Terminal fretting corrosion testing apparatus

Abstract

The application relates to the technical field of terminal testing, and provides a terminal micro-motion corrosion testing device, which comprises a mounting piece, a fixing part arranged on the mounting piece, at least one male terminal fixing groove, a female terminal fixing groove corresponding to the male terminal fixing groove, a driving part arranged on the mounting piece and used for driving the male terminal fixing groove to move along a first direction and approach the female terminal fixing groove, and a lateral displacement part rotatably arranged on the fixing part and used for changing the included angle between the lateral displacement surface and the first direction so as to make the male terminal fixing groove move along a second direction and move away from the mounting piece when the male terminal fixing groove moves along the first direction. The terminal micro-motion corrosion testing device can solve the technical problem that the test result cannot accurately reflect the corrosion resistance of the terminal because the compound micro-motion state under the real working condition cannot be restored in the prior art.

Description

Technical Field

[0001] This application relates to the field of terminal testing technology, and in particular to a terminal micro-corrosion testing device. Background Technology

[0002] Terminals (male and female terminals) are the core components of electrical connections. In actual use, they may experience minute relative movements (fretting) due to vibration, temperature changes, assembly stress, etc. Combined with moisture and pollutants in the environment, this can easily lead to "fretting corrosion"—causing oxidation and wear on the contact surface, which in turn increases contact resistance, reduces conductivity, and may even cause electrical faults.

[0003] Terminal micro-motion corrosion testing devices in related technologies typically only simulate unidirectional micro-motion (such as a small movement only along the insertion and removal direction), which cannot reproduce the complex micro-motion state under real working conditions (lateral vibration of the wiring harness and terminals caused by uneven road surfaces (such as potholes and speed bumps) when a car is driving), resulting in test results that cannot accurately reflect the corrosion resistance of the terminals. Summary of the Invention

[0004] This application provides a terminal fretting corrosion testing device, which can improve the technical problem in related technologies where the composite fretting state under real working conditions cannot be reproduced, resulting in the test results not accurately reflecting the corrosion resistance of the terminal.

[0005] This application provides a terminal fretting corrosion testing device, comprising: Installation components; The fixing part is disposed on the mounting member and has at least one male terminal fixing groove, a female terminal fixing groove corresponding to the male terminal fixing groove, a displacement receiving space, and at least one lateral displacement hole opened along the second direction and communicating with the displacement receiving space. The male terminal fixing groove is used to fix the male terminal, and the female terminal fixing groove is used to fix the female terminal. The second direction is perpendicular to the first direction. A driving unit, disposed on the mounting member and connected to the fixing unit, is used to drive the male terminal fixing groove to approach the female terminal fixing groove along the first direction; and A lateral displacement portion, located within the displacement accommodating space and rotatably disposed on the fixing portion, has a lateral displacement surface in contact with the fixing portion, and is used to change the angle between the lateral displacement surface and the first direction so that when the male terminal fixing groove moves along the first direction, the male terminal fixing groove moves away from the mounting member along the second direction.

[0006] The technical solutions described in this application embodiment have at least the following technical effects: The terminal micro-motion corrosion testing device provided in this application embodiment fixes the male terminal and the female terminal respectively through the male terminal fixing groove and the female terminal fixing groove on the fixing part. The driving part causes the male terminal fixing groove to move closer to or away from the female terminal fixing groove in the first direction through threaded transmission (simulating micro-motion in the insertion and removal direction). The fixing part contacts the lateral displacement surface of the lateral displacement part. Due to the existence of the inclined plane angle, when the male terminal fixing groove moves in the first direction, the thrust in the first direction is decomposed into a component force in the second direction, causing the male terminal fixing groove to move away from or closer to the mounting part in the second direction (generating lateral micro-motion). Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the terminal fretting corrosion testing device provided in the embodiments of this application; Figure 2 A cross-sectional view of the terminal fretting corrosion testing device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the male terminal fixing device provided in the embodiments of this application; Figure 4 for Figure 3 A cross-sectional view of the male terminal fixing device shown.

[0009] The following are the labeling elements in the figure: 100. Terminal fretting corrosion testing device; 10. Mounting component; 20. Fixing part; 21. Male terminal fixing device; 211. Guide component; 212. Male terminal fixing mechanism; 2121. Fixing support component; 21211. Displacement accommodating space; 21212. Lateral displacement hole; 21213. Displacement adjustment hole; 2122. Male terminal clamping assembly; 21221. Male terminal fixing groove; 21222. First male terminal clamping component; 21223. Second male terminal clamping component; 2123. Displacement assembly; 21 231. Fixing rod; 21232. Rotating wheel; 22. Female terminal fixing device; 221. Female terminal support; 222. First female terminal clamping member; 223. Second female terminal clamping member; 224. Female terminal fixing groove; 30. Driving part; 31. Driving device; 32. Micrometer screw device; 33. Displacement sensing device; 40. Lateral displacement part; 41. Lateral displacement device; 4111. Lateral displacement component; 4111. Lateral displacement surface; 4112. Lateral displacement groove; 412. Knob; 42. Connecting rod. Detailed Implementation

[0010] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0011] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0012] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0013] It should be understood that the terms "length", "width", "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.

