An electric power test clamp structure and an electric variable measuring device including the structure

Abstract

The invention discloses an electric power test clamp structure and an electric variable measuring device including the structure, which relates to the technical field of electric variable measurement, and comprises a sleeve, wherein a retaining ring is arranged inside the sleeve, a docking seat is arranged on the inner end surface of the sleeve, a support is arranged at the end of the sleeve, a lower clamping arm is arranged at the bottom of the support, a pin is rotatably connected to the top of the side surface of the support, an upper clamping arm is fixedly sleeved on the pin, a limiting unit is arranged on the top of the sleeve, an auxiliary unit is arranged on the upper clamping arm, and a driving unit for driving the pin to rotate is arranged on one side of the support. The invention realizes two detection modes of interference and clamping, increases the scope of application, realizes remote clamping operation, prevents electric shock accidents, and can adjust the clamping force according to the size of the piece to be tested, effectively preventing loosening. In addition, in the event of an emergency such as a fire, the clamping part can be quickly separated from the piece to be tested, and the detection is interrupted in time.

Description

Technical Field

[0001] The invention relates to the technical field of electric variable measurement, in particular to an electric power test clip structure and an electric variable measuring device comprising the structure. Background Art

[0002] Electrical variable meters usually refer to measuring instruments that compare the measured electrical quantity or electrical parameters with electrical standards or provide accurate ratios. These instruments are widely used in scientific research, value transfer and industrial testing. They are an important part of the field of measurement and testing. According to different measurement requirements and the type of measured electrical quantity, they are widely used to monitor key parameters such as voltage, current and resistance of power systems to ensure the stable operation of power systems.

[0003] A Chinese patent with application number 2022110221912 discloses a handheld electronic device for measuring electrical variables and an electrical variable measuring method, which relates to the technical field of electrical variable measuring devices, including a measuring clamp assembly and a steering assembly. The measuring clamp assembly includes a measuring clamp body, an inner cavity, a variable recording module and a Bluetooth transmission module. One side of the variable recording module is connected to the Bluetooth transmission module through a wire, a signal conversion module is arranged inside the measuring instrument body, the steering assembly is connected to the surface of the measuring instrument body, and the display screen is connected to the signal conversion module through a wire, but detection can only be performed by clamping, which makes detection difficult when the test piece cannot be clamped.

[0004] During use, the measuring clamp needs to be manually held to clamp on the live parts to be tested, which is very likely to cause electric shock accidents and poses a safety hazard. In addition, in actual use, it is inconvenient to adjust the clamping force according to the size of the part to be tested, resulting in looseness when testing small-sized parts to be tested, which will cause poor contact. In addition, during the measurement process, in the event of an emergency such as a fire due to an operating error or a short circuit, the clamping part cannot be disengaged in time and the test cannot be interrupted. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide an electric test clamp structure and an electric variable measuring device including the structure, which realizes two detection modes of interference and clamping, increases the scope of application, and realizes remote clamping operation to prevent electric shock accidents. The clamping force can be adjusted according to the size of the piece to be tested to effectively prevent loosening. In addition, in the event of an emergency such as a fire, the clamping part can be quickly detached from the piece to be tested and the detection can be interrupted in time, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric power test clamp structure, used for an electric variable measuring instrument, comprising a sleeve, a retaining ring is provided inside the sleeve, a docking seat is provided on the inner end surface of the sleeve, a support is provided at the end of the sleeve, a lower clamping arm is provided at the bottom of the support, a pin is rotatably connected to the top of the side of the support, an upper clamping arm is fixedly sleeved on the pin, a torsion spring is sleeved on the end of the pin, and both ends of the torsion spring are fixedly connected to the pin and the side of the support respectively;

[0007] A limiting unit is provided on the top of the sleeve, an auxiliary unit is provided on the upper clamping arm, and a driving unit for driving the pin shaft to rotate is provided on one side of the support;

[0008] The limiting unit comprises a guide hole and a transmission rod, wherein the guide hole is opened at the end of the sleeve, a wedge block passes through the guide hole, the transmission rod is movably arranged on the top of the sleeve through a hinge seat, and an elastic member is arranged between the bottom surface of the transmission rod and the sleeve;

[0009] The auxiliary unit comprises a mounting groove, an elastic block is arranged inside the mounting groove through a fixing plate, and a friction block is arranged at the bottom of the elastic block;

[0010] The auxiliary unit achieves fast clamping by cooperating with the driving unit, and achieves rapid separation from the workpiece to be tested when feeding occurs through the coordination among the limiting unit, the auxiliary unit and the driving unit.

