A general-purpose adjustable circuit breaker testing auxiliary device

Abstract

This invention discloses a universal adjustable circuit breaker testing auxiliary device, including a carrier platform and at least one set of single-pole test crimping modules. Each single-pole test crimping module includes a mounting base, an adjusting rod, an electrical contact crimping assembly, and a limiting mechanism. The adjusting rod slides through the mounting base. The electrical contact crimping assembly is linked to the adjusting rod and has an elastically movable conductive voltage contact rod. By pressing down the adjusting rod, the conductive voltage contact rod can be driven to elastically press against the circuit breaker's conductive plate to establish a test electrical contact. The limiting mechanism includes multiple limiting teeth on the adjusting rod and a check valve in the mounting base. These two components cooperate to form a unidirectional limiting fit that allows the adjusting rod to move downwards in one direction and restricts its upward reverse movement. This circuit breaker testing auxiliary device achieves stepless adjustment and instant locking of the crimping height, significantly simplifying the operation process. It has advantages such as convenient operation, efficient model changeover, strong compatibility, reliable testing, and low equipment cost.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical equipment technology, and more specifically to a universal adjustable circuit breaker testing auxiliary device. Background Technology

[0002] Molded case circuit breakers (MCCBs), as key protective components in low-voltage power distribution systems, are widely used for overload and short-circuit protection of power lines and equipment in industrial, commercial, and high-rise building sectors. During the circuit breaker manufacturing process, energization testing is a crucial step in verifying conductivity, operational characteristics, and reliability. Currently, traditional energization testing of circuit breakers mainly relies on manual operation. Testers use spring clips or alligator clips to clamp the circuit breaker onto the conductive plates of phases A, B, and C one by one to establish the test circuit. However, this manual clamping method has significant drawbacks: the conductive plates of the circuit breaker are in narrow spaces, requiring operators to frequently bend over and align the clamping points, resulting in high labor intensity and low efficiency; the clips are prone to slippage or poor contact, leading to inaccurate test results, and even localized heating due to excessive contact resistance, posing safety hazards; the conductive plate shapes, sizes, and spacing vary among different circuit breaker models, making it difficult to use traditional clips interchangeably, further reducing testing efficiency.

[0003] To improve the above situation, an improved clamping mechanism for test benches has been proposed, which uses a cylinder-driven clamping rod. The cylinder moves the rod up and down to automatically clamp and release the circuit breaker's conductive plate. This mechanism reduces manual operation and improves clamping stability to some extent. However, this cylinder-driven clamping mechanism still has the following shortcomings: First, the rod stroke is fixed or can only be adjusted simply by the cylinder stroke, making it difficult to accurately adapt to circuit breakers of different heights. Especially when the production line frequently switches product models, manual replacement of the rod or adjustment of the cylinder position is required, which is cumbersome. Second, cylinder drive relies on an external air source and control system, resulting in high equipment costs. Furthermore, the response delay and pressure fluctuations of pneumatic components may affect the stability of the clamping force, leading to inconsistent contact resistance. In addition, this mechanism typically only achieves a single clamping action and cannot provide multi-level, quick-reset height adjustment. When testing multiple product models in batches, switching efficiency remains limited. Therefore, there is an urgent need for a circuit breaker testing auxiliary device with a simpler structure, more flexible adjustment, and stronger compatibility. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the circuit breaker in the prior art uses a spring clip or cylinder-driven mechanism to establish a test circuit. The manual operation of the spring clip is labor-intensive, inefficient, has poor contact stability and lacks versatility, while the cylinder-driven mechanism has problems such as poor adjustment flexibility, high equipment cost and unstable clamping force.

[0005] To address the above problems, this invention provides a universal adjustable circuit breaker testing auxiliary device, comprising: The carrier platform includes a first installation area and a second installation area that are spaced apart. The second installation area is used to place the circuit breaker to be tested. The first installation area is provided with at least one set of adjustable single-pole test crimping modules. Both the single-pole test crimping modules and the circuit breaker can be moved and adjusted in their respective installation areas along the length of the carrier platform to make them aligned and matched. The single-pole test crimping module includes a mounting base, an adjusting rod, an electrical contact crimping assembly, and a limiting mechanism. The mounting base is fixed in the first mounting area. The adjusting rod is made of insulating material and slides through the mounting base in a direction perpendicular to the carrier platform. The electrical contact crimping assembly is movably disposed on the outside of the mounting base and electrically connected to the test power supply. It includes a transmission bracket linked to the adjusting rod and a voltage-conducting rod elastically connected to the transmission bracket. The voltage-conducting rod elastically presses against the conductive plate of the corresponding pole of the circuit breaker as the adjusting rod moves downward. The limiting mechanism includes multiple limiting teeth spaced apart on the adjusting rod along the moving direction of the adjusting rod, and a check member elastically swingable within the mounting base. The check member extends into the movement path of the multiple limiting teeth and cooperates with the multiple limiting teeth to form a unidirectional limiting fit that allows the adjusting rod to move downward in one direction and restricts its upward reverse movement, thereby locking the voltage-conducting rod at the adjusted height position.

[0006] In the aforementioned general adjustable circuit breaker testing auxiliary device, the mounting base is provided with a first guide groove and a second guide groove extending along the moving direction of the adjusting rod. The adjusting rod is slidably disposed in the first guide groove and is provided with a force-bearing block extending into the second guide groove. An adjusting spring connected to the force-bearing block is provided in the second guide groove. The adjusting spring provides an elastic force that causes the adjusting rod to move upward. Under the action of the adjusting spring, the adjusting rod drives the limiting teeth on it to maintain a locking contact with the check piece to maintain a one-way limiting fit.