[0014] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0015] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0016] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0017] Terminals (male and female terminals) are the core components of electrical connections. In actual use, they may experience minute relative movements (fretting) due to vibration, temperature changes, assembly stress, etc. Combined with moisture and pollutants in the environment, this can easily lead to "fretting corrosion"—causing oxidation and wear on the contact surface, which in turn increases contact resistance, reduces conductivity, and may even cause electrical faults.

[0018] Terminal micro-motion corrosion testing devices in related technologies typically only simulate unidirectional micro-motion (such as a small movement only along the insertion and removal direction), which cannot reproduce the complex micro-motion state under real working conditions (lateral vibration of the wiring harness and terminals caused by uneven road surfaces (such as potholes and speed bumps) when a car is driving), resulting in test results that cannot accurately reflect the corrosion resistance of the terminals.

[0019] Based on this, in order to improve the problem that the terminal fretting corrosion testing device in the related technology cannot reproduce the composite fretting state under real working conditions, resulting in the test results not being able to accurately reflect the corrosion resistance of the terminal, the embodiments of this application provide the following solution.

[0020] Please refer to the following: Figure 1 and Figure 2 This application provides a terminal fretting corrosion testing device 100, which includes a mounting part 10, a fixing part 20, a driving part 30, and a lateral displacement part 40.

[0021] The fixing part 20 is disposed on the mounting part 10 and has at least one male terminal fixing groove 21221, a female terminal fixing groove 224 corresponding to the male terminal fixing groove 21221, a displacement receiving space 21211, and at least one lateral displacement hole 21212 that communicates with the displacement receiving space 21211 and is opened along the second direction. The male terminal fixing groove 21221 is used to fix the male terminal, and the female terminal fixing groove 224 is used to fix the female terminal. The second direction is perpendicular to the first direction.

[0022] The drive unit 30 is disposed on the mounting member 10 and connected to the fixing unit 20, and is used to drive the male terminal fixing groove 21221 to approach the female terminal fixing groove 224 in the first direction.

[0023] The lateral displacement part 40 is located in the displacement receiving space 21211 and is rotatably disposed on the fixing part 20. It has a lateral displacement surface 4111 that contacts the fixing part 20. It is used to change the angle between the lateral displacement surface 4111 and the first direction so that when the male terminal fixing groove 21221 moves along the first direction, the male terminal fixing groove 21221 moves away from the mounting member 10 in the second direction.

[0024] It is understood that the mounting component 10 is used to fix the fixing part 20, the driving part 30, and the lateral displacement part 40, ensuring the relative positional accuracy of each component. For example, the material of the mounting component 10 can be aluminum alloy, stainless steel, etc., but is not limited to these.

[0025] The fixing part 20 is the mounting carrier for the male and female terminals and provides guidance for the movement of the male terminal. For example, the fixing part 20 may include a slide (linear guide slide, cross roller guide slide, etc.), a male terminal fixing platform with a male terminal fixing groove 21221 and a female terminal fixing platform with a female terminal fixing groove 224. The slide can be mounted on the mounting member 10, and the male terminal fixing platform can be movably mounted on the slide in a first direction. The driving part 30 is connected to the male terminal fixing platform and is used to drive the male terminal fixing platform to move closer to the female terminal fixing platform in the first direction so that the male terminal fixed in the male terminal fixing groove 21221 and the female terminal fixed in the female terminal fixing groove 224 can be inserted and engaged.

[0026] The drive unit 30 provides a driving force in the first direction to the fixing unit 20 via a threaded transmission, driving the male terminal fixing slot 21221 to move closer to the female terminal fixing slot 224. For example, the drive unit 30 can be a servo motor, a brushless motor, etc., but is not limited to these. The drive unit 30 can be rotatably connected to the fixing unit 20. When the drive unit 30 is working, it converts the rotational motion into linear motion through the threaded transmission, pushing the male terminal fixing slot 21221 to move smoothly along the first direction, realizing the approach or contact between the male terminal and the female terminal (simulating axial micro-movement during terminal insertion and removal).

[0027] The lateral displacement unit 40 converts the motion in the first direction into lateral displacement in the second direction through inclined surface contact and angle adjustment, simulating lateral vibration in real working conditions. The angle between the lateral displacement surface 4111 and the first direction is the angle formed by the extension of the lateral displacement surface 4111 and the first direction projected onto a plane perpendicular to the third direction (perpendicular to both the first and second directions).

[0028] As can be seen from the above, the terminal micro-motion corrosion testing device 100 provided in this application fixes the male terminal and the female terminal respectively through the male terminal fixing groove 21221 and the female terminal fixing groove 224 on the fixing part 20. The driving part 30 causes the male terminal fixing groove 21221 to move closer to or further away from the female terminal fixing groove 224 in the first direction through threaded transmission (simulating micro-motion in the insertion and removal direction). The fixing part 20 contacts the lateral displacement surface 4111 of the lateral displacement part 40. Due to the existence of the inclined plane angle, when the male terminal fixing groove 21221 moves in the first direction, the thrust in the first direction is decomposed into a component force in the second direction, causing the male terminal fixing groove 21221 to move away from or closer to the mounting part 10 in the second direction (generating lateral micro-motion).

