Four-wire method contact resistance test box

Abstract

The utility model discloses a four-wire method contact resistance test box, and relates to the technical field of resistance test boxes. The test box comprises a test box body, the outer side of the test box body is fixedly connected with a clamping head, the top of the test box body is symmetrically and fixedly connected with two groups of protection frames, the top of the test box body is fixedly connected with banana sockets at the inner sides of the protection frames, and the inner sides of the protection frames are symmetrically provided with limiting mechanisms. And the banana plug is automatically pressed against and clamped through the counter-acting force of the stretching of the spring, so that the banana plug is clamped, the banana plug is not easy to loosen or fall off under the action of external force, and the connection reliability in the measurement process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to resistance test box technical field especially is related to a 4 line method contact resistance test box. BACKGROUND

[0002] Resistance test box is a kind of professional equipment for accurately testing resistance, can accurately measure various different types of resistance, user only needs to connect the resistance to be measured correctly to the specific interface of test box, through simple operation steps, can start measurement program.

[0003] The existing Chinese public patent (authorization announcement number: CN218956681U) mentions a kind of for electric power operation safety detection equipment, can be connected to line box by being set, line terminal block can be in line box, when in the use joint connection hole, pull line terminal A will drive the line terminal block inside line terminal block, like this is favorable to connection, when not connecting, only need to hand loose line terminal A due to the action of spring recovery piece line terminal block will be automatically recovered to line box, do like this, both solve the problem of traditional connection line trouble, also avoid the problem that line terminal block is too long to lead to overline and overline too troublesome.

[0004] The existing resistance test box is mostly inserted into socket for detection, to complete resistance test, although simple and easy to operate, but line and socket are easy to loosen, but in the use process, slightly receive external force pull or vibration, line is easy to loosen, possibly lead to measurement result error, the instability of contact resistance can make the resistance value measured inaccurate, inconvenient for providing reliable data support for subsequent analysis and judgment. UTILITY MODEL CONTENTS

[0005] The utility model aims at: for solving the problem that line is easy to loosen, possibly lead to measurement result error, the utility model provides a 4 line method contact resistance test box.

[0006] The utility model discloses a kind of 4 line method contact resistance test boxes to achieve the above-mentioned purposes specifically using the following technical solutions:

[0007] A kind of 4 line method contact resistance test box, including test box body, the test box body outside is fixedly connected with clamping head, the top of the test box body is fixedly connected with two groups of protective frames symmetrically, the top of the test box body is fixedly connected with banana socket in protective frame inner side, the inner side of the protective frame is symmetrically provided with limiting mechanism.

[0008] By adopting the above technical scheme, the to-be-tested object is connected stably with the clamping head outside the test box body, ensuring good contact, then a suitable banana plug is selected according to the test requirement and is inserted into the banana socket at the corresponding position at the top of the test box body, thereby completing the resistance detection of the object, and the risk of loosening and falling of the banana plug is reduced through the limiting mechanism.

[0009] Further, the limiting mechanism comprises sliding rods fixedly connected in symmetry inside the protective frame, fixed seats fixedly connected to the outer side of the sliding rods, clamping seats slidingly connected to one side of the fixed seats on the outer side of the sliding rods, inclined surfaces provided at the top of the fixed seats and the clamping seats, moving rods fixedly connected in symmetry to the side of the clamping seats away from the fixed seats, the moving rods penetrating through the protective frame and fixedly connected with limiting blocks, and the moving rods slidingly connected with the protective frame.

[0010] By adopting the above technical scheme, the banana plug is inserted into the banana socket by the staff, then the clamping seat is driven to approach the fixed seat, thereby clamping the banana plug, so that the banana plug is not easy to loosen or fall off when subjected to external force.

[0011] Further, the side of the fixed seat and the clamping seat approaching each other is provided as a circular arc surface, and a metal plate is fixedly connected to the outer side of the circular arc surface.

[0012] By adopting the above technical scheme, the contact between the clamping seat and the fixed seat and the banana plug is increased, so that the clamping is more stable.

[0013] Further, a spring is sleeved outside the moving rod outside the protective frame, and the side of the spring away from the protective frame is fixedly connected with the limiting block.

[0014] By adopting the above technical scheme, the banana plug is clamped by the counterforce of the spring stretching.

[0015] Further, the outer side of the protective frame is fixedly connected in symmetry with rotating plates, a rotating shaft is rotatably connected between the two rotating plates, a cover plate is fixedly connected to the outer side of the rotating shaft, a rotating rod is fixedly connected to one end of the rotating shaft, a fixed block is fixedly connected to one end of the rotating rod penetrating through the rotating plate, and a torsional spring is sleeved outside the rotating rod.

[0016] By adopting the above technical scheme, the opening of the banana socket is blocked by the cover plate, which can effectively reduce the impurities such as sundries, dust or insects from entering the inside of the banana socket.