[0007] In the aforementioned general adjustable circuit breaker testing auxiliary device, the check valve is a check valve claw with a curved structure, which includes a hinged end hinged in the mounting base and a claw end that forms a one-way limiting engagement with the limiting teeth. One side of the claw end is formed with a guide arc surface. When the adjusting rod is pressed and moves downward, it slides along the guide arc surface through the limiting teeth to push open the check valve and create a clearance that allows the adjusting rod to move downward in one direction.

[0008] In the aforementioned general adjustable circuit breaker testing auxiliary device, the limiting tooth has an inclined tooth surface and a stop step surface set at an angle; the anti-reverse element presses against the stop step surface of the limiting tooth through the cooperation of the claw end to limit the upward movement tendency of the adjusting rod; when the adjusting rod moves downward, the sliding cooperation between the guide arc surface and the inclined tooth surface causes the claw end to slide along the inclined tooth surface to make way for multiple limiting teeth, so as to allow the adjusting rod to move downward unidirectionally.

[0009] In the aforementioned general adjustable circuit breaker testing auxiliary device, the single-pole test crimping module further includes a reset structure connected to the check element. The reset structure includes a reset push rod movably inserted into the mounting base and a reset spring disposed between the check element and the inner wall of the mounting base. Under the elastic force of the reset spring, the check element always maintains a contact tendency with the check element. Only when the reset push rod and the adjusting rod are pressed down simultaneously, the reset push rod drives the check element to rotate around the hinge end and disengage from multiple limiting teeth to release the one-way limiting engagement.

[0010] In the aforementioned general adjustable circuit breaker testing auxiliary device, the reset push rod moves through the mounting base in a direction parallel to the adjusting rod, and its pushing end extends to abut against the pressure-bearing part on the upper side of the check member. The top ends of the reset push rod and the adjusting rod extend out of the top of the mounting base in the same direction. The reset push rod has a first position in which the check member abuts against the limiting tooth to form a one-way limiting engagement, and a second position in which the check member swings to disengage from the limiting tooth when pressed down.

[0011] In the aforementioned general adjustable circuit breaker testing auxiliary device, the check valve has a connecting protrusion at its hinge end, the inner wall of the mounting base has a connecting rod, one end of the reset spring is hooked to the connecting protrusion, and the other end is hooked to the connecting rod; the reset spring is used to pull the check valve to reset rotation after the external force is removed from the reset push rod, and drive the reset push rod back to the first position.

[0012] In the aforementioned universal adjustable circuit breaker testing auxiliary device, a vertical opening slot is provided on the side wall of the mounting base near the electrical contact crimping assembly. The extending direction of the vertical opening slot is consistent with the moving direction of the adjusting rod. The transmission bracket includes a fixedly connected U-shaped frame and a connecting arm. The connecting arm extends through the vertical opening slot into the interior of the mounting base and is fixedly connected to the adjusting rod, so that the transmission bracket moves synchronously with the adjusting rod. The conductive voltage contact rod is hinged to the U-shaped slot of the U-shaped frame through a rotating shaft structure.

[0013] In the aforementioned universal adjustable circuit breaker testing auxiliary device, a compression spring is provided between the voltage-conducting rod and the transmission bracket. A mounting boss is provided at the bottom of one end of the voltage-conducting rod. One end of the compression spring is connected to the mounting boss, and the other end is connected to a mounting hole in the transmission bracket. The compression spring applies elastic pressure to the voltage-conducting rod against the circuit breaker's conductive plate. A rotation limiter is provided between the U-shaped frame and the voltage-conducting rod to restrict the rotation angle range of the voltage-conducting rod around the rotating shaft structure. The rotation limiting structure includes a set of arc-shaped end faces and a set of limiting stops connected to both sides of the opening of the U-shaped frame, and a set of sliding inclined surfaces and a set of locking protrusions connected to both sides of the conductive voltage connecting rod. Under the action of the pressing spring, the conductive voltage connecting rod drives its locking protrusions to abut against the limiting stops of the U-shaped frame to limit the downward rotation of the conductive voltage connecting rod. When the conductive voltage connecting rod is pressed, it drives its sliding inclined surfaces to slide along the arc-shaped end faces of the U-shaped frame, causing the conductive voltage connecting rod to rotate relative to the U-shaped frame.

[0014] In the aforementioned general adjustable circuit breaker testing auxiliary device, the first mounting area is provided with a guide rail extending along the length direction of the carrier platform, and the bottom of the mounting base is provided with a guide rail slider that slides with the guide rail. The single-pole test crimping module moves and adjusts its position along the length direction of the carrier platform through the sliding connection between the guide rail slider and the guide rail. The second mounting area is provided with a guide hole extending along the length direction of the carrier platform. At least one set of guide connectors that can move along the guide hole are provided in the guide hole. A set of positioning rods is connected to the at least one set of guide connectors. Each set of positioning rods moves and adjusts its position along the guide hole through the guide connectors to cooperate in clamping both sides of the circuit breaker.

