Miniature circuit breaker short circuit testing device

Abstract

The invention relates to a miniature circuit breaker short circuit test device, and the device comprises a carrier which is used for carrying a plurality of circuit breakers in a first linear direction; the first contact module and the second contact module are located on the two sides of the carrier respectively, and the first contact module and the second contact module make contact with a circuit breaker loaded on the carrier; wherein the first contact module comprises a base and a sliding seat, the sliding seat is connected to the base in a sliding mode, the sliding seat is distributed on the base in the first linear direction, a first contact in contact with the circuit breaker can be installed on the sliding seat, an elastic block is connected between the sliding seat and the base, a telescopic limiting block is arranged on the base, and the limiting block is matched with the sliding seat; therefore, the relative position of the sliding seat and the base is limited. The single circuit breaker is disconnected from the first contact module and is connected with the test circuit, so that when the single circuit breaker breaks down, the safety of the power supply is protected in a mode of disconnecting from the first contact module.

Description

Technical Field

[0001] This application relates to the field of circuit breaker testing technology, and in particular to a short-circuit testing device for miniature circuit breakers. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. During a short circuit, the magnetic field generated by the large current overcomes the counterforce spring, causing the trip unit to activate the operating mechanism, and the switch trips instantaneously. During an overload, the current increases, heat generation intensifies, and the bimetallic strip deforms to a certain extent, pushing the mechanism to activate.

[0003] Before leaving the factory, switchgear in intelligent power distribution systems, especially circuit breakers, requires performance testing to ensure they can promptly disconnect the circuit in the event of a short circuit or overload. During testing, the circuit must be kept in a short-circuit state to simulate normal circuit breaker operation. If a circuit breaker malfunctions and fails to disconnect in time, the power supply will be damaged. To improve testing efficiency, preferred testing devices can test multiple circuit breakers simultaneously. For structural simplicity, a single power supply powers multiple circuit breakers; however, a fault in even one tested circuit breaker can damage the power supply. Summary of the Invention

[0004] Therefore, it is necessary to address the issue of testing security.

[0005] This application provides a short-circuit testing device for miniature circuit breakers, comprising:

[0006] A vehicle, on which several circuit breakers are carried along a first straight line;

[0007] The first contact module and the second contact module are located on both sides of the vehicle, and the first contact module and the second contact module are in contact with the circuit breaker loaded on the vehicle.

[0008] The first contact module includes a base and a sliding seat. The sliding seat is slidably connected to the base and is distributed on the base along a first straight line. The first contact that contacts the circuit breaker can be installed on the sliding seat. An elastic block is connected between the sliding seat and the base. The base is provided with a retractable limiting block. The limiting block cooperates with the sliding seat to limit the relative position of the sliding seat and the base.

[0009] In one embodiment, when the limiting block extends to engage with the sliding seat, the sliding seat is fixed on the base, and the elastic block is elastically deformed by the compression of the sliding seat and the base;

[0010] When the limit block retracts and separates from the sliding seat, the elastic block recovers its elasticity, pushing the sliding seat to move relative to the base, causing the first contact to move away from the circuit breaker.

[0011] In one embodiment, the base has a raised side ridge, and the sliding seat is slidably connected to the side ridge.

[0012] In one embodiment, the first contact module further includes a linear drive unit, and the base is connected to the linear drive unit;

[0013] A push rod is mounted on the base, and the push rod contacts the carrier under the drive of the linear drive unit.

[0014] In one embodiment, the carrier includes a loading rail and a buffer block. The loading rail is movable relative to the second contact module. A circuit breaker is slidably connected to the loading rail. The buffer block is mounted on the loading rail. A push rod pushes the loading rail, causing the buffer block to deform elastically.

[0015] In one embodiment, a base plate is also included, a second contact module is mounted on the base plate, and a loading rail is slidably connected to the base plate;

[0016] The top rod pushes the loading rail, and the buffer block presses against the base plate.

[0017] In one embodiment, a groove is provided at one end of the top rod, the shape of which matches the side profile of the loading rail.

[0018] In one embodiment, the second contact module includes a second contact, which includes a contact body and a positioning block;

[0019] At least two positioning grooves are provided on the base plate along the first straight line direction, and positioning blocks are installed in the positioning grooves.

