A probe finger wear test fixture

Abstract

The utility model relates to wear and tear measurement technical field especially is related to a kind of contact finger wear resistance test tool.The device includes temperature adjusting mechanism and drive mechanism;Temperature adjusting mechanism includes temperature adjusting support;Temperature adjusting support is used to carry the contact finger to be tested, and is configured to be able to adjust the temperature of contact finger;Drive mechanism includes matching conductor;Matching conductor is configured to be able to slide along the surface of contact finger, to form sliding contact with the contact finger after temperature adjustment by temperature adjusting support.The contact finger wear resistance test tool provided by the utility model is used, the temperature of contact finger is carried and adjusted by temperature adjusting support, after the temperature of contact finger is adjusted to set threshold, matching conductor slides along the surface of contact finger, to make matching conductor form sliding contact with the contact finger after temperature adjustment by temperature adjusting support, to solve the problem that significant temperature rise is generated due to contact resistance and joule heat effect in the process of electrifying because of contact finger, leading to the problem that wear resistance test result is difficult to accurately reflect the wear characteristics of contact finger.

Description

Technical Field

[0001] This utility model relates to the field of wear measurement technology, and in particular to a finger wear resistance testing fixture. Background Technology

[0002] A contact finger is an electrical contact element used to realize the functions of current transmission and circuit switching. It forms a surface contact or line contact with a mating conductor through its own elastic deformation, so as to establish a low-resistance and high-stability conductive path when energized.

[0003] In actual operation, in order to maintain reliable electrical contact performance under complex working conditions, the contact fingers should also have sufficient elastic recovery ability, wear resistance and arc erosion resistance to ensure contact stability and safety during long-term operation.

[0004] To ensure the wear resistance of the contact fingers, random sampling tests are required within the same batch of contact fingers. When conducting wear resistance tests on existing contact fingers, the contact fingers are driven by a drive mechanism to make reciprocating sliding contact with the mating conductor, so as to simulate the mechanical friction process of the contact fingers in actual operation.

[0005] However, due to the contact resistance and Joule heating effect, the contact finger will generate a significant temperature rise during the energization process, which will cause changes in the material hardness, elastic modulus and surface oxidation state, making it difficult for the wear resistance test results to accurately reflect the wear characteristics of the contact finger. Utility Model Content

[0006] This invention provides a tooling for testing the wear resistance of a finger, which solves the problem that the wear resistance test results cannot accurately reflect the wear characteristics of the finger because the finger will generate a significant temperature rise during the energization process due to contact resistance and Joule heating effect, which causes changes in the material hardness, elastic modulus and surface oxidation state.

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0008] A finger abrasion resistance testing fixture:

[0009] It includes a temperature control mechanism and a drive mechanism; the temperature control mechanism includes a temperature control bracket; the temperature control bracket is used to support the finger to be tested and is configured to adjust the temperature of the finger; the drive mechanism includes a mating conductor; the mating conductor is configured to slide along the surface of the finger to form a sliding contact with the finger after it has been temperature-controlled by the temperature control bracket.

[0010] Furthermore, the temperature control mechanism also includes a conductor temperature control structure; the conductor temperature control structure is disposed on the insertion path of the mating conductor and is used to adjust the temperature of the mating conductor before it comes into contact with the finger.

[0011] Furthermore, the drive mechanism has a reciprocating mode and a unidirectional circulation mode; when the drive mechanism is in reciprocating mode, the mating conductor slides back and forth with the finger to simulate the friction behavior during the insertion and removal of the finger; when the drive mechanism is in unidirectional circulation mode, the mating conductor slides back and forth with the finger along the insertion or removal direction to amplify the wear during the insertion or removal of the finger.

[0012] Furthermore, the drive mechanism also includes a conveyor belt; the conveyor belt is connected to the mating conductor and is used to drive the mating conductor to move; when the drive mechanism is in reciprocating mode, the conveyor belt moves back and forth to drive the mating conductor to reciprocate sliding contact with the finger; when the drive mechanism is in unidirectional cycle mode, the conveyor belt moves cyclically to drive the mating conductor to cyclically slide contact with the finger.

