An electrical test clip

Abstract

The application discloses a kind of electric power test clamps, it is related to electric power detection technical field.The existing test clamp contact area is small, contact resistance is big, it is easy to heat under large current, and it is poor to the irregular component clamping stability, insufficient general-purpose.The present application includes rhombic linkage, the rhombic linkage is divided into the upper and lower two groups of rhombic linkage oppositely arranged, and the inner periphery is equipped with inner clamping tooth, and the opposite side is equipped with outer clamping tooth;The retaining assembly is connected two groups of rhombic mechanism by first, second support and first, second elastic piece;Control mechanism includes first, second gripping assembly, and two groups of rhombic mechanism are driven parallel opening and closing and synchronous expansion respectively.The present application realizes the parallel compression of outer clamping tooth to sheet-shaped component and the four-point type wrapping locking of inner clamping tooth to special-shaped component by the composite motion of rhombic mechanism parallel opening and closing and synchronous expansion, increases contact area, reduces contact resistance, improves clamping stability and general-purpose.

Description

Technical Field

[0001] This invention relates to the field of power testing technology, and more particularly to a power testing clip. Background Technology

[0002] Currently, power test clips are indispensable wiring tools in power system maintenance, relay protection testing, and laboratory electrical parameter measurement. Traditional test clips (such as alligator clips and snap clips) mostly adopt a lever-type rotating opening and closing structure.

[0003] However, existing power test clips have limited contact area in actual use. When clamping large-diameter cables or flat conductors, the simple lever structure often only has local point or short line contact, resulting in high contact resistance. Under high current testing, it is prone to overheating. For irregularly shaped terminals, contacts, and other components, the clamping stability is also poor. Traditional test clips are prone to slippage and falling off, which is not conducive to flexible application in actual testing. Therefore, those skilled in the art have provided a power test clip to solve the problems mentioned in the background art. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of existing power test clips, which often use a lever-type rotating structure, resulting in small contact area, high contact resistance, easy overheating under high current, poor stability when clamping irregular components, and insufficient versatility. Therefore, this invention proposes a power test clip.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a power testing clamp, comprising: The clamping assembly includes a rhombus linkage mechanism, which is divided into an upper rhombus linkage mechanism and a lower rhombus linkage mechanism arranged opposite to each other. The inner periphery of the rhombus linkage mechanism is provided with inner clamping teeth, and the opposite sides of the upper and lower rhombus linkage mechanisms are provided with outer clamping teeth. The retaining assembly includes a first bracket and a second bracket that are respectively connected to the upper and lower rhomboid linkage mechanisms. The first bracket is provided with a first elastic element for providing deformation-restoring elastic force to the rhomboid linkage mechanism, and the second bracket is provided with a second elastic element for driving the upper and lower rhomboid linkage mechanisms to tend to close together. The control mechanism includes a first gripping component and a second gripping component. The first gripping component is driven to a first support and is used to drive the two sets of diamond-shaped linkage mechanisms to perform parallel opening and closing movements. The second gripping component is driven to a second support and is used to drive the two sets of diamond-shaped linkage mechanisms to perform synchronous expansion and contraction deformation.

[0006] This technical solution uses a first gripping component to drive two sets of upper and lower rhomboid linkage mechanisms to perform parallel opening and closing movements. Utilizing the outer clamping teeth on opposite sides of the two sets of rhomboid mechanisms, flat components such as busbars can be subjected to corresponding parallel clamping. This parallel clamping method ensures stable line-surface contact between the clamping teeth and the object being tested, increasing the contact area and thus reducing contact resistance, effectively suppressing the risk of equipment overheating and burnout under high-current testing environments. The second gripping component drives the two sets of rhomboid linkage mechanisms to synchronously expand and contract, cooperating with the inner clamping teeth on the inner periphery of the rhombus. Under the action of the reset elastic force, a centripetal converging force is generated, forming a four-point, fully enclosed three-dimensional clamping force field. This three-dimensional clamping force field can adaptively conform to the contours of spherical contacts, cylindrical ends, or other irregular components, firmly locking the components within the rhomboid cavity. This effectively avoids the uneven force distribution and slippage phenomena caused by point contact in traditional flat-mouth clamps, significantly improving clamping stability. The first gripping component and the second gripping component can be controlled independently or operated in concert, so that the upper and lower sets of diamond linkage mechanisms can open and close in parallel and expand and retract synchronously. The composite control mode allows a single clamp to adapt to various shapes of terminals such as sheet, column, and ball. The clamping mode can be flexibly switched under one-handed operation, improving the versatility and efficiency of operation in complex power sites.