[0029] In some embodiments, please refer to the following: Figures 3 to 4 The fixing part 20 includes a male terminal fixing device 21 and a female terminal fixing device 22.

[0030] The male terminal fixing device 21 is disposed on the mounting member 10 and has a male terminal fixing groove 21221, a lateral displacement hole 21212 and a displacement accommodating space 21211.

[0031] The female terminal fixing device 22 is disposed on the mounting part 10 and has a female terminal fixing groove 224.

[0032] The lateral displacement part 40 is disposed on the male terminal fixing device 21, and the driving part 30 is connected to the male terminal fixing device 21. The driving part 30 is used to drive the male terminal fixing device 21 to approach the female terminal fixing device 22 in the first direction. The male terminal fixing device 21 contacts the lateral displacement surface 4111. The lateral displacement part 40 is used to move the male terminal fixing groove 21221 away from the mounting member 10 in the second direction when the male terminal fixing device 21 moves in the first direction.

[0033] It is understood that the male terminal fixing device 21 achieves a compound movement of the male terminal along the first direction (approaching or moving away from the female terminal) and the second direction (laterally approaching or moving away from the mounting member 10) through mechanical linkage with the drive unit 30 and the lateral displacement unit 40. For example, the male terminal fixing device 21 can fix the male terminal through a clamping structure (such as an elastic buckle or bolt adjustment) (adapting to different specifications of terminals, with adjustable clamping force to ensure that the male terminal does not loosen during micro-movements).

[0034] The female terminal fixing device 22 is a device that can fix the female terminal and provide a reference for the composite micro-motion of the male terminal. For example, the female terminal fixing device 22 can fix the female terminal by means of a clamping structure (such as a spring clip or bolt adjustment).

[0035] With this configuration, the male terminal is fixed in the male terminal fixing groove 21221, and the female terminal is fixed in the female terminal fixing groove 224. The driving unit 30 drives the male terminal fixing device 21 to move along the first direction, causing the male terminal to gradually approach and insert into the female terminal (insertion depth greater than 1mm). During the movement of the male terminal fixing device 21 along the first direction, the male terminal fixing device 21 contacts the lateral displacement surface 4111 (the angle between the lateral displacement surface 4111 and the first direction is an acute angle), causing the horizontal force along the first direction to decompose into an upward component, thereby causing the male terminal fixing groove 21221 to move upward (in the second direction) away from the mounting part 10 along the lateral displacement hole 21212, forming a compound micro-motion. The driving unit 30 can cyclically drive the male terminal fixing groove 21221 to approach or move away from the female terminal fixing groove 224 to simulate the wear and corrosion of the contact surfaces of the male and female terminals under real working conditions. More intense vibration scenarios can be simulated by adjusting the angle between the lateral displacement surface 4111 and the first direction (the angle between the lateral displacement surface 4111 and the first direction increases, and the distance that the male terminal fixing groove 21221 moves in the second direction when it moves along the first direction increases).

[0036] In some embodiments, please refer to the following: Figures 3 to 4 The male terminal fixing device 21 includes a guide member 211 and a male terminal fixing mechanism 212.

[0037] The guide member 211 is disposed on the mounting member 10 and has a movable groove opened in a direction parallel to the first direction.

[0038] The male terminal fixing mechanism 212 has a male terminal fixing groove 21221, a lateral displacement hole 21212 and a displacement receiving space 21211, which is movably disposed on the guide member 211 and cooperates with the moving groove.

[0039] The driving unit 30 is connected to the male terminal fixing mechanism 212. The driving unit 30 is used to drive the male terminal fixing mechanism 212 to approach the female terminal fixing device 22 in the first direction. The male terminal fixing mechanism 212 contacts the lateral displacement surface 4111. The lateral displacement unit 40 is used to move the male terminal fixing groove 21221 away from the mounting member 10 in the second direction when the male terminal fixing mechanism 212 moves in the first direction.

[0040] It is understood that the guide member 211, through a moving groove parallel to the first direction, limits the male terminal fixing mechanism 212 to move only along a preset path, avoiding movement deviation caused by thread transmission deviation or lateral force of the drive part 30. For example, the guide member 211 can be a plate-like structure made of stainless steel, a plate-like structure made of aluminum alloy, etc., but is not limited to these. The moving groove can be a dovetail groove, a rectangular groove, etc., but is not limited to these. Among them, the dovetail groove is preferred because of its high bevel fitting, high guiding accuracy, and vertical self-locking (no additional limit).

[0041] The male terminal fixing mechanism 212 is a device that can both fix the male terminal and receive power from the drive unit 30, and cooperate with the lateral displacement unit 40 to achieve movement in the first direction and lateral displacement in the second direction. For example, the male terminal fixing mechanism 212 may include a first slider (copper block structure, aluminum block structure) and a terminal fixing member (clamping the terminal by elastic clamping and / or bolt fine adjustment). The first slider is movably disposed on the guide member 211 and cooperates with the moving groove, and has a lateral displacement hole 21212 and a displacement receiving space 21211. The terminal fixing member is movably disposed on the first slider through the lateral displacement hole 21212, has a male terminal fixing groove 21221, and contacts the lateral displacement surface 4111.