[0011] Furthermore, a docking groove is provided at the end of the docking seat, arc grooves are provided on the relative surfaces of the upper clamping arm and the lower clamping arm, tooth seats are provided on both sides of the arc groove on the lower clamping arm, and a shift block is provided at one end of the upper clamping arm close to the sleeve, and the docking groove is electrically connected to the tooth seat.

[0012] Furthermore, the top end of the wedge block is fixedly connected to the end of the transmission rod, and the top of one end of the transmission rod close to the shift block and the bottom of the shift block are both provided with abutment blocks.

[0013] Furthermore, the mounting groove is provided in the middle of the upper clamping arm, the elastic block is a hollow structure, and an air guide tube is provided on the top of the elastic block.

[0014] Further, the driving unit includes a connecting rod, a telescopic tube is provided at the bottom of the side of the connecting rod, the end of the telescopic tube is arranged on the side of the support through a mounting seat, the end of the mounting seat is provided with a connecting tube connected to the inside of the telescopic tube, the end of the connecting tube is provided with an adjusting cylinder, a movable plug is slidably fitted inside the adjusting cylinder, a push-pull rod is provided at the top of the movable plug, and a locking mechanism for locking the push-pull rod is provided at the top of the side of the adjusting cylinder.

[0015] Furthermore, the connecting rod is arranged on the circumferential surface of the pin shaft, the push-pull rod passes through the top end of the adjusting cylinder, the locking mechanism is a stud threadedly connected to the adjusting cylinder, and the top of the adjusting cylinder is fixedly connected to the end of the air guide tube.

[0016] The present invention also provides an electrical variable measuring device, comprising the electrical test clip structure as described above, the electrical variable measuring device also comprising a measuring device body, a plug-in port is provided on the top of the measuring device body, a test cable is plugged into the plug-in port, an insulating handle is provided at the end of the test cable, a test rod is provided at the end of the insulating handle, and the test rod is electrically connected to the test cable.

[0017] Preferably, a test contact is provided at the end of the test rod, a ring is movably sleeved on the test rod, and a reset spring is sleeved at a position between the ring and the end of the insulating handle on the test rod.

[0018] Preferably, a limit plate is fixedly sleeved on one side of the insulating handle close to the test contact, and a slot cooperating with the wedge block is provided on the insulating handle at a position between the limit plate and the test rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When the upper clamping arm and the lower clamping arm are combined, the stud is always threadedly connected to the side of the adjusting tube to seal the top of the adjusting tube. When the movable plug moves toward the top, the gas at the top is squeezed into the elastic block through the air guide tube, so that the elastic block expands, thereby increasing the clamping force of the friction block on the workpiece to be tested, and improving stability when clamping and measuring small-sized workpieces to be tested.

[0021] 2. When an emergency occurs during the measurement process of the present invention, the stud is unscrewed, the twisted torsion spring is reset, and the upper clamping arm and the lower clamping arm release the clamping of the workpiece to be tested. Due to the elasticity of the torsion spring itself, the upper clamping arm continues to rotate a certain distance after being reset, so that the upper resistance block squeezes the lower resistance block, and the end of the transmission rod away from the wedge block is squeezed downward, so that the bottom end of the wedge block is disengaged from the slot, and the reset spring is quickly reset to achieve the rapid separation of the test contact and the docking seat, so that the clamping of the workpiece to be tested can be quickly released and the measurement can be interrupted in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the clamping part of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure of the detection part of the present invention;

[0025] Figure 4 It is a schematic diagram of the local structure of the clamping part of the present invention;

[0026] Figure 5 It is a schematic diagram of the local structure of the driving unit of the present invention;

[0027] Figure 6 It is a schematic diagram of the cross-sectional structure of the clamping part of the present invention.