[0007] As a further description of the aforementioned power test clip: The rhomboid linkage mechanism includes four linkage units of equal length. One end of each linkage unit is rotatably connected to the retaining assembly, and the other end is hinged to the adjacent linkage unit. Each of the connecting rod units is provided with an L-shaped conductive strip. One side of the L-shaped conductive strip extends to the inner periphery of the rhomboid connecting rod mechanism and is provided with inner clamping teeth. The other side of the L-shaped conductive strip extends to the opposite side of the upper and lower rhomboid connecting rod mechanisms and is provided with outer clamping teeth.

[0008] As a further description of the aforementioned power test clip: The connecting rod unit is provided with a mounting groove, and the L-shaped conductive strip is embedded in the mounting groove and detachably connected to the connecting rod unit.

[0009] As a further description of the aforementioned power test clip: Both the inner and outer clamping teeth have a sawtooth, wavy, or staggered trapezoidal structure, with the tips of the inner clamping teeth facing the center of the rhomboid linkage frame and the tips of the outer clamping teeth facing the central reference plane of the two sets of rhomboid linkages.

[0010] As a further description of the aforementioned power test clip: The first support includes a first frame rod with one end hinged to the connecting rod unit. The end of the first frame rod away from the connecting rod unit is integrally formed with a first connecting block. The first connecting block is connected to a sliding block through a first elastic element. The sliding block and the first connecting block are both slidably mounted on the second support.

[0011] As a further description of the aforementioned power test clip: The first elastic element includes a sleeve fixedly connected to the sliding block, a first sliding rod fixedly connected to the first connecting block is slidably installed inside the sleeve, and a first spring sleeved on the outer periphery of the sleeve is fixedly installed between the sliding block and the first connecting block.

[0012] As a further description of the aforementioned power test clip: The second support includes a second frame rod with one end hinged to the linkage unit, and a second connecting block is integrally formed at the end of the second frame rod away from the linkage unit; A first vertical rod that slides through the first connecting block is fixedly installed on the second connecting block, and a second sliding rod is fixedly installed on its side. A positioning tube is slidably sleeved on the outer ring of the second sliding rod, and a second vertical rod that slides through the sliding block is fixedly installed on the positioning tube.

[0013] As a further description of the aforementioned power test clip: The second elastic element includes a first vertical rod and a stop block that can be detachably installed at the top of the second vertical rod. A second spring that is sleeved on the outer ring of the first vertical rod is fixedly installed between the stop block and the first connecting block.

[0014] As a further description of the aforementioned power test clip: The first gripping assembly includes a handle fixedly mounted on a positioning tube, with a folding plate hinged to the top of the handle, one end of which abuts against the bottom of a sliding block.

[0015] As a further description of the aforementioned power test clip: The second grip assembly includes two sets of grip bars hinged to the bottom of the handle. One end of each grip bar is integrally formed with a lever, and the lever has a limiting groove inside for the bottom end of the first vertical bar to slide.

