A portable testing instrument for power construction machinery and equipment

Abstract

This invention relates to a portable testing instrument for electrical construction machinery and equipment, belonging to the field of machinery and equipment testing technology. It includes a housing, an extension rod placed at the back end of the housing, a mounting frame mounted on the top of the extension rod, two sets of adjustable platforms sliding within the mounting frame, and movable rods mounted on the surfaces of the two sets of adjustable platforms. Rollers are rotatably connected inside the adjustable platforms, and a limiting mechanism is provided inside the mounting frame. This invention, by setting up the mounting frame, adjustable platforms, and clamping mechanism, can stably limit and fix the test pen of the insulation resistance tester on the rollers, eliminating the need for prolonged hand-holding by the operator. This effectively avoids hand muscle fatigue, soreness, and numbness caused by prolonged holding of the test pen, significantly improving the comfort and continuity of long-term testing operations.

Description

Technical Field

[0001] This invention relates to the field of machinery and equipment testing technology, specifically a portable testing instrument for power construction machinery and equipment. Background Technology

[0002] In various work scenarios such as power construction, distribution network erection, line maintenance, and equipment operation and maintenance, power tools are core equipment to ensure efficient and safe operation. These tools encompass various types, including insulated tools, mechanical tools, and electric tools, specifically including insulating rods, insulating gloves, hydraulic pliers, wire cutters, wire tensioners, high-voltage detectors, and electric hydraulic tools. The performance, reliability, and safety status of these power tools directly affect the quality and efficiency of power construction, and more importantly, the personal safety of on-site workers and the stable operation of the power grid, making them a crucial guarantee for safe power production.

[0003] In various power operation scenarios, such as power construction, substation maintenance, line repair, and equipment commissioning, insulation resistance testing is one of the core links in ensuring the safe and stable operation of the power system. Insulation resistance testers, as specialized testing equipment, are mainly used to test the insulation performance of various power tools, electrical equipment, and lines. Especially for insulating power tools such as insulating rods, insulating gloves, insulating boots, and high-voltage detectors, by measuring their insulation resistance values, it can determine whether there are defects such as aging, damage, moisture, or deterioration in the insulation layer, promptly identify potential insulation failures, and prevent safety accidents such as electric shock, equipment short circuits, and line faults caused by substandard insulation performance. It is an indispensable basic testing equipment in power safety production.

[0004] Existing insulation resistance testers use a single straight rod structure for their test pens. This fixed structure lacks angle adjustment, severely limiting the operator's grip angle in confined spaces (such as gaps between equipment in power distribution rooms or inside cable trenches), equipment gaps, and at heights. This makes it difficult to flexibly adjust the probe's orientation according to the location of the part being tested, hindering accurate alignment of the test point with the insulating component. This problem directly leads to test point misalignment, resulting in insufficient contact between the test pen and the component being tested, thus distorting the insulation resistance test data. Furthermore, during testing, operators must hold the test pen in a fixed posture for extended periods. The pen itself has a certain weight, and prolonged holding can easily cause hand muscle fatigue and soreness. This fatigue further exacerbates the problem of unstable grip and positioning deviation, affecting test accuracy and potentially causing the pen to slip unexpectedly, leading to the aforementioned safety hazards.

[0005] To address the aforementioned issues, innovative design based on existing methods is urgently needed. Summary of the Invention

[0006] The purpose of this invention is to provide a portable power construction machinery and equipment testing instrument to solve the problems mentioned in the background. The technical solution of this invention addresses the problem that the existing technical solutions are too simplistic and provides a solution that is significantly different from the existing technology.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a portable power construction machinery and equipment testing instrument, comprising a housing, an extension rod placed at the back end of the housing, a placement frame installed at the top of the extension rod, two sets of adjustment platforms slidingly within the placement frame, movable rods installed on the surfaces of the two sets of adjustment platforms, rollers rotatably connected inside the adjustment platforms, a limiting mechanism provided inside the placement frame, and a clamping mechanism provided inside the rollers; The limiting mechanism includes a sliding plate that limits sliding on the surface of the moving rod, and a pressing rod that limits sliding inside the placement frame. A contact plate is provided inside the placement frame with a notch for limiting sliding. A pressing block is installed at the end of the sliding plate away from the pressing rod. A pull rod is provided inside the adjustment table for limiting sliding. A pressure table is installed at the end of the pull rod away from the adjustment table.