[0028] In the figure: 1. sleeve; 101. retaining ring; 102. docking seat; 103. docking groove; 104. support; 105. lower clamping arm; 106. pin; 107. upper clamping arm; 108. shift block; 109. torsion spring; 110. gear seat; 2. limit unit; 201. guide hole; 202. hinge seat; 203. transmission rod; 204. wedge block; 205. elastic member; 206. abutment block; 3. auxiliary unit; 301. mounting groove; 302. fixing plate; 303. elastic block; 304, friction block; 305, air guide tube; 4, drive unit; 401, connecting rod; 402, mounting seat; 403, telescopic tube; 404, connecting tube; 405, adjusting cylinder; 406, movable plug; 407, push-pull rod; 408, stud; 5, measuring instrument body; 501, plug port; 502, test cable; 503, insulating handle; 504, test rod; 505, test contact; 506, collar; 507, reset spring; 508, limit plate; 509, slot. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-6 The present invention provides an electric variable measuring device, including an electric test clamp structure. The electric variable measuring device also includes a measuring device body 5. A plug-in port 501 is provided on the top of the measuring device body 5. A test cable 502 is plugged into the plug-in port 501. An insulating handle 503 is provided at the end of the test cable 502. A test rod 504 is provided at the end of the insulating handle 503. The test rod 504 is electrically connected to the test cable 502.

[0031] A test contact 505 is provided at the end of the test rod 504, and a ring 506 is movably sleeved on the test rod 504. A reset spring 507 is sleeved at a position between the ring 506 and the end of the insulating handle 503 on the test rod 504. The ring 506 and the reset spring 507 are made of insulating material. The setting of the reset spring 507 prevents the cross-contact between the test rods 504 on each insulating handle 503, which may cause short-circuit damage to the measuring device body 5, thereby avoiding damage to the measuring device body 5. A limit plate 508 is fixedly sleeved on one side of the insulating handle 503 close to the test contact 505, and a slot 509 cooperating with the wedge block 204 is provided on the insulating handle 503 between the limit plate 508 and the test rod 504.

[0032] In addition, the present invention also provides an electric power test clamp structure, which is used for the above-mentioned electric variable measuring instrument, including a sleeve 1, the sleeve 1 is used to be sleeved with the end of the insulating handle 503, a retaining ring 101 is provided inside the sleeve 1, the retaining ring 101 is used to cooperate with the sleeve ring 506 to realize the compression energy storage of the reset spring 507, the inner end face of the sleeve 1 is provided with a docking seat 102, the end of the docking seat 102 is provided with a docking groove 103, the docking groove 103 is used to correspond with the test contact 505 to realize the electrical conduction between the measuring device body 5 and the gear seat 110, the end of the sleeve 1 is provided with a support 104, the bottom of the support 104 is provided with a lower clamping arm 105, the top of the side of the support 104 is rotatably connected with a pin shaft 106, the pin shaft 106 is fixedly sleeved with an upper clamping arm 107, and the upper clamp The holding arm 107 and its attached parts are all made of insulating materials. The relative surfaces of the upper clamping arm 107 and the lower clamping arm 105 are provided with arc grooves. Tooth seats 110 are provided on both sides of the arc groove on the lower clamping arm 105. The docking groove 103 is electrically connected to the tooth seat 110. The end of the pin shaft 106 is sleeved with a torsion spring 109. The two ends of the torsion spring 109 are respectively fixedly connected to the pin shaft 106 and the side of the support 104. When the torsion spring 109 is not twisted, the upper clamping arm 107 and the lower clamping arm 105 are in an open state. When the pin shaft 106 is rotated, the torsion spring 109 is twisted. At this time, the upper clamping arm 107 and the lower clamping arm 105 are closed to clamp the workpiece to be tested. When the workpiece to be tested is clamped, the tooth seat 110 directly contacts the workpiece to be tested to measure the electrical variable.