[0020] In one embodiment, the second contact module further includes a guide plate, and a mounting groove is formed on the base plate along the first straight direction, with the mounting groove located on both sides of the positioning groove;

[0021] The linear drive unit can push the carrier closer to the second contact module, so that the circuit breaker extends into the guide channel formed between the two guide plates.

[0022] In one embodiment, a pusher module is also included, with the pusher module and the carrier located on both sides of the slide seat;

[0023] The linear drive unit can drive the sliding block to move toward the push module, and the push module and the sliding block abut against each other, causing the sliding block to move relative to the base.

[0024] The aforementioned miniature circuit breaker short-circuit testing device has a first contact module and a second contact module electrically connected to the circuit breaker, allowing the circuit breaker to be connected to the test circuit for testing. The sliding seat in the first contact module can move relative to the base, allowing the first contact connected to the sliding seat to separate from the circuit breaker. This enables a single circuit breaker to disconnect from the test circuit at the first contact module, thus protecting the power supply by disconnecting from the first contact module when a single circuit breaker fails. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a short-circuit testing device provided in an embodiment of this application from a first-view perspective.

[0026] Figure 2 This is a three-dimensional structural diagram of a short-circuit testing device provided in an embodiment of this application from a second perspective.

[0027] Figure 3 A three-dimensional structural diagram of a short-circuit testing device provided in an embodiment of this application from a third-person perspective.

[0028] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0029] Figure 5 This is a top view of a short-circuit testing device provided in an embodiment of this application.

[0030] Figure 6 This is a partial structural schematic diagram of a short-circuit testing device provided in an embodiment of this application.

[0031] Figure 7 A three-dimensional structural diagram of the first contact module provided in an embodiment of this application from a first perspective.

[0032] Figure 8 A three-dimensional structural diagram of the first contact module provided in an embodiment of this application from a second perspective.

[0033] Figure 9 for Figure 8 A magnified view of a portion of point B in the middle.

[0034] Figure 10 A cross-sectional view of a first contact module provided in an embodiment of this application.

[0035] Figure label:

[0036] 1. First contact module; 11. Contact unit; 12. Linear drive unit; 13. Guide rod; 111. Bracket; 112. Base; 113. First contact; 114. Top rod; 115. Sliding seat; 116. Connecting seat; 117. Limiting block; 118. Elastic block; 1121. Side edge; 1131. Contact body; 1132. Electrode rod; 1141. Slot; 1151. Tenon; 1152. Positioning hole; 1153. Limiting hole;

[0037] 121. Motor; 122. Threaded seat; 123. Lead screw;

[0038] 2. Base plate; 21. Positioning groove; 22. Mounting groove;

[0039] 3. Second contact module; 31. Second contact; 32. Guide plate; 311. Contact body; 312. Positioning block;

[0040] 4. Carrier; 41. Loading rail; 42. Slider; 43. Slide rail; 44. Buffer unit;

[0041] 5. Pushing module; 51. Base plate; 52. Pushing block;

[0042] 6. Circuit breaker. Detailed Implementation

[0043] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0044] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and 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, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, where the terms "first," "second," "third," and "fourth" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include at least one of that feature. In the description of this application, where the terms "multiple" or "several" appear, "multiple" means at least two, such as two, three, etc., and "several" means one or more, unless otherwise explicitly specified.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0049] See Figure 1-3As shown in some embodiments of this application, a miniature circuit breaker short-circuit testing device includes: a first contact module 1, a base plate 2, a second contact module 3, and a carrier 4. The first contact module 1, the second contact module 3, and the carrier 4 are mounted on the base plate 2. The carrier 4 carries a plurality of circuit breakers 6 along a first straight direction. The first contact module 1 and the second contact module 3 are located on opposite sides of the carrier 4, respectively, and are in contact with the circuit breakers 6 mounted on the carrier 4. The first contact module 1 and the second contact module 3 are electrically connected to the circuit breakers 6, so that the circuit breakers 6 are connected to a short-circuit detection circuit. The short-circuit detection circuit can test whether the circuit breakers 6 are working properly, that is, whether the circuit breakers 6 can disconnect normally.