[0008] Preferably, the extension rod has a sliding guide inside for limiting sliding, and the extension rod has a through threaded hole inside, in which a bolt is installed. The bolt is located inside the extension rod at one end and abuts against the sliding guide.

[0009] Preferably, the two sets of adjustment platforms are symmetrically arranged inside the placement frame, and the moving rods located on the surfaces of the two sets of adjustment platforms slide within the sliding grooves inside the placement frame.

[0010] Preferably, the pressing rod is located inside the placement frame and is connected to the abutment plate at one end. A spring is installed on the surface of the abutment plate near the internal notch of the placement frame. The other end of the spring is connected to the inner wall of the notch of the placement frame. The other side of the abutment plate abuts against the sliding plate. A spring is installed between the sliding plate and the moving rod.

[0011] Preferably, a rubber block is installed at one end of the pull rod inside the adjustment platform, and a spring is connected between the rubber block and the inner wall of the adjustment platform. The end of the pressure platform near the pull rod has an arc-shaped semi-circular design, and an inclined surface is opened on the surface of the extrusion block. One end of the arc-shaped semi-circular design of the pressure platform abuts against the inclined surface of the extrusion block.

[0012] Preferably, the clamping mechanism includes a sleeve installed inside the roller, an installation ring installed at the bottom of the sleeve, a limiting ring that slides inside the installation ring, a limiting rod installed at the top inside the installation ring, a clamping plate that slides laterally inside the limiting ring, one end of the clamping plate passing through the limiting ring and having an abutment block installed thereon, a spring installed at the back end of the clamping plate, the other end of the spring being connected to the limiting ring, and an inclined surface being formed on the upper surface of the abutment block.

[0013] Preferably, the limiting ring slides on the surface of the limiting rod, and a spring is sleeved on the surface of the limiting rod. One end of the spring is connected to the protrusion at the bottom of the limiting rod, and the other end is connected to the limiting ring.

[0014] Preferably, the number of clamping plates is six sets, and the six sets of clamping plates are distributed equidistantly in a circular shape inside the limiting ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up a placement frame, adjustment platform, and clamping mechanism, can stably limit and fix the test pen of the insulation resistance tester on the roller, eliminating the need for operators to hold the test pen for extended periods. This effectively avoids hand muscle fatigue, soreness, and numbness caused by prolonged holding of the test pen, significantly improving the comfort and continuity of long-term testing operations. Simultaneously, this structure eliminates unstable grip, wobbling, and deviation of the test pen caused by hand fatigue, ensuring the test pen probe maintains a stable testing posture and precise positioning. This greatly improves the consistency and accuracy of insulation resistance testing data, reducing the risk of distorted, misjudged, or missed detections due to positioning deviations, ensuring a true reflection of the insulation state of the tested components. Furthermore, the stable and fixed detection method reduces the difficulty of operation for operators in complex scenarios such as high places and confined spaces, reducing safety risks such as probe slippage and accidental contact with live parts. This improves both the safety of the testing operation and the overall testing efficiency, achieving labor-saving, stable, and precise insulation resistance testing.

[0016] 2. This invention, through the setting of an adjustment platform, a moving rod, a roller, and a limiting mechanism, allows for flexible adjustment of the measuring distance of the test pen according to the actual position of the detection point. The omnidirectional rotating roller connected inside the adjustment platform allows for manual, flexible, and arbitrary adjustment of the test pen's detection angle, adapting to different working conditions such as confined spaces, equipment gaps, and high-altitude operations. Reliable locking and limiting are achieved simultaneously after adjustment. This structure effectively solves the drawbacks of traditional straight-rod test pens with fixed and difficult-to-adjust detection positions, ensuring precise alignment of the test pen probe with the detection area, improving detection positioning accuracy and the reliability of detection results. The adjustable design and locking mechanism prevent probe position shifting or shaking during detection, ensuring stable and consistent detection posture and reducing data fluctuations and the risk of misjudgment. Simultaneously, it eliminates the need for operators to repeatedly adjust their grip, reducing operational difficulty and workload, improving adaptability and detection efficiency in complex scenarios, and further ensuring safe, stable, and efficient detection operations.

