Insulation resistance tester

Abstract

The utility model relates to an insulation resistance tester, which comprises a tester main body, the telescopic mechanism comprises a fixed guide rail and a sliding frame, the fixed guide rail is arranged on the bottom surface of the tester main body, and the sliding frame is arranged in the fixed guide rail; the stabilizing frame comprises a positioning plate, a mounting frame, a pressure spring, a connecting shaft, a torsion spring and a wire pressing block, and the mounting frame is arranged on the upper surface of the sliding frame; the wire pressing block is hinged with the mounting frame through a connecting shaft and a torsional spring; and the positioning plate is arranged in the mounting frame. According to the utility model, components such as the cable pressing block, the connecting shaft and the torsion spring are arranged, and the cable pressing block and the connecting shaft are matched, so that the cable pressing block is pushed when a cable passes through, the pressing plate extrudes the outer surface of the cable under the action of the elastic force of the torsion spring, and the position of the cable is fixed; therefore, the connection stability of the metal clamp and the to-be-tested equipment is prevented from being influenced by cable bending.

Description

Technical Field

[0001] The utility model relates to the technical field of insulation resistance testers, in particular to an insulation resistance tester. Background Art

[0002] Insulation resistance meter is a device suitable for measuring the resistance value of various insulating materials and the insulation resistance of transformers, motors, cables and electrical equipment.

[0003] Insulation resistance meters are mostly used to test larger equipment such as transformers and motors. During the test, they are connected to the device under test through cables and metal clamps. In this process, since the cables are composed of metal conductors and insulating rubber shells, in order to avoid the problem of insufficient cable length, longer cables are usually used, so that there is a surplus in the cables after use, which will cause part of the cables to hang on the ground. This part of the hanging cable will experience elastic deformation (i.e., the cable bends or twists). At this time, the cable pulls the metal clamp under the action of the reverse elastic force generated by the elastic deformation and the gravity of the cable itself, which will cause the connection between the metal clamp and the device under test to be unstable or even detached. Therefore, an insulation resistance tester is proposed to solve the above-mentioned problems. Utility Model Content

[0004] Based on the above description, the present invention provides an insulation resistance tester to solve the problem that the existing insulation resistance tester has an unstable connection with the device to be tested due to elastic deformation of the cable.

[0005] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: An insulation resistance tester, characterized in that it includes: a tester body and a telescopic mechanism, the telescopic mechanism includes a fixed guide rail and a sliding frame, the fixed guide rail is arranged on the bottom surface of the tester body, the sliding frame is arranged inside the fixed guide rail, the stabilizing frame includes a positioning plate, a mounting frame, a pressure spring, a connecting shaft, a torsion spring and a wire pressing block, the mounting frame is arranged on the upper surface of the sliding frame, the wire pressing block is hinged to the mounting frame through a connecting shaft and a torsion spring, the positioning plate is arranged inside the mounting frame and extends to the bottom of the sliding frame, and the pressure spring is arranged between the positioning plate and the mounting frame.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the fixed guide rail includes a U-shaped guide rail, guide grooves are provided on both side walls inside the U-shaped guide rail, and an inclined surface is provided on the surface of the U-shaped guide rail close to one end of the stabilizing frame.

[0008] Furthermore, the sliding frame includes a sliding plate, rollers are provided on both sides of the sliding plate, the rollers extend into the interior of the guide groove, and a mounting groove is provided on the upper surface of the sliding plate.

[0009] Furthermore, the positioning plate includes a friction plate, and the friction plate is arranged inside the installation slot and passes through the installation slot.

[0010] Furthermore, a vertical rod is provided at the bottom end of the friction plate, and the vertical rod is in contact with the bottom surface inside the U-shaped guide rail.

[0011] Furthermore, the mounting frame includes a hollow frame, a fixing sleeve is provided at the top end of the hollow frame, an outer surface of the fixing sleeve is provided with hinged ears and an opening, and the opening is provided between the hinged ears.

[0012] Furthermore, a connecting shaft is provided between the hinged ears, a torsion spring and a wire pressing block are provided outside the connecting shaft, and two ends of the torsion spring extend to the inside of the hinged ears and the wire pressing block respectively.