[0015] The technical solution of the present invention has the following advantages compared with the prior art: 1. The circuit breaker testing auxiliary device provided by this invention mainly consists of a mounting base, an adjusting rod, an electrical contact crimping assembly, and a limiting mechanism. The advantages of this design are: First, the adjusting rod can be adjusted vertically to accommodate circuit breakers of different heights. The electrical contact crimping assembly is linked to the adjusting rod via a transmission bracket. With the help of a flexible voltage contact rod connected to the transmission bracket, the operator only needs to apply a single downward pressure to the adjusting rod to drive the voltage contact rod to elastically press against the conductive plate of the corresponding phase of the circuit breaker, thus establishing the test electrical contact in one step. Compared to the traditional manual phase-by-phase clamping method, this simplifies the operation, improves testing efficiency, and ensures the stability of the electrical performance of the test circuit. Second, The limiting mechanism, through multiple limiting teeth on the adjusting rod and the elastically swinging check piece, forms a unidirectional limiting engagement that allows the adjusting rod to move downwards in one direction only and restricts its upward movement in the opposite direction. Based on this unidirectional limiting engagement, after the operator presses down the adjusting rod to any height where the voltage contact rod reliably contacts the conductive plate and then releases the rod, the checking piece automatically locks the adjusting rod at that working height. This achieves stepless adjustment of the voltage contact rod's pressing height and instant mechanical locking, greatly simplifying the operation process. It does not require a pneumatic source, power supply, or matching control components, and has a simple and compact structure. The circuit breaker testing auxiliary device designed with this structure has the advantages of convenient operation, efficient model changeover, strong compatibility, reliable testing, and low equipment cost, making it suitable for online testing scenarios of large-volume circuit breakers on production lines.

[0016] 2. In the circuit breaker testing auxiliary device provided by the present invention, the limiting mechanism uses a check piece with an elastic swing setting to cooperate with a limiting tooth with a one-way tooth structure. This allows the inclined tooth surface of the limiting tooth to push the check piece to elastically avoid the downward movement during the pressing of the adjusting rod, ensuring smooth and unobstructed downward movement. The locking position can be flexibly selected according to the actual pressing height of the circuit breaker. After pressing into place, the upward preload provided by the adjusting spring drives the limiting tooth and the check piece to maintain a tight and rigid contact, realizing a one-way self-locking function. This effectively eliminates assembly and movement gaps, significantly improves the locking reliability of the one-way limiting cooperation, and can effectively resist operational vibrations and external disturbances, avoiding tooth skipping, tripping, and accidental rebound and loosening of the pressing mechanism, ensuring a continuous and stable electrical contact state during circuit breaker testing.

[0017] 3. In the circuit breaker testing auxiliary device provided by this invention, the reset structure and the one-way limit mechanism cooperate with each other using a dual-rod synchronous pressing unlocking operation mode to achieve controllable release of the locked state and automatic return of the mechanism. After the test is completed, the operator presses down the adjusting rod and the reset push rod simultaneously with one hand: the adjusting rod drives the limit teeth on it to move away from the check piece and down to the lowest position, while the reset push rod pushes the check piece to rotate around the hinge end, so that the claw end completely disengages from the movement path of the limit teeth, thereby immediately releasing the one-way limit constraint between the adjusting rod and the check piece. Then, after releasing the adjusting rod and the reset push rod, the unlocked adjusting rod automatically rises and resets by the adjusting spring, and the reset push rod and the check piece automatically return to their standby position by the reset spring. This reset structure requires pressing the adjusting rod and the reset push rod simultaneously to release the one-way limit engagement, structurally eliminating the safety hazard of accidental unlocking leading to loosening of the crimp, and significantly improving the safety and reliability of the testing operation.

[0018] 4. In the circuit breaker testing auxiliary device provided by this invention, the two ends of the compression spring are respectively hooked to the voltage-conducting rod and the transmission bracket, and a rotation limit mechanism is set to limit the rotation angle range of the voltage-conducting rod. With this structural design, after the voltage-conducting rod contacts the circuit breaker conductive plate, the adjusting rod can continue to press down for a certain stroke, so that the compression spring is further compressed and accumulates elastic potential energy during this process, providing a continuous and stable contact preload for the voltage-conducting rod. This contact overtravel design can effectively compensate for the machining tolerance of parts, assembly errors, and wear of the contact surface of the voltage-conducting rod after long-term use, ensuring that sufficient and stable contact pressure can be maintained between the voltage-conducting rod and the conductive plate under any working condition, reducing contact resistance, improving test stability, and further improving the ease of operation and reliability of the device. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0020] Figure 1 A schematic diagram of the planar structure of the circuit breaker testing auxiliary device provided by the present invention; Figure 2 This is a partially enlarged structural schematic diagram of the circuit breaker testing auxiliary device of the present invention; Figure 3 This is a three-dimensional structural diagram of the single-pole test crimping module of the present invention; Figure 4 This is a schematic cross-sectional view of the single-pole test crimping module of the present invention; Figure 5 This is a cross-sectional structural diagram of the electrical contact crimping assembly of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Carrier platform; 11. First mounting area; 12. Second mounting area; 13. Guide hole; 14. Positioning rod; 15. Guide rail; 16. First guide groove; 17. Second guide groove; 2. Mounting base; 21. Vertical opening groove; 22. Connecting rod; 23. Guide rail slider; 3. Adjusting rod; 31. Force-bearing block; 4. Electrical contact crimping assembly; 41. Electrically conductive crimping rod; 42. Transmission bracket; 421. U-shaped frame; 422. Connecting arm; 43. Press spring; 44. Hanging boss; 45. Arc end face; 46. Limiting stop; 47. Sliding inclined surface; 48. Locking boss; 5. Limiting tooth; 51. Inclined tooth surface; 52. Stop step surface; 6. Check valve; 61. Claw end; 62. Guide arc surface; 63. Connecting protrusion; 7. Reset push rod; 8. Reset spring; 9. Adjusting spring; 100. Single-pole test pressing module; 200. Circuit breaker. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Example This embodiment discloses a universal adjustable circuit breaker testing auxiliary device, applicable to the energizing performance testing of 1P / 2P / 3P / 4P series molded case circuit breakers, specifically combined with... Figures 1-5As shown, this circuit breaker testing auxiliary device includes a carrier platform 1 and at least one set of adjustable single-pole test crimping modules 100. The carrier platform 1 includes a first mounting area 11 and a second mounting area 12 spaced apart. The first mounting area 11 is used to install the single-pole test crimping modules 100, and the second mounting area 12 is used to place the circuit breaker 200 to be tested. Both the single-pole test crimping module 100 and the circuit breaker 200 can be independently moved and adjusted in their respective mounting areas along the length of the carrier platform 1 to ensure precise alignment and mating between the voltage connecting rod 41 and the conductive plate of the corresponding pole of the circuit breaker 200. This overall design can quickly match circuit breakers 200 with different pole numbers, different conductive plate spacings, and different external dimensions. It achieves compatibility and adaptation of all product specifications without changing any tooling components, significantly improving product changeover efficiency and device versatility, and reducing equipment investment costs.

