Clamping device for measuring crimping resistance of wire and terminal and use method

Abstract

The invention discloses a clamping device for measuring crimping resistance of a wire and a terminal. A base assembly is used for placing a tested sample; the two supporting assemblies are arranged on the base assembly in a spaced mode, and the hinged ends of the supporting assemblies are rotationally connected with the base assembly; the fixed ends of the transmission assemblies are connected to the supporting assembly, and the fixed ends of the multiple transmission assemblies are connected to the supporting assembly at intervals. The output end of the transmission assembly can move along the length direction of the tested sample relative to the fixed end of the transmission assembly; the output ends of the plurality of transmission assemblies are arranged at intervals along the length direction of the tested sample; the multiple pressing parts are connected to the output ends of the multiple transmission assemblies correspondingly. Under the action of gravity, the supporting assembly rotates around the hinged end under the action of gravity so as to drive the pressing part to press the tested sample on the base assembly. The operation difficulty in the measurement process is reduced, the measurement influence caused by manual operation factors is completely eradicated, the number of operators is reduced, and the accuracy and precision of the measurement result are effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of railway passenger cars, in particular, relates to a clamping device for measuring the resistance of wire and terminal crimping and a use method. BACKGROUND

[0002] The crimping quality of the wire and the terminal directly affects the safe operation of the railway passenger car. In the field of railway passenger car electricity, crimping is attributed to a special process. In order to strengthen the quality control of the crimping process, relevant technical standards all require monitoring the crimping quality through various verification tests, which include crimping resistance tests. After the terminal and the wire are crimped and connected, the resistance of the terminal head crimping part is the crimping resistance, which is an important parameter for measuring the crimping quality. The relevant technical standards have clear requirements for the size of the crimping resistance. The principle of measuring the crimping resistance is to measure the voltage at both ends of the crimping part and the wire of the same length under the same current using a precise voltmeter, then measure the voltage at both ends of the wire of twice the length of the crimping part, and then determine whether the resistance of the terminal head crimping part is less than twice the resistance of the connected wire of the same length by using proportional conversion according to the length of the measurement section.

[0003] Due to the different types of terminals and wire specifications, the crimping part length is generally between 3mm-40mm. In the actual measurement process, the following problems exist: when the detector holds two measuring rods against the corresponding measurement points with hands for measurement, the actual measurement points deviate from the specified measurement points due to visual or unstable factors. When the crimping part length is 3mm, a 1mm position deviation can cause a large deviation. The crimping resistance is actually a very small resistance, and changes in measurement conditions can greatly affect the test results. When the detector holds the measuring rod against the measurement point with hands, the pressure is always changing, and the measured voltage is in constant change, which seriously affects the accuracy and repeatability of the measurement results. According to the test requirements of the standard, the test current should be turned on immediately for measurement, and each measurement time should be no more than 5s. In the actual measurement process, if one person is responsible for holding two measuring rods to measure the voltage, another person must be arranged to turn on and off the current, and the measurement work needs to be arranged for two people to cooperate, which is low in work efficiency.

[0004] Therefore, it is an urgent technical problem to develop a clamping device for measuring the resistance of wire and terminal crimping and a use method to reduce the operation difficulty of the measurement process, eliminate the measurement influence caused by human operation factors, reduce the number of operators, and effectively guarantee the correctness and precision of the measurement results. SUMMARY

[0005] The application aims to provide a wire and terminal crimping resistance measurement clamping device and a use method, which reduces the operation difficulty in the measurement process, eliminates the measurement influence caused by human operation factors, reduces the number of operators, and effectively guarantees the correctness and precision of the measurement results.