[0016] Beneficial effects: By setting up a diamond-shaped linkage mechanism that can open and close in parallel, and the diamond-shaped linkage mechanism itself can also be adjusted in retraction and expansion, the upper and lower diamond-shaped linkage mechanisms are kept in a parallel opening and closing state through the coordination of the control mechanism and the holding component. Combined with the symmetrical pointing design of the external clamping teeth, the clamp and the sheet component can achieve a stable and reliable clamping. The large contact area between the clamp and the component and the stable clamping can greatly reduce the contact resistance, which can fundamentally solve the hidden dangers of equipment overheating and burning caused by poor contact in high current testing environment, and ensure the accuracy and safety of electrical parameter measurement data. The second gripping component drives the rhomboid linkage mechanism frame to undergo proportional deformation in the lateral and longitudinal directions. The inner clamping teeth distributed on the inner periphery of the rhombus generate a centripetal converging force under the action of the reset elastic force, forming a four-point, fully enclosed three-dimensional clamping force field. Whether it is a spherical contact, a cylindrical end, or other irregular components, the clamping structure can adaptively conform to its outer contour and securely lock it in the rhomboid cavity. The fully enclosed locking effect is significantly better than the unidirectional pressure of traditional clamps, eliminating the risk of short circuits or test interruptions caused by clamp detachment during testing. The power test clamp demonstrates strong versatility in practical applications and is flexibly applicable to different operating environments. Attached Figure Description

[0017] Figure 1 This is a first schematic diagram of the overall structure of the present invention; Figure 2 This is a second schematic diagram of the overall structure of the present invention; Figure 3 This is a first schematic diagram of the lower rhomboid linkage mechanism and its connecting structure of the present invention; Figure 4 This is a second schematic diagram of the lower rhomboid linkage mechanism and its connecting structure of the present invention; Figure 5 This is a first schematic diagram of the upper rhomboid linkage mechanism and its connecting structure of the present invention; Figure 6 This is a second schematic diagram of the upper rhomboid linkage mechanism and its connecting structure of the present invention; Figure 7 This is a first schematic diagram of the control mechanism and its connection structure of the present invention; Figure 8 This is a second schematic diagram of the control mechanism and its connection structure of the present invention.

[0018] Legend: 10. Clamping assembly; 101. Diamond-shaped linkage mechanism; 1011. Linkage unit; 1012. L-shaped conductive strip; 102. Inner clamping teeth; 103. Outer clamping teeth; 11. Mounting groove; 20. Holding assembly; 201. First bracket; 2011. First support rod; 2012. First connecting block; 2013. Sliding block; 202. Second bracket; 2021. Second support rod; 2022. Second connecting block; 2023. First vertical rod; 2024. Second sliding rod; 2025. Positioning tube; 2026. Second vertical rod; 203. First elastic element; 2031. Sleeve; 2032. First sliding rod; 2033. First spring; 204. Second elastic element; 2041. Stop block; 2042. Second spring; 30. Control mechanism; 301. First grip assembly; 3011. Handle; 3012. Folding plate; 302. Second grip assembly; 3021. Grip bar; 3022. Lever; 3023. Limiting groove. Detailed Implementation

[0019] The technical power test clip of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1-2 As shown, the power test clamp provided by the present invention includes a clamping assembly 10, a holding assembly 20, and a control mechanism 30. The clamping assembly 10 is composed of two sets of upper and lower rhomboid linkage mechanisms 101 arranged opposite each other. The inner periphery of each rhomboid linkage mechanism 101 is provided with inner clamping teeth 102, and the opposite sides of the two sets of rhomboid linkage mechanisms 101 are provided with outer clamping teeth 103. To realize the upper and lower clamping and synchronous expansion and contraction of the two sets of rhomboid linkage mechanisms 101, the holding assembly 20 includes a first bracket 201 and a second bracket 202 respectively connecting the upper and lower rhomboid linkage mechanisms. The first bracket 201 is provided with a first elastic element 203 for providing deformation and restoring elastic force to the rhomboid linkage mechanism 101, and the second bracket 202 is provided with a second elastic element 204 for driving the upper and lower sets of rhomboid linkage mechanisms 101 to tend to close together. To enable flexible adjustment of the two sets of rhomboid linkage mechanisms 101, the control mechanism 30 includes a first gripping component 301 and a second gripping component 302. The first gripping component 301 is driven to the first bracket 201 and is used to drive the two sets of rhomboid linkage mechanisms 101 to perform parallel opening and closing movements. The second gripping component 302 is driven to the second bracket 202 and is used to drive the two sets of rhomboid linkage mechanisms 101 to perform synchronous expansion and contraction deformation.