[0026] The single-pole test crimping module 100 mainly consists of a mounting base 2, an adjusting rod 3, an electrical contact crimping assembly 4, a limiting mechanism, and a reset structure. The mounting base 2 is a split-shell structure, consisting of a left shell and a right shell joined together by bolts, facilitating the assembly and maintenance of internal components. Its bottom is slidably connected to a linear guide rail 15 via a guide rail slider 23. The adjusting rod 3 is made of insulating material and slides through the mounting base 2 in a direction perpendicular to the carrier platform 1, with its top extending beyond the top of the mounting base 2 to form a pressing operation end. The electrical contact crimping assembly 4 is movably disposed on the outside of the mounting base 2 and is electrically connected to an external test power supply via a wire. It is linked with the adjusting rod 3, and as the adjusting rod 3 moves downward, it elastically presses against the conductive plate of the corresponding pole of the circuit breaker 200. The limiting mechanism includes a plurality of limiting teeth 5 spaced apart on the adjusting rod 3 along the moving direction of the adjusting rod 3, and a check member 6 elastically swingable in the mounting base. The check member 6 extends to the movement path of the plurality of limiting teeth 5 and cooperates with the plurality of limiting teeth 5 to form a one-way limiting engagement that allows the adjusting rod 3 to move downward in one direction and restricts its upward reverse movement, so as to lock the conductive voltage contact rod 41 at the adjusted height position.

[0027] The single-pole test crimping module 100 with the above-described structure has the following advantages: First, the adjustment rod 3 can be adjusted vertically to accommodate circuit breakers 200 of different heights. The electrical contact crimping assembly 4 is linked to the adjustment rod 3 via the transmission bracket 42. With the help of the conductive voltage contact rod 41 elastically connected to the transmission bracket 42, the operator only needs to apply a single downward pressure to the adjustment rod to drive the conductive voltage contact rod 41 to elastically press against the conductive plate of the corresponding phase of the circuit breaker, thus establishing the test electrical contact in one step. It can also adaptively compensate for the height tolerance and installation position deviation of the circuit breaker conductive plate. Compared with the traditional manual phase-by-phase clamping operation, it simplifies the operation steps, improves testing efficiency, and ensures the stability of the electrical performance of the test circuit. Second, the limiting mechanism... Multiple limiting teeth 5 on the adjusting rod 3 cooperate with the elastically swinging check piece 6 to form a unidirectional limiting fit that only allows the adjusting rod 3 to move downwards and restricts its upward movement. Based on this unidirectional limiting fit, after the operator releases the adjusting rod 3 at any height where the voltage contact rod 41 reliably contacts the conductive plate, the adjusting rod 3 is automatically locked at that working height by the check piece 6. This achieves stepless adjustment of the pressing height of the voltage contact rod 41 and instant mechanical locking, greatly simplifying the operation process. It does not require air source, power source, or matching control components, and has a simple and compact structure. The circuit breaker testing auxiliary device designed with this structure has the advantages of convenient operation, efficient model changeover, strong compatibility, reliable testing, and low equipment cost. It is suitable for online testing scenarios of large-volume circuit breakers on production lines.

[0028] In a further preferred configuration, the mounting base 2 is internally provided with two guide grooves extending along the moving direction of the adjusting rod 3, namely a first guide groove 16 and a second guide groove 17. The adjusting rod 3 is slidably disposed in the first guide groove 16, and a horizontally extending force-bearing block 31 is integrally formed on its side wall, extending into the second guide groove 17. An adjusting spring 9 is disposed in the second guide groove 17. The lower end of the adjusting spring 9 is fixedly connected to the bottom of the second guide groove 17, and its upper end is connected to the lower surface of the force-bearing block 31. The adjusting spring 9 provides an elastic force that continuously propels the adjusting rod 3 upwards, ensuring that the limiting teeth 5 on the adjusting rod 3 and the check piece 6 are normally tightly engaged, eliminating clearance and preventing issues such as misalignment, skipping teeth, and accidental disengagement. Simultaneously, after unlocking, the adjusting spring 9 can drive the adjusting rod 3 to automatically reset, eliminating the need for manual lifting and resetting. This double-guide groove design provides precise linear guidance for the adjusting rod, effectively avoiding skewing, shaking, and jamming during sliding, ensuring smooth and reliable movement of the mechanism.