[0050] In this scheme, the first contact module 1 includes a contact unit 11 and a linear drive unit 12. The contact unit 11 is used to contact the circuit breaker 6 mounted on the carrier 4. The linear drive unit 12 is connected to the contact unit 11. Driven by the linear drive unit 12, the contact unit 11 approaches the circuit breaker 6 and eventually contacts the circuit breaker 6. At the same time, the linear drive unit 12 provides clamping force for the contact unit 11 and the second contact module 3 to stably contact the circuit breaker 6. The contact unit 11 includes a base 112, a first contact 113, and a sliding seat 115. The sliding seat 115 is slidably connected to the base 112 and is distributed on the base 112 along a first linear direction. The first contact 113 is mounted on the sliding seat 115 and contacts the circuit breaker 6. The second contact module 3 includes a second contact 31. The conductive first contact 113 and the second contact 31 respectively contact the two terminals of the circuit breaker 6, connecting the circuit breaker 6 into the test circuit for short-circuit testing. An elastic block 118 connects the sliding seat 115 and the base 112. The base 112 is provided with a retractable limiting block 117, which cooperates with the sliding seat 115 to limit the relative position of the sliding seat 115 and the base 112. The limiting block 117 is controllably connected to the sliding seat 115 to control whether the sliding seat 115 can move relative to the base 112.

[0051] The limiting block 117 is controllably connected to the sliding seat 115 to control whether the sliding seat 115 can move relative to the base 112. Specifically, when the limiting block 117 extends to engage with the sliding seat 115, the sliding seat 115 is fixed on the base 112, and the elastic block 118 is elastically deformed by the compression of the sliding seat 115 and the base 112. When the limiting block 117 retracts and separates from the sliding seat 115, the elastic block 118 elastically recovers, pushing the sliding seat 115 to move relative to the base 112, causing the first contact 113 to move away from the circuit breaker 6. By controlling the sliding of the sliding seat 115 through the limiting block 117, the connection of the first contact 113 to the circuit breaker 6 is controlled.

[0052] In the above embodiment, the sliding seat 115 can move relative to the base 112, allowing the first contact 113 connected to the sliding seat 115 to separate from the circuit breaker 6, thereby disconnecting the individual circuit breaker 6 from the test circuit at the first contact module 1. When a single circuit breaker 6 malfunctions, the power supply is protected by disconnecting from the first contact module 1.

[0053] Understandably, reference Figure 10 As shown, the retractable limiting block 117 is specifically pivotally connected to the base 112, with a portion of the limiting block 117 protruding from the base 112. This protruding portion of the limiting block 117 abuts against the sliding seat 115 to restrict the movement of the sliding seat 115. A receiving groove is provided on the base 112, and the limiting block 117 is located within the receiving groove. A spring is provided between the limiting block 117 and the bottom of the receiving groove. Furthermore, an electromagnet is built into the receiving groove. If several circuit breakers 6 in the test circuit malfunction, the corresponding electromagnet will activate and attract the limiting block 117, causing the limiting block 117 to rotate until it is completely submerged in the receiving groove. This disengages the limiting block 117 from the sliding seat 115. Under the elastic restoring force of the elastic block 118, the sliding seat 115 slides relative to the base 112, causing the first contact 113 to separate from the circuit breaker 6. The retractable limit block 117 can also cooperate with a cylinder to realize the extension and retraction of the limit block 117.

[0054] Furthermore, the maximum capacity of the circuit breakers 6 on the carrier 4 is greater than two. This miniature circuit breaker short-circuit testing device can test two or one circuit breaker 6 simultaneously. That is, this miniature circuit breaker short-circuit testing device can perform tests under full load. In addition, this miniature circuit breaker short-circuit testing device can adapt to circuit breakers 6 with different numbers of poles. For example, this miniature circuit breaker short-circuit testing device can adapt to circuit breakers 6 with no more than three poles.

