fig. 3, the check yoke 32 may be fixed to an inner wall of the communication hole 311 by a third fastener 93.

Spacing clamp 32 passes through third fastener 93 to be fixed on the inner wall of intercommunicating pore 311, and spacing clamp 32 can dismantle between the base 21 and be connected, conveniently changes fixed axle 23 and the bearing 24 of cover-mounted on fixed axle 23.

Illustratively, as shown in fig. 3, the number of the third fastening members 93 may be two, and two third fastening members 93 are respectively fixed at both ends of the limit clip 32, so as to facilitate the fixing shaft 23 to be firmly fixed to the first fixing plate 217 and the second fixing plate 218.

Alternatively, as shown in fig. 2, the lower clip 12 may be fixed to the strip-shaped support block 22 by a fourth fastener 94.

Illustratively, as shown in fig. 2, the number of the fourth fastening members 94 may be plural, and a plurality of the fourth fastening members 94 are arranged along the extending direction of the opening 211.

The second fasteners 92 are arranged along the extending direction of the opening 211, so that the lower buckle 12 can be effectively prevented from moving relative to the strip-shaped support block 22, and the lower buckle 12 can be firmly fixed on the strip-shaped support block 22.

Illustratively, as shown in fig. 2, the number of fourth fasteners 94 may be two.

Alternatively, as shown in fig. 2, the connecting plate 219 may have a fourth through hole 33 communicating with the accommodating chamber 213, and the tensile tester connecting structure 212 may include a bolt 34 and a nut 35, the bolt 34 being inserted in the fourth through hole 33, the nut 35 being threadedly connected with the bolt 34.

The connecting plate 219 has a fourth through hole 33 communicating with the accommodating chamber 213, and a bolt 34 can be inserted in the fourth through hole 33; the bolt 34 can be fixed to the connecting plate 219 by screwing the nut 35 to the bolt 34. And the nut 35 is connected with the tensile testing machine in a threaded manner, so that the assembly and disassembly are very convenient.

Alternatively, as shown in fig. 2, the tension sensor coupling structure 221 may be a screw.

The screw rod and the tension sensor are connected in a threaded manner, so that the assembly and disassembly are very convenient.

The embodiment of the disclosure provides a testing device for a clamping and locking force. Fig. 5 is a schematic structural diagram of a device for testing a locking force of a buckle according to an embodiment of the present disclosure. Referring to fig. 5, the testing device includes a tensile testing machine 41, a tensile sensor 42 and a testing tool 43, and the testing tool 43 is connected to the tensile testing machine 41 and the tensile sensor 42 respectively.

In the disclosed embodiment, as shown in fig. 2, the test tool includes a base 21, a bar-shaped support block 22, at least two fixed shafts 23, and at least two bearings 24. The base 21 is a box body having an opening 211 at one end, a tensile testing machine connecting structure 212 is provided at the end of the box body opposite to the opening 211, and a containing cavity 213 communicated with the opening 211 is provided in the box body. At least two fixing shafts 23 are parallel to each other and fixed in the accommodating chamber 213 in the extending direction of the opening 211. At least two bearings 24 correspond to the at least two fixed shafts 23 one by one, and each bearing 24 is sleeved outside the corresponding fixed shaft 23. The first end of the strip-shaped supporting block 22 is slidably disposed on the at least two bearings 24, the middle portion of the strip-shaped supporting block 22 is inserted into the opening 211, and the second end of the strip-shaped supporting block 22 has a tension sensor connecting structure 221. The upper buckle 11 is fixed on the base 21, the lower buckle 12 is fixed on a first end of a strip-shaped supporting block 22, the strip-shaped supporting block 22 is positioned between the upper buckle 11 and at least two bearings 24, and the upper buckle 11 is clamped with the lower buckle 12.

Alternatively, as shown in fig. 5, the tensile tester 41 may include a base 411, a guide rail 412, and a moving rod 413, the guide rail 412 being fixed on the base 411, and the moving rod 413 being slidably disposed in the guide rail 412.

The embodiment of the disclosure provides a method for testing a locking force of a buckle, which is implemented by adopting a testing device shown in fig. 5. Fig. 6 is a flowchart of a method for testing a fastening force according to an embodiment of the present disclosure. Referring to fig. 6, the test method includes:

step 101: the upper buckle is fixed on the base, the lower buckle is fixed at the first end of the strip-shaped supporting block, the strip-shaped supporting block is positioned between the upper buckle and the at least two bearings, and the upper buckle and the lower buckle are connected in a clamping mode.

In the embodiment of the disclosure, the base is a box body with an opening at one end, the end of the box body opposite to the opening is provided with a tensile testing machine connecting structure, and an accommodating cavity communicated with the opening is formed in the box body. At least two fixed shafts are parallel to each other and fixed in the accommodating cavity along the extending direction of the opening. At least two bearings correspond to the at least two fixed shafts one by one, and each bearing is sleeved outside the corresponding fixed shaft. The first end slidable of bar supporting shoe sets up on at least two bearings, and the middle part of bar supporting shoe is inserted and is established in the opening, and the second end of bar supporting shoe has tension sensor connection structure.

Step 102: the base was mounted on a tensile tester.

In the embodiment of the disclosure, one end of the box body opposite to the opening is fixed on the tensile testing machine.

Step 103: and a tension sensor is arranged at the second end of the strip-shaped supporting block.

Step 104: and pulling the tension sensor by using a tension tester to drive the strip-shaped supporting block to slide on the at least two bearings until the lower buckle and the upper buckle are buckled.

Step 105: and determining the locking force between the upper buckle and the lower buckle by using a tension sensor.