[0013] Furthermore, the wire pressing block includes a cross bar, and a pressing plate is provided on each opposite side of the cross bar, and the side of the pressing plate close to the tester body is an inclined surface.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0015] 1. The utility model is provided with components such as a wire pressing block, a connecting shaft, and a torsion spring. Through the cooperation between the wire pressing block and the connecting shaft, when the cable passes through, the wire pressing block is pushed, so that the wire pressing block rotates with the connecting shaft as the center. At this time, the pressure plate moves with the connecting shaft as the center in the direction away from the tester body. When the movement stops, the pressure plate is squeezed with the outer surface of the cable under the action of the torsion spring elastic force, thereby fixing the cable position, thereby preventing the cable from bending and affecting the stability of the connection between the metal clamp and the device under test;

[0016] 2. By setting up the fixed guide rail and the sliding frame, the effect of lengthening the mounting frame is achieved, so that the mounting frame can be as close to the device under test as possible, thereby reducing the length of the cable required between the mounting frame and the device under test, and the positioning plate is tightly fitted to the ground through the pressure spring, and the sliding frame and the fixed guide rail are tightly fitted under the action of the elastic force of the pressure spring, thereby achieving the effect of fixing the position of the mounting frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of an insulation resistance tester provided in an embodiment of the present utility model;

[0018] Figure 2 This is a structural cross-sectional view of the stabilizing frame and the telescopic mechanism in an embodiment of the present utility model;

[0019] Figure 3 for Figure 2 A structural diagram from another perspective;

[0020] Figure 4 This is a schematic diagram of the exploded structure of the stabilizing frame and the telescopic structure in the embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the explosion structure of the stabilizing frame in the embodiment of the utility model;

[0022] Figure 6 This is a structural diagram of a positioning plate in an embodiment of the present utility model;

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Tester body; 2. Fixed guide rail; 21. U-shaped guide rail; 22. Guide groove; 23. Inclined surface; 3. Sliding frame; 31. Sliding plate; 32. Roller; 33. Mounting groove; 4. Positioning plate; 41. Friction plate; 42. Vertical rod; 5. Mounting frame; 51. Hollow frame; 52. Fixed sleeve; 53. Articulated ear; 54. Opening; 6. Pressure spring; 7. Connecting shaft; 8. Torsion spring; 9. Pressing block; 91. Crossbar; 92. Pressing plate. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0027] When used herein, the singular forms "a", "an", and "the" may also include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0028] See also Figures 1-4 , an insulation resistance tester, comprising:

[0029] Tester main body 1; and

[0030] The telescopic mechanism includes a fixed guide rail 2 and a sliding frame 3. The fixed guide rail 2 is arranged on the bottom surface of the tester body 1, wherein:

[0031] The fixed guide rail 2 includes a U-shaped guide rail 21, and guide grooves 22 are provided on both side walls of the interior of the U-shaped guide rail 21. The surface of the U-shaped guide rail 21 close to one end of the stabilizing frame is provided with an inclined surface 23;

[0032] A sliding frame 3 is provided inside the fixed guide rail 2. The sliding frame 3 includes a sliding plate 31. Rollers 32 are provided on both sides of the sliding plate 31. The rollers 32 extend into the interior of the guide groove 22. A mounting groove 33 is provided on the upper surface of the sliding plate 31.

[0033] Based on the above, the fixed guide rail 2 and the sliding frame 3 cooperate with each other, so that the sliding frame 3 can be extended along the direction of the fixed guide rail 2. After extension, the sliding frame 3 is still restricted by the fixed guide rail 2 and can only move along the direction of the fixed guide rail 2.

[0034] like Figure 1 and Figure 5 As shown, the mounting frame 5 is arranged on the upper surface of the sliding frame 3, and the mounting frame 5 includes a hollow frame 51. The top of the hollow frame 51 is provided with a fixing sleeve 52. The outer surface of the fixing sleeve 52 is provided with a hinged ear 53 and an opening 54. The opening 54 is provided between the hinged ears 53. A connecting shaft 7 is provided between the hinged ears 53. A torsion spring 8 and a wire pressing block 9 are provided on the outside of the connecting shaft 7. The two ends of the torsion spring 8 extend to the inside of the hinged ear 53 and the wire pressing block 9 respectively.

[0035] A wire pressing block 9 is hingedly connected to the mounting frame 5 via a connecting shaft 7 and a torsion spring 8. The wire pressing block 9 includes a crossbar 91. A pressure plate 92 is provided on each side opposite to the crossbar 91. The side of the pressure plate 92 close to the tester body 1 is an inclined surface.

[0036] The cable is fixed in this way, and the excess part of the cable can be left in the space between the mounting bracket 5 and the tester body 1, thereby avoiding the elastic force and gravity generated by the twisting deformation of the cable to affect the metal clamp.

[0037] like Figure 2-Figure 4 as well as Figure 6 As shown, the positioning plate 4 is arranged inside the mounting frame 5 and extends to the bottom of the sliding frame 3. The positioning plate 4 includes a friction plate 41. The friction plate 41 is arranged inside the mounting groove 33 and passes through the mounting groove 33. The bottom end of the friction plate 41 is provided with a vertical rod 42. The vertical rod 42 contacts the bottom surface of the U-shaped guide rail 21.