[0017] Further, a buffer pad is fixedly connected to the bottom of the cover plate, and the buffer pad is adapted to the opening at the top of the protective frame.

[0018] By adopting the technical scheme, the impact force of the cover plate on the protection frame can be reduced, and the noise of the impact can be effectively reduced.

[0019] To sum up, the utility model discloses the following at least one beneficial effect.

[0020] 1、The utility model discloses, when connecting banana socket, through the counterforce of spring tension, automatic banana plug is resisted and clamped, thereby clamping banana plug, make banana plug not easy to loosen or fall off when being subjected to external force, ensure the reliability of connection in the measuring process, improve the safety and efficiency of testing.

[0021] 2、The utility model discloses, when protecting banana socket, through torsional spring drive cover plate and seal the opening of banana socket, can effectively reduce sundries, dust or insect impurities such as entering banana socket inside, thereby keeping the environment clean and hygienic in banana socket, ensure the good contact between banana plug and banana socket, thereby guaranteeing the accuracy of resistance measurement. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the first three-dimensional structure schematic diagram of test box in the utility model;

[0023] Figure 2 It is the second three-dimensional structure schematic diagram of test box in the utility model;

[0024] Figure 3 It is the first three-dimensional structure schematic diagram of protection frame in the utility model;

[0025] Figure 4 It is the second three-dimensional structure schematic diagram of protection frame in the utility model.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, test box body;2, clamping head;3, protection frame;4, banana socket;5, fixed base;6, clamping seat;7, metal plate;8, moving rod;9, limit block;10, spring;11, rotating plate;12, cover plate;13, rotating rod;14, buffer pad;15, fixed block;16, sliding rod. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings Figures 1-4 The utility model will be further explained in detail.

[0029] The utility model discloses an example of a kind of 4-line method contact resistance test box.

[0030] Refer to Figure 1 And Figure 2The utility model provides a kind of 4-line method contact resistance test box, including test box body 1, clamping head 2 is fixedly connected outside test box body 1, the top of test box body 1 is symmetrically fixedly connected with two groups of protective frame 3, banana socket 4 is fixedly connected in the inside of protective frame 3 of test box body 1 top, the inside of protective frame 3 is symmetrically provided with limiting mechanism.

[0031] When resistance test is carried out, first, the object to be measured is connected with the clamping head 2 outside the test box body 1 stably, ensure good contact, then, select appropriate banana plug according to test requirement, and insert it into the banana socket 4 in the corresponding position of the top of the test box body 1, thereby completing the resistance detection of the article, the banana socket 4 can be limited and fixed by the limiting mechanism, reducing the risk of banana plug loosening and falling off.

[0032] Referring to Figures 1 to 3 The limiting mechanism includes sliding rods 16 fixedly connected symmetrically inside the protective frame 3, fixed seats 5 are fixedly connected to the outside of the sliding rods 16, clamping seats 6 are slidingly connected to one side of the fixed seats 5 outside the sliding rods 16, the top of the fixed seats 5 and the clamping seats 6 are provided as inclined surfaces, moving rods 8 are fixedly connected symmetrically to one side of the clamping seats 6 away from the fixed seats 5, the moving rods 8 penetrate the protective frame 3 and are fixedly connected with limiting blocks 9, and the moving rods 8 are slidingly connected with the protective frame 3.

[0033] The side of the fixed seats 5 and the clamping seats 6 close to each other is provided as a circular arc surface, and a metal plate 7 is fixedly connected to the outside of the circular arc surface of the side of the fixed seats 5 and the clamping seats 6 close to each other.

[0034] In addition, a spring 10 is sleeved outside the moving rod 8 outside the protective frame 3, and the side of the spring 10 away from the protective frame 3 is fixedly connected with the limiting block 9.

[0035] When connecting the banana socket 4, the staff places the banana plug above the protective frame 3, at this time, the banana plug will touch the fixed seats 5 and the clamping seats 6, and the top of the fixed seats 5 and the clamping seats 6 is provided as an inclined surface, so that the clamping seat 6 is away from the fixed seat 5 under the action of the inclined surface, at this time, the staff inserts the banana plug into the banana socket 4, and then drives the clamping seat 6 to be close to the fixed seat 5, so as to clamp the banana plug, so that the banana plug is not easy to loosen or fall off when subjected to external force, ensuring the reliability of connection in the measurement process and improving the safety and efficiency of the test.

[0036] When the clamping block clamps the banana plug, the side of the fixed seats 5 and the clamping seats 6 close to each other is a circular arc surface, so that the contact between the clamping seat 6 and the fixed seat 5 and the banana plug is increased, and the clamping is more stable.

[0037] When the clamping seat 6 is away from the fixed seat 5, the moving rod 8 is moved, the moving rod 8 is stretched, the spring 10 is stretched, and the spring 10 generates elastic potential energy. After the banana socket 4 is inserted, the banana plug is automatically clamped by the counterforce of the spring 10 stretching, without additional operation process, and the inconvenience of manual fixing is reduced.