[0006] To achieve the above-mentioned application purposes, the application adopts the following technical solutions: In one aspect, the application provides a wire and terminal crimping resistance measurement clamping device, which comprises: a base assembly for placing a measured sample; two support assemblies, which are arranged at intervals on the base assembly, and the hinge ends of the support assemblies are rotatably connected to the base assembly; a plurality of transmission assemblies, the fixed ends of the transmission assemblies are connected to the support assemblies, and the fixed ends of the plurality of transmission assemblies are arranged at intervals on the support assemblies; the output ends of the transmission assemblies are movable along the length direction of the measured sample relative to the fixed ends of the transmission assemblies; and the output ends of the plurality of transmission assemblies are arranged at intervals along the length direction of the measured sample; a plurality of pressing parts, which are respectively connected to the output ends of the plurality of transmission assemblies; Under the action of gravity, the support assemblies rotate around the hinge ends under the action of gravity to drive the pressing parts to press the measured sample on the base assembly.

[0007] In some embodiments of the application, the transmission assembly comprises a lead screw and a sliding block, the two ends of the lead screw are rotatably connected to the support assemblies respectively, and the sliding block is threadedly connected to the lead screw; and the plurality of lead screws are arranged at intervals on the support assemblies. Under the state that the lead screw rotates relative to the support assembly, the sliding block moves along the length direction of the measured sample.

[0008] In some embodiments of the application, a plurality of guide parts are further included, the two ends of the guide part are respectively connected to the two support assemblies, and the plurality of guide parts are arranged at intervals on the two support assemblies. The sliding block is provided with a sliding part, and a guide hole is formed in the sliding part; the guide hole penetrates the sliding part and the sliding block; The plurality of guide parts penetrate the plurality of guide holes respectively, and in the process that the lead screw drives the sliding block to move, the sliding block is slidably connected to the guide part.

[0009] In some embodiments of the present application, the plurality of lead screws comprises at least a first lead screw, a second lead screw and a third lead screw; the plurality of sliders comprises at least a first slider, a second slider and a third slider; the first lead screw is threadedly connected with the first slider, the second lead screw is threadedly connected with the second slider, and the third lead screw is threadedly connected with the third slider; The plurality of guide portions comprises at least a first guide portion, a second guide portion and a third guide portion; The sliding portion provided on the first slider is defined as a first sliding portion, and a guide hole provided on the first sliding portion is defined as a first guide hole; The sliding portion provided on the second slider is defined as a second sliding portion, and a guide hole provided on the second sliding portion is defined as a second guide hole; The sliding portion provided on the third slider is defined as a third sliding portion, and a guide hole provided on the third sliding portion is defined as a third guide hole; The first guide portion is in sliding connection with the first guide hole, the second guide portion is in sliding connection with the second guide hole, and the third guide portion is in sliding connection with the third guide hole.

[0010] In some embodiments of the present application, a first through hole is provided on the first slider, the second guide portion and the third guide portion penetrate through the first through hole, and the second guide portion and the third guide portion are not in contact with the first through hole; A second through hole is provided on the second slider, the first guide portion and the third guide portion penetrate through the second through hole, and the first guide portion and the third guide portion are not in contact with the second through hole; A third through hole is provided on the third slider, the first guide portion and the second guide portion penetrate through the third through hole, and the first guide portion and the second guide portion are not in contact with the third through hole.

[0011] In some embodiments of the present application, the pressing portion comprises a probe head and a probe spring, one end of the probe spring is connected with the output end of the transmission assembly, the probe head is connected with the other end of the probe spring, and the probe head is used for pressing the sample to be measured on the base assembly.

[0012] In some embodiments of the present application, a measuring portion is further provided, two ends of the measuring portion are respectively connected with two support assemblies, the measuring portion is arranged along the moving direction of the output end of the transmission assembly, and the measuring portion is used for measuring the distance between the two pressing portions.

[0013] In some embodiments of the present application, the base assembly comprises a base body and two support seats, and the two support seats are respectively arranged on the base body. The hinged ends of the support assembly are rotatably connected with the two support seats respectively; under the action of gravity of the support assembly, the support assembly rotates around the hinged ends to drive the pressing part to press the sample to be measured on the base assembly.