[0029] The following is combined Figures 3-5 The specific setup of the limit mechanism is explained in detail: Multiple limiting teeth 5 are integrally formed at equal intervals along the moving direction of the adjusting rod 3 on the side wall of the adjusting rod 3 facing the check member 6. Each limiting tooth 5 has an inclined tooth surface 51 and a stop step surface 52 arranged at an angle. The check member 6 is a check pawl with a curved structure, which includes a hinge end hinged to the inner wall of the mounting base 2 and a pawl end 61 that forms a one-way limiting engagement with the limiting teeth 5. A guide arc surface 62 is formed on one side of the pawl end 61, and the guide arc surface 62 slides in engagement with the inclined tooth surface 51 of the limiting teeth 5. According to the movement path of the check member 6 extending to the multiple limiting teeth 5, it cooperates with the multiple limiting teeth 5 to form a one-way limiting engagement that allows the adjusting rod 3 to move downward in one direction and restricts its upward reverse movement. This limiting mechanism uses a check piece 6 with an elastic swing setting to cooperate with a limiting tooth 5 with a one-way toothed structure. When the adjusting rod 3 is pressed down, the inclined tooth surface 51 of the limiting tooth 5 slides along the guide arc surface 62 of the check piece 6, pushing the check piece 6 open and causing it to swing outward around the hinge end to make room, thus achieving a smooth and continuous downward movement of the adjusting rod 3. When the adjusting rod 3 is pressed down to the target position and the external force is released, the adjusting spring 9 pushes the adjusting rod 3 upward slightly back, so that the stop step surface of the limiting tooth 5 and the claw end of the check piece 6 form a rigid abutment, reliably limiting the upward rebound of the adjusting rod, realizing a mechanical one-way self-locking function. It can stop and position at any level according to different crimping heights of the circuit breaker, greatly improving the locking reliability of the one-way limiting cooperation, effectively resisting operation vibration and external disturbances, avoiding tooth skipping, tripping, and unexpected rebound and loosening of the crimping mechanism, and ensuring the continuous stability of the electrical contact state during the circuit breaker testing process.

[0030] In this embodiment, as Figure 4As shown, the single-pole test crimping module 100 includes a reset structure connected to the check piece 6. The reset structure includes a reset push rod 7 movably inserted into the mounting base 2, and a reset spring 8 disposed between the check piece 6 and the inner wall of the mounting base 2. The check piece 6 has a connecting protrusion 63 integrally formed at its hinge end. A connecting rod 22 is fixedly installed on the inner wall of the mounting base 2. The reset spring 8 is a tension spring, with one end hooked to the connecting protrusion 63 and the other end hooked to the connecting rod 22. Under the elastic force of the reset spring 8, the check piece 6 always maintains a contact tendency with the check piece 6. With this structure, the reset structure and the one-way limiting mechanism cooperate with each other to adopt a double-rod synchronous pressing and unlocking operation mode, realizing the controllable release of the locked state and the automatic return of the mechanism. After the circuit breaker 200 is tested, the operator presses down with one hand simultaneously. The adjustment rod 3 and the reset push rod 7 are pressed together: the adjustment rod 3 moves the limiting tooth 5 away from the check piece 6 to the lowest position, and at the same time the reset push rod 7 pushes the check piece 6 to rotate around the hinge end, so that the claw end 61 completely disengages from the movement path of the limiting tooth 5, thereby immediately releasing the one-way limiting constraint between the adjustment rod 3 and the check piece 6. After releasing the adjustment rod 3 and the reset push rod 7, the unlocked adjustment rod 3 is automatically raised and reset by the adjustment spring 9, and the reset push rod 7 and the check piece 6 are automatically returned to their standby position by the reset spring 8. This reset structure requires pressing the adjustment rod 3 and the reset push rod 7 simultaneously to release the one-way limiting fit, which structurally eliminates the safety hazard of accidental unlocking leading to loosening of the crimping, thereby avoiding the safety hazard of accidental loosening of the crimping mechanism and circuit disconnection due to accidental contact with the reset push rod during the test, significantly improving the safety and reliability of the test operation.

[0031] In a further preferred configuration, the reset push rod 7 slides through the mounting base 2 in a direction parallel to the adjusting rod 3. Its top end extends out of the top of the mounting base 2 in the same direction and flush with the top end of the adjusting rod 3, and its bottom end is the pushing end, extending to abut against the pressure portion on the upper side of the check member 6. This reset push rod 7 has a first limiting position and a second unlocking position. Under normal conditions, the reset push rod 7 is in the first limiting position, which can accurately limit the upward swing amplitude of the check member 6, ensuring that its engagement depth with the limiting teeth 5 is consistent, effectively avoiding problems such as false locking, skipping teeth, and engagement failure, and significantly improving the self-locking reliability of the limiting mechanism. When the reset push rod 7 is pressed down to the second unlocking position, its pushing end drives the check member 6 to rotate around the hinge end, so that the claw end 61 is completely disengaged from all the limiting teeth 5 on the adjusting rod 3. This position ensures that the check claw is driven to a state where it is completely disengaged from all the limiting teeth 5 on the adjusting rod 3, completely releasing the unidirectional limiting constraint, and clearing the way for the adjusting rod 3 to automatically move upward and reset under the action of the adjusting spring 9. After the adjusting rod 3 and the reset push rod 7 are released, the reset spring 8 pulls the check piece 6 to rotate and reset, and the check piece 6 pushes the reset push rod 7 upward back to the first limit position, so that the check piece automatically forms a locking engagement with the limit tooth at the lowest point of the adjusting rod, preparing for the next adjustment.