[0033] A limit unit 2 is provided at the top of the sleeve 1. The limit unit 2 includes a guide hole 201 and a transmission rod 203. The guide hole 201 is opened at the end of the sleeve 1. A wedge block 204 runs through the guide hole 201. The top of the wedge block 204 is fixedly connected to the end of the transmission rod 203. The transmission rod 203 is movably arranged at the top of the sleeve 1 through a hinge seat 202. An elastic member 205 is provided between the bottom surface of the transmission rod 203 and the sleeve 1. The elastic member 205 is preferably a memory alloy. When the end of the insulating handle 503 is inserted into the sleeve 1, the test contact 505 passes through the center hole of the retaining ring 101. In this process, the collar 506 is held by the retaining ring 101. The reset spring 507 is compressed and in an energy storage state. When the insulating handle 503 contacts the inclined surface of the wedge block 204, the wedge block 204 is squeezed upward, and the end of the transmission rod 203 away from the support 104 is tilted, and the elastic member 205 is stretched. When the insulating handle 503 continues to be fed until the bottom end of the wedge block 204 corresponds to the slot 509, the elastic member 205 pulls the transmission rod 203 to reset, and the bottom end of the wedge block 204 corresponds to the slot 509 to achieve the limiting of the insulating handle 503. At this time, the test contact 505 and the docking slot 103 complete the docking cooperation, and the electrical conduction between the test contact 505 and the tooth seat 110 is achieved.

[0034] An auxiliary unit 3 is provided on the upper clamping arm 107, and the auxiliary unit 3 includes a mounting groove 301. The mounting groove 301 is opened in the middle of the upper clamping arm 107. An elastic block 303 is provided inside the mounting groove 301 through a fixing plate 302. The elastic block 303 is preferably made of rubber material. A friction block 304 is provided at the bottom of the elastic block 303. Initially, the friction block 304 extends out of the mounting groove 301 toward the bottom of the upper clamping arm 107. In this way, when the upper clamping arm 107 and the lower clamping arm 105 are closed to clamp the workpiece to be measured, the elastic block 303 is elastically compressed, and the friction block 304 is tightly in contact with the workpiece to be measured. The friction block 304 is used to increase the friction between the workpiece to be measured, thereby improving the stability of the clamping of the workpiece to be measured and preventing sliding from affecting the measurement results.

[0035] like Figure 5As shown, a driving unit 4 for driving the pin shaft 106 to rotate is provided on one side of the support 104, and the driving unit 4 includes a connecting rod 401, and the connecting rod 401 is provided on the circumferential surface of the pin shaft 106. A telescopic tube 403 is provided at the bottom of the side of the connecting rod 401, and the telescopic tube 403 is made of rubber. The end of the telescopic tube 403 is provided on the side of the support 104 through a mounting seat 402, and the end of the mounting seat 402 is provided with a connecting tube 404 connected to the inside of the telescopic tube 403, and an adjusting cylinder 405 is provided at the end of the connecting tube 404. The adjusting cylinder 405 is closed at both ends, and a movable plug 406 is slidably matched inside the adjusting cylinder 405. A push-pull rod 407 is provided at the top of the movable plug 406, and the push-pull rod 407 passes through the top of the adjusting cylinder 405. A locking mechanism for locking the push-pull rod 407 is provided on the top of the side of the adjusting cylinder 405. The locking mechanism is connected to the adjusting cylinder 4 05 threaded stud 408, stud 408 corresponds to the position of push-pull rod 407, by pulling push-pull rod 407, movable plug 406 moves upward, negative pressure is generated in the space at the bottom of movable plug 406, and negative pressure is generated through connecting tube 404 to generate negative pressure inside telescopic tube 403, so that telescopic tube 403 contracts and drives connecting rod 401 to rotate, torsion spring 109 is twisted to realize the rotation of pin 106, pin 106 drives upper clamping arm 107 to rotate, so as to realize the closing of upper clamping arm 107 and lower clamping arm 105, at this time, push-pull rod 407 is positioned by tightening stud 408 to keep the closed state of upper clamping arm 107 and lower clamping arm 105, when stud 408 releases the positioning of push-pull rod 407, torsion spring 109 quickly resets, so as to realize the rapid opening of upper clamping arm 107 and lower clamping arm 105.

[0036] The auxiliary unit 3 achieves fast clamping by cooperating with the driving unit 4, and achieves rapid separation from the test piece when feeding occurs through the coordination among the limiting unit 2, the auxiliary unit 3 and the driving unit 4.