[0014] In some embodiments of the present application, a through hole is formed in the support assembly, the end of the lead screw extending out of the through hole, and a knob part is arranged at the end of the lead screw extending out of the through hole, the knob part being capable of driving the lead screw to rotate. The knob part connected with the first lead screw is defined as a first knob part, the knob part connected with the second lead screw is defined as a second knob part, and the knob part connected with the third lead screw is defined as a third knob part.

[0015] In another aspect, the present application also relates to a method for using the wire and terminal crimping resistance measurement clamping device, which uses any of the wire and terminal crimping resistance measurement clamping devices described above for testing, and the steps include: S1: rotating the two support assemblies to make the pressing part disengage from the base assembly; S2: placing the sample to be measured on the base assembly; connecting the sample to be measured with a power supply; connecting a first voltmeter between the first measuring rod head and the second measuring rod head, and connecting a second voltmeter between the second measuring rod head and the third measuring rod head; S3: referring to the data of the measuring part, rotating the first knob part, and driving the first sliding block to move along the sample to be measured to a first target position of the sample to be measured by the first lead screw; referring to the data of the measuring part, rotating the second knob part, and driving the second sliding block to move along the sample to be measured to a second target position of the sample to be measured by the second lead screw; referring to the data of the measuring part, rotating the third knob part, and driving the third sliding block to move along the sample to be measured to a third target position of the sample to be measured by the third lead screw; S4: rotating the two support assemblies to drive the first measuring rod head, the second measuring rod head and the third measuring rod head to be pressed at the first target position, the second target position and the third target position; S5: turning on the power supply to apply a test current, reading the voltage value of the first voltmeter, and reading the voltage value of the second voltmeter.

[0016] Compared with the prior art, the present application has the following advantages and positive effects: The measured sample is placed on the base assembly, and the two support assemblies are rotatably connected to the base assembly through the hinged ends. The fixed ends of the plurality of transmission assemblies are arranged on the base assembly in intervals, and the output ends of the plurality of transmission assemblies are moved to the target position along the length direction of the measured sample. The support assembly drives the pressing part to rotate relative to the base assembly to press the measured sample on the base assembly. The pressing part is pressed on the measured sample by the operator, which reduces the operation difficulty, eliminates the measurement influence caused by the operation factor, reduces the number of operators, and effectively ensures the correctness and precision of the measurement result.

[0017] Other features and advantages of the present application will become more apparent from the following detailed description of the application when read in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is one of the overall structure schematic diagrams of one embodiment of the wire and terminal crimping resistance measuring clamping device proposed by the present application; Figure 2 is a partial schematic diagram of A in Figure 1 Figure 3 is a top view of one embodiment of the wire and terminal crimping resistance measuring clamping device proposed by the present application; Figure 4 is a partial schematic diagram of B in Figure 3 Figure 5 is a front view of one embodiment of the wire and terminal crimping resistance measuring clamping device proposed by the present application; Figure 6 is a partial schematic diagram of C in Figure 5 Figure 7 is the second overall structure schematic diagram of one embodiment of the wire and terminal crimping resistance measuring clamping device proposed by the present application; Figure 8 is a schematic diagram of the measured sample and the power supply proposed by the present application; In the figure, 110, base body; 120, support seat; 200, support assembly; 210, hinged end;​​​ 311 first screw rod 3111 first knob part 312 second screw rod 3121 second knob part 313 third screw rod 3131 third knob part 320 slider 321 first connecting part 322 second connecting part 323 third connecting part 324 first slider 3241 first sliding part 3242 first through hole 325 second slider 3251 second sliding part 3252 second through hole 3261 third sliding part 3262 third through hole 326 third slider 327 first avoiding hole 328 second avoiding hole 329 third avoiding hole 400 pressing part 411 first probe head 412 second probe head 413 third probe head 421 first probe spring 422 second probe spring 423 third probe spring 500 sample to be measured 510 terminal 520 wire 521 first voltmeter 522 second voltmeter 530 power supply 600 guiding part 610 first guiding part 620 second guiding part 630 third guiding part 700 measuring part DETAILED DESCRIPTION