[0042] With this configuration, when the drive unit 30 drives the screw to rotate, the threaded transmission pushes the male terminal fixing mechanism 212 to move along the moving groove (first direction) of the guide member 211 toward the female terminal fixing device 22 and closer to the female terminal fixing device 22. When the male terminal fixing mechanism 212 moves along the first direction, the inclined lateral displacement surface 4111 decomposes the horizontal thrust into a component force perpendicular to the inclined surface, forcing the male terminal fixing groove 21221 to move laterally (away from the mounting member 10) along the guide of the lateral displacement hole 21212.

[0043] In some embodiments, please refer to the following: Figures 3 to 4 The male terminal fixing mechanism 212 includes a fixing bearing member 2121, a male terminal clamping assembly 2122, and a displacement assembly 2123.

[0044] The fixed support member 2121 has a lateral displacement hole 21212 and a displacement receiving space 21211, is movably disposed on the guide member 211, and cooperates with the moving groove.

[0045] The male terminal clamping assembly 2122 has a male terminal fixing groove 21221, is movably disposed on the fixed support member 2121 in the second direction, and is partially located in the displacement receiving space 21211 through the lateral displacement hole 21212.

[0046] The displacement assembly 2123 is located within the displacement receiving space 21211 and is connected to the portion of the male terminal clamping assembly 2122 located within the displacement receiving space 21211, and is in contact with the lateral displacement surface 4111.

[0047] The drive unit 30 is used to drive the fixed support member 2121 to approach the female terminal fixing device 22 in the first direction, and the lateral displacement unit 40 is used to move the displacement member 2123 away from the mounting member 10 in the second direction when the male terminal clamping assembly 2122 moves in the first direction.

[0048] It is understood that the fixed support member 2121 is used to receive the power of the drive unit 30 and move linearly in the first direction along the moving groove of the guide member 211, while providing installation support and movement guidance for the male terminal clamping assembly 2122 and the displacement assembly 2123. For example, the fixed support member 2121 can be a copper block structure, an aluminum block structure, etc., but is not limited to these. The drive unit 30 drives the fixed support member 2121 to move, and restricts the fixed support member 2121 to move linearly in the first direction by the moving groove. The lateral displacement hole 21212 provides guidance for the second direction movement of the male terminal clamping assembly 2122 and defines the lateral displacement path.

[0049] The male terminal clamping assembly 2122 is a device capable of fixing a male terminal through a male terminal fixing groove 21221 and moving along a lateral displacement hole 21212 (second direction). For example, the male terminal clamping assembly 2122 can be adapted to different specifications of male terminals by setting an elastic gasket in the groove and adjusting the clamping force by side bolts, but is not limited thereto.

[0050] The displacement component 2123 connects the male terminal clamping component 2122 and the lateral displacement part 40, and is used to transmit the inclined force (derived from the first direction movement) of the lateral displacement part 40 to the male terminal clamping component 2122, thereby driving the male terminal clamping component 2122 to move along the second direction. For example, the displacement component 2123 can be a copper rod-shaped structure, an aluminum rod-shaped structure, etc., but is not limited to these.

[0051] With this configuration, when the drive unit 30 is started, the screw rotates and pushes the fixed bearing member 2121 to move along the moving groove of the guide member 211 toward the female terminal fixing device 22 (first direction). The fixed bearing member 2121 drives the displacement component 2123 and the male terminal clamping component 2122 to move synchronously along the first direction. When the displacement component 2123 moves with the fixed bearing member 2121, it moves along the lateral displacement surface 4111 of the lateral displacement part 40. The oblique force of the lateral displacement surface 4111 is decomposed into a lateral force along the second direction by the displacement component 2123, which pushes the male terminal clamping component 2122 to move along the lateral displacement hole 21212 of the fixed bearing member 2121 in the second direction (away from the mounting member 10), thereby realizing lateral displacement.

[0052] For example, assuming that the driving unit 30 drives the fixed bearing member 2121 to move 1mm in the first direction, and the angle between the lateral displacement surface 4111 and the first direction is 30°, then the male terminal clamping assembly 2122 moves 0.58mm (tan30°≈0.58) in the second direction under the drive of the displacement assembly 2123, and the male terminal simultaneously generates a composite micro-motion of 1mm axial and 0.58mm lateral; if the driving unit 30 controls the fixed bearing member 2121 to make a reciprocating axial movement of ±0.1mm, the male terminal will generate a reciprocating composite micro-motion of ±0.1mm axial and ±0.058mm lateral, simulating the relative movement of the terminal under real working conditions.

[0053] In some embodiments, please refer to the following: Figures 3 to 4 The male terminal clamping assembly 2122 includes a first male terminal clamping member 21222 and a second male terminal clamping member 21223.

[0054] The first male terminal clamping member 21222 is movably disposed on the fixed bearing member 2121 in the second direction and is partially located in the displacement receiving space 21211 through the lateral displacement hole 21212.

[0055] The second male terminal clamping member 21223 is used to approach and abut against the first male terminal clamping member 21222 to form a male terminal fixing groove 21221.

[0056] The lateral displacement part 40 is used to move the first male terminal clamp 21222 away from the mounting member 10 in the second direction when the first male terminal clamp 21222 moves in the first direction.