[0013] Furthermore, the temperature control mechanism also includes a finger temperature control structure; the finger temperature control structure includes the temperature control bracket, a heat exchange tube, and a circulation pump; the heat exchange tube is connected to the side of the temperature control bracket away from the finger to be tested; the circulation pump is connected to the heat exchange tube and is used to drive the liquid heat exchange medium to flow through the heat exchange tube to exchange heat with the temperature control bracket.

[0014] Furthermore, the conductor temperature control structure includes a temperature control nozzle; the outlet of the temperature control nozzle faces the insertion path of the mating conductor and is configured to output a gaseous heat exchange medium to regulate the temperature of the mating conductor through heat exchange.

[0015] Furthermore, the temperature control mechanism also includes a medium supply structure; the medium supply structure includes a liquid storage tank and an electric heating rod; the liquid outlet of the liquid storage tank is connected to the inlet of the circulating pump, and the liquid inlet is connected to the outlet of the heat exchange tube; the electric heating rod is installed inside the liquid storage tank and is used to heat the liquid heat exchange medium inside the liquid storage tank.

[0016] Furthermore, the medium supply structure also includes multiple heat exchange tubes and a drive fan;

[0017] The outlet of the heat exchange tube is connected to the inlet of the temperature-regulating nozzle, and its inlet is connected to the outlet of the drive fan; the heat exchange tube is inserted into the liquid storage tank to be immersed in the liquid heat exchange medium, and is used to transfer the heat of the liquid heat exchange medium to the gaseous heat exchange medium.

[0018] Furthermore, the temperature control bracket is configured to adjust its vertical mounting position to adjust the distance of the touch finger relative to the mating conductor in the vertical direction.

[0019] Furthermore, the temperature-adjusting nozzle is configured to adjust its horizontal mounting position to adjust the distance of the temperature-adjusting nozzle relative to the touch finger in the horizontal direction, thereby adjusting the heating position of the mating conductor.

[0020] The beneficial effects of this utility model workpiece touch finger wear resistance testing fixture are analyzed as follows:

[0021] The device includes a temperature control mechanism and a drive mechanism; the temperature control mechanism includes a temperature control bracket; the temperature control bracket is used to support the finger to be tested and is configured to adjust the temperature of the finger; the drive mechanism includes a mating conductor; the mating conductor is configured to slide along the surface of the finger to form a sliding contact with the finger after it has been temperature-controlled by the temperature control bracket.

[0022] The finger wear resistance testing fixture provided by this utility model uses a temperature-regulating bracket to support and adjust the temperature of the finger. After the finger temperature is adjusted to a set threshold, the mating conductor slides along the finger surface so that the mating conductor and the finger, which has been regulated by the temperature-regulating bracket, form a sliding contact. This solves the problem that the wear resistance test results are difficult to accurately reflect the wear characteristics of the finger due to the significant temperature rise caused by the contact resistance and Joule heating effect during the energization process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of the finger abrasion resistance testing fixture provided in this embodiment of the utility model;

[0025] Figure 2 Rear view of the finger abrasion resistance testing fixture provided in this embodiment of the utility model;

[0026] Figure 3 A cross-sectional view of the finger abrasion resistance testing fixture provided in this embodiment of the utility model;

[0027] Figure 4 A schematic diagram of the touch-sensitive temperature control structure provided in this embodiment of the utility model;

[0028] Figure 5 A schematic diagram of the conductor temperature regulation structure provided in this embodiment of the utility model;

[0029] Figure 6 This invention provides a three-dimensional exploded view of the medium supply structure according to an embodiment of the present invention.

[0030] icon:

[0031] 100-Temperature control mechanism; 110-Touch temperature control structure; 111-Temperature control bracket; 112-Heat exchange tube; 113-Circulating pump; 120-Conductor temperature control structure; 121-Temperature control nozzle; 122-Locking nut; 130-Media supply structure; 131-Liquid storage tank; 132-Electric heating rod; 133-Heat exchange tube; 134-Drive fan; 135-Parallel conduit; 200-Drive mechanism; 210-Matching conductor; 220-Conveyor belt; 230-Bearing bracket; 231-Vertical strip hole; 232-Horizontal strip hole; 240-Drive roller; 250-Driven roller; 260-Drive motor; 270-Support bracket. Detailed Implementation

[0032] Because the contact resistance and Joule heating effect cause a significant temperature rise in the finger during the energization process, the material hardness, elastic modulus and surface oxidation state change, making it difficult for the wear resistance test results to accurately reflect the wear characteristics of the finger.