[0017] 3. The extension rod of this invention is located at the back end of the housing and can be flexibly removed from the back end of the housing. It is suitable for the installation and use of the test pen in different states, further expanding the adaptability and ease of operation of the insulation resistance tester's test pen. The flexible design of the extension rod can adapt to the installation and use needs of the test pen in different states. When the testing scenario is a confined space, such as a narrow space or equipment gap, the extension rod makes it easy for the operator to accurately place the test pen into the testing point. At the same time, in conjunction with the angle adjustment function of the adjustment table and roller, it further improves the operational flexibility in confined spaces, solving the drawback of traditional fixed extension rods that cannot adapt to narrow testing scenarios. Furthermore, the detachable design of the extension rod facilitates the storage, transportation and maintenance of the equipment. After the testing operation is completed, the extension rod can be installed at the back end of the housing, making it easy for the operator to carry to different testing sites and reducing the burden of carrying. At the same time, when the extension rod is worn or damaged, it can be disassembled and replaced separately without replacing the entire housing or testing components, reducing equipment maintenance costs and extending the service life of the overall device.

[0018] 4. When the test pen of this invention is installed inside the sleeve, due to the long distance left at the bottom of the test pen, the extension rod will obstruct its rotation angle during the universal rotation of the test pen, limiting the rotation flexibility of the test pen. However, as the adjustment table moves and adjusts, the distance between the test pen and the extension rod increases accordingly. During this process, the universal rotation angle of the test pen can be expanded synchronously, thereby effectively removing the obstruction restriction of the test pen's rotation by the extension rod, significantly improving the universal rotation flexibility and angle adjustment range of the test pen, adapting to the detection needs of different working conditions such as narrow spaces, equipment gaps, and high-altitude operations, ensuring that the test pen can be flexibly adjusted to the optimal detection position and accurately align with the detection point; at the same time, the synchronous expansion of the rotation angle eliminates the need for frequent adjustment of the adjustment table position, further reducing the difficulty of operation, reducing positioning time, and improving detection efficiency. In conjunction with the distance adjustment function of the adjustment table, it achieves synchronous adaptation of the test pen's detection distance and rotation angle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main structure of the present invention from another perspective; Figure 3 This is a schematic diagram of the extension rod and slide rod of the present invention; Figure 4 This is an exploded structural diagram of the extension rod and slide rod of the present invention; Figure 5 This is an exploded structural diagram of the adjusting platform, moving rod, and roller of the present invention; Figure 6 This is an exploded view of the limiting mechanism of the present invention; Figure 7This is a partial structural diagram of the adjusting table and roller of the present invention; Figure 8 This is a cross-sectional structural diagram of the clamping mechanism of the present invention; Figure 9 This is a cross-sectional structural diagram of the adjustment platform of the present invention.

[0020] In the diagram: 1. Housing; 2. Extension rod; 3. Slide rod; 4. Bolt; 5. Placement frame; 6. Adjustment platform; 7. Moving rod; 8. Roller; 901. Slide plate; 902. Pressing rod; 903. Abutment plate; 904. Extrusion block; 905. Pull rod; 906. Pressing platform; 101. Sleeve; 102. Mounting ring; 103. Limiting ring; 104. Limiting rod; 105. Clamping plate; 106. Abutment block. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0022] Please see Figures 1-9 This invention provides a technical solution: a portable power construction machinery and equipment testing instrument, comprising a housing 1, an extension rod 2 placed at the back end of the housing 1, a sliding rod 3 slidably positioned inside the extension rod 2, a through threaded hole inside the extension rod 2, a bolt 4 installed in the threaded hole, one end of the bolt 4 inside the extension rod 2 abutting against the sliding rod 3, a placement frame 5 installed on the top of the extension rod 2, two sets of adjusting platforms 6 slidably positioned inside the placement frame 5, the two sets of adjusting platforms 6 being symmetrically arranged inside the placement frame 5, movable rods 7 located on the surfaces of the two sets of adjusting platforms 6 being limited and slidably positioned within the sliding grooves inside the placement frame 5, movable rods 7 being installed on the surfaces of the two sets of adjusting platforms 6, a roller 8 being rotatably connected inside the adjusting platform 6, a limiting mechanism being provided inside the placement frame 5, and a clamping mechanism being provided inside the roller 8. When the testing distance is far, the bolt 4 can be rotated so that its bottom end leaves the surface of the sliding rod 3, then the sliding rod 3 is slid out inside the extension rod 2, and then the bolt 4 is rotated again so that its bottom end is in contact with the sliding rod 3 again, thus limiting it inside the extension rod 2.