[0038] A pressure spring 6 is provided between the positioning plate 4 and the mounting bracket 5;

[0039] Based on the above, the positioning plate 4 is tightly fitted with the bottom wall inside the fixed guide rail 2 after being subjected to the downward elastic force of the pressure spring 6. At this time, the sliding frame 3 is fixed in position under the action of friction. When the sliding frame 3 is extended, the positioning plate 4 is tightly fitted with the ground, achieving the effect of fixed position.

[0040] In actual use of this embodiment, the setting of the mounting bracket 5 plays a role in limiting the cable. After the cable passes through the fixing sleeve 52, the cable is clamped between the two pressing blocks 9. During the passing process, the cable pushes the pressing block 9 to rotate with the connecting shaft 7 as the center, so that the pressure plate 92 moves in the direction away from the tester body 1. During this process, the torsion spring 8 is deformed by the force and generates elastic force. At this time, the cable is fixed in position under the action of the pressing block 9 and the torsion spring 8.

[0041] If the cable moves away from the tester body 1, the pressing block 9 rotates around the connecting shaft 7, allowing the cable to continue moving.

[0042] If the cable moves toward the tester body 1 under the action of deformation or external force, the pressing block 9 is driven to move together. At this time, the pressing block 9 has no margin for movement, so it clamps the cable and prevents it from moving, thereby fixing the cable. By fixing the cable in this way, the excess part of the cable can be left in the space between the mounting bracket 5 and the tester body 1, thereby preventing the elastic force generated by the twisting and deformation of the cable and gravity from affecting the metal clamp.

[0043] By setting the fixed guide rail 2 and the sliding frame 3, the stabilizing frame can be extended and as close to the device under test as possible, thereby reducing the length of the cable between the stabilizing frame and the device under test, thereby avoiding the negative impact of the cable between the stabilizing frame and the device under test on the metal clamp, and further improving the clamping stability of the metal clamp;

[0044] The resistance tester is equipped with a telescopic mechanism and a stabilizing frame, so that the device has the effect of clamping and fixing the cable. When the cable is long, it can avoid the negative impact of the elastic force generated by the cable's own weight and deformation, thereby ensuring that the connection between the metal clamp and the device under test is sufficiently stable.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An insulation resistance tester, characterized in that: include: Tester body (1); as well as A telescopic mechanism comprises a fixed guide rail (2) and a sliding frame (3), wherein the fixed guide rail (2) is arranged on the bottom surface of the tester body (1), wherein: A sliding frame (3) is arranged inside the fixed guide rail (2); A stabilizing frame comprises a positioning plate (4), a mounting frame (5), a pressure spring (6), a connecting shaft (7), a torsion spring (8) and a wire pressing block (9), wherein: A mounting frame (5) disposed on the upper surface of the sliding frame (3); A wire pressing block (9) is hingedly connected to the mounting frame (5) via a connecting shaft (7) and a torsion spring (8); a positioning plate (4) disposed inside the mounting frame (5) and extending below the sliding frame (3); A pressure spring (6) is arranged between the positioning plate (4) and the mounting frame (5).

2. The insulation resistance tester according to claim 1, characterized in that: The fixed guide rail (2) comprises a U-shaped guide rail (21), both side walls of the U-shaped guide rail (21) are provided with guide grooves (22), and the surface of the U-shaped guide rail (21) close to one end of the stabilizing frame is provided with an inclined surface (23).

3. The insulation resistance tester according to claim 2, characterized in that: The sliding frame (3) comprises a sliding plate (31), rollers (32) are provided on both sides of the sliding plate (31), the rollers (32) extend into the interior of the guide groove (22), and a mounting groove (33) is provided on the upper surface of the sliding plate (31).

4. The insulation resistance tester according to claim 3, characterized in that: The positioning plate (4) comprises a friction plate (41), and the friction plate (41) is arranged inside the installation groove (33) and passes through the installation groove (33).

5. The insulation resistance tester according to claim 4, characterized in that: A vertical rod (42) is provided at the bottom end of the friction plate (41), and the vertical rod (42) contacts the bottom surface inside the U-shaped guide rail (21).

6. The insulation resistance tester according to claim 1, characterized in that: The mounting frame (5) comprises a hollow frame (51), a fixing sleeve (52) is provided at the top end of the hollow frame (51), an outer surface of the fixing sleeve (52) is provided with hinged ears (53) and an opening (54), and the opening (54) is provided between the hinged ears (53).

7. The insulation resistance tester according to claim 6, characterized in that: A connecting shaft (7) is provided between the hinged ears (53), a torsion spring (8) and a wire pressing block (9) are provided outside the connecting shaft (7), and two ends of the torsion spring (8) extend to the inside of the hinged ears (53) and the wire pressing block (9) respectively.

8. The insulation resistance tester according to claim 1, characterized in that: The wire pressing block (9) comprises a cross bar (91), and a pressing plate (92) is provided on each opposite side of the cross bar (91), and the side of the pressing plate (92) close to the tester body (1) is an inclined surface.

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