[0033] In view of this, this solution provides a finger abrasion resistance testing fixture, including a temperature control mechanism 100 and a drive mechanism 200.

[0034] The following combination Figures 1-6 The structure and shape of the finger abrasion test fixture are described in detail:

[0035] The temperature control mechanism 100 includes a temperature control bracket 111; the temperature control bracket 111 is used to support the finger to be tested and is configured to adjust the temperature of the finger; the drive mechanism 200 includes a mating conductor 210; the mating conductor 210 is configured to slide along the surface of the finger to form a sliding contact with the finger after the temperature control bracket 111 has adjusted the temperature.

[0036] In this embodiment, the temperature of the touch finger is supported and adjusted by the temperature-adjusting bracket 111. After the touch finger temperature is adjusted to a set threshold, the mating conductor 210 slides along the surface of the touch finger so that the mating conductor 210 and the touch finger after the temperature is adjusted by the temperature-adjusting bracket 111 form a sliding contact, thereby simulating the mechanical friction between the touch finger and the mating conductor 210 after the temperature rise.

[0037] To simulate the temperature rise of the conductor 210 during the energizing process:

[0038] like Figure 3 As shown, the temperature control mechanism 100 also includes a conductor temperature control structure 120; the conductor temperature control structure 120 is disposed on the insertion path of the mating conductor 210 and is used to adjust the temperature of the mating conductor 210 before it comes into contact with the finger.

[0039] In this embodiment, by setting the conductor temperature regulating structure 120 on the insertion path of the mating conductor 210, the temperature of the mating conductor 210 before contact with the finger is adjusted, thereby simulating the temperature rise of the mating conductor 210 during the energization process and further enhancing the accuracy of the wear resistance test results.

[0040] In order to simulate the mechanical friction process of the finger according to the requirements:

[0041] like Figure 1 As shown, the drive mechanism 200 has a reciprocating mode and a unidirectional circulation mode. When the drive mechanism 200 is in the reciprocating mode, the cooperating conductor 210 slides back and forth with the finger to simulate the friction behavior during the insertion and removal of the finger. When the drive mechanism 200 is in the unidirectional circulation mode, the cooperating conductor 210 slides back and forth with the finger along the insertion direction or the removal direction to amplify the wear during the insertion or removal of the finger.

[0042] In this embodiment, when it is necessary to simulate the mechanical friction of the finger during the insertion and removal process, the drive mechanism 200 is set to reciprocating mode, and the conductor 210 reciprocates and slides in contact with the finger to simulate the friction behavior during the insertion and removal process.

[0043] When it is necessary to observe the wear during the insertion or removal of the finger, the drive mechanism 200 is set to a one-way circulation mode. The cooperating conductor 210 slides in contact with the finger in the insertion or removal direction to amplify the wear during the insertion or removal of the finger.

[0044] To drive the mating conductor 210 to reciprocate or cyclically slide in contact with the contact finger:

[0045] like Figure 3 As shown, the drive mechanism 200 also includes a conveyor belt 220; the conveyor belt 220 is connected to the mating conductor 210 and is used to drive the mating conductor 210 to move; when the drive mechanism 200 is in reciprocating mode, the conveyor belt 220 moves back and forth to drive the mating conductor 210 to reciprocate sliding contact with the finger; when the drive mechanism 200 is in unidirectional cycle mode, the conveyor belt 220 moves cyclically to drive the mating conductor 210 to cyclically slide contact with the finger.