[0023] In one embodiment of the present invention, the limiting mechanism includes a sliding plate 901 that limits sliding on the surface of the moving rod 7, and a pressing rod 902 that limits sliding inside the placement frame 5. One end of the pressing rod 902 inside the placement frame 5 is connected to a contact plate 903. A spring is installed on the surface of the contact plate 903 near the internal notch of the placement frame 5, and the other end of the spring is connected to the inner wall of the notch of the placement frame 5. The other side of the contact plate 903 abuts against the sliding plate 901. A spring is installed between the sliding plate 901 and the moving rod 7, and the internal notch of the placement frame 5 limits the movement. A sliding contact plate 903 is provided. A pressing block 904 is installed at the end of the sliding plate 901 away from the pressing rod 902. A pull rod 905 is provided inside the adjusting platform 6 for limiting sliding. A rubber block is installed at one end of the pull rod 905 inside the adjusting platform 6. A spring connects the rubber block and the inner wall of the adjusting platform 6. The end of the pressing platform 906 near the pull rod 905 has an arc-shaped semi-circular design. An inclined surface is provided on the surface of the pressing block 904. The arc-shaped semi-circular design of the pressing platform 906 abuts against the inclined surface of the pressing block 904. The end of the pull rod 905 away from the adjusting platform 6 is equipped with the pressing platform 906. After the test pen is positioned within the sleeve 101, pressing the pressing rod 902 moves the contact plate 903 inward, pushing the slide plate 901 away from the inner side of the placement frame 5. The spring at the rear end of the slide plate 901 is stretched. The pressing block 904 moves with the slide plate 901, its inclined surface pushes against the pressing table 906 and pulls the pull rod 905, causing the rubber block to separate from the roller 8. The roller 8 can then rotate freely to adjust the angle of the sleeve 101. At the same time, after the slide plate 901 is unlocked, the adjusting table 6 can slide within the placement frame 5 to adjust the distance between the test pens, adapting to different specifications of testing equipment and avoiding problems such as hand fatigue, soreness, unstable grip, and positioning deviation caused by long-term holding of the test pen. After the test pen reaches the appropriate position and angle, the pressing rod 902 is released, the contact plate 903 resets under the action of the spring, and the spring at the rear end of the slide plate 901 rebounds, causing the slide plate 901 to press against the inner side of the placement frame 5 again, locking the position of the adjusting table 6. After the pressing block 904 resets, the rubber block is pressed again under the action of the spring. Tighten roller 8 to lock the angle; through adjustment table 6, sliding mechanism, roller 8 and linkage limit mechanism, the angle and distance of the test pen can be flexibly adjusted and reliably locked, adapting to complex working conditions such as narrow spaces, equipment gaps and high-altitude operations, solving the problems of inconvenient adjustment and low positioning accuracy of traditional test pens; during testing, the probe posture is stable without deviation or shaking, effectively reducing data fluctuation and misjudgment risk, and improving the accuracy of insulation resistance testing; at the same time, it eliminates the need for manual hand-holding and fixing, reducing operational intensity and fatigue risks, and improving testing safety, adaptability and work efficiency.