[0055] Based on the above embodiments, refer to Figure 8 , 9 As shown, the base 112 has a raised side ridge 1121, and the sliding seat 115 is slidably connected to the side ridge 1121. Three sliding seats 115 can be arranged side by side between the side ridges 1121, and the first contact 113 installed on the three parallel sliding seats 115 can contact the three terminals on the same side of a circuit breaker 6.

[0056] In this design, a trapezoidal latch 1151 is provided on one side of the sliding seat 115, and a corresponding groove is provided on the other side of the sliding seat 115 to match the latch 1151. The corresponding two sides of the side edge 1121 are respectively provided with latches 1151 and grooves. The latch 1151 on the sliding seat 115 can engage with the groove of an adjacent sliding seat 115 or with the groove of the side edge 1121. Correspondingly, the groove on the sliding seat 115 can engage with the latch 1151 of an adjacent sliding seat 115 or with the latch 1151 of the side edge 1121. By utilizing the engagement of the latch 1151 and the groove, the sliding seat 115 is driven to slide relative to the adjacent sliding seat 115 or the side edge 1121.

[0057] Furthermore, such as Figure 3 As shown, and refer to Figure 4 , 6 As shown, the second contact 31 includes a contact body 311 and a positioning block 312; the contact body 311 has an electrode rod 1132, which contacts the circuit breaker 6. At least two positioning slots 21 are formed along a first straight line on the base plate 2, and the positioning block 312 is installed in the positioning slots 21. In this design, based on the fact that the aforementioned miniature circuit breaker short-circuit testing device can adapt to circuit breakers 6 with no more than three poles, three positioning slots 21 are arranged side-by-side, and three second contacts 31 inserted into the side-by-side positioning slots 21 are used to contact three terminals on the same side of a circuit breaker 6.

[0058] Meanwhile, the second contact module 3 also includes guide plates 32, which are mounted on the base plate 2 and can be located on both sides of the second contact 31 mounted on the base plate 2. A guide channel for the circuit breaker 6 to extend into is formed between the guide plates 32. During the process of the circuit breaker 6 extending into the guide channel, the position of the circuit breaker 6 on the carrier 4 can be finely adjusted using the guide plates 32 so that the electrode rod 1132 used on the second contact 31 can accurately contact the terminal of the circuit breaker 6. The linear drive unit 12 can push the carrier 4 closer to the second contact module 3, so that the circuit breaker 6 extends into the guide channel formed between the two guide plates 32. In this solution, a mounting groove 22 is opened on the base plate 2 along the first linear direction, and the mounting groove 22 is located on both sides of the positioning groove 21. At the same time, the mounting groove 22 on the base plate 2 is also adapted to circuit breakers 6 with different pole numbers. According to the circuit breaker 6 with different pole numbers, the guide plates 32 are installed into the corresponding mounting grooves 22, so that guide channels of different widths are formed between the guide plates 32.

[0059] Furthermore, refer to Figure 6 , 7As shown, a push rod 114 is mounted on the base 112. Driven by the linear drive unit 12, the push rod 114 contacts the carrier 4. The carrier 4 is movably connected to the base plate 2. Driven by the linear drive unit 12, the push rod 114 can move the carrier 4 toward the second contact module 3, so that the first contact 113 automatically contacts the circuit breaker 6.

[0060] Specifically, the carrier 4 includes a loading rail 41 and a buffer block 44. The loading rail 41 is slidably connected to the base plate 2, allowing it to move relative to the second contact module 3. A circuit breaker 6 is slidably connected to the loading rail 41. The buffer block 44 is mounted on the loading rail 41, and a push rod 114 pushes the loading rail 41, causing the buffer block 44 to elastically deform. In this specific embodiment, the loading rail 41 and the base plate 2 are slidably connected by a slider 42 and a slide rail 43. The slider 42 is mounted on the loading rail 41, and the slide rail 43 is mounted on the base plate 2. The extension direction of the slide rail 43 is perpendicular to the first straight line direction. When the push rod 114 pushes the loading rail 41, and the loading rail 41 approaches the second contact module 3, the buffer block 44 approaches the base plate 2, and the loading rail 41 and the base plate 2 clamp the buffer block 44, causing the buffer block 44 to elastically deform. Driven by the linear drive unit 12, when the push rod 114 moves away from the carrier 4, the buffer block 44 elastically recovers and pushes the loading rail 41 away from the second contact module 3, so that the second contact module 3 is separated from the circuit breaker 6. At the same time, the first contact 113 is also separated from the circuit breaker 6, which facilitates the removal of the circuit breaker 6 from the loading rail 41. Through the linear drive unit 12 driving the loading rail 41, and with the elastic recovery force of the buffer block 44, the first contact 113 and the second contact 31 can automatically connect and disconnect from the circuit breaker 6, thereby improving the automation of the testing device.