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0026] The crimped resistor is actually a very small resistor, and changes in measurement conditions can significantly affect the test results. When the pressure applied by the operator holding the probe against the measurement point is constantly changing, the measured voltage will also fluctuate, severely impacting the accuracy and repeatability of the measurement results. According to standard test requirements, measurements should be taken immediately upon connecting the test current, with each measurement lasting no more than 5 seconds. In actual measurement, if one person is responsible for holding both probes to measure the voltage, another person must be assigned to turn the current on and off. This requires two people to work together, resulting in low efficiency. When the operator holds both probes against the corresponding measurement point, factors such as visual perception or physical instability can cause the actual measurement point to deviate from the specified measurement point. When the crimped part is 3mm long, a 1mm deviation can introduce approximately a 17% error.

[0027] Therefore, a clamping device for measuring the resistance of wires and terminals is used to avoid the aforementioned problems caused by manual measurement.

[0028] In some embodiments of this application, a clamping device for measuring the crimp resistance of a wire and terminal is disclosed, such as... Figure 1 , Figure 3 , Figure 5 , Figure 7 As shown, it includes a base assembly, two support assemblies 200, multiple transmission assemblies, and multiple clamping parts 400.

[0029] The base assembly is used to hold the test sample 500.

[0030] Two support components are spaced 200 apart on the base component.

[0031] like Figure 1 , Figure 3 , Figure 5 , Figure 7 As shown, the hinge end 210 of the support assembly 200 is rotatably connected to the base assembly. Under the action of gravity, the support assembly 200 rotates relative to the hinge end 210 until it presses against the base assembly.

[0032] The fixed end of the transmission component is connected to the support component 200. The output end of the transmission component can move relative to the fixed end of the transmission component along the length of the sample 500 being tested.

[0033] The output ends of multiple transmission components are spaced apart along the length of the sample 500 being tested.

[0034] Multiple clamping parts 400 are respectively connected to the output ends of multiple transmission components.

[0035] Since the weight of multiple clamping parts 400, multiple transmission components, and two support components 200 is applied to the hinge end 210 of the support component 200, the multiple clamping parts 400, multiple transmission components, and two support components 200 can rotate relative to the hinge end 210 under the action of gravity, thereby driving the multiple clamping parts 400 to press the sample 500 to be tested onto the base assembly.

[0036] The base assembly includes a base body 110 and two support seats 120. The two support seats 120 are spaced apart on the base body 110.

[0037] The hinge end 210 of the support component 200 is rotatably connected to two support bases 120 respectively. Under the action of the gravity of the support component, the support component 200 rotates around the hinge end 210 to drive the pressing part 400 to press the sample 500 to be tested onto the base component.

[0038] In some embodiments of this application, the transmission assembly includes a lead screw and a slider 320. The two ends of the lead screw are rotatably connected to two support assemblies 200 via bearings. The slider 320 is threadedly connected to the lead screw. Multiple lead screws are spaced apart and connected to the support assemblies 200.

[0039] Through the transmission between the lead screw and the slider 320, precise transmission can be achieved, enabling the pressing part 400 to move accurately to the target position, thereby ensuring that the pressing part 400 is accurately pressed on the target position.

[0040] With the lead screw rotating relative to the support assembly 200, the drive slider 320 moves relative to the lead screw along the length direction of the sample 500 being tested, thereby adjusting the clamping part 400 to move relative to the sample 500 being tested to the target position.

[0041] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, the sample 500 under test includes a terminal 510 and a wire 520. The terminal 510 is connected to the wire 520. The clamping device for measuring the crimp resistance between the wire and the terminal in this application is used to determine the connection quality between the wire 520 and the terminal 510 by detecting the ratio of the resistance at the connection point between the terminal 510 and the wire 520 to the resistance of the wire 520.