[0024] In one embodiment of the present invention, the clamping mechanism includes a sleeve 101 installed inside the roller 8, an installation ring 102 installed at the bottom of the sleeve 101, a limiting ring 103 sliding inside the installation ring 102, the limiting ring 103 sliding on the surface of the limiting rod 104, a spring sleeved on the surface of the limiting rod 104, one end of the spring connected to the bottom protrusion of the limiting rod 104, and the other end connected to the limiting ring 103, the limiting rod 104 installed at the top inside the installation ring 102, a clamping plate 105 sliding laterally inside the limiting ring 103, the number of clamping plates 105 is six, the six sets of clamping plates 105 are equidistantly distributed in a circular shape inside the limiting ring 103, one end of the clamping plate 105 passes through the limiting ring 103 and is equipped with an abutment block 106, a spring is installed at the back end of the clamping plate 105, the other end of the spring is connected to the limiting ring 103, and an inclined surface is opened on the upper surface of the abutment block 106; Connect the test pen's connecting wire to the surface of the housing 1, remove the back extension rod 2, pull the limiting ring 103 downward, compress the spring of the limiting rod 104, and drive the clamping plate 105 and the contact block 106 to move downward simultaneously, so that the contact block 106 disengages from the mounting ring 102; at this time, the spring at the back of the clamping plate 105 rebounds, pulling the clamping plate 105 towards the limiting ring 103, and then insert the test pen into the limiting ring 103 and the sleeve 101, release the limiting ring 103, the spring returns and drives it to move upward, the bottom of the mounting ring 102 abuts against the inclined surface of the contact block 106, driving the clamping plate 105 to close towards the center, thus achieving stable clamping of the test pen; through the placement frame 5, the adjustment platform 6 and the clamping mechanism, the test pen is firmly limited and fixed, eliminating the need for manual hand holding, effectively avoiding hand fatigue and soreness caused by long-term holding, and eliminating problems such as unstable holding and probe displacement caused by fatigue. The stable clamping structure ensures that the probe maintains precise positioning and a stable posture at all times, significantly improving the consistency and accuracy of insulation resistance test data, reducing distortion, misjudgment, and missed detections, and truly reflecting the insulation condition. At the same time, this design reduces the difficulty of working at heights and in confined spaces, effectively avoiding safety risks such as probe slippage and accidental contact with high voltage, significantly improving the safety, comfort, and efficiency of the testing operation, and achieving labor-saving, stable, and accurate insulation resistance testing.

[0025] Working principle: In use, first connect the test pen's connecting wire to the surface of housing 1. Then remove the extension rod 2 from the back end of housing 1 and pull the limiting ring 103 to move it downwards on the mounting ring 102. As the mounting ring 102 moves downwards, it compresses the spring on the surface of the limiting rod 104, putting it in a compressed state. Meanwhile, the spring at the back end of the clamping plate 105 is in a stretched state. Since the contact block 106 is connected to one end of the clamping plate 105, as the limiting ring 103 descends, it causes the clamping plate 105 and the contact block 106 to descend together, causing the contact block 106 to leave the interior of the mounting ring 102. At this time, the clamping... When the spring at the back end of the holding plate 105 loses the pressure from the inner wall of the mounting ring 102, the spring at the back end of the clamping plate 105 rebounds and pulls the clamping plate 105 toward the limiting ring 103. At this time, the test pen is inserted into the limiting ring 103 and the sleeve 101. Then, the spring compressed on the surface of the limiting rod 104 is released from the limiting ring 103, causing the limiting ring 103 to reset and move upward. At the same time as the limiting ring 103 resets and moves upward, the bottom of the mounting ring 102 continues to abut against the inclined surface of the contact block 106, causing the clamping plate 105 to move toward the center inside the limiting ring 103, thereby clamping and limiting the surface of the test pen. After the test pen is positioned inside the sleeve 101, the pressing rod 902 is pressed to move it towards the inside of the placement frame 5. Simultaneously, the pressing rod 902 moves the contact plate 903, which in turn presses the sliding plate 901 away from the inside of the placement frame 5. At this time, the spring at the back of the sliding plate 901 is stretched. The movement of the sliding plate 901 also moves the pressing block 904, which in turn presses the pressure table 906 with its inclined surface, pulling the pull rod 905 away from the adjusting table 6. This causes the rubber block at one end of the pull rod 905 inside the adjusting table 6 to leave the surface of the roller 8, allowing the roller 8 to rotate omnidirectionally inside the adjusting table 6. At this time, the spring at the back of the rubber block is compressed, thus adjusting the angle of the sleeve 101. Simultaneously, after the sliding plate 901 leaves the inside of the placement frame 5, the adjusting table 6 can be slid freely inside the placement frame 5 to adjust the distance between the test pens, adapting to the testing needs of different specifications of equipment and avoiding the need for operators to hold the test pen for extended periods. Maintaining a fixed posture and holding the test pen for extended periods can easily lead to hand muscle fatigue and soreness. This fatigue further exacerbates problems such as unstable grip and positioning deviation. After adjusting the test pen to the appropriate position and angle, releasing the pressing lever 902 will cause the spring at the back of the contact plate 903 to automatically reset. Furthermore, the spring at the back of the slide plate 901, after losing tension, will automatically rebound, causing the slide plate 901 to continue contacting the inside of the placement bracket 5, thus limiting the position of the adjustment platform 6. After the slide plate 901 resets, it will press against the block 9. When the inclined surface of 04 loses its contact with the pressure table 906, the pressure table 906 loses its contact force. At this time, the spring at the back end of the rubber block gradually changes from the compressed state to the released state. The force generated by the release of the spring at this time drives it to reset and contact the roller 8, limiting it inside the adjustment table 6. When the detection distance is far, the bolt 4 can be rotated to make its bottom end leave the surface of the slide rod 3. Then the slide rod 3 is slid out inside the extension rod 2. The bolt 4 is rotated again to make its bottom end contact the slide rod 3 again, limiting it inside the extension rod 2.