[0057] It is understood that the first male terminal clamping member 21222 is directly connected to the displacement assembly 2123, moves along the second direction under the action of the lateral displacement part 40, and fixes the male terminal by cooperating with the second clamping member. For example, the side of the first male terminal clamping member 21222 facing the second male terminal clamping member 21223 may be provided with an arc-shaped groove, but it is not limited to this.

[0058] The second male terminal clamping member 21223 provides a stable clamping force through its cooperation with the first male terminal clamping member 21222. For example, the side of the second male terminal clamping member 21223 facing the first male terminal clamping member 21222 may be provided with an arc-shaped groove (the arc-shaped groove on the first male terminal and the arc-shaped groove on the second male terminal clamping member 21223 together form a male terminal fixing groove 21221). The clamping force and the width of the male terminal fixing groove 21221 of the second male terminal clamping member 21223 can be adjusted by elastic clamping blocks or threaded set screws, but it is not limited to this.

[0059] With this setup, in the initial preparation stage, the first male terminal clamping member 21222 and the second male terminal clamping member 21223 are separated first. Then, the male terminal is placed into the contact surface groove of the first male terminal clamping member 21222. Next, the second male terminal clamping member 21223 is brought close to and abuts against the first male terminal clamping member 21222 to form a male terminal fixing groove 21221 and ensure that the male terminal is located in the male terminal fixing groove 21221. Then, the male terminal is fixed by rotating the threaded set screw until it is tightened.

[0060] In some embodiments, please refer to the following: Figures 3 to 4 The displacement assembly 2123 includes a fixed rod 21231 and at least two rotating wheels 21232.

[0061] The fixing rod 21231 is located within the displacement receiving space 21211 and is connected to the portion of the male terminal clamping assembly 2122 located within the displacement receiving space 21211.

[0062] Two rotating wheels 21232 are rotatably disposed at both ends of the fixed rod 21231 along a direction perpendicular to the first direction and the second direction, and are in contact with the lateral displacement surface 4111.

[0063] The lateral displacement part 40 is used to move the fixing rod 21231 away from the mounting member 10 in the second direction when the fixing rod 21231 moves in the first direction.

[0064] It is understood that the fixing rod 21231 connects the male terminal clamping assembly 2122 and the rotating wheel 21232, rigidly transmitting the lateral force received by the rotating wheel 21232 to the clamping assembly, while ensuring the coaxiality and symmetrical distribution of the two rotating wheels 21232. For example, the fixing rod 21231 can be a stainless steel rod, an aluminum alloy rod, etc., but is not limited to these.

[0065] The rotating wheel 21232 is in direct contact with the lateral displacement surface 4111 of the lateral displacement section 40. Through rolling contact, the linear motion in the first direction is converted into rolling along the lateral displacement surface 4111, thereby decomposing the lateral force in the second direction. For example, the rotating wheel 21232 can be an engineering plastic wheel, a ceramic wheel, etc., but is not limited to these.

[0066] With this configuration, in the initial contact state, the fixing rod 21231 drives the double rotating wheels 21232 to make close contact with the lateral displacement surface 4111 (with an included angle of 30°) of the lateral displacement part 40. The rotating wheels 21232 are stationary, and the male terminal clamping assembly 2122 does not generate lateral displacement. When the driving part 30 drives the fixing support member 2121 to move closer to the female terminal fixing device 22 along the first direction, the fixing support member 2121 drives the displacement assembly 2123 to move synchronously closer to the female terminal fixing device 22 along the first direction. The thrust in the first direction causes the rotating wheels 21232 to begin rolling upward along the lateral displacement surface 4111 of the lateral displacement part 40. The lateral force along the lateral displacement surface 4111 is rigidly transmitted by the fixing rod 21231 to the male terminal clamping assembly 2122, pushing the male terminal clamping assembly 2122 to move along the second direction (vertically upward); when the driving part 30 drives the fixed bearing member 2121 away from the female terminal fixing device 22 along the first direction, the fixed bearing member 2121 drives the displacement assembly 2123 to move away from the female terminal fixing device 22 in the first direction at the same time. The tension in the first direction causes the rotating wheel 21232 to start rolling downward along the lateral displacement surface 4111 of the lateral displacement part 40, thereby driving the male terminal clamping assembly 2122 to move along the second direction (vertically downward).

[0067] In some embodiments, please refer to the following: Figures 3 to 4 The female terminal fixing device 22 includes a female terminal support 221, a first female terminal clamping member 222, and a second female terminal clamping member 223.

[0068] The female terminal support 221 is mounted on the mounting component 10.

[0069] The first female terminal clamping member 222 is disposed on the female terminal support member 221.

[0070] The second female terminal clamping member 223 is used to approach and abut against the first female terminal clamping member 222 to form a female terminal fixing groove 224.

[0071] It is understood that the female terminal support 221 is a support structure. For example, the female terminal support 221 can be a copper support frame, an aluminum support frame, etc., but is not limited to these.

[0072] The first female terminal clamping member 222 fixes the female terminal by cooperating with the second clamping member. The height of the first female terminal clamping member 222 can be adjusted to facilitate the insertion and removal of the male and female terminals. For example, the side of the first female terminal clamping member 222 facing the second female terminal clamping member 223 may be provided with an arc-shaped groove, but it is not limited to this.