[0021] When it is necessary to clamp the end of a wire or other cylindrical component, the operator can squeeze the second gripping component 302. This component is used to overcome the elastic force of the first elastic element 203, so that the two lateral vertices of the rhomboid linkage mechanism 101 expand outward along the same straight line, thereby driving the rhomboid frame to undergo lateral tensile deformation. The aforementioned lateral direction is the line connecting the two active displacement nodes of the rhomboid linkage mechanism 101, and the longitudinal direction is the line connecting the two passive displacement nodes of the rhomboid linkage mechanism 101. When the second gripping component 302 drives the rhomboid frame to undergo lateral tensile deformation, its inner circle expands to form an opening of a certain size. The opening can be directly fitted onto the end of the component to be clamped. When the second gripping component 302 is released, the inner clamping teeth 102 distributed on the inner periphery of the rhombus converge synchronously towards the geometric center, forming a concentrated wrapping structure. The inner clamping teeth 102 can be used to achieve a four-point stable clamping and locking of the outer periphery of the component.

[0022] When the operator presses the first grip component 301, this component overcomes the elastic force of the second elastic element 204, driving the first support 201 to move vertically upward relative to the second support 202. The upper rhomboid linkage mechanism remains parallel to the lower rhomboid linkage mechanism during its movement. When the first grip component 301 is released, under the restoring action of the elastic force of the second elastic element 204, the two sets of rhomboid linkage mechanisms 101 can use the outer clamping teeth 103 to stably contact and clamp the busbar or other sheet-like components placed between them. This ensures line-to-surface contact between the clamping teeth and the object under test, greatly reducing contact resistance and effectively suppressing the heating phenomenon of the equipment under high current testing environment.

[0023] Simultaneously, the first gripping component 301 and the second gripping component 302 can also expand synchronously under the control of the operator. The two sets of expanded and separated rhomboid linkage mechanisms 101 can be fitted onto the spherical contact or other irregular components. When the external force on the control mechanism 30 is removed, the automatic reset of the elastic element can realize the composite movement of clamping the gripping components 10 vertically and closing around the perimeter. The inner clamping teeth 102 distributed on the inner periphery of the rhombus and the outer clamping teeth 103 on the opposite side together form a multi-point, fully enclosed three-dimensional clamping force field. The three-dimensional clamping force field can adaptively conform to the contour of the spherical or irregular component, and firmly lock the component in the cavity formed by the two sets of rhomboid linkage mechanisms. This effectively avoids the uneven force and slippage caused by point contact when clamping spherical surfaces by traditional flat-jaw clamps, and significantly improves the mechanical connection strength and electrical contact stability during power testing.

[0024] In one embodiment, such as Figures 1-6As shown, specifically, the rhombic linkage mechanism 101 includes four linkage units 1011 of equal length. One end of each linkage unit 1011 is rotatably connected to the retaining assembly 20, and the other end is hinged to the adjacent linkage unit 1011. Each linkage unit 1011 is provided with an L-shaped conductive strip 1012. One side of the L-shaped conductive strip 1012 extends to the inner periphery of the rhombic linkage mechanism 101 and is provided with an inner clamping tooth 102. The other side of the L-shaped conductive strip 1012 extends to the opposite side of the upper and lower sets of rhombic linkage mechanisms 101 and is provided with an outer clamping tooth 103. When the control mechanism 30 transmits driving force, the linkage unit 1011 rotates around its hinge point. Since one end of the linkage unit 1011 is rotatably connected to the retaining assembly 20 and the other end is freely hinged to the adjacent linkage, this constraint relationship forces the rhombic linkage mechanism to extend and retract along its central axis of symmetry when subjected to force, thereby ensuring the symmetry of the clamping space during deformation.

[0025] As the rhomboid linkage mechanism contracts laterally, the L-shaped conductive strip 1012 extends to the inner periphery and converges towards the center, allowing the inner clamping teeth 102 to clamp the central component from four directions. The L-shaped conductive strip 1012 extends to the opposite side, where the outer clamping teeth 103 move up and down with the entire clamping assembly 10, achieving parallel clamping of the busbar-type components between the two sets of rhomboid linkage mechanisms. The linkage unit 1011 has a mounting groove 11, within which the L-shaped conductive strip 1012 is embedded and detachably connected. As the direct carrier of electrical contact, the L-shaped conductive strip 1012, embedded within the linkage unit 1011, is protected by the mechanical strength of the linkage and can withstand significant clamping pressure without easily deforming. Simultaneously, the L-shaped structure increases the cross-sectional area of ​​the conductive strip, which helps reduce the conductor's own resistance and minimizes heat generation during high current flow.

