Flat wire sample tool of softening breakdown tester

Abstract

The utility model relates to the technical field of sample tools of softening breakdown testers, and discloses a flat wire sample tool of a softening breakdown tester, which comprises a tool main body, the tool main body is arranged at a sample insertion notch on a copper block, and the tool main body comprises two mounting seats, the device comprises two mounting seats, the two mounting seats are located on the two sides of a sample insertion notch respectively, supporting plates are fixedly mounted on the front sides of the mounting seats, threaded rods are movably arranged on the supporting plates in a penetrating mode and are in screwed connection with the supporting plates through threads, positioning blocks are arranged at the inner ends of the threaded rods, and the threaded rods are rotationally connected with one sides of the positioning blocks through bearings. By arranging the positioning block with the J-shaped front surface, when in use, the device can be adapted to a flat wire sample, and when the sample is subjected to deviation rectification, the positioning groove can be fully attached to the end part of the sample, so that the situation that the heights of the two ends of the sample are different is avoided, the sample can be effectively placed in the middle, and the test effect is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of sample tooling for a softening breakdown tester, in particular to a flat wire sample tooling for a softening breakdown tester. Background Art

[0002] A softening breakdown tester is used to detect the insulation performance of an enameled wire sample after the enamel film softens under a hot state.

[0003] When the existing softening breakdown tester (see Chinese Patent No.: 2017213930243) detects an enameled wire flat wire, the copper block is first preheated to the temperature specified in the relevant product test standard, and then a straightened flat wire sample is inserted into the copper block. A pressure bar applied with a load is placed on the sample, and then a test voltage is immediately applied to the sample. When the enamel film softens and causes a short-circuit current in the sample, it is regarded as breakdown. Three tests are conducted, and the number of short circuits is recorded.

[0004] To meet the needs of detecting flat wires of different widths, the size of the sample insertion slot is made relatively large. For a relatively narrow sample, it cannot be guaranteed to be centered in the insertion slot, resulting in the pressure bar being unable to press on the sample or partially pressing on the surface of the sample, thereby affecting the accuracy of the detection result.

[0005] The existing patent (publication number: CN 217587308 U) discloses an anti-sample deviation mechanism for an enameled wire softening breakdown tester, which is arranged at the flat wire sample insertion slot opening of the copper block. The upper end of the mechanism is U-shaped; the insertion slot opening is opposite to the groove inside the U-shaped structure, and their center lines are collinear; two limit blocks that can move synchronously towards or away from each other are arranged in the groove of the U-shaped structure, and the limit blocks clamp and limit the flat wire sample on the center line of the insertion slot opening. The utility model has a simple and practical structure and is convenient and fast to operate.

[0006] However, when the existing technology is in use, the flat wire sample is clamped by a clamping member. However, due to the flat shape of the sample, it may cause the test to be inclined after clamping. Summary of the Utility Model

[0007] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a flat wire sample tooling for a softening breakdown tester.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] A flat wire sample tooling for a soft breakdown tester, comprising a tooling main body, the tooling main body is arranged at the sample insertion notch of the copper block, the tooling main body includes two mounting seats, the two mounting seats are respectively located on both sides of the sample insertion notch, a support plate is fixedly installed on the front side of the mounting seat, a threaded rod is movably penetrated through the support plate, and the threaded rod is screwed with the support plate, a positioning block is arranged at the inner end of the threaded rod, the threaded rod is rotationally connected to one side of the positioning block through a bearing, a guide rod is installed on the side of the positioning block close to the support plate, and the guide rod movably passes through the support plate, a positioning groove is formed on the other side of the positioning block, and the front surface of the positioning block is J-shaped.

[0010] Preferably, the two sides of the positioning block close to the positioning groove at both ends are designed to be arc-shaped.

[0011] Preferably, a plurality of slots are formed at the bottom of one of the positioning blocks, and a plurality of insertion blocks are arranged at the bottom of the other positioning block, and the insertion blocks are adapted to the slots.