[0073] The second female terminal clamping member 223 provides a stable clamping force through its cooperation with the first female terminal clamping member 222. For example, the side of the second female terminal clamping member 223 facing the first female terminal clamping member 222 may be provided with an arc-shaped groove (the arc-shaped groove on the first female terminal and the arc-shaped groove on the second female terminal clamping member 223 together form a female terminal fixing groove 224). The clamping force and the width of the female terminal fixing groove 224 of the second female terminal clamping member 223 can be adjusted by elastic clamping blocks or threaded set screws, but it is not limited to this.

[0074] With this setup, in the initial preparation stage, the first female terminal clamping member 222 and the second female terminal clamping member 223 are separated first. Then, the female terminal is placed in the contact surface groove of the first female terminal clamping member 222. Next, the second female terminal clamping member 223 is brought close to and abuts against the first female terminal clamping member 222 to form a female terminal fixing groove 224 and ensure that the female terminal is located in the female terminal fixing groove 224. Then, the female terminal is fixed by rotating the threaded set screw until it is tightened.

[0075] In some embodiments, please refer to the following: Figures 3 to 4 The drive unit 30 includes a drive device 31, a micrometer screw device 32, and a displacement sensor 33.

[0076] The drive unit 31 is mounted on the mounting component 10.

[0077] One end of the micrometer screw gauge 32 is connected to the rotating shaft of the drive device 31, and the other end is connected to the fixing part 20.

[0078] The displacement sensing device 33 is mounted on the mounting part 10 and connected to the fixing part 20.

[0079] The driving device 31 is used to drive the micrometer screw 32 to rotate so that the male terminal fixing groove 21221 moves closer to the female terminal fixing groove 224 along the first direction, and the displacement sensing device 33 is used to record the displacement of the male terminal fixing groove 21221 when it moves.

[0080] It can be understood that the drive device 31 is a device capable of driving the micrometer screw gauge 32 to rotate. For example, the drive device 31 can be a servo motor, a two-phase stepper motor, etc., but is not limited to these.

[0081] The micrometer screw gauge 32 converts the rotational power of the drive device 31 into linear motion of the fixed part 20 along a first direction via a threaded drive. For example, the micrometer head of the micrometer screw gauge 32 can be rotatably connected to the fixed support 2121. One rotation of the micrometer head of the micrometer screw gauge 32 advances or retracts 500µm. During the test, the drive device 31 drives the micrometer head to rotate one-tenth of a rotation (5 divisions), thus achieving the 50µm displacement test requirement. The drive device 31 can be connected to the micrometer screw gauge 32 via a coupling (to compensate for the coaxiality error between the rotation shaft of the drive device 31 and the micrometer screw gauge 32, avoiding transmission jamming or component wear caused by rigid connection).

[0082] The displacement sensing device 33 directly acquires the actual displacement data of the fixed part 20 (fixed bearing 2121) along the first direction, thereby providing data support for plotting the curve of terminal contact resistance changing with terminal displacement. For example, the displacement sensing device 33 can be a grating ruler, an inductive displacement sensor, etc., but is not limited to these.

[0083] With this configuration, the drive device 31 drives the micrometer screw gauge 32 to rotate (clockwise) to push the male terminal fixing mechanism 212 towards the female terminal fixing device 22 along the first direction. Conversely, the drive device 31 drives the micrometer screw gauge 32 to rotate in the opposite direction (counterclockwise) to pull the male terminal fixing mechanism 212 away from the female terminal fixing device 22 along the first direction. The displacement sensing device 33 monitors the displacement in real time during the movement of the male terminal fixing mechanism 212 to obtain displacement data.

[0084] In some embodiments, please refer to the following: Figures 3 to 4 The lateral displacement section 40 includes two lateral displacement devices 41 and a connecting rod 42.

[0085] Two lateral displacement devices 41 are located within the displacement receiving space 21211 and are rotatably mounted on both sides of the fixing part 20 in a direction perpendicular to the first direction and the second direction. The portion of the lateral displacement device 41 located within the displacement receiving space 21211 is provided with a lateral displacement groove 4112, and the lateral displacement groove 4112 has a lateral displacement surface 4111.

[0086] The connecting rod 42 is located in the displacement receiving space 21211, and its two ends are respectively connected to the lateral displacement device 41, which is used to drive the other lateral displacement device 41 to rotate synchronously when one lateral displacement device 41 rotates.

[0087] It can be understood that the lateral displacement device 41 contacts the rotating wheel 21232 through the lateral displacement surface 4111 (inclined surface) of the lateral displacement groove 4112, converting the first direction movement into a lateral force (second direction). For example, the lateral displacement device 41 may also include a locking bolt, which can prevent the lateral displacement device 41 from rotating by tightening the locking bolt, but is not limited to this.

[0088] The connecting rod 42 eliminates angular deviations between the two sides of the device through rigid connection, avoiding uneven lateral displacement caused by asynchronous rotation on one side. For example, the connecting rod 42 can be a copper rod-shaped structure, an aluminum rod-shaped structure, etc., but is not limited to these.