[0026] The entire electrical test clamp can be made of insulating material, while the L-shaped conductive strips 1012 are made of conductive material. The L-shaped conductive strips 1012 can be electrically connected to the terminals on the testing equipment through conductive wires. The conductive wires can be flexible wires or copper braided wires. The entire electrical test clamp can also be made of conductive material, and the outer ring of its control mechanism 30 can be fitted with corresponding insulating material. The electrical test clamp, which is made entirely of conductive material, can be electrically connected to the terminals on the testing equipment through the control mechanism 30.

[0027] When the inner clamping teeth 102 and the outer clamping teeth 103 are designed as a sawtooth / trapezoidal structure, they can provide extremely strong mechanical biting force, which is especially suitable for metal terminals with an oxide layer on the surface. By piercing the oxide layer with the tooth tips, low impedance of electrical contact is ensured. When the inner clamping teeth 102 and the outer clamping teeth 103 are designed as a wave structure, they can provide a larger contact area, which is suitable for delicate wires with soft or easily damaged surfaces. While ensuring stable clamping, mechanical damage to the cable insulation or inner core is avoided. Among them, the tooth tips of the inner clamping teeth 102 face the center of the rhomboid frame, and the tooth tips of the outer clamping teeth 103 face the central reference plane of the two sets of rhomboid linkage mechanisms 101.

[0028] In one embodiment, such as Figures 1-8 As shown, specifically, the first support 201 includes a first rod 2011 hinged at one end to the connecting rod unit 1011. A first connecting block 2012 is integrally formed at the end of the first rod 2011 away from the connecting rod unit 1011. The first connecting block 2012 is connected to a sliding block 2013 via a first elastic element 203. Both the sliding block 2013 and the first connecting block 2012 are slidably mounted on the second support 202. Correspondingly, the first elastic element 203 includes a sleeve 2031 fixedly connected to the sliding block 2013. A first sliding rod 2032 fixedly connected to the first connecting block 2012 is slidably mounted inside the sleeve 2031. A first spring 2033, sleeved on the outer periphery of the sleeve 2031, is fixedly mounted between the sliding block 2013 and the first connecting block 2012.

[0029] When the operator applies force through the first gripping component 301, the thrust is transmitted to the sliding block 2013. Since the sliding block 2013 and the first connecting block 2012 are both slidably mounted on the second bracket 202, the constraint of the second bracket 202 ensures the axial consistency of the power input, which can cause the upper and lower rhomboid linkage mechanisms to produce relative displacement. The upper rhomboid linkage mechanism can compress the second elastic element 204 to store force. The first elastic element 203 is provided to provide elastic force for the expansion and contraction deformation of the rhomboid linkage mechanism 101 itself.

[0030] Based on the above embodiments, specifically, the second support 202 includes a second support rod 2021 with one end hinged to the connecting rod unit 1011, and a second connecting block 2022 integrally formed at the end of the second support rod 2021 away from the connecting rod unit 1011; a first vertical rod 2023 that slides through the first connecting block 2012 is fixedly installed on the second connecting block 2022, and a second sliding rod 2024 is fixedly installed on its side; a positioning tube 2025 is slidably sleeved on the outer ring of the second sliding rod 2024, and a second vertical rod 2026 that slides through the sliding block 2013 is fixedly installed on the positioning tube 2025. Correspondingly, the second elastic member 204 includes a stop block 2041 that is detachably installed at the top of the first vertical rod 2023 and the second vertical rod 2026, and a second spring 2042 that is sleeved on the outer ring of the first vertical rod 2023 is fixedly installed between the stop block 2041 and the first connecting block 2012.