[0042] Therefore, the lead screw needs to drive the slider 320 to move to the target position relative to the length of the sample 500 being measured, so as to facilitate subsequent resistance measurement.

[0043] During the measurement process, the target positions that two adjacent sliders 320 need to move to are relatively close. Therefore, it is necessary to minimize the design thickness of the sliders 320. Simultaneously, since the sliders 320 are threadedly connected to the lead screw, sufficient mating length is required between them to ensure a stable connection. Therefore, a connecting part is provided on the sliders 320. The connecting part protrudes beyond the sliders 320. A threaded hole is provided on the connecting part, penetrating both the connecting part and the sliders 320. The lead screw is threadedly connected to the threaded hole.

[0044] like Figure 1 , Figure 2 , Figure 5 As shown, the plurality of connecting parts include at least a first connecting part 321, a second connecting part 322 and a third connecting part 323.

[0045] The plurality of sliders 320 includes at least a first slider 324, a second slider 325 and a third slider 326.

[0046] The first connecting part 321 is disposed on the first slider 324.

[0047] The second connecting part 322 is provided on the second slider 325.

[0048] The third connecting part 323 is provided on the third slider 326.

[0049] The threaded hole passing through the first connecting part 321 and the first slider 324 is defined as the first threaded hole. The threaded hole passing through the second connecting part 322 and the second slider 325 is defined as the second threaded hole. The threaded hole passing through the third connecting part 323 and the third slider 326 is defined as the third threaded hole.

[0050] The multiple lead screws include at least a first lead screw 311, a second lead screw 312, and a third lead screw 313.

[0051] The first lead screw 311 is threadedly connected to the first slider 324. The second lead screw 312 is threadedly connected to the second slider 325. The third lead screw 313 is threadedly connected to the third slider 326.

[0052] The first lead screw 311 is threadedly connected to the first threaded hole. The second lead screw 312 is threadedly connected to the second threaded hole. The third lead screw 313 is threadedly connected to the third threaded hole.

[0053] In some embodiments of this application, the first slider 324 has a first clearance hole 327 to avoid the second lead screw 312 and the third lead screw 313. The second slider 325 has a second clearance hole 328 to avoid the first lead screw 311 and the third lead screw 313. The third slider 326 has a third clearance hole 329 to avoid the first lead screw 311 and the second lead screw 312. The second lead screw 312 and the third lead screw 313 pass through the first clearance hole 327. The first lead screw 311 and the third lead screw 313 pass through the second clearance hole 328. The first lead screw 311 and the second lead screw 312 pass through the third clearance hole 329.

[0054] In some embodiments of this application, the clamping device for measuring the wire and terminal crimp resistance further includes a plurality of guide portions 600. Each end of a guide portion 600 is connected to one of two support components 200. The plurality of guide portions 600 are spaced apart and connected to the two support components 200.

[0055] The plurality of guide sections 600 include at least a first guide section 610, a second guide section 620 and a third guide section 630.

[0056] The slider is provided with a sliding part, and a guide hole is provided on the sliding part; the guide hole passes through the sliding part and the slider.

[0057] The sliding part provided on the first slider 324 is defined as the first sliding part 3241, and the guide hole opened on the first sliding part 3241 is defined as the first guide hole. The sliding part provided on the second slider 325 is defined as the second sliding part 3251, and the guide hole opened on the second sliding part 3251 is defined as the second guide hole. The sliding part provided on the third slider 326 is defined as the third sliding part 3261, and the guide hole opened on the third sliding part 3261 is defined as the third guide hole; The first guide portion 610 is slidably connected to the first guide hole, the second guide portion 620 is slidably connected to the second guide hole, and the third guide portion 630 is slidably connected to the third guide hole.

[0058] The first slider 324 has a first through hole 3242. The second guide part 620 and the third guide part 630 pass through the first through hole 3242. The second guide part 620 and the third guide part 630 do not contact the first through hole 3242. The second guide part 620 and the third guide part 630 are stuck to the first slider 324.