[0089] With this configuration, when the fixed support member 2121 approaches the female terminal fixing device 22 along the first direction, the rotating wheel 21232 is abutted by the lateral displacement surface 4111. The thrust in the first direction is transmitted through the rotating wheel 21232 to the lateral displacement surface 4111 and decomposed into a lateral force along the second direction, pushing the rotating wheel 21232 away from the mounting member 10 along the second direction. This causes the displacement assembly 2123 and the male terminal clamping assembly 2122 to move away from the mounting member 10 along the second direction, thereby achieving lateral displacement of the male terminal fixed in the male terminal fixing groove 21221. By rotating the lateral displacement device 41, the angle between the lateral displacement surface 4111 and the first direction can be changed, thereby adjusting the lateral displacement distance of the male terminal.

[0090] In some embodiments, please refer to the following: Figures 3 to 4 The fixed part 20 is provided with displacement adjustment holes 21213, and the lateral displacement device 41 includes a lateral displacement component 411 and a knob 412.

[0091] The lateral displacement member 411 is located in the displacement receiving space 21211 and is rotatably disposed on one side of the fixing part 20 along the direction perpendicular to the first direction and the second direction, and has a lateral displacement groove 4112.

[0092] The knob 412 is connected to the lateral displacement member 411 through the displacement adjustment hole 21213, and is used to drive the lateral displacement member 411 to rotate so as to change the angle between the lateral displacement surface 4111 and the first direction.

[0093] It is understood that the lateral displacement element 411 controls the lateral micro-motion amplitude through angular changes. For example, the lateral displacement element 411 can be a cylindrical structure made of copper, a cylindrical structure made of aluminum, etc., but is not limited to these.

[0094] The knob 412 is an interactive component for the tester to adjust the angle of the lateral displacement surface 4111. For example, the knob 412 can be cylindrical with a non-slip texture and a knurled outer surface to facilitate manual rotation by the tester without the need for tools. An angle scale can be engraved on the top or side of the knob 412. The knob 412 can also integrate a locking nut, which can be tightened to fix the angle of the lateral displacement component 411 and prevent angle deviation caused by vibration during testing.

[0095] With this configuration, the rotational torque is transmitted to the lateral displacement component 411 via the rotating knob 412, thereby achieving angle adjustment to realize lateral displacement of different distances according to test requirements.

[0096] In some embodiments, the terminal fretting corrosion testing apparatus 100 further includes a resistance measuring device.

[0097] The resistance measuring device can be mounted on the mounting part 10 and connected to the male terminal on the male terminal fixing slot 21221 and the female terminal on the female terminal fixing slot 224 respectively. It is used to apply current to measure the contact resistance of the male terminal and the female terminal when the male terminal on the male terminal fixing slot 21221 and the corresponding female terminal on the female terminal fixing slot 224 are connected to each other.

[0098] It is understandable that resistance measuring devices convert microscopic corrosion phenomena into quantifiable electrical parameters by monitoring the resistance changes at the contact interface between male and female terminals in real time. For example, resistance measuring devices can be loop resistance testers, precision DC low resistance testers, etc., but are not limited to these.

[0099] This setup allows for precise capture of minute fluctuations in contact resistance during continuous micro-motion contact between the male and female terminals using a resistance measuring device, providing direct data support for analyzing the correlation between the amplitude and frequency of micro-motion and the degree of corrosion.