[0037] When in use, the end of the test cable 502 is plugged into the corresponding plug port 501. When it is necessary to measure by clamping it outside the test piece, first sleeve the sleeve 1 on the end of the insulating handle 503. When sleeved, the test contact 505 is aligned with the center hole of the retaining ring 101 and passes through the retaining ring 101. The sleeve 506 blocks the retaining ring 101 and the reset spring 507 is compressed. During this process, the insulating handle 503 squeezes the wedge block 204 to move upward, and makes the end of the transmission rod 203 close to the support 104 move downward, and the elastic member 205 is in a stretched energy storage state. When the slot 509 corresponds to the wedge block 204, the elastic member 205 drives the transmission rod 203 to reset the wedge block 204 and clamp it in the slot 509, thereby realizing the combination of the insulating handle 503 and the sleeve 1.

[0038] Secondly, place the upper clamping arm 107 and the lower clamping arm 105 in the open state outside the workpiece to be measured, and completely unscrew the stud 408, so that the top of the adjusting cylinder 405 is connected to the outside through the threaded hole, and by pulling the push-pull rod 407, a negative pressure is generated on the side of the adjusting cylinder 405 close to the connecting tube 404, and the telescopic tube 403 contracts to drive the connecting rod 401 to rotate, and the pin 106 drives the upper clamping arm 107 to rotate, and the torsion spring 109 is twisted and contracted in an energy storage state, so that the upper clamping arm 107 and the lower clamping arm 105 are tightly closed, so that the gear seat 110 and the friction block 304 are clamped on the outside of the workpiece to be measured, and the elastic block 303 is compressed at the same time, and then the stud 408 is screwed in and tightly fixed on the side of the push-pull rod 407 to fix the position of the movable plug 406, complete the clamping of the workpiece to be measured, and open the measuring device body 5 to measure the electrical variable after debugging.

[0039] It should be noted that when the outside of the test piece is contaminated with dirt, resulting in poor contact between the tooth seat 110 and the test piece, the upper clamping arm 107 can be rotated by pulling the connecting tube 404, and the rotation of the friction block 304 can be used to grind the outside of the test piece to remove dirt, thereby ensuring normal conduction between the tooth seat 110 and the test piece.

[0040] When the measurement is completed and the clamping of the workpiece to be measured needs to be released, the stud 408 is unscrewed, the torsion spring 109 is quickly reset, and the movable plug 406 is reset to the bottom of the adjustment tube 405, so that the upper clamping arm 107 and the lower clamping arm 105 are quickly opened, and the clamping of the workpiece to be measured can be released.

[0041] When the sleeve 1 needs to be removed, the bottom end of the wedge block 204 at the other end can be disengaged from the slot 509 by pressing one end of the transmission rod 203 close to the support 104. At this time, the reset spring 507 in the compressed energy storage state quickly extends and resets, so that the insulating handle 503 quickly disengages from the sleeve 1, completing the separation of the sleeve 1 and the insulating handle 503.

[0042] However, when the size of the workpiece to be tested is small, even if the friction block 304 and the tooth seat 110 tightly clamp the workpiece to be tested, the reverse force of the elastic block 303 cannot fully act on the workpiece to be tested, which will still cause the clamping to be loose. Therefore, the following improvements are made:

[0043] The elastic block 303 is a hollow structure. An air guide tube 305 is provided on the top of the elastic block 303 . The top of the regulating tube 405 is fixedly connected to the end of the air guide tube 305 .

[0044] In the process of pulling the push-pull rod 407 to shrink the telescopic tube 403 and drive the upper clamping arm 107 and the lower clamping arm 105 to merge, the stud 408 is always threadedly connected to the side of the adjusting tube 405. When the movable plug 406 moves toward the top of the adjusting tube 405, the gas at the top of the movable plug 406 is discharged into the air guide tube 305 and injected into the elastic block 303. The elastic block 303 expands and drives the friction block 304 to move toward one side of the workpiece to be tested, thereby achieving further close contact between the friction block 304 and the workpiece to be tested and improving the stability of clamping.

[0045] It is worth noting that while the movable plug 406 is moving upward to merge the upper clamping arm 107 with the lower clamping arm 105, the elastic block 303 is expanded, further making the friction block 304 tightly contact the test piece. In this process, after the telescopic tube 403 contracts to the continuing state, since the telescopic tube 403 is made of rubber and has a certain toughness, when the movable plug 406 continues to move upward, the telescopic tube 403 will contract into a flat shape, providing conditions for the movable plug 406 to move upward to continue to supply air to the elastic block 303.