[0059] The number of first through holes 3242 can be one or more. Multiple first through holes 3242 can respectively penetrate the second guide portion 620 and the third guide portion 630.

[0060] The second slider 325 has a second through hole 3252. The first guide part 610 and the third guide part 630 pass through the second through hole 3252. The first guide part 610 and the third guide part 630 do not contact the second through hole 3252, so as to avoid the first guide part 610, the third guide part 630 and the second slider 325 getting stuck.

[0061] The number of second through holes 3252 can be one or more. Multiple second through holes 3252 can respectively penetrate the first guide portion 610 and the third guide portion 630.

[0062] The third slider 326 has a third through hole 3262, through which the first guide part 610 and the second guide part 620 pass. The first guide part 610 and the second guide part 620 do not contact the third through hole 3262, thus preventing the first guide part 610, the second guide part 620 and the third slider 326 from getting stuck.

[0063] The number of third through holes 3262 can be one or more. Multiple third through holes 3262 can respectively penetrate the first guide portion 610 and the second guide portion 620.

[0064] In some embodiments of this application, the clamping part 400 includes a probe head and a probe spring. One end of the probe spring is connected to the output end of the transmission assembly. The probe head is connected to the other end of the probe spring. The probe head presses the sample to be tested against the base assembly.

[0065] The number of clamping parts 400 is also at least three, and the three clamping parts 400 are defined as the first clamping part, the second clamping part and the third clamping part.

[0066] The first pressing part, the second pressing part, and the third pressing part are respectively connected to the first slider 324, the second slider 325, and the third slider 326.

[0067] like Figure 6 As shown, the first pressing part includes a first probe head 411 and a first probe spring 421.

[0068] The second clamping part includes a second measuring rod head 412 and a second measuring rod spring 422.

[0069] The third clamping part includes the third measuring rod head 413 and the third measuring rod spring 423.

[0070] In some embodiments of this application, the clamping device for measuring the wire and terminal crimp resistance further includes a measuring section 700. The two ends of the measuring section 700 are respectively connected to two support assemblies 200. The measuring section 700 extends along the moving direction of the output end of the transmission assembly. The measuring section 700 is used to measure the distance between the two clamping sections 400.

[0071] To facilitate the rotation of the lead screw, a through hole is provided on the support assembly 200, and the end of the lead screw extends out of the through hole. A knob component is provided at the end of the lead screw extending out of the through hole, and the knob component can drive the lead screw to rotate.

[0072] The knob component connected to the first lead screw 311 is defined as the first knob component 3111, the knob component connected to the second lead screw 312 is defined as the second knob component 3121, and the knob component connected to the third lead screw 313 is defined as the third knob component 3131.

[0073] In other embodiments of this application, a method for using a clamping device for measuring the crimp resistance of a wire and terminal is also disclosed. The method involves using the aforementioned clamping device for measuring the crimp resistance of a wire and terminal, and includes the following steps: S1: Rotate the two support components 200 until the clamping part 400 disengages from the base assembly; S2: Place the sample 500 to be tested on the base assembly; like Figure 8 As shown, the sample to be tested 500 is connected to the power supply 530; like Figure 6 As shown, a first voltmeter 521 is connected between the first measuring rod head 411 and the second measuring rod head 412, and a second voltmeter 522 is connected between the second measuring rod head 412 and the third measuring rod head 413. S3: Referring to the data of the measuring unit 700, rotate the first knob component 3111. The first lead screw 311 drives the first slider 324 to move along the sample 500 to the first target position of the sample 500. Referring to the data of the measuring unit 700, the second knob component 3121 is rotated, and the second lead screw 312 drives the second slider 325 to move along the sample 500 to the second target position of the sample 500. Referring to the data of the measuring unit 700, the third knob component 3131 is rotated, and the third lead screw 313 drives the third slider 326 to move along the sample to the third target position of the sample 500. S4: Rotate the two support components 200 to drive the first probe head 411, the second probe head 412, and the third probe head 413 to press against the first target position, the second target position, and the third target position; contact point A is the first target position, contact point B is the second target position, and contact point C is the third target position.