[0046] To drive conveyor belt 220 to move:

[0047] like Figure 3As shown, the drive mechanism 200 also includes a support bracket 230, a drive roller 240, a driven roller 250, and a drive motor 260; the drive roller 240 and the driven roller 250 are both rotatably mounted on the support bracket 230; the drive roller 240 is connected to the driven roller 250 via a conveyor belt 220; the drive motor 260 is mounted on the support bracket 230, and its rotation shaft is connected to the drive roller 240 via a transmission component, the type of which includes, but is not limited to, synchronous belt sets and gear sets.

[0048] To avoid the impact of the conveyor belt's 220 elastic deformation on the inspection:

[0049] like Figure 3 As shown, the drive mechanism 200 also includes a support bracket 270; the support bracket 270 is connected to the support bracket 230 and is in contact with the side of the conveyor belt 220 facing away from the mating conductor 210, so as to provide support during the sliding contact between the mating conductor 210 and the touch finger.

[0050] In this embodiment, when the drive mechanism 200 is in reciprocating mode, the drive motor 260 drives the drive roller 240 to reciprocate around its own axis through the transmission component. The drive roller 240 drives the conveyor belt 220 to reciprocate under the cooperation of the driven roller 250, thereby driving the mating conductor 210 to reciprocate and rub against the touch finger.

[0051] When the drive mechanism 200 is in unidirectional circulation mode, the drive motor 260 drives the drive roller 240 to rotate around its own axis through the transmission component. With the cooperation of the driven roller 250, the drive roller 240 drives the conveyor belt 220 to move cyclically, thereby driving the mating conductor 210 to slide in contact with the touch finger in a cyclic manner.

[0052] To achieve temperature regulation of the fingers:

[0053] like Figure 1 and Figure 4 As shown, the temperature control mechanism 100 also includes a finger temperature control structure 110; the finger temperature control structure 110 includes a temperature control bracket 111, a heat exchange tube 112 and a circulation pump 113; the heat exchange tube 112 is connected to the side of the temperature control bracket 111 away from the finger to be tested; the circulation pump 113 is connected to the heat exchange tube 112 and is used to drive the liquid heat exchange medium to flow through the heat exchange tube 112 to exchange heat with the temperature control bracket 111.

[0054] In order to regulate the temperature of the mating conductor 210:

[0055] like Figure 1 and Figure 5As shown, the conductor temperature control structure 120 includes a temperature control nozzle 121; the outlet of the temperature control nozzle 121 faces the insertion path of the mating conductor 210 and is configured to output a gaseous heat exchange medium to regulate the temperature of the mating conductor 210 through heat exchange.

[0056] In order to provide a liquid heat exchange medium to the touch-sensitive temperature control structure 110:

[0057] like Figure 1 and Figure 6 As shown, the temperature control mechanism 100 also includes a medium supply structure 130; the medium supply structure 130 includes a liquid storage tank 131 and an electric heating rod 132; the liquid outlet of the liquid storage tank 131 is connected to the inlet of the circulating pump 113, and the liquid inlet is connected to the outlet of the heat exchange tube 112; the electric heating rod 132 is installed in the liquid storage tank 131 and is used to heat the liquid heat exchange medium in the liquid storage tank 131.

[0058] To provide a gaseous heat-conducting medium to the conductor temperature-regulating structure 120:

[0059] like Figure 1 and Figure 6 The medium supply structure 130 shown also includes multiple heat exchange tubes 133 and a drive fan 134; the outlet of the heat exchange tube 133 is connected to the inlet of the temperature-regulating nozzle 121, and its inlet is connected to the outlet of the drive fan 134; the heat exchange tube 133 is inserted into the liquid storage tank 131 to be immersed in the liquid heat exchange medium, and is used to transfer the heat of the liquid heat exchange medium to the gaseous heat exchange medium.

[0060] To increase the amount of gaseous heat exchange medium supplied by the medium supply structure 130:

[0061] like Figure 6 As shown, the medium supply structure 130 includes two drive fans 134 and parallel conduits 135; multiple heat exchange tubes 133 are divided into two groups and symmetrically arranged with the electric heating rod 132 as the center; the two ends of the parallel conduits 135 are respectively connected to the outlets of the two groups of heat exchange tubes 133; the inlet of the temperature regulating nozzle 121 is connected to the parallel conduits 135.