[0032] The following is combined Figures 2-5 The specific configuration of the electrical contact crimping assembly 4 is explained in detail below: A vertical opening slot 21 is provided on the side wall of the mounting base 2 near the electrical contact crimping assembly 4. The extending direction of the vertical opening slot 21 is consistent with the moving direction of the adjusting rod 3. The electrical contact crimping assembly 4 includes a transmission bracket 42, a conductive contact rod 41, and a crimping spring 43. The transmission bracket 42 is a split structure, consisting of a fixedly connected U-shaped frame 421 and a connecting arm 422. The U-shaped frame 421 and the connecting arm 422 are fixedly connected by screws. The connecting arm 422 extends horizontally through the vertical opening slot 21 into the interior of the mounting base 2 and is fixedly connected to or integrally formed with the side wall of the adjusting rod 3, so that the transmission bracket 42 moves synchronously with the adjusting rod 3. The adjusting rod and the connecting arm are both insulating parts made of plastic material, and the reset push rod is also made of insulating material. The voltage-conducting rod 41 is made of copper alloy. One end is hinged to the U-shaped groove of the U-shaped frame 421 via a rotating shaft structure, and the other end extends into the second mounting area 12 for pressing the circuit breaker conductive plate. Specifically, the rotating shaft structure uses a screw-shaft and nut combination, with the screw shaft passing through the two side walls of the U-shaped frame and the upper part of the voltage-conducting rod, and its screw end being securely connected to the nut. Alternatively, the rotating shaft structure can also use a pin-shaft rotation method. Before testing, the voltage-conducting rod 41 can be directly connected to the test power supply wire by screw locking or welding. The pressing spring 43 is located between the voltage-conducting rod 41 and the transmission bracket 42. One end of the voltage-conducting rod 41 has a hanging boss 44 at its bottom. One end of the pressing spring 43 is connected to the hanging boss 44, and the other end is connected to the hanging hole in the transmission bracket 42. The pressing spring 43 applies elastic pressure to the voltage-conducting rod 41 against the circuit breaker 200 conductive plate. This electrical contact crimping assembly 4 adopts a split transmission bracket 42 and a conductive voltage contact rod 41 for hinged installation, so that the electrical contact crimping assembly is integrated as an independent module on the outside of the mounting base. The assembly process is clear and convenient, and installation and maintenance can be completed without disassembling the internal core mechanism.

[0033] In a preferred embodiment, the bottom of one end of the voltage-conducting rod 41 is provided with a hanging boss 44. One end of the compression spring 43 is connected to the hanging boss 44, and the other end is connected to the hanging hole opened in the transmission bracket 42. The compression spring 43 applies elastic pressure to the voltage-conducting rod 41 against the conductive plate of the circuit breaker. The advantage of this design is that after the voltage-conducting rod 41 contacts the conductive plate of the circuit breaker 200, the adjusting rod 3 can continue to press down a certain stroke, so that the compression spring 43 is further compressed and accumulates elastic potential energy in this process, providing a continuous and stable contact preload force for the voltage-conducting rod 41. This contact overtravel design can effectively compensate for the machining tolerance of parts, assembly errors, and wear of the contact surface after long-term use of the voltage-conducting rod, ensuring that sufficient and stable contact pressure can be maintained between the voltage-conducting rod and the conductive plate under any working condition, reducing contact resistance, improving test stability, and further improving the ease of operation and reliability of the device.

[0034] To limit the rotation angle range of the conductive voltage connector 41 around the rotating shaft structure, such as Figure 5 As shown, a rotation limiting structure is provided between the U-shaped frame 421 and the conductive voltage connecting rod 41. The rotation limiting structure includes a set of arc end faces 45 and a set of limiting stops 46 connected to both sides of the opening of the U-shaped frame 421, and a set of sliding inclined surfaces 47 and a set of locking protrusions 48 connected to both sides of the conductive voltage connecting rod 41. With this structure, in the non-pressurized state, the conductive voltage connecting rod 41, under the action of the pressing spring 43, drives its locking protrusions 48 to engage with the U-shaped frame 421. The limiting stop 46 of the 1 abuts against each other to limit the downward rotation tendency of the voltage conductor 41, so that the voltage conductor 41 remains in a horizontal standby posture; during the pressing process, when the voltage conductor 41 is pressed, it drives its sliding inclined surface 47 to slide along the arc end face 45 of the U-shaped frame 421, so that the voltage conductor 41 rotates relative to the U-shaped frame 421, which can adaptively compensate for the height tolerance and installation position deviation of the circuit breaker conductive plate, and realize the pressing contact between the voltage conductor and the conductive plate.

[0035] To further optimize and adjust the positioning accuracy and ease of operation between the single-pole test crimping module 100 and the circuit breaker 200, such as Figures 1-2As shown, a linear guide rail 15 extending along the length of the carrier platform 1 is fixedly installed on the upper surface of the first installation area 11. A guide rail slider 23, which slides along the linear guide rail 15, is provided at the bottom of the unipolar test pressing module 100. Through the sliding connection between the guide rail slider 23 and the linear guide rail 15, the unipolar test pressing module 100 can freely move and adjust its position along the length of the carrier platform 1. This guide rail 15 sliding adjustment structure operates smoothly without jamming, has high guiding accuracy, and ensures that each unipolar module moves along the same reference line, significantly improving the alignment accuracy of the conductive voltage connecting rod 41 and the conductive plate. It also has strong load-bearing capacity and is not easily deformed after long-term use. At least one elongated guide hole 13 extending along the length of the carrier platform 1 is provided on the upper surface of the second installation area 12. At least one set of guide connectors passes through each guide hole 13. The guide connectors are preferably bolt-nut assemblies, with the bolt shank passing through the guide hole 13 and the nut tightened onto the lower surface of the carrier platform 1. Each set of guide connectors has a vertically positioned positioning rod 14 fixedly connected to its top. The positioning rod 14 moves and adjusts its position along the guide hole 13 via the guide connector. The two positioning rods 14 cooperate to clamp the circuit breaker 200 on the left and right sides. This adjustable positioning rod 14 can quickly clamp and fix circuit breakers 200 of different widths, effectively preventing the circuit breaker 200 from shifting due to external disturbances during testing, and ensuring stable and reliable electrical contact. With this structure, the single-pole test crimping module 100 adjusts its position in the first mounting area 11 via a guide rail, and the positioning rod 14 moves and adjusts in the second mounting area to achieve clamping and limiting of the circuit breaker 200, thus forming a complete bidirectional adjustment and positioning system. This system can fully adapt to the testing needs of the entire series of circuit breakers, further improving product changeover efficiency and batch testing efficiency. At the same time, the overall structure is simple and reliable, with low manufacturing and maintenance costs.