[0074] The distance between contact A and contact B is equal to the distance between contact B and contact C.

[0075] The distance between contact point A and contact point D is equal to the distance between contact point D and contact point B.

[0076] Contact point A should be as close as possible to the end of wire 520 in terminal 510, but do not touch the end of wire 520; S5: Turn on power supply 530, apply test current I, and read the voltage value of the first voltmeter 521. ; Read the voltage value of the second voltmeter 522 ; crimp resistor ; Calculate the crimp resistance R and the ratio k of the crimp resistance to the resistance of a wire of the same length using the following formulas: The ratio of crimp resistance to the resistance of a wire of the same length ; —The resistance between B and C; —The resistance between A and B; —Voltage between A and B; —Voltage between B and C; —Power supply voltage; —The total current in the circuit; Measurements should be taken immediately upon connection of the test current, with each measurement lasting no more than 5 seconds. Simultaneously read... and The voltage value.

[0077] In some embodiments of this application, an insulating pad is placed on the base body 110, and the sample to be tested 500 is placed on the insulating pad.

[0078] The first probe head 411, the second probe head 412, and the third probe head 413 are all made of copper alloy material, which has good electrical conductivity.

[0079] The first slider 324, the second slider 325, and the third slider 326 are made of plastic to ensure that the first measuring rod head 411, the second measuring rod head 412, and the third measuring rod head 413 are insulated from each other. All other components are made of steel.

[0080] When using, adjust the spacing between the first measuring rod head 411, the second measuring rod head 412, and the third measuring rod head 413 according to the sample specifications.

[0081] Lift the first measuring rod head 411, the second measuring rod head 412, and the third measuring rod head 413, and press them onto the corresponding measurement points of the sample 500 to complete the clamping of the sample 500. Connect the power supply 530 and the first voltmeter 521 and the second voltmeter 522 to begin the measurement work.

[0082] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0083] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0084] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A clamping device for measuring the resistance of wire-terminal crimping, characterized in that, include: Base assembly, which is used to place the sample to be tested; Two support components are spaced apart on the base assembly, and the hinged ends of the support components are rotatably connected to the base assembly. Multiple transmission components are provided, with their fixed ends connected to the support component, and their fixed ends being spaced apart from each other on the support component. The output ends of the transmission components are movable relative to their fixed ends along the length direction of the sample being tested. The output ends of the multiple transmission components are spaced apart along the length direction of the sample being tested. Multiple clamping parts are connected to the output ends of multiple transmission components, respectively; Under the influence of gravity, the support assembly rotates around the hinge end to drive the pressing part to press the sample to be tested onto the base assembly.

2. The clamping device for measuring the crimp resistance of wires and terminals according to claim 1, characterized in that, The transmission assembly includes a lead screw and a slider. The two ends of the lead screw are rotatably connected to the support assembly, and the slider is threadedly connected to the lead screw. A plurality of lead screws are connected to the support assembly at intervals. While the lead screw is rotating relative to the support assembly, the slider moves along the length of the sample being tested.

3. The clamping device for measuring the crimp resistance of wires and terminals according to claim 2, characterized in that, It also includes multiple guide sections, each of which is connected at both ends to one of the two support components; the multiple guide sections are connected at intervals to the two support components; The slider is provided with a sliding part, and the sliding part is provided with a guide hole; the guide hole passes through the sliding part and the slider. The multiple guide portions pass through the multiple guide holes respectively, and the slider is slidably connected to the guide portions during the process of the lead screw driving the slider to move.