[0026] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A portable power construction machinery and equipment testing instrument, comprising a housing (1), characterized in that: An extension rod (2) is placed on the back end of the housing (1). A placement frame (5) is installed on the top of the extension rod (2). Two sets of adjustment platforms (6) are slidably limited inside the placement frame (5). Moving rods (7) are installed on the surfaces of the two sets of adjustment platforms (6). Rollers (8) are rotatably connected inside the adjustment platforms (6). A limiting mechanism is provided inside the placement frame (5). A clamping mechanism is provided inside the rollers (8). The limiting mechanism includes a sliding plate (901) that limits sliding on the surface of the moving rod (7), and a pressing rod (902) that limits sliding inside the placement frame (5). The placement frame (5) has a notch inside that limits sliding a contact plate (903). A squeezing block (904) is installed at the end of the sliding plate (901) away from the pressing rod (902). A pull rod (905) is limited sliding inside the adjustment table (6). A pressure table (906) is installed at the end of the pull rod (905) away from the adjustment table (6). The clamping mechanism includes a sleeve (101) installed inside the roller (8), an installation ring (102) installed at the bottom of the sleeve (101), a limiting ring (103) inside the installation ring (102) for limiting sliding, a limiting rod (104) installed at the top of the installation ring (102), a clamping plate (105) inside the limiting ring (103) for limiting sliding laterally, one end of the clamping plate (105) passes through the limiting ring (103) and is fitted with an abutment block (106), a spring is installed at the back end of the clamping plate (105), the other end of the spring is connected to the limiting ring (103), and an inclined surface is provided on the upper surface of the abutment block (106).

2. The portable power construction machinery and equipment testing instrument according to claim 1, characterized in that: The extension rod (2) has a sliding rod (3) inside for limiting sliding. The extension rod (2) has a through threaded hole inside, and a bolt (4) is installed in the threaded hole. One end of the bolt (4) inside the extension rod (2) abuts against the sliding rod (3).

3. The portable power construction machinery and equipment testing instrument according to claim 2, characterized in that: The two sets of adjustment platforms (6) are symmetrically arranged inside the placement frame (5), and the moving rods (7) located on the surfaces of the two sets of adjustment platforms (6) slide within the sliding groove inside the placement frame (5).

4. The portable power construction machinery and equipment testing instrument according to claim 3, characterized in that: The pressing rod (902) is located inside the placement frame (5) and one end is connected to the abutment plate (903). A spring is installed on the surface of the abutment plate (903) near the internal notch of the placement frame (5). The other end of the spring is connected to the inner wall of the notch of the placement frame (5). The other side of the abutment plate (903) abuts against the sliding plate (901). A spring is installed between the sliding plate (901) and the moving rod (7).

5. A portable power construction machinery and equipment testing instrument according to claim 4, characterized in that: The pull rod (905) has a rubber block installed at one end inside the adjustment platform (6). A spring connects the rubber block to the inner wall of the adjustment platform (6). The pressure platform (906) has an arc-shaped semi-circular design at one end near the pull rod (905). The surface of the extrusion block (904) has an inclined surface. The arc-shaped semi-circular design of the pressure platform (906) abuts against the inclined surface of the extrusion block (904).

6. The portable power construction machinery and equipment testing instrument according to claim 1, characterized in that: The limiting ring (103) slides on the surface of the limiting rod (104). A spring is sleeved on the surface of the limiting rod (104). One end of the spring is connected to the protrusion at the bottom of the limiting rod (104), and the other end is connected to the limiting ring (103).

7. A portable power construction machinery and equipment testing instrument according to claim 6, characterized in that: The number of clamping plates (105) is six sets, and the six sets of clamping plates (105) are distributed in a circumferential shape at equal intervals inside the limiting ring (103).

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