[0062] In this embodiment, the liquid heat exchange medium in the storage tank 131 is heated to a set temperature by the electric heating rod 132. Then, the circulation pump 113 drives the liquid heat exchange medium in the storage tank 131 to enter the heat exchange tube 112 through the circulation pump 113. The liquid heat exchange medium in the heat exchange tube 112 exchanges heat with the touch finger through the heat exchange tube 112 and the temperature adjustment bracket 111, thereby adjusting the temperature of the touch finger to the set range. The liquid heat exchange medium that has completed the heat exchange enters the storage tank 131 for heating and recycling.

[0063] After the electric heating rod 132 heats the liquid heat exchange medium in the storage tank 131 to the set temperature, it drives the fan 134 to drive air as a gaseous heat exchange medium into the heat exchange tube 133. The heat exchange tube 133 is immersed in the liquid heat exchange medium in the storage tank 131 so that the gaseous heat exchange medium in the heat exchange tube 133 exchanges heat with the liquid heat exchange medium. The heated gaseous heat exchange medium enters the temperature regulating nozzle 121 through the parallel conduit 135. The gaseous heat exchange medium in the temperature regulating nozzle 121 is sprayed onto the mating conductor 210, which is in a paused or moving state, so as to adjust the temperature of the mating conductor 210 to the set range.

[0064] To meet the testing requirements of different types of contact fingers:

[0065] like Figure 3 As shown, the temperature control bracket 111 is configured to adjust its vertical mounting position to adjust the distance of the contact finger relative to the mating conductor 210 in the vertical direction.

[0066] In order to adjust the vertical installation position of the temperature control bracket 111:

[0067] like Figure 3 As shown, the surface of the support bracket 230 is provided with a vertically extending vertical strip hole 231; the touch-sensitive temperature control structure 110 also includes a limiting bolt and a limiting nut; the temperature control bracket 111 is installed on the support bracket 230 through the limiting bolt and the limiting nut; the limiting bolt is inserted into the vertical strip hole 231 and can move along the length direction of the vertical strip hole 231.

[0068] In this embodiment, the detection position is selected according to the model of the touch finger, which is the distance between the touch finger and the mating conductor 210 installed on the temperature regulating bracket 111. Then, the temperature regulating bracket 111 drives the limiting bolt to move along the vertical strip hole 231. After the temperature regulating bracket 111 moves to the detection position, it is fixed to the bearing bracket 230 by the limiting bolt and the limiting nut.

[0069] To accommodate the different heating temperatures required for the conductor 210:

[0070] like Figure 3 As shown, the temperature-adjusting nozzle 121 is configured to adjust its installation position in the horizontal direction to adjust the distance of the temperature-adjusting nozzle 121 relative to the touch finger in the horizontal direction, thereby adjusting the heating position of the mating conductor 210.

[0071] In order to adjust the horizontal installation position of the temperature-adjusting nozzle 121:

[0072] like Figure 3As shown, the surface of the support bracket 230 is provided with a transversely extending transverse strip hole 232; the conductor temperature regulating structure 120 also includes a locking nut 122; the temperature regulating nozzle 121 is inserted into the transverse strip hole 232 and can move along the length direction of the transverse strip hole 232; the locking nut 122 is screwed onto the temperature regulating nozzle 121 and abuts against the support bracket 230.

[0073] In this embodiment, the temperature adjustment position is selected according to the temperature adjustment requirements of the mating conductor 210, which is the distance between the mating conductor 210 and the contact finger after heating. Then, the temperature adjustment nozzle 121 is moved along the transverse strip hole 232. After the temperature adjustment nozzle 121 moves to the temperature adjustment position, the locking nut 122 is rotated. The locking nut 122 moves toward the support bracket 230 and abuts against it, thereby fixing the temperature adjustment nozzle 121 to the support bracket 230.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A finger abrasion resistance testing fixture, characterized in that: It includes a temperature control mechanism (100) and a drive mechanism (200); The temperature control mechanism (100) includes a temperature control bracket (111); The temperature-adjustable bracket (111) is used to support the finger to be tested and is configured to adjust the temperature of the finger. The drive mechanism (200) includes a mating conductor (210); The mating conductor (210) is configured to slide along the surface of the finger to form a sliding contact with the finger after it has been conditioned by the temperature-regulating bracket (111).