The above description is intended only to illustrate the preferred embodiments of the present disclosure, and should not be taken as limiting the disclosure, as any modifications, equivalents, improvements and the like which are within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims (10)

1. A test tool for the locking force of a buckle is suitable for testing the locking force between an upper buckle (11) and a lower buckle (12) connected by the buckle; the device is characterized in that the testing tool comprises a base (21), a strip-shaped supporting block (22), at least two fixed shafts (23) and at least two bearings (24); the base (21) is a box body with an opening (211) at one end, a tensile testing machine connecting structure (212) is arranged at one end of the box body opposite to the opening (211), the tensile testing machine connecting structure (212) is used for connecting a tensile testing machine, and an accommodating cavity (213) communicated with the opening (211) is formed in the box body; the at least two fixed shafts (23) are parallel to each other and fixed in the accommodating cavity (213) along the extending direction of the opening (211); the at least two bearings (24) correspond to the at least two fixed shafts (23) one by one, and each bearing (24) is sleeved outside the corresponding fixed shaft (23); the first ends of the strip-shaped supporting blocks (22) are slidably arranged on the at least two bearings (24), the middle parts of the strip-shaped supporting blocks (22) are inserted into the opening (211), the second ends of the strip-shaped supporting blocks (22) are provided with tension sensor connecting structures (221), and the tension sensor connecting structures (221) are used for connecting tension sensors;

the upper buckle (11) is fixed on the base (21), the lower buckle (12) is fixed on a first end of the strip-shaped supporting block (22), the strip-shaped supporting block (22) is located between the upper buckle (11) and the at least two bearings (24), the upper buckle (11) is clamped with the lower buckle (12), and the strip-shaped supporting block (22) can overcome the locking force between the upper buckle (11) and the lower buckle (12) to slide along the extending direction of the opening.

2. The testing tool according to claim 1, characterized in that the upper buckle (11) comprises a fixedly connected clamping portion (111) and a fixing portion (112), the fixing portion (112) is fixed on an outer wall of the box body, the outer wall of the box body is provided with a first through hole (214) communicated with the accommodating cavity (213), the clamping portion (111) is inserted in the first through hole (214), and a part of the clamping portion (111) is positioned in the accommodating cavity (213).

3. The test tool according to claim 2, further comprising a guide rail (25) having a strip-shaped groove (251), the guide rail (25) being fixed within the receiving cavity (213); the inner wall of the strip-shaped groove (251) is provided with a second through hole (252) communicated with the first through hole (214), and the clamping part (111) is simultaneously inserted into the first through hole (214) and the second through hole (252); the strip-shaped groove (251) extends along the extending direction of the opening (211), and at least part of the lower buckle (12) is arranged in the strip-shaped groove (251) in a sliding mode.

4. The test tool according to claim 3, wherein the rail (25) is secured to the housing by a first fastener (91).

5. The testing tool according to any one of claims 1 to 4, wherein the box body comprises a first supporting plate (215), a second supporting plate (216), a first fixing plate (217), a second fixing plate (218) and a connecting plate (219), the first supporting plate (215) and the second supporting plate (216) are oppositely arranged, the first fixing plate (217), the second fixing plate (218) and the connecting plate (219) are respectively clamped between the first supporting plate (215) and the second supporting plate (216), the first fixing plate (217) and the second fixing plate (218) are vertically fixed on the same surface of the connecting plate (219), and the at least two fixing shafts (23) are respectively clamped between the first fixing plate (217) and the second fixing plate (218).

6. The test tool according to claim 5, wherein the first fixing plate (217) and the second fixing plate (218) each have a third through hole (31) and at least two limit clips (32), the third through hole (31) comprising a communication hole (311) and at least two limit holes (312) respectively communicating with the housing chamber (213); the at least two limiting holes (312) are arranged along the extending direction of the opening (211), and the communication holes (311) are respectively communicated with the at least two limiting holes (312) along the extending direction of the opening (211); at least two spacing holes (312), at least two spacing clamps (32) with at least two fixed axles (23) one-to-one, at least two spacing clamps (32) are fixed respectively with correspond separately in intercommunicating pore (311) the inner wall of spacing hole (312) is injectd and is kept apart the chamber, at least two fixed axles (23) are inserted and are established in the isolation chamber that corresponds separately.

7. The test tool according to claim 5, wherein the connection plate (219) has a fourth through hole (33) communicating with the accommodation chamber (213), the tensile tester connection structure (212) comprises a bolt (34) and a nut (35), the bolt (34) is inserted in the fourth through hole (33), and the nut (35) is screwed with the bolt (34).

8. The test tool according to any one of claims 1 to 4, wherein the tension sensor attachment structure (221) is a screw.

9. A device for testing the locking force of a buckle, characterized in that the device comprises a tensile testing machine (41), a tensile sensor (42) and a testing tool (43) according to any one of claims 1 to 8, wherein the testing tool (43) is respectively connected with the tensile testing machine (41) and the tensile sensor (42).

10. A method for testing a locking force of a buckle, wherein the method is implemented by using the testing apparatus of claim 9, and the method comprises:

fixing an upper buckle on a base, fixing a lower buckle on a first end of a strip-shaped supporting block, wherein the strip-shaped supporting block is positioned between the upper buckle and at least two bearings, and the upper buckle is clamped with the lower buckle;

mounting the base on a tensile testing machine;

a tension sensor is arranged at the second end of the strip-shaped supporting block;

pulling the tension sensor by using the tension tester to drive the strip-shaped supporting block to slide on the at least two bearings until the lower buckle and the upper buckle are buckled;

and determining the locking force between the upper buckle and the lower buckle by using the tension sensor.

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