[0031] When the operator applies force through the second grip component 302, the thrust is transmitted to the first vertical rod 2023. The first vertical rod 2023 drives the first connecting block 2012, the first support rod 2011, the second connecting block 2022, and the second support rod 2021 to move. The first connecting block 2012 drives the first slide rod 2032 to slide inside the sleeve 2031 and the first spring 2033 to store force. The second connecting block 2022 drives the second slide rod 2024 to slide inside the positioning tube 2025. The relative movement of the two sets of first support rods 2011 can pull the upper rhomboid linkage mechanism to deform, and the two second support rods 2021 can pull the lower rhomboid linkage mechanism to deform.

[0032] When the first gripping component 301 pushes the sliding block 2013 to slide on the second vertical rod 2026, the sliding block 2013 drives the first connecting block 2012 to slide on the first vertical rod 2023 through the first elastic elements 203 on both sides, realizing the separation and engagement of the upper and lower rhomboid linkage mechanism. The above-mentioned elastic support structure not only gives the power test clip a better adaptive clamping ability for irregularly shaped components, but also realizes flexible buffering of clamping force and automatic reset after force release through the energy feedback mechanism of the first spring 2033 and the second spring 2042, greatly optimizing the convenience of one-handed operation.

[0033] In one embodiment, such as Figures 1-2 and Figures 7-8 As shown, specifically, the first gripping assembly 301 includes a handle 3011 fixedly mounted on the positioning tube 2025. A folding plate 3012 is hinged to the top of the handle 3011, and one end of the folding plate 3012 abuts against the bottom of the sliding block 2013. When the operator grips the handle 3011 and presses the folding plate 3012, the folding plate 3012 rotates around its hinge point. The power end of the folding plate 3012 directly abuts against the bottom of the sliding block 2013, using the lever principle to convert the horizontal or oblique gripping force into an upward thrust; thereby driving the upper diamond linkage mechanism to move upward, realizing the parallel opening of the clamp.

[0034] Specifically, the second grip assembly 302 includes two sets of grip bars 3021 hinged to the bottom of the handle 3011. One end of each grip bar 3021 has an integrally formed lever 3022. The lever 3022 has a limiting groove 3023 inside for the bottom end of the first vertical rod 2023 to slide. When the operator squeezes the two sets of grip bars 3021 at the bottom of the handle 3011, the grip bars 3021 drive the lever 3022 at their top to swing synchronously. The bottom end of the first vertical rod 2023 is restricted by the limiting groove 3023 inside the lever 3022. As the lever 3022 moves, the groove wall of the limiting groove 3023 can push and pull the first vertical rod 2023, driving the first vertical rod 2023 to move laterally, which can drive the expansion and contraction of the rhomboid linkage mechanism 101.

[0035] The control of the first grip component 301 and the second grip component 302 is concentrated on a composite hand grip. The upper folding plate 3012 can be controlled by the thumb and forefinger or four fingers, while the lower grip bar 3021 is controlled by the remaining fingers. This spatial layout is ergonomic, allowing the operator to adjust the height of the clamp and the diamond-shaped opening simultaneously or separately with one hand without switching grip postures, greatly improving work efficiency in complex power field environments.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the present invention's technical specifications and inventive concept, should be covered within the scope of protection of the present invention.

Claims

1. A power testing clip, characterized in that, include: The clamping assembly (10) includes a rhombus linkage mechanism (101), which is divided into an upper rhombus linkage mechanism and a lower rhombus linkage mechanism arranged opposite to each other. The inner periphery of the rhombus linkage mechanism (101) is provided with inner clamping teeth (102), and the opposite sides of the upper and lower rhombus linkage mechanisms (101) are provided with outer clamping teeth (103). The retaining assembly (20) includes a first bracket (201) and a second bracket (202) that respectively connect the upper and lower rhomboid linkage mechanisms (101). The first bracket (201) is provided with a first elastic element (203) for providing deformation recovery elastic force for the rhomboid linkage mechanism (101). The second bracket (202) is provided with a second elastic element (204) for driving the upper and lower rhomboid linkage mechanisms (101) to tend to close to each other. The control mechanism (30) includes a first gripping component (301) and a second gripping component (302). The first gripping component (301) is connected to the first bracket (201) for driving the upper and lower sets of the rhomboid linkage mechanism (101) to perform parallel opening and closing movements. The second gripping component (302) is connected to the second bracket (202) for driving the two sets of rhomboid linkage mechanism (101) to perform synchronous expansion and contraction deformation.