2. The finger abrasion resistance testing fixture according to claim 1, characterized in that: The temperature control mechanism (100) also includes a conductor temperature control structure (120); The conductor temperature regulating structure (120) is disposed on the insertion path of the mating conductor (210) and is used to regulate the temperature of the mating conductor (210) before it comes into contact with the finger.

3. The finger abrasion resistance testing fixture according to claim 2, characterized in that: The drive mechanism (200) has a reciprocating mode and a unidirectional cycle mode; When the drive mechanism (200) is in reciprocating mode, the mating conductor (210) reciprocates and slides in contact with the finger to simulate the frictional behavior during the insertion and removal of the finger; When the drive mechanism (200) is in a unidirectional cycle mode, the mating conductor (210) makes cyclic sliding contact with the finger along the insertion or withdrawal direction to amplify the wear during the insertion or withdrawal process of the finger.

4. The finger abrasion resistance testing fixture according to claim 3, characterized in that: The drive mechanism (200) also includes a conveyor belt (220); The conveyor belt (220) is connected to the mating conductor (210) and is used to drive the mating conductor (210) to move; When the drive mechanism (200) is in reciprocating mode, the conveyor belt (220) moves back and forth to drive the mating conductor (210) to reciprocate and slide in contact with the finger; When the drive mechanism (200) is in a unidirectional cycle mode, the conveyor belt (220) moves cyclically to drive the mating conductor (210) to make cyclic sliding contact with the finger.

5. The finger abrasion resistance testing fixture according to claim 4, characterized in that: The temperature control mechanism (100) also includes a touch-sensitive temperature control structure (110); The touch-sensitive temperature control structure (110) includes the temperature control bracket (111), the heat exchange tube (112), and the circulation pump (113). The heat exchange tube (112) is connected to the side of the temperature control bracket (111) away from the side carrying the finger to be tested; The circulating pump (113) is connected to the heat exchange tube (112) and is used to drive the liquid heat exchange medium to flow through the heat exchange tube (112) to exchange heat with the temperature control bracket (111).

6. The finger abrasion resistance testing fixture according to claim 5, characterized in that: The conductor temperature control structure (120) includes a temperature control nozzle (121); The outlet of the temperature-regulating nozzle (121) is directed toward the insertion path of the mating conductor (210) and is configured to output a gaseous heat exchange medium to regulate the temperature of the mating conductor (210) through heat exchange.

7. The finger abrasion resistance testing fixture according to claim 6, characterized in that: The temperature control mechanism (100) also includes a medium supply structure (130); The medium supply structure (130) includes a liquid storage tank (131) and an electric heating rod (132). The liquid outlet of the storage tank (131) is connected to the inlet of the circulation pump (113), and the liquid inlet is connected to the outlet of the heat exchange tube (112). The electric heating rod (132) is installed inside the liquid storage tank (131) and is used to heat the liquid heat exchange medium inside the liquid storage tank (131).

8. The finger abrasion resistance testing fixture according to claim 7, characterized in that: The medium supply structure (130) also includes multiple heat exchange tubes (133) and a drive fan (134). The outlet of the heat exchange tube (133) is connected to the inlet of the temperature-regulating nozzle (121), and its inlet is connected to the outlet of the drive fan (134). The heat exchange tube (133) is inserted into the liquid storage tank (131) and immersed in the liquid heat exchange medium to transfer the heat of the liquid heat exchange medium to the gaseous heat exchange medium.

9. The finger abrasion resistance testing fixture according to claim 8, characterized in that: The temperature control bracket (111) is configured to adjust its vertical mounting position to adjust the distance of the touch finger relative to the mating conductor (210) in the vertical direction.

10. The finger abrasion resistance testing fixture according to claim 9, characterized in that: The temperature-adjusting nozzle (121) is configured to adjust its installation position in the horizontal direction to adjust the distance of the temperature-adjusting nozzle (121) relative to the touch finger in the horizontal direction, thereby adjusting the heating position of the mating conductor (210).

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