[0046] Therefore, the present invention further improves the tightness of clamping the test piece when clamping a small-volume test piece through the coordinated linkage between the driving unit 4 and the auxiliary unit 3, thereby ensuring the stability of the clamping of the test piece.

[0047] In addition, when a fire or other emergency occurs at the clamping part of the test piece, it is difficult to release the clamp in time and quickly interrupt the measurement, which will cause serious consequences. Therefore, the following improvements are made:

[0048] A shift block 108 is provided at one end of the upper clamping arm 107 close to the sleeve 1, and a resistance block 206 is provided at the top of one end of the transmission rod 203 close to the shift block 108 and at the bottom of the shift block 108. When the upper clamping arm 107 and the lower clamping arm 105 are in the initial open state, the shift blocks 108 on both sides are infinitely close but not in contact.

[0049] When in use, during the measurement of the workpiece to be tested, if the staff finds that an emergency such as a fire occurs at the junction of the workpiece to be tested and the lower clamping arm 105, the stud 408 is unscrewed. At the moment the stud 408 is unscrewed, the telescopic tube 403 and the twisted torsion spring 109 are quickly reset, and the movable plug 406 quickly slides to the bottom of the adjustment tube 405, so that the upper clamping arm 107 quickly moves away from the lower clamping arm 105. Under the action of the elasticity of the torsion spring 109 itself, the upper clamping arm 107 will continue to rotate to the side away from the lower clamping arm 105 when it is reset to the initial position, thereby causing the shift block 108 to move to the top of the sleeve 1 The parts of the wedge block 204 are brought together, so that the resistance block 206 on the shift block 108 presses the resistance block 206 at the end of the transmission rod 203, so that the end of the transmission rod 203 away from the wedge block 204 moves downward, and then the other end of the transmission rod 203 drives the wedge block 204 to move upward, and the bottom end of the wedge block 204 is disengaged from the slot 509, so that the compressed return spring 507 is quickly released, and the test contact 505 is quickly disengaged from the docking seat 102, and then the clamping of the workpiece to be tested is quickly released and the measurement of the workpiece to be tested is quickly interrupted in an emergency, so that the test clamp structure can be easily removed.

[0050] Therefore, the present invention realizes rapid termination of measurement and rapid release of clamping of the workpiece to be measured in an emergency such as a fire, through the coordinated linkage between the limit unit 2 and the drive unit 4.

[0051] In order to speed up the loosening of the clamping structure and the cutting off of the detection when a high-temperature scenario such as a fire or a short circuit occurs, the locking mechanism can also be an electromagnetic latch, which is arranged on the side of the adjusting cylinder 405. The pin rod of the electromagnetic latch extends into the pin hole on the side of the adjusting cylinder 405 and contacts the side of the push-pull rod 407 to position the push-pull rod 407. By setting a temperature sensor on the clamping side of the friction block 304, when the temperature of the clamping point is higher than the normal temperature threshold set by the temperature sensor, the pin rod of the locking mechanism is quickly retracted from the pin hole through the controller in the measuring device body 5 to release the lock on the push-pull rod 407. In the retracted state, the pin rod is located outside the adjusting cylinder 405 to prevent the discharge of the gas inside the adjusting cylinder 405 from being affected.

[0052] In summary, the present invention realizes remote clamping operation through the auxiliary unit 3 and the drive unit 4, thereby avoiding the manual clamping and detection of the test piece by the staff in the prior art, thereby preventing electric shock accidents; in addition, when clamping the small-sized test piece, the auxiliary unit 3 and the drive unit 4 are used to effectively improve the clamping stability, thereby preventing the test piece from loosening and falling off when being clamped in the prior art; in addition, in the event of emergency situations such as fire and short circuit, the limit unit 2 and the drive unit 4 are used to achieve rapid separation between the test contact 505 and the clamping structure, and the clamping structure is quickly released from the clamping of the test piece, thereby preventing the staff from being unable to directly remove the clamping structure to release the clamping and timely cut off the detection in the event of emergency situations such as fire and short circuit in the prior art, thereby avoiding the expansion of the accident.