[0012] Preferably, a push-pull rod is movably penetrated through the positioning block, a deviation correction wheel is rotationally installed at the rear end of the push-pull rod through a rotating shaft, the bottom position of the deviation correction wheel corresponds to the bottom position of the sample insertion notch, and the front cross-section of the outer wall shape of the deviation correction wheel is: extending vertically upward from the bottom end to the middle position, and then extending in an arc shape upward to the outside.

[0013] Preferably, both of the mounting seats are detachably installed on the surface of the copper block by bolts.

[0014] Preferably, the length of the pull rod corresponds to the depth of the sample insertion notch on the copper block, and a connecting rod is installed at the front end of the pull rod.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] In the present utility model, by providing a positioning block with a J-shaped front surface, during use, it can be adapted to the flat wire sample. During the process of correcting the deviation of the sample, the positioning groove can fully fit the end of the sample, and the situation where the heights of the two ends of the sample are different will not occur, which can effectively ensure centering placement and does not affect the test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic diagram of the use state of a flat wire sample tooling for a soft breakdown tester proposed by the present utility model;

[0018] Figure 2 FIG. is a flat wire sample tooling for a soft breakdown tester proposed by the present utility model Figure 1 FIG. enlarged view of part A;

[0019] Figure 3Front schematic view of the flat wire sample tooling for a softening breakdown tester proposed by the present utility model;

[0020] Figure 4 Bottom schematic view of two positioning blocks of the flat wire sample tooling for a softening breakdown tester proposed by the present utility model;

[0021] Figure 5 Front view of the deviation correction wheel of the flat wire sample tooling for a softening breakdown tester proposed by the present utility model.

[0022] In the figure: 1, tooling main body; 2, copper block; 3, notch; 4, mounting seat; 5, support plate; 6, threaded rod; 7, positioning block; 8, positioning groove; 9, slot; 10, plug; 11, push-pull rod; 12, deviation correction wheel; 13, connecting rod; 14, guide rod; 15, flat wire sample. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0024] Refer to Figures 1-5 , a flat wire sample tooling for a softening breakdown tester, including a tooling main body 1, the tooling main body 1 is arranged at the sample insertion notch 3 of the copper block 2, the tooling main body 1 includes two mounting seats 4, the two mounting seats 4 are respectively located on both sides of the sample insertion notch 3, a support plate 5 is fixedly installed on the front side of the mounting seat 4, a threaded rod 6 is movably penetrated through the support plate 5, the outer end of the threaded rod 6 is in a T shape, and the threaded rod 6 is threadedly connected with the support plate 5, the inner end of the threaded rod 6 is provided with a positioning block 7, the threaded rod 6 is rotationally connected to one side of the positioning block 7 through a bearing, a guide rod 14 is installed on one side of the positioning block 7 close to the support plate 5, and the guide rod 14 movably passes through the support plate 5, a positioning groove 8 is opened on the other side of the positioning block 7, and the front surface of the positioning block 7 is in a J shape.

[0025] When this tooling is in use, it can adapt to the shape of the flat wire sample. During the process of correcting the deviation of the sample, the positioning groove 8 can fully fit the end of the sample. The specific process is as follows: Insert the flat wire sample into the sample insertion notch 3 on the copper block 2 (since the positioning block 7 is in a J shape, the bottom length is longer than the upper length, and the flat wire sample can be placed on it without manual support), and then rotate the outer end of the threaded rod 6, so that the positioning block 7 moves toward the flat wire sample side under the restriction of the guide rod 14, so that the positioning block 7 is sleeved outside the end of the flat wire sample through the positioning groove 8 until the flat wire sample is positioned and restricted, ensuring that the sample is centered. This process will not cause the situation that the heights of the two ends of the sample are different, and can effectively ensure centering placement without affecting the test effect

[0026] In this embodiment, both sides of the two ends of the positioning block 7 close to the positioning groove 8 are designed to be arc-shaped. The arc-shaped design is beneficial for the flat wire specimen to enter the positioning groove 8 more smoothly.