2. The power test clamp according to claim 1, characterized in that: The rhomboid linkage mechanism (101) includes four linkage units (1011) of equal length. One end of the linkage unit (1011) is rotatably connected to the retaining assembly (20), and the other end is hinged to the adjacent linkage unit (1011). Each of the connecting rod units (1011) is provided with an L-shaped conductive strip (1012). One side of the L-shaped conductive strip (1012) extends to the inner periphery of the rhomboid connecting rod mechanism (101) and is provided with an inner clamping tooth (102). The other side of the L-shaped conductive strip (1012) extends to the opposite side of the upper and lower rhomboid connecting rod mechanisms (101) and is provided with an outer clamping tooth (103).

3. The power test clamp according to claim 2, characterized in that: The connecting rod unit (1011) is provided with a mounting groove (11), and the L-shaped conductive strip (1012) is embedded in the mounting groove (11) and is detachably connected to the connecting rod unit (1011).

4. The power test clamp according to claim 3, characterized in that: Both the inner clamping teeth (102) and the outer clamping teeth (103) are serrated, wavy, or staggered trapezoidal structures, and the tips of the inner clamping teeth (102) face the center of the frame of the rhomboid linkage mechanism (101), while the tips of the outer clamping teeth (103) face the central reference plane of the two sets of rhomboid linkage mechanisms (101).

5. The power test clamp according to claim 2, characterized in that: The first bracket (201) includes a first frame rod (2011) with one end hinged to the connecting rod unit (1011). The first frame rod (2011) has a first connecting block (2012) integrally formed at the end away from the connecting rod unit (1011). The first connecting block (2012) is connected to a sliding block (2013) through a first elastic element (203). The sliding block (2013) and the first connecting block (2012) are both slidably mounted on the second bracket (202).

6. The power test clamp according to claim 5, characterized in that: The first elastic element (203) includes a sleeve (2031) fixedly connected to a sliding block (2013), a first sliding rod (2032) fixedly connected to a first connecting block (2012) is slidably installed inside the sleeve (2031), and a first spring (2033) sleeved on the outer periphery of the sleeve (2031) is fixedly installed between the sliding block (2013) and the first connecting block (2012).

7. The power test clamp according to claim 5, characterized in that: The second support (202) includes a second support rod (2021) with one end hinged to the connecting rod unit (1011), and a second connecting block (2022) is integrally formed at the end of the second support rod (2021) away from the connecting rod unit (1011). The second connecting block (2022) is fixedly installed with a first vertical rod (2023) that slides through the first connecting block (2012), and a second sliding rod (2024) is fixedly installed on its side. The outer ring of the second sliding rod (2024) is slidably fitted with a positioning tube (2025), and a second vertical rod (2026) that slides through the sliding block (2013) is fixedly installed on the positioning tube (2025).

8. The power test clamp according to claim 7, characterized in that: The second elastic element (204) includes a stop (2041) that can be detachably installed at the top of the first vertical rod (2023) and the second vertical rod (2026). A second spring (2042) is fixedly installed between the stop (2041) and the first connecting block (2012) and sleeved on the outer ring of the first vertical rod (2023).

9. The power test clamp according to claim 7, characterized in that: The first grip assembly (301) includes a handle (3011) fixedly mounted on a positioning tube (2025), and a folding plate (3012) is hinged to the top of the handle (3011), one end of which abuts against the bottom of a sliding block (2013).

10. The power test clamp according to claim 9, characterized in that: The second grip assembly (302) includes two sets of grip bars (3021) hinged to the bottom of the handle (3011). One end of each grip bar (3021) is integrally formed with a lever (3022). The lever (3022) has a limiting groove (3023) inside for the bottom end of the first vertical bar (2023) to slide.

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