[0100] For example, when testing male and female terminals, the male and female terminals to be tested are first fixed in the corresponding male terminal fixing slot 21221 and female terminal fixing slot 224, respectively. Then, the lateral displacement part 40 is rotated so that the lateral displacement surface 4111 is perpendicular to the first direction (the angle between the lateral displacement surface 4111 and the first direction is equal to 90°). Then, the male terminal fixing mechanism 212 is driven by the driving part 30 to approach and insert into the female terminal along the first direction (the insertion depth is greater than 1 mm and does not touch the rear structure of the female terminal). After that, the lateral displacement part 40 is rotated. The displacement unit 40 makes the angle between the lateral displacement surface 4111 and the first direction less than 90° (the specific angle can be calculated based on the required lateral micro-motion distance and the micro-motion distance along the first direction), and connects the resistance measuring device to each male and female terminal and ensures that the circuit is normal (current load ≤20mV, ≤10mA). Then, the drive unit 30 drives the male terminal fixing mechanism 212 to perform reciprocating micro-motion along the first direction at a micro-motion frequency of 1HZ, a micro-motion distance of 50μm (first direction), and a micro-motion number of 100,000 times.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A terminal fretting corrosion testing device, characterized in that, include: Installation components; The fixing part is disposed on the mounting member and has at least one male terminal fixing groove, a female terminal fixing groove corresponding to the male terminal fixing groove, a displacement receiving space, and at least one lateral displacement hole opened along the second direction and communicating with the displacement receiving space. The male terminal fixing groove is used to fix the male terminal, and the female terminal fixing groove is used to fix the female terminal. The second direction is perpendicular to the first direction. A driving unit, disposed on the mounting member and connected to the fixing unit, is used to drive the male terminal fixing groove to approach the female terminal fixing groove along the first direction; and A lateral displacement portion is located within the displacement accommodating space and rotatably disposed on the fixing portion. It has a lateral displacement surface that contacts the fixing portion and is used to change the angle between the lateral displacement surface and the first direction so that when the male terminal fixing groove moves along the first direction, the male terminal fixing groove moves away from the mounting member along the second direction. The fixing part includes: A male terminal fixing device, disposed on the mounting member, includes the male terminal fixing groove, the lateral displacement hole, and the displacement accommodating space; and A female terminal fixing device is disposed on the mounting component and has the female terminal fixing groove; The lateral displacement part is disposed on the male terminal fixing device, the driving part is connected to the male terminal fixing device, the driving part is used to drive the male terminal fixing device to approach the female terminal fixing device along the first direction, the male terminal fixing device is in contact with the lateral displacement surface, and the lateral displacement part is used to cause the male terminal fixing groove to move away from the mounting member along the second direction when the male terminal fixing device moves along the first direction; The male terminal fixing device includes: A guide member, disposed on the mounting member, has a movable groove formed along a direction parallel to the first direction; and The male terminal fixing mechanism has the male terminal fixing groove, the lateral displacement hole and the displacement receiving space, and is movably disposed on the guide member and cooperates with the moving groove; The driving unit is connected to the male terminal fixing mechanism. The driving unit is used to drive the male terminal fixing mechanism to approach the female terminal fixing device along the first direction. The male terminal fixing mechanism is in contact with the lateral displacement surface. The lateral displacement unit is used to move the male terminal fixing groove away from the mounting member along the second direction when the male terminal fixing mechanism moves along the first direction. The male terminal fixing mechanism includes: A fixed support member, having the lateral displacement hole and the displacement accommodating space, is movably disposed on the guide member and cooperates with the moving groove; A male terminal clamping assembly, having the male terminal fixing groove, is movably disposed on the fixing support member along the second direction and partially located within the displacement receiving space via the lateral displacement hole; and The displacement assembly is located within the displacement receiving space and connected to the portion of the male terminal clamping assembly located within the displacement receiving space, and is in contact with the lateral displacement surface; The displacement component includes: A fixing rod, located within the displacement receiving space and connected to the portion of the male terminal clamping assembly located within the displacement receiving space; and At least two rotating wheels are rotatably disposed at both ends of the fixed rod along a direction perpendicular to the first direction and perpendicular to the second direction, and are in contact with the lateral displacement surface; The lateral displacement portion is used to move the fixed rod away from the mounting member in the second direction when the fixed rod moves in the first direction; The driving part is used to drive the fixed support member to approach the female terminal fixing device along the first direction. The lateral displacement part is used to convert the linear motion in the first direction into rolling along the lateral displacement surface by the rolling contact between the rotating wheel and the lateral displacement surface of the lateral displacement part when the male terminal clamping assembly moves along the first direction. This decomposes the lateral force along the second direction, thereby pushing the male terminal clamping assembly away from the mounting member along the second direction under the constraint of the lateral displacement hole of the fixed support member.

2. The terminal fretting corrosion testing device as described in claim 1, characterized in that, The male terminal clamping assembly includes: The first male terminal clamping member is movably disposed on the fixed support member along the second direction and partially located within the displacement receiving space through the lateral displacement hole; and The second male terminal clamping member is used to approach and abut against the first male terminal clamping member to form the male terminal fixing groove; The lateral displacement portion is used to move the first male terminal clamping member away from the mounting member in the second direction when the first male terminal clamping member moves in the first direction.

3. The terminal fretting corrosion testing device as described in claim 1, characterized in that, The female terminal fixing device includes: A female terminal support is disposed on the mounting component; A first female terminal clamping member is disposed on the female terminal support member; and The second female terminal clamping member is used to approach and abut against the first female terminal clamping member to form the female terminal fixing groove.

4. The terminal fretting corrosion testing device as described in claim 1, characterized in that, The drive unit includes: A drive unit is mounted on the mounting component; A micrometer screw gauge, one end of which is connected to the rotating shaft of the drive device, and the other end of which is connected to the fixing part; and A displacement sensing device is mounted on the mounting component and connected to the fixing part; The driving device is used to drive the micrometer screw to rotate so that the male terminal fixing slot moves closer to the female terminal fixing slot along the first direction, and the displacement sensing device is used to record the displacement of the male terminal fixing slot when the male terminal fixing slot moves.

5. The terminal fretting corrosion testing device as described in claim 1, characterized in that, The lateral displacement portion includes: Two lateral displacement devices are partially located within the displacement receiving space and are rotatably disposed on both sides of the fixed portion along a direction perpendicular to both the first and second directions. The portion of each lateral displacement device located within the displacement receiving space has a lateral displacement groove, and the lateral displacement groove has the lateral displacement surface. A connecting rod is located within the displacement accommodating space, with its two ends connected to the lateral displacement devices, and is used to drive the other lateral displacement device to rotate synchronously when one of the lateral displacement devices rotates.

6. The terminal fretting corrosion testing device as described in claim 1, characterized in that, The terminal fretting corrosion testing device also includes: A resistance measuring device is mounted on the mounting component and connected to the male terminal on the male terminal fixing slot and the female terminal on the female terminal fixing slot, respectively, for measuring the contact resistance when the male terminal on the male terminal fixing slot is in contact with the corresponding female terminal on the female terminal fixing slot.

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