[0061] In one specific embodiment, the buffer block 44 includes a spring and a positioning rod. The spring is sleeved on the positioning rod, which is mounted on the loading rail 41. The spring can contact the base plate 2, and the positioning rod can pass through the base plate 2.

[0062] In this design, the base plate 2 has at least two planes with a height difference, including a first plane and a second plane. The height of the first plane is greater than the height of the second plane. The second contact module 3 is mounted on the first plane, while the carrier 4 is mounted on the second plane. The carrier 4 elevates the circuit breaker 6 so that its height matches the height of the second contact 31. A buffer block 44 is located between the first and second planes and will contact the base plate 2.

[0063] More specifically, one end of the push rod 114 is provided with a groove 1141, the shape of which matches the side profile of the loading rail 41. The groove 1141 is V-shaped, forming an angle with the side of the loading rail 41, so that the push rod 114 and the loading rail 41 cooperate to make the push rod 114 stably contact the loading rail 41.

[0064] In some embodiments of this application, the contact unit 11 further includes a bracket 111, which is located between the slide seat 115 and the carrier 4. The bracket 111 has a first through hole and a second through hole, wherein the first through hole is used to load the first contact 113 and the second through hole is used to load the push rod 114.

[0065] In this design, the first contact 113 and the push rod 114 are supported on the bracket 111, and are respectively connected to the sliding seat 115 and the base 112. The first contact 113 and the push rod 114 have two support points to improve their strength.

[0066] Furthermore, the contact unit 11 also includes a connecting seat 116, with the bracket 111 and base 112 mounted on the connecting seat 116. The linear drive unit 12 cooperates with the connecting seat 116, causing the linear drive unit 12 to drive the connecting seat 116 to move linearly, thereby moving the bracket 111 and base 112. In this design, a through sliding groove is provided on the base plate 2, through which the connecting seat 116 passes. The linear drive unit 12, the bracket 111, and the base 112 are located at both ends of the connecting seat 116, placing them on both sides of the base plate 2 to reduce the height of the miniature circuit breaker short-circuit testing device.

[0067] The linear drive unit 12 drives the connecting seat 116 to move linearly. Specifically, the linear drive unit 12 includes a motor 121, a threaded seat 122, and a lead screw 123. The motor 121 is mounted on the bottom surface of the base plate 2, the lead screw 123 is mounted on the power output end of the motor 121, and the threaded seat 122 is mounted on the connecting seat 116. The lead screw 123 and the threaded seat 122 are threadedly connected. The motor 121 drives the lead screw 123 to rotate, and the rotation of the lead screw 123 is converted into linear motion of the connecting seat 116 through the cooperation of the threaded seat 122 and the lead screw 123. The connecting seat 116 can reciprocate linearly within the sliding groove.

[0068] It is understood that the linear drive unit 12 includes, but is not limited to, a motor 121, a threaded seat 122, and a lead screw 123. The linear drive unit 12 can also be a cylinder, with the cylinder's extension / retraction output rod connected to the base plate 2. The extension / retraction of the cylinder drives the base plate 2 to reciprocate linearly within a sliding groove. The linear drive unit 12 can also be other common linear actuators.

[0069] Furthermore, such as Figure 2As shown, the first contact module 1 also includes a guide rod 13, which is located on the same side of the base plate 2 as the linear drive unit 12. The guide rod 13 is mounted on the base plate 2, and its extension direction is perpendicular to the first linear direction. The guide rod 13 is also mounted on the connecting seat 116, specifically, the guide rod 13 passes through the connecting seat 116, allowing the connecting seat 116 to slide on the guide rod 13. The guide rod 13 restricts the sliding direction of the connecting seat 116, causing the connecting seat 116 to reciprocate along a direction perpendicular to the first linear direction. More specifically, there are at least two guide rods 13, located on opposite sides of the linear drive unit 12. The two guide rods 13 restrict the sliding direction of the connecting seat 116, and the guide rods 13 on both sides of the linear drive unit 12 further stabilize the sliding of the connecting seat 116.