[0027] In this embodiment, a plurality of slots 9 are opened at the bottom of one of the positioning blocks 7, and a plurality of insertion blocks 10 are arranged at the bottom of the other positioning block 7. The insertion blocks 10 are adapted to the slots 9. The design of the insertion blocks 10 and the slots 9 facilitates the staggered overlap of the positions of the two positioning blocks 7. In this way, when the two positioning blocks 7 are separated, the parts of the insertion blocks 10 and the slots 9 can also effectively support the flat wire specimen, facilitating the subsequent positioning process of the flat wire specimen (this design can ensure the support of the bottom of the flat wire specimen while reducing the length design of the positioning block 7).

[0028] In this embodiment, a push-pull rod 11 is movably penetrated through the positioning block 7. A deviation-correcting wheel 12 is rotatably installed at the rear end of the push-pull rod 11 through a rotating shaft. The bottom position of the deviation-correcting wheel 12 corresponds to the bottom position of the specimen insertion slot 3. The front cross-section of the outer wall shape of the deviation-correcting wheel 12 is: vertically extending upward from the bottom end to the middle position (this position corresponds to the inner end position of the positioning groove 8), and then extending in an arc shape upward toward the outside. When the positioning block 7 moves, it can drive the push-pull rod 11 to move, so that the deviation-correcting wheel 12 abuts against the outside of the flat wire test. Then, after the positioning block 7 moves to the proper position, the push-pull rod 11 can be pushed, so that the deviation-correcting wheel 12 rolls on the side of the flat wire specimen to correct the position of the part of the flat wire specimen inserted into the slot 3, further ensuring the test effect. The shape design of the deviation-correcting wheel 12 can ensure that the middle part of it can abut against the end of the flat wire specimen, and the arc-shaped design can abut against the upper part of the outer end of the flat wire specimen.

[0029] In this embodiment, both of the mounting seats 4 are detachably mounted on the surface of the copper block 2 by bolts, which is convenient for the disassembly and assembly of the device.

[0030] In this embodiment, the length of the pull rod corresponds to the depth of the specimen insertion slot 3 on the copper block 2. A connecting rod 13 is installed at the front end of the pull rod, which is convenient for inserting the deviation-correcting wheel 12 into the end of the flat wire specimen. After the flat wire specimen is connected, the deviation-correcting wheel 12 is pulled out. The connecting rod 13 is for pulling the two deviation-correcting wheels 12 simultaneously.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A flat wire specimen fixture for a softening breakdown tester, comprising a fixture body, the fixture body being arranged at a specimen slot opening on a copper block, the fixture body comprising two mounting seats, the two mounting seats being respectively located at two sides of the specimen slot opening, a support plate being fixedly mounted on the front side of the mounting seat, a threaded rod being movably penetrated on the support plate, and the threaded rod being screwed to the support plate by threads, a positioning block being arranged at the inner end of the threaded rod, and characterized in that: The threaded rod is rotatably connected to one side of the positioning block through a bearing, a guide rod is installed on one side of the positioning block close to the support plate, and the guide rod movably passes through the support plate, a positioning groove is opened on the other side of the positioning block, and the front side of the positioning block is J-shaped.

2. The flat wire specimen fixture of the softening breakdown tester according to claim 1, characterized in that: One side of both ends of the positioning block close to the positioning groove is designed in an arc shape.

3. The flat wire specimen fixture of the softening breakdown tester according to claim 2, characterized in that: A plurality of slots are provided at the bottom of one of the positioning blocks, and a plurality of inserting blocks are provided at the bottom of the other positioning block, and the inserting blocks are adapted to the slots.

4. The flat wire specimen fixture of the softening breakdown tester according to claim 2, characterized in that: A push-pull rod is movably provided on the positioning block, and a correction wheel is rotatably installed on the rear end of the push-pull rod through a rotating shaft. The bottom position of the correction wheel corresponds to the bottom position of the sample insertion slot. The front section of the outer wall of the correction wheel is: extending vertically upward from the bottom end to the middle position, and then extending in an arc shape toward the upper outside.

5. The flat wire specimen fixture of the softening breakdown tester according to claim 1, characterized in that: The two mounting seats are both detachably mounted on the surface of the copper block by bolts.

6. The flat wire specimen fixture of the softening breakdown tester according to claim 1, characterized in that: The length of the pull rod corresponds to the depth of the slot through which the specimen is inserted on the copper block, and a connecting rod is installed at the front end of the pull rod.

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