4. The clamping device for measuring the crimp resistance of wires and terminals according to claim 3, characterized in that, The plurality of lead screws includes at least a first lead screw, a second lead screw, and a third lead screw; the plurality of sliders includes at least a first slider, a second slider, and a third slider; the first lead screw is threadedly connected to the first slider, the second lead screw is threadedly connected to the second slider, and the third lead screw is threadedly connected to the third slider; The plurality of guide portions include at least a first guide portion, a second guide portion, and a third guide portion; The sliding part provided on the first slider is defined as the first sliding part, and the guide hole opened on the first sliding part is defined as the first guide hole; The sliding part provided on the second slider is defined as the second sliding part, and the guide hole opened on the second sliding part is defined as the second guide hole; The sliding part provided on the third slider is defined as the third sliding part, and the guide hole opened on the third sliding part is defined as the third guide hole; The first guide portion is slidably connected to the first guide hole, the second guide portion is slidably connected to the second guide hole, and the third guide portion is slidably connected to the third guide hole.

5. The clamping device for measuring the crimp resistance of wires and terminals according to claim 4, characterized in that, The first slider has a first through hole, the second guide part and the third guide part pass through the first through hole, and the second guide part and the third guide part do not contact the first through hole; The second slider has a second through hole, and the first guide part and the third guide part pass through the second through hole, but the first guide part and the third guide part do not contact the second through hole; The third slider has a third through hole, and the first guide part and the second guide part pass through the third through hole, but the first guide part and the second guide part do not contact the third through hole.

6. The clamping device for measuring the crimp resistance of wires and terminals according to claim 1, characterized in that, The clamping part includes a probe head and a probe spring. One end of the probe spring is connected to the output end of the transmission assembly, and the probe head is connected to the other end of the probe spring. The probe head presses the sample to be tested onto the base assembly.

7. The clamping device for measuring the crimp resistance of wires and terminals according to claim 1, characterized in that, It also includes a measuring part, the two ends of which are respectively connected to the two support components. The measuring part extends along the moving direction of the output end of the transmission component and is used to measure the distance between the two clamping parts.

8. The clamping device for measuring the crimp resistance of wires and terminals according to claim 1, characterized in that, The base assembly includes a base body and two support seats, with the two support seats respectively disposed on the base body; The hinged end of the support assembly is rotatably connected to the two support seats respectively; under the action of gravity of the support assembly, the support assembly rotates around the hinged end to drive the pressing part to press the sample to be tested onto the base assembly.

9. The clamping device for measuring the crimp resistance of wires and terminals according to claim 4, characterized in that, The support assembly has a through hole, and the end of the lead screw extends out of the through hole. The end of the lead screw extending out of the through hole is provided with a knob component, which can drive the lead screw to rotate. The knob component connected to the first lead screw is defined as the first knob component, the knob component connected to the second lead screw is defined as the second knob component, and the knob component connected to the third lead screw is defined as the third knob component.

10. A method of using a clamping device for measuring the resistance of wire-terminal crimping, characterized in that, The test is performed using the clamping device for measuring the crimp resistance of wires and terminals as described in claim 9, and the steps include: S1: Rotate the two support assemblies until the clamping part disengages from the base assembly; S2: Place the sample to be tested on the base assembly; Connect the sample to be tested to the power supply; The plurality of probe heads are respectively defined as a first probe head, a second probe head, and a third probe head; the plurality of probe heads A first voltmeter is connected between the first probe head and the second probe head, and a second voltmeter is connected between the second probe head and the third probe head. S3: Referring to the data from the measuring unit, rotate the first knob component, and the first lead screw drives the first slider to move along the sample to the first target position of the sample; Referring to the data from the measuring unit, the second knob component is rotated, and the second lead screw drives the second slider to move along the sample to the second target position of the sample; Referring to the data from the measuring unit, the third knob component is rotated, and the third lead screw drives the third slider to move along the sample to the third target position of the sample. S4: Rotate the two support components to press the first probe head, the second probe head, and the third probe head against the first target position, the second target position, and the third target position; S5: Turn on the power supply to apply the test current, read the voltage value of the first voltmeter, and read the voltage value of the second voltmeter.

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