[0036] The operation process of the circuit breaker testing auxiliary device in this embodiment is as follows: The first step is product clamping and alignment: According to the number of poles of the circuit breaker 200 to be tested and the spacing of the conductive plates, slide along the linear guide rail 15 to adjust the position of each single-pole test crimping module 100 so that the voltage connecting rod 41 is aligned with the conductive plate of the corresponding pole of the circuit breaker 200; slide a set of positioning rods 14 in the second mounting area 12 to clamp and fix the circuit breaker 200 in a suitable position in the second mounting area 12.

[0037] The second step is to press and lock the circuit breaker 200: Press down on the top of the adjusting rod 3, and the adjusting rod 3 moves down along the first guide groove 16, simultaneously compressing the adjusting spring 9 and driving the transmission bracket 42 and the voltage contact rod 41 to move down; after the voltage contact rod 41 contacts the conductive plate of the circuit breaker 200, the adjusting rod 3 continues to press down to form contact overtravel, the pressing spring 43 is stretched and provides stable contact pressure; when the pressing is in place, release the adjusting rod 3, and the adjusting rod 3 is locked at the current height by the check piece 6 and the limiting tooth 5 forming a rigid stop, and the power-on test begins.

[0038] The third step is unlocking and resetting: After the test is completed, the operator needs to press down the adjusting rod 3 and the reset push rod 7 simultaneously, so that the reset push rod 7 drives the check piece 6 to rotate and disengage from the limiting tooth 5, thereby releasing the one-way limiting constraint between the check piece 6 and the adjusting rod 3; then release both hands, and the adjusting rod 3 will automatically move upward to reset under the action of the adjusting spring 9, driving the voltage connecting rod 41 to disengage from the conductive plate of the circuit breaker 200; at the same time, the reset spring 8 pulls the check piece 6 and the reset push rod 7 to automatically return to the initial standby state, remove the tested circuit breaker, and prepare for the next test.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A universal adjustable circuit breaker testing auxiliary device, characterized in that, include: The carrier platform (1) includes a first installation area (11) and a second installation area (12) spaced apart. The second installation area (12) is used to place the circuit breaker (200) to be tested. The first installation area (11) is provided with at least one set of adjustable single-pole test crimping modules (100). Both the single-pole test crimping module (100) and the circuit breaker (200) can be moved and adjusted in their respective installation areas along the length of the carrier platform (1) to make them aligned and matched. The single-pole test crimping module (100) includes a mounting base (2), an adjusting rod (3), an electrical contact crimping assembly (4), and a limiting mechanism; the mounting base (2) is fixed in the first mounting area (11), and the adjusting rod (3) is made of insulating material and slides through the mounting base (2) in a direction perpendicular to the carrier platform (1); the electrical contact crimping assembly (4) is movably disposed outside the mounting base (2) and electrically connected to the test power supply, and includes a transmission bracket (42) linked with the adjusting rod (3), and a conductive voltage connection rod (41) elastically movably connected to the transmission bracket (42). The voltage contact rod (41) moves downward with the adjusting rod (3) and elastically presses against the conductive plate of the corresponding pole of the circuit breaker (200); the limiting mechanism includes a plurality of limiting teeth (5) spaced apart on the adjusting rod (3) along the moving direction of the adjusting rod (3), and a check member (6) elastically swingable in the mounting base. The check member (6) extends to the movement path of the plurality of limiting teeth (5) and cooperates with the plurality of limiting teeth (5) to form a one-way limiting fit that allows the adjusting rod (3) to move downward in one direction and restricts its upward reverse movement, so as to lock the voltage contact rod (41) at the adjusted height position.

2. The universal adjustable circuit breaker testing auxiliary device according to claim 1, characterized in that: The mounting base (2) is provided with a first guide groove (16) and a second guide groove (17) extending along the moving direction of the adjusting rod (3). The adjusting rod (3) is slidably disposed in the first guide groove (16) and is provided with a force-bearing block (31) extending into the second guide groove (17). An adjusting spring (9) connected to the force-bearing block (31) is provided in the second guide groove (17). The adjusting spring (9) provides the adjusting rod (3) with an elastic force that tends to move upward. Under the action of the adjusting spring (9), the adjusting rod (3) drives the limiting tooth (5) on it to maintain a locking contact with the check piece (6) to maintain a one-way limiting fit.