[0070] In some embodiments of this application, the miniature circuit breaker short-circuit testing device is applied to a single-pole circuit breaker 6. The loading rail 41 includes two movable sub-rails, which are spliced ​​together to form a complete loading rail 41. Multiple circuit breakers 6 are loaded on the sub-rails, and drivers are installed on the sub-rails. Under the drive of the drivers, the sub-rails can close or separate. A collection box is provided below the loading rail 41. In this scheme, when testing a circuit breaker that is functioning normally in the circuit, the first contact 113 and the second contact 31 are in contact with the normally functioning circuit breaker, and the electrode rod 1132 in the first contact 113 and the second contact 31 can support the circuit breaker; correspondingly, when testing a circuit breaker that has a fault in the circuit, the first contact 113 is separated from the circuit breaker. At this time, the loading rail 41 carrying the circuit breaker is detached from the circuit breaker. The normally operating circuit breaker can maintain its position because it is supported by the electrode rods 1132 at both ends. However, the faulty circuit breaker 6 will fall into the collection box because the first contact 113 is separated from the circuit breaker and the circuit breaker 6 lacks support. This small circuit breaker short circuit test device can screen out the faulty circuit breaker 6.

[0071] The separate rails are equipped with actuators that drive the rails to move in opposite directions, causing displacement in both rails. The actuators can be electrodes and lead screws, with two threads having opposite directions. The two rails engage with the two threads respectively, causing them to move in opposite directions. During the separation of the two rails, the circuit breaker 6 detaches from the rails, and the exposed part during the separation is the collection box located below the loading rail 41.

[0072] In some embodiments of this application, such as Figure 5 , 9 As shown, the testing device also includes a pusher module 5, which and the carrier 4 are located on opposite sides of the sliding seat 115. The linear drive unit 12 can drive the sliding seat 115 to move toward the pusher module 5, and the pusher module 5 abuts against the sliding seat 115, causing the sliding seat 115 to move relative to the base 112.

[0073] More specifically, the portion of the limiting block 117 that abuts against the sliding seat 115 is ratcheted, with one side of the ratchet having a greater slope than the other, the side with the greater slope facing the circuit breaker 6. The side with the smaller slope faces the push-up module 5. During the process of the push-up module 5 pushing the sliding seat 115, the sliding seat 115 comes into contact with the side with the smaller slope, and the spring in the receiving groove compresses to completely sink the limiting block 117 into the receiving groove. When the sliding seat 115 moves to its position, the limiting block 117 abuts against the sliding seat 115, fixing the sliding seat 115 to the base 112. At this time, due to the influence of the elastic restoring force of the elastic block 118, the sliding seat 115 abuts against the side with the larger slope, and the sliding seat 115 cannot force the limiting block 117 to completely sink into the receiving groove.

[0074] Furthermore, the push-up module 5 includes a base plate 51 and push-up blocks 52. The push-up blocks 52 are distributed on the base plate 51 along a first straight line, and the number of push-up blocks 52 is consistent with the maximum capacity of the circuit breaker 6. The push-up blocks 52 can push the sliding seat 115, causing the sliding seat 115 to reset. Specifically, the sliding seat 115 is provided with a positioning hole 1152, which cooperates with the push-up blocks 52. A portion of the push-up blocks 52 can extend into the positioning hole 1152, forming a fixed structure between the push-up module 5 and the sliding seat 115.