[0038] Referring to Figure 1 Figure 2 And Figure 4 The outer side of the protective frame 3 is symmetrically and fixedly connected with rotating plates 11, rotating shafts are rotatably connected between the two rotating plates 11, the outer side of the rotating shafts is fixedly connected with cover plates 12, one end of the rotating shafts is fixedly connected with rotating rods 13, one end of the rotating rods 13 penetrates through the rotating plates 11 and is fixedly connected with fixed blocks 15, and torsional springs are sleeved on the outer side of the rotating rods 13.

[0039] The bottom of the cover plate 12 is fixedly connected with a buffer pad 14, and the buffer pad 14 is matched with the top opening of the protective frame 3.

[0040] When the banana socket 4 is protected, first, the cover plate 12 is flipped up, at this time, the cover plate 12 is flipped to drive the rotating shaft to rotate, the rotating shaft rotates to drive the rotating rod 13 to rotate, the rotating rod 13 rotates to compress the torsional spring to generate elastic potential energy, then the banana plug is inserted into the banana socket 4, and after detection is completed, the banana plug is taken out, at this time, the elastic potential energy of the torsional spring is released to drive the rotating shaft to rotate, and the rotating shaft rotates to make the cover plate 12 block the opening of the banana socket 4, which can effectively reduce impurities such as sundries, dust or insects into the inside of the banana socket 4.

[0041] When the cover plate 12 is reset, the bottom of the cover plate 12 is provided with a buffer pad 14, the buffer pad 14 is made of rubber, the rubber has a certain flexibility, the rubber can absorb and buffer the impact force of the cover plate 12 on the protective frame 3, and can effectively reduce the noise of the impact.

[0042] Working principle: connect the object to be tested with the clamping head 2 outside the test box body 1 stably, ensure good contact, then select the appropriate banana plug according to the test requirement, and insert it into the banana socket 4 at the corresponding position at the top of the test box body 1, thereby completing the resistance detection of the object, and placing the banana plug above the protective frame 3, at this time, the banana plug will abut against the fixed seat 5 and the clamping seat 6, the top of the fixed seat 5 and the clamping seat 6 is provided as an inclined surface, under the action of the inclined surface, the clamping seat 6 is away from the fixed seat 5, at this time, the worker inserts the banana plug into the banana socket 4, then drives the clamping seat 6 to be close to the fixed seat 5, thereby clamping the banana plug, reducing the risk of the banana plug falling off.

Claims

1. A 4-wire method contact resistance test box comprising a test box body (1), characterized in that: The test box body (1) is fixedly connected with a clamping head (2) outside, the top of the test box body (1) is fixedly connected with two groups of protective frames (3) in symmetry, a banana socket (4) is fixedly connected inside the protective frame (3) at the top of the test box body (1), and a limiting mechanism is arranged inside the protective frame (3) in symmetry.

2. The 4-wire method contact resistance test box according to claim 1, characterized in that: The limiting mechanism comprises sliding rods (16) fixedly connected inside the protective frame (3) in symmetry, the outer side of the sliding rod (16) is fixedly connected with a fixed seat (5), the outer side of the sliding rod (16) is slidably connected with a clamping seat (6) on one side of the fixed seat (5), the top of the fixed seat (5) and the clamping seat (6) is provided as an inclined surface, the side of the clamping seat (6) away from the fixed seat (5) is fixedly connected with a moving rod (8) in symmetry, the moving rod (8) penetrates the protective frame (3) and is fixedly connected with a limiting block (9), and the moving rod (8) is slidably connected with the protective frame (3).

3. The 4-wire method contact resistance test box according to claim 2, characterized in that: The side of the fixed seat (5) and the clamping seat (6) close to each other is provided as a circular arc surface, and the outer side of the circular arc surface of the side of the fixed seat (5) and the clamping seat (6) close to each other is fixedly connected with a metal plate (7).

4. The 4-wire method contact resistance test box according to claim 2, characterized in that: A spring (10) is sleeved outside the protective frame (3), and the side of the spring (10) away from the protective frame (3) is fixedly connected with the limiting block (9).

5. The 4-wire method contact resistance test box of claim 2, wherein: The outer side of the protective frame (3) is fixedly connected with rotating plates (11) in symmetry, a rotating shaft is rotatably connected between the two rotating plates (11), the outer side of the rotating shaft is fixedly connected with a cover plate (12), one end of the rotating shaft is fixedly connected with a rotating rod (13), one end of the rotating rod (13) penetrates the rotating plate (11) and is fixedly connected with a fixed block (15), and the outer side of the rotating rod (13) is sleeved with a torsion spring.

6. The 4-wire method contact resistance test box according to claim 5, characterized in that: The bottom of the cover plate (12) is fixedly connected with a buffer pad (14), and the buffer pad (14) is matched with the top opening of the protective frame (3).

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