[0053] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An electric power test clamp structure, used for an electric variable measuring device, comprising a sleeve (1), characterized in that: A retaining ring (101) is provided inside the sleeve (1), a docking seat (102) is provided on the inner end surface of the sleeve (1), a support (104) is provided at the end of the sleeve (1), a lower clamping arm (105) is provided at the bottom of the support (104), a pin shaft (106) is rotatably connected to the top of the side surface of the support (104), an upper clamping arm (107) is fixedly sleeved on the pin shaft (106), a torsion spring (109) is sleeved on the end of the pin shaft (106), and two ends of the torsion spring (109) are respectively fixedly connected to the pin shaft (106) and the side surface of the support (104); A limiting unit (2) is provided on the top of the sleeve (1), an auxiliary unit (3) is provided on the upper clamping arm (107), and a driving unit (4) for driving the pin shaft (106) to rotate is provided on one side of the support (104); The limiting unit (2) comprises a guide hole (201) and a transmission rod (203); the guide hole (201) is formed at the end of the sleeve (1); a wedge block (204) passes through the guide hole (201); the transmission rod (203) is movably arranged on the top of the sleeve (1) via a hinge seat (202); and an elastic member (205) is arranged between the bottom surface of the transmission rod (203) and the sleeve (1); The auxiliary unit (3) comprises a mounting groove (301), an elastic block (303) is arranged inside the mounting groove (301) via a fixing plate (302), and a friction block (304) is arranged at the bottom of the elastic block (303); The auxiliary unit (3) achieves fastening and clamping by cooperating with the driving unit (4), and the cooperation among the limit unit (2), the auxiliary unit (3) and the driving unit (4) enables rapid detachment from the test piece in an emergency; A docking groove (103) is provided at the end of the docking seat (102), arc grooves are provided on the opposing surfaces of the upper clamping arm (107) and the lower clamping arm (105), tooth seats (110) are provided on both sides of the arc groove on the lower clamping arm (105), a shift block (108) is provided at one end of the upper clamping arm (107) close to the sleeve (1), and the docking groove (103) is electrically connected to the tooth seat (110); The top end of the wedge block (204) is fixedly connected to the end of the transmission rod (203), and a resisting block (206) is provided at the top of one end of the transmission rod (203) close to the shifting block (108) and at the bottom of the shifting block (108); The mounting groove (301) is provided in the middle of the upper clamping arm (107); the elastic block (303) is a hollow structure; and an air guide tube (305) is provided on the top of the elastic block (303); The driving unit (4) comprises a connecting rod (401), a telescopic tube (403) is provided at the bottom of the side of the connecting rod (401), an end of the telescopic tube (403) is arranged on the side of the support (104) through a mounting seat (402), a connecting tube (404) which is in communication with the inside of the telescopic tube (403) is provided at the end of the mounting seat (402), an adjusting tube (405) is provided at the end of the connecting tube (404), a movable plug (406) is slidably fitted inside the adjusting tube (405), a push-pull rod (407) is provided at the top of the movable plug (406), and a locking mechanism for locking the push-pull rod (407) is provided at the top of the side of the adjusting tube (405).

2. The power test clip structure according to claim 1, characterized in that: The connecting rod (401) is arranged on the circumferential surface of the pin shaft (106), the push-pull rod (407) passes through the top end of the adjustment tube (405), the locking mechanism is a stud (408) threadedly connected to the adjustment tube (405), and the top of the adjustment tube (405) is fixedly connected to the end of the air guide tube (305).

3. An electric variable measuring device, comprising the electric test clip structure according to any one of claims 1 to 2, characterized in that: The electric variable measuring device further comprises a measuring device body (5), wherein a plug port (501) is provided at the top of the measuring device body (5), a test cable (502) is plugged into the plug port (501), an insulating handle (503) is provided at the end of the test cable (502), a test rod (504) is provided at the end of the insulating handle (503), and the test rod (504) is electrically connected to the test cable (502).

4. The electric variable measuring device according to claim 3, characterized in that: A test contact (505) is provided at the end of the test rod (504), a sleeve (506) is movably sleeved on the test rod (504), and a return spring (507) is sleeved at a position between the sleeve (506) and the end of the insulating handle (503) on the test rod (504).

5. The electric variable measuring device according to claim 4, characterized in that: A limiting plate (508) is fixedly sleeved on one side of the insulating handle (503) close to the test contact (505), and a slot (509) cooperating with the wedge block (204) is provided on the insulating handle (503) between the limiting plate (508) and the test rod (504).

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