[0075] In this scheme, when circuit breaker 6 malfunctions, the corresponding sliding seat 115 will slide, causing the first contact 113 to separate from circuit breaker 6, thus disconnecting circuit breaker 6 from the test circuit. At this time, the displaced sliding seat 115 is closer to the push-up module 5 than the corresponding sliding seat 115 of the normal circuit breaker 6. After completing one round of testing of circuit breaker 6, the contact unit 11, driven by the linear drive unit 12, moves towards the push-up module 5. The displaced sliding seat 115 will first contact the push-up block 52, and then be blocked by the push-up block 52, causing the sliding seat 115 to slide relative to the base 112, so that the sliding seat 115 returns to being flush with the corresponding sliding seat 115 of the normal circuit breaker 6, ready for the next round of testing of circuit breaker 6.

[0076] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A short-circuit testing device for a miniature circuit breaker, characterized in that, include: A carrier (4) on which a plurality of circuit breakers (6) are carried along a first straight line; The first contact module (1) and the second contact module (3) are located on both sides of the carrier (4), and the first contact module (1) and the second contact module (3) are in contact with the circuit breaker (6) mounted on the carrier (4). The first contact module (1) includes a base (112) and a sliding seat (115). The sliding seat (115) is slidably connected to the base (112) and is distributed on the base (112) along the first straight line direction. A first contact (113) that contacts the circuit breaker (6) can be installed on the sliding seat (115). An elastic block (118) is connected between the sliding seat (115) and the base (112). A retractable limiting block (117) is provided on the base (112). The limiting block (117) cooperates with the sliding seat (115) to limit the relative position of the sliding seat (115) and the base (112).

2. The short-circuit testing device according to claim 1, characterized in that, When the limiting block (117) extends to engage with the sliding seat (115), the sliding seat (115) is fixed on the base (112), and the elastic block (118) is elastically deformed by the compression of the sliding seat (115) and the base (112). When the limiting block (117) retracts and separates from the sliding seat (115), the elastic block (118) elastically recovers and pushes the sliding seat (115) to move relative to the base (112), so that the first contact (113) moves away from the circuit breaker (6).

3. The short-circuit testing device according to claim 2, characterized in that, The base (112) is provided with a protruding side ridge (1121), and the sliding seat (115) is slidably connected to the side ridge (1121).

4. The short-circuit testing device according to claim 3, characterized in that, The first contact module (1) further includes a linear drive unit (12), and the base (112) is connected to the linear drive unit (12); A top rod (114) is installed on the base (112), and under the drive of the linear drive unit (12), the top rod (114) contacts the carrier (4).

5. The short-circuit testing device according to claim 4, characterized in that, The carrier (4) includes a loading rail (41) and a buffer block (44). The loading rail (41) is movable relative to the second contact module (3). A circuit breaker (6) is slidably connected on the loading rail (41). The buffer block (44) is mounted on the loading rail (41). The push rod (114) pushes the loading rail (41), causing the buffer block (44) to elastically deform.

6. The short-circuit testing device according to claim 5, characterized in that, It also includes a base plate (2), the second contact module (3) is mounted on the base plate (2), and the loading rail (41) is slidably connected to the base plate (2); The top rod (114) pushes against the loading rail (41), and the buffer block (44) presses against the base plate (2).

7. The short-circuit testing device according to claim 6, characterized in that, The top rod (114) has a slot (1141) at one end, and the shape of the slot (1141) matches the side profile of the loading rail (41).

8. The short-circuit testing device according to claim 6, characterized in that, The second contact module (3) includes a second contact (31), which includes a contact body (311) and a positioning block (312); At least two positioning grooves (21) are provided on the base plate (2) along the first straight line direction, and the positioning block (312) is installed in the positioning groove (21).

9. The short-circuit testing device according to claim 6, characterized in that, The second contact module (3) also includes a guide plate (32), and an installation groove (22) is formed on the base plate (2) along the first straight direction. The installation groove (22) is located on both sides of the positioning groove (21). The linear drive unit (12) can push the carrier (4) closer to the second contact module (3), so that the circuit breaker (6) extends into the guide channel formed between the two guide plates (32).

10. The short-circuit testing device according to claim 4, characterized in that, It also includes a pusher module (5), which and the carrier (4) are located on both sides of the sliding seat (115); The linear drive unit (12) can drive the sliding seat (115) to move toward the push module (5), and the push module (5) abuts against the sliding seat (115) so that the sliding seat (115) moves relative to the base (112).

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