3. The universal adjustable circuit breaker testing auxiliary device according to claim 1, characterized in that: The check valve (6) is a check valve with a curved structure. It includes a hinge end hinged to the mounting base (2) and a pawl end (61) that forms a one-way limiting engagement with the limiting tooth (5). A guide arc surface (62) is formed on one side of the pawl end (61). When the adjusting rod (3) is pressed and moves downward, it slides along the guide arc surface (62) through the limiting tooth (5) to push open the check valve (6) and create a clearance that allows the adjusting rod (3) to move downward in one direction.

4. The universal adjustable circuit breaker testing auxiliary device according to claim 3, characterized in that: The limiting tooth (5) has an inclined tooth surface (51) and a stop step surface (52) set at an angle; the anti-return element (6) is pressed against the stop step surface (52) of the limiting tooth (5) by the claw end (61) to limit the upward movement tendency of the adjusting rod (3); when the adjusting rod (3) moves downward, the claw end slides along the inclined tooth surface (51) through the sliding engagement of the guide arc surface (62) and the inclined tooth surface (51) to make way for multiple limiting teeth (5) so as to allow the adjusting rod (3) to move downward unidirectionally.

5. The universal adjustable circuit breaker testing auxiliary device according to any one of claims 1-4, characterized in that: The single-pole test crimping module (100) also includes a reset structure connecting the check piece (6). The reset structure includes a reset push rod (7) that is movably inserted into the mounting base (2) and a reset spring (8) disposed between the check piece (6) and the inner wall of the mounting base (2). Under the elastic force of the reset spring (8), the check piece (6) always maintains a contact tendency with the check piece (6). Only when the reset push rod (7) and the adjusting rod (3) are pressed down simultaneously, the reset push rod (7) drives the check piece (6) to rotate around the hinge end and disengage from multiple limiting teeth (5) to release the one-way limiting engagement.

6. The universal adjustable circuit breaker testing auxiliary device according to claim 5, characterized in that: The reset push rod (7) moves through the mounting base (2) in a direction parallel to the adjusting rod (3), and its pushing end extends to abut against the pressure portion on the upper side of the check member (6). The top ends of the reset push rod (7) and the adjusting rod (3) extend out of the top of the mounting base (2) in the same direction. The reset push rod (7) has a first position in which the check member (6) abuts against the limiting tooth (5) to form a one-way limiting fit, and a second position in which the check member (6) swings to disengage from the limiting tooth (5) when pressed down.

7. The universal adjustable circuit breaker testing auxiliary device according to claim 5, characterized in that: The check valve (6) has a connecting protrusion (63) at its hinge end, and the inner wall of the mounting base (2) has a connecting rod (22). One end of the reset spring (8) is hooked to the connecting protrusion (63), and the other end is hooked to the connecting rod (22). The reset spring (8) is used to pull the check valve (6) to reset and rotate after the reset push rod (7) removes the external force, and drive the reset push rod (7) back to the first position.

8. The universal adjustable circuit breaker testing auxiliary device according to claim 1, characterized in that: The mounting base (2) has a vertical opening groove (21) on its side wall near the electrical contact crimping assembly (4). The extension direction of the vertical opening groove (21) is consistent with the movement direction of the adjusting rod (3). The transmission bracket (42) includes a fixedly connected U-shaped frame (421) and a connecting arm (422). The connecting arm (422) extends through the vertical opening groove (21) into the interior of the mounting base (2) and is fixedly connected to the adjusting rod (3) so that the transmission bracket (42) moves synchronously with the adjusting rod (3). The voltage connector (41) is hinged to the U-shaped groove of the U-shaped frame (421) through a rotating shaft structure; a pressure spring (43) is provided between the voltage connector (41) and the transmission bracket (42); a hanging boss (44) is provided at the bottom of one end of the voltage connector (41); one end of the pressure spring (43) is connected to the hanging boss (44), and the other end is connected to the hanging hole opened in the transmission bracket (42); the pressure spring (43) applies elastic pressure to the voltage connector (41) against the conductive plate of the circuit breaker (200).

9. The universal adjustable circuit breaker testing auxiliary device according to claim 8, characterized in that: A rotation limiting structure is provided between the U-shaped frame (421) and the voltage-conducting rod (41) to limit the rotation angle range of the voltage-conducting rod (41) around the rotating shaft structure. The rotation limiting structure includes a set of arc end faces (45) and a set of limiting stops (46) connected to both sides of the opening of the U-shaped frame (421), and a set of sliding inclined surfaces (47) and a set of locking protrusions (48) connected to both sides of the voltage-conducting rod (41). Under the action of the pressing spring (43), the voltage-conducting rod (41) drives its locking boss (48) to abut against the limiting stop (46) of the U-shaped frame (421) to restrict the voltage-conducting rod (41) from rotating downward; when the voltage-conducting rod (41) is pressed, it drives its sliding inclined surface (47) to slide along the arc end face (45) of the U-shaped frame (421), so that the voltage-conducting rod (41) rotates relative to the U-shaped frame (421).

10. The universal adjustable circuit breaker testing auxiliary device according to claim 1, characterized in that... The first installation area (11) is provided with a guide rail (15) extending along the length direction of the carrier platform (1). The bottom of the installation base is provided with a guide rail slider (23) that slides with the guide rail (15). The single-pole test crimping module moves and adjusts its position along the length direction of the carrier platform (1) through the sliding connection between the guide rail slider (23) and the guide rail (15). The second installation area (12) is provided with a guide hole (13) extending along the length direction of the carrier platform (1). At least one set of guide connectors that can move along the guide hole (13) are provided in the guide hole (13). At least one set of positioning rods (14) are connected to the guide connectors. Each set of positioning rods (14) moves and adjusts its position along the guide hole (13) through the guide connectors to cooperate and clamp on both sides of the circuit breaker (200).

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